Tight riveting structure of heat dissipation aluminum bottom and heat pipe

Abstract

The application discloses a structure of tightly riveting heat dissipation aluminum bottom and heat pipe, comprising heat dissipation aluminum bottom, heat pipe and foot stand. When the heat dissipation aluminum bottom is made, first, an arch part is punched downward on the upper surface of the thin aluminum plate, the arch part protrudes from the lower surface of the thin aluminum plate, the inside of the arch part is configured to form a concave cavity, the inside shape and size of the concave cavity are consistent with the bottom and the outer surface of the two sides of the heat pipe, the depth of the concave cavity is greater than the thickness of the heat pipe, then, the bottom of the arch part is shaped upward to form two bosses respectively located on the two sides of the upper end opening, the thickness of the boss is less than the thickness of the thin aluminum plate, and the depth of the concave cavity after the upward shaping is equal to the thickness of the heat pipe; the heat pipe is put into the concave cavity from the upper end opening of the concave cavity, then the bosses on the two sides are deformed toward the heat pipe by riveting and pressing to be flat with the upper surface of the thin aluminum plate, so that the bottom and the outer surface of the two sides of the heat pipe are tightly combined with the heat dissipation aluminum bottom, and the two side top ends of the heat pipe are riveted and fixed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat dissipation device technology, in particular to a tight-fitting riveting structure of a heat dissipation aluminum bottom and a heat pipe. BACKGROUND

[0002] Known various portable electronic devices, such as mobile phones, laptops, tablet computers, MP3, MP4, iPad, PDA, GPS and other portable electronic devices, due to the rapid progress of science and technology, the volume appearance becomes more and more thin and light, but the operation function is more and more powerful, so that the internal central processing unit (CPU) and integrated circuit (IC) or other heat generating components will generate very high heat when operating, so it is necessary to remove the high heat to ensure the normal operation of the heat generating components and maintain the service life.

[0003] In CN 202285480 U, the containing grooves of the heat dissipation bottom plate structure are obviously larger than the size of the initial state of the heat pipe, and the thickness of the heat pipe is obviously larger than the depth of the containing grooves. After the heat pipe is put in, the convex ribs and the heat pipe are riveted by mechanical flat processing. Although the thickness of the heat pipe is reduced to match the depth of the containing grooves after the heat pipe is deformed by extrusion, and the size of the heat pipe is increased after the heat pipe is deformed by extrusion, the ideal state of the processing design is that the size of the heat pipe after being deformed by extrusion matches the internal size of the containing grooves. In fact, due to the precision of material deformation and uncontrollable factors, a gap is often generated between the heat pipe and the containing grooves, which affects the tightness and tightness between the heat pipe and the heat dissipation bottom plate, and directly affects the heat transfer efficiency. Although the document also introduces that the containing grooves have a heat conducting medium, such as heat conducting paste, on both sides and the bottom, so as to fill the gap between the containing grooves and the heat pipe when the heat pipe is deformed by extrusion, increase the contact between the heat pipe and the containing grooves, and provide better heat transfer effect, on the one hand, the way of adding heat conducting medium increases the processing difficulty and the cost, on the other hand, it can improve the gap problem, but it cannot completely eliminate the gap in the true sense, and it will lead to the phenomenon that the thickness of the heat conducting medium is not the same. In addition, due to the large deformation of the heat pipe and the heat dissipation bottom plate, two escape grooves need to be provided on the heat dissipation bottom plate. When the heat pipe is embedded and mechanically riveted and flat processed, the convex ribs are used to hold the heat pipe, and the escape grooves are used to accommodate the excess metal formed after the mechanical riveting and flat processing, so that the surface of the heat dissipation bottom plate structure can be kept flat. Therefore, the manufacturing of the heat dissipation bottom plate becomes more complex. Moreover, due to the large deformation of the heat pipe and the heat dissipation bottom plate, the thickness of the heat dissipation bottom plate needs to be designed to be relatively thick to withstand the riveting deformation pressure, which leads to a relatively heavy overall structure and a smaller space for accommodating the heat pipe in the heat dissipation structure of the same size. In fact, as described in the document, in general cases, the escape grooves cannot be completely filled and remain on the surface of the heat dissipation bottom plate, and they can only form a general flat surface. Therefore, the heat dissipation effect is still limited, and it is difficult to meet the demand for smaller application space and better heat dissipation effect.

[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. SUMMARY

[0005] Therefore, it is necessary to study a new technical solution to solve the above problems.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] A heat dissipation aluminum base and a heat pipe are tightly riveted together, comprising a heat dissipation aluminum base, a heat pipe and a foot stand, the heat pipe is riveted and clamped on the heat dissipation aluminum base, and the foot stand is installed on the bottom of the heat dissipation aluminum base; when the heat dissipation aluminum base is manufactured, an arch-shaped part is first punched downward on the top of a thin aluminum plate, the arch-shaped part protrudes below the thin aluminum plate, the inside of the arch-shaped part is configured to form a concave cavity, the concave cavity has an upper opening, the inside shape and size of the concave cavity are consistent with the bottom and the outer surface of the two sides of the heat pipe, and the depth of the concave cavity is greater than the thickness of the heat pipe; then, the bottom of the arch-shaped part is shaped upward to form two bosses located on the two sides of the upper opening respectively, the bosses are upwardly protruding from the two sides of the top of the thin aluminum plate, the thickness of the bosses is less than the thickness of the thin aluminum plate, and the depth of the concave cavity after being shaped upward is equal to the thickness of the heat pipe.

[0008] The heat pipe is put into the concave cavity from the upper opening of the concave cavity, and then the bosses on the two sides are riveted and deformed towards the heat pipe to be flush with the top of the thin aluminum plate, so that the bottom and the outer surface of the two sides of the heat pipe are tightly fitted with the heat dissipation aluminum base, and the top ends of the two sides of the heat pipe are riveted and fixed.

[0009] As a preferred solution, the heat pipe is flat and thin, and the thickness is less than the width between the left and right end faces.

[0010] As a preferred solution, the thickness of the heat pipe is a plane on both sides, and the left and right end faces of the heat pipe are small arc faces.

[0011] As a preferred solution, the concave cavity of the heat dissipation aluminum base is a straight cavity or a non-straight special-shaped cavity.

[0012] As a preferred solution, the bottom left and right sides of the concave cavity on the heat dissipation aluminum base are respectively provided with foot stand mounting parts, and the foot stand is provided with two, which are respectively installed on the left and right sides.

[0013] As a preferred solution, the heat pipe is provided with one.

[0014] As a preferred solution, the heat pipe is provided with two or more, and all the heat pipes are arranged side by side in the concave cavity.

[0015] As a preferred solution, when the bottom of the arch-shaped part is shaped upward, a second protruding point is also formed, the second protruding point is upwardly extended from the inner bottom surface of the concave cavity, the second protruding point is convex upward with a small upper part and a large lower part, an extrusion recess is formed on the bottom of the arch-shaped part opposite to the lower part of the second protruding point; the second protruding point is arranged between adjacent heat pipes.

[0016] Compared with the prior art, the present application has obvious advantages and beneficial effects. Specifically, according to the above technical scheme, the arch-shaped part is formed by downward stamping of the thin aluminum plate, a concave cavity with a shape and size consistent with the heat pipe but with a depth greater than the thickness of the heat pipe is obtained, then the bottom of the arch-shaped part is shaped upward to form the bosses on both sides, and the thickness of the boss is less than the thickness of the thin aluminum plate, the depth of the concave cavity after upward shaping is equal to the thickness of the heat pipe, so that after the heat pipe is put into the concave cavity from the upper end opening of the concave cavity, the heat pipe and the inner wall surface of the concave cavity can form a close contact, and after the bosses on both sides are deformed towards the heat pipe and are riveted to be flat with the upper surface of the thin aluminum plate, the combination firmness of the heat pipe and the heat dissipation aluminum bottom is strengthened. Compared with the conventional technology, the heat dissipation aluminum bottom has the advantages of being lighter, thinner, and having a larger internal concave cavity space, can meet smaller application space, and can be suitable for heat pipes of any shape, has better close covering with the heat pipe, and is beneficial to improving the heat dissipation performance. The stamping method is simple in manufacturing process and suitable for popularization and application.

[0017] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below with reference to the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective assembly view of embodiment one of the present application;

[0019] Figure 2 is a perspective exploded view of embodiment one of the present application;

[0020] Figure 3 is a manufacturing process diagram of embodiment one of the present application;

[0021] Figure 4 is a perspective assembly view of embodiment two of the present application;

[0022] Figure 5 is a perspective exploded view of embodiment two of the present application;

[0023] Figure 6 is a perspective assembly view of embodiment three of the present application;

[0024] Figure 7 is a perspective exploded view of embodiment three of the present application;

[0025] Figure 8 is a manufacturing process diagram of embodiment three of the present application;

[0026] Figure 9 is a perspective assembly view of embodiment four of the present application;

[0027] Figure 10 is a perspective exploded view of embodiment four of the present application.

[0028] The drawing mark explanation:

[0029] Aluminum base 10 Aluminum sheet 101

[0030] Arch 102 Cavity 103

[0031] Boss 104 First bump 105

[0032] Third connecting hole 106 Second bump 107

[0033] Extrusion recess 108 Heat pipe 20

[0034] Stand 30 First connecting hole 31

[0035] Second connecting hole 32. DETAILED DESCRIPTION

[0036] Please refer to Figures 1 to 10 The specific structure of various embodiments of the present application is shown.

[0037] In the description of the present application, it should be noted that for orientation words, such as terms "up", "down", "front", "back", "left", "right", etc. The orientation and position relationship shown in the drawing is based on the orientation or position relationship shown in the drawing, only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0038] As Figures 1 to 3 The specific structure of example one is shown:

[0039] A tight-fitting riveting structure of a heat dissipation aluminum base and a heat pipe, comprising a heat dissipation aluminum base 10, a heat pipe 20 and a stand 30, the heat pipe 20 is clamped and fixed on the heat dissipation aluminum base 10, and the stand 30 is installed on the bottom of the heat dissipation aluminum base 10.

[0040] Manufacture of heat dissipation aluminum base 10, heat pipe 20, stand 30 and riveting assembly, comprising the following steps:

[0041] Step 1, prepare the heat dissipation aluminum base 10, heat pipe 20; wherein, the heat pipe 20 is provided with one. The heat pipe 20 is thin and flat in shape, and the thickness is less than the width between the left and right end faces; the thickness of the heat pipe 20 on both sides (also referred to as upper end face, lower end face) is flat, and the left end face and the right end face of the heat pipe 20 are small arc faces (small convex arc faces).

[0042] As Figure 3As shown, when manufacturing the heat dissipation aluminum base 10, a thin aluminum plate 101 is first prepared. An arched portion 102 is punched downwardly from the top of the thin aluminum plate 101. The arched portion 102 protrudes from the bottom of the thin aluminum plate 101. The interior of the arched portion 102 forms a concave cavity 103. The concave cavity 103 of the heat dissipation aluminum base 10 is a straight cavity. The concave cavity 103 has an upper opening. The internal shape and dimensions of the concave cavity 103 are consistent with the bottom and outer surfaces of the heat pipe 20. The depth of the concave cavity 103 must be greater than the thickness of the heat pipe 20. Then, the bottom of the arched portion 102 is shaped upward to form two bosses 104 located on either side of the upper opening. The bosses 104 protrude upward from the top of the thin aluminum plate 101. The thickness of the bosses 104 is less than the thickness of the thin aluminum plate 101. Moreover, the depth of the upwardly shaped concave cavity 103 is equal to the thickness of the heat pipe 20.

[0043] Step 2: Place the heat pipe 20 into the concave cavity 103 from the upper opening of the concave cavity 103, and then rivet and deform the bosses 104 on both sides toward the heat pipe 20 until they are flush with the top of the thin aluminum plate 101, so that the bottom and the outer surfaces of both sides of the heat pipe 20 are tightly fitted with the heat dissipation aluminum base 10, and the top ends of both sides of the heat pipe 20 are riveted and fixed.

[0044] Step 3. Install the tripod 30 on the bottom of the heat dissipating aluminum base 10. The heat dissipating aluminum base 10 is provided with a tripod mounting portion on the left and right sides of the bottom corresponding to the concave cavity 103. The tripod 30 is provided with two tripods, which are respectively installed on the bottom of the left and right tripod mounting portions. The tripod 30 is provided with a first connecting hole 31. The upper surface of the tripod mounting portion is punched out with a first protrusion 105 facing downward. The first protrusion 105 protrudes from the bottom of the tripod mounting portion. The first protrusion 105 passes through the first connecting hole, and the bottom of the first protrusion 105 is riveted and positioned on the bottom of the tripod 30. Screw locking can also be used. For example, the tripod 30 is provided with a second connecting hole 32, and the tripod mounting portion is provided with a third connecting hole 106. The second connecting hole 32 and the third connecting hole 106 are locked by screws.

[0045] like Figures 4 to 5 , which shows the specific structure of Example 2; the structure of Example 2 is basically the same as that of Example 1, with the main difference being that the cavity 103 of the heat dissipating aluminum base 10 is a non-straight, irregularly shaped cavity. Since the heat dissipating aluminum base 10 is stamped from a thin aluminum plate 101, the shape of the cavity 103 can be arbitrarily designed, and therefore, it can accommodate heat pipes 20 of any shape.

[0046] like Figures 6 to 8The figure shows the specific structure of Example 3. The structure of Example 3 is essentially the same as that of Example 1, with the main difference being that two (or more) heat pipes 20 are provided, all arranged side by side within the cavity 103. When the bottom of the arched portion 102 is shaped upward, a second protrusion 107 is formed. This second protrusion 107 extends upward from the inner bottom surface of the cavity 103. This second protrusion 107 is convex, smaller at the top and larger at the bottom. A compression recess 108 is formed at the bottom of the arched portion 102, directly opposite the second protrusion 107. The second protrusion 107 is positioned between adjacent heat pipes 20. The two side surfaces of the second protrusion 107 are concavely curved, matching the convex outer surfaces of the heat pipes 20 near the bottom. This provides a better positioning of adjacent heat pipes 20, while also improving the contact tightness and increasing the contact area between the heat pipes 20 and the aluminum heat sink 10.

[0047] like Figures 9 to 10 As shown, it shows the specific structure of the fourth embodiment; the structure of the fourth embodiment is basically the same as that of the first embodiment, the main difference is that: there are two (or more than two) heat pipes 20, and all the heat pipes 20 are arranged side by side in the cavity 103.

[0048] The key point of the design of the present invention is that it mainly uses a thin aluminum plate 101 to stamp downward to form an arched portion 102, thereby obtaining a concave cavity 103 that is consistent with the shape and size of the heat pipe 20 but has a depth greater than the thickness of the heat pipe 20. Then, the bottom of the arched portion 102 is shaped upward to form bosses 104 on both sides, and the thickness of the bosses 104 is less than the thickness of the thin aluminum plate 101. The depth of the concave cavity 103 after upward shaping is equal to the thickness of the heat pipe 20. In this way, when the heat pipe 20 is placed into the concave cavity 103 from the upper end opening, the heat pipe 20 and the concave cavity 103 are in contact. The inner wall surface can form a fitting contact, and after the bosses 104 on both sides are riveted and deformed toward the heat pipe 20 until they are flush with the upper surface of the thin aluminum plate 101, the bonding strength between the heat pipe 20 and the heat dissipation aluminum base 10 is strengthened. Compared with traditional technologies, this heat dissipation aluminum base 10 has the advantages of being lighter, thinner, and having a larger internal cavity 103 space, which can meet smaller application spaces. Moreover, it can be suitable for heat pipes 20 of any shape, and the fit and coating with the heat pipe 20 are better, which is conducive to improving heat dissipation performance. The stamping method is used, the manufacturing process is simple, and it is suitable for popularization and application.

[0049] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A tight-fitting riveted structure for a heat dissipation aluminum base and a heat pipe, comprising the heat dissipation aluminum base, the heat pipe, and a bracket, wherein the heat pipe is riveted and clamped to the heat dissipation aluminum base, and the bracket is mounted on the bottom of the heat dissipation aluminum base, characterized in that: When manufacturing the heat dissipating aluminum base, an arched portion is first stamped downward on the top of a thin aluminum plate. The arched portion protrudes from the bottom of the thin aluminum plate. The interior of the arched portion is enclosed to form a concave cavity with an upper opening. The internal shape and dimensions of the concave cavity are consistent with the bottom and outer surfaces of the heat pipe on both sides. The depth of the concave cavity must be greater than the thickness of the heat pipe. Then, the bottom of the arched portion is shaped upward to form two bosses located on either side of the upper opening. The bosses protrude upward from the upper sides of the thin aluminum plate. The thickness of the bosses is less than the thickness of the thin aluminum plate. Moreover, the depth of the concave cavity after upward shaping is equal to the thickness of the heat pipe. Place the heat pipe into the cavity from the upper opening, then rivet and deform the bosses on both sides toward the heat pipe until they are flush with the top of the thin aluminum plate, so that the bottom and outer surfaces of the heat pipe are tightly fitted with the heat dissipation aluminum base, and the top ends of both sides of the heat pipe are riveted and fixed.

2. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 1, characterized in that: The heat pipe is flat and thin, and its thickness is smaller than the width between the left and right end faces.

3. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 2, characterized in that: Both sides of the heat pipe are flat, and the left end face and the right end face of the heat pipe are small arc surfaces.

4. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 1, characterized in that: The concave cavity of the heat dissipation aluminum bottom is a straight cavity or a non-straight special-shaped cavity.

5. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 1, characterized in that: The heat dissipating aluminum bottom is provided with a tripod mounting portion on the left and right sides of the bottom corresponding to the concave cavity, and two tripods are provided, which are respectively installed on the left and right sides.

6. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 1, characterized in that: The heat pipe is provided with one.

7. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 1, characterized in that: There are more than two heat pipes, and all the heat pipes are arranged side by side in the concave cavity.

8. The tight-fitting riveted structure of the heat dissipation aluminum base and the heat pipe according to claim 7, characterized in that: When the bottom of the arched portion is shaped upward, a second protrusion is also formed. The second protrusion extends upward from the inner bottom surface of the cavity. The second protrusion is convex and small at the top and large at the bottom. An extrusion recess is formed at the bottom of the arched portion directly opposite to the bottom of the second protrusion. The second protrusion is spaced and positioned between adjacent heat pipes.

Images