HYDRAULIC DRIVE VEHICLE

摘要

PROBLEM TO BE SOLVED: To compensate a turning radius difference without providing a special structure for the first hydraulic motor in a hydraulic drive vehicle of an articulate type in which the turning radius difference arises between the first and second wheels which are each supported by the first and second frames and each driven by the first variable-displacement hydraulic motor and the second fixed-displacement hydraulic motor.

SOLUTION: The second frame is provided with a cam push-member having a cam face in such a manner that its relative displacement is not allowed. The first frame is provided with a cam driven-member in such a manner that its relative displacement around a pivot axis is not allowed, and its relative displacement toward the first direction is allowed. The cam face is configured so that the cam driven-member moves toward the first direction by an amount corresponding to the swing amount of the first and second frames around the pivot axis. The volume amount of the first hydraulic motor is increased or decreased by using the movement of the cam driven-member toward the first direction.

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