CN209948889U - Motor, air supply device and dust collector - Google Patents

Abstract

The utility model provides a motor, air supply arrangement and dust catcher, the motor has: a rotor rotatable about a central axis extending vertically; a stator that is radially opposed to the rotor; a motor housing surrounding a lower portion of the stator; and a circuit board disposed below the motor case, the circuit board having a plurality of electronic components disposed therein, the motor case having a motor case through hole formed therein and extending in an axial direction, a first electronic component extending upward from the circuit board and having a longest axial length among the plurality of electronic components being disposed on an upper surface of the circuit board, and at least a part of the first electronic component being accommodated in the motor case through hole.

Description

Motor, air supply device and dust collector

Technical Field

The utility model relates to a motor, air supply arrangement and dust catcher.

Background

Patent document 1 discloses an example of a conventional drive device. The drive device of patent document 1 has a frame member and a circuit board.

The circuit board is fixed to the frame member. The SW element is mounted on the frame member side surface of the circuit board so as to be able to radiate heat to the frame member. Thus, the electronic components can be mounted with higher density than in the case where a heat sink for dissipating heat from the SW element is separately provided, and therefore the drive device can be downsized.

Patent document 1: japanese patent laid-open publication No. 2016-34205

Here, the driving device of patent document 1 has a capacitor. However, the capacitor is mounted on the surface of the circuit board opposite to the frame member. Since the capacitor is a member having a long length in the vertical direction, the vertical length of the entire drive device becomes long.

SUMMERY OF THE UTILITY MODEL

In view of the above circumstances, an object of the present invention is to provide a motor capable of shortening the axial length.

The utility model discloses a motor of mode has: a rotor rotatable about a central axis extending vertically; a stator that is radially opposed to the rotor; a motor housing surrounding a lower portion of the stator; and a circuit board disposed below the motor case, the circuit board having a plurality of electronic components disposed therein, the motor case having a motor case through hole formed therein and extending in an axial direction, a first electronic component extending upward from the circuit board and having a longest axial length among the plurality of electronic components being disposed on an upper surface of the circuit board, and at least a part of the first electronic component being accommodated in the motor case through hole.

In the above aspect, the motor case through-holes are formed in plural numbers, and the first electronic component is housed in at least one of the motor case through-holes.

In the above aspect, the first electronic component is provided in plural, and the plural first electronic components are accommodated in one through hole of the motor case.

In the above aspect, the first electronic component is disposed in plural, and the plural first electronic components are accommodated in the different motor case through holes, respectively.

In the above aspect, an outer edge of one of the motor case through holes has a shape along an outer edge of the plurality of first electronic components in a plan view.

In the above aspect, the first electronic component has a cylindrical shape extending in the axial direction, and an outer edge of one of the motor case through holes has two circular arc portions along the outer edge of the first electronic component and a curved portion connecting the circular arc portions and protruding inward, as viewed in plan.

In the above aspect, the stator includes coil portions each formed by winding a winding around a plurality of teeth arranged in a circumferential direction and extending in a radial direction, and the upper end of the first electronic component is arranged above a lower end of the coil portion and between the coil portions adjacent to each other in the circumferential direction.

In the above aspect, the motor case through hole may be formed in a plurality at equal intervals in the circumferential direction, the circuit board may be fixed to the motor case at a plurality of fixing portions arranged at equal intervals in the circumferential direction, and the number of the plurality of fixing portions may be a divisor of the number of the motor case through holes.

In the above aspect, the motor housing may have a rib disposed around the motor housing through hole and protruding in the axial direction.

In the above aspect, the rib protrudes downward.

According to the utility model discloses a motor can shorten axial length.

The utility model discloses an air supply arrangement of mode has: the above-mentioned motor; an impeller fixed to the rotor and rotatable about the center axis; and an impeller housing that houses the impeller.

In the above aspect, the motor housing includes a motor housing communication hole that communicates an inside of the impeller cover with an inside of the motor housing.

The utility model discloses a dust catcher of mode has foretell air supply arrangement.

Drawings

Fig. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention.

Fig. 2 is a perspective view of an air blower according to an exemplary embodiment of the present invention as viewed from above.

Fig. 3 is a perspective view of an air blower according to an exemplary embodiment of the present invention as viewed from below.

Fig. 4 is a bottom view of the air blowing device according to the exemplary embodiment of the present invention.

Fig. 5 is a longitudinal sectional view of an air blowing device according to an exemplary embodiment of the present invention.

Fig. 6 is an exploded perspective view showing a state in which a part of the upper side of the air blowing device is exploded.

Fig. 7 is an exploded perspective view showing a state in which a lower part of the air blowing device is partially exploded.

Fig. 8 is a perspective view showing a state where the lower case and the spacer are viewed from below.

Fig. 9 is a top cross-sectional view taken at the position of the lower case of the motor.

Fig. 10 is a perspective view of the lower case as viewed from below.

Fig. 11 is a perspective view of the spacer as viewed from above.

Fig. 12 is a longitudinal sectional perspective view of the spacer cut with section B-B shown in fig. 11.

Fig. 13 is a plan view of the spacer as viewed from above.

Fig. 14 is a perspective view of the blower device when it is shipped from the factory, as viewed from below.

Fig. 15 is a bottom view of the blower device when the blower device is mounted on the vacuum cleaner.

Fig. 16 is a plan view of the circuit board as viewed from above.

Fig. 17 is a perspective view showing a partial structure of a motor of an embodiment using a capacitor of a modification.

Description of the reference symbols

1: an air supply device; 2: an impeller housing; 21: an upper cover; 22: a lower cover; 3: an impeller; 4: a bushing; 5: a motor; 6: a motor housing; 61: an upper housing; 62: a lower housing; 621B (H1-H3): a motor housing through hole; 7; a rotor; 70; a shaft; 71: a magnet; 72: a first spacer; 73: a second spacer; 8A, 8B: a bearing; 9: a stator; 91: a stator core; 92: an upper insulating member; 93: a lower insulating member; 94: a coil section; 941A, 941B: a wire; 10: a spacer; 101: a spacer base; 102A, 102B: a spacer arm portion; 11: a circuit board; c1, C2: a capacitor; b1, B2: a screw; l1, L2, L11, L12: and (7) leading wires.

Detailed Description

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings. In the present specification, a direction in which the central axis of the air blowing device extends is referred to as "vertical direction" or "axial direction", a direction perpendicular to the central axis of the air blowing device is referred to as "radial direction", and a direction along an arc centered on the central axis of the air blowing device is referred to as "circumferential direction". However, the above-described "vertical direction" is not limited to the direction of the air blowing device when actually incorporated in the apparatus.

In the present specification, the shape and positional relationship of the respective portions will be described with reference to a direction toward the floor surface as "downward" and a direction away from the floor surface as "upward" in the vacuum cleaner. These directions are names used for explanation only, and do not limit the actual positional relationship and directions. Further, "upstream" and "downstream" respectively indicate upstream and downstream in the flow direction of the air sucked from the air intake portion when the air blowing device is driven.

<1. integral Structure of vacuum Cleaner >

Here, a vacuum cleaner according to an exemplary embodiment of the present invention will be described. Fig. 1 is a perspective view of a vacuum cleaner according to an embodiment of the present invention. A vacuum cleaner 100 shown in fig. 1 is a so-called stick type electric vacuum cleaner, and the vacuum cleaner 100 includes a housing 102 having an air suction unit 103 and an air discharge unit 104 opened on a lower surface and an upper surface, respectively. A power supply line (not shown) is led out from the back surface of the case 102. The power cord is connected to a power outlet (not shown) provided on a side wall surface of a room, and supplies electric power to the vacuum cleaner 100. Further, the vacuum cleaner 100 may be a so-called robot type, canister type, or hand-held type electric vacuum cleaner.

An air passage (not shown) connecting the air intake unit 103 and the air exhaust unit 104 is formed in the case 102. A dust collecting unit (not shown), a filter (not shown), and the air blowing device 1 are arranged in this order from the upstream side toward the downstream side in the air passage. The blower 1 includes an impeller described later. Dust such as dust contained in the air flowing through the air passage is blocked by the filter and collected in the dust collecting unit formed in a container shape. The dust collecting unit and the filter are configured to be detachable from the case 102.

A grip 105 and an operation unit 106 are provided on the upper portion of the case 102. The user can move the vacuum cleaner 100 by holding the grip 105. The operation unit 106 includes a plurality of buttons 106a, and the operation setting of the cleaner 100 is performed by operating the buttons 106 a. For example, the blower 1 is instructed to start driving, stop driving, change the rotation speed, and the like by operating the button 106 a. The suction unit 103 is connected to a downstream end (upper end in the drawing) of the rod-like suction pipe 107. At the upstream end of the suction pipe 107, a suction nozzle 110 is detachably attached to the suction pipe 107. Dirt on the floor surface F is sucked into the suction duct 107 through the suction nozzle 110.

<2 > integral Structure of air blowing device

Next, the overall configuration of the air blowing device according to the exemplary embodiment of the present invention will be described. Fig. 2 is a perspective view of the air blowing device 1 according to the exemplary embodiment of the present invention as viewed from above. Fig. 3 is a perspective view of the air blower 1 according to the exemplary embodiment of the present invention as viewed from below. Fig. 4 is a bottom view of the air blower 1 according to the exemplary embodiment of the present invention. Fig. 5 is a longitudinal sectional view of the air blowing device 1 according to the exemplary embodiment of the present invention. Fig. 5 is a view of a state taken along line a-a in fig. 4.

The blower 1 includes an impeller housing 2, an impeller 3, and a motor 5. In the present embodiment, the air blowing device 1 further includes a liner 4. The impeller 3 is rotationally driven around the center axis C by the motor 5, and air is sucked into the impeller shell 2 from above. A part of the sucked air is discharged to the outside from the circumferential surface of the impeller cup 2 extending in the circumferential direction. Another part of the sucked air is sucked into the motor case 6 of the motor 5 and discharged downward from the motor case 6.

<2.l regarding impeller shroud >

Here, details of the impeller cup 2 will be described together with fig. 6. Fig. 6 is an exploded perspective view showing a state in which a part of the upper side of the air blowing device 1 is exploded.

The impeller cup 2 has an upper cup 21 and a lower cup 22. The upper cover 21 has a substantially cylindrical shape with a lid. The upper cover 21 has an air inlet 211 at an upper end thereof. The radially inner surface of the air inlet 211 is curved radially inward. A portion above the inlet 211 is located above the upper end of the impeller 3. In the vacuum cleaner 100, the air blowing device 1 is disposed such that the air inlet 211 faces downward (fig. 1).

The lower cover 22 is a cover member having a circular shape in a cross section in a plan view, and is disposed below the upper cover 21. The lower cover 22 has a projecting piece 221 projecting downward at a radially outer edge portion. A plurality of the protruding pieces 221 are arranged at equal intervals in the circumferential direction. Some of the plurality of projecting pieces 221 have claw portions 221A formed to project radially outward.

The upper cover 21 has a hook portion 212 formed to protrude downward at a radially outer edge portion. The plurality of hook portions 212 are arranged at equal intervals in the circumferential direction and each have a substantially U shape. The hook portions 212 are engaged with the claw portions 221A, whereby the upper cover 21 is fixed to the lower cover 22 by snap-fit. The impeller 3 is disposed in an internal space of the impeller casing 22 formed in a state where the upper casing 21 is fixed to the lower casing 22. That is, the impeller shroud 22 houses the impeller 3.

<2.2 regarding impeller >

Next, the structure of the impeller 3 will be described with particular reference to fig. 6. The impeller 3 is made of, for example, a metal member. The impeller 3 has a shroud 31, a main plate 32, and a plurality of blades 33.

The vanes 33 are interposed between the main plate 32 and the shroud 31. The plurality of blades 33 are arranged in the circumferential direction.

The shroud 31 has an impeller inlet 31A as an opening, and connects upper end portions of the plurality of blades 33. The impeller inlet 31A is circular in plan view. The main plate 32 is formed in a radially expanded disk shape by connecting the lower end portions of the plurality of blades 33.

The vane 33 is a plate-like member that stands in the vertical direction and extends from the radially inner side toward the outer side. The radially inner ends of the blades 33 are located on the front side in the rotation direction of the impeller 3 with respect to the radially outer ends of the blades 33 in plan view. Thereby, the blade 33 is curved so as to protrude forward in the rotation direction.

The main plate 32 is fixed to an upper end portion of a shaft 70, which will be described later, of the motor 5 via a bush 4. As described later, the shaft 70 is included in the rotor 7. The impeller 3 rotates about the center axis C by the rotation of the rotor 7. That is, the impeller 3 is fixed to the rotor 7 and is rotatable about the center axis C.

When the impeller 3 is rotated about the center axis C by the motor 5, air is sucked from above through the impeller air inlet 31A toward the blades 33, and the sucked air is guided radially outward by the blades 33 and the main plate 32 and blown radially outward of the impeller 3. The air blown out from the impeller 3 is discharged in accordance with a path described later.

<3 > regarding the overall structure of the motor

As described above, the blower 1 includes the motor 5 that drives the impeller 3 to rotate, and here, the detailed configuration of the motor 5 will be described. The motor 5 has a motor housing 6, a rotor 7, a stator 9, and a circuit board 11. In the present embodiment, the motor 5 further includes bearings 8A and 8B and a spacer 10.

<3.1 about Motor housing >

The motor housing 6 has an upper housing 61 and a lower housing 62. As shown particularly in fig. 6, the upper case 61 has a covered cylindrical shape. A plurality of screw holes 611A are arranged at equal intervals in the circumferential direction on the upper surface of the cover portion 611 of the upper case 61. A plurality of screw receiving portions 222 are arranged at equal intervals in the circumferential direction on the upper surface of the lower cover 22. The lower cover 22 is fixed to the upper case 61 by receiving the screw B1 in the screw receiving portion 222 and fixing the screw to the screw hole 611A. The upper case 61 is disposed below the lower cover 22.

The upper case 61 has a plurality of motor case communication holes 612 at an upper end portion of the side circumferential surface extending in the circumferential direction. The motor housing communication holes 612 are arranged at equal intervals in the circumferential direction, and penetrate the upper housing 61 in the radial direction and the vertical direction. In a state where the lower cover 22 is fixed to the upper case 61, the protruding piece portion 221 is disposed in the motor case communication hole 612. The lower cover 22 has a vent hole 223 (fig. 5) penetrating in the vertical direction on the radial inner side of the protruding piece portion 221. The inside of the impeller cover 2 communicates with the inside of the upper housing 61 via the vent hole 223 and the motor housing communication hole 612. That is, the motor housing 6 has a motor housing communication hole 612 that communicates the inside of the impeller cover 2 with the inside of the motor housing 6.

In addition, in a state where the lower cover 22 is fixed to the upper case 61, the exhaust port S1 (fig. 2) penetrating in the radial direction is constituted by a portion between the circumferentially adjacent motor case communication holes 612 in the upper case 61 and a space between the circumferentially adjacent protruding piece portions 221 in the lower cover 22. When the impeller 3 is driven by the motor 5 to rotate in the circumferential direction, a part of the air blown radially outward from the impeller 3 passes through the exhaust port S1 and is discharged to the outside. At this time, another part of the air blown out from the impeller 3 passes through the air hole 223 and the motor housing communication hole 612 and is sucked into the upper housing 61. This enables the interior of the upper case 61 to be cooled.

Here, fig. 7 is an exploded perspective view showing a state in which a lower part of the blower device 1 is partially exploded. As shown in fig. 7, the lower case 62 is formed by expanding in the radial direction. The lower housing 62 has a plurality of motor housing through holes 621B, details of which will be described later.

The lower case 62 is fixed to an opening portion of the upper case 61 that opens downward. The rotor 7, the bearings 8A and 8B, and the stator 9 are housed in an internal space of the motor case 6 surrounded by the upper case 61 and the lower case 62. The lower case 62 covers the lower side of the stator 9. That is, the motor housing 6 surrounds the lower portion of the stator 9.

<3.2 concerning rotor >

As shown in fig. 5, the rotor 7 includes a shaft 70, a magnet 71, a first spacer 72, and a second spacer 73. The shaft 70 is a rod-shaped member extending in the vertical direction. The shaft 70 is supported by the bearings 8A and 8B to be rotatable about the center axis C. The bearing 8A is housed in a first bearing housing portion 611B (fig. 6), and the first bearing housing portion 611B is formed by projecting upward from the lid portion 611 of the upper case 61. As shown in fig. 7, the lower case 62 includes a bottom plate 621 and a second bearing housing 622. The second bearing receiving portion 622 is formed to protrude downward from the center of the bottom plate portion 621. The bearing 8B is located below the bearing 8A and is housed in the second bearing housing 622.

In the present embodiment, the bearings 8A and 8B are configured as ball bearings, but are not limited thereto, and may be configured as sleeve bearings, for example.

The magnet 71 is cylindrical and fixed to the shaft 70. The first spacer 72 is sandwiched between the bearing 8A and the magnet 71 in the vertical direction, and is fixed to the shaft 70. The second spacer 73 is disposed below the magnet 71, and is fixed to the shaft 70 with the magnet 71 interposed therebetween in the vertical direction with respect to the first spacer 72.

The shaft 70, the magnet 71, the first spacer 72, and the second spacer 73 are integrally rotatable around the center axis C. That is, the rotor 7 is rotatable about a central axis C extending vertically.

<3.3 regarding stator >

Next, the structure of the stator 9 will be explained. As shown in fig. 5, the stator 9 includes a stator core 91, an upper insulator 92, a lower insulator 93, and a plurality of coil portions 94.

The stator core 91 is formed by laminating electromagnetic steel plates in the vertical direction. The stator core 91 has an annular core back and a plurality of teeth. The plurality of teeth are portions radially extending from the inner peripheral surface of the core back portion toward the radially inner side. The teeth are substantially T-shaped when viewed from above. That is, the teeth are constituted by a portion extending in the radial direction and a portion expanding from the radially inner tip portion of the portion to both circumferential sides.

An upper insulator 92 made of an insulating material is fixed to the stator core 91 so as to cover the upper surface and the side surfaces of the stator core 91. In the present embodiment, the upper insulator 92 is formed of a plurality of insulators divided in the circumferential direction. A lower insulator 93 made of an insulating material is fixed to the stator core 91 so as to cover the lower surface and the side surfaces of the stator core 91. In the present embodiment, the lower insulator 93 is formed of a plurality of insulators divided in the circumferential direction. Further, the upper insulator and the lower insulator may be each configured as one member.

The coil portion 94 is formed by winding a wire around a portion of the upper insulator 92 covering the teeth and a portion of the lower insulator 93 covering the teeth. That is, the coil portion 94 is provided for each tooth.

The magnet 71 is located radially inward of the teeth, and radially faces the teeth with a gap therebetween. That is, the stator 9 and the rotor 7 are radially opposed.

<4 > regarding circuit board and spacer >

Next, details of the circuit board 11 and the spacer 10 will be explained mainly with reference to fig. 7. Since the spacer 10 is located at a lower position than the lower case 62. That is, the spacer 10 is disposed below the stator 9. The circuit board 11 is disposed below the spacer 10.

In other words, the motor 5 includes the motor case 6 surrounding the lower side of the stator 9 and disposed above the spacer 10.

Here, the bottom plate portion 621 of the lower case 62 has a plurality of screw holes 621A formed at equal intervals in the circumferential direction. The circuit board 11 and the spacer 10 are fixed to the motor case 6 by passing a screw B2 through the circuit board 11 and the spacer 10 from below and fixing the screw to the screw hole 621A.

<4.l regarding circuit boards >

Here, the circuit board 11 will be described more specifically. A plurality of electronic components including capacitors C1 and C2 are mounted on the upper surface of the circuit board 11. A plurality of electronic components are also mounted on the lower surface of the circuit board 11. That is, the circuit board 11 is disposed below the motor case 6, and a plurality of electronic components are disposed.

The capacitors C1, C2 extend upward from the upper surface of the circuit board 11, and have the longest axial length among the plurality of electronic components mounted on the circuit board 11. That is, the first electronic component (capacitors C1, C2) extending upward from the circuit board 11 and having the longest axial length among the plurality of electronic components is arranged on the upper surface of the circuit board 11. The first electronic component having the longest axial length is not limited to a capacitor, and may be, for example, an IC package, a transformer, or the like.

A plurality of motor case through holes 621B are formed in the bottom plate portion 621 of the lower case 62. The motor housing through holes 621B penetrate in the axial direction and are arranged at equal intervals in the circumferential direction. That is, the motor housing 6 is provided with a motor housing through hole 621B penetrating in the axial direction.

The capacitors C1 and C2 extend upward from the upper surface of the circuit board 11 through a space where the spacer 10 is not disposed. As shown in fig. 5, the upper ends of the capacitors C1, C2 are disposed in the motor case through hole H1 (fig. 7) of the motor case through holes 621B. Fig. 3 also shows a state in which some of the capacitors C1 and C2 are disposed in the motor case through hole H1.

That is, the capacitors C1 and C2 are radially opposed to the bottom plate 621 but do not reach the inside of the motor case 6. However, the capacitors C1 and C2 may extend from below to above through the motor case through hole H1 to reach the inside of the motor case 6. That is, at least a part of the first electronic components (capacitors C1, C2) is accommodated in the motor case through hole H1.

With this configuration, the axial length of the motor 5 can be shortened. That is, the axial length of the motor 5 can be shortened as compared with a case where the first electronic component is disposed on the lower surface of the circuit board 11 or a case where the first electronic component is disposed on the upper surface of the circuit board 11 and the upper end of the first electronic component is disposed below the motor case 6.

Here, fig. 8 is a perspective view showing a state where the lower case 62 and the spacer 10 are viewed from below. As shown in fig. 8, motor case through holes H1 to H3 are formed as motor case through holes 621B in the bottom plate portion 621. The one lead 941A drawn out from the one coil portion 94 is inserted downward through the motor case through hole H2 and held by the spacer 10. The two lead wires 941B drawn out from the two coil portions 94 are inserted downward through the motor case through hole H3 and held by the spacer 10.

The capacitors C1 and C2 are accommodated in the motor case through hole H1 while avoiding the lead wires 941A and 941B. Therefore, the capacitors C1 and C2 are not accommodated in the motor case through holes H2 and H3. That is, the motor case through holes 621B are formed in plural, and the first electronic components (C1, C2) are not accommodated in at least one (H2, H3) of the motor case through holes 621B. This can reduce the weight of the motor case 6 by increasing the number of the motor case through holes 621B. Further, since the air passes through the motor case through holes H2 and H3 that do not house the first electronic component, the inside of the motor case 6 can be efficiently cooled.

In particular, in the present embodiment, by providing the motor housing communication hole 612, air blown out from the impeller 3 as the impeller 3 is rotationally driven is drawn into the inside of the motor housing 6 through the motor housing communication hole 612. That is, the outside air is taken into the motor case 6 by the rotation of the impeller 3, and the inside of the motor case 6 and the first electronic components (C1, C2) can be efficiently cooled. Further, the air taken into the motor case 6 passes through the motor case through holes H2 and H3 that do not house the first electronic components (C1 and C2), whereby the inside of the motor case 6 can be efficiently cooled. The air passing through the motor case through holes H2 and H3 is directed toward the circuit board 11, and various electronic components disposed on the circuit board 11 can be efficiently cooled. In particular, the FET and the like disposed on the circuit board 11 generate a large amount of heat, and are preferably able to be efficiently cooled.

The two capacitors C1 and C2 are accommodated in one motor case through hole H1. That is, a plurality of first electronic components (C1, C2) are arranged, and a plurality of first electronic components (C1, C2) are accommodated in one motor case through hole H1. This ensures the motor case through holes H2 and H3 for cooling the inside of the motor case 6. Further, by housing the plurality of first electronic components (C1, C2) in one motor case through hole H1, the first electronic components can be collectively arranged in a specific region of the circuit board 11, and therefore, it is easy to arrange other electronic components on the circuit board 11. For example, in addition to the capacitors C1 and C2, one capacitor may be provided and may be accommodated in the motor case through hole H2.

The capacitor C1 may be accommodated in the motor case through hole H1, and the capacitor C2 may be accommodated in the motor case through hole H2. That is, a plurality of first electronic components (C1, C2) may be arranged, and the plurality of first electronic components may be housed in the different motor case through holes H1, H2, respectively. Accordingly, the portions of the motor case through holes H1 and H2 around which air passes through the first electronic components (C1 and C2) are ensured, and the first electronic components (C1 and C2) can be efficiently cooled.

Here, fig. 9 is a top cross-sectional view taken at the position of the lower case 62 of the motor 5, and is a view seen from above. The inner edge of the bottom plate 621 constituting the motor case through hole H1 that houses the capacitors C1 and C2 has a shape that follows the circular outer edge of the capacitors C1 and C2 in a plan view. The capacitors C1, C2 have a cylindrical shape extending in the axial direction.

More specifically, the inner edge of the bottom plate 621 constituting the motor case through hole H1 has arc portions 6211A, 6211B and bent portions 6212A, 6212B in plan view. The arc portions 6211A, 6211B are along the outer edges of the circular shapes of the capacitors C1, C2. The bending portions 6212A, 6212B are bent so as to protrude opposite to each other in the radial direction.

That is, the outer edge of the single motor case through hole H1 has a shape that is along the outer edges of the plurality of first electronic components (C1, C2) in plan view. This allows the plurality of first electronic components (C1, C2) to be housed in the motor case through hole H1, and prevents the motor case through hole H1 from being unnecessarily enlarged, thereby preventing a reduction in rigidity of the motor case 6.

The first electronic components (C1, C2) have a cylindrical shape extending in the axial direction, and the outer edge of one motor case through hole H1 has two circular arc portions 6211A, 6211B along the outer edge of the first electronic component and bent portions 6212A, 6212B that connect the circular arc portions 6211A, 6211B to each other and protrude inward when viewed in plan. This can suppress a decrease in rigidity of the motor case 6 when the first electronic component such as a capacitor is housed. The direction in which the bending portions 6212A, 6212B protrude is not limited to the radial direction as long as the direction narrows the inside of the outer edge of the motor case through hole H1.

Further, for example, if the first electronic component has a square shape in a plan view of the IC package or the like, the motor case through hole is also formed in a square shape, so that a decrease in rigidity of the motor case 6 can be suppressed.

As shown in fig. 7, the motor case through holes H1 to H3 are arranged at equal intervals in the circumferential direction. The circuit board 11 has substrate through holes 11A arranged at equal intervals in the circumferential direction. The circuit board 11 is fixed to the motor case 6 by screws B2 passing through the board through holes 11A. The number of the substrate through holes 11A is three, which is a divisor of three, which is the number of the motor case through holes H1 to H3. That is, the motor case through holes H1 to H3 are formed in plural numbers at equal intervals in the circumferential direction, the circuit board 11 is fixed to the motor case 6 at plural fixing portions (board through holes 11A) arranged at equal intervals in the circumferential direction, and the number of the plural fixing portions 11A is a divisor of the number of the motor case through holes H1 to H3. Thus, if the design permits, the circuit board 11 can be rotatably attached to the motor case 6. In addition, when the number of the motor case through holes is four, for example, the number of the fixing portions 11A may be two, for example.

As described above, according to the present embodiment, since the motor 5 having a short axial length can be realized, the axial length of the blower 1 including the motor 5 can be shortened. In addition, the vacuum cleaner 100 has the air blowing device 1. This enables realization of a vacuum cleaner 100 (fig. 1) having the blower device 1 with a short axial length.

Fig. 10 is a perspective view of the lower case 62 as viewed from below. As shown in fig. 10, a rib 6213 is provided around the motor case through hole 621B (H1 to H3). The rib 6213 protrudes downward in the axial direction. That is, the motor housing 6 has a rib 6213 disposed around the motor housing through hole 621B and protruding in the axial direction. That is, in the motor housing 6, a rib 6213 is formed at the edge of the region constituting the motor housing through hole 621B. Since the reinforcement is achieved by the rib 6213, a decrease in rigidity of the motor case 6 can be suppressed.

Further, the rib 6213 protrudes downward. This can prevent the rib 6213 from interfering with the internal elements of the motor case 6.

<4.2 about spacers >

Next, the spacer 10 will be described in detail. Fig. 11 is a perspective view of the spacer 10 as viewed from above. The spacer 10 has a spacer base 101 and spacer arm portions 102A, 102B. The spacer base 101 is formed by expanding in the radial direction.

The spacer base 101 has a fitting hole 1013, cylinder portions 1011A to 1011C, and spacer hole portions 1012A to 1012C. The cylindrical portions 1011A to 1011C are arranged at equal intervals in the circumferential direction. The spacer hole 1012A is disposed adjacent to the cylindrical portion 1011A in the circumferential direction. The spacer holes 1012B and 1012C are arranged to sandwich the tube portion 1011B from both circumferential sides. The spacer hole portions 1012A to 1012C penetrate in the axial direction. That is, the spacer base 101 has spacer holes 1012A, 1012B, and 1012C that penetrate in the axial direction.

As shown in fig. 7, the circuit board 11 and the spacer 10 are fixed to the motor case 6 by passing a screw B2 through the substrate through hole 11A and the cylinder portions 1011A to 1011C and screwing in the screw hole 621A of the bottom plate portion 621. At this time, the fitting hole 1013 is fitted to the second bearing housing 622. That is, the spacer base 101 is provided with cylindrical portions 1011A, 1011B, 1011C through which a fixing member (screw B2) for fixing the circuit board 11 to the motor housing 6 is inserted.

As shown in fig. 8, the wire 941A is directed downward through the spacer hole portion 1012C. The wires 941B are passed through the spacer hole portions 1012A and 1012B, respectively, in a downward direction. That is, the leads 941A, 941B are inserted into the spacer hole portions 1012A, 1012B, 1012C. Thus, the leads 941A and 941B can be held in a predetermined arrangement.

Here, fig. 12 is a longitudinal sectional perspective view of the spacer 10 taken by the section B-B shown in fig. 11. As shown in fig. 12, the spacer hole portion 1012C has a tapered shape whose diameter decreases downward. Thus, the diameter of the spacer hole 1012C is large upward, and therefore the lead 941A can easily pass through the spacer hole 1012C. Further, since the spacer hole portion 1012C has a small diameter in the lower direction, the lead 941A passing through the spacer hole portion 1012C can be positioned by the spacer hole portion 1012C, and connection between the circuit board 11 and the lead 941A is facilitated. The same applies to spacer hole portions 1012A and 1012B.

Lower end portions of the leads 941A and 941B pass through the circuit board 11 from above to below, and are connected to a lower surface of the circuit board 11 by soldering. In a bottom view of air blower 1 shown in fig. 15 described later, connection portion CN where lead 941B is connected to circuit board 11 is shown. That is, the leads 941A and 941B extend downward through the circuit board 11 and are connected to the lower surface of the circuit board 11. This facilitates connection of the leads 941A and 941B to the circuit board 11. That is, since the leads 941A and 941B can be connected to the circuit board 11 on the lower surface of the circuit board 11, the connection work is facilitated because the leads interfere with other elements less than in the case of performing the connection work on the upper surface of the circuit board 11.

Fig. 13 is a plan view of the spacer 10 as viewed from above. The spacer arm portions 102A and 102B are arranged in the circumferential direction. Representatively, the spacer arm 102A is explained, and the spacer arm 102A has an arm first region 1021 and an arm second region 1022. The arm first region 1021 extends radially outward from the radially outer edge of the spacer base 101. The arm second region 1022 extends circumferentially from a radially outer end portion of the arm first region 1021. The arm portion second region 1022 is radially opposed to the radially outer edge of the spacer base 101, thereby forming an opposed region R. The circumferential end of the opposing region R opposite to the arm first region 1021 is open. That is, the facing region R is open at an end in a direction intersecting the radial direction. Each of the opposing regions R of the spacer arm portions 102A, 102B is open so as to circumferentially oppose each other.

That is, the spacer arm portions 102A, 102B have: an arm first region 1021 extending from the radially outer edge of the spacer base 101 in a direction away from the central axis C; and an arm second section 1022 extending from an outer end portion of the arm first section 1021 in a direction intersecting the radial direction. The arm second region 1022 and the radially outer edge of the spacer base 101 constitute an opposing region R.

In addition, in the present embodiment, as shown in fig. 14, leads L1, L2, L11, and L12 are actually connected to the circuit board 11. The leads L1, L2, L11, L12 extend from the lower surface of the circuit board 11. The lead lines L1, L2 are used to supply electric power to the motor 5 from the outside. The leads L11, L12 are used for UART communication with the outside. The diameters of the leads L1, L2 are larger than the diameters of the leads L11, L12.

Fig. 14 shows a state where blower device 1 is shipped from the factory, where leads L1, L2, L11, and L12 are respectively collected at positions above circuit board 11. Then, when the blower device 1 after shipment is mounted on the vacuum cleaner 100, the state shown in fig. 15 is achieved. Fig. 15 is a bottom view of air blower 1 when air blower 1 is mounted on vacuum cleaner 100.

As shown in fig. 15, when blower device 1 is mounted on cleaner 100, leads L11, L12, and L1 are inserted in order from the opening of facing region R of spacer arm 102A to the inside, and leads L11, L12, and L1 are sandwiched between spacer arm 102A and spacer base 101. At this time, the radial gap of the opposing region R is narrower than the diameters of the leads L11, L12, and L1, respectively. Thereby, the leads L11, L12, and L1 can be fixed by the elastic force of the spacer arm portion 102A.

Similarly, the lead L2 is inserted inward from the opening of the facing region R of the spacer arm 102B, and the lead L2 is sandwiched between the spacer arm 102B and the spacer base 101. At this time, the radial gap of the opposing region R is narrower than the diameter of the lead L2. Thereby, the lead L2 can be fixed by the elastic force of the spacer arm portion 102B.

The fixed lead wire is routed outside the motor 5 and electrically connected to the structure on the cleaner 1 side.

At this time, the leads L1, L2, L11, and L12 can be made to extend in the axial direction with respect to the motor 5 by passing the leads L1, L2, L11, and L12 through the facing region R.

Further, according to the target device on which the blower device 1 is mounted, the lead wire may not be fixed using the spacer arm portion. That is, the fixation may be performed as needed. At the time of shipment of the blower device 1, as shown in fig. 15, at least one of the leads L1, L2, L11, and L12 may be fixed to the facing region R.

For example, in a state where the lead L1 having a relatively large diameter is sandwiched between the spacer arm 102A and the spacer base 101, the gap in the opposing region R is enlarged, and the leads L11 and L12 are in a movable state, but the leads L11 and L12 may be prevented from dropping out by the lead L1.

As described above, in the present embodiment, the spacer 10 includes: a spacer base 101 that expands in a direction intersecting the center axis C; and spacer arm portions 102A and 102B arranged radially outward of the radially outer edge of the spacer base 101. To the circuit board 11, lead wires 941A and 941B extending downward from the stator 9 and lead wires L1, L2, L11, and L12 connectable to the outside are connected. The gap between the radially outer edge of the spacer base 101 and the spacer arm portions 102A, 102B is narrower than the diameters of the leads L1, L2, L11, L12.

Thus, the leads L1, L2, L11, and L12 can be fixed by a simple operation of sandwiching the leads L1, L2, L11, and L12 in the above-described gap as needed. That is, the leads L1, L2, L11, and L12 routed outside the motor 5 can be easily fixed.

Further, since the blower 1 includes the motor 5, the blower 1 can be fixed as necessary. Further, since the vacuum cleaner 100 includes the blower device 1, the vacuum cleaner 100 can be realized in which the lead wire can be fixed as needed.

In addition, leads L1, L2, L11, L12 extend from the lower surface of the circuit board 11. Accordingly, as compared with the case where the leads L1, L2, L11, and L12 extend from the upper surface of the circuit board 11, interference with other elements can be suppressed in the work of sandwiching the leads L1, L2, L11, and L12 in the above-described gap, and therefore the work of sandwiching the leads in the above-described gap is simpler.

As shown in fig. 15, the spacer arm portions 102A and 102B are arranged radially outward of the radially outer end of the circuit board 11. This makes it easier to fix the lead.

As shown in fig. 13, the radial gap of the facing region R gradually becomes narrower toward the circumferential end of the opening. That is, the gap in the facing region R gradually narrows toward the end in the direction intersecting the radial direction. This can suppress the fixed lead from falling off.

As shown in fig. 15, the circumferential length of the facing region R is equal to or greater than the sum of the diameters of the plurality of leads L1, L11, and L12 including the lead L1. That is, the length of the facing region R in the direction intersecting the radial direction is equal to or greater than the sum of the diameters of the plurality of leads L1, L11, and L12 including the lead L1. This can hold a plurality of leads at a time, thereby improving workability.

As shown in fig. 13, the connecting portions of the spacer arm portions 102A, 102B to the spacer base 101 are arranged radially outward of the cylindrical portions 1011B, 1011A on the same radial line. This can increase the rigidity of the spacer base 101, and can suppress deformation of the spacer base 101 even when a load is applied to the spacer arm portions 102A and 102B when the lead wires are fixed.

As shown in fig. 15, the radially outer ends of the spacer arm portions 102A and 102B are arranged radially outward of the radially outer end of the wheel house 2. This makes the fixing operation of the lead wire using the spacer arm portions 102A and 102B easier.

Fig. 16 is a plan view of the circuit board 11 as viewed from above. As shown in fig. 16, the upper surface of the circuit board 11 is divided into a circuit board first region R1 and a circuit board second region R2. The circuit board first region R1 is a region axially opposed to the spacer base 101. The circuit board second region R2 is a region that is not axially opposed to the spacer base 101. The capacitors C1 and C2 are disposed in the second region R2 of the circuit board. The capacitors C1 and C2 extend upward through the space where the spacer 10 is not disposed, and are accommodated in the motor case through hole 621B. That is, the upper surface of the circuit board 11 has a circuit board first region R1 axially opposed to the spacer base 101 and a circuit board second region R2 not axially opposed to the spacer base 101, and electronic elements (capacitors C1, C2) having a longer axial length than the axial gap between the circuit board 11 and the spacer 10 are arranged in the circuit board second region R2. Accordingly, electronic components having a long axial length can be arranged in the circuit board second region R2, interference between the spacer 10 and the electronic components (the capacitors C1 and C2) can be suppressed, and the axial length of the motor 5 can be shortened.

Further, since at least a part of the electronic components (capacitors C1, C2) is accommodated in the motor case through hole 621B, the electronic components having a longer axial length can be disposed in the circuit board second region, and the axial length of the motor 5 can be further shortened.

<5. modified example of capacitor >

Fig. 17 is a perspective view showing a partial configuration of the motor 5 of the embodiment in the case of using the above-described modified example of the capacitors C1 and C2. Fig. 17 shows a state in which a part of the upper insulator 92, a part of the lower insulator 93, and a part of the coil portion 94 are removed for convenience.

In the embodiment shown in fig. 17, capacitors C11 and C12, which are longer in the axial direction than the capacitors C1 and C2, are used. As shown in fig. 17, the stator core 91 of the stator 9 has a core back 911 and a plurality of teeth 912. Teeth 912 extend radially inward from the inner circumferential surface of core back 911. The coil portion 94 is formed by winding a coil around each tooth 912. The capacitors C11 and C12 have upper ends located above the lower ends of the coil portions 94, and are disposed between circumferentially adjacent coil portions 94.

That is, the stator 9 has coil portions 94 formed by winding a winding around a plurality of teeth arranged in the circumferential direction and extending in the radial direction, and the upper ends of the first electronic components (C11, C12) are arranged above the lower ends of the coil portions 94 and between the coil portions 94 adjacent in the circumferential direction. This can further shorten the axial length of the motor 5.

<6. others >

While the exemplary embodiments of the present invention have been described above, various modifications and combinations of the embodiments can be made within the scope of the present invention.

For example, the blower is not limited to a vacuum cleaner, and may be mounted on various OA equipment, medical equipment, transportation equipment, or household electronic products other than a vacuum cleaner.

The motor does not have to be mounted in the blower. I.e. it is not necessary to use an impeller.

Industrial applicability

The utility model discloses can be used for air supply arrangement that the dust catcher used for example.

Claims (13)

1. A motor is characterized in that a motor is provided,

the motor has:

a rotor rotatable about a central axis extending vertically;

a stator that is radially opposed to the rotor;

a motor housing surrounding a lower portion of the stator; and

a circuit board disposed below the motor case, the circuit board having a plurality of electronic components disposed thereon,

the motor housing is formed with a motor housing through hole penetrating in an axial direction,

a first electronic component extending upward from the circuit board and having a longest axial length among the plurality of electronic components is arranged on an upper surface of the circuit board,

at least a part of the first electronic component is received in the motor housing through hole.

2. The motor of claim 1,

the motor shell through hole is formed in a plurality of through holes,

the first electronic component is housed in at least one of the motor case through holes.

3. The motor of claim 2,

the first electronic component is provided with a plurality of,

the plurality of first electronic components are received in one of the motor case through holes.

4. The motor of claim 2,

the first electronic component is provided with a plurality of,

the plurality of first electronic components are respectively accommodated in the different motor case through holes.

5. The motor of claim 3,

an outer edge of one of the motor case through holes has a shape along an outer edge of the plurality of first electronic components in a plan view.

6. The motor of claim 5,

the first electronic component has a cylindrical shape extending in the axial direction,

an outer edge of one of the motor case through holes has two circular arc portions along an outer edge of the first electronic component and a curved portion connecting the circular arc portions and protruding inward, as viewed in a plan view.

7. The motor according to any one of claims 1 to 6,

the stator has a coil portion formed by winding a winding around a plurality of teeth arranged in a circumferential direction and extending in a radial direction,

an upper end of the first electronic component is arranged above a lower end of the coil portions and between the circumferentially adjacent coil portions.

8. The motor according to any one of claims 1 to 6,

the motor housing through-holes are formed in plurality at equal intervals in the circumferential direction,

the circuit board is fixed to the motor case at a plurality of fixing portions arranged at equal intervals in a circumferential direction,

the number of the plurality of fixing portions is a divisor of the number of the motor case through holes.

9. The motor according to any one of claims 1 to 6,

the motor housing has a rib disposed around the motor housing through hole and protruding in an axial direction.

10. The motor of claim 9,

the rib protrudes downward.

11. An air supply device is characterized in that,

the air supply device comprises:

the motor of any one of claims 1 to 10;

an impeller fixed to the rotor and rotatable about the center axis; and

an impeller housing that houses the impeller.

12. The air supply arrangement of claim 11,

the motor housing has a motor housing communication hole that communicates the inside of the impeller cover with the inside of the motor housing.

13. A dust collector is characterized in that a dust collector is provided,

the vacuum cleaner has the air blowing device of claim 11 or 12.

Images