Adjustable traction mechanism of warp knitting machine

Abstract

The invention belongs to the technical field of warp knitting machines, particularly relates to an adjustable traction mechanism of a warp knitting machine, and provides the following scheme that the adjustable traction mechanism comprises a mounting frame, two guide pieces are arranged on one side of the mounting frame, two guide rollers are arranged on the other side of the mounting frame, and rotating frames are rotationally arranged in the middles of the two ends of the mounting frame; two traction rollers are fixed between the two rotating frames, an annular tooth is fixed to the outer wall of one rotating frame, a horizontally-extending driving rack is meshed with the circumferential outer wall of the annular tooth, an electric telescopic rod is arranged at the position, away from the annular tooth, of the driving rack, and the electric telescopic rod and the driving rack are arranged in parallel; a sliding groove is formed in the position, corresponding to the electromagnetic block, of the outer wall of the driving rack. When the tensioning force of the yarn is too large, the driving rack can slide relative to the electromagnetic block, so that the yarn can be slightly loosened to avoid breakage caused by excessive tensioning, and the situation that manual pulling and connecting are needed again is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of warp knitting machines, and particularly to an adjustable pulling mechanism for a warp knitting machine. Background Art

[0002] A warp knitting machine is a machine for manufacturing warp knitted fabrics. The pulling mechanism of the warp knitting machine is mainly used to feed the wound yarn into the machine for use.

[0003] Referring to the Chinese patent with the patent publication number CN222476919U, a fabric pulling and adjusting device for a warp knitting machine includes: a machine housing, a conveying roller is arranged inside the machine housing; an anti-deformation mechanism is arranged inside the machine housing, and the surface of the anti-deformation mechanism penetrates to the outside of the machine housing; wherein, the anti-deformation mechanism includes a wrinkle-proof component arranged inside the machine housing, a side-edge shifting component is arranged on the surface of the wrinkle-proof component, and one end of the side-edge shifting component penetrates to the outside of the machine housing.

[0004] However, in both the above-mentioned prior art or conventional means, generally, the yarn is taut between the machine and the winding cylinder is slack. The yarn is fed through the movement of the pulling mechanism. However, when the yarn is entangled with the winding cylinder, it is easy to cause the yarn to break due to excessive tension at both ends of the yarn during the pulling process. Summary of the Invention

[0005] Based on the technical problems in the background art, the present invention proposes an adjustable pulling mechanism for a warp knitting machine.

[0006] An adjustable pulling mechanism for a warp knitting machine proposed by the present invention includes a mounting frame. Two guiding members are arranged on one side of the mounting frame, and two guiding rollers are arranged on the other side of the mounting frame. Rotating frames are rotatably arranged at the middle positions of both ends of the mounting frame. Two pulling rollers are fixed between the two rotating frames. A ring gear is fixed to the outer wall of one of the rotating frames. A horizontally extending driving rack meshes with the circumferential outer wall of the ring gear. An electric telescopic rod is arranged at a position far from the ring gear of the driving rack. The electric telescopic rod is arranged in parallel with the driving rack. An electromagnetic block is installed at the telescopic end of the electric telescopic rod. A sliding groove is opened at a position on the outer wall of the driving rack corresponding to the electromagnetic block. The length of the sliding groove is greater than the length of the electromagnetic block. After the electromagnetic block is powered on, it is magnetically adsorbed to the inner wall of the sliding groove.

[0007] Preferably, a first limiting groove is opened at a position on the end face of the mounting frame corresponding to the driving rack. Two first limiting rods are fixed to the driving rack in the direction towards the first limiting groove. The first limiting rods are slidably connected to the inner wall of the first limiting groove. A first limiting plate is fixed between the ends of the two first limiting rods far from the driving rack.

[0008] Preferably, the driving rack is located below the ring gear. One end of the driving rack towards the guiding roller is connected to the mounting frame by a first spring.

[0009] Preferably, the two guiding members are provided with a fixed plate and a movable plate. The fixed plate is located above the movable plate, and both sides of the fixed plate and the movable plate are provided with arc-shaped structures arched outward.

[0010] Preferably, both ends of the fixed plate are fixedly connected to the mounting frame. Two limiting rods II are installed at both ends of the movable plate. Vertical limiting grooves II are formed at positions of the mounting frame corresponding to the limiting rods II. Limiting plates II are fixed at both ends of the outer wall of the limiting rods II located in the limiting grooves II. A jacking assembly is connected below the movable plate.

[0011] Preferably, the jacking assembly is provided with a sliding sleeve housing fixed at the middle position of the bottom of the movable plate. The sliding sleeve housing extends vertically downward. A moving rack is slidably connected in the sliding sleeve housing. A second spring is connected between the top end of the moving rack and the inner wall of the top of the sliding sleeve housing.

[0012] Preferably, the jacking assembly is further provided with a shaft rod. Both ends of the shaft rod are rotatably connected to the mounting frame. The shaft rod is located below the electric telescopic rod. A first gear meshing with the moving rack is fixed on the outer wall of the shaft rod.

[0013] Preferably, a connecting rack is installed on the outer wall of the driving rack facing the direction of the shaft rod. The connecting rack is located at one end of the driving rack close to the guiding member. A second gear meshing with the connecting rack is fixed on the outer wall of the shaft rod.

[0014] Preferably, an installation groove is formed at the bottom of the fixed plate. An extrusion piece is arranged in the installation groove. The extrusion piece is arranged parallel to the fixed plate in the horizontal direction. A pressure sensor is connected between the extrusion piece and the installation groove. During the process of the electric telescopic rod contracting and pulling, the extrusion force at the bottom position of the fixed plate is monitored through the pressure sensor. If the extrusion force exceeds the set threshold value, it indicates that the yarn is over-tightened and there is a risk of breaking, and the staff is reminded in time.

[0015] Preferably, a tension sensor is connected between the mounting frame and the first spring. The tension sensor is used to monitor the tension value of the first spring in real time. During the pulling process, if the tension value monitored by the tension sensor decreases abnormally or the increase amplitude decreases abnormally during the increasing process, it indicates that the tension of the yarn position is too large, and the staff is reminded in time.

[0016] The beneficial effects in the present invention are as follows: 1. In the present invention, when the tension of the yarn is too large, the driving rack can slide relative to the electromagnetic block at the end of the electric telescopic rod, so that the yarn can be slightly relaxed to avoid breaking due to over-tightening, and it is avoided that manual reconnection is required, so as to improve the effectiveness of long-term pulling operation.

[0017] 2. In the present invention, through the setting of the overall pulling structure and the comprehensive judgment of the pressure sensor and the tension sensor, it is possible to adaptively adjust the excessive tension of the yarn during the pulling process and can timely and accurately judge to remind the staff.

[0018] 3. In the present invention, when not pulling, the elastic force of the second spring is balanced with the elastic force of the first spring and the tension force of the yarn to maintain the limiting effect on the yarn at the position of the guiding member, and ensure the tension state of the yarn between the two pulling rollers to avoid entanglement caused by looseness and affect the next pulling operation. Moreover, the greater the pulling force of the rear machine on the yarn, the greater the upward extrusion force on the second spring and the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 2 is a schematic diagram of the distribution structure of the guiding member, the rotating frame and the guiding roller of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 3 is a schematic diagram of the structure of the rotating frame and the pulling roller of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 4 is a schematic diagram of the position structure of the driving rack of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 5 is a schematic diagram of the position structure of the electromagnetic block and the sliding groove of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 6 is a schematic diagram of the position structure of the first limiting groove of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 7 is a schematic diagram of the structure of the guiding member of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 8 is a schematic diagram of the position structure of the movable plate of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention; Figure 9 is a schematic diagram of the internal structure of the sliding sleeve housing of an adjustable pulling mechanism of a warp knitting machine proposed by the present invention.

[0020] In the figure: 1 mounting frame, 2 guiding member, 3 guiding roller, 4 rotating frame, 401 rotating shaft, 5 pulling roller, 6 ring gear, 7 electric control telescopic rod, 8 driving rack, 801 sliding groove, 9 fixed seat, 10 electromagnetic block, 11 first spring, 12 first limiting groove, 13 first limiting rod, 14 first limiting plate, 15 fixing plate, 16 movable plate, 161 second limiting rod, 17 second limiting groove, 18 sliding sleeve housing, 181 sliding sleeve cavity, 19 moving rack, 191 slider, 20 second spring, 21 shaft rod, 22 connecting rack, 23 second gear, 24 first gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Embodiment 1: Referring to Figures 1 - 7 , an adjustable drawing mechanism for a warp knitting machine, including a mounting frame 1. Two guide members 2 are arranged on one side of the mounting frame 1. Two guide rollers 3 are arranged on the other side of the mounting frame 1 away from the guide members 2. Rotating frames 4 are rotatably arranged at the middle positions of both ends of the mounting frame 1. Rotating shafts 401 are fixed at the middle positions of the ends of the two rotating frames 4 away from each other. Rotating holes corresponding to the positions of the rotating shafts 401 are opened on the mounting frame 1. Two drawing rollers 5 are fixed between the two rotating frames 4. The two drawing rollers 5 are both horizontally placed and arranged in parallel. The two ends of the drawing roller 5 are fixed to the corresponding same ends of the two rotating frames 4. The yarn enters between the two guide members 2, passes above the drawing roller 5 close to the guide member 2 in sequence, then passes below the drawing roller 5 close to the guide roller 3, and then is sent out between the two guide rollers 3. A ring gear 6 is fixed to the outer wall of one of the rotating frames 4 in the direction close to the drawing roller 5. The ring gear 6 encloses the two drawing rollers 5 therein. A horizontally extending driving rack 8 meshes with the circumferential outer wall of the ring gear 6. An electric telescopic rod 7 is arranged at a position away from the ring gear 6 of the driving rack 8. The electric telescopic rod 7 is arranged in parallel with the driving rack 8. A fixed seat 9 is installed at the telescopic end of the electric telescopic rod 7. An electromagnet 10 is installed on the fixed seat 9. A chute 801 is opened at a position on the outer wall of the driving rack 8 corresponding to the electromagnet 10. The outer wall of the electromagnet 10 away from the fixed seat 9 fits with the inner wall of the chute 801. The length of the chute 801 is greater than the length of the electromagnet 10. After the electromagnet 10 is energized, it magnetically adsorbs with the inner wall of the chute 801. When in use, after the electromagnet 10 is energized, the driving rack 8 horizontally moves along with the telescopic movement of the electric telescopic rod 7. The meshing between the driving rack 8 and the ring gear 6 is used to realize the clockwise deflection of the ring gear 6, the rotating frame 4 and the two drawing rollers 5 around the rotating shaft 401. The yarn close to the guide roller 3 is fixed to the machine and the yarn close to the guide member 2 is slack, so as to realize the drawing operation. The telescopic distance of the electric telescopic rod 7 is adjusted to be able to adjust the drawing length each time; and during the long-term use process, if the yarn close to the guide member 2 is entangled with the winding cylinder and does not remain slack, during the process that the yarn gradually becomes taut as the two drawing rollers 5 rotate, through the setting of the slidable distance between the electromagnet 10 and the chute 801, when the tension of the yarn is too large, it can overcome the magnetic suction force, the driving rack 8 can slide relative to the electromagnet 10 at the end of the electric telescopic rod 7, so as to be able to slightly slack the yarn to avoid breaking due to excessive tension, and avoid the need for manual reconnection, so as to improve the effectiveness of the long-term drawing operation; It should be noted that: the rotating frame 4 is rotated to the maximum position in advance according to the distance to be pulled, and both ends of the yarn or the detection line are pulled to the preset maximum tension to correspond to the corresponding tension force. Then, the electromagnetic suction force of the electromagnetic block 10 is gradually reduced until slippage occurs between the driving rack 8 and the electromagnetic block 10, so as to select the corresponding electromagnetic suction force to be used during the actual pulling process; thus, through the above-mentioned pulling structure setting, the electromagnetic suction force corresponding to the operation of the electromagnetic block 10 can be adjusted in advance according to the adaptability of different yarns to the tension force and different pulling distances, so as to ensure the operation effect of slippage and relaxation between the driving rack 8 and the electromagnetic block 10 before excessive tension, and thus improve the applicability of the pulling mechanism through adjustable setting.

[0022] In the present invention, a first limiting groove 12 is opened at a position on the end face of the mounting frame 1 corresponding to the driving rack 8. Two first limiting rods 13 are fixed in the direction of the first limiting groove 12 on the driving rack 8. The first limiting rods 13 are slidably connected to the inner wall of the first limiting groove 12. A first limiting plate 14 is fixed between the ends of the two first limiting rods 13 away from the driving rack 8 to ensure the stability of the horizontal movement of the driving rack 8 when the electromagnetic block 10 is not magnetically adsorbed to the driving rack 8.

[0023] In the present invention, the driving rack 8 is located below the ring gear 6, and the electric telescopic rod 7 is located below the driving rack 8. A first spring 11 is connected between one end of the driving rack 8 facing the guide roller 3 and the mounting frame 1, so that the driving rack 8 has a reset ability while maintaining its mobility.

[0024] In the present invention, the two guide members 2 are provided with a fixed plate 15 and a movable plate 16. The fixed plate 15 is located above the movable plate 16. Both sides of the fixed plate 15 and the movable plate 16 are provided with arc-shaped structures arched outward. The two ends of the fixed plate 15 are fixedly connected to the mounting frame 1. Two second limiting rods 161 are installed at both ends of the movable plate 16. Second limiting grooves 17 extending vertically are opened at positions on the mounting frame 1 corresponding to the second limiting rods 161. Second limiting plates are fixed at both ends of the outer wall of the second limiting rods 161 located in the second limiting grooves 17. A lifting assembly is connected below the movable plate 16. During the pulling process, the lifting assembly and the movable plate 16 descend and are supported and limited by the fixed plate 15. When placed normally after the pulling is completed, the movable plate 16 moves upward to squeeze and limit the yarn with the fixed plate 15, avoiding the yarn at the connection machine position from pulling the yarn placed normally at the reel position and causing loosening, thereby ensuring the effectiveness of the intermittent pulling operation during the long-term working process.

[0025] In the present invention, an installation groove is formed at the bottom of the fixed plate 15. An extrusion sheet is arranged in the installation groove. The extrusion sheet is arranged parallel to the fixed plate 15 in the horizontal direction. A pressure sensor is connected between the extrusion sheet and the installation groove. During the process of the electric telescopic rod 7 contracting for pulling, the extrusion force at the bottom position of the fixed plate 15 is monitored through the pressure sensor. If the extrusion force exceeds the set threshold value, it indicates that the yarn is over-tightened and there is a risk of breakage, and the staff is timely reminded to make adjustments or check. It should be noted that this threshold value can be obtained by continuously increasing the tension at both ends of the yarn until it breaks and monitoring the maximum extrusion force therein, and selecting a value smaller than the maximum extrusion force as the threshold value.

[0026] In the present invention, a tension sensor is connected between the mounting bracket 1 and the first spring 11. The tension sensor is used to monitor the tension value of the first spring 11 in real time. During the pulling process, if the tension value monitored by the tension sensor abnormally decreases or the increase amplitude abnormally decreases during the increasing process, it indicates that slippage occurs between the driving rack 8 and the electromagnet block 10, that is, the surface yarn position has too large a tension force. It is necessary to stop pulling in time or remind the staff to make adjustments or check. Therefore, through the setting of the overall pulling structure and the comprehensive judgment of the pressure sensor and the tension sensor, the over-tightening of the yarn during the pulling process can be adaptively adjusted and the staff can be reminded by timely and accurate judgment.

[0027] Example 2: Refer to Figures 1 - 9, An adjustable tensioning mechanism for a warp knitting machine. On the basis of Embodiment 1, the lifting assembly is provided with a sliding sleeve housing 18 fixed to the middle position at the bottom of the movable plate 16. The sliding sleeve housing 18 extends vertically downward. A moving rack 19 is slidably connected in the sliding sleeve housing 18. Both the strip and the tooth block of the moving rack 19 can extend into the sliding sleeve housing 18. And a slider 191 that is slidably fitted to the inner wall of the sliding sleeve housing 18 is fixed to the top end of the moving rack 19. A second spring 20 is connected between the top end of the moving rack 19 and the top inner wall of the sliding sleeve housing 18. The lifting assembly is further provided with a shaft rod 21. Both ends of the shaft rod 21 are rotatably connected to the mounting frame 1. The shaft rod 21 is located below the electric telescopic rod 7. The shaft rod 21 is located on the side of the guide member 2 close to the tensioning roller 5. A first gear 24 that meshes with the moving rack 19 is fixed to the outer wall of the shaft rod 21. A connecting rack 22 is mounted on the outer wall of the driving rack 8 facing the direction of the shaft rod 21. The connecting rack 22 is located at one end of the driving rack 8 close to the guide member 2. An extension rod is mounted between the connecting rack 22 and the driving rack 8. The connecting rack 22 is located above the shaft rod 21. A second gear 23 that meshes with the connecting rack 22 is fixed to the outer wall of the shaft rod 21. In the normal placement state without tensioning, the electric telescopic rod 7 is in the extended state and the electromagnet block 10 is not powered on. The rotating frame 4 is in an inclined state and the rotating frame 4 is inclined upward towards the guide member 2. At this time, the connecting rack 22 and the second gear 23 are already meshed. The first spring 11 connected to the driving rack 8 is in a stretched state to pull and apply force to the driving rack 8 towards the guide roller 3. Through the conduction of the second gear 23, the shaft rod 21 and the first gear 24, an upward force is applied to the moving rack 19. And at this time, the second spring 20 above the moving rack 19 is in a compressed state to upwardly squeeze the movable plate 16 to limit and fix the yarn connected to the winding cylinder. Thus, the elastic force of the second spring 20 is balanced with the elastic force of the first spring 11 and the tension force of the yarn to maintain the limiting effect on the yarn at the position of the guide member 2. And ensure the tension state of the yarn between the two tensioning rollers 5 to avoid entanglement caused by loosening and affecting the next tensioning operation. And along with the operation of the rear machine, adaptive adjustment is carried out through the mobility of the tensioning rollers. At the same time, when the rear machine pulls the yarn when not tensioning, the greater the upward extrusion force of the second spring 20 and the movable plate 16, so as to avoid affecting the yarn at the position of the winding cylinder. Thereby further improving the effectiveness and stability of the continuous intermittent tensioning operation; During the tensioning operation, the electric telescopic rod 7 contracts to move the driving rack 8 towards the guide member 2, causing the short-distance connecting rack 22 to quickly leave the second gear 23. At this time, there is no force application operation on the outer wall of the shaft rod 21. Under the action of gravity, the moving rack 19 naturally falls and the second spring 20 is in a natural elongation state, loosening the yarn between the movable plate 16 and the fixed plate 15 to ensure the effectiveness of the tensioning operation.

[0028] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. An adjustable pulling mechanism for a warp knitting machine, comprising a mounting frame (1), two guiding members (2) are arranged on one side of the mounting frame (1), and two guiding rollers (3) are arranged on the other side of the mounting frame (1), characterized in that, Rotating frames (4) are rotatably arranged at the middle positions of both ends of the mounting frame (1). Two traction rollers (5) are fixed between the two rotating frames (4). A ring gear (6) is fixed to the outer wall of one of the rotating frames (4). A horizontally extending driving rack (8) meshes with the circumferential outer wall of the ring gear (6). An electric telescopic rod (7) is arranged at a position far from the ring gear (6) of the driving rack (8). The electric telescopic rod (7) is arranged in parallel with the driving rack (8). An electromagnetic block (10) is installed at the telescopic end of the electric telescopic rod (7). A chute (801) is opened at a position on the outer wall of the driving rack (8) corresponding to the electromagnetic block (10). The length of the chute (801) is greater than the length of the electromagnetic block (10). After the electromagnetic block (10) is electrified, it is magnetically adsorbed to the inner wall of the chute (801).

2. The adjustable pulling mechanism of a warp knitting machine according to claim 1, characterized in that, A first limiting groove (12) is opened at a position on the end face of the mounting frame (1) corresponding to the driving rack (8). Two first limiting rods (13) are fixed to the driving rack (8) in the direction towards the first limiting groove (12). The first limiting rods (13) are slidably connected to the inner wall of the first limiting groove (12). A first limiting plate (14) is fixed between the ends of the two first limiting rods (13) far from the driving rack (8).

3. The adjustable pulling mechanism of a warp knitting machine according to any one of claims 1 to 2, characterized in that, The driving rack (8) is located below the ring gear (6). A first spring (11) is connected between one end of the driving rack (8) towards the guiding roller (3) and the mounting frame (1).

4. The adjustable pulling mechanism of a warp knitting machine according to claim 3, characterized in that, The two guiding members (2) are provided with a fixed plate (15) and a movable plate (16). The fixed plate (15) is located above the movable plate (16). Both sides of the fixed plate (15) and the movable plate (16) are provided with arc-shaped structures arched outwards.

5. The adjustable pulling mechanism of a warp knitting machine according to claim 4, characterized in that, The two ends of the fixed plate (15) are fixedly connected to the mounting frame (1). Two second limiting rods (161) are installed at both ends of the movable plate (16). Second limiting grooves (17) extending vertically are opened at positions on the mounting frame (1) corresponding to the second limiting rods (161). Second limiting plates are fixed at both ends of the outer wall of the second limiting rods (161) located in the second limiting grooves (17). A jacking assembly is connected below the movable plate (16).

6. The adjustable pulling mechanism of a warp knitting machine according to claim 5, characterized in that, The jacking assembly is provided with a sliding sleeve housing (18) fixed at the middle position of the bottom of the movable plate (16). The sliding sleeve housing (18) extends vertically downwards. A moving rack (19) is slidably connected in the sliding sleeve housing (18). A second spring (20) is connected between the top end of the moving rack (19) and the inner wall of the top of the sliding sleeve housing (18).

7. The adjustable pulling mechanism of a warp knitting machine according to claim 6, characterized in that, The jacking assembly is further provided with a shaft rod (21). The two ends of the shaft rod (21) are rotatably connected to the mounting frame (1). The shaft rod (21) is located below the electric telescopic rod (7). A first gear (24) meshing with the moving rack (19) is fixed to the outer wall of the shaft rod (21).

8. The adjustable pulling mechanism of a warp knitting machine according to claim 7, characterized in that, A connecting rack (22) is installed on the outer wall of the driving rack (8) in the direction towards the shaft rod (21). The connecting rack (22) is located at one end of the driving rack (8) close to the guiding member (2). A second gear (23) meshing with the connecting rack (22) is fixed to the outer wall of the shaft rod (21).

9. The adjustable pulling mechanism of a warp knitting machine according to claim 4, characterized in that, An installation groove is formed at the bottom of the fixed plate (15). An extrusion sheet is arranged in the installation groove. The extrusion sheet is arranged parallel to the fixed plate (15) in the horizontal direction. A pressure sensor is connected between the extrusion sheet and the installation groove. During the pulling process when the electric telescopic rod (7) contracts, the extrusion force at the bottom position of the fixed plate (15) is monitored through the pressure sensor. If the extrusion force exceeds the set threshold value, it indicates that the yarn is overly tensioned and there is a risk of breakage, and the staff is reminded in a timely manner.

10. The adjustable pulling mechanism of a warp knitting machine according to claim 9, characterized in that, A tension sensor is connected between the mounting bracket (1) and the first spring (11). The tension sensor is used to monitor the tension value of the first spring (11) in real time. During the pulling process, if the tension value monitored by the tension sensor decreases abnormally or the increase amplitude decreases abnormally during the increasing process, it indicates that the tension of the yarn position is too large, and the staff is reminded in a timely manner.

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