CN116221256B - Single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit and regular five-pointed star-regular five-pointed prism conversion mechanism based on same - Google Patents
Single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit and regular five-pointed star-regular five-pointed prism conversion mechanism based on same Download PDFInfo
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- CN116221256B CN116221256B CN202310266329.1A CN202310266329A CN116221256B CN 116221256 B CN116221256 B CN 116221256B CN 202310266329 A CN202310266329 A CN 202310266329A CN 116221256 B CN116221256 B CN 116221256B
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 2
- 238000009776 industrial production Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C11/00—Pivots; Pivotal connections
- F16C11/04—Pivotal connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
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- Mechanical Light Control Or Optical Switches (AREA)
Abstract
The invention discloses a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same, and belongs to the technical field of mechanical application. The switching mechanism is driven by any one side link to realize continuous switching between a fully-unfolded planar regular five-pointed star configuration and a fully-closed regular five-pointed prism configuration, and the control is convenient and the movement is stable.
Description
Technical Field
The invention belongs to the technical field of mechanomotism application, and particularly relates to a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same.
Background
The space foldable mechanism has the property of being folded from a folded state to a preset configuration state, has the advantages of high rigidity, high reliability, high stability and the like, and has very wide application in the aerospace field. Along with development of scientific technology, multifunctional requirements are provided for the expandable mechanism, however, the folding and unfolding modes of the existing expandable mechanism are single, the volume of the expandable mechanism can be mostly scaled, and few mechanisms can be flexibly switched between a plane configuration and a space configuration, so that development and application of the expandable mechanism are limited. There is a need in the art for a new solution to this problem.
Disclosure of Invention
The invention aims to solve the technical problems that: the single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and the regular five-pointed star-regular five-pointed prism conversion mechanism based on the same are provided, the conversion mechanism is driven by the side link to realize continuous conversion between a completely expanded planar regular five-pointed star configuration and a completely closed spatial regular five-pointed prism configuration, and the mechanism is simple and convenient to control in the configuration conversion process.
The technical scheme adopted by the invention is a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same, and is characterized in that: the device comprises a frame, a side link, a connecting rod, an I-type offset connecting rod and an II-type offset connecting rod, wherein one end of the side link is provided with two parallel revolute pairs I and II; the I-type offset connecting rod and the II-type offset connecting rod are respectively provided with an offset revolute pair;
the frame is provided with five branch rods, and the included angle between two adjacent branch rods is 72 degrees and is respectively hinged with the side link;
The two side links are arranged and comprise a side link I and a side link II, wherein one end of the side link I is hinged with the rack branch rod, a revolute pair II of the side link I is hinged with the connecting rod, and the axes of the two revolute pairs are mutually perpendicular; one end of a side link II is hinged with a rack branch rod, a revolute pair I of the side link II is hinged with a connecting rod, and the axes of the two revolute pairs are mutually perpendicular;
The two connecting rods are arranged, the axes of revolute pairs at two ends of the connecting rods are mutually perpendicular, one end of each connecting rod is hinged with a revolute pair II of a side link I or a revolute pair I of the side link II, and the other end of each connecting rod is hinged with an I-type offset connecting rod or an II-type offset connecting rod;
the I-type offset connecting rod is provided with one, the axes of the revolute pairs at the two ends of the connecting rod are mutually perpendicular, one end of the I-type offset connecting rod is hinged with the connecting rod, and the offset revolute pair at the other end of the I-type offset connecting rod is hinged with the offset revolute pair of the II-type offset connecting rod;
the II-type offset connecting rod is provided with one, the axes of the revolute pairs at the two ends of the connecting rod are mutually perpendicular, one end of the II-type offset connecting rod is hinged with the connecting rod, and the offset revolute pair at the other end of the II-type offset connecting rod is hinged with the offset revolute pair of the I-type offset connecting rod;
The two adjacent frame branch rods are in mirror symmetry with respect to a symmetrical plane A passing through the angular bisectors of the included angles of the axes of the two frame branch rods; the two side frames are in mirror symmetry about a symmetry plane A; the two connecting rods are in mirror symmetry about a symmetry plane A; the I-type offset connecting rod and the II-type offset connecting rod are in mirror symmetry about a symmetry plane A;
the symmetry plane A is perpendicular to the plane B where the rack is positioned;
the adjacent frame branch rods, the two side link rods, the two connecting rods, the I-type offset connecting rod and the II-type offset connecting rod form a single closed loop;
the axes of the frame branch rod, the side link rod, the connecting rod, the I-type offset connecting rod and the II-type offset connecting rod revolute pair are all positioned on a frame plane B in a fully-unfolded plane configuration state of the single-degree-of-freedom symmetrical seven-rod closed loop extensible unit;
The invention adopts another technical scheme that a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same are characterized in that: the device comprises a frame, a side link, a connecting rod, an I-type offset connecting rod, an II-type offset connecting rod, an I-type rubber cushion and an II-type rubber cushion, wherein one end of the side link is provided with two parallel revolute pairs I and II, and the I-type offset connecting rod and the II-type offset connecting rod are respectively provided with an offset revolute pair;
the regular five-pointed star-regular five-prism conversion mechanism comprises five groups of symmetrical seven-rod closed-loop extensible units with single degree of freedom;
The frame is provided with five branch rods, the included angle between two adjacent branch rods is 72 degrees, and each branch rod is hinged with the side link;
The side link is provided with five, wherein one end of the side link is hinged with a branch rod of the frame, the other end of the side link is provided with two parallel revolute pairs I and II which are both hinged with the connecting rod, the geometric centers of the revolute pairs are distributed on a circle, and the axes of the two revolute pairs are perpendicular to the axes of the other end of the connecting rod;
Ten connecting rods are arranged, the axes of revolute pairs at two ends of each connecting rod are mutually perpendicular, one end of each connecting rod is hinged with a connecting rod of a revolute pair I or a revolute pair II of the side link, the other end of each connecting rod is hinged with a type I offset connecting rod or a type II offset connecting rod, and the geometric centers of the revolute pairs are distributed on a circle;
The I-type offset connecting rods are provided with five, the axes of revolute pairs at two ends of the connecting rods are mutually perpendicular, one end of each of the I-type offset connecting rods is hinged with the connecting rod, the offset revolute pair at the other end of each of the I-type offset connecting rods is hinged with the offset revolute pair of the II-type offset connecting rod, and the geometric centers of the revolute pairs are distributed on a circle and are fixedly connected with the I-type rubber cushion;
The two ends of the II-type offset connecting rod are provided with five rotating pairs, the axes of the rotating pairs at the two ends of the connecting rod are mutually perpendicular, one end of the II-type offset connecting rod is hinged with the connecting rod, and the other end of the II-type offset connecting rod is hinged with the offset rotating pair of the I-type offset connecting rod and is fixedly connected with the II-type rubber cushion;
Five I-shaped rubber cushions are arranged and fixedly connected with the I-shaped offset connecting rods;
ten II-type rubber cushions are arranged and fixedly connected with II-type offset connecting rods;
The mechanism is composed of five single-degree-of-freedom symmetrical seven-rod closed-loop extensible units, the symmetrical relation of each unit is the same as that of the single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit, and the symmetrical relation is the same in the conversion process.
Through the design scheme, the invention has the following beneficial effects: the single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and the regular five-pointed star-regular five-pointed prism conversion mechanism based on the same are driven by the side link to realize continuous conversion of the conversion mechanism between a completely expanded planar regular five-pointed star configuration and a completely closed regular five-pointed prism configuration, and the mechanism has higher rigidity, is convenient to control in the conversion process and stable and continuous in movement.
The single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and the regular five-pointed star-regular five-pointed prism conversion mechanism based on the same have larger area and regular shape when being converted into a completely unfolded plane configuration, have stronger bearing capacity and wider space volume when being converted into a completely closed space configuration, and can be applied to working occasions of multi-form modes. The mechanism has wide application prospect in the fields of space exploration, large-scale construction, industrial production and the like.
Drawings
The invention is further described with reference to the drawings and detailed description which follow:
FIG. 1 is a schematic diagram of the overall structure of a single degree of freedom symmetrical seven-rod closed loop expandable unit of the present invention.
Fig. 2 is a schematic structural view of a single-degree-of-freedom symmetrical seven-rod closed loop expandable unit fully expanded into a planar configuration state.
Fig. 3 is a schematic diagram of a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a side link structure of a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same.
Fig. 4 is a schematic diagram of the overall structure of a single-degree-of-freedom symmetric seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same.
Fig. 5 is a schematic diagram of a single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same fully expanded into a planar five-pointed star configuration.
Fig. 6 is a schematic diagram of a single-degree-of-freedom symmetric seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same, which are completely closed into a regular five-pointed prism configuration.
In the figure, the geometric centers of the 1-frame, the 2-side link, the 3-connecting rod, the 4-I type offset connecting rod, the 5-II type offset connecting rod, the 6-I type rubber cushion, the 7-II type rubber cushion, the 101-frame branch rod, the A-symmetrical plane and the B-base plane are distributed in circles, and i=1, 2,3 and 4.
Detailed Description
The first embodiment is as follows: a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit, as shown in figures 1, 2 and 3, comprises a frame 1, a side link 2, a connecting rod 3, an I-type offset connecting rod 4 and an II-type offset connecting rod 5, wherein one end of the side link 2 is provided with two parallel revolute pairs I and II, and the I-type offset connecting rod 4 and the II-type offset connecting rod 5 are respectively provided with an offset revolute pair;
The frame 1 is provided with five branch rods 101, and the included angle between two adjacent branch rods is 72 degrees and is respectively hinged with the side link 2;
the two side links 2 are arranged and comprise a side link I201 and a side link II202, wherein one end of the side link I201 is hinged with the frame branch rod 101, a revolute pair II of the side link I201 is hinged with the connecting rod 3, and the axes of the two revolute pairs are mutually perpendicular; one end of a side link II202 is hinged with the frame branch rod 101, a revolute pair I of the side link II202 is hinged with a connecting rod 3, and the axes of the two revolute pairs are mutually perpendicular;
The two connecting rods 3 are arranged, the axes of revolute pairs at two ends of the connecting rods are mutually perpendicular, one end of each connecting rod is hinged with a revolute pair II of a side link I201 or a revolute pair I of a side link II202, and the other end of each connecting rod is hinged with an I-type offset connecting rod 4 or an II-type offset 5 connecting rod;
the I-type offset 4 connecting rod is provided with one, the axes of revolute pairs at two ends of the connecting rod are mutually perpendicular, one end of the I-type offset 4 connecting rod is hinged with the connecting rod 3, and the offset revolute pair at the other end of the I-type offset 4 connecting rod is hinged with the offset revolute pair of the II-type offset connecting rod 5;
the II-type offset connecting rod 5 is provided with one, the axes of the revolute pairs at two ends of the connecting rod are mutually perpendicular, one end of the II-type offset connecting rod is hinged with the connecting rod, and the offset revolute pair at the other end of the II-type offset connecting rod is hinged with the offset revolute pair of the I-type offset connecting rod 4;
the two adjacent frame branch rods 101 are in mirror symmetry about a symmetry plane A passing through the angular bisectors of the included angles of the axes of the two frame branch rods 101; the two side frames 2 are mirror symmetrical about a symmetry plane a; the two connecting rods 3 are mirror symmetrical about a symmetry plane a; the I-type offset connecting rod 4 and the II-type offset connecting rod 5 are in mirror symmetry about a symmetry plane A
The symmetry plane A is perpendicular to the plane B where the rack is positioned;
The adjacent frame branch rods 101, the two side link rods 2, the two connecting rods 3, the I-type offset connecting rod 4 and the II-type offset connecting rod 5 form a single closed loop;
the axes of the frame branch rod, the side link rod, the connecting rod, the I-type offset connecting rod and the II-type offset connecting rod revolute pair are all positioned on a frame plane B in a fully-unfolded plane configuration state of the single-degree-of-freedom symmetrical seven-rod closed loop extensible unit;
The second embodiment is as follows: a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit and a regular five-pointed star-regular five-pointed prism conversion mechanism based on the same are disclosed, as shown in fig. 4, 5 and 6, and comprise a frame 1, a side link 2, a connecting rod 3, an I-type offset connecting rod 4, an II-type offset connecting rod 5, an I-type rubber cushion 6 and an II-type rubber cushion 7, wherein one end of the side link 2 is provided with two parallel revolute pairs I and II, and the I-type offset connecting rod 4 and the II-type offset connecting rod 5 are respectively provided with an offset revolute pair;
the frame 1 is provided with five branch rods 101, the included angle between two adjacent branch rods is 72 degrees, each branch rod 101 is hinged with the side link 2, and the geometric center of the revolute pair is distributed on a circle C 1;
The side link 2 is provided with five parts, wherein one end of the side link 2 is hinged with the frame branch rod 101, the other end of the side link 2 is provided with two parallel revolute pairs I and II which are both hinged with the connecting rod 3, the geometric center of the revolute pair is distributed on a circle C 2, and the axes of the two revolute pairs are perpendicular to the axes of the other ends of the connecting rod;
Ten connecting rods 3 are arranged, the axes of revolute pairs at two ends of each connecting rod are mutually perpendicular, one end of each connecting rod is hinged with a revolute pair I or a revolute pair II connecting rod of the side link 2, the other end of each connecting rod is hinged with a type I offset connecting rod 4 or a type II offset connecting rod 5, and the geometric centers of the revolute pairs are distributed on a circle C 3;
The I-type offset connecting rods 4 are provided with five, the axes of revolute pairs at two ends of the connecting rods are mutually perpendicular, one end of each revolute pair is hinged with the connecting rod 3, the offset revolute pair at the other end of each revolute pair is hinged with the offset revolute pair of the II-type offset connecting rod 5, and the geometric centers of the revolute pairs are distributed on a circle C 4 and are fixedly connected with the I-type rubber cushion 6;
The two ends of the II-type offset connecting rods 5 are provided with five rotating pairs, the axes of the rotating pairs at the two ends of the connecting rods are mutually perpendicular, one end of each rotating pair is hinged with the connecting rod 3, and the other end of each offset rotating pair is hinged with the offset rotating pair of the I-type offset connecting rod 4 and fixedly connected with the II-type rubber cushion 7;
the I-shaped rubber cushion 6 is provided with five pieces and is fixedly connected with the I-shaped offset connecting rod 4;
Ten II-type rubber cushions 7 are arranged and fixedly connected with the II-type offset connecting rods 5;
The mechanism is composed of five single-degree-of-freedom symmetrical seven-rod closed-loop extensible units, the symmetrical relation of each unit is the same as that of the single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit, and the symmetrical relation is the same in the conversion process.
The single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and the regular five-pointed star-regular five-pointed prism conversion mechanism based on the same are driven by the side link to realize continuous conversion of the conversion mechanism between a completely expanded planar regular five-pointed star configuration and a completely closed regular five-pointed prism configuration, and the mechanism has higher rigidity, is convenient to control in the conversion process and moves stably.
The single-degree-of-freedom symmetrical seven-rod closed loop expandable unit and the regular five-pointed star-regular five-pointed prism conversion mechanism based on the same have larger area and regular shape when being converted into a completely unfolded plane configuration, have stronger bearing capacity and wider space volume when being converted into a completely closed space configuration, and can be applied to working occasions of multi-form modes. The mechanism has wide application prospect in the fields of space exploration, large-scale construction, industrial production and the like.
Claims (3)
1. A single-degree-of-freedom symmetrical seven-rod closed loop expandable unit is characterized in that: comprises a frame (1), a side link (2), a connecting rod (3), an I-type offset connecting rod (4) and an II-type offset connecting rod (5);
The frame (1) is provided with five branch rods (101), and the included angle between two adjacent branch rods is 72 degrees and is respectively hinged with the side link (2);
the two side links (2) are arranged, each side link comprises a side link I (201) and a side link II (202), one end of the side link (2) is provided with two parallel revolute pairs I and II, one end of the side link I (201) is hinged with the frame sub-support rod (101), the revolute pair II of the side link I (201) is hinged with the connecting rod (3), the axes of the two revolute pairs are mutually perpendicular, one end of the side link II (202) is hinged with the frame sub-support rod (101), the revolute pair I of the side link II (202) is hinged with the connecting rod (3), and the axes of the two revolute pairs are mutually perpendicular;
The two connecting rods (3) are arranged, the axes of revolute pairs at two ends of the connecting rods are mutually perpendicular, one end of each connecting rod is hinged with a revolute pair II of a side link I (201) or a revolute pair I of a side link II (202), and the other end of each connecting rod is hinged with an I-type offset connecting rod (4) or an II-type offset connecting rod (5);
The I-type offset connecting rod (4) is provided with one, the axes of revolute pairs at two ends of the connecting rod are mutually perpendicular, one end of the I-type offset connecting rod is hinged with the connecting rod (3), and the offset revolute pair at the other end of the I-type offset connecting rod is hinged with the offset revolute pair of the II-type offset connecting rod (5);
the II-type offset connecting rod (5) is provided with one, the axes of the revolute pairs at the two ends of the connecting rod are mutually perpendicular, one end of the II-type offset connecting rod is hinged with the connecting rod, and the offset revolute pair at the other end of the II-type offset connecting rod is hinged with the offset revolute pair of the I-type offset connecting rod (4);
Two adjacent frame branch rods (101) are in mirror symmetry about a symmetrical plane A passing through angular bisectors of included angles of axes of the two frame branch rods (101); the two side frames (2) are mirror symmetrical with respect to a symmetry plane A; the two connecting rods (3) are mirror symmetrical with respect to a symmetry plane A; the I-type offset connecting rod (4) and the II-type offset connecting rod (5) are in mirror symmetry with respect to a symmetry plane A; the symmetry plane A is perpendicular to the plane B where the rack is positioned;
The adjacent frame branch rods (101) and the two side link rods (2), the two connecting rods (3), the I-type offset connecting rod (4) and the II-type offset connecting rod (5) form a single closed loop;
In the state of the single-degree-of-freedom symmetrical seven-rod closed loop expandable unit in a fully expanded plane configuration, the axes of the frame branch rod, the side link rod, the connecting rod, the I-type offset connecting rod and the II-type offset connecting rod revolute pair are all positioned on a frame plane B.
2. A positive five-pointed star-positive five-pointed prism conversion mechanism of a single-degree-of-freedom symmetrical seven-rod closed loop extensible unit is characterized in that: comprises a frame (1), a side link (2), a connecting rod (3), an I-type offset connecting rod (4), an II-type offset connecting rod (5), an I-type rubber cushion (6) and an II-type rubber cushion (7);
Five branch rods (101) are arranged on the frame (1), the included angle between every two adjacent branch rods is 72 degrees, each branch rod (101) is hinged with the side link (2), and the geometric center of the revolute pair is distributed on the circle C 1;
Five side links (2) are arranged, one end of each side link (2) is hinged with a corresponding frame branch (101), two parallel revolute pairs I and II are arranged at the other end of each side link and are both hinged with a connecting rod (3), the geometric centers of the revolute pairs are distributed on a circle C 2, and the axes of the two revolute pairs are perpendicular to the axes of the other ends of the connecting rods;
Ten connecting rods (3) are arranged, the axes of revolute pairs at two ends of each connecting rod are mutually perpendicular, one end of each connecting rod is hinged with a revolute pair I or a revolute pair II connecting rod of the side link (2), the other end of each connecting rod is hinged with an I-type offset connecting rod (4) or a II-type offset connecting rod (5), and the geometric centers of the revolute pairs are distributed on a circle C 3;
The I-type offset connecting rod (4) is provided with five rotating pairs, the axes of the rotating pairs at two ends of the connecting rod are mutually perpendicular, one end of the I-type offset connecting rod is hinged with the connecting rod (3), the offset rotating pair at the other end of the I-type offset connecting rod is hinged with the offset rotating pair of the II-type offset connecting rod (5), and the geometric center of the rotating pair is distributed on a circle C 4 and is fixedly connected with the I-type rubber cushion (6);
the II-type offset connecting rod (5) is provided with five rotating pairs, the axes of the rotating pairs at two ends of the connecting rod are mutually perpendicular, one end of the II-type offset connecting rod is hinged with the connecting rod (3), and the other end of the II-type offset connecting rod is hinged with the offset rotating pair of the I-type offset connecting rod (4) and is fixedly connected with the II-type rubber cushion (7);
Ten I-shaped rubber cushions (6) are arranged and fixedly connected with the I-shaped offset connecting rods (4); the II-type rubber cushion (7) is provided with five parts, and is fixedly connected with the II-type offset connecting rod (5).
3. The single degree of freedom symmetrical seven-bar closed loop deployable cell positive five-pointed star-positive five-pointed prism conversion mechanism of claim 2, wherein: the mechanism is composed of five single-degree-of-freedom symmetrical seven-rod closed-loop extensible units, the symmetrical relation of each unit is the same as that of a single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit, and the symmetrical relation is the same in the conversion process.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266329.1A CN116221256B (en) | 2023-03-20 | 2023-03-20 | Single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit and regular five-pointed star-regular five-pointed prism conversion mechanism based on same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310266329.1A CN116221256B (en) | 2023-03-20 | 2023-03-20 | Single-degree-of-freedom symmetrical seven-rod closed-loop extensible unit and regular five-pointed star-regular five-pointed prism conversion mechanism based on same |
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| CN116221256B true CN116221256B (en) | 2024-06-11 |
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