阅读说明：本技术 自适应绳索张紧力调节系统及调节方法 (Self-adaptive rope tension adjusting system and method ) 是由 刘卫 鄢青青 马超 刘学 满剑锋 潘秋月 张伟伟 于 2020-07-21 设计创作，主要内容包括：本发明提供了自适应绳索张紧力调节系统,包括至少3个定位点,其中,两个定位点分别设有绳头连接组件,其余至少一个定位点设有张紧轮组件,绳索两端分别与绳头连接组件固联,所述绳索通过张紧轮组件；所述张紧轮组件包括弹性伸缩组件,所述弹性伸缩组件端部设有绳轮。本发明能够利用张紧轮组件随温度变化自动、即时的调整传动路径长度,有效起到补偿绳索张紧力变化的作用,保持绳索张紧力稳定在合理范围内,可解决太空环境温度变化造成绳索断裂或松弛的问题；利用调整螺栓与连接支架的螺纹配合长度,在绳索压接后长度无法改变的情况下,仍可精准调整、控制绳索的安装张紧力,解决了绳索张紧力与设计值存在偏差的问题,避免了重复性的尝试装配。(The invention provides a self-adaptive rope tension adjusting system which comprises at least 3 positioning points, wherein two positioning points are respectively provided with a rope head connecting assembly, the other at least one positioning point is provided with a tension wheel assembly, two ends of a rope are respectively fixedly connected with the rope head connecting assembly, and the rope passes through the tension wheel assembly; the tensioning wheel assembly comprises an elastic telescopic assembly, and a rope wheel is arranged at the end part of the elastic telescopic assembly. The invention can automatically and immediately adjust the length of the transmission path by utilizing the tensioning wheel component along with the temperature change, effectively play a role in compensating the tension change of the rope, keep the tension of the rope stable in a reasonable range and solve the problem of rope fracture or looseness caused by the temperature change of the space environment; by means of the threaded matching length of the adjusting bolt and the connecting support, under the condition that the length cannot be changed after the rope is in compression joint, the installation tension of the rope can be accurately adjusted and controlled, the problem that the rope tension is deviated from a design value is solved, and repeated trial assembly is avoided.)

1. Self-adaptation rope tension force governing system, its characterized in that: the rope fixing device comprises at least 3 positioning points, wherein two positioning points are respectively provided with a rope end connecting component (1), the rest at least one positioning point is provided with a tensioning wheel component (4), two ends of a rope (2) are respectively fixedly connected with the rope end connecting components (1), and the rope (2) passes through the tensioning wheel components (4);

the tensioning wheel assembly (4) comprises an elastic telescopic assembly, and a rope wheel (44) is arranged at the end part of the elastic telescopic assembly.

2. The adaptive rope tension adjustment system of claim 1, wherein: comprises at least 4 positioning points, wherein at least one positioning point is provided with a guide wheel component (3).

3. The adaptive rope tension adjustment system of claim 1, wherein: the tensioning wheel assembly (4) comprises a support (41) and a sliding shaft (42), the sliding shaft (42) penetrates through the support (41) and is in elastic sliding fit with the support, a rope wheel support (43) is arranged at the end part of the extending end of the sliding shaft (42), the rope wheel support (43) is of a U-shaped structure, the bottom of the U-shaped structure is fixedly connected with the sliding shaft (42), and a rope wheel (44) in rotating fit with the sliding shaft is arranged between two side walls.

4. The adaptive rope tension adjustment system of claim 3, wherein: a first sliding shaft support (411) and a second sliding support (412) are respectively arranged at two ends of the support (41), the middle of the first sliding support (411) is a round hole, and the middle of the second sliding support (412) is a special-shaped hole; correspondingly, the sliding shaft (42) is divided into two sections, a first section of sliding shaft (421) is cylindrical, the size of the first section of sliding shaft is matched with the center hole of the first sliding shaft support (411), a second section of sliding shaft (422) is a rod-shaped object with the cross section matched with the size of the special-shaped hole in the middle of the second sliding support (412), a shaft shoulder (423) is arranged at the joint of the second section of sliding shaft (422) and the first section of sliding shaft (421), and a spring (45) is arranged between the shaft shoulder (423) and the first sliding shaft support (411).

5. The adaptive rope tension adjustment system of claim 3, wherein: rope retainers (46) are arranged outside two side walls of the rope wheel bracket (43), and the rope retainers (46) are of U-shaped structures and cover the periphery of the rope wheel (44).

6. The adaptive rope tension adjustment system of claim 1, wherein: rope end coupling assembling (1) is including fixed bolster (11), fixed bolster (11) lateral wall is equipped with adjusting bolt (12) rather than the spiro union, adjusting bolt (12) are equipped with through-hole (121) along its length direction, adjusting bolt (12) are passed to the rope, the tip of rope (2) is in the bolt head side of adjusting bolt (12), the tip of rope (2) still is equipped with pin (13), rope (2) are passed pin (13) and link firmly with it.

7. The adaptive rope tension adjustment system of claim 6, wherein: the adjusting bolt (12) is connected with a locking nut (14) in a threaded mode, the locking nut (14) is arranged between a bolt head of the adjusting bolt (12) and the fixing support (11), and the end face of the locking nut (14) abuts against the side wall of the fixing support (11).

8. The adaptive rope tension adjustment system of claim 6, wherein: the pin (13) is made of stainless steel or copper and can deform by external force.

9. Method for adjusting an adaptive rope tension adjustment system, using an adaptive rope tension adjustment system according to any of claims 1-8, characterized in that it comprises the steps of:

positioning a fixing piece: installing the rope head connecting assembly (1), the tensioning wheel assembly (4) and the guide wheel assembly (3) and determining a transmission path of the rope (2);

rope positioning: a rope (2) penetrates through the rope head connecting assembly (1) at one end, passes through the tensioning wheel assembly (4) and the guide wheel assembly (3) according to a transmission path, penetrates out of the rope head connecting assembly (1) at the other end, and is fixed after the length of the rope and the expansion amount of the tensioning wheel assembly (4) are adjusted;

fine adjustment of tension force: the actual using length of the rope (2) is finely adjusted by adjusting the rope head extension amount at the rope head connecting assembly (1), so that the tension of the tension wheel assembly (4) is within a certain threshold range.

10. The method of adjusting an adaptive rope tension adjustment system according to claim 9, characterized in that: the rope (2) is deformed and fixed by extruding the pin (13) through external force.

Technical Field

The invention relates to the technical field of rope tension adjustment, in particular to a self-adaptive rope tension adjusting system and method.

Background

In the technical field of spacecrafts, ropes such as steel wire ropes and Kevlar ropes are widely used as transmission devices of spacecraft mechanisms such as solar wings and antenna unfolding arms, and the ropes are generally cut off and installed in a mode of crimping two ends and are key components for unfolding the spacecraft mechanisms. The rope tension needs to be kept within a reasonable range for smooth and safe deployment of the mechanism, the tension value being mainly influenced by the length of the rope. However, in the assembling process of the mechanism, under the influence of factors such as the size precision, the installation deviation and the length precision of the rope of the mechanism, the tension value of the rope often has an incompletely controllable deviation from the designed value. In the case of a tension not meeting the design requirements, the crimped rope can only be cut off, and repeated attempts are made to crimp a new rope again for commissioning and installation until an acceptable force value is obtained. The above process is cumbersome and difficult to ensure the accuracy of the rope tension, seriously affecting the normal performance of the spacecraft mechanism and not beneficial to the normal deployment of the spacecraft mechanism.

Although the installation of the cable can be completed through continuous trials, the length of the cable after crimping cannot be adjusted again, the spacecraft mechanism faces high and low temperature alternating temperature environments along with the flight of the spacecraft in space, and the thermal expansion coefficient of the cable is often different from that of the mechanism material, so that the cable tension is gradually reduced or increased along with the temperature change in the extremely high and low temperature environments. Under the condition of reducing the tensioning force of the rope, the rope is loosened and even falls off from a transmission path, so that the mechanism cannot be unfolded; the increase in rope tension, once beyond the rope breaking load or the mechanism can withstand the load, can result in rope breakage or mechanism failure, which can still result in the mechanism failing to deploy and causing an irreparable loss. Therefore, aiming at the docking of the planet vehicle, a simpler and more convenient docking method is sought, a driving device is reduced, the iterative computation amount is reduced, and the method has larger attitude adaptability compensation capability and is a main difficulty of technical research and development.

Therefore, it is necessary to develop an adjusting system capable of adaptively adjusting the tension of the rope according to the change of the length of the rope, so as to prevent the rope from being loosened due to the change of high and low temperatures and the like, thereby affecting the function of the rope.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a self-adaptive rope tension adjusting system which can automatically and immediately adjust the length of a transmission path by utilizing a tension wheel assembly along with the temperature change, effectively play a role in compensating the tension change of a rope, keep the tension of the rope stable in a reasonable range and solve the problem of rope fracture or looseness caused by the change of the space environment temperature; by means of the threaded matching length of the adjusting bolt and the connecting support, under the condition that the length cannot be changed after the rope is in compression joint, the installation tension of the rope can be accurately adjusted and controlled, the problem that the rope tension is deviated from a design value is solved, and repeated trial assembly is avoided. Correspondingly, the invention further provides an adjusting method of the self-adaptive rope tension adjusting system.

The invention provides a self-adaptive rope tension adjusting system which comprises at least 3 positioning points, wherein two positioning points are respectively provided with a rope head connecting assembly, the other at least one positioning point is provided with a tension wheel assembly, two ends of a rope are respectively fixedly connected with the rope head connecting assembly, and the rope passes through the tension wheel assembly; the tensioning wheel assembly comprises an elastic telescopic assembly, and a rope wheel is arranged at the end part of the elastic telescopic assembly.

According to the scheme, rope head connecting assemblies are arranged at two positions of the positioning points, one or more positioning points are additionally arranged, the one or more positioning points are provided with tensioning wheel assemblies, two ends of the rope are fixed to the rope head connecting assemblies, the middle part of the rope penetrates through the tensioning wheel assemblies, the positions of the rope head connecting assemblies and the tensioning wheel assemblies determine the transmission path of the rope, the telescopic stroke of the tensioning wheel assemblies determines the adaptability to the length change of the rope, the length change of the rope is caused by expansion with heat and contraction with cold or other possible length changes of the rope due to high and low temperature environments, and the specific expression is as follows: the length of the rope in the transmission path is increased or reduced, the telescopic stroke of the tensioning wheel component is increased or reduced, the rope tensioning force is also reduced or increased, the rope length is increased to a theoretical maximum value, the rope tensioning force is still larger than zero, the rope length is shortened to a theoretical minimum value, and the rope tensioning force is not enough to cause structural damage or over-stroke of the tensioning wheel component.

As optimization, at least 4 positioning points are included, wherein at least one positioning point is provided with a guide wheel assembly.

According to the optimization scheme, two positions of the positioning points are provided with rope head connecting assemblies, the other positioning points can be a combination of a single guide wheel assembly and at least one tensioning wheel assembly, and at least one guide wheel assembly and one tensioning wheel assembly, wherein the guide wheel assemblies have the function of changing the direction of the rope, the structure is simpler compared with the tensioning wheel assemblies, the number of the tensioning wheel assemblies can be selected according to the length of the telescopic amount of the rope, and due to the fact that the stroke of the tensioning wheel assemblies is determined, if the telescopic amount of the rope exceeds the adjustable range of the single tensioning wheel assembly, the number of the tensioning wheel assemblies can be increased so as to.

Preferably, the tensioning wheel assembly comprises a support and a sliding shaft, the sliding shaft penetrates through the support and is in elastic sliding fit with the support, a rope wheel support is arranged at the end part of the extending end of the sliding shaft, the rope wheel support is of a U-shaped structure, the bottom of the U-shaped structure is fixedly connected with the sliding shaft, and a rope wheel in rotating fit with the rope wheel is arranged between two side walls.

According to the optimized scheme, the sliding shaft and the support are in elastic sliding fit, the extension amount of the sliding shaft is increased when the rope is lengthened, the extension amount of the sliding shaft is reduced when the rope is shortened, and the elastic sliding fit can be in various forms, such as a spring, an elastic damping piece, an elastic sheet and the like.

Further, as optimization, a first sliding shaft support and a second sliding support are respectively arranged at two ends of the support, the middle of the first sliding support is a round hole, and the middle of the second sliding support is a special-shaped hole; correspondingly, the sliding shaft is divided into two sections, the first section of sliding shaft is cylindrical, the size of the first section of sliding shaft is matched with the center hole of the first sliding shaft support, the second section of sliding shaft is a rod-shaped object with the cross section matched with the size of the special-shaped hole in the middle of the second sliding support, a shaft shoulder is arranged at the joint of the second section of sliding shaft and the first section of sliding shaft, and a spring is arranged between the shaft shoulder and the first sliding shaft support.

According to the optimization scheme, a spring is selected as an implementation mode of elastic sliding fit, the first sliding shaft support and the second sliding support play roles in supporting and limiting, the distance between the two supports limits the stroke of the tensioning wheel assembly, and the middle part of the second sliding support is a special-shaped hole which can prevent the sliding shaft from rotating.

Preferably, rope retainers are arranged outside two side walls of the rope wheel bracket and are of U-shaped structures and cover the peripheries of the rope wheels.

According to this preferred embodiment, the rope holder prevents the rope from falling off the sheave.

As an optimization, rope end coupling assembling includes the fixed bolster, the fixed bolster lateral wall is equipped with the adjusting bolt rather than the spiro union, adjusting bolt is equipped with the through-hole along its length direction, the rope passes adjusting bolt, the tip of rope is in adjusting bolt's bolt head side, the tip of rope still is equipped with the pin, the rope passes the pin links firmly with it.

According to the optimization scheme, the length of the rope in the transmission path is basically determined after the end part of the rope is fixedly connected with the pin, and the length of the rope in the transmission path can be finely adjusted by finely adjusting the screwing-in depth of the bolt and the fixing bracket.

Preferably, the adjusting bolt is screwed with a locking nut, the locking nut is arranged between the bolt head of the adjusting bolt and the fixed support, and the end face of the locking nut abuts against the side wall of the fixed support.

According to the optimization scheme, the locking nut can prevent the adjusting bolt from loosening and shifting to cause the change of the length of the rope in the transmission path.

Preferably, the pin is made of stainless steel or copper and can deform by external force.

According to the optimized scheme, the stainless steel or copper material is soft and easy to deform, and the rope is not easy to separate after being clamped.

The invention also provides an adjusting method of the self-adaptive rope tension adjusting system, which comprises the following steps:

positioning a fixing piece: installing the rope head connecting assembly, the tensioning wheel assembly and the guide wheel assembly to determine a transmission path of the rope;

rope positioning: a rope penetrates through the rope head connecting assembly at one end, passes through the tensioning wheel assembly and the guide wheel assembly according to a transmission path, penetrates out of the rope head connecting assembly at the other end, and is fixed after the length of the rope and the expansion amount of the tensioning wheel assembly are adjusted;

fine adjustment of tension force: the actual using length of the rope is finely adjusted by adjusting the rope head extension amount at the rope head connecting assembly, so that the tension of the tension wheel assembly is within a certain threshold range.

According to the scheme, the self-adaptive rope tension adjusting system is simple to install, convenient to adjust, controllable in tension and adjustable in length of the rope in the transmission path.

Preferably, the rope is deformed and fixed by the pin extruded by external force.

According to the optimized scheme, the rope end fixing mode is simple, reliable and easy to operate and is not easy to loosen.

Compared with the prior art, the invention has the advantages that:

1) the rope tension adjusting system utilizes the tension wheel component to automatically and immediately adjust the length of a transmission path along with the temperature change, effectively plays a role in compensating the tension change of a rope, keeps the tension of the rope stable in a reasonable range, and can solve the problem of rope fracture or looseness caused by the temperature change of the space environment;

2) the rope tension adjusting system utilizes the thread fit length of the adjusting bolt and the connecting support, can still accurately adjust and control the installation tension of the rope under the condition that the length cannot be changed after the rope is crimped, solves the problem that the rope tension has deviation from a design value, and avoids repeated trial assembly;

3) the support of the tensioning wheel assembly is designed in an integrated structure, the coaxiality of the support and the shaft hole matching of the sliding shaft is easily guaranteed, the two sections of sliding shafts are connected through the sliding support by the two ends of the support after penetrating through the sliding support through threads, the installation is simple and convenient, and the smooth movement of the sliding shafts is guaranteed.

Drawings

FIG. 1 is a position relationship diagram of the adaptive rope tension adjustment system of the present invention;

figure 2 is a cross-sectional view of the rope end connection assembly of the present invention;

fig. 3 is a schematic structural view of the rope end connecting assembly of the present invention;

FIG. 4 is a schematic structural view of the tension wheel assembly of the present invention;

FIG. 5 is a cross-sectional view of the tension wheel assembly of the present invention;

FIG. 6 is a mechanical schematic of the mount of the present invention;

fig. 7 is a mechanical schematic of the guide wheel assembly of the present invention.

Description of the reference numerals

1-rope end connecting assembly, 11-fixing support, 12-adjusting bolt, 121-through hole, 13-pin and 14-locking nut; 2-a rope; 3-a guide wheel assembly; 4-tension wheel assembly, 41-support, 411-first sliding shaft support, 412-second sliding support, 42-sliding shaft, 421-first section sliding shaft, 422-second section sliding shaft, 423-shaft shoulder, 43-rope wheel support, 44-rope wheel, 45-spring and 46-rope holding frame.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments (examples), which are described herein for illustrative purposes only and are not intended to be a basis for limiting the present invention.