Nine-shaft automobile chassis crane and steering control system thereof

Abstract

The invention discloses a steering control system of a nine-shaft automobile chassis crane. The steering control system comprises a pull rod type steering transmission mechanism and a hydraulic power-assisted steering system, wherein the pull rod type steering transmission mechanism is used for controlling corresponding wheels on a first steering shaft, a second steering shaft, a third steering shaft, a fourth steering shaft and a fifth steering shaft to steer; the pull rod type steering transmission mechanism comprises a first rocker arm, a second rocker arm and a third rocker arm which are respectively used for controlling the wheels on the corresponding steering shafts to steer through a pull rod assembly; and the pull rod type steering transmission mechanism also comprises a first auxiliary rocker arm and an auxiliary pull rod assembly, the first auxiliary rock arm is arranged between any two adjacent rocker arms in the three rocker arms, and the auxiliary pull rod assembly is used for sequentially hinging the three rocker arms and the first auxiliary rocker arm. By using the steering control system, the condition that parts of the pull rod assembly are overlong is avoided, and the phenomenon that parts of the pull rod assembly is instable and bent can be effectively prevented; and furthermore, the safety performance in operating vehicles is improved on the basis of avoiding the abnormal wearing of a tire. On the basis, the invention also provides a nine-shaft automobile chassis crane with the steering control system.

Description

technical field [0001] The invention relates to an automobile control system, in particular to a nine-axle automobile chassis crane and a steering control system thereof. Background technique [0002] Super-large tonnage truck chassis cranes have a long body and a large load capacity, so they generally use multi-axle chassis. For example, Liebherr's 1,200-ton crane LTM11200 and Demag's 1,200-ton crane AC1000 all use nine-axle chassis. As the name implies, the chassis of a nine-axle car has nine steering shafts. Hereinafter, the nine steering shafts are defined as the first steering shaft L1, the second steering shaft L2, the third steering shaft L3, and the fourth steering shaft from the front to the rear of the car. L4, fifth steering shaft L5, sixth steering shaft L6, seventh steering shaft L7, eighth steering shaft L8, and ninth steering shaft L9. The chassis multi-axle (axle) steering technology is the key technology to improve the handling stability, curve passing abil...

AI Technical Summary

Problems solved by technology

[0005] According to the above structure, if one of the wheels on the first to fifth steering shafts is stuck by an obstacle, the system pressure of the hydraulic power steering system will rise to the maximum design pressure value of the system in an extreme period of time. The reaction of the power steering cylinder will cause a sudden increase in the force of each tie rod assembly in the tie rod steering transmission mechanism; especially for the sixth tie rod assembly 110, due to its long shaft, it is prone to instability and bending

If things go on like this, it will cause abnormal wear of the vehicle tires and shorten the service life of the tires; in addition, if the rod body of the tie rod assembly is originally curved, it will aggravate its bending degree, thereby weakening the rigidity of the steering system

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