A crash testing device for automobile bumper production

Abstract

This utility model relates to the field of automotive bumper impact testing technology, and more particularly to an impact testing device for automotive bumper production. It includes a worktable and an impact head. The worktable contains a rotatable polygonal impact testing platform, a protective cover, and a lifting control mechanism. The protective cover is fixedly connected to the upper end of the worktable. Vertical guide rails are symmetrically arranged on the inner walls of both sides of the protective cover. Guide sliders are slidably connected within the guide rails, and a top plate is fixedly connected between the two guide sliders. A U-shaped frame is fixedly connected to the lifting control mechanism's front lifting section, and a support plate is rotatably connected within the U-shaped frame. An electromagnet is fixedly connected to the inner wall of the rear side of the protective cover, and a magnetic block magnetically connected to the electromagnet is installed at the rear end of the top plate. This utility model achieves a "multi-purpose" function by using different sized fixtures installed on each side, while effectively suppressing the rebound of the impact head. The combined use of the electromagnet and the magnetic block makes the fixation of the impact head more reliable.

Description

Technical Field

[0001] This utility model relates to the field of automotive bumper impact testing technology, and in particular to an impact testing device for automotive bumper production. Background Technology

[0002] In the manufacturing process of automobile bumpers, impact testing is an important step in evaluating the bumper's impact resistance and quality safety.

[0003] In actual production, automakers need to develop bumpers of various specifications for different car models. However, most existing testing equipment uses fixed testing platforms with single-specification testing fixtures that cannot be adapted to different models and sizes of bumper products. This requires frequent fixture changes or platform adjustments, which is not only cumbersome but also seriously affects testing efficiency. In addition, when the impact head impacts the sample, due to the lack of effective buffering and limiting mechanisms, the impact head is prone to rebound under the reaction force, causing a secondary impact on the sample. This uncontrolled secondary impact will seriously affect the accuracy of the test data, leading to distorted test results. More seriously, repeated impacts may cause additional damage to the sample, making it impossible to truly reflect the bumper's single impact resistance performance.

[0004] Therefore, given that the existing testing fixtures are of limited specifications, require frequent fixture changes or testing platform adjustments, and lack effective buffering and limiting mechanisms, which can easily cause secondary impacts on the samples, a collision testing device for automobile bumper production can be designed. This device adopts a polygonal design and uses fixtures of different specifications installed on each side, allowing for rapid switching of testing stations. Furthermore, the anti-secondary impact mechanism effectively suppresses the rebound of the impact head. Utility Model Content

[0005] To overcome the problems of existing testing fixtures having limited specifications, requiring frequent fixture replacements or testing platform adjustments, and lacking effective buffering and limiting mechanisms, which easily cause secondary impacts on the samples.

[0006] The technical solution of this utility model is as follows: a collision testing device for automobile bumper production, including a workbench and a collision head. The upper part of the workbench has an opening, and a rotatable polygonal collision testing platform is set inside the workbench. It also includes a protective cover and a lifting control mechanism. The protective cover is fixedly connected to the upper part of the workbench. The front end of the protective cover has an opening. Vertical guide rails are symmetrically arranged on both inner walls of the protective cover. Guide sliders are slidably connected in the guide rails. A top plate is fixedly connected between the two guide sliders. The collision head is detachably installed at the lower end of the top plate. A lifting control mechanism is installed on the rear inner wall of the protective cover. A U-shaped frame is fixedly connected to the lifting part of the lifting control mechanism. A support plate is rotatably connected in the U-shaped frame. The upper end of the support plate is attached to the lower end of the top plate. An electromagnet is fixedly connected to the rear inner wall of the protective cover. A magnetic block connected to the electromagnet is installed at the rear end of the top plate. Fixtures of different specifications are installed on each side of the collision testing platform. Cylinders are fixedly connected to both inner walls of the protective cover. The telescopic end of the upper side of the cylinder passes through the bottom plate of the guide rail. A contact switch is installed on the inner wall of the guide rail.

[0007] Preferably, the bumper to be tested is mounted on the corresponding fixture of the impact test bench. The impact test bench is rotated so that the target test surface faces the impact head. The electromagnet is energized to attract the magnetic block, keeping the top plate stable. During the test, the support plate inside the U-shaped frame is rotated to offset the support plate from the top plate. The electromagnet is de-energized, allowing the impact head to fall freely, simulating an impact condition. The bumper to be tested on the fixture is impacted. When the impact head and the top plate descend, the guide slider slides downward synchronously in the guide rail. When the impact head collides with the bumper to be tested, the guide slider contacts the contact switch, triggering the extension end of the cylinder to rise upward, pushing the guide slider to slide along the guide rail. This causes the impact head to rebound and impact the bumper to be tested a second time. Then, the tested bumper can be removed.

[0008] Preferably, the lifting control mechanism includes a fixed seat vertically installed on the inner wall of the rear side of the protective cover, a ball nut movably connected inside the fixed seat, a ball screw passing through the ball nut, the two ends of the ball screw being rotatably connected to the fixed seat, a first motor installed inside the fixed seat, a drive gear installed on the outer circumference of the output shaft of the first motor, and a driven gear meshing with the drive gear installed on the outer circumference of the ball screw.

[0009] Preferably, a rotating shaft is installed through the impact test stand, and the impact test stand and the rotating shaft are fixedly connected. One end of the rotating shaft is rotatably connected to the worktable, and the other end of the rotating shaft passes through the worktable and is connected to the output shaft of the second motor. A mounting plate for supporting the second motor is fixedly connected to the outer surface of the worktable.

[0010] Preferably, a waste collection port is provided on the front side of the workbench, and a waste bin is detachably installed inside the waste collection port.

[0011] Preferably, the front end of the protective cover is connected to a cover plate via a hinge, and the cover plate is made of a transparent material.

[0012] Preferably, a threaded post is fixedly connected to the upper end of the impact head, and the threaded post passes through the top plate and is threadedly connected to the locking nut.

[0013] The beneficial effects of this utility model are:

[0014] Outstanding multi-specification adaptability: Through the innovative polygonal impact test stand design, combined with different sized fixtures installed on each side, it achieves the function of "one machine for multiple uses". By rotating the impact test stand, the test station can be quickly switched, which greatly improves the testing efficiency. After the impact head completes the first impact, the guide slider slides down the guide rail to trigger the contact switch, which immediately starts the cylinder to lift, effectively suppressing the rebound of the impact head and ensuring the accuracy and reliability of the test data. Compared with the traditional design that relies on springs or rubber pads for buffering, this solution has a faster response speed and more precise control. The use of electromagnets and magnetic blocks makes the fixation of the impact head more reliable and avoids the loosening problems that may occur with traditional mechanical locking. The detachable design of the waste bin makes it easy to clean up the debris generated during the test and keep the working environment clean. Attached Figure Description

[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of the impact testing device for automobile bumper production according to this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional cross-sectional view of the impact testing device for automobile bumper production according to this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the top plate and guide rail in the impact testing device for automobile bumper production according to this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the lifting control mechanism and the support plate in the impact testing device for automobile bumper production according to this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Workbench; 2. Impact test bench; 3. Impact head; 4. Protective cover; 5. Guide rail; 6. Guide slider; 7. Top plate; 81. Fixed seat; 82. Ball nut; 83. Ball screw; 84. First motor; 85. Driving gear; 86. Driven gear; 9. U-shaped frame; 10. Support plate; 11. Electromagnet; 12. Magnetic block; 13. Fixture; 14. Cylinder; 15. Contact switch; 16. Rotating shaft; 17. Mounting plate; 18. Second motor; 19. Scrap bin; 20. Cover plate; 21. Threaded post; 22. Locking nut. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment: an impact testing device for automobile bumper production, including a workbench 1 and an impact head 3. The workbench 1 has an opening at its upper part, and a rotatable polygonal impact testing platform 2 is arranged inside the workbench 1. It also includes a protective cover 4 and a lifting control mechanism. The protective cover 4 is fixedly connected to the upper end of the workbench 1, and the front end of the protective cover 4 has an opening. Vertical guide rails 5 are symmetrically arranged on the inner walls of both sides of the protective cover 4. Guide sliders 6 are slidably connected within the guide rails 5. A top plate 7 is fixedly connected between the two guide sliders 6. The impact head 3 is detachably installed at the lower end of the top plate 7. A lifting control mechanism is installed on the inner wall of the rear side of the cover 4. A U-shaped frame 9 is fixedly connected to the lifting part of the front side of the lifting control mechanism. A support plate 10 is rotatably connected inside the U-shaped frame 9. The upper end of the support plate 10 is attached to the lower end of the top plate 7. An electromagnet 11 is fixedly connected to the inner wall of the rear side of the protective cover 4. A magnetic block 12 that is magnetically connected to the electromagnet 11 is installed at the rear end of the top plate 7. A fixture 13 of different specifications is installed on each side of the impact test bench 2. Cylinders 14 are fixedly connected to the inner walls of both sides of the protective cover 4. The telescopic end of the upper side of the cylinder 14 passes through the bottom plate of the guide rail 5. A contact switch 15 is installed on the inner wall of the guide rail 5.

[0022] Please see Figure 4 In this embodiment, the lifting control mechanism includes a fixed base 81 vertically installed on the inner rear wall of the protective cover 4. A ball nut 82 is movably connected inside the fixed base 81, and a ball screw 83 is installed through the ball nut 82. The two ends of the ball screw 83 are rotatably connected to the fixed base 81. A first motor 84 is installed inside the fixed base 81. A drive gear 85 is installed on the outer circumference of the output shaft of the first motor 84, and a driven gear 86 that meshes with the drive gear 85 is installed on the outer circumference of the ball screw 83. Power transmission is achieved through gear meshing, which has the characteristics of high positioning accuracy and smooth operation. The first motor 84 drives the drive gear 85 to rotate, thereby causing the ball screw 83 to rotate precisely, driving the ball nut 82 and the U-shaped frame 9 to achieve millimeter-level precision lifting control.

[0023] Please see Figures 1-2In this embodiment, a rotating shaft 16 is installed through the impact test bench 2, and the impact test bench 2 and the rotating shaft 16 are fixedly connected. One end of the rotating shaft 16 is rotatably connected to the workbench 1, and the other end of the rotating shaft 16 passes through the workbench 1 and is connected to the output shaft of the second motor 18. A mounting plate 17 for supporting the second motor 18 is fixedly connected to the outer surface of the workbench 1. The rotary drive mechanism adopts a direct connection method. The second motor 18 directly drives the polygonal impact test bench 2 to rotate through the rotating shaft 16, avoiding the slippage problem that may exist in traditional belt drives. The mounting plate 17 provides stable support for the motor and ensures the rigidity of the transmission system. This design can realize the rapid and accurate switching of the test bench. With the use of different specifications of fixtures 13, the testing efficiency is greatly improved, meeting the continuous testing needs of multiple types of bumpers. A waste collection port is provided on the front side of the workbench 1, and a waste box 19 is detachably installed in the waste collection port. The waste bin 19 is designed to automatically collect and centrally process test waste. The bin adopts a pull-out structure, which is convenient for quick emptying and maintenance. This design effectively solves the problem of waste scattering in traditional testing devices, keeps the working environment clean, and avoids the interference that waste accumulation may cause to the testing process. The front end of the protective cover 4 is connected to the cover plate 20 by a hinge. The cover plate 20 is made of transparent material, which not only ensures the operator's real-time observation of the testing process, but also provides reliable safety protection. The hinge connection makes the cover plate 20 easy to open and close, which is convenient for sample clamping and equipment maintenance, while ensuring the airtightness during the testing process and preventing fragments from splashing and causing safety hazards. The upper end of the impact head 3 is fixedly connected to a threaded post 21. The threaded post 21 passes through the top plate 7 and is threadedly connected to the locking nut 22, which realizes the quick replacement and firm fixation of the impact head 3. The locking nut 22 can effectively prevent loosening during the testing process.

[0024] During operation, first open the transparent cover 20 at the front of the protective cover 4. As needed for the test, install the required impact head 3 on the lower end of the top plate 7 using threaded posts 21 and locking nuts 22. Install the bumper to be tested on the corresponding fixture 13 of the impact test bench 2. Drive the rotating shaft 16 to rotate via the second motor 18 at the upper end of the mounting plate 17, causing the impact test bench 2 to rotate so that the bumper to be tested faces directly below the impact head 3. The electromagnet 11 is energized to attract the magnetic block 12, stabilizing the top plate 7. During testing, rotate the support plate 10 inside the U-shaped frame 9 to displace the support plate 10 from the top plate 7. De-energize the electromagnet 11, allowing the impact head 3 to fall freely, simulating an impact condition. Perform an impact test on the bumper to be tested on the fixture 13. As the impact head 3 and the top plate 7 descend, the guide slider 6 slides downwards synchronously within the guide rail 5. When the impact head 3 collides with the bumper to be tested, the guide slider 6 contacts the contact opening... When the contact is closed (15), the telescopic end of the trigger cylinder 14 is lifted upward, pushing the guide slider 6 to slide along the guide rail 5. This causes the impact head 3 to bounce back and strike the bumper under test a second time. During the test, the unqualified bumper may break, and the broken parts fall into the waste bin 19. After a single test is completed, the first motor 84 in the fixed seat 81 drives the active gear 85 to rotate, which drives the driven gear 86 and the ball screw 83 to rotate, causing the ball nut 82 to descend in the fixed seat 81, thereby adjusting the height of the U-shaped frame 9. The support plate 10 in the U-shaped frame 9 is rotated so that the support plate 10 is in contact with the lower end of the top plate 7. Then, the first motor 84 is rotated in the opposite direction to raise the support plate 10. At this time, the electromagnet 11 is energized until the magnetic block 12 at the rear end of the top plate 7 is aligned with the electromagnet 11. The electromagnet 11 attracts the magnetic block 12, thereby firmly fixing the top plate 7 and raising the impact head 3 to the initial position. The product can then be removed.

[0025] Through the above steps, the innovative polygonal impact test platform 2 design, combined with different sized fixtures 13 installed on each side, achieves the function of "one machine for multiple uses". By rotating the impact test platform 2, the test station can be quickly switched, greatly improving the test efficiency. After the impact head 3 completes the first impact, the guide slider 6 slides down along the guide rail 5 to trigger the contact switch 15, which immediately starts the cylinder 14 to push up, effectively suppressing the rebound of the impact head 3 and ensuring the accuracy and reliability of the test data. Compared with the traditional design that relies on springs or rubber pads for buffering, this solution has a faster response speed and more precise control. The combined use of the electromagnet 11 and the magnetic block 12 makes the fixation of the impact head 3 more reliable, avoiding the loosening problem that may occur with traditional mechanical locking. The detachable design of the waste box 19 makes it easy to clean up the debris generated during the test and keep the working environment clean. This solves the problem that the existing device has a single specification of test fixture 13, which requires frequent replacement of fixture 13 or adjustment of the test platform, and lacks an effective buffer and limiting mechanism, which is prone to secondary impact on the sample.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A collision testing device for automobile bumper production, comprising a worktable (1) and a collision head (3), wherein the upper part of the worktable (1) is provided with an opening, and a rotatable polygonal collision testing platform (2) is provided inside the worktable (1), characterized in that: It also includes a protective cover (4) and a lifting control mechanism. The upper end of the workbench (1) is fixedly connected to the protective cover (4). The front end of the protective cover (4) is provided with an opening. Vertical guide rails (5) are symmetrically arranged on both sides of the inner wall of the protective cover (4). Guide sliders (6) are slidably connected in the guide rails (5). A top plate (7) is fixedly connected between the two guide sliders (6). The impact head (3) is detachably installed at the lower end of the top plate (7). A lifting control mechanism is installed on the rear inner wall of the protective cover (4). A U-shaped frame (9) is fixedly connected to the lifting part on the front side of the lifting control mechanism. 9) An inner rotating connection is provided with a support plate (10). The upper end of the support plate (10) is attached to the lower end of the top plate (7). An electromagnet (11) is fixedly connected to the inner wall of the rear side of the protective cover (4). A magnetic block (12) is installed at the rear end of the top plate (7) and is magnetically connected to the electromagnet (11). A fixture (13) of different specifications is installed on each side of the impact test bench (2). A cylinder (14) is fixedly connected to the inner walls of both sides of the protective cover (4). The telescopic end of the cylinder (14) passes through the bottom plate of the guide rail (5). A contact switch (15) is installed on the inner wall of the guide rail (5).

2. The impact testing device for automobile bumper production according to claim 1, characterized in that: The lifting control mechanism includes a fixed seat (81) vertically installed on the inner wall of the rear side of the protective cover (4). A ball nut (82) is movably connected inside the fixed seat (81). A ball screw (83) is installed through the ball nut (82). Both ends of the ball screw (83) are rotatably connected to the fixed seat (81). A first motor (84) is installed inside the fixed seat (81). A drive gear (85) is installed on the outer circumference of the output shaft of the first motor (84). A driven gear (86) that meshes with the drive gear (85) is installed on the outer circumference of the ball screw (83).

3. The impact testing device for automobile bumper production according to claim 1, characterized in that: A rotating shaft (16) is installed inside the impact test bench (2). The impact test bench (2) and the rotating shaft (16) are fixedly connected. One end of the rotating shaft (16) is rotatably connected to the workbench (1). The other end of the rotating shaft (16) passes through the workbench (1) and is connected to the output shaft of the second motor (18). A mounting plate (17) for supporting the second motor (18) is fixedly connected to the outer surface of the workbench (1).

4. The impact testing device for automobile bumper production according to claim 1, characterized in that: The front side of the workbench (1) is provided with a waste collection port, and a waste box (19) is detachably installed inside the waste collection port.

5. The impact testing device for automobile bumper production according to claim 1, characterized in that: The front end of the protective cover (4) is connected to a cover plate (20) by a hinge, and the cover plate (20) is made of transparent material.

6. The impact testing device for automobile bumper production according to claim 1, characterized in that: The upper end of the impact head (3) is fixedly connected to a threaded column (21), which passes through the top plate (7) and is threadedly connected to the locking nut (22).

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