Patent ID: 8655557

Claim:
A motor control device for a working vehicle, comprising: a rotational speed control device that controls a rotational speed of a motor in accordance with an operation amount of an accelerator pedal; a travel drive device that transmits rotation of the motor to wheels through a torque converter and a transmission; a speed ratio detection device that detects a speed ratio of an input shaft and an output shaft of the torque converter; and a speed restriction device that restricts the maximum rotations speed of the motor in accordance with a speed ratio detected by the speed ratio detection device; wherein: the speed restriction device reduces the maximum rotational speed by a restriction amount, wherein a value of an acceleration region restriction amount, which is set when a detected speed ratio is equal to or less than 1 and in the acceleration region of the rotational speed of the motor in which the detected speed ratio is equal to or greater than a first predetermined value and less than a second predetermined value which is greater than the first predetermined value, is greater than a value of a non-acceleration region restriction amount which is set when a detected speed ratio is equal to or less than 1 and in the non-acceleration region in which the detected speed ratio is less than the first predetermined value or equal to or greater than the second predetermined value.