CN110155373B - Device for eliminating radial clearance at joint of folding and unfolding mechanism - Google Patents
Device for eliminating radial clearance at joint of folding and unfolding mechanism Download PDFInfo
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- CN110155373B CN110155373B CN201910501549.1A CN201910501549A CN110155373B CN 110155373 B CN110155373 B CN 110155373B CN 201910501549 A CN201910501549 A CN 201910501549A CN 110155373 B CN110155373 B CN 110155373B
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- rotating shaft
- pin hole
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- 230000007246 mechanism Effects 0.000 title claims abstract description 35
- 238000003379 elimination reaction Methods 0.000 claims abstract description 5
- 230000008030 elimination Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000004044 response Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/222—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles for deploying structures between a stowed and deployed state
Abstract
A radial clearance eliminating device for a joint of a folding and unfolding mechanism belongs to the technical field of unfolding, connecting, locking and releasing of space mechanisms. The invention aims to solve the problem that the reliability and stability of the unfolding mechanism are affected by the radial gap between the base body and the unfolding piece after the existing pin is locked. The device for eliminating the radial gap at the joint of the folding and unfolding mechanism can ensure that the unfoldable part is smoothly unfolded, effectively eliminate the gap between the unfoldable part and the rotating shaft after the unfoldable part is locked, and avoid the influence of the gap on the rigidity and the fundamental frequency of the folding and unfolding mechanism, thereby influencing the anti-interference capability of the folding and unfolding mechanism. In addition, the transmission mode that the threaded section is connected is adopted between the rotating shaft and the unfolding piece, so that the mechanism has the characteristics of high joint strength, convenience in connection, reusability and standardization, and can realize stable and reliable clearance elimination through the matching of the mechanism. The device has the characteristics of simple structure, small volume and mass, high response speed and strong environment adaptability.
Description
Technical Field
The invention relates to a device for eliminating radial gaps at joints of folding and unfolding mechanisms, in particular to a device for eliminating gaps between an extensible part and a rotating shaft and between the side surface of the extensible part and the inner side surface of a base part, and belongs to the technical field of unfolding, connection locking and releasing of space mechanisms.
Background
The folding/unfolding mechanism of the space-expandable member is widely applied to various space folding/unfolding mechanisms due to the advantages of simple structure, small occupied space, convenience in storage and transportation and the like. Along with the development of aerospace technology, in order to guarantee the reliability of the space folding and unfolding mechanism, the unfolding part is required to smoothly reach the unfolding position and be smoothly locked in the unfolding process, and gaps between the unfolding part and the rotating shaft and between the side face of the unfolding part and the inner side face of the base part are required to be effectively eliminated, so that the influence on the rigidity and the fundamental frequency of the folding and unfolding mechanism is avoided, high-frequency vibration is generated between the unfolding part and the base part, and the anti-interference capability of the folding and unfolding mechanism is seriously influenced. Therefore, it is necessary to develop a gap eliminating device with simple structure, high reliability, small volume and weight, low energy consumption and strong environmental adaptability for the problem of pin locking of the folding and unfolding mechanism.
Disclosure of Invention
The invention provides a device for eliminating a radial gap at a connection part of a folding and unfolding mechanism, aiming at solving the problem that the reliability and stability of the folding and unfolding mechanism are affected by the radial gap between a base body and an unfolding piece after the existing pin is locked.
The technical scheme of the invention is as follows:
a device for eliminating radial clearance at the joint of a folding and unfolding mechanism comprises a first tight ring 1, a base body 2, an unfolding piece 3, a rotating shaft 4 and a second tight ring 5, wherein the base body 2 is provided with a groove, and two opposite inner walls in the groove are respectively provided with a first pin hole and a second pin hole;
the expansion piece 3 is provided with a boss, a third pin hole is formed in the boss, the boss is arranged in the groove of the base body 2, and the position of the third pin hole corresponds to the position of the first pin hole and the second pin hole;
the rotating shaft 4 is a truncated cone, the rotating shaft 4 sequentially passes through a first pin hole, a third pin hole and a second pin hole to enable the base body 2 to be in pin joint with the unfolding piece 3, the first tightening ring 1 is sleeved at the small-diameter end of the rotating shaft 4 and located in the first pin hole, the second tightening ring 5 is sleeved at the large-diameter end of the rotating shaft 4 and located in the second pin hole, and the first tightening ring 1 and the second tightening ring 5 jointly limit the freedom degree of the rotating shaft 4, so that the rotating shaft 4 and the base body 2 form an integral structure; the spreading member (3) moves along the axial direction of the rotating shaft (4).
Preferably: the middle part of the rotating shaft 4 is provided with a protruding external thread section, and an internal thread section matched with the external thread section is arranged in the third pin hole.
Preferably: the external thread arranged in the middle of the rotating shaft 4 and the internal thread arranged in the third pin hole are both single-end fine threads.
Preferably: the first pin hole and the second pin hole are both inner taper holes matched with the rotating shaft 4.
Preferably: the third pin hole and the inner taper hole matched with the rotating shaft 4 are equidistant, and a radial gap between the third pin hole and the rotating shaft 4 is also an equidistant gap.
Preferably: the ratio of the length of the internal thread arranged in the third pin hole to the length of the external thread of the rotating shaft (4) is 1.5: 1.
Preferably: the taper of the rotating shaft 4 is 5 degrees.
The invention has the following beneficial effects: the invention relates to a device for eliminating radial gaps at the joint of a folding and unfolding mechanism, which can effectively eliminate the gaps between an extensible part and a rotating shaft after the extensible part is locked and between the side surface of the extensible part and the inner side surface of a base part while ensuring the extensible part to be smoothly extended, and avoid the influence of the gap on the rigidity and the fundamental frequency of the folding and unfolding mechanism, thereby influencing the anti-jamming capability of the folding and unfolding mechanism; meanwhile, the radial clearance elimination process of the device and the expansion process of the expansion mechanism are synchronously carried out, an independent power supply is not needed for driving, and the device has the characteristics of simple structure, small volume and mass, low energy consumption, high response speed and strong environment adaptability. In addition, the transmission mode that the threaded section is connected is adopted between the rotating shaft and the unfolding piece, so that the mechanism has the characteristics of high joint strength, convenience in connection, reusability and standardization, and can realize stable and reliable clearance elimination through the matching of the mechanism. Meanwhile, the device for eliminating the radial clearance at the joint of the folding and unfolding mechanism can be used as a standard part, can be directly assembled in a pin locking device or a pin locking structure needing clearance elimination, and has the characteristics of convenience, rapidness and low manufacturing cost.
Drawings
FIG. 1 is a schematic illustration of the present invention prior to locking;
FIG. 2 is a schematic view of the present invention after locking and when the gap is eliminated;
in the figure 1-the first straining ring, 2-the base, 3-the spreading member, 4-the rotating shaft, 5-the second straining ring.
Detailed Description
The first embodiment is as follows:
the embodiments of the present invention are described with reference to the accompanying drawings 1 to 2: the invention relates to a device for eliminating radial gaps at joints of folding and unfolding mechanisms, which comprises a first tightening ring 1, a base body 2, an unfolding piece 3, a rotating shaft 4 and a second tightening ring 5, wherein the base body 2 is provided with a groove, and two opposite inner walls in the groove are respectively provided with a first pin hole and a second pin hole;
the expansion piece 3 is provided with a boss, a third pin hole is formed in the boss, the boss is arranged in the groove of the base body 2, and the position of the third pin hole corresponds to the position of the first pin hole and the second pin hole;
the first pin hole and the second pin hole are both inner taper holes matched with the rotating shaft 4;
the third pin hole is an inner taper hole matched with the rotating shaft 4, and a radial gap between the third pin hole and the rotating shaft 4 is an equidistant gap;
the rotating shaft 4 is a truncated cone, the rotating shaft 4 sequentially passes through a first pin hole, a third pin hole and a second pin hole to enable the base body 2 and the unfolding piece 3 to be in pin joint, the first tightening ring 1 is sleeved at the small-diameter end of the rotating shaft 4 and located in the first pin hole, the second tightening ring 5 is sleeved at the large-diameter end of the rotating shaft 4 and located in the second pin hole, the first tightening ring 1 and the second tightening ring 5 jointly limit the freedom degree of the rotating shaft 4, and the rotating shaft 4 and the base body 2 are enabled to be in an integrated structure;
the middle part of the rotating shaft 4 is provided with a protruding external thread section, and an internal thread section matched with the external thread section is arranged in the third pin hole. So set up, as shown in fig. 1, the pivot 4 be the truncated cone, the pivot 4 passes first pinhole, third pinhole and second pinhole in proper order and makes base member 2 and expansion piece 3 pin joint, and first tightring 1 suit is located first pinhole at the path end of pivot 4, second tightring 5 suit is located the second pinhole at the big diameter end of pivot 4, first tightring 1 and second tightring 5 restrict the degree of freedom of pivot 4 jointly, make pivot 4 and base member 2 become an organic whole structure, so pivot 4 can not rotate relative base member 2, also can not remove along the X direction. The middle part of the rotating shaft 4 is provided with a protruding external thread section, and the third pin hole is internally provided with an internal thread section matched with the external thread section, so that the unfolding part 3 moves along the X direction relative to the rotating shaft 4 in the process of rotating around the rotating shaft 4. When the unfolding member 3 in fig. 1 rotates from the folded state to the unfolded state relative to the base member 2, the internal thread on the unfolding member 3 is screwed in and slightly moves relative to the rotating shaft 4, so that the third pin hole of the unfolding member 3 is matched and installed with the rotating shaft 4, the radial gap between the unfolding member 3 and the rotating shaft 4 is eliminated, and the gap between the unfolding member 3 and the rotating shaft 4 in the X direction is reduced due to the matching of the internal thread section and the external thread section, as shown in fig. 2.
As shown in fig. 1 to 2, the present apparatus operates as follows: firstly, placing the boss of the unfolding part 3 in the groove of the base body 2, then inserting the rotating shaft 4 from the small-diameter end into the second pin hole of the base body 2, and rotating the rotating shaft 4 to complete threaded connection between the unfolding part 3 and the rotating shaft 4 when the external thread section of the rotating shaft 4 is contacted with the internal thread section of the unfolding part 3; then, the rotating shaft 4 is continuously rotated until the third pin hole of the unfolding piece 3 is matched with the rotating shaft 4 and has a certain pretightening force, then the first tightening ring 1 and the second tightening ring 5 are respectively sleeved on the small-diameter end and the large-diameter end of the rotating shaft 4 in an interference fit mode in sequence, and finally the unfolding piece 3 is folded to an initial folding state, as shown in fig. 1. When the unfolding part 3 needs to be unfolded, the unfolding part 3 rotates, the first fastening ring 1 and the second fastening ring 5 limit the degree of freedom of the rotating shaft 4 together, so that the rotating shaft 4 and the base body 2 are integrated, the unfolding part 3 rotates relative to the rotating shaft 4, the gap between the unfolding part 3 and the rotating shaft 4 in the X direction is reduced under the matching of the internal thread section and the external thread section, and the rotating shaft 4 is a truncated cone, and the third pin hole is an internal taper hole, so that when the unfolding part 3 moves from a small-diameter end to a large-diameter end relative to the rotating shaft 4, the third pin hole of the unfolding part 3 is matched with the rotating shaft 4, and the radial gap between the unfolding part 3 and the rotating shaft 4 is eliminated.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (6)
1. The utility model provides a take over elimination equipment of exhibition mechanism junction radial clearance which characterized in that: the clamp comprises a first tight ring (1), a base body (2), an unfolding piece (3), a rotating shaft (4) and a second tight ring (5), wherein the base body (2) is provided with a groove, and two inner walls opposite to each other in the groove are respectively provided with a first pin hole and a second pin hole;
the expansion piece (3) is provided with a boss, a third pin hole is formed in the boss, the boss is installed in the groove of the base body (2), and the hole position of the third pin hole corresponds to the hole position of the first pin hole and the hole position of the second pin hole;
the rotating shaft (4) is a truncated cone, the rotating shaft (4) sequentially penetrates through a first pin hole, a third pin hole and a second pin hole to enable the base body (2) to be in pin joint with the unfolding piece (3), the small-diameter end of the rotating shaft (4) is sleeved with the first tightening ring (1) and is located in the first pin hole, the large-diameter end of the rotating shaft (4) is sleeved with the second tightening ring (5) and is located in the second pin hole, the first tightening ring (1) and the second tightening ring (5) limit the freedom degree of the rotating shaft (4) together, and the rotating shaft (4) and the base body (2) are enabled to be of an integrated structure; the unfolding piece (3) moves along the axial direction of the rotating shaft (4);
the middle part of the rotating shaft (4) is provided with a protruding external thread section, and an internal thread section matched with the external thread section is arranged in the third pin hole.
2. The device for eliminating radial clearance at the joint of a folding and unfolding mechanism, according to claim 1, wherein: the external thread arranged in the middle of the rotating shaft (4) and the internal thread arranged in the third pin hole are single-end fine threads.
3. The device for eliminating radial clearance at the joint of a folding and unfolding mechanism, according to claim 1, wherein: the first pin hole and the second pin hole are both inner taper holes matched with the truncated cone of the rotating shaft (4).
4. The device for eliminating radial clearance at the joint of a folding and unfolding mechanism, according to claim 1, wherein: the third pinhole for with the truncated cone complex of pivot (4) interior taper hole to the radial gap between third pinhole and pivot (4) is the equidistance gap.
5. The device for eliminating radial clearance at the joint of a folding and unfolding mechanism, according to claim 1, wherein: the ratio of the length of the internal thread arranged in the third pin hole to the length of the external thread of the rotating shaft (4) is 1.5: 1.
6. The device for eliminating radial clearance at the joint of a folding and unfolding mechanism, according to claim 1, wherein: the taper of the rotating shaft (4) is 5 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501549.1A CN110155373B (en) | 2019-06-11 | 2019-06-11 | Device for eliminating radial clearance at joint of folding and unfolding mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910501549.1A CN110155373B (en) | 2019-06-11 | 2019-06-11 | Device for eliminating radial clearance at joint of folding and unfolding mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN110155373A CN110155373A (en) | 2019-08-23 |
| CN110155373B true CN110155373B (en) | 2020-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910501549.1A Active CN110155373B (en) | 2019-06-11 | 2019-06-11 | Device for eliminating radial clearance at joint of folding and unfolding mechanism |
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| CN (1) | CN110155373B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685429A (en) * | 2021-07-30 | 2021-11-23 | 长沙天仪空间科技研究院有限公司 | Unfolding structure and unfolding method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4932807A (en) * | 1988-07-28 | 1990-06-12 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Clevis joint for deployable space structures |
| US5709500A (en) * | 1995-04-25 | 1998-01-20 | Mizelle; Ned W. | Furniture, furniture manufacturing method, and connector assembly |
| CN2760326Y (en) * | 2004-11-05 | 2006-02-22 | 铭异科技股份有限公司 | Rotating shaft structure with adjustable load bearing |
| US8469622B2 (en) * | 2007-11-26 | 2013-06-25 | Esco Corporation | Pinned connections |
| CN203146568U (en) * | 2013-04-02 | 2013-08-21 | 成都飞机设计研究所 | Hinge self-adaptive conical connecting assembly |
| CN106364700B (en) * | 2016-08-29 | 2018-11-09 | 南京航空航天大学 | The space development mechanism of mechanismic design is unfolded based on Dermaptera insect earwig hind wing |
| CN107054693B (en) * | 2017-05-05 | 2023-10-17 | 燕山大学 | Single-degree-of-freedom asymmetric shear hinge type expandable mechanism unit |
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