Combined power device mounting structure

Abstract

The utility model discloses a combined type power device installation structure which comprises a radiator, a pressing strip, a screw and a sliding block. The pressing strip comprises a first bending portion and a second bending portion which are integrally formed, a sliding groove is formed in the side portion of the radiator, the sliding block is matched with the sliding groove, one end of the sliding block is embedded in the sliding groove in a sliding mode, and the other end of the sliding block is detachably connected with the first bending portion of the pressing strip through a screw. The threaded hole in the sliding block and the threaded hole in the first bent part incline upwards so that the screw can be screwed in obliquely. And the second bending part of the pressing strip is pressed on the power device, so that the power device is tightly pressed on the side part of the radiator. The utility model has the characteristics of compact structure and convenient operation, can utilize the slide block to move to the position where the power device needs to be pressed along the chute at the side part of the radiator, is beneficial to the PCB layout of the device, and the screw is tightly screwed down in an inclined way through a screwdriver and is not interfered by surrounding devices, so that the product is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of switching power supplies, and particularly relates to a combined power device mounting structure. Background Art

[0002] One of the installation methods of traditional TO220 package and TO247 package plug-in power devices is that screws pass through the device heat dissipation holes and are fixedly installed on the radiator. This method is relatively direct and common, but it is not applicable to the application requirements of rail transit products with high voltage resistance and insulation requirements. Another method is to press a pressure bar or a spring piece on the black plastic body of the device, and then use screws to fix the pressure bar or the spring piece. In order to meet the insulation and voltage resistance requirements, the device is usually sleeved with a mica bag. However, it is found in actual applications that when using a pressure bar for fixation, in a power supply product with a dense radiator and devices, when performing subsequent maintenance, the screwdriver needs to be placed flat to screw the screws, and the screws are not convenient to remove, resulting in the need to remove many surrounding devices during maintenance to replace the possibly damaged switching device. In addition, when using a spring piece to press the device, in long-term on-site use, small deformations of the spring piece have occurred, resulting in a decrease in elastic force and causing the device to overheat and be damaged. In addition, both the pressure bar and the spring piece pressing device methods require screw fixing holes to be opened at specific positions for heat dissipation, which limits the flexibility of the device placement position in the PCB design and is not conducive to the subsequent standardization of radiators for different power supplies. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is that the traditional scheme of pressing power devices with a pressure bar or a spring piece is limited by the requirements of opening holes for screw and pressure bar fixing positions, which is not conducive to device layout. The traditional installation method requires a screwdriver to be placed parallel to screw the screws, and the traditional screw fixing cannot be used in scenarios with high insulation and voltage resistance requirements. The utility model provides a combined power device mounting structure with a compact structure, convenient operation, good insulation and voltage resistance performance, and is conducive to the PCB layout of devices.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A combined power device mounting structure includes: a radiator, a pressure bar, a screw, and a slider; the pressure bar includes an integrally formed first bending part and a second bending part, a chute is provided on the side of the radiator, the slider is matched with the chute, one end of the slider is slidably nested in the chute, the other end of the slider is detachably connected to the first bending part of the pressure bar through a screw, and the threaded holes on the slider and the first bending part are both inclined upward to realize the inclined screwing of the screw; the second bending part of the pressure bar presses on the power device to press the power device against the side of the radiator.

[0006] As a further improvement of the utility model, an insulating sheet is further included, and the insulating sheet is located between the power device and the radiator.

[0007] As a further improvement of the present utility model, the cross-sectional dimension of the insulating sheet is larger than that of the power device.

[0008] As a further improvement of the present utility model, one end of the sliding groove is a right-angle structure, the other end of the sliding groove is an acute-angle structure, and the acute-angle end of the sliding groove is close to the insulating sheet.

[0009] As a further improvement of the present utility model, a positioning groove is provided at the end of the slider, and a protrusion is provided at the end of the first bent portion, and the protrusion matches the positioning groove.

[0010] As a further improvement of the present utility model, the end of the second bent portion is upturned.

[0011] As a further improvement of the present utility model, sliding grooves are symmetrically provided on two sides of the radiator.

[0012] As a further improvement of the present utility model, the pressing strip is integrally made of an elastic material.

[0013] As a further improvement of the present utility model, the insulating sheet is made of a mica bag or an alumina ceramic sheet or a aluminum nitride ceramic sheet.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] The combined power device mounting structure of the present utility model realizes the mounting of the power device on the radiator by providing a sliding groove on the side surface of the radiator, slidingly nesting one end of the slider in the sliding groove, detachably connecting the other end of the slider to the first bent portion of the pressing strip by a screw, and pressing the second bent portion of the pressing strip on the power device. Moreover, the threaded holes on the slider and the first bent portion are both inclined upward, and the screw is tightened obliquely downward by a screwdriver, which will not be interfered by surrounding devices, facilitating the maintenance of the product. Also, since the slider and the pressing strip are decoupled from the radiator, the slider can move to any position on the sliding groove of the radiator, enabling the layout of the power device not to need to correspond and lock with the screw mounting hole position of the radiator, making the PCB layout position of the power device more flexible and more beneficial for the subsequent standardization of the radiator. Description of the Drawings

[0016] Figure 1 is the front view structural principle schematic diagram of the combined power device mounting structure in a specific embodiment of the present utility model;

[0017] Figure 2 is the side view structural principle schematic diagram of the combined power device mounting structure in a specific embodiment of the present utility model;

[0018] Legend: 1. Radiator; 11. Slide groove; 2. Pressure strip; 21. First bending part; 22. Second bending part; 211. Protrusion; 3. Screw; 4. Slide block; 41. Positioning groove; 5. Insulating sheet; 6. Power device. Detailed implementation mode

[0019] The following further describes the present invention in conjunction with the accompanying drawings of the specification and specific preferred embodiments, but does not limit the protection scope of the present invention thereby.

[0020] In the description of the present invention, it should be understood that the terms "side part", "center", "longitudinal direction", "transverse direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0022] Embodiment

[0023] As Figure 1 and Figure 2 shown, the combined power device mounting structure of the present invention includes: a radiator 1, a pressure strip 2, a screw 3, and a slide block 4. The pressure strip 2 is integrally made of an elastic material. The pressure strip 2 includes an integrally formed first bending part 21 and a second bending part 22. A slide groove 11 is provided on the side of the radiator 1, and the slide block 4 is matched with the slide groove 11. One end of the slide block 4 is slidably nested in the slide groove 11 and can reciprocate on the surface of the radiator 1 along the slide groove 11; the other end of the slide block 4 is detachably connected to the first bending part 21 of the pressure strip 2 by a screw 3, and the threaded holes on the slide block 4 and the first bending part 21 are both inclined upward to realize the inclined screwing of the screw 3. The second bending part 22 of the pressure strip 2 presses on the power device 6 to press the power device 6 against the side of the radiator 1.

[0024] In this embodiment, a sliding groove 11 is provided on the side of the radiator 1, one end of the slider 4 is slidably nested in the sliding groove 11, and the other end of the slider 4 is detachably connected to the first bent portion 21 of the pressure strip 2 through a screw 3. The second bent portion 22 of the pressure strip 2 presses on the power device 6, that is, the power device 6 is installed on the radiator 1. Moreover, the threaded holes on the slider 4 and the first bent portion 21 both incline upward, and the screw 3 is tightened obliquely downward by a screwdriver, which will not be interfered by the surrounding devices and is convenient for product maintenance. Also, since the slider 4 and the pressure strip 2 are decoupled from the radiator 1, the slider 4 can move to any position on the sliding groove 11 of the radiator 1, so that the layout of the power device 4 does not need to be locked corresponding to the screw mounting holes of the radiator 1, the PCB layout position of the power device is more flexible, which is more beneficial for the subsequent unification of the radiator system.

[0025] In this embodiment, an insulating sheet 5 is further included. The insulating sheet 5 is fixed on the radiator 1 and is located between the power device 6 and the radiator 1. The insulation withstand voltage can be adjusted in design according to needs, and it is not affected by the spacing of the power device 6 itself. Moreover, the power device 6 is exposed to the air, which is more conducive to heat dissipation.

[0026] As Figure 1 shown, the cross-sectional dimension of the insulating sheet 5 is larger than that of the power device 6, and the power device 6 is located at the middle position of the insulating sheet 5 to ensure sufficient insulation between the power device 6 and the radiator 1.

[0027] As Figure 2 shown, one end of the sliding groove 11 is a right-angle structure, the other end of the sliding groove 11 is an acute-angle structure, and the acute-angle end of the sliding groove 11 is close to the insulating sheet 5. Correspondingly, one end of the slider 4 is also provided with a right-angle structure, and the other end is also provided with an acute-angle structure. When the slider 4 is nested inside the sliding groove 11 and the slider 4 is fixedly connected to the first bent portion 21 of the pressure strip 2 through a screw 3, the second bent portion 22 presses on the power device 6, and the pressure strip 2 will give the slider 4 a force towards the radiator 1, so that the slider 4 is more firmly buckled in the sliding groove 11.

[0028] As Figure 2 shown, a positioning groove 41 is provided at the end of the slider 4, and a protrusion 211 is provided at the end of the first bent portion 21. The protrusion 211 matches the positioning groove 41. When the pressure strip 2 is fixedly connected to the slider 4, the protrusion 211 is buckled in the positioning groove 41 to improve the connection stability between the pressure strip 2 and the slider 4.

[0029] As Figure 2 shown, the end of the second bent portion 22 warps upward to avoid damaging the power device 6.

[0030] As Figure 2As shown, sliding grooves 11 are symmetrically provided on two side faces of the radiator 1 to enable the installation of the power device 6 on both side faces of the radiator 1.

[0031] For application scenarios with low heat dissipation requirements, the insulating sheet 5 can be a mica bag or an alumina ceramic sheet. For scenarios with high heat dissipation requirements, the insulating sheet 5 can be an aluminum nitride ceramic sheet. The ceramic has good heat conduction performance and is insulated and withstands voltage, so that when the output power of the power device 6 is relatively large, the heat can still be effectively conducted to the radiator 1 and dissipated, effectively protecting the power device 6, extending its service life, and the ceramic sheet has a relatively low price, which can reduce the production cost.

[0032] Working principle: The first bent portion 21 of the pressing strip 2 is fixedly connected to the slider 4 through the screw 3. The second bent portion 21 of the pressing strip 2 is in interference fit with the power device 6, pressing the power device 6 on the insulating sheet 5, and the insulating sheet 5 is arranged on the radiator 1; the interference fit of the pressing strip 2 applies an elastic force to the power device 6, making the power device 6 firmly fixed and preventing it from being shaken off by vibration; at the same time, the power device 6 is in full contact with the insulating sheet 5, and the power device 6 is completely fixed, so that the heat dissipation of the power device 6 is stable. In this embodiment, the pressing strip 2, the slider 4, the radiator 1 and the power device 6 are decoupled, so that their positions are not restricted by the positions of the screw mounting holes, which can more conveniently arrange the PCB of the power device 6 to a greater extent. Compared with traditional power devices, it has greater advantages in the installation method.

[0033] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A combined power device mounting structure, characterized in that: include: A heat sink (1), a pressure strip (2), a screw (3) and a slider (4); the pressure strip (2) comprises an integrally formed first bending portion (21) and a second bending portion (22); a slide groove (11) is provided on the side of the heat sink (1); the slider (4) matches the slide groove (11); one end of the slider (4) is slidably nested in the slide groove (11); the other end of the slider (4) is detachably connected to the first bending portion (21) of the pressure strip (2) through a screw (3); and the threaded hole on the slider (4) and the threaded hole on the first bending portion (21) are both inclined upward to achieve inclined screwing of the screw (3); the second bending portion (22) of the pressure strip (2) is pressed on the power device (6) to achieve pressing the power device (6) against the side of the heat sink (1).

2. The combined power device mounting structure according to claim 1, characterized in that: It also includes an insulating sheet (5), wherein the insulating sheet (5) is located between the power device (6) and the heat sink (1).

3. The combined power device mounting structure according to claim 2, characterized in that: The cross-sectional dimensions of the insulating sheet (5) are greater than the cross-sectional dimensions of the power device (6).

4. The combined power device mounting structure according to claim 2, characterized in that: One end of the slide groove (11) is a right-angle structure, and the other end of the slide groove (11) is an acute-angle structure, and the acute-angle end of the slide groove (11) is close to the insulating sheet (5).

5. The combined power device mounting structure according to claim 4, characterized in that: The end of the sliding block (4) is provided with a positioning groove (41), and the end of the first bending portion (21) is provided with a protrusion (211), and the protrusion (211) matches the positioning groove (41).

6. The combined power device mounting structure according to claim 5, characterized in that: The end of the second bent portion (22) is tilted upward.

7. The combined power device mounting structure according to any one of claims 1 to 6, characterized in that: Slide grooves (11) are symmetrically arranged on two side surfaces of the radiator (1).

8. The combined power device mounting structure according to any one of claims 1 to 6, characterized in that: The pressure strip (2) is made of elastic material in one piece.

9. The combined power device mounting structure according to any one of claims 2 to 6, characterized in that: The insulating sheet (5) is made of a mica bag, an alumina ceramic sheet or an aluminum nitride ceramic sheet.

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