Tool retaining device for retaining tool bits, has tool bit including non-circular cross section for engaging with non-circular engaging hole of housing and socket opening of tool stem, and tool bit movable relative to housing

摘要

The device (1) has a housing (10) including a chamber (20) formed and communicating with an engaging hole (11) of the housing. A tool bit (8) is engaged into a socket opening of a tool stem (30) and slidably engaged in the engaging hole of the housing. The tool bit includes a non-circular cross section for engaging with a non-circular engaging hole of the housing and the socket opening of the tool stem, and for allowing the tool bit to be selectively rotated by the tool stem or the housing. The tool bit is movable relative to the housing and selectively movable into a chamber of the housing.