CN210800025U

CN210800025U - Light caliper piston

Info

Publication number: CN210800025U
Application number: CN201921761823.0U
Authority: CN
Inventors: 潘松辉; 潘菁
Original assignee: Dachang Automobile Parts Co ltd
Current assignee: Dachang Automobile Parts Co ltd
Priority date: 2019-10-19
Filing date: 2019-10-19
Publication date: 2020-06-19
Anticipated expiration: 2029-10-19

Abstract

The utility model discloses a light calliper piston belongs to automobile spare and accessory parts technical field, its technical scheme main points are including the piston body that has the cavity, this end of body of piston is equipped with the opening of intercommunication cavity, there is the buffer sleeve who slides in order to increase or reduce cavity seal volume along its radial direction is sealed in the cavity, buffer sleeve includes circular bottom plate, the annular seal cover on annular curb plate outer wall is located to annular curb plate and cover that sets up on circular bottom plate, be provided with the first spacing portion that restriction buffer sleeve stretches out the cavity on the open end inner wall of cavity, set up the exhaust hole that accesss to the cavity on the outer wall of piston body, buffer sleeve's annular curb plate is contradicted behind first spacing portion, a port that lies in cavity inner wall on the exhaust hole is near circular bottom plate and contactless annular curb plate. The utility model discloses the piston can play the effect of buffering to external clutch block when the atress removes, has reduced the degree of wear of clutch block to make braking process more steady.

Description

Light caliper piston

Technical Field

The utility model belongs to the technical field of auto parts, refer in particular to a light calliper piston.

Background

The caliper piston is a part for an automobile braking system, and the brake caliper is driven by hydraulic pressure so that a brake friction block on the caliper is connected with a brake disc, and braking is further realized.

During braking, the piston drives the brake friction block to gradually approach the brake disc, and the brake friction block and the brake disc are rigidly combined at the moment of contact, so that the vibration amplitude of the brake friction block is the strongest, local abrasion of the brake friction block is easily caused, the contact area between the brake friction block and the brake disc is reduced, and in the past, larger abrasion can be caused, and the brake performance and the driving safety are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a light calliper piston to the technical problem that above-mentioned exists, this piston can play the effect of buffering to external clutch blocks when the atress removes, has reduced the degree of wear of clutch blocks to make braking process more steady.

The purpose of the utility model is realized like this: a light caliper piston comprises a piston body with a cavity, wherein one end face of the piston body is an assembly face connected with an external friction block, the other end of the piston body is provided with an opening communicated with the cavity, a buffer sleeve which can slide in a sealing manner along the radial direction of the piston body to increase or reduce the sealing volume of the cavity is arranged in the cavity, the buffer sleeve comprises a circular bottom plate, an annular side plate arranged on the circular bottom plate and an annular sealing sleeve sleeved on the outer wall of the annular side plate, a first limiting part which limits the buffer sleeve to extend out of the cavity is arranged on the inner wall of the opening end of the cavity, an exhaust hole leading to the cavity is formed in the outer wall of the piston body, the annular side plate of the buffer sleeve abuts against the first limiting part, and one end opening of the exhaust hole, which is positioned on the inner wall of the cavity, abuts against the circular bottom plate and does not, the inner wall of the cavity is further provided with a second limiting part which limits the sliding of the buffer sleeve and then abuts against the bottom of the cavity.

By adopting the technical scheme, the assembly surface of the piston body is used for installing the friction block, the buffering sleeve in the piston body is used for connecting the hydraulic driving device, during braking, the hydraulic driving device can push the buffering sleeve to move towards the bottom of the cavity of the piston body, after the exhaust holes are sealed by the outer wall of the annular side plate, the circular bottom plate and the cavity can form a sealed cavity, at the moment, the piston body can move simultaneously with the buffering sleeve, after the friction block on the assembly surface is contacted with the brake disc, the friction block can bear a reaction force, the reaction force can enable the piston body to adjust the friction block under the action of the sealed cavity, so that the force borne by the outer surface of the friction block is uniform, when the hydraulic driving device gradually exerts external force on the buffering sleeve, the sealed cavity can be gradually compressed under the buffer of the sealed cavity, and the pressure of the friction block on the brake disc is gradually increased, the abrasion degree of the friction block is reduced, the braking process is more stable, the buffering sleeve returns to the initial position under the action of the hydraulic driving device after braking is stopped, and the piston body returns to the initial position under the pressure in the closed cavity.

The utility model discloses further set up to: annular seal cover has two and is divided into and is located annular sleeve's both ends, set up on the outer wall of annular curb plate and be located two annular oil storage tank between the annular seal cover, be provided with lubricating oil in the annular oil storage tank, buffer sleeve to slide in the cavity until conflicting in the in-process of cavity bottom, annular oil storage tank does not communicate the exhaust hole.

By adopting the technical scheme, the annular sealing sleeves are made of rubber materials, so that the sealing performance of the buffer sleeve in the cavity is further improved, and the annular sealing sleeves are arranged at the two ends of the buffer sleeve; for reducing the sliding friction force of buffering sleeve in the cavity, be provided with annular oil storage tank and pour into the annular lubricating oil that removes in the oil groove into this for this reason, come to lubricate the inner wall of cavity through lubricating oil, discharge from the exhaust hole for avoiding lubricating oil, consequently keep away from circular bottom plate setting with annular oil storage tank for buffering sleeve slides in the cavity until conflicting in this in-process of cavity bottom, and annular oil storage tank all does not communicate the exhaust hole.

The utility model discloses further set up to: there are many spacing posts along its circumference direction evenly distributed on the inner wall of annular curb plate, spacing post one end is located the port of annular curb plate, and the other end extends to on the circular bottom plate.

Through adopting above-mentioned technical scheme, set up spacing post in order to avoid the piston body to appear rotating when the braking.

The utility model discloses further set up to: the outer wall of the piston body is provided with an annular mounting groove which is arranged along the circumferential direction of the piston body and is close to the assembling surface, one port of the exhaust hole leads to the inner wall of the annular mounting groove, and the other port of the exhaust hole is positioned in the middle of the inner wall of the cavity.

Through adopting above-mentioned technical scheme, set up the annular mounting groove for the jack catch that installs on the clutch blocks on the fitting surface can the block in the annular mounting groove, thereby prevents that the clutch blocks from appearing droing.

The utility model discloses further set up to: the assembling surface is provided with a circular groove positioned in the center of the assembling surface and assembling grooves positioned at the outer edges of the circular groove, the assembling grooves are distributed uniformly, the depth of each assembling groove is greater than that of each circular groove, each assembling groove comprises a rectangular groove communicated with the corresponding circular groove and a fan-shaped groove communicated with the corresponding rectangular groove, and the ends of the rectangular groove and the fan-shaped groove are crossed by arc surfaces.

Through adopting above-mentioned technical scheme, the fitting surface of piston body is when the installation clutch blocks, through the cooperation of fitting groove and clutch blocks, can prevent that the clutch blocks from appearing rotating, for avoiding the fitting surface fish tail, for this reason the tip of fitting groove is crossed by the arc surface.

The utility model discloses further set up to: there is the bar groove that sets up along its radial direction on the assembly surface, bar groove one end communicate in circular slot and the other end accesss to on the outer wall of piston body, the bar groove have a plurality ofly and be radial evenly distributed in on the assembly surface.

Through adopting above-mentioned technical scheme, set up the bar groove to can make the clutch blocks tip can imbed the bar inslot, and then increase the area of contact between assembly surface and the clutch blocks, improve the installation intensity of clutch blocks.

The utility model discloses further set up to: the piston is characterized in that a chromium layer is electroplated on the surface of the piston body, and the thickness of the chromium layer is 10-20 microns.

By adopting the technical scheme, the chromium layer is electroplated on the surface of the piston body, so that the wear resistance and the corrosion resistance of the piston body are improved.

Drawings

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

fig. 2 is a schematic view of the internal structure of the present invention;

the reference numbers in the figures are: 1. a piston body; 11. an assembly surface; 111. a circular groove; 112. assembling a groove; 1121. a rectangular groove; 1122. a sector groove; 113. a strip-shaped groove; 12. a cavity; 13. a first limiting part; 14. an exhaust hole; 15. a second limiting part; 16. an annular mounting groove; 17. a chromium layer; 2. a buffer sleeve; 21. a circular base plate; 22. an annular side plate; 221. an annular oil storage tank; 23. an annular seal cartridge; 24. a limiting column.

Detailed Description

In order to make the technical solutions in the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings:

as shown in figures 1 and 2, the light caliper piston comprises a piston body 1 with a cavity 12, wherein the surface of the piston body 1 is electroplated with a chromium layer 17, the thickness of the chromium layer 17 is 10-20 μm, one end surface of the piston body 1 is an assembly surface 11 connected with an external friction block, and the other end of the piston body 1 is provided with an opening communicated with the cavity 12; wherein there is the buffer sleeve 2 along its radial direction sealed slip in order to increase or reduce cavity 12 seal volume in the cavity 12, buffer sleeve 2 includes circular bottom plate 21, set up annular curb plate 22 on circular bottom plate 21 and the annular seal cover 23 of cover on annular curb plate 22 outer wall, be provided with the first spacing portion 13 that restriction buffer sleeve 2 stretches out cavity 12 on the open end inner wall of cavity 12, set up the exhaust hole 14 that accesss to cavity 12 on the outer wall of piston body 1, buffer sleeve 2's annular curb plate 22 conflicts behind first spacing portion 13, a port that lies in the cavity 12 inner wall on the exhaust hole 14 tightly leans on circular bottom plate 21 and contactless annular curb plate 22, still be provided with the spacing portion 15 of second that conflicts in cavity 12 bottom after restriction buffer sleeve 2 slides on the cavity 12 inner wall, first spacing portion 13 and the spacing portion 15 of second are the annular structure.

The assembly surface 11 of the piston body 1 is used for installing a friction block, the buffering sleeve 2 in the piston body 1 is used for connecting a hydraulic driving device, during braking, the hydraulic driving device can push the buffering sleeve 2 to move towards the bottom of the cavity 12 of the piston body 1, when the outer wall of the annular side plate 22 seals the exhaust hole 14, the circular bottom plate 21 and the cavity 12 can form a closed cavity, at the moment, the piston body 1 and the buffering sleeve 2 can move simultaneously, after the friction block on the assembly surface 11 is contacted with a brake disc, the friction block can bear a reaction force, the reaction force can enable the piston body 1 to adjust the friction block under the action of the closed cavity, so that the force borne by the outer surface of the friction block is uniform, when the hydraulic driving device gradually exerts external force on the buffering sleeve 2, under the buffer of the closed cavity, the closed cavity can be gradually compressed, so that the pressure of the friction block on the brake disc is gradually increased, the abrasion degree of the friction block is reduced, the braking process is more stable, after braking is stopped, the buffering sleeve 2 returns to the initial position under the action of the hydraulic driving device, and the piston body 1 returns to the initial position under the pressure in the closed cavity.

The annular sealing sleeves 23 are divided into two ends located at the annular sleeve, the outer wall of the annular side plate 22 is provided with an annular oil storage groove 221 located between the two annular sealing sleeves 23, lubricating oil is arranged in the annular oil storage groove 221, the buffer sleeve 2 slides towards the cavity 12 until the buffer sleeve abuts against the bottom of the cavity 12, and the annular oil storage groove 221 is not communicated with the exhaust hole 14.

The annular sealing sleeve 23 is made of rubber materials, so that the sealing performance of the buffer sleeve 2 in the cavity 12 is further improved, and therefore the annular sealing sleeves 23 are arranged at the two ends of the buffer sleeve 2; in order to reduce the sliding friction force of the buffer sleeve 2 in the cavity 12, an annular oil storage groove 221 and lubricating oil injected into the annular oil removal groove are arranged, the inner wall of the cavity 12 is lubricated by the lubricating oil, and in order to avoid the lubricating oil from being discharged from the exhaust hole 14, the annular oil storage groove 221 is arranged away from the circular bottom plate 21, so that the annular oil storage groove 221 is not communicated with the exhaust hole 14 in the process that the buffer sleeve 2 slides in the cavity 12 until the buffer sleeve collides with the bottom of the cavity 12.

The mounting surface 11 is provided with a circular groove 111 at the center and a mounting groove 112 at the outer edge thereof, the mounting grooves 112 are distributed uniformly, the depth of the mounting groove 112 is greater than that of the circular groove 111, the mounting groove 112 comprises a rectangular groove 1121 communicated with the circular groove 111 and a fan-shaped groove 1122 communicated with the rectangular groove 1121, and the ends of the rectangular groove 1121 and the fan-shaped groove 1122 are crossed by an arc surface. When the friction block is installed on the assembling surface 11 of the piston body 1, the friction block can be prevented from rotating through the matching of the assembling groove 112 and the friction block, and in order to avoid the scratch of the assembling surface 11, the end part of the assembling groove 112 is crossed by an arc surface.

There is the bar groove 113 that sets up along its radial direction on the mounting surface 11, and bar groove 113 one end communicates on circular groove 111 and the outer wall that the other end accesss to piston body 1, and bar groove 113 has a plurality ofly and is radial evenly distributed on mounting surface 11. Set up bar groove 113 to can make in the clutch blocks tip can imbed bar groove 113, and then increased the area of contact between assembly surface 11 and the clutch blocks, improved the installation intensity of clutch blocks.

The utility model discloses further set up to, for avoiding piston body 1 to appear rotating when the braking, have along its circumference direction evenly distributed's many spacing posts 24 on the inner wall of annular curb plate 22 for this reason, spacing post 24 one end is located annular curb plate 22's port, and the other end extends to circular bottom plate 21 on.

The utility model discloses further set up to, have on the outer wall of piston body 1 and set up and be close to the annular mounting groove 16 of mounting surface 11 along its circumference direction, on one of them port of exhaust hole 14 accesss to the inner wall of annular mounting groove 16, another port of exhaust hole 14 is located the middle part of cavity 12 inner wall. The annular mounting groove 16 is provided so that the claw on the friction block mounted on the mounting surface 11 can be engaged in the annular mounting groove 16, thereby preventing the friction block from coming off.

The above embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained based on the above embodiments by those skilled in the art without any creative work shall fall within the protection scope of the present invention, 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 light calliper piston, includes piston body (1) that has cavity (12), one of them terminal surface of piston body (1) is assembly surface (11) that are connected with the outside clutch blocks, piston body (1) other end is equipped with the intercommunication the opening of cavity (12), its characterized in that: the piston is characterized in that a buffer sleeve (2) which hermetically slides along the radial direction of the cavity (12) to increase or reduce the sealing volume of the cavity (12) is arranged in the cavity (12), the buffer sleeve (2) comprises a circular bottom plate (21), an annular side plate (22) arranged on the circular bottom plate (21) and an annular sealing sleeve (23) sleeved on the outer wall of the annular side plate (22), a first limiting part (13) which limits the buffer sleeve (2) to extend out of the cavity (12) is arranged on the inner wall of an opening end of the cavity (12), an exhaust hole (14) leading to the cavity (12) is formed in the outer wall of the piston body (1), the annular side plate (22) of the buffer sleeve (2) abuts against the first limiting part (13), one port of the exhaust hole (14) on the inner wall of the cavity (12) abuts against the circular bottom plate (21) tightly and does not contact with the annular side plate (22), the inner wall of the cavity (12) is further provided with a second limiting part (15) which limits the buffer sleeve (2) to abut against the bottom of the cavity (12) after sliding.

2. A lightweight caliper piston according to claim 1, wherein: annular seal cover (23) have two and divide into and be located the both ends of buffer sleeve (2), seted up on the outer wall of annular curb plate (22) and be located two annular oil storage tank (221) between annular seal cover (23), be provided with lubricating oil in annular oil storage tank (221), buffer sleeve (2) to slide in cavity (12) until conflicting in the in-process of cavity (12) bottom, annular oil storage tank (221) do not communicate exhaust hole (14).

3. A lightweight caliper piston according to claim 1, wherein: there are many spacing posts (24) along its circumference direction evenly distributed on the inner wall of annular curb plate (22), spacing post (24) one end is located the port of annular curb plate (22), and the other end extends to on circular bottom plate (21).

4. A lightweight caliper piston according to claim 1, wherein: an annular mounting groove (16) which is arranged along the circumferential direction of the outer wall of the piston body (1) and is close to the assembling surface (11) is formed in the outer wall of the piston body, one port of the exhaust hole (14) leads to the inner wall of the annular mounting groove (16), and the other port of the exhaust hole (14) is located in the middle of the inner wall of the cavity (12).

5. A lightweight caliper piston according to claim 1, wherein: the assembling surface (11) is provided with a circular groove (111) located in the center of the assembling surface and assembling grooves (112) located at the outer edges of the circular groove (111), the assembling grooves (112) are distributed evenly, the depth of each assembling groove (112) is larger than that of the circular groove (111), each assembling groove (112) comprises a rectangular groove (1121) communicated with the circular groove (111) and a fan-shaped groove (1122) communicated with the rectangular groove (1121), and the ends of the rectangular groove (1121) and the fan-shaped groove (1122) are crossed by arc surfaces.

6. A lightweight caliper piston according to claim 5, wherein: there is strip groove (113) that sets up along its radial direction on assembly surface (11), strip groove (113) one end communicate in circular slot (111) and the other end lead to on the outer wall of piston body (1), strip groove (113) have a plurality ofly and be radial evenly distributed in on assembly surface (11).

7. A lightweight caliper piston according to claim 1, wherein: the piston is characterized in that a chromium layer (17) is electroplated on the surface of the piston body (1), and the thickness of the chromium layer (17) is 10-20 microns.