Abstract Structure for supporting on the rotor shaft of a dynamo-electric machine a commutator composed of a cylindric assembly of commutator bars includes first and second shrink collars shrunk into place in annular recesses provided respectively at opposite ends of the commutator, and a third shrink collar integral with the second collar and inter-connected with the latter by means of a thin-walled tubular part which is elastic in the radial direction. The commutator is secured to the rotor shaft by means including the third shrink collar, and the thin-walled interconnecting part which together with the second and third shrink collars is fabricated from a single piece of metallic material, due to its radially elastic characteristic serves to accommodate a change in diameter of the first and second shrink collars caused by heating and expansion of the commutator without affecting the diameter of the third shrink collar. The commutator is also free to expand axially in the direction of the first shrink collar by virtue of non-attachment to the rotor shaft.
Inventors
👤 W Heil
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-01 07:06
CPC Classifications
H; H02; H02K; H02K13/00; H02K13/006
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
192 words
Structure for supporting on the rotor shaft of a dynamoelectric machine a commutator composed of a cYlindric assembly of commutator bars which comprises a first shrink collar inserted into an annular recess provided at one end of said commutator and shrunk into place, a second shrink collar inserted into an annular recess provided at the opposite end of said commutator and shrunk into place, a third shrink collar integral with said second collar and inter-connected therewith by means of a thinwalled tubular part and which is elastic in the radial direction, and means including said third shrink collar for securing said commutator to said rotor shaft, said second and third shrink collars and said thin-walled inter-connecting part therebetween being constituted by a single piece of metallic material, and said radially elastic characteristic of said thin-walled interconnecting part serving to accommodate a change in diameter of said first and second shrink collars caused by heating and expansion of said commutator without affecting the diameter of said third shrink collar, said commutator also being free to expand axially in the direction of said first shrink collar by virtue of non-attachment to said rotor shaft.
Claim 2
Dependent Claim
192 words
Structure for supporting on the rotor shaft of a dynamoelectric machine a commutator composed of a cYlindric assembly of commutator bars which comprises a first shrink collar inserted into an annular recess provided at one end of said commutator and shrunk into place, a second shrink collar inserted into an annular recess provided at the opposite end of said commutator and shrunk into place, a third shrink collar integral with said second collar and inter-connected therewith by means of a thinwalled tubular part and which is elastic in the radial direction, and means including said third shrink collar for securing said commutator to said rotor shaft, said second and third shrink collars and said thin-walled inter-connecting part therebetween being constituted by a single piece of metallic material, and said radially elastic characteristic of said thin-walled interconnecting part serving to accommodate a change in diameter of said first and second shrink collars caused by heating and expansion of said commutator without affecting the diameter of said third shrink collar, said commutator also being free to expand axially in the direction of said first shrink collar by virtue of non-attachment to said rotor shaft.
Claim 3
Dependent Claim
30 words
Structure as defined in claim 1 for supporting a commutator on the rotor shaft of a dynamo-electric machine wherein said third shrink collar is secured indirectly to said rotor shaft.
Claim 4
Dependent Claim
30 words
Structure as defined in claim 1 for supporting a commutator on the rotor shaft of a dynamo-electric machine wherein said third shrink collar is secured directly to said rotor shaft.
Claim 5
Dependent Claim
53 words
Structure as defined in claim 1 for supporting a commutator on the rotor shaft of a dynamo-electric machine wherein said second and third shrink collars are located concentrically but at different radial distances from the rotor shaft and wherein said tubular inter-connecting part therebetween has a meandering configuration as viewed in longitudinal section.