WO2023075018A1 - 모터 - Google Patents
모터 Download PDFInfo
- Publication number
- WO2023075018A1 WO2023075018A1 PCT/KR2021/019179 KR2021019179W WO2023075018A1 WO 2023075018 A1 WO2023075018 A1 WO 2023075018A1 KR 2021019179 W KR2021019179 W KR 2021019179W WO 2023075018 A1 WO2023075018 A1 WO 2023075018A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- groove
- impeller
- stator
- housing
- motor
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims abstract description 47
- 238000010168 coupling process Methods 0.000 claims abstract description 47
- 238000005859 coupling reaction Methods 0.000 claims abstract description 47
- 239000012212 insulator Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 230000004323 axial length Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/003—Couplings; Details of shafts
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
- H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Definitions
- This specification relates to motors. More specifically, it relates to a motor for a vacuum cleaner.
- a vacuum cleaner is a home appliance that sucks foreign substances such as dust and collects them in a separate dust collection unit installed inside the main body.
- a vacuum cleaner requires high suction power to effectively suck foreign substances, and the strength of the suction force can be said to be proportional to the rotational force of the motor. That is, the higher the rotational force of the motor, the higher the rotational speed of the fan connected to the motor, and thus the higher the suction force of foreign substances.
- the impeller in order to be applied to a complex shape, is generally formed of a high-strength plastic material. In this case, the impeller is deformed, and a collision occurs between the impeller and the impeller cover, or wear occurs due to contact between the impeller and the impeller cover. If the air gap between the impeller blade and the impeller cover is large to prevent collision between the impeller and the impeller cover, or the air gap between the impeller blade and the inner surface of the impeller cover becomes large due to abrasion of the impeller blade , there was a problem that the efficiency of the motor was lowered.
- An object to be solved by the present specification is to provide a motor capable of preventing contact between impeller blades and an impeller cover by minimizing deformation of the impeller.
- the problem to be solved by the present specification is to provide a motor capable of improving efficiency by minimizing an air gap between the blades of the impeller and the inner surface of the impeller cover.
- the problem to be solved by the present specification is to provide a motor capable of reducing the manufacturing cost of a product without adding a separate configuration.
- the problem to be solved by the present specification is to provide a motor capable of reducing material costs and reducing manufacturing processes.
- a motor for achieving the above object includes a housing, a bearing disposed in the housing, a rotating shaft rotatably coupled to the bearing, and an impeller cover disposed on an upper portion of the housing. And, an impeller disposed inside the impeller cover and coupled to the rotating shaft, a magnet coupled to the lower region of the rotating shaft, a stator coupled to the housing and facing the magnet, and a coil wound around the stator.
- the impeller includes a body, a plurality of blades formed on an outer circumferential surface of the body, a plurality of grooves formed concave upward from the lower surface of the body, and formed in the central region of the body and the rotation shaft is disposed It may contain coupling holes.
- material cost can be reduced through a plurality of grooves.
- the manufacturing process can be reduced by reducing the cooling time due to excessive thickness through the plurality of grooves, and product deformation such as sink marks due to shrinkage occurring during cooling can be reduced.
- the plurality of grooves may be spaced apart from each other in a radial direction.
- each of the plurality of grooves may extend in a circumferential direction.
- the outer circumferential surface and the inner circumferential surface of each of the plurality of grooves may be formed in a circular shape.
- the plurality of grooves may include a first groove extending in a circumferential direction, and a second groove disposed inside the first groove and extending in a circumferential direction.
- the axial height of the first groove may be smaller than the axial height of the second groove.
- it may include a first stepped portion connecting the inner end of the first groove and the outer end of the second groove and disposed above the lower surface of the body.
- a second stepped portion connecting the inner end of the second groove and the coupling hole and disposed above the lower surface of the body may be included.
- the second stepped portion may be disposed above the first stepped portion.
- a radial length between the first groove and the second groove may be greater than a radial length between the first groove and the outer circumferential surface of the body.
- a radial length between the first groove and the second groove may be greater than a radial length between the second groove and the coupling hole.
- an inner surface of the second groove may have a constant radius of curvature.
- the radius of curvature of an outer region in the radial direction of the inner surface of the first groove may be greater than the radius of curvature of the remaining regions.
- the plurality of grooves may have concentricity.
- the axial height of the plurality of grooves may be 0.1 times or more and 0.8 times or less of the axial height of the body of the impeller.
- FIG. 1 is a perspective view of a motor according to an embodiment of the present specification.
- FIG. 2 is an exploded perspective view of a motor according to an embodiment of the present specification.
- FIG 3 is a cross-sectional view of a motor according to an embodiment of the present specification.
- FIG. 4 is an enlarged view of part A of FIG. 3 .
- FIG. 5 is an enlarged view of part B of FIG. 3 .
- FIG. 6 is a perspective view of a housing and a stator of a motor according to an embodiment of the present specification.
- FIG. 7 is a perspective view of a stator of a motor according to an embodiment of the present specification.
- FIG 8 and 9 are perspective views of a partial configuration of an impeller cover and a housing according to an embodiment of the present specification.
- FIG. 10 is a perspective view of some components of an impeller cover according to an embodiment of the present specification.
- 11 and 12 are perspective views of a housing according to an embodiment of the present specification.
- FIG 13 and 14 are perspective views of an impeller according to an embodiment of the present specification.
- 15 to 17 are cross-sectional views of impellers according to embodiments of the present specification.
- FIG. 1 is a perspective view of a motor according to an embodiment of the present specification.
- 2 is an exploded perspective view of a motor according to an embodiment of the present specification.
- 3 is a cross-sectional view of a motor according to an embodiment of the present specification.
- 4 is an enlarged view of part A of FIG. 3 .
- 5 is an enlarged view of part B of FIG. 3 .
- 6 is a perspective view of a housing and a stator of a motor according to an embodiment of the present specification.
- 7 is a perspective view of a stator of a motor according to an embodiment of the present specification.
- 8 and 9 are perspective views of a partial configuration of an impeller cover and a housing according to an embodiment of the present specification.
- 10 is a perspective view of some components of an impeller cover according to an embodiment of the present specification.
- 11 and 12 are perspective views of a housing according to an embodiment of the present specification.
- the motor 10 includes a housing 100, a bearing 200, a rotating shaft 300, an impeller cover 400, and an impeller 500. ), a magnet 600, a stator 700, an insulator 800, a coil 900, a control unit 1000, and a coupling member 1100, but some of these configurations It may be implemented except for, and does not exclude additional configurations other than that.
- the motor 10 according to one embodiment of the present specification is described taking a motor used in a vacuum cleaner as an example, but is not limited thereto and may be applied to various devices.
- an axial direction may refer to a vertical direction with reference to FIG. 3
- a radial direction may refer to a horizontal direction with reference to FIG. 3 .
- the housing 100 may be coupled to the impeller cover 400 .
- An upper surface of the housing 100 may be coupled to the second impeller cover 420 of the impeller cover 400 .
- the housing 100 may be disposed inside the second impeller cover 420 .
- a stator 700 may be coupled to the housing 100 .
- a stator 700 may be coupled to the inside of the housing 100 .
- a bearing 200 may be coupled to the housing 100 .
- a bearing 200 may be coupled to the inside of the housing 100 .
- the housing 100 may be spaced apart from the impeller 500 in an axial direction.
- a bearing 200, a rotating shaft 300, a magnet 600, a stator 700, an insulator 800, and a coil 900 may be disposed in the housing 100.
- the housing 100 may include a flange portion 110, a coupling portion 120, a bearing hole 130, a bearing protrusion 140, a plurality of extension portions 150, and a stator groove 160.
- the flange portion 110 may extend in a radial direction.
- An upper surface of the flange portion 110 may be coupled to the impeller cover 400 .
- An upper surface of the flange portion 110 may be bolted to a lower surface of the second impeller cover 420 .
- An upper surface of the flange portion 110 may be formed with a fastening groove 112 for bolting to the lower surface of the second impeller cover 420 .
- the fastening groove 112 of the flange portion 110 may overlap the fastening hole 424 of the second impeller cover 420 in the axial direction.
- At least a portion of an outer surface of the flange portion 110 in the radial direction may contact an inner surface of the impeller cover 400 .
- At least a portion of an outer surface of the flange portion 110 in the radial direction may contact an inner surface of the second impeller cover 420 .
- a coupling part 120 may be formed inside the flange part 110 .
- the coupling part 120 may be formed in the central area of the flange part 110 .
- the coupling part 120 may extend upward or downward in the axial direction from an inner area in the radial direction of the flange part 110 .
- Coupling part 120 may be formed in a cylindrical shape.
- the bearing 200 may be coupled to the coupling part 120 .
- the length or height of the coupling part 120 in the axial direction may be greater than the length or height of the flange part 110 in the axial direction. Through this, the coupling part 120 can stably support the bearing 200 .
- An outer circumferential surface or an outer surface of the upper end of the coupling part 120 may contact the impeller cover 400 .
- the outer circumferential surface or outer surface of the upper region of the coupling part 120 may contact the inner surface or inner circumferential surface 422 of the second impeller cover 420 . Through this, the coupling position of the impeller cover 400 to the housing 100 can be guided.
- the bearing hole 130 may be formed in a central region of the coupling part 120 .
- the bearing hole 130 may extend in an axial direction.
- a bearing 200 may be disposed in the bearing hole 130 .
- the axial length or height of the bearing hole 130 may correspond to the axial length or height of the bearing 200 .
- the bearing protrusion 140 may extend inwardly from the coupling part 120 .
- the bearing protrusion 140 may extend radially inward from the lower end of the coupling part 120 .
- the bearing protrusion 140 may support the lower end 202 of the bearing 200 in the axial direction.
- the magnet 600 may be supported in the axial direction by electronic interaction with the stator 700 and/or the coil 900, and the bearing 200 coupled to the rotating shaft 300 coupled to the magnet 600 Since the lower end 202 in the axial direction is supported by the bearing protrusion 140, it is possible to prevent the bearing 200 from being separated from the housing 100 or moving in the axial direction.
- the bearing protrusion 140 has been described as an example only extending inward in the radial direction from the lower end of the coupling part 120 to avoid interference with the impeller 500 and to facilitate coupling between components.
- both the upper end 204 and the lower end 202 of the bearing 200 may be supported in the axial direction by extending radially inward from the upper end and lower end of the coupling part 120 .
- the plurality of extension parts 150 may extend downward from the flange part 110 .
- the plurality of extension parts 150 may extend downward from an outer area in the radial direction of the flange part 110 .
- the stator 700 may be coupled to the plurality of extension parts 150 .
- a stator groove 160 to which the stator 700 is coupled may be formed in a lower region of the plurality of extension parts 150 .
- An outermost surface of the plurality of extension parts 150 may be disposed radially outside the outer surface of the flange part 110 . Through this, space efficiency can be improved.
- the plurality of extensions 150 are three as an example, but are not limited thereto and the number of at least one extension part 150 may be variously changed.
- Inner surfaces of the plurality of extension parts 150 may include curved parts 152 .
- the curved portion 152 may be connected to the flange portion 110 .
- a radial radius of the curved portion 152 may increase toward a lower portion. Through this, space efficiency can be improved.
- the curved portion 152 may overlap the bearing 300 in a radial direction.
- the curved portion 152 may not overlap the magnet 600 , the stator 700 , the insulator 800 , and the coil 900 in a radial direction.
- the curved portion 152 may overlap a lower area of the second impeller cover 420 in a radial direction.
- Inner surfaces of the plurality of extension parts 150 may include straight parts 154 .
- the straight portion 154 may extend downward in the axial direction from the curved portion 152 .
- the radius of the straight portion 154 may be constant in the axial direction.
- the straight portion 154 may overlap the magnet 600 , the stator 700 , the yoke 800 , and the coil 900 in a radial direction.
- a stator groove 160 may be formed in the straight portion 154 .
- the stator groove 160 may be concavely formed radially outward from the inner surface of the housing 100 .
- the stator groove 160 may be formed in a lower region of the plurality of extension parts 150 .
- the stator groove 160 may be formed in the straight portion 154 .
- the stator 700 may be coupled to the stator groove 160 .
- the stator core 710 of the stator 700 may be press-fitted to the stator groove 160 .
- the stator groove 160 extends from the bottom surface 1602 recessed radially outward from the inner surface of the plurality of extension parts 150 and the inner surface of the plurality of extension parts 150 from the upper end of the bottom surface 1602. and the upper contact surface 1604 in contact with the upper surface 702 of the stator 700, and the lower surface 704 of the stator 700 extending from the bottom of the bottom surface 1602 to the inner surface of the plurality of extensions 150 It may include a lower contact surface 1606 in contact with.
- the radial length of the lower contact surface 1606 of the stator groove 160 may be smaller than the radial length of the upper contact surface 1604 .
- the outer circumferential surface of the stator 700 may be coupled to the bottom surface 1602 of the stator groove 160 by shrink fit.
- the plurality of extensions 150 are deformed outward in the radial direction due to thermal expansion. this will happen
- the housing groove 712 of the stator 700 passes through the inner surface 1562 of the lower end 156 of the plurality of extension parts 150 .
- the amount of deformation of the inner surface of the plurality of extension parts 150 is sufficient for the housing groove 712 of the stator 700 to pass through the inner surface 1562 of the lower end 156 of the plurality of extension parts 150. Should be.
- the radial length of the lower contact surface 1606 of the stator groove 160 is preferably smaller than the radial length of the upper contact surface 1604. Then, when the heat is cooled, the bottom surface 1602 of the stator groove 160 and the bottom surface 7122 of the housing groove 712 may be press-fitted to each other.
- the axial length or height of the stator groove 160 may be smaller than the axial length or height of the stator 700 .
- the plurality of extension parts 150 may be coupled to the housing groove 712 of the stator 700 .
- the length of the plurality of extension parts 150 in the circumferential direction may be smaller than the length of the housing groove 712 of the stator 700 in the circumferential direction.
- a straight line L extending vertically from the inner surface 1562 of the lower end 156 of the plurality of extension parts 150 is disposed between the bottom surface 1602 of the stator groove 160 and the straight part 154. It can be.
- a lower region of the plurality of extension parts 150 where the stator groove 160 is formed may be formed in a 'c' shape. Through this, space efficiency can be improved.
- the outer surfaces of the plurality of extension parts 150 include a first area 151 disposed radially outward toward the bottom, a second area 153 extending downward from the first area 151, and the It may include a third area 155 disposed inside the radial direction from the second area 153 toward the bottom.
- the vertical length of the second region 153 is longer than the vertical length of the third region 155, and the vertical length of the first region 151 is longer than the vertical length of the second region 153. It can be.
- the stator 170 may overlap the second and third regions 153 and 155 in the radial direction, and may not overlap the first region 151 in the radial direction. Through this, space efficiency can be improved.
- the efficiency of the motor 10 can be improved by reducing the occurrence of vibration and noise by maintaining a constant distance between the magnet 600 as a mover and the stator 700 as a stator.
- the amount of deformation can be minimized by fixing the stator 700, which is a stator, to the housing without a separate additional configuration, the number of parts can be reduced.
- the bearing 200 may be disposed inside the housing 100 .
- the bearing 200 may be coupled to the coupling part 120 of the housing 100 .
- the bearing 200 may be disposed in the bearing hole 130 of the housing 100 .
- the lower end 202 of the bearing 200 may be supported in the axial direction by the bearing protrusion 140 .
- the bearing 200 may be formed in a cylindrical shape.
- the rotation shaft 200 may be rotatably coupled to the bearing 200 .
- the rotating shaft 300 may be coupled to the bearing 200 .
- the rotating shaft 300 may be rotatably coupled to the bearing 200 .
- the rotating shaft 300 may extend in an axial direction.
- a magnet 600 may be coupled to the rotating shaft 300 .
- the rotating shaft 300 may be coupled with the impeller 500 .
- the rotating shaft 300 may rotate together with the magnet 600 to rotate the impeller 500 in one direction or another direction.
- the impeller cover 400 may be disposed above the housing 100 .
- the impeller cover 400 may be coupled to an upper surface of the flange portion 110 of the housing 100 .
- the impeller cover 100 may be bolted to the upper surface of the flange portion 100 of the housing 100 through a coupling member 1100 .
- An impeller 500 may be disposed inside the impeller cover 400 .
- An inner surface of the impeller cover 400 may be spaced apart from the impeller 500 in a radial direction.
- the impeller cover 400 may include a first impeller cover 410 .
- the first impeller cover 410 may be coupled to the second impeller cover 420 through a stepped portion.
- the stepped portion of the lower end of the first impeller cover 410 may be engaged with the stepped portion of the upper portion of the outer area in the radial direction of the second impeller cover 420 .
- An impeller 500 may be disposed inside the first impeller cover 410 .
- Blades of the impeller 500 may be disposed inside the first impeller cover 410 .
- the radius of the first impeller cover 410 may decrease toward the top in the axial direction.
- the first impeller cover 410 may be formed in a cone shape with an open central area.
- the impeller cover 400 may include a second impeller cover 420 .
- the second impeller cover 420 may be coupled to the first impeller cover 410 through a stepped portion.
- the stepped portion of the upper end of the outer area in the radial direction of the second impeller cover 420 may be engaged with the stepped portion of the lower portion of the first impeller cover 410 .
- the second impeller cover 420 may be bolted to the upper surface of the flange portion 110 of the housing 100 through the fastening member 1100 .
- a fastening hole 424 passed through by the fastening member 1100 may be formed in the second impeller cover 420 .
- the inner circumferential surface 422 of the second impeller cover 420 may contact the outer circumferential surface of the upper region of the coupling part 120 of the housing 110 .
- the second impeller cover 420 may be referred to as a 'guide vane' or a 'diffuser assembly'.
- the second impeller cover 420 may guide air sucked through the first impeller cover 410 toward the control unit 1000 .
- the impeller 500 may be disposed inside the impeller cover 400 .
- the impeller 500 may be coupled to the rotation shaft 300 .
- the impeller 500 may rotate in one direction or the other direction within the impeller cover 400 according to the rotation of the rotation shaft 300 .
- the magnet 600 may be coupled to the rotation shaft 300 .
- the magnet 600 may be coupled to a lower region of the rotation shaft 300 .
- the magnet 600 may face the stator 700 in which the coil 900 is wound.
- the magnet 600 may face the tissue shoe 730 of the stator 700 .
- the magnet 600 may be formed in a cylindrical shape.
- the magnet 600 may overlap the plurality of extension parts 150 of the housing 100 in a radial direction.
- the magnet 600 may overlap the straight portion 154 of the housing 100 in a radial direction.
- the magnet 600 may overlap the stator groove 160 in a radial direction.
- the stator 700 may be coupled to the housing 100 .
- the stator 700 may be coupled to the plurality of extension parts 150 of the housing 100 .
- the stator 700 may be press-fitted into the stator groove 160 of the housing 100 .
- the stator 700 may face the magnet 600.
- the stator 700 may include a stator core 710 .
- the stator core 710 may be formed in a cylindrical shape as a whole.
- the stator core 710 may be formed by stacking a plurality of core plates in an axial direction.
- the stator core 710 may be coupled to the housing 100 .
- the length or height of the stator core 710 in the axial direction may be greater than the length or height of the stator groove 160 .
- the stator core 710 may be press-fitted to the stator groove 160 .
- the stator core 710 may include a housing groove 712 formed on an outer circumferential surface.
- the housing groove 710 may extend inwardly from the outer circumferential surface of the stator core 710 and may extend in an axial direction.
- At least one extension part 150 of the housing 100 may be press-fitted into the housing groove 710 .
- the length of the housing groove 710 in the circumferential direction may be smaller than the length of the plurality of extension parts 150 in the circumferential direction.
- the bottom surface of the housing groove 710 may be in contact with the stator groove 160 formed in the plurality of extension parts 150 .
- the housing groove 712 extends from the outer circumferential surface of the stator 700 to the outer circumferential surface of the stator 700 from the bottom surface 7122 recessed inward in the radial direction, and from each end of the bottom surface 7122 in the circumferential direction, and includes a plurality of extension portions. Sides 7124 and 7126 contacting both sides 1502 and 1504 of 150 may be included. In this case, the bottom surface 7122 may extend from the upper surface 702 to the lower surface 704 of the stator 700 .
- the bottom surface 7122 of the housing groove 712 may contact the bottom surface 1602 of the stator groove 160 .
- the housing groove 712 may extend in a vertical direction and pass through the upper surface 702 and the lower surface 704 of the stator 700 .
- Both side surfaces 1502 and 1504 of the plurality of extension parts 150 may be press-fitted into the housing groove 712 .
- the radial depth d1 of the housing groove 712 may be smaller than the radial width d2 of the lower region of the plurality of extension parts 150 in which the stator groove 160 is formed. Through this, it is possible to provide a space in which the lower end 156 of the plurality of extension parts 150 can support the lower surface 704 of the stator 700 .
- the stator 700 may include a plurality of teeth portions 720 .
- the plurality of teeth portions 720 may extend radially inward from the stator core 710 .
- a coil 900 may be wound around the plurality of teeth portions 720 .
- the insulator 800 is disposed on the plurality of teeth 720 and the coil 900 is wound around the insulator 800 as an example, but the coil 900 without the insulator 800 It may be directly wound around the plurality of teeth portions 720 .
- the stator 700 may include a plurality of tissue shoes 730 .
- Each of the plurality of tissue shoes 730 may extend in a circumferential direction from each of the plurality of teeth portions 720 .
- a plurality of tissue shoes 720 may face the magnet 600 .
- each of the plurality of teeth portions 720 and the plurality of tissue shoes 730 is described as an example, but is not limited thereto, and the plurality of teeth portions 720 and the plurality of tissue shoes are formed. 730 may be variously changed according to the type and size of the motor 10 .
- the insulator 800 may be coupled to the stator 700.
- the insulator 800 may include a plurality of insulator units respectively disposed on the plurality of teeth portions 720 of the stator 700 .
- a plurality of coil units may be wound on each of the plurality of insulator units.
- the coil 900 may be wound around the stator 700 .
- the coil 900 may be wound around the insulator 800 .
- the coil 900 may include a plurality of coil units wound around each of the plurality of insulator units. A portion of the plurality of coil units may overlap the stator groove 150 in the radial direction.
- the coil 900 may not overlap the curved portion 152 of the housing 100 in the radial direction.
- the controller 1000 may be disposed under the housing 100 .
- the controller 1000 may be electrically connected to the coil 900 .
- the control unit 1000 may include a PCB (Printed Circuit Board) substrate, a plurality of elements disposed thereon, and a power supply unit connected to a power source.
- the controller 1000 may control power and/or current provided to the coil 900 .
- the coupling member 1100 may connect the impeller cover 400 and the housing 100 by bolting.
- the coupling member 1100 may pass through the coupling hole 424 of the second impeller cover 420 and be inserted into the coupling groove 112 of the housing 100 .
- FIG. 13 and 14 are perspective views of an impeller according to an embodiment of the present specification.
- 15 to 17 are cross-sectional views of impellers according to embodiments of the present specification.
- the impeller 500 includes a body 510, a coupling hole 516, a blade 520, grooves 530 and 540, and step portions 550 and 560. However, it may be implemented except for some of these configurations, and other additional configurations are not excluded.
- the impeller 500 will be described as being formed of a plastic material as an example.
- the body 510 may include an outer circumferential surface 512 and a lower surface 514 .
- the outer circumferential surface 512 of the body 510 may be referred to as a 'hub'.
- the outer circumferential surface 512 of the body 510 may be inclined downward as the distance from the rotation shaft 300 increases.
- An upper area in the axial direction of the outer circumferential surface 512 of the body 510 may have a smaller radius than a lower area.
- a blade 520 may be formed on the outer circumferential surface 512 of the body 510 .
- the lower surface 514 of the body 510 may face the second impeller cover 420 and the coupling part 120 of the housing 100.
- the coupling hole 516 may be formed in the central region of the body 510 . At least a portion of the coupling hole 516 may be penetrated by an upper region of the rotation shaft 300 . The air hole 516 may be disposed in an upper region of the rotational shaft 300 .
- the coupling hole 516 is described as being formed in a hole shape as an example, but may also have a groove shape concavely formed at the bottom.
- a bushing (not shown) may be disposed between the coupling hole 516 and the rotating shaft 300 .
- the blade 520 may be formed on the outer circumferential surface 512 of the body 510 .
- the blade 520 may extend radially outward and axially upward from the outer circumferential surface 512 of the body 510 .
- the blade 520 may include a plurality of blades spaced apart in the circumferential direction.
- the grooves 530 and 540 may be formed on the lower surface 514 of the body 510 .
- Grooves 530 and 540 may be concavely formed from the lower surface of the body upward. That is, the impeller 500 according to an embodiment of the present specification is not empty except for the coupling hole 516, and only the grooves 530 and 540 formed on the lower surface 514 are empty. Through this, since the weight of the lower region of the body 510 of the impeller 500 increases, deformation of the impeller 500 generated during high-speed rotation is minimized, and the blade 520 of the impeller 500 and the impeller cover 400 Contact between the inner surfaces can be prevented.
- the air gap between the blades 520 of the impeller 500 and the inner surface of the impeller cover 400 is minimized. Motor efficiency can be improved.
- the weight of the lower region of the body 510 of the impeller 500 is increased without adding a separate structure of the impeller 500, the manufacturing cost of the product can be reduced.
- the manufacturing process can be reduced by reducing the cooling time due to the excessive thickness of the body 510 while reducing the material cost through the grooves 530 and 540, and sink marks due to shrinkage occurring during cooling Product deformation can be reduced.
- grooves 530 and 540 may include a plurality of grooves.
- the plurality of grooves may include a first groove 530 and a second groove 540 disposed inside the first groove 530 .
- the first groove 530 and the second groove 540 may be spaced apart from each other in a radial direction.
- the first groove 530 and the second groove 540 may be spaced apart from each other in a circumferential direction.
- the first groove 530 and the second groove 540 may have concentricity.
- the outer and inner circumferential surfaces of the first groove 530 and the second groove 540 may be formed in a circular shape.
- the axial height of the first groove 530 may be smaller than the axial height of the second groove 540 .
- the minimum length between the outer circumferential surface 512 of the body 510 and the inner circumferential surface of the first groove 530 is preferably 2 mm or more.
- An inner surface of the second groove 540 may have a constant radius of curvature.
- the inner surface of the first groove 540 may have a radius of curvature greater than that of the other areas.
- each of the first groove 530 and the second groove 540 may be 0.1 times or more and 0.8 times or less of the axial height of the body 510 of the impeller 500 . Through this, it is possible to minimize the amount of deformation of the impeller 500 in the axial direction.
- the first stepped portion 550 may connect the inner end of the first groove 530 in the radial direction and the outer end of the second groove 540 in the radial direction.
- the first stepped portion 550 may be disposed above the lower surface 514 of the body 510 in the axial direction.
- the second stepped portion 560 may connect the inner end of the second groove 540 in the radial direction to the coupling hole 516 .
- the second stepped portion 560 may be disposed above the lower surface 514 of the body 510 in the axial direction. Through this, it is possible to prevent damage to the product by minimizing stress concentration generated when the rotating shaft 300 is press-fitted into the coupling hole 516 .
- the second stepped portion 560 overlaps the first stepped portion 550 in the radial direction has been described as an example, but unlike this, the second stepped portion 560 is located above the first stepped portion 550. can be placed. Through this, it is possible to prevent damage to the product by minimizing stress concentration generated when the rotating shaft 300 is press-fitted into the coupling hole 516 .
- a radial length between the first groove 530 and the second groove 540 may be greater than a radial length between the first groove 530 and the outer circumferential surface 512 of the body 510 .
- the radial length of the first stepped portion 550 is greater than the radial length of the lower surface 514 of the body 510 .
- a radial length between the first groove 530 and the second groove 540 may be greater than a radial length between the second groove 540 and the coupling hole 516 .
- the radial length of the first stepped portion 550 is greater than the radial length of the second stepped portion 560 .
- the first stepped portion 550 is deleted in the embodiment of FIG. 15 .
- the axial deformation of the impeller 500 can be reduced compared to the embodiment of FIG. 15 .
- the second stepped portion 560 is deleted in the embodiment of FIG. 16 .
- the axial deformation of the impeller 500 can be reduced compared to the embodiment of FIG. 16 .
- the radius of curvature of the radially inner region of the second groove 540 may be greater than that of the other regions.
- the number of the plurality of grooves 530 and 540 is two as an example, but the case of three or more is not excluded.
- the number of grooves 530 and 540 may be one. In this case, it may be understood that one of the first groove 530 and the second groove 540 is excluded.
- the first stepped portion 550 and the second stepped portion disposed between the first groove 540 and the coupling hole 516 ( 560) may be connected to each other.
- the radius of curvature of the outer region in the radial direction of the first groove 540 may be formed to be larger than the radius of curvature of the remaining regions, and the first groove 540 may be formed on the outer circumferential surface of the body 510 than the coupling hole 516 ( 512) may be disposed adjacent to.
- configuration A described in a specific embodiment and/or drawing may be combined with configuration B described in another embodiment and/or drawing. That is, even if the combination between the components is not directly explained, it means that the combination is possible except for the case where the combination is impossible.
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (15)
- 하우징;상기 하우징의 안에 배치되는 베어링;상기 베어링에 회전 가능하게 결합되는 회전축;상기 하우징의 상부에 배치되는 임펠러 커버;상기 임펠러 커버의 안에 배치되고 상기 회전축에 결합되는 임펠러;상기 회전축의 하부 영역에 결합되는 마그네트;상기 하우징에 결합되고 상기 마그네트와 마주보는 스테이터; 및상기 스테이터에 권선되는 코일을 포함하고,상기 임펠러는 몸체와, 상기 몸체의 외주면에 형성되는 복수의 블레이드와, 상기 몸체의 하면에서 상부로 오목하게 형성되는 복수의 홈과, 상기 몸체의 중앙 영역에 형성되고 상기 회전축이 배치되는 결합공을 포함하는 모터.
- 제 1 항에 있어서,상기 복수의 홈은 반경 방향으로 서로 이격되는 모터.
- 제 1 항에 있어서,상기 복수의 홈 각각은 원주 방향으로 연장되는 모터.
- 제 3 항에 있어서,상기 임펠러의 하부에서 상기 임펠러의 하면을 바라볼 때, 상기 복수의 홈 각각의 외주면과 내주면은 원 형상으로 형성되는 모터.
- 제 1 항에 있어서,상기 복수의 홈은 원주 방향으로 연장되는 제1 홈과, 상기 제1 홈의 내측에 배치되고 원주 방향으로 연장되는 제2 홈을 포함하는 모터.
- 제 5 항에 있어서,상기 제1 홈의 축 방향 높이는 상기 제2 홈의 축 방향 높이보다 작게 형성되는 모터.
- 제 5 항에 있어서,상기 제1 홈의 내측단과 상기 제2 홈의 외측단을 연결하고 상기 몸체의 하면보다 상부에 배치되는 제1 단차부를 포함하는 모터.
- 제 7 항에 있어서,상기 제2 홈의 내측단과 상기 결합공을 연결하고 상기 몸체의 하면보다 상부에 배치되는 제2 단차부를 포함하고,상기 제2 단차부는 상기 제1 단차부보다 상부에 배치되는 모터.
- 제 5 항에 있어서,상기 제2 홈의 내측단과 상기 결합공을 연결하고 상기 몸체의 하면보다 상부에 배치되는 제2 단차부를 포함하는 모터.
- 제 5 항에 있어서,상기 제1 홈과 상기 제2 홈 사이의 반경 방향 길이는 상기 제1 홈과 상기 몸체의 외주면 사이의 반경 방향 길이보다 큰 모터.
- 제 5 항에 있어서,상기 제1 홈과 상기 제2 홈 사이의 반경 방향 길이는 상기 제2 홈과 상기 결합공 사이의 반경 방향 길이보다 큰 모터.
- 제 5 항에 있어서,상기 제2 홈의 내측면은 일정한 곡률 반경을 가지는 모터.
- 제 5 항에 있어서,상기 제1 홈의 내측면은 반경 방향 외측 영역의 곡률 반경이 나머지 영역의 곡률 반경보다 크게 형성되는 모터.
- 제 1 항에 있어서,상기 복수의 홈은 동심을 가지는 모터.
- 제 1 항에 있어서,상기 복수의 홈의 축 방향 높이는 상기 임펠러의 상기 몸체의 축 방향 높이의 0.1배 이상 0.8배 이하인 모터.
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EP21962641.3A EP4425768A1 (en) | 2021-10-29 | 2021-12-16 | Motor |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2003189522A (ja) * | 2001-12-21 | 2003-07-04 | Namiki Precision Jewel Co Ltd | 小型扁平モータ、小型扁平ファンモータ並びに同モータを備える空気強制供給型空気電池、小型扁平振動モータ並びに同モータを備える携帯用情報機器 |
KR101873117B1 (ko) * | 2016-11-07 | 2018-06-29 | 엘지전자 주식회사 | 모터 |
US20190107114A1 (en) * | 2015-04-30 | 2019-04-11 | Zhejiang Sanhua Automotive Components Co., Ltd. | Electronic pump |
JP2019122146A (ja) * | 2018-01-05 | 2019-07-22 | 三菱電機株式会社 | 回転電機、送風機、および回転電機の製造方法 |
JP2021085399A (ja) * | 2019-11-29 | 2021-06-03 | 日本電産株式会社 | 送風装置及び掃除機 |
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KR101287468B1 (ko) | 2006-08-25 | 2013-07-19 | 엘지전자 주식회사 | 모터조립체 및 이를 구비한 진공청소기 |
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- 2021-10-29 KR KR1020210147006A patent/KR102611297B1/ko active IP Right Grant
- 2021-12-16 CN CN202180103343.9A patent/CN118120134A/zh active Pending
- 2021-12-16 WO PCT/KR2021/019179 patent/WO2023075018A1/ko active Application Filing
- 2021-12-16 EP EP21962641.3A patent/EP4425768A1/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003189522A (ja) * | 2001-12-21 | 2003-07-04 | Namiki Precision Jewel Co Ltd | 小型扁平モータ、小型扁平ファンモータ並びに同モータを備える空気強制供給型空気電池、小型扁平振動モータ並びに同モータを備える携帯用情報機器 |
US20190107114A1 (en) * | 2015-04-30 | 2019-04-11 | Zhejiang Sanhua Automotive Components Co., Ltd. | Electronic pump |
KR101873117B1 (ko) * | 2016-11-07 | 2018-06-29 | 엘지전자 주식회사 | 모터 |
JP2019122146A (ja) * | 2018-01-05 | 2019-07-22 | 三菱電機株式会社 | 回転電機、送風機、および回転電機の製造方法 |
JP2021085399A (ja) * | 2019-11-29 | 2021-06-03 | 日本電産株式会社 | 送風装置及び掃除機 |
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CN118120134A (zh) | 2024-05-31 |
KR102611297B1 (ko) | 2023-12-08 |
KR20230062089A (ko) | 2023-05-09 |
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