CN221162194U

CN221162194U - Hub motor, wheel side system and vehicle

Info

Publication number: CN221162194U
Application number: CN202322946157.0U
Authority: CN
Inventors: 宋淦; 汤蒙; 李建华; 李璐
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-10-31
Filing date: 2023-10-31
Publication date: 2024-06-18
Anticipated expiration: 2033-10-31

Abstract

The application discloses a hub motor, a wheel side system and a vehicle, wherein the hub motor comprises: the rotor end cover and the brake disc are integrated into a whole. The application can reduce the number of parts and further reduce the unsprung mass.

Description

Hub motor, wheel side system and vehicle

Technical Field

The application relates to the field of vehicles, in particular to an in-wheel motor, a wheel side system and a vehicle.

Background

In the prior art, the hub motor of the vehicle is a single motor, and the hub motor and the brake disc of the brake are connected together by adopting a connecting piece such as a bolt, so that excessive parts are caused, and finally, the weight of the wheel is seriously increased, and the unsprung mass is excessively large.

Disclosure of Invention

An object of the present application is to provide a new technical solution for an in-wheel motor, a wheel rim system and a vehicle.

To achieve the above object, according to a first aspect of the present application, there is provided a hub motor comprising: the rotor end cover and the brake disc are integrated into a whole.

Alternatively, the rotor end cover is integrally formed with the brake disc, or the rotor end cover is in interference fit with the brake disc.

Optionally, the rotor end cap has a neck portion that is an interference fit with the brake disc.

Optionally, the hub motor further comprises a rotor housing, and the rotor housing is fixedly connected with the rotor end cover.

Optionally, the rotor housing is integrally formed with the rotor end cap.

Optionally, the rotor end cover is fixedly connected with the end face of the rotor housing.

Optionally, the rotor end cover is fixedly connected with the inner wall surface of the rotor housing.

Optionally, the hub motor further comprises a stator assembly, the stator assembly is installed in the rotor housing, the rotor end cover is provided with a through hole, the stator assembly is provided with a stator shaft installation hole, and the stator shaft installation hole is coaxial with the through hole.

According to a second aspect of the present application there is also provided a wheel rim system comprising: a steering knuckle and an in-wheel motor as claimed in any one of the preceding claims, the in-wheel motor being connected to the steering knuckle.

Optionally, the knuckle has a stationary shaft that passes through a through hole of a rotor end cover of the in-wheel motor and a stator shaft mounting hole of a stator assembly of the in-wheel motor.

Alternatively, the fixed shaft is integrally formed with the knuckle, or the fixed shaft is detachably connected with the knuckle.

Optionally, the wheel side system further comprises a brake caliper mounted to the knuckle.

According to a third aspect of the present application, there is also provided a vehicle mounted with an in-wheel motor as claimed in any one of the preceding claims, or with a wheel-side system as claimed in any one of the preceding claims.

According to the hub motor, the rotor end cover and the brake disc are integrated into a whole, so that the number of parts is reduced, the weight of a wheel is finally reduced, and the unsprung mass of a vehicle is reduced.

Other features of the present application and its advantages will become apparent from the following detailed description of exemplary embodiments of the application, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.

FIG. 1 is a perspective view of an integrated construction of a rotor end cover and brake disc of an embodiment of the present application;

fig. 2 is an exploded view of a hub motor according to an embodiment of the present application;

FIG. 3 is a front view of a steering knuckle of an embodiment of the present application;

FIG. 4 is a right side view of a steering knuckle of an embodiment of the application;

FIG. 5 is an exploded view of a wheel-side system of an embodiment of the present application;

FIG. 6 is an exploded view of the connection structure of the hub and the hub of the hub system according to the embodiment of the present application.

Reference numerals illustrate:

1. A rotor end cap; 2. a brake disc; 3. a neck; 4. a rotor housing; 5. an end face; 6. an inner wall surface; 7. a stator assembly; 8. a through hole; 9. a stator shaft mounting hole; 10. a bearing; 11. a nut; 12. a knuckle; 13. a fixed shaft; 14. a brake caliper; 15. brake caliper mounting holes; 16. a hub.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 and 2, the in-wheel motor in the present embodiment includes: a rotor end cover 1 and a brake disc 2, wherein the rotor end cover 1 and the brake disc 2 are integrated into a whole.

More specifically, the rotor end cap 1 is part of a rotor assembly of an in-wheel motor for enclosing a stator assembly 7 of the in-wheel motor within a rotor housing 4. The brake disc 2 is part of a vehicle brake for vehicle braking. The advantage of this construction is that the rotor end cap 1 forms a part with the brake disc 2, without the need for bolting, saving the number of parts and thus reducing the overall weight of the wheel.

The integration of the rotor end cap 1 with the brake disc 2 can take many forms. In one embodiment, the rotor end cap 1 is integrally formed with the brake rotor 2 by, for example, casting, stamping, or the like. In another embodiment, the rotor end cap 1 is an interference fit with the brake disc 2.

As shown in fig. 1, the rotor end cap 1 has a neck portion 3, and the neck portion 3 is in interference fit with the brake disc 2.

More specifically, the rotor end cover 1 with the neck 3 and the brake disc 2 can be machined first, then the brake disc 2 is sleeved on the neck 3 in a heated state, and after the brake disc 2 is cooled, the brake disc can be in interference fit with the neck 3.

In the present embodiment, the brake disc 2 is shown in the form of a caliper brake, and the neck 3 itself may also act as the brake disc 2 when an inner expanding shoe brake is employed. In this case, the neck 3 is formed in one piece with the rotor end cap 1 more simply, and this structure also falls within the scope of the rotor end cap 1 being integrated with the brake disc 2 as described above.

As shown in fig. 2, the rotor housing 4 is fixedly connected to the rotor end cover 1.

More specifically, the rotor housing 4 is part of the rotor assembly of the in-wheel motor and functions to connect together with the hub 16 of the wheel as shown in fig. 6, so as to co-rotate with the wheel. After the rotor housing 4 is fixedly connected with the rotor end cover 1, the rotor end cover 1 also rotates together with the wheel.

The fixed connection between the rotor housing 4 and the rotor end cover 1 may be detachable connection or non-detachable connection.

In the non-detachable connection, the rotor housing 4 is integrally formed with the rotor end cap 1. In this structure, the rotor end cover 1 can be regarded as a bottom wall of the rotor housing 4, and the structure is simpler and the processing is convenient.

In the detachable connection, the rotor end cap 1 is fixedly connected with the end face 5 of the rotor housing 4 by means of bolting, welding or the like. The advantage of this construction is that the integration of the rotor end cap 1 with the brake disc 2 is simpler, without regard to the difficulty of machining the rotor housing 4.

Or the rotor end cover 1 and the inner wall surface 6 of the rotor housing 4 are fixedly connected by a bolt connection, welding and the like. The advantage of this construction is that the positioning of the rotor end cap 1 inside the rotor housing 4 reduces the axial and radial dimensional requirements of the in-wheel motor, since this construction does not require the provision of a connection structure (e.g. flange) of the larger-sized rotor end cap 1 on the rotor housing 4.

As shown in fig. 1 and 2, a stator assembly 7 of the in-wheel motor is mounted in the rotor housing 4, the rotor end cover 1 is provided with a through hole 8, the stator assembly 7 is provided with a stator shaft mounting hole 9, and the stator shaft mounting hole 9 is coaxial with the through hole 8.

More specifically, the stator assembly 7 does not rotate together with the wheel, but is driven to rotate by excitation (only the rotor housing 4 is shown in the figure), thereby rotating the wheel. The stator assembly 7 requires a stator shaft that passes through the stator shaft mounting hole 9 and the rotor assembly (including the rotor housing 4 and the rotor end cap 1) is in rotational engagement with the stator shaft via bearings 10.

The embodiment also provides a wheel side system, which comprises: a knuckle 12 and an in-wheel motor as described above, said in-wheel motor being connected to said knuckle 12. Because the rotor end cover 1 and the brake disc 2 are integrated into a whole, parts such as bolts and the like are saved, the structure is simpler, and the weight of the wheel is lighter.

As shown in fig. 1, 2, 3 and 5, the knuckle 12 in the present embodiment has a fixed shaft 13, and the fixed shaft 13 passes through the through hole 8 of the rotor end cover 1 of the in-wheel motor and the stator shaft mounting hole 9 of the stator assembly 7 of the in-wheel motor.

More specifically, in the prior art, the hub motor itself is provided with a stator shaft, and the knuckle 12 and the hub motor are connected by adopting a hub bearing, and the hub bearing realizes the relative rotation between the wheel and the knuckle, which also causes problems of too many parts and too large unsprung mass. In the present embodiment, the fixed shaft 13 on the knuckle 12 simultaneously functions as a hub bearing and a stator shaft of the hub motor, and the hub motor does not need a separate stator shaft, so that the structure is simpler. The fixed shaft 13 may also be rotatably coupled to the rotor assembly using a bearing 10 and then locked by a nut 11. In other words, it is also considered that the stator shaft is integrated into the knuckle 12, and a separate hub bearing is no longer required, so that the number of parts is reduced and the mass is reduced. In operation, the hub motor itself rotates relative to the stator assembly 7, so that the wheel can rotate after the rotor housing 4 is connected to the hub 16 of the wheel.

After the brake disc 2 and the rotor end cover 1 are integrated together, the number of parts is reduced, and the assembly is convenient. Simultaneously, rotor assembly and stator assembly 7 relative motion, in-wheel motor cutting magnetism induction line can produce the moment of torsion, will this principle be applied to the braking, and in-wheel motor can provide certain braking force when the vehicle brakes, therefore the requirement to brake disc 2 and brake chuck 14 can reduce when the vehicle brakes, and brake disc 2 consequently can adopt less volume, brings bigger weight reduction effect for the wheel limit system.

The fixed shaft 13 and the knuckle 12 can be rigidly connected in various ways, for example, the fixed shaft 13 is integrally formed with the knuckle 12 or welded. Or the stationary shaft 13 may be detachably connected to the knuckle 12, such as by a threaded connection or an interference fit.

Because the fixed shaft 13 has the functions of the stator shaft and the hub bearing, parts are fewer, the assembly is more convenient, and the weight is lighter.

As shown in fig. 4, the knuckle 12 has a brake caliper mounting hole 15. After the bolts pass through the brake caliper mounting holes 15, a brake caliper 14 as shown in fig. 5 is mounted to the knuckle 12. The brake caliper 14 may also be attached to the knuckle 12 by staking or the like.

The present embodiment also provides a vehicle mounted with the in-wheel motor as described above, or with the wheel-side system as described above.

As shown in fig. 6, after the hub motor is assembled, the hub 16 of the wheel is assembled, and the fixed shaft 13 on the knuckle 12 passes through the through hole 8 and the stator shaft mounting hole 9 and is locked by the nut 11. Therefore, the rotation of the rotor housing 4 of the in-wheel motor can drive the wheels to rotate, thereby driving the vehicle to run. During braking of the vehicle, the brake calipers 14 clamp the brake disc 2 to provide braking force, while the in-wheel motor itself is also able to provide a part of the braking force by its torque.

The foregoing embodiments mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in consideration of brevity of line text, no further description is given here.

While certain specific embodiments of the application have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the application. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the application. The scope of the application is defined by the appended claims.

Claims

1. A wheel hub motor, comprising: the novel brake disc comprises a rotor end cover (1) and a brake disc (2), wherein the rotor end cover (1) and the brake disc (2) are integrated into a whole, and the rotor end cover (1) and the brake disc (2) are integrally formed or the rotor end cover (1) and the brake disc (2) are in interference fit.

2. The in-wheel motor according to claim 1, characterized in that the rotor end cap (1) has a neck (3), the neck (3) being an interference fit with the brake disc (2).

3. The in-wheel motor according to claim 1, further comprising a rotor housing (4), the rotor housing (4) being fixedly connected with the rotor end cap (1).

4. A hub motor according to claim 3, characterized in that the rotor housing (4) is integrally formed with the rotor end cap (1).

5. A hub motor according to claim 3, characterized in that the rotor end cap (1) is fixedly connected to an end face (5) of the rotor housing (4).

6. A hub motor according to claim 3, characterized in that the rotor end cap (1) is fixedly connected to the inner wall surface (6) of the rotor housing (4).

7. The in-wheel motor according to any one of claims 3 to 6, further comprising a stator assembly (7), the stator assembly (7) being mounted within the rotor housing (4), the rotor end cap (1) being open with a through hole (8), the stator assembly (7) having a stator shaft mounting hole (9), the stator shaft mounting hole (9) being coaxial with the through hole (8).

8. A wheel rim system, comprising: a steering knuckle (12) and an in-wheel motor as claimed in any one of claims 1 to 7, said in-wheel motor being connected to said steering knuckle (12).

9. Wheel rim system according to claim 8, characterized in that the knuckle (12) has a stationary shaft (13), which stationary shaft (13) passes through a through hole (8) of a rotor end cap (1) of the in-wheel motor and a stator shaft mounting hole (9) of a stator assembly (7) of the in-wheel motor.

10. Wheel rim system according to claim 9, characterized in that the fixed axle (13) is integrally formed with the knuckle (12) or that the fixed axle (13) is detachably connected with the knuckle (12).

11. The wheel rim system of claim 9, further comprising a brake caliper (14), the brake caliper (14) being mounted to the knuckle (12).

12. A vehicle, characterized in that the vehicle is mounted with an in-wheel motor as claimed in any one of claims 1 to 7 or with a wheel rim system as claimed in any one of claims 8 to 11.