Electromagnetic brake device for small-sized motor

Details Electromagnetic brake device for small-sized motor Electromagnetic brake device for small-sized motor

2005-04-22

2009-11-03

Le, Dang D (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

C310S077000

Reexamination Certificate

active

07612477

ABSTRACT:
An electromagnetic brake device (3) is assembled to a rear end section of a small-sized motor (1). The electromagnetic brake device (3) has a rotating disc (11) fixed to a motor rotation shaft (4), a sliding disc (12) slidable in an axial direction, a coil spring (13) pressing the sliding disc (12) to the rotating disc (11), and an electromagnet (14) capable of attracting the sliding disc (12) against spring force. A circular recess (16e) is formed in the center of a rear end surface of a yoke (16) of the electromagnet (14). In a state where the electromagnetic brake device (3) is assembled, a bearing (6) supporting a rear end shaft section (4b) of the motor rotation shaft is received in the circular recess (16e). As a consequence, no large circular dead space is produced at a portion on the outer periphery side of the bearing (6), which portion is between a motor end plate (5) and a rear end surface of the electromagnetic brake device (3). As a result, the length of the shaft of the small-sized motor (1) is suppressed from increasing.

REFERENCES:
patent: 2701036 (1955-02-01), Osborne
patent: 2911548 (1959-11-01), Joy et al.
patent: 4663550 (1987-05-01), Kawada et al.
patent: 09-049536 (1997-02-01), None
patent: 2005-090567 (2005-04-01), None
patent: 85/02952 (1985-07-01), None

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