Bearing replacement aid for elevator hoisting machine and bearing replacement method

Abstract

A bearing replacement assisting tool for restricting relative movement of a worm shaft in an axial direction in a bearing replacement work of a hoisting machine for an elevator is provided. The hoisting machine includes a motor section, a worm shaft whose one end is connected to a rotating shaft of the motor section, a gear box into which the worm shaft is inserted, a thrust section bearing installed to the gear box to support the worm shaft, and a brake wheel fixed to the worm shaft between the gear box and the motor section. The bearing replacement assisting tool is provided with a first restriction member which is sandwiched between the brake wheel and the gear box above the worm shaft to restrict relative movement of the worm shaft with respect to the gear box when a work of pulling out the thrust section bearing from the gear box is performed. In addition, the bearing replacement assisting tool is provided with a second restriction member which is sandwiched between the brake wheel and the motor section above the worm shaft to restrict relative movement of the worm shaft with respect to the motor section when a work of installing the thrust section bearing to the gear box is performed.

Description

Technical Field

[0001] This disclosure relates to techniques for bearing replacement operations in auxiliary elevator traction machines. Background Technology

[0002] Patent Document 1 discloses a technology related to elevator traction machines. In this technology, by using a support platform and a bearing assembly on one side to support the load applied to the rotor shaft, the bearing assembly on the other side can be removed and the stator pulled out without using a crane or other lifting mechanism, thereby disassembling the motor, etc.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 8-81164 Summary of the Invention

[0006] The problem that the invention aims to solve

[0007] Sometimes, the bearings of worm gear traction machines used in elevators are firmly fitted onto the worm shaft. In this case, during the operation of removing the bearing from the worm shaft, the worm shaft itself may move axially along with the bearing. To prevent this, appropriate clamping of square materials or the like is considered, but there are issues regarding strength and ease of use. In the technology of the aforementioned Patent Document 1, no effective means are disclosed for restricting the movement of the shaft when removing the bearing from the shaft.

[0008] This disclosure was made to solve the above-mentioned problems, and its purpose is to provide a bearing replacement auxiliary tool and bearing replacement method that can limit the relative axial movement of the worm shaft during bearing replacement operations of elevator traction machines.

[0009] Methods for solving problems

[0010] This disclosure relates to a bearing replacement auxiliary tool used in bearing replacement operations for elevator traction machines. The traction mechanism includes: a motor unit; a worm shaft, one end of which is connected to the rotating shaft of the motor unit; a gearbox through which the worm shaft is inserted; a thrust bearing mounted in the gearbox and supporting the worm shaft; and a brake wheel fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement auxiliary tool includes a first limiting member that, during the operation of pulling the thrust bearing out of the gearbox, is clamped above the worm shaft between the brake wheel and the gearbox, thereby limiting the relative movement of the worm shaft relative to the gearbox.

[0011] Furthermore, this disclosure applies to a bearing replacement method for elevator traction machines. The traction mechanism includes: a motor unit; a worm shaft, one end of which is connected to the rotating shaft of the motor unit; a gearbox through which the worm shaft is inserted; a thrust bearing mounted in the gearbox and supporting the worm shaft; and a brake wheel fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement method includes the following steps: placing a first restraining member between the brake wheel and the gearbox; pulling the thrust bearing out of the worm shaft; and removing the first restraining member from the traction machine.

[0012] Furthermore, this disclosure applies to a bearing replacement method for elevator traction machines. The traction mechanism includes: a motor unit; a worm shaft, one end of which is connected to the rotating shaft of the motor unit; a gearbox through which the worm shaft is inserted; a thrust bearing mounted in the gearbox to support the worm shaft; and a brake wheel fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement method includes the following steps: placing a second limiting member between the brake wheel and the motor unit; installing the thrust bearing onto the worm shaft; and removing the second limiting member from the traction machine.

[0013] Invention Effects

[0014] According to the bearing replacement auxiliary tool disclosed herein, the relative axial movement of the worm shaft can be restricted during bearing replacement operations. As a result, the efficiency of bearing replacement operations is improved. Attached Figure Description

[0015] Figure 1 This is a diagram showing the external structure of a traction machine using a bearing replacement auxiliary tool according to an application implementation method.

[0016] Figure 2 This is a schematic diagram showing the internal structure around the gearbox of a traction machine.

[0017] Figure 3 This is a schematic diagram illustrating the disassembly process of the thrust bearing.

[0018] Figure 4 This is a perspective view showing the bearing replacement auxiliary tool of the traction machine according to this embodiment.

[0019] Figure 5 These are the three views of the first limiting component.

[0020] Figure 6 These are the three views of the second limiting component.

[0021] Figure 7 This is a schematic diagram showing a situation where a first limiting component is installed on a traction machine.

[0022] Figure 8 This is a schematic diagram showing a situation where a second limiting component is installed on the traction machine.

[0023] Figure 9 This diagram shows the state in which the first limiting component is installed on the traction machine.

[0024] Figure 10 This is a schematic diagram showing the state of the first limiting component in the traction machine as viewed from the gearbox side towards the brake wheel through the gearbox.

[0025] Figure 11 This is a partially enlarged view showing the state in which the second limiting component is installed on the traction machine.

[0026] Figure 12 This is a schematic diagram showing the state of the second limiting member installed on the traction machine as viewed from the motor section side towards the brake wheel. Detailed Implementation

[0027] Hereinafter, the embodiments will be described with reference to the accompanying drawings. Furthermore, common elements in all figures will be labeled with the same reference numerals, and repeated descriptions will be omitted.

[0028] Implementation method.

[0029] 1. External structure of the traction machine with bearing replacement auxiliary tools according to the application implementation method

[0030] Figure 1 This is a diagram showing the external structure of a traction machine using a bearing replacement auxiliary tool according to an application implementation method. Figure 2 This is a schematic diagram showing the internal structure around the gearbox of the traction machine. The traction machine 10 is a worm gear traction machine used in elevators. The traction machine 10 is located in the elevator machine room.

[0031] As the main structure related to bearing replacement operations, the traction machine 10 includes a gearbox 12, a motor unit 14, a brake wheel 16, a traction rope sheave 17, and a worm shaft 20. In addition to these structures, the traction machine 10 also includes various other structures, but their descriptions are omitted.

[0032] The gearbox 12 forms part of the structure of the traction machine 10. In the gearbox 12, the thrust bearing hole 121 and the ground bearing hole 122 are formed in opposite positions. In the following description, in the gearbox 12, the side with the ground bearing hole 122 is referred to as the "ground side", and the side with the thrust bearing hole 121 is referred to as the "thrust side".

[0033] The gearbox 12 includes a bearing housing 22 that houses the thrust bearing 24. The bearing housing 22 is fitted into the thrust bearing bore 121 with the thrust bearing 24 housed inside. A bearing cover 18 is mounted to the opening of the bearing housing 22 by cover bolts 19. A ground bearing 26 is fitted into the ground bearing bore 122.

[0034] The worm shaft 20 extends from the ground side of the gearbox 12 toward the thrust side and is supported by the thrust bearing 24 and the ground bearing 26. The worm wheel 202 of the worm shaft 20 meshes with a linkage gear (not shown) inside the gearbox 12. The linkage gear transmits the rotational force of the worm shaft 20 to the traction rope sheave 17. In the following description, the axial direction of the worm shaft 20 from the ground side toward the thrust side is referred to as the "thrust direction," and the direction from the thrust side toward the ground side is referred to as the "ground direction."

[0035] The motor unit 14 is detachably mounted to the structure of the traction machine 10 via bolts. The ground-side end of the worm shaft 20 is connected to the rotating shaft of the motor unit 14. When the rotating shaft of the motor unit 14 rotates, the worm shaft 20 rotates accordingly.

[0036] The brake wheel 16 is a component of the braking mechanism, and it is fixed in a manner that allows it to rotate together with the worm shaft 20. The brake wheel 16 is positioned between the gearbox 12 and the motor section 14 of the worm shaft 20.

[0037] 2. Features of the bearing replacement auxiliary tool in the embodiment

[0038] The thrust bearing 24 and the ground bearing 26 of the traction machine 10 are sometimes replaced. Figure 3 This is a schematic diagram illustrating the disassembly operation of the thrust bearing. When disassembling the thrust bearing 24, the operator first removes the cover bolt 19 to remove the bearing cover 18. Then, the two prepared jacking bolts 28 are screwed into the threaded holes of the bearing housing 22 and tightened evenly. As a result, the bearing housing 22 and the thrust bearing 24 are gradually pulled out from the thrust bearing hole 121 towards the thrust direction of the worm shaft 20.

[0039] Here, the thrust bearing 24 is securely fitted into the worm shaft 20. Therefore, when the thrust bearing 24 is pulled out in the thrust direction, the worm shaft 20 is sometimes also pulled in the thrust direction. To solve this problem, it is considered that during the pull-out operation of the bearing housing 22, suitable square timber such as wood is sandwiched between the ground-side wall of the gearbox 12 and the wall of the brake wheel 16 to restrict the relative movement of the brake wheel 16 relative to the gearbox 12. However, square timber such as wood presents challenges in terms of strength and ease of use.

[0040] The bearing replacement auxiliary tool of this embodiment is an auxiliary tool used to limit the relative movement of the worm shaft 20 relative to the gearbox 12 during the replacement operation of such a thrust bearing 24. Figure 4 This is a perspective view showing the bearing replacement auxiliary tool of the traction machine according to this embodiment. The bearing replacement auxiliary tool includes a first limiting member 30 and a second limiting member 40. Figure 5 These are the three views of the first limiting component. Figure 6 These are the three views of the second limiting component.

[0041] The first limiting member 30 is an auxiliary device used to clamp the brake wheel 16 and the ground side of the gearbox 12 above the worm shaft 20. The first limiting member 30 has a first flat portion 302 and a second flat portion 304. Both the first flat portion 302 and the second flat portion 304 are rectangular in shape, and one side along their long side is connected to each other so that the cross-section perpendicular to the long side direction forms a mountain shape. The angle between the first flat portion 302 and the second flat portion 304 is not limited. Typically, the two planes of the first limiting member 30 are connected so that the angle between the first flat portion 302 and the second flat portion 304 in the cross-section perpendicular to the long side direction is a right angle. The first limiting member 30 can, for example, utilize an L-shaped angle member of L3×30×30mm.

[0042] The total length of the long side of the first limiting member 30 is set with consideration of the positional relationship between the gearbox 12 and the brake wheel 16 of the traction machine 10. Figure 7 This is a schematic diagram illustrating the configuration of a first limiting member on a traction machine. As shown in the figure, the first limiting member 30 is configured such that its long side is recessed above the worm shaft 20 between the ground side of the gearbox 12 of the traction machine 10 and the brake wheel 16. Typically, the long side length of the first limiting member 30 is set to be slightly shorter than the distance between the ground side surface 123 of the gearbox 12 and the side surface 161 of the brake wheel 16 facing that side surface. For example, the long side length of the first limiting member 30 is 70 mm.

[0043] The first limiting member 30 has a first chamfered portion 306 at each of the two corners on the edge side of the first flat portion 302. Similarly, the first limiting member 30 has a first chamfered portion 306 at each of the two corners on the edge side of the second flat portion 304. The shape and size of the first chamfered portion 306 are not limited. Here, the first chamfered portion 306 is formed within approximately 1 / 3 of the length of the short side of the first flat portion 302 and the second flat portion 304. When the first limiting member 30 is, for example, an L-shaped angle member of L3×30×30, one side of the first chamfered portion 306 is 10mm.

[0044] A label portion 308 labeled "Ground Side" is attached to the first flat surface portion 302. The shape, size, and color of the label portion 308 are not limited. The label portion 308 may also cover the entire surface of the first flat surface portion 302. The color of the label portion 308 is preferably a fluorescent color or a color that is easily visible. Furthermore, the structure of the label portion 308 is not essential in the first limiting member 30.

[0045] The second limiting member 40 is an auxiliary device used to clamp between the brake wheel 16 and the motor section 14 above the worm shaft 20. The structure of the second limiting member 40, for example, can be the same as that of the first limiting member 30, except for its entire length in the long side direction. Specifically, the second limiting member 40 has a first flat portion 402 and a second flat portion 404. Both the first flat portion 402 and the second flat portion 404 are rectangular in shape, and one side in the long side direction is connected to each other so that the cross-section perpendicular to the long side direction is mountain-shaped. The angle between the first flat portion 402 and the second flat portion 404 is not limited. Typically, the two planes of the second limiting member 40 are connected so that the angle between the first flat portion 402 and the second flat portion 404 in the cross-section perpendicular to the long side direction is a right angle. The second limiting member 40 can, for example, utilize an L-shaped angle member of L3×30×30mm.

[0046] The total length of the long side of the second limiting member 40 is set with consideration of the positional relationship between the motor part 14 and the brake wheel 16 of the traction machine 10. Figure 8 This is a schematic diagram illustrating a configuration of a second limiting member on a traction machine. As shown in the figure, the brake wheel 16 has a cylindrical protrusion 163 at its center, where the worm shaft 20 is fixed, protruding towards the ground. The total length of the second limiting member 40 along its long side is set to be slightly shorter than the distance between the side portion 142 of the brake wheel 16 side of the motor unit 14 and the side portion 164 of the protrusion 163 facing the side portion 142. For example, the total length of the second limiting member 40 along its long side is 80 mm.

[0047] The second limiting member 40 has second chamfered portions 406 at both corners on the edge side of the first flat portion 402. Similarly, the second limiting member 40 has second chamfered portions 406 at both corners on the edge side of the second flat portion 404. The size of the second chamfered portions 406 is not limited. Here, the second chamfered portions 406 are formed within approximately 1 / 3 of the length of the short side of the first flat portion 402 and the second flat portion 404. When the second limiting member 40 is, for example, an L-shaped angle member of L3×30×30, one side of the second chamfered portion 406 is 10mm.

[0048] A label 408 labeled "motor side" is attached to the first flat surface 402. The shape, size, and color of the label 408 are not limited. The label 408 may also cover the entire surface of the first flat surface 402. The color of the label 408 is preferably a fluorescent color or a color that is easily visible. Furthermore, the label 408 is not essential in the second limiting member 40.

[0049] 3. Bearing replacement procedure using bearing replacement auxiliary tools

[0050] Next, the disassembly and installation methods of the thrust bearing 24 using the bearing replacement auxiliary tool of the embodiment will be described in detail. In addition to the steps shown below, there are various other steps involved in the disassembly and installation methods of the thrust bearing 24, but these will be omitted here.

[0051] Preparation process: Disassembly of the bearing cover

[0052] The workers removed the cover bolt 19 and thus removed the bearing cover 18. As a result, the thrust bearing 24, which was embedded inside the bearing housing, was exposed.

[0053] First step: Setting up the first limiting component

[0054] The operator places the first limiting component 30 on the traction machine 10. Figure 9 This diagram shows the state in which the first limiting component is installed on the traction machine. Figure 10 This is a schematic diagram showing the state of the first limiting component in the traction machine as viewed from the gearbox side towards the brake wheel through the gearbox.

[0055] As shown in these figures, the brake wheel 16 has a cylindrical protrusion 162 at its center where the worm shaft 20 is fixed, protruding in the thrust direction. A first limiting member 30 is positioned above the protrusion 162 of the brake wheel 16, with its long side aligned with the axial direction of the worm shaft 20 and protruding upwards. This limits the relative movement of the brake wheel 16 and the worm shaft 20 fixed to it relative to the gearbox 12 in the thrust direction.

[0056] Second step: Disassembly of thrust bearing 24

[0057] The operator tightens the two prepared jacking bolts 28 evenly by screwing them into the threaded holes of the bearing housing 22. The relative movement of the worm shaft 20 with respect to the gearbox 12 in the thrust direction is restricted by the first limiting member 30. Therefore, the bearing housing 22 retains the worm shaft 20 and is gradually pulled out from the thrust bearing hole 121 in the thrust direction. As a result, the thrust bearing 24, embedded inside the bearing housing 22, is pulled out from the worm shaft 20.

[0058] Third step: Removal of the first restrictive component 30

[0059] When the thrust bearing 24 is pulled out from the worm shaft 20, the operator removes the first restraining component 30.

[0060] Fourth step: Setting up auxiliary tools for bearing replacement

[0061] As a preparatory step for the installation of the thrust bearing 24, the operator places the second restraining component 40 on the traction machine 10. Figure 11This is a partially enlarged view showing the state in which the second limiting component is installed on the traction machine. Figure 12 This is a schematic diagram showing the state of the second limiting member installed on the traction machine as viewed from the motor section side towards the brake wheel.

[0062] As shown in these figures, the second limiting member 40 is arranged with its long side aligned with the axial direction of the worm shaft 20, and is positioned in an upwardly projecting orientation between the side portion 164 of the protrusion 163 of the brake wheel 16 and the side portion 142 of the motor portion 14. This restricts the relative movement of the brake wheel 16 and the worm shaft 20 fixed to it relative to the motor portion 14 and the gearbox 12 in the direction toward the ground.

[0063] Fifth step: Installation of thrust bearing 24

[0064] The operator installs the bearing housing 22 into the thrust bearing bore 121. Then, after performing known heating and cooling treatments on the new thrust bearing 24, the operator fits the thrust bearing 24 into the worm shaft 20 and inserts it into the bearing housing 22. The relative movement of the worm shaft 20 relative to the gearbox 12 in the ground direction is restricted by the second limiting member 40. Therefore, the thrust bearing 24 remains embedded deep within the bearing housing 22, retaining the worm shaft 20. As a result, the thrust bearing 24 is mounted on the worm shaft 20.

[0065] 4. The function and effect of auxiliary tools for bearing replacement

[0066] Using the bearing replacement auxiliary tools described above, the following functions and effects can be achieved.

[0067] When the thrust bearing 24 is pulled out of the gearbox 12, the first limiting member 30 is clamped between the brake wheel 16 and the gearbox 12 above the worm shaft 20, thereby limiting the relative movement of the worm shaft 20 relative to the gearbox 12. As a result, the efficiency of the operation of pulling out the thrust bearing 24 from the gearbox 12 is improved.

[0068] The first flat portion 302 and the second flat portion 304 of the first limiting member 30 are connected such that, when installed on the traction machine 10, the cross-section perpendicular to the long side direction forms an upwardly convex mountain shape. With this structure, the first limiting member 30 can be stably installed on the upper side of the worm shaft 20.

[0069] The first limiting member 30 is configured such that, in a cross-section perpendicular to the long side direction, the angle formed by the first flat portion 302 and the second flat portion 304 is a right angle. With this structure, the first limiting member 30 can be formed using a common L-shaped angle member, thus simplifying its fabrication. Furthermore, the first limiting member 30 ensures the strength of the resistance material when compressed along the long side direction.

[0070] The first limiting member 30 has a first chamfered portion 306 at the corner of the first flat portion 302 and the second flat portion 304. With this structure, when the first limiting member 30 is installed in a narrow section of the traction machine 10, corner snagging can be prevented, thus making installation easier and preventing damage to the traction machine 10. Furthermore, the first chamfered portion 306 also helps prevent injury to operators of the first limiting member 30.

[0071] When installing the thrust bearing 24 into the gearbox 12, the second limiting member 40 is clamped between the brake wheel 16 and the motor section 14 above the worm shaft 20, thereby limiting the relative movement of the worm shaft 20 relative to the motor section 14. This improves the efficiency of the operation of installing the thrust bearing 24 into the gearbox 12.

[0072] The first flat portion 402 and the second flat portion 404 of the second limiting member 40 are connected such that, when installed on the traction machine 10, the cross-section perpendicular to the long side direction forms an upwardly convex mountain shape. With this structure, the second limiting member 40 can be stably installed on the upper side of the worm shaft 20.

[0073] The second limiting member 40 is configured such that, in a cross-section perpendicular to the long side direction, the angle formed by the first flat portion 402 and the second flat portion 404 is a right angle. With this structure, the second limiting member 40 can be formed using a common L-shaped angle member, thus simplifying its fabrication. Furthermore, the second limiting member 40 ensures the strength of the resistance material when compressed along the long side direction.

[0074] The second limiting member 40 has second chamfered portions 406 at each of the two corners of the first flat portion 402 and the second flat portion 404. With this structure, when the second limiting member 40 is installed in a narrow section of the traction machine 10, corner snagging can be prevented, thus making installation easier and preventing damage to the traction machine 10. Furthermore, the second chamfered portions 406 also help prevent injury to operators of the second limiting member 40.

[0075] 5. Variations

[0076] The bearing replacement auxiliary tool in this embodiment can also be modified as follows.

[0077] The bearing replacement auxiliary tool may also be a structure that only has either the first limiting component 30 or the second limiting component 40.

[0078] The first limiting member 30 can also be configured to be located along the entire length between the side portion 123 on the ground side of the gearbox 12 and the end portion of the protrusion 162 opposite to the side portion 123, and configured to abut against the worm shaft 20.

[0079] The second limiting member 40 may also be disposed on the upper part of the protrusion 163 of the brake wheel 16, with its long side aligned with the axial direction of the worm shaft 20 and protruding upward. In this case, the total length of the long side of the second limiting member 40 is set to be slightly shorter than the distance between the side portion 142 of the brake wheel 16 side of the motor unit 14 and the side portion of the brake wheel 16 facing the side portion 142.

[0080] Label Explanation

[0081] 10: Traction machine; 12: Gearbox; 14: Motor section; 16: Brake wheel; 17: Rope pulley; 18: Bearing cover; 19: Cover bolt; 20: Worm shaft; 22: Bearing box; 24: Thrust bearing; 26: Ground bearing; 28: Lifting bolt; 30: First limiting component; 40: Second limiting component; 121: Thrust bearing hole; 122: Ground bearing hole; 123: Side part; 142: Side part; 161: Side part; 163: Protrusion; 164: Side part; 202: Worm gear; 302: First flat part; 304: Second flat part; 306: First chamfered part; 308: Label part; 402: First flat part; 404: Second flat part; 406: Second chamfered part; 408: Label part.

Claims

1. An auxiliary tool for replacing bearings in an elevator traction machine, used in the bearing replacement operation of the elevator traction machine, wherein, The traction mechanism comprises: Motor section; A worm shaft, one end of which is connected to the rotating shaft of the motor unit; A gearbox through which the worm shaft is inserted; A thrust bearing, mounted in the gearbox, supports the worm shaft; and A brake wheel, which is fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement auxiliary tool includes a first limiting component. When the thrust bearing is pulled out of the gearbox, the first limiting component is clamped between the brake wheel and the gearbox above the worm shaft, thereby limiting the relative movement of the brake wheel and the worm shaft fixed to the brake wheel relative to the gearbox. The first limiting member has a shape formed by two planes connected together, such that when it is configured in the traction machine, the cross section perpendicular to the long side direction becomes an upwardly convex mountain shape.

2. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 1, wherein, The two planes of the first limiting member are connected such that, in a cross section perpendicular to the long side direction, the angle formed by the two planes of the first limiting member is a right angle.

3. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 1 or 2, wherein, The first limiting member has a first chamfered portion at the corner of each of the two planes of the first limiting member.

4. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 1 or 2, wherein, The bearing replacement aid includes a second limiting component. When installing the thrust bearing into the gearbox, the second limiting component is clamped between the brake wheel and the motor above the worm shaft, thereby limiting the relative movement of the worm shaft relative to the motor.

5. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 4, wherein, The second limiting member has a shape formed by two planes connected together, such that when it is configured in the traction machine, the cross section perpendicular to the long side direction becomes an upwardly convex mountain shape.

6. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 5, wherein, The second limiting member is connected such that, in a cross section perpendicular to the long side direction, the angle between the two planes of the second limiting member is a right angle.

7. The auxiliary tool for replacing the bearings of an elevator traction machine according to claim 5, wherein, The second limiting member has a second chamfered portion at the corner of each of the two planes of the second limiting member.

8. A method for replacing the bearings of an elevator traction machine, wherein, The traction mechanism comprises: Motor section; A worm shaft, one end of which is connected to the rotating shaft of the motor unit; A gearbox through which the worm shaft is inserted; A thrust bearing, mounted in the gearbox, supports the worm shaft; and A brake wheel, which is fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement method includes the following steps: The first limiting component of the bearing replacement auxiliary tool for the elevator traction machine as described in claim 1 is disposed between the brake wheel and the gearbox; Pull the thrust bearing out of the worm shaft; and Remove the first limiting component from the traction machine.

9. A method for replacing the bearings of an elevator traction machine, wherein, The traction mechanism comprises: Motor section; A worm shaft, one end of which is connected to the rotating shaft of the motor unit; A gearbox through which the worm shaft is inserted; A thrust bearing, mounted in the gearbox, supports the worm shaft; and A brake wheel, which is fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement method includes the following steps: The second limiting component of the bearing replacement auxiliary tool for the elevator traction machine as described in claim 4 is disposed between the brake wheel and the motor unit; Install the thrust bearing onto the worm shaft; and Remove the second limiting component from the traction machine.

10. An auxiliary tool for replacing bearings in an elevator traction machine, used in the bearing replacement operation of the elevator traction machine, wherein... The traction mechanism comprises: Motor section; A worm shaft, one end of which is connected to the rotating shaft of the motor unit; A gearbox through which the worm shaft is inserted; A thrust bearing, mounted in the gearbox, supports the worm shaft; and A brake wheel, which is fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement auxiliary tool includes: The first limiting member, during the operation of pulling the thrust bearing out of the gearbox, is clamped above the worm shaft between the brake wheel and the gearbox, thereby limiting the relative movement of the brake wheel and the worm shaft fixed to the brake wheel relative to the gearbox; and The second limiting component, during the operation of installing the thrust bearing into the gearbox, is clamped above the worm shaft between the brake wheel and the motor unit, thereby restricting the relative movement of the worm shaft relative to the motor unit. The second limiting member has a shape formed by two planes connected together, such that when it is configured in the traction machine, the cross section perpendicular to the long side direction becomes an upwardly convex mountain shape.

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