Printing nozzle capable of changing flow in real time

Abstract

The invention discloses a printing nozzle capable of changing the flow in real time, and relates to the technical field of 3D printing nozzles. The adjusting part is arranged at an outlet in the bottom of the pipe body and comprises an elastic part, an expansion part and a telescopic part which are sequentially connected from inside to outside; the rhombic frame assembly is arranged at the outlet of the pipe body and is arranged below the expansion part; and the transmission assembly is arranged on the rhombic frame assembly. By means of the rhombic frame assembly, the diameter of the elastic part can be adjusted, the size of the center opening of the expansion part can be adjusted, fine adjustment of the flow of the nozzle is achieved, the transmission assembly adaptively resists different flow pressures in the mode of adjusting the orientation of the center opening of the expansion part, and stable discharging of the adjusting part is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing nozzles, and particularly to a printing nozzle with a real-time variable flow rate. Background Art

[0002] The flow rate of the nozzle needs to be adjusted according to preset parameters or real-time feedback, which may be due to changes in the printing material, different printing speeds, or the need to achieve specific structural effects, such as gradients or complex textures. For example, in 3D printing, different layers may require different extrusion amounts, or when performing multi-material printing, the flow rate needs to be adjusted when switching materials to avoid overflow or shortage. However, the nozzles of existing common FDM (Fused Deposition Modeling) 3D printers usually have a fixed aperture; The flow rate is controlled by adjusting the speed of the feeding motor, but the response speed and accuracy of this method may be limited, especially in cases where rapid changes are required during printing or fluid delivery. In the existing flow aperture size adjustment, during the dynamic adjustment process, in order to meet the aperture change, the aperture position generally needs to be adjusted with deformable materials to meet the aperture expansion. However, when subjected to the spiral extrusion pressure, the outlet is prone to deformation, resulting in an error offset of the aperture and an inability to discharge materials stably and accurately. Summary of the Invention

[0003] The purpose of the present invention is to provide a printing nozzle with a real-time variable flow rate. By setting a diamond frame assembly, the present nozzle can adjust the size of the central opening of the expansion part by adjusting the aperture size of the elastic part, thereby realizing fine adjustment of the nozzle flow rate. The set transmission assembly can adaptively resist different flow pressures by adjusting the orientation of the central opening of the expansion part, ensuring stable discharge of the adjustment part.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A printing nozzle with a real-time variable flow rate, comprising: a tube body; an adjustment part provided at the bottom outlet of the tube body, the adjustment part including an elastic part, an expansion part, and a telescopic part connected in sequence from the inside out. When the aperture of the elastic part changes, the corresponding expansion part expands up and down and the telescopic part expands and contracts. Among them, the elastic part is assembled at the central opening position of the expansion part and is composed of alternately distributed reinforcing ribs and folding parts; and a diamond frame assembly provided at the outlet of the tube body and below the expansion part, wherein the diamond frame assembly is connected to the reinforcing ribs where the elastic part is located and is used to drive the overall expansion or contraction of the elastic part to adjust the flow rate of the nozzle; further comprising a transmission assembly provided on the diamond frame assembly and used to adjust the orientation of the central opening of the expansion part. When the elastic part contracts and reduces the nozzle flow rate, the transmission assembly drives the central opening of the expansion part to lift inward. When the elastic part expands and increases the nozzle flow rate, the transmission assembly drives the central opening of the expansion part downward.

[0005] Preferably, the diamond frame assembly includes a mounting ring fixed to the outlet of the pipe body, a mounting rail annularly fixed to the inner ring of the mounting ring, and first and second sliders arranged inside and outside each mounting rail. Among them, a connecting bar is connected between the first slider and its corresponding reinforcing rib; it also includes a diamond hinge frame. The diamond hinge frame includes a first transmission bar and a second transmission bar that are cross - arranged up and down through a first pin shaft, and the first transmission bar and the second transmission bar are respectively rotatably installed with the adjacent second transmission bar and first transmission bar through a second pin shaft; and connecting rods respectively longitudinally penetrating through each of the first and second sliders, and the two connecting rods can pass through the two corresponding second pin shafts; it further includes an engagement driving assembly for driving one of the first sliders to move in and out to realize the contraction and expansion movement of the diamond hinge frame.

[0006] Preferably, the engagement driving assembly includes a mounting hole opened in the lower part of the pipe body, a slide rail arranged in the mounting hole, and a slide plate slidably installed inside the slide rail. One end of the slide plate extends into the pipe body and is fixed with an extension rod, and an extension block is fixed to the end of the extension rod away from the slide plate. The extension block passes through a through - slot opened on the side wall of one of the mounting rails and is fixed to the corresponding first slider; it also includes a driving rack arranged at the other end of the slide plate; and a mounting frame fixed to the slide rail, and a driving gear meshing with the driving rack is arranged inside the mounting frame; it further includes a second motor arranged on the side wall of the mounting frame and fixed to the driving gear for driving the rotation of the driving gear.

[0007] Preferably, several groups of transmission components are provided and correspond to several groups of connecting rods one by one; each group of transmission components includes a V - shaped track. The V - shaped track is arranged between the two connecting rods and the pipe body, and a transmission track is arranged between the two connecting rods and the expansion part. When the first and second sliders move, under the action of the V - shaped track, the two connecting rods adjust the inclination angle of the central opening of the expansion part through the transmission track; among them, the V - shaped track includes a V - shaped frame fixed to the inner wall of the bottom of the pipe body, a chute is opened on the upper surface of the V - shaped frame, and a transmission frame is fixed to the bottom end of each connecting rod. One end of each transmission frame away from the connecting rod is provided with a roller that can be limited and roll inside the chute; it also includes a spring arranged on the outer wall of the connecting rod between each transmission frame and the mounting rail. When the first and second sliders move outwards, the two connecting rods move adaptively.

[0008] Preferably, the transmission track includes a connecting rail fixed to the bottom of the expansion part, two transmission blocks are arranged inside the connecting rail; and movable blocks are arranged between each transmission block and its corresponding connecting rod.

[0009] Preferably, a plurality of openings are formed in the outer periphery of the tube body, and a feed pipe is fixed to the upper edge of each opening; and a through hole is formed in the middle of the tube body, and a rotatable first transmission sleeve is arranged in the through hole. The device further includes a second transmission sleeve fixed to the bottom of the first transmission sleeve and extending into the tube body, and a plurality of spiral impeller assemblies are longitudinally arranged at the bottom of the second transmission sleeve. Each spiral impeller assembly includes a mounting sleeve, wherein the first mounting sleeve is fixed to the second transmission sleeve; and mounting shafts are rotatably mounted on both sides of the mounting sleeve respectively, and blades are fixed to the outer ends of each mounting shaft. The device further includes a first ratchet transmission assembly and a second ratchet transmission assembly. The first ratchet transmission assembly is used to drive the whole rotation of a plurality of spiral impeller assemblies, and the second ratchet transmission assembly is used to adjust the inclination angle of the blades of a single spiral impeller assembly.

[0010] Preferably, the first ratchet transmission assembly includes an external tooth ring fixed to the outer wall of the first transmission sleeve, and a first motor arranged on the upper surface of the tube body. A first gear body meshing with the external tooth ring is fixed to the output end of the first motor.

[0011] Preferably, the second ratchet transmission assembly includes a cylinder arranged on the top of the first transmission sleeve. The telescopic end of the cylinder passes through a connection hole formed in the top of the first transmission sleeve and is fixed with a connecting shaft; and a plurality of transmission components are arranged at the bottom end of the connecting shaft corresponding to a plurality of spiral impeller assemblies. Each transmission component includes a connecting block, transmission racks are symmetrically fixed to the center of the bottom of the connecting block, and transmission gears are respectively fixed to the opposite ends of the two mounting shafts. The two transmission gears are respectively meshed with the two transmission racks, and the first connecting block is fixed to the connecting shaft, and the transmission racks are fixed between adjacent connecting blocks.

[0012] Preferably, a rotary seal ring is arranged between the first transmission sleeve and the mounting groove in the middle of the tube body.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By arranging the diamond frame assembly, the present invention can adjust the size of the central opening of the expansion part by adjusting the size of the caliber of the elastic part, so as to realize the fine adjustment of the nozzle flow rate. The arranged transmission assembly can adaptively resist different flow pressures by adjusting the orientation of the central opening of the expansion part, so as to ensure the stable discharging of the adjusting part.

[0014] 2. As another implementation manner of the present invention, a first transmission sleeve, a second transmission sleeve, and a plurality of spiral impeller assemblies are sequentially fixed on the pipe body from top to bottom. Among them, the first transmission sleeve is rotatably installed at the top of the pipe body, and for the installation sleeve where each spiral impeller assembly is located, installation shafts are respectively rotatably installed on both sides. At the same time, blades are respectively fixed at the opposite ends of the two installation shafts. Under the action of the first meshing transmission assembly, overall rotation can be achieved. This design not only realizes the mixing of the wire materials but also ensures the conveying efficiency of the wire materials. Under the action of the second meshing transmission assembly, the installation shafts where the plurality of spiral impeller assemblies are located can achieve their own rotation, thereby adjusting the inclination angle of the blades to adapt to different requirements of wire material extrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a first - perspective three - dimensional structural schematic diagram of the present invention; Figure 2 is a second - perspective three - dimensional structural schematic diagram of the present invention; Figure 3 is Figure 1 the front - view structural schematic diagram of Figure 4 is the cross - sectional structural schematic diagram of A - A; Figure 5 is Figure 4 the partial enlarged structural schematic diagram of Figure 6 is Figure 1 the disassembled internal structural schematic diagram of Figure 7 is Figure 6 the partial enlarged structural schematic diagram of Figure 8 is Figure 6 the partial enlarged structural schematic diagram of Figure 9 is the first partial enlarged structural schematic diagram of the meshing drive assembly; Figure 10 is the second partial enlarged structural schematic diagram of the meshing drive assembly; Figure 11 is Figure 6 the front - view structural schematic diagram of Figure 12 is the cross - sectional structural schematic diagram of B - B.

[0016] In the figure: 111, pipe body; 211, first drive sleeve; 212, rotary sealing ring; 213, first motor; 214, first gear body; 215, external tooth ring; 216, cylinder; 217, connecting block; 218, drive rack; 219, drive gear; 311, second drive sleeve; 312, mounting sleeve; 313, mounting shaft; 314, blade; 411, mounting ring; 412, mounting rail; 413, first slider; 414, second slider; 415, first drive bar; 416, second drive bar; 417, connecting bar; 418, elastic part; 4181, reinforcing rib; 4182, folding part; 419, connecting rod; 420, connecting rail; 421, movable block; 423, drive frame; 424, spring; 425, roller; 426, V-shaped frame; 427, chute; 4281, extension part; 4282, telescopic part; 511, slide rail; 512, slide plate; 513, drive rack; 514, mounting frame; 515, drive gear; 516, second motor; 517, extension rod; 518, through groove; 519, extension block; 611, feed pipe. Detailed implementation manners

[0017] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The following describes each embodiment of the present invention in detail with reference to the drawings.

[0018] Embodiment 1 Please refer to Figures 1 to 12, the present invention preferably provides a technical solution: a printing nozzle capable of changing the flow rate in real time, including: a pipe body 111; an adjusting portion provided at the bottom outlet of the pipe body 111, the adjusting portion including an elastic portion 418, an expanding portion 4281, and a telescopic portion 4282 connected in sequence from the inside out. When the caliber of the elastic portion 418 changes, the corresponding expanding portion 4281 expands up and down and the telescopic portion 4282 is telescopically adjusted. Among them, the elastic portion 418 is assembled at the central opening position of the expanding portion 4281 and is composed of staggered reinforcing ribs 4181 and folding portions 4182; and a diamond frame assembly provided at the outlet of the pipe body 111 and located below the expanding portion 4281. Among them, the diamond frame assembly is connected to the reinforcing rib 4181 where the elastic portion 418 is located and is used to drive the overall expansion or contraction of the elastic portion 418 to adjust the flow rate of the nozzle; it also includes a transmission assembly provided on the diamond frame assembly and used to adjust the orientation of the central opening of the expanding portion 4281. When the elastic portion 418 contracts and reduces the nozzle flow rate, the transmission assembly drives the central opening of the expanding portion 4281 to lift inward. When the elastic portion 418 expands and increases the nozzle flow rate, the transmission assembly drives the central opening of the expanding portion 4281 downward.

[0019] In this embodiment, the present application is provided with an adjusting portion capable of adjusting the flow rate at the outlet position of the pipe body 111. Combining Figure 2 as shown, and the adjusting portion includes an elastic portion 418, an expanding portion 4281, and a telescopic portion 4282 connected in sequence from the inside out, as Figure 5 , 7 , 12 shown, where the elastic portion 418 is fixed at the central opening position of the expanding portion 4281; In order to achieve the adjustment of the nozzle flow rate, combining Figure 2 , 5 , 7, 8 shown, the present application is provided with a diamond frame assembly at the outlet position of the pipe body 111. The diamond frame assembly can adjust the size of the central opening of the expanding portion 4281 by adjusting the caliber of the elastic portion 418, thereby realizing the fine adjustment of the nozzle flow rate; Since filaments with different flow rates have different pressures on the elastic portion 418 when flowing through the adjusting portion, in order to ensure the stable discharge of the adjusting portion, the present application is provided with a transmission assembly on the diamond frame assembly. The transmission assembly can adjust the orientation of the central opening of the expanding portion 4281 where the adjusting portion is located, and adaptively resist different flow pressures. Specifically, combining Figure 5 as shown, when the elastic portion 418 is in a contracted state and reduces the nozzle flow rate, at this time the central opening of the expanding portion 4281 shrinks, and the entire adjusting portion is subjected to a large extrusion force of the filaments. In order to ensure the stable discharge of the adjusting portion, at this time, while the diamond frame assembly drives the elastic portion 418 to contract, it drives the transmission assembly to drive the elastic portion 418 to lift and the central opening of the expanding portion 4281 faces upward, and at the same time the telescopic portion 4282 is adaptively telescoped, as Figure 4 , 5as shown in the state, so as to resist the pressure of the wire material discharging on the adjusting part; When the elastic part 418 is in the extended state and the flow rate of the nozzle is increased, the central opening of the expansion part 4281 expands at this time, and the pressure relief ability is strong. Then, the diamond frame assembly drives the transmission assembly to drive the elastic part 418 to move downward, and the central opening of the expansion part 4281 faces downward, providing assistance for the discharging of the wire material; The diamond frame assembly provided in this application can adjust the size of the central opening of the expansion part 4281 by adjusting the caliber of the elastic part 418 to achieve fine adjustment of the nozzle flow rate. The provided transmission assembly adapts to resist different flow pressures by adjusting the orientation of the central opening of the expansion part 4281, ensuring stable discharging of the adjusting part.

[0020] Embodiment 2 As an embodiment for adjusting the caliber of the elastic part 418, the diamond frame assembly includes a mounting ring 411 fixed to the outlet of the pipe body 111, a mounting rail 412 annularly fixed to the inner ring of the mounting ring 411, and first sliders 413 and second sliders 414 arranged inside and outside each mounting rail 412. Among them, a connecting strip 417 is connected between the first slider 413 and its corresponding reinforcing rib 4181; it also includes a diamond hinge frame, which includes a first transmission strip 415 and a second transmission strip 416 arranged crosswise up and down through a first pin shaft, and the first transmission strip 415 and the second transmission strip 416 are respectively rotatably installed with the adjacent second transmission strip 416 and the first transmission strip 415 through a second pin shaft; and connecting rods 419 respectively longitudinally penetrating through each first slider 413 and second slider 414, and the two connecting rods 419 can pass through the two corresponding second pin shafts; it also includes an engagement driving assembly for driving one of the first sliders 413 to move inside and outside, realizing the contraction and expansion movement of the diamond hinge frame.

[0021] Combined Figure 7 、 8 As shown, a number of mounting rails 412 are annularly fixed to the inner ring of the mounting ring 411, and connecting rods 419 are respectively penetrated through the first sliders 413 and second sliders 414 slidably installed in each mounting rail 412. Among them, a connecting strip 417 is connected between the first slider 413 and its corresponding reinforcing rib 4181, and the single first transmission strip 415 and second transmission strip 416 where the diamond hinge frame is located are rotatably installed through a first pin shaft, and the single first transmission strip 415 and second transmission strip 416 are respectively rotatably installed with the adjacent second transmission strip 416 and first transmission strip 415 through a second pin shaft. At the same time, the two connecting rods 419 respectively pass through the two corresponding second pin shafts; Therefore, when the meshing drive assembly drives one of the first sliders 413 to move inward and outward inside the mounting rail 412, at this time, under the drive assembly of the diamond hinge frame, that is, the first drive bar 415 and the second drive bar 416 where the diamond hinge frame is located can be folded or expanded toward each other with the adjacent second drive bar 416 and the first drive bar 415, thereby driving the second slider 414 to move inward and outward; When the first slider 413 moves outward and drives the caliber of the elastic part 418 to gradually increase, combined with Figure 8 As shown, at this time, the first drive bar 415 and the second drive bar 416 where the diamond hinge frame is located can be away from the adjacent second drive bar 416 and the first drive bar 415 in the direction of each other, so as to drive the second slider 414 to move outward while making the first slider 413 and the second slider 414 gradually approach each other, realizing the gradual increase of the central opening caliber of the expansion part 4281. On the contrary, the overall caliber of the elastic part 418 and the central opening caliber of the expansion part 4281 gradually decrease.

[0022] Furthermore, the meshing drive assembly includes a mounting hole opened in the lower part of the pipe body 111. A slide rail 511 is provided in the mounting hole, and a slide plate 512 is slidably mounted inside the slide rail 511. One end of the slide plate 512 extends into the pipe body 111 and is fixed with an extension rod 517. The end of the extension rod 517 away from the slide plate 512 is fixed with an extension block 519. The extension block 519 passes through a through slot 518 opened in the side wall of one of the mounting rails 412 and is fixed to the corresponding first slider 413; it also includes a drive rack 513 provided at the other end of the slide plate 512; and a mounting frame 514 fixed on the slide rail 511. A drive gear 515 meshing with the drive rack 513 is provided inside the mounting frame 514; it also includes a second motor 516 provided on the side wall of the mounting frame 514 and fixed to the drive gear 515 for driving the rotation of the drive gear 515.

[0023] Combined with Figure 1 、 9 、10 shown, the slide rail 511 is fixed inside the mounting hole opened in the lower part of the pipe body 111. For the slide plate 512 provided inside the slide rail 511, an extension block 519 is connected between the extension rod 517 fixed at one end and one of the first sliders 413. At the same time, the extension block 519 can move inward and outward inside the through slot 518 opened in the side wall of the corresponding mounting rail 412; Therefore, when the drive rack 513 fixed to the slide plate 512 moves inward and outward under the action of the drive gear 515 meshing with the drive rack 513, combined with Figure 9 , it can drive one of the first sliders 413 to move inward and outward, and through the diamond hinge frame, realize the synchronous inward and outward movement process of several first sliders 413.

[0024] Embodiment 2 As an embodiment for adjusting the orientation of the central opening of the expansion part 4281, a number of sets of transmission components are provided and correspond to a number of sets of connecting rods 419 one by one; each set of transmission components includes a V-shaped track, the V-shaped track is arranged between two connecting rods 419 and the pipe body 111, and a transmission track is arranged between two connecting rods 419 and the expansion part 4281. When the first slider 413 and the second slider 414 move, under the action of the V-shaped track, the two connecting rods 419 adjust the inclination angle of the central opening of the expansion part 4281 through the transmission track; wherein, the V-shaped track includes a V-shaped frame 426 fixed to the inner wall of the bottom of the pipe body 111, a chute 427 is formed on the upper surface of the V-shaped frame 426, and a transmission frame 423 fixed to the bottom end of each connecting rod 419, and a roller 425 capable of rolling and being limited inside the chute 427 is arranged at one end of each transmission frame 423 away from the connecting rod 419; a spring 424 is further arranged on the outer wall of the connecting rod 419 between each transmission frame 423 and the mounting rail 412. When the first slider 413 and the second slider 414 move outwards, the two connecting rods 419 move adaptively; further, the transmission track includes a connecting rail 420 fixed to the bottom of the expansion part 4281, and two transmission blocks are arranged inside the connecting rail 420; and a movable block 421 is arranged between each transmission block and its corresponding connecting rod 419.

[0025] It is known that the transmission components correspond to the connecting rods 419 one by one. Taking a single transmission component as an example, the two connecting rods 419 respectively pass through the corresponding first slider 413 and the second slider 414 and are downwardly provided with a V-shaped track between them and the pipe body 111, and upwardly provided with a transmission track between them and the expansion part 4281. When the first slider 413 and the second slider 414 move outwards, that is, when the diameter of the elastic part 418 gradually becomes larger, as Figure 5 shown in the state, the rollers 425 respectively fixed to the bottom ends of the two connecting rods 419 can move inside the chute 427 on the upper surface of the V-shaped frame 426. Since the chute 427 is in a V-shaped state, the outer roller 425 gradually moves upwards, and the inner first transmission strip 415 gradually moves downwards. At the same time as this process, the inner connecting rod 419 moves downwards, and the outer connecting rod 419 moves upwards; At the same time, the two top ends of the two connecting rods 419 are respectively hinged to the two transmission blocks inside the connecting rail 420 through the movable blocks 421. When the inner or outer connecting rod 419 moves downwards or upwards respectively, the inner side of the expansion part 4281 can move downwards, and the outer side can move upwards, so as to realize the process of switching the central opening of the expansion part 4281 from facing upwards to facing downwards. Embodiment 4 As another embodiment of the present invention, a plurality of openings are provided on the outer periphery of the pipe body 111, and a feed pipe 611 is fixed to the upper edge of each opening; and a through hole is provided in the middle of the pipe body 111, and a rotatable first transmission sleeve 211 is provided in the through hole. A second transmission sleeve 311 is further included, which is fixed to the bottom of the first transmission sleeve 211 and extends into the pipe body 111, and a plurality of spiral impeller assemblies are longitudinally arranged at the bottom of the second transmission sleeve 311. Each spiral impeller assembly includes a mounting sleeve 312, wherein the first mounting sleeve 312 is fixed to the second transmission sleeve 311; and mounting shafts 313 are respectively rotatably mounted on both sides of the mounting sleeve 312, and blades 314 are fixed to the outer ends of each mounting shaft 313; a first ratchet drive assembly and a second ratchet drive assembly are further included. The first ratchet drive assembly is used to drive the overall rotation of a plurality of spiral impeller assemblies, and the second ratchet drive assembly is used to adjust the inclination angle of the blades 314 where a single spiral impeller assembly is located.

[0026] In this embodiment, a first transmission sleeve 211, a second transmission sleeve 311 and a plurality of spiral impeller assemblies are sequentially fixed on the pipe body 111 from top to bottom. Among them, the first transmission sleeve 211 is rotatably mounted on the top of the pipe body 111, and for each mounting sleeve 312 where a spiral impeller assembly is located, mounting shafts 313 are respectively rotatably mounted on both sides thereof. Figure 4 、 6 As shown in FIGS. 7, at the same time, the blades 314 respectively fixed to the opposite ends of the two mounting shafts 313 can be rotated integrally under the action of the first meshing drive assembly. This design not only realizes the mixing of the wire materials but also ensures the conveying efficiency of the wire materials. Under the action of the second meshing drive assembly, the mounting shafts 313 where a plurality of spiral impeller assemblies are located can rotate themselves, so as to adjust the inclination angle of the blades 314 to adapt to different requirements of wire material extrusion.

[0027] Further, the first ratchet drive assembly includes an external tooth ring 215 fixed to the outer wall of the first transmission sleeve 211, and a first motor 213 provided on the upper surface of the pipe body 111. A first gear body 214 meshing with the external tooth ring 215 is fixed to the output end of the first motor 213.

[0028] As Figure 1 、 4 As shown in FIGS. 6 and 12, the external tooth ring 215 on the first transmission sleeve 211 meshes with the first gear body 214 on the first motor 213. When the first motor 213 operates, it can drive the first transmission sleeve 211 and each structure on the first transmission sleeve 211 to rotate.

[0029] Furthermore, the second rodent drive assembly includes a cylinder 216 disposed on the top of the first drive sleeve 211. The telescopic end of the cylinder 216 passes through a connection hole formed in the top of the first drive sleeve 211 and is fixed with a coupling shaft; and a number of drive components disposed at the bottom end of the coupling shaft corresponding to a number of spiral impeller assemblies. Each drive component includes a connection block 217, drive racks 218 symmetrically fixed to the center of the bottom of the connection block 217, and drive gears 219 respectively fixed to the opposite ends of two mounting shafts 313. Among them, the two drive gears 219 are respectively engaged with the two drive racks 218, and the connection block 217 at the first place is fixed to the coupling shaft, and the drive racks 218 are fixed between adjacent connection blocks 217.

[0030] Combined with Figure 6 、 7 As shown, the coupling shaft provided at the telescopic end of the cylinder 216 is provided with drive components corresponding to a number of spiral impeller assemblies one by one. It is known that each drive component is composed of a connection block 217, two drive racks 218 and two drive gears 219. Among them, the connection block 217 at the first place is fixed to the second drive sleeve 311, and the two drive racks 218 are fixed between adjacent connection blocks 217. The two drive gears 219 are fixed to the opposite ends of the two mounting shafts 313 where the corresponding spiral impeller assemblies are located. When the cylinder 216 expands and contracts to drive the second drive sleeve 311 to move longitudinally, the two drive racks 218 where a number of drive assemblies are located are driven to drive the two drive gears 219 to rotate respectively. It should be noted that the two drive racks 218 are symmetrically distributed to realize the reverse operation of the two drive gears 219, and further realize the reverse adjustment of the inclination angles of the two blades 314.

[0031] Furthermore, a rotary seal ring 212 is provided between the first drive sleeve 211 and the installation groove in the middle of the pipe body 111. Combined with Figure 1 、 4 、6, 12 shown, it ensures the connection sealing performance between the pipe body 111 and the first drive sleeve 211.

[0032] In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Among them, there are various ways of detachable installation. For example, it can be by the way of cooperation of plugging and buckling, or by the way of bolt connection, etc.

[0033] The above combination of embodiments and drawings clearly and completely describes the concept, specific structure and technical effects of the present invention to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present invention. In addition, all the connection / linkage relationships mentioned in the text do not solely refer to the direct connection of components, but rather refer to the formation of a more optimal connection structure by adding or reducing connection accessories according to specific implementation situations.

[0034] The above specific description of the present invention is only for further illustration of the present invention and cannot be understood as a limitation on the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the content of the above invention fall within the scope of protection of the present invention.

Claims

1. A printing nozzle with a flow rate that can change in real time, characterized in that, Comprising: A tube body (111); An adjusting part provided at the bottom outlet of the tube body (111), the adjusting part including an elastic part (418), an expanding part (4281) and a telescopic part (4282) connected in sequence from inside to outside. When the caliber of the elastic part (418) changes, the corresponding expanding part (4281) expands up and down and the telescopic part (4282) is telescopically adjusted. Among them, the elastic part (418) is assembled at the central opening position of the expanding part (4281) and is composed of staggered reinforcing ribs (4181) and folding parts (4182); And a diamond frame assembly provided at the outlet of the tube body (111) and located below the expanding part (4281). Among them, the diamond frame assembly is connected to the reinforcing rib (4181) where the elastic part (418) is located and is used to drive the overall expansion or contraction of the elastic part (418) to adjust the flow rate of the nozzle; It further includes a transmission assembly provided on the diamond frame assembly and used to adjust the orientation of the central opening of the expanding part (4281). When the elastic part (418) contracts and reduces the nozzle flow rate, the transmission assembly drives the central opening of the expanding part (4281) to lift inward. When the elastic part (418) expands outward and increases the nozzle flow rate, the transmission assembly drives the central opening of the expanding part (4281) downward.

2. A printing nozzle capable of changing the flow rate in real time according to claim 1, characterized in that: The diamond frame assembly includes a mounting ring (411) fixed at the outlet of the tube body (111), a mounting rail (412) annularly fixed inside the mounting ring (411), and first sliders (413) and second sliders (414) arranged inside and outside in each mounting rail (412). Among them, a connecting bar (417) is connected between the first slider (413) and its corresponding reinforcing rib (4181); It further includes a diamond hinge frame, the diamond hinge frame including a first transmission bar (415) and a second transmission bar (416) cross - arranged up and down through a first pin shaft, and the first transmission bar (415) and the second transmission bar (416) are respectively rotatably installed with the adjacent second transmission bar (416) and first transmission bar (415) through a second pin shaft; And connecting rods (419) longitudinally penetrating through each of the first sliders (413) and second sliders (414) respectively, and the two connecting rods (419) can pass through the two corresponding second pin shafts; It further includes an engagement driving assembly for driving one of the first sliders (413) to move inward and outward to realize the contraction and expansion movement of the diamond hinge frame.

3. A printing nozzle capable of changing the flow rate in real time according to claim 2, characterized in that: The meshing drive assembly includes a mounting hole formed in the lower part of the pipe body (111), a slide rail (511) provided in the mounting hole, and a slide plate (512) slidably mounted inside the slide rail (511). One end of the slide plate (512) extends into the pipe body (111) and is fixed with an extension rod (517). The end of the extension rod (517) away from the slide plate (512) is fixed with an extension block (519). The extension block (519) passes through a through slot (518) formed in the side wall of one of the mounting rails (412) and is fixed to the corresponding first slider (413). It further includes a drive rack (513) provided at the other end of the slide plate (512). And a mounting frame (514) fixed on the slide rail (511). A drive gear (515) meshing with the drive rack (513) is provided inside the mounting frame (514). It further includes a second motor (516) provided on the side wall of the mounting frame (514) and fixed to the drive gear (515) for driving the rotation of the drive gear (515).

4. A printing nozzle capable of changing the flow rate in real time according to claim 1, wherein: A plurality of groups of transmission components are provided and correspond to a plurality of groups of connecting rods (419) one by one; each group of transmission components includes a V-shaped track. The V-shaped track is arranged between two connecting rods (419) and the pipe body (111), and a transmission track is arranged between the two connecting rods (419) and the expansion part (4281). When the first slider (413) and the second slider (414) move, under the action of the V-shaped track, the two connecting rods (419) adjust the inclination angle of the central opening of the expansion part (4281) through the transmission track. Wherein, the V-shaped track includes a V-shaped frame (426) fixed on the inner wall of the bottom of the pipe body (111). A chute (427) is formed on the upper surface of the V-shaped frame (426), and a transmission frame (423) fixed to the bottom end of each connecting rod (419). One end of each transmission frame (423) away from the connecting rod (419) is provided with a roller (425) that can roll in a limited manner inside the chute (427). It further includes a spring (424) arranged on the outer wall of the connecting rod (419) between each transmission frame (423) and the mounting rail (412). When the first slider (413) and the second slider (414) move outwards, the two connecting rods (419) move adaptively.

5. A printing nozzle capable of changing the flow rate in real time according to claim 4, wherein: The transmission track includes a connecting rail (420) fixed to the bottom of the expansion part (4281). Two transmission blocks are provided inside the connecting rail (420). And a movable block (421) arranged between each transmission block and its corresponding connecting rod (419).

6. A printing nozzle capable of changing the flow rate in real time according to claim 1, wherein: A plurality of openings are formed on the outer circumference of the pipe body (111). A feed pipe (611) is fixed to the upper edge of each opening. and a through hole formed in the middle of the pipe body (111). A rotatable first transmission sleeve (211) is arranged in the through hole. The device further includes a second transmission sleeve (311) fixed to the bottom of the first transmission sleeve (211) and extending into the pipe body (111). A plurality of spiral impeller assemblies are longitudinally arranged at the bottom of the second transmission sleeve (311). Each spiral impeller assembly includes a mounting sleeve (312). Among them, the first mounting sleeve (312) is fixed to the second transmission sleeve (311). and mounting shafts (313) rotatably mounted on both sides of the mounting sleeve (312) respectively. Blades (314) are fixed to the outer ends of each mounting shaft (313). The device further includes a first ratchet drive assembly and a second ratchet drive assembly. Among them, the first ratchet drive assembly is used to drive the whole rotation of a plurality of spiral impeller assemblies, and the second ratchet drive assembly is used to adjust the inclination angle of the blades (314) where a single spiral impeller assembly is located.

7. A printing nozzle capable of changing the flow rate in real time according to claim 6, wherein: The first ratchet drive assembly includes an external tooth ring (215) fixed to the outer wall of the first transmission sleeve (211), and a first motor (213) arranged on the upper surface of the pipe body (111). A first gear body (214) meshing with the external tooth ring (215) is fixed to the output end of the first motor (213).

8. A printing nozzle capable of changing the flow rate in real time according to claim 6, wherein: The second ratchet drive assembly includes a cylinder (216) arranged on the top of the first transmission sleeve (211). The telescopic end of the cylinder (216) passes through a connection hole formed in the top of the first transmission sleeve (211) and is fixed with a connecting shaft. and a plurality of transmission components arranged at the bottom end of the connecting shaft corresponding to a plurality of spiral impeller assemblies. Each transmission component includes a connecting block (217). Transmission racks (218) are symmetrically fixed to the center of the bottom of the connecting block (217), and transmission gears (219) are respectively fixed to the opposite ends of the two mounting shafts (313). Among them, the two transmission gears (219) are respectively meshed with the two transmission racks (218), and the first connecting block (217) is fixed to the connecting shaft. The transmission racks (218) are fixed between adjacent connecting blocks (217).

9. A printing nozzle capable of changing the flow rate in real time according to claim 6, wherein: A rotary seal ring (212) is arranged between the first transmission sleeve (211) and the mounting groove in the middle of the pipe body (111).

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