WO2020125232A1 - Mécanisme d'élévation et dispositif d'impression 3d photodurcissable - Google Patents

Mécanisme d'élévation et dispositif d'impression 3d photodurcissable Download PDF

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Publication number
WO2020125232A1
WO2020125232A1 PCT/CN2019/114927 CN2019114927W WO2020125232A1 WO 2020125232 A1 WO2020125232 A1 WO 2020125232A1 CN 2019114927 W CN2019114927 W CN 2019114927W WO 2020125232 A1 WO2020125232 A1 WO 2020125232A1
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WO
WIPO (PCT)
Prior art keywords
chute
roller
slider
sliding
groove
Prior art date
Application number
PCT/CN2019/114927
Other languages
English (en)
Chinese (zh)
Inventor
欧阳欣
周承立
张卫嘉
欧阳露
Original Assignee
深圳市纵维立方科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市纵维立方科技有限公司 filed Critical 深圳市纵维立方科技有限公司
Publication of WO2020125232A1 publication Critical patent/WO2020125232A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive 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
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/227—Driving means
    • B29C64/232—Driving means for motion along the axis orthogonal to the plane of a layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive 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
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/245—Platforms or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE 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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor

Definitions

  • the present invention relates to the technical field of 3D printing, in particular to a photocuring 3D printing device, and more particularly to a lifting mechanism of a photocuring 3D printing device.
  • Photocuring 3D printing technology mainly uses photosensitive resin as a material, and the photosensitive resin is cured layer by layer by ultraviolet light or other light sources to form a complete product. It has the advantages of high molding accuracy and good surface effect after molding, and can be used in many fields such as aerospace, construction, medical treatment, and mold manufacturing.
  • the specific process of photocuring 3D printing is as follows: the thickness of the preformed first resin layer is left between the surface of the forming platform and the release film at the bottom of the resin tank, and the resin in the resin tank enters the remaining space; ultraviolet light Irradiate the liquid crystal screen, the liquid crystal screen selectively transmits ultraviolet light according to the pre-printed pattern, and the transmitted ultraviolet light passes through the release film at the bottom of the resin tank, irradiates the resin that is in the remaining space and is attached to the molding platform, and the resin is cured and molded On the forming platform. Then, the molding platform is driven up by a certain distance under the drive of the Z axis, so that the resin in the resin tank quickly fills the position of the cured resin.
  • the Z axis drives the molding platform to fall a certain distance, so that the thickness of the next pre-formed resin layer remains between the surface of the molding platform and the release film at the bottom of the resin tank; then, the transmitted ultraviolet light cures the resin to form On the upper layer of cured resin, form the next layer of preformed model.
  • the Z axis needs to drive the forming platform to move up and down countless times.
  • CN207669805U discloses a lifting mechanism of a light-curing 3D printer, which includes a base, a support vertical plate, and a screw rod; a guide rail is provided on the support vertical plate, and a motion cantilever is provided on the screw rod, and the motion cantilever and the guide rail are slidingly moved
  • a stepping motor is set in the base, and the stepping motor drives the screw to rotate, which in turn drives the cantilever to slide on the guide rail.
  • CN105437542A, CN204710776U, CN207617120U, CN104527070A disclose a lifting mechanism with a similar structure to CN207669805U, all by providing guide rails on the support plate, through The sliding movement of the printing platform through the cooperation of the slider and the guide rail can raise and lower the printing platform.
  • the lifting mechanism disclosed in the above patent or patent application is also a conventional lifting mechanism currently used in photocurable 3D printing equipment.
  • the gap between the guide rails and the sliders is not adjustable.
  • the guide rail is fixed to the support plate by bolts or other fixing methods, and the support plate is fixed to the base.
  • the guide rail has extremely high installation accuracy on the support plate and that the fixed installation of the support plate on the base has high precision. Slight deviations in the installation of the guide rail and the support plate and the support plate and the base will result in the slider not sliding smoothly and precisely on the guide rail, and also causing the printing platform to sway or even jam during the lifting process.
  • the present invention provides a lifting mechanism of a photo-curing 3D printing device and a photo-curing 3D printing device using the lifting mechanism.
  • a lifting mechanism for lifting a printing platform including: a first plate, a guide rail, a slider, a driving part and a connecting part;
  • the guide rail includes a chute; there are at least two chute, the chute is provided on the first surface of the first plate, the at least two chute are parallel to each other and extend in a first direction , The first direction is parallel to the first surface of the first plate, and the sliding groove is integrally formed with the first plate;
  • Each of the sliding grooves is provided with at least one slider, and the slider is slidingly matched with the corresponding sliding groove;
  • the connecting portion connects the slider, the driving portion, and the printing platform so that the connecting portion drives the slider and the printing platform along the Move in the first direction.
  • the at least one slider on each chute is located at the same position of the corresponding chute during sliding, so that at least two sliders can keep the printing surface of the printing platform vertical To the first direction.
  • each of the sliders includes a slider body and at least one sliding member, the position of the sliding member is adjustable on the slider body, the at least one sliding member corresponds to the slider The chute is in contact.
  • the sliding member is at least one of a roller or a gear.
  • each of the sliders includes at least two of the sliding members.
  • the chute includes a first chute wall and a second chute wall, the first chute wall and the second chute wall are provided with a semi-cylindrical protrusion or with a gear At least one of the meshing teeth.
  • the slider includes a first roller, a second roller, and a third roller;
  • the chute corresponding to the slider includes a first chute wall and a second chute wall, the first The chute wall and the second chute wall are arranged oppositely; wherein, the first roller and the second roller are in contact with the first chute wall of the chute, and the third roller is in contact with the chute The second chute wall contacts.
  • connection line between the axis of the first roller and the axis of the second roller is substantially parallel to the corresponding first chute wall and the second chute wall of the chute
  • a line passing through the axis of the third roller and parallel to the first and second chute walls of the chute is connected to the axis of the first roller and the axis of the second roller The lines do not coincide.
  • planes passing through the axes of the first roller, the second roller, and the third roller and perpendicular to the first direction are a first plane, a second plane, and a third plane, The first plane, the second plane, and the third plane do not coincide, and the first plane, the second plane, and the third plane are sequentially arranged in the first direction.
  • the chute includes a chute wall, the chute wall has a groove, a slide bar is embedded in the groove, a part of the slide bar protrudes from the groove, in the A semi-cylindrical protrusion is formed on the wall of the chute.
  • first roller, the second roller, and the third roller are respectively provided with a first groove, a second groove, and a third groove along their radial directions;
  • the chute includes a first chute wall and a second chute wall, the first chute wall has a first semi-cylindrical protrusion toward the inside of the chute, the second chute wall has Towards the second half cylinder inside the chute Bulge
  • the first semi-cylindrical protrusion is embedded in the first groove and the third groove
  • the second semi-cylindrical protrusion is embedded in the second groove, so that the first roller and the third The roller can slide along the first semi-cylindrical protrusion, and the second roller can slide along the second semi-cylindrical protrusion; or, the first semi-cylindrical protrusion can be embedded in the first groove and the first Two grooves, the second semi-cylindrical protrusion is embedded in the third groove, so that the first roller and the second roller can slide along the first semi-cylindrical protrusion, and the third roller can be along the The second semi-cylindrical protrusion slides.
  • the connecting portion includes a second plate and a matching portion located on the second plate, the second plate is located on the first surface side of the first plate, and the second plate A part of the surface opposite to the first plate is fixedly connected to the slider; the fitting part is connected to the driving part.
  • the driving part includes a transmission part, the transmission part is connected to the matching part for transmitting power to the connection part; the transmission part includes a transmission rod, the transmission rod along the first Direction extends.
  • a light-curing 3D printing device including: a cavity, a resin tank, a display device, a printing platform, and any kind of lifting mechanism;
  • the resin tank is provided inside the cavity;
  • the bottom of the resin tank is provided with a display device
  • the printing platform is provided above the resin tank, and the printing platform is connected to the connection portion of the lifting mechanism.
  • the first direction is a vertical direction
  • the printing surface of the printing platform is a horizontal plane.
  • the lifting mechanism uses a chute as a guide rail, and the slider slides in the chute.
  • the sliding between the two can be performed by sliding components such as rollers, pulleys, gears, etc. It is not easy to be damaged and falls off, and it is easy to replace. In case of damage, only the damaged parts need to be replaced individually, without the need to replace the guide rails and sliders as a whole, which is convenient for equipment maintenance and saves costs;
  • the present invention can adjust the sliding member of the lifting mechanism is arranged on the slider, can be adjusted by sliding Parts Fine-tune the position of and adjust the gap between the chute and the slider to ensure the precision of the two;
  • the chute and the support plate are integrally formed to avoid assembly deviations generated during the assembly of the guide rail and the support plate, and can prevent the printing platform from being used in the daily use process.
  • the relative movement of the guide rail and the support plate caused by frequent up and down movements affects the smooth sliding of the slider and the up and down movement of the printing platform.
  • the chute and the support plate are integrally formed. In the preparation process of the parts, only one mold is needed to complete the preparation of the chute and the support plate, which saves materials and significantly saves costs;
  • the chute guide rail, the chute and the support plate are integrally provided, and the position of the sliding part of the slider is adjustable.
  • the accuracy of the sliding fit between the slider and the chute can be fully ensured, and It can ensure that the sliding obstruction between the slider and the chute caused by the skew of the transmission component is fully compensated, and even if the transmission component is skewed to a large extent, the smoothness of the slider sliding can be ensured.
  • FIG. 1 is a schematic diagram of a photo-curing 3D printing device equipped with a lifting mechanism
  • FIG. 2 is a schematic diagram of an assembly structure of a slider and a chute according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a slider structure according to an embodiment of the invention.
  • FIG. 4 is a top view of an assembly structure of a slider and a chute according to an embodiment of the invention.
  • FIG. 5 is a schematic diagram of an assembly structure of a slider, a chute, and a connecting portion according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of an embodiment of a photocurable 3D printing device equipped with a lifting mechanism of the present invention.
  • the elevating mechanism includes a first plate 1 as a support plate, a slide slot 2, a slider 3, a driving portion (not shown) including a transmission member 4, and a connecting portion 5.
  • the sliding slot 2 is provided on the surface of the first plate 1, the slider 3 and the sliding slot 2 slidingly cooperate, and the driving part outputs power and transmits the power through the transmission member 4.
  • the transmission member 4 is connected to the slider 3 through the connecting portion 5 and transmits power to the slider 3.
  • the first plate 1 is disposed in the printing chamber along the first direction.
  • the first direction may be, for example, a vertical direction, and the vertical direction is a direction perpendicular to the resin plane in the resin tank.
  • the first direction may also be a direction with an angle of less than 45° from the vertical direction, for example, to adapt to different shapes such as products with a certain inclination.
  • the first plate 1 may be fixedly disposed on the rear wall of the printing chamber, or may be disposed on any side wall of the printing chamber.
  • the first plate 1 can also be directly set as the rear wall or one side wall of the printing chamber. In this way, it can be avoided that the first plate 1 and the rear wall or side wall of the printing chamber are fixedly arranged.
  • this arrangement can simplify the components of the light-curing 3D printing device, make the device compact, and more suitable for the preparation of a desktop 3D printing device.
  • the first plate 1 may be prepared from at least one of metal, ceramic, resin, and glass.
  • the metal may be at least one of steel, zhao, zhao alloy, magnesium, magnesium alloy, Qin, Qin alloy, copper, copper alloy, nickel, nickel alloy, zinc, zinc alloy; preferably has higher hardness and wear resistance Steel; more preferably wear-resistant stainless steel.
  • the ceramic may be at least one of alumina, aluminum nitride, silicon nitride, and zirconium nitride; preferably alumina.
  • the resin may be at least one of polyetheretherketone, polyvinylidene fluoride, high molecular weight polyethylene, phenol resin, and acrylic resin.
  • the glass is preferably tempered glass.
  • the chute 2 is used as a guide rail of the lifting mechanism to provide a guiding effect.
  • the cooperation between the sliding groove 2 and the slider is more precise, and the sliding of the slider is smoother.
  • the present invention uses a chute as a guide rail, the slider slides in the chute, the sliding between the two can be performed by sliding members such as rollers, pulleys, gears, etc., which is not easy to damage and fall off.
  • the chute and the slider can be prepared or purchased separately, and then assembled. The same chute can be used for different sliders. Even if the slider is damaged, it can be quickly maintained only by replacing the slider, saving maintenance costs.
  • the gap between the linear convex guide rail sliding by the ball and the slider cannot be adjusted, and the precision of the cooperation between the guide rail and the slider needs to be guaranteed during the preparation process of the guide rail. Due to frequent up and down movements during use, the precision of the fit between the guide rail and the slider is prone to deviation. After the deviation occurs, it cannot be effectively corrected, and only the new guide rail and slider can be replaced.
  • the sliding groove and the slider of the present invention are slid by sliding members such as rollers, pulleys, and gears provided on the slider.
  • the sliding member is adjustably arranged on the slider, and can be further adjusted by fine-tuning the position of the sliding member. Adjust the gap between the chute and the slider to ensure the precision of the two.
  • the chute 2 and the first plate 1 are integrally formed. That is, by controlling the shape of the forming mold, during the preparation of the first plate 1, a chute 2 is directly formed on the surface of the first plate 1.
  • the guide rail and the support platform are separately purchased or prepared.
  • the guide rail generally adopts a linear guide rail, and is fixedly installed on the support platform through bolts and other components.
  • the sliding groove 2 and the first plate 1 are integrally formed in the present invention to avoid the assembly deviation generated during the assembly of the guide rail and the support plate, and the lifting mechanism can be avoided During daily use, the relative movement of the guide rail and the support plate due to frequent up and down movements of the printing platform ensures smooth sliding of the slider.
  • chute 2 and the first plate 1 are integrally formed. In the preparation process of the parts, only one mold is needed to complete the preparation of the chute and the support plate, saving materials and significantly saving costs.
  • chutes 2 there are at least two chutes 2.
  • the first chute 6 and the second chute 7 are both arranged vertically on the first plate 1 On the surface inside the printing chamber.
  • the first chute 6 and the second chute 7 are parallel to each other.
  • the first slide groove 6 and the second slide groove 7 are provided, and the first slide groove 6 and the second slide groove 7 are formed integrally with the first plate 1 Even if the transmission member 4 is twisted and the position is shifted to a certain extent, due to the mutual restraint and error correction of the two slide rails, the slider 3 can smoothly slide in the slide groove 2.
  • the restriction force between the slider and the slide rail caused by the deviation of the transmission member 4 can be achieved Even if the transmission member 4 is shifted by a large angle, the slider can still slide smoothly. That is, by using the chute as a guide rail and using a slider with a sliding member whose position can be adjusted, in combination with setting the chute to at least two, the slider sliding due to the deviation of the transmission member 4 can be effectively avoided Badly set the problem of stuck.
  • FIG. 2 shows a structure of a chute according to an embodiment of the present invention.
  • Both the first chute 6 and the second chute 7 include a chute wall 10 and an opening 11; the chute wall 10 is provided on both sides of the opening 11; and a semi-cylindrical protrusion is formed on the chute wall 10.
  • a groove 12 is formed on the chute wall 10
  • a slide bar 13 is embedded in the groove 12
  • a part of the slide bar 13 protrudes from the groove 12, and then on the chute wall 10
  • the semi-cylindrical protrusions can also be integrally formed with the chute wall 10.
  • the chute wall 10 is formed with teeth that can mesh with the gear.
  • the slider 3 includes a slider body 14, and a baffle 15 is provided on the upper and lower ends of the slider body 14, respectively. Both sides of the raised portion 16 have an arc-shaped notch 17 on each side; the raised portion 16 has a shape corresponding to the opening 11 and a size corresponding to the depth of the opening 11.
  • the arc-shaped notch 17 has a shape suitable for passing semi-cylindrical protrusions or teeth formed on the chute wall 10.
  • At least one sliding member is provided on one surface of the slider body 14.
  • the sliding member is provided as a roller 18. As shown in FIG. 4, the roller 18 is in sliding fit with a semi-cylindrical protrusion formed on the chute wall 10.
  • the number of rollers 18 is preferably at least two, and most preferably three.
  • only one roller 18 is provided in each slider, and the roller 18 slides against a semi-cylindrical protrusion formed on at least one sliding groove wall 10 of the sliding groove.
  • the chute 2 includes a first chute 6 and a second chute 7,
  • the slider 3 includes a first slider 8 and a second slider 9; the first slide The block 8 slidingly cooperates with the first sliding slot 6, and the second slider 9 and the second sliding slot 7 slidingly fit.
  • Both include a first chute wall 28 and a second chute wall 29.
  • the first chute wall 28 is disposed opposite to the second chute wall 29.
  • Only one roller 18 is provided in both the first slider 8 and the second slider 9. In this embodiment, the roller 18 provided on the first slider 8 is in contact with the first slide wall 28 of the first slide 6, and the roller 18 provided on the second slider 9 and the second slide 7 of the second slide 7 The chute wall 29 is in contact.
  • roller 18 provided on the first slider 8 is in contact with the first slide wall 28 and the second slide wall 29 of the first slide 6, and the second slide 9 is provided Roller 18 and second chute 7
  • the first chute wall 28 and the second chute wall 29 are in contact.
  • both the first slider 8 and the second slider 9 are provided with two rollers 18, that is, the roller 18 specifically includes a first roller 19 and a second roller 20.
  • the first roller 19 provided on the first slider 8 is in contact with the first chute wall 28 of the first chute 6, and the second roller 20 provided on the first slider 8 is in contact with the first chute 6 the second chute wall 29 is in contact;
  • the first roller 19 provided on the second slider 9 is in contact with the first chute wall 28 of the second slide 7, and the second roller 20 provided on the second slider 8 is in contact with The second chute wall 29 of the second chute 7 is in contact.
  • the axis of the first roller 19 and the second roller 20 may be located at different levels and intersect Wrong setting. But more preferably, in one embodiment, the axes of the first roller 19 and the second roller 20 are located on the same horizontal plane.
  • the number of rollers 18 in each slider is three, two pulleys in the three rollers are in contact with one chute wall of the chute, and the other pulley is in contact with the other of the chute.
  • the groove wall is in contact.
  • the roller 18 includes a first roller 19, a second roller 20, and a third roller 21; the first roller 19 and the third roller 21 are in contact with the first chute wall 28 of the chute, The second roller 20 is in contact with the second chute wall 29 of the chute.
  • the axes of rotation of the two rollers respectively in contact with the two chute walls of the chute are in the same horizontal plane.
  • the rotation axes of the three rollers are all at different horizontal planes.
  • the axes of rotation of the three rollers are at different levels, and the axis of rotation of one of the two rollers in contact with the same chute wall is at the relatively highest level The axis of the rotation axis of the other roller is at a relatively lowest level, and the axis of the rotation axis of the rollers in contact with the wall of the other chute among the three rollers is at a level between the highest level and the lowest level.
  • the axes of the rotation axes of the first roller 19, the second roller 20, and the third roller 21 are all in different horizontal planes and are in contact with the same chute wall Of the first roller 19 and the second roller 20 of the first roller 19 are at a relatively high level, the axis of the second roller 20 is at a relatively low level, and the three rollers slide with the other
  • the axis of the rotation axis of the third roller 21 that the groove wall contacts is at a level between the highest level and the lowest level.
  • the rotation axes of the three rollers are connected in a triangular shape, and the triangular structure is the most stable. Compared with other methods, this setting can ensure the stability of the slider during frequent up and down sliding. Sex and accuracy.
  • the first roller 19, the second roller 20, and the third roller 21 are respectively provided with a first groove, A second slot and a third slot;
  • the chute 2 includes a first chute wall 28 and a second chute wall 29, the first chute wall 28 has a direction toward the inside of the chute 2 A first semi-cylindrical protrusion, the second chute wall 29 has a second semi-cylindrical protrusion toward the inside of the chute;
  • the first semi-cylindrical protrusion is embedded in the first groove and the third Groove, the second semi-cylindrical protrusion is embedded in the second groove, so that the first roller 19 and the third roller 21 can slide along the first semi-cylindrical protrusion, the second roller 20 Capable of sliding along the second semi-cylindrical protrusion; or, the first semi-cylindrical protrusion is embedded in the first groove and the second groove, and the second semi-cylindrical protrusion is embedded in the
  • the position of at least one roller 18 can be adjusted.
  • the tilt of the printing platform position will cause abnormal force on the roller in the slider, although the roller setting method described in the above embodiment can avoid the slider movement to a certain extent
  • the obstruction can ensure the normal sliding of the slider.
  • the long-term existence of abnormal force on the roller will gradually affect the sliding accuracy of the slider, and will also have a negative impact on the life of the roller and the slider.
  • the position of the roller By setting the position of the roller to be adjustable, when the inclination of the position of the printing platform causes the position of the transmission component to shift and thereby cause abnormal force on the roller in the slider, the fine force is adjusted by the position of the roller to release the abnormal force, Therefore, the rebalance configuration of the interaction force between each roller and the chute wall is realized, and the service life and sliding precision of the slider are guaranteed.
  • the gap between the slider and the wall of the chute can be adjusted by fine-tuning the position of the roller.
  • This setting can achieve a "0" gap between the slider and the chute wall, ensuring smooth sliding, which is not possible with the linear guide rails used in conventional lifting platforms.
  • the “one” type notch can be provided on the slider body to set the rotation axis of the roller in the “one” type notch, the “one” type notch is not parallel to the first direction
  • the roller 18 and the first chute wall 28 and the second chute wall 29 are subjected to more balanced forces, reducing losses.
  • the notch may also be arc-shaped.
  • the position setting of the roller 18 can also be adjusted by setting the roller 18 as an eccentric.
  • the sliding member is provided as a roller 18, and the roller 18 is in sliding fit with a semi-cylindrical protrusion formed on the chute wall 10.
  • the sliding member may also be provided as a gear, and the gear meshes with the teeth formed on the chute wall 10, and the engagement of the gear and the teeth ensures that the slider slides up and down in the chute.
  • At least one gear may be set to have an adjustable position, thereby ensuring the service life of the slider and the precision of sliding.
  • the lifting mechanism of the present invention further includes a driving portion.
  • the driving section includes a transmission member 4.
  • the driving part provides power, and the transmission part 4 transmits the power to the printing platform and the slider.
  • a motor may be used to provide power.
  • a transmission rod such as a screw or a chain can be used.
  • the transmission member 4 is selected as a screw.
  • the motor of the driving part drives the screw to rotate, and the connecting part 5 is sleeved with the screw to convert the rotation of the screw into a linear up and down movement of the connecting part 5, which in turn drives the printing platform and the slider 3 to move up and down.
  • the lifting mechanism of the present invention further includes a connecting portion 5.
  • One surface of the connecting portion 5 is connected to the slider body 14 of the slider, and the other surface of the connecting portion 5 is connected to the printing platform.
  • the connecting portion 5 includes a second plate 22, and a part of the surface of the second plate 22 is connected to the slider body 14 of the slider, wherein the bolt may be detachably connected, or may be fixedly connected by welding, riveting, or the like.
  • the connecting portion 5 is also provided with a first fitting portion.
  • the first matching part cooperates with the transmission member 4 to transmit the driving force supplied by the driving part to the printing platform and the slider.
  • the first mating portion is a hole 23 provided on the connecting portion 5
  • the hole 23 has a structure that can cooperate with the screw rod, and The cooperation of the holes 23 converts the rotation of the screw rod into the linear up-and-down movement of the connecting part 5, and then transmits the driving force supplied by the driving part to the printing platform and the slider.
  • the photocurable 3D printing device has a cavity 24, a resin tank 25 is provided inside the cavity 24, a display device is provided at the bottom of the resin tank 25, and a printing platform 26 is provided above the resin tank 25 , Print The platform 26 is connected to the connecting portion 5 of the lifting mechanism of the present invention, and the driving force output by the driving portion of the lifting mechanism is transmitted to the printing platform 26 through the connecting portion 5 of the lifting mechanism and the transmission member 4 to realize the vertical movement of the printing platform 26.

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  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
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  • Optics & Photonics (AREA)

Abstract

L'invention concerne un mécanisme d'élévation, comprenant une première plaque, un rail de guidage, un bloc coulissant, une partie d'entraînement et une partie de connexion. Le rail de guidage comprend au moins deux rainures coulissantes disposées sur une première surface de la première plaque ; lesdites au moins deux rainures coulissantes sont parallèles l'une à l'autre et s'étendent le long d'une première direction, la première direction étant parallèle à la première surface de la première plaque ; les rainures coulissantes et la première plaque forment un corps intégral ; au moins un bloc coulissant est disposé dans chaque rainure coulissante, le bloc coulissant s'adaptant de manière coulissante avec la rainure coulissante correspondante ; la partie de connexion est connectée au bloc coulissant, à la partie d'entraînement et à une plateforme d'impression de telle sorte que la partie de connexion amène, sous l'entraînement de la partie d'entraînement, le bloc coulissant et la plateforme d'impression à se déplacer le long de la première direction. Le rail de guidage avec des rainures coulissantes, le corps intégral formé par les rainures coulissantes et la plaque de support et le bloc coulissant avec un élément coulissant ayant une position réglable garantissent suffisamment la précision d'adaptation coulissante entre le bloc coulissant et les rainures coulissantes, et assurent une compensation suffisante de l'obstruction de coulissement entre le bloc coulissant et les rainures coulissantes provoquée par la déviation de la partie de transmission, garantissant ainsi le coulissement régulier du bloc coulissant même si l'angle de déviation de la partie de transmission est grand.
PCT/CN2019/114927 2018-12-17 2019-11-01 Mécanisme d'élévation et dispositif d'impression 3d photodurcissable WO2020125232A1 (fr)

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