JP2988913B1 - heatsink - Google Patents

Abstract

An object of the present invention is to provide a heat sink provided with a base for mounting an axial fan, which has improved workability in manufacturing. SOLUTION: In the heat sink 1 provided with the pedestal 4, the pedestal 4 is provided with a plate portion 43 constituting a mounting surface 41 of the axial fan, and a plurality of plate-shaped fins 44 arranged at right angles to the plate portion 43 and in parallel. A mounting hole 42 for the axial fan is formed on the surface of the plate portion 43 of the pedestal 4 by a cylindrical insert nut 45.
4 is inserted between the plate fins 2 from the tip end side of the plate fin 2, and the insert nut 45 penetrates the plate portion 43 and bites into the plate fin 2, thereby being fixed to the tip end of the plate fin 2. Features.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat sink in which a radiation fin is a pin fin or a plate fin and has a base for mounting an axial fan.

[0002]

2. Description of the Related Art Conventionally, in order to manufacture a plate fin heat sink having a base for mounting an axial fan, a predetermined portion of a plate fin of a plate fin heat sink obtained by extrusion molding is cut. Then, a pedestal was attached to the portion by welding or the like. However, in this case, there is a problem that workability is poor because the work of cutting the plate fins and the work of joining the pedestals are troublesome.

An object of the present invention is to provide a heat sink having a base for mounting an axial fan, which has improved workability in manufacturing.

[0004]

According to the first aspect of the present invention,
In the heat sink, wherein the radiating fins are pin fins or plate fins and include a pedestal for mounting an axial fan, the pedestal has a plate portion forming a mounting surface of the axial flow fan, and a plurality of fins arranged at right angles to the plate portion. A plate-shaped fin is provided on the surface of the pedestal, and a mounting hole for the axial flow fan is formed on the surface of the pedestal by a cylindrical insert nut. And is inserted between the radiating fins, and is fixed to the tip of the radiating fin by the insert nut penetrating the plate portion and biting into the radiating fin.

According to a second aspect of the present invention, in the heat sink, wherein the radiating fin is a pin fin or a plate fin, and the pedestal is provided with a plate for mounting the axial fan, the pedestal comprises a plate portion forming a mounting surface of the axial fan. A plurality of plate-shaped fins extending at right angles from the plate portion and arranged side by side, and a mounting hole for an axial flow fan is formed on a surface of the plate portion of the pedestal by a cylindrical insert nut. The fins are inserted between the radiating fins from the distal ends of the radiating fins, and are fixed to the distal ends of the radiating fins by clinching the distal ends of the radiating fins between the plate-like fins.

[0006]

(Embodiment 1) FIG. 1 is an overall perspective view of a heat sink according to this embodiment. The heat sink 1 is a plate fin type heat sink, and includes a large number of plate fins 2 as heat radiation fins and a base plate 3 integrated therewith. A large number of plate fins 2 are arranged at equal intervals and at right angles to the base plate 3. In the heat sink 1, pedestals 4 for mounting an axial fan are fixed to four corners of the upper surface 10 of the heat sink 1 formed by the distal end surfaces of the plate fins 2. The axial fan (not shown) is mounted on the heat sink 1 by fixing the four mounting portions (not shown) to the mounting surface 41 of the pedestal 4 and fixing the bolts to the mounting holes 42. Mounted.

FIG. 2 is an exploded perspective view of the mounting structure of the pedestal 4. The pedestal 4 includes a plate portion 43 having an upper surface serving as a mounting surface 41, and a plurality of plate-like fins 4 arranged at right angles to the plate portion 43 and side by side.
It consists of four. Reference numeral 45 denotes a cylindrical insert nut forming the mounting hole 42. Insert nut 45 is
For example, it is made of brass, stainless steel, or the like, and a thread groove is formed on an outer peripheral surface thereof. As the insert nut, a nut having a large number of minute projections formed on the outer peripheral surface may be used. The dimensions of each part are, for example, the thickness T of the plate portion 43 in the pedestal 4 is 2 mm, the length L1 of the plate-like fin 44 is 7 mm, and the length L2 of the plate fin 2 in the heat sink 1 is 45 mm. The fin pitch P is 6 mm.

The heat sink 1 and the pedestal 4 are respectively
By extruding aluminum or its alloy,
To manufacture. The pedestal 4 may be made of resin by injection molding or a casting. The work of attaching the pedestal 4 to the heat sink 1 is performed as follows. That is, the plate-like fins 44 of the pedestal 4 are inserted between the plate fins 2 from the tip end side of the plate fins 2, and at predetermined positions of the mounting surface 41 of the pedestal 4, that is, at positions where the mounting holes 42 of the axial fan are formed. A hole penetrating the plate portion 43 and reaching the plate-like fin 44 and the plate fin 2 is formed, and an insert nut 45 is fitted into the hole. The insert nut 45
Is set to be equal to or greater than the sum of the above T and L1.

FIG. 3 is a sectional view taken along the line III-III of FIG. The insert nut 45 is attached to the plate 4
3, the plate-like fins 44 and the two plate fins 2. That is, the pedestal 4 and the plate fin 2 are integrated by the insert nut 45.

In the mounting operation of the pedestal 4, as a processing operation, there are an operation for forming a hole for fitting the insert nut 45 and an operation for fitting the insert nut 45 to the hole. There is no cutting work or joining work such as welding. Therefore, the above-described mounting operation, and eventually, the manufacturing operation of the heat sink 1 having the pedestal 4 are performed with good workability.

Further, in the above mounting structure of the pedestal 4,
Since the pedestal 4 and the plate fin 2 are integrated by the insert nut 45, the pedestal 4 is
Firmly fixed to Also, the insert nut 45 is
Since it functions not only as the fixing means of the pedestal 4 but also as the mounting hole 42, the mounting structure of the pedestal 4 is simplified accordingly.

Further, as shown in FIG. 1, in the heat sink 1 having the above structure, the pedestal 4 protrudes from the upper surface 10 of the heat sink 1 by the thickness T of the plate portion 43. Then, a space having a thickness T is formed between the bottom surface of the axial fan and the upper surface 10 of the heat sink 1. Therefore, the air flowing between the plate fins 2 easily flows into the axial fan, and the heat radiation effect is improved.

(Embodiment 2) As shown in FIG.
Alternatively, the tip of the plate fin 2 at the location to be mounted may be cut by the thickness T, and the pedestal 4 may be mounted there. FIG.
Indicates a state where the pedestal 4 is attached. The mounting surface 41 of the pedestal 4 is flush with the upper surface 10 of the heat sink 1.

In the heat sink 1 having this configuration, since there is no large-scale cutting work or welding work such as welding of the plate fins 2, the manufacturing work of the heat sink 1 having the pedestal 4 is performed with good workability. Further, similarly to the first embodiment, the pedestal 4 is firmly fixed to the heat sink 1.
The configuration of the pedestal 4 is simplified.

(Embodiment 3) Base 4 in Embodiment 1
The above mounting work and mounting structure can also be applied to a pin fin type heat sink. That is, as in the first embodiment, FIG.
As shown in FIG. 6, the pedestal 4 may be attached to the pin fin type heat sink 1a.

According to this, the same operation and effect as in the first embodiment can be obtained. In addition, in the mounting structure of the pedestal 4, the insert nut 45 bites into two or four pin fins 21.

(Embodiment 4) FIG. 7 is a perspective partial view of a heat sink of this embodiment. In this embodiment, a pedestal 5 different from the pedestal 4 of the first embodiment is attached to the plate fin type heat sink 1.

FIG. 8 is an exploded perspective view of the mounting structure of the pedestal 5. The pedestal 5 includes a plate portion 53 having an upper surface serving as a mounting surface 51, and a plurality of plate-like fins 5 arranged at right angles to the plate portion 53 and side by side.
It consists of four. Reference numeral 55 denotes a cylindrical insert nut constituting the mounting hole 52. A curved concave portion 56 is formed in the plate portion 53 from the portion between the plate-like fins 54 to the base of the plate-like fin 54. The insert nut 55 is made of, for example, brass, stainless steel, or the like, and has a thread groove formed on an outer peripheral surface thereof. As the insert nut, a nut having a large number of minute projections formed on the outer peripheral surface may be used. The dimensions of each part are, for example, the thickness T1 of the plate portion 53 in the pedestal 5 is 2 mm, the length L3 of the plate-like fin 54 is 7 mm, and the length L4 of the plate fin 2 in the heat sink 1 is 45 mm. The fin pitch P1 is 6 mm.

The pedestal 5 is manufactured by extruding aluminum or its alloy. The pedestal 5 may be made of resin by injection molding or a casting. The work of attaching the pedestal 5 to the heat sink 1 is performed as follows. That is, first, a cut 22 having a predetermined depth is formed at the boundary of the portion of the plate fin 2 to which the base 5 is attached.
(FIG. 8) is formed. Next, the plate-like fin 54 of the pedestal 5 is inserted between the plate fins 2 from the tip end side of the plate fin 2, and the tip of the plate fin 2 is brought into contact with the concave portion 56. Then, pressure is further applied downward to the pedestal 5, and the tip of the plate fin 2 is clinched in the concave portion 56. Next, a hole that does not penetrate the plate portion 53 is formed at a predetermined position of the mounting surface 51 of the pedestal 5, that is, a position where the mounting hole 52 of the axial fan is formed, and the insert nut 55 is fitted into the hole. The depth of the cut 22 is the same as the length of the portion of the plate fin 2 to be clinched.

FIG. 9 is a sectional view taken along the line IX-IX of FIG. The pedestal 5 is fixed to the tip of the plate fin 2 by clinching the tip of the plate fin 2 in the recess 56.

In the mounting operation of the pedestal 5, as a processing operation, an operation of forming the notch 22, an operation of forming a hole for fitting the insert nut 55, and an operation of fitting the insert nut 55 into the hole. However, there is no joining work such as cutting work or welding of the plate fin 2.
Therefore, the above-mentioned mounting operation, and eventually the manufacturing operation of the heat sink 1 provided with the pedestal 5, are performed with good workability.

In the above mounting structure of the pedestal 5,
Since the tip of the plate fin 2 is clinched in the concave portion 56, the pedestal 5 is firmly fixed to the heat sink 1. Further, since the tip of the plate fin 2 is used as a fixing means and other fixing means are not used, the mounting structure of the pedestal 5 is simplified.

(Embodiment 5) Pedestal 5 in Embodiment 4
The above mounting work and mounting structure can also be applied to a pin fin type heat sink. That is, similar to the fourth embodiment, FIG.
As shown in FIG. 10, the pedestal 5 may be attached to the pin fin type heat sink 1a.

According to this, the same operation and effect as in the fourth embodiment can be obtained. In addition, in the mounting structure of the pedestal 5,
The tips of the plurality of pin fins 21 are clinched in one recess 56.

[0025]

According to the first aspect of the present invention, since the base and the plate fin are integrated by the insert nut, the base can be firmly fixed to the heat sink.

Further, when the pedestal is mounted on the heat sink, a large-scale cutting work of the plate fins and a joining work such as welding can be omitted, so that the workability of the mounting work can be improved.

According to the second aspect of the present invention, the pedestal is fixed to the heat sink by clinching the tip of the plate fin between the plate-shaped fins of the pedestal.
The pedestal can be firmly fixed to the heat sink.

Further, when the pedestal is mounted on the heat sink, a large-scale cutting work of the plate fins and a joining work such as welding can be omitted, so that the workability of the mounting work can be improved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a heat sink according to a first embodiment.

FIG. 2 is an exploded perspective view of the pedestal mounting structure according to the first embodiment.

FIG. 3 is a sectional view taken along line III-III of FIG.

FIG. 4 is a partial perspective view showing a heat sink according to a second embodiment before a pedestal is attached.

FIG. 5 is a partial perspective view showing a heat sink of a second embodiment with a pedestal attached.

FIG. 6 is an exploded perspective view of a pedestal mounting structure according to a third embodiment.

FIG. 7 is a partial perspective view showing a heat sink according to a third embodiment to which a pedestal is attached.

FIG. 8 is an exploded perspective view of a pedestal mounting structure according to a fourth embodiment.

FIG. 9 is a sectional view taken along line IX-IX of FIG. 7;

FIG. 10 is an exploded perspective view of a base mounting structure according to a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat sink 2 Plate fin 21 Pin fin 4,5 Pedestal 42,52 Mounting hole 43,53 Plate part 44,54 Plate fin 45,55 Insert nut

Claims (2)

(57) [Claims] 1. A heat sink, wherein the radiating fin is a pin fin or a plate fin and includes a pedestal for mounting an axial fan. It consists of a plurality of plate-shaped fins arranged at right angles and side by side. A mounting hole for the axial flow fan is formed on the surface of the plate portion of the pedestal by means of a cylindrical insert nut. A heat sink which is inserted between the radiation fins from the distal end side of the radiation fins and is fixed to the distal end of the radiation fins by an insert nut penetrating through the plate portion and biting into the radiation fins. 2. A heat sink, wherein the radiating fin is a pin fin or a plate fin and has a pedestal for mounting an axial fan, wherein the pedestal is formed at right angles to a plate portion forming a mounting surface of the axial flow fan. The base plate has a plurality of plate-shaped fins extending in parallel, and a mounting hole for an axial flow fan is formed on the surface of the plate portion of the base with a cylindrical insert nut. A heat sink, which is inserted between the radiation fins from the distal end and fixed to the distal end of the radiation fin by clinching the distal end of the radiation fin between the plate-like fins.