Engineering vehicle chassis brake control system and crane

Abstract

The invention discloses an engineering vehicle chassis brake control system and a crane, and relates to the technical field of engineering vehicles. The technical problem that braking capacity in the prior art is poor is solved. The engineering vehicle chassis brake control system comprises a foot brake valve, a first foot relay valve, a three-shaft left brake chamber, a three-shaft right brake chamber and a first air tank, and an air inlet of the first foot relay valve is communicated with an air outlet of the first air tank. One of two air outlets of the first foot relay valve is communicated with a travelling brake airflow inlet of the three-shaft left brake chamber. The other of the two air outlets of the first foot relay valve is communicated with a travelling brake airflow inlet of the three-shaft right brake chamber. The crane comprises a rear axle brake air path, and the rear axle brake air path comprises the engineering vehicle chassis brake control system. The engineering vehicle chassis brake control system and the crane are used for improving the brake performance of the chassis brake control system of the crane.

Description

technical field [0001] The invention relates to the technical field of engineering vehicles, in particular to an engineering vehicle chassis braking control system and a crane equipped with the engineering vehicle chassis braking control system, especially an all-terrain crane equipped with the engineering vehicle chassis braking control system. Background technique [0002] At present, the main methods used in the braking system are mainly divided into mechanical braking, hydraulic braking and pneumatic braking according to the transmission mode of braking energy. [0003] 1) Mechanical brake: It is adopted because of its large braking torque, high reliability and good effect, but this kind of braking structure is complex, and its manipulation sensitivity and quick response are poor. [0004] 2) Hydraulic brake: It has the characteristics of light and labor-saving operation, quick response, simple structure, and small mass. However, the hydraulic brake torque is unstable an...

AI Technical Summary

Problems solved by technology

[0018] In the brake control circuit, port 21 of the foot brake valve 51 is connected to the front part of the axle brake air circuit of the whole machine, and port 22 is connected to the rear part of the axle brake air circuit. The pressure of the chamber air outlet (port 22) is generally 0.2 to 0.3 bar. When braking, the front axle brakes before the rear axle brake. The inertial force causes the vehicle to lean forward, and the braking stability of the vehicle is poor.

[0019] In summary, for all-terrain cranes, the following methods are used: figure 1 In the existing braking control method shown, all the air chambers of the two bridges are supplied with air from the air outlet 22 of the foot relay valve 53 during the service braking, resulting in insufficient air supply during braking and weakened braking ability

And the two parking brake control axles share a manual relay valve 540, so the emergency braking capability is relatively weak

In the service braking, the front part of the axle is braked before the rear part of the axle is braked, and the braking stability of the whole machine is poor

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