Hydraulic differential steering device

Abstract

A hydraulic differential steering device comprises a box body, a left proportional steering mechanism, a right proportional steering mechanism, a sun gear shaft, a speed reducing mechanism and a hydrostatic stepless speed changing mechanism, wherein the left proportional steering mechanism is arranged at one end of the sun gear shaft, the right proportional steering mechanism is arranged at the other end of the sun gear shaft, and the sun gear shaft is arranged on the box body; driving power is input into the left proportional steering mechanism and the right proportional steering mechanism at the same speed, which are separately connected with the hydrostatic stepless speed changing mechanism through the speed reducing mechanism; and the hydrostatic stepless speed changing mechanism has a function of locking gear rings of the left proportional steering mechanism and the right proportional steering mechanism and inputting opposite steering power to the gear rings at the same speed, enabling caterpillar track equipment to have a steering property that a certain proportional relationship is formed between steering angular speed and the speed regulating range of the hydrostatic stepless speed changing mechanism. Therefore, the steering accuracy and the operation stability of the caterpillar track equipment are improved, and the steering controllability is great. The hydraulic differential steering device is particularly suitable for being applied in the field of caterpillar track type agricultural mechanical equipment.

Description

technical field [0001] The invention relates to the technical field of crawler equipment power transmission, in particular to a hydraulically controlled differential steering device. Background technique [0002] Tracked equipment mainly includes crawler-type engineering machinery, crawler-type military machinery and crawler-type agricultural machinery; among them, crawler-type engineering machinery and crawler-type military machinery are usually complex in structure and expensive, because these crawler products mainly use hydraulic pressure The motor directly drives the track, but the transmission system is relatively simple, with almost no transmission, drive axle and other equipment; in recent years, agricultural machinery technology has developed rapidly, and a large number of tracked agricultural machinery and In agricultural machinery equipment, a power transmission scheme without a differential is usually adopted, and a power separation or shunt device is installed in...

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Problems solved by technology

[0002] Tracked equipment mainly includes crawler-type engineering machinery, crawler-type military machinery and crawler-type agricultural machinery; among them, crawler-type engineering machinery and crawler-type military machinery are usually complex in structure and expensive, because these crawler products mainly use hydraulic pressure The motor directly drives the track, but the transmission system is relatively simple, with almost no transmission, drive axle and other equipment; in recent years, agricultural machinery technology has developed rapidly, and a large number of tracked agricultural machinery and In agricultural machinery equipment, a power transmission scheme without a differential is usually adopted, and a power separation or shunt device is installed inside the crawler transmission to make a speed difference between the left and right sides of the power and then realize the steering. These devices are mainly jaw clutch steering devices, planetary Gear steering device and hydraulic control differential steering device, etc., but these transmissions have low steering precision, poor accuracy, and poor steering controllability when driving tracked vehicles to turn

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