Efficient stator and rotor structure of electro-tricycle

Abstract

The utility model provides an efficient stator and rotor structure of an electro-tricycle, which belongs to the field of motors and comprises a stator and a rotor, the rotor and the stator are concentrically arranged, a gap is reserved between the outer periphery of the rotor and the inner periphery of the stator, and specifically, the main body of the stator is of a circular ring structure, and the diameter of the inner ring of the stator is 69mm; twelve wire slots are annularly and uniformly formed in the inner circumference of the stator, the wire slots are used for winding and arranging stator winding coils, the wire slots are of fan-shaped structures, and communicated slot openings are formed between the middle parts of the inner edges of the wire slots and the inner ring of the stator; the excircle diameter of the rotor is 68mm, the center of the rotor is provided with a shaft hole, and the periphery of the rotor is uniformly provided with a plurality of groups of magnetic steel grooves at intervals. In the structure, the stator grooves are deepened, the inner diameter of the stator is reduced, correspondingly, the outer diameter of the rotor is reduced, the length of the magnetic steel grooves is reduced, the motor efficiency is effectively improved, the torque is increased, the noise generated by the motor is reduced, and the cost is saved, so that the economic benefit and the market competitiveness are improved.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and specifically relates to a high-efficiency stator and rotor structure for an electric tricycle. Background Art

[0002] With the rapid growth of the electric tricycle market, the market size of electric tricycle motors is also expanding. Competition in the motor market is fierce, and further improvements in motor efficiency are needed to enhance market competitiveness. However, due to the limited size specifications of electric tricycle motors, especially the maximum outer diameter of the motor, the outer ring diameter of the motor stator is fixed, and the structure of the motor rotor and stator is also relatively fixed, making efficiency difficult to improve. Summary of the Invention

[0003] The present application provides a high-efficiency stator and rotor structure for an electric tricycle, which improves motor efficiency and saves costs by designing and changing the stator and rotor structure.

[0004] The following technical solutions are adopted:

[0005] An efficient stator and rotor structure for an electric tricycle includes a stator and a rotor, wherein the rotor and the stator are concentrically arranged with a gap between the outer periphery of the rotor and the inner periphery of the stator, specifically comprising:

[0006] The stator body is a circular ring structure, and the diameter of the stator inner ring is 69 mm. Twelve wire slots are evenly arranged in a circular shape on the inner circumference of the stator. The wire slots are used to wind the stator winding coils. The wire slots are fan-shaped and have interconnected slots with the stator inner ring.

[0007] The outer diameter of the rotor is 68 mm, an axial hole is provided in the center of the rotor, and multiple groups of magnetic steel slots are evenly spaced on the outer circumference of the rotor.

[0008] By adopting the above technical solution, this structure deepens the stator slots and reduces the inner diameter. The stator inner diameter is reduced from 75mm to 69mm. The rotor outer diameter is also reduced from 74mm to 68mm, increasing electromagnetic torque. This means the motor can generate greater force, helping the electric tricycle perform better in climbing hills and carrying loads. It can also increase the motor's output power and torque density, and help reduce the motor's leakage magnetic induction electromotive force, thereby improving the motor's efficiency and performance.

[0009] Preferably, the depth of the wire trough is 19 mm.

[0010] By adopting the above technical solution, the depth of the stator slot is increased, the electromagnetic characteristics of the motor can be improved, the electromagnetic torque can be further increased, and the output power and torque density of the motor can be increased, thereby improving the efficiency and performance of the motor.

[0011] Preferably, the magnetic steel slots are grouped in pairs, and the two magnetic steel slots in the same group have the same inclined angle but opposite inclined directions, so that the magnetic steel slot group forms a conical structure with an acute angle toward the outer circumference of the rotor.

[0012] By adopting the above technical solution, the magnetic flux is more concentrated, the efficiency is improved, and the electromagnetic force fluctuations generated by the motor during operation are reduced, thereby reducing the noise and vibration levels of the motor.

[0013] Preferably, the length of the magnetic steel slot is 12.1 mm.

[0014] By adopting the above technical solution, the length of the magnetic steel slot is reduced from 14.3mm to 12.1mm, and the length of the magnetic steel slot is also correspondingly shortened. The shortened magnetic steel length reduces the amount of magnetic steel used and saves a certain amount of cost.

[0015] Preferably, the stator is composed of multiple layers of stator laminations with the same structure, a self-rivet prefabricated hole is provided in the middle between adjacent wire slots, and a plurality of circular rivet holes are evenly distributed along the circumferential direction on the stator outside the wire slots.

[0016] By adopting the above technical solution, the connection position is accurate through rivets and prefabricated self-rivet buckle prefabricated holes, thereby ensuring the connection stability of the stator laminations.

[0017] Preferably, a plurality of semicircular grooves with a radius of 1 mm are arranged at intervals on the outer circumference of the stator.

[0018] By adopting the above technical solution and rationally arranging grooves on the outer periphery of the stator, the heat dissipation effect can be effectively improved, making the motor run stably and reliably.

[0019] Preferably, the shaft hole is prefabricated with a flat key protrusion.

[0020] By adopting the above technical solution, the motor shaft can be directly fixed to the motor rotor without the need to install an additional flat key for connection.

[0021] Preferably, a plurality of arc-shaped slots are evenly distributed along the circumferential direction on the rotor between the magnetic steel slot group and the shaft hole.

[0022] By adopting the above technical solution, the arc-shaped slot setting does not affect the operation of the rotor and can reduce the weight of the rotor and improve work efficiency.

[0023] Preferably, the rotor is composed of multiple layers of rotor laminations with the same structure, five self-rivet prefabricated holes are evenly spaced on the outer circumference of the rotor, five rivet holes are spaced in the middle of the rotor, and the rivet holes and the self-rivet prefabricated holes are staggered along the circumferential direction.

[0024] By adopting the above technical solution, the connection position is accurate through rivets and prefabricated self-rivet prefabricated holes, thereby ensuring the connection stability of the rotor laminations.

[0025] In summary, the technical solutions provided in the embodiments of the present application have the following technical effects or advantages:

[0026] In this structure, the stator slots are deepened, the inner diameter of the stator is reduced, and accordingly, the outer diameter of the rotor is reduced, which reduces the length of the magnetic steel slots, effectively improves the motor efficiency, increases the torque, reduces the noise generated by the motor, saves costs, and thus improves economic benefits and enhances market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the stator-rotor matching structure of this application.

[0028] Figure 2 This is a schematic diagram of the structure of the stator in this application.

[0029] Figure 3 This is a schematic diagram of the structure of the rotor in this application.

[0030] Figure 4 It is a structural diagram of a rotor in the prior art.

[0031] Meaning of the accompanying symbols: 1. Stator; 11. Inner ring; 12. Outer ring; 13. Wire slot; 14. Notch; 15. Semicircular groove; 2. Rotor; 21. Outer ring; 22. Magnetic steel slot; 23. Shaft hole; 24. Arc slot; 3. Rivet hole; 4. Self-rivet prefabricated hole. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments.

[0033] An efficient stator and rotor structure for electric tricycles, see attached Figure 1 As shown, it includes a stator 1 and a rotor 2. The stator 1 is a circular ring structure, and the rotor 2 is a cylindrical structure. The rotor 2 and the stator 1 are concentrically arranged. There is a 1 mm gap between the outer periphery of the rotor 2 and the inner periphery of the stator 1. The rotor 2 can rotate flexibly inside the stator 1.

[0034] See attached Figure 2The figure shows the end face structure of the stator 1. In this embodiment, the main body of the stator 1 is a circular ring structure. The diameter of the stator 1 outer ring 12 is 119 mm, and the diameter of the stator inner ring 11 is 69 mm. Twelve wire slots 13 are evenly arranged in a ring around the inner circumference of the stator 1. The wire slots 13 are used to wind and arrange the stator 1 winding coils. The wire slots 13 are fan-shaped and have a depth of 19 mm. A connecting notch 14 is provided between the middle of the inner edge of the wire slot 13 and the stator inner ring 11. The width of the notch 14 is 2 mm.

[0035] The stator 1 is composed of multiple layers of identical stator laminations. A prefabricated self-rivet hole 4 is located between adjacent wire slots 13. This is used to position and install the self-rivet, locking the stator laminations and ensuring the connection strength between stator 1. Multiple circular rivet holes 3 are evenly distributed around the stator 1 around the periphery of the wire slots 13. The accompanying drawings show six rivet holes 3 for installing rivets to further secure the stator laminations.

[0036] A plurality of semicircular grooves 15 with a radius of 1 mm are arranged at intervals on the outer circumference of the stator 1 to assist in heat dissipation.

[0037] See attached Figure 3 The figure shows the end face structure of the rotor 2. The diameter of the outer circle 21 of the rotor 2 is 68 mm. An axial hole 23 is set in the center of the rotor 2. The axial hole 23 is prefabricated with a flat key protrusion. Multiple groups of magnetic steel slots 22 are evenly spaced on the outer circumference of the rotor 2. Each group of magnetic steel slots 22 is two relatively inclined groups. The magnetic steel slots 22 form a conical structure with an acute angle toward the circumference of the outer circle 21 of the rotor 2. The length of each magnetic steel slot 22 is 12.1 mm; the angle between adjacent magnetic steel slots 22 and the radius of the rotor 2 is 33°.

[0038] A plurality of arcuate slots 24 are evenly distributed along the circumferential direction on the rotor 2 between the magnetic steel slots 22 and the shaft hole 23 to reduce the mass of the stator 1 and improve efficiency.

[0039] The rotor 2 is composed of multiple layers of identical rotor laminations. Five self-rivet holes 4 are evenly spaced around the outer circumference of the rotor 2, located midway between the magnetic steel slots 22. Five rivet holes 3 are spaced apart in the middle of the rotor 2, located midway between the magnetic steel slots 22. The rivet holes 3 are circumferentially staggered from the self-rivet holes 4 to ensure connection stability at multiple radial positions.

[0040] See attached Figure 4The figure shows the rotor 2 structure of the prior art. The prior art rotor 2 has an outer diameter of 74 mm and a magnetic steel slot 22 length of 14.3 mm. This embodiment does not provide the prior art stator 1 structure. The prior art stator 1 structure is similar to the stator 1 structure of this application, except that the prior art stator inner ring 11 has a diameter of 75 mm and the electronic wire slot 13 is correspondingly smaller than that of this embodiment. This comparison shows that the solution of this application can improve the electromagnetic characteristics of the motor, thereby increasing the electromagnetic torque.

[0041] The above is only an exemplary embodiment of the present disclosure and cannot be used to limit the scope of the present disclosure. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the disclosure of the specification and the truth of practice, those skilled in the art will easily think of other embodiments of the present disclosure. This application is intended to cover any variation, use or adaptive change of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure.

Claims

1. An efficient stator and rotor structure for an electric tricycle, comprising a stator (1) and a rotor (2), wherein the rotor (2) and the stator (1) are arranged concentrically, and a gap is left between the outer periphery of the rotor (2) and the inner periphery of the stator (1), characterized in that: Specifically include: The stator (1) has a main body with a circular ring structure, and the diameter of the stator inner ring (11) is 69 mm. Twelve wire slots (13) are evenly arranged in a circular shape on the inner circumference of the stator (1). The wire slots (13) are used for winding and arranging the stator (1) winding coils. The wire slots (13) are fan-shaped structures, and mutually communicating notches (14) are provided between the wire slots (13) and the stator inner ring (11). The outer diameter of the rotor is 68 mm, an axial hole is provided in the center of the rotor, and multiple groups of magnetic steel slots are evenly spaced on the outer circumference of the rotor.

2. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The depth of the wire groove (13) is 19 mm.

3. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The magnetic steel slots (22) are arranged in groups of two, and the two magnetic steel slots (22) in the same group have the same inclined angle but opposite inclined directions, so that the magnetic steel slot (22) group forms a conical structure with an acute angle toward the circumferential direction of the outer circle (21) of the rotor (2).

4. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The length of the magnetic steel slot (22) is 12.1 mm.

5. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The stator (1) is composed of multiple layers of stator laminations with the same structure. A self-rivet prefabricated hole (4) is provided in the middle between adjacent wire slots (13). A plurality of circular rivet holes (3) are evenly distributed along the circumference of the stator (1) on the outer periphery of the wire slots (13).

6. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The outer periphery of the stator (1) is provided with a plurality of semicircular grooves (15) with a radius of 1 mm at intervals.

7. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The shaft hole (23) is prefabricated with a flat key protrusion.

8. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: A plurality of arc-shaped slots (24) are evenly distributed along the circumferential direction on the rotor (2) between the magnetic steel slot (22) group and the shaft hole (23).

9. The high-efficiency stator and rotor structure of an electric tricycle according to claim 1, characterized in that: The rotor (2) is composed of multiple layers of rotor laminations with the same structure. Five self-rivet prefabricated holes (4) are evenly spaced on the outer circumference of the rotor (2), and five rivet holes (3) are spaced in the middle of the rotor (2). The rivet holes (3) and the self-rivet prefabricated holes (4) are staggered in the circumferential direction.

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