CN217814683U

CN217814683U - Piston of brake caliper

Info

Publication number: CN217814683U
Application number: CN202222308835.6U
Authority: CN
Inventors: 何代澄; 郑德金; 张海陆
Original assignee: CSG TRW Chassis Systems Co Ltd
Current assignee: CSG TRW Chassis Systems Co Ltd
Priority date: 2022-08-30
Filing date: 2022-08-30
Publication date: 2022-11-15
Anticipated expiration: 2032-08-30

Abstract

The utility model belongs to the technical field of automobile braking, and relates to a brake caliper piston, wherein a piston column is arranged in the inner cavity of the piston, one end of the piston column is flush with the end surface of the piston, which is contacted with a brake block, and the other end of the piston column is abutted against the bottom surface of the inner cavity of the piston; during braking, the piston end face and the piston column end face are in contact with the brake block, so that the contact area between the piston end face and the brake block is increased, the axial displacement of the piston is reduced, and the liquid amount required by the brake caliper assembly is reduced. The utility model discloses a set up the piston post in the one end of piston and brake pads contact, piston post terminal surface and piston end face contact with the brake pads jointly to increased the area of contact of piston end face and brake pads, and then can reduce brake pads friction material's deflection, made piston axial displacement reduce, realized reducing the required liquid measure of braking pincers assembly. Meanwhile, the piston column is additionally arranged inside the piston, so that the structural strength of the piston can be improved.

Description

Piston of brake caliper

Technical Field

The utility model belongs to the technical field of the car braking, a brake caliper piston is related to.

Background

The liquid amount required by the automobile brake caliper is used as one of important evaluation indexes of an automobile brake system, namely the volume of brake liquid required to be pressed into the caliper body by establishing certain hydraulic pressure in the caliper body, the parameter directly influences the braking effect of an automobile and the comfort of a driver, and the performance of the whole automobile mainly shows braking reaction time, braking distance, pedal feeling and the like. Therefore, the method has important significance for the research of the liquid amount required by the automobile brake caliper.

When the automobile brakes, the piston moves towards the brake block under the action of hydraulic pressure of the braking system, so that the end surface of the piston is in contact with the brake block and presses the brake block onto the brake disc, and the automobile stops moving. Patents CN216519316U and CN210003795U both show that increasing the contact area between the end face of the piston and the brake pad can reduce the deformation of the friction material of the brake pad, so as to reduce the axial displacement of the piston, thereby reducing the liquid amount required by the brake caliper assembly. However, in the conventional piston for reducing the liquid amount required by the automobile brake caliper, the boss is mainly arranged at one end of the piston, which is in contact with the brake block, so that the contact area between the end surface of the piston and the brake block is increased, and the liquid amount required by the automobile brake caliper is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to further increase the contact area between the piston end surface and the brake pad, and to provide a brake caliper piston.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a piston of brake caliper, there are piston columns in the cavity of the piston, one end of the said piston column is flush with end surface contacting with brake block on the said piston, another end is supported against the bottom surface of the piston cavity; during braking, the piston end face and the piston column end face are in contact with the brake block, so that the contact area between the piston end face and the brake block is increased, the axial displacement of the piston is reduced, and the liquid amount required by the brake caliper assembly is reduced.

Further, an inner cavity with an opening is also arranged in the piston column, and the opening on the piston column faces to the bottom of the inner cavity of the piston.

Further, a rubber ring is arranged between the piston column and the piston, the rubber ring is sleeved on the piston column, and the rubber ring is in interference fit with the piston and the piston column.

Furthermore, an annular groove is formed in the piston column and/or the piston, and the rubber ring is arranged in the annular groove.

Furthermore, the number of the rubber rings is a plurality, and the rubber rings are distributed along the axial direction of the piston.

The beneficial effects of the utility model reside in that:

the utility model provides a braking pincers piston sets up the piston post in the one end of piston and brake pads contact, piston post terminal surface and piston end face contact with the brake pads jointly to increased the area of contact of piston end face and brake pads, and then can reduce brake pads friction material's deflection, made piston axial displacement reduce, realized reducing the required liquid measure of braking pincers assembly. Meanwhile, the piston column is additionally arranged inside the piston, so that the structural strength of the piston can be improved.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention will be realized and attained by the specification which follows.

Drawings

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings, wherein:

fig. 1 is an overall schematic view of a piston of the present invention;

fig. 2 is a partially enlarged view of the rubber ring.

Reference numerals: 1-a piston; 2-a piston column; 3-rubber ring; 4-ring groove.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can be implemented or applied by other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the invention, the figures are shown in schematic form and not in pictorial form; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.

Referring to fig. 1-2, a piston of a brake caliper is disclosed, wherein a piston post 2 is disposed in an inner cavity of a piston 1, one end of the piston post 2 is flush with an end surface of the piston 1 contacting with a brake pad, and the other end of the piston post abuts against a bottom surface of the inner cavity of the piston; during braking, the piston end face and the piston column end face are in contact with the brake block, so that the contact area between the piston end face and the brake block is increased, the axial displacement of the piston is reduced, and the liquid amount required by the brake caliper assembly is reduced.

An inner cavity with an opening is also arranged in the piston column 2, and the opening on the piston column faces to the bottom of the inner cavity of the piston. Be provided with rubber ring 3 between piston post and the piston, 3 suits of rubber ring are on piston post 2, all adopt interference fit between rubber ring 3 and piston 1 and the piston post 2. An annular groove 4 is formed in the inner wall of the piston 1, and the rubber ring 3 is installed in the annular groove 4.

Wherein, the rubber circle 3 can set up a plurality ofly, distributes along the piston axial.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims

1. A brake caliper piston characterized by: a piston column is arranged in the inner cavity of the piston, one end of the piston column is flush with the end surface of the piston, which is contacted with the brake block, and the other end of the piston column is abutted against the bottom surface of the inner cavity of the piston; during braking, the piston end face and the piston column end face are in contact with the brake block, so that the contact area between the piston end face and the brake block is increased, the axial displacement of the piston is reduced, and the liquid amount required by the brake caliper assembly is reduced.

2. A brake caliper piston according to claim 1, wherein: an inner cavity with an opening is also arranged in the piston column, and the opening on the piston column faces to the bottom of the inner cavity of the piston.

3. A brake caliper piston according to claim 1, wherein: and a rubber ring is arranged between the piston column and the piston, the rubber ring is sleeved on the piston column, and the rubber ring is in interference fit with the piston and the piston column.

4. A brake caliper piston according to claim 3, wherein: and the piston column and/or the piston are/is provided with an annular groove, and the rubber ring is arranged in the annular groove.

5. A brake caliper piston according to claim 3, wherein: the rubber rings are distributed along the axial direction of the piston.