Radiator, PCB and power tube combined structure convenient to install

Abstract

The utility model relates to a radiator, PCB (printed circuit board) and power tube combined structure, in particular to a radiator, PCB and power tube combined structure convenient to install. According to the structure, a plurality of connecting through holes are formed in a radiator body in the vertical direction, and each connecting through hole comprises a connecting blind hole formed in the upper side of the radiator body and a connecting bottom hole formed in the bottom of the connecting blind hole; a plurality of connecting holes are formed in the mounting substrate, and the connecting holes correspond to the connecting bottom holes one to one; a plurality of through holes are formed in the PCB body; and the plurality of fasteners are respectively arranged in the corresponding connecting blind holes. According to the utility model, the problems that the layout and the strength are influenced by too large holes in the PCB and the assembly efficiency is low due to the fact that fasteners are easy to fall off and difficult to install during installation can be avoided. And the fastener does not need to be taken out during each disassembly, and only the fastener needs to be withdrawn from the connecting hole, so that the fastener is blocked by the PCB and cannot be separated from the blind hole of the radiator, thereby achieving the effect of no loosening, and improving the maintenance efficiency.

Description

Technical Field

[0001] This utility model relates to a combination structure of a heat sink, a PCB board, and a power transistor, specifically a combination structure of a heat sink, a PCB board, and a power transistor that is easy to install. Background Technology

[0002] Power transistors, as core components of electronic power technology, are widely used in many popular fields such as industrial power supplies, electric vehicles, and energy storage. Due to their small size and high heat generation, they often need to be dissipated by mounting on heat sinks. Common heat sinks include profile heat sinks, machined heat sinks, and molded heat sinks. However, due to the limitations of power transistor packaging, when power transistors are soldered perpendicular to the PCB board, the common mounting method is either bottom-up or top-down.

[0003] like Figure 1 As shown in Figure a, when the heat sink body 3 is installed from bottom to top, the equipment or components need to be flipped during disassembly and assembly so that the fastener 5 can be installed from the mounting base 2 to the PCB body. It is also affected by the assembly sequence. Especially when there are too many stacked equipment layers, this structure can only be placed on the top or bottom layer, which greatly affects the overall layout of the equipment.

[0004] like Figure 1 As shown in Figure b, the top-down installation of the heatsink body 3 avoids the problems of flipping, assembly sequence issues, and layout problems associated with bottom-up installation. However, this structure requires holes to be drilled in the PCB body 1 at the positions corresponding to the fasteners 5 to facilitate the installation of the fasteners 5. The need to insert the fasteners 5 into the mounting holes results in larger hole diameters, affecting the PCB layout and strength. During installation, the fasteners 5 are difficult to insert into the mounting holes. When using a magnetic screwdriver (installation tool 01) to attract the fasteners 5, they are prone to falling off, and once detached, they are difficult to remove. If austenitic stainless steel fasteners (installation tool 01) are used, their weak magnetism prevents the screwdriver from attracting them, making installation extremely difficult and severely impacting assembly efficiency. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problems of existing heat sinks that, when installed from top to bottom, easily affect the layout and strength of the PCB board, and make it difficult to insert fasteners into the mounting holes, resulting in high installation difficulty and low assembly efficiency. The present invention provides a heat sink, PCB board and power transistor combination structure that is easy to install.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] An easy-to-install heat sink, PCB board and power transistor combination structure includes a PCB board body, a mounting base, a heat sink body, a power transistor body and fasteners.

[0008] The PCB board body and the mounting base are positioned opposite each other on the upper and lower sides of the heat sink body, with a gap between the upper side of the heat sink body and the back of the PCB board body, and the lower side abutting against the upper side of the mounting base; the power transistor body is mounted at a set position on the PCB board body and mounted on the vertical side wall of the heat sink body.

[0009] Its special feature is:

[0010] The heat sink body has multiple connecting through holes along its vertical direction. These connecting through holes include connecting blind holes on the upper side of the heat sink body and connecting bottom holes at the bottom of the connecting blind holes. The mounting substrate has multiple connecting holes, each corresponding to a connecting bottom hole, and all are adapted to fasteners. The diameter of the connecting blind holes is larger than the diameter of the connecting bottom holes. The PCB board body has multiple through holes, each corresponding to a connecting through hole, and their diameters are adapted to the size of the fastener installation tool to facilitate the passage of the installation tool. There are multiple fasteners, each set in a corresponding connecting blind hole, used to pass through the connecting bottom hole and connect to the connecting hole under the control of the installation tool, so as to assemble the heat sink body and the mounting substrate.

[0011] Furthermore, the fastener is a screw, and the connecting hole is a threaded hole adapted to the screw; the diameter of the connecting blind hole is larger than the diameter of the screw nut, and the depth is larger than the thickness of the screw nut.

[0012] Furthermore, the multiple connecting through holes are divided into two groups, with each group having at least one connecting through hole; the two groups of connecting through holes are respectively located at both ends of the radiator body along its length.

[0013] Furthermore, each group of connecting through holes has two.

[0014] The beneficial effects of this utility model are:

[0015] The radiator in this invention adopts a top-down installation method, which solves the problems of flipping, assembly sequence and layout caused by the bottom-up installation method.

[0016] It also employs specially designed through-holes, avoiding the problems of excessively large PCB openings affecting layout and strength, as well as the low assembly efficiency caused by easy fastener detachment and difficult installation, which are common with conventional top-down installation methods. Furthermore, it eliminates the need to remove screws every time the device is disassembled; simply pull the screw out of the threaded hole, and the screw will be obstructed by the underside of the PCB board, preventing it from exiting the blind hole of the heatsink, thus achieving a secure, non-detachable effect and improving maintenance efficiency. Attached Figure Description

[0017] Figure 1These are schematic diagrams of the existing heat sink, power supply, and PCB board installation structure. A is a bottom-up installation diagram, and b is a top-down installation diagram.

[0018] Figure 2 This is a schematic diagram of the installation of the PCB board body and the power transistor body in an embodiment of this utility model;

[0019] Figure 3 This is a half-sectional view of the radiator body in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the installation process of an embodiment of the present invention.

[0021] In the picture:

[0022] 01-Installation tools;

[0023] 1-PCB board body, 2-mounting substrate, 3-heat sink body, 4-power transistor body, 5-fastener, 6-connecting through hole, 61-connecting blind hole, 62-connecting bottom hole, 7-connecting hole, 8-through hole. Detailed Implementation

[0024] To make the objectives, advantages, and features of this utility model clearer, the following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides an easy-to-install combination structure of a heat sink, PCB board, and power transistor. The advantages and features of this utility model will become clearer according to the following specific embodiments.

[0025] See Figures 2-4 This utility model relates to the structure and installation process of a power transistor heatsink. The design mainly consists of five parts: PCB board body 1, power transistor body 4, heatsink body 3, fasteners 5, and mounting base plate 2.

[0026] by Figure 4 With the vertical direction as a reference, the PCB board body 1 and the mounting base 2 are positioned opposite each other on the upper and lower sides of the heat sink body 3. There is a gap between the upper side of the heat sink body 3 and the back of the PCB board body 1, and the lower side abuts against the upper side of the mounting base 2. The power transistor body 4 is installed at a set position on the PCB board body 1. The PCB board body 1 and the power transistor body 4 are connected by conventional soldering. The power transistor body 4 is installed vertically, which occupies less space and has a compact structure. At the same time, the power transistor body 4 is also installed on the vertical side wall of the heat sink body 3.

[0027] like Figure 3As shown, the heat sink body 3 has multiple connecting through holes 6 along its vertical direction. In this embodiment, according to installation requirements, the number of connecting through holes 6 is set to four. The four connecting through holes are divided into two groups, respectively located at both ends of the upper side of the heat sink body 3 along its length. Each of the four connecting through holes 6 includes a connecting blind hole 61 located on the upper side of the heat sink body 3 and a connecting bottom hole 62 located at the bottom of the connecting blind hole 61; and the connecting blind hole 61 and the connecting bottom hole 62 are interconnected. Four connecting holes 7 are provided on the mounting base plate 2. The four connecting holes 7 are corresponding one-to-one with the four connecting bottom holes 62, and are all adapted to the fasteners 5. The diameter of the connecting blind hole 61 is larger than the diameter of the connecting bottom hole 62, and the depth is greater than the thickness of the screw nut, so as to facilitate the pre-placement of the fasteners 5 into the connecting blind holes 61 and ensure that the fasteners 5 are completely sunk into the connecting through holes 6.

[0028] In this embodiment, the fastener 5 is specifically a screw, and the connecting hole 7 is correspondingly set as an internal thread hole to facilitate the installation of the screw. Four through holes 8 are provided on the PCB board body 1. The four through holes 8 are set one-to-one with the four connecting through holes 6, and their hole diameters are adapted to the screwdriver so that the screwdriver can pass through to tighten the screw.

[0029] There are four screws, and the four fasteners 5 are respectively set in the connection blind hole 61. Under the control of the screwdriver, they pass through the connection bottom hole 62 and are threaded to the connection hole 7, thereby assembling the heat sink body 3 and the mounting base plate 2.

[0030] With the aforementioned settings, the diameter of the through hole 8 on the PCB board body 1 does not need to be matched with the maximum radial dimension of the fastener 5. Only a hole large enough for the screwdriver shaft diameter to pass through needs to be designed, thereby reducing the size of the opening on the PCB board body 1 and improving the structural strength of the PCB board body 1.

[0031] In practical implementation, it is necessary to select screws of appropriate length based on the height of the heat sink body 3 and the distance between the top surface of the heat sink body 3 and the lower surface of the PCB board body 1. First, ensure that the screws can be installed as intended. Figure 4 As shown, the screws are installed in a normal fastening manner. At the same time, since the diameter of the through hole 8 on the PCB board body 1 is much smaller than the diameter of the connecting through hole 6, the screws will not come out of the blind hole due to the constraint of the lower surface of the PCB board body 1 when the screws are not tightened, thus achieving the effect of the screws not coming out even when loose.

Claims

1. A heat sink, PCB board and power transistor assembly structure that is easy to install, comprising a PCB board body (1), a mounting base (2), a heat sink body (3), a power transistor body (4) and fasteners (5); The PCB board body (1) and the mounting substrate (2) are disposed opposite to each other on the upper and lower sides of the heat sink body (3), and there is a gap between the upper side of the heat sink body (3) and the back of the PCB board body (1), and the lower side abuts against the upper side of the mounting substrate (2); the power tube body (4) is vertically soldered to the preset solder point position on the PCB board body (1) and installed on the vertical side wall of the heat sink body (3); Its features are: The heat sink body (3) is provided with a plurality of connecting through holes (6) along the vertical direction. Each of the plurality of connecting through holes (6) includes a connecting blind hole (61) provided on the upper side of the heat sink body (3) and a connecting bottom hole (62) provided at the bottom of the connecting blind hole (61). The mounting base plate (2) is provided with a plurality of connecting holes (7). The plurality of connecting holes (7) are provided one-to-one with the plurality of connecting bottom holes (62) and are all adapted to the fasteners (5). The diameter of the connecting blind hole (61) is larger than the diameter of the connecting bottom hole (62). The PCB board body (1) is provided with a plurality of through holes (8), and the plurality of through holes (8) are provided one-to-one with a plurality of connecting through holes (6), and their hole diameter is adapted to the size of the installation tool (01) of the fastener (5) so that the installation tool (01) can pass through. The number of fasteners (5) is multiple, and the multiple fasteners (5) are respectively disposed in the corresponding connection blind holes (61) for passing through the connection bottom hole (62) and connecting to the connection hole (7) under the control of the installation tool (01) to assemble the heat sink body (3) and the mounting base plate (2).

2. The easily installable heat sink, PCB board, and power transistor combination structure according to claim 1, characterized in that: The fastener (5) is a screw, and the connecting hole (7) is a threaded hole adapted to the screw; The diameter of the connecting blind hole (61) is larger than the diameter of the screw nut, and the depth is larger than the thickness of the screw nut.

3. The easily installable heat sink, PCB board, and power transistor combination structure according to claim 1 or 2, characterized in that: The plurality of connecting through holes (6) are divided into two groups, and the number of connecting through holes (6) in each group is at least one; The two sets of connecting through holes (6) are respectively located at both ends of the radiator body (3) along its length.

4. The easily installable heat sink, PCB board, and power transistor combination structure according to claim 3, characterized in that: The number of connecting through holes (6) in each group is two.

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