A connecting mechanism of a rectifier bridge and a heat sink

Abstract

The utility model relates to rectifier bridge and the connecting mechanism technical field of radiator, specifically is a rectifier bridge and the connecting mechanism of radiator, the heat dissipation base of radiator horizontal arrangement and the mounting seat of vertical convex in heat dissipation base upper surface, the mounting hole of being offered with through is opened to mounting seat along vertical direction, the bottom integral moulding of rectifier bridge has fixed base, fixed base is stacked in the upper surface of mounting seat and is correspondingly arranged with mounting seat, the heat conduction gasket is clamped between the lower surface of rectifier bridge and the upper surface of heat dissipation base, and is located the outside of mounting seat, the connecting assembly includes bolt and nut, the screw rod of bolt passes through mounting hole and fixed base in proper order, the nut is screwed with the screw rod of bolt and is pressed tightly the upper surface of fixed base, to rectifier bridge is fixed in radiator, rectifier bridge and heat conduction gasket still are provided with heat conduction silicone grease, and heat conduction silicone grease is filled between the lower surface of rectifier bridge and the upper surface of heat conduction gasket in even coating shape.

Description

Technical Field

[0001] This utility model relates to the technical field of connection mechanism between rectifier bridge and heat sink, specifically a connection mechanism between rectifier bridge and heat sink. Background Technology

[0002] As a key component in power electronic equipment, the rectifier bridge generates a significant amount of heat during operation. Its connection structure with the heat sink directly impacts heat dissipation efficiency and equipment stability. Traditional connection methods often suffer from poorly designed thermal interfaces leading to obstructed heat conduction, or assembly deviations due to inaccurate positioning of the installation structure, thus affecting heat transfer. Furthermore, fixing methods often rely on a single connector, which is susceptible to loosening due to vibration over time, resulting in poor contact or localized overheating. In addition, insufficient contact area between the heat sink and the rectifier bridge, and a lack of optimized heat dissipation component layout, can also cause heat accumulation, reducing equipment reliability. These problems collectively lead to the shortcomings of traditional connection mechanisms in practical applications, including low heat dissipation efficiency, complex installation, and poor structural stability, making it difficult to meet the dual requirements of high-power equipment for both heat dissipation and mechanical performance. Utility Model Content

[0003] The purpose of this invention is to provide a connection mechanism between a rectifier bridge and a heat sink to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A connection mechanism between a rectifier bridge and a heat sink, comprising: A radiator, a horizontally arranged heat dissipation base and a vertically protruding mounting seat on the upper surface of the heat dissipation base, wherein the mounting seat has a through mounting hole in the vertical direction. The rectifier bridge has an integrally formed base at its bottom, which is stacked on the upper surface of the mounting base and is correspondingly arranged with the mounting base. A thermal pad is sandwiched between the lower surface of the rectifier bridge and the upper surface of the heat sink base, and is located on the outside of the mounting base; The connecting assembly includes a bolt and a nut, wherein the bolt's shank passes sequentially through a mounting hole and a fixing seat, and the nut is threadedly connected to the bolt's shank and presses against the upper surface of the fixing seat to fix the rectifier bridge to the heat sink.

[0005] Furthermore, thermal grease is provided between the rectifier bridge and the thermal pad. The thermal grease is uniformly coated and filled between the lower surface of the rectifier bridge and the upper surface of the thermal pad, and the lower surface of the thermal pad is in close contact with the upper surface of the heat sink base.

[0006] Furthermore, there are two mounting bases, symmetrically distributed on the left and right sides of the upper surface of the heat dissipation base, and each mounting base has two spaced mounting holes; there are two fixing bases corresponding one-to-one with the mounting bases, and each fixing base has a through hole coaxial with the mounting hole, and the number of bolts is the same as the number of mounting holes.

[0007] Furthermore, the connecting assembly also includes a circular washer, which is fitted onto the bolt thread and located between the nut and the upper surface of the fixing seat. The diameter of the circular washer is larger than the diameter of the through hole on the fixing seat.

[0008] Furthermore, the radiator also includes multiple heat sinks, which are vertically arranged sheet-like structures, vertically connected to the lower surface of the heat sink base, and arranged at equal intervals along the length of the heat sink base, forming a heat dissipation airflow channel between adjacent heat sinks.

[0009] Furthermore, the lower surface of the fixing seat is provided with a downwardly recessed positioning groove, the shape of the positioning groove matches the top shape of the mounting seat, the upper end of the mounting seat is embedded in the positioning groove, and the inner wall of the positioning groove is in clearance fit with the outer wall of the mounting seat.

[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. By optimizing the heat conduction path design, a composite structure of thermal pads and thermal grease is placed between the rectifier bridge and the heat sink to ensure efficient heat transfer from the rectifier bridge to the heat sink and avoid localized heat accumulation. The positioning groove design of the mounting bracket and the fixing bracket enables precise alignment of the rectifier bridge and the heat sink, simplifying the assembly process and improving installation consistency.

[0011] 2. Multiple sets of symmetrically distributed bolts, combined with circular washers, not only enhance the overall structural rigidity but also distribute pressure to prevent component deformation and effectively resist the risk of loosening caused by vibration. The heat sink fins at the bottom of the radiator are arranged in an orderly manner to form a natural airflow channel. Combined with the large-area contact between the heat sink base and the rectifier bridge, this further improves heat dissipation efficiency. The overall structure balances thermal conductivity and mechanical stability, solving problems such as insufficient heat dissipation, complex installation, and unreliable fixing in traditional connection methods, providing a reliable guarantee for the long-term stable operation of the equipment. Attached Figure Description

[0012] Figure 1 This is a side view of the structure of this utility model; Figure 2 This is a schematic diagram of the front structure of this utility model; Figure 3 This is a schematic diagram of the bottom structure of this utility model; Figure 4 This is a schematic diagram of the bolt structure of this utility model; In the picture: 100. Heat sink; 110. Heat sink base; 120. Mounting bracket; 130. Mounting hole; 140. Heat sink fin; 200. Rectifier bridge; 210. Thermal pad; 220. Thermal grease; 230. Diode; 240. Mounting bracket; 300, hex bolt; 320, washer; 330, hex nut. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example 1, please refer to Figures 1-4 In this embodiment of the utility model, a connection mechanism between a rectifier bridge and a heat sink is provided. The heat sink 100 includes a horizontally arranged heat sink base 110 and a vertically protruding mounting base 120 on the upper surface of the heat sink base 110. The mounting base 120 has a through mounting hole 130 in the vertical direction. The bottom of the rectifier bridge 200 is integrally formed with a fixing base 240. The fixing base 240 is stacked on the upper surface of the mounting base 120 and is correspondingly arranged with the mounting base 120.

[0015] In this embodiment, the thermal pad 210 is sandwiched between the lower surface of the rectifier bridge 200 and the upper surface of the heat sink 110, and is located outside the mounting base 120. Thermal grease 220 is also provided between the rectifier bridge 200 and the thermal pad 210. The thermal grease 220 is uniformly coated and filled between the lower surface of the rectifier bridge 200 and the upper surface of the thermal pad 210.

[0016] like Figure 1 and Figure 3 As shown, in this embodiment, the radiator 100 also includes a plurality of heat sinks 140. The heat sinks 140 are vertically arranged sheet-like structures, vertically connected to the lower surface of the heat sink base 110, and are arranged at equal intervals along the length direction of the heat sink base 110, forming a heat dissipation air duct between adjacent heat sinks 140.

[0017] In this embodiment, there are two mounting bases 120, which are symmetrically distributed on the left and right sides of the upper surface of the heat dissipation base 110. Each mounting base 120 has two spaced mounting holes 130. There are two fixing bases 240 that correspond one-to-one with the mounting bases 120. Each fixing base 240 has a through hole that is coaxial with the mounting holes 130.

[0018] like Figure 2 As shown, in this embodiment, the connecting assembly includes a bolt 300, a nut 330, and a circular washer 320. The bolt 300's thread passes through the mounting hole 130 and the fixing seat 240 in sequence. The circular washer 320 is sleeved on the bolt 300's thread and is located between the nut 330 and the upper surface of the fixing seat 240. The nut 330 is threadedly connected to the bolt 300's thread and presses the circular washer 320.

[0019] like Figure 1 As shown, in this embodiment, the lower surface of the thermal pad 210 is in close contact with the upper surface of the heat sink 110, and a continuous thermal interface is formed between the thermal grease 220 and the lower surface of the rectifier bridge 200.

[0020] like Figure 1 and Figure 2 As shown, in this embodiment, the number of bolts 300 is the same as the number of mounting holes 130, with each mounting hole 130 corresponding to one bolt 300. The rectifier bridge 200 is balanced and fixed by two sets of symmetrically distributed mounting seats 120 and fixing seats 240.

[0021] like Figure 2 As shown, in this embodiment, the lower surface of the fixing seat 240 is provided with a downwardly recessed positioning groove. The shape of the positioning groove matches the top shape of the mounting seat 120. The upper end of the mounting seat 120 is embedded in the positioning groove, and the inner wall of the positioning groove is in clearance fit with the outer wall of the mounting seat 120.

[0022] like Figure 4 As shown, in this embodiment, the diameter of the circular gasket 320 is larger than the diameter of the through hole on the fixing seat 240, thereby increasing the contact area and preventing the nut 330 from causing indentations on the upper surface of the fixing seat 240.

[0023] like Figures 1-3 As shown, in this embodiment, the height of the heat sink 140 is adapted to the length of the heat sink base 110, and the spacing between adjacent heat sinks 140 is uniform, ensuring that air convection is formed in the heat dissipation duct.

[0024] In this embodiment, the lower surface of the rectifier bridge 200 is arranged parallel to the upper surface of the heat sink base 110. The thermal pad 210 undergoes a slight deformation due to the clamping force of the connecting components, filling the micro gaps in the contact surface.

[0025] like Figure 2 and Figure 4 As shown, in this embodiment, the length of the bolt 300 is greater than the sum of the thicknesses of the mounting hole 130 and the fixing seat 240, and the end of the bolt does not protrude from the upper surface of the nut 330 after the nut 330 is tightened.

[0026] Beneficial effects: In this embodiment, the fitting structure of the positioning groove and the mounting base 120 achieves precise alignment between the rectifier bridge 200 and the heat sink 100, avoiding assembly deviations that could affect the heat conduction effect; the composite design of the thermal pad 210 and the thermal grease 220 improves the interface heat conduction efficiency, and the three-dimensional heat dissipation structure formed by the heat sink base 110 and the heat sink 140 accelerates the diffusion of heat from the rectifier bridge 200 to the external environment; the combination of symmetrically distributed bolts 300 and circular washers 320 enhances connection stability, disperses vibration stress and prevents loosening after long-term use, and the gap fit of the positioning groove allows the components to undergo slight thermal expansion displacement when the temperature changes, avoiding structural stress concentration, and improving the overall reliability and service life of the connection mechanism.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A connection mechanism between a rectifier bridge and a heat sink, characterized in that, include: The radiator (100) has a horizontally arranged heat dissipation base (110) and a vertically protruding mounting seat (120) on the upper surface of the heat dissipation base (110). The mounting seat (120) has a through mounting hole (130) in the vertical direction. A rectifier bridge (200) has a fixed base (240) integrally formed at its bottom. The fixed base (240) is stacked on the upper surface of the mounting base (120) and is correspondingly arranged with the mounting base (120). A thermal pad (210) is sandwiched between the lower surface of the rectifier bridge (200) and the upper surface of the heat sink base (110), and is located on the outside of the mounting base (120); The connecting assembly includes a bolt (300) and a nut (330), the bolt (300) having its thread passing through a mounting hole (130) and a fixing seat (240) in sequence, and the nut (330) being threadedly connected to the thread of the bolt (300) and pressing against the upper surface of the fixing seat (240) to fix the rectifier bridge (200) to the radiator (100).

2. The connection mechanism between the rectifier bridge and the heat sink according to claim 1, characterized in that, Thermal grease (220) is also provided between the rectifier bridge (200) and the thermal pad (210). The thermal grease (220) is uniformly coated and filled between the lower surface of the rectifier bridge (200) and the upper surface of the thermal pad (210). The lower surface of the thermal pad (210) is in close contact with the upper surface of the heat sink base (110).

3. The connection mechanism between the rectifier bridge and the heat sink according to claim 1, characterized in that, There are two mounting bases (120), which are symmetrically distributed on the left and right sides of the upper surface of the heat dissipation base (110). Each mounting base (120) has two spaced mounting holes (130). There are two fixing bases (240) that correspond one-to-one with the mounting bases (120). Each fixing base (240) has a through hole that is coaxial with the mounting hole (130). The number of bolts (300) is the same as the number of mounting holes (130).

4. The connection mechanism between the rectifier bridge and the heat sink according to claim 1, characterized in that, The connecting assembly also includes a circular washer (320), which is fitted onto the thread of the bolt (300) and located between the nut (330) and the upper surface of the fixing seat (240). The diameter of the circular washer (320) is larger than the diameter of the through hole on the fixing seat (240).

5. The connection mechanism between the rectifier bridge and the heat sink according to claim 1, characterized in that, The radiator (100) also includes a plurality of heat sinks (140), which are vertically arranged sheet-like structures, vertically connected to the lower surface of the heat sink base (110), and are arranged at equal intervals along the length of the heat sink base (110), forming a heat dissipation air duct between adjacent heat sinks (140).

6. The connection mechanism between the rectifier bridge and the heat sink according to claim 1, characterized in that, The lower surface of the fixed seat (240) is provided with a downwardly recessed positioning groove. The shape of the positioning groove matches the top shape of the mounting seat (120). The upper end of the mounting seat (120) is embedded in the positioning groove, and the inner wall of the positioning groove is in clearance fit with the outer wall of the mounting seat (120).

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