| 摘要 |
PURPOSE: To simplify the adjustment of the angular position of retaining devices for angled heads driven by a drive, especially by a drilling gun. CONSTITUTION: For adjustments of the angular position of an angled head 10, 11 with respect to a drive unit 1, a bush 31 that can be screwed on threads 33 of a receiving nozzle 2 is provided to receive the angled head 10, 11. Pins 21 are disposed in the bush 31 axially slidably to retain or release balls 25. The receiving nozzle 2 has on its external surface a plurality of lengthwise grooves 29 in which the balls 25 are held. When the pins 21 are slid axially, the balls 25 are released, so that the bush 31 can rotate relative to the receiving nozzle 2 until the balls 25 engage in the lengthwise grooves 29 where they are retained by the pins 21. |
