Stator core of outer rotor hub motor

Abstract

The invention discloses an outer rotor hub motor stator iron core, and belongs to the technical field of motors, the outer rotor hub motor stator iron core comprises a shaft sleeve (1), a hub (2) and tooth parts (3), the hub (2) is arranged outside the shaft sleeve (1), a plurality of connecting grooves (4) are uniformly distributed in the periphery of the hub (2), each connecting groove (4) is internally provided with the tooth part (3), and each tooth part (3) comprises a tooth part main body (5), a connecting part I (6), a connecting part II (7) and a connecting part III (8). The connecting part I (6) is arranged in the connecting groove (4), the connecting part II (7) is provided with a groove (9), the connecting part III (8) is provided with a convex block (10), the adjacent tooth parts (3) are connected end to end, and a stator groove (11) is formed between the adjacent tooth part main bodies (5). According to the invention, the tooth parts (3) are connected with the hub (2) after being wound with a wire, so that the winding of a coil is facilitated, meanwhile, the groove fullness rate of the coil in the stator groove (11) can be increased, and the product performance is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors and relates to an electric vehicle stator, and in particular to an outer rotor hub motor stator core. Background Art

[0002] The stator core is a commonly used basic accessory of an electric motor and an important component of the motor. The existing stator core of an electric vehicle mainly includes a sleeve, a bracket and a stator connected to the wheel axle.

[0003] In the prior art, electric vehicle motors generally use flat wire windings to improve efficiency. The invention patent with publication number CN118783674A discloses a flat wire motor stator winding structure, including a stator core, a plurality of winding areas and a three-phase winding branch. The inner side surface of the stator core is evenly spaced along the circumferential direction with axially penetrating stator slots; the plurality of winding areas are arranged on the stator core, and each phase winding branch of the three-phase winding branch includes at least two sub-branch windings, which are wound in the stator slots and change along the circumferential direction or radial direction of the stator core, passing through each winding area in turn, and the two ends of the sub-branch winding are led outward.

[0004] The above patent changes the winding structure of the flat wire winding so that the winding forms a complete closed loop, thereby improving the motor performance and suppressing the motor noise. However, in actual operation, there are still problems such as long flat wire embedding time, low working efficiency, and low slot fill rate. Summary of the invention

[0005] The purpose of the present invention is to overcome the technical problems in the prior art that the stator core slot structure is not suitable for flat wire winding, the slot filling rate of the existing stator core structure is not high and affects product quality, and to provide a stator core structure to improve the slot filling rate of the motor stator core.

[0006] The above-mentioned outer rotor hub motor stator core comprises a shaft sleeve, a wheel hub and a tooth portion, the wheel hub is arranged outside the shaft sleeve, and a plurality of connecting grooves are evenly distributed on the outer circumference of the wheel hub, the groove direction of the connecting groove is parallel to the axis of the wheel hub, and a tooth portion is arranged in each connecting groove, and the tooth portion comprises a tooth portion main body, connecting portion one, connecting portion two and connecting portion three, connecting portion one is arranged at the lower end of the tooth portion main body, connecting portion one is arranged in the connecting groove, connecting portion two and connecting portion three are respectively arranged on both sides of the upper end of the tooth portion main body, connecting portion two is provided with a groove, and connecting portion three is provided with a protrusion, and adjacent teeth portions are connected end to end, and the protrusion of one tooth portion is arranged in the groove of another tooth portion, and a stator slot is formed between adjacent tooth portion main bodies.

[0007] During the production process, the flat wire is wound around the tooth body, and the tooth body with the flat wire wound is set in the connecting groove on the outer periphery of the hub. The teeth are connected by connecting part 1 and connecting part 2, and closed stator slots are formed between the teeth. This structure is convenient for the winding of the flat wire. At the same time, since the winding is carried out first and then the teeth are installed on the hub, the slot fill rate of the stator slot can be greatly improved. The processing method is convenient, and the product quality is improved while ensuring the processing efficiency.

[0008] As a further improvement measure of the present invention, in the above-mentioned stator core of the outer rotor hub motor, the width of the tooth body gradually increases from the lower end to the upper end, and the tooth is arranged in a "T" shape.

[0009] The width of the tooth body gradually increases from the lower end to the upper end to facilitate the winding of the flat wire. The width of the connecting portion 2 and the connecting portion 3 is greater than that of the tooth body. On the one hand, it can prevent the flat wire from being derailed during winding. On the other hand, when the connecting portion 2 and the connecting portion 3 of adjacent teeth are connected, a closed stator slot can be formed between the tooth bodies.

[0010] As a further improvement measure of the present invention, in the above-mentioned outer rotor hub motor stator core, the width of the connecting part one is smaller than the width of the tooth body, the connecting part one is dovetail-shaped, the connecting groove is a dovetail-shaped groove, and the connecting part one is connected to the connecting groove by mortise and tenon, which is convenient for the installation and disassembly of the tooth part and the connecting groove, and is convenient for fixing the tooth part.

[0011] As a further improvement measure of the present invention, the above-mentioned outer rotor hub motor stator core, the hub includes a bracket and a connecting ring, the bracket is arranged outside the sleeve, the connecting ring is arranged outside the bracket, the connecting grooves are evenly distributed on the outer surface of the connecting ring, the bracket can play a supporting role, and the connecting ring is connected to the tooth portion.

[0012] As a further improvement measure of the present invention, the above-mentioned stator core of the outer rotor hub motor, the connecting ring and the bracket are an integrated structure, the material is aluminum, the integrated structure of the connecting ring and the bracket is easy to process, and the use of aluminum material is convenient for compression molding.

[0013] As a further improvement measure of the present invention, in the above-mentioned stator core of the outer rotor hub motor, the connecting ring and the bracket are of a split structure, the connecting ring and the bracket are interference fit, and the material is aluminum, in order to facilitate the processing of the connecting ring and the bracket.

[0014] As a further improvement measure of the present invention, the above-mentioned outer rotor hub motor stator core, the bracket includes an inner ring and an outer ring, a connecting column is arranged between the inner ring and the outer ring, and a triangular process hole is arranged between the connecting columns. The connecting columns play a supporting role, and the process holes are easy to process, improve the structural strength, and reduce raw materials.

[0015] As a further improvement measure of the present invention, in the above-mentioned stator core of the outer rotor hub motor, the material of the shaft sleeve and the tooth portion is silicon steel material.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. A plurality of connecting grooves are arranged on the outer surface of the hub, each connecting groove is provided with a tooth portion, the flat wire is wound on the tooth portion, and then installed to the hub, which is convenient for winding the flat wire; 2. The teeth are connected to each other by connecting portion two and connecting portion three to form a closed stator slot, and at the same time, the slot fill rate of the coil in the stator slot can be increased, thereby improving product performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a stator core of an outer rotor hub motor of the present invention.

[0018] Figure 2 It is a stereoscopic diagram of a stator core of an outer rotor hub motor of the present invention.

[0019] Figure 3 It is a front view of the wheel hub of the present invention.

[0020] Figure 4 It is a three-dimensional view of the wheel hub of the present invention.

[0021] Figure 5 It is a front view of the tooth portion of the present invention.

[0022] Figure 6 It is a three-dimensional diagram of the tooth portion of the present invention.

[0023] Explanation of the accompanying numbers: 1. Bushing, 2. Hub, 3. Tooth, 4. Connecting groove, 5. Tooth body, 6. Connecting part one, 7. Connecting part two, 8. Connecting part three, 9. Groove, 10. Bump, 11. Stator slot, 12. Bracket, 13. Connecting ring, 14. Inner ring, 15. Outer ring, 16. Connecting column. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0026] like Figures 1 to 4As shown, an outer rotor hub 2 stator core structure, the core includes a sleeve 1 made of silicon steel, a hub 2 made of aluminum and a tooth portion 3 made of silicon steel, the hub 2 is arranged outside the sleeve 1, the hub 2 includes a bracket 12 and a connecting ring 13, the bracket 12 is arranged outside the sleeve 1, the connecting ring 13 is arranged outside the bracket 12, the connecting ring 13 and the bracket 12 are an integrated structure, the integrated structure of the connecting ring 13 and the bracket 12 is easy to process, and is made of aluminum material for easy compression molding, 32 connecting grooves 4 are evenly distributed on the periphery of the connecting ring 13, each connecting groove 4 is provided with a tooth portion 3, the bracket 12 can play a supporting role, and the connecting ring 13 is connected to the tooth portion 3.

[0027] like Figure 2 , Figure 5 and Figure 6 As shown, the tooth portion 3 includes a tooth portion main body 5, a connecting portion 1 6, a connecting portion 2 7 and a connecting portion 3 8. The connecting portion 1 6 is arranged at the lower end of the tooth portion main body 5. The connecting portion 1 6 is arranged in the connecting groove 4. The width of the connecting portion 1 6 is smaller than the width of the tooth portion main body 5. The connecting portion 1 6 is dovetail-shaped, and the connecting groove 4 is a dovetail-shaped groove. The connecting portion 1 6 and the connecting groove 4 are connected by mortise and tenon joints, which is convenient for the installation and disassembly of the tooth portion 3 and the connecting groove 4, and is convenient for fixing the tooth portion 3.

[0028] like Figure 2 , Figure 5 and Figure 6 As shown, the second connection part 7 and the third connection part 8 are respectively arranged on both sides of the upper end of the tooth body 5, and the width of the tooth body 5 gradually increases from the lower end to the upper end. The width of the second connection part 7 and the third connection part 8 at the top of the tooth 3 is greater than the tooth body 5. The tooth 3 is arranged in a "T" shape, the second connection part 7 is provided with a groove 9, and the third connection part 8 is provided with a protrusion 10. The teeth 3 are connected end to end, the groove 9 is arranged on the side wall of the second connection part 7, and the protrusion 10 is arranged on the side wall of the first connection part 6. Even the protrusion 10 of one tooth 3 is arranged in the groove 9 of another tooth 3, and a stator slot 11 is formed between adjacent tooth bodies 5. The width of the tooth body 5 gradually increases from the lower end to the upper end to facilitate the winding of the flat wire. The width of the second connection part 7 and the third connection part 8 is greater than the tooth body 5. On the one hand, the flat wire can be prevented from being derailed during winding. On the other hand, when the second connection part 7 and the third connection part 8 of adjacent teeth 3 are connected, a closed stator slot 11 can be formed between the tooth bodies 5.

[0029] like Figure 3 , Figure 4 As shown, the bracket 12 includes an inner ring 14 and an outer ring 15, a connecting column 16 is arranged between the inner ring 14 and the outer ring 15, and a triangular process hole is arranged between the connecting column 16 and the connecting column 16. The connecting column 16 plays a supporting role, and the process hole is easy to process, improves the structural strength, and reduces raw materials.

[0030] The above describes the embodiments of the present invention in detail in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. For ordinary technicians in this field, several modifications and improvements can be made without departing from the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. An outer rotor hub motor stator core, characterized in that: The iron core comprises a shaft sleeve (1), a wheel hub (2) and a tooth portion (3). The wheel hub (2) is arranged outside the shaft sleeve (1). A plurality of connection grooves (4) are evenly distributed on the outer circumference of the wheel hub (2). A tooth portion (3) is arranged in each connection groove (4). The tooth portion (3) comprises a tooth portion body (5), a connection portion one (6), a connection portion two (7) and a connection portion three (8). The connection portion one (6) is arranged at the lower end of the tooth portion body (5). The connection portion one (6) is arranged in the connection groove (4). The connection portion two (7) and the connection portion three (8) are respectively arranged on both sides of the upper end of the tooth portion body (5). The connection portion two (7) is provided with a groove (9). The connection portion three (8) is provided with a protrusion (10). Adjacent tooth portions (3) are connected end to end. The protrusion (10) of one tooth portion (3) is arranged in the groove (9) of another tooth portion (3). Stator slots (11) are formed between adjacent tooth portion bodies (5).

2. The stator core of an outer rotor hub motor according to claim 1, characterized in that: The width of the tooth body (5) gradually increases from the lower end to the upper end, and the tooth (3) is arranged in a "T" shape.

3. The stator core of an outer rotor hub motor according to claim 2, characterized in that: The width of the connecting portion 1 (6) is smaller than the width of the tooth portion main body (5); the connecting portion 1 (6) is dovetail-shaped; the connecting groove (4) is a dovetail-shaped groove; the connecting portion 1 (6) and the connecting groove (4) are connected by mortise and tenon joints.

4. The stator core of an outer rotor hub motor according to claim 3, characterized in that: The wheel hub (2) comprises a bracket (12) and a connecting ring (13); the bracket (12) is arranged outside the shaft sleeve (1); the connecting ring (13) is arranged outside the bracket (12); and the connecting grooves (4) are evenly distributed on the outer surface of the connecting ring (13).

5. The stator core of an outer rotor hub motor according to claim 4, characterized in that: The connecting ring (13) and the bracket (12) are an integrated structure.

6. The stator core of an outer rotor hub motor according to claim 5, characterized in that: The bracket (12) comprises an inner ring (14) and an outer ring (15), a connecting column (16) is provided between the inner ring (14) and the outer ring (15), and a triangular process hole is provided between the connecting columns (16).

7. The stator core of an outer rotor hub motor according to claim 6, characterized in that: The shaft sleeve (1) and the tooth portion (3) are made of silicon steel.

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