Active yarn feeding compensation device of warp knitting machine

Abstract

The utility model relates to an active yarn feeding compensation device of a warp knitting machine, which comprises base plates and a first yarn guide rod, the base plates are arranged in parallel at intervals, the first yarn guide rod is arranged between the base plates, and two ends of the first yarn guide rod are hinged with the base plates; a plurality of tension pieces perpendicular to the axial direction of the first yarn guide rod are arranged on the first yarn guide rod, one ends of the tension pieces are fixedly connected with the first yarn guide rod, the other ends of the tension pieces are connected into a whole through a cross rod, and the projection of the cross rod on the horizontal plane is located on one side of the first yarn guide rod; one end of the first yarn guide rod penetrates through the base plate and is driven by a motor to rotate; according to the active yarn feeding compensation device of the warp knitting machine, the tension piece is driven to rotate through the first yarn guide rod, then the tightness degree of yarn on the cross rod is controlled, when the yarn rebounds, the tension force of the yarn can be adjusted, the tension force of the yarn during yarn feeding and rebounding is the same, abnormities such as needle disengaging or winding of the yarn can be avoided, and the service life of the yarn is prolonged. The compensation device is simple in structure and accurate and reliable in control.

Description

Technical Field

[0001] The utility model relates to the field of textiles, and particularly relates to an active yarn feeding compensation device for a warp knitting machine. Background Art

[0002] A warp knitting machine is a textile machinery device that uses yarns (such as filaments like polyester, nylon, spandex, etc.) as raw materials, and feeds one or several groups of parallel arranged yarns to all working needles of the machine in the warp direction and forms knitted fabrics by looping simultaneously; warp knitting machines can be divided into groove needle warp knitting machines, latch needle warp knitting machines, crochet needle warp knitting machines, etc. according to the type of knitting needles; during the knitting process, in order to ensure that the yarn can perform the looping action normally, it is necessary to ensure that the yarn has a certain tension; however, during the yarn rebound process, the tension of the yarn is different from that during yarn feeding, and the loose yarn is likely to cause abnormalities such as needle dropout or yarn entanglement; although there is now a method of controlling the tension of the yarn by adjusting the position of the yarn guide rod, the moving mechanism of the yarn guide rod is complex, and the movement of the yarn guide rod is likely to cause the shaking of the equipment, affecting the stability and accuracy of the equipment operation. Content of the Utility Model

[0003] The utility model relates to an active yarn feeding compensation device for a warp knitting machine, which drives the rotation of a tension piece through a first yarn guide rod, and then controls the tightness of the yarn on the cross bar; when the yarn rebounds, the tension of the yarn on the cross bar can be adjusted to ensure that the tension of the yarn during yarn feeding and rebound is the same, and abnormalities such as needle dropout or entanglement of the yarn can be avoided; the compensation device has a simple structure and accurate and reliable control, and the rotational adjustment and control method can reduce the shaking of the equipment, and effectively improve the knitting accuracy and the service life of the equipment.

[0004] The technical solution of the utility model is as follows:

[0005] An active yarn feeding compensation device for a warp knitting machine, comprising a substrate arranged in parallel at intervals and a first yarn guide rod arranged between the substrates, both ends of the first yarn guide rod are hinged to the substrate; a plurality of tension pieces perpendicular to the axial direction of the first yarn guide rod are arranged on the first yarn guide rod, one end of the tension piece is fixedly connected to the first yarn guide rod, and the other ends of the tension pieces are connected into a whole through a cross bar, and the projection of the cross bar on the horizontal plane is located on one side of the first yarn guide rod; one end of the first yarn guide rod passes through the substrate and is driven to rotate by a motor.

[0006] Wherein, a transmission mechanism is arranged between the first yarn guide rod and the motor, the transmission mechanism includes an eccentric wheel connected to the motor and a planetary gear arranged at the circumference of the eccentric wheel, and the shaft extension end of the motor is fixedly connected to the eccentric side of the eccentric wheel; a piston rod is hinged to the planetary gear, one end of the piston rod far away from the planetary gear is hinged to a connecting rod, and the other end of the connecting rod far away from the piston rod is fixedly connected to the first yarn guide rod.

[0007] Among them, a flange is arranged at the circumference of the eccentric wheel, and the planetary wheel includes a first rotating wheel and a second rotating wheel, the distance between the first rotating wheel and the second rotating wheel is equal to the thickness of the flange, the first rotating wheel is rollingly arranged on the inner wall of the flange, and the second rotating wheel is rollingly arranged on the outer wall of the flange; the axial extension end of the second rotating wheel is hinged to the piston rod.

[0008] Wherein, a fixing seat is arranged on the side wall of the first yarn guide rod, and one end of the tension piece away from the cross bar is detachably connected to the fixing seat.

[0009] Wherein, the base plate is provided with a bearing at the connection between the base plate and the first yarn guide rod, the two ends of the first yarn guide rod are respectively connected to the inner ring of the bearing, and the outer ring of the bearing is fixedly connected to the base plate.

[0010] Wherein, a second yarn guide rod is arranged obliquely above the first yarn guide rod, and the second yarn guide rod is fixedly connected to the base plate; the projection of the second yarn guide rod on the horizontal plane is located on the side of the first yarn guide rod away from the cross bar.

[0011] The utility model has the following beneficial effects:

[0012] 1. The tension plate and cross bar of the utility model can adjust the tightness of the yarn; when the yarn rebounds, the tension of the yarn on the cross bar is adjusted to ensure that the tension is the same during yarn feeding and rebounding, which can avoid abnormal occurrences such as yarn falling off the needle or winding.

[0013] 2. The utility model adjusts the tightness of the yarn by rotating the first yarn guide rod, without the need for translation adjustment. The rotary adjustment control method can reduce the shaking of the equipment, and the weaving accuracy and the service life of the equipment can be effectively improved.

[0014] 3. The transmission mechanism of the utility model is an eccentric wheel plus connecting rod structure, which has high transmission efficiency and stable operation; the transmission mechanism occupies a small space and is suitable for the adjustment and arrangement of multiple yarn guide rods.

[0015] 4. The motor of the utility model is preferably a servo motor, which can accurately rotate to a specified angle through the precise control of the controller, thereby driving the movement of the crossbar, and the compensation is accurate and reliable.

[0016] 5. A fixing seat is arranged on the side wall of the first yarn guide rod of the utility model. Since the tension sheet is a wearing part, frequent disassembly and assembly of the tension sheet on the first yarn guide rod can be avoided, which can significantly improve the service life and reliability of the first yarn guide rod.

[0017] 6. The second yarn guide rod of the utility model can increase the pre-tension of the yarn, reduce the compensation range of the compensation device, and further reduce the compensation operation time, which can adapt to the fast weaving operation of the warp knitting machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the present utility model;

[0019] Figure 2 Schematic diagram of another position of the present utility model;

[0020] Figure 3 Partial schematic diagram of the position of the transmission mechanism of the present utility model;

[0021] Figure 4 For the present utility model Figure 3 Enlarged view of the position of the circle.

[0022] The reference numerals in the figure are shown as:

[0023] 1 - Substrate, 2 - First yarn guide rod, 3 - Tension piece, 4 - Cross bar, 5 - Motor, 6 - Eccentric wheel, 601 - Flange, 7 - Planet gear, 701 - First runner, 702 - Second runner, 8 - Piston rod, 9 - Connecting rod, 10 - Fixed seat, 11 - Bearing, 12 - Second yarn guide rod. Specific embodiments

[0024] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Refer to Figures 1 to 4 , a warp knitting machine active yarn feeding compensation device, including a substrate 1 arranged in parallel at intervals and a first yarn guide rod 2 arranged between the substrates 1, both ends of the first yarn guide rod 2 are hinged to the substrate 1; a bearing 11 is arranged on the substrate 1 at its connection with the first yarn guide rod 2, both ends of the first yarn guide rod 2 are respectively connected to the inner ring of the bearing 11, and the outer ring of the bearing 11 is fixedly connected to the substrate 1; multiple first yarn guide rods 2 can be arranged according to the needs of equipment use; a plurality of tension pieces 3 perpendicular to its axis are arranged on the first yarn guide rod 2, one end of the tension piece 3 is fixedly connected to the first yarn guide rod 2, and the other ends of the tension pieces 3 are connected into a whole through a cross bar 4, the projection of the cross bar 4 on the horizontal plane is located on one side of the first yarn guide rod 2, the yarn is placed on the upper end of the cross bar 4, when the yarn rebounds, the cross bar 4 is adjusted to lift, and the tension of the yarn increases, which can ensure that the tension of the yarn is the same when feeding and rebounding, and can avoid abnormal situations such as yarn dropping off the needle or winding; one end of the first yarn guide rod 2 passes through the substrate 1 and is driven to rotate by a motor 5; the motor 5 is preferably a servo motor, which is controlled by a controller and can rotate a specified angle to meet the small-angle adjustment requirements of the first yarn guide rod 2.

[0026] Further, a transmission mechanism is provided between the first yarn guiding rod 2 and the motor 5, and the transmission mechanism includes, but is not limited to, an eccentric connecting rod transmission mechanism; taking the eccentric connecting rod transmission mechanism as an example, the transmission mechanism includes an eccentric wheel 6 connected to the motor 5 and a planetary gear 7 disposed at the circumference of the eccentric wheel 6. The shaft extension end of the motor 5 is fixedly connected to the eccentric side of the eccentric wheel 6. When the motor 5 rotates, the eccentric wheel 6 performs eccentric rotation; a piston rod 8 is hinged on the planetary gear 7, and one end of the piston rod 8 away from the planetary gear 7 is hinged to a connecting rod 9. The end of the connecting rod 9 away from the piston rod 8 is fixedly connected to the first yarn guiding rod 2. When the piston rod 8 drives the connecting rod 9 to rotate, the first yarn guiding rod 2 rotates synchronously; the first yarn guiding rod 2 adjusts the tightness of the yarn by rotation without translational adjustment. The rotational adjustment control method can reduce the shaking of the equipment, and effectively improve the knitting accuracy and the service life of the equipment.

[0027] Further, referring to Figure 3 and 4 , a flange 601 is provided at the circumference of the eccentric wheel 6. The planetary gear 7 includes a first runner 701 and a second runner 702. The distance between the first runner 701 and the second runner 702 is equal to the thickness of the flange 601. The first runner 701 is rollingly disposed on the inner sidewall of the flange 601, and the second runner 702 is rollingly disposed on the outer sidewall of the flange 601. Under the clamping of the first runner 701 and the second runner 702, the planetary gear 7 can rotate around the circumference of the eccentric wheel 6; the shaft extension end of the second runner 702 is hinged to the piston rod 8; this eccentric connecting rod transmission mechanism occupies a small space and is suitable for the adjustment and arrangement of multiple yarn guiding rods.

[0028] Further, referring to Figure 2 , a fixing seat 10 is provided on the side wall of the first yarn guiding rod 2. The end of the tension piece 3 away from the cross bar 4 is detachably connected to the fixing seat 10; since the tension piece 3 is a vulnerable part, it is possible to avoid frequently disassembling and assembling the tension piece 3 on the first yarn guiding rod 2, and can significantly improve the service life and reliability of the first yarn guiding rod 2.

[0029] Further, a second yarn guiding rod 12 is provided obliquely above the first yarn guiding rod 2, and the second yarn guiding rod 12 is fixedly connected to the substrate 1; the projection of the second yarn guiding rod 12 on the horizontal plane is located on the side of the first yarn guiding rod 2 away from the cross bar 4; the second yarn guiding rod 12 can increase the pre-tension of the yarn, reduce the compensation range of the compensation device, and further reduce the compensation running time, and can adapt to the rapid knitting operation of the warp knitting machine.

[0030] The working principle of the present utility model:

[0031] Before knitting, the yarn is first passed between the first yarn guide rod 2 and the second yarn guide rod 12, then laid on the cross bar 4, and finally connected to structures such as the yarn guide needle and the comb. During knitting, when feeding the yarn, a tension force is generated between the first yarn guide rod 2, the second yarn guide rod 12 and the knitting structure, and the yarn can complete the loop-making action normally. When the yarn rebounds, the controller controls the motor 5 to rotate, and the first yarn guide rod 2 rotates synchronously under the drive of the transmission mechanism, so that the tension piece 3 and the cross bar 4 are lifted to increase the tension force of the yarn, making the tension force of the yarn during rebound the same as that during yarn feeding. When it is necessary to replace the tension piece 3, it can be directly removed from the fixed seat 10 without disassembling and assembling on the first yarn guide rod 2.

[0032] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An active yarn feeding compensation device for a warp knitting machine, characterized in that: The invention comprises base plates (1) arranged in parallel and spaced relation and a first yarn guide rod (2) arranged between the base plates (1), wherein the two ends of the first yarn guide rod (2) are hinged to the base plates (1); the first yarn guide rod (2) is provided with a plurality of tension plates (3) perpendicular to its axial direction, one end of the tension plates (3) is fixedly connected to the first yarn guide rod (2), and the other end of the tension plates (3) is connected to the first yarn guide rod (2) via a cross bar (4), and the projection of the cross bar (4) on a horizontal plane is located on one side of the first yarn guide rod (2); one end of the first yarn guide rod (2) passes through the base plate (1) and is driven to rotate by a motor (5).

2. The active yarn feeding compensation device for a warp knitting machine according to claim 1, characterized in that: A transmission mechanism is arranged between the first yarn guide rod (2) and the motor (5), the transmission mechanism comprising an eccentric wheel (6) connected to the motor (5) and a planetary wheel (7) arranged at the circumference of the eccentric wheel (6), the shaft extension end of the motor (5) is fixedly connected to the eccentric side of the eccentric wheel (6); a piston rod (8) is hinged on the planetary wheel (7), a connecting rod (9) is hinged on the end of the piston rod (8) away from the planetary wheel (7), and the end of the connecting rod (9) away from the piston rod (8) is fixedly connected to the first yarn guide rod (2).

3. The active yarn feeding compensation device for a warp knitting machine as claimed in claim 2, characterized in that: The eccentric wheel (6) is provided with a flange (601) at the circumference, and the planetary wheel (7) comprises a first rotating wheel (701) and a second rotating wheel (702), the spacing between the first rotating wheel (701) and the second rotating wheel (702) is equal to the thickness of the flange (601), the first rotating wheel (701) is rollingly arranged on the inner wall of the flange (601), and the second rotating wheel (702) is rollingly arranged on the outer wall of the flange (601); the axial extension end of the second rotating wheel (702) is hinged to the piston rod (8).

4. The active yarn feeding compensation device for a warp knitting machine according to claim 1, characterized in that: A fixing seat (10) is provided on the side wall of the first yarn guide rod (2), and one end of the tension sheet (3) away from the cross bar (4) is detachably connected to the fixing seat (10).

5. The active yarn feeding compensation device for a warp knitting machine according to claim 1, characterized in that: The base plate (1) is provided with a bearing (11) at the connection between it and the first yarn guide rod (2); the two ends of the first yarn guide rod (2) are respectively connected to the inner ring of the bearing (11); and the outer ring of the bearing (11) is fixedly connected to the base plate (1).

6. The active yarn feeding compensation device for a warp knitting machine according to claim 1, characterized in that: A second yarn guide rod (12) is arranged obliquely above the first yarn guide rod (2), and the second yarn guide rod (12) is fixedly connected to the base plate (1); the projection of the second yarn guide rod (12) on the horizontal plane is located on the side of the first yarn guide rod (2) away from the cross bar (4).

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