Work vehicle

A work vehicle comprising:

• a motor;
• a traveling vehicle body on which the motor is mounted;
• a travel apparatus that is provided to the traveling vehicle body and is also driven by drive power from the motor;
• a drive apparatus that is capable of driving a work apparatus that performs work on a farm field;
• a speed change apparatus that receives an input drive power of the motor, changes a speed of the input drive power, and transmits the drive power to at least one of the travel apparatus and the work apparatus;
• a speed change operation device that includes a plurality of speed change stages and is also capable of speed change operation of the speed change apparatus by way of a human operation;
• a controller configured to output to the speed change apparatus a speed change command and which takes account of at least one defined speed change interval;
• and
• an operation mechanism that enables adjustment of the speed change interval,
• wherein the speed change controller comprises a main controller, an engine controller, and a speed change controller,
• wherein the at least one defined speed change interval is determined by an interval in which a speed change of the main speed change device does not occur until a predetermined interval has lapsed.

A work vehicle comprising:

• a motor;
• a traveling vehicle body on which the motor is mounted;
• a travel apparatus that is provided to the traveling vehicle body and is also driven by drive power from the motor;
• a drive apparatus that is capable of driving a work apparatus that performs work on a farm field;
• a speed change apparatus that receives an input drive power of the motor, changes a speed of the input drive power, and transmits the drive power to at least one of the travel apparatus and the work apparatus;
• a speed change operation device that includes a plurality of speed change stages and is also capable of speed change operation of the speed change apparatus by way of a human operation;
• a controller configured to output to the speed change apparatus a speed change command and which takes account of plural speed change intervals;
• and
• an operation mechanism that enables adjustment of each of the plural speed change intervals,
• wherein the controller comprises a main controller, an engine controller, and a speed change controller,
• wherein each of the plural speed change interval is one of a time interval and a distance interval, and
• wherein each of the plural speed change interval is determined by an interval in which a speed change of the main speed change device does not occur until a predetermined interval has lapsed.