Abstract:
By inserting a male screw for fixing a ratchet claw into a nut placed on an insert core and the like to prevent rotation, it is possible to eliminate additional screw processing on the insert core, to increase magnetic resistance between a magnet and the insert core provided with the former, to concentrate irradiation of magnetic flux from the second magnet pole toward outside and to fix the magnet and the second magnet pole onto the insert core with screws. Further, by tapering an axial hole of the rotor, it is possible to easily and accurately attach the insert core or the rotor to a crankshaft. Furthermore, by inserting a removal parts of a removal tool into a perforation hole of the rotor, it is possible to realize quick and simple removal of the rotor from the crankshaft.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    This invention relates to a magneto electric generator rotor used in an internal combustion engine spark plug and an implement for removing this rotor.  
           [0003]    2. Explanation of Prior Art  
           [0004]    [0004]FIGS. 45 and 46 show a broken down section of a small size engine used in a conventional operating machine In said figures numeral I is a small size engine,  1  is a cylinder for said engine  1 , and  13  is a connecting rod supporting a piston that moves in this cylinder  12  Also,  14  is a crankshaft for eccentric driving the end of said con rod  13 , and  15  is a nut to fix rotor B attached to the end of this crankshaft  14 .  
           [0005]    One side of said rotor B that is on the opposite side of an axial hole part through which the crankshaft  14  is inserted through secures a magnet  2  and forms a pole piece part P together with a magnetic pole  3 , while the other side is composed of an insert core  26  of a ferromagnetic material that becomes counter weight part  4 . Further, a cooling fan and the like is installed to this insert core  26  to form one body.  
           [0006]    Numeral  6  is a non-magnetic material layer such as a synthetic resin layer formed in a discoidal shape so as to cover said insert core  26 .  
           [0007]    On one hand  7  is a ratchet claw which is supported in a freely revolving manner to an axle part  8  having a hole  8   a  as a cylinder part. Also, as shown in FIG. 46, a male screw  10  is inserted through this axle part  8 , and the tip of this male screw  10  is screwed into and fixed to female screw  27  which has been formed beforehand in said insert core  26 .  
           [0008]    Numeral  9  is a ratchet spring of which one end is fixed to said axle part S, and the other end is fixed to said ratchet claw  7  and this gives a rotating force in one direction to the ratchet claw  7 .  
           [0009]    Also, a reel axle  29  is provided in one body so as to project into an operating machine frame  28  opposite to said rotor B. A reel  16  having continuously wound thereon a rope  17  is supported on this reel axle  29  in a freely rotating manner. On to this reel  16  provided with an engagement part  30  which catches said ratchet claw  7  and gives a rotating force to the reel  16 .  
           [0010]    A spiral spring  18  is installed in the periphery of said reel axle  29  to apply to said reel  16  a rotating force around this reel axle  29 .  31  is a washer fixed to the end of the reel axle  29  by a screw  32  and serves as a protector to prevent the axle hole of the reel  16  from coming off of the reel axle  29 . Moreover, the reel axle  29 , the reel  16 , the rope  17 , the spiral spring  18 . The engagement part  30 , the ratchet claw  7  and the like form a recoil starter.  
           [0011]    Also,  19  is a coil unit formed a power generating coil, ignition coil, ignition control circuit and the like in one body with thermosetting or thermoplastic synthetic resin and is fixed to said cylinder  12  side.  
           [0012]    [0012] 20  is a plug cap connected to said coil unit  19  through a cable  33 . This plug cap  90  is connected to a plug  21  next to the cylinder  12 .  28  is the operating machine frame housing an engine.  
           [0013]    In a small size engine made of such a construction, the reel  16  rotates by manually pulling the rope  17  wound on this reel  16 , and the engagement part  30  installed on said reel  16  catches on the ratchet claw  7  on rotor B which has a magnet  2  buried in the insert core  26 , and rotates rotor B.  
           [0014]    In this way, because said rotor B is attached to the crankshaft  14  of the engine  1 , the crankshaft  14  is driven to rotate by said rotor B and the engine  1  is cranked up.  
           [0015]    On one hand, at that time the magnetic flux of the magnet  2  attached to said rotor B interlinks with the coil unit  19  having an ignition control circuit fixed to the cylinder  12  side of said engine  1 . Said coil}unit  16  will thus generate a power output and this power output will be supplied to the ignition plug  2  through the cable  3  q and the plug cap  20 , and by this, the ignition plug  21  will generate a spark, ignite the gas mixture in the cylinder  12 , and start up the engine  1 .  
           [0016]    Further, the fixing of the ratchet claw  7  described previously is done by screwing in the axle part  8  supporting it in a ratable manner to the insert core  26  of the male screw  10 . For this reason the female screw  27  conforming to the male screw  10  is machine tooled as aforementioned in the said rotor B.  
           [0017]    On one hand, the rotor shown in FIGS. 47 and 48 has been proposed in the past as a rotor used in a magnetic power generating machine such as the one described above. This rotor BI is a rotor having a hole piece part  44  with a magnet  42  on one side and an insert core  41  as a counter weight part  45  on the opposite side of an axial hole part  43  buried as an insert form within a synthetic resin (not shown). This rotor B 1  is described in, for example Japanese Utility Model Publication 1993-10526.  
           [0018]    In this conventional rotor BI, the insert core  41  has been made into an integrated unit with a rivet  47  riveting together layers of multiple magnetic plates in multiple locations, and said axial hole part  43  is a straight hole with the diameter being equal in the direction of the axle.  
           [0019]    Also, of the  3  magnetic poles,  46 ,  46   a  and  46   b  forming the pole piece  44 , said magnet  42  is inserted in an open hole  49  formed in the center magnetic pole  46 , and both ends of the magnet protrude outward towards the axial fringe of each magnet pole  46 ,  46   a  and  46   b.    
           [0020]    In such insert core  41 , the pole piece part  44  and the counter weight part  45  are formed in one body, and because there is no need for assembly work and machine tooling after die casting the advantage of a relatively low cost is achieved.  
           [0021]    On one hand, in the past, when removing the rotor of a magnetic power generator from the crankshaft  14  of an engine such as shown in FIG. 45, a pulley removing tool is used to remove the pulley attached to the rotary axle.  
           [0022]    [0022]FIG. 49 shows such a conventional pulley removing tool and a rotor B 2  of a magnetic power generator removed therewith. In said drawing,  14  is the engine crankshaft, and this crankshaft  14  is provided with an axial hole  43  for rotor B 2  having a magnet and counter weight and the like, and made in a virtually circular form with a non-magnetic material.  
           [0023]    Also, said rotor B 2  is fixed to the crankshaft  14 , so as not to come off freely, with a nut  15  screwed on a male screw part  48  formed on the crankshaft  14  end Moreover, F is a multiple bladed cooling fan installed along the circuit direction of one side of the rotor B 2 .  
           [0024]    On one hand  50  is a bolt attachment part on which a bolt  51  is screwed on at the center part and to both ends are connected arms  52  and  53  through axle supports  54  and  55 , and a disengagement claw  53   a  is installed on the tip of the arm  53 .  
           [0025]    With this pulley removing tool, first the disengagement claw  53   a  of each of said arm  53  ends is disengaged at the inner surface of the outer circuit part of the rotor B 2  that is pressed against the crankshaft  14  and the tip of said bolt  15  is pressed against the tip of the crankshaft  14 .  
           [0026]    Further, the nut  15  is removed from the male screw part  48  before and after such operation, then said bolt  51  is screwed on the attachment part  50 . With this, the arms  52  and  53  will be subjected to an axial directed torque due to the screwing on power and change the position of the supporting axles  54  and  55  to the center, and the rotor B 2 , which was being held by the disengaging claw  53   a , is removed in the axial direction from the crankshaft  14 .  
           [0027]    [0027]FIG. 50 shows a conventional rotor removal tool and a rotor B 2  of a magnetic power generator that is removed with said tool. In the drawing  56  is multiple screw holes provided on the rotor B 2  so as to pass through both sides of said rotor.  
           [0028]    Also,  57  is a male screw, whose tip can be screwed into the screw hole  56 . Said male screw  57  is screwed into a through hold  59  provided in a plate  58  and the male screw  57  is prevented from pass in through by a screw head  57   a.    
           [0029]    On to said plate  58 , a bolt  51  is screwed into its center part and it is possible for the tip of the bolt to hit the tip of said crankshaft  14 .  
           [0030]    According to this removal tool, the tip of the male screw  57  is screwed into said screw hole  56  in certain depth, then said bolt  51  is screwed into the plate  58  until the tip of the bolt  51  hits the end of the crankshaft  14 .  
           [0031]    Then, while keeping said plate  58  in a position that is parallel to the rotor B 2 , said bolt  51  is screwed in. By doing this, the power to remove the rotor B 2  from the crankshaft  14  is provided to the rotor through the male screw  57  in the plate  58 . For this reason the rotor B 2  can be smoothly removed from the crankshaft  14 .  
           [0032]    However, with a rotor B of a conventional magnetic power generator such as that shown in FIGS. 45 and 46, even at present when the nonprocessing of the rotor B has become advanced, but only the processing of the screw (female screw)  27 , which is used for fixing said ratchet claw  7 , cannot be eliminated For this reason a reduction in cost could not be achieved.  
           [0033]    Also, with a rotor using an insert core of layered magnetic plates and formed into an approximately circular shape with plastic, the processing of said screw for use in attaching the ratchet could not be carried out without performing special work such as inserting aluminum parts.  
           [0034]    Also, because the axial hole part  43  is a straight hole in the rotor BI of the conventional magnetic power generator shown in FIGS. 47 and 48, when assembling said axial hole part  43  to the crankshaft  14  of the internal combustion engine, it is difficult to provide sufficient cohesive strength to both parts. Also, in order to provide sufficient cohesive strength to both parts, it is necessary to use a separately prepared cohesion aid tool.  
           [0035]    Also, in order to provide sufficient cohesion strength to said axial hole part  43  and said rotor BI, said axial hole part  43  can be made into a tapered hole and tighten the bond between both parts. However, in said layered insert core  41 , the tapered hole will be terraced with each layer of the plate. For this reason, the contact with said crankshaft  14  will become shaky and the cohesion between both parts will be imperfect.  
           [0036]    Further, because both ends of the magnet  42  protruded out (out of the thickness) in the axial fringe direction Z of each magnetic pole  46 , the magnetic flux of said magnet  42  could not be sufficiently concentrated on magnetic pole  46 . That is a part of the magnetic flux would leak outside the magnetic pole  46  and will not reach the power generating coil and ignition coil. For this reason, the power generating capacity for ignition and the like cannot be sufficiently generated.  
           [0037]    Also, when using a layered insert core  41  in an attempt to sufficiently bring out the capacity of said magnet  42 , it will be necessary to increase the thickness of the layers which results in increase of weight of whole rotor. Also, in case the layered thickness is altered partially, the increase of initial cost accompanying the increased cost for press molds and the increase in the process steps and costs cannot be avoided.  
           [0038]    Further, it has been proposed that an insert core  41  be formed with a magnetic sintered alloy and said magnet introduced between the insert core  41  and the magnetic pole on the support provided thereon. However, in this case it will be necessary to make the support fairly thick due to the conditions for forming.  
           [0039]    For this reason, this support will invite shortages in the magnetic circuit and the magnetic flux generation rate in said magnetic pole will deteriorate, and the power generating capacity in said power generating coil and the like will also become inadequate.  
           [0040]    Further, in the removal method for rotor B 2  shown in FIG. 49, it will be necessary to disengage the disengaging claw  53  along the outer surface of the rotor B 2 . At present, when miniaturization of the magnetic power generator and engine is being aimed at, it is difficult to keep the space required for such a disengagement claw  53  on the peripheral of said rotor B 2 , and as a result such a pulley removal tool cannot be practically used.  
           [0041]    Also, in the removal method shown in FIG. 50, it is necessary to apply an additional process of a screw hole  3  S for the rotor obtained by molding to the latter steps of processing, and the non-processing of the rotor B 2  cannot be realized which will invite a decrease in production efficiency and an increase in cost  
         SUMMARY OF THE INVENTION  
         [0042]    The present invention was made based on said situation, and the object is to provide an inexpensive magnetic power generator rotor on which a claw can be easily and reliably attached without any special workmanship nor screw processing.  
           [0043]    Also, this invention has the object of enabling an adequate concentration of said magnetic flux of a magnet to the magnetic pole by increasing the magnetic resistance of the magnetic circuit connecting the magnetic pole to the insert core, thereby obtaining a magnetic power generator rotor that can improve the power generating capacity in the power generating coil and the like.  
           [0044]    Also, this invention has the object of obtaining a magnetic power generator rotor that can more adequately concentrate the magnetic flux of a magnet on a specific magnetic pole.  
           [0045]    Also, this invention has the object of obtaining a magnetic power generator rotor that can fix the magnet and magnetic pole to the insert core reliably and inexpensively without subjecting the insert core to any machine tooling at all.  
           [0046]    Also, this invention has the object of obtaining a magnetic power generator rotor that can reliably prevent a magnet from shifting out of place on the target surface when assembling on an insert core.  
           [0047]    Also, this invention has the object of obtaining a magnetic power generator rotor that enables the easy implementation of the operation for tightly fastening with a screw and nut a magnet and magnetic pole to an insert core.  
           [0048]    Also, this invention has the object of obtaining a magnetic power generator that enables the easy installation and fixture of an insert core of sintered alloy to a crankshaft.  
           [0049]    Also, this invention has the object of obtaining a magnetic power generator rotor that can reliably implement a stoppage of the rotation of a axial hole part on a crankshaft.  
           [0050]    This invention has the object of obtaining a magnetic power generator rotor that enables removal from a crankshaft very easily and reliably with a removal tool, without subjecting to an additional process such as providing a screw hole or the like.  
           [0051]    Also, this invention has the object of obtaining a magnetic power generator rotor removal tool that enables the removal of a rotor from a crankshaft in a simple operation and manipulation, even without having sufficient work space in the periphery of the rotor.  
           [0052]    Also this invention has the object of obtaining a magnetic power generator rotor removal tool that enables the removal of a rotor from a crankshaft with a simple disengaging operation for a removal perforation of a removal part.  
           [0053]    To achieve aforementioned objects, in the magnetic power generator rotor of this invention, a nut rotation blocking hole and an insert hole for said male screw are provided on a part of the insert core to which a rotation ratchet claw is fixed, thereby there is no need for a screw thread processing on this insert core itself latter, and said ratchet claw can be fixed to the insert core through an axial part supporting in freely rotating manner said ratchet claw by merely fastening said nut to said rotation blocking hole and screwing the tip of the male screw, which had been passed through said perforation.  
           [0054]    In addition, by forming the axial part supporting said ratchet claw in a manner enabling rotation in one body with said insert core during the formation of said insert core, it is not necessary to use a cylindrical part forming said axial part as a part and therefore lowering of costs can be planned.  
           [0055]    Also, the magnetic power generator rotor of this invention is provided at the pole piece part with a first pair of magnetic poles formed in one body on the insert core and a second pair of magnetic pole made from a magnetic plate installed between said first magnetic poles and held the magnet between said insert core, so that the magnetic flux density that is radiated outside through the second magnetic poles is increased and the concentration of the magnetic field to such as the power generating coil and the like is made possible.  
           [0056]    Also, the magnetic power generator rotor of this invention introduces the second magnetic pole through a non-magnetic part between the first magnetic poles and a magnet is contained between the said insert core with the second magnetic poles, and thus the concentration of the magnetic flux of the electro-magnet at the second magnet poles is made possible.  
           [0057]    Also, the magnetic power generator rotor of this invention makes possible the concentration of the magnetic flux of a magnet at the second magnetic poles, that is in a condition of being magnetically insulated from the first magnetic poles, by screwing said second magnetic pole on to the insert core between the first magnetic poles with a non-magnetic screw through a magnet.  
           [0058]    Also, the magnetic power generator rotor of this invention makes it possible to easily fix said magnet and second magnet pole to said insert core by tightening said screw from the outside of the second magnetic pole, by joining the magnet and the second magnetic pole to the screw and nut to be fixed at the indented hole pan of the opening on the side of the insert core.  
           [0059]    Also, the magnetic power generator rotor of this invention makes it possible to prevent the magnet from shifting its position to the axial and circular directions of the rotor and fixing the magnet in its proper position between first two magnetic poles by providing shift-protecting ribs on the target surface of the insert core magnet so as to cover at least the 3 sides of the bottom end of the magnet.  
           [0060]    Also, the magnetic power generator rotor of this invention simplifies the screwing in operation required for the screws and nuts by making the indented hole part for the nuts the shape and size of the rotation block for the nut and screwing said screw into the nut from the outside of the second magnetic pole.  
           [0061]    Also, the magnetic power generator rotor of this invention makes it possible to utilize their shapes and structure capable of reducing the mass by molding the insert core with a sintered magnetic alloy, to maximize the concentration of the magnetic flux of the magnet at the magnetic poles by equalizing the length of the axial fringe direction of the magnet and the magnetic poles, and to ensure a firm contact of the axial hole part with the crankshaft by making the axial hole part a tapered hole.  
           [0062]    Also, in the magnetic power generator rotor according to this invention, the forming of the key groove against the axial hole part can be simplified because the insert core can be obtained by molding of the sintered alloy, and therefore using this key groove has made it possible to reliably block the rotation of the rotor having said insert core against the crankshaft.  
           [0063]    Also, in the magnetic power generator rotor according to this invention, the forming of the key protuberant for the axial hole part can be simplified because the insert core can be molded with the sintered alloy, and using this key protuberant has made it possible to reliably block the rotation of the rotor having said insert core against the crankshaft.  
           [0064]    Also, with the magnetic power generator rotor of this invention a straight hole as the axial hole part can be formed simultaneously with its inside surface in a smooth condition at the time of forming the insert core, and it has been made possible to avoid such bothersome post processing as surface grinding of the inside of the axial hole part as done in the prior art.  
           [0065]    Also, with the magnetic power generator rotor of this invention the extraction part of a removal tool for removing the rotary body from the crankshaft is being inserted in the rotor and a multiple of perforations for removal purpose whose peripheral part is engaged with this extraction part is being provided on the rotor; and therefore it is possible to remove the rotor from the crankshaft by insertion of said removal tool into the perforations followed by the operation of the peripheral engagement and further by the extraction operation of the removal tool.  
           [0066]    Also, the magnetic power generator rotor removal tool according to this invention is provided with a plate positioned opposite to the magnetic power generator rotor having an axial hole in the crankshaft of the engine, a screw part screwed into the center part of said plate so as to pass through the plate with the tip part touching the end of said crankshaft, and a multiple of extraction parts positioned so as to stop one end part from passing through said plate; therein an engagement part inserted into a multiple of perforations for removal provided in said rotor and engaged with the peripheral part of said perforations is formed at the other end of said extraction part. Therefore, by inserting the end part of said extraction part into the perforations for removing the rotor and carrying out the rotation operation, the engagement part of the extraction part hitches on to the peripheral of the perforations for removal and further applies a direct torque generated by the screwing-in operation of the part to the rotor and crankshaft through said engagement part so that the rotor can be removed from the crankshaft.  
           [0067]    Also, the magnetic power generator rotor removal tool of this invention is provided at the end of the removal part with an engagement protuberant that can be engaged in the peripheral of the perforations for removing the rotor with the rotation operation. Therefore, by pulling up said extraction part in this engaged condition by screwing in the screw part through the plate, the extraction of the rotor from the crankshaft is made possible.  
           [0068]    Also, the magnetic power generator rotor removal tool of this invention is provided with an engagement protuberant part at the tip of the extraction part that can be engaged in the area of the perforations for removing the rotor by a linear motion operation. Therefore, by pulling up said extraction part in this engaged condition by screwing in the screw part through the plate, the extraction of the rotor from the crankshaft is made possible.  
           [0069]    Also, the magnetic power generator rotor removal tool of this invention is provided with an engagement protuberant part at the tip of the extraction part that can be engaged in the area of the perforation for removing the rotor by the rotation operation of a plate provided with an extraction part. Therefore by pulling up said extraction part in this engaged condition by screwing in the screw part through the plate, the extraction of the rotor from the crankshaft is made possible.  
       
    
    
     BRIEF EXPLANATION OF DRAWINGS  
       [0070]    [0070]FIG. 1 is a sectional drawing showing a partly broken down small size engine having a magnetic power generator rotor in accordance with the configuration for implementing this invention.  
         [0071]    [0071]FIG. 2 is a sectional drawing showing an enlargement of the principal parts of the rotor in FIG. 1.  
         [0072]    [0072]FIG. 3 is a left side view showing the principal parts of the rotor in FIG. 9.  
         [0073]    [0073]FIG. 4 is a sectional drawing showing an enlargement of the principal parts of a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0074]    [0074]FIG. 5 is a front view showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0075]    [0075]FIG. 6 is a front view showing the insert core in FIG. 5.  
         [0076]    [0076]FIG. 7 is a longitudinal section view of the insert core shown in FIG. 6.  
         [0077]    [0077]FIG. 8 is a dismantle deal drawing showing an enlargement of the magnetic pole and magnet in FIG. 6.  
         [0078]    [0078]FIG. 9 is a dismantle deal drawing showing an enlargement of another example of the magnetic pole and magnet in FIG. 6.  
         [0079]    [0079]FIG. 10 is a front view showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0080]    [0080]FIG. 11 is a front view showing the insert core in FIG. 10.  
         [0081]    [0081]FIG. 12 is a longitudinal section view of the insert core shown in FIG. 11.  
         [0082]    [0082]FIG. 13 is a front view showing a partially broken down insert core insert core in a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0083]    [0083]FIG. 14 is a sectional drawing showing a partially broken down insert core in a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0084]    [0084]FIG. 15 is a front sectional view showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0085]    [0085]FIG. 16 is a side sectional view showing the partially broken down magnetic power generator rotor in FIG. 15  
         [0086]    [0086]FIG. 17 is a line A-A sectional view of FIG. 13.  
         [0087]    [0087]FIG. 18 is a line B-B sectional view of FIG. 15  
         [0088]    [0088]FIG. 19 is a dismantle view showing the partially broken down magnetic power generator rotor in FIG. 15.  
         [0089]    [0089]FIG. 20 is a side sectional view showing a partially broken down magnetic power generator rotor in this invention after being ejection formed.  
         [0090]    [0090]FIG. 21 is a front view of the principal parts showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0091]    [0091]FIG. 22 is a plane view of the magnetic power generator rotor in FIG. 21.  
         [0092]    [0092]FIG. 23 is a side sectional view of the magnetic power generator rotor in FIG. 21.  
         [0093]    [0093]FIG. 24 is a back view of the magnetic power generator rotor in FIG. 21  
         [0094]    [0094]FIG. 25 is a line C-C sectional view of FIG. 21.  
         [0095]    [0095]FIG. 26 is a line D-D sectional view of FIG. 21.  
         [0096]    [0096]FIG. 27 is a front view showing a partially broken down magnetic power generator rotor according to another configuration for implementing this invention.  
         [0097]    [0097]FIG. 28 is a longitudinal section view of the rotor shown in FIG. 27  
         [0098]    [0098]FIG. 29 is a front view showing the insert core in FIG. 27.  
         [0099]    [0099]FIG. 30 is a dismantle view of the principal parts showing the insert core in FIG. 27.  
         [0100]    [0100]FIG. 31 is a longitudinal section view showing the insert core in FIG. 27.  
         [0101]    [0101]FIG. 32 is a front view of the principal parts showing another example of the axial hole part area in this invention.  
         [0102]    [0102]FIG. 33 is a longitudinal section view of the axial hole part area in FIG. 32.  
         [0103]    [0103]FIG. 34 is a front view of the principal parts shown in another example of the axial hole part area in this invention  
         [0104]    [0104]FIG. 35 is a longitudinal section view of the axial hole area in FIG. 34.  
         [0105]    [0105]FIG. 36 is a front view showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0106]    [0106]FIG. 37 is a partially cut off sectional view showing a magnetic power generator rotor removing tool according to one configuration for implementing this invention  
         [0107]    [0107]FIG. 38 is a dismantle view of a principal part showing the relation between the perforation for removal and the extraction part in FIG. 37.  
         [0108]    [0108]FIG. 39 is a front view showing a magnetic power generator rotor according to another configuration for implementing this invention.  
         [0109]    [0109]FIG. 40 is a dismantle view of a principle part showing the relation between the perforation for removal and the extraction part in FIG. 39.  
         [0110]    [0110]FIG. 41 is a sectional view of a principal part showing the condition of engagement of the perforation for removal and an extraction part in FIG. 40.  
         [0111]    [0111]FIG. 42 is a front view showing a magnetic power generator rotor of another configuration for implementing this invention.  
         [0112]    [0112]FIG. 43 is a dismantle view of a principal part showing the relation between the perforation for removal and an extraction part in FIG. 42  
         [0113]    [0113]FIG. 44 is a section view of a principal part showing the condition of engagement of the perforation for removal and an extraction part in FIG. 43.  
         [0114]    [0114]FIG. 45 is a sectional view showing a partially broken down conventional small size engine.  
         [0115]    [0115]FIG. 46 is a sectional view showing an enlargement of part of the rotor in FIG. 45.  
         [0116]    [0116]FIG. 47 is a dismantle view showing an insert core in a conventional magnetic power generator rotor.  
         [0117]    [0117]FIG. 48 is a longitudinal section view of the insert core shown in FIG. 47.  
         [0118]    [0118]FIG. 49 is a side view showing a conventional pulley removal tool.  
         [0119]    [0119]FIG. 50 is a side view showing a conventional rotor removal tool. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0120]    In FIGS. 1 and 2, identical symbols indicated previously are affixed to the parts identical with the past examples in FIGS. 45 and 46.  
         [0121]    In rotor A of the magnetic power generator of the configuration according to this implementation, a ratchet claw  7  is provided as shown in FIG. 2 to an axial part  8  having a perforation  8   a  as it cylindrical part. Moreover,  10  is a male screw pushed through a perforation  23  which is formed by a perforation  8   a  of said axial part  8  and an insert core  5 .  
         [0122]    Furthermore,  11  is a nut which is screwed on the end of said male screw  10  and secures said axial part  8  to said insert core S. Moreover, a nut  11  is located in a rotation blocking hole  24  formed in said insert core  5 , and blocks rotation despite the screwing in operation of said male screw  10 . FIG. 3 shows a hexagonal concave shape slightly larger than said nut  11 .  
         [0123]    Also, said rotation blocking hole  24  can be formed with a non magnetic layer  6  such as synthetic resin and aluminum wit lout providing an insert core  5 .  
         [0124]    Consequently, in the rotor of a small size engine with such a construction, in case said ratchet claw  7  is installed on the insert core  5 , first the ratchet claw  7  is attached to said axial part  8  in a freely rotating manner, then the male screw  10  is screwed through the axial part  8 .  
         [0125]    Next, after inserting said male screw  10  into the perforation  23  which has been pre-formed in the insert core  5 , the nut  11  is screwed on to the end of said male screw  10  which is protruding out from the insert core  5 .  
         [0126]    Said screwing on action can be easily and quickly effected by screwing on the male screw  10  to the nut  11 , which has been installed in the rotation blocking hole  24 , through the axial part  8 .  
         [0127]    Therefore, according to the configuration of this embodiment, there is no need to purposely carry out the screw thread process for the male screw in order to screw the male screw  10  on to the insert core  5 , and said ratchet claw  7  can be easily secured.  
         [0128]    Further according to the configuration of this embodiment, the shape of said rotation blocking hole  24  is shown as being hexagonal, but it can be any shape if the rotation blocking effect can be achieved when the nut  11  is embedded.  
         [0129]    Next, FIG. 4 is a partial sectional view showing another configuration for implementing this invention, and the difference with the above described embodiment is in the point that the axial part  8  supporting the ratchet claw  7  in a free rotating manner has been formed into one unit with the insert core  5  when forming the latter. In all other respects it is identical with the embodiment described above, so a duplication of explanation will be omitted.  
         [0130]    With such a construction, the need to prepare said axial part  8  as a separate part will disappear, and it will be possible to plan a cost reduction by eliminating the number of parts used, and an improvement In the efficiency of assembly work.  
         [0131]    Further, in the configuration for implementation shown in FIGS. 1 through 4, an insert core  5  formed by using a tempered bonding metal of a magnetic material was shown, but a layered magnetic plate would also have the same effect as that described previously.  
         [0132]    Moreover, in said configuration for implementation, the case where an insert core  5  is covered with a synthetic resin layer that is of a non-magnetic material and formed into a disc shape was described, however, as long as it is a non-magnetic material, anything can be used. For example, it can be covered with an aluminum die cast using aluminum.  
         [0133]    Furthermore, said configuration for implementation explained the case where an insert core  5  was used with the axial hole between a pole piece part P on one side and a counter weight part  4  on the other side, however it goes without saying that the present invention can also be applied when the pole piece part P and the counter weight part  4  are separated.  
         [0134]    [0134]FIG. 5 is a front view showing a magnetic power generator rotor B 3  according to another configuration for implementing this invention, and in said drawing  61  is an insert core made from a magnetic sintered alloy forming an approximately I-shape as a whole, and  62  is a non-magnetic material layer such as a synthetic resin layer and aluminum die cast layer formed by ejection to cover the insert core  1 .  
         [0135]    Also, with said insert core  61 , an axial hole part  63  is between a pole piece part  65 , with a magnet  64  on one side, facing a counter weight part  67  on the other side  
         [0136]    The said pole piece  65 , as shown in FIG. 6, has a pair of approximately L-shape magnetic poles  65   a  projecting at one end of an insert core  61 , a concave part  65   b  for attachment indented between said magnetic poles  65   a , a pair of engagement blocking protuberance  65  projecting from the opposite walls in said concave part  65   b  for attachment, and a magnetic receptacle part  65   d  protruding from the bottom part of said concave part  65   b  for attachment.  
         [0137]    Also,  66  is a magnetic pole formed in an approximately horseshoe shape by a magnetic material as a whole, and as shown in FIG. 8 at both ends are installed engagement pieces  66   a , which can be engaged with said engagement blocking protuberance  65   c.    
         [0138]    Further,  64  is a magnet and when the engagement piece  66   a  is engaged with said engagement blocking protuberant  65   c , the magnet  64  will be held between the bracket-shaped part of said magnetic pole  66  and the receptacle surface of said magnetic receptacle part  65   d.    
         [0139]    In short, said magnetic pole  66  is formed independently of insert core  61 , and when assembling the rotor it is attached to said insert core  61 , and at the point of attachment (separate part) the magnetic resistance of the magnetic circuit will increase.  
         [0140]    Furthermore, said magnetic pole  66  and the magnet  64  form one part of said pole piece  65 , and the magnet pole  66  comes close to a power generating coil and ignition coil which are not shown in the drawings and functions to generate voltage.  
         [0141]    An insert core  61  having a pole piece part  65  and a counter weight part  67  as shown in FIGS. 6 and 7, is positioned in a metal mold that is not shown in the drawing and each part excluding the axial hole part  63  is ejection formed, or aluminum die cast formed, and a disc shape rotor coated with a non-magnetic material layer  62  as shown in FIG. 5 is formed.  
         [0142]    Also,  68  is a cooling fan formed simultaneously when enjection forming or aluminum die cast forming said synthetic resin, and protrudes in an ideal shape to carry out the cooling of the internal combustion engine.  
         [0143]    Also, the axial line directional Z length of said magnet  64  is equal with the magnet  65   a  and  66 ; therefore, the magnetic flux of the magnet  64  is concentrated in magnetic pole  66  and can affect the ignition coil and power venerating coil, that are not shown in the drawing, with high efficiency.  
         [0144]    Also, said counter weight part  67  has the necessary and sufficient weight to match the weight of said pole piece part  65 , and is designed to improve the inertial moment of the insert core  61 , and is formed in an approximately arc shape as a whole.  
         [0145]    The insert core  61  having the axial hole part  63 , the pole piece part  65  and the counter weight part  67  is formed by a magnetic piece made from a sintered alloy as one unit using one metal mold as described previously.  
         [0146]    Also, said axial hole part  63  is a tapered hole whose inside diameter changes in the direction of the axial fringe as described previously. Because this tapered hole is formed by the metal mold simultaneously when forming said insert core  61 , it becomes possible to smoothly finish the inside surface.  
         [0147]    For this reason, when installing a rotor B 3 , having such a tapered hole as the axial hole part  63 , under pressure on the crankshaft  14  of the internal combustion engine, a part of the tapered hole will be in tight contact with the outer surface of the crankshaft  14 . For this reason said rotor can be accurately attached to is designated position on the crankshaft.  
         [0148]    Also, the outer surface part of each of said magnetic poles  65   a  and  66  is slightly exposed outside of said non-magnetic material layer, and thus is able to efficiently supply the magnetic flux of the magnet  64  to the power generating coil and the ignition coil. Consequently, it is possible to increase the power generating efficiency of each of these coils.  
         [0149]    A magnetic power generator rotor B 3  with such a construction is attached to the crankshaft  14  of an internal combustion engine and rotates as described above and adequately affects the magnetic flux from the magnetic pole  66  on to the power generating coil and ignition coil positioned in the area of the rotor B 3  and generates an induced power of a pulse form in each of these coils.  
         [0150]    In this case, said magnetic pole  66  is formed into one unit with the magnet  64  which is installed in the magnetic receptacle part  65   d  of the insert core  61  by its engagement piece  66   a.    
         [0151]    For this reason, the magnetic resistance of the magnetic circuit at the part of engagement of this engagement piece  66   a  and the engagement blocking protuberant  65  that blocks the engagement becomes great. In short, the shortage part of the magnetic circuit can be lowered and virtually all of the magnetic flux generated by the magnet  64  engagement, and thus it is possible for the magnetic flux passing through this magnetic pole  66  to adequately affect said coils. As a result, it is possible to drastically improve the power generating capability of each coil.  
         [0152]    Moreover, in order to further reduce the shortage part in the magnetic circuit it is also possible to narrowly control the start up piece  66   b  of the magnetic pole  66  covering the side of said magnet  64  as shown in FIG. 9.  
         [0153]    [0153]FIG. 10 is a rotor showing another configuration for implementing this invention, and the insert core forming this rotor, as shown in FIG. 11, blocks a multiple layered magnetic plate with a rivet  72  and is composed of layers.  
         [0154]    Even in this configuration of embodiment, excluding the axial hole part  73 , said insert core  71  is formed in a disc shape covered by a non-magnetic layer  79 , and the axial hole part  73  is between a pole piece part  75  having a magnet  74  on one side and a counter weight  76  on the opposite side.  
         [0155]    Said pole piece part  75  has, as shown in FIGS. 11 and 12, a pair of approximately L shape magnetic poles  75   a  protruding at one end of an insert core  71 , a concave part  75   b  for attachment indented between each of said magnetic poles  75   a , an engagement blocking protuberant  75   c  projecting from a pair of walls facing each other in said concave part  75   b  for attachment, and a magnet receptacle part  75   d  projecting from the bottom of said concave part  75   b  for attachment.  
         [0156]    Also,  77  is a magnetic pole formed in an approximately horseshoe shape by a magnetic plate, and at both ends, as shown in FIG. 7, an engagement piece  77   a , which can be engaged with said engagement blocking protuberant  75   c , is provided.  
         [0157]    [0157] 74  is said magnet, which is secured between the bracket-shaped part of said magnetic pole  77  and the receptive surface of said magnet receiving part  75   d  at the time of engaging the engagement piece  77   a  with said engagement blocking protuberant  75   c    78  is a fan used for feeding air, and  79  is a non-magnetic material layer.  
         [0158]    Further, said magnetic pole  77  and magnet  74  also comprise a part of said pole piece part  75 , and magnetic pole  77  approaches near a power generating coil and an ignition coil which are not shown in the drawing and forms a magnetic circuit for generating voltage.  
         [0159]    In this configuration of embodiment, the axial line directional Z length of the magnetic pole  77  and the magnet  74  are equal, and moreover is greater than the thickness of the insert core  71 , therefore it is possible for the highly dense flux generated by magnet  74  to adequately affect said power generating coil and the like through magnetic pole  77  having a weak magnetic resistance (the mutual contact area is equal).  
         [0160]    [0160]FIG. 13 shows another configuration for implementing this invention. In said drawing,  81  is an insert core made from sintered alloy of non-magnetic material or a layered magnetic plate. In this insert core  81 ,  82  is an axial hole part such as a tapered hole or straight hole and the like,  83   a  is a pair of L shape magnetic poles provided at one end of insert core  81 , and  83   b  is a concave part for attachment formed between each of the magnet poles  83   a.    
         [0161]    Also,  83   a  is a cut off part formed on the facing walls of the concave part  83   b  for attachment,  84  is a horseshoe shape magnetic pole supported by said facing walls  83   b  in such a manner that the engagement pieces  84   a  at both ends seem to be biting into the non-magnetic part  83   d  provided in the cut off part  83   a  and which is made of magnetic plates.  
         [0162]    Also,  85  is a magnet which is held between said magnetic pole  84  and the bottom part of said concave part for attachment  83   b . Magnetic poles  83   a ,  84  and magnet  85  form the pole piece part.  
         [0163]    The insert core  8 I comprised thus is identical with each of said configurations for embodiment, and over these are provided a non-magnetic layer by ejection forming of synthetic resin or aluminum die casting to prepare a disc shape rotor.  
         [0164]    In this configuration of embodiment, by providing a non-magnetic part  83   d , such as that described previously between the magnetic pole  84  and the magnetic pole  83   a , the magnetic resistance at the engagement blocking part (connecting part) becomes very strong.  
         [0165]    Consequently, the flow of magnetic flux from the magnetic pole  84  to the magnetic pole  83   a  is reduced. In short, the shortage part of the magnetic circuit becomes small and it becomes possible for much of the flux from magnet  85  to pass through magnetic pole  84  and be adequately concentrated in such as the power generating coil and the like.  
         [0166]    [0166]FIG. 14 shows a configuration of another embodiment of this invention. This configuration of embodiment places a magnet  94  and a magnetic pole  95  of about the same size on top of one another in order at the bottom part of the concave part for attachment  93   b  formed between a pair of L shaped magnetic poles  93   a , and by screwing these to the bottom of said bottom part with a non-magnetic material screw  96 , made of such as stainless steel and the like, fixes the magnet  94  and the magnetic pole  95  to the insert core  91 .  
         [0167]    This configuration of embodiment is able to virtually avoid magnetic shortages in the magnetic pole  95  and the insert core  91  because the magnetic pole  95  is attached to the insert core  91  through a non-magnetic screw  96  As a result, the magnetic flux from the magnetic pole  95  can be adequately concentrated in the power generating coil and the like, and can achieve the original excellent power generating capacity FIGS. 15 through 20 show a magnetic power generator rotor B 4  according to another configuration for implementing this invention.  101  is an insert core and is comprised of the pole piece part  104  and the counter weight part  105  that have the axial hole part  102  between them and secure the magnet  103 .  
         [0168]    Also,  106  is the first pair of magnetic poles formed as one unit with said insert core  101 , and  107  is the second pair of magnetic poles made of a magnetic material and fixed between said first pair of magnetic poles  106  through said magnet  103  by a non-magnetic screw (bolt)  108  and a nut  109 , and is press formed.  
         [0169]    Furthermore,  110  are ribs for preventing a shift in position provided on the attachment surface of said magnet  103  so as to bring said magnet  103  between the ribs,  111  are concave hole parts engaging said screw  108 , and  112  is a concave hole part that is wider than said concave hole parts  111 . These are also open at the other side of the insert core  101 .  
         [0170]    [0170] 113  was formed by carrying out such as ejection forming into disc shape on the assembled insert core  101 , and is for example a synthetic resin layer of non-magnetic material as shown in FIG. 20.  
         [0171]    Next, the procedure for assembling said insert core  101  will be described. First, said insert core  101  is formed with a powder such as for example iron oxide that is a magnetic material using a metal mold with a pole piece part  104  having the first pair of magnetic poles  106  as shown in the drawing, the concave parts  111  and  112  as shown in FIG. 195 for installing a screw  108  and a nut  109 , the ribs  110  for preventing a shift in the position of the magnets provided between said first pair of magnetic poles  106 , and for example a tapered axial hole part  102 , and a balance weight  105  on the other side of said axial hole  102 .  
         [0172]    Also, at about the center between said magnet  103  and the second pair of magnetic poles  107  perforations  103   a  and  107   a  are provided. Said screw  108  is inserted into these perforations  103   a  and  107   a  and a nut  109  is attached to a suitable position on said screw  108 .  
         [0173]    To the insert core  101  are installed from the side using a fising tool, the assembled unit of said magnet  103  and the second pair of magnetic poles  107  provided with said screw  108  and nut  109  so as to place the magnet  103  between the ribs  110  for prevention of a shifting in position provided between the first pair of magnetic poles  106  in the pole piece part  104  of said insert core  101 ; and also the screw  108  is installed so as to be placed in the concave hole part  111  and the nut  109  in the concave hole part  112 .  
         [0174]    Next, said magnet  103  and the second pair of magnetic poles  107  installed with said fixing tool is to be secured, but in the case of this invention these can be tightened and fixed by simply turning said screw  108  in a tightening direction against the nut  1   09  that is restricted from turning by the concave hole part  112 .  
         [0175]    That is, because the concave hole part  112  that fits in said nut  109  provided in said insert core  101  is, as shown in FIGS. 16 and 17, a hole that has been made only slightly larger than the opposing aforementioned nut  109 . The opposing part of the nut  109  comes in contact with the wall of said concave hole part  112  and even when the screw  108  is tightened said nut  109  itself does not rotate.  
         [0176]    On one hand, because the concave hole part  111 , in which said screw  10 S fits into, has a clearance for said  108  to smoothly rotate in as shown in FIG. 18, no difficulty whatsoever occurs in the tightened fixture of said magnet  103  and the like.  
         [0177]    Furthermore, if the position of said concave hole part  112  is located in a place away from the magnetic field of said magnet  10 ) 3 , a magnetic body can be used. Also, said axial hole part  102  was made a tapered hole for easy release of the mold when forming, but it can also be a straight hole.  
         [0178]    Next, the assembled insert core  101  including such as said magnet  103  and the magnetic poles  107 , is set up to expose a part of the outer-most part of the first pair of magnetic poles  106  and the second pair of magnetic poles  107  of the insert core  101  to the metal mold for ejection molding use which is a non-magnetic material such as for example synthetic resin, and the outer shape is formed into a disc shape as shown in FIG. 20 by the ejection forming of the synthetic resin. The rotor is completed in this way.  
         [0179]    Further, depending on needs, the provision of a cooling fan for engine cooling to said disc shape rotor is optional.  
         [0180]    Generally, a pre-magnetized magnet is used for said magnet  103  but depending on the case, there are times when a magnetic body that has not been magnetized is used. In such case, the magnetic body can be magnetized into a magnet after said ejection forming.  
         [0181]    Also, in said configuration of embodiment, a case carrying out ejection molding with synthetic resin, which is a non-magnetic body, was shown, but ejection molding with such as the conventional aluminum die cast can be carried without being restricted to synthetic resin to achieve the same results as that in said configuration of embodiment.  
         [0182]    [0182]FIGS. 21 through 26 show another configuration of the magnet  103  and the magnetic poles  107 . In this configuration of embodiment, the ribs  113  for preventing a slip in position have been provided to prevent the bottom part of said magnet  103  from shifting in the direction of the thrust (one thrust direction in this configuration of embodiment) and in the direction of intersection.  
         [0183]    Also, in this configuration of embodiment, on one side of said ribs  115  for preventing a shift in position in the thrust direction and the insert core  101 , as shown in FIGS. 23 and 25, a concave hole part  116  has been provided enabling the insertion of a screw  108  attached to said magnet  103 .  
         [0184]    On one hand, on the other side of said insert core  101 , as shown in FIGS. 24 and 26, there is provided a concave hole part  117  enabling said nut  109  to be inserted from the other side and a concave hole part  118  in which the bottom end of said screw  108  is seated.  
         [0185]    In this configuration of embodiment, first the nut  109  is inserted in said concave hole part  117  from said other side of the insert core  101 , next the screw  108 , which has been passed through said magnet  103  and the second magnet poles  107 , is screwed in from said one side, then at this time the end of the screw  108  is screwed into the nut  109 .  
         [0186]    Subsequently, with said second magnetic poles  107  in the condition of being positioned in the ribs  11 S for preventing a shift in position, by screwing said screw  108  into said nut  109  with a tool, said magnet  103  can be fixed firmly in the insert core  101  without resulting in a shift of position.  
         [0187]    In other words, in this configuration of embodiment, the ribs  115  for preventing a shift in position, which have been provided at the established position for the insert core  101  of the magnet  103 , can be easily prevented from shifting in either the from, back, left or right direction when assembling the magnet  103  with the screw  108  and the nut  109  without using an engagement tool. Therefore, the magnet  103  and the lo second magnetic poles  107  will be safely secured in their established positions even after assembling.  
         [0188]    [0188]FIGS. 27 and 28 show another configuration of embodiment of a magnetic power. generator rotor B 5 , and  121  is an insert core having an approximately H shape as a whole, and  122  is a non-magnetic material layer made of synthetic resin, aluminum die cast and the like which has been ejection molded in disc shape so as to cover the insert core  121 .  
         [0189]    Also, said insert core  121  has on one side a pole piece  124  having a magnet  126  and on the other opposite side a counter weight  125  with an axial hole part  123  between them.  
         [0190]    Of these, as shown in detail in FIGS.  29   30  and  31 , the pole piece  124  is comprised of the L shape magnetic poles  124   b  protruding from both ends of a  1  shape magnetic pole piece  124   a ; the magnetic poles  124   d  as magnetic material (plates) supported by the supporting column  124   c  erected as one unit on said magnetic pole piece  124   a ; and the magnet  126  provided in an open hole  121  a formed between the magnetic piece  124   a , the supporting column  124   c  and the magnetic pole  124   d.    
         [0191]    Here, this magnet  126  is equal in axial line directional length with each of the magnetic poles  124   b  and  124   d , therefore the magnetic flux from magnet  126  is concentrated in magnetic pole  124   d  and very efficiently affects an ignition coil and an power generating coil which are not shown in the drawing.  
         [0192]    Also, said counter weight part  125  has the necessary and adequate weight to match the weight of said pole piece part  124 , and is designed to improve the inertial moment against the insert core  121 , and overall is of an approximately arc shape.  
         [0193]    The insert core having the axial hole part  123 , the pole piece part  124  and the counter weight part  125  is formed as one unit using one metal mold with a magnetic body made from sineered alloy. Consequently, the shape and size of this insert core  121  can be optionally selected, and the weight and production cost can be lowered in comparison to conventional layered insert cores. tapered hole with its diameter changing in the axial line direction, and because this tapered hole is formed by the metal mold simultaneously with the fonTilnu of said insert core, it is possible to finish the inside surface smoothly.  
         [0194]    For this reason, a part of the tapered hole part of the rotor having such a tapered hole as the axial hole part  123  w  11  fit tightly so as to bite into the outer surface of the crankshaft when installing on the crankshaft of an internal combustion engine. Consequently, said rotor can be accurately installed in the established position on the crankshaft.  
         [0195]    An insert core  121  such as shown in FIGS. 29 through 31 is positioned with a metal mold that is not shown in the drawing, and each part excluding the axial hole part  123  is ejection formed with synthetic resin, or formed by aluminum die casting, and coated with a non-magnetic material layer  122  such as shown in FIGS. 97 and 28, to form a disc shape rotor.  
         [0196]    Also, a multiple of cooling fans  127  are formed as one unit on one side of this disc shape non-magnetic material layer  122 . These cooling fans  127  provide ventilation with the rotation of such a rotor, and is used for cooling the engine.  
         [0197]    Also, the outer surface part of said magnetic poles  124   b  and  124   d  are slightly exposed on the outside of said non-magnetic material layer  122 , and thus can efficiently supply the magnetic flux from the magnet to the power generating coil and the ignition coil and the like. Consequently, it is possible to raise the power generating efficiency of each of these coils.  
         [0198]    Also, the axial hole part  123  provided at the center part of an insert core  121  such as described above has a tapered hole, but as shown in FIGS. 32 and 33 by forming as one unit a key groove  128  in the axial direction in the axial hole part  123  when forming said insert core  121 , the rotation block on the crankshaft of the rotor can be made reliable when fitting to the key protuberant pre-formed on the crankshaft.  
         [0199]    Further, in case a key protuberant cannot be provided on the crankshaft itself, by inserting a piece in the key groove  128  the rotation block for the rotor against said crankshaft can be reliably accomplished.  
         [0200]    Also, as shown in FIGS. 34 and 35, by providing the key protuberant  129  as one unit in the axial direction in said axial hole part  123  at the time of said forming, the blocking of rotation of the rotor on the crankshaft can be reliably accomplished when fitted to the key groove pre-formed on the crankshaft.  
         [0201]    Further, said key groove  128  and key protuberant  129  can be formed simultaneously with the forming of the crankshaft, therefore the processing steps for the rotor will not increase for the purpose of fomliing said groove and protuberant. In short, the need to implement a separate step for processing the key groove  128  and the key protuberant  129  after forming the axial hole part  123  will be eliminated, and also the need to prepare separate key parts will be eliminated, and it will be advantageous from operational and economical points.  
         [0202]    [0202]FIG. 36 shows a rotor B 6  according to another configuration of embodiment of this invention, which has an axial hole  132  at its center part for fitting, with the engine crankshaft. This axial hole  132  is formed in a tapered shape as needed.  
         [0203]    Said rotor has in opposing positions (opposing positions of 180 degrees to each other) a pole piece part (not shown in the drawing) consisting of a magnet and magnetic poles and a counter weight (not shown in the drawing) with the axial hole  132  between them.  
         [0204]    Also,  133  is multiple locations of said rotor B 6 , and here they are perforations for removal that have been formed in 2 places. These removal perforations  133  consist of a perforation  133   a  through which a rod shape extraction part that is part of the removal tool described later on can be passed through, and a pin perforation hole  133   b  through which an engagement pin connected to said extraction part as a continuation of the through hole  133   a  Moreover,  133   c  are cooling fans placed apart at equal distances.  
         [0205]    [0205]FIG. 37 shows said removal tool and the removal structure for removing said rotor B 6  from the crankshaft In said drawing  135  is the crankshaft fitted to said axial hole  132  of the rotor  131 .  
         [0206]    A nut  136  is fitted tightly on a male screw  135   a  at the tip of the crankshaft  135 , and the rotor B 6  is fixed so that it will not easily come off of crankshaft  135 . Further, this nut  136  can be removed at the time of the above mentioned removal operation.  
         [0207]    Also,  137  is for example a disc shape plate comprising a support for removal tool H, and at the center of this plate  137  is screwed in a screw part  138  such as a bolt whose tip is in contact with the end part of said crankshaft  135 , and furthermore perforated holes  139  have been provided in a multiple of locations on this plate  137 .  
         [0208]    [0208] 140  is an extraction part of said removal tool H passed through these perforated holes  139 , and a head part  141  for blocking removal has been provided at one end and at the other end an engagement pin  142  has been provided as an engagement part.  
         [0209]    Furthermore, the diameter of said other end part of the removal part  40  is slightly smaller than the perforated hole  133   a  of the removal perforation  133  shown in FIG. 1, and the engagement pin  142  has a length freely enabling a through passage through said pin perforation hole  133   b , and in the area other than this pin perforation  133   b , extends outside of the diameter o the perforation hole  133   a.    
         [0210]    Consequently, in a rotor removal tool H with such a structure, when removing a rotor B 6  from a crankshaft  135 , said other end of each removal part  140  is first inserted in the A direction of the arrow in removal perforation  133  as shown in FIG. 38  
         [0211]    This insertion is accomplished by inserting the extraction part  140  itself into the perforation  133   a  and the engagement pin  142  into perforation  133   a  of said removal perforations  133 .  
         [0212]    Next, after insertion, each removal part  14  per se is rotated at for example 90 degrees in the B direction of the arrow at said perforation  13  . As a result, each engagement pin  14  reaches the perforation  133   a  area behind the rotor B 6 , and when said screw part  138  is screwed into the plate  137  under such condition, the engagement pin  142  will come in contact with the rear surface of the rotor B 6  in the perforation  143   a  area.  
         [0213]    Also, with the screwing in of this screw part  138 , after the tip hits the end surface of said crankshaft  135 , the plate  137  will move in the opposite direction (midright side in FIG. 37) to the crankshaft  135 .  
         [0214]    For this reason, the engagement pin  142  at the end of said extraction part  140  that is blocked on the plate  137  is turned in the extraction direction (mid-right side of FIG. 37) from the rear side of the rotor B 6 , and this rotor B 6  is subject to a strong pulling torque and is smoothly removed from the crankshaft  135 .  
         [0215]    [0215]FIGS. 39 and 40 show another configuration for implementing this invention. In this configuration of embodiment, a multiple (2 here) of rectangular removal perforations  145  are formed on rotor B), and against the removal perforations  145  there are the insertion hook parts  147  as engagement parts of the end of extraction part  146  attached to the plate  7  along the surface of the plate so as to be moveable in a direct line.  
         [0216]    Consequently, in this configuration of embodiment, after inserting the hook part  147  of the end of the extraction part  146  into the perforation  145  in the C direction of the arrow similarly as described above, by moving the extraction part  146  on said plate  147  in a direct line toward the D direction of the arrow as shown in FIG. 5, the hook part  147  can be positioned behind the rotor B 6  as shown in FIG. 41. Subsequently, by screwing in the screw part  138 , the removal of said rotor B 6  can be carried out similarly as described above.  
         [0217]    [0217]FIGS. 42 and 43 show another configuration for implementing this invention. In this configuration of embodiment, a multiple (2 here) of L shape removal perforations  148  are formed on the rotor B 6 , and for these removal perforations  148  the hook part  150  as an engagement part of the end of extraction part  149  attached to the plate  1 . 3   7  is made insertable.  
         [0218]    Further said removal perforations  148  are comprised of the circumference directed hole  148   a  along the direction of the circumference of the rotor B 6 , and the diameter directed hole  148  extending in the direction of the radius of the rotor B 6 .  
         [0219]    Consequently, in this configuration of embodiment, similar to that shown in FIG. 37, after inserting the hook part  150  of the extraction part  149  supported on the plate  137  in the E direction of the arrow to the diameter directed hole  148  of the removal perforation  148 , said plate  137  is turned in the F direction of the arrow for only a few degrees.  
         [0220]    By doing this, after positioning said hook part  150  behind the rotor B 6  in the area of said circumference directed hole  148   a , by screwing in said screw part  138  as shown in FIG. 44, the hook part  150  can be blocked behind the rotor B 6 , and by continuing to screw in the screw part  138  the removal of the rotor B 6  can be carried out similarly as described above.  
         [0221]    Further, in this case, by moving horizontally after inserting the extraction part  149  itself in the diameter directed hold  148   b  without turning said plate  137 , the hook, part  150  can be positioned behind the rotor B 6 , therefore as described above the removal of rotor B 6  can be carried out.  
         [0222]    Furthermore, without being restricted to the hooks  147  and  150  provided at the ends of said extraction parts  146 , and  149  and by using all other protuberance instead, it goes without saying that the extraction of the rotor B 6  can be carried out as described above.