Work vehicles

Abstract

To solve a problem of conventional work vehicle such as a tractor which is not always convenient in using a useful function.SOLUTION: A tractor that runs along a plurality of parallel straight paths, includes: a travel control mode switching instruction member 200 which instructs switching of a travel control mode between a straight control mode in which a vehicle body 100 travels straight along a straight path and a turn control mode in which the vehicle body 100 is turned to transfer from a straight path to a straight path; and a controller 400 for performing a travel control in either the straight control mode or the turn control mode according to the instruction from the travel control mode switching instruction member 200. When an instruction is given to switch the travel control mode from the straight control mode to the turn control mode, the controller 400 controls the travel of the vehicle body 100 to turn at a predefined turning radius no lower than the minimum turnable radius.SELECTED DRAWING: Figure 1

Claims

1. A work vehicle that travels along a plurality of parallel straight paths, A driving control mode switching instruction member provides instructions for switching between a straight-line control mode, in which the vehicle body is made to move in a straight line along a straight path, and a turning control mode, in which the vehicle body is made to turn to transition from one straight path to another. A controller that performs driving control in the straight-line control mode or the turning control mode according to the instruction given by the driving control mode switching instruction member, It is equipped with, When an instruction is given to switch the driving control mode from the straight-ahead control mode to the turning control mode, the controller performs driving control to turn the vehicle body so that the turn is performed at a predetermined turning radius that does not fall below the minimum turning radius. The aforementioned driving control mode switching indicator member has a lever located below the steering wheel, which protrudes to the left or right of the steering wheel with respect to the left-right direction of the vehicle body. A work vehicle characterized in that the instruction to select the turning direction to the controller, based on the left-right direction of the vehicle body, is performed using the direction in which the lever is operated.

2. The work vehicle according to claim 1, further comprising a manual correction instruction member for giving instructions for manual correction in the driving control performed in the straight-line control mode or the turning control mode.

3. The work vehicle according to claim 2, characterized in that the controller calculates the predetermined turning radius based on the input turning radius parameter.

4. The work vehicle according to claim 3, characterized in that the controller outputs a warning when the calculated predetermined turning radius falls below the minimum turning radius.

5. In the case where adjacent tilling work is performed, the turning radius parameter is the tilling work width and the tilling work overlap width, and the predetermined turning radius value is half the value obtained by subtracting the tilling work overlap width value from the tilling work width value, as described in claim 4.

6. The work vehicle according to claim 4, characterized in that, when furrowing work is performed, the turning radius parameter is the distance between adjacent furrows, and the value of the predetermined turning radius is half the value of the distance between adjacent furrows.

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