Brake master cylinder device and brake system

Abstract

The utility model relates to the field of automobile braking, and discloses a brake master cylinder device and a brake system.The brake master cylinder device comprises a brake assembly and a redundant brake pump, and when braking force is applied to the braking end of a brake rod, the brake rod can push a first reset piston assembly to move; when the first reset piston assembly moves, the second reset piston assembly can be pushed to move, so that the second air cavity is communicated with the first air cavity, assistance air can enter the brake calipers from the working hole to assist the calipers, braking of a vehicle is achieved, and even if a displacement sensor or a brake motor fails, the brake calipers can be automatically reset. And pneumatic braking can be carried out through the redundant brake pump, so that the braking effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile braking, in particular to a brake master cylinder device and a brake system. Background Art

[0002] The braking device is an important component of the vehicle braking system. The braking device mainly includes a brake rod and a displacement sensor. When the displacement sensor detects that the depth of the brake rod has reached the braking position, it sends braking information to the controller to control the brake motor for power-assisted braking. However, when the displacement sensor or the power-assisted motor fails, even if the brake rod has reached the braking position, effective braking cannot be performed, resulting in brake failure. Utility Model Content

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a brake master cylinder device and a brake system, aiming to solve the technical problem of ineffective braking caused by failure of components such as displacement sensors in the existing brake devices.

[0004] In order to solve the above technical problems, in a first aspect, the utility model provides a brake master cylinder device, comprising:

[0005] A brake assembly, the brake assembly comprising a brake rod and a displacement sensor, the displacement sensor is used to detect the displacement of the brake rod; the brake rod comprises a brake end and a free end, the brake end is connected to a brake pedal;

[0006] A redundant brake pump, the redundant brake pump comprises a pump body and a brake assembly arranged inside the pump body, the pump body comprises a first port, a first air cavity, a second air cavity and a second port which are connected in sequence, the pump body is also provided with an exhaust hole and a working hole, the exhaust hole and the working hole are both connected with the first air cavity, the brake assembly comprises a first reset piston assembly and a second reset piston assembly, the first reset piston assembly is arranged in the first air cavity, the second reset piston assembly is arranged in the second air cavity, and the free end of the brake rod is arranged at the first port;

[0007] When a braking force is applied to the braking end, the brake rod pushes the first reset piston assembly to move, and the movement of the first reset piston assembly pushes the second reset piston assembly to move, so that the second air cavity is connected to the first air cavity.

[0008] In a possible implementation, the first reset piston assembly includes a barrier, which separates the first air cavity into a first sub-cavity and a second sub-cavity, wherein the first sub-cavity is connected to the exhaust hole, and the second sub-cavity is connected to the working hole.

[0009] In a possible implementation manner, a communication hole is provided between the first air cavity and the second air cavity, and the second reset piston assembly can move in the second air cavity to open or close the communication hole.

[0010] In a possible implementation manner, the first return piston assembly includes a first piston member and a first return spring, one end of the first return spring abuts against the blocking member, and the other end of the first return spring abuts against an edge of the communicating hole.

[0011] In a possible implementation manner, the second return piston assembly includes a movable cover and a second return spring, one end of the second return spring abuts against the movable cover, and the other end of the second return spring abuts against an edge of the second port.

[0012] In a possible implementation, a dust cap is further included, and the dust cap is arranged on the exhaust hole.

[0013] In a second aspect, the utility model further provides a brake system, comprising the master brake cylinder device as described in the first aspect and:

[0014] an air supply device, the air supply device being in communication with the second port;

[0015] A brake caliper, wherein the brake caliper comprises an air supply hole, and the air supply hole is communicated with a working hole.

[0016] Compared with the prior art, the beneficial effect of the utility model is that when braking force is applied to the braking end of the brake rod, the brake rod can push the first reset piston assembly to move, and when the first reset piston assembly moves, it can push the second reset piston assembly to move, so that the second air chamber is connected to the first air chamber, so that the assisting air can enter the brake caliper from the working hole to assist the caliper, thereby achieving vehicle braking. Even if the displacement sensor or the brake motor fails, pneumatic braking can be performed through the redundant brake pump, thereby improving the braking effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A first cross-sectional view of a brake master cylinder device in one embodiment of the present application;

[0018] Figure 2 A second cross-sectional view of a brake master cylinder device in one embodiment of the present application;

[0019] Figure 3 It is a three-dimensional schematic diagram of a brake master cylinder device in one embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of a brake system in one embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] Please see attached Figure 1-3 The utility model embodiment provides a brake master cylinder device, comprising:

[0025] A brake assembly 100, wherein the brake assembly 100 comprises a brake rod 110 and a displacement sensor 120, wherein the displacement sensor 120 is used to detect the displacement of the brake rod 110; the brake rod 110 comprises a brake end 111 and a free end 112, wherein the brake end 111 is connected to a brake pedal;

[0026] A redundant brake pump 200, the redundant brake pump 200 comprises a pump body 210 and a brake assembly disposed inside the pump body 210, the pump body 210 comprises a first port 211, a first air cavity 212, a second air cavity 213 and a second port 214 which are connected in sequence, the pump body 210 is further provided with an exhaust hole 215 and a working hole 216, the exhaust hole 215 and the working hole 216 are both connected to the first air cavity 212, the brake assembly comprises a first reset piston assembly 220 and a second reset piston assembly 230, the first reset piston assembly 220 is disposed in the first air cavity 212, the second reset piston assembly 230 is disposed in the second air cavity 213, and the free end 112 of the brake rod 110 is disposed at the first port 211;

[0027] When a braking force is applied to the braking end 111 , the brake rod 110 pushes the first reset piston assembly 220 to move. When the first reset piston assembly 220 moves, it pushes the second reset piston assembly 230 to move, so that the second air cavity 213 is connected to the first air cavity 212 .

[0028] Specifically, the first reset piston assembly 220 includes a barrier 221 , which separates the first air cavity 212 into a first sub-cavity 2121 and a second sub-cavity 2122 . The first sub-cavity 2121 is connected to the exhaust hole 215 , and the second sub-cavity 2122 is connected to the working hole 216 .

[0029] Specifically, a communication hole 217 is defined between the first air cavity 212 and the second air cavity 213 , and the second reset piston assembly 230 can move in the second air cavity 213 to open or close the communication hole 217 .

[0030] Specifically, the first return piston assembly 220 includes a first piston member 222 and a first return spring 223 . One end of the first return spring 223 abuts against the blocking member 221 , and the other end abuts against the edge of the connecting hole 217 . The first return spring 223 provides elastic force for returning the first piston member 222 .

[0031] Specifically, the second return piston assembly 230 includes a movable cover 231 and a second return spring 232 . One end of the second return spring 232 abuts against the movable cover 231 , and the other end abuts against the edge of the second port 214 . The second return spring 232 provides elastic force for returning the movable cover 231 .

[0032] Specifically, the master brake cylinder device of the present application also includes a dust cap 300, which is arranged on the exhaust hole 215. The dust cap 300 is used to prevent dust and other debris from entering the exhaust hole 215 and blocking the exhaust hole 215. The setting of the exhaust hole 215 facilitates the smooth movement of the first return spring 223.

[0033] like Figure 4 As shown, in one embodiment, the present application also provides a brake system, including a master brake cylinder device as described above and an air supply device 400, the air supply device 400 is connected to the second port 214; a brake caliper 500, the brake caliper 500 includes an air supply hole, and the air supply hole is connected to the working hole 216.

[0034] Working principle: when the foot is stepped on the pedal, the brake end 111 is subjected to force to push the first reset piston assembly 220 to move. When the first reset piston assembly 220 moves, it pushes the second reset piston assembly 230 to move, thereby opening the connecting hole 217, so that the second air cavity 213 is connected with the first air cavity 212. The air supply device 400 supplies air from the second port 214 into the second air cavity 213, the working hole 216 and the brake caliper 500 in sequence. The brake caliper 500 brakes under the action of pneumatic force, thereby completing the braking.

[0035] It should be noted that the internal structure of the brake caliper is prior art, and its principle of braking through air is also prior art, and is not an improved part of this application.

[0036] The brake system of the present application, when braking force is applied to the braking end of the brake rod, the brake rod can push the first reset piston assembly to move, and the first reset piston assembly can push the second reset piston assembly to move when it moves, so that the second air chamber is connected to the first air chamber, so that the assisting air can enter the brake caliper from the working hole to assist the caliper, thereby achieving vehicle braking. Even if the displacement sensor or the brake motor fails, pneumatic braking can be performed through the redundant brake pump, thereby improving the braking effect.

[0037] Obviously, the above is only a preferred implementation of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A brake master cylinder device, characterized in that: include: A brake assembly (100), the brake assembly (100) comprising a brake rod (110) and a displacement sensor (120), the displacement sensor (120) being used to detect the displacement of the brake rod (110); the brake rod (110) comprising a brake end (111) and a free end (112), the brake end (111) being connected to a brake pedal; A redundant brake pump (200), the redundant brake pump (200) comprising a pump body (210) and a brake assembly arranged inside the pump body (210), the pump body (210) comprising a first port (211), a first air chamber (212), a second air chamber (213) and a second port (214) which are connected in sequence, the pump body (210) further comprising an exhaust hole (215) and a working hole (216), the exhaust hole (215) and the working hole (216) both being connected to the first air chamber (212), the brake assembly comprising a first reset piston assembly (220) and a second reset piston assembly (230), the first reset piston assembly (220) being arranged in the first air chamber (212), the second reset piston assembly (230) being arranged in the second air chamber (213), and the free end (112) of the brake rod (110) being arranged at the first port (211); When a braking force is applied to the braking end (111), the braking rod (110) pushes the first reset piston assembly (220) to move, and when the first reset piston assembly (220) moves, it pushes the second reset piston assembly (230) to move, so that the second air chamber (213) is connected to the first air chamber (212).

2. The brake master cylinder device according to claim 1, characterized in that: The first reset piston assembly (220) comprises a barrier (221), wherein the barrier (221) separates the first air cavity (212) into a first sub-cavity (2121) and a second sub-cavity (2122), wherein the first sub-cavity (2121) is connected to the exhaust hole (215), and the second sub-cavity (2122) is connected to the working hole (216).

3. The master brake cylinder device according to claim 2, characterized in that: A communication hole (217) is provided between the first air cavity (212) and the second air cavity (213), and the second reset piston assembly (230) can move in the second air cavity (213) to open or close the communication hole (217).

4. The brake master cylinder device according to claim 3, characterized in that: The first return piston assembly (220) comprises a first piston member (222) and a first return spring (223); one end of the first return spring (223) abuts against the blocking member (221), and the other end abuts against the edge of the connecting hole (217).

5. The brake master cylinder device according to claim 3, characterized in that: The second return piston assembly (230) comprises a movable cover (231) and a second return spring (232); one end of the second return spring (232) abuts against the movable cover (231), and the other end abuts against the edge of the second port (214).

6. The brake master cylinder device according to claim 1, characterized in that: It also includes a dust cap (300), wherein the dust cap (300) is arranged on the exhaust hole (215).

7. A braking system, characterized in that: The invention comprises a brake master cylinder device as claimed in any one of claims 1 to 6, and an air supply device (400), the air supply device (400) being in communication with the second port (214); A brake caliper (500), the brake caliper (500) comprising an air supply hole, the air supply hole being in communication with a working hole (216).

Images