Rigidity testing device

Abstract

The invention discloses a rigidity test device, and relates to the technical field of test devices. The rigidity testing device comprises a rack mechanism, a loading mechanism, a measuring mechanism and a scanning mechanism, the rack mechanism comprises a mounting table and a fixing frame, the fixing frame is arranged on the mounting table and suitable for mounting a to-be-tested piece, the loading mechanism is suitable for applying a load to the to-be-tested piece, the measuring mechanism comprises at least one range finder, the range finder is arranged on the rack mechanism, and the scanning mechanism is arranged on the rack mechanism. The scanning end of the scanning mechanism faces the rack mechanism. Therefore, through the measuring mechanism and the scanning mechanism, the deformation amount of the to-be-tested piece can be accurately measured and the full view of the to-be-tested piece (such as a vehicle door) can be generated so as to obtain the test result of the rigidity test, the deformation condition of the to-be-tested piece can be recorded in the whole course, and the state of the to-be-tested piece can be observed at the first time. The condition and existing technical problems of the test piece to be tested can be accurately and comprehensively known, the optimization frequency and the total test frequency can be reduced, the research and development time can be shortened, and the research and development cost can be saved.

Description

Technical Field

[0001] The present invention relates to the technical field of testing devices, in particular to a stiffness testing device. Background Art

[0002] In the related art, existing stiffness testing equipment can only measure and record the test results, and it is difficult to record the entire test process. For example, when testing a car door, it is difficult to analyze the deformation of the car door during the test, which makes it difficult for engineering and technical personnel to accurately and comprehensively understand the product status and existing problems, resulting in a large total number of tests and high R&D costs. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a stiffness testing device that can obtain accurate and visual test results and can record the deformation of the test piece throughout the entire process, thereby accurately and comprehensively understanding the condition of the test piece and the technical problems it encounters.

[0004] According to an embodiment of the present invention, a stiffness testing device includes: a bench mechanism, the bench mechanism including: a mounting table and a fixed frame, the fixed frame being arranged on the mounting table and suitable for mounting a test piece; a loading mechanism, the loading mechanism being suitable for applying a load to the test piece; a measuring mechanism, the measuring mechanism including: at least one rangefinder, the rangefinder being arranged on the bench mechanism; and a scanning mechanism, the scanning end of the scanning mechanism being directed toward the bench mechanism.

[0005] According to the stiffness testing device of the embodiment of the present invention, the deformation of the test piece can be accurately measured and the overall image of the test piece (such as a car door) can be generated through the measuring mechanism and the scanning mechanism to obtain the test results of the stiffness test. The deformation of the test piece can be recorded throughout the entire process, and the status of the test piece can be observed at the first time to accurately and comprehensively understand the condition of the test piece and the existing technical problems, which is conducive to reducing the number of optimizations, reducing the total number of tests, shortening the R&D time, and saving R&D costs.

[0006] According to some embodiments of the present invention, the stand mechanism further includes: a pulley group, the pulley group includes at least one pulley, the pulley is arranged on the mounting platform, the loading mechanism includes: a loader and a connecting member, the connecting member is connected to the loader and is suitable for connecting to the test piece, the loader is used to apply a pulling force to the connecting member, and the pulley cooperates with the connecting member to change the force transmission direction of the connecting member.

[0007] According to some embodiments of the present invention, the pulley is movably provided on the mounting platform.

[0008] According to some embodiments of the present invention, the mounting platform has a plurality of slide grooves, the plurality of slide grooves include at least one first slide groove and at least one second slide groove, the first slide groove and the second slide groove are cross-arranged, and the pulley is movably arranged in the slide groove.

[0009] According to some embodiments of the present invention, the stiffness testing device further includes: a self-leveling mechanism, which is suitable for being arranged on the test piece and includes: a lifting lug and a self-leveling measuring piece, the loading mechanism can be assembled in conjunction with the lifting lug, the self-leveling measuring piece has a measuring surface, the self-leveling measuring piece is mounted on the lifting lug and is movable relative to the lifting lug so that the measuring surface is always parallel to the horizontal plane, and at least one of the rangefinders is arranged on the mounting table and faces the measuring surface.

[0010] According to some embodiments of the present invention, the lifting ear has a lifting eye portion and a matching portion, the lifting eye portion is connected to the matching portion, the loading mechanism can be assembled with the lifting eye portion, the self-leveling measuring piece has a sleeve portion, the sleeve portion is sleeved on the matching portion, and the outer surface of the matching portion and the inner surface of the sleeve portion are both spherical and slidingly matched.

[0011] According to some embodiments of the present invention, the platform mechanism further includes: a mounting frame, the mounting frame is installed on the mounting platform, and the mounting platform and the mounting frame are both provided with the rangefinder.

[0012] According to some embodiments of the present invention, the fixing frame has a plurality of mounting portions, and the mounting portions are suitable for cooperating with and assembling the piece to be tested; or, the stand mechanism further includes: a slider, the fixing frame defines a mounting groove, the slider is slidably disposed in the mounting groove, and the slider has a mounting portion, and the mounting portion is suitable for cooperating with and assembling the piece to be tested.

[0013] According to some embodiments of the present invention, the platform mechanism further includes: a plurality of reinforcement frames, each of which is connected between the fixed frame and the mounting platform, and along the height direction of the fixed frame, the ends of the plurality of reinforcement frames connected to the fixed frame are respectively located at different positions of the fixed frame.

[0014] According to some embodiments of the present invention, the stiffness testing device further includes: a host computer, and the loading mechanism, the measuring mechanism, and the scanning mechanism are all communicatively connected to the host computer.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0017] Figure 1 is a schematic diagram of the stiffness testing device according to an embodiment of the present invention cooperating with a test piece;

[0018] Figure 2 is a schematic diagram of a gantry mechanism according to an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the cooperation between the self-leveling mechanism and the test piece according to an embodiment of the present invention.

[0020] Figure 4 is a schematic diagram of a self-leveling mechanism according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] Stand mechanism 1; mounting platform 11; fixing frame 12; mounting groove 121; mounting portion 122; mounting member 123; pulley block 13; pulley 131; mounting frame 14; reinforcement frame 15;

[0023] Loading mechanism 2; loading member 21; connecting member 22;

[0024] Measuring mechanism 3; distance meter 31;

[0025] Scanning mechanism 4; scanning end 41;

[0026] Self-leveling mechanism 5; lifting lug 51; lifting ring portion 511; matching portion 512; self-leveling measuring member 52; measuring surface 521; sleeve portion 522;

[0027] Stiffness testing device 10; test piece 20. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] A stiffness testing device 10 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0030] like Figure 1 and Figure 2As shown, the stiffness testing device 10 according to an embodiment of the present invention includes: a stage mechanism 1, a loading mechanism 2, a measuring mechanism 3 and a scanning mechanism 4. The stage mechanism 1 includes: a mounting table 11 and a fixing frame 12. The fixing frame 12 is arranged on the mounting table 11 and is suitable for mounting the test piece 20. The loading mechanism 2 is suitable for applying a load to the test piece 20. The measuring mechanism 3 includes: at least one rangefinder 31. The rangefinder 31 is arranged on the stage mechanism 1. The scanning end 41 of the scanning mechanism 4 is facing the stage mechanism 1.

[0031] Among them, the stiffness testing device 10 can be used to perform stiffness tests on the test piece 20 to be tested. The test piece 20 to be tested can be a car door. The stiffness tests include droop stiffness tests, over-opening angle tests, torsional stiffness tests, etc. The present invention is explained using the car door droop stiffness test as an example.

[0032] by Figure 1 and Figure 2 Taking the upper and lower directions shown as an example, the mounting platform 11 is located below the fixing frame 12, and the mounting platform 11 and the fixing frame 12 are fixedly connected. As some embodiments of the present invention, the mounting platform 11 and the fixing frame 12 can be welded, snap-connected, or bolted, so that the position of the fixing frame 12 relative to the mounting platform 11 and the support surface remains unchanged. As other embodiments of the present invention, the mounting platform 11 and the fixing frame 12 can be integrally formed. As some embodiments of the present invention, the stand mechanism 1 can be constructed as a steel structure, and the stiffness of the stand mechanism 1 is not less than 25,000 N / mm, so that the stand mechanism 1 exists in the form of a rigid body in stiffness tests.

[0033] The lower side of the mounting platform 11 can be constructed as a plane to facilitate placing the mounting platform 11 on a support surface. The support surface can be the ground, a test bench plane, etc. The mounting platform 11 can be fitted with the support surface so that the mounting platform 11 is stably placed on the support surface. Furthermore, the mounting platform 11 can be placed on a horizontal support surface to reduce the test error caused by the deflection and shaking of the mounting platform 11. The fixing frame 12 can extend in the up and down directions. As some embodiments of the present invention, the extension direction of the fixing frame 12 can be the same as the normal direction of the mounting platform 11. The fixing frame 12 can be used to install a vehicle door. The fixing frame 12 can be hinged to the vehicle door. The vehicle door can be stably fixed to the fixing frame 12 when it is not under load to keep the position stable and unchanged to reduce errors.

[0034] When conducting a droop stiffness test on a vehicle door, the door is first secured to a mounting bracket 12. The door's spatial position and orientation when secured to the mounting bracket 12 are consistent with those when installed on the vehicle, minimizing the door's actual operating state when installed on the vehicle. Position information at the door lock before the door is loaded is measured using a measuring mechanism 3. This mechanism includes at least one rangefinder 31. In some embodiments of the present invention, the measuring mechanism 3 may include a single rangefinder 31. A single rangefinder 31 can measure the door's deformation at multiple stages, including before, during, and after the test. This configuration reduces the number of components. As other embodiments of the present invention, the measuring mechanism 3 may include multiple rangefinders 31, a part of the multiple rangefinders 31 is used to measure the deformation at the door lock, and another part of the multiple rangefinders 31 is used to measure the deformation at the hinge (the connection between the door and the fixing frame 12). It should be noted that the deformation at the hinge (the connection between the door and the fixing frame 12) is an error term that interferes with the test results. By measuring this error term, the deformation measurement results at the door lock can be compensated and corrected to obtain more accurate measurement results, thereby improving the reliability and accuracy of the test results.

[0035] In some embodiments of the present invention, the rangefinder 31 can be configured as a laser rangefinder 31. Using the phase-based distance measurement principle, the laser rangefinder 31 emits a laser beam toward the door lock and measures the phase difference between the emitted and reflected light to derive distance information. This high-precision measurement improves the accuracy and stability of test results and reduces the impact of human factors on the measurement results. During the door droop test, the laser rangefinder 31 can monitor and record the maximum and residual deformation of the door lock in real time, documenting the complete door deformation and rebound process.

[0036] After the vehicle door is secured to the mounting bracket 12, a load can be applied to the door lock via the loading mechanism 2. In some embodiments of the present invention, the loading mechanism 2 may include a motor and a chain. The motor may be connected to the chain. One end of the chain may be connected to the door lock, and the other end of the chain may be in transmission connection with the motor. When the motor is activated, the chain may be pulled to apply the load to the door lock. The loading mechanism 2 may apply the load to the vehicle door in the same direction as gravity, thereby applying a downward pull to the vehicle door, simulating the deformation of the vehicle door due to gravity.

[0037] The scanning end 41 of the scanning mechanism 4 is positioned toward the test stand 1. The scanning area of the scanning mechanism 4 covers the test piece 20 to monitor the position and shape changes of the vehicle door during the test. During the vehicle door droop test, the vehicle door will deform under the action of the load. The scanning mechanism 4 can record the deformation of the vehicle door throughout the entire process and generate a comprehensive image of the vehicle door. The scanning mechanism 4 can not only display the vehicle door deformation, but also visualize the test results by superimposing and animating the vehicle door deformation images at multiple stages before, during, and after the test. This allows engineering R&D personnel to observe the deformation of the vehicle door in real time and intuitively, accurately and comprehensively understand the product status, quickly identify weaknesses in the product structure, and discover and troubleshoot problems. This helps improve test efficiency, reduce the number of product optimizations, reduce the total number of tests, shorten R&D time, and save R&D costs. Furthermore, by recording and visualizing the deformation of the vehicle door throughout the entire process, the repeatability of the test can be improved. As some embodiments of the present invention, the scanning mechanism 4 can be constructed as a binocular blue light scanner. The binocular blue light scanner has the advantages of high-precision measurement, efficient scanning, and efficient processing, and can improve the accuracy of the test results.

[0038] In the above embodiment, the deformation of the test piece 20 can be accurately measured and the full image of the test piece 20 (such as a car door) can be generated through the measuring mechanism 3 and the scanning mechanism 4 to obtain the test results of the stiffness test, and the deformation of the test piece 20 can be recorded throughout the entire process. The state of the test piece 20 can be observed at the first time to accurately and comprehensively understand the condition of the test piece 20 and the existing technical problems, which is conducive to reducing the number of optimization times, reducing the total number of tests, shortening the R&D time, and saving R&D costs.

[0039] In some embodiments of the present invention, Figure 1 As shown, the stand mechanism 1 also includes: a pulley group 13, the pulley group 13 includes at least one pulley 131, the pulley 131 is arranged on the mounting platform 11, and the loading mechanism 2 includes: a loading member 21 and a connecting member 22, the connecting member 22 is connected to the loading member 21 and is suitable for connecting to the test piece 20, the loading member 21 is used to apply tension to the connecting member 22, and the pulley 131 cooperates with the connecting member 22 to change the force transmission direction of the connecting member 22.

[0040] Among them, the connecting member 22 can be connected to the loading member 21 and can be connected to the test piece 20. The loading member 21 can be constructed as a motor, an electric piston cylinder, an air cylinder, etc., and the connecting member 22 can be constructed as a chain, a nylon rope, etc. The following description is based on the case where the loading member 21 is constructed as an electric piston cylinder, the connecting member 22 is constructed as a chain, and the test piece 20 is a car door. The chain has two opposite ends. One end of the chain can be connected to the door lock of the car door, and the other end of the chain is connected to the electric piston cylinder. When the electric piston cylinder is activated, a pulling force can be applied to the chain to achieve the effect of loading the load at the door lock of the car door. The direction of the load loaded by the loading mechanism 2 can be the same as the direction of gravity, that is, the load direction can be perpendicular to the horizontal direction, so that the car door is subjected to a downward pulling force to simulate the process of the car door being deformed by gravity.

[0041] As some embodiments of the present invention, the electric piston cylinder can record the stroke and real-time load of the piston cylinder, and can evenly apply or release during loading and unloading to improve the operability of the test process.

[0042] The pulley block 13 may include at least one pulley 131, that is, the pulley block 13 may include one pulley 131, or the pulley block 13 may include a plurality of pulleys 131. The pulley 131 may be provided on the mounting platform 11, and the pulley 131 may cooperate with the connector 22 to change the force transmission direction of the connector 22. For example, the force direction of the end of the connector 22 connected to the loader 21 may be horizontal. By providing the pulley 131 to change the force transmission direction of the connector 22, the force direction of the end of the connector 22 connected to the door lock of the vehicle door may be vertically downward (that is, the force direction of the end of the connector 22 connected to the door lock of the vehicle door may be perpendicular to the force direction of the end of the connector 22 connected to the loader 21).

[0043] It should be noted that, for the door droop stiffness test, a vertical force needs to be applied to the door, and for the door over-opening angle test, a horizontal force needs to be applied to the door. By setting the pulley group 13, the force transmission direction of the connecting member 22 can be changed, and then a variety of stiffness tests can be completed through the pulley group 13 and the loading mechanism 2 to improve the versatility of the stiffness testing device 10, and the effect of less-component design can be achieved, saving costs.

[0044] In some embodiments of the present invention, Figure 1 As shown, the pulley 131 is movably disposed on the mounting platform 11 .

[0045] In the door droop stiffness test, a vertical downward force needs to be applied to the door. As the door continues to be subjected to force, its shape may change, causing the force direction of the end of the connector 22 connected to the door lock to be non-parallel to the vertical direction. By movably mounting the pulley 131 on the mounting platform 11, the position of the pulley 131 on the mounting platform 11 can be adjusted to adjust the force direction of the end of the connector 22 connected to the door lock, thereby ensuring that the force direction of the end of the connector 22 connected to the door lock is always vertically downward, thereby simulating the deformation of the door due to gravity. This arrangement can improve the reliability of the stiffness testing device 10, improve the accuracy of the test, and improve the accuracy of the test results.

[0046] In some embodiments of the present invention, the mounting platform 11 has a plurality of slide grooves, including at least one first slide groove and at least one second slide groove, the first slide groove and the second slide groove are cross-arranged, and the pulley 131 is movably arranged in the slide groove.

[0047] Among them, the multiple chutes may include a first chute and a second chute, or the multiple chutes may include multiple first chute and multiple second chute, the first chute may be arranged crosswise with the second chute, the crossed first chute is connected to the second chute, and the multiple first chute and multiple second chute may be arranged in a grid.

[0048] The pulley 131 can be connected to the chute. In some embodiments of the present invention, the pulley 131 can have a sliding block, at least part of which can extend into the chute. The sliding block can slide in the chute to change the spatial position of the pulley 131, thereby achieving the effect of changing the force transmission direction of the connecting member 22.

[0049] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the stiffness testing device 10 also includes: a self-leveling mechanism 5, which is suitable for being arranged on the test piece 20 and includes: a lifting ear 51 and a self-leveling measuring piece 52, the loading mechanism 2 can be assembled with the lifting ear 51, the self-leveling measuring piece 52 has a measuring surface 521, the self-leveling measuring piece 52 is mounted on the lifting ear 51 and is movable relative to the lifting ear 51 so that the measuring surface 521 is always parallel to the horizontal plane, and at least one rangefinder 31 is arranged on the mounting table 11 and is opposite to the measuring surface 521.

[0050] The self-leveling mechanism 5 can be fixed to the test object 20 and can be screwed, clamped, or otherwise connected to the test object 20. In a vehicle door sag stiffness test, the self-leveling mechanism 5 can be fixed to the door lock of the vehicle door. The connecting member 22 of the loading mechanism 2 can be assembled with the lifting lug 51. The loading mechanism 2 applies tension to the lifting lug 51, thereby applying tension to the vehicle door.

[0051] The self-leveling measuring member 52 has a measuring surface 521, which is located on the lower side of the self-leveling measuring member 52. The self-leveling measuring member 52 is mounted on the lifting lug 51 and is movable relative to the lifting lug 51. Under the action of gravity, the measuring surface 521 is always parallel to the horizontal plane. At least one rangefinder 31 is provided on the mounting platform 11, and at least one rangefinder 31 is provided opposite the measuring surface 521. In other words, only one rangefinder 31 can be provided on the mounting platform 11 and opposite the measuring surface 521. Alternatively, multiple rangefinders 31 can be provided on the mounting platform 11. Multiple rangefinders 31 can simultaneously measure the position information of the measuring surface 521 to obtain multiple measurement results. By comparing and analyzing multiple measurement results, the accuracy of the test results can be improved. In some embodiments of the present application, at least one rangefinder 31 is located directly below the measuring surface 521.

[0052] It is understandable that as the vehicle door continues to be subjected to force, the shape of the vehicle door may change. By providing a self-leveling mechanism 5 and making the self-leveling mechanism 5 have a measuring surface 521 that is always parallel to the horizontal plane, the measuring surface 521 will not be affected by changes in the shape of the vehicle door, thereby improving the accuracy of the test and the accuracy of the test results.

[0053] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the lifting ear 51 has a lifting ring portion 511 and a matching portion 512, the lifting ring portion 511 is connected to the matching portion 512, the loading mechanism 2 can be assembled with the lifting ring portion 511, and the self-leveling measuring piece 52 has a sleeve portion 522, which is sleeved on the matching portion 512, and the outer surface of the matching portion 512 and the inner surface of the sleeve portion 522 are both spherical and slidingly matched.

[0054] The eyelet portion 511 can be connected to the mating portion 512. In some embodiments of the present invention, the eyelet portion 511 can be integrally formed with the mating portion 512. In other embodiments of the present invention, the eyelet portion 511 can be screwed or clamped to the mating portion 512. In some embodiments of the present invention, the eyelet portion 511 can be configured as a ring, and the connector 22 can be configured as a chain, a nylon rope, etc. The connector 22 can be assembled with the eyelet portion 511. For example, the connector 22 can be tied to the eyelet portion 511.

[0055] The self-leveling measuring piece 52 has a sleeve portion 522, which can be constructed as a ring. The axial direction of the sleeve portion 522 can be horizontal. The sleeve portion 522 can be sleeved on the matching portion 512. The outer surface of the matching portion 512 and the inner surface of the sleeve portion 522 can both be spherical and slide-fit. Under the action of gravity, when the lifting ear 51 moves down due to the tension, Figure 4When moving downward in direction A as shown, the sleeve portion 522 can rotate relative to the matching portion 512 along direction B so that the measuring surface 521 of the self-leveling measuring member 52 is always parallel to the horizontal plane, thereby reducing the measurement error caused by the deflection of the measuring surface 521, thereby improving the accuracy of the test results.

[0056] In some embodiments of the present invention, Figure 2 As shown, the platform mechanism 1 further includes: a mounting frame 14 , which is arranged on the mounting platform 11 , and both the mounting platform 11 and the mounting frame 14 are provided with a rangefinder 31 .

[0057] The mounting bracket 14 can extend in the vertical direction and is disposed above the mounting platform 11. The mounting platform 11 and the mounting bracket 14 are fixedly connected. In some embodiments of the present invention, the mounting platform 11 and the mounting bracket 14 can be welded, clamped, or screwed together. In some embodiments of the present invention, the mounting platform 11 and the mounting bracket 14 can be integrally formed.

[0058] Both the mounting platform 11 and the mounting frame 14 may be provided with a rangefinder 31. As some embodiments of the present invention, in a vehicle door droop test, the vehicle door is connected to the fixing frame 12 via two hinges. The mounting platform 11 may be provided with a rangefinder 31 for measuring the spatial position change of the measuring surface 521. The mounting frame 14 may be provided with two rangefinders 31. The two rangefinders 31 are respectively used to measure the spatial position change at the two hinges. The measurement results may be corrected according to the degree of influence of the spatial position change at the two hinges on the measurement results to reduce errors and improve the accuracy of the test results.

[0059] In some embodiments of the present invention, Figure 2 As shown, the fixing frame 12 has a plurality of mounting portions 122, and the mounting portions 122 are suitable for being assembled with the test piece 20; or, the stand mechanism 1 further includes: a slider, the fixing frame 12 defines a mounting groove 121, and the slider is slidably arranged in the mounting groove 121, and the slider has a mounting portion 122, and the mounting portion 122 is suitable for being assembled with the test piece 20.

[0060] In some examples of the present invention, the fixing frame 12 has multiple mounting portions 122, the mounting portions 122 can be constructed as threaded holes, and the hinges can be installed in the threaded holes by bolts. As some embodiments of the present invention, the fixing frame 12 is defined with a mounting groove 121, and the bottom wall of the mounting groove 121 has multiple mounting portions 122. The hinge of the test piece 20 can be fixedly connected to the mounting portion 122, thereby achieving the effect of fixing the test piece 20 to the mounting portion 122.

[0061] As other embodiments of the present invention, the mounting portion 122 may be configured as a slot, and the test piece 20 may have a snap-fit protrusion that can be stably snap-fitted into the slot, thereby achieving the effect of fixing the test piece 20 to the mounting portion 122 .

[0062] In some examples of the present invention, the stand mechanism 1 may include a slider, and the fixing frame 12 may define a mounting slot 121. The slider is slidably disposed in the mounting slot 121. In some embodiments of the present invention, the stand mechanism 1 may include multiple sliders, each of which can slide within the mounting slot 121. By adjusting the distance between the multiple sliders, the stand mechanism 1 can adapt to test pieces 20 of different sizes. The slider has a mounting portion 122, which can be assembled with the test piece 20. In some embodiments of the present invention, the mounting portion 122 can be configured as a first threaded hole, and the test piece 20 can have a second threaded hole. Bolts can be inserted through the first threaded hole and the second threaded hole to secure the test piece 20 to the fixing frame 12.

[0063] As some embodiments of the present invention, Figure 2 As shown, the fixing frame 12 may have a mounting member 123 , and the mounting member 123 may be used to install a door stopper to restore the actual working state of the door and improve the accuracy of the test results.

[0064] In some embodiments of the present invention, Figure 2 As shown, the platform mechanism 1 also includes: multiple reinforcement frames 15, and the multiple reinforcement frames 15 are all connected between the fixed frame 12 and the mounting platform 11. Along the height direction of the fixed frame 12, the ends of the multiple reinforcement frames 15 connected to the fixed frame 12 are respectively located at different positions of the fixed frame 12.

[0065] The reinforcement frame 15 can be used to strengthen the structural strength of the platform mechanism 1. The number of reinforcement frames 15 can be two, three, or four, and multiple reinforcement frames 15 are connected between the fixed frame 12 and the mounting platform 11. In some embodiments of the present invention, the reinforcement frame 15 can be integrally formed with the fixed frame 12 and the mounting platform 11. In other embodiments of the present invention, the reinforcement frame 15 can be welded, clamped, or screwed to the fixed frame 12, and the reinforcement frame 15 can be welded, clamped, or screwed to the mounting platform 11.

[0066] The reinforcement frame 15 can provide oblique support for the fixing frame 12. Along the vertical direction (the height direction of the fixing frame 12), the ends of the multiple reinforcement frames 15 connected to the fixing frame 12 are respectively located at different positions of the fixing frame 12, so as to strengthen the structural strength of the fixing frame 12 at multiple positions. In some embodiments of the present invention, the ends of the reinforcement frames 15 connected to the fixing frame 12 can be located near the mounting portion 122. In some embodiments of the present invention, such as Figure 2As shown, multiple reinforcement frames 15 can be arranged around the fixed frame 12 to provide oblique support to the fixed frame 12 from multiple directions to strengthen the structural strength of the fixed frame 12, so that the test bench mechanism 1 has a higher structural strength, so that the test bench mechanism 1 can exist in the form of a rigid body in stiffness tests.

[0067] In some embodiments of the present invention, the stiffness testing device 10 further includes a host computer, and the loading mechanism 2 , the measuring mechanism 3 , and the scanning mechanism 4 are all communicatively connected to the host computer.

[0068] The loading mechanism 2, measuring mechanism 3, and scanning mechanism 4 can all be communicatively connected to a host computer. The host computer can control the opening and closing of the loading mechanism 2 and the magnitude of the applied load, and the applied load can be displayed on the host computer. The corresponding measurement and scanning results of the measuring mechanism 3 and scanning mechanism 4 can be transmitted to the host computer, where they can accurately display the test results before, during, and after the test. Furthermore, the host computer can overlay and animate the scanning results of the scanning mechanism 4, allowing engineering R&D personnel to visually observe changes in the test piece 20 in real time, quickly identify weaknesses in the product structure, and detect and troubleshoot problems.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0070] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0071] In the description of the present invention, "plurality" means two or more.

[0072] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0073] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0075] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A stiffness testing device (10), characterized in that: include: A bench mechanism (1), the bench mechanism (1) comprising: a mounting platform (11) and a fixing frame (12), the fixing frame (12) being arranged on the mounting platform (11) and being suitable for mounting a test piece (20); A loading mechanism (2), the loading mechanism (2) being adapted to apply a load to the object to be tested (20); A measuring mechanism (3), the measuring mechanism (3) comprising: at least one distance meter (31), the distance meter (31) being arranged on the platform mechanism (1); A scanning mechanism (4), wherein a scanning end (41) of the scanning mechanism (4) faces the stage mechanism (1).

2. The stiffness testing device (10) according to claim 1, characterized in that: The platform mechanism (1) further comprises: a pulley group (13), wherein the pulley group (13) comprises at least one pulley (131), wherein the pulley (131) is arranged on the mounting platform (11), and the loading mechanism (2) comprises: a loading member (21) and a connecting member (22), wherein the connecting member (22) is connected to the loading member (21) and is suitable for being connected to the test piece (20), wherein the loading member (21) is used to apply a tensile force to the connecting member (22), and the pulley (131) cooperates with the connecting member (22) to change the force transmission direction of the connecting member (22).

3. The stiffness testing device (10) according to claim 2, characterized in that: The pulley (131) is movably arranged on the mounting platform (11).

4. The stiffness testing device (10) according to claim 3, characterized in that: The mounting platform (11) has a plurality of slide grooves, the plurality of slide grooves including at least one first slide groove and at least one second slide groove, the first slide groove and the second slide groove are arranged crosswise, and the pulley (131) is movably arranged in the slide groove.

5. The stiffness testing device (10) according to claim 1, characterized in that: Also includes: A self-leveling mechanism (5) is suitable for being arranged on the test piece (20) and comprises: a lifting lug (51) and a self-leveling measuring piece (52); the loading mechanism (2) can be assembled with the lifting lug (51); the self-leveling measuring piece (52) has a measuring surface (521); the self-leveling measuring piece (52) is sleeved on the lifting lug (51) and is movable relative to the lifting lug (51) so that the measuring surface (521) is always parallel to the horizontal plane; at least one distance meter (31) is arranged on the mounting platform (11) and faces the measuring surface (521).

6. The stiffness testing device (10) according to claim 5, characterized in that: The lifting ear (51) comprises a lifting ring portion (511) and a matching portion (512), wherein the lifting ring portion (511) is connected to the matching portion (512), and the loading mechanism (2) can be assembled with the lifting ring portion (511). The self-leveling measuring piece (52) comprises a sleeve portion (522), wherein the sleeve portion (522) is sleeved on the matching portion (512), and the outer surface of the matching portion (512) and the inner surface of the sleeve portion (522) are both spherical and are slidably matched.

7. The stiffness testing device (10) according to claim 1, characterized in that: The platform mechanism (1) further comprises: a mounting frame (14), wherein the mounting frame (14) is arranged on the mounting platform (11), and the mounting platform (11) and the mounting frame (14) are both provided with the rangefinder (31).

8. The stiffness testing device (10) according to claim 1, characterized in that: The fixing frame (12) has a plurality of mounting portions (122), and the mounting portions (122) are suitable for being assembled with the test piece (20); Alternatively, the stand mechanism (1) further comprises: a slider, the fixed frame (12) defines a mounting groove (121), the slider is slidably arranged in the mounting groove (121), the slider has a mounting portion (122), and the mounting portion (122) is suitable for being assembled with the test piece (20).

9. The stiffness testing device (10) according to claim 1, characterized in that: The platform mechanism (1) further comprises: a plurality of reinforcing frames (15), wherein the plurality of reinforcing frames (15) are all connected between the fixing frame (12) and the mounting platform (11), and along the height direction of the fixing frame (12), the ends of the plurality of reinforcing frames (15) connected to the fixing frame (12) are respectively located at different positions on the fixing frame (12).

10. The stiffness testing device (10) according to any one of claims 1 to 9, characterized in that: Also includes: A host computer, the loading mechanism (2), the measuring mechanism (3), and the scanning mechanism (4) are all communicatively connected to the host computer.

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