An IGBT bottom guard plate flatness detection device

Abstract

The present invention relates to the technical field of flatness detection, and discloses an IGBT bottom guard plate flatness detection device, including a conveyor belt, and further including: a U-shaped frame, the inner sides of the two vertical sides of the U-shaped frame are respectively fixedly installed on the opposite sides of the conveyor belt; a detection component, the detection component is used for detecting the flatness of the IGBT bottom guard plate; a driving component, the driving component is used for driving the detection component to work; a placement and protection component, the placement and protection component is arranged on the conveyor belt and the U-shaped frame, and the placement and protection component is used for placing the IGBT bottom guard plate and protecting it during detection. The present invention can, when detecting the IGBT bottom guard plate, make brushes and paper tapes of different colors contact according to the lifting of the detection head, so as to draw lines of different colors on the paper tape when the IGBT bottom guard plate is concave or convex, and can, according to the position and color of the drawn lines on the paper tape, timely and accurately perform corresponding processing on the IGBT bottom guard plate, thereby improving the detection effect of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of flatness detection, and particularly relates to a flatness detection device for an IGBT bottom guard plate. Background Art

[0002] ‌The IGBT bottom guard plate‌ is an important component in power electronic devices. The IGBT bottom guard plate is a protection device installed under the IGBT module. The main function of the IGBT bottom guard plate is to provide stable electrical connection and effective heat dissipation support, to protect the IGBT module from damage by the external environment. The IGBT bottom guard plate is usually made of materials such as copper.

[0003] For example, a flatness detection device for a stamped metal plate disclosed in the patent with the publication number CN113458010B can detect the flatness of the material through a detection pen. However, during the detection, it not only does not have the function of protecting the material, but also the detection result display is not intuitive enough, reducing the judgment of the detection result after detection. Therefore, there is an urgent need to design a flatness detection device for an IGBT bottom guard plate. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a flatness detection device for an IGBT bottom guard plate.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A flatness detection device for an IGBT bottom guard plate includes a conveyor belt, and further includes:

[0007] A U-shaped frame, the inner sides of the two vertical sides of the U-shaped frame are respectively fixedly installed on the opposite sides of the conveyor belt;

[0008] A detection component, the detection component is arranged under the horizontal side of the U-shaped frame, and the detection component is used to detect the flatness of the IGBT bottom guard plate;

[0009] A driving component, the driving component is arranged on the U-shaped frame, and the driving component is used to drive the detection component to work;

[0010] A placement and protection component, the placement and protection component is arranged on the conveyor belt and the U-shaped frame, and the placement and protection component is used to place the IGBT bottom guard plate and protect it during detection.

[0011] As a further technical solution of the present invention, the detection component includes: a connecting plate, which is horizontally arranged below the horizontal side of the U-shaped frame. A main spring rod and a vertical plate are vertically and fixedly installed at the bottom of the connecting plate. The fixed end and the telescopic end of the main spring rod are slidably connected by a spline. A round table-shaped detection head is installed at the end of the telescopic end of the main spring rod. A clamp for clamping its telescopic rod is installed on the fixed end of the main spring rod. A box body is fixedly installed at the end of the vertical plate. A collar is fixedly sleeved on the surface of the telescopic end of the main spring rod.

[0012] As a further technical solution of the present invention, the side surface of the box body is rotatably installed on a turntable. A first movable rod is rotatably installed on the outer edge of the side surface of the turntable away from the box body. The end of the first movable rod away from the turntable is rotatably installed on the collar. A large gear and a small gear that mesh with each other are rotatably installed inside the box body. The side surface of the turntable is fixedly installed at the center of the side surface of the large gear through a connecting shaft. The large gear is a split gear. A rotating rod is rotatably installed on the side surface of the box body away from the turntable. The side surface of the rotating rod is fixedly installed at the center of the side surface of the small gear through a connecting shaft. There is friction between the small gear and the inside of the box body.

[0013] As a further technical solution of the present invention, two discs are rotatably sleeved on the surface of the rotating rod. A dial is fixedly installed on the surface of the rotating rod. The dial is located between the two discs. Side plates are fixedly installed on the opposite side surfaces of the two discs. The two side plates are symmetrically arranged. The dial is located between the two side plates. Horizontal plates are horizontally arranged above the two discs. Second movable rods are rotatably installed at the bottoms of the two horizontal plates. The two second movable rods are symmetrically arranged. The ends of the two second movable rods are respectively rotatably installed on the opposite side surfaces of the two discs.

[0014] As a further technical solution of the present invention, a groove plate is vertically and fixedly installed on the side surface of the vertical plate. A Y-shaped groove is formed on the side surface of the groove plate. Two symmetrically arranged sliding columns are slidably installed inside the Y-shaped groove. Two symmetrically arranged detection blocks are slidably arranged on the side surface of the groove plate. The ends of the two sliding columns are respectively fixedly installed on the side surfaces of the two detection blocks. Paintbrushes are vertically installed on the tops of the two detection blocks. The colors of the two paintbrushes are different.

[0015] As a further technical solution of the present invention, first telescopic rods are vertically and fixedly installed on the tops of the two horizontal plates. The telescopic ends of the two first telescopic rods are fixedly installed at the bottom of the groove plate. Third spring rods are horizontally and fixedly installed on the side surfaces of the two detection blocks away from each other. The fixed end and the telescopic end of each third spring rod are connected by a spline. A vertical column is vertically and fixedly installed at the bottom of each third spring rod away from the detection block. The ends of the two vertical columns are respectively fixedly installed on the tops of the two horizontal plates.

[0016] As a further technical solution of the present invention, the driving assembly includes: an adapter plate horizontally arranged below the horizontal side of the U-shaped frame. A telescopic electric rod is vertically installed at the top of the horizontal side of the U-shaped frame, and the output end of the telescopic electric rod is installed at the top of the adapter plate. A first electric slide is horizontally installed at the bottom of the adapter plate, and a second electric slide is longitudinally installed at the bottom of the output end of the first electric slide. The output end of the second electric slide is fixedly installed at the top of the connecting plate.

[0017] As a further technical solution of the present invention, two symmetrically arranged limit plates are fixed at both ends of the side of the second electric slide. Round rollers are rotatably installed at the end parts of the sides of the two limit plates. A limit post is also rotatably installed on each limit plate. A paper tape is wound around the two round rollers. The paper tape passes through the two limit posts. The lower horizontal side of the paper tape is located above the groove plate. A driving motor is installed on the corresponding side of the limit plate, and the output shaft of the driving motor is installed at the center of the side of the corresponding round roller.

[0018] As a further technical solution of the present invention, the placing and protecting assembly includes: a plurality of first spring rods. The plurality of first spring rods are evenly distributed on the surface of the conveyor belt. The fixed end and the telescopic end of each first spring rod are slidably connected by splines. A placing table is fixedly installed at the telescopic end of each first spring rod.

[0019] As a further technical solution of the present invention, a frame body is horizontally and fixedly installed on the side of the U-shaped frame. The frame body is horizontally arranged below the horizontal side of the U-shaped frame. A transparent protective film is horizontally and fixedly installed inside the frame body. A lifting plate is horizontally arranged below the frame body. Two extension plates are slidably arranged on the corresponding vertical sides of the U-shaped frame. Two vertical grooves are formed on the corresponding vertical sides of the U-shaped frame. The end parts of the two extension plates respectively pass through the two vertical grooves, and the end parts of the two extension plates are respectively fixedly installed on the side of the adapter plate and the side of the lifting plate. The surfaces of the two extension plates are respectively slidably installed inside the two vertical grooves. A T-shaped column is horizontally and fixedly installed on the corresponding side of the U-shaped frame. A sleeve block is slidably sleeved on the surface of the T-shaped column. Two rotating plates are rotatably installed on the corresponding sides of the sleeve block. The other two ends of the two rotating plates are respectively rotatably installed on the opposite sides of the two extension plates.

[0020] The beneficial effects of the present invention are as follows:

[0021] First, in the present invention, through the settings of the detection assembly and the driving assembly, when detecting the IGBT bottom guard plate, different colored paintbrushes can be made to contact the paper tape according to the lifting of the detection head, so as to draw lines of different colors on the paper tape when the IGBT bottom guard plate is concave or convex. And according to the position and color of the drawn lines on the paper tape, the IGBT bottom guard plate can be processed correspondingly in a timely and accurate manner, thereby improving the detection effect of the device.

[0022] Second, in the present invention, through the arrangement of the protection component and the driving component, it is possible to protect the IGBT bottom protection plate made of copper, avoiding the situation that the detection head directly slides on the IGBT bottom protection plate, resulting in scratching of the IGBT bottom protection plate made of copper and affecting its use, thereby improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of an IGBT bottom protection plate flatness detection device proposed by the present invention;

[0024] Figure 2 is a schematic structural diagram of the IGBT bottom protection plate flatness detection device proposed by the present invention after removing the conveyor belt;

[0025] Figure 3 is a schematic cross-sectional structural diagram of the U-shaped frame of the IGBT bottom protection plate flatness detection device proposed by the present invention;

[0026] Figure 4 is a schematic structural diagram of the IGBT bottom protection plate flatness detection device proposed by the present invention after removing the U-shaped frame;

[0027] Figure 5 is a schematic structural diagram of the second sliding and paper tape connection of the IGBT bottom protection plate flatness detection device proposed by the present invention;

[0028] Figure 6 is a schematic structural diagram of the box body and its connection of the IGBT bottom protection plate flatness detection device proposed by the present invention;

[0029] Figure 7 is Figure 6 an enlarged schematic diagram of part A in

[0030] Figure 8 is a schematic cross-sectional structural diagram of the box body of the IGBT bottom protection plate flatness detection device proposed by the present invention.

[0031] In the figure: 1, conveyor belt; 2, placement table; 3, first spring rod; 4, U-shaped frame; 5, electric telescopic rod; 6, connecting plate; 7, extension plate; 8, T-shaped column; 9, rotating plate; 10, sleeve block; 11, first electric sliding table; 12, second electric sliding table; 13, frame; 14, lifting plate; 15, connecting plate; 16, main spring rod; 17, fixture; 18, collar; 19, turntable; 20, first movable rod; 21, box body; 22, vertical plate; 23, round roller; 24, limit column; 25, limit plate; 26, paper tape; 27, rotating rod; 28, dialing plate; 29, disc; 30, side plate; 31, second movable rod; 32, cross plate; 33, first telescopic rod; 34, groove plate; 35, column; 36, third spring rod; 37, detection block; 38, paintbrush; 39, Y-shaped groove; 40, large gear; 41, small gear; 42, sliding column. Detailed implementation manners

[0032] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Please refer to the attached Figure 1 - attached Figure 8 , an IGBT bottom guard plate flatness detection device, including a conveyor belt 1, and further including: a U-shaped frame 4, a detection component, a driving component, and a placement and protection component. The inner sides of the two vertical sides of the U-shaped frame 4 are respectively fixedly installed on the opposite sides of the conveyor belt 1. The detection component is arranged below the horizontal side of the U-shaped frame 4, and the detection component is used to detect the flatness of the IGBT bottom guard plate. The driving component is arranged on the U-shaped frame 4, and the driving component is used to drive the detection component to work. The placement and protection component is arranged on the conveyor belt 1 and the U-shaped frame 4, and the placement and protection component is used to place the IGBT bottom guard plate and protect it during detection;

[0035] As described above, when detecting the IGBT bottom guard plate, the paintbrush 38 of different colors can be brought into contact with the paper tape 26 according to the lifting of the detection head, so that when the IGBT bottom guard plate is concave or convex, different color lines can be drawn on the paper tape 26, making the detection result clear and intuitive.

[0036] Please refer to the attached Figure 1 - attached Figure 8, in a preferred embodiment, the detection assembly includes: a connecting plate 15, which is horizontally arranged below the horizontal side of the U-shaped frame 4. A main spring rod 16 and a vertical plate 22 are vertically and fixedly installed at the bottom of the connecting plate 15. The fixed end and the telescopic end of the main spring rod 16 are slidably connected by a spline. A round table-shaped detection head is installed at the end of the telescopic end of the main spring rod 16. A clamp 17 for clamping its telescopic rod is installed on the fixed end of the main spring rod 16. A box body 21 is fixedly installed at the end of the vertical plate 22. A collar 18 is fixedly sleeved on the surface of the telescopic end of the main spring rod 16. The side surface of the box body 21 is rotatably installed on a turntable 19. The outer edge of the side surface of the turntable 19 away from the box body 21 is rotatably installed with a first movable rod 20. The end of the first movable rod 20 away from the turntable 19 is rotatably installed on the collar 18. A large gear 40 and a small gear 41 that mesh with each other are rotatably installed inside the box body 21. The side surface of the turntable 19 is fixedly installed at the center of the side surface of the large gear 40 through a connecting shaft. The large gear 40 is a missing gear. A rotating rod 27 is rotatably installed on the side surface of the box body 21 away from the turntable 19. The side surface of the rotating rod 27 is fixedly installed at the center of the side surface of the small gear 41 through a connecting shaft. There is friction between the small gear 41 and the inside of the box body 21, which ensures the stability of the drawing of the paintbrush 38. Two discs 29 are rotatably sleeved on the surface of the rotating rod 27. A dial 28 is fixedly installed on the surface of the rotating rod 27. The dial 28 is located between the two discs 29. Side plates 30 are fixedly installed on the opposing side surfaces of the two discs 29. The two side plates 30 are symmetrically arranged. The dial 28 is located between the two side plates 30. Horizontal plates 32 are horizontally arranged above the two discs 29. Second movable rods 31 are rotatably installed at the bottoms of the two horizontal plates 32. The two second movable rods 31 are symmetrically arranged. The ends of the two second movable rods 31 are respectively rotatably installed on the opposing side surfaces of the two discs 29. A groove plate 34 is vertically and fixedly installed on the side surface of the vertical plate 22. A Y-shaped groove 39 is formed on the side surface of the groove plate 34. Two symmetrically arranged sliding columns 42 are slidably installed inside the Y-shaped groove 39. Two symmetrically arranged detection blocks 37 are slidably arranged on the side surface of the groove plate 34. The ends of the two sliding columns 42 are respectively fixedly installed on the side surfaces of the two detection blocks 37. Paintbrushes 38 are vertically installed on the tops of the two detection blocks 37. The colors of the two paintbrushes 38 are different. First telescopic rods 33 are vertically and fixedly installed on the tops of the two horizontal plates 32. The telescopic ends of the two first telescopic rods 33 are fixedly installed at the bottom of the groove plate 34. Third spring rods 36 are horizontally and fixedly installed on the side surfaces of the two detection blocks 37 away from each other. The fixed end and the telescopic end of each third spring rod 36 are connected by a spline. A vertical column 35 is vertically and fixedly installed at the bottom of each third spring rod 36 away from the detection block 37. The ends of the two vertical columns 35 are respectively fixedly installed on the tops of the two horizontal plates 32;

[0037] Preferably, when the detection head crosses an uneven position, the elastic force generated by the main spring rod 16 or the supporting force of the IGBT bottom guard plate on the detection head will cause the detection head to return to the normal height. Then, the large gear 40 will drive the small gear 41 to rotate and reset, which can further reset components such as the paintbrush 38, and thus complete the detection of the uneven position of the IGBT bottom guard plate. The two paintbrushes 38 draw different lines, such as drawing a red line at the sunken position and a green line at the protruding position.

[0038] Please refer to the attached Figure 1 - attached Figure 6 , in a preferred embodiment, the driving assembly includes: an adapter plate 6, which is horizontally arranged below the horizontal side of the U-shaped frame 4. A telescopic electric rod 5 is vertically installed at the top of the horizontal side of the U-shaped frame 4, and the output end of the telescopic electric rod 5 is installed at the top of the adapter plate 6. A first electric slide 11 is horizontally installed at the bottom of the adapter plate 6. A second electric slide 12 is longitudinally installed at the bottom of the output end of the first electric slide 11, and the output end of the second electric slide 12 is fixedly installed at the top of the connecting plate 15. Two symmetrically arranged limiting plates 25 are fixed at both ends of the side of the second electric slide 12. A round roller 23 is rotatably installed at the end of the side of each limiting plate 25. A limiting post 24 is also rotatably installed on each limiting plate 25. A paper tape 26 is wound around the two round rollers 23, and the paper tape 26 passes through the two limiting posts 24. The lower horizontal side of the paper tape 26 is located above the groove plate 34. A driving motor is installed on the side of the corresponding limiting plate 25, and the output shaft of the driving motor is installed at the center of the side of the corresponding round roller 23;

[0039] Specifically, it can drive the main spring rod 16 and the detection head to move on the protective film to realize the detection of any position on the IGBT bottom guard plate.

[0040] Please refer to the attached Figure 2 - attached Figure 8, in a preferred embodiment, the placement protection component includes: a plurality of first spring rods 3, which are evenly distributed on the surface of the conveyor belt 1. The fixed ends and telescopic ends of each of the plurality of first spring rods 3 are slidably connected by splines. A placement platform 2 is fixedly installed at the telescopic end of each first spring rod 3. A frame 13 is horizontally and fixedly installed on the side surface of the U-shaped frame 4. The frame 13 is horizontally arranged below the horizontal side of the U-shaped frame 4. A transparent protective film is horizontally and fixedly installed inside the frame 13. A lifting plate 14 is horizontally arranged below the frame 13. Two extension plates 7 are slidably arranged corresponding to the vertical sides of the U-shaped frame 4. Two vertical grooves are formed corresponding to the vertical sides of the U-shaped frame 4. The end portions of the two extension plates 7 respectively pass through the two vertical grooves, and the end portions of the two extension plates 7 are respectively fixedly installed on the side surface of the connecting plate 6 and the side surface of the lifting plate 14. The surfaces of the two extension plates 7 are respectively slidably installed inside the two vertical grooves. A T-shaped column 8 is horizontally and fixedly installed on the corresponding side surface of the U-shaped frame 4. A sleeve block 10 is slidably sleeved on the surface of the T-shaped column 8. Two rotating plates 9 are rotatably installed on the corresponding side surfaces of the sleeve block 10. The other two ends of the two rotating plates 9 are respectively rotatably installed on the opposite side surfaces of the two extension plates 7;

[0041] Furthermore, the movement of the main spring rod 16 drives the detection head to move on the protective film, and the detection head does not directly contact the IGBT bottom protection plate made of copper, avoiding the occurrence of scratches on the IGBT bottom protection plate made of copper.

[0042] The working principle of the present invention: First, place the IGBT bottom protection plate on the placement platform 2. It should be noted that after the IGBT bottom protection plate is placed, it is flush with the placement platform 2. Then start the conveyor belt 1 to drive the placement plate and the IGBT bottom protection plate to move below the U-shaped frame 4 through the first spring rod 3;

[0043] Then start the electric telescopic rod 5 to drive the connecting plate 6 to move downward. The downward movement of the connecting plate 6 drives the first electric slide table 11, the second electric slide table 12 and the connected extension plate 7 to move. The movement of the extension plate 7 drives the connected rotating plate 9 to move. The movement of the rotating plate 9 drives the sleeve block 10 to move. The movement of the sleeve block 10 drives the other rotating plate 9 and the extension plate 7 to move. The movement of the extension plate 7 drives the lifting plate 14 to move downward. The downward movement of the lifting plate 14 drives the placement platform 2 above it to move upward, so as to realize the contact between the placement platform 2 and the transparent protective film on the frame 13. The movement of the second electric slide table 12 drives the connecting plate 15 to move downward. The downward movement of the connecting plate 15 drives the main spring rod 16 and the vertical plate 22 to move downward until the detection head at the end of the main spring rod 16 contacts the protective film. It should be noted that the placement platform 2 and the main spring rod 16 move synchronously to realize the attachment of the protective film to the IGBT bottom protection plate. Then release the fixation of the telescopic end of the main spring rod 16 by the clamp 17;

[0044] Next, the second electric slide table 12 drives the connecting plate 15, the main spring rod 16 and the vertical plate 22 to move horizontally. The movement of the main spring rod 16 drives the detection head to move on the protective film. The detection head will not directly contact the IGBT bottom protection plate made of copper, avoiding scratches on the IGBT bottom protection plate made of copper. When the IGBT bottom protection plate is uneven and has concavities and convexities, the detection head will move up and down. The up and down movement of the detection head drives the telescopic end of the main spring rod 16 to move up and down. The up and down movement of the telescopic end of the main spring rod 16 drives the collar 18 to move up and down. The up and down movement of the collar 18 drives the first movable rod 20 to move. The movement of the first movable rod 20 drives the turntable 19 to rotate. It should be noted that when the telescopic end of the main spring rod 16 moves up and down, the rotation direction of the turntable 19 is different. The rotation of the turntable 19 drives the large gear 40 to rotate. The rotation of the large gear 40 drives the small gear 41 to rotate at an accelerated speed. Due to the design of the large gear 40 as a missing gear, the small gear 41 will rotate intermittently. The rotation of the small gear 41 drives the rotating rod 27 to rotate. The rotation of the rotating rod 27 moves the dial 28. Due to the different rotation directions of the turntable 19, the rotation directions of the rotating rod 27 and the dial 28 are also different. When the dial 28 rotates, it will drive the corresponding side plate 30 to move. The movement of the side plate 30 drives the corresponding disc 29 to rotate. The rotation of the disc 29 drives the second movable rod 31 to move. The movement of the second movable rod 31 moves the cross plate 32 upward. The upward movement of the cross plate 32 drives the column 35 to move upward. The upward movement of the column 35 drives the third spring rod 36, the detection block 37 and the paintbrush 38 to move upward. The upward movement of the detection block 37 drives the sliding column 42 to move upward. When the sliding column 42 moves to the hypotenuse of the Y-shaped groove 39, the detection block 37 will move towards the center of the Y-shaped groove 39, and the third spring rod 36 will generate a tensile force. Since the small gear 41 will only rotate a specified angle, further, the paintbrush 38 can be brought into contact with the paper tape 26 and draw a line on the paper tape 26. To sum up, the painting paths of the two paintbrushes 38 are the same, so as to draw lines of different colors on the same path on the paper tape 26, facilitating the staff to intuitively judge the flatness of the IGBT bottom protection plate. When the detection head crosses the uneven position, the elastic force generated by the main spring rod 16 or the supporting force generated by the IGBT bottom protection plate on the detection head will cause the detection head to return to the normal height. Then, the large gear 40 will drive the small gear 41 to rotate and reset, and further, components such as the paintbrush 38 can be reset, thus completing the detection of the uneven position of the IGBT bottom protection plate. The two paintbrushes 38 draw different lines, such as drawing a red line at the sunken position and a green line at the protruding position;

[0045] When it is necessary to detect other positions of the IGBT bottom protection plate, only need to drive the second electric slide table 12, the connecting plate 15 and the components thereon to move horizontally through the first electric slide table 11. Additionally, drive the round roller 23 to rotate through the drive motor, replace the unused paper tape 26, and repeat the above steps to detect other positions of the IGBT bottom protection plate. The detection is convenient and fast, and the detection result is intuitively displayed;

[0046] Finally, after the inspection of the IGBT bottom guard plate is completed, move the inspection head to the edge of the placement table 2 to reset the telescopic end of the main spring rod 16, then clamp the telescopic end of the main spring rod 16 through the fixture 17, and then drive the connecting plate 6 and its connecting components to move upward through the electric telescopic rod 5. In summary, by repeating the above steps in sequence, the IGBT bottom guard plate can be inspected intuitively and safely, thereby improving the use effect of the device.

[0047] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An IGBT bottom guard plate flatness detection device, comprising a conveyor belt (1), characterized in that: Also includes: A U-shaped frame (4), wherein the inner sides of two vertical sides of the U-shaped frame (4) are respectively fixedly mounted on opposite sides of the conveyor belt (1); A detection component, the detection component is arranged below the horizontal side of the U-shaped frame (4), and the detection component is used to detect the flatness of the IGBT bottom guard plate; A driving component, the driving component is arranged on the U-shaped frame (4), and the driving component is used to drive the detection component to work; A placement protection component, the placement protection component is arranged on the conveyor belt (1) and the U-shaped frame (4), and the placement protection component is used to place the IGBT bottom guard plate and protect it during detection; The detection assembly comprises: a connecting plate (15), the connecting plate (15) being horizontally arranged below the horizontal side of the U-shaped frame (4), a main spring rod (16) and a vertical plate (22) being vertically fixedly installed at the bottom of the connecting plate (15), the fixed end and the telescopic end of the main spring rod (16) being slidably connected via a spline, a round table type detection head being installed at the end of the telescopic end of the main spring rod (16), a clamp (17) for clamping the telescopic rod being installed on the fixed end of the main spring rod (16), a box body (21) being fixedly installed at the end of the vertical plate (22), a collar (18) being fixedly sleeved on the surface of the telescopic end of the main spring rod (16), and the box body (21) being rotatably installed on a turntable (19) at a side surface, the turntable (19) being away from the box body (2 A first movable rod (20) is rotatably mounted on the outer edge of the side surface of the housing (1), and the end of the first movable rod (20) away from the rotating disk (19) is rotatably mounted on the collar (18). A large gear (40) and a small gear (41) that mesh with each other are rotatably mounted inside the housing (21). The side surface of the rotating disk (19) is fixedly mounted at the center of the side surface of the large gear (40) via a connecting shaft. The large gear (40) is a missing gear. A rotating rod (27) is rotatably mounted on the side surface of the housing (21) away from the rotating disk (19). The side surface of the rotating rod (27) is fixedly mounted at the center of the side surface of the small gear (41) via a connecting shaft. There is friction between the small gear (41) and the inside of the housing (21). Two discs are rotatably sleeved on the surface of the rotating rod (27). (29), a dial plate (28) is fixedly mounted on the surface of the rotating rod (27), the dial plate (28) is located between the two disks (29), side plates (30) are fixedly mounted on opposite sides of the two disks (29), the two side plates (30) are symmetrically arranged at the center, the dial plate (28) is located between the two side plates (30), a horizontal plate (32) is horizontally arranged above the two disks (29), the bottom of the two horizontal plates (32) are rotatably mounted with second movable rods (31), the two second movable rods (31) are symmetrically arranged at the center, the ends of the two second movable rods (31) are rotatably mounted on the opposite sides of the two disks (29), and a slot plate (34) is vertically fixedly mounted on the side of the vertical plate (22). A Y-shaped groove (39) is provided on the side of the groove plate (34), and two symmetrically arranged sliding columns (42) are slidably installed inside the Y-shaped groove (39). Two symmetrically arranged detection blocks (37) are slidably installed on the side of the groove plate (34), and the ends of the two sliding columns (42) are respectively fixedly installed on the sides of the two detection blocks (37). A paintbrush (38) is vertically installed on the top of the two detection blocks (37), and the two paintbrushes (38) are of different colors. A first telescopic rod (33) is vertically fixedly installed on the top of the two horizontal plates (32), and the telescopic ends of the two first telescopic rods (33) are fixedly installed on the bottom of the groove plate (34). A third spring rod (36) is horizontally fixedly installed on the sides away from the two detection blocks (37).The fixed end and the telescopic end of each third spring rod (36) are connected by a spline, and a column (35) is vertically fixedly installed at the bottom of one end of each third spring rod (36) away from the detection block (37), and the ends of the two columns (35) are respectively fixedly installed on the tops of the two horizontal plates (32).

2. The IGBT bottom guard plate flatness detection device according to claim 1, characterized in that: The driving assembly comprises: a connecting plate (6), the connecting plate (6) being horizontally arranged below the horizontal side of the U-shaped frame (4), an electric telescopic rod (5) being vertically installed on the top of the horizontal side of the U-shaped frame (4), an output end of the electric telescopic rod (5) being installed on the top of the connecting plate (6), a first electric slide (11) being horizontally installed on the bottom of the connecting plate (6), a second electric slide (12) being longitudinally installed on the bottom of the output end of the first electric slide (11), and an output end of the second electric slide (12) being fixedly installed on the top of the connecting plate (15).

3. The IGBT bottom guard plate flatness detection device according to claim 2, characterized in that: Two symmetrically arranged limit plates (25) are fixed at both ends of the side of the second electric slide (12), and round rollers (23) are rotatably mounted on the side ends of the two limit plates (25). A limit column (24) is also rotatably mounted on each of the limit plates (25). Paper tapes (26) are wound around the two round rollers (23), and the paper tapes (26) pass through the two limit columns (24). The lower horizontal edge of the paper tape (26) is located above the groove plate (34). A driving motor is mounted on the side of the corresponding limit plate (25), and the output shaft of the driving motor is mounted at the center of the side of the corresponding round roller (23).

4. The IGBT bottom guard plate flatness detection device according to claim 3, characterized in that: The placement protection component comprises: a first spring rod (3), a plurality of the first spring rods (3), the plurality of the first spring rods (3) being evenly distributed on the surface of the conveyor belt (1), a fixed end and a telescopic end of each first spring rod (3) being slidably connected via a spline, and a placement platform (2) being fixedly mounted on the telescopic end of each first spring rod (3).

5. The IGBT bottom guard plate flatness detection device according to claim 4, characterized in that: A frame (13) is fixedly installed horizontally on the side of the U-shaped frame (4). The frame (13) is horizontally arranged below the horizontal side of the U-shaped frame (4). A transparent protective film is fixedly installed horizontally inside the frame (13). A lifting plate (14) is horizontally arranged below the frame (13). Two extension plates (7) are slidably installed on the corresponding vertical sides of the U-shaped frame (4). Two vertical grooves are opened on the corresponding vertical sides of the U-shaped frame (4). The ends of the two extension plates (7) pass through the two vertical grooves respectively, and the ends of the two extension plates (7) are fixedly installed on the side of the connecting plate (6) and the side of the lifting plate (14). The surfaces of the two extension plates (7) are slidably installed in the two vertical grooves respectively. A T-shaped column (8) is fixedly installed horizontally on the corresponding side of the U-shaped frame (4). A sleeve block (10) is slidably sleeved on the surface of the T-shaped column (8). Two rotating plates (9) are rotatably installed on the corresponding sides of the sleeve block (10). The other two ends of the two rotating plates (9) are rotatably installed on the opposite sides of the two extension plates (7).

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