Patent ID: 9427887
Filing Date: 2016-08-30
CPC Classification: B06B,B28B

Claim Text:
1. A vibration drive assembly for a concrete block molding machine that comprises a frame, a mold assembly supported on a frame for motion between a rest position and an elevated vibration position, two unbalanced vibrator shafts carried by the mold assembly and supported for rotation about respective vibrator shaft axes, each vibrator shaft having an eccentric center of mass such that each vibrator shaft produces off-axis force when rotated about its vibrator shaft axis; the vibration drive assembly comprising: two rotary servo motors; an electronic motor controller electrically coupled to the servo motors and configured to regulate the motors; and two articulated drive trains connectable between the servo motors and the vibrator shafts and configured to mechanically transmit rotational motion from the servo motors to the vibrator shafts, the servo motors and drive trains being in axial alignment with the vibrator shafts of the block molding machine mold assembly when the mold assembly is in its elevated vibration position.