Tobacco harvesting machine adopting closed type hydraulic drive system

Abstract

The invention discloses a tobacco harvesting machine adopting a closed type hydraulic drive system. The tobacco harvesting machine comprises an oil tank and a hydraulic loop connected with the oil tank as well as a rear wheel hydraulic motor assembly I, a rear wheel hydraulic motor assembly II and a front wheel hydraulic motor assembly, wherein the hydraulic loop comprises a travelling hydraulic pump assembly; an oil supplementing loop and an oil return hoop, which are connected with the oil tank, are arranged in the travelling hydraulic pump assembly; the rear wheel hydraulic motor assembly I and the rear wheel hydraulic motor assembly II are connected with the travelling hydraulic pump assembly through an oil path; the oil path with a brake valve is arranged among the rear wheel hydraulic motor assembly I, the rear wheel hydraulic motor assembly II and the travelling hydraulic pump assembly; and the front wheel hydraulic motor assembly is connected with the travelling hydraulic pump assembly through the oil path. In a closed system, an oil inlet tube of a hydraulic pump is directly connected with an oil return tube of a performing element, so that a working liquid performs closed cycle in a pipeline of the system. The closed type system is relatively compact in structure, and is fewer in contact opportunity with air, so that air is not liable to permeate into the system, and therefore, transmission stability is good.

Description

technical field [0001] The invention relates to a tobacco harvester driven by a closed hydraulic system. Background technique [0002] my country began to develop tobacco harvesting machines in the 1990s. Due to various reasons, progress has been slow. At present, there has been no major breakthrough. Almost all tobacco leaf harvesting is still done manually, and labor costs account for the largest proportion in production costs. [0003] Generally speaking, the types of tobacco leaf harvesters in my country are improved after imitating foreign large-scale tobacco leaf harvesters. By transforming the power system of harvesting and driving, in order to adapt to the current situation of agricultural production in our country. [0004] Most foreign tobacco leaf harvesting machines are driven by hydraulic pressure. Because the relative quality and efficiency of foreign hydraulic components are relatively high, the transmission is stable, and the chance of oil leakage is relativ...

AI Technical Summary

Problems solved by technology

Although the cost of mechanical transmission is low, the transmission method is complicated, the stability at low speed is poor, and it is impossible to realize continuously variable speed.

The open hydraulic system solves the complex problem of the transmission mode of the mechanical transmission, but it cannot solve the problem of driving stability and continuously variable transmission well

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