CN211852610U

CN211852610U - Piston assembly for automobile brake calipers

Info

Publication number: CN211852610U
Application number: CN202020461725.1U
Authority: CN
Inventors: 辜慧荣; 施剑波
Original assignee: Zhejiang Decai Brake System Co ltd
Current assignee: Zhejiang Decai Brake System Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-11-03
Anticipated expiration: 2030-04-01
Also published as: WO2021196471A1

Abstract

The utility model provides a piston assembly for car brake caliper belongs to auto-parts technical field. It has solved the too big problem of current screw rod wearing and tearing. This a piston assembly for car brake caliper includes piston main part and the screw rod that stretches into in the piston main part, be provided with the movable block that links firmly mutually with the screw rod in the piston main part, the movable block links firmly mutually through the double-screw bolt that an axial runs through the movable block and wears into in the screw rod with the screw rod, oil storage chamber one has transversely been seted up on the bottom face of screw rod, through the sealed oil storage chamber one of double-screw bolt, the oil outlet that a plurality of evenly distributed and be linked together with oil storage chamber one has been seted up on the periphery wall that the screw rod is located oil storage chamber one, oil storage chamber two has transversely been seted up on the bottom face of double-screw bolt, the oil filler point has transversely been seted up to the up end of double-screw bolt. The utility model has the advantages of lubricated effect and reduce wearing and tearing.

Description

Piston assembly for automobile brake calipers

Technical Field

The utility model belongs to the technical field of auto-parts, a piston assembly for car brake caliper is related to.

Background

The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine, to mount a brake shoe, belt or disc on the machine base, to generate a braking torque under the action of external force, i.e. a mechanical braking device capable of slowing down the speed, also called a retarder.

However, a screw rod in the existing automobile rear brake caliper piston assembly is abraded greatly in the rotating process, so that the braking effect is reduced and is difficult to control, the speed of an automobile cannot be controlled reasonably, and when the automobile is braked suddenly, the situation of wheel locking is easy to occur, so that the automobile is decelerated untimely, a major traffic accident occurs, and potential safety hazards are brought to driving of people.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a brake caliper piston assembly who has lubricated effect and reduce wearing and tearing.

The purpose of the utility model can be realized by the following technical proposal: a piston assembly for automobile brake calipers comprises a piston main body and a screw rod extending into the piston main body, wherein a moving block fixedly connected with the screw rod is arranged in the piston main body, and is characterized in that the moving block and the screw rod are fixedly connected through a stud axially penetrating through the moving block and penetrating into the screw rod, a first oil storage cavity for the stud to extend into and filled with lubricating oil is transversely formed in the bottom end face of the screw rod, the first oil storage cavity is sealed through the stud, a plurality of oil outlets which are uniformly distributed and communicated with the first oil storage cavity are formed in the peripheral wall of the screw rod at the first oil storage cavity, a second oil storage cavity communicated with the first oil storage cavity is transversely formed in the bottom end face of the stud, an oil filling hole communicated with the second oil storage cavity is transversely formed in the upper end face of the stud, and a sealing oil filling mechanism for sealing the oil filling hole and facilitating adding of the lubricating oil is arranged at the oil filling hole, and a limit ring sleeve which is fixedly connected with the stud and used for the position of the existing oil injection sealing mechanism is also arranged in the stud.

In the above piston assembly for an automobile brake caliper, the number of the oil outlet holes is 2-4.

In the piston assembly for the automobile brake caliper, the length A of the first oil storage cavity is 6-8cm, the length B of the stud in the oil storage cavity is 3-3.5cm, and the length C of the second oil storage cavity is 3.5-4 cm.

In foretell a piston assembly for car brake caliper, sealed oiling mechanism constitute by sealed ball, left backing plate, right backing plate and set up the buffer spring between left backing plate and right backing plate, sealed ball set up between the tank bottom surface in right backing plate and oil storage chamber two, the double-screw bolt in the junction of notes oilhole and sealed ball seted up with sealed ball matched with circular-arc conical surface, right backing plate on set up the through-hole that a plurality of and oil storage chamber two phases communicate along its circumferencial direction, the middle part of left backing plate also set up the through-hole that communicates with oil storage chamber two phases, and the left end face and the spacing ring cover of left backing plate inconsistent.

In the above piston assembly for the automobile brake caliper, a sealing plug fixedly connected with the stud and used for sealing the oil injection opening is arranged at the oil injection opening of the stud located at the oil injection hole.

Compared with the prior art, this a piston assembly for car brake caliper has following advantage:

1. the moving block is fixedly connected with the screw rod through a stud which axially penetrates through the moving block and penetrates into the screw rod, a first oil storage cavity into which the stud extends and is filled with lubricating oil is transversely formed in the bottom end face of the screw rod, the first oil storage cavity is sealed through the stud, a plurality of oil outlet holes which are uniformly distributed and communicated with the first oil storage cavity are formed in the outer peripheral wall of the screw rod at the first oil storage cavity, and a second oil storage cavity communicated with the first oil storage cavity is transversely formed in the bottom end face of the stud;

2. the oil filling hole that communicates with oil storage chamber two phase is transversely seted up to the up end of double-screw bolt, and the position that is located oil filling hole department in the double-screw bolt is provided with the sealed oiling mechanism that is used for sealed oiling hole and is convenient for add lubricating oil, still is provided with in the double-screw bolt and links firmly mutually with the double-screw bolt and be used for the spacing ring cover of present sealed oiling mechanism position, and the setting of above-mentioned structure is convenient for fill after lubricating oil is empty, can not cause the leakage simultaneously again.

Drawings

FIG. 1 is a schematic cross-sectional view of the piston assembly for an automotive brake caliper.

FIG. 2 is an enlarged view of circle A of FIG. 1 of the piston assembly for an automotive brake caliper.

In the figure, 1, a piston body; 2. a screw; 3. a moving block; 4. a stud; 5. a first oil storage cavity; 6. an oil outlet hole; 7. a second oil storage cavity; 8. an oil filler hole; 9. a sealing oiling mechanism; 10. a spacing ring sleeve; 11. sealing the ball; 12. a left pad plate; 13. a right base plate; 14. a buffer spring; 15. a through hole; 16. and (6) sealing the plug.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in figures 1 and 2, the piston assembly for the automobile brake caliper comprises a piston main body 1 and a screw rod 2 extending into the piston main body 1, wherein a moving block 3 fixedly connected with the screw rod 2 is arranged in the piston main body 1, a plane bearing matched with the screw rod 2 and fixedly connected with the piston main body 1 is arranged in the piston main body 1, a screw sleeve matched with the plane bearing is arranged on the screw rod 2 and positioned at the plane bearing, a vertically arranged exhaust through hole is also arranged in the piston, the exhaust through hole of a valve in the piston main body 1 is positioned at an air outlet and is horn-shaped, the moving block 3 is fixedly connected with the screw rod 2 through a stud 4 axially penetrating through the moving block 3 and penetrating into the screw rod 2, the circle centers of the screw rod 2 and the stud 4 are positioned on the same horizontal plane, an oil storage cavity I5 for the stud 4 to extend into and filled with lubricating oil is transversely arranged on the bottom end surface of the screw rod 2, the outer peripheral wall of the screw 2 at the first oil storage cavity 5 is provided with a plurality of oil outlet holes 6 which are uniformly distributed and communicated with the first oil storage cavity 5, the bottom end face of the stud 4 is transversely provided with a second oil storage cavity 7 communicated with the first oil storage cavity 5, the upper end face of the stud 4 is transversely provided with an oil filling hole 8 communicated with the second oil storage cavity 7, a sealing oil filling mechanism 9 which is used for sealing the oil filling hole 8 and is convenient for adding lubricating oil is arranged at the oil filling hole 8 in the stud 4, a spacing ring sleeve 10 which is fixedly connected with the stud 4 and is used for the position of the existing sealing oil filling mechanism 9 is also arranged in the stud 4, the spacing ring sleeve 10 is connected with the stud 4 through thread fit or fixedly connected through a pin shaft in a penetrating way, the sealing oil filling mechanism 9 consists of a sealing ball 11, a left base plate 12, a right base plate 13 and a buffer spring 14 arranged between the left base plate 12 and the right base plate 13, the sealing, the joint of the oil injection hole 8 in the stud 4 and the sealing ball 11 is provided with an arc conical surface matched with the sealing ball 11, the right base plate 13 is provided with a plurality of through holes 15 communicated with the second oil storage cavity 7 along the circumferential direction, the middle part of the left base plate 12 is also provided with a through hole 15 communicated with the second oil storage cavity 7, the left end surface of the left base plate 12 is abutted to the stop ring sleeve 10, and the diameter of the through hole 15 positioned on the left base plate 12 is larger than that of the through hole 15 positioned on the right base plate 13.

As a preferred structure, the number of the oil outlet holes 6 is 2-4.

As a preferable structure, the length A of the first oil storage cavity 5 is 6-8cm, the length B of the stud 4 in the oil storage cavity is 3-3.5cm, and the length C of the second oil storage cavity 7 is 3.5-4 cm.

In more detail, in order to better prevent the lubricating oil from leaking from the oil filling hole 8, the stud 4 is provided with a sealing plug 16 fixedly connected with the stud 4 and used for sealing the oil filling opening at the oil filling opening of the oil filling hole 8.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A piston assembly for automobile brake calipers comprises a piston main body (1) and a screw rod (2) extending into the piston main body (1), wherein a moving block (3) fixedly connected with the screw rod (2) is arranged in the piston main body (1), and is characterized in that the moving block (3) is fixedly connected with the screw rod (2) through a stud (4) axially penetrating through the moving block (3) and penetrating into the screw rod (2), an oil storage cavity I (5) for the stud (4) to extend into and be filled with lubricating oil is transversely arranged on the bottom end face of the screw rod (2), the oil storage cavity I (5) is sealed through the stud (4), a plurality of oil outlet holes (6) which are uniformly distributed and communicated with the oil storage cavity I (5) are arranged on the outer peripheral wall of the screw rod (2) at the oil storage cavity I (5), an oil storage cavity II (7) communicated with the oil storage cavity I (5) is transversely arranged on the bottom end face of the stud (4), oil filler point (8) that are linked together with oil storage chamber two (7) are transversely seted up to the up end of double-screw bolt (4), double-screw bolt (4) in be located oil filler point (8) and locate to be provided with sealed oiling mechanism (9) that are used for sealed oiling hole (8) and be convenient for add lubricating oil, double-screw bolt (4) in still be provided with and link firmly and be used for spacing ring cover (10) of present sealed oiling mechanism (9) position mutually with double-screw bolt (4).

2. Piston assembly for vehicle brake calipers according to claim 1, wherein the number of oil outlet holes (6) is 2-4.

3. A piston assembly for brake calipers of automobiles according to claim 1, wherein the length a of the first oil storage chamber (5) is 6-8cm, the length B of the stud (4) located in the oil storage chamber is 3-3.5cm, and the length C of the second oil storage chamber (7) is 3.5-4 cm.

4. A piston assembly for an automotive brake caliper according to claim 1, the sealing oiling mechanism (9) consists of a sealing ball (11), a left base plate (12), a right base plate (13) and a buffer spring (14) arranged between the left base plate (12) and the right base plate (13), the sealing ball (11) is arranged between the right backing plate (13) and the groove bottom surface of the oil storage cavity II (7), the joint of the oil injection hole (8) in the stud (4) and the sealing ball (11) is provided with an arc conical surface matched with the sealing ball (11), a plurality of through holes (15) communicated with the second oil storage cavity (7) are formed in the right backing plate (13) along the circumferential direction, the middle part of the left base plate (12) is also provided with a through hole (15) communicated with the second oil storage cavity (7), and the left end surface of the left base plate (12) is abutted to the limit ring sleeve (10).

5. The piston assembly of the automobile brake caliper according to claim 1, wherein a sealing plug (16) fixedly connected with the stud (4) and used for sealing the oil filling opening is arranged at the oil filling opening of the oil filling hole (8) of the stud (4).