Linear drive device with two motors

Details Linear drive device with two motors Linear drive device with two motors

1984-04-23

1985-01-15

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 83, 310112, 74 25, 74 8915, 74127, H02K 706, H02K 720, F16H 2116

Patent

active

044940254

ABSTRACT:
The linear feed device is suitable for extremely slow feed rates or extremely small feed steps. It works with two motors (M.sub.1, M.sub.2) which drive a nut (16) and a screw spindle (2) via an intermediate drive (12-15; 22-25). The intermediate drives have slightly different transmission ratios, e.g., 1:0.340909 and 1:0.3414634.
With a thread pitch of 2 mm of the spindle, this results, with the same direction of rotation of the motors, in about 0.0013 mm advance per revolution of the motor shafts. With the help of step motors, therefore, extremely small advance steps can be achieved.

REFERENCES:
patent: 3407680 (1968-10-01), Westmoreland
patent: 3824420 (1974-07-01), Stegeman
patent: 3855487 (1974-12-01), Boisseau
patent: 4066922 (1978-01-01), Hennemann
patent: 4122377 (1978-10-01), Drummond
patent: 4288168 (1981-09-01), Mayr et al.

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