Power device connection structure

Abstract

The utility model relates to the technical field of circuit component connection, and provides a power device connection structure, which comprises a PCB (printed circuit board), a metal plate is fixed on the front surface of the PCB, a heat dissipation piece connection plate and a heat dissipation piece are fixed at two ends of the metal plate, a connection mechanism is arranged on the side surface of the metal plate, and the connection mechanism comprises a connection groove, a connection seat and a fixing bolt. The connecting groove is formed in the side face of the metal plate. Through the arrangement of the positioning structure, the collinear design of the positioning shaft and the positioning groove and the cooperation of the gradually-expanded guide groove, automatic centering during installation is achieved, the manual adjustment time is shortened, the diameter of the end, close to the positioning groove, of the guide groove is small, the funnel effect is formed, it is ensured that the positioning shaft can only be clamped in the correct direction, reverse installation is avoided, and the installation efficiency is improved. The device has a function of conveniently and accurately positioning the power device body during installation, and the stability and convenience of the power device connecting structure during use are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit component connection, in particular to a power device connection structure, and more particularly to an application occasion of installation and removal of a power device on a PCB board. Background Art

[0002] Power devices are core components of power electronics systems and are widely used in fields such as renewable energy generation, electric vehicles, industrial frequency conversion, and smart grids. As power electronics systems evolve toward higher power density, higher frequencies, and higher temperatures, traditional connection structures generate significant heat dissipation in power devices during use, resulting in high thermal resistance and elevated junction temperatures, impacting reliability and lifespan. Therefore, power device connection structures typically focus on addressing the heat dissipation and electrical reliability of the entire system after connection.

[0003] To this end, patent publication CN210868546U discloses a power device connection structure comprising a PCB, a power device, and a metal busbar. The power device comprises heat dissipation pins, driver pins, and functional pins. The metal busbar is embedded within the PCB, the heat dissipation pins are soldered to the metal busbar, and the driver pins and functional pins are soldered to the PCB. This technical solution addresses the issues of traditional power device installation, such as high heat generation, bulk, difficult processing, and susceptibility to damage from mechanical stress and temperature shock.

[0004] Although the power device connection structure disclosed in the above patent document can facilitate heat dissipation during use, it is inconvenient to accurately position and install the power device during use. In addition, it is also troublesome when the power device needs to be disassembled and replaced. Utility Model Content

[0005] The utility model provides a power device connection structure for solving the technical problems of the existing power device connection structure being difficult to position when installing the power device and being difficult to disassemble when the power device needs to be replaced after long-term use.

[0006] In order to solve the above technical problems, the present utility model provides the following technical solutions: a power device connection structure, including a PCB board;

[0007] A metal plate is fixed on the front of the PCB board, and a heat sink connecting plate and a heat sink are fixed on both ends of the metal plate;

[0008] The metal plate is provided with a connecting mechanism on its side, and the connecting mechanism includes a connecting groove, a connecting seat and a fixing bolt;

[0009] The connection groove is opened on the side of the metal plate, the connection seat is fixedly connected to the power device body, the connection seat can be placed in the connection groove, and the fixing bolt can pass through the connection seat and be connected to the bottom of the metal plate through a thread.

[0010] Furthermore, the shape of the connecting seat is smaller at the top and larger at the bottom, that is, the top cross-sectional area of the connecting seat is smaller than the bottom cross-sectional area of the connecting seat when viewed from above.

[0011] Furthermore, a mutually cooperating positioning mechanism is provided between the connecting seat and the connecting groove; the positioning mechanism includes a positioning groove and a positioning shaft, the positioning groove is opened on the side of the connecting seat, and the positioning shaft is fixed on the metal plate side wall of the connecting groove (or, the positioning groove is opened on the metal plate side wall of the connecting groove, and the positioning shaft is fixed to the side of the connecting seat).

[0012] Furthermore, the installation and positioning of the power device body is achieved by the mutual cooperation of the coaxial lines between the positioning groove and the positioning shaft.

[0013] Furthermore, the dimensions of the positioning groove and the positioning shaft near the connection groove are larger than those near the bottom of the connection groove, and the dimensions of the positioning groove and the positioning shaft continuously change from the maximum value near the connection groove to the minimum value near the bottom of the connection groove.

[0014] Furthermore, when installing the power device body, first guide the connecting seat into the connecting groove, then guide the positioning shaft into the positioning groove, push the connecting seat into the connecting groove, insert the fixing bolt after it is in place and tighten the fixing bolt.

[0015] The utility model provides a power device connection structure, which has the following advantages:

[0016] By providing a positioning structure, the positioning shaft and the positioning groove are designed to be colinear, and the gradually expanding guide groove is used to achieve automatic centering during installation, reducing manual adjustment time. The diameter of the guide groove is smaller at one end near the positioning groove, forming a "funnel effect", ensuring that the positioning shaft can only be inserted in the correct direction and avoiding reverse installation. This device has the function of facilitating the precise positioning of the power device body during installation, and improves the stability and convenience of the power device connection structure during use;

[0017] By providing a connecting mechanism, through the cooperation of the connecting groove, the connecting seat and the fixing bolt, it can be ensured that the power device body can be quickly and accurately installed on the metal plate to avoid installation deviation or looseness. The connecting seat can slide in the connecting groove, which increases the convenience and flexibility during installation. The fixing bolt passes through the connecting seat and extends to the inside of the metal plate to form a rigid connection, effectively resisting mechanical vibration and temperature shock, and realizing the function of the device to stably connect the power device body to the top of the metal plate, thereby improving the convenience of the power device connection structure when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional three-dimensional structure of the utility model;

[0020] Figure 3 It is a side cross-sectional structural schematic diagram of the utility model;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of the side view section of the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the utility model in a top view.

[0023] Explanation of the reference numerals in the figure: 1. PCB board; 2. Metal plate; 3. Heat sink connecting plate; 4. Connecting mechanism; 41. Connecting groove; 42. Connecting seat; 43. Fixing bolt; 5. Power device body; 6. Positioning mechanism; 61. Positioning groove; 62. Positioning axis. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 The utility model provides a power device connection structure, including a PCB board 1.

[0026] Reference Figure 1-Figure 5 A metal plate 2 is fixed on the front of the PCB board 1, and a heat sink connecting plate 3 and a heat sink are fixed at both ends of the metal plate 2; a connecting mechanism 4 is provided on the side of the metal plate 2, and the connecting mechanism 4 includes a connecting groove 41, a connecting seat 42 and a fixing bolt 43; the connecting groove 41 is opened on the side of the metal plate 2, and the connecting seat 42 is fixedly connected to the power device body 5. The connecting seat 42 can be placed in the connecting groove 41, and the fixing bolt 43 can pass through the connecting seat 42 and be connected to the bottom of the metal plate 2 by a thread.

[0027] A mutually cooperating positioning mechanism 6 is provided between the connecting seat 42 and the connecting groove 41; the positioning mechanism 6 includes a positioning groove 61 and a positioning shaft 62, the positioning groove 61 is opened on the side of the connecting seat 42, and the positioning shaft 62 is fixed on the metal plate side wall of the connecting groove 41; the installation and positioning of the power device body 5 is achieved by the mutual cooperation of the coaxial lines between the positioning groove 61 and the positioning shaft 62 (similar to a "snap-fit connection").

[0028] Alternatively, a mutually cooperating positioning mechanism 6 is provided between the connecting seat 42 and the connecting groove 41; the positioning mechanism 6 includes a positioning groove 61 and a positioning shaft 62, the positioning groove 61 is opened on the metal plate side wall of the connecting groove 41, and the positioning shaft 62 is fixed to the side of the connecting seat 42; the installation and positioning of the power device body 5 is achieved by the mutual cooperation of the coaxial lines between the positioning groove 61 and the positioning shaft 62 (similar to a "snap-fit connection").

[0029] The dimensions of the positioning groove 61 and the positioning shaft 62 near the mouth of the connecting groove 41 are larger than those near the bottom of the connecting groove 41 , and the dimensions of the positioning groove 61 and the positioning shaft 62 change continuously from the maximum value near the mouth of the connecting groove 41 to the minimum value near the bottom of the connecting groove 41 .

[0030] When installing the power device body 5, first guide the connecting seat 42 into the connecting groove 41 and achieve preliminary positioning through sliding fit. Then, guide the positioning shaft 62 into the positioning groove 61, push the connecting seat 42 into the connecting groove 41, and insert the fixing bolt 43 after it is in place. The fixing bolt 43 is fixed through the snap action to ensure the positional accuracy between the power device body 5 and the metal plate 2. Finally, tighten the fixing bolt 43. When the power device needs to be removed, first remove the fixing bolt 43, then push the power device body 5 to slide out of the connecting groove 41, which can be easily and quickly removed.

[0031] Finally, it should be noted that the shape of the connector 42 is smaller at the top and larger at the bottom, i.e., the top cross-sectional area of the connector 42 is smaller than the bottom cross-sectional area of the connector 42 when viewed from above. The purpose of setting the connector 42 to be smaller at the top and larger at the bottom is to avoid obstructing the operator's line of sight and facilitate the installation and removal of power devices.

[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A power device connection structure, comprising a PCB board (1); Its characteristics are: A metal plate (2) is fixed on the front of the PCB board (1), and heat sink connecting plates (3) and heat sink components are fixed at both ends of the metal plate (2); A connecting mechanism (4) is provided on the side of the metal plate (2), and the connecting mechanism (4) comprises a connecting groove (41), a connecting seat (42) and a fixing bolt (43); The connecting groove (41) is opened on the side of the metal plate (2), the connecting seat (42) is fixedly connected to the power device body (5), the connecting seat (42) can be placed in the connecting groove (41), and the fixing bolt (43) can pass through the connecting seat (42) and be connected to the bottom of the metal plate (2) through a thread; The shape of the connecting seat (42) is small at the top and large at the bottom, that is, the top cross-sectional area of the connecting seat (42) is smaller than the bottom cross-sectional area of the connecting seat (42) when viewed from above.

2. A power device connection structure according to claim 1, characterized in that: A mutually cooperating positioning mechanism (6) is provided between the connecting seat (42) and the connecting groove (41); the positioning mechanism (6) comprises a positioning groove (61) and a positioning shaft (62); the positioning groove (61) is provided on a side surface of the connecting seat (42); and the positioning shaft (62) is fixed to a metal plate side wall of the connecting groove (41).

3. The power device connection structure according to claim 1, wherein: A mutually cooperating positioning mechanism (6) is provided between the connecting seat (42) and the connecting groove (41); the positioning mechanism (6) comprises a positioning groove (61) and a positioning shaft (62); the positioning groove (61) is provided on the metal plate side wall of the connecting groove (41); and the positioning shaft (62) is fixed to the side surface of the connecting seat (42).

4. A power device connection structure according to claim 2 or 3, characterized in that: The installation and positioning of the power device body (5) is achieved by the mutual cooperation of the coaxial lines between the positioning groove (61) and the positioning shaft (62).

5. The power device connection structure according to claim 4, characterized in that: The dimensions of the positioning groove (61) and the positioning shaft (62) near the mouth of the connecting groove (41) are larger than those near the bottom of the connecting groove (41), and the dimensions of the positioning groove (61) and the positioning shaft (62) change continuously and gradually from a maximum value near the mouth of the connecting groove (41) to a minimum value near the bottom of the connecting groove (41).

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