Telescopic yarn arranging device capable of adjusting density of prepreg and fiber surfaces on two sides
By designing a telescopic yarn discharge device, the width density of the prepreg is adjusted by using the telescopic driving rod and the hinge structure, and the fiber surface density is adjusted through the corner needle plate, the problem of difficult adjustment of carbon fiber distribution width and fiber surface density in the prior art is solved, and the uniform arrangement of fibers and intuitive operating status display are achieved.
Patent Information
- Application Number
- CN202420690923.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The prior art is difficult to accurately adjust the distribution width of carbon fiber and the fiber surface density on both sides of the prepreg, and it is impossible to conveniently center the yarn.
A telescopic yarn discharge device is designed, including an adjustable mounting plate and a comb steel needle, which adjusts the width density of the prepreg through a telescopic drive rod and an articulated structure, and adjusts the fiber surface density through the rotation of the corner needle plate.
Accurate adjustment of the width density of the prepreg and the fiber surface density adjustment are achieved, ensuring uniform arrangement of fibers, avoiding yarn wrapping, and providing an intuitive operating status display.
Smart Images
Figure CN222662317U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a retractable yarn arrangement device which can adjust the surface density of prepreg and fibers on both sides. Background Art
[0002] The preparation of fiber-reinforced resin-based composite materials requires that each fiber be evenly arranged and fixed through a yarn arrangement device (comb).
[0003] There are two problems encountered in the production of prepreg: 1) A specific number of carbon fibers often need to be precisely adjusted in terms of their distribution width; 2) The fiber surface density often needs to be adjusted within a certain range on both sides of the prepreg. 3) Convenient centering of the yarn. The "telescopic reed" currently on the market, also known as the universal reed, can only solve the first problem mentioned above. Summary of the invention
[0004] In view of the above problems, the purpose of the utility model is to provide a retractable yarn arrangement device which can adjust the surface density of prepreg and fibers on both sides.
[0005] In order to achieve the above purpose, the solution of the utility model is:
[0006] A telescopic yarn arrangement device capable of adjusting the surface density of prepreg and fibers on both sides, comprising a combing steel needle, a mounting plate and a mounting base placed on a frame, wherein the mounting plate is mounted on the mounting base, the combing steel needles are arranged and fixed on the mounting plate at intervals, and the combing steel needles are spaced to penetrate through the prepreg fibers, wherein: the mounting plate is composed of a plurality of mounting sub-plates hinged in sequence, the plurality of mounting sub-plates hinged in sequence are mounted on a telescopic arm, the telescopic arm comprises a plurality of driving support blocks and a telescopic driving rod arranged at intervals along a straight line, the plurality of driving support blocks are sleeved on the telescopic driving rod, the telescopic driving rod is arranged in the mounting base ... The support blocks are connected to the midpoints of the lengths of the sequentially hinged mounting panels through rotating shafts, and the telescopic driving rod adjusts the retraction and expansion of the midpoints of the lengths of the multiple mounting panels to drive the multiple mounting panels to close and expand in a straight line with the hinges between them as the rotating shafts. Corner needle plates are respectively provided on the outer sides of the mounting panels at both ends of the mounting plates through corner brackets, and comb steel needles connected to the mounting panels are arranged on the corner needle plates. The multiple mounting panels are closed and expanded in a straight line with the hinges between them as the rotating shafts to adjust the width and density of the prepreg, and the rotation of the corner needle plates adjusts the yarn density on both sides of the width of the prepreg.
[0007] The solution is further as follows: two upper and lower groups of multiple sequentially hinged connecting rods are arranged between the mounting plate and the mounting base, the upper and lower groups of multiple sequentially hinged connecting rods are hinged to each other at the midpoints of their lengths and spread out to form multiple parallelograms hinged to each other in series, the multiple driving support block rotating shafts are respectively connected to the hinge axes of the multiple parallelograms hinged to each other, the multiple mounting sub-plates are fixed on a group of multiple sequentially hinged connecting rods, the hinge axes of the hinged mounting sub-plates are coaxial with the hinge axes of a group of multiple connecting rods, and the central axis of the hinge axes of the multiple parallelograms hinged to each other in series coincides with the axis of the midpoint of the length of the mounting sub-plate.
[0008] The solution is further as follows: the telescopic drive rod is a screw with a thread, and the screw is continuously provided with multiple sections of different threads. The multiple drive support blocks are respectively provided with corresponding different threaded holes corresponding to the multiple sections of different threaded sections, and are sleeved on the multiple sections of different threaded sections. The rotating screw drives the adjacent mounting sub-plates of the mounting plate through the different threaded driving support blocks to close and expand in a straight line with the hinge between them as the rotating axis.
[0009] The solution is further as follows: the multiple mounting sub-plates are divided into two groups of front and rear mounting sub-plates with the center of the mounting plate as the dividing point, the number of the two groups of mounting sub-plates is the same, the threads of the lead screw are divided into two groups of front and rear threads, the two groups of threads correspond to the two groups of mounting sub-plates, the two groups of threads are positive and negative threads, and the different thread segments of the positive thread are mirror images of the different thread segments of the negative thread.
[0010] The solution is further as follows: both ends of the lead screw extend out of the mounting base, a rotating handle is provided at the protruding end of the lead screw, a position indicator is provided on the lead screw at the front end of the rotating handle, and the position indicator displays the closing and unfolding distances between adjacent mounting panels according to the number of rotations of the lead screw.
[0011] The scheme is further as follows: the multiple mounting sub-plates are evenly distributed on both sides with the center of the mounting plate as the dividing point and are divided into two groups of mounting sub-plates; the telescopic driving rod is a threaded screw; the screw corresponds to the two groups of mounting sub-plates and is divided into two sections of positive and negative threads with the center of the mounting plate as the dividing point; the positive threads and the negative threads are mirror images; the driving support blocks of the two groups of mounting sub-plates are sleeved on the screws through corresponding positive and negative thread nuts; each driving support block is rotated by a servo motor driven nut, and the rotating nut drives the driving support block to move; the different moving distances of the driving support blocks of each of the two groups of mounting sub-plates are controlled by the servo motor, thereby forming expansion and contraction of equal distances between each of the two groups of mounting sub-plates centered on the dividing point.
[0012] The scheme is further as follows: the number of parallelograms connected in series and hinged to each other is an odd number, a dividing rod is arranged between each group of connecting rod hinge axes of a parallelogram in the middle of the odd number of parallelograms, the dividing rod is fixed on the mounting base, the dividing rod is located in the center of the mounting plate, a guide groove is arranged on the dividing rod, each group of connecting rod hinge axes of the middle parallelogram is inserted into the guide groove and can slide up and down on the dividing rod, the multiple mounting sub-plates are equidistantly distributed on both sides with the center of the mounting plate as the dividing point and divided into two groups of mounting sub-plates, threads are respectively arranged on both ends of the telescopic drive rod, the threads on both ends are divided into positive and negative threads, the positive threads and the negative threads are mirror images, and the telescopic drive rod is between the positive threads and the negative threads. The sliding polished rod, the driving support blocks of the two outer side mounting sub-plates of the two groups of mounting sub-plates are respectively threadedly connected with the positive thread and the reverse thread of the telescopic driving rod through corresponding threaded holes, and the driving support blocks of multiple mounting sub-plates between the two outer side mounting sub-plates are respectively slidably connected with the sliding polished rod of the telescopic driving rod through through holes; the telescopic driving rod is rotated, and the threaded driving support blocks on the positive thread and the reverse thread of the telescopic driving rod respectively drive the two outer side mounting sub-plates of the two groups of mounting sub-plates to move in opposite directions, and the outer side mounting sub-plates moving in the opposite direction are driven by the parallelogram connecting rod connected in series through the driving support blocks with through holes to expand and contract at the same distance between the two groups of mounting sub-plates with the dividing point as the center.
[0013] A further solution is that the comb steel needles at one end of the corner needle plate are inserted into the mounting plate as the corner rotation axis fulcrum of the corner needle plate.
[0014] The solution is further as follows: the corner bracket includes an angle adjustment link and a support plate, the support plate is connected to the mounting plate and is arranged under the mounting plate and moves synchronously with the mounting plate, the corner needle plate is connected and fixed to the angle adjustment link, one end of the angle adjustment link is connected to the support plate through a rotatable pin shaft, a limited arc groove is provided on the support plate, the other end of the angle adjustment link is connected with a threaded fastening knob shaft, the fastening knob shaft is inserted into the limited arc groove and locked by a nut, and when the corner needle plate needs to be adjusted, the nut is loosened and the angle adjustment link is rotated in the limited arc groove.
[0015] A further solution is that a scale ruler is attached to the upper surface of the mounting base.
[0016] The beneficial effects of the utility model are:
[0017] 1) This device can effectively control the yarn arrangement width within the process index, and through the evenly distributed steel needle diversion, it can not only ensure the uniformity of yarn arrangement, but also prevent the yarn from being entangled.
[0018] 2) A ruler and a digital counter are added to intuitively know the working status.
[0019] 3) Both sides are designed with rotatable adjustment structures, which can effectively solve the problem of uneven yarn weight on both sides through adjustment.
[0020] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the structural axial side of the utility model;
[0022] Figure 2 It is a front structural schematic diagram of the utility model;
[0023] Figure 3 It is a schematic diagram of the structure of the utility model from top view;
[0024] Figure 4 This is a schematic diagram of the screw drive structure of the utility model. Figure 3 AA section view. DETAILED DESCRIPTION
[0025] A retractable yarn arrangement device capable of adjusting the prepreg and the fiber surface density on both sides is a retractable yarn arrangement device for 1000mm width PS-1000 or 1300mm width PS-1270, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the retractable yarn arrangement device includes a comb steel needle 1, a mounting plate 2 and a mounting base 3 placed on a frame, the mounting plate 2 is mounted on the mounting base 3, the comb steel needles 1 are arranged at intervals and fixed on the mounting plate 2, the comb steel needle intervals are used to penetrate through the prepreg fibers, and a scale ruler 202 is attached to the upper surface of the mounting base; wherein, the mounting plate 2 is composed of a plurality of mounting sub-plates 201 hinged in sequence, and the plurality of mounting sub-plates hinged in sequence are mounted on a retractable arm, the retractable arm includes a plurality of driving support blocks 401 and a telescopic driving rod 4 arranged at intervals along a straight line, the plurality of driving support blocks are sleeved on the telescopic driving rod 4, the telescopic driving rod 4 is arranged in the mounting base 3, the plurality of driving support blocks 401 are respectively rotatably connected with the length midpoint 201-1 of the sequentially hinged mounting sub-plates 201 by means of a rotating shaft insertion, The telescopic driving rod adjusts the retraction and expansion of the midpoints of the lengths of the multiple mounting sub-plates to drive the support blocks 401 to drive the multiple mounting sub-plates 201 to close and expand in a straight line with the hinge 101 between the mounting sub-plates 201 as the rotation axis. Corner needle plates 6 are respectively arranged on the outer sides of the mounting sub-plates 201 at both ends of the mounting plate 2 through corner brackets 5. Comb steel needles 1 connected to the mounting sub-plates are arranged on the corner needle plates 6. The multiple mounting sub-plates 201 close and expand in a straight line with the hinge 101 between them as the rotation axis to adjust the width density of the prepreg, and the rotation of the corner needle plates 6 adjusts the yarn density on both sides of the width of the prepreg; wherein, the comb steel needle 1 at one end of the corner needle plate 6 is inserted into the mounting sub-plate 201 as the corner rotation axis fulcrum of the corner needle plate; wherein: the length of the corner needle plate 6 is 2%-5% of the width of the prepreg.
[0026] During the adjustment process, the mounting plate 2 is a force-bearing plate. In order to stabilize the adjustment, the mounting plate 2 needs to be stabilized. Therefore: two groups of upper and lower multiple sequentially hinged connecting rods 7 and 8 are arranged between the mounting plate 2 and the mounting base 3. The midpoint a of the length of the upper and lower two groups of multiple sequentially hinged connecting rods 7 and 8 is hinged to each other, and then unfolded with the point a where the two groups of connecting rods 7 and 8 are hinged as the center. The upper and lower two groups of multiple sequentially hinged connecting rods 7 and 8 form multiple parallelograms 9 that are hinged in series. The rotating shafts of the multiple driving support blocks 401 are connected through hinge shafts that are respectively hinged to the multiple parallelograms. The multiple mounting sub-plates 201 are fixed on a group of multiple sequentially hinged connecting rods. The hinge shaft of the hinge 101 between the multiple mounting sub-plates is coaxial with the hinge shaft of a group of multiple connecting rods. The central axis of the hinge shaft of the multiple parallelograms hinged in series (the midpoint a of the length of the connecting rods 7 and 8) coincides with the axis of the midpoint of the length of the mounting sub-plate.
[0027] Among them, the adjustment of multiple driving support blocks can be driven and adjusted by a connecting rod. In this embodiment, as a preference: the telescopic driving rod 4 is a threaded screw 402, and the adjustment of the retraction and expansion of multiple driving support blocks is carried out by the screw 402. The screw 402 is continuously provided with multiple sections of threads with different axial diameters or different threads 402-1, 402-2..., and the multiple driving support blocks 401 are respectively provided with corresponding different threaded holes corresponding to the multiple sections of threads with different axial diameters or different threaded sections, which are sleeved on the multiple sections of threads with different axial diameters or different threaded sections. The rotating screw drives the adjacent mounting sub-plates of the mounting plate to close and expand in a straight line with the hinge between the adjacent mounting sub-plates as the rotating axis. The purpose of setting threads with different shaft diameters or different threads is to make the closing and expanding distances between all adjacent mounting sub-plates of the mounting plate consistent. For example, the shaft diameter of the starting thread segment is larger than the shaft diameter of the next thread segment or the pitch of the starting thread segment is larger than the pitch of the next thread segment. The pitch of each segment is calculated and so on to ensure that the closing and expanding distances between all adjacent mounting sub-plates of the mounting plate are consistent when the lead screw is rotated.
[0028] In order to achieve the expansion and contraction of the two groups of installation sub-boards with equal distances centered on the dividing point: there are three preferred solutions:
[0029] The first type: the multiple mounting sub-plates 201 are divided into two groups of front and rear mounting sub-plates with the center of the mounting plate as the dividing point, and the number of the two groups of mounting sub-plates is the same. The thread of the lead screw 402 is divided into two groups of front and rear threads of equal length. The two groups of threads correspond to the two groups of mounting sub-plates. The two groups of threads are positive and negative threads, and different thread segments of the positive thread are mirror images of different thread segments of the negative thread. Here, it is required that the number of the multiple mounting sub-plates must be an even number, because only when it is an even number can the number of the two groups of mounting sub-plates be the same.
[0030] Among them: the control of the rotation of the screw rod 402 can be controlled by a servo stepper motor, and the other is manual control, that is: the two ends of the screw rod 402 extend out of the mounting base 3, and a rotating handle 10 is provided at the protruding end of the screw rod 402, and a position display 11 is provided on the screw at the front end of the rotating handle 10, and the position display 11 is sleeved on the screw end shaft. The inner hole of the position display 11 has at least two ranging sensing points at different positions on the circumference, and a sensing mark is provided on the screw shaft relative to the ranging sensing point. The position display 11 determines the rotation direction of the screw rod according to the sensing sequence of the front and rear sensing marks, and determines the number of rotations according to the number of times the counting sensing mark appears. The distance that the driving support block 401 moves can be calculated based on the known pitch. Therefore, the position display 11 displays the closing and unfolding distance between adjacent mounting sub-plates 201 by sensing the number of rotations of the screw rod 402.
[0031] The second type: the multiple mounting sub-plates 201 are evenly distributed on both sides with the center of the mounting plate as the dividing point to form two groups of mounting sub-plates. The telescopic driving rod 4 is a threaded screw 402. The screw 402 corresponds to the two groups of mounting sub-plates and is divided into two sections of positive and negative threads with the center of the mounting plate as the dividing point. The positive thread and the negative thread are mirror images. The driving support blocks of the two groups of mounting sub-plates are sleeved on the screw 402 by setting corresponding positive and negative thread nuts on the driving support blocks. Each driving support block 401 is rotated by a servo motor driving nut set on the driving support block. The rotating nut drives the driving support block 401 to move. The different moving distances of the driving support blocks 401 of each group of mounting sub-plates are controlled by the servo motor, so that the two groups of mounting sub-plates are expanded and contracted at equal distances with the dividing point as the center.
[0032] The third type: the plurality of parallelograms 9 connected in series and hinged to each other is an odd number, and a dividing rod 901 is arranged between each group of connecting rod hinge axes of a parallelogram in the middle of the odd number of parallelograms, the dividing rod 901 is fixed on the mounting base 3, the dividing rod is in the center of the mounting plate, a guide groove 901-1 is arranged on the dividing rod, each group of connecting rod hinge axes of the middle parallelogram 9 is inserted into the guide groove 901-1 and can slide up and down on the dividing rod 901, the plurality of mounting sub-plates 201 are equidistantly distributed on both sides with the center of the mounting plate as the dividing point and divided into two groups of mounting sub-plates, the telescopic drive rod 4 is respectively provided with threads on both ends, the threads on both ends are divided into positive and negative threads, the positive threads and the negative threads are mirror images, and the telescopic drive rod 4 has positive threads and negative threads. There is a sliding polished rod between the reverse threads, and the driving support blocks 401 of the two outer side mounting sub-plates 201 of the two groups of mounting sub-plates are respectively threadedly connected with the positive thread and reverse thread of the telescopic driving rod 4 through corresponding threaded holes, and the driving support blocks 401 of multiple mounting sub-plates between the two outer side mounting sub-plates are respectively slidably connected with the sliding polished rod of the telescopic driving rod 4 through through holes; the telescopic driving rod 4 is rotated, and the threaded driving support blocks on the positive thread and reverse thread of the telescopic driving rod 4 respectively drive the two outer side mounting sub-plates of the two groups of mounting sub-plates to move in opposite directions, and the outer side mounting sub-plates moving in the opposite direction are driven by the parallelogram connecting rods connected in series through the driving support blocks with through holes to expand and contract at equal distances between the two groups of mounting sub-plates with the dividing point as the center.
[0033] In the embodiment: the corner bracket 5 includes a corner adjustment link 501 and a support plate 502, the support plate 502 is connected to the mounting sub-plate 201 and is arranged under the mounting sub-plate 201 and moves synchronously with the mounting sub-plate 201, the corner needle plate 6 is connected and fixed to the corner adjustment link 501, one end of the angle adjustment link 501 is connected to the support plate 502 through a rotatable pin shaft, a limited arc groove 503 is provided on the support plate 502, the other end of the angle adjustment link is connected with a threaded fastening knob shaft 504, the fastening knob shaft 504 is inserted into the limited arc groove and locked by a nut, when the corner needle plate needs to be adjusted, the nut is loosened and the angle adjustment link 501 is rotated in the limited arc groove 503.
[0034] The above-mentioned retractable yarn arrangement device that can adjust the prepreg and the fiber surface density on both sides adopts a symmetrical folding design, which allows the screw to rotate and drive the connecting rod to extend and retract to achieve the requirements of controlling the width and density. The hand wheel is shaken to control the screw rotation, that is, to make the ball screw support seat move forward or backward, and the overall width or narrowness can be achieved by controlling the pitch of the screw at different positions.
[0035] The design uses a position display and a scale to display real-time adjustment data, so that users can clearly know the current working status of the device and accurately locate the yarn position.
[0036] The first connecting rods at both ends are designed as adjustable connecting rods (corner needle plate 6). By adding a guide groove connecting rod, the adjusting connecting rod can be adjusted left and right by ±5° in the horizontal direction (the length range of the single-sided adjustable rod is 2%-5% of the total width), which is convenient for fine-tuning the gap width on both sides and in the middle to meet the process needs.
[0037] In the embodiment, the mounting plate 2 is installed on the mounting base, and a rotating screw is adjusted internally. The shaft diameter and thread of the screw are different at different positions, which is convenient for installing different drive support blocks. At the same time, different pitches are processed to control the different displacements of each connecting rod fixedly connected to the drive support block when the screw rotates to ensure the same spacing between the steel needles.
[0038] The mounting plate 2 of the comb steel needle 1, except for the corner needle plates 6 at both ends, uses a universal mounting plate 201, the mounting plate 201 is fixed to the support seat with screws, and the mounting plate 201 is connected to the corner needle plate 6 with a hinge pin. The mounting plate 201 is fixed with a mounting reed, and the comb steel needle 1 is inserted into the corresponding hole.
[0039] The two end corner needle plates 6 add an adjustment link on the guide groove link, one end of the adjustment link is fixed on the guide groove link with a hinge pin, and the other end is fixed in the guide groove with a fastening nut and a fastening knob. Two types of steel needle mounting plates are used here, the middle one is adjusted with the whole, and the short one can be fine-tuned by the fastening knob.
Claims
1. A retractable yarn arrangement device capable of adjusting the surface density of prepreg and fibers on both sides, comprising a comb steel needle, a mounting plate and a mounting base placed on a frame, the mounting plate being mounted on the mounting base, the comb steel needles being arranged at intervals and fixed on the mounting plate, the comb steel needles being spaced apart for penetrating through the prepreg fibers, characterized in that: The mounting plate is composed of a plurality of mounting sub-plates hinged in sequence, and the plurality of mounting sub-plates hinged in sequence are mounted on a telescopic arm, the telescopic arm comprising a plurality of driving support blocks and a telescopic driving rod arranged at intervals along a straight line, the plurality of driving support blocks being sleeved on the telescopic driving rod, and the telescopic driving rod being arranged in a mounting base, the plurality of driving support blocks being respectively connected to the midpoints of the length of the mounting sub-plates hinged in sequence through rotating shafts, the telescopic driving rod adjusting the retraction and expansion between the driving support blocks connected at the midpoints of the length of the plurality of mounting sub-plates to drive the plurality of mounting sub-plates to close and expand in a straight line with the hinge between them as the rotating shaft, corner needle plates are respectively arranged on the outer sides of the mounting sub-plates at both ends of the mounting plate through corner brackets, and comb steel needles connected to the mounting sub-plates are arranged on the corner needle plates, the plurality of mounting sub-plates are closed and expanded in a straight line with the hinge between them as the rotating shaft to adjust the density of the width of the prepreg, and the rotation of the corner needle plates adjusts the density of the yarns on both sides of the width of the prepreg.
2. The retractable yarn arrangement device according to claim 1, characterized in that: Two upper and lower groups of multiple sequentially hinged connecting rods are arranged between the mounting plate and the mounting base. The midpoints of the lengths of the upper and lower groups of multiple sequentially hinged connecting rods are hinged to each other and expanded to form multiple parallelograms hinged in series. The multiple driving support block rotating shafts are respectively connected to the hinge axes of the multiple parallelograms hinged to each other. The multiple mounting sub-plates are fixed on a group of multiple sequentially hinged connecting rods. The hinge axes of the hinged mounting sub-plates are coaxial with the hinge axes of a group of multiple connecting rods. The central axes of the hinge axes of the multiple parallelograms hinged in series coincide with the axes of the midpoints of the lengths of the mounting sub-plates.
3. The retractable yarn arrangement device according to claim 1, characterized in that: The telescopic driving rod is a screw with a thread, and the screw is continuously provided with multiple sections of different threads. The multiple driving support blocks are respectively provided with corresponding different threaded holes corresponding to the multiple sections of different threaded sections, and are sleeved on the multiple sections of different threaded sections. The rotating screw drives the adjacent mounting sub-plates of the mounting plate through the different threaded driving support blocks, and the linear closing and unfolding with the hinge between them as the rotating axis.
4. The retractable yarn arrangement device according to claim 3, characterized in that: The multiple mounting sub-plates are divided into two groups of front and rear mounting sub-plates with the center of the mounting plate as the dividing point, and the number of the two groups of mounting sub-plates is the same. The threads of the lead screw are divided into two groups of front and rear threads, and the two groups of threads correspond to the two groups of mounting sub-plates. The two groups of threads are positive and negative threads, and different thread segments of the positive thread are mirror images of different thread segments of the negative thread.
5. The retractable yarn arrangement device according to claim 3, characterized in that: The two ends of the lead screw extend out of the mounting base, a rotating handle is provided at the protruding end of the lead screw, and a position indicator is provided on the lead screw at the front end of the rotating handle. The position indicator displays the closing and unfolding distances between adjacent mounting sub-plates according to the number of rotations of the lead screw.
6. The retractable yarn arrangement device according to claim 1 or 2, characterized in that: The multiple mounting sub-plates are evenly distributed on both sides with the center of the mounting plate as the dividing point to form two groups of mounting sub-plates. The telescopic driving rod is a threaded screw. The screw corresponds to the two groups of mounting sub-plates and is divided into two sections of positive and negative threads with the center of the mounting plate as the dividing point. The positive threads and the negative threads are mirror images. The driving support blocks of the two groups of mounting sub-plates are sleeved on the screws through corresponding positive and negative thread nuts. Each driving support block is rotated by a servo motor driving nut, and the rotating nut drives the driving support block to move. The different moving distances of the driving support blocks of each of the two groups of mounting sub-plates are controlled by the servo motor, so that the two groups of mounting sub-plates with the same distance of expansion and contraction are formed with the dividing point as the center.
7. The retractable yarn arrangement device according to claim 2, characterized in that: The plurality of parallelograms connected in series and hinged to each other are an odd number, a dividing rod is arranged between each group of connecting rod hinge axes of a parallelogram in the middle of the odd number of parallelograms, the dividing rod is fixed on the mounting base, the dividing rod is located in the center of the mounting plate, a guide groove is arranged on the dividing rod, each group of connecting rod hinge axes of the middle parallelogram is inserted into the guide groove and can slide up and down on the dividing rod, the plurality of mounting sub-plates are equidistantly distributed to both sides with the center of the mounting plate as the dividing point and divided into two groups of mounting sub-plates, threads are respectively arranged on both ends of the telescopic drive rod, the threads on both ends are divided into positive and negative threads, the positive threads and the negative threads are mirror images, and the telescopic drive rod is a sliding light between the positive threads and the negative threads. Rod, the driving support blocks of the two outer side mounting sub-plates of the two groups of mounting sub-plates are respectively threadedly connected with the positive thread and the reverse thread of the telescopic driving rod through corresponding threaded holes, and the driving support blocks of multiple mounting sub-plates between the two outer side mounting sub-plates are respectively slidably connected with the sliding smooth rod of the telescopic driving rod through through holes; the telescopic driving rod is rotated, and the threaded driving support blocks on the positive thread and the reverse thread of the telescopic driving rod respectively drive the two outer side mounting sub-plates of the two groups of mounting sub-plates to move in opposite directions, and the outer side mounting sub-plates moving in the opposite direction are driven by the parallelogram connecting rod connected in series through the driving support blocks with through holes to expand and contract at the same distance between the two groups of mounting sub-plates with the dividing point as the center.
8. The retractable yarn arrangement device according to claim 1, characterized in that: The comb steel needles at one end of the corner needle plate are inserted into the mounting plate as the corner rotation axis fulcrum of the corner needle plate.
9. The retractable yarn arrangement device according to claim 1, characterized in that: The corner bracket includes an angle adjustment link and a support plate, the support plate is connected to the mounting plate and is arranged under the mounting plate and moves synchronously with the mounting plate, the corner needle plate is connected and fixed to the angle adjustment link, one end of the angle adjustment link is connected to the support plate through a rotatable pin shaft, a limited arc groove is arranged on the support plate, and the other end of the angle adjustment link is connected with a threaded fastening knob shaft, the fastening knob shaft is inserted into the limited arc groove and locked by a nut, and when the angle needle plate needs to be adjusted, the nut is loosened and the angle adjustment link is rotated in the limited arc groove.
10. The retractable yarn arrangement device according to claim 1, characterized in that: A scale ruler is attached to the upper surface of the mounting base.