Closed hydrostatic four-wheel driving system of self-propelled harvester

Abstract

The invention relates to the field of self-propelled harvesters and particularly to a closed hydrostatic four-wheel driving system of a self-propelled harvester. The closed hydrostatic four-wheel driving system of the self-propelled harvester is characterized in that: a running half-hour four-wheel driven gearbox is located at the front lower part of a rack; the running half-hour four-wheel driven gearbox is respectively connected with a front drive shaft, a running variable displacement motor, a middle drive shaft, a four-wheel-driven electromagnetic valve and a gear shifting electromagnetic valve; and the running variable displacement motor is connected with a valve block. The running half-hour four-wheel driven gearbox internally comprises a box body, a first shaft, a second shaft, a middle shaft and a third shaft; and the box body is internally provided with a working gear and a running gear. A hydraulic control loop of the running half-hour four-wheel driven gearbox comprises a gear pump, the running variable displacement motor, the valve block, the running variable pump and a steering device. Compared with the prior art, the closed hydrostatic four-wheel driving system of the self-propelled harvester, disclosed by the invention, has the advantages that: (1) the application to the self-propelled harvester is the origination in the self-propelled harvester industry in China; (2) the whole running system structure is simplified extremely; and (3) the linear velocity of the front driving wheels and the rear driving wheels are same, and the service life of parts is prolonged.

Description

technical field [0001] The invention relates to the field of self-propelled harvesters, in particular to a closed hydrostatic four-wheel drive system of the self-propelled harvester. Background technique [0002] Corn, wheat, soybeans and other food crops have a long history of planting in my country, and the planting area in my country is vast and widely distributed. At present, two-wheel drive harvesting equipment is widely used in our country. The disadvantage is that it is affected by the climate and cannot enter the field with high humidity to work. When encountering low-lying and muddy conditions, the wheels will slip and break down, which will reduce the passing capacity of the harvester. been particularly affected. [0003] Due to the excellent off-road performance of the four-wheel drive system, some users have modified the steering axle or the main transmission box on the basis of the original equipment to realize the so-called four-wheel drive, such as connecting...

AI Technical Summary

Problems solved by technology

[0005] 1) A set of walking control system is added on the basis of the original walking drive, resulting in complexity in structure, operation, maintenance, etc.

[0006] 2) Because the transmission ratio of the front drive axle and the rear drive axle is difficult to be consistent, it is easy to cause early damage to other components such as the gearbox and transmission box, and at the same time bring hidden dangers to operational safety

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