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CN-121989446-A - Multi-nozzle-replaceable hot-end cooperative type multifunctional 3D printing device

CN121989446ACN 121989446 ACN121989446 ACN 121989446ACN-121989446-A

Abstract

The invention discloses a multi-nozzle-replaceable hot end cooperative type multifunctional 3D printing device, and belongs to the technical field of additive manufacturing. The multifunctional 3D printing device with the replaceable multi-nozzle hot end cooperation type comprises a nozzle, a feeding mechanism, a sliding rail, a front end shell, a butt joint groove, a butt joint convex block, a locking mechanism and a driving mechanism, wherein the butt joint groove is formed in the front end shell, a limiting clamping groove is formed in the butt joint groove, the butt joint convex block is arranged on the rear end framework and matched with the butt joint groove, the butt joint convex block can be clamped into the butt joint groove, the locking mechanism comprises a planetary gear train and a driving disc, a plurality of planetary gears can drive a sun gear which winds the planetary gear train to revolve, the gear ring is rotationally connected with a clamping tenon, the driving mechanism is used for driving the sun gear to rotate, the clamping tenon is clamped in the limiting clamping groove when the sun gear rotates in the forward direction, and the clamping tenon is separated from the limiting clamping groove when the sun gear rotates in the reverse direction. The replaceable multi-nozzle hot end cooperative type multifunctional 3D printing device can ensure that nozzles are always positioned accurately, and printing defects caused by loosening or displacement of the nozzles are reduced.

Inventors

  • WANG GUOPING
  • ZHANG YUANYU
  • ZHOU CHENJIN
  • LI SONGHAO
  • CHENG SHUANG

Assignees

  • 西安交通大学城市学院

Dates

Publication Date
20260508
Application Date
20260402

Claims (10)

  1. 1. The utility model provides a multi-functional 3D printing device of interchangeable many shower nozzles hot junction cooperation formula, includes shower nozzle, feeding mechanism and slide rail, feeding mechanism communicates its characterized in that through material pipe and shower nozzle, still includes: The front end shell is fixedly connected with the spray head, a butt joint groove is formed in the front end shell, and a limit clamping groove is formed in the butt joint groove; The rear end framework is connected to the sliding rail in a sliding way, a butt joint convex block is arranged on the rear end framework, the butt joint convex block is matched with the butt joint groove, and the butt joint convex block can be clamped into the butt joint groove; the locking mechanism comprises a planetary gear train and a driving disc, wherein a gear ring of the planetary gear train is fixedly connected with a rear end framework, the driving disc is connected with a plurality of planetary gears of the planetary gear train, the planetary gears can drive and drive a sun gear coiled around the planetary gear train to revolve, a clamping tenon is rotationally connected to the gear ring, and the clamping tenon is connected with the driving disc; The driving mechanism is connected with the sun gear and is used for driving the sun gear to rotate, when the sun gear rotates positively, the driving disk drives the clamping tenons to deflect positively under the driving of the plurality of planet gears until the clamping tenons are clamped in the limiting clamping grooves, so that the front end shell is limited to move relative to the rear end framework, and when the sun gear rotates reversely, the clamping tenons are separated from the limiting clamping grooves.
  2. 2. The multi-functional 3D printing device of interchangeable multi-nozzle hot end cooperation type according to claim 1, wherein a plurality of limit clamping grooves are arranged in the butt joint groove, the limit clamping grooves are uniformly distributed along the circumferential direction of the transmission shaft, a plurality of clamping tenons are rotationally connected to the gear ring and are circumferentially distributed along the gear ring, each clamping tenon corresponds to one limit clamping groove, each clamping tenon is connected with the driving disc, and when the sun wheel rotates positively, the driving disc drives each clamping tenon to deflect positively, so that each clamping tenon is clamped in the corresponding limit clamping groove.
  3. 3. The multi-functional 3D printing device of the present invention as set forth in claim 2, wherein a plurality of connecting posts are provided on the gear ring along the circumferential direction thereof, one end of each latch is rotatably connected with one connecting post, the other end of each latch is provided with a strip-shaped chute, the driving disk is provided with a plurality of sliding blocks along the circumferential direction thereof, and each sliding block is slidably connected in the strip-shaped chute on one latch.
  4. 4. The multi-nozzle hot end collaborative type multifunctional 3D printing device according to claim 1, wherein the driving mechanism comprises a transmission shaft and two groups of driving assemblies, the transmission shaft is rotationally connected with the rear end framework, the transmission shaft is fixedly connected with the sun wheel, the two groups of driving assemblies are identical in structure and symmetrically distributed on two sides of the transmission shaft, each group of driving assemblies comprises a steering engine and an overrunning clutch, the steering engine of each group of driving assemblies is connected with the transmission shaft through the overrunning clutch, and the steering engines of the two groups of driving assemblies drive the transmission shaft to rotate in opposite directions through the overrunning clutch.
  5. 5. The multi-nozzle hot end cooperative type multifunctional 3D printing device according to claim 4, wherein the overrunning clutch comprises a rotating shaft, a face gear and a ratchet gear, the rotating shaft is connected with a rear end framework through a supporting seat, the ratchet gear is rotationally connected with the rotating shaft, the ratchet gear is fixedly connected with a spur gear, the spur gear is connected with the steering engine, the face gear is fixedly connected with the rotating shaft, unidirectional ratchets are arranged on the end face of the face gear, when the face gear rotates positively, the ratchets on the ratchet gear are in tooth connection with the ratchet gear, when the face gear rotates reversely, the ratchets on the ratchet gear are out of tooth connection with the ratchet gear, and the rotating shaft is in tooth connection with the transmission shaft through a bevel gear A.
  6. 6. The multi-functional 3D printing device of interchangeable multi-nozzle hot junction cooperation formula of claim 5, wherein bevel gear A tooth has elasticity adjustment mechanism, elasticity adjustment mechanism includes spacing screw rod and bevel gear B, spacing screw rod and rear end skeleton threaded connection, and spacing screw rod and the coaxial setting of transmission shaft, spacing screw rod one end is connected with the hand wheel, bevel gear B and spacing screw rod rotate to be connected, bevel gear B and bevel gear A tooth connect, are equipped with buckle gasket and spring on the spacing screw rod, buckle gasket links firmly with spacing screw rod, spring one end and buckle gasket butt, the spring other end and bevel gear B butt, the spring is used for exerting towards the elastic force of transmission shaft one side to bevel gear B, rotates spacing screw rod and can adjust the precompression volume of spring.
  7. 7. The multi-functional 3D printing device of claim 1, wherein the docking bump is provided with a plurality of magnetic attraction buckles, the docking groove is provided with a plurality of magnetic attraction grooves, each magnetic attraction buckle corresponds to one magnetic attraction groove, when the docking bump is clamped into the docking groove, the magnetic attraction buckles are attracted with the magnetic attraction grooves, and the magnetic attraction buckles and the magnetic attraction grooves are used for limiting the relative positions of the docking bump and the docking groove.
  8. 8. The multi-nozzle-replaceable hot-end cooperative type multifunctional 3D printing device according to claim 1, wherein a protective sleeve is arranged outside the transmission shaft, and the transmission shaft is rotatably connected with the rear-end framework through the protective sleeve.
  9. 9. The multi-nozzle-replaceable hot-end cooperative type multifunctional 3D printing device according to claim 1, wherein the rear end framework is connected with a pulley and a belt, the rear end framework is slidably connected to the sliding rail through the pulley, and the belt is used for dragging the rear end framework to slide on the sliding rail.
  10. 10. The multi-functional 3D printing device of claim 1, wherein the latch is detachably connected to the gear ring.

Description

Multi-nozzle-replaceable hot-end cooperative type multifunctional 3D printing device Technical Field The invention relates to the technical field of additive manufacturing, in particular to a multi-functional 3D printing device with a replaceable multi-nozzle hot end in a cooperative mode. Background With the rapid development of the fields of intelligent manufacturing, aerospace, medical equipment, text creation design and the like, the requirements of the market on the precision, the customization degree and the process diversity of product molding are increasingly improved, and the 3D printing technology becomes one of core technologies of product research and development and production in various fields by virtue of the advantages of flexible molding, integrated molding of complex structures and strong personalized customization capability. The composite 3D printing requirements of multiple materials and multiple processes continuously rise, the printing device is required to have the capability of quickly replacing a spray head, high-precision printing stability can be maintained after replacement, external force interference such as material extrusion reaction force and printing platform vibration can be effectively resisted, and the core requirements of high-end manufacturing fields on high-efficiency, precision and multifunction 3D printing are met. The existing 3D printing device with the replaceable spray heads is generally composed of spray heads, a feeding mechanism, a sliding rail and a simple connecting and locking structure, the feeding mechanism conveys consumable materials for the spray heads through a feeding pipe during printing, the consumable materials are melted and extruded through the spray heads to finish printing operation, when the spray heads are required to be replaced to adapt to different printing requirements, old spray heads are detached through disassembling buckles, threads or a single magnetic structure, then the new spray heads are restarted for printing after being abutted and fixed, and therefore replacement of the spray heads and switching of different technologies are achieved. However, in the actual high-precision 3D print job, the connection locking design of the traditional replaceable nozzle 3D printing device has obvious defects, and the use requirement of high-precision printing after quick nozzle replacement is difficult to meet. The shower nozzle of traditional device adopts buckle, screw thread or single magnetism to inhale the mode more and is connected with the rear end skeleton, lack accurate butt joint location and firm linkage locking structure, manual alignment error is big after changing the shower nozzle, and the locking is simple fixed surface only, can't effectively restrict the circumference of shower nozzle, axial displacement, at the printing in-process, external forces such as reaction force that the material extrusion produced, print platform's vibrations easily lead to the shower nozzle not hard up, the position skew, and then it misplaced to trigger between the printing layer, the pattern skew, the consumptive material extrudes inequality and prints the defect, the printing precision is reduced, cause the printing piece to scrap even, seriously influence 3D printing's finished product quality and follow-up use reliability. Disclosure of Invention The invention aims to overcome the problems in the prior art, and provides a multi-nozzle-replaceable hot-end cooperative type multifunctional 3D printing device which can effectively resist various external force interferences such as material extrusion reaction force, printing platform vibration and the like after a nozzle is quickly replaced, and reduce printing defects caused by loosening or displacement of the nozzle, so that printing precision is ensured. The invention provides a multi-nozzle-replaceable hot end cooperative type multifunctional 3D printing device, which comprises a nozzle, a feeding mechanism and a sliding rail, wherein the feeding mechanism is communicated with the nozzle through a feeding pipe, and the device further comprises: The front end shell is fixedly connected with the spray head, a butt joint groove is formed in the front end shell, and a limit clamping groove is formed in the butt joint groove; The rear end framework is connected to the sliding rail in a sliding way, a butt joint convex block is arranged on the rear end framework, the butt joint convex block is matched with the butt joint groove, and the butt joint convex block can be clamped into the butt joint groove; the locking mechanism comprises a planetary gear train and a driving disc, wherein a gear ring of the planetary gear train is fixedly connected with a rear end framework, the driving disc is connected with a plurality of planetary gears of the planetary gear train, the planetary gears can drive and drive a sun gear coiled around the planetary gear train to revolve, a clamping tenon is rotationally c