CN112277316A - 3D printer beats printer head guiding mechanism - Google Patents

3D printer beats printer head guiding mechanism Download PDF

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Publication number
CN112277316A
CN112277316A CN202011105964.4A CN202011105964A CN112277316A CN 112277316 A CN112277316 A CN 112277316A CN 202011105964 A CN202011105964 A CN 202011105964A CN 112277316 A CN112277316 A CN 112277316A
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China
Prior art keywords
shaft
piston
air
ring
sliding seat
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CN202011105964.4A
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CN112277316B (en
Inventor
王明丹
王金伟
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Jinjiang Technology Co ltd
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Jinjiang Technology Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227Driving means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30Auxiliary operations or equipment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B33ADDITIVE MANUFACTURING TECHNOLOGY
    • B33YADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00Apparatus for additive manufacturing; Details thereof or accessories therefor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

The utility model provides a 3D printer beats printer head guiding mechanism, to beat printer head setting on the sliding seat, and the sliding seat presss from both sides and locates between two horizontal guide arms, through the gyro wheel, the direction bottom plate slides and sets up in horizontal guide arm, and the direction bottom plate plays main supporting role, the gyro wheel only sets up for the slip velocity of restriction sliding seat, and set up speed-limiting mechanism between gyro wheel and sliding seat, thereby guarantee to beat printer head and can be real-time, accurate following actuating mechanism action, the problem in drive mechanism clearance has been eliminated, simultaneously, use the cylinder as specific stop gear, moreover, the steam generator is simple in structure, and the steam generator is novel in structure.

Description

3D printer beats printer head guiding mechanism
Technical Field
The invention relates to the technical field of 3D printing, in particular to a printing head guide mechanism of a 3D printer.
Background
The 3D printing technology is one of the rapid prototyping technologies, and is characterized in that a three-dimensional digital model file is established in computer modeling software, then the model is sliced, a printer is used for stacking layer by layer to construct a model entity, and the stacking materials comprise powdered metal or plastic. Due to the advantages of precision, intellectualization and the like, the three-dimensional printing technology is widely applied to the fields of aerospace, biomedical treatment, national defense and military industry, industrial manufacturing and the like. The nozzle of the three-dimensional printer has a crucial influence on the forming quality of three-dimensional printing, and the nozzle needs to reciprocate on the guide rail under the driving of the driving mechanism to realize the three-dimensional printing, so that the nozzle guiding device directly influences the quality of the three-dimensional printing. For example, patent document 1 discloses a nozzle guide device for a 3D printer, which aims to improve stability and smoothness of a nozzle and solve the problem of large friction force generated by the conventional nozzle guided by a single guide rail, and adds a plurality of rolling balls 8 on the periphery of a rolling ball 5, thereby reducing friction between a nozzle mounting block 2 and a nozzle guide rail and improving smoothness and stability of the nozzle guide device, and the important point of the document is how to reduce friction between a roller and the rail to enable smooth sliding without considering that the nozzle executes data information transmitted after slicing processing, the nozzle needs to strictly cooperate with the action of a driving mechanism to accurately realize printing, and uses a cylinder, a piston, a gear rack, a screw pair and the like for transmission, and the transmission mechanism has a fit clearance, and the influence generated by the fit clearance can be amplified due to an excessively smooth guide rail sliding fit relationship, for example, the nozzle slides on the guide rail in advance of the action of the driving mechanism, and when some stimulation is generated outside, the nozzle may separate from the driving mechanism and slide automatically, and the existence of the fit clearance is not allowed under the printing condition of some high-precision printed pieces due to the fact that 3D printing relates to the high-precision and high-quality field; also, as patent document 2 discloses a multifunctional high-precision 3D printer, a printing head of the printer performs a guiding action through a lifting guide rail, end faces of the lifting guide rail, which are located at two sides of a positioning surface, serve as guide surfaces, and guide grooves are formed in the direction along the guide rail, two sides of a lifting seat are respectively provided with a positioning wheel in a rotating manner, the positioning wheels are slidably arranged in the guide grooves, the positioning wheels and the guide grooves are matched to realize bilateral symmetrical transverse positioning, the positioning wheels and the guide grooves are matched to realize stable positioning, so that the lifting seat is precisely lifted, the positioning wheels only consider actions of limiting the printer in the direction perpendicular to a sliding rail to realize precise printing, the positioning wheels are similar to the guide mechanism mentioned in patent document 1, and how to precisely match a driving mechanism to perform actions of the printing head in the direction along the; finally, patent document 3 discloses a hydraulic forklift with a speed limiting function and good stability, wherein a speed reducing mechanism is arranged on a supporting wheel 4, the speed reducing mechanism achieves the purpose of adjusting the maximum rotating speed of the supporting wheel 4 by using a cylinder and a crank mechanism together, so that the speed limiting function of the hydraulic forklift is realized, but the speed reducing mechanism only can play a role after the supporting wheel 4 exceeds a certain speed, and does not play a role of limiting the speed all the time in the real-time action process of the forklift, and the speed limiting mechanism plays a role of ensuring the running safety of the forklift and does not relate to any technical problem of ensuring the running precision.
[ patent document 1] CN 108044928A;
[ patent document 2] CN 106426937B;
[ patent document 3] CN 110668360A.
In summary, in the 3D printer of the prior art, how to synchronize the printing head with the driving mechanism accurately in real time and how to realize that the printing head tracks the data information transmitted after the model slice processing in real time is not considered, and it is not considered that the printing head cannot track the model slice data information in real time due to the fit clearance existing in the transmission mechanism in the process of transmitting the driving mechanism to the printing head terminal, which affects the printing quality. According to the 3D printer printing head guide mechanism provided by the application, the speed limiting mechanism is arranged on the guide wheel of the printing head sliding mechanism, the printing head can track the power mechanism in real time without deviation through the rolling of the limiting roller wheel, and therefore a 3D printing product with high precision can be obtained.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a technical scheme, and the printing head guide mechanism of the 3D printer comprises: the printing head is arranged on the horizontal guide rod in a sliding mode through the sliding seat, the sliding seat is arranged on the horizontal guide rod in a sliding mode through the driving mechanism, the horizontal guide rod comprises a rear horizontal guide rod and a front horizontal guide rod which are arranged in parallel, the sliding seat is arranged between the front horizontal guide rod and the rear horizontal guide rod in a sliding mode through 4 rollers, a speed limiting mechanism is arranged between each roller and the sliding seat, the two rollers are connected through a crank rod shaft, the two crank rod shafts are arranged at the end portion of the sliding seat in a parallel rotating mode and comprise a first tail end shaft, a second eccentric shaft, a third main body shaft, a fourth eccentric shaft and a fifth tail end shaft, the first tail end shaft, the third main body shaft and the fifth tail end shaft are arranged in a concentric mode, the second eccentric shaft, the third main body shaft and the fourth eccentric shaft are arranged in a parallel mode, the axis of the second eccentric shaft and the axis of the fourth eccentric shaft are in, the first end shaft is connected with the second eccentric shaft through a first connecting rod, the second eccentric shaft is connected with the third main body shaft through a second connecting rod, the third main body shaft is connected with the fourth eccentric shaft through a third connecting rod, the fourth eccentric shaft is connected with the fifth end shaft through a fourth connecting rod, and the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are parallel to each other and are perpendicular to the third main body shaft.
Preferably, the speed limiting mechanism comprises a left speed limiting mechanism and a right speed limiting mechanism, the left speed limiting mechanism comprises a first sliding sleeve and a first piston, the first sliding sleeve is slidably sleeved on the second eccentric shaft, one end of the first piston is fixedly connected with the first sliding sleeve, the other end of the first piston is hinged on the sliding seat, the right speed limiting mechanism comprises a second sliding sleeve and a second piston, the second sliding sleeve is slidably sleeved on the fourth eccentric shaft, one end of the second piston is fixedly connected with the second sliding sleeve, and the other end of the second piston is hinged on the sliding seat; the first piston and the second piston respectively comprise a piston rod, a piston and a cylinder barrel, the cylinder barrel positioned on the upper portion of the piston forms an upper cavity, the cylinder barrel positioned on the lower portion of the piston forms a lower cavity, an exhaust port a is formed in the upper end of the upper cavity of the first piston, an exhaust port b is arranged on the lower side of the lower cavity of the first piston, an exhaust port c is formed in the upper end of the upper cavity of the second piston, an exhaust port d is arranged on the lower side of the lower cavity of the second piston, the exhaust ports a and c are connected through a first vent pipe, and the exhaust ports b and d are connected through a second vent pipe.
Preferably, the first vent pipe and the second vent pipe are both provided with throttle valves.
Preferably, the sliding seat comprises a shell and a guide bottom plate, the shell is arranged on the guide bottom plate, and two ends of the guide bottom plate are arranged between the front horizontal guide rod and the rear horizontal guide rod in a sliding mode.
Preferably, the front horizontal guide rod and the rear horizontal guide rod respectively comprise a C-shaped guide rail and an L-shaped guide rail, the roller is arranged in the C-shaped guide rail in a fitting manner, and the lower end face of the C-shaped guide rail is a rough surface; the L-shaped guide rail is fixedly arranged at the lower end of the C-shaped guide rail, and the guide bottom plate is attached to the L-shaped guide rail.
Preferably, a certain gap is formed between the side part of the C-shaped guide rail and the side part of the roller, elastic membrane structures are arranged on two sides of the roller and comprise an upper semicircular elastic membrane and a lower semicircular elastic membrane, the elastic membrane structures are made of elastic membranes capable of stretching and expanding, and the elastic membranes are controlled by the first piston or the second piston to contract or expand.
Preferably, the upper ends of two sides of the roller are respectively provided with an upper semicircular elastic membrane, the lower ends of two sides of the roller are respectively provided with a lower semicircular elastic membrane, the upper end of the inner side of the roller is provided with a first air duct, the lower end of the inner side of the roller is provided with a second air duct, the first air duct is respectively communicated with the upper semicircular elastic membrane on the left side and the right side of the roller, the second air duct is respectively communicated with the lower semicircular elastic membrane on the left side and the right side of the roller, two ends of the crank shaft are respectively provided with a third air duct communicated with the second air duct and a fourth air duct communicated with the first air duct, an air outlet of the third air duct positioned at the left end of the crank shaft is positioned on the; an air outlet of the air channel IV positioned at the left end of the crank shaft is positioned at the left end of the third main body shaft, a second ventilation ring is sleeved at the air outlet, and an inflation inlet of the second ventilation ring is connected to an exhaust outlet b; an air outlet of the air duct III, which is positioned at the right end of the crank shaft, is positioned at the right end of the third main body shaft, a third air ring is sleeved at the air outlet, and an inflation inlet of the third air ring is connected to the exhaust port c; and the air outlet of the air duct IV positioned at the right end of the crank shaft is positioned on the fifth tail end shaft, a vent ring IV is sleeved at the air outlet, and the inflation inlet of the vent ring IV is connected to the exhaust port d.
Preferably, the first ventilation ring, the second ventilation ring, the third ventilation ring and the fourth ventilation ring have the same structure and respectively comprise a sealing ring body and an inflation inlet, and the sealing ring body can be sleeved at the outer end of the shaft and can be in sliding sealing relative to the shaft.
Preferably, two ends of the shaft, which are positioned on the ventilation ring, are provided with limit blocks;
preferably, the inflation port and each exhaust port are connected by an air tube.
The invention has the beneficial effects that:
1) the speed-limiting mechanism is arranged on the guide wheel of the printing head guide mechanism, the speed-limiting mechanism realizes the passive speed-limiting function of the roller wheel by combining the piston and the curved rod, so that the problem of fit clearance in a transmission mechanism is solved, the printing head can accurately carry out three-dimensional printing along with three-dimensional slice data, meanwhile, the printing head can be driven to slide by using an inaccurate driving mechanism such as a hydraulic oil cylinder and the like, and the accurate three-dimensional printing operation is jointly completed by combining the speed-limiting mechanism, so that the driving mechanism only provides a driving force independently, and the guide mechanism with the speed-limiting mechanism is used for completing accurate positioning, thus compared with the driving by using a precise ball screw, the production and maintenance cost is saved;
2) the printing head is arranged on the guide seat, the guide seat is arranged between the two guide rods in a sliding mode and comprises 4 rollers, a speed limiting mechanism is arranged at each roller, the speed limiting mechanisms between the two rollers are connected with each other, and the rotation phase angle difference of the two speed limiting mechanisms is 180 degrees, so that when a piston rod of one speed limiting mechanism extends out, a piston rod of the other speed limiting mechanism is in a retraction state, upper cavities of the two pistons are connected with each other through a first vent pipe, lower cavities of the two pistons are connected with each other through a second vent pipe, throttle valves with adjustable opening degrees are arranged on the first vent pipe and the second vent pipe, the damping force of the pistons can be controlled through adjusting the throttle valves, and the adjustability of the speed limiting mechanisms is further improved;
3) furthermore, elastic membrane structures capable of controlling the expansion or retraction of the rollers are arranged on two sides of each roller, each elastic membrane structure on one side of each roller comprises an upper semicircular elastic membrane and a lower semicircular elastic membrane which are independent respectively, the elastic membranes are selected to have elastic membrane structures, and the friction force between the rollers and the guide rail can be further increased by controlling the collision or retraction of the elastic membranes, so that the speed of the rollers can be better limited, meanwhile, the anti-seismic capacity of the equipment can be further improved by the elastic membrane structures on two side edges, and fatal damage to a printing head can not be caused when the equipment is subjected to unexpected impact force;
4) furthermore, air ducts are arranged in the idler wheel and the crank shaft, an air duct ring structure comprising a sealing ring body is sleeved outside an outlet of the air duct, and air in the piston can be output and supplied to the elastic membrane structure through the air duct arranged inside and the air duct capable of rotating around a shaft, so that the expansion or retraction of the elastic membrane is adaptive to the piston without additionally arranging any driving structure, and meanwhile, the arrangement of the air supply structure is not influenced by the rotation of a crankshaft, and a brand new air supply mode is innovatively provided;
5) furthermore, the upper cavity of the first piston on the left side is connected with the second vent ring, so that the upper cavity of the first piston is simultaneously connected with the upper semicircular elastic membranes on the left and right sides of the left roller; the upper cavity of the second piston on the right side is connected with the vent ring III, so that the upper cavity of the second piston is simultaneously connected with the lower semicircular elastic membranes on the left and right sides of the right roller, and the lower cavity of the second piston on the right side is connected with the vent ring IV, so that the lower cavity of the second piston is simultaneously connected with the upper semicircular elastic membranes on the left and right sides of the right roller;
6) furthermore, in order to ensure the sliding stability of the sliding seat, the horizontal guide rod structure comprises a C-shaped guide rail for guiding the roller and an L-shaped guide rail for guiding the guide bottom plate, the L-shaped guide rail is mainly used for bearing force, the C-shaped guide rail is mainly used for limiting the moving speed of the roller, and the stability and operability of the equipment are further improved through the arrangement of the guide rod structure.
Drawings
FIG. 1 is a schematic view of a 3D printer according to the present invention;
FIG. 2 is a top view of the horizontal guide bar of the present invention;
FIG. 3 is a view A-A of FIG. 2;
FIG. 4 is a schematic view of a two-piston connection of the present invention;
FIG. 5 is an enlarged view of B of FIG. 3;
FIG. 6 is an enlarged view of C of FIG. 3;
FIG. 7 is a schematic view of a roller structure;
fig. 8 is a view from D-D of fig. 7.
Description of the reference symbols
1. A print head; 2. a camera; 3. a transverse guide seat; 4. a vertical guide post; 5. a horizontal guide rod; 6. a printing platform; 7. three-dimensional printing; 8. a rear horizontal guide rod; 9. a front horizontal guide rod; 10. a sliding seat; 11. a roller; 12. a speed limiting mechanism; 13. a guide base plate; 14. a housing; 15. a crank shaft; 16. a first end shaft; 17. a second eccentric shaft; 18. a third main body shaft; 19. a fourth eccentric shaft; 20. a fifth end shaft; 21. a first link; 22. a second link; 23. a third link; 24. a fourth link; 25. a first sliding sleeve; 26. a second sliding sleeve; 27. a first piston; 28. a second piston; 29. a piston rod; 30. a cylinder barrel; 31. a piston; 32. an upper semicircular elastic membrane; 33. a lower semicircular elastic membrane; 34. a first air duct; 35. a second air duct; 36. a third air duct; 37. a fourth air duct; 38. a first ventilation ring; 39. a second ventilation ring; 40. a third ventilation ring; 41. a fourth ventilation ring; 42. a sealing ring body; 43. an inflation inlet; 44. an upper cavity; 45. a lower cavity; 46. a first vent pipe; 47. a second vent pipe; 48. a throttle valve; 49. a C-shaped guide rail; 50. an L-shaped guide rail.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
As shown in fig. 1, the 3D printer of the present invention includes: print head 1, camera 2, horizontal guide holder 3, vertical guide pillar 4, horizontal guide arm 5 and print platform 6, camera 2 is fixed to be set up on printing head 1 for gather the image data of three-dimensional printing 7, after judging that three-dimensional printing 7 prints and accomplishes, stop to print head 1's printing. Print head 1 and slide through sliding seat 10 and set up on horizontal guide 5, can follow horizontal guide 5 horizontal slip, 5 both ends of horizontal guide respectively slide and set up a vertical guide pillar 4, horizontal guide 5 can be along vertical guide pillar 4 and do the oscilaltion motion, the lower extreme of two vertical guide pillars 4 all respectively sets up a horizontal guide 3, and can be along horizontal guide 3 fore-and-aft motion, print platform 6 is located between two horizontal guide 3, when carrying out three-dimensional printing, the nozzle blowout powdered metal that prints head 1 can adhere materials such as plastics, form three-dimensional printing 7 on print platform 6. Here, the specific structure of beating printer head 1 can be current any three-dimensional printer head structure, and drive horizontal guide arm 5 slides from top to bottom, vertical guide pillar 4 slides from front to back, beat printer head 1 left and right horizontal slip's actuating mechanism can be current any motor, lead screw, hydro-cylinder, telescopic cylinder structure, can provide sliding power can, still include like gyro wheel, slider guide rail mechanism, can for it lead can, it is not the focus of this application, and this kind of structure is more common structure in this field, consequently, no longer gives details here.
As shown in fig. 2-4, the print head 1 is fixed on the sliding seat 10 by digging a hole or by additionally providing an installation seat and then fixing the installation seat on the sliding seat 10, one end of the driving mechanism such as an oil cylinder and a telescopic cylinder can be connected to the sliding seat 10, the other end of the driving mechanism is fixed on the horizontal guide rod 5 to realize the sliding of the print head 1, the driving mechanism such as a screw rod can penetrate through the sliding seat 10 or a screw seat matched screw rod is provided on the sliding seat 10 to realize the sliding of the print head 1, and the driving mechanism is not the key point of the present application, and therefore, the description is omitted here. The horizontal guide rod 5 comprises a rear horizontal guide rod 8 and a front horizontal guide rod 9 which are arranged in parallel, a sliding seat 10 is arranged between the front horizontal guide rod 9 and the rear horizontal guide rod 8 in a sliding mode through 4 idler wheels 11, speed limiting mechanisms 12 are arranged between the idler wheels 11 and the sliding seat 10, the two idler wheels 11 are connected through a crank shaft 15, the two crank shaft 15 are arranged, and the two crank shaft are arranged at the end portion of the sliding seat 10 in a parallel rotating mode. The crank shaft 15 comprises a first end shaft 16, a second eccentric shaft 17, a third main body shaft 18, a fourth eccentric shaft 19 and a fifth end shaft 20, the first end shaft 16, the third main body shaft 18 and the fifth end shaft 20 are concentrically arranged, the second eccentric shaft 17, the third main body shaft 18 and the fourth eccentric shaft 19 are arranged in parallel, the axis of the second eccentric shaft 17 and the axis of the fourth eccentric shaft 19 are in central symmetry along the axis of the third main body shaft 18, the first end shaft 16 and the second eccentric shaft 17 are connected through a first link 21, the second eccentric shaft 17 and the third main body shaft 18 are connected through a second link 22, the third main body shaft 18 and the fourth eccentric shaft 19 are connected through a third link 23, the fourth eccentric shaft 19 and the fifth end shaft 20 are connected through a fourth link 24, and the first link 21, the second link 22, the third link 23 and the fourth link 24 are parallel, and are both perpendicular to the third body axis 18. The left speed limiting mechanism 12 comprises a first sliding sleeve 25 and a first piston 27, the first sliding sleeve 25 is slidably sleeved on the second eccentric shaft 17, one end of the first piston 27 is fixedly connected with the first sliding sleeve 25, and the other end of the first piston 27 is hinged on the sliding seat 10. The right speed limiting mechanism 12 comprises a second sliding sleeve 26 and a second piston 28, the second sliding sleeve 26 is slidably sleeved on the fourth eccentric shaft 19, one end of the second piston 28 is fixedly connected with the second sliding sleeve 26, and the other end of the second piston 28 is hinged on the sliding seat 10. The first piston 27 and the second piston 28 each include a piston rod 29, a piston 31 and a cylinder 30, the cylinder located at the upper portion of the piston 31 forms an upper chamber 44, the cylinder located at the lower portion of the piston 31 forms a lower chamber 45, an exhaust port a is formed at the upper end of the upper chamber 44 of the first piston 27, an exhaust port b is provided at the lower side of the lower chamber 45 of the first piston 27, an exhaust port c is formed at the upper end of the upper chamber 44 of the second piston 28, an exhaust port d is provided at the lower side of the lower chamber 45 of the second piston 28, the exhaust ports a and c are connected by a first vent pipe 46, and the exhaust ports b and d are connected by a second vent pipe 47. Preferably, in order to adjust the amount of gas flow and thus change the amount of damping of the piston, a throttle valve 48 is provided on each of the first and second conduits 46, 47. Through the arrangement of the speed limiting mechanism, when the sliding seat 10 slides, the roller 11 can always be decelerated through the first piston 27 and the second piston 28, and the sliding seat 10 can be accurately controlled by the driving mechanism to slide.
Preferably, the sliding seat 10 includes a housing 14 and a guide bottom plate 13, the housing 14 is disposed on the guide bottom plate 13, and two ends of the guide bottom plate 13 are slidably disposed between the front horizontal guide rod 9 and the rear horizontal guide rod 8.
Preferably, preceding horizontal guide 9 and back horizontal guide 8 all include C type guide 49 and L type guide 50, and the laminating of gyro wheel 11 sets up inside C type guide 49, and the lower terminal surface of C type guide 49 is rough surface to sliding seat 10 can drive gyro wheel 11 and rotate when sliding in C type guide 49, and then can drive first piston 27 and the action of second piston 28, thereby plays better speed reduction effect. The L-shaped guide rail 50 is fixedly arranged at the lower end of the C-shaped guide rail 49, and the guide bottom plate 13 is attached to and arranged in the L-shaped guide rail 50.
Further, as shown in fig. 5 to 8, in order to further increase the deceleration effect, a certain gap is formed between the side portion of the C-shaped guide rail and the side portion of the roller 11, and an elastic film structure is disposed on both sides of the roller 11, and the elastic film structure includes an upper semicircular elastic film 32 and a lower semicircular elastic film 33, and the elastic film structure is made of an elastic film capable of expanding and contracting, and is controlled by the first piston 27 or the second piston 28 to contract or expand.
Furthermore, the upper ends of the two sides of the roller 11 are respectively provided with an upper semicircular elastic membrane 32, the lower ends of the two sides are respectively provided with a lower semicircular elastic membrane 33, the upper end of the inner side of the roller 11 is provided with a first air duct 34, the lower end of the inner side of the roller 11 is provided with a second air duct 35, the first air duct 34 is respectively communicated with the upper semicircular elastic membranes 32 on the left side and the right side of the roller 11, the second air duct 35 is respectively communicated with the lower semicircular elastic membranes 33 on the left side and the right side of the roller 11, the two ends of the crank shaft 15 are respectively provided with a third air duct 36 communicated with the second air duct 35 and a fourth air duct 37 communicated with the first air duct 34, the air outlet of the third air duct 36 positioned at the left end of the crank shaft 15 is positioned on the first tail end shaft 16; an air outlet of an air channel IV 37 positioned at the left end of the crank shaft 15 is positioned at the left end of the third main body shaft 18, a second ventilation ring 39 is sleeved at the air outlet, and an air charging port 43 of the second ventilation ring 39 is connected to an air discharging port a; an air outlet of the air channel III 36 positioned at the right end of the crank shaft 15 is positioned at the right end of the third main body shaft 18, a third ventilation ring 40 is sleeved at the air outlet, and an air charging port 43 of the third ventilation ring 40 is connected to an air discharging port c; an air outlet of the air channel four 37 at the right end of the crank shaft 15 is located on the fifth end shaft 20, and an air ring four 41 is sleeved at the air outlet, and an air charging port 43 of the air ring four 41 is connected to the air discharging port d.
Further, the first vent ring 38, the second vent ring 39, the third vent ring 40 and the fourth vent ring 41 have the same structure and each include a sealing ring body 42 and an inflation opening 43, and the sealing ring body 42 can be sleeved on the outer end of the shaft and can perform sliding sealing relative to the shaft. The inflation port 43 and each exhaust port are connected by an air pipe.
Furthermore, in order to ensure that each ventilation ring can not slide out of the air outlet, two ends of the ventilation ring on the shaft are provided with limiting blocks so as to further ensure the operation safety of the equipment.
The working process of the 3D printer comprises the following steps: reading a three-dimensional model of a product to be printed, driving a driving mechanism to act to drive a printing head to slide left and right along a horizontal guide rail 5, driving a roller 11 to roll along a C-shaped guide rail by the action of a sliding seat 10, thereby driving the second eccentric shaft and the fourth eccentric shaft to rotate along the axis of the third body shaft 18, driving the first piston 27 and the second piston 28 to perform asynchronous extending and retracting actions, thereby driving the piston to slide up and down and pushing the gas in the cylinder barrel to pass in and out through the exhaust port, thereby achieving the purposes of slowing down the sliding speed of the printing head and ensuring that the printing head is not influenced by the clearance of the transmission mechanism to solve the problem that the printing head can not print data synchronously, and simultaneously, further, the left side and the right side of the roller are provided with elastic membrane structures which act synchronously with the piston cylinder, and the purpose of further reducing the sliding speed of the printing head is enhanced by the elastic membrane abutting against the side wall of the C-shaped guide rail. Meanwhile, the two pistons are connected through a vent pipe, a throttle valve is arranged on the vent pipe, and the damping of the cylinder can be changed by controlling the opening of the throttle valve. After the printing head runs in place, the gap of the transmission mechanism between the printing head and the driving mechanism is eliminated, then the printing head spray head starts to act to spray metal powder or plastic fluid, so that a desired three-dimensional printing piece is printed, the camera monitors the printing platform in real time, and the three-dimensional printing piece on the printing platform stops working automatically after printing is finished.
Known from the above description, the 3D printer of this application beats printer head guiding mechanism, it sets up on the sliding seat to beat printer head, and the sliding seat clamp is located between two horizontal guide arms, through the gyro wheel, the direction bottom plate slides and sets up in horizontal guide arm, and the direction bottom plate plays main supporting role, the gyro wheel only sets up for the slip velocity of restriction sliding seat, and set up speed-limiting mechanism between gyro wheel and sliding seat, thereby guarantee to beat printer head and can real-time, accurate following actuating mechanism action, the problem in drive mechanism clearance has been eliminated, simultaneously, use the cylinder as specific stop gear, moreover, the steam generator is simple in structure, and novel structure.

Claims (10)

1. A3D printer beats printer head guiding mechanism, it includes: horizontal guide arm (5) and sliding seat (10), beat printer head (1) and slide through sliding seat (10) and set up on horizontal guide arm (5), sliding seat (10) slide through actuating mechanism and set up on horizontal guide arm (5), its characterized in that: the horizontal guide rod (5) comprises a rear horizontal guide rod (8) and a front horizontal guide rod (9) which are arranged in parallel, a sliding seat (10) is arranged between the front horizontal guide rod (9) and the rear horizontal guide rod (8) in a sliding mode through 4 rollers (11), speed limiting mechanisms (12) are arranged between the rollers (11) and the sliding seat (10), the two rollers (11) are connected through a crank rod shaft (15), two crank rod shafts (15) are arranged and are arranged at the end of the sliding seat (10) in a parallel rotating mode, the crank rod shaft (15) comprises a first tail end shaft (16), a second eccentric shaft (17), a third main body shaft (18), a fourth eccentric shaft (19) and a fifth tail end shaft (20), the first tail end shaft (16), the third main body shaft (18) and the fifth tail end shaft (20) are arranged concentrically, the second eccentric shaft (17), the third main body shaft (18) and the fourth eccentric shaft (19) are arranged in parallel, the axis of the second eccentric shaft (17) and the axis of the fourth eccentric shaft (19) are centrosymmetric along the axis of the third main body shaft (18), the first end shaft (16) and the second eccentric shaft (17) are connected through a first link (21), the second eccentric shaft (17) and the third main body shaft (18) are connected through a second link (22), the third main body shaft (18) and the fourth eccentric shaft (19) are connected through a third link (23), the fourth eccentric shaft (19) and the fifth end shaft (20) are connected through a fourth link (24), and the first link (21), the second link (22), the third link (23) and the fourth link (24) are parallel to each other and are perpendicular to the third main body shaft (18).
2. The 3D printer printhead guide mechanism of claim 1, wherein: the speed limiting mechanism (12) comprises a left speed limiting mechanism and a right speed limiting mechanism, the left speed limiting mechanism comprises a first sliding sleeve (25) and a first piston (27), the first sliding sleeve (25) is slidably sleeved on the second eccentric shaft (17), one end of the first piston (27) is fixedly connected with the first sliding sleeve (25), the other end of the first piston (27) is hinged on the sliding seat (10), the right speed limiting mechanism comprises a second sliding sleeve (26) and a second piston (28), the second sliding sleeve (26) is slidably sleeved on the fourth eccentric shaft (19), one end of the second piston (28) is fixedly connected with the second sliding sleeve (26), and the other end of the second piston (28) is hinged on the sliding seat (10); the first piston (27) and the second piston (28) respectively comprise a piston rod (29), a piston (31) and a cylinder (30), the cylinder located on the upper portion of the piston (31) forms an upper cavity (44), the cylinder located on the lower portion of the piston (31) forms a lower cavity (45), an exhaust port a is formed in the upper end of the upper cavity (44) of the first piston (27), an exhaust port b is arranged on the lower side of the lower cavity (45) of the first piston (27), an exhaust port c is formed in the upper end of the upper cavity (44) of the second piston (28), an exhaust port d is arranged on the lower side of the lower cavity (45) of the second piston (28), the exhaust ports a and c are connected through a first vent pipe (46), and the exhaust ports b and d are connected through a second vent pipe (47).
3. The 3D printer printhead guide mechanism of claim 2, wherein: and throttle valves (48) are arranged on the first vent pipe (46) and the second vent pipe (47).
4. The 3D printer printhead guide mechanism of claim 2, wherein: the sliding seat (10) comprises a shell (14) and a guide bottom plate (13), the shell (14) is arranged on the guide bottom plate (13), and two ends of the guide bottom plate (13) are arranged between the front horizontal guide rod (9) and the rear horizontal guide rod (8) in a sliding mode.
5. The 3D printer printhead guide mechanism of claim 4, wherein: the front horizontal guide rod (9) and the rear horizontal guide rod (8) respectively comprise a C-shaped guide rail (49) and an L-shaped guide rail (50), the roller (11) is attached to the inside of the C-shaped guide rail (49), and the lower end surface of the C-shaped guide rail (49) is a rough surface; the L-shaped guide rail (50) is fixedly arranged at the lower end of the C-shaped guide rail (49), and the guide bottom plate (13) is attached to and arranged in the L-shaped guide rail (50).
6. The 3D printer printhead guide mechanism of claim 5, wherein: a certain gap is reserved between the side portion of the C-shaped guide rail and the side portion of the roller (11), elastic membrane structures are arranged on two sides of the roller (11) and comprise an upper semicircular elastic membrane (32) and a lower semicircular elastic membrane (33), the elastic membrane structures are made of elastic membranes capable of stretching and expanding, and the elastic membranes are controlled by a first piston (27) or a second piston (28) to contract or expand.
7. The 3D printer printhead guide mechanism of claim 6, wherein: the upper ends of two sides of the roller (11) are respectively provided with an upper semicircular elastic membrane (32), the lower ends of two sides are respectively provided with a lower semicircular elastic membrane (33), the upper end of the inner side of the roller (11) is provided with a first air duct (34), the lower end of the inner side of the roller (11) is provided with a second air duct (35), the first air duct (34) is respectively communicated with the upper semicircular elastic membranes (32) at the left side and the right side of the roller (11), the second air duct (35) is respectively communicated with the lower semicircular elastic membranes (33) at the left side and the right side of the roller (11), two ends of the crank shaft (15) are respectively provided with a third air duct (36) communicated with the second air duct (35) and a fourth air duct (37) communicated with the first air duct (34), and an air outlet of the third air duct (36, a first vent ring (38) is sleeved at the air outlet, and an inflation inlet (43) of the first vent ring (38) is connected to the air outlet b; an air outlet of an air channel IV (37) positioned at the left end of the crank shaft (15) is positioned at the left end of the third main body shaft (18), a second air ring (39) is sleeved at the air outlet, and an air charging port (43) of the second air ring (39) is connected to an air discharging port a; an air outlet of an air channel III (36) positioned at the right end of the crank shaft (15) is positioned at the right end of the third main body shaft (18), a third air ring (40) is sleeved at the air outlet, and an air charging opening (43) of the third air ring (40) is connected to an air discharging opening c; an air outlet of an air channel four (37) positioned at the right end of the crank shaft (15) is positioned on the fifth tail end shaft (20), a vent ring four (41) is sleeved at the air outlet, and an air charging opening (43) of the vent ring four (41) is connected to an air discharging opening d.
8. The 3D printer printhead guide mechanism of claim 7, wherein: the structure of the first ventilation ring (38), the second ventilation ring (39), the third ventilation ring (40) and the fourth ventilation ring (41) is the same, the first ventilation ring (38), the second ventilation ring (39), the third ventilation ring (40) and the fourth ventilation ring (41) all comprise sealing ring bodies (42) and inflation ports (43), the outer ends of the shafts can be sleeved with the sealing ring bodies (42), and sliding sealing can be carried out relative to the shafts.
9. The 3D printer printhead guide mechanism of claim 8, wherein: the two ends of the shaft, which are positioned on the ventilation ring, are provided with limit blocks.
10. The 3D printer printhead guide mechanism of claim 7, wherein: the inflation inlet (43) and each exhaust port are connected through an air pipe.
CN202011105964.4A 2020-10-15 2020-10-15 3D printer beats printer head guiding mechanism Active CN112277316B (en)

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Publication number Priority date Publication date Assignee Title
CN113397194A (en) * 2021-06-30 2021-09-17 界首市好味来食品有限公司 Remote DIY dessert manufacturing platform based on 5G technology

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CN206394025U (en) * 2017-03-14 2017-08-11 东莞市君跃展示设计有限公司 Multi-shaft interlocked double end 3D printer
CN210453797U (en) * 2019-08-19 2020-05-05 广东奥仕智能科技股份有限公司 Inertia offset device of 3D printer
CN210759275U (en) * 2019-08-19 2020-06-16 广东奥仕智能科技股份有限公司 Inertia force adjustable 3D printer inertia offsetting device

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CN103831975A (en) * 2014-03-19 2014-06-04 中国科学技术大学 3D (three-dimensional) printing system structure
CN105856576A (en) * 2016-06-16 2016-08-17 泉州鑫彩贸易有限公司 3D printer
CN206394025U (en) * 2017-03-14 2017-08-11 东莞市君跃展示设计有限公司 Multi-shaft interlocked double end 3D printer
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CN113397194A (en) * 2021-06-30 2021-09-17 界首市好味来食品有限公司 Remote DIY dessert manufacturing platform based on 5G technology

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