WO2018223363A1 - 一种三自由度解耦球面并联机构 - Google Patents
一种三自由度解耦球面并联机构 Download PDFInfo
- Publication number
- WO2018223363A1 WO2018223363A1 PCT/CN2017/087680 CN2017087680W WO2018223363A1 WO 2018223363 A1 WO2018223363 A1 WO 2018223363A1 CN 2017087680 W CN2017087680 W CN 2017087680W WO 2018223363 A1 WO2018223363 A1 WO 2018223363A1
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- WO
- WIPO (PCT)
- Prior art keywords
- curved
- connecting rod
- branch
- platform
- parallel mechanism
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/08—Programme-controlled manipulators characterised by modular constructions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/003—Programme-controlled manipulators having parallel kinematics
- B25J9/0045—Programme-controlled manipulators having parallel kinematics with kinematics chains having a rotary joint at the base
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J17/00—Joints
- B25J17/02—Wrist joints
- B25J17/0283—Three-dimensional joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J9/00—Programme-controlled manipulators
- B25J9/0009—Constructional details, e.g. manipulator supports, bases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J15/00—Gripping heads and other end effectors
- B25J15/0033—Gripping heads and other end effectors with gripping surfaces having special shapes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B9/00—Simulators for teaching or training purposes
- G09B9/02—Simulators for teaching or training purposes for teaching control of vehicles or other craft
- G09B9/08—Simulators for teaching or training purposes for teaching control of vehicles or other craft for teaching control of aircraft, e.g. Link trainer
- G09B9/12—Motion systems for aircraft simulators
Definitions
- the invention relates to the technical field of parallel mechanisms, in particular to a three-degree-of-freedom decoupling spherical parallel mechanism.
- the parallel robot Since the parallel robot was first proposed in 1938, it has been widely used in various fields of society because of its large rigidity, strong bearing capacity, small error, high precision, small self-weight load ratio, good dynamic performance and easy control.
- the spherical parallel mechanism belongs to a 3-rotation parallel mechanism, which can realize the arbitrary rotation of the spherical center of the spherical surface around the reference point of the moving platform.
- the mechanism moves, all the points on the moving platform of the mechanism are around the spherical center and fixed by one. The radius rotates.
- the advantage of spherical parallel connection with respect to the general parallel mechanism is that the working space is large, flexible and reliable, and it is not easy to interfere.
- a three-degree-of-freedom spherical parallel mechanism (CN101306534) with a central spherical hinge, which has a typical 3-RRR type mechanism, is proposed by Professor Yan and others of Yanshan University. Achieve three directions of rotation around the fixed center.
- a three-degree-of-freedom spherical parallel mechanism (CN104827463) with a curved moving pair proposed by Lin Rongfu and others of Shanghai Jiaotong University.
- the shape of the curved moving pair is used to realize the rotation of the moving platform at the midpoint of the arc in three directions.
- a three-degree-of-freedom decoupling spherical parallel mechanism includes a static platform, a rotating portion mounted on the static platform, a moving platform hinged with one end of the rotating portion, and a first fixed connection to a side of the rotating portion a curved branch and a second curved branch, a first arc that is received at one end in the inner cavity formed by the first curved branch and reciprocable along a tangential direction of the first curved branch a second curved connecting rod, wherein one end is received in an inner cavity formed by the second curved branch and reciprocable along a tangential direction of the second curved branch, the first The other end of the curved connecting rod and the other end of the second curved connecting rod are fixedly connected to the side edge of the moving platform, and the rotating portion can drive the moving platform to 360 in a direction perpendicular to the static platform.
- first curved link and the second curved link respectively reciprocate along a tangential direction of the first curved branch and the second curved branch to enable the movable platform to be wound around
- the axis of the plane in which the first arcuate branch or the second arcuate branch is located rotates.
- the rotating portion includes a first driving unit and a rotating unit
- the a driving unit includes a first driving motor fixed to the static platform and a first driving gear fixedly coupled to the first driving motor
- the rotating unit including a bracket fixed on the static platform and sleeved on a rotating member on the bracket, the rotating member is provided with a first tooth shape engaged with the first driving gear, and one end of the rotating member is hinged with the moving platform ball.
- the axes of the first drive motor and the bracket are parallel to one another.
- a restraining rod is disposed between the rotating member and the movable platform, one end of the restraining rod is fixedly coupled to the rotating member, and the other end is hinged to the moving platform by a ball joint.
- the first curved branch and the second curved branch form an angle of 90 degrees.
- a side of the first curved branch is mounted with a second driving unit
- the second driving unit includes a second driving motor fixed to a side of the first curved branch And a second driving gear fixedly coupled to the second driving motor, wherein the first curved connecting rod is provided with a second tooth shape that meshes with the second driving gear.
- a side of the second curved branch is mounted with a third driving unit
- the third driving unit includes a third driving motor fixed on a side of the second curved branch And a third driving gear fixedly coupled to the third driving motor, wherein the second curved connecting rod is provided with a third tooth shape that meshes with the third driving gear.
- a first connecting rod is disposed between the first curved connecting rod and the moving platform, and one end of the first connecting rod is opened through the end of the first curved connecting rod. The other end is fixedly connected to the side edge of the moving platform.
- a second connecting rod is disposed between the second curved connecting rod and the moving platform, and one end of the second connecting rod is opened through the end of the second curved connecting rod. The other end is fixedly connected to the side edge of the moving platform.
- the axes of the first connecting rod and the second connecting rod pass through the center of the ball joint.
- the three-degree-of-freedom decoupling spherical parallel mechanism comprises a static platform, a rotating portion mounted on the static platform, a moving platform hinged with one end of the rotating portion, and a fixed connection to the side of the rotating portion a first curved branch and a second curved branch, one end of which is received in an inner cavity formed by the first curved branch and reciprocable along a tangential direction of the first curved branch a curved connecting rod, a second curved connecting rod at one end of the inner cavity formed by the second curved branch and reciprocable along a tangential direction of the second curved branch,
- the other ends of the first curved connecting rod and the second curved connecting rod are fixedly connected to the side edge of the moving platform, and the three-degree-of-freedom decoupling spherical parallel mechanism, the rotating portion can drive the moving platform to rotate vertically
- the direction of the static platform is rotated 360 degrees, and the first curved link and the second curved link respectively reciprocate along a tangential direction
- FIG. 1 is a schematic structural view of a three-degree-of-freedom decoupling spherical parallel mechanism according to an embodiment of the present invention
- FIG. 2 is a schematic structural view of a three-degree-of-freedom decoupling spherical parallel mechanism according to another aspect of the present invention.
- a three-degree-of-freedom decoupling spherical parallel mechanism 100 includes: a static platform 110, a rotating portion 120, a moving platform 130, a first curved branch 140, and a second arc.
- the rotating portion 120 is mounted on the static platform 110.
- the moving platform 130 is hinged with one end of the rotating portion 120, and the first curved branch 140 and the second curved branch 150 are fixed.
- one end of the first curved link 160 is received in an inner cavity formed by the first curved branch 140 and the first curved link 160 is Reciprocating along a tangential direction of the first curved branch 140, one end of the second curved link 170 being received in an internal cavity formed by the second curved branch 150 and the second
- the curved connecting rod 170 is reciprocable along a tangential direction of the second curved branch 150, and the other end of the first curved connecting rod 160 and the other end of the second curved connecting rod 170 are fixedly connected.
- the present invention provides a three-degree-of-freedom decoupling spherical parallel mechanism 100, and the rotating portion 110 can drive the movable platform 130 to rotate 360 degrees in a direction perpendicular to the static platform 110, the first curved shape.
- the connecting rod 160 and the second curved connecting rod 170 reciprocate along the tangential direction of the first curved branch 140 and the second curved branch 150 respectively to enable the moving platform 130 to surround the first arc
- the axis of the plane in which the shaped branch 140 or the second curved branch 150 is located rotates.
- the static platform 110 may be a square plate. It can be understood that the structure of the static platform 110 is designed into a circular plate, a rectangular plate, and the like according to needs.
- the rotating portion 120 includes a first driving unit 121 and a rotating unit 122.
- the specific scheme is as follows:
- the first driving unit 121 includes a first driving motor 1211 fixed to the static platform 110 and a first driving gear 1212 fixedly coupled to the first driving motor 1211.
- the rotating unit 122 includes a bracket 1221 fixed to the static platform 110 and a rotating member 1222 sleeved on the bracket 1221.
- the rotating member 1222 is provided with the first driving tooth.
- the wheel 1212 engages with the first tooth shape 1223, and one end of the rotating member 1222 is ball-joined with the movable platform 130.
- the axes of the first driving motor 1211 and the bracket 1221 are parallel to each other.
- a restraining rod 180 is disposed between the rotating member 1222 and the movable platform 130.
- One end of the restraining rod 180 is fixedly connected to the rotating member 1222, and the other end is connected by a ball joint (not shown).
- the platform 130 is articulated.
- the first driving motor 1211 can drive the first driving gear 1212 to rotate, and the first driving gear 1212 drives the first tooth 1223 to rotate, so that the rotating member 1222 can be rotated.
- the axis of the bracket 122 rotates.
- the structure of the movable platform 130 is a circular plate. It can be understood that the structure of the movable platform 130 is designed into a structure such as a square plate or a rectangular plate as needed.
- the first curved branch 140 can be a curved tubular structure.
- the cross section of the cavity of the first curved branch 140 may be circular, elliptical or square.
- the cross section of the first curved link 160 may be a circular, elliptical or square structure that matches the cavity structure of the first curved branch 140.
- first curved link 160 is received in the inner cavity formed by the first curved branch 140 and the first curved link 160 can be along the first curved branch
- the tangential direction of the chain 140 is reciprocated to rotate the movable platform 130 about the axis of the plane in which the first curved branch 140 is located.
- the second curved branch 150 can be a curved tubular structure.
- the cross section of the cavity of the second curved branch 150 may be a circular, elliptical or square structure.
- the cross section of the second curved link 170 may be a circular, elliptical or square structure that matches the cavity structure of the second curved branch 150.
- one end of the second curved link 170 is received in the inner cavity formed by the second curved branch 150 and the second curved link 170 can be along the second curved branch
- the tangential direction of the chain 150 is reciprocated to rotate the movable platform 130 about the axis of the plane in which the second curved branch 150 is located.
- first curved branch 140 and the second curved branch 150 form an angle of 90 degrees.
- the side of the first curved branch 140 may further be mounted with a second driving unit 141, and the second driving unit 141 is fixed to the first curved branch.
- the first curved connecting rod 160 is provided with the second driving gear 143.
- the side of the second curved branch 150 may further be mounted with a third driving unit 151, and the third driving unit 151 is fixed to the second curved branch.
- the output end of the third driving motor 152 is coupled to the third driving gear 153 through a coupling, and the side of the second curved connecting rod 170 is opened with a side opening, so that the third driving The gear 153 is engageable with the third tooth of the third tooth 171.
- the rotation of the second driving gear 143 is driven by the second driving motor 142 on the first curved branch 140 to drive the first curved connecting rod 160 to be engaged with the second driving gear 143.
- the rotation of the second toothed 161 causes the first curved link 160 to reciprocate in a curved tangential direction within the cavity of the first curved branch 140 such that the movable platform 130 can be wound around the center of the ball joint and vertically Rotating with the axis of the plane in which the first curved branch 140 lies. (here for the second curved branch 150 and the second curved link 170 have similar motion states, which will not be described here)
- a first connecting rod L1 is disposed between the first curved connecting rod 160 and the moving platform 130, and one end of the first connecting rod L1 passes through the first A small hole is formed at an end of the curved connecting rod 160, and the other end is fixedly connected to a side edge of the moving platform 130.
- a second connecting rod L2 is disposed between the second curved connecting rod 170 and the moving platform 130, and one end of the second connecting rod 170 passes through the second A small hole is formed at an end of the curved connecting rod 170, and the other end is fixedly connected to a side edge of the moving platform 130.
- the axes of the first connecting rod L1 and the second connecting rod L2 pass through the center of the ball joint.
- the three-degree-of-freedom decoupling spherical parallel mechanism 100 is provided by the present invention.
- the rotating portion 110 can drive the movable platform 130 to rotate 360 degrees in a direction perpendicular to the static platform 110.
- the first curved connecting rod 160 And the second curved connecting rod 170 reciprocates along the tangential direction of the first curved branch 140 and the second curved branch 150 respectively to enable the movable platform 130 to surround the first curved branch 140 or the axis of the plane in which the second curved branch 150 is located, such that the three stages of the movable platform 130 can be rotated, driven by driving units that are independent of each other in three directions, so that the mechanism The three turning actions are decoupled.
- the three-degree-of-freedom decoupling spherical parallel mechanism 100 has the advantages of simple and reliable structure, strong driving capability, high flexibility, and stable movement of the movable platform 130, and can be applied to virtual axis machine tools, industrial robots, aviation simulation equipment, medical equipment and the like.
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- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
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Abstract
Description
Claims (10)
- 一种三自由度解耦球面并联机构,其特征在于,包括静平台、安装于所述静平台上的旋转部、与所述旋转部一端球铰的动平台、固定连接于所述旋转部侧边的第一弧形支链及第二弧形支链、一端收容于所述第一弧形支链形成的内部空腔中且可沿所述第一弧形支链的切线方向做往复运动的第一弧形连杆、一端收容于所述第二弧形支链形成的内部空腔中且可沿所述第二弧形支链的切线方向做往复运动的第二弧形连杆,所述第一弧形连杆的另一端及第二弧形连杆的另一端均固定连接于所述动平台的侧缘,所述旋转部可带动所述动平台绕垂直所述静平台所在的方向做360度旋转,所述第一弧形连杆及第二弧形连杆分别沿所述第一弧形支链及第二弧形支链的切线方向做往复运动以使所述动平台可绕所述第一弧形支链或所述第二弧形支链所在的平面的轴线转动。
- 如权利要求1所述的三自由度解耦球面并联机构,其特征在于,所述旋转部包括第一驱动单元及旋转单元,所述第一驱动单元包括固定于所述静平台上的第一驱动电机及与所述第一驱动电机固定连接的第一驱动齿轮,所述旋转单元包括固定于所述静平台上的支架及套设于所述支架上的旋转件,所述旋转件上开设有与所述第一驱动齿轮相啮合的第一齿状,所述旋转件的一端与所述动平台球铰。
- 如权利要求2所述的三自由度解耦球面并联机构,其特征在于,所述第一驱动电机与所述支架的轴线相互平行。
- 如权利要求3所述的三自由度解耦球面并联机构,其特征在于,所述旋转件与所述动平台之间设置有约束杆,所述约束杆的一端固定连接于所述旋转件,另一端通过球铰与所述动平台球铰。
- 如权利要求1所述的三自由度解耦球面并联机构,其特征在于,所述第一弧形支链及第二弧形支链形成的夹角呈90度。
- 如权利要求1所述的三自由度解耦球面并联机构,其特征在于,所述第一弧形支链的侧边安装有第二驱动单元,所述第二驱动单元包括固定于所述第一弧形支链侧边上的第二驱动电机以及与所述第二驱动电机固定连接的第二驱动齿轮,所述第一弧形连杆上开设有与所述第二驱动齿轮相啮合的第二齿状。
- 如权利要求1所述的三自由度解耦球面并联机构,其特征在于,所述第二弧形支链的侧边安装有第三驱动单元,所述第三驱动单元包括固定于所述第二弧形支链侧边上的第三驱动电机以及与所述第三驱动电机固定连接的第三驱动齿轮,所述第二弧形连杆上开设有与所述第三驱动齿轮相啮合的第三齿状。
- 如权利要求4所述的三自由度解耦球面并联机构,其特征在于,所述第一弧形连杆与所述动平台之间设置有第一连接杆,所述第一连接杆的一端穿过所述第一弧形连杆端部开设的小孔,另一端固定连接于所述动平台的侧缘。
- 如权利要求8所述的三自由度解耦球面并联机构,其特征在于,所述第二弧形连杆与所述动平台之间设置有第二连接杆,所述第二连接杆的一端穿过所述第二弧形连杆端部开设的小孔,另一端固定连接于所述动平台的侧缘。
- 如权利要求9所述的三自由度解耦球面并联机构,其特征在于,所述第一连接杆和所述第二连接杆的轴线经过所述球铰的中心。
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PCT/CN2017/087680 WO2018223363A1 (zh) | 2017-06-09 | 2017-06-09 | 一种三自由度解耦球面并联机构 |
US16/479,918 US11331791B2 (en) | 2017-06-09 | 2017-06-09 | 3 degree-of-freedoms decoupling spherical parallel mechanism |
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PCT/CN2017/087680 WO2018223363A1 (zh) | 2017-06-09 | 2017-06-09 | 一种三自由度解耦球面并联机构 |
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DE102016116677B3 (de) * | 2016-09-06 | 2017-12-14 | Universität Duisburg-Essen | Chirurgisches Simulationsgerät |
CN106346450B (zh) * | 2016-10-17 | 2018-11-09 | 中国科学院深圳先进技术研究院 | 三支链三自由度并联机构 |
US11458614B2 (en) * | 2017-06-09 | 2022-10-04 | Shenzhen Institutes Of Advanced Technology | 2 degree-of-freedoms decoupling parallel mechanism |
CN111168646B (zh) * | 2019-12-27 | 2023-04-07 | 兰州空间技术物理研究所 | 一种空间球面机构三自由度上的限位结构 |
CN111331580B (zh) * | 2020-03-17 | 2022-12-16 | 中国民航大学 | 一种动平台可翻转的六自由度并联机构 |
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CN114536352B (zh) * | 2020-11-27 | 2023-09-12 | 三赢科技(深圳)有限公司 | 机械定位结构及机械手组件 |
CN112720424B (zh) * | 2021-01-12 | 2022-03-25 | 山东理工大学 | 一种含平行四边形的双层三段导轨式平面机器人 |
CN113319817B (zh) * | 2021-02-06 | 2022-07-05 | 常州大学 | 全铰两约束支链的大转角零耦合度两平移一转动并联平台 |
CN113319816B (zh) * | 2021-02-06 | 2022-07-05 | 常州大学 | 全铰两约束支链的大转角一耦合度一平移两转动并联平台 |
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- 2017-06-09 US US16/479,918 patent/US11331791B2/en active Active
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CN104827463A (zh) * | 2015-05-07 | 2015-08-12 | 上海交通大学 | 具有弧形移动副的三自由度球面并联机构 |
CN104889976A (zh) * | 2015-05-28 | 2015-09-09 | 燕山大学 | 一种三转动解耦球面并联机器人机构 |
CN104985587A (zh) * | 2015-07-02 | 2015-10-21 | 上海交通大学 | 具有弧形移动副的四自由度转动移动完全解耦并联机构 |
CN105538296A (zh) * | 2016-02-03 | 2016-05-04 | 中北大学 | 一种可重构球面并联机器人 |
CN106426091A (zh) * | 2016-10-09 | 2017-02-22 | 邯郸学院 | 一种三自由度机器人 |
CN107160365A (zh) * | 2017-06-09 | 2017-09-15 | 深圳先进技术研究院 | 一种三自由度解耦球面并联机构 |
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