Patent ID: 11904448
Assignee: HILTI AKTIENGESELLSCHAFT
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 1:
2. A hand-held power tool having
a handle,
a machine housing,
a tool holder in which a tool is guided along a working axis,
an electric motor for driving a pneumatic impact mechanism,
the pneumatic impact mechanism, which has an exciter piston coupled to the electric motor, an impact piston, and a pneumatic chamber coupling the exciter piston to the impact piston,
an acceleration sensor for sensing an acceleration along a working axis of the machine housing,
a sensor for sensing a phase of the exciter piston,
an evaluation unit for determining a pressing force, selected from the group consisting of a low pressing force, a medium pressing force, and a high pressing force, on the basis of the sensed phase of the exciter piston and the sensed acceleration along the working axis of the machine housing, and
a control unit for setting a rotational speed of the electric motor, wherein the control unit sets the rotational speed in response to the pressing force.