Linear drive device with two motors

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

Filed on

1984-04-23

Date issued

1985-01-15

Examiner

Budd, Mark O.

Patent Class

Electrical generator or motor structure

SubClass

Dynamoelectric

SubSubClass

Rotary

Other Related Categories

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

Type

Patent

Status

active

Patent number

044940254

Description

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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