Armature for high-speed electric motors force-ventilated in air containing abrasive dust
First Claim
1. Armature for a high-speed electric motor force-ventilated in air containing abrasive dust, said armature having end faces and an armature longitudinal direction and comprising:
- an armature shaft;
an armature laminate stack on the armature shaft, said armature laminate stack being provided with a plurality of slots;
windings laid in said slots of said armature laminate sack and extended in said armature longitudinal direction to form winding overhangs on both of the end faces of the armature, each of said winding overhangs having a waist corresponding to a smallest diameter of said winding overhangs;
a plurality of elongated, elastic slot seals holding said windings in said slots, connected to said winding overhangs and extending on said winding overhangs to said waists; and
means for securing said slot seals on the end faces of said armature.
1 Assignment
0 Petitions
Accused Products
Abstract
The armature (1) for high-speed electric motors force-ventilated in air containing abrasive dust, in particular in electric tools including right angle grinders, has windings which are laid in slots (7) of an armature laminate stack (5), and are held down in the slots (7) by elongated, elastic slot seals (15), and forth winding overhangs (9, 11) on the end faces of the armature. To increase the strength of the armature winding, the resistance to cooling air containing abrasive dust, and to improve the cooling, the slot seals (15) project over the slots (7), follow the contour of the winding overhangs (9, 11), in particular along surface lines, in the armature longitudinal direction, extend up to the end faces of the armature (1), and their ends are secured there by a ring (19) or cord winding (17).
29 Citations
10 Claims
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1. Armature for a high-speed electric motor force-ventilated in air containing abrasive dust, said armature having end faces and an armature longitudinal direction and comprising:
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an armature shaft; an armature laminate stack on the armature shaft, said armature laminate stack being provided with a plurality of slots; windings laid in said slots of said armature laminate sack and extended in said armature longitudinal direction to form winding overhangs on both of the end faces of the armature, each of said winding overhangs having a waist corresponding to a smallest diameter of said winding overhangs; a plurality of elongated, elastic slot seals holding said windings in said slots, connected to said winding overhangs and extending on said winding overhangs to said waists; and means for securing said slot seals on the end faces of said armature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification