Oil seal dismounting assistive device and oil seal dismounting method

Abstract

In the auxiliary tool for disassembling the oil seal, an auxiliary tool main body is provided with a spiral winding component and a handle. The winding member has a handle connection portion and a tip portion abutting against the oil seal. And a hook part is arranged at the tail end part. In a state in which the tip portion is pressed against the oil seal, the handle connection portion is rotated, whereby the shaft member is fastened by the winding member, the tip portion is inserted between the shaft member and the oil seal, and the hook portion is hooked to the oil seal.

Description

Technical Field

[0001] The present invention relates to an oil seal disassembly aid and an oil seal disassembly method. Background Art

[0002] In the conventional oil seal removal method, the claw hook of the gear puller is hooked on the removal protrusion provided on the oil seal. In addition, the end protrusion of the feed screw of the gear puller abuts against the center hole of the rotating shaft. From this state, the handle of the gear puller is rotated to make the feed screw protrude, thereby pulling the oil seal closer (for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 9-317897 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned conventional method of removing the oil seal using a gear puller, it is necessary to provide a dedicated removal protrusion on the oil seal. Therefore, it is difficult to remove the oil seal using a gear puller if the dedicated removal protrusion is not provided on the oil seal.

[0008] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide an oil seal removal tool and an oil seal removal method that can more easily remove an oil seal.

[0009] Means for solving problems

[0010] The oil seal removal aid disclosed in the present disclosure includes an aid body, which removes the oil seal mounted on the outer periphery of the shaft member from the sealing portion along the shaft member, and includes: a spirally wound member having a handle connecting portion and a terminal portion abutting against the oil seal, the shaft member passing through the inner side of the wound member; and a handle, which is connected to the handle connecting portion and operated to move the wound member along the shaft member and rotate the handle connecting portion around the shaft member, and a hook portion is provided at the terminal portion, and the handle connecting portion is rotated while the terminal portion is pressed against the oil seal, thereby the shaft member is tightened by the wound member, and the terminal portion is inserted between the shaft member and the oil seal, and the hook portion is hooked on the oil seal.

[0011] In addition, the oil seal removal method involved in the present disclosure includes the following steps: passing a part of a shaft component with an oil seal installed on the outer circumference through the inner side of a spiral winding component; rotating a part of the winding component around the shaft component while pressing the terminal end of the winding component against the oil seal, thereby tightening the shaft component with the winding component, inserting the terminal end between the shaft component and the oil seal, and hooking the hook portion provided at the terminal end on the oil seal; and loosening the tightening of the winding component to the shaft component, and moving the winding component along the shaft component, thereby removing the oil seal from the sealing portion along the shaft component.

[0012] Effects of the Invention

[0013] According to the oil seal removal aid and the oil seal removal method disclosed in the present invention, the oil seal can be removed more easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a side view showing the oil seal removal tool according to the first embodiment.

[0015] Figure 2 Yes means Figure 1 sectional view of the oil seal removal tool.

[0016] Figure 3 Yes means Figure 1 Rear view of the oil seal removal tool.

[0017] Figure 4 It is a side view showing the oil seal, the shaft member, and the sealing portion according to the first embodiment.

[0018] Figure 5 Yes means Figure 1 Side view of the terminal end.

[0019] Figure 6 It is along Figure 5 A cross-sectional view taken along line VI-VI.

[0020] Figure 7 Yes means Figure 5 Rear view of the terminal end.

[0021] Figure 8 Yes means Figure 1 A side view of a deformation example of the terminal end portion.

[0022] Fig. 9 It is along Figure 8 A cross-sectional view taken along line IX-IX.

[0023] Fig.10 Yes means Figure 8 Rear view of the terminal end.

[0024] Fig.11This is an explanatory diagram showing the state at the beginning of using the oil seal removal tool.

[0025] Fig.12 It is an explanatory diagram showing a state where the shaft member is fastened by the winding member.

[0026] Fig.13 It is an explanatory diagram showing a state in which the tip end portion is inserted between the shaft member and the oil seal.

[0027] Fig.14 It is an explanatory diagram showing a state where the hook portion is hooked on the oil seal.

[0028] Fig.15 It is a side view showing the winding member of the second embodiment.

[0029] Fig.16 It is a front view showing the handle of the second embodiment.

[0030] Fig.17 It means to make Fig.16 A front view of the handle shown in a detached state.

[0031] Fig.18 It is a side view showing an oil seal, a shaft member, and a sealing portion according to the second embodiment.

[0032] Fig.19 This is an explanatory diagram showing a state in which the assisting tool main body according to the second embodiment is installed and used. DETAILED DESCRIPTION

[0033] Hereinafter, embodiments will be described with reference to the drawings.

[0034] Implementation method 1.

[0035] Figure 1 It is a side view showing the oil seal removal tool according to the first embodiment. Figure 2 Yes means Figure 1 sectional view of the oil seal removal tool. Figure 3 Yes means Figure 1 Rear view of the oil seal removal tool. Figure 4 It is a side view showing the oil seal, the shaft member, and the sealing portion according to the first embodiment.

[0036] exist Figure 1 In the embodiment, the oil seal removal auxiliary tool 100 includes an auxiliary tool body 110. The auxiliary tool body 110 is Figure 4 The oil seal 400 shown is used when it is removed from the sealing portion 600 along the shaft member 500 .

[0037] Here, Figure 4The shaft member 500 shown is, for example, a main shaft of a traction machine of an elevator (not shown). The seal portion 600 is a member that prevents the lubricant applied to the traction machine from flowing out. The oil seal 400 is a rubber ring member provided in the seal portion 600 and is mounted on the outer periphery of the shaft member 500.

[0038] Figure 1 The assistive device body 110 shown has a winding component 200 and a handle 300 .

[0039] The winding member 200 is a member formed by spirally forming at least one rectangular plate. In the first embodiment, three plates are used for the winding member 200. This allows the load to be dispersed when removing the oil seal 400. In addition, as a material for the winding member 200, metal is used in consideration of strength and rigidity.

[0040] The winding member 200 has a terminal portion 210 and a plurality of handle connection portions 220 .

[0041] The tip end portion 210 is a portion that contacts the oil seal 400. The tip end portion 210 is provided with a hook portion 211. The hook portion 211 is composed of a plurality of triangular claws.

[0042] A plurality of handle connection parts 220 are provided at the end of the winding member 200 on the side opposite to the terminal part 210. The plurality of handle connection parts 220 are connected to the handle 300, respectively. The winding member 200 is connected to the handle 300 via the plurality of handle connection parts 220. For example, a butterfly bolt is used as each handle connection part 220. In addition, the handle connection part 220 is provided on each plate constituting the winding member 200.

[0043] The handle 300 is operated by an operator, thereby moving the winding member 200 along the shaft member 500 and rotating the handle connection portion 220 around the shaft member 500 .

[0044] The handle 300 includes a holding portion 310 and a grip portion 320 .

[0045] The gripping portion 320 is a portion that is gripped and operated by the operator. Figure 3 As shown, the grip portion 320 is in an X shape.

[0046] The holding portion 310 is a portion with one end opened and the other end fixed to the gripping portion 320 .

[0047] The diameter of the holding portion 310 continuously decreases as it moves away from the open end. That is, the holding portion 310 is in the shape of a truncated cone, and becomes narrower as it moves from the open end to the other end fixed to the gripping portion 320.

[0048] A portion of the winding member 200 is inserted into the holding portion 310, and the distal end portion 210 is exposed to the outside of the holding portion 310. A plurality of handle connecting portions 220 are connected to the holding portion 310, respectively.

[0049] In addition, if Figure 1 As shown, a plurality of slits 311 are provided on the side of the holding portion 310. The corresponding handle connecting portion 220 passes through each slit 311. Therefore, the handle connecting portion 220 is connected to the side of the holding portion 310 in a manner of moving from one end side of the opening of the holding portion 310 to the other end side fixed to the gripping portion 320. Therefore, the winding member 200 can slide along the plurality of slits 311 relative to the holding portion 310 in a direction in which the amount of protrusion from the holding portion 310 changes.

[0050] Figure 5 Yes means Figure 1 A side view of the terminal end portion 210. Figure 6 It is along Figure 5 A cross-sectional view taken along line VI-VI. Figure 7 Yes means Figure 5 A rear view of the terminal end portion 210.

[0051] The hook portion 211 provided at the distal end portion 210 is a barb member with a sharp tip. As described later, the distal end 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 sharpened in the direction opposite to the rotation direction.

[0052] In addition, the inclined portion 212 is provided at the distal end portion 210. Therefore, the operation of inserting the distal end portion 210 between the oil seal 400 and the shaft member 500 is facilitated.

[0053] Figure 8 Yes means Figure 1 A side view of a modified example of the terminal end portion 210. Fig. 9 It is along Figure 8 A cross-sectional view taken along line IX-IX. Fig.10 Yes means Figure 8 A rear view of the terminal end portion 210.

[0054] The hook portion 211 of the modified example is formed by folding back a portion of the plate. As a result, a portion of the terminal portion 210 is increased in thickness. Therefore, if the terminal portion 210 enters between the oil seal 400 and the shaft member 500, it will not fall off the oil seal 400 easily.

[0055] In addition, the side surface 213 of the hook portion 211 functions as a barb for hooking on the oil seal 400 .

[0056] Next, a method of using the oil seal removal tool 100 will be described. Fig.11It is an explanatory diagram showing a state at the beginning of use of the oil seal removal tool 100.

[0057] When using the oil seal removal tool 100, the operator first passes the shaft member 500 through the inner side of the winding member 200 and moves the tool body 110 as a whole until the distal end portion 210 is pressed against the oil seal 400. Hereinafter, this moving direction is referred to as the advancing direction, and the direction opposite to the advancing direction is referred to as the retreating direction.

[0058] After pressing the distal end portion 210 against the oil seal 400, the operator moves the handle 300 further in the advancing direction. As a result, the handle connecting portion 220 moves relative to the holding portion 310 along the slit 311 toward the gripping portion 320. As a result, the diameter of the winding member 200 decreases.

[0059] In addition, the operator operates the handle 300 to rotate the handle connection part 220. At this time, the terminal part 210 is pressed against the oil seal 400 and does not rotate due to friction. Therefore, the winding member 200 is tightened and the shaft member 500 is fastened by the winding member 200.

[0060] Fig.12 1 is an explanatory diagram showing a state where the shaft member 500 is tightened by the winding member 200 . From this state, the operator further rotates the entire auxiliary tool body 110 while pushing it in the advancing direction. As a result, the distal end portion 210 is inserted between the shaft member 500 and the oil seal 400 .

[0061] Fig.13 1 and 2 are explanatory diagrams showing a state in which the distal end portion 210 is inserted between the shaft member 500 and the oil seal 400 . In this state, the hook portion 211 is hooked on the oil seal 400 .

[0062] Thus, the handle connection part 220 is rotated while the distal end part 210 is pressed against the oil seal 400, so that the shaft member 500 is fastened to the winding member 200. Then, the distal end part 210 is inserted between the shaft member 500 and the oil seal 400, and the hook part 211 is hooked on the oil seal 400.

[0063] From this state, the operator rotates the handle 300 in the opposite direction. As a result, the hook portion 211 bites into the oil seal 400. In addition, the tightening of the winding member 200 to the shaft member 500 is released.

[0064] Fig.14 2 is an explanatory diagram showing a state where the hook portion 211 is hooked on the oil seal 400. Fig.14 , the hook portion 211 is hooked on the dustproof lip portion 401 of the oil seal 400. In addition, the hook portion 211 can be hooked on the lip terminal portion 402 of the oil seal 400 by the operator further inserting the terminal portion 210.

[0065] After hooking the hook portion 211 on the oil seal 400 , the operator moves the entire tool body 110 backward along the shaft member 500 . When the entire tool body 110 moves backward, the oil seal 400 also moves backward along the shaft member 500 and is separated from the sealing portion 600 .

[0066] In the oil seal removal tool 100 of the first embodiment, the handle connection part 220 is rotated while the tip part 210 is pressed against the oil seal 400 in the tool body 110. As a result, the shaft member 500 is fastened by the winding member 200, and the tip part 210 is inserted between the shaft member 500 and the oil seal 400, and the hook part 211 is hooked on the oil seal 400. Therefore, the oil seal removal tool 100 can remove the oil seal 400 more easily.

[0067] In addition, the handle 300 has a gripping portion 320 gripped by the operator and a holding portion 310 connected to the handle connecting portion 220. The holding portion 310 has a truncated cone shape that narrows from one end to the other end. One end of the holding portion 310 is open, and a part of the winding member 200 is inserted. The other end of the holding portion 310 is fixed to the gripping portion 320. The handle connecting portion 220 is connected to the side of the holding portion 310 in a manner that moves from one end side of the holding portion 310 to the other end side.

[0068] Therefore, the oil seal removal tool 100 can cope with changes in the cross-sectional shape of the wound member 200 during use.

[0069] In addition, the oil seal removal method of the first embodiment includes a step of passing a portion of the shaft member 500 having the oil seal 400 mounted on the outer periphery through the inner side of the winding member 200. In addition, the oil seal removal method includes a step of rotating a portion of the winding member 200 around the shaft member 500 while the terminal portion 210 is pressed against the oil seal 400, thereby fastening the shaft member 500 with the winding member 200.

[0070] In addition, the oil seal removal method includes the steps of inserting the terminal portion 210 between the shaft member 500 and the oil seal 400 and hooking the hook portion 211 on the oil seal 400. In addition, the oil seal removal method includes the steps of loosening the tightening of the winding member 200 to the shaft member 500 and moving the winding member 200 along the shaft member 500, thereby removing the oil seal 400 from the sealing portion 600 along the shaft member 500.

[0071] Therefore, in the oil seal removal method according to the first embodiment, the oil seal 400 can be removed more easily.

[0072] Implementation method 2.

[0073] then, Fig.15It is a side view showing the winding member 200 according to the second embodiment. Fig.16 It is a front view showing the handle 300 of the second embodiment. Fig.17 It means to make Fig.16 The handle 300 is shown as a front view in a separated state.

[0074] In Embodiment 2, the winding member 200 and the handle 300 are configured to be separable. In addition, the handle 300 has a pair of separation members 330 that are connected to each other and can be separated from each other.

[0075] When the pair of separation members 330 are connected to each other, they sandwich the winding member 200 and become one with the winding member 200. In addition, when the pair of separation members 330 are separated from each other, they are separated from the winding member 200.

[0076] The separation member 330 includes a bolt 331, a nut 332, and an anti-slip portion 333. By fastening the bolt 331 of one separation member 330 and 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.

[0077] In addition, the bolt 331 is used as a grip for the operator by providing an extra length under the neck.

[0078] The anti-slip portion 333 is a rubber member, and is bent 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 winding member 200, when the pair of separation members 330 are connected.

[0079] In addition, here, the anti-slip part 333 contacts the rear end portion of the winding member 200, but the present invention is not limited to this. The operator can arbitrarily adjust the attachment position of the anti-slip part 333 with respect to the winding member 200.

[0080] Fig.18 1 is a side view showing an oil seal 400, a shaft member 500, and a sealing portion 600 according to 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 provide an auxiliary tool body 110 in a limited space between the oil seal 400 and the sheave 700.

[0081] Fig.19 This is an explanatory diagram showing a state in which the assisting tool main body 110 according to the second embodiment is installed and used.

[0082] When a worker uses the oil seal removal tool 100 , the worker first winds the winding member 200 around the shaft member 500 .

[0083] Next, the pair of separation members 330 are mounted on the handle connection portion 220 of the winding member 200. Then, by tightening the bolts 331 and the nuts 332, the handle 300 and the winding member 200 are integrated.

[0084] The subsequent operation during use is the same as that of Embodiment 1. That is, the operator moves the entire auxiliary tool body 110 in the travel direction and presses the distal end portion 210 against the oil seal 400. Then, the operator rotates the handle 300. Thus, the shaft member 500 is tightened by the winding member 200.

[0085] From this state, the operator further rotates the entire tool body 110 while pushing it in the advancing direction. As a result, the distal end portion 210 is inserted between the shaft member 500 and the oil seal 400 , and the hook portion 211 is hooked on the oil seal 400 .

[0086] Then, the operator rotates the handle 300 in the reverse direction to cause the hook portion 211 to bite into the oil seal 400. In addition, the tightening of the winding member 200 to the shaft member 500 is released.

[0087] When the entire auxiliary tool body 110 moves in the rearward direction from this state, the oil seal 400 also moves in the rearward direction along the shaft member 500 and is separated from the sealing portion 600 .

[0088] According to the structure of the second embodiment, the same effects as those of the first embodiment can be obtained.

[0089] In addition, the handle 300 of the second embodiment has a pair of separation members 330 that are connected to each other and separated from each other. When the pair of separation members 330 are connected to each other, they sandwich the winding member 200 and become one with the winding member 200. In addition, when the pair of separation members 330 are separated from each other, they are separated from the winding member 200. In this way, by making it possible to separate the winding member 200 and the handle 300, the position of the handle 300 relative to the winding member 200 can be adjusted. Therefore, even if a member that becomes an obstacle in the operation is provided, the oil seal 400 can be removed by avoiding the member.

[0090] In order to avoid damaging the shaft member 500 , the winding member 200 may be made of resin.

[0091] Description of symbols

[0092] 100: oil seal removal aid; 110: aid body; 200: winding part; 210: terminal end; 211: hooking part; 220: handle connecting part; 300: handle; 310: holding part; 320: holding part; 330: separation part; 400: oil seal; 500: shaft part; 600: sealing part.

Claims

1. An oil seal removal tool, comprising a tool body, the tool body being configured to remove an oil seal mounted on the outer periphery of a shaft member from a sealing portion along the shaft member, The auxiliary tool body has: a spiral winding member having a handle connecting portion and a terminal portion abutting against the oil seal, wherein the shaft member passes through an inner side of the winding member; and a handle 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, A hook portion is provided at the end portion, The handle connection portion is rotated while the distal end portion is pressed against the oil seal, whereby the shaft member is fastened by the winding member, the distal end portion is inserted between the shaft member and the oil seal, and the hook portion is hooked on the oil seal.

2. The oil seal removal aid according to claim 1, wherein: The handle comprises a gripping portion gripped by an operator and a holding portion connected to the handle connecting portion. The retaining portion is in the shape of a truncated cone that narrows from one end to the other end. The one end of the holding portion is open for inserting a portion of the winding member. The other end of the holding portion is fixed to the holding 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.

3. The oil seal removal aid according to claim 1, wherein: The handle has a pair of separate parts connected to each other and separated from each other. The pair of separation members sandwich the winding member and become integrated with the winding member when connected to each other, and separate from the winding member when separated from each other.

4. A method for disassembling an oil seal, comprising the following steps: Passing a portion of a shaft member having an oil seal mounted on an outer periphery thereof through the inner side of the spirally wound member; The winding member is partially rotated around the shaft member while the terminal end of the winding member is pressed against the oil seal, thereby fastening the shaft member with the winding member, inserting the terminal end between the shaft member and the oil seal, and hooking the hook portion provided at the terminal end to the oil seal; and The winding member is loosened from being fastened to the shaft member, and the winding member is moved along the shaft member, thereby removing the oil seal from the sealing portion along the shaft member.

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