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CN205915333U - Three degrees of freedom of overconstraint self -balancing platform that connects in parallel - Google Patents

Three degrees of freedom of overconstraint self -balancing platform that connects in parallel Download PDF

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Publication number
CN205915333U
CN205915333U CN201620741466.1U CN201620741466U CN205915333U CN 205915333 U CN205915333 U CN 205915333U CN 201620741466 U CN201620741466 U CN 201620741466U CN 205915333 U CN205915333 U CN 205915333U
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CN
China
Prior art keywords
platform
linear actuator
coaxial
spring assist
auxiliary shaft
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Withdrawn - After Issue
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CN201620741466.1U
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Chinese (zh)
Inventor
赵铁石
胡强强
宋晓鑫
丁甲
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Yanshan University
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Yanshan University
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Priority to CN201620741466.1U priority Critical patent/CN205915333U/en
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Abstract

The utility model provides the parallelly connected motion platform of three degrees of freedom of overconstraint self -balancing, the correcting device comprises a pedestal, move the platform, one 5 pole closed loop motion chain and the identical drive branch of two -strip structure, wherein 5 pole closed loops motion chain is by sharp actuator, two coaxial first revolute pairs, the triangle frame, the second revolute pair, public axle, third revolute pair and spring helping hand remove vice the constitution, article two, drive branch is by sharp actuator, an universal hinge, connecting rod and ball pivot are constituteed, it is connected through two the coaxial fourth revolute pairs and the public axle both ends of 5 pole closed loops motion chain to move the platform, the spring helping hand removes vice vertical the installation at the base center. The utility model discloses have fixed decoupling zero pivot, big around the torsional rigidity of base central line, bearing capacity is strong.

Description

A kind of Planar Mechanisms self-balancing freedom degree parallel connection platform
Technical field
The present invention relates to a kind of parallel institution, particularly a kind of parallel motion platform.
Background technology
Parallel institution was more and more applied to every field in the last few years, and it has compact conformation, rigidity is big, carry The advantages of ability is by force and position and attitude error is not accumulated.Especially Limited-DOF Parallel Robot, it has frame for movement simply, manufactures The advantages of with controlling advantage of lower cost.Existing typical two turn one is moved parallel robot and there is structure Coupling and torsional rigidity not High the shortcomings of.
Chinese patent cn 201410160309.7 proposes a kind of Three Degree Of Freedom centre of sphere Adjustable Spherical parallel institution, this Ming Zhong branch to connect upper lower platform using three symmetrical identical center spherical pairs driving side chain to add adjustable height, But its torsional rigidity is limited, and bearing capacity is not high.
Chinese patent cn 201210530365.6 proposes the freedom degree parallel connection mould with plane double leval jib closed-loop structure Intend platform, it includes moving platform, fixed platform and four branches connecting this two platforms, be wherein distributed in tying for three of surrounding Structure is identicalDrive branch, another is to carry bound branch in the middle of ps.Its weak point is: mechanism deposits In coupling, do not have spring assembly limited to balance upper mounting plate weight, torsional rigidity.
Chinese patent cn 200510052261.9 proposes a kind of adjustable has passive bound branch freedom degree parallel connection Robot mechanism, in this invention, branch adopts three symmetrical identical sps branches, and is put down up and down with up branch connection Platform, and the constraint pose of passive bound branch is adjustable.But the decoupling rotating shaft that this mechanism is not fixed, and do not enable flat The self-balancing of platform, torsional rigidity is limited.
Chinese patent cn 201520357669.6 proposes a kind of symmetrical three freedom redundancy and drives parallel antenna structure System, its mechanism uses three uniform rsr side chains and is connected to the sp bound branch of upper and lower Platform center, but its presence The torsional rigidity of mechanism is low, does not have the decoupling rotating shaft of fixation, the shortcomings of torsional rigidity is limited.
Chinese patent cn 201410468846.8 proposes a kind of Planar Mechanisms three with equivalent tricept mechanism kinematic Freedom degree parallel connection mechanism, in this invention, branch uses uniform 2-ups/upr plus the up connecting upper and lower Platform center about Bundle branch.But the decoupling rotating shaft that this mechanism is not fixed, and do not enable the self-balancing of upper mounting plate, torsional rigidity is limited.
Content of the invention
It is an object of the invention to provide a kind of have the mistake that fixation decouples rotating shaft, torsional rigidity is high and bearing capacity is strong about Bundle self-balancing freedom degree parallel connection platform.
Technical scheme is as follows:
The present invention includes pedestal, moving platform, 5 bar closed loop moving chains and two-strip structure identical driving branch. The present invention is using two kinds of arrangements:
The first arrangement: described pedestal is to be all provided with 3 inclined-plane support blocks on six rib platforms, this 3 inclined-planes support The platform that the upper end of block is all provided with central through hole with one is connected;5 bar closed loop moving chains by linear actuator, two coaxial One rotates pair, triangle frame, the second rotation pair, common axis, the 3rd rotation is secondary and spring assist moving sets form, its cathetus start Device is fixed in the inclined-plane support block of pedestal, and two the first coaxial rotation pairs and straight line start are passed through in the following two ends of triangle frame The slide block of device connects, and the upper end of triangle frame is passed through the second rotation pair and is connected with one end of common axis, and the two ends of described common axis are divided Tong Guo two the 4th coaxial rotation pairs not be connected with moving platform, the spring assist being placed in the Platform center through hole of pedestal moves Sub-shell upper end is connected with this platform, and the lever upper end of spring assist moving sets is passed through the 3rd and rotated the secondary other end with common axis Connect;Two the first turns auxiliary shaft lines coaxially, the second turns auxiliary shaft line and the 3rd turns auxiliary shaft line are all parallel to each other, and straight line is made Dynamic device and spring assist moving sets centrage are coplanar and perpendicular to first, second, third turns auxiliary shaft line, spring assist moving sets Centrage and base central line are conllinear, two coaxial 4th turns auxiliary shaft lines parallel with moving platform plane and with first, second, the Three turns auxiliary shaft lines are vertical;Described two drive branch to be formed by linear actuator, the first universal hinge, connecting rod and ball pivot, its Cathetus actuator is separately fixed in the inclined-plane support block of two other pedestal, and the slide block of linear actuator is universal by first Hinge is connected with one end of connecting rod, and the other end of this connecting rod is connected with moving platform by ball pivot.
Described second rotates pair can be substituted by the second universal hinge with one of them the 4th rotation pair, and the 3rd rotation is secondary and another Individual 4th rotates pair can be substituted by the 3rd universal hinge.One of rotating shaft of second, third universal hinge described is coaxial, and with public Axle is coaxial, and another shaft axis of second, third universal hinge are parallel to each other and parallel to the first turns auxiliary shaft line.
Described spring assist moving sets are provided with linear position detection sensor, the 3rd turn of spring assist moving sets upper end Dynamic auxiliary spindle and the 4th rotates secondary rotating shaft and is provided with angle detecting sensor.
Second arrangement: described pedestal is six rib platforms, 5 bar closed loop moving chains are by two the first coaxial rotations Pair, triangle frame, linear actuator, the second rotation pair, common axis, the 3rd rotation pair and spring assist moving sets composition, wherein directly The lower end of line actuator shell is passed through support column and triangle frame lower frame center and is connected, the upper end of this linear actuator shell and triangle The upper end of frame is connected, and the following two ends of this triangle frame are passed through two the first coaxial rotation pairs and are connected with pedestal, linear actuator The upper end of lever is passed through second and rotates pair to be connected with one end of common axis, the housing lower end of spring assist moving sets and base central It is connected, the lever upper end of spring assist moving sets is passed through the 3rd rotation pair and is connected with the other end of common axis, the two of this common axis End is passed through two the 4th coaxial rotation pairs respectively and is connected with moving platform;Two the first turns auxiliary shaft lines, the second turns auxiliary shaft lines All parallel to each other with the 3rd turns auxiliary shaft line, linear actuator and spring assist moving sets centrage coplanar and perpendicular to first, Second, third turns auxiliary shaft line, spring assist moving sets centrage is conllinear with base central line;Two the 4th turns auxiliary shaft lines with Moving platform plane is parallel and vertical with first, second, third turns auxiliary shaft line;Described two drive branch universal by first Hinge, linear actuator and ball pivot composition, wherein linear actuator one end are passed through the first universal hinge and are connected with pedestal, linear actuator The other end be connected with moving platform by ball pivot.
Described second rotates pair can be substituted by the second universal hinge with one of them the 4th rotation pair, and the 3rd rotation is secondary and another Individual 4th rotates pair can be substituted by the 3rd universal hinge;One of rotating shaft of second, third universal hinge described is coaxial, and with public Axle is coaxial, and another shaft axis of second, third universal hinge are parallel to each other and parallel to the first turns auxiliary shaft line.
Described spring assist moving sets are provided with linear position detection sensor, the 3rd turn of spring assist moving sets upper end Dynamic auxiliary spindle and the 4th rotates secondary rotating shaft and is provided with angle detecting sensor.
The present invention is had the advantage that compared with existing correlation technique
1st, there is fixing decoupling rotating shaft, this makes resolving pose easily it is easy to control.
2nd, the 5 bar closed loop moving chains that the present invention comprises are a kind of Planar Mechanisms structures, and the design of this structure is greatly Improve the torsional rigidity around vertical central rotating shaft direction for the mechanism.
3rd, the spring assist moving sets being located at upper and lower Platform center include a spring, and it effectively carries upper mounting plate A part of weight, it is achieved that the self-balancing of upper mounting plate, mitigates the load driving branch, significantly thus improve the carrying of moving platform Ability and dynamic property.
Brief description
Fig. 1 is the three-dimensional simplified schematic diagram of the embodiment of the present invention 1;
Fig. 2 is the spring assist moving sets sectional view of Fig. 1;
Fig. 3 is the three-dimensional simplified schematic diagram of the embodiment of the present invention 2;
Fig. 4 is the three-dimensional simplified schematic diagram of the embodiment of the present invention 3;
Fig. 5 is the spring assist moving sets sectional view of Fig. 1;
Fig. 6 is the three-dimensional simplified schematic diagram of the embodiment of the present invention 4.
In Fig. 1-3: 1-1. pedestal, 1-2. linear actuator, 1-3. first rotate pair, 1-4. triangle frame, second turn of 1-5. Dynamic pair, 1-6. common axis, 1-7. the 3rd rotate pair, 1-8. the 4th rotates pair, 1-9. spring assist moving sets, 1-10. the 10000th To hinge, 1-11. connecting rod, 1-12. ball pivot, 1-13. moving platform, the universal hinge of 1-14. second, the universal hinge 1-16. straight line of 1-15. the 3rd Position-detection sensor, 1-17. angle detecting sensor.
In Fig. 4-6: 2-1. pedestal, 2-2. first rotates pair, 2-3. triangle frame, 2-4. linear actuator, second turn of 2-5. Dynamic pair, 2-6. moving platform, 2-7. the 4th rotate secondary, 2-8. the 3rd rotation pair, 2-9. common axis, 2-10. spring assist moving sets, The universal hinge of 2-11. first, 2-12. ball pivot, the universal hinge of 2-13. second, the universal hinge of 2-14. the 3rd.
Specific embodiment
Embodiment 1
In Planar Mechanisms self-balancing freedom degree parallel connection motion platform schematic diagram shown in Fig. 1 and Fig. 2, pedestal 1-1 be 3 inclined-plane support blocks are all provided with six rib platforms, the platform that the upper end of this 3 inclined-plane support blocks is all provided with central through hole with is solid Even;Linear actuator 1-2 in 5 bar closed loop moving chains is fixed in the inclined-plane support block of pedestal, the following two ends of triangle frame 1-4 It is connected with the slide block of linear actuator by two the first coaxial rotation secondary 1-3, the upper end of triangle frame is passed through second and rotated pair 1-5 is connected with one end of common axis 1-6, and the two ends of described common axis are passed through two the 4th coaxial rotation secondary 1-8 respectively and moved Platform 1-13 connects, and the spring assist moving sets 1-9 housing upper end being placed in the Platform center through hole of pedestal and this platform are connected, The lever upper end of spring assist moving sets is connected with the other end of common axis by the 3rd rotation secondary 1-7;Coaxial two first Turns auxiliary shaft line, the second turns auxiliary shaft line and the 3rd turns auxiliary shaft line are all parallel to each other, and linear actuator and spring assist move Sub-center line is coplanar and perpendicular to first, second, third turns auxiliary shaft line, spring assist moving sets centrage and base central line Collinearly, two coaxial 4th turns auxiliary shaft lines are parallel with moving platform plane and vertical with first, second, third turns auxiliary shaft line; Two-strip structure identical drives the linear actuator in branch to be separately fixed in the inclined-plane support block of two other pedestal, straight line The slide block of actuator is connected with one end of connecting rod 1-11 by the first universal hinge 1-10, and the other end of this connecting rod passes through ball pivot 1-12 It is connected with moving platform.
Spring assist moving sets are provided with linear position detection sensor 1-16, the 3rd turn of spring assist moving sets upper end Dynamic auxiliary spindle and the 4th rotates secondary rotating shaft and is provided with angle detecting sensor 1-17.
Embodiment 2
As shown in figure 3, the second universal hinge 1-14 and moving platform are passed through in the upper end of the triangle frame 1-4 in 5 bar closed loop moving chains 1-13 connects, and the lever upper end of spring assist moving sets 1-9 is connected with moving platform by the 3rd universal hinge 1-15;Described second, One of rotating shaft of the 3rd universal hinge is coaxial, and this axis direction and arrangement position are identical with the common axis 1-6 of embodiment 1, the 2nd, the second rotation secondary 1-5 and the 3rd of another shaft axis direction of the 3rd universal hinge and arrangement position and embodiment 1 rotates pair The axis of 1-7 is identical;Other parts and annexation are same as Example 1.
Embodiment 3
As shown in Figure 4 and Figure 5, pedestal 2-1 is six rib platforms, under 5 bar closed loop moving chain cathetus actuator 2-4 shells End is connected with triangle frame 2-3 lower frame center by support column, and the upper end of this linear actuator shell is connected with the upper end of triangle frame, The following two ends of this triangle frame are passed through two the first coaxial rotation secondary 2-2 and are connected with pedestal, the upper end of linear actuator lever It is connected with one end of common axis 2-9 by the second rotation secondary 2-5, the housing lower end of spring assist moving sets 2-10 and base central It is connected, the lever upper end of spring assist moving sets is connected with the other end of common axis by the 3rd rotation secondary 2-8, this common axis Two ends are passed through two the 4th coaxial rotation secondary 2-7 respectively and are connected with moving platform 2-6;Two the first turns auxiliary shaft lines, second turn Dynamic secondary axis and the 3rd turns auxiliary shaft line are all parallel to each other, and linear actuator and spring assist moving sets centrage are coplanar and vertical In first, second, third turns auxiliary shaft line, spring assist moving sets centrage is conllinear with base central line;Two the 4th rotations Secondary axis is parallel with moving platform plane and vertical with first, second, third turns auxiliary shaft line;Two-strip structure identical drives branch In linear actuator one end be connected with pedestal by the first universal hinge 2-11, the other end of linear actuator passes through ball pivot 2-12 It is connected with moving platform.
Embodiment 4
As shown in fig. 6, the upper end of the linear actuator lever in 5 bar closed loop moving chains is passed through the second universal hinge 2-13 and is moved Platform 2-6 connects, and the lever upper end of spring assist moving sets 2-10 is connected with moving platform by the 3rd universal hinge 2-14;Described 2nd, the 3rd one of rotating shaft of universal hinge is coaxial, and this axis direction and arrangement position are identical with the common axis 2-9 of embodiment 3, the 2nd, the second rotation secondary 2-5 and the 3rd of another shaft axis direction of the 3rd universal hinge and arrangement position and embodiment 3 rotates pair 2-8 axis is identical;Other parts and annexation are same as Example 3.

Claims (4)

1. a kind of Planar Mechanisms self-balancing freedom degree parallel connection platform, it include pedestal, moving platform, 5 bar closed loop moving chains and Two-strip structure is identical drive branch it is characterised in that: described pedestal is to be all provided with 3 inclined-planes on six rib platforms to support Block, the platform that the upper end of this 3 inclined-plane support blocks is all provided with central through hole with is connected;5 bar closed loop moving chains are made by straight line Dynamic device, two coaxial first rotation pair, triangle frame, second rotate pair, common axis, the 3rd rotation pair and spring assist moving sets Composition, wherein linear actuator is fixed in the inclined-plane support block of pedestal, and the following two ends of triangle frame pass through two coaxial the One rotates pair is connected with the slide block of linear actuator, and the upper end of triangle frame is passed through the second rotation pair and is connected with one end of common axis, The two ends of described common axis are passed through two the 4th coaxial rotation pairs respectively and are connected with moving platform, and the Platform center being placed in pedestal leads to The mobile sub-shell upper end of the spring assist of in the hole is connected with this platform, and the lever upper end of spring assist moving sets is passed through the 3rd and rotated Pair is connected with the other end of common axis;Two the first turns auxiliary shaft lines coaxially, the second turns auxiliary shaft line and the 3rd turns auxiliary shaft Line is all parallel to each other, and linear actuator and spring assist moving sets centrage are coplanar and secondary perpendicular to first, second, third rotation Axis, spring assist moving sets centrage and base central line are conllinear, two coaxial 4th turns auxiliary shaft lines and moving platform plane Parallel and vertical with first, second, third turns auxiliary shaft line;Described two drive branches by linear actuator, first universal Hinge, connecting rod and ball pivot composition, wherein linear actuator is separately fixed in the inclined-plane support block of two other pedestal, straight line start The slide block of device is passed through the first universal hinge and is connected with one end of connecting rod, and the other end of this connecting rod is connected with moving platform by ball pivot.
2. a kind of Planar Mechanisms self-balancing freedom degree parallel connection platform, it include pedestal, moving platform, 5 bar closed loop moving chains and Two-strip structure identical drive branch it is characterised in that: described pedestal be six rib platforms, 5 bar closed loop moving chains are by two Coaxial first rotates pair, triangle frame, linear actuator, the second rotation pair, common axis, the 3rd rotation is secondary and spring assist moves Secondary composition, the wherein lower end of linear actuator shell are passed through support column and are connected with triangle frame lower frame center, outside this linear actuator The upper end of shell is connected with the upper end of triangle frame, and two the first coaxial rotation pairs are passed through with pedestal even in the following two ends of this triangle frame Connect, the upper end of linear actuator lever is passed through the second rotation pair and is connected with one end of common axis, the housing of spring assist moving sets Lower end is connected with base central, and the lever upper end of spring assist moving sets is passed through the 3rd and rotated the secondary other end with common axis even Connect, the two ends of this common axis are passed through two the 4th coaxial rotation pairs respectively and are connected with moving platform;Two the first turns auxiliary shaft lines, Second turns auxiliary shaft line and the 3rd turns auxiliary shaft line are all parallel to each other, and linear actuator and spring assist moving sets centrage are coplanar And perpendicular to first, second, third turns auxiliary shaft line, spring assist moving sets centrage is conllinear with base central line;Two Four turns auxiliary shaft lines are parallel with moving platform plane and vertical with first, second, third turns auxiliary shaft line;Described two driving branches By the first universal hinge, linear actuator and ball pivot composition, the first universal hinge is passed through with pedestal even in wherein linear actuator one end Connect, the other end of linear actuator is connected with moving platform by ball pivot.
3. Planar Mechanisms self-balancing freedom degree parallel connection platform according to claim 1 and 2 it is characterised in that: described second Rotate secondary and one of them the 4th rotate secondary substituted by the second universal hinge, the 3rd rotate secondary and another the 4th rotate secondary by the 3rd Universal hinge substitutes;Described second and the 3rd any one rotating shaft in universal hinge is coaxial and coaxial with described common axis, second, Another shaft axis of 3rd universal hinge are parallel to each other and parallel to described first turns auxiliary shaft line.
4. Planar Mechanisms self-balancing freedom degree parallel connection platform according to claim 3 it is characterised in that: described spring assist Moving sets are provided with linear position detection sensor, and the 3rd rotation auxiliary spindle of spring assist moving sets upper end and the 4th rotates secondary Rotating shaft be provided with angle detecting sensor.
CN201620741466.1U 2016-07-14 2016-07-14 Three degrees of freedom of overconstraint self -balancing platform that connects in parallel Withdrawn - After Issue CN205915333U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106002956A (en) * 2016-07-14 2016-10-12 燕山大学 Over-constrained self-balancing three-degree-of-freedom parallel-connection platform
CN110270967A (en) * 2019-07-01 2019-09-24 烟台大学 A kind of offset-type rotation table device and working method
CN112754550A (en) * 2021-04-07 2021-05-07 北京数医脊微科技有限公司 Machine control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106002956A (en) * 2016-07-14 2016-10-12 燕山大学 Over-constrained self-balancing three-degree-of-freedom parallel-connection platform
CN106002956B (en) * 2016-07-14 2018-04-03 燕山大学 A kind of Planar Mechanisms self-balancing freedom degree parallel connection platform
CN110270967A (en) * 2019-07-01 2019-09-24 烟台大学 A kind of offset-type rotation table device and working method
CN110270967B (en) * 2019-07-01 2021-01-05 烟台大学 Compensation type rotary table device and working method
CN112754550A (en) * 2021-04-07 2021-05-07 北京数医脊微科技有限公司 Machine control system

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Granted publication date: 20170201

Effective date of abandoning: 20180403