Two-speed hydraulic drive axle assembly for large grain combine harvester

Abstract

The invention relates to a two-speed hydraulic driving axle assembly for a large grain combine harvester, including a hydrostatic system driven by an engine, a mechanical transmission system, a hydraulic braking system, a driving axle control and manipulation system and the like. The hydraulic variable pump is equipped with a variable controller, and the variable control of the hydraulic variable pump is realized through the movement of the variable swing arm of the variable pump; the mechanical transmission system is equipped with a shift control manipulator, including the shift control The gear control handle manipulates the gear shift engagement sleeve to realize the shift of the gear position. The transition gear and the harvesting gear are selected through the gear shifting sleeve of the mechanical transmission system. The harvester equipped with this hydraulic drive axle assembly can therefore realize forward, backward, steering and stepless speed change, and can complete various operations. A walking job. The shifting operation of the driving axle is simple, and the gear failure rate of the gearbox is low.

Description

Technical field [0001] The patent of the invention relates to the technical field of two-speed hydraulic drive axle assembly for a large grain combine harvester and the technical field of hydrostatic pressure. Background technique [0002] In recent years, the annual output and market demand of large-scale self-propelled grain combine harvesters have doubled. This type of large self-propelled grain combine harvester has been matched with the traditional 1000 series mechanical continuously variable drive axle assembly, and its transmission principle is as follows figure 1 Shown. [0003] The mechanical drive axle assembly realizes four forward gears and one reverse gear shift through the movement of the sliding gear and the meshing sleeve. This drive axle gear shift operation is complicated, the driver's long-term driving energy consumption is high, and the gearbox gear is easy to be damaged early. In order to solve these problems, some people try to cancel the stepless torque inc...

AI Technical Summary

Problems solved by technology

The gear shifting operation of the drive axle is complex, the driver consumes a lot of physical energy after driving for a long time, and the gearbox gear is easy to be damaged early

In order to solve these problems, some people try to cancel the infinitely increasing torque assembly and clutch on the gearbox of the 1000 series drive axle assembly, directly install a hydrostatic system such as a hydraulic pump and a hydraulic motor, and turn it into a forward 4th or 3rd gear hydraulic system. The drive axle assembly, however, did not solve the key technical problems of drive axle performance such as complicated shifting operations, unsafe braking, and unreasonable speed matching.

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