CN211667063U

CN211667063U - Brake caliper

Info

Publication number: CN211667063U
Application number: CN202020311125.7U
Authority: CN
Inventors: 陈晓军; 郑瑞章; 陈庆林; 雷日起; 李明军
Original assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Current assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-10-13
Anticipated expiration: 2030-03-13

Abstract

The utility model discloses a brake caliper, including the calliper pincers body and piston, the piston slides and sets up in the pneumatic cylinder of this internal formation of calliper, the piston drives the friction disc assembly and removes, the pneumatic cylinder inner wall is equipped with the rectangular channel, be equipped with the rectangular seal circle with the radial outside contact of piston in the rectangular channel, a serial communication port, the rectangular channel front side is equipped with the chamfer, chamfer angle 30 +/-30', the chamfer is 0.5mm +/-0.05 mm along piston axial length, under 1MPa hydraulic pressure the compression capacity less than or equal to 25 mu m of friction disc assembly. The clearance between the rectangular sealing ring and the chamfer of the rectangular groove of the caliper body is reduced by adjusting the chamfer of the front side of the rectangular groove, so that the effect of reducing the required liquid amount is achieved; the amount of compression of the friction plate assembly is adjusted to reduce the compression and deformation of the resilient member to achieve the low fluid volume requirements of the caliper.

Description

Brake caliper

Technical Field

The utility model relates to an automobile brake device, in particular to brake caliper.

Background

The brake caliper of the disc brake mainly establishes hydraulic pressure by means of the sealing effect of the rectangular sealing ring, the piston and the caliper body to push the friction plate assembly to clamp the brake disc, so that braking torque is provided to decelerate or stop the automobile, after braking is finished, the piston returns under the driving of the rectangular sealing ring, a certain gap is generated between the friction plate assembly and the brake disc, normal rotation of the brake disc is guaranteed, and normal running or starting of the automobile is guaranteed.

With the increase of driving age and deep understanding of automobiles, the requirements of drivers on vehicle performance are continuously improved, and under the condition of meeting the functions of components, the drivers pay more and more attention to driving feeling. Good brake pedal feel is the essential condition of excellent vehicle, and the required liquid measure of calliper braking is one of the main factors that influence the footboard feel, optimizes and reduces the required liquid measure of calliper and can effectively optimize the footboard feel, if reduce the required liquid measure of calliper with wrong method and can bring the increase of driving drag and oil consumption, can cause the braking drift in serious time, causes the incident. The development of brake calipers with low fluid volumes required has therefore become a matter of optimization for every caliper manufacturer.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the prior art is not enough to be overcome, and a brake caliper with low required liquid amount is provided.

In order to solve the technical problem, the utility model discloses a following technical scheme realizes: brake caliper, including calliper pincers body and piston, the piston slides and sets up in the pneumatic cylinder of calliper internal formation, the piston drives the friction disc assembly and removes, the pneumatic cylinder inner wall is equipped with the rectangular channel, be equipped with the rectangle sealing washer with the radial outside contact of piston in the rectangular channel, its characterized in that, the rectangular channel front side is equipped with the chamfer, chamfer angle 30 ° ± 30', the chamfer is 0.5mm ± 0.05mm along the axial length of piston, under 1MPa hydraulic pressure the compression capacity of friction disc assembly is less than or equal to 25 μm.

The chamfer angle is 30 degrees, and the length of the chamfer along the axial direction of the piston is 0.5 mm.

The utility model has the advantages that: firstly, adjusting a chamfer on the front side of the rectangular groove to reduce a gap between the rectangular sealing ring and the chamfer of the rectangular groove of the caliper body, thereby achieving the effect of reducing the required liquid amount; and secondly, adjusting the compression amount of the friction plate assembly to reduce the compression and deformation of the elastic element to obtain the liquid amount required by the caliper.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial enlarged view of the present invention;

fig. 3 is a schematic view of a rectangular groove structure.

Detailed Description

Referring to the attached drawings, the brake caliper comprises a caliper body 3 and a piston 4, the piston 4 is arranged in a hydraulic cylinder formed in the caliper body 3 in a sliding mode, the piston 4 drives a friction plate assembly 2 to move, a rectangular groove 6 is formed in the inner wall of the hydraulic cylinder of the caliper body 3, a rectangular sealing ring 5 in contact with the outer side of the piston in the radial direction is arranged in the rectangular groove 6, and a chamfer 61 is arranged on the front side of the rectangular groove 6.

In the braking process, the brake hydraulic pressure in the caliper body 3 gradually rises, and the hydraulic pressure pushes the piston 4 and drives the friction plate assembly 2 to move, so that the gap between the friction plate assembly 2 and the brake disc 1 is eliminated. As the pressure continues to rise, the thrust of the piston 4 increases, the caliper body 3 deforms, the friction plate assembly 2 is compressed, and the piston 4 can continue to move to consume more brake fluid. In the whole process, the gap t between the rectangular sealing ring 5 and the rectangular groove chamfer of the caliper body 3 is also reduced until the gap is eliminated, which also consumes a part of the brake fluid.

In order to obtain the effect of low liquid amount required by the caliper, the chamfer angle is 30 degrees +/-30', the length of the chamfer along the axial direction of the piston is 0.5mm +/-0.05 mm, and the compression amount of the friction plate assembly 2 under the hydraulic pressure of 1MPa is less than or equal to 25 mu m.

Preferably, the chamfer angle is 30 °, and the length of the chamfer in the axial direction of the piston is 0.5 mm.

To demonstrate the above effect, the required liquid amount test was performed on the product before and after the modification, respectively. Under the hydraulic pressure of 1MPa, the average required liquid amount of 10 groups of data of calipers with the diameter of two cylinders of 43mm is 0.75ml for 10 sets of the existing products (before improvement); the average required liquid amount of 30 groups of data of the improved product 10 sets of calipers with the diameter of 43mm of two cylinders under the hydraulic pressure of 1MPa is 0.45 ml.

The test shows that the required liquid volume of calliper after the improvement reduces 45% than the required liquid volume before improving, has promoted calliper performance design and whole car footboard feel.

Claims

1. Brake caliper, including calliper pincers body and piston, the piston slides and sets up in the pneumatic cylinder of calliper internal formation, the piston drives the friction disc assembly and removes, the pneumatic cylinder inner wall is equipped with the rectangular channel, be equipped with the rectangle sealing washer with the radial outside contact of piston in the rectangular channel, its characterized in that the rectangular channel front side is equipped with the chamfer, chamfer angle 30 ° ± 30', the chamfer is 0.5mm ± 0.05mm along the axial length of piston, under the 1MPa hydraulic pressure the compression capacity of friction disc assembly is less than or equal to 25 μm.

2. Brake calliper according to claim 1, wherein the chamfer angle is 30 °, the chamfer having a length in axial direction of the piston of 0.5 mm.