Rotor assembly, motor and dual clutch transmission
First Claim
1. A rotor comprising:
- a shaft;
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 magnet and 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 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,wherein the core member includes a plurality of second recesses disposed on the upper surface of the core member, the second recesses and the first recesses being disposed to be misaligned in a radial direction,wherein a shortest distance between the shaft and one of the second recesses is less than a shortest distance between the shaft and one of the first recesses in the radial direction, andwherein a shortest distance in a radial direction between the shaft and an outer end of the upper surface of the core member is greater than the shortest distance in a radial direction between the shaft and the one of the first recesses on the upper surface of the ring magnet.
1 Assignment
0 Petitions
Accused Products
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.
18 Citations
20 Claims
-
1. A rotor comprising:
-
a shaft; 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 magnet and 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 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, wherein the core member includes a plurality of second recesses disposed on the upper surface of the core member, the second recesses and the first recesses being disposed to be misaligned in a radial direction, wherein a shortest distance between the shaft and one of the second recesses is less than a shortest distance between the shaft and one of the first recesses in the radial direction, and wherein a shortest distance in a radial direction between the shaft and an outer end of the upper surface of the core member is greater than the shortest distance in a radial direction between the shaft and the one of the first recesses on the upper surface of the ring magnet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
-
15. A motor comprising:
-
a rotor; and a stator, wherein the rotor comprises; a shaft; 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 magnet and 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 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, wherein the core member includes a plurality of second recesses disposed on the upper surface of the core member, the second recesses and the first recesses being disposed to be misaligned in a radial direction, wherein a shortest distance between the shaft and one of the second recesses is less than a radially shortest distance between the shaft and one of the first recesses in the radial direction, and wherein a shortest distance in a radial direction between the shaft and an outer end of the upper surface of the core member is greater than the shortest distance in a radial direction between the shaft and the one of the first recesses on the upper surface of the ring magnet. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification