Working vehicle
AssigneeKubota Corporation
InventorsKazuo Koike, Hirokazu Ito
Life of this patent
Estimating the term…
Abstract
A riding work vehicle that includes a running electric motor unit running and driving a driving wheel unit; a speed setting operation unit operated by a driver to set a target running speed; a working electric motor driving a work device that performs work on a worked object around a vehicle body corresponding to running of the vehicle body; and an exceptional speed controller that performs exceptional speed control to control the running electric motor unit at an exceptional speed lower than the target running speed in a case where load of the working electric motor evaluated by a work load evaluator that evaluates load of the working electric motor is abnormal load higher than a threshold value.
Claims10
A riding work vehicle comprising:
- a vehicle body having a driver seat;
- a driving wheel unit supporting the vehicle body;
- a running electric motor unit which runs and drives the driving wheel unit;
- a speed setting operation unit operated by a driver to set a target running speed of the vehicle body;
- a running controller which controls the running electric motor based on the target running speed;
- a work unit having a work device that performs work on a worked object adjacent the vehicle body corresponding to running of the vehicle body, and at least one working electric motor that drives the work device;
- a work controller controlling the working electric motor;
- a work load evaluator that evaluates load of the at least one working electric motor;
- and
- an exceptional speed controller that performs exceptional speed control to control the running electric motor unit at an exceptional speed lower than the target running speed in a case where the load of the at least one working electric motor evaluated by the work load evaluator is an abnormal load higher than a threshold value,
- wherein the target running speed by the speed setting operation unit is canceled until the value of the target running speed by the speed setting operation unit becomes equal or less than the exceptional speed when the exceptional speed control is performed.
A riding work vehicle comprising:
- a front wheel unit having a pair of right and left free rotating caster-type front wheels;
- a rear wheel unit having a pair of right and left driving rear wheels;
- a vehicle body supported by the front wheel unit and the rear wheel unit;
- a running electric motor unit which runs and drives the rear wheel unit;
- a speed setting operation unit comprising a left steering lever and a right steering lever operated by a driver to set a target running speed of the vehicle body;
- a running controller which controls the running electric motor based on the target running speed;
- a work unit having a work device that performs work on a worked object adjacent the vehicle body corresponding to running of the vehicle body, and a working electric motor that drives the work device;
- a work controller controlling the working electric motor;
- a work load evaluator that evaluates load of the working electric motor;
- and
- an exceptional speed controller that performs exceptional speed control to control the running electric motor unit at an exceptional speed lower than the target running speed in a case where the load of the working electric motor evaluated by the work load evaluator is an abnormal load higher than a threshold value,
- wherein when the exceptional speed control is performed, the target running speed by the speed setting operation unit is canceled until the value of the target running speed by the speed setting operation unit determined by the position of the left and right steering levers becomes equal or less than the exceptional speed.
Dependencies are inferred from the claim text.