Power tool
AssigneeMakita Corporation
InventorsShinji Hirabayashi, Kenichi Ota
Life of this patent
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Abstract
To provide a hand-held power tool which is equipped with a motor and can be used in a normal driving mode for a tip end tool and also in driving modes other than the normal driving mode. A power tool in which a tip end tool is driven by a motor to thereby perform a predetermined machining process on a workpiece, wherein the motor is a dual rotor motor comprising: an inner rotor; an outer rotor; and a stator including a driving coil mechanism, with the inner rotor and the outer rotor being coaxially disposed.
Claims29
A power tool which performs a predetermined operation on a workpiece with a tool bit driven by a motor, wherein:
- the motor comprises an inner rotor, an outer rotor and a stator having a driving coil mechanism and is configured as a dual rotor motor in which the inner rotor and the outer rotor are coaxially arranged,
- the tool bit is driven by using one of the inner rotor and the outer rotor, and a rotatable fan is driven by using the other rotor, and
- the inner and outer rotors both provide a drive toward the tool bit.
A power tool which performs a predetermined operation on a workpiece with a tool bit driven by a motor, wherein:
- the motor comprises an inner rotor, an outer rotor and a stator having a driving coil mechanism and is configured as a dual rotor motor in which the inner rotor and the outer rotor are coaxially arranges, and
- the outer rotor has an extending region formed on one end of the outer rotor in the longitudinal direction and extending forward of front ends of the stator and the inner rotor in the longitudinal direction, and wherein a fan is disposed inside of the extending region of the outer rotor.
Dependencies are inferred from the claim text.