Power tool for a circular saw or other rotating tool has a locking pin moved in an out of action by a rotating tool key to work with a block to replace or exchange the tool in a simple action without a special locking tool

摘要

The power tool has a mounting system for the rotating tool with a locking pin (33) which is rotated by a tool key (23) in the passage channel (28), such as for a circular saw blade (4). The tool shifts the pin between a position displaced from the block (30) so that it is inoperative, and an operative position in an opening (32) in the blocking section. When in the inoperative position, the locking pin (33) is held by spring pressure against a limit stop. When the tool key (23) is inserted into the passage opening (24) of the mounting screw (18), it is pushed by the tool key (23) against the spring pressure into the working setting.