Hill and mountain tractor four-wheel steering system and steering control method
A four-wheel steering and steering control technology, which is applied to the steering mechanism, steering mechanism, fluid steering mechanism, etc. of deflectable wheels, can solve the problems of large turning radius, damage to crops, and inflexible manipulation, and achieves reduction of steering radius, damage reduction effect
Active Publication Date: 2017-06-27
JILIN UNIV +1
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Problems solved by technology
[0004]At present, most of the existing tractors in my country use front wheel steering technology, but when turning in places with complex terrain and narrow space, they will encounter large turning radius , inflexible handling and other issues, it will damage a large number of crops when turning in field operations, and ordinary tractors are not suitable for operating in this working condition
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[0047] In order to further illustrate the technical solution of the present invention, in conjunction with the accompanying drawings, the specific implementation of the present invention is as follows:
[0048] The invention provides a four-wheel steering system for tractors in hilly and mountainous areas. The steering system can realize three steering modes: front wheel steering, rear wheel steering, and four-wheel out-of-phase steering. When switching between steering modes, the steering system must return to the initial position, and the steering cylinder must return to the neutral position before switching (that is, return to the initial non-steering mode).
[0049] like figure 1 As shown, the hilly mountain tractor four-wheel steering system provided by the present invention is made up of four-wheel steering mechanism and four-wheel steering hydraulic system. Wherein, the four-wheel steering mechanism includes a front-wheel steering mechanism and a rear-wheel steering me...
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The invention discloses a hill and mountain tractor four-wheel steering system and a steering control method. The hill and mountain tractor four-wheel steering system is composed of a four-wheel steering mechanism and a four-wheel steering hydraulic system. In a front-wheel steering mechanism body, the ends of piston rods of a front steering oil cylinder, front steering ball heads and one ends of front connecting rods are fixedly connected in sequence, and the other ends of the front connecting rods are hinged to front steering pulling rod ball heads which are connected with front steering knuckle arms. Cylinder bodies of front leveling oil cylinders are sleeved with the front steering knuckle arms and connected with a front drive axle. The other ends of the front steering knuckle arms are connected with front steering stand columns. The lower ends of the front steering stand columns are fixed to front steering knuckles which are connected with front wheels through front planetary wheel edges. The four-wheel hydraulic system is connected to steering oil cylinders controlling the four-wheel steering mechanism. The control method comprises front-wheel steering, rear-wheel steering and four-wheel out-of-phase steering. According to the hill and mountain tractor four-wheel steering system and the steering control method, a four-wheel steering technology is applied to a tractor, so that the tractor is more flexible in steering when operating in a hill and mountain area and more stable in performance.
Description
technical field [0001] The invention belongs to the technical field of agricultural machinery, and in particular relates to a four-wheel steering system and a steering control method for tractors in hilly and mountainous areas. Background technique [0002] my country is a large agricultural country, and most of the arable land is distributed in hilly and mountainous areas. The terrain of hilly and mountainous areas is complex, and ordinary agricultural machinery is difficult to cultivate. Mountain tractors are the main tool for farming in hilly and mountainous areas in my country. Therefore, the development of tractors in hilly and mountainous areas is very important to the improvement of my country's agricultural economy. [0003] Hilly and mountain tractors mainly include transmission system, driving system, steering system and braking system, etc., among which the function of the steering system is to control the driving direction of the vehicle. Hilly and mountainous t...
Claims
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IPC IPC(8): B62D5/18B62D9/00
CPCB62D5/061B62D5/18B62D9/00
Inventor 马文星冯雪林忠卢秀泉向惠芳才委
Owner JILIN UNIV