Patent ID: 7303026
Filing Date: 2007-12-04
Classification: B25D

Abstract:
1. A hand power tool, comprising a housing; drive motor accommodated in said housing; a tool receptacle in which a tool is guided; a gear mechanism, a driving gear wheel, and rotary sleeve arranged so that via said gear mechanism and said driving gear wheel, said rotary sleeve and said tool receptacle are drivable in rotation; a crank drive mechanism and a hammering mechanism located inside said rotary sleeve, so that said tool receptacle is drivable through said crank drive mechanism and said hammering mechanism translationally; and a safety coupling provided between said driving gear wheel and said rotary sleeve and formed so that said safety coupling separates if a limit torque is exceeded, said safety coupling being formed as an overlock coupling seated on said rotary sleeve and having two axially adjacent coupling parts that mesh in a form-locked manner by torque-transmitting transmission elements and are releasable if the limit torque is exceeded counter to an axially acting elastic force, one of said coupling parts being a part associated with said driving gear wheel and rotatable relative to said rotary sleeve while the other of said coupling parts is coupled in a form-locked manner to said rotary sleeve in a way that transmits torque, wherein said one coupling part is formed as a coupling sleeve which is located on said rotary sleeve and relative to this axially nondisplaceably between said driving gear wheel and said other coupling part, said coupling sleeve on an axial face end oriented toward said other coupling part being provided with said torgue-transmitting elements meshing with torgue-transmitting elements of said other coupling part, and further comprising a bearing which supports said coupling sleeve in said housing, wherein said driving gear wheel, said coupling sleeve and said housing on a nonrotatable housing part each have an axially oriented spline shaft toothing on an outer circumferential face, wherein said toothings are aligned axially with one another; and further comprising a switching sleeve provided on said outer circumferential face in a region of said spline shaft toothings, said switching sleeve being axially displaceable by an actuating member and having on an inner circumferential face an inner toothing which corresponds to said spline shaft toothings and is in coupling engagement with said spline shaft toothing of either said driving gear wheel and said coupling sleeve, or only of said coupling sleeve, or of said coupling sleeve and said housing part, depending on an axial displacement position.