CN217381389U

CN217381389U - Pressure relief adjusting structure of booster master cylinder

Info

Publication number: CN217381389U
Application number: CN202221500280.9U
Authority: CN
Inventors: 陈灵刚; 刘叶芝; 韩伟玉; 金作斌; 刘叶勇
Original assignee: Yuhuan Aoheng Machinery Co ltd
Current assignee: Yuhuan Aoheng Machinery Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-09-06
Anticipated expiration: 2032-06-14

Abstract

The utility model provides a structure is adjusted in pressure release of pressure boost master cylinder belongs to mechanical technical field. It has solved the current awkward problem of pressure boost master cylinder. This structure is adjusted in pressure release of pressure boost master cylinder, pressure boost master cylinder include the pump body and piston assembly, and pump body inner chamber is separated for brake chamber, oil supply chamber and oil feed chamber, still has in the pump body and adjusts the chamber and should adjust the intracavity and be provided with adjusting valve core and elastic component, adjusts the chamber and be column and its one end extends to the lateral surface of the pump body, the structure is adjusted including connecting the chamber opening part is annular pressure cap and part wear to establish adjust in the pressure cap, the elastic component set up in between adjusting valve core and the adjust, the outer end of adjust stretches out the pressure cap, the adjust can for press cap axial displacement and compression the elastic component, just the adjust can be in axial displacement back location. This pressure release of booster pump master cylinder adjusts structure has convenient to use's advantage.

Description

Pressure relief adjusting structure of booster master cylinder

Technical Field

The utility model belongs to the technical field of machinery, a structure is adjusted in pressure release of pressure boost master cylinder is related to.

Background

In the existing brake master cylinder with large oil discharge capacity, one of the brake master cylinder is that a piston divides an inner cavity of the brake master cylinder into a brake cavity, an oil replenishing cavity and an oil inlet cavity in sequence, and the sectional area of the brake cavity is smaller than that of the oil inlet cavity. However, in the actual braking process of the master cylinder, along with the inward pushing of the piston, the oil supplementing speed of the oil supplementing cavity to the braking cavity is slow, so that the oil pressure in the oil supplementing cavity is continuously increased, and large resistance is caused to the movement of the piston and the push rod, which is not beneficial to braking.

For this reason, the applicant has designed a booster master cylinder and applied for chinese patent with the application numbers: 202210247470.2, respectively; the publication number is as follows: CN 114475547A; the booster master cylinder comprises a pump body and a piston assembly arranged in the pump body, wherein an inner cavity of the pump body is sequentially divided into a brake cavity, an oil supplementing cavity and an oil inlet cavity by the piston assembly, a sealing element capable of enabling oil to flow to the brake cavity in a one-way mode is connected to the piston assembly between the brake cavity and the oil supplementing cavity, an oil inlet communicated with the oil inlet cavity is formed in the side portion of the pump body, an adjusting cavity is further formed in the pump body, an adjusting valve core and an elastic element are arranged in the adjusting cavity, the adjusting cavity is respectively communicated with the brake cavity, the oil supplementing cavity and the oil inlet, the adjusting valve core can block the oil supplementing cavity and the oil inlet under the elastic action of the elastic element, and the adjusting valve core can overcome the elastic force of the elastic element to move under the oil pressure action of the brake cavity and enable the oil supplementing cavity and the oil inlet to be communicated. In the master cylinder, pressure is released through the adjusting cavity, the adjusting valve core and the elastic piece, the oil in the oil supplementing cavity is rapidly released to the oil inlet, and braking resistance is reduced.

However, in the actual production process, different use environments and different use requirements have different requirements for the pressure relief critical pressure value at the regulation cavity, in order to adapt to different requirements, elastic members with different elastic coefficients need to be prepared, and corresponding elastic members need to be replaced according to needs, so that the production, assembly and use are inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a pressure release of pressure boost master cylinder and adjusted the structure, solved current pressure boost master cylinder awkward problem.

The purpose of the utility model can be realized by the following technical proposal:

the pressure relief adjusting structure of the master booster pump comprises a pump body and a piston assembly arranged in the pump body, wherein an inner cavity of the pump body is sequentially divided into a brake cavity, an oil supplementing cavity and an oil inlet cavity by the piston assembly, an oil inlet communicated with the oil inlet cavity is formed in the side part of the pump body, an adjusting cavity is further formed in the pump body, an adjusting valve core and an elastic piece are arranged in the adjusting cavity, the adjusting cavity is respectively communicated with the brake cavity, the oil supplementing cavity and the oil inlet, the adjusting valve core can block the oil supplementing cavity from the oil inlet under the elastic action of the elastic piece, the pressure relief adjusting structure is characterized in that the adjusting cavity is columnar, one end of the adjusting cavity extends to the outer side surface of the pump body, the pressure relief adjusting structure comprises an annular pressure cap connected to an opening of the adjusting cavity and an adjusting piece partially penetrating through the pressure cap, the elastic piece is arranged between the adjusting valve core and the adjusting piece, and the outer end of the adjusting piece extends out of the pressure cap, the adjusting piece can move axially relative to the pressing cap and compress the elastic piece, and the adjusting piece can be positioned after moving axially.

The working principle of the booster master pump is the same as that of the scheme in the reference cited in the background technology, under the default condition, the regulating valve core blocks the oil replenishing cavity from the oil inlet under the elastic force of the elastic part, when the brake is started, the piston assembly moves, the oil pressure in the oil replenishing cavity and the oil inlet rises, and the regulating valve core can overcome the elastic force of the elastic part to move under the oil pressure of the brake cavity and enable the oil replenishing cavity and the oil inlet to be communicated. Under acquiescence state, if need adjust the opening pressure of adjusting the case, the pressure release critical value promptly, the axial position of adjustable regulating part for pressing the cap to the compression elastic component is in order to improve the elasticity of elastic component, perhaps loosens the elasticity to the extrusion of elastic component in order to reduce the elastic component, and the regulating part location after the adjustment keeps this state, makes same pressure boost master cylinder can adapt to the requirement of multiple different pressure releases, need not to change the elastic component, and production, assembly and use are all comparatively convenient.

In the pressure relief adjusting structure of the master cylinder, a spring seat is further arranged in the pressure cap in a penetrating mode and located between the inner end of the adjusting piece and the elastic piece, two ends of the elastic piece can respectively abut against the spring seat and the adjusting valve core, and the adjusting piece can push the spring seat to move synchronously when moving inwards relative to the axial direction of the pressure cap. Set up the spring holder between regulating part and elastic component for the circumferential position change that the regulating part takes place when adjusting can not influence the circumferential position change of elastic component, guarantees the stability and the accuracy that elasticity was adjusted.

In the pressure relief adjusting structure of the master cylinder, the inner wall of the inner end of the pressure cap is a smooth cylindrical surface, the spring seat is cylindrical and corresponds to the cylindrical surface, one end of the spring seat facing the elastic piece is provided with a protruding cylindrical limiting part, the elastic piece is a spring, and one end of the spring is sleeved outside the limiting part and the end of the spring abuts against the spring seat.

In the pressure relief adjusting structure of the master cylinder, the adjusting piece is in threaded connection with the pressure cap. The threaded connection mode can not only ensure the sealing performance, but also ensure the accuracy during the elastic force adjustment, and can position at any position after the adjustment.

In the pressure relief adjusting structure of the master booster pump, the adjusting piece comprises a nut and a screw rod in the pressure cap in threaded connection, the outer end of the screw rod extends out of the pressure cap, the nut is in threaded connection with the outer side of the outer end of the screw rod, and the nut can abut against the outer end face of the pressure cap when screwed in along threads. After the elastic piece is screwed in and compressed along the threads, the screw rod is kept still, and the nut is screwed in, so that the end part of the nut is abutted against the outer end face of the pressing cap, the position of the screw rod is limited, and the position of the screw rod is prevented from changing due to factors such as vibration in the use process.

As another case, in the above pressure relief adjusting structure of the master cylinder, the adjusting member includes a screw screwed into the pressure cap.

Compared with the prior art, the elastic value of the elastic part under the default state can be adjusted by screwing the adjusting part along the thread in the pressure relief adjusting structure of the master cylinder, so that the pressure relief critical value when the adjusting valve core is opened is changed, the master cylinder can adapt to various use requirements, the elastic part does not need to be replaced, and the use is more convenient.

Drawings

Fig. 1 is a schematic structural view of a pressure release adjustment structure of the master cylinder.

Fig. 2 is an enlarged view of a relief pressure adjusting structure of the booster master cylinder.

In the figure, 1, a pump body; 2. a piston assembly; 3. a brake chamber; 4. an oil supply cavity; 5. an oil inlet cavity; 6. an oil inlet; 7. an adjustment chamber; 8. adjusting the valve core; 9. an elastic member; 10. pressing the cap; 11. an adjustment member; 12. a spring seat; 13. a limiting part; 14. a nut; 15. a screw.

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.

Example one

As shown in fig. 1 and 2, the master cylinder includes a pump body 1 and a piston assembly 2 disposed in the pump body 1, an inner cavity of the pump body 1 is sequentially divided into a braking cavity 3, an oil supplementing cavity 4 and an oil inlet cavity 5 by the piston assembly 2, an oil inlet 6 communicated with the oil inlet cavity 5 is disposed at a side portion of the pump body 1, an adjusting cavity 7 is further disposed in the pump body 1, an adjusting valve element 8 and an elastic element 9 are disposed in the adjusting cavity 7, the adjusting cavity 7 is respectively communicated with the braking cavity 3, the oil supplementing cavity 4 and the oil inlet 6, the adjusting valve element 8 can block between the oil supplementing cavity 4 and the oil inlet 6 under the elastic force of the elastic element 9, the adjusting valve element 8 can move against the elastic force of the elastic element 9 under the oil pressure effect of the braking cavity 3 and enables the oil supplementing cavity 4 and the oil inlet 6 to be communicated, and the adjusting cavity 7 is cylindrical and one end of the adjusting cavity 7 extends to an outer side surface of the pump body 1. The working principle and structure of the booster master pump are the same as those in the patent application of the applicant recorded in the background art, and are not described in detail.

The pressure relief adjusting structure of the master cylinder comprises a circular pressure cap 10 and an adjusting part 11, wherein the circular pressure cap 10 is connected to the opening of the adjusting cavity 7 through threads, the adjusting part 11 is partially arranged in the pressure cap 10 in a penetrating mode, the elastic part 9 is arranged between the adjusting valve core 8 and the adjusting part 11, the outer end of the adjusting part 11 extends out of the pressure cap 10, the adjusting part 11 can axially move relative to the pressure cap 10 and compress the elastic part 9, and the adjusting part 11 can be located after the axial movement. In this embodiment, the adjusting member 11 and the pressing cap 10 are screwed together.

Specifically, the inner side of the outer end of the pressing cap 10 is provided with an internal thread in threaded connection with the adjusting piece 11, and the inner side wall of the inner end of the pressing cap 10 is a smooth cylindrical surface. The adjusting piece 11 comprises a nut 14 and a screw rod 15 in the pressing cap 10 in a threaded connection mode, the outer end of the screw rod 15 extends out of the pressing cap 10, the nut 14 is in threaded connection with the outer side of the outer end of the screw rod 15, and the nut 14 can abut against the outer end face of the pressing cap 10 when screwed in along the threads.

A cylindrical spring seat 12 is further arranged in the pressing cap 10 in a penetrating manner, and the position of the spring seat 12 corresponds to the position of the cylindrical surface on the inner side of the inner end of the pressing cap 10. There is no connection between the spring seat 12 and the pressing cap 10, and the spring seat 12 can move axially or rotate circumferentially relative to the pressing cap 10. The spring seat 12 is located between the inner end of the adjusting part 11 and the elastic part 9, one end of the spring seat 12 facing the elastic part 9 is provided with a protruding cylindrical limiting part 13, the elastic part 9 is a spring, two ends of the spring are respectively abutted against the spring seat 12 and the adjusting valve core 8, and one end of the spring facing the spring seat 12 is sleeved on the outer side of the limiting part 13.

When the master cylinder is in a default condition, the adjusting valve core 8 blocks the space between the oil supplementing cavity 4 and the oil inlet 6 under the action of the elastic force of the elastic element 9, at the moment, the adjusting valve core 8 and the elastic element 9 are in a static state, and the elastic value of the elastic element 9 at the moment is set as F.

If the opening pressure of the regulating valve core 8, i.e. the relief threshold value, needs to be adjusted, the screw 15 in the regulating part 11 can be rotated, so that the screw 15 moves axially relative to the pressure cap 10. If the screw rod 15 moves inwards, the elastic part 9 is compressed to increase the elastic force F of the elastic part 9, and further the opening pressure value of the regulating valve core 8 is increased; on the contrary, if the screw 15 moves outwards, the extrusion on the elastic element 9 is released, so that the elastic force F of the elastic element 9 is reduced, and the opening pressure value of the adjusting valve core 8 which overcomes the elastic force of the elastic element 9 to open and release the pressure is reduced.

After adjustment, the nut 14 is screwed relative to the screw 15 until the nut 14 abuts against the outer end face of the pressing cap 10, so that the position of the screw 15 is limited.

Example two

The technical solution of the present embodiment is substantially the same as that of the first embodiment, except that: the adjustment member 11 comprises a screw threaded into the gland 10.

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. The pressure relief adjusting structure of the master booster pump comprises a pump body (1) and a piston assembly (2) arranged in the pump body (1), wherein the inner cavity of the pump body (1) is sequentially divided into a brake cavity (3), an oil supplementing cavity (4) and an oil inlet cavity (5) by the piston assembly (2), the side part of the pump body (1) is provided with an oil inlet (6) communicated with the oil inlet cavity (5), the pump body (1) is also internally provided with an adjusting cavity (7), an adjusting valve core (8) and an elastic member (9) are arranged in the adjusting cavity (7), the adjusting cavity (7) is respectively communicated with the brake cavity (3), the oil supplementing cavity (4) and the oil inlet (6), and the adjusting valve core (8) can block the oil supplementing cavity (4) and the oil inlet (6) under the elastic action of the elastic member (9), and is characterized in that the adjusting cavity (7) is columnar and one end of the adjusting cavity extends to the outer side surface of the pump body (1), the pressure relief adjusting structure comprises a pressure cap (10) and a part, wherein the pressure cap (10) is annular and the part is arranged in a penetrating manner at the opening of the adjusting cavity (7), an adjusting piece (11) in the pressure cap (10) is arranged, an elastic piece (9) is arranged between the adjusting valve core (8) and the adjusting piece (11), the outer end of the adjusting piece (11) extends out of the pressure cap (10), the adjusting piece (11) can move axially relative to the pressure cap (10) and is compressed the elastic piece (9), and the adjusting piece (11) can be positioned after moving axially.

2. The pressure relief adjusting structure of the master cylinder according to claim 1, wherein a spring seat (12) is further arranged in the pressure cap (10) in a penetrating manner, the spring seat (12) is located between an inner end of the adjusting member (11) and the elastic member (9), two ends of the elastic member (9) can respectively abut against the spring seat (12) and the adjusting valve core (8), and the adjusting member (11) can push the spring seat (12) to move synchronously when moving axially inwards relative to the pressure cap (10).

3. The pressure relief adjusting structure of the master cylinder according to claim 2, wherein the inner wall of the inner end of the pressure cap (10) is a smooth cylindrical surface, the spring seat (12) is cylindrical and corresponds to the cylindrical surface, one end of the spring seat (12) facing the elastic member (9) is provided with a protruding cylindrical limiting portion (13), the elastic member (9) is a spring, one end of the spring is sleeved outside the limiting portion (13), and the end of the spring abuts against the spring seat (12).

4. The pressure relief adjustment structure of a master cylinder according to claim 1, 2 or 3, characterized in that the adjustment member (11) and the pressure cap (10) are connected by a screw.

5. The pressure relief adjusting structure of the master cylinder according to claim 4, wherein the adjusting member (11) comprises a nut (14) and a screw (15) screwed into the pressure cap (10), the outer end of the screw (15) extends out of the pressure cap (10), the nut (14) is screwed outside the outer end of the screw (15), and the nut (14) can abut against the outer end surface of the pressure cap (10) when screwed in.

6. The pressure relief adjustment structure of a master cylinder according to claim 4, characterized in that the adjustment member (11) comprises a screw threaded in the pressure cap (10).