Zipper fatigue resistance test device

Abstract

The present invention discloses a zipper fatigue resistance testing device, comprising a base and a mounting plate arranged on the base, wherein the upper and lower ends of the mounting plate are respectively provided with an upper clamp and a lower clamp for fixing the two ends of the zipper, a through groove is opened on the mounting plate between the upper clamp and the lower clamp, and slideways are symmetrically provided on the plate wall of the mounting plate on both sides of the through groove, a reciprocating mechanism is provided on the mounting plate and the slideway, and a clamping assembly for laterally fixing the zipper is longitudinally arranged on the adjacent side of the slideway; the present invention has a simple structure and a reasonable design, and realizes that during the pulling process of the zipper head, the entire section of the zipper can be subjected to the effect of lateral pulling, and the uniformity of the pulling force is significantly improved compared with the traditional fatigue resistance testing machine. Compared with the traditional equipment, the integrity, accuracy and reliability of the experimental results are higher, and the pulling force can be adjusted by adjusting the current on the electromagnetic block, so the practicality is also improved.

Description

Technical Field

[0001] The invention relates to the technical field of zipper detection equipment, in particular to a zipper fatigue resistance testing device. Background Art

[0002] With the rapid development of the textile industry and clothing accessories, zippers, as indispensable connectors in daily life, have become a focus of attention for both consumers and manufacturers regarding their quality and durability. Fatigue resistance is a key quality indicator, directly impacting the zipper's reliability and lifespan during use. Therefore, fatigue testing of zippers to evaluate their performance under repeated opening and closing is crucial for ensuring product quality and improving customer satisfaction.

[0003] The traditional device has the following shortcomings:

[0004] Currently, there are a variety of zipper reciprocating fatigue testing machines on the market. These devices primarily use upper and lower clamps to secure the zipper, then reciprocate the zipper head to simulate the opening and closing motion of the zipper in actual use to test its fatigue resistance. However, existing zipper reciprocating fatigue testing machines still have certain limitations in design and functionality. Specifically, these devices typically require lateral clamps to secure the zipper's sides. During the test, weights or tension springs are used to apply a constant lateral tension to the zipper to simulate the lateral pull it experiences during opening and closing. However, due to the limitations of the weights or tension springs, existing devices can only apply lateral tension to a single point on the zipper's side through the lateral clamps, and cannot apply lateral tension to the entire zipper. This uneven force distribution results in uneven force distribution on the zipper during the test, ensuring accurate test results only for the pulled area, while the accuracy of test results for other areas cannot be guaranteed. Therefore, existing zipper fatigue testing equipment is no longer able to meet the actual needs of enterprises. Summary of the Invention

[0005] The purpose of the present invention is to provide a zipper fatigue resistance testing device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a zipper fatigue resistance test device, comprising a base and a mounting plate disposed on the base, wherein upper and lower ends of the mounting plate are respectively provided with an upper clamp and a lower clamp for fixing the two ends of the zipper, a through slot is defined on the mounting plate between the upper clamp and the lower clamp, slideways are symmetrically disposed on the plate wall of the mounting plate on both sides of the through slot, a reciprocating mechanism is disposed on the mounting plate and the slideways, and a clamping assembly for laterally fixing the zipper is longitudinally arranged on one side adjacent to the slideway;

[0007] The reciprocating mechanism includes:

[0008] a first motor, the first motor being arranged on the back side of the mounting plate at the upper end of the through slot, the back side of the mounting plate being rotatably connected to a lead screw, one end of the lead screw being connected to the output end of the first motor, a lifting frame being threadedly connected to the lead screw, and a clamping claw being provided on one side of the lifting frame passing through the through slot for clamping the zipper head;

[0009] A lifting slot is provided on the slideway, wherein a guide block is slidably connected to the lifting slot, and guide slots are provided on both sides of the mounting plate to improve the stability of the lifting frame, and the two ends of the lifting frame pass through the guide slots and are connected to the ends of the guide blocks;

[0010] The electromagnetic block is arranged at one end of the guide block away from the lifting frame, and the clamping part of the clamping assembly is provided with a permanent magnet block matching the electromagnetic block.

[0011] Preferably, the clamping assembly includes:

[0012] Horizontal slots, the horizontal slots are longitudinally spaced apart and located on both sides of the lifting slot on the slideway, and positioning frames are movably arranged in the horizontal slots, the positioning frames are arranged on the side adjacent to the slideway, and the ends of the positioning frames are slidably connected to the horizontal slots via sliders;

[0013] A fixed splint, the fixed splint being fixedly arranged on one side of the interior of the positioning frame, a movable splint being rotatably connected to the longitudinal axis of the positioning frame, a compression spring being movably arranged between the fixed splint and the movable splint, a pressure rod being arranged on the outer wall of the movable splint, the end of the pressure rod passing through the hole on the positioning frame and being located on the outer side of the positioning frame;

[0014] A transmission shaft, the transmission shaft being rotatably connected to the mounting hole on the mounting plate, the number of the transmission shafts being four, and a ball screw being provided at the end of the transmission shaft;

[0015] A pressure strip, the pressure strip being longitudinally arranged on the outside of the pressure rod and having an end portion threadedly connected to the ball screw;

[0016] Two second motors, the two second motors are arranged on the back side of the mounting plate and the output ends of the two second motors are respectively connected to the ends of the two transmission shafts above. The ends of the transmission shafts are also connected to the upper and lower ends of the transmission shafts to ensure the synchronous rotation of the upper and lower ball screws on each side;

[0017] A locking mechanism is provided on the mounting plate for improving the clamping effect of the fixed clamping plate and the movable clamping plate.

[0018] Preferably, the locking mechanism includes:

[0019] A positioning rod, the positioning rod being arranged on the wall of the mounting plate, the end of the positioning rod being slidably connected to a locking rod, the locking rod being located on one side of the transmission shaft and longitudinally passing between the fixed clamping plate and the movable clamping plate;

[0020] A lock plate is provided on the lock rod and is spaced apart from the movable clamping plate and the fixed clamping plate. A lock groove matching the lock plate is provided above the movable clamping plate and the fixed clamping plate.

[0021] The gear is provided on the shaft wall at one end of the transmission shaft, and tooth grooves matching the gear are provided at both ends of the locking rod. A limit plate is provided at the lower end of the locking rod, and a top spring is provided on the lever arm at the lower end of the locking rod below the limit plate.

[0022] Preferably, a pressing groove matching the pressing rod is provided on the inner side of the pressing strip, and a gap is left between the inner wall of the pressing groove and the end of the pressing rod.

[0023] Preferably, the length of the tooth socket is 3-5 cm.

[0024] Preferably, a support block is provided on the wall of the mounting plate and located inside the positioning frame.

[0025] Preferably, the ends of the fixed clamping plate and the movable clamping plate are respectively provided with a conical protrusion and a conical groove for improving the clamping effect of the zipper.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention is provided with a reciprocating mechanism. When the zipper head is pulled up and down, the electromagnetic block always moves up and down synchronously, generating a certain attraction to the permanent magnet block at the corresponding position. The clamping part is used to simulate the attraction of the permanent magnet block as the lateral tension encountered during the actual operation of the zipper. As a result, the entire section of the zipper can be subjected to lateral pulling during the pulling process of the zipper head. The uniformity of the pulling force is also significantly improved compared with traditional fatigue testing machines. Compared with traditional equipment, the completeness, accuracy and reliability of the experimental results are higher. In addition, the pulling force can be adjusted by adjusting the current on the electromagnetic block. The operation is simple, and more application scenarios can be simulated. The practicality is also improved, which is more in line with the actual use needs of current enterprises.

[0028] 2. By providing a clamping assembly, the present invention allows all movable clamps to be uniformly controlled and rapidly opened or closed by two second motors, achieving the effect of rapidly clamping and removing the entire side section of the zipper. The operation is convenient, and the ends of each positioning frame can slide freely and independently along the horizontal groove. After the zipper at any position is opened, it can rebound promptly to provide feedback without interfering with each other, further ensuring the accuracy and reliability of the experimental results.

[0029] 3. The present invention is provided with a locking mechanism, which realizes the timely locking and unlocking of the fixed clamping plate and the movable clamping plate when they are opened and closed, thereby ensuring the clamping effect of the zipper side, improving the stability during the test, and not affecting the clamping efficiency of the zipper. At the same time, the transmission shafts of the two second motors are used as the power source to ensure the synchronization of the drive, simplify the overall structure, and reduce the subsequent maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall forward perspective schematic diagram of the present invention;

[0031] Figure 2 It is the overall front view of the present invention;

[0032] Figure 3 It is a schematic back-view perspective view of the entire invention;

[0033] Figure 4 It is an overall rear view of the present invention;

[0034] Figure 5 is a three-dimensional schematic diagram of a clamping portion in a clamping assembly of the present invention;

[0035] Figure 6 It is a schematic top view of the internal structure of the present invention;

[0036] Figure 7 For the present invention Figure 6 A magnified schematic diagram at point A;

[0037] Figure 8 It is a side view schematic diagram of the internal structure of the present invention;

[0038] Figure 9 For the present invention Figure 8 An enlarged schematic diagram at B in FIG.

[0039] Figure 10 For the present invention Figure 8 The enlarged schematic diagram at C in FIG.

[0040] Figure 11 This is a schematic diagram of the opening of the movable splint of the present invention.

[0041] In the figure: 1. Base; 2. Mounting plate; 3. Upper fixture; 4. Lower fixture; 5. Through slot; 6. Slideway; 7. Reciprocating mechanism; 701. First motor; 702. Lead screw; 703. Lifting frame; 704. Clamping claw; 705. Lifting slot; 706. Guide block; 707. Guide slot; 708. Electromagnetic block; 709. Permanent magnet; 8. Clamping assembly; 801. Horizontal slot; 802. Positioning frame; 8021. Support block. 803, fixed splint; 804, movable splint; 805, compression spring; 806, compression rod; 807, transmission shaft; 808, ball screw; 809, pressure strip; 8091, pressure groove; 810, two second motors; 811, synchronous belt; 9, locking mechanism; 901, positioning rod; 902, locking rod; 903, locking disk; 904, locking groove; 905, gear; 906, tooth groove; 907, limit plate; 908, top spring. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0043] It should be noted that when an element is referred to as being "fixed," "mounted," "connected," or "disposed" with another element, it may be directly on the other element or indirectly on the other element. It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," and the like, indicating positions or location relationships, are based on the positions or location relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation as described in the specification. Therefore, they should not be understood as limiting the present invention.

[0044] As a further refinement of the present invention, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0045] See also Figure 1-11As shown, the present invention provides a technical solution for a zipper fatigue resistance test device: a zipper fatigue resistance test device, comprising a base 1 and a mounting plate 2 fixedly mounted on the base 1, wherein an upper clamp 3 and a lower clamp 4 for fixing the two ends of the zipper are respectively mounted on the upper and lower ends of the mounting plate 2, wherein the upper clamp 3 is mounted on the mounting plate 2 through a slot and can slide up and down to adapt to zippers of different lengths, a through slot 5 is opened on the mounting plate 2 between the upper clamp 3 and the lower clamp 4, slideways 6 are symmetrically mounted on the wall of the mounting plate 2 on both sides of the through slot 5, a reciprocating mechanism 7 is mounted on the mounting plate 2 and the slideway 6, a clamping assembly 8 for laterally fixing the zipper is longitudinally arranged on one side adjacent to the slideway 6, and the clamping assembly 8 performs uniform longitudinal clamping on both sides of the zipper through a plurality of clamping parts;

[0046] The reciprocating mechanism 7 includes a first motor 701, a lifting slot 705, and an electromagnetic block 708. The first motor 701 is mounted on the back side of the mounting plate 2, located at the upper end of the through slot 5, via a bracket. A screw 702 is rotatably connected to the back side of the mounting plate 2 via a mounting platform. One end of the screw 702 is connected to the output end of the first motor 701. A lifting frame 703 is threadedly connected to the screw 702. One side of the lifting frame 703 passes through the through slot 5 and is equipped with a clamping claw 704 for clamping the zipper head. When the screw 702 rotates, the clamping claw 704 drives the zipper head up and down. A lifting groove 705 extends through the slideway 6. A guide block 706 is slidably connected within the lifting groove 705. Ball bearings are provided on both sides of the guide block 706 to reduce friction during sliding. Guide grooves 707 are provided on both sides of the mounting plate 2 to enhance the stability of the lifting frame 703. The ends of the lifting frame 703 pass through the guide grooves 707 and connect to the ends of the guide blocks 706. Sliders can be provided on the inside of the guide grooves 707 to slidably connect with the guide grooves 707 to further enhance the stability of the lifting frame 703 as it slides up and down. An electromagnetic block 708 is fixedly mounted on the end of the guide block 706 away from the lifting frame 703. A permanent magnet 709 is mounted on one end of the clamping assembly 8, matching the electromagnetic block 708. There are multiple permanent magnets 709 mounted on one side of the clamping portion.

[0047] When a zipper needs to be fatigue tested, the position between the upper and lower clamps 3 and 4 and the initial height of the lifting frame 703 are first adjusted longitudinally according to the length of the zipper to be tested. The zipper is then secured between the upper and lower clamps 3 and 4, with the zipper head gripped by the clamping claws 704. The locking mechanism 9 and clamping assembly 8 are then opened, and the two sides of the zipper are evenly fixed longitudinally by the clamping portion of the clamping assembly 8. The fatigue test can then be performed. The PLC controller activates the first motor 701 and energizes the electromagnetic block 708. The first motor 701 rotates the lead screw 702, thereby driving the lifting frame 703 to move longitudinally on the lead screw 702. The guide block 706, driven by the lifting frame 703, also drives the electromagnetic block 708 to slide longitudinally along the lifting slot 705. The clamping claws 704 drive the zipper head downward to close the zipper, and upward to open it. As the electromagnetic block 708 slides, it generates an attractive force on the permanent magnet block 709 on the corresponding clamping portion, thereby pulling on the side of the zipper. The magnitude of this attractive force is adjusted by controlling the current. In other words, the longitudinal sliding of the electromagnetic block 708 and the longitudinal movement of the zipper head are synchronized. When the zipper is opened or closed to any position, the electromagnetic block 708 will also synchronously generate a certain lateral pulling force on the zipper at that position through the permanent magnet block 709 and the clamping portion. When the zipper head is pulled to the end, the PLC controller controls the change in the direction of the first motor 701, achieving the up and down reciprocating movement of the zipper head for fatigue resistance testing.

[0048] In actual operation, the height of the clamping claw 704 is designed to be adjustable, and the lateral pulling force can be applied to the zipper head or above the zipper head.

[0049] Through the reciprocating mechanism 7, in the process of pulling the zipper head up and down, the electromagnetic block 708 always moves up and down synchronously, generating a certain attraction to the permanent magnet block 709 at the corresponding position, and the clamping part is used to simulate the attraction exerted on the permanent magnet block 709 as the lateral tension encountered in the actual working process of the zipper, so that the entire section of the zipper can be subjected to the effect of lateral pulling during the pulling process of the zipper head. The uniformity of the tension is also significantly improved compared with the traditional fatigue testing machine. Compared with traditional equipment, the completeness, accuracy and reliability of the experimental results are higher, and the tension can be adjusted by adjusting the current passing through the electromagnetic block 708. The operation is simple, more application scenarios can be simulated, and the practicality has also been improved, which is more in line with the actual use needs of current enterprises.

[0050] The clamping assembly 8 includes a horizontal slot 801, a fixed clamping plate 803, a transmission shaft 807, a pressure strip 809, two second motors 810, and a locking mechanism 9. The horizontal slots 801 are longitudinally spaced apart on the slideway 6, located on either side of the lifting slot 705. Positioning frames 802 are movably mounted within the horizontal slots 801. The positioning frames 802 are arranged on adjacent sides of the slideway 6 and are installed opposite each other. The ends of the positioning frames 802 are slidably connected to the horizontal slots 801 via sliders. The permanent magnet 709 is disposed on one side of the positioning frames 802. The fixed plate 803 is fixedly mounted on one side of the interior of the positioning frame 802. A movable plate 804 is rotatably connected to the longitudinal axis of the positioning frame 802. A compression spring 805 is movably installed between the fixed plate 803 and the movable plate 804. The elastic force of the compression spring 805 ensures the clamping of the ends of the fixed plate 803 and the movable plate 804. A pressure rod 806 is mounted on the outer wall of the movable plate 804. The end of the pressure rod 806 passes through a hole in the positioning frame 802 and is located outside the positioning frame 802. A transmission shaft 807 is rotatably connected to the mounting hole in the mounting plate 2. There are four transmission shafts 807, and the ends of the transmission shafts 807 are provided with ball screws 808. A pressure strip 809 is longitudinally mounted on the outside of the pressure rod 806 and the end is threadedly connected to the ball screw 808. The horizontal displacement of the pressure strip 809 is controlled by the synchronous rotation of the upper and lower ball screws 808. Two second motors 810 are mounted on the back side of mounting plate 2 via brackets. The output ends of the two second motors 810 are connected to the ends of the two upper transmission shafts 807. The ends of the transmission shafts 807 are also connected to the upper and lower ends of the transmission shafts 807 to ensure the synchronous rotation of the upper and lower ball screws 808 on each side. The locking mechanism 9 is mounted on mounting plate 2 to enhance the clamping effect of the fixed clamping plate 803 and the movable clamping plate 804.

[0051] A plurality of positioning frames 802 , fixed clamping plates 803 , movable clamping plates 804 and compression springs 805 respectively constitute the clamping parts of the clamping assembly 8 and are oppositely mounted on the slideway 6 .

[0052] When it is necessary to open the clamping assembly 8 to evenly clamp the zipper's side, the locking mechanism 9 is first unlocked. The PLC controller then synchronously activates the two second motors 810. Driven by the timing belt 811, the two second motors 810 drive the four transmission shafts 807 and the ball screw 808 to rotate synchronously, thereby driving the pressure strip 809 toward the mounting plate 2. As the pressure strip 809 moves, the compression rod 806 is squeezed, overcoming the elastic force of the compression spring 805 and driving the movable clamping plate 804 to rotate along the longitudinal axis of the positioning frame 802. At this point, the ends of the movable clamping plate 804 and the fixed clamping plate 803 are opened, allowing the zipper's side to be inserted. When the sides of the zipper are located between the ends of the movable clamp 804 and the fixed clamp 803 and the two ends are effectively fixed by the upper clamp 3 and the lower clamp 4, the PLC controller can control the two second motors 810 to reverse. Similarly, the pressure strip 809 will move in the direction away from the mounting plate 2. Under the action of the compression spring 805, the fixed clamp 803 is reset and the end clamps the side of the zipper to be tested.

[0053] When the energized electromagnetic block 708 slides to one side of a permanent magnet block 709, it will generate pulling force on the clamping part where the permanent magnet block 709 is located, that is, the corresponding positioning frame 802, fixed clamping plate 803 and movable clamping plate 804, thereby pulling the corresponding position of the zipper side.

[0054] If the zipper is pulled apart by the magnetic force of the electromagnetic block 708 during the reciprocating fatigue test, the force balance of the positioning frame 802 where the permanent magnet block 709 is located is broken. Under the attraction of the electromagnetic block 708, the internal fixed clamping plate 803, the movable clamping plate 804, and the side of the zipper move horizontally along the horizontal groove 801, causing the zipper to be pulled apart, resulting in a failed test result. The mounting plate 2 is usually equipped with an optical coupler in conjunction with a PLC controller to detect the horizontal displacement of the components.

[0055] Through the clamping assembly 8, all the movable clamps 804 can be uniformly controlled and driven to open or close quickly by two second motors 810, thereby achieving the effect of quickly clamping and removing the entire side section of the zipper. The operation is convenient, and the end of each positioning frame 802 can slide freely and independently along the horizontal groove 801. After the zipper at any position is opened, it can rebound in time to provide feedback, and there will be no interference between each other, further ensuring the accuracy and reliability of the experimental results.

[0056] The locking mechanism 9 includes a positioning rod 901, a locking plate 903, and a gear 905. The positioning rod 901 is mounted on the wall of the mounting plate 2. The end of the positioning rod 901 is slidably connected to the locking rod 902 through a sliding groove. Notches are provided on both sides of the locking rod 902 to match the positioning rod 901 to prevent it from slipping during the lifting process. The locking rod 902 is located on one side of the transmission shaft 807. Figure 11As shown, the locking rod 902 passes between the fixed clamping plate 803 and the movable clamping plate 804. Even if the movable clamping plate 804 is in the open state, the locking rod 902 will not interfere with the movable clamping plate 804. The locking plate 903 is fixedly mounted on the locking rod 902 and spaced apart from the movable clamping plate 804 and the fixed clamping plate 803. A locking groove 904 that matches the locking disc 903 is provided above the movable clamping plate 804 and the fixed clamping plate 803. The locking groove 904 is a strip-shaped groove. When the locking disc 903 falls into the locking groove 904, it can not only restrict the closing of the movable clamping plate 804, but also will not affect the horizontal movement of the fixed clamping plate 803 and the movable clamping plate 804 relative to the locking groove 904. Gear 905 is provided on the shaft wall at one end of the transmission shaft 807. Both ends of the locking rod 902 are provided with tooth grooves 906 that match the gear 905. A limit plate 907 is installed at the lower end of the locking rod 902. A top spring 908 is sleeved on the lever arm at the lower end of the locking rod 902, located below the limit plate 907. The top spring 908 always applies an upward thrust to the locking rod 902 through the limit plate 907, ensuring that even if the locking rod 902 is at the lowest point and the gear 905 is no longer able to output power because it is already at the upper end of the tooth groove 906, the upper part of the tooth groove 906 can still maintain a meshing connection with the gear 905. Later, the meshing of the gear 905 and the tooth groove 906 can drive the locking rod 902 to move upward.

[0057] When it is necessary to open the movable splint 804, the two second motors 810 will start to provide power output. After the two second motors 810 are started, the transmission shaft 807 will drive the gear 905 to rotate, and the gear 905 will drive the locking rod 902 to move upward by engaging with the tooth groove 906 until the lock disk 903 is completely separated from the lock groove 904, and the tooth groove 906 is located above the gear 905. The gear 905 starts to idle. At this time, the movable splint 804 is in an unlocked state, and then the pressure strip 809 will contact the pressure rod 806 to open the movable splint 804. In order to ensure that the locking disc 903 has left the locking groove 904 and does not interfere with the movable clamping plate 804 during rotation, that is, the locking disc 903 needs to be separated from the locking groove 904 before the pressure strip 809 and the pressure rod 806 come into contact. Therefore, a pressure groove 8091 is formed on the inner side of the pressure strip 809 to match the pressure rod 806. The pressure groove 8091 is controlled in depth so that a gap is left between the inner wall and the end of the pressure rod 806. In other words, when the gear 905 drives the locking rod 902 to move upward, the pressure strip 809 is only located in the pressure groove 8091 and has not yet come into contact with the pressure rod 806 until the locking disc 903 leaves the locking groove 904.

[0058] When the movable splint 804 needs to be closed and the side of the zipper needs to be clamped, the two second motors 810 are started to reverse. Since the tooth groove 906 is always engaged with the gear 905 under the action of the gravity of the lock rod 902, it can be driven directly. At the same time, the movable splint 804 opens, the lock disk 903 gradually falls into the lock groove 904, the tooth groove 906 moves to the bottom of the gear 905, and the gear 905 starts to idle. In order to prevent the lock disk 903 from falling into place prematurely and colliding with the movable splint 804 when the movable splint 804 is not fully opened, the tooth groove 906 can be lengthened to increase the lifting stroke, reserving time for the movable splint 804 to fully open.

[0059] Through the locking mechanism 9, the fixed clamping plate 803 and the movable clamping plate 804 are synchronously locked and unlocked in a timely manner when they are opened and closed, ensuring the clamping effect of the zipper side, improving the stability during the test, and not affecting the clamping efficiency of the zipper. At the same time, the transmission shafts 807 of the two second motors 810 are used as the power source to ensure the synchronization of the drive, simplify the overall structure, and reduce the subsequent maintenance costs.

[0060] The length of the tooth groove 906 is 3-5 cm, which is the optimal gap of the positioning frame 802. The tooth groove 906 uses its own length to limit the up and down movement of the locking disk 903 to 3-5 cm, which can effectively prevent the locking disk 903 from colliding with the positioning frame 802 above during movement.

[0061] A support block 8021 is installed on the wall of the mounting plate 2 on the inner side of the positioning frame 802 . When the pressure strip 809 presses the pressure rod 806 , the support block 8021 can provide sufficient lateral support for the mounting plate 2 .

[0062] The ends of the fixed clamping plate 803 and the movable clamping plate 804 are respectively provided with a conical protrusion and a conical groove for improving the clamping effect of the zipper.

[0063] Working Principle: When a zipper fatigue test is required, the position between the upper and lower clamps 3 and 4 and the initial height of the lifting frame 703 are first adjusted longitudinally according to the length of the zipper to be tested. The zipper is then secured between the upper and lower clamps 3 and 4, with the zipper head gripped by the clamping claws 704. The PLC controller then synchronously activates the two second motors 810. Driven by the timing belt 811, the two second motors 810 drive the four drive shafts 807 and ball screw 808 to rotate synchronously, thereby driving the pressure strip 809 toward the mounting plate 2. Simultaneously, the gear 905, meshing with the tooth groove 906, drives the locking rod 902 upward until the lock plate 903 is completely separated from the locking groove 904, with the tooth groove 906 positioned above the gear 905. The gear 905 then begins to idle, unlocking the movable clamp 804. The pressure strip 809 then engages the pressure rod 806 to open the movable clamp 804. At this point, the side of the zipper to be tested can be placed in, and then the two second motors 810 are started to reverse. Since the tooth groove 906 is always engaged with the gear 905 under the action of gravity of the locking rod 902, it can be driven directly. At the same time, the pressure strip 809 will move in a direction away from the mounting plate 2, the movable clamping plate 804 will open, the locking disk 903 will gradually fall into the locking groove 904, the tooth groove 906 will move to the bottom of the gear 905, and the gear 905 will begin to idle. At this time, the fixed clamping plate 803 and the movable clamping plate 804 are locked, and the fatigue test can be carried out. The PLC controller controls the start of the first motor 701 and energizes the electromagnetic block 708. The first motor 701 drives the screw 702 to rotate, thereby driving the lifting frame 703 to move longitudinally on the screw 702. Under the action of the lifting frame 703, the guide block 706 also drives the electromagnetic block 708 to slide longitudinally along the lifting groove 705. During the sliding process, the electromagnetic block 708 will generate an attractive force on the permanent magnet block 709 on the corresponding clamping part, thereby pulling the side of the zipper. The magnitude of the attractive force is adjusted by controlling the magnitude of the current. When the zipper head is pulled to the end, the PLC controller controls the change of the direction of the first motor 701 to achieve the up and down reciprocating movement of the zipper head and perform a fatigue test. If the zipper is pulled open by the magnetic force of the electromagnetic block 708 during the reciprocating fatigue test, the corresponding positioning frame 802 where the permanent magnet block 709 is located will be broken due to the balance of force. Under the attraction of the electromagnetic block 708, the internal fixed clamping plate 803, the movable clamping plate 804 and the side of the zipper will move horizontally along the horizontal groove 801. If the zipper is pulled open, the test result is unqualified.

[0064] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0065] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A zipper fatigue resistance test device, comprising a base (1) and a mounting plate (2) arranged on the base (1), wherein upper and lower ends of the mounting plate (2) are respectively provided with an upper clamp (3) and a lower clamp (4) for fixing the two ends of the zipper, characterized in that: A through slot (5) is provided on the mounting plate (2) between the upper clamp (3) and the lower clamp (4); slideways (6) are symmetrically provided on the wall of the mounting plate (2) on both sides of the through slot (5); a reciprocating mechanism (7) is provided on the mounting plate (2) and the slideways (6); and a clamping assembly (8) for laterally fixing the zipper is longitudinally arranged on one side adjacent to the slideway (6); The clamping assembly (8) comprises: A horizontal groove (801), the horizontal groove (801) is longitudinally spaced apart and is located on both sides of the lifting groove (705) on the slideway (6), a positioning frame (802) is movably provided in the horizontal groove (801), the positioning frame (802) is arranged on a side adjacent to the slideway (6), and the end of the positioning frame (802) is slidably connected to the horizontal groove (801) by providing a slider; A fixed clamping plate (803), the fixed clamping plate (803) is fixedly arranged on one side inside the positioning frame (802), a movable clamping plate (804) is rotatably connected on the longitudinal axis of the positioning frame (802), a compression spring (805) is movably arranged between the fixed clamping plate (803) and the movable clamping plate (804), a pressure rod (806) is arranged on the outer wall of the movable clamping plate (804), and the end of the pressure rod (806) passes through the hole on the positioning frame (802) and is located on the outer side of the positioning frame (802); a transmission shaft (807), the transmission shaft (807) being rotatably connected to a mounting hole on the mounting plate (2), the number of the transmission shafts (807) being four, and a ball screw (808) being provided at the end of the transmission shaft (807); A pressure strip (809), the pressure strip (809) is longitudinally arranged on the outside of the pressure rod (806) and the end of the pressure strip is threadedly connected to the ball screw (808); Two second motors (810), the two second motors (810) are arranged on the back side of the mounting plate (2), and the output ends of the two second motors (810) are respectively connected to the ends of the two transmission shafts (807) above, and the ends of the transmission shafts (807) are also connected to the upper and lower ends of the transmission shafts (807) for ensuring the synchronous rotation of the upper and lower ball screws (808) on each side; A locking mechanism (9), the locking mechanism (9) being arranged on the mounting plate (2) and used to enhance the clamping effect of the fixed clamping plate (803) and the movable clamping plate (804); The locking mechanism (9) comprises: a positioning rod (901), the positioning rod (901) being arranged on a wall of the mounting plate (2), the end of the positioning rod (901) being slidably connected to a locking rod (902), the locking rod (902) being located on one side of the transmission shaft (807) and longitudinally passing between the fixed clamping plate (803) and the movable clamping plate (804); A locking plate (903), the locking plate (903) being arranged on the locking rod (902) and spaced apart from the movable clamping plate (804) and the fixed clamping plate (803), wherein a locking groove (904) matching the locking plate (903) is provided above the movable clamping plate (804) and the fixed clamping plate (803); A gear (905) is provided on a shaft wall at one end of the transmission shaft (807), and tooth grooves (906) matching the gear (905) are provided at both ends of the locking rod (902), a limit plate (907) is provided at the lower end of the locking rod (902), and a top spring (908) is sleeved on the lever arm at the lower end of the locking rod (902) and located below the limit plate (907).

2. The zipper fatigue resistance testing device according to claim 1, characterized in that: The reciprocating mechanism (7) includes: A first motor (701) is provided on the back side of the mounting plate (2) at the upper end of the through slot (5), and a lead screw (702) is rotatably connected to the back side of the mounting plate (2), one end of the lead screw (702) is connected to the output end of the first motor (701), and a lifting frame (703) is threadedly connected to the lead screw (702), and a clamping claw (704) is provided on one side of the lifting frame (703) through the through slot (5) for clamping the zipper head; A lifting groove (705), the lifting groove (705) is provided on the slideway (6), a guide block (706) is slidably connected in the lifting groove (705), guide grooves (707) are provided on both sides of the mounting plate (2) for improving the stability of the lifting frame (703), and both ends of the lifting frame (703) pass through the guide grooves (707) and are connected to the ends of the guide blocks (706); An electromagnetic block (708) is provided at one end of the guide block (706) away from the lifting frame (703), and a permanent magnet block (709) matching the electromagnetic block (708) is provided on the clamping portion of the clamping assembly (8).

3. The zipper fatigue resistance testing device according to claim 1, characterized in that: A pressing groove (8091) matching the pressing rod (806) is provided on the inner side of the pressing strip (809), and a gap is left between the inner wall of the pressing groove (8091) and the end of the pressing rod (806).

4. The zipper fatigue resistance testing device according to claim 1, characterized in that: The length of the tooth socket (906) is 3-5 cm.

5. The zipper fatigue resistance testing device according to claim 1, characterized in that: A support block (8021) is provided on the wall of the mounting plate (2) and located inside the positioning frame (802).

6. The zipper fatigue resistance testing device according to claim 1, characterized in that: The ends of the fixed clamping plate (803) and the movable clamping plate (804) are respectively provided with a conical protrusion and a conical groove for improving the clamping effect of the zipper.

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