A crossbar type drag sail device

Abstract

This invention specifically relates to a crossbar drag sail device, comprising a drag sail shell, a deployment mechanism, an unlocking mechanism, and a crossbar mechanism; the deployment mechanism, unlocking mechanism, and crossbar mechanism are all fixed inside the drag sail shell; the drag sail shell includes a top plate, a door plate, a bottom plate, and door plate hinges; the deployment mechanism is fixedly disposed in the center of the bottom plate inside the drag sail shell, used to provide power for the deployment process and control the drag sail deployment speed; the unlocking mechanism is connected to the door plate by a binding wire passing through a hole in the lower part of the door plate, used to release the elastic potential energy stored in the deployment mechanism during the deployment process of the drag sail device; the crossbar mechanism includes three types of rods, the internal rods are fixed to each other by hinges and connected to the deployment mechanism; this alleviates the technical problem in the prior art that drag sail devices are difficult to achieve passive and controllable deployment.

Description

Technical Field

[0001] This invention relates to the field of aerospace satellite technology, and specifically to a crossbar drag sail device. Background Technology

[0002] With the continuous updating and development of modern technology, the use of microsatellites has become more and more frequent. Because microsatellites can carry little fuel and have a short working time, if they cannot be cleaned up in time after they reach the end of their working life, they will occupy valuable space orbital resources and threaten the normal operation of other spacecraft in orbit. Therefore, spacecraft need to leave their operating orbit after entering orbit for a period of time, which means that low-Earth orbit satellites should have the ability to actively de-orbit.

[0003] Currently, drag sail derailment is widely used due to its light weight, low cost, and ease of implementation. In existing technologies, drag sail designs can be broadly categorized into two types. One type utilizes a strip spring as a support rod, employing a self-storing drag sail design. The elastic mast is composed of a single strip spring or two strip springs stacked on top of each other, with a small hole at the free end. It is connected to a thin-film sail in the sail storage chamber via a nylon rope. During deployment, upon receiving a ground command, the central shaft within the deployment mechanism is either placed within the drag sail mechanism or ejected directly. The strip elastic mast wound around the central shaft releases its stored elastic potential energy, driving the thin-film sail fixed to the mast to deploy. However, the deployment process of the strip spring is rapid and uncontrolled, prone to expansion and jamming. This design cannot avoid the problem of uncontrolled strip spring deployment, increasing the requirements for the satellite attitude control system. The other type utilizes a composite material bistable rod as the drag sail support rod, using a geared motor to drive the support rod deployment. The use of a motor is unavoidable during drag sail deployment, placing stricter requirements on the onboard energy and electrical systems. Therefore, all existing drag sail designs have certain limitations. Summary of the Invention

[0004] (i) The present invention provides a crossbar type drag sail device to alleviate the technical problem that drag sail devices in the prior art do not have passive and controllable deployment.

[0005] (II) Technical Solution

[0006] To address the aforementioned technical problems, embodiments of the present invention provide a crossbar drag sail device for controllable deployment without passive deployment during the deorbiting process of a microsatellite. The device includes a drag sail outer shell, a deployment mechanism, an unlocking mechanism, and a crossbar mechanism; the deployment mechanism, unlocking mechanism, and crossbar mechanism are all fixed within the drag sail outer shell.

[0007] The drag sail outer shell includes an outer shell top plate, an outer shell door plate, an outer shell bottom plate, and an outer shell door plate hinge. The outer shell door plate and the outer shell top plate are rotatably connected by the outer shell door plate hinge. The outer shell bottom plate is located at the lower part of the drag sail outer shell.

[0008] The deployment mechanism is fixedly installed in the center of the bottom plate inside the drag sail shell, and is used to provide power for the deployment process and control the deployment speed of the drag sail.

[0009] The unlocking mechanism is connected to the outer shell door panel by a binding wire passing through a hole in the lower part of the door panel, and is used to release the elastic potential energy stored in the deployment mechanism during the deployment process of the drag sail device.

[0010] The crossbar mechanism includes three types of bars, which are fixed to each other by hinges and connected to the unfolding mechanism.

[0011] Furthermore, the unfolding mechanism includes a spring box, a transmission assembly, and an unfolding assembly;

[0012] The mainspring barrel includes a mainspring shaft, a mainspring spring, a mainspring barrel top plate, and a mainspring barrel side plate. The mainspring shaft is fixed in the center of the mainspring barrel and has a first groove. The mainspring barrel side plate also has a second groove. One end of the mainspring spring is inserted into the first groove of the mainspring barrel side plate, and the other end is inserted into the second groove of the mainspring shaft.

[0013] The transmission assembly is fixedly mounted above the top plate of the spring box;

[0014] The unfolding component is fixedly mounted above the transmission component.

[0015] Furthermore, the transmission assembly includes a bottom spring shaft gear, a middle reduction gear, and a top transmission gear;

[0016] The bottom mainspring shaft gear is fixed on the mainspring shaft, the middle reduction gear meshes with the bottom mainspring shaft gear, and the top transmission gear is connected to the middle reduction gear through the mainspring shaft.

[0017] Furthermore, the unfolding component includes an unfolding component base plate, an unfolding component pivot, and an unfolding component slider;

[0018] The base plate of the unfolding component is provided with four slides, the slide block of the unfolding component is placed in the slides, and there is a cylindrical protrusion on the top and right side of the slide block of the unfolding component. The rotating shaft of the unfolding component is provided with four slide grooves, which are connected to the cylindrical protrusion on the top of the slide block of the unfolding component.

[0019] Furthermore, the unlocking mechanism includes a fixing member, a clamping block slide rail, a clamping block, and a spring;

[0020] The fixing member is connected to the spring shaft, the clamping block slide rail is directly connected to the bottom plate of the outer casing, the clamping blocks are respectively disposed at both ends of the fixing member, and are connected to the bottom plate outer casing through the spring.

[0021] Furthermore, the crossbar type drag sail device is also provided with a guide rail partition and a guide railless partition inside, and both the guide rail partition and the guide railless partition are connected to the bottom plate of the outer shell.

[0022] Furthermore, the crossbar drag sail device is also provided with a connecting rod mechanism, which includes a T-shaped connecting rod and a guide rail connecting rod. The T-shaped connecting rod is connected to the protrusion on the right side of the slide block of the deployment component, and the guide rail connecting rod is connected to the guide rail partition and the guide rail of the T-shaped connecting rod.

[0023] Furthermore, the crossbar drag sail device also includes a sail box inside, and an adjustable height support column is provided at the top corner of the sail box near the outer wall.

[0024] Furthermore, the crossbar drag sail device is also provided with four isosceles right-angled triangular sail membranes, with the right-angle vertex of the sail membrane connected to the bottom of the sail box, and the other two vertices connected to the crossbar mechanism.

[0025] Furthermore, the crossbar drag sail device is also equipped with a hot knife on the bottom plate of the outer shell for melting and cutting the binding wire.

[0026] The beneficial effects of this invention are as follows: This invention provides a crossbar drag sail device, comprising a drag sail outer shell, an unlocking mechanism, a deployment mechanism, and a crossbar mechanism; the unlocking mechanism, deployment mechanism, and crossbar mechanism are all fixed inside the drag sail outer shell; the drag sail outer shell includes a top plate, a door plate, a bottom plate, and a door plate hinge, the door plate and the top plate are rotatably connected by the door plate hinge, and the bottom plate is disposed at the lower part of the drag sail outer shell. Therefore, for satellites with similar sizes, the deployment components of this invention are universal, resulting in higher modularity and better versatility; the deployment mechanism is fixedly disposed in the center of the bottom plate inside the drag sail outer shell, used for... The deployment process provides power and controls the deployment speed of the drag sail. The unlocking mechanism, connected to the outer shell panel via a binding wire passing through a hole in the lower part of the panel, releases the elastic potential energy stored in the deployment mechanism during the drag sail deployment process. The combined use of the unlocking mechanism and the deployment mechanism allows for passive and fully controllable deployment of the drag sail. The crossbar mechanism includes three types of bars, which are hinged together and connected to the deployment mechanism. No additional energy is required from the satellite during the entire deployment process; the entire process relies on the elastic potential energy stored in the deployment mechanism. Therefore, it places lower demands on the satellite's energy system and is applicable to a wider range of satellites. This alleviates the technical problem in existing technologies where drag sail devices lack passive and controllable deployment capabilities. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A three-dimensional structural diagram of a crossbar-type drag sail device in a folded state, provided for an embodiment of the present invention;

[0029] Figure 2 A three-dimensional structural diagram of a crossbar-type drag sail device in its deployed state, provided as an embodiment of the present invention;

[0030] Figure 3 This is a side view of the arrangement of the crossbars and deployment mechanism after deployment of a crossbar-type drag sail device provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the arrangement of the crossbars and the slide rail partition after the crossbars of the crossbar-type drag sail device are deployed, provided by an embodiment of the present invention.

[0032] Figure 5 A three-dimensional structural schematic diagram of an unlocking mechanism for a crossbar-type drag sail device provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of the top structure of the deployment mechanism of a crossbar drag sail device provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the internal structure of the spring box of a crossbar-type drag sail device provided in an embodiment of the present invention.

[0035] icon:

[0036] 1-Drag sail outer shell; 101-Top plate of outer shell; 102-Door panel of outer shell; 103-Bottom plate of outer shell; 104-Door panel hinge of outer shell;

[0037] 2- Deployment mechanism; 201- Mainspring barrel; 2011- Mainspring shaft; 2012- Mainspring spring; 2013- Mainspring barrel top plate; 2014- Mainspring barrel side plate; 2015- First groove; 2016- Second groove; 202- Transmission assembly; 2021- Bottom layer mainspring shaft gear; 2022- Middle layer reduction gear; 2023- Top layer transmission gear; 203- Deployment assembly; 2031- Deployment assembly base plate; 2032- Deployment assembly rotating shaft; 2033- Deployment assembly slider; 2034- Slide rail; 2035- Slide groove;

[0038] 3-Unlocking mechanism; 301-Fixed component; 302-Clamping block slide rail; 303-Clamping block; 304-Spring;

[0039] 401-Guide rail partition; 402-Guide railless partition; 403-Sail box; 4031-Support column;

[0040] 5-Connecting rod mechanism; 501-T-shaped connecting rod; 502-Guide rail connecting rod;

[0041] 6-Cross lever mechanism. Detailed Implementation

[0042] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] like Figures 1 to 7 As shown, this embodiment provides a crossbar drag sail device, which includes a drag sail shell 1, a deployment mechanism 2, an unlocking mechanism 3, and a crossbar mechanism 6; the deployment mechanism 2, the unlocking mechanism 3, and the crossbar mechanism 6 are all fixed inside the drag sail shell 1;

[0046] The drag sail shell includes a top shell plate 101, a door shell plate 102, a bottom shell plate 103, and a door shell hinge 104. The door shell plate 102 is rotatably connected to the top shell plate 101 via the door shell hinge 104. The bottom shell plate 103 is located at the bottom of the drag sail shell 1.

[0047] The deployment mechanism 2 is fixedly installed in the center of the bottom plate inside the drag sail shell 1, and is used to provide power for the deployment process and control the deployment speed of the drag sail.

[0048] The unlocking mechanism 3 is connected to the outer shell door panel 102 by passing a binding wire through a hole at the bottom of the outer shell door panel 102, and is used to release the elastic potential energy stored in the deployment mechanism during the deployment process of the drag sail device.

[0049] The crossbar mechanism 6 includes three types of bars, which are fixed to each other by hinges and connected to the unfolding mechanism 2.

[0050] The crossbar drag sail device provided by the present invention includes a drag sail shell 1, a deployment mechanism 2, an unlocking mechanism 3, and a crossbar mechanism 6. Preferably, in this exemplary embodiment, the drag sail shell 1 has an outer enclosure of a 102mm*102mm*85mm cuboid in the folded state. The deployment mechanism 2 enables the entire drag sail device to be deployed, causing the shell door to pop open and the sail membrane to unfold, increasing the satellite's surface-to-mass ratio. The unlocking mechanism 3 releases the elastic potential energy stored in the deployment mechanism during the entire deployment process. The crossbar mechanism 6 is used to pull the sail membrane to fully unfold.

[0051] like Figures 6 to 7 As shown, the unfolding mechanism 2 includes a spring box 201, a transmission assembly 202, and an unfolding assembly 203;

[0052] The mainspring barrel includes a mainspring shaft 2011, a mainspring spring 2012, a mainspring barrel top plate 2013, and a mainspring barrel side plate 2014. The mainspring shaft 2011 is fixed to the center of the mainspring barrel 201 and has a first groove 2015. The mainspring barrel side plate 2014 also has a second groove 2016. One end of the mainspring spring 2012 is inserted into the first groove 2015 of the mainspring barrel side plate 2014, and the other end is inserted into the second groove 2016 of the mainspring shaft 2011.

[0053] The transmission assembly 202 is fixedly disposed above the top plate 2013 of the spring box;

[0054] The unfolding component 203 is fixedly disposed above the transmission component 202;

[0055] The transmission assembly 202 includes a bottom spring shaft gear 2021, a middle reduction gear 2022, and a top transmission gear 2023;

[0056] The bottom mainspring shaft gear 2021 is fixed on the mainspring shaft 2011, the middle reduction gear 2022 meshes with the bottom mainspring shaft gear 2021, and the top transmission gear 2023 is connected to the middle reduction gear 2022 through the mainspring shaft 2011.

[0057] The unfolding component 203 includes an unfolding component base plate 2031, an unfolding component pivot 2032, and an unfolding component slider 2033;

[0058] The base plate 2031 of the unfolding component is provided with four slides 2034. The slide block 2033 of the unfolding component is placed in the slides 2034, and there is a cylindrical protrusion on the top and right side of the slide block 2033. The rotating shaft 2032 of the unfolding component is provided with four slide grooves 2035, which are connected to the slide block 2033 through the cylindrical protrusion on the top of the slide block 2033.

[0059] Specifically, the unfolding mechanism 2 consists of three parts. The first part is a mainspring shaft 2011, a mainspring spring 2012, a mainspring box top plate 2013, and a mainspring box side plate 2014, which together form a mainspring box 201 structure. One end of the mainspring spring 2012 is inserted into the second groove 2016 of the mainspring box side plate 2014, and the other end is inserted into the first groove 2015 of the mainspring shaft 2011. The elastic potential energy stored in the mainspring spring in the mainspring box 201 drives the mainspring shaft 2011 to rotate. The second part is a transmission assembly, which consists of a bottom mainspring shaft gear 2021, a middle reduction gear 2022, and a top transmission gear 2023. The gear sets work together, with the bottom spring shaft gear 2021 connected to the spring shaft 2011 and directly driven to rotate by the spring shaft 2011. Because the spring spring 2012 releases quickly, the bottom spring shaft gear 2021 first meshes with the middle reduction gear 2022, slowing down the rotational speed of the spring shaft. This speed is ultimately transmitted to the deployment assembly shaft 2032 via the top transmission gear 2023, reducing the rotational speed of the spring shaft 2011 and transmitting its torque to the third-part deployment assembly 203. The third part consists of... The assembly consists of an opening component base plate 2031, an unfolding component rotating shaft 2032, and an unfolding component slider 2033. The torque of the spring shaft 2011 is transmitted to the unfolding component rotating shaft 2032 through the second part. The unfolding component slider 2033 cooperates with the linear grooves of the unfolding component base plate 2031 and the unfolding component rotating shaft 2032, so that the rotational motion of the unfolding component rotating shaft 2032 drives the unfolding component slider 2033 to achieve linear motion along the linear groove. Ultimately, the slider achieves a linear motion of 20mm through a 50° rotation angle.

[0060] like Figure 5 As shown, the unlocking mechanism 3 includes a fixing member 301, a clamping block slide rail 302, a clamping block 303, and a spring 304;

[0061] The fixing member 301 is connected to the spring shaft 2011, the clamping block slide rail 302 is directly connected to the outer casing bottom plate 103, and the clamping blocks 303 are respectively disposed at both ends of the fixing member 301 and are fixed to the spring 304 by binding wire.

[0062] Specifically, its main components consist of a fixing member 301, a clamping block slide rail 302, a clamping block 303, and a spring 304. The function of the fixing member 301 is to tighten the spring 304, giving the spring 304 sufficient elastic potential energy. Then, the U-shaped clamping block 303 clamps the fixing member 301, and the clamping block 303 is tied tightly by binding wires through the cylindrical protrusions on both sides of the clamping block 303, preventing the fixing member 301 from rotating. At the same time, the U-shaped clamping block 303 is connected to the base plate by the spring 304. When the satellite issues a deployment command, the hot knife placed on the base plate melts the binding wires. The clamping block 303 is pulled by the spring 304 and restricted by the clamping block slide rail 302, moving in a straight line to release the fixing member 301, thereby realizing the rotation of the spring shaft 2011.

[0063] like Figures 2 to 4 As shown, the crossbar type drag sail device is also provided with a guide rail partition 401 and a guide railless partition 402 inside, and both the guide rail partition 401 and the guide railless partition 402 are connected to the bottom plate 103 of the outer shell.

[0064] The crossbar drag sail device is also provided with a connecting rod mechanism 5, which includes a T-shaped connecting rod 501 and a guide rail connecting rod 502. The T-shaped connecting rod 501 is connected to the protrusion on the right side of the slide block 2033 of the deployment component, and the guide rail connecting rod 502 is connected to the guide rail partition 401 and the guide rail of the T-shaped connecting rod 501.

[0065] The crossbar type drag sail device is also equipped with a sail box 403 inside, and an adjustable height support column 4031 is also provided at the top corner of the sail box 403 near the outer side wall.

[0066] The crossbar drag sail device is also equipped with four isosceles right-angled triangular sail membranes. The right-angle vertices of the sail membranes are connected to the bottom of the sail box 403, and the other two vertices are connected to the crossbar mechanism 6.

[0067] Specifically, the storage position of the crossbar mechanism 6 is between the guide rail partition 401 and the guide rail-free partition 402. This provides a more ideal working environment for the crossbar mechanism 6 and also restricts its position, preventing large lateral displacement under vibration conditions. The arrangement of the guide rail partition 401, T-shaped connecting rod 501, guide rail connecting rod 502, and crossbar mechanism 6 is shown. The end of the crossbar mechanism 6 is hinged to the guide rail partition 401, retaining only the degree of freedom of the crossbar mechanism 6 around the plane perpendicular to the partition. Simultaneously, the first section of the crossbar mechanism 6 is connected to the guide rail connecting rod 502. Since the guide rail connecting rod 502 cooperates with the groove of the guide rail partition 401, its movement is also restricted by the groove. Therefore, when the protruding end of the guide rail connecting rod 502 moves along the circular groove, the first section of the crossbar mechanism 6 can rotate around the end hinge point, thereby driving the entire crossbar mechanism 6 to unfold and fold. The protruding end of the guide rail connecting rod 502 simultaneously engages with the sliding groove of the T-shaped connecting rod 501, allowing the movement of the guide rail connecting rod 502 to be driven by the linear motion of the unfolding component slider 2033. This establishes a transmission relationship between the unfolding mechanism and the crossbar mechanism 6. The crossbar mechanism 6 is an asymmetrical design, meaning that the rod ends have protrusions of different widths and the same as the crossbars, used for connecting with other rods. In the folded state, this crossbar mechanism 6 can achieve higher space utilization.

[0068] After the unlocking mechanism is activated, the outer shell door panel 102 is raised by the torsion spring at the outer shell door panel hinge 104. Subsequently, the unfolding assembly 203 is rotated by the spring box 201, causing the crossbar mechanism 6 to extend. After unfolding, the crossbar mechanism 6 extends from the middle of the drag sail 15mm off-center, exhibiting a slight asymmetry. Therefore, an isosceles right-angled triangular sail membrane can still be selected. The right-angle vertex of the sail membrane is connected to the bottom of the sail box 403, and the other two vertices are connected to the crossbar mechanism 6. Moreover, the height of the sail box 403 depends on the adjustable height support column 4031 of the sail box. With the height difference created here, the drag sail can achieve a certain degree of adjustable aerodynamic self-stability.

[0069] The crossbar drag sail device provided by the present invention also has a hot knife on the bottom plate of the outer shell for melting and cutting the binding wire.

[0070] Specifically, when the satellite issues a deployment command, the hot knife placed on the base plate melts the binding wire, and the clamp 303, due to the traction of the spring 304 and the restriction of the clamp slide rail 302, moves in a straight line to release the fixing member 301, thereby realizing the rotation of the spring shaft 2011.

[0071] The crossbar drag sail device provided by this invention uses a crossbar mechanism 6, which differs from the elastic or bistable support rods used in conventional drag sails. This makes the drag sail device more modular, and the support stiffness of the crossbar mechanism 6 is also superior to that of conventional elastic or bistable support rods. In a larger arrangement space, it can achieve a longer support rod length than conventional drag sails, thereby increasing the effective area of ​​the sail membrane. At the same time, by adjusting the position of the sail box 403, this drag sail can form different degrees of aerodynamic self-stabilizing characteristics to meet different mission requirements and reduce the requirements on the satellite attitude control system. Furthermore, the crossbar drag sail device provided by this invention can simultaneously achieve energy-free deployment and a controllable deployment process, thus avoiding the shortcomings of existing drag sails.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A crossbar resistance sail device, characterized in that, The resistance sail shell (1), the unfolding mechanism (2), the unlocking mechanism (3) and the cross rod mechanism (6); the unfolding mechanism (2), the unlocking mechanism (3) and the cross rod mechanism (6) are all fixed in the resistance sail shell (1); The resistance sail shell includes a shell top plate (101), a shell door plate (102), a shell bottom plate (103) and a shell door plate hinge (104), the shell door plate (102) is rotatably connected with the shell top plate (101) through the shell door plate hinge (104), and the shell bottom plate (103) is arranged at the bottom of the resistance sail shell (1); The unfolding mechanism (2) is fixedly arranged at the central bottom plate in the resistance sail shell (1) and is used for providing power for the unfolding process and controlling the unfolding speed of the resistance sail; The unlocking mechanism (3) is connected with the shell door plate (102) through a binding line passing through a hole in the lower part of the shell door plate (102) and is used for releasing the elastic potential energy stored in the unfolding mechanism for the unfolding process of the resistance sail device; The cross rod mechanism (6) includes three rods, the rods are fixed with each other through hinging and are connected with the unfolding mechanism (2); The unfolding mechanism (2) includes a clockwork box (201), a transmission assembly (202) and an unfolding assembly (203); The clockwork box includes a clockwork shaft (2011), a clockwork spring (2012), a clockwork box top plate (2013) and a clockwork box side plate (2014), the clockwork shaft (2011) is fixed at the central position in the clockwork box (201) and is provided with a first groove (2015), the clockwork box side plate (2014) is also provided with a second groove (2016), one end of the clockwork spring (2012) is inserted into the first groove (2015) in the clockwork box side plate (2014), and the other end is inserted into the second groove (2016) in the clockwork shaft (2011); The transmission assembly (202) is fixedly arranged above the clockwork box top plate (2013); The unfolding assembly (203) is fixedly arranged above the transmission assembly (202); The unfolding assembly (203) includes an unfolding assembly bottom plate (2031), an unfolding assembly rotating shaft (2032) and an unfolding assembly sliding block (2033); The unfolding assembly bottom plate (2031) is provided with four sliding channels (2034), the unfolding assembly sliding block (2033) is placed in the sliding channel (2034), the top and the right side of the unfolding assembly sliding block (2033) are each provided with a cylindrical protrusion, and the unfolding assembly rotating shaft (2032) is provided with four sliding grooves (2035) and is connected with the cylindrical protrusion on the top of the unfolding assembly sliding block (2033) through the sliding grooves (2035); The unlocking mechanism (3) includes a fixing piece (301), a clamping block sliding rail (302), a clamping block (303) and a spring (304); The fixed part (301) is connected with the clockwork shaft (2011), the clamping block slide rail (302) is directly connected with the shell bottom plate (103), the clamping blocks (303) are respectively arranged at two ends of the fixed part (301) and connected with the shell bottom plate (103) through the springs (304); The cross rod type resistance sail device is internally provided with guide rail partitions (401) and non-guide rail partitions (402), and the guide rail partitions (401) and the non-guide rail partitions (402) are connected with the shell bottom plate (103); The cross rod type resistance sail device is further provided with a connecting rod mechanism (5), the connecting rod mechanism comprises a T-shaped connecting rod (501) and a guide rail connecting rod (502), the T-shaped connecting rod (501) is connected with a protrusion on the right side surface of the unfolding assembly slide block (2033), and the guide rail connecting rod (502) is connected with guide rails of the T-shaped connecting rod (501) and the guide rail partitions (401).

2. A crossbar resistance sail device according to claim 1, characterised in that, The transmission assembly (202) comprises a bottom clockwork shaft gear (2021), a middle layer speed reduction gear (2022) and a top layer transmission gear (2023); The bottom clockwork shaft gear (2021) is fixed on the clockwork shaft (2011), the middle layer speed reduction gear (2022) is in mesh with the bottom clockwork shaft gear (2021), and the top layer transmission gear (2023) is connected with the middle layer speed reduction gear (2022) through the clockwork shaft (2011).

3. A crossbar resistance sail device according to claim 1, wherein, The cross rod type resistance sail device is internally provided with a sail box (403), and the sail box (403) is provided with height-adjustable support columns (4031) near top corners of outer side walls.

4. A crossbar resistance sail device according to claim 3, wherein, The cross rod type resistance sail device is further provided with four isosceles right triangle sail membranes, a right angle vertex of the sail membrane is connected with the bottom of the sail box (403), and the other two vertices are connected with the cross rod mechanism (6).

5. A crossbar resistance sail device according to claim 1, wherein, The cross rod type resistance sail device is further provided with a hot knife on the shell bottom plate, for fusing binding wires.

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