Abstract:
A bearing installing and removing tool includes a driving unit and a link unit, wherein the driving unit has a threaded rod on which an adjusting member of a connection frame is threadedly mounted. The connection frame has a guide rail and a pivotable portion so as to be connected with different types of pull assemblies or link units to have different functions. A pull unit may be connected with the threaded rod so as to remove a bearing located in a tubular shaft. A connection unit may be connected with the threaded rod and includes a connection piece with a bowl-shaped space so as to be connected with a bowl-shaped head of a bolt such that the bolt provides an adjusting function to mount a bearing to a shaft whole improve poor eccentricity between the bearing and the shaft is existed.

Description:
FIELD OF THE INVENTION 
   The present invention relates to a bearing installing and removing tool which is able to install a bearing to a shaft or to remove a bearing from a shat by selective parts. 
   BACKGROUND OF THE INVENTION 
   A conventional bearing installing tool  9  is shown in  FIG. 10  and generally includes a threaded rod  91  having a driving end  911  at a first end thereof and a driving unit  93  is threadedly mounted to the threaded rod  91  so as to drive a connection member  92 . The connection member  92  has a plurality of push rods  94 . A spring  95  is mounted to the threaded rod  91  and located at a second end of the threaded rod  91 , the spring  95  pushes the connection member  92  back to its original position. A connection unit  96  is connected to the second end of the threaded rod  91  so as to be connected with a shaft  97 . When operation, the user rotates the driving end  911  to move the connection member  92  toward the shaft  97  and the push rods  94  push a bearing  98  to be installed on the shaft  97  so that the bearing  98  is forced to be mounted on the shaft  97 . However, this requires the driving unit  93  to have a longer force arm which is not allowed to be operated in a narrow space. 
     FIGS. 11 and 12  shows another bearing installing tool  8  which includes a threaded rod unit  81  which is driven by a hydraulic driving device and the threaded rod unit  81  includes an extension rod  811  which extends by the hydraulic driving device. A tube  82  with a plurality of slots  821  is connected to the threaded rod unit  81  and the tube  82  has a threaded hole  822  in an underside thereof so as to be connected with a bolt  84  which is removably connected with a connection member  83  and the connection member  83  is fixed on a shaft  85 . A slidable frame  86  is slidably engaged with the tube  82  and includes extensions  862  which are movably engaged with the slots  821 . The slidable frame  86  includes a through hole  861  in which the extension rod  811  extends and a spring  88  is located between an inner end of the tube  82  and the slidable frame  86 . Each of the extensions  862  is connected with a push rods  87  which can be connected with a link  871  to increase the length thereof when needed. A locking ring  89  is mounted to a top of the tube  82 . 
   When in use, the connection member  83  is connected to the shaft  85  and the tube  82  is connected to the connection member  83  by the bolt  84 . The pushrods  87  are located around the shaft  85  and in contact with the bearing  851  so that when the extension rod  811  extends from the threaded rod  81 , the bearing  851  are mounted to the shaft  85 . However, the bearing installing tool can only be used to install the bearing to the shaft. 
   When removing a bearing from a shaft, a bearing removing tool  7  is needed which is disclosed in  FIG. 13  and includes a threaded rod  71  with a driving end  711  at first end thereof and the threaded rod  71  extends through a tube  73  which has a plurality of arms  731 . A wing nut  72  is threadedly mounted to the threaded rod  71 . A connection frame  74  is connected to the threaded rod  71  and includes connection rods  741  which are located alternatively to the arms  731 . Each connection rod  71  has a pivotable portion  742  which is pivotably connected to an end of a claw  75 . A movable frame  76  is connected to the tube  73  and located away from the wing nut  72 . A plurality of support arms  77  extend from the movable frame  76  and a link  78  is pivotably connected between each support arm  77  and a mediate portion of the claw  75 . The movable frame  76  has a through hole  761  through which the threaded rod  71  extends. 
   When in use, the wing nut  72  is rotated counter clockwise to move the tube  73  upward such that the movable frame  76  is moved upward to let the claws  75  hook the bearing which is not shown. The threaded rod  71  is then rotated to move downward to push the bearing off from the shaft. 
   The user has to prepare a bearing installing tool and a bearing removing tool, in other words, no such a tool that can install and remove the bearing. Besides, when the center point of the shaft is not correctly drilled, the bearing cannot be precisely connected to the shaft and this may need several times of try to mount the bearing to the shaft. 
   The present invention intends to provide a bearing installing and removing tool which is equipped with different parts to install or remove a bearing from a shaft. 
   SUMMARY OF THE INVENTION 
   The present invention relates to a bearing installing and removing tool comprises a driving unit having a threaded rod and a tube is mounted to the threaded rod. A locking nut is received in a recess defined in a top of the tube and the threaded rod threadedly extends through the threaded passage in the locking nut and a central hole in the tube. The tube has a plurality of extension arms extending in a direction away from the locking nut and each extension arm has an aperture defined in a distal end thereof so as to be connected with a link unit. 
   A connection frame is connected to an underside of the tube and has a through hole through which the threaded rod extends. A threaded hole is defined in an inner periphery of the through hole and an inner diameter of the threaded hole is larger than an inner diameter of the through hole. A plurality of legs extend radially outward from the connection frame and extend through gaps between the extension arms. Each leg has a guide rail to which the link unit is connected. Each leg has a pivotable portion at a distal end thereof so as to be connected with the link unit. 
   An adjusting member is located beneath the connection frame and has a threaded hole so that the threaded rod threadedly extends through the threaded hole. The adjusting member has outer threads so as to be connected with the threaded hole of the connection frame. 
   The primary object of the present invention is to provide a bearing installing and removing tool that is able to install a bearing to a shaft and to remove a bearing from a shaft with a replaceable unit link. 
   The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view to show the bearing installing and removing tool with the link unit of the present invention; 
       FIG. 2  is an exploded view to show the bearing installing and removing tool with the link unit of the present invention; 
       FIG. 3  shows that the bowl-shaped head of the bolt can be slightly adjusted in the bowl-shaped space of the connection piece; 
       FIG. 4  is a cross sectional view to show a bearing is to be mounted to a shaft by the bearing installing and removing tool with the link unit of the present invention; 
       FIG. 5  shows a pull unit of the present invention; 
       FIG. 6  shows the pull unit is connected with the tool to pull a bearing in an inner periphery of a tubular shaft; 
       FIG. 7  is a perspective view to show a pull assembly is connected to the tool of the present invention; 
       FIG. 8  is an exploded view to show the pull assembly and the tool of the present invention; 
       FIG. 9  shows that the pull assembly is used to pull a bearing from a shaft; 
       FIG. 10  shows a conventional bearing installing tool; 
       FIG. 11  shows another conventional bearing installing tool; 
       FIG. 12  shows the conventional bearing installing tool in  FIG. 11  is used to mount a bearing to a shaft, and 
       FIG. 13  shows a conventional bearing removing tool. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
   Referring to  FIGS. 1 to 4 , the bearing installing and removing tool of the present invention comprises a driving unit  1 , a link unit  2  and a connection unit  3 , wherein the link unit  2  is an installing device. The driving unit  1  has a threaded rod  11  which has a driving end  111  at a first end thereof such that a tool can be used to rotate the threaded rod  11  at the driving end  111  which is hexagonal section in this embodiment. A tube  13  is mounted to the threaded rod  11  and has a recess  134  defined in a top thereof and a locking nut  15  is received in the recess  134 . The recess  134  includes a groove  135  defined in an inner periphery thereof so as to receive a C-clip  14  therein. A central hole  133  is defined through an inner end of the recess  134  and the locking nut  15  has a threaded passage  152 . The locking nut  15  has a hexagonal section  151  and threadedly extends through the threaded passage  152  and the central hole  133 . The tube  13  has a plurality of extension arms  131  extending in a direction away from the locking nut  15  and each extension arm  131  has an aperture  132  defined in a distal end thereof so as to be connected with a link unit  2 . A bearing  6  is located between the locking nut  15  and the inner end of the recess  134 . 
   A connection frame  12  is connected to an underside of the tube  13  and has a through hole  121  defined centrally therethrough so that the threaded rod  11  extends through the through hole  121 . A threaded hole  126  is defined in an inner periphery of the through hole  121  and an inner diameter of the threaded hole  126  is larger than an inner diameter of the through hole  121 . A plurality of legs  122  extend radially outward from the connection frame  12  and extend through gaps between the extension arms  131 . Each leg  122  has a guide rail  123  to which the link unit  2  is connected, and each leg  122  has a pivotable portion  124  at a distal end thereof so as to be connected with the link unit  2 . Each of the pivotable portions  214  has a slot  125  defined through an end thereof. 
   An adjusting member  17  is located beneath the connection frame  12  and has a threaded hole  173  so that the threaded rod  11  threadedly extends through the threaded hole  173 . The adjusting member  17  has outer threads  171  in a first end thereof so as to be connected with the threaded hole  126  of the connection frame  12 . A polygonal section  172  is connected to a second end of the adjusting member  17  for convenience of being cooperated with a tool. 
   Each link  22  of the link unit  2  includes two plates  21  and each plate  21  has a guide groove  211  with which the guide rail  123  of each leg  122  of the connection frame  12  is slidably engaged. Each plate  21  has a connection hole  212  and a bolt  26  extends through the two connection holes  212  of the two plates  21  and the link  22 . 
   Each link  22  of the link unit  2  includes a connection end  221  which is a rectangular section and located at a first end thereof and the connection end  221 . The connection end  221  has a transverse hole  222  so that the bolt  26  extends through the two respective connection holes  212  and the transverse hole  222 . Each link  22  of the link unit  2  has a bottom hole  223  defined axially in a second end thereof and a mediate member  23  is connected with the bottom hole  223 . 
   A first protrusion  231  and a second protrusion  232  extend from two opposite ends of each mediate member  23 , and the first protrusion  231  is engaged with the bottom hole  223  and the second protrusion  232  is connected with an extension link  24 . The extension link  24  includes an engaging hole  241  defined in a first end thereof and the second protrusion  232  is engaged with the engaging hole  241 . An end piece  25  is connected to a second end of the extension link  24 . The end piece  25  has a flat bottom. It is noted that the extension links  24  can be omitted and the end piece  25  can be directly connected to the bottom hole  223 . The end piece  25  has an axial length which can be used as the extension link  24 . 
   Further referring to  FIGS. 2 and 3 , a connection unit  3  is connected to a second end of the threaded rod  11  and includes a connection piece  31  a bolt  32 , the connection piece  31  has a threaded recess  311 . The bolt  32  has a threaded shank  322  and a bowl-shaped head  321  is connected to an end of the threaded shank  322 . The second end of the threaded rod  11  is threadedly engaged with the threaded recess  311 . A bowl-shaped space  312  is defined in the connection piece  31  and located beneath the threaded recess  311 . The bowl-shaped head  321  is received in the bowl-shaped space  312  and the threaded shank  322  extends through a central hole  313  defined through the connection piece  31 . The central hole  313  communicates with the bowl-shaped space  312  and the threaded recess  311 . The bowl-shaped head  321  is allowed to be pivotable in the bowl-shaped space  312  so that the threaded shank  322  of the bolt  32  can be positioned off the axial axis when needed. 
   As shown in  FIG. 4 , when in use, the connection unit  3  is first fixed to the threaded hole in a top of the shaft to which a bearing is to be mounted thereto. The threaded rod  11  is then rotated to connect the connection unit  3  and the links  22  of the link unit  2  are connected to the guide rails  123  of the connection frame  12  and are moved toward the shaft till the links  22  are located outside of the shaft. When installing the bearing, the adjusting member  17  is first rotated to move away from the threaded hole  126  of the connection frame  12  and the locking nut  15  is then rotated to move the tube  13  to push the link unit  2  which pushes the bearing to a desired portion on the shaft. 
   If the bearing is to be positioned to a lower position of the shaft, the first protrusion  231  of the mediate member  23  is engaged with the bottom hole  223  of the link  22 , and the second protrusion  232  of the mediate member  23  is engaged with the extension link  24 . The end piece  25  is connected to a lower end of the extension link  24  so as to send the bearing to a lower position. 
   As shown in  FIGS. 5 and 6  which show another embodiment, wherein a pull unit  4 A is connected to the second end of the threaded rod  11  and includes a connection nut  41 A which is connected between the threaded rod  11  and a push rod  42 A. A positioning member  43 A is connected to the push rod  42 A and two claws  44 A are connected to two ends of the positioning member  43  and each claw  44 A has a hook end  441 A. A bar  46 A is connected between the two claws  44 A. Two pivots  47  are connected to two ends of the bar  46  and connected to the two claws  44 A which are pivotable about the two pivots  47 A. The pull unit  4 A is used to remove a bearing “R” in an inner periphery of a tubular shaft. 
   The connection nut  41 A has a threaded inner periphery  411 A with which a second end of the threaded rod  11  is connected. The connection nut  41 A has a receiving space  412 A in which a head  421 A at one end of the push rod  42 A is retained. The push rod  42 A is rotatable relative to the connection nut  41 A so that when the connection nut  41 A moves, the push rod  42 A is moved toward the driving end  111  of the threaded rod  11 . 
   The push rod  42 A has a positioning member  43 A and each of the two ends of the positioning member  43 A includes a recess  431 A which is defined by two portions and each portion has an elongate slot  432 A. The two claws  44 A respectively extend through the two recesses  431 A and a bolt  45 A extends through the elongate slots  432 A and the claw  44 A in the recess  431 A so that the two claws  44 A are movable within a rage of the elongate slots  432 A. Each of the claws  44 A has a hook end  441 A. 
   As shown in  FIG. 6 , when removing the bearing “R” from the inner periphery of the shaft, the bolt  45 A is then loosened slightly to let the claws  44 A pivot about the pivots  47 A till the claws  44 A are inserted into the shaft to hook the bearing “R”. The adjusting member  17  is then moved upward to be fixed to the threaded hole  126  of the connection frame  12  which is not moved downward. The driving end  111  of the threaded rod  11  is then rotated counter clockwise to move the connection frame  12  to contact against the shaft so as to pull the bearing “R” out from the shaft. 
   As shown in  FIGS. 7 to 9 , the link unit  2  is replaced by the pull assembly  2 B, wherein the pull assembly  2 B includes a plurality of claws  21 B and each claw  21 B has a pivot hole  211 B at a first end thereof so that the pivotable portion  124  of the connection frame  12  is pivotably connected to the pivot hole  211 B by a bolt  27 . A hook end  212 B is formed at a second end of each claw  21 B and a mediate hole  213 B is defined in each claw  21 B and located between the pivot hole  211 B and the hook end  212 B. A movable frame  22 B is connected to a second end of the threaded rod  11  and located beneath the connection frame  12 . The movable frame  22 B has a through hole  221 B defined therethrough, a plurality of links  222 B extend radially outward from the movable frame  22 B and each of the links  222 B is shorter than a length of each of the legs  122  of the connection frame  12 . The movable frame  22 B has a plurality of threaded holes  224 B so that bolts  26  threadedly extend through the threaded holes  224 B and are connected to the apertures  132  of the extension arms  131  of the tube  13 . Each link  222 B has a pivotal portion  223 B defined in a distal end thereof so as to be pivotably connected with a connection plate  23  which is pivotably connected between the link  222 B and the mediate hole  213 B of the claw  21 B. 
   When disengaging the connection unit  3  and connecting the pull assembly  2 B to the tool, the adjusting member  17  is then moved upward to be fixed to the threaded hole  126  of the connection frame  12  which is not moved downward. The movable frame  22 B is connected to the connection frame  12  by bolts  26 . The connection plates  23 B are then connected to the pivotal portions  223 B of the movable frame  22 B at respective first ends thereof. The second end of each of the connection plates  23 B is then connected to the mediate hole  213 B of the claw  21 B corresponding thereto. The pivot hole  211 B of each claw  21 B is then pivotably connected to the pivotable portion  124  of the leg  122  corresponding thereto so as to install the pull assembly  2 B. The slot  125  of each leg  122  provides a sufficient space for the pivotal movement of the claw  21 B. 
   When removing the bearing from a shaft, the driving end  111  of the threaded rod  11  is rotated to move the second end of the threaded rod  11  to contact the end of the shaft, and the locking nut  15  is then rotated to move the tube  13  downward to let the connection frame  12  move relative to the movable frame  22 B to allow the claws  21 B to hook the bearing. 
   The locking nut  15  is then rotated reversely to move the tube  13  upward so that the connection frame  12  is moved relative to the movable frame  22 B again so that the claws  21 B securely clamp the bearing. The threaded rod  11  is then rotated clockwise to let the threaded rod  11  push the shaft and the bearing is then removed from the shaft. 
   Therefore, the connection unit  3  is used to install a bearing to a shaft, and the pull unit  4 A is used to remove a bearing from an inner periphery of a tubular shaft. The pull assembly  2 B is used to remove a bearing from a shaft. 
   While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.