PERCUSSIVE-ROTARY MECHANISM Russian patent published in 1995 - IPC

FIELD: jackhammers. SUBSTANCE: percussive-rotary mechanism has body 1 with disk cam 2 freely rotating in it. Disk working surfaces interact with rollers 3 to cause reciprocation of pushers 4, which is converted into translational motion of striker 8 and slider 9 by means of axles 5, levers 6 and axles 7. Pushers 4 are accommodated in hole of rod 10 square to its axis. Rod 10 is rotated by motor and striker may deliver blows against shank of tool spindle 11 when tool touches the handled material and tool spindle 11 is braked by tapered surfaces of ring 12 and cam 2 and tapered surface of body 1. EFFECT: higher efficiency. 2 dwg