| 摘要 |
A chuck for receiving and holding the shank of a drilling tool includes a chuck member with a central bore. An anvil for transmitting axially directed percussive force extends into a rear end of the central bore. Clamping jaws are movable in guide channels formed in the chuck member extending into the central bore ahead of the anvil for frictionally locking the shank. In the region of the chuck member into which the anvil is located, there is a radially extending passageway through the chuck member extending between the central bore and a guide channel. A retaining member is radially displaceable through the passageway and has a dimension so that it can project outwardly or inwardly from the passageway. When the remaining member extends radially inwardly from the passageway, it can seat within an annular groove in the anvil and hold the anvil in a position so that it does not transmit percussive force. If the retaining member extends radially outwardly from the passageway, it can seat within a groove in a clamping jaw and secure the clamping jaw out of frictional contact with the shank. |
