To provide a power tool and a fan for a power tool, wherein vibration upon cutting and noise by vibration can be suppressed.
The device comprises hub 9 set forth in a motor axis, a plural of wings 10 overstretching to an outer direction of a radius of the hub 9, a connection part 4 wherein a spindle part defined as 4a is set forth on a whole under connecting in a ring state to the position against the plural of wings 10, a ring state resin 21 having different Young's modulus from that of the spindle 4a which is fit pressed into ring shaped ditches set forth in the spindle 4a. The spindle 4a is positioned in the place most far from a rotating center of an armature axis 8, by which inertial moment of a cooling fan can be increased. Further, a ring shaped resin 21 having different modulus from the spindle 4a is fit pressed into a part of the ring shaped spindle 4a in the ring shaped connection part 4.
COPYRIGHT: (C)2008,JPO&INPIT
ONOSE AKIRA
UCHIDA HIROKI
| JPH06218703A | 1994-08-09 |