Work vehicle

A work vehicle comprising:

• a plurality of traveling wheels supported via expandable and contractible tubular support members to a vehicle body frame;
• a hydraulic operation type vehicle height adjustment mechanism provided for each one of the traveling wheels, the vehicle height adjustment mechanism capable of switching a relative height of the traveling wheel relative to the vehicle body frame within a predetermined length range by expanding and contracting the support member by a hydraulic cylinder;
• a hydraulic control valve capable of controlling feeding state of work oil to each one of the plurality of hydraulic cylinders;
• a controlling section for controlling an operation of the hydraulic control valve;
• and
• a variation state determiner for determining variation states of the vehicle body from a target ground clearance and from a target posture;
• wherein the controlling section controls operations of the hydraulic control valves to bring the vehicle body into the target ground clearance and the target posture, based on determination result of the variation state determiner.

A work vehicle comprising:

• a plurality of traveling wheels supported via expandable and contractible tubular support members to a vehicle body frame;
• a hydraulic operation type vehicle height adjustment mechanism provided for each one of the traveling wheels, the vehicle height adjustment mechanism capable of switching a relative height of the traveling wheel relative to the vehicle body frame within a predetermined length range by expanding and contracting the support member by a hydraulic cylinder;
• a load accommodation device mounted and supported on the vehicle body, the load accommodation device accommodating a load whose weight varies in association with continuation of a work;
• a hydraulic control valve capable of controlling feeding state of work oil to each one of the plurality of hydraulic cylinders;
• a controlling section for controlling an operation of the hydraulic control valve;
• and
• an accommodation amount determiner for determining an accommodation amount of the load;
• wherein the controlling section obtains a target operation amount for the hydraulic cylinder required for stabilizing a weight balance of the vehicle body based on determination result of the accommodation amount determiner and controls operation of the hydraulic control valve so that an operation amount of the hydraulic cylinder may become the target operation amount.