JP6444282B2 - Tool for removing shaft mounting member - Google Patents

Description

  The present invention relates to an auxiliary tool used together with a tool for pulling out a shaft mounting member such as a bearing mounted with a shaft inserted.

  Conventionally, for example, Patent Document 1 below discloses a pulley removal tool. This pulley removal tool has one end pivotably connected to a support portion that meshes with a screw shaft of a screw rod provided with a head portion on the upper side and a pressure support portion on the lower side, and a central portion of the left and right arm pieces of the support portion. A pair of links and a holding arm with claws rotatably connected to the other end of the pair of links are provided.

  The pulley can be pulled out from the shaft as follows using the pulley removal tool disclosed in Patent Document 1. When pulling out the pulley inserted near the end of the shaft, the claw at each end of the pair of holding arms is in the pulley flange or axial direction with the pressing support of the screw rod in contact with the end surface of the shaft. Hang on the edge of the edge. In this state, when the head located above the screw rod is rotated by a tool such as a spanner or a wrench, the support portion engaged with the screw rod moves relative to the screw rod. As a result, the pair of sandwiching arms connected to the support portion via the pair of links exerts a pulling force on the pulley, and the pulley that is fixed by rust or the like can be pulled out from the shaft.

Utility Model Registration No. 3160459

  The pulley removal tool described in Patent Document 1 can also be used to pull out a bearing disposed near the end of the shaft. The method of using the pulley removing tool is the same as that of the pulley described above.

  However, since the bearing is configured so that the outer ring can rotate with respect to the inner ring press-fitted to the outer periphery of the shaft, if the screw rod is turned with the claws of the pair of holding arms hooked on the outer periphery of the outer ring, the bearing The pair of holding arms and the support portion also rotate together with the outer ring, and it is difficult to apply a tensile force to the bearing.

  An object of the present invention is to improve the workability by preventing rotation of the punching tool itself with respect to the shaft by using it together with a shaft mounting member punching tool having a configuration equivalent to a conventionally known pulley punching tool. It is to provide an auxiliary tool that can.

An auxiliary tool for a tool for removing a shaft attachment member according to the present invention includes a screw shaft having a male screw on an outer peripheral surface, a support member having a female screw portion screwed to the male screw, and a pair of links at both ends of the support member. An auxiliary tool used together with a tool for removing a shaft mounting member, each having a pair of tension arms connected to each other so as to be pivotable and having a locking claw at each tip, An engaging portion in which a notch for fitting along the axial direction of the screw shaft is formed, and one end of the engaging portion is fixed to the engaging portion so as to be substantially orthogonal to the axial direction and the support member. A pressing portion that extends along a side surface, and the engagement portion is formed of a bent metal plate, and a contact portion that is disposed along the side surface of the support member of the shaft attachment member removing tool; The notch is bent from the contact portion There and having a bent portion formed.

Moreover, the auxiliary tool for a tool for removing a shaft attachment member according to another aspect of the present invention includes a screw shaft having a male screw on an outer peripheral surface, a support member having a female screw portion screwed to the male screw, and both end portions of the support member. An auxiliary tool used together with a tool for removing a shaft attachment member, each of which is connected to a pair of links or directly pivotably, and has a pair of tension arms each having a locking claw at each tip, An engagement portion in which a notch for fitting the support member along the axial direction of the screw shaft is formed, and one end portion is fixed to the engagement portion in a direction substantially orthogonal to the axial direction. The engaging portion and the pressing portion are constituted by separate members assembled to each other, and the engaging portion has a boss portion through which the rod-shaped member constituting the pressing portion can be inserted. The pair of rod-like members Hook caught by the tension arm on one side may be formed of tension arm.

  In this case, it further includes a hook member that is hooked to the other tension arm of the pair of tension arms, and the hook member is inserted from the end opposite to the hook portion in the rod-shaped member constituting the pressing portion. A through hole may be formed. Here, the hook member may have a grip portion extending along an end opposite to the hook portion in the rod-shaped member constituting the pressing portion.

According to the auxiliary tool for a shaft attachment member pulling tool according to the present invention, an operator holds the pressing portion with one hand while the notch portion of the engaging portion is fitted into the support member of the shaft attachment member pulling tool. By rotating the screw shaft with the other hand using a spanner or the like, it is possible to reliably prevent the punching tool itself from rotating with respect to the shaft. Accordingly, the shaft mounting member such as a bearing is press-fitted arranged axially can be easily pulled out, be efficiently component replacement work in one of the maintenance staff in a narrow working space of the machine room, etc., for example escalator Yes. Therefore, workability is improved.

It is a perspective view which shows an example of a shaft attachment member extraction tool. It is a figure which shows a mode when pulling out a bearing from an axis | shaft using the shaft attachment member extraction tool shown in FIG. It is a perspective view which shows the auxiliary tool which is one Embodiment of this invention. It is a figure which shows a mode when using the auxiliary | assistant tool shown in FIG. 3 with the shaft attachment member extraction tool, and pulling out a bearing from a shaft. It is a side view shown in the state which decomposed | disassembled the auxiliary tool which is another embodiment. It is a figure which shows a mode when using the auxiliary tool shown in FIG. 5 with the shaft attachment member extraction tool.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations.

  FIG. 1 is a perspective view showing an example of a shaft attachment member punching tool (hereinafter, simply referred to as a “punching tool” as appropriate) 10. The punching tool 10 includes a screw shaft 12, a support member 14, a pair of links 16, and a pair of tension arms 18.

  The screw shaft 12 is a rod-shaped member having a female screw formed on the outer peripheral surface. At one end of the screw shaft 12, for example, a tool engaging portion 22 having a hexagonal shape or the like is provided. For example, a circular through hole 23 may be formed in the tool engaging portion 22. Accordingly, the screw shaft 12 can be rotated by inserting a round bar-like tool through the through hole 23.

  Further, the other end of the screw shaft 12 is provided with a cylindrical pressing portion 24. The pressing portion 24 is a portion that comes into contact with the tip surface of the shaft to which a bearing or the like is attached when the punching tool 10 is used for work. The pressing portion 24 may have a flat tip end surface, or may have a bottomed cylindrical shape and accept a thin shaft.

  The support member 14 has a female screw portion 15 at the center, and the screw shaft 12 is screwed to the female screw portion 15. As a result, when the screw shaft 12 is rotated in the tightening direction (clockwise as viewed from the tool engaging portion 22 side), the support member 14 moves relative to the screw shaft 12 in the direction of arrow A, and the screw shaft 12 is moved. The support member 14 is configured to move relative to the screw shaft 12 in the direction of arrow B when rotated in the loosening direction (counterclockwise as viewed from the tool engaging portion 22 side).

  One end of each of the pair of links 16 is rotatably connected by bolts and nuts 26 at both ends of the support member 14. Each link 16 is constituted by two link plates 16a and 16b, and is attached by bolts and nuts 26 with the support member 14 sandwiched from both sides.

  On the other hand, the other end portions of the pair of links 16 are rotatably connected to intermediate portions of the pair of tension arms 18 by bolts and nuts 28. Again, each link 16 is attached with the intermediate portion of the tension arm 18 sandwiched between the two link plates 16a, 16b.

  Each of the pair of tension arms 18 has a locking claw 20 that protrudes in a direction facing each other at the tip located on the lower side in FIG. Further, the locking claws 21 may be provided on the upper ends of the pair of tension arms 18. In this case, the locking claws 21 are formed so as to protrude in the opposite direction to the locking claws 20 at the lower ends protruding toward the inside, that is, toward the outside of the punching tool 10.

  The screw shaft 12 described above is formed by forging a metal round bar. The support member 14, the link plates 16a and 16b, and the tension arm 18 are made of, for example, cast iron parts.

  Next, with reference to FIG. 2, the usage method of the punching tool 10 mentioned above is demonstrated. FIG. 2 is a diagram illustrating a state in which the bearing is pulled out from the shaft using the shaft attachment member removing tool 10 illustrated in FIG. 1.

  As shown in FIG. 2, an example is shown in which the bearing 1 is a general ball bearing having an inner ring 2, an outer ring 3, and a ball 4. The bearing 1 is attached with the inner ring 2 being press-fitted into the outer periphery of the shaft 5. Further, the inner ring 2 of the bearing 1 may be fixed on the outer peripheral surface of the shaft 5 due to the influence of rust or the like. The shaft 5 is a part of an output shaft of a motor (not shown), and the shaft 5 does not rotate because a brake is applied to the motor when the bearing is replaced.

  When the bearing 1 fixed in the vicinity of the end of the shaft 5 is pulled out by the extraction tool 10 in this way, the pressing portion 24 at the tip of the screw shaft 12 is brought into contact with the tip surface of the shaft 5. In this state, the screw shaft 12 is rotated in an appropriate direction to adjust the position of the screw shaft 12 with respect to the support member 14. By this adjustment, the position of the support member 14 with respect to the screw shaft 12 is changed, so that the position of the tension arm is also changed via the link 16, and as a result, the locking claw 20 of the tension arm 18 is locked to the outer ring 3 of the bearing 1. It will be in the state. At this time, it is preferable that the screw shaft 12 and the shaft 5 of the bearing 1 are aligned in a substantially straight line.

  Then, the operator or maintenance staff engages a tool such as a spanner or a wrench with the tool engaging portion 22 of the screw shaft 12 and rotates it in the direction of arrow C. Then, if the punching tool 10 itself does not rotate, the relative position of the support member 14 with respect to the screw shaft 12 moves in the arrow A direction. As a result, the pair of tension arms 18 that are rotatably connected to the support member 14 via the pair of links 16 also move, whereby a tensile force acts on the bearing 1, and as a result, the bearing 1 is connected to the shaft 5. Pulled out from.

  However, as described above, the shaft 5 is not rotatable, but the outer ring 3 of the bearing 1 is rotatable with respect to the shaft 5. Therefore, when the screw shaft 12 is rotated in the direction of the arrow C, the entire punching tool 10 including the pair of tension arms 18 locked to the outer ring 3 of the bearing 1 by the torque is It will rotate in the direction. If it does so, the position of the screw shaft 12 with respect to the support member 14 will not change, and there was a problem that a tensile force could not be applied to the bearing 1.

  Therefore, in order to solve such a problem, in this embodiment, the auxiliary tool 30 shown in FIG.

  FIG. 3 is a perspective view showing the auxiliary tool 30 of the present embodiment. The auxiliary tool 30 includes an engagement portion 32 and a pressing portion 34.

  The engaging part 32 is constituted by, for example, a metal plate bent into a substantially L shape. When used with the punching tool 10, the engaging portion 32 includes a contact portion 36 disposed along the support member 14 and a bent portion 38 that is bent from the contact portion 36 at a substantially right angle. One end portion 34a of a rod-shaped member constituting the pressing portion 34 is fixed to the outer surface of the contact portion 36 of the engaging portion 32 by, for example, welding.

  A cutout 40 is formed in the bent portion 38 of the engaging portion 32. The notch 40 is a part for fitting the support member 14 along the axial direction of the screw shaft 12 when used with the punching tool 10. In the present embodiment, the cutout 40 is formed in a substantially rectangular shape having a width that can receive the support member 14.

  The holding | maintenance part 34 of the auxiliary tool 30 can be comprised with a metal round bar member, for example. The other end portion 34b opposite to the one end portion 34a to which the engaging portion 32 is fixed in the pressing portion 34 is a portion held and pressed by the operator. It is preferable to form an anti-slip structure (for example, a large number of annular grooves) for facilitating gripping at the other end 34b of the pressing portion 34.

  Then, with reference to FIG. 4, the usage method of the auxiliary tool 30 of this embodiment is demonstrated. FIG. 4 is a view showing a state where the bearing 1 is pulled out from the shaft 5 by using the auxiliary tool 30 shown in FIG.

  As shown in FIG. 4, in the state where the pressing portion 24 at the tip of the screw shaft 12 of the punching tool 10 is in contact with the tip surface of the shaft 5 to which the bearing 1 is attached, the locking claws 20 of the tension arms 18 are held. The engagement with the outer ring 3 of the bearing 1 is the same as described with reference to FIG.

  Then, the notch 40 formed in the engaging part 32 of the auxiliary tool 30 is fitted into the support member 14. At this time, the notch 40 of the engaging portion 32 can be fitted from above in FIG. 4 along the axial direction of the screw shaft 12. In this state, the pressing portion 34 of the auxiliary tool 30 extends in a direction substantially orthogonal to the screw shaft 12 of the punching tool 10.

  In this state, the operator or the like rotates the screw shaft 12 in the arrow C direction with a tool such as a spanner while holding the other end 34b of the holding portion 34 of the auxiliary tool 30 in the arrow E direction with the other hand. Let At this time, as described above with reference to FIG. 2, the entire punching tool 10 including the pair of tension arms 18 tries to rotate, but the abutting portion 36 of the engaging portion 32 is on the side surface of the support member 14 or on this side surface. And the presser 34 is pressed in the direction of arrow E, so that the punching tool 10 does not rotate relative to the shaft 5. Accordingly, the pair of tension arms 18 exerts a tensile force on the bearing 1 due to a change in the relative position of the support member 14 with respect to the screw shaft 12, and as a result, the bearing 1 is pulled out from the shaft 5.

  As described above, according to the assisting tool 30 of the present embodiment, the operator holds the pressing portion 34 with one hand in a state where the notch portion 40 of the engaging portion 32 is fitted into the support member 14 of the extraction tool 10. By rotating the screw shaft 12 with the other hand using a wrench or the like while pressing, it is possible to reliably prevent the extraction tool 10 itself from rotating with respect to the shaft 5. Therefore, the bearing 1 press-fitted on the shaft 5 can be easily pulled out. In particular, the auxiliary tool 30 of the present embodiment can be easily and efficiently replaced when one maintenance staff performs bearing replacement work in a narrow work space such as an escalator machine room. Improves.

  Next, with reference to FIG. 5 and FIG. 6, the auxiliary tool 31 which is another embodiment is demonstrated. FIG. 5 is a side view showing an exploded view of an auxiliary tool 31 according to another embodiment. FIG. 6 is a view showing a state when the auxiliary tool 31 shown in FIG. 5 is used together with the punching tool 10. Here, the same or similar components as those of the assisting tool 30 described above are denoted by the same or similar reference numerals, and description thereof will not be repeated, but mainly the differences will be described.

  As shown in FIG. 5, the auxiliary tool 31 is constituted by three separable members. Specifically, the auxiliary tool 31 is configured by combining an engaging member (engaging portion) 32 a, a pressing member (pressing portion) 34 made of a rod-shaped member, and a hook member 42.

  The engaging member 32a of the auxiliary tool 31 is formed, for example, by bending a metal plate. In the present embodiment, the engaging member 32 a has two L-shaped bent portions 38, and a cutout portion 40 is formed in each bent portion 38. In this way, the two notches 40 are formed, and the notches 40 are fitted and engaged with the support member 14 on both sides of the screw shaft 12 of the punching tool 10 so that the engagement member 32a of the support member 14 is engaged. The installation state can be made more stable.

  Further, the engaging member 32 a of the auxiliary tool 31 has a boss portion 33. The boss portion 33 is fixed to the metal plate, for example, by welding a metal pipe. As will be described later, the boss portion 33 can be assembled to the engaging member 32a by inserting the other end portion 34b of the pressing member 34.

  The pressing member 34 of the auxiliary tool 31 has a hook portion at one end 34a. As shown in FIG. 6, the width h of the hook portion is such that the hook 16 is hooked to the link 16 and the tension arm 18 located on one side of the punching tool 10 when the punching tool 10 is assembled to prevent rotation. Is formed. Except this, the pressing member 34 is the same as that of the auxiliary tool 30 described above.

  The hook member 42 of the auxiliary tool 31 includes a hook plate 44 formed by, for example, bending a metal plate into a substantially L shape. The hook plate 44 is formed with a through hole 46 through which the other end 34 b of the pressing member 34 is inserted. Further, for example, a metal rod-like grip 48 is fixed to the end of the hook plate 44 by welding or the like. The grip portion 48 is disposed so as to extend along the other end portion 34b when the other end portion 34b of the pressing member 34 located on the opposite side of the hook portion is inserted into the through hole 46 of the hook plate 44. ing. It is preferable to provide a non-slip structure on the outer periphery of the grip portion 48, similarly to the other end portion 34 b of the pressing member 34.

  Then, with reference to FIG. 5 and FIG. 6, the usage method of the auxiliary tool 31 is demonstrated. First, as shown in FIG. 5, the other end 34 b of the pressing member 34 is inserted into the boss 33 of the engaging member 32 a, and then the other end 34 b of the pressing member 34 is inserted into the through hole 46 of the hook member 42. Then, the auxiliary tool 31 is assembled.

  Then, as shown in FIG. 6, the two notches 40 of the engagement member 32 a are fitted into the support member 14 on both sides of the screw shaft 12 and engaged. At this time, it is preferable that the hook portion at the one end portion 34 a of the pressing member 34 and the hook member 42 are positioned so as not to interfere with the pair of tension arms 18 positioned on both sides of the punching tool 10.

  Thereafter, the pressing member 34 is slid within the boss portion 33 of the engaging member 32 a and moved to a position where the hook portion at the one end portion 34 a is hooked to the link 16 and the tension arm 18 on one side of the punching tool 10. Then, the hook member 42 is slid along the pressing member 34 and moved to a position where the hook plate 44 is caught by the link 16 and the tension arm 18 on the other side of the punching tool 10.

  After this state, the worker or the like grasps and presses the other end portion 34b of the pressing portion 34 and the grip portion 48 of the hook member 42 that extend in parallel with one hand. Then, an operator or the like rotates the screw shaft 12 of the extraction tool 10 with the other hand to perform the operation of extracting the bearing 1 from the shaft 5.

  Also with the assisting tool 31 in this embodiment, the same operational effects as those of the assisting tool 30 described above can be achieved. In addition, in the auxiliary tool 31, the two cutout portions 40 are fitted into the support member 14, and the end portions on both sides of the punching tool 10 can be held by the hook portion and the hook member 42 of the pressing member 34. Therefore, the punching tool 10 can be held so as not to rotate in a more stable state.

  In addition, although the said auxiliary tool 31 demonstrated the example comprised by three members, the engaging member 32a, the pressing member 34, and the hook member 42, it is not limited to this. For example, the hook member 42 may be omitted, and the auxiliary tool may be configured by two members, that is, the engaging member 32 a and the pressing member 34. Alternatively, in the auxiliary tool 31, the grip portion 48 of the hook member 42 may be omitted and only the hook plate 44 may be configured. Also by these, the operator can hold and hold the other end 34b of the pressing member 34 so that the entire punching tool 10 does not rotate.

  By the way, the present invention is not limited to the above-described embodiment and its modifications, and various improvements and modifications can be made within the matters described in the claims of the present application and the equivalent scope thereof.

  Although the punching tool 10 described above has been described as having a structure in which the support member 14 is rotatably connected to the pair of tension arms 18 via the pair of links 16, the punching tool to which the present invention can be applied is described. However, the present invention is not limited to this, and a configuration in which a pair of tension arms are directly connected to both ends of the support member so as to be rotatable is also possible.

  Moreover, in the above, although the case where an auxiliary tool was used with the tool for extracting a bearing from an axis | shaft was demonstrated, this invention is not limited to this. The shaft mounting member fixed to the shaft may be a pulley, a gear, or the like. In this case, when the shaft is rotatable, the removal tool itself rotates and the removal operation becomes difficult, so that the auxiliary tool of the present invention can be used effectively.

  1 Bearing, 2 Inner ring, 3 Outer ring, 4 Ball, 5 Axis, 10 Axis mounting member removal tool, 12 Screw shaft, 14 Support member, 15 Female thread, 16 Link, 16a, 16b Link plate, 18 Tension arm, 20, 21 Locking claw, 22 Tool engaging part, 23 Through hole, 24 Pressing part, 26, 28 Bolt / nut, 30, 31 Auxiliary tool, 32 Engaging part, 32a Engaging member, 33 Boss part, 34 Pressing part or pressing Member, 34a One end part, 34b Other end part, 36 Contact part, 38 Bending part, 40 Notch part, 42 Hook member, 44 Hook board, 46 Through hole, 48 Gripping part.

Claims (4)

A screw shaft having a male screw on the outer peripheral surface, a support member having a female screw part screwed to the male screw, and both ends of the support member are connected to each other via a pair of links or directly rotatable, and , An auxiliary tool used together with a shaft attachment member extraction tool comprising a pair of tension arms each having a locking claw at each tip,
An engaging portion in which a notch for fitting the supporting member along the axial direction of the screw shaft is formed, and one end of the engaging portion is fixed to the engaging portion in a direction substantially orthogonal to the axial direction . And a pressing portion extending along the side surface of the support member ,
The engaging portion is formed of a bent metal plate, and a contact portion disposed along a side surface of the support member of the shaft attachment member punching tool and a notch portion formed by bending from the contact portion. An auxiliary tool for a tool for removing a shaft attachment member , characterized by comprising a bent portion . A screw shaft having a male screw on the outer peripheral surface, a support member having a female screw part screwed to the male screw, and both ends of the support member are connected to each other via a pair of links or directly rotatable, and , An auxiliary tool used together with a shaft attachment member extraction tool comprising a pair of tension arms each having a locking claw at each tip,
An engagement portion in which a notch for fitting the support member along the axial direction of the screw shaft is formed, and one end portion is fixed to the engagement portion in a direction substantially orthogonal to the axial direction. A holding part that extends,
The engaging part and the pressing part are constituted by separate members assembled to each other, the engaging part has a boss part through which a bar-shaped member constituting the pressing part can be inserted, and the tip of the bar-shaped member has the above-mentioned An auxiliary tool for a tool for removing a shaft mounting member, wherein a hook portion is formed to be hooked on one of the pair of tension arms. In the auxiliary tool for shaft attachment member extraction tools according to claim 2 ,
It further includes a hook member that hooks to the other side of the pair of tension arms, and the hook member has a through-hole that is inserted from the end opposite to the hook portion in the rod-shaped member that constitutes the pressing portion. An auxiliary tool for a tool for removing a shaft attachment member, which is formed. In the auxiliary tool for a shaft attachment member extraction tool according to claim 3 ,
The hook member has a grip portion extending along an end opposite to the hook portion of the rod-shaped member constituting the pressing portion, and the auxiliary tool for the shaft attachment member removing tool.

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