Stepping motor drive

Details Stepping motor drive Stepping motor drive

1989-08-04

1990-11-27

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 75R, 235 95R, 235 96, H02K 3714, G01C 2202

Patent

active

049738674

ABSTRACT:
A device for setting a resettable mechanical counter, has a stepping motor (1) which is developed as two-phase stepping motor having a rotor (32) consisting of a permanent magnet (33) with diametrically opposite permanent magnet poles and a coil arrangement (10, 11) with coils which are arranged at an angular distance apart of, in particular, 90.degree.. The stepping motor is connected to the counter via a gearing (2). In order to effect the resetting of the counter with the same stepping motor and with a compact construction of the device, the stepping motor has a coil body (14) to receive the coils, the coil body being divided into two parts (15, 16). Bearings (36, 37) of the shaft of the rotor being so formed in the coil body that the shaft extends out of the coil body (14) on at least the front outer end (12). The coil body has, for this purpose, furthermore, fastening elements on one outer end of one of the two parts for the attachment of an intermediate body which encloses the gearing. A shaft with a pinion (13) which extends out of the forward end (12) of the coil body (1) engages into the gearing. Aside from the counter, the gearing is also connected via a freewheel clutch (91-94) to a resetting device (zeroing lever 89) of the counter (cipher roll 79).

REFERENCES:
patent: 4930094 (1990-05-01), Luitje et al.

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