WO2015186896A1

WO2015186896A1 - Motor assembly

Info

Publication number: WO2015186896A1
Application number: PCT/KR2015/003105
Authority: WO
Inventors: 방명배; 박종진; 인병렬
Original assignee: 삼성전자주식회사
Priority date: 2014-06-05
Filing date: 2015-03-30
Publication date: 2015-12-10

Abstract

The present invention relates to a motor assembly which is used for a domestic cleaning apparatus and the like, the motor assembly comprising: a stator; a rotor which electromagnetically interacts with the stator and is rotatable; and a shaft coupling unit which has an impeller body, a plurality of blades that generate air current by means of rotation, and a rotor shaft press fit such that the impeller and the rotor shaft operate integrally. According to the present invention, life can be extended by having strong coupling of the impeller and the rotor shaft, and the impeller and the rotor shaft can be coupled while maintaining a concentric state.

Description

Motor assembly

The present invention relates to a motor assembly with improved coupling structure of the impeller.

In general, a vacuum cleaner is a home appliance that filters foreign matters from the inside of the body after inhaling air containing foreign matters such as dust by using a vacuum pressure generated by a motor mounted inside the cleaner body.

The motor generates suction by lowering the internal pressure by discharging the air inside the vacuum cleaner to the outside. The suction force generated in this way allows the foreign matter such as dust on the cleaning surface to be sucked together with the external air through the suction means to be removed by the dust collector.

A motor is a machine that obtains rotational force from electrical energy and includes a stator and a rotor. The rotor is configured to electromagnetically interact with the stator and is rotated by a force acting between the magnetic field and the current flowing in the coil.

The motor rotates the rotor to generate suction force by the suction fan rotating with the rotor, and these configurations can be arranged in one module. However, the configuration in which the motor and the motor are fixed, and the configuration of the suction fan and the like interfere with each other's space, resulting in an increase in the overall size of the cleaner.

One aspect of the present invention provides a motor assembly that improves the coupling structure of the impeller and the rotor to secure the coupling and improve the manufacturing efficiency.

Motor assembly according to the spirit of the present invention is a stator; A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator; An impeller coupled to the rotor shaft; wherein the impeller includes: an impeller body; A plurality of wings provided on an outer surface of the impeller body to generate airflow through rotation; And a shaft coupling portion having a shaft insertion hole into which the rotor shaft is inserted, the shaft coupling portion provided in the impeller body, wherein the rotor shaft is press-fitted so that the impeller and the rotor shaft are integrally operated. It features.

The shaft coupling portion, the shaft coupling surface is the rotor shaft is pressed; And a gradient coupling surface extending from the shaft coupling surface and formed to be gradient so as to gradually increase an inner diameter with respect to an insertion direction of the rotor shaft.

Between the outer circumferential surface of the rotor shaft and the gradient coupling surface may be characterized in that the adhesive.

And the shaft coupling part includes a deformation preventing unit at least partially disposed from one end of the shaft coupling part so as to prevent deformation of the shaft coupling part when the rotor shaft is coupled, and is provided to insert insert together with the impeller. It can be characterized.

And the shaft coupling part includes a deformation preventing unit disposed in an entire area of the shaft coupling part to prevent deformation of the shaft coupling part when the rotor shaft is coupled, and to be insert-inserted together with the impeller. Can be.

The deformation preventing unit may be formed on at least a portion of the deformation preventing unit, and the deformation preventing gradient surface is formed to be gradient so as to widen the inner diameter in contact with the insertion direction of the rotor shaft.

The rotor shaft may be provided on an outer circumferential surface of the rotor shaft to correspond to the shaft coupling surface, and may include a slip prevention part having a knurled shape.

The rotor shaft is provided in the insertion direction end portion into the impeller, and includes a screw protrusion formed on the outer circumferential surface; and the shaft coupling portion, a screw groove portion corresponding to the screw protrusion; characterized in that it comprises a can do.

The screw groove portion is formed stepped so that the inner diameter is smaller than the inner circumferential surface of the adjacent shaft coupling portion, the screw projection is formed stepped so that the outer diameter is smaller than the outer peripheral surface of the adjacent rotor shaft is coupled to the screw thread groove portion. You can do

The rotor shaft is provided in the insertion direction end portion into the impeller, and includes a screw protrusion formed on the outer circumferential surface thereof, wherein the shaft coupling portion, the insert injection is inserted into the impeller, the screw protrusion is provided to engage Nut unit; may be characterized in that it comprises a.

Motor assembly according to the spirit of the present invention is a stator; A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator; An impeller coupled to the rotor shaft, wherein the rotor shaft comprises: a first shaft; And a second shaft extending in the same longitudinal direction as the first shaft and having a diameter smaller than that of the first shaft, wherein the impeller includes: an impeller body; A plurality of wings provided on an outer circumferential surface of the impeller body to generate airflow through rotation; And a first shaft coupling part in which the first shaft is seated, and a second shaft coupling part in which the second shaft is seated, and a shaft coupling part provided in the impeller body to which the rotor shaft is coupled. .

The shaft coupling portion is provided at an end of the second shaft coupling portion so that the internal air is discharged when the rotor shaft is pressed into the shaft coupling portion, the inner space formed by coupling the rotor shaft to the impeller and the impeller It may further include a shaft cover having a discharge hole is provided so that the outer space is in communication, the shaft cover provided to block one end of the rotor shaft.

Motor assembly according to the spirit of the present invention is a stator; A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator; An impeller coupled to the rotor shaft; wherein the impeller includes: an impeller body; A plurality of wings provided on an outer circumferential surface of the impeller body to generate airflow through rotation; And a shaft engaging portion formed along an inner circumferential surface of the rotor shaft so that the rotor shaft is coupled, the shaft coupling portion provided on the impeller body, wherein the rotor shaft comprises: a first shaft; And a second shaft formed on the first shaft so as to have a diameter smaller than that of the first shaft, the second shaft being formed to form an adhesive space between the outer circumferential surface and the inner circumferential surface of the shaft insertion hole. The first shaft includes the shaft insertion hole. It is pressed and coupled to the, the second shaft is characterized in that the adhesive is introduced into the adhesive space coupled.

The second shaft may be provided on the first shaft.

The second shaft may be provided at an end of the first shaft.

The rotor shaft further includes a third shaft extending in the same longitudinal direction as the second shaft and having a thread formed on an outer circumferential surface thereof, wherein the shaft coupling part includes an outer circumferential surface having a diameter larger than that of the shaft insertion hole, and And a nut unit having an inner circumferential surface formed with a screw groove corresponding to the thread of the third shaft, and to which the third shaft is coupled.

Motor assembly according to the spirit of the present invention is a stator; A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator; And an impeller having an impeller body, a plurality of wings provided on an outer surface of the impeller body to generate airflow, and a shaft coupling part provided on the impeller body to couple the rotor shaft, and an insert impeller inserted together with the rotor shaft. The rotor shaft may include a plurality of slip preventing grooves provided to correspond to the shaft coupling part and provided with grooves along a rotation axis direction and spaced apart at regular intervals in a circumferential direction to prevent slippage of the impeller; Characterized in that it comprises a.

The impeller may be characterized in that the adhesive is applied to the plurality of slip preventing grooves and the insert injection together with the rotor shaft.

The rotor shaft may be provided at an end of the rotor shaft to be adjacent to the plurality of slip preventing grooves, and a flange-shaped leak preventing flange provided to prevent the adhesive applied to the plurality of slip preventing grooves from leaking out. It may be characterized in that it further comprises.

The leakage preventing flange may be provided on the inner surface of the adhesive leaking to the outside, the leakage preventing groove is formed concave along the circumference of the rotor shaft; may be characterized in that it comprises a.

The motor assembly of the present invention can increase the life of the impeller and the rotor shaft generating the airflow can be increased, and the impeller and the rotor shaft can be coupled while maintaining the concentric.

1 is a view showing a cleaner according to a first embodiment of the present invention.

2 is a cross-sectional view of a partial configuration of the cleaner according to the first embodiment of the present invention.

3 is a perspective view of a motor assembly according to a first embodiment of the present invention;

4 is a cross-sectional view of a motor assembly according to a first embodiment of the present invention.

5 is an exploded perspective view of the motor assembly according to the first embodiment of the present invention.

6a and 6b are exploded perspective views of the motor module according to the first embodiment of the present invention;

7 is an exploded perspective view of a motor according to a first embodiment of the present invention.

8 is a diagram of an arrangement relationship between a circuit board and a motor according to the first embodiment of the present invention;

9 is a front view of the motor according to the first embodiment of the present invention.

10 is a diagram of a magnetic field flow of a motor according to the first embodiment of the present invention.

11 is a perspective view of a rotor according to a first embodiment of the present invention.

12 is an exploded perspective view of the rotor according to the first embodiment of the present invention.

13A and 13B are perspective views of the support member of the rotor according to the first embodiment of the present invention.

14 is a sectional view of a rotor according to a first embodiment of the present invention.

15 is an exploded perspective view of the rotor and the impeller according to the first embodiment of the present invention.

16 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the first embodiment of the present invention.

17 is a view of a cleaner according to a second embodiment of the present invention.

18 is a cross-sectional view of a partial configuration of a cleaner according to a second embodiment of the present invention.

19 is a perspective view of a motor assembly according to a second embodiment of the present invention.

20 is a cross-sectional view of a motor assembly according to a second embodiment of the present invention.

21 is an exploded perspective view of a motor assembly according to a second embodiment of the present invention.

22A and 22B are exploded perspective views of a motor module according to a second embodiment of the present invention.

23 is an exploded perspective view of a motor according to a second embodiment of the present invention.

24 is a diagram relating to a layout relationship between a circuit board and a motor according to the second embodiment of the present invention.

25 is a front view of a motor according to a second embodiment of the present invention.

26 is a diagram of magnetic field flow of the motor according to the second embodiment of the present invention.

27 is a graph relating to the performance of a motor according to a second embodiment of the present invention.

Fig. 28 is a view of the stator according to the third embodiment of the present invention.

29 and 30 are perspective views of a motor module according to a fourth embodiment of the present invention.

31 is a perspective view of the front seat housing according to the fourth embodiment of the present invention.

32 is a perspective view of a rear seating housing according to a fourth embodiment of the present invention.

33 is a diagram of a motor according to a fourth embodiment of the present invention.

34 is a view of the arrangement of the motor and the seating housing according to the fourth embodiment of the present invention;

35 is a view of a manufacturing method of a rotor according to a fifth embodiment of the present invention.

36 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the sixth embodiment of the present invention.

37 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the seventh embodiment of the present invention.

38 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the eighth embodiment of the present invention.

39 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the ninth embodiment of the present invention.

40 is a view of the coupling of the rotor shaft and the impeller according to the tenth embodiment of the present invention.

41A and 41B are sectional views relating to the coupling of the rotor shaft and the impeller according to the eleventh embodiment of the present invention.

42 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the twelfth embodiment of the present invention.

43A and 43B are sectional views relating to the coupling of the rotor shaft and the impeller according to the thirteenth embodiment of the present invention.

44A and 44B are cross-sectional views relating to coupling of a rotor shaft and an impeller according to a fourteenth embodiment of the present invention.

45 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the fifteenth embodiment of the present invention.

46 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the sixteenth embodiment of the present invention.

47A and 47B are sectional views relating to the coupling of the rotor shaft and the impeller according to the seventeenth embodiment of the present invention.

48A and 48B are cross-sectional views relating to coupling of a rotor shaft and an impeller according to an eighteenth embodiment of the present invention.

49A and 49B are cross-sectional views relating to coupling of a rotor shaft and an impeller according to a nineteenth embodiment of the present invention.

50 is a perspective view of a rotor according to a twentieth embodiment of the invention.

51A and 51B are perspective views of an auxiliary member of a rotor according to a twentieth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

1 is a view showing a cleaner according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of a partial configuration of the cleaner according to the first embodiment of the present invention.

The cleaner 1 according to the first embodiment of the present invention is applied to the stick type cleaner 1.

The cleaner 1 of the embodiment of the present invention includes a stick body 10, a suction unit 20, and a cleaning base body 30.

Stick body 10 is a portion coupled to the upper end of the cleaning main body 30, it may be provided so that the user can operate the cleaner 1 by holding. The stick body 10 is provided with a control unit 12 so that the user can control the cleaner 1.

The suction part 20 is provided under the cleaning main body 30 and is arranged to be in contact with the surface to be cleaned. The suction part 20 is provided to be in contact with the surface to be cleaned, so that dust or dirt on the surface to be cleaned can be introduced into the cleaning body 30 by the suction force generated from the motor assembly 100.

The cleaning main body 30 includes a motor assembly 100 and a dust container 40 provided therein. The motor assembly 100 generates power to generate a suction force in the cleaning body 30, and the dust container 40 is disposed upstream of the air flow than the motor assembly 100 and flows in from the suction unit 20. It is designed to filter out dust and dirt in the air.

3 is a perspective view of a motor assembly according to a first embodiment of the present invention, FIG. 4 is a cross-sectional view of a motor assembly according to a first embodiment of the present invention, and FIG. 5 is an exploded view of a motor assembly according to a first embodiment of the present invention. Perspective view.

The motor assembly 100 is provided inside the cleaning main body 30 to generate a suction force.

The motor assembly 100 includes a housing 102, a motor 170 installed inside the housing 102 to generate suction force, and a seating housing 142 provided to fix the motor 170 in the housing 102. And an impeller 130 installed on the rotor shaft 172a of the motor 170 to rotate.

The housing 102 includes a first housing 110 and a second housing 120 provided to be coupled to the first housing 110. The housing 102 may be provided to have a substantially cylindrical shape, but various shapes may be provided without being limited thereto. The first housing 110 and the second housing 120 may be detachably provided in the axial direction of the rotor shaft 172a. The first housing 110 is provided with an air inlet 111 so that air introduced by the motor 170 flows into the housing 102, and the second housing 120 has air introduced into the housing 102. The air outlet 121 is provided to be discharged. Since the second housing 120 is coupled to the first housing 110 at the rear surface of the first housing 110, the air inlet 111 is provided at the front of the housing 102, and the air outlet 121 is provided at the rear thereof. Can be prepared. However, the arrangement of the air inlet 111 and the air outlet 121 is not limited.

The first housing 110 and the second housing 120 are combined to form an air passage 113 from the air inlet 111 to the air outlet 121, and the motor 170 or the impeller 130 therein. The inner space 127 in which the back is disposed is formed.

The air passage 113 may include a module passage 113a and an external module passage 113b. Intake of air from the motor assembly 100 is performed by the impeller 130, and the sucked air flows through the air passage 113. The air flowing into the housing 102 is introduced into the motor module 140 by the flow guide portion 194 of the insulator 190, the outside of the motor module 140 and the housing ( The module outer flow passage 113b passing between the inner sides of the 102 may flow. The intake air passing through the module flow passage 113a can cool the heat generated from the inside of the motor module 140. The suction air passing through the module flow passage 113a and the suction air passing through the module outer flow passage 113b may cool the heat generated from the circuit board 196 while passing through the circuit board 196.

The first housing 110 may include a shroud 112.

The shroud 112 is provided to correspond to the impeller 130 or the diffuser portion 122 to be described later, to guide the air introduced into the housing 102 by the motor 170. The shroud 112 is a space formed by the shroud 112 with respect to the axial direction of the rotor shaft 172a so that the flow path is formed in a wide direction along the advancing direction of the intake air by the motor 170 from the air intake port 111. This can be arranged to be wider. The shroud 112 guides the air introduced through the air inlet 111 into the housing 102 and may be provided in a shape corresponding to the upper portion of the impeller 130.

An impeller 130 may be provided inside the air inlet 111 of the first housing 110. The impeller 130 is provided to rotate together with the rotor shaft 172a. The impeller 130 may be provided with a plurality of wings 132 for generating a flow of air. Impeller 130 is provided so that the rotation radius of the plurality of wings 132 of the impeller 130 along the direction away from the rotor 172, the air flowing in the direction of the rotor shaft (172a) in accordance with the rotation of the impeller 130 It is provided to be discharged in the radial direction of the rotor shaft (172a). Although an embodiment of the impeller 130 has been described, the shape and arrangement of the impeller 130 is not limited, and the configuration is provided to allow air to flow.

The material of the impeller 130 may include plastic. In detail, it may include a carbon fiber reinforced plastic including carbon fibers.

The second housing 120 may include a diffuser unit 122. The diffuser portion 122 is provided to increase the flow rate of air flowing by the impeller 130. It is provided to be disposed at the outer side along the radial direction of the impeller 130.

The diffuser portion 122 may be provided in a radial direction with respect to the impeller 130. In detail, it may be formed in a direction extending with respect to the plurality of wings 132 of the impeller 130. The diffuser portion 122 may be formed of a plurality of

ribs

123 and 124, and the plurality of

ribs

123 and 124 may be formed to be spaced apart in a direction extending with respect to the plurality of wings 132. Can be. The plurality of

ribs

123 and 124 are formed to increase the flow velocity of the air while guiding the air flowing by the impeller 130. In detail, the diffuser portion 122 and the shroud 112 formed in the first housing 110 form the diffuser flow path 125 to guide the air flowing by the impeller 130 to increase the air flow rate. It is formed to.

The plurality of

ribs

123 and 124 may include a first rib 123 and a second rib 124. The first rib 123 is provided on the same plane as the downstream end of the air flow by the impeller 130, and the second rib 124 has air guided by the first rib 123. It is formed to have a predetermined slope in the direction of the rotor shaft 172a so as to flow along the up and down direction, which is the direction of the rotor shaft 172a in the interior thereof.

The motor module 140 may be provided inside the housing 102. The motor module 140 is provided such that the motor 170 is fixed inside the housing 102 as one module.

The motor module 140 may include a motor 170 and a seating housing 142.

The seating housing 142 may include a front seating housing 150 and a rear seating housing 160 provided to be coupled to the front seating housing 150 with the motor 170 therebetween.

The front seating housing 150 is provided to be fixed to the housing 102. In detail, a hole-shaped seating hole 126 is formed at the center of the second housing 120 to be coupled to the front seating housing 150, and the front seating housing 150 may be coupled to the seating hole 126. have. It may be fitted and the coupling method is not limited.

The front seating housing 150 may include a front seating housing 151, an impeller seating portion 153, and a front seating portion 154. The front seating housing body 151 may be formed in a substantially disk shape, and as described above, corresponds to the shape of the seating hole 126 to be coupled to the hole-shaped seating hole 126 of the second housing 120. Body coupling portion 152 may include.

The impeller seating portion 153 is provided so that the impeller 130 is seated at the front of the front seating housing 151. In front of the impeller seat 153 is provided so as to correspond to the shape of the back of the impeller 130 so that the impeller 130 coupled to the rotor shaft 172a does not interfere with the rotation.

The front seat 154 is provided so that the motor 170 is seated on the rear surface of the front seat housing 151. The front seat 154 is provided to seat and fix the stator 180 such that the center of the rotor 172 which is rotatably provided is the same as the center of rotation of the impeller 130.

The shape of the front seat 154 is not limited, and in the embodiment of the present invention, the front seat housing 151 is provided to protrude from the front seat housing 151 and the motor 170 to be seated at a predetermined interval. It is formed to be.

Although the arrangement of the front seat 154 is not limited, in the embodiment of the present invention, since the stator 180 is formed long in the first direction w1, the front seat 154 is disposed at each end of the stator 180. Four may be arranged to correspond.

The rear seating housing 160 is provided to be coupled to the front seating housing 150, and the motor 170 is disposed between the front seating housing 150 and the front seating housing 150.

The rear seating housing 160 may include a rear seating housing 161 and a rear seating portion 164. The rear seat housing body 161 may be formed long along the longitudinal direction of the stator 180 to correspond to the shape of the stator 180.

Although the arrangement of the rear seat 164 is not limited, in the embodiment of the present invention, since the stator 180 is formed long in the longitudinal direction, four rear seat 164 may be formed to correspond to each end of the stator 180. Can be arranged.

The front seating housing 150 and the rear seating housing 160 have

screw holes

151b and 161b for coupling, respectively, and are provided to be coupled by screws 148.

The structure in which the motor 170 is fixed inside the front seating housing 150 and the rear seating housing 160 will be described in detail later.

6A and 6B are exploded perspective views of the motor module according to the first embodiment of the present invention.

At the centers of the front seat housing 150 and the rear seat housing 160, the front through hole 151a and the rear through hole 161a are provided to allow the rotor shaft 172a to pass therethrough. The front bearing 173a and the rear bearing 173b may be disposed in the front through hole 151a and the rear through hole 161a to rotate the rotor shaft 172a, respectively.

The front seating housing 150 may include a front seating protrusion 156 and a front seating portion 154.

The front seat 154 is provided to the inside of the front seat housing 150, it is provided so that one side of the motor 170 is seated. In the state where the stator 180 is seated or fixed to the front seat 154, the front through-hole 151a is provided with a plurality of front seats so that the centers of the rotor 172, the impeller 130, and the diffuser unit 122 coincide with each other. It may be formed in the center of the portion 154.

The front seating protrusion 156 is formed to protrude from the body of the front seating housing 150 along the circumference of the front seating portion 154, and is provided to surround the motor 170 in its inner surface. The front seating protrusion 156 prevents the motor 170 from being displaced in a direction perpendicular to the rotor shaft 172a when the motor assembly 100 operates. In detail, the front surface of the motor 170 is seated on the front seat 154, and the side surface of the motor 170 is seated on the front protrusion seating surface 156a of the front seating protrusion 156. The front seating protrusion 156 may be provided with a front guide surface 156b for guiding the motor 170 so as to easily seat the front seating portion 154. The front guide surface 156b may be formed at an end of the front seating protrusion 156 to have an inclination at an angle therein, and may be provided to be connected to the front protrusion seating surface 156a.

The body of the front seating housing 150 is formed in a substantially circular shape, four front seating protrusions 156 are formed to protrude from the body of the front seating housing 150.

The rear seating housing 160 may include a rear seating protrusion 166 and a rear seating portion 164.

The rear seat 164 is provided inside the rear seat housing 160, and is provided to seat the other side of the motor 170. In the state where the stator 180 is seated or fixed to the rear seat 164, the rear through-hole 161a may have a plurality of rear seats so that the centers of the rotor 172, the impeller 130, and the diffuser unit 122 coincide with each other. It may be formed in the center of the portion 164.

The rear seating protrusion 166 protrudes from the body of the rear seating housing 160 along the circumference of the rear seating part 164, and is provided to surround the motor 170. The rear seating protrusion 166, together with the front seating protrusion 156, prevents the motor 170 from being displaced in a direction perpendicular to the rotor shaft 172a when the motor assembly 100 operates.

When the motor 170 and the rear seating protrusion 166 are coupled to each other, the motor 170 is formed to have a predetermined angle of inclination in the rear seating protrusion 166 so as to be easily seated on the rear seating portion 164. The rear guide surface 167b may be formed. In detail, the rear surface of the motor 170 is seated on the rear seating portion 164, and the side surface of the motor 170 is seated on the rear protrusion seating surface 167a of the rear seating protrusion 166. The rear seating protrusion 166 may be provided with a rear guide surface 167b for guiding the motor 170 to easily seat the rear seating portion 164. The rear guide surface 167b may be provided at an end of the rear seating protrusion 166 to be inclined at an angle, and may be provided to be connected to the rear protrusion seating surface 167a.

The body of the rear seating housing 160 may be formed long along the first direction w1 in the longitudinal direction of the stator 180 so as to correspond to the shape of the stator 180 described later. Four rear seating protrusions 166 may be formed to be disposed at corresponding positions with the front seating protrusions 156 of the front seating housing 150.

The rear seat housing 160 may be provided with a magnet sensor 144.

The magnet sensor 144 is provided on the same axis as the magnet of the rotor 172, so that the position according to the rotation of the rotor 172 can be grasped. This information is transmitted to a position sensor (not shown) of the circuit board 196, and thereby the position control of the rotor 172 can be performed.

The magnet sensor 144 may be disposed to be seated on the sensor bracket 146 and transmit information to a position sensor (not shown) of the circuit board 196. One end of the sensor bracket 146 may be coupled to the sensor seat 168 provided on the rear surface of the rear seat housing 160, and the other end thereof may be coupled to the circuit board 196. By disposing the magnet sensor 144 without directly positioning the position sensor on the rotor 172, the position control of the rotor 172 can be realized through the addition of a simple structure.

The front seating housing 150 and the rear seating housing 160 have

screw holes

151b and 161b for coupling, respectively, and are provided to be coupled by screws 148. In detail, in the present embodiment, one is provided at each of the four front seats 154 and one at each of the four rear seats 164, and the screw 148 penetrates through the screw holes 161b of the rear seats 164. It is provided to be coupled to the screw hole (151b) of the corresponding front seating portion (154). That is, the front seating housing 150 and the rear seating housing 160 may be coupled and fixed with four screws 148, respectively.

The motor 170 may include a rotor 172 and a stator 180.

The rotor 172 is rotatably provided at the center of the stator 180.

The stator 180 is provided to electromagnetically interact with the rotor 172.

The stator 180 may include a stator body 182, an insulator 190, and a coil 195.

The stator body 182 is provided with a pair and is disposed in the first direction w1 to face each other with the rotor 172 therebetween. That is, the stator body 182 may be disposed long to face each other. The pair of stator bodies 182 may be provided to be coupled to each other in the first direction w1 which is a longitudinal direction. That is, the stator 180 is not provided in a circular shape along the circumferential direction around the rotor 172, but the stator 180 is provided to surround the rotor 172, but is formed in the first direction w1. May be longer than a length formed in the second direction w2 perpendicular to the first direction w1. That is, when the length formed in the first direction w1 of the stator 180 is L1 and the length formed in the second direction w2 is L2, L1 may be formed larger than L2.

As the stator 180 is formed longer in one direction than in the other direction, the space in the other direction is wider than the space in the one direction of the stator 180. Therefore, it is possible to secure a flow path passing through the space, thereby improving the motor cooling and motor assembly performance.

As the stator 180 is formed in the first direction w1, the placement area 188 may be provided along the circumferential direction of the stator 180 about the rotor 172. That is, the placement area 188 may be provided at the side of the stator 180, which is a portion perpendicular to the longitudinal direction of the stator 180.

The arrangement area 188 is an area provided on the same plane as the stator 180 and is provided to improve the space utilization of the internal space 127 of the motor assembly 100. The arrangement region 188 is formed to have a substantially semi-circular shape, and the arrangement of the motor assembly 100 may be arranged in the arrangement region 188, and in the embodiment of the present invention, the capacitor 198 may be disposed. .

The arrangement area 188 may be provided with a pair on both sides of the stator 180, and a pair of capacitors 198 may also be provided. In an exemplary embodiment of the present invention, four of each of two placement regions 188 may be disposed. The capacitor 198 has a function of flattening a voltage, removing ripple, and the like.

A rotor accommodating portion 187a for accommodating the rotor 172 is formed at the center portion of the pair of stator bodies 182. The stator body 182 may be formed by stacking a pressed iron plate.

The stator body 182 may include at least one stator core 184. A plurality of stator cores 184 may be provided and may be provided side by side. The pair of stator bodies 182 may have at least two stator cores 184 provided in parallel with each other, and may be provided symmetrically with the rotor interposed therebetween.

The stator core 184 includes a center core 185 and a side core 186 provided on the side of the center core 185.

The center core 185 is provided to face each other with respect to the rotor 172, and a rotor accommodating part 187a is formed between the center cores 185 so that the rotor 172 is rotatable. The pair of side cores 186 may be provided at both sides of the center core 185, and may be provided in parallel with the center core 185, respectively.

The stator core 184 of the pair of stator bodies 182 and the stator core 184 of the other stator body 182 may be formed to be arranged on the same line. That is, the stator cores 184 may be arranged in the same line to face each other. In other words, the stator core 184 of the other stator body 182 may be disposed on the longitudinal extension line of the stator core 184 of the pair of stator bodies 182.

The side cores 186 provided at both sides of the center core 185 may include a pair of side cores 186 of one stator 180 facing each other and a pair of other stator 180s facing each other. The side cores 186 may be provided to be coupled to each other. That is, the coupling protrusion 186a may be provided at one side of the side cores 186 facing each other, and the coupling groove 186b may be formed at the other side thereof so that the coupling protrusion 186a may be inserted and coupled thereto.

Since the center core 185 and the side core 186 are arranged side by side in the same direction, the winding of the coil 195 to the stator 180 may be conveniently performed.

A stator slot 187b is formed between the stator cores 184. As the coil 195 is wound around the stator cores 184, the coil 195 is accommodated in the stator slots 187b. At an inner end of the stator cores 184 adjacent to the rotor 172, an extension core portion 185a is formed in which the width of the stator cores 184 is partially extended. In detail, the inner end portion of the center core 185 facing the rotor 172 is formed with an expansion core portion 185a formed to partially extend the width of the center core 185 to surround the rotor 172. . A gap 185b for rotating the rotor 172 is formed between the inner surface of the expansion core portion 185a and the outer surface of the rotor 172.

The insulator 190 is formed of a material having electrical insulation, is formed to surround a part of the stator 180, is formed to surround the stator core 184. The insulator 190 includes an insulator body 191 provided to correspond to one surface of the stator body 182, a center core support part 192 provided to correspond to the center core 185 in the insulator body 191, and a center core. A coil guide part 193 protruding radially inward from the support part 192 is included.

The coil 195 is wound over the center core 185 and the center core support 192 with the insulator 190 coupled to the stator body 182. Although it may be wound over the side core 186 and the insulator 190 surrounding the side core 186, in the embodiment of the present invention, only the part wound around the center core 185 and the center core support 192 will be described. do. That is, in the embodiment of the present invention, the coil 195 is wound around the center core 185 as an example, but not only the center core 185 but also the pair of side cores 186 for output density and easy control. Also, the coil 195 may be wound to have three phase polarities.

The insulator 190 may include a flow guide portion 194. The flow guide portion 194 may be provided to be inclined toward the air flow passage 113 from the longitudinal end of the stator 180, through this configuration, a portion of the air sucked into the housing 102 by the impeller 130 By passing through the inside of the motor module 140, to form a module flow passage (113a). That is, the air flow passage 113 is divided into a module flow passage 113a and a module outer flow passage 113b by the flow path guide portion 194.

The insulator 190 may include a body coupling part 191a. The body coupling part 191a is provided at one side of the insulator body 191 and is provided to guide the coil 195 wound on the motor 170 to the circuit board 196. In addition, the body coupling part 191a is provided to be inserted into and fixed to the circuit board 196 so that the motor 170 and the circuit board 196 may be coupled to each other.

FIG. 8 is a diagram of an arrangement relationship between a circuit board and a motor according to the first embodiment of the present invention.

A circuit board 196 may be provided below the motor 170 to transmit an electrical signal to the motor 170. One surface of the circuit board 196 may be provided with a mounting region 197 in which circuit elements are disposed. Circuit elements such as a heating element, a capacitor 198, and the like may be disposed in the mounting region 197.

The motor 170 needs to receive an electrical signal from the circuit board 196, and also removes heat generated from the circuit board 196 through the flow of air generated by the operation of the motor 170. 196 may be disposed adjacent to the motor 170. However, in order to avoid the interference between the circuit device and the motor 170, the unnecessary space is increased so that the motor assembly 100 becomes large.

In the embodiment of the present invention, the motor 170 is provided to be formed to be long in one direction, and the arrangement area 188 may be provided on the same plane. That is, both side portions of the stator 180 formed in the longitudinal direction in one direction may be provided with an arrangement area 188 which is a free space provided so that other components of the motor assembly 100 may be arranged. In the embodiment of the present invention, since the housing 102 has a substantially cylindrical shape or the impeller 130 is provided in a circular shape, the arrangement area 188 may be provided in the shape of a semicircle having an arc of a predetermined interval.

In the mounting area 197 on the circuit board 196, an electric element may be disposed in the placement area 188 of the motor 170 to avoid interference with the placement of the motor 170. In the present embodiment, the capacitor 198 is disposed as an example, but may be disposed in the placement area 188 even in other electrical devices.

Through such a configuration, the motor 170 and the circuit board 196 may be disposed closer to each other, thereby improving space utilization inside the housing 102.

9 is a front view of the motor according to the first embodiment of the present invention, and FIG. 10 is a diagram of the magnetic field flow of the motor according to the first embodiment of the present invention.

The stator 180 may be provided symmetrically such that the pair of stator bodies 182 face each other.

The pair of expansion core portions 185a provided at the ends of the pair of center cores 185 around the rotor 172 may be provided so that the centers of the curved surfaces provided on the inner surfaces thereof are shifted from each other. In detail, a pair of expansion core portions 185a are provided to surround the outer surface of the rotor 172, the inner center of one of the expansion core portions 185a, and the inner surface of the other expansion core portion 185a. The centers are provided so as to be mutually displaced. Through this configuration, the pair of expansion core portions 185a surrounding the rotor 172 are provided to allow the rotor 172 to rotate in any one direction by giving electromagnetic influences of different sizes and directions.

10 is a diagram of the electromagnetic flow through the stator 182 and the rotor 172.

The electromagnetic flow passing through the stator 180 and the rotor 172 is formed between one of the pair of side cores 186 and the center core 185 by a change in polarity due to the rotation of the rotor 172.

Hereinafter will be described the assembly process of the motor assembly 100 according to an embodiment of the present invention.

Referring to FIG. 7, the pair of stator bodies 182 may be coupled to one stator 180 through coupling between the side cores 186 facing each other. At least a part of the stator 180 is covered by the insulator 190 for electrical insulation.

6A and 6B, the expansion core portion 185a and the air gap 185b are formed in the rotor accommodating portion 187a formed on the pair of stators 180 coupled to the insulator 190, and the rotor 172 is formed. It is inserted, and the seating housing 142 is fixed as a module.

In detail, one surface and the other surface of the motor 170 are respectively seated on the front seating portion 154 of the front seating housing 150 and the rear seating portion 164 of the rear seating housing 160, and the motor 170 is mounted on the seating protrusion. The side of is seated.

In addition, the rotor shaft 172a penetrates the through-hole of the seating housing 142 so that the concentricity of the rotor 172 and the stator 180 may coincide even when the motor 170 is seated and coupled to the seating housing 142. .

The front seating housing 150 and the rear seating housing 160 may be coupled to each other by a screw 148, the coupling method is not limited thereto.

Through this process, the motor 170 and the seating housing 142 may be provided as one module.

Referring to FIG. 5, the motor module 140 may be coupled to the mounting hole 126 of the second housing 120. In detail, the body coupling part 152 of the front seating housing 150 may be coupled to the seating hole 126 of the second housing 120.

The impeller 130 may be coupled to the rotor shaft 172a at the front of the motor module 140. In detail, the impeller 130 may be disposed at the impeller seating part 153 of the front seating housing 150.

The first housing 110 may be coupled to the front of the second housing 120. The shroud 112 is provided on the inner side surface of the first housing 110 to form a flow path introduced into the housing 102 together with the impeller 130 and the diffuser.

The capacitor 198 is disposed in the arrangement area 188 of the motor 170 at the rear of the motor module 140, and the circuit board 196 may be coupled so that the motor 170 and the electric element do not interfere with each other. In detail, the circuit coupling unit coupled to the insulator 190 is physically coupled to the circuit board 196, and the coil 195 provided on the motor 170 may be electrically coupled to the circuit board 196. do.

As the motor module 140 is coupled to the housing 102 and the circuit board 196, the motor assembly 100 may be assembled.

11 is a perspective view of a rotor according to a first embodiment of the present invention, Figure 12 is an exploded perspective view of the rotor according to the first embodiment of the present invention.

The rotor 172 may be disposed in the rotor accommodating part 187a of the stator 180. The rotor 172 may be provided to electromagnetically interact with the stator 180 in the rotor accommodating part 187a.

The rotor 172 may include a rotor shaft 172b and a magnet 173.

The rotor shaft 172b is provided to be rotatable about the rotor shaft 172a. One end of the rotor shaft 172b is coupled to the impeller 130 and provided to rotate together with the rotor 172. The rotor shaft 172b may be provided in the shape of a rod. The rotor shaft 172b may rotate while forming a gap 185b between the expansion core part 185a of the stator 180.

The magnet 173 is provided to pass through the rotor shaft 172b. That is, it is provided to be disposed along the circumference of the rotor shaft 172b. Although not limited to the shape and arrangement method of the magnet 173, in the embodiment of the present invention, the magnet 173 is provided in an annular shape, and the rotor shaft 172b is provided in the center of the annular shape.

The rotor 172 may include a support member 174.

The support member 174 is provided to be adjacent to the magnet 173. In detail, the support member 174 may be disposed adjacent to the magnet 173 in the rotor shaft 172a direction. The support member 174 may be provided with a pair, and may be disposed on one side and the other side in the rotor shaft 172a direction of the magnet 173. The support member 174 may include a balancer. That is, a pair of balancers are provided on one side and the other side of the magnet 173, and may be provided to compensate for the eccentricity caused by the rotation of the rotor 172.

The support member 174 is provided to pass through the rotor shaft 172b. That is, it may be provided to be disposed along the circumference of the rotor shaft 172b. The support member 174 is not limited to the shape and arrangement method, but in the embodiment of the present invention, the support member 174 is provided in an annular shape so that the rotor shaft 172b passes through the center of the annular shape.

The support member 174 is a first support member 174a disposed on one side of the magnet 173 along the rotor shaft 172a direction, and a first member disposed on the other side of the magnet 173 along the rotor shaft 172a direction. It may include two support members (174b). Since the support member 174 includes a balancer, the first support member 174a is the same as the first balancer, and the second support member 174b is the same as the second balancer.

The rotor 172 may further include a magnet cover 176.

The magnet cover 176 is formed to surround the outer circumferential surface of the magnet 173. When the rotor 172 rotates at a high speed, durability of the magnet 173 may be scattered and the like. For this reason, the magnet cover 176 is formed to surround the outer circumferential surface of the magnet 173 to improve the durability of the magnet 173.

The magnet cover 176 is not limited as long as it is a material provided to improve durability of the magnet 173, but carbon fiber may be applied in this embodiment. The carbon fiber magnet cover 176 is rolled to cover the outer circumferential surface of the magnet 173 and cured to improve durability of the magnet 173 to withstand rapid rotation.

The magnet cover 176 may be directly rolled on the magnet 173, or the magnet cover 176 may be wound around the round bar-shaped jig to cover the outer circumferential surface of the magnet 173. Between the magnet cover 176 and the magnet 173 can be more firmly fixed through an adhesive.

13A and 13B are perspective views of the support member of the rotor according to the first embodiment of the present invention, and FIG. 14 is a sectional view of the rotor according to the first embodiment of the present invention.

The rotor 172 may include an inner channel 177 provided to allow the adhesive to flow for adhesion of the rotor shaft 172b, the support member 174, the magnet 173, and the like.

The inner channel 177 may include an adhesive channel 178 and a magnet coupling channel 179. The adhesion channel 178 may be included in the support member 174, and the magnet coupling channel 179 may be included in the magnet 173.

The adhesive channel 178 and the magnet coupling channel 179 are provided to be in communication with each other, it is possible to bond each component by injecting an adhesive to the channel to allow the adhesive to flow on the channel. The adhesion channel 178 and the magnet coupling channel 179 may be bent to form a plurality of detailed configurations of the rotor 172. In detail, as described below, the adhesive channel 178 and the magnet coupling channel 179 may be mutually provided such that an adhesive is flowable for adhesion between the support member 174, the magnet 173, and the rotor shaft 172b. While communicating, it may be bent.

The magnet coupling channel 179 is provided with an adhesive flowable for adhesion of the rotor shaft 172b and the magnet 173. The magnet coupling channel 179 is formed by the outer circumferential surface of the rotor shaft 172b and the inner circumferential surface of the magnet 173. The magnet coupling channel 179 may be provided to have an annular flow path so that the adhesive can flow. The magnet 173 and the rotor shaft 172b may be bonded while the magnet coupling channel 179 is solidified after the adhesive is filled.

The magnet coupling channel 179 is formed between the rotor shaft 172b and the magnet 173, and may be formed in a range between one side and the other side of the magnet 173 in the rotor shaft 172b. That is, it is possible to apply the adhesive only to the necessary portion in order to bond the magnet 173 and the rotor shaft 172b, it is possible to increase the manufacturing efficiency and improve the quality of the product.

The adhesive channel 178 is provided to form a flow path for the adhesive to flow between the support member 174 and the magnet 173. The adhesive channel 178 is provided on the support member 174.

The support member 174 may be provided with an inlet 174aa and an outlet 174bb to allow the adhesive to flow out into the channel. The inlet 174aa may be provided on the outer surface of the first support member 174a and the outlet 174bb may be provided on the outer surface of the second support member 174b. Although the number and arrangement of the inlet 174aa and the outlet 174bb are not limited, the present embodiment is provided to correspond to the number of the first channel 178a and the second channel 178b described below.

The adhesion channel 178 may include a first channel 178a provided in the first support member 174a and a second channel 178b provided in the second support member 174b.

The first channel 178a is provided in the first support member 174a so that an adhesive can flow between the first support member 174a and one side of the magnet 173. In detail, the first support member 174a and the first support member 174a are provided to be movable between one side of the magnet 173 facing the first support member 174a. One end of the first channel 178a may be provided to communicate with the inlet 174aa of the first support member 174a. The other end of the first channel 178a may be provided to communicate with the magnet coupling channel 179.

One or more first channels 178a may be provided. When a plurality of first channels 178a are provided, their arrangement is not limited. In this embodiment, the adhesive is uniformly spaced apart in the circumferential direction in the direction of the rotor shaft 172a so as to uniformly flow into the channel. In detail, three first channels 178a are provided, and each of the first channels 178a is disposed at an angle of 120 degrees with respect to the rotor shaft 172a.

The first channel 178a may include an inflow channel 178aa and a first flow channel 178ab.

The inlet channel 178aa is provided to communicate with the inlet 174aa. The inflow channel 178aa may be disposed to penetrate the first support member 174a and may be provided to communicate with the first flow channel 178ab.

The first flow channel 178ab is provided to guide the adhesive introduced into the inflow channel 178aa to the magnet coupling channel 179. One end of the first flow channel 178ab may be provided to communicate with an end of the inflow channel 178aa, and the other end may be provided to communicate with the magnet coupling channel 179.

The first flow channel 178ab may be provided on an inner surface of the first support member 174a facing one side of the magnet 173. The first flow channel 178ab may be provided to form a flow path in the centrifugal direction of the rotor shaft 172a from the end of the inflow channel 178aa to the magnet coupling channel 179.

The shape or arrangement of the first flow channel 178ab is not limited. In the present embodiment, an example is provided on the inner surface of the first support member 174a. However, the magnet 173 may have the same shape. .

The inlet 174aa may be disposed to be spaced apart from the rotor shaft 172b, and the inlet channel 178aa communicating with the inlet 174aa may be provided to be spaced apart from the rotor shaft 172a. In order to reduce the flow resistance of the adhesive, the length of the flow path through which the adhesive moves must be shortened. On the contrary, the length of the flow path must be long to stabilize the coupling between the magnet 173 and the first support member 174a. Therefore, the inlet port 174aa is spaced apart from the rotor shaft 172b and parallel to the rotor shaft 172a to shorten the flow path of the inlet channel 178aa formed between the inlet port 174aa and the first flow channel 178ab. In order to penetrate the first support member 174a, the length of the first flow channel 178ab can be relatively long.

The second channel 178b is provided in the second support member 174b so that the adhesive can flow between the second support member 174b and the other side of the magnet 173. In detail, the second support member 174b and the second support member 174b are provided to be movable between the other side surface of the magnet 173 facing the second support member 174b. One end of the second channel 178b may be provided to communicate with the outlet port 174bb of the second support member 174b. The other end of the second channel 178b may be provided to communicate with the magnet coupling channel 179.

One or more second channels 178b may be provided. When a plurality of second channels 178b are provided, their arrangement is not limited. In this embodiment, the adhesive is uniformly spaced apart in the circumferential direction in the direction of the rotor shaft 172a so as to uniformly flow into the inner channel 177. In detail, three second channels 178b are provided, and each of the second channels 178b is disposed at an angle of 120 degrees with respect to the rotor shaft 172a. The arrangement of the second channel 178b may not correspond to the first channel 178a.

The second channel 178b may include an outlet channel 178ba and a second flow channel 178bb.

The outlet channel 178ba is provided to communicate with the outlet 174bb. The outlet channel 178ba may be disposed to penetrate the second support member 174b and may be provided to communicate with the second flow channel 178bb.

The second flow channel 178bb is provided to guide the adhesive past the first channel 178a and the magnet coupling channel 179 to the outlet channel 178ba. One end of the second flow channel 178bb may be provided to communicate with an end of the outlet channel 178ba, and the other end may be provided to communicate with the magnet coupling channel 179.

The second flow channel 178bb may be provided on an inner surface of the second support member 174b facing one side of the magnet 173. The second flow channel 178bb may be provided to form a radial flow path of the rotor shaft 172a from the magnet coupling channel 179 to the end of the outlet channel 178ba.

The shape or arrangement of the second flow channel 178bb is not limited. In this embodiment, an example is provided on the inner surface of the second support member 174b. However, the magnet 173 may have the same shape. .

The outlet 174bb may be disposed to be spaced apart from the rotor shaft 172b, and the outlet channel 178ba communicating with the outlet 174bb may be provided to be spaced apart from the rotor shaft 172a. In order to reduce the flow resistance of the adhesive, the length of the flow path through which the adhesive moves must be shortened. On the contrary, the length of the flow path must be long to stabilize the coupling between the magnet 173 and the second support member 174b. Therefore, the outlet port 174bb is spaced apart from the rotor shaft 172b and parallel to the rotor shaft 172a to shorten the flow path of the outlet channel 178ba formed between the outlet port 174bb and the second flow channel 178bb. In order to penetrate the second support member 174b, the length of the second flow channel 178bb can be relatively long.

The support member 174 may include a leak preventing groove 175.

The leakage preventing groove 175 is provided to prevent the adhesive flowing through the channel from leaking out of the rotor 172. In addition, the leak-proof groove 175 may be provided so that the adhesive can be accumulated, it is possible to more firmly bond the support member 174 and the magnet 173. The leakproof groove 175 may be disposed to be adjacent to the channel, and may be provided to accumulate in the leakproof groove 175 when the adhesive flowing through the channel leaks from the channel.

The leakage preventing groove 175 may be provided at an adhesive portion in which the support member 174 and the magnet 173 contact each other. The adhesive part may be provided in the shape of a surface as in the embodiment of the present invention, and may be provided to be in surface contact with the magnet 173. Leak prevention groove 175 is formed more concave than the adjacent adhesive portion, and the adhesive can be accumulated in the concave space to improve the adhesion efficiency of the support member 174 and the magnet 173, and also prevent the adhesive from leaking to the outside can do.

The leakage preventing groove 175 may include an inner leakage preventing groove 175a and an outer leakage preventing groove 175b.

A plurality of inner leakage preventing grooves 175a may be provided to be disposed between the plurality of first channels 178a and the second channel 178b. That is, the first support member 174a may be disposed between the plurality of first flow channels 178ab. In addition, the second support member 174b may be disposed between the plurality of second flow channels 178bb.

The inner leakage preventing groove 175a may be formed along the circumferential direction around the rotor shaft 172a and may be provided to have an approximately arc shape. As the inner leakage preventing groove 175a is formed along the circumferential direction to contact the magnet 173 and the support member 174, the rotor 172 may be provided so as not to be disassembled even when the rotor 172 rotates at a high speed. have.

The outer leakage preventing groove 175a may be disposed outside the adhesive channel 178 in the adhesive portion. That is, the first flow channel 178ab or the second flow channel 178bb is formed in the adhesive portion, which is disposed outside the rotor shaft 172a rather than the flow channel, and the adhesive leaks from the channel to the outside. Can be prevented.

The shape of the outer leakage preventing groove 175a is not limited, but in the exemplary embodiment of the present invention, the outer leakage preventing groove 175a may be provided in an annular shape in the adhesive portion to effectively prevent the leakage of the adhesive.

In addition, although not shown in the drawings of the present invention, the outer leakage preventing groove 175a may be provided with an annular ring. The annular ring may be disposed in the outer leakage preventing groove 175a to prevent the adhesive from leaking out between the auxiliary member 174 and the magnet 173.

The manufacturing method of the rotor 172 is demonstrated below.

The magnet 173 and the pair of support members 174 are respectively coupled to the rotor shaft 172b on one side and the other side of the magnet 173.

The pair of support members 174 are provided with an inlet 174aa and an outlet 174bb, respectively, which are connected to the inner channel 177 so that the adhesive flows.

When the adhesive is introduced into the inlet 174aa, the adhesive flows through the inflow channel 178aa and the first flow channel 178ab formed between the first support member 174a and the magnet 173.

The adhesive passing through the first flow channel 178ab passes through the magnet coupling channel 179 formed between the magnet 173 and the rotor shaft 172b and is formed between the magnet 173 and the second support member 174b. Is led to a second flow channel (178bb).

The adhesive passing through the second flow channel 178bb is discharged outward through the outlet channel 178ba through the outlet port 174bb.

In this process, the adhesive is filled in the inner channel 177, and after a predetermined time, the adhesive is cured, and each component is combined.

In addition, when the adhesive passing through the inner channel 177 leaks from the inner channel 177, it is provided in the leak-proof groove 175, it is possible to further strengthen the coupling of the magnet 173 and the support member 174. .

15 is an exploded perspective view of the rotor and the impeller according to the first embodiment of the present invention, Figure 16 is a cross-sectional view of the coupling of the rotor shaft and the impeller according to the first embodiment of the present invention.

The impeller 130 is provided to rotate together with the rotor shaft 172b.

The impeller 130 may include an impeller body 131, a shaft coupling part 133, and a plurality of wings 132.

The impeller body 131 is provided so that its cross-sectional area becomes smaller along the rotor shaft 172a direction, and discharges air introduced in the rotor shaft 172a direction in the radial direction of the rotor shaft 172a as the impeller 130 rotates. It is prepared to be.

The plurality of wings 132 are provided on the impeller body 131 and rotate together with the impeller body 131 to form an air flow. The plurality of wings 132 may be provided on an outer surface of the impeller body 131. In detail, the rotor 172 may be disposed on the rear surface of the impeller body 131, and a plurality of wings 132 may be disposed on the front surface of the impeller body 131 to form an airflow.

The shaft coupling part 133 is provided on the impeller body 131, and the rotor shaft 172b is provided to be coupled to the impeller body 131. A shaft insertion hole 133a is formed in the shaft coupling portion 133 so that the rotor shaft 172b can be inserted therein.

The shaft coupling portion 133 may include a shaft coupling surface 134 corresponding to the outer circumferential surface of the rotor shaft 172b. The inner diameter of the shaft coupling portion 133 formed by the shaft coupling surface 134 is provided to correspond to the outer diameter of the rotor shaft 172b so that the rotor shaft 172b may be pressed into the shaft coupling portion 133.

The method in which the rotor shaft 172b is coupled to the shaft coupling portion 133 is not limited. In the embodiment of the present invention, the rotor shaft 172b is press-fitted into the shaft coupling portion 133 so that the impeller 130 and the rotor shaft are pressed. 172b is provided to be able to operate integrally.

Hereinafter, the motor assembly 200 and the cleaner 51 having the same according to the second embodiment will be described.

The description may be omitted for the configuration overlapping with the description in the above embodiment.

17 is a view of a cleaner according to a second embodiment of the present invention, Figure 18 is a cross-sectional view of a partial configuration of the cleaner according to the second embodiment of the present invention.

The cleaner 51 according to the second embodiment of the present invention is applied to the canister type cleaner 51 unlike the cleaner 51 of the first embodiment. Although the type of the cleaner 51 in the first embodiment and the cleaner 51 in the second embodiment are applied differently, the cleaner 51 is divided for convenience of description and the second to the stick cleaner 51 as in the first embodiment. The motor assembly 200 in the embodiment may be applied, and the motor assembly 200 in the first embodiment may be applied to the canister cleaner 51 as in the second embodiment.

The cleaner 51 in the embodiment of the present invention includes a suction unit 60 and a cleaning base 62.

Between the cleaning main body 62 and the suction unit 60 is connected through the connection hose 70 and the connection pipe 72 so that the suction force generated in the main body can be transmitted to the suction unit 60, the connection hose 70 A handle 74 may be provided between the connector 72 and the user so as to hold it by hand.

The connection hose 70 is preferably formed of an elastic corrugated pipe, one end of which is connected to the main body and the other end of which is connected to the handle 74, so that the suction unit 60 can freely move within a predetermined radius about the main body. The connector 72 is formed to have a predetermined length, one end of which is connected to the suction part 60 and the other end of which is connected to the handle 74 so that the user grasps the handle 74 and the suction part 60. Move it to clean the surface to be cleaned.

A connection hose 70 is connected to the front of the cleaning body 62 so as to receive the sucked air.

The cleaning base body 62 includes a motor assembly 200 and a dust container 80 provided therein. The motor assembly 200 generates power to generate a suction force in the cleaning body 62, and the dust container 80 is disposed upstream of the air flow than the motor assembly 200 and flows in from the suction unit 60. It is designed to filter out dust and dirt in the air.

19 is a perspective view of a motor assembly according to a second embodiment of the present invention, FIG. 20 is a sectional view of a motor assembly according to a second embodiment of the present invention, and FIG. 21 is an exploded view of a motor assembly according to a second embodiment of the present invention. Perspective view.

The motor assembly 200 is provided inside the cleaning main body 62 to generate a suction force.

The motor assembly 200 includes a housing 202, a motor 270 installed inside the housing 202 to generate suction force, and a seating housing 242 to which the motor 270 is fixed in the housing 202. And an impeller 230 provided to rotate on the shaft of the motor 270.

The housing 202 may include a first housing 210, a second housing 220 provided to be coupled to the first housing 210, and a third housing 228 coupled to a rear surface of the second housing 220. Include. The housing 202 may be provided to have a substantially cylindrical shape, but various shapes may be provided without being limited thereto. The first housing 210 and the second housing 220 may be detachably provided in the axial direction of the rotor shaft 272a. The first housing 210 is provided with an air inlet 211 such that air introduced by the motor 270 flows into the housing 202, and the third housing 228 has air introduced into the housing 202. The air outlet 229 is provided to be discharged.

An upper path blocking rib 214 is provided on the upper surface of the first housing 210 to prevent the air sucked into the motor 270 from leaking without being sucked into the air inlet 211. The flow path blocking rib 214 may be provided outside the air suction opening 211 and provided on an upper surface of the first housing 210. At least one flow path blocking rib 214 forms a concentric circle on an upper surface of the first housing 210 around the air inlet 211.

Since the third housing 228 is coupled to the second housing 220 at the rear surface of the second housing 220 coupled to the rear surface of the first housing 210, the air inlet 211 is provided in front of the housing 202. Is provided, the rear may be provided with an air outlet (229). However, the arrangement of the air inlet 211 and the air outlet 229 is not limited.

The first housing 210, the second housing 220, and the third housing 228 are combined to form an air passage 213 extending from the air inlet 211 to the air outlet 229, and the motor ( 270 or the internal space 227 in which the impeller 230 is disposed is formed.

The air passage 213 may include a module passage 213a and an external module passage 213b. Intake of air from the motor assembly 200 is performed by the impeller 230, and the sucked air flows through the air flow path 213. Air introduced into the housing 202 flows into the module flow path 213a flowing into the motor module 240, and an external module flow path 213b passing between the outside of the motor module 240 and the inside of the housing 202. Can flow. The intake air passing through the module flow path 213a can cool the heat generated from the inside of the motor module 240. The suction air passing through the module flow path 213a and the suction air passing through the module outer flow path 213b may cool the heat generated from the circuit board 298 while passing through the circuit board 298.

The first housing 210 may include a shroud 212.

The shroud 212 is provided to correspond to the impeller 230 or the diffuser 222 to be described later, to guide the air introduced into the housing 202 by the motor 270. The shroud 212 is a space formed by the shroud 212 with respect to the axial direction of the rotor shaft 272a so that a flow path is formed widely along the traveling direction of the intake air by the motor 270 from the air inlet 211. This can be arranged to be wider. The shroud 212 guides the air introduced through the air inlet 211 into the housing 202 and may be provided in a shape corresponding to the upper portion of the impeller 230.

An impeller 230 may be provided inside the air inlet 211 of the first housing 210. The impeller 230 is provided to rotate together with the rotor shaft 272a. The impeller 230 may be provided with a plurality of wings 232 for generating a flow of air. Impeller 230 is provided so that the rotation radius of the plurality of wings 232 of the impeller 230 along the direction away from the rotor 272, the air flowing in the direction of the rotor shaft (272a) in accordance with the rotation of the impeller 230 Is provided to be discharged in the radial direction of the rotor shaft (272a). Although an embodiment of the impeller 230 has been described, the shape and arrangement of the impeller 230 is not limited, and if the configuration is provided to flow air, this is satisfied.

The second housing 220 may include a diffuser portion 222. The diffuser portion 222 is provided to increase the flow rate of air flowing by the impeller 230. It is provided to be disposed at the outer side along the radial direction of the impeller 230.

The diffuser portion 222 may be provided in a radial direction with respect to the impeller 230. In detail, it may be formed in a direction extending with respect to the plurality of wings 232 of the impeller 230. The diffuser portion 222 may be formed of a plurality of

ribs

223 and 224, and the plurality of

ribs

223 and 224 may be formed to be spaced apart in a direction extending with respect to the plurality of wings 232. Can be. The plurality of

ribs

223 and 224 are formed to increase the flow rate of the air while guiding the air flowing by the impeller 230. In detail, the diffuser portion 222 and the shroud 212 formed in the first housing 210 form the diffuser flow path 225 to guide the air flowing by the impeller 230 to increase the air flow rate. It is formed to.

The plurality of

ribs

223 and 224 may include a first rib 223 and a second rib 224. The first rib 223 is provided on the same plane as the downstream end of the air flow by the impeller 230, and the second rib 224 is provided with air guided by the first rib 223. It is formed to have a predetermined slope in the direction of the rotor shaft 272a so as to flow along the up and down direction, which is the direction of the rotor shaft 272a in the interior thereof.

The motor module 240 may be provided inside the housing 202. The motor module 240 is provided such that the motor 270 is fixed inside the housing 202 as one module.

The motor module 240 may include a motor 270 and a seating housing 242.

The seating housing 242 may include a front seating housing 250 and a rear seating housing 260 provided to be coupled to the front seating housing 250 with the motor 270 therebetween.

The front seating housing 250 is provided to be fixed to the housing 202. In detail, a hole-shaped seating hole 226 is formed at the center of the second housing 220 so that the front seating housing 250 is coupled, and the front seating housing 250 may be coupled to the seating hole 226. have. It may be fitted and the coupling method is not limited.

The front seating housing 250 may include a front seating housing 251, an impeller seating portion 253, and a front seating portion 254. The front seating housing body 251 may be formed in a substantially disk shape, and the body corresponding to the shape of the seating hole 226 to be coupled to the hole-shaped seating hole 226 of the second housing 220 as described above. The coupling part 252 may be included.

The impeller seating portion 253 is provided so that the impeller 230 is seated at the front of the front seating housing 251. In front of the impeller seat 253 is provided so as to correspond to the shape of the back of the impeller 230 so that the impeller 230 coupled to the rotor shaft 272a does not interfere with the rotation.

The front seat 254 is provided such that the motor 270 is seated at the rear of the front seat housing 251. The front seat 254 is provided so that the stator 280 is seated and fixed so that the center of the rotor 272 rotatably provided is the same as the center of rotation of the impeller 230.

The shape of the front seat 254 is not limited, and in the embodiment of the present invention, the front seat housing 251 is provided to protrude from the front seat housing 251 and the motor 270 to be seated at a predetermined interval. It is formed to be.

Although the arrangement of the front seating portion 254 is not limited, in the embodiment of the present invention, since the stator 280 is formed long in the first direction w1, the front seating portion 254 is formed at each end of the stator 280. Four may be arranged to correspond.

The rear seating housing 260 is provided to be coupled to the front seating housing 250, and the motor 270 is disposed between the front seating housing 250 and the front seating housing 250.

The rear seating housing 260 may include a rear seating housing 261 and a rear seating portion 264. The rear seat housing 261 may be elongated along the first direction w1 in the longitudinal direction of the stator 280 to correspond to the shape of the stator 280.

The front seating housing 250 and the rear seating housing 260 have

screw holes

251b and 261b for coupling, respectively, and are provided to be coupled by screws 248.

The structure in which the motor 270 is fixed inside the front seat housing 250 and the rear seat housing 260 will be described in detail later.

22A and 22B are exploded perspective views of a motor module according to a second exemplary embodiment of the present invention.

At the centers of the front seating housing 250 and the rear seating housing 260, the front through hole 251a and the rear through hole 261a are provided to pass through the rotor shaft 272a. A front bearing 273a and a rear bearing 273b may be disposed in the front through hole 251a and the rear through hole 261a to rotate the rotor shaft 272a, respectively.

The front seating housing 250 may include a front seating housing 251, a front seating portion 254, and a front auxiliary seating portion 255.

The front seating housing 251 is formed in a substantially circular shape.

The front seat 254 is provided to the inside of the front seat housing 251, is provided so that one side of the motor 270 is seated. That is, the front seat 254 may be provided on the rear surface of the front seat housing body 251. In the state where the stator 280 is seated or fixed to the front seat 254, the front through-hole 251a is provided with a plurality of front seats so that the centers of the rotor 272, the impeller 230, and the diffuser 222 coincide with each other. The center portion 254 may be formed.

The front auxiliary seating portion 255 is provided inside the front seating housing 250. Unlike the first embodiment, the motor 270 further includes an auxiliary stator 287, which is provided to allow the auxiliary stator 287 to be seated and is a stable central part of the motor 270 formed in the longitudinal direction. It is provided to be supported by.

The front auxiliary seating portion 255 is formed to protrude from the front seating housing body 251, and since the auxiliary stator 287 is provided with a pair, the front auxiliary seating portion 255 is correspondingly provided with a pair.

The front seating protrusion 256 is formed to surround at least a part of the outer surface of the stator 280, and prevents the motor 270 from shifting in a direction perpendicular to the rotor shaft 272a when the motor assembly 200 is operated. do.

The front seating projection 256 is provided to protrude further from the front seating housing 251 than the front auxiliary seating portion 255 to wrap the auxiliary stator 287 on its inner surface. The front seating protrusion 256 may be provided to correspond to the auxiliary stator 287 together with the front auxiliary seating part 255, and may be provided to cover the outer surface of the auxiliary stator 287 in detail. That is, the front surface of the motor 270 is seated on the front seating part 254 and the front auxiliary seating part 255, and the side of the motor 270 is seated on the front protrusion seating surface 256a of the front seating protrusion 256. Will be. The front seating protrusion 256 may be provided with a front guide surface 256b for guiding the motor 270 to easily seat the front seating portion 254. The front guide surface 256b may be formed at an end of the front seating protrusion 256 to have an inclination of an angle therein, and may be provided to be connected to the front protrusion seating surface 256a.

The rear seating housing 260 may include a rear seating housing 261, a rear seating protrusion 266, and a rear seating portion 264.

The rear seating housing 261 may be formed long along the longitudinal direction of the stator 280 to correspond to the shape of the stator 280.

The rear seating protrusion 266 is formed to protrude forward from the rear seating housing 261 and is provided to support the side of the stator 280. The rear seating protrusion 266, together with the front seating protrusion 256, prevents the motor 270 from shifting in a direction perpendicular to the rotor shaft 272a when the motor assembly 200 is operated.

The rear seating protrusion 266 may include a first rear seating protrusion 266a and a second rear seating protrusion 266b.

The first rear seating protrusion 266a fixes an end portion of the first direction w1 in the longitudinal direction of the stator 280, and the second rear seating protrusion 266b is in a second direction perpendicular to the first direction w1. It is provided to fix the end of (w2). That is, the end of the main stator 281 is fixed to the first rear seating projection 266a, and the auxiliary stator 287 is fixed to the second rear seating projection 266b.

The rear seat 264 may be provided to the inside of the first rear seating projection 266a and the second rear seating projection 266b, and may be disposed so that the other side of the motor 270 is seated and supported. In detail, the rear seat 264 includes a first rear seat 264a provided inside the first rear seat protrusion 266a and a second rear seat 270 provided inside the second rear seat protrusion 266b. 264b.

The rear seating protrusion 266 is formed to be inclined at an angle toward the inside of the protrusion to guide the motor 270 to be easily seated on the first rear seating portion 264a and the second rear seating portion 264b. Guide surface 267b may be included. In detail, the rear surface of the motor 270 is seated on the rear seat 264, and the side surface of the motor 270 is seated on the rear protrusion seat 267a of the rear seat protrusion 266. The rear seating protrusion 266 may be provided with a rear guide surface 267b for guiding the motor 270 to be easily seated on the rear seating portion 264. The rear guide surface 267b may be provided at an end portion of the rear seating protrusion 266 to be inclined at a predetermined angle, and may be provided to be connected to the rear protrusion seating surface 267a.

The body of the rear seat housing 260 may be formed long along the longitudinal direction of the stator 280 to correspond to the shape of the stator 280 described later. Four rear seating projections 266 may be formed to be disposed at positions staggered from the front seating projections 256 of the front seating housing 250. That is, the front seating projections 256 and the rear seating projections 266 may be disposed between each other to more firmly support the motor 270.

The rear seat housing 260 may be provided with a magnet sensor 244.

The magnet sensor 244 is provided on the same coaxial axis as the magnet 245 of the rotor 272, so that the position according to the rotation of the rotor 272 can be grasped. This information is transmitted to a position sensor (not shown) of the circuit board 298, and thus the position control of the rotor 272 can be performed.

The magnet sensor 244 may be disposed to be seated on the sensor bracket 246, and may transmit information to a position sensor (not shown) of the circuit board 298. One end of the sensor bracket 246 may be coupled to the sensor seat 268 provided on the rear surface of the rear seat housing 260, and the other end thereof may be coupled to the circuit board 298. By arranging the magnet sensor 244 without directly positioning the position sensor on the rotor 272, the position control of the rotor 272 can be realized through the addition of a simple structure.

The front seating housing 250 and the rear seating housing 260 have

screw holes

251b and 261b for coupling, respectively, and are provided to be coupled by screws 248. In detail, in the present embodiment, one is provided at each of the two front auxiliary seating parts 255 and one at each of the two second rear seating parts 264b, and the screw 248 is a screw hole of the second rear seating part 264b. 261b is provided to be coupled to the screw hole 251b of the corresponding front auxiliary seating portion 255. That is, the front seating housing 250 and the rear seating housing 260 may be coupled with two screws 248, respectively.

The motor 270 may include a rotor 272 and a stator 280.

The rotor 272 is rotatably provided at the center of the stator 280.

The stator 280 is provided to electromagnetically interact with the rotor 272.

The stator 280 may include a main stator 281 and an auxiliary stator 287.

The main stator 281 may include a main stator body 282 and at least one main stator core 283 provided to extend from the main stator body 282.

The main stator body 282 is provided with a pair, and is disposed in the first direction w1 to face each other with the rotor 272 interposed therebetween. That is, the pair of main stator bodies 282 may be long to face each other. The pair of main stator bodies 282 may be provided to be coupled to each other in the first direction w1 which is a longitudinal direction. That is, the main stator 281 is not provided in a circular shape along the circumferential direction around the rotor 272, but the main stator 281 is provided to surround the rotor 272, but is formed in the first direction w1. The length may be longer than the length formed in the second direction w2 perpendicular to the first direction w1. That is, when the length formed in the first direction w1 of the stator 280 is L1 and the length formed in the second direction w2 is L2, L1 may be larger than L2.

The main stator core 283 includes a center core 284 and side cores 285 provided on the side of the center core 284.

The center cores 284 are provided to face each other with respect to the rotor 272, and a rotor accommodating portion 291 is formed between the center cores 284 so that the rotor 272 is rotatable. The pair of side cores 285 may be provided on both sides of the center core 284, and may be provided in parallel with the center cores 284, respectively.

A stator slot 283a is formed between the center core 284 and the side cores 285. As the coil 299 is wound around the center core 284, the coil 299 is received in the stator slots 283a. At the inner end of the center core 284 adjacent to the rotor 272, a main expansion core portion 284a is formed in which the width of the center core 284 is partially extended. In detail, a main extension core portion 284a is formed at an inner end of the center core 284 facing the rotor 272 to partially extend the width of the center core 284 to surround the rotor 272. do. A gap 284b for rotating the rotor 272 is formed between the inner surface of the main expansion core portion 284a and the outer surface of the rotor 272.

The auxiliary stator 287 is provided to electromagnetically interact with the rotor 272 together with the main stator 281. The auxiliary stator 287 is provided to face each other with the rotor 272 interposed therebetween, and may be disposed in another direction perpendicular to one direction. The auxiliary stator 287 may be provided in a pair, and may be disposed to face each other with the rotor 272 interposed between the pair of main stator bodies 282.

The auxiliary stator 287 may include an auxiliary stator body 288 and at least one auxiliary core 289 provided to extend from the auxiliary stator body 288.

The auxiliary cores 289 are provided to face each other with the rotor 272 interposed therebetween, and may be formed in another direction perpendicular to one direction and shorter than the center cores 284. A rotor accommodating part 291 is formed between the auxiliary cores 289 so that the rotor 272 is rotatable. That is, the rotor accommodating portion 291 may be formed between the pair of center cores 284 and the pair of auxiliary cores 289.

An inner end portion of the auxiliary core 289 adjacent to the rotor 272 is formed with an auxiliary expansion core portion 289a in which the width of the auxiliary core 289 is partially extended. In detail, at the inner end of the auxiliary core 289 facing the rotor 272 side, an auxiliary expansion core portion 289a is formed to partially extend the width of the auxiliary core 289 to surround the rotor 272. do. A gap 284b for rotation of the rotor 272 is formed between the inner surface of the auxiliary expansion core portion 289a and the outer surface of the rotor 272.

The auxiliary stator 287

The main stator 281 and the auxiliary stator 287 may be formed by stacking a pressed steel plate.

The main stator 281 may include a main coupling part 286 formed to be bent outwardly from an end of the side core 285.

The main stator 281 may include a main coupling part 286 provided at an end of the side core 285 to be bent outward. The main coupling portion 286 is provided to increase the strength of the coupling portion when coupled with the auxiliary stator 287 and to stably support the motor 270 in the seating housing 242. That is, the main coupling part 286 is provided to have a thickness thicker than that of the adjacent main stator 281 by combining with the auxiliary stator 287. Through this configuration, the strength of the coupling portion of the main stator 281 and the auxiliary stator 287 may be increased, and the front auxiliary seating portion 255 and the second rear seating portion 264b may be stably supported.

A coupling groove 286b may be formed in the main coupling part 286 to be coupled to the auxiliary stator 287, and a coupling protrusion 288a may be formed in the auxiliary stator 287. In detail, the auxiliary stator 287 may be disposed between the pair of main coupling parts 286 facing each other, and on both sides of the coupling groove 286b and the auxiliary stator 287 provided at each main coupling part 286. The main stator 281 and the auxiliary stator 287 may be coupled by the coupling protrusion 288a provided.

The auxiliary stator 287 may include a contact flange 290 and a fixing groove 288b.

The contact flange 290 extends in one direction from the auxiliary stator body 288 toward the main stator 281 disposed on both sides, and may be provided to be disposed inside the main coupling part 286. The main coupling portion 286 includes a coupling surface 286a that is recessed to allow the contact flange 290 to be seated therein, and the contact flange 290 is convexly provided to correspond to the coupling surface 286a. And a seating surface 290a. Although the engaging surface 286a and the flange seating surface 290a are each concave and convex, the surface may be provided for surface contact for the contact of both components. The engaging surface 286a and the flange seating surface 290a are provided to have a constant slope in one direction and the other direction, so that the auxiliary stator 287 is not easily separated from the main stator 281.

Since the contact flange 290 is seated inside the main coupling part 286, the auxiliary stator 287 may be prevented from moving outward from the main coupling part 286.

The fixing groove 288b is provided at an outer end portion of the auxiliary stator body 288 and is formed to be concave inward of the auxiliary stator body 288. In the fixing groove 288b, the side of the screw 248 disposed when the front seating housing 250 and the rear seating housing 260 are coupled is positioned, and the side of the screw 248 is seated in the fixing groove 288b. Thus, one side of the auxiliary stator 287 is supported.

The insulator 294 is formed of a material having electrical insulation, is formed to surround a part of the stator 280, and is formed to surround the center core 284. The insulator 294 includes an insulator body 295 provided to correspond to the stator 280 body, a center core support 296 provided to correspond to the center core 284 in the insulator body 295, and a center core support part ( And a coil guide portion 297 protruding radially inward at 296.

The insulator 294 may include a body coupling part 295a. The body coupling part 295a is provided at one side of the insulator body 295 and is provided to guide the coil 299 wound on the motor 270 to the circuit board 298. In addition, the body coupling part 295a is provided to be inserted into and fixed to the circuit board 298 so that the motor 270 and the circuit board 298 may be coupled to each other.

The coil 299 is wound over the center core 284 and the center core support 296 with the insulator 294 coupled to the stator 280 body. Although it may be wound over the side core 285 and the insulator 294 surrounding the side core 285, in the embodiment of the present invention, only the portion wound around the center core 284 and the center core support 296 will be described. do.

The insulator 294 may include a core reinforcement portion 295b. The core reinforcement part 295b is provided outside the stator 280 to support the stator 280 up and down. In an embodiment of the present invention, the core reinforcing portion 295b is provided outside the side core 285 and is provided to support the side core 285 up and down. Since the stator 280 is formed by stacking press-formed iron plates, the core reinforcing portion 295b is supported up and down, thereby improving durability of the stator 280.

In this embodiment, the configuration of the flow path guide portion as in the first embodiment is omitted, but may be applied to this embodiment.

As the stator 280 is formed in the first direction w1, an arrangement area 292 may be provided along the circumferential direction of the stator 280 around the rotor 272. That is, the placement area 292 may be provided at a portion perpendicular to the longitudinal direction of the stator 280.

The arrangement area 292 is an area provided on the same plane as the stator 280 and is provided to improve space utilization of the internal space 227 of the motor assembly 200. The arrangement area 292 is formed to have a substantially semi-circular shape, and the configuration of the motor assembly 200 may be arranged in the arrangement area 292, and in the embodiment of the present invention, the capacitor 298b may be arranged. .

The arrangement area 292 may be provided with a pair on both sides of the stator 280, a pair of capacitor 298b may be provided. In an exemplary embodiment of the present invention, four of each of two placement regions 292 may be disposed. The capacitor 298b has a function of flattening a voltage, removing ripple, and the like.

24 is a diagram showing the arrangement relationship between the circuit board and the motor according to the second embodiment of the present invention.

A circuit board 298 may be provided below the motor 270 to transmit an electrical signal to the motor 270. One surface of the circuit board 298 may be provided with a mounting area 298a in which circuit elements are disposed. Circuit elements such as a heating element, a capacitor 298b, and the like may be disposed in the mounting area 298a.

The motor 270 needs to receive an electrical signal from the circuit board 298, and can also remove heat generated by the circuit board 298 through the flow of air generated by the operation of the motor 270, thereby preventing the circuit board ( 298 may be disposed adjacent to the motor 270. However, in order to avoid the interference between the circuit device and the motor 270, the unnecessary space is increased so that the motor assembly 200 becomes large.

In an embodiment of the present invention, the motor 270 is provided to be formed long in one direction, and the arrangement area 292 may be provided on the same plane. That is, both side portions of the stator 280 formed in one longitudinal direction may be provided with an arrangement area 292 which is a free space provided so that other components of the motor assembly 200 may be arranged. In the embodiment of the present invention, since the housing 202 has a substantially cylindrical shape or the impeller 230 is provided in a circular shape, the arrangement area 292 may be provided in the shape of a semicircle having an arc of a predetermined interval.

An electric element may be provided in the mounting area 298a of the circuit board 298, and the electric element may be disposed to overlap the arrangement area 292 of the motor 270 so as to avoid interference with the arrangement of the motor 270. Can be.

In the present embodiment, the capacitor 298b is disposed as an example. However, the capacitor 298b may be disposed in the placement area 292 even in other electrical devices.

Through such a configuration, the motor 270 and the circuit board 298 may be disposed closer to each other, thereby improving space utilization inside the housing 202.

FIG. 25 is a front view of a motor according to a second embodiment of the present invention, and FIG. 26 is a diagram of a magnetic field flow of the motor according to the second embodiment of the present invention.

The stator 280 may be provided symmetrically about the rotor 272.

The pair of main expansion core portions 284a and the pair of auxiliary expansion core portions 289a that form the outer surface of the rotor 272 and the voids 284b around the rotor 272 are respectively provided on the inner surface thereof. The centers of the may be provided to be mutually offset.

In detail, a pair of main expansion core portion 284a and a pair of auxiliary expansion core portions 289a are provided to surround the outer surface of the rotor 272, respectively, which one main expansion core portion 284a or which The inner center of one auxiliary expansion core portion 289a and the inner center of the other main expansion core portion 284a or the other auxiliary expansion core portion 289a are provided so as to be offset from each other.

Through this configuration, the pair of main expansion cores 284a or the pair of auxiliary expansion cores 289a surrounding the rotor 272 may have electromagnetic effects of different sizes and directions, respectively, so that the rotor 272 may It is provided to rotate in one direction.

The

stator bodies

282 and 288 may include a direction check groove 282a provided to check the coupling direction of the stator. In the embodiment of the present invention, the main stator body 282 is applied as an example. The position of the direction confirming groove 282a is not limited, and may be provided only at one side to distinguish the left and right directions of the main stator body 282. As described above, the inner center of one main expansion core portion 284a or one auxiliary expansion core portion 289a and the other main expansion core portion 284a or the other auxiliary expansion core portion 289a. The inner centers of) are formed so as to deviate from each other. That is, one end of the main expansion core portion 284a or the auxiliary expansion core portion 289a is formed closer to the rotor than the other end.

When the pair of

stator bodies

282 and 288 are combined, the left and right directions of the pair are combined so that one end close to the rotor in the main extension core portion 284a or the auxiliary expansion core portion 289a is disposed in the same direction. In this case, starting torque necessary for the initial rotation of the rotor 272 is not generated. Therefore, a pair of

stator bodies

282 and 288 are combined so that the direction check grooves 282a provided in each

stator body

282 and 288 are arranged symmetrically about the rotor 272, and the starting torque required for the initial rotation of the rotor. Can be easily generated. Direction check groove 282a is shown and described in this embodiment, but can be applied to all embodiments of the present invention.

FIG. 26 is a diagram of magnetic field formation formed on the stator 280 and the rotor 272.

The current is supplied to the motor 270, so that the stator 280 and the rotor 272 interact with each other electromagnetically to form a magnetic field. The magnetic field is formed in the stator 280 and the rotor 272 by the change of the polarity by the rotation of the rotor 272.

Hereinafter will be described the assembly process of the motor assembly 200 according to an embodiment of the present invention.

Referring to FIG. 23, a pair of main stator bodies 282 are coupled with a pair of auxiliary stators 287 interposed therebetween. That is, the auxiliary stator 287 is disposed and coupled to each other between the side cores 285 facing each other in the pair of main stator bodies 282, thereby forming a stator 280.

The stator 280 is at least partially covered by an insulator 294 for electrical isolation.

Referring to FIGS. 22A and 22B, the rotor 272 is inserted and the rotor 272 is formed in the rotor accommodating portion 291 formed in the stator 280 coupled to the insulator 294. Seating housing 242 is fixed as a module.

In detail, one side and the other side of the motor 270 are seated on the front seat 254, the front auxiliary seat 255 and the rear seat 264 of the rear seat housing 260 of the front seat housing 250, respectively. The side of the motor 270 is seated on the front seating protrusion 256 and the rear seating protrusion 266.

In addition, the rotor shaft 272a penetrates the through-hole of the mounting housing 242 so that the concentricity of the rotor 272 and the stator 280 coincides with the mounting housing 242 when the motor 270 is seated and coupled. .

The front seating housing 250 and the rear seating housing 260 may be coupled to each other by a screw 248, the coupling method is not limited thereto.

Through this process, the motor 270 and the seating housing 242 may be provided as the motor module 240.

Referring to FIG. 21, the motor module 240 may be coupled to the seating hole 226 of the second housing 220. In detail, the body coupling part 252 of the front seat housing 250 may be coupled to the seating hole 226 of the second housing 220.

The impeller 230 may be coupled to the rotor shaft 272a at the front of the motor module 240. In detail, the impeller 230 may be disposed at the impeller seating portion 253 of the front seating housing 250.

The first housing 210 may be coupled to the front of the second housing 220. A shroud 212 is provided on an inner side surface of the first housing 210 to form a flow path introduced into the housing 202 together with the impeller 230 and the diffuser.

The capacitor 298b may be disposed in the arrangement area 292 of the motor 270 at the rear of the motor module 240, and the circuit board 298 may be coupled so that the motor 270 does not interfere with the electric element. In detail, the circuit coupler coupled to the insulator 294 is physically coupled to the circuit board 298, and the coil 299 provided at the motor 270 is electrically coupled to the circuit board 298. do.

As the motor module 240 is coupled to the housing 202 and the circuit board 298, the motor assembly 200 may be assembled.

27 is a graph relating to the performance of the motor according to the second embodiment of the present invention.

The horizontal axis represents the phase of the counter electromotive force, and the vertical axis represents the magnitude of the counter electromotive force. The dotted line represents the counter electromotive force for the motor 170 having the pair of stator bodies 182 formed in the first direction w1 as in the first embodiment, and the solid line represents the stator 280 as in the second embodiment. Denotes back EMF for a motor having a main stator 281 and an auxiliary stator 287.

When the auxiliary stator 287 is provided, unlike the motor 170 in the first embodiment without the auxiliary stator 287, the counter electromotive force is increased, so that the capacity increase becomes easy. Since the capacity increase becomes easy, the capacity can be increased without increasing the stacking of stators. In other words, the capacity can be increased without increasing the size of the stator. As a result, the size of the motor 270 can be reduced.

Hereinafter, a motor assembly and a cleaner having the same according to the third embodiment will be described.

FIG. 28 is a diagram of a stator according to a third embodiment of the present invention. FIG.

In this embodiment, it is provided to have a stator 380 having a shape different from that of the second embodiment. In this embodiment, the shape and coupling configuration of the stator 380 and the second embodiment are different.

The motor 370 may include a main stator 381 and an auxiliary stator 387.

The auxiliary stator 387 may include an auxiliary stator body 388 and at least one auxiliary core 389 provided to extend from the auxiliary stator body 388.

The auxiliary stator body 388 may be formed to be thicker than the side cores 385 of the adjacent main stator 381 to strengthen the coupling portion. In detail, the outer surface of the auxiliary stator body 388 may be formed to be convex.

The auxiliary core 389 is provided to face each other with the rotor 372 interposed therebetween, and may be formed in another direction perpendicular to one direction and shorter than the center core 384. A rotor accommodating part 391 is formed between the auxiliary cores 389 so that the rotor 372 is rotatable. That is, the rotor accommodating portion 391 may be formed between the pair of center cores 384 and the pair of auxiliary cores 389.

At the inner end of the auxiliary core 389 adjacent to the rotor 372, an auxiliary expansion core portion 389a in which the width of the auxiliary core 389 is partially extended is formed. In detail, at the inner end of the auxiliary core 389 facing the rotor 372 side, an auxiliary expansion core portion 389a is formed to partially extend the width of the auxiliary core 389 to surround the rotor 372. do. A gap 384b for rotating the rotor 372 is formed between the inner surface of the auxiliary expansion core portion 389a and the outer surface of the rotor 372.

The auxiliary stator 387 may include an air barrier. The air barrier is provided to have a great resistance to the flow of the magnetic field, so that the flow of the magnetic field can be changed. This makes the flow of the magnetic field more smooth. In the present embodiment, the air barrier may have a hole shape in the auxiliary stator body 388 and may be provided outside the auxiliary core 389.

The main stator 381 is provided at an end of the side core 385, and a coupling groove 386b may be formed to be coupled to the auxiliary stator 387, and the coupling protrusion 388a may be formed in the auxiliary stator 387. Can be. The main stator 381 and the auxiliary stator 387 may be coupled by inserting the coupling protrusion 388a into the coupling groove 386b.

The main stator body 382, the main stator core 383, the main expansion core portion 384a, the stator slot 383a, the main coupling portion 386, and the arrangement area 392, which have not been described, are the same as described in the above embodiment. Do.

Hereinafter, the motor 470 assembly and the cleaner having the same according to the fourth embodiment will be described.

29 and 30 are perspective views of a motor module according to a fourth embodiment of the present invention, FIG. 31 is a perspective view of a front seating housing according to a fourth embodiment of the present invention, and FIG. 32 is a fourth embodiment of the present invention. 33 is a perspective view of a rear seat housing, FIG. 33 is a view of a motor according to a fourth embodiment of the present invention, and FIG. 34 is a view of an arrangement of a motor and a seating housing according to a fourth embodiment of the present invention.

In this embodiment, the stator 480 has a shape different from that of the third embodiment.

In the present embodiment, the shape of the stator 480 and the coupling configuration of the seating housing 442 are different from those of the third embodiment.

The auxiliary stator 487 may include an auxiliary stator body 488 and at least one auxiliary core 489 provided to extend from the auxiliary stator body 488.

The auxiliary stator body 488 may be provided to have the same width as that of the side core 485 of the main stator 481. In detail, the outer surface of the side core 485 and the outer surface of the auxiliary stator body 488 may be disposed on the same surface.

Unlike the stator 480 in the second and third embodiments, there is no configuration protruding to the side of the stator 480 so that the placement area 492 is larger in the same housing than the stator 480 in the second and third embodiments. Can be formed.

The auxiliary core 489 is provided to face each other with the rotor 472 interposed therebetween, and may be formed in another direction perpendicular to one direction and shorter than the center core 484. A rotor accommodating part 491 is formed between the auxiliary cores 489 so that the rotor 472 is rotatable. That is, the rotor accommodating portion 491 may be formed between the pair of center cores 484 and the pair of auxiliary cores 489.

An inner end portion of the auxiliary core 489 adjacent to the rotor 472 is formed with an auxiliary expansion core portion 489a in which the width of the auxiliary core 489 is partially extended. In detail, at the inner end of the auxiliary core 489 facing the rotor 472 side, an auxiliary extension core portion 489a is formed to partially extend the width of the auxiliary core 489 to surround the rotor 472. do. A gap 484b for rotating the rotor 472 is formed between the inner surface of the auxiliary expansion core portion 489a and the outer surface of the rotor 472.

The main stator 481 may be provided at an end of the side core 485, and a coupling protrusion may be formed to be coupled to the auxiliary stator 487, and a coupling groove 488a may be formed in the auxiliary stator 487. The main stator 481 and the auxiliary stator 487 may be coupled by inserting the coupling protrusion into the coupling groove 488a.

The stator 480 may be fixed by the seating housing 442.

The front seating housing 450 may include a front seating housing 451, a front seating portion 454, and a front auxiliary seating portion 455. The front seat housing body 451 may be formed in a substantially disk shape.

The front seat 454 is provided so that the motor 470 is seated at the rear of the front seat housing 451. The front seat 454 is provided so that the stator 480 is seated and fixed so that the center of the rotor 472 rotatably provided between the stators 480 is disposed in the same manner as the center of rotation of the impeller. The front seat 454 is provided to the inside of the front seat housing 451, is provided so that one side of the motor 470 is seated. That is, the front seat 454 may be provided on the rear surface of the front seat housing 451.

The shape of the front seat 454 is not limited, and in the embodiment of the present invention, the front seat housing 451 is provided to protrude from the front seat housing 451, and the front seat housing 451 and the motor 470 may be seated at a predetermined interval. It is formed to be.

Although the arrangement of the front seat 454 is not limited, in the embodiment of the present invention, since the stator 480 is formed long in the longitudinal direction, four front seat 454 may be formed to correspond to each end of the stator 480. Can be arranged.

The front auxiliary seating portion 455 is provided inside the front seating housing 450. The front auxiliary seating part 455 is provided to allow the part of the auxiliary stator 487 to be seated, and is provided to be stably supported as a center part of the motor 470 formed in the longitudinal direction.

The front auxiliary seating portion 455 is formed to protrude from the front seating housing body 451, and since the auxiliary stator 487 is provided with a pair, the front auxiliary seating portion 455 is also formed to correspond to this pair.

The front seating housing 450 may include a front seating protrusion 456. The front seating protrusion 456 is formed to surround at least a part of the outer surface of the stator 480, and prevents the stator 480 from moving left and right during the operation of the motor 470 assembly to be displaced.

The front seating protrusion 456 is provided to protrude further from the front seating housing 451 than the front seating portion 454 to wrap the main stator 481 on its inner surface. The front seating protrusion 456 may be provided to correspond to the main stator 481 together with the front auxiliary seating part 455, and the front seating protrusion 456 may be provided to cover the outer surface of the main stator 481.

The front seating protrusion 456 extends from the front protrusion seating surface 456a on which the side of the motor 470 is seated, and the front protrusion seating surface 456a, and is inclined at a predetermined angle therein to facilitate the seating of the motor 470. It may include a front guide surface 456b is formed.

The rear seating housing 460 is provided to be coupled to the front seating housing 450, and the motor 470 is disposed between the front seating housing 450 and the front seating housing 450.

The rear seating housing 460 may include a rear seating housing 461, a rear seating portion 464, and a rear seating protrusion 466. The rear seat housing body 461 may be formed long along the longitudinal direction of the stator 480 to correspond to the shape of the stator 480.

The rear seat 464 is provided such that the motor 470 is seated on the front of the rear seat housing 461. The front seat 454 is provided so that the stator 480 is seated and fixed so that the center of the rotor 472 rotatably provided between the stators 480 is disposed in the same manner as the center of the impeller. The rear seat 464 is provided to the inside of the rear seat housing body 461, the other side of the motor 470 is provided to be seated.

The shape of the rear seating portion 464 is not limited, and in the embodiment of the present invention, the rear seating housing 461 is provided to protrude from the rear seating housing 461 and the motor 470 to be spaced apart at a predetermined interval. It is formed to be.

Although the arrangement of the rear seat 464 is not limited, in the embodiment of the present invention, since the stator 480 is formed to be elongated in the longitudinal direction, four rear seat 464 may be formed to correspond to each end of the stator 480. Can be deployed.

The rear auxiliary seating portion 465 is provided to the inside of the rear seating housing 460. The rear auxiliary seating part 465 is provided to allow the part of the auxiliary stator 487 to be seated, and is provided to be stably supported as a center part of the motor 470 formed in the longitudinal direction.

The rear subsidiary seating portion 465 is formed to protrude from the rear seating housing body 461. Since the auxiliary stator 487 is provided with a pair, the rear subsidiary seating portion 465 is also formed to correspond to the pair. .

The rear seating protrusion 466 protrudes from the body of the rear seating housing 460 along the circumference of the rear seating portion 464, and is provided to surround the motor 470 on its inner surface. When the motor 470 and the rear seating protrusion 466 are coupled to each other, the motor 470 is formed to have an angle of inclination in the interior of the rear seating protrusion 466 so as to be easily seated on the rear seating portion 464. The rear guide surface 467b may be formed. In detail, the rear surface of the motor 470 is seated on the rear seating portion 464, and the side surface of the motor 470 is seated on the rear protrusion seating surface 467a of the rear seating protrusion 466. The rear seating protrusion 466 may be provided with a rear guide surface 467b for guiding the motor 470 to easily seat the rear seating portion 464. The rear guide surface 467b may be provided at an end portion of the rear seating protrusion 466 to have an inclination of a predetermined angle, and may be provided to be connected to the rear protrusion seating surface 467a.

The front seating housing 450 and the rear seating housing 460 have

screw holes

451b and 461b for coupling, respectively, and are provided to be coupled by screws 448.

At the centers of the front seating housing 450 and the rear seating housing 460, a front through hole 451a and a rear through hole 461a are provided to allow the rotor shaft 472a to pass therethrough.

The main stator body 482, the main stator core 483, and the main expansion core portion 484a which are not described in the drawings are the same as those described in the previous embodiment.

Hereinafter, the motor assembly and the cleaner according to the fifth embodiment will be described.

In this embodiment, the configuration of the magnet cover 776 is different from that of the first embodiment.

In the first embodiment, the magnet cover 776 is provided to surround the magnet 773 through a hardening process after a rolling process to surround the outer circumferential surface of the magnet 773.

In this embodiment, the magnet cover 776 may include a ribbon cover body 776a.

The cover body may be provided to spirally wound on the outer circumferential surface of the magnet 773. The cover body is spirally wound to become a magnet cover 776 surrounding the outer circumferential surface of the magnet 773. The cover body may be wound to correspond to the length of the magnet 773, and thus the cover body may be variously applied according to the length of the magnet 773.

The cover body may be provided to be wound directly on the outer circumferential surface of the magnet 773, and the magnet cover 776 is manufactured in a state in which the cover body is wound and cured in a round bar-shaped jig, and the cover body is covered on the outer circumferential surface of the magnet 773. It may be arranged to. Between the magnet cover 776 and the magnet 773 can be more firmly fixed through the adhesive.

Hereinafter, a motor assembly and a cleaner having the same according to the sixth embodiment will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 830 and the rotor shaft 872b. Duplicate description of the same configuration as the above embodiment will be omitted.

36 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the sixth embodiment of the present invention.

The impeller 830 includes an impeller body 831, a plurality of wings 832, and a shaft coupling part 833.

The shaft coupling portion 833 may include a shaft coupling surface 834 and a gradient coupling surface 835.

The shaft coupling surface 834 is provided to correspond to the outer circumferential surface of the rotor shaft 872b. The shaft coupling surface 834 is provided to allow the rotor shaft 872b to be press-fitted.

Gradient coupling surface 835 is provided to extend from the shaft coupling surface 834, it may be formed to be gradient. In detail, it is provided to be gradient in a direction away from the rotor shaft 872b.

In other words, the gradient coupling surface 835 is at least partially formed on the inner circumferential surface of the shaft coupling portion 833, and along the insertion direction of the rotor shaft 872b on the inner circumferential surface of the shaft coupling portion 833 so that the inner diameter gradually increases. It is formed to be gradient. Between the outer circumferential surface of the rotor shaft 872b and the gradient coupling surface 835 may be bonded by an adhesive.

Through this configuration, the rotor shaft 872b is coupled to the shaft coupling surface 834 by being press-fitted and adhered to the gradient coupling surface 835 by an adhesive to engage with the shaft coupling portion 833.

The shaft insertion hole 833a which is not described is the same as the description of the above embodiment.

Hereinafter, a motor assembly according to a seventh embodiment and a cleaner having the same will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 930 and the rotor shaft 972b. Duplicate description of the same configuration as the above embodiment will be omitted.

37 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the seventh embodiment of the present invention.

The impeller 930 includes an impeller body 931, a plurality of wings 932, and a shaft coupling portion 933.

The shaft coupling portion 933 includes a deformation preventing unit 936 and a gradient coupling surface 935.

The deformation preventing unit 936 is provided to prevent deformation of the shaft coupling portion 933 when the rotor shaft 972b is coupled to the shaft coupling portion 933. In order for the rotor shaft 972b to be press-fitted to the shaft engaging portion 933, the outer circumferential surface of the rotor shaft 972b and the inner circumferential surface of the shaft engaging portion 933 are formed to substantially coincide, which causes the shaft coupling portion 933 to be press-fitted. ), There is a problem that the inner peripheral surface is deformed.

The deformation preventing unit 936 may be insert-inserted together with the impeller 930 along the inner circumferential surface of the shaft coupling part 933, and may be integrally formed with the impeller 930. The deformation preventing unit 936 may be provided so that at least a part of one end of the shaft coupling portion 933 into which the rotor shaft 972b is inserted in the shaft coupling portion 933 is disposed.

The deformation preventing unit 936 may include a deformation preventing surface 936a corresponding to the outer circumferential surface of the rotor shaft 972b. The rotor shaft 972b is press-fitted to the deformation preventing surface 936a.

The material of the deformation preventing unit 936 is not limited, but may be formed of a metal material to prevent deformation due to the rotor shaft 972b.

Gradient coupling surface 935 is the same as that described in the above embodiment.

Through this configuration, the rotor shaft 972b is press-fitted to the deformation preventing surface 936a of the deformation preventing unit 936 and coupled to the shaft coupling part 933 by being adhered to the gradient coupling surface 935 by an adhesive. do.

The shaft insertion hole 933a and the shaft engagement surface 934 which are not described are the same as the description of the above embodiment.

Hereinafter, a motor assembly according to an eighth embodiment and a cleaner having the same will be described.

This embodiment is different from the ninth embodiment, the structure of the coupling portion of the impeller 1030 and the rotor shaft 1072b. Duplicate description of the same configuration as the above embodiment will be omitted.

38 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the eighth embodiment of the present invention.

The impeller 1030 includes an impeller body 1031, a plurality of wings 1032, and a shaft coupling part 1033.

The shaft coupling portion 1033 includes a deformation preventing unit 1036.

In the present embodiment, compared to the third embodiment, the deformation preventing unit 1036 may be provided to form the whole area along the inner circumferential surface of the shaft coupling portion 1033.

The deformation preventing unit 1036 may be provided to be disposed from one end to the other end of the shaft coupling portion 1033 into which the rotor shaft 1072b is inserted in the shaft coupling portion 1033.

The deformation preventing unit 1036 may include a deformation preventing surface 1036a corresponding to the outer circumferential surface of the rotor shaft 1072b. The rotor shaft 1072b may be pressed into the deformation preventing surface 1036a.

Through this configuration, the rotor shaft 1072b is coupled to the shaft coupling portion 1033 by being press-fitted into the deformation preventing surface 1036a of the deformation preventing unit 1036.

The shaft insertion hole 1033a which is not described is the same as the description of the above embodiment.

Hereinafter, a motor assembly according to a ninth embodiment and a cleaner having the same will be described.

This embodiment differs from the eighth embodiment in the structure of the coupling portion of the impeller 1130 and the rotor shaft 1172b. Duplicate description of the same configuration as the above embodiment will be omitted.

39 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the ninth embodiment of the present invention.

The impeller 1130 includes an impeller body 1131, a plurality of wings 1132, and a shaft coupling part 1133.

The shaft coupling part 1133 includes the deformation preventing unit 1136.

The deformation preventing unit 1136 includes a deformation preventing surface 1136a and a deformation preventing gradient surface 1136b.

The deformation preventing surface 1136a is provided to correspond to the outer circumferential surface of the rotor shaft 1172b and is provided to allow the rotor shaft 1172b to be press-fitted.

The deformation preventing gradient surface 1136b is provided to extend from the deformation preventing surface 1136a and may be formed to be gradient. In detail, it is provided to be gradient in a direction away from the rotor shaft 1172b.

In other words, the deformation preventing gradient surface 1136b is formed at least partially on the inner circumferential surface of the deformation preventing unit 1136, and along the insertion direction of the rotor shaft 1172b on the inner circumferential surface of the deformation preventing unit 1136, the inner diameter gradually increases. It is formed to be gradient. Between the outer circumferential surface of the rotor shaft 1172b and the strain relief gradient surface 1136b may be bonded by an adhesive.

Through this configuration, the rotor shaft 1172b is press-fitted to the deformation preventing surface 1136a and coupled to the shaft coupling part 1133 by being adhered to the deformation preventing gradient surface 1136b by an adhesive.

The shaft insertion hole 1133a which is not described is the same as the description of the above embodiment.

Hereinafter, a motor assembly and a cleaner having the same according to the tenth embodiment will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 1230 and the rotor shaft 1272b. Duplicate description of the same configuration as the above embodiment will be omitted.

The rotor shaft 1272b may include a slip prevention part 1272ba that has been knurled along its outer circumferential surface so as to correspond to the shaft coupling surface 1234 of the shaft coupling portion 1233.

As the rotor shaft 1272b is pressed into the shaft coupling portion 1233, the slip prevention portion 1272ba is coupled to correspond to the shaft coupling surface 1234.

The shaft insertion hole 1233a which is not described is the same as the description of the above embodiment.

Hereinafter, a motor assembly and a cleaner having the same according to the eleventh embodiment will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 1330 and the rotor shaft 1372b. Duplicate description of the same configuration as the above embodiment will be omitted.

The rotor shaft 1372b may include a screw protrusion 1372ba.

The screw protrusion 1372ba is provided to have a screw thread formed along the outer circumferential surface of the rotor shaft 1372b. The screw protrusion 1372ba is provided at one end of the rotor shaft 1372b in the direction in which the screw protrusion 1372ba is inserted into the impeller 1330. The screw protrusion 1372ba may be provided to correspond to the screw groove 1337 to be described later, and may be formed to screw with the screw groove 1313.

The screw protrusion 1372ba may be formed to be stepped with the outer circumferential surface of the adjacent rotor shaft 1372b such that the outer diameter is smaller than the outer circumferential surface of the adjacent rotor shaft 1372b.

The shaft insertion hole 1333a which is not described is the same as that of the above embodiment.

The impeller 1330 may include an impeller body 1331, a plurality of wings 1332, and a shaft coupling part 1333.

The shaft coupling portion 1333 includes a shaft coupling surface 1334 and a screw groove portion.

The screw groove 1335 is provided to correspond to the screw protrusion 1372ba, and the screw groove is formed to couple the threads of the screw protrusion 1372ba. The screw groove portion 1335 may be formed to be stepped with the inner circumferential surface of the adjacent shaft coupling portion 1333 so that an inner diameter thereof is smaller than that of the adjacent shaft coupling portion 1333.

The rotor shaft 1372b may include a shaft stepped surface 1372bb, which is a stepped surface adjacent to the screw protrusion 1372ba, and the impeller 1330 may include an impeller stepped surface 1338, which is a stepped surface adjacent to the screw groove 1335. It may include. As the rotor shaft 1372b is coupled to the impeller 1330, the shaft step surface 1372bb and the impeller 1330 step surface may be formed to face each other. Between the shaft step surface 1372bb and the impeller 1330 step surface can be adhered by an adhesive, it is possible to couple the rotor shaft 1372b and the impeller 1330 in the rotor shaft 1372a direction.

Through this configuration, the rotor shaft 1372b is coupled to the shaft coupling surface 1334 by being press-fitted, and the screw protrusion 1372ba is screwed into the screw groove portion 1357, thereby engaging with the shaft coupling portion 1333. In addition, the adhesive is bonded between the shaft step surface 1372bb and the impeller step surface 1338 by an adhesive to further strengthen the coupling.

Hereinafter, a motor assembly according to a twelfth embodiment and a cleaner having the same will be described.

This embodiment differs from the eleventh embodiment in the structure of the coupling portion of the impeller 1430 and the rotor shaft 1472b. Duplicate description of the same configuration as the above embodiment will be omitted.

42 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the twelfth embodiment of the present invention.

The rotor shaft 1472b may include a screw protrusion 1472ba.

The impeller 1430 may include an impeller body 1431, a plurality of wings 1432, and a shaft coupling part 1333.

The shaft coupling portion 1433 includes a shaft coupling surface 1434 and a nut unit 1439.

The nut unit 1439 is provided to correspond to the screw protrusion 1472ba, and a screw groove is formed to couple the threads of the screw protrusion 1472ba. The nut unit 1439 may be formed to be stepped with the inner circumferential surface of the adjacent shaft coupling portion 1433 such that the inner diameter thereof is smaller than the inner circumferential surface of the adjacent shaft coupling portion 1433.

The nut unit 1439 has a screw groove shape to allow the screw protrusion 1472ba to be coupled thereto, and includes a nut coupling portion 1439a formed on an inner circumferential surface thereof. The nut coupling portion 1439a may be provided to be stepped with the inner circumferential surface of the adjacent shaft coupling portion 1433 so that an inner diameter thereof is smaller than that of the adjacent shaft coupling portion 1433.

The nut unit 1439 may be insert-injected together with the impeller 1430 at the front of the impeller 1430, or may be disposed to be simply screwed with the rotor shaft 1472b.

The rear surface 1439b of the nut unit 1439 and the shaft step surface 1472bb of the rotor shaft 1472b may be formed to face each other. The back surface 1439b of the nut unit 1439 and the shaft step surface 1472bb can be adhered by an adhesive, so that the rotor shaft 1472b and the impeller 1430 can also be coupled in the direction of the rotor shaft 1472a. do.

Through this configuration, the rotor shaft 1472b is coupled to the shaft coupling surface 1434 by being press-fitted, and the screw projection portion 1472ba is screwed to the nut coupling portion 1439a of the nut unit 1439, thereby providing a shaft coupling portion ( 1433). In addition, the bond between the shaft step surface (1472bb) and the back surface (1439b) of the nut unit (1439) by the adhesive can be more firmly bonded.

Hereinafter, a motor assembly and a cleaner having the same according to the thirteenth embodiment will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 1530 and the rotor shaft 1572b. Duplicate description of the same configuration as the above embodiment will be omitted.

The rotor shaft 1572b includes a first shaft 1572ba and a second shaft 1572bb extending in the same longitudinal direction as the first shaft 1572ba.

The second shaft 1572bb may be formed to have a diameter smaller than that of the first shaft 1572ba. The second shaft 1572bb may be formed to be stepped with the first shaft 1572ba. In the present embodiment, the second shaft 1572bb may extend from the end of the first shaft 1572ba to the first shaft 1572ba.

The impeller 1530 includes an impeller body 1531, a shaft coupling part 1533, and a plurality of wings 1532.

The shaft coupling portion 1533 includes a first shaft coupling surface 1534a and a second shaft coupling surface 1534b.

The first shaft coupling surface 1534a is coupled to and seated on the first shaft 1572ba, and the second shaft 1572bb is coupled to and seated on the second shaft coupling surface 1534b. The second shaft coupling surface 1534b may be formed to have an inner diameter smaller than that of the first shaft coupling surface 1534a since the second shaft 1572bb having a diameter smaller than that of the first shaft 1572ba is seated.

The rotor shaft 1572b may include a shaft step surface 1572bc, which is a stepped surface formed between the first shaft 1572ba and the second shaft 1572bb. The impeller 1530 may include an impeller stepped surface 1538, which is a stepped surface formed between the first shaft coupling surface 1534a and the second shaft coupling surface 1534b.

When the rotor shaft 1572b is press-fitted into the shaft coupling portion 1533, the shaft step surface 1572bc and the impeller step surface 1538 may be formed to face each other, and may be bonded to each other by an adhesive. The shaft 1572b and the impeller 1530 can also be coupled in the rotor shaft 1572a direction.

Through such a configuration, the rotor shaft 1572b has a shaft coupling part (1, 2, 5, 5, 5, 5), and the first shaft (1572ba) and the second shaft (1572bb) are respectively pressed into the first shaft coupling surface (1534a) and the second shaft coupling surface (1534b). 1533). In addition, the bond between the shaft step surface (1572bc) and the impeller step surface (1538) by the adhesive can be more firmly bonded.

Hereinafter, a motor assembly according to a fourteenth embodiment and a cleaner having the same will be described.

This embodiment differs from the fifteenth embodiment in the structure of the coupling portion of the impeller 1630 and the rotor shaft 1672b. Duplicate description of the same configuration as the above embodiment will be omitted.

44A and 44B are cross-sectional views illustrating a coupling between a rotor shaft and an impeller according to a fourteenth exemplary embodiment of the present invention.

The rotor shaft 1672b includes a first shaft 1672ba and a second shaft 1672bb. A shaft step surface 1672bc may be formed between the first shaft 1672ba and the second shaft 1672b.

The impeller 1630 includes an impeller body 1631, a shaft coupling part 1633, and a plurality of wings 1632.

The shaft coupling portion 1633 includes a first shaft coupling surface 1634a and a second shaft coupling surface 1634b. An impeller stepped surface 1638 may be formed between the first shaft coupling surface 1634a and the second shaft coupling surface 1634b.

The shaft coupling part 1633 may include a shaft cover 1639 provided at an end of the second shaft coupling surface 1634b. The shaft cover 1639 is provided to block an end of the rotor shaft 1672b, and the adhesive injected between the rotor shaft 1672b and the shaft coupling part 1633 may be provided.

The shaft cover 1639 may include a discharge hole 1639a. The discharge hole 1639a is provided such that the inner space formed by coupling the rotor shaft 1672b to the impeller 1630 and the outer space of the impeller 1630 are in communication with each other.

The discharge hole 1639a is provided to allow the internal air to be discharged when the rotor shaft 1672b is pressed into the shaft coupling part 1633. As the internal air is discharged, the shaft coupling part 1633 and the rotor shaft 1672b may be in close contact with each other. In addition, when the adhesive is injected between the shaft coupling portion 1633 and the rotor shaft 1672b, the internal air can be taken out to improve the adhesive efficiency of the adhesive. The shape and arrangement of the discharge hole 1639a is not limited, but in this embodiment, the discharge hole 1639a is provided to be disposed at the center of the shaft cover 1639.

Hereinafter, a motor assembly and a cleaner having the same according to the fifteenth embodiment will be described.

This embodiment is different from the fifteenth embodiment, the structure of the coupling portion of the impeller 1730 and the rotor shaft (1772b). Duplicate description of the same configuration as the above embodiment will be omitted.

45 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the fifteenth embodiment of the present invention.

The rotor shaft 1772b includes a first shaft 1772ba and a second shaft 1772bb extending in the same longitudinal direction as the first shaft 1772ba.

The second shaft 1772bb may be formed to have a diameter smaller than that of the first shaft 1772ba. The second shaft 1772bb may be formed to be stepped with the first shaft 1772ba. In the present embodiment, the second shaft 1772bb may extend from the end of the first shaft 1772ba to the first shaft 1772ba.

The rotor shaft 1772b may include a shaft stepped surface 1772bc, which is a stepped surface formed between the first shaft 1772ba and the second shaft 1772bb.

The impeller 1730 includes an impeller body 1731, a shaft coupling part 1333, and a plurality of wings 1732.

The shaft coupling unit 1733 may include a shaft coupling surface 1734 corresponding to the outer circumferential surface of the rotor shaft 1772b. The shaft coupling surface 1734 is provided to allow the rotor shaft 1177b to be press-fitted. In detail, the first shaft 1772ba of the rotor shaft 1772b is provided to be press-fitted.

An adhesive may be bonded between the second shaft 1772bb and the shaft coupling surface 1734.

Through this configuration, the rotor shaft 1772b is press-fitted to the shaft coupling surface 1734 by the first shaft 1772ba, and is bonded by an adhesive between the second shaft 1772bb and the shaft coupling surface 1734. And, it can be combined with the shaft coupling portion (1733).

Hereinafter, a motor assembly and a cleaner having the same according to the sixteenth embodiment will be described.

This embodiment differs from the fourteenth embodiment in the structure of the coupling portion of the impeller 1830 and the rotor shaft 1872b. Duplicate description of the same configuration as the above embodiment will be omitted.

46 is a cross-sectional view of the coupling between the rotor shaft and the impeller according to the sixteenth embodiment of the present invention.

The rotor shaft 1872b has a first shaft 1872ba, a second shaft 1872bb extending in the same longitudinal direction as the first shaft 1872ba, and a second shaft 1872bb extending in the same longitudinal direction as the second shaft 1872bb. And a third shaft 1872bc.

A thread is formed on the outer circumferential surface of the third shaft 1872bc, and the nut unit 1839 to be described later is provided to be coupled thereto.

The impeller 1830 includes an impeller body 1831, a shaft coupling part 1833, and a plurality of wings 1832.

The shaft coupling portion 1833 includes a shaft coupling surface 1834 and a nut unit 1839.

The shaft coupling surface 1834 is provided to allow the rotor shaft 1187b to be press-fitted. In detail, the first shaft 1872ba of the rotor shaft 1872b is provided to be press-fitted. An adhesive may be adhered between the second shaft 1872bb and the shaft coupling surface 1834.

The nut unit 1839 is provided to correspond to the third shaft 1872bc, and a screw groove is formed to engage the threads of the outer circumferential surface of the third shaft 1872bc. The nut unit 1839 has a screw groove shape to allow the third shaft to be coupled thereto, and includes a nut coupling portion 1839a formed at an inner circumferential surface thereof. The nut coupling portion 1839a may be provided to be stepped with the inner circumferential surface of the adjacent shaft coupling portion 1833 to have an inner diameter smaller than that of the adjacent shaft coupling portion 1833.

The nut unit 1939 may be insert-injected together with the impeller 1830 at the front of the impeller 1830, or may be disposed to be simply screwed with the rotor shaft 1872b.

Through this configuration, the rotor shaft 1872b has a first shaft 1872ba press-fitted to the shaft coupling surface 1834 and is bonded by an adhesive between the second shaft 1872bb and the shaft coupling surface 1834. As the third shaft 1872bc is screwed to the nut unit 1839, the third shaft 1872bc may be coupled to the shaft coupling part 1833.

Hereinafter, a motor assembly and a cleaner having the same according to the seventeenth embodiment will be described.

This embodiment differs from the fifteenth embodiment in the structure of the coupling portion of the impeller 1930 and the rotor shaft 1972b. Duplicate description of the same configuration as the above embodiment will be omitted.

The rotor shaft 1972b includes a first shaft 1972ba and a second shaft 1972bb extending in the same longitudinal direction as the first shaft 1972ba. The second shaft 1972bb may be formed to have a diameter smaller than that of the first shaft 1972ba. The second shaft 1972bb may be formed to be stepped with the first shaft 1972ba. In the present embodiment, the second shaft 1972bb may be formed extending from the end of the first shaft 1972ba to the first shaft 1972ba. The rotor shaft 1972b may include a shaft stepped surface 1972bc, which is a stepped surface formed between the first shaft 1972ba and the second shaft 1972bb.

Unlike the rotor shaft 1772b in the seventeenth embodiment, the second shaft 1972bb may be disposed on the first shaft 1972ba. In other words, the first shaft 1972ba may be disposed at both ends of the second shaft 1972bb.

The impeller 1930 includes an impeller body 1931, a shaft coupling portion 1933, and a plurality of wings 1932.

The shaft coupling unit 1933 may include a shaft coupling surface 1934 corresponding to the outer circumferential surface of the rotor shaft 1972b. The inner diameter of the shaft coupling portion 1933 formed by the shaft coupling surface 1934 is provided to correspond to the outer diameter of the rotor shaft 1972b so that the rotor shaft 1972b may be pressed into the shaft coupling portion 1933. In detail, the first shaft 1972ba of the rotor shaft 1972b is provided to be press-fitted.

An adhesive may be adhered between the second shaft 1972bb and the shaft coupling surface 1934. The adhesive injected between the second shaft 1972bb and the shaft coupling surface 1934 is disposed in a space sealed by the shaft step surface 1972bc.

Through this configuration, the rotor shaft 1972b is coupled to the first shaft 1972ba by being press-fitted to the shaft coupling surface 1934 and adhered by an adhesive between the second shaft 1972bb and the shaft coupling surface 1934. And, it can be combined with the shaft coupling portion (1933).

Hereinafter, a motor assembly and a cleaner having the same according to the eighteenth embodiment will be described.

This embodiment differs from the first embodiment in the structure of the coupling portion of the impeller 2030 and the rotor shaft 2072b. Duplicate description of the same configuration as the above embodiment will be omitted.

48A and 48B are cross-sectional views illustrating a coupling between a rotor shaft and an impeller according to an eighteenth embodiment of the present invention.

Impeller 2030 and rotor shaft 2072b may be provided to be integrally injected. In detail, the rotor shaft 2072b may be inserted into the rotor shaft 2072b so that the rotor shaft 2072b may be integrally injected when the impeller 2030 is ejected.

The impeller 2030 may include an impeller body 2031, a shaft coupling part 2033, and a plurality of wings 2032.

The rotor shaft 2072b may be provided to correspond to the shaft coupling portion 2033, and may include a plurality of slip preventing grooves 2072ba provided to prevent slippage of the impeller 2030.

The plurality of slip preventing grooves 2072ba are provided in a groove shape along the rotor shaft 2082a direction on the outer circumferential surface of the rotor shaft 2072b, and are spaced apart by a predetermined interval along the circumferential direction. Since the impeller 2030 and the rotor shaft 2072b are integrally injected, the shaft coupling portion 2033 of the impeller 2030 has a shape of an inner circumferential surface having a plurality of convex protrusions so as to correspond to the shapes of the plurality of slip preventing grooves 2072ba. It may include a coupling protrusion surface 2034 having.

Hereinafter, a motor assembly and a cleaner having the same according to the nineteenth embodiment will be described.

This embodiment differs from the eighteenth embodiment in the structure of the coupling portion of the impeller 2030 and the rotor shaft 2072b. Duplicate description of the same configuration as the above embodiment will be omitted.

49A and 49B are cross-sectional views illustrating a coupling between a rotor shaft and an impeller according to a nineteenth embodiment of the present invention.

The rotor shaft 2072b may further include a leak preventing flange 2072bb provided at an end thereof.

Leakage prevention flange (2072bb) is provided to have a larger diameter than the adjacent rotor shaft (2072b), it may be provided at the end of the rotor shaft (2072b). In the injection of the impeller 2030 and the rotor shaft 2082b, an adhesive may be applied to the outer circumferential surface of the rotor shaft 2082b for a more firm coupling, and the adhesive leaking to the outside during the process is the front of the impeller 2030. It is provided to prevent leakage.

Leakage prevention flange (2072bb) may be formed to have a shape of a flange at the end of the rotor shaft (2072b), when configured with a plurality of slip prevention grooves (2072ba) to be adjacent to the plurality of slip prevention grooves (2072ba). Can be prepared.

Leakage prevention flange (2072bb) may include a leak-proof groove (2072bc) is provided on the inner side so that the adhesive leaks to the outside is formed concave along the circumference of the rotor shaft (2072b). Leak prevention groove (2072bc), the rotor shaft (2072b) is formed along the circumference and may be provided to have an annular groove shape around the rotor shaft (2072b).

In this embodiment, the slip preventing groove (2072ba) and the leak-proof flange (2072bb) is configured together, but any one of the two configurations may be applied.

Hereinafter, a motor assembly and a cleaner having the same according to the twentieth embodiment will be described.

Detailed description of the same configuration as that of the first embodiment will be omitted.

50 is a perspective view of a rotor according to a twentieth embodiment of the present invention, Figures 51a, 51b is a perspective view of the auxiliary member of the rotor according to a twentieth embodiment of the present invention.

The rotor 2172 may include a support member 2174.

The support member 2174 is provided to be adjacent to the magnet 173. In detail, the support member 2174 may be disposed adjacent to the magnet 173 in the rotor shaft 172a direction. The support member 2174 may be provided with a pair, and may be disposed on one side and the other side in the rotor shaft 172a direction of the magnet 173. The support member 2174 may include a balancer. That is, a pair of balancers may be provided on one side and the other side of the magnet 173 to compensate for the eccentricity caused by the rotation of the rotor 2172.

The support member 2174 may include an inner support member 2174c and an outer support member 2174d. The inner support member 2174c and the outer support member 2174d may be detachably provided. In detail, the inner support member 2174c and the outer support member 2174d are provided to have the same concentric circle, and the inlet 174aa, the outlet 174bb, and the inner portion are formed by the combination of the inner support member 2174c and the outer support member 2174d. It is provided to form the channel 177.

One of the inner support member 2174c and the outer support member 2174d may include an assembly protrusion 2174ca that protrudes, and the other may include an assembly groove 2174da corresponding to the assembly protrusion 2174ca. . In the present embodiment, the inner support member 2174c includes an assembling protrusion 2174ca, and an assembly groove 2174da is formed in the outer support member 2174d to form the inner support member 2174c and the outer support member 2174d. When combined, both components can be firmly coupled in the circumferential direction.

Description of the inlet 174aa, the outlet 174bb, and the inner channel 177 is the same as in the first embodiment, and thus the description thereof is omitted.

In the above, specific embodiments have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and those skilled in the art may make various changes without departing from the spirit of the technical idea of the invention as set forth in the claims below. .

In addition, since each embodiment is not an independent embodiment, the embodiment is compatible between the configuration of each embodiment, it will be able to be variously changed.

Claims

Stator;

A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator;

It includes; an impeller coupled to the rotor shaft,

The impeller,

Impeller body;

A plurality of wings provided on an outer surface of the impeller body to generate airflow through rotation;

And a shaft coupling portion having a shaft insertion hole into which the rotor shaft is inserted, the shaft coupling portion provided in the impeller body, wherein the rotor shaft is press-fitted so that the impeller and the rotor shaft are integrally operated. Featuring motor assembly.
The method of claim 1,

The shaft coupling portion,

A shaft coupling surface into which the rotor shaft is press-fitted;

And a gradient coupling surface extending from the shaft coupling surface and formed to be gradient so as to gradually increase an inner diameter with respect to an insertion direction of the rotor shaft.
The method of claim 2,

Motor assembly, characterized in that the adhesive between the outer peripheral surface of the rotor shaft and the gradient coupling surface by an adhesive.
The method of claim 1,

The shaft coupling portion,

At least a portion of one end of the shaft coupling part is disposed to prevent deformation of the shaft coupling part when the rotor shaft is coupled, and a deformation preventing unit provided to insert the injection shaft together with the impeller; .
The method of claim 1,

The shaft coupling portion,

And a deformation preventing unit disposed in the entire region of the shaft coupling portion to prevent deformation of the shaft coupling portion when the rotor shaft is coupled, and configured to insert the injection shaft together with the impeller.
The method of claim 4, wherein

The deformation preventing unit,

And a deformation preventing gradient surface formed on at least a portion of the deformation preventing unit and formed to be inclined to widen the inner diameter in contact with the insertion direction of the rotor shaft.
The method of claim 2,

The rotor shaft is,

And a slip prevention part provided on an outer circumferential surface of the shaft coupling surface to have a knurled shape.
The method of claim 1,

The rotor shaft is,

And a screw protrusion provided at an end portion in the insertion direction of the impeller and having a screw thread formed at an outer circumferential surface thereof.

The shaft coupling portion,

And a screw groove portion corresponding to the screw protrusion.
The method of claim 8,

The screw groove portion is formed stepped so that the inner diameter is smaller than the inner peripheral surface of the adjacent shaft coupling portion,

The screw protrusion is formed to be stepped so that the outer diameter is smaller than the outer peripheral surface of the adjacent rotor shaft is motor assembly, characterized in that coupled to the threaded groove.
The method of claim 1,

The rotor shaft is,

And a screw protrusion provided at an end portion in the insertion direction of the impeller and having a screw thread formed at an outer circumferential surface thereof.

The shaft coupling portion,

And a nut unit inserted into the impeller and provided with the screw protrusion.
Stator;

A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator;

It includes; an impeller coupled to the rotor shaft,

The rotor shaft is,

A first shaft;

And a second shaft extending in the same longitudinal direction as the first shaft and formed to have a diameter smaller than that of the first shaft.

The impeller,

Impeller body;

A plurality of wings provided on an outer circumferential surface of the impeller body to generate airflow through rotation;

And a first shaft coupling part in which the first shaft is seated, and a second shaft coupling part in which the second shaft is seated, and a shaft coupling part provided in the impeller body to which the rotor shaft is coupled. Motor assembly.
The method of claim 11,

The shaft coupling portion,

It is provided at the end of the second shaft coupling portion so that the internal air is discharged when the rotor shaft is pressed into the shaft coupling portion, the inner space formed by coupling the rotor shaft to the impeller communicates with the outer space of the impeller. And a shaft cover having an outlet hole provided to block one end of the rotor shaft.
Stator;

A rotor having a rotor shaft and rotatably provided to electromagnetically interact with the stator;

And an impeller having an impeller body, a plurality of wings provided on an outer surface of the impeller body to generate airflow, and a shaft coupling part provided on the impeller body to couple the rotor shaft, and an insert impeller inserted together with the rotor shaft. ,

The rotor shaft is,

And a plurality of slip preventing grooves provided to correspond to the shaft coupling part and provided with grooves formed along a rotational axis direction and spaced apart at regular intervals in a circumferential direction to prevent slippage of the impeller. Motor assembly.
The method of claim 13,

The impeller,

The motor assembly, characterized in that the adhesive is applied to the plurality of slip preventing grooves and the insert is injected together with the rotor shaft.
The method of claim 13,

The rotor shaft is,

A flange-shaped leakage preventing flange provided at an end of the rotor shaft to be adjacent to the plurality of slip preventing grooves and provided to prevent an adhesive applied to the plurality of slip preventing grooves from leaking outwardly; Motor assembly.
The method of claim 15,

The leak prevention flange,

And an leakage preventing groove provided on an inner side of the rotor shaft and recessed along a circumference of the rotor shaft so that the adhesive leaks to the outside.