Differential steering device of crawler belt travelling mechanism

Abstract

A differential steering device of a crawler belt travelling mechanism comprises a transmission differential box with a left output shaft and a right output shaft, a differential mechanism and a differential lock are arranged in the box, the differential mechanism distributes power from the input shaft to the left output shaft and the right output shaft, the left output shaft and the right output shaft are coupled and synchronously rotate by the differential lock, and the differential lock is provided with control handles outside the box; reset springs are connected with the control handles so as to enable the differential lock to stay in the coupling and locking state usually, the left output shaft and the right output shaft are provided with a friction type brake respectively, the left and the right friction type brakes are provided with brake handles outside the box, a left operating lever and a right operating lever both with hinge points are connected with the control handles via unidirectional push rods and are connected with the left and the right brake handles via pull rods, the control handles can be pushed to rotate by rotating the operating levers to enable the differential mechanism to drop out of the coupling and locking state and the brake handles are pulled to brake the output shafts on the corresponding sides. The transmission differential box widely applied to wheeled vehicles can also be used for the crawler belt travelling mechanism, and plays an important role promoting quick development of crawler belt type agricultural machinery equipment.

Description

technical field [0001] The present invention relates to a crawler track traveling mechanism, in particular to a differential steering device of the crawler track traveling mechanism. Background technique [0002] Vehicles using crawler running mechanisms in the known technology, such as crawler tractors, do not have a front steering wheel mechanism for wheeled vehicles, and can only implement vehicle steering through differential operation of the crawlers on both sides. The common methods to realize the differential operation of the tracks on both sides are as follows: 1. The differential speed is realized by the unilateral disengagement method. Through the shifting fork or the clutch device, one of the crawler tracks loses power driving, the other crawler track runs normally, and the crawler tracks on both sides operate at differential speed to realize steering, such as a crawler gearbox transmission disclosed in the patent document with publication number CN 203120416U Th...

AI Technical Summary

Problems solved by technology

Through the fork or clutch device, one side of the crawler loses power drive, the other side of the crawler runs normally, and the crawler on both sides runs at a differential speed to realize steering, such as a crawler gearbox transmission disclosed in the patent document with the publication number CN 203120416U The steering device is to move the dual gear (11) through the shift fork (4) in the gearbox to disengage it from the central gear (3), so that the single-side track loses the active force to achieve differential steering. The disadvantage is that it is not possible to turn at medium and high speeds, and it is only suitable for low-speed steering, which seriously affects the overall operating efficiency of the vehicle, and the steering is stiff and inflexible. When the direction is corrected, there is a strong sense of frustration and unevenness

2. Through the machine-hydraulic-machine conversion, the crawlers on both sides are operated at different speeds to realize steering. For example, the patent document with the publication number CN203567804U discloses a steering wheel-type crawler car electro-hydraulic steering mechanism. The displacement of the pump is controlled by the controller. The change makes the left and right driving motors run at a differential speed to realize track steering. The problem with this type of technical solution is that when running at low speed, the conversion efficiency of machine-hydraulic-machine is low, it is difficult to achieve high power output, and the cost of production and maintenance is high. Its application field and scope are relatively limited

Therefore, without setting the front steering wheel, such as the crawler running gear, it is impossible to simply transfer the transmission differential device suitable for wheeled vehicles to the crawler running gear, otherwise the vehicle will often show irregular Steering wobbles, doesn't work

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