Stator assembly, electric machine and vehicle

Abstract

The utility model discloses a kind of stator assembly, motor and vehicle, including stator ring and multiple stator teeth, the stator ring is equipped with multiple assembly grooves, multiple The assembly groove is arranged at the outer circumferential side of the stator ring and along the circumferential direction of the stator ring interval, the assembly groove includes groove bottom wall, the groove bottom wall is equipped with push part, the stator tooth is equipped with assembly part, the assembly part of multiple The stator tooth is respectively matched in multiple assembly groove, the assembly part includes with the action surface of the groove bottom wall opposite arrangement, the push part props in the groove bottom wall With the action surface between to make the assembly part inner expansion lock in the assembly groove. The stator assembly of the utility model is good in the assembly stability of stator ring and stator tooth, avoid the condition that stator tooth is easy to loosen in prior art, and further also avoid the problem that the motor is operated with big noise, low efficiency due to loosening.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a stator assembly, a motor, and a vehicle. Background Technology

[0002] Currently, hub motors are widely used in personal mobility vehicles such as two-wheeled electric vehicles and electric bicycles. To avoid problems such as high iron loss, low efficiency, and high temperature in existing hub motors, some hub motors in related technologies have adopted a split stator design, where the stator teeth and stator ring are independent components. During processing, the stator teeth need to be embedded into the corresponding assembly slots of the stator ring. However, this structure has problems such as poor assembly stability and easy loosening in actual use, which is not conducive to the stable operation of hub motors. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, this utility model embodiment proposes a stator assembly with good assembly stability of stator rings and stator teeth, avoiding the situation where stator teeth are easy to loosen in the prior art, and thus also avoiding the problems of high motor operating noise and low efficiency caused by loosening.

[0005] This utility model embodiment also proposes a motor including the above-described stator assembly.

[0006] This utility model embodiment also proposes a vehicle including the above-described motor.

[0007] The stator assembly of this utility model embodiment includes:

[0008] A stator ring, wherein the stator ring is provided with a plurality of assembly slots, the plurality of assembly slots being provided on the outer periphery of the stator ring and arranged at intervals along the circumference of the stator ring, the assembly slot including a bottom wall, the bottom wall of the slot being provided with a pushing part;

[0009] Multiple stator teeth are provided with assembly parts. The assembly parts of the multiple stator teeth are respectively engaged in multiple assembly slots. Each assembly part includes an action surface arranged opposite to the bottom wall of the slot. The pushing part supports between the bottom wall of the slot and the action surface to lock the assembly part in the assembly slot.

[0010] In some embodiments, the mounting groove includes a first groove wall and a second groove wall arranged opposite to each other in the circumferential direction of the stator ring, and the mounting part includes a first side wall and a second side wall arranged opposite to each other. When the mounting part is mounted on the mounting groove, at least one of the first groove wall and the second groove wall abuts against at least one of the first side wall and the second side wall.

[0011] In some embodiments, the groove opening of the assembly groove is located on the outer peripheral wall of the stator ring and is arranged opposite to the bottom wall of the groove. The distance between the first groove wall and the second groove wall gradually decreases along the direction from the bottom wall of the groove to the groove opening, and the distance between the first side wall and the second side wall gradually decreases along the direction away from the working surface.

[0012] In some embodiments, the included angles formed by the first groove wall and the second groove wall with the bottom wall of the groove are both acute angles, and the first groove wall and the first side wall are fitted together to abut against each other, and the second groove wall and the second side wall are fitted together to abut against each other.

[0013] In some embodiments, the first tank wall and the bottom wall of the tank form an angle a1, and the second tank wall and the bottom wall of the tank form an angle a2, wherein the angles a1 and a2 are the same.

[0014] The first sidewall and the working surface form an angle b1, and the second sidewall and the working surface form an angle b2, wherein the angles b1 and b2 are the same.

[0015] In some embodiments, the working surface is a plane;

[0016] And / or, the mounting groove extends through the stator ring along its axial direction.

[0017] In some embodiments, the pusher portion is integrally formed on the stator ring, and a portion of the pusher portion extends and bends along the axial direction of the stator ring to fit against the action surface for abutment.

[0018] In some embodiments, the bottom wall of the groove is provided with a protrusion that protrudes from the bottom wall of the groove, and the protrusion is used to abut against the working surface to limit the upper limit of the extrusion deformation of the pushing part;

[0019] And / or, there are multiple pushers, and the multiple pushers are arranged at circumferential intervals along the stator ring.

[0020] The motor of this utility model embodiment includes the stator assembly as described in any of the above embodiments.

[0021] The vehicle of this utility model embodiment includes the motor as described in any of the above embodiments.

[0022] Beneficial effects: The stator assembly, motor and vehicle of this utility model embodiment have good assembly stability of stator ring and stator teeth, avoiding the situation of stator teeth being easy to loosen in the prior art, and thus avoiding the problems of high operating noise and low efficiency of motor caused by loosening. Attached Figure Description

[0023] Figure 1 This is an exploded view of a single stator tooth of the stator assembly according to an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0025] Figure 3 This is a schematic diagram of the stator teeth in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the stator teeth according to another embodiment of the present invention.

[0027] Figure 5 yes Figure 4 A magnified view of a portion of point B in the middle.

[0028] Figure 6 This is a simplified assembly diagram of the stator ring and stator teeth of the stator assembly according to an embodiment of the present invention.

[0029] Figure 7 yes Figure 6 A magnified view of a portion of point C.

[0030] Figure label:

[0031] 1-Stator ring; 11-Assembly groove; 111-Groove bottom wall; 112-Pushing part; 113-First groove wall; 114-Second groove wall; 115-Protrusion;

[0032] 2-Stator tooth; 21-Assembly part; 211-Action surface; 212-First sidewall; 213-Second sidewall. Detailed Implementation

[0033] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0034] like Figure 1 As shown, the stator assembly of this utility model embodiment includes a stator ring 1 and a plurality of stator teeth 2.

[0035] The stator ring 1 is provided with a plurality of assembly slots 11. The plurality of assembly slots 11 are located on the outer periphery of the stator ring 1 and are arranged at intervals along the circumference of the stator ring 1. The assembly slot 11 includes a bottom wall 111 and a pushing part 112 is provided on the bottom wall 111.

[0036] For example, such as Figure 1As shown, the stator ring 1 can be generally circular, and the assembly groove 11 can be provided on the outer peripheral wall of the stator ring 1. Multiple assembly grooves 11 can be arranged at equal intervals along the circumference of the stator ring 1.

[0037] like Figure 2 As shown, each assembly slot 11 includes a slot bottom wall 111 arranged radially opposite to the slot opening of the assembly slot 11 in the stator ring 1. The slot bottom wall 111 can be a planar structure. Each slot bottom wall 111 can be provided with a pushing part 112. The pushing part 112 can be integrally formed and arranged on the slot bottom wall 111. In some other embodiments, the pushing part 112 can also be fixed to the slot bottom wall 111 by welding, bonding or other methods.

[0038] The stator teeth 2 are provided with an assembly part 21. The assembly parts 21 of the multiple stator teeth 2 are respectively fitted into multiple assembly slots 11. The assembly part 21 includes a working surface 211 arranged opposite to the bottom wall 111 of the slot. The pushing part 112 is supported between the bottom wall 111 of the slot and the working surface 211 so that the assembly part 21 is internally locked in the assembly slot 11.

[0039] It should be noted that, as Figure 3 As shown, two pushing parts 112 can be provided on the bottom wall 111 of the slot. The two pushing parts 112 can be arranged at intervals in the circumferential direction of the stator ring 1. In some other embodiments, three, four, five, or other numbers of pushing parts 112 can also be provided on the bottom wall 111 of the slot. In other embodiments, such as Figure 2 As shown, the bottom wall 111 of the groove may also have only one pusher 112.

[0040] For example, such as Figure 4 As shown, the stator teeth 2 can extend along the inner and outer directions, which can also be the radial direction of the stator ring 1. The assembly part 21 of each stator tooth 2 can be integrally formed on the inner side of the stator tooth 2. Each assembly part 21 can have a working surface 211, which can be a plane. In some other embodiments, the working surface 211 can also be an arc surface, a sawtooth surface, etc., with a certain curvature or arc.

[0041] During assembly, the assembly part 21 of each stator tooth 2 can be inserted into the corresponding assembly groove 11. The working surface 211 of the assembly part 21 of each stator tooth 2 can be arranged directly opposite the bottom wall 111 of the groove in the inward and outward directions. The pushing part 112 can be clamped between the bottom wall 111 of the groove and the working surface 211. The pushing part 112 itself can have a certain elastic deformation performance. Due to the squeezing action of the bottom wall 111 of the groove and the working surface 211, the pushing part 112 will deform and support between the stator ring 1 and the stator tooth 2. Through the supporting force applied by the pushing part 112, the assembly part 21 can fit against the groove wall of the assembly groove 11, thereby enhancing the friction between the assembly part 21 and the assembly groove 11, and thus ensuring the structural stability of the assembly of the stator tooth 2 and the stator ring 1.

[0042] In this embodiment of the stator assembly, the stator tooth 2 assembly part 21 can be tightly fitted with the groove wall of the assembly groove 11 by the supporting action of the pushing part 112. The force applied by the pushing part 112 can suppress the movement of the stator tooth 2 along the radial direction, while the friction between the assembly part 21 and the groove wall of the assembly groove 11 can suppress the movement of the stator tooth 2 along the axial direction. This improves the assembly stability of the stator ring 1 and the stator tooth 2 of the stator assembly, avoids the situation where the stator tooth 2 is easy to loosen in the prior art, and also avoids the problems of high motor noise and low efficiency caused by loosening.

[0043] In some embodiments, the assembly groove 11 includes a first groove wall 113 and a second groove wall 114 arranged opposite to each other in the circumferential direction of the stator ring 1, and the assembly part 21 includes a first side wall 212 and a second side wall 213 arranged opposite to each other. When the assembly part 21 is assembled into the assembly groove 11, at least one of the first groove wall 113 and the second groove wall 114 is in a stop-fitting engagement with at least one of the first side wall 212 and the second side wall 213.

[0044] For example, such as Figure 2 As shown, both the first groove wall 113 and the second groove wall 114 can be planar, such as... Figure 4 As shown, both the first sidewall 212 and the second sidewall 213 can be planar. When the assembly part 21 is embedded in the assembly groove 11, the first groove wall 113 can fit against the first sidewall 212 and the second groove wall 114 can fit against the second sidewall 213. The combined force exerted by the two groove walls and the two sidewalls can form an action and reaction force with the force exerted by the push part 112, thereby further ensuring the structural stability of the stator teeth 2 and stator ring 1 assembly.

[0045] In some other embodiments, only the first groove wall 113 and the first side wall 212 may be in contact for abutment, while the second groove wall 114 and the second side wall 213 may only be in contact, and the two may not exert a large force on each other. For example, when the first groove wall 113 and the second groove wall 114 have the same inclination direction.

[0046] In some embodiments, the groove opening of the assembly groove 11 is located on the outer peripheral wall of the stator ring 1 and is arranged opposite to the groove bottom wall 111. The distance between the first groove wall 113 and the second groove wall 114 gradually decreases along the direction from the groove bottom wall 111 to the groove opening, and the distance between the first side wall 212 and the second side wall 213 gradually decreases along the direction away from the working surface 211.

[0047] For example, such as Figure 2 As shown, the direction from the bottom wall 111 of the groove to the groove opening can be the direction from the inside to the outside of the stator ring 1. Both the first groove wall 113 and the second groove wall 114 can be arranged at an angle, and the angles of the first groove wall 113 and the second groove wall 114 can be opposite, that is, the distance between the first groove wall 113 and the second groove wall 114 can gradually decrease along the direction from the inside to the outside. Thus, the assembly groove 11 as a whole can be a constricted structure.

[0048] like Figure 4 and Figure 5 As shown, both the first sidewall 212 and the second sidewall 213 can be arranged at an angle, and the angles of the first sidewall 212 and the second sidewall 213 can be opposite. That is, the distance between the first sidewall 212 and the second sidewall 213 can gradually decrease from the inside to the outside, so that the overall shape of the assembly part 21 can be adapted to the shape of the assembly groove 11. The above design can prevent the assembly part 21 from coming out of the groove opening of the assembly groove 11, ensuring the structural stability of the assembly.

[0049] In some embodiments, the included angles formed by the first groove wall 113 and the second groove wall 114 and the bottom wall 111 are both acute angles, and the first groove wall 113 and the first side wall 212 are fitted together to abut against each other, and the second groove wall 114 and the second side wall 213 are fitted together to abut against each other.

[0050] For example, such as Figure 2 As shown, the included angle formed by the first groove wall 113 and the groove bottom wall 111 can be angle α1, and the included angle formed by the second groove wall 114 and the groove bottom wall 111 can be angle α2. Both angles α1 and α2 can be acute angles. This makes the first groove wall 113 and the second groove wall 114 generally arranged in a V-shape. When the assembly part 21 is inserted into the assembly groove 11, the first groove wall 113 and the first side wall 212 will abut against each other, and the second groove wall 114 and the second side wall 213 will abut against each other.

[0051] In some embodiments, such as Figure 2As shown, the first tank wall 113 and the bottom wall 111 form an angle α1, and the second tank wall 114 and the bottom wall 111 form an angle α2. Angles α1 and α2 are the same. Figure 5 As shown, the first sidewall 212 and the working surface 211 form an angle b1, and the second sidewall 213 and the working surface 211 form an angle b2. The angles b1 and b2 are the same.

[0052] Therefore, both the assembly groove 11 and the assembly part 21 are generally isosceles triangles, that is, both the assembly groove 11 and the assembly part 21 are symmetrical structures. When the assembly part 21 is assembled into the assembly groove 11, the first groove wall 113 and the second groove wall 114, respectively, and the first side wall 212 and the second side wall 213, respectively, can make the assembly part 21 move closer to the central axis of the assembly groove 11, thereby ensuring the assembly accuracy of the stator teeth 2 and the stator ring 1.

[0053] In some embodiments, such as Figure 1 As shown, each mounting slot 11 can penetrate the stator ring 1 along the axial direction. This allows the mounting part 21 to be mounted axially into the corresponding mounting slot 11, facilitating the installation and fixing of the stator teeth 2 and the stator ring 1.

[0054] In some embodiments, the push portion 112 is integrally formed on the stator ring 1, and a portion of the push portion 112 extends and bends along the axial direction of the stator ring 1 to conform to and stop the action surface 211.

[0055] like Figure 6 As shown, the stator ring 1 can be annular, and the assembly grooves 11 can be provided on the outer periphery of the stator ring 1 and arranged at equal intervals along the circumference of the stator ring 1. Each assembly groove 11 can have a pusher portion 112 integrally formed therein. Figure 7 As shown, the pusher portion 112 can be a sheet-like structure. The pusher portion 112 can be formed by bending. After bending, a portion of the pusher portion 112 can extend along the axial direction of the stator ring 1, and this portion of the pusher portion 112 can be spaced apart from the bottom wall 111 of the groove.

[0056] Therefore, on the one hand, it facilitates the processing and forming of the jacking part 112 and ensures the structural strength of the connection between the jacking part 112 and the stator ring 1. On the other hand, it also enables the jacking part 112 to have a certain elastic deformation performance, which fully meets the usage requirements of supporting the bottom wall 111 of the groove and the assembly part 21.

[0057] In some embodiments, the bottom wall 111 of the groove is provided with a protrusion 115, which protrudes from the bottom wall 111 of the groove and is used to abut against the action surface 211 to limit the upper limit of the amount of extrusion deformation of the pushing part 112.

[0058] For example, such as Figure 7 As shown, the protrusion 115 can be a protrusion structure, and the protrusion 115 can be integrally formed on the bottom wall 111 of the groove. The protrusion 115 can be located beside the aforementioned pushing part 112. During assembly, the protrusion 115 can fit against the working surface 211 of the assembly part 21. Since the protrusion 115 can be regarded as a rigid structure, the working surface 211 will not excessively approach the bottom wall 111 of the groove, thus avoiding the situation where the working surface 211 excessively squeezes the pushing part 112, and avoiding the situation where the pushing part 112 is easily deformed and loses its elasticity. This ensures that the pushing part 112 always has a good elastic effect, thereby ensuring the supporting effect.

[0059] In some embodiments, there are multiple pushers 112, and the multiple pushers 112 are arranged at circumferential intervals along the stator ring 1. For example, as Figure 7 As shown, two jacking portions 112 can be provided, and the two jacking portions 112 can be arranged at intervals in the circumferential direction of the stator ring 1. The aforementioned protrusion 115 can be located between the two jacking portions 112. This fully ensures the overall elastic supporting effect.

[0060] The motor of an embodiment of this utility model is described below.

[0061] The motor of this embodiment includes a stator assembly as described in any of the above embodiments. The stator assembly can be the stator assembly described in any of the above embodiments. The motor may also include a rotor assembly, which can be fitted within the stator assembly.

[0062] The vehicle according to an embodiment of the present invention is described below.

[0063] The vehicle in this embodiment of the invention includes a motor, which can be the motor described in any of the above embodiments. The vehicle can be a two-wheeled electric vehicle, a three-wheeled electric vehicle, or any other vehicle that requires the installation of a motor.

[0064] In the description of this utility model, it should be understood that 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0066] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0067] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0068] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0069] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A stator assembly, characterized in that, include: A stator ring, wherein the stator ring is provided with a plurality of assembly slots, the plurality of assembly slots being provided on the outer periphery of the stator ring and arranged at intervals along the circumference of the stator ring, the assembly slot including a bottom wall, the bottom wall of the slot being provided with a pushing part; Multiple stator teeth, each stator tooth having an assembly portion, the assembly portions of the multiple stator teeth respectively fitting into multiple assembly slots, each assembly portion including a working surface arranged opposite to the bottom wall of the slot, the pushing portion supporting between the bottom wall of the slot and the working surface to cause the assembly portion to expand and lock into the assembly slot; The assembly groove includes a first groove wall and a second groove wall arranged opposite to each other in the circumferential direction of the stator ring. The assembly part includes a first side wall and a second side wall arranged opposite to each other. When the assembly part is assembled into the assembly groove, at least one of the first groove wall and the second groove wall is in a stop-fitting engagement with at least one of the first side wall and the second side wall. The groove opening of the assembly groove is located on the outer peripheral wall of the stator ring and is arranged opposite to the bottom wall of the groove. The distance between the first groove wall and the second groove wall gradually decreases along the direction from the bottom wall of the groove to the groove opening, and the distance between the first side wall and the second side wall gradually decreases along the direction away from the working surface.

2. The stator assembly according to claim 1, characterized in that, The angles formed by the first and second tank walls and the bottom wall of the tank are both acute angles, and the first tank wall and the first side wall are fitted together to abut against each other, and the second tank wall and the second side wall are fitted together to abut against each other.

3. The stator assembly according to claim 2, characterized in that, The first tank wall and the bottom wall of the tank form an angle a1, and the second tank wall and the bottom wall of the tank form an angle a2, wherein the angles a1 and a2 are the same. The first sidewall and the working surface form an angle b1, and the second sidewall and the working surface form an angle b2, wherein the angles b1 and b2 are the same.

4. The stator assembly according to claim 1, characterized in that, The working surface is a plane; And / or, the mounting groove extends through the stator ring along its axial direction.

5. The stator assembly according to any one of claims 1-4, characterized in that, The pusher portion is integrally formed on the stator ring, and a portion of the pusher portion bends and extends along the axial direction of the stator ring to fit against the working surface for abutment.

6. The stator assembly according to claim 5, characterized in that, The bottom wall of the groove is provided with a protrusion, which protrudes from the bottom wall of the groove and is used to abut against the working surface to limit the upper limit of the extrusion deformation of the pushing part; And / or, there are multiple pushers, and the multiple pushers are arranged at circumferential intervals along the stator ring.

7. An electric motor, characterized in that, Includes the stator assembly as described in any one of claims 1-6 above.

8. A vehicle, characterized in that, Including the motor as described in claim 7 above.

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