Synchronous steering hydraulic system for hilly and mountainous-area tractor and steering control method

Abstract

The invention provides a synchronous steering hydraulic system for a hilly and mountainous-area tractor and a steering control method. The synchronous steering hydraulic system for the hilly and mountainous-area tractor comprises an oil supply component, a full-hydraulic steering device, a first two-position three-way manual reversing valve, a front steering hydraulic cylinder, a two-position four-way solenoid reversing valve, a rear steering hydraulic cylinder, a gear distributor, a two-position three-way solenoid reversing valve and a second two-position three-way manual reversing valve, wherein the gear distributor can distribute flows needed by the front hydraulic cylinder and the rear hydraulic cylinder in proportion according to differences of steering angles of each front wheel and a corresponding rear wheel, and therefore steering synchronization and returning synchronization of the front wheels and the rear wheels can be achieved. By means of the control method for the synchronous steering hydraulic system for the hilly and mountainous-area tractor, front wheel steering control, rear wheel steering control and four-wheel steering control can be achieved. Compared with the prior art, according to the synchronous steering hydraulic system for the hilly and mountainous-area tractor and the steering control method, on the condition that the requirements on the steering angles of the front wheels and the rear wheels of the tractor are different, steering synchronization and returning synchronization of the front wheels and the rear wheels can be achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural machinery hydraulic systems, is suitable for hilly and mountainous tractors, and in particular relates to a steering synchronous hydraulic system and a steering control method for hilly and mountainous tractors. Background technique [0002] In recent years, due to the rapid development of my country's economy, the development of agriculture has become more and more important. The use of a series of agricultural machinery such as tractors has been comprehensive, especially in areas with particularly complex terrain such as mountains and hills. The performance requirements are higher, so it is very important to develop a high-performance small tractor suitable for farming in my country's hilly and mountainous areas to promote the development of my country's agricultural intelligence. [0003] The steering system is a very important part of the vehicle. The steering system can change and restore...

AI Technical Summary

Problems solved by technology

[0006] Although the technology of the above-mentioned patent can enhance the flexibility of steering, it can only realize that when the vehicle is turning, the front and rear wheels synchronously generate steering angles of equal size and opposite directions, which does not solve a key problem: when the front and rear wheels have the same track , when the steering angle requirements of the front and rear wheels are different, and the strokes of the front and rear hydraulic cylinders are different, the existing full hydraulic steering system cannot realize steering synchronization and back-to-center synchronization

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