A bilateral multi-stage synchronous folding mechanism for carrying an antenna array

Abstract

A bilateral multi-stage synchronous folding mechanism for carrying an antenna array, belonging to the technical field of radar antenna deployment and folding. The present invention aims to solve the drawbacks that the existing folding and unfolding mechanism of vehicle-mounted radars is affected by the folding and unfolding ratio characteristics, making it difficult to achieve the design of large-aperture antennas and unable to be applied to large vehicle-mounted radar antennas. The synchronous folding mechanism described in this application includes a connecting frame and two folding units. Both folding units are located on the same side of the connecting frame, and the two folding units are arranged parallel and opposite to each other along the center line in the length direction of the connecting frame. One end of each folding unit is hinged to the connecting frame. The antenna array is installed on the synchronous folding mechanism, and the extended track formed by the unfolding of the two folding units is used to carry and support the antenna array in the extended state. This application is mainly used as a load-bearing component during the folding and unfolding process of the antenna array.

Description

Technical Field

[0001] The invention belongs to the technical field of radar antenna unfolding and folding, and particularly relates to a bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface. Background Art

[0002] With the traction of the development requirements of weaponry such as anti-stealth aircraft and anti-ballistic missile defense, in order for a radar to obtain a relatively long detection range, it is necessary to increase the transmission power and enlarge the aperture of the antenna array surface. Moreover, the requirements for its mobility, safety, efficiency, long service life and economy are continuously increasing, which puts forward higher requirements for the positioning, clamping and installation technologies during the erection process of the radar antenna. It is required that the antenna has reliable quality, low assembly cost, higher precision and efficiency, and a more automatic unfolding and erection process.

[0003] At present, the large-scale vehicle-mounted radar antennas in China still use the traditional manual erection method. This method uses lifting equipment for on-site hoisting, with low erection efficiency, poor installation accuracy and difficult to ensure mobility, and it can no longer meet the requirements of modern radars for high mobility, high precision and high combat effectiveness. Moreover, if another method of folding and unfolding in blocks is adopted, not only the structure of the radar antenna itself is not compressed, but also restricted by the weight of the antenna array surface and the height of the antenna unit, the folding and unfolding ratio is small, the layout of the flipping and folding mechanism occupies a large space, it is difficult to realize the design of a large-aperture antenna, and it cannot be applied to large-scale vehicle-mounted radar antennas, and can only be limited to medium and small-sized vehicle-mounted radar antennas.

[0004] The strike time of modern warfare is continuously shortened, and the requirement for the high-altitude erection speed of radars has been reduced to within 10 minutes. In order to improve the mobility and deployment efficiency of ground antennas, the design of vehicle-mounted radar antennas needs to reduce the transportation units as much as possible, reduce the telescopic folding, lifting, splicing and other actions of the antenna array surface, avoid manual intervention, and realize rapid automatic erection and retraction. Large-scale and highly mobile radar systems are an important development trend of current ground military radars, and the existing radar configurations and erection methods are difficult to meet the requirements of high-mobility transportation and large-sized arrays at the same time.

[0005] Therefore, developing a radar antenna with the characteristics of light weight, large aperture and high folding and unfolding ratio, and greatly improving the mobility of vehicle-mounted radars is an urgent problem to be solved for large-scale vehicle-mounted radar products. Summary of the Invention

[0006] In order to solve the drawbacks that the existing folding and unfolding mechanism of vehicle-mounted radars is affected by the folding and unfolding ratio characteristics, it is difficult to realize the design of large-aperture antennas and cannot be applied to large-scale vehicle-mounted radar antennas, the invention further provides a bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface;

[0007] A bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface. The synchronous folding mechanism includes a connecting frame and two folding units. Both folding units are located on the same side of the connecting frame, and the two folding units are arranged parallel and opposite to each other along the center line in the length direction of the connecting frame. One end of each folding unit is hinged to the connecting frame, and the antenna array surface is installed on the synchronous folding mechanism. The extended track formed by the unfolding of the connecting frame and the two folding units provides load-bearing support for the antenna array surface in the extended state.

[0008] Further, two antenna array bearing plates are symmetrically arranged along the center line in the length direction of the top of the connecting frame, and each antenna array bearing plate is integrally formed with the connecting frame. Each antenna array bearing plate corresponds to one folding unit, and the length direction of each antenna array bearing plate is the same as the extension direction of the antenna array surface. The fixed track formed by the two antenna array bearing plates provides load-bearing support for the antenna array surface in the folded state.

[0009] Further, the folding unit includes a first electric push rod, a basic arm, an intermediate arm, a terminal arm, and a folding drive assembly. One end of the basic arm is hinged to the connecting frame. The first electric push rod is arranged below the outside of the basic arm. The cylinder body of the first electric push rod is hinged to one end of the connecting frame, and the push rod of the first electric push rod is hinged to the bottom of the basic arm. The basic arm is driven by the first electric push rod and can perform folding and unfolding actions relative to the connecting frame. The other end of the basic arm is hinged to one end of the intermediate arm, and the other end of the intermediate arm is hinged to one end of the terminal arm. The folding drive assembly is located below the basic arm, the intermediate arm, and the terminal arm. One end of the folding drive assembly is hinged to the bottom of the basic arm, and the other end of the folding drive assembly is connected to the intermediate arm and the terminal arm. The intermediate arm is driven by the folding drive assembly and can perform folding and unfolding actions relative to the basic arm. The terminal arm is driven by the folding drive assembly and can perform folding and unfolding actions relative to the intermediate arm, and the folding and unfolding actions of the intermediate arm and the terminal arm are synchronously driven by the folding drive assembly.

[0010] Further, a first hinge seat is provided at the corresponding position of the side of the connecting frame and each folding unit, and the first hinge seat is detachably connected to the connecting frame by bolts. A first hinge ear is provided at the bottom of one end of each basic arm close to the connecting frame, and the first hinge ear is integrally formed with the basic arm. The basic arm is hinged to the connecting frame through the cooperation of the first hinge ear, the first hinge seat, and the hinge shaft.

[0011] Further, a second hinge seat is provided at each end of the connecting frame, and each second hinge seat is integrally formed with the connecting frame. A second hinge ear is provided at the tail end of the cylinder body of the first electric push rod, and the second hinge ear is integrally formed with the cylinder body of the first electric push rod. The first electric push rod is hinged to the connecting frame through the cooperation of the second hinge ear, the second hinge seat, and the hinge shaft.

[0012] Furthermore, the top surface of the antenna array carrier plate is coplanar with the top surfaces of the basic arm, the intermediate arm, and the end arm. A groove is machined at the top of the basic arm for cooperation with the antenna array carrier plate.

[0013] Furthermore, a third hinge seat is provided on the outer side of the end of the basic arm away from the connecting frame, and the third hinge seat is integrally formed with the basic arm. A third hinge ear is provided on the outer side of the end of the intermediate arm close to the basic arm, and the third hinge ear is integrally formed with the intermediate arm. The intermediate arm is hinged to the basic arm through the cooperation of the third hinge ear, the third hinge seat, and the first pin shaft.

[0014] Furthermore, a fourth hinge seat is provided on the inner side of the end of the intermediate arm away from the basic arm, and the fourth hinge seat is integrally formed with the intermediate arm. A fourth hinge ear is provided on the inner side of the end of the end arm close to the intermediate arm, and the fourth hinge ear is integrally formed with the end arm. The end arm is hinged to the intermediate arm through the cooperation of the fourth hinge ear, the fourth hinge seat, and the second pin shaft.

[0015] Furthermore, the folding drive assembly includes a second electric push rod, a link assembly, and a chain drive assembly. The link assembly includes an arc link and a straight link. There are three hinge points on the arc link. The first hinge point of the arc link is hinged to the third hinge seat through a hinge shaft. The second hinge point on the arc link is hinged to one end of the straight link through a hinge shaft. The other end of the straight link is hinged to the intermediate arm through a hinge shaft. The second electric push rod is arranged below the basic arm, and the cylinder body of the second electric push rod is hinged to the basic arm through a hinge shaft. The push rod of the second electric push rod is hinged to the third hinge point on the arc link through a hinge shaft. One end of the chain drive assembly is connected to the first pin shaft, and the other end of the chain drive assembly is connected to the second pin shaft.

[0016] Furthermore, the chain drive assembly includes a first sprocket, a spring chain, and a second sprocket. The first sprocket is sleeved on the outer circular surface of the first pin shaft. The second sprocket is sleeved on the outer circular surface of the second pin shaft. The spring chain is sleeved on the first sprocket and the second sprocket, and the first sprocket is drivingly connected to the second sprocket through the second sprocket.

[0017] Advantages of the present application over the prior art:

[0018] A bilateral multi-stage synchronous folding mechanism for carrying an antenna array proposed in the present application can achieve the functional integration of the folding and unfolding technology of the radar antenna array compared with the traditional radar folding structure. By setting multi-stage sequential folding, two sub-mechanisms of the same mechanism are used to achieve different folding functions respectively. It can not only achieve the 180° synchronous folding function but also the 90° folding function. Functional integration can provide great design advantages for mechanism design, facilitating the layout of other components and lightweight design.

[0019] A bilateral multi-stage synchronous folding mechanism for carrying an antenna array proposed in this application can achieve a larger folding ratio compared to traditional radar folding structures. This application can realize large-angle unfolding and folding functions of 180° and 90°. When the antenna is unfolded, a large unfolding space can be achieved, ensuring the large-size requirements of the antenna array. When the antenna array is folded, a stacked state with a small space occupation ratio can be achieved, ensuring the high mobility of the radar antenna during transportation;

[0020] A bilateral multi-stage synchronous folding mechanism for carrying an antenna array proposed in this application ensures the compactness of the structure on the basis of realizing function integration and achieving a larger folding ratio. This application makes full use of the reasonable design of the structures of various components, which can minimize the occupied space after storage and ensure the safety and stability of the radar antenna during transportation. Brief Description of the Drawings

[0021] Figure 1 It is an unfolded schematic diagram of the bilateral multi-stage multi-angle synchronous folding mechanism described in this application;

[0022] Figure 2 It is a schematic diagram of the structure of the folding unit in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application;

[0023] Figure 3 It is a schematic diagram of the structure of the No. 1 electric push rod in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application;

[0024] Figure 4 It is a schematic diagram of the structure of the folding drive assembly in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application;

[0025] Figure 5 It is a schematic diagram of the shape after the folding unit in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application folds by 180° itself;

[0026] Figure 6 It is a schematic diagram of the shape after the whole folding unit in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application folds by 180° (viewing angle relative to the connecting frame);

[0027] Figure 7 It is a schematic diagram of the shape after the whole folding unit in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application folds by 90°;

[0028] Figure 8 It is a schematic diagram after two folding units in the bilateral multi-stage multi-angle synchronous folding mechanism described in this application are folded;

[0029] In the figure, there are connecting frame 1, first hinge seat 11, second hinge seat 12, antenna array bearing plate 13, folding unit 2, first electric push rod 21, second electric push rod 22, basic arm 23, connecting rod assembly 24, third hinge seat 25, first sprocket 26, third hinge ear 27, spring chain 28, intermediate arm 29, second sprocket 210, end arm 211, fourth hinge seat 212, fourth hinge ear 213, first hinge ear 214, and antenna array 3. Detailed implementation mode

[0030] Detailed implementation mode one: In combination with Figures 1 to 8 To illustrate this implementation mode, in this implementation mode, a bilateral multi-stage synchronous folding mechanism for carrying an antenna array is provided. The synchronous folding mechanism includes a connecting frame 1 and two folding units 2. The two folding units 2 are both located on the same side of the connecting frame 1, and the two folding units 2 are arranged parallel and opposite to each other along the center line in the length direction of the connecting frame 1. One end of each folding unit 2 is hinged to the connecting frame 1. The antenna array 3 is installed on the synchronous folding mechanism, and the extended track formed by the unfolding of the two folding units 2 provides bearing support for the antenna array 3 in the extended state.

[0031] The two folding units 2 in the bilateral multi-stage synchronous folding mechanism for carrying an antenna array provided in this implementation mode are symmetrically arranged on both sides and can both perform folding actions along the plane of the connecting frame 1. The antenna array 3 is composed of a slider and a folding array. Slide rails are provided at the top of the connecting frame 1 and the top of the folding unit 2. When the antenna array 3 is in the folded state, the slider drives the folding array to stack, and the antenna array 3 as a whole presents a contracted state and is located on the slide rail at the top of the connecting frame 1. When the antenna array 3 is in the unfolded state, the slider drives the folding array to extend, and the antenna array 3 as a whole is in the unfolded state and is located on the spliced slide rail at the top of the folding unit 2 and the connecting frame 1. During the folding and unfolding process of the antenna array 3, the folding unit 2 will perform corresponding stacking compression or unfolding actions, achieving the effect of reducing space during the stacking process and ensuring a large telescopic ratio of the radar antenna.

[0032] Detailed implementation mode two: In combination with Figures 1 to 8 To illustrate this implementation mode, the difference between this implementation mode and the first detailed implementation mode is that two antenna array bearing plates 13 are symmetrically provided along the center line in the length direction of the top of the connecting frame 1, and each antenna array bearing plate 13 is integrally formed with the connecting frame 1. Each antenna array bearing plate 13 is correspondingly arranged with one folding unit 2, and the length extension direction of each antenna array bearing plate 13 is the same as the extension direction of the antenna array 3. The fixed track formed by the two antenna array bearing plates 13 provides bearing support for the antenna array 3 in the folded state. Other compositions and connection methods are the same as those in the first detailed implementation mode.

[0033] In this embodiment, the top of the antenna array support plate 13 is used to lay a fixed track. The length of the antenna array support plate 13 is larger than the folded size of the antenna array 3 after it is fully compressed, which is conducive to stably supporting the folded antenna array 3.

[0034] Specific implementation method three: Combination Figures 1 to 8 The present embodiment is described. The present embodiment is different from the second embodiment in that the folding unit 2 includes a No. 1 electric push rod 21, a basic arm 23, an intermediate arm 29, a terminal arm 211 and a folding drive assembly. One end of the basic arm 23 is hinged to the connecting frame 1. The No. 1 electric push rod 21 is arranged below the outer side of the basic arm 23. The cylinder of the No. 1 electric push rod 21 is hinged to one end of the connecting frame 1. The push rod of the No. 1 electric push rod 21 is hinged to the bottom of the basic arm 23. The basic arm 23 is driven by the No. 1 electric push rod 21 to realize folding and unfolding actions within the plane of the connecting frame 1. The other end of the basic arm 23 is hinged to one end of the intermediate arm 29. The other end of the intermediate arm 29 is hinged to one end of the terminal arm 211, the folding drive assembly is located below the basic arm 23, the intermediate arm 29 and the terminal arm 211, one end of the folding drive assembly is hinged to the bottom of the basic arm 23, and the other end of the folding drive assembly is connected to the intermediate arm 29 and the terminal arm 211, the intermediate arm 29 is driven by the folding drive assembly, and can achieve folding and unfolding actions within the plane of the basic arm 23, the terminal arm 211 is driven by the folding drive assembly, and can achieve folding and unfolding actions within the plane of the intermediate arm 29, and the folding and unfolding actions of the intermediate arm 29 and the terminal arm 211 are synchronously driven by the folding drive assembly. Other components and connection methods are the same as those of the second specific embodiment.

[0035] In this embodiment, the folding unit 2 can perform a 90° folding and unfolding movement relative to the connecting frame 1, and can also perform a 180° folding and unfolding movement by itself. Through the multi-stage folding and unfolding movement, the folding unit 2 can be in a maximally retracted state to meet the requirements of a large telescopic ratio of the radar antenna. When the folding unit 2 performs a 90° folding and unfolding movement relative to the connecting frame 1, the No. 1 electric push rod 21 serves as the main driving component. When the folding unit 2 performs a 180° folding and unfolding movement by itself, the folding drive assembly serves as the main driving component. The No. 1 electric push rod 21 and the folding drive assembly are connected in series through three levels: the basic arm 23, the intermediate arm 29 and the end arm 211. This can not only ensure the maximization of the antenna array expansion space to meet the requirements of a large size of the antenna array, but also rely on the multi-stage folding scheme to achieve a large folding and unfolding ratio to meet the requirements of high-mobility transportation of the radar antenna.

[0036] Specific implementation method four: Combination Figures 1 to 8Regarding this embodiment, the difference from the third specific embodiment is that at the corresponding positions of the side of the connecting frame 1 and each folding unit 2, there is a first hinge seat 11, and the first hinge seat 11 is detachably connected to the connecting frame 1 by bolts. At the bottom of one end of each basic arm 23 close to the connecting frame 1, there is a first hinge ear 214, and the first hinge ear 214 is integrally formed with the basic arm 23. The basic arm 23 is hinged to the connecting frame 1 through the cooperation of the first hinge ear 214, the first hinge seat 11 and the hinge shaft. Other components and connection methods are the same as those in the third specific embodiment.

[0037] Specific embodiment five: In combination with Figures 1 to 8 Regarding this embodiment, the difference from the fourth specific embodiment is that at each end of the connecting frame 1, there is a second hinge seat 12, and each second hinge seat 12 is integrally formed with the connecting frame 1. At the tail end of the cylinder body of the first electric push rod 21, there is a second hinge ear, and the second hinge ear is integrally formed with the cylinder body of the first electric push rod 21. The first electric push rod 21 is hinged to the connecting frame 1 through the cooperation of the second hinge ear, the second hinge seat 12 and the hinge shaft. Other components and connection methods are the same as those in the fourth specific embodiment.

[0038] Combined with the fourth and fifth specific embodiments, the first electric push rod 21 is based on the connecting frame 1. On the connecting frame 1, there are a first hinge seat 11 and a second hinge seat 12, which are respectively used for hinged fixation of the first electric push rod 21 and the basic arm 23. In addition to the ear seat hole hinged to the connecting frame 1 at the head end of the basic arm 23, there are mounting holes on the arm body, so that the first electric push rod 21 and the basic arm 23 can be hinged through a pin shaft. Under the push of the first electric push rod 21, the basic arm can be folded by 90°.

[0039] Specific embodiment six: In combination with Figures 1 to 8 Regarding this embodiment, the difference from the fifth specific embodiment is that the top surface of the antenna array carrier plate 13 is coplanar with the top surfaces of the basic arm 23, the intermediate arm 29 and the end arm 211. A groove for cooperating with the antenna array carrier plate 13 is machined at the top of the basic arm 23. Other components and connection methods are the same as those in the fifth specific embodiment.

[0040] In this embodiment, it is to ensure that there will be no position interference between the basic arm 23 during unfolding and folding and the antenna array carrier plate 13, ensuring the smoothness of the folding and unfolding actions of the folding unit 2.

[0041] Specific embodiment seven: In combination with Figures 1 to 8Describing this embodiment, the difference between this embodiment and the sixth specific embodiment is that on the outer side of the end of the basic arm 23 away from the connecting frame 1, there is a third hinge seat 25, and the third hinge seat 25 is integrally formed with the basic arm 23. On the outer side of the end of the intermediate arm 29 close to the basic arm 23, there is a third hinge ear 27, and the third hinge ear 27 is integrally formed with the intermediate arm 29. The intermediate arm 29 is hinged to the basic arm 23 through the cooperation of the third hinge ear 27, the third hinge seat 25 and the first pin shaft. Other components and connection methods are the same as those in the sixth specific embodiment.

[0042] Specific embodiment eight: Combining Figures 1 to 8 Describing this embodiment, the difference between this embodiment and the seventh specific embodiment is that on the inner side of the end of the intermediate arm 29 away from the basic arm 23, there is a fourth hinge seat 212, and the fourth hinge seat 212 is integrally formed with the intermediate arm 29. On the inner side of the end of the terminal arm 211 close to the intermediate arm 29, there is a fourth hinge ear 213, and the fourth hinge ear 213 is integrally formed with the terminal arm 211. The terminal arm 211 is hinged to the intermediate arm 29 through the cooperation of the fourth hinge ear 213, the fourth hinge seat 212 and the second pin shaft. Other components and connection methods are the same as those in the seventh specific embodiment.

[0043] Specific embodiment nine: Combining Figures 1 to 8 Describing this embodiment, the difference between this embodiment and the eighth specific embodiment is that the folding drive assembly includes a second electric push rod 22, a connecting rod assembly 24 and a chain drive assembly. The connecting rod assembly 24 includes an arc-shaped connecting rod and a straight connecting rod. There are three hinge points on the arc-shaped connecting rod. The first hinge point of the arc-shaped connecting rod is hinged to the third hinge seat 25 through a hinge shaft. The second hinge point on the arc-shaped connecting rod is hinged to one end of the straight connecting rod through a hinge shaft. The other end of the straight connecting rod is hinged to the intermediate arm 29 through a hinge shaft. The second electric push rod 22 is arranged below the basic arm 23, and the cylinder body of the second electric push rod 22 is hinged to the basic arm 23 through a hinge shaft. The push rod of the second electric push rod 22 is hinged to the third hinge point on the arc-shaped connecting rod through a hinge shaft. One end of the chain drive assembly is connected to the first pin shaft, and the other end of the chain drive assembly is connected to the second pin shaft. Other components and connection methods are the same as those in the eighth specific embodiment.

[0044] Specific embodiment ten: Combining Figures 1 to 8 Describing this embodiment, the difference between this embodiment and the ninth specific embodiment is that the chain drive assembly includes a first sprocket 26, a spring chain 28 and a second sprocket 210. The first sprocket 26 is sleeved on the outer circular surface of the first pin shaft. The second sprocket 210 is sleeved on the outer circular surface of the second pin shaft. The spring chain 28 is sleeved on the first sprocket 26 and the second sprocket 210, and the first sprocket 26 is drivingly connected to the second sprocket 210 through the spring chain 28. Other components and connection methods are the same as those in the ninth specific embodiment.

[0045] As described in Embodiments 7 to 10, the folding drive assembly is based on the basic arm 23. An installation hole is provided on the first-end arm body of the basic arm 23 for hinging with the second electric push rod 22. A third hinge seat 25 is provided at the end for hinging with the arc-shaped connecting rod and the intermediate arm 29. The first sprocket 26 is sleeved on the first pin shaft where the basic arm 23 is hinged to the intermediate arm 29 and axially fixed with a round nut. The first sprocket 26 is installed on the first pin shaft and fixedly connected to the basic arm 23. The other two of the three hinge holes provided on the arc-shaped connecting rod are respectively hinged to the second electric push rod 22 and the straight connecting rod through a hinge shaft. An installation hole is provided on the first-end arm body of the intermediate arm 29 for hinging with the straight connecting rod. A fourth hinge seat 212 is provided at the end for hinging with the end arm 211. The second sprocket 210 is installed on the second pin shaft and fixedly connected to the end arm 211. On the premise of ensuring the normal meshing of the chain and the sprocket during the working stroke, a spring is arranged in the middle of the spring chain 28 to play a tensioning role. In this way, the entire sub-mechanism is a complex linkage mechanism. Under the action of the second electric push rod 22, the intermediate arm 29 rotates around the hinge point with the basic arm 23. At the same time, the spring chain 28 is stressed to drive the second sprocket 210 and the end arm 211 to rotate around their hinge points. Since the diameters of the two sprockets are the same, the rotation angles are the same but the directions are different, and the rotation angle can reach 180°. In this way, the secondary synchronous 180° rotation of the intermediate arm 29 and the end arm 211 is realized, and finally they are stacked together with the basic arm.

[0046] The present invention has been disclosed above with preferred embodiments. However, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed structure and technical content within the scope of the technical solution of the present invention to make equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

[0047] Working principle

[0048] In the bilateral multi-stage multi-angle synchronous folding mechanism provided by the present application, the left and right folding units are completely the same. Therefore, only the working process and principle of a single folding mechanism will be introduced below. The working process of a single folding mechanism is a sequential working process, which is realized by two sub-mechanisms that can fold at different angles. Specifically, it is realized by controlling the working sequence of two-stage electric cylinders to achieve multi-stage folding of 180° and 90°.

[0049] After the antenna array is folded up, the multi-stage multi-angle folding mechanism that plays a bearing role also needs to be folded and retracted. This folding and retracting process is carried out in two steps, first 180° synchronous folding, and then 90° folding. The specific working process is as follows:

[0050] (1) 180° synchronous folding process

[0051] The 180° folding function is completed by the second electric push rod 22. As Figure 4 and Figure 5 shown, when folding and retracting is required, the push rod of the second electric push rod 22 is pushed out relative to the cylinder block. Its thrust acts on the corresponding hinge points of the intermediate arm 29 through the arc link and the straight link, generating a rotational torque of the intermediate arm 29 around the hinge point of the intermediate arm 29 and the basic arm 23, so that the intermediate arm 29 rotates around the axis where the hinge point with the basic arm 23 is located. Since the first sprocket 26 is fixedly connected to the basic arm 23 and the second sprocket 210 is fixedly connected to the end arm 211, when the intermediate arm 29 rotates relative to the hinge point of the basic arm 23, according to the principle of relative motion, the intermediate arm 29 rotates counterclockwise around the hinge point relative to the first sprocket 26. Then, taking the intermediate arm 29 as the reference system, the first sprocket 26 rotates clockwise around the hinge point. According to the working principle of the sprocket, to meet the conditions for the chain to engage and disengage, the rotation directions of the two sprockets are the same. Then the rotation direction of the second sprocket 210 is also clockwise, and the diameters of the two sprockets are the same. Then the rotation angle of the intermediate arm 29 around the basic arm 23 is equal in magnitude and opposite in direction to the rotation angle of the end arm 211 around the intermediate arm 29, thus realizing the two-stage synchronous 180° folding effect.

[0052] (2) 90° folding process

[0053] The 90° folding function is completed by the first electric push rod 21. As Figure 6 and Figure 7 shown. After the 180° synchronous folding is completed, the end arm 211 and the intermediate arm 29 will overlap on the basic arm 23. At this time, the entire folding unit 2 needs to be retracted into the storage space under the connecting frame. When 90° folding and retracting is required, the first electric push rod 21 will be pushed out and act on the hinge point of the basic arm 23 and the push rod. The thrust will generate a rotational torque on the basic arm 23 around the hinge point of the basic arm 23 and the connecting frame 1, so that the basic arm 23 drives the intermediate arm 29 and the end arm 211 overlapping on it to perform 90° folding and retracting together, and finally the folding process of a single folding unit 2 is completed.

Claims

1. A bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface, characterized in that: The synchronous folding mechanism includes a connecting frame (1) and two folding units (2). The two folding units (2) are both located on the same side of the connecting frame (1), and the two folding units (2) are arranged parallel and opposite to each other along the center line of the length direction of the connecting frame (1). One end of each folding unit (2) is hinged to the connecting frame (1). The antenna array surface (3) is installed on the synchronous folding mechanism, and the extended track formed by the unfolding of the two folding units (2) supports the antenna array surface (3) in the extended state. The folding unit (2) includes a first electric push rod (21), a basic arm (23), an intermediate arm (29), a terminal arm (211) and a folding drive assembly. One end of the basic arm (23) is hinged to the connecting frame (1). The first electric push rod (21) is arranged below the outside of the basic arm (23). The cylinder body of the first electric push rod (21) is hinged to one end of the connecting frame (1), and the push rod of the first electric push rod (21) is hinged to the bottom of the basic arm (23). The basic arm (23) is driven by the first electric push rod (21) and can perform folding and unfolding actions relative to the connecting frame (1). The other end of the basic arm (23) is hinged to one end of the intermediate arm (29), and the other end of the intermediate arm (29) is hinged to one end of the terminal arm (211). The folding drive assembly is located below the basic arm (23), the intermediate arm (29) and the terminal arm (211). One end of the folding drive assembly is hinged to the bottom of the basic arm (23), and the other end of the folding drive assembly is connected to the intermediate arm (29) and the terminal arm (211). The intermediate arm (29) is driven by the folding drive assembly and can perform folding and unfolding actions relative to the basic arm (23). The terminal arm (211) is driven by the folding drive assembly and can perform folding and unfolding actions relative to the intermediate arm (29), and the folding and unfolding actions of the intermediate arm (29) and the terminal arm (211) are synchronously driven by the folding drive assembly.

2. The bilateral multi-stage synchronous folding mechanism for carrying an antenna array according to claim 1, characterized in that: On the top of the connecting frame (1), two antenna array surface bearing plates (13) are symmetrically arranged along the center line of the length direction of the connecting frame (1), and each antenna array surface bearing plate (13) is integrally formed with the connecting frame (1). Each antenna array surface bearing plate (13) corresponds to a folding unit (2), and the length direction of each antenna array surface bearing plate (13) is the same as the extension direction of the antenna array surface (3). The fixed track formed by the two antenna array surface bearing plates (13) supports the antenna array surface (3) in the folded state.

3. The bilateral multi-stage synchronous folding mechanism for carrying an antenna array according to claim 2, characterized in that: At the corresponding position of the side part of the connecting frame (1) and each folding unit (2), a first hinge seat (11) is provided, and the first hinge seat (11) is detachably connected to the connecting frame (1) by bolts. At the bottom of one end of each basic arm (23) close to the connecting frame (1), a first hinge ear (214) is provided, and the first hinge ear (214) is integrally formed with the basic arm (23). The basic arm (23) is hinged to the connecting frame (1) through the cooperation of the first hinge ear (214), the first hinge seat (11) and the hinge shaft.

4. A bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface according to claim 3, characterized in that: Each end of the connecting frame (1) is provided with a second hinge seat (12), and each second hinge seat (12) is integrally formed with the connecting frame (1). The cylinder end of the first electric push rod (21) is provided with a second hinge ear, and the second hinge ear is integrally formed with the cylinder of the first electric push rod (21). The first electric push rod (21) is hinged to the connecting frame (1) through the cooperation of the second hinge ear, the second hinge seat (12) and the hinge shaft.

5. The bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface according to claim 4, characterized in that: The top surface of the antenna array bearing plate (13) is coplanar with the top surfaces of the basic arm (23), the intermediate arm (29) and the end arm (211). A groove for cooperating with the antenna array bearing plate (13) is machined at the top of the basic arm (23).

6. The bilateral multi-stage synchronous folding mechanism for carrying an antenna array according to claim 5, wherein: A third hinge seat (25) is provided on the outer side of the end of the basic arm (23) away from the connecting frame (1), and the third hinge seat (25) is integrally formed with the basic arm (23). A third hinge ear (27) is provided on the outer side of the end of the intermediate arm (29) close to the basic arm (23), and the third hinge ear (27) is integrally formed with the intermediate arm (29). The intermediate arm (29) is hinged to the basic arm (23) through the cooperation of the third hinge ear (27), the third hinge seat (25) and the first pin shaft.

7. A bilateral multi - stage synchronous folding mechanism for carrying an antenna array surface according to claim 6, characterized in that: A fourth hinge seat (212) is provided on the inner side of the end of the intermediate arm (29) away from the basic arm (23), and the fourth hinge seat (212) is integrally formed with the intermediate arm (29). A fourth hinge ear (213) is provided on the inner side of the end of the end arm (211) close to the intermediate arm (29), and the fourth hinge ear (213) is integrally formed with the end arm (211). The end arm (211) is hinged to the intermediate arm (29) through the cooperation of the fourth hinge ear (213), the fourth hinge seat (212) and the second pin shaft.

8. A bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface according to claim 7, characterized in that: The folding drive assembly includes a second electric push rod (22), a connecting rod assembly (24) and a chain drive assembly. The connecting rod assembly (24) includes an arc-shaped connecting rod and a straight connecting rod. There are three hinge points on the arc-shaped connecting rod. The first hinge point on the arc-shaped connecting rod is hinged to the third hinge seat (25) through a hinge shaft. The second hinge point on the arc-shaped connecting rod is hinged to one end of the straight connecting rod through a hinge shaft. The other end of the straight connecting rod is hinged to the intermediate arm (29) through a hinge shaft. The second electric push rod (22) is arranged below the basic arm (23), and the cylinder of the second electric push rod (22) is hinged to the basic arm (23) through a hinge shaft. The push rod of the second electric push rod (22) is hinged to the third hinge point on the arc-shaped connecting rod through a hinge shaft. One end of the chain drive assembly is connected to the first pin shaft, and the other end of the chain drive assembly is connected to the second pin shaft.

9. A bilateral multi-stage synchronous folding mechanism for carrying an antenna array surface according to claim 8, characterized in that: The chain drive assembly includes a first sprocket (26), a spring chain (28) and a second sprocket (210). The first sprocket (26) is sleeved on the outer circular surface of the first pin shaft. The second sprocket (210) is sleeved on the outer circular surface of the second pin shaft. The spring chain (28) is sleeved on the first sprocket (26) and the second sprocket (210), and the first sprocket (26) is drivingly connected to the second sprocket (210) through the spring chain (28).

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