JPH07151099A - Housing of axial flow fan motor - Google Patents

Abstract

PURPOSE:To use a small size tapping screw so as to aim at small size and high density by providing motor supporting plates each of which has plural installation holes on its wind barrel and end face, integrally through a plurality of spokes, and forming the installation hole on one end side out of the installation holes of the motor supporting plates on both ends in a diameter smaller than those of the holes on the other end side. CONSTITUTION:An axial flow fan motor is provided with a housing 1 which consists of a pair of motor supporting plates having a cylindrical bearing boss part 5 integrated thereto in their center through a plurality of spokes, and a wind barrel part 2 which is fixed between both motor supporting plates. A fan rotor 3 which is rotated through a driving circuit part 6 is rotatably housed in the housing 1. Respective motor supporting plates are fixed while holding the wind barrel 2 by a tapping screw which is inserted in four individual installation holes 18 which are provided on an outer circumferential part. In this case, the installation hole 18 on one end side (for example, the discharging side of wind) out of installation holes of the motor supporting plates on both ends is formed in a diameter smaller than those on the holes on the other end side (for example, the suction side of wind). It is thus possible to commonly use a compact system and a simple system.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a mounting portion in a housing of an axial fan motor.

[0002]

2. Description of the Related Art In recent years, various electric and electronic devices including a heating element have become smaller and higher in density, and a cooling axial flow fan motor used therein has also been demanded to be small and simple to install.

The housing of a conventional axial fan motor will be described below. FIG. 3 shows the external shape of a conventional axial fan motor. In FIG. 3, 31 is a housing, 32 is one side surface and a wind tunnel part, 3 is a fan rotor, 4 is a shaft, 5 is a bearing part, 6 is a drive circuit part, 7
Is a lead wire connection part, and 38 is a mounting hole of a housing used for mounting to a device.

A mechanism for mounting the housing of the axial fan motor configured as described above to the equipment will be described below.

FIG. 3 (a) is a surface for blowing out wind, FIG. 3 (b) is a surface seen from above, and FIG. 3 (c) is a suction surface, each having four mounting holes 8. The device was usually mounted by passing a screw through this mounting hole and fixing it with a nut and washer.

[0006]

However, in the above-mentioned conventional structure, extra parts, that is, mounting screws, washers and nuts, are required for mounting the fan motor to the equipment, and the number of assembling steps is also large. There is a problem in that not only can the device be made smaller and higher in density and simplification, but also the cost of the device will increase. Also, if the tapping screws with the appropriate outer diameter that secures the same mounting strength are used with the same diameter in all places, such as the conventional mounting holes, the outer diameter of the tapping screw is smaller than the inner diameter of the housing mounting hole. When using a tapping screw that cannot be attached and is compatible with the inner diameter of the housing, the diameter is large, so that the tightening torque becomes large and the housing mounting portion is broken. Further, in order to use an appropriate tapping screw, there is a problem that standardization cannot be achieved because a housing with a small mounting hole is separately provided.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a housing of an axial fan motor which can be easily attached to a device.

[0008]

To this end, the present invention provides two means. The first means is that the conventional mounting screw can be used by reducing the hole diameter on one side of the mounting holes provided on both end surfaces of the housing of the axial fan motor from the opposite side, and on the side where the hole diameter is reduced. A tapping screw can be used. This is because a small tapping screw can be used by reducing the hole diameter, and the lack of strength of the housing is solved.

A second means is to install two L-shaped protrusions on one side surface of the housing by inserting the protrusions into holes formed in a board or the like near the heating element inside the equipment so as to hook the protrusions. Is the way to do.

[0010]

With this construction, the first means enables the axial fan motor to be attached to the equipment by tapping screws, unlike the conventional method using screws, washers and nuts. The second means also eliminates the need for extra parts for mounting. As a result, it is possible to meet the demand for smaller size, higher density, and lower cost of equipment. Also, conventional methods can be shared.

[0011]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment. Figure 1
In the drawing, 1 is a housing, 2 is one side surface and a wind tunnel part, 3 is a fan rotor, 4 is a shaft, 5 is a bearing part, and 6
Is a drive circuit section, and 7 is a lead wire connection section. Further, 8 and 18 are mounting holes of the housing used for mounting to the device. (A) is an end face on the air discharge side,
(B) shows a side surface, and (c) shows a wind suction port.

Here, the mounting hole 18 on the (a) side has a smaller hole diameter than the mounting hole 18 on the (b) side, and can be mounted from the (a) surface by using a small tapping screw.

(Second Embodiment) FIG. 2 shows a second embodiment.

In FIG. 2, reference numeral 21 is a housing, 2 is one side surface and a wind tunnel portion, 3 is a fan rotor, 4 is a shaft, 5 is a bearing portion, 6 is a drive circuit portion, 7 is a lead wire connecting portion, and 8 is. It is a mounting hole of a housing used for mounting to a device. Also, 9 is a protrusion of the housing that can be used for mounting.

Here, the protrusion 9 of the housing has an L-shape having elasticity and can be attached by being hooked on the hole on the side to be attached.

[0017]

As described above, according to the present invention, as can be seen from the above-described embodiment, the axial flow fan motor is attached to the equipment by using the conventional screw, washer and nut. One is tapping. A method in which washers and nuts are eliminated by screws and a second method in which extra parts are not required by providing protrusions are provided, and a more compact and simplified method can be shared. by this,
It is possible to realize a small size, high density, and low cost as a total device that uses an axial fan motor.

[Brief description of drawings]

FIG. 1 is an external view of an axial fan motor according to a first embodiment.

FIG. 2 is an external view of an axial fan motor according to a second embodiment.

FIG. 3 is an external view of a conventional axial fan motor.

[Explanation of symbols]

 1,31 Housing 2,32 Wind tunnel part of housing 3 Fan rotor 4 Shaft 5 Bearing part 6 Drive circuit part 7 Lead wire connection part 8,18,38 Mounting hole 9 Mounting protrusion

Claims (5)

[Claims] 1. A motor support plate is integrally provided through a plurality of spokes, a cylindrical bearing boss portion is provided at a central portion of the motor support plate, a wind tunnel is provided at an outer peripheral portion, and four mounting holes are provided at both end surfaces. And a hole diameter of one side of the mounting hole is smaller than that of the opposite side of the mounting hole. 2. The housing for an axial fan motor according to claim 1, wherein the diameter of the attachment hole on the air discharge side is smaller than the diameter of the air intake side. 3. A motor support plate is integrally provided through a plurality of spokes, a cylindrical bearing boss portion is provided at the center of the motor support, a wind tunnel and four side surfaces are provided at the outer peripheral portion, and wind is provided at both end surfaces. A housing for an axial fan motor, which comprises a suction port and a discharge port, and is provided with a projection for attachment on one of the four side surfaces. 4. The protrusion for attachment is L having elasticity.
The housing for an axial fan motor according to claim 3, wherein the housing has a character shape. 5. A housing for an axial fan motor according to claim 3, wherein the mounting projections are provided at two locations diagonally on one side surface.