Electric power tool
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsItaru Murui, Hiroaki Murakami, Mitsumasa Mizuno, Akiko Honda, Satoshi Kajiyama
Life of this patent
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Abstract
An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.
Claims15
An electric power tool comprising:
- a driving shaft that is rotated by a motor;
- an output shaft on which a front-end tool is attachable;
- and
- a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft, wherein:
- the torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft,
- the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces,
- the magnet coupling has a function of applying an intermittent rotary impact force to the output shaft by losing synchronization, and
- the driving magnet member is coupled to the driving shaft so as to be rotatable relative to the driving shaft.
Dependencies are inferred from the claim text.