Computerized flat knitting machine cutting device for high-performance special yarns

Abstract

The application relates to a computerized flat knitting machine shearing device applied to high-performance special yarns, and relates to the field of flat knitting machines. The shearing device is characterized in that a shearing assembly, a thread clamping assembly and a transmission assembly are mounted on a cover plate, the shearing assembly and the thread clamping assembly are transmissionally connected through the transmission assembly, the shearing of high-performance special yarns such as ultra-high molecular weight polyethylene yarns with high strength and easy-to-disperse filaments is realized, and the problem of entanglement caused by incomplete shearing of the yarns is solved. In addition, the computerized flat knitting machine shearing device applied to high-performance special yarns has the advantages of simple structure, easy production, adaptation to other device components of the computerized flat knitting machine, convenient replacement, easy operation, facilitation to the production of high-performance special yarns related products, reduction of the service life of the computerized flat knitting machine and improvement of the production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of knitting flat knitting machines, and in particular to a shearing device for a computerized flat knitting machine used for high-performance special yarns. Background Art

[0002] With the development of science and technology and the improvement of people's awareness of protection, personal protective equipment, especially flexible textiles, has become a hot topic in both military and civilian use. High-performance specialty yarns such as ultra-high molecular weight polyethylene, carbon fiber, aramid fiber, metal wire, etc. have excellent properties such as light weight, high strength, impact resistance, and cut resistance. The production of high-performance specialty yarns is increasing day by day, so they are widely used in lightweight flexible protective equipment. Combined with the soft and comfortable characteristics brought by knitting technology, there have been many studies on the use of computer flat knitting machines to weave high-performance specialty yarns to prepare flexible protective equipment. However, due to the high strength, easy static electricity, and easy unraveling of yarn monofilaments of high-performance specialty yarns such as ultra-high molecular weight polyethylene yarns, many problems are prone to occur when weaving on computer flat knitting machines, such as yarn entanglement during weaving and difficulty in cutting, which will damage the performance of the flat knitting machine.

[0003] At present, there are many research and developments on the shearing devices of computerized flat knitting machines, mainly focusing on the yarn scissor devices, shearing and yarn clamping combination devices of flat knitting machines, such as:

[0004] Patent CN216107465U provides a computerized flat knitting machine yarn shearing and clamping combination device, comprising: a cover plate; a rotating pin connected to one side of the cover plate, a washer provided on the surface of the rotating pin, a bearing seat provided on the surface of the washer, a wire pressing device provided at one end of the rotating pin, a plurality of gear fixing members provided on one side of the cover plate, a plurality of gears provided on one side of the plurality of gear fixing members, a plurality of hooks provided on the surface of the cover plate, and a plurality of cutters provided on the surface of the cover plate. The utility model provides a computerized flat knitting machine yarn shearing and clamping combination device, wherein a small station motor is provided on the surface of the wire pressing motor mounting plate on one side of the cover plate, and is used in conjunction with a first pulley and a second pulley to drive the wire pressing rod connecting seat and the wire pressing plate by the rotating pin to adjust the angle of the yarn, and to facilitate the cutter to shear and clamp the yarn when the gear and hook pull the yarn, thereby improving the usability of the shearing and clamping device. The shearing device of this patent is similar to the yarn shearing and clamping device of the Stoll computer flat knitting machine. It can clamp the yarn while cutting general yarns, but its shearing rate is not high for strong yarns, and there is also the risk that the yarn filaments will spread out and cannot be cut together and become entangled.

[0005] Patent CN215925242U discloses a scissor clamp for a flat knitting machine, comprising a frame on which a thread pressing assembly, a scissor assembly, and a hook assembly are arranged, with the scissor assembly located between the thread pressing assembly and the hook assembly. The thread pressing assembly is used to press down and compact the yarn, the hook assembly is used to hook and pull the yarn, and the scissor assembly is used to cut the yarn. The thread pressing assembly, the scissor assembly, and the hook assembly are each controlled by an independent drive device. The scissor clamp has a yarn pressing function, which improves the success rate of the hook assembly in hooking the yarn and the yarn cutting rate. The scissors of this device can encircle the yarn during use, which can solve the problem of easily loose yarns that cannot be completely cut. However, it cannot cut strong and cut-resistant yarns, such as ultra-high molecular weight polyethylene yarns and aramid.

[0006] Therefore, with the continuous development and application of specialized protective fabrics, it is necessary to consider suitable cutting devices based on the characteristics of high-performance specialty yarns to reduce the loss rate of computerized flat knitting machines and improve production efficiency. Therefore, the research and development of a device suitable for cutting high-performance specialty yarns when used on flat knitting machines, which is easy to install and disassemble, and convenient to operate, is of great value and significance. Summary of the Invention

[0007] The purpose of this application is to provide a computerized flat knitting machine shearing device for high-performance special yarns to solve the problems existing in the above-mentioned prior art.

[0008] To achieve the above objectives, the technical solutions adopted in this application are:

[0009] In a first aspect, the present application provides a computerized flat knitting machine shearing device for high-performance specialty yarns, comprising a cover plate for connection to the computerized flat knitting machine, and a shearing assembly, a wire clamping assembly, and a transmission assembly mounted on the cover plate via a fixing assembly, wherein the wire clamping assembly is located on one side of the shearing assembly, and the shearing assembly and the wire clamping assembly are connected to each other via the transmission assembly;

[0010] The shearing assembly includes a concave-shaped shearing block mounted on the fixed assembly, the middle portion of the shearing block having a through groove, the through groove being slidably connected to the shearing end of the upper portion of the shearing blade, the lower portion of the shearing blade having a needle butt, the needle butt being transmission-connected to the needle selector of the computerized flat knitting machine, the middle portion of the shearing blade having a tooth groove, the tooth groove being transmission-connected to the transmission assembly;

[0011] The wire clamping assembly includes a clip mounted on the fixing assembly, the tail end of which is equipped with a spring for driving the clip to open and close, and the middle portion of the spring is connected to the transmission assembly;

[0012] When the shearing blade is not in a shearing state, the transmission assembly drives the clamping end of the clamp to expand; when the shearing blade is in a shearing state, the transmission assembly drives the clamping end of the clamp to close.

[0013] In one possible implementation, the shear blade is in the shape of an elongated strip, the shear end is in the shape of a hook, the shear end has a smooth side away from the wire clamping assembly and a shear side close to the wire clamping assembly, and the shear side has a vertical serrated edge.

[0014] In a possible implementation, a longitudinal groove is provided on a side of the through groove opposite to the shearing side, and a transverse groove is provided on a side of the through groove opposite to the smooth side.

[0015] In a possible implementation, the fixing assembly includes a first fixing rod and a second fixing rod, wherein the first end of the first fixing rod and the second fixing rod are respectively fixedly connected to the cover plate via a first bolt, and the second end of the first fixing rod and the second fixing rod are respectively fixedly connected to the shear block via a second bolt;

[0016] The fixing assembly further includes a third fixing rod, a first end of the third fixing rod is fixedly connected to the cover plate, and a second end of the third fixing rod is fixedly connected to the tail end of the clip via a third bolt.

[0017] In one possible implementation, the transmission assembly includes:

[0018] a first gear rotatably connected to the second fixing rod;

[0019] a second gear rotatably connected to the third fixing rod; and

[0020] a pull rod having a first end hingedly connected to the second gear and a second end hingedly connected to a middle portion of the spring;

[0021] Wherein, one side of the first gear is transmission connected to the tooth groove, and the other side is transmission connected to the second gear.

[0022] In a possible implementation, the first end of the pull rod is located at one quarter of the radial direction of the second gear.

[0023] In a possible implementation, the length of the tooth groove is greater than the circumference of the first gear.

[0024] In a possible implementation, the clamping surface of the clamping end of the clamp has a crocodile tooth-like groove.

[0025] In a possible implementation, the computerized flat knitting machine shearing device for high-performance special yarns is installed below the yarn mouth of the computerized flat knitting machine.

[0026] In a second aspect, the present application provides a computer flat knitting machine comprising at least one set of computer flat knitting machine shearing devices as described above for use with high-performance specialty yarns.

[0027] The beneficial effects of the technical solution provided by this application include at least:

[0028] By installing a shearing assembly, a wire clamping assembly, and a transmission assembly on the cover plate, and connecting the shearing assembly and the wire clamping assembly via the transmission assembly, it is possible to shear high-performance specialty yarns such as ultra-high molecular weight polyethylene yarns, which are high in strength and easily dispersed in single filaments, and solve the problem of entanglement caused by incomplete yarn shearing. In addition, the computerized flat knitting machine shearing device for high-performance specialty yarns has a simple structure, is easy to produce, and is compatible with other device components of the computerized flat knitting machine, making it easy to replace and operate. This is conducive to the production of high-performance specialty yarn-related products, reduces the wear life of the computerized flat knitting machine, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0030] Figure 1 A schematic structural diagram of a computerized flat knitting machine shearing device for high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0031] Figure 2 A partial structural schematic diagram of a shearing blade of a computerized flat knitting machine shearing device applied to high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0032] Figure 3 A schematic structural diagram of a shearing blade of a computerized flat knitting machine shearing device applied to high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0033] Figure 4 A schematic structural diagram of a shearing block of a computerized flat knitting machine shearing device for high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0034] Figure 5 A schematic diagram of the connection structure of a wire clamping assembly and a transmission assembly of a shearing device for a computerized flat knitting machine for high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0035] Figure 6 A schematic diagram showing the working principle of a transmission assembly of a shearing device of a computerized flat knitting machine for high-performance specialty yarns provided by an exemplary embodiment of the present application is shown;

[0036] In the picture:

[0037] 1. Cover plate; 2. Fixing assembly; 3. Shearing assembly; 4. Wire clamping assembly; 5. Transmission assembly; 6. Yarn nozzle; 7. Ultra-high molecular weight polyethylene yarn;

[0038] 21. First fixing rod; 22. Second fixing rod; 23. First bolt; 24. Third fixing rod; 25. Third bolt;

[0039] 31. Shear block; 32. Shear blade;

[0040] 311, through groove; 312, second bolt; 321, shear end; 322, needle butt; 323, tooth groove;

[0041] 3111, longitudinal groove; 3112, transverse groove; 3211, smooth side; 3212, shear side; 3213, knife edge;

[0042] 41. Clip; 411. Alligator tooth groove; 42. Spring;

[0043] 51. First gear; 52. Second gear; 53. Pull rod. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application specification, and the words "bottom" and "top", "inside" and "outside" refer to directions toward or away from specific parts, respectively. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application specification, the meaning of "multiple" is two or more.

[0046] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0047] It is worth noting that the computerized flat knitting machine shearing device for high-performance specialty yarns provided in this application is suitable for computerized flat knitting machines. Multiple devices can be installed side by side on the computerized flat knitting machine and operate normally, facilitating the weaving of high-performance specialty yarns on the computerized flat knitting machine. Furthermore, the computerized flat knitting machine model involved in the embodiments of this application is the STOLL-CMS-530, and the high-performance specialty yarn involved is ultra-high molecular weight polyethylene yarn.

[0048] Figure 1 A structural schematic diagram of a computer flat knitting machine shearing device for high-performance special yarns provided by an exemplary embodiment of the present application is shown. The shearing device includes a cover plate 1 for connecting to the computer flat knitting machine and a shearing assembly 3, a wire clamping assembly 4 and a transmission assembly 5 installed on the cover plate 1 through a fixing assembly 2. The wire clamping assembly 4 is located on one side of the shearing assembly 3, and the shearing assembly 3 and the wire clamping assembly 4 are connected through the transmission assembly 5.

[0049] In the embodiment of the present application, the cover plate 1 integrates the shearing assembly 3, the wire clamping assembly 4, and the transmission assembly 5 through the fixing assembly 2. Optionally, multiple shearing devices consisting of the fixing assembly 2, the shearing assembly 3, the wire clamping assembly 4, and the transmission assembly 5 can be installed on the cover plate 1 and installed at both ends of the computerized flat knitting machine to operate.

[0050] In the embodiment of the present application, the computer flat knitting machine shearing device for high-performance special yarns is installed below the yarn mouth 6 on the computer flat knitting machine, so the yarn mouth 6 will not collide with the shearing component 3 and the wire clamping component 4 during movement.

[0051] For more details, see Figures 1 to 5 The shearing assembly 3 includes a concave-shaped shearing block 31 installed on the fixed assembly 2, and the middle part of the shearing block 31 has a through groove 311, which is slidably connected to the shearing end 321 on the upper part of the shearing blade 32. The lower part of the shearing blade 32 has a needle butt 322, and the needle butt 322 is transmission-connected to the needle selector of the computer flat knitting machine. The middle part of the shearing blade 32 has a tooth groove 323, and the tooth groove 323 is transmission-connected to the transmission assembly 5; the thread clamping assembly 4 includes a clip 41 installed on the fixed assembly 2, and the tail end of the clip 41 is installed with a spring 42 for driving the clip 41 to open and close, and the middle part of the spring 42 is connected to the transmission assembly 5; when the shearing blade 32 is not in the shearing state, the transmission assembly 5 drives the clamping end of the clip 41 to expand; when the shearing blade 32 is in the shearing state, the transmission assembly 5 drives the clamping end of the clip 41 to close.

[0052] In the embodiment of the present application, the clamp 41 is opened and closed by the stretching of the spring 42. The clamping surface of the clamping end of the clamp 41 has an crocodile tooth groove 411, which is convenient for clamping the ultra-high molecular weight polyethylene yarn 7 with a smooth surface to prevent slipping. The wire clamping assembly 4 serves as an auxiliary component to strengthen the clamping of the cut yarn during operation.

[0053] In the embodiment of the present application, the needle butt 322 is connected to the needle selector of the computer flat knitting machine in a transmission manner. Specifically, the lower end of the needle butt 322 is connected to the middle knitting needle of the computer flat knitting machine, the lower end of the middle knitting needle butt is connected to the combined knitting needle, the combined knitting needle butt is connected to the needle selector in a transmission manner, the needle selector is connected to the head triangle in a transmission manner, and the head triangle is driven by a motor, thereby causing the shear blade 32 to move up and down.

[0054] In the embodiment of the present application, the through groove 311 is used to guide the lifting movement of the shear blade 32. The shear blade 32 moves downward under the drive of the needle selector and moves relative to the shear block 31 to form a shearing movement.

[0055] In the embodiment of the present application, the shear block 31 is a square when viewed from the side, and an inverted trapezoidal notch when viewed from the front.

[0056] For further information, see Figures 1 to 4 The shearing blade 32 is long and has a hook-shaped shearing end 321 for hooking the yarn and pulling it downward. The shearing end 321 has a smooth side 3211 away from the thread clamping assembly 4 and a shearing side 3212 close to the thread clamping assembly 4. The shearing side 3212 has a vertical serrated blade 3213. The through groove 311 has a longitudinal groove 3111 on the side opposite the shearing side 3212, and a transverse groove 3112 on the side opposite the smooth side 3211.

[0057] In the embodiment of the present application, the vertical serrated edge 3213 of the shearing side 3212 is larger and deeper than the longitudinal grooves 3111 and transverse grooves 3112; whereas the longitudinal grooves 3111 and transverse grooves 3112 are shallow, small, and smooth. The arrangement of the longitudinal grooves 3111 and transverse grooves 3112, combined with the smooth side 3211 and shearing side 3212 of the shearing end 321, allows the smooth side 3211 to not cut the yarn but to clamp and hold it, while the shearing side 3212 can cut the yarn. The yarn described above is a high-strength ultra-high molecular weight polyethylene yarn 7.

[0058] Specifically, see Figure 1 The fixing assembly 2 includes a first fixing rod 21 and a second fixing rod 22. The first ends of the first fixing rod 21 and the second fixing rod 22 are fixedly connected to the cover plate 1 through a first bolt 23 respectively, and the second ends of the first fixing rod 21 and the second fixing rod 22 are fixedly connected to the shear block 31 through a second bolt 312 respectively; the fixing assembly 2 also includes a third fixing rod 24. The first end of the third fixing rod 24 is also fixedly connected to the cover plate 1 through a bolt, and the second end of the third fixing rod 24 is fixedly connected to the tail end of the clip 41 through a third bolt 25.

[0059] In the embodiment of the present application, the end of the third fixing rod 24 fixedly connected to the tail end of the clip 41 is inclined at an angle of approximately 10° toward the direction of the clip 41, so as to ensure that the clip 41 and the ultra-high molecular weight polyethylene yarn 7 are in a nearly vertical state, so that the ultra-high molecular weight polyethylene yarn 7 is completely clamped by the clip 41.

[0060] For further information, see Figure 1 The transmission assembly 5 includes a first gear 51 rotatably connected to the second fixed rod 22, a second gear 52 rotatably connected to the third fixed rod 24, and a pull rod 53 whose first end is hinged to the second gear 52 and whose second end is hinged to the middle part of the spring 42; wherein, one side of the first gear 51 is transmission connected to the tooth groove 323, and the other side is transmission connected to the second gear 52.

[0061] In the embodiment of the present application, the pull rod 53 is used to pull the spring 42 up and down, and the first end of the pull rod 53 is located at one quarter of the radial direction of the second gear 52.

[0062] In the embodiment of the present application, the length of the tooth groove 323 is greater than the circumference of the first gear 51 .

[0063] In summary, the present application achieves the shearing of high-performance specialty yarns such as ultra-high molecular weight polyethylene yarns, which are high in strength and easily dispersed in monofilaments, by installing a shearing assembly, a wire clamping assembly, and a transmission assembly on the cover plate, and the shearing assembly and the wire clamping assembly are connected by the transmission assembly, thereby solving the problem of entanglement caused by incomplete shearing of the yarns. In addition, the computer flat knitting machine shearing device applied to high-performance specialty yarns has a simple structure, is easy to produce, and is compatible with other device components of the computer flat knitting machine. It is easy to replace and easy to operate, which is beneficial to the production of high-performance specialty yarn-related products, reduces the loss life of the computer flat knitting machine, and improves production efficiency.

[0064] Next, combine Figures 1 to 5 The working principle of the computerized flat knitting machine shearing device used for high-performance special yarns involved in the embodiments of the present application is explained.

[0065] The computerized flat knitting machine shearing device for high-performance special yarns in this embodiment is installed below the yarn mouth 6 corresponding to the ultra-high molecular weight polyethylene yarn 7. During the yarn threading process:

[0066] After the ultra-high molecular weight polyethylene yarn 7 passes through the yarn mouth 6, the butt 322 of the shearing blade 32 is pushed upward to expose the shearing end 321. The ultra-high molecular weight polyethylene yarn 7 is passed through the shearing end 321 from the left to the right on the side close to the yarn mouth 6, leaving some excess yarn.

[0067] The shearing end 321 of the shearing blade 32 is manually pressed downward. Under the action of the squeezing force, the ultra-high molecular weight polyethylene yarn 7 is first spread out to both sides between the shearing blade 32 and the shearing block 31 due to the characteristic that the monofilaments are easy to spread out. However, due to the limitation of the inverted trapezoidal opening of the shearing block 31, the range of the ultra-high molecular weight polyethylene yarn 7 is limited. Within this range, as the ultra-high molecular weight polyethylene yarn 7 is squeezed and spread out, the shearing of the ultra-high molecular weight polyethylene yarn 7 is converted into the shearing of thinner ultra-high molecular weight polyethylene monofilaments, which increases the success rate of the ultra-high molecular weight polyethylene yarn 7 being sheared, and can ensure that all monofilaments are sheared, without missing parts that become entangled in the device;

[0068] At the same time, the side of the shearing end 321 close to the yarn mouth 6 (i.e., the smooth side 3211) cannot cut the ultra-high molecular weight polyethylene yarn 7, while the shearing side 3212 (i.e., the side with the vertical serrated blade 3213) can shear the ultra-high molecular weight polyethylene yarn 7.

[0069] Therefore, during the entire shearing process of the ultra-high molecular weight polyethylene yarn 7, when the shear blade 32 moves downward and the shearing end 321 coincides with the bottom end of the inverted trapezoidal opening of the shear block 31 in height, one end of the ultra-high molecular weight polyethylene yarn 7 is cut off, and the portion of the ultra-high molecular weight polyethylene yarn 7 close to the cut end is stuck at the bottom of the shearing end 321. The smooth side 3211 clamps the ultra-high molecular weight polyethylene yarn 7, and the transverse groove 3112 also prevents the yarn from slipping.

[0070] When the computerized flat knitting machine is finished weaving, the yarn mouth 6 is brought back, and the shearing blade 32 can also rise, hook the yarn, fall, and cut the yarn under the action of the needle selector to complete the shearing process; the yarn is started and the machine drives the yarn cutting to end. The whole process is in line with the habits of the flat knitting machine technician.

[0071] It should be noted that the computerized flat knitting machine shearing device for high-performance special yarns is provided with an auxiliary component, namely the clamping assembly 4 of the device, in order to improve the knitting efficiency of the computerized flat knitting machine. At the beginning of the knitting process, the yarn mouth 6 will be driven by the head triangle to move the ultra-high molecular weight polyethylene yarn 7 to the middle of the needle bed. At this time, due to the effect of the tensile force, the ultra-high molecular weight polyethylene yarn 7 clamped in the shearing device may be brought out, and thus, under the effect of tension, it will come out of the yarn mouth 6, affecting the knitting process. In order to avoid this situation, the side of the shearing assembly 3 close to the yarn mouth 6, i.e. Figure 1The left side of the thread clamping assembly 4 is provided. When the shear blade 32 is pressed, the UHMWPE yarn 7 is sheared and clamped. At the same time, the clamp 41 of the thread clamping assembly 4 opens to clamp the UHMWPE yarn 7, providing a double guarantee for clamping the UHMWPE yarn 7. In addition, the clamping end of the clamp 41 is designed with an alligator-tooth groove 411 to prevent the UHMWPE yarn 7 from slipping, thereby improving the clamping force of the thread clamping assembly 4 and ensuring that the UHMWPE yarn 7 remains clamped when it is brought to the center of the needle bed by the yarn mouth 6. After the UHMWPE yarn 7 has been woven for a certain distance, the traction device of the computerized flat knitting machine pulls the fabric downward. At this time, the tensile force of the UHMWPE yarn 7 on the shearing device gradually becomes greater than the force generated by the movement of the yarn mouth 6 by the head triangle. When the shearing device exceeds the clamping force of the UHMWPE yarn 7, the UHMWPE yarn 7 is naturally pulled out and, under the action of the pulling roller, moves downward with the fabric. This does not affect the weaving process, and will not cause the yarn mouth 6 to be entangled with the new yarn after the machine finishes weaving. Moreover, after the yarn mouth 6 brings the UHMWPE yarn 7 back, the needle selector drives the shear blade 32 to move up and down, driving the transmission assembly 5 to transmit the power, and further drives the clamp 41 to reopen and re-clamp the UHMWPE yarn 7 when the shear blade 32 descends to cut the yarn.

[0072] In order to better understand this application, Figure 6 The operating principle of the transmission assembly 5 in this application is further explained.

[0073] The working principle of the transmission assembly 5 mainly relies on the linkage of the first gear 51, the second gear 52 and the pull rod 53. The power source is that the motor drives the head triangle, the head triangle drives the needle selector, the needle selector drives the combined knitting needle, the combined knitting needle butt drives the intermediate knitting needle, and the intermediate knitting needle drives the needle butt 322 of the shear blade 32, so the transmission assembly 5 can be automated.

[0074] like Figure 6 As shown in Figure 2 (a), the relationship between the radii R and r of the first gear 51 and the second gear 52 is R = 2r. When the gears rotate, the first gear 51 rotates one circle, and the second gear 52 rotates half a circle. One side of the first gear 51 meshes with the second gear 52, and the other side meshes with the tooth groove 323 of the shear blade 32.

[0075] like Figure 6As shown in (b), when the shear blade 32 moves upward driven by the needle selector, the first gear 51 rotates counterclockwise, causing the second gear 52 to rotate clockwise. The pull rod 53 initially moves upward from the bottom end in a left semi-arc motion. At this time, the other end of the pull rod 53 also moves upward, slowly relaxing the vertical extension of the spring 42. The horizontal extension force of the spring 42 increases, and the clamp 41 slowly opens. When the shear blade 32 reaches the top, the highest point of the bottom end of the pull rod 53 is at the highest point of the second gear 52. The top end of the pull rod 53 is flush with the spring 42, with almost no force acting on it. The clamp 41 is opened to its maximum extent.

[0076] like Figure 6 As shown in (c), when the shear blade 32 moves downward driven by the needle selector, the first gear 51 rotates clockwise, and the second gear 52 rotates counterclockwise as a result, and the pull rod 53 moves from the top to the left semi-arc in its initial position. At this time, the other end of the pull rod 53 also moves downward, slowly tightening the spring 42. The spring 42 stretches in the vertical direction, and the horizontal force of the spring 42 decreases, and the clamp 41 slowly clamps. When the shear blade 32 reaches the position where it intersects with the shear block 31 to shear the ultra-high molecular weight polyethylene yarn 7, the bottom end of the pull rod 53 is located at the lowest point of the second gear 52, and the top end of the pull rod 53 pulls the spring 42 downward to the tightest, and the clamp 41 is also clamped to the maximum extent. The opening process of the clamp 41 has no effect on the UHMWPE yarn 7. The clamping process of the clamp 41 is set to a progressive clamping mode. When the shear blade 32 is halfway down, the UHMWPE yarn 7 is pressed down to the height of the clamp 41 by the shear blade 32 and clamped by the clamp 41. However, the shear blade 32 still needs to pull the yarn downward to shear. If it is completely clamped, the shearing process will not proceed smoothly. Therefore, the clamp 41 can pull the UHMWPE yarn 7 downward from the time it clamps the UHMWPE yarn 7 to the time it is sheared.

[0077] In the embodiments disclosed herein, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; and "connected" may refer to a direct connection or an indirect connection via an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed herein based on specific circumstances.

[0078] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A computerized flat knitting machine shearing device for high-performance specialty yarns, characterized in that: It includes a cover plate for connecting to a computerized flat knitting machine, and a shearing assembly, a wire clamping assembly, and a transmission assembly mounted on the cover plate via a fixing assembly. The wire clamping assembly is located on one side of the shearing assembly, and the shearing assembly and the wire clamping assembly are connected to each other via the transmission assembly. The shearing assembly includes a concave-shaped shearing block mounted on the fixed assembly, and a shearing blade slidably connected to the shearing block, the shearing block having a through groove in the middle portion, the through groove being slidably connected to the shearing end of the upper portion of the shearing blade, the shearing blade having a needle butt at the lower portion, the needle butt being transmission-connected to the needle selector of the computerized flat knitting machine, the shearing blade having a tooth groove in the middle portion, the tooth groove being transmission-connected to the transmission assembly; The wire clamping assembly includes a clip mounted on the fixing assembly, the tail end of which is equipped with a spring for driving the clip to open and close, and the middle portion of the spring is connected to the transmission assembly; When the shear blade is not in a shearing state, the transmission assembly drives the clamping end of the clamp to expand; when the shear blade is in a shearing state, the transmission assembly drives the clamping end of the clamp to close; The shear blade is in the shape of an elongated strip, and the shear end is in the shape of a hook. The shear end has a smooth side away from the clamping assembly and a shear side close to the clamping assembly, and the shear side has a vertical serrated edge. The through groove has a longitudinal groove on a side opposite to the shear side, and a transverse groove on a side opposite to the smooth side; The clamping surface of the clamping end of the clamp has a crocodile tooth-like groove; The computer flat knitting machine shearing device applied to high-performance special yarn is installed below the yarn mouth on the computer flat knitting machine.

2. The computerized flat knitting machine shearing device for high-performance special yarn according to claim 1, characterized in that: The fixing assembly includes a first fixing rod and a second fixing rod, wherein the first end of the first fixing rod and the second fixing rod are respectively fixedly connected to the cover plate via a first bolt, and the second end of the first fixing rod and the second fixing rod are respectively fixedly connected to the shear block via a second bolt; The fixing assembly further includes a third fixing rod, a first end of the third fixing rod is fixedly connected to the cover plate, and a second end of the third fixing rod is fixedly connected to the tail end of the clip via a third bolt.

3. The computerized flat knitting machine shearing device for high-performance special yarn according to claim 2, characterized in that: The transmission assembly comprises: a first gear rotatably connected to the second fixing rod; a second gear rotatably connected to the third fixing rod; and a pull rod having a first end hingedly connected to the second gear and a second end hingedly connected to a middle portion of the spring; Wherein, one side of the first gear is transmission connected to the tooth groove, and the other side is transmission connected to the second gear.

4. The computerized flat knitting machine shearing device for high-performance special yarn according to claim 3, characterized in that: The first end of the pull rod is located at one quarter of the radial direction of the second gear.

5. The computerized flat knitting machine shearing device for high-performance special yarn according to claim 3, characterized in that: The length of the tooth groove is greater than the circumference of the first gear.

6. A computerized flat knitting machine comprising at least one set of computerized flat knitting machine shearing devices for high-performance special yarns as claimed in any one of claims 1 to 5.

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