Tensioning device and method for a constant-tension full-width laid-in warp knitting machine

Abstract

The application relates to a constant-tension full-width backing weft knitting machine and a yarn feeding method, and relates to the field of warp knitting machines. The application is characterized in that a yarn feeding mechanism is arranged on the machine body of the full-width backing weft knitting machine, a yarn laying mechanism is arranged above the yarn feeding mechanism on the machine body of the full-width backing weft knitting machine, a tension monitoring module is arranged on the yarn laying mechanism, and a yarn supply mechanism is arranged above the yarn laying mechanism. In this case, the yarn is actively unwound from the disc head and runs between the yarn laying trolley without turning and twisting; the active yarn feeding is matched with the tension monitoring module, real-time tension data is fed back to the control system, the control system adjusts the running speed of the disc head according to the feedback result, the tension fluctuation problem is reduced, and the yarn is fed with constant tension; the yarn feeding device is not only suitable for feeding low-strength or low-elasticity yarns, but also suitable for realizing the full-width backing process of glass fibers, carbon fibers and the like in the yarn turning-free and zero-degree yarn feeding mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of warp knitting machines, in particular to a constant-tension full-width interlining warp knitting machine interlining yarn feeding device and method. BACKGROUND

[0002] At present, the interlining yarn frame of the full-width interlining warp knitting machine is placed behind the machine, the cheese yarn is unwound passively, the running direction and the laying direction are placed at 90 degrees, the interlining cheese yarn is pulled through the laying trolley by the reversing mechanism to complete the laying process, and finally the interlining yarn is fed into the loop forming mechanism to complete the weaving process of the full-width interlining warp knitted fabric. This method has too large pre-tension on the interlining yarn, the yarn tension fluctuates obviously during the laying process, and is only suitable for the interlining weaving process of ordinary yarns.

[0003] In recent years, with the increase of product types of full-width interlining warp knitting industrial products, the development of full-width interlining products such as carbon fiber, glass fiber and basalt fiber with high strength and high rigidity, the passive 90-degree interlining method is easy to cause mechanical property damage of the yarn; at the same time, when the warp knitting full-width interlining is carried out for the yarn with low strength, the passive yarn feeding method is easy to cause yarn deformation failure due to small bearing capacity and easy deformation of the yarn, and the weaving action cannot be completed.

[0004] Therefore, in order to accelerate the development speed of the full-width interlining warp knitted fabric and expand the types of interlining yarns, it is necessary to change the yarn feeding method of the passive interlining mechanism and develop a yarn feeding device and method with small interlining yarn feeding reversing and stable tension fluctuation. SUMMARY

[0005] The purpose of the present application is to provide a constant-tension full-width interlining warp knitting machine interlining yarn feeding device and method to solve the problem of feeding interlining yarns with high rigidity and low strength of the passive full-width interlining warp knitting machine in the prior art.

[0006] To achieve the above purpose, the technical scheme adopted by the present application is:

[0007] In a first aspect, the present application provides a constant-tension full-width interlining warp knitting machine interlining yarn feeding device, which comprises a yarn feeding mechanism mounted on the machine body of the full-width interlining warp knitting machine, and further comprises:

[0008] a laying mechanism mounted on the machine body of the full-width interlining warp knitting machine and located above the yarn feeding mechanism, a tension monitoring module mounted on the laying mechanism, and a yarn supply mechanism located above the laying mechanism;

[0009] The yarn supply mechanism comprises:

[0010] The mounting bracket connected with the weft laying mechanism, the first disc head group and the second disc head group rotatably connected to the mounting bracket, the speed reducer mounted on the mounting bracket, the driving motor connected with the input end of the speed reducer, and the transmission reversing assembly connected with the output end of the speed reducer; the transmission reversing assembly is used to drive the first disc head group and the second disc head group to rotate towards each other or away from each other.

[0011] The weft laying mechanism actively unwinds the yarn from the first disc head group and the second disc head group, passes through the tension monitoring module, and then is conveyed to the loop forming area of the warp knitting machine through the weft feeding mechanism.

[0012] In a possible implementation, the first disc head group includes a first rotating shaft rotatably connected to the top of the mounting bracket and a plurality of first disc heads sleeved on the first rotating shaft; the second disc head group includes a second rotating shaft rotatably connected to the top of the mounting bracket and a plurality of second disc heads sleeved on the second rotating shaft; and the first disc head group and the second disc head group are parallel to each other.

[0013] In a possible implementation, the transmission reversing assembly includes a first gear sleeved on the output end of the speed reducer, a toothed belt in meshing connection with the first gear, a second gear sleeved on the first rotating shaft and in meshing connection with the toothed belt, a third rotating shaft rotatably mounted on the mounting bracket, a third gear sleeved on the first end of the third rotating shaft and in meshing connection with the toothed belt, a fourth gear sleeved on the second end of the third rotating shaft, and a fifth gear sleeved on the second rotating shaft and in meshing connection with the fourth gear.

[0014] In a possible implementation, the weft laying mechanism includes a servo motor and a slide rail mounted on the machine body of the full-width weft insertion warp knitting machine, a first synchronous wheel sleeved on the power output end of the servo motor, a second synchronous wheel rotatably mounted on the end of the slide rail away from the servo motor, a synchronous belt in meshing connection with the first synchronous wheel and the second synchronous wheel, and a weft laying trolley fixedly connected with the synchronous belt and slidably connected with the slide rail; the top of the weft laying trolley has a plurality of separate guide bars, the bottom of the weft laying trolley has a plurality of guide bars, and the weft laying mechanism is mounted on the weft laying trolley through the mounting bracket.

[0015] In a possible implementation, the tension monitoring module includes:

[0016] A tension monitoring bracket connected with the weft laying trolley and located between the plurality of separate guide bars and the plurality of guide bars.

[0017] a first yarn path support shaft, a second yarn path support shaft and a tension acquisition sensing shaft located on the first end of the tension monitoring bracket; and

[0018] a communication interface located on the second end of the tension monitoring bracket and connected with the control system of the full-width base weft warp knitting machine;

[0019] The tension acquisition sensing shaft is located between the first yarn path support shaft and the second yarn path support shaft and above the first yarn path support shaft and the second yarn path support shaft.

[0020] In a possible implementation, the toothed belt is triangular under the support of the first gear, the second gear and the third gear.

[0021] In a possible implementation, the weft laying car is slidingly connected with the slide rail through a plurality of pulleys.

[0022] In a possible implementation, the weft feeding mechanism, the weft laying mechanism, the tension monitoring module and the yarn feeding mechanism are connected with the control system of the full-width base weft warp knitting machine.

[0023] In a second aspect, the application provides a working method of a weft feeding device of a constant-tension full-width base weft warp knitting machine, which is applicable to the weft feeding device of the constant-tension full-width base weft warp knitting machine as described above, and the method comprises the following steps:

[0024] S1, the yarn unwound from the disc heads of the first disc head group and the second disc head group is pulled to a plurality of separated guide bars at the top of the weft laying car, sequentially passes through the first yarn path support shaft, the tension acquisition sensing shaft and the second yarn path support shaft of the tension monitoring module, and then passes through a plurality of guide bars at the bottom of the weft laying car, and finally reaches the weft feeding mechanism;

[0025] S2, in response to the driving motor of the yarn feeding mechanism starting to work, the speed reducer drives the transmission reversing assembly to operate, and the transmission reversing assembly drives the first disc head group and the second disc head group to rotate towards each other or away from each other;

[0026] S3, in response to the yarn being unwound from the disc heads of the first disc head group and the second disc head group, the servo motor of the weft laying mechanism starts to work, the first synchronous wheel drives the synchronous belt to operate, the weft laying car moves back and forth on the slide rail, drives the yarn to lay weft, and after the yarn tension is adjusted by the tension monitoring module, the yarn is conveyed to the loop forming area of the warp knitting machine through the weft feeding mechanism.

[0027] In a possible implementation, in the step S3,

[0028] The tension monitoring module adjusts the yarn tension, which comprises:

[0029] In response to the tension monitoring module transmitting the real-time tension data of the yarn to the control system of the full-width base weft knitting machine, the control system of the full-width base weft knitting machine compares the real-time tension data with the preset tension threshold value, and sends a tension adjustment signal to the driving motor of the yarn feeding mechanism;

[0030] Based on the driving motor of the yarn feeding mechanism receiving the tension adjustment signal, the driving motor adjusts the active unwinding speed of the first disc head group and the second disc head group, so as to realize the constant tension weft feeding of the full-width base weft knitting machine.

[0031] If the real-time tension data is less than the preset tension threshold value, the control system of the full-width base weft knitting machine sends a speed reduction signal to the driving motor of the yarn feeding mechanism; if the real-time tension data is greater than the preset tension threshold value, the control system of the full-width base weft knitting machine sends a speed increase signal to the driving motor of the yarn feeding mechanism.

[0032] The technical scheme provided by the present application has at least the following beneficial effects:

[0033] By arranging the weft feeding mechanism mounted on the machine body of the full-width base weft knitting machine, the laying mechanism mounted on the machine body of the full-width base weft knitting machine and located above the weft feeding mechanism, the tension monitoring module mounted on the laying mechanism, and the yarn feeding mechanism located above the laying mechanism, in this case, the yarn unwound by the disc head runs between the laying car without turning and twisting; the active weft feeding is used in combination with the tension monitoring module, and the real-time tension data is fed back to the control system, the control system adjusts the running speed of the disc head according to the feedback result, reduces the tension fluctuation problem, and realizes the constant tension weft feeding of the yarn; the weft feeding device is not only suitable for the weft feeding of low-strength (or low-elasticity) yarn, but also suitable for the full-width base weft process of glass fiber, carbon fiber and the like. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, illustrate the present application together with the embodiments thereof, and explain the present application, but do not limit the present application. In the drawings:

[0035] Figure 1 Fig. 1 shows a structural schematic diagram of the weft feeding device of the constant tension full-width base weft knitting machine provided by an exemplary embodiment of the present application;

[0036] Figure 2 Fig. 2 shows a structural schematic diagram of the yarn feeding mechanism of the weft feeding device of the constant tension full-width base weft knitting machine provided by an exemplary embodiment of the present application;

[0037] Figure 3Fig. 1 shows a structural schematic diagram of a laying mechanism of a feed device of a constant tension full-width backing warp knitting machine according to an example embodiment of the present application;

[0038] Figure 4 Fig. 2 shows a structural schematic diagram of a tension monitoring module of the feed device of the constant tension full-width backing warp knitting machine according to an example embodiment of the present application;

[0039] Figure 5 Fig. 3 shows a flow chart of a working method of the feed device of the constant tension full-width backing warp knitting machine according to an example embodiment of the present application;

[0040] Fig. 1 shows a structural schematic diagram of a laying mechanism of a feed device of a constant tension full-width backing warp knitting machine according to an example embodiment of the present application;

[0041] 1, feed mechanism; 2, laying mechanism; 3, tension monitoring module; 4, yarn supply mechanism;

[0042] 21, servo motor; 22, slide rail; 23, first synchronous wheel; 24, second synchronous wheel; 25, synchronous belt; 26, laying trolley; 27, yarn dividing comb; 28, yarn guiding comb; 29, pulley;

[0043] 31, tension monitoring support; 32, first yarn path support shaft; 33, second yarn path support shaft; 34, tension acquisition sensing shaft; 35, communication interface;

[0044] 41, mounting support; 42, first disc head group; 43, second disc head group; 44, speed reducer; 45, driving motor; 46, transmission reversing assembly;

[0045] 421, first rotating shaft; 422, first disc head; 431, second rotating shaft; 432, second disc head;

[0046] 461, first gear; 462, toothed belt; 463, second gear; 464, third rotating shaft; 465, third gear; 466, fourth gear; 467, fifth gear. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0048] Wherein, same parts are denoted by same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings of the present application, and the words "bottom" and "top", "inner" and "outer" refer to the directions towards or away from the specific parts. In addition, the terms "first" and "second" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more.

[0049] The present application will be further described below in conjunction with the drawings and examples.

[0050] Figure 1 The structure schematic diagram of the weft feeding device of the constant tension full-width backing warp knitting machine provided by one example embodiment of the present application is shown, which is prior art, and the weft feeding device includes a weft feeding mechanism 1 installed on the machine body of the full-width backing warp knitting machine.

[0051] Please refer to Figure 1 The weft feeding device further includes a weft laying mechanism 2 installed on the machine body of the full-width backing warp knitting machine and located above the weft feeding mechanism 1, a tension monitoring module 3 installed on the weft laying mechanism 2, and a yarn supply mechanism 4 located above the weft laying mechanism 2.

[0052] In the embodiment of the present application, the weft feeding mechanism 1, the weft laying mechanism 2, the tension monitoring module 3 and the yarn supply mechanism 4 are connected with the control system of the full-width backing warp knitting machine.

[0053] In detail, please refer to Figure 1 and Figure 2 The yarn supply mechanism 4 includes a mounting bracket 41 connected with the weft laying mechanism 2, a first disc head group 42 and a second disc head group 43 rotatably connected to the mounting bracket 41, a speed reducer 44 installed on the mounting bracket 41, a driving motor 45 connected with the input end of the speed reducer 44, and a transmission reversing assembly 46 connected with the output end of the speed reducer 44; the transmission reversing assembly 46 is used to drive the first disc head group 42 and the second disc head group 43 to rotate towards each other or away from each other; wherein the weft laying mechanism 2 pulls the yarn to be unwound from the first disc head group 42 and the second disc head group 43, and after passing through the tension monitoring module 3, the yarn is transported to the loop forming area of the warp knitting machine through the weft feeding mechanism 1.

[0054] Specifically, please refer to Figure 2The first disc head group 42 comprises a first rotating shaft 421 rotatably connected to the top of the mounting bracket 41 and a plurality of first disc heads 422 sleeved on the first rotating shaft 421; the second disc head group 43 comprises a second rotating shaft 431 rotatably connected to the top of the mounting bracket 41 and a plurality of second disc heads 432 sleeved on the second rotating shaft 431; the first disc head group 42 and the second disc head group 43 are parallel to each other.

[0055] More specifically, referring to Figure 2 The transmission reversing assembly 46 comprises a first gear 461 sleeved on the output end of the speed reducer 44, a toothed belt 462 in meshing connection with the first gear 461, a second gear 463 sleeved on the first rotating shaft 421 and in meshing connection with the toothed belt 462, a third rotating shaft 464 rotatably mounted on the mounting bracket 41, a third gear 465 sleeved on the first end of the third rotating shaft 464 and in meshing connection with the toothed belt 462, a fourth gear 466 sleeved on the second end of the third rotating shaft 464, and a fifth gear 467 sleeved on the second rotating shaft 431 and in meshing connection with the fourth gear 466.

[0056] It is worth mentioning that the toothed belt 462 is triangular under the support of the first gear 461, the second gear 463 and the third gear 465.

[0057] In the embodiment of the present application, the yarn feeding mechanism 4 is integrally mounted with the weft laying mechanism 2, the driving motor 45 of the yarn feeding mechanism 4 drives the first disc head group 42 and the second disc head group 43 to rotate to positively feed the weft, and the first disc head group 42 and the second disc head group 43 are reversely rotatable or oppositely rotatable through the transmission reversing assembly 46. During the running process of the yarn feeding into the weft laying mechanism 2, the yarn is not twisted and twisted at the disc head of the first disc head group 42 and the second disc head group 43, thereby realizing constant tension feeding and 0-degree weft laying.

[0058] In the embodiment of the present application, the first rotating shaft 421, the second rotating shaft 431 and the third rotating shaft 464 are rotatably connected to the mounting bracket 41 through bearings.

[0059] In one example, the number of the first disc heads 422 and the second disc heads 432 is two groups.

[0060] Further, referring to Figure 1 and Figure 3The laying-in mechanism 2 comprises a servo motor 21 and a slide rail 22 installed on the machine body of the full-width laying-in warp knitting machine, a first synchronous wheel 23 sleeved on the power output end of the servo motor 21, a second synchronous wheel 24 rotatably installed on the end of the slide rail 22 away from the servo motor 21, a synchronous belt 25 in meshing connection with the first synchronous wheel 23 and the second synchronous wheel 24, and a laying-in trolley 26 fixedly connected with the synchronous belt 25 and slidably connected with the slide rail 22. The top of the laying-in trolley 26 is provided with a plurality of component guide bars 27, and the bottom of the laying-in trolley 26 is provided with a plurality of guide bars 28. The laying-in mechanism 2 is installed on the laying-in trolley 26 through a mounting bracket 41.

[0061] In the embodiment of the present application, the yarns unwound from the disc heads of the first disc head group 42 and the second disc head group 43 are pulled to the plurality of component guide bars 27 on the top of the laying-in trolley 26, pass through the tension monitoring module 3, then pass through the plurality of guide bars 28 on the bottom of the laying-in trolley 26, and finally reach the laying-in mechanism 1.

[0062] In the embodiment of the present application, based on the existing full-width laying-in warp knitting machine, the yarn supply mechanism 4 and the laying-in mechanism 2 are provided in an integrated structure, and the yarn supply mechanism 4 and the laying-in mechanism 2 move together in the head-to-tail direction of the full-width laying-in warp knitting machine. The yarn supply mechanism 4 is controlled by a program, and actively feeds the yarn according to the speed of the laying-in mechanism 2. Meanwhile, the tension monitoring module 3 is installed in the yarn conveying path, and real-time tension data is fed back to the control system of the full-width laying-in warp knitting machine. The control system adjusts the active unwinding speed of the disc head according to the tension data, so as to realize the active unwinding and constant tension of the yarn between the laying-in disc head and the laying-in trolley 26.

[0063] In the embodiment of the present application, the second synchronous wheel 24 is rotatably sleeved on a group of rotating shafts through a group of bearings, and the end of the rotating shaft away from the second synchronous wheel 24 is fixed on the side wall of the slide rail 22, so as to realize the rotatable connection with the slide rail 22.

[0064] In the embodiment of the present application, the laying-in trolley 26 is slidably connected with the slide rail 22 through a plurality of pulleys 29. In one example, the laying-in trolley 26 is slidably connected with the slide rail 22 through four pulleys 29, which are respectively slidably connected with the top and the bottom of the slide rail 22.

[0065] Further, please refer to Figure 4, the tension monitoring module 3 comprises: a tension monitoring bracket 31 connected to the laying-in trolley 26 and located between the multi-component guide bar 27 and the multi-component guide bar 28; a first yarn path support shaft 32, a second yarn path support shaft 33 and a tension acquisition sensor shaft 34 located on the first end of the tension monitoring bracket 31; and a communication interface 35 located on the second end of the tension monitoring bracket 31 and connected to the control system of the full-width laid-in warp knitting machine; wherein the tension acquisition sensor shaft 34 is located between the first yarn path support shaft 32 and the second yarn path support shaft 33 and above the first yarn path support shaft 32 and the second yarn path support shaft 33.

[0066] In the embodiment of the present application, the yarns unwound from the disc heads of the first disc head group 42 and the second disc head group 43 are pulled to the multi-component guide bar 27 at the top of the laying-in trolley 26, pass through the first yarn path support shaft 32, the tension acquisition sensor shaft 34 and the second yarn path support shaft 33 of the tension monitoring module 3 in sequence, and then pass through the multi-component guide bar 28 at the bottom of the laying-in trolley 26, and finally reach the laying-in mechanism 1.

[0067] In the embodiment of the present application, the tension acquisition sensor shaft 34 adopts a high-sensitivity tension sensor for monitoring the tension fluctuation of the yarn running and compensating the tension through a feedback system and a control system to realize the tension peak clipping and valley filling and constant tension laying-in target of the laying-in process. In addition to the tension monitoring feedback function to the warp knitting machine control system, the tension acquisition sensor shaft 34 can support an over-range mechanical alarm function to facilitate the laying-in mechanism running state monitoring by the stopping operator in real time.

[0068] Figure 5 A flow chart of the working method of the laying-in device of the constant tension full-width laid-in warp knitting machine provided by an exemplary embodiment of the present application is shown. The method is applicable to the laying-in device of the constant tension full-width laid-in warp knitting machine as described above, and the method comprises the following steps:

[0069] Step S1, the yarns unwound from the disc heads of the first disc head group and the second disc head group are pulled to the multi-component guide bar at the top of the laying-in trolley, pass through the first yarn path support shaft, the tension acquisition sensor shaft and the second yarn path support shaft of the tension monitoring module in sequence, and then pass through the multi-component guide bar at the bottom of the laying-in trolley, and finally reach the laying-in mechanism;

[0070] Step S2, in response to the driving motor of the yarn supply mechanism starting to work, the speed reducer drives the transmission reversing assembly to operate, and the transmission reversing assembly drives the first disc head group and the second disc head group to rotate towards each other or away from each other;

[0071] Step S3, in response to the yarn being unwound from the first disc head group and the second disc head group, the servo motor of the weft laying mechanism starts to work, the first synchronous wheel drives the synchronous belt to run, the weft laying trolley reciprocates on the slide rail, and the yarn is laid by the weft laying trolley. After the yarn tension is adjusted by the tension monitoring module, the yarn is transported to the loop forming area of the warp knitting machine through the weft feeding mechanism.

[0072] Specifically, in the above step S3, the yarn tension is adjusted by the tension monitoring module, including:

[0073] Step S31, in response to the real-time tension data of the yarn being transmitted by the tension monitoring module to the control system of the full-width base weft warp knitting machine, the control system of the full-width base weft warp knitting machine compares the real-time tension data with the preset tension threshold, and sends a tension adjustment signal to the driving motor of the yarn feeding mechanism;

[0074] Step S32, based on the driving motor of the yarn feeding mechanism receiving the tension adjustment signal, the driving motor adjusts the active unwinding speed of the first disc head group and the second disc head group, so as to realize constant tension weft feeding of the full-width base weft warp knitting machine.

[0075] Wherein, when the real-time tension data is less than the preset tension threshold, the control system of the full-width base weft warp knitting machine sends a speed reduction signal to the driving motor of the yarn feeding mechanism; when the real-time tension data is greater than the preset tension threshold, the control system of the full-width base weft warp knitting machine sends a speed increase signal to the driving motor of the yarn feeding mechanism.

[0076] In an optional embodiment, the yarn feeding mechanism is jogged on the control interface of the full-width base weft warp knitting machine, the disc head yarn is drawn out, and after passing through the weft laying mechanism and the tension monitoring module, it reaches the weft feeding mechanism; the yarn feeding mechanism and the weft laying mechanism are linked on the control interface, the weft laying mechanism and the yarn feeding mechanism are jogged to complete a weft laying process (in order to eliminate the weft tension fluctuation when the whole machine is linked and runs at high speed), the program fluctuation range of the tension monitoring module is set, and low-speed trial operation is completed; the machine running speed is set, the full-width base weft warp knitting machine is started to run continuously, and the yarn feeding, weft laying and cloth weaving process is completed.

[0077] In summary, the application sets the weft feeding mechanism installed on the body of the full-width weft insertion warp knitting machine, the weft laying mechanism installed on the body of the full-width weft insertion warp knitting machine and located above the weft feeding mechanism, the tension monitoring module installed on the weft laying mechanism, and the yarn supply mechanism located above the weft laying mechanism. In this case, the yarn is actively unwound from the disc head and runs between the weft laying trolley without turning and twisting; the active weft feeding is used in combination with the tension monitoring module, and the real-time tension data is fed back to the control system, the control system adjusts the running speed of the disc head according to the feedback result, reduces the tension fluctuation problem, realizes the constant tension weft feeding; the weft feeding device is not only suitable for the weft feeding of low-strength (or low-elasticity) yarn, but also the yarn turning-free and zero-degree weft feeding mode can be applied to the realization of the full-width weft insertion process of glass fiber, carbon fiber and the like.

[0078] In the embodiments disclosed in the application, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense. For example, "connecting" can be fixedly connected, or detachably connected, or integrally connected; "connecting" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments disclosed in the application can be understood according to the specific circumstances.

[0079] The above is only the preferred embodiment of the application, and it should be pointed out that for those skilled in the art, some improvements and refinements can be made without departing from the principles of the application, and these improvements and refinements should also be considered as the protection scope of the application.

Claims

1. A yarn feeding device of a constant tension full-width laid-in warp knitting machine, comprising a yarn feeding mechanism mounted on a machine body of the full-width laid-in warp knitting machine, characterized in that: the yarn feeding device of the constant tension full-width laid-in warp knitting machine further comprises: a yarn laying mechanism mounted on the machine body of the full-width laid-in warp knitting machine and above the yarn feeding mechanism, a tension monitoring module mounted on the yarn laying mechanism, and a yarn supply mechanism above the yarn laying mechanism; the yarn supply mechanism comprises: a mounting bracket connected with the yarn laying mechanism, a first disc head group and a second disc head group rotatably connected to the mounting bracket, a speed reducer mounted on the mounting bracket, a driving motor connected with an input end of the speed reducer, and a transmission reversing assembly connected with an output end of the speed reducer; the transmission reversing assembly is used to drive the first disc head group and the second disc head group to rotate towards each other or away from each other; wherein the yarn laying mechanism actively unwinds the yarn from the first disc head group and the second disc head group, passes through the tension monitoring module, and is then delivered to a loop forming area of the warp knitting machine through the yarn feeding mechanism; the first disc head group comprises a first rotating shaft rotatably connected to the top of the mounting bracket and a plurality of first disc heads sleeved on the first rotating shaft; the second disc head group comprises a second rotating shaft rotatably connected to the top of the mounting bracket and a plurality of second disc heads sleeved on the second rotating shaft; the first disc head group and the second disc head group are parallel to each other; the transmission reversing assembly comprises: a first gear sleeve on the output end of the speed reducer; a toothed belt in meshing connection with the first gear; a second gear sleeve on the first rotating shaft in meshing connection with the toothed belt; a third rotating shaft rotatably mounted on the mounting bracket; a third gear sleeve on the first end of the third rotating shaft in meshing connection with the toothed belt; a fourth gear sleeve on the second end of the third rotating shaft; and a fifth gear sleeve on the second rotating shaft in meshing connection with the fourth gear.

2. The let-off device of a constant tension full width laid-in warp knitting machine according to claim 1, characterized in that, the yarn laying mechanism comprises: a servo motor and a slide rail mounted on the machine body of the full-width laid-in warp knitting machine; a first synchronous wheel sleeved on the power output end of the servo motor; a second synchronous wheel rotatably mounted on the end of the slide rail away from the servo motor; a synchronous belt in meshing connection with the first synchronous wheel and the second synchronous wheel; and a yarn laying trolley fixedly connected with the synchronous belt and slidingly connected with the slide rail; wherein the top of the yarn laying trolley has a plurality of dividing guides, the bottom of the yarn laying trolley has a plurality of guide guides, and the yarn laying mechanism is mounted on the yarn laying trolley through the mounting bracket.

3. The let-off device of a constant tension full width laid-in warp knitting machine according to claim 2, characterized in that, the tension monitoring module comprises: a tension monitoring bracket connected with the yarn laying trolley and located between the plurality of dividing guides and the plurality of guide guides; a first yarn path support shaft, a second yarn path support shaft and a tension acquisition sensing shaft located on the first end of the tension monitoring bracket; and a communication interface located on the second end of the tension monitoring bracket and connected with a control system of the full-width laid-in warp knitting machine. The tension acquisition sensing shaft is located between the first yarn path support shaft and the second yarn path support shaft and above the first yarn path support shaft and the second yarn path support shaft.

4. The let-off device of the constant tension full width laid-in warp knitting machine according to claim 1, wherein The toothed belt is triangularized under the support of the first gear, the second gear and the third gear.

5. The let-off device of the constant tension full width weft insertion warp knitting machine according to claim 2, characterized in that, The weft laying trolley is slidingly connected with the slide rail through a plurality of pulleys.

6. The let-off device of the constant tension full width weft insertion warp knitting machine according to claim 1, characterized in that, The weft feeding mechanism, the weft laying mechanism, the tension monitoring module and the yarn feeding mechanism are connected with a control system of the full-width backing warp knitting machine.

7. A working method of a weft feeding device of a constant tension full-width backing warp knitting machine, the method being applicable to the weft feeding device of the constant tension full-width backing warp knitting machine as claimed in any one of claims 1 to 6, and the method comprising: S1, the yarns unwound from the disc heads of the first disc head group and the second disc head group are pulled to a plurality of separate guide bars at the top of the weft laying trolley, sequentially pass through the first yarn path support shaft, the tension acquisition sensing shaft and the second yarn path support shaft of the tension monitoring module, and then pass through a plurality of guide bars at the bottom of the weft laying trolley, and finally reach the weft feeding mechanism; S2, in response to the driving motor of the yarn feeding mechanism starting to work, the speed reducer drives the transmission reversing assembly to operate, and the transmission reversing assembly drives the first disc head group and the second disc head group to rotate towards each other or away from each other; S3, in response to the yarns being unwound from the disc heads of the first disc head group and the second disc head group, the servo motor of the weft laying mechanism starts to work, the first synchronous pulley drives the synchronous belt to operate, the weft laying trolley reciprocates on the slide rail, and the yarns are laid by the weft laying trolley, and after the yarn tension is adjusted by the tension monitoring module, the yarns are fed to the loop forming area of the warp knitting machine through the weft feeding mechanism.

8. The operating method of the let-off device of the constant-tension full-width weft-knitting machine according to claim 7, characterized in that, In the S3, The tension monitoring module adjusts the yarn tension, comprising: In response to the tension monitoring module transmitting the real-time tension data of the yarns to the control system of the full-width backing warp knitting machine, the control system of the full-width backing warp knitting machine compares the real-time tension data with a preset tension threshold value, and sends a tension adjustment signal to the driving motor of the yarn feeding mechanism; Based on the driving motor of the yarn feeding mechanism receiving the tension adjustment signal, the driving motor adjusts the positive unwinding speed of the first disc head group and the second disc head group, so as to realize the constant tension weft feeding of the full-width backing warp knitting machine; If the real-time tension data is less than the preset tension threshold value, the control system of the full-width backing warp knitting machine sends a speed reduction signal to the driving motor of the yarn feeding mechanism; if the real-time tension data is greater than the preset tension threshold value, the control system of the full-width backing warp knitting machine sends a speed increase signal to the driving motor of the yarn feeding mechanism.

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