Efficient diode rectifier bridge

Abstract

The invention discloses a high-efficiency diode rectifier bridge, which belongs to the field of diodes, and comprises a rectifier bridge shell and a diode extending from the inside of the rectifier bridge shell, the top of the rectifier bridge shell is open, and a bottom plate of the rectifier bridge shell is provided with uniformly distributed heat dissipation holes I; a sliding frame body is arranged at an opening in the top of the rectifier bridge shell, a limiting control assembly is arranged between the sliding frame body and the rectifier bridge shell, a heat dissipation plate is arranged in the sliding frame body, and second heat dissipation holes distributed at intervals are formed in the heat dissipation plate; and the heat dissipation holes I in the rectifier bridge shell and the heat dissipation holes II in the heat dissipation plate are distributed in a staggered manner. The diode rectifier bridge can be effectively cooled, so that the influence of poor heat dissipation on the performance of the diode rectifier bridge is effectively avoided.

Description

Technical Field

[0001] The invention relates to the field of diodes, in particular to a high-efficiency diode rectifier bridge. Background Art

[0002] The diode rectifier bridge is a common electronic component, which is mainly used to convert alternating current (AC) into direct current (DC). It is composed of four diodes connected in a bridge manner, with two input ends and two output ends. These four diodes are usually encapsulated in a shell to form a full-bridge structure.

[0003] In each operation cycle of the rectifier bridge, only two diodes are working at the same time. Through the unidirectional conduction function of the diode, the AC power is converted into a unidirectional DC pulsating voltage. Therefore, the diode rectifier bridge has a wide range of applications in many fields. It can be used as a power adapter: converting AC power into DC power to power various electronic devices. Switching power supply: converting AC power into DC power, and then adjusting and stabilizing the voltage through high-frequency switches and transformers. Battery charger: converting AC power into DC power, and then charging the battery, etc.

[0004] When the diode rectifier bridge is working, a large amount of heat will be generated. If the heat cannot be dissipated in time, the diode temperature will be too high and it will lose its normal working state, which will have an adverse effect on the entire circuit. Specifically, the reason why the rectifier bridge heats up is mainly because the diode inside it will generate heat when current passes through it, especially in the case of high power output, more heat is generated. If the heat dissipation is poor, the heat will accumulate, causing the temperature of the rectifier bridge to rise, thereby affecting its performance and life. Summary of the invention

[0005] The purpose of the present invention is to provide a high-efficiency diode rectifier bridge, which effectively solves the problem that heat accumulation occurs in the existing diode rectifier bridge under high power output, thereby causing the temperature of the rectifier bridge to rise and affecting its performance.

[0006] The technical solution of the present invention is as follows:

[0007] A high-efficiency diode rectifier bridge comprises a rectifier bridge housing and a diode extending from the rectifier bridge housing, the rectifier bridge housing has an opening at the top, a bottom plate of the rectifier bridge housing is provided with uniformly distributed heat dissipation holes 1, a sliding frame is provided at the top opening of the rectifier bridge housing, a limit control component is provided between the sliding frame and the rectifier bridge housing, a heat dissipation plate is provided inside the sliding frame, the heat dissipation plate is provided with spaced heat dissipation holes 2, and the heat dissipation holes 1 on the rectifier bridge housing and the heat dissipation holes 2 on the heat dissipation plate are staggered.

[0008] Preferably, the number of the diodes is four, and the four diodes are connected in a specific manner to form a "bridge" structure.

[0009] Preferably, baffles 1 are provided on both sides of the rectifier bridge housing, and the height of the baffles 1 is greater than the height of the rectifier bridge housing. Mounting plates are provided on the back sides of the two baffles 1 and near the bottom. Mounting holes are provided on the mounting plates, and the cross-section of the mounting holes is waist-shaped. Mounting screws are provided in the mounting holes on both sides and the number of the mounting screws on one side is not less than two.

[0010] Preferably, limiting grooves are provided downwardly on both sides of the top of the rectifier bridge housing, one end of the limiting groove is open, the vertical cross-section of the limiting groove is arc-shaped, and the arc is a minor arc, and threaded matching holes are symmetrically provided on the front end face of the rectifier bridge housing and directly below the end face of the limiting groove.

[0011] Preferably, a second baffle is provided on the top of the rectifier bridge housing, and the second baffle is arranged on the side of the limiting groove away from the inlet, and a sealing plate is provided on the side surface of the second baffle close to the inlet of the limiting groove, and the sealing plate is made of elastic material.

[0012] Preferably, spherical clamping holes are provided at intervals on both sides of the bottom of the sliding frame, and a mating ball with a rolling connection is provided in the spherical clamping hole. The internal surface area of ​​the spherical clamping hole is not less than one half of the surface area of ​​the mating ball, and the area of ​​the mating ball extending out of the spherical clamping hole cooperates with the limiting groove.

[0013] Preferably, the limit control assembly includes a pressure strip, a positioning ring, a rotating shaft, a positioning plate and a fastening screw. The pressure strip is fixedly connected to the side of the baffle 2 away from the diode and on the top of the sealing plate. The cross-section of the pressure strip is concave, and the notch of the pressure strip faces the entrance of the limit groove. The positioning ring is symmetrically connected to the concave sides of the pressure strip, and the rotating shaft is rotatably connected to the inside of the positioning ring.

[0014] Preferably, when the sliding frame enters the limiting groove, the sliding frame and the pressure plate are movably fitted together, and the positioning plate is fixedly connected to the outer circular wall of the rotating shaft. When the positioning plate is rotated until the sliding frame fits together, the fastening screw passes through the positioning plate and is locked in the threaded fitting hole.

[0015] Preferably, the heat sink is made of elastic plastic material, and a card plate group is provided on the opposite inner surfaces of the sliding frame. There are two card plate groups on the same side, and a card slot is provided between the two card plates. Both ends of the heat sink are movably inserted into the card slot.

[0016] Preferably, a movably connected sleeve is provided on the diode, the length of the sleeve is greater than the length of the diode extending out of the rectifier bridge housing, a sponge layer is provided inside the sleeve, the vertical cross-section of the sponge layer is arc-shaped, and when the sleeve is inserted into the diode, the sponge layer wraps the diode.

[0017] The advantages of the present invention are:

[0018] 1. The present invention provides a heat dissipation hole 1 on the bottom plate of the rectifier bridge housing, designs the top of the rectifier bridge housing to be open, installs a slidingly connected heat dissipation plate at the opening, and provides a heat dissipation hole 2 on the heat dissipation plate. When the rectifier bridge outputs high power, the generated heat will be dissipated through the heat dissipation hole 1 and the heat dissipation hole 2, thereby effectively avoiding heat accumulation and improving the efficiency of the rectifier bridge under high power output conditions;

[0019] Moreover, the present invention designs the heat dissipation hole 1 and the heat dissipation hole 2 to be arranged in a staggered manner, so that when there is wind outside, the cold air can better take away the heat inside the rectifier bridge after passing through the heat dissipation hole 1 and the heat dissipation hole 2, thereby improving the cooling efficiency.

[0020] 2. The present invention can design the sliding frame and the rectifier bridge housing into a standard module form, and design the top of the rectifier bridge housing to be open, so that the diode can be better installed. The sliding frame and the rectifier bridge housing are designed to be separate, which is more convenient for repairing the diode rectifier bridge. When a fault occurs, the sliding frame can be easily disassembled. This design not only improves the maintainability of the rectifier bridge, but also helps to achieve large-scale production and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the integral rectifier bridge component of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the integral rectifier bridge component and the sleeve and other components of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the rectifier bridge housing of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the sliding frame and the limit control component of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the sliding frame and the card plate and other components of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of components such as a sliding frame and a pressure strip of the present invention.

[0027] Figure numerals: 1. rectifier bridge housing; 2. diode; 3. heat dissipation hole 1; 4. sliding frame; 5. heat dissipation plate; 6. heat dissipation hole 2; 7. baffle 1; 8. mounting plate; 9. mounting hole; 10. mounting screw; 11. limiting groove; 12. threaded matching hole; 13. baffle 2; 14. sealing plate; 15. spherical clamping hole; 16. matching ball; 17. pressure strip; 18. positioning ring; 19. rotating shaft; 20. positioning plate; 21. fastening screw; 22. clamping plate; 23. clamping groove; 24. sleeve; 25. sponge layer. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] like Figure 1 , 2 As shown, the present invention provides a high-efficiency diode rectifier bridge, which includes a rectifier bridge housing 1 and a diode 2 extending from the inside of the rectifier bridge housing 1, the top of the rectifier bridge housing 1 is open, and the bottom plate of the rectifier bridge housing 1 is provided with evenly distributed heat dissipation holes 3, a sliding frame 4 is provided at the top opening of the rectifier bridge housing 1, a limit control component is provided between the sliding frame 4 and the rectifier bridge housing 1, a heat dissipation plate 5 is provided inside the sliding frame 4, and the heat dissipation plate 5 is provided with spaced heat dissipation holes 6, and the heat dissipation holes 3 on the rectifier bridge housing 1 and the heat dissipation holes 6 on the heat dissipation plate 5 are staggered.

[0030] It should be noted that, by providing a heat dissipation hole 1 3 on the bottom plate of the rectifier bridge housing 1, the top of the rectifier bridge housing 1 is designed to be open, and a heat dissipation plate 5 that is slidably connected is installed at the opening, and a heat dissipation hole 2 6 is provided on the heat dissipation plate 5. When the rectifier bridge is in the case of high-power output, the generated heat will be dissipated through the heat dissipation hole 1 3 and the heat dissipation hole 2 6, thereby effectively avoiding the situation of heat accumulation and improving the efficiency of the rectifier bridge in the case of high-power output;

[0031] Moreover, the present invention designs the heat dissipation holes 1 3 and the heat dissipation holes 2 6 to be arranged in a staggered manner, so that when there is wind outside, the cold wind can better take away the heat inside the rectifier bridge after passing through the heat dissipation holes 1 3 and the heat dissipation holes 2 6, thereby improving the cooling efficiency.

[0032] In this example, there are four diodes 2 , which are connected in a specific manner to form a “bridge” structure.

[0033] It should be noted that the rectifier bridge is divided into two structures: full bridge and half bridge. The full bridge is a form in which four rectifier diodes 2 are connected into a bridge circuit. The present invention adopts the form of a full bridge. In the full bridge rectifier circuit, four diodes 2 (usually marked as D1, D2, D3, D4) are connected into a bridge circuit, and the cathode of each diode 2 is connected to the anode of the adjacent diode 2 to form a closed loop.

[0034] When AC power is input to the rectifier bridge, if the input voltage is in the positive half cycle, that is, the positive voltage of the power supply is higher than the negative voltage, then diodes 2D1 and D3 are turned on, while D2 and D4 are turned off. The current flows from the positive pole of the power supply through D1, through the load (such as resistance, capacitor, etc.), and then through D3 back to the negative pole of the power supply. In this way, the positive pole of the DC voltage is connected to the positive pole of the load, and the negative pole is connected to the negative pole of the load, thereby generating a forward voltage on the load;

[0035] When the AC input voltage is in the negative half cycle, that is, the negative voltage of the power supply is higher than the positive voltage, then diodes 2D2 and D4 are turned on, while D1 and D3 are turned off. The current flows from the negative pole of the power supply through D2, through the load, and then through D4 back to the positive pole of the power supply. Similarly, the positive pole of the DC voltage is still connected to the positive pole of the load, and the negative pole is still connected to the negative pole of the load. In this way, no matter which half cycle of the AC power, the load can get a stable DC voltage.

[0036] The above is the overall working principle of the diode 2 rectifier bridge being energized, which is the prior art and will not be elaborated in detail here.

[0037] like Figure 2 As shown, in this example, baffles 7 are provided on both sides of the rectifier bridge housing 1, and the height of the baffles 7 is greater than the height of the rectifier bridge housing 1. Mounting plates 8 are provided on the back side and near the bottom of the two baffles 7. Mounting holes 9 are provided on the mounting plates 8. The cross-section of the mounting holes 9 is waist-shaped. Mounting screws 10 are provided in the mounting holes 9 on both sides, and the number of mounting screws 10 on one side is not less than two.

[0038] It should be noted that, by designing the height of the baffle 1 7 to be greater than the height of the rectifier bridge housing 1, when the sliding frame 4 is matched with the rectifier bridge housing 1, the baffles 1 7 on the left and right sides can limit the sliding frame 4, thereby preventing the sliding frame 4 from shaking left and right;

[0039] At the same time, mounting holes 9 are arranged on the mounting plates 8 on both sides of the rectifier bridge housing 1, and mounting screws 10 are arranged in the mounting holes 9. The mounting screws 10 can slide in the mounting holes 9, so that when the rectifier bridge housing 1 is installed, the installation position of the rectifier bridge housing 1 can be flexibly adjusted, thereby improving the flexibility of installation.

[0040] like Figure 3As shown, in this example, limiting grooves 11 are downwardly opened on both sides of the top of the rectifier bridge housing 1, one end of the limiting groove 11 is open, the vertical cross-section of the limiting groove 11 is arc-shaped, and the arc is a minor arc, and the front end face of the rectifier bridge housing 1 and directly below the end face of the limiting groove 11 are symmetrically provided with threaded matching holes 12.

[0041] It should be noted that the limiting groove 11 and the mating ball 16 cooperate with each other, so that the mating ball 16 can better slide in the limiting groove 11. Through the set threaded mating hole 12, when the sliding frame 4 is fully entered and cooperates with the rectifier bridge housing 1, the positioning plate 20 is rotated to fit on the rectifier bridge housing 1, and the fastening screw 21 will be locked in the threaded mating hole 12, thereby achieving the limitation of the sliding frame 4 and restricting the sliding frame 4 to prevent the sliding frame 4 from falling out of the rectifier bridge housing 1.

[0042] like Figure 4 As shown, in this example, a baffle plate 13 is provided on the top of the rectifier bridge housing 1, and the baffle plate 13 is arranged on the side direction of the limiting groove 11 away from the inlet, and a sealing plate 14 is provided on the side surface of the baffle plate 13 close to the inlet of the limiting groove 11, and the sealing plate 14 is made of elastic material.

[0043] It should be noted that, by setting the baffle plate 2 13, the sliding frame 4 can be limited by the baffle plate 2 13 when it cooperates with the rectifier bridge housing 1, thereby avoiding sliding out. The sealing plate 14 is designed to be made of elastic material, so that the sliding frame 4 can continue to be pushed when it slides into contact with the sealing plate 14. The sealing plate 14 has a certain degree of elasticity, which facilitates the positioning plate 20 to be completely fitted with the rectifier bridge housing 1, improves the sealing between the sliding frame 4 and the rectifier bridge housing 1, and further enhances the firmness.

[0044] like Figure 5 As shown, in this example, spherical clamping holes 15 are provided at intervals on both sides of the bottom of the sliding frame 4, and a rolling-connected mating ball 16 is provided in the spherical clamping hole 15. The internal surface area of ​​the spherical clamping hole 15 is not less than half of the surface area of ​​the mating ball 16, and the area of ​​the mating ball 16 extending out of the spherical clamping hole 15 cooperates with the limiting groove 11.

[0045] It should be noted that the matching ball 16 is rotatably distributed in the spherical clamping hole 15, and can rotate in the spherical clamping hole 15, but will not fall out from the inside. When the sliding frame 4 is matched with the rectifier bridge housing 1, the matching ball 16 rolls in the limiting groove 11, so that the sliding frame 4 can more easily cover the top opening of the rectifier bridge housing 1;

[0046] At the same time, the sliding frame 4 and the rectifier bridge housing 1 can be designed into a standard module form. The top of the rectifier bridge housing 1 is designed to be open, so that the diode 2 can be better installed. The sliding frame 4 and the rectifier bridge housing 1 are designed to be separate, which is more convenient for repairing the diode 2 rectifier bridge. When a fault occurs, the sliding frame 4 can be easily disassembled. This design not only improves the maintainability of the rectifier bridge, but also helps to achieve large-scale production and reduce costs.

[0047] like Figure 6 As shown, in this example, the limit control assembly includes a pressure strip 17, a positioning ring 18, a rotating shaft 19, a positioning plate 20 and a fastening screw 21. The pressure strip 17 is fixedly connected to the side of the baffle 13 away from the diode 2 and at the top of the sealing plate 14. The cross-section of the pressure strip 17 is concave, and the notch of the pressure strip 17 faces the entrance of the limit groove 11. The positioning ring 18 is symmetrically connected to the two sides of the concave shape of the pressure strip 17, and the rotating shaft 19 is rotatably connected to the inside of the positioning ring 18.

[0048] In this example, when the sliding frame 4 enters the limiting groove 11, the sliding frame 4 and the pressure plate are movably fitted together, and the positioning plate 20 is fixedly connected to the outer circular wall of the rotating shaft 19. When the positioning plate 20 is rotated until the sliding frame 4 fits together, the fastening screw 21 passes through the positioning plate 20 and is locked in the threaded matching hole 12.

[0049] It should be noted that, by setting a limit control component, when the sliding frame 4 is matched with the rectifier bridge housing 1, the designed limit control component can limit the sliding frame 4, thereby effectively avoiding displacement. At the same time, by fastening the screws 21, easy disassembly can be achieved, making it convenient to disassemble the sliding frame 4.

[0050] In this example, the heat sink 5 is made of elastic plastic material, and a group of card plates 22 are provided on the opposite inner surfaces of the sliding frame 4. There are two groups of card plates 22 on the same side, and a card slot 23 is provided between the two card plates 22. The two ends of the heat sink 5 are movably inserted into the card slot 23.

[0051] It should be noted that, by setting the card plate 22, a card slot 23 is formed between the two card plates 22, and the heat sink 5 is clamped between the two card slots 23, thereby ensuring the stability of the heat sink 5. At the same time, the heat sink 5 is made of elastic plastic material, so when a certain force is applied to the heat sink 5, it will be deformed, so that the heat sink 5 can be removed, so that after long-term work, it can be removed to remove dust.

[0052] Preferably, a movably connected sleeve 24 is provided on the diode 2, the length of the sleeve 24 is greater than the length of the diode 2 extending out of the rectifier bridge housing 1, and a sponge layer 25 is provided inside the sleeve 24, and the vertical cross-section of the sponge layer 25 is arc-shaped. When the sleeve 24 is inserted into the diode 2, the sponge layer 25 wraps the diode 2.

[0053] It should be noted that, by providing an external sleeve 24 on the diode 2, there is a sponge layer 25 inside the sleeve 24. When the diode 2 rectifier bridge is no longer needed, the sleeve 24 can be put on the diode 2, and the internal sponge layer 25 fits with the diode 2, thereby effectively protecting the diode 2, avoiding it from external damage, and improving its safety protection.

[0054] Detailed usage and effects of the above embodiments:

[0055] When it is necessary to dissipate heat for the diode 2 rectifier bridge, the diode 2 rectifier bridge needs to be assembled first. The top of the rectifier bridge housing 1 is in an open form. The diode 2 is fixedly connected inside the rectifier bridge housing 1 in the initial state and is in an installed state. There are mounting plates 8 on both sides of the rectifier bridge housing 1, and there are mounting holes 9 on the mounting plates 8. The rectifier bridge housing 1 can be fixedly connected by passing the mounting screws 10 through the mounting holes 9.

[0056] Insert the sliding frame 4 between the two baffles 1 7. The bottom of the sliding frame 4 has matching balls 16 distributed at intervals, so that the matching balls 16 roll in the limiting groove 11. At this time, the sliding frame 4 can gradually slide inward on the rectifier bridge housing 1, and the top of the sliding frame 4 is movably fitted with the pressure strip 17. When the end of the sliding frame 4 slides to the innermost part, it will fit with the sealing plate 14 on the baffle 2 13. At this time, rotate the positioning plate 20, the positioning plate 20 is movably connected to the rotating shaft 19, and the rotating shaft 19 will rotate inside the positioning ring 18. When the positioning plate 20 is movably fitted with the rectifier bridge housing 1, take out the fastening screw 21, pass it through the positioning plate 20, and lock the fastening screw 21 in the threaded matching hole 12, so as to realize the installation of the sliding frame 4;

[0057] There is a heat sink inside the sliding frame 4, and there are heat dissipation holes 6 distributed at intervals on the heat sink. There are heat dissipation holes 3 distributed at intervals on the bottom plate of the rectifier bridge housing 1. When the rectifier bridge is in the case of high power output, the generated heat will be dissipated through the heat dissipation holes 3 and the heat dissipation holes 6, thereby effectively avoiding heat accumulation and improving the efficiency of the rectifier bridge under high power output conditions.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high efficiency diode rectifier bridge, characterized in that: The invention comprises a rectifier bridge housing (1) and a diode (2) extending from the interior of the rectifier bridge housing (1); the top of the rectifier bridge housing (1) is open; the bottom plate of the rectifier bridge housing (1) is provided with evenly distributed heat dissipation holes (3); a sliding frame (4) is provided at the top opening of the rectifier bridge housing (1); a limit control component is provided between the sliding frame (4) and the rectifier bridge housing (1); a heat dissipation plate (5) is provided inside the sliding frame (4); the heat dissipation plate (5) is provided with heat dissipation holes (6) distributed at intervals; and the heat dissipation holes (3) on the rectifier bridge housing (1) and the heat dissipation holes (6) on the heat dissipation plate (5) are staggered.

2. The diode rectifier bridge according to claim 1, characterized in that: The number of the diodes (2) is four, and the four diodes (2) are connected in a specific manner to form a "bridge" structure.

3. The diode rectifier bridge according to claim 1, characterized in that: Baffle plates (7) are provided on both sides of the rectifier bridge housing (1), the height of the baffle plates (7) is greater than the height of the rectifier bridge housing (1), mounting plates (8) are provided on the back sides of the two baffle plates (7) and near the bottom, mounting holes (9) are provided on the mounting plates (8), the cross section of the mounting holes (9) is waist-shaped, mounting screws (10) are provided in the mounting holes (9) on both sides, and the number of the mounting screws (10) on one side is not less than two.

4. The diode rectifier bridge according to claim 1, characterized in that: Limiting grooves (11) are provided downwardly on both sides of the top of the rectifier bridge housing (1), one end of the limiting groove (11) is open, the vertical cross-section of the limiting groove (11) is arc-shaped, and the arc is a minor arc, and threaded matching holes (12) are symmetrically provided on the front end surface of the rectifier bridge housing (1) and directly below the end surface of the limiting groove (11).

5. The diode rectifier bridge according to claim 4, characterized in that: A second baffle plate (13) is provided on the top of the rectifier bridge housing (1), and the second baffle plate (13) is arranged on a side of the limiting groove (11) away from the inlet, and a sealing plate (14) is provided on a side surface of the second baffle plate (13) close to the inlet of the limiting groove (11), and the sealing plate (14) is made of an elastic material.

6. The diode rectifier bridge according to claim 4, characterized in that: Spherical clamping holes (15) are arranged at intervals on both sides of the bottom of the sliding frame (4), and a matching ball (16) is arranged in the spherical clamping hole (15) for rolling connection. The internal surface area of ​​the spherical clamping hole (15) is not less than half of the surface area of ​​the matching ball (16), and the area of ​​the matching ball (16) extending out of the spherical clamping hole (15) cooperates with the limiting groove (11).

7. The diode rectifier bridge according to claim 4, characterized in that: The limit control assembly comprises a pressure strip (17), a positioning ring (18), a rotating shaft (19), a positioning plate (20) and a fastening screw (21); the pressure strip (17) is fixedly connected to the side of the baffle plate 2 (13) away from the diode (2) and on the top of the sealing plate (14); the cross section of the pressure strip (17) is concave; the notch of the pressure strip (17) faces the entrance of the limit groove (11); the positioning ring (18) is symmetrically connected to the concave sides of the pressure strip (17); and the rotating shaft (19) is rotatably connected to the inside of the positioning ring (18).

8. The diode rectifier bridge according to claim 7, characterized in that: When the sliding frame (4) enters the limiting groove (11), the sliding frame (4) and the pressure plate are movably fitted, and the positioning plate (20) is fixedly connected to the outer circular wall of the rotating shaft (19). When the positioning plate (20) is rotated until the sliding frame (4) fits each other, the fastening screw (21) passes through the positioning plate (20) and is locked in the threaded matching hole (12).

9. The diode rectifier bridge according to claim 1, characterized in that: The heat sink (5) is made of an elastic plastic material. A card plate (22) group is provided on opposite inner surfaces of the sliding frame (4). There are two card plates (22) on the same side. A card slot (23) is provided between the two card plates (22). Both ends of the heat sink (5) are movably inserted into the card slot (23).

10. The diode rectifier bridge according to claim 1, characterized in that: The diode (2) is provided with a sleeve (24) that is movably connected, the length of the sleeve (24) being greater than the length of the diode (2) extending out of the rectifier bridge housing (1), a sponge layer (25) being provided inside the sleeve (24), the vertical cross section of the sponge layer (25) being arc-shaped, and when the sleeve (24) is inserted into the diode (2), the sponge layer (25) wraps around the diode (2).

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