A high speed wire feeding mechanism

Abstract

The application discloses a high-speed wire feeding mechanism, which comprises a base plate, movable seats and fixed seats arranged on the base plate, and wire feeding roller assemblies arranged on the movable seats and the fixed seats and oppositely distributed, each of the wire feeding roller assemblies comprises an elastic support frame and a conveying roller body arranged at an inner end of the elastic support frame, and a driving device arranged on the base plate. The two groups of wire feeding roller assemblies are provided with the characteristic of relative gap adjustment, the conveying gap can be pre-adjusted according to the size of the wire, the position of the conveying roller body can be adaptively adjusted according to the deformation of the wire through the elastic support frame, the two groups of conveying roller bodies can be adaptively centered and uniformly adjusted to the pressure of the wire, in addition, the two groups of conveying roller bodies are synchronously and uniformly rotated to the middle and the wire is conveyed, so that the uniformity of the conveying pressure on both sides of the wire is further ensured.

Description

Technical Field

[0001] This invention relates to the field of 3D filament conveying equipment technology, specifically a high-speed filament feeding mechanism. Background Technology

[0002] The filament feeding mechanism is one of the core components of a fused deposition modeling (FDM / FFF) 3D printer. It is responsible for feeding the filament (such as PLA, ABS, etc.) stably and accurately into the hot end for melting and extrusion. However, the existing filament feeding mechanisms of 3D printers have certain shortcomings in actual use.

[0003] First, the existing wire feeding mechanism has a fixed gap in the wire feeding cavity, resulting in a limited range of adaptability.

[0004] Secondly, because the filament is easily deformed by the external environment, the feeding mechanism cannot transport the filament well.

[0005] Secondly, the feeding mechanism has difficulty adjusting the pressure on both sides of the filament at the same speed, in a synchronized and uniform manner, which affects the feeding of some filaments. For example, for ultra-hard materials such as carbon fiber, it is easy to cause slippage; for ultra-soft materials such as TPU, it is easy to cause severe flattening of the filament cross section, making it difficult to enter the guide tube smoothly or causing local bending during feeding.

[0006] Therefore, a high-speed wire feeding mechanism is proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a high-speed filament feeding mechanism. The mechanism is equipped with two sets of filament feeding roller assemblies, which have the characteristic of relative gap adjustment. The conveying gap can be pre-adjusted according to the filament size to improve the applicability. The elastic support frame on which they are located can adapt to the deformation of the filament, so that the two sets of conveying rollers can be aligned and the pressure of the conveying rollers on the filament can be adjusted evenly to ensure the quality of filament conveying. In addition, under the action of the driving device, the two sets of conveying rollers achieve synchronous and same speed and rotate towards the center to convey the filament, further ensuring the uniformity of the conveying pressure on both sides of the filament.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-speed wire feeding mechanism, comprising:

[0009] The system includes a substrate; a movable seat and a fixed seat disposed on the substrate; and wire feeding roller assemblies disposed on the movable seat and the fixed seat and distributed opposite to each other. Each set of wire feeding roller assemblies includes an elastic support frame and a conveying roller body disposed at the inner end of the elastic support frame. The conveying roller bodies on both sides are used to convey filaments. The elastic support frame can adaptively center and achieve uniform pressure distribution. The system also includes a driving device disposed on the substrate for driving the two sets of conveying roller bodies to rotate synchronously, at the same speed, and towards the center to convey filaments. The conveying roller bodies disposed on the movable seat can move horizontally relative to the driving device to adjust the gap between the two sets of conveying roller bodies to meet the conveying process of different filaments.

[0010] Preferably, each set of elastic support frames consists of two parallel arrangement. Each elastic support frame includes a mounting frame, slide rails symmetrically distributed on opposite sides of the mounting frame, a slider in each slide rail for assembling the conveyor roller, a through hole in the mounting frame, a telescopic rod in the through hole, a mounting component fixed to one end of the telescopic rod, a transmission gear rotatably mounted on the mounting component via a pin, a connecting block fixed to the other end of the telescopic rod, a first spring on the outer wall of the telescopic rod between the connecting block and the mounting frame, and racks fixed to the opposite sides of the two sliders and meshing with the transmission gear.

[0011] Preferably, each set of conveying rollers includes a mounting block fixed at the end of each slider away from the connecting block, and a first horizontal shaft rotatably mounted between the two upper mounting blocks and the two lower mounting blocks, respectively. A guide roller is fixed in the middle of each first horizontal shaft for contacting the filament and conveying the filament downward.

[0012] Preferably, the drive device includes two sets of pulley assemblies respectively connected to one end of two sets of conveying rollers, each set of pulley assemblies including a transmission wheel fixed to one end of two first horizontal shafts; and a second horizontal shaft rotatably mounted on the mounting member near the transmission wheel, the second horizontal shaft having a compensation wheel fixed on it; it also includes a transmission belt sleeved on the two transmission wheels and the compensation wheel; and a coaxial meshing transmission assembly for the two sets of pulley assemblies to run synchronously, at the same speed and in opposite directions.

[0013] Preferably, the coaxial meshing transmission assembly includes brackets fixed at both ends of the base plate, with a spline shaft rotatably mounted on opposite ends of the two brackets; and two spline sleeves splinedly connected to the spline shaft, wherein a drive wheel sleeved on the spline shaft is symmetrically fixed on opposite sides of the two spline sleeves, and the drive wheel can mesh with a driven wheel fixed on a corresponding second horizontal shaft; it also includes C-shaped frames symmetrically fixed on the movable seat and the fixed seat, each C-shaped frame having a transversely sliding transmission plate, wherein a second spring is connected to the inner wall of the C-shaped frame on one side of the transmission plate, and a first transmission frame is fixed on the other side, and a through slot opened on the upper part of the first transmission frame is rotatably mounted with the corresponding second horizontal shaft; and a second transmission frame symmetrically fixed on opposite sides of the two transmission plates, wherein the end of the second transmission frame away from the transmission plate is sleeved on the spline shaft and rotatably mounted with the corresponding spline sleeve.

[0014] Preferably, the movable seat includes a limiting groove formed on one side of the substrate, a limiting block provided in the limiting groove; and an assembly block fixed to the upper surface of the substrate, wherein a screw is provided inside a threaded groove formed on the assembly block, and a handle is fixed to one end of the screw, and the other end is rotatably connected to an mounting ring provided on the limiting block.

[0015] Preferably, one of the sets of elastic support frames has a mounting base fixed to the top of the two mounting frames, and an inlet sleeve disposed on the mounting base and positioned directly above the two conveying rollers; it also includes an outlet sleeve fixed to the base plate and positioned directly below the two conveying rollers for receiving the filament.

[0016] Preferably, a traction device is provided on one of the mounting blocks on the fixed base for pushing the filament into the inlet sleeve; the traction device includes a vertical plate, a horizontal plate at the top of the vertical plate, and a first drive shaft and a second drive shaft respectively rotatably mounted at both ends of the horizontal plate, wherein a drive roller is fixed on the first drive shaft and the second drive shaft respectively, and a drive belt is sleeved between the two drive rollers; it also includes a first swing arm and a drive rod, wherein one end of the first swing arm is rotatably mounted to the second drive shaft, and the other end of the first swing arm is rotatably mounted to the second swing arm; one end of the drive rod is fixedly connected to the first drive shaft, and the other end of the drive rod is rotatably mounted to the middle of the second swing arm via a rotating shaft; and a mounting post is provided at the end of the second swing arm away from the first swing arm, the mounting post being provided with a check cylinder assembly for pulling the filament; it also includes a positioning roller fixed on the second drive shaft, the filament sequentially passing through the check cylinder assembly, the positioning roller, the inlet sleeve and extending between the two conveying rollers.

[0017] Preferably, the end of the second drive shaft away from the positioning roller passes through the mounting hole opened on the horizontal plate and is fixed with a first drive roller, and a second drive roller is fixed to one of the ends of the first horizontal shaft. A drive belt is sleeved between the second drive roller and the first drive roller.

[0018] Preferably, the check valve assembly includes a cylinder fixed to the mounting post, the cylinder having a wire feeding chamber; and a plurality of tentacles disposed on the inner wall of the wire feeding chamber and longitudinally distributed, wherein the wire feeding chamber is used for the passage of wire, and the inner ends of the tentacles face the upper opening of the wire feeding chamber.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The two sets of wire feeding roller assemblies provided in this invention have the characteristic of relative gap adjustment, which can pre-adjust the conveying gap according to the size of the wire, thereby improving the applicability. The elastic support frame on which they are located can adaptively adjust the position of the conveying rollers according to the deformation of the wire, so as to realize the adaptive centering of the two sets of conveying rollers and uniformly adjust the pressure of the conveying rollers on the wire, ensuring the quality of wire conveying. In addition, under the action of the driving device, the two sets of conveying rollers achieve synchronous and same speed and rotate towards the center to convey the wire, further ensuring the uniformity of the conveying pressure on both sides of the wire.

[0021] 2. As another embodiment of the present invention, the check cylinder assembly provided by the present invention can perform a back-pulling action from bottom to top. Combined with the structural characteristics of the check cylinder assembly, the filament is pulled forward in sequence. At the same time, the positioning roller fixed to the second drive shaft rotates clockwise to further push the filament into the inlet sleeve. This design can advance the filament forward to overcome the problem of the filament being prone to breakage.

[0022] 3. As another embodiment of the present invention, the wire feeding cavity provided in the cylinder can accommodate the wire, and the upward-facing antenna provided in the wire feeding cavity can limit the direction of the wire. When the wire is moving upward along the direction of the antenna, there is no obstruction, while when the wire is moving downward, the antenna can limit the wire. This design can prevent the wire from moving backward. In conjunction with other structures of the traction device, the wire can be pulled forward very well. Attached Figure Description

[0023] Figure 1 This is a first-view three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a second-view three-dimensional structural diagram of the present invention;

[0025] Figure 3 This is a schematic diagram of the third-view three-dimensional structure of the present invention;

[0026] Figure 4 This is a front view structural diagram of the present invention;

[0027] Figure 5 This is a side view of the structure of the present invention;

[0028] Figure 6 This is a top view of the structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the cross-sectional structure of AA;

[0030] Figure 8 A partial cross-sectional structural diagram of the stop return cylinder assembly;

[0031] Figure 9 for Figure 2 A partially enlarged structural diagram;

[0032] Figure 10 for Figure 1 A partially enlarged structural diagram.

[0033] In the diagram: 111, base plate; 1121, limiting groove; 1122, limiting block; 1123, assembly block; 1124, screw; 1125, handle; 1126, mounting ring; 113, fixed seat; 311, mounting frame; 312, slide rail; 313, slider; 314, telescopic rod; 315, mounting component; 316, connecting block; 317, first spring; 318, transmission gear; 319, rack; 411, transmission wheel; 412, second horizontal shaft; 413, compensating wheel; 414, transmission belt; 415, U-shaped frame; 416, transmission plate; 417, second spring; 418, first transmission frame; 419, driven wheel; 420, bracket; 421, splined shaft; 422. Spline sleeve; 423. Drive wheel; 424. Second transmission frame; 425. Motor; 511. Mounting base; 512. Inlet sleeve; 513. Outlet sleeve; 611. Vertical plate; 612. Horizontal plate; 613. First transmission shaft; 614. Second transmission shaft; 615. Transmission roller; 616. Transmission belt; 617. First rocker arm; 618. Second rocker arm; 619. Transmission rod; 620. Mounting column; 621. Check valve assembly; 6211. Cylinder body; 6212. Wire feeding chamber; 6213. Antenna; 623. First drive roller; 624. Second drive roller; 625. Drive belt; 626. Positioning roller; 711. Mounting block; 712. Guide roller. Detailed Implementation

[0034] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. The various embodiments of this invention are described in detail below with reference to the accompanying drawings.

[0035] Example 1

[0036] Please see Figures 1 to 10 The present invention preferably provides a technical solution: a high-speed wire feeding mechanism, comprising: a base plate 111; a movable seat and a fixed seat 113 disposed on the base plate 111; and wire feeding roller assemblies respectively disposed on the movable seat and the fixed seat 113 and distributed relative to each other. Each set of wire feeding roller assemblies includes an elastic support frame and a conveying roller body disposed at the inner end of the elastic support frame. The conveying roller bodies on both sides are used to convey wire. The elastic support frame can adaptively center and achieve uniform pressure distribution. The mechanism also includes a driving device disposed on the base plate 111, which drives the two sets of conveying roller bodies to rotate synchronously, at the same speed, and towards the center to convey wire. The conveying roller body disposed on the movable seat can move horizontally relative to the driving device to realize the gap adjustment of the two sets of conveying roller bodies to meet the conveying process of different wires.

[0037] Combination Figure 1 , 2 As shown in Figures 4 and 6, the movable seat and the fixed seat 113 are respectively disposed on the base plate 111, and the wire feeding roller assembly disposed opposite to each other on the two has the following advantages;

[0038] First, combined Figure 1 As shown, each wire feeding roller assembly consists of an elastic support frame and a conveying roller body at the inner end of the elastic support frame. The conveying roller body is used to convey the wire, while the elastic support frame can adaptively adjust the position of the conveying roller body according to the deformation of the wire during the wire conveying process. At the same time, it can realize the adaptive alignment of the two sets of conveying roller bodies and uniformly adjust the pressure of the conveying roller body on the wire, so as to ensure the quality of wire conveying.

[0039] Secondly, the set drive device, combined with Figure 2 As shown, its function is to drive two sets of conveying rollers to rotate synchronously, at the same speed, and towards the center to convey the filament. This drive device not only serves as the driving source for the two conveying rollers to convey the filament, but also, by driving the two sets of conveying rollers synchronously and at the same speed, further ensures the uniformity of the conveying pressure on both sides of the filament and regulates the tension.

[0040] Furthermore, the movable seat and the fixed seat 113 are disposed on both sides of the base plate 111, in conjunction with... Figure 1 , 2 As shown in Figure 3, the movable seat can drive the wire feeding roller assembly mounted on it to move closer to or further away from the wire feeding roller assembly on the fixed seat 113, thereby adjusting the distance between the two sets of conveying rollers. This allows for pre-adjustment of the conveying gap according to the wire size, improving the practicality of this application.

[0041] The two sets of wire feeding roller assemblies provided in this application have the characteristic of relative gap adjustment, which can pre-adjust the conveying gap according to the wire size, thereby improving the applicability. The elastic support frame on which they are located can adaptively adjust the position of the conveying rollers according to the deformation of the wire, so as to realize the adaptive centering of the two sets of conveying rollers and uniformly adjust the pressure of the conveying rollers on the wire, ensuring the quality of wire conveying. In addition, under the action of the drive device, the two sets of conveying rollers achieve synchronous and same speed and rotate towards the center to convey the wire, further ensuring the uniformity of the conveying pressure on both sides of the wire.

[0042] Furthermore, each set of elastic support frames includes two parallel configurations. Each elastic support frame includes a mounting frame 311, slide rails 312 symmetrically distributed on opposite sides of the mounting frame 311, a slider 313 within each slide rail 312 for assembling the conveyor roller, and a through hole in the mounting frame 311 containing a telescopic rod 314. One end of the telescopic rod 314 is fixed to a mounting component 315, which is rotatably mounted with a transmission gear 318 via a pin. A connecting block 316 is fixed to the other end of the telescopic rod 314. A first spring 317 is provided on the outer wall of the telescopic rod 314 between the connecting block 316 and the mounting frame 311; it also includes a rack 319 that is fixed on the opposite face of the two sliders 313 and meshes with the transmission gear 318; further, each set of conveying rollers includes a mounting block 711 fixed at one end of each slider 313 away from the connecting block 316, and a first horizontal shaft that is rotatably installed between the two upper mounting blocks 711 and the two lower mounting blocks 711, respectively. A guide roller 712 is fixed in the middle of each first horizontal shaft for contacting the filament and conveying the filament downward.

[0043] Combination Figure 1 , 2 As shown in Figure 7, taking a single elastic support frame as an example, two slide rails 312 symmetrically arranged on opposite sides of the mounting frame 311 each contain a slider 313. Each slider 313 is equipped with a mounting block 711. The two mounting blocks 711 in the upper position and the two mounting blocks 711 in the lower position of the two sets of elastic support frames are connected to a guide roller 712 via a first horizontal axis. Figure 1 , 2 As shown, when adjusting the position of the movable seat, the two guide rollers 712 above the movable seat can move closer to or further away from the two guide rollers 712 on the fixed seat 113, thereby adjusting the gap between the two guide rollers 712.

[0044] Furthermore, the telescopic rod 314 on the mounting frame 311 has a transmission gear 318 rotatably mounted on a mounting piece 315 at one end. The transmission gear 318 meshes with racks 319 on two sliders 313 on both sides. The other end is fixed with a connecting block 316. A first spring 317 is connected between the connecting block 316 and the outer wall of the telescopic rod 314, thus connecting the telescopic rod 314 to the mounting frame 311. Figure 7 Therefore, when the filament passes through the four guide rollers 712 containing the two sets of conveying rollers, if the filament undergoes local deformation, such as thermal softening, or if flexible materials like TPU are easily deformed by heat during conveying, resulting in wrinkles, or if the filament expands near the printhead, the guide rollers 712 in contact with the deformed area can adapt to move closer to or further away from the filament. The telescopic rod 314 moves accordingly, and the first spring 317 is compressed or reset accordingly to evenly adjust the tension on both sides of the filament. This design can adapt to filaments of different materials, such as ultra-hard carbon fiber. Excessively tight or loose limits can easily cause the guide rollers 712 to slip with the filament. For ultra-flexible materials such as TPU, it can easily cause severe flattening of the filament cross-section, making it difficult to enter the nozzle smoothly or causing local bending during feeding.

[0045] Furthermore, the drive device includes two sets of pulley assemblies respectively connected to one end of the two sets of conveyor rollers. Each pulley assembly includes a transmission wheel 411 respectively fixed to one end of the two first horizontal shafts; and a second horizontal shaft 412 rotatably mounted on a mounting piece 315 near the transmission wheel 411. A compensation wheel 413 is fixed on the second horizontal shaft 412. It also includes a transmission belt 414 sleeved on the two transmission wheels 411 and the compensation wheel 413; and a coaxial meshing transmission assembly for the two sets of pulley assemblies to run synchronously, at the same speed and in opposite directions.

[0046] Combination Figure 2 , 3 As shown, the two sets of pulley assemblies here correspond one-to-one with the two sets of wire feeding roller assemblies, and the specific combination... Figure 2 Each set of wire feeding roller assemblies has two upper mounting blocks 711 and two lower mounting blocks 711. A transmission wheel 411 is fixed to the end of the first horizontal shaft where each assembly is located. Simultaneously, a compensation wheel 413 is fixed to the second horizontal shaft 412, which is rotatably mounted near the side wall of the mounting piece 315 close to the transmission wheel 411. Figure 4 As shown, a triangular transmission belt 414 is fitted on the transmission wheel 411 and the compensation wheel 413.

[0047] Since the guide roller 712 can adjust its lateral position according to the adaptability of the wire, the two transmission wheels 411 can also adjust their positions. However, in order to ensure the stability of the transmission wheels 411 and the compensation wheel 413, that is, the transmission belt 414 needs to maintain a normal transmission state at all times, the coaxial meshing transmission assembly set here not only drives the two sets of pulley assemblies and the two sets of conveying rollers where the guide roller 712 is located to run synchronously, at the same speed and in opposite directions, but also meets the requirement that the two sets of pulley assemblies follow the corresponding conveying rollers to adjust their lateral positions. Specifically, when the guide roller 712 approaches or moves away from the wire, the telescopic rod 314 can adapt to approach or move away from the wire under the meshing action of the transmission teeth 318 and the rack 319, so that the transmission belt 414 is always in a normal transmission tension state, and at the same time, the transmission wheels 411, the compensation wheel 413 and the triangular transmission belt 414 fitted between them can all be adapted to adjust.

[0048] Furthermore, the coaxial meshing transmission assembly includes brackets 420 respectively fixed at both ends of the base plate 111, with a spline shaft 421 rotatably mounted on opposite ends of the two brackets 420; and two spline sleeves 422 splinedly connected to the spline shaft 421, wherein drive wheels 423 sleeved on the spline shaft 421 are symmetrically fixed on opposite sides of the two spline sleeves 422, and the drive wheels 423 can mesh with driven wheels 419 fixed on the corresponding second transverse shaft 412; it also includes C-shaped frames 415 symmetrically fixed on the movable seat and the fixed seat 113, each A transversely sliding transmission plate 416 is provided inside a C-shaped frame 415. A second spring 417 is connected to the inner wall of the C-shaped frame 415 on one side of the transmission plate 416, and a first transmission frame 418 is fixed on the other side. The through slot opened on the upper part of the first transmission frame 418 is rotatably installed with the corresponding second horizontal shaft 412. A second transmission frame 424 is symmetrically fixed on the opposite sides of the two transmission plates 416. The end of the second transmission frame 424 away from the transmission plate 416 is sleeved on the spline shaft 421 and rotatably installed with the corresponding spline sleeve 422.

[0049] Combination Figure 2 , 3 As shown in Figure 4, two spline sleeves 422 are fitted onto the spline shaft 421, and two symmetrically distributed drive wheels 423 are fixed on opposite sides. Driven wheels 419 fixed to the ends of the two second horizontal shafts 412 can mesh with the corresponding drive wheels 423. When the motor 425 runs and drives the spline shaft 421 to rotate, it drives the second horizontal shafts 412 and compensating wheels 413, where the two pulley assemblies are located, to rotate synchronously and at the same speed. Under the action of the transmission belt 414, the four transmission wheels 411 and the guide rollers 712 are further synchronized and rotate at the same speed. Because the two drive wheels 423 are symmetrical, the guide rollers 712 on both sides achieve opposite operating states. Specifically... Figure 7 As shown, the left guide roller 712 rotates clockwise, and the right guide roller 712 rotates counterclockwise.

[0050] Furthermore, the movable seat includes a limiting groove 1121 formed on one side of the substrate 111, a limiting block 1122 provided in the limiting groove 1121; and an assembly block 1123 fixed on the upper surface of the substrate 111, wherein a screw 1124 is provided in the threaded groove formed on the assembly block 1123, and a handle 1125 is fixed at one end of the screw 1124, and the other end is rotatably connected to the mounting ring 1126 provided on the limiting block 1122.

[0051] As shown in 1, 3, 4, and 7, one end of the screw 1124 is rotatably mounted to the mounting ring 1126 on the limiting block 1122, and the other end is fixed with a handle 1125. When the handle 1125 is rotated, the screw 1124 can move inside the assembly block 1123, thereby pushing the limiting block 1122 to move inside the limiting groove 1121, thus realizing the process of the wire feeding roller assembly on the movable seat moving towards or away from the substrate 111.

[0052] Example 2

[0053] In another embodiment of the present invention, a mounting base 511 is fixed on the top of the two mounting frames 311 where a set of elastic support frames are located, and an inlet sleeve 512 is provided on the mounting base 511 and positioned directly above the two conveying rollers; it also includes an outlet sleeve 513 fixed on the base plate 111 and positioned directly below the two conveying rollers for receiving the wire.

[0054] like Figure 4 As shown, the inlet sleeve 512 and the outlet sleeve 513 are respectively located directly above and below the two sets of conveyor rollers, thereby realizing the feeding and discharging process of the wire.

[0055] Example 3

[0056] In another embodiment of the present invention, a traction device is provided on one of the mounting blocks 711 on the fixed base 113 for pushing the wire into the inlet sleeve 512; the traction device includes a vertical plate 611, a horizontal plate 612 disposed on the top of the vertical plate 611, and a first drive shaft 613 and a second drive shaft 614 respectively rotatably mounted at both ends of the horizontal plate 612, wherein a drive roller 615 is fixed on the first drive shaft 613 and the second drive shaft 614 respectively, and a drive belt 616 is sleeved between the two drive rollers 615; it also includes a first swing rod 617 and a drive rod 619, wherein one end of the first swing rod 617 is rotatably mounted to the second drive shaft 614, and the other end of the first swing rod 617 is rotatably mounted to the second swing rod 618, and one end of the drive rod 619 is fixed to the first drive shaft 613. The system includes a fixed connection, with its other end rotatably mounted to the middle of the second swing arm 618 via a rotating shaft; a mounting post 620 disposed at the end of the second swing arm 618 away from the first swing arm 617, the mounting post 620 being provided with a check cylinder assembly 621 for pulling the filament; a positioning roller 626 fixed on the second drive shaft 614, the filament sequentially passing through the check cylinder assembly 621, the positioning roller 626, the inlet sleeve 512 and extending between the two conveying rollers; furthermore, the end of the second drive shaft 614 away from the positioning roller 626 passes through a mounting hole opened on the horizontal plate 612 and is fixed with a first drive roller 623, and a second drive roller 624 fixed at one end of the first horizontal shaft, a drive belt 625 being sleeved between the second drive roller 624 and the first drive roller 623.

[0057] In this embodiment, combined with Figure 1 , 2 As shown in Figures 7, 9, and 10, a first drive shaft 613 and a second drive shaft 614 are rotatably mounted at both ends of the horizontal plate 612. A drive belt 616 is fitted between two fixed drive rollers 615 on each shaft. A second swing rod 618 connects a first swing rod 617 rotatably mounted on the second drive shaft 614 and a drive rod 619 fixed on the first drive shaft 613. Specifically, one end of the second swing rod 618 is rotatably mounted to the first swing rod 617, its middle part is rotatably mounted to the drive rod 619, and its other end is provided with a mounting post 620. A check cylinder assembly 621 and a positioning roller 626 are respectively mounted on the mounting post 620 and the second drive shaft 614. The filament material of this application passes sequentially through the check cylinder assembly 621, the positioning roller 626, the inlet sleeve 512, and through the two conveying rollers to extend towards the outlet sleeve 513. Figure 7 As shown, when the two sets of conveyor rollers rotate via the drive device, the conveyor rollers connected to the fixed base 113, on the first horizontal shaft, have a second drive roller 624 fixed thereon, and a drive belt 625 is fitted between the second drive roller 624 fixed on the second transmission shaft 614 and the first drive roller 623 fixed thereon. Figure 5 Therefore, in such Figure 7When the left guide roller 712 rotates clockwise, it drives... Figure 9 , 10 The second drive shaft 614 rotates clockwise, which drives the first drive shaft 613 clockwise via the drive belt 616. The drive rod 619 then drives the second rocker arm 618 and the first rocker arm 617 to deflect clockwise, thereby allowing the check cylinder assembly 621 to perform a back-pushing action from bottom to top. Combined with the structural characteristics of the check cylinder assembly 621, the filament is pulled forward. At the same time, the positioning roller 626, which is fixed to the second drive shaft 614, rotates clockwise, further pushing the filament into the inlet sleeve 512. This design can advance the filament forward to overcome the problem of the filament easily breaking.

[0058] Example 4

[0059] In another embodiment of the present invention, the check valve assembly 621 includes a cylinder 6211 fixed to the mounting post 620, the cylinder 6211 having a wire feeding cavity 6212 inside; and a plurality of tentacles 6213 disposed on the inner wall of the wire feeding cavity 6212 and longitudinally distributed, wherein the wire feeding cavity 6212 is used for the passage of the wire, and the inner ends of the tentacles 6213 face the upper opening of the wire feeding cavity 6212.

[0060] Combination Figure 7 , 8 As shown, the wire feeding cavity 6212 inside the cylinder 6211 can accommodate the wire, and the upward-facing antenna 6213 inside the wire feeding cavity 6212 can limit the direction of the wire. When the wire is moving upward along the direction of the antenna 6213, there is no obstruction, while when the wire is moving downward, the antenna 6213 can limit the wire. This design can prevent the wire from moving backward. In conjunction with other structures of the traction device, the wire can be pulled forward very well.

[0061] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Among these, there are various methods of detachable installation, such as using a combination of plug-in and snap-fit, or using bolt connections, etc.

[0062] The above embodiments, which describe the specific features of the present invention, are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made to the present invention by those skilled in the art based on the above description of the invention shall fall within the scope of protection of the present invention.

Claims

1. A high speed wire feeder, characterized by, include: substrate(111); Movable seat and fixed seat (113) provided on the base plate (111); And a wire feeding roller assembly respectively provided on the movable seat and the fixed seat (113) and distributed relative to each other. Each wire feeding roller assembly includes an elastic support frame and a conveying roller body provided at the inner end of the elastic support frame. The conveying roller bodies on both sides are used to convey the wire. The elastic support frame can adaptively center and achieve uniform pressure distribution. It also includes a driving device disposed on the substrate (111) for driving the two sets of conveying rollers to rotate synchronously and at the same speed toward the center and convey the filament. The conveying rollers mounted on the movable seat can move horizontally relative to the drive device to adjust the gap between the two sets of conveying rollers, so as to meet the conveying process of different filaments. Two elastic support frames are arranged side by side in each group. Each elastic support frame includes a mounting frame (311) and slide rails (312) arranged on opposite sides of the mounting frame (311) and symmetrically distributed vertically. Each slide rail (312) is provided with a slider (313) for assembling the conveyor roller. And a through hole is provided in the mounting frame (311), wherein a telescopic rod (314) is provided in the through hole, wherein a mounting part (315) is fixed at one end of the telescopic rod (314), and a transmission gear (318) is rotatably mounted on the mounting part (315) via a pin, and a connecting block (316) is fixed at the other end of the telescopic rod (314), wherein a first spring (317) is provided on the outer wall of the telescopic rod (314) between the connecting block (316) and the mounting frame (311). It also includes racks (319) that are fixed to the opposite surfaces of the two sliders (313) and mesh with the transmission teeth (318). The drive device includes two sets of pulley assemblies that are respectively connected to one end of the two sets of conveying rollers. Each set of pulley assemblies includes a transmission wheel (411) that is respectively fixed to one end of the two first horizontal shafts. And a second horizontal shaft (412) rotatably mounted on the mounting member (315) near the transmission wheel (411), on which a compensation wheel (413) is fixed. It also includes a transmission belt (414) fitted on two transmission wheels (411) and a compensation wheel (413). And coaxial meshing transmission components, used for two sets of pulley assemblies to run synchronously, at the same speed and in opposite directions.

2. The high-speed wire feeding mechanism according to claim 1, characterized in that: Each set of conveying rollers includes a mounting block (711) fixed at one end of each slider (313) away from the connecting block (316), and a first horizontal shaft rotatably mounted between the two upper mounting blocks (711) and the two lower mounting blocks (711), respectively. A guide roller (712) is fixed in the middle of each first horizontal shaft for contacting the filament and conveying the filament downward.

3. The high-speed wire feeding mechanism according to claim 1, characterized in that: The coaxial meshing transmission assembly includes brackets (420) fixed at both ends of the base plate (111), and spline shafts (421) are rotatably mounted on opposite ends of the two brackets (420). And two spline sleeves (422) splinedly connected to the spline shaft (421), wherein the two spline sleeves (422) are symmetrically fixed with drive wheels (423) sleeved on the spline shaft (421) on opposite sides, and the drive wheels (423) can mesh with the driven wheels (419) fixed on the corresponding second horizontal shaft (412); It also includes symmetrically fixed C-shaped frames (415) on the movable seat and fixed seat (113), each C-shaped frame (415) is provided with a transversely sliding transmission plate (416), wherein one side of the transmission plate (416) is connected to the inner wall of the C-shaped frame (415) with a second spring (417), and the other side is fixed with a first transmission frame (418), and the through slot opened on the upper part of the first transmission frame (418) is rotatably installed with the corresponding second transverse shaft (412); And a second transmission frame (424) symmetrically fixed on opposite sides of the two transmission plates (416), wherein one end of the second transmission frame (424) away from the transmission plate (416) is sleeved on the spline shaft (421) and rotatably installed with the corresponding spline sleeve (422).

4. The high-speed wire feeding mechanism according to claim 1, characterized in that: The movable seat includes a limiting groove (1121) formed on one side of the base plate (111), and a limiting block (1122) is provided in the limiting groove (1121). And an assembly block (1123) fixed on the upper surface of the substrate (111), wherein a screw (1124) is provided inside the threaded groove opened on the assembly block (1123), and a handle (1125) is fixed at one end of the screw (1124), and the other end is rotatably connected to the mounting ring (1126) provided on the limiting block (1122).

5. A high-speed wire feeding mechanism according to claim 1, characterized in that: One of the sets of elastic support frames has a mounting base (511) fixed on the top of the two mounting frames (311), and an inlet sleeve (512) set on the mounting base (511) and positioned directly above the two conveying rollers. It also includes an outlet sleeve (513) fixed to the substrate (111) and positioned directly below the two conveying rollers for receiving the filament.

6. A high-speed wire feeding mechanism according to claim 2, characterized in that: A traction device is provided on one of the mounting blocks (711) on the fixed base (113) for pushing the wire into the inlet sleeve (512); The traction device includes a vertical plate (611), a horizontal plate (612) disposed on the top of the vertical plate (611), and a first drive shaft (613) and a second drive shaft (614) respectively rotatably mounted at both ends of the horizontal plate (612). The first drive shaft (613) and the second drive shaft (614) are respectively fixed with drive rollers (615), and a drive belt (616) is sleeved between the two drive rollers (615). It also includes a first rocker arm (617) and a transmission rod (619), wherein one end of the first rocker arm (617) is rotatably mounted to the second transmission shaft (614), and the other end of the first rocker arm (618) is rotatably mounted to it; one end of the transmission rod (619) is fixedly connected to the first transmission shaft (613), and the other end of the transmission rod (619) is rotatably mounted to the middle of the second rocker arm (618) via a rotating shaft; And a mounting post (620) is provided at the end of the second rocker arm (618) away from the first rocker arm (617), and a check cylinder assembly (621) is provided on the mounting post (620) for pulling the wire; It also includes a positioning roller (626) fixed on the second drive shaft (614), the filament passing sequentially through the check cylinder assembly (621), the positioning roller (626), the inlet sleeve (512) and extending between the two conveying rollers.

7. A high-speed wire feeding mechanism according to claim 6, characterized in that: The end of the second drive shaft (614) away from the positioning roller (626) passes through the mounting hole opened on the horizontal plate (612) and is fixed with a first drive roller (623), and a second drive roller (624) is fixed to one of the ends of the first horizontal shaft. A drive belt (625) is sleeved between the second drive roller (624) and the first drive roller (623).

8. A high-speed wire feeding mechanism according to claim 7, characterized in that: The check valve assembly (621) includes a cylinder (6211) fixed to the mounting post (620), and the cylinder (6211) is provided with a wire feeding chamber (6212). And a plurality of tentacles (6213) disposed on the inner wall of the wire feeding cavity (6212) and distributed longitudinally, wherein the wire feeding cavity (6212) is used for the passage of the wire, and the inner end of the tentacles (6213) faces the upper opening of the wire feeding cavity (6212).

Images