CN211820490U

CN211820490U - Self-lubricating abrasion-resistant rear brake caliper piston

Info

Publication number: CN211820490U
Application number: CN202020426225.4U
Authority: CN
Inventors: 潘松辉; 潘菁
Original assignee: Dachang Automobile Parts Co ltd
Current assignee: Dachang Automobile Parts Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-10-30
Anticipated expiration: 2030-03-27

Abstract

The utility model discloses a braking pincers piston after self-lubricating is stand wear and tear belongs to automobile parts technical field, including the piston body, the piston body has one end open-ended piston chamber, the other end of piston body is provided with the assembly mouth, the piston chamber is the step form, and include first cavity, second cavity and third cavity, set up the air current hole that accesss to in the first cavity on the piston body outer wall, there is the cyclic annular oil storage tank of seting up along the circumference direction on the outer edge wall of first cavity, be provided with sealed lid on the port of cyclic annular oil storage tank, set up the first oil inlet pipeline who accesss to first cavity inner wall on the little internal diameter inner wall of cyclic annular oil storage tank, the sprue has been seted up on the big internal diameter inner wall of cyclic annular oil storage tank, be provided with the second that accesss to second cavity and third cavity inner wall respectively on the sprue and advance oil pipeline and third oil. The utility model discloses have the effect of self-lubricating, improved its wearability, reduced its maintenance cycle.

Description

Self-lubricating abrasion-resistant rear brake caliper piston

Technical Field

The utility model belongs to the technical field of automobile parts, especially, relate to a braking pincers piston after self-lubricating is stand wear and tear.

Background

A braking system for an automobile includes a front brake piston and a rear brake caliper piston that cooperate with a caliper.

The utility model discloses a chinese utility model patent of CN202851754U discloses a back braking pincers piston, piston hole on piston body and the piston body, the piston hole is the step, including wide portion and narrow portion, wear to be equipped with a gas vent between narrow portion and the piston body for guarantee the balance of the downthehole external pressure of piston, be equipped with the profile of tooth structure on the terminal surface in piston hole, be used for guaranteeing the balance of the downthehole external pressure of piston. However, the wear resistance of the rear brake caliper piston is weak, and after the rear brake caliper piston is used for a long time, the inner wall of the piston is abraded, so that the service life is shortened, and the rear brake caliper piston needs to be frequently maintained.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical problem who exists to the aforesaid, provide a back braking pincers piston with self-lubricating to improve its wearability, reduce its maintenance cycle.

The purpose of the utility model is realized like this: a self-lubricating wear-resistant rear brake caliper piston comprises a piston body, wherein the piston body is provided with a piston cavity with an opening at one end, the other end of the piston body is provided with an assembly opening, the piston cavity is step-shaped and comprises a first cavity, a second cavity and a third cavity, the inner diameters of the first cavity, the second cavity and the third cavity are sequentially increased from inside to outside, the outer wall of the piston body is provided with an airflow hole leading to the first cavity, the first cavity is provided with an outer edge wall, the outer edge wall of the first cavity is connected with the inner wall of the second cavity and the inner wall of the second cavity are connected with the inner wall of the third cavity through inclined steps, the outer edge wall of the first cavity is provided with an annular oil storage tank arranged along the circumferential direction, a sealing cover is arranged on a port of the annular oil storage tank, and a first oil inlet pipeline leading to the inner wall of the first cavity is arranged on the inner wall of the small inner diameter of, a main runner is arranged on the inner wall of the large inner diameter of the annular oil storage tank, and a second oil inlet pipeline and a third oil inlet pipeline which are respectively communicated with the second cavity and the inner wall of the third cavity are arranged on the main runner.

By adopting the technical scheme, because the first cavity space of the piston cavity of the traditional piston is larger and is connected with the second cavity through the inclined steps, the piston body is difficult to arrange an oil storage tank in the piston body, and the self-lubricating effect cannot be achieved; therefore, the utility model reduces the volume of the first cavity, so that an oil storage tank can be arranged on the outer edge wall of the first cavity, and a first oil inlet pipeline for lubricating the inner wall of the first cavity, a second oil inlet pipeline for lubricating the second cavity and a third oil inlet pipeline for lubricating the third cavity are arranged in the oil storage tank, so that the piston body can achieve the self-lubricating effect, thereby reducing the maintenance period; wherein, reduce the volume of first cavity, can also indirect improvement whole piston body's the cavity to and the compactness between the calliper.

The utility model discloses further set up to: the sprue includes the first runner that leans out the setting and follows the second runner that piston body axial direction set up, the second advance oil pipe way with the oil feed port of third oil pipe way all is located on the second runner.

Through adopting above-mentioned technical scheme, set up the mainstream way into first runner and second runner to with lathe work.

The utility model discloses further set up to: the inner wall of the port of the annular oil storage tank is provided with an installation groove which is radially and outwards opened, and the sealing cover is arranged in the installation groove.

Through adopting above-mentioned technical scheme, set up the mounting groove to improve the sealing performance of sealed lid.

The utility model discloses further set up to: and an annular assembling groove which is radially and outwards arranged is formed in the inner wall of the second cavity.

Through adopting above-mentioned technical scheme, through setting up annular assembly groove to be used for installing transmission assembly.

The utility model discloses further set up to: the end face of the piston body with the assembling opening is provided with a plurality of tooth grooves which are uniformly distributed along the circumferential direction.

By adopting the technical scheme, the tooth grooves are arranged to prevent the piston body from being attracted with the brake disc.

The utility model discloses further set up to: the assembly opening is fan-shaped structure, the assembly opening has four, and circumference evenly distributed in on the piston body, the inner wall of assembly opening with be provided with arc portion between the outer wall of piston body, arc portion comprises consecutive first arc surface, inclined plane and second arc surface, first arc surface with the second circular arc all with the inclined plane is tangent.

By adopting the technical scheme, the four assembling ports are arranged to improve the installation strength between the piston body and the brake disc; set up arc portion on the assembly opening, and arc portion is including consecutive first arc surface, inclined plane and second arc surface to be used for the increase cornerite, produce the burr when avoiding adding man-hour piston body.

The utility model has the advantages that: 1. the utility model discloses a reduce the volume of first cavity, and then can set up the oil storage tank on the outer wall of following of first cavity, and set up the first oil inlet pipeline that lubricates the inner wall of first cavity, the second oil inlet pipeline that lubricates the second cavity and the third oil inlet pipeline that lubricates the third cavity in the oil storage tank, and then make the piston body can reach the effect of self-lubricating, in order to reduce the maintenance cycle; 2. arranging the main flow channel into a first flow channel and a second flow channel so as to facilitate turning; 3. set up arc portion on the assembly opening, and arc portion is including consecutive first arc surface, inclined plane and second arc surface to be used for the increase cornerite, produce the burr when avoiding adding man-hour piston body.

Drawings

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

fig. 2 is a side view of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

the reference numbers in the figures are: 1. a piston body; 2. a piston cavity; 21. a first cavity; 22. a second cavity; 221. an annular assembly groove; 23. a third cavity; 3. an assembly port; 31. an arc-shaped portion; 311. a first arc surface; 312. a bevel; 313. a second arc surface; 4. a tooth socket; 5. an airflow aperture; 6. an annular oil storage tank; 61. A first oil inlet pipeline; 62. a second oil inlet pipeline; 63. a third oil inlet pipeline; 64. a first flow passage; 65. A second flow passage; 7. and (7) sealing the cover.

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:

a self-lubricating wear-resistant rear brake caliper piston is shown in figures 1 and 2 and comprises a piston body 1, wherein the piston body 1 is provided with a piston cavity 2 with one end open, the other end of the piston body 1 is provided with an assembling port 3 and a plurality of tooth grooves 4 which are uniformly distributed along the circumferential direction, the piston cavity 2 is step-shaped and comprises a first cavity 21, a second cavity 22 and a third cavity 23, the inner diameters of the first cavity 21 and the second cavity are sequentially increased from inside to outside, and the outer wall of the piston body 1 is provided with an airflow hole 5 leading to the inside of the first cavity 21;

the first cavity 21 is provided with an outer edge wall, the outer edge wall of the first cavity 21 is connected with the inner wall of the second cavity 22 and the inner wall of the second cavity 22 is connected with the inner wall of the third cavity 23 through inclined steps, the outer edge wall of the first cavity 21 is provided with an annular oil storage tank 6 which is arranged along the circumferential direction, a sealing cover 7 is arranged on a port of the annular oil storage tank 6, a first oil inlet pipeline 61 leading to the inner wall of the first cavity 21 is arranged on the inner wall of a small inner diameter of the annular oil storage tank 6, a main flow channel is arranged on the inner wall of a large inner diameter of the annular oil storage tank 6, and the main flow channel is provided with a second oil inlet pipeline 62 and a third oil inlet pipeline 63 which lead to the inner walls of the second cavity 22 and the third cavity.

Because the first cavity 21 of the piston cavity 2 of the traditional piston has a larger space and is connected with the second cavity 22 by an inclined step, the piston body 1 is difficult to arrange an oil storage tank in the piston body, and further the self-lubricating effect cannot be achieved; therefore, the utility model discloses reduce the volume of first cavity 21, and then can set up the oil storage tank on the outer wall of following of first cavity 21, and set up the first oil inlet pipeline 61 that carries out lubrication to the inner wall of first cavity 21, the second oil inlet pipeline 62 that carries out lubrication to second cavity 22 and the third oil inlet pipeline 63 that carries out lubrication to third cavity 23 in the oil storage tank, and then make piston body 1 can reach the effect of self-lubricating, in order to reduce the maintenance cycle; the volume of the first cavity 21 is reduced, and the tightness between the cavity of the whole piston body 1 and calipers can be indirectly improved; wherein, for improving lubricating efficiency, all set up two, and the one-to-one symmetry setting with sprue, first oil inlet pipe 61, second oil inlet pipe 62 and third oil inlet pipe 63 to this.

Preferably, the main flow passage includes a first flow passage 64 arranged obliquely outward and a second flow passage 65 arranged along the axial direction of the piston body 1, and the oil inlet ports of the second oil inlet pipeline 62 and the third oil inlet pipeline 63 are both located on the second flow passage 65. The primary flow channels are provided as a first flow channel 64 and a second flow channel 65 for machining with turning.

Preferably, the inner wall of the port of the annular oil storage tank 6 is provided with a mounting groove which is radially and outwards opened, and the sealing cover 7 is arranged in the mounting groove. By providing the mounting groove, the sealing performance of the sealing cover 7 is improved.

Preferably, the inner wall of the second cavity 22 has an annular mounting groove 221 opened radially outward for mounting the transmission assembly.

Optimally, as shown in fig. 2 and 3, the assembly opening 3 is of a fan-shaped structure, the number of the assembly openings 3 is four, the assembly openings are circumferentially and uniformly distributed on the piston body 1, an arc portion 31 is arranged between the inner wall of the assembly opening 3 and the outer wall of the piston body 1, the arc portion 31 is composed of a first arc surface 311, an inclined surface 312 and a second arc surface 313 which are sequentially connected, and the first arc surface 311 and the second arc are tangent to the inclined surface 312.

The four assembling ports 3 are arranged to improve the installation strength between the piston body 1 and the brake disc; set up arc portion 31 on assembly opening 3, and arc portion 31 includes consecutive first arc surface 311, inclined plane 312 and second arc surface 313 to be used for increasing the cornerite, produce the burr when avoiding adding man-hour piston body 1.

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 wear and tear back braking pincers piston of self-lubricating, includes piston body (1), piston body (1) has one end open-ended piston chamber (2), the other end of piston body (1) is provided with assembly mouth (3), piston chamber (2) are the step form, include first cavity (21), second cavity (22) and third cavity (23) that increase in proper order from inside to outside and internal diameter, seted up on piston body (1) outer wall and led to airflow hole (5) in first cavity (21), its characterized in that: the first cavity (21) is provided with an outer edge wall, the outer edge wall of the first cavity (21) is connected with the inner wall of the second cavity (22) and the inner wall of the second cavity (22) is connected with the inner wall of the third cavity (23) through inclined steps, the outer edge wall of the first cavity (21) is provided with an annular oil storage groove (6) which is arranged along the circumferential direction, a sealing cover (7) is arranged on the port of the annular oil storage tank (6), a first oil inlet pipeline (61) leading to the inner wall of the first cavity (21) is arranged on the inner wall with a small inner diameter of the annular oil storage tank (6), a main flow channel is formed in the inner wall of the large inner diameter of the annular oil storage tank (6), and a second oil inlet pipeline (62) and a third oil inlet pipeline (63) which respectively lead to the inner wall of the second cavity (22) and the inner wall of the third cavity (23) are arranged on the main flow channel.

2. A self-lubricating wear-resistant rear brake caliper piston according to claim 1, wherein: the sprue includes first runner (64) that outwards inclines to set up and follows second runner (65) that piston body (1) axial direction set up, second advance oil pipe way (62) with the oil feed port of third oil pipe way (63) all is located on second runner (65).

3. A self-lubricating wear-resistant rear brake caliper piston according to claim 1, wherein: the inner wall of the port of the annular oil storage tank (6) is provided with a mounting groove which is radially and outwards opened, and the sealing cover (7) is arranged in the mounting groove.

4. A self-lubricating wear-resistant rear brake caliper piston according to any one of claims 1-3, wherein: an annular assembling groove (221) which is radially and outwards arranged is formed in the inner wall of the second cavity (22).

5. A self-lubricating wear-resistant rear brake caliper piston according to any one of claims 1-3, wherein: the end face of the piston body (1) with the assembling opening (3) is provided with a plurality of tooth grooves (4) which are uniformly distributed along the circumferential direction.

6. A self-lubricating wear-resistant rear brake caliper piston according to any one of claims 1-3, wherein: assembly opening (3) are fan-shaped structure, assembly opening (3) have four, and circumference evenly distributed in on piston body (1), the inner wall of assembly opening (3) with be provided with arc portion (31) between the outer wall of piston body (1), arc portion (31) comprise consecutive first arc surface (311), inclined plane (312) and second arc surface (313), first arc surface (311) with the second circular arc all with inclined plane (312) are tangent.