Multifunctional test tool for sole sample

Abstract

The invention discloses a sole sample multifunctional test tool, which comprises an equipment table, a first test seat and a second test seat, and is characterized in that a main shaft is rotatably connected between the first test seat and the second test seat; the first test seat is provided with a first test assembly which is used for fixing an external to-be-tested sole and bending the to-be-tested sole when the main shaft rotates so as to test the bending durability of the to-be-tested sole. The second test seat is provided with a second test assembly which is used for fixing an external to-be-tested shoe sole and twisting the to-be-tested shoe sole when the main shaft rotates so as to test the torsion toughness and the shear resistance of the to-be-tested shoe sole. The equipment table is provided with a driving assembly which is used for driving the main shaft to do reciprocating rotation motion. The problems that in the prior art, when multiple performance tests are carried out on the shoe sole sample, multiple independent devices need to be depended on, each device needs to be provided with an independent driving source, and the test requirements of shoe soles with different hardness cannot be met easily, so that the test process is tedious, the device investment cost is high, and the universality is poor are solved.

Description

Technical Field

[0001] This invention relates to the field of shoe sole sample testing equipment, specifically a multifunctional testing fixture for shoe sole samples. Background Technology

[0002] As a core functional component of footwear products, the sole's flexural durability, torsional toughness, and shear resistance directly determine the shoe's wearing comfort, safety, and lifespan. Therefore, accurate testing of these multiple properties is a crucial step in ensuring product quality during sole research and development, production, and quality inspection.

[0003] In the prior art, tests on the flexural durability, torsional toughness, and shear resistance of shoe soles are usually performed by separate, single-function testing devices. For example, the device used to test flexural durability can only perform reciprocating bending motions of the shoe sole, and its drive system is specifically adapted to the motion trajectory of the bending test. The device used to test torsional toughness and shear resistance requires a separate torsional drive mechanism, and each device has an independent sample fixing component and control unit. The aforementioned decentralized testing model has the following significant drawbacks: First, configuring multiple independent devices requires enterprises to invest heavily in equipment procurement costs, and the large space occupied by multiple devices increases the cost of using production or testing sites. Second, each device needs to be equipped with a separate drive source (such as a motor, cylinder, etc.) and a corresponding power transmission system, which not only leads to complex equipment structures and high energy consumption, but also increases the difficulty and cost of daily equipment maintenance. Third, the sample fixing components of existing equipment are mostly rigid structures or fixed clamping methods, and the power output used to achieve the bending of shoe sole samples is constant across different testing devices, making it difficult to adjust to adapt to bending tests of shoe sole samples with different hardness or to meet the requirements of tests with different bending degrees. Fourth, multiple performance tests require the shoe sole samples to be transferred and re-clamped multiple times between different devices, which is not only cumbersome and time-consuming, but may also cause sample positioning deviations due to multiple clamping, further reducing the consistency of test data.

[0004] The aforementioned problems result in existing testing solutions having shortcomings in practical applications, such as low testing efficiency, high equipment investment and usage costs, and poor versatility and adaptability. These shortcomings make it difficult to meet the needs of enterprises for efficient, low-cost, and highly adaptable testing equipment in scenarios such as sole R&D iteration and batch quality inspection. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a multifunctional testing fixture for shoe sole samples. This fixture solves the problems of cumbersome testing processes, high equipment costs, and poor versatility caused by the need for multiple independent devices, each requiring a separate drive source, and difficulty in adapting to testing requirements of shoe soles with different hardnesses when performing multiple performance tests on shoe sole samples.

[0006] To achieve the above objectives, the present invention provides a multifunctional testing fixture for shoe sole samples, including a device platform, a first testing seat, and a second testing seat. The first testing seat and the second testing seat are arranged opposite to each other and are rotatably connected by a main shaft. The first testing seat is provided with a first testing component for fixing the external shoe sole to be tested and bending the shoe sole to be tested when the main shaft rotates to test the bending durability of the shoe sole. The second testing seat is provided with a second testing component for fixing the external shoe sole to be tested and twisting the shoe sole to be tested when the main shaft rotates to test the torsional toughness and shear resistance of the shoe sole. The device platform is provided with a driving component for driving the main shaft to perform reciprocating rotation.

[0007] The advantages of adopting the above technical solution are as follows: The structural design, in which the first and second test seats are arranged opposite each other and rotatably connected to the main shaft, allows the first test component to stably perform the bending durability test of the sole under test, while the second test component simultaneously completes the torsional toughness and shear performance tests. This effectively integrates multiple core testing functions, abandoning the existing model of multiple independent devices conducting dispersed testing, significantly simplifying the testing process and reducing redundancy in testing steps. The aforementioned drive component independently drives the main shaft to perform reciprocating rotation, using a single drive source to replace the independent drive structures configured for multiple devices. This significantly reduces equipment procurement costs and daily energy consumption, reduces the space occupied by the equipment, and lowers the cost of using production or testing sites. Furthermore, it eliminates the need to repeatedly transfer and re-clamp the sole sample between different devices, avoiding positioning deviations caused by multiple clamping operations, ensuring the consistency and accuracy of test data, and improving testing efficiency. The overall structural design is compact and reasonable, with the first and second test components respectively adapting to the core requirements of different performance tests. This enhances the applicability of the tooling in various scenarios such as sole R&D and batch quality inspection, improving the practical value and market competitiveness of the tooling, and reducing the difficulty and cost of daily equipment maintenance.

[0008] The invention further comprises: a first test plate on the first test seat, a first rotating hole on the first test plate for the beginning end of the main shaft to pass through and rotatably connect with the main shaft; several test slots on both sides of the first test plate; the test slots on the same side wall are arranged circumferentially with the first rotating hole as the base point, and the test slots on the same side wall are combined in a cross shape; the first test assembly includes several movable blocks, each movable block corresponding to a test slot, and each movable block is movably disposed in its corresponding test slot along the radius of the first test plate; the first test assembly also includes several fixing parts for clamping and limiting the toe end of the external shoe sole to be tested and several mating parts for clamping and limiting the tail end of the external shoe sole to be tested, each fixing part corresponding to a movable block, and each fixing part being disposed in its corresponding mating part. On the outer top wall of the movable block, several mating parts correspond one-to-one with several test slots, with each mating part located on one side of its corresponding test slot. The mating parts are arranged on the first test plate and close to the adjacent fixed parts. A winding belt is detachably connected between the movable block and the main shaft. The winding belt is inclined relative to the movable block and the main shaft. When the main shaft rotates, the winding belt is wound around the outer peripheral wall of the main shaft to reduce the relative length of the winding belt between the main shaft and the movable block. When the relative length of the winding belt between the main shaft and the movable block decreases, the winding belt drives the movable block to slide towards the main shaft in the test slot to change the relative position between the fixed parts and the mating parts. When the relative position between the fixed parts and the mating parts changes, the toe end and the tail end of the sole to be tested are relatively bent. A return spring is provided between the bottom wall of the movable block and the bottom wall of the test slot.

[0009] The advantages of adopting the above technical solution are as follows: The test slots arranged in a circumferential cross shape on the first test plate, with the first rotating hole as the base point, enable simultaneous multi-station testing of sole bending durability, significantly improving testing efficiency per unit time while balancing testing efficiency and space utilization. The movable block, movably positioned within the test slot along the radius of the first test plate, can be flexibly adjusted according to the size specifications of the sole to be tested, expanding the tooling's adaptability to different sole sizes. Furthermore, the toe and tail ends of the sole are clamped and limited by fixing and fitting components, ensuring that the sole does not slip during the bending test and guaranteeing testing stability. In the above technology, the winding belt, main shaft, and movable block are detachably connected and relatively inclined. When the main shaft rotates, the change in the length of the winding belt drives the movable block to slide precisely, achieving stable relative bending of the toe and tail ends of the sole. The transmission method is smooth and gentle, reducing additional damage to the sole sample during testing. Moreover, the above technology allows for the winding belt to... The increased length of the winding belt increases the sliding position of the movable block, thereby increasing the bending degree of the shoe sole. This is achieved by adjusting the rotation amplitude of the main shaft to regulate the bending degree, meeting the testing requirements for different shoe sole bending degrees. The return spring between the bottom wall of the movable block and the bottom wall of the test slot is compressed and stores elastic potential energy when the main shaft drives the movable block to slide towards the main shaft. When the main shaft rotates in the opposite direction, the return spring releases the elastic potential energy, generating a reverse driving force that quickly returns the movable block to its initial position, providing stable reset for the next round of bending tests. This sliding cooperation structure between the movable block and the test slot ensures precise and controllable bending action, improving the reliability of bending durability testing. The detachable design of the winding belt facilitates later maintenance and component replacement, extending the overall service life of the tooling. The cross-shaped distribution of the test slots maximizes the number of testing positions within a limited space, making the overall structure both practical and economical, further enhancing the adaptability and accuracy of bending tests.

[0010] The invention further comprises: the fixing member including two first clamping plates, the two first clamping plates being arranged opposite each other and forming a first clamping groove between the two first clamping plates for accommodating the toe end of the shoe sole to be tested; two first adjusting shafts being detachably connected between the two first clamping plates, the two first adjusting shafts being arranged on the same side; a first through hole for the first adjusting shaft to pass through on the first clamping plate; both ends of the first adjusting shaft being threadedly connected to a first nut for abutting against the outer wall of the adjacent first clamping plate; one of the two first clamping plates being connected to a first connecting shaft for connecting with a corresponding movable block; and the mating member comprising two... The second clamping plate has two clamping plates arranged opposite each other, with a second clamping groove formed between the two clamping plates to accommodate the tail end of the shoe sole to be tested. Two second adjusting shafts are detachably connected between the two clamping plates, and the two second adjusting shafts are arranged on the same side. The second clamping plates have second through holes for the second adjusting shafts to pass through. Both ends of the second adjusting shafts are threaded with second nuts for abutting against the outer wall of the adjacent second clamping plates. One of the two second clamping plates is connected to a second connecting shaft for connecting to the first test plate. Each first clamping groove is arranged on the same horizontal line as its adjacent second clamping groove.

[0011] The advantages of adopting the above technical solution are as follows: The first clamping groove formed by the two first clamping plates arranged opposite each other can stably accommodate the toe end of the shoe sole to be tested, while the second clamping groove formed by the two second clamping plates is adapted to clamp the heel end of the shoe sole. This double clamping structure ensures the positioning stability of the shoe sole during the bending test. The first adjusting shaft passes through the first clamping plate and cooperates with the first nuts at both ends, allowing for flexible adjustment of the width of the first clamping groove. The second adjusting shaft, in cooperation with the second nuts, adjusts the width of the second clamping groove, adapting to shoe sole samples of different thicknesses and hardnesses, avoiding sample pre-damage or insecure clamping caused by rigid clamping. The first connecting shaft in the above technology connects the fixing component and the movable block. The stable connection ensures that the sliding block drives the toe end of the sole to move synchronously, while the second connecting shaft ensures the reliability of the connection between the mating parts and the first test plate, preventing displacement of the mating parts during the test. In the above technology, the first clamping groove and the adjacent second clamping groove are set on the same horizontal line, ensuring that the force is evenly distributed when the sole is bent, reducing test data deviation caused by force offset, and improving the accuracy of bending test. The detachable connection structure of the adjusting shaft and nut facilitates later maintenance and replacement of parts, reducing the cost of tooling. The clamping plate-type clamping structure has both clamping stability and adjustment flexibility, meeting the clamping requirements of different types of sole bending tests, and further expanding the applicability of the tooling.

[0012] The invention further comprises: a first insertion hole for inserting a first connecting shaft on the movable block; a first toothed groove circumferentially formed on the inner peripheral wall of the first insertion hole; a second toothed groove circumferentially formed on the outer peripheral wall of the first connecting shaft for engaging with the first toothed groove when the first connecting shaft is inserted into the first insertion hole; a first magnetic block embedded in the bottom wall of both the first connecting shaft and the first insertion hole; the first magnetic block on the first connecting shaft and the first magnetic block on the first insertion hole magnetically attracted to each other when the first connecting shaft is inserted into the first insertion hole; a second insertion hole corresponding to each position of the second connecting shaft on the first test plate; a third toothed groove circumferentially formed on the inner peripheral wall of the second insertion hole; a fourth toothed groove circumferentially formed on the outer peripheral wall of the second connecting shaft for engaging with the third toothed groove when the second connecting shaft is inserted into the second insertion hole; a second magnetic block embedded in the bottom wall of both the second connecting shaft and the second insertion hole; the second magnetic block on the second connecting shaft and the second insertion hole magnetically attracted to each other when the second connecting shaft is inserted into the second insertion hole.

[0013] The advantages of adopting the above technical solution are as follows: The first connecting shaft and the first socket of the movable block are connected by an insertion, and the meshing structure of the first and second toothed grooves enhances the connection rigidity between the fixing component and the movable block, preventing relative slippage during testing and ensuring accurate transmission of the bending action at the toe of the shoe sole; the first magnetic block on the bottom wall of the first socket of the first connecting shaft magnetically engages with the first magnetic block, enabling rapid alignment and insertion of the fixing component and the movable block, simplifying the clamping operation process and improving test preparation efficiency; the second connecting shaft and the second socket of the first test disc are connected by an insertion, and the meshing design of the third and fourth toothed grooves ensures a smooth fit. The connection stability between the mating component and the first test plate prevents the mating component from rotating or shifting during testing; the second connecting shaft and the second magnetic block on the bottom wall of the second insertion hole magnetically engage to assist the mating component in quick positioning and installation, reducing clamping deviation; the toothed meshing structure improves the connection firmness, and the magnetic engagement structure improves the clamping convenience. The two work together to balance test stability and operational efficiency; the plug-in connection structure reduces the difficulty of component assembly, facilitates later maintenance and replacement of fasteners or mating components of different specifications, extends the service life of the tooling, ensures clamping reliability under different test scenarios, and further improves the accuracy of bending test data.

[0014] The invention further comprises: limiting grooves formed on the inner walls of both sides of the test groove along the length of the test groove; limiting blocks extending from both sides of the movable block toward their respective adjacent limiting grooves; the limiting blocks slidingly disposed in their corresponding limiting grooves; raceways formed on both sides of the inner walls of the limiting grooves along the length of the limiting grooves; rolling balls rolled on both sides of the limiting blocks; the radial cross-section of the raceways being arc-shaped; and a through hole for the rolling balls being formed on the limiting blocks corresponding to the position of each rolling ball; the diameter of the opening of the through hole being smaller than the diameter of the rolling ball, and the rolling ball being partially exposed at the opening of the through hole; and each rolling ball being movably disposed in its respective adjacent raceway.

[0015] The advantages of adopting the above technical solution are as follows: The limiting grooves on both sides of the test groove slide in conjunction with the limiting blocks on both sides of the movable block, precisely limiting the sliding direction of the movable block and preventing it from shifting or tilting during sliding, thus ensuring precise control of the shoe sole bending action. Furthermore, the raceways on both sides of the limiting grooves roll in conjunction with the balls on the limiting blocks, converting the sliding friction between the movable block and the test groove into rolling friction, significantly reducing friction during sliding, improving the smoothness of the movable block's sliding, and reducing energy loss. Simultaneously, the diameter of the opening of the through hole on the limiting block for the balls to roll is smaller than the diameter of the balls, effectively preventing the balls from slipping out of the through hole. The ball bearings ensure the stability of the rolling structure, and the curved cross-section of the raceway matches the balls, improving their fit and ensuring smooth rolling transmission while reducing vibration during rolling. The ball bearings' rolling mechanism reduces contact wear between the moving block and the test slot, lowering component wear and extending the service life of both. The combined effect of the limiting structure and the rolling fit structure ensures the sliding accuracy of the moving block, improves motion flexibility, reduces energy consumption during testing, enhances the reliability and stability of the fixture, and adapts to long-term, high-frequency reciprocating bending tests, further improving testing efficiency and data stability.

[0016] The invention further comprises: a first connecting bolt detachably connecting the beginning of the winding tape to the corresponding movable block; an adjusting protrusion provided on the outer peripheral wall of the main shaft corresponding to each winding tape position; each adjusting protrusion having an adjusting groove along the length of the main shaft for the corresponding winding tape end to be inserted; a plurality of first connecting holes being provided at the end of the winding tape; a plurality of second connecting holes for communicating with the adjusting groove being provided on the adjusting protrusion along the length of the main shaft; the plurality of second connecting holes being arranged in pairs on the two side walls of the adjusting protrusion; each first connecting hole being aligned with its adjacent second connecting hole; a second connecting bolt threaded between each first connecting hole and two second connecting holes in the same group; each second connecting bolt passing through the corresponding first connecting hole; and the winding tape being made of polyurethane or polyester fiber.

[0017] The advantages of adopting the above technical solution are: the first connecting bolt enables a detachable connection between the beginning of the winding tape and the movable block, facilitating later maintenance and replacement of damaged winding tape, and reducing tooling maintenance costs; the adjusting protrusion on the outer peripheral wall of the main shaft has an adjusting groove for the end of the winding tape to be inserted, and combined with the cooperation of multiple sets of first and second connecting holes, and fixed by the second connecting bolt, the initial length of the winding tape can be flexibly adjusted to adapt to the testing requirements of different bending angles, expanding the testing range of the tooling. The winding length can be adjusted by adjusting the position of the end of the winding tape relative to the main shaft, that is, by replacing the winding tape with different lengths and changing the position of the end of the winding tape on the main shaft, it can adapt to the testing requirements of shoe sole samples with different hardness or different shoe sole sample bending degree testing requirements. The connection hole design allows for precise adjustment of the winding belt tension according to testing requirements, ensuring transmission stability. The winding belt, made of polyurethane or polyester fiber, possesses excellent toughness, wear resistance, and tensile strength, reducing energy loss during transmission, preventing belt breakage from affecting the testing process, and extending the winding belt's service life. The second connecting bolt passes through the first connecting hole and is threadedly connected to the second connecting hole in the same group, ensuring a secure connection between the winding belt end and the adjusting protrusion, preventing the winding belt from loosening during testing. The inclined connection design between the winding belt, the main shaft, and the movable block allows the driving force of the main shaft rotation to be smoothly transmitted to the movable block, enabling smooth sliding of the movable block, reducing sudden force changes during sample bending, preventing additional sample damage, and improving the reliability and accuracy of bending tests.

[0018] The present invention further includes a first test bearing connected between the outer peripheral wall of the starting end of the spindle and the inner peripheral wall of the first rotating hole, wherein the first test bearing is a deep groove ball bearing.

[0019] The advantages of adopting the above technical solution are: the connection between the outer peripheral wall of the spindle and the inner peripheral wall of the first rotating hole of the first test plate can reduce the frictional resistance between the spindle and the first rotating hole during the spindle rotation, improve the smoothness of the spindle reciprocating rotation, reduce the energy consumption of the drive component, and the first test bearing is a deep groove ball bearing, which has good radial and axial load capacity, can adapt to the radial and axial forces during the reciprocating rotation of the spindle, and avoid bearing damage affecting the test process.

[0020] The invention further comprises: a second test plate on the second test base, a second rotating hole on the second test plate for the end of the main shaft to pass through and rotatably connect with the main shaft; several test cavities on both sides of the second test plate; several test cavities on the same side wall arranged circumferentially with the second rotating hole as the base point, and several test cavities on the same side wall combined in a cross shape; each test cavity communicating with the second rotating hole; the second test assembly including several rotating gears, each rotating gear corresponding to a certain number of test cavities, and each rotating gear rotatably connected to its corresponding test cavity by a first rotating pin; two main gears at the end of the main shaft; a driven gear in each test cavity; each driven gear rotatably connected to its corresponding test cavity by a second rotating pin; each rotating gear meshing with its adjacent driven gear; and each driven gear meshing with its adjacent main gear. Each rotating gear position has a test port, and each test port is connected to its adjacent test chamber. At the center of each rotating gear is a first groove for accommodating the head end of the shoe sole to be tested. The opening of the first groove faces the test port. A support arm is provided on one side of each test port on the second test plate. The starting end of each support arm is bent towards the adjacent test port and has two third clamping plates. The two third clamping plates are positioned opposite each other, forming a second groove between them for accommodating the tail end of the shoe sole to be tested. Each second groove is aligned with its corresponding first groove. A third adjusting shaft is detachably connected between the two third clamping plates. A third through hole is provided on each third clamping plate corresponding to the third adjusting shaft. Both ends of the third adjusting shaft are threaded with third nuts for abutting against the outer wall of the adjacent third clamping plates. The support arm consists of several connecting rods and several pins, with adjacent connecting rods hinged together by pins.

[0021] The advantages of adopting the above technical solution are as follows: The test chambers arranged in a circumferential cross shape on the second test plate, with the second rotating hole as the base point, enable simultaneous testing of the torsional toughness and shear resistance of the shoe sole at multiple workstations, significantly improving testing efficiency while balancing space utilization and testing capacity. Specifically, the rotating gear is rotatably connected to the test chamber via the first rotating pin, and the driven gear is rotatably connected to the test chamber via the second rotating pin. The meshing transmission between the rotating gear and the driven gear, and between the driven gear and the main gear, precisely transmits the rotation of the main shaft to the rotating gear, enabling the rotating gear to drive the stable torsion of the shoe sole's toe end, ensuring the accuracy of the torsional and shear resistance tests. The first groove at the center of the rotating gear accommodates the toe end of the shoe sole, and the two third clamping plates at the bent end of the support arm form a second groove to clamp the tail end of the shoe sole. This dual positioning ensures that the shoe sole does not... Slippage may occur; the third adjusting shaft, passing through the third clamping plate and engaging with the third nuts at both ends, allows for flexible adjustment of the width of the second receiving groove, adapting to shoe sole samples of different thicknesses and hardnesses, thus avoiding sample damage or test deviations caused by improper clamping; in the above technology, the support arm is composed of several connecting rods hinged by pins, allowing for flexible adjustment of length and angle, i.e., installing the corresponding number of connecting rods according to the testing requirements (size, hardness, etc.) of the shoe sole sample, thereby adapting to shoe sole samples of different sizes and expanding the applicability of the tooling; the above-mentioned test port is connected to the test cavity, facilitating the installation of shoe sole samples and observation of the testing process, improving operational convenience; through the above-mentioned gear meshing transmission method, transmission deviation is reduced, improving the accuracy of test data, making the overall structure take into account multi-station testing, adaptability, and operational convenience, reducing the complexity of torsional and shear resistance testing.

[0022] The present invention further includes a second test bearing connected between the outer peripheral wall of the end of the main shaft and the inner peripheral wall of the second rotating hole, wherein the first test bearing is a deep groove ball bearing.

[0023] The advantages of adopting the above technical solution are as follows: In the above technology, the connection between the outer peripheral wall of the spindle end and the inner peripheral wall of the second rotating hole of the second test plate can reduce the frictional resistance between the spindle and the second rotating hole during the spindle rotation, improve the smoothness of the spindle reciprocating rotation, ensure that the spindle driving force is accurately transmitted to the second test component, and ensure the accuracy of the torsional toughness and shear performance test. At the same time, the second test bearing is a deep groove ball bearing, which has excellent radial and axial load-bearing capacity, can adapt to the combined force during the reciprocating rotation of the spindle, avoid the bearing damage due to uneven force, and extend the bearing service life.

[0024] The present invention further comprises: the main shaft being divided into a front shaft and a rear shaft, the front shaft and the rear shaft being coaxially arranged; the front shaft being linked and cooperated with the first test component; the rear shaft being linked and cooperated with the second test component; the drive component including a device base and a servo motor mounted on the device platform; a central shaft being rotatably connected to the device base; both the front shaft and the rear shaft being coaxially arranged with the central shaft; both the front shaft and the rear shaft being connected to the central shaft by couplings; pulleys being connected to the output shafts of the central shaft and the servo motor; and a drive belt being connected between the two pulleys.

[0025] The advantages of adopting the above technical solution are as follows: The main shaft is divided into a coaxially arranged front shaft and rear shaft. The front shaft links to the first testing component, and the rear shaft links to the second testing component, enabling simultaneous testing of sole bending durability, torsional toughness, and shear resistance. This improves the flexibility of the tooling and adapts to different testing scenarios. The front and rear shafts are connected to the central shaft via couplings, ensuring coaxial transmission among the three components, reducing deviations during transmission, and ensuring precise transmission of driving force to each testing component, thus improving testing accuracy. The servo motor of the aforementioned drive component provides stable power output, and the pulleys on the central shaft and the output shaft of the servo motor, combined with a transmission belt, achieve smooth power transmission. The device is designed to meet the testing requirements of reciprocating spindle rotation, ensuring smooth transmission and high efficiency. The mounting base provides stable support for the central shaft, enhancing the overall rigidity of the drive structure, preventing shaking during central shaft rotation, and ensuring transmission stability. A single servo motor drive replaces the independent drive structure of multiple devices, significantly simplifying the drive system, reducing equipment procurement costs and energy consumption, and simplifying drive component maintenance. The aforementioned transmission belt has low wear and long service life, reducing drive component replacement costs. The aforementioned coupling connection structure facilitates the disassembly and maintenance of the front, rear, and central shafts, improving the ease of use of the tooling, ensuring long-term stable operation, and further enhancing the tooling's applicability in various scenarios. Attached Figure Description

[0026] Figure 1 This is a three-dimensional view of the present invention; Figure 2 This is a three-dimensional view of the first test component and its linkage structure in this invention; Figure 3 for Figure 2 A partial perspective view; Figure 4 This is a three-dimensional view of the second test component and its linkage structure in this invention; Figure 5 for Figure 4 A partial perspective view; Figure 6 This is a simplified three-dimensional view of the engagement state of the main gear, driven gear, and rotating gear in this invention; Figure 7This is a partially exploded three-dimensional view of the engagement state of the fixed component and the movable block in this invention; Figure 8 This is a partially exploded three-dimensional view of the mating component and the second insertion hole in the present invention. Figure 9 This is a three-dimensional view of the support arm in this invention; Figure 10 This is a three-dimensional view of the fit between the fixing component, the movable block, and the shoe sole sample to be tested in this invention. Figure 11 This is a three-dimensional view of the fit between the third clamping plate and the shoe sole sample to be tested in this invention. Figure 12 This is a simplified view of the engagement state of the limiting block and the limiting groove in this invention. Detailed Implementation

[0027] This invention provides a multifunctional testing fixture for shoe sole samples, including a device platform 1, a first testing seat 2, and a second testing seat 3. The first testing seat 2 and the second testing seat 3 are arranged opposite to each other, and a main shaft 4 is rotatably connected between them. The first testing seat 2 is provided with a first testing component for fixing the external shoe sole to be tested and bending it when the main shaft 4 rotates to test its bending durability. The second testing seat 3 is provided with a second testing component for fixing the external shoe sole to be tested and twisting it when the main shaft 4 rotates to test its torsional toughness and shear resistance. The device platform 1 is provided with a driving component for driving the main shaft 4 to reciprocate. The test base 2 is provided with a first test plate 21. The first test plate 21 has a first rotating hole 211 for the beginning end of the main shaft 4 to pass through and rotatably connect with the main shaft 4. Several test slots 22 are formed on both sides of the first test plate 21. The test slots 22 on the same side wall are arranged circumferentially with the first rotating hole 211 as the base point and are arranged in a cross shape. The first test component includes several movable blocks 23. The movable blocks 23 correspond one-to-one with the test slots 22, and each movable block 23 is movably disposed in its corresponding test slot 22 along the radial direction of the first test plate 21. The first test component also includes several clamping and limiting devices for clamping and limiting the toe end of the shoe sole to be tested. The test includes a set of fixing components and several mating components for clamping and limiting the tail end of the shoe sole to be tested. Each fixing component corresponds to one of several movable blocks 23, and each fixing component is located on the top outer wall of its corresponding movable block 23. Each mating component corresponds to one of several test slots 22, and each mating component is located on one side of its corresponding test slot 22. The mating components are positioned on the first test plate 21, close to the adjacent fixing components. A winding belt 24 is detachably connected between the movable block 23 and the main shaft 4. The winding belt 24 is inclined relative to both the movable block 23 and the main shaft 4. When the main shaft 4 rotates, the winding belt 24 wraps around the outer peripheral wall of the main shaft 4 to reduce the relative length of the winding belt 24 between the main shaft 4 and the movable block 23. When the relative length of the winding belt 24 between the main shaft 4 and the movable block 23 decreases, the winding belt 24 drives the movable block 23 to slide towards the main shaft 4 in the test groove 22 to achieve a change in the relative position between the fixing component and the mating component. When the relative position between the fixing component and the mating component changes, the toe end and the tail end of the sole to be tested are relatively bent. A return spring 231 is provided between the bottom wall of the movable block 23 and the bottom wall of the test groove 22. The fixing component includes two first clamping plates 232, which are arranged opposite to each other and form a first clamping groove 233 between the two first clamping plates 232 for accommodating the toe end of the sole to be tested. Two first adjusting shafts 234 are detachably connected between the two first clamping plates 232.Two first adjusting shafts 234 are arranged on the same side. A first through hole 235 is provided on the first clamping plate 232 for the first adjusting shaft 234 to pass through. Both ends of the first adjusting shaft 234 are threaded with first nuts 236 for abutting against the outer wall of the adjacent first clamping plate 232. One of the two first clamping plates 232 is connected to a first connecting shaft 25 for connecting with a corresponding movable block 23. The mating component includes two second clamping plates 26, which are arranged opposite to each other and a second clamping groove 261 is formed between them to accommodate the tail end of the external shoe sole to be tested. Two second adjusting shafts 262 are detachably connected between the two second clamping plates 26. The second clamping plate 26 is provided on the same side as the second clamping plate 26, and a second through hole 263 is provided on the second clamping plate 26 for the second adjusting shaft 262 to pass through. Both ends of the second adjusting shaft 262 are threaded with a second nut 264 for abutting against the outer wall of the adjacent second clamping plate 26. One of the two second clamping plates 26 is connected to a second connecting shaft 27 for connecting with the first test plate 21. Each first clamping groove 233 is arranged on the same horizontal line as its adjacent second clamping groove 261. The movable block 23 is provided with a first insertion hole 237 for the first connecting shaft 25 to be inserted. A first toothed groove 238 is provided circumferentially on the inner peripheral wall of the first insertion hole 237. A toothed groove 238 is provided circumferentially on the outer peripheral wall of the first connecting shaft 25 for the first connecting shaft 262 to be inserted. When the first connecting shaft 25 is inserted into the first socket 237, a second toothed groove 251 engages with the first toothed groove 238. A first magnet 252 is embedded on the bottom wall of both the first connecting shaft 25 and the first socket 237. When the first connecting shaft 25 is inserted into the first socket 237, the first magnet 252 on the first connecting shaft 25 and the first magnet 252 on the first socket 237 are magnetically attracted to each other. A second socket 212 is provided on the first test disc 21 corresponding to each position of the second connecting shaft 27. A third toothed groove 213 is circumferentially formed on the inner peripheral wall of the second socket 212. A fourth toothed groove 271 is circumferentially formed on the outer peripheral wall of the second connecting shaft 27 for engaging with the third toothed groove 213 when the second connecting shaft 27 is inserted into the second socket 212. 27 and the bottom wall of the second socket 212 are both embedded with second magnetic blocks 214. When the second connecting shaft 27 is inserted into the second socket 212, the second magnetic blocks 214 on the second connecting shaft 27 and the second magnetic blocks 214 on the second socket 212 are magnetically attracted to each other. Limiting grooves 221 are formed on the inner walls of both sides of the test groove 22 along the length of the test groove 22. Limiting blocks 28 extend from both sides of the movable block 23 toward their respective adjacent limiting grooves 221. The limiting blocks 28 are slidably disposed in the corresponding limiting grooves 221. Roller tracks 222 are formed on the inner walls of both sides of the limiting grooves 221 along the length of the limiting grooves 221. Roller balls 281 are rolled on both sides of the limiting blocks 28. The radial cross-section of the roller tracks 222 is arc-shaped.The limiting block 28 has a through hole 282 for each ball 281 to roll. The diameter of the opening of the through hole 282 is smaller than the diameter of the ball 281, and the ball 281 is partially exposed at the opening of the through hole 282. Each ball 281 is movably disposed in its adjacent raceway 222. The beginning of the winding belt 24 is detachably connected to the corresponding movable block 23 by a first connecting bolt 241. The outer peripheral wall of the main shaft 4 has an adjusting protrusion 41 for each winding belt 24. Each adjusting protrusion 41 has an adjusting groove 411 along the length of the main shaft 4 for the end of the corresponding winding belt 24 to be inserted. The end of the winding belt 24 has several first connecting holes. The protrusion 41 has several second connecting holes 412 along the length of the main shaft 4 for communicating with the adjusting groove 411. These second connecting holes 412 are arranged in pairs on both sides of the adjusting protrusion 41. Each first connecting hole is aligned with its adjacent second connecting hole 412. A second connecting bolt 413 is threaded between each pair of second connecting holes 412 corresponding to each first connecting hole. Each second connecting bolt 413 passes through a corresponding first connecting hole. The winding tape 24 is made of polyurethane or polyester fiber. A first test bearing 42 is connected between the outer peripheral wall of the starting end of the main shaft 4 and the inner peripheral wall of the first rotating hole 211. The first test bearing 42 is a deep groove ball bearing. The second test base 3 is provided with a second test plate 31. The second test plate 31 has a second rotating hole 311 for the end of the main shaft 4 to pass through and rotatably connect with the main shaft 4. Several test cavities 32 are provided on both sides of the second test plate 31. The test cavities 32 on the same side wall are arranged circumferentially with the second rotating hole 311 as the base point, and are combined in a cross shape. Each test cavity 32 is connected to the second rotating hole 311. The second test assembly includes several rotating gears 33, each rotating gear 33 corresponding to one of the test cavities 32, and each rotating gear 33 is rotatably connected to its corresponding test cavity 32 by a first rotating pin 331. Two main gears 43 are provided at the end of shaft 4. Each test cavity 32 is provided with a driven gear 321. Each driven gear 321 is rotatably connected to the corresponding test cavity 32 by a second rotating pin. Each rotating gear 33 is meshed with its adjacent driven gear 321, and each driven gear 321 is meshed with its adjacent main gear 43. A test port 312 is provided on the second test disk 31 corresponding to the position of each rotating gear 33. Each test port 312 is connected to its adjacent test cavity 32. A first receiving groove 332 is provided at the center of each rotating gear 33 to accommodate the toe end of the shoe sole to be tested. The opening of the first receiving groove 332 faces the test port 312.The second test plate 31 has a support arm 34 on one side corresponding to each test port 312. The starting end of the support arm 34 is bent towards the adjacent test port 312 and has two third clamping plates 341. The two third clamping plates 341 are arranged opposite each other, and a second receiving groove 342 is formed between the two third clamping plates 341 to accommodate the tail end of the shoe sole to be tested. Each second receiving groove 342 is aligned with a corresponding first receiving groove 332. A third adjusting shaft 343 is detachably connected between the two third clamping plates 341. A third through hole 344 is opened on the third clamping plate 341 corresponding to the position of the third adjusting shaft 343. Both ends of the third adjusting shaft 343 are threaded with third nuts 345 for abutting against the outer wall of the adjacent third clamping plate 341. The support arm 34 is composed of several connecting rods 346 and several pins 347. The main shaft 4 is hinged to the second test bearing 44 via a pin 347. A second test bearing 44 is connected between the outer peripheral wall of the end of the main shaft 4 and the inner peripheral wall of the second rotating hole 311. The first test bearing 42 is a deep groove ball bearing. The main shaft 4 is divided into a front shaft 45 and a rear shaft 46, which are coaxially arranged. The front shaft 45 is linked to the first test component, and the rear shaft 46 is linked to the second test component. The drive component includes a device base 11 and a servo motor 14 mounted on the device platform 1. A central shaft 12 is rotatably connected to the device base 11. Both the front shaft 45 and the rear shaft 46 are coaxially arranged with the central shaft 12, and both are connected to the central shaft 12 via couplings 13. The central shaft 12 and the output shaft of the servo motor 14 are both connected to pulleys 15, and a transmission belt 151 connects the two pulleys 15.

[0028] The overall operation flow of the above-mentioned multi-functional testing fixture for shoe sole samples: 1. Pre-test preparation: Based on the size, thickness, and hardness of the sole to be tested, adjust the clamping structure of the first and second test components. Adjust the width of the first clamping groove using the first adjusting shaft and the first nut, the width of the second clamping groove using the second adjusting shaft and the second nut, and the width of the second receiving groove using the third adjusting shaft and the third nut to ensure stable clamping of the toe and tail ends of the sole. Adjust the length and angle of the support arm using the connecting rod and pin hinge to ensure precise alignment of the second receiving groove with the first receiving groove. Simultaneously, adjust the initial length of the winding tape using different combinations of the first and second connecting holes according to the test requirements. After completing the clamping and parameter preset, check the rotational connection status between the main shaft and the first and second test discs to ensure smooth operation of the first and second test bearings.

[0029] 2. Bending Durability Test Operation: Start the servo motor of the drive component. The servo motor drives the central shaft to rotate through the pulley and transmission belt. The central shaft drives the front shaft to reciprocate synchronously through the coupling. When the front shaft rotates, the winding belt is wrapped around the adjusting protrusion on the outer peripheral wall of the main shaft, so that the relative length between the winding belt, the movable block, and the main shaft gradually decreases. This causes the movable block to slide along the test groove of the first test plate towards the main shaft. The limiting block and the limiting groove cooperate to restrict the sliding direction of the movable block, and the ball and the raceway reduce the sliding friction. The movable block drives the fixed part to move synchronously, so that the relative position between the fixed part and the mating part changes, that is, the fixed part and the mating part are misaligned, thereby realizing the relative bending of the toe end and the tail end of the sole to be tested. The above-mentioned cross-shaped test groove can simultaneously complete the bending durability test of multiple soles. During the test, the reciprocating rotation of the main shaft realizes the cyclic bending of the sole.

[0030] 3. Torsional toughness and shear resistance test operation: If torsional and shear resistance tests need to be performed simultaneously or separately, the servo motor drives the central shaft to rotate, which drives the rear shaft to rotate synchronously through the coupling; the main gear at the end of the rear shaft drives the driven gear inside the test chamber to rotate, and the driven gear further drives the meshing rotating gear to rotate; the first groove at the center of the rotating gear drives the toe end of the sole to rotate, and the third clamp on the support arm fixes the tail end of the sole through the second groove, forming a relative torsional force to achieve the test of the torsional toughness and shear resistance of the sole. The cross-shaped test chamber can complete this test for multiple soles simultaneously, and the gear meshing transmission ensures that the torsional action is accurate and controllable.

[0031] 4. Test completion: After completing the preset number of tests or test duration, turn off the servo motor, stop the drive components, and gradually stop the spindle from reciprocating; remove the first and second connecting bolts, loosen all adjusting nuts, take out the tested shoe sole sample, record the test data, clean all parts of the test fixture, and check the operating status of easily worn parts such as the winding belt, gears, and bearings to ensure that the fixture can be stably put into the next round of testing.

[0032] The overall beneficial effects of the above technology are as follows: By dividing the main shaft into front and rear shafts and linking them separately with the first and second test components, integrated testing of sole bending durability, torsional toughness, and shear resistance is achieved. This completely eliminates the need for multiple independent devices in existing technologies, significantly simplifies the testing process, avoids positioning deviations caused by multiple sample transfers and clamping, and ensures the consistency and accuracy of test data. Using a single servo motor as the drive source, the two tests are synchronously driven through a central shaft, coupling, and pulley transmission structure, replacing the design of multiple devices with separate drive sources. This significantly reduces equipment procurement costs, energy consumption, and space occupation, and reduces the difficulty and cost of daily equipment maintenance. The clamping structure of the first and second test components, combined with multiple sets of adjusting shafts and nuts, can flexibly adapt to different... For shoe sole samples of varying thickness and hardness, the sliding design of the movable block along the test groove and the hinged adjustment structure of the support arm expand the tooling's adaptability to shoe soles of different sizes, avoiding sample pre-damage or insecure clamping caused by rigid clamping. The detachable tilting connection between the winding belt and the main shaft, gear meshing transmission, and the inclusion of accompanying bearings ensure precise and controllable testing actions and smooth transmission, reducing sample damage and component wear during testing and extending the tooling's service life. The cross-shaped circumferentially arranged test grooves and test chambers enable multi-station synchronous testing, combined with the efficient transmission of a single drive source, significantly improving testing efficiency and adapting to various scenarios such as shoe sole R&D iteration and batch quality inspection. The overall structural design is compact and reasonable, combining ease of operation and operational stability, significantly enhancing the tooling's practical value and market competitiveness.

[0033] In the aforementioned technology, the first and second clamping grooves are initially on the same horizontal line. This is to provide a precise initial positioning reference for the sole under test, ensuring the sole is in a naturally extended state before testing. The downward movement of the fixing component causes misalignment between the two, leading to the downward movement of the sole's toe end. The mating component remains fixed, causing the sole to bend in an S-shape. This design is actually a precise simulation of real human walking conditions. The bending portion of the sole's toe end, clamped by the fixing component and moving downwards, corresponds precisely to the natural junction between the forefoot and center of the sole in existing technologies. This area is the main bending stress area of ​​the sole during human walking or exercise. This design can realistically reproduce the shoe's bending characteristics. The bending state of the sole during actual use effectively ensures the authenticity and reliability of the bending durability test results. At the same time, the tooth structure design of the first connecting shaft can be changed according to actual test requirements. That is, it can be directly rotatably connected to the first insertion hole of the movable block. This rotatable connection method allows the fixing part to generate a slight adaptive rotation with the deformation of the sole when it drives the toe end of the sole to bend downwards. This avoids unnatural damage caused by local stress concentration on the sole due to rigid connection. It simplifies the connection structure between the first connecting shaft and the movable block, reduces the difficulty of processing and assembly, and further improves the fit of the test process and the accuracy of the test data.

[0034] It should be noted that the dimensions and specific shapes of the various components (including but not limited to the equipment platform, first test seat, second test seat, main shaft, movable block, fixing parts, mating parts, rotating gears, support arms, etc.) shown in the accompanying drawings of this invention are merely schematic illustrations and do not constitute a limitation on the technical solution of this invention. The core purpose of the drawings is to clearly present the connection relationship, relative position distribution, and assembly method between the various components, so that those skilled in the art can understand the overall structure and working principle of this invention. In actual production or implementation of this invention, the dimensions and shapes of each component can be reasonably adjusted and optimized according to the specifications of the shoe sole to be tested, the requirements of the testing scenario, the processing technology conditions, and the equipment assembly space, etc. As long as they can achieve the corresponding functions described in this invention and meet the linkage and cooperation relationship between the various components, they should all fall within the protection scope of this invention.

[0035] The clamping plates used to hold shoe sole samples in the above-mentioned technology (including the first clamping plate of the fixing component, the second clamping plate of the mating component, and the third clamping plate of the support arm) are not fixed in shape. They can be modified according to the specific shape requirements of the actual shoe sole samples being tested. By adjusting the structural features such as the curvature of the clamping surface and the contour of the edges and corners of the clamping plates, the shape of the clamping grooves (i.e., the first clamping groove, the second clamping groove, and the second receiving groove) formed by the relative arrangement of the clamping plates can be adapted accordingly. This allows for the precise clamping of shoe sole samples of different shapes (such as the widened forefoot sole of sports shoes, the pointed toe sole of leather shoes, and the round toe sole of casual shoes), ensuring the clamping stability of different shaped soles during the testing process and ensuring the smooth conduct of tests on bending durability, torsional toughness, and shear resistance. Furthermore, such adjustments to the shape of the clamping plates based on actual testing requirements, as long as they do not change the core clamping function of each clamping plate and the connection and mating relationship with the corresponding components, should fall within the protection scope of this invention.

[0036] In the above technology, the ball bearings on the limiting block can be made of ceramic material. Ceramic ball bearings have non-magnetic properties, which can effectively prevent magnetic attraction between the first connecting shaft and the first insertion hole, and between the second connecting shaft and the second insertion hole. This prevents magnetic attraction from causing the ball bearings to attract ferromagnetic impurities or be affected by magnetic resistance during movement, ensuring that the ball bearings always roll smoothly in the raceway and maintaining the accuracy and stability of the moving block sliding along the test groove.

[0037] In the above technical solution, a disassembly and assembly window can be provided on the outer wall of each test slot on the first test plate. The window is connected to the test slot and its opening size is adapted to the overall outline of the movable block, so that the operator can quickly complete the assembly, disassembly and maintenance of the movable block and the test slot through the window, including the replacement of the movable block, the connection and debugging of the winding belt and the movable block, and the inspection of the limit block and the ball. At the same time, the opening of the disassembly and assembly window does not weaken the structural strength of the first test plate, nor does it change the sliding fit relationship between the movable block and the test slot or the transmission logic of the winding belt. It only provides operating space for the disassembly and assembly of the movable block. As long as the movable block can be easily disassembled and assembled without affecting the realization of the core testing function of the tooling, it should fall within the protection scope of this invention.

[0038] The aforementioned shoe sole sample to be tested is marked as 5 in the attached diagram of the instruction manual.

[0039] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional testing fixture for shoe sole samples, characterized in that: The device includes a platform, a first test stand, and a second test stand. The first and second test stands are arranged opposite each other and are rotatably connected by a main shaft. The first test stand is provided with a first test component for fixing the external shoe sole to be tested and bending the shoe sole to be tested when the main shaft rotates to test the bending durability of the shoe sole. The second test stand is provided with a second test component for fixing the external shoe sole to be tested and twisting the shoe sole to be tested when the main shaft rotates to test the torsional toughness and shear resistance of the shoe sole. The platform is provided with a drive component for driving the main shaft to perform reciprocating rotation.

2. The multifunctional testing fixture for shoe sole samples according to claim 1, characterized in that: The first test base is provided with a first test plate, which has a first rotating hole for the beginning end of the main shaft to pass through and rotatably connect with the main shaft. Several test slots are formed on both sides of the first test plate. The test slots on the same side wall are arranged circumferentially with the first rotating hole as the base point, and the test slots on the same side wall are combined in a cross shape. The first test assembly includes several movable blocks, each corresponding to a test slot, and each movable block is movably disposed in its corresponding test slot along the radius of the first test plate. The first test assembly also includes several fixing members for clamping and limiting the toe end of the external shoe sole to be tested and several mating members for clamping and limiting the tail end of the external shoe sole to be tested. Each fixing member corresponds to a movable block, and each fixing member is disposed in its corresponding movable block. On the top outer wall of the block, several mating parts correspond one-to-one with several test slots, and each mating part is located on one side of its corresponding test slot. The mating parts are set on the first test plate and are positioned close to the adjacent fixed parts. A winding belt is detachably connected between the movable block and the main shaft. The winding belt is inclined relative to the movable block and the main shaft respectively. When the main shaft rotates, the winding belt is wound around the outer peripheral wall of the main shaft to reduce the relative length of the winding belt between the main shaft and the movable block. When the relative length of the winding belt between the main shaft and the movable block decreases, the winding belt drives the movable block to slide towards the main shaft in the test slot to realize the change of the relative position between the fixed parts and the mating parts. When the relative position between the fixed parts and the mating parts changes, the toe end and the tail end of the sole to be tested are relatively bent. A return spring is provided between the bottom wall of the movable block and the bottom wall of the test slot.

3. The multifunctional testing fixture for shoe sole samples according to claim 2, characterized in that: The fixing component includes two first clamping plates, which are arranged opposite each other and have a first clamping groove between them for accommodating the toe end of the shoe sole to be tested. Two first adjusting shafts are detachably connected between the two first clamping plates, and are arranged on the same side. Each first clamping plate has a first through hole for the first adjusting shaft to pass through. Both ends of each first adjusting shaft are threaded with a first nut for abutting against the outer wall of an adjacent first clamping plate. One of the two first clamping plates is connected to a first connecting shaft for connecting to a corresponding movable block. The mating component includes two second clamping plates. Two second clamping plates are arranged opposite each other, and a second clamping groove is formed between the two second clamping plates to accommodate the tail end of the shoe sole to be tested. Two second adjusting shafts are detachably connected between the two second clamping plates. The two second adjusting shafts are arranged on the same side. A second through hole is opened on the second clamping plate for the second adjusting shaft to pass through. Both ends of the second adjusting shaft are threaded with a second nut for abutting against the outer wall of the adjacent second clamping plate. One of the two second clamping plates is connected to a second connecting shaft for connecting to the first test plate. Each first clamping groove is arranged on the same horizontal line as its adjacent second clamping groove.

4. The multifunctional testing fixture for shoe sole samples according to claim 3, characterized in that: The movable block has a first insertion hole for inserting the first connecting shaft. A first toothed groove is circumferentially formed on the inner peripheral wall of the first insertion hole. A second toothed groove is circumferentially formed on the outer peripheral wall of the first connecting shaft for engaging with the first toothed groove when the first connecting shaft is inserted into the first insertion hole. A first magnetic block is embedded in the bottom wall of both the first connecting shaft and the first insertion hole. When the first connecting shaft is inserted into the first insertion hole, the first magnetic block on the first connecting shaft and the first magnetic block on the first insertion hole are magnetically attracted to each other. A second insertion hole is provided on the first test plate corresponding to each position of the second connecting shaft. A third toothed groove is circumferentially formed on the inner peripheral wall of the second insertion hole. A fourth toothed groove is circumferentially formed on the outer peripheral wall of the second connecting shaft for engaging with the third toothed groove when the second connecting shaft is inserted into the second insertion hole. A second magnetic block is embedded in the bottom wall of both the second connecting shaft and the second insertion hole. When the second connecting shaft is inserted into the second insertion hole, the second magnetic block on the second connecting shaft and the second magnetic block on the second insertion hole are magnetically attracted to each other.

5. The multifunctional testing fixture for shoe sole samples according to claim 2, characterized in that: Limiting grooves are formed on the inner walls of both sides of the test groove along the length of the test groove. Limiting blocks extend from both sides of the movable block toward their respective adjacent limiting grooves. The limiting blocks are slidably disposed in their corresponding limiting grooves. Roller tracks are formed on both sides of the inner walls of the limiting grooves along the length of the limiting grooves. Balls are rolled on both sides of the limiting blocks. The radial cross-section of the roller tracks is arc-shaped. A through hole is formed on the limiting block corresponding to the position of each ball for the ball to roll. The diameter of the opening of the through hole is smaller than the diameter of the ball, and the ball is partially exposed at the opening of the through hole. Each ball is movably disposed in its respective adjacent roller track.

6. The multifunctional testing fixture for shoe sole samples according to claim 2, characterized in that: A first connecting bolt is detachably connected between the beginning of the winding tape and the corresponding movable block. An adjusting protrusion is provided on the outer peripheral wall of the main shaft for each winding tape position. Each adjusting protrusion has an adjusting groove along the length of the main shaft for the corresponding winding tape end to be inserted. The winding tape end has several first connecting holes. Several second connecting holes for communicating with the adjusting groove are provided on the adjusting protrusion along the length of the main shaft. The several second connecting holes are arranged in pairs on the two side walls of the adjusting protrusion. Each first connecting hole is aligned with its adjacent second connecting hole. A second connecting bolt is threaded between each first connecting hole and two second connecting holes in the same group. Each second connecting bolt passes through the corresponding first connecting hole. The winding tape is made of polyurethane or polyester fiber.

7. The multifunctional testing fixture for shoe sole samples according to claim 2, characterized in that: A first test bearing is connected between the outer peripheral wall of the starting end of the spindle and the inner peripheral wall of the first rotating hole. The first test bearing is a deep groove ball bearing.

8. The multifunctional testing fixture for shoe sole samples according to claim 1, characterized in that: The second test base is provided with a second test plate. The second test plate has a second rotating hole for the end of the main shaft to pass through and rotatably connect with the main shaft. Several test cavities are formed on both sides of the second test plate. The test cavities on the same side wall are arranged circumferentially around the second rotating hole, and the test cavities on the same side wall are combined in a cross shape. Each test cavity is connected to the second rotating hole. The second test assembly includes several rotating gears, each rotating gear corresponding to one of the test cavities. Each rotating gear is rotatably connected to its corresponding test cavity by a first rotating pin. Two main gears are provided at the end of the main shaft. Each test cavity has a driven gear, and each driven gear is rotatably connected to its corresponding test cavity by a second rotating pin. Each rotating gear meshes with its adjacent driven gear, and each driven gear meshes with its adjacent main gear. The second test plate has a corresponding rotating hole on each test cavity. Each rotating gear has a test port, which is connected to its adjacent test chamber. Each rotating gear has a first groove at its center to accommodate the head end of the shoe sole to be tested. The opening of the first groove faces the test port. A support arm is provided on one side of each test port on the second test plate. The starting end of each support arm is bent towards the adjacent test port and has two third clamping plates. The two third clamping plates are positioned opposite each other, forming a second groove between them to accommodate the tail end of the shoe sole to be tested. Each second groove is aligned with its corresponding first groove. A third adjusting shaft is detachably connected between the two third clamping plates. A third through hole is provided on each third clamping plate corresponding to the third adjusting shaft. Both ends of the third adjusting shaft are threaded with third nuts for abutting against the outer wall of the adjacent third clamping plates. The support arm consists of several connecting rods and several pins, with adjacent connecting rods hinged together by pins.

9. A multifunctional testing fixture for shoe sole samples according to claim 8, characterized in that: A second test bearing is connected between the outer peripheral wall of the end of the main shaft and the inner peripheral wall of the second rotating hole, and the first test bearing is a deep groove ball bearing.

10. The multifunctional testing fixture for shoe sole samples according to claim 1, characterized in that: The main shaft is divided into a front shaft and a rear shaft, which are coaxially arranged. The front shaft is linked with the first test component, and the rear shaft is linked with the second test component. The drive component includes a device base and a servo motor mounted on the equipment platform. A central shaft is rotatably connected to the device base. Both the front and rear shafts are coaxial with the central shaft, and both the front and rear shafts are connected to the central shaft by couplings. Both the central shaft and the output shaft of the servo motor are connected to pulleys, and a drive belt is connected between the two pulleys.

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