A deorbit sail device

Abstract

The application relates to a de-orbiting sail device, belonging to the technical field of aircraft de-orbiting, which comprises a box body, the box body comprising a top plate, a bottom plate and four right-angle side plates, the four right-angle side plates movably surrounding the top plate and the bottom plate, the four right-angle side plates being spliced into a square shape, the side of the top plate and the bottom plate close to each other being fixed with a limiting plate, the limiting plate being abuttable with the outer side wall of the right-angle side plate, a stretching mechanism being arranged in the box body, the stretching mechanism comprising two first rotating shafts rotatably arranged on the top plate and two second rotating shafts rotatably arranged on the bottom plate, memory alloy rods being wound on the first rotating shafts and the second rotating shafts, the ends of the memory alloy rods away from the first rotating shafts or the second rotating shafts being fixedly connected with the right-angle side plates, the inner side edges of the right-angle side plates being fixed with a sail body, the box body further comprising a locking mechanism for locking the stretching mechanism and a promoting mechanism for promoting the stretching of the memory alloy rods, when the bottom plate and the top plate are away from each other, the memory alloy rods are stretched to make the right-angle side plates away from each other to unfold the sail body.

Description

Technical Field

[0001] This application relates to the technical field of aircraft deorbiting, and in particular to a deorbiting sail device. Background Technology

[0002] When a satellite reaches the end of its service life and remains in orbit, it becomes space debris, jeopardizing the safety of spacecraft. A deorbit sail is a passive deorbiting device installed on a satellite. By deploying a sail, it increases the satellite's drag during orbit, causing it to decelerate and deorbit. Upon contact with the atmosphere, the deorbited satellite burns up due to friction, thus clearing away space debris.

[0003] Currently, related deorbiting sail devices include, for example, Chinese patent CN207292479U, which discloses an automatic deorbiting device for a CubeSat. The device includes a locking device, a storage mechanism, a mounting panel, a conical spring, a deployment mechanism, and a thin-film sail. The locking device is fixed to the top surface of the mounting panel, and the thin-film sail is attached to the deployment mechanism. Upon receiving a ground command, the locking device releases the central shaft within the deployment mechanism. The shape memory alloy rod wound on the central shaft extends and resets to a straight rod state by releasing its stored elastic potential energy, thereby driving the deorbiting sail to deploy and enabling the satellite to quickly deorbit.

[0004] In related technologies, the deployment of off-track sails usually requires the use of shape memory alloy rods. When the off-track sail device is in the retracted state, the shape memory alloy rods are in a folded state, which may result in insufficient deployment when the sail needs to be deployed. Summary of the Invention

[0005] To reduce the problem of insufficient deployment of shape memory alloy rods, this application provides an off-track sail device.

[0006] The off-track sail device provided in this application adopts the following technical solution:

[0007] An off-track sail device includes a housing comprising a top plate, a bottom plate, and four right-angled side plates. The four right-angled side plates are movably arranged between the top plate and the bottom plate, and are joined together to form a square. Limiting plates are fixed to the sides of the top and bottom plates that are close to each other, and these limiting plates can abut against the outer walls of the right-angled side plates. An extension mechanism is provided inside the housing. The extension mechanism includes two first rotating shafts rotatably mounted on the top plate and two second rotating shafts rotatably mounted on the bottom plate. The axes of the first and second rotating shafts are square-shaped and located inside the housing. A shape memory alloy rod is wound around each of the first and second rotating shafts. The end of the shape memory alloy rod away from the first or second rotating shaft is fixedly connected to the bend of the right-angled side plate. A sail is fixed to the inner side of each right-angled side plate. The housing also includes a locking mechanism for locking the extension mechanism and a facilitating mechanism for promoting the extension of the shape memory alloy rods. When the locking mechanism is unlocked, the bottom plate and the top plate move away from each other, and the shape memory alloy rods extend, causing the right-angled side plates to move away from each other to unfold the sail.

[0008] By adopting the above technical solution, when the locking mechanism is in the locked state, the four right-angled side plates are spliced ​​together to form a square, and the limiting plates on the top and bottom plates are located outside the four right-angled side plates. At this time, the shape memory alloy rod is wrapped around the first or second rotating shaft. When the sail needs to be deployed, the ground sends a command to unlock the locking mechanism, causing the top and bottom plates to move away from each other, and the shape memory alloy rod extends to move the four right-angled side plates away from each other, thereby deploying the sail. During the deployment process, the mechanism further promotes the right-angled side plates to move away from each other, reducing the problem of insufficient deployment of the shape memory alloy rod.

[0009] Optionally, guide plates are fixed on each of the right-angle side plates. The guide plates are parallel to the length direction of the shape memory alloy rod. When the shape memory alloy rod is extended, the guide plates are located on both sides of the shape memory alloy rod.

[0010] By adopting the above technical solution, when the shape memory alloy rod extends outward, it forms a diagonally distributed cross shape. The guide plates are set parallel to both sides of the shape memory alloy rod, which guides the extension of the shape memory alloy rod and ensures the normal unfolding of the sail.

[0011] Optionally, the promoting mechanism includes a fixing block fixed to the base plate, a first extending rod rotatably mounted on the fixing block, the first extending rod extending towards the top plate, a second extending rod rotatably mounted at the end of the first extending rod away from the fixing block, a torsion spring fixed between the first extending rod and the second extending rod, a push rod rotatably mounted at the end of the second extending rod away from the first extending rod, the end of the push rod away from the second extending rod being fixedly connected to a right-angle side plate, the length direction of the push rod being parallel to the length direction of the shape memory alloy rod, a stop block fixed on the side of the top plate near the base plate, when the top plate abuts against the right-angle side plate, the stop block abuts against the side of the second extending rod away from the first extending rod.

[0012] By adopting the above technical solution, when the locking mechanism opens the box and the top plate and bottom plate move away from each other, the blocking force of the stop block on the second extension rod disappears, the torsion spring expands the angle between the first extension rod and the second extension rod, thereby causing the push rod to slide away from the fixed block, thus promoting the extension of the right-angle side plate and improving the unfolding effect of the sail.

[0013] Optionally, the locking mechanism includes a first slide rod and a second slide rod, the axes of the first slide rod and the second slide rod are located on the same straight line, a locking rope and a spring are fixed between the first slide rod and the second slide rod, the locking mechanism also includes a fuse module, the fuse module abuts against the locking rope, when the locking rope pulls the first slide rod and the second slide rod taut, the spring is in a compressed state, the fuse module heats up after being energized and can melt the locking rope, the locking mechanism also includes a connecting assembly, the first slide rod and the second slide rod are both rotatably connected to the connecting assembly, when the first slide rod and the second slide rod move away from each other, the top plate and the bottom plate move away from each other through the connecting assembly.

[0014] By adopting the above technical solution, the first and second slide rods approach each other under the action of the locking rope. Under the action of the connecting component, the top plate and the bottom plate abut against the two sides of the right-angle side plate respectively. When the locking mechanism needs to be unlocked, the fusible module is energized and heated to melt the locking rope, causing the first and second slide rods to move away from each other under the action of the spring. Under the action of the connecting component, the top plate and the bottom plate slide in the direction of moving away from each other, so that the limiting plate no longer limits the right-angle side plate, thereby allowing the shape memory alloy rod to extend and push out the right-angle side plate, realizing the deployment of the sail.

[0015] Optionally, the connecting assembly includes a first rotating rod rotatably connected to a first sliding rod, a first through rod rotatably mounted on the middle section of the first rotating rod, a connecting plate fixedly connected to the end of the first through rod away from the first rotating rod, the connecting plate being inserted between two adjacent right-angle side plates, a first fixed rod rotatably connected to the end of the first rotating rod away from the first sliding rod, and a base plate fixedly connected to the end of the first fixed rod away from the first rotating rod. Both ends of the first rotating rod are provided with first oblong holes, and the first rotating rod is rotatably connected to the first sliding rod and the first fixed rod respectively through the first oblong holes.

[0016] By adopting the above technical solution, when the first slide rod slides away from the second slide rod, the first rotating rod rotates around the first through rod as an axis, causing the first fixed rod to push out the bottom plate, so that the limiting plate no longer abuts against the outside of the right-angle side plate, thereby facilitating the extension of the shape memory alloy rod.

[0017] Optionally, the connecting assembly further includes a second rotating rod rotatably connected to the second sliding rod. A second through rod is rotatably installed in the middle section of the second rotating rod. The end of the second through rod away from the second rotating rod is fixedly connected to the connecting plate. A second fixed rod is rotatably connected to the end of the second rotating rod away from the second sliding rod. The end of the second fixed rod away from the second rotating rod is fixedly connected to the top plate. A second oblong hole is provided at both ends of the second rotating rod. The second rotating rod is rotatably connected to the second sliding rod and the second fixed rod through the second oblong hole, respectively.

[0018] By adopting the above technical solution, when the second slide bar slides away from the first slide bar, the second rotating rod rotates around the second through rod as an axis, causing the second fixed rod to push out the top plate, thereby achieving the effect of the top plate and the bottom plate moving away from each other, which facilitates the unfolding of the shape memory alloy rod.

[0019] Optionally, the locking mechanism further includes two first connecting rods rotatably connected to the first slide rod. Each of the two first connecting rods is rotatably mounted on the end of the first slide rod away from the spring. Each of the first connecting rods is rotatably mounted on the end away from the first slide rod. A first sliding shaft is fixed to the end of the first push rod away from the first connecting rod. Two second rotating shafts are arranged diagonally, and a second sliding groove is provided on the end face of each of the two second rotating shafts away from the base plate. The first sliding shaft extends into the second sliding groove and is slidably connected to the second sliding groove. When the two first sliding shafts are close to each other, the projections of the axes of the first sliding shaft and the second rotating shaft in the vertical direction do not coincide. When the two first sliding shafts are far apart, the axes of the first sliding shaft and the second rotating shaft are located on the same straight line.

[0020] By adopting the above technical solution, in order to further ensure the stability of the locking mechanism during locking, when the first sliding shaft slides to a state away from the axis of the second rotating shaft, the second rotating shaft cannot rotate, ensuring that the shape memory alloy rod is stably wound on the second rotating shaft. When the first sliding rod moves away from the second sliding rod under the action of the spring, the first sliding rod causes the two first connecting rods to move away from each other, thereby realizing that the first sliding shafts move away from each other and align with the axis of the second rotating shaft, so that the extension of the shape memory alloy rod drives the rotation of the second rotating shaft.

[0021] Optionally, the locking mechanism further includes two second connecting rods rotatably connected to the second slide rod. Each of the two second connecting rods is rotatably mounted on the end of the second slide rod away from the spring. A second push rod is rotatably mounted on the end of each second connecting rod away from the second slide rod. A second sliding shaft is fixed to the end of each second push rod away from the second connecting rod. The two first rotating shafts are arranged diagonally, and a first sliding groove is provided on the end face of each of the two first rotating shafts away from the top plate. The second sliding shaft extends into the first sliding groove and is slidably connected to the first sliding groove. When the two second sliding shafts are close to each other, the projections of the axes of the second sliding shaft and the first rotating shaft in the vertical direction do not coincide. When the two second sliding shafts are far apart, the axes of the second sliding shaft and the first rotating shaft are located on the same straight line.

[0022] By adopting the above technical solution, when the second slide bar moves away from the first slide bar, it pushes the two second sliding shafts to slide away from each other until the axis of the second sliding shaft and the axis of the first rotating shaft are on the same straight line, so that the first rotating shaft can rotate and ensure that the shape memory alloy rod on the first rotating shaft unfolds normally.

[0023] Optionally, a plug-in assembly is provided between the right-angle side plate and the connecting plate. The plug-in assembly includes a plug-in block fixed on the right-angle side plate and a plug-in slot opened on the connecting plate. The plug-in block is fixed on the side of the right-angle side plate near the connecting plate, and the plug-in slot has an outer wall of the connecting plate. When the right-angle side plate abuts against the connecting plate, the plug-in block and the plug-in slot are aligned and plugged into each other.

[0024] By adopting the above technical solution, the right-angle side plate and the connecting plate together form a square. At this time, the plug-in block and the plug-in slot are aligned and plugged in, so that the connecting plate and the right-angle side plate cannot be vertically displaced, ensuring that the right-angle side plate is pushed out by the shape memory alloy rod, thereby realizing the deployment of the sail.

[0025] Optionally, a first mounting shaft is vertically fixed on the top plate. The width of the end of the first mounting shaft away from the top plate is greater than the width of the end near the top plate. A first mounting groove is formed on the end face of the first rotating shaft near the top plate. The first mounting shaft extends out of the first mounting groove and is rotatably connected to the first rotating shaft through the first mounting groove. A second mounting shaft is vertically fixed on the bottom plate. The width of the end of the second mounting shaft away from the bottom plate is greater than the width of the end near the top plate. A second mounting groove is formed on the end face of the second rotating shaft near the top plate. The second mounting shaft extends into the second mounting groove and is rotatably connected to the second rotating shaft through the second mounting groove.

[0026] By adopting the above technical solution, since the width of the end of the first mounting shaft away from the top plate is greater than the width of the end near the top plate, the first rotating shaft can be stably rotated and mounted on the top plate. Similarly, the width of the end of the second mounting shaft away from the bottom plate is greater than the width of the end near the top plate, so that the second rotating shaft can be stably rotated and mounted on the bottom plate.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When the locking mechanism is in the locked state, the four right-angled side plates are spliced ​​together to form a square, and the limiting plates on the top and bottom plates are located on the outside of the four right-angled side plates. At this time, the shape memory alloy rod is wrapped around the first or second rotating shaft. When the sail needs to be deployed, the ground sends a command to unlock the locking mechanism, causing the top and bottom plates to move away from each other, and the shape memory alloy rod extends to move the four right-angled side plates away from each other, thereby deploying the sail. During the deployment process, the mechanism further promotes the right-angled side plates to move away from each other, reducing the problem of insufficient deployment of the shape memory alloy rod.

[0029] 2. When the shape memory alloy rod extends outward, it forms a diagonally distributed cross shape. The limiting plates are set parallel to both sides of the shape memory alloy rod to guide the extension of the shape memory alloy rod and ensure the normal unfolding of the sail.

[0030] 3. When the locking mechanism opens the housing and moves the top and bottom plates away from each other, the blocking force of the stop block against the second extension rod disappears, and the torsion spring widens the angle between the first and second extension rods, thereby causing the push rod to slide away from the fixed block, thus promoting the extension of the right-angle side plate and improving the deployment effect of the sail. Attached Figure Description

[0031] Figure 1 This is an exploded diagram of the container.

[0032] Figure 2 This is a structural diagram of the extension mechanism, locking mechanism, and facilitating mechanism.

[0033] Figure 3 This is a cross-sectional view of the first rotating shaft.

[0034] Figure 4 This is a cross-sectional view of the second rotating shaft.

[0035] Figure 5 This is a cross-sectional view of the connecting components.

[0036] Figure 6 This is a structural diagram of the facilitation mechanism.

[0037] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Top plate; 111. First mounting shaft; 12. Bottom plate; 121. Second mounting shaft; 13. Right-angle side plate; 131. Guide plate; 14. Connecting plate; 141. First through rod; 142. Second through rod; 15. Plug-in assembly; 151. Plug-in block; 152. Plug-in slot; 16. Limiting plate; 2. Extension mechanism; 21. First rotating shaft; 211. First mounting slot; 212. First sliding groove; 22. Second rotating shaft; 221. Second mounting slot; 222. Second sliding groove; 23. Memory alloy rod; 3. Locking mechanism; 31. First sliding rod; 32. 321. Second slide rod; 33. Spring; 34. Connecting assembly; 35. First rotating rod; 36. First through hole; 37. First oblong hole; 38. First sliding shaft; 39. Second sliding shaft; 40. Promoting mechanism; 41. Fixed block; 42. First extending rod; 43. Second extending rod; 44. Torsion spring; 45. Push rod; 46. Stop block. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0039] This application discloses an off-track sail device.

[0040] Reference Figure 1 The off-track sail device includes a housing 1 and an extension mechanism 2, a locking mechanism 3, and a facilitating mechanism 4 disposed within the housing 1. When it is necessary to unfold the sail (not shown in the figure) inside the housing 1, the ground sends a command to unlock the locking mechanism 3, causing the extension mechanism 2 to unfold the sail. The facilitating mechanism 4 further facilitates the unfolding of the extension mechanism 2, reducing the problem of insufficient sail unfolding.

[0041] The enclosure 1 includes a top plate 11, a bottom plate 12, and four right-angled side plates 13. The four right-angled side plates 13 are spliced ​​together to form a square frame. The right-angled side plates 13 are located between the top plate 11 and the bottom plate 12. A connecting plate 14 is spliced ​​between two right-angled side plates 13. The right-angled side plates 13 and the connecting plate 14 are spliced ​​together to form a square. A plug-in component 15 is provided between the right-angled side plates 13 and the connecting plate 14. The plug-in component 15 ensures the stability when the right-angled side plates 13 are connected to the connecting plate 14.

[0042] The plug-in assembly 15 includes a plug-in block 151 and a plug-in slot 152. The plug-in block 151 is fixed to the side of the right-angle side plate 13 near the connecting plate 14. The plug-in slot 152 is opened on the side of the connecting plate 14 near the right-angle side plate 13. The plug-in block 151 and the plug-in slot 152 are plugged into each other to make the connecting plate 14 stably installed between the right-angle side plates 13, so that the connecting plate 14 cannot be detached from the right-angle side plate 13 in the vertical direction.

[0043] Limiting plates 16 are fixed on the side of the top plate 11 and the bottom plate 12 near the right-angle side plate 13. The limiting plates 16 are fixed at the four edges of the top plate 11 or the bottom plate 12, and the limiting plates 16 abut against the outer side wall of the right-angle side plate 13, so that the right-angle side plate 13 and the connecting plate 14 are limited between the top plate 11 and the bottom plate 12.

[0044] Reference Figure 2 The extension mechanism 2 includes two first rotating shafts 21 and two second rotating shafts 22 disposed inside the housing 1. The axes of the first rotating shafts 21 and the second rotating shafts 22 are parallel to each other. The first rotating shafts 21 and the second rotating shafts 22 are diagonally distributed at the center of the housing 1. Each first rotating shaft 21 and the second rotating shaft 22 is wound with a shape memory alloy rod 23. The end of the shape memory alloy rod 23 away from the first rotating shaft 21 or the second rotating shaft 22 is fixedly connected to the bend of the right-angle side plate 13, so that the shape memory alloy rod 23 forms a cross shape when extended.

[0045] Each right-angled side plate 13 has a sail (not shown in the figure) fixed to its inner side. The sail is triangular, with two end corners fixed to the bends of two adjacent right-angled side plates 13. The other end corner of the sail is fixed to the top plate 11 or the bottom plate 12. When the shape memory alloy rod 23 extends, it pushes the four right-angled side plates 13 away from each other, thereby unfolding the sail.

[0046] Two parallel guide plates 131 are fixed at the bend of each right-angle side plate 13. The guide plates 131 extend toward the first rotating shaft 21 or the second rotating shaft 22. When the shape memory alloy rod 23 extends, the two guide plates 131 are located on both sides of the shape memory alloy rod 23. The guide plates 131 guide the extension of the shape memory alloy rod.

[0047] Reference Figure 1 and Figure 3 Both first rotating shafts 21 are rotatably mounted on the top plate 11. Two first mounting shafts 111 are vertically fixed on the top plate 11. A first mounting groove 211 is provided on the end face of the first rotating shaft 21 near the first mounting shaft 111. The axis of the first mounting groove 211 is on the same straight line as the axis of the first rotating shaft 21. The first mounting shaft 111 extends out of the first mounting groove 211 and is rotatably connected to the first mounting groove 211. The width of the end of the first mounting shaft 111 away from the top plate 11 is greater than the width of the end near the top plate 11, ensuring that the first rotating shaft 21 will not completely detach from the first mounting shaft 111 when rotating on the first mounting shaft 111.

[0048] Reference Figure 1 and Figure 4 Two second rotating shafts 22 are rotatably mounted on the base plate 12. Two second mounting shafts 121 are vertically fixed on the base plate 12. A second mounting groove 221 is provided on the end face of the second rotating shaft 22 near the second mounting shaft 121. The axis of the second mounting groove 221 is on the same straight line as the axis of the second rotating shaft 22. The second mounting shaft 121 extends out of the second mounting groove 221 and is rotatably connected to the second mounting groove 221. The width of the end of the second mounting shaft 121 away from the base plate 12 is greater than the width of the end near the base plate 12, ensuring that the second rotating shaft 22 will not completely detach from the second mounting shaft 121 when rotating on the second mounting shaft 121.

[0049] When the locking mechanism 3 is unlocked, the shape memory alloy rod 23 automatically unfolds, causing the first rotating shaft 21 and the second rotating shaft 22 to rotate, and pushing out the right-angle side plate 13 to unfold the sail.

[0050] Reference Figure 3 and Figure 4 The locking mechanism 3 includes a first slide rod 31 and a second slide rod 32 located between the first rotating shaft 21 and the second rotating shaft 22. The first slide rod 31 is located above the second slide rod 32, and the axes of the first slide rod 31 and the second slide rod 32 are on the same straight line. A spring 321 and a locking rope (not shown in the figure) are fixed between the first slide rod 31 and the second slide rod 32. The locking rope pulls the first slide rod 31 and the second slide rod 32 towards each other. The locking mechanism 3 also includes a fuse module (not shown in the figure). The fuse module abuts against the locking rope. When the locking mechanism 3 needs to be unlocked, the fuse module is energized to generate heat, causing the locking rope to break. The first slide rod 31 and the second slide rod 32 move away from each other under the action of the spring 321.

[0051] Reference Figure 5The locking mechanism 3 also includes a connecting assembly 33 that moves the top plate 11 and the bottom plate 12 closer or further apart. The first slide rod 31 and the second slide rod 32 are both rotatably connected to the connecting assembly 33. The connecting assembly 33 includes a first rotating rod 331 rotatably mounted on the side wall of the first slide rod 31. A first through hole 3311 is provided in the middle section of the first rotating rod 331. The connecting plate 14 is positioned opposite to the first rotating rod 331, and a first through rod 141 is vertically fixed on the connecting plate 14. The first through rod 141 horizontally inserts into the first through hole 3311. The first rotating rod 331 is rotatably connected to the first through hole 3311. The end of the first rotating rod 331 away from the first sliding rod 31 is rotatably connected to the first fixed rod 332. The end of the first fixed rod 332 away from the first rotating rod 331 is fixedly connected to the base plate 12. The first fixed rod 332 is perpendicular to the base plate 12. Both ends of the first rotating rod 331 are provided with first waist-shaped holes 3312. The first rotating rod 331 is rotatably connected to the first sliding rod 31 and the first fixed rod 332 through the first waist-shaped holes 3312 respectively.

[0052] When the first sliding rod 31 is subjected to a force that moves towards the top plate 11, the first rotating rod 331 rotates about the first through rod 141 as an axis, thereby giving the first fixed rod 332 a force that pushes the bottom plate 12 away from the top plate 11, causing the bottom plate 12 to move away from the top plate 11.

[0053] The connecting assembly 33 also includes a second rotating rod 333 rotatably mounted on the side wall of the second sliding rod 32. The second rotating rod 333 has a second through hole 3331 in the middle section. A second through rod 142 is also vertically fixed on the connecting plate 14. The second through rod 142 is horizontally inserted into the second through hole 3331 and rotatably connected to the second through hole 3331, so that the second rotating rod 333 can rotate about the second through rod 142 as an axis. A second fixed rod 334 is rotatably connected to the end of the second rotating rod 333 away from the second sliding rod 32. The end of the second fixed rod 334 away from the second rotating rod 333 is fixedly connected to the top plate 11, and the second fixed rod 334 is perpendicular to the top plate 11. A second waist-shaped hole 3332 is opened at both ends of the second rotating rod 333. The second rotating rod 333 is rotatably connected to the second sliding rod 32 and the second fixed rod 334 through the second waist-shaped hole 3332 respectively.

[0054] When the first slide bar 31 and the second slide bar 32 approach each other, the top plate 11 and the bottom plate 12 abut against the two sides of the right-angle side plate 13 respectively, and the limiting plate 16 limits the frame formed by the right-angle side plate 13, so that the shape memory alloy rod 23 cannot push the right-angle side plate 13 out. When the first slide bar 31 and the second slide bar 32 slide away from each other, the first rotating rod 331 and the second rotating rod 333 rotate, and the first fixed rod 332 and the second fixed rod 334 push the top plate 11 and the bottom plate 12 away from each other respectively. At this time, the shape memory alloy rod 23 extends in a straight line, pushing the right-angle side plate 13 away from each other, thus realizing the deployment of the sail.

[0055] Reference Figure 3 and Figure 4 To further improve the locking effect of the locking mechanism 3, the locking mechanism 3 also includes two first connecting rods 34. Each of the two first connecting rods 34 is rotatably mounted at the end of the first sliding rod 31 away from the spring 321. The two first connecting rods 34 extend towards the second rotating shaft 22. Each of the first connecting rods 34 away from the first sliding rod 31 has a first push rod 35 rotatably mounted on its end. The end of the first push rod 35 away from the first connecting rod 34 is fixed with a first sliding shaft 36. Furthermore, each of the two second rotating shafts 22 has a second sliding groove 222 on its end face away from the base plate 12. The first sliding shaft 36 is set opposite to the second sliding groove 222, extending into and slidingly connecting the first sliding shaft 36 to the second sliding groove 222. When the center of the first sliding shaft 36 coincides with the axis of the second rotating shaft 22, the second rotating shaft 22 can rotate, ensuring the normal extension of the shape memory alloy rod 23. When the axis of the first sliding shaft 36 does not coincide with the axis of the second rotating shaft 22, the second rotating shaft 22 cannot rotate, ensuring its stability when locked.

[0056] The locking mechanism 3 also includes two second connecting rods 37, each rotatably mounted on the end of the second slide rod 32 away from the spring 321, and extending towards the first rotating shaft 21. A second push rod 38 is rotatably mounted on the end of each second connecting rod 37 away from the second slide rod 32. A second sliding shaft 39 is fixed to the end of the second push rod 38 away from the second connecting rod 37. The axis of the second sliding shaft 39 is parallel to the axis of the first rotating shaft 21, and a first sliding groove 212 is formed on the end face of each first rotating shaft 21 away from the top plate 11. The first sliding groove 212 extends from the axis near the first rotating shaft 21 towards the axis away from the first rotating shaft 21. The second sliding shaft 39 extends vertically into the first sliding groove 212 and is slidably connected to the first sliding groove 212. When the first sliding rod 31 and the second sliding rod 32 are close to each other, the two first sliding shafts 36 are located away from the axis of the second rotating shaft 22, and the two second sliding shafts 39 are located away from the axis of the first rotating shaft 21, thereby locking the first rotating shaft 21 and the second rotating shaft 22. When the first sliding rod 31 and the second sliding rod 32 are far apart from each other, the first sliding shaft 36 slides to the axis of the second rotating shaft 22, and the second sliding shaft 39 slides to the axis of the first rotating shaft 21, so that the shape memory alloy rod 23 can extend to ensure the normal rotation of the first rotating shaft 21 and the second rotating shaft 22.

[0057] Reference Figure 6The promoting mechanism 4 includes four fixing blocks 41, which are fixed at intervals on the base plate 12. A first extending rod 42 is rotatably mounted on each fixing block 41, extending towards the top plate 11. A second extending rod 43 is rotatably mounted on the end of the first extending rod 42 away from the fixing block 41, extending towards the right-angle side plate 13. Both the first extending rod 42 and the second extending rod 43 are parallel to the length direction of the limiting plate 16. A torsion spring 44 is fixed between the first extending rod 42 and the second extending rod 43, increasing the angle between them. A push-out rod 45 is rotatably mounted on the end of the second extending rod 43 away from the first extending rod 42. Fixedly connected to the right-angle side plate 13, the pushing direction of the push rod 45 is parallel to the length direction of the shape memory alloy rod 23. Four stops 46 are also fixed on the side of the top plate 11 near the bottom plate 12. The four stops 46 are opposite to the position of the second extension rod. When the top plate 11 abuts against the right-angle side plate 13, the stops 46 abut against the side of the second extension rod 43 away from the first extension rod 42, and the included angle between the first extension rod 42 and the second extension rod 43 becomes smaller. When the top plate 11 and the bottom plate 12 move away from each other, the force of the stops 46 against the second extension rod 43 disappears. Under the action of the torsion spring 44, the included angle between the first extension rod 42 and the second extension rod 43 increases, thereby causing the push rod 45 to push out the right-angle side plate 13, promoting the extension of the shape memory alloy rod 23, and allowing the sail to be better deployed.

[0058] The implementation principle of an off-track sail device according to an embodiment of this application is as follows:

[0059] When the sail inside the housing 1 needs to be unfolded, the ground sends a command to unlock the locking mechanism 3. At this time, the bottom plate 12 and the top plate 11 move away from each other. The shape memory alloy rods 23 on the first pivot 21 and the second pivot 22 form a cross shape to push out the right-angle side plate 13, so that the sail connected to the right-angle side plate 13, the bottom plate 12, and the top plate 11 is unfolded. This promotes the mechanism 4 to push the right-angle side plate 13 away from each other at the same time, reducing the problem of insufficient unfolding of the shape memory metal rods 23.

[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An off-track sail device, characterized in that: The enclosure includes a housing (1), which comprises a top plate (11), a bottom plate (12), and four right-angled side plates (13). The four right-angled side plates (13) are movably arranged between the top plate (11) and the bottom plate (12). The four right-angled side plates (13) are joined together to form a square. A limiting plate (16) is fixed on the side of the top plate (11) and the bottom plate (12) that are close to each other. The limiting plate (16) can abut against the outer wall of the right-angled side plate (13). The housing (1) is provided with an extension mechanism (2). The extension mechanism (2) includes two first rotating shafts (21) rotatably mounted on the top plate (11) and Two second rotating shafts (22) are rotatably mounted on the base plate (12). The axes of the first rotating shaft (21) and the second rotating shaft (22) are squarely arranged inside the housing (1). A shape memory alloy rod (23) is wound around both the first rotating shaft (21) and the second rotating shaft (22). The end of the shape memory alloy rod (23) away from the first rotating shaft (21) or the second rotating shaft (22) is fixedly connected to the bend of the right-angle side plate (13). A sail is fixed to the inner side of the right-angle side plate (13). The housing (1) is also provided with a locking mechanism (3) to lock the extension mechanism (2) and a mechanism to promote the extension of the shape memory alloy rod (23). When the locking mechanism (3) is unlocked, the base plate (12) and the top plate (11) move away from each other, and the shape memory alloy rod (23) extends to make the right-angle side plates (13) move away from each other to unfold the sail; the promoting mechanism (4) includes a fixing block (41) fixed on the base plate (12), a first extension rod (42) is rotatably mounted on the fixing block (41), the first extension rod (42) extends towards the top plate (11), and a second extension rod (43) is rotatably mounted on the end of the first extension rod (42) away from the fixing block (41), the first extension rod (42) and the second extension rod A torsion spring (44) is fixed between (43). A push rod (45) is rotatably installed at the end of the second extension rod (43) away from the first extension rod (42). The end of the push rod (45) away from the second extension rod (43) is fixedly connected to the right-angle side plate (13). The length direction of the push rod (45) is parallel to the length direction of the memory alloy rod (23). A stop block (46) is fixed on the side of the top plate (11) near the bottom plate (12). When the top plate (11) abuts against the right-angle side plate (13), the stop block (46) abuts against the side of the second extension rod (43) away from the first extension rod (42).

2. The off-track sail device according to claim 1, characterized in that: Each of the right-angle side plates (13) is fixed with a guide plate (131). The guide plate (131) is parallel to the length direction of the memory alloy rod (23). When the memory alloy rod (23) is extended, the guide plate (131) is located on both sides of the memory alloy rod (23).

3. The off-track sail device according to claim 1, characterized in that: The locking mechanism (3) includes a first slide rod (31) and a second slide rod (32). The axes of the first slide rod (31) and the second slide rod (32) are located on the same straight line. A locking rope and a spring (321) are fixed between the first slide rod (31) and the second slide rod (32). The locking mechanism (3) also includes a fuse module. The fuse module abuts against the locking rope. When the locking rope tightens the first slide rod (31) and the second slide rod (32), the spring (321) is in a compressed state. The fuse module heats up after being energized and can melt the locking rope. The locking mechanism (3) also includes a connecting component (33). The first slide rod (31) and the second slide rod (32) are rotatably connected to the connecting component (33). When the first slide rod (31) and the second slide rod (32) move away from each other, the top plate (11) and the bottom plate (12) move away from each other through the connecting component (33).

4. The off-track sail device according to claim 3, characterized in that: The connecting assembly (33) includes a first rotating rod (331) rotatably connected to the first sliding rod (31). A first through rod (141) is rotatably installed in the middle section of the first rotating rod (331). A connecting plate (14) is fixedly connected to the end of the first through rod (141) away from the first rotating rod (331). The connecting plate (14) is inserted between two adjacent right-angle side plates (13). A first fixed rod (332) is rotatably connected to the end of the first rotating rod (331) away from the first sliding rod (31). The end of the first fixed rod (332) away from the first rotating rod (331) is fixedly connected to the bottom plate (12). A first waist-shaped hole (3312) is opened at both ends of the first rotating rod (331). The first rotating rod (331) is rotatably connected to the first sliding rod (31) and the first fixed rod (332) respectively through the first waist-shaped hole (3312).

5. The off-track sail device according to claim 4, characterized in that: The connecting assembly (33) further includes a second rotating rod (333) rotatably connected to the second sliding rod (32). A second through rod (142) is rotatably installed in the middle section of the second rotating rod (333). The end of the second through rod (142) away from the second rotating rod (333) is fixedly connected to the connecting plate (14). The end of the second rotating rod (333) away from the second sliding rod (32) is rotatably connected to the second fixed rod (334). The end of the second fixed rod (334) away from the second rotating rod (333) is fixedly connected to the top plate (11). Both ends of the second rotating rod (333) are provided with second waist-shaped holes (3332). The second rotating rod (333) is rotatably connected to the second sliding rod (32) and the second fixed rod (334) through the second waist-shaped holes (3332).

6. The off-track sail device according to claim 3, characterized in that: The locking mechanism (3) further includes two first connecting rods (34) rotatably connected to the first slide rod (31). Each of the two first connecting rods (34) is rotatably mounted at the end of the first slide rod (31) away from the spring (321). Each of the first connecting rods (34) at the end away from the first slide rod (31) is rotatably mounted with a first push rod (35). A first sliding shaft (36) is fixed at the end of the first push rod (35) away from the first connecting rod (34). Two second rotating shafts (22) are arranged diagonally, and the two second rotating shafts... (22) A second sliding groove (222) is provided on the end face away from the bottom plate (12). The first sliding shaft (36) extends into the second sliding groove (222) and is slidably connected to the second sliding groove (222). When the two first sliding shafts (36) approach each other, the projection of the axis of the first sliding shaft (36) and the axis of the second rotating shaft (22) in the vertical direction does not coincide. When the two first sliding shafts (36) move away from each other, the axis of the first sliding shaft (36) and the axis of the second rotating shaft (22) are located on the same straight line.

7. The off-track sail device according to claim 3, characterized in that: The locking mechanism (3) further includes two second connecting rods (37) rotatably connected to the second slide rod (32). Both second connecting rods (37) are rotatably mounted on the end of the second slide rod (32) away from the spring (321). A second push rod (38) is rotatably mounted on the end of each second connecting rod (37) away from the second slide rod (32). A second sliding shaft (39) is fixed to the end of each second push rod (38) away from the second connecting rod (37). The two first rotating shafts (21) are arranged diagonally, and the two first rotating shafts... A first sliding groove (212) is provided on the end face of the shaft (21) away from the top plate (11). The second sliding shaft (39) extends into the first sliding groove (212) and is slidably connected to the first sliding groove (212). When the two second sliding shafts (39) approach each other, the projection of the axis of the second sliding shaft (39) and the axis of the first rotating shaft (21) in the vertical direction does not coincide. When the two second sliding shafts (39) move away from each other, the axis of the second sliding shaft (39) and the axis of the first rotating shaft (21) are located on the same straight line.

8. The off-track sail device according to claim 1, characterized in that: A plug-in assembly (15) is provided between the right-angle side plate (13) and the connecting plate (14). The plug-in assembly (15) includes a plug-in block (151) fixed on the right-angle side plate (13) and a plug-in groove (152) opened on the connecting plate (14). The plug-in block (151) is fixed on the side of the right-angle side plate (13) close to the connecting plate (14). The plug-in groove (152) has an outer wall of the connecting plate (14). When the right-angle side plate (13) and the connecting plate (14) abut, the plug-in block (151) and the plug-in groove (152) are aligned and plugged into each other.

9. The off-track sail device according to claim 1, characterized in that: A first mounting shaft (111) is vertically fixed on the top plate (11). The width of the end of the first mounting shaft (111) away from the top plate (11) is greater than the width of the end closer to the top plate (11). A first mounting groove (211) is provided on the end face of the first rotating shaft (21) close to the top plate (11). The first mounting shaft (111) extends out of the first mounting groove (211), and the first mounting shaft (111) is rotatably connected to the first rotating shaft (21) through the first mounting groove (211). A second mounting shaft (121) is vertically fixed on the base plate (12). The width of the end of the second mounting shaft (121) away from the base plate (12) is greater than the width of the end near the top plate (11). A second mounting groove (221) is provided on the end face of the second rotating shaft (22) near the top plate (11). The second mounting shaft (121) extends into the second mounting groove (221), and the second mounting shaft (121) is rotatably connected to the second rotating shaft (22) through the second mounting groove (221).

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