Oil seal removal tool and oil seal removal method

Abstract

In this oil seal removal jig, a jig main body includes a helical wrapping member and a handle. The wrapping member has a tip end portion that is brought into contact with an oil seal, and a handle connecting portion. A catching portion is provided in the tip end portion. By rotating the handle connecting portion with the tip end portion pressed against the oil seal, a shaft member is squeezed by the wrapping member, the tip end portion is inserted between the shaft member and the oil seal, and the catching portion catches on the oil seal.

Description

[Technical field]

[0001] The present disclosure relates to an oil seal removal tool and an oil seal removal method. [Background technology]

[0002] In a conventional method for removing an oil seal, the claws of a gear puller are hooked onto the removal projections on the oil seal. The tip projection of the feed screw of the gear puller is also brought into contact with the center hole of the rotating shaft. From this state, the handle of the gear puller is rotated to project the feed screw, thereby pulling in the oil seal (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 9-317897 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional method of removing an oil seal using a gear puller, the oil seal needs to be provided with a dedicated removal protrusion, and therefore, if the oil seal does not have a dedicated removal protrusion, it is difficult to remove the oil seal using a gear puller.

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

[0006] The oil seal removal jig according to the present disclosure comprises a jig body that removes an oil seal attached to the outer periphery of a shaft member from a seal portion along the shaft member, the jig body having a tip portion that comes into contact with the oil seal and a handle connection portion, and a spiral winding member through which the shaft member is passed, and a handle that is connected to the handle connection portion and operated to move the winding member along the shaft member and rotate the handle connection portion around the shaft member, and a hook portion is provided on the tip portion, and by rotating the handle connection portion with the tip portion pressed against the oil seal, the shaft member is tightened by the winding member, the tip portion is inserted between the shaft member and the oil seal, and the hook portion is hooked onto the oil seal. In addition, the oil seal removal method according to the present disclosure includes the steps of passing a portion of a shaft member having an oil seal attached to its outer periphery inside a spiral winding member, rotating a portion of the winding member around the shaft member while pressing a tip of the winding member against the oil seal, thereby tightening the shaft member with the winding member and inserting the tip between the shaft member and the oil seal to hook a hook portion provided on the tip onto the oil seal, and moving the winding member along the shaft member while loosening the tightening of the shaft member by the winding member, thereby removing the oil seal from the sealing portion along the shaft member. Effect of the Invention

[0007] According to the oil seal removal jig and oil seal removal method disclosed herein, the oil seal can be removed more easily. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a side view showing the oil seal removal jig in the first embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing the oil seal removal jig of FIG. [Diagram 3] FIG. 2 is a rear view showing the oil seal removal jig of FIG. [Figure 4]2 is a side view showing the oil seal, the shaft member, and the seal portion in the first embodiment. FIG. [Diagram 5] FIG. 2 is a side view showing the tip portion of FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] FIG. 6 is a rear view showing the tip portion of FIG. 5. [Figure 8] FIG. 2 is a side view showing a modification of the tip portion of FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. [Figure 10] FIG. 9 is a rear view showing the tip portion of FIG. 8. [Figure 11] FIG. 4 is an explanatory diagram showing the state of the oil seal removal jig at the start of use. [Figure 12] 11 is an explanatory diagram showing a state in which the shaft member is fastened by the winding member. FIG. [Figure 13] 13 is an explanatory diagram showing a state in which the tip portion is inserted between a shaft member and an oil seal. FIG. [Figure 14] FIG. 11 is an explanatory diagram showing a state in which the hook portion is hooked onto the oil seal. [Figure 15] FIG. 11 is a side view showing a winding member in the second embodiment. [Figure 16] FIG. 11 is a front view showing a handle in the second embodiment. [Figure 17] FIG. 17 is a front view showing a state in which the handle shown in FIG. 16 is separated. [Figure 18] 11 is a side view showing an oil seal, a shaft member, and a seal portion in the second embodiment. FIG. [Figure 19] FIG. 11 is an explanatory diagram showing a state in which the jig body in the second embodiment is installed and used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

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

[0010] Embodiment 1 Fig. 1 is a side view showing an oil seal removal jig in embodiment 1. Fig. 2 is a cross-sectional view showing the oil seal removal jig of Fig. 1. Fig. 3 is a rear view showing the oil seal removal jig of Fig. 1. Fig. 4 is a side view showing the oil seal, a shaft member and a sealing portion in embodiment 1.

[0011] 1, an oil seal removal jig 100 includes a jig body 110. The jig body 110 is used when removing the oil seal 400 shown in FIG.

[0012] Here, the shaft member 500 shown in Fig. 4 is, for example, the main shaft of an elevator hoist (not shown). The seal part 600 is a member that prevents the lubricant applied to the hoist from leaking out. The oil seal 400 is a rubber ring member provided in the seal part 600, and is attached to the outer periphery of the shaft member 500.

[0013] The jig body 110 shown in FIG.

[0014] The winding member 200 is a member formed by winding at least one rectangular plate material into a spiral shape. In the first embodiment, three plates are used for the winding member 200. This makes it possible to distribute the load when removing the oil seal 400. In addition, metal is used as the material for the winding member 200 in consideration of strength and rigidity.

[0015] The wrap member 200 has a tip portion 210 and a number of handle connection portions 220 .

[0016] The tip portion 210 is a portion that comes into contact with the oil seal 400. The tip portion 210 is provided with a hook portion 211. The hook portion 211 is configured with a plurality of triangular claws.

[0017] The multiple handle connecting parts 220 are provided on an end of the wrapping member 200 opposite to the tip part 210. Each of the multiple handle connecting parts 220 is connected to the handle 300. The wrapping member 200 is connected to the handle 300 by the multiple handle connecting parts 220. For example, a wing bolt is used as each handle connecting part 220. Also, the handle connecting part 220 is provided on each plate material constituting the wrapping member 200.

[0018] The handle 300 is operated by an operator to move the wrapping member 200 along the shaft member 500 and to rotate the handle connection portion 220 around the shaft member 500 .

[0019] The handle 300 has a holding portion 310 and a gripping portion 320 .

[0020] The grip portion 320 is a portion that is held and operated by an operator, and has an X-shape as shown in FIG.

[0021] The holding portion 310 is a portion having an open end and the other end fixed to the gripping portion 320 .

[0022] The diameter of the holding portion 310 becomes smaller continuously with increasing distance from the open end. That is, the shape of the holding portion 310 is a truncated cone, and becomes narrower from the open end to the other end fixed to the gripping portion 320.

[0023] A part of the winding member 200 is inserted into the holding portion 310, and the tip portion 210 is exposed to the outside of the holding portion 310. Each of the multiple handle connection portions 220 is connected to the holding portion 310.

[0024] 1, a plurality of slits 311 are provided on the side surface of the holding portion 310. A corresponding handle connecting portion 220 passes through each slit 311. Therefore, the handle connecting portion 220 is connected to the side surface of the holding portion 310 so as to move from one end side where the holding portion 310 is open to the other end side where the grip portion 320 is fixed. Therefore, the winding member 200 is slidable relative to the holding portion 310 along the plurality of slits 311 in a direction in which the amount of protrusion from the holding portion 310 changes.

[0025] Fig. 5 is a side view showing the tip portion 210 of Fig. 1. Fig. 6 is a cross-sectional view taken along line VI-VI of Fig. 5. Fig. 7 is a rear view showing the tip portion 210 of Fig. 5.

[0026] The hook portion 211 provided on the tip portion 210 is a barbed member having a pointed tip. As described later, the tip portion 210 is inserted between the oil seal 400 and the shaft member 500 while being rotated by an operator. The hook portion 211 is pointed in the direction opposite to the direction of rotation.

[0027] Further, the tip portion 210 is provided with an inclined portion 212. This makes it easier to insert the tip portion 210 between the oil seal 400 and the shaft member 500.

[0028] Fig. 8 is a side view showing a modified example of the tip portion 210 of Fig. 1. Fig. 9 is a cross-sectional view taken along line IX-IX of Fig. 8. Fig. 10 is a rear view showing the tip portion 210 of Fig. 8.

[0029] The hook portion 211 in the modified example is formed by folding back a part of a plate material. This causes a part of the tip portion 210 to have an increased thickness. Therefore, when the tip portion 210 enters between the oil seal 400 and the shaft member 500, it is not easily removed from the oil seal 400.

[0030] In addition, the side surface 213 of the hook portion 211 functions as a barb for hooking onto the oil seal 400 .

[0031] Next, there will be described a method of using the oil seal removal jig 100. Figure 11 is an explanatory diagram showing the state of the oil seal removal jig 100 at the start of use.

[0032] When using the oil seal removal jig 100, the worker first passes the shaft member 500 inside the winding member 200, and moves the entire jig body 110 until the tip portion 210 is pressed against the oil seal 400. Hereinafter, this moving direction will be referred to as the forward direction, and the direction opposite to the forward direction will be referred to as the backward direction.

[0033] After pressing tip portion 210 against oil seal 400, the operator moves handle 300 further in the traveling direction. As a result, handle connection portion 220 moves toward grip portion 320 along slit 311 relative to holding portion 310. As a result, the diameter of winding member 200 becomes smaller.

[0034] The operator also operates the handle 300 to rotate the handle connection part 220. At this time, the tip part 210 is pressed against the oil seal 400 and does not rotate due to friction. As a result, the winding member 200 is squeezed, and the winding member 200 tightens the shaft member 500.

[0035] 12 is an explanatory diagram showing a state in which the shaft member 500 is fastened by the winding member 200. From this state, the worker pushes the entire jig body 110 in the forward direction while further rotating it. As a result, the tip portion 210 is inserted between the shaft member 500 and the oil seal 400.

[0036] 13 is an explanatory diagram showing a state in which the tip portion 210 is inserted between the shaft member 500 and the oil seal 400. In this state, the hook portion 211 is hooked onto the oil seal 400.

[0037] In this manner, by rotating the handle connection part 220 while the tip part 210 is pressed against the oil seal 400, the shaft member 500 is tightened by the winding member 200. Then, the tip part 210 is inserted between the shaft member 500 and the oil seal 400, and the hook part 211 is hooked onto the oil seal 400.

[0038] From this state, the operator rotates the handle 300 in the opposite direction, whereby the hook portion 211 bites into the oil seal 400. In addition, the tightening of the shaft member 500 by the wrapping member 200 is loosened.

[0039] Fig. 14 is an explanatory diagram showing a state in which the hook portion 211 is hooked onto the oil seal 400. Fig. 14 shows a state in which the hook portion 211 is hooked onto the dust lip portion 401 of the oil seal 400. Note that the operator can also further insert the tip portion 210 to hook the hook portion 211 onto the lip tip portion 402 of the oil seal 400.

[0040] After hooking the hook portion 211 onto the oil seal 400, the worker moves the entire jig body 110 in the backward direction along the shaft member 500. When the entire jig body 110 moves in the backward direction, the oil seal 400 also moves in the backward direction along the shaft member 500 and is removed from the seal portion 600.

[0041] In the oil seal removal jig 100 of the first embodiment, the jig body 110 rotates the handle connection part 220 with the tip part 210 pressed against the oil seal 400. As a result, the shaft member 500 is tightened by the wrapping member 200, the tip part 210 is inserted between the shaft member 500 and the oil seal 400, and the hook part 211 is hooked onto the oil seal 400. Therefore, the oil seal removal jig 100 can remove the oil seal 400 more easily.

[0042] The handle 300 also has a gripping portion 320 that is gripped by the operator, and a holding portion 310 that is connected to the handle connecting portion 220. The holding portion 310 has a truncated cone shape that narrows from one end to the other. One end of the holding portion 310 is open, and a part of the winding member 200 is inserted therein. The other end of the holding portion 310 is fixed to the gripping portion 320. The handle connecting portion 220 is connected to a side surface of the holding portion 310 so as to move from one end side of the holding portion 310 to the other end side.

[0043] Therefore, the oil seal removal jig 100 can accommodate changes in the cross-sectional shape of the winding member 200 during use.

[0044] The oil seal removal method in the first embodiment also includes a step of passing a part of the shaft member 500, on whose outer periphery the oil seal 400 is attached, inside the winding member 200. The oil seal removal method also includes a step of tightening the shaft member 500 with the winding member 200 by rotating a part of the winding member 200 around the shaft member 500 with the tip portion 210 pressed against the oil seal 400.

[0045] The oil seal removal method also includes a step of inserting tip portion 210 between shaft member 500 and oil seal 400 and hooking hook portion 211 onto oil seal 400. The oil seal removal method also includes a step of moving winding member 200 along shaft member 500 while loosening the fastening of shaft member 500 by winding member 200, thereby removing oil seal 400 from seal portion 600 along shaft member 500.

[0046] Therefore, in the oil seal removal method of the first embodiment, the oil seal 400 can be removed more easily.

[0047] Embodiment 2 Next, Fig. 15 is a side view showing a wrapping member 200 in embodiment 2. Fig. 16 is a front view showing a handle 300 in embodiment 2. Fig. 17 is a front view showing a state in which the handle 300 shown in Fig. 16 is separated.

[0048] In the second embodiment, the wrapping member 200 and the handle 300 are configured to be separable. The handle 300 also has a pair of separation members 330 which are connected to each other and can be separated from each other.

[0049] When the pair of separating members 330 are connected to each other, they sandwich the winding member 200 and become one with the winding member 200. When the pair of separating members 330 are separated from each other, they are separated from the winding member 200.

[0050] The separation members 330 have a bolt 331, a nut 332, and an anti-slip portion 333. When the bolt 331 of one separation member 330 is fastened to the nut 332 of the other separation member 330, the pair of separation members 330 are connected to each other to form the handle 300.

[0051] In addition, bolt 331 can be used as a handle by an operator by providing some leeway in the length under the neck.

[0052] The anti-slip portion 333 is a rubber member, and is curved according to the diameter of the shaft member 500. The anti-slip portion 333 comes into contact with the handle connection portion 220, which is the rear end portion of the wrapping member 200, when the pair of separating members 330 are connected.

[0053] In this embodiment, the non-slip portion 333 is in contact with the rear end of the winding member 200, but is not limited to this. The worker can adjust the attachment position of the non-slip portion 333 relative to the winding member 200 as desired.

[0054] 18 is a side view showing oil seal 400, shaft member 500, and seal portion 600 in embodiment 2. In embodiment 2, sheave 700 is connected to shaft member 500 so as to face oil seal 400. Therefore, in order to remove oil seal 400, it is necessary to install tool body 110 in the limited space between oil seal 400 and sheave 700.

[0055] FIG. 19 is an explanatory diagram showing a state in which the jig body 110 according to the second embodiment is installed and used.

[0056] When an operator uses the oil seal removal jig 100 , first, the winding member 200 is wound around the shaft member 500 .

[0057] Next, the pair of separation members 330 are attached to the handle connecting portion 220 of the winding member 200. Then, the bolt 331 and the nut 332 are fastened, so that the handle 300 and the winding member 200 are integrated together.

[0058] The operation during use thereafter is the same as in embodiment 1. That is, the operator moves the entire jig body 110 in the traveling direction and presses the tip portion 210 against the oil seal 400. Then, the operator rotates the handle 300. As a result, the shaft member 500 is tightened by the winding member 200.

[0059] From this state, the worker pushes the entire jig body 110 in the forward direction while further rotating it. As a result, the tip portion 210 is inserted between the shaft member 500 and the oil seal 400, and the hook portion 211 is hooked onto the oil seal 400.

[0060] Then, the operator rotates the handle 300 in the opposite direction to cause the hook portion 211 to bite into the oil seal 400. In addition, the fastening of the shaft member 500 by the wrapping member 200 is loosened.

[0061] From this state, when the entire jig body 110 moves in the backward direction, the oil seal 400 also moves in the backward direction along the shaft member 500 and is removed from the seal portion 600.

[0062] With such a configuration in the second embodiment, the same effects as those in the first embodiment can be obtained.

[0063] Moreover, the handle 300 in the second embodiment has a pair of separating members 330 that are connected to each other and can be separated from each other. When the pair of separating members 330 are connected to each other, they sandwich the winding member 200 and become one with the winding member 200. When the pair of separating members 330 are separated from each other, they separate from the winding member 200. In this way, by making the winding member 200 and the handle 300 separable, the position of the handle 300 relative to the winding member 200 can be adjusted. Therefore, even if a part that becomes an obstacle to the work is installed, it is possible to avoid this and remove the oil seal 400.

[0064] The material of the winding member 200 may be made of resin so as not to damage the shaft member 500. [Explanation of symbols]

[0065] 100 oil seal removal jig, 110 jig body, 200 winding member, 210 tip portion, 211 hook portion, 220 handle connection portion, 300 handle, 310 holding portion, 320 gripping portion, 330 separation member, 400 oil seal, 500 shaft member, 600 sealing portion.

Claims

1. A jig body for removing an oil seal attached to the outer periphery of a shaft member from a seal portion along the shaft member Equipped with The jig body is a spiral winding member having a tip portion that is in contact with the oil seal and a handle connection portion, the shaft member being passed through the inside of the spiral winding member; A handle that is connected to the handle connecting portion and operated to move the wrapping member along the shaft member and rotate the handle connecting portion around the shaft member. It has The tip portion is provided with a hook portion, an oil seal removal jig in which, by rotating the handle connection part with the tip part pressed against the oil seal, the shaft member is tightened by the winding member, the tip part is inserted between the shaft member and the oil seal, and the hook part is hooked onto the oil seal, The handle has a gripping portion that is gripped by an operator and a holding portion that is connected to the handle connecting portion, The holding portion has a truncated cone shape that narrows from one end to the other end, The one end of the holding portion is open, and a part of the winding member is inserted into the one end of the holding portion. The other end of the holding portion is fixed to the gripping portion, The handle connection portion is connected to a side surface of the holding portion so as to move from the one end side to the other end side of the holding portion.

2. a step of passing a part of a shaft member having an oil seal attached to its outer periphery through an inner side of a spirally wound member; a step of rotating a part of the winding member around the shaft member by using a handle while pressing the tip portion of the winding member against the oil seal, thereby tightening the shaft member with the winding member, inserting the tip portion between the shaft member and the oil seal, and hooking a hook portion provided at the tip portion onto the oil seal; and a step of removing the oil seal from the seal portion along the shaft member by moving the winding member along the shaft member while loosening the fastening of the shaft member by the winding member using the handle; An oil seal removal method comprising: the winding member has the tip portion that is brought into contact with the oil seal and a handle connection portion for connection to the handle, The handle has a gripping portion that is gripped by an operator and a holding portion that is connected to the handle connecting portion, The holding portion has a truncated cone shape that narrows from one end to the other end, The one end of the holding portion is open, and a part of the winding member is inserted into the one end of the holding portion. The other end of the holding portion is fixed to the gripping portion, The handle connection portion is connected to a side surface of the holding portion so as to move from the one end side to the other end side of the holding portion. How to remove the oil seal.

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