| 摘要 |
<p>The present invention relates to an automatic pitches control-type arm pitching machine which comprises: a frame; a power delivery unit consisting of a driving motor fixated on the frame and a reducer; a driving shaft; a sprocket including a protruded cylinder body formed with a hanging protrusion on one side; a main driving cam including the protruded hanging protrusion; a brake formed in an arc shape along a moving trajectory of a main axis of the main driving cam on the upper side of the main driving cam from the upper end of the frame, and including an elastic friction material formed inside; a slide plate including a semi-circle sliding guide; a slide pin including a pinion gear on the lower part; a rack gear connected to the pinion gear of the slide pin; an angle control motor moving along the sliding guide; a spring generating a rotation force; a pitching arm including a pitching handle on the end; a ball input unit including a ball installation sheet; and a control box including a control part controlling the driving motor and the angle control motor, and a switch. According to the present invention, the point of impact on a ball can be freely adjusted.</p> |
