CN212643375U

CN212643375U - Piston of rear brake caliper

Info

Publication number: CN212643375U
Application number: CN202020514792.5U
Authority: CN
Inventors: 潘松辉; 潘菁
Original assignee: Dachang Auto Parts Suzhou Co ltd
Current assignee: Dachang Auto Parts Suzhou Co ltd
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2021-03-02
Anticipated expiration: 2030-04-09

Abstract

The utility model discloses a back brake caliper piston, it has good lubricated wear-resisting effect, and its technical scheme main points are including the piston body, and the one end of piston body is the friction surface, and the other end of piston body is the piston bore, be equipped with a plurality of annulars on the periphery wall of piston body, be equipped with the oil storage sealing member in the annular, the oil storage sealing member includes annular fixed skeleton, and the radial cross-section of fixed skeleton is U type structure, and packs lubricating grease in the fixed skeleton, and the both sides of fixed skeleton all are equipped with the rubber gasket who contradicts with the annular inner wall, the utility model is suitable for a piston technical field.

Description

Piston of rear brake caliper

Technical Field

The utility model belongs to the technical field of the piston, refer in particular to a back brake caliper piston.

Background

The rear brake caliper piston is an important part in a brake caliper, sliding friction can be generated between the rear brake caliper piston and a brake caliper body during working of the rear brake caliper piston, the existing rear brake caliper piston is very simple in appearance structure and mainly of a cylindrical structure, one end of the rear brake caliper piston is provided with a piston hole, the other end of the rear brake caliper piston is used for abutting against a brake disc for braking, in the machining process, the requirement for the matching precision between the rear brake caliper piston and the caliper body is very high, if the gap between the rear brake caliper piston and the caliper body is too large, pressure relief is easily caused, the braking effect is reduced, if the gap is too small, the rear brake caliper piston and the caliper body are easily abraded, in order to solve the problems, the appearance structure of the rear brake caliper piston is improved, the rear brake caliper piston can achieve the effect of sufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a back brake caliper piston, it has good lubricated wear-resisting effect.

The purpose of the utility model is realized like this: the utility model provides a back brake caliper piston, includes piston body, and piston body's one end is the friction surface, and piston body's the other end is piston hole, its characterized in that: be equipped with a plurality of annulars on piston body's the periphery wall, be equipped with the oil storage sealing member in the annular, the oil storage sealing member includes annular fixed skeleton, and fixed skeleton's radial cross-section is U type structure, and packs lubricating grease in the fixed skeleton, and fixed skeleton's both sides all are equipped with the rubber gasket who contradicts with the annular inner wall.

By adopting the technical scheme, the rubber gaskets on the two sides are extruded and fixed in the ring grooves by the fixed frameworks, so that the rubber gaskets are prevented from deforming and losing efficacy due to stress in use, the radial section of the fixed frameworks is of a U-shaped structure, namely, the periphery of the fixed frameworks is provided with U-shaped grooves, lubricating grease is filled in the U-shaped grooves, and the lubricating property of the outer wall of the piston body during sliding is enhanced; in actual use, the biggest external diameter of rubber gasket is about to be greater than the external diameter of piston body, and the rubber gasket can play sealed effect in the use of being convenient for, avoids the outside seepage of lubricating oil, and the external diameter of fixed skeleton is about to be less than the external diameter of piston body for rubber gasket in use can play corresponding deformation effect, reduces the resistance when piston body slides.

The utility model discloses further set up to: the peripheral wall of the rubber gasket is embedded with a graphite sealing strip.

Through adopting above-mentioned technical scheme, the periphery wall of rubber gasket can set up the caulking groove, and the graphite sealing strip inlays in the caulking groove, through the setting of graphite sealing strip for the periphery wall of rubber gasket and braking pincers body working friction in-process can increase the wearability of rubber gasket periphery wall, improves the leakproofness simultaneously, avoids lubricating grease to ooze outward.

The utility model discloses further set up to: and the fixed framework is provided with an elastic gap.

Through adopting above-mentioned technical scheme, fixed skeleton adopts the metalwork that has certain elasticity, through the setting of elasticity breach for fixed skeleton can produce radial deformation, and is easy to assemble, and can rely on the elastic force of self to play the fixed action.

The utility model discloses further set up to: the friction surface comprises a plurality of ventilation grooves distributed at intervals in the circumferential direction, and a plurality of anti-skidding grooves are further arranged on the friction surface.

Through adopting above-mentioned technical scheme, the friction surface plays the effect of conflict friction for rely on frictional force to realize the braking, ventilative recess is used for avoiding producing the actuation phenomenon between friction surface and the brake disc

The utility model discloses further set up to: and a chromium coating is arranged on the surface of the piston body.

By adopting the technical scheme, the chromium coating can increase the hardness and the wear resistance of the surface of the piston body.

Drawings

FIG. 1 is a schematic view of a half-section structure of the present invention;

FIG. 2 is an enlarged view of the portion A of FIG. 1;

FIG. 3 is a schematic structural view of the fixing frame of the present invention;

fig. 4 is a schematic structural view of a sealing surface of the present invention;

the reference numbers in the figures are: 1. a friction surface; 2. a piston bore; 3. an oil storage seal; 4. fixing the framework; 5. a rubber gasket; 6. a graphite sealing strip; 7. an elastic notch; 8. a ventilation groove; 9. a protective tank.

Detailed Description

The invention will be further described in the following with reference to specific embodiments thereof, with reference to the accompanying drawings, in which figures 1 to 4:

the utility model provides a back brake caliper piston, includes piston body, and piston body's one end is friction surface 1, and piston body's the other end is piston hole 2, its characterized in that: be equipped with a plurality of annulars on piston body's the periphery wall, be equipped with oil storage sealing member 3 in the annular, oil storage sealing member 3 includes annular fixed skeleton 4, and fixed skeleton 4's radial cross-section is U type structure, and packs lubricating grease in the fixed skeleton 4, and fixed skeleton 4's both sides all are equipped with the rubber gasket 5 of contradicting with the annular inner wall.

By adopting the technical scheme, the rubber gaskets 5 on the two sides are extruded and fixed in the ring grooves by the fixed framework 4, so that the rubber gaskets 5 are prevented from deforming and losing efficacy due to stress in use, the radial section of the fixed framework 4 is of a U-shaped structure, namely, the U-shaped groove is arranged on the periphery of the fixed framework 4, lubricating grease is filled in the U-shaped groove, and the lubricating property of the outer wall of the piston body is enhanced when the piston body slides; in actual use, the biggest external diameter of rubber gasket 5 is about to be greater than the external diameter of piston body, and rubber gasket 5 can play sealed effect in the use of being convenient for, avoids the outside seepage of lubricating oil, and the external diameter of fixed skeleton 4 is about to be less than the external diameter of piston body for rubber gasket 5 in use can play corresponding deformation effect, reduces the resistance when piston body slides.

The utility model discloses further set up to: the peripheral wall of the rubber gasket 5 is embedded with a graphite sealing strip 6.

Through adopting above-mentioned technical scheme, the periphery wall of rubber gasket 5 can set up the caulking groove, and graphite sealing strip 6 inlays in the caulking groove, through the setting of graphite sealing strip 6 for the periphery wall of rubber gasket 5 and braking pincers body working friction in-process can increase the wearability of the periphery wall of rubber gasket 5, improves the leakproofness simultaneously, avoids lubricating grease to ooze outward.

The utility model discloses further set up to: and an elastic gap 7 is arranged on the fixed framework 4.

Through adopting above-mentioned technical scheme, fixed skeleton 4 adopts the metalwork that has certain elasticity, through the setting of elasticity breach 7 for fixed skeleton 4 can produce radial deformation, and is easy to assemble, and can rely on the elastic force of self to play the fixed action.

The utility model discloses further set up to: the friction surface 1 comprises a plurality of ventilation grooves 8 which are circumferentially distributed at intervals, and the friction surface 1 is also provided with a plurality of anti-skidding grooves.

Through adopting above-mentioned technical scheme, friction surface 1 plays the effect of conflict friction for rely on frictional force to realize the braking, ventilative recess 8 is used for avoiding producing the actuation phenomenon between friction surface 1 and the brake disc

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a back brake caliper piston, includes piston body, and piston body's one end is friction surface (1), and piston body's the other end is piston hole (2), its characterized in that: be equipped with a plurality of annulars on piston body's the periphery wall, be equipped with oil storage sealing member (3) in the annular, oil storage sealing member (3) are including annular fixed skeleton (4), and the radial cross-section of fixed skeleton (4) is U type structure, and packs lubricating grease in fixed skeleton (4), and the both sides of fixed skeleton (4) all are equipped with rubber gasket (5) of contradicting with the annular inner wall.

2. A rear brake caliper piston according to claim 1, wherein: the peripheral wall of the rubber gasket (5) is embedded with a graphite sealing strip (6).

3. A rear brake caliper piston according to claim 1, wherein: and an elastic gap (7) is arranged on the fixed framework (4).

4. A rear brake caliper piston according to claim 1, wherein: the friction surface (1) comprises a plurality of ventilation grooves (8) distributed circumferentially at intervals, and the friction surface (1) is also provided with a plurality of anti-skidding grooves.

5. A rear brake caliper piston according to claim 1, wherein: and a chromium coating is arranged on the surface of the piston body.