JP2017047485A - Shaft attaching member removing auxiliary tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft attaching member removing auxiliary tool capable of preventing rotations of a removing tool itself to a shaft and easily carrying out work by being used with a shaft attaching member removing tool having the same structure as a conventional and known pulley removing tool.SOLUTION: An auxiliary tool 30 is used together with a shaft attaching member removing tool 10 which is equipped with a screw shaft 12 having a male screw on an outer peripheral surface, a supporting member 14 having a female screw portion screwed with the male screw, and a pair of pulling arms 18 respectively and rotatably coupled to both end portions of the supporting member 14 through a pair of links 16, and having locking claws 20 at tip ends. The auxiliary tool 30 has a fixed portion 32 fixed while being held between an end portion of an attaching shaft 5 attached with a shaft attaching member 1 and an end portion of the screw shaft 12; and retaining portions 34a, 34b, 36a, and 36b extending to positions capable of abutting on side surfaces of the pair of the pulling arms 18 from the fixed portion 32.SELECTED DRAWING: Figure 5

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 and arranged near the end of the mounting shaft, the claw at each end of the pair of clamping arms in the state where the pressing support portion of the screw rod is in contact with the tip surface of the mounting shaft Hook on the peripheral edge of the axial end face. 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 mounting shaft.

Utility Model Registration No. 3160459

  The pulley removing tool described in Patent Document 1 can also be used to pull out a bearing disposed in the vicinity of the end of the mounting 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 mounting shaft, when trying to turn the screw rod with the claws of the pair of clamping arms hooked on the outer ring, The pair of sandwiching arms and the support portion together with the outer ring of the bearing rotate with respect to the mounting shaft, 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 mounting shaft by using it with a shaft mounting member punching tool having a configuration equivalent to a conventionally known pulley pulling 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. Auxiliary tools used together with a tool for removing a shaft mounting member, each having a pair of tension arms connected to each other in a pivotable manner and having a locking claw at each tip. A fixing portion fixed in a state of being sandwiched between an end portion of the mounting shaft and the end portion of the screw shaft, and a position where the fixing portion can contact at least one side surface of the pair of tension arms And a holding part extending to the end.

  The auxiliary | assistant tool for shaft attachment member extraction tools which concerns on this invention WHEREIN: The recessed part which positions the edge part of the said screw shaft may be formed in the said fixing | fixed part.

  Moreover, the auxiliary | assistant tool for shaft attachment member extraction tools which concerns on this invention WHEREIN: The said press part may be formed of a pair of extension part which opposes the both sides | surfaces of the said tension arm.

  Further, in the auxiliary tool for a shaft attachment member pulling tool according to the present invention, the pressing portion includes a first pressing portion capable of contacting one of the pair of tension arms and a second pressing portion capable of contacting the other. The first pressing portion may face one side surface of the one tension arm, and the second pressing portion may face the other side surface of the other tension arm.

  Further, in the auxiliary tool for a shaft attachment member pulling tool according to the present invention, the fixing portion may be a cylindrical shape or a columnar shape, and the pressing portion may be a rod-like member extending from the outer peripheral surface of the fixing portion.

  In this case, the fixing portion includes a main body portion to which the pressing portion is fixed, and an adapter detachably attached to the main body portion, and the shaft attachment member is attached to the adapter. A recess having a diameter capable of receiving the tip of the mounting shaft may be formed.

  According to the auxiliary tool for a shaft attachment member removing tool according to the present invention, the operator can fix the auxiliary tool between the end of the attachment shaft to which the shaft attachment member is attached and the end of the screw shaft of the extraction tool. If the extraction tool is installed in a state where the screw is clamped and the screw shaft is rotated with a spanner or the like, the auxiliary tool is clamped and fixed between the two end portions, and the pressing portions extending from the two abutments are brought into contact with each other. Are prevented from rotating with respect to the mounting shaft. Thereby, shaft attachment members, such as a bearing arrange | positioned in the state fixed to the attachment shaft, can be pulled out easily. Therefore, for example, even in a narrow work space such as a machine room of an escalator, one part of maintenance staff can efficiently perform part replacement work, and 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 perspective view which shows a mode when using the auxiliary tool shown in FIG. 3 with a shaft attachment member extraction tool. It is a side view which shows the use condition of the shaft attachment member extraction tool and auxiliary tool which were shown in FIG. It is a perspective view which shows the auxiliary tool of a 1st modification. It is a perspective view which shows the auxiliary tool of a 2nd modification. It is a perspective view which shows the auxiliary tool of a 3rd modification. It is a perspective view which shows the auxiliary tool of a 4th modification. (A) is a perspective view which shows the auxiliary tool of a 5th modification, (b) is the EE sectional view taken on the line in (a).

  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 distal end surface of the mounting shaft 5 (see FIG. 2) to which a bearing or the like is mounted when performing work using the punching tool 10. The pressing portion 24 may have a flat tip end surface, or may be configured to receive the mounting shaft 5 in a bottomed cylindrical shape.

  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 mounted by pressing the inner ring 2 into the outer periphery of the mounting shaft 5. Further, the inner ring 2 of the bearing 1 may be fixed to the outer peripheral surface of the mounting shaft 5 due to the influence of rust or the like. The mounting shaft 5 is a part of an output shaft of a motor (not shown), and the mounting shaft 5 is prevented from rotating 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 mounting 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 end of the mounting 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 mounting 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 pivotally 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 attached to the mounting shaft. Pulled out from 5.

  However, as described above, the mounting shaft 5 is not rotatable, but the outer ring 3 of the bearing 1 is rotatable with respect to the mounting shaft 5. Therefore, when the screw shaft 12 is rotated in the direction of 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 rotates in the D 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 a fixing part 32 and pressing parts 34a, 34b, 36a, 36b.

  The auxiliary tool 30 is constituted by a metal plate having an appropriate strength and thickness, for example. The fixing portion 32 of the auxiliary tool 30 is a portion that is sandwiched and fixed between the end portion of the screw shaft 12 and the end portion of the mounting shaft 5 of the bearing 1 when used with the punching tool 10. The fixing portion 32 of the auxiliary tool 30 is a substantially rectangular metal plate portion. A concave portion 33 for positioning the end portion of the screw shaft 12 may be formed in the central portion of the fixing portion 32 as indicated by a broken line. By forming the concave portion 33 in this manner, the auxiliary tool 30 is less likely to be displaced from the screw shaft 12, and the usability is improved.

  The pressing portion of the auxiliary tool 30 is configured by a pair of extending portions 34 a and 34 b extending from the fixing portion 32 to one side and a pair of extending portions 36 a and 36 b extending from the fixing portion 32 to the other side. . Notches 35 and 37 are formed between the pair of extending portions 34a, 34b, 36a, and 36b, respectively, and the assisting device 30 as a whole is substantially H-shaped. Thus, by arranging the tension arms 18 so as to sandwich the pair of extending portions 34a, 34b, 36a, 36b, there is an advantage that the auxiliary tool 30 is detached from the punching tool 10 and hardly falls off. .

  Then, with reference to FIG. 4 and FIG. 5, the usage method of the auxiliary tool 30 of this embodiment is demonstrated. FIG. 4 is a perspective view showing a state when the auxiliary tool 30 shown in FIG. 3 is used together with the shaft attachment member removing tool 10. FIG. 5 is a side view showing a usage state of the shaft attaching member removing tool 10 and the auxiliary tool 30 shown in FIG. 4.

  As shown in FIGS. 4 and 5, an auxiliary tool 30 is provided between the pressing portion 24 that is the tip of the screw shaft 12 of the punching tool 10 and the tip of the end of the mounting shaft 5 to which the bearing 1 is attached. The punching tool 10 and the auxiliary tool 30 are installed so that the fixed portion 32 is sandwiched. In this state, the screw shaft 12 is rotated to adjust the position of the support member 14 so that the locking claws 20 of the tension arms 18 are locked to the outer ring 3 of the bearing 1. At this time, one tension arm 18 is inserted into the notch 35 between one pair of extending portions 34a, 34b of the auxiliary tool 30, and the notch 37 between the other pair of extending portions 36a, 36b is inserted. The other tension arm 18 is inserted.

  In this state, the operator engages the tool engaging portion 22 with a spanner, a wrench or the like and rotates the screw shaft 12 in the direction of arrow C. If it does so, the fixing | fixed part 32 of the auxiliary tool 30 will be clamped and fixed between the press part 24 of the screw shaft 12, and the attachment axis | shaft 5, As a result, the auxiliary tool 30 will be fixed non-rotatably.

  Then, when the screw shaft 12 is continuously rotated, as described above with reference to FIG. 2, the entire punching tool 10 including the pair of tension arms 18 tries to rotate with each other. Since the pair of extending portions 34a, 34b, 36a, 36b are opposed to each other, the pulling tool 10 including the pair of pulling arms 18 is attached as a result of each pulling arm 18 coming into contact with the extending portions 34a, 36a. There is no rotation with respect 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 mounting shaft 5.

  As described above, according to the auxiliary tool 30 of the present embodiment, the operator holds the screw shaft 12 with the spanner while the fixing portion 32 of the auxiliary tool 30 is sandwiched and fixed between the screw shaft 12 and the mounting shaft 5. When the rotating tool is rotated by the above-described method, it is possible to reliably prevent the extraction tool 10 itself from rotating with respect to the mounting shaft 5 by the extension portions 34 a and 36 a of the auxiliary tool 30 coming into contact with the respective tension arms 18. Therefore, the bearing 1 press-fitted on the mounting 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.

  With reference to FIG. 5 thru | or FIG. 10, the modification of an auxiliary tool is demonstrated. In the following, the same or similar components as those in the above-described embodiment will be denoted by the same or similar reference numerals, and overlapping description will not be given, and different points will be mainly described.

  FIG. 6 is a perspective view showing an auxiliary tool 30a of a first modification. As for this auxiliary tool 30a, the fixing | fixed part 32a is formed in the substantially U shape. Other configurations are the same as those of the auxiliary tool 30. By forming the fixing portion 32a in this way, each of the pair of extending portions 34a, 34b, 36a, 36b can come into contact with the pair of tension arms 18 at a position further away from the screw shaft 12. Thus, the rotation prevention effect of 10 can be obtained more reliably.

  FIG. 7 is a perspective view showing an auxiliary tool 30b of a second modified example. The auxiliary tool 30b includes a first pressing portion 34a capable of contacting one of the pair of tension arms 18, and a second pressing portion 36a capable of contacting the other, and the extending portion 34b of the auxiliary tool 30. , 36b is omitted. When used with the punching tool 10, the first pressing portion 34 a faces one side surface of the one tension arm 18, and the second pressing portion 36 a faces the other side surface of the other tension arm 18. Also by this, when rotating the screw shaft 12 in the tightening direction (arrow C direction in FIG. 5), each tension arm 18 comes into contact with the first and second pressing portions 34a and 34b, and the punching tool 10 is rotated. Be blocked. Therefore, the same effect as the assisting tool 10 can be obtained. Moreover, compared with the auxiliary tool 30, there exists an advantage which becomes lightweight and becomes easy to carry.

  FIG. 8 is a perspective view showing an auxiliary tool 30c of a third modification. In this auxiliary tool 30c, the fixing portion 32c has a cylindrical shape, and the first and second pressing portions 34c and 36c are configured by a single metal round bar penetrating in a direction orthogonal to the axial direction of the fixing portion 32c. Has been. Further, one end of the fixed portion 32c that comes into contact with the mounting shaft 5 is formed as a stepped small diameter portion 38. However, the small diameter portion 38 may be omitted, and the entire fixing portion 32c may be formed with the same diameter. Even with the auxiliary tool 30c configured as described above, the first and second pressing portions 34c and 36c achieve the same effects as the auxiliary tool 30b of the second modified example.

  FIG. 9 is a perspective view of an auxiliary tool 30d according to a fourth modification. In this auxiliary tool 30d, the fixing portion 32d has a columnar shape, and a concave portion 33 is formed on the upper surface to be positioned by fitting the pressing portion 24 of the screw shaft 12. One end of the fixed portion 32d that is in contact with the mounting shaft 5 is formed as a small diameter portion 38 with a step. However, the small diameter portion 38 may be omitted, and the entire fixing portion 32d may be formed with the same diameter. Even with the auxiliary tool 30d configured as described above, the first and second pressing portions 34c and 36c achieve the same effects as the auxiliary tool 30b of the second modified example.

  Fig.10 (a) is a perspective view which shows the auxiliary tool 30e of a 5th modification, (b) is the EE sectional view taken on the line in (a). As shown in FIG. 10 (a), the fixing portion 32e of the auxiliary tool 30e is formed in a columnar shape, and the positioning concave portion 33 is formed on the upper surface. It is the same.

  On the other hand, in the auxiliary tool 30e, only one pressing portion 34c corresponding to the first pressing portion extends from the outer peripheral surface of the fixing portion 32e. In this way, even with only one pressing portion 34c, the function of preventing rotation of the punching tool 10 can be achieved by abutting against one of the pair of tension arms 18.

  As shown in FIG. 10B, the auxiliary tool 30e is an adapter 44 that can be attached to and detached from the main body portion 40 of the fixing portion 32e with a screw 42. The adapter 44 has an end surface for positioning an attachment shaft having a diameter d. A recess 46 is formed. Since the adapter 44 is detachable as described above, it can be replaced with the adapter 44 having the recess 46 having a different diameter d. As a result, the mounting shaft 5 having a different diameter can be received and Increased versatility.

  In addition, this invention is not limited to the said embodiment and its modification, A various improvement and change are possible in the matter described in the claim of this application, and its equivalent range.

  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, 30a, 30b, 30c, 30d, 30e Auxiliary tool, 32, 32a, 32b, 32c, 32d, 32e Fixed part, 33, 46 Recessed part, 34a, 34b, 34c, 36a, 36b, 36c Holding part or extending part, 35, 37 Notch part, 38 Small diameter part, 40 Body part, 42 Screw, 44 Adapter.

Claims (6)

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,
A fixing portion fixed in a state of being sandwiched between an end portion of the mounting shaft to which the shaft mounting member is attached and an end portion of the screw shaft; and at least one side surface of the pair of tension arms from the fixing portion An auxiliary tool for a tool for removing a shaft mounting member, which has a pressing portion extending to a position where the contact can be made. In the auxiliary tool for a shaft attachment member extraction tool according to claim 1,
An auxiliary tool for a tool for removing a shaft attachment member, wherein the fixing portion is formed with a recess for positioning an end of the screw shaft. In the auxiliary tool for shaft attachment member extraction tools according to claim 1 or 2,
The auxiliary member for a tool for removing a shaft attachment member, wherein the pressing portion is formed by a pair of extending portions facing both side surfaces of the tension arm. In the auxiliary tool for shaft attachment member extraction tools according to claim 1 or 2,
The pressing portion includes a first pressing portion that can be in contact with one of the pair of tension arms, and a second pressing portion that can be in contact with the other. An auxiliary tool for a tool for removing a shaft attachment member, which faces one side surface and the second pressing portion faces the other side surface of the other tension arm. In the auxiliary tool for shaft attachment member extraction tools as described in any one of Claims 1-4,
The auxiliary tool for a tool for removing a shaft mounting member, wherein the fixing part is cylindrical or columnar, and the pressing part is a rod-like member extending from the outer peripheral surface of the fixing part. In the auxiliary tool for a shaft attachment member extraction tool according to claim 5,
The fixing portion includes a main body portion to which the pressing portion is fixed, and an adapter that is detachably attached to the main body portion, and the adapter of the attachment shaft to which the shaft attachment member is attached. An auxiliary tool for a tool for removing a shaft attachment member, wherein a recess having a diameter capable of receiving a tip is formed.

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