Bottom guard plate tensile testing machine

Abstract

The present invention discloses a bottom guard plate tensile testing machine, which is applied to the technical field of bottom guard plate tensile testing, wherein the transmission assembly includes a long plate arranged on the lower shell, the transmission assembly and the clamping assembly are both provided with two groups, which are respectively located on both sides of the long plate, the transmission assembly includes a mounting plate 1 fixed on one side of the long plate, a sliding seat slidably connected to the long plate, a first drive is fixed on one side of the mounting plate 1, mounting plates 2 are fixed on both sides of the middle of the long plate, a threaded rod 1 is connected with a bearing between the mounting plate 1 and the mounting plate 2, the first drive is fixedly connected to the threaded rod 1, and the sliding seat is threadedly connected to the threaded rod 1. The device solves the current problem of stretching the bottom guard plate when detecting the strength of the bottom guard plate, detecting the strength when the bottom guard plate is stretched, so that the detection is more accurate and the detection quality can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of bottom guard plate tensile testing, and in particular relates to a bottom guard plate tensile testing machine. Background Art

[0002] With the development of automobile technology, users' use scenarios of automobiles have become diversified, and at the same time, the driving distance has become more and more demanding. The car underbody guard can effectively prevent the impact of road stones and impurities on the car chassis parts, extend the service life, and reduce after-sales quality problems.

[0003] Therefore, it is necessary to test the strength and quality of the bottom guard plate after production. However, the existing testing method cannot test the strength when the bottom guard plate is stretched, so the test is not accurate. Therefore, a bottom guard plate stretching testing machine is provided. When testing the strength of the bottom guard plate, the bottom guard plate is stretched and the strength is tested when the bottom guard plate is stretched, so that the test is more accurate and the test quality can be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above-mentioned background technology by targeting the existing skidding device bottom guard plate tensile testing machine.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a bottom guard plate tensile testing machine, comprising a lower shell;

[0006] an upper shell fixed to a lower shell;

[0007] A support frame is arranged in the lower shell and the upper shell, and the support frame is used to stabilize the upper shell and the lower shell, wherein:

[0008] A top plate is fixed on the top of the upper shell, a control panel is arranged on one side of the lower shell, the support frame is formed by metal rods, two groups of connecting rods are fixed in the middle of the support frame, and a second camera is fixed on the inner wall of the upper shell;

[0009] It also includes a stretching mechanism disposed on the lower shell, for stretching the bottom guard plate, wherein:

[0010] The stretching mechanism includes a transmission assembly arranged on the lower shell, and a clamping assembly arranged on the transmission assembly, wherein the transmission assembly is used to control the movement of the clamping assembly, and the clamping assembly is used to clamp the bottom guard plate;

[0011] It also includes a testing mechanism disposed in the lower shell and the upper shell, for testing the strength of the bottom guard plate, wherein:

[0012] The testing mechanism comprises a moving assembly provided with the lower shell and the upper shell, and an impact assembly provided on the moving assembly, wherein the impact assembly is used to impact the bottom guard plate;

[0013] The transmission assembly includes a long plate arranged on the lower shell, the transmission assembly and the clamping assembly are both provided with two groups, which are respectively located on both sides of the long plate, the transmission assembly includes a mounting plate 1 fixed to one side of the long plate, a sliding seat slidably connected to the long plate, a first drive is fixed to one side of the mounting plate 1, mounting plates 2 are fixed to both sides of the middle of the long plate, a threaded rod 1 is connected with a bearing between the mounting plates 1 and 2, the first drive is fixedly connected to the threaded rod 1, and the sliding seat is threadedly connected to the threaded rod 1;

[0014] The clamping assembly includes a connecting column fixed on the sliding seat, and the connecting column is provided with four groups, which are evenly distributed around the sliding seat, and a connecting plate is fixed on the four groups of connecting columns, and two groups of the second drives are fixed on the top of the connecting plate. A pressing plate is provided under the connecting plate, and the pressing plate is fixedly connected to the output end of the second drive. Rubber skin is fixed to the top of the sliding seat and the side of the pressing plate away from the first drive, and camera three is fixed to the bottom of the connecting plate.

[0015] The present invention further illustrates that the impact assembly comprises the following operating steps:

[0016] After stretching is completed, the impact speed of the impact column is controlled to be slow to impact the bottom guard plate. After the impact is completed, the impact column is controlled to lift. When the load platform is lifted, camera 1 is used to capture whether there are pits on the surface of the bottom guard plate. Camera 2 on both sides of the upper shell is used to capture the side of the bottom guard plate to determine whether the bottom guard plate is bent. When there are no pits on the surface of the bottom guard plate and the side of the bottom guard plate is not bent, the next step of rapid impact can be performed. When there are pits on the surface of the bottom guard plate or the side of the bottom guard plate is bent, it means that the strength of the bottom guard plate decreases after stretching. At this time, the bottom guard plate needs to be marked.

[0017] The present invention further illustrates that the transmission assembly comprises the following steps:

[0018] The transmission assembly is used to control the clamping assembly to move back to back again, and the bottom guard plate is pulled for the second time, so as to straighten the bent part of the bottom guard plate. After pulling, let it stand for a while, then release the clamping assembly to judge again whether there is still bending on the side of the bottom guard plate. If the bottom guard plate is straightened, it means that the bottom guard plate can enter the next process. If the bottom guard plate is still not straightened, it means that the quality of the bottom guard plate is low and it is reported as a defective product.

[0019] The present invention further illustrates that the transmission assembly further comprises the following steps:

[0020] The photo of the edge of the bottom guard plate clamped between the top of the sliding seat and the pressing plate is taken by camera three and transmitted to the control panel. If it is identified that there is a bend at the edge of the bottom guard plate, the staff will loosen the screws and control the second drive to contract, raise the pressing plate, and then move the bent edge to the bottom of the pressing plate. At this time, the second drive is controlled to extend, and the pressing plate is used to press the bent edge to make its edge smooth.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention adopts a transmission component, can impact the bottom guard plate when stretching the bottom guard plate, comprehensively judge the quality of the bottom guard plate, and can restore the shape of the bottom guard plate through the clamping component and the impact component;

[0022] The clamping assembly is used to control the second drive to contract, lift the pressing plate, and then move the bent edge to the bottom of the pressing plate. At this time, the second drive is controlled to extend, and the pressing plate presses the bent edge to make it flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 The present invention Figure 1 A local enlarged schematic diagram of area A;

[0026] Figure 3 It is a three-dimensional schematic diagram of the internal structure of the present invention;

[0027] Figure 4 It is a front schematic diagram of the overall structure of the present invention;

[0028] Figure 5 The present invention Figure 1 A local enlarged schematic diagram of area B;

[0029] Figure 6 The present invention Figure 4 A schematic diagram of a local enlargement of the C region;

[0030] Figure 7 The present invention Figure 3 A schematic diagram of a local enlargement of the D region;

[0031] Figure 8 It is a two-dimensional schematic diagram of the side of the connecting plate, the pressing plate and the sliding seat of the present invention;

[0032] Fig. 9 The present invention Figure 2 A schematic diagram of a local enlargement of the E region;

[0033] In the figure: 1. lower shell; 2. upper shell; 3. top plate; 4. control panel; 5. long board; 6. mounting plate 1; 7. first drive; 8. sliding seat; 9. connecting column; 10. connecting plate; 11. second drive; 12. threaded rod 1; 13. pressing plate; 14. slide plate; 15. bearing platform; 16. impact column; 17. threaded rod 2; 18. camera 1; 19. support frame; 20. connecting rod; 21. fixing column; 22. positioning plate; 23. reducer; 24. third drive; 25. rubber skin; 26. through hole 2; 27. through hole 1; 28. threaded hole; 29. ​​distance sensor; 30. camera 3. DETAILED DESCRIPTION

[0034] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-9 The present invention provides a technical solution: a bottom guard plate tensile testing machine, comprising a lower shell 1, an upper shell 2 fixed on the lower shell 1, a support frame 19 arranged in the lower shell 1 and the upper shell 2, the support frame 19 is used to stabilize the upper shell 2 and the lower shell 1, a top plate 3 is fixed on the top of the upper shell 2, a control panel 4 is arranged on one side of the lower shell 1, the support frame 19 is composed of metal rods, two groups of connecting rods 20 are fixed in the middle of the support frame 19, and a camera 2 (not shown in the figure) is fixed on the inner wall of the upper shell 2.

[0036] It includes a stretching mechanism arranged on the lower shell 1, which is used to stretch the bottom guard plate. The stretching mechanism includes a transmission assembly arranged on the lower shell 1, and a clamping assembly arranged on the transmission assembly. The transmission assembly is used to control the movement of the clamping assembly, and the clamping assembly is used to clamp the bottom guard plate.

[0037] It includes a testing mechanism arranged in the lower shell 1 and the upper shell 2, which is used to test the strength of the bottom guard plate. The testing mechanism includes a moving component provided with the lower shell 1 and the upper shell 2, the moving component drives the impact component to move up and down, and the impact component arranged on the moving component is used to impact the bottom guard plate.

[0038] The transmission assembly includes a long plate 5 arranged on the lower shell 1, and the transmission assembly and the clamping assembly are both provided with two groups, which are respectively located on both sides of the long plate 5. The transmission assembly includes a mounting plate 16 fixed on one side of the long plate 5, a sliding seat 8 slidably connected to the long plate 5, a first drive 7 is fixed on one side of the mounting plate 16, and mounting plates 2 (not shown in the figure) are fixed on both sides of the middle of the long plate 5. A threaded rod 12 is connected to the mounting plate 16 and the mounting plate 2 by a bearing, the first drive 7 is fixedly connected to the threaded rod 12, and the sliding seat 8 is threadedly connected to the threaded rod 12. Starting the first drive 7 drives the threaded rod 12 to rotate, thereby driving the sliding seat 8 to move horizontally on the long plate 5, thereby driving the clamping assembly to move, thereby pulling the bottom guard plate to both sides;

[0039] A distance sensor 29 is fixed to the side of the sliding seat 8 .

[0040] The clamping assembly includes a connecting column 9 fixed on the sliding seat 8. The connecting column 9 is provided with four groups and evenly distributed around the sliding seat 8. A connecting plate 10 is fixed on the four groups of connecting columns 9. Two groups of second drives 11 are fixed on the top of the connecting plate 10. A pressing plate 13 is provided below the connecting plate 10. The pressing plate 13 is fixedly connected to the output end of the second drive 11. A rubber skin 25 is fixed to the top of the sliding seat 8 and the side of the pressing plate 13 away from the first drive 7. A camera 3 30 is fixed to the bottom of the connecting plate 10. When the bottom guard plate needs to be installed, the two ends of the bottom guard plate are placed above the sliding seat 8. The second drive 11 is started to extend and drive the pressing plate 13 to press the surface of the bottom guard plate. The bottom guard plate is pressed by the top of the sliding seat 8 and the pressing plate 13. The rubber skin 25 can increase the friction between the bottom guard plate and the sliding seat 8 and the pressing plate 13, and at the same time, the surface of the protective plate can be prevented from being deformed by pressure.

[0041] It should be noted that the first drive 7 may be a motor, and the second drive 11 may be a cylinder.

[0042] It should be added that a plurality of threaded holes 28 are provided on the surface of the sliding seat 8, a through hole 1 27 is provided on the pressing plate 13, and a through hole 26 is provided on the connecting plate 10. The through hole 1 27, the through hole 26 and the threaded hole 28 are on the same axis. After the pressing plate 13 and the sliding seat 8 clamp the protective plate, the staff will pass the screw through the through hole 26. At this time, the through hole 1 27 and the threaded hole 28 are matched by the screws to improve the clamping effect of the pressing plate 13 and the sliding seat 8 to clamp the protective plate.

[0043] The moving assembly includes a fixed column 21 fixed on the connecting rod 20, a positioning plate 22 is fixed below the two groups of fixed columns 21, two groups of third drives 24 are fixed on one side of the positioning plate 22, two groups of reducers 23 are fixed at the bottom of the positioning plate 22, the reducer 23 is connected to the output shaft of the third drive 24, the top bearing of the positioning plate 22 is connected to the threaded rod 17, the reducer 23 is connected to the threaded rod 17, the top of the threaded rod 17 is connected to the top plate 3 by a bearing, the third drive 24 is started to drive the threaded rod 17 to rotate through the reducer 23, thereby driving the impact assembly to move up and down;

[0044] The impact assembly includes a bearing platform 15 threadedly connected to the threaded rod 17, slides 14 are fixed at both ends of the bearing platform 15, the slides 14 are slidably connected to the upper shell 2, an impact column 16 is fixed at the bottom of the bearing platform 15, and a camera 18 is fixed on the left and right sides of the bearing platform 15. When the third drive 24 is started, the bearing platform 15 is driven to move up and down by the threaded rod 17, thereby driving the impact column 16 to move. When it is necessary to impact the bottom guard plate, the bearing platform 15 is driven downward, thereby driving the impact column 16 to impact the bottom guard plate to judge the strength of the bottom guard plate.

[0045] It should be added that the third drive 24 is a motor;

[0046] The control panel 4 is electrically connected to the reducer 23 .

[0047] Working principle:

[0048] When the bottom guard plate needs to be inspected, the bottom guard plate is clamped by the clamping assembly. At this time, the transmission assembly is started to move in opposite directions to stretch the bottom guard plate to both sides. When the bottom guard plate is stretched, the moving distance of the sliding seat 8 is detected by the distance sensor 29. Since the moving distance is set to h, the stretching is suspended when the moving distance reaches h.

[0049] After stretching is completed, the third drive 24 is started to drive the threaded rod 17 to rotate through the reducer 23. It should be noted that the staff sets the reducer 23 in the control panel 4 to control the rotation speed of the threaded rod 17, and divides the threaded rod 17 into fast and slow levels. When the rotation speed of the threaded rod 17 is slow, the impact speed of the impact column 16 is slow. When the rotation speed of the threaded rod 17 is fast, the impact speed of the impact column 16 is fast. According to the impact speed of the impact column 16, combined with the situation that the bottom guard plate is stretched, the strength of the bottom guard plate is comprehensively judged.

[0050] Specifically, after the stretching is completed, the impact speed of the impact column 16 is controlled to be a slow level to impact the bottom guard plate. After the impact is completed, the impact column 16 is controlled to be lifted. When the bearing platform 15 is lifted, the camera 18 is used to shoot whether there are pits on the surface of the bottom guard plate. The camera 2 on both sides of the upper shell 2 shoots the side of the bottom guard plate to determine whether the bottom guard plate is bent. When there are no pits on the surface of the bottom guard plate and the side of the bottom guard plate is not bent, the next step of rapid impact can be carried out. When there are pits on the surface of the bottom guard plate or the side of the bottom guard plate is bent, it means that the strength of the bottom guard plate decreases after stretching, and the bottom guard plate needs to be marked at this time.

[0051] Repeat the above steps when performing a rapid impact, and judge again whether there are pits on the surface of the bottom guard plate and whether the side of the bottom guard plate is bent. If there are still no pits on the surface of the bottom guard plate and the side of the bottom guard plate is still not bent, it means that the quality of the bottom guard plate is high. If there are pits on the surface of the bottom guard plate or the side of the bottom guard plate is bent, it means that the quality of the bottom guard plate is low and needs to be handled by the staff;

[0052] When the side of the bottom guard plate is bent, the transmission assembly can be used to control the clamping assembly to move back and forth again, pulling the bottom guard plate for the second time, thereby straightening the bent part of the bottom guard plate. It should be noted that when the transmission assembly controls the clamping assembly to pull the bottom guard plate again, the pulling distance is within the maximum allowable range, so it will not affect the bottom guard plate as a whole. After pulling, let it stand for a while, then release the clamping assembly to determine again whether there is any bending on the side of the bottom guard plate. If the bottom guard plate is straightened, it means that the bottom guard plate can enter the next process. If the bottom guard plate is still not straightened, it means that the quality of the bottom guard plate is low and it is reported as a defective product.

[0053] Through the above steps, the bottom guard plate can be impacted when being stretched, the quality of the bottom guard plate can be comprehensively judged, and the shape of the bottom guard plate can be restored by the clamping assembly.

[0054] Furthermore, since the edge of the bottom guard plate is more often connected to the automobile chassis by bolts, the quality of the edge of the bottom guard plate is also required. After the impact detection is completed, it is determined that the edge of the bottom guard plate where it is clamped may be bent, which makes it difficult to connect and install it with the automobile chassis later. Therefore, it is necessary to determine whether the edge of the bottom guard plate where it is clamped is bent. Specifically, a photo of the edge of the bottom guard plate clamped between the top of the sliding seat 8 and the pressing plate 13 is taken by the camera 30 and transmitted to the control panel 4. If it is determined that there is a bend at the edge of the bottom guard plate (due to the clamping between the top of the sliding seat 8 and the pressing plate 13), the photo is transmitted to the control panel 4. The edge of the bottom guard plate, so the bottom guard plate will be bent), at this time the staff loosens the screws, then controls the second drive 11 to contract, lifts the pressing plate 13, and then moves the bent edge to the bottom of the pressing plate 13. At this time, the second drive 11 is controlled to extend, and the pressing plate 13 is used to press the bent edge to make its edge flat. At this time, the camera three 30 takes a picture of the bend again. If it is restored to its original state, the bottom guard plate can be removed and enter the next process. If it is still not restored to its original state, it means that the degree of bending at the edge is relatively serious, and the staff needs to deal with it to ensure the quality of the later installation of the bottom guard plate and the car chassis.

[0055] To sum up, while pulling the bottom guard plate for the second time, the bent edge can also be pressed flat, which can save working time.

[0056] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0057] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the tensile strength of a bottom guard plate, characterized in that: The method uses a bottom guard plate tensile testing machine, including a lower shell (1); An upper shell (2) fixed on the lower shell (1); A support frame (19) is arranged inside the lower shell (1) and the upper shell (2), and the support frame (19) is used to stabilize the upper shell (2) and the lower shell (1), wherein: A top plate (3) is fixed on the top of the upper shell (2), a control panel (4) is provided on one side of the lower shell (1), the support frame (19) is formed by metal rods, two groups of connecting rods (20) are fixed in the middle of the support frame (19), and a second camera is fixed on the inner wall of the upper shell (2); It also includes a stretching mechanism arranged on the lower shell (1) and used for stretching the bottom guard plate, wherein: The stretching mechanism comprises a transmission assembly arranged on the lower shell (1), and a clamping assembly arranged on the transmission assembly, the transmission assembly being used to control the movement of the clamping assembly, and the clamping assembly being used to clamp the bottom guard plate; It also includes a testing mechanism disposed in the lower shell (1) and the upper shell (2) for testing the strength of the bottom guard plate, wherein: The testing mechanism comprises a moving assembly provided with the lower shell (1) and the upper shell (2), and an impact assembly provided on the moving assembly, wherein the impact assembly is used to impact the bottom guard plate; The transmission assembly comprises a long plate (5) arranged on the lower shell (1), the transmission assembly and the clamping assembly are each provided with two groups, which are respectively located on both sides of the long plate (5), the transmission assembly comprises a mounting plate 1 (6) fixed on one side of the long plate (5), a sliding seat (8) slidably connected to the long plate (5), a first drive (7) is fixed on one side of the mounting plate 1 (6), mounting plates 2 are fixed on both sides of the middle of the long plate (5), a threaded rod 1 (12) is bearing-connected between the mounting plate 1 (6) and the mounting plate 2, the first drive (7) is fixedly connected to the threaded rod 1 (12), and the sliding seat (8) is threadedly connected to the threaded rod 1 (12); The clamping assembly comprises a connecting column (9) fixed on the sliding seat (8), the connecting column (9) is provided in four groups and evenly distributed around the sliding seat (8), a connecting plate (10) is fixed on the four groups of the connecting columns (9), two groups of second drivers (11) are fixed on the top of the connecting plate (10), a pressing plate (13) is provided below the connecting plate (10), the pressing plate (13) is fixedly connected to the output end of the second driver (11), a rubber skin (25) is fixed on the top of the sliding seat (8) and the side of the pressing plate (13) away from the first driver (7), and a camera three (30) is fixed on the bottom of the connecting plate (10); A distance sensor (29) is fixed to the side of the sliding seat (8); The impact assembly comprises a bearing platform (15) threadedly connected to the second threaded rod (17); The test method includes the following steps: The bottom guard plate is clamped by the clamping assembly, and the transmission assembly is started to move in opposite directions, and the bottom guard plate is stretched to both sides. When the bottom guard plate is stretched, the moving distance of the sliding seat 8 is detected by the distance sensor 29. Since the moving distance is set to h, the stretching is stopped when the moving distance reaches h; After the stretching is completed, the impact speed of the impact column (16) is controlled to be slow to impact the bottom guard plate. After the impact is completed, the impact column (16) is controlled to be lifted. When the support platform (15) is lifted, the camera 1 (18) is used to photograph whether there are pits on the surface of the bottom guard plate. The camera 2 on both sides of the upper shell (2) photographs the side of the bottom guard plate to determine whether the bottom guard plate is bent. When there are no pits on the surface of the bottom guard plate and the side of the bottom guard plate is not bent, the next step of rapid impact can be carried out. When there are pits on the surface of the bottom guard plate or the side of the bottom guard plate is bent, it means that the strength of the bottom guard plate decreases after stretching, and the bottom guard plate needs to be marked at this time. The transmission assembly controls the clamping assembly to move back to back again, and the bottom guard plate is pulled for the second time, so as to straighten the bent part of the bottom guard plate. After pulling, let it stand for a while, then release the clamping assembly to judge whether there is still bending on the side of the bottom guard plate. If the bottom guard plate is straightened, it means that the bottom guard plate can enter the next process. If the bottom guard plate is still not straightened, it means that the quality of the bottom guard plate is low and it is reported as defective. The transmission assembly further comprises the following steps: The camera 3 (30) takes a picture of the edge of the bottom guard plate clamped between the top of the sliding seat (8) and the pressing plate (13) and transmits it to the control panel (4). If it is identified that there is a bend at the edge of the bottom guard plate, the staff will loosen the screw and then control the second drive (11) to contract, raise the pressing plate (13), and then move the bent edge to the bottom of the pressing plate (13). At this time, the second drive (11) is controlled to extend, and the bent edge is pressed by the pressing plate (13) to make the edge flat.

2. The bottom guard plate tensile testing machine according to claim 1, characterized in that: A plurality of threaded holes (28) are formed on the surface of the sliding seat (8), a through hole 1 (27) is formed on the pressing plate (13), and a through hole 2 (26) is formed on the connecting plate (10); the through hole 1 (27), the through hole 2 (26) and the threaded hole (28) are coaxial.

3. The bottom guard plate tensile testing machine according to claim 1, characterized in that: The moving assembly comprises a fixing column (21) fixed on a connecting rod (20), a positioning plate (22) is fixed below two groups of the fixing columns (21), two groups of third drives (24) are fixed on one side of the positioning plate (22), two groups of reducers (23) are fixed at the bottom of the positioning plate (22), the reducers (23) are connected to the output shafts of the third drives (24), the top bearing of the positioning plate (22) is connected to a threaded rod (17), the reducer (23) is connected to the threaded rod (17), and the top end of the threaded rod (17) is connected to the top plate (3) by a bearing; The third drive (24) is started to drive the second threaded rod (17) to rotate via the reducer (23), thereby driving the impact assembly to move up and down.

4. The bottom guard plate tensile testing machine according to claim 3, characterized in that: Slide plates (14) are fixed at both ends of the support platform (15), the slide plates (14) are slidably connected to the upper shell (2), an impact column (16) is fixed at the bottom of the support platform (15), and a camera 1 (18) is fixed on the left and right sides of the support platform (15).

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