Earth drilling apparatus has motor-gear unit, operating and holding unit, which is connected to motor-gear unit and auger, where motor-gear unit and auger are connected by torque-load limiting device

摘要

The earth drilling apparatus has a motor-gear unit, an operating and holding unit, which is connected to the motor-gear unit and an auger (7). The motor-gear unit and the auger are connected by a torque-load limiting device. The torque-load limiting device is radial tooth wheel coupling with a spring-loaded radial tooth wheel (2). The radial tooth wheel is longitudinally movable on a transmission output shaft (1).