Drive for machining spindle

Details Drive for machining spindle Drive for machining spindle

1997-01-24

1998-07-21

Howell, Daniel W.

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

408124, 408238, 475298, 475331, B23C 100

Patent

active

057825939

ABSTRACT:
A drive has a housing, a machining spindle rotatable in the housing about an axis and adapted to carry a machine tool, and a motor in the housing having a stator fixed in the housing and surrounding the spindle and a rotor rotatable about the axis relative to the housing and to the spindle and surrounding the spindle. A gear transmission in the housing has an input connectable to the rotor and an output connectable to the spindle for rotating the spindle about the axis. This transmission is displaceable between a low-speed position with a sun gear meshing with planet gears and a planet carrier coupled to the spindle for rotating the spindle at a rate slower than that of the rotor and a high-speed position with the sun gear out of mesh with the planet gears and directly coupled to the spindle for rotating the spindle jointly with the rotor.

REFERENCES:
patent: 4189960 (1980-02-01), Holdeman
patent: 4483128 (1984-11-01), Hawkins
patent: 4805485 (1989-02-01), Ida
patent: 5006100 (1991-04-01), Brandt et al.
patent: 5011341 (1991-04-01), DeGroff
patent: 5083990 (1992-01-01), Rahm
patent: 5339908 (1994-08-01), Yokota et al.

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