US 8,292,002 B2 · Hand-held power tool for percussively driven tool attachments

Abstract

The invention relates to a hand-held power tool for predominantly percussively driven tool attachments, in particular hammer drills and/or a chisel-action hammers. The power tool has a percussion axis and an intermediate shaft that is parallel to the percussion axis and which has a first stroke generating device having a first stroke element for a percussion drive. Additionally, at least one additional second stroke generating device having at least one second stroke element is provided for driving a counter oscillator that is arranged on or about the intermediate shaft and can be driven by the intermediate shaft. A phase displacement that is different from zero and that is unequal to 180° takes place between a movement of the first stroke element and a movement of at least one second stroke element.

Claims20

Dependent claims

A hand-held power tool for insert tools primarily driven in a percussive fashion, in particular a rotary hammer and/or chisel hammer, comprising:

an impact axis;
an intermediate shaft parallel to the impact axis;
a first stroke producing device for an impact drive, the first stroke producing device having a stroke element;
and
at least one additional second stroke producing device that is situated in or on the intermediate shaft, which has the capacity to be driven by means of the intermediate shaft, which has at least one second stroke element, and which is for driving a counter-oscillator,
wherein between a motion of the first stroke element and a motion of the at least one second stroke element, a phase shift is provided that is not equal to zero and is also not equal to 180°.

3 more elements

Dependencies are inferred from the claim text.

Hand-held power tool for percussively driven tool attachments

Life of this patent

Hand-held power tool for percussively driven tool attachments

Life of this patent

Abstract

Claims20