Pressure automatic switch combined brake valve

Abstract

The invention discloses a combined brake valve with an automatic pressure switch. The combined brake valve comprises a valve body, a brake piston, an air valve and the automatic pressure switch, the air valve is used for controlling the communication state of a brake air channel, the brake piston can vertically move in a valve cavity of the valve body and is used for providing starting power for the air valve, a driving chamber for providing driving air pressure is formed above the brake piston, a buffer chamber is formed below the brake piston, and the automatic pressure switch is connected with the buffer chamber. When inputted air pressure is low, inputted compressed air is conveyed into the buffer chamber by the automatic pressure switch to counteract part of lower push force for driving the indoor driving air pressure for the brake piston. When the inputted air pressure is high, the air in the buffer chamber is discharged by the automatic pressure switch. The brake air pressure and releasing speed can be adjusted as needed by the added automatic pressure switch, tires cannot be locked when no-load brake is performed, rapidness and effectiveness are ensured when load brake is performed, running safety of vehicles is greatly improved, and braking damage to the tires is reduced.

Description

technical field [0001] The invention relates to the technical field of vehicle braking, in particular to a brake valve applied in a heavy vehicle braking system. Background technique [0002] The brake system is the most important part to ensure the safe driving of the vehicle. However, the air brake system used by existing trucks, especially large trucks, has many disadvantages. Large, the braking force provided by ordinary brake valves is difficult to meet the braking requirements. Usually, it is necessary to replace the brake valve with a large braking force to achieve the braking effect of heavy vehicles. However, this kind of braking system with large displacement is used when the vehicle is unloaded. When braking, the tires will be locked as soon as you step on the pedal lightly, and the tires will be quickly scrapped due to dragging. At the same time, the wheels will be damaged to a certain extent, which will increase the considerable maintenance cost. Moreover, when...

AI Technical Summary

Problems solved by technology

[0002] The brake system is the most important part to ensure the safe driving of the vehicle. However, the air brake system used by existing trucks, especially large trucks, has many disadvantages. Large, the braking force provided by ordinary brake valves is difficult to meet the braking requirements. Usually, it is necessary to replace the brake valve with a large braking force to achieve the braking effect of heavy vehicles. However, this kind of braking system with large displacement is used when the vehicle is unloaded. When braking, the tires will be locked when the pedal is lightly stepped on, and the tires will be quickly scrapped due to dragging. At the same time, it will also cause certain damage to the wheel hub, which will increase the maintenance cost considerably.

Moreover, when driving on wet and slippery roads in rainy and snowy weather, it is prone to brake deflection and tail flicking, which may cause safety accidents.

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