Hoisting machine rotor assembly and elevator hoisting machine thereof

Abstract

The application relates to the elevator technical field, in particular to a hoisting machine rotor assembly and an elevator hoisting machine. The hoisting machine rotor assembly comprises a rotor core, rotor teeth and permanent magnets, a plurality of rotor teeth are uniformly separated and arranged along the circumference of the rotor core, an installation groove is formed between two adjacent rotor teeth, and the permanent magnets are installed into the corresponding installation grooves; the hoisting machine rotor assembly comprises a plurality of slot wedges, two third protrusions are arranged at the end of the rotor tooth away from the rotor core, the two third protrusions respectively extend along the circumferential direction of the hoisting machine rotor assembly and towards the two sides of the rotor tooth; one side of the slot wedge is connected with the permanent magnet, and the other side abuts against the side wall of at least one third protrusion towards the rotor core. The advantages are that the slot wedge is located between the permanent magnet and the third protrusion, the permanent magnet is limited, the collision between the permanent magnet and the third protrusion can be buffered, the stress can be uniformly distributed, and the problems such as structural damage and deformation are reduced.

Description

TECHNICAL FIELD

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

[0002] The surface-mounted neodymium-iron-boron permanent magnet is generally used in the rotor assembly of the elevator traction machine, and the rotor assembly is generally arranged in the stator. The action force is generated between the stator and the permanent magnet on the rotor assembly by energizing the stator, so as to drive the rotation of the rotor assembly, thereby driving the rotation of the rotating shaft. However, the neodymium-iron-boron permanent magnet is a strategic resource of "rare earth material", and the cost is high and the market fluctuation is large, which obviously limits the market application and promotion of the more efficient motor. Since the magnetism of the ordinary permanent magnet material is not as good as that of the "rare earth material", if the "rare earth material" is replaced by the ordinary permanent magnet material, in order to meet the efficiency requirement, the volume of the permanent magnet material needs to be increased accordingly, and the traditional surface-mounted arrangement mode needs to be changed.

[0003] In view of the above problems, the existing traction machine rotor assembly generally arranges the permanent magnet between the rotor teeth, but this kind of traction machine rotor assembly is generally used in household appliances and other high-speed and low-torque scenes. If this kind of traction machine is applied to the elevator field, due to its small size and low torque, it cannot meet the requirements of the elevator field. If the size of each part is enlarged in order to increase the torque, the permanent magnet will not be firmly limited, and the problem of easy collision and damage during work will occur. SUMMARY

[0004] Therefore, the present application provides a traction machine rotor assembly and an elevator traction machine thereof aiming at the above technical problems:

[0005] A traction machine rotor assembly, comprising a rotor core, rotor teeth and permanent magnets, the rotor teeth are multiple, and the multiple rotor teeth are uniformly separated and arranged along the circumference of the rotor core, an installation slot is formed between two adjacent rotor teeth, the number of the permanent magnets corresponds to the number of the installation slots, and the permanent magnets are installed in the corresponding installation slots.

[0006] The traction machine rotor assembly comprises a plurality of slot wedges, two third protrusions are arranged at one end of the rotor teeth away from the rotor core, the two third protrusions respectively extend to the two sides of the rotor teeth along the circumferential direction of the traction machine rotor assembly, and the slot wedges are in abutment between the permanent magnets and the inner wall of the third protrusion towards the rotor core.

[0007] During the operation of the rotor assembly, the permanent magnets will be subjected to the centripetal force radially outward, and the slot wedges are located between the permanent magnets and the third protrusions. The slot wedges can not only limit the permanent magnets, but also buffer the collision between the permanent magnets and the third protrusions, evenly distribute the stress, and reduce the occurrence of structural damage and deformation.

[0008] In one of the embodiments, the third protrusion has a first inclined surface, and the side surface of the slot wedge away from the rotor core has a second inclined surface, the first inclined surface and the second inclined surface are in abutment.

[0009] In this way, the first inclined surface and the second inclined surface can divide the original radial impact force into horizontal force and radial force, thereby avoiding damage to the slot wedge and the third protrusion.

[0010] In one of the embodiments, a plurality of the rotor teeth are connected to form a rotor tooth group, and along the axis direction of the rotor core, both sides of the rotor tooth group are provided with flat plate annular end plates and are limited by the end plates.

[0011] The traction machine rotor assembly further comprises a limiting member, the limiting member comprises a penetrating part and a limiting part, the penetrating part penetrates the rotor tooth group and the end plate, the limiting part is located at both ends of the penetrating part and can move towards each other, and the penetrating part can move the end plates on both sides of the rotor tooth group towards each other to clamp and limit the end plates and the rotor tooth group.

[0012] In this way, since the rotor tooth group is formed by a plurality of rotor teeth connected to each other, it is easy to spread during the operation of the traction machine rotor assembly, and the limiting member can clamp and limit the rotor tooth group through the end plates on both sides of the rotor tooth group to avoid the above problems.

[0013] In one of the embodiments, each of the rotor teeth comprises an extension part and a fixed part, the extension parts of two adjacent rotor teeth form the mounting slot, the rotor core is injection molded by a non-magnetic material, the fixed part of the rotor tooth is fixed to the rotor core by injection molding, and the rotor core partially protrudes into the mounting slot.

[0014] In this way, the rotor core injection molded by a non-magnetic material does not affect the magnetism of the permanent magnet, and is more tightly and firmly connected with the fixed part of the rotor tooth.

[0015] In one of the embodiments, at least one fixing groove is formed on the fixed part of the rotor tooth, the groove wall of the fixing groove comprises a side wall and an arc-shaped bottom wall, the bottom wall is provided in a corrugated shape, and at least part of the rotor core can be fused into the fixing groove when the rotor core is injection molded and fixed with the fixed part.

[0016] In this way, the fixing groove can increase the contact area between the fixing portion and the rotor core, thereby improving the connection strength between the fixing portion and the rotor core, preventing the rotor teeth from loosening and falling off during the operation of the rotor assembly, and preventing the injection material from flowing into the fixing groove during the injection molding process of the rotor core. According to the shape of the groove wall, the rotor core and the fixing portion can have higher tightness. The corrugated bottom wall can further increase the contact area between the fixing portion and the rotor core.

[0017] In one embodiment, the fixing portion includes a first body, a first protrusion and a second protrusion, the first body is provided with the first protrusion and the second protrusion on both sides along the circumferential direction of the rotor core, the first protrusion and the second protrusion on the same side are arranged at intervals, and the first protrusion, the second protrusion and the first body cooperate to form the fixing groove.

[0018] Compared with the method of directly opening the fixing groove, the fixing groove formed by the above method has a larger contact area with the rotor core, further improving the connection strength. Moreover, the second protrusion away from the side of the fixing groove can also abut against the limiting permanent magnet, making the installation of the permanent magnet more stable.

[0019] In one embodiment, the extension portion includes a second body and a third protrusion, the second body is provided with a third protrusion at one end away from the fixing portion, the third protrusion, the second body and the second protrusion cooperate to form an installation groove, and the permanent magnet is embedded and fixed in the installation groove.

[0020] In this way, the permanent magnet is subjected to limiting forces in various directions from the second protrusion, the second body and the third protrusion, thereby improving the installation strength of the permanent magnet.

[0021] In one embodiment, the first protrusion and the second protrusion extend towards the direction away from the first body, the line connecting the ends of the first protrusion and the second protrusion is a first line, and the first line is parallel to the groove bottom of the installation groove extending in the radial direction of the rotor core.

[0022] In this way, the arrangement of the rotor teeth can be more orderly, and the positioning strength and the connection strength can be ensured without reducing the utilization rate.

[0023] In one embodiment, along the axial direction of the rotor core, a plurality of rotor teeth are formed by a plurality of rotor laminations stacked with each other, the extension portion is provided with at least one self-riveting section, the self-riveting section is provided with a self-riveting groove and a self-riveting protrusion, and the self-riveting protrusion can abut against the self-riveting groove on the adjacent rotor lamination, so that the adjacent rotor laminations can be limited.

[0024] In this way, the rotor laminations can be limited to each other, a self-riveting effect is formed, and the dispersion is avoided.

[0025] The application further provides an elevator traction machine comprising the rotor assembly as described above, the elevator traction machine comprising a rotating shaft penetrating the rotor assembly, a key groove is arranged on the inner side wall of the rotor core, and a connecting key matched with the key groove is arranged on the outer circumferential side of the rotating shaft, so that the rotor core can drive the rotating shaft to rotate through the connecting key.

[0026] Compared with the prior art, the application adds the slot wedge to improve the fastening of the connection of each structure in the rotor assembly of the traction machine, in the operation process of the rotor assembly of the traction machine, the permanent magnet is subjected to the centripetal force radially outward, the slot wedge is located between the permanent magnet and the rotor tooth, the slot wedge has the limiting effect on the permanent magnet and also has the buffering effect on the collision between the permanent magnet and the rotor tooth, so that the stress is evenly distributed, and the problems such as structural damage and deformation are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 A radial sectional view of the rotor assembly provided by the application is shown in the figure;

[0028] Fig. 2 An axial sectional view of the rotor assembly provided by the application is shown in the figure;

[0029] Fig. 3 A structure schematic view of the rotor tooth and the permanent magnet provided by the application is shown in the figure.

[0030] The meanings of the symbols in the figure are as follows:

[0031] 100, the rotor assembly of the traction machine; 101, the rotor tooth set; 10, the rotor tooth; 11, the fixed part; 111, the fixed groove; 1111, the side wall; 1112, the bottom wall; 112, the first protrusion; 113, the first body; 114, the second protrusion; 115, the first connecting line; 12, the extension part; 121, the second body; 123, the third protrusion; 1231, the first inclined surface; 124, the self-riveting section; 125, the limiting hole; 14, the mounting groove; 20, the rotor core; 21, the key groove; 30, the permanent magnet; 40, the slot wedge; 41, the second inclined surface; 50, the end plate; 60, the limiting piece; 61, the penetrating part; 62, the limiting part; 70, the rotating shaft. DETAILED DESCRIPTION

[0032] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the detailed description of the specific embodiments of the present application is made below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners according to the teachings of the present application, and thus the present application is not limited to the specific embodiments disclosed below. Instead, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0033] It is to be noted that when a component is referred to as being "on" or "disposed on" another component, it can be directly on the other component or there can be intervening components present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or there can be intervening components present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in the description of the specification are for the purpose of illustration only and do not indicate an exclusive embodiment.

[0034] In addition, the terms "first", "second", and the like, are used merely to describe the various components and do not imply or suggest relative importance or a quantity of the specified technical features. Thus, a feature defined with "first", "second" can include at least one of the feature explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, and the like, unless otherwise explicitly specified and limited.

[0035] In the present application, unless otherwise explicitly specified and limited, the "on", "under", "above", and "over" of a first feature to a second feature can be that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the "above", "over", and "on" of the first feature to the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "under", and "under" of the first feature to the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more of the related listed items.

[0037] Please refer to Figs. 1-3 The present application provides a traction machine rotor assembly 100, applied to the field of elevator technology, for driving the traction machine to rotate and thus moving the car.

[0038] A traction machine rotor assembly 100, comprising a rotor core 20, a rotor tooth 10, and a permanent magnet 30, the rotor tooth 10 has a plurality, and the plurality of rotor teeth 10 are uniformly separated along the circumference of the rotor core 20, and an installation groove 14 is formed between the two adjacent rotor teeth 10, the number of permanent magnets 30 corresponds to the number of installation grooves 14, and the permanent magnet 30 is installed in the corresponding installation groove 14.

[0039] The traction machine rotor assembly 100 is installed in the stator of the traction machine, and when the stator is energized to generate magnetism, it will generate mutual force with the permanent magnet 30, so that the permanent magnet 30 drives the traction machine rotor assembly 100 to rotate. Understandably, in the present embodiment, the permanent magnet 30 can be made of ferrite magnetic steel material, and in other embodiments, the permanent magnet 30 can also be made of other magnetic materials, and is not limited to the ferrite magnetic steel described in the present embodiment.

[0040] The traction machine rotor assembly 100 comprises a plurality of slot wedges 40, the slot wedge 40 is installed on the end face of the permanent magnet 30 away from the rotor core 20, and is limited by the rotor tooth 10. Because the permanent magnet 30 will be subjected to a centripetal force radially outward during the operation of the traction machine rotor assembly 100, the slot wedge 40 is arranged between the permanent magnet 30 and the rotor tooth 10, which not only limits the permanent magnet 30, but also buffers the impact between the permanent magnet 30 and the rotor tooth 10, evenly distributes the stress, and reduces the occurrence of structural damage and deformation and other problems.

[0041] Specifically, the rotor tooth 10 is provided with at least one third protrusion 123 at the end away from the rotor core 20, and the third protrusion 123 extends away from the rotor tooth 10 along the circumferential direction of the traction machine rotor assembly.

[0042] One side of the slot wedge 40 is connected with the permanent magnet 30, and the other side abuts against the inner wall of the third protrusion 123 toward the rotor core 20. The third protrusion 123 can enhance the limiting effect on the permanent magnet 30, and the slot wedge 40 can buffer the impact between the permanent magnet 30 and the third protrusion 123.

[0043] Preferably, the third protrusion 123 is two, and the two third protrusions 123 respectively extend along the circumferential direction of the traction machine rotor assembly 100 and towards the two sides of the rotor tooth 10. In this way, the third protrusions 123 on both sides of the rotor tooth 10 can cooperate with the slot wedge 40 to limit, and one slot wedge 40 can also be limited by two third protrusions 123 at the same time.

[0044] Further, the third protrusion 123 of the rotor tooth 10 has a first inclined surface 1231, the side surface of the slot wedge 40 away from the rotor core 20 has a second inclined surface 41, and the first inclined surface 1231 is in abutment with the second inclined surface 41 of the slot wedge 40. The first inclined surface 1231 and the second inclined surface 41 can divide the original radial impact force into a horizontal force and a radial force, thereby avoiding damage to the slot wedge 40 and the third protrusion 123.

[0045] Each rotor tooth 10 includes an extension portion 12 and a fixed portion 11, the extension portions 12 of two adjacent rotor teeth 10 form a mounting groove 14, the fixed portion 11 is located at one end of the extension portion 12, and at least one fixed groove 111 is formed on the fixed portion 11. The rotor core 20 is connected with the fixed portion 11, and at least part of the rotor core 20 is connected with the groove wall of the fixed groove 111.

[0046] In this way, the fixed groove 111 can increase the contact area of the fixed portion 11 and the rotor core 20, thereby improving the connection strength of the fixed portion 11 and the rotor core 20, and preventing the rotor tooth 10 from loosening and falling off during operation of the traction machine rotor assembly 100.

[0047] Preferably, the rotor core 20 is injection molded by a non-magnetic material. During injection molding of the rotor core 20, the rotor core 20 is injection molded with the fixed portion 11, and at least part of the rotor core 20 can be fused into the fixed groove 111 and in contact with the groove wall of the fixed groove 111. The fixed portion 11 is fixed to the rotor core 20 by injection molding, and part of the rotor core 20 protrudes into the mounting groove 14.

[0048] During the injection molding process of the rotor core 20, the injection molding material will flow into the fixed groove 111 and be solidified according to the shape of the groove wall of the fixed groove 111. In this way, the rotor core 20 and the fixed portion 11 can have higher tightness.

[0049] During assembly, the position of each rotor tooth 10 is first positioned uniformly by a mold, and then the rotor core 20 is injection molded.

[0050] Specifically, the groove wall of the fixed groove 111 includes a side wall 1111 and an arc-shaped bottom wall 1112, and the bottom wall 1112 is provided in a corrugated shape. In this way, the corrugated bottom wall 1112 can further increase the contact area of the fixed portion 11 and the rotor core 20.

[0051] It can be understood that in other embodiments, the bottom wall 1112 can also be provided in other shapes that can increase the contact area of the fixed portion 11 and the rotor core 20, such as being provided with a plurality of grooves or a plurality of protrusions, etc., which can increase the contact area of the fixed portion 11 and the rotor core 20, thereby improving the connection strength therebetween.

[0052] The fixing part 11 comprises a first body 113, a first protrusion 112 and a second protrusion 114, the first body 113 is provided with the first protrusion 112 and the second protrusion 114 on both sides along the circumferential direction of the rotor core 20, the first protrusion 112 and the second protrusion 114 located on the same side are arranged at intervals, and the first protrusion 112, the second protrusion 114 and the first body 113 cooperate to form a fixing groove 111. Compared with the way of directly opening the fixing groove 111, the contact area of the fixing groove 111 formed by the above-mentioned way with the rotor core 20 is larger, and the connection strength is further improved. And the side of the second protrusion 114 away from the fixing groove 111 can also abut against the limiting permanent magnet 30, so that the installation of the permanent magnet 30 is more stable.

[0053] Further, the first protrusion 112 and the second protrusion 114 both extend towards the direction away from the first body 113, the line connecting the end of the first protrusion 112 and the end of the second protrusion 114 is a first line 115, and the first line 115 is parallel to the groove bottom of the mounting groove 14. In this way, the arrangement of the rotor teeth 10 can be more orderly, and the positioning strength and the connection strength can be ensured without reducing the utilization rate.

[0054] The extension part 12 comprises a second body 121 and a third protrusion 123, the second body 121 is provided with the third protrusion 123 at one end away from the fixing part 11, the third protrusion 123, the second body 121 and the second protrusion 114 cooperate to form the mounting groove 14, and the permanent magnet 30 is embedded in the mounting groove 14 along one side of the circumferential direction of the rotor core 20 and is fixed and limited by the mounting groove 14.

[0055] In this way, the permanent magnet 30 will be subjected to limiting force in various directions of the second protrusion 114, the second body 121 and the third protrusion 123 at the same time, thereby improving the strength of the installation of the permanent magnet 30.

[0056] Along the axis direction of the rotor core 20, a plurality of rotor teeth 10 are arranged by a plurality of rotor punching sheets stacked with each other, and at least one self-riveting section 124 is formed on the extension part 12, the self-riveting section 124 is provided with a self-riveting groove and a self-riveting protrusion, and the self-riveting protrusion can abut against the self-riveting groove on the adjacent rotor punching sheet to limit the adjacent rotor punching sheets. In this way, the rotor punching sheets can be limited to each other, a self-riveting effect is formed, and the dispersion is avoided.

[0057] The rotor punching sheet in the embodiment is formed by stamping to form the self-riveting groove and the self-riveting protrusion, and the stamping process is convenient and fast, and the cost is low.

[0058] The rotor teeth 10 are formed by stacking and pressing the plurality of rotor laminations, and the self-riveting sections 124 are also formed on the rotor teeth 10. Preferably, three self-riveting sections 124 are arranged on one rotor lamination, and thus three self-riveting sections 124 are arranged on the rotor teeth 10 formed by connecting the plurality of rotor laminations, and the three self-riveting sections 124 are located in the extension portion 12. Among them, two self-riveting sections 124 are close to the third protrusion 123, and the other self-riveting section 124 is close to the fixed portion 11, so that the three self-riveting protrusions and the self-riveting grooves of the adjacent two rotor teeth 10 can be matched with each other, and the self-riveting sections 124 are uniformly arranged, so that the matching effect between the adjacent two rotor teeth 10 is more uniform.

[0059] Of course, it is understood that the number of self-riveting sections 124 on the rotor teeth 10 is not limited to three as described above, and the number of self-riveting sections 124 can be increased or decreased according to the working conditions.

[0060] The plurality of rotor teeth 10 are connected to each other through the self-riveting sections 124 to form a rotor tooth group 101, and the number of rotor teeth 10 in the rotor tooth group 101 is 3, 4, 5, 6, or 7, etc. The number of rotor teeth 10 in one rotor tooth group 101 is not specifically limited, and can be adaptively adjusted according to the working conditions of the traction machine to cope with different power ranges and speed ranges. When the torque demand is large, the number of rotor teeth 10 can be increased accordingly, and when the torque demand is small or a smaller volume is required, the number of rotor teeth 10 can be reduced accordingly. The self-riveting sections 124 on the rotor tooth group 101 can also play a positioning role.

[0061] Along the axis direction of the rotor core 20, the two sides of the rotor tooth group 101 are provided with flat plate circular ring-shaped end plates 50. The traction machine rotor assembly 100 further comprises a limiting piece 60, which comprises a penetrating portion 61 and a limiting portion 62. Limiting holes 125 are arranged on the rotor teeth 10, and the penetrating portion 61 penetrates the limiting holes 125 on the plurality of rotor teeth 10 and the end plates 50. The limiting portion 62 is located at both ends of the penetrating portion 61 and can move towards each other. The penetrating portion 61 can move the end plates 50 on both sides of the rotor tooth group 101 towards each other to clamp the end plates 50 and the rotor tooth group 101.

[0062] Since the rotor tooth group 101 is formed by connecting the plurality of rotor teeth 10 to each other, it is easy to spread apart during the operation of the traction machine rotor assembly 100. The limiting piece 60 can clamp the rotor tooth group 101 through the end plates 50 on both sides of the rotor tooth group 101 to avoid the above problems.

[0063] Specifically, the limiting piece 60 is a screw rod, which penetrates the plurality of rotor teeth 10 in the rotor tooth group 101 and the end plates 50. The two ends of the screw rod can tighten the end plates 50 on both sides, so that the combination of each rotor tooth 10 in the rotor tooth group 101 is more compact.

[0064] It can be understood that the number of limit members 60 and limit holes 125 can also be increased accordingly according to the working conditions, thereby further improving the connection strength of the rotor tooth group 101 and preventing the rotor tooth 10 from loosening during the operation of the traction machine.

[0065] Further, the diameter of the end plate 50 is greater than the distance between the two opposite slot wedges 40 distributed on the traction machine rotor assembly 100, but smaller than the diameter of the traction machine rotor assembly 100, so as to be able to stop the slot wedge 40 while not extending the rotor tooth 10 away from the side of the rotor core 20 to avoid interference with other elements during the rotation of the traction machine rotor assembly 100.

[0066] The present application also provides an elevator traction machine comprising the rotor assembly as described above, the elevator traction machine comprising a rotating shaft 70 penetrating the rotor assembly, the inner side wall of the rotor core 20 is provided with a key groove 21, and the outer circumferential side of the rotating shaft 70 is provided with a connecting key matched with the key groove 21, and the rotor core 20 can drive the rotating shaft 70 to rotate through the connecting key.

[0067] Preferably, the elevator traction machine is applied to a working condition with a torque of 50 N·m to 500 N·m, and the size of the above-mentioned traction machine rotor assembly 100 needs to be increased accordingly in such a large torque working condition. On this basis, the rotor core 20 is formed by injection molding, which is lower in cost and facilitates the formation of a deeper key groove 21, thereby improving the connection effect of the connecting key of the rotating shaft 70.

[0068] It can be understood that the number of key grooves 21 on the rotor core 20 and the number of key grooves 21 on the rotating shaft 70 can be increased accordingly according to the working conditions to cope with different power ranges and speed ranges.

[0069] Compared with the prior art, the present application improves the fastening of the connection of each structure in the traction machine rotor assembly 100 by adding the slot wedge 40. During the operation of the traction machine rotor assembly 100, the permanent magnet 30 will be subjected to a centripetal force radially outward. The slot wedge 40 is located between the permanent magnet 30 and the rotor tooth 10. The slot wedge 40 not only has a limiting effect on the permanent magnet 30, but also has a buffering effect on the collision between the permanent magnet 30 and the rotor tooth 10, evenly distributes the stress, and reduces the occurrence of structural damage and deformation.

[0070] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0071] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A traction machine rotor assembly, comprising a rotor core (20), a rotor tooth (10), and a permanent magnet (30), wherein the rotor tooth (10) is provided in plurality, and the plurality of rotor teeth (10) are evenly spaced apart along the circumference of the rotor core (20), and an installation slot (14) is formed between two adjacent rotor teeth (10), the number of the permanent magnets (30) corresponds to the number of the installation slots (14), and the permanent magnets (30) are installed in the corresponding installation slots (14) ; characterized in that The traction machine rotor assembly comprises a plurality of slot wedges (40), and two third protrusions (123) are provided on the end of the rotor tooth (10) away from the rotor core (20), and the two third protrusions (123) extend towards the two sides of the rotor tooth (10) along the circumferential direction of the traction machine rotor assembly, and the slot wedge (40) abuts between the permanent magnet (30) and at least one third protrusion (123) towards the inner wall of the rotor core (20) ; Wherein, each rotor tooth (10) comprises an extension part (12) and a fixed part (11), and the installation slot (14) is formed between the extension parts (12) of two adjacent rotor teeth (10), the rotor core (20) is injection molded by a non-magnetic material, the fixed part (11) of the rotor tooth (10) is fixed to the rotor core (20) by injection molding, and the rotor core (20) partially protrudes into the installation slot (14) ; At least one fixing slot (111) is formed on the fixed part (11) of the rotor tooth (10), the slot wall of the fixing slot (111) comprises a side wall (1111) and an arc-shaped bottom wall (1112), the bottom wall (1112) is provided in a corrugated shape, and at least part of the rotor core (20) can be fused into the fixing slot (111) when the rotor core (20) and the fixed part (11) are injection connected and fixed; The fixed part (11) comprises a first body (113), a first protrusion (112) and a second protrusion (114), the first body (113) is provided with the first protrusion (112) and the second protrusion (114) on both sides along the circumferential direction of the rotor core (20), the first protrusion (112) and the second protrusion (114) on the same side are spaced apart, and the first protrusion (112), the second protrusion (114) and the first body (113) cooperatively form a fixing slot (111).

2. The machine rotor assembly of claim 1, wherein, The third protrusion (123) has a first inclined surface (1231), the side of the slot wedge (40) away from the rotor core (20) has a second inclined surface (41), and the first inclined surface (1231) abuts with the second inclined surface (41).

3. The machine rotor assembly of claim 2, wherein, A plurality of rotor teeth (10) are connected to form a rotor tooth group (101), and a flat plate circular end plate (50) is provided on both sides of the rotor tooth group (101) along the axial direction of the rotor core (20), and the rotor tooth group (101) is limited by the end plate (50). The traction machine rotor assembly further comprises a limiting piece (60), the limiting piece (60) comprises a through part (61) and a limiting part (62), the through part (61) is through the rotor tooth group (101) and the end plate (50), the limiting part (62) is located at both ends of the through part (61) to clamp and limit the end plate (50) and the rotor tooth group (101).

4. The machine rotor assembly of claim 1, wherein, The extension part (12) comprises a second body (121) and a third protrusion (123), one end of the second body (121) away from the fixed part (11) is provided with a third protrusion (123), the third protrusion (123), the second body (121) and the second protrusion (114) cooperate to form a mounting groove (14), and the permanent magnet (30) is embedded and fixed in the mounting groove (14).

5. The machine rotor assembly of claim 4, wherein, The first protrusion (112) and the second protrusion (114) both extend towards the direction away from the first body (113), the connecting line of the end of the first protrusion (112) and the end of the second protrusion (114) is a first connecting line (115), and the first connecting line (115) is parallel to the groove bottom of the mounting groove (14) extending along the radial direction of the rotor core (20).

6. The machine rotor assembly of claim 1, wherein, Along the axis direction of the rotor core (20), a plurality of rotor teeth (10) are arranged by a plurality of rotor laminations stacked with each other, at least one self riveting section (124) is formed on the extension part (12), the self riveting section (124) is provided with a self riveting groove and a self riveting protrusion, the self riveting protrusion can abut against the self riveting groove on the adjacent rotor lamination, so that the adjacent rotor laminations can be limited.

7. An elevator hoist machine characterized by, The elevator traction machine comprises a rotating shaft (70) penetrating the rotor assembly, an inner side wall of the rotor core (20) is provided with a key groove (21), an outer periphery of the rotating shaft (70) is provided with a connecting key matched with the key groove (21), and the rotor core (20) can drive the rotating shaft (70) to rotate through the connecting key.

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