Axial flow fan motor frame

Abstract

To provide a metal frame for an axial fan motor that can increase airflow while maintaining deformation resistance against heat and pressure loads, even for frames for axial fan motors of the same size. A frame for an axial flow fan motor includes a cylindrical portion that houses fan blades, a flange provided at the upper end of the cylindrical portion, and a rib extending across the bottom of the cylindrical portion, The frame for an axial flow fan motor is configured such that at least the cylindrical portion is made of metal and the thickness of the thinnest portion is 0.6 mm or less.

Description

[Technical Field]

[0001] The present invention relates to a metal frame for an axial fan motor (hereinafter simply referred to as "frame") that allows for increased airflow while maintaining resistance to deformation due to thermal and pressure loads, even for frames for axial fan motors of the same size. [Background technology]

[0002] Conventional axial flow fan motors have resin-molded frames, and from the standpoint of injection molding and deformation resistance, the thickness of the thin parts must be 1 mm or more. For example, as shown in Non-Patent Document 1, if the length and width are 40 mm, the thickness of the thin parts on the left and right sides of the frame is 1 mm, and the inner diameter of the frame is 38 mm, which limits the diameter of the fan blades to less than that. In other words, considering a clearance of about 0.5 mm between the frame and the blades, the maximum diameter of the fan blades is about 37 mm.

[0003] Increasing the diameter of the fan blades and increasing the airflow volume would be impossible with a frame made of resin due to limitations in the molding process and deformation during use. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] https: / / www.nipponkeiki.co.jp / products / dc-fan-motor / dc-axial-flow / lf40k12 / Summary of the Invention [Problem to be solved by the invention]

[0005] Therefore, the purpose of this application is to provide a metal frame for an axial fan motor that allows for increased airflow while maintaining resistance to deformation due to thermal and pressure loads, even for frames of the same size. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides (1) A frame for an axial flow fan motor, comprising: a cylindrical portion for accommodating fan blades; a flange provided at an upper end of the cylindrical portion; and a rib extending across a bottom of the cylindrical portion, A frame for an axial fan motor, wherein at least the cylindrical portion is made of metal and the thickness of the thinnest portion is 0.6 mm or less. (2) The frame for an axial flow fan motor according to (1), wherein the cylindrical portion, the flange, and the rib are integrally formed from a metal plate. (3) The frame for an axial fan motor described in (2) is characterized in that the integral formation is a press process in which the cylindrical portion is formed by drawing sheet metal using a mold, and then the ribs, flanges, and mounting holes are formed by punching and cutting. (4) a cylindrical portion for accommodating the fan blades; a flange provided at the upper end of the cylindrical portion; and a rib extending across the bottom of the cylindrical portion. A metal frame for an axial flow fan motor, A manufacturing method for a frame for an axial fan motor, characterized in that the flange and the cylindrical portion with a bottom are formed by drawing a 0.6 mm thick metal sheet using a die, and then the ribs, flange, and flange mounting holes are formed by punching and cutting. (5) The method for manufacturing a frame for an axial flow fan motor according to (4), wherein the metal is an iron-based material. (6) A frame for an axial fan motor according to any one of (1) to (3), characterized in that the size of the frame for an axial fan motor is 50 mm or less in length and width if square, and 50 mm or less in diameter if circular. (7) In an axial flow fan motor, Frame, An axial fan motor characterized by using the frame for an axial fan motor according to any one of (1) to (3). The structure is as follows. [Effects of the Invention]

[0007] The present invention has the above-described configuration, and therefore has the following advantages: Since the cylindrical portion of the frame, or the entire frame, is formed from sheet metal, even if the wall thickness is thin, it has sufficient strength equal to or greater than that of conventional units of the same size, and can increase the airflow compared to conventional units. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front perspective view of an axial fan motor using a frame for an axial fan motor according to the present invention; [Figure 2] 1 is a rear perspective view of an axial fan motor using a frame for an axial fan motor according to the present invention; [Figure 3] 1 is a partial cross-sectional view of an axial fan motor using a frame for an axial fan motor according to the present invention. [Figure 4] 1 is a front view of a frame for an axial fan motor according to the present invention; [Figure 5] FIG. 2 is a rear view of the frame for the axial fan motor according to the present invention. [Figure 6] 1 is a left side view of a frame for an axial fan motor according to the present invention. [Figure 7] 1 is a right side view of a frame for an axial fan motor according to the present invention. FIG. [Figure 8] 1 is a plan view of a frame for an axial fan motor according to the present invention; [Figure 9] FIG. 2 is a bottom view of the frame for the axial fan motor according to the present invention. [Figure 10] 1 is a front perspective view of a frame for an axial fan motor according to the present invention; [Figure 11] 1 is a rear perspective view of a frame for an axial fan motor according to the present invention; [Figure 12]1 is a cross-sectional view taken along line AA of a frame for an axial fan motor according to the present invention. [Figure 13] 1 is a front perspective view of a base member fitted into a hole in a frame for an axial fan motor according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the following examples. [Example]

[0010] As shown in Figures 1 to 13, the frame 1 for an axial fan motor of the present invention comprises a cylindrical portion 2 that houses fan blades 9, a flange 3 provided at the upper end of the cylindrical portion 2, and a rib 4 that runs across the bottom of the cylindrical portion 2.

[0011] The fan blade 9 consists of a rotor 9a that houses a cylindrical magnet 9c inside and multiple vanes 9b that protrude from the rotor 9a. Mounting holes 3a are drilled in the flange 3, and screws or the like are inserted into the mounting holes 3a to secure the axial fan motor frame 1 to the mounting location.

[0012] The spaces between the ribs 4 form air flow paths 4a, and a hole 4b is formed in the center, with the ribs 4 arranged in a circle. As shown in Figure 12, a resin base material 5 is fitted into the hole 4b. As shown in Figure 3, a substrate 7 is fitted into the base material 5, and a housing 6 is attached. The shapes of the flange 3 and ribs 4 can be changed as appropriate depending on the purpose and use.

[0013] As shown in the partial cross section of Figure 3, the cylindrical section 2 houses the fan blades 9, which consist of a rotating rotor 9a with multiple blades 9b, the motor section, and the substrate 7. The arrangement and function of these components are the same as in conventional axial fan motors. The blades 9b, substrate 7, windings, and stator 10 are indicated by two-dot chain lines. The fan blades 9 can also be modified as appropriate depending on the purpose and application.

[0014] As shown in Figure 3, in the frame 1 for an axial fan motor of the present invention, at least the cylindrical portion 2 is made of metal, and the thickness of the thinnest part T is 0.6 mm or less. If the distance (clearance 11a) between the tip of the vane 9b and the inside of the cylindrical portion is set to the same distance as in a conventional axial fan motor, the diameter D of the fan blade 9 can be made larger than in the conventional case.

[0015] As a result, the air volume can be increased even for frames for axial fan motors of the same size. And even though the thinnest part is less than 0.6 mm thick, the metal frame is stronger than conventional resin frames. The metal for the cylindrical portion 2 is formed by cutting from a metal block, pressing sheet metal, bending, or other processes.

[0016] More preferably, the axial fan motor frame 1 of the present invention has the cylindrical portion 2, flange 3, and rib 4 integrally formed from sheet metal. Forming them integrally reduces the number of parts, manufacturing and assembly steps, and keeps manufacturing costs low.

[0017] The integral molding of the axial fan motor frame 1 can be exemplified by press working, in which the cylindrical portion 2 is formed by drawing a metal sheet using a die, followed by punching and cutting to form the ribs 4, flange 3, and mounting holes 3a. More specifically, a 0.6 mm thick metal sheet is drawn using a die to form the flange 3 and bottomed cylindrical portion 2, followed by punching and cutting to form the ribs 4, flange 3, and mounting holes 3a for the flange.

[0018] The metal type of the sheet metal is preferably an iron-based material, more preferably SPC (cold rolled steel plate). Other materials that can be used include aluminum and magnesium.

[0019] The frame 1 for an axial fan motor of the present invention exhibits a significant effect of increasing air volume when it is square and has a length and width of 50 mm or less, and a diameter of 50 mm or less when it is circular.

[0020] The axial fan motor frame 1 of the present invention can be replaced with a conventional frame, and by increasing the diameter of the fan blades 9, it becomes an axial fan motor 11 that has the effect of increasing air volume even with the same size. Apart from slightly increasing the diameter of the fan blades 9, the internal structure, including the circuit board 7 and motor section (shaft 8, windings and stator 10), is the same as that of a conventional axial fan motor. [Explanation of symbols]

[0021] 1. Frame for axial fan motor 2 Cylindrical part 3 flange 3a mounting hole 4. Ribs 4a Flow path 4b hole 5 Sole material 6. Housing 7. Circuit Board 8 axes 8a thrust bearing 8b Bearing 9 Fan Blades 9a Rotor 9b Feather 9c Magnet 10 Windings and Stator 11 Axial fan motor 11a Clearance

Claims

1. A frame for an axial flow fan motor, comprising: a cylindrical portion for accommodating fan blades; a flange provided at an upper end of the cylindrical portion; and a rib extending across a bottom of the cylindrical portion, A frame for an axial flow fan motor, wherein at least the cylindrical portion is made of metal and the thickness of the thinnest portion is 0.6 mm or less.

2. 2. The frame for an axial flow fan motor according to claim 1, wherein the cylindrical portion, the flange, and the rib are integrally formed from a metal plate.

3. 3. The frame for an axial fan motor according to claim 2, wherein the integral formation is performed by pressing, in which the cylindrical portion is formed by drawing a metal sheet using a die, and then the ribs, flanges, and mounting holes are formed by punching and cutting.

4. a cylindrical portion for accommodating the fan blades; a flange provided at the upper end of the cylindrical portion; and a rib extending across the bottom of the cylindrical portion. A metal frame for an axial flow fan motor, A method for manufacturing a frame for an axial flow fan motor, characterized in that the flange and the cylindrical portion with a bottom are formed by drawing a 0.6 mm thick metal sheet using a mold, and then the ribs, flange, and flange mounting holes are formed by punching and cutting.

5. 5. The method for manufacturing a frame for an axial flow fan motor according to claim 4, wherein the metal is an iron-based material.

6. The frame for an axial fan motor according to any one of claims 1 to 3, wherein the size of the frame for an axial fan motor is 50 mm or less in length and width if it is square, and 50 mm or less in diameter if it is circular.

7. In an axial flow fan motor, Frame, An axial fan motor, characterized in that the frame for an axial fan motor according to any one of claims 1 to 3 is used.

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