Automobile brake auxiliary structure

Abstract

The automobile brake auxiliary structure comprises the brake master cylinder and the vacuum booster connected with the brake master cylinder, the vacuum booster is connected with the vacuum auxiliary assembly, and the vacuum auxiliary assembly can provide vacuum for the vacuum booster to avoid insufficient vacuum boosting, so that a brake pedal is prevented from being stiff, a driver is prevented from strenuous operation, and the service life of the automobile brake auxiliary structure is prolonged. Compared with the prior art, the automobile brake auxiliary structure has the advantages that the vacuum booster can be guaranteed to work normally, insufficient vacuum boosting is avoided, a brake pedal is prevented from being stiff, a driver is prevented from consuming labor during operation, and the brake distance is prevented from being lengthened.

Description

Technical Field

[0001] The utility model belongs to the field of automobile braking, and specifically relates to an automobile braking auxiliary structure. Background Art

[0002] As an important part of the car, the brake system directly affects the safety of the car. The brake system is mainly composed of the brake pedal, vacuum booster, brake master cylinder, and brake assembly. The force of stepping on the brake pedal is amplified by the vacuum booster and acts on the brake master cylinder. After passing through the brake master cylinder, the force is transmitted to the wheel cylinder in the form of hydraulic pressure and further amplified. Finally, the hydraulic pressure acts on the brake, and the brake action forms a braking torque for the wheel. Under the interaction between the tire and the road surface, the braking force is formed and the vehicle is decelerated. Among them, the brake vacuum source provided by the engine plays an important role. If the vacuum provided is insufficient, the brake pedal will become stiff and the braking distance will become longer. In case of emergency, it may cause safety hazards and affect driving safety. At present, the vacuum source of the vacuum booster with the brake master cylinder assembly is provided by the engine. The size of the vacuum depends on the engine load, such as water temperature, oil temperature, air conditioning compressor, generator, altitude, and the increase in the number and power of electrical appliances. Under some special working conditions, it is easy to increase the engine load power, reduce the ability of the engine to provide vacuum, and insufficient vacuum assistance, which can easily cause the brake pedal to become stiff, the driver to work hard, and the braking distance to become longer.

[0003] To solve the above problems, patent document 221605785U discloses a vacuum booster assembly, which includes: a booster tube and a booster housing, a movable rod movably installed inside one end of the booster tube, and a pedal is provided at one end of the movable rod; the other end of the booster tube is connected to the inside of the booster housing, a vacuum tube is installed on one side of the booster housing, and one end of the vacuum tube is connected to the braking system; the inside of the booster housing is divided into a left chamber and a right chamber, and the left chamber and the right chamber are separated by an elastic movable flap; a damping component is provided on the part of the right chamber at the middle position of the movable flap; and a boosting component is installed inside the booster tube at the same time; the vacuum booster assembly is provided with a damping component inside the booster housing and a boosting component is installed inside the booster tube, so that when the vacuum booster damping is generated by pedaling, there will be a quadruple damping effect, but the above problems cannot be solved. Utility Model Content

[0004] The utility model is designed to solve the above problems, and aims to provide a vehicle brake assist structure that can ensure the normal operation of the vacuum booster, avoid the problem of insufficient vacuum boost, stiff brake pedal, driver's laborious operation and longer braking distance. In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] The present utility model provides an automobile braking assist structure, which has the following features: it includes a brake master cylinder and a vacuum booster connected to the brake master cylinder, and the vacuum booster is connected with a vacuum assist component.

[0006] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: the vacuum booster is connected to the automobile engine.

[0007] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: a first vacuum tube is provided between the vacuum booster and the automobile engine, one end of the first vacuum tube is connected to the vacuum booster, and the other end of the first vacuum tube is connected to the automobile engine.

[0008] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: the vacuum assist component includes a second vacuum tube and an electronic vacuum pump, one end of the second vacuum tube is connected to the vacuum booster, and the other end of the second vacuum tube is connected to the electronic vacuum pump.

[0009] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: the vacuum degree (absolute pressure) of the opening threshold of the electronic vacuum pump is 45%×P, where P is the local ambient atmospheric pressure.

[0010] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: the vacuum degree (absolute pressure) of the closing threshold of the electronic vacuum pump is 30%×P, where P is the local ambient atmospheric pressure.

[0011] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: the vacuum booster is provided with a connecting pipe, one end of the connecting pipe is connected to the vacuum booster, and the other end of the connecting pipe is connected to the automobile engine.

[0012] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: a vacuum tube pressure sensor is provided on the connecting pipe.

[0013] In the automobile braking assist structure provided by the present utility model, it may further have the following feature: a one-way valve is provided on the connecting pipe.

[0014] The technical effect of the present utility model is as follows: the automobile braking assist structure provided by the present utility model includes a brake master cylinder and a vacuum booster connected to the brake master cylinder, and the vacuum booster is connected with a vacuum assist component. The vacuum assist component can provide vacuum for the vacuum booster, avoid insufficient vacuum assistance, thereby avoid a stiff brake pedal, avoid the driver exerting effort during operation, avoid an extended braking distance, and ensure the normal operation of the automobile braking process.

[0015] Therefore, the automotive braking assist structure provided by the present utility model can ensure the normal operation of the vacuum booster, avoid insufficient vacuum assistance, avoid a stiff brake pedal, avoid the driver exerting excessive effort during operation, and avoid an extended braking distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] This specification includes the following drawings, which respectively show:

[0017] Figure 1 It is a schematic structural diagram of the automotive braking assist structure in an embodiment of the present utility model.

[0018] The markings in the figure are: 10 - master cylinder, 20 - vacuum booster, 30 - vacuum assist component, 31 - second vacuum tube, 32 - electric vacuum pump, 40 - first vacuum tube, 50 - connecting tube, 51 - vacuum tube pressure sensor, 52 - check valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following is a more detailed description of the specific embodiments of the present invention with reference to the accompanying drawings through the description of the embodiments, aiming to help those skilled in the art have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0020] Figure 1 It is a schematic structural diagram of the automotive braking assist structure in an embodiment of the present utility model.

[0021] As Figure 1 shown, the automotive braking assist structure provided by the present utility model includes a master cylinder 10 and a vacuum booster 20 connected to the master cylinder 10. The vacuum booster 20 is connected to a vacuum assist component 30, and the vacuum assist component 30 can provide vacuum for the vacuum booster 20, avoiding insufficient vacuum assistance, thereby avoiding a stiff brake pedal, avoiding the driver exerting excessive effort during operation, avoiding an extended braking distance, and ensuring the normal operation of the automotive braking process.

[0022] The vacuum booster 20 is connected to the automotive engine. A first vacuum tube 40 is provided between the vacuum booster 20 and the automotive engine. One end of the first vacuum tube 40 is connected to the vacuum booster 20, and the other end of the first vacuum tube 40 is connected to the automotive engine, enabling the automotive engine to provide vacuum for the vacuum booster 20. The magnitude of the vacuum provided by the engine depends on the engine load conditions, such as atmospheric pressure, water temperature, oil temperature, air conditioning compressor, generator, altitude, and the number and power of electrical appliances. Under some special working conditions, it is easy to increase the engine load power and reduce the engine's ability to provide vacuum.

[0023] The vacuum assist assembly 30 can provide vacuum for the vacuum booster 20, avoiding insufficient vacuum assistance, thus avoiding a stiff brake pedal, making it easier for the driver to operate, preventing the braking distance from becoming longer, and ensuring the normal operation of the vehicle braking process. The vacuum assist assembly 30 includes a second vacuum tube 31 and an electric vacuum pump 32. One end of the second vacuum tube 31 is connected to the vacuum booster 20, and the other end of the second vacuum tube 31 is connected to the electric vacuum pump 32. The electric vacuum pump 32 can provide vacuum for the vacuum booster 20 through the second vacuum tube 31, avoiding the problem of insufficient vacuum assistance caused by excessive engine load and improving the reliability of the structure.

[0024] If the minimum vacuum requirement for the vacuum booster 20 and the braking system is 55 kPa, then the vacuum degree (absolute pressure) of the opening threshold of the electric vacuum pump is 45% × P kPa, where P is the local ambient atmospheric pressure. The vacuum degree (absolute pressure) of the closing threshold of the electric vacuum pump is 30% × P kPa, where P is the local ambient atmospheric pressure. This ensures that the electric vacuum pump 32 can respond quickly, ensuring that the vacuum booster 20 can operate normally, improving the reliability of the structure, avoiding insufficient vacuum assistance, avoiding a stiff brake pedal, making it easier for the driver to operate, preventing the braking distance from becoming longer, and ensuring the normal operation of the vehicle braking process.

[0025] The vacuum booster 20 is provided with a connecting pipe 50. One end of the connecting pipe 50 is connected to the vacuum booster 20, and the other end of the connecting pipe 50 is connected to the vehicle engine, thus connecting the vacuum booster 20 and the vehicle engine. A vacuum tube pressure sensor 51 and a one-way valve 52 are provided on the connecting pipe 50. The vacuum tube pressure sensor 51 can detect the magnitude of the vacuum pressure in the connecting pipe 50, thereby detecting the pressure magnitude in the vacuum booster 20. The vacuum tube pressure sensor 51 is connected to the electric vacuum pump 32, facilitating the control of the start or stop of the electric vacuum pump 32, enabling the electric vacuum pump 32 to respond quickly and supplement the vacuum assistance, avoiding the problem of insufficient vacuum assistance. The one-way valve 52 can prevent backflow in the connecting pipe 50 and avoid vacuum leakage, further improving the reliability of the structure.

[0026] Functions and effects of the embodiment

[0027] The automotive braking assistance structure provided by the present utility model includes a master cylinder 10 and a vacuum booster 20 connected to the master cylinder 10. The vacuum booster 20 is connected with a vacuum assistance component 30, and the vacuum assistance component 30 can provide vacuum for the vacuum booster 20, avoiding insufficient vacuum assistance, thereby avoiding a stiff brake pedal, avoiding the driver exerting effort during operation, avoiding an extended braking distance, and ensuring the normal operation of the automotive braking process. A vacuum tube pressure sensor 51 is connected to an electronic vacuum pump 32, facilitating the control of the start or stop of the electronic vacuum pump 32, enabling the electronic vacuum pump 32 to respond quickly and supplement the vacuum assistance, thus avoiding the problem of insufficient vacuum assistance. A check valve 52 can prevent backflow in the connecting pipe 50 and avoid vacuum leakage, further improving the reliability of the structure. The automotive braking assistance structure provided by the present utility model can ensure the normal operation of the vacuum booster, avoid insufficient vacuum assistance, avoid a stiff brake pedal, avoid the driver exerting effort during operation, and avoid the problem of an extended braking distance.

[0028] The above has made an exemplary description of the present utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, directly applying the above concept and technical solution of the present utility model to other occasions, they are all within the protection scope of the present utility model.

Claims

1. An automotive braking assist structure, characterized in that, It includes a master brake cylinder (10) and a vacuum booster (20) connected to the master brake cylinder (10), and a vacuum assist component (30) is connected to the vacuum booster (20).

2. The automotive braking assistance structure according to claim 1, wherein, The vacuum booster (20) is connected to an automotive engine.

3. The automotive braking assistance structure according to claim 2, wherein A first vacuum tube (40) is provided between the vacuum booster (20) and the automotive engine. One end of the first vacuum tube (40) is connected to the vacuum booster (20), and the other end of the first vacuum tube (40) is connected to the automotive engine.

4. The automotive braking assist structure according to claim 3, wherein, The vacuum assist component (30) includes a second vacuum tube (31) and an electric vacuum pump (32). One end of the second vacuum tube (31) is connected to the vacuum booster (20), and the other end of the second vacuum tube (31) is connected to the electric vacuum pump (32).

5. The automotive braking assistance structure according to claim 4, wherein, The vacuum degree of the opening threshold of the electric vacuum pump (32) is 45%×P, where P is the local ambient atmospheric pressure.

6. The automotive braking assistance structure according to claim 4, wherein, The vacuum degree of the closing threshold of the electric vacuum pump (32) is 30%×P, where P is the local ambient atmospheric pressure.

7. The automotive braking assistance structure according to claim 1, characterized in that, The vacuum booster (20) is provided with a connecting pipe (50). One end of the connecting pipe (50) is connected to the vacuum booster (20), and the other end of the connecting pipe (50) is connected to the automotive engine.

8. The automotive braking assistance structure according to claim 7, characterized in that, A vacuum tube pressure sensor (51) is provided on the connecting pipe (50).

9. The automotive braking assistance structure according to claim 7, characterized in that, A check valve (52) is provided on the connecting pipe (50).

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