WO2006046330A1

WO2006046330A1 - Blower motor

Info

Publication number: WO2006046330A1
Application number: PCT/JP2005/011526
Authority: WO
Inventors: Takashi Kanai; Hiroki Matsushita; Emi Omori
Original assignee: Nidec Copal Electronics Corporation
Priority date: 2004-10-29
Filing date: 2005-06-23
Publication date: 2006-05-04
Also published as: US20070154333A1; JP2006129638A

Abstract

A blower motor has a case body in at least one side of which an air suction opening is formed and in a peripheral surface of which a discharge opening is formed; a motor using a fluid dynamic pressure bearing, installed either inside or outside the case body; a blade wheel that is fixed either to an outer peripheral section of the motor or to a rotating member in the case body of the motor, that is capable of, by its rotation, sucking air from the air suction opening and discharging it from a discharge opening, and on either of or each of both of upper and lower surfaces of which a cover plate is provided; pressure chambers of upper and lower sections of the blade wheel to which pressure is applied so as to be able to press the blade wheel in a thrust direction between the outer peripheral sections of the cover plates of the upper and lower sections or between the portions and the case body; and valve chambers of the upper and lower sections for discharging pressurized air in the pressure chambers to the outside. The blower motor takes advantage of a fluid dynamic pressure bearing, and while it is rotated, the blade wheel is reliably prevented from coming into contact with the case body.

Description

Specification

Blower motor

Technical field

[0001] The present invention relates to a blower motor.

Background art

[0002] A conventional blower motor has a case body in which an air suction port is formed in a lid plate on one side surface and a discharge port is formed in a peripheral wall, a motor using a fluid dynamic pressure bearing attached to the case body, On the anti-air suction port side, which is fixed to the rotating member of the motor so as to be positioned on the outer peripheral portion of the motor, can be sucked from the air suction port by rotation and discharged from the discharge port. It is composed of an impeller using a cover plate.

[0003] The blower motor configured as described above has the disadvantage that the impeller rotates to the air suction port <atmospheric pressure <discharge port, the impeller is pulled toward the air suction port, and the impeller contacts the lid plate. was there. In order to eliminate this drawback, a strong thrust holding mechanism such as a ball bearing is required.

Patent Document 1: None

Disclosure of the invention

Problems to be solved by the invention

[0004] In view of the above-described conventional drawbacks, the present invention makes use of the characteristics of a fluid dynamic pressure bearing and a blower motor that can reliably prevent movement of the impeller in contact with the case body by rotation. For the purpose of providing.

[0005] The above and other objects and novel features of the present invention will become more fully apparent when the following description is read in conjunction with the accompanying drawings.

However, the drawings are for explanation only and do not limit the technical scope of the present invention.

Means for solving the problem

In order to achieve the above object, the present invention provides a case body in which an air suction port is formed on at least one side surface and a discharge port is formed on a peripheral wall, and the case body or the case body is attached to the outside. A motor using a fluid dynamic pressure bearing, and an outer peripheral portion of the motor or a rotating member of the motor in the case body, and sucking air from the air suction port by rotation and from the discharge port. Between the impeller provided with a force bar plate on either or both of the upper and lower surfaces that can be discharged and the outer periphery of the cover plate on the upper and lower parts of the impeller, the heel is between the case body of the part, The upper and lower pressure chambers to which pressure is applied so that the impeller can be pressed in the thrust direction, and the upper and lower valve chambers for discharging the pressure air in the upper and lower pressure chambers to the outside.

The blower motor is configured. The invention's effect

As is apparent from the above description, the present invention has the following effects.

[0008] (1) A case body in which an air suction port is formed in at least one side surface and a discharge port is formed in a peripheral wall, and a motor using a fluid dynamic pressure bearing attached to the case body or outside the case body The upper and lower surfaces fixed to the outer peripheral portion of the motor or the rotating member of the motor in the case body can draw air from the air suction port by rotation and can be discharged from the discharge port. On the other hand, there is! /, Which pushes the impeller in the thrust direction between the impeller provided with a cover plate on both sides and the outer peripheral portion of the cover plate on the upper and lower parts of this impeller or the body of the case. The upper and lower pressure chambers to which pressure can be applied and the upper and lower valve chambers for discharging the pressure air in the upper and lower pressure chambers to the outside are constituted by the rotation of the impeller. Touch the case body Movement in the thrust direction can be prevented between the pressure chamber and the valve chamber.

Accordingly, it is possible to reliably prevent the impeller and the case body from being damaged by utilizing the characteristics of the fluid dynamic pressure bearing.

[0009] (2) According to the above (1), it is only necessary to form the pressure chamber and the valve chamber, which can be implemented without increasing the number of parts.

[0010] (3) According to the above (1), the impeller can be rotated at a balanced position by the movement of the upper and lower valve chambers in the opening and closing direction.

Therefore, stable ventilation can be achieved.

[0011] (4) Claims 2 and 3 can provide the same effects as the above (1) to (3). Brief Description of Drawings

1] A plan view of the best first embodiment for carrying out the present invention.

2] Front view of the best first embodiment for carrying out the present invention.

3] A bottom view of the best first embodiment for carrying out the present invention.

FIG. 4 is a sectional view taken along line 4 4 in FIG.

FIG. 5 is an explanatory diagram of the best case of the first embodiment for carrying out the present invention.

6] An explanatory diagram of the motor of the best first embodiment for carrying out the present invention.

7] An explanatory diagram of the impeller of the best first embodiment for carrying out the present invention.

[8] FIG. 8 is a diagram for explaining the operation in the thrust direction of the impeller of the best first embodiment for carrying out the present invention.

[9] A plan view of a second embodiment for carrying out the present invention.

FIG. 10 is a sectional view taken along line 10-10 in FIG.

FIG. 11 is an explanatory view of an impeller of a second embodiment for carrying out the present invention.

[12] A plan view of a third embodiment for carrying out the present invention.

FIG. 13 is a cross-sectional view taken along line 13-13 in FIG.

FIG. 14 is an explanatory view of an impeller according to a third embodiment for carrying out the present invention.

[15] A plan view of a fourth embodiment for carrying out the present invention.

FIG. 16 is a cross-sectional view taken along line 16-16 in FIG.

圆 17] Explanatory drawing of the impeller of the 4th form for implementing this invention.

[18] A plan view of a fifth embodiment for carrying out the present invention.

FIG. 19 is a sectional view taken along line 19 19 in FIG.

圆 20] An explanatory diagram of an impeller of a fifth embodiment for carrying out the present invention.

21] A plan view of a sixth embodiment for carrying out the present invention.

FIG. 22 is a sectional view taken along line 22-22 in FIG.

圆 23] Explanatory drawing of the impeller of the 6th form for implementing this invention.

FIG. 24 is a plan view of a seventh embodiment for carrying out the present invention.

FIG. 25 is a cross-sectional view taken along line 25-25 in FIG.

[26] An explanatory view of an impeller of a seventh embodiment for carrying out the present invention. 圆 27] A plan view of an eighth embodiment for carrying out the present invention.

FIG. 28 is a sectional view taken along line 28-28 in FIG.

FIG. 29 is an explanatory diagram of an eighth embodiment of the motor for carrying out the present invention. _C圆 30] A plan view of the ninth embodiment for carrying out the present invention.

圆 31] A front view of a ninth embodiment for carrying out the present invention.

FIG. 32 is a sectional view taken along line 32-32 in FIG.

Explanation of symbols

1, 1A, IB ゝ 1C ゝ 1D, IE ゝ IF ゝ 1G, 1H: Blower motor,

2: Air suction port 3: Cover plate,

4: peripheral wall, 5: discharge port,

6, 6A, 6B, 6C, 6D, 6E: Case body,

7: Motor,

8, 8A, 8B, 8C, 8D, 8E, 8F: Impeller,

9: Screw, 10: Insertion hole,

11: Mounting part, 12: Case body:

13: Lower air suction port, 14: Base plate,

15: Shaft, 16: Small gap,

17: Sleeve, 18: Rotor,

19: Coreless corrugated continuous coil, 20: Knock yoke,

21: Hub as a rotating member, 22: Recess,

23: Thrust magnet, 24: Thrust magnet,

25: Boss part, 26: Through hole,

27, 27A, 27B, 27C: Upper and lower panels

28: Feather, 29: Recess,

30: Upper and lower pressure chambers,

31, 31A, 31B, 31C: upper and lower noble chambers,

32: inclined surface, 33: inclined surface,

34: curved surface, 35: curved surface, 36: inclined surface, 37: inclined surface,

38: peripheral wall, 39: cover body.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail with reference to the best mode for carrying out the present invention shown in the drawings.

In the first best mode for carrying out the present invention shown in FIG. 1 to FIG. 8, 1 is a blower motor of the present invention, and this blower motor 1 has an air suction port 2 formed at substantially the center of one side surface. A case body 6 that is covered with the covered cover plate 3 and has a discharge port 5 formed in the peripheral wall 4; a motor 7 that uses a fluid dynamic pressure bearing that is mounted in the case body 6 and is driven at high speed rotation; The air is sucked from the air suction port 2 of the case body 6 by rotation and fixed to the rotating member of the motor 7 so as to be positioned on the outer peripheral portion of the motor 7, and is discharged from the discharge port 5. It is made up of 8 impellers that can be used.

[0016] The case body 6 has mounting portions 11 and 11 in which insertion holes 10 such as screws 9 are formed in the outer peripheral portion, a case body main body 12 having a peripheral wall 4 in which a discharge port 5 is formed, and the case A lower air suction port 13 formed in the bottom plate 12a of the body body 12 and a lid plate 3 formed with an air suction port 2 covering the upper opening portion 12b of the case body body 12 are configured.

The motor 7 has a base plate 14 provided with a motor drive circuit (not shown) fixed to the inner bottom surface of the case body 12 of the case body 6, and projects upward from the base plate 14. A shaft 15 fixed in such a manner, a sleeve 17 disposed on the outer periphery of the shaft 15 via a minute gap 16, a rotor 18 on which a permanent magnet attached to the outer periphery of the sleeve 17 is disposed, and The coreless corrugated continuous coil 19 attached to the base plate 14 so as to be positioned on the outer peripheral portion of the rotor 18, the back yoke 20 provided so as to be positioned on the outer peripheral portion of the coreless corrugated continuous coil 19, and the sleeve 17. A hub 21 as a rotating member that supports the rotor 18 and the back yoke 20 and covers the upper portion of the shaft 15 and the outer periphery of the back yoke 20, and a hub 21 that covers the shaft 15. And fixed to a ring-shaped thrust magnet 23 at the top of the recess 22, that consists of said ring-shaped thrust magnet 24 fixed to an upper portion of the shaft 15 so as to face the thrust magnet 23. [0018] The impeller 8 protrudes outward from the upper and lower end portions of a boss portion 25 fitted and fixed to an outer peripheral portion of a hub 21 as a rotating member of the motor 7 through a plurality of through holes 26, 26. Flange-shaped upper and lower cover plates 27, 27, a large number of arcuate blades 28 that divide the upper and lower cover plates 27, 27 into a large number, and the outer periphery of the upper and lower cover plates 27, 27 Recesses 29 and 29 are provided between the portion near the portion and the inner wall surfaces 6a and 6a of the case body 6 so that pressure is applied so that the upper and lower cover plates 27 and 27 can be pressed in the thrust direction. The upper and lower pressure chambers 30 and 30 are formed and formed, and the upper and lower pressure chambers 30 and 30 of the impeller 8 and a plurality of through holes 26 and 26 in the upper and lower cover plates 27 and 27 are formed. The upper and lower valve chambers 31 and 31 are installed between the two.

In the blower motor 1 configured as described above, when the motor 7 is driven, the impeller 8 rotates at a high speed, and air is sucked from the air suction port 2 and the lower air suction port 13 of the case body 6, and the discharge port 5 It is possible to discharge more, and it is possible to blow high pressure with a large air volume even if it is small.

At this time, the motor 7 has the rotor 18 and the coreless corrugated continuous coil 19 disposed on the outer peripheral portion of the sleeve 17 disposed on the outer peripheral portion of the shaft 15 through the minute gap 16 and the permanent magnet having a rotating structure. The harmful magnetic force applied to the shaft 15 and the sleeve 17 is completely eliminated.

Therefore, basically, it is sufficient that the bearing rigidity is sufficient to support the weight of the rotor 18.

In addition, even if the impeller 8 rotates at a high speed, if there is a difference in the pressure applied to the upper and lower pressure chambers 30 and 30, the impeller 8 moves in the direction of lower pressure, and the pressure in the higher pressure chamber 30 The operation of discharging from the valve chamber 31 communicating with the pressure chamber 30 to the outside is repeated, and the impeller 8 rotates at a balanced position.

[Different forms for carrying out the invention]

Next, different modes for carrying out the present invention shown in FIGS. 9 to 32 will be described. In the description of the different modes for carrying out the present invention, the same components as those in the best mode for carrying out the present invention are denoted by the same reference numerals, and redundant description is omitted. To do.

[0021] In the second embodiment for carrying out the present invention shown in FIG. 9 to FIG. The upper and lower guide plates 27A, 27A in which the inclined surfaces 32, 32 are formed so that the upper and lower valve chambers 31A, 31A are inclined surfaces are mainly different from the best mode for carrying out the first embodiment. The impeller 8A, which has a tip with a smaller thickness than the base, and lower air suction to the bottom of the part corresponding to the inclined surfaces 32, 32 of the upper and lower guide plates 27A, 27A of this impeller 8A Since the inclined surfaces 33 and 33 are formed on the inner wall surface of the case body 6A without a mouth, the blower motor 1A configured in this way is the same as the best first embodiment for carrying out the present invention. The effect is obtained.

The third embodiment for carrying out the present invention shown in FIGS. 12 to 14 is mainly different from the second embodiment for carrying out the present invention in that the outer peripheral portion protrudes in a convex shape. The blower motor 1B configured using such an impeller 8B and the case body 6B is used in that the impeller 8B and the case body 6B forming the upper and lower valve chambers 31B and 31B in a planar state are used. Also, the same effect as the second embodiment for carrying out the present invention can be obtained.

The fourth embodiment for carrying out the present invention shown in FIGS. 15 to 17 is mainly different from the second embodiment for carrying out the present invention in that an upper pressure chamber 30 and a valve are The blower motor 1C configured as described above is used to implement the present invention in that the chamber 31 and the chamber 31 are formed in a flat state, and pressure can be discharged from the upper part by the weight of the impeller 8C. The same effect as in the second aspect can be obtained.

[0024] The fifth embodiment for carrying out the present invention shown in Figs. 18 to 20 is mainly different from the third embodiment for carrying out the present invention in that the upper pressure chamber 30 and the valve are The blower motor 1D configured as described above is used to implement the present invention in that the chamber 31 and the chamber 31 are formed in a flat state and the pressure from the upper part can be discharged by the weight of the impeller 8D. The same effect as that of the third aspect can be obtained.

The sixth embodiment for carrying out the present invention shown in FIGS. 21 to 23 is mainly different from the second embodiment for carrying out the present invention in that the upper and lower valve chambers 31C, 31C This is because the impeller 8E using the upper and lower cover plates 27B and 27B formed with curved surfaces 34 and 34 so as to be curved, and the case body 6C formed with curved surfaces 35 and 35 on the inner wall surface are used. Even with the blower motor 1E configured as described above, the same effects as those of the second embodiment for carrying out the present invention can be obtained. [0026] The seventh embodiment for carrying out the present invention shown in Figs. 24 to 26 is mainly different from the second embodiment for carrying out the present invention in that the thickness of the tip portion is sequentially An impeller 8F formed to be small, and a guide body 27C, upper and lower guide plates 27C, 27C of the impeller 8F, and a case body 6D having an inner wall that becomes an inclined surface 37, 37 smaller than 36 In the point of use, even with the blower motor 1F configured as described above, the same effects as those of the second embodiment for carrying out the present invention can be obtained.

[0027] The eighth embodiment for carrying out the present invention shown in Figs. 27 to 29 differs from the second embodiment for carrying out the present invention mainly in that a motor is provided on the bottom surface of case body 6A. Even with the blower motor 1G configured in this manner, the same operational effects as those of the second embodiment for carrying out the present invention can be obtained in that the 7 is attached.

[0028] The ninth embodiment for carrying out the present invention shown in FIGS. 30 to 32 is mainly different from the second embodiment for carrying out the present invention in that the air suction port 2 has a peripheral wall 38. In the point that the case body 6E using the cover body 39 formed in the above is used, the blower motor 1H configured using the case body 6E formed in this way is used in the second embodiment for carrying out the present invention. The same effect as that of the embodiment can be obtained.

[0029] In the description of the embodiment for carrying out the present invention, the description has been made on the use of the impeller in which the cover plates are provided on both the upper and lower surfaces. However, the present invention is not limited to this. An impeller provided with a cover plate on either side may be used. In this case, it is sufficient if the impeller is urged toward the cover plate by its own weight or magnet suction (repulsive force).

The present invention is used in the industry for manufacturing blower motors.

Claims

The scope of the claims

[1] A case body in which an air suction port is formed on at least one side surface and a discharge port is formed on a peripheral wall, a motor using a fluid dynamic pressure bearing attached to the case body or the outside of the case body, and an outer periphery of the motor A cover plate is provided on either or both of the upper and lower surfaces. The cover plate is fixed to a rotating member of the motor in the casing or the case body, and can be sucked from the air suction port by rotation and discharged from the discharge port. The upper and lower pressure chambers in which pressure is applied so that the impeller can be pressed in the thrust direction between the impeller and the outer peripheral portion of the upper and lower cover plates of the impeller or the inside of the case. And a blower motor comprising an upper and lower valve chamber for discharging the pressure air in the upper and lower pressure chambers to the outside.

[2] The blower motor according to claim 1, wherein the upper and lower valve chambers are formed by forming a case inner wall surface and a cover plate of an impeller, and forming upper and lower portions into inclined surfaces or curved surfaces.

[3] The upper and lower valve chambers are formed on the case body wall surface and the lower part of the impeller cover plate on an inclined surface or a flat surface, and the upper part is formed in a shape capable of restricting movement in the thrust direction by the weight of the impeller. The blower motor according to claim 1, wherein: