DEVICE FOR MAKING HOLES IN GROUND Russian patent published in 1994 - IPC

FIELD: hole making equipment. SUBSTANCE: device has drive shaft, eccentric bushings, conical rollers, rings, motor with body and device feed mechanism. Eccentric bushings are attached to drive shaft. Longitudinal axes of conical rollers are located at angle to longitudinal axis of drive shaft. Rollers have hollow at their end. Each hollow has bearing surface of spherical shape. Rings are installed to rotate relative to conical rollers. Each ring is installed to interact with its spherical side outer surface with hollow on end of respective roller. Device feed mechanism is made in form of holder installed to rotate relative to motor body. Attached to outer surface of holder is spiral blade for interaction with ground. Motor body has longitudinal ribs for receiving reactive torque. Motor output shaft is connected with device feed mechanism through planetary reducing gear located inside holder. One of sun gear-wheel of planetary reduction gear is kinematically connected with drive shaft. Longitudinal axis of holder is located on longitudinal axis of drive shaft. Lead of spiral blade does not exceed t_r·i, where t_r is roller feed value for one revolution of drive shaft-holder gear ratio. EFFECT: higher efficiency. 6 cl, 3 dwg