JP6533375B2 - Fan device - Google Patents

Description

  The present invention relates to a blower fan apparatus using a motor.

  In the fan unit, in order to obtain the safety standard of CSA and cUL, it is necessary to show the direction of air flow to the product. For example, in the case of an axial fan, in many cases, a mark indicating the axial direction, which is the direction of air flow, is indicated by an arrow on the housing (see Patent Document 1).

JP, 2014-98331, A

  When molding a housing using a mold, the extraction direction of the mold is often the axial direction. In the case where the mark indicating the blowing direction is provided as a convex mark in a direction orthogonal to the axial direction, a mold part that slides in the orthogonal direction is separately required. The increase in mold parts causes a problem that the structure is complicated and the manufacturing cost is increased. As a method of providing the mark on the housing, a method of sticking a label on which the mark is printed on the housing, or a method of providing the mark directly on the housing by printing or the like can be adopted. However, the method of attaching the label to the housing and the method of providing the mark directly on the housing have a problem that the manufacturing cost increases because it is necessary to separately provide a process and equipment.

  One aspect of the present invention is made in view of the above-mentioned problem, and it aims at providing a fan device which can control increase of manufacturing cost.

  One aspect of the fan device according to the present invention comprises a motor having a rotary shaft extending in the axial direction, a blade fixed to the rotary shaft, and a support molded of resin or metal and supporting the motor. A fan device including a housing, wherein the first convex mark is integrally provided on the housing and indicates the air flow direction when the motor rotates, and is provided on the housing and intersects the air flow direction The first convex mark is positioned at the end on one side and the end on the other side with respect to the direction orthogonal to the air flow direction The distance to the portion changes in the air flow direction, and the parting line passes through the position at which the distance at the first convex mark is the largest. Characterized in that it.

  According to one aspect of the present invention, there is provided a fan device capable of suppressing an increase in manufacturing cost even when the mark is provided.

It is a figure showing an embodiment of the present invention, and is an exploded perspective view of a fan device. It is the elements on larger scale of the support part in which the 1st convex-shaped mark was provided. It is the figure which cut the line AA in FIG. It is a figure which shows a 1st convex-shaped mark and a 2nd convex-shaped mark. It is a figure which shows another form of a 1st convex-shaped mark. It is a figure which shows another form of a 1st convex-shaped mark. It is a figure which shows another form of a 1st convex-shaped mark. It is a figure which shows another form of a 1st convex-shaped mark.

  Hereinafter, embodiments of the fan device of the present invention will be described with reference to FIGS. 1 to 8. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each structure intelligible, a scale, the number, etc. in an actual structure and each structure may be varied.

  FIG. 1 is an exploded perspective view of a fan device 10. The fan device 10 includes a motor 20, an impeller 31 and a housing 50. The fan device 10 is an axial flow fan in which the impeller 31 is rotated about the axis AX by the rotation of the motor 20 and the air is blown with the axis AX direction as the air flow direction. The air flow direction in the present specification indicates the direction in which air flows as a whole by the rotation of the motor 20. That is, the air flow direction refers to a direction from the direction in which air is taken in by the fan device 10 toward the direction in which the air is discharged. For example, in FIG. 1 described below, the direction from the upper side to the lower side in the drawing is the air flow direction.

  In the drawing, an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system, and a first convex mark 60 described later centering on the axis AX is provided with the axis AX direction of the rotation axis 21 shown in FIG. In the following description, the X-axis direction is taken as the direction in which the X-axis direction is taken, and the direction orthogonal to the Z-axis direction and the X-axis direction is taken as the Y-axis direction.

  The impeller 31 includes a hub 32 and blades 30. The hub 32 has a cylindrical shape centered on the axis AX. The hub 32 is open at the end on the -Z side. The hub 32 is closed at the + Z side end with a lid 33. The vanes 30 extend radially outward of the rotary shaft 21 and are integrally fixed to the outer peripheral surface of the hub 32 at a constant pitch in the circumferential direction. Each blade 30 is provided to be inclined with respect to the direction of the axis AX. The vanes 30 are integrally connected by a cylindrical portion 34 concentric with the hub 32 and having a diameter larger than the outer diameter of the hub 32 and smaller than the maximum diameter of the vanes 30.

  The motor 20 includes a rotary shaft 21, a rotor 22, a stator 23 and a rotary support 24. The rotation shaft 21 is fixed to the inside of the hub 32 so as to extend in the direction of the axis AX. As described above, the blades 30 are fixed to the hub 32. Accordingly, the blades 30 are fixed to the rotation shaft 21. The rotation shaft 21 has an end on the −Z side facing the opening of the hub 32, and an end on the + Z side is fixed to the lid 33. The rotation support portion 24 includes a hole 25 extending in the axis AX direction. The rotation support part 24 has a bearing which is not shown in figure as an example. The rotation support portion 24 rotatably supports the rotation shaft 21 inserted into the hole 25 around the axis AX by a bearing.

  The stator 23 is annularly disposed on the outer side in the radial direction centering on the axis AX than the rotation support portion 24. The stator 23 is supported by a support 40 described later in the housing 50. The rotor 22 is annularly disposed outside the stator 23 in the radial direction centering on the axis AX. A gap is provided between the inner peripheral surface of the rotor 22 and the outer peripheral surface of the stator 23. The rotor 22 is inserted into the hub 32. The outer peripheral surface of the rotor 22 is fitted to the inner peripheral surface of the hub 32 and fixed to the hub 32.

  The housing 50 includes a base plate 51, a support 40 and an extension 52. The housing 50 is molded of resin or metal. The base plate 51 is disposed in parallel with the XY plane. The base plate 51 is provided in a substantially rectangular shape. The base plate 51 is provided with a hole 53 having a circular shape in plan view and centered on the axis AX, penetrating in the thickness direction. FIG. 3 is a cross-sectional view taken along line AA in FIG. On the surface 51b on the -Z side of the base plate 51, a frame 54 that is located around the hole 53 and protrudes to the -Z side is provided. The frame portion 54 is cylindrically disposed around the blade 30. On the surface 51 a on the + Z side of the base plate 51, a cylindrical portion 55 protruding to the + Z side is provided outside the hole 53 in the radial direction. The cylindrical portion 55 is provided around the axis AX.

  The extending portion 52 extends inward from the end on the −Z side of the inner peripheral surface of the frame 54. The extension portion 52 supports the support portion 40 on the inner side. In the extension portion 52, a vane 52B is provided on the rib 52A. The stationary blade 52B is provided on the counterclockwise direction side of the rib 52A centered on the axis AX. A plurality of extending portions 52 are provided around the axis AX. The extending portions 52 are provided radially at four intervals of 90 degrees. The extension portion 52 positions the support portion 40 at a position coaxial with the hole portion 53 and the frame portion 54.

  The support 40 supports the motor 20. That is, the housing 50 includes the support 40 that supports the motor 20. The support portion 40 includes a cylindrical portion 45 and a bottom portion 46. The cylindrical portion 45 has a cylindrical shape centered on the axis AX. The end on the + Z side of the cylindrical portion 45 is open. The bottom portion 46 closes the end on the −Z side of the cylindrical portion 45. The support portion 40 has a side surface 41 facing radially outward. A first convex mark 60 is provided on the + X side of the side surface 41. The first convex mark 60 is located between the two extending portions 52 in the direction around the axis AX, ie, in the circumferential direction.

FIG. 2 is a partially enlarged view of the support portion 40 provided with the first convex mark 60.
The first convex mark 60 is located on the side surface 41 of the support 40. The side surface 41 includes a groove 42 extending in the axis AX direction. The first convex mark 60 is provided inside the groove 42. The surface of the first convex mark 60 projecting from the inside of the groove 42 has the same distance from the axis AX as the distance from the axis AX of the side surface 41.

  The first convex mark 60 includes arrow tips 61 and straight portions 62 adjacent in the Z-axis direction, which is the air flow direction. The arrowhead portion 61 includes a first portion 61a and a second portion 61b adjacent in the Z-axis direction. The width of the first portion 61 a in the Y-axis direction orthogonal to the air flow direction is constant at the maximum width of the first convex marks 60. The second portion 61 b is disposed closer to the −Z side than the first portion 61 a. The second portion 61b changes so that the width in the Y-axis direction gradually decreases from the width of the first portion 61a in the −Z direction. The straight portion 62 extends in the Z-axis direction with a constant width in the Y-axis direction orthogonal to the air flow direction. The width of the straight portion 62 is smaller than the width of the first portion 61a. The first convex mark 60 is an arrow pointing to a first direction toward the −Z side. That is, in the first convex mark 60, in the Y-axis direction, the distance between the most end portion on one side and the most end portion on the other side changes in the Z-axis direction.

  In the present embodiment, in the Y-axis direction, a distance between a portion where the first convex mark 60 is positioned at the end on the + Y side and a portion where the first convex mark 60 is positioned at the end on the −Y side. Is referred to as an arrowhead when it has a shape in which the distance between a portion located on the most + Y side in the Z-axis direction and a portion located on the most -Y side changes. Specifically, when the shape has a shape in which the width in the Y-axis direction changes in the airflow direction including the position at which the first convex mark 60 has the maximum width, it is called an arrowhead. In addition, the arrowhead portion includes both a shape whose tip is sharp and the minimum width in the Y-axis direction is zero, and a non-zero shape as shown in FIG.

  In the present embodiment, in the direction orthogonal to the air flow direction, a portion where the first convex mark 60 is located at the end on one side and a portion where the first convex mark 60 is located at the end on the other side A parting line PL1 is provided which passes through the position at which the distance of. Specifically, in the present embodiment, the parting line PL1 is provided at a position where the width of the first convex mark 60 is maximum in the Y-axis direction. More specifically, in the present embodiment, the parting line PL1 is provided at the position of the boundary between the arrowhead portion 61 and the linear portion 62.

  The parting line is provided at a position where the first mold and the second mold abut against each other when the housing 50 is molded using a mold including the first mold and the second mold. When the mold is opened and closed in the horizontal direction, one of the first mold and the second mold is a fixed mold, and the other of the first mold and the second mold is a movable mold. When the mold is opened and closed vertically, one of the first mold and the second mold is the upper mold, and the other of the first mold and the second mold is the lower mold.

  FIG. 3 shows an example of a parting line provided in the housing 50 in a direction orthogonal to the air flow direction. FIG. 3 shows an example of molding the housing 50 between the first mold MD1 disposed on the + Z side and the second mold MD2 disposed on the -Z side. A parting line PL is provided on the side surface of the base plate 51 in the housing 50. In the housing 50, a parting line PL2 is provided on the side surface of the support portion 40 and the extension portion 52.

  As shown by a two-dot chain line in FIG. 2, the convex portion 81 is provided in the second mold MD2 with a width larger than the width of the groove 42 in the Y-axis direction. The first mold MD1 is provided with a recess in which the protrusion 81 fits. The convex portion 81 is provided at a height from the position of the parting line PL2 to the position of the parting line PL1 in the Z-axis direction. Recess 82 is provided at a depth from the position of parting line PL2 to the position of parting line PL1 in the Z-axis direction. Of the first convex marks 60, the arrowhead portion 61 is molded by the convex portion 81 of the first mold MD1. Of the first convex marks 60, the straight portion 62 is molded by the second mold MD2.

  In order to mold the housing 50 having the above configuration, first, with the first mold MD1 and the second mold MD2 closed, the space provided between the first mold MD1 and the second mold MD2 To the molten resin or metal. Next, the first mold MD1 and the second mold MD2 are cooled to solidify the filled resin or metal. Next, in order to take out the solidified housing 50 from the mold, one of the first mold MD1 and the second mold MD2 is relatively moved in the direction in which the first mold MD1 and the second mold MD2 are separated in the Z direction. Move it.

  Thereby, for example, the housing 50 is separated from the second mold MD2 while remaining in the first mold MD1. At this time, since the point 61 of the first convex mark 60 molded by the second mold MD2 has the same or smaller width in the Y-axis direction toward the −Z side which is the drawing direction of the mold. Leave the second mold MD2 without hindrance, not undercut.

Next, the housing 50 is separated from the first mold MD1 by, for example, the actuation of an ejector pin. At this time, since the linear portions 62 of the first convex marks 60 molded by the first mold MD1 are the same as the width in the Y-axis direction goes to the + Z side, which is the drawing direction of the mold, Do not disturb and leave the first mold MD1.
Therefore, the housing 50 is removed from the mold without causing any problem in molding.

  As described above, according to the present embodiment, in the direction orthogonal to the airflow direction, the portion where the first convex mark 60 is positioned at the end on one side and the first convex mark 60 on the other side A parting line PL1 is provided which passes through a position at which the distance to the endmost portion of the part is the largest. More specifically, according to the present embodiment, a parting line PL1 is provided which passes a position where the width of the first convex mark 60 is maximum in the Y-axis direction. Therefore, according to the present embodiment, it is possible to provide the housing 50 with the first convex marks 60 indicating the air flow direction without adopting the slide type structure. Therefore, according to the present embodiment, it is possible to suppress an increase in cost relating to the manufacture of the housing 50 provided with the first convex mark 60 indicating the air flow direction and the fan device 10 provided with the housing 50. Therefore, in the present embodiment, the first convex mark 60 indicating the air flow direction is provided to the axial fan in which the mold removal direction is the air flow direction, with an increase in manufacturing cost suppressed. it can.

  Further, according to the present embodiment, the first convex mark 60 is located at the bottom 43 of the groove 42. Therefore, according to the present embodiment, the amount by which the first convex mark 60 protrudes from the side surface 41 can be suppressed. Therefore, according to the present embodiment, it is possible to suppress an increase in size of the support portion 40, the housing 50 including the support portion 40, and the fan device 10 including the housing 50.

  Although the preferred embodiments according to the present invention have been described above with reference to the accompanying drawings, it goes without saying that the present invention is not limited to such examples. The shapes, combinations, and the like of the constituent members shown in the above-described example are merely examples, and various changes can be made based on design requirements and the like without departing from the spirit of the present invention.

For example, in the above embodiment, the first convex mark 60 is illustrated as the mark indicating the air flow direction, but for example, as shown in FIG. 4, a pair of sides in which the width in the Y axis direction changes is both Z The first convex mark 65 may be an arrow including an arrowhead 66 inclined with respect to the axis and a linear portion 67 extending from the arrowhead 68 to the −Z side of the arrowhead 66. The first convex mark 65 shown in FIG. 4 includes an arrow point 66 whose width gradually narrows in the air flow direction. Also in the case where the first convex mark 65 is provided, the parting line PL1 is provided at a position passing through the arrowhead 68 having the largest width in the Y-axis direction.
The air flow direction in FIG. 4 is a direction toward the + Z side, that is, a direction from the lower side to the upper side in the drawing.

  Further, in the above embodiment, the configuration to which the present invention is applied to the first convex mark 60 indicating the air flow direction is exemplified, but the present invention is not limited to this configuration. For example, as shown in FIG. 4, also for the second convex mark 70 indicating the rotation direction of the impeller 31 pointing to a second direction orthogonal to the first direction indicated by the first convex mark 65. The present invention is applicable. The second convex mark 70 includes an arrowhead portion 71 whose width gradually narrows toward the −Y side, and a linear portion 72 connected to the arrowhead 73 of the arrowhead portion 71 and extending in the Y-axis direction. The parting line PL1 passes through the tip of the second convex mark 70 in the second direction. Thereby, the parting line PL1 passes the position where the width of the second convex mark 70 is the largest in the Y-axis direction. Therefore, when the housing 50 is molded, the undercut of the second convex mark 70 can be avoided. Therefore, even in the case where the second convex mark 70 indicating the rotation direction is provided, it is not necessary to adopt a slide type structure. Thereby, according to the present embodiment, it is possible to suppress an increase in cost relating to the manufacture of the fan device 10 including the housing 50 including the second convex mark 70 indicating the rotation direction and the housing 50.

  In the case of providing both the mark indicating the air flow direction and the mark indicating the rotational direction, for example, as shown in FIG. 4, in the case of providing the first convex mark 65 and the second convex mark 70, the first convex It is preferable that the parting line PL1 provided on the mark 65 and the parting line PL1 provided on the second convex mark 70 coincide in position in the Z direction, which is the air flow direction. As shown in FIG. 2, the parting line PL1 provided on the first convex mark is, for example, different from the other parting line PL2 in the position in the Z-axis direction. It is necessary to change the position where the second mold MD2 abuts.

  Therefore, when the parting line PL1 provided to the first convex mark 65 and the parting line PL1 provided to the second convex mark 70 are at different positions in the Z direction, the first mold MD1 is formed. The position where the second mold MD2 abuts is changed for each parting line PL1. Therefore, when the parting line PL1 provided in the first convex mark 65 and the parting line PL1 provided in the second convex mark 70 coincide in position in the Z direction, the first mold MD1 And the change of the position where the second mold MD2 abuts can be suppressed to one time.

  Further, as the mark indicating the air flow direction, for example, as shown in FIG. 5, a first convex mark 69 provided with an arrowhead portion 69A and a straight portion 69B adjacent to each other in the Z-axis direction, in addition to the aforementioned arrow. Can also be provided. In the first convex mark 69, the width of the linear portion 69B is the same as the maximum width in the Y-axis direction of the point 69A. In the first convex mark 69, the parting line PL1 passes through the boundary between the arrowhead portion 69A and the straight portion 69B where the width in the Y-axis direction is maximum. Further, as the mark indicating the air flow direction, for example, as shown in FIG. 6, a first convex mark 75 provided with an arrowhead portion 76 and a linear portion 77 adjacent in the Z-axis direction can be provided. The arrow tip 76 gradually narrows in width toward the + Z side. The straight portion 77 has the same width as the maximum width of the arrow tip 76 in the Y-axis direction. At the end on the −Z side of the linear portion 77, a concave portion 78 having a shape in which the width is gradually narrowed toward the + Z side is provided. In the first convex mark 75, the parting line PL1 has the largest width in the Y-axis direction, and the largest width in the Y-axis direction of the boundary between the tip 76 and the linear part 77 or the linear part 77. Go through the range.

  The mark indicating the air flow direction may be a first convex mark provided with line marks of substantially the same width. For example, FIG. 7 shows a first convex mark 90 provided with line marks L1, L2, L3. The line mark L1 and the line mark L2 are disposed at an angle at which one end on the + Z side overlaps and the other end on the -Z side inclines in the direction in which the distance gradually increases as it goes to the -Z side. The line mark L3 extends in the Z-axis direction, and the end on the + Z side overlaps the line marks L1 and L2. In the first convex mark 90, the distance between the portion located most on the + Y side in the Y-axis direction and the portion located most on the -Y side changes in the Z-axis direction. In the first convex mark 90, the parting line PL11 extending in the Y-axis direction is at a position where the distance between the part located on the + Y side most in the Y-axis direction and the part located on the -Y side the most. pass. Further, in the first convex mark 90, a parting line PL12 overlapping with one edge of the line mark L1 and extending in a direction intersecting the Z-axis direction and inclined at the same angle as the inclination angle of the line mark L1 passes Do. Further, in the first convex mark 90, the parting line PL13 which passes over the one edge of the line mark L2 and extends in the direction intersecting the Z-axis direction and which is inclined at the same angle as the inclination angle of the line mark L2 passes . That is, in the first convex mark 90, the parting line PL11 extending in the Y-axis direction and the parting line PL1 including PL12 and PL13 extending in the direction intersecting the Z-axis direction pass.

  Further, the mark indicating the air flow direction may be a first convex mark provided with a plurality of line marks separated from each other and having substantially the same width. For example, FIG. 8 shows a first convex mark 91 provided with line marks L11, L12 and L13. The line marks L11, L12 and L13 are arranged apart from one another. Line mark L13 extends in the Z-axis direction. The line mark L11 is disposed on the -Y side of the line mark 13. One end of the line mark L11 on the + Z side is disposed with a gap from the line mark 13. One edge of the line mark L11 passes through the point where the extension line intersects the side on the + Z side and the side on the -Y side of the line mark L13. The line mark L12 is disposed on the + Y side of the line mark 13. One end of the line mark L12 on the + Z side is disposed with a gap from the line mark 13. One edge of the line mark L12 passes through the point where the extension line intersects the + Z side of the line mark L13 and the + Y side.

  In the first convex mark 91, the parting line PL21 extending in the Y-axis direction is at a position where the distance between the portion located on the + Y side most in the Y-axis direction and the portion located on the -Y side the most. pass. Further, in the first convex mark 91, a parting line PL22 which overlaps with one edge of the line mark L11 and extends in a direction intersecting the Z-axis direction and which is inclined at the same angle as the inclination angle of the line mark L11 passes Do. Further, in the first convex mark 91, a parting line PL23 which is overlapped with one edge of the line mark L12 and extends in a direction intersecting the Z-axis direction and which is inclined at the same angle as the inclination angle of the line mark L12 passes . Further, in the first convex mark 91, a parting line PL24 extending in the Y-axis direction is passed, overlapping with the edge on the + Z side of the line mark L13. That is, in the first convex mark 91, parting lines PL21 and PL24 extending in the Y-axis direction, and a parting line PL1 including PL22 and PL23 extending in the direction intersecting the Z-axis direction pass.

  In the first convex mark 91, for the line marks L11, L12, and L13, the part located most on the + Y side in the Y-axis direction and the part located most on the -Y side are parting lines PL1 passes.

  In the above embodiment, the configuration in which the first convex mark 60 is provided on the side surface 41 of the support portion 40 is exemplified. However, as the position where the first convex mark 60 is provided, the Z axis in the housing 50 There are parallel planes. For example, as shown in FIG. 3, the side parallel to the Z axis of the housing 50 is a side face 51 c facing outward in the radial direction of the base plate 51, a side face 54 a facing outward in the radial direction of the frame 54, and a radial direction of the frame 54. The side surface 54b which faces inward, the side surface 55a which faces the radial direction outer side of the cylinder part 55, and the side surface 55b which faces the radial direction inner side of the cylinder part 55 are mentioned.

  DESCRIPTION OF SYMBOLS 10 ... Fan apparatus, 20 ... Motor, 21 ... Rotation shaft, 30 ... Blade, 40 ... Support part, 41 ... Side, 42 ... Recess, 43 ... Bottom face, 50 ... Housing, 54 ... Frame part, 60, 65, 69, 75, 90, 91: first convex mark 70: second convex mark

Claims (9)

A motor with an axially extending rotary shaft,
A blade fixed to the rotating shaft;
A housing molded of resin or metal and provided with a support for supporting the motor;
A fan device equipped with
A first convex mark provided integrally with the housing and indicating an airflow direction when the motor rotates;
A parting line provided in the housing and extending in a direction intersecting the air flow direction;
In the first convex mark, in the direction perpendicular to the air flow direction, a distance between a portion located at the end on one side and a portion located at the end on the other side changes in the air flow direction,
The fan device according to claim 1, wherein the parting line passes through a position where the distance of the first convex mark is maximum. The housing further includes a frame portion disposed around the blade, and an extension portion extending inward from the frame portion,
The extending portion supports the support portion,
The support portion has a side surface facing the radially outer side,
The fan apparatus according to claim 1, wherein the first convex mark is located on the side surface of the support portion. A plurality of the extending portions are provided,
The first convex mark is located between the plurality of extending portions in the circumferential direction.
The fan device according to claim 2. The housing comprises a frame disposed around the vanes,
The frame portion has a side surface facing the radially outer side, and a side surface facing the radial direction inner side,
The first convex mark is located on the side facing the radially outer side or the side facing the radially inner side,
The fan device according to claim 1. The side surface comprises an axially extending groove,
The fan device according to any one of claims 2 to 4, wherein the first convex mark is located inside the groove. The fan device according to any one of claims 1 to 5, wherein the first convex mark includes an arrow head portion whose width gradually narrows toward the axial end of the first convex mark. . The fan apparatus according to claim 6, wherein the first convex mark is an arrow. The housing is provided with a second convex mark,
The second convex mark is a rotation direction mark pointing to a second direction orthogonal to a first direction indicated by the first convex mark,
The fan device according to any one of claims 1 to 7, wherein the parting line passes a tip portion of the second convex mark in the second direction. The axial position of the parting line provided in the first convex mark and the parting line provided in the second convex mark coincide with each other in the axial direction. Fan device.

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