JPH06180170A - Cooling fan fixing structure - Google Patents

Abstract

PURPOSE:To eliminate any interference between a cooling fan and some electrical device parts by a method wherein even if a model of the cooling fan or its maker is different, an outer frame constituting the cooling fan of which size is unified to a substantial same size is fixed to an electrical device frame through an L-shaped or a U-shaped fixing fitting. CONSTITUTION:In an electrical device in which a forced cooling is carried out under an arrangement of a cooling fan 2, one end of fixing fitting 1A formed in an L-shape in section is fixed to an outer side surface 2D having a width in an aeration direction of an outer frame 2A of the cooling fan 2 by a fixing screw 3A, and the other end of it is fixed to a frame 4 of the electrical device. The fixing fitting 1A is formed by performing a burring work at a threaded part of the fixing screw and forming a female thread at the threaded part. In addition, the fixing fitting can be formed to have a U-shaped section and in this case these two legs of the fixing fitting are fixed to both side surfaces of a width in an aeration direction of the outer frame 2A with a fixing screw 3A. In the case that the cooling fan 2 is replaced, necessity for designing or manufacturing the fixing fitting every time the cooling fan 2 is replaced is eliminated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling fan mounting structure for forcibly cooling an electric device.

[0002]

2. Description of the Related Art FIG. 5 is a perspective view showing the structure of a cooling fan,
FIG. 6 is a mounting structure diagram of a conventional cooling fan. In FIG. 6, the cooling fan 2 is an outer frame 2A that constitutes the cooling fan 2.
The one leg of the L-shaped mounting member 1 is attached to the inner side surface 2C having the width in the ventilation direction by the mounting screw 3, and the other leg of the mounting member 1 is attached to the frame 4 constituting the electric device. . FIG. 7 is a perspective view of the mounting member 1 shown in FIG.

As described above, the mounting bracket 1 is mounted on the inner side surface 2C of the outer frame 2A of the cooling fan 2 having the width in the ventilation direction. This is because burring is performed on one of the legs (which means that the edge of the hole made in the plate is expanded into a cylindrical shape. See Fig. 3), the female screw is cut, and the nut is omitted to streamline the assembly process. is there. When the mounting bracket 1 is mounted on the outer surface 2D of the outer frame 2A constituting the cooling fan 2 having the width in the ventilation direction, the G dimension shown in FIG. 5 is small, and therefore the screwdriver work for rotating the cooling fan mounting screw 3 cannot be performed. .

[0004]

As shown in the structure of the cooling fan in FIG. 5, the dimension E between the outer surfaces of the width of the outer frame of the cooling fan in the ventilation direction is different when the type or manufacturer of the cooling fan is different. However, the dimensions are almost the same, but the F dimension is not unified. Therefore, in such a conventional cooling fan mounting structure, when the cooling fan is disused or the manufacturer is changed for rationalization, if the cooling fan is replaced, the position of the cooling fan becomes F.
It may move by dimensional differences and the cooling fan may interfere with other parts of the electrical device. Also, depending on the type of cooling fan, there is a shape in which a mounting bracket cannot be mounted inside.

Therefore, an object of the present invention is to provide a cooling fan mounting structure in which the position of the cooling fan does not move even when the cooling fan is replaced with one of a different type or manufacturer, and the cooling fan does not interfere with other parts of the electric device. To provide.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to an electric device, which is provided with a cooling fan and is forcibly cooled, on an outer surface of a width of the outer frame constituting the cooling fan in the ventilation direction. , A mounting screw which is formed in an L-shape and has at least one leg having a burring portion of a mounting metal fitting having a burring portion is attached to the burring portion through the entire outer frame constituting the cooling fan. It is attached by screwing in, and the other leg is attached to the frame constituting the electric device. Alternatively, two parallel surfaces of a mounting bracket formed in a U shape and having a burring portion on one parallel surface are formed on the outer surface of the outer frame of the cooling fan in the ventilation direction, and the two parallel surfaces are cooled to the burring portion. It is installed by screwing in a mounting screw that penetrates the entire outer frame that makes up the fan.
Two parallel surfaces and one perpendicular surface are attached to a frame constituting an electric device.

[0007]

According to the structure of the present invention, even if the type or manufacturer of the cooling fan is different, the outer frame of the outer frame constituting the cooling fan having the same size and having the same size has an L-shaped or U-shaped outer surface. Since it can be attached to the frame that constitutes the electric device with the mounting bracket formed in a letter shape,
Even if the cooling fan is replaced with one of a different type or a different manufacturer, the position of the cooling fan does not shift and the cooling fan does not interfere with other parts of the electric device.

[0008]

FIG. 1 is a mounting structure diagram of a cooling fan using an L-shaped mounting bracket according to a first embodiment of the present invention. In FIG. 1, the cooling fan 2 has one leg of an L-shaped mounting bracket 1A attached to the outer surface 2D of the outer frame 2A constituting the cooling fan 2 in the width of the ventilation direction with the mounting screw 3A, and the other leg. Is attached to a frame 4 which constitutes an electric device. The mounting screw 3A is longer than the conventional mounting screw 3 shown in FIG. 6 and is tightened from the outer surface of the width of the outer frame 2A.

FIG. 2 is a perspective view of the L-shaped mounting member 1A, and FIG. 3 is a sectional view of the burring portion viewed from the line H--H of FIG. The mounting metal fitting 1A has a 1C portion burred to form a female screw, and a cooling fan is attached to this portion with the mounting screw 3A. FIG. 4 is a mounting structure diagram of a cooling fan using a U-shaped mounting bracket according to a second embodiment of the present invention. In FIG. 4, the U-shaped fitting 1B has a female thread cut by burring the 1C portion.

[0010]

According to the present invention, even if the cooling fan is replaced with one of a different type or manufacturer, the position of the cooling fan does not move, so that the cooling fan and other parts of the electric device do not interfere with each other. A structure is obtained, and there is no need to design and manufacture a mounting bracket that meets the required dimensions each time.

[Brief description of drawings]

FIG. 1 is a mounting structure diagram of a cooling fan using an L-shaped mounting bracket according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an L-shaped mounting bracket according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a burring portion viewed from the line HH in FIG.

FIG. 4 is a mounting structure diagram of a cooling fan using a U-shaped mounting bracket according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing the structure of a cooling fan.

FIG. 6 is a view showing a conventional cooling fan mounting structure.

FIG. 7 is a perspective view of an L-shaped mounting bracket.

[Explanation of symbols]

1A L-shaped mounting bracket 1B U-shaped mounting bracket 2 Cooling fan 2A Cooling fan outer frame 2D Cooling fan outer frame width side 3A Mounting screw 4 Frames that make up electrical devices

Claims (2)

[Claims] 1. An electric device including a cooling fan for forced cooling, wherein an outer frame constituting the cooling fan is formed in an L shape on an outer side surface of a width in a ventilation direction, and a burring portion is formed on at least one leg. The leg having the burring portion of the mounting bracket provided is attached to the burring portion by screwing a mounting screw penetrating the entire outer frame constituting the cooling fan, and the other leg constitutes an electric device. Cooling fan mounting structure characterized by being mounted on a frame. 2. The mounting metal fitting according to claim 1, which is formed in a U shape on an outer surface of a width of the outer frame of the cooling fan in the ventilation direction and has a burring portion on one parallel surface. The two parallel surfaces were attached to the burring portion by screwing a mounting screw that penetrates the entire outer frame forming the cooling fan, and the two surfaces parallel to each other were attached to the frame forming the electric device. Cooling fan mounting structure characterized by