Automobile hydraulic brake cylinder

Abstract

The utility model discloses an automobile hydraulic brake cylinder which comprises a hydraulic brake cylinder body, a limiting sliding rod is fixedly installed at the upper end of the hydraulic brake cylinder body, brake pads are movably connected to the outer curved surfaces of the two sides of the limiting sliding rod in an attached mode, and a main oil cylinder is arranged on the inner side of the middle of the hydraulic brake cylinder body. A main piston is movably connected to the inner wall of each main oil cylinder in an attached mode, a main return spring is fixedly installed on the outer side of each main piston, and through oil holes used for connecting the main oil cylinders in series are formed in the middles of the main oil cylinders in a penetrating mode. A main oil inlet pipe is fixedly installed at the outer side end of the hydraulic brake cylinder body, the side end of the main oil inlet pipe is fixedly communicated with an auxiliary oil inlet pipe, and an auxiliary oil cylinder is fixedly installed on the outer side of the lower end of the hydraulic brake cylinder body in a supporting mode. According to the utility model, the main oil cylinder can be compensated in time while the automobile brake disc is braked, so that the gap between the brake pad and the automobile brake disc is prevented from being enlarged after the brake pad is abraded.

Description

Technical Field

[0001] This utility model relates to the field of automotive braking system technology, specifically to automotive hydraulic brake cylinders. Background Technology

[0002] The automotive braking system is a core component ensuring safe vehicle operation. It converts the vehicle's kinetic energy into heat energy or other forms of energy to achieve deceleration or parking. The hydraulic brake caliper is a core component of the automotive braking system, also known as a brake wheel cylinder or caliper. Its main function is to convert the hydraulic energy transmitted from the master cylinder into mechanical thrust, pushing the brake pads against the brake disc or brake drum to generate friction, thereby achieving vehicle deceleration or stopping.

[0003] The main functions of a hydraulic brake caliper include: converting the hydraulic energy generated by the master cylinder into mechanical thrust to push the brake pads and achieve braking; using a piston to push the brake pads into contact with the brake disc or brake drum, generating friction to slow or stop the vehicle; sealing rings to prevent brake fluid leakage and ensure the normal operation of the braking system; and a return spring to ensure the piston quickly returns to its original position after braking, preventing brake drag. In a disc brake system, the caliper directly pushes the brake pads to clamp the brake disc. In a drum brake system, the caliper pushes the brake shoes open via a top block, allowing the brake pads to contact the brake drum.

[0004] However, in actual use, the clearance compensation of disc-type hydraulic brake calipers has a certain lag during use. It needs to be compensated manually or electronically after the brake pads wear out, which will result in a response delay, leading to brake drag (energy consumption increased by 5%-8%) or brake distance fluctuation (±5%), thus affecting the performance of the brake. Utility Model Content

[0005] The purpose of this utility model is to provide a hydraulic brake caliper for automobiles, in order to solve the problem that the disc-type hydraulic brake caliper mentioned in the background art has a certain lag in clearance compensation during use. It needs to be manually or electronically adjusted and compensated after the brake pads wear, which will result in a response delay, leading to brake drag (energy consumption increased by 5%-8%) or brake distance fluctuation (±5%), thus affecting the performance of the brake.

[0006] To achieve the above objectives, this utility model provides the following technical solution: it includes a hydraulic brake slave pump body, a limit slide rod is fixedly installed on the upper end of the hydraulic brake slave pump body, brake pads are movably connected to the outer curved surfaces on both sides of the limit slide rod, a main oil cylinder is opened on the inner side of the middle part of the hydraulic brake slave pump body, a main piston is movably connected to the inner wall of the main oil cylinder, a main return spring is fixedly installed on the outer side of the main piston, and a through oil hole for connecting the main oil cylinders together is opened through the middle part of the main oil cylinder;

[0007] A main oil inlet pipe is fixedly installed on the outer side of the main body of the hydraulic brake pump. A secondary oil inlet pipe is fixedly connected to the side end of the main oil inlet pipe. A secondary cylinder is fixedly installed on the outer side of the lower end of the main body of the hydraulic brake pump. A matching port is fixedly connected to the outer side of the upper end of the secondary cylinder. A secondary piston is movably connected to the inner wall of the upper end of the secondary cylinder. A secondary return spring is fixedly installed on the upper end of the secondary piston. A one-way solenoid valve is fixedly connected to the upper end of the secondary cylinder. A distributor pipe is fixedly connected to the front end of the one-way solenoid valve. A distributor port is fixedly connected to the inner side of the distributor pipe.

[0008] Preferably, there are two limiting slide bars, which are symmetrically distributed on the upper end of the hydraulic brake pump body.

[0009] Preferably, there are several main hydraulic cylinders, and several main hydraulic cylinders form a group. The two groups of main hydraulic cylinders are symmetrically distributed on the inner side of the middle part of the hydraulic brake pump body.

[0010] Preferably, a main sealing ring is fixedly installed on the outer curved surface of the main piston, and the inner side of the main piston is fixedly connected to the outer side of the brake pad.

[0011] Preferably, the outer side of the main return spring is fixedly installed on the inner wall of the main oil cylinder, the rear end of the main oil inlet pipe is connected to the main oil cylinder, and the front end of the main oil inlet pipe is connected to the automotive hydraulic brake master cylinder through a connecting oil pipe.

[0012] Preferably, the diameter of the auxiliary cylinder is smaller than that of the main cylinder, and there are two auxiliary cylinders, which are symmetrically distributed on the outer side of the lower end of the hydraulic brake pump body.

[0013] Preferably, the interface is connected to the auxiliary oil inlet pipe via a connecting oil pipe, and an auxiliary sealing ring is fixedly installed on the outer curved surface of the auxiliary piston.

[0014] Preferably, the upper top of the secondary return spring is fixedly installed at the inner top of the secondary oil cylinder, and there are several oil distribution ports, which are fixedly connected to the outer end of the main oil cylinder.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] When hydraulic oil passes through the main inlet pipe, it enters the auxiliary cylinder through the secondary inlet pipe and connecting pipe. Upon entering the auxiliary cylinder, the hydraulic oil pressure pushes the auxiliary piston downwards along the inner wall of the cylinder. This downward movement stretches the auxiliary return spring. When the brake pads move outwards to brake the brake disc, a one-way solenoid valve is opened. When the solenoid valve opens, the elastic potential energy generated by the stretching deformation of the auxiliary return spring pushes the auxiliary piston upwards. During the upward linear movement, the hydraulic oil inside the auxiliary cylinder, pushed by the auxiliary piston, enters the distributor pipe through the one-way solenoid valve and then enters the main cylinder through the distributor port. This allows the hydraulic oil inside the auxiliary cylinder to compensate for the pressure inside the main cylinder, ensuring that the brake pads maintain a constant contact pressure with the car's brake disc. At the same time, when the main piston returns to its original position under the action of the main return spring, the one-way solenoid valve locks the hydraulic oil backflow. Thus, while braking the car's brake disc, the main cylinder can be compensated in a timely manner, preventing the gap between the brake pads and the car's brake disc from increasing due to brake pad wear. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the automotive hydraulic brake slave pump of this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the overall structure of the automotive hydraulic brake slave pump of this utility model;

[0019] Figure 3 This is a partial cross-sectional view of the hydraulic brake slave pump of this utility model.

[0020] In the diagram: 1. Hydraulic brake slave cylinder body; 2. Limiting slide bar; 3. Brake pad; 4. Main cylinder; 5. Main piston; 6. Main return spring; 7. Through oil hole; 8. Main oil inlet pipe; 9. Auxiliary oil inlet pipe; 10. Auxiliary cylinder; 11. Connecting port; 12. Auxiliary piston; 13. Auxiliary return spring; 14. One-way solenoid valve; 15. Distribution pipe; 16. Distribution port. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3This utility model provides a technical solution for a hydraulic brake caliper for automobiles: it includes a hydraulic brake caliper body 1, with two limiting slide rods 2 fixedly installed on the upper end of the hydraulic brake caliper body 1, symmetrically distributed on the upper end of the hydraulic brake caliper body 1. Brake pads 3 are movably connected to the outer curved surfaces on both sides of the limiting slide rods 2, so that the brake pads 3 are linearly limited by the limiting slide rods 2. A main cylinder 4 is provided on the inner side of the middle of the hydraulic brake caliper body 1, and there are several main cylinders 4, which are grouped together. Two groups of main cylinders 4 are respectively connected by... The hydraulic brake slave cylinder body 1 is symmetrically distributed on the inner side of the middle. The main piston 5 is movably connected to the inner wall of the main cylinder 4, and the main sealing ring is fixedly installed on the outer curved surface of the main piston 5. The inner side of the main piston 5 is fixedly connected to the outer side of the brake pad 3, so that the outer side of the brake pad 3 is supported by the main piston 5. The main return spring 6 is fixedly installed on the outer side of the main piston 5, and the outer side of the main return spring 6 is fixedly installed on the inner wall of the main cylinder 4, so that the main piston 5 is elastically connected by the main return spring 6. A through oil hole 7 for connecting the main cylinders 4 together is opened through the middle of the main cylinder 4.

[0023] A main oil inlet pipe 8 is fixedly installed on the outer end of the hydraulic brake slave cylinder body 1, and the rear end of the main oil inlet pipe 8 is connected to the master cylinder 4. The front end of the main oil inlet pipe 8 is connected to the vehicle's hydraulic brake master cylinder through a connecting oil pipe. A secondary oil inlet pipe 9 is fixedly connected to the side end of the main oil inlet pipe 8. A secondary cylinder 10 is fixedly installed on the lower outer side of the hydraulic brake slave cylinder body 1, and the diameter of the secondary cylinder 10 is smaller than that of the master cylinder 4. There are two secondary cylinders 10, which are symmetrically distributed on the lower outer side of the hydraulic brake slave cylinder body 1. A connecting port 11 is fixedly connected to the upper outer side of the secondary cylinder 10, and the connecting port 11 is connected to the secondary oil inlet pipe 9 through a connecting oil pipe. The auxiliary cylinder 10 is connected to the main cylinder 4. The auxiliary piston 12 is movably connected to the inner wall of the upper end of the auxiliary cylinder 10. The auxiliary piston 12 has a secondary sealing ring fixedly installed on its outer curved surface. The auxiliary piston 12 has a secondary return spring 13 fixedly installed on its upper end. The upper top of the secondary return spring 13 is fixedly installed on the inner top of the auxiliary cylinder 10, so that the auxiliary cylinder 10 is elastically connected through the secondary return spring 13. The upper end of the auxiliary cylinder 10 is fixedly connected to a one-way solenoid valve 14. The front end of the one-way solenoid valve 14 is fixedly connected to an oil distribution pipe 15. The inner side of the oil distribution pipe 15 is fixedly connected to an oil distribution port 16. There are several oil distribution ports 16, which are fixedly connected to the outer end of the main cylinder 4.

[0024] Working principle: When in use, the driver presses the brake pedal. When the driver presses the brake pedal, the hydraulic master cylinder of the car will press hydraulic oil into the master cylinder 4 through the connecting oil pipe and the main oil inlet pipe 8. When the hydraulic oil is pressed into the master cylinder 4, the pressure of the hydraulic oil will push the master piston 5 to move outward linearly along the inner wall of the master cylinder 4. When the master piston 5 moves outward linearly, it will push the brake pad 3 to move outward linearly. When the brake pad 3 moves outward linearly, the car's brake disc can be braked.

[0025] Simultaneously, when hydraulic oil passes through the main inlet pipe 8, it enters the auxiliary cylinder 10 through the secondary inlet pipe 9 and connecting pipe. When the hydraulic oil enters the auxiliary cylinder 10, the pressure of the hydraulic oil pushes the auxiliary piston 12 downwards along the inner wall of the auxiliary cylinder 10. As the auxiliary piston 12 moves downwards, it stretches the auxiliary return spring 13. When the brake pad 3 moves outwards to brake the vehicle's brake disc, the one-way solenoid valve 14 is opened. When the one-way solenoid valve 14 opens, the elastic potential energy generated by the stretching deformation of the auxiliary return spring 13 pushes the auxiliary piston 12 upwards in the opposite direction. When moving upwards in a straight line, the hydraulic oil inside the auxiliary cylinder 10, pushed by the auxiliary piston 12, enters the distributor pipe 15 through the one-way solenoid valve 14 and then enters the main cylinder 4 through the distributor port 16. This allows the hydraulic oil inside the auxiliary cylinder 10 to compensate the main cylinder 4, ensuring that the brake pad 3 and the car brake disc maintain a constant contact pressure. At the same time, when the main piston 5 returns to its original position under the action of the main return spring 6, the one-way solenoid valve 14 locks the hydraulic oil backflow. This achieves the simultaneous braking of the car brake disc and timely compensation of the main cylinder 4, preventing the gap between the brake pad 3 and the car brake disc from increasing due to wear.

[0026] 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.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic brake master cylinder for a vehicle, characterized by: Including hydraulic brake master cylinder body (1), the upper end of the hydraulic brake master cylinder body (1) is fixedly installed with a limit slide rod (2), the outer curved surface of the limit slide rod (2) is movably connected with a brake pad (3), the inner side of the middle part of the hydraulic brake master cylinder body (1) is provided with a main oil cylinder (4), the inner wall of the main oil cylinder (4) is movably connected with a main piston (5), the outer side of the main piston (5) is fixedly installed with a main return spring (6), the middle part of the main oil cylinder (4) is provided with a through oil hole (7) for connecting the main oil cylinder (4) together. The outer side end of the hydraulic brake master cylinder body (1) is fixedly installed with a main oil inlet pipe (8), the side end of the main oil inlet pipe (8) is fixedly communicated with a secondary oil inlet pipe (9), the lower end of the outer side of the hydraulic brake master cylinder body (1) is fixedly supported and installed with a secondary oil cylinder (10), the upper end of the outer side of the secondary oil cylinder (10) is fixedly communicated with a docking port (11), the inner wall of the upper end of the secondary oil cylinder (10) is movably connected with a secondary piston (12), the upper end of the secondary piston (12) is fixedly installed with a secondary return spring (13), the upper end of the secondary oil cylinder (10) is fixedly communicated with a one-way electromagnetic valve (14), the front end of the one-way electromagnetic valve (14) is fixedly communicated with a oil distribution pipe (15), the inner side of the oil distribution pipe (15) is fixedly connected with an oil distribution port (16).

2. The automotive hydraulic brake master cylinder according to claim 1, characterized in that: The number of the limit slide rod (2) is two, which are symmetrically distributed on the upper end of the hydraulic brake master cylinder body (1).

3. The automotive hydraulic brake master cylinder according to claim 2, characterized in that: The number of the main oil cylinder (4) is several, and the several main oil cylinders (4) form a group, and two groups of main oil cylinders (4) are symmetrically distributed on the inner side of the middle part of the hydraulic brake master cylinder body (1).

4. The automotive hydraulic brake master cylinder according to claim 3, characterized in that: The outer curved surface of the main piston (5) is fixedly installed with a main sealing ring, and the inner side of the main piston (5) is fixedly connected with the outer side of the brake pad (3).

5. The automotive hydraulic brake master cylinder according to claim 4, characterized in that: The outer side of the main return spring (6) is fixedly installed on the inner wall of the main oil cylinder (4), the rear end of the main oil inlet pipe (8) is communicated with the main oil cylinder (4), and the front end of the main oil inlet pipe (8) is communicated with the automobile hydraulic brake master cylinder through a connecting oil pipe.

6. The automotive hydraulic brake master cylinder according to claim 5, characterized in that: The diameter of the secondary oil cylinder (10) is smaller than that of the main oil cylinder (4), and the number of the secondary oil cylinder (10) is two, which are symmetrically distributed on the outer side of the lower end of the hydraulic brake master cylinder body (1).

7. The automotive hydraulic brake master cylinder according to claim 6, characterized in that: The docking port (11) is communicated with the secondary oil inlet pipe (9) through a connecting oil pipe, and the outer curved surface of the secondary piston (12) is fixedly installed with a secondary sealing ring.

8. The automotive hydraulic brake master cylinder according to claim 7, characterized in that: The upper top end of the secondary return spring (13) is fixedly installed on the inner top end of the secondary oil cylinder (10), and the number of the oil distribution port (16) is several, which are fixedly communicated with the outer ends of the main oil cylinders (4).

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