Electric motor having rotation detection sensor

Details Electric motor having rotation detection sensor Electric motor having rotation detection sensor

1999-02-24

2000-01-11

Ramirez, Nestor

Electrical generator or motor structure

Dynamoelectric

Rotary

310177, H02K 1100

Patent

active

060139617

ABSTRACT:
In an electric motor having a rotation detection sensor, a pair of engagement recesses are provided on an axial end surface of a resin cylindrical body of a commutator. A permanent magnet is held around a rotary shaft of the motor with its one axial end surface being in abutment with the axial end surface of the cylindrical body. A pair of engagement recesses is provided on the other axial end surface of the magnet. A resin busing having a cylindrical part and a disk part is fitted on the rotary shaft at the side of the other axial end surface of the magnet. A pair of engagement protrusions is formed on the cylindrical part to be engaged with the engagement recesses of the cylindrical body, thereby restricting a relative movement between the bushing and the cylindrical body. Further, a pair of engagement protrusions is formed on the disk part to be engaged with the engagement recesses of the magnet, thereby restricting a relative movement between the bushing and the magnet. Thus, the magnet of the rotation sensor is fixedly mounted around the rotary shaft without using an adhesive bond.

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