Tensile strength detection device for four-way stretch fabric

Abstract

The invention discloses a four-way stretch fabric tensile strength detection device, and relates to the technical field of fabric detection. The device comprises a box body, the top of the box body is fixedly connected with a workbench panel, the top of the workbench panel is provided with a control panel, the box body is internally provided with a bidirectional traction driving mechanism, the top of the box body is provided with a self-locking winding mechanism, and the top of the box body is provided with a transverse stretching mechanism. Through the arrangement of the bidirectional traction driving mechanism and the self-adaptive floating clamping mechanism, the bidirectional traction driving mechanism drives a driving synchronous belt wheel to rotate through a driving motor, then a driven synchronous belt wheel and a lead screw are driven through a synchronous belt to rotate, a lead screw nut is arranged on the lead screw in a sleeving mode to do linear motion, and a traction sliding block moves up and down along with the lead screw nut; the longitudinal stable traction of the cloth is realized, the clamping force can be automatically adjusted according to the tension state of the cloth, and the accuracy and the stability of the test are improved.

Description

Technical Field

[0001] This invention relates to the field of fabric testing technology, specifically to a device for testing the tensile strength of four-way stretch fabric. Background Technology

[0002] In the fabric manufacturing and processing industry, four-way stretch fabric is widely used in various clothing and home decoration fields due to its unique elastic properties. However, the tensile strength of the fabric, as one of the key indicators for measuring its quality, is directly related to the durability and service life of the product.

[0003] According to a published specification (Publication No.: CN120577100A), a textile fabric tensile strength testing device includes a fixed base, a connecting plate fixedly mounted on the fixed base, a clamping structure mounted on the side wall of the connecting plate, a fixed frame slidably connected to the side wall of the connecting plate, a testing clamping plate mounted on the fixed frame via an adjustment structure, and a force sensor fixedly mounted on the testing clamping plate; a smoothing structure, including a movable plate slidably connected to the inner wall of the fixed frame, a sliding block fixedly connected to the side wall of the movable plate, and a sliding groove corresponding to the sliding block on the inner wall of the fixed frame. This invention smooths the fabric before testing, keeping it flat and avoiding wrinkles. Therefore, the test data is more accurate, reducing testing errors. Furthermore, the smoothing roller rotates during its movement, improving the smoothing effect.

[0004] In the aforementioned application, although pre-treatment of the fabric by smoothing the structure can improve the accuracy of the test, the device can only perform unidirectional tensile testing and cannot comprehensively evaluate the tensile properties of four-way stretch fabric in multiple dimensions such as longitudinal, transverse and diagonal. Its clamping structure lacks adaptive adjustment capability, and the clamping is prone to loosening due to elastic deformation of the fabric during the stretching process, which in turn affects the stability of the test data. Therefore, we propose a device for testing the tensile strength of four-way stretch fabric. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a device for testing the tensile strength of four-way stretch fabric, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a four-way elastic fabric tensile strength testing device, comprising a housing, a workbench panel fixedly connected to the top of the housing, a control panel provided on the top of the workbench panel, a bidirectional traction drive mechanism provided inside the housing, a self-locking winding mechanism provided on the top of the housing, a transverse stretching mechanism provided on the top of the housing, and a protective shell fixedly connected to the top of the workbench panel.

[0007] The bidirectional traction drive mechanism includes a motor mounting base fixedly connected to the bottom inner side of the housing. A drive motor is fixedly connected to the top of the motor mounting base, and a driving synchronous pulley is fixedly connected to the output shaft of the drive motor. A support mounting plate is fixedly connected to the bottom of the worktable panel, and an adjustable tension wheel is provided at the bottom of the support mounting plate. A lead screw is rotatably connected through the top of the worktable panel, and a driven synchronous pulley is fixedly connected to one end of the lead screw. The driving synchronous pulley and the driven synchronous pulley are connected by a synchronous belt drive. A guide column is fixedly connected to the top of the worktable panel. A lead screw nut sleeve is threadedly connected to the circumferential surface of the lead screw, and a traction slider is fixedly connected to the circumferential surface of the lead screw nut sleeve. A flip-up mounting bracket is provided on the top of the traction slider, and a fabric winding roller is rotatably connected through the side of the mounting bracket. The bidirectional traction drive mechanism is driven by the drive motor, which drives the lead screw to rotate, thereby stably driving the traction slider to move up and down.

[0008] The top of the workbench panel is equipped with an adaptive floating clamping mechanism, which includes a pressure-sensing base. The pressure-sensing base is fixedly connected to the top of the workbench panel. A fixed plate is fixedly connected to the top of the pressure-sensing base. A clamping drive cylinder is fixedly connected to the bottom of the fixed plate. A swinging clamping arm is hinged to the top of the fixed plate. An anti-slip friction wheel is fixedly connected to the end of the swinging clamping arm away from the fixed plate. A guide connecting post is slidably connected through the side of the swinging clamping arm. An outer limiting plate is fixedly connected to one end of the guide connecting post. A pressing arm is hinged to the side of the outer limiting plate. A lower guide roller is slidably connected to the side of the pressing arm. An upper pressing roller is rotatably connected through the side of the pressing arm. The pressing arm rotates around the hinge point under the action of the lower guide roller contacting the fabric and being moved upward by the fabric. The upper pressing roller moves downward accordingly, cooperating with the lower guide roller to tightly clamp the fabric. The pressure-sensing base can sense the magnitude of the tension in real time and feed it back to the control system.

[0009] According to the above technical solution, the circumferential surface of the lower guide roller is located on the displacement trajectory of the piston rod end of the clamping drive cylinder. The number of swing clamping arms, anti-slip friction wheels and guide connecting columns are all set in two sets, and they are symmetrically distributed along the vertical central axis of the fixed plate. When the fabric is wrapped around the lower guide roller, the cylinder pneumatically presses the lower guide roller to make it contact the upper pressing roller. Then, the anti-slip friction wheels are driven by the swing clamping arms to further press the fabric from both sides. At this time, the outer limit plate of the pressing arm rotates.

[0010] According to the above technical solution, there are two sets of adjustable tension pulleys, which are symmetrically distributed along the vertical central axis of the drive motor. The circumferential surface of the adjustable tension pulley abuts against the surface of the synchronous belt, ensuring the stability and reliability of the transmission between the active synchronous pulley and the driven synchronous pulley, and avoiding slippage and other phenomena that would affect the normal operation of the bidirectional traction drive mechanism.

[0011] According to the above technical solution, the lead screw is located inside the protective housing. The end of the lead screw away from the driven synchronous pulley is rotatably connected to the top of the protective housing through a bearing. The driven synchronous pulley, lead screw, and lead screw nut sleeve are all provided in two sets, and are symmetrical to each other along the vertical central axis of the worktable panel. This effectively avoids the offset or shaking caused by uneven force on one side, and improves the stability and reliability of the detection device.

[0012] According to the above technical solution, the self-locking winding mechanism includes an outer mounting plate, which is fixedly connected to the side of the protective shell. A hemispherical protrusion is fixedly connected to the side of the outer mounting plate. A transmission support plate is fixedly connected to the top of the traction slider. A transmission shaft is rotatably connected through the side of the transmission support plate. One end of the transmission shaft is fixedly connected to an end face grooved wheel, and a driving pinion is fixedly connected to the end of the transmission shaft away from the end face grooved wheel. A driven large gear is fixedly connected to one end of the fabric winding roller. The traction slider... A spring limiting sleeve is fixedly connected to the top of the device. A return spring is fixedly connected to the inner wall of the spring limiting sleeve. A positioning steel ball is fixedly connected to the end of the return spring away from the spring limiting sleeve. A hemispherical positioning groove is opened on the side of the end face groove wheel. A torsion spring shaft is fixedly connected to the side of the transmission support plate. An anti-reverse pawl is provided on the circumferential surface of the torsion spring shaft. When the tensile force on the fabric approaches the maximum threshold set by the machine, the self-locking winding mechanism is activated, thereby accelerating the tensile test process and enabling the fabric to respond quickly to changes in tensile force.

[0013] According to the above technical solution, the size of the hemispherical protrusion is adapted to the annular guide groove opened on the circumferential surface of the end face groove wheel. The number of hemispherical protrusions is set to several and distributed in a linear array along the side of the outer mounting plate. The driving pinion and the driven gear mesh with each other. The number of teeth of the driving pinion is less than the number of teeth of the driven gear, which ensures that the fabric winding roller can provide stable and sufficient tension during the winding process, prevents the drive shaft from reversing when subjected to reverse tension, and ensures the accuracy of the test results.

[0014] According to the above technical solution, the circumferential surface of the positioning steel ball rolls in contact with the inner wall of the hemispherical positioning groove. The hemispherical positioning groove is provided in a number of places and is distributed in a circular array along the side of the end face groove wheel. The claw tip of the anti-reverse pawl abuts against the tooth root of the driven large gear, ensuring that the fabric will not shrink back due to changes in tension during the winding process, thereby ensuring the stability and reliability of the test data.

[0015] According to the above technical solution, the transverse stretching mechanism includes a base hinge block, which is fixedly connected to the top of the workbench panel. A first-stage connecting rod is hinged to the top of the base hinge block, and a second-stage connecting rod is hinged to the end of the first-stage connecting rod away from the base hinge block. The end of the second-stage connecting rod away from the first-stage connecting rod is fixedly connected to the side of the traction slider through a sliding connecting column. The transverse stretching mechanism can smoothly convert longitudinal movement into transverse stretching force, making the test more diverse, realizing the transverse stretching of four-way elastic fabric, and meeting different testing needs.

[0016] According to the above technical solution, the circumferential surface of the sliding connecting column penetrates and slides through the side of the protective shell. A set of the adaptive floating clamping mechanism is installed at the end of the first-stage connecting rod away from the base hinge block, which can firmly clamp the fabric from both sides to prevent the fabric from slipping during lateral stretching and ensure the accuracy of the lateral stretching test.

[0017] According to the above technical solution, there are three sets of adaptive floating clamping mechanisms. One set is fixedly installed on the top of the workbench panel, and the other two sets are correspondingly installed on the ends of the two first-stage connecting rods away from the base hinge block, thereby achieving the stability of the fabric clamping during testing in various directions.

[0018] This invention provides a device for testing the tensile strength of four-way stretch fabric. It has the following advantages:

[0019] (1) The present invention uses a bidirectional traction drive mechanism and an adaptive floating clamping mechanism to enable the bidirectional traction drive mechanism to drive the active synchronous pulley to rotate through the drive motor, and then drive the driven synchronous pulley and the lead screw to rotate through the synchronous belt. The lead screw nut is fitted on the lead screw and makes linear motion, and the traction slider moves up and down accordingly, thus realizing stable longitudinal traction of the fabric. The adaptive floating clamping mechanism uses a pressure sensing base to monitor the tension in real time. When the fabric is subjected to tension, the lower guide roller contacts the fabric and is pushed upward, driving the clamping arm to rotate around the hinge point. The upper clamping roller moves downward accordingly and closely cooperates with the lower guide roller to clamp the fabric. At the same time, the anti-slip friction wheel further clamps the fabric from both sides, ensuring that the fabric will not slip during the test and can automatically adjust the clamping force according to the change of tension, thus improving the accuracy and stability of the test.

[0020] (2) By setting a self-locking winding mechanism, the present invention enables the self-locking winding mechanism to respond and start quickly when the fabric approaches the maximum tension threshold set by the machine. When the traction slider moves to a specific position, the hemispherical protrusion on the transmission support plate interacts with the annular guide groove of the end face groove wheel, guiding the end face groove wheel to rotate precisely, driving the small gear to rotate accordingly, and through meshing transmission with the driven large gear, driving the fabric winding roller to accelerate the winding of the fabric. The reset spring in the spring limit sleeve pushes the positioning steel ball to embed into the hemispherical positioning groove on the side of the end face groove wheel, forming a stable positioning effect, preventing the end face groove wheel from rotating unexpectedly under the action of tension. The anti-reverse pawl on the torsion spring shaft closely abuts against the tooth root of the driven large gear, ensuring that the fabric winding roller can only rotate in one direction, effectively avoiding the phenomenon of fabric shrinkage caused by tension fluctuation.

[0021] (3) The present invention, through the setting of the transverse stretching mechanism, makes the transverse stretching mechanism securely installed on the workbench panel through the base hinge block. The first-stage connecting rod is hinged to the base hinge block and can rotate flexibly. The second-stage connecting rod is hinged to the first-stage connecting rod to form a connecting rod structure. When the traction slider moves up and down under the action of the bidirectional traction drive mechanism, the second-stage connecting rod is driven to move through the sliding connecting column, thereby causing the first-stage connecting rod to rotate accordingly, converting the longitudinal movement into transverse stretching force. This enables the transverse stretching test of four-way elastic fabric, meets the testing requirements of the transverse tensile strength of the fabric under different testing scenarios, and makes the test more comprehensive and diversified. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall three-dimensional front view of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention in a three-dimensional partial side view;

[0024] Figure 3 This is a schematic diagram of the structure of the present invention in three-dimensional partial cross-section;

[0025] Figure 4 This is an enlarged structural schematic diagram of the three-dimensional drive motor of the present invention;

[0026] Figure 5 This is an enlarged structural schematic diagram of the three-dimensional adaptive floating clamping mechanism of the present invention;

[0027] Figure 6 This is an enlarged structural schematic diagram of the three-dimensional self-locking winding mechanism of the present invention;

[0028] Figure 7 This is an enlarged structural schematic diagram of the three-dimensional adaptive floating clamping mechanism of the present invention.

[0029] In the diagram: 1. Housing; 2. Workbench panel; 3. Control panel; 4. Bidirectional traction drive mechanism; 401. Motor mounting base; 402. Drive motor; 403. Active synchronous pulley; 404. Support mounting plate; 405. Adjustable tension wheel; 406. Lead screw; 407. Driven synchronous pulley; 408. Synchronous belt; 409. Guide column; 410. Lead screw nut sleeve; 411. Traction slider; 412. Mounting bracket; 413. Fabric winding roller; 5. Self-locking winding mechanism; 501. Outer mounting plate; 502. Hemispherical protrusion; 503. Transmission support plate; 504. Transmission shaft; 505. End face grooved wheel; 506. Drive pinion; 507. 508. Driven large gear; 509. Spring limit sleeve; 510. Return spring; 511. Positioning steel ball; 512. Hemispherical positioning groove; 513. Torsion spring shaft; 514. Anti-reverse pawl; 6. Lateral tensioning mechanism; 601. Base hinge block; 602. First-stage connecting rod; 603. Second-stage connecting rod; 604. Sliding connecting column; 7. Adaptive floating clamping mechanism; 701. Pressure sensing base; 702. Fixing plate; 703. Clamping drive cylinder; 704. Swinging clamping arm; 705. Anti-slip friction wheel; 706. Guide connecting column; 707. Outer limit plate; 708. Lower guide roller; 709. Upper pressure roller; 714. Pressure arm; 8. Protective shell. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] Please see Figure 1-7 One embodiment of the present invention is: a four-way elastic fabric tensile strength testing device, including a box body 1, a workbench panel 2 fixedly connected to the top of the box body 1, a control panel 3 provided on the top of the workbench panel 2, a bidirectional traction drive mechanism 4 provided inside the box body 1, a self-locking winding mechanism 5 provided on the top of the box body 1, a transverse stretching mechanism 6 provided on the top of the box body 1, and a protective shell 8 fixedly connected to the top of the workbench panel 2.

[0032] The bidirectional traction drive mechanism 4 includes a motor mounting base 401, which is fixedly connected to the bottom inner side of the housing 1. A drive motor 402 is fixedly connected to the top of the motor mounting base 401. A drive synchronous pulley 403 is fixedly connected to the output shaft of the drive motor 402. A support mounting plate 404 is fixedly connected to the bottom of the worktable panel 2. An adjustable tension wheel 405 is provided at the bottom of the support mounting plate 404. A lead screw 406 is rotatably connected through the top of the worktable panel 2. A driven synchronous pulley 407 is fixedly connected to one end of the lead screw 406. The drive synchronous pulley 407 and the drive synchronous pulley 407 are connected to the drive synchronous pulley 407. Driven synchronous pulley 407 is connected via synchronous belt 408. Guide column 409 is fixedly connected to the top of worktable panel 2. Screw 406 is threadedly connected to screw nut sleeve 410. Traction slider 411 is fixedly connected to the circumference of screw nut sleeve 410. A flip-up mounting bracket 412 is provided on the top of traction slider 411. Fabric winding roller 413 is rotatably connected through the side of mounting bracket 412. Bidirectional traction drive mechanism 4 is driven by drive motor 402, which drives screw 406 to rotate, thereby stably driving traction slider 411 to move up and down.

[0033] An adaptive floating clamping mechanism 7 is provided on the top of the workbench panel 2. The adaptive floating clamping mechanism 7 includes a pressure-sensing base 701, which is fixedly connected to the top of the workbench panel 2. A fixing plate 702 is fixedly connected to the top of the pressure-sensing base 701. A clamping drive cylinder 703 is fixedly connected to the bottom of the fixing plate 702. A swing clamping arm 704 is hinged to the top of the fixing plate 702. An anti-slip friction wheel 705 is fixedly connected to the end of the swing clamping arm 704 away from the fixing plate 702. A guide connecting post 70 is slidably connected through the side of the swing clamping arm 704. 6. One end of the guide connecting column 706 is fixedly connected to an outer limiting plate 707. A clamping arm 714 is hinged to the side of the outer limiting plate 707. A lower guide roller 708 is slidably connected to the side of the clamping arm 714. An upper clamping roller 709 is rotatably connected through the side of the clamping arm 714. The clamping arm 714 rotates around the hinge point under the action of the lower guide roller 708 contacting the fabric and being moved upward by the fabric. The upper clamping roller 709 moves downward accordingly and cooperates with the lower guide roller 708 to tightly clamp the fabric. The pressure sensing base 701 can sense the magnitude of the tension in real time and feed it back to the control system.

[0034] The circumferential surface of the lower guide roller 708 is located on the displacement trajectory of the piston rod end of the clamping drive cylinder 703. Two sets of swing clamping arms 704, anti-slip friction wheels 705 and guide connecting columns 706 are provided, and they are symmetrically distributed along the vertical central axis of the fixed plate 702. When the fabric is wrapped around the lower guide roller 708, the cylinder pneumatically presses the lower guide roller 708 to make it contact the upper pressing roller 709. Then, the anti-slip friction wheels 705, driven by the swing clamping arms 704, further press the fabric from both sides. At this time, the outer limit plate 707 of the pressing arm 714 rotates.

[0035] Two sets of adjustable tension pulleys 405 are provided and are symmetrically distributed along the vertical central axis of the drive motor 402. The circumferential surface of the adjustable tension pulleys 405 abuts against the surface of the synchronous belt 408 to ensure the stability and reliability of the transmission between the active synchronous belt pulley 403 and the driven synchronous belt pulley 407, and to avoid slippage and other phenomena that may affect the normal operation of the bidirectional traction drive mechanism 4.

[0036] The lead screw 406 is located inside the protective housing 8. The end of the lead screw 406 away from the driven synchronous pulley 407 is rotatably connected to the top of the protective housing 8 through a bearing. There are two sets of driven synchronous pulley 407, lead screw 406 and lead screw nut sleeve 410, and they are symmetrical to each other along the vertical central axis of the worktable panel 2, which effectively avoids the offset or shaking caused by uneven force on one side, and improves the stability and reliability of the detection device.

[0037] The self-locking winding mechanism 5 includes an outer mounting plate 501, which is fixedly connected to the side of the protective housing 8. A hemispherical protrusion 502 is fixedly connected to the side of the outer mounting plate 501. A transmission support plate 503 is fixedly connected to the top of the traction slider 411. A transmission shaft 504 is rotatably connected through the side of the transmission support plate 503. An end face grooved wheel 505 is fixedly connected to one end of the transmission shaft 504. A drive pinion 506 is fixedly connected to the end of the transmission shaft 504 away from the end face grooved wheel 505. A driven large gear 507 is fixedly connected to one end of the fabric winding roller 413. The top of the traction slider 411... A spring limiting sleeve 508 is fixedly connected to the part, and a return spring 509 is fixedly connected to the inner wall of the spring limiting sleeve 508. A positioning steel ball 510 is fixedly connected to the end of the return spring 509 away from the spring limiting sleeve 508. A hemispherical positioning groove 511 is opened on the side of the end face groove wheel 505. A torsion spring shaft 512 is fixedly connected to the side of the transmission support plate 503. An anti-reverse pawl 513 is provided on the circumferential surface of the torsion spring shaft 512. When the tensile force on the fabric approaches the maximum threshold set by the machine, the self-locking winding mechanism 5 is activated, thereby accelerating the tensile test process and enabling the fabric to respond quickly to changes in tensile force.

[0038] The size of the hemispherical protrusion 502 is matched with the size of the annular guide groove opened on the circumferential surface of the end face grooved wheel 505. Several hemispherical protrusions 502 are set and distributed in a linear array along the side of the outer mounting plate 501. The driving pinion 506 and the driven gear 507 mesh with each other. The number of teeth of the driving pinion 506 is less than the number of teeth of the driven gear 507, which ensures that the fabric winding roller 413 can provide stable and sufficient tension during the winding process, prevents the drive shaft 504 from reversing when subjected to reverse tension, and ensures the accuracy of the test results.

[0039] The circumferential surface of the positioning steel ball 510 rolls in contact with the inner wall of the hemispherical positioning groove 511. Several hemispherical positioning grooves 511 are provided and distributed in a circular array along the side of the end face groove wheel 505. The claw tip of the anti-reverse pawl 513 abuts against the tooth root of the driven large gear 507 to ensure that the fabric will not shrink back due to changes in tension during the winding process, thereby ensuring the stability and reliability of the test data.

[0040] In use, the operator first cuts the four-way stretch fabric to be tested to a suitable size, wraps one end of the fabric around the circumference of the lower guide roller 708, and then starts the cylinder via the control panel 3. The cylinder piston rod extends and presses against the lower guide roller 708, making it tightly contact the upper pressure roller 709. At this time, the fabric is initially clamped. The clamping drive cylinder 703 continues to act, and the swing clamping arm 704 drives the anti-slip friction wheel 705 to further press the fabric from both sides, ensuring that the fabric will not slip during the stretching process. The pressure arm 714 rotates around the hinge point under the action of the lower guide roller 708 contacting the fabric and being moved upward by the fabric. The upper pressure roller 709 moves downward accordingly, cooperating with the lower guide roller 708. The fabric is tightly clamped, forming a stable clamping point. The pressure-sensing base 701 senses the magnitude of the tension in real time and feeds the data back to the control system so that the operator can monitor the changes in tension during the stretching process. During the stretching process, the self-locking winding mechanism 5 also plays an important role. When the tension on the fabric approaches the maximum threshold set by the machine, the self-locking winding mechanism 5 is activated. The hemispherical protrusion 502 abuts against the inner groove of the end face grooved wheel 505, causing the end face grooved wheel 505 to rotate. The rotation of the end face grooved wheel 505 drives the transmission shaft 504 to rotate, and the drive pinion 506 on the transmission shaft 504 rotates accordingly. Because the drive pinion 506 and the driven large gear 505... The gears 506 and 507 mesh with each other, and the number of teeth on the driving pinion 506 is less than that on the driven gear 507. The driven gear 507 rotates at a slower speed, thereby driving the fabric winding roller 413 to stably wind the fabric, providing stable and sufficient tension. The return spring 509 inside the spring limit sleeve 508 pushes the positioning steel ball 510 into rolling contact with the hemispherical positioning groove 511 on the side of the end face grooved wheel 505, thus positioning and stabilizing the rotation of the end face grooved wheel 505 and preventing it from shaking and affecting transmission stability. Simultaneously, the tip of the anti-reverse pawl 513 tightly abuts against the tooth root of the driven gear 507, effectively preventing the drive shaft 504 from reversing when subjected to reverse tension, ensuring the fabric is wound smoothly. During the process, the fabric will not retract due to changes in tension, further ensuring the stability and reliability of the test data. As the traction slider 411 continues to move upward, the tension on the fabric gradually increases. When the tension reaches the set value or the fabric breaks, the control system receives the data fed back by the pressure sensing base 701 and immediately stops the operation of the bidirectional traction drive mechanism 4. The operator can view the test data through the control panel 3, including the maximum tension and tensile length, in order to evaluate the tensile strength of the four-way elastic fabric. After the test is completed, the operator can control the cylinder piston rod to retract through the control panel 3, release the clamp on the fabric, remove the tested fabric from the device, and clean the residue on the device.

[0041] Please see Figure 1-7Based on the above embodiments, in another embodiment of the present invention, the transverse stretching mechanism 6 includes a base hinge block 601, which is fixedly connected to the top of the workbench panel 2. A first-stage connecting rod 602 is hinged to the top of the base hinge block 601. A second-stage connecting rod 603 is hinged to the end of the first-stage connecting rod 602 away from the base hinge block 601. The end of the second-stage connecting rod 603 away from the first-stage connecting rod 602 is fixedly connected to the side of the traction slider 411 through a sliding connecting column 604. The transverse stretching mechanism 6 can smoothly convert longitudinal movement into transverse stretching force, making the test more diverse, realizing transverse stretching of four-way elastic fabric, and meeting different testing requirements.

[0042] The circumferential surface of the sliding connecting column 604 penetrates and slides through the side of the protective shell 8. A set of adaptive floating clamping mechanisms 7 is installed at the end of the first-stage connecting rod 602 away from the base hinge block 601, which can firmly clamp the fabric from both sides to prevent the fabric from slipping during lateral stretching and ensure the accuracy of the lateral stretching test.

[0043] There are three sets of adaptive floating clamping mechanisms 7. One set is fixedly installed on the top of the worktable panel 2, and the other two sets are respectively installed on the ends of the two first-stage connecting rods 602 away from the base hinge block 601, which realizes the stability of the fabric clamping during testing in various directions.

[0044] When performing a lateral tensile test on a four-way stretch fabric, the operator first cuts the fabric to be tested to a suitable size and fixes one end to the adaptive floating clamping mechanism 7 on the top of the workbench panel 2. The operator then activates the bidirectional traction drive mechanism 4 via the control panel 3. The traction slider 411 moves upward under the drive of the lead screw 406, causing the sliding connecting column 604 to move upward synchronously. At this time, the second-stage connecting rod 603 and the first-stage connecting rod 602 are linked, converting the longitudinal displacement into lateral tensile force. This causes the two ends of the fabric to extend to both sides under the action of the adaptive floating clamping mechanisms 7 at the ends of the two sets of first-stage connecting rods 602. The pressure-sensing base 701 monitors the lateral tensile force data in real time. When the tensile force reaches the set value or the fabric breaks, the control system immediately stops the drive motor 402. The operator can read parameters such as the maximum lateral tensile force and deformation through the control panel 3.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the tensile strength of four-way stretch fabric, comprising a housing (1), characterized in that: The top of the box (1) is fixedly connected to a workbench panel (2), the top of the workbench panel (2) is provided with a control panel (3), the inside of the box (1) is provided with a bidirectional traction drive mechanism (4), the top of the box (1) is provided with a self-locking winding mechanism (5), the top of the box (1) is provided with a transverse stretching mechanism (6), and the top of the workbench panel (2) is fixedly connected to a protective shell (8). The bidirectional traction drive mechanism (4) includes a motor mounting base (401), which is fixedly connected to the bottom inner side of the housing (1). A drive motor (402) is fixedly connected to the top of the motor mounting base (401). An active synchronous pulley (403) is fixedly connected to the output shaft of the drive motor (402). A support mounting plate (404) is fixedly connected to the bottom of the worktable panel (2). An adjustable tension wheel (405) is provided at the bottom of the support mounting plate (404). A lead screw (406) is rotatably connected through the top of the worktable panel (2). One end of the drive synchronous pulley (407) is fixedly connected to the driven synchronous pulley (407). The drive synchronous pulley (403) and the driven synchronous pulley (407) are connected by a synchronous belt (408). The top of the worktable panel (2) is fixedly connected to a guide column (409). The circumferential surface of the lead screw (406) is threaded with a lead screw nut sleeve (410). The circumferential surface of the lead screw nut sleeve (410) is fixedly connected to a traction slider (411). The top of the traction slider (411) is provided with a flip-up mounting bracket (412). The side of the mounting bracket (412) is rotatably connected to a fabric winding roller (413). An adaptive floating clamping mechanism (7) is provided on the top of the workbench panel (2). The adaptive floating clamping mechanism (7) includes a pressure sensing base (701), which is fixedly connected to the top of the workbench panel (2). A fixing plate (702) is fixedly connected to the top of the pressure sensing base (701). A clamping drive cylinder (703) is fixedly connected to the bottom of the fixing plate (702). A swing clamping arm (704) is hinged to the top of the fixing plate (702). 04) An anti-slip friction wheel (705) is fixedly connected to one end away from the fixed plate (702). A guide connecting column (706) is slidably connected through the side of the swing clamping arm (704). An outer limiting plate (707) is fixedly connected to one end of the guide connecting column (706). A pressing arm (714) is hinged to the side of the outer limiting plate (707). A lower guide roller (708) is slidably connected to the side of the pressing arm (714). An upper pressing roller (709) is rotatably connected through the side of the pressing arm (714).

2. The device for testing the tensile strength of four-way elastic fabric according to claim 1, characterized in that: The circumferential surface of the lower guide roller (708) is located on the displacement trajectory of the piston rod end of the clamping drive cylinder (703). The number of the swing clamping arm (704), the anti-slip friction wheel (705) and the guide connecting column (706) are all provided in two sets, and they are symmetrically distributed along the vertical central axis of the fixed plate (702).

3. The device for testing the tensile strength of four-way elastic fabric according to claim 2, characterized in that: The adjustable tensioning pulleys (405) are provided in two sets and are symmetrically distributed along the vertical central axis of the drive motor (402). The circumferential surface of the adjustable tensioning pulleys (405) abuts against the surface of the synchronous belt (408).

4. The device for testing the tensile strength of four-way stretch fabric according to claim 3, characterized in that: The lead screw (406) is located inside the protective housing (8). The end of the lead screw (406) away from the driven synchronous pulley (407) is rotatably connected to the top of the protective housing (8) through a bearing. There are two sets of driven synchronous pulley (407), lead screw (406) and lead screw nut sleeve (410), and they are symmetrical to each other along the vertical central axis of the worktable panel (2).

5. The device for testing the tensile strength of four-way stretch fabric according to claim 4, characterized in that: The self-locking winding mechanism (5) includes an outer mounting plate (501), which is fixedly connected to the side of the protective shell (8). A hemispherical protrusion (502) is fixedly connected to the side of the outer mounting plate (501). A transmission support plate (503) is fixedly connected to the top of the traction slider (411). A transmission shaft (504) is rotatably connected through the side of the transmission support plate (503). An end face groove wheel (505) is fixedly connected to one end of the transmission shaft (504). A drive pinion (506) is fixedly connected to the end of the transmission shaft (504) away from the end face groove wheel (505). The fabric One end of the winding roller (413) is fixedly connected to a driven large gear (507), the top of the traction slider (411) is fixedly connected to a spring limiting sleeve (508), the inner wall of the spring limiting sleeve (508) is fixedly connected to a return spring (509), the end of the return spring (509) away from the spring limiting sleeve (508) is fixedly connected to a positioning steel ball (510), the side of the end face groove wheel (505) is provided with a hemispherical positioning groove (511), the side of the transmission support plate (503) is fixedly connected to a torsion spring shaft (512), and the circumferential surface of the torsion spring shaft (512) is provided with an anti-reverse ratchet (513).

6. The device for testing the tensile strength of four-way stretch fabric according to claim 5, characterized in that: The size of the hemispherical protrusion (502) is adapted to the size of the annular guide groove opened on the circumferential surface of the end face groove wheel (505). The number of hemispherical protrusions (502) is set to a certain number and is distributed in a linear array along the side of the outer mounting plate (501). The driving pinion (506) meshes with the driven gear (507). The number of teeth of the driving pinion (506) is less than the number of teeth of the driven gear (507).

7. The device for testing the tensile strength of four-way stretch fabric according to claim 6, characterized in that: The circumferential surface of the positioning steel ball (510) rolls in contact with the inner wall of the hemispherical positioning groove (511). The hemispherical positioning groove (511) is provided in several ways and is distributed in a circular array along the side of the end face groove wheel (505). The claw tip of the anti-reverse pawl (513) abuts against the tooth root of the driven large gear (507).

8. The device for testing the tensile strength of four-way stretch fabric according to claim 7, characterized in that: The transverse stretching mechanism (6) includes a base hinge block (601), which is fixedly connected to the top of the workbench panel (2). A first-stage connecting rod (602) is hinged to the top of the base hinge block (601). A second-stage connecting rod (603) is hinged to the end of the first-stage connecting rod (602) away from the base hinge block (601). The end of the second-stage connecting rod (603) away from the first-stage connecting rod (602) is fixedly connected to the side of the traction slider (411) through a sliding connecting column (604).

9. The device for testing the tensile strength of four-way stretch fabric according to claim 8, characterized in that: The circumferential surface of the sliding connecting column (604) penetrates and is slidably connected to the side of the protective shell (8). A set of the adaptive floating clamping mechanism (7) is installed at the end of the first-stage connecting rod (602) away from the base hinge block (601).

10. A device for testing the tensile strength of four-way stretch fabric according to claim 9, characterized in that: There are three sets of the adaptive floating clamping mechanism (7), one set is fixedly set on the top of the worktable panel (2), and the other two sets are respectively set on the ends of the two first-stage connecting rods (602) away from the base hinge block (601).

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