CN204458921U - A kind of Disk brake apparatus for electric vehicle axle assembly - Google Patents

Abstract

The utility model relates to a disc brake device for an electric vehicle bridge assembly, which comprises a half shaft (1), and a wheel hub (8) is fixedly connected to the outside of the half shaft, and is characterized in that: Connect to the brake disc (7), the brake disc is fixedly connected to the wheel hub, and a brake caliper (2) matching with the brake is connected to the brake disc (7), and the brake caliper includes the caliper body (3). Both sides of the caliper body (3) are slidably connected to a brake plate (5), and two brake plates (5) are correspondingly arranged on both sides of the brake disc (7), and each brake plate ( The inner surface of 5) is connected with the friction plate (6) that is matched with the brake disc (7), and a pressure wall (4) that is pressure-fitted with it is also connected to the outer side of one of the brake plates (5). The utility model has the advantages that the structure of the device is relatively simple, easy to maintain and replace friction plates, and it has good thermal stability, water stability and braking stability.

Description

A disc brake device for electric vehicle axle assembly

technical field

The utility model relates to a vehicle brake device, in particular to a disc brake device used for an electric vehicle bridge assembly.

Background technique

With the progress of society, the number of automobiles is increasing, and automobile exhaust has become one of the main sources of environmental pollution. As people's awareness of environmental protection continues to increase, and the inherent natural resources on the earth continue to decrease, it is necessary to look for alternatives to automobile fuels. Products have become an urgent problem to be solved. Therefore, the development of green and environmentally friendly electric vehicles is already the development direction of future automobiles, and it will occupy a place in the field of new energy vehicles in the future. The matching electric vehicle bridge is also urgently needed to be developed and developed.

At present, the braking device used for electric vehicles is mainly the drum brake of the rear axle wheel, but the common disadvantage of the drum brake is that the braking force stability is poor, the braking force varies greatly on different road surfaces, and it is not easy to control. The heat dissipation is not good, and the drum brake has thermal decay phenomenon, so the above-mentioned shortcomings of the drum brake device for electric vehicles are urgently needed at this stage, so as to stabilize the braking performance of electric vehicles, and finally achieve the purpose of being equipped with high-end passenger car products.

Utility model content

The purpose of this utility model is to solve the poor stability of the braking force existing in the drum brake device of the electric vehicle at the present stage. The braking force varies greatly on different road surfaces, which is not easy to control, and because of the poor heat dissipation, the drum brake There are disadvantages such as heat decay, and a disc brake device for electric vehicle axle assembly is proposed.

In order to achieve the above object, the utility model adopts the following technical solutions:

A disc brake device for an electric vehicle axle assembly, comprising a half shaft, a wheel hub is fixedly connected to the outer side of the half shaft, and is characterized in that a brake disc is also sleeved on the half shaft, The brake disc is fixedly connected to the hub, and a brake caliper is connected to the brake disc for braking. The brake caliper includes a caliper body, and a brake plate is slidably connected to both sides of the caliper body , the two brake plates are correspondingly arranged on both sides of the brake disc, and the inner surface of each brake plate is matched with the friction plate that is matched with the brake disc, and the outer side of one of the brake plates is also Attach a pressure wall with a pressure fit to it.

On the basis of above-mentioned technical scheme, can have following further technical scheme:

One side of the brake disc is provided with a flange.

The hub is provided with a stepped through hole that fits with the half shaft, and a first flange and a second flange are respectively provided on both sides of the outer wall of the hub, and a set of flanges are evenly distributed on the first flange. The first flange is slotted, and a group of second flange slots are evenly distributed on the second flange, and the first flange slots and the second flange slots are arranged in a dislocation.

The first flange is fixedly connected to the brake disc through a connecting piece.

A set of first mounting holes is evenly distributed on the first flange, a set of second mounting holes is evenly distributed on the second flange, and any two adjacent first mounting holes and second mounting holes are staggered by 30° angle set.

The hub adopts a double-flange structure, which has the following advantages:

1. The double-flange structure meets the offset size requirement of a single bridge, so that the center line of the tire is still located at the center of the hub bearing stop after the tire rim is installed.

2. The mounting holes of the double flanges are staggered into an angle of 30° to meet the requirements for assembling the connecting bolts of the brake disc, and save the material cost.

3. The two braking surfaces of the matching brake disc are connected in a columnar shape, which has good heat dissipation and simple outline structure, which makes the brake disc easy to process, and at the same time significantly reduces the dynamic balance of the brake disc.

4. The whole axle is lightweight. The wheel hub adopts the bifurcated double-flange structure, which meets the assembly requirements and saves the amount of materials used. It is 30KG lighter than the same type of rear axle. It reduces the weight while meeting the existing performance, and indirectly increases the weight. The mileage of the vehicle.

The utility model has the following advantages:

1. The thermal stability is better, because the brake disc has no frictional boosting effect on the friction pad, and because the size of the brake friction pad is not long, its working surface area is only 12% of the brake drum area ~6%, so the heat dissipation is better.

2. The water stability is good, because the unit pressure of the brake pad to the disc is high, it is easy to squeeze out the water, and at the same time, it is easy to shake off after being wetted by centrifugal force, and the pad wipes the disc. , Therefore, after the water comes out, it only needs to be braked once or twice to return to normal; while the drum brake needs to be braked more than ten times before returning to normal braking performance.

3. The braking stability is good. The braking torque of the disc brake has a linear relationship with the piston thrust and friction coefficient of the brake cylinder. In addition, there is no self-increasing effect, so the braking torque increases more slowly during the braking process. , Compared with drum brakes, it can ensure high braking stability.

4. The disc type friction lining is easier to replace after wear than the drum type friction lining, the structure is simpler, and the maintenance is easy.

Description of drawings

Fig. 1 is the basic structural representation of the utility model;

Fig. 2 is a side view of the hub;

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

Detailed ways

In order to make the utility model clearer, the device will be described in detail below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a disc brake device for electric vehicle axle assembly provided by the utility model includes a half shaft 1, and a wheel hub 8 is fixedly connected to the outside of the half shaft 1, and is characterized in that: A brake disc 7 is also sleeved on the half shaft 1, and a flange 7a is provided on one side of the brake disc 7, and the flange 7a is fixedly connected to the hub 8. A brake caliper 2 cooperating with its brake is connected on the moving disc 7, and the brake caliper 2 is a prior art, and it includes a caliper body 3, and a brake plate 5 is slidably connected to both sides of the caliper body 3, Two brake plates 5 are correspondingly arranged on both sides of the brake disc 7, and the inner surface of each brake plate 5 is connected with the friction plate 6 that is matched with the brake disc 7, and one of them brakes The outer side of the plate 5 is also connected to a pressure wall 4 which is press-fitted therewith.

As shown in Fig. 2 and Fig. 3, the hub 8 is provided with a stepped through hole 8a which fits with the half shaft 1, and a first flange 8b and a second flange are respectively provided on both sides of the outer wall of the hub 8. flange 8c, a group of first flange slots 8d are evenly distributed on the first flange 8b, and a group of second flange slots 8e are evenly distributed on the second flange 8b. The first method The flange slot 8d and the second flange slot 8e are misaligned. A group of first mounting holes 8f are uniformly distributed on the first flange 8b, a group of second mounting holes 8g are uniformly distributed on the second flange 8c, and any adjacent two first mounting holes 8f and second mounting holes The holes 8g are arranged in a staggered angle of 30°. The first flange 8b is fixedly connected to the flange 7a of the brake disc 7 through bolts.

Claims (5)

1. A disc brake device for an electric vehicle axle assembly, comprising a half shaft (1), and a wheel hub (8) is fixedly connected to the outside of the half shaft (1), characterized in that: A brake disc (7) is also sleeved on the half shaft (1), and the brake disc (7) is fixedly connected to the hub (8). Moving caliper (2), the brake caliper (2) includes a caliper body (3), and a brake plate (5) is slidingly fitted on both sides of the caliper body (3), and two brake plates (5) Correspondingly arranged on both sides of the brake disc (7), the inner surface of each brake plate (5) is connected to the friction plate (6) that is matched with the brake disc (7). The outer side of the brake plate (5) is also connected with a pressure wall (4) that is pressure-fitted with it. 2. A disc brake device for an electric vehicle axle assembly according to claim 1, characterized in that: one side of the brake disc (7) is provided with a flange (7a). 3. A disc brake device for an electric vehicle axle assembly according to claim 1 or 2, characterized in that: the hub (8) is provided with a socket socket with the half shaft (1). Matching stepped through holes (8a), first flanges (8b) and second flanges (8c) are respectively provided on both sides of the outer wall of the hub (8), and are evenly distributed on the first flange (8b) A set of first flange slots (8d), a set of second flange slots (8e) evenly distributed on the second flange (8b), the first flange slots (8d) and the second flange slots (8d) The second flange slot (8e) is misaligned. 4. A disc brake device for electric vehicle axle assembly according to claim 3, characterized in that: the first flange (8b) is fixedly connected to the brake disc (7 ). 5. A disc brake device for electric vehicle axle assembly according to claim 3, characterized in that: a group of first mounting holes (8f) are evenly distributed on the first flange (8b) ), a set of second mounting holes (8g) is evenly distributed on the second flange (8c), and any two adjacent first mounting holes (8f) and second mounting holes (8g) are arranged at an angle of staggered by 30°.