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US RE49,924 E1Granted
Rotor assembly, motor and dual clutch transmission
AssigneeLG Innotek Co., Ltd.
InventorIl Sik Won
Life of this patent
Estimating the term…
Abstract
The present invention discloses a motor comprising: a stator part; and a rotor assembly rotatably disposed with respect to the stator part, wherein the rotor assembly comprises: a ring magnet including an insertion hole with a shaft disposed therein and a plurality of first grooves formed at one side thereof along a first imaginary circle; and a core member including a body portion disposed between the shaft and the insertion hole, and an extension portion covering the plurality of first grooves, wherein the extension portion comprises a plurality of second grooves deviated from a plurality of first imaginary straight lines which pass from a center of the first imaginary circle respectively through the plurality of first grooves.
Claims20
A rotor comprising:
- a shaft that extends in an axial direction from a lower end to an upper end;
- a ring magnet including a first hole into which the shaft is inserted, the ring magnet having an upper surface;
- and
- a core member disposed between the shaft and the ring magnetand including a resin material, and a part of the core member is on the upper surface of the ring magnet,
- wherein the ring magnet includes a plurality of first recesses disposed on are formed in the ring magnet and open to the upper surface of the ring magnet,
- wherein an upper surface of the core member is disposed on the upper surface of the ring magnet such that the upper surface of the core member is spaced apart in the axial direction from the upper surface of the ring magnet in a direction parallel to the axial direction,
- wherein the core member includes a plurality of second recesses disposed on are formed in the core member and open to the upper surface of the core member, the second recesses and the first recesses being disposed to be misaligned in a radial direction,
- wherein the plurality of first recesses are located along specific radial directions extending outward from the shaft, the plurality of second recesses are located along specific radial directions extending outward from the shaft, and the specific radial directions along which the second recesses are located differ from the specific radial directions along which the first recesses are located, and
- wherein a shortest distance between the shaft and one each of the second recesses in respective radial directions extending outward from the shaft is less than a shortest distance between the shaft and one each of the first recesses in the respective radial direction directions extending outward from the shaft, and
- wherein a shortest distance in a radial direction between the shaft and an outer end circumferential edge of the upper surface of the core member is greater than the shortest distance in a radial direction between the shaft and the one each of the first recesses on the upper surface of the ring magnet in the respective radial directions extending outward from the shaft, and
- wherein all of the plurality of second recesses are disposed on a same circumference about the shaft, and an outer boundary of each of the second recesses is substantially cylindrical,
- wherein all of the plurality of second recesses disposed on the same circumference are misaligned with respect to the ring magnet in any direction parallel to the axial direction such that no overlap exists, in any direction parallel to the axial direction, between any of the second recesses and the ring magnet.
9 more elements
A motor comprising:
- a rotor;
- and
- a stator,
- wherein the rotor comprises;:
- a shaft that extends in an axial direction from a lower end to an upper end;
- a ring magnet including a first hole into which the shaft is inserted, the ring magnet having an upper surface;
- and
- a core member disposed between the shaft and the ring magnetand including a resin material, and a part of the core member is on the upper surface of the ring magnet,
- wherein the ring magnet includes a plurality of first recesses disposed on an are formed in the ring magnet and open to the upper surface of the ring magnet,
- wherein an upper surface of the core member is disposed on the upper surface of the ring magnet such that the upper surface of the core member is spaced apart in the axial direction from the upper surface of the ring magnet in a direction parallel to the axial direction,
- wherein the core member includes a plurality of second recesses disposed on are formed in the core member and open to the upper surface of the core member, the second recesses and the first recesses being disposed to be misaligned in a radial direction,
- wherein the plurality of first recesses are located along specific radial directions extending outward from the shaft, the plurality of second recesses are located along specific radial directions extending outward from the shaft, and the specific radial directions along which the second recesses are located differ from the specific radial directions along which the first recesses are located, and
- wherein a shortest distance between the shaft and one each of the second recesses in respective radial directions extending outward from the shaft is less than a radially shortest distance between the shaft and one each of the first recesses in the respective radial direction directions extending outward from the shaft, and
- wherein a shortest distance in a radial direction between the shaft and an outer end circumferential edge of the upper surface of the core member is greater than the shortest distance in a radial direction between the shaft and the one each of the first recesses on the upper surface of the ring magnet in the respective radial directions extending outward from the shaft, and
- wherein all of the plurality of second recesses are disposed on a same circumference about the shaft, and an outer boundary of each of the second recesses is substantially cylindrical, and
- wherein all of the plurality of second recesses disposed on the same circumference are misaligned with respect to the ring magnet in any direction parallel to the axial direction such that no overlap exists, in any direction parallel to the axial direction, between any of the second recesses and the ring magnet.
13 more elements
Dependencies are inferred from the claim text.