Shoe sole dynamic fatigue test equipment
By designing a dynamic fatigue testing device for shoe soles, which simulates the combined forces in human movement, the problem of existing technologies that only simulate vertical forces is solved, and a more accurate assessment of shoe sole fatigue performance is achieved.
Patent Information
- Application Number
- CN202520249945.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing shoe sole fatigue testing equipment only simulates vertical forces, which cannot comprehensively evaluate the performance of the sole in compound sports, resulting in inaccurate test results.
A dynamic fatigue testing device for shoe soles was designed. By simulating the combined forces in human movement, including vertical and horizontal forces, an impact head and a lifting device are used to simulate the lifting and lowering of the foot during running. Combined with pressure sensors and a data processor, the fatigue performance of the shoe sole is detected and analyzed in real time.
It can accurately simulate the combined forces experienced by the foot during exercise, resulting in more precise test results that closely reflect actual conditions. It is suitable for fatigue performance evaluation of various soles and shoes.
Smart Images
Figure CN223845077U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of footwear detection equipment, and especially relates to a sole dynamic fatigue test equipment. BACKGROUND
[0002] Running is a very popular sport because of its low threshold, low site requirement and significant exercise effect. During running, no matter what running posture the runner adopts, the foot landing experiences a dynamic process from slight varus, valgus to climbing off. During this period, the foot force is mainly the vertical ground reaction force, and is also affected by the left and right and front and back ground reaction forces.
[0003] In order to effectively buffer the ground reaction force and reduce the impact force of the knee joint in the vertical direction during exercise, the design of sports shoes focuses on improving the cushioning performance of the sole. This goal is mainly achieved by two means: one is to improve the physical properties of the midsole material to enhance the cushioning effect, but this largely depends on the breakthrough of raw material technology; the second is to improve the structure of the midsole, which absorbs the ground impact force through a specific deformation mode.
[0004] However, there are some limitations in detecting the cushioning performance of the sole material, the sole or the whole shoe. The material itself has attenuation and fatigue, which has a great influence on its performance. At present, there are two main methods for testing the fatigue resistance of materials:
[0005] Compression distortion (permanent compression distortion): used to measure the ability of elastic materials to return to the initial state after a period of compression and heating, which reflects the permanent deformation performance of the material. This test is based on the BG6669 (foamed material) standard, and is measured by a compression deformation instrument and a thickness gauge.
[0006] Sole fatigue tester: mainly used for detecting the fatigue resistance of the sole, and the design of the tester meets the requirements of GB / T38018-2019 standard.
[0007] The existing fatigue test scheme mainly includes two types: one is single long-time (such as 24 hours) test, and the other is multiple (up to tens of thousands of times) short-time (measured in seconds or minutes) test. Although the test equipment and methods are different, both of them apply vertical force to simulate the actual use of the material, and then evaluate the fatigue resistance of the material test piece or the sole.
[0008] However, human movement is a compound movement, which is affected by multi-directional ground reaction force, and the vertical force is only a part of it. If only the vertical fatigue resistance is tested to evaluate and determine the performance of the material in actual movement, it is not comprehensive and has defects. SUMMARY
[0009] The utility model discloses a shoe sole dynamic fatigue test equipment for solving the above problems.
[0010] In order to achieve the above object, the utility model discloses a shoe sole dynamic fatigue test equipment, include base, controller, punch press and test table, the test table is installed on the base, punch press is arranged at the upside of test table. The test table includes fixed base, shoe fixed plate, clamp and elevating gear, the clamp is installed on the shoe fixed plate, is used for fixing shoe sole or shoes, the fixed base and elevating gear interval setting are arranged on the base, one side of shoe fixed plate is hinged with fixed base, the other side of shoe fixed plate is connected with elevating gear, and the elevating gear is used for adjusting the included angle alpha between shoe fixed plate and horizontal plane. The controller is used for controlling punch press and elevating gear action. The bottom of punch press is provided with impact head, and impact head moves along the vertical direction, and impact head is used for impacting the shoe sole on the clamp, and the impact head is equipped with a pressure sensor, and the pressure sensor is used for real -time detection shoe sole and the pressure of the contact surface of impact head, and signal feedback is passed to the controller.
[0011] Preferably, the pressure range of the punch press device is 0-5000N, and the working frequency is 0-50HZ.
[0012] Preferably, the elevating gear is a pneumatic cylinder or a hydraulic cylinder.
[0013] Preferably, the piston rod of the elevating gear is hinged with the shoe fixed plate, and the bottom of the elevating gear is hinged with the base.
[0014] Preferably, the bottom of the side of the shoe fixed plate close to the elevating gear is fixedly connected with an ear seat, and a sliding groove is formed in the ear seat; a sliding block is arranged on the piston rod of the elevating gear, and the sliding block moves in the range of the sliding groove.
[0015] Preferably, it further includes a plurality of support rods, the bottom of the support rod is installed on the base, and the upper part of the punch press device is connected with the support rod.
[0016] Preferably, the impact device is a pneumatic cylinder or a hydraulic cylinder, and the impact head is arranged on the piston rod of the impact device.
[0017] Preferably, a through groove is formed in the middle of the shoe fixing plate, and a plurality of bolt holes are arranged at the top edge of the shoe fixing plate in intervals. The clamp comprises a clamping piece and a fixing rod, the fixing rod is in T shape, the fixing rod comprises a horizontally arranged handle and a vertically arranged connecting rod, a pressing piece is fixedly connected to the middle of the connecting rod, an outer thread is formed in the connecting rod below the pressing piece; a through hole is formed in the clamping piece for the connecting rod to pass through, and the connecting rod is threadedly connected to the bolt hole on the shoe fixing plate after passing through the through hole. Both sides of the shoe fixing plate are provided with clamps for fixing the two ends of the shoe sole.
[0018] Preferably, the data processor is electrically connected with the controller and the pressure sensor.
[0019] The utility model has the following beneficial effects:
[0020] The utility model can accurately simulate the compound force and landing frequency of the foot during the movement process, and when the fatigue performance of the shoe sole material, the finished shoe sole or the finished shoe is tested, the result is more accurate and more in line with the actual situation. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 The utility model provides whole structure schematic view in specific embodiment thereof;
[0022] Figure 2 The utility model provides partial enlarged schematic view of A in specific embodiment thereof;
[0023] Figure 3 The utility model provides structure schematic view of shoe fixing plate in specific embodiment thereof;
[0024] Figure 4 The utility model provides structure schematic view of shoe fixing plate and clamp in specific embodiment thereof;
[0025] Figure 5 The utility model provides whole structure schematic view in specific embodiment thereof;
[0026] Figure 6 The utility model provides partial schematic view in specific embodiment thereof.
[0027] MAIN COMPONENT SYMBOL EXPLANATION
[0028] 100, base; 110, support rod; 120, fixed seat; 130, lifting device; 200, stamping device; 210, pressure sensor; 220, impact head; 300, controller; 400, shoe fixing plate; 401, through slot; 402, threaded hole; 410, connecting lug; 411, sliding groove; 4111, sliding block; 500, clamp; 510, fixed rod; 511, handle; 512, connecting rod; 5121, pressing piece; 520, clamping piece; 600, data processing device. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples.
[0030] Example one
[0031] As Figures 1-6 The utility model provides a kind of shoe sole dynamic fatigue test equipment, it include: base 100, controller 300, stamping device 200 and test bench, test bench is installed on base 100, and stamping device 200 is set in the just above test bench. Test bench includes fixed seat 120, shoe fixing plate 400, clamp 500 and lifting device 130;Clamp 500 is installed on shoe fixing plate 400, for fixing shoe sole or shoe, and fixed seat 120 and lifting device 130 are separately arranged on base 100, one side of shoe fixing plate 400 is hinged with fixed seat 120, the other side of shoe fixing plate 400 is connected with lifting device 130, and lifting device 130 is used to adjust the included angle α between shoe fixing plate 400 and horizontal plane. Controller 300 is used to control the action of stamping device 200 and lifting device 130. The bottom of stamping device 200 is provided with impact head 220, impact head 220 moves along vertical direction, and impact head 220 is used to impact shoe sole on clamp 500;Pressure sensor 210 is arranged on impact head 220, and pressure sensor 210 is used to detect the pressure of the contact surface between shoe sole and impact head 220 in real time, and signal feedback is transmitted to controller 300.
[0032] In the embodiment, the pressure range of stamping device 200 is 0-5000N. The working frequency of stamping device 200 is 0-50HZ. Stamping device 200 is air cylinder or hydraulic cylinder. Lifting device 130 is air cylinder or hydraulic cylinder, and impact head 220 is arranged on the piston rod of lifting device 130.
[0033] In this embodiment, the shoe fixing plate 400 is fixedly connected with an ear seat on the side close to the lifting device 130, and a sliding groove 411 is formed in the ear seat; a sliding block 4111 is arranged on the piston rod of the lifting device 130, and the sliding block 4111 moves in the range of the sliding groove 411. When the lifting device 130 pushes or pulls the sliding block 4111, the sliding of the sliding block 4111 in the sliding groove 411 can compensate for the position difference of the shoe fixing plate 400 during the change of the angle. This structure can simulate the lifting and lowering actions of the feet during walking or movement. When the lifting device 130 drives one side of the shoe fixing plate 400 to rise or fall, the sole can be at different inclination angles, just like the posture of the feet changes constantly during walking. For example, during walking, the feet will have a process of lifting from the heel, landing on the sole, and then lifting from the toe. The lifting device 130 of the equipment can partially reproduce this dynamic process, so that the sole test is closer to the actual use scenario.
[0034] The clamp 500 is installed on the shoe fixing plate 400 for fixing the sole or shoe, which facilitates the test of different types and sizes of soles. Whether it is a sole alone or a complete shoe, it can be fixed firmly on the test table. For example, the soles of sports shoes, leather shoes, casual shoes and other shoes can be tested, and fatigue tests can be performed on soles of different brands and sizes. It is not necessary to specially design a fixing device for each sole, which improves the universality of the equipment.
[0035] The controller 300 is used to control the action of the stamping device 200, and can control the impact frequency and impact force of the impact head 220. For example, the sole can be continuously impacted at a certain frequency and force, simulating the periodic pressure on the sole during long-time walking or movement. Moreover, the vertical movement of the impact head 220 makes the impact direction stable and predictable, which is conducive to obtaining stable and reliable test data and facilitating researchers to accurately evaluate the performance change of the sole under dynamic fatigue.
[0036] A through groove 401 is formed in the middle of the shoe fixing plate 400, and a plurality of bolt holes are arranged at the top edge of the shoe fixing plate 400 in a spaced manner. The clamp 500 includes a clamping piece 520 and a fixing rod 510, the fixing rod 510 is in a T shape, and the fixing rod 510 includes a handle 511 arranged horizontally and a connecting rod 512 arranged vertically, the connecting rod 512 is fixedly connected with a pressing piece 5121 in the middle, and an outer thread is formed in the connecting rod 512 below the pressing piece 5121; a through hole is formed in the clamping piece 520 for the connecting rod 512 to pass through, and the connecting rod 512 is threadedly connected with the bolt hole on the shoe fixing plate 400 after passing through the through hole. The clamps 500 are arranged on both sides of the shoe fixing plate 400 for fixing the two ends of the sole.
[0037] In this embodiment, a through slot 401 is formed in the middle of the shoe fixing plate 400, and clamps 500 are arranged on both sides. This arrangement can effectively fix the shoe sole from both ends. During the test, when the impact head 220 impacts the shoe sole, the fixing force from both ends can well limit the displacement of the shoe sole, preventing the shoe sole from easily moving or being detached from the fixing device when subjected to impact force.
[0038] The fixing rod 510 of the clamp 500 is in T shape, with a handle 511 to facilitate the operator to tighten or loosen the fixing rod 510. An external thread is arranged on the connecting rod 512, which is threadedly connected to the bolt hole on the shoe fixing plate 400. This threaded connection has strong self-locking ability. Once the fixing rod 510 is threadedly connected to the shoe fixing plate 400, it is not easy to loosen during the test under vibration and impact, and can continuously and stably exert pressure on the clamping piece 520, thereby ensuring that the clamping piece 520 tightly clamps the shoe sole, making the shoe sole more firmly fixed.
[0039] Multiple bolt holes are arranged at intervals on the top edge of the shoe fixing plate 400, which allows the position of the clamp 500 on the shoe fixing plate 400 to be adjusted according to the size of the shoe sole. The length and width of shoe soles of different brands, styles and sizes are different. By selecting bolt holes at different positions to install the clamp 500, shoe soles of various sizes can be adapted. For example, for a longer shoe sole, the clamp 500 can be installed on bolt holes farther apart; for a shorter shoe sole, the clamp 500 can be installed on bolt holes closer together, thereby flexibly fixing shoe soles of different sizes.
[0040] The device also includes a pressure sensor 210 arranged between the piston rod of the lifting device 130 and the impact head 220.
[0041] The device also includes a data processing device 600 electrically connected to the controller 300 and the pressure sensor 210.
[0042] In this embodiment, the data processing device 600 is a computer. The data processing device 600 can receive pressure data from the pressure sensor 210 in real time and quickly analyze it. It can calculate the average, peak, and valley values of the impact force, as well as the frequency of pressure changes and other key parameters.
[0043] In order to accurately evaluate the fatigue resistance of shoe sole materials, based on in-depth research on the laws of walking and running movements and the anatomical characteristics of the human body, the device uses high-speed photography, force platforms, plantar pressure plates, finite element simulation, and other means to simulate the repeated compression process of the foot on the shoe sole material in actual wear. The specific settings are as follows:
[0044] Device frequency, time, and force settings:
[0045] Through the force platform and high-speed camera analysis, it is concluded that the step frequency is between 120-190, the landing time is 100-300 ms, the vertical pressure is 600-2500 N, and the horizontal pressure is 20-200 N. According to these data, the compression frequency, compression force and compression time on the material of the pressure pump are accurately set.
[0046] Confirmation of the diameter of the impact head 220:
[0047] Usually, the landing position is the heel when running, but the size of the heel is different for different styles and shoe sizes. Therefore, the diameter of the impact head 220 is set to four specifications, 15 cm, 20 cm, 25 cm and 30 cm, to meet different testing needs.
[0048] Impact frequency:
[0049] The total number of marathon steps is about 30,000-40,000 steps, and the number of steps in cross-country races or ultra-marathons is more likely to exceed 100,000 times. Based on this, the single continuous impact frequency of the device is set to 200,000 times, which basically covers the single landing compression time of all sports, ensuring that the stress state of the sole in various sports scenarios is simulated comprehensively.
[0050] Confirmation of the force value change of the impact device 200 during landing:
[0051] By analyzing the direction and size of the ground reaction force measured by the force platform during the landing period of the foot during running, the force values in the vertical and horizontal directions are determined based on the direction and force value of the resultant force, so that the device can more accurately simulate the actual stress state.
[0052] Example two
[0053] The difference between this embodiment and example one is that the slider 4111 and the sliding groove 411 in example one are cancelled, and the piston rod of the lifting device 130 is hinged to the shoe fixing plate 400 in example two, and the bottom of the lifting device 130 is hinged to the base 100, so that when the piston rod of the lifting device 130 extends and retracts, the angle α between the shoe fixing plate 400 and the horizontal plane changes.
[0054] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A sole dynamic fatigue testing apparatus, characterized by, The application relates to a sole dynamic fatigue testing device, which comprises a base (100), a controller (300), a stamping device (200) and a testing table, wherein the testing table is installed on the base (100), and the stamping device (200) is arranged directly above the testing table. The testing table comprises a fixing seat (120), a shoe fixing plate (400), a clamp (500) and a lifting device (130), wherein the clamp (500) is installed on the shoe fixing plate (400) and used for fixing a sole or a shoe, the fixing seat (120) and the lifting device (130) are arranged on the base (100) at intervals, one side of the shoe fixing plate (400) is hinged to the fixing seat (120), the other side of the shoe fixing plate (400) is connected to the lifting device (130), and the lifting device (130) is used for adjusting the included angle alpha between the shoe fixing plate (400) and a horizontal plane. The controller (300) is used for controlling the actions of the stamping device (200) and the lifting device (130). The bottom of the stamping device (200) is provided with an impact head (220), the impact head (220) moves along a vertical direction, the impact head (220) is used for impacting the sole on the clamp (500), a pressure sensor (210) is arranged on the impact head (220), the pressure sensor (210) is used for detecting the pressure of a contact surface between the sole and the impact head (220) in real time, and signals are fed back to the controller (300).
2. The sole dynamic fatigue testing device according to claim 1, wherein the pressure range of the stamping device (200) is 0-5000N, and the working frequency is 0-50HZ.
3. The sole dynamic fatigue testing device according to claim 1, wherein the lifting device (130) is a pneumatic cylinder or a hydraulic cylinder.
4. The sole dynamic fatigue testing device according to claim 3, wherein the piston rod of the lifting device (130) is hinged to the shoe fixing plate (400), and the bottom of the lifting device (130) is hinged to the base (100).
5. The sole dynamic fatigue testing device according to claim 3, wherein the side of the shoe fixing plate (400) close to the bottom of the lifting device (130) is fixedly connected with an ear seat (410), the ear seat (410) is provided with a sliding groove (411), the piston rod of the lifting device (130) is provided with a sliding block (131), and the sliding block (131) moves in the range of the sliding groove (411).
6. The sole dynamic fatigue testing device according to claim 1, wherein a plurality of supporting rods (110) are further arranged, the bottom of the supporting rod (110) is installed on the base (100), and the stamping device (200) is connected to the upper part of the supporting rod (110).
7. The sole dynamic fatigue testing device according to claim 1, wherein the impact device (200) is a pneumatic cylinder or a hydraulic cylinder, and the impact head (220) is arranged on the piston rod of the impact device (200). 8. The sole dynamic fatigue test equipment according to claim 1, characterized in that: a through groove (401) is formed in the middle of the shoe fixing plate (400), and a plurality of bolt holes are arranged at the top edge of the shoe fixing plate (400) in intervals; the clamp (500) comprises a clamping piece (520) and a fixing rod (510), the fixing rod (510) is in T shape, the fixing rod (510) comprises a handle (511) arranged horizontally and a connecting rod (512) arranged vertically, the middle of the connecting rod (512) is fixedly connected with a pressing piece (5121), an outer thread is formed in the connecting rod (512) below the pressing piece (5121); a through hole is formed in the clamping piece (520) for the connecting rod (512) to pass through, and the connecting rod (512) is threadedly connected with the bolt hole on the shoe fixing plate (400) after passing through the through hole; the two sides of the shoe fixing plate (400) are provided with clamps (500) for fixing the two ends of the sole.
9. The sole dynamic fatigue test equipment according to any one of claims 1-8, characterized in that: a data processor (600) is further included, and the data processor (600) is electrically connected with the controller (300) and the pressure sensor (210).