Mobile agriculture machinery

Abstract

To improve working efficiency in a work not requiring a spin turning and improve traveling property in working in an ill-drained paddy field. This movable agricultural machine transfers driving force to a right and left traveling crawler 2 through a speed variable member 25 continuously varying a traveling speed by an operation of a traveling speed variable lever 73, operating an operation member 28 by an operating handle 19 and varies continuously in difference of the driving speed of the right and left traveling crawler 2. In the machine, a vehicle speed decided by an operating amount of the traveling speed variable lever 73 is lowered in proportional to an operating amount of the operating handle 19 and a speed lowering ratio of the vehicle speed to the operating amount of the operating handle 19 is freely variable.

Description

technical field [0001] The present invention relates to a mobile agricultural machine constituting, for example, a combine harvester, a cultivating tractor, or a field management vehicle for continuously harvesting and threshing straw in a field. technical background [0002] In the prior art, by operating the driving shift lever, the driving force is transmitted to the left and right running crawlers through a belt or a hydraulic continuously variable transmission mechanism that can freely change the driving speed steplessly, so that it can move at any speed, and, Use the steering wheel to operate the continuously variable transmission mechanism for steering, control the differential mechanism, and change the driving speed difference between the left and right crawlers steplessly to change the driving route. However, only by operating the steering wheel to turn, the speed of the vehicle can be kept roughly constant when going straight and turning. When doing a turn in place...

AI Technical Summary

Problems solved by technology

Therefore, although the vehicle speed is automatically reduced by synchronizing with the operation of the steering wheel, and it is automatically increased to the original vehicle speed in synchronization with the operation of the steering wheel to return to the straight-line driving state, only the operation of the steering wheel is used to reduce the vehicle speed to an appropriate speed. , you can do the in-situ steering action, etc., and can save the troublesome driving speed change operation, but there is a problem that the work efficiency is reduced due to deceleration when performing operations that do not require in-situ steering. Problems with degraded running performance during deceleration

In addition, if the vehicle speed deceleration ratio relative to the amount of steering wheel operation is reduced, there is a problem that a sharp steering action cannot be obtained on the road or on dry ground, and the performance of direction change (steering in situ) especially when working on dry ground is degraded.

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