Oil-seal removal jig

Abstract

This oil-seal removal tool comprises: a handle to be held by a worker; a blade part provided at the end of the handle to pierce an oil seal; and a fulcrum body projecting in a direction orthogonal to the longitudinal direction of the handle, and which, by being put on an attached part on which the oil seal is attached, functions as a fulcrum for rotating the handle.

Description

Oil seal removal jig

[0001] The present disclosure relates to an oil seal removal jig.

[0002] A conventional oil seal removal tool includes a tool body and a claw. The tool body is provided with a through hole and a fulcrum. The claw is fixed to the tool body. To remove the oil seal from the engine housing, an operator inserts an operating handle into the through hole of the tool body, brings the fulcrum into contact with the engine housing, hooks the tip of the claw onto the oil seal, and then rotates the operating handle around the fulcrum (see, for example, Patent Document 1).

[0003] Japanese Patent Application Laid-Open No. 2006-15473

[0004] In the conventional oil seal removal tool described above, when removing the oil seal, it is necessary to insert a special operating handle into the through hole of the tool body, which makes the operation time-consuming.

[0005] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide an oil seal removal jig that can more easily remove an oil seal.

[0006] The oil seal removal tool according to the present disclosure comprises a handle that is held by the operator, a blade portion that is provided at the tip of the handle and that is inserted into the oil seal, and a fulcrum body that is provided in the middle of the handle and that protrudes in a direction perpendicular to the longitudinal direction of the handle and that serves as a fulcrum when rotating the handle by being placed against the mounting portion on which the oil seal is attached.

[0007] According to the oil seal removal jig of the present disclosure, the oil seal can be removed more easily.

[0008] 1. A plan view showing the oil seal removal jig in Embodiment 1. 2. A side view showing the oil seal removal jig of FIG. 1. 3. A bottom view showing the oil seal removal jig of FIG. 1. 4. A front view showing the oil seal removal jig of FIG. 1. 5. A rear view showing the oil seal removal jig of FIG. 1. 6. A cross-sectional view showing the oil seal, shaft member, and attached portion in Embodiment 1. 7. An explanatory view showing the state when the blade portion of the oil seal removal jig of FIG. 1 is piercing the oil seal. 8. An explanatory view showing the state when the handle of the oil seal removal jig of FIG. 1 is being rotated. 9. A side view showing the state when the blade portion of the oil seal removal jig of FIG. 1 is lifted. 10. A side view showing the state when the fulcrum has been moved away from the blade portion from the state of FIG. 8. 11. A side view showing the state when the blade portion has been lifted from the state of FIG. 10. 12. A plan view showing the rotation of the handle with only the first blade piercing the oil seal. 13. A plan view showing the state when the blade piercing the oil seal is switched from the first blade to the second blade. 14. A plan view showing the rotation of the handle in the reverse direction from the state of FIG. 13. FIG. 10 is a side view showing the oil seal removal jig when another fulcrum body is attached.

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] Embodiment 1. Figure 1 is a plan view showing an oil seal removal jig in embodiment 1. Figure 2 is a side view showing the oil seal removal jig of Figure 1. Figure 3 is a bottom view showing the oil seal removal jig of Figure 1. Figure 4 is a front view showing the oil seal removal jig of Figure 1. Figure 5 is a rear view showing the oil seal removal jig of Figure 1. Figure 6 is a side view showing the oil seal, shaft member, and mounted portion in embodiment 1.

[0011] In FIG. 1, an oil seal removal jig 100 is used to remove an oil seal 300 shown in FIG. 6 from a mounted portion 400 along a shaft member 200.

[0012] Here, shaft member 200 is, for example, the main shaft of an elevator hoist (not shown). Mounted portion 400 is a part of the hoist that supports the main shaft. Oil seal 300 is mounted on mounted portion 400. Oil seal 300 is an annular member made of rubber that prevents lubricant applied inside the hoist from leaking out.

[0013] The oil seal removal jig 100 includes a handle 110 , a cutting edge 120 , a fulcrum 130 , and a protective member 140 .

[0014] The handle 110 is a member that is held by an operator. The blade 120 is provided at the tip of the handle 110. An end 111 of the handle 110 opposite the tip is chamfered.

[0015] The blade portion 120 is a portion that is pierced into the oil seal 300 and has a first blade 121 and a second blade 122 .

[0016] The first blade 121 protrudes from the tip of the handle 110 at an angle relative to the longitudinal direction of the handle 110. The second blade 122 protrudes from the tip of the handle 110 at an angle relative to the longitudinal direction of the handle 110 in a direction different from that of the first blade 121.

[0017] Fulcrum body 130 is provided at the middle of handle 110. Fulcrum body 130 protrudes in a direction perpendicular to the longitudinal direction of handle 110. As shown in Figure 2, the amount of protrusion of fulcrum body 130 from handle 110 is h1. Fulcrum body 130 abuts against attachment portion 400, thereby serving as a fulcrum when rotating handle 110.

[0018] The fulcrum body 130 has a fulcrum body main body portion 131 and a fastener 132. The fastener 132 fixes the position of the fulcrum body main body portion 131 relative to the handle 110. When the fastener 132 is loosened, the fulcrum body main body portion 131 becomes movable in the longitudinal direction of the handle 110.

[0019] In this way, the fulcrum body 130 is attached to the handle 110 so that its position in the longitudinal direction of the handle 110 can be adjusted.

[0020] The protective member 140 is a member that protects the blade portion 120. The protective member 140 is a rubber annular member that is fixed to the handle 110.

[0021] Furthermore, the protective member 140 is pressed against the oil seal 300 and elastically deformed before the cutting edge 120 comes into contact with the oil seal 300. Depending on the orientation of the oil seal removal jig 100, the protective member 140 may be pressed against the mounted portion 400 and elastically deformed.

[0022] Next, a first method of using the oil seal removal jig 100 will be described.

[0023] 7 is an explanatory diagram showing the state when the blade portion 120 of the oil seal removal jig 100 in FIG. 1 is piercing the oil seal 300. In the following description, the direction in which the oil seal 300 is removed will be referred to as a first direction, and the opposite direction will be referred to as a second direction.

[0024] First, the worker brings the tip of the cutting edge 120 into contact with the oil seal 300. Then, the end 111 is struck by the hammer 500, causing the cutting edge 120 to pierce the oil seal 300.

[0025] FIG. 8 is an explanatory diagram showing a state when the handle 110 of the oil seal removal jig 100 of FIG. 1 is rotated.

[0026] The operator places the bottom of the fulcrum body 130 against the attachment portion 400 and rotates the handle 110. This causes the cutting edge 120 to rise in the first direction, and the oil seal 300 is removed from the attachment portion 400.

[0027] Next, a second method of using the oil seal removal jig 100 will be described.

[0028] Fig. 9 is a side view showing the state when the blade portion 120 of the oil seal removal jig 100 in Fig. 1 is lifted in a first direction. Fig. 10 is a side view showing the state when the fulcrum body 130 is moved away from the blade portion 120 from the state in Fig. 9. Fig. 11 is a side view showing the state when the blade portion 120 is lifted in the first direction from the state in Fig. 10. Note that the oil seal 300 is not shown in Figs. 9 to 11.

[0029] 9, the operator inserts the cutting edge 120 into the oil seal 300 and rotates the handle 110 to lift the cutting edge 120 in the first direction. The lifted height at this time is designated as L1.

[0030] 10, the operator moves the position of the fulcrum 130 away from the blade portion 120 without removing the blade portion 120 from the oil seal 300. As a result, the end portion 111 side of the handle 110 is lifted in the first direction.

[0031] Next, the operator rotates the handle 110 to further lift the blade portion 120 in the first direction in Fig. 11. As a result, the blade portion 120 is lifted to a lift height L2 that is higher than the lift height L1.

[0032] In this way, by repeatedly performing the operation of lifting the blade portion 120 in the first direction and the operation of moving the position of the fulcrum body 130 away from the blade portion 120 , the oil seal 300 is gradually removed from the mounted portion 400 .

[0033] Next, a third method of using the oil seal removal jig 100 will be described.

[0034] Fig. 12 is a plan view showing that the handle 110 is rotated with only the first blade 121 piercing the oil seal 300. Fig. 13 is a plan view showing the state when the blade piercing the oil seal 300 is switched from the first blade 121 to the second blade 122. Fig. 14 is a plan view showing that the handle 110 is rotated in the reverse direction from the state shown in Fig. 13.

[0035] 12 , the worker pierces only the first cutting edge 121 into the oil seal 300, and then places the bottom of the fulcrum body 130 against the mounting portion 400. Then, the worker rotates the handle 110 around the longitudinal direction of the handle 110 as the axis of rotation so as to lift the first cutting edge 121 in the first direction. This rotation lifts the oil seal 300, using the fulcrum body 130 as a fulcrum.

[0036] 13 , the worker removes the first blade 121 from the oil seal 300 while piercing the second blade 122 into the oil seal 300. At this time, the worker pierces the second blade 122 at a position in the second direction from the position where the first blade 121 was pierced.

[0037] 14, the operator rotates the handle 110 in a direction that lifts the second blade 122 in the first direction. This rotation causes the oil seal 300 to be further lifted, with the fulcrum body 130 as the fulcrum.

[0038] This operation is repeated alternately for the first blade 121 and the second blade 122 , so that the oil seal 300 is gradually removed from the mount portion 400 .

[0039] Next, replacement of the fulcrum body 130 will be described.

[0040] 15 is a side view showing the oil seal removal jig 100 when another fulcrum body is attached. The fulcrum body 130 and the other fulcrum body 130a are each detachable from the end portion 111 of the handle 110. This allows the fulcrum body 130 to be replaced with the other fulcrum body 130a.

[0041] When the other fulcrum body 130a is attached to the handle 110, the amount of protrusion of the other fulcrum body 130a from the handle 110 is h2. The amount of protrusion h2 is different from the amount of protrusion h1. In the first embodiment, the amount of protrusion h2 is longer than the amount of protrusion h1.

[0042] In this way, the fulcrum body 130a can be replaced with another one having a different amount of protrusion from the handle 110, and the lifting height of the blade portion 120 can be changed.

[0043] The oil seal removal jig 100 of the first embodiment includes a cutting edge 120 and a fulcrum 130. The cutting edge 120 is provided at the tip of the handle 110 and is inserted into the oil seal 300. The fulcrum 130 is provided at the middle of the handle 110 and protrudes in a direction perpendicular to the longitudinal direction of the handle 110. The fulcrum 130 is brought into contact with the mounting portion 400 to which the oil seal 300 is attached, thereby serving as a fulcrum when the handle 110 is rotated.

[0044] Therefore, the oil seal removal jig 100 of the first embodiment makes it possible to remove the oil seal 300 more easily.

[0045] Furthermore, the fulcrum 130 is attached to the handle 110 so that its position in the longitudinal direction of the handle 110 can be adjusted. Therefore, the height to which the blade portion 120 is lifted when the handle 110 is rotated can be adjusted.

[0046] Furthermore, the blade portion 120 has a first blade 121 that protrudes from the tip of the handle 110 at an angle relative to the longitudinal direction of the handle 110. Furthermore, the blade portion 120 has a second blade 122 that protrudes from the tip of the handle 110 at an angle relative to the longitudinal direction of the handle 110 in a direction different from the first blade 121. This makes it possible to distribute the load applied to the blade portion 120 when lifting the oil seal 300.

[0047] The oil seal removal jig 100 further includes another fulcrum body 130a that protrudes from the handle 110 by a different amount than the fulcrum body 130. The fulcrum body 130 and the other fulcrum body 130a are each detachable from the handle 110. Therefore, by replacing the fulcrum body 130, the lifting height of the cutting portion 120 can be adjusted.

[0048] In addition, the end 111 of the handle 110 opposite the tip is chamfered, which reduces damage when the end 111 is hit hard, compared to when there is a corner.

[0049] Furthermore, because end 111 is struck by hammer 500, if end 111 is not chamfered, the shape of the corners will be deformed. If the corners of end 111 are significantly deformed, it will be difficult to remove fulcrum 130 from end 111, making it impossible to replace fulcrum 130. For this reason, by chamfering end 111 as in the first embodiment, this can be avoided.

[0050] Furthermore, when the cutting edge 120 pierces the oil seal 300, the protective member 140 is pressed against at least one of the attachment portion 400 and the oil seal 300 and elastically deforms before the cutting edge 120 comes into contact with the oil seal 300. Therefore, the oil seal removal jig 100 can be used without removing the protective member 140 from the handle 110.

[0051] 100 Oil seal removal jig, 110 Handle, 111 End, 120 Cutting portion, 121 First blade, 122 Second blade, 130, 130a Fulcrum body, 140 Protective member, 200 Shaft member, 300 Oil seal, 400 Mounting portion, 500 Hammer

Claims

1. A handle that is held by the operator; A blade portion provided at the tip of the handle and adapted to pierce the oil seal; and A fulcrum body is provided in the middle of the handle, protrudes in a direction perpendicular to the longitudinal direction of the handle, and serves as a fulcrum when rotating the handle by contacting the mounting part on which the oil seal is mounted. An oil seal removal tool comprising: The fulcrum body is configured so that the fulcrum is located directly below the handle. Oil seal removal tool.

2. 2. An oil seal removal jig according to claim 1, wherein the fulcrum is attached to the handle in such a manner that its position in the longitudinal direction of the handle can be adjusted.

3. The blade portion is a first blade protruding obliquely from the tip with respect to a longitudinal direction of the handle; a second blade protruding from the tip obliquely with respect to the longitudinal direction of the handle in a direction different from that of the first blade; 3. The oil seal removal jig according to claim 1, further comprising:

4. Another fulcrum body whose protruding amount from the handle is different from that of the fulcrum body Further comprising:

3. The oil seal removal jig according to claim 1, wherein the fulcrum body and the another fulcrum body are each detachable from the handle.

5. 3. The oil seal removal jig according to claim 1, wherein an end of the handle opposite to the tip is chamfered.

6. An annular protective member fixed to the handle Further comprising:

3. The oil seal removal tool according to claim 1, wherein the protective member is pressed against at least one of the mounted portion and the oil seal and elastically deformed before the blade portion comes into contact with the oil seal when the blade portion is pierced into the oil seal.