A weft selection trolley with yarn tension adjustment function

Abstract

This invention relates to the field of warp knitting machines, and more particularly to a weft selection trolley with yarn tension adjustment function. The trolley includes a weft selection trolley unit. By using a capacitive proximity switch, the yarn tension can be monitored in real time. When the yarn is slack, the capacitive proximity switch does not send a signal, and the system automatically triggers the tension adjustment mechanism. A drive mechanism pulls the component mounting plate to ensure the yarn is always taut, effectively preventing yarn slack during weft laying and achieving automatic yarn tension adjustment. Furthermore, the adjustment unit controls all yarn clamping units to clamp the yarn. The adjustment mechanism synchronizes the yarn clamping of the clamping components with the capacitive proximity switch. In conjunction with the guide frame, a single component mounting plate can be adjusted individually while the yarn is clamped. The synchronous adjustment plate drives the clamping components on both sides to move synchronously through a limiting slide groove, ensuring uniform distribution of clamping force, preventing yarn deviation or twisting, and improving weft laying quality.

Description

Technical Field

[0001] This invention relates to the field of warp knitting machine technology, and in particular to a weft selection trolley with yarn tension adjustment function. Background Technology

[0002] A warp knitting machine is a mechanical device used to produce knitted fabrics. The weft selection carriage is a key component of the warp knitting machine, responsible for taking the yarn from the weft selection device and laying it on the machine. In existing technology, the weft selection carriage often suffers from problems such as yarn slack and uneven tension during the clamping and conveying of yarn due to the lack of an effective automatic yarn tension detection and adjustment mechanism. This results in uneven weft laying, easy yarn shedding or breakage, seriously affecting knitting quality and production efficiency. Traditional weft selection carriages rely heavily on manual tension adjustment, which is not only inefficient but also difficult to ensure consistency. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a weft selection trolley with yarn tension adjustment function.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A weft selection trolley with yarn tension adjustment function includes a weft selection trolley unit, which is slidably fitted on a sliding frame. The weft selection trolley unit includes a frame, and a clamping unit mounting plate is horizontally arranged at the bottom of the frame. Multiple yarn clamping units are evenly arranged in the transverse direction on the upper surface of the clamping unit mounting plate, and adjustment units are symmetrically arranged on the outer surfaces of the two side plates of the frame.

[0006] The yarn clamping unit includes a component mounting plate, a drive mechanism, a guide frame, an adjusting component, a switch mounting frame, a capacitive proximity switch, a clamping component mounting frame, a clamping component, and a synchronous adjusting plate. The drive mechanism is evenly arranged laterally on the upper surface of the clamping unit mounting plate. Guide frames are symmetrically arranged on both sides of the upper surface of the clamping unit mounting plate on the drive mechanism. The component mounting plate is slidably fitted between the guide frames on both sides. An adjusting component is vertically slidably fitted in the middle of the component mounting plate. A clamping component mounting frame is installed at the bottom of the component mounting plate near the drive mechanism, and a switch mounting frame is installed at the bottom of the component mounting plate away from the clamping component mounting frame.

[0007] A capacitive proximity switch is installed on the switch mounting bracket. Clamping components are symmetrically and laterally slidably fitted on the clamping component mounting bracket. A synchronous adjustment plate is vertically slidably fitted between the clamping components located on both sides of the clamping component mounting bracket.

[0008] In addition, a preferred structure is that synchronous pulleys are rotatably provided at both ends of the sliding frame, and synchronous belts are fitted on the synchronous pulleys on both sides. The synchronous belts are used to drive the frame displacement, and a motor assembly for driving the synchronous pulleys to rotate is provided on the frame body on one side of the sliding frame.

[0009] A timing belt pressure plate that cooperates with the timing belt is provided in the middle of the top surface of the frame. Multiple first rollers are evenly arranged and rotated around the timing belt pressure plate on the top surface of the frame. Second rollers are symmetrically rotated and arranged on the top of the outer surface of the side walls of the frame. Eccentric wheels are rotated and arranged below the second rollers on the outer surface of the side walls of the frame. The first rollers, second rollers, and eccentric wheels are slidably engaged on the sliding frame.

[0010] Furthermore, in a preferred configuration, the adjustment unit includes a cylinder mounted on the outer surface of the side walls on both sides of the vehicle frame. A cylinder connecting rod is horizontally mounted at the bottom end of the piston rod at the bottom of the cylinder. A through hole is provided at the end of the cylinder connecting rod away from the cylinder. A connecting plate is mounted at each end of the cylinder connecting rod, and through holes are symmetrically provided on each connecting plate. A pulley pressure plate for pressing down the adjustment component is horizontally mounted between the bottoms of the connecting plates on both sides.

[0011] Furthermore, in a preferred configuration, a sliding seat is symmetrically arranged in the middle of the component mounting plate, and an adjusting component is slidably fitted onto the sliding seat. Slider mounting plates are symmetrically arranged on both sides of one end of the component mounting plate, and a first slider is mounted on each slider mounting plate. The first sliders are slidably fitted onto a guide frame. A piston rod connecting plate is vertically arranged on the upper surface of the end of the component mounting plate closest to the slider mounting plate. The piston rod connecting plate is used to connect the drive mechanism. A connecting wire holder is symmetrically arranged on the upper surface of the end of the component mounting plate furthest from the piston rod connecting plate. The connecting wire holder is used to hold the connecting wire of the capacitive proximity switch, and a connecting wire retainer is installed on the connecting wire holder.

[0012] Furthermore, in a preferred configuration, the drive mechanism includes servo electric cylinders, which are evenly arranged laterally and mounted on the upper surface of the clamping unit mounting plate. A piston rod is mounted on the output end of the servo electric cylinder, and the end of the piston rod away from the servo electric cylinder is mounted and connected to the piston rod connecting plate.

[0013] The guide frame includes a slide rail mounting plate, which is symmetrically mounted on the clamping unit mounting plate and located on both sides of the servo cylinder. A first slide rail is longitudinally arranged on the surface of the slide rail mounting plate near the servo cylinder. A first slider is slidably engaged on the first slide rail. A pulley guide plate is horizontally arranged on the top of the slide rail mounting plate, and the pulley guide plate is used for limiting the adjustment component.

[0014] Furthermore, in a preferred configuration, the adjusting component includes a pulley mounting plate, with first sliding rods symmetrically and vertically arranged at the bottom of the pulley mounting plate. The first sliding rods are slidably fitted onto a sliding seat. Pulleys are symmetrically arranged at the upper surface of the pulley mounting plate. The bottom of the first sliding rods on both sides are horizontally and fixedly connected to clamping plates, with the ends of the clamping plates respectively clamping the switch mounting bracket and the synchronous adjusting plate.

[0015] Furthermore, in a preferred configuration, the switch mounting bracket includes a slide rod mounting top plate, with a second slide rod and a third slide rod vertically mounted on the bottom of the slide rod mounting top plate. A first sliding plate is slidably fitted onto both the second and third slide rods. A first spring is sleeved on the body of the second slide rod, with the bottom of the first spring abutting against the second slide rod and the top of the first spring abutting against the bottom of the first sliding plate. A switch mounting plate for mounting a capacitive proximity switch is fixedly connected to the end of the first sliding plate away from the synchronization adjustment plate.

[0016] In addition, a preferred structure is that the clamping component mounting bracket includes a second slide rail, which is laterally mounted on the bottom of the component mounting plate via a slide rail connecting bracket mounted on its top. Clamping components are laterally symmetrically slidably fitted on the second slide rail, and a slide rod base is mounted on the bottom of the second slide rail.

[0017] The fourth slide rod and the fifth slide rod are vertically arranged on one side of the second slide rail on the upper surface of the slide rod base. The synchronous adjustment plate is slidably fitted on the fourth slide rod and the fifth slide rod. The fifth slide rod is fitted with a second spring.

[0018] Furthermore, in a preferred configuration, the synchronous adjustment plate has symmetrically through-hole limited sliding grooves on both sides, the clamping assembly is slidably engaged in the limited sliding grooves, a second sliding plate is horizontally connected to the top surface of the first sliding plate facing the other side of the synchronous adjustment plate, the second sliding plate and the first sliding plate are locked on both sides of the clamping plate, the second sliding plate is slidably engaged in the fifth sliding rod, the bottom of the second spring abuts against the fifth sliding rod, the top of the second spring abuts against the bottom end of the second sliding plate, and a sliding head is provided on the bottom surface of the synchronous adjustment plate away from the second sliding plate, the sliding head is slidably engaged in the fourth sliding rod.

[0019] In addition, a preferred structure is that the clamping assembly includes a clamping plate connecting frame, a slider connecting plate is provided on the top of the clamping plate connecting frame, a second slider is installed on one side surface of the slider connecting plate, the second slider is slidably engaged on the second slide rail, and a single rod bearing is rotatably provided on the side surface of the slider connecting plate away from the installation of the second slider, the single rod bearing is slidably engaged at the limiting slide groove.

[0020] The bottom of the clamping plate connecting frame is provided with a connecting base plate, and a clamping plate is installed at the connecting base plate. One side surface of the clamping plate is wavy, and multiple rubber strips are evenly arranged on the wavy surface of the clamping plate.

[0021] The beneficial effects of this invention are as follows: By setting a capacitive proximity switch, this invention can monitor the tension of the yarn in real time. When the yarn is slack, the capacitive proximity switch does not send a signal, and the system automatically triggers the tension adjustment mechanism. The drive mechanism pulls the component mounting plate to ensure that the yarn is always in a taut state, effectively avoiding yarn slack during weft laying and realizing automatic adjustment of yarn tension. Furthermore, the adjustment unit can control all yarn clamping units to clamp the yarn. The adjustment component enables the clamping components to clamp the yarn synchronously with the capacitive proximity switch. In addition, with the guide frame, a single component mounting plate can be adjusted individually in the yarn clamping state. The synchronous adjustment plate drives the clamping components on both sides to move synchronously through the limit slide groove, ensuring uniform distribution of clamping force, avoiding yarn deviation or twisting, and improving weft laying quality. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure in which the weft selection trolley unit is mounted on the sliding frame;

[0023] Figure 2 This is a schematic diagram of the structure of the synchronous belt and the weft selection trolley unit.

[0024] Figure 3 This is a structural diagram of the vehicle frame;

[0025] Figure 4 This is a schematic diagram of the structure after the adjustment unit is disassembled;

[0026] Figure 5 This is a schematic diagram of the yarn clamping unit.

[0027] Figure 6 This is a schematic diagram of the drive mechanism;

[0028] Figure 7 This is a schematic diagram of the guide frame structure;

[0029] Figure 8 A schematic diagram of the structure in which the component mounting plate slides onto the guide frame;

[0030] Figure 9 A structural diagram showing the components mounted on a component mounting plate;

[0031] Figure 10 A schematic diagram of the structure after the component mounting plate and adjustment parts have been disassembled;

[0032] Figure 11 This is a structural diagram of the component mounting plate;

[0033] Figure 12 This is a schematic diagram of the adjusting component;

[0034] Figure 13This is a schematic diagram of a capacitive proximity switch mounted on a switch mounting bracket.

[0035] Figure 14 This is a structural schematic diagram of the switch mounting bracket;

[0036] Figure 15 This is a schematic diagram of the disassembled structure of the clamping component mounting bracket, clamping components, and synchronous adjustment plate.

[0037] Figure 16 This is a structural diagram of the mounting bracket for holding components;

[0038] Figure 17 This is a schematic diagram of the synchronous adjustment plate.

[0039] Figure 18 This is a schematic diagram of the clamping assembly.

[0040] In the diagram: 001, Weft selection carriage unit; 002, Sliding frame; 003, Synchronous belt; 004, Motor assembly; 005, Synchronous belt pulley; 01, Frame; 011, First roller; 012, Second roller; 013, Eccentric wheel; 014, Synchronous belt pressure plate; 015, Clamping unit mounting plate; 02, Yarn clamping unit; 03, Adjustment unit; 031, Cylinder; 032, Cylinder connecting rod; 033, Connecting plate; 034, Pulley pressure plate; 1, Component mounting plate; 11, Sliding seat; 12, Piston rod connecting plate; 13, Connecting wire holder; 14, Connecting wire retainer; 15, Slider mounting plate; 16, First slider; 2, Drive mechanism; 21, Servo electric cylinder; 22, Piston rod; 3, Guide frame; 31, Slide rail mounting plate; 32, First slide rail; 33, Pulley guide. 4. Adjusting component; 41. Pulley mounting plate; 42. Pulley; 43. First slide rod; 44. Clamping plate; 5. Switch mounting bracket; 51. Slide rod mounting top plate; 52. Second slide rod; 53. Third slide rod; 54. First spring; 55. First sliding plate; 56. Switch mounting plate; 6. Capacitive proximity switch; 7. Clamping assembly mounting bracket; 71. Slide rail connecting bracket; 72. Second slide rail; 73. Slide rod base; 74. Fourth slide rod; 75. Fifth slide rod; 76. Second spring; 8. Clamping assembly; 81. Second slider; 82. Clamping plate connecting bracket; 821. Slider connecting plate; 822. Connecting base plate; 83. Single rod bearing; 84. Clamping plate; 841. Rubber strip; 9. Synchronous adjusting plate; 91. Limiting groove; 92. Second sliding plate; 93. Sliding head. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Reference Figure 1-18 A weft-selecting trolley with yarn tension adjustment function includes a weft-selecting trolley unit 001, which is slidably fitted on a sliding frame 002. The weft-selecting trolley unit 001 includes a frame 01, and a clamping unit mounting plate 015 is horizontally arranged at the bottom of the frame 01. Multiple yarn clamping units 02 are evenly arranged in a transverse direction on the upper surface of the clamping unit mounting plate 015. Adjustment units 03 are symmetrically arranged on the outer surfaces of the two side plates of the frame 01. The adjustment units 03 are used to open and close the yarn clamping units 02.

[0043] The yarn clamping unit 02 includes a component mounting plate 1, a drive mechanism 2, a guide frame 3, an adjusting component 4, a switch mounting frame 5, a capacitive proximity switch 6, a clamping component mounting frame 7, a clamping component 8, and a synchronous adjusting plate 9. The drive mechanism 2 is evenly arranged laterally on the upper surface of the clamping unit mounting plate 015. Guide frames 3 are symmetrically arranged on both sides of the upper surface of the clamping unit mounting plate 015 on the drive mechanism 2. The component mounting plate 1 is slidably fitted between the guide frames 3 on both sides. An adjusting component 4 is vertically slidably fitted in the middle of the component mounting plate 1. The clamping component mounting frame 7 is installed at the bottom of the component mounting plate 1 near the drive mechanism 2. The switch mounting frame 5 is installed at the other bottom of the component mounting plate 1 away from the clamping component mounting frame 7. A capacitive proximity switch 6 is installed on the switch mounting frame 5. The clamping components 8 are symmetrically slidably fitted laterally on the clamping component mounting frame 7. A synchronous adjusting plate 9 is vertically slidably fitted between the clamping components 8 on both sides of the clamping component mounting frame 7. The synchronous adjusting plate 9 is used to simultaneously adjust the clamping components 8 on both sides.

[0044] In addition, synchronous pulleys 005 are rotatably installed at both ends of the sliding frame 002, and synchronous belts 003 are fitted on the synchronous pulleys 005 on both sides. The synchronous belts 003 are used to drive the frame 01 to move. A motor assembly 004 for driving the synchronous pulleys 005 to rotate is installed on the frame of the sliding frame 002 on one side of the synchronous pulley 005.

[0045] Furthermore, a timing belt pressure plate 014 that cooperates with the timing belt 003 is provided in the middle of the top surface of the frame 01. Multiple first rollers 011 are evenly arranged and rotated around the timing belt pressure plate 014 on the top surface of the frame 01. Second rollers 012 are symmetrically rotated on the top of the outer surface of the side walls of the frame 01. Eccentric wheels 013 are rotated below the second rollers 012 on the outer surface of the side walls of the frame 01. The first rollers 011, second rollers 012, and eccentric wheels 013 are slidably engaged on the sliding frame 002.

[0046] Meanwhile, the adjustment unit 03 includes a cylinder 031, which is installed on the outer surface of the side walls on both sides of the frame 01. A cylinder connecting rod 032 is horizontally installed at the bottom end of the piston rod at the bottom of the cylinder 031. A through hole is opened at the other end of the cylinder connecting rod 032 away from the cylinder 031. A connecting plate 033 is installed at the end of the cylinder connecting rod 032. A through hole is symmetrically opened on the connecting plate 033. A pulley pressure plate 034 for pressing down the adjustment component 4 is horizontally installed between the bottom of the connecting plates 033 on both sides. The pulley pressure plate 034 is used to press down all the pulleys 42.

[0047] Among them, the component mounting plate 1 has a sliding seat 11 symmetrically arranged in the middle of the plate body, and the adjusting component 4 is slidably engaged on the sliding seat 11. The two sides of one end of the component mounting plate 1 are symmetrically arranged with slider mounting plates 15, and the slider mounting plates 15 are each equipped with a first slider 16, which is slidably engaged on the guide frame 3. The upper surface of the end of the component mounting plate 1 near the slider mounting plate 15 is vertically arranged with a piston rod connecting plate 12, which is used to connect the drive mechanism 2. The upper surface of the end of the component mounting plate 1 away from the piston rod connecting plate 12 is symmetrically arranged with a connecting wire holder 13, which is used to hold the connecting wire of the capacitive proximity switch 6. The connecting wire holder 13 is equipped with a connecting wire retainer 14.

[0048] Furthermore, the drive mechanism 2 includes a servo cylinder 21, which is uniformly arranged laterally on the upper surface of the clamping unit mounting plate 015. A piston rod 22 is mounted on the output end of the servo cylinder 21, and the end of the piston rod 22 away from the servo cylinder 21 is mounted and connected to the piston rod connecting plate 12. The guide frame 3 includes a slide rail mounting plate 31, which is symmetrically mounted on the clamping unit mounting plate 015 and located on both sides of the servo cylinder 21. A first slide rail 32 is longitudinally arranged on the side surface of the slide rail mounting plate 31 near the servo cylinder 21. The first slider 16 is slidably engaged on the first slide rail 32. A pulley guide plate 33 is horizontally arranged on the top of the slide rail mounting plate 31. The pulley guide plate 33 is used to limit the adjustment component 4 and to restrict the pulley 42 from sliding at the bottom of its plate.

[0049] In addition, the adjusting component 4 includes a pulley mounting plate 41, with first slide rods 43 symmetrically and vertically arranged at the bottom of the pulley mounting plate 41. The first slide rods 43 are slidably fitted on the sliding seat 11. Pulleys 42 are symmetrically arranged on the upper surface of the pulley mounting plate 41. The bottom of the first slide rods 43 on both sides is horizontally fixedly connected to a clamping plate 44. The two ends of the clamping plate 44 respectively clamp the switch mounting bracket 5 and the synchronous adjusting plate 9.

[0050] Meanwhile, the switch mounting bracket 5 includes a slide rod mounting top plate 51. A second slide rod 52 and a third slide rod 53 are vertically arranged at the bottom of the slide rod mounting top plate 51. A first sliding plate 55 is slidably fitted on both the second slide rod 52 and the third slide rod 53. A first spring 54 is sleeved on the body of the second slide rod 52. The bottom of the first spring 54 abuts against the second slide rod 52, and the top of the first spring 54 abuts against the bottom of the first sliding plate 55. A switch mounting plate 56 for mounting a capacitive proximity switch 6 is fixedly connected to the end of the first sliding plate 55 away from the synchronous adjustment plate 9. The first spring 54 facilitates the reset of the first sliding plate 55.

[0051] Meanwhile, the clamping component mounting bracket 7 includes a second slide rail 72, which is horizontally mounted on the bottom of the component mounting plate 1 via a slide rail connecting bracket 71 mounted on its top. The clamping component 8 is symmetrically slidably fitted on the second slide rail 72. A slide rod base 73 is mounted on the bottom of the second slide rail 72. A fourth slide rod 74 and a fifth slide rod 75 are vertically arranged on the upper surface of the slide rod base 73 on one side of the second slide rail 72. The synchronous adjustment plate 9 is slidably fitted on the fourth slide rod 74 and the fifth slide rod 75. A second spring 76 is sleeved on the fifth slide rod 75. The second spring 76 is used for the reset of the synchronous adjustment plate 9.

[0052] In addition, symmetrical limit grooves 91 are provided on both sides of the synchronous adjustment plate 9. The clamping assembly 8 is slidably engaged in the limit grooves 91. A second sliding plate 92 is horizontally connected to the top of the surface of the first sliding plate 55 on the other side of the synchronous adjustment plate 9. The second sliding plate 92 and the first sliding plate 55 are locked on both sides of the clamping plate 44. The second sliding plate 92 is slidably engaged in the fifth sliding rod 75. The bottom of the second spring 76 abuts against the fifth sliding rod 75, and the top of the second spring 76 abuts against the bottom of the second sliding plate 92. A sliding head 93 is provided on the bottom of the other side of the synchronous adjustment plate 9 away from the second sliding plate 92. The sliding head 93 is slidably engaged in the fourth sliding rod 74. The limit grooves 91 simultaneously drive the clamping assemblies 8 on both sides.

[0053] Meanwhile, the clamping assembly 8 includes a clamping plate connecting frame 82, a slider connecting plate 821 is provided on the top of the clamping plate connecting frame 82, a second slider 81 is installed on one side surface of the slider connecting plate 821, the second slider 81 is slidably engaged on the second slide rail 72, a single rod bearing 83 is rotatably provided on the side surface of the slider connecting plate 821 away from the side surface where the second slider 81 is installed, the single rod bearing 83 is slidably engaged at the limiting slide groove 91, a connecting base plate 822 is provided at the bottom of the clamping plate connecting frame 82, a clamping plate 84 is installed at the connecting base plate 822, one side surface of the clamping plate 84 is wavy, and multiple rubber strips 841 are evenly arranged on the wavy surface of the clamping plate 84 to prevent the yarn from falling off during clamping.

[0054] In this embodiment, the yarn selected by the weft selection trolley is extracted to complete the weft laying work. The synchronous belt 003 is driven by the motor assembly 004. The frame 01 cooperates with the synchronous belt pressure plate 014 to move the first roller 011, the second roller 012, and the eccentric wheel 013 on the sliding frame 002, moving the frame 01 to one end of the yarn exit of the weft selection equipment. At this time, the clamping assembly 8 is in a separated open state. When the yarn is between the clamping assemblies 8 on both sides, the piston rod at the bottom of the cylinder 031 extends and the cylinder connecting rod 032 descends, thereby driving the pulley pressure plate 034 to descend. During the descent of the pulley pressure plate 034, it contacts the pulley 42. As the pulley pressure plate 034 presses down, the first sliding rod 43 descends at the sliding seat 11, thereby driving the clamping plate 44 to press down the first sliding plate 55 and the second sliding plate 92 on both sides.

[0055] After the second sliding plate 92 is pressed down by the clamping plate 44, the sliding head 93 descends and squeezes the second spring 76, causing the second spring 76 to deform and contract. At the same time, the position of the limiting slide groove 91 changes, and the limiting slide groove 91 drives the single rod bearing 83 located therein to move. Under the displacement of the limiting slide groove 91, the single rod bearings 83 on both sides cooperate with the second slider 81 to move at the second slide rail 72, so that the clamping plates 84 on both sides move closer to each other, and finally their wavy surfaces fit together, effectively clamping the yarn with the rubber strip 841.

[0056] As the second sliding plate 92 descends, the first sliding plate 55 descends synchronously. During the descent of the first sliding plate 55, the first spring 54 is compressed and deformed. At the same time, the switch mounting plate 56 drives the monitoring end of the capacitive proximity switch 6 to descend, bringing it close to the yarn below. The capacitive proximity switch 6 sensor has an oscillator inside, and the electric field it generates is distributed on its sensing surface. When the yarn enters this electric field, it causes a change in capacitance, thereby changing the amplitude of the oscillator. When the amplitude change reaches the threshold, the sensor's downstream circuit activates and outputs a signal.

[0057] Once the clamping components 8 have clamped the yarn, the capacitive proximity switch 6 will send a signal to the clamped and tensioned yarn. If no signal is received, it indicates that the yarn is in a loose and collapsed state. At this time, the servo cylinder 21 controls the piston rod 22 to retract, thereby pulling the first slider 16 to slide on the first slide rail 32 through the piston rod connecting plate 12. The pulley 42 will slide into the bottom of the pulley guide plate 33. The pulley guide plate 33 ensures that after the component mounting plate 1 is displaced, the adjusting component 4 remains in a downward state. After the component mounting plate 1 is pulled by the piston rod 22, the clamping components 8 pull the clamped yarn, changing it from a loose state to a tensioned state. When the capacitive proximity switch 6 sends a signal indicating that the yarn has become tensioned, the servo cylinder 21 stops working.

[0058] All capacitive proximity switches 6 send signals indicating that the clamped yarns are in a taut state. Then, the motor assembly 004 drives the frame 01 to move on the sliding frame 002, thereby pulling out all the yarns and laying them on the warp knitting machine. This ensures that all the yarns laid on the warp knitting machine are in a taut state. After the warp knitting machine clamps the laid yarns, the servo cylinder 21 resets and extends the retracted piston rod 22. At this time, the pulley 42 resets to below the pulley pressure plate 034, and the piston rod of the cylinder 031 retracts, causing the pulley pressure plate 034 to rise and reset, no longer pressing the pulley 42. The first sliding plate 55 and the second sliding plate 92 on both sides are reset, releasing the elastic potential energy of the first spring 54 and the second spring 76, which push upwards, thereby driving the clamping plate 44 to reset. The clamping assembly 8 separates to release the yarns, completing the weft laying work.

[0059] In this invention, by setting a capacitive proximity switch 6, the tension of the yarn can be monitored in real time. When the yarn is slack, the capacitive proximity switch 6 does not send a signal, and the system automatically triggers the tension adjustment mechanism. The drive mechanism 2 pulls the component mounting plate 1 to ensure that the yarn is always in a taut state, effectively avoiding yarn slack during the weft laying process. This achieves automatic adjustment of the yarn tension. Furthermore, the adjustment unit 03 can control all the yarn clamping units 02 to clamp the yarn. The adjustment component 4 enables the clamping component 8 to clamp the yarn and the capacitive proximity switch 6 to work synchronously. In addition, with the guide frame 3, a single component mounting plate 1 can be adjusted individually in the yarn clamping state. The synchronous adjustment plate 9 drives the clamping components 8 on both sides to move synchronously through the limiting slide groove 91, ensuring that the clamping force is evenly distributed, avoiding yarn deviation or twisting, and improving the weft laying quality.

[0060] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A weft selection trolley with yarn tension adjustment function, comprising a weft selection trolley unit (001), characterized in that, The weft selection trolley unit (001) is slidably fitted on the sliding frame (002). The weft selection trolley unit (001) includes a frame (01). A clamping unit mounting plate (015) is horizontally arranged at the bottom of the frame (01). Multiple yarn clamping units (02) are evenly arranged in the transverse direction on the upper surface of the clamping unit mounting plate (015). Adjustment units (03) are symmetrically arranged on the outer surfaces of the two side plates of the frame (01). The yarn clamping unit (02) includes a component mounting plate (1), a drive mechanism (2), a guide frame (3), an adjusting component (4), a switch mounting frame (5), a capacitive proximity switch (6), a clamping component mounting frame (7), a clamping component (8), and a synchronous adjusting plate (9). The drive mechanism (2) is evenly arranged in the transverse direction on the upper surface of the clamping unit mounting plate (015). Guide frames (3) are symmetrically arranged on both sides of the upper surface of the clamping unit mounting plate (015) on the drive mechanism (2). The component mounting plate (1) is slidably fitted between the guide frames (3) on both sides. The adjusting component (4) is vertically slidably fitted in the middle of the component mounting plate (1). The clamping component mounting frame (7) is installed at one end of the bottom of the component mounting plate (1) near the drive mechanism (2), and the switch mounting frame (5) is installed at the other end of the bottom of the component mounting plate (1) away from the clamping component mounting frame (7). A capacitive proximity switch (6) is installed on the switch mounting bracket (5), and a clamping component (8) is symmetrically and laterally slidably fitted on the clamping component mounting bracket (7). A synchronous adjustment plate (9) is vertically slidably fitted between the clamping components (8) located on both sides of the clamping component mounting bracket (7). The component mounting plate (1) has a sliding seat (11) symmetrically arranged in the middle of the plate body. The adjusting part (4) is slidably fitted on the sliding seat (11). The two sides of the component mounting plate (1) are symmetrically arranged with slider mounting plates (15). The slider mounting plates (15) are each equipped with a first slider (16). The first sliders (16) are slidably fitted on the guide frame (3). The upper surface of the end of the component mounting plate (1) near the slider mounting plate (15) is vertically arranged with a piston rod connecting plate (12). The piston rod connecting plate (12) is used to connect the drive mechanism (2). The upper surface of the end of the component mounting plate (1) away from the piston rod connecting plate (12) is symmetrically arranged with a connecting wire holder (13). The connecting wire holder (13) is used to hold the connecting wire of the capacitive proximity switch (6). The connecting wire holder (13) is equipped with a connecting wire retainer (14). The adjusting component (4) includes a pulley mounting plate (41), with a first slide rod (43) symmetrically and vertically arranged at the bottom of the pulley mounting plate (41). The first slide rod (43) is slidably fitted on the sliding seat (11). Pulleys (42) are symmetrically arranged on the upper surface of the pulley mounting plate (41). The bottom of the first slide rod (43) on both sides is horizontally fixedly connected to a clamping plate (44). The ends of the clamping plate (44) respectively clamp the switch mounting bracket (5) and the synchronous adjusting plate (9).

2. The weft selection trolley with yarn tension adjustment function according to claim 1, characterized in that, The sliding frame (002) is rotatably provided with synchronous pulleys (005) at both ends, and synchronous belts (003) are fitted on the synchronous pulleys (005) on both sides. The synchronous belts (003) are used to drive the frame (01) to move. The sliding frame (002) is provided with a motor assembly (004) on the frame of the synchronous pulley (005) on one side for driving the synchronous pulley (005) to rotate. The top surface of the frame (01) is provided with a timing belt pressure plate (014) that cooperates with the timing belt (003). Multiple first rollers (011) are evenly arranged and rotated around the timing belt pressure plate (014) on the top surface of the frame (01). Second rollers (012) are symmetrically rotated on the top of the outer surface of the side walls of the frame (01). Eccentric wheels (013) are rotated below the second rollers (012) on the outer surface of the side walls of the frame (01). The first rollers (011), second rollers (012), and eccentric wheels (013) are slidably fitted on the sliding frame (002).

3. The weft selection trolley with yarn tension adjustment function according to claim 1, characterized in that, The adjustment unit (03) includes a cylinder (031), which is installed on the outer surface of the side wall of both sides of the frame (01). A cylinder connecting rod (032) is horizontally installed at the bottom end of the piston rod of the cylinder (031). A through hole is opened at the other end of the cylinder connecting rod (032) away from the cylinder (031). A connecting plate (033) is installed at the end of the cylinder connecting rod (032). A through hole is symmetrically opened on the connecting plate (033). A pulley pressure plate (034) for pressing down the adjustment component (4) is horizontally installed between the bottom of the connecting plates (033) on both sides.

4. The weft selection trolley with yarn tension adjustment function according to claim 1, characterized in that, The drive mechanism (2) includes a servo electric cylinder (21). The servo electric cylinders (21) are evenly arranged in the transverse direction and installed on the upper surface of the clamping unit mounting plate (015). The output end of the servo electric cylinder (21) is equipped with a piston rod (22). The end of the piston rod (22) away from the servo electric cylinder (21) is connected to the piston rod connecting plate (12). The guide frame (3) includes a slide rail mounting plate (31). The slide rail mounting plate (31) is symmetrically mounted on the clamping unit mounting plate (015) and located on both sides of the servo cylinder (21). A first slide rail (32) is longitudinally arranged on the side surface of the slide rail mounting plate (31) near the servo cylinder (21). The first slider (16) is slidably engaged on the first slide rail (32). A pulley guide plate (33) is horizontally arranged on the top of the slide rail mounting plate (31). The pulley guide plate (33) is used for limiting the adjustment component (4).

5. A weft selection trolley with yarn tension adjustment function according to claim 1, characterized in that, The switch mounting bracket (5) includes a slide rod mounting top plate (51). A second slide rod (52) and a third slide rod (53) are vertically arranged at the bottom of the slide rod mounting top plate (51). A first sliding plate (55) is slidably fitted on both the second slide rod (52) and the third slide rod (53). A first spring (54) is sleeved on the body of the second slide rod (52). The bottom of the first spring (54) abuts against the second slide rod (52), and the top of the first spring (54) abuts against the bottom of the first sliding plate (55). A switch mounting plate (56) for mounting a capacitive proximity switch (6) is fixedly connected to the end of the first sliding plate (55) away from the synchronous adjustment plate (9).

6. A weft selection trolley with yarn tension adjustment function according to claim 1, characterized in that, The clamping component mounting bracket (7) includes a second slide rail (72), which is horizontally mounted on the bottom of the component mounting plate (1) via a slide rail connecting bracket (71) mounted on its top. A clamping component (8) is symmetrically slidably fitted on the second slide rail (72), and a slide rod base (73) is mounted on the bottom of the second slide rail (72). The fourth slide rod (74) and the fifth slide rod (75) are vertically arranged on one side of the second slide rail (72) on the upper surface of the slide rod base (73). The synchronous adjustment plate (9) is slidably fitted on the fourth slide rod (74) and the fifth slide rod (75). The fifth slide rod (75) is fitted with a second spring (76).

7. A weft selection trolley with yarn tension adjustment function according to claim 6, characterized in that, The synchronous adjustment plate (9) has symmetrically through-hole limit grooves (91) on both sides of the plate body. The clamping assembly (8) is slidably engaged in the limit grooves (91). The synchronous adjustment plate (9) is horizontally connected to the top of the surface of the first sliding plate (55) on the other side by a second sliding plate (92). The second sliding plate (92) and the first sliding plate (55) are locked on both sides of the clamping plate (44). The second sliding plate (92) is slidably engaged in the fifth sliding rod (75). The bottom of the second spring (76) abuts against the fifth sliding rod (75), and the top of the second spring (76) abuts against the bottom of the second sliding plate (92). The bottom of the other side of the synchronous adjustment plate (9) away from the second sliding plate (92) is provided with a sliding head (93). The sliding head (93) is slidably engaged in the fourth sliding rod (74).

8. A weft selection trolley with yarn tension adjustment function according to claim 7, characterized in that, The clamping assembly (8) includes a clamping plate connecting frame (82), a slider connecting plate (821) is provided on the top of the clamping plate connecting frame (82), a second slider (81) is installed on one side surface of the slider connecting plate (821), the second slider (81) is slidably engaged on the second slide rail (72), and a single rod bearing (83) is rotatably provided on the side surface of the slider connecting plate (821) away from the installation of the second slider (81), and the single rod bearing (83) is slidably engaged at the limiting slide groove (91); The bottom of the clamping plate connecting frame (82) is provided with a connecting base plate (822), and a clamping plate (84) is installed at the connecting base plate (822). One side surface of the clamping plate (84) is wavy, and multiple rubber strips (841) are evenly arranged on the wavy surface of the clamping plate (84).

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