Device for detecting the elastic properties of a ski

Abstract

The application discloses a kind of alpine ski elastic property detection devices, including test platform and the horizontal collinear torque exerting mechanism, fixed fulcrum, load driving mechanism and horizontal fulcrum sequentially assembled on test platform;Wherein, the working position of torque exerting mechanism corresponds with the lower clamping position of fixed fulcrum and is located at the same height, and the two constitute torsion spring constant determination unit;The lower clamping position of fixed fulcrum corresponds with the working position of load driving mechanism and is located at the same height, and the two constitute end spring constant determination unit;The upper clamping position of fixed fulcrum, the working position of load driving mechanism and the fulcrum position of horizontal fulcrum correspond and are located at the same height, and the three constitute center spring constant determination unit.The application can satisfy the index requirement when alpine ski is measured in elastic property in international standard ISO 5902-2013 "elastic property determination", fills the blank in domestic ski detection field.

Description

Technical Field

[0001] This invention belongs to the field of ski performance testing technology, specifically relating to a device for testing the elastic properties of alpine skis. Background Technology

[0002] The deformation and fracture load properties, elastic characteristics, and polar rotational inertia of alpine skis are important indicators for evaluating product quality. Research has shown that skis are constantly subjected to bending, flexing, and deformation loads during alpine skiing. If any of these properties fails to meet standards, the skis are highly susceptible to plastic deformation or breakage during alpine skiing, potentially causing injury or even accidents.

[0003] Currently, my country has not issued relevant standards for ski products. Therefore, the elastic properties of skis are generally tested according to the international standard ISO 5902-2013, "Determination of elastic properties". The specific testing method is to simulate the ski being subjected to different loads and measure the deformation of the ski to determine whether the ski meets the standard requirements.

[0004] However, according to a survey by the National Sports Goods Quality Supervision and Inspection Center, a leading national testing institution in the sports industry, there is currently no domestically produced or developed testing equipment capable of completing the corresponding testing processes under the aforementioned standards. For the determination of the elastic properties of skis, most domestic testing institutions use inefficient and highly biased manual testing methods, while a few choose to purchase costly foreign testing equipment. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention aims to provide a device for testing the elastic properties of alpine skis, thereby improving the efficiency of ski testing and filling a gap in the domestic ski testing field.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a test platform and a horizontally collinear torque application mechanism, a fixed fulcrum, a load driving mechanism and a horizontal fulcrum are sequentially assembled on the test platform;

[0007] Among them, the working position of the torque application mechanism corresponds to the lower clamping position of the fixed fulcrum and is located at the same height, and the two together form the torsion spring constant measuring unit; the lower clamping position of the fixed fulcrum corresponds to the working position of the load driving mechanism and is located at the same height, and the two together form the end spring constant measuring unit; the upper clamping position of the fixed fulcrum, the working position of the load driving mechanism, and the fulcrum position of the horizontal fulcrum correspond to each other and are located at the same height, and the three together form the center spring constant measuring unit.

[0008] As a limitation of the present invention, both the fixed fulcrum and the horizontal fulcrum are assembled on the test platform via a slide rail assembly;

[0009] Furthermore, the test platform is equipped with a first scale for measuring the horizontal distance between the fixed fulcrum and the torque application mechanism, a second scale for measuring the horizontal distance between the fixed fulcrum and the center of the load driving mechanism, and a third scale for measuring the horizontal distance between the horizontal fulcrum and the center of the load driving mechanism.

[0010] As a further limitation of the present invention, the horizontal fulcrum includes a fulcrum support and a first low-friction roller; the bottom end of the fulcrum support is assembled on the test platform through a slide assembly, and the first low-friction roller is rotatably connected to the fulcrum support to form a fulcrum position to support the end of the sample.

[0011] As a further limitation of the present invention, the fixed fulcrum includes an upper clamping assembly and a lower clamping assembly that are assembled together.

[0012] The upper clamping assembly includes a first clamping cylinder, a first optical axis, and a second low-friction roller mounted on the test platform via a support plate. The first optical axis is rotatably connected to the power output end of the first clamping cylinder, and the second low-friction roller is rotatably connected to the support plate. The first optical axis and the second low-friction roller are vertically aligned to form an upper clamping position to clamp and fix the sample end.

[0013] The support plate is assembled on the test platform via a slide rail assembly.

[0014] As a further limitation of the present invention, the lower clamping assembly includes a plurality of second clamping cylinders and a lower pressing plate fixedly disposed below the upper clamping assembly by a support plate; each second clamping cylinder has an additional block fixedly mounted on its power output end, and the plurality of additional blocks correspond vertically to the lower pressing plate to form a planar jaw type lower clamping position to clamp and fix the middle part of the sample.

[0015] As another limitation of the present invention, the torque application mechanism includes multiple bearing supports fixedly mounted on the test platform, a hollow cylinder rotatably connected to the bearing supports, and an upper clamp and a lower clamp fixed in the hollow cylinder.

[0016] One end of the hollow cylinder is detachably provided with a blocking plate, and the blocking plate is provided with a mounting block for assembling a torque wrench; the upper clamp is movably connected inside the hollow cylinder, forming a working position for the torque application mechanism with the lower clamp.

[0017] As a further limitation of the invention, an angle gauge is fixed on one of the bearing supports.

[0018] As a further limitation of the invention, the hollow cylinder has an opening on the upper side wall for the sample end to extend out.

[0019] As a third limitation of the present invention, the load driving mechanism includes a ball screw fixed on the test platform by a gantry bracket, a stepper motor that is connected to the ball screw for transmission, a loading beam mounted on the ball screw, and a force application fulcrum fixed on the loading beam.

[0020] The force application fulcrum includes a connecting plate and a second optical axis rotatably connected to the connecting plate. A force sensor is fixed between the connecting plate and the loading beam. The connecting plate and the second optical axis form the working position of the load driving mechanism.

[0021] As a further limitation of the present invention, two parallel guide rails are also fixed on the gantry bracket, and the two ends of the loading beam are slidably connected to the guide rails.

[0022] By adopting the above-described technical solution, the beneficial effects achieved by this invention compared to the prior art are as follows:

[0023] (1) This invention meets the index requirements for measuring the elastic properties of alpine skis in the international standard ISO 5902-2013 "Determination of Elastic Properties". It solves the problems of inconvenience, unscientific nature and low efficiency of manual testing of the elastic properties of alpine skis in China, and also solves the problem of high cost of importing related equipment from abroad, filling the gap in the field of ski testing in China. This invention realizes scientific and rapid testing of alpine skis, thereby promoting effective quality control of manufacturing enterprises, better realizing the efficiency and level of quality supervision of alpine skis, and providing technical support and equipment guarantee for sports testing work in my country.

[0024] (2) This invention has a reasonable layout and high flexibility of use. The torque application mechanism, fixed fulcrum, load drive mechanism, and horizontal fulcrum work together flexibly to determine multiple indicators such as the center spring constant, end spring constant, and torsional spring constant of alpine skis. Specifically, the fixed fulcrum, load drive mechanism, and horizontal fulcrum work together to determine the center spring constant of the sample; the fixed fulcrum and load drive mechanism work together to determine the end spring constant of the sample; and the torque application mechanism and fixed fulcrum work together to determine the torsional spring constant of the sample. (The end spring constant includes the front spring constant, rear spring constant, head spring constant, and tail spring constant.)

[0025] (3) In this invention, both the fixed support point and the horizontal support point are assembled on the test platform via a slide assembly, and their positions are flexible and adjustable, thus adapting to the testing of alpine skis of different lengths. Furthermore, the test platform is equipped with multiple scales for measuring the positions of the fixed support point and the horizontal support point, enabling staff to accurately locate the fixed support point or the horizontal support point, ensuring that the testing conditions meet the requirements of the international standard ISO 5902-2013 "Determination of Elastic Properties".

[0026] (4) The hollow cylinder in the torque application mechanism of the present invention has an opening on the upper side, which allows the sample end to extend out, so that the torsion spring constant measuring unit composed of the torque application mechanism and the fixed fulcrum can also detect alpine skis with large warping at both ends, and has a wider range of applications.

[0027] (5) The load driving mechanism in this invention uses a stepper motor and a ball screw as the force application mechanism of the loading beam, and two parallel guide rails as the guide mechanism of the loading beam. The loading speed is adjustable and the driving stability is good. It can increase the load to the specified value at a constant speed, ensuring the standardized detection action of the equipment. Attached Figure Description

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the torque application mechanism in an embodiment of the present invention;

[0031] Figure 3 This is a longitudinal section diagram of the torque application mechanism in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the fixed fulcrum structure in an embodiment of the present invention;

[0033] Figure 5 This is a side view showing the structural relationship of the load driving mechanism in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the horizontal fulcrum in an embodiment of the present invention;

[0035] In the diagram: 1. Test platform; 2. Torque application mechanism; 3. Fixed fulcrum; 4. Load drive mechanism; 5. Horizontal fulcrum;

[0036] 21. Bearing bracket; 22. Hollow cylinder; 23. Upper clamp; 24. Lower clamp; 25. Sealing plate; 26. Mounting block; 27. Angle gauge;

[0037] 31. First clamping cylinder; 32. First optical axis; 33. Second low-friction roller; 34. Second clamping cylinder; 35. Additional block; 36. Lowering plate; 37. Support plate;

[0038] 41. Gantry support; 42. Stepper motor; 43. Ball screw; 44. Loading beam; 45. Force sensor; 46. Connecting plate; 47. Second optical axis;

[0039] 51. Pivot support; 52. First low-friction roller. Detailed Implementation

[0040] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and understanding purposes only and are not intended to limit the scope of the invention.

[0041] Example 1: A device for testing the elastic properties of alpine skis

[0042] like Figure 1 As shown, this embodiment includes a wooden test platform 1, and a torque application mechanism 2, a fixed fulcrum 3, a load driving mechanism 4, and a horizontal fulcrum 5, which are sequentially assembled on the test platform 1 and are horizontally collinear.

[0043] Among them, the torque application mechanism 2 and the fixed fulcrum 3 can form a torsion spring constant measurement unit. The working position of the torque application mechanism 2 corresponds to the lower clamping position of the fixed fulcrum 3 and is located at the same height. It can complete the measurement of the torsion spring constant of the sample head and the torsion spring constant of the sample tail according to international standard requirements.

[0044] The load drive mechanism 4 and the fixed fulcrum 3 can form an end spring constant measurement unit. The working position of the load drive mechanism 4 corresponds to the lower clamping position of the fixed fulcrum 3 and is located at the same height. It can complete the measurement of the end spring constant of the sample (including four indicators: front spring constant, rear spring constant, head spring constant and tail spring constant) according to international standard requirements.

[0045] The fixed fulcrum 3, the load driving mechanism 4, and the horizontal fulcrum 5 can form a central spring constant measurement unit. The upper clamping position of the fixed fulcrum 3, the working position of the load driving mechanism 4, and the fulcrum position of the horizontal fulcrum 5 correspond to each other and are located at the same height, which can complete the measurement of the central spring constant of the sample according to international standard requirements.

[0046] 1. Torque application mechanism 2

[0047] The torque application mechanism 2 is used to apply a specified force to the end of the sample in conjunction with the fixed fulcrum 3, and to measure the torsional angle of the sample end. Figure 2 and Figure 3As shown, the torque application mechanism 2 includes multiple bearing supports 21 fixedly mounted parallel to the test platform 1, a hollow cylinder 22 rotatably connected to the multiple bearing supports 21, and an upper clamp 23 and a lower clamp 24 fixed in the hollow cylinder 22. The hollow cylinder 22 serves as a rotatable, low-friction torque head in the torque application mechanism 2, with one end open towards the fixed fulcrum 3, while the other end is detachably fitted with a blocking plate 25. A mounting block 26 for assembling a torque wrench is fixed at the center of the blocking plate 25. During testing, the torque wrench is mounted on the blocking plate 25 via the mounting block 26, and torque is applied to the hollow cylinder 22 using the torque wrench. The specific value of the torque applied to the sample end during the testing process can then be observed.

[0048] Furthermore, after the hollow cylinder 22 is assembled onto the bearing bracket 21, an opening is provided on its upper side wall for the sample tip to extend out. In this embodiment, there are two bearing brackets 21, and in order to measure the torsion angle of the sample, an angle gauge 27 is fixed on the outer bearing bracket 21.

[0049] The upper clamp 23 and the lower clamp 24 are vertically aligned, forming a working position for fixing the sample. This working position corresponds to the lower clamping position of the fixing fulcrum 3 and is located at the same height. Specifically... Figure 3 As shown, the lower clamp 24 is fixed to the inner wall of the hollow cylinder 22 and is located at the bottom; the upper clamp 23 is movably connected to the hollow cylinder 22 and is located at the top. The upper clamp 23 includes a fixed plate located inside the hollow cylinder 22 and a hand-tightened Torx screw threaded onto the hollow cylinder 22. The bottom end of the hand-tightened Torx screw is rotatably connected to the fixed plate, and the top end extends upward to the outside of the hollow cylinder 22 and is fixedly fitted with a handle. To ensure accurate positioning of the fixed plate, in this embodiment, multiple optical axes for guiding the fixed plate up and down are also provided between the fixed plate and the hollow cylinder 22.

[0050] II. Fixed fulcrum 3

[0051] The fixed fulcrum 3 is mounted on the test platform 1 via a slide assembly, and its position can be flexibly adjusted. The test platform 1 is also equipped with a first scale for measuring the horizontal distance between the fixed fulcrum 3 and the torque application mechanism 2, and a second scale for measuring the horizontal distance between the fixed fulcrum 3 and the center of the load driving mechanism 4.

[0052] Specifically, the fixed fulcrum 3 is used to clamp the sample, in conjunction with the torque application mechanism 2 or the load drive mechanism 4, to complete the corresponding testing items on the sample. For example... Figure 4As shown, the fixed fulcrum 3 includes an upper clamping assembly and a lower clamping assembly assembled as one unit. From top to bottom, the upper clamping assembly includes a first clamping cylinder 31, a first optical shaft 32, and a second low-friction roller 33, which are mounted on the test platform 1 via a support plate 37. The first optical shaft 32 is rotatably connected to the power output end of the first clamping cylinder 31, and the second low-friction roller 33 is rotatably connected to the support plate 37. The first optical shaft 32 and the second low-friction roller 33 correspond vertically to each other, and together they form an upper clamping position for clamping and fixing the end of the sample. This upper clamping position corresponds to the fulcrum position of the horizontal fulcrum 5 and is located at the same height.

[0053] The lower clamping assembly includes a plurality of second clamping cylinders 34 and a lower pressing plate 36 fixed below the upper clamping assembly via a support plate 37, and an additional block 35 is fixedly mounted on the power output end of each second clamping cylinder 34. The plurality of additional blocks 35 correspond vertically to the lower pressing plate 36, and the two together form a lower clamping position for clamping and fixing the central planar jaw of the sample, and this lower clamping position corresponds to the working position of the torque application mechanism 2 and is located at the same height. In this embodiment, a total of three sets of second clamping cylinders 34 are arranged in parallel.

[0054] It should be noted that the aforementioned support plate 37 is assembled on the test platform 1 via a sliding assembly to achieve the sliding setting of the fixed fulcrum 3 as a whole on the test platform 1.

[0055] III. Load Drive Mechanism 4

[0056] The load drive mechanism 4 is used to gradually apply a specified force to the middle of the sample with the cooperation of the fixed fulcrum 3 and the horizontal fulcrum 5, and to measure the deformation of the sample. Figure 5 As shown, the load drive mechanism 4 includes a ball screw 43 fixed on the test platform 1 via a gantry bracket 41, a stepper motor 42 connected to the ball screw 43 via a coupling and a synchronous belt, a loading beam 44 mounted on the ball screw 43, and a force application fulcrum fixed on the loading beam 44.

[0057] Specifically, the force application fulcrum includes a U-shaped connecting plate 46 and a second optical shaft 47 rotatably connected to the connecting plate 46. A force sensor 45 is fixed between the connecting plate 46 and the loading beam 44. The connecting plate 46 and the second optical shaft 47 together constitute the working position of the load driving mechanism 4, and this working position is on the same horizontal line as the upper clamping position and lower clamping position of the fixed fulcrum 3 and the fulcrum position of the horizontal fulcrum 5.

[0058] When determining the spring constant at the end of the sample, the end of the sample is placed between the connecting plate 46 and the second optical axis 47. The second optical axis 47 is moved upward by the loading beam 44 through the ball screw 43, stepper motor 42 and other driving components to apply an upward force to the end of the sample to make it tilt up.

[0059] When determining the spring constant at the center of the sample, the center of the sample is placed below the second optical axis 47. The second optical axis 47 is moved downward by the loading beam 44 through the ball screw 43, stepper motor 42 and other driving components to apply a downward force to the center of the sample to produce a certain deformation.

[0060] To ensure the smoothness of driving the force application fulcrum, in this embodiment, two parallel guide rails are also fixed on the gantry bracket 41. The two ends of the loading beam 44, which is fixed with the force application fulcrum, are slidably connected to the guide rails so as to guide the loading beam 44 through the guide rails.

[0061] IV. Horizontal fulcrum 5

[0062] The horizontal fulcrum 5 is mounted on the test platform 1 via a slide assembly, and its position can be flexibly adjusted. A third scale for measuring the horizontal distance between the horizontal fulcrum 5 and the center of the load drive mechanism 4 is fixed at the corresponding position of the test platform 1.

[0063] Specifically, the horizontal fulcrum 5 is used in conjunction with the upper clamping assembly of the fixed fulcrum 3 to support the sample, ensuring that the load drive mechanism 4 can complete the determination of the spring constant at the center of the sample. For example... Figure 6 As shown, the horizontal fulcrum 5 includes a fulcrum bracket 51 and a first low-friction roller 52. The bottom end of the fulcrum bracket 51 is mounted on the test platform 1 via a slide assembly. The first low-friction roller 52 is rotatably connected to the fulcrum bracket 51 to form a fulcrum position for supporting the end of the sample. This fulcrum position corresponds to the upper clamping position of the fixed fulcrum 3 and is located at the same height.

[0064] This embodiment, under the automatic control of a PC-based host computer and a PLC control system, enables the detection of the elastic properties of a sample (alpine ski board), as detailed below:

[0065] Project 1: Determining the torsion spring constant of a sample using a torsion spring constant measuring unit composed of a torque application mechanism 2 and a fixed fulcrum 3: First, move and fix the fixed fulcrum 3 to a suitable position, then place the sample in and adjust its position, and clamp the sample using the upper clamp 23 and lower clamp 24 in the torque application mechanism 2 and the lower clamping assembly in the fixed fulcrum 3; then, install a torque wrench on the hollow cylinder 22, apply a specified force to the hollow cylinder 22 using the torque wrench, and record the rotation angle of the hollow cylinder 22 using an angle ruler 27; finally, substitute the force value and rotation angle into the corresponding calculation formula to measure the torsion spring constant of the sample.

[0066] By placing either the head or tail of the sample inside the hollow cylinder 22, the torsion spring constant of the head or tail of the sample can be determined.

[0067] Project 2: The end spring constant of a sample is determined using an end spring constant measuring unit composed of a load drive mechanism 4 and a fixed fulcrum 3. First, the fixed fulcrum 3 is moved to a suitable position and fixed. Then, the sample is placed in and its position adjusted, with one end of the sample positioned above the second optical axis 47 in the load drive mechanism 4, and clamped by the lower clamping assembly in the fixed fulcrum 3. Under the control of the PC and PLC control system, the stepper motor 42, ball screw 43, and other driving components drive the second optical axis 47 upwards via the loading beam 44, gradually applying a specified force to the sample end. The corresponding force value is detected by the force sensor 45 and transmitted to the PC. The deformation of the sample end (equivalent to the upward movement distance of the second optical axis 47) is calculated by counting the number of rotations of the ball screw 43 driven by the stepper motor 42. Finally, the force value and deformation are substituted into the corresponding calculation formula to determine the end spring constant of the sample.

[0068] By placing the front, rear, head, or tail of the sample above the second optical axis 47, the spring constant of the corresponding part of the sample can be determined.

[0069] Project 3: Determining the central spring constant of a sample using a central spring constant measuring unit composed of a load drive mechanism 4, a fixed fulcrum 3, and a horizontal fulcrum 5. First, the fixed fulcrum 3 and horizontal fulcrum 5 are moved to appropriate positions and fixed. Then, the sample is placed on the upper clamping assembly of the fixed fulcrum 3 and the first low-friction roller 52 of the horizontal fulcrum 5, ensuring that the center of the sample is below the second optical axis 47 of the load drive mechanism 4. The sample is then clamped by the upper clamping assembly of the fixed fulcrum 3. Under the control of the PC host computer and PLC control system, the stepper motor 42, ball screw 43, and other driving components drive the second optical axis 47 downwards via the loading beam 44, gradually applying a specified force value to the center of the sample. The corresponding force value is detected by the force sensor 45 and transmitted to the PC host computer. The deformation of the center of the sample (equivalent to the downward movement distance of the second optical axis 47) is calculated by counting the number of rotations of the ball screw 43 driven by the stepper motor 42. Finally, by substituting the force value and deformation into the corresponding calculation formula, the central spring constant of the sample can be measured.

[0070] It should be noted that the above items one through three are independent of each other. When conducting elasticity tests on alpine skis, staff can choose to perform one or more of them as needed.

[0071] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for testing the elastic properties of alpine skis, characterized in that: It includes a test platform and a horizontally collinear torque application mechanism, a fixed support point, a load driving mechanism, and a horizontal support point, which are sequentially assembled on the test platform. Among them, the working position of the torque application mechanism corresponds to the lower clamping position of the fixed fulcrum and is located at the same height, and the two together form the torsion spring constant measurement unit; the lower clamping position of the fixed fulcrum corresponds to the working position of the load driving mechanism and is located at the same height, and the two together form the end spring constant measurement unit; the upper clamping position of the fixed fulcrum, the working position of the load driving mechanism, and the fulcrum position of the horizontal fulcrum correspond to the fulcrum position of the horizontal fulcrum and are located at the same height, and the three together form the center spring constant measurement unit. The torque application mechanism includes multiple bearing supports fixed on the test platform, a hollow cylinder rotatably connected to the bearing supports, and an upper clamp and a lower clamp fixed in the hollow cylinder. One end of the hollow cylinder is detachably provided with a blocking plate, and the blocking plate is provided with a mounting block for assembling a torque wrench; the upper clamp is movably connected inside the hollow cylinder, forming a working position for the torque application mechanism with the lower clamp; The load drive mechanism includes a ball screw fixed on the test platform via a gantry bracket, a stepper motor connected to the ball screw drive, a loading beam mounted on the ball screw, and a force application fulcrum fixed on the loading beam. The force application fulcrum includes a connecting plate and a second optical axis rotatably connected to the connecting plate. A force sensor is fixed between the connecting plate and the loading beam. The connecting plate and the second optical axis form the working position of the load driving mechanism. When determining the spring constant at the end of the sample, place the end of the sample between the connecting plate and the second optical axis, and apply an upward force to the end of the sample to make it tilt upward; When determining the spring constant at the center of the sample, the middle part of the sample is placed below the second optical axis, and a downward force is applied to the middle part of the sample to produce a certain deformation.

2. The alpine ski elasticity property testing device according to claim 1, characterized in that: Both the fixed support point and the horizontal support point are assembled on the test platform via slide rail assemblies; Furthermore, the test platform is equipped with a first scale for measuring the horizontal distance between the fixed fulcrum and the torque application mechanism, a second scale for measuring the horizontal distance between the fixed fulcrum and the center of the load driving mechanism, and a third scale for measuring the horizontal distance between the horizontal fulcrum and the center of the load driving mechanism.

3. The alpine ski elasticity property testing device according to claim 2, characterized in that: The horizontal fulcrum includes a fulcrum support and a first low-friction roller; the bottom end of the fulcrum support is assembled on the test platform via a slide assembly, and the first low-friction roller is rotatably connected to the fulcrum support to form a fulcrum position to support the end of the sample.

4. The alpine ski elasticity property testing device according to claim 2 or 3, characterized in that: The fixed fulcrum includes an upper clamping assembly and a lower clamping assembly that are assembled as one unit. The upper clamping assembly includes a first clamping cylinder, a first optical axis, and a second low-friction roller mounted on the test platform via a support plate. The first optical axis is rotatably connected to the power output end of the first clamping cylinder, and the second low-friction roller is rotatably connected to the support plate. The first optical axis and the second low-friction roller are vertically aligned to form an upper clamping position to clamp and fix the sample end. The support plate is assembled on the test platform via a slide rail assembly.

5. The alpine ski elasticity property testing device according to claim 4, characterized in that: The lower clamping assembly includes multiple second clamping cylinders and a lower pressing plate fixed below the upper clamping assembly via a support plate; each second clamping cylinder has an additional block fixed on its power output end, and the multiple additional blocks correspond vertically with the lower pressing plate to form a planar jaw-type lower clamping position to clamp and fix the middle part of the sample.

6. The alpine ski board elasticity property testing device according to any one of claims 1-3 and 5, characterized in that: An angle gauge is fixed on one of the bearing brackets.

7. The alpine ski elasticity property testing device according to claim 6, characterized in that: The hollow cylinder has an opening on the upper side wall for the sample end to protrude.

8. The alpine ski elasticity property testing device according to claim 7, characterized in that: Two parallel guide rails are also fixed on the gantry support, and the two ends of the loading beam are slidably connected to the guide rails.

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