| 摘要 |
A self-propelling machine comprising a frame; a pair of actuators each provided with a respective hub coaxial to the other and able to support and actuate in rotation a respective wheel, each actuator comprising a control lever that is mobile with respect to the frame between at least a first operating position, in which the actuator actuates the respective wheel in a rotation direction, and at least a second operating position, in which the actuator actuates the respective wheel in the opposite rotation direction. The machine comprises an actuating group able to actuate the control levers of each actuator, the actuating group provided with a first body associated to the frame and mobile with respect thereto with a single first degree of freedom, and a second body associated to the first body and mobile with respect thereto with a single second degree of freedom and connected to the control levers, wherein the movement of the first body with respect to the frame involves movement of the control levers in different directions, one towards the first operating position and the other towards the second operating position, and the movement of the second body with respect to the first body involves movement in a same direction of the control levers, selectively towards the first or the second operating position. |
