Hilti Aktiengesellschaft

Laurent-Sebastian Kock

Franz Moessnang

Markus Hartmann

Eduard Pfeiffer

Philipp Lorenz

Karl Neuper

Franz MÖSSNANG

A control method for a percussive hand-held power tool () includes the steps: detecting a switching state of an operating button (), detecting a temperature T using a temperature sensor (), activating an electropneumatic striking mechanism () in response to an actuation of the operating button (), an exciter () of the electropneumatic striking mechanism () being moved forward and backward along a working axis () at a repetition rate R, whereby a striker () coupled to the exciter () via a pneumatic chamber () is also moved. If the temperature T is greater than a limiting temperature Tc, the repetition rate R is continuously increased from idle up to a setpoint value (). A duration until reaching the setpoint value () is less than 10 cycles. If the temperature T is less than the limiting temperature Tc, a duration until reaching the setpoint value () is greater than 200 cycles.

Control method for a percussive hand-held power tool

A power tool has a tool holder, an electric motor, a handle, and a main switch for switching on the electric motor. The power tool executes the following control method. The main switch is scanned to see whether it has been actuated. A start inhibitor transmits a blocking signal to a motor controller if the main switch is actuated before the power tool has been connected to the power supply. An activator receives signals from a control unit separate from the electric power tool, compares the received signals with a predefined signature and transmits a release signal to the motor controller if the received signal corresponds to the predefined signature. The motor controller switches on the electric motor in response to actuation of the main switch if the start inhibitor is not transmitting a blocking signal or the activator is transmitting a release signal.

Control method for an electric power tool

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Poing, Germany

Laurent-Sebastian Kock