A vehicle rear lower protection device strength testing platform

Abstract

The present invention relates to the field of vehicle detection technology, and discloses a strength detection platform for the rear lower protective device of an automobile, comprising a support frame, a control console arranged on one side of the support frame, and a clamping and pressure-bearing mechanism and a pressure-impacting mechanism located inside the support frame, wherein the pressure-impacting mechanism comprises a horizontal plate fixedly connected to the support frame, and two symmetrically arranged tripods are fixedly connected to the top of the horizontal plate. Through the provided clamping and pressure-bearing mechanism and the pressure-impacting mechanism, when static simulation is performed, a servo motor is operated to perform three-point loading on an anti-drill rod sample through a pressure block, and when horizontal impact test is performed, a servo motor is operated to perform impact test on the anti-drill rod sample through an impact plate, and when impact test is performed on the anti-drill rod sample in a moving state, a real rear-end collision scene is simulated, thereby comprehensively simulating complex working conditions such as static pressure, horizontal impact, and impact on the anti-drill rod in a moving state.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, in particular to a vehicle rear lower protection device strength detection platform. Background Art

[0002] With the rapid development of the automotive industry, vehicle driving safety is becoming increasingly important. Rear underbody protection devices can prevent rear-end vehicles from penetrating the bottom of the car, reducing accident damage. However, the quality of protective devices on the market varies greatly. Currently, there is a lack of professional, standard and efficient testing platforms to accurately evaluate their strength. Existing testing methods have problems such as low detection accuracy, complex operation, and inability to fully simulate actual collision conditions. They cannot meet the industry's demand for quality control of protective devices. Therefore, the development of a professional testing platform is very necessary.

[0003] Patent publication number CN118518382A discloses a vehicle rear lower guard strength testing platform, which relates to the field of vehicle testing technology. The platform comprises side panels, a testing body, and a screw assembly and a polished rod mounted between two sets of side panels. The testing body comprises a mounting housing, a first connecting rod, a second connecting rod, a horizontal connecting rod, and a hydraulic telescopic test module. By designing a multi-link testing body, the platform relies on a lifting and adjusting assembly to drive the horizontal connecting rod upward. The horizontal connecting rod is constrained by the first and second connecting rods, causing it to simultaneously telescope forward as it moves upward. This facilitates the delivery of the hydraulic telescopic test module to the designated testing position, ensuring efficient static load testing of the vehicle's rear lower guard.

[0004] However, similar to the above-mentioned prior art, there are still the following defects:

[0005] The simulated working conditions are not comprehensive: the existing device can only simulate simple static pressure and horizontal impact, and it is difficult to simulate the impact of the anti-drill rod in motion. The conversion from static pressure to horizontal impact and then to the impact of the anti-drill rod in motion is relatively complicated, which affects the production efficiency and the continuity of the detection. Therefore, it is necessary to set up a structure that can be simply adjusted and simulated to different working conditions, which can fully simulate complex working conditions such as static pressure, horizontal impact and impact of the anti-drill rod in motion, improve the accuracy and reliability of the detection results, and simplify the conversion process from one working condition to another, reduce the difficulty of operation, and achieve the effect of improving production efficiency and detection continuity.

[0006] Unable to adjust the pressure-bearing angle of the anti-drill rod: Existing devices can generally only apply pressure to the anti-drill rod at a fixed angle, and cannot simulate the diverse pressure-bearing scenarios in actual use. For example, it is impossible to detect the strength changes of the anti-drill rod at different inclination angles, resulting in a large deviation between the test results and the actual situation, and unable to accurately evaluate its performance in complex working conditions. Therefore, it is necessary to set an adjustable pressure-bearing angle of the anti-drill rod to perform impact tests under horizontal impact and motion conditions, accurately detect the strength changes of the anti-drill rod at different inclination angles, make the test results more in line with reality, accurately evaluate its performance in complex working conditions, and achieve the effect of improving product reliability. Summary of the Invention

[0007] In view of the problems in the existing technology such as incomplete simulation of working conditions and inability to adjust the pressure angle of the anti-drilling rod, a strength testing platform for the rear lower protection device of an automobile is proposed.

[0008] The present application provides a vehicle rear lower protection device strength testing platform, the purpose of which is: through the provided clamping pressure-bearing mechanism and the pressure-impacting mechanism, it can fully simulate complex working conditions such as static pressure, horizontal impact, and impact of the anti-drill rod in motion, thereby improving the accuracy and reliability of the test results, simplifying the conversion process from one working condition to another, reducing the difficulty of operation, and achieving the effect of improving production efficiency and test consistency. By adjusting the pressure-bearing angle of the anti-drill rod, the strength changes of the anti-drill rod at different inclination angles can be accurately detected, making the test results more in line with reality, accurately evaluating its performance under complex working conditions, and achieving the effect of improving product reliability.

[0009] The technical solution of the present invention is: a vehicle rear lower protection device strength testing platform, comprising a support frame, a control console arranged on one side of the support frame, and a clamping and pressure-bearing mechanism and a pressure-impacting mechanism located inside the support frame, wherein the pressure-impacting mechanism comprises a horizontal plate fixedly connected to the support frame, the top of the horizontal plate being fixedly connected to two symmetrically arranged tripods, the clamping and pressure-bearing mechanism comprising an adjustment assembly rotatably connected to the inner wall of the tripod, and a clamping assembly and an anti-drill rod sample sequentially arranged above the adjustment assembly, the clamping assembly being used to adjust the pressure-bearing angle of the anti-drill rod sample, and the adjustment assembly being used to adjust the pressure-bearing mode of the anti-drill rod sample;

[0010] The adjusting assembly includes a connecting wheel rotatably connected to the inner wall of the tripod, the inner wall of the connecting wheel is provided with a rotating groove, the inner wall of the rotating groove is rotatably connected to a rotating rod, the end of the connecting wheel away from the rotating rod is fixedly connected to the first driving threaded rod, the rotating rod and the first driving threaded rod are respectively rotatably connected to the two ends of the support frame, the inner wall of the connecting wheel is provided with a clamping groove, the inner wall of the rotating rod is provided with a clamping hole, the clamping groove and the clamping hole correspond in position, and a plug bolt is installed between the clamping groove and the inner wall of the clamping hole.

[0011] By adopting the above scheme, an adjustment component is set up, and for the anti-drill rod sample, the pressure-bearing angle can be adjusted by using the clamping component to simulate different actual working conditions. When the pressure-bearing mode needs to be changed, the rotating rod is rotated. Since the connecting wheel is rotatably connected to the rotating rod through the rotating groove, and a plug-in 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 thereto will also rotate, thereby realizing the adjustment of the pressure-bearing mode of the anti-drill rod sample. The cross plate and tripod in the pressure impact mechanism provide a stable support structure for the entire adjustment process. Through the above-mentioned adjustment of the angle and pressure-bearing mode of the anti-drill rod sample, the pressure impact mechanism applies corresponding pressure and impact to test the strength of the rear lower protective device of the vehicle to ensure that it meets safety standards.

[0012] Furthermore, the clamping assembly includes a clamping platform threadedly connected between two first driving threaded rods, and the top of the clamping platform is fixedly connected with two symmetrically arranged groups of positioning assemblies, and the two groups of positioning assemblies each include a first positioning rod, a second positioning rod and a third positioning rod, and the outer walls of the two groups of positioning assemblies are threadedly connected with an adjusting nut, and the adjusting nut is used to adjust the height of the anti-drill rod sample.

[0013] Furthermore, the first positioning rod, the second positioning rod and the third positioning rod are sequentially close to the connecting wheel, and both ends of the anti-drilling rod sample are respectively fixed on two sets of positioning components.

[0014] By adopting the above scheme, the anti-drill rod sample is installed between the two third positioning rods through the provided clamping assembly, and the test can be carried out in a parallel state, and its height can be adjusted by adjusting the nut. In addition, when one end of the anti-drill rod sample is installed on the third positioning rod and the other end is installed on the second positioning rod, the anti-drill rod sample can be tilted at a certain angle; when one end of the anti-drill rod sample is installed on the third positioning rod and the other end is installed on the first positioning rod, the anti-drill rod sample can be tilted at a larger angle. Through such a setting, the strength changes of the anti-drill rod sample at different inclination angles can be accurately detected.

[0015] Furthermore, the pressure impact mechanism also 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.

[0016] Furthermore, the biasing assembly includes a pressure impact frame threadedly connected between the outer walls of the two second drive threaded rods, and the inner wall of the pressure impact frame is threadedly connected with two first positioning bolts, two second positioning bolts, two third positioning bolts, two fourth positioning bolts and one fifth positioning bolt in sequence from both sides to the middle.

[0017] 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.

[0018] Furthermore, an impact plate is threadedly connected to the outer wall 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 bolt.

[0019] 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 biasing 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 the anti-drill rod sample is to be pressure tested, 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 is impacted by the impact plate to detect its strength and evaluate whether the rear lower protection device of the vehicle meets the standards.

[0020] Furthermore, a first toothed transmission belt is connected between the two first drive threaded rods, and the first toothed transmission belt is arranged outside the support frame, and one end of one of the first drive threaded rods close to the first toothed transmission belt is fixedly connected to a handwheel.

[0021] With the above solution, the position of the anti-drilling rod sample can be adjusted by the provided hand wheel via the first toothed transmission belt and the first driving threaded rod.

[0022] Furthermore, a second toothed transmission belt is connected between the two second drive 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.

[0023] By adopting the above solution, the two second driving threaded rods and the two rotating rods can be driven to rotate together via the second toothed transmission belt by the provided servo motor.

[0024] Beneficial effects of the present invention:

[0025] By setting up the clamping pressure-bearing mechanism and the pressure-impacting mechanism, when performing static simulation, the anti-drill rod sample is installed between the two third positioning rods, and its height is adjusted by adjusting the nut. At this time, the plug-in bolts are not installed, so that the rotating rod and the connecting wheel are in a rotating state, and the position of the anti-drill rod sample is adjusted by the handwheel through the first toothed transmission belt and the first drive threaded rod. The servo motor is operated to perform three-point loading on the anti-drill rod sample through the pressure block. When performing horizontal impact test, the servo motor is operated to perform impact test on the anti-drill rod sample through the impact plate. When performing impact detection in the moving state of the anti-drill rod sample, the plug-in bolts are installed at the clamping groove to connect the rotating rod and the first drive threaded rod into a whole to simulate a real rear-end collision scene. In this way, complex working conditions such as static pressure, horizontal impact and impact in the moving state of the anti-drill rod can be fully simulated, thereby improving the accuracy and reliability of the test results, and achieving seamless switching through mechanical linkage to reduce equipment redundancy.

[0026] Through the provided adjustment component, when the pressure-bearing mode needs to be changed, the rotating rod is rotated. Since the connecting wheel is rotatably connected to the rotating rod through the rotating groove, and a plug-in 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 thereto will also rotate, thereby realizing the adjustment of the pressure-bearing mode of the anti-drill rod sample. The cross plate and tripod in the pressure impact mechanism provide a stable support structure for the entire adjustment process. Through the above-mentioned adjustment of the angle and pressure-bearing mode of the anti-drill rod sample, the pressure impact mechanism applies corresponding pressure and impact to detect the strength of the rear lower protective device of the vehicle to ensure that it meets the safety standards.

[0027] By setting up a clamping assembly, the anti-drill rod sample is installed between the two third positioning rods, and the test can be carried out in a parallel state, and its height can be adjusted by adjusting the nut. In addition, when one end of the anti-drill rod sample is installed on the third positioning rod and the other end is installed on the second positioning rod, the anti-drill rod sample can be tilted at a certain angle; when one end of the anti-drill rod sample is installed on the third positioning rod and the other end is installed on the first positioning rod, the anti-drill rod sample can be tilted at a larger angle. Through such a setting, the strength changes of the anti-drill rod samples at different inclination angles can be accurately detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the overall structure of the support frame and the console of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the clamping and pressure-bearing mechanism of the present invention;

[0030] Figure 3 This is a structural diagram of the anti-drilling rod sample of the present invention;

[0031] Figure 4It is a structural schematic diagram of the clamping assembly of the present invention;

[0032] Figure 5 Schematic diagram of the anti-drilling rod specimen of the present invention at different tilt angles;

[0033] Figure 6 This is a structural schematic diagram of the second driving threaded rod of the present invention;

[0034] Figure 7 This is a schematic diagram of the installation position of the pressure block of the present invention;

[0035] Figure 8 This is a schematic diagram of the installation position of the impact plate of the present invention;

[0036] Figure 9 This is a schematic diagram of the tripod structure of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of the hand wheel of the present invention;

[0038] Figure 11 It is a structural schematic diagram of the servo motor of the present invention.

[0039] In the picture:

[0040] 1. Support frame; 2. Control console; 3. Clamping pressure mechanism; 31. Clamping assembly; 311. Clamping platform; 312. Adjusting nut; 313. First positioning rod; 314. Second positioning rod; 315. Third positioning rod; 32. Anti-drilling rod specimen; 33. Adjusting assembly; 331. First driving threaded rod; 332. Connecting wheel; 333. Rotation groove; 334. Clamping groove; 335. Insert bolt; 34. Rotation rod; 35. First Toothed transmission belt; 36. Hand wheel; 4. Pressure impact mechanism; 41. Second drive threaded rod; 42. Bias assembly; 421. Pressure impact frame; 422. First positioning bolt; 423. Second positioning bolt; 424. Third positioning bolt; 425. Fourth positioning bolt; 426. Fifth positioning bolt; 43. Pressure block; 44. Impact plate; 45. Cross plate; 46. Tripod; 47. Second toothed transmission belt; 48. Servo motor. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0042] Reference Figure 1 - Figure 11, provides a vehicle rear lower protection device strength testing platform, including a support frame 1, a control console 2 arranged on one side of the support frame 1, and a clamping and pressure-bearing mechanism 3 and a pressure-applying impact mechanism 4 located inside the support frame 1, the pressure-applying impact mechanism 4 includes a horizontal plate 45 fixedly connected to the support frame 1, and two symmetrically arranged tripods 46 are fixedly connected to the top of the horizontal plate 45. The clamping and pressure-bearing mechanism 3 includes an adjusting 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 adjusting component 33. The clamping component 31 is used to adjust the pressure angle of the anti-drill rod sample 32, and the adjusting component 33 is used to adjust the pressure mode of the anti-drill rod sample 32.

[0043] Reference Figure 3 - Figure 5 The adjusting assembly 33 includes a connecting wheel 332 rotatably connected to the inner wall of the tripod 46, the inner wall of the connecting wheel 332 is provided with a rotating groove 333, the inner wall of the rotating groove 333 is rotatably connected to the rotating rod 34, the end of the connecting wheel 332 away from the rotating rod 34 is fixedly connected to the first driving threaded rod 331, the rotating rod 34 and the first driving threaded rod 331 are rotatably connected to the two ends of the support frame 1 respectively, the inner wall of the connecting wheel 332 is provided with a clamping groove 334, the inner wall of the rotating rod 34 is provided with a clamping hole, 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.

[0044] The tripod 46 significantly enhances resistance to lateral torsion. During offset impact testing, the impact force generates torque, and the tripod 46 prevents deformation of the support structure through geometric stability, ensuring accurate test data.

[0045] Specifically, when the plug-in bolt 335 is not installed, the rotating rod 34 rotates in the rotating groove 333 in 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. Static simulation and horizontal impact tests can be performed. After the plug-in bolt 335 is installed, the rotating rod 34 is connected to the first driving threaded rod 331 as a whole. When the rotating rod 34 rotates, it drives the first driving threaded rod 331 to rotate together, so that impact detection of the anti-drill rod sample 32 in a moving state can be performed.

[0046] By setting the adjustment component 33, the clamping component 31 can be used to adjust the pressure bearing angle of the anti-drill rod sample 32 to simulate different actual working conditions. When the pressure bearing mode needs to be changed, the rotating rod 34 is rotated. Since the connecting wheel 332 is rotatably connected to the rotating rod 34 through the rotating groove 333, and a plug 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 thereto will also rotate, thereby realizing the adjustment of the pressure bearing mode of the anti-drill rod sample 32. The horizontal plate 45 and the tripod 46 in the pressure impact mechanism 4 provide a stable support structure for the entire adjustment process. Through the above-mentioned adjustment of the angle and pressure bearing mode of the anti-drill rod sample 32, the pressure impact mechanism 4 applies corresponding pressure and impact to detect the strength of the rear lower protective device of the vehicle to ensure that it meets the safety standards. By installing the plug bolt 335 or not, the rotation rod 34 and the first driving threaded rod 331 can be separated (static test) or linked (dynamic rear-end collision simulation), which greatly simplifies the complexity of mode switching.

[0047] Reference Figure 3 - Figure 5 The clamping assembly 31 includes a clamping platform 311 threadedly connected between two first driving threaded rods 331. The top of the clamping platform 311 is fixedly connected to two symmetrically arranged groups of positioning assemblies. The two groups of positioning assemblies include a first positioning rod 313, a second positioning rod 314 and a third positioning rod 315. 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-drill rod sample 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. The two ends of the anti-drill rod sample 32 are respectively fixed on the two groups of positioning assemblies.

[0048] Specifically, the two first drive threaded rods 331 are threadedly connected to the clamping platform 311. When the first drive threaded rod 331 rotates, it will drive the clamping platform 311 to move. The adjusting nut 312 can change its position on the positioning assembly and thus adjust the height of the anti-drill rod sample 32. The first positioning rod 313 and the second positioning rod 314 on one side are both set on an arc with the third positioning rod 315 on the other side as the center. One end of the anti-drill rod sample 32 is fixed to one of the third positioning rods 315, and the other end can be fixed to 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. This design allows the anti-drill rod sample 32 to present different inclination angles to simulate the situation of oblique angle rear-end collision during actual use. Of course, more positioning rods can be set in the positioning assembly as needed. If a new test angle is required, it is only necessary to add a positioning rod on the arc without changing the overall structure.

[0049] By fixing one end of the anti-drilling rod sample 32 on the third positioning rod 315 and selecting a different position of the positioning assembly on the other side (the first positioning rod 313 or the second positioning rod 314) at the other end, a preset tilt angle (such as Figure 5 As shown). The arc layout ensures the geometric consistency of angle changes, avoids nonlinear angle deviations caused by linear arrangement, and makes the test conditions more consistent with the tilt state of the actual vehicle during installation. In addition, the first positioning rod 313 and the second positioning rod 314 on one side are both set on an arc with the third positioning rod 315 on the other side as the center. Such an arc arrangement makes the length of the anti-drill rod sample 32 constant. The angle can be changed by simply switching the fixed point, without the need for additional adjustment of the length of the anti-drill rod sample 32 or recalibration. This design significantly improves test efficiency and is especially suitable for repetitive experiments that require frequent angle switching. In addition, the arc layout here simulates the force scenario of the real vehicle protective device. When the anti-drill rod sample 32 is tilted, the impact load will be decomposed along the axial and radial directions of the anti-drill rod sample 32. The arc positioning ensures that the direction of the decomposed force is consistent with that when the actual vehicle is hit (such as oblique force in a rear-end collision). Compared with linear arrangement, the arc can more realistically reflect the torque distribution under tilt. 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 the positioning assembly on one side is not only used for angle adjustment, but also has an implicit error-proofing function: since the third positioning rod 315 in the positioning assembly on one side has a constant distance from the first positioning rod 313, the second positioning rod 314, and the third positioning rod 315 in the opposite positioning assembly, the operator does not need to measure the length when installing the anti-drilling rod sample 32. He only needs to select the first positioning rod 313, the second positioning rod 314 or the third positioning rod 315 of the corresponding angle to automatically align, thereby avoiding human installation errors.

[0050] By means of the provided clamping assembly 31, the anti-drill rod sample 32 is installed between the two third positioning rods 315, and the test can be carried out in a parallel state, and its height can be adjusted by adjusting the nut 312. In addition, when one end of the anti-drill rod sample 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 sample 32 can be tilted at a certain angle; when one end of the anti-drill rod sample 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 sample 32 can be tilted at a larger angle. Through such a setting, the strength changes of the anti-drill rod sample 32 at different inclination angles can be accurately detected.

[0051] Reference Figure 6 - Figure 9The pressure impact mechanism 4 also includes two second driving 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 driving threaded rods 41. The biasing assembly 42 includes a pressure impact frame 421 threadedly connected between the outer walls of the two second driving threaded rods 41. 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 one fifth positioning bolt 426 from both sides to the middle, and 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 bolts 426; an impact plate 44 is threadedly connected on 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 bolts 426.

[0052] Specifically, three-point loading is used in mechanical analysis, where three supporting or force-bearing points bear external loads to test strength and stability. By selecting the installation positions of the third, fourth, and fifth locating bolts 424, 425, and 426, the pressure block 43 can accommodate various testing conditions, including head-on impact, offset angles, and multiple offset angles, without requiring additional hardware adjustments. Adding a sixth locating bolt allows for expanded testing at even more offset angles.

[0053] By setting up the pressure impact mechanism 4, the two second drive threaded rods 41 can be driven to rotate. Since the pressure impact frame 421 of the biasing assembly 42 is threadedly connected between the outer walls of the two second drive threaded rods 41, the rotation of the second drive threaded rod 41 will drive the pressure impact frame 421 to move along its axial direction. If a pressure test is to be performed on the anti-drill rod sample 32, a set of pressure blocks 43 can be 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 bolts 426, and the pressure blocks 43 are used to apply pressure to the anti-drill rod sample 32. If an impact test is to be performed, the impact plate 44 can be threadedly connected 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 bolts 426, and the anti-drill rod sample 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.

[0054] 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. It 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, ensuring the consistency and repeatability of each test. In addition, the process of converting the rotational motion of the servo motor 48 into linear motion by the second drive threaded rod 41 is relatively smooth, and the vibration and noise are relatively small during the whole 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.

[0055] Reference Figure 10 A first toothed transmission belt 35 is connected between the two first drive threaded rods 331, and the first toothed transmission belt 35 is arranged on the outside of the support frame 1, wherein one end of the first drive threaded rod 331 close to the first toothed transmission belt 35 is fixedly connected to a handwheel 36.

[0056] The position of the anti-drill rod sample 32 can be adjusted by a hand wheel 36 via a first toothed transmission belt 35 and a first drive threaded rod 331 .

[0057] 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.

[0058] A servo motor 48, via a second toothed belt 47, drives the two second drive threaded rods 41 and the two rotating rods 34 in rotation, reducing synchronization errors and energy consumption compared to multi-motor systems. The first and second toothed belts 35, 47 are located outside the support frame 1, facilitating quick maintenance and tension adjustment. This also prevents interference with transmission caused by flying metal debris during testing, such as those generated by impact testing.

[0059] When the cam 314 is in the working state, the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 314 is in the working state, and the cam 4 is threadedly connected 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. The servo motor 48 is operated in the reverse direction to make the pressure 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 rod sample 32. When performing the impact test on the anti-drill rod sample 32 in the moving state, the plug-in bolt 335 is installed 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 operated to drive the impact plate 44 to perform the impact, a real rear-end collision scenario can be simulated. In addition, by installing the anti-drill rod sample 32 at different positions of the positioning assemblies on both sides, the strength change of the anti-drill rod sample 32 at different inclination angles can be accurately tested.

[0060] Working principle of the present invention:

[0061] During operation, the anti-drilling rod sample 32 is mounted on the clamping platform 311 by means of the adjusting nut 312 , and both ends of the anti-drilling rod sample 32 are mounted at different positions of the positioning assembly, which can simulate different working conditions.

[0062] When performing static simulation, the anti-drill rod sample 32 is installed between the two third positioning rods 315, and its height is adjusted by adjusting the nut 312. At this time, the plug-in 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 rod sample 32 is adjusted by the handwheel 36 through the first toothed transmission belt 35 and the first driving threaded rod 331. Then, a set of pressure 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.

[0063] Turn on the servo motor 48, and the output shaft of the servo motor 48 drives the two second drive threaded rods 41 and the two rotating rods 34 to rotate together through the second toothed transmission belt 47. The second drive threaded rod 41 performs three-point loading on the anti-drill rod sample 32 through the pressure impact frame 421 and the pressure block 43 to complete the static simulation and obtain the test data.

[0064] When performing a horizontal impact test, first remove the pressure block 43, then thread the impact plate 44 onto 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, and run the servo motor 48 in reverse to make the pressure 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 sample 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 angle offset 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 angle offset is performed.

[0065] During impact testing of the anti-drill rod specimen 32 while in motion, a plug-in bolt 335 is installed in the coupling slot 334, integrally connecting the rotating rod 34 to the first drive threaded rod 331. Furthermore, the pitch ratio between the first drive threaded rod 331 and the second drive threaded rod 41 is adjusted to achieve different movement speeds for the anti-drill rod specimen 32 and the impact plate 44. This allows the anti-drill rod specimen 32 to move in the same direction at a specific speed ratio when the servo motor 48 drives the impact plate 44, simulating the relative speeds of a real rear-end collision. By precalculating and adjusting this pitch ratio, the anti-drill rod specimen 32 is able to meet the collision speed requirements specified by various regulations, such as the collision energy equivalent velocity specified in the EU ECER 29-03 standard.

[0066] In addition, when one end of the anti-drill rod sample 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 sample 32 can be tilted at a certain angle; when one end of the anti-drill rod sample 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 sample 32 can be tilted at a larger angle. Through such a setting, the strength changes of the anti-drill rod sample 32 at different tilt angles can be accurately detected.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in 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) includes 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) includes an adjusting 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 adjusting component (33), the clamping component (31) is used to adjust the pressure angle of the anti-drill rod sample (32), and the adjusting component (33) is used to adjust the pressure mode of the anti-drill rod sample (32); The adjustment assembly (33) includes 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 the 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; a plug-in bolt (335) is installed between the clamping groove (334) and the inner wall of the clamping hole; 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); A second toothed transmission belt (47) is connected between the two second drive 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). The servo motor (48) is fixedly mounted on the outer wall of the console (2).

2. The vehicle rear lower protection device strength testing platform according to claim 1, characterized in that: The clamping assembly (31) includes a clamping platform (311) threadedly connected between two first driving threaded rods (331), and two groups of positioning assemblies symmetrically arranged are fixedly connected to the top of the clamping platform (311), and the two groups of positioning assemblies each include a first positioning rod (313), a second positioning rod (314) and a third positioning rod (315). The outer walls of the two groups of positioning assemblies are threadedly connected with an adjusting nut (312), and the adjusting nut (312) is used to adjust the height of the anti-drill 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 both 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 1, characterized in that: The biasing assembly (42) includes 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 to 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.

5. The vehicle rear lower protection device strength testing platform according to claim 4, 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).

6. The vehicle rear lower protection device strength testing platform according to claim 4, characterized in that: An impact plate (44) is threadedly connected 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).

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

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