WO2017193819A1 - 激光3d打印机用万向载物台 - Google Patents

激光3d打印机用万向载物台 Download PDF

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Publication number
WO2017193819A1
WO2017193819A1 PCT/CN2017/082192 CN2017082192W WO2017193819A1 WO 2017193819 A1 WO2017193819 A1 WO 2017193819A1 CN 2017082192 W CN2017082192 W CN 2017082192W WO 2017193819 A1 WO2017193819 A1 WO 2017193819A1
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WO
WIPO (PCT)
Prior art keywords
hole
telescopic connecting
bottom end
ball screw
connecting rod
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PCT/CN2017/082192
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English (en)
French (fr)
Inventor
周双留
李宝良
吴寅
阳鹏
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江苏锐辰光电技术有限公司
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Publication of WO2017193819A1 publication Critical patent/WO2017193819A1/zh

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    • 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
    • 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 field of 3D printing, and more particularly to a universal stage for a laser 3D printer.
  • Laser 3D printing is a technique for constructing objects by layer-by-layer printing and bonding based on mathematical model files and using adhesive materials such as special wax materials, powdered metals or plastics. Contrary to traditional material processing, it is a new type of three-dimensional printing that is manufactured layer by layer by adding materials.
  • adhesive materials such as special wax materials, powdered metals or plastics.
  • SLA photosensitive resin selective curing process
  • the rationality and optimization of the 3D printing optical path system directly affect the accuracy, speed and stability of printing.
  • a rapid prototyping SLA 3D printer and its printing method disclosed in CN104228068A the lifting table arranged above the vertical slot can only be used up and down. Movement, the deflection angle cannot be adjusted according to the change in the angle of the resin surface in the resin tank, and when the resin surface angle in the resin pool is inclined, the hanging table cannot be well bonded to the resin surface, and printing is performed during the printing process.
  • each layer of printing requires the staff to adjust the tilt angle of the hanging table according to the angle of the resin surface, which is not only time-consuming and laborious, but also affects the 3D printing effect, and cannot guarantee the accuracy, speed and stability of the printing.
  • Sexual requirements, especially in high-end applications such as jewelry modeling, dental tooth models, and hand model, are even less able to meet their application needs.
  • the technical problem to be solved by the present invention is to provide a universal carrier for a laser 3D printer which has a simple structure, simple control and good printing effect.
  • the universal 3D printer of the invention comprises a knob, a ball screw, a telescopic connecting ring, a telescopic connecting rod and a carrier.
  • the top end of the ball screw is screwed to the bottom end of the knob, and the outer side of the ball screw below the knob is sleeved.
  • the outer sleeve of the spring is provided with a fixed connecting sleeve
  • the edge of the fixed connecting sleeve is fixedly connected with the carrier connecting frame
  • the bottom end of the ball screw is provided with a telescopic connecting ring
  • the bottom end of the telescopic connecting ring is provided with a hemispherical first groove
  • a first through hole is defined in an intermediate position of the first groove
  • the telescopic connecting ring is sleeved on the ball screw through the first through hole
  • the outer wall of the spherical structure at the bottom end of the ball screw and the inside of the first groove The wall is in contact with the gap, and a gap is reserved between the inner edge of the first through hole and the outer wall of the ball screw.
  • the bottom end of the telescopic connecting ring is connected to the top end of the telescopic connecting rod, and the bottom end of the telescopic connecting rod is connected with the top end of the stage.
  • the universal 3D printer of the present invention has a top plate, wherein a top plate is arranged above the fixed connecting sleeve, and a top end of the fixed connecting sleeve and a bottom end edge of the top plate are fixedly connected by screws, and a ninth pass is opened in the middle position of the top plate.
  • the hole and the top plate are sleeved on the ball screw through the ninth through hole.
  • the universal 3D printer of the present invention has a gimbal between the telescopic connecting rod and the stage, and a second through hole is formed in the middle of the protective sleeve, and the lower part of the telescopic connecting rod extends into the second pass.
  • a third through hole and a fourth through hole are respectively defined in the outer wall of the protective sleeve and the telescopic connecting rod, and the positions of the third through hole and the fourth through hole correspond to the third through hole and the fourth through hole.
  • a first locking screw is disposed, and a fifth through hole is further defined in the outer wall of the protective sleeve, the fifth through hole is communicated with the third through hole, and the first through hole is provided with a sixth through hole, a sixth through hole and Corresponding to the position of the fifth through hole, a second locking screw is disposed in the fifth through hole and the sixth through hole, and a rotation preventing pin is connected between the telescopic connecting rod and the protective cover.
  • the universal 3D printer of the present invention has a stepped seventh through hole at the top end of the telescopic connecting rod, and a first blind hole is opened at a corresponding position of the top end of the protective sleeve, and the rotation preventing pin is disposed in the seventh through hole. And in the first blind hole.
  • the laser 3D printer of the present invention uses a gimbal stage, wherein the stage is disposed in a horizontal direction.
  • the universal stage for the laser 3D printer of the present invention is different from the prior art in that the present invention can automatically adjust the tilt angle of the stage according to the pressure applied to the stage by the surface of the resin pool to ensure the bottom of the stage.
  • the end is closely attached to the surface of the resin, and the stage is positioned on the offset angle by tightening the first locking screw and the knob, so that the bottom end of the stage is always in contact with the resin during the entire 3D printing process.
  • the surface fits snugly, avoiding the need for a lot of manpower and time to adjust the stage.
  • the second locking screw is provided to strengthen the first locking screw and ensure the position between the protective sleeve and the telescopic connecting rod.
  • a stop pin is arranged between the protective sleeve and the telescopic connecting rod to ensure that no rotation occurs between the protective sleeve and the telescopic connecting rod, thereby enhancing the stability of the universal stage. It can be connected to the lifting mechanism of the 3D printer in a variety of ways, which is easy to install and easy to adjust.
  • FIG. 1 is a perspective view of a universal stage for a laser 3D printer of the present invention
  • FIG. 2 is a front cross-sectional view of a universal stage for a laser 3D printer of the present invention
  • FIG 3 is a left side cross-sectional view of the universal stage for a laser 3D printer of the present invention.
  • the universal carrier for the laser 3D printer of the present invention comprises a knob 2 , a ball screw 8 , a telescopic connecting ring 1 , a telescopic connecting rod 10 , a protective sleeve 4 and a stage .
  • the top end of the ball screw 8 and the bottom end of the knob 2 are screwed, the outer side of the ball screw 8 below the knob 2 is sleeved with a spring 9, the outer side of the spring 9 is sleeved with a fixed connecting sleeve 6, and the top of the fixed connecting sleeve 16 is provided with a top plate 20
  • the top end of the fixed connecting sleeve 16 and the bottom end edge of the top board 20 are fixedly connected by screws.
  • a ninth through hole is opened in the middle of the top plate 20, and the top plate 20 is sleeved on the ball screw 8 through the ninth through hole, and the edge of the fixed connecting sleeve 6 is fixedly connected with the carrier connecting frame 3, and the universal stage is When the end of the elevating mechanism of the 3D printer is connected, the end of the elevating mechanism of the 3D printer is fixedly coupled to the stage connecting frame 3, thereby completing the fixing of the gimbal by the stage connecting frame 3.
  • the bottom end of the ball screw 8 is provided with a telescopic connecting ring 1 , and a semi-spherical first groove is disposed at an intermediate position of the bottom end of the telescopic connecting ring 1 , and a first through hole is opened in a middle position of the first groove, and the first through hole is stretched
  • the connecting ring 1 is sleeved on the ball screw 8.
  • the outer wall of the spherical structure at the bottom end of the ball screw 8 is in mating contact with the inner wall of the first groove, and a gap is reserved between the inner edge of the first through hole and the outer wall of the ball screw 8.
  • the telescopic connecting ring 1 is allowed to swing at a certain angle on the spherical structure at the bottom end of the ball screw 8.
  • the bottom end of the telescopic connecting ring 1 is connected to the top end of the telescopic connecting rod 10 by bolts, and the lower part of the telescopic connecting rod 10 extends into the second through hole opened in the middle of the protective sleeve 4, respectively on the outer wall of the protective sleeve 4 and the telescopic connecting rod 10 Opening a third through hole and a fourth through hole corresponding to the positions of the third through hole and the fourth through hole, wherein the first locking screw 11 is disposed in the third through hole and the fourth through hole, and the first lock is tightened
  • the tightening screw 11 can fasten the connection between the protective cover 4 and the telescopic connecting rod 10.
  • a fifth through hole 13 is further defined in the outer wall of the protective cover 4, and the intermediate positions of the fifth through hole 13 and the third through hole communicate with each other.
  • a sixth through hole is defined in the first locking screw 11 , and a position of the sixth through hole and the fifth through hole 13 is correspondingly disposed, and a second locking screw is disposed in the fifth through hole 13 and the sixth through hole.
  • a stepped seventh through hole is defined in the top end of the telescopic connecting rod 10, a first blind hole 19 is defined at a corresponding position of the top end of the protective sleeve 4, and a rotation preventing pin 12 is disposed in the seventh through hole and the first blind hole 19 to ensure protection No rotation occurs between the sleeve 4 and the telescopic connecting rod 10.
  • the bottom end of the protective cover 4 is connected to the top end of the stage 5 placed in the horizontal direction by bolts.
  • the working principle of the invention is that the knob 2 is loosened before the 3D printing is performed, so that the knob 2, the fixed connecting sleeve 6 and the telescopic connecting ring 1 are in a relaxed state, and the telescopic connecting ring 1 can be at the bottom end of the ball screw 8 at this time.
  • the spherical structure is oscillated at a certain angle, so that the stage 5 can also be swung at a certain angle by the expansion and contraction ring 1.
  • the driving motor of the 3D printer drives the lifting mechanism to move downward, and gradually approaches the resin pool located directly below when the stage 5 moves downward until the bottom end of the stage 5 contacts the resin surface and A certain pressure is generated, and the inclination angle of the download stage 5 is shifted by the action of the pressure, so that the bottom end of the stage 5 is in full contact with the resin surface.
  • the driving motor is turned off, and the first locking screw 11 and the knob 21 are sequentially tightened, so that the knob 2, the fixed connecting sleeve 6 and the telescopic connecting ring 1 are pressed together.
  • the inclination angle of the stage 5 can be automatically adjusted according to the pressure applied to the stage 5 by the surface of the resin pool, and the bottom end of the stage 5 is closely adhered to the resin surface. And positioning the stage 5 on the basis of the offset angle by tightening the first locking screw 11 and the knob 2, so that the bottom end of the stage 5 is always closely attached to the resin surface during the entire 3D printing process.
  • the second locking screw is provided to strengthen the first locking screw 11 and ensure the fixing between the protective sleeve 4 and the telescopic connecting rod 10.
  • a rotation preventing pin 12 is disposed between the protective cover 4 and the telescopic connecting rod 10 to ensure that no rotation occurs between the protective cover 4 and the telescopic connecting rod 10, thereby enhancing the stability of the universal stage 5. It can be connected to the lifting mechanism of the 3D printer in a variety of ways, which is easy to install and easy to adjust.
  • the invention has the advantages of simple structure, simple control and improved 3D printing effect, and has obvious advantages compared with the prior art.

Abstract

一种激光3D打印机用万向载物台，包括旋钮(2)、球螺杆(8)、伸缩连接环(1)、伸缩连接杆(10)和载物台(5)，球螺杆(8)顶端与旋钮(2)底端通过螺纹连接，旋钮(2)下方的球螺杆(8)外侧套设有弹簧(9)，弹簧(9)的外侧套设有固定连接套(6)，球螺杆(8)底端设置有伸缩连接环(1)，伸缩连接环(1)底端设置有半球形第一凹槽，第一凹槽的中间位置开设有第一通孔，通过第一通孔将伸缩连接环(1)套设在球螺杆(8)上，球螺杆(8)底端的球形结构的外壁与第一凹槽的内壁配合接触，第一通孔的内侧边缘与球螺杆(8)的外壁之间预留有空隙，伸缩连接环(1)底端与伸缩连接杆(10)顶端连接，伸缩连接杆(10)与防护套(4)连接，防护套(4)底端与沿水平方向放置的载物台(5)顶端连接。该万向载物台结构简单、操控简便、打印效果好。

Description

激光3D打印机用万向载物台 技术领域
本发明涉及3D打印领域，特别是涉及一种激光3D打印机用万向载物台。
背景技术
激光3D打印是以数学模型文件为基础，运用特殊蜡材、粉末状金属或者塑料等可粘合材料，通过逐层打印粘合的方法来构造物体的技术。它与传统的材料加工截然相反，是一种通过增加材料从而进行逐层制造的新型立体打印形式。而随着3D打印技术的快速发展，凭借速度和精度的优势，作为新型能源的激光技术被广泛应用到3D打印中，其中光敏树脂选择性固化工艺(SLA)占据了市场的主导地位。SLA采用立体雕刻的原理，在树脂槽中盛满液态光敏树脂，并在紫外激光的扫描照射下快速固化，直接得到树脂或类似工程塑料的产品。
3D打印光路系统的合理性以及优化程度直接影响打印的精度、速度和稳定性，如CN104228068A公开的一种快速成型的SLA 3D打印机及其打印方法，设置在竖直槽上方的吊台只能上下运动，无法根据树脂槽内的树脂面的角度变化进行偏斜角度的调整，在树脂池内的树脂面角度倾斜的情况下吊台无法与树脂面很好的贴合，在打印过程中为了使打印效果最佳，每打印一层就需要工作人员根据树脂面的角度对吊台的倾斜角度进行调整，不仅费时费力，还会对3D打印效果造成影响，根本无法保证打印的精度、速度和产品稳定性的要求，特别在珠宝建模、牙科齿模、手板模型等高端应用领域，更无法满足其应用需求。
发明内容
本发明要解决的技术问题是提供一种结构简单、操控简便、打印效果好的激光3D打印机用万向载物台。
本发明激光3D打印机用万向载物台，包括旋钮、球螺杆、伸缩连接环、伸缩连接杆和载物台，球螺杆顶端与旋钮底端通过螺纹连接，旋钮下方的球螺杆外侧套设有弹簧，弹簧的外侧套设有固定连接套，固定连接套的边缘与载物台连接架固定连接，球螺杆底端设置有伸缩连接环，伸缩连接环底端设置有半球形第一凹槽，第一凹槽的中间位置开设有第一通孔，通过第一通孔将伸缩连接环套设在球螺杆上，球螺杆底端的球形结构的外壁与第一凹槽的内 壁配合接触，第一通孔的内侧边缘与球螺杆的外壁之间预留有空隙，伸缩连接环底端与伸缩连接杆顶端连接，伸缩连接杆底端与载物台的顶端连接。
本发明激光3D打印机用万向载物台，其中所述固定连接套上方设置有顶板，固定连接套的顶端与顶板的底端边缘之间通过螺钉固定连接，顶板的中间位置开设有第九通孔，顶板通过第九通孔套设在球螺杆上。
本发明激光3D打印机用万向载物台，其中所述伸缩连接杆与载物台之间设置有防护套，防护套中间位置开设有第二通孔，伸缩连接杆下部伸入到第二通孔中，防护套和伸缩连接杆的外壁上分别开设有第三通孔和第四通孔，第三通孔和第四通孔的位置相对应，在第三通孔和第四通孔中设置有第一锁紧螺钉，防护套的外壁上还开设有第五通孔，第五通孔与第三通孔连通，第一锁紧螺钉上开设有第六通孔，第六通孔和第五通孔的位置相对应，在第五通孔和第六通孔中设置有第二锁紧螺钉，伸缩连接杆与防护套之间连接有止转销。
本发明激光3D打印机用万向载物台，其中所述伸缩连接杆顶端开设有阶梯形第七通孔，防护套顶端的对应位置开设有第一盲孔，止转销设置在第七通孔和第一盲孔中。
本发明激光3D打印机用万向载物台，其中所述载物台沿水平方向设置。
本发明激光3D打印机用万向载物台与现有技术不同之处在于：本发明能够根据树脂池表面对载物台施加的压力，自动调整对载物台的倾斜角度，保证载物台底端与树脂表面紧密贴合，并通过拧紧第一锁紧螺钉和旋钮对载物台在所偏移角度的基础上进行定位，使载物台的底端在整个3D打印的过程中始终与树脂表面紧密贴合，避免占用大量人力和时间对载物台进行调整。设置有第二锁紧螺钉，能够对第一锁紧螺钉起到加固作用，保证防护套和伸缩连接杆之间位置的固定。在保证防护套和伸缩连接杆之间设置有止转销，保证防护套和伸缩连接杆之间不发生转动，增强了万向载物台的稳定性。可通过多种方式与3D打印机的升降机构连接，安装方便，便于调节。
下面结合附图对本发明激光3D打印机用万向载物台作进一步说明。
附图说明
图1为本发明激光3D打印机用万向载物台的立体图；
图2为本发明激光3D打印机用万向载物台的正视剖视图；
图3为本发明激光3D打印机用万向载物台的左视剖视图。
具体实施方式
如图1、图2、图3所示，为本发明激光3D打印机用万向载物台，包括旋钮2、球螺杆8、伸缩连接环1、伸缩连接杆10、防护套4和载物台5，球螺杆8顶端与旋钮2底端通过螺纹连接，旋钮2下方的球螺杆8外侧套设有弹簧9，弹簧9的外侧套设有固定连接套6，固定连接套16上方设置有顶板20，固定连接套16的顶端与顶板20的底端边缘之间通过螺钉固定连接。顶板20的中间位置开设有第九通孔，顶板20通过第九通孔套设在球螺杆8上，固定连接套6的边缘与载物台连接架3固定连接，在万向载物台与3D打印机的升降机构端部的连接时，3D打印机的升降机构端部与载物台连接架3固定连接，从而完成通过载物台连接架3对万向载物台的固定。球螺杆8底端设置有伸缩连接环1，伸缩连接环1底端的中间位置设置有半球形第一凹槽，第一凹槽的中间位置开设有第一通孔，通过第一通孔将伸缩连接环1套设在球螺杆8上，球螺杆8底端的球形结构的外壁与第一凹槽的内壁配合接触，第一通孔的内侧边缘与球螺杆8的外壁之间预留有空隙，使伸缩连接环1能够在球螺杆8底端的球形结构上进行一定角度的摆动。伸缩连接环1底端通过螺栓与伸缩连接杆10顶端连接，伸缩连接杆10下部伸入到防护套4中间位置开设的第二通孔中，在防护套4和伸缩连接杆10的外壁上分别开设有第三通孔和第四通孔，第三通孔和第四通孔的位置相对应，在第三通孔和第四通孔中设置有第一锁紧螺钉11，拧紧第一锁紧螺钉11能够使防护套4和伸缩连接杆10之间紧固连接。在防护套4的外壁上还开设有第五通孔13，第五通孔13与第三通孔的中间位置相互连通。在第一锁紧螺钉11上开设有第六通孔，第六通孔和第五通孔13的位置相对应，在第五通孔13和第六通孔中设置有第二锁紧螺钉，从而对第一锁紧螺钉11起到加固作用，保证防护套4和伸缩连接杆10之间位置的固定。伸缩连接杆10顶端开设有阶梯形第七通孔，防护套4顶端的对应位置开设有第一盲孔19，在第七通孔和第一盲孔19中设置有止转销12，保证防护套4和伸缩连接杆10之间不发生转动。防护套4的底端通过螺栓与沿水平方向放置的载物台5的顶端连接。
本发明的工作原理为：在进行3D打印之前旋松旋钮2，使旋钮2、固定连接套6和伸缩连接环1之间都处于松弛状态，此时伸缩连接环1能够在球螺杆8底端的球形结构上进行一定角度的摆动，因此在伸缩连接环1的带动下，载物台5也能够在一定角度上进行摆动。在3D打印机开始工作时，3D打印机的驱动电机带动升降机构向下运动，在载物台5向下运动过程中逐渐靠近位于正下方的树脂池，直至载物台5底端与树脂表面接触并产生一定压力，在压力的作用下载物台5的倾斜角度会发生偏移，从而使载物台5的底端与树脂表面充分接触。当载物台5的底端与树脂表面充分接触后，关闭驱动电机，依次拧紧第一锁紧螺钉11和旋钮21，使旋钮2、固定连接套6和伸缩连接环1之间处于压紧状态，此时由于旋钮2、固 定连接套6、伸缩连接杆10和载物台5之间都处于压紧状态，因此可对载物台5的倾斜角度进行固定，之后随着3D打印层数的增加，驱动电机实时带动3D打印机的升降机构向上调整位置，载物台5的底端始终压紧3D打印过程中最顶端的树脂层。
本发明激光3D打印机用万向载物台，能够根据树脂池表面对载物台5施加的压力，自动调整对载物台5的倾斜角度，保证载物台5底端与树脂表面紧密贴合，并通过拧紧第一锁紧螺钉11和旋钮2对载物台5在所偏移角度的基础上进行定位，使载物台5的底端在整个3D打印的过程中始终与树脂表面紧密贴合，避免占用大量人力和时间对载物台5进行调整。设置有第二锁紧螺钉，能够对第一锁紧螺钉11起到加固作用，保证防护套4和伸缩连接杆10之间位置的固定。在保证防护套4和伸缩连接杆10之间设置有止转销12，保证防护套4和伸缩连接杆10之间不发生转动，增强了万向载物台5的稳定性。可通过多种方式与3D打印机的升降机构连接，安装方便，便于调节。本发明结构简单、操控简便、提高了3D打印效果，与现有技术相比具有明显的优点。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述，并非对本发明的范围进行限定，在不脱离本发明设计精神的前提下，本领域普通技术人员对本发明的技术方案作出的各种变形和改进，均应落入本发明权利要求书确定的保护范围内。

Claims (5)

  1. 一种激光3D打印机用万向载物台，其特征在于：包括旋钮(2)、球螺杆(8)、伸缩连接环(1)、伸缩连接杆(10)和载物台(5)，球螺杆(8)顶端与旋钮(2)底端通过螺纹连接，旋钮(2)下方的球螺杆(8)外侧套设有弹簧(9)，弹簧(9)的外侧套设有固定连接套(6)，固定连接套(6)的边缘与载物台连接架(3)固定连接，球螺杆(8)底端设置有伸缩连接环(1)，伸缩连接环(1)底端设置有半球形第一凹槽，第一凹槽的中间位置开设有第一通孔，通过第一通孔将伸缩连接环(1)套设在球螺杆(8)上，球螺杆(8)底端的球形结构的外壁与第一凹槽的内壁配合接触，第一通孔的内侧边缘与球螺杆(8)的外壁之间预留有空隙，伸缩连接环(1)底端与伸缩连接杆(10)顶端连接，伸缩连接杆(10)底端与载物台(5)的顶端连接。
  2. 根据权利要求1所述的激光3D打印机用万向载物台，其特征在于：所述固定连接套(16)上方设置有顶板(20)，固定连接套(16)的顶端与顶板(20)的底端边缘之间通过螺钉固定连接，顶板(20)的中间位置开设有第九通孔，顶板(20)通过第九通孔套设在球螺杆(8)上。
  3. 根据权利要求1所述的激光3D打印机用万向载物台，其特征在于：所述伸缩连接杆(10)与载物台(5)之间设置有防护套(4)，防护套(4)中间位置开设有第二通孔，伸缩连接杆(10)下部伸入到第二通孔中，防护套(4)和伸缩连接杆(10)的外壁上分别开设有第三通孔和第四通孔，第三通孔和第四通孔的位置相对应，在第三通孔和第四通孔中设置有第一锁紧螺钉(11)，防护套(4)的外壁上还开设有第五通孔(13)，第五通孔(13)与第三通孔连通，第一锁紧螺钉(11)上开设有第六通孔，第六通孔和第五通孔(13)的位置相对应，在第五通孔(13)和第六通孔中设置有第二锁紧螺钉，伸缩连接杆(10)与防护套(4)之间连接有止转销(12)。
  4. 根据权利要求3所述的激光3D打印机用万向载物台，其特征在于：所述伸缩连接杆(10)顶端开设有阶梯形第七通孔，防护套(4)顶端的对应位置开设有第一盲孔(19)，止转销(12)设置在第七通孔和第一盲孔(19)中。
  5. 根据权利要求1所述的激光3D打印机用万向载物台，其特征在于：所述载物台(5)沿水平方向设置。
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