Control method for a power tool and a power tool
AssigneeHilti Aktiengesellschaft
InventorsAlbert Binder, Dieter Profunser, Alexander Hoop
Life of this patent
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Abstract
A control method for a power tool and a power tool is disclosed. The control method has an operating mode and a safety mode. In the operating mode, a motor drives a tool receptacle in a rotating manner. In the operating mode, the motor has a power consumption in the amount of at least an operating value. The safety mode is triggered if a sensor device detects a rotational blockade of the tool receptacle. In the safety mode, a clutch that is switchable by electrical signals located in the drive train between the motor and tool receptacle is periodically opened and closed and a power consumption of the motor is reduced as compared to the operating value.
Claims8
A control method for a power tool, comprising the steps of:
- driving a tool receptacle by a motor in a rotating manner around a working axis in an operating mode, wherein a power consumption of the motor has an operating value in the operating mode;
- and
- triggering a safety mode when a safety device detects a rotational blockade of the tool receptacle;
- wherein the safety mode further comprises the steps of:
- periodically varying a torque of a clutch that is arranged in a drive train between the motor and the tool receptacle;
- and
- reducing the power consumption of the motor in comparison to the operating value.
A power tool, comprising:
- a tool receptacle;
- a motor;
- a drive train, wherein a rotary movement of the motor is transmittable to the tool receptacle by the drive train;
- a clutch, wherein the clutch is arranged in the drive train;
- a sensor device, wherein a control signal is issuable by the sensor device when a rotational movement of the tool receptacle is blocked;
- an evaluation device, wherein a torque of the clutch is periodically variable by the evaluation device in response to the control signal;
- and
- a motor control unit coupled to the motor, wherein a power consumption of the motor is reducible by the motor control unit in response to the control signal.
Dependencies are inferred from the claim text.