Bridge rectifier transfer fixture and system

Abstract

A bridge rectifier transfer clamp and system belong to the technical field of semiconductor device packaging, the transfer clamp comprises: a lifting plate with a rectangular hole; four inner support plates are arranged in the rectangular hole, the inner support plates are arranged to move in the vertical direction, and the inner sides of the inner support plates are provided with contact pieces at intervals; a center rod coaxially passes through the rectangular hole, the center rod is arranged to move in the vertical direction relative to the lifting plate, a lower end of the center rod is coaxially provided with a positioning rod arranged to move in the vertical direction, the outer wall of the center rod is provided with a guide block corresponding to each inner support plate, the inner wall of the guide block and the outer wall of the center rod have a vertical interval, and the outer side of the upper segment of the guide block is inclined. The transfer system comprises a conveying track, a feeding assembly, a transfer assembly and the bridge rectifier transfer clamp. The scheme can automatically clamp and assemble the rectifier, has high assembly efficiency, and can effectively ensure product quality.

Description

Technical Field

[0001] This invention belongs to the field of semiconductor device packaging technology, and particularly relates to a bridge rectifier transfer fixture and system. Background Technology

[0002] The structure of a common unidirectional bridge rectifier is as follows: Figure 1 As shown, the device includes a rectifier bridge at the top and a bridge housing for packaging. The rectifier bridge includes a substrate and multiple pins vertically arranged around the top of the substrate. A through-hole is formed in the center of the substrate, and a conduit is provided inside the bridge housing to position the through-hole. During packaging, the substrate of the rectifier bridge is inserted into the bridge housing, the conduit passes through the through-hole on the substrate, and then flowing grease is injected into the bridge housing. The grease will cover the entire substrate, and the liquid level of the grease is lower than the top surface of the bridge housing and the conduit. After the grease solidifies, a robust packaging structure is formed. The holes inside the conduit can be used to insert fastening screws during installation to prevent the rectifier from falling off.

[0003] In existing technologies, due to the special shape and structure of bridge rectifiers, there is no dedicated equipment for automated clamping and assembly during the packaging process. Typically, the rectifier bridge is manually installed into the bridge housing from the transfer tray, and then the housing and bridge are moved via a conveyor rail into the packaging equipment for injection molding. However, manual assembly is not only inefficient, but also prone to introducing impurities into the bridge housing, potentially leading to deterioration of electrical performance, short circuits, leakage, and other risks, ultimately affecting product reliability and long-term stability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a bridge rectifier transfer fixture and system that can automatically clamp and assemble rectifiers, achieving high assembly efficiency and effectively ensuring product quality.

[0005] In order to achieve the objective of this invention, the following solution is proposed:

[0006] A bridge rectifier transfer fixture, comprising:

[0007] The horizontally positioned lifting plate has rectangular holes along the vertical direction. The distance between the rectangular holes and the inner wall matches the distance between the outer sides of the corresponding rectifier bridge top surface and the outer sides of the pins on both sides.

[0008] There are four inner support plates, which are set in the rectangular hole and are parallel to the four inner walls of the rectangular hole. The inner support plates are movable in the vertical direction, and contact elements are provided on the inner side of the inner support plates at intervals.

[0009] The center rod passes through the rectangular hole coaxially and moves vertically relative to the lifting plate. A positioning rod is coaxially provided at its lower end and moves vertically. The outer diameter of the positioning rod is consistent with the outer diameter of the guide tube inside the axle housing. The outer wall of the center rod is provided with guide blocks that correspond one-to-one with the inner support plate. There is a vertically arranged gap between the inner wall of the guide block and the outer wall of the center rod. The upper outer section of the guide block is an inclined surface.

[0010] When the contact moves to the lower end of the ramp, the outer wall of the inner support plate and the inner wall of the corresponding rectangular hole are used to press the pins of the rectifier bridge.

[0011] When the actuator is located within the gap between the inner wall of the guide block and the outer wall of the center rod, the gap between the outer wall of the inner support plate and the inner wall of the corresponding rectangular hole is greater than the thickness of the pin.

[0012] A bridge rectifier transfer system includes a conveying track for conveying a bridge housing, a feeding assembly disposed on one side of the conveying track for providing a rectifier bridge, a transfer assembly disposed above the conveying track and the feeding assembly, and the aforementioned bridge rectifier transfer fixture. The transfer assembly is used to drive the transfer fixture to clamp the rectifier bridge on the feeding assembly and transfer the rectifier bridge to a predetermined position on the conveying track for assembly with the bridge housing.

[0013] The beneficial effects of this invention are as follows: the transfer fixture can adapt to and clamp rectifier bridges with special structures, and the automatic clamping and assembly of rectifier bridges can be achieved through the transfer system, which helps to improve assembly efficiency and ensure product quality. Attached Figure Description

[0014] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of the invention.

[0015] Figure 1 A schematic diagram of the rectifier bridge and its housing is shown.

[0016] Figure 2 A schematic diagram of the top structure of the transfer fixture of this application is shown.

[0017] Figure 3 A schematic diagram of the bottom structure of the transfer fixture of this application is shown.

[0018] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0019] Figure 5 A cross-sectional view of the transfer fixture is shown when the positioning rod is inserted into a through hole on the substrate.

[0020] Figure 6 A cross-sectional view of the transfer fixture is shown when the bottom surface of the center rod is pressed against the substrate.

[0021] Figure 7 A schematic diagram of the top structure of the transfer fixture is shown when the inner support plate clamps the pin.

[0022] Figure 8 It shows Figure 7 A magnified view of a section at point B.

[0023] Figure 9 A cross-sectional view of the transfer clamp is shown when the positioning rod is docked with the conduit inside the axle housing.

[0024] Figure 10 A cross-sectional view of the transfer fixture is shown when the rectifier bridge is installed into the bridge housing.

[0025] Figure 11 A cross-sectional view of the transfer fixture is shown as the contact moves below the guide block.

[0026] Figure 12 This shows a state view of the transfer fixture as the contact element moves below the guide block.

[0027] Figure 13 It shows Figure 12 A magnified view of a section at point C.

[0028] Figure 14 A cross-sectional view of the transfer fixture is shown when the contact element is inside the gap between the guide block and the center rod.

[0029] Figure 15 A cross-sectional view of the transfer clamp is shown when the return spring and the compression spring are in their natural states.

[0030] Figure 16 A schematic diagram of the overall structure of the transfer system of this application is shown.

[0031] The markings in the diagram are: Lifting plate-1, Rectangular hole-11, Cantilever-12, Inner support plate-2, Contact element-21, Reset spring-22, Limiting rod-23, Center rod-3, Compression spring-31, Protrusion-32, Mounting hole-33, Telescopic spring-34, Positioning rod-4, Guide block-5, Inclined surface-51, Chamfered structure-52, Locking block-53, Edge-531, Baffle-532, Countersunk hole-54, Raised edge-541, Support spring-55, Conveying track-6, Feeding assembly-7, First linear mechanism-71, Second linear mechanism-72, Pallet-73, Transfer assembly-8, Horizontal linear mechanism-81, Vertical linear mechanism-82. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the implementation methods of the present invention will be described in detail below with reference to the accompanying drawings. However, the embodiments described in this invention are only some embodiments of the present invention, and not all embodiments.

[0033] like Figure 1 As shown, the bridge rectifier includes a rectifier bridge and a bridge housing. The rectifier bridge includes a substrate and multiple pins vertically arranged around the top of the substrate. A through-hole is formed in the center of the substrate, and a conduit is provided inside the bridge housing to position the through-hole. During packaging, the substrate of the rectifier bridge needs to be inserted into the bridge housing, and the conduit passes through the through-hole on the substrate.

[0034] Example 1: A bridge rectifier transfer fixture for holding the aforementioned rectifier bridge, such as... Figures 2 to 15 As shown, the transfer fixture includes: a lifting plate 1, an inner support plate 2, and a center rod 3.

[0035] Specifically, such as Figure 2 , Figure 3 and Figures 5 to 7 As shown, the lifting plate 1 is horizontally arranged, and it has a rectangular hole 11 in the vertical direction. The distance between the rectangular hole 11 and the inner wall is matched with the distance between the outer sides of the corresponding rectifier bridge top surface and the corresponding pins. Specifically, the distance between the rectangular hole 11 and the inner wall can be equal to or greater than the distance between the outer sides of the corresponding rectifier bridge top surface and the corresponding pins.

[0036] Specifically, such as Figure 2 , Figure 3 As shown, there are four inner support plates 2, which are disposed in the rectangular hole 11 and are parallel to the four inner walls of the rectangular hole 11 respectively. The inner support plates 2 are moved in a vertical direction, which refers to the direction perpendicular to the plane where the inner support plate 2 is located, or the direction perpendicular to the inner wall of the rectangular hole 11 corresponding to the inner support plate 2. Contact elements 21 are provided at intervals on the inner side of the inner support plate 2. As can be seen from the attached figure, the inner side of the inner support plate 2 is the side of the inner support plate 2 facing the middle of the rectangular hole 11.

[0037] Specifically, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the central rod 3 coaxially passes through the rectangular hole 11. The central rod 3 is vertically movable relative to the lifting plate 1. A positioning rod 4 is coaxially provided at its lower end. The positioning rod 4 is vertically movable inside the central rod 3. The outer diameter of the positioning rod 4 is consistent with the outer diameter of the guide tube inside the bridge housing. The outer wall of the central rod 3 is provided with guide blocks 5 that correspond one-to-one with the inner support plate 2. There is a vertically arranged gap between the inner wall of the guide block 5 and the outer wall of the central rod 3. The upper outer section of the guide block 5 is an inclined surface 51. Since the inclined surface 51 is located on the outer side of the upper section of the guide block 5, the inclined surface 51 must be tilted towards the upper side of the guide block 5.

[0038] like Figure 6 , Figure 7As shown, when the contact 21 moves to the lower end of the inclined surface 51, the outer wall of the inner support plate 2 and the inner wall of the corresponding rectangular hole 11 are used to press the pins of the rectifier bridge. The four inner support plates 2 and the four inner walls of the rectangular holes 11 that correspond to them will simultaneously press the four pins on the top surface of the rectifier bridge substrate.

[0039] like Figure 14 As shown, when the actuator 21 is located in the gap between the inner wall of the guide block 5 and the outer wall of the center rod 3, the gap between the outer wall of the inner support plate 2 and the inner wall of the corresponding rectangular hole 11 is greater than the thickness of the pin.

[0040] The process of assembling the rectifier bridge into the bridge housing using the above scheme mainly includes two processes: clamping and assembly.

[0041] The clamping process is as follows:

[0042] The first step is to move the fixture above the rectifier bridge so that the rectifier bridge is aligned with the rectangular hole 11 in the vertical direction, and the pins of the rectifier bridge correspond one by one with the four inner walls of the rectangular hole 11. This process can be achieved by using a robotic arm or a linear moving mechanism arranged in a longitudinal and transverse manner.

[0043] The second step, as Figure 5 As shown, the center rod 3 is moved downwards, and the positioning rod 4 is inserted into the through hole on the substrate first to achieve precise positioning between the rectifier bridge and the fixture. Then, the bottom surface of the center rod 3 is brought into contact with the top surface of the substrate.

[0044] The third step, as Figure 6 As shown, the lifting plate 1 is moved downward so that the pin is inserted into the rectangular hole 11. During this process, the contact 21 moves downward along the upper end of the inclined surface 51, while the inner support plate 2 moves towards the inner wall of the corresponding rectangular hole 11 under the cooperation of the contact 21 and the inclined surface 51. When the contact 21 contacts the lower end of the inclined surface 51, the outer side of the inner support plate 2 and the inner wall of the corresponding rectangular hole 11 will press the pin together.

[0045] Fourth step, simultaneously move the center rod 3 and the lifting plate 1 upwards to keep the inner support plate 2 pressing against the pins, thus completing the clamping operation of the rectifier bridge.

[0046] The assembly process is as follows:

[0047] The first step is to move the bridge housing or clamp to align the clamp above the bridge housing;

[0048] The second step, as Figure 9 , Figure 10As shown, the center rod 3 and the lifting plate 1 are moved downwards at the same time. The positioning rod 4 will first align with the guide tube inside the bridge housing. Then the center rod 3 and the lifting plate 1 continue to descend. The center rod 3 is used to push the substrate into the bridge housing and make the through hole on the substrate fit onto the guide tube until the bottom surface of the substrate contacts the bottom surface of the bridge housing.

[0049] The third step, as Figure 11 As shown, the lifting plate 1 is moved downward, so that the contact 21 moves below the guide block 5, and then the inner support plate 2 moves toward the center rod 3 in a direction perpendicular to itself, so that the inner support plate 2 releases the pressing state on the pin.

[0050] Step four, as Figure 14 As shown, the contact 21 is moved to the gap between the inner wall of the guide block 5 and the outer wall of the center rod 3, and the lifting plate 1 is moved upward, so that the rectangular hole 11 moves out above the pin, and the contact 21 is moved above the guide block 5. This state can also be understood as the center rod 3 moving downward relative to the lifting plate 1. At this time, the center rod 3 still maintains the state of pressing against the substrate to prevent the lifting plate 1 from lifting the rectifier bridge upward through the pin.

[0051] Fifth step: Simultaneously move the lifting plate 1 and the center rod 3 upward to separate the clamp from the bridge housing and the rectifier bridge, thus completing the assembly work.

[0052] Preferred, such as Figure 2 , Figure 3 As shown, a cantilever 12 is provided on the top surface of the lifting plate 1. The top of the central rod 3 and the bottom of the cantilever 12 are connected by a vertically arranged compression spring 31. A return spring 22 is provided between the inner support plate 2 and the lifting plate 1. The extension and retraction direction of the return spring 22 is perpendicular to the corresponding inner support plate 2.

[0053] like Figure 2 , Figure 15 As shown, when both the compression spring 31 and the return spring 22 are in their natural state, which can also be understood as the clamp being in a non-clamping state, the contact 21 is located above the guide block 5, and the projection of the contact 21 on the horizontal plane is within the range of the inclined plane 51. At this time, the distance between the bottom surface of the positioning rod 4 and the bottom surface of the lifting plate 1 is greater than the distance between the bottom surface of the substrate and the upper end of the pin. During the process of the contact 21 moving downward from the upper end of the inclined plane 51, the return spring 22 is in a continuously compressed state.

[0054] With the above structural design, the contact 21 can automatically contact the inclined surface 51 during the upward movement of the central rod 3 relative to the lifting plate 1; after the contact 21 moves upward from the gap between the inner wall of the guide block 5 and the outer wall of the central rod 3, the return spring 22 is used to misalign the contact 21 with the gap, preventing the contact 21 from inserting into the gap from above when the central rod 3 rises relative to the lifting plate 1; furthermore, after the contact 21 moves below the guide block 5, the return spring 22 can be used to automatically move the inner support plate 2 towards the central rod 3 to achieve the purpose of automatically releasing the pin; and a clamping spring is provided. 31. When the contact 21 moves to the gap between the inner wall of the guide block 5 and the outer wall of the center rod 3, the compression spring 31 drives the center rod 3 to move automatically upward relative to the lifting plate 1, and the contact 21 moves out of the gap. Because when the compression spring 31 is in its natural state, the contact 21 is above the guide block 5. Therefore, when the contact 21 is below the guide block 5, the compression spring 31 is naturally in a stretched state. When the contact 21 is no longer restricted by the lower end of the guide block 5, the center rod 3 will move automatically upward relative to the lifting plate 1 under the action of the compression spring 31.

[0055] As a further preferred option, such as Figure 2 , Figure 3 , Figure 5 , Figure 6 As shown, a connecting rod extends upward from the upper end of the center rod 3. A compression spring 31 is sleeved on the outside of the connecting rod. The upper end of the connecting rod passes upward through the cantilever 12, and a limiting block is provided at the top of the connecting rod corresponding to the upper part of the cantilever 12 to prevent the connecting rod from falling off.

[0056] Preferred, such as Figure 4 , Figure 8 As shown, the lower end of the inner wall of the guide block 5 has a chamfered structure 52. (As indicated...) Figure 11 , Figure 13 and Figure 15 As shown, when the return springs 22 are in their natural state, the projection of the contact 21 on the horizontal plane is within the range of the chamfered structure 52. This ensures that when the return springs 22 are in their natural state, the contact 21 can smoothly enter the gap between the inner wall of the guide block 5 and the outer wall of the center rod 3. After the contact 21 moves out of the gap, it can automatically move to the top of the inclined surface 51 under the action of the return springs 22, thereby automatically controlling the movement direction of the inner support plate 2 using the guide block 5.

[0057] Preferred, such as Figure 4 , Figure 8As shown, a locking block 53 is movably connected to the lower end of the inclined surface 51 on the outer side of the guide block 5 to restrict the upward movement of the contact member 21. When the contact member 21 moves below the locking block 53, the compression spring 31 is in a stretched state. At the same time, because the contact member 21 is at the lower end of the inclined surface 51 and is in the state of pressing the pin, the locking block 53 blocks the contact member 21, which can prevent the contact member 21 from moving upward under the action of the spring force of the compression spring 31, and avoid the loss of the pin pressing force during the transfer process.

[0058] Specifically, the movable connection of the locking block 53 is as follows: a countersunk hole 54 is provided on the outer side of the guide block 5, and the opening direction of the countersunk hole 54 is consistent with the moving direction of the inner support plate 2. A support spring 55 is provided in the countersunk hole 54, and the guide block 5 passes through the countersunk hole 54. When the support spring 55 is in its natural state, the locking block 53 protrudes from the outer side of the guide block 5. The top surface of the locking block 53 has a guide surface that faces the inclined surface 51, so that when the contact member 21 moves downward, it pushes the locking block 53 into the countersunk hole 54, thereby allowing the contact member 21 to move smoothly to the bottom of the locking block 53.

[0059] As a further preferred option, such as Figure 4 , Figure 8 As shown, the opening of the countersunk hole 54 is provided with a protruding edge 541, and the outer wall of the locking block 53 is provided with a ridge edge 531. The structure of the protruding edge 541 and the ridge edge 531 can prevent the locking block 53 from falling out of the countersunk hole 54.

[0060] Specifically, the protruding edge 541 can be installed into the countersunk hole 54 by means of screw connection, or the countersunk hole 54 can be machined from the side of the guide block 5, and the protruding edge 541 can be formed at the same time as the countersunk hole 54 is machined.

[0061] As another preferred option, the movable connection of the locking block 53 can also be achieved by designing the locking block 53 as a pawl structure, with its upper end rotated to the outside of the guide block 5, so that the locking block 53 can only swing downward in one direction, but cannot swing upward. This can also satisfy the requirement that the contact member 21 passes over the locking block 53 downward and that the locking block 53 blocks the contact member 21 from rising.

[0062] Preferred, such as Figure 4 , Figure 8As shown, an elastic element is provided between the locking block 53 and the guide block 5. A baffle 532 is provided on the bottom surface of the locking block 53. When the contact 21 is located below the locking block 53, the baffle 532 abuts against the contact 21, and the elastic element is in a compressed state. This structure uses the elastic element to generate an elastic clamping force on the pin through the contact 21 and the inner support plate 2, avoiding pin deformation caused by mechanical hard contact clamping. Furthermore, by using the elastic force to clamp the pin, the lifting plate 1 can be moved downward relative to the pin in the state of pin clamping, reducing the friction between the lifting plate 1 and the pin, allowing the lifting plate 1 to slide smoothly downward along the pin, so that the contact 21 can move smoothly to the bottom of the guide block 5. As a preferred embodiment, the elastic element here can also be understood as the support spring 55 in the above preferred embodiment.

[0063] Preferred, such as Figure 3 As shown, a limiting rod 23 is provided at the lower end of the outer side of the inner support plate 2, such as... Figure 6 As shown, when the contact element 21 moves to the lower end of the inclined plane 51, the limiting rod 23 engages below the lifting plate 1. Figure 15 As shown, when the reset springs 22 are all in their natural state, the projection of the limit rod 23 on the horizontal plane is located in the rectangular hole 11. This structure can prevent the center rod 3 from moving upward relative to the lifting plate 1, thereby keeping the inner support plate 2 pressed against the pin.

[0064] Preferred, such as Figure 3 , Figure 4 As shown, the guide block 5 is connected to a protrusion 32 on the outer wall of the central rod 3, and guide blocks 5 are provided on both sides of the protrusion 32. The inner support plate 2 is provided with contact members 21 on both sides of the guide blocks 5 corresponding to the same protrusion 32 to ensure the stability of the inner support plate 2 when it moves. As a further preferred solution, the contact member 21 is a cylindrical roller structure, which makes rolling contact with the guide block 5.

[0065] Preferred, such as Figure 2 As shown, the contact members 21 are located on both sides of the lower end of the inner support plate 2. The middle part of the lower end of the inner support plate 2 has a relief groove to avoid the protrusion 32, so as to ensure that the guide block 5 and the protrusion 32 do not collide with the inner support plate 2 in a limited space.

[0066] Preferred, such as Figure 4 , Figure 5 , Figure 9 and Figure 10As shown, a mounting hole 33 is coaxially provided at the bottom of the center rod 3. The upper end of the positioning rod 4 passes through the mounting hole 33. A telescopic spring 34 is provided between the top surface of the positioning rod 4 and the top of the mounting hole 33. When the telescopic spring 34 is in its natural state, the distance between the bottom surface of the positioning rod 4 and the center rod 3 is greater than the thickness of the substrate. The lower end of the positioning rod 4 is inverted conical, and the distance between the cone apex and the cone bottom is less than the thickness of the substrate. The outer diameter of the cone apex is smaller than the inner diameter of the inner conduit of the bridge housing. The above structural design can not only use the positioning rod 4 to position the substrate when clamping the rectifier bridge, but also use the inverted conical shape of the lower end of the positioning rod 4 to cooperate with the inner hole of the conduit during assembly to achieve the purpose of positioning the bridge housing, rectifier bridge and fixture.

[0067] Example 2: A bridge rectifier transfer system includes a conveying track 6 for conveying the bridge housing, a feeding assembly 7 located on one side of the conveying track 6 for providing the rectifier bridge, a transfer assembly 8 located above the conveying track 6 and the feeding assembly 7, and the bridge rectifier transfer fixture described in Example 1. The transfer assembly 8 is used to drive the transfer fixture to clamp the rectifier bridge on the feeding assembly 7 and transfer the rectifier bridge to a predetermined position on the conveying track 6 for assembly with the bridge housing.

[0068] Specifically, such as Figure 16 As shown, the feeding assembly 7 includes a first linear mechanism 71 and a second linear mechanism 72 vertically mounted on the first linear mechanism 71. Both the first linear mechanism 71 and the second linear mechanism 72 are horizontally arranged. The movable part of the second linear mechanism 72 is used to receive the tray 73 on which the rectifier bridge is placed. The first linear mechanism 71 is used to drive the second linear mechanism 72 to reciprocate in a horizontal direction, and the second linear mechanism 72 is used to drive the tray 73 to reciprocate in a direction perpendicular to the movement of the second linear mechanism 72, so that the rectifier bridges placed on the tray 73 can all be moved to the same position, thereby facilitating the clamping of the rectifier bridges. The transfer assembly 8 includes a horizontal linear mechanism 81, and the movable part of the horizontal linear mechanism 81 is provided with a vertical linear mechanism 82. The horizontal linear mechanism 81 moves the vertical linear mechanism 82 in a horizontal direction. The movable end of the vertical linear mechanism 82 faces downward and is connected to the lifting plate 1. The vertical linear mechanism 82 can control the movement of the lifting plate 1 in a vertical direction, thereby automatically completing the clamping and assembly of the rectifier bridges.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A bridge rectifier transfer fixture, characterized by, include: A horizontally set lifting plate (1) has a rectangular hole (11) in the vertical direction. The distance between the rectangular hole (11) and the inner wall is matched with the distance between the outer sides of the corresponding rectifier bridge top surface and the outer sides of the pins. There are four inner support plates (2) in total, which are set in the rectangular hole (11) and are parallel to the four inner walls of the rectangular hole (11). The inner support plates (2) are moved in the vertical direction and the inner side of the inner support plates (2) is provided with contact elements (21) at intervals. The center rod (3) passes through the rectangular hole (11) coaxially. The center rod (3) moves vertically relative to the lifting plate (1). The lower end of the center rod (3) is coaxially provided with a positioning rod (4). The positioning rod (4) moves vertically. The outer diameter of the positioning rod (4) is consistent with the outer diameter of the guide tube inside the bridge housing. The outer wall of the center rod (3) is provided with guide blocks (5) that correspond one-to-one with the inner support plate (2). The inner wall of the guide block (5) and the outer wall of the center rod (3) have a vertically arranged gap. The upper outer section of the guide block (5) is an inclined surface (51). When the contact (21) moves to the lower end of the ramp (51), the outer wall of the inner support plate (2) and the inner wall of the corresponding rectangular hole (11) are used to press the pins of the rectifier bridge. When the trigger (21) is located in the gap between the inner wall of the guide block (5) and the outer wall of the center rod (3), the gap between the outer wall of the inner support plate (2) and the inner wall of the corresponding rectangular hole (11) is greater than the thickness of the pin.

2. The bridge rectifier transfer fixture according to claim 1, characterized in that, A cantilever (12) is provided on the top surface of the lifting plate (1). The top of the center rod (3) is connected to the bottom of the cantilever (12) by a vertically arranged compression spring (31). A return spring (22) is provided between the inner support plate (2) and the lifting plate (1). The extension and retraction direction of the return spring (22) is perpendicular to the corresponding inner support plate (2). When both the compression spring (31) and the reset spring (22) are in their natural state, the contact (21) is located above the guide block (5), and the projection of the contact (21) on the horizontal plane is within the range of the inclined plane (51). At this time, the distance between the bottom surface of the positioning rod (4) and the bottom surface of the lifting plate (1) is greater than the distance between the bottom surface of the substrate and the top end of the pin.

3. A bridge rectifier transfer fixture according to claim 2, characterized in that, The lower end of the inner wall of the guide block (5) has a chamfered structure (52). When the return spring (22) is in its natural state, the projection of the contact (21) on the horizontal plane is within the range of the chamfered structure (52).

4. A bridge rectifier transfer fixture according to claim 2, characterized in that, A locking block (53) is movably connected to the lower end of the inclined surface (51) on the outer side of the guide block (5) to restrict the upward movement of the contact element (21).

5. A bridge rectifier transfer fixture according to claim 4, characterized in that, An elastic element is provided between the locking block (53) and the guide block (5). A baffle (532) is provided on the bottom surface of the locking block (53). When the contact element (21) is located below the locking block (53), the baffle (532) abuts against the contact element (21), and the elastic element is in a compressed state.

6. A bridge rectifier transfer fixture according to claim 2, characterized in that, The lower end of the outer side of the inner support plate (2) is provided with a limiting rod (23). When the contact (21) moves to the lower end of the inclined plane (51), the limiting rod (23) is inserted into the lower part of the lifting plate (1). When the reset spring (22) is in the natural state, the projection of the limiting rod (23) on the horizontal plane is located in the rectangular hole (11).

7. A bridge rectifier transfer fixture according to claim 1, characterized in that, The guide block (5) is connected to a protrusion (32) on the outer wall of the central rod (3), and guide blocks (5) are provided on both sides of the protrusion (32). The inner support plate (2) is provided with contact elements (21) on both sides of the guide blocks (5) of the same protrusion (32).

8. A bridge rectifier transfer fixture according to claim 7, characterized in that, Contact elements (21) are provided on both sides of the lower end of the inner support plate (2), and the middle part of the lower end of the inner support plate (2) has a relief groove for avoiding the protrusion (32).

9. A bridge rectifier transfer fixture according to claim 1, characterized in that, The bottom of the center rod (3) is coaxially provided with a mounting hole (33). The upper end of the positioning rod (4) passes through the mounting hole (33). A telescopic spring (34) is provided between the top surface of the positioning rod (4) and the top of the mounting hole (33). When the telescopic spring (34) is in its natural state, the distance between the bottom surface of the positioning rod (4) and the center rod (3) is greater than the thickness of the substrate. The lower end of the positioning rod (4) is an inverted cone, and the distance between the cone apex and the cone bottom is less than the thickness of the substrate. The outer diameter of the cone apex is less than the inner diameter of the inner conduit of the bridge housing.

10. A bridge rectifier transfer system, characterized in that, The rectifier includes a conveying track (6) for conveying the bridge housing, a feeding assembly (7) provided on one side of the conveying track (6) for providing the rectifier bridge, a transfer assembly (8) provided above the conveying track (6) and the feeding assembly (7), and a bridge rectifier transfer fixture as described in any one of claims 1 to 9. The transfer assembly (8) is used to drive the transfer fixture to clamp the rectifier bridge on the feeding assembly (7) and transfer the rectifier bridge to a predetermined position on the conveying track (6) for assembly with the bridge housing.

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