Multi-ring peripheral parallel networking antenna based on double scissor units

Abstract

The invention discloses a multi-annular peripheral parallel networking antenna based on a double-scissor unit, and relates to the technical field of spaceflight, the multi-annular peripheral parallel networking antenna is composed of nineteen hexagonal prism module units with the same configuration and size, each hexagonal prism module unit is regarded as an annular peripheral antenna, and the whole antenna is formed by connecting the module units in parallel. The module units are connected through connecting units, each hexagonal prism module unit is composed of six groups of double-scissor units which are completely consistent in configuration and size, and drivers of the double-scissor units are located at six corners of each module. According to the technical scheme, reference value can be provided for design of the ultra-large-diameter paraboloid load antenna, meanwhile, decoupling in the unfolding process is facilitated, simple paraboloid antenna design is expanded, the antenna can adapt to high working frequency and has wide frequency band, and the antenna is suitable for large-scale popularization and application. And the reconnaissance resistance of the antenna is enhanced through a frequency hopping communication technology and a spread spectrum communication technology.

Description

Technical Field

[0001] The invention relates to the field of aerospace technology, and in particular to a multi-annular peripheral parallel networking antenna based on double scissor units. Background Art

[0002] Large-scale deployable space antenna structures are one of the research directions that have developed rapidly in recent years. They are key equipment supporting large space antennas. Due to their special applications in resource exploration, military early warning, and deep space exploration, measurement, control, and communication, as well as the huge difficulty in their development, they have become one of the yardsticks for measuring the aerospace capabilities of a major space power. Large-scale deployable space antenna structures have great strategic significance for a country's social economy and national security, and have become a hot spot that countries are competing to study and deploy. my country will need to launch dozens of satellites in the next ten years for future national aerospace exploration, communications, electronic reconnaissance, navigation, remote sensing, earth observation, and deep space exploration. Due to the long distance, the signals received by the satellite are weak, requiring the onboard antenna to have a larger aperture to obtain a higher gain.

[0003] In order to obtain faster and higher-quality signal transmission capabilities, communication satellites need to carry large-aperture satellite antennas to meet the needs. In addition, in order to transmit high-power continuous microwaves from the geosynchronous orbit to the ground, space solar power stations need ultra-large antennas with a diameter of hundreds of meters. Satellite antennas with high gain and strong directivity have far-reaching application prospects on military satellites because of their strong anti-interference ability. The frequency hopping communication technology and spread spectrum communication technology used to enhance the anti-reconnaissance ability of the antenna require the antenna to adapt to higher operating frequencies and have a wider frequency band. These needs naturally put forward higher requirements on future satellite antennas. To address the above problems, a multi-ring peripheral parallel networking antenna based on double scissor units is proposed. Summary of the invention

[0004] The object of the present invention is to provide a multi-ring peripheral parallel networking antenna based on double scissor units to solve the problems raised by the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-annular peripheral parallel networking antenna based on double scissor units, which is composed of nineteen hexagonal prism module units with exactly the same configuration and size, each of which is regarded as a ring-shaped peripheral antenna, and the entire antenna is formed by connecting the module units in parallel, and the module units are connected by connecting units, each of which is composed of six groups of double scissor units with exactly the same configuration and size, and the drive of the double scissor units is located at the six corners of each module. According to the working mode of the connecting unit, the connecting unit can be divided into two categories with a total of five connecting units, and the connecting units of the same type have the same configuration but different sizes;

[0006] The deployment of the multi-annular peripheral parallel networking antenna of the double scissor unit is divided into two mutually decoupled stages. In the first stage, only each module unit performs the deployment movement, and the angle of each double scissor unit in the same module unit remains unchanged, and the synchronous deployment movement is performed. The movement in the first stage is a plane deployment, and each vertex in the upper and lower surfaces of each module unit always remains coplanar, which serves to expand the antenna aperture. In the second stage, only each connection unit performs the deployment movement. The deployment movement in the second stage is a spatial movement. The connection units are mutually spread out so that each module unit is connected in parallel and forms a specific angle, which serves to make the antenna open into a desired geometric shape.

[0007] The module units can be divided into two types according to the generation method and geometric position: topology type one module and topology type two module. The six topology type two modules close to the central module are generated by rotating the central module, and the six topology type two modules far from the central module are generated by the topology type two modules close to the central module in the same way, and the outer topology type one modules are generated by reversely generating the outer topology type two modules.

[0008] The connection units are divided into two types according to their working methods. The first type only includes one style of first type connection units. When unfolded, the angle between the plane where they are located and the adjacent module units remains unchanged. The second type includes second type connection units, and is divided into four styles: second type connection unit type one, second type connection unit type two, second type connection unit type three, and second type connection unit type four. They are not only unfolded within the plane where they are located, but also there is relative rotation between the plane where they are located and the module units connected to them. The second type connection units include second type connection unit side rods, second type connection unit transfer side rods, second type connection unit rotation female hinges, and second type connection unit connections. The second type connection unit side rods are connected with multiple second type connection unit rotation male hinges, which can realize rotation around their own symmetry axes. When unfolded, the angle between the plane where they are located and the adjacent module units changes.

[0009] Preferably, the first type of connecting unit includes a first type of connecting unit side rod, an upper rotating module of the connecting unit scissors-fork mechanism, a lower sliding module of the connecting unit scissors-fork mechanism, a sliding limit of the connecting unit scissors-fork mechanism, a first type of connecting unit connection, a connecting unit upper and lower rod connecting piece, a connecting unit upper rod, a connecting unit lower rod, a connecting unit locking claw, a connecting unit driving spring, a connecting unit driving spring limit, an upper scissors-fork rod of the connecting unit scissors-fork mechanism, a lower scissors-fork rod of the connecting unit scissors-fork mechanism, a scissors-fork rod transition of the connecting unit scissors-fork mechanism, and a central hinge of the connecting unit scissors-fork mechanism. The connecting unit is an isosceles trapezoid in the unfolded state and an elongated rectangle in the folded state. The plane where the first type of connecting unit is located and the module units connected to it do not generate relative rotation during the unfolding process. The first type of connecting units are all fixedly connected to the module units. The scissors-fork mechanism in the middle of the connecting unit is used to ensure that the entire unit has a single degree of freedom during the unfolding process.

[0010] Preferably, there is a scissors-fork mechanism in the middle of the connecting unit, which is used to ensure that the entire connecting unit unfolding process is a single-degree-of-freedom unfolding. The entire unfolding process of the connecting unit is carried out by the connecting unit driving spring driving the lower sliding module of the connecting unit scissors-fork mechanism. At the same time, the upper and lower parts of the connecting unit are both provided with connecting unit locking claws for automatically locking after being unfolded into place.

[0011] Preferably, each module unit of the antenna is provided with a cable net matched with six double scissor units at its edge to form a rigid-flexible coupling structure therewith. The cable net structure is composed of a front cable net, a tension array and a back cable net. The antenna relies on the front cable net attached to each module unit to form a working surface. The front cable net profiles of module units located at different positions are slightly different. A plurality of module units are connected in parallel to form a parabolic working surface. Each point on the upper surface of each module unit is located on a spherical surface fitted by the working surface. The front cable net of each module unit and the folding and unfolding mechanism are connected via a certain compensating connection to compensate for errors.

[0012] Preferably, the connecting unit locking claw comprises a connecting unit locking claw male hinge, a connecting unit locking claw female hinge, a connecting unit locking claw locking rod, a locking rod rotating shaft, a locking rod actuating torsion spring, a connecting unit locking claw driving coil spring, a connecting unit locking claw rotating shaft, and a connecting unit locking claw fixing nut. The thickness direction dimension of the antenna remains unchanged during the deployment process. The module unit is a slender hexagonal prism when folded. The entire antenna is a low columnar structure formed by connecting units connected in parallel during the folding process.

[0013] Preferably, the double scissors-fork unit includes a sliding rod, a central sliding module, a short side sliding module group, a long side sliding module group, a pushing rod, a module corner connector, a central scissors-fork mechanism connector, a side scissors-fork mechanism connector, a double scissors-fork unit driving spring and a sliding module limiter. A single scissors-fork mechanism is respectively arranged on two different parallel axes on the sliding rod to realize the staggered placement of the front and rear central scissors-fork mechanisms on the same double scissors-fork unit. A part of the short side sliding module group and the long side sliding module group are respectively arranged on the two axes on the two sliding rods at the edge of the double scissors-fork unit, and the other part is connected to the sliding rod at the edge of the adjacent double scissors-fork unit to realize the synchronous deployment of the same module unit.

[0014] Preferably, the single scissors-fork mechanism comprises a single scissors-fork mechanism hinge, a single scissors-fork mechanism scissor rod, and a single scissors-fork mechanism scissor rod edge connector, and the single scissors-fork mechanism hinge can enable four single scissors-fork mechanism scissor rods in the single scissors-fork mechanism to rotate coaxially.

[0015] Preferably, the single scissors-fork mechanism hinge includes a single scissors-fork mechanism half-hinge, a single scissors-fork mechanism rotating shaft, a single scissors-fork mechanism bearing, and a bearing retaining ring. The single scissors-fork mechanism half-hinge allows the connected single scissors-fork mechanism scissor rods to rotate around the single scissors-fork mechanism rotating shaft. The single scissors-fork mechanism rotating shaft, as the rotating body, can cooperate with the bearing retaining ring to realize the placement of the single scissors-fork mechanism bearing.

[0016] Preferably, the central sliding module comprises a central sliding module sliding body, a central sliding module adapter plate, a central sliding module upper double hinge, and a central sliding module bottom plate. The central sliding module sliding body can enable the central sliding module to maintain good coaxiality while sliding on the sliding rod.

[0017] Preferably, the short side sliding module group includes a side sliding module sliding body, a short side sliding module group adapter plate, a single hinge on the upper part of the side sliding module, and a side sliding module bottom plate. Each of the short side sliding module groups includes two side sliding module sliding bodies with an angle of 60°, which can maintain good coaxiality with the sliding rods on two adjacent double scissors units. The long side sliding module group adapter plate included in the long side sliding module group is different from the short side sliding module group adapter plate in terms of length and notch angle arrangement.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, a multi-ring peripheral parallel networking antenna based on a double scissor unit comprises 19 module units of exactly the same configuration and size and different connection units connected between the module units, the unfolded aperture is not less than 50m, the storage cross-sectional diameter is about 5.1m, the module unit is a hexagonal prism structure based on the double scissor unit, different module units are connected to each other through different types of connection units, the aperture expansion and profile formation of the antenna are divided into two mutually decoupled stages through the module unit mechanism and the connection unit mechanism, and in the first stage of unfolding, only the module units are unfolded in the same plane , in order to realize the expansion of the antenna aperture, in the second stage of deployment, only the connection units are spatially deployed, so that the vertices of each module unit are located on the same sphere, and the connection units are mutually stretched so that the module units are connected in parallel and form a specific angle, which is used to make the antenna open into a required geometric shape. The technical solution of the present invention can provide reference value for the design of ultra-large aperture parabolic load antennas, and is also conducive to the decoupling of the deployment process and the expansion of simple parabolic antenna design, so that the antenna can adapt to higher operating frequencies and have a wider frequency band, thereby enhancing the anti-reconnaissance ability of the antenna through frequency hopping communication technology and spread spectrum communication technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the deployment of a multi-ring peripheral parallel networking antenna based on a double scissor unit in the present invention;

[0021] Figure 2 It is a schematic diagram of the folding and unfolding mechanism of the multi-annular peripheral parallel networking antenna based on the double scissor-fork unit in the present invention;

[0022] Figure 3 It is a schematic diagram of the intermediate stage of antenna deployment in the present invention;

[0023] Figure 4 It is a schematic diagram of the division of topological types of antenna module units in the present invention;

[0024] Figure 5 It is a schematic diagram of the connection unit type in the present invention;

[0025] Figure 6 It is a schematic diagram of the cable network of the module unit in the present invention;

[0026] Figure 7 It is a schematic diagram of the deployment of the double scissor unit in the present invention;

[0027] Figure 8 It is a schematic diagram of the folding of the double scissor units in the present invention;

[0028] Fig. 9 It is a schematic diagram of the mutual connection and driving configuration of the double scissor units in the present invention;

[0029] Fig.10 It is a schematic diagram of a single scissor mechanism in the present invention;

[0030] Fig.11 It is a schematic diagram of the central hinge of the single scissor mechanism in the present invention;

[0031] Fig.12 is a schematic diagram of a module corner connector in the present invention;

[0032] Fig.13 It is a schematic diagram of the central scissor mechanism connecting member in the present invention;

[0033] Fig.14 It is a schematic diagram of the side scissor-fork mechanism connecting member in the present invention;

[0034] Fig.15 It is a schematic diagram of the central sliding module in the present invention;

[0035] Fig.16 It is a schematic diagram of the short side sliding module group in the present invention;

[0036] Fig.17 It is a schematic diagram of the long side sliding module group of the present invention;

[0037] Fig.18 It is a schematic diagram of the adapter plate of the short side sliding module group in the present invention;

[0038] Fig.19 It is a schematic diagram of the adapter plate of the long side sliding module group of the present invention;

[0039] Fig. 20 It is a schematic diagram of the expansion of the first type of connection unit in the present invention;

[0040] Fig.21 This is a schematic diagram of the folding of the first type of connection unit in the present invention;

[0041] Fig. 22 It is a schematic diagram of the expansion of the second type of connection unit in the present invention;

[0042] Fig.23 This is a schematic diagram of the folding of the second type of connection unit in the present invention;

[0043] Fig.24 is a schematic diagram of the connection between the second type of connection unit and the double scissor unit in the present invention;

[0044] Fig.25 This is a schematic diagram of the locking claws of the connection unit in the present invention;

[0045] Fig.26 It is a schematic diagram of the upper and lower rod connecting pieces of the connecting unit in the present invention;

[0046] Fig. 27 This is a schematic diagram of the locking claw male hinge of the connection unit in the present invention;

[0047] Fig.28 It is a schematic diagram of the locking claw mother hinge of the connection unit in the present invention.

[0048] In the figure: 01, topology type one module; 02, topology type two module; 11, first type connection unit; 21, second type connection unit type one; 22, second type connection unit type two; 23, second type connection unit type three; 24, second type connection unit type four; 31, front cable net; 32, tension array; 33, back cable net; 001, single scissor mechanism; 002, sliding rod; 003, center sliding module; 004, short side sliding module group; 005, long side sliding module group; 006, push rod; 007, module corner connector; 008, center scissor mechanism connector; 009, side scissor mechanism connector; 010, double scissor unit driving spring; 011, sliding module limit; 0011, single scissor mechanism hinge; 0012, single scissor mechanism scissor rod; 0013, single scissor mechanism scissor rod edge connector; 00111, single scissor mechanism half hinge; 00112, single scissor mechanism rotation axis; 00113, single scissor mechanism bearing; 00114, bearing retaining ring; 0031, center sliding module sliding body; 0032, center sliding module adapter plate; 0033, center sliding module upper double hinge; 0034, center sliding module bottom plate; 0041, side sliding module sliding body; 0042, short side sliding module group adapter plate; 0043, side sliding module upper single hinge; 0044, Side sliding module bottom plate; 0052, long side sliding module group adapter plate; 101, first type connection unit side rod; 102, connection unit scissors mechanism upper rotation module; 103, connection unit scissors mechanism lower sliding module; 104, connection unit scissors mechanism sliding limit; 105, first type connection unit connection; 106, connection unit upper and lower rod connector; 107, connection unit upper rod; 108, connection unit lower rod; 109, connection unit locking claw; 110, connection unit drive spring; 111, connection unit drive spring limit; 112, connection unit scissors mechanism upper scissors rod; 113, connection unit scissors mechanism lower scissors rod; 114, connection unit Scissors-fork mechanism scissors-fork rod conversion; 115, connecting unit scissors-fork mechanism center hinge; 201, second type connecting unit side rod; 202, second type connecting unit rotating male hinge; 203, second type connecting unit conversion side rod; 204, second type connecting unit rotating female hinge; 205, second type connecting unit connection; 1091, connecting unit locking claw male hinge; 1092, connecting unit locking claw female hinge; 1093, connecting unit locking claw locking rod; 1094, locking rod rotating shaft; 1095, locking rod actuating torsion spring; 1096, connecting unit locking claw driving coil spring; 1097, connecting unit locking claw rotating shaft; 1098, connecting unit locking claw fixing nut. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] Example 1: Reference Figure 1 - Figure 5 As shown: a multi-ring peripheral parallel networking antenna based on double scissor units, composed of 19 hexagonal prism module units with exactly the same configuration and size, with a diameter of not less than 50m, each hexagonal prism module unit is regarded as a ring peripheral antenna, and the entire antenna is formed by connecting the module units in parallel, and the module units are connected by connecting units. Each hexagonal prism module unit is composed of six groups of double scissor units with exactly the same configuration and size. The drive of the double scissor unit is located at the six corners of each module. According to the working mode of the connecting unit, the connecting unit can be divided into two categories with a total of five types of connecting units. The same type of connecting units have the same configuration but different sizes.

[0051] The deployment of the multi-ring peripheral parallel networking antenna of the double scissor unit is divided into two mutually decoupled stages. In the first stage, only each module unit performs the deployment movement (the deployment of the first stage is the antenna from the folded state to the deployed intermediate state. In this deployment stage, each module unit performs a planar deployment movement. During the deployment process, the upper and lower vertices of each module unit remain coplanar with each other. The role of the deployment in this stage is to expand the plane aperture). The angles of the double scissor units in the same module unit remain unchanged, and the deployment movement is synchronized. The movement in the first stage is a planar deployment. The vertices on the upper and lower surfaces of each module unit always remain coplanar. Its role is to expand the plane aperture. The antenna aperture is expanded. In the second stage, only the connection units perform the expansion movement. The expansion movement in the second stage is a spatial movement. The connection units are mutually spread out so that the module units are connected in parallel and form a specific angle. The function of the expansion movement is to make the antenna expand into a desired geometric shape (the expansion in the second stage is from the intermediate state of the expansion to the fully expanded state of the antenna. The expansion in this stage is the spatial expansion movement between the connection units. The movement process is the expansion of the connection unit in the plane where it is located and the relative rotation between the module unit and the symmetry axis around the side rod 201 of the second type of connection unit. The function of the expansion in this stage is to make the antenna working surface expand into the desired parabola).

[0052] The module units can be divided into two types according to the generation method and geometric position: topology type one module 01 and topology type two module 02. The six topology type two modules 02 close to the central module are generated by rotating the central module, and the six topology type two modules 02 far from the central module are generated by the topology type two modules 02 close to the central module in the same way, and the outer topology type one module 01 is generated in reverse from the outer topology type two module 02 (the most central module is the topology type one module 01, and the central module is rotated along the perpendicular direction of its edge around the parabola to form the center of the sphere to form the inner topology type two module 02 close to the central module, and each inner topology type two module 02 is rotated along the rotation direction by the same angle to form the outer topology type two module 02 far from the central module, and each outer topology type two module 02 is rotated in the clockwise direction along the corresponding edge in the same way as the central module to generate the inner topology type two module 02 to generate the outer topology type one module 01);

[0053] The connection units are divided into two types according to their working methods. The first type includes only one type of first type connection unit 11, which is only unfolded in the plane where it is located. When unfolded, the angle between the plane where it is located and the adjacent module unit remains unchanged. The second type includes the second type connection unit, which is divided into four types: second type connection unit type one 21, second type connection unit type two 22, second type connection unit type three 23, and second type connection unit type four 24. It is not only unfolded in the plane where it is located, but also there is relative rotation between the plane where it is located and the module unit connected to it. The second type connection unit includes a second type connection unit side rod 201, a second type connection unit transfer side rod 203, a second type connection unit rotation female hinge 204, and a second type connection unit connection 205. A plurality of second type connection unit rotation male hinges 202 are connected to the second type connection unit side rod 201, which can realize rotation around its own symmetry axis. When unfolded, the angle between the plane where it is located and the adjacent module unit changes;

[0054] In this embodiment, in the deployed state, multiple module units of the antenna are connected in parallel so that the working surface formed by the respective front cable nets 31 is a parabola, and the corner vertices of the module units close to the working surface are all located on the same spherical surface fitted from the parabola. The folded state of the antenna is composed of multiple slender hexagonal prism module units connected in parallel through connecting units. The whole is a low columnar structure with a height slightly higher than 3m and a folded envelope section diameter of less than 5.1m.

[0055] Embodiment 2: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0056] In this embodiment, refer to Figure 6Each module unit of the antenna is equipped with a cable net that matches with the six double scissor units on its edge to form a rigid-flexible coupling structure. The cable net structure is composed of a front cable net 31, a tension array 32 and a back cable net 33. The antenna relies on the front cable net 31 attached to each module unit to form a working surface. The front cable net 31 of the module units at different positions has slightly different profiles. After multiple module units are connected in parallel, a parabolic working surface is formed. Each point on the upper surface of each module unit is located on the spherical surface fitted by the working surface. The front cable net 31 of each module unit is connected to the folding and unfolding mechanism through a certain compensation connection to compensate for the error; The force array 32 can stretch the front cable net 31 and the back cable net 33 into the required shape, and provide a certain tensioning force for the cable net to improve the stability of the cable net system. The back cable net 33 provides corresponding support for the tensioning of the front cable net 31 of the antenna and the maintenance of the mechanical properties of the entire cable net structure. Since the spherical surface where the vertices of each module unit of the antenna are located is fitted from the working surface, there is a certain error between the two. Therefore, a corresponding compensation mechanism is also required between the front cable net 31 and the back cable net 33 and the double scissors unit to compensate for the error between the upper surface of the antenna folding and unfolding mechanism and the working surface, that is, the error between the spherical surface and the parabolic working surface.

[0057] Embodiment 3: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0058] In this embodiment, refer to Figure 7 and Figure 8 The double scissor unit includes a sliding rod 002, a central sliding module 003, a short side sliding module group 004, a long side sliding module group 005, a push rod 006, a module corner connector 007, a central scissor mechanism connector 008, a side scissor mechanism connector 009, a double scissor unit drive spring 010 and a sliding module limit 011. A single scissor mechanism 001 is placed on each of the two different parallel axes on the sliding rod 002 (two sliding axes on the sliding rod 002 that are parallel to each other and keep a certain distance), so as to realize the front and rear center of the same double scissor unit. The central scissor mechanism is staggered (the single scissor mechanism 001 of the same double scissor unit is divided into two parts that do not interfere with each other in forward and backward movement), and the two axes on the two sliding rods 002 at the edge of the double scissor unit are respectively provided with a part of the short side sliding module group 004 and the long side sliding module group 005, and the other part is connected to the sliding rod 002 at the edge of the adjacent double scissor unit, so as to realize the synchronous expansion of the same module unit, and the three single scissor mechanisms 001 on the same side connected by the central sliding module 003 can realize synchronous movement and expansion through the two hinges on the central sliding module 003;

[0059] In this embodiment, each double scissor-fork unit contains six single scissor-fork mechanisms 001 connected in two groups of three by three and staggered forward and backward. The vertices at one end of the outer sides of the four single scissor-fork mechanisms 001 on the edge are connected to the short side sliding module group 004 or the long side sliding module group 005 through a hinge, which can realize the composite movement of sliding orthogonal to the movement axis and axial rotation. The vertices at the other end are connected to the side scissor-fork mechanism connecting piece 009 through a hinge, which can realize the rotation around the hinge axis. One end of the two single scissor-fork mechanisms 001 in the middle is connected to the central sliding module 003 through a hinge, which can realize the composite movement of sliding orthogonal to the movement axis and axial rotation. The other end is connected to the side scissor-fork mechanism connecting piece 009 through a hinge, which can realize the rotation around the hinge axis.

[0060] In this embodiment, refer to Fig. 9 , the corresponding single scissor mechanisms 001 of two adjacent double scissor units share the same short side sliding module group 004 or long side sliding module group 005, wherein the short side sliding module group 004 is arranged on the sliding rod 002 close to the center of the module unit, and the long side sliding module group 005 is arranged on the sliding rod 002 far away from the center of the module unit, and the short side sliding module group 004 and the long side sliding module group 005 are moved by the double scissor unit driving springs 010 arranged on the two front and rear push rods 006 between the two module corner connectors 007. The movement directions of the two double scissor unit driving springs 010 are opposite, which can realize the up and down staggered movement of the short side sliding module group 004 and the long side sliding module group 005. At the same time, the short side sliding module group 004 and the long side sliding module group 005 can make the two connected single scissor mechanisms 001 located on different double scissor units realize synchronous expansion, and then realize the synchronous expansion of the entire module unit through the closed-loop connection of the double scissor units;

[0061] In this embodiment, refer to Fig.10 The single scissor mechanism 001 includes a single scissor mechanism hinge 0011, a single scissor mechanism scissor rod 0012, and a single scissor mechanism scissor rod edge connector 0013. The single scissor mechanism hinge 0011 can make the four single scissor mechanism scissor rods 0012 in the single scissor mechanism 001 rotate around the same axis, and staggered when stored, so as to reduce the space required for storage. All the single scissor mechanism scissor rods 0012 of the antenna are hollow tubular rods with a certain length. Therefore, the unfolding process of each single scissor mechanism 001 is exactly the same. The single scissor mechanism scissor rod edge connector 0013 has two non-intersecting mutually perpendicular staggered axes to realize the rotation of the single scissor mechanism 001 and the composite motion of rotation and sliding.

[0062] In this embodiment, refer to Fig.11The single scissor mechanism hinge 0011 includes a single scissor mechanism half hinge 00111, a single scissor mechanism rotation axis 00112, a single scissor mechanism bearing 00113, and a bearing retaining ring 00114. The single scissor mechanism half hinge 00111 enables the connected single scissor mechanism scissor rod 0012 to rotate around the single scissor mechanism rotation axis 00112, and at the same time realize mutual staggering when stored. The single scissor mechanism rotation axis 00112 as the rotating main body can cooperate with the bearing retaining ring 00114 to realize the placement of the single scissor mechanism bearing 00113.

[0063] In this embodiment, refer to Fig.12 - Fig.14 , the module corner connector 007 has five through holes with axes parallel to each other but kept at a certain distance, of which four symmetrical through holes will be connected to the sliding rods 002 of different double scissor units, so as to fix the adjacent double scissor units, and the axis located on the symmetry plane is used to connect with the first type of connection unit 11, and then the connection between different module units is realized through the first type of connection unit 11, and the inner hole of the tubular interface with the axis located in front and behind on the symmetry plane is used to fix one end of the push rod 006, and the outer side is used to fix the double scissor unit drive spring 010, so as to realize the expansion drive of the module unit;

[0064] In this embodiment, the central scissors-fork mechanism connector 008 is installed on one side of the two middle sliding rods 002 of the double scissors-fork unit, and there is a rotating hinge on both sides thereof, which can make the plane where the corresponding central sliding rod 002 is located remain parallel when the double scissors-fork unit is unfolded, and the side scissors-fork mechanism connector 009 has two mutually orthogonal axes, which is used to connect the single scissors-fork mechanism 001 at the edge of the double scissors-fork unit so that the plane where the corresponding edge sliding rod 002 is located remains parallel to the plane where the central sliding rod 002 is located when the double scissors-fork unit is unfolded.

[0065] Embodiment 4: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0066] In this embodiment, refer to Fig.15The central sliding module 003 comprises a central sliding module sliding body 0031, a central sliding module adapter plate 0032, a central sliding module upper double hinge 0033, and a central sliding module bottom plate 0034. The central sliding module sliding body 0031 can make the central sliding module 003 slide on the sliding rod 002 while maintaining good coaxiality. The central sliding module adapter plate 0032 can connect the central sliding module upper double hinge 0033 with the central sliding module sliding body 0031 through its internal opening. There are two mutually parallel axes on the central sliding module upper double hinge 0033, which can be connected to the single scissor mechanism 001 through hinges to realize the rotation and linkage of the middle single scissor mechanism 001. The central sliding module bottom plate 0034 can contact with the sliding module limit 011 after the double scissor unit unfolding process is completed to realize the limit of the mechanism. The above components all contain notches, which can prevent the central sliding module 003 from interfering with the connecting plate thereon when moving along the sliding rod 002.

[0067] In this embodiment, refer to Fig.16 and Fig.17 The short side sliding module group 004 includes a side sliding module sliding body 0041, a short side sliding module group adapter plate 0042, a side sliding module upper single hinge 0043, and a side sliding module bottom plate 0044. Each short side sliding module group 004 includes two side sliding module sliding bodies 0041 at an angle of 60°, which can maintain good coaxiality with the sliding rods 002 on two adjacent double scissor units. There is an opening on the short side sliding module group adapter plate 0042 to allow the push rod 006 to pass through. When the double scissor unit driving spring 010 pushes the short side sliding module group adapter plate 0042 to move, the two single scissor mechanisms 001 connected to the short side sliding module group 004 can achieve synchronous movement. The upper single hinge 0043 of the side sliding module The rotation axis of 043 forms an angle of 60°, and can be connected to the single scissor mechanism 001 of the adjacent double scissor units respectively. The side sliding module bottom plate 0044 contacts the sliding module limit 011 at the end of the expansion to achieve the limit of the mechanism. At the same time, the above-mentioned components all contain notches, which can prevent the short side sliding module group 004 from interfering with the connecting plate thereon when moving along the sliding rod 002. The difference between the long side sliding module group 005 and the short side sliding module group 004 is that the corresponding components of the long side sliding module group 005 form an angle of 120°, and the long side sliding module group adapter plate 0052 contained in the long side sliding module group 005 is different from the short side sliding module group adapter plate 0042 in terms of length, notch angle and other arrangements, but the corresponding functions of the two are the same;

[0068] In this embodiment, refer to Fig.18 and Fig.19The short side sliding module group 004 and the long side sliding module group 005 have the same corresponding functions, and their main structural differences lie in the length and the angle of the notch. There is an opening on each side for the sliding rod 002 to pass through, and each half has six inner and outer circle screw holes for transfer. The inner circle screw holes are used to connect with the sliding body 0041 of the side sliding module, and the three holes are arranged at an equal angle of 120°. The outer circle screw holes are used to connect with the single hinge 0043 on the upper part of the side sliding module, and the three holes are also arranged at an equal angle of 120°. There are openings in the middle of both for the push rod 006 to pass through, and there are protrusions on the outside of the openings to limit the lateral displacement of the double scissors unit driving spring 010.

[0069] Embodiment 5: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0070] In this embodiment, refer to Fig. 20 and Fig.21 The first type of connection unit 11 includes a first type of connection unit side rod 101, an upper rotation module 102 of the connection unit scissor-fork mechanism, a lower sliding module 103 of the connection unit scissor-fork mechanism, a connection unit scissor-fork mechanism sliding limit 104, a first type of connection unit connection 105, a connection unit upper and lower rod connection 106, a connection unit upper rod 107, a connection unit lower rod 108, a connection unit locking claw 109, a connection unit driving spring 110, a connection unit driving spring limit 111, an upper scissor-fork rod 112 of the connection unit scissor-fork mechanism, a lower scissor-fork rod 113 of the connection unit scissor-fork mechanism, a connection unit scissor-fork mechanism scissor-fork rod adapter 114, and a connection unit scissor-fork mechanism center hinge 115. The connection unit is approximately an isosceles trapezoid in the unfolded state and approximately an elongated rectangle in the folded state. The plane where the first type of connection unit 11 is located and the module units connected to it do not rotate relative to each other during the unfolding process. The first type The connection units 11 are all fixedly connected to the module units. The scissor mechanism in the middle of the connection unit is used to ensure that the entire unit has a single degree of freedom during the unfolding process, and its configuration is similar to the single scissor mechanism 001 in the double scissor unit. The upper scissor rods 112 of the two connection unit scissor mechanisms at the upper ends are fixedly connected to the connection unit scissor mechanism scissor rod adapter 114, and through their hinges, they form a rotation pair with the upper rotating module 102 of the connection unit scissor mechanism fixed on the first type of connection unit side rod 101, so as to realize the rotation of the scissor mechanism in the middle of the connection unit around the fixed axis. The lower scissor rods 113 of the two connection unit scissor mechanisms at the lower ends are fixedly connected to the connection unit scissor mechanism scissor rod adapter 114, and through their hinges, they form a rotation pair with the lower sliding module 103 of the connection unit scissor mechanism that can slide on the first type of connection unit side rod 101, thereby realizing the composite movement of the scissor mechanism in the middle of the connection unit rotating around the axis and sliding.

[0071] In this embodiment, there is a scissor mechanism in the middle of the connection unit, which is used to ensure that the entire connection unit expansion process is a single-degree-of-freedom expansion. The entire expansion process of the connection unit is driven by the connection unit driving spring 110 to drive the lower sliding module 103 of the connection unit scissor mechanism. At the same time, the upper and lower parts of the connection unit are both provided with connection unit locking claws 109 for automatically locking after expansion into place.

[0072] In this embodiment, the scissor mechanism in the middle of the connection unit is pushed to unfold by the connection unit driving spring 110 with one end pressing on the connection unit driving spring limiter 111, and the unfolding limit is achieved by the contact between the lower sliding module 103 of the connection unit scissor mechanism and the connection unit scissor mechanism sliding limiter 104, and the connection unit driving spring limiter 111 and the connection unit scissor mechanism sliding limiter 104 are both fixedly connected to the first type of connection unit side rod 101;

[0073] In this embodiment, there are two ways of connecting the first-type connection unit 11 and the module unit: one is that the first-type connection unit 11 connected to the outer side of the double scissors unit is directly connected through the corresponding hole position of the module corner connector 007 in the module unit, and the other is that the first-type connection unit 11 connected to the middle of the double scissors unit is fixedly connected through the first-type connection unit connection 105, wherein the connection hole on the outer side of the first-type connection unit connection 105 is used to connect with the sliding rod 002, and the inner structure is similar to the side scissors mechanism connector 009, and can be connected to the connection unit upper and lower rod connectors 106 through hinges while connecting the first-type connection unit side rod 101;

[0074] In this embodiment, after the first type of connection unit 11 is deployed in place, it is locked simultaneously by the upper and lower connection unit locking claws 109. The connection unit locking claws 109 located at the upper and lower parts are respectively connected to the connection unit upper rod 107 and the connection unit lower rod 108. Both of these rods are hollow square tube structures and can be staggered front and back when the first type of connection unit 11 is in the folded state.

[0075] In this embodiment, refer to Fig. 22 - Fig.24The main difference between the second-type connection unit and the first-type connection unit 11 is that the side rod 201 of the second-type connection unit is a rod divided into multiple sections, and multiple second-type connection unit rotating male hinges 202 are nested between them, so that the plane where it is located can produce an angle change with the module unit connected to it during the antenna deployment process. The second-type connection unit rotating male hinge 202 can cooperate with the multiple-section second-type connection unit rotating female hinges 204 nested on the second-type connection unit transfer side rod 203, so that the connection unit rotates around the rotating axis of the rotating pair formed by the two. There is only one way to connect the second-type connection unit to the module unit, that is, through the second-type connection unit connection 205 fixedly connected on the second-type connection unit transfer side rod 203 and connected to the sliding rod 002 of the corresponding double scissors-fork unit.

[0076] Embodiment 6: It has the implementation content of the above embodiment, wherein the specific implementation of the above embodiment can refer to the above description, and the embodiment here will not be repeated in detail; and in the embodiment of the present application, it is different from the above embodiment in that:

[0077] In this embodiment, refer to Fig.25 The connection unit locking claw 109 includes a connection unit locking claw male hinge 1091, a connection unit locking claw female hinge 1092, a connection unit locking claw locking rod 1093, a locking rod rotating shaft 1094, a locking rod actuating torsion spring 1095, a connection unit locking claw driving coil spring 1096, a connection unit locking claw rotating shaft 1097, and a connection unit locking claw fixing nut 1098. The thickness direction dimension of the antenna remains unchanged during the unfolding process. When the module unit is folded, it is a slender hexagonal prism. When the entire antenna is folded, it is a low columnar structure formed by connecting multiple groups of slender hexagonal prisms in parallel through the folded connection unit;

[0078] In this embodiment, the connection unit locking claw male hinge 1091 is locked by the connection unit locking claw locking rod 1093 connected to the connection unit locking claw female hinge 1092. In the folding stage, the connection unit locking claw locking rod 1093 is located on the cylindrical raised track in the middle of the connection unit locking claw male hinge 1091. After being deployed, the connection unit locking claw locking rod 1093 can rotate around the locking rod rotating shaft 1094 under the torque of the locking rod actuating torsion spring 1095, and can be stuck in the cylindrical raised track. The depression at the end realizes locking. In the initial stage of deployment, the connecting unit locking claw driving coil spring 1096 can provide basic torque for the claw, so that it can overcome the possible jamming in the initial position and deploy smoothly. The connecting unit locking claw rotation shaft 1097 is located in the corresponding hole position of the connecting unit locking claw male hinge 1091 and the connecting unit locking claw female hinge 1092 to realize the relative rotation of the two. The two ends of the connecting unit locking claw have threads, which can cooperate with the connecting unit locking claw fixing nut 1098 to realize the axial fixation of the two coil springs and the male and female hinges.

[0079] In this embodiment, refer to Fig.26 - Fig.28 One end of the connecting unit upper and lower rod connecting piece 106 is two parallel square holes. By connecting the connecting unit upper rod 107 or the connecting unit lower rod 108 to one of them, the two connecting unit upper rods 107 or the connecting unit lower rods 108 connected to the same connecting unit locking claw 109 can be staggered. One end of the connecting unit locking claw male hinge 1091 is a square hole connected to the connecting unit upper rod 107 or the connecting unit lower rod 108, and the other end of the shaft hole has a cylindrical protrusion track on the outside. In the initial stage of deployment, the connecting unit locking claw locking rod 1093 is located on it, and moves tangentially along this track during the deployment process. At the end of the deployment, it falls into the notch at the end to achieve locking. One end of the connecting unit locking claw female hinge 1092 is a square hole staggered front and back with the connecting unit locking claw male hinge 1091, and the other end includes an axis hole for placing the connecting unit locking claw rotation axis 1097 and the locking rod rotation axis 1094.

[0080] The use method and working principle of this device: a multi-ring peripheral parallel networking antenna based on double scissor units, including 19 module units with exactly the same configuration and size and different connection units connected between the module units, with an unfolded diameter of not less than 50m and a storage cross-sectional diameter of about 5.1m. The module unit is a hexagonal prism structure based on the double scissor unit. Different module units are connected to each other through different types of connection units. The drive of the double scissor unit is located at the six corners of each module. According to the working mode of the connection unit, the connection unit can be divided into two categories with a total of five types of connection units. The same type of connection units have the same configuration but different sizes.

[0081] The aperture expansion and profile formation of the antenna are divided into two mutually decoupled stages through the module unit mechanism and the connection unit mechanism. In the first stage of the expansion, only the module units are coplanarly expanded to achieve the expansion of the antenna aperture. In the second stage of the expansion, only the connection units are spatially expanded, so that the vertices of each module unit are located on the same sphere. The connection units are mutually spread out so that the module units are connected in parallel and form a specific angle, which serves to make the antenna expand into a desired geometric shape. The technical solution of the present invention can provide reference value for the design of ultra-large aperture parabolic load antennas, and is conducive to the decoupling of the expansion process and the expansion of simple parabolic antenna design, so that the antenna can adapt to higher operating frequencies and have a wider frequency band, and then enhance the anti-reconnaissance ability of the antenna through frequency hopping communication technology and spread spectrum communication technology.

[0082] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-ring peripheral parallel networking antenna based on double scissor units, characterized by: It is composed of nineteen hexagonal prism module units with exactly the same configuration and size. Each of the hexagonal prism module units is regarded as a circular peripheral antenna, and the entire antenna is formed by connecting the module units in parallel. The module units are connected by connecting units. Each of the hexagonal prism module units is composed of six groups of double scissor units with exactly the same configuration and size. The drive of the double scissor unit is located at the six corners of each module. According to the working mode, the connecting units can be divided into two categories with a total of five types of connecting units. The connecting units of the same type have the same configuration but different sizes. The deployment of the multi-annular peripheral parallel networking antenna of the double scissor unit is divided into two mutually decoupled stages. In the first stage, only each module unit performs the deployment movement, and the angle of each double scissor unit in the same module unit remains unchanged, and the synchronous deployment movement is performed. The thickness direction dimension remains unchanged during the deployment process. The module unit is a slender hexagonal prism when folded, and the entire antenna is a low columnar structure formed by connecting units in parallel with multiple groups of slender hexagonal prisms when folded. The movement in the first stage is a plane deployment, and the vertices in the upper and lower surfaces of each module unit always remain coplanar, which serves to expand the antenna aperture. In the second stage, only each connection unit performs the deployment movement. The deployment movement in the second stage is a spatial movement. The connection units are mutually spread out so that each module unit is connected in parallel and forms a specific angle, which serves to make the antenna open into a desired geometric shape; The module units can be divided into two types according to the generation method and geometric position: topology type one module (01) and topology type two module (02). The six topology type two modules (02) close to the central module are generated by rotating the central module. The six topology type two modules (02) far from the central module are generated by the topology type two modules (02) close to the central module in the same way. The outer topology type one module (01) is generated by reversely generating the outer topology type two modules (02). The connection units are divided into two types according to their working methods. The first type only includes one type of first type connection unit (11). When unfolded, the angle between the plane where the connection unit is located and the adjacent module unit remains unchanged. The second type includes second type connection units, which are divided into four types: second type connection unit type one (21), second type connection unit type two (22), second type connection unit type three (23), and second type connection unit type four (24). The connection units are not only unfolded within the plane where the connection unit is located, but also relatively rotated between the plane where the connection unit is located and the module unit connected to the connection unit. The second type connection units include second type connection unit side rods (201), second type connection unit transfer side rods (203), second type connection unit rotation female hinges (204), and second type connection unit connections (205). The second type connection unit side rods (201) are connected with multiple second type connection unit rotation male hinges (202), which can realize rotation around their own symmetry axes. When unfolded, the angle between the plane where the connection unit is located and the adjacent module unit changes.

2. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 1, characterized in that: The first type of connection unit (11) comprises a first type of connection unit side rod (101), an upper rotation module (102) of a connection unit scissor-fork mechanism, a lower sliding module (103) of a connection unit scissor-fork mechanism, a sliding limiter (104) of a connection unit scissor-fork mechanism, a first type of connection unit connection (105), a connection unit upper and lower rod connection piece (106), a connection unit upper rod (107), a connection unit lower rod (108), a connection unit locking claw (109), a connection unit drive spring (110), a connection unit drive spring limiter (111), and a connection unit The upper scissor rod (112) of the scissor mechanism, the lower scissor rod (113) of the connecting unit scissor mechanism, the scissor rod adapter (114) of the connecting unit scissor mechanism, and the central hinge (115) of the connecting unit scissor mechanism, the connecting unit is an isosceles trapezoid in the unfolded state and an elongated rectangle in the folded state, the plane where the first type of connecting unit (11) is located and the module unit connected thereto do not produce relative rotation during the unfolding process, the first type of connecting unit (11) is fixedly connected to the module unit, and the scissor mechanism in the middle of the connecting unit is used to ensure that the entire unit has a single degree of freedom during the unfolding process.

3. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 2, characterized in that: The connecting unit has a scissor mechanism in the middle, which is used to ensure that the entire connecting unit unfolding process is a single-degree-of-freedom unfolding process. The entire unfolding process of the connecting unit is carried out by the connecting unit driving spring (110) driving the lower sliding module (103) of the connecting unit scissor mechanism. At the same time, the upper and lower parts of the connecting unit are both provided with connecting unit locking claws (109) for automatically locking after unfolding into place.

4. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 1, characterized in that: Each module unit of the antenna is provided with a cable net matched with six double scissor units at its edge to form a rigid-flexible coupling structure. The cable net structure is composed of a front cable net (31), a tension array (32) and a back cable net (33). The antenna relies on the front cable net (31) attached to each module unit to form a working surface. The front cable net (31) of the module units located at different positions has slightly different profiles. A plurality of module units are connected in parallel to form a parabolic working surface. Each point on the upper surface of each module unit is located on a spherical surface fitted by the working surface. The front cable net (31) of each module unit and the folding and unfolding mechanism are connected by a certain compensation connection to compensate for the error.

5. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 2, characterized in that: The connecting unit locking claw (109) comprises a connecting unit locking claw male hinge (1091), a connecting unit locking claw female hinge (1092), a connecting unit locking claw locking rod (1093), a locking rod rotating shaft (1094), a locking rod actuating torsion spring (1095), a connecting unit locking claw driving coil spring (1096), a connecting unit locking claw rotating shaft (1097), and a connecting unit locking claw fixing nut (1098).

6. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 1, characterized in that: The double scissors-fork unit comprises a sliding rod (002), a central sliding module (003), a short side sliding module group (004), a long side sliding module group (005), a pushing rod (006), a module corner connector (007), a central scissors-fork mechanism connector (008), a side scissors-fork mechanism connector (009), a double scissors-fork unit driving spring (010) and a sliding module limiter (011). A single scissors-fork mechanism (001) is respectively arranged on two different parallel axes on the sliding rod (002) to achieve staggered placement of the front and rear central scissors-fork mechanisms on the same double scissors-fork unit. A part of the short side sliding module group (004) and the long side sliding module group (005) are respectively arranged on two axes on the two sliding rods (002) at the edge of the double scissors-fork unit, and the other part is connected to the sliding rod (002) at the edge of the adjacent double scissors-fork unit to achieve synchronous expansion of the same module unit.

7. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 6, characterized in that: The single scissor-fork mechanism (001) comprises a single scissor-fork mechanism hinge (0011), a single scissor-fork mechanism scissor rod (0012), and a single scissor-fork mechanism scissor rod edge connector (0013); the single scissor-fork mechanism hinge (0011) can enable four single scissor-fork mechanism scissor rods (0012) in the single scissor-fork mechanism (001) to rotate around a coaxial axis.

8. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 7, characterized in that: The single scissor-fork mechanism hinge (0011) comprises a single scissor-fork mechanism half hinge (00111), a single scissor-fork mechanism rotation axis (00112), a single scissor-fork mechanism bearing (00113), and a bearing retaining ring (00114). The single scissor-fork mechanism half hinge (00111) enables the connected single scissor-fork mechanism scissor rod (0012) to rotate around the single scissor-fork mechanism rotation axis (00112). The single scissor-fork mechanism rotation axis (00112) as a rotating body can cooperate with the bearing retaining ring (00114) to realize the placement of the single scissor-fork mechanism bearing (00113).

9. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 6, characterized in that: The central sliding module (003) comprises a central sliding module sliding body (0031), a central sliding module adapter plate (0032), a central sliding module upper double hinge (0033), and a central sliding module bottom plate (0034). The central sliding module sliding body (0031) can enable the central sliding module (003) to maintain good coaxiality while sliding on the sliding rod (002).

10. The multi-ring peripheral parallel networking antenna based on double scissor units according to claim 6, characterized in that: The short side sliding module group (004) comprises a side sliding module sliding body (0041), a short side sliding module group adapter plate (0042), a side sliding module upper single hinge (0043), and a side sliding module bottom plate (0044); each of the short side sliding module groups (004) comprises two side sliding module sliding bodies (0041) at an angle of 60°, which can respectively maintain good coaxiality with the sliding rods (002) on two adjacent double scissor units; the long side sliding module group adapter plate (0052) included in the long side sliding module group (005) is different from the short side sliding module group adapter plate (0042) in terms of length and notch angle arrangement.

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