Motor assembly

Patent metadata

Field	Value
Publication number	US-2017194833-A1
Application number	US-201515316404-A
Country	US
Kind code	A1
Filing date	Mar 30, 2015
Priority date	Jun 5, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

A motor assembly of the present disclosure improves a combined structure between an impeller and a rotor to more firmly combine them. Furthermore, the impeller is combined with a rotor shaft without deformation, so the durability of the respective components may be improved.

First claim

1 . A motor assembly comprising:
a stator; a rotor having a rotor shaft and electromagnetically interacting with the stator to be rotated; and an impeller combined with the rotor shaft, wherein the impeller comprises an impeller body; a plurality of wings formed on the outer face of the impeller body for producing air currents by rotation; and a shaft combiner having a shaft insertion hole through which the rotor shaft is inserted, arranged on the impeller body, and formed for the rotor shaft to be pressed in to enable the impeller and the rotor shaft to operate as one body.

2 . The motor assembly of claim 1 ,
wherein the shaft combiner comprises a shaft combining plane in which the rotor shaft is pressed; and a gradient combining plane extending from the shaft combining plane, and formed to be gradient to have an inner diameter gradually increase in an inserted direction of the rotor shaft.

3 . The motor assembly of claim 2 ,
wherein the outer circumferential face of the rotor shaft and the gradient combining plane are adhered to each other by an adhesive.

4 . The motor assembly of claim 1 ,
wherein the shaft combiner comprises an anti-deformation unit partially arranged from an end of the shaft combiner and insert-injected with the impeller to prevent deformation of the shaft combiner in combination of the rotor shaft.

5 . The motor assembly of claim 1 ,
wherein the shaft combiner comprises an anti-deformation unit arranged on the entire area of the shaft combiner and insert-injected with the impeller to prevent deformation of the shaft combiner in combination of the rotor shaft.

6 . The motor assembly of claim 4 ,
wherein the anti-deformation unit comprises an anti-deformation gradient plane formed in at least a part of the anti-deformation unit and formed to be gradient to have an inner diameter gradually increase in an inserted direction of the rotor shaft.

7 . The motor assembly of claim 2 , wherein the rotor shaft comprises
an anti-slip part formed on the outer circumferential face of the rotor shaft to correspond to the shaft combining plane, and having a knurling form.

8 . The motor assembly of claim 1 , wherein the rotor shaft comprises
a screw projection formed at an end in an inserted direction to the impeller and having a screw thread formed on the outer circumferential face, wherein the shaft combiner comprises a screw groove corresponding to the screw projection.

9 . The motor assembly of claim 8 ,
wherein the screw groove is formed to be stepped to have an inner diameter smaller than the inner circumferential face of the adjacent shaft combiner, and wherein the screw projection is formed to be stepped to have an outer diameter smaller than the outer circumferential face of the adjacent rotor shaft, thereby being combined with the screw groove.

10 . The motor assembly of claim 1 , wherein the rotor shaft comprises
a screw projection formed at an end in an inserted direction to the impeller and having a screw thread formed on the outer circumferential face, wherein the shaft combiner comprises a nut unit insert-injected to the impeller and formed for the screw projection to be combined with.

11 . A motor assembly comprising:
a stator; a rotor having a rotor shaft and electromagnetically interacting with the stator to be rotated; and an impeller combined with the rotor shaft, wherein the rotor shaft comprises a first shaft; and a second shaft formed to extend in the same elongate direction as the first shaft and having a smaller diameter than the first shaft, wherein the impeller comprises, an impeller body; a plurality of wings formed on the outer circumferential face of the impeller body for producing air currents by rotation; and a shaft combiner having a first shaft combiner in which the first shaft is settled and a second shaft combiner in which the second shaft is settled, and formed on the impeller body to be combined with the rotor shaft.

12 . The motor assembly of claim 11 , wherein the shaft combiner comprises
a shaft cover arranged at an end of the second shaft combiner to release inside air when the rotor shaft is pressed in the shaft combiner, and formed to have a discharging hole to link internal space formed when the rotor shaft is combined with the impeller to outer space of the impeller, and to block an end of the rotor shaft.

13 . A motor assembly comprising:
a stator; a rotor having a rotor shaft and electromagnetically interacting with the stator to be rotated; and an impeller having an impeller body, a plurality of wings formed on the outer face of the impeller body for producing air currents, and a shaft combiner arranged on the impeller body for the rotor shaft to be combined with, and insert-injected with the rotor shaft, wherein the rotor shaft comprises a plurality of anti-slip grooves formed to correspond to the shaft combiner, and having grooves formed along a direction of a rotation shaft at regular intervals in a circumferential direction.

14 . The motor assembly of claim 13 , wherein the impeller is configured to
have an adhesive applied into the plurality of anti-slip grooves and be insert-injected with the rotor shaft.

15 . The motor assembly of claim 13 , wherein the rotor shaft comprises
an anti-leakage flange formed at an end of the rotor shaft to be adjacent to the plurality of anti-slip grooves for preventing an adhesive applied onto the plurality of anti-slip grooves from leaking out.

16 . The motor assembly of claim 15 ,
wherein the anti-leakage flange comprises an anti-leakage groove formed to be sunken along the circumference of the rotor shaft on the inside of the anti-leakage flange to contain an adhesive leaking out.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Bang Myung Bae
• Park Jong Jin
• In Byung Ryel

Classifications

• F04D25/0606

  the electric motor being specially adapted for integration in the pump · CPC title

• F04D29/263

  mounting fan or blower rotors on shafts · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• H02K7/14 Primary

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title