Traction device and elevator system

Abstract

The present invention relates to the technical field of elevator equipment, and in particular to a traction device and an elevator system, wherein the traction device includes a machine base, a traction wheel and a driving assembly. The machine base includes a first seat body and a second seat body connected along a first direction, the first seat body defines a first installation cavity, and the second seat body defines a second installation cavity; the traction wheel is installed in the first installation cavity and is used to retract and release the wire rope by winding; the driving assembly includes a stator component and a rotor, the rotor is rotatably arranged in the second installation cavity and is connected to the traction wheel by transmission, the stator component includes a stator seat connected to the second seat body and a winding arranged on the stator seat and located in the second installation cavity, the stator seat defines a heat dissipation cavity, and the heat dissipation cavity is open on one side away from the traction wheel along the first direction; the second seat body is provided with a first heat dissipation rib opposite to the winding. The traction device of the present invention can alleviate the problem of heat dissipation difficulties when a high-speed traction device and a heavy-load traction device use a drive assembly with an outer rotor structure.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator equipment, and in particular to a traction device and an elevator system. Background Art

[0002] The traction device is a component of the elevator system. The traction device is arranged in the elevator shaft. The traction wheel is connected to the wire rope to drive the car connected to the wire rope to run. The brake disc of the traction device can be braked to brake the car.

[0003] The power density of the motor with an outer rotor structure is higher, but the heat dissipation is larger when in use. In the prior art, the heat dissipation effect of high-speed traction machines and heavy-load traction devices is poor, resulting in difficulty in heat dissipation when using the motor with an outer rotor structure as a drive device. Summary of the invention

[0004] The purpose of the present invention is to at least solve the problem of heat dissipation difficulties when a high-speed traction machine and a heavy-load traction device use an outer rotor structure motor as a driving device. This purpose is achieved by:

[0005] The first aspect of the present invention proposes a traction device, which includes: a machine base, a traction wheel and a drive assembly. The machine base includes a first seat body and a second seat body connected along a first direction, the first seat body defines a first installation cavity, and the second seat body defines a second installation cavity; the traction wheel is installed in the first installation cavity and is used to retract and release the wire rope by winding; the drive assembly includes a stator component and a rotor, the rotor is rotatably arranged in the second installation cavity and is transmission-connected to the traction wheel, the stator component includes a stator seat connected to the second seat body and a winding arranged on the stator seat and located in the second installation cavity, the stator seat defines a heat dissipation cavity, and the heat dissipation cavity is open on a side away from the traction wheel along the first direction; wherein the second seat body is provided with a first heat dissipation rib, the first heat dissipation rib is located outside the second installation cavity and is arranged opposite to the winding.

[0006] According to the traction device of the present invention, the winding is arranged on the stator seat, and the stator seat defines a heat dissipation cavity. Therefore, the winding can be efficiently cooled by the stator seat and the heat dissipation cavity. The first heat dissipation rib is arranged opposite to the winding, and the heat generated by the winding enters the second installation cavity and is dissipated through the first heat dissipation rib. Therefore, the winding can be further cooled by the first heat dissipation rib arranged opposite to the winding. Moreover, the first heat dissipation rib and the heat dissipation cavity can cool the winding through multiple positions, so that the space of the traction device can be fully utilized, thereby increasing the heat dissipation effect on the stator component. In addition, the rotor can also be cooled by the first heat dissipation rib and the heat dissipation cavity. Through the traction device of the embodiment of the present invention, the heat dissipation effect of the drive component can be increased, thereby alleviating the problem of heat dissipation difficulty of the drive component of the outer rotor structure.

[0007] In addition, the traction device according to the present invention may also have the following additional technical features:

[0008] In some embodiments of the present invention, the traction wheel and the stator component are located on both sides of the rotor in the first direction, the second installation cavity forms an opening on the side away from the traction wheel in the first direction, and the stator seat closes the opening of the second installation cavity.

[0009] In some embodiments of the present invention, the stator seat includes a first mounting portion and a second mounting portion connected to each other, the first mounting portion defines the heat dissipation cavity, the winding is sleeved on the first mounting portion, and the second mounting portion is connected to the base and closes the opening of the second mounting cavity.

[0010] In some embodiments of the present invention, an installation space is defined in the rotor, at least part of the windings and the first installation portion are arranged in the installation space, an installation opening is provided at one end of the installation space away from the traction wheel along the first direction, and at least part of the first installation portion and at least part of the windings are configured to be able to be installed in or removed from the installation space through the installation opening.

[0011] In some embodiments of the present invention, a plurality of second heat dissipation ribs are arranged in the heat dissipation cavity, and the plurality of second heat dissipation ribs are arranged at intervals along the circumference of the rotor on the peripheral wall of the heat dissipation cavity, and the extension direction of each second heat dissipation rib is consistent with the first direction or is arranged at an angle to the first direction.

[0012] In some embodiments of the present invention, a plurality of the first heat dissipation ribs are provided, each of the first heat dissipation ribs extends along the circumferential direction of the rotor, and the plurality of the first heat dissipation ribs are spaced apart along the first direction.

[0013] In some embodiments of the present invention, the base is provided with a heat dissipation hole communicating with the second installation cavity, and the heat dissipation hole penetrates the outer wall of the base along the wall thickness direction of the base.

[0014] In some embodiments of the present invention, the traction device further comprises a brake disc and a rotating shaft. The brake disc is spaced apart from the traction wheel in the first direction, and part of the machine base is disposed between the brake disc and the traction wheel along the first direction to separate the brake disc and the traction wheel; the rotating shaft extends along the first direction and is rotatably disposed on the machine base, and the traction wheel, the rotor, and the brake disc are all in transmission connection with the rotating shaft.

[0015] In some embodiments of the present invention, along the first direction, the brake disc is located on the side of the traction wheel away from the driving assembly, the machine base includes an end cover embedded in the first base body, the end cover is arranged between the brake disc and the traction wheel along the first direction and separates the brake disc and the traction wheel, and the rotating shaft passes through the end cover.

[0016] In some embodiments of the present invention, the traction wheel has a first connection portion connected to the rotating shaft, the end cover includes a fourth connection portion connected to the first seat body and a fifth connection portion connected to the rotating shaft, and at least part of the fifth connection portion is located between the first connection portion and the fourth connection portion along the first direction.

[0017] In some embodiments of the present invention, at least a portion of the first seat is located between the brake disc and the traction sheave in the first direction, and at least a portion of the first seat separates the brake disc and the traction sheave.

[0018] In some embodiments of the present invention, the brake disc is disposed on a side of the first seat body away from the second seat body, the rotating shaft is rotatably disposed on the second seat body and the end cover, and the first seat body and the second seat body are both provided with a base and are connected to each other.

[0019] In some embodiments of the present invention, the second seat body includes a mounting seat and a connecting section. The mounting seat is connected to the first seat body along the first direction; the connecting section has a second connecting portion and a third connecting portion that are oppositely arranged in the radial direction of the traction wheel, the second connecting portion is connected to the mounting seat, the third connecting portion is connected to the rotating shaft, and at least a portion of the third connecting portion is located between the first connecting portion and the second connecting portion in the first direction.

[0020] In some embodiments of the present invention, the third connection portion and the fifth connection portion are symmetrically arranged relative to the traction wheel.

[0021] In some embodiments of the present invention, the traction device further includes a first bearing, the end cover is sleeved on the first bearing, the first bearing is sleeved on the rotating shaft, and the first bearing is provided with an oil seal on a side close to the brake disc.

[0022] In some embodiments of the present invention, the traction device also includes a second bearing, the second bearing is sleeved on the rotating shaft, the machine base is sleeved on the second bearing, the first bearing and the second bearing are located on both sides of the traction wheel in the first direction, and are symmetrically arranged relative to the first traction wheel.

[0023] In some embodiments of the present invention, the first installation cavity forms openings on both sides of the second direction, and the second direction is perpendicular to the first direction.

[0024] The second aspect of the present invention further proposes an elevator system, comprising: the traction device as described in the first aspect above.

[0025] The elevator system according to the present invention comprises the traction device of the first aspect as described above, which has a good heat dissipation effect on the drive assembly of the outer rotor structure, thereby alleviating the problem of heat dissipation difficulty of the drive assembly of the outer rotor structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. Among them:

[0027] Figure 1 is a three-dimensional schematic diagram of a traction device according to an embodiment of the present invention;

[0028] Figure 2 A front view of a traction device according to an embodiment of the present invention;

[0029] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0030] Figure 4 for Figure 3 A cross-sectional view of the middle engine base;

[0031] Figure 5 for Figure 3 A cross-sectional view of the middle end cover;

[0032] Figure 6 for Figure 3 A cross-sectional view of the middle stator seat;

[0033] Figure 7 for Figure 3 A cross-sectional view of the middle rotor;

[0034] Figure 8 It is a three-dimensional schematic diagram of a base according to an embodiment of the present invention.

[0035] The reference numerals in the accompanying drawings represent the following:

[0036] 100. Traction device;

[0037] 1. base; 11. first base body; 111. mounting boss; 112. first mounting cavity; 113. base; 114. main body; 12. second base body; 121. mounting base; 122. connecting section; 1221. second connecting section; 1222. third connecting section; 123. second lifting ring section; 124. second mounting cavity; 125. heat dissipation hole; 13. first heat dissipation rib; 14. connecting frame; 141. boss; 1411. first through hole; 142. crossbeam; 143. arc-shaped connecting section; 144. sixth connecting section; 1441. second through hole; 145. first lifting ring section; 146. vertical rib;

[0038] 2. traction wheel; 21. first connecting part; 22. third expansion sleeve;

[0039] 3. Brake disc; 31. Second expansion sleeve;

[0040] 4. End cover; 41. Fourth connecting portion; 42. Fifth connecting portion; 43. Oil seal; 44. Seventh connecting portion;

[0041] 5. Rotating shaft;

[0042] 6. drive assembly; 61. stator component; 611. stator seat; 6111. heat dissipation cavity; 6112. second heat dissipation rib; 6113. first mounting portion; 6114. second mounting portion; 612. winding; 62. rotor; 621. mounting space; 622. mounting opening; 63. first expansion sleeve;

[0043] 7. First bearing;

[0044] 8. Second bearing;

[0045] 9. Brake caliper. DETAILED DESCRIPTION

[0046] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0047] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0048] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically limited.

[0049] In the description of the present invention, the orientations or positional relationships indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "circumferential", "height direction", "first direction", and "third direction" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0050] In the present invention, 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; 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 the present invention can be understood according to specific circumstances.

[0051] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is rotated, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0052] In the prior art, a steel wire rope is arranged on a traction wheel of a traction device and is connected to a car of an elevator system. The traction device drives the steel wire rope to move through the traction wheel, thereby driving the car to move, so that the elevator system can operate.

[0053] In the prior art, light traction machines usually use motors with outer rotor structures as driving devices. The rotor of light traction machines has a large load-bearing capacity. The frame of the light traction machine defines a first installation space for accommodating the shaft portion of the outer rotor structure and a second installation space for installing the winding. The second installation space is arranged outside the first installation space. The shaft portion of the rotor of the light traction machine is arranged in the first installation space so that the rotor can be installed. A part of the main body connected to the shaft portion is arranged in the second installation space so as to cooperate with the winding so that the winding can drive the rotor to rotate. The other part of the main body is located outside the frame and is directly connected to the traction wheel.

[0054] The frame includes a first wall and a second wall, a first installation space is defined by the first wall, and a second installation space is defined by the second wall. Since the second installation space is arranged outside the first installation space, the second wall is arranged outside the first wall. The first wall and the second wall are connected by a connecting wall, and a cavity is defined between the first wall, the second wall and the connecting wall (if the wall thickness of the connecting wall is too large to fill the gap between the first wall and the second wall, shrinkage and shrinkage holes will occur during the production process. Therefore, the cavity defined between the first wall, the second wall and the connecting wall can avoid shrinkage and shrinkage holes, making the structure reasonable). In order to increase the strength of the machine base, reinforcing ribs are set in the cavity.

[0055] The cavity and reinforcement ribs of the light traction machine can serve as a heat dissipation structure while meeting the structural strength. The rotor of the light traction machine bears a large load, so the radial dimension of the light traction machine is large, the size of the cavity and reinforcement ribs is relatively large, and part of the main body is located outside the frame to enhance the heat dissipation effect. Therefore, the light traction machine can meet the heat dissipation needs of the motor with an outer rotor structure.

[0056] However, high-speed traction machines and heavy-load traction devices do not have the structural conditions of light-duty traction machines. The loads borne by high-speed traction machines and heavy-load traction devices during operation are relatively large, so the rotor cannot be the main part that bears the load. Therefore, the radial size is relatively small, resulting in poor heat dissipation even if a heat dissipation cavity is opened in the motor. As a result, the heat dissipation conditions of high-speed traction machines and heavy-load traction devices are relatively poor, resulting in difficulty in heat dissipation when using an outer rotor structure motor as a drive device. In some cases, in the prior art, high-speed traction machines and heavy-load traction devices that use an outer rotor structure motor as a drive device need to be equipped with a heat dissipation device such as a fan to dissipate heat from the motor.

[0057] The present invention aims to at least solve the problem of heat dissipation difficulties when a high-speed traction machine and a heavy-load traction device use an outer rotor structure motor as a driving device.

[0058] To this end, an embodiment of the present invention provides a traction device 100 having a good heat dissipation effect, which can alleviate the heat dissipation difficulty problem when a high-speed traction device and a heavy-load traction device use a drive assembly 6 with an outer rotor structure.

[0059] The embodiment of the present invention further provides an elevator system including the traction device 100 of the above embodiment.

[0060] The traction device 100 and the elevator system according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

[0061] Combination Figure 1 , Figure 3 , Figure 4 and Figure 8As shown, the traction device 100 according to the embodiment of the present invention includes a machine base 1, a traction wheel 2 and a driving assembly 6. The base 1 includes a first base body 11 and a second base body 12 connected along a first direction, the first base body 11 defines a first installation cavity 112, and the second base body 12 defines a second installation cavity 124; the traction wheel 2 is installed in the first installation cavity 112 and is used to retract and release the wire rope by winding; the driving assembly 6 includes a stator component 61 and a rotor 62, the rotor 62 is rotatably arranged in the second installation cavity 124 and is transmission-connected to the traction wheel 2, the stator component 61 includes a stator seat 611 connected to the second base body 12 and a winding 612 arranged on the stator seat 611 and located in the second installation cavity 124, the stator seat 611 defines a heat dissipation cavity 6111, and the heat dissipation cavity 6111 is open on a side away from the traction wheel 2 along the first direction; wherein the second base body 12 is provided with a first heat dissipation rib 13, the first heat dissipation rib 13 is located outside the second installation cavity 124 and is arranged opposite to the winding 612.

[0062] The first direction is parallel to the rotation axis of the traction wheel 2. As an example, the first direction is Figure 3 As shown in a in the middle.

[0063] The first seat body 11 and the second seat body 12 are connected along a first direction, the traction wheel 2 is installed in a first installation cavity 112 defined by the first seat body 11, and the winding 612 and the rotor 62 in the drive assembly 6 are located in a second installation cavity 124 defined by the second seat body 12, so that the positional relationship between the traction wheel 2, the first seat body 11, the second seat body 12 and the drive assembly 6 is reasonable, so that they can have higher stability when bearing a large load, and thus the traction device 100 of the embodiment of the present invention can adapt to high-speed and heavy-load working conditions.

[0064] During the operation of the drive assembly 6, the current will generate resistance loss when flowing through the winding 612, thereby generating heat, which is one of the main sources of heat generation of the drive assembly 6. Therefore, during the operation of the drive assembly 6, the heat generated by the winding 612 is greater than the heat generated by the rotor 62.

[0065] The winding 612 is arranged on the stator seat 611, and the stator seat 611 defines a heat dissipation cavity 6111, thereby, the winding 612 can be efficiently cooled by the stator seat 611 and the heat dissipation cavity 6111. The first heat dissipation rib 13 is arranged opposite to the winding 612, and the heat generated by the winding 612 enters the second installation cavity 124 and is cooled by the first heat dissipation rib 13, thereby, the winding 612 can be further cooled by the first heat dissipation rib 13 arranged opposite to the winding 612.

[0066] Moreover, the heat dissipation cavity 6111 and the first heat dissipation rib 13 can dissipate heat from the stator component 61 through multiple positions, so as to fully utilize the space of the traction device 100, thereby increasing the heat dissipation effect on the stator component 61. In addition, the rotor 62 can also be dissipated through the first heat dissipation rib 13 and the heat dissipation cavity 6111.

[0067] In the traction device 100 of the embodiment of the present invention, the winding 612 is arranged on the stator seat 611, and the stator seat 611 defines a heat dissipation cavity 6111. Therefore, the stator seat 611 and the heat dissipation cavity 6111 can efficiently dissipate heat from the winding 612. The first heat dissipation rib 13 is arranged opposite to the winding 612. The heat generated by the winding 612 enters the second installation cavity 124 and is dissipated through the first heat dissipation rib 13. Therefore, the first heat dissipation rib 13 arranged opposite to the winding 612 can further dissipate heat from the winding 612. Moreover, the first heat dissipation rib 13 and the heat dissipation cavity 6111 can dissipate heat from the winding 612 through multiple positions, so that the space of the traction device 100 can be fully utilized, thereby increasing the heat dissipation effect on the stator component 61. In addition, the rotor 62 can also be dissipated through the first heat dissipation rib 13 and the heat dissipation cavity 6111. Through the traction device 100 of the embodiment of the present invention, the heat dissipation effect of the drive assembly 6 can be increased, thereby alleviating the problem of heat dissipation difficulty of the drive assembly 6 with an outer rotor structure.

[0068] In addition, the second mounting cavity 124 can position the winding 612 and the rotor 62 , thereby reducing assembly errors.

[0069] Optionally, the first base body 11 and the second base body 12 are integrally formed, so that the base 1 has greater strength. In addition, the first base body 11 and the second base body 12 are integrally formed, and the force distribution is reasonable, so that the probability of damage to the base 1 can be reduced.

[0070] The elevator system of the embodiment of the present invention includes the traction device 100 of the above embodiment, which has a good heat dissipation effect on the drive assembly 6 of the outer rotor structure, thereby alleviating the problem of heat dissipation difficulty of the drive assembly 6 of the outer rotor structure.

[0071] In some specific embodiments, the elevator system further includes a wire rope, a counterweight and a car. The traction device 100, the car, the counterweight and the wire rope are all arranged in the elevator shaft. The car and the counterweight are arranged on both sides of the traction wheel 2 along the radial direction of the traction wheel 2. The wire rope includes a first rope segment, a second rope segment and a third rope segment. The third rope segment is arranged on the traction wheel 2. The first rope segment and the second rope segment both extend along a third direction. The third direction is perpendicular to the first direction. The third direction is an up-down direction. As an example, the third direction is as follows: Figure 3As shown at b in the figure. One end of the first rope segment is connected to the car, the other end of the first rope segment is connected to one end of the third rope segment, one end of the second rope segment is connected to the counterweight, and the other end of the second rope segment is connected to the other end of the third rope segment. The traction sheave 2 determines the output torque according to the weight of the car and the weight of the counterweight, so as to drive the car to run.

[0072] Combination Figure 3 and Figure 4 As shown, in some embodiments, the traction wheel 2 and the stator component 61 are located on both sides of the rotor 62 in the first direction, the second installation cavity 124 forms an opening on the side away from the traction wheel 2 in the first direction, and the stator seat 611 closes the opening of the second installation cavity 124.

[0073] The rotor 62 and the winding 612 are both located in the second installation cavity 124, so the rotor 62 and the winding 612 can be protected by the stator seat 611. The stator seat 611 seals the second installation cavity 124, thereby increasing the airtightness of the second installation cavity 124, thereby reducing the risk of water entering the second installation cavity 124.

[0074] Combination Figure 3 , Figure 6 and Figure 7 As shown, in some embodiments, the stator seat 611 includes a first mounting portion 6113 and a second mounting portion 6114 which are connected to each other, the first mounting portion 6113 defines a heat dissipation cavity 6111, the winding 612 is sleeved on the first mounting portion 6113, and the second mounting portion 6114 is connected to the base 1 and closes the opening of the second mounting cavity 124.

[0075] When installing the winding 612 and the stator seat 611, the winding 612 is sleeved on the first installation portion 6113, so that the winding 612 and the stator seat 611 can be installed synchronously, so as to simplify the installation steps of the winding 612 and the stator seat 611 and reduce the difficulty of installing the winding 612 and the stator seat 611.

[0076] In addition, the winding 612 and the heat dissipation cavity 6111 are both arranged on the first mounting portion 6113, so that the heat dissipation effect of the heat dissipation cavity 6111 on the winding 612 can be improved, so that the heat generated by the winding 612 can be discharged in time through the heat dissipation cavity 6111. The winding 612 and the heat dissipation cavity 6111 are both arranged on the first mounting portion 6113, and the first heat dissipation rib 13 is arranged opposite to the winding 612. Through the position setting between the winding 612, the heat dissipation cavity 6111 and the first heat dissipation rib 13, the heat dissipation effect of the drive component 6 can be increased, thereby alleviating the problem of heat dissipation difficulty of the drive component 6 with an outer rotor structure.

[0077] like Figure 3 As shown, in some optional embodiments, the rotor 62 is connected to the rotating shaft 5 via a first expansion sleeve 63 .

[0078] The rotor 62 can be connected to the rotating shaft 5 by providing the first expansion sleeve 63 , thereby avoiding the need to provide a keyway on the rotating shaft 5 , thereby improving the strength of the rotating shaft 5 .

[0079] In addition, by providing the first expansion sleeve 63 , the rotor 62 and the rotating shaft 5 can be quickly assembled and disassembled, thereby facilitating the installation and disassembly of the rotor 62 and the rotating shaft 5 .

[0080] In the prior art, the stator component and the rotor of the drive assembly need to be assembled together for installation. After the stator component and the rotor are assembled together, they are heavy, which makes it difficult to assemble the drive assembly in the prior art, and also makes it difficult to disassemble the drive assembly in the prior art.

[0081] Combination Figure 3 and Figure 7 As shown, in some embodiments, an installation space 621 is defined in the rotor 62, at least a portion of the winding 612 and the first installation portion 6113 are arranged in the installation space 621, and an installation opening 622 is provided at one end of the installation space 621 away from the traction wheel 2 along the first direction, and at least a portion of the first installation portion 6113 and at least a portion of the winding 612 are configured to be able to be arranged in or detached from the installation space 621 through the installation opening 622.

[0082] At least part of the stator seat 611 and at least part of the winding 612 can enter or leave the installation space 621 through the installation opening 622. When assembling the drive assembly 6, the rotor 62 can be assembled first, and then the stator component 61 can be transferred. In other words, the drive assembly 6 can be assembled in parts, thereby reducing the difficulty of assembling the drive assembly 6. When disassembling the drive assembly 6, the stator component 61 can be disassembled first, and then the rotor 62 can be disassembled. In other words, the drive assembly 6 can be disassembled in parts, thereby reducing the difficulty of disassembling the drive assembly 6.

[0083] Therefore, by setting the installation space 621 and the installation opening 622, at least part of the stator seat 611 and at least part of the winding 612 can be set in the installation space 621 through the installation opening 622 or can be detached from the installation space through the installation opening 622, so as to facilitate the installation and disassembly of the drive assembly 6.

[0084] Combination Figure 3 and Figure 6 As shown, in some embodiments, a plurality of second heat dissipation ribs 6112 are arranged in the heat dissipation cavity 6111, and the plurality of second heat dissipation ribs 6112 are arranged on the peripheral wall of the heat dissipation cavity 6111 at intervals along the circumference of the rotor 62, and the extension direction of each second heat dissipation rib 6112 is consistent with the first direction or is arranged at an angle to the first direction.

[0085] The heat dissipation area is increased by the second heat dissipation rib 6112, thereby further increasing the heat dissipation effect on the drive assembly 6. By making the extension direction of the second heat dissipation rib 6112 consistent with the third direction or arranged at an angle to the third direction, the second heat dissipation rib 6112 can more efficiently discharge heat through the heat dissipation cavity 6111 along the third direction away from the opening at one end of the traction sheave 2.

[0086] like Figure 8 As shown, in some embodiments, a plurality of first heat dissipation ribs 13 are provided, each of which extends along the circumference of the rotor 62 , and the plurality of first heat dissipation ribs 13 are spaced apart along the first direction.

[0087] The rotor 62 is cooled by the plurality of first cooling ribs 13 , thereby further improving the cooling effect.

[0088] like Figure 3 As shown, in some embodiments, the base 1 is provided with a heat dissipation hole 125 connected to the second installation cavity 124, and the heat dissipation hole 125 penetrates the outer wall of the base 1 along the wall thickness direction of the base 1. In other words, the heat dissipation hole 125 penetrates the outer wall of the base 1 along the wall thickness direction of the base 1 and is connected to the second installation cavity 124.

[0089] The heat dissipation hole 125 is connected to the second installation cavity 124, and the heat in the second installation cavity 124 can be discharged in time through the heat dissipation hole 125. Moreover, when the rotor 62 is working, it will disturb the airflow in the second installation cavity 124, thereby increasing the convective heat exchange effect between the second installation cavity 124 and the external environment, and further increasing the heat dissipation effect.

[0090] In some embodiments, the traction device 100 further includes a brake disc 3 and a rotating shaft 5. The brake disc 3 is spaced apart from the traction wheel 2 in the first direction, and a portion of the machine base 1 is disposed between the brake disc 3 and the traction wheel 2 along the first direction and separates the brake disc 3 and the traction wheel 2. The rotating shaft 5 extends along the first direction and is rotatably disposed on the machine base 1, and the traction wheel 2, the rotor 62 and the brake disc 3 are all in transmission connection with the rotating shaft 5.

[0091] The brake disc 3 and the traction sheave 2 are both connected to the rotating shaft 5. When the brake disc 3 is braked, a braking torque is generated, and the braking torque acts on the traction sheave 2 through the rotating shaft 5 so that the traction sheave 2 can be braked. The brake disc 3 is spaced apart from the traction sheave 2 in the first direction, and the brake disc 3 and the traction sheave 2 are separated by a part of the machine base 1, so that the grease on the wire rope provided on the traction sheave 2 can be blocked after splashing out, thereby reducing the probability of the grease splashing onto the brake disc 3, thereby reducing the probability of the braking torque of the brake disc 3 decreasing, and reducing the probability of the braking effect of the brake disc 3 decreasing.

[0092] like Figure 3As shown, in some optional embodiments, the brake disc 3 is connected to the rotating shaft 5 via a second expansion sleeve 31 .

[0093] The second expansion sleeve 31 is provided so that the brake disc 3 can be connected to the rotating shaft 5 , thereby avoiding the need to provide a keyway on the rotating shaft 5 , thereby improving the strength of the rotating shaft 5 .

[0094] In addition, by providing the second expansion sleeve 31 , the brake disc 3 and the rotating shaft 5 can be quickly assembled and disassembled, thereby facilitating the installation and disassembly of the brake disc 3 and the rotating shaft 5 .

[0095] like Figure 3 As shown, in some embodiments, along the first direction, the brake disc 3 is located on the side of the traction wheel 2 away from the driving assembly 6, the machine base 1 includes an end cover 4 embedded in the first base body 11, the end cover 4 is arranged between the brake disc 3 and the traction wheel 2 along the first direction and separates the brake disc 3 and the traction wheel 2, and the rotating shaft 5 passes through the end cover 4.

[0096] The brake disc 3 and the traction wheel 2 are separated by the end cover 4, so that the grease on the wire rope of the traction wheel 2 can be blocked by the end cover 4 after splashing out, thereby reducing the probability of the grease splashing onto the brake disc 3, thereby reducing the probability of the braking torque of the brake disc 3 decreasing, and reducing the probability of the braking effect of the brake disc 3 decreasing.

[0097] like Figure 3 As shown, in some optional embodiments, the dimension of the end cover 4 along the radial direction of the traction sheave 2 is greater than or equal to the dimension of the traction sheave 2 in the radial direction. In other words, the end cover 4 can cover all parts of the traction sheave 2. Thus, the probability of grease splashing onto the brake disc 3 can be reduced.

[0098] In some other optional embodiments, the dimension of the end cover 4 along the radial direction of the traction sheave 2 is smaller than the dimension of the traction sheave 2 in the radial direction, that is, the end cover 4 can cover a part of the traction sheave 2. Thus, the probability of grease splashing onto the brake disc 3 can be reduced.

[0099] Combination Figure 3 and Figure 4 As shown, in some embodiments, the traction wheel 2 has a first connection portion 21 connected to the rotating shaft 5, the end cover 4 includes a fourth connection portion 41 connected to the first seat body 11 and a fifth connection portion 42 connected to the rotating shaft 5, and at least part of the fifth connection portion 42 is located between the first connection portion 21 and the fourth connection portion 41 along the first direction.

[0100] At least part of the fifth connection portion 42 is located between the first connection portion 21 and the fourth connection portion 41 along the first direction to reduce the distance between the fifth connection portion 42 and the first connection portion 21 in the first direction, thereby reducing the deflection of the rotating shaft 5 .

[0101] like Figure 5 As shown, the end cover 4 further includes a seventh connection portion 44, one end of which is connected to the fourth connection portion 41, and the other end of which is connected to the fifth connection portion 42. In the first direction, one end of the seventh connection portion 44 connected to the fifth connection portion 42 is located at a side of the end of the seventh connection portion 44 connected to the fourth connection portion 41 close to the traction wheel 2, so that the seventh connection portion 44 is subjected to reasonable force.

[0102] For example, the main body shape of the seventh connection portion 44 is conical, so that the seventh connection portion 44 is subjected to reasonable force.

[0103] Furthermore, reinforcing ribs are provided on both sides of the seventh connecting portion 44 in the first direction, so as to increase the structural strength of the seventh connecting portion 44 .

[0104] like Figure 3 As shown, further, the first connecting portion 21 is connected to the rotating shaft 5 through a third expansion sleeve 22 .

[0105] By providing the third expansion sleeve 22 , the first connection portion 21 can be connected to the rotating shaft 5 , thereby avoiding the need to provide a keyway on the rotating shaft 5 , thereby improving the strength of the rotating shaft 5 .

[0106] In addition, by providing the third expansion sleeve 22 , the traction wheel 2 and the rotating shaft 5 can be quickly assembled and disassembled, thereby facilitating the installation and disassembly of the traction wheel 2 and the rotating shaft 5 .

[0107] Combination Figure 3 and Figure 4 As shown, in some embodiments, the second seat body 12 includes a mounting seat 121 and a connecting section 122. The mounting seat 121 is connected to the first seat body 11 along the first direction. The connecting section 122 has a second connecting portion 1221 and a third connecting portion 1222 that are oppositely arranged in the radial direction of the traction wheel 2, the second connecting portion 1221 is connected to the mounting seat 121, the third connecting portion 1222 is connected to the rotating shaft 5, and at least part of the third connecting portion 1222 is located between the first connecting portion 21 and the second connecting portion 1221 in the first direction.

[0108] By making at least a portion of the third connection portion 1222 located between the first connection portion 21 and the second connection portion 1221 in the first direction, the distance between the third connection portion 1222 and the first connection portion 21 in the first direction can be reduced, and the third connection portion 1222 can be made as close to the first connection portion 21 as possible, thereby reducing the deflection of the rotating shaft 5.

[0109] like Figure 3 As shown, in some embodiments, the third connection portion 1222 and the fifth connection portion 42 are symmetrically arranged relative to the traction wheel 2.

[0110] By symmetrically arranging the third connection portion 1222 and the fifth connection portion 42, the third connection portion 1222 and the fifth connection portion 42 can bear the load more evenly, thereby increasing the stability of the traction device 100 of this embodiment during operation.

[0111] Combination Figure 1 , Figure 3 , Figure 4 and Figure 8 As shown, in some embodiments, at least a portion of the first seat body 11 is located between the brake disc 3 and the traction sheave 2 in the first direction, and at least a portion of the first seat body 11 separates the brake disc 3 and the traction sheave 2 .

[0112] The first seat body 11 can further block the grease, thereby further reducing the probability of grease splashing onto the brake disc 3, and further reducing the probability of the braking torque of the brake disc 3 decreasing, and further reducing the probability of the braking effect of the brake disc 3 decreasing, so that the elevator system of the embodiment of the present invention can further reduce the probability of safety risks.

[0113] Combination Figure 1 , Figure 3 , Figure 4 and Figure 8 In some embodiments, the brake disc 3 is disposed on the side of the first seat body 11 away from the second seat body 12, the rotating shaft 5 is rotatably disposed on the second seat body 12 and the end cover 4, and the first seat body 11 and the second seat body 12 are both provided with a base 113 and are connected to each other. In other words, the first seat body 11 and the second seat body 12 are both provided with a base 113, and the first seat body 11 and the second seat body 12 are connected to each other.

[0114] The base 113 is used to contact the external environment to more stably support the first seat 11 and the second seat 12. By providing the first seat 11 and the second seat 12 with the base 113, the stability of the first seat 11 and the second seat 12 can be improved, thereby preventing the traction device 100 from tipping over during operation.

[0115] like Figure 3 As shown, in some embodiments, the traction device 100 further includes a first bearing 7 , the end cover 4 is sleeved on the first bearing 7 , the first bearing 7 is sleeved on the rotating shaft 5 , and an oil seal 43 is provided on the side of the first bearing 7 close to the brake disc 3 .

[0116] The oil seal 43 can be provided to separate the first bearing 7 and the brake disc 3, thereby reducing the probability of the lubricant in the first bearing 7 contacting the brake disc 3. The lubricant can be lubricating oil, lubricating grease, and the like.

[0117] Furthermore, the first bearing 7 can be sealed by the oil seal 43 , thereby reducing the probability that the lubricant in the first bearing 7 comes into contact with other components.

[0118] like Figure 3 As shown, further, an oil seal 43 is provided on the side of the first bearing 7 facing away from the brake disc 3 .

[0119] An oil seal 43 is provided on the side of the first bearing 7 facing away from the brake disc 3 , so as to further seal the first bearing 7 , thereby further reducing the probability of the lubricating material in the first bearing 7 contacting other components.

[0120] like Figure 3 As shown, in some embodiments, the traction device 100 also includes a second bearing 8, the second bearing 8 is sleeved on the rotating shaft 5, the base 1 is sleeved on the second bearing 8, the first bearing 7 and the second bearing 8 are located on both sides of the traction wheel 2 in the first direction, and are symmetrically arranged relative to the first traction wheel 2.

[0121] In the traction device 100 of the embodiment of the present invention, the traction wheel 2 and the brake disc 3 are separately arranged, so the first bearing 7 and the second bearing 8 can be as close to the traction wheel 2 as possible, so that the interval between the first bearing 7 and the second bearing 8 is reduced. Since the traction wheel 2 is connected to the car, the load-bearing capacity of the traction wheel 2 is large, and the interval between the first bearing 7 and the second bearing 8 is reduced, which can reduce the distance between the first bearing 7 and the second bearing 8 relative to the traction wheel 2, thereby reducing the deflection of the rotating shaft 5, that is, the deformation of the rotating shaft 5 can be reduced.

[0122] The first bearing 7 and the second bearing 8 are symmetrically arranged relative to the first traction wheel 2, so that the first bearing 7 and the second bearing 8 can bear the load more evenly, thereby increasing the stability of the traction device 100 of this embodiment during operation.

[0123] like Figure 3 As shown, further, both ends of the second bearing 8 in the first direction are provided with oil seals 43, and the second bearing 8 can be sealed by the oil seals 43, thereby reducing the probability of the lubricating material in the first bearing 7 contacting other components.

[0124] like Figure 8 As shown, in some embodiments, the first installation cavity 112 forms openings on both sides in the second direction, and the second direction is perpendicular to the first direction.

[0125] The second direction refers to a horizontal direction perpendicular to the first direction when the traction device 100 is normally placed. Figure 8 As shown in c in the middle.

[0126] The wrap angle refers to the angle formed by the arc length of the wire rope in contact with the traction wheel 2 relative to the center of the circle.

[0127] When the wrap angle is less than 180°, the first installation cavity 112 forms openings on both sides in the second direction, which can avoid obstruction to the wire rope. Therefore, the traction device 100 of this embodiment can adapt to various wrap angle usage environments by forming openings on both sides of the first installation cavity 112 in the second direction.

[0128] Combination Figure 1 , Figure 2 and Figure 8 As shown, in some embodiments, the traction device 100 further includes a brake caliper 9, and the first seat body 11 is provided with a mounting boss 111. The brake caliper 9 cooperates with the brake disc 3 and can brake the brake disc 3. The brake caliper 9 is provided on the mounting boss 111. The provision of the mounting boss 111 makes it easy to install the brake caliper 9.

[0129] Furthermore, a plurality of brake calipers 9 are provided, and a plurality of mounting bosses 111 are provided. The plurality of brake calipers 9 and the plurality of mounting bosses 111 are arranged in one-to-one correspondence, and each brake caliper 9 is arranged on a corresponding mounting boss 111 .

[0130] By providing a plurality of brake calipers 9 , the braking effect on the brake disc 3 can be increased.

[0131] Combination Figure 3 and Figure 4 As shown, in some embodiments, the first seat body 11 includes a main body 114 and a connecting frame 14, one end of the connecting frame 14 along the first direction is connected to the main body 114, and the other end of the connecting frame 14 along the first direction is connected to the second seat body 12, and a first installation cavity 112 is defined between the connecting frame 14 and the main body 114, and at least a portion of the connecting frame 14 is covered on the traction wheel 2 to protect the traction wheel 2.

[0132] Combination Figure 3 and Figure 8As shown, further, the connecting frame 14 includes a boss 141, two cross beams 142 and two arc-shaped connecting sections 143. One end of the boss 141 in the first direction is connected to the first seat body 11, and the other end of the boss 141 in the first direction is connected to the second seat body 12. The two cross beams are located on both sides of the boss 141 in the second direction. The two cross beams 142 extend along the first direction, and one end of each cross beam 142 in the first direction is connected to the first seat body 11, and the other end of each cross beam 142 in the first direction is connected to the second seat body 12. Each cross beam 142 is located below the boss 141. The two arc-shaped connecting segments 143 are located at both ends of the boss 141 in the second direction, one end of each arc-shaped connecting segment 143 in the first direction is connected to the first seat body 11, and the other end of each arc-shaped connecting segment 143 in the first direction is connected to the second seat body 12, one end of each arc-shaped connecting segment 143 in the third direction is connected to the boss 141, and the other end of each arc-shaped connecting segment 143 in the third direction is connected to the corresponding cross beam 142.

[0133] The cross beam 142 and the boss 141 increase the connection strength between the first seat body 11 and the second seat body 12 , and the cross beam 142 , the boss 141 and the arc-shaped connecting section 143 are covered on the traction wheel 2 to protect the traction wheel 2 .

[0134] Specifically, a reinforcing rib is provided between one end of each beam 142 in the first direction and the first seat body 11 , and a reinforcing rib is provided between the other end of each beam 142 in the first direction and the second seat body 12 , thereby further increasing the connection strength between the first seat body 11 and the second seat body 12 .

[0135] like Figure 8 As shown, further, the connecting frame 14 also includes two first hanging ring portions 145, each first hanging ring portion 145 is used for hanging, and the two first hanging ring portions 145 are arranged one by one on the two arc-shaped connecting sections 143, each first hanging ring portion 145 is connected to the corresponding cross beam 142, and each first hanging ring portion 145 is connected to the boss 141, thereby increasing the connection strength between the boss 141, the cross beam 142 and the arc-shaped connecting section 143.

[0136] like Figure 8 As shown, further, the second seat body 12 includes two second lifting ring parts 123, each of the second lifting ring parts 123 is suitable for being hoisted, and the two second lifting ring parts 123 correspond one by one to the two first lifting ring parts 145 in the first direction and are arranged at intervals so that the traction device 100 can maintain balance during the hoisting process.

[0137] Combination Figure 3 and Figure 8As shown, in some further embodiments, the boss 141 is located above the traction wheel 2, and the boss 141 is provided with a first through hole 1411, and the first through hole 1411 is arranged opposite to the traction wheel 2 in the third direction. The first through hole 1411 is provided so that the wire rope can be arranged on the traction wheel 2 through the first through hole 1411.

[0138] Combination Figure 3 and Figure 8 As shown, in some specific embodiments, the connecting frame 14 includes a sixth connecting portion 144, the sixth connecting portion 144 is arranged opposite to the boss 141 in the third direction, one end of the sixth connecting portion 144 in the first direction is connected to the first seat body 11, and the other end of the sixth connecting portion 144 in the first direction is connected to the second seat body 12, so as to increase the connection strength between the first seat body 11 and the second seat body 12. The sixth connecting portion 144 is provided with a second through hole 1441, and the second through hole 1441 is arranged opposite to the traction wheel 2 in the third direction. The wire rope can pass through the connecting frame 14 through the second through hole 1441 and be connected to the car, so that the structure of the base 1 of the embodiment of the present invention is reasonable.

[0139] like Figure 8 As shown, in some specific embodiments, the connecting frame 14 also includes a vertical rib 146, one end of the vertical rib 146 along the first direction is connected to the first seat body 11, the other end of the vertical rib 146 along the first direction is connected to the second seat body 12, the vertical rib 146 is located above the sixth connecting portion 144, and the lower end of the vertical rib 146 is connected to the sixth connecting portion 144, and the structural strength of the sixth connecting portion 144 is strengthened by the vertical rib 146.

[0140] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A traction device, characterized in that: include: A machine base, the machine base comprising a first base body and a second base body connected along a first direction, the first base body defines a first installation cavity, and the second base body defines a second installation cavity; A traction wheel, installed in the first installation cavity and used for retracting and releasing the wire rope by winding; A drive assembly, the drive assembly comprising a stator component and a rotor, the rotor being rotatably disposed in the second mounting cavity and drivingly connected to the traction wheel, the stator component comprising a stator seat connected to the second seat body and a winding disposed on the stator seat and located in the second mounting cavity, the stator seat defining a heat dissipation cavity, the heat dissipation cavity opening on a side away from the traction wheel along the first direction; Wherein, the second seat body is provided with a first heat dissipation rib, and the first heat dissipation rib is located outside the second installation cavity and arranged opposite to the winding; The first seat body and the second seat body are integrally formed parts; The stator seat includes a first mounting portion and a second mounting portion connected to each other, the traction wheel and the second mounting portion are located on both sides of the rotor in the first direction, the second mounting cavity forms an opening on the side away from the traction wheel in the first direction, the first mounting portion defines the heat dissipation cavity, the winding is sleeved on the first mounting portion, and the second mounting portion is connected to the base and closes the opening of the second mounting cavity.

2. The traction device according to claim 1, characterized in that: An installation space is defined in the rotor, at least part of the winding and the first installation portion are arranged in the installation space, an installation opening is provided at one end of the installation space away from the traction wheel along the first direction, and at least part of the first installation portion and at least part of the winding are configured to be able to be installed in or removed from the installation space through the installation opening.

3. The traction device according to claim 1, characterized in that: A plurality of second heat dissipation ribs are arranged in the heat dissipation cavity, and the plurality of second heat dissipation ribs are arranged at intervals on the peripheral wall of the heat dissipation cavity along the circumferential direction of the rotor, and the extension direction of each second heat dissipation rib is consistent with the first direction or is arranged at an angle to the first direction.

4. The traction device according to claim 1, characterized in that: A plurality of the first heat dissipation ribs are provided, each of the first heat dissipation ribs extends along the circumferential direction of the rotor, and the plurality of the first heat dissipation ribs are arranged at intervals along the first direction.

5. The traction device according to claim 1, characterized in that: The base is provided with a heat dissipation hole communicated with the second installation cavity, and the heat dissipation hole penetrates the outer wall of the base along the wall thickness direction of the base.

6. The traction device according to any one of claims 1 to 5, characterized in that: The traction device also includes: a brake disc, wherein the brake disc is spaced apart from the traction wheel in the first direction, and a part of the machine base is disposed between the brake disc and the traction wheel along the first direction and separates the brake disc and the traction wheel; A rotating shaft extends along the first direction and is rotatably disposed on the machine base; the traction wheel, the rotor, and the brake disc are all transmission-connected to the rotating shaft.

7. The traction device according to claim 6, characterized in that: Along the first direction, the brake disc is located on the side of the traction wheel away from the driving assembly, the machine base includes an end cover embedded in the first base body, the end cover is arranged between the brake disc and the traction wheel along the first direction and separates the brake disc and the traction wheel, and the rotating shaft passes through the end cover.

8. The traction device according to claim 7, characterized in that: The traction wheel has a first connection portion connected to the rotating shaft, and the end cover includes a fourth connection portion connected to the first seat body and a fifth connection portion connected to the rotating shaft, and at least part of the fifth connection portion is located between the first connection portion and the fourth connection portion along the first direction.

9. The traction device according to claim 8, characterized in that: At least a portion of the first seat body is located between the brake disc and the traction sheave in the first direction, and at least a portion of the first seat body separates the brake disc and the traction sheave.

10. The traction device according to claim 9, characterized in that: The brake disc is arranged on a side of the first seat body away from the second seat body, the rotating shaft is rotatably arranged on the second seat body and the end cover, and the first seat body and the second seat body are both provided with bases and are connected to each other.

11. The traction device according to claim 8, characterized in that: The second seat body comprises: A mounting seat connected to the first seat body along the first direction; The connecting section has a second connecting portion and a third connecting portion which are oppositely arranged in the radial direction of the traction wheel, wherein the second connecting portion is connected to the mounting seat, and the third connecting portion is connected to the rotating shaft, and at least a part of the third connecting portion is located between the first connecting portion and the second connecting portion in the first direction.

12. The traction device according to claim 11, characterized in that: The third connection portion and the fifth connection portion are symmetrically arranged relative to the traction wheel.

13. The traction device according to claim 7, characterized in that: The traction device further comprises a first bearing, the end cover is sleeved on the first bearing, the first bearing is sleeved on the rotating shaft, and the first bearing is provided with an oil seal on a side close to the brake disc.

14. The traction device according to claim 13, characterized in that: The traction device further includes a second bearing, the second bearing is sleeved on the rotating shaft, the machine base is sleeved on the second bearing, the first bearing and the second bearing are located on both sides of the traction wheel in the first direction and are symmetrically arranged relative to the first traction wheel.

15. The traction device according to any one of claims 1 to 5, characterized in that: The first installation cavity has openings on both sides in a second direction, and the second direction is perpendicular to the first direction.

16. An elevator system, characterized in that: include: A traction device as claimed in any one of claims 1 to 15.

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