| 摘要 |
A tool holder (2) for an electrically powered hammer comprising: a tube-like tool holder body (66) which can be fitted to the front of the hammer and having a forward end for non-rotatably receiving a shank (3) of a tool or bit wherein said forward end is formed with a single axially extending slot (10); a single locking body (54) extending through said slot for releasably engaging an axially extending closed groove (88) formed in a tool fitted in said forward end of the tool holder body (66); and a locking ring (52) which surrounds the tool holder body and in a locked position locks the locking body in a radially inward position in which the locking body is engageable with the groove in the tool and in a release position allows the locking body to move into a radially outward position to allow a tool to be inserted into or removed from the forward end of the tool holder body. The locking ring (52) is shiftable in a direction transverse to the fore-aft axis of the tool holder body to allow the locking body to move into a radially outward position. A manually actuable tool release member (50) can be actuated to move the locking ring (52) between the locked position and an intermediate position, in which intermediate position the locking ring is shiftable in a direction transverse to the fore-aft axis of the tool holder body to its release position to allow the locking body to move into a radially outward position. In the locked position the locking ring (52) engages a protrusion (55) on the tool release sleeve in order to lock the locking ring in its locked position. <IMAGE> |
