Active braking device of vehicle hydraulic braking system

Abstract

The utility model discloses an active brake device of a vehicle hydraulic brake system, which comprises a brake master cylinder and a main body support, the inner side of the main body support is rotatably connected with a connecting column, the outer side of the connecting column is fixedly provided with a brake pedal, and the bottom of an oil cylinder piston is fixedly provided with an oil cylinder piston rod. The bottom of the oil cylinder piston rod penetrates through the bottom of the execution oil cylinder and is arranged in the brake master cylinder. According to the active braking device of the vehicle hydraulic braking system, hydraulic energy is input into the execution oil cylinder through the hydraulic pipe, the piston rod of the oil cylinder can be pushed to act on the sliding valve of the brake master pump, vehicle braking work is achieved, variable brake thrust output can be achieved by controlling the input hydraulic energy, the braking effect is changed, and when a brake pedal is treaded, the brake pedal is driven to rotate. The braking principle and characteristics of an original factory can be kept unchanged, normal operation of a traditional braking mode is ensured, and diversity of the braking mode is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle hydraulic braking systems, specifically an active braking device for a vehicle hydraulic braking system. Background Technology

[0002] The current braking method of vehicles involves the driver pressing or stepping on the brake pedal, which pushes the push rod of the master cylinder to move, compressing the brake fluid and transmitting the hydraulic energy through the brake lines to the brake slave cylinders located in the wheel axles, thereby braking the wheels. This braking method is manually operated and controlled, and the braking control method is simple, making it impossible to achieve the function of automatic braking.

[0003] Therefore, this utility model provides an active braking device for a vehicle hydraulic braking system to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an active braking device for a vehicle hydraulic braking system. It can maintain the original manual braking function of the vehicle while also achieving automatic braking. Furthermore, by adjusting the magnitude of the braking force, it can be widely applied to the automatic braking system of unmanned and autonomous vehicles. It also features non-destructive modification, maintaining the original vehicle's braking characteristics and performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an active braking device for a vehicle hydraulic braking system, comprising a master cylinder and a main support. A connecting column is rotatably connected to the inner side of the main support, and a brake pedal is fixedly installed on the outer side of the connecting column. A return spring is provided on the outer side of the connecting column. An active braking device is provided between the master cylinder and the connecting column. The active braking device includes an actuator cylinder, which uses hydraulic and pneumatic actuation as its working medium, both operating on the same principle. A cylinder piston is slidably connected inside the actuator cylinder, and a cylinder piston rod is fixedly installed at the bottom of the cylinder piston. The bottom of the cylinder piston rod penetrates the bottom of the actuator cylinder and is located inside the master cylinder.

[0006] Preferably, a hydraulic pipe is fixedly installed on the side of the actuator cylinder. The hydraulic pipe is fixedly installed on the upper end of the actuator cylinder, and the piston rod of the cylinder generates a thrust. The hydraulic pipe is fixedly installed on the lower end of the actuator cylinder, and the piston rod of the cylinder generates a pull force.

[0007] Preferably, a screw is fixedly installed on the top of the actuator cylinder, an mounting plate is fixedly installed on the outside of the connecting column, a mounting frame is sleeved on the outside of the screw, and a nut is rotatably connected to the bottom of the mounting frame, the nut being screwed onto the outside of the screw.

[0008] Preferably, the mounting frame is located on the outside of the mounting plate, and bolts are inserted between the mounting frame and the mounting plate.

[0009] Preferably, brake oil pipes are fixedly installed on both sides of the brake master cylinder, and a brake master cylinder slide valve is fixedly installed inside the brake master cylinder.

[0010] Beneficial effects

[0011] This invention provides an active braking device for a vehicle hydraulic braking system. Compared with the prior art, it has the following advantages:

[0012] 1. The active braking device of the vehicle's hydraulic braking system inputs hydraulic energy to the actuator cylinder through hydraulic pipes, which can push the cylinder piston rod to act on the brake master cylinder spool valve to realize vehicle braking. Moreover, it can control the input hydraulic energy to realize variable braking thrust output, thereby changing the braking effect. When the brake pedal is pressed, it can maintain the original braking principle and characteristics, ensuring the normal operation of traditional braking methods and realizing the diversity of braking methods.

[0013] 2. The active braking device of the vehicle's hydraulic braking system, relying on components such as servo motors and solenoid valves, can easily start and stop the hydraulic system braking operation, achieving effective control of braking thrust and restoration of the state of each component, thus realizing flexible start and stop of the hydraulic system braking operation.

[0014] 3. The active braking device of the vehicle's hydraulic braking system is equipped with solenoid valve 1 and solenoid valve 2. When the actuator cylinder is in operation and power is suddenly cut off, the two solenoid valves can quickly return to their original positions to maintain hydraulic pressure, ensuring that the actuator cylinder can still perform the braking function when power is cut off, which greatly improves the safety of vehicle driving and effectively copes with situations such as sudden power failure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is an overall structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the hydraulic system structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the thrust connection of the hydraulic cylinder of this utility model;

[0019] Figure 4 This is a schematic diagram of the tension connection of the hydraulic cylinder of this utility model.

[0020] In the diagram: 1. Brake oil pipe; 2. Active braking device; 21. Actuating cylinder; 22. Cylinder piston; 23. Cylinder piston rod; 24. Hydraulic pipe; 25. Return spring; 26. Brake master cylinder spool valve; 3. Brake master cylinder; 4. Brake pedal; 5. Screw; 6. Nut; 7. Mounting frame; 8. Mounting plate; 9. Bolt; 10. Connecting column; 11. Main support. Detailed Implementation

[0021] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0022] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Reference Figures 1 to 4 This application provides an active braking device for a vehicle hydraulic braking system, including a master cylinder 3 and a main support 11. A connecting column 10 is rotatably connected to the inner side of the main support 11, and a brake pedal 4 is fixedly installed on the outer side of the connecting column 10. A return spring 25 is provided on the outer side of the connecting column 10. An active braking device 2 is provided between the master cylinder 3 and the connecting column 10. The active braking device 2 includes an actuator cylinder 21, which uses hydraulic and pneumatic actuation as its working medium, and the two operate on the same principle. A cylinder piston 22 is slidably connected inside the actuator cylinder 21, and a cylinder piston rod 23 is fixedly installed at the bottom of the cylinder piston 22. The bottom of the cylinder piston rod 23 penetrates the bottom of the actuator cylinder 21 and is located inside the master cylinder 3. A hydraulic pipe 24 is fixedly installed on the side of the actuator cylinder 21. The hydraulic pipe 24 is fixedly installed at the upper end of the actuator cylinder 21, and the piston rod 23 generates a thrust. The hydraulic pipe 24 is fixedly installed at the lower end of the actuator cylinder 21, and the piston rod 23 generates a tension.

[0024] A screw 5 is fixedly mounted on the top of the hydraulic cylinder 21. A mounting plate 8 is fixedly mounted on the outside of the connecting column 10. A mounting frame 7 is sleeved on the outside of the screw 5. A nut 6 is rotatably connected to the bottom of the mounting frame 7, and the nut 6 is screwed onto the outside of the screw 5. The mounting frame 7 is located outside the mounting plate 8, and a bolt 9 is inserted between the mounting frame 7 and the mounting plate 8. Brake oil pipes 1 are fixedly mounted on both sides of the brake master cylinder 3, and a brake master cylinder slide valve 26 is fixedly mounted inside the brake master cylinder 3.

[0025] In this embodiment:

[0026] Active braking operation: Hydraulic energy is input to the actuator cylinder 21 through the hydraulic pipe 24, pushing the piston rod 23 of the cylinder downward, so that it acts on one side of the master cylinder valve 26. The master cylinder valve 26 compresses the brake fluid, and through the brake oil pipes 1 on both sides, the brake fluid energy is transmitted to the brake calipers of the tires, thereby realizing the vehicle braking operation.

[0027] Active brake release: The hydraulic energy of the actuator cylinder 21 is unloaded through the hydraulic pipe 24, the piston rod 23 of the cylinder moves upward and returns to its initial state. At the same time, the brake master cylinder slide valve 26 loses the external force loading of the piston rod 23 of the cylinder, the brake hydraulic energy is unloaded, the brake slave cylinder returns to its initial state, and the brake is released.

[0028] Original factory braking operation: When the brake pedal 4 is pressed, the connecting column 10 rotates, which drives the mounting plate 8 to rotate together. The mounting frame 7 and the screw 5 move downward. Since the screw 5 is fixedly connected to the actuator cylinder 21, the actuator cylinder 21 pushes the piston 22 and the cylinder piston rod 23 to move further downward, acting on the brake master cylinder slide valve 26, so that the original factory braking principle and transmission characteristics remain unchanged.

[0029] Factory brake release: Release the brake pedal. Under the action of the return spring 25, the interaction forces between the pedal 4, connecting column 10, piston rod 24 and other components are eliminated, and the brake fluid is also cleared at the same time, thus releasing the original vehicle brake.

[0030] Hydraulic system braking operation start: The servo motor receives the start command and starts working, driving the hydraulic pump to provide hydraulic energy. Solenoid valve 1 opens, and the hydraulic energy passes through solenoid valve 1 and pipeline to actuate cylinder 21. The piston rod 23 of the cylinder extends, thereby generating braking thrust. By giving the servo motor the command speed, the variable hydraulic energy is realized, which changes the extension speed and thrust of the piston rod 23 of the cylinder, further realizing variable braking thrust output.

[0031] Hydraulic system braking is released: the servo motor stops working, and solenoid valves 1 and 2 are opened simultaneously, so that all hydraulic energy in the hydraulic pipeline is unloaded, the oil flows back to the oil tank, and the piston rod 23 of the cylinder loses the thrust generated by the hydraulic energy and returns to its initial state.

[0032] Due to the configuration of solenoid valve 1 and solenoid valve 2, when the hydraulic cylinder 21 is in working state and power is suddenly cut off, the two solenoid valves have a rapid return function, which enables the hydraulic energy to be maintained. This allows the hydraulic cylinder 21 to still perform the braking function even when power is cut off, thus preserving the braking capacity and ensuring that the vehicle can maintain the braking state in the event of a sudden power failure, which greatly improves the safety of vehicle driving.

[0033] This embodiment also includes a reserved oil port, which can be used to extend the functionality to include actions such as those performed by the clutch pedal and accelerator pedal. This design opens up possibilities for automated control of other vehicle systems, further enhancing the overall automation level and functional versatility of the vehicle. For example, in future applications, the reserved oil port could be used to enable automatic clutch control, improving shift smoothness and efficiency; or to enable automatic throttle adjustment, working in conjunction with an autonomous driving system to achieve more precise vehicle speed control.

[0034] like Figure 3 , 4 This embodiment discloses two connection methods for hydraulic hoses of the oil cylinder:

[0035] The connection method of A is as follows: when the hydraulic pipe 24 is connected to the lower chamber (rodless chamber) of the actuator cylinder 21, after the hydraulic energy is applied, the piston rod 23 of the cylinder will generate thrust;

[0036] Connection method of B: The hydraulic pipe 24 is connected to the upper chamber (rod chamber) of the actuator cylinder 21. After the hydraulic energy is applied, the piston rod of the cylinder will generate a pulling force.

[0037] This method can be adapted to the special structures of some special vehicles (the vehicle's foot brake pedal setting will result in pushing or pulling the master cylinder).

[0038] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An active braking device for a vehicle hydraulic braking system, comprising a master cylinder (3) and a main support (11), characterized in that: The inner side of the main support (11) is rotatably connected to a connecting column (10), and a brake pedal (4) is fixedly installed on the outer side of the connecting column (10). A return spring (25) is provided on the outer side of the connecting column (10). An active braking device (2) is provided between the brake master cylinder (3) and the connecting column (10). The active braking device (2) includes an actuator cylinder (21). The actuator cylinder (21) uses hydraulic and pneumatic motion as working media, and the two have the same principle. A cylinder piston (22) is slidably connected inside the actuator cylinder (21). A cylinder piston rod (23) is fixedly installed at the bottom of the cylinder piston (22). The bottom of the cylinder piston rod (23) passes through the bottom of the actuator cylinder (21) and is located inside the brake master cylinder (3).

2. The active braking device of a vehicle hydraulic braking system according to claim 1, characterized in that: A hydraulic pipe (24) is fixedly installed on the side of the actuator cylinder (21). The hydraulic pipe (24) is fixedly installed on the upper end of the actuator cylinder (21). The piston rod (23) of the cylinder generates thrust. The hydraulic pipe (24) is fixedly installed on the lower end of the actuator cylinder (21). The piston rod (23) of the cylinder generates tension.

3. The active braking device of a vehicle hydraulic braking system according to claim 1, characterized in that: A screw (5) is fixedly installed on the top of the actuator cylinder (21), an mounting plate (8) is fixedly installed on the outside of the connecting column (10), a mounting frame (7) is sleeved on the outside of the screw (5), and a nut (6) is rotatably connected to the bottom of the mounting frame (7), and the nut (6) is screwed on the outside of the screw (5).

4. The active braking device of a vehicle hydraulic braking system according to claim 3, characterized in that: The mounting frame (7) is located outside the mounting plate (8), and bolts (9) are inserted between the mounting frame (7) and the mounting plate (8).

5. The active braking device of a vehicle hydraulic braking system according to claim 1, characterized in that: Brake oil pipes (1) are fixedly installed on both sides of the master cylinder (3), and a master cylinder slide valve (26) is fixedly installed inside the master cylinder (3).

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