CN213270800U

CN213270800U - Piston dust cover for brake assembly

Info

Publication number: CN213270800U
Application number: CN202022195143.6U
Authority: CN
Inventors: 符乐君; 呙波; 周欢齐; 王俊辉
Original assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Current assignee: Zhejiang Libang Hexin Automotive Brake System Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-25
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a piston dust cover for brake assembly, including the dust cover body, its characterized in that, the outer wall interference fit of dust cover body inner circle through first skeleton and piston, the inner wall interference fit of dust cover body outer lane through second skeleton and brake caliper body, the outer wall of piston is equipped with the first spacing step that is used for supporting dust cover inner circle lower extreme, and the skeleton can adopt mechanized automatic press fitting assembly, has avoided the dust cover not to assemble the quality hidden danger that brings in place; the assembly position of dust cover body inner circle can be restricted to first spacing step, has replaced the tradition form that sets up the recess on the piston, has reduced the process of piston processing recess, and piston wall thickness can be done thinly as far as possible under the prerequisite that satisfies the intensity requirement moreover, reduces the weight of piston effectively to realize the lightweight design of product.

Description

Piston dust cover for brake assembly

Technical Field

The utility model relates to a dust cover, in particular to piston dust cover for stopper assembly.

Background

The piston dust cover and the piston are important components of the brake caliper assembly, wherein the piston dust cover has the function of protecting the piston from dust, fine particles and the like in the working process, and the phenomenon that the piston is clamped and cannot normally work due to the fact that foreign matters enter is avoided; the piston functions to convert hydraulic pressure into thrust, and the main requirement is that the deformation affecting the function of the product cannot be generated under the stress condition.

In the prior art, as shown in fig. 1, an inner ring of a piston dust cover is in interference fit with a groove in an outer wall of a piston, the inner ring of the dust cover is limited and fixed by the groove of the piston, and an outer ring of the piston dust cover is in interference fit with a groove of a caliper body. The piston is not allowed to deform under the condition of bearing huge hydraulic pressure, so the wall thickness of the piston needs to be more than 3.5mm, a groove for preventing a dust cover of the piston from falling is also needed to be arranged, the depth of the groove needs to be more than 2mm, the maximum wall thickness of the piston is more than 5.5mm, the piston is overweight if necessary, a groove cutter needs to be used for processing the groove of the piston, and the design of the weight of a product and the processing technology cannot be optimal.

In addition, the piston dust cover occasionally appears the piston dust cover outer lane and does not assemble in place in the in-process of assembly, leads to sealed effect to reduce or lose, has the quality hidden danger.

SUMMERY OF THE UTILITY MODEL

In view of the technical problems existing in the background art, the technical problems solved by the present invention are to provide a piston dust cover for a brake assembly.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a piston dust cover for stopper assembly, includes the dust cover body, its characterized in that, the outer wall interference fit of dust cover body inner circle through first skeleton and piston, the inner wall interference fit of dust cover body outer lane through second skeleton and the brake caliper body, the outer wall of piston is equipped with the first spacing step that is used for supporting dust cover inner circle lower extreme.

And a second limiting step used for abutting against the lower end of the outer ring of the dust cover is arranged on the inner wall of the brake caliper body.

The height of the first limiting step is 0.5 +/-0.15 mm.

The piston outer wall is equipped with first recess, first recess is located dust cover body inner circle and piston interference fit department.

And a second groove is formed in the inner wall of the brake caliper body and is positioned at the interference fit position of the outer ring of the dust cover body and the brake caliper body.

The utility model has the advantages that: the inner ring of the dust cover body is in interference fit with the outer wall of the piston through the first framework, the outer ring of the dust cover body is in interference fit with the inner wall of the brake caliper body through the second framework, the frameworks can be assembled in a mechanical and automatic press-fitting mode, and the potential quality hazard caused by the fact that the dust cover is not assembled in place is avoided; the assembly position of dust cover body inner circle can be restricted to first spacing step, has replaced the tradition form that sets up the recess on the piston, has reduced the process of piston processing recess, and piston wall thickness can be done thinly as far as possible under the prerequisite that satisfies the intensity requirement moreover, reduces the weight of piston effectively to realize the lightweight design of product.

Drawings

FIG. 1 is an assembling structure of a conventional piston dust cover;

FIG. 2 is a schematic view of an assembly structure of the piston dust cover of the present invention;

FIG. 3 is a schematic structural view of the unassembled piston dust cover of FIG. 2;

fig. 4 is a partial enlarged view of the piston.

Detailed Description

As shown in figures 2 and 3, the piston dust cover for the brake assembly comprises a dust cover body 1, wherein an inner ring of the dust cover body 1 is in interference fit with an outer wall of a piston 3 through a first framework 2, the outer wall of the piston 3 is provided with a first limiting step 4 used for abutting against the lower end of the inner ring of the dust cover body 1, the first limiting step can limit the assembly position of the inner ring of the dust cover body, and the dust cover body is prevented from loosening when the piston moves back and forth.

In this embodiment, as shown in fig. 4, the height of the first limiting step 4 is 0.5 ± 0.15mm, the minimum wall thickness of the piston is 3.5mm, and the maximum wall thickness of the piston is reduced to 4.0mm by adding the height of the first limiting step, so that the wall thickness of the piston is reduced as much as possible on the premise of meeting the strength requirement, thereby effectively reducing the weight of the piston.

In order to prevent the dust cover body from falling off, the outer wall of the piston 3 is provided with a first groove 5, and the first groove 5 is positioned at the interference fit position of the inner ring of the dust cover body 1 and the piston 3.

The outer ring of the dust cover body 1 is in interference fit with the inner wall of the brake caliper body 7 through the second framework 6, the inner wall of the brake caliper body 7 is provided with a second limiting step 8 used for abutting against the lower end of the outer ring of the dust cover body 1, the inner wall of the brake caliper body 7 is provided with a second groove 9 for preventing the dust cover body 1 from falling off, and the second groove 9 is located at the interference fit position of the outer ring of the dust cover body 1 and the brake caliper body 7. The second limiting step can limit the assembly position of the outer ring of the dust cover body, and the dust cover body is prevented from loosening when the piston moves back and forth.

In the process of the axial back and forth movement of the piston, the inner ring and the outer ring of the dust cover body are fixed by the corresponding frameworks, and only the rubber part stretches out and draws back along with the piston, so that the dustproof and waterproof sealing effect of the dust cover body is realized.

Claims

1. The utility model provides a piston dust cover for stopper assembly, includes the dust cover body, its characterized in that, the outer wall interference fit of dust cover body inner circle through first skeleton and piston, the inner wall interference fit of dust cover body outer lane through second skeleton and the brake caliper body, the outer wall of piston is equipped with the first spacing step that is used for supporting dust cover inner circle lower extreme.

2. A piston dust cover for a brake assembly as claimed in claim 1, wherein the inner wall of the caliper body is provided with a second stop step for abutting against the lower end of the outer race of the dust cover.

3. A piston dust cover for a brake assembly as claimed in claim 1, wherein the first limit step height is 0.5 ± 0.15 mm.

4. A piston dust cover for a brake assembly as claimed in claim 1, wherein the piston outer wall is provided with a first recess at the interference fit of the dust cover body inner race with the piston.

5. The piston dust cover for a brake assembly as claimed in claim 2, wherein the inner wall of the caliper body is provided with a second groove, and the second groove is located at the interference fit position of the outer ring of the dust cover body and the caliper body.