Yarn tensile property detection device for knitted sweater production

Abstract

The invention discloses a yarn tensile property detection device for knitted sweater production, and belongs to the technical field of tensile property detection, the yarn tensile property detection device comprises a workbench, and a mounting block is fixedly mounted on the top wall of the workbench. According to the scheme, through cooperation of a clockwork spring and an annular plate, after a second clamping rod clamps yarn, a round rod drives a protruding block to enter an annular groove, at the moment, the clockwork spring stretches and drives the annular plate to rotate and reset, and in the rotating process of the annular plate, the annular plate drives a mounting rod to rotate through an inserting rod; then the mounting rod drives the first clamping rod and the second clamping rod to rotate, and the yarn can be wound on the first clamping rod and the second clamping rod in the rotating process of the first clamping rod and the second clamping rod, so that the situation that the yarn falls off in the detection process and influences the detection efficiency is avoided; and the yarn is wound on the first clamping rod and the second clamping rod, so that the situation that the yarn clamping point is damaged to affect the detection accuracy, and consequently repeated detection and calibration are needed can be avoided, and the detection efficiency is further improved.

Description

Technical Field

[0001] This invention relates to the field of tensile performance testing technology, and more specifically, to a device for testing the tensile performance of yarn used in knitted sweater production. Background Technology

[0002] Knitted sweater yarns can be divided into three main categories based on their raw materials: natural fiber yarns, chemical fiber yarns, and blended fiber yarns, each suited to different styles of sweater products.

[0003] The tensile properties of yarn directly determine the durability, stability, and wearing experience of finished garments. Therefore, accurate testing of yarn tensile properties is a key step in ensuring product quality. Existing tensile property testing devices typically fix both ends of the yarn with a three-jaw chuck and then pull the yarn with a tensile tester to test its tensile properties. However, to avoid the yarn detaching and affecting testing efficiency, it usually takes a long time to wrap the yarn around the three-jaw chuck many times, which reduces testing efficiency to some extent.

[0004] To address the aforementioned issues, some solutions have been proposed in the existing technology. For example, Chinese utility model patent CN214749378U discloses a device for testing the tensile strength of yarn used in knitted sweater production. This device allows the yarn to be directly hung on a hook, and the insertion rod can lock the hook to prevent the yarn from falling off and affecting the testing efficiency. However, in actual use, the user still needs to spend time tying the yarn into knots before hanging it on the hook, which still reduces the testing efficiency. Summary of the Invention

[0005] To address the problems existing in the prior art, the purpose of this invention is to provide a device for testing the tensile properties of yarn used in knitted sweater production, which can improve testing efficiency.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A device for testing the tensile properties of yarn used in the production of knitted sweaters includes a workbench, an installation block fixedly installed on the top wall of the workbench, a linkage block horizontally slidably installed on the workbench, a vertical plate fixedly installed on the top wall of the workbench, an electric telescopic rod fixedly installed on the vertical plate, and a testing component provided on the electric telescopic rod. The detection assembly includes a tension sensor fixedly installed at the output end of the electric telescopic pole. Mounting rods are rotatably mounted on both the mounting block and the linkage block. A first clamping rod is fixedly mounted on the mounting rod, and a second clamping rod is horizontally slidably mounted on the mounting rod. Mounting slots are provided on both the mounting block and the linkage block, and magnets are vertically slidably mounted within each slot. Electromagnets electrically connected to the electric telescopic pole are fixedly mounted on both the mounting block and the linkage block. A round rod is fixedly mounted on the top wall of the magnet, and a mounting plate is vertically slidably mounted on the mounting rod. A connecting rod is fixedly mounted at the bottom end of the mounting plate. A push plate that cooperates with the second clamping rod is fixedly mounted on the top wall of the mounting plate, and the top wall of the push plate is inclined.

[0008] Furthermore, an elastic pad is installed between the second clamping rod and the mounting rod. An annular plate is rotatably mounted on the mounting block, and the annular plate is rotatably engaged with the mounting rod. A spring is installed between the annular plate and the mounting block. A vertical groove is provided on the mounting rod, and an insert rod is vertically slidably installed in the vertical groove. An insertion hole is provided on the annular plate to engage with the insert rod. A cavity is provided on the elastic pad, and hydraulic oil is filled in the cavity. A connecting pipe communicating with the vertical groove is inserted into the cavity. A rotating assembly that engages with the round rod is provided on the annular plate.

[0009] Furthermore, the rotating assembly includes a spiral groove formed on an annular plate, a sliding groove communicating with the spiral groove formed on the annular plate, and an annular groove communicating with the sliding groove formed on the annular plate, and a protrusion that slides with the spiral groove is fixedly installed on the round rod.

[0010] Furthermore, the magnet block is provided with a limiting component that cooperates with the annular plate. The limiting component includes a linkage rod fixedly installed on the magnet block, a ratchet fixedly installed on the annular plate, and a ratchet tooth that meshes with the ratchet tooth rotatably installed on the linkage rod. A linkage spring is installed between the ratchet tooth and the linkage rod. A first spring is installed between the mounting plate and the mounting rod. An elastic airbag is fixedly installed between the top wall of the magnet block and the mounting groove.

[0011] Furthermore, a torque spring is installed between the mounting rod and the mounting block.

[0012] Furthermore, a first limiting rod and a second limiting rod are slidably installed on the top walls of the mounting block and the linkage block, respectively. A connecting groove is opened on both the linkage block and the mounting block. An elastic telescopic tube is installed between the first limiting rod, the second limiting rod, and the corresponding mounting block and linkage block. Adjacent elastic telescopic tubes are connected through the connecting groove. An air tube connected to the connecting groove is inserted into the elastic airbag.

[0013] Furthermore, anti-slip pads are fixedly installed on both the first and second limiting rods.

[0014] Furthermore, guide grooves are provided at the top ends of both the first and second limiting rods.

[0015] Furthermore, multiple sets of the linkage blocks and mounting blocks are evenly arranged, and these multiple sets of linkage blocks and mounting blocks are horizontally distributed on the top wall of the workbench.

[0016] Furthermore, the bottom end of the insertion rod is tapered and has a smooth surface.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) In this solution, the first clamping rod and the second clamping rod cooperate, and under the action of the magnetic field, the magnet block drives the round rod to move upward. During the upward movement of the round rod, it gradually contacts the connecting rod, and through the connecting rod and the mounting plate, it drives the push plate to move upward. Then, during the upward movement of the push plate, the inclined surface of the push plate gradually contacts the second clamping rod and drives the second clamping rod to move. During the movement of the second clamping rod, it gradually clamps the yarn together with the first clamping rod, so that the user does not need to manually fix the yarn, which improves the detection efficiency. (2) In this scheme, the yarn is clamped by the second clamping rod after the spring and the ring plate are engaged. The round rod drives the protrusion into the annular groove. At this time, the spring extends and drives the ring plate to rotate and reset. During the rotation of the ring plate, the ring plate drives the mounting rod to rotate through the insertion rod. Then the mounting rod drives the first clamping rod and the second clamping rod to rotate. During the rotation of the first clamping rod and the second clamping rod, the yarn can be wrapped around the first clamping rod and the second clamping rod, thereby avoiding the yarn falling off during the detection process and affecting the detection efficiency. In addition, by wrapping the yarn around the first clamping rod and the second clamping rod, the damage at the yarn clamping point can be avoided, which affects the accuracy of the detection and leads to repeated detection and calibration, thus further improving the detection efficiency. (3) By setting a torque spring, after the test is completed, as the elastic airbag drives the magnet to move downward, the elastic telescopic tube drives the first limit rod and the second limit rod to clamp one end of the yarn. After the insertion rod and the insertion hole are disengaged, the torque spring drives the mounting rod to rotate and reset. During the rotation of the mounting rod, the first clamping rod and the second clamping rod rotate and reset. During the rotation and reset of the first clamping rod and the second clamping rod, the yarn that can be wrapped on the first clamping rod and the second clamping rod becomes loose, which makes it easier for the tester to remove the yarn after the test, and further improves the test efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the mounting block, mounting rod, and annular plate of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 For the present invention Figure 2 Enlarged view at point B in the middle; Figure 5 This is a cross-sectional view of the mounting rod, elastic pad, and mounting plate of the present invention; Figure 6 This is a combination diagram of the ratchet, linkage spring, and linkage rod of the present invention; Figure 7 This is a combination diagram of the linkage block, the first limiting rod, and the elastic telescopic tube of the present invention; Figure 8 This is a diagram showing the assembly of the mounting plate, connecting rod, and push plate of the present invention.

[0019] Explanation of the labels in the diagram: 101. Workbench; 103. Mounting block; 104. Linkage block; 105. Vertical plate; 106. Electric telescopic rod; 2. Detection components; 201. Tension sensor; 202. Mounting rod; 203. First clamping rod; 204. Second clamping rod; 205. Magnet block; 206. Round rod; 207. Mounting plate; 208. Push plate; 209. Connecting rod; 210. Electromagnet; 301. Elastic pad; 302. Annular plate; 303. Spring; 304. Insert rod; 305. Insertion hole; 306. Cavity; 307. Connecting tube; 4. Rotating assembly; 401. Spiral groove; 402. Slide groove; 403. Annular groove; 404. Protrusion; 5. Limiting assembly; 501. Linkage rod; 502. Ratchet; 503. Ratchet tooth; 504. Linkage spring; 505. First spring; 506. Elastic airbag; 601. Torque spring; 602. First limiting rod; 603. Second limiting rod; 605. Connecting groove; 606. Elastic telescopic tube; 607. Air pipe; 608. Anti-slip mat; 609. Guide groove. Detailed Implementation

[0020] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] Please see Figures 1 to 8A yarn tensile strength testing device for knitted sweater production includes a workbench 101, an installation block 103 fixedly installed on the top wall of the workbench 101, a linkage block 104 horizontally slidably installed on the workbench 101, a vertical plate 105 fixedly installed on the top wall of the workbench 101, an electric telescopic rod 106 fixedly installed on the vertical plate 105, and a testing component 2 provided on the electric telescopic rod 106; The detection component 2 includes a tension sensor 201 fixedly installed at the output end of the electric telescopic rod 106. Mounting rods 202 are rotatably mounted on both the mounting block 103 and the linkage block 104. A first clamping rod 203 is fixedly mounted on the mounting rod 202, and a second clamping rod 204 is horizontally slidably mounted on the mounting rod 202. Mounting slots are provided on both the mounting block 103 and the linkage block 104, and magnet blocks 205 are vertically slidably mounted within each mounting slot. Electromagnets 210 electrically connected to the electric telescopic rod 106 are fixedly installed on both the mounting block 103 and the linkage block 104. A round rod 206 is fixedly installed on the top wall of the magnet block 205, and a mounting plate 207 is vertically slidably installed on the mounting rod 202. A connecting rod 209 is fixedly installed at the bottom end of the mounting plate 207. A push plate 208 that cooperates with the second clamping rod 204 is fixedly installed on the top wall of the mounting plate 207, and the top wall of the push plate 208 is inclined.

[0022] Before testing, the tester can place both ends of the yarn between the first clamping rod 203 and the second clamping rod 204 respectively. Then, the electric telescopic rod 106 is energized, and the electromagnet 210 is energized and generates a magnetic field. Due to the mutual repulsion between the electromagnet 210 and the magnet 205, the magnet 205 drives the round rod 206 to move upward under the action of the magnetic field. As the round rod 206 moves upward, it gradually comes into contact with the connecting rod 209. Through the connecting rod 209 and the mounting plate 207, the push plate 208 moves upward. As the push plate 208 moves upward, its inclined surface gradually comes into contact with the second clamping rod 204 and drives the second clamping rod 204 to move. As the second clamping rod 204 moves, it gradually clamps the yarn together with the first clamping rod 203. This eliminates the need for manual fixing of the yarn by the user, thus improving the testing efficiency.

[0023] Then, after the two sets of first clamping rods 203 and two sets of second clamping rods 204 clamp the two ends of the yarn respectively, the output end of the electric telescopic rod 106 retracts and drives the linkage block 104 to move through the tension sensor 201. During the movement of the linkage block 104, the yarn can be pulled by the first clamping rods 203 and the second clamping rods 204, thereby achieving the purpose of detecting the tensile strength of the yarn.

[0024] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, an elastic pad 301 is installed between the second clamping rod 204 and the mounting rod 202. An annular plate 302 is rotatably mounted on the mounting block 103, and the annular plate 302 is rotatably engaged with the mounting rod 202. A spring 303 is installed between the annular plate 302 and the mounting block 103. A vertical groove is provided on the mounting rod 202, and an insert rod 304 is vertically slidably installed in the vertical groove. An insertion hole 305 is provided on the annular plate 302 to cooperate with the insert rod 304. A cavity 306 is provided on the elastic pad 301, and the cavity 306 is filled with hydraulic oil. A connecting pipe 307 communicating with the vertical groove is inserted into the cavity 306. A rotating assembly 4 that cooperates with the round rod 206 is provided on the annular plate 302.

[0025] The rotating assembly 4 includes a spiral groove 401 formed on an annular plate 302, a sliding groove 402 that communicates with the spiral groove 401, an annular groove 403 that communicates with the sliding groove 402, and a protrusion 404 that slides with the spiral groove 401 is fixedly installed on the round rod 206.

[0026] The magnet block 205 is provided with a limiting component 5 that cooperates with the annular plate 302. The limiting component 5 includes a linkage rod 501 fixedly installed on the magnet block 205. A ratchet 502 is fixedly installed on the annular plate 302. A ratchet tooth 503 that meshes with the ratchet 502 is rotatably installed on the linkage rod 501. A linkage spring 504 is installed between the ratchet tooth 503 and the linkage rod 501. A first spring 505 is installed between the mounting plate 207 and the mounting rod 202. An elastic airbag 506 is fixedly installed between the top wall of the magnet block 205 and the mounting groove.

[0027] By adopting the above technical solution, during the upward movement of the round rod 206, the protrusion 404 gradually contacts the spiral groove 401 and moves upward along the spiral groove 401. During the upward movement of the protrusion 404 along the spiral groove 401, the protrusion 404 can drive the annular plate 302 to rotate through the spiral groove 401. At this time, the spring 303 begins to store power. Then, when the round rod 206 drives the protrusion 404 to enter the slide groove 402 through the spiral groove 401, the round rod 206 contacts the connecting rod 209 and drives the push plate 208 to move upward through the connecting rod 209 and the mounting plate 207. When the push plate 208 drives the second clamping rod 204 to clamp the yarn, the elastic pad 301 is compressed, and the hydraulic oil in the cavity 306 enters the vertical groove through the connecting pipe 307. Under the action of the hydraulic oil, the insertion rod 304 moves downward and inserts into the insertion hole 305, thereby allowing the annular plate 302 to rotate. 02 is connected to the mounting rod 202. After the second clamping rod 204 clamps the yarn, the round rod 206 drives the protrusion 404 into the annular groove 403. At this time, the spring 303 extends and drives the annular plate 302 to rotate and reset. During the rotation of the annular plate 302, the annular plate 302 drives the mounting rod 202 to rotate through the insertion rod 304. Then, the mounting rod 202 drives the first clamping rod 203 and the second clamping rod 204 to rotate. During the rotation of the first clamping rod 203 and the second clamping rod 204, the yarn can be wrapped around the first clamping rod 203 and the second clamping rod 204, thereby avoiding the yarn falling off during the detection process and affecting the detection efficiency. In addition, by wrapping the yarn around the first clamping rod 203 and the second clamping rod 204, the damage at the yarn clamping point can be avoided, which would affect the accuracy of the detection and lead to repeated detection and calibration, thus further improving the detection efficiency.

[0028] When the magnet 205 moves upward, the ratchet 503 moves upward via the linkage rod 501. After the round rod 206 drives the protrusion 404 into the slide groove 402, the linkage rod 501 drives the ratchet 503 to contact and mesh with the ratchet 502. Then, when the spring 303 drives the ratchet 502 to rotate via the annular plate 302, the linkage spring 504 drives the ratchet 502 to swing back and forth. Then, when the yarn is subjected to tensile testing, the yarn will resist the first clamping rod 203 and the second clamping rod 203. 04. Applying tension causes the first clamping rod 203 and the second clamping rod 204 to rotate and untangle the yarn. Since the mounting rod 202 is connected to the annular plate 302 through the insertion rod 304, the ratchet 502 and the ratchet 503 can prevent the first clamping rod 203 and the second clamping rod 204 from rotating. This effectively avoids the yarn from falling off due to the rotation of the first clamping rod 203 and the second clamping rod 204 during the tensile test, thus improving the test efficiency.

[0029] like Figure 4 , Figure 7As shown, a torque spring 601 is installed between the mounting rod 202 and the mounting block 103.

[0030] The top walls of the mounting block 103 and the linkage block 104 are respectively slidably equipped with a first limiting rod 602 and a second limiting rod 603. Both the linkage block 104 and the mounting block 103 are provided with a connecting groove 605. The first limiting rod 602 and the second limiting rod 603 and the corresponding mounting block 103 and linkage block 104 are all connected by an elastic telescopic tube 606. Adjacent elastic telescopic tubes 606 are connected through the connecting groove 605. An air tube 607 connected to the connecting groove 605 is inserted into the elastic airbag 506.

[0031] Anti-slip pads 608 are fixedly installed on both the first limiting rod 602 and the second limiting rod 603.

[0032] The top ends of the first limiting rod 602 and the second limiting rod 603 are both provided with guide grooves 609.

[0033] By adopting the above technical solution, during the upward movement of the magnet block 205, the elastic airbag 506 is gradually compressed and tends to recover. During the upward movement of the mounting plate 207 driven by the connecting rod 209, the first spring 505 is stretched and tends to recover. During the rotation of the mounting rod 202 driven by the annular plate 302 via the insertion rod 304, the linkage spring 504 gradually stores force. After the detection is completed, the output end of the electric telescopic rod 106 extends and drives the linkage block 104 to reset via the tension sensor 201. After the linkage block 104 resets, the electric telescopic rod 106 is de-energized, and the electromagnet 210 is de-energized. Then, the elastic airbag 506 extends and drives the magnet block 205 to drive the round rod 206 to reset downward. During the downward movement of the round rod 206, the protrusion 404 moves downward along the slide groove 402 and gradually disengages from the mounting plate 207. At this time, the first spring 505 contracts and drives the mounting plate 207 to move downward. During the downward movement of the mounting plate 207, the elastic pad 301 extends and drives the second clamping rod 204 to reset. During the extension of the elastic pad 301, the cavity 306 draws hydraulic oil from the vertical groove through the connecting pipe 307. At this time, the insertion rod 304 moves upward and disengages from the insertion hole 305. After the insertion rod 304 disengages from the insertion hole 305, the torque spring 601 drives the mounting rod 202 to rotate and reset. During the rotation of the mounting rod 202, the first clamping rod 203 and the second clamping rod 204 rotate and reset. During the rotation and reset of the first clamping rod 203 and the second clamping rod 204, the yarn that can be wrapped around the first clamping rod 203 and the second clamping rod 204 becomes loose, which makes it easier for the inspection personnel to remove the yarn after inspection, further improving the inspection efficiency.

[0034] As the round rod 206 drives the protrusion 404 to move downward along the slide groove 402, the protrusion 404 gradually re-enters the spiral groove 401 through the slide groove 402, and drives the annular plate 302 to rotate through the spiral groove 401. At this time, the spring 303 stores power again, and after the protrusion 404 disengages from the spiral groove 401, the spring 303 extends again and drives the annular plate 302 to reset, thus preparing for the next operation.

[0035] As the mounting plate 207 moves upward and compresses the elastic airbag 506, the elastic airbag 506 fixed at its top gradually approaches the pressure surface of the inner top wall of the mounting block 103 and is squeezed and contracted. The airflow inside the airbag flows through the air pipe 607 into the connecting groove 605, and then through the connecting groove 605 into the elastic telescopic tube 606. Then the pressure inside the elastic telescopic tube 606 increases. When the protrusion 404 enters the sliding groove 402, the pressure is greater than the elastic force inside the elastic telescopic tube 606. At this time, under the action of pressure, the elastic telescopic tube 606... 6. The elastic airbag 506 extends, causing the corresponding first limiting rod 602 and second limiting rod 603 to move away from each other. During this process, the yarn gradually enters the space between the first limiting rod 602 and second limiting rod 603. After the test is completed, as the elastic airbag 506 extends and causes the magnet block 205 to move downward, the elastic airbag 506 draws air from the elastic telescopic tube 606 through the air pipe 607 and the connecting groove 605. Then, the elastic telescopic tube 606 contracts and causes the first limiting rod to move away from each other. When the first limiting rod 602 and the second limiting rod 603 approach each other, and during this process, the first limiting rod 602 and the second limiting rod 603 can clamp the yarn. Therefore, when the torque spring 601 drives the first clamping rod 203 to rotate and untangle the yarn via the mounting rod 202, the end of the yarn away from the first clamping rod 203 can be fixed, thus preventing the yarn from rotating with the first clamping rod 203, which would otherwise require manual untangling by the inspector. During the stretching test, the elastic airbag 506 inflates to drive the first limiting rod 602 and the second limiting rod 603 to open, forming a yarn inlet channel. After the magnetic force is removed at the end of the test, the elastic airbag 506 extends and drives the magnet block 205 to reset due to negative pressure. At the same time as the mounting rod 202 reverses to release the yarn, the first limiting rod 602 and the second limiting rod 603 actively retract the yarn tail end, preventing the yarn from rotating and getting stuck in the mechanical gap when the mounting rod 202 reverses to release the yarn, thus further improving the testing efficiency.

[0036] When the two ends of the yarn are placed on the corresponding first clamping rod 203 and second clamping rod 204, the yarn can be placed in the guide groove 609, thereby preventing the yarn from falling off the first limiting rod 602 and second limiting rod 603, which would affect the subsequent clamping effect of the first limiting rod 602 and second limiting rod 603 on the yarn and require the inspection personnel to spend time straightening the yarn. In addition, by setting the anti-slip pad 608, the clamping effect of the first limiting rod 602 and second limiting rod 603 on the yarn can be improved, further improving the inspection efficiency.

[0037] like Figure 1 , Figure 3 As shown, multiple sets of linkage blocks 104 and mounting blocks 103 are evenly arranged, and the multiple sets of linkage blocks 104 and mounting blocks 103 are horizontally distributed on the top wall of the workbench 101.

[0038] The bottom end of the insertion rod 304 is tapered and has a smooth surface.

[0039] By adopting the above technical solution, and by uniformly arranging multiple sets of mounting blocks 103 and linkage blocks 104, multiple sets of yarns can be detected simultaneously. Furthermore, by making the bottom end of the insertion rod 304 a smooth cone shape, it is easier for the insertion rod 304 to be inserted into the insertion hole 305, thereby further improving the detection efficiency.

[0040] Instructions for use: First, take the yarn for the knitted sweater to be tested, cut several samples of equal length according to the testing requirements, and place the two ends of each group of yarns between the first clamping rod 203 and the second clamping rod 204 on the mounting block 103 and the linkage block 104 respectively; at the same time, insert the yarn into the guide groove 609 at the top of the first limiting rod 602 and the second limiting rod 603 to prevent the yarn from falling off.

[0041] Then, the power supply of the electric telescopic rod 106 is turned on, triggering the electromagnet 210 to generate a magnetic field, which drives the magnet block 205 to move the round rod 206 vertically upward. During the upward movement of the round rod 206, the round rod 206 drives the annular plate 302 to rotate through the protrusion 404 and the spiral groove 401, and causes the spring 303 to accumulate power synchronously. When the protrusion 404 enters the slide groove 402, the round rod 206 contacts the connecting rod 209 and pushes the mounting plate 207 and the push plate 208 to move upward. The inclined surface of the push plate 208 contacts the second clamping rod 204, driving the second clamping rod 204 to move horizontally and cooperate with the first clamping rod 203 to clamp the end of the yarn.

[0042] When clamped, the elastic pad 301 is compressed, and the hydraulic oil in the cavity 306 flows into the vertical groove through the connecting pipe 307, pushing the insertion rod 304 down to insert into the insertion hole 305, thus achieving a rigid connection between the annular plate 302 and the mounting rod 202. When the protrusion 404 enters the annular groove 403, the spring 303 extends and drives the annular plate 302 to rotate and reset. The insertion rod 304 drives the mounting rod 202 to rotate, thereby driving the first clamping rod 203 and the second clamping rod 204 to rotate, wrapping the yarn end around the clamping rods of the first clamping rod 203 and the second clamping rod 204 to prevent it from falling off during testing.

[0043] In addition, when the magnet block 205 moves upward, the ratchet 503 moves upward through the linkage rod 501 and engages with the ratchet 502 on the annular plate 302, locking the rotation state of the mounting rod 202. This prevents the first clamping rod 203 from reversing and loosening the yarn during tensile testing, controls the output end of the electric telescopic rod 106 to retract, and pulls the linkage block 104 to slide horizontally along the worktable 101 through the tension sensor 201. Then, the linkage block 104 drives the clamping assembly at its end to move and applies axial tension to the yarn sample.

[0044] After the test, the round rod 206 disengages from the connecting rod 209. At this time, the first spring 505 contracts and pulls the mounting plate 207 and the push plate 208 down to reset. At the same time, the elastic pad 301 extends, and the cavity 306 draws hydraulic oil from the vertical groove through the connecting pipe 307. The insertion rod 304 moves up and disengages from the insertion hole 305. At this time, the torque spring 601 drives the mounting rod 202 to rotate and reset. The first clamping rod 203 and the second clamping rod 204 rotate synchronously to release the yarn from its entanglement state.

[0045] The above description is merely a preferred embodiment of the present invention; however, 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 its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the tensile strength of yarn used in knitted sweater production, comprising a workbench (101), characterized in that: An installation block (103) is fixedly installed on the top wall of the workbench (101), a linkage block (104) is horizontally slidably installed on the workbench (101), and a vertical plate (105) is fixedly installed on the top wall of the workbench (101). An electric telescopic rod (106) is fixedly installed on the vertical plate (105), and a detection component (2) is provided on the electric telescopic rod (106). The detection component (2) includes a tension sensor (201) fixedly installed at the output end of the electric telescopic rod (106). Mounting rods (202) are rotatably mounted on both the mounting block (103) and the linkage block (104). A first clamping rod (203) is fixedly mounted on the mounting rod (202), and a second clamping rod (204) is horizontally slidably mounted on the mounting rod (202). Mounting grooves are provided on both the mounting block (103) and the linkage block (104), and magnet blocks (205) are vertically slidably mounted within each mounting groove. Both block (103) and linkage block (104) are fixedly installed with electromagnets (210) electrically connected to electric telescopic rod (106). A round rod (206) is fixedly installed on the top wall of the magnet block (205), and an installation plate (207) is vertically slidably installed on the installation rod (202). A connecting rod (209) is fixedly installed at the bottom end of the installation plate (207). A push plate (208) that cooperates with the second clamping rod (204) is fixedly installed on the top wall of the installation plate (207), and the top wall of the push plate (208) is inclined.

2. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 1, characterized in that: An elastic pad (301) is installed between the second clamping rod (204) and the mounting rod (202). An annular plate (302) is rotatably mounted on the mounting block (103), and the annular plate (302) is rotatably engaged with the mounting rod (202). A spring (303) is installed between the annular plate (302) and the mounting block (103). A vertical groove is provided on the mounting rod (202), and a plug rod (304) is vertically slidably installed in the vertical groove. An insertion hole (305) is provided on the annular plate (302) to engage with the plug rod (304). A cavity (306) is provided on the elastic pad (301), and the cavity (306) is filled with hydraulic oil. A connecting pipe (307) communicating with the vertical groove is inserted into the cavity (306). A rotating assembly (4) engaging with the round rod (206) is provided on the annular plate (302).

3. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 2, characterized in that: The rotating assembly (4) includes a spiral groove (401) formed on an annular plate (302), a sliding groove (402) communicating with the spiral groove (401) formed on the annular plate (302), an annular groove (403) communicating with the sliding groove (402) formed on the annular plate (302), and a protrusion (404) that slides with the spiral groove (401) is fixedly installed on the round rod (206).

4. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 3, characterized in that: The magnet block (205) is provided with a limiting component (5) that cooperates with the annular plate (302). The limiting component (5) includes a linkage rod (501) fixedly installed on the magnet block (205). A ratchet (502) is fixedly installed on the annular plate (302), and a ratchet tooth (503) that meshes with the ratchet tooth (502) is rotatably installed on the linkage rod (501). A linkage spring (504) is installed between the ratchet tooth (503) and the linkage rod (501). A first spring (505) is installed between the mounting plate (207) and the mounting rod (202). An elastic airbag (506) is fixedly installed between the top wall of the magnet block (205) and the mounting groove.

5. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 1, characterized in that: A torque spring (601) is installed between the mounting rod (202) and the mounting block (103).

6. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 4, characterized in that: The top walls of the mounting block (103) and the linkage block (104) are respectively slidably equipped with a first limiting rod (602) and a second limiting rod (603). The linkage block (104) and the mounting block (103) are respectively provided with a connecting groove (605). The first limiting rod (602) and the second limiting rod (603) and the corresponding mounting block (103) and linkage block (104) are all connected by an elastic telescopic tube (606). Two adjacent elastic telescopic tubes (606) are connected through the connecting groove (605). The elastic airbag (506) is provided with an air tube (607) connected to the connecting groove (605).

7. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 6, characterized in that: Anti-slip pads (608) are fixedly installed on both the first limiting rod (602) and the second limiting rod (603).

8. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 6, characterized in that: The top ends of the first limiting rod (602) and the second limiting rod (603) are both provided with guide grooves (609).

9. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 1, characterized in that: Multiple sets of linkage blocks (104) and mounting blocks (103) are evenly arranged, and the multiple sets of linkage blocks (104) and mounting blocks (103) are horizontally distributed on the top wall of the workbench (101).

10. The device for testing the tensile strength of yarn used in knitted sweater production according to claim 2, characterized in that: The bottom end of the insertion rod (304) is tapered, and the bottom end of the insertion rod (304) is a smooth surface.

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