Oil seal dismounting aid and oil seal dismounting method

Abstract

In the oil seal dismounting aid, the aid main body has a spiral winding member and a handle. The winding member has a handle connecting portion and a terminal portion abutting against the oil seal. A hooking portion is provided at the terminal portion. In the state that the terminal portion is pressed against the oil seal, the handle connecting portion is rotated, so that the shaft member is fastened by the winding member, and the terminal portion is inserted between the shaft member and the oil seal, and the hooking portion is hooked on the oil seal.

Description

Technical Field

[0001] This disclosure relates to oil seal removal tools and methods. Background Technology

[0002] In conventional oil seal removal methods, the claw hooks of a gear puller are hooked onto a removal protrusion provided on the oil seal. Furthermore, the end protrusion of the gear puller's feed screw abuts against the center hole of the rotating shaft. From this position, rotating the handle of the gear puller causes the feed screw to protrude, thereby pulling the oil seal closer (e.g., Patent Document 1).

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 9-317897 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] In the conventional method of removing oil seals using a gear puller, as described above, a dedicated removal protrusion is required on the oil seal. Therefore, without a dedicated removal protrusion on the oil seal, it is difficult to remove the oil seal using a gear puller.

[0008] This disclosure was made to solve the aforementioned problems, and its purpose is to provide an oil seal removal tool and method that make it easier to remove the oil seal.

[0009] Methods for solving problems

[0010] The oil seal removal tool disclosed herein comprises a tool body that removes the oil seal, which is mounted on the outer periphery of a shaft component, from the sealing portion along the shaft component. The tool body has: a spiral winding component having a handle connection portion and an end portion that abuts against the oil seal, the shaft component passing through the inner side of the winding component; and a handle that is connected to and operated by the handle connection portion to move the winding component along the shaft component and to rotate the handle connection portion around the shaft component. A hook portion is provided at the end portion. When the end portion is pressed against the oil seal, the handle connection portion is rotated, thereby securing the shaft component to the winding component and inserting the end portion between the shaft component and the oil seal, with the hook portion hooking onto the oil seal.

[0011] Furthermore, the oil seal removal method disclosed herein includes the following steps: passing a portion of a shaft component on which an oil seal is mounted on the outer periphery through the inner side of a spiral winding component; with the end portion of the winding component pressed against the oil seal, rotating a portion of the winding component around the shaft component, thereby securing the shaft component with the winding component and inserting the end portion between the shaft component and the oil seal, hooking the hook portion provided at the end portion onto the oil seal; and loosening the winding component's fastening 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] Invention Effects

[0013] According to the oil seal removal tool and method disclosed herein, the oil seal can be removed more easily. Attached Figure Description

[0014] Figure 1 This is a side view showing the oil seal removal tool of Embodiment 1.

[0015] Figure 2 It means Figure 1 A cross-sectional view of the oil seal disassembly tool.

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

[0017] Figure 4 This is a side view showing the oil seal, shaft component, and sealing part of Embodiment 1.

[0018] Figure 5 It means Figure 1 Side view of the end portion.

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

[0020] Figure 7 It means Figure 5 Rear view of the end portion.

[0021] Figure 8 It means Figure 1 A side view of a modified example of the end portion.

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

[0023] Figure 10 It means Figure 8 Rear view of the end portion.

[0024] Figure 11This is an explanatory diagram showing the state when the oil seal is first used to disassemble the auxiliary tool.

[0025] Figure 12 This is an explanatory diagram showing the state in which the shaft component is fastened by the winding component.

[0026] Figure 13 This is an explanatory diagram showing the state in which the end portion is inserted between the shaft component and the oil seal.

[0027] Figure 14 This is an explanatory diagram showing the state of the hook being hooked onto the oil seal.

[0028] Figure 15 This is a side view showing the winding component of Embodiment 2.

[0029] Figure 16 This is a front view showing the handle of embodiment 2.

[0030] Figure 17 It means to make Figure 16 The front view showing the handle detached.

[0031] Figure 18 This is a side view showing the oil seal, shaft component, and sealing part of Embodiment 2.

[0032] Figure 19 This is an explanatory diagram showing the state of the assistive device body set up and used in Implementation Method 2. Detailed Implementation

[0033] The embodiments will now be described with reference to the accompanying drawings.

[0034] Implementation method 1.

[0035] Figure 1 This is a side view showing the oil seal removal tool of Embodiment 1. Figure 2 It means Figure 1 A cross-sectional view of the oil seal disassembly tool. Figure 3 It means Figure 1 Rear view of the oil seal removal tool. Figure 4 This is a side view showing the oil seal, shaft component, and sealing part of Embodiment 1.

[0036] exist Figure 1 In the middle, the oil seal disassembly tool 100 includes a tool body 110. The tool body 110 is used to disassemble the oil seal. Figure 4 The oil seal 400 shown is used when it is removed from the sealing part 600 along the shaft component 500.

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

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

[0039] The winding component 200 is a component formed by shaping at least one rectangular sheet into a spiral. In Embodiment 1, the winding component 200 uses three sheets. This allows the load to be distributed when the oil seal 400 is removed. Furthermore, metal is used as the material for the winding component 200, taking into account both strength and rigidity.

[0040] The winding component 200 has an end portion 210 and a plurality of handle connection portions 220.

[0041] The end portion 210 is the part that abuts against the oil seal 400. A hook portion 211 is provided at the end portion 210. The hook portion 211 is composed of multiple triangular claws.

[0042] Multiple handle connectors 220 are provided at the end of the winding member 200 on the side opposite to the end portion 210. Each handle connector 220 is connected to a handle 300. The winding member 200 is connected to the handle 300 via the multiple handle connectors 220. For example, a wing bolt is used as each handle connector 220. Furthermore, the handle connectors 220 are provided on each sheet metal constituting the winding member 200.

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

[0044] The handle 300 has a holding part 310 and a gripping part 320.

[0045] The gripping part 320 is a part that is held and operated by the operator. Additionally, as... Figure 3 As shown, the gripping part 320 is X-shaped.

[0046] The retaining part 310 is a part that is open at one end and fixed to the holding part 320 at the other end.

[0047] The diameter of the retaining part 310 decreases continuously as it moves away from the end of the opening. That is, the retaining part 310 is shaped like a truncated cone and narrows as it moves from the end of the opening to the end that is fixed to the holding part 320.

[0048] A portion of the winding member 200 is inserted into the retaining portion 310, with the end portion 210 protruding to the outside of the retaining portion 310. Multiple handle connecting portions 220 are respectively connected to the retaining portion 310.

[0049] In addition, such as Figure 1 As shown, a plurality of slits 311 are provided on the side of the retaining 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 retaining portion 310 in such a way that it moves from one end of the opening of the retaining portion 310 toward the other end fixed to the gripping portion 320. Therefore, the winding member 200 can slide along the plurality of slits 311 relative to the retaining portion 310 in a direction that changes the amount of protrusion from the retaining portion 310.

[0050] Figure 5 It means Figure 1 Side view of the end portion 210. Figure 6 It is along Figure 5 A sectional view along line VI-VI. Figure 7 It means Figure 5 Rear view of the end portion 210.

[0051] The hook portion 211 provided at the end portion 210 is a barbed component with a pointed end. As described later, the end portion 210 is inserted between the oil seal 400 and the shaft component 500 while being rotated by the operator. The hook portion 211 becomes pointed in the opposite direction to the rotation direction.

[0052] In addition, an inclined portion 212 is provided at the end portion 210. Therefore, it is easy to insert the end portion 210 between the oil seal 400 and the shaft component 500.

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

[0054] In the modified example, the hook portion 211 is formed by folding back a portion of the sheet metal. As a result, a portion of the end portion 210 becomes thicker. Therefore, if the end portion 210 is inserted between the oil seal 400 and the shaft member 500, it will not easily detach from the oil seal 400.

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

[0056] Next, the method of using the oil seal removal tool 100 will be explained. Figure 11This is an explanatory diagram showing the state when the oil seal is first used to disassemble the auxiliary tool 100.

[0057] When using the oil seal disassembly tool 100, the operator first passes the shaft component 500 through the inside of the winding component 200, causing the tool body 110 to move as a whole until the end portion 210 is pressed against the oil seal 400. Hereinafter, this direction of movement will be referred to as the traveling direction, and the direction opposite to the traveling direction will be referred to as the reversing direction.

[0058] After the operator presses the end portion 210 against the oil seal 400, the handle 300 is moved further in the travel direction. As a result, the handle connection portion 220 moves relative to the retaining portion 310 along the gap 311 toward the grip portion 320. Consequently, the diameter of the winding member 200 decreases.

[0059] Additionally, the operator operates the handle 300 to rotate the handle connection 220. At this time, the end portion 210 is pressed against the oil seal 400 and therefore does not rotate due to friction. As a result, the winding member 200 is tightened, and the shaft member 500 is secured by the winding member 200.

[0060] Figure 12 This is an explanatory diagram showing the state in which the shaft component 500 is secured by the winding component 200. From this state, the operator further rotates the auxiliary body 110 as a whole while pressing it in the direction of travel. As a result, the end portion 210 is inserted between the shaft component 500 and the oil seal 400.

[0061] Figure 13 This is an explanatory diagram showing the state in which the end portion 210 is inserted between the shaft component 500 and the oil seal 400. In this state, the hook portion 211 is hooked onto the oil seal 400.

[0062] Thus, with the end portion 210 pressed against the oil seal 400, the handle connection portion 220 is rotated, thereby securing the shaft component 500 to the winding component 200. Furthermore, the end portion 210 is inserted between the shaft component 500 and the oil seal 400, and the hook portion 211 hooks onto the oil seal 400.

[0063] From this position, the operator rotates the handle 300 in the opposite direction. This causes the hook 211 to engage with the oil seal 400. Additionally, the fastening of the winding member 200 to the shaft member 500 is loosened.

[0064] Figure 14 This is an explanatory diagram showing the state in which the hook part 211 is hooked onto the oil seal 400. Figure 14 The image shows the hook portion 211 hooked onto the dustproof lip 401 of the oil seal 400. Furthermore, by having the operator further insert the end portion 210, the hook portion 211 can also be hooked onto the lip end portion 402 of the oil seal 400.

[0065] After the operator hooks the hook 211 onto the oil seal 400, the auxiliary body 110 moves backward along the shaft component 500. As the auxiliary body 110 moves backward, the oil seal 400 also moves backward along the shaft component 500 and disengages from the sealing part 600.

[0066] In the oil seal removal tool 100 of Embodiment 1, the handle connection portion 220 is rotated while the end portion 210 is pressed against the oil seal 400. As a result, the shaft component 500 is secured by the winding member 200, and the end portion 210 is inserted between the shaft component 500 and the oil seal 400, with the hook portion 211 hooking onto the oil seal 400. Therefore, the oil seal removal tool 100 can more easily remove the oil seal 400.

[0067] Additionally, the handle 300 has a gripping portion 320 for the operator to hold and a retaining portion 310 connected to the handle connecting portion 220. The retaining portion 310 is shaped like a truncated cone, narrowing from one end to the other. One end of the retaining portion 310 is open for inserting a portion of the winding member 200. The other end of the retaining portion 310 is fixed to the gripping portion 320. The handle connecting portion 220 is connected to the side of the retaining portion 310 in a manner that allows it to move from one end to the other.

[0068] Therefore, the oil seal removal tool 100 can accommodate changes in the cross-sectional shape of the winding component 200 during use.

[0069] Furthermore, the oil seal removal method of Embodiment 1 includes a step of passing a portion of the shaft member 500 on which the oil seal 400 is mounted on the outer periphery through the inner side of the winding member 200. Additionally, the oil seal removal method includes the step of rotating a portion of the winding member 200 around the shaft member 500 while the end portion 210 is pressed against the oil seal 400, thereby securing the shaft member 500 using the winding member 200.

[0070] Additionally, the oil seal removal method includes the steps of inserting the end portion 210 between the shaft component 500 and the oil seal 400 and hooking the hook portion 211 onto the oil seal 400. Furthermore, the oil seal removal method includes the steps of loosening the fastening of the winding component 200 to the shaft component 500 and moving the winding component 200 along the shaft component 500, thereby removing the oil seal 400 from the sealing portion 600 along the shaft component 500.

[0071] Therefore, in the oil seal removal method of Embodiment 1, the oil seal 400 can be removed more easily.

[0072] Implementation method 2.

[0073] then, Figure 15This is a side view showing the winding member 200 of Embodiment 2. Figure 16 This is a front view of the handle 300 in embodiment 2. Figure 17 It means to make Figure 16 The front view of the handle 300 in the detached state.

[0074] In embodiment 2, the winding member 200 and the handle 300 are configured to be separable. Furthermore, the handle 300 has a pair of separable members 330 that are connected to and separate from each other.

[0075] When the pair of separate parts 330 are connected to each other, they sandwich the winding part 200 and become integral with the winding part 200. In addition, when the pair of separate parts 330 are separated from the winding part 200, they separate from each other.

[0076] The separating component 330 has a bolt 331, a nut 332, and an anti-slip part 333. By fastening the bolt 331 of one separating component 330 to the nut 332 of another separating component 330, a pair of separating components 330 are connected to each other to form a handle 300.

[0077] Additionally, bolt 331 serves as a handle for the operator by allowing for a longer neck length.

[0078] The anti-slip part 333 is a rubber component that is bent according to the diameter of the shaft component 500. When a pair of separate components 330 are connected, the anti-slip part 333 contacts the handle connection part 220, which is the rear end of the winding component 200.

[0079] Furthermore, the anti-slip part 333 contacts the rear end of the winding member 200, but is not limited to this. The operator can adjust the installation position of the anti-slip part 333 relative to the winding member 200 as needed.

[0080] Figure 18 This is a side view showing the oil seal 400, shaft component 500, and sealing part 600 in Embodiment 2. In Embodiment 2, the pulley 700 is connected to the shaft component 500 in a manner opposite to the oil seal 400. Therefore, in order to remove the oil seal 400, an auxiliary body 110 needs to be provided in the limited space between the oil seal 400 and the pulley 700.

[0081] Figure 19 This is an explanatory diagram showing the state of the assistive device body 110 in use according to embodiment 2.

[0082] When the operator uses the oil seal to disassemble the auxiliary tool 100, firstly, the winding component 200 is wound around the shaft component 500.

[0083] Next, a pair of separate parts 330 are installed on the handle connection portion 220 of the winding part 200. Furthermore, the handle 300 and the winding part 200 are integrated by fastening the bolts 331 and the nuts 332.

[0084] The subsequent operation is the same as in Embodiment 1. That is, the operator moves the entire auxiliary body 110 along the traveling direction and presses the end portion 210 against the oil seal 400. Then, the operator rotates the handle 300. As a result, the shaft component 500 is secured by the winding component 200.

[0085] From this position, the operator further rotates the main body 110 of the auxiliary tool while pressing it in the direction of travel. As a result, the end part 210 is inserted between the shaft component 500 and the oil seal 400, and the hook part 211 hooks onto the oil seal 400.

[0086] Then, the operator rotates the handle 300 in the opposite direction, causing the hook 211 to engage with the oil seal 400. Additionally, the fastening of the winding component 200 to the shaft component 500 is loosened.

[0087] When the auxiliary body 110 moves backward as a whole from this state, the oil seal 400 also moves backward along the shaft component 500 and disengages from the sealing part 600.

[0088] Based on the structure of this embodiment 2, the same effect as that of embodiment 1 can also be obtained.

[0089] Furthermore, the handle 300 in Embodiment 2 has a pair of interconnected and separable parts 330. When interconnected, the pair of separable parts 330 clamp the winding part 200 and become integral with it. When separated, the pair of separable parts 330 separate from the winding part 200. Thus, by allowing the winding part 200 to be separated from the handle 300, the position of the handle 300 relative to the winding part 200 can be adjusted. Therefore, even if a part is provided that obstructs operation, the oil seal 400 can be removed while avoiding that part.

[0090] In addition, in order not to damage the shaft component 500, the winding component 200 can also be made of resin.

[0091] Label Explanation

[0092] 100: Oil seal disassembly tool; 110: Tool body; 200: Winding component; 210: End part; 211: Hook part; 220: Handle connection part; 300: Handle; 310: Holding part; 320: Grip part; 330: Separation component; 400: Oil seal; 500: Shaft component; 600: Sealing part.

Claims

1. An oil seal removal tool comprising a tool body for removing an oil seal mounted on the outer periphery of a shaft component from the sealing portion along the shaft component. The assistive device body has: A spiral winding component having a handle connection and an end portion abutting the oil seal, the shaft component passing through the inner side of the winding component; and A handle, which is connected to and operated via a handle connector, moves the winding member along the shaft member and rotates the handle connector about the shaft member. A hook is provided at the end portion. With the end portion pressed against the oil seal, the handle connection portion is rotated, thereby securing the shaft component to the winding component and inserting the end portion between the shaft component and the oil seal, with the hook portion hooking onto the oil seal. The handle has a gripping part for the operator to hold and a retaining part connected to the handle connecting part. The retaining portion is shaped like a frustum of a cone, which narrows from one end to the other. The retaining part has an opening at one end for inserting a portion of the winding member. The other end of the retaining part is fixed to the holding part. The handle connection is connected to the side of the retaining part in such a way that it moves from one end to the other end of the retaining part.

2. A method for disassembling an oil seal, comprising the following steps: A portion of the shaft component with an oil seal mounted on its outer periphery passes through the inner side of the spiral winding component; With the end portion of the winding member pressed against the oil seal, a portion of the winding member is rotated around the shaft member using the handle. This secures the shaft member with the winding member, and the end portion is inserted between the shaft member and the oil seal, hooking the hook portion provided at the end portion onto the oil seal. Using the handle, loosen the fastening of the winding component to the shaft component and move the winding component along the shaft component, thereby removing the oil seal from the sealing portion along the shaft component. The winding component has an end portion that abuts against the oil seal and a handle connection portion for connection with the handle. The handle has a gripping part for the operator to hold and a retaining part connected to the handle connecting part. The retaining portion is shaped like a frustum of a cone, which narrows from one end to the other. The retaining part has an opening at one end for inserting a portion of the winding member. The other end of the retaining part is fixed to the holding part. The handle connection is connected to the side of the retaining part in such a way that it moves from one end to the other end of the retaining part.

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