WO2024062670A1

WO2024062670A1 - Electric blower

Info

Publication number: WO2024062670A1
Application number: PCT/JP2023/017357
Authority: WO
Inventors: 元宇賀治; 正雄小島; 将小山; 才明松本
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2022-09-22
Filing date: 2023-05-09
Publication date: 2024-03-28

Abstract

This electric blower comprises a motor that has a rotating shaft and an outwardly protruding connector, an impeller that is attached to the rotating shaft, and a fan case that has a ventilation path through which passes outside air sucked in due to rotation of the impeller. The motor is attached to the outer-surface side of the fan case, and a plurality of connector placement parts where the connector can be placed are provided to predetermined positions between the fan case and the motor.

Description

electric blower

The present disclosure relates to an electric blower.

Electric blowers are used in a variety of products, such as automobiles or electrical appliances. For example, electric blowers are used to cool secondary batteries installed in electric vehicles, such as hybrid electric vehicles or pure electric vehicles. A known example of this type of electric blower is a battery cooling blower. A battery cooling blower includes, for example, a motor, an impeller attached to the rotating shaft of the motor, and a fan case having a ventilation passage through which outside air drawn in by the rotation of the impeller passes (see, for example, Patent Document 1).

In conventional electric blowers, the motor is attached to the fan case. The motor is provided with a connector to which a power supply line for power supply is connected. The connector is sometimes provided so as to protrude outward from a motor case, which is an outer shell member of the motor.

For example, the connector is provided so as to protrude outward in a direction (radial direction) perpendicular to the rotation axis of the motor. In an electric blower including a fan motor to which a motor having such a connector is attached, the position of the connector with respect to the fan case may need to be changed depending on the mounting orientation of the electric blower.

For example, in a battery cooling blower installed in an automobile, the position of the connector relative to the fan case may need to be changed depending on the mounting orientation of the electric blower in the automobile to prevent the connector from becoming submerged in water. In this case, a new fan case to which the motor can be attached needs to be manufactured according to the new connector position.

However, if a new fan case is manufactured according to the position of the connector, the number of electric blower models will increase. This increases the development cost and manufacturing cost of the electric blower.

JP 2015-31253 Publication

The present disclosure has been made to solve such problems. An object of the present disclosure is to provide an electric blower in which the position of the connector of the motor can be changed in a plurality of patterns despite having one type of motor and one type of fan case.

In order to achieve the above object, one aspect of the electric blower according to the present disclosure includes a motor having a rotating shaft and an outwardly protruding connector, an impeller attached to the rotating shaft, and an impeller that rotates. a fan case having a ventilation passage through which outside air is sucked in, the motor being attached to an outer surface of the fan case, and a predetermined space between the fan case and the motor. A plurality of connector placement portions are provided at the locations, in which the connectors can be placed.

It is preferable that each of the plurality of connector arrangement parts is provided in the fan case.

A wall into which the motor is fitted is provided on the outer surface of the fan case, and each of the plurality of connector placement portions is a cutout formed by cutting out a part of the wall, and the connector is inserted into the cutout. Preferably, it protrudes outward from the notch.

A plurality of columns supporting the motor are provided on the outer surface of the fan case, the plurality of columns are located inside the wall, and the height of the wall is greater than the height of the plurality of columns. Preferably high.

Three or more struts supporting the motor are provided on the outer surface of the fan case, and the plurality of connector placement portions may be gaps between two adjacent struts among the three or more struts. preferable.

The three or more pillars are six or more pillars, and the six or more pillars are a first pillar group consisting of a combination of three or more pillars, and a combination of three or more pillars. and a second support group, the three or more supports forming the first support group are provided at equal intervals in a circumferential direction centering on the rotation axis, and forming the second support group. The three or more pillars are provided at equal intervals in a circumferential direction around the rotation axis, and the three or more pillars constitute the first pillar group and the second pillar group. It is preferable that the three or more supports are deviated from each other by a predetermined angle about the rotation axis so that they are not equally spaced.

A circular hole may be provided in each of the three or more pillars, and the three or more pillars and the motor may be fixed by inserting screws into the circular holes.

Each of the three or more pillars may be elongated in the circumferential direction around the rotation axis, and each of the three or more pillars may have a long hole that is elongated in the circumferential direction, and the three or more pillars and the motor may be fixed together by inserting a screw into the long hole.

It is preferable that the ventilation passage is formed outside the impeller.

Although the electric blower of the present disclosure has one type of motor and one type of fan case, the position of the motor connector can be changed in a plurality of patterns.

FIG. 1 is a perspective view of an electric blower according to a first embodiment. FIG. 2 is a plan view (first pattern layout) of the electric blower according to the first embodiment. FIG. 3 is an exploded view of the electric blower according to the first embodiment. FIG. 4 is a perspective view of the first case of the fan case and the motor when the electric blower according to the first embodiment is disassembled. FIG. 5 is a plan view showing the layout of the second pattern in the electric blower according to the first embodiment. FIG. 6 is a plan view showing the layout of the third pattern in the electric blower according to the first embodiment. FIG. 7 is a perspective view of the first case of the fan case and the motor when the electric blower according to the second embodiment is disassembled. FIG. 8 is a plan view showing the layout of the first pattern in the electric blower according to the second embodiment. FIG. 9 is a plan view showing the layout of the second pattern in the electric blower according to the second embodiment. FIG. 10 is a plan view showing the layout of the third pattern in the electric blower according to the second embodiment. FIG. 11 is a plan view of a fan case in an electric blower according to Modification 1 of Embodiment 2. FIG. 12 is a plan view of an electric blower according to Modification 1 of Embodiment 2. FIG. 13 is a plan view of a fan case in an electric blower according to a second modification of the second embodiment. FIG. 14 is a plan view of an electric blower according to a second modification of the second embodiment. FIG. 15 is a perspective view of the first case of the fan case and the motor when the electric blower according to the third embodiment is disassembled. FIG. 16 is a plan view showing the layout of the first pattern in the electric blower according to the third embodiment. FIG. 17 is a plan view showing a layout of a second pattern in the electric blower according to the third embodiment. FIG. 18 is a plan view showing the layout of the third pattern in the electric blower according to the third embodiment. FIG. 19 is a diagram showing how the position of the motor is finely adjusted in the electric blower according to the third embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The embodiments described below are all specific examples of the present disclosure. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and do not limit the present disclosure. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims representing the most important concept of the present disclosure will be described as arbitrary constituent elements.

Each figure is a schematic diagram and is not necessarily strictly illustrated. In each figure, components that are substantially the same as those in other figures are denoted by the same reference numerals, and overlapping explanations will be omitted or simplified. In this specification, the terms "upper" and "lower" do not necessarily refer to the upper direction (vertically upward) and the downward direction (vertically downward) in absolute spatial recognition.

(Embodiment 1)
The overall configuration of electric blower 1 according to Embodiment 1 will be explained using FIGS. 1 to 4. FIG. FIG. 1 is a perspective view of an electric blower 1 according to the first embodiment. FIG. 2 is a plan view (first pattern layout) of the electric blower 1 according to the first embodiment. FIG. 3 is an exploded view of the electric blower 1 according to the first embodiment. FIG. 4 is a perspective view of the first case 30a of the fan case 30 and the motor 10 when the electric blower 1 according to the first embodiment is disassembled.

The electric blower 1 is attached to a predetermined attachment target, for example. The electric blower 1 is used to cool an object to be cooled. As an example, the electric blower 1 is a cooling fan used to cool a radiator, a battery unit, or the like mounted on a two-wheeled or four-wheeled vehicle. The electric blower 1 is a blower that cools a battery unit including a secondary battery for supplying power to a driving motor of an electric vehicle. In this case, the electric blower 1 is attached to, for example, a cover of a battery unit. The electric blower 1 blows the sucked outside air as cooling air to the secondary battery in the battery unit. Electric blower 1 in this embodiment is a centrifugal fan. However, it is not limited to this.

As shown in FIGS. 1 to 3, the electric blower 1 includes a motor 10, an impeller 20, and a fan case 30.

The motor 10 has a rotating shaft 11 and a motor case 12. The motor 10 may be either a DC motor or an AC motor. The motor 10 may be a brushed motor that uses brushes, or a brushless motor that does not use brushes.

The rotating shaft 11 is a shaft having an axial center. The rotating shaft 11 is a rod-shaped member. As an example, the rotating shaft 11 is a metal rod made of a metal material such as SUS (Steel Use Stainless). The axis of the rotating shaft 11 is the center of rotation of the rotor. The axial direction of the rotating shaft 11 is the longitudinal direction of the rotating shaft 11. That is, the axial direction of the rotating shaft 11 is the direction in which the rotating shaft 11 extends.

The motor case 12 is an outer shell casing that constitutes the outer shell of the motor 10. The motor case 12 is, for example, a housing made of a sheet metal whose main component is a metal material such as aluminum or iron. The motor case 12 is composed of a bottomed cylindrical case main body 12a having a step-shaped side wall and a plate-like top surface, and a case lid 12b that is a bottom plate that closes the case main body 12a. There is. The case lid 12b, which is the bottom plate, can be made of a metal material, for example, like the motor case 12. As the material of the case lid 12b, a resin material or other materials can be used. The rotating shaft 11 is arranged so that its tip side protrudes outward from an opening formed in the top surface of the case body 12a.

Although not shown, a rotor having a rotating shaft 11, a stator that generates magnetic force for rotating the rotor, and a bearing that supports the rotating shaft 11 are housed inside the motor case 12. The motor 10 may be an inner rotor type motor in which the rotor is disposed inside the stator, or may be an outer rotor type motor in which the rotor is disposed outside the stator.

As shown in Figures 2 to 4, the motor 10 has a connector 13. The connector 13 is an external connection terminal that is electrically connected to an external power source. As shown in Figure 2, a power line 40 for supplying power to the motor 10 is connected to the connector 13. The connector 13 is a female connector having a tubular member made of an insulating resin material. A male connector provided at one end of the power line 40 is connected to the connector 13. A metal piece that serves as an electrical contact is arranged inside the tubular member. The power line 40 may be a wire harness that bundles together a power supply line and a signal line.

The connector 13 protrudes outward from the motor case 12. Specifically, the connector 13 protrudes outward from the motor case 12 in a direction intersecting the rotating shaft 11 . The connector 13 protrudes outward in a direction perpendicular to the rotating shaft 11 (that is, in a radial direction of the motor 10). Connector 13 may be fixed to motor case 12 or may be fixed to a member disposed within motor case 12.

The motor 10 has a flange portion 14 that projects outward from the motor case 12 in a brim shape. The flange portion 14 is a part of the metal motor case 12. Therefore, the flange portion 14 is also made of metal. Specifically, the flange portion 14 is formed to extend from the lower end of the side wall portion of the case body 12a and from each of the plate-shaped case lid body 12b in a direction perpendicular to the rotation axis 11 (radial direction). It is constructed by overlapping plate parts. The flange portion 14 may be provided separately from the case body 12a and the case lid body 12b.

As shown in FIG. 2, the flange portion 14 extends from the motor case 12 so as to have a substantially triangular (rice ball-shaped) outer shape when viewed from the axial direction of the rotating shaft 11. That is, the flange portion 14 is formed so as to protrude in the form of a mountain from three locations on the side wall portion of the circular motor case 12 toward the outside in the radial direction. The three protruding portions of the flange portion 14 that protrude in the shape of a mountain are formed at equal intervals.

The flange portion 14 is provided with a plurality of through holes 14a. The plurality of through holes 14a are screw holes into which screws used when attaching the motor 10 to the fan case 30 are inserted. The plurality of through holes 14a are provided at equal intervals in the circumferential direction around the axis of the rotating shaft 11. In this embodiment, three through holes 14a are provided at 120° intervals. Specifically, the three through holes 14a are provided at three protruding portions of the flange portion 14 that protrude like mountains.

Although not shown, a plurality of brackets are attached to the flange portion 14, which serve as legs for attaching the electric blower 1 to an object (such as a battery unit). The flange portion 14 may be provided with through holes for fixing a plurality of brackets to the flange portion 14 with screws. In this way, the flange portion 14 not only functions as an attachment portion for attaching the motor 10 to the fan case 30, but also functions as an attachment portion for attaching the electric blower 1 to an object. The bracket for attaching the electric blower 1 to an object may be attached to another member such as the fan case 30 instead of being attached to the flange portion 14 of the motor 10.

The impeller 20 is a rotating fan for sucking in outside air. The impeller 20 is attached to the rotating shaft 11 of the motor 10. Therefore, when the rotating shaft 11 is rotated by the drive of the motor 10, the impeller 20 also rotates. As the impeller 20 rotates, negative pressure is generated at the intake port 31, and air is sucked into the fan case 30.

As shown in FIGS. 1 and 2, the impeller 20 has a boss 21 attached to the rotating shaft 11 and a plurality of blades 22 provided so as to surround the boss 21. Since the electric blower 1 is a blower, the plurality of blades 22 are arranged on the outside of the boss 21 so as to stand substantially parallel to the rotating shaft 11 . The plurality of blades 22 are arranged in an annular shape at equal intervals when viewed from the axial direction of the rotating shaft 11.

As shown in FIGS. 1 and 3, the fan case 30 has an intake port 31, an exhaust port 32, and a ventilation path 33 (air path) through which outside air sucked in by the rotation of the impeller 20 passes. As the impeller 20 rotates, outside air is sucked in from the intake port 31, passes through the ventilation path 33, and is exhausted from the exhaust port 32. In other words, the intake port 31 is an inlet that serves as an inlet for sucking outside air into the fan case 30 . The exhaust port 32 is an outlet through which the outside air sucked in from the intake port 31 exits to the outside of the fan case 30.

Since the electric blower 1 is a blower, the opening surface of the intake port 31 is substantially orthogonal to the axis of the rotating shaft 11. A ventilation passage 33 extends along the rotational direction of the rotating shaft 11. The opening surface of the exhaust port 32 is substantially parallel to the axis of the rotating shaft 11.

The fan case 30 houses the impeller 20. The ventilation passage 33 is formed outside the impeller 20. Specifically, when viewed from the axial direction of the rotating shaft 11, the ventilation passage 33 is formed in an annular shape so as to surround the impeller 20.

In the fan case 30 configured in this manner, the outside air sucked from the intake port 31 by the rotation of the impeller 20 passes through the ventilation path 33 formed along the outer circumference of the impeller 20, and then reaches the exhaust port. It is exhausted from 32 as cooling air. For example, the cooling air exhausted from the exhaust port 32 is blown into the inside of the battery unit directly or through a ventilation path installed as necessary. Thereby, the secondary battery inside the battery unit is cooled.

The fan case 30 is made of a resin material such as polypropylene. The fan case 30 is manufactured, for example, by injection molding. The fan case 30 includes a first case 30a and a second case 30b. Therefore, the fan case 30 is molded separately into a first case 30a and a second case 30b. The first case 30a and the second case 30b are configured to be connectable via a hook mechanism that they have.

As shown in FIG. 4, a wall 34 is provided on the outer surface of the fan case 30. The wall 34 is provided on the outer surface of the first case 30a. The wall 34 is formed so as to protrude and extend from the outer surface of the fan case 30. The motor 10 is fitted into the wall 34. In other words, the motor 10 is surrounded by the wall 34. Fitting the motor 10 into the wall 34 restricts the movement of the motor case 12 of the motor 10. When the motor 10 is fitted into the wall 34, part or all of the inner surface of the wall 34 is in contact with the outer surface of the side wall of the motor case 12.

As shown in FIG. 4, a plurality of pillars 35 that support the motor 10 are provided on the outer surface of the fan case 30. The support column 35, like the wall 34, is provided on the outer surface of the first case 30a. A plurality of struts 35 are located inside the wall 34. The motor 10 is supported by the plurality of columns 35 by placing the flange portion 14 of the motor 10 on the plurality of columns 35 .

The height of the wall 34 is higher than the height of the plurality of pillars 35. Therefore, when the flange portion 14 of the motor 10 is placed on the plurality of supports 35, the wall 34 surrounds the motor case 12 of the motor 10.

The plurality of support columns 35 not only function as a support section that supports the motor 10, but also function as a mounting section for attaching the motor 10 to the fan case 30 with screws. Therefore, the plurality of support columns 35 are provided with screw holes 35a into which screws are inserted. The screw hole 35a provided in the support column 35 is a circular hole with a circular opening. The screw hole 35a of the support column 35 corresponds to the through hole 14a provided in the flange portion 14 of the motor 10.

Three through holes 14a are provided in the flange portion 14 at intervals of 120° around the axis of the rotating shaft 11. Therefore, three pillars 35 provided with screw holes 35a are also provided at intervals of 120 degrees around the axis of the rotating shaft 11.

When fixing the motor 10 to the three pillars 35, place the flange part 14 of the motor 10 on the three pillars 35 so that the through hole 14a of the flange part 14 and the screw hole 35a of the pillar 35 overlap, and fix the flange part 14 to the three pillars 35. A screw is inserted into the through hole 14a of the portion 14, and then screwed into the screw hole 35a of the support column 35. Thereby, the motor 10 can be attached to the fan case 30.

In this way, the motor 10 is attached not to the inner surface of the fan case 30 but to the outer surface of the fan case 30, which is the surface on which the wall 34 and the support column 35 are provided. Specifically, the motor 10 is attached to the outer surface of the first case 30a.

As shown in FIG. 4, the electric blower 1 is provided with a plurality of connector arrangement parts 36 in which the connectors 13 of the motor 10 can be arranged at predetermined positions between the fan case 30 and the motor 10. ing. The plurality of connector arrangement parts 36 are provided in the fan case 30. Specifically, the plurality of connector arrangement parts 36 are cutout parts obtained by cutting out a part of the wall 34 provided in the fan case 30. As shown in FIG. 2, when the motor 10 is attached to the fan case 30, the connector 13 of the motor 10 projects outward from the connector placement portion 36, which is a cutout.

In this way, by providing a plurality of connector arrangement parts 36 in one fan case 30, the position (orientation) of the connector 13 of the motor 10 can be changed in a plurality of patterns. The plurality of connector placement portions 36 are provided so that the connectors 13 are located at appropriate positions on the fan case 30 when the entire motor 10 (motor case 12) is rotated about the axis of the rotating shaft 11. It is being That is, the plurality of connector arrangement parts 36 are provided so that the connector 13 is located at a position where it can be connected to the power supply line 40 as an external connection terminal.

The plurality of connector placement portions 36 are provided at equal intervals in the circumferential direction around the axis of the rotating shaft 11. That is, the plurality of connector arrangement parts 36 are provided at positions that are rotationally symmetrical about the axis of the rotating shaft 11. The plurality of connector placement portions 36 may not be provided at equal intervals.

As shown in FIG. 4, in the electric blower 1, one fan case 30 is provided with three connector placement parts 36. Specifically, the three connector arrangement portions 36 are provided at equal intervals of 120 degrees around the axis of the rotating shaft 11.

FIG. 5 is a plan view showing the layout of the second pattern in the electric blower 1 according to the first embodiment. FIG. 6 is a plan view showing the layout of the third pattern in the electric blower 1 according to the first embodiment. In this way, by providing the three connector arrangement parts 36 in one fan case 30, the first pattern shown in FIG. 2, the second pattern shown in FIG. 5, and the third pattern shown in FIG. The motor 10 can be attached to the fan case 30 in three patterns. In other words, although both the motor 10 and the fan case 30 are of one type, the motor 10 can be attached to the fan case 30 in three different layouts. 2, 5, and 6 show the layout of the motor 10 relative to the fan case 30 when the entire motor 10 (motor case 12) is rotated by 120 degrees. Three connector arrangement parts 36 are provided. However, it is not limited to this. The number of connector arrangement parts 36 may be two, or four or more.

As described above, according to the electric blower 1 according to the present embodiment, there are a plurality of connector arrangement parts 36 in which the connector 13 of the motor 10 can be arranged at a predetermined position between the fan case 30 and the motor 10. It is provided.

With this configuration, even though there is only one type of motor and one type of fan case, the position of the connector 13 of the motor 10 can be changed in multiple patterns. This allows one pattern to be selected from multiple patterns depending on the mounting posture of the electric blower 1 when the electric blower 1 is mounted on the mounting object, and the position of the connector 13 of the motor 10 can be determined, and the motor 10 can be mounted to the fan case 30.

In the electric blower 1 according to the present embodiment, a wall 34 into which the motor 10 is fitted is provided on the outer surface of the fan case 30. The plurality of connector arrangement parts 36 are cutout parts obtained by cutting out a part of the wall 34.

With this configuration, when attaching the motor 10 to the fan case 30, simply set the motor 10 in a position where it fits into the wall 34, and then attach the connector 13 to one connector placement portion 36 determined from among the plurality of connector placement portions 36. can be placed. At this time, the connector 13 is set so as to fit into the connector placement section 36, which is a notch, and protrude outward from the connector placement section 36. Thereby, the motor 10 can be easily attached to the fan case 30 at the position of the connector 13 determined according to the attachment orientation of the electric blower 1.

In the electric blower 1 according to the present embodiment, a plurality of supports 35 are also provided on the outer surface of the fan case 30. However, the plurality of columns 35 are located inside the wall 34. The height of the wall 34 is higher than the height of the plurality of pillars 35.

With this configuration, when the motor 10 is attached to the fan case 30 at the determined position of the connector 13, the motor 10 can be easily fitted to the wall 34 without interference between the support column 35 and the motor 10. In other words, the motor 10 can be attached to the fan case 30 without being obstructed by the support column 35.

(Embodiment 2)
An electric blower 1A according to Embodiment 2 will be explained using FIG. 7. FIG. 7 is a perspective view of the first case 30a of the fan case 30A and the motor 10 when the electric blower 1A according to the second embodiment is disassembled. FIG. 8 is a plan view showing the layout of the first pattern in the electric blower 1A according to the second embodiment. FIG. 9 is a plan view showing the layout of the second pattern in the electric blower 1A according to the second embodiment. FIG. 10 is a plan view showing the layout of the third pattern in the electric blower 1A according to the second embodiment.

The electric blower 1A according to the present embodiment differs from the electric blower 1 according to the first embodiment in the configuration of the connector arrangement portion 36A. Specifically, in this embodiment, the structure of the fan case 30A is different from the first embodiment described above.

As shown in FIG. 7, in the electric blower 1A, the plurality of connector placement parts 36A are gaps between two adjacent columns 35A of the plurality of columns 35A provided on the outer surface of the fan case 30A. In this case, in order to be able to arrange the connector 13 in three patterns as in the first embodiment, three or more pillars 35A are required. In this embodiment, three pillars 35A are provided on the outer surface of the fan case 30A. Specifically, the three pillars 35A are provided at 120° intervals on the outer surface of the first case 30a of the fan case 30A.

In this embodiment, as in the first embodiment, each of the plurality of support columns 35A is provided with a circular screw hole 35a. The plurality of supports 35A and the motor 10 are fixed by inserting screws into the screw holes 35a. In this embodiment, unlike the first embodiment, the fan case 30A is not provided with a wall 34 into which the motor 10 is fitted.

In this way, in the electric blower 1A, one fan case 30A is provided with three gaps as connector arrangement portions 36A. This allows the motor 10 to be attached to the fan case 30A in three patterns: a first pattern shown in FIG. 8, a second pattern shown in FIG. 9, and a third pattern shown in FIG. 10. In other words, even in this embodiment, the motor 10 can be attached to the fan case 30A in three different layouts. FIGS. 8, 9, and 10 show the layout of the motor 10 relative to the fan case 30A when the entire motor 10 (motor case 12) is rotated 120° each time.

In this embodiment, when the motor 10 is attached to the fan case 30A, the connector 13 of the motor 10 protrudes outward from the connector placement portion 36A, which is the gap between two adjacent columns 35A. Placed.

As described above, according to the electric blower 1A according to the present embodiment, the connector 13 of the motor 10 can be arranged at a predetermined position between the fan case 30A and the motor 10, as in the first embodiment. A plurality of connector arrangement portions 36A are provided. Specifically, in this embodiment, the connector placement portion 36A provided in the fan case 30A is a gap between two adjacent support columns 35A.

With this configuration, the position of the connector 13 of the motor 10 can be changed in a plurality of patterns even though the motor 10 is one type and the fan case 30A is one type, as in the first embodiment. . Thereby, the motor 10 can be attached to the fan case 30A at the position of the connector 13 determined according to the attachment orientation of the electric blower 1A.

In FIG. 7, three pillars 35A are provided on the fan case 30A. However, it is not limited to this. FIG. 11 is a plan view of a fan case 30A in an electric blower 1A according to a first modification of the second embodiment. FIG. 12 is a plan view of an electric blower 1A according to a first modification of the second embodiment. For example, as shown in FIG. 11, six support columns 35A may be provided in the fan case 30A. Thereby, as shown in FIG. 12, the motor 10A can be attached to the fan case 30A at the position of the connector 13A determined according to the attachment orientation of the electric blower 1A.

However, in FIG. 11, six pillars 35A are provided at equal intervals of 60°. As a result, depending on the position of the connector 13A in the motor case 12, there is a possibility that the connector 13 and the support column 35A may interfere with each other. Therefore, as in the motor 10A shown in FIG. 12, in order to avoid interference between the connector 13A and the support column 35A, it is necessary to devise at least one of the shape and position of the connector 13A or the shape of the motor case 12A. There is a risk that it may not occur.

FIG. 13 is a plan view of a fan case 30A in an electric blower 1A according to a second modification of the second embodiment. As shown in FIG. 13, six columns 35A are arranged at equal intervals around the rotation axis 11, and a first column group G1 consisting of a combination of three columns 35A arranged at equal intervals around the rotation axis 11. The three struts 35A constituting the first strut group G1 and the three struts 35A constituting the second strut group G2 are separated at equal intervals. It is preferable to provide them so as to be offset by a predetermined angle about the rotating shaft 11 so as not to cause the

In the electric blower 1A shown in FIG. 13, three struts 35A constituting the first strut group G1 are provided at equal intervals of 120°. The three pillars 35A constituting the second pillar group G2 are also provided at equal intervals of 120°. The three struts 35A constituting the first strut group G1 and the three struts 35A constituting the second strut group G2 are provided so as to be shifted by 30 degrees around the rotating shaft 11 so as not to be equally spaced.

FIG. 14 is a plan view of an electric blower 1A according to a second modification of the second embodiment. With the configuration of the fan case 30A shown in FIG. 13, the motor 10 can be attached to the fan case 30A without modifying at least one of the shape and position of the connector 13, as shown in FIG. That is, the motor 10 having the connector 13 shown in FIG. 7 can be used.

In Modification 1 shown in FIG. 11 and Modification 2 shown in FIG. 13, there are six pillars 35A. However, it is not limited to this. That is, the number of pillars 35A may be six or more. In this case, in Modification 2 shown in FIG. 13, the number of columns 35A forming the first column group G1 and the second column group G2 is three or more.

(Embodiment 3)
An electric blower 1B according to Embodiment 3 will be described using FIG. 15. FIG. 15 is a perspective view of the first case 30a of the fan case 30B and the motor 10 when the electric blower 1B according to the third embodiment is disassembled.

Similarly to the second embodiment, the electric blower 1B according to the present embodiment differs from the electric blower 1 according to the first embodiment in the configuration of the connector arrangement portion 36B. Specifically, this embodiment also differs from the first embodiment in the structure of the fan case 30B.

As shown in FIG. 15, in the electric blower 1B according to the present embodiment, as in the second embodiment, a plurality of connector arrangement portions 36B are arranged adjacent to each other on a plurality of support columns 35B provided on the outer surface of the fan case 30B. This is the gap between the two matching columns 35B. Also in this embodiment, three pillars 35B are provided on the outer surface of fan case 30B. Specifically, the three pillars 35B are provided at 120° intervals on the outer surface of the first case 30a of the fan case 30B.

Also in this embodiment, as in the first embodiment, a screw hole 35a is provided in each of the plurality of pillars 35B. The plurality of supports 35B and the motor 10 are fixed by inserting screws into the screw holes 35a. The specific configuration of the support column 35B and the screw hole 35a will be described later. Also in this embodiment, as in the first embodiment, the fan case 30B is not provided with the wall 34 into which the motor 10 is fitted.

In this way, in the electric blower 1B according to the present embodiment, the connector 13 of the motor 10 is arranged at a predetermined position between the fan case 30B and the motor 10, as in the first and second embodiments. A plurality of connector arrangement parts 36B are provided.

With this configuration, the position of the connector 13 of the motor 10 can be changed in a plurality of patterns even though the motor 10 is of one type and the fan case 30B of one type is used, as in the first and second embodiments. can.

In this embodiment, similarly to the second embodiment described above, the connector placement portion 36B provided in the fan case 30B is a gap between two adjacent pillars 35B. Three gaps are provided in one fan case 30B as connector placement portions 36B.

FIG. 16 is a plan view showing the layout of the first pattern in the electric blower 1B according to the third embodiment. FIG. 17 is a plan view showing the layout of the second pattern in the electric blower 1B according to the third embodiment. FIG. 18 is a plan view showing the layout of the third pattern in the electric blower 1B according to the third embodiment. The motor 10 can be attached to the fan case 30B in three patterns: the first pattern shown in FIG. 16, the second pattern shown in FIG. 17, and the third pattern shown in FIG. 18. That is, in this embodiment as well, the motor 10 can be attached to the fan case 30B in three types of layouts. 16, 17, and 18 show the layout of the motor 10 relative to the fan case 30B when the entire motor 10 (motor case 12) is rotated by 120 degrees.

However, in this embodiment, the shape of the support column 35B is different from that in the second embodiment. Specifically, in the second embodiment, the support column 35A has a cylindrical shape. A circular screw hole 35a is provided in the support column 35A. On the other hand, in this embodiment, the support column 35B is a pair of wall plates that are elongated in the circumferential direction around the rotating shaft 11. The column 35B has a screw hole 35a that is elongated in the circumferential direction around the rotating shaft 11. It is a hole.

In this case, when attaching the motor 10 to the fan case 30B, the flange part 14 of the motor 10 is placed on the support post 35B, and a bolt is inserted as a screw into the through hole 14a of the flange part 14, and the bolt is inserted into the through hole of the support post 35B. The motor 10 can be attached to the fan case 30B by inserting a bolt into the long screw hole 35a, attaching a nut to the bolt, and tightening the nut.

FIG. 19 is a diagram showing how to fine-tune the position of the motor in an electric blower according to embodiment 3. Because the screw hole 35a is an elongated hole, as shown in FIG. 19, the position of the motor 10 can be fine-tuned within the range of the length of the elongated hole. In other words, in this embodiment, like the above-mentioned embodiments 1 and 2, the motor 10 can basically be attached to the fan case 30B in three patterns of connector 13 positions, and in addition, as shown in FIG. 19, the position of the connector 13 can be changed in each of the three patterns.

(Modified example)
The electric blower according to the present disclosure has been described above based on the embodiments. However, the present disclosure is not limited to the first to third embodiments described above.

For example, in the first to third embodiments described above, the plurality of

connector arrangement parts

36, 36A, and 36B are provided in the

fan cases

30, 30A, and 30B. However, it is not limited to this. In other words, the plurality of connector placement parts may not be provided in the fan case. In this case, the plurality of connector placement parts can be provided, for example, in a member that is fixed to the fan case and is separate from the fan case.

In the first to third embodiments described above,

electric blowers

1, 1A, and 1B are used in automobiles. However, it is not limited to this. For example,

electric blowers

1, 1A, and 1B may be used in home appliances such as vacuum cleaners.

In the first to third embodiments described above, the

electric blowers

1, 1A, and 1B are cooling blowers. However, it is not limited to this. For example,

electric blowers

1, 1A, and 1B may be used for purposes other than cooling.

In addition, the embodiments 1 to 3 may be obtained by making various modifications that those skilled in the art would think of, or by arbitrarily combining the components and functions of the embodiments without departing from the spirit of the present disclosure. Implemented forms are also included in this disclosure.

The blower of the present disclosure can be widely used in various products including products in the field of electrical equipment such as automobiles and the field of household electrical equipment.

1, 1A,

1B Electric blower

10, 10A Motor 11 Rotating shaft 12 Motor case

12a Case body

12b Case lid 13 Connector 14 Flange portion 14a Through hole 20 Impeller 21 Boss 22

Blade

30, 30A, 30B Fan case 30a First case 30b 2nd case 31 Intake port 32 Exhaust port 33 Ventilation path 34

Wall

35, 35A, 35B Support

35a Screw hole

36, 36A, 36B Connector placement part 40 Power line G1 1st support group G2 2nd support group

Claims

a motor having a rotating shaft and an outwardly protruding connector;
An impeller attached to the rotating shaft;
a fan case having an air passage through which outside air drawn in by the rotation of the impeller passes,
The motor is attached to an outer surface side of the fan case,
a plurality of connector arrangement portions are provided in which the connector can be arranged at predetermined positions between the fan case and the motor;
Electric blower.
Each of the plurality of connector arrangement parts is provided in the fan case,
The electric blower according to claim 1.
A wall into which the motor is fitted is provided on the outer surface of the fan case,
Each of the plurality of connector placement parts is a cutout part obtained by cutting out a part of the wall,
the connector protrudes outward from the notch;
The electric blower according to claim 2.
A plurality of struts supporting the motor are provided on the outer surface of the fan case,
The plurality of pillars are located inside the wall,
The height of the wall is higher than the height of the plurality of pillars,
The electric blower according to claim 3.
Three or more struts supporting the motor are provided on the outer surface of the fan case,
Each of the plurality of connector placement parts is a gap between two adjacent pillars among the three or more pillars,
The electric blower according to claim 2.
The three or more pillars are six or more pillars,
The six or more pillars include a first pillar group consisting of a combination of three or more of the pillars, and a second pillar group consisting of a combination of three or more of the pillars,
The three or more pillars constituting the first pillar group are provided at equal intervals in a circumferential direction around the rotation axis,
The three or more pillars constituting the second pillar group are provided at equal intervals in a circumferential direction around the rotation axis,
The three or more pillars constituting the first pillar group and the three or more pillars constituting the second pillar group are offset by a predetermined angle around the rotation axis so as not to be equally spaced.
6. The electric blower according to claim 5.
Each of the three or more pillars is provided with a circular hole,
The three or more pillars and the motor are fixed by inserting screws into the circular holes.
The electric blower according to claim 5 or 6.
Each of the three or more pillars is elongated in a circumferential direction centered on the rotation axis,
Each of the three or more pillars is provided with an elongated hole that is elongated in the circumferential direction,
The three or more pillars and the motor are fixed by inserting screws into the elongated holes.
The electric blower according to claim 5.
The ventilation path is formed outside the impeller.
The electric blower according to any one of claims 1 to 6 and 8.