CN110936942A

CN110936942A - Brake master cylinder assembly with double one-way valves

Info

Publication number: CN110936942A
Application number: CN201911407158.XA
Authority: CN
Inventors: 康伟铭; 汤宗兵
Original assignee: Wuhu Juda Auto Parts Co Ltd
Current assignee: Wuhu Juda Auto Parts Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-03-31

Abstract

The invention discloses a brake master cylinder assembly with a double one-way valve, which relates to the technical field of automobile parts and comprises a brake master cylinder, a piston I and a piston II, wherein a cylindrical cavity with an opening towards the left side is formed in the brake master cylinder, an L-shaped front oil inlet is formed in the upper portion, close to the right end, of the outer wall of the brake master cylinder, a rear oil inlet is formed in the upper portion, close to the left side, of the outer wall of the brake master cylinder, a front oil outlet is formed in the left side of the front oil inlet, a rear oil outlet is formed in the outer wall of the brake master cylinder, the front oil inlet, the rear oil outlet, the front oil outlet and the rear oil outlet are communicated with the cavity, a rhombic mounting lug is arranged on the left side of the outer wall of the brake master cylinder, a hole retainer ring is arranged on the left side of the cavity of the. The brake master cylinder assembly with the double one-way valves avoids the need of processing a compensation hole with phi of 0.7mm on a cylinder body like the traditional brake master cylinder.

Description

Brake master cylinder assembly with double one-way valves

Technical Field

The invention relates to the technical field of automobile parts, in particular to a brake master cylinder assembly with a double one-way valve.

Background

The brake master cylinder is also called as a hydraulic brake master cylinder and is a power source of a service brake system. The braking force is derived from the pedal force applied to the brake pedal by the driver and the vacuum level (vacuum assist) of the engine intake manifold, which is the primary power source for the master cylinder. The main function of the master cylinder is to convert the mechanical force applied by the driver on the brake pedal and the force of the vacuum booster into brake oil pressure, and to send the brake fluid with a certain pressure to the brake cylinders (wheel cylinders) of each wheel through the brake pipeline, and then to convert the brake fluid into wheel braking force. The conventional brake master cylinder needs to process a compensation hole with the diameter of 0.7mm on a cylinder body, and the filling and discharging work of brake oil in the cylinder body can be accelerated by arranging the compensation hole, but the processing technology difficulty of the small hole is extremely high, and the quality is difficult to control.

Disclosure of Invention

The invention aims to provide a brake master cylinder assembly with a double one-way valve, which aims to overcome the defects caused in the prior art.

A brake master cylinder assembly with a double one-way valve comprises a brake master cylinder, a first piston and a second piston, wherein the brake master cylinder is cylindrical and arranged in a left-right direction, a cylindrical cavity with an opening facing the left is formed in the brake master cylinder, an L-shaped front oil inlet is formed in the position, close to the right end, of the outer wall of the brake master cylinder, a front oil pipe is arranged at the front oil inlet, a rear oil inlet is formed in the position, close to the left side, of the outer wall of the brake master cylinder, a rear oil outlet is formed in the right side of the rear oil inlet, a rear oil outlet is formed in the position, a rear oil outlet pipe is formed in the position of, the brake master cylinder is characterized in that a hole check ring is installed on the left side of a cavity of the brake master cylinder, a first piston and a second piston are respectively arranged in the cavity of the inner side of the hole check ring on the right side and on the left side, the first piston is a revolving body with a middle-shaped longitudinal section, an O-shaped ring is sleeved in the middle of the first piston, check valve spools are symmetrically arranged on the left side and the right side of the first piston in a sliding mode, a check valve body is sleeved on the right end of the check valve spool, a check valve spring is sleeved between the check valve body and the right end of the check valve spool, spring seats are symmetrically clamped at the left end and the right end of the first piston, a return spring is connected between the spring seats and the check valve body, a check valve sealing ring is sleeved on the right end of the check valve spool, the second piston is a revolving body with an I-shaped longitudinal section, and O-shaped rings and three O-shaped rings are sleeved at the left end and, and a T-shaped oil through hole is formed in the left end part of the piston II.

Preferably, the front oil outlet pipe and the rear oil outlet pipe are respectively provided with a residual valve I and a residual valve II.

Preferably, the forward oil pipe, the backward oil pipe, the first residual valve and the second residual valve are plugged with rubber plugs.

Preferably, a rubber bellows type dust cover is attached to an opening of the master cylinder.

Preferably, a push rod groove is machined in the left end face of the second piston.

Preferably, the brake master cylinder is cast with the forward oil pipe, the rear oil pipe, the front oil outlet pipe and the rear oil outlet pipe in a one-piece manner.

The invention has the advantages that: the rod piece pushes the piston II to move towards the right from the groove of the push rod to drive the check valve sealing ring on the left side of the piston I to block the oil through hole, and the check valve sealing ring on the right side of the piston I to block the oil inlet, namely, the two check valves are closed, high-pressure environments can be established on two sides of the piston I, and brake oil can be discharged from the front oil outlet pipe and the rear oil outlet pipe; when the push rod is removed, the first piston returns to the initial position under the elastic force action of the return springs on the two sides, the check valve sealing rings on the two sides are separated from contact with the oil through hole and the oil advancing port under the elastic force action of the check valve springs, namely the check valve is opened, low-pressure environments can be established on the two sides of the first piston, and brake oil can enter a cavity of the brake master cylinder from the front oil inlet and the oil advancing port. The problem that the filling and discharging work of the brake oil in the cylinder body can be quickly realized only by processing a compensation hole with phi of 0.7mm on the cylinder body in the traditional brake master cylinder is avoided.

Drawings

Fig. 1 is a schematic overall top view of the present invention.

Fig. 2 is a schematic structural diagram of the whole front view of the present invention.

FIG. 3 is a schematic overall side view of the present invention.

Fig. 4 is a schematic structural view of a position of the piston in fig. 2.

Wherein:

1-a master brake cylinder; 101-a front oil inlet; 102-rear oil inlet; 103-front oil outlet; 104-rear oil outlet; 105-mounting ears; 2-advancing the oil pipe; 3-feeding an oil pipe; 4-front oil outlet pipe; 5-rear oil outlet pipe; 6-residual valve one; 7-residual valve two; 8-retainer ring for hole; 9-a dust cover; 10-a piston one; 11-O-shaped ring I; 12-one-way valve core; 13-spring seats; 14-a return spring; 15-one-way valve body; 16-one-way valve sealing ring; 17-a one-way valve spring; 18-piston two; 1801-pushrod recess; 1802-oil through hole; 19-O-shaped ring II; 20-O-shaped ring III; 21-plug head.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 4, a brake master cylinder assembly with a double one-way valve comprises a brake master cylinder 1, a piston one 10 and a piston two 18, wherein the brake master cylinder 1 is cylindrical and arranged in a left-right direction, a cylindrical cavity opened towards the left is arranged in the brake master cylinder 1, an L-shaped forward oil port 101 is arranged above the right end of the outer wall of the brake master cylinder 1, a forward oil pipe 2 is arranged at the front oil inlet 101, a rear oil inlet 102 is arranged above the left side of the outer wall of the brake master cylinder 1, a rear oil pipe 3 is arranged at the rear oil inlet 102, a front oil outlet 103 is arranged at the left side of the front oil inlet 101 and a front oil outlet pipe 4 is arranged at the front oil outlet 103 on the outer wall of the brake master cylinder 1, a rear oil outlet 104 is arranged at the right side of the rear oil inlet 102 and a rear oil outlet 5 is arranged at the rear oil outlet 104 on the, The front oil outlet 103 and the rear oil outlet 104 are communicated with a cavity of the brake master cylinder 1, a rhombic mounting lug 105 is arranged on the left side of the outer wall of the brake master cylinder 1, a hole retainer 8 is arranged on the left side of the cavity of the brake master cylinder 1, a first piston 10 and a second piston 18 are respectively arranged in the cavity on the inner side of the hole retainer 8 on the right side and on the left side, the first piston 10 is a rotary body with a middle-shaped longitudinal section, an O-shaped ring 11 is sleeved in the middle of the first piston 10, a one-way valve spool 12 is symmetrically arranged on the left side and the right side of the first piston 10 in a sliding manner, a one-way valve body 15 is sleeved on the right end of the one-way valve spool 12, a one-way valve spring 17 is sleeved between the right end of the one-way valve body 15 and the right end of the one-way valve spool 12, spring seats 13 are symmetrically clamped at the left end and the right end of the first piston 10, and a return spring, the right end of the check valve spool 12 is sleeved with a check valve sealing ring 16, the second piston 18 is a revolving body with an I-shaped longitudinal section, the left end and the right end of the second piston 18 are sleeved with a second O-shaped ring 19 and a third O-shaped ring 20, and the left end of the second piston 18 is provided with a T-shaped oil through hole 1802.

In the present invention, the front outlet pipe 4 and the rear outlet pipe 5 are respectively provided with a residual valve I6 and a residual valve II 7. The residual valve is located between the cavity of the master cylinder 1 and the brake line. In the process of realizing braking, the brake fluid in the master cylinder 1 flows through the small holes on the residual valve and is discharged to a pipeline under the action of the pedal force, braking is realized through the transmission of the brake fluid pressure by the master cylinder, after the braking is released, part of the brake fluid flows back to the cavity of the master cylinder 1, the pressure of the brake fluid in the cavity of the master cylinder 1 is zero, and a certain value of residual pressure can still be kept in the cavity of the master cylinder 1 and the brake pipeline under the action of the residual valve. The two aspects of the residual valve act to substantially improve the braking performance of the vehicle.

In the present invention, the oil feed pipe 2, the oil feed pipe 3, the first residual valve 6, and the second residual valve 7 are plugged with rubber plugs 21. The plug 21 can prevent the residual oil in the master cylinder 1 from leaking when the master cylinder assembly is not used, and can reduce the impurities from entering the cavity of the master cylinder 1 from the corresponding hole.

In the present invention, a rubber bellows type dust cover 9 is attached to an opening of the master cylinder 1. The dust cover 9 is arranged, so that too many impurities entering the cavity of the brake master cylinder 1 in the use process of the brake master cylinder assembly can be effectively reduced.

In the invention, a push rod groove 1801 is processed on the left end face of the second piston 18. The push rod groove 1801 is arranged to facilitate the positioning and putting in of the push rod.

In the present invention, the master cylinder 1 is cast with the forward oil pipe 2, the rear oil pipe 3, the front oil outlet pipe 4 and the rear oil outlet pipe 5 as a single piece.

In the invention, the working principle and the working process of the brake master cylinder assembly with the double one-way valves are as follows:

the rod piece pushes the second piston 18 to move towards the right from the push rod groove 1801, the left check valve sealing ring 16 on the first piston 10 is driven to block the oil through hole 1802, the right check valve sealing ring 16 on the first piston 10 is driven to block the oil inlet 101, namely, two check valves are closed, high-pressure environments are established on two sides of the first piston 10, and brake oil is discharged from the front oil outlet pipe 4 and the rear oil outlet pipe 5; when the push rod is removed, the piston I10 returns to the initial position under the elastic force of the return springs 14 at both sides, and the check valve sealing rings 16 at both sides are separated from the contact with the oil through hole 1802 and the forward oil port 101 under the elastic force of the check valve springs 17, that is, the check valve is opened, a low-pressure environment is established at both sides of the piston I10, and the brake oil is introduced into the cavity of the master cylinder 1 from the forward oil port 101 and the rearward oil port 102. The problem that the filling and discharging work of the brake oil in the cylinder body can be quickly realized only by processing a compensation hole with phi of 0.7mm on the cylinder body in the traditional brake master cylinder is avoided.

The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The utility model provides a take two check valve brake master cylinder assemblies which characterized in that: the brake system comprises a brake main cylinder (1), a piston I (10) and a piston II (18), wherein the brake main cylinder (1) is cylindrical and arranged in a left-right direction, a cylindrical cavity with an opening facing the left is formed in the brake main cylinder (1), an L-shaped front oil inlet (101) is formed in the outer wall of the brake main cylinder (1) close to the right end, a front oil inlet pipe (2) is arranged at the front oil inlet (101), a rear oil inlet (102) is formed in the outer wall of the brake main cylinder (1) close to the left, a rear oil inlet pipe (3) is arranged at the rear oil inlet (102), a front oil outlet (103) is formed in the left side of the front oil inlet (101) in the outer wall of the brake main cylinder (1), a front oil outlet pipe (4) is formed in the front oil outlet (103), a rear oil outlet (104) is formed in the right side of the rear oil inlet (102) in the outer wall of the brake main, the front oil port (101), the rear oil port (102), the front oil outlet (103) and the rear oil outlet (104) are communicated with a cavity of the brake master cylinder (1), a rhombic mounting lug (105) is arranged on the left side of the outer wall of the brake master cylinder (1), a hole check ring (8) is arranged on the left side of the cavity of the brake master cylinder (1), a piston I (10) and a piston II (18) are respectively arranged in the cavity on the inner side of the hole check ring (8) on the right side and on the left side, the piston I (10) is a revolving body with a middle-shaped longitudinal section, an O-shaped ring I (11) is sleeved in the middle of the piston I (10), check valve spools (12) are symmetrically arranged on the left side and the right side of the piston I (10) in a sliding mode, a check valve body (15) is sleeved on the right end of the check valve spool (12), and a check valve spring (17) is sleeved between the check valve body (15) and the right end of the check valve spool (12), spring seat (13) have been blocked to the left and right ends symmetry of piston one (10), be connected with return spring (14) between spring seat (13) and check valve body (15), the right-hand member cover of check valve case (12) is equipped with check valve sealing washer (16), piston two (18) are the solid of revolution of "worker" style of calligraphy for longitudinal section to both ends cover is equipped with O type circle two (19) and O type circle three (20) about piston two (18), the fluid through-hole (1802) of T type is seted up to the left end of piston two (18).

2. The brake master cylinder assembly with the double one-way valve according to claim 1, wherein: and a first residual valve (6) and a second residual valve (7) are respectively arranged on the front oil outlet pipe (4) and the rear oil outlet pipe (5).

3. The brake master cylinder assembly with the double one-way valve according to claim 1, wherein: and rubber plugs (21) are plugged on the front oil pipe (2), the rear oil pipe (3), the first residual valve (6) and the second residual valve (7).

4. The brake master cylinder assembly with the double one-way valve according to claim 1, wherein: a rubber bellows-type dust cover (9) is attached to an opening of the master cylinder (1).

5. The brake master cylinder assembly with the double one-way valve according to claim 1, wherein: and a push rod groove (1801) is machined in the left end face of the second piston (18).

6. The brake master cylinder assembly with the double one-way valve according to claim 1, wherein: the brake master cylinder (1) and the front oil pipe (2), the rear oil pipe (3), the front oil outlet pipe (4) and the rear oil outlet pipe (5) are cast into a whole.