Motor with stepped rotor tube coupled to the inner race of a multiple-row bearing
AssigneeLG Innotek Co., Ltd.
InventorsKyung Sang Park, Seong Jin Kim, Jin Ho Kim, Chang Hyun Park, Woo Seob Shim
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Abstract
A motor includes a stator, a rotor tube which is disposed inside the stator, a rotor core assembly which is coupled to an outer circumferential surface of the rotor tube, and a shaft which is coupled in the rotor tube. The rotor tube is divided into at least two stepped regions having different diameters. A multiple-row bearing has an inner wheel coupled to an outer circumferential surface of any one of the at least two stepped regions, and rotatably supports the rotor tube. Such a configuration ensures structural stability of the motor and minimizes a space occupied by a bearing.
Claims4
A motor comprising:
- a stator;
- a rotor tube which is disposed inside the stator;
- a rotor core assembly which is coupled to an outer circumferential surface of the rotor tube;
- and
- a shaft which is coupled in the rotor tube,
- wherein the rotor tube is divided into at least two stepped regions having different diameters, and includes a multiple-row bearing which has an inner wheel coupled to an outer circumferential surface of any one of the at least two stepped regions, and rotatably supports the rotor tube,
- wherein diameters of the at least two stepped regions are decreased in a stepwise manner toward a lower end thereof,
- wherein the inner wheel of the multiple-row bearing is coupled to an outer circumferential surface of a lower stepped region of the stepped regions, and
- wherein an upper surface of the inner wheel of the multiple-row bearing supports a stepped portion of the lower stepped region.
A motor comprising:
- a stator;
- a rotor tube which is disposed inside the stator;
- a rotor core assembly which is coupled to an outer circumferential surface of the rotor tube;
- and
- a shaft which is coupled in the rotor tube,
- wherein the rotor tube is divided into at least two stepped regions having different diameters, and includes a multiple-row bearing which has an inner wheel coupled to an outer circumferential surface of any one of the at least two stepped regions, and rotatably supports the rotor tube, and
- wherein the shaft includes a first cut-out portion which is formed by being cut out inward in a radial direction, the rotor tube includes a second cut-out portion which is formed by being cut out inward in a radial direction so as to correspond to the first cut-out portion, and the motor further includes a bracket which has a slot into which the first cut-out portion and the second cut-out portion, which are aligned, are fitted.
Dependencies are inferred from the claim text.