Electric motor and electric tool having the motor

Details Electric motor and electric tool having the motor Electric motor and electric tool having the motor

2005-12-13

2008-11-11

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

07449810

ABSTRACT:
In a circular saw, an end plate provided on an end of a rotor core has a cylindrical shaft insulator and a plate extending radially from the shaft insulator. The plate is disposed at a position separated from the end of the rotor core. The plate includes slot parts, and air holes that penetrate the plate in the axial direction of the rotor shaft at areas adjacent to the rotor shaft. Protruding parts are provided on the shaft insulator on both sides of each air hole, extending in the axial direction of the rotor shaft and protruding radially outward with respect to the rotor shaft. The shaft insulator has an outer diameter D1that is smaller than a diameter D2of the plate in the slot parts adjacent to the rotor shaft.

REFERENCES:
patent: 3315105 (1967-04-01), Moore, Jr.
patent: 4063123 (1977-12-01), Herr et al.
patent: 4967111 (1990-10-01), Andrieux et al.
patent: 5304885 (1994-04-01), Wong et al.
patent: 5449963 (1995-09-01), Mok
patent: 6707198 (2004-03-01), Debelius
patent: 1-283037 (1989-11-01), None
patent: 2002-186216 (2002-06-01), None

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