Hoist and elevator

Abstract

The traction machine comprises a machine base, a rotating shaft, a rotor, a stator, a traction wheel and a brake, the rotating shaft is installed on the machine base through at least two bearings, and at least part of the rotating shaft extends out of the machine base; the rotor comprises a connecting part in transmission connection with the part, extending out of the base, of the rotating shaft, an extension part extending from the outer edge of the connecting part to the periphery and a magnet yoke part extending from the outer edge of the extension part in the direction parallel to the axial direction of the rotating shaft and close to the bearing, and the stator is installed on the side, facing the extension part, of the base and located on the inner side of the magnet yoke part; according to the technical scheme, the rotor and the traction wheel can be independent from each other, so that the dead weight of the rotor is reduced, the rotation speed of the rotor is increased, and the service life of the rotor is prolonged. Furthermore, the gravity center shift degree of the rotor is small when the rotor rotates, so that the stability of the rotor is better when the rotor moves at a high speed, and the stability of the traction machine during working is improved.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and in particular to a traction machine and an elevator. Background Art

[0002] The traction machine is an elevator traction power device that connects and pulls the car through a steel wire rope. It is the power source that enables the car to move up and down. Existing traction machines generally include a machine base and a traction wheel, a main shaft, a rotor and a stator arranged on the machine base. Among them, according to the different matching structures of the rotor and the stator, they can generally be divided into traction machines with inner rotor structures and traction machines with outer rotor structures.

[0003] In order to improve the heat dissipation performance and torque, an outer rotor traction machine is usually used. However, in the related art, the traction wheel is directly set on the outer peripheral wall of the rotor, which requires the rotor to be bent to form a portion that interacts with the stator, and this portion needs to be offset from the connection portion with the main shaft toward the direction of the stator. In this case, the rotor has a long extension path and a large deadweight, and the center of gravity of the rotor is greatly offset when it rotates, resulting in poor stability during high-speed movement, resulting in poor stability of the traction machine when it is working. Summary of the invention

[0004] The embodiments of the present application provide a traction machine and an elevator, aiming to improve the problem of poor stability of the traction machine during operation.

[0005] In order to solve the above technical problems, an embodiment of the present application provides a traction machine, comprising:

[0006] Machine base;

[0007] A rotating shaft, mounted on the machine base through at least two bearings and at least partially extending out of the machine base;

[0008] The rotor comprises a connecting portion drivingly connected to the portion of the rotating shaft extending out of the base, an extension portion extending from the outer edge of the connecting portion to all sides, and a yoke portion extending from the outer edge of the extension portion in a direction parallel to the axial direction of the rotating shaft and close to the bearing;

[0009] A stator is mounted on a side of the base facing the extension portion and is located on an inner side of the yoke portion;

[0010] a traction wheel, drivingly connected to the rotating shaft and located between two adjacent bearings; and

[0011] The brake is drivingly connected to one end of the rotating shaft in the axial direction.

[0012] In some of the embodiments, the brake is located on a side of the base facing away from the stator.

[0013] In some of the embodiments, the base comprises:

[0014] A support frame having a receiving cavity;

[0015] a brake disc end cover, having a first mounting hole and mounted on one end of the support frame in the axial direction of the rotating shaft; and

[0016] The core seat has a second mounting hole and is mounted on the other end of the support frame in the axial direction of the rotating shaft;

[0017] Wherein, the brake is installed on the surface of the brake disc facing away from the accommodating cavity, the stator core is installed on the surface of the core seat facing away from the accommodating cavity, the traction wheel is located in the accommodating cavity, and the first mounting hole and the second mounting hole are both installed with the bearing.

[0018] In some embodiments, one of the core seat and the brake disc end cover is integrally formed with the support frame.

[0019] In some of the embodiments, the machine base is provided with an annular mounting portion, the stator is sleeved on an outer peripheral wall of the annular mounting portion, and the rotating shaft is at least partially located on an inner side of the annular mounting portion.

[0020] In some of the embodiments, a plurality of reinforcing ribs are disposed on the inner wall surface of the annular mounting portion, and the plurality of reinforcing ribs are spaced apart along the circumference of the rotating shaft.

[0021] In some of the embodiments, the outer peripheral wall of the machine base is provided with an avoidance hole, and the avoidance hole is used for the steel rope to extend into the machine base and cooperate with the traction wheel;

[0022] The traction wheel is provided with a plurality of first through holes along the axial direction of the rotating shaft, and the plurality of first through holes are arranged at intervals along the circumference of the traction wheel.

[0023] In some of the embodiments, the traction wheel is provided with at least one reinforcing rib between two adjacent avoidance holes.

[0024] In some embodiments, the extension portion is provided with a heat dissipation hole, and a second through hole is provided on a surface of the base facing the extension portion.

[0025] In some of the embodiments, it also includes:

[0026] A protective cover is installed on the machine base. The protective cover and the machine base are jointly arranged to form a protective cavity. The rotor is located in the protective cavity.

[0027] In some of the embodiments, a first limiting protrusion is further provided on the inner surface of the base, and the first limiting protrusion abuts against a surface of at least one of the bearings facing away from the traction wheel.

[0028] In some of the embodiments, a second limiting protrusion is convexly formed on the outer peripheral wall of the rotating shaft, and the second limiting protrusion is in contact with at least one surface of the bearing close to the traction wheel.

[0029] In some of the embodiments, a third limiting protrusion is convexly provided on the outer peripheral wall of the rotating shaft, and the third limiting protrusion abuts against the surface of the connecting portion close to the traction wheel.

[0030] The present application also provides an elevator, comprising:

[0031] Car;

[0032] Steel rope; and

[0033] In the above-mentioned traction machine, the traction wheel is connected to the car through the steel rope to drive the car to rise and fall.

[0034] The traction machine in the embodiment of the present application can make the rotor and the traction wheel independent of each other, thereby reducing the dead weight of the rotor. When the rotor rotates, the center of gravity of the rotor is less offset, making the rotor more stable when moving at high speed, thereby improving the stability of the traction machine during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of the structure of a traction machine provided in an embodiment of the present application;

[0037] Figure 2 An exploded view of the traction machine in the embodiment of the present application;

[0038] Figure 3 A cross-sectional view of a traction machine in an embodiment of the present application;

[0039] Figure 4 This is a schematic diagram of the structure of the base in the embodiment of the present application;

[0040] Figure 5 A cross-sectional view of the base in the embodiment of the present application;

[0041] Figure 6 This is a schematic diagram of the structure of the traction wheel in the embodiment of the present application;

[0042] Figure 7It is a schematic diagram of the structure of the rotating shaft in the embodiment of the present application.

[0043] Description of reference numerals:

[0044] 1. Traction machine; 11. Machine base; 111. Support frame; 1111. Accommodation cavity; 112. Brake disc end cover; 1121. First mounting hole; 113. Core seat; 1131. Second mounting hole; 114. Annular mounting part; 1141. Reinforcement rib; 115. Avoidance hole; 116. Second through hole; 117. First limiting convex part; 12. Rotating shaft; 121. Second limiting convex part; 122. Third limiting convex part; 13. Rotor; 131. Connecting part; 132. Extended part; 1321. Heat dissipation hole; 133. Yoke part; 14. Stator; 15. Traction wheel; 151. First through hole; 152. Reinforcement rib; 16. Brake; 17. Bearing; 18. Protective cover; 19. Protective cavity. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] The traction machine is an elevator traction power device that connects and pulls the car through a steel wire rope. It is the power source that enables the car to move up and down. Existing traction machines generally include a machine base and a traction wheel, a main shaft, a rotor and a stator arranged on the machine base. Among them, according to the different matching structures of the rotor and the stator, they can generally be divided into traction machines with inner rotor structures and traction machines with outer rotor structures.

[0047] In order to improve the heat dissipation performance and torque, an outer rotor traction machine is usually used. However, in the related art, the traction wheel is directly set on the outer peripheral wall of the rotor, which requires the rotor to be bent to form a portion that interacts with the stator, and this portion needs to be offset from the connection portion with the main shaft toward the direction of the stator. In this case, the rotor has a long extension path and a large deadweight, and the center of gravity of the rotor is greatly offset when it rotates, resulting in poor stability during high-speed movement, resulting in poor stability of the traction machine when it is working.

[0048] To solve the above problems, please refer to Figure 1 The embodiment of the present application provides a traction machine 1 and an elevator. The elevator includes a car, a steel rope and a traction machine 1. The traction wheel 15 is connected to the car through the steel rope to drive the car to rise and fall.

[0049] See also Figure 2The traction machine 1 includes a base 11, a rotating shaft 12, a rotor 13, a stator 14, a traction wheel 15 and a brake 16. The base 11 is used to support the rotating shaft 12, the rotor 13, the stator 14, the traction wheel 15 and the brake 16. When the traction wheel 15 is connected to the car through a wire rope, the base 11 also needs to support the weight of the wire rope and the car. Therefore, the base 11 is preferably made of a material with high strength, good toughness, fatigue resistance, wear resistance and the like, such as cast iron material, steel, aluminum alloy material, engineering plastics and the like.

[0050] See also Figure 3 The rotating shaft 12 is mounted on the machine base 11 through at least two bearings 17, and at least partially extends out of the machine base 11. It can be understood that the rotating shaft 12 can rotate relative to the machine base 11 through the bearings 17, and all the bearings 17 are concentrically arranged. The rotating shaft 12 can be mounted on the machine base 11 through two bearings 17, the rotating shaft 12 can also be mounted on the machine base 11 through three bearings 17, and the rotating shaft 12 can also be mounted on the machine base 11 through more bearings 17, which is not specifically limited here.

[0051] It should be noted that the rotating shaft 12 at least partially extends out of the machine base 11. One end of the rotating shaft 12 in the axial direction may pass through the rotating shaft 12 and extend out of the machine base 11, or both ends of the rotating shaft 12 in the axial direction may pass through the corresponding rotating shaft 12 and extend out of the machine base 11. No specific limitation is made here.

[0052] See also Figure 3 The rotor 13 includes a connecting portion 131, an extension portion 132 and a yoke portion 133. The connecting portion 131 is in transmission connection with the portion of the rotating shaft 12 extending out of the base 11. When the rotor 13 rotates, the rotating shaft 12 can be driven to rotate together through the connecting portion 131. The extension portion 132 is formed by the outer edge of the connecting portion 131 expanding in all directions. The extension portion 132 can be composed of a plurality of bar-shaped protrusions, or the extension portion 132 can be in a circular ring shape, which is not specifically limited here. The yoke portion 133 is formed by the outer edge of the extension portion 132 extending in a direction parallel to the axial direction of the rotating shaft 12 and close to the bearing 17. The yoke portion 133 can be composed of a plurality of bar-shaped protrusions, or the yoke portion 133 can be a surface extending in a circular shape along the circumferential direction of the rotating shaft 12, which is not specifically limited here.

[0053] See also Figure 3The stator 14 is installed on the side of the base 11 facing the extension part 132 and is located on the inner side of the yoke part 133. It can be understood that the stator 14 is located in the cover-shaped structure formed by the extension part 132 and the yoke part 133, and the yoke part 133 is located on the outer peripheral side of the stator 14. One of the yoke part 133 and the stator 14 is provided with a coil winding, and the other of the yoke part 133 and the stator 14 is provided with a magnetic pole. The magnetism of the coil winding is changed by changing the current flow direction in the coil winding and matching the magnetic pole to drive the rotor 13 to rotate. Preferably, the yoke part 133 is provided with a magnetic pole, and the stator 14 is provided with a coil winding, so that a brushless outer rotor 13 motor can be formed, thereby simplifying the structure of the traction machine 1.

[0054] There are many ways to install the stator 14 on the base 11. The stator 14 can be installed on the base 11 by screw connection, or by snap-fitting. The stator 14 can also be installed on the base 11 by other ways, which are not specifically limited here.

[0055] The traction sheave 15 is connected to the rotating shaft 12 by transmission and is located between two adjacent bearings 17. When the rotating shaft 12 rotates, the traction sheave 15 can be driven to rotate, and the traction sheave 15 drives the steel rope to move to drive the car to move. The outer peripheral side of the traction sheave 15 is usually provided with a plurality of grooves arranged at intervals along the axial direction. The grooves can be semicircular grooves, wedge-shaped grooves, or other shapes, which are not specifically limited here. The traction sheave 15 can be made of metal materials, polymer materials, or composite materials, which are not specifically limited here.

[0056] See also Figure 3 The rotating shaft 12 is installed on the machine base 11 through at least two bearings 17, so the bearings 17 are located in the machine base 11, and the traction sheave 15 is located between two adjacent bearings 17, so the traction sheave 15 is located in the machine base 11. The traction sheave 15 cooperates with the steel rope, and the steel rope cooperates with the car. Preferably, the machine base 11 is provided with an avoidance hole 115 to facilitate the steel rope to pass through the machine base 11 and cooperate with the traction sheave 15. It can be understood that the rotating shaft 12, the bearings 17, the traction sheave 15 and the rotor 13 are all coaxially arranged.

[0057] The brake 16 is connected to one end of the rotating shaft 12 in the axial direction by transmission. The brake 16 is an important guarantee for the safe operation of the car. The brake 16 can be electromagnetic, hydraulic, or mechanical, and no specific limitation is made here. It should be noted that the two ends of the rotating shaft 12 in the axial direction can be one end connected to the bearing 17, and the other end passes through the traction wheel 15, the remaining bearings 17, the base 11 and the rotor 13 to connect with the brake 16. The two ends of the rotating shaft 12 in the axial direction can also be one end connected to the rotor 13, and the other end passes through the bearing 17, the traction wheel 15 and the base 11 to connect with the brake 16. The two ends of the rotating shaft 12 in the axial direction can also be one end located outside the base 11, and the other end passes through the bearing 17, the traction wheel 15, the base 11 and the rotor 13 to connect with the brake 16, and no specific limitation is made here.

[0058] Preferably, see Figure 3 The brake 16 is located on the side of the base 11 facing away from the stator 14. It can be understood that the brake 16 and the stator 14 are respectively located on both sides of the base 11 in the axial direction of the rotating shaft 12. In this way, the center of gravity of the overall structure of the traction machine 1 can be stabilized, and the distance between the brake 16 and the base 11 can be shortened, thereby reducing the bending moment caused by the weight of the brake 16 on the rotating shaft 12.

[0059] During the operation of the traction sheave 15, the stator 14 cooperates with the rotor 13 to make the rotor 13 rotate, the rotor 13 drives the rotating shaft 12 to rotate through the connecting portion 131, and the rotating shaft 12 drives the traction sheave 15 to rotate. When it is necessary to stop the traction sheave 15 from rotating, the brake 16 drives the rotating shaft 12 to stop rotating to stop the traction sheave 15 from rotating.

[0060] The traction machine 1 in the embodiment of the present application can make the rotor 13 and the traction wheel 15 independent of each other, thereby reducing the dead weight of the rotor 13. When the rotor 13 rotates, the center of gravity of the rotor 13 is less offset, so that the rotor 13 has better stability when moving at high speed, thereby improving the stability of the traction machine 1 during operation.

[0061] Please also read Figure 2 , Figure 4 as well as Figure 5Specifically, the machine base 11 includes a support frame 111, a brake disc end cover 112 and a core seat 113, the support frame 111 is provided with a accommodating cavity 1111, the brake disc end cover 112 has a first mounting hole 1121, and is mounted on one end of the support frame 111 in the axial direction of the rotating shaft 12, the core seat 113 has a second mounting hole 1131, and is mounted on the other end of the support frame 111 in the axial direction of the rotating shaft 12, wherein the brake 16 is mounted on the surface of the brake disc facing away from the accommodating cavity 1111, the stator 14 core is mounted on the surface of the core seat 113 facing away from the accommodating cavity 1111, the traction wheel 15 is located in the accommodating cavity 1111, and the first mounting hole 1121 and the second mounting hole 1131 are both installed with bearings 17.

[0062] With such arrangement, during the assembly process of the traction machine 1, the traction wheel 15 can be placed in the accommodating chamber 1111 first, and then the brake disc end cover 112 and the core seat 113 can be respectively installed on the two ends of the support frame 111 in the axial direction of the rotating shaft 12, thereby facilitating the assembly of the traction machine 1. A bearing 17 is arranged in the first mounting hole 1121 of the brake disc end cover 112, which can reduce the distance between the brake 16 and the adjacent bearing 17, thereby reducing the bending moment generated by the weight of the brake 16 on the rotating shaft 12. A bearing 17 is arranged in the second mounting hole 1131 of the core seat 113, which can reduce the distance between the rotor 13 and the adjacent bearing 17, thereby reducing the bending moment generated by the weight of the rotor 13 on the rotating shaft 12.

[0063] For further information, see Figure 3 The core seat 113 and one of the brake disc end cover 112 are integrally formed with the support frame 111. With this arrangement, the step of installing one of the core seat 113 and the brake disc on the support frame 111 can be reduced during the assembly process of the traction machine 1, thereby improving the assembly efficiency of the traction machine 1.

[0064] It should be noted that when the core seat 113 and the support frame 111 are integrally formed, the brake disc end cover 112 and the support frame 111 are detachably connected. At this time, during the assembly of the traction machine 1, the traction wheel 15 is placed in the accommodating cavity 1111 through the connection between the brake disc end cover 112 and the support frame 111, and then the brake disc end cover 112 is installed on the support frame 111. When the brake disc end cover 112 and the support frame 111 are integrally formed, the core seat 113 and the support frame 111 are detachably connected. At this time, during the assembly of the traction machine 1, the traction wheel 15 is placed in the accommodating cavity 1111 through the connection between the core seat 113 and the support frame 111, and then the core seat 113 is installed on the support frame 111.

[0065] Please also read Figures 3 to 5In some embodiments of the present application, the machine base 11 is provided with an annular mounting portion 114, the stator 14 is sleeved on the outer peripheral wall of the annular mounting portion 114, and the rotating shaft 12 is at least partially located on the inner side of the annular mounting portion 114. In this way, the stator 14 is limited by setting the annular mounting portion 114, so that the stator 14 is coaxially arranged with the rotating shaft 12, thereby facilitating the assembly of the traction machine 1. At the same time, the annular mounting portion 114 can better support the stator 14, thereby improving the stability of the traction machine 1 during operation.

[0066] Please also read Figures 3 to 5 Optionally, the inner wall surface of the annular mounting portion 114 is provided with a plurality of reinforcing ribs 1141, and the plurality of reinforcing ribs 1141 are arranged at intervals along the circumference of the rotating shaft 12. Such an arrangement can improve the strength of the annular mounting portion 114 and prevent the annular mounting portion 114 from being deformed by the stator 14.

[0067] Specifically, the two surfaces of the reinforcing rib 1141 are respectively connected to the inner wall surface of the annular mounting portion 114 and the surface of the base 11 facing the stator 14, so that when the annular mounting portion 114 is subjected to its own radial pressure, it can be transmitted to the surface of the base 11 facing the stator 14 through the reinforcing rib 1141.

[0068] It should be noted that after the stator 14 is sleeved on the annular mounting portion 114, the stator 14 can be spaced apart from the surface of the base 11 facing the stator 14, or the stator 14 can abut against the surface of the base 11 facing the stator 14, which is not specifically limited here. The stator 14 can be partially sleeved on the annular mounting portion 114, or the stator 14 can be completely sleeved on the annular mounting portion 114, which is not specifically limited here.

[0069] Please also read Figure 4 as well as Figure 6 In some embodiments of the present application, the outer peripheral wall of the machine base 11 is provided with an avoidance hole 115, and the avoidance hole 115 is used for the steel rope to extend into the machine base 11 and cooperate with the traction wheel 15; the traction wheel 15 is provided with a plurality of first through holes 151 penetrating along the axial direction of the rotating shaft 12, and the plurality of first through holes 151 are arranged at intervals along the circumference of the traction wheel 15. In this way, the traction wheel 15 can be lightened, thereby reducing the weight of the traction machine 1. At the same time, air can flow to the avoidance hole 115 through the plurality of first through holes 151, thereby facilitating air circulation in the machine base 11, and further facilitating air cooling of the traction wheel 15.

[0070] It should be noted that the avoidance hole 115 can be formed by two holes, and the steel rope passes through one of the holes and is wrapped around the outer peripheral wall of the traction wheel 15 before passing through the other hole. The avoidance hole 115 can also be formed by one hole, and the steel rope passes through the hole and is wrapped around the outer peripheral wall of the traction wheel 15 before passing through the hole. They are not listed here one by one.

[0071] See also Figure 6 Optionally, the traction sheave 15 is provided with at least one reinforcing rib 152 between two adjacent avoidance holes 115. With such a configuration, the strength of the traction sheave 15 can be enhanced, so that the traction sheave 15 can bear a greater weight. It should be noted that the two surfaces of the reinforcing rib 152 are respectively in contact with the axial surface of the traction sheave 15 and the inner wall surface of the traction sheave 15. It can be understood that the axial surface of the traction sheave 15 is concavely provided with a weight-reducing groove, and the inner wall surface of the traction sheave 15 is the groove wall of the weight-reducing groove. The weight-reducing groove can effectively reduce the weight of the traction sheave 15. Preferably, both surfaces of the traction sheave 15 in the axial direction are recessed with weight-reducing grooves. When the traction sheave 15 is provided with one weight-reducing groove, the depth of the weight-reducing groove is equal to the sum of the depths of the two weight-reducing grooves when the traction sheave 15 is provided with two weight-reducing grooves. At this time, the traction sheave 15 is provided with two weight-reducing grooves to shorten the distance from the two ends of the traction sheave 15 in the circumferential direction of the rotating shaft 12 to the bottom of the weight-reducing groove, thereby reducing the bending moment of the steel rope on the two ends of the traction sheave 15 in the axial direction of the rotating shaft 12.

[0072] Please also refer to Figures 2 to 4 The extension part 132 is provided with a heat dissipation hole 1321, and the surface of the base 11 facing the extension part 132 is provided with a second through hole 116. In this way, the heat dissipation hole 1321 is provided on the extension part 132, and the heat dissipation hole 1321, the second through hole 116 and the avoidance hole 115 are connected, so that the heat on the rotor 13 can be taken to the outside of the base 11 by the air through the heat dissipation hole 1321, the second through hole 116 and the avoidance hole 115, so that the rotor 13 can be better cooled.

[0073] See also Figure 3 In some embodiments of the present application, the traction machine 1 further includes a protective cover 18, and the protective cover 18 is mounted on the machine base 11. The protective cover 18 and the machine base 11 are jointly arranged to form a protective cavity 19, and the rotor 13 is located in the protective cavity 19. In this way, by arranging the protective cover 18 to wrap the rotor 13, the external environment can be prevented from affecting the rotor 13, thereby protecting the rotor 13. There are many kinds of materials for making the protective cover 18. The protective cover 18 can be made of metal materials, or it can be made of harder plastic, which is not specifically limited here. The protective cover 18 can be installed on the machine base 11 by screw connection, or it can be installed on the machine base 11 by snap-fitting, which is not specifically limited here.

[0074] When the brake 16 and the rotor 13 are located on the same side of the base 11, the brake 16 can be located inside the protective cavity 19, or outside the protective cavity 19, which is not specifically limited here. It should be noted that when the brake 16 is located outside the protective cavity 19, the protective cover 18 needs to be provided with a hole for the shaft 12 to extend, so as to facilitate the connection between the brake 16 and the shaft 12.

[0075] Please also read Figure 3 as well as Figure 5 In some embodiments of the present application, the inner surface of the base 11 is further provided with a first limiting protrusion 117, and the first limiting protrusion 117 abuts against the surface of at least one bearing 17 facing away from the traction sheave 15. In this way, the first limiting protrusion 117 can limit the direction of the bearing 17 facing away from the traction sheave 15, so as to prevent the bearing 17 from moving away from the traction sheave 15. It should be noted that the first limiting protrusion 117 can be formed by one protrusion, in which case the first limiting protrusion 117 abuts against the surface of one bearing 17 facing away from the traction sheave 15, or the first limiting protrusion 117 can be formed by two protrusions spaced apart along the axial direction of the rotating shaft 12, the two protrusions are respectively located on both sides of the traction sheave 15, in which case the two protrusions abut against the surfaces of two bearings 17 facing away from the traction sheave 15, which are not listed here one by one. The first limiting protrusion 117 may be arranged in a ring shape, or may be formed by a plurality of protrusions arranged at intervals along the circumference of the rotating shaft 12 , which is not specifically limited here.

[0076] Please also read Figure 3 as well as Figure 7 In some embodiments of the present application, the outer peripheral wall of the rotating shaft 12 is provided with a second limiting protrusion 121, and the second limiting protrusion 121 is in contact with at least one surface of a bearing 17 close to the traction wheel 15. It can be understood that the second limiting protrusion 121 is located between the two bearings 17 at the end. In this way, the second limiting protrusion 121 can limit the direction of the bearing 17 close to the traction wheel 15, and the bearing 17 can be prevented from moving in the direction close to the traction wheel 15. It should be noted that the second limiting protrusion 121 can be formed by one protrusion, the traction wheel 15 is sleeved on the second limiting protrusion 121, and the second limiting protrusion 121 and the two bearings 17 adjacent to the traction wheel 15 are abutted against the surface of the traction wheel 15; the second limiting protrusion 121 can also be formed by one, the second limiting protrusion 121 is located between the traction wheel 15 and a bearing 17, and the two ends of the second limiting protrusion 121 in the axial direction of the rotating shaft 12 are respectively abutted against the two opposite surfaces of the traction wheel 15 and the bearing 17; the second limiting protrusion 121 can also be formed by two protrusions, the traction wheel 15 is located between the two protrusions, and the two protrusions are respectively abutted against the surfaces of the two bearings 17 close to the traction wheel 15, which are not listed one by one here.

[0077] Preferably, the second limiting protrusion 121 is located between the traction wheel 15 and a bearing 17, and the two ends of the second limiting protrusion 121 in the axial direction of the rotating shaft 12 are respectively abutted against the two opposite surfaces of the traction wheel 15 and the bearing 17, so that the second limiting protrusion 121 can limit the position of the bearing 17 in the direction close to the traction wheel 15, and at the same time, the second limiting protrusion 121 can also limit the position of the traction wheel 15 in the direction close to the bearing 17, thereby optimizing the structure of the rotating shaft 12.

[0078] The second limiting convex portion 121 may also be formed by two convex portions spaced apart along the axial direction of the rotating shaft 12, and the two convex portions are respectively located on both sides of the traction wheel 15. In this case, the two convex portions respectively abut against the surfaces of the two bearings 17 close to the traction wheel 15, which are not listed here one by one. The second limiting convex portion 121 may be arranged in an annular shape, and the second limiting convex portion 121 may also be formed by a plurality of convex portions spaced apart along the circumferential direction of the rotating shaft 12, which are not specifically limited here.

[0079] Please also read Figure 3 as well as Figure 7 In some embodiments of the present application, the outer peripheral wall of the rotating shaft 12 is provided with a third limiting protrusion 122, and the third limiting protrusion 122 abuts against the surface of the connecting portion 131 close to the traction wheel 15. In this way, the third limiting protrusion 122 can limit the position of the rotor 13 in the direction close to the traction wheel 15, and the rotating shaft 12 can be prevented from moving in the direction close to the traction wheel 15. The third limiting protrusion 122 can be arranged in an annular shape, or the third limiting protrusion 122 can be formed by a plurality of protrusions arranged at intervals along the circumference of the rotating shaft 12, which is not specifically limited here.

[0080] In the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0081] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0082] In the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0083] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0084] The above contents are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A traction machine, characterized in that: include: Machine base; A rotating shaft, mounted on the machine base through at least two bearings and at least partially extending out of the machine base; The rotor comprises a connecting portion drivingly connected to the portion of the rotating shaft extending out of the base, an extension portion extending from the outer edge of the connecting portion to all sides, and a yoke portion extending from the outer edge of the extension portion in a direction parallel to the axial direction of the rotating shaft and close to the bearing; A stator is mounted on a side of the base facing the extension portion and is located on an inner side of the yoke portion; a traction wheel, drivingly connected to the rotating shaft and located between two adjacent bearings; and The brake is drivingly connected to one end of the rotating shaft in the axial direction.

2. The traction machine according to claim 1, characterized in that: The brake is located on a side of the base facing away from the stator.

3. The traction machine according to claim 2, characterized in that: The base comprises: A support frame having a receiving cavity; a brake disc end cover, having a first mounting hole and mounted on one end of the support frame in the axial direction of the rotating shaft; and The core seat has a second mounting hole and is mounted on the other end of the support frame in the axial direction of the rotating shaft; Wherein, the brake is installed on the surface of the brake disc facing away from the accommodating cavity, the stator core is installed on the surface of the core seat facing away from the accommodating cavity, the traction wheel is located in the accommodating cavity, and the first mounting hole and the second mounting hole are both installed with the bearing.

4. The traction machine according to claim 3, characterized in that: One of the core seat and the brake disc end cover is integrally formed with the support frame.

5. The traction machine according to any one of claims 1 to 4, characterized in that: The machine base is provided with an annular mounting portion, the stator is sleeved on the outer peripheral wall of the annular mounting portion, and the rotating shaft is at least partially located on the inner side of the annular mounting portion.

6. The traction machine according to claim 5, characterized in that: The inner wall surface of the annular mounting portion is provided with a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged at intervals along the circumference of the rotating shaft.

7. The traction machine according to any one of claims 1 to 4, characterized in that: The outer peripheral wall of the machine base is provided with an avoidance hole, and the avoidance hole is used for the steel rope to extend into the machine base and cooperate with the traction wheel; The traction wheel is provided with a plurality of first through holes along the axial direction of the rotating shaft, and the plurality of first through holes are arranged at intervals along the circumference of the traction wheel.

8. The traction machine according to claim 7, characterized in that: The traction wheel is provided with at least one reinforcing rib between two adjacent avoidance holes.

9. The traction machine according to claim 7, characterized in that: The extension portion is provided with a heat dissipation hole, and the surface of the base facing the extension portion is provided with a second through hole.

10. The traction machine according to any one of claims 1 to 4, characterized in that: Also includes: A protective cover is installed on the machine base. The protective cover and the machine base are jointly arranged to form a protective cavity. The rotor is located in the protective cavity.

11. The traction machine according to any one of claims 1 to 4, characterized in that: A first limiting protrusion is also convexly provided on the inner surface of the base, and the first limiting protrusion abuts against a surface of at least one of the bearings facing away from the traction wheel.

12. The traction machine according to any one of claims 1 to 4, characterized in that: A second limiting protrusion is convexly disposed on the outer peripheral wall of the rotating shaft, and the second limiting protrusion is in contact with at least one surface of the bearing close to the traction wheel.

13. The traction machine according to any one of claims 1 to 4, characterized in that: A third limiting protrusion is convexly disposed on the outer peripheral wall of the rotating shaft, and the third limiting protrusion abuts against a surface of the connecting portion close to the traction wheel.

14. An elevator, characterized in that: include: Car; Steel rope; as well as The traction machine according to any one of claims 1 to 13, wherein the traction wheel is transmission-connected to the car via the steel rope to drive the car to move upward and downward.

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