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US 11,945,085 B2Granted
Hand-held power tool
AssigneeHilti Aktiengesellschaft
InventorsManfred Ludwig, Erwin Manschitz, Josef Fünfer
Life of this patent
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Abstract
A hand-held power tool, in particular a hammer drill or combination hammer, having a tool fitting for holding a striking and rotating tool on a working axis, an electric motor coupled to a transmission shaft, an impact mechanism, which has a striker that is moved periodically along the working axis, and having a rotary drive, which drives a guide tube carrying the tool fitting in rotation about the working axis, wherein the rotary drive is coupled to the transmission shaft via a rocker lever.
Claims9
A hand-held power tool comprising:
- a tool fitting for holding a striking and rotating tool on a working axis;
- an electric motor coupled to a transmission shaft;
- an impact mechanism having a striker movable periodically along the working axis;
- and
- a rotary drive drives a guide tube carrying the tool fitting in rotation about the working axis, the rotary drive being coupled to the transmission shaft via a rocker lever;
- wherein the impact mechanism has a transmission component for converting the rotary movement of the transmission shaft into a periodic movement in translation parallel to the working axis;
- wherein the impact mechanism has an exciter piston connected to the transmission component, and a pneumatic chamber, wherein the striker is coupled to the exciter piston via the pneumatic chamber;
- and wherein the rotary drive and the impact mechanism are coupled to the transmission shaft such that an advancing movement of the exciter piston takes place in a phase-shifted manner with respect to a torque transmission via a swivel sleeve.
5 more elements
Dependencies are inferred from the claim text.