Bearing replacement aid for elevator hoist and bearing replacement method

Abstract

Provided is a bearing replacement aid for limiting the relative movement of a worm shaft in the axial direction during the bearing replacement operation of an elevator hoist. The traction machine comprises a motor part; one end of the worm shaft is connected with a rotating shaft of the motor part; a gear box into which the worm shaft is inserted; a thrust part bearing that is attached to the gearbox and that supports the worm shaft; and a brake wheel fixed to the worm shaft between the gearbox and the motor unit. The bearing replacement aid is provided with a first restricting member that restricts the relative movement of the worm shaft with respect to the gear case by being sandwiched between the brake wheel and the gear case above the worm shaft when the thrust part bearing is pulled out from the gear case. Furthermore, the bearing replacement assist tool is provided with a second restricting member that restricts the relative movement of the worm shaft with respect to the motor part by being sandwiched between the brake wheel and the motor part above the worm shaft during the work of attaching the thrust part bearing to the gearbox.

Description

Technical Field

[0001] The present disclosure relates to a technique for assisting the bearing replacement operation of an elevator traction machine. Background Art

[0002] A technique related to an elevator traction machine is disclosed in Patent Document 1. In this technique, by using a support table and one bearing device to support the load applied to the rotor shaft, it is possible to remove the other bearing device and pull out the stator without using a lifting mechanism such as a crane, thereby disassembling the motor and the like.

[0003] Prior Art Documents

[0004] Patent Documents

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

[0006] Problems to be Solved by the Invention

[0007] Sometimes, the bearings of a worm traction machine for an elevator are firmly fitted to the worm shaft. In this case, during the operation of removing the bearing from the worm shaft, the worm shaft itself may move axially together with the bearing. To prevent this, it is considered to appropriately clamp a square timber or the like for countermeasures, but there are problems in terms of strength and usability. In the technique of Patent Document 1 above, no effective means for restricting the movement of the shaft when removing the bearing from the shaft is disclosed.

[0008] The present disclosure has been completed to solve the above problems, and an object thereof is to provide a bearing replacement auxiliary tool and a bearing replacement method that can restrict the relative axial movement of the worm shaft during the bearing replacement operation of an elevator traction machine.

[0009] Means for Solving the Problems

[0010] The present disclosure is applied to a bearing replacement auxiliary tool used in the bearing replacement operation of an elevator traction machine. The traction machine includes: a motor part; a worm shaft, one end of which is connected to the rotating shaft of the motor part; a gear box through which the worm shaft passes; a thrust bearing installed in the gear box to support the worm shaft; and a brake wheel fixed to the worm shaft between the gear box and the motor part. The bearing replacement auxiliary tool includes a first restricting member that, when performing the operation of pulling out the thrust bearing from the gear box, is clamped between the brake wheel and the gear box above the worm shaft to restrict the relative movement of the worm shaft with respect to the gear box.

[0011] In addition, the present disclosure is applied to a method for replacing bearings of an elevator traction machine. The traction machine 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 passes; a thrust bearing installed 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: setting a first restricting member between the brake wheel and the gearbox; pulling out the thrust bearing from the worm shaft; and removing the first restricting member from the traction machine.

[0012] In addition, the present disclosure is applied to a method for replacing bearings of an elevator traction machine. The traction machine 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 passes; a thrust bearing installed 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: setting a second restricting member between the brake wheel and the motor unit; installing the thrust bearing onto the worm shaft; and removing the second restricting member from the traction machine.

[0013] Advantages of the Invention

[0014] According to the bearing replacement assisting tool of the present disclosure, relative movement of the worm shaft in the axial direction can be restricted during the bearing replacement operation. As a result, the operation efficiency of the bearing replacement operation is improved. Brief Description of the Drawings

[0015] Figure 1 It is a view showing an external structure of a traction machine to which the bearing replacement assisting tool of the application embodiment is applied.

[0016] Figure 2 It is a schematic view showing an internal structure around the gearbox of the traction machine.

[0017] Figure 3 It is a schematic view for explaining the removal operation of the thrust bearing.

[0018] Figure 4 It is a perspective view showing the bearing replacement assisting tool of the traction machine of the present embodiment.

[0019] Figure 5 It is a three-view drawing of the first restricting member.

[0020] Figure 6 It is a three-view drawing of the second restricting member.

[0021] Figure 7 It is a schematic view showing a state where the first restricting member is arranged on the traction machine.

[0022] Figure 8 It is a schematic view showing a state where the second restricting member is arranged on the traction machine.

[0023] Figure 9 This is a view showing the state in which the first restricting member is provided on the traction machine.

[0024] Figure 10 This is a schematic view of observing the state in which the first restricting member is provided on the traction machine from the side of the gearbox toward the brake wheel through the gearbox.

[0025] Figure 11 This is a partially enlarged view showing the state in which the second restricting member is provided on the traction machine.

[0026] Figure 12 This is a schematic view of observing the state in which the second restricting member is provided on the traction machine from the side of the motor unit toward the brake wheel through the motor unit. Detailed implementation mode

[0027] Hereinafter, the implementation mode will be described with reference to the drawings. In addition, the same reference numerals are assigned to the elements common to the respective drawings, and redundant descriptions are omitted.

[0028] Implementation mode.

[0029] 1. Appearance structure of the traction machine applying the bearing replacement assisting tool of the implementation mode

[0030] Figure 1 This is a view showing the appearance structure of the traction machine applying the bearing replacement assisting tool of the implementation mode. Figure 2 This is a schematic view showing the internal structure around the gearbox of the traction machine. The traction machine 10 is a worm traction machine for an elevator. The traction machine 10 is provided in the machine room of the elevator.

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

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

[0033] The gearbox 12 includes a bearing housing 22 that houses a thrust bearing 24. The bearing housing 22 is inserted into the thrust bearing hole 121 in a state where the thrust bearing 24 is housed inside. A bearing cover 18 is installed at the opening of the bearing housing 22 by a cover bolt 19. A ground bearing 26 is inserted into the ground bearing hole 122.

[0034] The worm shaft 20 penetrates from the ground side to the thrust side of the gearbox 12 and is supported by the thrust bearing 24 and the ground bearing 26. The worm wheel 202 of the worm shaft 20 meshes with an unillustrated interlocking gear within the gearbox 12. The interlocking gear transmits the rotational force of the worm shaft 20 to the traction sheave 17. In the following description, the direction from the ground side to the thrust side in the axial direction of the worm shaft 20 is referred to as the "thrust direction", and the direction from the thrust side to the ground side is referred to as the "ground direction".

[0035] The motor unit 14 is detachably attached to the structure of the traction machine 10 by bolts. The end on the ground side 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 is a component fixed so as to rotate together with the worm shaft 20. The brake wheel 16 is disposed between the gearbox 12 of the worm shaft 20 and the motor unit 14.

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

[0038] The thrust bearing 24 and the ground bearing 26 of the traction machine 10 are sometimes replaced. Figure 3 It is a schematic diagram for explaining the removal operation of the thrust bearing. In the case of removing the thrust bearing 24, first, the operator removes the cover bolts 19 and detaches the bearing cover 18. Then, two prepared jack bolts 28 are respectively screwed into the threaded holes of the bearing housing 22 and evenly tightened. As a result, the bearing housing 22 and the thrust bearing 24 are gradually pulled out from the thrust bearing hole 121 of the worm shaft 20 in the thrust direction.

[0039] Here, the thrust bearing 24 is firmly fitted to the worm shaft 20. Therefore, when the thrust bearing 24 is pulled out in the thrust direction, the worm shaft 20 may sometimes be pulled in the thrust direction as well. To solve such a problem, it is considered that during the pulling operation of the bearing housing 22, for example, a suitable square timber such as wood is sandwiched between the wall surface on the ground side of the gearbox 12 and the wall surface of the brake wheel 16 to restrict the relative movement of the brake wheel 16 with respect to the gearbox 12. However, square timbers such as wood have problems in terms of strength and usability.

[0040] The bearing replacement auxiliary tool of the present embodiment is an auxiliary tool for restricting the relative movement of the worm shaft 20 with respect to the gearbox 12 during the replacement operation of the thrust bearing 24. Figure 4 It is a perspective view showing the bearing replacement auxiliary tool of the traction machine of the present embodiment. The bearing replacement auxiliary tool includes a first restricting member 30 and a second restricting member 40. Figure 5 It is the three-view drawing of the first restricting member. Figure 6 It is the three-view drawing of the second restricting member.

[0041] The first restricting member 30 is an auxiliary tool used while being clamped between the brake wheel 16 and the ground side of the gearbox 12 above the worm shaft 20. The first restricting 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 in the long side direction is connected to each other so that a cross section perpendicular to the long side direction becomes a mountain shape. The angle formed by the first flat portion 302 and the second flat portion 304 is not limited. Typically, the two planes of the first restricting member 30 are connected 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. The first restricting member 30 can be made of, for example, an L-shaped angle bar of L3×30×30 mm.

[0042] The overall length of the first restricting member 30 in the long side direction is set in consideration of the positional relationship between the gearbox 12 of the traction machine 10 and the brake wheel 16. Figure 7 It is a schematic view showing a case where the first restricting member is arranged on the traction machine. As shown in this figure, the first restricting member 30 is set to such an overall length that its long side direction is housed between the ground side of the gearbox 12 of the traction machine 10 and the brake wheel 16 above the worm shaft 20. Typically, the overall length of the first restricting member 30 in the long side direction is set to a length slightly shorter than the distance between the side surface portion 123 on the ground side of the gearbox 12 and the side surface portion 161 of the brake wheel 16 facing this side surface portion. The overall length of the first restricting member 30 in the long side direction is, for example, 70 mm.

[0043] The first restricting member 30 has first chamfered portions 306 at two corner portions on the edge side of the first flat portion 302. Similarly, the first restricting member 30 has first chamfered portions 306 at two corner portions on the edge side of the second flat portion 304. The shape and size of the first chamfered portions 306 are not limited. Here, the first chamfered portions 306 are formed within a range of approximately 1 / 3 of the length in the short side direction of the first flat portion 302 and the second flat portion 304. In the case where the first restricting member 30 is an L-shaped angle bar of L3×30×30, for example, one side of the first chamfered portion 306 is 10 mm.

[0044] A label portion 308 indicating "ground side" is attached to the first flat 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 portion 302. The color of the label portion 308 is preferably an easily visually recognizable color such as a fluorescent color. In addition, in the first restricting member 30, the structure of the label portion 308 is not essential.

[0045] The second limiting member 40 is an auxiliary tool used by being sandwiched between the brake wheel 16 and the motor unit 14 above the worm shaft 20. For example, the structure of the second limiting member 40 can adopt the same structure as the first limiting member 30 except for the overall 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 formed by 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 such that in the 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. The second limiting member 40 can be, for example, an L-shaped angle bar of L3×30×30mm.

[0046] The overall length of the second limiting member 40 in the long side direction is set in consideration of the positional relationship between the motor unit 14 and the brake wheel 16 of the traction machine 10. Figure 8 It is a schematic diagram showing the case where the second limiting member is arranged on the traction machine. As shown in this figure, the brake wheel 16 has a protruding portion 163 that protrudes cylindrically in the ground direction of the worm shaft 20 at the central portion where the worm shaft 20 is fixed. The overall length of the second limiting member 40 in the long side direction is set to a length slightly shorter than the distance between the side surface portion 142 on the brake wheel 16 side of the motor unit 14 and the side surface portion 164 of the protruding portion 163 facing the side surface portion 142. The overall length of the second limiting member 40 in the long side direction is, for example, 80mm.

[0047] The second limiting member 40 has second chamfering portions 406 at two corner portions on the edge side of the first flat portion 402. Similarly, the second limiting member 40 has second chamfering portions 406 at two corner portions on the edge side of the second flat portion 404. The size of the second chamfering portion 406 is not limited. Here, the second chamfering portion 406 is formed within a range of approximately 1 / 3 of the length in the short side direction of the first flat portion 402 and the second flat portion 404. In the case where the second limiting member 40 is an L-shaped angle bar of L3×30×30, for example, one side of the second chamfering portion 406 is 10mm.

[0048] A label portion 408 marked with "motor side" is attached to the first flat portion 402. The shape, size, and color of the label portion 408 are not limited. The label portion 408 can also cover the entire surface of the first flat portion 402. The color of the label portion 408 is preferably an easily visually recognizable color such as a fluorescent color. In addition, in the second limiting member 40, the structure of the label portion 408 is not necessary.

[0049] 3. Operating steps for replacing the bearing of the bearing replacement auxiliary tool

[0050] Next, the disassembly method and installation method of the thrust bearing 24 of the bearing replacement auxiliary tool for the usage embodiment will be described in detail. In addition, there are various processes for the disassembly method and installation method of the thrust bearing 24 other than the processes shown below, but the description thereof is omitted here.

[0051] Preparation process: Disassembly process of the bearing cover

[0052] The operator removes the cover bolts 19 and removes the bearing cover 18. As a result, the thrust bearing 24 embedded inside the bearing housing is exposed.

[0053] First process: Setting process of the first restricting member

[0054] The operator sets the first restricting member 30 on the traction machine 10. Figure 9 The figure shows the state where the first restricting member is set on the traction machine. Figure 10 The figure is a schematic view of observing the state where the first restricting member is set on the traction machine from the side of the gearbox through the gearbox toward the brake wheel.

[0055] As shown in these figures, the brake wheel 16 has a protruding portion 162 that protrudes cylindrically in the thrust direction at the center where the worm shaft 20 is fixed. The first restricting member 30 is arranged on the upper part of the protruding portion 162 of the brake wheel 16 so that the long side direction is aligned with the axial direction of the worm shaft 20 and protrudes upward. Thereby, the relative movement of the brake wheel 16 and the worm shaft 20 fixed to the brake wheel 16 in the thrust direction with respect to the gearbox 12 is restricted.

[0056] Second process: Disassembly process of the thrust bearing 24

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

[0058] Third process: Removal process of the first restricting member 30

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

[0060] Fourth process: Setting process of the bearing replacement auxiliary tool

[0061] As a preparation process for the installation process of the thrust bearing 24, the operator sets the second restricting member 40 on the traction machine 10. Figure 11It is a partial enlarged view showing the state where the second restricting member is provided on the traction machine. Figure 12 It is a schematic view showing the state where the second restricting member is provided on the traction machine as viewed from the side of the motor portion through the motor portion toward the brake wheel.

[0062] As shown in these figures, the second restricting member 40 is arranged in a convex upward orientation between the side surface portion 164 of the protruding portion 163 of the brake wheel 16 and the side surface portion 142 of the motor portion 14 on the basis that the long side direction is aligned with the axial direction of the worm shaft 20. Thereby, the relative movement of the brake wheel 16 and the worm shaft 20 fixed to the brake wheel 16 with respect to the motor portion 14 and the gearbox 12 in the ground direction is restricted.

[0063] Fifth process: Installation process of the thrust portion bearing 24

[0064] The operator installs the bearing housing 22 in the thrust portion bearing hole 121. Then, after performing known heating and cooling treatments on the new thrust portion bearing 24, the operator fits the thrust portion bearing 24 onto the worm shaft 20 and inserts it into the bearing housing 22. The relative movement of the worm shaft 20 with respect to the gearbox 12 in the ground direction is restricted by the second restricting member 40. Therefore, the thrust portion bearing 24 is retained by the worm shaft 20 and inserted deep into the bearing housing 22. As a result, the thrust portion bearing 24 is installed on the worm shaft 20.

[0065] 4. Functions and effects of the bearing replacement auxiliary tool

[0066] According to the bearing replacement auxiliary tool as described above, the following functions and effects can be obtained.

[0067] When performing the operation of pulling out the thrust portion bearing 24 from the gearbox 12, the first restricting member 30 is clamped between the brake wheel 16 and the gearbox 12 above the worm shaft 20 and can restrict the relative movement of the worm shaft 20 with respect to the gearbox 12. Thereby, the working efficiency of the operation of pulling out the thrust portion bearing 24 from the gearbox 12 is improved.

[0068] The first flat portion 302 and the second flat portion 304 of the first restricting member 30 are connected such that in the state of being provided on the traction machine 10, the cross section perpendicular to the long side direction is a mountain shape protruding upward. According to such a structure, the first restricting member 30 can be stably provided above the worm shaft 20.

[0069] The first restricting member 30 is configured such that in the 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. According to such a structure, the first restricting member 30 can be formed using a general L-shaped angle bar, so the production of the first restricting member 30 becomes easy. In addition, the first restricting member 30 ensures the strength as a resistance material when being compressed in the long side direction.

[0070] The first restricting member 30 has a first chamfered portion 306 at the corner of the first flat portion 302 and the second flat portion 304. With such a structure, when the first restricting member 30 is disposed in the narrow portion of the traction machine 10, hooking at the corner can be prevented, so that the setting becomes easy, and damage to the traction machine 10 can be prevented. Also, the first chamfered portion 306 helps to prevent an operator who operates the first restricting member 30 from being injured.

[0071] When performing the operation of mounting the thrust bearing 24 on the gearbox 12, the second restricting member 40 is sandwiched between the brake wheel 16 and the motor portion 14 above the worm shaft 20 and can restrict the relative movement of the worm shaft 20 with respect to the motor portion 14. Thereby, the working efficiency of the operation of mounting the thrust bearing 24 on the gearbox 12 is improved.

[0072] The first flat portion 402 and the second flat portion 404 of the second restricting member 40 are connected such that in a state of being disposed on the traction machine 10, a cross section perpendicular to the long side direction is a mountain shape protruding upward. With such a structure, the second restricting member 40 can be stably disposed on the upper side of the worm shaft 20.

[0073] The second restricting 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 such a structure, the second restricting member 40 can be formed using a general L-shaped angle bar, so that the production of the second restricting member 40 becomes easy. In addition, the second restricting member 40 ensures the strength as a resistance material when being compressed in the long side direction.

[0074] The second restricting member 40 has second chamfered portions 406 at both corners of the first flat portion 402 and the second flat portion 404 respectively. With such a structure, when the second restricting member 40 is disposed in the narrow portion of the traction machine 10, hooking at the corner can be prevented, so that the setting becomes easy, and damage to the traction machine 10 can be prevented. Also, the second chamfered portion 406 helps to prevent an operator who operates the second restricting member 40 from being injured.

[0075] 5. Modification

[0076] The bearing replacement assisting tool of the present embodiment may also adopt the following modified forms.

[0077] The bearing replacement assisting tool may also be a structure that only includes any one of the first restricting member 30 and the second restricting member 40.

[0078] The first limiting member 30 can also be set to have a full length that can be disposed between the side surface portion 123 on the ground side of the gearbox 12 and the end surface portion of the protruding portion 162 facing the side surface portion 123, and is configured to abut against the worm shaft 20.

[0079] The second limiting member 40 can also be disposed above the protruding portion 163 of the brake wheel 16 with the long side direction thereof being aligned with the axial direction of the worm shaft 20 and protruding upward. In this case, the full length in the long side direction of the second limiting member 40 may be set to a length slightly shorter than the distance between the side surface portion 142 on the brake wheel 16 side of the motor unit 14 and the side surface of the brake wheel 16 facing the side surface portion 142.

[0080] Reference Numeral Description

[0081] 10: Traction machine, 12: Gearbox, 14: Motor unit, 16: Brake wheel, 17: Rope wheel, 18: Bearing cover, 19: Cover bolt, 20: Worm shaft, 22: Bearing housing, 24: Thrust bearing, 26: Ground bearing, 28: Jacking bolt, 30: First limiting member, 40: Second limiting member, 121: Thrust bearing hole, 122: Ground bearing hole, 123: Side surface portion, 142: Side surface portion, 161: Side surface portion, 163: Protruding portion, 164: Side surface portion, 202: Worm gear, 302: First flat portion, 304: Second flat portion, 306: First chamfered portion, 308: Label portion, 402: First flat portion, 404: Second flat portion, 406: Second chamfered portion, 408: Label portion.

Claims

1. An auxiliary tool for replacing the bearing of an elevator traction machine, which is used in the operation of replacing the bearing of an elevator traction machine. Among them, The traction machine is configured to include: A motor part; A worm shaft, one end of which is connected to the rotating shaft of the motor part; A gear box through which the worm shaft is inserted; A thrust bearing installed in the gear box to support the worm shaft; and A brake wheel fixed to the worm shaft between the gear box and the motor part, The bearing replacement auxiliary tool is equipped with a first limiting component. When performing the operation of pulling out the thrust bearing from the gear box, the first limiting component is clamped between the brake wheel and the gear box above the worm shaft to limit the relative movement of the worm shaft relative to the gear box.

2. The bearing replacement auxiliary tool for an elevator traction machine according to claim 1, Among them, The first limiting component has a shape formed by connecting two planes, so that in the state of being arranged on the traction machine, the cross-section perpendicular to the long side direction is a mountain shape protruding upward.

3. The bearing replacement auxiliary tool for an elevator traction machine according to claim 2, Among them, The two planes of the first limiting component are connected such that in the cross-section perpendicular to the long side direction, the angle formed by the two planes of the first limiting component is a right angle.

4. The bearing replacement auxiliary tool for an elevator traction machine according to claim 2 or 3, Among them, The first limiting component has a first chamfering part at each corner of the two planes of the first limiting component.

5. The bearing replacement auxiliary tool for an elevator traction machine according to any one of claims 1 to 4, Among them, The bearing replacement auxiliary tool is equipped with a second limiting component. When performing the operation of installing the thrust bearing on the gear box, the second limiting component is clamped between the brake wheel and the motor part above the worm shaft to limit the relative movement of the worm shaft relative to the motor part.

6. The bearing replacement auxiliary tool for an elevator traction machine according to claim 5, Among them, The second limiting component has a shape formed by connecting two planes, so that in the state of being arranged on the traction machine, the cross-section perpendicular to the long side direction is a mountain shape protruding upward.

7. The bearing replacement auxiliary tool for an elevator traction machine according to claim 6, Among them, The second limiting component is connected such that in the cross-section perpendicular to the long side direction, the angle formed by the two planes of the second limiting component is a right angle.

8. The bearing replacement auxiliary tool for an elevator traction machine according to claim 6 or 7, Among them, The second limiting component has a second chamfering part at each corner of the two planes of the second limiting component.

9. A method for replacing the bearing of an elevator traction machine, Among them, The traction machine is configured to include: A motor part; A worm shaft, one end of which is connected to the rotating shaft of the motor part; A gear box through which the worm shaft is inserted; A thrust bearing installed in the gear box to support the worm shaft; and A brake wheel fixed to the worm shaft between the gear box and the motor part, The bearing replacement method includes the following processes: Set the first restricting member according to any one of claims 1 to 4 between the brake wheel and the gearbox; Pull out the thrust bearing from the worm shaft; and Remove the first restricting member from the traction machine.

10. A bearing replacement method for a traction machine of an elevator, wherein, The traction machine is configured to include: A motor part; A worm shaft, one end of which is connected to the rotating shaft of the motor part; A gearbox through which the worm shaft penetrates; A thrust bearing installed in the gearbox to support the worm shaft; and A brake wheel fixed to the worm shaft between the gearbox and the motor part, The bearing replacement method includes the following processes: Set the second restricting member according to any one of claims 5 to 8 between the brake wheel and the motor part; Install the thrust bearing onto the worm shaft; and Remove the second restricting member from the traction machine.

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