Front axle swing type paddy field four-wheel drive chassis steering system

Abstract

The invention discloses a front axle swinging type four-wheel drive chassis steering system for paddy fields. The front axle swinging type four-wheel drive chassis steering system comprises a front axle, a rear axle, a left front wheel, a right front wheel, a left rear wheel and a right rear wheel. The left front wheel and the right front wheel are arranged at the left end and the right end of the front axle, the left rear wheel and the right rear wheel are arranged at the left end and the right end of the rear axle, and the front axle and the rear axle are fixed onto a vehicle frame; the left front wheel, the right front wheel, the left rear wheel and the right rear wheel are respectively provided with independent hydraulic motors including a left front hydraulic motor, a right front hydraulic motor, a left rear hydraulic motor and a right rear hydraulic motor, and the various hydraulic motors are connected with a hydraulic circuit; the left front hydraulic motor and the right front hydraulic motor are serially connected with each other and form a front hydraulic motor group to be connected into the hydraulic circuit, and the left rear hydraulic motor and the right rear hydraulic motor are respectively connected with the front hydraulic motor group in parallel and then are connected into the hydraulic circuit. The front axle swinging type four-wheel drive chassis steering system has the advantages that the front axle swinging type four-wheel drive chassis steering system is simple in structure, good in traction attachment capacity, operability and chassis stability, flexible in operation and high in cost performance, a chassis can be turned around paddy field edges or corners with small turning radiuses, and the like.

Description

technical field [0001] The invention relates to the technical field of agricultural machinery used in paddy fields, in particular to a front axle swing type paddy field four-wheel drive chassis steering system. Background technique [0002] According to relevant data released by the Ministry of Land and Resources in 2012, my country's rice planting area is about 452 million mu, with 150 million households growing rice, with an average of about 3 mu per household. Because paddy fields have relatively high requirements for land leveling, the difficulty of leveling will increase when the area of ​​the field increases, so the area of ​​paddy field cultivation in my country is small. Due to the influence of terrain in mountainous hills, most of the field areas are less than 2 mu, and there are even many small fields under 1 mu. In contiguous flat paddy fields, the planned length is generally 100-120 meters, and the width is 50-60 meters, and the maximum rarely exceeds 200 meters...

AI Technical Summary

Problems solved by technology

[0003] At present, the chassis used for rice planting and inserting machinery is mainly imported from Japan. During the planting and inserting operation, the steering is mainly carried out by deflecting the front wheels, and a power assist device is needed to assist the steering. Because most of the turning radiuses are small It is between 3.5 and 4 meters, and it needs a headland width of more than 4 meters to realize turning. The empty time is increased during operation, and it is impossible to directly turn around and transfer to the next operation, which affects the efficiency of sowing and inserting operations.

Therefore, the rice planting and inserting machinery in this structural form is not suitable for the irregular and small paddy field structure in my country at the present stage.

When four-wheel tractors perform mechanical operations in paddy fields and wetlands, due to the high moisture content of the soil, the wheeled tractors have the following defects: they may not be able to enter the paddy fields, or form deep wheel ruts during operation, and problems such as slipping and subsidence often occur, especially In the process of steering, the tractor mainly turns with the deflection of the front wheels. On the one hand, the wheels sag seriously, and the steering is laborious. It is necessary to increase the assistance of hydraulic or electronically controlled power steering to realize the turning; on the other hand, the turning radius of the deflection Large headland width is required, and multiple gear shifts are required when turning at the headland, which makes it difficult for the tractor to fully exert its effectiveness, and it is also easy to damage the physical structure of the soil, so the deflected four-wheel tractor is not suitable for steering in paddy fields

[0004] In hilly and mountainous areas, walk-behind rice transplanters are mainly used at present. Walk-behind rice transplanters are widely used in hilly areas due to their small turning radius and flexible operation, but their mechanization is low and labor intensity is high.

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