CN221305713U

CN221305713U - Composite magnetic field hub motor

Info

Publication number: CN221305713U
Application number: CN202322935393.2U
Authority: CN
Inventors: 陈游; 刘豪杰; 陈正平; 蒋甜珍
Original assignee: Chongqing Yadi Technology Co ltd
Current assignee: Chongqing Yadi Technology Co ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-07-09
Anticipated expiration: 2033-10-31

Abstract

The utility model belongs to the technical field of hub motors and discloses a composite magnetic field hub motor, which comprises a rotor assembly and a stator assembly, wherein the rotor assembly can rotate around a motor shaft, the rotor assembly comprises a hub body and a magnetic steel assembly, the magnetic steel assembly is arranged around the motor shaft and comprises axial magnetic steel extending along the axial direction of the motor shaft and radial magnetic steel extending along the radial direction of the motor shaft, and the magnetic steel assembly is arranged in the hub body and is connected with the inner wall of the hub body; the stator assembly comprises a stator bracket, windings, an axial stator core corresponding to the axial magnetic steel and a radial stator core corresponding to the radial magnetic steel, the stator bracket is sleeved on the motor shaft, the axial stator core and the radial stator core are connected with the motor shaft through the stator bracket, and an axial magnetic field and a radial magnetic field are simultaneously arranged in the hub motor, so that the structure is compact, and the power density of the hub motor can be increased in a limited space.

Description

Composite magnetic field hub motor

Technical Field

The utility model relates to the technical field of hub motors, in particular to a composite magnetic field hub motor.

Background

With the development of new energy technology, the electric two-wheel vehicle is gradually replacing the traditional fuel motorcycle, the electric two-wheel vehicle mostly adopts a hub motor as a power source, the existing hub motor is mostly a radial magnetic flux hub motor, only one power source exists, the power density is limited under the same volume, and the increasing power requirement of the electric two-wheel vehicle cannot be met. Therefore, there is a need for a compound field in-wheel motor to solve the above problems.

Disclosure of utility model

One object of the present utility model is to:

The composite magnetic field wheel hub motor is compact in structure, and the power density of the wheel hub motor can be increased in a limited space.

To achieve the purpose, the utility model adopts the following technical scheme:

a compound field in-wheel motor comprising: a motor shaft;

The rotor assembly can rotate around a motor shaft and comprises a hub body and a magnetic steel assembly, the magnetic steel assembly is arranged around the motor shaft and comprises axial magnetic steel extending along the axial direction of the motor shaft and radial magnetic steel extending along the radial direction of the motor shaft, and the magnetic steel assembly is connected with the inner wall of the hub body;

The stator assembly comprises a stator bracket, windings, an axial stator core corresponding to the axial magnetic steel and a radial stator core corresponding to the radial magnetic steel, wherein the stator bracket is sleeved on the motor shaft, and the axial stator core and the radial stator core are connected with the motor shaft through the stator bracket.

Preferably, the axial stator core and the axial magnetic steel are arranged at intervals, an axial air gap is formed between the axial stator core and the axial magnetic steel, the radial stator core and the radial magnetic steel are arranged at intervals, and a radial air gap is formed between the radial stator core and the radial magnetic steel.

Preferably, the axial stator core includes an axial tooth portion, the winding is wound around a circumferential portion of the axial tooth portion, the radial stator core includes a radial tooth portion, and the winding is wound around a circumferential portion of the radial tooth portion.

Preferably, the same group of the windings is wound around the peripheral portions of the adjacent axial teeth and radial teeth;

Or the winding comprises a radial coil wound on the radial tooth part and an axial coil wound on the axial tooth part, and the radial coil and the axial coil are arranged in a separated mode.

Preferably, an oil stirring assembly is arranged in the hub body, and the oil stirring assembly can splash cooling liquid in the hub body to the stator assembly.

Preferably, the oil stirring assembly comprises a first oil stirring plate and a second oil stirring plate, wherein the first oil stirring plate and the second oil stirring plate are respectively arranged on two sides of the stator support, and the first oil stirring plate and the second oil stirring plate are respectively connected with the inner wall of the hub body.

Preferably, the composite magnetic field hub motor further comprises a plurality of bearings, the bearings are sleeved on the motor shaft, and the hub body is connected with the motor shaft through the bearings.

Preferably, a sealing element is arranged at the outer end of the bearing, the sealing element is sleeved on the motor shaft, and the sealing element is used for sealing a gap between the hub body and the motor shaft.

Preferably, the composite magnetic field hub motor further comprises a dust cover, wherein the dust cover is arranged at the outer end of the sealing piece and is fixedly connected with the motor shaft.

Preferably, a metal plate is arranged at one end of the dust cover facing the sealing member, an outwardly protruding lip sealing portion is arranged at the outer end of the sealing member, and the lip sealing portion abuts against the metal plate.

The utility model has the beneficial effects that:

The utility model provides a composite magnetic field hub motor, which comprises a rotor assembly and a stator assembly, wherein the rotor assembly can rotate around a motor shaft, the rotor assembly comprises a hub body and a magnetic steel assembly arranged on the inner wall of the hub body, the magnetic steel assembly surrounds the motor shaft and comprises axial magnetic steel extending along the axial direction and radial magnetic steel extending along the radial direction, the axial magnetic steel and the radial magnetic steel form a composite magnetic field in the hub body, the stator assembly comprises an axial stator iron core corresponding to the axial magnetic steel and a radial stator iron core corresponding to the radial magnetic steel, when the composite magnetic field hub motor operates, torque capable of driving the rotor assembly to rotate is generated between the axial stator iron core and the axial magnetic steel, and meanwhile, the same-direction torque capable of driving the rotor assembly to rotate is also generated between the radial stator iron core and the radial magnetic steel, the axial stator iron core and the axial magnetic steel are matched to be equivalent to the outer rotor hub motor, and the radial stator iron core and the radial magnetic steel are matched to be equivalent to the disc hub motor, namely the composite magnetic field hub motor jointly generates torque and drives the rotor assembly to rotate, so that the power density of the hub motor can be increased in a limited space.

Drawings

The utility model is described in further detail below with reference to the drawings and examples;

FIG. 1 is an exploded view of a compound field in-wheel motor;

FIG. 2 is a cross-sectional view of a compound field in-wheel motor;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is an isometric view of a stator assembly;

FIG. 6 is a cross-sectional view of the stator assembly;

Fig. 7 is an isometric view of the winding of the present embodiment;

Fig. 8 is an isometric view of a winding of other embodiments.

In the figure:

11. a hub body; 111. a magnetic conductive ring; 112. an end cap; 113. a hub cap; 114. a rim; 12. axial magnetic steel; 13. radial magnetic steel; 14. a magnetic conductive plate;

2. A stator assembly; 21. a stator support; 22. a winding; 23. an axial stator core; 24. a radial stator core; 221. an axial coil; 222. a radial coil; 231. an axial air gap; 232. an axial tooth; 241. a radial air gap; 242. radial teeth;

31. A first oil stirring plate; 32. a second oil stirring plate;

4. A bearing;

5. a seal; 51. a lip seal;

6. A dust cover; 61. a metal plate; 62. a rotation stopper;

7. and a motor shaft.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and to simplify the operation, rather than to indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for providing a special meaning.

In the description herein, reference to the term "one embodiment," "an example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 2, a composite magnetic field hub motor is provided, which comprises a rotor assembly, a stator assembly 2 and a plurality of bearings 4, wherein the rotor assembly is sleeved on a motor shaft 7 and can rotate around the motor shaft 7, the hub motor comprises two bearings 4, the two bearings 4 are sleeved on the motor shaft 7, the two bearings 4 are respectively arranged at two axial ends of the rotor assembly, and the rotor assembly is rotationally connected with the motor shaft 7 through the bearings 4. The rotor assembly comprises a hub body 11 and a magnetic steel assembly, wherein the magnetic steel assembly surrounds the motor shaft 7 and is connected with the hub body 11, the magnetic steel assembly comprises axial magnetic steel 12 extending along the axial direction of the motor shaft 7 and radial magnetic steel 13 extending along the radial direction of the motor shaft 7, the magnetic steel assembly is arranged in the hub body 11 and is connected with the inner wall of the hub body 11, and the axial magnetic steel 12 and the radial magnetic steel 13 form a composite magnetic field in the hub body 11. Illustratively, the hub body 11 includes a magnetic ring 111, a rim 114, an end cover 112 and a hub cover 113, the rim 114 is mounted on the periphery of the magnetic ring 111 and is fixedly connected with the magnetic ring 111 by welding or the like, the rim 114 is used for mounting a tire, the end cover 112 and the hub cover 113 are disposed at two axial ends of the magnetic ring 111 and are fixedly connected with the magnetic ring 111 by a bolt structure, the magnetic ring 111 is connected with the end cover 112 and the hub cover 113 to form a cavity capable of containing cooling liquid, the axial magnetic steel 12 is fixedly connected with the inner wall of the magnetic ring 111, the radial magnetic steel 13 is fixedly connected with the inner wall of the hub cover 113 by a magnetic conductive plate 14, the axial magnetic steel 12 and the radial magnetic steel 13 are separately arranged, the magnetic ring 111 and the magnetic conductive plate 14 are made of magnetic materials such as silicon steel, and the magnetic ring 111 and the magnetic conductive plate 14 play a role of concentrating magnetic fields.

As shown in fig. 1 to 6, the stator assembly 2 includes a stator bracket 21, a winding 22, an axial stator core 23 disposed corresponding to the axial magnetic steel 12, and a radial stator core 24 disposed corresponding to the radial magnetic steel 13, the axial stator core 23 and the radial stator core 24 are fixed by the stator bracket 21, and simultaneously the stator bracket 21 is sleeved on the motor shaft 7 and connected with the motor shaft 7, the axial stator core 23 and the radial stator core 24 are connected with the motor shaft 7 by the stator bracket 21, the winding 22 is wound on the outside of the axial stator core 23 and the radial stator core 24, and the axial stator core 23 and the radial stator core 24 are separately disposed. The axial stator core 23 and the axial magnetic steel 12 are arranged at intervals, an axial gap is formed between the axial stator core 23 and the axial magnetic steel 12, a radial stator core 24 and the radial magnetic steel 13 are arranged at intervals, a radial gap is formed between the radial stator core 24 and the radial magnetic steel 13, when the composite magnetic field hub motor operates, the axial gap and the radial gap generate torque capable of driving the rotor assembly to rotate, the axial stator core 23 and the axial magnetic steel 12 are matched to be equivalent to an outer rotor hub motor, the radial stator core 24 and the radial magnetic steel 13 are matched to be equivalent to a disc hub motor, namely, the two magnetic fields jointly generate torque and drive the rotor assembly when the composite magnetic field hub motor operates, the power of the composite magnetic field hub motor is equivalent to the superposition of the power of one outer rotor hub and one disc hub motor, the structure is more compact, and the power density of the hub motor can be increased in a limited space so as to meet the higher power requirement of a user.

As shown in fig. 5 to 7, the axial stator core 23 includes an axial tooth 232, the radial stator core 24 includes a radial tooth 242, the winding 22 is wound around the axial tooth 232 and the radial tooth 242, and illustratively, the winding 22 is wound across the axial tooth 232 and the radial tooth 242, the winding 22 is made of copper wires, and a round wire or a flat wire can be adopted, so that the use amount of the copper wires can be effectively reduced by winding across the axial tooth 232 and the radial tooth 242, thereby reducing the production cost.

In other embodiments, as shown in fig. 8, the winding 22 includes a radial coil 222 wound around the radial teeth 242 and an axial coil 221 wound around the axial teeth 232, the radial coil 222 and the axial coil 221 being spaced apart, and a torque between the axial gap and the radial gap being capable of driving the rotor assembly to rotate when current flows between the axial coil 221 and the radial coil 222.

As shown in fig. 1 and fig. 2, an oil stirring component is arranged in the hub body 11, and can splash the cooling liquid in the hub body 11 to the stator component 2, so that the heat dissipation capacity of the composite magnetic field hub motor is improved, and the higher heat dissipation requirement of the hub motor can be met under the condition of improving the power density. Illustratively, the oil stirring assembly includes a first oil stirring plate 31 and a second oil stirring plate 32, the first oil stirring plate 31 and the second oil stirring plate 32 are respectively disposed at two sides of the stator support 21 and are respectively connected with an inner wall of the hub body 11, specifically, the first oil stirring plate 31 is fixedly connected with the end cover 112 through a bolt structure, the second oil stirring plate 32 is fixedly connected with the hub cover 113 through a bolt structure, and the first oil stirring plate 31 and the second oil stirring plate 32 can rotate along with the rotor assembly. Because the coolant liquid has viscosity, the rotor subassembly rotates the in-process, and the coolant liquid can adhere to on first stirring oil board 31 and the second stirring oil board 32, and first stirring oil board 31 and the second stirring oil board 32 rotate the in-process, and the coolant liquid splashes to the outer end of stator module 2 under the drive of centrifugal force, and first stirring oil board 31 and second stirring oil board 32 exist relative motion with the coolant liquid, and first stirring oil board 31 and second stirring oil board 32 rotate the in-process and can drive the coolant liquid to the outer end of stator module 2 for the cooling rate of stator module 2. Further, the outer end of the first oil stirring plate 31 faces the winding 22 of the iron core wound on the axial tooth portion 232, and the outer end of the second oil stirring plate 32 faces the winding 22 wound on the radial tooth portion 242, so that the cooling liquid can be precisely splashed onto the winding 22, the cooling speed of the winding 22 is accelerated, and the heat dissipation performance of the hub motor is further improved.

As shown in fig. 1 and 2, the outer ring of the bearing 4 is connected with the hub body 11, the inner ring of the bearing 4 is connected with the motor shaft 7, the motor shaft 7 is provided with a shaft shoulder which is abutted with the bearing 4, meanwhile, the hub body 11 can be abutted with the outer end face of the bearing 4, the hub body 11 and the shaft shoulder limit the bearing 4 on the bearing 4 mounting position of the motor shaft 7, the bearing 4 is prevented from sliding on the motor shaft 7, the rotational connection of the hub body 11 and the motor shaft 7 is realized through the bearing 4, the friction force between the hub body 11 and the motor shaft 7 can be effectively reduced, and the service life of the hub motor is prolonged.

Because the hub body 11 is not directly connected with the motor shaft 7, in order to prevent the cooling liquid from flowing out from the bearing 4, the outer end of the bearing 4 is provided with the sealing element 5, the sealing element 5 is sleeved on the motor shaft 7, and the hub body 11 is correspondingly provided with a mounting groove for embedding the sealing element 5, so that the sealing element 5 is prevented from directly contacting with the bearing 4 to influence the performance of the bearing 4; the sealing element 5 is made of elastic materials, and the sealing element 5 is used for sealing a gap between the hub body 11 and the motor shaft 7 to prevent cooling liquid from flowing out.

Further, the outer end of the sealing piece 5 is provided with a dust cover 6, the dust cover 6 is covered on the outer end of the sealing piece 5, and the dust cover 6 can prevent dust and gravel in the air from invading into the sealing piece 5, so that the sealing is invalid. Illustratively, the dust cover 6 is sleeved on the motor shaft 7, and is fixedly connected with the motor shaft 7 through the rotation stopping member 62, the rotation stopping member 62 can adopt a structure such as a rotation stopping screw or a spring pin to realize the fixed connection between the dust cover 6 and the motor shaft 7, and meanwhile, the rotation stopping member 62 is detachably connected with the motor shaft 7, so that the dust cover 6 is convenient to detach and clean.

Further, a metal plate 61 is arranged at one end of the dust cover 6 facing the sealing member 5, an outwardly protruding lip seal portion 51 is arranged at the outer end of the sealing member 5, the lip seal portion 51 is abutted against the metal plate 61, the whole sealing member 5 is made of elastic materials such as rubber or silica gel, the lip seal portion 51 is pressed and abutted against the surface of the metal plate 61, the surface of the metal plate 61 can be tightly attached to form a lip seal structure, the sealing capability of the sealing member 5 is further improved, and coolant is prevented from flowing out or exuding.

Furthermore, the foregoing description of the preferred embodiments and the principles of the utility model is provided herein. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims

1. A composite field in-wheel motor, comprising:

A motor shaft (7);

The rotor assembly comprises a hub body (11) and a magnetic steel assembly, the magnetic steel assembly is arranged around the motor shaft (7), the magnetic steel assembly comprises axial magnetic steel (12) extending along the axial direction of the motor shaft (7) and radial magnetic steel (13) extending along the radial direction of the motor shaft (7), and the magnetic steel assembly is connected with the inner wall of the hub body (11);

Stator module (2), stator module (2) include stator support (21), winding (22), correspond axial stator core (23) that axial magnet steel (12) set up and correspond radial stator core (24) that radial magnet steel (13) set up, stator support (21) cover is located motor shaft (7), axial stator core (23) with radial stator core (24) pass through stator support (21) with motor shaft (7) are connected.

2. The composite magnetic field hub motor of claim 1, wherein the axial stator core (23) is disposed at intervals with the axial magnetic steel (12), an axial air gap (231) is formed between the axial stator core (23) and the axial magnetic steel (12), the radial stator core (24) is disposed at intervals with the radial magnetic steel (13), and a radial air gap (241) is formed between the radial stator core (24) and the radial magnetic steel (13).

3. The composite field in-wheel motor of claim 2, wherein the axial stator core (23) includes an axial tooth (232), the winding (22) is wound around a circumference of the axial tooth (232), the radial stator core (24) includes a radial tooth (242), and the winding (22) is wound around a circumference of the radial tooth (242).

4. A composite field in-wheel motor according to claim 3, characterized in that the same set of windings (22) is wound around the periphery of the adjacent axial teeth (232) and radial teeth (242);

Or the winding (22) comprises a radial coil (222) wound on the radial tooth part (242) and an axial coil (221) wound on the axial tooth part (232), and the radial coil (222) and the axial coil (221) are arranged separately.

5. The composite magnetic field hub motor according to claim 1, wherein an oil stirring assembly is arranged in the hub body (11), and the oil stirring assembly can splash cooling liquid in the hub body (11) to the stator assembly (2).

6. The composite magnetic field hub motor according to claim 5, wherein the oil stirring assembly comprises a first oil stirring plate (31) and a second oil stirring plate (32), the first oil stirring plate (31) and the second oil stirring plate (32) are respectively arranged on two sides of the stator support (21) and the first oil stirring plate (31) and the second oil stirring plate (32) are respectively connected with the inner wall of the hub body (11).

7. The composite magnetic field hub motor according to any one of claims 1-6, further comprising a plurality of bearings (4), wherein the bearings (4) are sleeved on the motor shaft (7), and the hub body (11) is connected with the motor shaft (7) through the bearings (4).

8. The composite magnetic field hub motor according to claim 7, wherein a sealing member (5) is arranged at the outer end of the bearing (4), the sealing member (5) is sleeved on the motor shaft (7), and the sealing member (5) is used for sealing a gap between the hub body (11) and the motor shaft (7).

9. The composite magnetic field hub motor according to claim 8, further comprising a dust cover (6), wherein the dust cover (6) is covered at the outer end of the sealing member (5) and the dust cover (6) is fixedly connected with the motor shaft (7).

10. The composite magnetic field hub motor according to claim 9, wherein a metal plate (61) is provided at an end of the dust cover (6) facing the seal member (5), an outwardly protruding lip seal portion (51) is provided at an outer end of the seal member (5), and the lip seal portion (51) abuts against the metal plate (61).