Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1989-09-06
1991-05-28
Stephen, Steven L.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 83, H02K 1304
Patent
active
050197398
ABSTRACT:
An engine starter includes a motor having a tubular armature rotation shaft, and a rotation output shaft arranged on one axial end side of the motor coaxially therewith to be axially slidably supported. A clutch mechanism is included for transmitting torque from the armature rotation shaft to a rotation output shaft and an electromagnetic switch which has a shifting member to push the aforementioned rotation output shaft by an electromagnetic force in the axial direction to slidably move it. The switch also brings movable contacts in touch with fixed contacts to supply power to the aforementioned motor. A rear part of the rotation output shaft and the front part of the shifting member are inserted into the armature rotation shaft tube from opposite directions. The shifting member of the electromagnetic switch, the armature rotation shaft and the rotation output shaft are all coaxially arranged to reduce the length of the starter. The coaxial arrangement is highly effective in preventing invasion of dust into the contact chamber of the electromagnetic switch. To ensure a compact size for the starter a compact spring is provided for restoring the rotation shaft to a rest position after the engine has started.
REFERENCES:
patent: 550407 (1895-11-01), Dice
patent: 4116077 (1976-11-01), Mazzorana
patent: 4587861 (1984-07-01), Morishita
patent: 4604907 (1984-11-01), Morishita et al.
patent: 4852417 (1989-08-01), Tanaka
patent: 4862027 (1989-08-01), Isozumi et al.
patent: 4912352 (1990-03-01), Isozumi et al.
patent: 4933587 (1990-06-01), Tanaka et al.
Isozumi Shuzoo
Tanaka Toshinori
Yagi Tetsuo
Mitsubishi Denki & Kabushiki Kaisha
Rebsch D. L.
Stephen Steven L.
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