Brake system and vehicle

Abstract

The utility model discloses a braking system and a vehicle, which comprises a container, a boosting assembly, a first pipeline, a valve and a second pipeline, the container is used for storing braking fluid; the first pipeline is connected between the power assisting assembly and the container; the second pipeline is connected between the power assisting assembly and the container, the valve is arranged on the second pipeline, and the valve is used for being opened when the power assisting assembly is reset and enabling the second pipeline to drain part of the brake fluid back into the container before the first pipeline. According to the brake system, the problem that vehicle deceleration is instantly lost when brake fluid flows back can be avoided, the situation that brake fluid residual pressure easily exists after resetting is also avoided, and then the problems that the vehicle is dragged, and oil consumption and power consumption are increased are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of braking, in particular to a braking system and a vehicle. Background Art

[0002] At present, the brake system is usually equipped with an additional power-assisted brake mechanism. When the driver steps on the pedal, the power-assisted brake mechanism will also deliver brake fluid to the caliper, thereby enhancing the braking force. However, in the prior art, when the piston of the power-assisted brake mechanism is reset to the initial position, there is still a problem of residual brake fluid pressure in the brake system, which can easily lead to vehicle drag, increased fuel consumption, and power consumption. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the utility model proposes a braking system, which can avoid the problem of instantaneous loss of vehicle deceleration when the brake fluid flows back, and also avoid the situation where residual brake fluid pressure is easily present after resetting, thereby avoiding the problem of vehicle dragging and increased fuel and power consumption.

[0005] The embodiment of the utility model also provides a vehicle including the above-mentioned braking system.

[0006] The braking system of the utility model embodiment includes:

[0007] a container for storing brake fluid;

[0008] A power-assisting assembly and a first pipeline, wherein the first pipeline is connected between the power-assisting assembly and the container;

[0009] A valve and a second pipeline, wherein the second pipeline is connected between the power-assisting assembly and the container, and the valve is arranged on the second pipeline, and the valve is used to open when the power-assisting assembly is reset and enable the second pipeline to discharge part of the brake fluid back to the container before the first pipeline.

[0010] In some embodiments, the power-assisting assembly has a connecting hole connected to the brake of the wheel, and the connection between the second pipeline and the power-assisting assembly is located between the connecting hole and the connection between the first pipeline and the power-assisting assembly.

[0011] In some embodiments, the power assist assembly includes:

[0012] A cylinder body, wherein the cylinder body is provided with a first hole and a second hole communicating with an inner cavity of the cylinder body, the first pipeline is connected between the first hole and the container, and the second pipeline is connected between the second hole and the container,

[0013] The piston is slidably assembled in the cylinder body, the piston is provided with a third hole, and the first pipeline is used to communicate with the inner cavity of the cylinder body through the third hole and the first hole when the piston is reset to a set position.

[0014] In some embodiments, the power assist assembly includes two seals, both of which are disposed in the cylinder body and arranged at intervals along the sliding direction of the piston, and both of which are sleeved on the outer peripheral side of the piston, the first hole is located between the two seals, and the second hole is located on the outside of the two seals.

[0015] In some embodiments, the piston includes a barrel and a partition, the barrel is slidably assembled in the cylinder body, the partition is arranged in the barrel and divides the inner cavity of the barrel into a first cavity and a second cavity, the first cavity is connected with the inner cavity of the cylinder body, and the third hole is arranged in the barrel wall of the barrel that is connected with the first cavity and passes through the outer peripheral side of the first cavity.

[0016] In some embodiments, the piston is provided with a fourth hole, the aperture of the fourth hole is smaller than the aperture of the third hole, the fourth hole and the third hole are arranged at intervals along the sliding direction of the piston, and the fourth hole is connected to the first hole before the third hole during the process of resetting the piston.

[0017] In some embodiments, there are a plurality of the fourth holes, and the plurality of the fourth holes are arranged spirally along the sliding direction of the piston.

[0018] In some embodiments, the apertures of the plurality of fourth holes gradually decrease in a direction away from the third hole.

[0019] In some embodiments, one end of the first pipeline is connected to the power assist assembly, one end of the first pipeline is connected to the second pipeline, and a connection between the first pipeline and the second pipeline is located between the container and the valve.

[0020] The vehicle of the embodiment of the utility model includes a braking system as described in any of the above embodiments.

[0021] Beneficial effects: The braking system and vehicle of the embodiments of the utility model can avoid the problem of instantaneous loss of vehicle deceleration when the brake fluid flows back, and also avoid the situation where residual brake fluid pressure is easily present after resetting, thereby avoiding the problem of vehicle dragging and increased fuel and power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a braking system according to an embodiment of the present utility model.

[0023] Figure 2 yes Figure 1 Schematic diagram of the structure of the central power assist assembly.

[0024] Figure 3 yes Figure 2 Schematic diagram of the piston.

[0025] Figure 4 yes Figure 2 Enlarged diagram of the middle piston.

[0026] Figure 5 It is a schematic diagram of a piston according to another embodiment of the utility model.

[0027] Reference numerals:

[0028] 1-Container;

[0029] 2-boost assembly; 21-cylinder body; 211-first hole; 212-second hole; 22-piston; 221-cylinder; 222-partition; 223-third hole; 224-fourth hole; 225-first chamber; 226-second chamber; 23-seal; 24-connecting hole;

[0030] 3-First pipeline;

[0031] 4- Second pipeline;

[0032] 5- Valve. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0034] like Figure 1 As shown, the braking system of the embodiment of the utility model includes a container 1, a power-assisting assembly 2, a first pipeline 3, a valve 5 and a second pipeline 4.

[0035] The container 1 is used to store brake fluid, wherein the container 1 may be an oil pot, and the brake fluid may be hydraulic oil or the like.

[0036] The power-assisting assembly 2 is hydraulic and can be connected to the wheel brake (caliper) through a pipeline. When the driver steps on the pedal, the power-assisting assembly 2 will also start synchronously and deliver brake fluid to the brake, thereby increasing the braking force.

[0037] The first pipeline 3 is connected between the power-assisting assembly 2 and the container 1. For example, one end of the first pipeline 3 is directly connected to the power-assisting assembly 2, and the other end of the first pipeline 3 can be directly connected to the container 1. After the wheel is braked or braked, the power-assisting assembly 2 will be reset to the initial position. When the power-assisting assembly 2 is reset to a certain position, the first pipeline 3 will be connected to the power-assisting assembly 2. At this time, the brake fluid sucked by the power-assisting assembly 2 during the reset can be discharged back into the container 1 through the first pipeline 3, thereby playing a role in relieving the pressure of the brake.

[0038] The second pipeline 4 is connected between the power-assisting assembly 2 and the container 1 , and a valve 5 is provided on the second pipeline 4 . The valve 5 is used to open when the power-assisting assembly 2 is reset and enable the second pipeline 4 to discharge part of the brake fluid back to the container 1 before the first pipeline 3 .

[0039] For example, Figure 1 As shown, one end of the second pipeline 4 can be directly connected to the power assist assembly 2, and the other end of the second pipeline 4 can be directly connected to the container 1. The valve 5 can be a POV valve, and the valve 5 can be directly installed on the second pipeline 4.

[0040] During the resetting process of the power-assisted assembly 2, the valve 5 can be opened. At this time, the brake fluid in the power-assisted assembly 2 can first flow into the container 1 through the second pipeline 4, thereby realizing partial pressure relief of the brake fluid in advance, avoiding the situation in which the hydraulic pressure in the power-assisted assembly 2 instantly becomes zero when the pressure is relieved directly through the second pipeline 4, thereby avoiding the problem of instantaneous loss of vehicle deceleration.

[0041] Secondly, when the power-assisted assembly 2 is reset to the corresponding position, the first pipeline 3 will be connected to the power-assisted assembly 2. At this time, the brake fluid in the power-assisted assembly 2 can be directly discharged back to the container 1 through the first pipeline 3, thereby achieving complete pressure relief of the brake fluid, avoiding the situation where residual pressure of the brake fluid is easily present after the power-assisted assembly 2 is reset, and further avoiding the problems of vehicle dragging, increased fuel consumption and power consumption.

[0042] In some embodiments, the power-assisting assembly 2 has a connecting hole 24 connected to the brake of the wheel, and the connection between the second pipeline 4 and the power-assisting assembly 2 is located between the connecting hole 24 and the connection between the first pipeline 3 and the power-assisting assembly 2 .

[0043] For example, the power assist assembly 2 may include a cylinder 21, in which a piston 22 may be slidably mounted, the cylinder 21 generally extending in the front-rear direction, and a connecting hole 24 may be provided at the front end of the cylinder 21. When in use, the outer end opening of the connecting hole 24 may be connected to the brake through a pipeline. When in use, the brake fluid in the power assist assembly 2 may be transported to the brake through the connecting hole 24, and when the power assist assembly 2 is reset, the brake fluid in the brake and the corresponding pipeline may also be discharged back into the power assist assembly 2 through the connecting hole 24.

[0044] The connection between the first pipeline 3 and the power-assisting assembly 2 can be located at the rear side of the connection between the second pipeline 4 and the power-assisting assembly 2. Therefore, during the resetting process of the power-assisting assembly 2 (the piston 22 moves backward), the second pipeline 4 can first be connected to the inner cavity of the cylinder body 21, and then the first pipeline 3 will be connected to the inner cavity of the cylinder body 21, thereby meeting the need for partial early pressure relief and avoiding the problem of instantaneous loss of vehicle deceleration.

[0045] In some embodiments, Figure 2 As shown, the power assist assembly 2 includes a cylinder body 21 and a piston 22. The cylinder body 21 is provided with a first hole 211 and a second hole 212 connected to the inner cavity of the cylinder body 21. The first pipeline 3 is connected between the first hole 211 and the container 1, and the second pipeline 4 is connected between the second hole 212 and the container 1.

[0046] For example, the cylinder body 21 can be generally cylindrical, the first hole 211 and the second hole 212 can both be circular holes and can both be arranged on the top side of the cylinder body 21, and the first hole 211 and the second hole 212 can both penetrate the cylinder wall of the cylinder body 21 in the up-down direction. The first hole 211 can be arranged near the rear end of the cylinder body 21, and the second hole 212 can be arranged near the front end of the cylinder body 21. During assembly, the first pipeline 3 can be directly sealed and docked with the first hole 211, and the second pipeline 4 can be directly sealed and docked with the second hole 212. As a result, the connection arrangement between the container 1 and the power assist assembly 2 is facilitated.

[0047] The piston 22 is slidably assembled in the cylinder body 21. The piston 22 is provided with a third hole 223. The first pipeline 3 is used to communicate with the inner cavity of the cylinder body 21 through the third hole 223 and the first hole 211 when the piston 22 is reset to the set position.

[0048] For example, one end opening of the third hole 223 can be provided at the front end surface of the piston 22, and the other end opening of the third hole 223 can be provided at the outer peripheral wall of the piston 22. Thus, when the piston 22 slides backward and the power assist assembly 2 is reset, the second hole 212 can always be connected with the inner cavity of the cylinder 21. At this time, the valve 5 can be opened so that the brake fluid in the cylinder 21 can be discharged back to the container 1 through the second pipeline 4.

[0049] As the piston 22 continues to slide backward, for example, when the piston 22 slides to the position as shown in 2, the third hole 223 will be connected to the first hole 211, and the brake fluid in the cylinder body 21 will be discharged back to the container 1 through the third hole 223, the first hole 211, and the first pipeline 3 in sequence, thereby achieving complete pressure relief of the brake fluid.

[0050] In some embodiments, the power assist assembly 2 includes two seals 23, both of which are disposed in the cylinder body 21 and arranged at intervals along the sliding direction of the piston 22, and both of the seals 23 are sleeved on the outer peripheral side of the piston 22, the first hole 211 is located between the two seals 23, and the second hole 212 is located on the outside of the two seals 23.

[0051] For example, Figure 2 As shown, the seal 23 can be an O-type rubber ring, and the two seals 23 can be fixed on the inner peripheral wall of the cylinder 21 and can be arranged at intervals in the front-to-back direction. The two seals 23 can be arranged adjacent to the rear end of the cylinder 21.

[0052] When in use, the two seals 23 can realize an annular seal between the inner peripheral wall of the cylinder 21 and the outer peripheral wall of the piston 22. Therefore, when the third hole 223 is located in front of the front seal 23, the third hole 223 will not be connected with the first hole 211 due to the sealing stop of the front seal 23, thereby avoiding the situation where the instantaneous deceleration drops to zero during reset. When the opening of the third hole 223 located in the outer peripheral wall of the piston 22 moves between the two seals 23, the third hole 223 will be connected with the first hole 211. At this time, the brake fluid in the cylinder 21 will be discharged back into the container 1 through the third hole 223, the first hole 211, and the first pipeline 3.

[0053] In some embodiments, the piston 22 includes a barrel 221 and a partition 222. The barrel 221 is slidably assembled in the cylinder body 21. The partition 222 is disposed in the barrel 221 and divides the inner cavity of the barrel 221 into a first cavity 225 and a second cavity 226. The first cavity 225 is connected to the inner cavity of the cylinder body 21. The third hole 223 is disposed on the barrel wall of the barrel 221 which is connected to the first cavity 225 and passes through the outer peripheral side of the first cavity 225.

[0054] For example, Figure 3 and Figure 4 As shown, the barrel 221 can be generally in the shape of a circular cylinder, and the partition 222 can be integrally formed in the barrel 221 and can be adjacent to the front end of the barrel 221. The partition 222 can separate the inner cavity of the barrel 221 into two parts, namely a first cavity 225 and a second cavity 226, wherein the first cavity 225 can be located in front of the second cavity 226.

[0055] When the piston 22 is assembled in the cylinder body 21, the first chamber 225 can always be connected to the inner chamber of the cylinder body 21, and the second chamber 226 can be facing the outside of the cylinder body 21. The second chamber 226 can be used for the insertion of transmission and driving components such as a screw and a motor and realize the connection with the piston 22, thereby meeting the need for driving the piston 22 to move back and forth relative to the cylinder body 21.

[0056] like Figure 4 As shown, the third hole 223 can be arranged on the outer peripheral side of the first cavity 225 , and the third hole 223 can penetrate the wall of the cylinder portion 221 on the outer peripheral side of the first cavity 225 along the radial direction of the piston 22 , thereby facilitating the processing and arrangement of the third hole 223 .

[0057] In some embodiments, the piston 22 is provided with a fourth hole 224, the aperture of the fourth hole 224 is smaller than the aperture of the third hole 223, the fourth hole 224 and the third hole 223 are arranged at intervals along the sliding direction of the piston 22, and the fourth hole 224 is connected to the first hole 211 before the third hole 223 during the resetting process of the piston 22.

[0058] For example, Figure 3 and Figure 4 As shown, the fourth hole 224 may be a round hole, the fourth hole 224 may be arranged at the rear side of the third hole 223, the fourth hole 224 may be a micro hole, and specifically, the diameter of the fourth hole 224 may not exceed 12 mm. During the process of the piston 22 resetting backward, the inner cavity of the cylinder body 21 may first be connected to the first hole 211 through the fourth hole 224, and then be connected to the first hole 211 through the third hole 223. Thus, the use requirement of partial pressure relief of the brake fluid in advance is further met.

[0059] In some embodiments, multiple third holes 223 and multiple fourth holes 224 can be provided. Multiple third holes 223 can be arranged at equal intervals along the circumference of the piston 22, and multiple fourth holes 224 can also be arranged at equal intervals along the circumference of the piston 22 and can be provided one by one on the rear side of each third hole 223.

[0060] In some embodiments, there are a plurality of fourth holes 224, and the plurality of fourth holes 224 are arranged spirally along the sliding direction of the piston 22. Figure 5 As shown, two fourth holes 224 can be provided on the rear side of each third hole 223, and the two fourth holes 224 can be arranged at intervals in the front-to-rear direction. Since the multiple fourth holes 224 can be connected with the first hole 211 in sequence during the resetting process of the piston 22, the need for partial early pressure relief of the brake fluid can be further realized.

[0061] like Figure 5 As shown, the multiple fourth holes 224 on the rear side of each third hole 223 can be arranged in a spiral shape along the axial direction of the piston 22, so that adjacent fourth holes 224 can be staggered in the circumferential direction of the piston 22, thereby reducing the interference of the brake fluid flowing between two adjacent fourth holes 224.

[0062] In some embodiments, the diameters of the plurality of fourth holes 224 gradually decrease in a direction away from the third hole 223. Figure 5As shown, the apertures of the plurality of fourth holes 224 on the rear side of each third hole 223 can be gradually reduced in the direction from front to rear. This change can further realize hydraulic step-by-step pressure relief, which is beneficial to improving the stability of the entire pressure relief process.

[0063] In some embodiments, Figure 1 As shown, one end of the first pipeline 3 is connected to the power assist assembly 2, and one end of the first pipeline 3 is connected to the second pipeline 4, and the connection between the first pipeline 3 and the second pipeline 4 is located between the container 1 and the valve 5. Thus, a part of the second pipeline 4 can be shared, thereby simplifying the overall pipeline layout.

[0064] The following describes a vehicle according to an embodiment of the present invention.

[0065] The vehicle of the embodiment of the utility model includes a braking system, and the braking system can be a braking system as described in any of the above embodiments. The vehicle can be a car, SUV, bus and other vehicles, and of course, it can also be other vehicles equipped with a braking system.

[0066] When the vehicle of the embodiment of the utility model is in use, when the driver does not step on the brake pedal and the vehicle is actively braked, the excess brake fluid can be discharged only by the POV valve (valve 5 and second pipeline 4) to control the brake residual pressure.

[0067] When the driver does not step on the brake pedal, and the vehicle brakes actively, the driver steps on the brake pedal again, and the POV valve (valve 5 and second pipeline 4) and the PSU fluid filling port (first pipeline 3) can cooperate to discharge excess brake fluid and control the brake residual pressure.

[0068] When the driver steps on the brake pedal to brake the vehicle, the excess brake fluid can be discharged only from the PSU fluid replenishment port (first pipeline 3) to control the brake residual pressure.

[0069] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A braking system, characterized in that: include: a container for storing brake fluid; A power-assisting assembly and a first pipeline, wherein the first pipeline is connected between the power-assisting assembly and the container; A valve and a second pipeline, wherein the second pipeline is connected between the power-assisting assembly and the container, and the valve is arranged on the second pipeline, and the valve is used to open when the power-assisting assembly is reset and enable the second pipeline to discharge part of the brake fluid back to the container before the first pipeline.

2. The braking system according to claim 1, characterized in that: The power-assisting assembly has a connecting hole connected to the brake of the wheel, and the connection between the second pipeline and the power-assisting assembly is located between the connecting hole and the connection between the first pipeline and the power-assisting assembly.

3. The braking system according to claim 1, characterized in that: The power assist assembly comprises: A cylinder body, wherein the cylinder body is provided with a first hole and a second hole communicating with an inner cavity of the cylinder body, the first pipeline is connected between the first hole and the container, and the second pipeline is connected between the second hole and the container, The piston is slidably assembled in the cylinder body, the piston is provided with a third hole, and the first pipeline is used to communicate with the inner cavity of the cylinder body through the third hole and the first hole when the piston is reset to a set position.

4. The braking system according to claim 3, characterized in that: The power assist assembly includes two seals, both of which are disposed in the cylinder body and spaced apart along the sliding direction of the piston. Both of the seals are sleeved on the outer peripheral side of the piston, the first hole is located between the two seals, and the second hole is located outside the two seals.

5. The braking system according to claim 3, characterized in that: The piston includes a barrel and a partition, the barrel is slidably assembled in the cylinder body, the partition is arranged in the barrel and divides the inner cavity of the barrel into a first cavity and a second cavity, the first cavity is connected with the inner cavity of the cylinder body, and the third hole is arranged on the barrel wall of the barrel that is connected with the first cavity and passes through the outer peripheral side of the first cavity.

6. The braking system according to claim 3, characterized in that: The piston is provided with a fourth hole, the diameter of the fourth hole is smaller than the diameter of the third hole, the fourth hole and the third hole are arranged at intervals along the sliding direction of the piston, and the fourth hole is connected to the first hole before the third hole during the resetting process of the piston.

7. The braking system according to claim 6, characterized in that: There are a plurality of the fourth holes, and the plurality of the fourth holes are arranged spirally along the sliding direction of the piston.

8. The braking system according to claim 7, characterized in that: The apertures of the plurality of fourth holes gradually decrease in a direction away from the third hole.

9. The braking system according to any one of claims 1 to 8, characterized in that: One end of the first pipeline is connected to the power assist assembly, one end of the first pipeline is connected to the second pipeline, and the connection between the first pipeline and the second pipeline is located between the container and the valve.

10. A vehicle, characterized in that: The invention comprises a braking system as claimed in any one of claims 1 to 9.

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