CN109733646B - Elastic compensation type stay cord locking mechanism - Google Patents
Elastic compensation type stay cord locking mechanism Download PDFInfo
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- CN109733646B CN109733646B CN201811653749.0A CN201811653749A CN109733646B CN 109733646 B CN109733646 B CN 109733646B CN 201811653749 A CN201811653749 A CN 201811653749A CN 109733646 B CN109733646 B CN 109733646B
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Abstract
The invention provides an elastic compensation type stay cord locking mechanism which comprises an installation base, a compression spring, a T-shaped sliding sleeve, an adjusting screw, a guide collecting sleeve, a stay cord and a set screw, wherein the compression spring is arranged on the installation base; the center of the bottom surface of the mounting base is provided with a through hole for the passing and withdrawing of a pull rope, and the side surface of the mounting base is provided with an external thread with a certain depth for preloading a compression spring and mounting a guide collecting sleeve; the outside of adjusting screw sets up the screw thread of sufficient length to guarantee its sufficient adjustment range, the center sets up the through-hole, so that supply the stay cord to pass through with axial activity, the top sets up spacing taper hole, with radial and axial displacement after the restriction stay cord locking. The invention solves the problems of difficult locking, quick tension attenuation and the like caused by creep deformation of the pull rope when the fiber rope such as Kevlar, high-strength polyethylene and the like is directly applied to expandable components such as solar sailboards, folding antennas and the like under load, and can provide the pull rope with a tension suitable for hot cutting, so that the fiber pull rope can be applied to a locking mechanism under a large load.
Description
Technical Field
The invention relates to the technical field of spacecraft locking, in particular to an elastic compensation type pull rope locking mechanism.
Background
At present, the folding and locking of the expandable components such as the solar sailboard and the folding antenna of the spacecraft are generally carried out by direct rigid connection through bolts, bolts and the like, and the traditional locking mechanism has the advantages of high reliability, high connection rigidity and the like and is generally used for the unlocking and connection of related components on a larger spacecraft. However, the unlocking mechanism corresponding to the locking mechanism has a complex principle and structure, and has the disadvantages of high manufacturing cost, large unlocking impact, and even possible pollutant generation. Along with the development trend of miniaturization and light weight of the current spacecraft, particularly the rapid development of the manufacturing and application fields of the microsatellite, the locking mechanism obviously cannot meet the requirement of the technical development of the fields. The small-sized spacecraft, in particular to the micro-satellite solar sailboard, the foldable nature and other expandable components, put new requirements on the locking mechanism, wherein the locking mechanism has the advantages of simple and compact structure, light weight, low manufacturing cost, reliable connection, small unlocking impact, no pollution and the like.
The existing fiber ropes of Kevlar, high-strength polyethylene and the like are widely used in spacecrafts due to the outstanding advantages of high tensile strength, good space environment stability and the like. Moreover, the fiber rope locking mechanism can be provided with a small unlocking mechanism which meets the requirements of compact structure, light weight, low cost, small unlocking impact and the like, and meets the application requirements of the prior art and the future on small spacecrafts, particularly microsatellites. However, the tension attenuation due to the creep, which is difficult to control, of fiber ropes such as kevlar and high-strength polyethylene has limited application in locking mechanisms that require long-term stability under large loading conditions.
Therefore, the problem that the fiber ropes such as Kevlar and high-strength polyethylene are stable for a long time under a large load condition is solved, and the method has practical significance for expanding the application range of the fiber ropes.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an elastic compensation type pull rope locking mechanism, which solves the problems of difficult locking, quick tension attenuation and the like caused by creep deformation of a pull rope when fiber ropes such as Kevlar, high-strength polyethylene and the like are directly applied to expandable components such as a solar sailboard, a folding antenna and the like under load and locked, and can provide a tension suitable for hot cutting for the pull rope, so that the larger load application of the fiber pull rope in the locking and releasing mechanism becomes possible. The invention is realized by the following technical scheme:
an elastically compensated pull cord locking mechanism, the locking mechanism comprising: the device comprises an installation base, a compression spring, a T-shaped sliding sleeve, an adjusting screw, a guide collecting sleeve, a pull rope and a set screw; the center of the bottom surface of the mounting base is provided with a through hole for the passing and withdrawing of a pull rope, and the side surface of the mounting base is provided with an external thread with a certain depth for preloading a compression spring and mounting a guide collecting sleeve; the T-shaped sliding sleeve and the adjusting screw are arranged in the guide collecting sleeve, and the center of the T-shaped sliding sleeve is provided with a thread with enough length so as to provide enough adjusting range for the adjusting screw; one end of the guide collecting sleeve is provided with an annular top surface so as to ensure that the T-shaped sliding sleeve can be blocked and collected after unlocking, and the adjusting screw can keep enough retreat stroke; the side surface of the guide collecting sleeve is provided with a cylindrical surface with a certain width so as to ensure the radial stability of the compression spring-T-shaped sliding sleeve assembly after being loaded.
As a further improvement of the invention, the guide collecting sleeve is provided with an internal thread with a certain depth to ensure the connection and fixation of the guide collecting sleeve and the mounting base, and the side surface of the guide collecting sleeve is provided with a hole with enough size to observe and measure the state and the compression amount of the compression spring after being locked.
As a further improvement of the invention, the T-shaped sliding sleeve is provided with a guide section with enough length to maintain the stability of the compression spring in the compression and release actions.
As a further improvement of the invention, the outer side of the adjusting screw is provided with a thread with enough length to ensure the enough adjusting range, the center of the adjusting screw is provided with a through hole for the stay cord to pass through and move axially, and the top end of the adjusting screw is provided with a limiting taper hole to limit the radial and axial movement of the stay cord after being locked.
As a further improvement of the invention, the compression spring sets the stiffness and compression related to the loading and deformation of the pull rope to achieve an optimum level of its elastic compensation performance.
As a further improvement of the invention, the two ends of the set length of the pull rope are provided with curing points, and composite curing treatment is carried out to improve the rigidity and the bearing capacity of the pull rope.
As a further improvement of the invention, the top end of the set screw is provided with a groove for the tightening and fixing of a tool; the tail end is provided with a counter bore with a certain depth for limiting and curing the tail end of the pull rope.
As a further improvement of the invention, when the locking mechanism is locked, one end of the pull rope is fastened and positioned through a set screw, and the other free end of the pull rope passes through the mounting base, the compression spring, the T-shaped sliding sleeve and the adjusting screw in sequence and is fastened on the top surface of the adjusting screw; the purpose of adjusting the set tension of the pull rope is achieved by rotating the adjusting screw to adjust the compression amount of the compression spring; the guide collecting sleeve is screwed into the side thread of the mounting base, and the inner side surface of the guide collecting sleeve is matched with the sliding sleeve 3 to provide radial limit; the side holes of the spring can be used for observing and measuring the compression spring.
As a further improvement of the invention, when the locking mechanism is unlocked, the stay cord which is constantly loaded is cut off, the compression spring instantly releases the compressed displacement and pushes the T-shaped sliding sleeve-adjusting screw assembly to axially move along the inner side of the guide collecting sleeve, so that the stay cord is completely cut off and the broken end timely exits from the cutting area; finally, the top surface of the T-shaped sliding sleeve moves to the bottom surface of the guide collecting sleeve and is collected.
The invention has the beneficial effects that: compared with the prior art, the elastic compensation locking mechanism has the advantages that: the structure is simple, the action is reliable, and batch manufacturing, popularization and application are easy to realize; the locking force of the mechanism can be adjusted, and the residual locking force can be measured; the problem that the tensile force generated by creep deformation is attenuated too fast in the process of directly loading the fiber pull rope is solved; the elastic coefficient of a pull rope system is reduced, and the anti-interference capability of the pull rope system in vibration, high and low temperature change and other use environments is improved.
Drawings
FIG. 1 is a schematic diagram of the construction of the spring-compensated locking mechanism of the present invention;
FIG. 2 is a schematic view of the mounting base of the present invention;
FIG. 3 is a schematic view of a T-shaped sliding sleeve of the present invention;
FIG. 4 is a schematic view of an adjustment screw of the present invention;
FIG. 5 is a schematic view of a guide collection sleeve of the present invention;
FIG. 6 is a schematic illustration of a treated pull cord;
FIG. 7 is a schematic view of a set screw of the present invention;
FIG. 8 is a schematic view of the locking mechanism of the present invention when locked;
FIG. 9 is a schematic view of the locking mechanism of the present invention when unlocked;
fig. 10 is a sectional view a-a of fig. 9.
Detailed Description
The invention is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.
As shown in figure 1, the small elastic compensation locking mechanism comprises an installation base 1, a compression spring 2, a T-shaped sliding sleeve 3, an adjusting screw 4, a guide collecting sleeve 5, a pull rope 6 and a set screw 7.
As shown in fig. 2, a through hole 8 is formed in the center of the bottom surface of the mounting base 1 for passing and withdrawing a pulling rope. The sides are provided with an external thread 9 of a certain depth for preloading the compression spring 2 and for mounting the guide collection sleeve 5.
The compression spring 2 is provided with rigidity and compression quantity related to the loading and deformation of the pull rope 6, so that the elastic compensation performance of the compression spring reaches an optimal level.
As shown in fig. 3, the T-shaped sliding sleeve 3 is provided with a guide section 10 of sufficient length to maintain the stability of the compression spring 2 in the compression and release actions. The centre is provided with a thread 11 of sufficient length to provide a sufficient adjustment range of the adjustment screw 4.
As shown in fig. 4, the adjusting screw 4 is provided with a thread 12 of sufficient length on its outer side to ensure a sufficient adjustment range. The center is provided with a through hole 13 for the pull rope to pass through and move axially. The top end is provided with a limiting taper hole 14 to limit the radial and axial movement of the pull rope after being locked.
As shown in fig. 5, the guiding and collecting sleeve 5 is provided with a certain depth of internal thread 15 to ensure the connection and fixation with the mounting base 1. The side is provided with a hole 16 large enough to observe and measure the state and the amount of compression of the compression spring 2 after locking. The side surface is provided with a cylindrical surface 17 with a certain width so as to ensure the radial stability of the compression spring 2-T-shaped sliding sleeve 3 assembly after being loaded. One end is provided with an annular top surface 18 to ensure that the T-shaped sliding sleeve 3 can be blocked and the collection and adjustment screws 4 can keep enough retreat stroke after unlocking.
As shown in FIG. 6, the pulling rope 6 can be selected from different materials, weaving manners and specifications according to the loading condition, the two ends of the length are set with the curing points 19 and 20, and composite curing treatment is carried out to improve the rigidity and the bearing capacity of the pulling rope.
The set screw 7 is shown in fig. 7, and the top end is provided with a 'one' or 'ten' shaped groove 21 for the tool to tighten and fix. The tail end is provided with a counter bore 22 with a certain depth for limiting and solidifying the tail end of the pull rope 6.
When the elastic compensation locking mechanism is locked, as shown in fig. 8, one end of the pull rope 6 is embedded into the counter bore 22 through the set screw 7 to form a curing point 20, and the other free end of the pull rope passes through the central through hole 8 of the mounting base 1, the compression spring 2, the central through hole 11 of the T-shaped sliding sleeve 3 and the central through hole 13 of the adjusting screw 4 in sequence, and forms a curing point 19 in the limiting hole 14 on the top surface of the adjusting screw 7. Wherein, the two curing points 19 and 20 of the pull rope 6 are cured by a composite material forming mechanism, thereby greatly improving the rigidity of the fixed part of the pull rope and reducing the tensile deformation. At the moment, the compression spring 2 is compressed and the pull rope 6 is stretched, the compression spring and the pull rope are connected in series to form a quasi-elastic system with a smaller elastic coefficient, and the output load of the quasi-elastic system acts on the axial compression of the first solar sailboard and the second solar sailboard; the system has a much smaller spring rate than the pull cord, and therefore its susceptibility to cord creep under load is greatly reduced.
When needed, the compression amount of the compression spring 2 can be adjusted by rotating the thread 12 of the adjusting screw 4 so as to achieve the purpose of adjusting and setting the bearing tension of the pull rope 6. The internal thread 15 of the guide collecting sleeve 5 is screwed into the external thread 9 on the side surface of the mounting base 1, and the inner side of the cylindrical surface 17 of the guide collecting sleeve is matched with the T-shaped sliding sleeve 3 to provide radial limit; the side holes 16 of the spring allow the amount of compression of the compression spring 2 to be observed and measured.
The optimized setting is as follows: the top surface of the T-shaped sliding sleeve 3 is far enough from the annular bottom surface 18 of the guide collecting sleeve 5 to ensure that the pull rope 6 can completely exit from the cutting area after being cut off; the top surface of the adjusting screw 7 is exposed out of the annular bottom surface 18 of the guide collecting sleeve 5 so as to avoid accidental interference between the adjusting screw and the annular bottom surface; the amount of compression of the compression spring 2 at that time can be directly observed and indirectly measured through the side hole 16 of the guide collection sleeve 5.
As shown in fig. 9, when the elastic compensation locking mechanism is unlocked, the loaded pull rope 6 is cut off, the compression spring 2 instantly releases the compressed displacement and pushes the T-shaped sliding sleeve 3-adjusting screw 4 assembly to axially move along the inner side of the cylindrical surface 17 of the guide collecting sleeve 5, so as to ensure that the pull rope 6 is completely cut off and the broken end timely exits from the cutting area. And finally, the top surface of the T-shaped sliding sleeve 3 moves to the annular bottom surface 18 of the guide collecting sleeve 5 and is limited at the position, the residual compression amount of the compression spring 2 ensures that the T-shaped sliding sleeve 3 is in compression fit with the guide collecting sleeve 5, and the unlocked parts are still relatively stable.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
For those skilled in the art, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The utility model provides an elasticity compensation formula stay cord locking mechanism which characterized in that: the locking mechanism comprises a mounting base, a compression spring, a T-shaped sliding sleeve, an adjusting screw, a guide collecting sleeve, a pull rope and a set screw; the center of the bottom surface of the mounting base is provided with a through hole for the passing and withdrawing of a pull rope, and the side surface of the mounting base is provided with an external thread with a certain depth for preloading a compression spring and mounting a guide collecting sleeve; the guide collecting sleeve is provided with an internal thread with a certain depth so as to ensure the connection and fixation of the guide collecting sleeve and the mounting base; the T-shaped sliding sleeve and the adjusting screw are arranged in the guide collecting sleeve, and the center of the T-shaped sliding sleeve is provided with a thread with enough length so as to provide enough adjusting range for the adjusting screw; one end of the guide collecting sleeve is provided with an annular top surface so as to ensure that the T-shaped sliding sleeve can be blocked and collected after unlocking, and the adjusting screw can keep enough retreat stroke; a cylindrical surface with a certain width is reserved on the side surface of the guide collecting sleeve to ensure the radial stability of a loaded assembly formed by the compression spring and the T-shaped sliding sleeve; and a counter bore with a certain depth is arranged at the tail end of the set screw so as to limit and solidify the tail end of the pull rope.
2. The latch mechanism of claim 1, wherein: and a hole which is large enough is formed in the side surface of the guide collecting sleeve so as to observe and measure the state and the compression amount of the compression spring after being locked.
3. The latch mechanism of claim 1, wherein: the T-shaped sliding sleeve is provided with a guide section with enough length to maintain the stability of the compression spring in the actions of compression and release.
4. The latch mechanism of claim 1, wherein: the outer side of the adjusting screw is provided with threads with enough length so as to ensure the enough adjusting range of the adjusting screw, the center of the adjusting screw is provided with a through hole for the stay cord to pass through and move axially, and the top end of the adjusting screw is provided with a limiting taper hole so as to limit the radial and axial movement of the stay cord after being locked.
5. The latch mechanism of claim 1, wherein: the compression spring sets the stiffness and compression related to the loading and deformation of the pull rope so that the elastic compensation performance of the compression spring reaches an optimal level.
6. The latch mechanism of claim 1, wherein: and two ends of the set length of the pull rope are provided with curing points, and the composite curing treatment is carried out to improve the rigidity and the bearing capacity of the pull rope.
7. The latch mechanism of claim 1, wherein: the top end of the fastening screw nail is provided with a groove for screwing and fixing tools.
8. The latch mechanism of claim 2, wherein: when the locking mechanism is locked, one end of the pull rope is fastened and positioned through the fastening screw, and the other free end of the pull rope passes through the mounting base, the compression spring, the T-shaped sliding sleeve and the adjusting screw in sequence and is fastened on the top surface of the adjusting screw; the purpose of adjusting the set tension of the pull rope is achieved by rotating the adjusting screw to adjust the compression amount of the compression spring; the guide collecting sleeve is screwed into the threads on the side surface of the mounting base, and the inner side surface of the guide collecting sleeve is matched with the T-shaped sliding sleeve (3) to provide radial limit; the side hole of the guide collecting sleeve can be used for observing and measuring the compression spring.
9. The latch mechanism of claim 1, wherein: when the locking mechanism is unlocked, the pull rope which is constantly loaded is cut off, the compression spring instantly releases the compressed displacement and pushes the component formed by the T-shaped sliding sleeve and the adjusting screw to axially move along the inner side of the guide collecting sleeve, so that the pull rope is completely cut off, and the broken end timely exits from a cutting area; finally, the top surface of the T-shaped sliding sleeve moves to the bottom surface of the guide collecting sleeve and is collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653749.0A CN109733646B (en) | 2018-12-29 | 2018-12-29 | Elastic compensation type stay cord locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811653749.0A CN109733646B (en) | 2018-12-29 | 2018-12-29 | Elastic compensation type stay cord locking mechanism |
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| Publication Number | Publication Date |
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| CN109733646A CN109733646A (en) | 2019-05-10 |
| CN109733646B true CN109733646B (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811653749.0A Active CN109733646B (en) | 2018-12-29 | 2018-12-29 | Elastic compensation type stay cord locking mechanism |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112918704B (en) * | 2021-01-22 | 2022-07-12 | 中国科学院沈阳自动化研究所 | Mechanism for optimizing spacecraft solar sailboard to overcome rocket launching mechanical environment |
| CN114963892A (en) * | 2021-02-19 | 2022-08-30 | 北京九天微星科技发展有限公司 | Connecting and unlocking device suitable for multi-satellite separation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6742745B2 (en) * | 2001-11-01 | 2004-06-01 | Michigan Aerospace Corporation | Autonomous satellite docking system |
| CN103264775A (en) * | 2013-04-23 | 2013-08-28 | 上海卫星工程研究所 | Flexible rope pressing device and using method |
| CN104901250A (en) * | 2015-06-11 | 2015-09-09 | 张兴莲 | Overhead metal line length change compensation device |
| CN105864360A (en) * | 2016-03-30 | 2016-08-17 | 上海卫星工程研究所 | Tensional cable assembly applied to flexible pressing and releasing device of spacecraft |
-
2018
- 2018-12-29 CN CN201811653749.0A patent/CN109733646B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6742745B2 (en) * | 2001-11-01 | 2004-06-01 | Michigan Aerospace Corporation | Autonomous satellite docking system |
| CN103264775A (en) * | 2013-04-23 | 2013-08-28 | 上海卫星工程研究所 | Flexible rope pressing device and using method |
| CN104901250A (en) * | 2015-06-11 | 2015-09-09 | 张兴莲 | Overhead metal line length change compensation device |
| CN105864360A (en) * | 2016-03-30 | 2016-08-17 | 上海卫星工程研究所 | Tensional cable assembly applied to flexible pressing and releasing device of spacecraft |
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| CN109733646A (en) | 2019-05-10 |
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Address after: 518000 whole building of satellite building, 61 Gaoxin South Jiudao, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Aerospace Dongfanghong Satellite Co.,Ltd. Address before: 518000 whole building of satellite building, 61 Gaoxin South Jiudao, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: AEROSPACE DONGFANGHONG DEVELOPMENT Ltd. |