Multi-axle steering system for multi-axle vehicles and multi-axle vehicles

Abstract

The invention discloses a multi-axle steering system for a multi-axle vehicle. Each vehicle wheel is provided with an electric control hydraulic steering device to control the rotation direction of the vehicle wheel; the electric control hydraulic steering device comprises a motor, a reversing valve and a steering hydraulic cylinder, an electronic control unit drives a valve element of the reversing valve to move between a first position and a second position through the motor, and a piston of the steering hydraulic cylinder is connected with the valve element. The motor drives the valve element of the reversing valve to switch the positions to enable oil to enter into a rod cavity or a non-rod cavity of the steering hydraulic cylinder to control the piston of the steering hydraulic cylinder to move, and then the valve element of the reversing valve is reversely driven to move to seal an oil hole of the reversing valve; a main oil pump is made to stop supplying the oil, and therefore the piston of the steering hydraulic cylinder stops moving. The electric control hydraulic steering device itself has a closed-loop control function, therefore, the multi-axle steering system just needs to be set as a simple open-loop control system, the structure is simple, and the accurate steering control over the multi-axle vehicle can be achieved.

Description

technical field [0001] The present invention relates to engineering machinery, in particular to a multi-axle steering system for a multi-axle vehicle and the multi-axle vehicle. Background technique [0002] With the needs of engineering construction and production construction, large heavy-duty vehicles with high power and large carrying capacity have been widely used. However, due to the limitation of road surface conditions and policies and regulations, it can no longer meet the requirements of use only by increasing the bearing capacity of the axle and reducing the weight of the vehicle. At the same time, in order to enhance the mobility, steering flexibility, handling stability and versatility of vehicles, multi-axis steering technology is increasingly favored by large heavy-duty vehicle manufacturers. [0003] When multi-axle heavy-duty vehicles are turning, in order to reduce the sliding wear of the tires and reduce the running resistance, all the wheels involved in ...

AI Technical Summary

Problems solved by technology

However, due to the large number of wheels to be controlled and the complexity of the closed-loop control algorithm, it is difficult to implement

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