CN215935430U

CN215935430U - Integrated radiating fin

Info

Publication number: CN215935430U
Application number: CN202122467742.3U
Authority: CN
Inventors: 邓子军; 李彪; 叶俊; 罗益军
Original assignee: Tamp Technology Guangzhou Co ltd
Current assignee: Tamp Technology Guangzhou Co ltd
Priority date: 2021-10-13
Filing date: 2021-10-13
Publication date: 2022-03-01
Anticipated expiration: 2031-10-13

Abstract

The utility model provides an integrated radiating fin, which relates to the technical field of radiating fins and comprises a radiating fin main body and a fixing piece, wherein one side of the radiating fin main body is provided with a plane, and the other side of the radiating fin main body is provided with a plurality of radiating fins; the radiating fin comprises a radiating fin body and is characterized in that a mounting hole is formed in the radiating fin body, the fixing piece comprises a threaded column and a mounting column connected with the threaded column, knurls are arranged on the mounting column, and the mounting column is installed in the mounting hole in an interference mode. The mounting column of the fixing piece of the integrated radiating fin is connected with the radiating fin main body in an interference manner, so that when the threaded column needs to be disassembled, the mounting column and the radiating fin can be firmly mounted, and the mounting column is provided with the knurls, so that the friction force between the mounting column and the mounting hole of the radiating fin can be increased, and the mounting column is prevented from slipping in the mounting hole when the threaded column is disassembled.

Description

Integrated radiating fin

Technical Field

The utility model relates to the technical field of radiating fins, in particular to an integrated radiating fin.

Background

The conventional heat radiating fin fixing seat is provided with a threaded hole on the surface of a heat radiating fin, and then the threaded hole on the surface of the heat radiating fin is aligned to rotate and fix by utilizing a threaded column on a bronze gong column. Thus, a frame is formed, and the radiating fins assembled with the copper gongs are attached to the surface of the heating source through a layer of insulating heat-conducting glue. And then, the bottom surface of the PCBA board is aligned with the gong holes of the radiating fins by screws with the M3 hole diameters and is rotated and fixed rightwards.

The existing radiating fin fixing structure base is relatively complicated in the whole manufacturing process, and the abnormal phenomenon of screw hole slipping of the radiating fin is relatively easy to occur. Because the upper part and the lower part of the bronze gong column on the surface of the radiating fin are both fixed by screws in a rotating way, the subsequent product maintenance and disassembly are very inconvenient. Because the upper part and the lower part of the bronze gong column are locked by the thread engagement force. When the bronze gong post needs to be detached, two stress points above and below the bronze gong post inevitably have one stress point to be loosened firstly, and the other stress point is loosened later. If the stress point of the first release is at a point above the gong, this will cause the surface of the heat sink to release and the gong to be secured to the surface of the PCBA board. Obviously this is not a design requirement. Meanwhile, because the upper part and the lower part of the bronze gong column are locked by manpower, two screw locking processes are needed, and the production efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an integrated radiating fin to solve the technical problem that the subsequent product of the existing radiating fin is inconvenient to maintain and disassemble.

The utility model provides an integrated radiating fin which comprises a radiating fin main body and a fixing piece, wherein one side of the radiating fin main body is provided with a plane, and the other side of the radiating fin main body is provided with a plurality of radiating fins;

the radiating fin comprises a radiating fin body and is characterized in that a mounting hole is formed in the radiating fin body, the fixing piece comprises a threaded column and a mounting column connected with the threaded column, knurls are arranged on the mounting column, and the mounting column is installed in the mounting hole in an interference mode.

In an alternative embodiment, a plurality of the heat dissipating fins form two fixing areas for fixing the heat dissipating fin body on the heat dissipating fin body;

one fixing area is provided with one mounting hole, the other fixing area is provided with two mounting holes, and the connecting line of the three mounting holes is triangular; and a fixing piece for fixing the radiating fin main body is arranged on the mounting hole.

In an alternative embodiment, a triangle formed by connecting lines of three mounting holes is an acute triangle.

In an alternative embodiment, the mounting hole has an inner diameter of 2.4 mm.

In an alternative embodiment, the knurls have a depth of 1.7 mm.

In an optional embodiment, the fixing piece further comprises a first-order guide post and a second-order guide post, the mounting post, the second-order guide post and the first-order guide post are sequentially connected, and the diameters of the mounting post, the second-order guide post and the first-order guide post are sequentially reduced.

In an alternative embodiment, the diameter of the mounting post is 2.6mm, the diameter of the second order guide post is 2.4mm, and the diameter of the first order guide post is 2.2 mm.

In an alternative embodiment, the screw post is provided with a screw hole, and the mounting hole of the fixing member is inserted from the flat surface side of the heat sink main body.

In an alternative embodiment, the heat sink main body is made of aluminum.

In an alternative embodiment, the heat sink body is a unitary structure with the heat sink body.

The mounting column of the fixing piece of the integrated radiating fin is connected with the radiating fin main body in an interference manner, so that when the threaded column needs to be disassembled, the mounting column and the radiating fin can be firmly mounted, and the mounting column is provided with the knurls, so that the friction force between the mounting column and the mounting hole of the radiating fin can be increased, and the mounting column is prevented from slipping in the mounting hole when the threaded column is disassembled.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an integrated heat sink according to an embodiment of the present invention;

FIG. 2 is a schematic view of another angle of the one-piece heat sink shown in FIG. 1;

FIG. 3 is a schematic view of the fin body of the one-piece fin of FIG. 1;

FIG. 4 is a schematic view of another angled configuration of the fin body of the one-piece fin of FIG. 1;

FIG. 5 is a schematic view of the fastener of the integrated heat sink shown in FIG. 1;

fig. 6 is another angle schematic view of the fastener of the integral heat sink shown in fig. 1.

Icon: 100-a heat sink body; 200-a fixture; 201-threaded post; 202-mounting posts; 203-second order guide post; 204-first order guide post; 205-a threaded hole; 300-radiating fins; 400-a fixation area; 500-mounting holes.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

Referring to fig. 1 to 6, the present invention provides an integrated heat sink, including a heat sink main body 100 and a fixing member 200, wherein one side of the heat sink main body 100 has a plane, and the other side of the heat sink main body 100 is provided with a plurality of heat dissipating fins 300;

the heat radiating fin body 100 is provided with a mounting hole 500, the fixing member 200 comprises a threaded column 201 and a mounting column 202 connected with the threaded column 201, knurling is arranged on the mounting column 202, and the mounting column 202 is arranged in the mounting hole 500 in an interference manner.

In some embodiments, the heat sink body 100 of the one-piece heat sink is connected to the PCBA board by the fastener 200; one end of the mounting post 202 of the fixing member 200 is inserted into the mounting hole 500 from one side of the plane of the heat sink main body 100, and the mounting post 202 is knurled, thereby increasing the frictional force between the mounting post 202 and the mounting hole 500.

The heat sink main body 100 is inserted from one side of the PCBA board far away from the heat sink main body 100 through screws and connected with the threaded columns 201, so that the heat sink main body 100 is firmly and tightly connected with the PCBA board; when the heat sink main body 100 needs to be separated from the PCBA board, the screw needs to be rotated in the reverse direction, that is, the mounting post 202 located in the mounting hole 500 receives a reverse acting force, when the reverse acting force is greater than the friction force between the mounting hole 500 and the mounting post 202, the mounting post 202 rotates in the mounting hole 500, and at this time, the screw cannot rotate relative to the threaded post 201, so that the heat sink main body 100 cannot be separated from the PCBA board.

Knurling is provided on the mounting post 202 to increase the frictional force between the mounting post 202 and the mounting hole 500, so that the mounting post 202 can be fixed to the mounting hole 500, and at this time, the screw can be rotated with respect to the screw post 201 by rotating the screw, so that the screw can be disengaged from the screw post 201, and the heat sink main body 100 and the PCBA board can be separated.

Referring to fig. 3, in an alternative embodiment, a plurality of the heat sink fins 300 form two fixing regions 400 for fixing the heat sink body 100 on the heat sink body 100;

one mounting hole 500 is formed in one fixing area 400, two mounting holes 500 are formed in the other fixing area 400, and the connecting lines of the three mounting holes 500 form a triangle; the mounting hole 500 is provided with a fixing member 200 for fixing the heat sink main body 100.

In order to ensure that the heat sink main body 100 can be reliably and firmly attached to the surface of a power device (MOS tube) on the PCBA board for heat dissipation; the plurality of heat dissipating fins 300 form two fixing regions 400 on the heat dissipating fin body 100, and three mounting holes 500 formed on the fixing regions 400 form a triangle, so that the stress of the heat dissipating fin body 100 is balanced, and a horizontal stress surface is formed, so that the heat dissipating fin body 100 is firmly attached to the surface of the power device.

The heat sink main body 100 is provided with 20 heat dissipating fins 300 for heating a heat dissipating area; in order to avoid the installation hole 500 on the heat sink main body 100, the overall beauty and firmness of the heat sink main body 100 are affected; referring to the location of the opening of the mounting hole 500, the fixing region 400 is added; one of the securing areas 400 has a width of 3.79mm and one of the securing areas 400 has a width of 3 mm; the width of the fixing region 400 is generally not less than 3 mm; in order to make the arrangement of the heat dissipating fins 300 uniform, when the heat sink main body 100 is not sufficiently provided with one heat dissipating fin 300, an extra width is added to the fixing region 400, for example, the width of the fixing region 400 is set to 3.79 mm.

In order to make the heat sink main body 100 have a larger heat dissipation area, two fixing regions 400 are arranged on the heat sink main body 100, two mounting holes 500 are arranged on the fixing region 400 at the side of the discrete heat sink main body 100, the distance between the two mounting holes 500 is 26.82mm, the connecting line of the mounting holes 500 is parallel to the heat dissipation fin 300 on the heat sink main body 100, and thus two mounting holes 500 are arranged by using one fixing region 400, compared with the three mounting holes 500 arranged by using three fixing regions 400, the heat dissipation area of the heat sink main body 100 is enlarged, the stress surface of the heat sink main body 100 keeps balanced stress, the aesthetic property of the heat sink main body 100 is kept, the processing consumables are greatly reduced, and the production efficiency is improved.

The length of the heat sink main body 100 is 55mm, the length width of the heat sink main body 100 and the length of the heat sink fins 300 are 48.3 mm; the height of the heat sink main body 100 plus the heat dissipating fins 300 is 7 mm.

Referring to fig. 4, in an alternative embodiment, a triangle formed by connecting lines of three mounting holes 500 is an acute triangle.

In an alternative embodiment, the mounting hole 500 has an inner diameter of 2.4 mm.

In an alternative embodiment, the knurls have a depth of 1.7 mm.

Referring to fig. 5, in an alternative embodiment, the fixing member 200 further includes a first-order guide pillar 204 and a second-order guide pillar 203, and the mounting pillar 202, the second-order guide pillar 203 and the first-order guide pillar 204 are connected in sequence, and the diameters of the mounting pillar 202, the second-order guide pillar 203 and the first-order guide pillar 204 are reduced in sequence.

In an alternative embodiment, the diameter of the mounting post 202 is 2.6mm, the diameter of the second order guide post 203 is 2.4mm, and the diameter of the first order guide post 204 is 2.2 mm.

Referring to fig. 6, in an alternative embodiment, the screw post 201 is provided with a screw hole 205, and the mounting hole 500 of the fixing member 200 is inserted from the planar side of the heat sink main body 100.

In an alternative embodiment, the material of the heat sink main body 100 is aluminum.

In an alternative embodiment, the heat sink fin 300 is a unitary structure with the heat sink body 100.

The inner diameter of the mounting hole 500 is 2.4mm, the mounting column 202 is arranged on the mounting hole 500 in an interference fit mode, namely the diameter of the mounting column 202 is larger than the inner diameter of the mounting hole 500, and the diameter of the mounting column 202 is generally 2.6 mm; the depth of the knurling provided on the mounting post 202 was 1.7mm, that is, the depth of the knurling in the axial direction of the mounting post 202 was 1.7 mm.

The mounting post 202 is arranged in the mounting hole 500 in an interference fit mode, so that the mounting post 202 and the mounting hole 500 are firmly mounted, and stress damage is caused because the mounting post 202 cannot enter the mounting hole 500 when being pressed and riveted in the process of pressing and riveting the mounting hole 500 and the mounting post 100 is prevented from being impacted, if the mounting hole 500 is too small, the mounting post 202 cannot enter the mounting hole 500, or due to the instant impact force of pressing and riveting, the mounting hole 500 of the mounting post 100 is expanded and cracked.

In order to avoid the above problem, a second-order guide post 203 and a first-order guide post 204 are provided on the mounting post 202 in this order; the diameter of the first-order guide column 204 is smaller than the inner diameter of the mounting hole 500, and the diameter of the second-order guide column 203 is equal to the inner diameter of the mounting hole 500; thus, at the moment when the mounting post 202 is press-riveted into the mounting hole 500, the first-order guide post 204, the second-order guide post 203 and the mounting post 202 form a conical shape, which not only reduces the impact force, but also can smoothly enter into the mounting hole 500 of the heat sink main body 100.

Since the heat sink main body 100 is mounted on the PCBA, the environment in which the PCBA is used has the influence of temperature and humidity. Thus, the fixing member 200 is made of copper, which is likely to cause chemical reaction to generate verdigris, thereby affecting the reliability of the product. A nickel plating protective layer is added to the fixing member 200.

This fin main part 100 and mounting 200 adopt the interference fit of riveting to improve the radiating effect, processing is convenient, reduces the processing consumption, has greatly improved production efficiency. Because the contact surface of the radiating fin main body 100 is stressed in a balanced manner, the stressed contact surface can be in perfect contact, and the smooth heat transfer path is ensured.

The mounting column 202 of the fixing piece 200 of the integrated radiating fin provided by the utility model is connected with the radiating fin main body 100 in an interference manner, so that when the threaded column 201 needs to be disassembled, the mounting column 202 and the radiating fin can be firmly mounted, and knurling is arranged on the mounting column 202, so that the friction force between the mounting column 202 and the mounting hole 500 of the radiating fin can be increased, and the mounting column 202 is prevented from slipping in the mounting hole 500 when the threaded column 201 is disassembled.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An integrated heat sink is characterized by comprising a heat sink main body (100) and a fixing member (200), wherein one side of the heat sink main body (100) is provided with a plane, and the other side of the heat sink main body (100) is provided with a plurality of heat dissipation fins (300);

be provided with mounting hole (500) on fin main part (100), mounting (200) are provided with the annular knurl including screw thread post (201) and mounting post (202) of being connected with screw thread post (201) on mounting post (202), just mounting post (202) interference is installed in mounting hole (500).

2. The one-piece heat sink according to claim 1, wherein a plurality of the heat sink fins (300) form two fixing regions (400) for fixing the heat sink body (100) on the heat sink body (100);

one fixing area (400) is provided with one mounting hole (500), the other fixing area (400) is provided with two mounting holes (500), and the connecting lines of the three mounting holes (500) form a triangle; and a fixing member (200) for fixing the heat sink main body (100) is provided in the mounting hole (500).

3. The integrated heat sink according to claim 2, wherein a triangle formed by connecting lines of the three mounting holes (500) is an acute triangle.

4. The integrated heat sink according to claim 1, wherein the inner diameter of the mounting hole (500) is 2.4 mm.

5. The one-piece heat sink of claim 1, wherein the knurls have a depth of 1.7 mm.

6. The integrated heat sink as claimed in claim 1, wherein the fixing member (200) further comprises a first-order guide pillar (204) and a second-order guide pillar (203), and the mounting pillar (202), the second-order guide pillar (203) and the first-order guide pillar (204) are connected in sequence, and the diameters of the mounting pillar (202), the second-order guide pillar (203) and the first-order guide pillar (204) are reduced in sequence.

7. The integral heat sink as recited in claim 6, wherein the diameter of the mounting stud (202) is 2.6mm, the diameter of the second order guide stud (203) is 2.4mm, and the diameter of the first order guide stud (204) is 2.2 mm.

8. The integrated heat sink as claimed in claim 1, wherein the screw post (201) is provided with a screw hole (205), and the mounting hole (500) of the fixing member (200) is inserted from the planar side of the heat sink main body (100).

9. The integrated heat sink as recited in claim 1, wherein the heat sink body (100) is aluminum.

10. The one-piece heat sink as recited in claim 1, wherein the heat sink fin (300) is of unitary construction with the heat sink body (100).