CN202349047U - Dust cap for brake pistons - Google Patents
Dust cap for brake pistons Download PDFInfo
- Publication number
- CN202349047U CN202349047U CN201120469550XU CN201120469550U CN202349047U CN 202349047 U CN202349047 U CN 202349047U CN 201120469550X U CN201120469550X U CN 201120469550XU CN 201120469550 U CN201120469550 U CN 201120469550U CN 202349047 U CN202349047 U CN 202349047U
- Authority
- CN
- China
- Prior art keywords
- dust cap
- dust
- proof cover
- circular arc
- brake caliper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
A dust cap for brake pistons comprises a steel ring (2) which is located in the outer circular surface of the dust cap, and the outer circular surface of the dust cap is provided with a raised circular arc structure (1). The raised circular arc structure (1) is at the middle of the outer circular surface. The utility model solves the problem that in the conventional dust cap, a clearance can be caused by poor fitting, aging and abrasion to lead to oil leakage. When the dust cap is pressed to be mounted, the circular arc R of the outer circular surface is directly mounted in the groove of the spigot of a brake caliper, no force directly acts on the circular arc R and the groove as if an O-shaped ring sealing manner is adopted, the circular arc R plays a sealing role in the brake caliper, consequently, the oil leakage caused by the deformation of the dust cap and the brake caliper can be avoided, and moreover, the problem of oil leakage due to the clearance caused by the abrasion of the dust cap and the brake caliper can be solved.
Description
Technical field
The utility model relates to parts on a kind of automotive brake, and more particularly it is the brake plunger dust-proof cover.
Background technique
After brake plunger receives the brake fluid pressure effect, promote braking plate and move to brake disc, piston oral area cylindrical exposes, and when hydraulic coupling is cancelled, piston return backward under the effect of rectangular loop retreats in the brake caliper.Because the working environment dust is many, water stain many,, bring impurity in the return process for avoiding dust, impurity and water stain with the piston pollution; Be blended in the brake fluid; Influence braking effect, special at piston port exposed parts and brake caliper oral area design assembling piston dust-proof cover, dust-proof cover is a rubber product.The dust-proof cover cylindrical is press fit into brake caliper seam position; The dust-proof cover inner lip is contained in the piston outer port part groove; Produce pretightening force, when piston moves forward through force, the dust-proof cover distortion that is stretched along with piston moves; Cylindrical is adjacent to brake caliper all the time, and inner lip fits tightly all the time in piston oral area groove (as shown in Figure 1).
Existing dust-proof cover, the cylindrical position is smooth, includes steel ring, through being fitted in brake caliper seam position and interference fit, plays seal action.But the both is the arc surface contact, because the variation of both cylindricities causes to have the gap between the two, ageing of rubber and wear phenomenon also cause having the gap between the two, leakage of oil, oil impregnate situation (as shown in Figure 2) occur.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned existing disadvantages of background technology part, and a kind of brake plunger dust-proof cover is provided, and it can solve gap bad because of cooperating, aging, that wearing and tearing cause, the situation of oil impregnate occurs.
The purpose of the utility model reaches through following measure: the brake plunger dust-proof cover, and it comprises the steel ring that is positioned at the dust-proof cover periphery, it is characterized in that has protruding arc structure on the periphery of dust-proof cover.
In technique scheme, the arc structure of said convexity is at the middle part of periphery.
In technique scheme, rear portion, described dust-proof cover steel ring position is a structure thicker.
The utility model is with the thickening of rear portion, dust-proof cover steel ring position, on the periphery of dust-proof cover, increases protruding R circular arc, when press-fiting dust-proof cover; The R circular arc of periphery directly is contained in the groove of brake caliper seam, and both do not have the direct force effect, is equivalent to the form with the sealing of O type circle; The R circular arc plays seal action in brake caliper; The leakage of oil that can avoid both deformation to cause like this, and can solve the gap that both wearing and tearing cause, the oil impregnate situation appears.
Description of drawings
Fig. 1 is installed in the structural representation on the break for the utility model.
Fig. 2 is the structural representation of existing brake plunger dust-proof cover.
Fig. 3 is the structural representation of the utility model brake plunger dust-proof cover.
The arc structure of 1. convexities, 2. steel ring, 3. brake caliper groove among the figure.
Embodiment
Below in conjunction with the performance of accompanying drawing detailed description the utility model, but they do not constitute the qualification to the utility model, only do for example.Advantage through explanation the utility model will become clear more and understanding easily simultaneously.
Consulting Fig. 3 can know: the utility model brake plunger dust-proof cover; It comprises the steel ring 2 that is positioned at the dust-proof cover periphery; Protruding arc structure 1 is arranged on the periphery of dust-proof cover, and the arc structure 1 of said convexity is at the middle part of periphery, and rear portion, described dust-proof cover steel ring 2 position is a structure thicker.
Claims (3)
1. brake plunger dust-proof cover, it comprises the steel ring (2) that is positioned at the dust-proof cover periphery, it is characterized in that has protruding arc structure (1) on the periphery of dust-proof cover.
2. brake plunger dust-proof cover according to claim 1 is characterized in that the middle part of the arc structure (1) of said convexity at periphery.
3. according to claim 1 or 2 or described brake plunger dust-proof cover, it is characterized in that described dust-proof cover steel ring (2) rear portion, position is a structure thicker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120469550XU CN202349047U (en) | 2011-11-23 | 2011-11-23 | Dust cap for brake pistons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120469550XU CN202349047U (en) | 2011-11-23 | 2011-11-23 | Dust cap for brake pistons |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202349047U true CN202349047U (en) | 2012-07-25 |
Family
ID=46538054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120469550XU Expired - Lifetime CN202349047U (en) | 2011-11-23 | 2011-11-23 | Dust cap for brake pistons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202349047U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111386407A (en) * | 2017-11-28 | 2020-07-07 | 日立汽车系统株式会社 | Disk brake and piston protection cover |
-
2011
- 2011-11-23 CN CN201120469550XU patent/CN202349047U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111386407A (en) * | 2017-11-28 | 2020-07-07 | 日立汽车系统株式会社 | Disk brake and piston protection cover |
| CN111386407B (en) * | 2017-11-28 | 2022-01-28 | 日立安斯泰莫株式会社 | Disk brake and piston protection cover |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |