Rectifier bridge lock screw fixing device

Abstract

The utility model relates to rectifier bridge technical field, including bottom plate, support strip and apron, apron sets up in support strip and the top surface of fin, middle part is equipped with a plurality of rectifier bridge open -work installation site on the fin, forms the top limit to the rectifier bridge of placing on the fin, makes rectifier bridge be limited in the preset space in the process of locking screw, the torsion of locking screw can not drive rectifier bridge or the rotation of fin simultaneously, the apron and bottom plate rigid connection of apron both ends through limiting hole B and the limiting rod B cooperation of bottom plate is realized, the torsion of locking screw can not drive rectifier bridge or the rotation of fin, the tilt of rectifier bridge because of torsion transmission is avoided completely, ensure that rectifier bridge always keeps level, the installation posture of upright, guarantee the smooth implementation of subsequent assembly action. The whole set of device constructs the standardization installation positioning structure of rectifier bridge and fin through the collaborative design of containing groove, support strip, open -work installation site and limiting component, need not manual repeated calibration rectifier bridge position, greatly reduces the human operation error.

Description

Technical Field

[0001] This utility model relates to the field of rectifier bridge technology, and in particular to a rectifier bridge screw fixing device. Background Technology

[0002] A rectifier bridge is an integrated semiconductor device whose core function is to convert alternating current (AC) to direct current (DC). It achieves unidirectional rectification of the current through the unidirectional conduction characteristics of its internal diodes, and is widely used in power supplies, chargers, motor drives, and other applications requiring AC-DC conversion. Its structure is based on a "diode combination + package," playing a crucial role in power adapters, chargers, LED lights, and other devices to meet the power requirements of downstream circuits. Furthermore, rectifier bridges are also widely used in large industrial equipment, precision medical instruments, power distribution cabinets, elevators, and other industrial fields.

[0003] The maximum allowable junction temperature of a rectifier bridge is limited (approximately 150~175℃). Therefore, during use, the rectifier bridge must be mounted on a heatsink. The heatsink, using a high thermal conductivity metal such as aluminum or copper, rapidly conducts heat from the rectifier bridge housing to the atmosphere, stabilizing the internal PN junction temperature within a safe range (typically ≤120℃) and preventing thermal breakdown at its source. Currently, the rectifier bridge is secured to the heatsink with screws. During the screw-tightening process, the torque of the screws can cause the material to rotate, resulting in the rectifier bridge tilting after tightening, affecting subsequent assembly. Therefore, ensuring the correct mounting position of the rectifier bridge on the heatsink is a crucial technical problem that needs to be solved in this case. Utility Model Content

[0004] To address the above problems, this utility model provides a rectifier bridge screw fixing device that simultaneously lifts the installation posture of multiple rectifier bridges.

[0005] The technical solution of this utility model is: The rectifier bridge locking screw fixing device includes: The bottom plate has a receiving groove on its top surface that is adapted to the heat sink; A support bar is provided on the top surface of the base plate and is adapted to the heat sink; A cover plate is disposed on the top surface of the support bar and the heat sink, and a plurality of rectifier bridge hollow mounting positions are provided in the middle of the cover plate; limiting holes B are provided at both ends of the cover plate, and limiting rods B corresponding to the limiting holes B are provided on the top surface of the bottom plate.

[0006] Specifically, the support bar is fixedly installed on the top surface of the base plate by means of a connector.

[0007] Specifically, the support bar and the base plate are connected by multiple positioning rods A for limiting.

[0008] Specifically, the base plate is provided with multiple positioning rods A; The support bar is provided with multiple limiting holes A corresponding to the positioning rod A.

[0009] Specifically, both ends of the cover plate have an arc-shaped structure.

[0010] Specifically, the rectifier bridge hollow mounting position includes a connected plastic encapsulation mounting area and a pin mounting area.

[0011] Specifically, the top corner of one end of the encapsulation mounting area is chamfered.

[0012] Specifically, the length of the cover plate is greater than the length of the heat sink.

[0013] Specifically, the length of the support strip is less than the length of the cover plate.

[0014] Specifically, a limiting rod C is fixedly connected to the center of the top surface of the support bar; The cover plate is provided with a limiting groove that is adapted to the limiting rod C.

[0015] This utility model features a rectifier bridge hollow mounting position in the center of the cover plate, which provides a top limit for the rectifier bridge placed on the heat sink, confining it within a preset space during screw tightening. Simultaneously, the two ends of the cover plate, through limiting holes B, engage with limiting rods B on the base plate to achieve a rigid connection between the cover plate and the base plate. The torque during screw tightening prevents the rectifier bridge or heat sink from rotating, completely avoiding tilting caused by torque transmission and ensuring the rectifier bridge maintains a horizontal and upright installation posture, guaranteeing smooth subsequent assembly. The entire device, through the coordinated design of the receiving groove, support strip, hollow mounting position, and limiting components, constructs a standardized installation and positioning structure for the rectifier bridge and heat sink. This eliminates the need for repeated manual calibration of the rectifier bridge position, significantly reducing the impact of human error on the installation posture. This improves the consistency and yield rate of rectifier bridge installation, simplifies assembly steps, and shortens assembly time. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram showing the connection between the rectifier bridge and the heat sink after the cover plate is removed. Figure 3 This is a schematic diagram of the three-dimensional structure of the cover plate; In the diagram, 100 is the base plate, 200 is the heat sink, 300 is the support bar, 400 is the cover plate, 410 is the rectifier bridge cutout mounting position, and 420 is the limiting hole B. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "vertical," and "horizontal," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The following is for reference. Figure 1-3 Describe this utility model; like Figure 1 As shown, the rectifier bridge locking screw fixing device includes: The base plate 100 has a receiving groove on its top surface that is adapted to the heat sink 200; A support bar 300 is disposed on the top surface of the base plate 100 and is adapted to the heat sink 200; the length of the support bar 300 is less than the length of the cover plate 400.

[0021] To further improve the stability of the support bar 300, a fixedly connected limiting rod C is provided in the middle of the top surface of the support bar 300; a limiting groove adapted to the limiting rod C is provided on the cover plate 400.

[0022] A cover plate 400 is disposed on the top surface of the support bar 300 and the heat sink 200, and has a plurality of rectifier bridge hollow mounting positions 410 located on the heat sink 200 in its middle. Limiting holes B are respectively provided at both ends of the cover plate 400, and limiting rods B corresponding to the limiting holes B420 are provided on the top surface of the base plate 100. In this design, both ends of the cover plate 400 are arc-shaped, and the length of the cover plate 400 is greater than the length of the heat sink 200, facilitating direct upward extraction of the cover plate 400 and improving the rectifier bridge installation efficiency.

[0023] The support bar 300 in this case can be adapted to the height of the heat sink. The support bar 300 can be set in the following ways: Method 1: The support bar 300 is fixedly installed on the top surface of the base plate 100 through the connector.

[0024] Method 2: The support bar 300 and the base plate 100 are connected by multiple positioning rods A for limiting.

[0025] Specifically, the base plate 100 is provided with multiple positioning rods A; The support bar 300 is provided with multiple limiting holes A corresponding to the positioning rod A.

[0026] like Figure 3 As shown, the rectifier bridge hollow mounting position 410 includes a connected plastic package mounting area and a pin mounting area. One end of the plastic package mounting area has a chamfer at the top corner, which effectively prevents the rectifier bridge from being misplaced.

[0027] The cover plate 400 of this utility model has a rectifier bridge hollow mounting position 410 in the middle, which can form a top limit for the rectifier bridge placed on the heat sink 200, so that the rectifier bridge is confined within the preset space during the screw tightening process; at the same time, the two ends of the cover plate 400 cooperate with the limit rod B of the base plate through the limit hole B to realize the rigid connection between the cover plate 400 and the base plate 100. The torque during screw tightening cannot drive the rectifier bridge or heat sink to rotate, completely avoiding the tilting of the rectifier bridge caused by torque transmission, ensuring that the rectifier bridge always maintains a horizontal and upright installation posture, and ensuring the smooth implementation of subsequent assembly operations.

[0028] Regarding the information disclosed in this case, the following points need to be clarified: (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can refer to the general design. (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments; The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. A rectifier bridge locking screw fixing device, characterized in that, include: The base plate (100) has a receiving groove on its top surface that is adapted to the heat sink (200); A support bar (300) is provided on the top surface of the base plate (100) and is adapted to the heat sink (200); A cover plate (400) is disposed on the top surface of the support bar (300) and the heat sink (200), and a plurality of rectifier bridge hollow mounting positions (410) located on the heat sink (200) are provided in the middle; the two ends of the cover plate (400) are respectively provided with limiting holes B (420), and the top surface of the base plate (100) is provided with limiting rods B corresponding to the limiting holes B (420).

2. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The support bar (300) is fixedly installed on the top surface of the base plate (100) by means of a connector.

3. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The support bar (300) and the base plate (100) are connected by multiple positioning rods A for limiting.

4. The rectifier bridge locking screw fixing device according to claim 3, characterized in that, The base plate (100) is provided with a plurality of positioning rods A; The support bar (300) is provided with a plurality of limiting holes A corresponding to the positioning rod A.

5. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The two ends of the cover plate (400) are respectively arc-shaped.

6. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The rectifier bridge cutout mounting position (410) includes a connected encapsulation mounting area and a pin mounting area.

7. The rectifier bridge locking screw fixing device according to claim 6, characterized in that, The top corner of the encapsulation installation area is chamfered.

8. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The length of the cover plate (400) is greater than the length of the heat sink (200).

9. The rectifier bridge locking screw fixing device according to claim 1 or 8, characterized in that, The length of the support bar (300) is less than the length of the cover plate (400).

10. The rectifier bridge locking screw fixing device according to claim 1, characterized in that, The support bar (300) has a fixedly connected limiting rod C at the center of its top surface; The cover plate (400) is provided with a limiting groove that is adapted to the limiting rod C.

Images