ELECTRIC POWER TOOL
First Claim
1. An electric power tool comprising:
- a motor including a drive shaft;
a tool output shaft arranged to be rotated by rotational force of the drive shaft;
a clutch unit configured to connect or disconnect a torque transmission line between the drive shaft and the tool output shaft in accordance with a load torque of the tool output shaft;
a load detector configured to output a load torque signal in accordance with the load torque of the tool output shaft; and
a control unit capable of performing a rising detection mode, which stops rotation of the motor when detecting a rising in the load torque signal, and a falling detection mode, which stops rotation of the motor when detecting a falling in the load torque signal,wherein the control unit is configured to select the rising detection mode or the falling detection mode based on a usage condition signal indicating a usage condition of the electric power tool.
3 Assignments
0 Petitions
Accused Products
Abstract
An electric power tool includes a motor having a drive shaft, a tool output shaft rotated by rotational force of the drive shaft, a clutch unit that connects or disconnects a torque transmission line between the drive shaft and the tool output shaft according to load torque of the tool output shaft, a load detector that outputs a load torque signal in accordance with the load torque of the tool output shaft, and a control unit that performs a rising detection mode, which detects rising of the load torque signal to stop rotation of the motor, and a falling detection mode, which detects falling of the load torque signal to stop rotation of the motor. The control unit selects the rising detection mode or the falling detection mode according to a usage condition signal indicating a usage condition of the electric power tool.
9 Citations
9 Claims
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1. An electric power tool comprising:
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a motor including a drive shaft; a tool output shaft arranged to be rotated by rotational force of the drive shaft; a clutch unit configured to connect or disconnect a torque transmission line between the drive shaft and the tool output shaft in accordance with a load torque of the tool output shaft; a load detector configured to output a load torque signal in accordance with the load torque of the tool output shaft; and a control unit capable of performing a rising detection mode, which stops rotation of the motor when detecting a rising in the load torque signal, and a falling detection mode, which stops rotation of the motor when detecting a falling in the load torque signal, wherein the control unit is configured to select the rising detection mode or the falling detection mode based on a usage condition signal indicating a usage condition of the electric power tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification