Title:
ROTOR OF MOTOR FOR MOTOR-DRIVEN TOOL
Document Type and Number:
Japanese Patent JP3752933
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prolong the lifetime of a motor driven tool by improving durability of a rotor and to improve the efficiency of the motor, by reducing a heating loss of the motor providing a sufficient dust protecting function, without having to lower the cooling performance of the motor.
SOLUTION: Both ends of a wedge 5 are extended, so as to cover maximum outer diameter parts (protrusion 15) of the coil ends disposed at both sides of the rotor core 2 of a rotor coil. Thus, the extended part of the wedge 5 is disposed at the outside of a protrusion 15a and a recess 15b.
Inventors:
Yokota Tomoyoshi
Jinichi Yokoyama
Jinichi Yokoyama
Application Number:
JP35123599A
Publication Date:
March 08, 2006
Filing Date:
December 10, 1999
Export Citation:
Assignee:
Hitachi Koki Co., Ltd.
International Classes:
H02K3/487; H02K23/26; (IPC1-7): H02K3/487; H02K23/26
Domestic Patent References:
| JP11089201A |