Electric power tool
AssigneeMakita Corporation
InventorRyunosuke Kumagai
Life of this patent
Estimating the term…
Abstract
An electric power tool capable of suppressing damage to a fan housed in a housing to cool a motor due to foreign matter without increasing the number of parts. An impact driver includes a motor, a centrifugal fan attached to an output shaft of the motor to cool the motor, an annular air collecting member disposed between the motor and the centrifugal fan to collect cooling air by the centrifugal fan, a housing that houses the motor, the centrifugal fan, and the air collecting member, and ventilation windows formed in the housing to communicate between the inside and the outside of the housing on the outer side of the centrifugal fan. The air collecting member is provided with wall bodies positioned on the inner side of the ventilation windows.
Claims10
An electric power tool comprising:
- a housing;
- a motor housed in the housing;
- a centrifugal fan housed in the housing and attached to an output shaft of the motor to cool the motor;
- an annular air collecting member housed in the housing and disposed between the motor and the centrifugal fan to collect cooling air by the centrifugal fan;
- a ventilation window formed in the housing to communicate between inside and outside of the housing on an outer side of the centrifugal fan;
- and
- a wall body provided on the air collecting member and positioned on an inner side of the ventilation window.
Dependencies are inferred from the claim text.