A yarn twist measuring instrument

Abstract

The present invention belongs to the technical field of yarn twist testing, and specifically is a yarn twist measuring instrument, comprising a workbench, on which a loading platform, a cutting mechanism and a twist testing mechanism are sequentially arranged, and further comprising a motion mechanism and two groups of clamping mechanisms and a clutch mechanism. By setting two clamping mechanisms, one of the clamping mechanisms clamps the yarn end and then sends the yarn end to a rotating chuck, while the other clamping mechanism moves to the other end of the yarn segment and clamps the other end of the yarn. The two clamping mechanisms alternately perform the work of conveying the yarn ends. When the yarn ends are mounted on the rotating chuck, the clamping mechanism only needs to perform a one-way motion, thereby improving the work efficiency. Only by controlling the rotation of the transmission gear, the position swapping of the two groups of clamping mechanisms, the position adjustment of the mounting seat, and the assembly switching of the mounting seat between the base and the rotating chuck can be automatically completed, so as to perform the untwisting operation. The present invention has a high degree of automation and is convenient to operate.

Description

Technical Field

[0001] The invention belongs to the field of yarn twist testing, in particular to a yarn twist tester. Background Art

[0002] In order to process and improve the performance of yarn, it is necessary to twist the yarn. Yarn twist is the number of twists per unit length of yarn, which is used to measure the degree of twisting of yarn of the same fineness. Common testing methods for yarn twist include direct counting method. Under a certain tension, a yarn sample of a specified length is clamped at both ends, and one end is rotated in the untwisting direction until the single yarns in the ply are completely parallel, and the number of untwisted twists is measured.

[0003] A patent document with publication number CN219320296U discloses a yarn twist testing device, including a twist tester body and a wire cutting mechanism. The twist tester body is provided with a rotating chuck, and the wire cutting mechanism is arranged on the rotating chuck. The bobbin with the wound yarn is placed on the yarn frame, one end of the yarn is passed through the lead ring, the yarn is fixed with the first clamping plate, and the upper clamping block is loosened so that the two blades are quickly clamped together, and the excess wire is disassembled to prevent the excess wire from being entangled, thereby improving the test work efficiency.

[0004] The above technical solution still has some problems in the working process. It still adopts the traditional method to assemble the yarn end onto the rotating chuck. The traditional assembly method is: first move the clamping device to the position of the bobbin, clamp the thread end, then move the clamping device to the rotating chuck, and finally assemble the thread end onto the rotating chuck; when measuring the twist of the next section of yarn, it is necessary to repeat the above steps and drive the clamping device back and forth again. Therefore, each time the twist is measured, the clamping device that clamps the thread end needs to perform two back and forth movements. Not only is the movement stroke long, but the working efficiency is also low. The above technical solution does not effectively solve this problem.

[0005] To this end, the present invention provides a yarn twist measuring instrument. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve the technical problem is as follows: a yarn twist measuring instrument described in the present invention comprises a workbench, on which a feeding table, a cutting mechanism and a twist testing mechanism are sequentially arranged, the feeding table is used to place a yarn tube, and also comprises a motion mechanism and two groups of clamping mechanisms, the two groups of the clamping mechanisms are used to clamp the two ends of the yarn, and the motion mechanism is used to drive the clamping mechanism to move;

[0008] Wherein, the motion mechanism comprises: two slide rails arranged on the workbench; a slide seat slidably arranged on the slide rails; a transmission gear rotatably arranged on the workbench, and the two slide seats are respectively meshed and connected with the transmission gear;

[0009] The clamping mechanism comprises: a base slidably arranged on the slide seat; a mounting seat movably arranged on the base; a clamping claw assembly arranged on the top of the mounting seat; the twist testing mechanism comprises a body, and a rotating chuck for assembling the mounting seat is arranged on the body.

[0010] Preferably, the two slides are staggered front and back, the center of the mounting seat and the center of the rotary chuck are located on the same vertical plane, and after the two jaw assemblies clamp the two ends of the yarn, the yarn is coaxial with the rotary chuck.

[0011] Preferably, the motion mechanism also includes: two double-sided inclined plates arranged on the workbench, with slopes on both sides of the double-sided inclined plates, and the double-sided inclined plates are used to push the two bases away from each other; and a return spring arranged on the slide seat for pushing the base to move back.

[0012] Preferably, it also includes a clutch mechanism, which includes: an assembly part slidably arranged in the mounting seat, the assembly part extends to the outside of the mounting seat; and assembly grooves respectively arranged on the base and the rotating chuck, the assembly part is inserted into the assembly groove and fixed to one of the base and the rotating chuck.

[0013] Preferably, the clutch mechanism also includes: a push plate slidably arranged on the mounting seat, the push plate being provided with two bevel plates, and the push plate drives the assembly to move through the bevel plates after the push plate moves; a first spring arranged on the mounting seat for pushing the push plate to move toward the outside of the mounting seat; and a pressure plate arranged on the workbench, the pressure plate being used to push the push plate to move toward the inside of the mounting seat.

[0014] Preferably, the push plate and the yarn are staggered, and a slope is provided on one side of the pressure plate close to the machine body.

[0015] Preferably, the clutch mechanism further comprises: two rotating shafts slidably arranged on the mounting seat; and slots provided on the side walls of the base, wherein the rotating shafts extend to the outside of the mounting seat and are inserted into the slots.

[0016] Preferably, the clutch mechanism also includes: a second spring arranged on the mounting seat for pushing the rotating shaft to extend outward; a magnetic block arranged at the outer end of the rotating shaft; and an annular electromagnet arranged on the workbench, which repels the magnetic block when energized and pushes the rotating shaft to move toward the inside of the mounting seat.

[0017] Preferably, the axis center line of the rotating shaft is located at the center of the clamping jaw assembly, and the top end of the push plate is located above the rotating shaft.

[0018] Preferably, after the base moves to the position of the rotating chuck, the rotating shaft is located inside the annular electromagnet.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. The yarn twist measuring instrument described in the present invention is provided with two clamping mechanisms, wherein one clamping mechanism clamps the yarn end and then sends the yarn end to the rotating chuck, and at the same time, the other clamping mechanism moves to the other end of the yarn segment and clamps the other end of the yarn. The two clamping mechanisms perform the thread end conveying work alternately. When the thread end is installed on the rotating chuck, the clamping mechanism only needs to perform a one-way movement. Compared with the traditional method of operating the clamping device to move back and forth, the work efficiency is improved and the use is more convenient.

[0021] 2. The yarn twist measuring instrument described in the present invention sets the jaw assembly as a structure with adjustable position state. The jaw assembly on the left side opens upward to clamp the yarn end. The jaw assembly on the right side is rotated 90° and then assembled on the rotating chuck. During untwisting, the yarn only contacts the two jaw assemblies and does not touch other structures. The mounting seat is assembled on the rotating chuck through a clutch, and the mounting seat is completely separated from the base to ensure that the untwisting work can proceed smoothly.

[0022] 3. The yarn twist measuring instrument described in the present invention can automatically complete the position swapping of the two sets of clamping mechanisms, the position adjustment of the mounting seat, and the assembly and switching of the mounting seat between the base and the rotating chuck, only by controlling the rotation of the transmission gear, so as to perform the yarn untwisting operation, with a high degree of automation and more convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 is a three-dimensional diagram of the first embodiment of the present invention;

[0025] Figure 2 It is an exploded view of the workbench and clamping mechanism;

[0026] Figure 3 This is an exploded view of a single set of slides and bases;

[0027] Figure 4 It is a cross-sectional view of the base and internal structure;

[0028] Figure 5 This is an exploded view of the base and mounting base;

[0029] Figure 6It is an exploded view of the mounting seat, shaft, clutch and push plate;

[0030] Figure 7 It is a schematic diagram of the rotary chuck and the machine body;

[0031] In the figure: 1. workbench; 11. loading table; 12. cutting mechanism; 13. twist testing mechanism; 131. machine body; 132. rotary chuck; 2. moving mechanism; 21. slide rail; 22. slide seat; 23. transmission gear; 24. double-sided inclined plate; 25. reset spring; 3. clamping mechanism; 31. base; 32. mounting seat; 33. clamping claw assembly; 4. clutch mechanism; 41. assembly part; 42. assembly groove; 43. push plate; 44. first spring; 45. pressure plate; 46. rotating shaft; 461. second spring; 47. slot; 48. magnet; 49. annular electromagnet. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods. Embodiment 1

[0033] like Figure 1-5 As shown, a yarn twist measuring instrument according to an embodiment of the present invention comprises a workbench 1, on which a loading platform 11, a cutting mechanism 12 and a twist testing mechanism 13 are sequentially arranged, the loading platform 11 is used to place a yarn tube, and further comprises a motion mechanism 2 and two groups of clamping mechanisms 3, the two groups of the clamping mechanisms 3 are used to clamp the two ends of the yarn, and the motion mechanism 2 is used to drive the clamping mechanisms 3 to move;

[0034] The motion mechanism 2 comprises: two slide rails 21 arranged on the workbench 1; a slide seat 22 slidably arranged on the slide rails 21; a transmission gear 23 rotatably arranged on the workbench 1, and the two slide seats 22 are respectively meshed and connected with the transmission gear 23;

[0035] The clamping mechanism 3 includes: a base 31 slidably arranged on the slide 22; a mounting seat 32 movably arranged on the base 31; a clamping claw assembly 33 arranged on the top of the mounting seat 32; the twist testing mechanism 13 includes a body 131, and a rotating chuck 132 for assembling the mounting seat 32 is provided on the body 131.

[0036] Specifically, the machine body 131 adopts a yarn twist meter, and the yarn twist meter can measure the yarn twist data after untwisting the yarn. The feeding platform 11, the cutting mechanism 12 and the twist testing mechanism 13 are distributed from left to right in sequence, and the two groups of clamping mechanisms 3 move between the feeding platform 11 and the machine body 131. The cutting mechanism 12 is preferably, but not limited to, a cutter device that can move up and down. The slide 22 can move left and right, and the base 31 can move forward and backward relative to the slide 22. The slide 22 is provided with a rack plate meshing with the transmission gear 23. The two slides 22 are symmetrically distributed about the center of the transmission gear 23, and the two slides 22 move synchronously in the opposite direction through the transmission gear 23. The clamping jaw assembly 33 is preferably, but not limited to, an elastic clip or a clamping plate structure.

[0037] During the operation of a traditional yarn twist meter, when measuring the twist of a section of yarn, it is necessary to first move the clamping device to the position of the yarn tube on the left, clamp the thread end, and then move it to the right to the machine body 131, and then assemble the thread end onto the rotating clamp 132; when measuring the twist of the next section of yarn, it is necessary to repeat the above steps and drive the clamping device to move back and forth again. Therefore, each time the twist is measured, the clamping device that clamps the thread end needs to move back and forth twice, which not only has a long movement stroke, but also has low work efficiency. In order to improve this problem, two sets of clamping mechanisms 3 with synchronous reverse motion are set.

[0038] The left and right clamping mechanisms 3 are A and B respectively, and the initial state is as follows Figure 1 and 2 As shown, A is located on the left side and B is located on the right side. The clamping claw assembly 33 in A clamps the thread end of the yarn, and the transmission gear 23 is started to rotate. The transmission gear 23 drives the two slides 22 and the two groups of clamping mechanisms 3 to move synchronously in the opposite direction. A moves to the right to the position of the rotating chuck 132, and the mounting seat 32 is removed from the slide 22 of A and installed on the rotating chuck 132. B moves to the left side and clamps the left end of the yarn. After the yarn is cut off by the cutting mechanism 12, B does not move, and the body 131 is started. The rotating chuck 132 drives the thread end to rotate, and the untwisting work begins until the single yarns in the strand are completely parallel. The number of untwisted turns is measured to measure the twist of the yarn segment.

[0039] When measuring the twist of the next section of yarn, the yarn head on the yarn bobbin is clamped on B, and the transmission gear 23 is started to rotate, so that the positions of A and B are swapped. B clamps the yarn end and transports it to the right, and the yarn head is assembled on the rotating chuck 132. A moves to the left and clamps the left end of the yarn, and the yarn twist measurement work can continue. By setting up two clamping mechanisms 3, the yarn head is clamped and fixed and assembled on the rotating chuck 132 alternately. The clamping mechanism 3 only needs to perform a one-way movement. Compared with the traditional method of operating the clamping device to move back and forth, the work efficiency is improved and it is more convenient to use.

[0040] like Figure 1-2 As shown, the two slides 22 are staggered front and back, the center of the mounting seat 32 and the center of the rotating chuck 132 are located on the same vertical plane, and after the two jaw assemblies 33 clamp the two ends of the yarn, the yarn is coaxial with the rotating chuck 132.

[0041] Specifically, the centers of the two clamping jaw assemblies 33 are coaxially arranged with the rotating chuck 132, so that the yarn is coaxial with the rotating axis of the rotating chuck 132, which is conducive to the normal performance of the subsequent yarn untwisting work.

[0042] like Figure 1-3 As shown, the motion mechanism 2 also includes: two double-sided inclined plates 24 arranged on the workbench 1, with slopes on both sides of the double-sided inclined plates 24, and the double-sided inclined plates 24 are used to push the two bases 31 away from each other; a return spring 25 arranged on the slide 22 for pushing the base 31 to move back.

[0043] Specifically, the two slides 22 are symmetrically distributed about the axis of the rotating chuck 132, and the two ends of the reset spring 25 are respectively connected to the slide 22 and the base 31. The two jaw assemblies 33 need to remain coaxial after moving to the two ends to prevent the yarn from bending. When the two bases 31 approach each other during movement, the bilateral inclined plates 24 push the two jaw assemblies 33 apart to prevent collision and motion interference between the two jaw assemblies 33, thereby ensuring that the two sets of clamping mechanisms 3 can be smoothly swapped.

[0044] like Figure 2-7 As shown, it also includes a clutch mechanism 4, which includes: an assembly part 41 slidably arranged in the mounting seat 32, and the assembly part 41 extends to the outside of the mounting seat 32; an assembly groove 42 respectively arranged on the base 31 and the rotating chuck 132, and the assembly part 41 is inserted into the assembly groove 42 and fixed to one of the base 31 and the rotating chuck 132.

[0045] Specifically, the fit between the assembly part 41 and the assembly groove 42 is preferably but not limited to friction fit, and the friction force after the two are assembled is greater than the yarn pulling force during the untwisting process. Other structures that can satisfy that the assembly part 41 can be fixed as a whole with the assembly groove 42 after being inserted into the assembly groove 42, and the assembly part 41 will not be pulled out of the assembly groove 42 during the untwisting process are all suitable for the manufacture of the assembly part 41 and the assembly groove 42.

[0046] like Figure 1-6As shown, the clutch mechanism 4 also includes: a push plate 43 slidably arranged on the mounting seat 32, the push plate 43 is provided with two bevel plates, and after the push plate 43 moves, the assembly part 41 is driven to move through the bevel plates; a first spring 44 arranged on the mounting seat 32 for pushing the push plate 43 to move toward the outside of the mounting seat 32; and a pressure plate 45 arranged on the workbench 1, the pressure plate 45 is used to push the push plate 43 to move toward the inside of the mounting seat 32.

[0047] Specifically, the mounting seat 32 is cylindrical, and the push plate 43 and the assembly part 41 are preferably perpendicular to the moving direction. The assembly part 41 moves along the axial direction of the mounting seat 32, and the push plate 43 moves along the radial direction of the mounting seat 32. In the movement of the push plate 43 and the assembly part 41, the direction of movement toward the outside of the mounting seat 32 is outward movement, and the opposite direction is inward movement.

[0048] The two clamping jaw assemblies 33 need to be able to clamp the thread end and move. If the two sets of mounting bases 32 and the clamping jaw assemblies 33 are always kept as Figure 2 If the position of B in the middle is changed, then after B moves from the right side to the left side, the mounting seat 32 and other mechanisms in B will hinder the yarn, and it is impossible to clamp the left end of the yarn normally, and it is also impossible to perform the subsequent untwisting work normally. For this reason, the clamping jaw assembly 33 is set as a structure with adjustable position. Initially, the left clamping jaw assembly 33 opens upward to clamp the yarn end. The right clamping jaw assembly 33 is rotated 90° and assembled on the rotating chuck 132. When untwisting, the yarn only contacts the two clamping jaw assemblies 33, and the yarn does not touch other structures, so as to ensure that the untwisting work can be carried out smoothly.

[0049] like Figure 1-6 As shown, the push plate 43 is staggered with the yarn, and a slope is provided on one side of the pressing plate 45 close to the machine body 131 .

[0050] Specifically, a slope is provided on the right side of the bottom end of the pressure plate 45, and the push plate 43 is staggered with the yarn. During the untwisting process, the rotating chuck 132 drives the mounting seat 32 and the push plate 43 to rotate, and the push plate 43 never contacts the yarn to avoid interference with the untwisting action. Embodiment 2

[0051] like Figure 2-6 As shown, compared with Example 1, another implementation of the present invention is: the clutch mechanism 4 also includes: two rotating shafts 46 slidably arranged on the mounting seat 32; a slot 47 opened on the side wall of the base 31, and the rotating shaft 46 extends to the outside of the mounting seat 32 and is inserted into the slot 47.

[0052] Specifically, after the rotating shaft 46 is inserted into the slot 47 and the assembly part 41 is separated from the assembly slot 42 in the base 31 , the mounting seat 32 can rotate around the rotating shaft 46 as the axis.

[0053] like Figure 2-6 As shown, the clutch mechanism 4 also includes: a second spring 461 arranged on the mounting seat 32 for pushing the rotating shaft 46 to extend outward; a magnetic block 48 arranged at the outer end of the rotating shaft 46; and an annular electromagnet 49 arranged on the workbench 1. When the annular electromagnet 49 is energized, it repels the magnetic block 48 and pushes the rotating shaft 46 to move toward the inside of the mounting seat 32.

[0054] Specifically, the magnetic block 48 is disposed at one end of the rotating shaft 46 away from the mounting seat 32 . When the annular electromagnet 49 is energized, the inner wall of the electromagnet and the magnetic block 48 repel each other with the same polarity.

[0055] like Figure 3-5 As shown, the axis of the rotating shaft 46 is located at the center of the clamping jaw assembly 33 , and the top end of the pushing plate 43 is located above the rotating shaft 46 .

[0056] Specifically, when the base 31 moves from left to right, the top of the push plate 43 contacts the pressure plate 45, and the contact point is located above the rotating shaft 46. Therefore, it can drive the mounting base 32 to rotate counterclockwise, so that after the mounting base 32 rotates, the side where the assembly part 41 is located is aligned with the rotating chuck 132.

[0057] like Figure 1 As shown, after the base 31 moves to the position of the rotating chuck 132 , the rotating shaft 46 is located inside the annular electromagnet 49 .

[0058] Specifically, after the mounting seat 32 is assembled on the rotating chuck 132, when the yarn is untwisted, the annular electromagnet 49 is energized and the rotating chuck 132 rotates. During the rotation, the rotating shaft 46 is always located inside the annular electromagnet 49, and the magnetic force always pushes the rotating shaft 46 to move inward. The rotating shaft 46 is always retracted inside the mounting seat 32 and does not contact the base 31, so as to ensure the smooth progress of the untwisting work.

[0059] Working principle: The left and right clamping mechanisms 3 are A and B respectively. Initially, A is located on the left and B is located on the right. Take A as an example for explanation. Initially, the mounting seat 32 in A is in a vertical state, the push plate 43 extends to the right side of the mounting seat 32, the assembly part 41 extends below the mounting seat 32 and is inserted into the assembly groove 42 of the inner bottom wall of the base 31, and the rotating shaft 46 extends to the outside of the mounting seat 32 and is inserted into the slot 47 of the side wall of the base 31. At this time, the mounting seat 32 is fixed on the base 31;

[0060] When measuring the twist of the yarn, the yarn bobbin wound with the yarn is installed in the loading platform 11, the yarn end is placed in the clamping claw assembly 33 in A and clamped, the transmission gear 23 is started to rotate, and the transmission gear 23 drives the two slides 22 and the two sets of clamping mechanisms 3 to move synchronously in opposite directions. When the two slides 22 approach each other, the two bases 31 contact the two double-sided inclined plates 24 respectively, and the double-sided inclined plates 24 drive the two bases 31 to move away from each other in the front and rear directions to prevent the two bases 31 from colliding with each other. After the two slides 22 are staggered in the left and right directions, the base 31 is separated from the double-sided inclined plates 24, and the base 31 moves back to reset;

[0061] During the rightward movement of A, when the base 31 is close to the receiving end, the top of the push plate 43 contacts the pressure plate 45, and the pressure plate 45 pushes the push plate 43 to move leftward. After the push plate 43 moves leftward, it drives the assembly part 41 to move upward through the bevel plate, so that the assembly part 41 is separated from the base 31. After losing the restraint of the assembly part 41, the base 31 continues to move rightward, and the pressure plate 45 drives the push plate 43 and the mounting seat 32 to rotate, so that the mounting seat 32 rotates to the horizontal. The base 31 continues to move rightward. When the mounting seat 32 is about to contact the rotating chuck 132, the push plate 43 and The pressing plate 45 is separated, the pushing plate 43 moves to the outside of the mounting seat 32, the assembly part 41 extends to the right and is inserted into the assembly slot 42 of the rotating chuck 132, the assembly part 41 is connected with the rotating chuck 132, the annular electromagnet 49 is started and energized, and the annular electromagnet 49 repels the magnetic block 48 after being energized, pushing the magnetic block 48 and the rotating shaft 46 to move inside the mounting seat 32, so that the rotating shaft 46 is separated from the slot 47, so that the yarn end is mounted on the rotating chuck 132, and the mounting seat 32 is completely separated from the base 31;

[0062] In this process, B moves to the left side and clamps the left end of the yarn in the clamping jaw assembly 33 of B, so that both ends of the yarn are fixedly clamped;

[0063] Start the cutting mechanism 12 to cut the yarn between the yarn bobbin and B;

[0064] The machine body 131 is started, and the rotating clamp 132 drives the thread end to rotate, and the untwisting work begins until the single yarns in the strand are completely parallel, and the number of untwisted turns is measured to measure the twist of the yarn section.

[0065] After the measurement is completed, the rotary joint is reset, the annular electromagnet 49 is powered off, and the rotating shaft 46 extends outward and is inserted into the card slot;

[0066] When measuring the twist of the next section of yarn, the yarn head on the yarn bobbin is clamped on B, the transmission gear 23 is started to rotate, and the transmission gear 23 drives the two slides 22 to swap positions. B clamps the yarn head and transports it to the right. After the base 31 in A moves to the left, the push plate 43 contacts the slope on the right side of the bottom end of the pressure plate 45 and is squeezed inward. After the push plate 43 moves inward, it drives the assembly part 41 to move to the inside of the mounting seat 32, and the assembly part 41 is separated from the rotating chuck 132; after the base 31 continues to move to the left, the mounting seat 32 rotates to a vertical state and the assembly part 41 is inserted into the assembly groove 42 of the inner bottom wall of the base 31, A returns to its initial state and moves to the left to its initial position. In this way, A and B complete the position swap, and then B assembles the yarn head on the rotating chuck 132, A clamps the left end of the yarn, and the yarn twist measurement can continue.

[0067] During use, the measuring instrument provides two clamping mechanisms 3 to alternately clamp and fix the yarn ends and assemble them onto the rotating chuck 132. When the yarn ends are assembled onto the rotating chuck 132, one of the clamping mechanisms 3 only needs to perform a one-way movement. Compared with the conventional method of operating the clamping device to perform reciprocating motion, the working efficiency is improved. Moreover, only the rotation of the transmission gear 23 is controlled to automatically complete the position swapping of the two sets of clamping mechanisms 3, the position adjustment of the mounting seat 32, and the assembly switching of the mounting seat 32 between the base 31 and the rotating chuck 132, so as to perform the yarn untwisting operation. The instrument has a high degree of automation and is more convenient to operate.

[0068] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A yarn twist measuring instrument, comprising a workbench (1), on which a loading platform (11), a cutting mechanism (12) and a twist testing mechanism (13) are sequentially arranged, wherein the loading platform (11) is used to place a yarn bobbin, and is characterized in that: It also includes a motion mechanism (2) and two sets of clamping mechanisms (3), wherein the two sets of clamping mechanisms (3) are used to clamp the two ends of the yarn, and the motion mechanism (2) is used to drive the clamping mechanisms (3) to move; Wherein, the motion mechanism (2) comprises: Two slide rails (21) provided on the workbench (1); A slide seat (22) slidably arranged on the slide rail (21); Rotating a transmission gear (23) disposed on the workbench (1), so that the two slide seats (22) are respectively meshed and connected with the transmission gear (23); The clamping mechanism (3) comprises: A base (31) slidably disposed on the slide seat (22); A mounting seat (32) movably arranged on the base (31); A clamping claw assembly (33) disposed at the top end of the mounting seat (32); The twist testing mechanism (13) comprises a body (131), and a rotating chuck (132) for assembling the mounting seat (32) is provided on the body (131); The two slide seats (22) are staggered in front and back, the center of the mounting seat (32) and the center of the rotating chuck (132) are located on the same vertical plane, and after the two clamping jaw assemblies (33) clamp the two ends of the yarn, the yarn and the rotating chuck (132) are coaxial; The motion mechanism (2) further comprises: Two double-sided inclined plates (24) are arranged on the workbench (1), and slopes are arranged on both sides of the double-sided inclined plates (24). The double-sided inclined plates (24) are used to push the two bases (31) away from each other; A return spring (25) is provided on the slide seat (22) and is used to push the base (31) to move back.

2. A yarn twist measuring instrument according to claim 1, characterized in that: It also includes a clutch mechanism (4), wherein the clutch mechanism (4) includes: An assembly part (41) slidably disposed in the mounting seat (32), wherein the assembly part (41) extends to the outside of the mounting seat (32); Assembly grooves (42) are respectively provided on the base (31) and the rotating chuck (132); the assembly part (41) is inserted into the assembly groove (42) and then fixed to one of the base (31) and the rotating chuck (132).

3. A yarn twist measuring instrument according to claim 2, characterized in that: The clutch mechanism (4) further comprises: A push plate (43) slidably mounted on the mounting seat (32), wherein the push plate (43) is provided with two bevel plates, and when the push plate (43) moves, the assembly part (41) is driven to move via the bevel plates; A first spring (44) provided on the mounting seat (32) and used for pushing the push plate (43) to move toward the outside of the mounting seat (32); A pressing plate (45) is provided on the workbench (1), and the pressing plate (45) is used to push the push plate (43) to move toward the inside of the mounting seat (32).

4. A yarn twist measuring instrument according to claim 3, characterized in that: The push plate (43) and the yarn are staggered and arranged, and a slope is provided on one side of the pressure plate (45) close to the machine body (131).

5. A yarn twist measuring instrument according to claim 4, characterized in that: The clutch mechanism (4) further comprises: Two rotating shafts (46) slidably mounted on the mounting seat (32); A slot (47) is provided on the side wall of the base (31), and the rotating shaft (46) extends to the outside of the mounting seat (32) and is inserted into the slot (47).

6. A yarn twist measuring instrument according to claim 5, characterized in that: The clutch mechanism (4) further comprises: A second spring (461) disposed on the mounting seat (32) and used for pushing the rotating shaft (46) to extend outward; a magnetic block (48) disposed at the outer end of the rotating shaft (46); An annular electromagnet (49) is arranged on the workbench (1); when energized, the annular electromagnet (49) repels the magnetic block (48) and pushes the rotating shaft (46) to move toward the inside of the mounting seat (32).

7. A yarn twist measuring instrument according to claim 6, characterized in that: The axis center line of the rotating shaft (46) is located at the center of the clamping jaw assembly (33), and the top end of the push plate (43) is located above the rotating shaft (46).

8. A yarn twist measuring instrument according to claim 7, characterized in that: After the base (31) moves to the position of the rotating chuck (132), the rotating shaft (46) is located inside the annular electromagnet (49).

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