CN216812611U

CN216812611U - Automobile brake piston capable of being reset quickly

Info

Publication number: CN216812611U
Application number: CN202220726814.3U
Authority: CN
Inventors: 马建芳; 冯利萍
Original assignee: Hangzhou Carmi Auto Parts Co ltd
Current assignee: Hangzhou Carmi Auto Parts Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-06-24
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a quick-reset automobile brake piston which comprises a piston shell and a piston, wherein a piston cavity is arranged in the piston shell, a connecting pipe communicated with the piston cavity is arranged on one side of the piston shell, a convex edge is arranged at the tail end of the piston, a brake plate is fixed at the head end of the piston, an annular clamping groove is formed in the circle of an opening of the piston shell, an annular clamping ring is installed in the annular clamping groove, a plurality of first limiting grooves are formed in the circle of the outer wall of the annular clamping ring, thrust springs and limiting blocks are installed in the first limiting grooves, a second limiting groove is formed in the circle of the inner wall of the annular clamping groove, and a pressure spring positioned between the convex edge and the annular clamping ring is sleeved on the outer wall of the piston. Has the advantages that: after the hydraulic pressure is lost, the pressure spring deformed by the pressure can provide the reaction thrust to the convex edge, and meanwhile, the elastic return of the elastic rubber ring is matched, so that the piston is quickly returned, the friction of the brake disc is reduced, and the service life of the brake disc is prolonged; the piston is seamlessly attached to the piston cavity and the inner wall of the annular clamping ring, and stability is high through double limiting.

Description

Automobile brake piston capable of being reset quickly

Technical Field

The utility model belongs to the technical field of automobile brake pistons, and particularly relates to an automobile brake piston capable of being reset quickly.

Background

At present, hydraulic brakes of automobiles usually adopt disc brakes and drum brakes, wherein the disc brakes and the drum brakes are used for realizing the braking of the automobiles by utilizing the reciprocating motion of pistons. When the brake piston is used, the sealing ring is connected with the brake pump shell in a sealing mode, the piston is pushed under the action of hydraulic pressure to drive the brake pad to press the brake disc, friction torque is generated to brake, the sealing ring generates micro elastic deformation, and after the hydraulic pressure is lost, the sealing ring elastically returns to enable the piston to drive the brake pad to reset.

When the piston is braked, the elastic return capacity of the sealing ring is weakened after long-term friction use; the resetting is slow, so that additional friction of the brake block is caused, and the service life is shortened; meanwhile, a space of a sealing ring is reserved between the piston and the inner wall of the brake pump, and the structural stability is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a quick-reset automobile brake piston to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a car brake piston who resets fast, includes piston shell and piston, be equipped with one end open-ended piston chamber in the piston shell, piston shell one side is equipped with the intercommunication the connecting pipe in piston chamber, the piston end be equipped with the seamless protruding edge of hugging closely of piston intracavity wall, and the head end is located the piston chamber is outer and be fixed with the braking piece, piston shell opening round is equipped with ring groove, install annular snap ring in the ring groove, annular snap ring has seted up a plurality of first spacing grooves along the outer wall round, thrust spring and stopper are all installed to first spacing inslot, ring groove inner wall round seted up with the second spacing groove of first spacing groove one-to-one, piston outer wall cover have be located protruding edge with pressure spring between the annular snap ring.

Preferably, the piston shell is provided with a through hole in one-to-one correspondence with and communicated with the second limiting groove in one circle.

Preferably, the convex edge outer wall is provided with an annular groove in one circle, and a sealing rubber ring is arranged in the annular groove.

Preferably, the inner ring of the annular snap ring is tightly attached to the outer wall of the piston.

Preferably, annular snap ring part exposes outside the annular clamping groove, annular snap ring outer end inner circle is equipped with the annular groove, first annular mounting groove has been seted up in the annular groove, the piston outer wall be equipped with the second annular mounting groove that first annular mounting groove corresponds, first annular mounting groove with the built-in elastic rubber ring of second annular mounting groove, just elastic rubber ring with first annular mounting groove with sealed glue has been paintd to second annular mounting groove junction.

Preferably, a plurality of the first limiting grooves are equally arranged on the annular clamping ring.

Compared with the prior art, the utility model has the beneficial effects that:

1. after hydraulic pressure loses, protruding edge reaction thrust can be given to pressure spring that pressure warp, and the elasticity return of cooperation elastic rubber circle simultaneously makes the piston reset fast, reduces the friction of braking piece, prolongs its life.

2. The piston is seamlessly attached to the piston cavity and the inner wall of the annular clamping ring, and stability is high through double limiting.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A of the present invention;

FIG. 3 is a schematic view of the external structure of the present invention;

fig. 4 is a left side view structural schematic diagram of the piston housing, the piston, the annular snap ring and the elastic rubber ring of the utility model.

In the figure: 1. a piston housing; 2. a piston; 3. a piston cavity; 4. a connecting pipe; 5. a convex edge; 6. a brake pad; 7. an annular clamp groove; 8. an annular snap ring; 9. a first limit groove; 10. a thrust spring; 11. a limiting block; 12. a second limit groove; 13. a pressure spring; 14. a through hole; 15. sealing the rubber ring; 16. an annular groove; 17. a first annular mounting groove; 18. a second annular mounting groove; 19. an elastic rubber ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: referring to fig. 1-4, the present invention provides a technical solution: a quick reset automobile brake piston comprises a piston shell 1 and a piston 2, wherein a piston cavity 3 with an opening at one end is arranged in the piston shell 1, one side of the piston shell 1 is provided with a connecting pipe 4 communicated with the piston cavity 3, and hydraulic oil enters through the connecting pipe 4 to generate a hydraulic action to push the piston; the tail end of the piston 2 is provided with a convex edge 5 which is seamlessly attached to the inner wall of the piston cavity 3, so that hydraulic oil cannot leak from the piston cavity 3; the head end is positioned outside the piston cavity 3 and is fixed with a brake pad 6, so that the piston 2 is pushed to slide leftwards, the piston 2 drives the brake pad 6 to press a brake disc, and friction torque is generated to brake; an annular clamping groove 7 is formed in one circle of an opening of the piston shell 1, an annular clamping ring 8 is installed in the annular clamping groove 7, a plurality of first limiting grooves 9 are formed in the annular clamping ring 8 along one circle of the outer wall, thrust springs 10 and limiting blocks 11 are installed in the first limiting grooves 9, second limiting grooves 12 which are in one-to-one correspondence with the first limiting grooves 9 are formed in one circle of the inner wall of the annular clamping groove 7, and therefore the limiting blocks 11 can be pushed into the second limiting grooves 12 under the action of the thrust springs 1 and are clamped between the first limiting grooves 9 and the second limiting grooves 12, and the annular clamping ring 8 is locked in the annular clamping groove 7; the outer wall of the piston 2 is sleeved with a pressure spring 13 which is positioned between the convex edge 5 and the annular clamping ring 8, so that after hydraulic pressure is lost, the pressure spring 13 with deformed pressure can give a reaction thrust force of 5, and the piston 2 is reset.

Specifically, through holes 14 which are in one-to-one correspondence with and are communicated with the second limiting grooves 12 are formed in one circle on the outer wall of the piston shell 1; in this embodiment, when needing to dismantle, insert the member with whole through-holes 14 in step and all push back first spacing groove 9 with stopper 11, get off annular snap ring 8 and can take out piston 2.

Specifically, an annular groove is formed in one circle of the outer wall of the convex edge 5, and a sealing rubber ring 15 is installed in the annular groove; in the embodiment, the sealing performance between the convex edge 5 and the inner wall of the piston cavity 3 is further enhanced, and the anti-seepage effect is enhanced.

Specifically, the inner ring of the annular snap ring 8 is tightly attached to the outer wall of the piston 2; in this embodiment, the piston 2 is seamlessly attached to the inner wall of the annular snap ring 8, and is limited again, so that the stability during sliding is high.

Specifically, the annular snap ring 8 is partially exposed out of the annular snap groove 7, an annular groove 16 is formed in an inner ring of the outer end of the annular snap ring 8, a first annular mounting groove 17 is formed in the annular groove 16, a second annular mounting groove 18 corresponding to the first annular mounting groove 17 is formed in the outer wall of the piston 2, an elastic rubber ring 19 is arranged in the first annular mounting groove 17 and the second annular mounting groove 18, and sealant is coated at the joint of the elastic rubber ring 19 and the first annular mounting groove 17 and the second annular mounting groove 18; in this embodiment, thereby the elastic return of the elastic rubber ring 19 can be matched with the pressure spring 13 to further accelerate the quick return of the piston 2, and the outer ring and the inner ring of the elastic rubber ring 19 are respectively stuck in the first annular mounting groove 17 and the second annular mounting groove 18, so that the fixing effect is good.

Specifically, the first limit grooves 9 are equally spaced on the annular snap ring 8; in this embodiment, the first limiting groove 9 can correspond to different second limiting grooves 12, so that the installation is convenient.

For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.

The working principle is as follows: when the brake is used, after hydraulic oil enters through the connecting pipe 4, hydraulic acting force is generated to push the piston 2 to slide leftwards, the piston 2 drives the brake pad 6 to press a brake disc, friction torque is generated to brake, after the hydraulic pressure is lost, the pressure spring 13 with pressure deformation can provide reaction thrust for the convex edge 5, and meanwhile, the elastic return of the elastic rubber ring 19 is matched, so that the piston 2 is quickly reset, the friction of the brake pad 6 is reduced, and the service life of the brake pad is prolonged; the piston 2 is seamlessly attached to the piston cavity 3 and the inner wall of the annular clamping ring 8, and the stability is high through double limiting; when the piston 2 needs to be disassembled, the elastic rubber ring 19 is taken down, all the through holes 14 are synchronously inserted into the rod pieces, the limiting blocks 11 are all pressed back into the first limiting grooves 9, and the annular clamping rings 8 are taken off, so that the piston 2 can be taken out.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a car brake piston that resets fast, includes piston housing (1) and piston (2), its characterized in that, be equipped with one end open-ended piston chamber (3) in piston housing (1), piston housing (1) one side is equipped with the intercommunication connecting pipe (4) in piston chamber (3), piston (2) end be equipped with protruding edge (5) that piston chamber (3) inner wall is seamless hugs closely, and the head end is located piston chamber (3) are outer and be fixed with braking piece (6), piston housing (1) opening round is equipped with ring groove (7), install annular snap ring (8) in ring groove (7), a plurality of first spacing grooves (9) have been seted up along the outer wall round in annular snap ring (8), all install thrust spring (10) and stopper (11) in first spacing groove (9), ring groove (7) inner wall round set up with the second spacing groove (9) one-to-one The limiting groove (12), piston (2) outer wall cover has and is located protruding edge (5) with pressure spring (13) between annular snap ring (8).

2. The quick-return automobile brake piston according to claim 1, wherein a circle of the outer wall of the piston housing (1) is provided with through holes (14) which are in one-to-one correspondence and communication with the second limiting grooves (12).

3. The quick-return automobile brake piston according to claim 1, wherein a ring groove is formed in one circle of the outer wall of the convex edge (5), and a sealing rubber ring (15) is installed in the ring groove.

4. The quick-return automobile brake piston according to claim 1, characterized in that the inner ring of the annular snap ring (8) is tightly attached to the outer wall of the piston (2).

5. The quick-reset automobile brake piston according to claim 1, wherein the annular snap ring (8) is partially exposed out of the annular snap ring (7), an annular groove (16) is formed in an inner ring of an outer end of the annular snap ring (8), a first annular mounting groove (17) is formed in the annular groove (16), a second annular mounting groove (18) corresponding to the first annular mounting groove (17) is formed in an outer wall of the piston (2), an elastic rubber ring (19) is arranged in the first annular mounting groove (17) and the second annular mounting groove (18), and a sealant is coated at a joint of the elastic rubber ring (19) and the first annular mounting groove (17) and the second annular mounting groove (18).

6. The quick-return automotive brake piston according to claim 1, characterized in that a plurality of said first limit grooves (9) are equally spaced on said annular snap ring (8).