Working robot

A working robot, comprising:

• a robot body;
• a movement unit including a movement motor configured to move the robot body;
• a working unit including a working motor supported by the robot body;
• a height adjustment unit including a height adjustment motor configured to change a height level of the working unit relative to the robot body;
• an input unit including an input interface configured to receive an input from a user;
• and
• a control unit,
• wherein
• the control unit is configured to execute an autonomous operation including:
• a working process of causing the working unit to work while moving the robot body by the movement unit;
• and
• a height adjustment process of causing the height adjustment unit to adjust the height level of the working unit relative to the robot body in multiple steps;
• the control unit is configured to execute the height adjustment process based on an input value input to the input unit;
• the height adjustment process includes:
• a first height adjustment process of causing the height adjustment unit to set the height level of the working unit relative to the robot body to an initial height level, and
• a second height adjustment process of causing the height adjustment unit to change the height level of the working unit relative to the robot body from the initial height level to a target height level;
• the input value includes at least one of the initial height level and the target height level;
• the control unit is configured to execute the second height adjustment process in multiple steps such that the height level of the working unit relative to the robot body is changed in multiple steps from the initial height level to the target height level;
• each time a step included in the multiple steps of the second height adjustment process is completed, the control unit executes the working process until a predetermined condition is satisfied and then starts a next step of the second height adjustment process;
• the control unit is configured to acquire a working field area;
• the predetermined condition includes a condition based on the working field area;
• the predetermined condition includes a condition that a duration during which the working unit works after a step included in the multiple steps of the second height adjustment process is completed exceeds a working duration threshold determined based on the working field area;
• and
• the working duration threshold is set to be higher for larger working field area.

A working robot comprising

• a robot body:
• a movement unit including a movement motor configured to move the robot body;
• a working unit including a working motor supported by the robot body:
• a height adjustment unit a height adjustment motor configured to change a height level of the working unit relative to the robot body;
• a control unit configured to execute an autonomous operation including:
• a working process of causing the working unit to work while moving the robot body by the movement unit, and
• a height adjustment process of causing the height adjustment unit to adjust the height level of the working unit relative to the robot body in multiple steps;
• and
• a rechargeable battery configured to supply power to the working robot,
• wherein
• the autonomous operation further includes a charging process of causing the working robot to return to a charging station to recharge the battery, and
• in the height adjustment process, the control unit causes the height adjustment unit to change the height level of the working unit relative to the robot body when the working robot is located at the charging station, whereas the control unit does not cause the height adjustment unit to change the height level of the working unit relative to the robot body when the working robot is not located at the charging station.