Working vehicle

A working vehicle, comprising:

• a drive source, drive wheels,
• a speed change output shaft for outputting rotational power toward the drive wheels;
• a main speed change structure for changing a speed of rotational power from the drive source and operatively transmitting the resulting rotational power to the speed change output shaft;
• a speed change operation member, an output sensor for directly or indirectly detecting a rotational speed of the speed change output shaft;
• and
• a control device responsible for operational control of the main speed change structure, wherein the main speed change structure comprises a continuously variable speed change structure for changing a speed of rotational power operatively input from the drive source in a stepless manner, and a multi-speed speed change structure capable of switching between at least a first power transmission state with a first gear ratio and a second power transmission state with a second gear ratio providing a higher speed than the first gear ratio,
• wherein the control device, based on a detection signal of the output sensor, is configured to cause the continuously variable speed change structure to be accelerated to a forward travel side in accordance with an accelerating operation of the speed change operation member in a forward travel direction while causing the multi-speed speed change structure to be in a first power transmission state,
• wherein when in a low speed state until the rotational speed of the speed change output shaft reaches a predetermined switching speed the control device is configured to cause the continuously variable speed change structure to be decelerated to a second power transmission state reference speed while causing the multi-speed speed change structure to be changed from the first power transmission state to a second power transmission state,
• wherein when the rotational speed of the speed change output shaft reaches the switching speed the control device is configured to cause the continuously variable speed change structure to be accelerated from the second power transmission state reference speed to the forward travel side in accordance with an accelerating operation of the speed change operation member to the forward travel side while causing the multi-speed speed change structure to be in the second power transmission state, and
• wherein when in a high speed state in which the rotational speed of the speed change output shaft is higher than the switching speed the switching speed is set to exceed a work speed range.