JP2016058553A - Fitting structure for cooling fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for a cooling fan by which generation of vibrations when a cooling fan is rotated is suppressed and the cooling fan is easily attached and detached, the cooling fan including rotary blades, a casing and rectangular flanges and fitting holes penetrating in a longitudinal direction being bored in both the flanges.SOLUTION: In a support 1, a pair of rail plate parts 13 which face each other in a lateral direction while interposing a through-hole therebetween and are long in a longitudinal direction, are erected. Between both the rail plate parts, a flange 23 is inserted from up to down in a freely slidable manner. Both the rail plate parts include pressing plate parts 14 which press the flange closer to a support plate while covering a front edge of the flange. In the support plate, a stopper plate 15 to which a bottom face of the flange inserted between both the rail plate parts is abutted is erected. In the pressing plate part, an engaging projection is provided by offset downward to a fitting hole of a front-side flange in the state where the bottom faces of both the flanges are abutted to the stopper plate part. The engaging projection is engaged into the fitting hole by deforming at least one of the stopper plate part and the pressing plate part from the abutted state.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooling fan mounting structure for mounting a cooling fan at a predetermined position facing a through hole of a support plate having a through hole.

  For example, a housing for storing a circuit board on which an electronic component that generates heat when energized is mounted has a through hole in its wall surface, and a cooling fan is attached to face the through hole. When energized, the cooling fan is rotated to take outside air into the housing, and the electronic components that generate heat are forcibly cooled. Here, as the cooling fan, a so-called motor fan (for example, see Patent Document 1), which is a commercially available product, is often used, and such a cooling fan generally contains a rotating blade that rotates about an axis and a rotating blade. And a flange having a rectangular shape provided respectively in the longitudinal direction of the casing, and mounting holes penetrating in the longitudinal direction are normally provided in both flanges. Then, the cooling fan is screwed to the housing through the mounting hole. When screwing in this way, there is a problem that it takes a lot of time to attach and detach the cooling fan to the housing.

  As a solution to such a problem, a chassis in which a cooling fan is inserted and accommodated is provided. Two directions in the same plane perpendicular to the insertion direction of the chassis are defined as a left-right direction and a vertical direction. Patent Document 2 discloses that a fixed contact terminal that is paired with the contact terminal is provided and a holding metal fitting that presses the cooling fan toward the fixed contact terminal is provided on the left side surface of the chassis so as to face the fixed contact terminal. Are known. However, in this conventional example, the cooling fan is constrained only in the left-right direction. Therefore, when the rotary blade is rotated, the cooling fan itself (the casing including the flange) rattles and vibrates. In this case, if the rotating blades are rotated at a high speed to increase the air volume (for example, 6000 rpm), there is a problem that the cooling fan is detached from the presser fitting or the life is shortened early due to the vibration.

JP 2002-247798 A JP-A-9-266650

  In view of the above, it is an object of the present invention to provide a cooling fan mounting structure in which generation of vibration is suppressed during rotation of the cooling fan and the cooling fan can be easily attached and detached.

  In order to solve the above-described problem, in the first aspect of the present invention related to the mounting structure of the cooling fan in which the cooling fan is mounted at a predetermined position facing the through hole of the support plate in which the through hole is opened, the cooling fan is A rotating blade, a casing that accommodates the rotating blade, and square flanges provided respectively in the longitudinal direction of the casing, and mounting holes that penetrate in the longitudinal direction are opened in both flanges. The two orthogonal directions along the plate surface of the support plate are the left-right direction and the up-down direction, and a pair of rail plates that are long in the up-down direction facing the left-right direction across the through hole are erected on the support. The flanges of the casing are slidably inserted from the upper part to the lower part between the plate parts, and the rail plate parts cover the front edge of the front flange and press the flanges to the support plate side. The board is provided In addition, a stopper plate is erected on the support plate so that the lower surfaces of both flanges of the casing inserted between the rail plate portions are in contact with each other, and the lower surface of both flanges are in contact with the stopper plate portion on the holding plate portion. In this state, an engagement protrusion is provided by being offset downward with respect to the mounting hole of the front flange, and at least one of the stopper plate part and the holding plate part is deformed from this contacted state, and the engagement protrusion becomes the attachment hole. It is characterized by being configured to engage.

  According to the present invention, between both rail plate portions provided on the support plate, both flanges are inserted while sliding downward from above, and the lower surfaces of both flanges are brought into contact with the stopper plate portion. For example, the stopper plate portion is deformed so as to bend downward by further pressing down both flanges. Thereby, the cooling fan is mounted by the engagement protrusion engaging with the mounting hole of the front flange. In this case, the cooling fan is firmly restrained in the left-right direction by the pair of rail plate portions, in the front-rear direction by the holding plate portion, and in the vertical direction by the engagement protrusion and the stopper plate portion. As described above, in the present invention, since the cooling fan is attached to the support plate simply by inserting the cooling fan between both rail plate portions, the cooling fan can be easily attached and detached, and the cooling fan is attached to the support plate. In this state, the cooling fan is restrained in the left-right direction, the front-rear direction, and the up-down direction, so that even if the rotating blades are rotated at high speed, the cooling fan itself does not rattle, and the cooling fan has an early life span. Can be prevented.

  Further, in order to solve the above-described problem, in the second aspect of the present invention related to the cooling fan mounting structure in which the cooling fan is mounted at a predetermined position facing the through hole of the support plate in which the through hole is opened, the cooling fan includes: A rotating blade that rotates around an axis, a casing that houses the rotating blade, and a square flange that is provided respectively in the front and rear of the casing in the axial direction. The two orthogonal directions along the plate surface of the support plate are the left and right directions and the up and down direction, and a pair of rail plates that are long in the up and down direction facing the left and right direction across the through hole are erected on the support. The two flanges of the casing are slidably inserted from the upper side to the lower side between the rail plate parts, and the front edge part of the front flange is covered on both rail plate parts and both flanges are pressed to the support plate side. Presser plate to perform In addition, the holding plate is provided with engaging projections that engage with the mounting holes of the front flange, and the lower portions of the flanges are in the state where each engaging projection is engaged with the mounting holes of the front flange. The rail plate portion is configured to protrude downward from the lower end of the rail plate portion.

  According to the present invention, when the two flanges are inserted between the rail plate portions provided on the support plate while sliding downward from above, the respective engaging projections engage with the mounting holes of the front flange. The cooling fans are locked by the engaging protrusions provided on the holding plate portions, and the lower portions of both flanges protrude downward from the lower ends of both rail plate portions. For example, when the support plate to which the cooling fan is attached as described above is installed on a shelf plate of a rack that stores a plurality of power supplies, the cooling fan is pushed upward. As a result, the cooling fan is firmly restrained in the left-right direction by the pair of rail plate portions, in the front-rear direction by the holding plate portion, and in the up-down direction by the engagement protrusion and the shelf plate. Thus, even if the rotary blades are rotated, the cooling fan itself does not rattle, and it is possible to prevent the occurrence of a problem that the cooling fan has an early life. In addition, if a play is provided between the engagement protrusion and the mounting hole, the cooling fan can be easily attached and detached.

  In each said invention, it is preferable that the part of the pressing plate part in which the said engagement protrusion is formed is formed in the shape of a tongue piece. According to this, when engaging the engagement protrusion with the attachment hole of the front flange, or when removing the engagement protrusion from the attachment hole of the front flange, only the portion of the holding plate portion is elastically deformed in the front-rear direction. In the state where the engagement protrusion is engaged with the mounting hole of the front flange, the cooling fan is pressed toward the support plate by the holding plate portion. It may be possible to reliably restrain the cooling fan in the front-rear direction.

The perspective view which shows the attachment structure of the cooling fan of 1st Embodiment in the state which removed the cooling fan. The perspective view which shows the attachment structure of the cooling fan of 1st Embodiment in the state which attached the cooling fan. (A) is a front view which shows the state which inserted the cooling fan in the rail member. (B) is sectional drawing which follows IIIb-IIIb in Fig.3 (a). (A) is a front view explaining the state which the engagement protrusion engaged with the attachment hole. (B) is sectional drawing which follows IVb-IVb in Fig.4 (a). (A) And (b) is a front view shown before and after installing the attachment structure of the cooling fan of 2nd Embodiment in a shelf board.

  Hereinafter, referring to the drawings, the support plate is one wall surface of a housing for storing a circuit board or the like on which an electronic component that generates heat when energized is mounted, and a cooling fan is attached to the support plate. A first embodiment of a cooling fan mounting structure will be described.

  Referring to FIGS. 1 and 2, the cooling fan CF mounted on the support plate 1 that is the wall surface of the housing F is a commercially available so-called motor fan whose size and specifications are determined, and rotates around the axis. The rotary blade 21, the casing 22 that accommodates the rotary blade 21, the axial direction of the casing 22 in the front-rear direction, and rectangular flanges 23 a and 23 b provided in front and rear of the axial direction, respectively. At the four corners, mounting holes 24a and 24b penetrating in the front-rear direction are formed. Since the cooling fan CF itself is known, detailed description thereof is omitted here. In the following, the two orthogonal directions along the plate surface 11 of the support plate 1 are the left-right direction and the up-down direction, and terms indicating directions with reference to FIG. 1 are used.

  As shown in FIG. 1, the support plate 1 is formed with a through hole 12 through which the rotary blade 21 faces. On the front surface side of the support plate 1, a pair of rail plate portions 13 a and 13 b that are long in the up-down direction facing the left-right direction across the through hole 12 are erected. In this case, the lengths of the rail plate portions 13a and 13b are substantially matched with the vertical lengths of the flanges 23a and 23b. And between these rail plate parts 13a and 13b, the front flange 23a located on the suction side when the rotary blade 21 rotates is forward, and both the flanges 23a and 23b are slidably inserted downward from above. It has become. The rail plate portions 13a and 13b are respectively provided with presser plate portions 14 and 14 that cover the front edge portion of the front flange 23a and press the flanges 23a and 23b toward the support plate 1 side.

  On the upper and lower ends of the holding plate portions 14 and 14, portions 14a extending in the form of tongues toward the inside of the support plate 11 are formed, and engaging projections 15 protruding rearward are formed on each portion 14a. ing. In this case, the engagement protrusion 15 is integrally formed by extrusion from the front side to the rear side of the portion 14a. Further, as shown in FIGS. 3 (a) and 3 (b), each engagement protrusion 15 is attached to each front flange 23a in a state where the lower surfaces of both flanges 23a and 23b are in contact with a stopper plate portion 16 described later. It is formed so as to be offset downward with respect to the hole 24a. Further, the support plate 1 is provided with a stopper plate portion 16 that is elongated in the left-right direction in which the lower surfaces of both flanges 23a and 23b of the cooling fan CF inserted between the rail plate portions 13a and 13b abut each other. . In this case, the width in the front-rear direction of the stopper plate portion 16 is substantially matched with the width between the flanges 23a and 23b. Hereinafter, the mounting of the cooling fan CF to the support plate 1 will be described with reference to FIGS.

  First, the front flange 23a is inserted between the rail plate portions 13a and 13b, and the flanges 23a and 23b of the cooling fan CF are inserted while sliding downward from above. As shown in FIGS. 3A and 3B, when the lower surfaces of both flanges 23a and 23b abut against the stopper plate portion 16, the flanges 23a and 23b of the cooling fan CF are moved so that the stopper plate portion 16 bends downward. Press down further. As a result, as shown in FIGS. 4A and 4B, the engaging protrusions 15 engage with the mounting holes 24a of the front flange 23a, respectively, and the mounting of the cooling fan CF is completed. When removing the cooling fan CF from the support plate 1, if the holding plate portion 14 is elastically deformed forward, the engagement of each engagement protrusion 15 from each mounting hole 24 a is released, and the stopper plate portion 16. As a result, the cooling fan CF is pushed upward. The cooling fan CF can be removed by pulling it out while sliding the flanges 23a, 23b of the cooling fan CF upward.

  According to the above-described embodiment, the cooling fan CF has the pair of rail plate portions 13a and 13b in the left-right direction, the holding plate portions 14 and 14 by the portion 14a in the front-rear direction, and the engagement protrusion. 15 and the stopper plate portion 16 are respectively restrained in the vertical direction. For this reason, even if the rotary blade 21 is rotated at a high speed, the cooling fan itself does not rattle, and it is possible to prevent a problem that the cooling fan CF has an early life span. Moreover, since the cooling fan CF is attached to the support plate 1 simply by inserting the cooling fan CF between the rail plate portions 13a and 13b as described above, the cooling fan CF can be easily attached and detached.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to said thing. In the above embodiment, the engagement protrusion 15 is further lowered by further pressing down the flanges 23a and 23b of the cooling fan CF so that the stopper plate 16 is bent downward from the state in which the lower surfaces of the flanges 23a and 23b are in contact with the stopper plate 16. Has been described by way of example as engaging with the mounting holes 24a of the front flange 23a. For example, when the wall surface of the housing F is also used as the stopper plate 16 and cannot be easily deformed. The offset amounts of the front flanges 23a of the engagement projections 15 with respect to the mounting holes 24a are appropriately designed so that the presser plate portions 14 and 14 can be moved from the state in which the lower surfaces of the flanges 23a and 23b are in contact with the stopper plate portion 16. The tongue-like portions 14a provided at the upper and lower ends may be deformed so that the engaging protrusions 15 engage with the mounting holes 24a of the front flange 23a.

  In addition, although the example in which the portion 14a of the presser plate portion 14 where the engagement protrusion 15 is formed is formed in a tongue-like shape has been described, the presser plate portion 14 can be configured by a plate material that is long in the vertical direction, Further, the engagement protrusion 15 can be provided separately at a predetermined position of the presser plate portion 14. Further, the stopper plate portion 16 has been described as an example of a single plate-like member. However, the stopper plate portion 16 is not limited to this as long as the cooling fan CF can be restrained in the vertical direction together with the engaging protrusion 15. For example, a plurality of plate members may be arranged at predetermined intervals.

  Next, referring to FIGS. 5A and 5B, as in the first embodiment, the support plate 10 is a part of a housing that stores a circuit board on which electronic components that generate heat when energized are mounted. A second embodiment of the cooling fan mounting structure of the present invention will be described by taking as an example a case where the cooling fan CF is mounted on the support plate on the wall surface. In the following, the same reference numerals are used for the same members and elements, and the terminology indicating the direction is based on FIG. 1 as in the first embodiment.

  On the front side of the support plate 10, a pair of rail plate portions 130 a and 130 b that are long in the up-down direction and are opposed to each other in the left-right direction with a through hole interposed therebetween. The rail plate portions 130 a and 130 b are positioned so as to substantially coincide with the length of the flange 23 a in the vertical direction and the lower end thereof is flush with the lower end of the support plate 10. Then, both flanges 23a and 23b are slidably inserted from above to below between the rail plate portions 130a and 130b. Further, as in the first embodiment, the rail plate portions 130a, 130b cover the front edge portion of the front flange 23a and press the flange plates 23a, 23b toward the support plate 10 side. Are respectively formed on the upper and lower ends of the presser plate portions 14 and 14, and portions 14 a extending in the shape of tongues toward the inside of the support plate 10 are formed. Each portion 14a is formed with an engaging protrusion 15 protruding rearward.

  Each engagement protrusion 15 is positioned so that the lower portion of the flange 23a protrudes downward from the lower ends of the rail plate portions 130a and 130b in a state of being engaged with the mounting holes 24a of the front flange 23a (see FIG. 5 (a)). In this case, a play is provided between the engagement protrusion 15 and the attachment hole 24a, and when the engagement protrusion 15 is engaged with the attachment hole 24a, the lower portion of the flange 23a extends from the lower ends of the rail plate portions 130a and 130b. It is locked in a state of protruding downward. Then, when the casing F is installed on a shelf plate SP provided in a rack not shown, both flanges 23a and 23b of the cooling fan CF are pushed up (see FIG. 5B). Thus, the cooling fan CF is moved in the left-right direction by the pair of rail plate portions 130a, 130b, in the front-rear direction by the holding plate portions 14, 14, and by the engagement protrusion 15 and the shelf plate SP. The cooling fan CF itself is not rattled even when the rotating blades are rotated at a high speed, and it is possible to prevent the problem that the cooling fan CF has an early life span. CF can be easily attached and detached.

CF: cooling fan, 1, 10: support plate (wall of housing), 12: through hole, 13a, 13b, 130a, 130b ... rail plate portion, 14 ... presser plate portion, 14a ... part of presser plate portion (tongue 15 ... engagement projection, 16 ... stopper plate portion, 22 ... casing, 23a, 23b ... flange, 24a, 24b ... mounting holes.

Claims (3)

A cooling fan mounting structure for attaching a cooling fan to a predetermined position facing the through hole of the support plate in which the through hole is opened,
The cooling fan has rotating blades that rotate around the axis, a casing that houses the rotating blades, and rectangular flanges that are respectively provided in the front and rear of the casing in the axial direction. In what has been
The two orthogonal directions along the plate surface of the support plate are the left-right direction and the up-down direction, and a pair of rail plates that are long in the up-down direction facing the left-right direction across the through hole are erected on the support. Between the plate parts, both flanges of the casing are slidably inserted from above to below,
Both rail plate portions are provided with presser plate portions that cover the front edge portions of the front flanges and press both flanges toward the support plate side, and both flanges of the casing inserted between the rail plate portions on the support plate. Stopper plates that stand against each other are
The presser plate is provided with an engagement protrusion that is offset downward with respect to the mounting hole of the front flange in a state where the lower surfaces of both flanges are in contact with the stopper plate. From this contacted state, the stopper plate and A mounting structure for a cooling fan, wherein at least one of the holding plate portions is deformed so that the engaging projections engage with the mounting holes. A cooling fan mounting structure for attaching a cooling fan to a predetermined position facing the through hole of the support plate in which the through hole is opened,
The cooling fan has rotating blades that rotate around the axis, a casing that houses the rotating blades, and rectangular flanges that are respectively provided in the front and rear of the casing in the axial direction. In what has been
The two orthogonal directions along the plate surface of the support plate are the left-right direction and the up-down direction, and a pair of rail plates that are long in the up-down direction facing the left-right direction across the through hole are erected on the support. Between the plate parts, both flanges of the casing are slidably inserted from above to below,
Both rail plate portions are provided with presser plate portions that cover the front edge portions of the front flanges and press both flanges toward the support plate side, and the presser plate portions are engaged with the mounting holes of the front flanges, respectively. A cooling fan characterized in that a protrusion is provided, and the lower part of the flange protrudes downward from the lower ends of both rail plate parts in a state where each engaging protrusion is engaged with the mounting hole of the front flange. Mounting structure.   The cooling fan mounting structure according to claim 1 or 2, wherein a portion of the pressing plate portion on which the engagement protrusion is formed is formed in a tongue shape.

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