WO2022122048A1 - Split-type five-degrees-of-freedom parallel mechanism - Google Patents

Split-type five-degrees-of-freedom parallel mechanism Download PDF

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WO2022122048A1
WO2022122048A1 PCT/CN2021/142598 CN2021142598W WO2022122048A1 WO 2022122048 A1 WO2022122048 A1 WO 2022122048A1 CN 2021142598 W CN2021142598 W CN 2021142598W WO 2022122048 A1 WO2022122048 A1 WO 2022122048A1
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platform
fixed
spherical hinge
split
support
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PCT/CN2021/142598
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French (fr)
Chinese (zh)
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吴孟丽
李明宇
林玉飞
李德祚
王旭浩
唐杰
张军
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中国民航大学
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Publication of WO2022122048A1 publication Critical patent/WO2022122048A1/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B25HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25JMANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
    • B25J9/00Programme-controlled manipulators
    • B25J9/003Programme-controlled manipulators having parallel kinematics
    • B25J9/0072Programme-controlled manipulators having parallel kinematics of the hybrid type, i.e. having different kinematics chains

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  • the invention belongs to the technical field of parallel mechanisms, in particular to a split-type five-degree-of-freedom parallel mechanism.
  • the parallel mechanism has been widely used in various fields in recent years. It has the advantages of high precision, stable operation and high work efficiency, so the parallel mechanism has high application value.
  • the five-degree-of-freedom parallel mechanism has also been widely used in recent years, because it has one less degree of freedom, so the structure is simpler, and at the same time has good stability, it can complete some processing processes that cannot be completed by the six-degree-of-freedom mechanism; such as China Patent Publication No. CN201821923752.5 discloses a novel five-degree-of-freedom parallel mechanism, which has a very simple mechanism and strong bearing capacity, but has a small working space and is easily interfered with in motion; the split structure can increase the mechanism space and reduce interference, so the use of split-type mechanism on the basis of the five-degree-of-freedom parallel mechanism has a good prospect.
  • the purpose of the present invention is to provide a split-type five-degree-of-freedom parallel mechanism.
  • the split-type five-degree-of-freedom parallel mechanism includes a fixed platform, a moving platform, a first branch, a second branch and a third branch;
  • the fixed platform includes a base fixed on the ground, two first guide rails, two first hinged supports, two first telescopic rods, a sub-platform and a third hinged support; the two first guide rails are symmetrical
  • the two first hinge supports are fixed on both ends of one side of the fixed platform, and the rotation axis is perpendicular to the upper surface of the base; Both ends are respectively fixed with a fourth hinged support, each fourth hinged support is respectively connected with one end of a first telescopic rod to form a first rotation pair, and the other end of the first telescopic rod is connected with a first hinged support
  • the second rotating pair is connected to form a second rotating pair, and the rotation axes of the first rotating pair and the second rotating pair are parallel to each other; the two first telescopic rods on the fixed platform are active pairs, which can realize the movement of the sub-platform relative to the fixed platform, so that the mechanism is divided into two parts. body structure;
  • the moving platform includes a platen, a second hinged support and two first spherical hinge supports; the second hinged support and the two first spherical hinged supports are fixed on the bottom surface of the platen in the shape of a zigzag, and the second The rotation axis of the hinged support is parallel to the center line of the two first spherical hinge supports;
  • the structure of the first branch chain and the second branch chain are completely identical and symmetrical, and both include a first connecting rod, a first sliding block, a first spherical hinge and a second spherical hinge; one end of the first connecting rod passes through the first ball
  • the hinge is connected with a first spherical hinge support fixed on the moving platform, and the other end is connected with the second spherical hinge support fixed on the first slider through the second spherical hinge, and the second spherical hinge support is fixedly connected
  • the first sliding block is mounted on the first guide rail in a way that can move up and down to form a first moving pair;
  • the third branch is the second connecting rod; one end of the second connecting rod is connected with the second hinged support on the moving platform to form the fourth rotating pair, and the other end is connected with the third hinged support on the fixed platform to form the fourth rotating pair.
  • the base adopts a rectangular plate-like structure.
  • the sub-platform adopts a triangular plate-like structure.
  • the fixed platform adopts a split structure, and there are three active pairs on the sub-platform, which ensures the motion characteristics of the moving platform, makes the driving system centralized, reduces the influence of the control system on the moving platform, makes the parallel mechanism modular, and reduces the batch maintenance of the mechanism. difficulty.
  • the mechanism is symmetrical as a whole and adopts multiple ball joints, which increases the flexibility and isotropy of the mechanism and increases the movement performance of the mechanism.
  • the split structure is adopted, which increases the working space of the moving platform.
  • FIG. 1 is a schematic structural diagram of a split-type five-degree-of-freedom parallel mechanism provided by the present invention.
  • FIG. 2 is a schematic structural diagram of a fixed platform in a split-type five-degree-of-freedom parallel mechanism provided by the present invention.
  • FIG. 3 is a schematic structural diagram of the intermediate moving platform of the split-type five-degree-of-freedom parallel mechanism provided by the present invention.
  • FIG. 4 is a schematic structural diagram of the first branch chain and the second branch chain in the split-type five-degree-of-freedom parallel mechanism provided by the present invention.
  • the split-type five-degree-of-freedom parallel mechanism includes a fixed platform 1, a moving platform 2, a first branch I, a second branch II and a third branch III;
  • the fixed platform 1 includes a base 101 fixed on the ground, two first guide rails 102, two first hinged supports 103, two first telescopic rods 4, a sub-platform 3 and a third hinged support 301;
  • the two first guide rails 102 are fixed on both ends of the upper surface of the fixed platform 1 in a symmetrical manner, and are perpendicular to the fixed platform 1;
  • the two first hinge supports 103 are fixed on both ends of one side of the fixed platform 1, and
  • the rotation axis is perpendicular to the upper surface of the base 101;
  • the two ends of the sub-platform 3 are respectively fixed with a fourth hinged support 302, and each fourth hinged support 302 is respectively connected with one end of a first telescopic rod 4 to form a first Rotating pair 5, the other end of the first telescopic rod 4 is connected with a first hinged support 103 to form a second rotating pair 6, and the rotation axes of the first rotating pair 5 and the second rotating pair 6 are parallel to each other;
  • the moving platform 2 includes a platen 201, a second hinged support 203 and two first spherical hinge supports 202; the second hinged support 203 and the two first spherical hinge supports 202 are fixed on the platen 201 in a shape of a and the rotation axis of the second hinge support 203 is parallel to the center line of the two first spherical hinge supports 202;
  • the structures of the first branch I and the second branch II are identical and symmetrical, and both include a first connecting rod 7, a first sliding block 10, a first spherical hinge 8 and a second spherical hinge 9; the first connecting rod One end of 7 is connected to a first spherical hinge support 202 fixed on the moving platform 2 through the first spherical hinge 8, and the other end is supported by the second spherical hinge 9 fixed on the first slider 10.
  • the seats 1001 are connected, and the second spherical hinge support 1001 is fixedly connected to the surface of the first sliding block 10;
  • the third branch III is the second connecting rod 12;
  • the hinge supports 301 are connected to form the third rotating pair 13 .
  • the base 101 adopts a rectangular plate-like structure.
  • the sub-platform 3 adopts a triangular plate-like structure.
  • the axis direction of the first guide rail 102 fixed on the base 101 is taken as the z-axis direction
  • the long side direction of the base 101 is taken as the y-axis direction
  • the short side direction of the base 101 is taken as the x-axis direction.
  • the split-type five-degree-of-freedom parallel mechanism selects two first moving pairs 11, two first telescopic rods 4 and a third rotating pair 13 as active pairs, and the two first telescopic rods 4 expand and contract in opposite directions, and cooperate with other
  • the active pair can realize the freedom of movement of the moving platform 2 along the y-axis;
  • the two first telescopic rods 4 can be extended and retracted in the same direction, and cooperate with the two first moving pairs 11 to realize the freedom of movement of the moving platform 2 along the x-axis;
  • the first moving pair 11 moves in the same direction along the two first guide rails 102, and cooperates with other active pairs to realize the freedom of movement of the moving platform 2 along the z-axis; 3.

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  • Engineering & Computer Science (AREA)
  • Robotics (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A split-type five-degrees-of-freedom parallel mechanism, comprising a fixed platform (1), a moving platform (2), a first branch chain (I), a second branch chain (II), and a third branch chain (III), and having three translational degrees of freedom and two rotational degrees of freedom. The fixed platform (1) comprises a base (101) fixed to the ground, two first guide rails (102), two first hinged supports (103), two first telescopic rods (4), a sub-platform (3), and a third hinged support (301). The fixed platform (1) is of a split structure, and three active pairs are arranged on the sub-platform (3).

Description

一种分体式五自由度并联机构A split-type five-degree-of-freedom parallel mechanism 技术领域technical field
本发明属于并联机构技术领域,特别是涉及一种分体式五自由度并联机构。The invention belongs to the technical field of parallel mechanisms, in particular to a split-type five-degree-of-freedom parallel mechanism.
背景技术Background technique
并联机构近些年在各个领域得到广泛的应用,它具有精度高、工作稳定、工作效率高等优点,所以并联机构具有很高的应用价值。The parallel mechanism has been widely used in various fields in recent years. It has the advantages of high precision, stable operation and high work efficiency, so the parallel mechanism has high application value.
五自由度并联机构近些年也被广泛应用,因其少一个自由度,因此结构更加简单,同时具有很好的稳定性,可以完成某些六自由度机构所不能完成的加工过程;如中国专利公开号CN201821923752.5中公开了一种新型的五自由度并联机构,具有很简单的机构以及很强的承载能力,但工作空间较小,运动很容易受到干涉;分体式结构可以增大机构的空间,减少干涉,所以在五自由度并联机构的基础上运用分体式的机构具有很好的前景。The five-degree-of-freedom parallel mechanism has also been widely used in recent years, because it has one less degree of freedom, so the structure is simpler, and at the same time has good stability, it can complete some processing processes that cannot be completed by the six-degree-of-freedom mechanism; such as China Patent Publication No. CN201821923752.5 discloses a novel five-degree-of-freedom parallel mechanism, which has a very simple mechanism and strong bearing capacity, but has a small working space and is easily interfered with in motion; the split structure can increase the mechanism space and reduce interference, so the use of split-type mechanism on the basis of the five-degree-of-freedom parallel mechanism has a good prospect.
发明内容SUMMARY OF THE INVENTION
为了解决上述问题,本发明的目的在于提供一种分体式五自由度并联机构。In order to solve the above problems, the purpose of the present invention is to provide a split-type five-degree-of-freedom parallel mechanism.
为了达到上述目的,本发明提供的分体式五自由度并联机构包括定平台、动平台、第一支链、第二支链和第三支链;In order to achieve the above object, the split-type five-degree-of-freedom parallel mechanism provided by the present invention includes a fixed platform, a moving platform, a first branch, a second branch and a third branch;
其中,定平台包括固定在地面上的底座、两个第一导轨、两个第一铰接支座、两个第一伸缩杆、分平台和一个第三铰接支座;两个第一导轨以对称的方式固定在定平台的上表面两端部位,并且垂直于定平台;两个第一铰接支座固定在定平台的一侧面两端部位,并且转动轴线垂直于底座的上表面;分平台的两端分别固定安装有一个第四铰接支座,每个第四铰接支座分别与一个第一伸缩杆一端相连而构成第一转动副,第一伸缩杆的另一端与一个第一铰接支座相 连而构成第二转动副,并且第一转动副与第二转动副的转动轴线相互平行;定平台上两个第一伸缩杆为主动副,能够实现分平台相对定平台移动,使机构呈分体式结构;The fixed platform includes a base fixed on the ground, two first guide rails, two first hinged supports, two first telescopic rods, a sub-platform and a third hinged support; the two first guide rails are symmetrical The two first hinge supports are fixed on both ends of one side of the fixed platform, and the rotation axis is perpendicular to the upper surface of the base; Both ends are respectively fixed with a fourth hinged support, each fourth hinged support is respectively connected with one end of a first telescopic rod to form a first rotation pair, and the other end of the first telescopic rod is connected with a first hinged support The second rotating pair is connected to form a second rotating pair, and the rotation axes of the first rotating pair and the second rotating pair are parallel to each other; the two first telescopic rods on the fixed platform are active pairs, which can realize the movement of the sub-platform relative to the fixed platform, so that the mechanism is divided into two parts. body structure;
动平台包括台板、一个第二铰接支座和两个第一球铰支座;第二铰接支座和两个第一球铰支座呈品字形固定在台板的底面上,并且第二铰接支座的转动轴线平行于两个第一球铰支座的中心连线;The moving platform includes a platen, a second hinged support and two first spherical hinge supports; the second hinged support and the two first spherical hinged supports are fixed on the bottom surface of the platen in the shape of a zigzag, and the second The rotation axis of the hinged support is parallel to the center line of the two first spherical hinge supports;
第一支链与第二支链的结构完全相同且对称设置,均包括第一连杆、第一滑块、第一球铰和第二球铰;其中第一连杆的一端通过第一球铰与固定在动平台上的一个第一球铰支座相连,另一端通过第二球铰与固定在第一滑块上的第二球铰支座相接,第二球铰支座固定连接在第一滑块的表面;第一滑块以能够上下移动的方式安装在第一导轨上而构成第一移动副;The structure of the first branch chain and the second branch chain are completely identical and symmetrical, and both include a first connecting rod, a first sliding block, a first spherical hinge and a second spherical hinge; one end of the first connecting rod passes through the first ball The hinge is connected with a first spherical hinge support fixed on the moving platform, and the other end is connected with the second spherical hinge support fixed on the first slider through the second spherical hinge, and the second spherical hinge support is fixedly connected On the surface of the first sliding block; the first sliding block is mounted on the first guide rail in a way that can move up and down to form a first moving pair;
第三支链为第二连杆;第二连杆的一端与动平台上的第二铰接支座相连而构成第四转动副,另一端与定平台上的第三铰接支座相连而构成第三转动副。The third branch is the second connecting rod; one end of the second connecting rod is connected with the second hinged support on the moving platform to form the fourth rotating pair, and the other end is connected with the third hinged support on the fixed platform to form the fourth rotating pair. Three rotation pairs.
所述的底座采用长方形板状结构。The base adopts a rectangular plate-like structure.
所述的分平台采用三角板状结构。The sub-platform adopts a triangular plate-like structure.
本发明提供的分体式五自由度并联机构具有以下优点:The split-type five-degree-of-freedom parallel mechanism provided by the present invention has the following advantages:
1、定平台采用分体式结构,分平台上设有三个主动副,保证了动平台运动特性,使驱动系统集中,可降低控制系统对动平台的影响,使并联机构模块化,降低机构批量维护难度。1. The fixed platform adopts a split structure, and there are three active pairs on the sub-platform, which ensures the motion characteristics of the moving platform, makes the driving system centralized, reduces the influence of the control system on the moving platform, makes the parallel mechanism modular, and reduces the batch maintenance of the mechanism. difficulty.
2、本机构整体对称,并且采用多个球铰,增加了机构灵活性与各项同性,增加了机构运动性能。2. The mechanism is symmetrical as a whole and adopts multiple ball joints, which increases the flexibility and isotropy of the mechanism and increases the movement performance of the mechanism.
3、采用分体式结构,增大了动平台的工作空间。3. The split structure is adopted, which increases the working space of the moving platform.
附图说明Description of drawings
图1为本发明提供的分体式五自由度并联机构结构示意图。FIG. 1 is a schematic structural diagram of a split-type five-degree-of-freedom parallel mechanism provided by the present invention.
图2为本发明提供的分体式五自由度并联机构中定平台结构示意图。FIG. 2 is a schematic structural diagram of a fixed platform in a split-type five-degree-of-freedom parallel mechanism provided by the present invention.
图3为本发明提供的分体式五自由度并联机构中动平台结构示意图。FIG. 3 is a schematic structural diagram of the intermediate moving platform of the split-type five-degree-of-freedom parallel mechanism provided by the present invention.
图4为本发明提供的分体式五自由度并联机构中第一支链和第二支链结构示意图。FIG. 4 is a schematic structural diagram of the first branch chain and the second branch chain in the split-type five-degree-of-freedom parallel mechanism provided by the present invention.
图中:1、定平台;101、底座;102、第一导轨;103、第一铰接支座;2、动平台;201、台板;202、第一球铰支座;203、第二铰接支座;3、分平台;301、第三铰接支座;302、第四铰接支座;4、第一伸缩杆;5、第一转动副;6、第二转动副;7、第一连杆;8、第一球铰;9、第二球铰;10、第一滑块;1001、第二球铰支座;11、第一移动副;12、第二连杆;13、第三转动副;14、第四转动副;Ⅰ、第一支链;Ⅱ、第二支链;Ⅲ、第三支链。In the figure: 1, fixed platform; 101, base; 102, first guide rail; 103, first hinged support; 2, movable platform; 201, platen; 202, first ball hinge support; 203, second hinge Support; 3. Sub-platform; 301, Third hinged support; 302, Fourth hinged support; 4. First telescopic rod; 5. First rotating pair; 6. Second rotating pair; 7. First connecting Rod; 8, the first ball joint; 9, the second ball joint; 10, the first slider; 1001, the second ball joint support; 11, the first moving pair; 12, the second link; 13, the third Rotating pair; 14. The fourth rotating pair; I, the first branch; II, the second branch; III, the third branch.
具体实施方式Detailed ways
下面结合附图对本发明提供的分体式五自由度并联机构进行详细说明。The split-type five-degree-of-freedom parallel mechanism provided by the present invention will be described in detail below with reference to the accompanying drawings.
如图1—图4所示,本发明提供的分体式五自由度并联机构包括定平台1、动平台2、第一支链Ⅰ、第二支链Ⅱ和第三支链Ⅲ;As shown in Figure 1-Figure 4, the split-type five-degree-of-freedom parallel mechanism provided by the present invention includes a fixed platform 1, a moving platform 2, a first branch I, a second branch II and a third branch III;
其中,定平台1包括固定在地面上的底座101、两个第一导轨102、两个第一铰接支座103、两个第一伸缩杆4、分平台3和一个第三铰接支座301;两个第一导轨102以对称的方式固定在定平台1的上表面两端部位,并且垂直于定平台1;两个第一铰接支座103固定在定平台1的一侧面两端部位,并且转动轴线垂直于底座101的上表面;分平台3的两端分别固定安装有一个第四铰接支座302,每个第四铰接支座302分别与一个第一伸缩杆4一端相连而构成第一转 动副5,第一伸缩杆4的另一端与一个第一铰接支座103相连而构成第二转动副6,并且第一转动副5与第二转动副6的转动轴线相互平行;定平台1上两个第一伸缩杆4为主动副,能够实现分平台3相对定平台1移动,使机构呈分体式结构;The fixed platform 1 includes a base 101 fixed on the ground, two first guide rails 102, two first hinged supports 103, two first telescopic rods 4, a sub-platform 3 and a third hinged support 301; The two first guide rails 102 are fixed on both ends of the upper surface of the fixed platform 1 in a symmetrical manner, and are perpendicular to the fixed platform 1; the two first hinge supports 103 are fixed on both ends of one side of the fixed platform 1, and The rotation axis is perpendicular to the upper surface of the base 101; the two ends of the sub-platform 3 are respectively fixed with a fourth hinged support 302, and each fourth hinged support 302 is respectively connected with one end of a first telescopic rod 4 to form a first Rotating pair 5, the other end of the first telescopic rod 4 is connected with a first hinged support 103 to form a second rotating pair 6, and the rotation axes of the first rotating pair 5 and the second rotating pair 6 are parallel to each other; the fixed platform 1 The upper two first telescopic rods 4 are active pairs, which can realize the movement of the sub-platform 3 relative to the fixed platform 1, so that the mechanism has a split structure;
动平台2包括台板201、一个第二铰接支座203和两个第一球铰支座202;第二铰接支座203和两个第一球铰支座202呈品字形固定在台板201的底面上,并且第二铰接支座203的转动轴线平行于两个第一球铰支座202的中心连线;The moving platform 2 includes a platen 201, a second hinged support 203 and two first spherical hinge supports 202; the second hinged support 203 and the two first spherical hinge supports 202 are fixed on the platen 201 in a shape of a and the rotation axis of the second hinge support 203 is parallel to the center line of the two first spherical hinge supports 202;
第一支链Ⅰ与第二支链Ⅱ的结构完全相同且对称设置,均包括第一连杆7、第一滑块10、第一球铰8和第二球铰9;其中第一连杆7的一端通过第一球铰8与固定在动平台2上的一个第一球铰支座202相连,另一端通过第二球铰9与固定在第一滑块10上的第二球铰支座1001相接,第二球铰支座1001固定连接在第一滑块10的表面;第一滑块10以能够上下移动的方式安装在第一导轨102上而构成第一移动副11;The structures of the first branch I and the second branch II are identical and symmetrical, and both include a first connecting rod 7, a first sliding block 10, a first spherical hinge 8 and a second spherical hinge 9; the first connecting rod One end of 7 is connected to a first spherical hinge support 202 fixed on the moving platform 2 through the first spherical hinge 8, and the other end is supported by the second spherical hinge 9 fixed on the first slider 10. The seats 1001 are connected, and the second spherical hinge support 1001 is fixedly connected to the surface of the first sliding block 10;
第三支链Ⅲ为第二连杆12;第二连杆12的一端与动平台2上的第二铰接支座203相连而构成第四转动副14,另一端与定平台1上的第三铰接支座301相连而构成第三转动副13。The third branch III is the second connecting rod 12; The hinge supports 301 are connected to form the third rotating pair 13 .
所述的底座101采用长方形板状结构。The base 101 adopts a rectangular plate-like structure.
所述的分平台3采用三角板状结构。The sub-platform 3 adopts a triangular plate-like structure.
现以固定在底座101上第一导轨102的轴线方向作为z轴方向,以底座101的长边方向作为y轴方向,以底座101的短边方向作为x轴方向,对本发明提供的分体式五自由度并联机构的工作原理阐述如下:Now, the axis direction of the first guide rail 102 fixed on the base 101 is taken as the z-axis direction, the long side direction of the base 101 is taken as the y-axis direction, and the short side direction of the base 101 is taken as the x-axis direction. The working principle of the parallel mechanism with degrees of freedom is described as follows:
本发明提供的分体式五自由度并联机构选取两个第一移动副11、两个第一 伸缩杆4与第三转动副13作为主动副,两个第一伸缩杆4异向伸缩,配合其他主动副,可实现动平台2沿y轴的移动自由度;两个第一伸缩杆4同向伸缩,配合两个第一移动副11,可实现动平台2沿x轴的移动自由度;两个第一移动副11沿两个第一导轨102同向运动,配合其他主动副,可实现动平台2沿z轴的移动自由度;两个第一伸缩杆4异向伸缩,可使分平台3绕z轴转动,由此使动平台2获得绕z轴的转动自由度;锁定两个第一移动副11,两个第一伸缩杆4与第三转动副13相配合,可使分平台3沿x轴移动,由此使动平台2获得绕y轴的转动自由度;最终,动平台2可实现三个方向的移动自由度与绕y、z轴的转动自由度共五个自由度。The split-type five-degree-of-freedom parallel mechanism provided by the present invention selects two first moving pairs 11, two first telescopic rods 4 and a third rotating pair 13 as active pairs, and the two first telescopic rods 4 expand and contract in opposite directions, and cooperate with other The active pair can realize the freedom of movement of the moving platform 2 along the y-axis; the two first telescopic rods 4 can be extended and retracted in the same direction, and cooperate with the two first moving pairs 11 to realize the freedom of movement of the moving platform 2 along the x-axis; The first moving pair 11 moves in the same direction along the two first guide rails 102, and cooperates with other active pairs to realize the freedom of movement of the moving platform 2 along the z-axis; 3. Rotate around the z-axis, thereby enabling the moving platform 2 to obtain the rotational freedom around the z-axis; lock the two first moving pairs 11, and the two first telescopic rods 4 cooperate with the third rotating pair 13, so that the sub-platform can be divided 3 Move along the x-axis, thereby enabling the moving platform 2 to obtain rotational degrees of freedom around the y-axis; finally, the moving platform 2 can achieve a total of five degrees of freedom of movement in three directions and rotational degrees of freedom around the y and z axes .

Claims (3)

  1. 一种分体式五自由度并联机构,其特征在于:所述并联机构包括定平台(1)、动平台(2)、第一支链(Ⅰ)、第二支链(Ⅱ)和第三支链(Ⅲ);A split-type five-degree-of-freedom parallel mechanism, characterized in that the parallel mechanism comprises a fixed platform (1), a moving platform (2), a first branch (I), a second branch (II) and a third branch chain (III);
    其中,定平台(1)包括固定在地面上的底座(101)、两个第一导轨(102)、两个第一铰接支座(103)、两个第一伸缩杆(4)、分平台(3)和一个第三铰接支座(301);两个第一导轨(102)以对称的方式固定在定平台(1)的上表面两端部位,并且垂直于定平台(1);两个第一铰接支座(103)固定在定平台(1)的一侧面两端部位,并且转动轴线垂直于底座(101)的上表面;分平台(3)的两端分别固定安装有一个第四铰接支座(302),每个第四铰接支座(302)分别与一个第一伸缩杆(4)一端相连而构成第一转动副(5),第一伸缩杆(4)的另一端与一个第一铰接支座(103)相连而构成第二转动副(6),并且第一转动副(5)与第二转动副(6)的转动轴线相互平行;定平台(1)上两个第一伸缩杆(4)为主动副,能够实现分平台(3)相对定平台(1)移动,使机构呈分体式结构;Wherein, the fixed platform (1) comprises a base (101) fixed on the ground, two first guide rails (102), two first hinge supports (103), two first telescopic rods (4), a sub-platform (3) and a third hinged support (301); two first guide rails (102) are fixed on both ends of the upper surface of the fixed platform (1) in a symmetrical manner, and are perpendicular to the fixed platform (1); two A first hinged support (103) is fixed on both ends of one side of the fixed platform (1), and the rotation axis is perpendicular to the upper surface of the base (101); two ends of the sub-platform (3) are respectively fixed with a first Four hinged supports (302), each fourth hinged support (302) is respectively connected with one end of a first telescopic rod (4) to form a first rotating pair (5), and the other end of the first telescopic rod (4) It is connected with a first hinged support (103) to form a second rotating pair (6), and the rotation axes of the first rotating pair (5) and the second rotating pair (6) are parallel to each other; The first telescopic rod (4) is an active pair, which can realize the movement of the sub-platform (3) relative to the fixed platform (1), so that the mechanism has a split structure;
    动平台(2)包括台板(201)、一个第二铰接支座(203)和两个第一球铰支座(202);第二铰接支座(203)和两个第一球铰支座(202)呈品字形固定在台板(201)的底面上,并且第二铰接支座(203)的转动轴线平行于两个第一球铰支座(202)的中心连线;The moving platform (2) includes a platen (201), a second hinged support (203) and two first spherical hinge supports (202); a second hinged support (203) and two first spherical hinge supports The seat (202) is fixed on the bottom surface of the platen (201) in the shape of a zigzag, and the rotation axis of the second hinge support (203) is parallel to the center line of the two first spherical hinge supports (202);
    第一支链(Ⅰ)与第二支链(Ⅱ)的结构完全相同且对称设置,均包括第一连杆(7)、第一滑块(10)、第一球铰(8)和第二球铰(9);其中第一连杆(7)的一端通过第一球铰(8)与固定在动平台(2)上的一个第一球铰支座(202)相连,另一端通过第二球铰(9)与固定在第一滑块(10)上的第二球铰支座(1001)相接,第二球铰支座(1001)固定连接在第一滑块(10)的表面;第一滑块(10) 以能够上下移动的方式安装在第一导轨(102)上而构成第一移动副(11);The structures of the first branch (I) and the second branch (II) are identical and symmetrical, and both include a first connecting rod (7), a first sliding block (10), a first spherical hinge (8) and a first Two spherical hinges (9); wherein one end of the first connecting rod (7) is connected with a first spherical hinge support (202) fixed on the moving platform (2) through the first spherical hinge (8), and the other end is connected by The second spherical hinge (9) is connected to the second spherical hinge support (1001) fixed on the first sliding block (10), and the second spherical hinge support (1001) is fixedly connected to the first sliding block (10) the surface; the first sliding block (10) is installed on the first guide rail (102) in a way that can move up and down to form a first moving pair (11);
    第三支链(Ⅲ)为第二连杆(12);第二连杆(12)的一端与动平台(2)上的第二铰接支座(203)相连而构成第四转动副(14),另一端与定平台(1)上的第三铰接支座(301)相连而构成第三转动副(13)。The third branch chain (III) is the second connecting rod (12); one end of the second connecting rod (12) is connected with the second hinge support (203) on the moving platform (2) to form a fourth rotating pair (14). ), and the other end is connected with the third hinged support (301) on the fixed platform (1) to form a third rotating pair (13).
  2. 根据权利要求1所述的分体式五自由度并联机构,其特征在于:所述的底座(101)采用长方形板状结构。The split-type five-degree-of-freedom parallel mechanism according to claim 1, wherein the base (101) adopts a rectangular plate-like structure.
  3. 根据权利要求1所述的分体式五自由度并联机构,其特征在于:所述的分平台(3)采用三角板状结构。The split-type five-degree-of-freedom parallel mechanism according to claim 1, characterized in that: the sub-platform (3) adopts a triangular plate-like structure.
PCT/CN2021/142598 2020-12-07 2021-12-29 Split-type five-degrees-of-freedom parallel mechanism WO2022122048A1 (en)

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