Strength detection platform for protective device at rear lower part of automobile

Abstract

The invention relates to the technical field of vehicle detection, and discloses an automobile rear lower portion protection device strength detection platform which comprises a supporting frame, a control table arranged on one side of the supporting frame, a clamping pressure-bearing mechanism and a pressure applying impact mechanism, and the clamping pressure-bearing mechanism and the pressure applying impact mechanism are located in the supporting frame. The top of the transverse plate is fixedly connected with two triangular supports which are symmetrically arranged, through the clamping pressure-bearing mechanism and the pressure-applying impact mechanism, when static simulation is carried out, a servo motor is operated to carry out three-point loading on an anti-drilling rod sample through a pressure-applying block, and when a horizontal impact test is carried out, three-point loading is carried out on the anti-drilling rod sample through the pressure-applying block. The servo motor is operated to carry out impact test on the drill rod preventing sample through the impact plate, and when impact detection is carried out on the drill rod preventing sample in a motion state, a real rear-end collision scene is simulated, so that complex working conditions such as static pressure application, horizontal impact and impact in the drill rod preventing motion state can be comprehensively simulated.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, and particularly to a strength detection platform for an automobile rear lower protection device. Background Art

[0002] With the rapid development of the automotive industry, vehicle driving safety has become increasingly important. The rear lower protection device can prevent a rear-end vehicle from drilling under the car, reducing accident injuries. However, the quality of protection devices on the market varies. Currently, there is a lack of a professional, standard, and efficient detection platform to accurately evaluate their strength. Existing detection methods have problems such as low detection accuracy, complex operation, and inability to comprehensively simulate actual collision conditions, and cannot meet the industry's requirements for quality control of protection devices. Therefore, it is very necessary to develop a professional detection platform.

[0003] In the patent with the publication number CN118518382A, a strength detection platform for an automobile rear lower protection device is disclosed, which relates to the technical field of vehicle detection, and includes side plates and a detection main body. A lead screw assembly and a smooth rod are installed between two groups of side plates; the detection main body includes: an installation shell, a first connecting rod, a second connecting rod, a horizontal connecting rod, and a hydraulic telescopic test detection module. By designing a detection main body with a multi-link structure, it relies on a lifting adjustment assembly to drive the horizontal connecting rod to move upward. The horizontal connecting rod is restricted by the first connecting rod and the second connecting rod, so that when the horizontal connecting rod moves upward, a forward telescopic action is synchronously generated, thereby facilitating the hydraulic telescopic test detection module to be sent to a specified detection position to ensure an efficient static loading test of the automobile rear lower protection device.

[0004] However, the prior art similar to the above still has the following defects: Incomplete simulation of working conditions: Existing devices can only simulate simple static pressure application and horizontal impact, and it is difficult to simulate the impact of the anti-drilling rod in a moving state. Moreover, the conversion from static pressure application to horizontal impact and then to the impact of the anti-drilling rod in a moving state is relatively complex, affecting production efficiency and the coherence of detection. Therefore, a structure that can be simply adjusted and simulate different working conditions is required, which can comprehensively simulate complex working conditions such as static pressure application, horizontal impact, and the impact of the anti-drilling rod in a moving state, improve the accuracy and reliability of detection results, simplify the conversion process from one working condition to another, reduce the operation difficulty, and achieve the effect of improving production efficiency and detection coherence.

[0005] The bearing pressure angle of the anti-drill pipe cannot be adjusted: Existing devices generally can only apply pressure to the anti-drill pipe at a fixed angle and cannot simulate the diverse bearing pressure scenarios in actual use. For example, they cannot detect the strength changes of the anti-drill pipe at different inclination angles, resulting in a large deviation between the detection results and the actual situation and being unable to accurately evaluate its performance in complex working conditions. Therefore, it is necessary to set an adjustable bearing pressure angle for the anti-drill pipe to conduct impact detection under horizontal impact and moving states, accurately detect the strength changes of the anti-drill pipe at different inclination angles, make the detection results more in line with the actual situation, accurately evaluate its performance in complex working conditions, and achieve the effect of improving product reliability. Summary of the Invention

[0006] In view of the problems existing in the prior art, such as incomplete simulation of working conditions and inability to adjust the bearing pressure angle of the anti-drill pipe, a strength detection platform for an automobile rear underrun protection device is proposed.

[0007] This application provides a strength detection platform for an automobile rear underrun protection device, and its purpose is: Through the provided clamping and bearing pressure mechanism and pressure application and impact mechanism, complex working conditions such as static pressure application, horizontal impact, and impact under the moving state of the anti-drill pipe can be comprehensively simulated, improving the accuracy and reliability of the detection results, simplifying the conversion process from one working condition to another, reducing the operation difficulty, achieving the effect of improving production efficiency and detection coherence, and through adjusting the bearing pressure angle of the anti-drill pipe, the strength changes of the anti-drill pipe at different inclination angles can be accurately detected, making the detection results more in line with the actual situation, accurately evaluating its performance in complex working conditions, and achieving the effect of improving product reliability.

[0008] The technical solution of the present invention is: A strength detection platform for an automobile rear underrun protection device, including a support frame, a control console arranged on one side of the support frame, and a clamping and bearing pressure mechanism and a pressure application and impact mechanism located inside the support frame. The pressure application and impact mechanism includes a cross plate fixedly connected to the support frame. Two symmetrically arranged triangular frames are fixedly connected to the top of the cross plate. The clamping and bearing pressure mechanism includes an adjustment component rotatably connected to the inner wall of the triangular frame, and a clamping component and an anti-drill pipe specimen sequentially arranged above the adjustment component. The clamping component is used to adjust the bearing pressure angle of the anti-drill pipe specimen, and the adjustment component is used to adjust the bearing pressure mode of the anti-drill pipe specimen; The adjustment component includes a connecting wheel rotatably connected to the inner wall of the triangular frame. A rotating groove is opened in the inner wall of the connecting wheel. A rotating rod is rotatably connected to the inner wall of the rotating groove. One end of the connecting wheel away from the rotating rod is fixedly connected to a first driving threaded rod. The rotating rod and the first driving threaded rod are respectively rotatably connected to both ends of the support frame. A clamping groove is opened in the inner wall of the connecting wheel, and a clamping hole is opened in the inner wall of the rotating rod. The clamping groove and the clamping hole are in corresponding positions. An insertion bolt is installed between the inner walls of the clamping groove and the clamping hole.

[0009] With the above - mentioned solution, the provided adjustment component can adjust the bearing angle of the anti - drill pipe specimen by using the clamping component to simulate different actual working conditions. When it is necessary to change the bearing mode, rotate the rotating rod. Since the connecting wheel is rotatably connected to the rotating rod through the rotating groove and the insertion bolt is installed in the clamping groove, the rotation of the rotating rod will drive the connecting wheel to rotate. When the connecting wheel rotates, the first driving threaded rod fixedly connected to it will also rotate, thereby realizing the adjustment of the bearing mode of the anti - drill pipe specimen. The cross - plate and the tripod in the pressure - applying impact mechanism provide a stable support structure for the entire adjustment process. Through the above adjustment of the angle and bearing mode of the anti - drill pipe specimen, and then applying corresponding pressure and impact by the pressure - applying impact mechanism, the strength of the rear under - run protection device of the vehicle is detected to ensure that it meets the safety standards.

[0010] Further, the clamping component includes a clamping table threadedly connected between two first driving threaded rods. The top of the clamping table is fixedly connected with two groups of positioning components arranged symmetrically. Each group of the positioning components includes a first positioning rod, a second positioning rod, and a third positioning rod. Adjusting nuts are threadedly connected to the outer walls of the two groups of positioning components, and the adjusting nuts are used to adjust the height of the anti - drill pipe specimen.

[0011] Further, the first positioning rod, the second positioning rod, and the third positioning rod are successively closer to the connecting wheel, and both ends of the anti - drill pipe specimen are respectively fixed on the two groups of positioning components.

[0012] With the above - mentioned solution, by setting the clamping component, the anti - drill pipe specimen is installed between two third positioning rods, and tests in a parallel state can be carried out, and its height can be adjusted by the adjusting nut. In addition, when one end of the anti - drill pipe specimen is installed on the third positioning rod and the other end is installed on the second positioning rod, the anti - drill pipe specimen can be tilted at a certain angle; when one end of the anti - drill pipe specimen is installed on the third positioning rod and the other end is installed on the first positioning rod, the anti - drill pipe specimen can be tilted at a larger angle. Through such a setting, the strength change of the anti - drill pipe specimen at different tilt angles can be accurately detected.

[0013] Further, the pressure - applying impact mechanism further includes two second driving threaded rods rotatably connected to the inner wall of the support frame, and a biasing component is threadedly connected between the two second driving threaded rods.

[0014] Further, the biasing component includes a pressure - applying impact frame threadedly connected between the outer walls of the two second driving threaded rods. Two first positioning bolts, two second positioning bolts, two third positioning bolts, two fourth positioning bolts, and one fifth positioning bolt are successively threadedly connected to the inner wall of the pressure - applying impact frame from both sides to the middle.

[0015] Furthermore, a group of pressure blocks are threadedly connected on the outer walls of any three adjacent ones of the two third positioning bolts, the two fourth positioning bolts and the fifth positioning bolt.

[0016] Furthermore, an impact plate is threadedly connected on the outer wall of any adjacent five of the two first positioning bolts, the two second positioning bolts, the two third positioning bolts, the two fourth positioning bolts and the fifth positioning bolt.

[0017] By adopting the above scheme, the two second drive threaded rods can be driven to rotate through the set pressure impact mechanism. Since the pressure impact frame of the offset assembly is threadedly connected between the outer walls of the two second drive threaded rods, the rotation of the second drive threaded rod will drive the pressure impact frame to move along its axial direction. If a pressure test is to be performed on the anti-drill rod sample, a set of pressure blocks can be threadedly connected to the outer walls of any three adjacent ones of the two third positioning bolts, the two fourth positioning bolts and the fifth positioning bolts, and pressure is applied to the anti-drill rod sample by means of the pressure blocks. If an impact test is to be performed, the impact plate can be threadedly connected to the outer walls of any five adjacent ones of the two first positioning bolts, the two second positioning bolts, the two third positioning bolts, the two fourth positioning bolts and the fifth positioning bolts, and the anti-drill rod sample can be impacted by the impact plate to detect its strength and evaluate whether the rear lower protection device of the vehicle meets the standards.

[0018] Furthermore, a first toothed transmission belt is transmission-connected between the two first drive threaded rods, and the first toothed transmission belt is arranged outside the support frame, wherein one end of one of the first drive threaded rods close to the first toothed transmission belt is fixedly connected to a handwheel.

[0019] By adopting the above solution, the position of the anti-drilling rod sample can be adjusted by means of a hand wheel, through the first toothed transmission belt and the first driving threaded rod.

[0020] Furthermore, a second toothed transmission belt is connected between the two second driving threaded rods and the two rotating rods, and the second toothed transmission belt is arranged on the outside of the support frame close to the console, and one end of one of the rotating rods close to the second toothed transmission belt is fixedly connected to a servo motor, and the servo motor is fixedly installed on the outer wall of the console.

[0021] By adopting the above solution, the two second driving threaded rods and the two rotating rods can be driven to rotate together through the second toothed transmission belt by the provided servo motor.

[0022] Beneficial effects of the present invention: Through the provided clamping and pressure-bearing mechanism and pressure-applying and impact mechanism, when conducting static simulation, install the drill pipe sample between two third positioning rods and adjust its height by adjusting the nuts. At this time, do not install the plug bolts, keep the rotating rod and the connecting wheel in a rotating state, and adjust the position of the drill pipe sample through the handwheel via the first toothed transmission belt and the first driving threaded rod. Operate the servo motor to perform three-point loading on the drill pipe sample through the pressure block. When conducting horizontal impact testing, operate the servo motor to conduct impact testing on the drill pipe sample through the impact plate. When conducting impact detection on the drill pipe sample in a moving state, install the plug bolts at the clamping groove to connect the rotating rod and the first driving threaded rod into a whole, simulating a real rear-end collision scenario. Thus, complex working conditions such as static pressure application, horizontal impact, and impact under the moving state of the drill pipe can be comprehensively simulated, improving the accuracy and reliability of the detection results, and achieving seamless switching through mechanical linkage, reducing equipment redundancy.

[0023] Through the provided adjustment component, when it is necessary to change the pressure-bearing mode, rotate the rotating rod. Since the connecting wheel is rotationally connected to the rotating rod through the rotating groove and the plug bolts are installed in the clamping groove, the rotation of the rotating rod will drive the connecting wheel to rotate. When the connecting wheel rotates, the first driving threaded rod fixedly connected to it will also rotate, thereby realizing the adjustment of the pressure-bearing mode of the drill pipe sample. The cross plate and the tripod in the pressure-applying and impact mechanism provide a stable support structure for the entire adjustment process. Through the above adjustment of the angle and pressure-bearing mode of the drill pipe sample, and then applying corresponding pressure and impact by the pressure-applying and impact mechanism, the strength of the rear underrun protection device of the vehicle is detected to ensure that it meets the safety standards.

[0024] Through the provided clamping component, install the drill pipe sample between two third positioning rods to conduct tests in a parallel state and adjust its height by adjusting the nuts. In addition, when one end of the drill pipe sample is installed on the third positioning rod and the other end is installed on the second positioning rod, the drill pipe sample can be tilted at a certain angle; when one end of the drill pipe sample is installed on the third positioning rod and the other end is installed on the first positioning rod, the drill pipe sample can be tilted at a larger angle. Through such a setting, the strength change of the drill pipe sample at different tilt angles can be accurately detected. Description of the Drawings

[0025] Figure 1 It is a schematic diagram of the overall structure at the support frame and console of the present invention; Figure 2 It is a schematic diagram of the structure at the clamping and pressure-bearing mechanism of the present invention; Figure 3 It is a schematic diagram of the structure at the drill pipe sample of the present invention; Figure 4 It is a schematic diagram of the structure at the clamping component of the present invention; Figure 5Schematic diagram of the anti-drill pipe specimen of the present invention in different inclination angle states; Figure 6 Schematic diagram of the structure at the second driving threaded rod of the present invention; Figure 7 Schematic diagram of the installation position state of the pressing block of the present invention; Figure 8 Schematic diagram of the installation position state of the impact plate of the present invention; Figure 9 Schematic diagram of the structure at the tripod of the present invention; Figure 10 Schematic diagram of the structure at the handwheel of the present invention; Figure 11 Schematic diagram of the structure at the servo motor of the present invention.

[0026] In the figure: 1, support frame; 2, console; 3, clamping and pressure-bearing mechanism; 31, clamping assembly; 311, clamping table; 312, adjusting nut; 313, first positioning rod; 314, second positioning rod; 315, third positioning rod; 32, anti-drill pipe specimen; 33, adjusting assembly; 331, first driving threaded rod; 332, connecting wheel; 333, rotating groove; 334, clamping groove; 335, plugging bolt; 34, rotating rod; 35, first toothed transmission belt; 36, handwheel; 4, pressing and impact mechanism; 41, second driving threaded rod; 42, offset assembly; 421, pressing and impact frame; 422, first positioning bolt; 423, second positioning bolt; 424, third positioning bolt; 425, fourth positioning bolt; 426, fifth positioning bolt; 43, pressing block; 44, impact plate; 45, cross plate; 46, tripod; 47, second toothed transmission belt; 48, servo motor. Detailed implementation manners

[0027] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings of the specification.

[0028] Referring to Figure 1 - Figure 11 , a strength detection platform for an automobile rear lower protection device is provided, including a support frame 1, a console 2 arranged on one side of the support frame 1, and a clamping and pressure-bearing mechanism 3 and a pressing and impact mechanism 4 located inside the support frame 1. The pressing and impact mechanism 4 includes a cross plate 45 fixedly connected to the support frame 1, and two symmetrically arranged tripods 46 are fixedly connected to the top of the cross plate 45. The clamping and pressure-bearing mechanism 3 includes an adjusting assembly 33 rotatably connected to the inner wall of the tripod 46, and a clamping assembly 31 and an anti-drill pipe specimen 32 sequentially arranged above the adjusting assembly 33. The clamping assembly 31 is used to adjust the pressure-bearing angle of the anti-drill pipe specimen 32, and the adjusting assembly 33 is used to adjust the pressure-bearing mode of the anti-drill pipe specimen 32.

[0029] Referring to Figure 3 - Figure 5 , the adjusting assembly 33 includes a connecting wheel 332 rotatably connected to the inner wall of the tripod 46. A rotating groove 333 is formed in the inner wall of the connecting wheel 332. A rotating rod 34 is rotatably connected to the inner wall of the rotating groove 333. One end of the connecting wheel 332 away from the rotating rod 34 is fixedly connected to a first driving threaded rod 331. The rotating rod 34 and the first driving threaded rod 331 are respectively rotatably connected to both ends of the support frame 1. A clamping groove 334 is formed in the inner wall of the connecting wheel 332, and a clamping hole is formed in the inner wall of the rotating rod 34. The clamping groove 334 corresponds to the position of the clamping hole, and a plugging bolt 335 is installed between the inner walls of the clamping groove 334 and the clamping hole.

[0030] The tripod 46 can significantly enhance the ability to resist lateral torsion. During the offset impact test, the impact force will generate torque, and the tripod 46 avoids the deformation of the support structure through geometric stability to ensure the accuracy of the test data.

[0031] Specifically, when the plugging bolt 335 is not installed, the rotating rod 34 rotates in the rotating groove 333 of the connecting wheel 332. The first driving threaded rod 331 and the rotating rod 34 are divided into two parts and do not interfere with each other, and static simulation and horizontal impact tests can be carried out. After the plugging bolt 335 is installed, the rotating rod 34 and the first driving threaded rod 331 are integrated. When the rotating rod 34 rotates, it drives the first driving threaded rod 331 to rotate together, and the impact detection under the moving state of the anti-drill pipe specimen 32 can be carried out.

[0032] Through the provided adjusting assembly 33, for the anti-drill pipe specimen 32, the clamping assembly 31 can be used to adjust its bearing angle to simulate different actual working conditions. When it is necessary to change the bearing mode, rotate the rotating rod 34. Since the connecting wheel 332 is rotatably connected to the rotating rod 34 through the rotating groove 333, and the plugging bolt 335 is installed in the clamping groove 334, the rotation of the rotating rod 34 will drive the connecting wheel 332 to rotate. When the connecting wheel 332 rotates, the first driving threaded rod 331 fixedly connected to it will also rotate, thereby realizing the adjustment of the bearing mode of the anti-drill pipe specimen 32. The cross plate 45 and the tripod 46 in the pressure-applying impact mechanism 4 provide a stable support structure for the entire adjustment process. Through the above adjustment of the angle and bearing mode of the anti-drill pipe specimen 32, and then applying corresponding pressure and impact by the pressure-applying impact mechanism 4, the strength of the rear underrun protection device of the vehicle is detected to ensure that it meets the safety standards. By whether to install the plugging bolt 335, the separation (static test) or linkage (dynamic rear-end collision simulation) of the rotating rod 34 and the first driving threaded rod 331 is realized, greatly simplifying the complexity of mode switching.

[0033] Referring to Figure 3 - Figure 5, the clamping assembly 31 includes a clamping table 311 threadedly connected between two first driving threaded rods 331. A symmetrically arranged two - group positioning assembly is fixedly connected to the top of the clamping table 311. Each of the two - group positioning assemblies includes a first positioning rod 313, a second positioning rod 314, and a third positioning rod 315. Adjusting nuts 312 are threadedly connected to the outer walls of the two - group positioning assemblies. The adjusting nuts 312 are used to adjust the height of the anti - drilling rod specimen 32. The first positioning rod 313, the second positioning rod 314, and the third positioning rod 315 are sequentially close to the connecting wheel 332. Both ends of the anti - drilling rod specimen 32 are respectively fixed on the two - group positioning assemblies.

[0034] Specifically, the clamping table 311 is threadedly connected between the two first driving threaded rods 331. When the first driving threaded rods 331 rotate, they will drive the clamping table 311 to move. The adjusting nut 312 can change its position on the positioning assembly to further adjust the height of the anti - drilling rod specimen 32. The first positioning rod 313 and the second positioning rod 314 on one side are both arranged on an arc with the third positioning rod 315 on the other side as the center of the circle. One end of the anti - drilling rod specimen 32 is fixed on one of the third positioning rods 315, and the other end can be fixed on the first positioning rod 313, the second positioning rod 314, or the third positioning rod 315 of the positioning assembly on the other side according to the detection requirements. Such a design enables the anti - drilling rod specimen 32 to present different inclination angles to simulate the situation of diagonal rear - end collision during actual use. Of course, more positioning rods can be provided in the positioning assembly according to needs. If a new test angle is required, only a positioning rod needs to be added on the arc, without changing the overall structure.

[0035] By fixing one end of the anti - drilling rod specimen 32 on the third positioning rod 315 and selecting different positions (the first positioning rod 313 or the second positioning rod 314) of the positioning assembly on the other side, a preset inclination angle (such as Figure 5As shown). The arc layout ensures the geometric consistency of the angle change, avoids the non-linear angle deviation caused by the linear arrangement, and makes the test conditions more conform to the inclined state during the actual vehicle installation. In addition, both the first positioning rod 313 and the second positioning rod 314 on one side are arranged on the arc with the third positioning rod 315 on the other side as the center of the circle. Such an arc arrangement makes the length of the anti-drill rod specimen 32 constant. Only by switching the fixed points can the angle be changed, without the need to additionally adjust the length of the anti-drill rod specimen 32 or re-calibrate. This design significantly improves the test efficiency, especially suitable for repetitive experiments that require frequent angle switching. Also, the arc layout here simulates the force-bearing scenario of the real vehicle protection device. When the anti-drill rod specimen 32 is inclined, the impact load will be decomposed along the axial and radial directions of the anti-drill rod specimen 32. The arc positioning ensures that the direction of the decomposed force is consistent with that during the actual vehicle collision (such as the oblique force during a rear-end collision). Compared with the linear arrangement, the arc can more realistically reflect the moment distribution in the inclined state. At the same time, the arc arrangement of the first positioning rod 313, the second positioning rod 314, and the third positioning rod 315 in one side positioning component is not only used for angle adjustment but also implies an anti-misoperation function: Since the distances between the third positioning rod 315 in one side positioning component and the first positioning rod 313, the second positioning rod 314, and the third positioning rod 315 in the opposite positioning component are constant, when the operator installs the anti-drill rod specimen 32, there is no need to measure the length. Only by selecting the corresponding first positioning rod 313, second positioning rod 314, or third positioning rod 315 at the corresponding angle can it be automatically aligned, avoiding human installation errors.

[0036] Through the provided clamping component 31, the anti-drill rod specimen 32 is installed between the two third positioning rods 315, and the test in the parallel state can be carried out, and its height can be adjusted by the adjusting nut 312. In addition, when one end of the anti-drill rod specimen 32 is installed on the third positioning rod 315 and the other end is installed on the second positioning rod 314, the anti-drill rod specimen 32 can be inclined at a certain angle; when one end of the anti-drill rod specimen 32 is installed on the third positioning rod 315 and the other end is installed on the first positioning rod 313, the anti-drill rod specimen 32 can be inclined at a larger angle. Through such a setting, the strength change of the anti-drill rod specimen 32 at different inclined angles can be accurately detected.

[0037] Refer to Figure 6 - Figure 9, the pressure - applying and impact mechanism 4 further includes two second driving threaded rods 41 rotatably connected to the inner wall of the support frame 1. A biasing assembly 42 is thread - connected between the two second driving threaded rods 41. The biasing assembly 42 includes a pressure - applying and impact frame 421 thread - connected between the outer walls of the two second driving threaded rods 41. Inside the inner wall of the pressure - applying and impact frame 421, two first positioning bolts 422, two second positioning bolts 423, two third positioning bolts 424, two fourth positioning bolts 425, and one fifth positioning bolt 426 are sequentially thread - connected from both sides to the middle. A set of pressure - applying blocks 43 are thread - connected to the outer walls of any three adjacent ones of the two third positioning bolts 424, two fourth positioning bolts 425, and the fifth positioning bolt 426. An impact plate 44 is thread - connected to the outer walls of any five adjacent ones of the two first positioning bolts 422, two second positioning bolts 423, two third positioning bolts 424, two fourth positioning bolts 425, and the fifth positioning bolt 426.

[0038] Specifically, three - point loading is used in mechanical analysis. Three support points or force - bearing points bear external loads to test strength and stability. By selecting the installation positions of the third positioning bolt 424, the fourth positioning bolt 425, and the fifth positioning bolt 426, etc., the pressure - applying block 43 can achieve various test conditions such as frontal impact, offset at a certain angle, and offset at a larger angle, without additional hardware adjustment. If a sixth positioning bolt is added, more offset - angle tests can be extended.

[0039] By setting the pressure - applying and impact mechanism 4, the two second driving threaded rods 41 can be driven to rotate. Since the pressure - applying and impact frame 421 of the biasing assembly 42 is thread - connected between the outer walls of the two second driving threaded rods 41, the rotation of the second driving threaded rods 41 will drive the pressure - applying and impact frame 421 to move along its axial direction. If a pressure - applying test is to be carried out on the anti - drilling rod specimen 32, a set of pressure - applying blocks 43 can be thread - connected to the outer walls of any three adjacent ones of the two third positioning bolts 424, two fourth positioning bolts 425, and the fifth positioning bolt 426, and the pressure - applying blocks 43 are used to apply pressure to the anti - drilling rod specimen 32. If an impact test is to be carried out, the impact plate 44 can be thread - connected to the outer walls of any five adjacent ones of the two first positioning bolts 422, two second positioning bolts 423, two third positioning bolts 424, two fourth positioning bolts 425, and the fifth positioning bolt 426, and the anti - drilling rod specimen 32 is impacted by the impact plate 44 to detect its strength and evaluate whether the rear - lower protection device of the vehicle meets the standards.

[0040] The device of the present invention is suitable for strength testing in multiple modes such as static, impact and simulated rear-end collision; the present invention uses the second drive threaded rod 41 to drive, which is suitable for slower impact tests, and has the advantage of transmission ratio. Other acceleration methods will lose this feature of the adjustment component 33. Specifically, the second drive threaded rod 41 can achieve high-precision position control. By controlling the number of rotations and direction of the servo motor 48, the impact component can be accurately moved to a specific position. This feature allows the impact to be applied at a precise position to ensure the consistency and repeatability of each test. In addition, the second drive threaded rod 41 drives the process of converting the rotational motion of the servo motor 48 into linear motion in a relatively smooth manner, with less vibration and noise throughout the process, so that the test results more truly reflect the actual performance. In addition, for different levels of impact tests, the second drive threaded rod 41 can achieve precise control of the impact force by adjusting the parameters of the servo motor 48 to meet diverse needs.

[0041] Reference Figure 10 A first toothed transmission belt 35 is connected between the two first driving threaded rods 331 , and the first toothed transmission belt 35 is arranged outside the support frame 1 , wherein one end of one of the first driving threaded rods 331 close to the first toothed transmission belt 35 is fixedly connected to a hand wheel 36 .

[0042] The position of the anti-drilling rod sample 32 can be adjusted by means of a hand wheel 36 via the first toothed transmission belt 35 and the first driving threaded rod 331 .

[0043] Reference Figure 11 A second toothed transmission belt 47 is connected between the two second driving threaded rods 41 and the two rotating rods 34. The second toothed transmission belt 47 is arranged on the outside of the support frame 1 close to the console 2. One end of one of the rotating rods 34 close to the second toothed transmission belt 47 is fixedly connected to a servo motor 48, and the servo motor 48 is fixedly installed on the outer wall of the console 2.

[0044] The servo motor 48 can drive the two second drive threaded rods 41 and the two rotating rods 34 to rotate together through the second toothed transmission belt 47, which reduces synchronization error and energy consumption compared to a multi-motor system. The first toothed transmission belt 35 and the second toothed transmission belt 47 are placed outside the support frame 1 to facilitate quick maintenance and tension adjustment, and also to prevent metal debris flying during the test from interfering with the transmission, such as debris that may be generated by an impact test.

[0045] During use, the anti-drill pipe specimen 32 is installed on the clamping table 311 by means of the adjusting nut 312. The two ends of the anti-drill pipe specimen 32 are installed at different positions of the positioning assembly, which can simulate different working conditions. When performing static simulation, the anti-drill pipe specimen 32 is installed between the two third positioning rods 315, and its height is adjusted by the adjusting nut 312. At this time, the plug bolt 335 is not installed, and the rotating rod 34 and the connecting wheel 332 are in a rotating state. The position of the anti-drill pipe specimen 32 is adjusted by the hand wheel 36 through the first toothed transmission belt 35 and the first driving threaded rod 331. Then, a set of pressing blocks 43 are threadedly connected to the outer walls of any three adjacent ones of the two third positioning bolts 424, the two fourth positioning bolts 425, and the fifth positioning bolt 426. When performing a horizontal impact test, first remove the pressing block 43, and then threadedly connect the impact plate 44 to the outer walls of any five adjacent ones of the two first positioning bolts 422, the two second positioning bolts 423, the two third positioning bolts 424, the two fourth positioning bolts 425, and the fifth positioning bolt 426. Run the servo motor 48 in the reverse direction to make the pressing and impact frame 421 approach the servo motor 48. Then, the servo motor 48 outputs power to make the impact plate 44 perform an impact test on the anti-drill pipe specimen 32. When performing an impact detection on the anti-drill pipe specimen 32 in a moving state, install the plug bolt 335 at the clamping groove 334 to connect the rotating rod 34 and the first driving threaded rod 331 into a whole. When the servo motor 48 is run to drive the impact plate 44 to perform an impact, a real rear-end collision scenario can be simulated. In addition, by installing the anti-drill pipe specimen 32 at different positions on the two-side positioning assemblies, the strength change of the anti-drill pipe specimen 32 at different inclination angles can be accurately detected.

[0046] The working principle of the present invention: During operation, the anti-drill pipe specimen 32 is installed on the clamping table 311 by means of the adjusting nut 312. The two ends of the anti-drill pipe specimen 32 are installed at different positions of the positioning assembly, which can simulate different working conditions.

[0047] When performing static simulation, the anti-drill pipe specimen 32 is installed between the two third positioning rods 315, and its height is adjusted by the adjusting nut 312. At this time, the plug bolt 335 is not installed, and the rotating rod 34 and the connecting wheel 332 are in a rotating state. The position of the anti-drill pipe specimen 32 is adjusted by the hand wheel 36 through the first toothed transmission belt 35 and the first driving threaded rod 331. Then, a set of pressing blocks 43 are threadedly connected to the outer walls of any three adjacent ones of the two third positioning bolts 424, the two fourth positioning bolts 425, and the fifth positioning bolt 426.

[0048] Turn on the servo motor 48. The output shaft of the servo motor 48 drives two second driving threaded rods 41 and two rotating rods 34 to rotate together through the second toothed transmission belt 47. The second driving threaded rod 41 performs three-point loading on the anti-drill rod specimen 32 through the pressure application impact frame 421 and the pressure application block 43, completes the static simulation and obtains the test data.

[0049] When performing the horizontal impact test, first remove the pressure application block 43, and then threadedly connect the impact plate 44 to the outer walls of any five adjacent ones among the two first positioning bolts 422, two second positioning bolts 423, two third positioning bolts 424, two fourth positioning bolts 425 and the fifth positioning bolt 426. Run the servo motor 48 in reverse to make the pressure application impact frame 421 close to the servo motor 48. Then, the servo motor 48 outputs power to make the impact plate 44 perform an impact test on the anti-drill rod specimen 32. When the center position of the impact plate 44 coincides with the fifth positioning bolt 426, a completely frontal impact test is performed; when the center position of the impact plate 44 coincides with the third positioning bolt 424 on one side, an impact test with a certain offset angle is performed; when the center position of the impact plate 44 coincides with the second positioning bolt 423 on one side, an impact test with a larger offset angle is performed.

[0050] When performing the impact detection of the anti-drill rod specimen 32 in a moving state, install the plug bolt 335 at the clamping groove 334 to connect the rotating rod 34 and the first driving threaded rod 331 into a whole. At the same time, set the pitch ratio of the first driving threaded rod 331 and the second driving threaded rod 41 so that the anti-drill rod specimen 32 and the impact plate 44 can obtain different moving speeds. In this way, when the servo motor 48 is run to drive the impact plate 44 to perform an impact, the anti-drill rod specimen 32 will move in the same direction at a certain proportional speed, thereby simulating the relative speed of a real rear-end collision scenario. By pre-calculating and adjusting this pitch ratio, it meets the collision speed conditions required by different regulations (such as the collision energy equivalent speed specified in the EU ECER29 - 03 standard).

[0051] In addition, when one end of the anti-drill rod specimen 32 is installed on the third positioning rod 315 and the other end is installed on the second positioning rod 314, the anti-drill rod specimen 32 can be tilted at a certain angle; when one end of the anti-drill rod specimen 32 is installed on the third positioning rod 315 and the other end is installed on the first positioning rod 313, the anti-drill rod specimen 32 can be tilted at a larger angle. Through such a setting, the strength change of the anti-drill rod specimen 32 at different tilt angles can be accurately detected.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A vehicle rear lower protection device strength testing platform, comprising a support frame (1), a control console (2) arranged on one side of the support frame (1), and a clamping pressure-bearing mechanism (3) and a pressure-applying impact mechanism (4) located inside the support frame (1), characterized in that: The pressure impact mechanism (4) comprises a horizontal plate (45) fixedly connected to the support frame (1), the top of the horizontal plate (45) is fixedly connected to two symmetrically arranged tripods (46), the clamping pressure bearing mechanism (3) comprises an adjustment component (33) rotatably connected to the inner wall of the tripod (46), and a clamping component (31) and an anti-drill rod sample (32) sequentially arranged above the adjustment component (33), the clamping component (31) is used to adjust the pressure bearing angle of the anti-drill rod sample (32), and the adjustment component (33) is used to adjust the pressure bearing mode of the anti-drill rod sample (32); The adjustment assembly (33) comprises a connecting wheel (332) rotatably connected to the inner wall of the tripod (46); a rotating groove (333) is provided on the inner wall of the connecting wheel (332); a rotating rod (34) is rotatably connected to the inner wall of the rotating groove (333); an end of the connecting wheel (332) away from the rotating rod (34) is fixedly connected to a first driving threaded rod (331); the rotating rod (34) and the first driving threaded rod (331) are rotatably connected to two ends of the support frame (1) respectively; a clamping groove (334) is provided on the inner wall of the connecting wheel (332); a clamping hole is provided on the inner wall of the rotating rod (34); the clamping groove (334) corresponds to the position of the clamping hole; and a plug bolt (335) is installed between the clamping groove (334) and the inner wall of the clamping hole.

2. The vehicle rear lower protection device strength testing platform according to claim 1, characterized in that: The clamping assembly (31) comprises a clamping platform (311) threadedly connected between two first driving threaded rods (331); two groups of positioning assemblies symmetrically arranged are fixedly connected to the top of the clamping platform (311); the two groups of positioning assemblies each comprise a first positioning rod (313), a second positioning rod (314) and a third positioning rod (315); and the outer walls of the two groups of positioning assemblies are threadedly connected with an adjusting nut (312); the adjusting nut (312) is used to adjust the height of the anti-drilling rod sample (32).

3. The vehicle rear lower protection device strength testing platform according to claim 2, characterized in that: The first positioning rod (313), the second positioning rod (314) and the third positioning rod (315) are sequentially close to the connecting wheel (332), and the two ends of the anti-drilling rod sample (32) are respectively fixed on two sets of positioning components.

4. The vehicle rear lower protection device strength testing platform according to claim 3, characterized in that: The pressure impact mechanism (4) further comprises two second drive threaded rods (41) rotatably connected to the inner wall of the support frame (1), and a biasing assembly (42) is threadedly connected between the two second drive threaded rods (41).

5. The vehicle rear lower protection device strength testing platform according to claim 4, characterized in that: The biasing assembly (42) comprises a pressure impact frame (421) threadedly connected between the outer walls of the two second drive threaded rods (41), and the inner wall of the pressure impact frame (421) is threadedly connected with two first positioning bolts (422), two second positioning bolts (423), two third positioning bolts (424), two fourth positioning bolts (425) and a fifth positioning bolt (426) in sequence from both sides to the middle.

6. The vehicle rear lower protection device strength testing platform according to claim 5, characterized in that: A group of pressure blocks (43) are threadedly connected on the outer walls of any three adjacent ones of the two third positioning bolts (424), the two fourth positioning bolts (425) and the fifth positioning bolt (426).

7. The vehicle rear lower protection device strength testing platform according to claim 5, characterized in that: An impact plate (44) is threadedly connected to the outer wall of any adjacent five of the two first positioning bolts (422), the two second positioning bolts (423), the two third positioning bolts (424), the two fourth positioning bolts (425) and the fifth positioning bolt (426).

8. The vehicle rear lower protection device strength testing platform according to claim 1, characterized in that: A first toothed transmission belt (35) is transmission-connected between the two first drive threaded rods (331); the first toothed transmission belt (35) is arranged outside the support frame (1); and a hand wheel (36) is fixedly connected to one end of one of the first drive threaded rods (331) close to the first toothed transmission belt (35).

9. The vehicle rear lower protection device strength testing platform according to claim 4, characterized in that: A second toothed transmission belt (47) is transmission-connected between the two second drive threaded rods (41) and the two rotating rods (34); the second toothed transmission belt (47) is arranged outside the support frame (1) close to the control console (2); one end of one of the rotating rods (34) close to the second toothed transmission belt (47) is fixedly connected to a servo motor (48); the servo motor (48) is fixedly mounted on the outer wall of the control console (2).

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