Automobile frame welding strength detection device

Abstract

The utility model discloses an automobile frame welding strength detection device, which relates to the technical field of frame welding machines, and comprises a base, one side of the base is fixedly connected with two groups of fixing frames, the upper ends of the two groups of fixing frames are fixedly connected with two groups of first sliding rails, the middle part of one group of first sliding rails is provided with a fixed sliding rod, and the other group of first sliding rails is provided with a movable sliding rod. And the middle part of the fixed sliding rod is arranged in the first sliding rail. According to the utility model, the cam is driven by the third servo motor to rotate, the cam rotates to drive the protective shell to move up and down, the protective shell pushes the impact sliding rod to move downwards along the fixed cylinder when moving downwards, and in the downward sliding process of the impact sliding rod, the cam is prevented from falling off in the circular motion process. The collision sliding rod is continuously pushed to move downwards and then move upwards, when the collision sliding rod moves downwards, the collision sliding rod collides with the welding position of the vehicle frame, and therefore multiple times of continuous collision detection are conducted on the vehicle frame through the same force, and detection of the welding strength of the vehicle frame is completed.

Description

Technical Field

[0001] The utility model relates to the technical field of frame welding machines, in particular to a device for detecting the welding strength of an automobile frame. Background Technique

[0002] An automobile frame refers to a rigid framework formed by connecting longitudinal beams and cross beams. Among them, the cross beam is used to ensure the torsional stiffness of the automobile frame to bear longitudinal loads and can also be used to support the main components on the automobile. The welding process is a key process in the production process of the frame.

[0003] When the existing device for detecting the welding strength of a frame is performing detection, it can only perform single detection, cannot continuously detect the welding position of the frame multiple times without interruption, and cannot accurately measure the welding strength of the frame. Content of the Utility Model

[0004] The purpose of the utility model is to solve the deficiencies existing in the prior art and propose a device for detecting the welding strength of an automobile frame.

[0005] To achieve the above object, the utility model adopts the following technical solutions: An automobile frame welding strength detection device includes a base. On one side of the base, two fixed frames are fixedly connected. At the upper ends of the two fixed frames, two first slide rails are fixedly connected. In the middle of one of the first slide rails, a fixed slide rod is arranged, and the middle part of the fixed slide rod is arranged inside the first slide rail. On the surface of the middle part of the fixed slide rod, a first sliding block is slidably connected. In the middle of the other first slide rail, a first threaded rod is rotatably connected, and the middle part of the first threaded rod is arranged inside the first slide rail. On the surface of the middle part of the first threaded rod, a thread is arranged. A first sliding block is threadedly connected to the surface of the first threaded rod, and both of the two first sliding blocks are slidably connected inside the first slide rail. At the lower ends of the two first sliding blocks, a second slide rail is fixedly connected. In the middle of the second slide rail, a second threaded rod is rotatably connected. The middle part of the second threaded rod is located inside the second slide rail. On the surface of the middle part of the second threaded rod, a thread is arranged. A sliding seat is threadedly connected to the surface of the middle part of the second threaded rod, and the sliding seat is slidably connected inside the second slide rail. At one end of the sliding seat away from the second slide rail, a first cylinder is fixedly connected. The output end of the first cylinder is fixedly connected with a third mounting seat. At the lower end of the third mounting seat, a fixed seat is fixedly connected. In the middle of the lower end of the fixed seat, a fixed cylinder is fixedly connected. At the lower end of the fixed cylinder, a limit disc is fixedly connected. In the middle of the fixed cylinder, an impact slide rod is slidably connected, and the impact slide rod passes through the middle of the fixed cylinder. At the upper end of the impact slide rod, a limit disc is fixedly connected, and the limit disc is slidably connected in the middle of the fixed cylinder. A spring is sleeved on the surface of the impact slide rod, and the spring is located between the two limit discs. At the upper end of the fixed cylinder, a protective shell is fixedly connected. In the middle of the protective shell, a third servo motor is fixedly connected to the middle of the third mounting seat. The output end of the third servo motor is fixedly connected with a cam, and the cam is rotatably connected in the middle of the protective shell.

[0006] As a further description of the above technical solution:

[0007] Two sliding grooves are arranged inside the base, and the openings of the sliding grooves are located at the upper end of the base. Two third threaded rods are rotatably connected inside the base, and the middle parts of the third threaded rods are arranged inside the sliding grooves. On the surface of the middle parts of the third threaded rods, threads are arranged.

[0008] As a further description of the above technical solution:

[0009] Third synchronous wheels are fixedly connected to the middle parts of the third threaded rods respectively. A fourth servo motor is fixedly connected to the middle of the base. The output end of the fourth servo motor is fixedly connected with two third synchronous wheels, and the third synchronous wheels in the middle of the third threaded rods are respectively connected to the third synchronous wheels at the output end of the fourth servo motor through synchronous belts. The fourth servo motor drives the third threaded rods to rotate through the third synchronous wheels and synchronous belts.

[0010] As a further description of the above technical solution:

[0011] On both sides of the base, four groups of second cylinders are fixedly connected inside. The output ends of the second cylinders are all threadedly connected with connecting cylinders. The upper ends of the connecting cylinders are all fixedly connected with fixed bottom plates. One side of the fixed bottom plate is hinged with a fixed cover plate, and the other side of the fixed cover plate is connected to the fixed bottom plate through a buckle. By pushing the connecting cylinder upward with the second cylinder, the connecting cylinder pushes the fixed bottom plate upward, and the vehicle frame is fixed between the fixed bottom plate and the fixed cover plate. The fixed cover plate rotates around the fixed bottom plate through a hinge, and then through the buckle, the other ends of the fixed cover plate and the fixed bottom plate are fixed together.

[0012] As a further description of the above technical solution:

[0013] On one side of the four groups of second cylinders at both ends of the base, second sliding blocks are fixedly connected. The second sliding blocks are all threadedly connected to the surface of the third threaded rod. The fourth servo motor drives the two groups of third threaded rods to rotate through two groups of third synchronous wheels and two groups of synchronous belts. The second sliding block is driven to move in the sliding groove by the third threaded rod, and the second sliding block drives the four groups of second cylinders at both ends of the base to move, so that the four groups of fixed cover plates at both ends of the base can fix the four corners of the vehicle frame. After fixing the four corners of the vehicle frame, the fourth servo motor is started again to make the second cylinder pull the vehicle frame to detect the tensile performance of the welding position.

[0014] As a further description of the above technical solution:

[0015] On the upper surface of one group of the fixed frames, a first mounting seat is fixedly connected. In the middle of the first mounting seat, a first servo motor is fixedly connected. The output end of the first servo motor is fixedly connected with a first synchronous wheel. One end of the first threaded rod passing through the first slide rail is fixedly connected with a first synchronous wheel. The two groups of first synchronous wheels are connected by a synchronous belt. The first servo motor is fixed to the upper end of the fixed frame through the first mounting seat, and the first servo motor drives the first threaded rod to rotate through the first synchronous wheel and the synchronous belt.

[0016] As a further description of the above technical solution:

[0017] One end of the second threaded rod passing through the second slide rail is fixedly connected with a second synchronous wheel. On one side of the second slide rail, a second mounting seat is fixedly connected. In the middle of the second mounting seat, a second servo motor is fixedly connected. The output end of the second servo motor is fixedly connected with a second synchronous wheel. The two groups of second synchronous wheels are connected by a synchronous belt. The second servo motor is fixed to one end of the second slide rail through the second mounting seat, and the second servo motor drives the second threaded rod to rotate through the synchronous belt and the synchronous wheel.

[0018] The utility model has the following beneficial effects:

[0019] In the present utility model, first, the third servo motor drives the cam to rotate. The rotation of the cam drives the protective shell to move up and down. When the protruding end of the cam rotates to the uppermost position, the protective shell drives the impact slide rod to move upward. When the protective shell moves downward, it pushes the impact slide rod to move downward along the fixed cylinder. During the downward sliding of the impact slide rod, the spring is pressed by the limit disc, causing the spring to undergo elastic deformation. When the protruding end of the cam leaves the lowermost end of the protective shell, under the push of the spring, the impact slide rod will move upward with the protective shell. Thus, during the circular motion of the cam, the impact slide rod is continuously pushed to move downward and then upward. When the impact slide rod moves downward, it impacts the welding position of the vehicle frame, thereby performing multiple consecutive and uninterrupted impact detections on the vehicle frame with the same force, and thus completing the detection of the welding strength of the vehicle frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional view of the present utility model;

[0021] Figure 2 is a three-dimensional structural diagram of the first slide rail of the present utility model;

[0022] Figure 3 is a three-dimensional structural diagram of the cross-section of the fixed cylinder of the present utility model;

[0023] Figure 4 is a three-dimensional structural diagram of the cross-section of the base of the present utility model.

[0024] LEGEND DESCRIPTION:

[0025] 1. Base; 2. Fixed frame; 3. First slide rail; 4. First threaded rod; 5. First synchronous pulley; 6. First mounting seat; 7. First servo motor; 8. Fixed slide rod; 9. First sliding block; 10. Second slide rail; 11. Second threaded rod; 12. Second synchronous pulley; 13. Second mounting seat; 14. Second servo motor; 15. Sliding seat; 16. First cylinder; 17. Third mounting seat; 18. Fixed seat; 19. Third servo motor; 20. Cam; 21. Protective shell; 22. Fixed cylinder; 23. Spring; 24. Impact slide rod; 25. Limit disc; 26. Fourth servo motor; 27. Third synchronous pulley; 28. Third threaded rod; 29. Second cylinder; 30. Second sliding block; 31. Connecting cylinder; 32. Fixed bottom plate; 33. Fixed cover plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Refer to Figures 1-4, an embodiment provided by the present utility model: an automobile frame welding strength detection device, including a base 1, two fixing frames 2 are fixedly connected to one side of the base 1, two first sliding rails 3 are fixedly connected to the upper ends of the two fixing frames 2, a fixed sliding rod 8 is arranged in the middle of one first sliding rail 3, and the middle of the fixed sliding rod 8 is arranged inside the first sliding rail 3, and a first sliding block 9 is slidably connected to the surface of the middle of the fixed sliding rod 8. A first threaded rod 4 is rotatably connected to the middle of the other first sliding rail 3, and the middle of the first threaded rod 4 is arranged inside the first sliding rail 3, and threads are arranged on the surface of the middle of the first threaded rod 4. A first sliding block 9 is threadedly connected to the surface of the first threaded rod 4, and both first sliding blocks 9 are slidably connected inside the first sliding rail 3. The lower ends of the two first sliding blocks 9 are fixedly connected to a second sliding rail 10. A second threaded rod 11 is rotatably connected to the middle of the second sliding rail 10. The middle of the second threaded rod 11 is located inside the second sliding rail 10, and threads are arranged on the surface of the middle of the second threaded rod 11. A sliding seat 15 is threadedly connected to the surface of the middle of the second threaded rod 11, and the sliding seat 15 is slidably connected inside the second sliding rail 10. One end of the sliding seat 15 away from the second sliding rail 10 is fixedly connected to a first cylinder 16. The output end of the first cylinder 16 is fixedly connected to a third mounting seat 17. A fixing seat 18 is fixedly connected to the lower end of the third mounting seat 17. A fixing cylinder 22 is fixedly connected to the middle of the lower end of the fixing seat 18. A limiting disk 25 is fixedly connected to the lower end of the fixing cylinder 22. An impact sliding rod 24 is slidably connected to the middle of the fixing cylinder 22, and the impact sliding rod 24 passes through the middle of the fixing cylinder 22. A limiting disk 25 is fixedly connected to the upper end of the impact sliding rod 24, and the limiting disk 25 is slidably connected to the middle of the fixing cylinder 22. A spring 23 is sleeved on the surface of the impact sliding rod 24, and the spring 23 is located between the two limiting disks 25. A protective shell 21 is fixedly connected to the upper end of the fixing cylinder 22. In the middle of the protective shell 21, a third servo motor 19 is fixedly connected to the middle of the third mounting seat 17. The output end of the third servo motor 19 is fixedly connected to a cam 20, and the cam 20 is rotatably connected to the middle of the protective shell 21.

[0029] The second threaded rod 11 passes through one end of the second slide rail 10 and is fixedly connected to a second synchronous pulley 12. One side of the second slide rail 10 is fixedly connected to a second mounting seat 13. The middle of the second mounting seat 13 is fixedly connected to a second servo motor 14. The output end of the second servo motor 14 is fixedly connected to the second synchronous pulley 12. The two second synchronous pulleys 12 are connected by a synchronous belt. The second servo motor 14 is fixed to one end of the second slide rail 10 through the second mounting seat 13. The second servo motor 14 drives the second threaded rod 11 to rotate through the synchronous belt and the synchronous pulley. The upper surface of a set of fixing frames 2 is fixedly connected to a first mounting seat 6. The middle of the first mounting seat 6 is fixedly connected to a first servo motor 7. The output end of the first servo motor 7 is fixedly connected to a first synchronous pulley 5. The first threaded rod 4 passes through one end of the first slide rail 3 and is fixedly connected to the first synchronous pulley 5. The two first synchronous pulleys 5 are connected by a synchronous belt. The first servo motor 7 is fixed to the upper end of the fixing frame 2 through the first mounting seat 6. The first servo motor 7 drives the first threaded rod 4 to rotate through the first synchronous pulley 5 and the synchronous belt. On one side of each of the four second cylinders 29 located at both ends of the base 1, a second sliding block 30 is fixedly connected, and the second sliding blocks 30 are all threadedly connected to the surface of the third threaded rod 28. The fourth servo motor 26 drives the two third threaded rods 28 to rotate through two third synchronous pulleys 27 and two synchronous belts. The third threaded rod 28 drives the second sliding block 30 to move in the sliding groove. The second sliding block 30 drives the four second cylinders 29 at both ends of the base 1 to move, so that the four fixed cover plates 33 at both ends of the base 1 can fix the four corners of the vehicle frame. After fixing the four corners of the vehicle frame, the fourth servo motor 26 is started again to make the second cylinders 29 pull the vehicle frame to detect the tensile performance of the welding position. Four second cylinders 29 are fixedly connected to the inside of both sides of the base 1. The output ends of the second cylinders 29 are all threadedly connected to connecting cylinders 31. The upper ends of the connecting cylinders 31 are fixedly connected to fixed bottom plates 32. One side of the fixed bottom plate 32 is hinged to a fixed cover plate 33, and the other side of the fixed cover plate 33 is connected to the fixed bottom plate 32 through a buckle. The second cylinder 29 pushes the connecting cylinder 31 upward, so that the connecting cylinder 31 pushes the fixed bottom plate 32 to move upward. The vehicle frame is fixed between the fixed bottom plate 32 and the fixed cover plate 33. The fixed cover plate 33 rotates around the fixed bottom plate 32 through a hinge, and then the other ends of the fixed cover plate 33 and the fixed bottom plate 32 are fixed together through a buckle. Third synchronous pulleys 27 are fixedly connected to the middle of the third threaded rods 28. A fourth servo motor 26 is fixedly connected to the middle of the base 1. The output end of the fourth servo motor 26 is fixedly connected to two third synchronous pulleys 27, and the third synchronous pulleys 27 in the middle of the third threaded rods 28 are all connected to the third synchronous pulleys 27 at the output end of the fourth servo motor 26 through synchronous belts. The fourth servo motor 26 drives the third threaded rods 28 to rotate through the third synchronous pulleys 27 and the synchronous belts. Two sliding grooves are provided inside the base 1, and the openings of the sliding grooves are located at the upper end of the base 1. Two third threaded rods 28 are rotatably connected inside the base 1, and the middle parts of the third threaded rods 28 are all arranged inside the sliding grooves.Moreover, the middle surface of the third threaded rod 28 is provided with threads.

[0030] Working principle: During use, the fourth servo motor 26 drives the third threaded rod 28 to rotate through the synchronous belt and the third synchronous pulley 27, thereby driving the second sliding block 30 to move. The second sliding block 30 drives the second cylinders 29 at both ends of the base 1 to move, so that the four groups of fixed bottom plates 32 at both ends of the base 1 correspond to the four corners of the vehicle frame. Then, the fourth servo motor 26 stops rotating, and the fixed cover plate 33 rotates around the fixed bottom plate 32. The four corners of the vehicle frame are placed in the middle of the fixed bottom plate 32, and the fixed cover plate 33 is fixed to the fixed bottom plate 32 through the buckle. Then, the fourth servo motor 26 is started again, and the four groups of second sliding blocks 30 drive the second cylinders 29 to move towards both ends of the base 1, thereby pulling the four corners of the vehicle frame, so as to detect the tensile property of the welding. The first servo motor 7 drives the first threaded rod 4 to rotate through the synchronous belt and the first synchronous pulley 5, so that the first sliding block 9 drives the second slide rail 10 to move back and forth along the first threaded rod 4 and the fixed slide rod 8. The second servo motor 14 drives the second threaded rod 11 to rotate through the synchronous belt and the second synchronous pulley 12, so that the sliding seat 15 drives the first cylinder 16 to move back and forth along the second threaded rod 11. When the first cylinder 16 drives the impact slide rod 24 to move above the welding position, the first servo motor 7 and the second servo motor 14 stop rotating. The first cylinder 16 pushes the third mounting seat 17 downward, so that the impact slide rod 24 is closer to the welding position. The third servo motor 19 drives the cam 20 to rotate, and the rotation of the cam 20 drives the protective shell 21 to move up and down. When the protruding end of the cam 20 rotates to the uppermost end, the protective shell 21 drives the impact slide rod 24 to move upward. When the protective shell 21 moves downward, it will push the impact slide rod 24 to move downward along the fixed cylinder 22. During the downward sliding process of the impact slide rod 24, the spring 23 is pressed by the limiting disc 25, so that the spring 23 undergoes elastic deformation. When the protruding end of the cam 20 leaves the lowermost end of the protective shell 21, under the push of the spring 23, the impact slide rod 24 will move upward following the protective shell 21. During the circular motion of the cam 20, the impact slide rod 24 is continuously pushed to move downward and then upward. When the impact slide rod 24 moves downward, it will impact the welding position of the vehicle frame, thereby continuously impacting the vehicle frame multiple times with the same force for detection. The first servo motor 7 and the second servo motor 14 are started, and the first cylinder 16 drives the impact slide rod 24 to move to both sides of the welding position, and the two sides of the welding position are also impacted to realize the detection of the welding strength of the vehicle frame.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automobile frame welding strength detection device, comprising a base (1), characterized in that: On one side of the base (1), two sets of fixing brackets (2) are fixedly connected. At the upper ends of the two sets of fixing brackets (2), two sets of first sliding rails (3) are fixedly connected. In the middle of one set of the first sliding rails (3), a fixed sliding rod (8) is arranged, and the middle part of the fixed sliding rod (8) is arranged inside the first sliding rail (3). On the surface of the middle part of the fixed sliding rod (8), a first sliding block (9) is slidably connected. In the middle of the other set of the first sliding rails (3), a first threaded rod (4) is rotatably connected, and the middle part of the first threaded rod (4) is arranged inside the first sliding rail (3). On the surface of the middle part of the first threaded rod (4), threads are provided. A first sliding block (9) is threadedly connected to the surface of the first threaded rod (4), and both of the two first sliding blocks (9) are slidably connected inside the first sliding rail (3). At the lower ends of the two first sliding blocks (9), a second sliding rail (10) is fixedly connected. In the middle of the second sliding rail (10), a second threaded rod (11) is rotatably connected. The middle part of the second threaded rod (11) is located inside the second sliding rail (10). On the surface of the middle part of the second threaded rod (11), threads are provided. A sliding seat (15) is threadedly connected to the surface of the middle part of the second threaded rod (11), and the sliding seat (15) is slidably connected inside the second sliding rail (10). One end of the sliding seat (15) away from the second sliding rail (10) is fixedly connected to a first air cylinder (16). The output end of the first air cylinder (16) is fixedly connected to a third mounting seat (17). At the lower end of the third mounting seat (17), a fixing seat (18) is fixedly connected. In the middle of the lower end of the fixing seat (18), a fixing cylinder (22) is fixedly connected. At the lower end of the fixing cylinder (22), a limiting disc (25) is fixedly connected. A striking sliding rod (24) is slidably connected to the middle part of the fixing cylinder (22), and the striking sliding rod (24) passes through the middle part of the fixing cylinder (22). At the upper end of the striking sliding rod (24), a limiting disc (25) is fixedly connected, and the limiting disc (25) is slidably connected to the middle part of the fixing cylinder (22). A spring (23) is sleeved on the surface of the striking sliding rod (24), and the spring (23) is located between the two limiting discs (25). At the upper end of the fixing cylinder (22), a protective shell (21) is fixedly connected. In the middle of the protective shell (21), a third servo motor (19) is fixedly connected to the middle part of the third mounting seat (17). The output end of the third servo motor (19) is fixedly connected to a cam (20), and the cam (20) is rotatably connected to the middle part of the protective shell (21).

2. The welding strength detection device for an automobile frame according to claim 1, wherein: Two sets of sliding grooves are arranged inside the base (1), and the openings of the sliding grooves are located at the upper end of the base (1). Two sets of third threaded rods (28) are rotatably connected inside the base (1), and the middle parts of the third threaded rods (28) are all arranged inside the sliding grooves. On the surface of the middle parts of the third threaded rods (28), threads are provided.

3. The welding strength detection device for an automobile frame according to claim 2, characterized in that: A third synchronous pulley (27) is fixedly connected to the middle of each of the third threaded rods (28). A fourth servo motor (26) is fixedly connected to the middle of the base (1). A third synchronous pulley (27) is fixedly connected to the output end of the fourth servo motor (26). The third synchronous pulleys (27) in the middle of the third threaded rods (28) are connected to the third synchronous pulley (27) at the output end of the fourth servo motor (26) through synchronous belts.

4. The welding strength detection device for an automobile frame according to claim 3, wherein: Four groups of second cylinders (29) are fixedly connected to the inner sides of both sides of the base (1). The output ends of the second cylinders (29) are all threadedly connected with connecting cylinders (31). A fixed bottom plate (32) is fixedly connected to the upper end of each of the connecting cylinders (31). A fixed cover plate (33) is hinged to one side of the fixed bottom plate (32), and the other side of the fixed cover plate (33) is connected to the fixed bottom plate (32) through a buckle.

5. An automobile frame welding strength detection device according to claim 4, characterized in that: A second sliding block (30) is fixedly connected to one side of each of the four groups of second cylinders (29) at both ends of the base (1), and the second sliding blocks (30) are all threadedly connected to the surface of the third threaded rod (28).

6. The welding strength detection device for an automobile frame according to claim 1, characterized in that: A first mounting seat (6) is fixedly connected to the upper surface of a group of fixed frames (2). A first servo motor (7) is fixedly connected to the middle of the first mounting seat (6). A first synchronous pulley (5) is fixedly connected to the output end of the first servo motor (7). A first synchronous pulley (5) is fixedly connected to one end of the first threaded rod (4) passing through the first slide rail (3). The two first synchronous pulleys (5) are connected through a synchronous belt.

7. An automobile frame welding strength detection device according to claim 1, characterized in that: A second synchronous pulley (12) is fixedly connected to one end of the second threaded rod (11) passing through the second slide rail (10). A second mounting seat (13) is fixedly connected to one side of the second slide rail (10). A second servo motor (14) is fixedly connected to the middle of the second mounting seat (13). A second synchronous pulley (12) is fixedly connected to the output end of the second servo motor (14). The two second synchronous pulleys (12) are connected through a synchronous belt.

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