Oil seal removal jig, 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

Oil seal removal jig and oil seal removal method

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

[0002] In a conventional oil seal removal method, the claws of a gear puller are hooked onto the removal protrusions on the oil seal. The tip protrusion of the gear puller's feed screw is then placed against the center hole of the rotating shaft. From this state, the gear puller's handle is rotated to protrude the feed screw, thereby pulling in the oil seal (see, for example, Patent Document 1).

[0003] Japanese Patent Application Publication No. 9-317897

[0004] In the conventional oil seal removal method using a gear puller as described above, the oil seal must 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 aims to provide an oil seal removal jig and an oil seal removal method that make it easier to remove an oil seal.

[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, 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, the tip portion having a hook 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 the tip of the winding member against the oil seal, thereby tightening the shaft member with the winding member, inserting the tip between the shaft member and the oil seal, and hooking the 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.

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

[0008] 16 is a side view showing an oil seal removal jig in embodiment 1. FIG. 17 is a cross-sectional view showing the oil seal removal jig of FIG. 1. FIG. 18 is a rear view showing the oil seal removal jig of FIG. 1. FIG. 19 is a side view showing an oil seal, a shaft member, and a seal portion in embodiment 1. FIG. 20 is a side view showing the tip portion of FIG. 1. FIG. 21 is a cross-sectional view taken along line VI-VI of FIG. 5. FIG. 22 is a rear view showing the tip portion of FIG. 5. FIG. 23 is a side view showing a modified example of the tip portion of FIG. 1. FIG. 24 is a cross-sectional view taken along line IX-IX of FIG. 8. FIG. 25 is a rear view showing the tip portion of FIG. 8. FIG. 26 is an explanatory view showing a state at the start of use of the oil seal removal jig. FIG. 27 is an explanatory view showing a state in which the shaft member is tightened by the winding member. FIG. 28 is an explanatory view showing a state in which the tip portion is inserted between the shaft member and the oil seal. FIG. 29 is an explanatory view showing a state in which the hook portion is hooked on the oil seal. FIG. 29 is a side view showing a winding member in embodiment 2. FIG. 29 is a front view showing a handle in embodiment 2. FIG. 29 is a front view showing a state in which the handle shown in FIG. 16 is separated. FIG. 29 is a side view showing an oil seal, a shaft member, and a seal portion in embodiment 2. FIG. 10 is an explanatory diagram showing the state in which the jig body in the second embodiment is installed and used.

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

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

[0011] 1, the 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] 4 is, for example, the main shaft of an elevator hoist (not shown). The seal unit 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 unit 600, and is attached to the outer periphery of the shaft unit 500.

[0013] The jig body 110 shown in FIG. 1 includes a wrapping member 200 and a handle 300 .

[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 allows the load to be distributed when removing the oil seal 400. Furthermore, metal is used as the material for the winding member 200 in consideration of its strength and rigidity.

[0015] The wrapping member 200 has a tip portion 210 and a plurality 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 plurality of handle connecting portions 220 are provided on the end portion of the wrapping member 200 opposite to the tip portion 210. Each of the plurality of handle connecting portions 220 is connected to the handle 300. The wrapping member 200 is connected to the handle 300 by the plurality of handle connecting portions 220. Each handle connecting portion 220 is, for example, a butterfly bolt. Furthermore, the handle connecting portion 220 is provided on each plate material that constitutes 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 rotate the handle connecting portion 220 around the shaft member 500 .

[0019] The handle 300 has a holding portion 310 and a grip 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 that is open at one end and is fixed to the grip portion 320 at the other end.

[0022] The diameter of the holding portion 310 continuously decreases with increasing distance from the open end, i.e., the shape of the holding portion 310 is a truncated cone, and the diameter narrows from the open end to the other end where the grip portion 320 is fixed.

[0023] A portion of the wrapping 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 plurality of handle connecting 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 open end of the holding portion 310 to the other end fixed to the grip portion 320. Therefore, the wrapping member 200 can slide relative to the holding portion 310 along the plurality of slits 311 in a direction that changes the amount of protrusion from the holding portion 310.

[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 with a pointed tip. As will be 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] Furthermore, the tip end portion 210 is provided with an inclined portion 212. This makes it easier to insert the tip end portion 210 between the oil seal 400 and the shaft member 500.

[0028] Fig. 8 is a side view showing a modification 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 this modified example is formed by folding back a portion of the plate material. This increases the thickness of a portion of the tip portion 210. Therefore, when the tip portion 210 is inserted between the oil seal 400 and the shaft member 500, it does not easily come off 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, we will explain how to use 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 then moves the entire jig body 110 until the tip end 210 is pressed against the oil seal 400. Hereinafter, this direction of movement 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 the tip portion 210 against the oil seal 400, the operator moves the handle 300 further in the direction of travel. As a result, the handle connecting portion 220 moves along the slit 311 relative to the holding portion 310 in a direction approaching the gripping portion 320. As a result, the diameter of the winding member 200 becomes smaller.

[0034] The operator also operates the handle 300 to rotate the handle connecting portion 220. At this time, the tip portion 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 the state in which the shaft member 500 is fastened by the winding member 200. From this state, the operator further rotates the entire jig body 110 while pushing it in the forward direction. 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 connecting 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, causing the hook portion 211 to bite into the oil seal 400. Also, the clamping of the shaft member 500 by the wrapping member 200 is loosened.

[0039] Figure 14 is an explanatory diagram showing the state in which the hook portion 211 is hooked onto the oil seal 400. Figure 14 shows the 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 insert the tip portion 210 further, thereby hooking 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 retreating direction along the shaft member 500. When the entire jig body 110 moves in the retreating direction, the oil seal 400 also moves in the retreating 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 handle connection portion 220 of the jig body 110 is rotated with the tip portion 210 pressed against the oil seal 400. As a result, the shaft member 500 is tightened by the wrapping member 200, 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. This allows the oil seal removal jig 100 to 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 portion of the winding member 200 is inserted into it. 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 of the holding portion 310 so as to be movable from one end side to the other end side of the holding portion 310.

[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 portion of the shaft member 500, on whose outer periphery the oil seal 400 is attached, through the inside of 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 portion of the winding member 200 around the shaft member 500 while pressing the tip portion 210 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 the handle 300 shown in Fig. 16 in a separated state.

[0048] In the second embodiment, the wrapping member 200 and the handle 300 are configured to be separable. The handle 300 has a pair of separating members 330 that 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 separate from the winding member 200.

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

[0051] In addition, the bolt 331 can be used as a handle by the operator by providing a sufficient 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. When the pair of separating members 330 are connected, the anti-slip portion 333 comes into contact with the handle connecting portion 220, which is the rear end portion of the wrapping member 200.

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

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

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

[0057] Next, the pair of separating members 330 are attached to the handle connecting portions 220 of the winding member 200. Then, the bolts 331 and nuts 332 are fastened, thereby integrating the handle 300 and the winding member 200 together.

[0058] The subsequent operation during use is the same as in embodiment 1. That is, the operator moves the entire jig body 110 in the direction of travel and presses the tip portion 210 against the oil seal 400. Then, the operator rotates the handle 300. This causes the winding member 200 to tighten the shaft member 500.

[0059] From this state, the worker further rotates the entire jig body 110 while pushing it in the direction of travel, so that 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 tightening of the winding member 200 around the shaft member 500 is loosened.

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

[0062] The configuration of the second embodiment can also achieve the same effects as those of the first embodiment.

[0063] Furthermore, 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 piece with it. 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 any parts that may obstruct the work are installed, these can be avoided and the oil seal 400 can be removed.

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

[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 Grip 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 spiral winding 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.