Commutator arrangement for a miniature motor

Details Commutator arrangement for a miniature motor Commutator arrangement for a miniature motor

1986-07-21

1987-05-26

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, 310 42, 310 91, H02K 1304

Patent

active

046688889

ABSTRACT:
A miniature motor having a rotor comprising a commutator having locating projections formed on the commutator reference surface coming in contact with a rotor core, and a rotor core having thereon locating key holes for engaging with the locating projections; the commutator being fitted to the rotor core by engaging the locating projections with the locating key holes until the commutator reference surface comes in contact with the rotor core; in which each of the locating projections has a temporary insertion portion at the tip thereof, whose cross-section is smaller than the cross-section of the locating key hole, and a full insertion portion for engaging with the locating key hole; the full insertion portion has such a length that the commutator tongue of the commutator is located at a position higher than the height of the rotor windings in a state where the temporary insertion portion is inserted into the locating key hole.

REFERENCES:
patent: 1901955 (1933-03-01), Giamo
patent: 3042998 (1962-07-01), Sweet et al.
patent: 3679923 (1972-07-01), Harper et al.

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