Hot knife unlocking mechanism and satellite

Abstract

The invention relates to the field of pressing unlocking mechanisms, in particular to a hot knife unlocking mechanism and a satellite. The heat knife unlocking mechanism comprises a rope which penetrates through the first component and the second component and is locked; the first device comprises a first shell used for being fixed with the first component; the first fixing part is arranged in the first shell and connected with the first end of the rope; the at least two hot knife assemblies are oppositely arranged, and knife bars of the hot knife assemblies abut against the two sides of the rope respectively; the second device comprises a second shell used for being fixed with a second component; and the pre-tightening adjusting assembly is connected with the second end of the rope, is arranged on the second shell and can move to adjust the tension of the rope. The locking device can be connected with a component to be locked or unlocked through the first device and the second device, locking is conducted through a rope, the pre-tightening adjusting assembly adjusts the rope to change tension, and pressing force can be changed during locking. The rope is fused through the hot knife assembly to unlock and separate all parts, impact force is small, safety is high, the structure is compact, occupied space is small, and installation and rope replacement are convenient.

Description

Technical Field

[0001] The invention relates to the field of compression unlocking mechanisms, and in particular to a hot knife unlocking mechanism and a satellite. Background Art

[0002] For the locking and separation components, the locking and separation components are generally compressed and fixed and unfolded through a compression and unlocking mechanism. The compression and unlocking mechanism is generally fixed by pyrotechnics, but the pyrotechnics will produce a large impact during the unlocking process, which is difficult to adapt to occasions where the separation impact requirement is small. After completing one unlocking, the process of re-compressing the expandable components, re-installing the locking and separation components, and replacing the pyrotechnics is relatively complicated. It is difficult to adjust the compression force of the locking and separation components by using pyrotechnics to achieve compression and unlocking. In addition, the locking and separation components occupy a large space and are difficult to install. Summary of the invention

[0003] To overcome the problems existing in the related art, an exemplary embodiment of the present disclosure provides a hot knife unlocking mechanism for locking or unlocking a first component and a second component, the hot knife unlocking mechanism comprising: a rope, which is arranged to pass through the first component and the second component, and the first component and the second component are locked by the rope; a first device, which is used to be fixedly connected to the first component, comprising: a first shell, which is used to be fixed to the first component; a first fixing portion, which is fixed to the first shell and connected to the first end of the rope; a hot knife assembly, which is arranged inside the first shell, and the knife bar of the hot knife assembly abuts against the rope; a second device, which is used to be fixedly connected to the second component, comprising: a second shell, which is used to be fixed to the second component; a pre-tensioning adjustment assembly, which is connected to the second end of the rope, and the pre-tensioning adjustment assembly is arranged in the second shell and can move in a direction close to or away from the first device to adjust the tension of the rope.

[0004] In some embodiments, a mounting hole is formed on the top surface of the second shell, and a accommodating cavity is formed on the inner side of the mounting hole; the preload adjustment assembly includes: a hollow screw, the lower part of which is arranged in the accommodating cavity, and the upper part extends outward from the mounting hole, and is connected to the second shell in a manner that it can move axially along the hollow screw; a second fixing part, which is arranged on the top of the hollow screw and is connected to the second end of the rope; an adjusting nut, which is sleeved on the outer side of the hollow screw, and the bottom end abuts against the top surface of the second shell, and is used to make the hollow screw move axially to adjust the tension of the rope.

[0005] In some embodiments, the second fixing portion includes: a second fixing pin, both ends of which are connected to the side walls of the hollow screw; and the second end of the rope is sleeved on the second fixing pin.

[0006] In some embodiments, a plane extending in the axial direction is formed on the outer peripheral surface of one side of the hollow screw, and the plane cooperates with the mounting hole to prevent the hollow screw from rotating.

[0007] In some embodiments, the second shell includes: a clamping seat for fixedly connecting with the second component; a limiting cover, which forms the mounting hole, and the limiting cover is detachably fixedly connected with the clamping seat and forms the accommodating cavity for accommodating part of the hollow screw.

[0008] In some embodiments, the first fixing portion also includes: a steering pin, which is arranged at the bottom of the first shell and is located below the axial direction of the hollow screw; a first fixing pin, both ends of which are fixedly connected to the bottom of the first shell, located on the side of the steering pin and arranged parallel to the steering pin; the first end of the rope is sleeved on the first fixing pin.

[0009] In some embodiments, the first shell also includes: at least two guide holes arranged on the side of the rope; the hot knife assembly includes: a knife holder for fixing the knife rod; a guide rod fixedly arranged on the back side of the knife holder, passing through the guide hole, and capable of being moved axially along the guide hole; a spring, sleeved on the guide rod, one end of which abuts against the back side of the knife holder, and the other end abuts against the first shell, for making the knife rod abut against the rope.

[0010] In some embodiments, the guide rod is formed with a first limiting hole along the radial direction of the guide rod; the first shell is formed with a second limiting hole axially parallel to the first limiting hole; the hot knife unlocking mechanism also includes: a limiting pin, which is used to pass through the first limiting hole and the second limiting hole during the process of assembling the hot knife assembly to the first shell to limit the position of the guide rod.

[0011] In some embodiments, there are two hot knife assemblies, and the two hot knife assemblies are in a master-standby relationship and operate independently; the two hot knife assemblies are arranged opposite to each other, and the knife bars of the two hot knife assemblies are respectively abutted against the two sides of the rope.

[0012] In some embodiments, a concave portion is formed on the top surface of the first shell; and a convex portion cooperating with the concave portion is formed on the bottom surface of the second shell for limiting radial movement of the first shell and the second shell.

[0013] In some embodiments, the hot knife unlocking mechanism also includes: one or more hollow conduits, which are used to be fixedly connected to one or more third components located between the first component and the second component, and the rope passes through the hollow conduits; wherein the top surface of the hollow conduit is formed with a conduit recess that cooperates with the protrusion; and the bottom surface of the hollow conduit is formed with a conduit protrusion that cooperates with the concave portion.

[0014] In a second aspect, the present disclosure also provides a satellite, comprising: a satellite body; one or more solar panels, arranged on the side of the satellite body; a hot knife unlocking mechanism as described in any of the above embodiments, wherein the first shell is fixedly connected to the satellite body, and the second shell is fixedly connected to one of the solar panels, for locking or unlocking the satellite body and the solar panel to unfold the solar panel.

[0015] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0016] The hot knife unlocking mechanism provided by the present disclosure can be connected to the first component and the second component to be locked or unlocked through the first device and the second device respectively, the first component and the second component can be locked through the rope, and the pre-tightening adjustment component can be used to pre-tighten the rope to change the tension of the rope, so that the pressing force on the first component and the second component can be changed during the process of locking the first component and the second component; the rope can be melted by the hot knife component to achieve the unlocking and separation of the first component and the second component, the impact force of the separation process is small, and there is higher safety. The hot knife unlocking mechanism provided by the present disclosure has a relatively compact structure, occupies a small space, and is convenient for the installation of the locking and separation components and the replacement of the rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention may be better understood by describing exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A cross-sectional view of a hot knife unlocking mechanism according to an exemplary embodiment of the present disclosure;

[0019] Figure 2 A three-dimensional diagram of a hot knife unlocking mechanism according to an exemplary embodiment of the present disclosure;

[0020] Figure 3 A top view of a hot knife unlocking mechanism shown as an exemplary embodiment of the present disclosure;

[0021] Figure 4 A schematic diagram of the structure of a hot knife assembly of a hot knife unlocking mechanism shown in an exemplary embodiment of the present disclosure;

[0022] Figure 5 A schematic diagram of a rope of a hot knife unlocking mechanism according to an exemplary embodiment of the present disclosure;

[0023] Figure 6 A circuit diagram of a hot knife unlocking mechanism shown in an exemplary embodiment of the present disclosure;

[0024] Figure 7It is a front view of a hot knife unlocking mechanism shown as an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described below. It should be noted that in the specific description of these embodiments, in order to provide a concise description, it is impossible for this specification to provide a detailed description of all the features of the actual embodiments. It should be understood that in the actual implementation of any embodiment, just as in the process of any engineering project or design project, in order to achieve the specific goals of the developer and to meet system-related or business-related restrictions, various specific decisions are often made, and this will also change from one embodiment to another. In addition, it can also be understood that although the efforts made in this development process may be complex and lengthy, for ordinary technicians in the field related to the content disclosed by the present invention, some changes such as design, manufacturing or production based on the technical content disclosed in this disclosure are just conventional technical means, and should not be understood as insufficient content of this disclosure.

[0026] Unless otherwise defined, the technical or scientific terms used in the claims and the specification shall have the usual meaning understood by persons with ordinary skills in the technical field to which the invention belongs. The words "first", "second" and similar words used in the patent application specification and the claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "One" or "one" and other similar words do not indicate a quantitative limitation, but indicate the existence of at least one. "Include" or "comprises" and other similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalent elements, and do not exclude other elements or objects. "Connected" or "connected" and other similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0027] For the locking and separation components, the pressing and fixing as well as the unlocking and unfolding are generally achieved through a pressing and unlocking mechanism. In some technologies, a pyrotechnic unlocking mechanism is generally selected, and the locking and separation components are pressed and fixed and unlocked and unfolded through pyrotechnics such as explosive bolts or pin pullers. For example, the locking and separation components are fixed by explosive bolts. When the locking and separation components need to be unlocked and unfolded, the gunpowder inside the explosive bolts can be detonated to break the explosive bolts, thereby releasing the lock on the locking and separation components and allowing the locking and separation components to unfold. However, since the pyrotechnic unlocking mechanism is prone to generate a large impact force during the unlocking process, it is easy to cause damage to the locking and separation components with poor impact resistance and the workpieces connected thereto, resulting in poor safety.

[0028] In order to overcome the problems existing in the related art, an exemplary embodiment of the present disclosure provides a hot knife unlocking mechanism for locking or unlocking a first component and a second component, such as Figure 1 , Figure 2 As shown, the hot knife unlocking mechanism may include: a rope 30 , a first device 10 and a second device 20 .

[0029] The rope 30 is arranged to pass through the first component and the second component, and the first component and the second component are locked by the rope 30. The first component and the second component can be locked by the rope 30. The first component and the second component can be provided with a through hole for the rope 30 to pass through, and the rope 30 can pass through the through holes of the first component and the second component, so that the first component and the second component can be connected by the rope 30, and the first component and the second component can be fixed by tensioning the rope 30, and the rope 30 can be cut to separate the first component and the second component. The rope 30 can be a Dyneema fiber bundle, or it can be woven from a plurality of Dyneema fiber bundles. The fiber bundle can be woven into a rope 30 with a larger diameter to ensure that the tension of the rope 30 can lock the first component and the second component, and it is not easy to break. The first component and the second component can be a locking and separating component, and the first component can be the main body of the locking and separating component, and it does not fold or move during the locking process and the separating process, and the second component can be a folding member, and the second component can be in an unfolded state without the action of external force, and can be folded under the action of the pressing force. The second component can be folded and a locking force can be applied to the second component through a hot knife unlocking mechanism to lock the second component to the first component. When the second component needs to be unfolded, the hot knife unlocking mechanism can be unlocked to allow the folded component to be unfolded. The first component can be a fixed component such as a base or a component with a larger volume or weight relative to the second component to ensure stability during the locking and separation process; the second component can be a foldable thin plate or other components that can facilitate the fixing of the first device so that the rope passes through the inside of the second component and provides a pressing force for the second component. The first component can be a satellite, and the second component can be a solar panel installed on the side of the satellite. Before the satellite is launched, the solar panel needs to be folded and locked to the satellite. The satellite and the solar panel can be locked by the hot knife unlocking mechanism to reduce the volume and facilitate the launch of the satellite; when the satellite enters orbit after launch, the solar panel needs to be unfolded so that the solar panel can better absorb sunlight and power the satellite. The rope can be melted by the hot knife to unlock the hot knife unlocking mechanism to unfold the solar panel.

[0030] The first device 10 is used for being fixedly connected to the first component. The first device 10 can be fixedly connected to the first component by screws. The first device 10 may include: a first shell 11 , a first fixing portion 12 and at least two hot knife assemblies 13 .

[0031] The first shell 11 is used to be fixed to the first component. The first shell 11 can be used to accommodate and install the first fixing part 12 and at least two hot knife assemblies 13. The first shell 11 can be provided with a through hole in the vertical direction, which is used for the rope 30 to pass through the through hole inside the first shell 11, so that the rope 30 can pass through the first component connected and fixed to the first shell 11, so as to achieve locking and unlocking of the first component and the second component. The first shell 11 can be fixedly connected to the first component, and the first shell 11 can be provided with a threaded hole, which is used to fix the first shell 11 and the first component by screws. Among them, the vertical direction can be the separation direction of the first shell 11 and the second shell 21 when unlocking, that is, the direction in which the rope 30 extends.

[0032] The first fixing portion 12 is fixed to the first shell 11 and connected to the first end of the rope 30; the first fixing portion 12 can be used to fix the rope 30, the first fixing portion 12 can be arranged inside the first shell 11, the first fixing portion 12 can be detachably fixedly connected to the first shell 11, the first fixing portion 12 can be connected to the first end of the rope 30, so that the rope 30 can be tensioned inside the first shell 11 and the second shell 21 to lock the first component and the second component. When the rope 30 is cut by the hot knife assembly 13 to separate and unlock the first device 10 and the second device 20, if it is necessary to lock the first device 10 and the second device 20 again, the first fixing portion 12 can be removed from the first shell 11, and after replacing the rope 30, the first fixing portion 12 can be installed to the first shell 11 again, thereby realizing the replacement of the rope 30, and the operation is simple and quick. The first fixing portion 12 can also be partially disposed on the outside of the first shell 11. The first end of the rope 30 is connected to the first fixing portion 12, so that the first end of the rope 30 can be located outside the first shell 11, thereby providing a larger observation space and operating space during the installation or removal of the rope 30, so as to facilitate the installation and removal of the rope 30.

[0033] The hot knife assembly 13 is arranged inside the first housing 11, and the knife bar 131 of the hot knife assembly 13 abuts against the rope 30. The hot knife assembly can be arranged inside the first housing 11, and is used to heat to melt the rope 30, so as to achieve the unlocking of the first component and the second component. The hot knife assembly 13 can translate in the first housing 11, so that the knife bar 131 can move and finally abut against one side of the rope 30. When it is necessary to unlock the hot knife unlocking mechanism, the knife bar 131 can be heated so that the knife bar 131 can melt the rope, and the first device 10 is separated from the second device 20, so that the first component and the second component are unlocked.

[0034] In other embodiments, there may be two hot knife assemblies 13, the two hot knife assemblies 13 are in a master-slave relationship and operate independently; the two hot knife assemblies 13 are arranged opposite to each other, and the blade bars 131 of the two hot knife assemblies 13 are respectively in contact with the two sides of the rope 30. At least two hot knife assemblies 13 may be arranged in the first housing 11, the two hot knife assemblies 13 may be in a master-slave relationship, the main hot knife assembly may be operated preferentially during the unlocking process, when the main hot knife assembly can melt the rope 30 to achieve unlocking, the standby hot knife assembly may not be heated; when the main hot knife assembly fails to completely melt the rope 30, the standby hot knife assembly may be operated to heat the standby hot knife assembly and melt the rope 30 to achieve unlocking of the first component and the second component. Through the two hot knife assemblies 13 in a master-slave relationship, the hot knife unlocking mechanism can avoid being stuck in unlocking and unable to unlock, and the unlocking efficiency can be improved. The hot knife assemblies 13 can be arranged on both sides of the rope 30, and the two hot knife assemblies 13 can be arranged opposite to each other in the first shell 11, so that the knife rods 131 of each hot knife assembly 13 are arranged in a direction close to the rope 30, so that the knife rods 131 of the two hot knife assemblies 13 can abut against both sides of the rope 30. By heating the knife rods 131, the hot knife assembly 13 can melt the rope 30 to achieve unlocking of the first component and the second component.

[0035] The second device 20 is used to be fixedly connected to the second component. The second device 20 may be an embedded part, which can be embedded in the second component during the processing of the second component to achieve the installation and fixation of the second device 20 and the second component. The second device 20 may include: a second housing 21 and a preload adjustment component 22.

[0036] The second housing 21 is used to be fixed to the second component; the second housing 21 can be fixed to the second component, and the second housing 21 can be an embedded part, fixedly installed in the second component. The second housing 21 can be used to install or accommodate the preload adjustment component 22 and the rope 30. The second housing 21 can be provided with a through hole in the vertical direction, so that the rope 30 can pass through the through hole inside the second housing 21, so that the rope 30 can pass through the second component connected and fixed to the second housing 21, so as to realize the locking and unlocking of the first component and the second component.

[0037] The pre-tensioning adjustment component 22 is connected to the second end of the rope 30. The pre-tensioning adjustment component 22 is disposed in the second housing 21 and can move in a direction close to or away from the first device 10 to adjust the tension of the rope 30. The pre-tensioning adjustment component 22 can move in a vertical direction so that the pre-tensioning adjustment component 22 is close to or away from the first device 10. When the pre-tensioning adjustment component 22 moves in a direction away from the first device 10, the second end of the rope 30 fixed to the pre-tensioning adjustment component 22 is pulled in a direction away from the first device 10, so that the rope 30 is tensioned, thereby increasing the pressing force of the rope 30 on the first component and the second component, so that the first component and the second component remain in a locked state under a larger locking force. When the pre-tensioning adjustment component 22 moves in a direction close to the first device 10, the second end of the rope 30 fixed to the pre-tensioning adjustment component 22 is pulled in a direction close to the first device 10, so that the rope 30 is relatively loosened, thereby reducing the pressing force of the rope 30 on the first component and the second component, so that the first component and the second component remain in a locked state under a smaller locking force. The preload adjustment assembly 22 can be detachably arranged in the second shell 21. After the hot knife assembly 13 melts the rope 30 to unlock and separate the first component and the second component, when the first component and the second component need to be locked again, the preload adjustment assembly 22 can be removed from the second shell 21 and the rope 30 can be replaced, which facilitates the replacement of the rope 30.

[0038] Through the hot knife unlocking mechanism of this embodiment, the first component and the second component can be locked and unlocked through the rope 30. The rope 30 can be stretched through the pre-tightening adjustment component 22 to change the tension of the rope 30, so as to adjust the locking force of the first component and the second component to adapt to a variety of different working conditions and provide corresponding pressing force. By melting the rope 30 through the hot knife component 13 to unlock the first component and the second component, it is possible to avoid the use of a hot workpiece, thereby avoiding the impact and damage to the components during the unlocking process, and having higher safety. The cost of the rope 30 is low, which can reduce the cost of the hot knife unlocking mechanism, and the rope 30 is replaceable. After the hot knife component 13 melts the rope 30 to complete one unlocking, the first component and the second component can be locked again by replacing the rope 30. The replacement process is simple and easy to replace, which can improve work efficiency. Through the pre-tensioning adjustment component 22, the pre-tensioning adjustment component 22 can be moved axially away from or close to the first device 10, so that the rope 30 connected to the pre-tensioning adjustment component 22 can be stretched with the movement of the pre-tensioning adjustment component 22, changing the tension of the rope 30, thereby realizing the adjustment of the locking force of the first component and the second component to adapt to a variety of different working conditions.

[0039] In some embodiments, Figure 1 , Figure 2As shown, a mounting hole may be formed on the top surface of the second shell 21 , and a receiving cavity may be formed inside the mounting hole of the second shell 21 ; the preload adjustment assembly 22 may include: a hollow screw 221 , a second fixing portion 222 and an adjustment nut 223 .

[0040] The hollow screw 221 has a lower portion disposed in the accommodating cavity, and an upper portion extending outward from the mounting hole, and is connected with the second housing 21 in a manner that the hollow screw 221 can be moved axially along the hollow screw 221. The through hole in the center of the hollow screw 221 can be used for the rope 30 to pass through, and the hollow screw 221 can be disposed in the mounting hole, and the upper portion extends outward from the mounting hole. The size of the mounting hole can match the outer diameter of the hollow screw 221. The lower portion of the hollow screw 221 can extend outward to form a platform, and the outer diameter of the platform portion matches the inner diameter of the accommodating cavity, so that the lower portion of the hollow screw 221 can be disposed in the accommodating cavity, and the hollow screw 221 can be translated up and down along its axial direction. The outer diameter of the platform formed at the lower portion of the hollow screw 221 is larger than the inner diameter of the mounting hole, so that the movement of the hollow screw 221 along its axial direction can be limited by the mounting hole. The hollow screw 221 can move axially and cooperate with the second housing 21. The outer peripheral side of the hollow screw 221 can be threaded to facilitate cooperation with the adjustment nut 223. There is no relative rotation between the hollow screw 221 and the second housing 21. The hollow screw 221 can be translated up and down in the accommodating cavity by rotating the adjustment nut 223, so that only relative translation occurs between the hollow screw 221 and the second housing 21. The movement stroke of the hollow screw 221 can be limited by the mounting hole on the top surface of the second housing 21, and the position of the hollow screw 221 before and after unlocking can be guaranteed, so as to avoid large displacement of the hollow screw 221.

[0041] The second fixing portion 222 is disposed at the top of the hollow screw 221 and connected to the second end of the rope 30. The second fixing portion 222 can be detachably fixed to the top of the hollow screw 221. When the rope 30 is cut by the hot knife assembly 13 to separate and unlock the first device 10 and the second device 20, if it is necessary to lock the first device 10 and the second device 20 again, the second fixing portion 222 can be removed from the second housing 21, and the second fixing portion 222 can be installed on the second housing 21 again after the rope 30 is replaced, thereby realizing the replacement of the rope 30. The second fixing portion 222 can be connected to the second end of the rope 30, so that the rope 30 can be tensioned inside the first housing 11 and the second housing 21 to lock the first component and the second component. By moving the hollow screw 221 in its axial direction, the second fixing portion 222 can be moved closer to or away from the first housing 11, thereby changing the tension of the rope 30 connected to the second fixing portion 222. When the hollow screw 221 is translated in the axial direction away from the first housing 11, the second fixing portion 222 can be moved away from the second housing 21, the distance between the first fixing portion 12 and the second fixing portion 222 can be longer, and the distance between the two ends of the fixing rope 30 can be farther, so that the rope 30 is tensioned, the pressing force of the rope 30 on the first component and the second component is increased, and the first component and the second component are kept in a locked state under a larger locking force. When the hollow screw 221 is translated in the axial direction toward the first housing 11, the second fixing portion 222 can be moved closer to the second housing 21, the distance between the first fixing portion 12 and the second fixing portion 222 can be shorter, and the distance between the two ends of the fixing rope 30 can be closer, so that the rope 30 is relatively loosened, the pressing force of the rope 30 on the first component and the second component is reduced, and the first component and the second component are kept in a locked state under a smaller locking force.

[0042] The adjusting nut 223 is sleeved on the outside of the hollow screw 221, and the bottom end thereof abuts against the top surface of the second housing 21, and is used to make the hollow screw 221 move axially to adjust the tension of the rope 30. The adjusting nut 223 may be provided with an internal thread, which cooperates with the external thread of the hollow screw 221. The adjusting nut 223 is sleeved on the outside of the hollow screw 221 and the bottom end of the adjusting nut 223 abuts against the top surface of the second housing 21. By rotating the adjusting nut 223, the hollow screw 221 can be translated along the axis in a direction away from or close to the second housing 21, thereby changing the relative position of the hollow screw 221 and the second housing 21, so that the distance between the first end and the second end of the rope 30 connected to the second fixing portion 222 increases or decreases, thereby changing the tension of the rope 30.

[0043] Through the hot knife unlocking mechanism provided in this embodiment, the second end of the rope 30 is connected to the second fixing part 222. Through the detachable second fixing part 222 on the hollow screw 221, the installation and removal of the rope 30 can be made simpler, and the installation and removal of the rope 30 are convenient, so as to realize the locking and fixing of the hot knife unlocking assembly and improve the unlocking and separation efficiency. Through the hollow screw 221 and the adjusting nut 223, the hollow screw 221 can achieve axial translation through the rotation of the adjusting nut 223, so that the second fixing part 222 is translated accordingly, driving the rope 30, thereby stretching the rope 30 to change the tension of the rope 30. The tension of the rope 30 can be adjusted to change the locking force of the hot knife unlocking mechanism on the first component and the second component in the locked state, so as to adapt to different working conditions and meet different locking force requirements. According to the hot knife unlocking mechanism provided in this embodiment, the hollow screw 221 can be translated axially through the hollow screw 221 and the adjusting nut 223, driving the second fixing part 222 to translate axially to change the deformation of the rope 30 being stretched, thereby changing the tension of the rope 30. Since the second component can be a foldable plate-like component, for the second component with a larger thickness, a larger pressing force needs to be provided to achieve locking. Therefore, the hollow screw 221 can be translated axially away from the first device 10 by adjusting the nut 223, so that the rope 30 is stretched and deformed, and the deformation increases, thereby making the tension of the rope 30 larger, and providing a larger tension for the second component. For the second component with a smaller thickness, only a smaller pressing force needs to be provided to achieve locking. Therefore, the hollow screw 221 can be translated axially close to the first device 10 by adjusting the nut 223, and the deformation of the rope 30 being stretched is reduced, so that the rope 30 can provide a smaller tension for the second component.

[0044] In some embodiments, Figure 1As shown, the second fixing part 222 may include: a second fixing pin, both ends of which are connected to the side wall of the hollow screw 221; and the second end of the rope 30 is sleeved on the second fixing pin. The second fixing part 222 may include a second fixing pin, both ends of which may be connected to the side wall of the hollow screw 221, so that the second fixing pin is arranged along the radial direction of the hollow screw 221, and the second fixing pin is detachably mounted on the top of the hollow screw 221. A mounting ring may be formed on the second end of the rope 30, and the mounting ring of the rope 30 may be sleeved on the second fixing pin to fix the rope 30. During the installation of the hot knife unlocking device, the second fixing pin may be installed on the top side wall of the hollow screw 221 after passing through the mounting ring of the rope 30, so that the second fixing pin is connected to the second end of the rope 30. After the second fixing pin is installed on the top of the hollow screw 221, the second fixing pin may be fixed to the hollow screw 221 by adhesive tape or other means to ensure the stability of the second fixing pin installed on the hollow screw 221. Through the second fixing pin of the present embodiment, it can be detachably mounted on the hollow screw 221, so that the fused rope 30 can be quickly and conveniently removed after each unlocking is completed, and when the first component and the second component need to be locked and fixed again, the rope 30 can be easily replaced, and the hot knife unlocking device can be quickly restored to the locked state, so as to improve the efficiency of replacing the rope 30 of the hot knife unlocking mechanism.

[0045] In some embodiments, Figure 1As shown, a plane extending in the axial direction is formed on the outer circumference of one side of the hollow screw 221, and the plane cooperates with the mounting hole to prevent the hollow screw 221 from rotating. A plane extending in the axial direction can be formed on the outer circumference of one side of the hollow screw 221, so that the radial cross section of the hollow screw 221 is D-shaped, and the shape of the mounting hole cooperates with the hollow screw 221, so that the radial cross section of the mounting hole and the radial cross section of the hollow screw 221 are both D-shaped. The plane formed by the outer circumference of the hollow screw 221 makes the outer cross section of the hollow screw 221 no longer circular, and the hollow screw 221 cooperates with the mounting hole so that the hollow screw 221 cannot rotate. The hollow screw 221 can only be moved axially close to or away from the second housing 21 by adjusting the rotation of the nut 223 to prevent the hollow screw 221 from rotating, thereby preventing the rope 30 connected to the second fixing pin on the hollow screw 221 from twisting, thereby improving the stability and safety of the hot knife unlocking device. Through the plane on one side of the hollow screw 221 of this embodiment, the cross section of the hollow screw 221 can be made irregular, so that the hollow screw 221 cannot rotate in the installation hole and can only translate along the axial direction, which can prevent the second fixing part 222 at the top of the hollow screw 221 from rotating, and ensure that the second fixing part 222 can only translate along the axial direction with the hollow screw 221, and prevent the second fixing part 222 from rotating while translating along the axial direction. The rope 30 is fixed to the second fixing part 222. If the hollow screw 221 rotates, the second fixing part 222 rotates with the hollow screw 221, and the rope 30 twists with the rotation of the second fixing part 222. When the hollow screw 221 moves axially in a direction away from the second housing 21, if it rotates at the same time, the second fixing portion 222 moves with the hollow screw 221, so that the rope 30 is stretched and tensioned, and rotates at the same time so that the rope 30 is twisted, so that it is subjected to torsional stress and tensile stress at the same time, resulting in local stress concentration and causing the rope 30 to break. Through this embodiment, the rotation of the hollow screw 221 can be avoided, and the rope 30 can be avoided from breaking, so as to ensure the safety of the rope 30 and improve the safety of the hot knife unlocking device.

[0046] In some embodiments, Figure 1As shown, the second housing 21 may include: a pressing seat 211, which is used to be fixedly connected with the second component; a limiting cover 212, which is formed with a mounting hole, and the limiting cover 212 is detachably fixedly connected with the pressing seat 211 and is formed with a receiving cavity for receiving part of the hollow screw 211. The bottom of the pressing seat 211 can be abutted with the first housing 11, and a through hole for the rope 30 to pass through can be opened in the center of the pressing seat 211 along the axial direction, so as to facilitate the pressing and fixing of the first housing 11 and the second housing 21. Since the second housing 21 can be an embedded part, which is installed and fixed in the second component, the surrounding side of the pressing seat 211 can be provided with a docking structure for matching with the second component, so as to be installed in the second component. The limiting cover 212 can be arranged on the top of the pressing seat 211, and the pressing seat 211 and the limiting cover 212 can be fixed by screws to prevent the limiting cover 212 and the pressing seat 211 from relative movement. The limiting cover 212 can be formed with a mounting hole for installing the preload adjustment component 22. The limiting cover 212 and the pressing seat 211 can be detachably fixedly connected and can form a receiving chamber, which can be used to receive part of the hollow screw 221, so that the lower part of the hollow screw 221 can be arranged in the receiving chamber, and the hollow screw 221 can be moved up and down axially in the receiving chamber, and a mounting hole is provided at the top of the receiving chamber, so that the upper part of the hollow screw 221 can pass through the mounting hole to the outside of the second shell 21, and the size of the mounting hole can be smaller than the size of the receiving chamber, and the size of the mounting hole can match the size of the outer circumference of the hollow screw 221, so that the hollow screw 221 can pass through the mounting hole. The distance that the hollow screw 221 can move up and down in the receiving chamber is limited by the pressing seat 211 and the limiting cover 212, and the distance can be 3-8mm, and the distance that the hollow screw 221 can move up and down in the receiving chamber can be determined according to the first component and the second component. Since the lower part of the hollow screw 221 can extend to the circumferential side to form a platform, the size of the accommodating cavity can be set according to the platform, so that the accommodating cavity can cooperate with the platform, so that the hollow screw 221 can move axially in the accommodating cavity. Through the pressing seat 211 and the limiting cover 212 of this embodiment, the axial movement of the hollow screw 221 can be limited, thereby limiting the axial movement of the second fixing part 222 provided at the top of the hollow screw 221, so as to change the tension of the rope 30, thereby adjusting the locking force when the first component and the second component are locked.

[0047] In some embodiments, Figure 5As shown, the first fixing part 12 may further include: a steering pin 121, which is arranged at the bottom of the first housing 11 and is located below the hollow screw 221 in the axial direction; a first fixing pin 122, both ends of which are fixedly connected to the bottom of the first housing 11, located on the side of the steering pin 121, and arranged in parallel with the steering pin 121; and a first end of the rope 30 is sleeved on the first fixing pin 122. The steering pin 121 may be arranged at the bottom of the first housing 11 and is located below the hollow screw 221 in the axial direction, and the rope 30 may be passed around the steering pin 121 to turn the rope 30, and the steering pin 121 may be arranged in parallel with the second fixing pin to prevent the rope 30 from twisting in the portion between the steering pin 121 and the second fixing pin after passing around the steering pin 121 and fixing it to the second fixing pin. The first fixing pin 122 may be arranged at the bottom of the first housing 11 and is located on the side of the steering pin 121. The first fixing pin 122 can be detachably mounted on the bottom of the first shell 11, and the two ends of the first fixing pin 122 can be fixedly connected to the bottom of the first shell 11. After the two ends of the first fixing pin 122 are connected to the bottom of the first shell 11, they can be fixed by epoxy glue, which can effectively prevent the first fixing pin 122 from being separated from the first shell 11 after the rope 30 is melted during the unlocking process, so as to ensure the stability of the connection between the first fixing pin 122 and the first shell 11. After the rope 30 is melted by the hot knife assembly 13, the first fixing pin 122 can be removed from the first shell 11, and the melted rope 30 can be removed to facilitate the replacement of a new rope 30. Figure 5As shown, the first fixing pin 122, the second fixing pin and the steering pin 121 can be arranged in an L shape, the first end of the rope 30 can be sleeved on the first fixing pin 122, then the rope 30 is passed around the steering pin 121 to turn the rope 30, and the second end of the rope 30 is sleeved on the second fixing pin, so that the rope 30 is fixed in the first device 10 and the second device 20. The first fixing pin 122 can be arranged in parallel with the steering pin 121 to ensure that after the first end of the rope 30 is fixed to the first fixing pin 122 and passes around the steering pin 121, the portion between the steering pin 121 and the second fixing pin does not twist. The first fixing pin 122 provided in this embodiment can fix the first end of the rope 30, so that the two ends of the rope 30 are respectively fixed to the first fixing pin 122 and the second fixing pin. By fixing the rope 30 with the detachable first fixing pin 122, the fused rope 30 can be quickly and conveniently removed after each unlocking is completed, and the rope 30 can be easily replaced when the first component and the second component need to be locked and fixed again, and the hot knife unlocking device can be quickly restored to the locked state. The turning pin 121 provided in this embodiment makes the rope 30 longer, and the first fixing pin 122 is arranged in parallel with the turning pin 121, which can prevent the rope 30 from twisting between the first fixing pin 122 and the turning pin 121, and ensure the preload force. At the same time, the rope 30 is prevented from twisting so that it is subjected to torsional stress and tensile stress at the same time, resulting in local stress concentration and causing the rope 30 to break, which can improve the safety of the hot knife unlocking device. Since both ends of the rope can be provided with mounting rings for fixing on the first fixing pin 122 and the second fixing pin, the installation of the mounting rings results in a shorter working length of the rope 30, and the rope 30 is fixed by the first fixing pin 122, and the rope 30 is made to pass around the steering pin 121 and then fixed to the second fixing pin, so that the length of the rope 30 between the first fixing pin 122 and the second fixing pin can be extended, so that the working length of the rope 30 is longer, which is convenient for production and manufacturing, and can facilitate the installation and fixing of the rope 30, avoid the deviation of the rope 30 to affect the locking and unlocking effects, and ensure that the rope 30 remains vertical in the first device 10 and the second device 20 and does not contact the inner walls of the first device 10 and the second device 20. Through this embodiment, the rope 30 can have a larger deformation space, and the rope 30 is turned by the steering pin 121, which can facilitate the adjustment of the rope tension between the second fixing pin and the steering pin 121, and prevent the rope 30 from being directly straightened, which causes excessive stretching between the second fixing pin and the first fixing pin 122 and causes the rope 30 to break.

[0048] In some embodiments, Figure 1 As shown, the first housing 11 may further include: at least two guide holes 113 disposed on the side of the rope 30; Figure 4As shown, the hot knife assembly 13 includes: a knife holder 132, used to fix the knife rod 131; a guide rod 133, fixedly arranged on the back side of the knife holder 132, passing through the guide hole 113, and capable of being movably arranged along the axial direction of the guide hole 113; a spring 134, which is sleeved on the guide rod 133, one end of which abuts against the back side of the knife holder 132, and the other end abuts against the first shell 11, and is used to make the knife rod 131 abut against the rope 30. The hot knife assembly 13 may include a knife holder 132, which may be used to fix the knife bar 131. The knife holder 132 may be in the shape of a sheet, disposed on one side of the knife bar 131, and be equal in length to or longer than the length of the knife bar 131. The knife bar 131 may be fixedly connected to the knife holder 132 at both ends along the length direction. The knife holder 132 and the knife bar 131 may be connected by screws. The knife holder 132 and the knife bar 131 may be provided with through holes at corresponding positions at both ends along the length direction, for screws to pass through, so that the knife holder 132 and the knife bar 131 are fixedly connected by screws. Multiple layers of slide grooves parallel to each other may be formed inside the first housing 11, and each layer of the slide grooves is used to accommodate a hot knife assembly 13, so that the knife holder 132 and the knife bar 131 of the hot knife assembly 13 can slide in the slide grooves. The slide grooves may extend along the radial direction of the rope 30, so that the knife bar 131 can fuse the rope 30 along the radial direction of the rope 30. The hot knife assembly 13 may further include a guide rod 133, which may be fixedly disposed on the side of the knife holder 132 away from the knife bar 131. The guide rod 133 may be located in the center of the knife holder 132, and extend outward along the side of the knife holder 132 away from the knife bar 131, and the guide rod 133 may be columnar. The first housing 11 may include at least two guide holes 113 disposed on the side of the rope 30, for allowing the guide rod 133 of the hot knife assembly 13 to pass through, and the guide holes 113 may be disposed opposite to each other, and are respectively located on both sides of the rope 30. The guide holes 113 may extend outwardly in the radial direction of the rope 30, so that the guide rod 133 moving in the guide holes 113 can drive the hot knife to move in the radial direction of the rope 30, thereby cutting the rope 30. The shape of the guide hole 113 can be determined according to the guide rod 133, so that the guide rod 133 can move along the axial direction of the guide hole 113, that is, along the extension direction of the guide hole 113, so that the knife bar 131 of the hot knife can move along the axial direction of the guide hole 113 to facilitate cutting the rope 30.The hot knife assembly 13 may further include a spring 134, which may be sleeved on the guide rod 133. One end of the spring 134 may abut against a side of the knife holder 132 away from the knife bar 131, and the other end of the spring 134 may abut against an inner surface of the first shell 11. When the hot knife assembly 13 is installed on the first shell 11 and there is no need to cut the rope 30 to unlock the first component and the second component, the spring 134 may be in a compressed state, and the knife bar 131 does not need to be heated, so that the knife bar 131 abuts against the rope 30. When the hot knife assembly 13 needs to cut the rope 30 to unlock the first component and the second component, the knife bar 131 may be heated so that the knife bar 131 melts the rope 30. At the same time, the spring 134 in a compressed state can push the knife holder 132, so that the knife bar 131 fixed on the knife holder 132 can move along the axial direction of the guide rod 133 toward a side close to the rope 30, so that the knife bar 131 melts the rope 30, so that the first component and the second component are unlocked and separated. The guide hole 113 provided in this embodiment can limit the movement of the hot knife assembly 13, and the knife rod 131 is fixedly connected by the knife holder 132, and the knife holder 132 is pushed by the spring 134, so that the hot knife assembly 13 can move along the direction of the guide hole 113 to fuse the rope 30, so that the hot knife assembly 13 remains stable during the process of fusing the rope 30. At the same time, it can ensure that the cross-sectional expansion of the rope 30 caused by the inclination of the knife rod 131 during the process of the two hot knife assemblies 13 fusing the rope 30 can ensure the safety and stability of the hot knife assembly 13.

[0049] In some embodiments, Figure 3 , Figure 4As shown, the guide rod 133 is formed with a first limiting hole 1331 along the radial direction of the guide rod 133; the first housing 11 is formed with a second limiting hole 114 axially parallel to the first limiting hole 1331; the hot knife unlocking mechanism also includes: a limiting pin 40, which is used to penetrate the first limiting hole 1331 and the second limiting hole 114 during the process of assembling the hot knife assembly 13 to the first housing 11, so as to limit the position of the guide rod 133. The guide rod 133 may be formed with a first limiting hole 1331 along the radial direction, the first housing 11 may be provided with a second limiting hole 114 axially parallel to the first limiting hole 1331 on the outer wall of the guide hole 113, and the hot knife unlocking mechanism may include a limiting pin 40, and the length of the limiting pin 40 may be greater than the outer diameter of the guide hole 113. During the process of assembling the hot knife unlocking mechanism, the hot knife assembly 13 can be installed on the first shell 11, the guide rod 133 can be installed in the guide hole 113, the first limiting hole 1331 and the second limiting hole 114 are aligned, and the limiting pin 40 is passed through the first limiting hole 1331 and the second limiting hole 114, so as to limit the position of the guide rod 133 and prevent the spring 134 from applying force to the knife holder 132 to cause relative movement between the guide rod 133 and the limiting hole, thereby fixing the hot knife assembly 13 to the first shell 11. When the hot knife unlocking mechanism is assembled, the limit pin 40 can be pulled out from the first limit hole 1331 and the second limit hole 114, so that the spring 134 applies force to the knife holder 132, so that the guide rod 133 slides along the guide hole 113, and the hot knife assembly 13 moves toward the rope 30 until the knife bar 131 abuts against the rope 30. The hot knife assembly 13 can be in a static state, and the knife bars 131 of the two hot knife assemblies 13 are respectively tangential to the rope 30. The first limit hole 1331, the second limit hole 114 and the limit pin 40 can fix the hot knife assembly 13 during the assembly process of the hot knife unlocking mechanism, maintain the stability of the hot knife assembly 13, ensure the accuracy of the installation of the hot knife assembly 13, and prevent the hot knife assembly 13 from being displaced during the installation process.

[0050] In some embodiments, Figure 1As shown, a concave portion is formed on the top surface of the first shell 11; a convex portion matching the concave portion is formed on the bottom surface of the second shell 21, which is used to limit the radial movement of the first shell 11 and the second shell 21. The top center of the first shell 11 may be concave to form a concave portion, and the concave portion may include a concave contact surface for abutting against the second shell 21, and the concave contact surface may be an inclined surface, and the concave degree of the concave portion may gradually increase from the circumference to the center, so that the first shell 11 is concave to the maximum degree at the center of the concave portion, so that the central height of the top surface of the first shell 11 is lower than the height of the circumference. The bottom surface of the second shell 21 may be convex, and a convex portion matching the concave portion is formed, and the convex portion may include a convex contact surface for abutting against the first shell 11, and the convex contact surface may be an inclined surface. The convex degree of the convex portion may gradually increase from the circumference to the center, so that the second shell 21 is convex to the maximum degree at the center of the convex portion, so that the central height of the bottom surface of the second shell 21 is the same as the height of the circumference. The concave contact surface of the first shell 11 is brought into contact with the convex contact surface of the second shell 21, so that the concave and convex are butted together, and the concave and convex are able to restrict each other, so as to avoid radial relative movement between the first shell 11 and the second shell 21. The concave contact surface and the convex contact surface can be respectively covered with a high wear resistance coating, which can increase the friction of the concave contact surface and the convex contact surface, so that when the concave and convex are butted together, the gripping force between the concave contact surface and the convex contact surface is stronger, so as to avoid radial relative movement between the concave and convex, and also have better durability, can reduce the wear between the concave and convex, have better wear resistance, and extend the service life of the first shell 11 and the second shell 21. By means of the mutually matching recessed portions of the first shell 11 and the convex portions of the second shell 21, the first shell 11 and the second shell 21 can be fixed in the radial direction, thereby avoiding relative movement of the first shell 11 and the second shell 21 in the radial direction, ensuring the stability of the first shell 11 and the second shell 21 in the compressed and locked state, and ensuring the safety of the hot knife unlocking mechanism when the first component and the second component are compressed and locked.

[0051] In some embodiments, Figure 7As shown, the hot knife unlocking mechanism may further include: one or more hollow conduits 50, which may be used to be fixedly connected to one or more third components between the first component and the second component, and the rope 30 passes through the hollow conduit 50; wherein the top surface of the hollow conduit 50 is formed with a conduit recess that matches the protrusion; and the bottom surface of the hollow conduit 50 is formed with a conduit protrusion that matches the concave. In the case where three or more components are locked and unlocked by the hot knife unlocking mechanism, the hot knife unlocking mechanism may further include one or more hollow conduits 50, one or more third components may be included between the first component and the second component, and the hollow conduit 50 may be fixed to the third component. The hollow conduit 50 may be an embedded part, fixedly arranged in the third component, so that the rope 30 passes through the first component, the hollow conduit 50 and the second component, and the two ends of the rope 30 are respectively fixed to the first component and the second component. The first component, the second component and the third component are compressed and fixed by the rope 30. The first component, the hollow conduit 50 and the through hole of the second component for the rope 30 to pass through can be connected to each other to ensure that the rope 30 is located in the middle of the hole and does not contact the hole wall, so as to avoid the hot knife assembly 13 melting the rope 30 to achieve unlocking, and the melted rope 30 hooking the hole wall to cause jamming. In the case where locking and unlocking are required in multiple places, in some embodiments, multiple hot knife unlocking mechanisms can be set, and each hot knife unlocking mechanism includes at least two hot knife assemblies. Figure 6 As shown, two hot knife assemblies 13 are controlled in parallel, and each hot knife assembly 13 can operate independently. During the unlocking process, switch a can be closed so that the circuit supplies power to hot knife assembly A, and hot knife assembly A is heated to fuse rope 30. If hot knife assembly A completely fuses rope 30, the hot knife unlocking mechanism is unlocked. If hot knife assembly A does not fuse rope 30, switch b can be closed so that the circuit supplies power to hot knife assembly B, and hot knife assembly B is heated to fuse rope 30. During the unlocking process, switch a and switch b can also be closed at the same time so that hot knife assembly A and hot knife assembly B operate at the same time and fuse rope 30 to achieve unlocking. By Figure 6 The circuit controls the hot knife unlocking mechanism, the power supply circuit is simple, and the hot knife unlocking mechanism can be safely controlled. Through one or more hollow conduits 50, three or more components can be locked and unlocked, making the hot knife unlocking mechanism more practical and applicable to a variety of different scenarios.

[0052] In a second aspect, the present disclosure further provides a satellite, which may include: a satellite body, one or more solar panels 60, and a hot knife unlocking mechanism as described in any of the above embodiments.

[0053] One or more solar panels 60 can be arranged on the side of the satellite body, and the solar panels 60 can be locked and unfolded through the hot knife unlocking mechanism, so as to lock the solar panels 60 in a non-working state, and operate the hot knife unlocking mechanism in a working state to unfold the solar panels 60 so that the solar panels 60 can operate and power the satellite. As in the hot knife unlocking mechanism of any of the above embodiments, the first shell 11 is fixedly connected to the satellite body, and the second shell 21 is fixedly connected to a solar panel 60, which is used to lock or unlock the satellite body and the solar panel 60 so that the solar panel 60 can be unfolded. The first shell 11 of the hot knife unlocking mechanism can be fixedly connected to the satellite body and can be fixed by screws. The second shell 21 can be fixedly connected to a solar panel 60. For a single-fold solar panel 60, the second device 20 can be installed on the single-fold solar panel 60 to realize the unfolding and locking of the solar panel 60 relative to the satellite body. For the multi-fold solar sail panel 60, the second device 20 can be installed on the folded solar sail panel 60 farthest from the side of the satellite body, and the hollow conduit 50 can be installed in the remaining solar sail panels 60 to achieve the locking and separation of the multi-fold solar sail panel 60 relative to the satellite body and between the solar sail panels 60. Through the satellite of this embodiment, the solar sail panel 60 can be locked and unfolded through the hot knife unlocking mechanism, and the rope 30 provides a pressing force to the solar sail panel 60 and the satellite body. The rope 30 is melted when unlocking to avoid impact on the solar sail panel 60 and damage to the solar sail panel 60 or the satellite body, and the operation safety of the solar sail panel 60 during the pressing and unlocking process can be guaranteed. At the same time, since the rope 30 is easy to replace, it is convenient for the satellite to carry out the unfolding and locking test of the solar sail panel 60 on the ground, and multiple tests can be carried out to improve the efficiency of the test. Before the satellite is launched, the solar sail panel 60 needs to be folded and locked with the satellite body through the hot knife unlocking mechanism to reduce the volume of the satellite and facilitate the launch of the satellite. When the satellite enters orbit after launch, the solar panels 60 need to be unfolded to better absorb sunlight and power the satellite body. At this time, the rope can be melted by the hot knife assembly to unlock the hot knife unlocking mechanism, and the solar panels 60 can be fully unfolded. Compared with locking and unlocking by pyrotechnics, the hot knife unlocking mechanism is used to lock and unlock in this embodiment, and there is less impact force during the unlocking process to ensure the safe operation of the satellite. The satellite of this embodiment can ensure that the solar panels 60 can be locked and fixed and quickly unfolded during the process from the launch of the satellite to the stable operation, with higher efficiency and safety.

[0054] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0055] In the context of this application, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0056] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0057] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the embodiments of the present application.

Claims

1. A hot knife unlocking mechanism, used to lock or unlock the first component and the second component, the hot knife unlocking mechanism comprising: A rope is provided through the first component and the second component, and the first component and the second component are locked by the rope; A first device, used for fixed connection with the first component, comprises: A first housing, used to be fixed to the first component; A first fixing portion, fixed to the first housing and connected to the first end of the rope; A hot knife assembly is arranged inside the first housing, and a knife bar of the hot knife assembly abuts against the rope; A second device, used for fixed connection with the second component, comprises: A second housing, used to be fixed to the second component; A pre-tension adjustment component is connected to the second end of the rope. The pre-tension adjustment component is arranged on the second shell and can move in a direction close to or away from the first device to adjust the tension of the rope.

2. The hot knife unlocking mechanism according to claim 1, wherein a mounting hole is formed on the top surface of the second housing, and a receiving cavity is formed inside the mounting hole of the second housing; The preload adjustment assembly comprises: A hollow screw, the lower portion of which is disposed in the accommodating cavity, the upper portion of which protrudes outward from the mounting hole, and is cooperatively connected with the second housing in a manner of being movable along the axial direction of the hollow screw; A second fixing portion, disposed at the top of the hollow screw and connected to the second end of the rope; The adjusting nut is sleeved on the outside of the hollow screw, and the bottom end thereof abuts against the top surface of the second shell body, and is used for axially moving the hollow screw to adjust the tension of the rope.

3. The hot knife unlocking mechanism according to claim 2, wherein the second fixing portion comprises: A second fixing pin, both ends of which are connected to the side walls of the hollow screw; The second end of the rope is sleeved on the second fixing pin.

4. According to the hot knife unlocking mechanism of claim 2, a plane extending in the axial direction is formed on the outer peripheral surface of one side of the hollow screw, and the plane cooperates with the mounting hole to prevent the hollow screw from rotating.

5. The hot knife unlocking mechanism according to claim 4, wherein the second housing comprises: A pressing seat, used for fixedly connecting with the second component; The limiting cover is formed with the mounting hole, the limiting cover is detachably fixedly connected to the pressing seat and is formed with the accommodating cavity for accommodating part of the hollow screw.

6. The hot knife unlocking mechanism according to claim 2, wherein the first fixing portion further comprises: A steering pin, arranged at the bottom of the first housing and located below the hollow screw in the axial direction; A first fixing pin, both ends of which are fixedly connected to the bottom of the first housing, is located on the side of the steering pin and is arranged parallel to the steering pin; The first end of the rope is sleeved on the first fixing pin.

7. The hot knife unlocking mechanism according to claim 2, the first housing further comprising: at least two guide holes disposed on the sides of the rope; The hot knife assembly comprises: A knife holder, used for fixing the knife rod; A guide rod, fixedly arranged on the back side of the tool holder, passes through the guide hole, and can be moved along the axial direction of the guide hole; A spring is sleeved on the guide rod, one end of which abuts against the back side of the knife holder and the other end of which abuts against the first shell, and is used to make the knife bar abut against the rope.

8. The hot knife unlocking mechanism according to claim 7, wherein the guide rod is formed with a first limiting hole along the radial direction of the guide rod; The first housing is formed with a second limiting hole axially parallel to the first limiting hole; The hot knife unlocking mechanism also includes: A limit pin is used to penetrate the first limit hole and the second limit hole during the process of assembling the hot knife assembly on the first shell to limit the position of the guide rod.

9. The hot knife unlocking mechanism according to claim 2, wherein: There are two hot knife assemblies, which are in a master-slave relationship and operate independently. The two hot knife assemblies are arranged opposite to each other, and the knife bars of the two hot knife assemblies are respectively in contact with the two sides of the rope.

10. The hot knife unlocking mechanism according to claim 1, wherein: A concave portion is formed on the top surface of the first shell; A convex portion matched with the concave portion is formed on the bottom surface of the second shell to limit radial movement of the first shell and the second shell.

11. The hot knife unlocking mechanism according to claim 10, further comprising: One or more hollow conduits are used to be fixedly connected to one or more third components located between the first component and the second component, and the rope passes through the hollow conduits; wherein the top surface of the hollow conduit is formed with a conduit recess that cooperates with the protrusion; and the bottom surface of the hollow conduit is formed with a conduit protrusion that cooperates with the concave portion.

12. A satellite, comprising: Satellite body; One or more solar panels are arranged on the side of the satellite body; According to the hot knife unlocking mechanism as described in any one of claims 1-11, the first shell is fixedly connected to the satellite body, and the second shell is fixedly connected to one of the solar panels, and is used to lock or unlock the satellite body and the solar panel to unfold the solar panel.

Images