Abstract:
A magnetic controlled power generator provides a magnetic controlled loading device, power generator and flywheel device to form two independent modules which are easily assembled and disassembled for easy manufacture and maintenance. Besides, the magnetic controlled power generator has simple installation and lightweight components to generate a radial displacement for magnetic flux control, achieving continuous adjustment of the load resistance, thereby having the effect of reducing the cost and weight.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a magnetic controlled power generator, to rearrange the relative location of the magnetic controlled loading device, power generator, and flywheel device to form two independent modules for easy assembly and disassembly. 
     2. Description of the Related Art 
     Sports equipment with a magnetic controlled power generator can produce flywheel inertia force, power generation and magnetron load regulation. The magnetic controlled power generator includes a magnetic controlled loading device, power generator and flywheel. 
     A magnet rotates with the flywheel to form a magnetic circuit of the armature core for a coil of the armature core producing electricity, which is the principle of a permanent-magnet alternating current generator. The magnetic controlled power generator uses this principle by making the flywheel as the source for the alternating current generator, so that the voltage produced will go through a power line into an AC/DC converter. This will provide the power for the magnetic controlled loading device and achieve electrical loading control. Further, the eddy current resistance is formed by using changes in the magnetic field, thus becoming a breaking loading method. Its fundamental principle is using a conductive metal plate and moving it through a magnetic field. The magnetic fields opposing the change, or so called “eddy current.” Moreover, according to Maxwell&#39;s Equation, the intensity of the magnetic force is in direct proportion to the square of magnetic flux density. The magnetic force can be applied to the exercise machine&#39;s braking loading. 
     However, the prior art disclosed above has the following drawbacks: 
     1. If the magnetic controlled loading device, power generator and flywheel have poor compatibility, the magnetron load regulation, power generation efficiency and flywheel inertia forces will affect sports equipment and thus it is difficult to assemble and repair the components. 
     2. If the loading portion uses permanent magnets as its magnetic field source, then it is very difficult to link up to external digital signals, and thereby unable to attain the goal of computerization and digitization, unless there is a motor and motor controller to change the relative location of the magnets and conductors, or utilizing magnetic wire coils and external power sources to overcome these problems. 
     Therefore, the inventor has studied the problems mentioned above and made improvements to overcome the problems. 
     SUMMARY OF THE INVENTION 
     It is an object of the present invention to provide a magnetic controlled power generator to provide two independent modules to be easily assembled and disassembled for easy manufacture and maintenance. 
     It is another object of the present invention to provide the magnetic controlled power generator with simple installation and lightweight components to generate a radial displacement for magnetic flux control, achieving continuous adjustment of the load resistance, thereby having the effect of reducing the cost and weight. 
     In order to achieve the above objects, the magnetic controlled power generator comprises a flywheel device having a first bearing disposed within a hub of the flywheel device, the flywheel device being recessed under a wheel rim, which forms an accommodating space, a metal conductor being mounted on an inner surface of the wheel rim; a magnetic controlled loading device arranged within the accommodating space of the flywheel device to form a magnetic controlled power generator; wherein the flywheel device includes an annular body being arranged within the accommodating space and being concentric with an axis of the hub to form an inner annular groove and outer annular groove within the accommodating space, the annular body has a first magnet at an inner side thereof, a transmission element is arranged at an outer side of the flywheel device to drive the flywheel device for rotation, and the transmission element has at least a second bearing inserted therein; and the magnetic controlled loading device includes a coil holder; a shaft penetrating through the coil holder; an armature core mounted to a rear side of the coil holder; a rear frame having a groove opposing to the armature core in the center of a shaft hole for arranging the armature core, the armature core being fitted in the inner annular groove of the accommodating space for the rotation of the first magnet of the annular body corresponding to the electricity generation of the fixed armature core, the groove having a first positioning hole in the center corresponding to a front side of the coil holder thereof; a pair of pole pieces being opposite facing circular shapes and having a pair of second magnets arranged on an outer side thereof and a compression spring fitted to an inner side thereof, the pole pieces each further having an end swiveled in a pivot and a movable free end, the pivot of the pole pieces being diagonally positioned on the rear frame, a pull rope being joined to the free end; a front frame adapted to match the rear frame, the front frame having a second positioning hole corresponding to the first positioning hole, the front frame being joined to the rear frame and the coil holder with a plurality of screws so that the pole pieces are located between the two frames and fitted in the outer annular groove of the accommodating space; a slide and a stepped surface being arranged near the pull rope between the two frames the slide being radially located on a top of the stepped surface; an adjustment block being arranged within the slide for radial displacement, the adjustment block having two positioning grooves facing to the corresponding pull ropes at the free ends of the pole pieces and formed at both sides of the adjustment block for the pull ropes respectively passing through both sides of the slide to the two positioning grooves; and an adjusting drive mechanism passing through the stepped surface to connect a lower end of the adjustment block, which is selectable to use an electric or a manual adjustment method to drive the adjustment block for a radial sliding movement; whereby the shaft of the magnetic controlled loading device joints to the hub of the flywheel device to form the magnetic controlled power generator. 
     Further, the shaft has a C-buckle fixed at a rear end of the shaft and abutted to the second bearing. A one-way clutch bearing is arranged between the hub and the transmission element. 
     Further, the slide has a plurality of rollers pivotally connected between the two frames; the plurality of rollers is symmetrically located at the top to the bottom of both sides of the slide; the pull ropes respectively circles around the rollers and passes through a side of the slide to connect to the positioning groove. The adjustment block has an inclined face at an upper surface thereof; the inclined face is parallel to the positioning groove. The pivot has a bush thereon. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded perspective view of the preferred embodiment in accordance with the present invention; 
         FIG. 2  is an assembly perspective view of the preferred embodiment in accordance with the present invention; 
         FIG. 3  is an exploded perspective view of the preferred embodiment in accordance with the present invention from another angle; 
         FIG. 4  is an exploded perspective view of the flywheel device and magnetic controlled loading device in accordance with the present invention; 
         FIG. 5  is an assembly perspective view of the flywheel device and magnetic controlled loading device in accordance with the present invention; 
         FIG. 6A  is a cross-section view taken along the line  6 A- 6 A in  FIG. 4 ; 
         FIG. 6B  is a cross-section view taken along the line  6 B- 6 B in  FIG. 5 ; 
         FIG. 7  is an application example of the adjustment block moving upward in the slide in accordance with the present invention; and 
         FIG. 8  is an application example of the adjustment block moving downward in the slide in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIGS. 1 through 8 , the preferred embodiment of a magnetic controlled power generator in accordance with the present invention comprises the following components as discussed in detail below. 
     A flywheel device  10  having a first bearing  12  disposed within a hub  11  of the flywheel device  10 , the flywheel device  10  being recessed under a wheel rim  13 , which forms an accommodating space  14 , a metal conductor  15  being mounted on an inner surface of the wheel rim  13 ; a magnetic controlled loading device  20  arranged within the accommodating space  14  of the flywheel device  10  to form a magnetic controlled power generator  30 . The above features are disclosed in prior art and thus will not be described in details here. 
     The present invention is characterized in that the flywheel device  10  includes an annular body  16  being arranged within the accommodating space  14  and being concentric with an axis of the hub  11  to form an inner annular groove  141  and outer annular groove  142  within the accommodating space  14 , the annular body  16  has a first magnet  161  at an inner side thereof, a transmission element  17  is arranged at an outer side of the flywheel device  10  to drive the flywheel device  10  for rotation, and the transmission element  17  has at least a second bearing  171  inserted therein 
     The magnetic controlled loading device  20  includes a coil holder  22 ; a shaft  21  penetrating through the coil holder  22 ; an armature core  23  mounted to a rear side of the coil holder  22 ; a rear frame  24  having a groove  241  opposing to the armature core  23  in the center of a shaft hole for arranging the armature core  23 , the armature core  23  being fitted in the inner annular groove  141  of the accommodating space  14  for the rotation of the first magnet  161  of the annular body  16  corresponding to the electricity generation of the fixed armature core  23 , the groove  241  having a first positioning hole  242  in the center corresponding to a front side of the coil holder  22  thereof; a pair of pole pieces  25  being opposite facing circular shapes and having a pair of second magnets  251  arranged on an outer side  10  thereof and a compression spring  252  fitted to an inner side thereof, the pole pieces  25  each further having an end swiveled in a pivot  253  and a movable free end  254 , the pivot  253  of the pole pieces  25  being diagonally positioned on the rear frame  24 , a pull rope  255  being joined to the free end  254 ; a front frame  26  adapted to match the rear frame  24 , the front frame  26  having a second positioning hole  261  corresponding to the first positioning hole  242 , the front frame  26  being joined to the rear frame  24  and the coil holder  22  with a plurality of screws  262 ,  263  so that the pole pieces  25  are located between the two frames  24 ,  26  and fitted in the outer annular groove  142  of the accommodating space  14 ; a slide  27  and a stepped surface  271  being arranged near the pull rope  255  between the two frames  24 ,  26 , the slide  27  being radially located on a top of the stepped surface  271 ; an adjustment block  28  being arranged within the slide  27  for radial displacement, the adjustment block  28  having two positioning grooves  281  facing to the corresponding pull ropes  255  at the free ends  254  of the pole pieces  25  and formed at both sides of the adjustment block  28  for the pull ropes  255  respectively passing through both sides of the slide  27  to the two positioning grooves  281 ; an adjusting drive mechanism  29  passing through the stepped surface  271  to connect a lower end of the adjustment block  28 , which is selectable to use an electric or a manual adjustment method to drive the adjustment block  28  for a radial sliding movement. 
     With the references to  FIGS. 4 ,  5 ,  6 A and  6 B, the shaft  21  of the magnetic controlled loading device  20  joints to the hub  11  of the flywheel device  10  to form the magnetic controlled power generator  30 . In the embodiment, the shaft  21  has a C-buckle  221  fixed at a rear end of the shaft  21  and abutted to the second bearing  171 , but it is not a limitation. Further, the present invention further comprises a one-way clutch bearing  18  arranged between the hub  11  and the transmission element  17 . 
     With the references to  FIGS. 7 and 8 , the adjustment block  28  is moved up and down in the slide  27 . The slide  27  has a plurality of rollers  272  pivotally connected between the two frames  24 ,  26 , and the plurality of rollers  272  is symmetrically located at the top to the bottom of both sides of the slide  27 . The pull ropes  255  respectively circles around the rollers  272  and passes through a side of the slide  27  to connect to the positioning groove  281 . The adjustment block  28  has an inclined face  282  at an upper surface thereof, and the inclined face  282  is parallel to the positioning groove  281 . Further, the pivot  253  has a bush  256  thereon. Furthermore, a control cable R is connected to the adjusting drive mechanism  29  to move the adjustment block  28  up and down. 
     In the embodiment, when the flywheel device  10  turns, the power is supplied to the adjusting drive mechanism  29  to drive the adjustment block  28  for radial displacement in the slide  27 . When the adjustment block  28  moves up or down, the left and right pull ropes  255  allows the free end  254  of the pole pieces  25  to swivel on the pivots  253 . As a result, the air gap D between the second magnets  251  and the metal conductor  15  is adjustable to permit the change of the magnetic flux density. In this way, the goal of automatic and continuous adjustment of the loading resistance can be achieved. 
     Based on the features disclosed, the present invention has following effects: 
     1. Through the design, each component is effectively disposed in the limited space to form two independent modules for easy assembly and disassembly; such that, the manufacturing and maintenance of sports equipment become more convenient. 
     2. The adjusting drive mechanism  29  drives the adjustment block  28  for radial displacement in the slide  27  to adjust the air gap D to complete the load adjustment by magnetic control, improving the accuracy of magnetic control on the load adjustment and achieving computerization and digitization. 
     Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.