CN109555800B

CN109555800B - Disc brake pump

Info

Publication number: CN109555800B
Application number: CN201811612139.6A
Authority: CN
Inventors: 吴尤利
Original assignee: Foshan Feiyu Power Technology Co ltd
Current assignee: Foshan Feiyu Power Technology Co ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-05-22
Anticipated expiration: 2038-12-27
Also published as: CN109555800A

Abstract

The invention provides a disc brake pump, which comprises a pump body and a piston, wherein the pump body is provided with a piston; the pump body is equipped with first pressure chamber and second pressure chamber, and the sectional area of second pressure chamber is greater than the sectional area of first pressure chamber. The upper end of the pump body is provided with an air outlet and an oil inlet, and the aperture of the oil inlet is larger than that of the air outlet; the lower extreme of the pump body has been seted up the oil outlet, and oil outlet and venthole are located same plumb line. The piston comprises a plug rod and a plug head which is integrally formed with the plug rod; the plug head is sleeved with a first sealing ring, a gap between the plug head and the second pressure cavity is sealed, and a groove is concavely arranged at one end of the plug rod, which is far away from the plug head; the inner wall of the first pressure cavity is provided with a second sealing ring, and the second sealing ring is close to the second pressure cavity. The disc brake pump has the advantages of quick brake fluid return, coherent brake response and long service life.

Description

Disc brake pump

Technical Field

The invention relates to the technical field of motor vehicle equipment parts, in particular to a disc brake pump.

Background

As shown in fig. 1, the conventional brake pump includes a pump body 100 and a brake piston 101 disposed in the pump body 100, and since the free stroke of the brake pump 100 is too large and the braking response is not consistent, a first seal ring 102 and a second seal ring 103 need to be disposed on the piston 101, which is complicated in structure.

In addition, an oil inlet hole 104 is opened at the upper end of the pump body 100 for brake fluid to flow in. Because the oil inlet hole 104 is small, the brake fluid rises slowly, so a compensation hole 105 needs to be arranged on the pump body 100 to balance the pressure of the pressure cavity in the brake piston 101. Furthermore, the first sealing ring 102 on the brake piston 101 must seal the oil inlet hole 104 when braking is performed, so that the first sealing ring 102 is more worn, thereby shortening the service life of the brake pump.

Disclosure of Invention

The invention provides a disc brake pump which has the advantages of quick brake fluid return, continuous brake response and long service life.

The technical scheme adopted by the invention is as follows: a disc brake pump, comprising: the pump comprises a pump body and a piston movably arranged in the pump body;

the pump body is provided with a first pressure cavity and a second pressure cavity, the first pressure cavity is communicated with the second pressure cavity, the sectional area of the second pressure cavity is larger than that of the first pressure cavity,

the upper end of the pump body is provided with an air outlet and an oil inlet, the air outlet is communicated with the first pressure cavity, the oil inlet is communicated with the second pressure cavity, and the aperture of the oil inlet is larger than that of the air outlet; the lower end of the pump body is provided with an oil outlet, and the oil outlet and the air outlet are positioned on the same vertical line;

the piston comprises a plug rod and a plug head which is integrally formed with the plug rod; the plug head is sleeved with a first sealing ring, the first sealing ring is abutted against the inner wall of the second pressure cavity to seal a gap between the plug head and the second pressure cavity, and a groove is concavely arranged at one end of the plug rod, which is far away from the plug head;

and a second sealing ring is arranged on the inner wall of the first pressure cavity and is close to the second pressure cavity.

Further, the oil inlet is connected to one end, close to the first pressure cavity, of the second pressure cavity and close to the oil inlet.

Further, the air outlet is connected with an air outlet joint, and the oil inlet is connected with an oil inlet joint.

Further, the aperture of the oil outlet is larger than that of the air outlet.

Further, the gag lever post is concavely provided with a mounting groove, an elastic part is installed in the mounting groove, one end of the elastic part is abutted against the inner wall of the mounting groove, and the other end of the elastic part is abutted against the inner wall of the first pressure cavity.

Compared with the prior art, the disc brake pump has the advantages that the first pressure cavity and the second pressure cavity are arranged in the pump body, and the sectional area of the second pressure cavity is larger than that of the first pressure cavity, so that the free stroke of the piston is effectively reduced, and the brake response of the disc brake pump is continuous. Moreover, a groove is concavely arranged at one end of the plug rod, which is far away from the plug head, and a second sealing ring is arranged on the inner wall of the first pressure cavity, when the disc brake pump is in a braking state, the groove is positioned at the second sealing ring due to the forward movement of the piston, and brake fluid flows out of the groove on the plug rod, so that a larger pump flow is generated; and effectively reduce the wearing and tearing of second sealing washer, increase the life of dish brake pump. In addition, the aperture through setting up the inlet port is greater than the aperture of venthole for the dish brake pump is when braking state, and the inlet port still leaves the space and supplies brake fluid to flow into first pressure intracavity, thereby effectively reduces the idle stroke of piston, accelerates the rising of brake fluid, makes the dish brake pump change the air in the discharge pump body, and the braking response is better, change, more convenient.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings, there is shown in the drawings,

FIG. 1: schematic diagram of a prior art disc brake pump;

FIG. 2: the brake state schematic diagram of the disc brake pump of the invention;

FIG. 3: an enlarged view at a in fig. 2;

FIG. 4: the invention discloses a schematic diagram of a releasing brake state of a disc brake pump;

FIG. 5: schematic view of the pump body of the present invention;

FIG. 6: schematic representation of the piston of the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The terms "front", "rear", "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like in the description of the present invention indicate the orientations or positional relationships based on the drawings of the present invention, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention.

As shown in fig. 2 to 4, the disc brake pump of the present invention includes a pump body 1 and a piston 2 movably installed in the pump body 1.

As shown in fig. 4 to 6, specifically, the pump body 1 is provided with a first pressure chamber 3 and a second pressure chamber 4, wherein the first pressure chamber 3 is communicated with the second pressure chamber 4, the sectional area of the second pressure chamber 4 is larger than that of the first pressure chamber 3, the rear end of the piston 2 is accommodated in the first pressure chamber 3, and the front end of the piston is accommodated in the second pressure chamber 4, so that the free stroke of the piston 2 is effectively reduced, and the braking response of the disc brake pump is consistent.

As shown in fig. 2 and 5, furthermore, venthole 5 has been seted up to the upper end of the pump body 1, and inlet port 6, venthole 5 communicates first pressure chamber 3, inlet port 6 communicates second pressure chamber 4, the aperture of inlet port 6 is greater than the aperture of venthole 5, make the dish brake the brake pump when braking state, inlet port 6 still leaves the space and supplies in the brake fluid inflow first pressure chamber 3, thereby effectively reduce the idle stroke of piston 2, accelerate the rise back of brake fluid, make the dish brake the brake pump change the air of discharging in the pump body 1, the braking response is better, change, it is more convenient. Further, an oil inlet hole 6 is connected to an end of the second pressure chamber 4 near the first pressure chamber 3.

Further, an air outlet joint 7 is installed in the air outlet 5, and an oil inlet joint 8 is installed in the oil inlet 6. The lower end of the pump body 1 is provided with an oil outlet 9 for installing an oil receiving pipe. The oil outlet 9 communicates with the first pressure chamber 3, the oil outlet 9 and the air outlet 5 are located on the same vertical line, and the aperture of the oil outlet 9 is larger than that of the air outlet 5.

As shown in fig. 4 to 6, the piston 2 includes a stopper rod 20 and a stopper 21 integrally formed with the stopper rod 20; wherein, the chock plug 21 cover is equipped with first sealing washer 10, and first sealing washer 10 and the inner wall butt of second pressure chamber 4 seal the clearance between chock plug 21 and the second pressure chamber 4. The stopper rod 20 is concavely provided with a mounting groove 201, an elastic part 11 is mounted in the mounting groove 201, one end of the elastic part 11 is abutted against the inner wall of the mounting groove 201, and the other end of the elastic part is abutted against the inner wall of the first pressure cavity 3 to provide return elastic force for the piston 2. Further, a groove 202 is concavely formed at one end of the plug rod 20 away from the plug head 21 for brake fluid to flow through.

As shown in fig. 2, 4 and 5, in addition, the inner wall of the first pressure chamber 3 is provided with a second sealing ring 12, and the second sealing ring 12 is close to the second pressure chamber 4 and close to the oil inlet 6. When the disc brake pump is in a brake releasing state, the second sealing ring 12 is abutted against the plug rod 20, and a gap between the plug rod and the first pressure chamber 3 is sealed. When the disc brake pump is in a braking state, as the piston 2 moves forwards, the groove 202 is positioned at the second sealing ring 12, and brake fluid flows out of the groove 202 on the plug rod 20, so that a larger pump flow is generated; and effectively reduce the wearing and tearing of second sealing washer 12, increase the life of dish brake pump.

In conclusion, the disc brake pump has the following beneficial effects:

1. through set up first pressure chamber 3 and second pressure chamber 4 in pump body 1, and the sectional area of second pressure chamber 4 is greater than the sectional area of first pressure chamber 3, and the rear end of piston 2 is held in first pressure chamber 3, and the front end is held in second pressure chamber 4 to effectively reduce the free stroke of piston 2, make the braking response of disc brake pump coherent.

2. The aperture through setting up inlet port 6 is greater than the aperture of venthole 5 for the dish brake pump is when braking state, and inlet port 6 still leaves the space and supplies in brake fluid flows into first pressure chamber 3, thereby effectively reduces the idle stroke of piston 2, accelerates the rise back of brake fluid, makes the dish brake pump change the air in the discharge pump body 1, and the braking response is better, change, more convenient.

3. A groove 202 is concavely arranged at one end of the plug rod 20 far away from the plug head 21, and a second sealing ring 12 is arranged on the inner wall of the first pressure cavity 3; when the disc brake pump is in a braking state, the groove 202 is positioned at the second sealing ring 12 due to the forward movement of the piston 2, and brake fluid flows out from the groove 202 on the plug rod 20, so that a larger pump flow is generated; and effectively reduce the wearing and tearing of second sealing washer 12, increase the life of dish brake pump.

Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.

Claims

1. A disc brake pump, characterized by comprising: the pump comprises a pump body (1) and a piston (2) movably arranged in the pump body (1);

the pump body (1) is provided with a first pressure cavity (3) and a second pressure cavity (4), the first pressure cavity (3) is communicated with the second pressure cavity (4), the sectional area of the second pressure cavity (4) is larger than that of the first pressure cavity (3),

the upper end of the pump body (1) is provided with an air outlet (5) and an oil inlet (6), the air outlet (5) is communicated with the first pressure cavity (3), the oil inlet (6) is communicated with the second pressure cavity (4), and the aperture of the oil inlet (6) is larger than that of the air outlet (5); an oil outlet hole (9) is formed in the lower end of the pump body (1), and the oil outlet hole (9) and the air outlet hole (5) are located on the same vertical line;

the piston (2) comprises a plug rod (20) and a plug head (21) which is integrally formed with the plug rod (20); the plug head (21) is sleeved with a first sealing ring (10), the first sealing ring (10) is abutted against the inner wall of the second pressure cavity (4) to seal a gap between the plug head (21) and the second pressure cavity (4), and a groove (202) is concavely arranged at one end, far away from the plug head (21), of the plug rod (20);

and a second sealing ring (12) is arranged on the inner wall of the first pressure cavity (3), and the second sealing ring (12) is close to the second pressure cavity (4).

2. The disc brake pump of claim 1, wherein: the oil inlet hole (6) is connected to one end, close to the first pressure cavity (3), of the second pressure cavity (4) and close to the second sealing ring (12).

3. The disc brake pump of claim 1, wherein: the air outlet (5) is connected with an air outlet joint (7), and the oil inlet (6) is connected with an oil inlet joint (8).

4. The disc brake pump of claim 1, wherein: the aperture of the oil outlet (9) is larger than that of the air outlet (5).

5. The disc brake pump of claim 1, wherein: the stopper rod (20) is concavely provided with a mounting groove (201), an elastic piece (11) is mounted in the mounting groove (201), one end of the elastic piece (11) is abutted to the inner wall of the mounting groove (201), and the other end of the elastic piece is abutted to the inner wall of the first pressure cavity (3).