What are the components of a hydraulic brake device? How does it work?

The hydraulic brake device is composed of brake pedal, brake master cylinder, brake wheel cylinder, wheel brake, brake roller, pipeline, etc. When the brake pedal is pressed, the piston pushes the master cylinder forward. The brake fluid in the cylinder generates pressure, and the oil is pressed into each brake wheel cylinder through the oil pipe.

At this time, the piston of the wheel cylinder opens outward, pushing the brake shoe to contact with the brake drum to produce a braking effect.

It consists of five parts.

1) Power device: Power device refers to the device that can convert the mechanical energy of the prime mover into hydraulic energy, which is the power source of the hydraulic system.

2) Control and adjustment device: its function is to control and adjust the flow direction, pressure and flow of the working medium to ensure the working requirements of the actuator and the working mechanism.

4) Auxiliary devices: In the hydraulic system, other components other than the above devices are called auxiliary devices, such as fuel tanks, filters, accumulators, coolers, pipe fittings, pipe joints and various signal converters.

3. The order of work. How should it be to operate, right, the hydraulic brake device is mainly composed of brake pedal, brake master cylinder, brake wheel cylinder, wheel brake, brake roller, pipeline, etc. At this time, the piston of the wheel cylinder opens outward, and the brake shoe is pushed to contact the brake drum, which will produce a braking effect.

The hydraulic brake device is composed of a brake pedal or handle, a brake oil pump, a brake cylinder, a brake shoe (friction pad), a brake drum (disc), a pipeline, etc.

When the brake pedal or handle is pressed, the oil pump piston is pushed forward. The brake fluid is pressurized, and the oil is pressed into each brake cylinder through the oil pipe. At this time, the piston of the brake cylinder acts, pushing the brake shoe to contact with the brake (disc) to produce a braking effect.

The brake is what is called the brake. It is a mechanical part that stops or slows down a moving part in a machine. It is commonly known as brake and brake.

The brake is mainly composed of a frame, brake parts and control devices. Some brakes are also equipped with an automatic adjustment of the brake clearance. In order to reduce the braking torque and structural size, the brake is usually installed on the high-speed shaft of the equipment, but the large equipment with high safety requirements (such as mine hoists, elevators, etc.) should be installed on the low-speed shaft close to the working part of the equipment.

Some brakes are standardized, serialized and manufactured in specialist factories.

Hangzhou Libei Electro-Hydraulic Technology Co., Ltd., located in Zhejiang Province Overseas High-level Talent Innovation Park, is a high-tech enterprise in the development of hydraulic and electronic control components and the integrated design, manufacturing, commissioning and maintenance of electro-hydraulic control systems. The main products include digital proportional amplifiers, industrial hydraulic controllers, construction machinery controllers, proportional solenoids, proportional valves, servo valves, multi-way valves, pump automatic test benches, etc., while providing professional construction machinery electro-hydraulic control system solutions and components, as well as integrated design, manufacturing, commissioning and maintenance services of various industrial electro-hydraulic control systems, and selling German brand hydraulic components.

1. The full hydraulic braking system consists of: liquid filling valve, accumulator, foot valve, caliper disc brake (or other forms of brake), as well as brake tail light switch and pressure switch.

etc.; 2. The working principle is that after the pressure oil is supplied to the accumulator through the filling valve, it enters the foot valve, and the foot valve is actually a proportional reversing valve for the foot pedal, and then enters the brake next to the tire. When the braking force is insufficient, the accumulator can supply oil for a short time;

3. There is also a brake in the form of air thrust fluid. A vacuum booster pump on the engine generates a pressure gas that pushes the brake cylinders.

The right side of the brake oil pot enters the brake cylinder, which serves the purpose of increasing force, and then enters the brake. Most brakes today are disc brakes.

Instead of drum brakes.

Composition of the hydraulic braking system:

1. The full hydraulic braking system is composed of: liquid filling valve, accumulator, foot valve, caliper disc brake or other forms of brakes, as well as brake tail light switches, pressure switches, etc.;

2. The working principle is that after the pressure oil is supplied to the accumulator through the filling valve, it enters the foot valve, and the foot valve is actually a proportional reversing valve for the foot pedal, and then enters the brake next to the tire. When the braking force is insufficient, the accumulator can supply oil for a short time;

3. There is also a brake in the form of air thrust fluid. The vacuum booster pump on the engine generates pressure gas, pushes the brake cylinder, and the right side of the brake oil pot enters the brake cylinder, which serves the purpose of increasing force, and then enters the brake. Most of today's brakes are disc brakes rather than drum brakes.

Brake energy supply.

Controls. Transmission.

Brake.

What are the components of a hydraulic brake? How does it work? What are the components of a hydraulic brake?

How does it work? Power supply unit: Consists of various components that provide and regulate the energy required for braking and improving the state of the transmission medium.

Various components used to generate and control the braking effect, such as the brake pedal. Laion Head Transmitter: Includes various components for the transmission of braking energy, such as the main brake cylinder of the brake cylinder wheel brake cylinder head

Parts that impede the movement or tendency of the vehicle. A braking system usually consists of two main parts: the braking mechanism and the brakes.

Principle: The general principle of the operation of the braking system consists of the use of mutual friction between a non-rotating vertical element attached to the body (or frame) and a rotating element connected to the wheel (or to the propeller shaft) to prevent the wheel from turning or turning. When the braking system is not working, there is a distance between the hoof drums, and the wheels and brake drums can rotate freely.

The vehicle should slow down, press the brake pedal, the master cylinder oil flows into the wheel cylinder through the push rod and master cylinder under a certain pressure, and the brake shoe is pushed around the support pin through the piston of both wheels.

The cylinders at the upper end are separated from both sides, and their friction plates are pressed against the inner surface of the brakes. The non-rotating brake shoe creates a friction pair on the rotating brake drum to generate braking force. Release the brakes.

When the brake pedal is released, the brake pedal residual beat will return to its original position, i.e. the brake shoe will be pulled back to its original position, and the braking force will disappear. Hydraulic brake device headlines are made up of brake pedals, brake master cylinders, brake cylinders, brakes, brake rollers, pipelines, etc. When the brake pedal is pressed, the piston pushes the master cylinder forward.

Make sure that the brake fluid in the cylinder generates pressure, and the oil in each cylinder of the brake wheel is pressed down through the oil pipe. The piston of the wheel cylinder opens outward, and pushes the brake shoe to contact the brake drum to produce a braking effect. Primary:

The hydraulic pneumatic transmission device of the brake is mainly composed of brake pedal, brake cylinder, fuel tank, ejector, air storage tank, air compressor, brake wheel cylinder, brake control valve, air chamber, auxiliary cylinder, safety cylinder and other parts.

The hydraulic braking system is mainly composed of brake pedal, vacuum booster pump, brake master cylinder (also known as brake master cylinder), brake fluid (also known as brake fluid), brake oil pipe, ABS pump assembly, brake cylinder (also known as brake wheel cylinder) and wheel brake. Mintan.

The structure of the hydraulic braking system of the general family car is mainly composed of the brake pedal, vacuum booster pump, brake master cylinder (also known as brake master cylinder), brake fluid (also known as brake fluid), brake oil pipe, ABS pump assembly, brake cylinder (also known as brake wheel cylinder) and wheel brake.

There are three types of braking pipeline layout of the braking system, and the cross arrangement type is commonly used in cars, so that when one pipeline leaks, the other pipeline still plays a braking role, and the braking force is also relatively balanced, which can effectively avoid braking deviation.

The basic working principle of a hydraulic braking system is that the brake master cylinder, brake fluid, sub-cylinder and connecting oil lines are filled with brake fluid (also known as brake fluid), and they form a closed pressure transfer system.

When the brake pedal is pressed, the piston that pushes the master cylinder moves forward, the pressure of the brake fluid in the master cylinder rises, enters the sub-cylinder of each wheel through the oil pipe, and pushes the piston of the sub-cylinder to expand outward, realizes the transmission of the force of foot braking to the wheel brake, and pushes the wheel brake to implement braking.

When the brake pedal is released, the master cylinder piston returns under the action of oil pressure and return spring, and the cylinder piston and wheel brake brake return to position to release the brake on the wheel.

The following is a description of the role and structure of these components: The brake pedal is one of the most common parts that the driver comes into contact with, which converts the force of the driver's pedal into the force that pushes the piston of the brake master cylinder. The stroke adjustment of the brake pedal is an important part of the adjustment of the braking system.

There are three main evaluation indicators of brake pedal travel: free stroke of brake pedal, pedal stroke of conventional braking and pedal stroke of emergency braking. If the brake pedal travel is too long, the driver will obviously feel that the braking performance is poor, and there is no confidence in the braking ability of the whole vehicle, and at the same time, it will increase the driver's fatigue and do not meet the ergonomic design requirements; The brake pedal travel is too short, the whole vehicle brakes roughly, and the passengers' forward leaning feeling is serious when braking, and the comfort is reduced.

The function of the brake master cylinder is to generate high-pressure oil and pass it to each wheel cylinder through the oil pipe, so that the wheel cylinder opens and pushes the brake shoes to generate braking force.

Vacuum booster Vacuum booster is the core component of the vacuum assist servo braking system, which uses the pressure difference between the vacuum and the atmosphere of the engine intake pipe to help.

Brake fluidBrake fluid is a liquid medium that transmits brake pressure in the hydraulic braking system, and there are synthetic and mineral oil types, which are divided into four levels: DOT3, DOT4, DOT5 and DISPERSION. DOT3 and DOT4 mineral oil brake fluids are commonly used in cars.

The function of the brake oil pipe is to transfer the brake fluid in the braking system.

Brake wheel cylinder (brake cylinder) Brake cylinder is an indispensable part of the braking system, its main role is to push the brake pads, and the brake pads rub the brake drum to reduce the speed and stationary.

After the brake is pressed, the master cylinder generates a thrust to press the hydraulic oil to the cylinder, and the piston inside the cylinder begins to move under hydraulic pressure to push the brake pads.

The braking system is generally composed of two main parts: the brake control mechanism and the brake. The braking control mechanism produces the braking action, controls the braking effect, and transmits the braking energy to the various parts of the braking system of the brake, and the brake generates the part that beats the force that hinders the movement or movement trend of the vehicle.

1.The brake pedal of the car is under the steering wheel, and when the brake pedal is pressed, the brake lever is pressurized and transmitted to the brake pad on the brake drum to jam the brake wheel, so that the car slows down or stops running. The manual brake of the car is next to the gear shift and is connected to the brake bar.

Bicycle brakes are also common, which are decelerated by rod brakes fixed to the frame or disc brakes.

2.The brakes are accomplished by the intense friction between the brake pads and the brake drums.

3.The principle of braking is to convert the kinetic energy of the car into heat energy and consume it, and the kinetic energy comes from the power provided by the engine, which needs to be provided by the work of fuel combustion, which means that if you step on the brakes once, it means that your gasoline will be wasted. So, please remember the first point:

When driving, apply the brakes as little as possible, and braking is only for comfort or in an emergency.

4.Many brakes are emergency brakes as a last resort, so you must pay attention to the braking skills. There are two situations discussed here, one is the vehicle without the ABS anti-lock braking system, and the old vehicles are basically like this.

This kind of vehicle in the encounter with emergency Ji Wei Kai brakes, if the braking force is too large, it may make the car tires lock (the tires do not rotate at all), we can often see two long black brake marks on the road, this is the trace of friction between the tire and the ground when the car brakes without ABS, the tire will no longer rotate after the tire is locked due to emergency braking, but the huge inertia will make the tire of the car rub against the ground and continue to slide forward, The violent friction between the tire and the ground caused a black mark on the rubber particles that had been rubbed off on the tire. At this time, if you force the direction, it will often have serious consequences such as deviation, side slippage, tail flicking, or even rollover out of control.

A simple hydraulic braking system is shown in 1-1 figure, it is made up of brake pedal 1, master cylinder push rod 2, master cylinder piston 3, brake master cylinder 4, brake oil pipe 5, return spring 6, brake wheel cylinder 7, wheel cylinder piston 8, brake drum 9, brake shoe 10, brake shoe pad 11, brake bottom plate 12, support pin 13.

The metal brake drum is mounted on the wheel (the hub is not shown in the picture), which is connected to the wheel, with its inner circle as the working surface, and rotates with the wheel. The brake floor is generally installed on the axle with a shed and does not rotate, and two supporting pins 13 for supporting the brake shoe are installed on the brake floor.

The outer circular surface of the brake shoe has brake shoe (friction) pad 11. Brake wheel cylinder 7 is fixedly installed on brake bottom plate, communicates with brake master cylinder by oil pipe 5, and wheel cylinder piston 8 in master cylinder can move in cylinder under the control of driver. When not braking, there is a certain gap between the inner circular working surface of the brake drum and the brake shoe, and the wheel and brake drum can rotate freely.

When braking (braking) is required, the driver steps on the brake pedal 1, and the push rod pushes the chain and the master cylinder piston 3 to move to the right, and the brake fluid in the master cylinder flows to the wheel cylinder. Two wheel cylinder pistons 8 in the wheel cylinder promote two brake shoes to rotate around the bearing pin 13, and the brake shoe friction plate is pressed on the inner circle working surface of the brake drum.

The non-rotating brake shoe creates a frictional moment on the rotating brake drum in the opposite direction to the direction of rotation of the wheel. The brake drum transmits this torque to the wheel, because there is an adhesion between the wheel and the road surface, the wheel acts on the road surface a forward peripheral force dagger, and the road surface also acts on the wheel at the same time a backward reaction force, that is, the braking force FB, the braking force is transmitted to the car (bridge) frame and the body by the wheel, so that the whole car produces a certain deceleration, and the greater the braking force, the greater the deceleration.

The kinetic energy of the car is converted into heat energy generated by friction between the brake shoe and the brake drum (and between the tread and the ground) and is dissipated into the atmosphere. When let go of the brake pedal, the brake fluid in the brake wheel cylinder is refluxed under the effect of brake shoe return spring 6 tension and compression, and the wheel cylinder piston and the brake shoe return accordingly, and the friction torque and braking force FB disappear, and the braking effect stops.

From the above discussion, it can be imagined that the amount of braking force FB that hinders the movement of the car depends not only on the frictional moment, but also on the adhesion conditions between the tire and the road surface. If, as mentioned above, the car is driving on the ice and snow road, the adhesion is very small, and the car at this time is not able to produce a large braking effect. Of course, when discussing the structure of a car's braking system in the future, it is assumed that there is good adhesion between the tire and the ground.