Commutator winding end supports for electric machines
AssigneeRobert Bosch GmbH
InventorsWerner Bode, Peter Franz
Life of this patent
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Abstract
A commutator for electric machines has a multiplicity of segments (2), which are provided with anchoring means (5) for securing in the insulating body (13), are joined at one end with associated winding ends (8) of a rotor, and are divided from one another in the circumferential direction by slots (10) which are filled with insulating material (15). The insulating material forming the insulating body (13) and filling the slots (10) as insulating lamellas (15) protrudes radially, in the form of widened supports (16), beyond the insulating lamellas (15). The supports (16) form the boundary in the circumferential direction for the terminal grooves (17) of the segments (2) for the rotor winding ends (8), which are welded to the segments (2).
Claims13
A commutator for an electrical machine equipped with a rotor defining a rotational axis, the rotor being provided with electrical winding means having a plurality of winding ends, the commutator defining a longitudinal axis coincident with said rotational axis and having respective longitudinal commutator ends, the commutator comprising:
- a plurality of segments defining a peripheral running surface surrounding said longitudinal axis;
- said segments being disposed in spaced relationship one next to the other so as to cause said segments to conjointly define a plurality of slits;
- each one of said segments having a seat formed thereon so as to extend over the entire lateral width of said segment, said seat being disposed at one of said commutator ends for receiving selected ones of said winding ends thereon;
- an insulating body for accommodating said segments therein and including a first portion filling said slits and a second portion extending radially beyond said running surface at said one commutator end in a non-overlapping relationship to said segments to define a plurality of radially outwardly extending supports one adjacent the other;
- each two mutually adjacent ones of said supports projecting outwardly beyond a corresponding one of the seats of said segments to conjointly define a gap above the seat corresponding to said width of said segment for accommodating selected ones of said winding ends therein;
- said selected ones of said winding ends being electrically and mechanically connected to the seat of the segment corresponding to said gap;
- and,
- anchoring means on said segments for anchoring the same in said insulating body.
Dependencies are inferred from the claim text.