Single-shaft hydraulic actuator with anti-lock function

Abstract

The utility model belongs to a vehicle brake control system, and particularly relates to a single-shaft hydraulic actuator with an anti-lock function. Comprising a storage container and a pressure generator, the storage container is connected with the pressure generator through a first pipeline, the output end of the pressure generator is connected with a second pipeline, the second pipeline is divided into a first branch and a second branch, the first branch is connected with a left brake, and the second branch is connected with a right brake. The first branch and the second branch are respectively provided with a first isolating valve and a second isolating valve, one end of the third pipeline is connected with the storage container, the first branch is provided with a first bypass, the second branch is provided with a second bypass, the first bypass and the second bypass are connected with the third pipeline, and the third pipeline is connected with the storage container. A first pressure reducing valve is arranged on the first branch, and a second pressure reducing valve is arranged on the second branch; according to the utility model, the brake-by-wire function and the anti-lock function are integrated into one module, and the integration level is high.

Description

Technical Field

[0001] The utility model belongs to the vehicle braking control system, and particularly relates to a single-axis hydraulic actuator with an anti-lock function. Background Technique

[0002] At present, with the development of intelligent driving technology, intelligent application scenarios such as intelligent logistics, intelligent ports, and intelligent mines are gradually improving, and the demand for intelligent driving technology of commercial vehicles is prominent. As the basis of intelligent driving technology, the importance and urgency of wire control braking technology are becoming more and more prominent. At present, the braking system in the commercial vehicle field is mainly a pneumatic braking system, and the pneumatic braking systems of some manufacturers have a wire control function. However, because the pneumatic system relies on compressed air to work, its pressure is low and the response speed is slow, which cannot meet the requirements of intelligent driving for the response speed, especially when the vehicle has a precise positioning requirement. At present, some manufacturers have also developed a hydraulic wire control braking system for commercial vehicles, but it can only be applied to light vehicles and is not applicable to medium and heavy vehicles. And in the current hydraulic wire control system, the wire control braking function and the anti-lock function (ABS) are generally completed by two modules, and its system complexity is high, and the space required for vehicle assembly and the assembly complexity are high. Content of the Utility Model

[0003] In view of the problems existing in the prior art, the utility model designs a single-axis hydraulic actuator with an anti-lock function.

[0004] In order to achieve the above purpose, the utility model is realized by the following technical solutions:

[0005] A single-axis hydraulic actuator with an anti-lock function, characterized in that it includes

[0006] A storage container for storing brake fluid,

[0007] A pressure generator for providing the pressure required for braking,

[0008] The storage container is connected to the pressure generator through a first pipeline, the output end of the pressure generator is connected with a second pipeline, the second pipeline is divided into a first branch and a second branch, the first branch is connected to the left brake, the second branch is connected to the right brake, a first isolation valve and a second isolation valve are respectively arranged on the first branch and the second branch, and a third pipeline is further included, one end of the third pipeline is connected to the storage container, a first bypass is arranged on the first branch, a second bypass is arranged on the second branch, the first bypass and the second bypass are connected to the third pipeline, a first pressure reducing valve is arranged on the first branch, and a second pressure reducing valve is arranged on the second branch.

[0009] Furthermore, a pressure sensor is arranged on the second pipeline at the output end of the pressure generator, and the pressure sensor is used to monitor the actual pressure in the pipeline.

[0010] Furthermore, the first pipeline is further provided with a third branch connected to the pressure generator, and a liquid supplement check valve is provided on the third branch.

[0011] Furthermore, a liquid level sensor is connected to the storage container.

[0012] Furthermore, the pressure generator includes a pressure piston cylinder and a pressure motor connected to the pressure piston cylinder.

[0013] In summary, the present utility model has the following beneficial effects:

[0014] The present utility model designs a single-axis hydraulic actuator with an anti-lock function to be used, which meets the requirements of commercial vehicle intelligent driving for line control braking. At the same time, the line control braking and anti-lock function are integrated into one module, with a high degree of integration, thereby reducing the volume of the product, being flexible in layout on the vehicle, and convenient for assembly. Description of the Drawings

[0015] The disclosure of the present utility model will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present utility model. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0016] Figure 1 is a schematic diagram of the composition of the present utility model;

[0017] In the figure, 1 is a storage container, 10 is a liquid level sensor,

[0018] 2 is a pressure generator, 20 is a pressure piston cylinder, 21 is a pressure motor;

[0019] 3 is a first pipeline, 30 is a third branch, 301 is a liquid supplement check valve,

[0020] 4 is a second pipeline, 40 is a first branch, 41 is a second branch,

[0021] 5 is a left brake, 6 is a right brake,

[0022] 400 is a first isolation valve, 410 is a second isolation valve,

[0023] 7 is a third pipeline, 402 is a first bypass, 412 is a second bypass, 4020 is a first pressure reducing valve, 4120 is a second pressure reducing valve,

[0024] 8 is a pressure sensor. Detailed Embodiments

[0025] It is easy to understand that according to the technical solution of the present utility model, without changing the essence of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation manners. Therefore, the following specific embodiments and the accompanying drawings are only exemplary descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0026] In order to meet the demand of the intelligent driving of commercial vehicles for wire-controlled braking, the present utility model designs a single-axis hydraulic actuator, and at the same time integrates the wire-controlled braking function and the anti-lock braking function into one module to reduce the space required by the system and the complexity of assembly.

[0027] See Figure 1 As shown, the single-axis hydraulic actuator with anti-lock braking function includes

[0028] A storage container 1 for storing brake fluid,

[0029] A pressure generator 2 for providing the pressure required for braking,

[0030] The storage container 1 is connected to the pressure generator 2 through a first pipeline 3. The output end of the pressure generator 2 is connected with a second pipeline 4. The second pipeline 4 is divided into a first branch 40 and a second branch 41. The first branch 40 is connected to the left brake 5, and the second branch 41 is connected to the right brake 6. A first isolation valve 400 and a second isolation valve 410 are respectively provided on the first branch 40 and the second branch 41. It also includes a third pipeline 7. One end of the third pipeline 7 is connected to the storage container 1. A first bypass 402 is provided on the first branch 40, and a second bypass 412 is provided on the second branch 41. The first bypass 402 and the second bypass 412 are connected to the third pipeline 7. A first pressure reducing valve 4020 is provided on the first branch 402, and a second pressure reducing valve 4120 is provided on the second branch 412.

[0031] The present utility model designs a single-axis hydraulic actuator with anti-lock braking function to meet the demand of the intelligent driving of commercial vehicles for wire-controlled braking. At the same time, the wire-controlled braking and anti-lock braking functions are integrated into one module, with high integration degree, thus reducing the volume of the product, being flexible in layout on the vehicle and convenient for assembly.

[0032] Furthermore, a pressure sensor 8 is provided on the second pipeline 4 at the output end of the pressure generator 2. The pressure sensor is used to monitor the actual pressure in the pipeline. During actual use, the actual pressure can be compared with the pressure that the pressure generator should generate. When there is a difference, the pressure generator should make corresponding compensation to achieve closed-loop control of the pressure.

[0033] Furthermore, the first pipeline 3 is also provided with a third branch 30 connected to the pressure generator. A liquid supplement check valve 301 is provided on the third branch. During the braking process, when the amount of brake fluid in the pressure generator is insufficient, brake fluid can be supplemented into the pressure generator through the liquid supplement check valve.

[0034] Furthermore, a liquid level sensor 10 is connected to the storage container 1. The provided liquid level sensor is used to detect the height of the liquid level of the brake fluid in the storage container, and an alarm is issued when the liquid level of the brake fluid is lower than the alarm line.

[0035] Furthermore, the pressure generator 2 includes a pressure piston cylinder 20 and a pressure motor 21 connected to the pressure piston cylinder. The pressure motor drives the pressure piston cylinder to move back and forth, and the movement of the pressure piston cylinder drives the output of the brake fluid.

[0036] The working process of the present utility model is as follows:

[0037] 1. Electronic braking function

[0038] After the actuator receives a braking request from the whole vehicle, the pressure generator acts, and conveys the brake fluid through the second pipeline into the left brake and the right brake, thereby establishing a braking pressure and performing a braking action. At the same time, the pressure sensor real-time monitors the actual pressure in the pipeline. When receiving a braking release request from the whole vehicle, the pressure generator acts in the reverse direction, and the brake fluid flows back to the pressure generator through the pipeline;

[0039] 2. Anti-lock braking function

[0040] During the braking process, when the controller of the actuator monitors that an anti-lock braking action is required;

[0041] Braking pressure maintenance: The first isolation valve and the second isolation valve are closed to isolate the brake and the pressure generator, so that the braking pressure no longer rises.

[0042] Braking pressure reduction: The first pressure reducing valve and the second pressure reducing valve are opened, so that the brake fluid in the brake is discharged into the storage container, and the braking pressure drops;

[0043] Braking pressure increase: The first isolation valve and the second isolation valve are opened, so that the brake fluid enters the brake, and the braking pressure rises.

[0044] During this process, the pressure generator maintains the pressure in the system at a certain level higher than the braking pressure. If the execution time of the anti-lock braking process is relatively long and the amount of brake fluid discharged into the storage container is large, resulting in insufficient brake fluid in the pressure generator, at this time, the first isolation valve and the second isolation valve are closed, the pressure generator acts in the reverse direction, and the liquid supplement check valve is opened to supplement the brake fluid in the pressure generator.

[0045] In summary, the utility model has the following beneficial effects:

[0046] The utility model designs a single-axis hydraulic actuator with a standby anti-lock braking function, which meets the demand for wire control braking in intelligent driving of commercial vehicles. At the same time, the wire control braking and anti-lock braking functions are integrated into one module with high integration, thereby reducing the size of the product, making it flexible to arrange on the vehicle and easy to assemble.

[0047] The technical scope of the present invention is not limited to the contents described above. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical concept of the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A single-axis hydraulic actuator with an anti-lock function, characterized in that: including a storage container for storing brake fluid, a pressure generator for providing the pressure required for braking, the storage container is connected to the pressure generator through a first pipeline, the output end of the pressure generator is connected with a second pipeline, the second pipeline is divided into a first branch and a second branch, the first branch is connected to the left brake, the second branch is connected to the right brake, a first isolation valve and a second isolation valve are respectively arranged on the first branch and the second branch, and a third pipeline is further included, one end of the third pipeline is connected to the storage container, a first bypass is arranged on the first branch, a second bypass is arranged on the second branch, the first bypass and the second bypass are connected to the third pipeline, a first pressure reducing valve is arranged on the first branch, and a second pressure reducing valve is arranged on the second branch.

2. The single-axis hydraulic actuator with an anti-lock function according to claim 1, characterized in that: A pressure sensor is arranged on the second pipeline at the output end of the pressure generator, and the pressure sensor is used for monitoring the actual pressure in the pipeline.

3. The single-axis hydraulic actuator with an anti-lock function according to claim 1, characterized in that: A third branch connected to the pressure generator is further arranged on the first pipeline, and a liquid replenishment one-way valve is arranged on the third branch.

4. The single-axis hydraulic actuator with an anti-lock function according to any one of claims 1-3, characterized in that: A liquid level sensor is connected to the storage container.

5. The single-axis hydraulic actuator with an anti-lock function according to claim 4, characterized in that: The pressure generator includes a pressure piston cylinder and a pressure motor connected to the pressure piston cylinder.

Images