Rotor assembly and motor

Abstract

The utility model relates to a rotor assembly and a motor. The rotor assembly comprises a rotating shaft structure; a rotor core; a first iron core end plate; a second iron core end plate; the rotor assembly further comprises a clamping ring, the clamping ring is provided with a notch in the circumferential direction, the rotating shaft structure is provided with a clamping groove and a flange at the installation positions of the first iron core end plate and the second iron core end plate respectively, the second iron core end plate abuts against the flange, the clamping ring is arranged on the rotating shaft structure in a sleeving mode and arranged in the clamping groove in the radial direction, and the clamping ring abuts against the first iron core end plate. A mounting groove is formed in one side, far away from the rotor iron core, of the first iron core end plate, the clamping ring is arranged in the mounting groove in the axial direction, and a maximum gap position and a minimum gap position are formed between the inner side of the mounting groove and the outer side of the clamping ring. When the clamping ring expands outwards, outward expansion of the clamping ring can be limited on the inner side of the minimum gap position through the mounting groove, so that the clamping ring is difficult to completely expand, and the clamping ring is prevented from falling off from the rotating shaft structure.

Description

Technical Field

[0001] The present application relates to the technical field of point motors, and particularly to a rotor assembly and a motor. Background Art

[0002] The rotor assembly is a rotating component rotatably arranged in the motor housing. It generally includes a rotating shaft, a rotor core and core end plates. The rotor core can be sleeved on the rotating shaft, and the core end plates can be axially arranged at both ends of the rotor core. One end of the rotating shaft can be provided with a limiting structure for abutting against one of the core end plates, and the other core end plate can abut against a snap ring. The snap ring is sleeved on the rotating shaft to lock and fix the rotor core and the two core end plates. However, since the rotor assembly is a rotating component and the snap ring has a notch, when the rotor assembly rotates at high speed, the frictional force between the snap ring and the core end plate is not sufficient to provide centripetal force to the snap ring, and there is a risk that the snap ring will fall off due to outward expansion. Utility Model Content

[0003] Based on this, the present application provides a rotor assembly and a motor to improve the problem that the snap ring falls off due to outward expansion when the rotor assembly rotates at high speed in the prior art.

[0004] In a first aspect, the present application provides a rotor assembly, which includes:

[0005] A rotating shaft structure;

[0006] A rotor core sleeved on the rotating shaft structure;

[0007] A first core end plate sleeved on the rotating shaft structure and abutting against one end of the rotor core;

[0008] A second core end plate sleeved on the rotating shaft structure and abutting against the other end of the rotor core;

[0009] Wherein, the rotor assembly further includes a snap ring. The snap ring is provided with a notch in the circumferential direction. The rotating shaft structure is respectively provided with a card slot and a flange at the installation positions of the first core end plate and the second core end plate. The second core end plate abuts against the flange. The snap ring is sleeved on the rotating shaft structure and is radially arranged in the card slot. The snap ring abuts against the first core end plate. An installation groove is provided on the side of the first core end plate away from the rotor core. The snap ring is axially arranged in the installation groove. There is a maximum clearance position and a minimum clearance position between the inner side of the installation groove and the outer side of the snap ring.

[0010] In one embodiment, a first end plate boss is provided between the maximum gap position and the minimum gap position on the first iron core end plate. The first end plate boss is arranged on the inner side of the mounting groove and extends from the maximum gap position to the minimum gap position. The gap between the inner side of the mounting groove and the outer side of the snap ring gradually decreases from the maximum gap position to the minimum gap position.

[0011] In one embodiment, the span of the maximum gap position in the circumferential direction of the mounting groove is not less than a semicircle.

[0012] In one embodiment, a second end plate boss is provided at the minimum gap position on the first iron core end plate. The second end plate boss is arranged on the inner side of the mounting groove and is arranged within the notch of the snap ring.

[0013] In one embodiment, a limiting groove is provided in the radial direction of the rotating shaft structure. A first convex tooth is provided on the inner side of the rotor iron core, a second convex tooth is provided on the inner side of the first iron core end plate, and a third convex tooth is provided on the inner side of the second iron core end plate. The first convex tooth, the second convex tooth, and the third convex tooth are all arranged within the limiting groove, so that the rotor iron core, the first iron core end plate, and the second iron core end plate all form rotational limits with the rotating shaft structure.

[0014] In one embodiment, the rotating shaft structure includes a rotating shaft body and a spoke. The spoke is connected to the rotating shaft body. The flange and the clamping groove are both arranged on the spoke. The rotor iron core, the first iron core end plate, the second iron core end plate, and the snap ring are all sleeved on the spoke.

[0015] In one embodiment, the rotating shaft structure further includes a locking nut. A shaft shoulder is provided at one end of the rotating shaft body. The spoke is sleeved on the rotating shaft body. One end of the spoke abuts against the shaft shoulder, and the other end is locked and fixed by the locking nut. The locking nut is threadedly connected to the rotating shaft body.

[0016] In one embodiment, the rotating shaft structure further includes a connection key. A first key groove is provided on the rotating shaft body, a second key groove is provided on the spoke, the second key groove is arranged opposite to the first key groove, and the connection key is arranged within the first key groove and the second key groove.

[0017] In one embodiment, a riveting portion is provided at one end of the locking nut away from the shaft shoulder. The riveting portion is used to rivet and fix the locking nut on the rotating shaft body.

[0018] In a second aspect, the present application provides a motor, and the motor includes any one of the rotor assemblies provided by the present application.

[0019] In the present application, an installation groove is provided on the first iron core end plate that abuts against the snap ring, and the snap ring is arranged in the installation groove. At the same time, the gap between the inner side of the installation groove and the outer side of the snap ring is set to a non-congruent structure including a maximum gap position and a minimum gap position. When the snap ring expands outward, the installation groove can limit the outward expansion of the snap ring on the inner side of the minimum gap position, so that it is difficult for the snap ring to fully open, thereby avoiding the snap ring falling off from the shaft structure and being unable to play the role of locking and fixing the rotor iron core, the first iron core end plate, and the second iron core end plate. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the rotor assembly provided in the first embodiment of the present application;

[0021] Figure 2 It is a cross-sectional view of the rotor assembly provided in the first embodiment of the present application;

[0022] Figure 3 It is an exploded view of the rotor assembly provided in the first embodiment of the present application;

[0023] Figure 4 It is an exploded view of the shaft body of the rotor assembly provided in the first embodiment of the present application.

[0024] Reference Numerals: 100, shaft structure; 110, flange; 120, limiting groove; 130, shaft body; 131, shaft shoulder; 132, first keyway; 133, groove; 140, spoke; 141, installation part; 142, connecting part; 143, second keyway; 150, locking nut; 151, riveting part; 160, connecting key; 200, rotor iron core; 210, first convex tooth; 300, first iron core end plate; 310, installation groove; 320, first end plate convex platform; 330, second end plate convex platform; 340, second convex tooth; 400, second iron core end plate; 410, third convex tooth; 500, snap ring; 510, notch; 600, card slot. Detailed Embodiments

[0025] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner.

[0027] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions for the implementation of the present utility model. Any modification of the structure, change in the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model.

[0028] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] Embodiment 1

[0030] Embodiment 1 of this application provides a rotor assembly, as Figures 1 to 4 shown, the rotor assembly includes:

[0031] A shaft structure 100;

[0032] A rotor core 200, which is sleeved on the shaft structure 100;

[0033] A first core end plate 300, which is sleeved on the shaft structure 100 and abuts against one end of the rotor core 200;

[0034] A second core end plate 400, which is sleeved on the shaft structure 100 and abuts against the other end of the rotor core 200;

[0035] Among them, the rotor assembly further includes a snap ring 500. The snap ring 500 is provided with a notch 510 along the circumferential direction. The shaft structure 100 is respectively provided with a card slot 600 and a flange 110 at the installation positions of the first core end plate 300 and the second core end plate 400. The second core end plate 400 abuts against the flange 110. The snap ring 500 is sleeved on the shaft structure 100 and is arranged in the card slot 600 along the radial direction. The snap ring 500 abuts against the first core end plate 300. An installation groove 310 is provided on the side of the first core end plate 300 away from the rotor core 200. The snap ring 500 is arranged in the installation groove 310 along the axial direction. There are a maximum clearance position and a minimum clearance position between the inner side of the installation groove 310 and the outer side of the snap ring 500.

[0036] As Figure 1 and Figure 2As shown, in this embodiment, by way of example, the rotating shaft structure 100 can be set in the shape of a rotating body, the clamping groove 600 and the flange 110 can be respectively arranged near both ends of the rotating shaft structure 100; along the radial direction of the rotating shaft structure 100, both the clamping groove 600 and the flange 110 are arranged on the outside of the rotating shaft structure 100. The rotor core 200 can be set in the shape of a hollow cylindrical structure, which can be formed by laminating a plurality of punching sheets. The first core end plate 300 and the second core end plate 400 can both be set in a ring shape, and their outer diameters can be equal to the outer diameter of the rotor core 200. The rotor core 200, the first core end plate 300 and the second core end plate 400 are all sleeved on the rotating shaft structure 100, and the first core end plate 300 and the second core end plate 400 respectively abut against both ends of the rotor core 200. Along the axial direction of the rotating shaft structure 100, the second core end plate 400 abuts against the flange 110 to form an axial limit; while the first core end plate 300 is locked and fixed by the snap ring 500 to prevent the rotor core 200, the first core end plate 300 and the second core end plate 400 from generating transmission on the rotating shaft structure 100.

[0037] As Figure 1 and Figure 2 shown, the snap ring 500 can be set as a ring with a notch 510; under the action of tension, the two ends of the snap ring 500 at its notch 510 can move away from each other, so that the snap ring 500 expands outward, and thus it is convenient to sleeved the snap ring 500 on the rotating shaft structure 100. When the tension disappears, the snap ring 500 can restore its inner diameter to be arranged in the clamping groove 600 along the radial direction. When clamping and fixing, the snap ring 500 abuts against the side of the first core end plate 300 away from the rotor core 200.

[0038] In this embodiment, an installation groove 310 is arranged on the side of the first core end plate 300 away from the rotor core 200. When the snap ring 500 is arranged in the clamping groove 600, it is also arranged in the installation groove 310 along the axial direction. A gap is maintained between the inner side of the installation groove 310 and the outer side of the snap ring 500 to facilitate clamping the snap ring 500 in the clamping groove 600. At the same time, the gaps between the inner side of the installation groove 310 and the outer side of the snap ring 500 are not congruent along the circumferential direction; in other words, there are a maximum gap position and a minimum gap position between the inner side of the installation groove 310 and the outer side of the snap ring 500. When the rotor assembly rotates at a high speed and causes the snap ring 500 to expand outward, the outer side of the snap ring 500 abuts against the inner side of the installation groove 310 at the minimum gap position. At this time, the snap ring 500 is difficult to fully open due to the influence of the minimum gap position, and thus the snap ring 500 is limited and not easily detached.

[0039] It can be understood that in the present application, by providing an installation groove 310 on the first iron core end plate 300 that abuts against the snap ring 500, arranging the snap ring 500 in the installation groove 310, and setting the gap between the inner side of the installation groove 310 and the outer side of the snap ring 500 as a non-congruent structure including a maximum gap position and a minimum gap position, it is possible to limit the outward expansion of the snap ring 500 through the inner side of the minimum gap position of the installation groove 310 when the snap ring 500 expands outward, so that the snap ring 500 is difficult to fully open, thereby avoiding the snap ring 500 falling off the rotating shaft structure 100 and failing to play the role of locking and fixing the rotor iron core 200, the first iron core end plate 300, and the second iron core end plate 400.

[0040] Specifically, a first end plate boss 320 is provided between the maximum gap position and the minimum gap position on the first iron core end plate 300. The first end plate boss 320 is provided on the inner side of the installation groove 310 and extends from the maximum gap position to the minimum gap position. The gap between the inner side of the installation groove 310 and the outer side of the snap ring 500 gradually decreases from the maximum gap position to the minimum gap position.

[0041] As Figure 1 shown, in this embodiment, by way of example, the first end plate boss 320 can be formed by extending along the direction close to the axis of the first iron core end plate 300 from the inner side of the installation groove 310, and it can be integrally formed with the first iron core end plate 300. The first end plate boss 320 can be provided between the maximum gap position and the minimum position, and the gap between the inner side of the installation groove 310 and the outer side of the snap ring 500 can gradually decrease from the maximum gap position to the minimum gap position; that is, the inner diameter of the installation groove 310 gradually decreases when extending from the maximum gap position to the minimum gap position, and its overall setting is tapered. Along this direction, the first end plate boss 320 gradually approaches the axis of the first iron core end plate 300 and the width gradually increases. When the snap ring 500 expands outward, its outer side abuts against the first end plate boss 320. Due to the gradually changing shape of the first end plate boss 320, there is a large contact area between the outer side of the snap ring 500 and the first end plate boss 320.

[0042] It can be understood that in this embodiment, by providing the first end plate boss 320 on the inner side of the installation groove 310 and reasonably setting the shape of the first end plate boss 320, the snap ring 500 can be uniformly stressed when being limited by the first end plate boss 320, thereby ensuring the limiting effect of the first end plate boss 320 on the outward expansion of the snap ring 500.

[0043] More specifically, the span of the maximum gap position in the circumferential direction of the installation groove 310 is not less than one-half of a circle.

[0044] As Figure 1As shown, in this embodiment, by way of example, the maximum clearance position and the minimum clearance position between the inner side of the mounting groove 310 and the outer side of the snap ring 500 can be arranged in a certain arc shape circumferentially, rather than referring to a specific point on the circumference of the mounting groove 310. The span corresponding to the maximum clearance position in the circumferential direction of the mounting groove 310 can be not less than half a circle, that is, there is at least a region corresponding to half a circle where the first end plate boss 320 is not provided between the inner side of the mounting groove 310 and the outer side of the snap ring 500. When the snap ring 500 is assembled into the card slot 600, after the snap ring 500 is opened, it can be fed into the card slot 600 from the maximum clearance position and sleeved on the rotating shaft structure 100.

[0045] It can be understood that in this embodiment, by reasonably setting the span of the maximum clearance position between the inner side of the mounting groove 310 and the outer side of the snap ring 500, while ensuring the convenience of assembling the snap ring 500, the first end plate boss 320 can play a better limiting effect.

[0046] Specifically, the second end plate boss 330 is provided at the minimum clearance position of the first iron core end plate 300. The second end plate boss 330 is provided on the inner side of the mounting groove 310 and is arranged within the notch 510 of the snap ring 500.

[0047] As Figure 1 shown, in this embodiment, by way of example, similarly, the second end plate boss 330 can also be formed by the inner side of the mounting groove 310 extending along the direction close to the axis of the first iron core end plate 300. The second end plate boss 330 can be integrally formed with both the first iron core end plate 300 and the first end plate boss 320. The second end plate boss 330 can be set as an arc-shaped protrusion; when the snap ring 500 is arranged in the mounting groove 310, the second end plate boss 330 is at least arranged within the notch 510 of the snap ring 500. When the rotor assembly rotates at high speed, the second end plate boss 330 can also perform circumferential limiting on the snap ring 500 to prevent the snap ring 500 from rotating self.

[0048] It can be understood that in this embodiment, by providing the second end plate boss 330 within the notch 510 of the snap ring 500, it is possible to prevent the snap ring 500 from rotating self during the high-speed operation of the rotor assembly, thereby affecting the effect of the snap ring 500 locking and fixing the rotor iron core 200, the first iron core end plate 300, and the second iron core end plate 400.

[0049] Specifically, the rotating shaft structure 100 is provided with a limiting groove 120 in the radial direction. A first convex tooth 210 is provided on the inner side of the rotor core 200, a second convex tooth 340 is provided on the inner side of the first iron core end plate 300, and a third convex tooth 410 is provided on the inner side of the second iron core end plate 400. The first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 are all arranged in the limiting groove 120, so that the rotor core 200, the first iron core end plate 300, and the second iron core end plate 400 all form rotational limits with the rotating shaft structure 100.

[0050] As Figure 2 and Figure 3 shown, in this embodiment, by way of example, the limiting groove 120 is arranged in the radial direction of the rotating shaft structure 100 and can penetrate axially through both ends of the rotating shaft structure 100 along the axis of the rotating shaft structure 100, and it can be set as a rectangular groove. There can be two limiting grooves 120, and the two limiting grooves 120 can be symmetrically arranged along the axis of the rotating shaft structure 100. The inner sides of the rotor core 200, the first iron core end plate 300, and the second iron core end plate 400 can be respectively provided with a first convex tooth 210, a second convex tooth 340, and a third convex tooth 410 at the same position. The first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 can be integrally formed with the rotor core 200, the first iron core end plate 300, and the second iron core end plate 400 respectively; for the rotor core 200, its first convex tooth 210 is formed by laminating a specified structure on its punching sheet. The first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 respectively correspond to the limiting groove 120 one by one, and their shapes are all adapted to the shape of the limiting groove 120. The first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 are arranged in the limiting groove 120, so that the rotor core 200, the first iron core end plate 300, and the second iron core end plate 400 can rotate synchronously with the rotating shaft structure 100.

[0051] It can be understood that in this embodiment, by providing the limiting groove 120 on the rotating shaft structure 100 and respectively providing the first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 on the inner sides of the rotor core 200, the first iron core end plate 300, and the second iron core end plate 400, the cooperation between the first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 and the limiting groove 120 can prevent relative rotation between the rotor core 200, the first iron core end plate 300, the second iron core end plate 400 and the rotating shaft structure 100, thereby improving the structural stability of the rotor assembly.

[0052] Specifically, the rotating shaft structure 100 includes a rotating shaft body 130 and a spoke 140. The spoke 140 is connected to the rotating shaft body 130. The flange 110 and the clamping groove 600 are both arranged on the spoke 140. The rotor core 200, the first iron core end plate 300, the second iron core end plate 400, and the snap ring 500 are all sleeved on the spoke 140.

[0053] As Figure 2 and Figure 4 shown, in this embodiment, by way of example, the rotating shaft body 130 may be configured as a columnar structure, and its length is the total length of the rotor assembly. The spoke 140 may include a mounting portion 141 and a connecting portion 142. The mounting portion 141 may be configured as a tubular structure, and the connecting portion 142 may be configured as a disc-shaped structure. The mounting portion 141 is coaxially arranged with the rotating shaft body 130, and the connecting portion 142 is arranged in the cross-section of the mounting portion 141 and the rotating shaft body 130 and connects the mounting portion 141 and the rotating shaft body 130; the connecting portion 142 is located in the middle of the rotating shaft body 130 and the mounting portion 141, and weight-reducing holes may be provided on the connecting portion 142 to reduce the weight of the rotor assembly. The flange 110 may be arranged on the outer side of the mounting portion 141 and may be arranged at one end of the mounting portion 141; the clamping groove 600 may also be arranged on the outer side of the mounting portion 141 and may be arranged at the other end of the mounting portion 141. The rotor core 200, the first core end plate 300, the second core end plate 400, and the snap ring 500 may all be sleeved on the mounting portion 141; and the limiting groove 120 may also be opened on the mounting portion 141, and it may penetrate the mounting portion 141 along the axial direction.

[0054] Of course, in some embodiments, the rotating shaft structure 100 may also only include the rotating shaft body 130 without the spoke 140. At this time, the rotor core 200, the first core end plate 300, the second core end plate 400, and the snap ring 500 may all be directly sleeved on the rotating shaft body 130. Correspondingly, the flange 110 forms a shoulder 131 on the rotating shaft body 130, and the snap ring 500 is sleeved on the rotating shaft body 130.

[0055] More specifically, the rotating shaft structure 100 further includes a locking nut 150. One end of the rotating shaft body 130 is provided with a shoulder 131. The spoke 140 is sleeved on the rotating shaft body 130. One end of the spoke 140 abuts against the shoulder 131, and the other end is locked and fixed by the locking nut 150. The locking nut 150 is threadedly connected to the rotating shaft body 130.

[0056] As Figure 2 and Figure 4 shown, in this embodiment, by way of example, the rotating shaft structure 100 may be configured as a split structure, that is, the spoke 140 and the rotating shaft body 130 are split components. The spoke 140 is sleeved on the rotating shaft body 130 and is locked and fixed by the locking nut 150. The locking nut 150 is threadedly connected to the rotating shaft body 130. At this time, a shoulder 131 is provided on the rotating shaft body 130, and the shoulder 131 may be integrally formed with the rotating shaft body 130. When the spoke 140 is installed in place, one end thereof abuts against the shoulder 131; and when the locking nut 150 locks and fixes it, it abuts against the other end thereof.

[0057] It can be understood that in this embodiment, by setting the rotating shaft body 130 as a split rotating shaft body 130 and a spoke 140, and locking and fixing the spoke 140 through a locking nut 150, the rotating shaft body 130 and the spoke 140 can be prepared separately to avoid the problems of large difficulty and large machining allowance during the integral forging of the rotating shaft structure 100.

[0058] More specifically, the rotating shaft structure 100 further includes a connection key 160. A first keyway 132 is provided on the rotating shaft body 130, and a second keyway 143 is provided on the spoke 140. The second keyway 143 is disposed opposite to the first keyway 132, and the connection key 160 is disposed in the first keyway 132 and the second keyway 143.

[0059] As Figure 2 and Figure 4 shown, in this embodiment, by way of example, the connection key 160 can be set as a flat key, which is in the shape of a cuboid. The first keyway 132 can be provided on the outer side of the rotating shaft body 130 and can be arranged along the radial direction of the rotating shaft body 130. The second keyway 143 can be provided on the inner side of the connecting portion 142 and is also arranged along the radial direction of the rotating shaft body 130; at the same time, the second keyway 143 penetrates through the connecting portion 142 along the axial direction. The second keyway 143 is disposed opposite to the first keyway 132 and encloses a chamber for arranging the connection key 160. During assembly, the connection key 160 can be first placed in the first keyway 132, and then the spoke 140 is sleeved on the rotating shaft body 130; when sleeving, the connection key 160 is aligned with the second keyway 143, and the connection key 160 is slid into the second keyway 143, and then the spoke 140 is abutted against the shaft shoulder 131.

[0060] It can be understood that in this embodiment, by setting the connection key 160 and respectively providing the first keyway 132 and the second keyway 143 for arranging the connection key 160 on the rotating shaft body 130 and the spoke 140, when the spoke 140 is sleeved on the rotating shaft body 130, rotational limitation is formed between the spoke 140 and the rotating shaft body 130, so that the spoke 140 and the rotating shaft body 130 can rotate relative to each other.

[0061] More specifically, a riveting portion 151 is provided at one end of the locking nut 150 away from the shaft shoulder 131, and the riveting portion 151 is used for riveting and fixing the locking nut 150 on the rotating shaft body 130.

[0062] As Figure 2 and Figure 4As shown, in this embodiment, by way of example, the riveting portion 151 can be integrally formed with the lock nut 150. It can be provided at one end of the lock nut 150 away from the shaft shoulder 131 and can be provided inside the lock nut 150. When the lock nut 150 locks and fixes the spoke 140, the riveting portion 151 can be riveted so that the riveting portion 151 deforms to rivet and fix the lock nut 150 on the rotating shaft body 130. A groove 133 can be provided on the rotating shaft body 130. The groove 133 can be provided along the radial direction of the rotating shaft body 130 and is at least provided at the position corresponding to the riveting portion 151. When the riveting portion 151 deforms, it is clamped in the groove 133. Two grooves 133 can be symmetrically provided along the axis of the rotating shaft body 130, and the riveting portion 151 is riveted and deformed at the positions of the two grooves 133.

[0063] It can be understood that in this embodiment, by providing the riveting portion 151 for riveting on the lock nut 150, it is possible to prevent the lock nut 150 from rotating reversely during locking and fixing, which affects the effect of locking and fixing the spoke 140.

[0064] The implementation principle of a rotor assembly provided in Embodiment 1 of the present application is as follows:

[0065] During assembly, first place the connecting key 160 in the first keyway 132, and then sleeved the spoke 140 on the rotating shaft body 130. When sleeving, align the connecting key 160 with the second keyway 143 and make the connecting key 160 slide into the second keyway 143. Then abut the spoke 140 against the shaft shoulder 131, and then threadedly connect the lock nut 150 with the rotating shaft body 130 so that the lock nut 150 locks and fixes the spoke 140 on the rotating shaft body 130. Then sequentially sleeve the second iron core end plate 400, the rotor iron core 200, and the first iron core end plate 300 on the spoke 140, and make the second iron core end plate 400 abut against the flange 110. When sleeving, arrange the first convex tooth 210, the second convex tooth 340, and the third convex tooth 410 in the limiting groove 120. Then open the snap ring 500 so that the two ends at the notch 510 are separated from each other, so that the snap ring 500 can be sleeved on the spoke 140 and can be clamped in the clamping groove 600. When the snap ring 500 is clamped in place, release the snap ring 500 so that the snap ring 500 abuts against the first iron core end plate 300, and make the snap ring 500 arranged in the installation groove 310, and at the same time make the second end plate boss 330 arranged in the notch 510.

[0066] Embodiment 2

[0067] Embodiment 2 of the present application provides a motor, and the motor includes any rotor assembly provided by the present application.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0069] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A rotor assembly, characterized in that: The rotor assembly comprises: A rotating shaft structure (100); A rotor core (200) sleeved on the rotating shaft structure (100); A first iron core end plate (300) which is sleeved on the rotating shaft structure (100) and abuts against one end of the rotor iron core (200); A second iron core end plate (400) is sleeved on the rotating shaft structure (100) and abuts against the other end of the rotor iron core (200); The rotor assembly further comprises a retaining ring (500), the retaining ring (500) being provided with a notch (510) along the circumferential direction, the rotating shaft structure (100) being provided with a retaining groove (600) and a flange (110) at the installation positions of the first iron core end plate (300) and the second iron core end plate (400), respectively, the second iron core end plate (400) being abutted against the flange (110), and the retaining ring (500) being sleeved on the rotating shaft structure (100). The retaining ring (500) is disposed on the rotor core (200) and is radially arranged in the retaining groove (600). The retaining ring (500) is in contact with the first core end plate (300). A mounting groove (310) is provided on the side of the first core end plate (300) away from the rotor core (200). The retaining ring (500) is axially arranged in the mounting groove (310). A maximum gap position and a minimum gap position are provided between the inner side of the mounting groove (310) and the outer side of the retaining ring (500).

2. The rotor assembly according to claim 1, characterized in that: The first core end plate (300) is provided with a first end plate boss (320) between the maximum gap position and the minimum gap position, and the first end plate boss (320) is provided on the inner side of the mounting groove (310). The first end plate boss (320) extends from the maximum gap position to the minimum gap position, and the gap between the inner side of the mounting groove (310) and the outer side of the retaining ring (500) gradually decreases from the maximum gap position to the minimum gap position.

3. The rotor assembly according to claim 2, characterized in that: The span of the maximum gap position in the circumferential direction of the installation groove (310) is not less than half a circle.

4. The rotor assembly according to claim 1, characterized in that: The first core end plate (300) is provided with a second end plate boss (330) at the minimum gap position, and the second end plate boss (330) is arranged on the inner side of the mounting groove (310) and in the notch (510) of the retaining ring (500).

5. The rotor assembly according to claim 1, characterized in that: The rotating shaft structure (100) is provided with a limiting groove (120) in the radial direction, the inner side of the rotor core (200) is provided with a first protruding tooth (210), the inner side of the first core end plate (300) is provided with a second protruding tooth (340), and the inner side of the second core end plate (400) is provided with a third protruding tooth (410), and the first protruding tooth (210), the second protruding tooth (340) and the third protruding tooth (410) are all arranged in the limiting groove (120), so that the rotor core (200), the first core end plate (300) and the second core end plate (400) are all provided with a rotation limit with the rotating shaft structure (100).

6. The rotor assembly according to claim 1, characterized in that: The rotating shaft structure (100) comprises a rotating shaft body (130) and a spoke (140), wherein the spoke (140) is connected to the rotating shaft body (130), the flange (110) and the clamping groove (600) are both arranged on the spoke (140), and the rotor core (200), the first core end plate (300), the second core end plate (400) and the clamping ring (500) are all sleeved on the spoke (140).

7. The rotor assembly according to claim 6, characterized in that: The rotating shaft structure (100) further comprises a locking nut (150); one end of the rotating shaft body (130) is provided with a shaft shoulder (131); the spoke (140) is sleeved on the rotating shaft body (130); one end of the spoke (140) is in contact with the shaft shoulder (131); the other end of the spoke (140) is locked and fixed by the locking nut (150); and the locking nut (150) is threadedly connected to the rotating shaft body (130).

8. The rotor assembly according to claim 7, characterized in that: The rotating shaft structure (100) further comprises a connecting key (160), the rotating shaft body (130) is provided with a first keyway (132), the spoke (140) is provided with a second keyway (143), the second keyway (143) is arranged opposite to the first keyway (132), and the connecting key (160) is arranged in the first keyway (132) and the second keyway (143).

9. The rotor assembly according to claim 7, characterized in that: A riveting portion (151) is provided at one end of the locking nut (150) away from the shaft shoulder (131), and the riveting portion (151) is used to rivet and fix the locking nut (150) on the rotating shaft body (130).

10. A motor, characterized in that: The electric motor comprises a rotor assembly as claimed in any one of claims 1 to 9.

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