Torque transmission for manual power hammer drill, etc.

摘要

The tool stem (3) end has several open, torque follower grooves (7,8) positively engaged by strip-shaped followers (9,10) of a tool holder (2), contg. at least one locking body (6), coacting with the stem locking groove (4,5) closed either side. A concentric bore (13) of the tool holder has an inner dia. (D2) for retaining tool stems of different dia. The extension of the torque followers can be adjusted to the dia. (D1) of the smallest tool stem, while the holder bore can be adjusted to the dia. of the largest tool stem. The torque followers provide the centring and holding of the tool stem.