Pneumatic braking system and working vehicle

Abstract

The invention relates to a pneumatic braking system and a working vehicle. The pneumatic braking system comprises an ABS (Anti-lock Braking System) solenoid valve (5), a first foot relay valve (6) and braking gas chambers which are arranged at the two ends of a vehicle axle of the working vehicle and are used for carrying out braking action on wheels, and is characterized in that the braking gas chambers are communicated with a system working gas path through the first foot relay valve (6); and an output port of the ABS solenoid valve (5) is communicated with a control chamber of the first foot relay valve (6). The braking gas chambers are communicated with the system working gas path through the first foot relay valve and the ABS solenoid valve is not used as a direct gas supply source of the braking gas chambers anymore, so that the amount of gas flow flowing through the ABS solenoid valve is greatly reduced when the ABS solenoid valve performs the actions, and furthermore, the burden of the ABS solenoid valve is alleviated and the system response frequency of the ABS solenoid valve is improved; and on the other hand, decompression time can be shortened when the braking gas chambers are used for braking and decompressing and high-pressure gas in the braking gas chambers can be rapidly discharged when the braking is relieved.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to an air brake system and an operating vehicle. Background technique [0002] For multi-axle all-terrain cranes, the air brake system of its chassis mainly uses the brake air chamber to convert the pressure of compressed air into mechanical thrust to achieve vehicle braking. The brake air chamber mainly uses the Anti-lock Braking System (ABS) solenoid valve to directly supply air to it. This air supply method needs to connect the air outlet of the foot relay valve to the ABS solenoid valve. Then, the air outlet of the ABS electromagnetic valve directly or partially directly supplies air to part of the brake air chamber. [0003] After research by the inventor, this existing air braking system has the following disadvantages: [0004] 1. Since the compressed air needs to pass through the ABS solenoid valve when it flows to the brake air chamber or flows out from the brake air ...

AI Technical Summary

Problems solved by technology

[0004] 1. Since the compressed air needs to pass through the ABS solenoid valve when it flows to the brake air chamber or flows out from the brake air chamber, this results in low efficiency of charging and deflation of the brake air chamber, which in turn prolongs the response time of the brake. Causes the problem of too long braking distance

[0005] 2. Every time the ABS moves, the air flow flowing through the ABS valve body is more, which causes the burden of the ABS solenoid valve to be too heavy, which in turn affects the system response frequency of the ABS solenoid valve

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