Rope one-way self-locking device, flying net closing device and space debris capturing device
By using a rope one-way self-locking device in the space debris capture system, the problem of automatic expansion of the flying net port when closing is solved, and a higher reliability and stability of the capture system are achieved.
Patent Information
- Application Number
- CN202411863489.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-02-07
AI Technical Summary
The existing space debris capture system is prone to automatic expansion during the tightening of the flying network port, which affects the capture efficiency and stability.
A single-way self-locking device for ropes with a small size, simple structure and reliable function is adopted. The device includes a housing with an inner cavity and a slidable slider. The single-line of the rope is realized by the asymmetric slope of the slider and the friction force. Lock to prevent the network port from expanding automatically.
Effectively prevent the flying network port from automatically expanding when the port is closed, improve the reliability and stability of the capture system, and ensure the safe capture of space debris.
Smart Images
Figure CN119389463A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of aerospace technology, and in particular to a one-way self-locking device for a rope, a flying net closing device and a space debris capturing device. Background Art
[0002] With the development of space technology and the deepening of space exploration missions, a considerable number of satellites are launched into space every year. The steady increase in the number of space debris has also increased the risk of collision with operating satellites, threatening the future of space utilization for commercial and scientific purposes. Space debris refers to abandoned artificial objects in Earth orbit, including expired or faulty satellites, the last stage of launch rockets, various debris generated during the separation of rocket payloads, and other artificial debris. Millions of pieces of space debris pose a serious threat to active spacecraft in Earth orbit. Studies have shown that the risk of the above collisions can be effectively reduced by actively removing large space debris every year. Therefore, active debris removal technology (active debris removal (ADR)) has received increasing attention from the international aerospace community. For example, by launching a tracking spacecraft to rendezvous with the target debris, then connecting with the debris to stabilize the debris, and then dragging it into the target's orbit. At present, the methods of active space debris removal can be divided into non-contact and contact methods. Non-contact: emitting lasers or ion beams to generate force, thereby pushing the target into the expected position; contact: connecting with the debris through a capture mechanism, such as a robotic arm, harpoon, and flying net. Among them, the flying net capture method has the most application prospects because it allows a large distance between the tracking satellite and the target and is compatible with space debris of various sizes and shapes. The space rope net capture system usually combines a free-flying mission platform and a rope net capture device. When the target object (i.e., space debris) is within the effective distance range of the space flying net system capture operation, the flying net is first ejected toward the target, and then gradually unfolded. After contacting and wrapping the target, the net mouth of the flying net is gradually locked, and the target is connected to the mission platform with the help of a tether. The mission platform can drag the target to change its orbit according to the mission requirements. In order to ensure that the space flying net system can efficiently and stably complete the capture mission, it is crucial to prevent the flying net mouth from automatically expanding when closing. Therefore, the development of a reliable flying net mouth tightening device has become a key factor in ensuring the success of the mission. Summary of the invention
[0003] One of the purposes of the present invention is to provide a one-way self-locking device for a rope with small volume, simple structure and reliable function.
[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a one-way self-locking device for a rope, comprising a shell with an inner cavity and a slidable slider arranged in the inner cavity, the front and rear sides of the slider slidingly cooperate with the side wall of the inner cavity, and a gap is left between the upper and lower ends and the side wall of the inner cavity to form a channel for the rope to pass through, and the left and right ends of the shell are provided with rope inlets and outlets connected to the channel, the upper and lower ends of the slider are symmetrical to each other, and the end surfaces of each slider have left and right inclined surfaces with different inclination angles, wherein the inclination angle of the left inclined surface is greater than the inclination angle of the right inclined surface, and the transition area between the inclined surfaces is an outward convex arc shape, and the slider is configured so that when the rope in the channel is pulled to the left, the left end of the slider can be supported by the side wall of the inner cavity, allowing the rope to pass through the channel, and when the rope is pulled to the right, the slider can slide to the right, causing its right inclined surface to approach the side wall of the inner cavity, thereby reducing the channel area on the right side of the slider, clamping the rope, and achieving locking of the rope.
[0005] Furthermore, when the rope in the channel is tightened, the inclined surfaces on both sides of the upper and lower ends of the slider are in friction contact with the rope, and the inclination angle of the left inclined surface is greater than the friction angle, and the inclination angle of the right inclined surface is less than the friction angle, thereby achieving friction self-locking.
[0006] Furthermore, the surface contour of the area on the inner cavity side wall corresponding to the upper and lower ends of the slider matches the surface shape of the upper and lower ends of the slider.
[0007] Furthermore, the front and rear sides of the slider are provided with limiting parts, the inner cavity is provided with limiting grooves at positions corresponding to the limiting parts, and the limiting parts are installed in the corresponding limiting grooves, thereby limiting the slider from sliding in the inner cavity along the left and right directions.
[0008] Furthermore, the projection surface of the rope inlet and outlet along the axial direction thereof is located within the corresponding inclined surface area of the slider.
[0009] Furthermore, when the left end of the slider is against the inner cavity side wall, the distance between the left inclined surface of the slider and the corresponding inner cavity side wall is 1.25 times the rope diameter, and the distance between the right inclined surface of the slider and the corresponding inner cavity side wall is 1.1 times the rope diameter.
[0010] Furthermore, the shell comprises an upper cover and a lower cover which are connected up and down (such as detachably connected), and its inner cavity is divided into two halves (such as equally divided into two halves) and is respectively arranged in the upper cover and the lower cover.
[0011] The second object of the present invention is to provide a flying net closing device, which includes a closing rope and the above-mentioned rope one-way self-locking device, wherein a closing rope is inserted into each of the two channels of the housing, and the closing rope end located at the right end of the housing is used to extend in different directions along the flying net opening and be fixed on the net opening rope of the flying net, and the closing rope end located at the left end of the housing is used to extend in the same direction on the flying net conical surface and be fixed on the conical surface rope of the flying net. By adopting the rope one-way self-locking device, the flying net closing device can prevent the net opening from automatically expanding when closing, effectively improving the reliability of the device.
[0012] The third object of the present invention is to provide a space debris capture device, which includes a flying net formed by interweaving a plurality of ropes and the above-mentioned flying net closing device installed on the flying net, wherein the flying net is in a cone shape (such as a cone or a pyramid) in the unfolded state, and includes a net opening rope located at the opening of the flying net and a conical surface rope located at the conical surface of the flying net, two closing ropes extending from the right end of the shell extend along the opening of the flying net to both sides and are fixed on the net opening ropes, and two closing ropes extending from the left end of the shell extend along the conical surface of the flying net and are fixed on the conical surface ropes. By adopting the flying net closing device including the rope one-way self-locking device, the space debris capture device can ensure that the flying net can be tightly closed when capturing space debris, and prevent the capture failure caused by the accidental opening of the net opening, thereby improving the stability and efficiency of the entire flying net system.
[0013] Furthermore, the cone top of the flying net is connected to a traction rope for connecting to an aircraft or a launcher, and the conical rope connected to the closing rope extends to the outside of the flying net opening and is connected to a bullet.
[0014] The one-way self-locking device for ropes of the present invention has a small size, a simple structure and reliable functions. The device can realize the one-way self-locking function of the rope: when the rope is pulled to the left (i.e., pulled forward), the inner cavity side wall at the left end of the shell can abut against the left end of the slider to prevent the left channel from shrinking or over-shrinking, so that the rope can pass through the channel smoothly; and when the rope is pulled to the right (i.e., pulled backward), the right inclined surface of the slider gradually approaches the inner cavity side wall opposite to it, shrinking the right channel, so that the rope can be clamped and locked. This one-way locking mechanism relies on friction, has a simple principle and is easy to implement, ensuring the reliability of operation. The application of the one-way self-locking device for ropes in the flying net closing device and the space debris capture device can not only improve its reliability, but also provide an effective solution for the space debris capture task. By controlling the tightening of the flying net, the stability and safety of the capture process can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is an exploded view of the one-way self-locking device for the rope; Figure 2 This is the assembly drawing of the one-way self-locking device for the rope; Figure 3 A three-dimensional diagram of a slider of a one-way self-locking device for a rope; Figure 4 It is a three-dimensional diagram of the lower cover of the one-way self-locking device for the rope (the upper cover is symmetrical with the lower cover); Figure 5 Cross-section of a one-way self-locking device for a rope Figure 1 , which contains a slider; Figure 6 Cross-section of a one-way self-locking device for a rope Figure 2 , where the slider is omitted; Figure 7 It is a schematic diagram of the rope in the one-way self-locking device when being pulled forward (pulled to the left); Figure 8 It is a schematic diagram of a rope in a one-way self-locking device when the rope is pulled in the reverse direction (pulled to the right); Fig. 9 This is a schematic diagram of a hexagonal space flying net; Fig.10 This is a morphological diagram of the largest opening of the flying net equipped with a rope one-way self-locking device; Fig.11 This is the state diagram of the rope one-way self-locking device without force applied in Abaqus; Fig.12 This is the state diagram of the rope one-way self-locking device when a 1N force is applied in the positive direction in Abaqus; Fig.13 This is the state diagram of the rope one-way self-locking device when a 1N force is applied in the opposite direction in Abaqus.
[0016] In the figure: 1——housing 1a——inner cavity 1a1——slideway 1a1a——Limiting groove 1c——Channel 1d——Rope inlet and outlet 1e——Upper cover 1f——Lower cover 2——Slider 2a——Left side slope 2b——Right side slope 2c——Transition area 2d——Limiting part 3——Closing rope 3a——Positive end rope 3b——Reverse end rope 4——Flying net 4a——Netting rope 4b——conical rope 4c——traction rope 4d——angle rope 5——Fastener 6——Iron ring. DETAILED DESCRIPTION
[0017] In order to facilitate those skilled in the art to more clearly understand the concept of the present invention, the following is a further description of the present invention in conjunction with the embodiments and drawings. Figure 1-13 .
[0018] like Figure 1-8 As shown, this embodiment provides a one-way self-locking device for a rope, which includes a shell 1 and a slider 2 installed in the shell 1. An inner cavity 1a is provided inside the shell 1, and the slider 2 is installed in the inner cavity 1a and can slide left and right in the inner cavity 1a. The front and rear sides of the slider 2 are slidably matched with the side walls of the inner cavity 1a, usually connected with a gap between surfaces. A gap is left between the upper and lower ends of the slider 2 and the side walls of the inner cavity 1a, forming a channel 1c for the rope to pass through. The size of this channel 1c mainly refers to the distance between the upper and lower end surfaces of the slider 2 and the side walls of the inner cavity 1a opposite thereto, which will change (such as expand or shrink) as the slider 2 moves left and right. The upper and lower ends of the slider 2 are symmetrical and have the same structure, but the left and right ends are not symmetrical. The upper and lower end surfaces are provided with two left and right inclined surfaces with different inclination angles (with the horizontal plane or the symmetric center plane of the slider 2 as the reference datum), wherein the inclination angle of the left inclined surface 2a is greater than the inclination angle of the right inclined surface 2b, and the transition area 2c between the left inclined surface 2a and the right inclined surface 2b is an outward convex arc shape, as can be seen from Figure 5 . In this way, both channels 1c are curved. The one-way self-locking device for the rope mainly utilizes the friction between the rope and the slider 2 when the rope is pulled to drive the slider 2 to slide in the inner cavity 1a, change the size of the channel 1c, and achieve one-way locking of the rope. The side wall of the inner cavity 1a at the left end of the shell 1 abuts against the left end of the slider 2. When the rope is pulled to the left, the slider 2 can be prevented from moving to the left, preventing it from moving to the left or moving too far to the left, thereby avoiding the left channel 1c area from shrinking to the extent that affects the passage of the rope, allowing the rope to pass through the channel 1c smoothly. The left end of the slider 2 can be set to a sharp angle shape to better abut the side wall of the inner cavity 1a and reduce interference with the rope. The working mode of the above device is as follows: when the rope is pulled to the left, the left end of the slider 2 can abut against the side wall of the inner cavity 1a at the left end of the housing 1, allowing the rope to pass through the channel 1c; when the rope is pulled to the right, the slider 2 can slide to the right, so that the right side inclined surface 2b approaches the side wall of the inner cavity 1a opposite to it, shrinking the channel 1c area on the right side of the slider 2, clamping the rope, and locking the rope. In addition, when observing the upper end of the slider 2 from left to right, the left side inclined surface 2a is an upslope inclined surface, and the right side inclined surface 2b is a downslope inclined surface.
[0019] In this embodiment, the left and right ends of the housing 1 are provided with rope inlets and outlets 1d for the rope to enter and exit. For example, the left end of the housing 1 is provided with two upper and lower rope inlets and outlets 1d, and the right end is also provided with two upper and lower rope inlets and outlets 1d. In order to make the rope better contact the upper and lower end surfaces of the slider 2 when passing through the channel 1c, the projection surface of the rope inlet and outlet 1d along its axial direction can be located in the corresponding inclined surface area of the slider 2, so that the rope can directly reach the upper and lower end surfaces of the slider 2 when entering the channel 1c.
[0020] In this embodiment, the surface contour of the area on the side wall of the inner cavity 1a of the housing 1 corresponding to the upper and lower ends of the slider 2 matches the surface shape of the upper and lower ends of the slider 2. Their sizes can be exactly the same, or maintain a certain proportional relationship. This arrangement can help form a channel 1c of uniform size between the slider 2 and the side wall of the inner cavity 1a, which not only facilitates the smooth passage of the rope, but also effectively locks the rope when needed.
[0021] There are many structures for limiting the left and right sliding of the slider 2 in the inner cavity 1a. For example, the front and rear end faces of the slider 2 may be connected to the gap between the side walls of the inner cavity 1a on the front and rear sides of the shell 1, or a limiting structure may be provided between the slider 2 and the inner cavity 1a. The limiting structure includes but is not limited to the following methods: a limiting portion 2d extending left and right (such as a limiting portion with upper and lower protrusions or front and rear protrusions) is provided on the front and rear sides of the slider 2, and a limiting groove 1a1a is provided in the inner cavity 1a at a position corresponding to the limiting portion 2d, and the limiting portion 2d is installed in the corresponding limiting groove 1a1a. The above arrangement can help the slider 2 to move left and right in the inner cavity 1a more stably.
[0022] When the rope is pulled to the left and the left end of the slider 2 abuts against the side wall of the inner cavity 1a at the left end of the shell 1, the size of the channel 1c must be large enough to allow the rope to pass smoothly. Therefore, the distance between the upper and lower end surfaces of the slider 2 and the side wall of the inner cavity 1a opposite thereto should be larger than the diameter of the rope. For example, the distance between the left side inclined surface 2a of the slider 2 and the corresponding side wall of the inner cavity 1a can be set to 1.25 times the diameter of the rope, while the distance between the right side inclined surface 2b of the slider 2 and the corresponding side wall of the inner cavity 1a is 1.1 times the diameter of the rope. This ensures that when the left end of the slider 2 abuts against the side wall of the inner cavity 1a, the width of the channel 1c is large enough to accommodate the rope, and when the slider 2 moves to the right, the width of the channel 1c can be appropriately reduced to achieve the locking of the rope.
[0023] When the two ropes in the channel 1c are tightened, the slider 2 is clamped between the two ropes, and the left and right inclined surfaces at the upper and lower ends of the slider 2 will have frictional contact with the ropes, and the slider 2 will tend to move to the right. Among them, the inclination angle of the left inclined surface 2a is greater than the friction angle, and the inclination angle of the right inclined surface 2b is less than the friction angle.
[0024] When the rope is pulled to the right, since the inclination angle of the left inclined surface 2a is greater than the friction angle, the rope can slide relatively easily on the left inclined surface 2a without generating a significant leftward pushing force on the slider 2. At the same time, since the inclination angle of the right inclined surface 2b is less than the friction angle, the rope sliding on the right inclined surface 2b will encounter a larger friction resistance, thereby generating a rightward pushing force on the slider 2. This unbalanced friction force will cause the slider 2 to move rightward as a whole. This design uses the difference between the inclination angle of the inclined surface and the friction force to control the moving direction of the slider 2.
[0025] Moreover, when the rope is pulled to the right, the asymmetric inclined surface structure of the slider 2 (here, asymmetry in the left and right directions) causes the friction between the right inclined surface 2b (the inclination angle is less than the friction angle) and the rope to increase, pushing the slider 2 to the right, reducing the size of the channel 1c, thereby increasing the contact area between the rope and the slider 2 and the side wall of the inner cavity 1a, and achieving the clamping effect on the rope. In short, by adjusting the position of the slider 2, the size of the channel 1c can be controlled, and then the clamping force of the rope can be adjusted.
[0026] When the rope is pulled to the left, the left side slope 2a of the slider 2 allows the rope to slide relatively easily on it because its inclination angle is greater than the friction angle, so it will not produce a significant rightward pushing force on the slider 2. At the same time, the right side slope 2b of the slider 2 will produce a large friction resistance under the pulling of the rope because its inclination angle is less than the friction angle, and this resistance will push the slider 2 to move to the left. Since the friction force provided by the right side slope 2b is greater than the left side slope 2a, the slider 2 as a whole will show a tendency to move to the left. This movement to the left increases the area of the channel 1c between the right side slope 2b of the slider 2 and the side wall of the inner cavity 1a, reducing the clamping force on the rope, thereby achieving unlocking. In short, when the rope is pulled to the left, the asymmetric slope structure of the slider 2 and the difference in friction force cause the slider 2 to move to the left, releasing the rope and completing the unlocking process.
[0027] In this embodiment, the housing 1 can be an integrated structure, or a detachable split structure that is easier to process and assemble. In order to facilitate production and assembly, the split structure is more preferred. Specifically, Figure 1-2 and Figure 5-8 As shown, the housing 1 is composed of a detachable upper cover 1e and a lower cover 1f, and the inner cavity 1a is divided into two parts (e.g., divided into two equal halves), forming two slide grooves 1a1, which are respectively arranged in the upper cover 1e and the lower cover 1f. The upper cover 1e and the lower cover 1f can be connected and fixed by fasteners 5 (such as bolts, nuts). In this embodiment, the upper cover 1e and the lower cover 1f are symmetrical, and the two slide grooves 1a1 are also symmetrical.
[0028] The one-way locking device of this embodiment has a simple structure, is easy to install, and is suitable for large-scale applications. During the assembly process, the slider 2 is first placed in the slide groove 1a1 of the lower cover 1f, and then the upper cover 1e is connected to the lower cover 1f by bolts, while ensuring that the slider 2 is also located in the slide groove 1a1 of the upper cover 1e. Two curved channels 1c are formed between the slider 2 and the upper and lower covers for the insertion of ropes. Further, the two curved channels 1c in the housing 1 are composed of two straight channels 1c with different inclination angles and a transitional curved channel 1c (such as an arc channel 1c) in the middle. The channel 1c with a large inclination angle is located at the positive end of the device (i.e., the left end of the housing 1), where the channel 1c is wider, the front end of the slider 2 contacts the inner wall of the upper and lower covers, and the inclination angle of the channel 1c is greater than the friction angle; the channel 1c with a small inclination angle is located at the reverse end of the device (i.e., the right end of the housing 1), where the width of the channel 1c is slightly greater than the rope diameter, and the inclination angle is less than the friction angle. The inclination angle of the positive end is much greater than that of the reverse end, which makes the slider 2 tend to move toward the reverse end when the rope is tight, and under the action of friction, the slider 2 can be easily driven to press the rope at the reverse end.
[0029] The one-way self-locking device of the rope of this embodiment can be used for the closing device of the space flying net 4. Specifically, the closing device of the flying net includes a closing rope 3 and a one-way self-locking device of the rope. In the device, a closing rope 3 is inserted into each of the two channels 1c of the shell 1. Among them, the end of the closing rope 3 located at the right end of the shell 1 extends in different directions of the net opening of the flying net 4 and is fixed on the net opening rope 4a of the flying net 4; and the end of the closing rope 3 located at the left end of the shell 1 extends in the same direction of the conical surface of the flying net 4 and is fixed on the conical surface rope 4b of the flying net 4.
[0030] In addition, the flying net closing device including the one-way self-locking device of the rope can also be applied to the space debris capture device. Specifically, the space debris capture device includes a flying net 4 (also called a "rope net") interwoven with a number of ropes and a flying net closing device installed on the flying net 4. The flying net 4 is in a cone shape when unfolded, such as a cone or a pyramid (taking a hexagonal pyramid as an example, the net mouth of the flying net 4 is hexagonal). The flying net 4 includes a net mouth rope 4a located at the net mouth and a conical surface rope 4b located on the conical surface. The two closing ropes 3 extending out of the right end (reverse end) of the shell 1 extend to both sides along the net mouth of the flying net 4 and are fixed on the net mouth rope 4a; while the two closing ropes 3 extending out of the left end (positive end) of the shell 1 extend along the conical surface of the flying net 4 and are fixed on the conical surface rope 4b.
[0031] A traction rope 4c is connected to the top of the cone of the flying net 4, and the traction rope 4c is used to connect to the aircraft or the launcher. At the same time, the conical rope 4b connected to the closing rope 3 extends to the outside of the net opening of the flying net 4, and a bullet is connected to its end. In addition, the part of the conical rope 4b extending to the outside of the net opening is called an angle rope 4d. It is worth noting that the angle rope 4d can be a part of the conical rope 4b or another rope connected to the conical rope 4b alone.
[0032] like Fig. 9 As shown, the housing 1 of the one-way self-locking device is fixed at point C of the flying net 4 (the apex of the net mouth of the flying net 4), and a certain number of small iron rings 6 are used to string the reverse end rope 3b and the net mouth rope 4a together to strengthen the connection between them. The rope passing through the reverse end of the device (which can be called "reverse end rope 3b") is respectively bound to points A1 and A2, which are located on the net mouth rope 4a on both sides of the device. The rope passing through the forward end of the device (which can be called "forward end rope 3a") is all bound to point B, which is located on the conical rope 4b. The same method can also be used to install the other five one-way self-locking devices on the flying net 4. This installation method ensures the stability of the flying net 4 and the consistency of operation.
[0033] like Figure 5 As shown in the figure, the positive end (left end) of channel 1c has a larger inclination angle, while the reverse end (right end) of channel 1c has a smaller inclination angle. When the two ropes are in a taut state, the slider 2 will tend to move toward the reverse end. The state diagram of the rope one-way self-locking device without applying force in Abaqus can be found in Fig.11 , the state diagram of the positive force of 1N in Abaqus can be found in Fig.12 , the state diagram of the reverse application of 1N force in Abaqus can be found in Fig.13 .like Fig.12 As shown, when the two ropes are pulled forward (i.e. pulled to the left), since the slider 2 has a tendency to move toward the reverse end, it is not easily driven forward, and its front end will be supported by the inner walls of the upper and lower covers, so the slider 2 will not be driven by the ropes to press the ropes, and the ropes can slide through the channel 1c when they are pulled forward. Fig.13As shown, when the two ropes are pulled in the opposite direction (i.e., pulled to the right), the slider 2 is easily driven in the opposite direction because it has a tendency to move toward the opposite end, and it will not be supported by the inner walls of the upper and lower covers. Under the action of the initial friction force, the slider 2 will be driven by the rope, causing the opposite end channel 1c (i.e., the right side channel 1c) to narrow, and then press against the rope. Since the inclination angle of the opposite end channel 1c is smaller than the friction angle, the slider 2 will tightly press the rope under the friction force of the two ropes, realizing the reverse self-locking of the rope. This design allows the rope to be effectively locked when pulled in the opposite direction, and can smoothly pass through the channel 1c when pulled in the forward direction.
[0034] like Fig.10 As shown, the closing of the flying net 4 is passively triggered by the impact of the middle conical net on space debris or actively triggered by the tightening of the rear connecting rope. Due to the small area of the conical net, passive triggering of the closing of the net is difficult (high requirements for the launch of the space flying net 4). In order to increase the probability of passive triggering of the closing of the net, the rope at the positive end of each one-way self-locking device can be connected to a suitable position inside the flying net 4 when the net opening of the flying net 4 is at its largest to increase the triggering probability of passive closing of the net.
[0035] When the space flying net 4 is in a contracted state, it is driven by bullets connected to the angle ropes 4d at the six vertices of the net opening. The flying net 4 flies towards the space debris and gradually expands the net opening to its maximum. When the net surface hits the debris, the closing rope 3 passes through the one-way self-locking device and drives the flying net 4 to close in a positive direction. After the net opening is shrunk to the minimum, the net opening will expand due to the collision of the bullets or other external forces, pulling the closing rope 3 in the reverse direction. Pulling the closing rope 3 in the reverse direction will drive the slider 2 of the one-way self-locking device and the inner walls of the upper and lower covers to tighten the rope so that the net opening cannot expand. Then, the space debris is taken away from the orbit under the drive of the traction rope 4c.
[0036] In general, the rope one-way self-locking device of this embodiment has a small size, a simple structure and reliable functions. The device can realize the one-way self-locking function of the rope: when the rope is pulled to the left (i.e., pulled forward), the side wall of the inner cavity 1a at the left end of the housing 1 can abut against the left end of the slider 2, preventing the left channel 1c from shrinking or over-shrinking, so that the rope can pass through the channel 1c smoothly; when the rope is pulled to the right (i.e., pulled backward), the right side inclined surface 2b of the slider 2 gradually approaches the side wall of the inner cavity 1a opposite to it, shrinking the right channel 1c, thereby clamping the rope and achieving locking. This one-way locking mechanism relies on friction, has a simple principle and is easy to implement, ensuring the reliability of operation. The application of the rope one-way self-locking device in the flying net closing device and the space debris capture device can not only improve its reliability, but also provide an effective solution for the space debris capture task. By controlling the tightening of the flying net 4, the stability and safety of the capture process can be enhanced.
[0037] The above embodiments are preferred implementation schemes of the present invention. Any obvious replacements without departing from the concept of the present technical solution are within the protection scope of the present invention.
Claims
1. One-way self-locking device for ropes, characterized by: It comprises a shell (1) having an inner cavity (1a) and a slidable slider (2) disposed in the inner cavity (1a), wherein the front and rear sides of the slider (2) are slidably matched with the side wall of the inner cavity (1a), and a gap is left between the upper and lower ends of the slider and the side wall of the inner cavity (1a) to form a passage (1c) for the passage of a rope, and the left and right ends of the shell (1) are provided with a rope inlet and outlet (1d) connected to the passage (1c), and the upper and lower ends of the slider (2) are symmetrical to each other and each end surface has two left and right inclined surfaces with different inclination angles, wherein the inclination angle of the left inclined surface (2a) is greater than the inclination angle of the right inclined surface (2b), and the transition area (2c) between the inclined surfaces is in the shape of an outward convex arc; The slider (2) is configured such that when the rope in the channel (1c) is pulled to the left, its left end can be abutted by the side wall of the inner cavity (1a), allowing the rope to pass through the channel (1c); and when the rope is pulled to the right, it can slide to the right, causing its right side inclined surface (2b) to approach the side wall of the inner cavity (1a), thereby reducing the channel (1c) area on the right side of the slider (2), clamping the rope, and locking the rope.
2. The one-way self-locking device for a rope according to claim 1, characterized in that: When the rope in the channel (1c) is tightened, the inclined surfaces on both sides of the upper and lower ends of the slider (2) are in frictional contact with the rope, and the inclination angle of the left inclined surface (2a) is greater than the friction angle, and the inclination angle of the right inclined surface (2b) is less than the friction angle.
3. The one-way self-locking device for a rope according to claim 1, characterized in that: The surface contour of the area on the side wall of the inner cavity (1a) corresponding to the upper and lower ends of the slider (2) matches the surface shape of the upper and lower ends of the slider (2).
4. The one-way self-locking device for a rope according to claim 1, characterized in that: The front and rear sides of the slider (2) are provided with limiting portions (2d), the inner cavity (1a) is provided with limiting grooves (1a1a) at positions corresponding to the limiting portions (2d), and the limiting portions (2d) are installed in the corresponding limiting grooves (1a1a).
5. The one-way self-locking device for a rope according to claim 1, characterized in that: The projection surface of the rope inlet and outlet (1d) along its axial direction is located in the corresponding inclined surface area of the slider (2).
6. The one-way self-locking device for a rope according to claim 1, characterized in that: When the left end of the slider (2) abuts against the side wall of the inner cavity (1a), the distance between the left inclined surface (2a) of the slider (2) and the corresponding side wall of the inner cavity (1a) is 1.25 times the diameter of the rope, and the distance between the right inclined surface (2b) of the slider (2) and the corresponding side wall of the inner cavity (1a) is 1.1 times the diameter of the rope.
7. The one-way self-locking device for a rope according to claim 1, characterized in that: The shell (1) comprises an upper cover (1e) and a lower cover (1f) connected up and down, and its inner cavity (1a) is divided into two halves and is arranged in the upper cover (1e) and the lower cover (1f).
8. The flying net closing device is characterized by: It comprises a closing rope (3) and a rope one-way self-locking device as described in any one of claims 1 to 7, wherein a closing rope (3) is respectively inserted into two channels (1c) of the shell (1), and the end of the closing rope (3) located at the right end of the shell (1) is used to extend in different directions and be fixed on the net mouth rope (4a) of the flying net (4), and the end of the closing rope (3) located at the left end of the shell (1) is used to extend in the same direction and be fixed on the conical rope (4b) of the flying net (4).
9. A space debris capture device, characterized in that: The invention comprises a flying net (4) and a flying net closing device as claimed in claim 8 installed on the flying net (4), wherein the flying net (4) is cone-shaped in the unfolded state, and comprises a net opening rope (4a) located at the net opening of the flying net (4) and a conical surface rope (4b) located at the conical surface of the flying net (4), two closing ropes (3) extending out of the right end of the shell (1) extend along the net opening of the flying net (4) to both sides and are fixed on the net opening ropes (4a), and two closing ropes (3) extending out of the left end of the shell (1) extend along the conical surface of the flying net (4) and are fixed on the conical surface ropes (4b).
10. The space debris capture device according to claim 9, characterized in that: The conical top of the flying net (4) is connected to a traction rope (4c) for connecting to an aircraft or a launcher, and the conical rope (4b) connected to the closing rope (3) extends to the outside of the net opening of the flying net (4) and is connected to a bullet.