초록 ▼

A hand-held power tool, particularly a chipping tool has an impact-damping arrangement for damping axial impacts of a striking member against a working tool. The arrangement includes a shaped member which is firmly and axially movably held on an outwardly extending portion of the tool and constitute

A hand-held power tool, particularly a chipping tool has an impact-damping arrangement for damping axial impacts of a striking member against a working tool. The arrangement includes a shaped member which is firmly and axially movably held on an outwardly extending portion of the tool and constituted by an elastic material. The shaped member has a substantially radial abutment face which abuts against a face of a tool holder in striking and noise-damping manner and radially overlaps an opening of a receiving recess of the tool holder so as to serve simultaneously for protection from dust.

대표청구항 ▼

A hand-held power tool, particularly a chipping hammer, comprising a tool holder having an axis, and a receiving recess comprising an annular section arranged for non-rotatably and axially movably receiving a shaft of a tool and having an inlet opening, so that a portion of the tool extends outwardl

A hand-held power tool, particularly a chipping hammer, comprising a tool holder having an axis, and a receiving recess comprising an annular section arranged for non-rotatably and axially movably receiving a shaft of a tool and having an inlet opening, so that a portion of the tool extends outwardly beyond said tool holder in direction toward a workpiece, said tool holder having a front axial end face at one end which is opposite to the shaft receiving end, and a front axial end portion adjacent to said front axial end face; a striking mechanism arranged to transmit impact energy and to impart reciprocating movement to the tool; and an impact damping arrangement arranged for damping of axial impacts of the tool against the power tool, said arrangement including a shaped member which is constituted of a substantially elastic material and firmly and axially immovably held only on the tool without being held on another part of the power tool, so that when the tool moves axially, said shaped member is unimpededly moved axially by and together with the tool, said shaped member having a substantially radial face which abuts against a face of said tool holder in striking and noise-damping manner and radially overlaps said inlet opening of said receiving recess so as to serve simultaneously for protection from dust, said face of said tool holder being located at said tool holder side and facing in said direction toward a workpiece and being accessible for and in direct contact with said radial face of said shaped member at said side, said shaped member having a cylindrical bush which is received in said annular section of said receiving recess and reciprocates together with the tool without being completely axially withdrawn from said annular section and so as to provide axial impact damping between the tool and the tool holder, damping of noise and protection from dust, said shaped member also having an outer sleeve which surrounds said cylindrical bush at a radial distance therefrom and coaxially therewith, said outer sleeve overlapping said front axial end portion of said tool holder in a substantially cup-like manner so as to serve for protection from dust and damping noise.