Patent ID: 7823574

Claim:
A ball-throwing machine comprising: a frame; a ball-throwing mechanism pivotally connected with the frame and up and down rotatable, whereby a ball fed into the ball-throwing mechanism being ejected from the mechanism; a first servomotor and a first linkage mounted between the frame and the ball-throwing mechanism, the first servomotor being clockwise and counterclockwise rotatable, whereby via the first linkage, the first servomotor driving the ball-throwing mechanism to swing up and down; a first angle sensor mounted between the frame and the ball-throwing mechanism for detecting the swinging angle of the ball-throwing mechanism; a circuit unit serving to receive a signal from the first angle sensor and control the operation of the first servomotor for moving the ball-throwing mechanism to a ball-throwing angle and making the ball-throwing mechanism swing up and down; a base; the frame having a bottom board pivotally connected on the base, whereby the frame is horizontally rotatable; a second servomotor and a second linkage mounted between the base and the frame, the second servomotor being clockwise and counterclockwise rotatable, whereby via the second linkage, the second servomotor driving the frame to swing horizontally; a second angle sensor mounted between the base and the frame for detecting the swinging angle of the frame; the circuit unit serving to receive a signal from the second angle sensor and control the operation of the second servomotor for making the frame swing left and right; a detector mounted on the ball-throwing mechanism, whereby when the ball-throwing mechanism ejects a ball, the detector creates a signal, the circuit unit receiving the signal to drive the frame to swing horizontally.