Gear motor with an electric motor having a hollow shaft

Details Gear motor with an electric motor having a hollow shaft Gear motor with an electric motor having a hollow shaft

1994-09-23

1997-05-20

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 78, 310 92, 310 99, 254316, 117 13, H02K 710, H02K 7116, F16D 2712

Patent

active

056315112

ABSTRACT:
A gear motor (1), with an electric motor (4) whose rotor (7) has a hollow shaft (8), drives, through at least one gear box (26) with at least one drive step, at least one load. For the purpose of compact configuration combined with low vibration, there is coaxially disposed in the hollow shaft (8) an output shaft (19) which can be shifted selectively by means of a first clutch (24) to the hollow shaft (8), and by means of a second clutch (16) via the gear box (26) to the hollow shaft (8). Preferably the clutches are configured as magnetic clutches, and again preferably the first clutch (24) is disposed for the direct shifting of the hollow shaft (8) to the output shaft (19) at the one end of the hollow shaft (8), and the second clutch (16) at the other end of the hollow shaft (8). The gear motor (1) is used preferentially for driving rotary parts in crystal pulling apparatus.

REFERENCES:
patent: 1870076 (1932-08-01), Thomson
patent: 2180412 (1939-11-01), Hart
patent: 2600762 (1952-06-01), Hartz
patent: 3921770 (1975-11-01), Daab et al.
patent: 3974719 (1976-08-01), Tiliander
patent: 4185520 (1980-01-01), Henneman et al.
patent: 4298110 (1981-11-01), Toma
patent: 4367199 (1983-01-01), Jericho
patent: 4825988 (1989-05-01), Nishimura
patent: 5194057 (1993-03-01), Sommer
patent: 5269202 (1993-12-01), Kiyosawa et al.

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