Current transfer device for a rotor of an electric machine
AssigneeSchaeffler Technologies AG & Co. KG
InventorDavid Lang
Life of this patent
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Abstract
A current transfer device for a rotor of an electric machine includes a first annular disc made of sheet metal. Electrical contacts are located on the first annular disc, within guides and are biased by spring elements. A receiving socket is formed monolithically with the first annular disc and extends radially outward therefrom. The receiving socket includes a first tab-like portion and a second tab-like portion that is bent in such a way that the first tab-like portion rests thereon.
Claims20
A current transfer device for a rotor of an electric machine, comprising:
- a first annular disc made of sheet metal and configured to extend circumferentially about a rotor shaft of the rotor in a non-rotatable manner;
- at least one electrical contact arranged on the first annular disc, which is subjected to a spring force in a radial direction by a spring element and is linearly displaceably guided in the direction of the rotor shaft by a guide, wherein the electrical contact is configured to electrically conductively contact at least one circumferentially extending conducting path of the rotor shaft;
- and
- at least one first receiving socket that extends radially outward from a portion of the first annular disc, wherein the at least one first receiving socket is formed monolithically with the first annular disc and includes a first tab-like portion and a second tab-like portion that is bent such that the first tab-like portion rests thereon, and wherein at least one of the first and second tab-like portions has a cylinder ring protruding therefrom.
A current transfer device for a rotor of an electric machine, the rotor having a rotor shaft provided with at least one circumferentially extending conducting path, the device comprising:
- a first annular disc formed of sheet metal and configured to circumferentially extend about and be non-rotatably fixed to the rotor shaft;
- a plurality of guides formed monolithically with the first annular disc;
- a plurality of electrical contacts, each disposed in a respective one of the guides and biased radially inward toward the conducting path by a spring element such that each electrical contact is linearly displaceable along a radial direction to maintain sliding electrical engagement with the conducting path;
- a receiving socket integrally formed with and extending radially outward from the first annular disc, the receiving socket being formed by a first tab-like portion and a second tab-like portion that is bent toward the first tab-like portion such that the first tab-like portion overlies the second tab-like portion;
- and
- a cylinder ring projecting axially from at least one of the first and second tab-like portions, the cylinder ring defining a threaded aperture that is configured to receive a fastener for mechanically and electrically coupling an electrical conductor to the receiving socket.
An electric machine, comprising:
- a rotor having a rotor shaft;
- and
- a current transfer device, comprising:
- a first annular disc formed of sheet metal and extending circumferentially about the rotor shaft in a non-rotatable manner relative to the rotor shaft;
- a plurality of guides formed of the sheet metal monolithically with the first annular disc;
- a plurality of electrical contacts, each disposed in a respective one of the guides and biased radially inward toward the rotor shaft by a spring element such that each electrical contact is linearly displaceable along a radial direction to maintain electrical engagement with a conducting path of the rotor shaft;
- and
- a receiving socket formed of the sheet metal monolithically with the first annular disc and extending radially outward therefrom, the receiving socket including a first portion and a second portion that is bent toward the first portion such that the first portion overlies the second portion.
Dependencies are inferred from the claim text.