Rotor for motor and motor comprising same
AssigneeHyundai Kefico Corporation
InventorAhn Hee Lee
Life of this patent
Estimating the term…
Abstract
A rotor for a motor is proposed, the rotor including: a magnet coupled to a shaft to surround an outer surface of the shaft and having opposite-polar magnetic portions circumferentially alternately arranged; a first fixed ring fixed to the shaft to surround an outer surface of the shaft, disposed in contact with an upper portion of the magnet, and having a first coupling portion at a lower end being in contact with a top of the magnet to prevent rotation relative to the magnet; and a second fixed ring fixed to the shaft to surround the outer surface of the shaft, disposed in contact with a lower portion of the magnet, and having a second coupling portion at an upper end being in contact with a bottom of the magnet to prevent rotation relative to the magnet.
Claims13
A rotor for a motor, comprising:
- a magnet coupled to a shaft to surround an outer surface of the shaft and having opposite-polar magnetic portions circumferentially alternately arranged;
- a first fixed ring fixed to the shaft to surround an outer surface of the shaft, disposed in contact with an upper portion of the magnet, and having a first coupling portion at a lower end being in contact with a top of the magnet to prevent rotation relative to the magnet;
- and
- a second fixed ring fixed to the shaft to surround the outer surface of the shaft, disposed in contact with a lower portion of the magnet, and having a second coupling portion at an upper end being in contact with a bottom of the magnet to prevent rotation relative to the magnet,
- wherein a protrusion protruding from the first fixed ring or the second fixed ring and a support recessed inside the first fixed ring or the second fixed ring are alternately disposed at each of the first coupling portion and the second coupling portion,
- the protrusion of the first coupling portion is positioned to circumferentially correspond to the support of the second coupling portion, and
- the support of the first coupling portion is positioned to circumferentially correspond to the protrusion of the second coupling portion.
A rotor for a motor, comprising:
- a magnet coupled to a shaft to surround an outer surface of the shaft and having opposite-polar magnetic portions circumferentially alternately arranged;
- a first fixed ring fixed to the shaft to surround an outer surface of the shaft, disposed in contact with an upper portion of the magnet, and having a first coupling portion at a lower end being in contact with a top of the magnet to prevent rotation relative to the magnet;
- and
- a second fixed ring fixed to the shaft to surround the outer surface of the shaft, disposed in contact with a lower portion of the magnet, and having a second coupling portion at an upper end being in contact with a bottom of the magnet to prevent rotation relative to the magnet,
- wherein the first coupling portion or the second coupling portion is formed by connecting a plurality of spaced protrusions protruding toward the magnet or a plurality of supports recessed inside the first fixed ring or the second fixed ring.
Dependencies are inferred from the claim text.