Rear drive axle assembly structure of hub motor

Abstract

According to a conventional new energy rear drive axle structure, power is provided by a motor and output after multi-stage mechanical transmission, so that energy loss is large, and effective utilization of electric energy is not facilitated; the utility model relates to a rear drive axle assembly structure of a wheel hub motor, which comprises a wheel hub motor assembly, a brake assembly and an axle housing welding assembly, and a stator shaft of the wheel hub motor penetrates through an inner hole of a half shaft of the brake assembly and is connected with an inner spline seat of the axle housing welding assembly; the hub motor is directly installed on the wheel and directly provides power for the wheel without passing through various transmission systems such as a speed reducer and a transmission shaft, energy loss can be avoided, the energy efficiency of an automobile is improved, friction of mechanical parts is reduced, energy consumption is reduced, and vibration and noise of the automobile can also be reduced. Meanwhile, due to the fact that the hub motor does not need to transmit power for driving, hidden dangers and risks caused by failures such as abrasion and breakage of various parts in a transmission system are avoided, safety is higher, and manufacturing cost and maintenance cost are lower.

Description

Technical Field

[0001] The utility model relates to a rear drive axle assembly structure of a hub motor, belonging to the technical field of machinery. Background Art

[0002] With the rapid rise of new energy vehicles, more and more types of new energy vehicles have flooded into the market. With the improvement of the national living standard, people's demands for the practicality and comfort of vehicles have also been continuously increasing.

[0003] Although there are a wide variety of new energy vehicle products on the market, the structures of drive axles are similar. In a conventional motor-driven rear axle, the motor and reducer assembly are heavy and located in the middle position, which increases the load on the axle housing. The conventional electric drive rear axle uses a multi-stage transmission from the motor to the reducer and then to the half shaft. Not only is the energy loss large, which is not conducive to the effective utilization of electric energy, but also the multi-stage transmission generates a large amount of noise, and there are risks of wear and fracture between each stage of transmission, with great potential safety hazards and relatively high maintenance costs. Summary of the Invention

[0004] The utility model designs a rear drive axle assembly structure of a hub motor, which is composed of a hub motor assembly (1), a braking assembly (2), and a bridge housing welding assembly (3). The braking assembly (2) is composed of a brake drum (6), a half shaft assembly (7), and a brake backing plate assembly (8). The bridge housing welding assembly (3) is composed of a bearing seat (9), an internal spline seat (10), and a bridge housing (12). The hub motor assembly (1) is installed on the brake drum (6), connected by wheel bolts (5), and tightened and fixed with wheel nuts (4). The brake backing plate assembly (8) of the braking assembly (2) is installed on the bearing seat (9) of the bridge housing welding assembly (3) and tightened and fixed with bolts. The hub motor stator shaft (11) of the hub motor assembly (1) passes through the central through hole of the half shaft assembly (7) and cooperates with the internal spline seat (10) of the bridge housing welding assembly (3). Different from the conventional motor-reducer drive type drive axle, the hub motor used for vehicle drive is directly installed on the rear axle wheel hub of the vehicle. Since the hub motor drive does not require power transmission, energy loss can be avoided, and the energy efficiency of the vehicle can be improved. At the same time, the hub motor drive can also reduce the friction of mechanical components, reduce energy consumption, and reduce the vibration and noise of the vehicle, improving the riding comfort. The hub motor drive does not require power transmission, so it can avoid potential safety hazards caused by wear and fracture of transmission components in the traditional transmission system. At the same time, the hub motor drive can also improve the stability and controllability of the vehicle. The multi-stage system transmission is cancelled, reducing the product cost and having lower maintenance costs. Description of the Drawings

[0005] Figure 1This is a schematic diagram of the present utility model. In the figure, 1 is the in-wheel motor assembly; 2 is the brake assembly; 3 is the welded axle housing assembly.

[0006] Figure 2 This is a partial cross-sectional view of the present utility model. In the figure, 4 is the wheel nut; 5 is the wheel bolt; 6 is the brake drum; 7 is the half shaft assembly; 8 is the brake backing plate assembly; 9 is the bearing housing; 10 is the internal spline seat; 11 is the stator shaft of the in-wheel motor; 12 is the axle housing. Specific embodiments

[0007] As Figure 1 shown, the present utility model is composed of an in-wheel motor assembly (1), a brake assembly (2), and a welded axle housing assembly (3).

[0008] As Figure 2 shown, the brake assembly (2) of the present utility model is composed of a brake drum (6), a half shaft assembly (7), and a brake backing plate assembly (8).

[0009] As Figure 2 shown, the welded axle housing assembly (3) of the present utility model is composed of a bearing housing (9), an internal spline seat (10), and an axle housing (12).

[0010] As Figure 2 shown, the in-wheel motor assembly (1) is directly installed on the brake drum (6) of the brake assembly (2). One end of the brake drum (6) is in contact with the in-wheel motor assembly (1), and the other end is in contact with the half shaft assembly (7). The wheel bolt (5) on the half shaft assembly (7) passes through the mounting holes of the brake drum (6) and the in-wheel motor assembly (1), and is tightened and fixed with the wheel nut (4); one end of the half shaft assembly (7) is in contact with the brake drum (6), and after installing bearings at the other end, it passes through the central hole of the brake backing plate assembly (8) and is installed in the bearing hole of the bearing housing (9); the end of the stator shaft (11) of the in-wheel motor has an external spline structure, passes through the central through hole of the half shaft assembly (7), and matches with the internal splines of the internal spline seat (10) of the welded axle housing assembly (3); the brake backing plate assembly (8) is installed on the bearing housing (9) of the welded axle housing assembly (3) and fixed with bolts; the present utility model designs a rear drive axle assembly structure of an in-wheel motor. The in-wheel motor assembly (1) directly provides power for the wheels without passing through various transmission systems such as a reducer and a drive shaft. Therefore, it can avoid energy loss, improve the energy efficiency of the vehicle, not only reduce the friction of mechanical components and lower energy consumption, but also reduce the vibration and noise of the vehicle; at the same time, since the in-wheel motor drive does not require power transmission, it avoids the potential risks brought by the wear, fracture and other failures of various components in the transmission system, has higher safety, and lower manufacturing cost and maintenance cost.

Claims

1. The structure of a rear drive axle assembly for a wheel hub motor, characterized in that: This structure consists of a hub motor assembly (1), a braking assembly (2), and a welded axle housing assembly (3). The braking assembly (2) consists of a brake drum (6), a half shaft assembly (7), and a brake backing plate assembly (8). The welded axle housing assembly (3) consists of a bearing housing (9), an internal spline housing (10), and an axle housing (12). The hub motor assembly (1) is installed on the brake drum (6), connected by wheel bolts (5), and tightened and fixed with wheel nuts (4). The brake backing plate assembly (8) of the braking assembly (2) is installed on the bearing housing (9) of the welded axle housing assembly (3) and tightened and fixed with bolts. The hub motor stator shaft (11) of the hub motor assembly (1) passes through the central through hole of the half shaft assembly (7) and mates with the internal spline housing (10) of the welded axle housing assembly (3).

2. The structure of the rear drive axle assembly of a wheel hub motor according to claim 1, characterized in that: The braking assembly (2) consists of a brake drum (6), a half shaft assembly (7), and a brake backing plate assembly (8). The brake backing plate assembly (8) is installed on the bearing housing (9) of the welded axle housing assembly (3) and fixed with bolts. One end of the half shaft assembly (7) is in contact with the brake drum (6), and after installing a bearing at the other end, it passes through the central hole of the brake backing plate assembly (8) and is inserted into the bearing hole of the bearing housing (9).

3. The structure of the rear drive axle assembly of a wheel hub motor according to claim 1, wherein: One end of the brake drum (6) is in contact with the hub motor assembly (1), and the other end is in contact with the half shaft assembly (7). The wheel bolts (5) on the half shaft assembly (7) pass through the mounting holes of the brake drum (6) and the hub motor assembly (1), and are tightened and fixed with wheel nuts (4).

4. The structure of the rear drive axle assembly of a hub motor according to claim 1, wherein: The welded axle housing assembly (3) consists of a bearing housing (9), an internal spline housing (10), and an axle housing (12). The internal spline housing (10) is welded inside the axle housing (12), and the bearing housing (9) is welded at the end of the axle housing (12).

5. The structure of the rear drive axle assembly of a wheel hub motor according to claim 1, wherein: The end of the hub motor stator shaft (11) has an external spline structure, passes through the central through hole of the half shaft assembly (7), and matches the internal splines of the internal spline housing (10) of the welded axle housing assembly (3).

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