Universal pin switching clamp for IGBT (Insulated Gate Bipolar Translator) power module

Abstract

The utility model discloses a general pin switching fixture for IGBT power modules, which comprises a pin body and a pin switching fixture body, the pin switching fixture body comprises a conical sleeve and a branch pipe fixedly connected to the top of the conical sleeve, the pin body is positioned in the conical sleeve, the top end of the branch pipe is provided with a plugging structure, the top of the branch pipe is fixedly connected with a U-shaped handle, and the U-shaped handle is fixedly connected with the conical sleeve. Two telescopic vertical missile supporting assemblies are fixedly embedded in the inner wall of the top of the supporting pipe. By arranging a series of structures, a pin body can be conveniently, rapidly and conveniently clamped and unclamped in a simple pulling and loosening mode, compared with an existing mode which needs to rotate for multiple circles and is prone to hand slipping, operation convenience and efficiency are effectively improved, the clamping force can be conveniently adjusted according to use requirements, and the pin body can be conveniently and rapidly clamped and unclamped. Therefore, clamping stability and subsequent long-term use stability are further improved, and convenience is brought to personnel to use.

Description

Technical Field

[0001] The utility model relates to the technical field of pin needle transfer clamps, in particular to a pin needle transfer clamp universal for an IGBT power module. Background Art

[0002] A power module is a power switch module that is packaged with power electronic devices such as metal oxide semiconductors (power MOS tubes), insulated gate field effect transistors (IGBTs), and fast recovery diodes (FRDs) according to a certain functional combination. It is mainly used for power conversion in various occasions such as electric vehicles, photovoltaic power generation, wind power generation, and industrial frequency conversion. Traditionally, soldering can be used to connect power modules with pins to voltage sources. This method requires soldering the power terminals of the product, which can easily damage the module. When testing with a fixture, the tin on the terminals needs to be melted and absorbed. This method is not only cumbersome to operate, but also prone to poor contact, excessive impedance, heat accumulation, and the risk of melting and falling solder at the connection, causing the experiment to be interrupted.

[0003] To solve this problem, a search by a novelty search agency revealed that announcement number CN218658562U discloses a universal pin needle adapter fixture for IGBT power modules, comprising a pin sleeve portion, a connecting portion and a positioning portion, wherein a conical tightening portion with a smaller bottom and a larger top is provided at the bottom of the pin sleeve portion; the positioning portion comprises a plurality of elastic claws arranged at intervals and matched with the conical tightening portion; a plurality of elastic claws form a clamping position matched with the pin needle, and the pin needle is clamped on the connecting portion, and the plurality of elastic claws are adjusted by rotating the thread between the connecting portion and the pin sleeve portion to enable the plurality of elastic claws to contact and fix the pin needle, without the need for solder connection and without damage to the power module, and the elastic claws are contracted toward the center by rotating and tightening the thread to grasp the pin needle, thereby ensuring good contact between the elastic claws and the pin needle, reducing the contact impedance, and preventing local heat accumulation.

[0004] The universal pin needle adapter clamp for IGBT power modules disclosed in the above technology, through the arrangement of the pin sleeve part, the conical tightening part, the elastic claws and the connecting part, utilizes the threads on the outer side of the connecting part and the threads on the inner side of the pin sleeve part, and can drive the three elastic claws to form an extrusion with the inner side of the conical tightening part during rotation, so as to drive the three elastic claws to shrink toward the middle to effectively clamp and contact the pin needle, thereby ensuring good contact. However, there are still the following deficiencies during use: 1. (The method of pushing and shrinking the three elastic claws by rotating the connecting part and utilizing the threaded connection. Since the connecting part is round, small and smooth, it is easy for the hands to slip during the tightening operation, resulting in difficulty in controlling the elastic claws to perform the clamping work, and both clamping and releasing require multiple rotations), which is inconvenient for personnel to perform the clamping and releasing operations easily, conveniently and quickly, and the convenience of use is not ideal; improvement is needed. In view of this, the present application proposes a universal pin needle adapter clamp for IGBT power modules to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a universal pin transfer fixture for an IGBT power module to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a universal pin needle adapter fixture for IGBT power module, comprising a pin needle body and a pin needle adapter fixture body, the pin needle adapter fixture body comprising a conical sleeve and a branch pipe fixedly connected to the top thereof, the pin needle body is located in the conical sleeve, the top end of the branch pipe is arranged as a blocking structure, a U-shaped handle is fixedly connected to the top of the branch pipe, two telescopic vertical missile support assemblies are embedded and fixed on the top inner wall of the branch pipe, the bottom ends of the two telescopic vertical missile support assemblies are fixedly connected to the same insulating plate, a copper plate is embedded and fixed to the bottom of the insulating plate, the four sides of the bottom of the copper plate are fixedly connected to arc-shaped elastic claws in an inwardly tightened state, the two opposite arc-shaped elastic claws are symmetrically arranged, and the repelling sides of the two opposite arc-shaped elastic claws are movably embedded with movable claws that are movable with the inner side of the conical sleeve. The copper plate is fixedly connected to the top of the U-shaped handle and is arranged in a circular ring structure. The telescopic vertical missile support assembly is used to guide the insulating plate vertically and elastically tighten it downward, and drive it to move downward in an elastically tightened manner. The elastically tightened insulating plate is used to drive the four arc-shaped elastic claws to move downward through the copper plate. When the four arc-shaped elastic claws move downward, they drive the four balls to roll downward along the inner wall of the conical sleeve, and are limited by the conical shape of the conical sleeve to shrink inward when moving downward, so as to drive the four arc-shaped elastic claws to tighten and shrink inward for clamping. The copper rod is used to drive the insulating plate and the copper plate to move upward when being pulled upward, and the copper plate is used to drive the four arc-shaped elastic claws to move upward to relax the extrusion force generated by the inner wall of the conical sleeve, and then the elasticity of the arc-shaped elastic claws is used to rebound outward and reset to release the clamping work.

[0007] A threaded lifting and pressure regulating assembly is rotatably embedded on the inner wall of the top end of the branch pipe, and the threaded lifting and pressure regulating assembly is movably mounted on the two telescopic vertical missile support assemblies. The telescopic vertical missile support assembly is used to adjust the downward tensioning force of the telescopic vertical missile support assembly on the insulating plate, so as to flexibly provide better elastic downward driving force, and further provide better clamping force to the four arc-shaped elastic claws.

[0008] Preferably, the telescopic vertical missile support assembly includes an outer tube embedded and fixed on the inner wall of the top end of the branch tube, an inner rod is provided in the sliding sleeve of the outer tube, the bottom end of the inner rod is fixedly connected to the top of the insulating plate, and compression springs in a compressed state are fixedly connected on both sides of the top of the insulating plate, and the compression spring movable sleeve is arranged on the outside of the corresponding outer tube and inner rod.

[0009] Preferably, the threaded lifting and pressure regulating assembly includes an externally threaded tube rotatably embedded on the inner wall of the top end of the branch tube, a lifting plate is threadedly sleeved on the externally threaded tube, the lifting plate is slidingly sleeved on the two outer tubes, the bottom of the lifting plate is fixedly connected to the top ends of the two compression springs, the top ends of both sides of the externally threaded tube are fixedly connected to handle rods located above the branch tube, and the copper rod is located inside the externally threaded tube and does not contact the inner wall of the externally threaded tube.

[0010] Preferably, the pin body is located between the four arc-shaped elastic claws and is in tight contact with the four arc-shaped elastic claws.

[0011] Preferably, the adjacent sides of the two opposite arc-shaped elastic claws are both configured as sawtooth structures.

[0012] Preferably, the conical sleeve is made of hard plastic insulating material.

[0013] Preferably, a threaded hole threadably connected to the external threaded pipe is provided on the top of the lifting plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This is a universal pin transfer fixture for IGBT power modules. Through the support pipe, U-shaped handle, copper rod, insulating plate, copper sheet, arc-shaped elastic claw, ball and telescopic vertical missile support assembly, the pin body can be clamped and released conveniently and quickly by simply pulling and releasing. Compared with the existing method that requires multiple rotations and is prone to hand slippage, the convenience and efficiency of operation are effectively improved;

[0016] 2. This is a universal pin adapter clamp for IGBT power modules. Through the cooperation of the telescopic vertical missile support assembly and the threaded lifting and voltage regulating assembly, the clamping force can be adjusted according to the use requirements to further improve the stability during clamping. The clamping force only needs to be adjusted once regularly to avoid the phenomenon that the compression spring elastic fatigue cannot meet the stable clamping requirements due to long-term use.

[0017] The utility model is provided with a series of structures, which makes it convenient and quick to clamp and release the pin needle body by simply pulling and releasing. Compared with the existing method that requires multiple rotations and is prone to hand slippage, the utility model effectively improves the convenience and efficiency of operation, and is easy to adjust the clamping force according to usage requirements, so as to further improve the stability during clamping and subsequent long-term use stability, which is convenient for personnel to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a universal pin transfer fixture for an IGBT power module proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of a universal pin transfer fixture for an IGBT power module proposed by the utility model;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure.

[0021] In the figure: 1. branch pipe; 2. U-shaped handle; 3. conical sleeve; 4. insulating plate; 5. arc-shaped elastic claw; 6. ball; 7. copper plate; 8. copper rod; 9. external threaded pipe; 10. handle rod; 11. lifting plate; 12. outer tube; 13. inner rod; 14. compression spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 3As shown, a universal pin adapter fixture for IGBT power modules proposed in this embodiment includes a pin body and a pin adapter fixture body, the pin adapter fixture body includes a conical sleeve 3 and a branch pipe 1 fixedly connected to the top thereof, the pin body is located in the conical sleeve 3, the top of the branch pipe 1 is set as a blocking structure, the top of the branch pipe 1 is fixedly connected to a U-shaped handle 2, two telescopic vertical missile support assemblies are embedded and fixed on the inner wall of the top of the branch pipe 1, the bottom ends of the two telescopic vertical missile support assemblies are fixedly connected to the same insulating plate 4, and the bottom of the insulating plate 4 is embedded and fixed There is a copper plate 7, wherein the bottom of the insulating plate 4 is provided with an embedding groove fixedly connected to the outer side of the copper plate 7, the four sides of the bottom of the copper plate 7 are fixedly connected with arc-shaped elastic claws 5 in an inwardly tightened state, the two opposite arc-shaped elastic claws 5 are symmetrically arranged, and the two opposite arc-shaped elastic claws 5 repel each other on one side and are movably embedded with a ball 6 that is in active contact with the inner side of the conical sleeve 3, the top of the copper plate 7 is fixedly connected with a copper rod 8, the top of the copper rod 8 extends into the U-shaped handle 2 and is set to a circular ring structure, wherein the top of the insulating plate 4 is provided with an active through hole for the copper rod 8 to pass through, and the pin body It is located between the four arc-shaped elastic claws 5 and is in tight contact with the four arc-shaped elastic claws 5. The adjacent sides of the two opposite arc-shaped elastic claws 5 are both set to a serrated structure. The conical sleeve 3 is made of hard plastic insulating material, and the arc-shaped elastic claws 5 are made of elastic conductive material, such as elastic copper sheet, elastic steel sheet, etc. The telescopic vertical missile support assembly is used to guide the insulating plate 4 vertically and elastically tighten it downward, and drive it to move downward in an elastically tightened manner, and use the elastically tightened insulating plate 4 to drive the four arc-shaped elastic claws 5 to move downward through the copper plate 7, and the four arc-shaped elastic claws 5 drive four ball bearings when they move downward. 6 rolls downward along the inner wall of the conical sleeve 3, and is limited by the conical shape of the conical sleeve 3 to shrink inward when moving downward, so as to drive the four arc-shaped elastic claws 5 to tighten and shrink inward to perform clamping work. The provided sawtooth structure is used to enhance the anti-slip effect during clamping to improve the stability during clamping. The provided copper rod 8 is used to drive the insulating plate 4 and the copper plate 7 to move upward when being pulled upward, and the copper plate 7 is used to drive the four arc-shaped elastic claws 5 to move upward to relax the extrusion force generated by the inner wall of the conical sleeve 3, and then the arc-shaped elastic claws 5 are used to rebound outward and reset to release the clamping work by their own elasticity;

[0024] A threaded lifting and pressure regulating assembly is rotatably embedded on the inner wall of the top end of the branch pipe 1, and the threaded lifting and pressure regulating assembly is movably sleeved on the two telescopic vertical missile support assemblies. The telescopic vertical missile support assembly is used to adjust the downward tightening force of the telescopic vertical missile support assembly on the insulating plate 4, so as to flexibly provide better elastic downward driving force, and further provide better clamping force to the four arc-shaped elastic claws 5.

[0025] Specifically, the telescopic vertical missile support assembly includes an outer tube 12 embedded and fixed on the inner wall of the top end of the branch tube 1, an inner rod 13 is slidably sleeved in the outer tube 12, the bottom end of the inner rod 13 is fixedly connected to the top of the insulating plate 4, and both sides of the top of the insulating plate 4 are fixedly connected with compression springs 14 in a compressed state, and the compression springs 14 are movably sleeved on the outer sides of the corresponding outer tube 12 and inner rod 13; the outer tube 12, inner rod 13 and compression spring 14 are arranged to cooperate, and the elastic force of the compression spring 14 is used to elastically tighten the insulating plate 4 and drive it downward, and the inner rod 13 is combined with the corresponding outer tube 12 to realize the vertical guidance of the insulating plate 4.

[0026] Furthermore, the threaded lifting and pressure regulating assembly includes an externally threaded tube 9 rotatably embedded on the inner wall of the top end of the branch tube 1, wherein a circular hole is provided on the inner wall of the top end of the branch tube 1, a bearing is fixedly sleeved in the circular hole, the inner side of the inner ring of the bearing is fixedly connected to the outer side of the externally threaded tube 9, which plays the effect of rotatably installing the externally threaded tube 9, and a lifting plate 11 is threadedly sleeved on the externally threaded tube 9, wherein a threaded hole threadedly connected to the externally threaded tube 9 is provided on the top of the lifting plate 11, and the threaded connection relationship between the externally threaded tube 9 and the threaded hole is utilized to facilitate the effect of driving the lifting plate 11 to move up and down when the externally threaded tube 9 rotates, and the lifting plate 11 is slidably sleeved on two outer tubes 12, wherein the top of the lifting plate 11 has two threads threadedly connected to the corresponding threads, respectively. The vertical guide holes of the sliding sleeve on the outside of the outer tube 12 play the role of guiding the vertical sliding of the outer tube 12. The bottom of the lifting plate 11 is fixedly connected to the top of the two compression springs 14. The tops of both sides of the externally threaded tube 9 are fixedly connected with the handle rod 10 located above the branch tube 1. The copper rod 8 is located in the externally threaded tube 9 and does not contact the inner wall of the externally threaded tube 9. The externally threaded tube 9, the lifting plate 11 and the handle rod 10 are arranged to cooperate. The externally threaded tube 9 is driven to rotate by the handle rod 10. The rotation of the externally threaded tube 9 drives the lifting plate 11 to move downward and compress the compression spring 14 downward, thereby changing the compression degree of the compression spring 14, thereby making it convenient to change the tightening force of the compression spring 14 on the insulating plate 4 according to the clamping force requirements.

[0027] The method of using this embodiment is as follows: when the universal pin needle adapter clamp of the IGBT power module is used, first pull the annular structure on the upper part of the copper rod 8 upward to drive the insulating plate 4 to move upward, and the insulating plate 4 drives the two inner rods 13 to slide upward in the two outer tubes 12, and compresses the two compression springs 14. The insulating plate 4 drives the four arc-shaped elastic claws 5 to move upward through the copper plate 7 to relax the extrusion force generated by the inner wall of the conical sleeve 3. At this time, the four arc-shaped elastic claws 5 in the inwardly tightened state automatically rebound and expand outward, so that a space for the pin needle body to penetrate is generated between the four. At this time, the conical sleeve 3 is downwardly placed on the pin needle body, and then the pulling force on the annular structure on the upper part of the copper rod 8 is relaxed. At this time, the compression force The elastic force of the compression spring 14 in the contracted state drives the insulating plate 4 to move downward, and the insulating plate 4 drives the four arc-shaped elastic claws 5 to move downward through the copper plate 7. When the four arc-shaped elastic claws 5 move downward, they drive the four balls 6 to roll downward along the inner wall of the conical sleeve 3, and are limited by the conical shape of the conical sleeve 3 to shrink inward when moving downward, so as to drive the four arc-shaped elastic claws 5 to tighten and shrink inward to perform clamping work, wherein the serrated structure on the arc-shaped elastic claws 5 can enhance the anti-slip performance during clamping, so as to improve the stability during clamping, so that it is convenient to clamp the pin needle body quickly and conveniently by simply pulling and releasing, and compared with the existing method that requires multiple rotations and is prone to hand slippage, it effectively improves the convenience and efficiency of operation;

[0028] When the reinforcement state needs to be released later, the annular structure on the upper part of the copper rod 8 is pulled upward again to drive the insulating plate 4 to move upward. Similarly, the movement process of the insulating plate 4 moving upward is the same as the above, so that the four arc-shaped elastic claws 5 rebound and expand outward again, and the reinforcement state can be released. Then, the conical sleeve 3 can be moved upward to separate it from the pin needle body, so that personnel can easily and quickly perform the unfastening operation by simply pulling;

[0029] When the clamping force cannot meet the use requirements and the clamping force needs to be adjusted, the personnel can rotate the handle bar 10 forward to drive the external threaded tube 9 to rotate. The rotation of the external threaded tube 9 drives the lifting plate 11 to slide downward on the outer tube 12 and compress the compression spring 14 downward, thereby changing the compression degree of the compression spring 14, and then changing the initial tightening elastic force of the insulating plate 4, so as to change the clamping force formed by the four arc-shaped elastic claws 5, so that it is convenient to adjust the clamping force according to the use requirements, so as to further improve the stability during clamping, and the clamping force only needs to be adjusted once regularly to avoid the phenomenon that the elastic fatigue of the compression spring 14 cannot meet the stable clamping due to long-term use;

[0030] The arc-shaped elastic claw 5, the copper plate 7 and the copper rod 8 are fixedly connected in sequence to achieve a stable integration with the pin needle body during clamping, ensuring the stability of the connection between the upper part of the copper rod 8 and the pin needle body when the external wire is connected.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A universal pin adapter fixture for an IGBT power module, comprising a pin body and a pin adapter fixture body, wherein the pin adapter fixture body comprises a conical sleeve (3) and a branch pipe (1) fixedly connected to the top thereof, wherein the pin body is located in the conical sleeve (3), and wherein: The top of the branch pipe (1) is configured as a blocking structure, the top of the branch pipe (1) is fixedly connected to a U-shaped handle (2), two telescopic vertical missile support assemblies are embedded and fixed on the inner wall of the top of the branch pipe (1), the bottom ends of the two telescopic vertical missile support assemblies are fixedly connected to the same insulating plate (4), the bottom of the insulating plate (4) is embedded and fixed with a copper plate (7), the bottom four sides of the copper plate (7) are fixedly connected with arc-shaped elastic claws (5) in an inwardly tightened state, the two opposite arc-shaped elastic claws (5) are symmetrically arranged, and the repelling sides of the two opposite arc-shaped elastic claws (5) are movably embedded with a ball (6) that is in movably contact with the inner side of the conical sleeve (3), the top of the copper plate (7) is fixedly connected to a copper rod (8), the top of the copper rod (8) extends into the U-shaped handle (2) and is configured as a circular ring structure; A threaded lifting and pressure regulating component is rotatably embedded on the inner wall of the top end of the branch pipe (1), and the threaded lifting and pressure regulating component is movably sleeved on the two telescopic vertical missile branch components.

2. A universal pin transfer fixture for IGBT power modules according to claim 1, characterized in that: The telescopic vertical missile support assembly comprises an outer tube (12) embedded and fixed on the inner wall of the top end of the branch tube (1); an inner rod (13) is slidably sleeved inside the outer tube (12); the bottom end of the inner rod (13) is fixedly connected to the top of the insulating plate (4); both sides of the top of the insulating plate (4) are fixedly connected with compression springs (14) in a compressed state; the compression springs (14) are movably sleeved on the outer sides of the corresponding outer tube (12) and inner rod (13).

3. A universal pin transfer fixture for IGBT power module according to claim 2, characterized in that: The threaded lifting and pressure regulating assembly comprises an externally threaded tube (9) rotatably embedded on the inner wall of the top end of the branch tube (1); a lifting plate (11) is threadedly sleeved on the externally threaded tube (9); the lifting plate (11) is slidably sleeved on two external tubes (12); the bottom of the lifting plate (11) is fixedly connected to the top ends of two compression springs (14); the top ends of both sides of the externally threaded tube (9) are fixedly connected to handle bars (10) located above the branch tube (1); and the copper rod (8) is located inside the externally threaded tube (9) and does not contact the inner wall of the externally threaded tube (9).

4. The universal pin transfer fixture for IGBT power module according to claim 1, characterized in that: The pin body is located between the four arc-shaped elastic claws (5) and is in tight contact with the four arc-shaped elastic claws (5).

5. The universal pin transfer fixture for IGBT power module according to claim 1, characterized in that: The adjacent sides of the two opposite arc-shaped elastic claws (5) are both arranged as sawtooth structures.

6. The universal pin transfer fixture for IGBT power module according to claim 1, characterized in that: The conical sleeve (3) is made of hard plastic insulating material.

7. The universal pin transfer fixture for IGBT power module according to claim 3, characterized in that: The top of the lifting plate (11) is provided with a threaded hole which is threadedly connected to the external threaded pipe (9).

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