Traction machine and elevator

Abstract

The utility model provides a traction machine and an elevator. The traction machine comprises a shell assembly, the interior of the shell assembly is provided with a containing cavity, one end of the shell assembly is provided with a groove, the groove is provided with a first mounting hole, the groove and the containing cavity jointly define a magnetic coupling cavity, and the other end of the shell assembly is provided with a second mounting hole; the shaft assembly is respectively arranged in the first mounting hole and the second mounting hole in a penetrating manner; the rotor is fixedly arranged on the shaft assembly in a sleeving mode, and part of the rotor is arranged in the magnetic coupling cavity; the stator is arranged in the magnetic coupling cavity and is positioned between the rotor and the side wall of the groove; the brake is arranged on the shaft assembly in a sleeving mode and connected with the side, away from the groove, of the shell assembly. The traction machine is an outer rotor traction machine, the brake can directly brake the shaft assembly, the occupied space of the brake can be reduced, and therefore the boundary dimension and the size of the traction machine are reduced, and the universality and the adaptability of the traction machine are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the elevator technical field, and particularly to a hoisting machine and an elevator. BACKGROUND

[0002] The elevator hoisting machine is the power equipment of the elevator, and its function is to transport and transmit power to make the elevator run.

[0003] In the related art, the elevator hoisting machine adopts the rotor braking mode to realize braking of the elevator, and the braking structure is installed outside the rotor. In this way, the outer size and volume of the hoisting machine are large. When facing the machine roomless elevator type, the installation space of the hoisting machine is limited, the installation difficulty is high, and even the hoisting machine cannot be installed, and the maintenance is inconvenient, thereby affecting the universality and adaptability of the hoisting machine. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a hoisting machine and an elevator, aiming at improving the problem of low universality and adaptability of the hoisting machine caused by large outer size and volume of the hoisting machine.

[0005] In a first aspect, the embodiments of the present application provide a hoisting machine. The hoisting machine comprises: a shell assembly, which is internally provided with an accommodating cavity, one end of the shell assembly is provided with a groove, the groove is provided with a first mounting hole, the groove and the accommodating cavity jointly enclose a magnetic coupling cavity, and the other end of the shell assembly is provided with a second mounting hole; a shaft assembly, which is respectively penetrated through the first mounting hole and the second mounting hole; a rotor, which is fixedly sleeved on the shaft assembly, and part of the rotor is arranged in the magnetic coupling cavity; a stator, which is arranged in the magnetic coupling cavity and located between the rotor and the side wall of the groove; and a brake, which is sleeved on the shaft assembly and connected to the side of the shell assembly away from the groove.

[0006] The hoisting machine of the present application is an outer rotor hoisting machine, and further provided with a brake, which is sleeved on the shaft assembly and connected to the side of the shell assembly away from the groove. The brake can directly brake the shaft assembly, compared with the braking mode of the outer rotor double push drum type brake structure in the related art, the occupied space of the brake can be reduced, thereby reducing the outer size and volume of the hoisting machine, especially the height size of the hoisting machine, so that the installation space requirement of the machine roomless elevator type can be met, thereby being conducive to improving the universality and adaptability of the hoisting machine.

[0007] In some embodiments, the rotor comprises: a mounting portion, which is sleeved on the shaft assembly; a coupling portion, which is arranged in the magnetic coupling cavity, the stator is located between the coupling portion and the side wall of the groove and connected to the side wall of the groove; and a connecting portion, which connects the mounting portion and the coupling portion, and a plurality of ventilation holes are arranged on the connecting portion in a circumferential direction.

[0008] In some embodiments, the rotor further comprises a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the plurality of first reinforcing ribs and the plurality of second reinforcing ribs are respectively arranged on opposite side surfaces of the connecting portion and do not overlap the plurality of ventilation holes.

[0009] In some embodiments, the traction machine further comprises a plurality of pairs of permanent magnets connected to a side surface of the coupling portion close to the stator; wherein the plurality of pairs of permanent magnets are arranged along a circumferential direction of the coupling portion, each of the pairs of permanent magnets comprises a first permanent magnet and a second permanent magnet arranged along an axial direction of the shaft assembly, the first permanent magnet and the second permanent magnet are arranged in a staggered manner in the axial direction of the shaft assembly.

[0010] In some embodiments, the staggered angle of the first permanent magnet and the second permanent magnet in the circumferential direction of the coupling portion is greater than or equal to 2° and less than or equal to 10°.

[0011] In some embodiments, the shell assembly comprises a base and an end cover connected to each other, an inner part of the base forms the accommodation cavity, the recess is arranged on a side end surface of the base away from the end cover, the second mounting hole is arranged on the end cover, and the brake is connected to the end cover.

[0012] In some embodiments, the shaft assembly comprises a drive shaft, and a first bearing and a second bearing sleeved on the drive shaft, the first bearing is located in the first mounting hole, and the second bearing is located in the second mounting hole; the traction machine further comprises a traction sheave connected to a side surface of the connecting portion close to the brake, the base is provided with a hollow area opposite to the traction sheave, the traction sheave is provided with a first perforation, and a diameter of the first perforation is greater than a maximum diameter of the second bearing.

[0013] In some embodiments, a top of a side of the base away from the end cover is symmetrically provided with two mounting grooves in the left-right direction; the traction machine further comprises junction boxes, each of the junction boxes is mounted on one of the mounting grooves, and a top of the junction box is flush with a top of the base.

[0014] In some embodiments, a side surface of the recess away from the accommodation cavity is provided with a plurality of third reinforcing ribs.

[0015] In some embodiments, an outer surface of the base 110 is provided with a plurality of fourth reinforcing ribs.

[0016] In a second aspect, the application provides an elevator comprising the traction machine of the first aspect.

[0017] The elevator of the present application uses the traction machine of the first aspect. Wherein, the traction machine is an outer rotor traction machine, and further provided with a brake, which is sleeved on the shaft assembly and connected with the side of the housing assembly away from the groove. The brake can directly brake the shaft assembly, compared with the braking mode of the outer rotor double push drum type brake structure in the related art, the occupied space of the brake can be reduced, thereby reducing the size and volume of the traction machine, especially the height size of the traction machine, so that it can meet the installation space requirement of the machine roomless elevator type, thereby being beneficial to improve the versatility and adaptability of the traction machine and the elevator. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 The structure schematic diagram of the traction machine from one perspective according to an embodiment of the present application is provided.

[0020] Figure 2 The structure schematic diagram of the traction machine from another perspective according to an embodiment of the present application is provided.

[0021] Figure 3 The cross-sectional structure schematic diagram of the traction machine according to an embodiment of the present application is provided.

[0022] Figure 4 The structure schematic diagram of the rotor according to an embodiment of the present application is provided.

[0023] Figure 5 The cross-sectional structure schematic diagram of the rotor according to an embodiment of the present application is provided.

[0024] Figure 6 The connection structure schematic diagram of the rotor, the driving shaft and the traction sheave according to another embodiment of the present application is provided.

[0025] Figure 7 The structure schematic diagram of the traction sheave according to an embodiment of the present application is provided.

[0026] Figure 8 The structure schematic diagram of the traction machine from another perspective according to an embodiment of the present application is provided.

[0027] Explanation of reference signs:

[0028] 10, traction machine;

[0029] 100, housing assembly; 101, containing cavity; 102, groove; 1011, magnetic coupling cavity; 1021, third reinforcing rib; 103, first mounting hole; 104, second mounting hole; 110, base; 120, end cover; 1101, hollow area; 130, mounting groove; 1102, fourth reinforcing rib;

[0030] 200, shaft assembly; 210, drive shaft; 220, first bearing; 230, second bearing;

[0031] 300, rotor; 310, mounting portion; 320, coupling portion; 330, connecting portion; 331, ventilation hole; 340, first reinforcing rib; 350, second reinforcing rib;

[0032] 400, stator;

[0033] 500, brake;

[0034] 600, permanent magnet pair; 610, first permanent magnet; 620, second permanent magnet;

[0035] 700, traction sheave; 701, first perforation;

[0036] 800, junction box. DETAILED DESCRIPTION

[0037] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and not to limit the scope of the present application.

[0038] As shown in Figure 1 , Figure 2 and Figure 3 , in the first aspect, the present application embodiment proposes a traction machine 10. The traction machine 10 comprises a housing assembly 100, a shaft assembly 200, a rotor 300, a stator 400 and a brake 500. The inside of the housing assembly 100 is provided with a containing cavity 101, one end of the housing assembly 100 is provided with a groove 102, the groove 102 is provided with a first mounting hole 103, the groove 102 and the containing cavity 101 jointly enclose a magnetic coupling cavity 1011, the other end of the housing assembly 100 is provided with a second mounting hole 104, the shaft assembly 200 is respectively arranged in the first mounting hole 103 and the second mounting hole 104, the rotor 300 is fixedly sleeved on the shaft assembly 200, part of the rotor 300 is arranged in the magnetic coupling cavity 1011, the stator 400 is arranged in the magnetic coupling cavity 1011 and located between the rotor 300 and the side wall of the groove 102, and the brake 500 is sleeved on the shaft assembly 200 and connected with the side of the housing assembly 100 away from the groove 102.

[0039] In the present application, the traction machine 10 comprises a shell assembly 100, a shaft assembly 200, a rotor 300, a stator 400 and a brake 500. The shell assembly 100 is a support and mounting base of the traction machine 10, and an accommodating cavity 101 inside the shell assembly 100 is used to accommodate the shaft assembly 200, the rotor 300 and the stator 400.

[0040] One end of the shell assembly 100 is provided with a recess 102, the recess 102 is provided with a first mounting hole 103, the other end is provided with a second mounting hole 104, and the shaft assembly 200 is arranged in the first mounting hole 103 and the second mounting hole 104. That is, in the present application, the traction machine 10 is a double support structure, which is beneficial to improve the stability and safety of the traction machine 10 in operation, and at the same time, since the double support structure can provide two support points for the shaft assembly 200, the shaft assembly 200 is more uniform in stress and rotates stably, thereby also reducing the working noise.

[0041] Further, the recess 102 is recessed towards the side close to the accommodating cavity 101, so that the groove wall of the recess 102 and the accommodating cavity 101 together form a magnetic coupling cavity 1011, one end of the rotor 300 is fixedly connected with the shaft assembly 200, and the other end of the rotor 300 partially extends into the magnetic coupling cavity 1011, and the stator 400 is arranged in the magnetic coupling cavity 1011 and located between the rotor 300 and the side wall of the recess 102. In this way, the stator 400 can provide a magnetic driving force to the rotor 300, so that the rotor 300 drives the shaft assembly 200 to rotate together. And since the stator 400 is located on the inner side of the rotor 300, the traction machine 10 of the present application is an external rotor traction machine, which has the characteristics of large output torque, large power density and simple frequency conversion control.

[0042] Further, the present application also provides the brake 500, the brake 500 is sleeved on the shaft assembly 200 and connected with the side of the shell assembly 100 away from the recess 102. The brake 500 can be a disc brake, for example. In this way, the brake 500 can directly brake the shaft assembly 200, compared with the braking mode of the external rotor double push drum type brake structure in the related art, the occupied space of the brake 500 can be reduced, thereby reducing the size and volume of the traction machine 10, especially the height size of the traction machine 10, so that it can meet the installation space requirement of the machine roomless elevator type, thereby being beneficial to improve the versatility and adaptability of the traction machine 10.

[0043] In some embodiments, as Figure 3As shown, the shaft assembly 200 includes a driving shaft 210, a first bearing 220 and a second bearing 230 sleeved on the driving shaft 210, the first bearing 220 is located in the first mounting hole 103, the second bearing 230 is located in the second mounting hole 104, and the brake 500 is sleeved on the driving shaft 210. In this way, a double support structure for the driving shaft 210 can be realized, the stability and safety of the traction machine 10 in operation are improved, at the same time, the brake 500 directly brakes the driving shaft 210, which is also conducive to reducing the size and volume of the traction machine 10, and improving the versatility and adaptability of the traction machine 10.

[0044] In some embodiments, as shown in Figure 3 、 Figure 4 and Figure 5 , the rotor 300 includes a mounting portion 310, a coupling portion 320 and a connecting portion 330, the mounting portion 310 is sleeved on the shaft assembly 200, specifically, the mounting portion 310 is sleeved on the driving shaft 210 and located between the first bearing 220 and the second bearing 230. The coupling portion 320 is located in the magnetic coupling cavity 1011, the stator 400 is located between the coupling portion 320 and the side wall of the groove 102 and connected with the side wall of the groove 102, the connecting portion 330 connects the mounting portion 310 and the coupling portion 320, and the connecting portion 330 is provided with a plurality of ventilation holes 331 which are spaced apart in the circumferential direction.

[0045] The present embodiment proposes a specific structure of the rotor 300. The coupling portion 320 of the rotor 300 is used to realize magnetic coupling with the stator 400, and the mounting portion 310 is fixedly connected with the driving shaft 210 of the shaft assembly 200. In this way, the rotor 300 can rotate under the magnetic driving of the stator 400, thereby driving the driving shaft 210 to rotate.

[0046] Further, the connecting portion 330 of the rotor 300 is provided with a plurality of ventilation holes 331, and when the rotor 300 rotates, the air is disturbed to enter the magnetic coupling cavity 1011 in which the rotor 300 and the stator 400 are located through the ventilation holes 331, thereby realizing heat dissipation in the magnetic coupling cavity 1011. Moreover, the stator 400 is connected with the side wall of the groove 102, so that the side wall of the groove 102 can dissipate heat from the stator 400 through heat conduction. In this way, it is conducive to improving the heat dissipation effect of the traction machine 10, thereby improving the reliability and service life of the traction machine 10 in operation.

[0047] In some embodiments, as shown in Figures 3 to 5As shown, the rotor 300 further comprises a plurality of first reinforcing ribs 340 and a plurality of second reinforcing ribs 350, which are respectively arranged on the opposite two side surfaces of the connecting portion 330 and do not overlap the plurality of ventilation holes 331. In this way, on the one hand, the ventilation holes 331 are not blocked, thereby facilitating the improvement of the heat dissipation effect. On the other hand, the rotor 300 realizes the weight reduction design, thereby facilitating the lightweight requirement of the traction machine 10. On the third hand, the first reinforcing ribs 340 and the second reinforcing ribs 350 can structurally reinforce the connecting portion 330 of the rotor 300, thereby facilitating the improvement of the structural strength and fatigue strength of the rotor 300.

[0048] In some embodiments, as shown in Figure 3 and Figure 6 The traction machine 10 further comprises a plurality of permanent magnet pairs 600 connected to the side surface of the coupling portion 320 close to the stator 400, wherein the plurality of permanent magnet pairs 600 are arranged along the circumferential direction of the coupling portion 320, each permanent magnet pair 600 comprises a first permanent magnet 610 and a second permanent magnet 620 arranged along the axial direction of the shaft assembly 200, and the first permanent magnet 610 and the second permanent magnet 620 are arranged in a staggered manner in the axial direction of the shaft assembly 200.

[0049] In this embodiment, the rotor 300 is attached to the plurality of permanent magnet pairs 600 close to the side surface of the stator 400, and the first permanent magnet 610 and the second permanent magnet 620 of each permanent magnet pair 600 are arranged in a staggered manner in the axial direction of the shaft assembly 200. In this way, on the one hand, a more dense and powerful magnetic field can be formed around the coupling portion 320, thereby facilitating the improvement of the output power and torque of the traction machine 10, and meeting the requirement of large load lifting of the elevator and other equipment. On the other hand, the first permanent magnet 610 and the second permanent magnet 620 are arranged in a staggered manner in the axial direction of the shaft assembly 200, which can change the distribution rule of the magnetic field, so that the originally concentrated harmonic magnetic field at some specific frequency can be dispersed, and the magnetic field harmonic components of the first permanent magnet 610 and the second permanent magnet 620 can be offset to a certain extent, thereby facilitating the reduction of the strength of the magnetic field harmonic, and further facilitating the reduction of the torque ripple amplitude of the traction machine 10.

[0050] In some embodiments, as shown in Figure 6As shown, the dislocation angle of the first permanent magnet 610 and the second permanent magnet 620 in the circumferential direction of the coupling portion 320 is greater than or equal to 2° and less than or equal to 10°. If the dislocation angle is too small, a better harmonic suppression effect can not be generated; if the dislocation angle is too large, on the one hand, it is not conducive to installation and fixation, and on the other hand, it will make the interference between the magnetic field of the first permanent magnet 610 and the magnetic field of the second permanent magnet 620 too large, thereby affecting the normal magnetic field distribution. That is, by setting the dislocation angle to be between 2° and 10° in the embodiment, the magnetic fields generated by the first permanent magnet 610 and the second permanent magnet 620 can form a suitable spatial phase difference, thereby effectively modulating the magnetic field generated by the stator 400, enhancing the harmonic suppression capability of the magnetic field, and making the magnetic field distribution closer to an ideal sinusoidal wave, thereby facilitating reduction of the magnetic field harmonic content and the torque ripple amplitude of the traction machine 10. Alternatively, the dislocation angle can be 2°, 4°, 5°, 6°, 7°, 8°, 9°, 10°, etc., and can be flexibly designed according to actual conditions.

[0051] It should be noted that the measurement method of the dislocation angle is, for example, Figure 6 As shown, a first projection line of the first axis L1 of the first permanent magnet 610 is formed on the coupling portion 320, a second projection line of the second axis L2 of the second permanent magnet 620 is formed on the coupling portion 320, and the central angle corresponding to the arc length between the first projection line and the second projection line is the dislocation angle.

[0052] In some embodiments, as shown in Figure 3 The shell assembly 100 includes a base 110 and an end cover 120 connected to each other, the inside of the base 110 forms an accommodation cavity 101, a groove 102 is arranged on the side end face of the base 110 away from the end cover 120, a second mounting hole 104 is arranged on the end cover 120, and the brake 500 is connected to the end cover 120. In this way, the compactness of the traction machine 10 can be improved, space waste can be avoided, and the convenience of disassembling the traction machine 10 can be improved.

[0053] In some embodiments, as shown in Figures 1 to 3 and referring to Figure 7 The traction machine 10 further includes a traction wheel 700, the traction wheel 700 is connected to the side surface of the connecting portion 330 close to the brake 500, the base 110 is provided with a hollow area 1101 opposite to the traction wheel 700, the traction wheel 700 is provided with a first perforation 701, and the diameter of the first perforation 701 is greater than the maximum diameter of the second bearing 230.

[0054] In the embodiment, the traction machine 10 further comprises a traction wheel 700, the traction wheel 700 is connected with the connecting portion 330 of the rotor 300 directly, and the traction wheel 700 is communicated with the outside through the hollow area 1101. Thus, the weight of the traction machine 10 can be reduced, the material cost can be reduced, and the heat dissipation performance of the traction machine 10 can be improved. In addition, the diameter of the first perforation 701 of the traction wheel 700 is greater than the maximum diameter of the second bearing 230. In this way, the traction wheel 700 can be replaced without disassembling the second bearing 230, so that the convenience of disassembling the traction wheel 700 can be improved, and the convenience of maintaining and repairing the traction machine 10 can be improved.

[0055] In some embodiments, as shown in Figure 1 and Figure 8 the top of the side of the frame 110 away from the end cover 120 is symmetrically provided with two installation grooves 130 along the left-right direction, and the traction machine 10 further comprises two junction boxes 800, each junction box 800 is installed on one installation groove 130, and the top of the junction box 800 is flush with the top of the frame 110.

[0056] In the embodiment, the traction machine 10 further comprises two junction boxes 800, the two junction boxes 800 are wired from the left and right sides of the frame 110, and the top of the junction box 800 is flush with the top of the frame 110. Thus, the height dimension of the traction machine 10 can be further reduced, so that the adaptability and versatility of the traction machine 10 can be further improved. In addition, the frame 110 is connected with the junction box 800 through the installation groove 130, so that the weight of the frame 110 can be further reduced, and the lightweight requirement of the traction machine 10 can be further realized.

[0057] In some embodiments, as shown in Figure 1 the side surface of the recess 102 away from the accommodating cavity 101 is provided with a plurality of third reinforcing ribs 1021. In this way, the weight of the frame 110 can be reduced, and the strength of the frame 110 can be further improved, so that the service life and reliability of the traction machine 10 can be improved.

[0058] In some embodiments, the outer surface of the frame 110 is provided with a plurality of fourth reinforcing ribs 1102, for example, the fourth reinforcing ribs 1102 can be distributed on at least one of the top, bottom and side of the frame 110. The fourth reinforcing ribs 1102 can support and strengthen the structure of the frame 110, so that the strength and reliability of the frame 110 can be further improved.

[0059] In the second aspect, the application provides an elevator comprising the traction machine 10 of the first aspect. In this way, the brake 500 can directly brake the shaft assembly 200, compared with the braking mode of the outer rotor double-push drum type brake structure in the prior art, the occupied space of the brake 500 can be reduced, thereby reducing the size and volume of the traction machine 10, especially the height size of the traction machine 10, so that the installation space requirement of the machine roomless elevator type can be met, thereby facilitating to improve the versatility and adaptability of the traction machine 10 and the elevator.

[0060] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0061] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0062] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0063] In the present application, "above", "above" and "above" of the first feature to the second feature can be directly above or obliquely above the first feature to the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature to the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0064] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A traction machine, characterized in that, include: The housing assembly has an internal receiving cavity, one end of the housing assembly has a groove, the groove has a first mounting hole, the groove and the receiving cavity together form a magnetic coupling cavity, and the other end of the housing assembly has a second mounting hole; The shaft assembly is respectively inserted into the first mounting hole and the second mounting hole; The rotor is fixedly sleeved on the shaft assembly, and a portion of the rotor is disposed within the magnetic coupling cavity; The stator is disposed within the magnetic coupling cavity and located between the rotor and the sidewall of the groove; A brake is fitted onto the shaft assembly and connected to the side of the housing assembly opposite to the groove.

2. The traction machine according to claim 1, characterized in that, The rotor includes: The mounting part is fitted onto the shaft assembly; A coupling part is disposed within the magnetic coupling cavity, and the stator is located between the coupling part and the sidewall of the groove and is connected to the sidewall of the groove; A connecting part connects the mounting part and the coupling part, and the connecting part is provided with a plurality of ventilation holes at intervals along the circumference.

3. The traction machine according to claim 2, characterized in that, The rotor also includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, which are respectively disposed on opposite sides of the connecting portion and do not overlap with the plurality of ventilation holes.

4. The traction machine according to claim 2, characterized in that, The traction machine also includes a plurality of permanent magnet pairs connected to the side surface of the coupling part near the stator; The plurality of permanent magnet pairs are arranged along the circumferential direction of the coupling portion, and each permanent magnet pair includes a first permanent magnet and a second permanent magnet arranged along the axial direction of the shaft assembly. The first permanent magnet and the second permanent magnet are staggered in the axial direction of the shaft assembly.

5. The traction machine according to claim 4, characterized in that, The misalignment angle between the first permanent magnet and the second permanent magnet in the circumferential direction of the coupling portion is greater than or equal to 2° and less than or equal to 10°.

6. The traction machine according to claim 2, characterized in that, The housing assembly includes a base and an end cap connected to each other. The housing cavity is formed inside the base. The groove is provided on the end face of the base opposite to the end cap. The second mounting hole is provided on the end cap. The brake is connected to the end cap.

7. The traction machine according to claim 6, characterized in that, The shaft assembly includes a drive shaft and a first bearing and a second bearing sleeved on the drive shaft, wherein the first bearing is located in the first mounting hole and the second bearing is located in the second mounting hole. The traction machine also includes a traction sheave, which is connected to the side surface of the connecting part near the brake. The machine base has a hollow area opposite to the traction sheave, and the traction sheave has a first through hole, the diameter of which is larger than the maximum diameter of the second bearing.

8. The traction machine according to claim 6, characterized in that, The top of the base on the side opposite to the end cover has two mounting slots symmetrically arranged in the left-right direction. The traction machine also includes a junction box, each junction box being installed in a mounting slot, with the top of the junction box flush with the top of the machine base.

9. The traction machine according to claim 1, characterized in that, The groove has multiple third reinforcing ribs on the side surface facing away from the receiving cavity; The housing assembly includes an interconnected base and an end cap, and the outer surface of the base is provided with a plurality of fourth reinforcing ribs.

10. An elevator, characterized in that, Includes the traction machine as described in any one of claims 1-9.

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