CN100563946C - Two freedom mobile parallel connection decoupling mechanism - Google Patents
Two freedom mobile parallel connection decoupling mechanism Download PDFInfo
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- CN100563946C CN100563946C CNB2007101718777A CN200710171877A CN100563946C CN 100563946 C CN100563946 C CN 100563946C CN B2007101718777 A CNB2007101718777 A CN B2007101718777A CN 200710171877 A CN200710171877 A CN 200710171877A CN 100563946 C CN100563946 C CN 100563946C
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- guide rail
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- drive unit
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- supports
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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
- B25J17/0258—Two-dimensional joints
- B25J17/0266—Two-dimensional joints comprising more than two actuating or connecting rods
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Abstract
A kind of two freedom mobile parallel connection decoupling mechanism, whole mechanism is fixed on the basic platform by guide rail, two Y are to guide rail, Y is fixed on the XOY basic platform to drive unit, Z is fixed on the YOZ basic platform to guide rail, Y is fixed on Y on guide rail to slide block, two fixing respectively corresponding Y of downside sliding support are on slide block, upside supports then and is connected with two downside sliding supports by the parallel-crank mechanism of being made up of 8 supporting rods and revolute pair, X is fixed on upside to guide rail and supports, X is fixed on Z on guide rail to drive unit, and X is connected to the housing and the upside support of drive unit, and then moving platform is fixed on X on guide rail.The present invention combines isosceles triangle two power bar truss structures, parallelogram sturcutre, make final two-degree of freedom translational parallel manipulator realize the decoupling zero of two-freedom, Stability Analysis of Structures, the rigidity height, mechanical characteristic is good, transmission efficiency is high, simultaneously simple in structure, control is easy, the kinematic accuracy height, and cost is low.
Description
Technical field
The present invention relates to the device in a kind of industrial robot field, specifically is a kind of two freedom mobile parallel connection decoupling mechanism that is applicable to two degrees of freedom operation occasion.
Background technology
Parallel institution is meant that two or more driver elements are installed in parallel and the mechanism of common execution, is widely used in technical fields such as heavily loaded analog machine, robot, Digit Control Machine Tool, sensor and microoperation.Existing parallel robot adopts 3-6 free degree symmetrical structure mostly, generally adopts ball pivot, Hooke's hinge or moving sets to realize the spatial movement of the 3-6 free degree as kinematic pair, and working space generally do not have predominant direction, complex structure, and manufacturing cost is higher.For example common Stewart parallel institution, link with six branches between the upper mounting plate of this mechanism and the lower platform, each branch two ends is two ball pivots, and the centre is a moving sets, driver relatively moves the length that changes each bar by promoting moving sets, thereby the pose of control upper mounting plate changes.Yet in many instances, in automatic production line, plane heavy duty analog machine, end effector only need operation in the plane, therefore adopt the multiple degrees of freedom space parallel mechanism to seem again to there is no need or manufacturing cost too high.
Draw when supporting rod only bears, compressive load and when not bearing bending load, be referred to as two power bars this moment.Mechanism's rigidity height that two power bars are formed, mechanical characteristic is good, but in existing more lower-mobility parallel institution, supporting rod is except that being subjected to the tension and compression effect, also bear the moment of flexure effect, thereby not only can produce tension and compression deformation during this class mechanism stand under load, but also can produce flexural deformation.Because the deterioration of stress, cause that this type of mechanism's rigidity is low, resistance to shock is relatively poor.In addition, because the motion between each driver element of parallel institution is coupled, be that the whole output stage of parallel institution all is that moving of all driver elements is synthetic along moving of either direction, and between the motion of each driver element and the parallel institution mass motion (i.e. input and output) is non-linear relation, therefore cause parallel institution control very complicated, demarcate difficulty, the raising of equipment precision and the decline of cost have also been restricted simultaneously, so, how to realize the parallel institution decoupling zero, to simplify parallel institution control and to demarcate, the precision that improves equipment moving also reduces cost, and is a difficulty and be imbued with challenging problem always.
Find through literature search prior art, existing most Two-Degree-of-Freedom mechanism, as " two-degrees-of-freedom translation parallel robot mechanism that only contains revolute pair " (referring to Chinese invention patent, publication number CN1355087), " two-degrees-of-freedom translation parallel robot mechanism " is (referring to Chinese invention patent, publication number CN2511447) etc., all do not consider mechanism's decoupling problem, do not meet in the actual use two-degree of freedom translational parallel manipulator rigidity height, mechanical characteristic is good and the requirement of decoupling zero.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of two freedom mobile parallel connection decoupling mechanism is provided, it can planar be moved freely, realized binary decoupling zero simultaneously, this Stability Analysis of Structures, rigidity height, mechanical characteristic is good, transmission efficiency is high, and simple in structure, and control easily, the kinematic accuracy height, cost is low.
The present invention is achieved by the following technical solutions, the present invention includes XOY basic platform, YOZ basic platform, X to guide rail, Y to guide rail, Z to guide rail, X to drive unit, Y to drive unit, Y to slide block, downside sliding support, revolute pair, supporting rod, upside support, moving platform.Two Y are fixed on the XOY basic platform to guide rail, Z is fixed on the YOZ basic platform to guide rail, Y is fixed on Y on guide rail to slide block, two downside sliding supports are parallel to each other, be X to layout, and be separately fixed at corresponding Y on slide block, upside supports then and is connected with each downside sliding support by the parallel-crank mechanism of being made up of 4 supporting rods and revolute pair respectively, X is fixed on upside to guide rail and supports, moving platform is fixed on X on guide rail, Y is fixed on the XOY basic platform to drive unit, and X is fixed on Z on guide rail to drive unit.
Described supporting rod is divided into two groups, and one group of 4 supporting rod is parallel to each other between every group of 4 supporting rods, and they and revolute pair combination form parallel-crank mechanism between any two, are used to connect the support of one of them downside sliding support and upside.
Described two bar group length are equal, and are two power bars, and to projection, the form with isosceles triangle between the supporting rod of two bar groups is formed, and forms the truss rod group from X.
Described revolute pair can be common components such as hinge, ball pivot or oscillating bearing.
Entire mechanism of the present invention have two cover drive unit: X to drive unit and Y to drive unit, can be by motor, hydraulic cylinder or air cylinder driven.Y is fixed on the XOY basic platform to drive unit, drive downside sliding support Y to moving, right latter two downside sliding support drives upside by 4 supporting rods and revolute pair respectively and supports mobile, upside support drive again moving platform realize Z to self-movement, X is fixed on Z on guide rail to drive unit, and X is connected to the housing and the upside support of drive unit, can make moving platform realize X to self-movement, and the parallelogram sturcutre that 8 supporting rods and revolute pair are formed has guaranteed that translation only takes place moving platform, and do not rotate, therefore whole mechanism realized X to, Z to decoupling zero.The transmission of whole device motion and power then realizes by moving platform (or adding end effector on moving platform in addition).
Each drive unit can adopt fluid pressure drive device among the present invention, also can adopt motor-driven or pneumatic actuating device.Owing to the existence of mechanism's deadweight, perhaps x is connected X to the disturbance of motion to the housing and the upside support of drive unit, makes whole mechanism increase stability in addition.
Compared with prior art, the present invention combines isosceles triangle two power bar truss structures, parallelogram sturcutre, make final two-degree of freedom translational parallel manipulator realize the decoupling zero of two-freedom, Stability Analysis of Structures, the rigidity height, mechanical characteristic is good, transmission efficiency is high, force transmission ratio can reach more than 5: 1, simultaneously simple in structure, control is easy, the kinematic accuracy height, two direction Motion Resolution rates can reach 0.01mm, and cost is low.
Description of drawings
Fig. 1 is a mechanism structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in Figure 1, present embodiment comprises with lower member: the 1-XOY basic platform, and 2-Y is to guide rail, 3-Z is to guide rail, the 4-YOZ basic platform, and 5-X is to drive unit, 6 moving platforms, 7-X is to guide rail, and the 8-upside supports, the 9-supporting rod, the 10-revolute pair, 11-downside sliding support, 12-Y is to slide block, and 13-Y is to drive unit.Two Y are fixed on the XOY basic platform 1 to guide rail 2, Z is fixed on the YOZ basic platform 4 to guide rail 3, Y is fixed on Y on guide rail 2 to slide block 12, two downside sliding supports 11 are parallel to each other, be X to layout, and fixing respectively corresponding Y is on slide block 12, upside supports 8 and then is connected with each downside sliding support 11 by 4 supporting rods 9 and revolute pair 10 respectively, X is fixed on upside to guide rail 7 and supports on 8, moving platform 6 is fixed on X on guide rail 7, and the transmission of whole device motion and power then adds end effector in addition by moving platform 6 or on moving platform 6 and realizes.Y is fixed on the XOY basic platform 1 to drive unit, and X is fixed on Z on guide rail 3 to drive unit 5.
In the present embodiment, described X to drive unit 5 and Y to drive unit 13, by Driven by Hydraulic Cylinder.
Described Y drives downside sliding support 11Y to moving to drive unit, and so latter two downside sliding support 11 drives upsides by 4 supporting rods 9 and revolute pair 10 respectively and supports 8 and move, upside support drive again moving platform 6 realize Z to self-movement.
Described X is fixed on Z on guide rail 3 to drive unit 5, and X is connected to the housing and the upside support 8 of drive unit 5, can make moving platform 6 realize X to self-movement, and the parallelogram sturcutre that 8 supporting rods 9 and revolute pair 10 are formed has guaranteed that translation takes place 6 of moving platforms, and do not rotate, therefore whole mechanism realized X to, Z to decoupling zero.
Whole mechanism is fixed on the corresponding basic platform by guide rail, and owing to the existence of mechanism's deadweight, perhaps x is connected X to the disturbance of motion to the housing and the upside support 8 of drive unit 5, makes whole mechanism increase stability in addition.
Embodiments of the present invention are not limited to above-mentioned form.Each drive unit can adopt fluid pressure drive device among the present invention, also can adopt motor-driven or pneumatic actuating device.The YOZ basic platform 1 of entire mechanism can be horizontal, also can the side formula install or the installation of tilting, and in concrete the application, can determine as required; As required, can also on each side of moving platform, increase end effector.
Claims (8)
1, a kind of two freedom mobile parallel connection decoupling mechanism, comprise the XOY basic platform, the YOZ basic platform, X is to guide rail, Y is to guide rail, Z is to guide rail, X is to drive unit, Y is to drive unit, Y is to slide block, the downside sliding support, revolute pair, supporting rod, upside supports, moving platform, it is characterized in that, two Y are fixed on the XOY basic platform to guide rail, Z is fixed on the YOZ basic platform to guide rail, Y is fixed on Y on guide rail to slide block, two downside sliding supports are parallel to each other, be X to layout, and be separately fixed at corresponding Y on slide block, upside supports then and is connected with each downside sliding support by the parallel-crank mechanism of being made up of 4 supporting rods and revolute pair respectively, X is fixed on upside to guide rail and supports, moving platform is fixed on X on guide rail, Y is fixed on the XOY basic platform to drive unit, and X is fixed on Z on guide rail to drive unit.
2, two freedom mobile parallel connection decoupling mechanism according to claim 1, it is characterized in that, described supporting rod is divided into two groups, one group of described 4 supporting rod, be parallel to each other between every group of 4 supporting rods, they and described revolute pair make up, form parallel-crank mechanism between any two, being used to connect one of them downside sliding support and upside supports, described supporting rod equal in length, and be two power bars, from X to projection, form with isosceles triangle between the supporting rod of two bar groups is formed, and forms the truss rod group.
3, two freedom mobile parallel connection decoupling mechanism according to claim 1, it is characterized in that, described Y drives downside sliding support Y to moving to drive unit, right latter two downside sliding support drives upside by described 4 supporting rods and revolute pair respectively and supports mobile, upside support drive again moving platform realize Z to self-movement, whole mechanism realized Z to decoupling zero.
4, two freedom mobile parallel connection decoupling mechanism according to claim 1 is characterized in that, described X supports to the housing of drive unit and upside and is connected, make moving platform realize X to self-movement, whole mechanism realizes that X is to decoupling zero.
5, two freedom mobile parallel connection decoupling mechanism according to claim 1 is characterized in that, described moving platform, and its each side is provided with end effector.
6, two freedom mobile parallel connection decoupling mechanism according to claim 1 is characterized in that, described revolute pair is hinge or oscillating bearing.
7, the described two freedom mobile parallel connection decoupling mechanism of claim 1 is characterized in that, described X to drive unit, is motor or hydraulic cylinder or cylinder driver to drive unit, Y.
8, the described two freedom mobile parallel connection decoupling mechanism of claim 1 is characterized in that, described YOZ basic platform, its mounting means are horizontal, side formula or inclination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101718777A CN100563946C (en) | 2007-12-06 | 2007-12-06 | Two freedom mobile parallel connection decoupling mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101718777A CN100563946C (en) | 2007-12-06 | 2007-12-06 | Two freedom mobile parallel connection decoupling mechanism |
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| CN101190527A CN101190527A (en) | 2008-06-04 |
| CN100563946C true CN100563946C (en) | 2009-12-02 |
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| CNB2007101718777A Expired - Fee Related CN100563946C (en) | 2007-12-06 | 2007-12-06 | Two freedom mobile parallel connection decoupling mechanism |
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Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101556932B (en) * | 2009-05-15 | 2010-10-27 | 东南大学 | Series/parallel connection two-coordinate precise motion locating platform |
| CN101804629B (en) * | 2010-04-17 | 2011-06-15 | 浙江理工大学 | Crossed two-freedom-degree parallel mechanism |
| CN102211252B (en) * | 2011-05-16 | 2016-03-30 | 江苏扬力数控机床有限公司 | A kind of mounting-type parallel numerical control laser cutting machine |
| CN102357881A (en) * | 2011-09-22 | 2012-02-22 | 广西大学 | Three-dimensional translation and one-dimensional rotation parallel mechanism containing 5R closed-loop sub-chains |
| CN102601787A (en) * | 2012-03-28 | 2012-07-25 | 广西大学 | Parallel mechanism capable of spatially three-dimensionally traversing and one-dimensionally circularly rotating |
| KR102160691B1 (en) | 2012-06-01 | 2020-09-29 | 인튜어티브 서지컬 오퍼레이션즈 인코포레이티드 | Surgical instrument manipulator aspects |
| CN103101050B (en) * | 2013-03-05 | 2015-06-10 | 清华大学 | Novel plane two-degree-of-freedom redundant drive parallel moving platform |
| CN103203740B (en) * | 2013-03-28 | 2015-08-05 | 燕山大学 | A kind of two-freedom movement decoupling parallel mechanism |
| CN103465256A (en) * | 2013-09-27 | 2013-12-25 | 苏州凯欧机械科技有限公司 | Novel large-stiffness space positioning robot |
| CN104608134B (en) * | 2015-02-07 | 2015-12-02 | 吉林大学 | Full decoupled plane two-freedom-degree parallel mechanism |
| KR101813526B1 (en) * | 2015-10-27 | 2017-12-29 | 주식회사 모션디바이스 | Motion simulator |
| KR20170062259A (en) * | 2015-11-27 | 2017-06-07 | 주식회사 모션디바이스 | Motion simulator with two degree of freedom angular motion |
| CN106960690B (en) * | 2016-08-08 | 2019-02-15 | 哈尔滨工业大学 | Cylindricity instrument horizontal guide rail driving device based on the clamping of circular arc hinge with multiple degrees of freedom decoupling |
| CN110355738B (en) * | 2018-04-10 | 2021-12-24 | 苏州迈澜医疗科技有限公司 | Multi-degree-of-freedom guide mechanism |
| CN111337422B (en) * | 2020-02-25 | 2022-08-19 | 重庆凯瑞汽车试验设备开发有限公司 | Friction abnormal sound testing device |
| CN112318549B (en) * | 2020-10-21 | 2022-05-13 | 天津大学 | Two-degree-of-freedom high-rigidity robot |
| CN113771011B (en) * | 2020-10-22 | 2023-05-30 | 桂林电子科技大学 | A end subassembly for robotic mechanism |
| CN112497200B (en) * | 2020-11-11 | 2022-05-13 | 天津大学 | Three-degree-of-freedom high-rigidity robot |
| CN112497211B (en) * | 2020-11-11 | 2022-05-13 | 天津大学 | Three-degree-of-freedom robot with high rigidity |
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- 2007-12-06 CN CNB2007101718777A patent/CN100563946C/en not_active Expired - Fee Related
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| CN101190527A (en) | 2008-06-04 |
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