Folding device for antenna oscillator layer

Abstract

The present invention relates to a folding device for an antenna element layer, which comprises two first truss beams; two second truss beams; a support cross beam, including support legs and a cross beam main body; a telescopic driving mechanism arranged on the cross beam main body; a first link mechanism, including two first links, two second links and two first linkage rods; one ends of the two first links are hinged to one end of the cross beam main body, the middle parts of the first links are respectively hinged to the middle parts of the second links, and the hinge points between the first links and the second links are also respectively hinged to the second truss beams, the other ends of the first links are respectively hinged to one ends of the first linkage rods, and the other ends of the first linkage rods are respectively hinged to the first truss beams; one ends of the two second links are hinged to the telescopic driving mechanism. For the above folding device of the antenna element layer, when the antenna element layer needs to be repaired or is not in use, the telescopic driving mechanism drives the first link mechanism to fold up, and the folding device of the antenna element layer folds, which is convenient for maintenance and storage.

Description

Technical Field

[0001] The present invention relates to the technical field of communication equipment, and in particular to a folding device for an antenna element layer. Background Art

[0002] At present, large shortwave antennas used in the field of long-distance communication are basically composed of multiple layers of oscillators supported by truss beams and supporting iron towers. Each layer of oscillators is arranged according to a certain pattern, with a wide frequency band and large available power, which can provide ultra-long-distance communication functions.

[0003] However, traditional antennas are large in size and have many accessories. Large scaffolding needs to be built during installation, and then dismantled after installation, which greatly increases the cost and takes a long time to install. Later maintenance is also inconvenient. The antenna is high, and installation and maintenance require professional high-altitude workers, which is also very dangerous. Summary of the invention

[0004] Based on this, it is necessary to provide a folding device for the antenna element layer to address the current traditional technical problems.

[0005] A folding device for an antenna element layer, comprising:

[0006] two first truss beams;

[0007] Two second truss beams, arranged between the two first truss beams;

[0008] A supporting crossbeam, comprising supporting legs and a crossbeam body, wherein the crossbeam body is arranged between two of the second truss beams;

[0009] A telescopic driving mechanism is arranged on the crossbeam body;

[0010] The first connecting rod mechanism includes two first connecting rods, two second connecting rods and two first linking rods; one end of the two first connecting rods is hinged to one end of the crossbeam body, the middle part of the first connecting rod is respectively hinged to the middle part of the second connecting rod, and the hinge points between the first connecting rod and the second connecting rod are also respectively hinged to the second truss beams, the other end of the first connecting rod is respectively hinged to one end of the first linking rod, and the other end of the first linking rod is respectively hinged to the first truss beam; one end of the two second connecting rods is hinged to the telescopic drive mechanism.

[0011] The folding device of the above antenna element layer. Before the antenna element layer needs to be used, the antenna element layer is installed on the first truss beam and the second truss beam, and the support legs are fixedly connected to the external support. When unfolding, the telescopic drive mechanism drives the first link mechanism to unfold, and then drives the two first truss beams and the two second truss beams away from the beam main body, that is, the folding device of the antenna element layer unfolds, so that the antenna element layer unfolds; there is no need to build a large scaffold, which effectively reduces costs and has high installation efficiency, effectively shortening the installation period. The operator does not need to install the antenna element layer at high altitude, which is beneficial to reducing potential safety hazards; and when the antenna element layer needs to be repaired or not used, the telescopic drive mechanism drives the first link mechanism to fold, and then drives the two first truss beams and the two second truss beams close to the beam main body, that is, the folding device of the antenna element layer folds, so that the antenna element layer folds, which is convenient for maintenance and storage.

[0012] In one embodiment, the first link mechanism further includes two second linkage rods. One end of each second linkage rod is respectively hinged to the other end of the second link, and the other end of each second linkage rod is respectively hinged to one end of the first linkage rod close to the first truss beam.

[0013] In one embodiment, when the folding device of the antenna element layer is in the fully folded state, the two first truss beams are parallel to each other, the first truss beam is parallel to the second truss beam, and the two second truss beams are parallel to each other.

[0014] In one embodiment, when the folding device of the antenna element layer is in the fully unfolded state, the included angle between the first truss beam and the adjacent second truss beam is 5° - 15°, and the included angle between the two second truss beams is 5° - 15°.

[0015] In one embodiment, the telescopic drive mechanism includes a driver arranged on the beam main body and a telescopic rod connected to the driver. One end of the telescopic rod away from the driver is hinged to one end of the two second links.

[0016] In one embodiment, a mounting seat is arranged on the beam main body, and one end of the driver away from the telescopic rod is hinged to the mounting seat.

[0017] In one embodiment, the lengths of the two first truss beams are equal, the lengths of the two second truss beams are equal, and the length of the first truss beam is equal to the length of the second truss beam.

[0018] In one embodiment, a second link mechanism is further included, and the second link mechanism is disposed at a relative interval with respect to the first link mechanism; the second link mechanism includes two third links and two third link rods, and one ends of the two third links are hinged to the other end of the crossbeam main body; the middle parts of the third links are respectively hinged to the second truss beams; one ends of the third link rods are respectively hinged to the other ends of the third links, and the other ends of the third link rods are respectively hinged to the first truss beams.

[0019] In one embodiment, the folding device of the antenna element layer has a first end and a second end disposed opposite to each other. The first link mechanism is disposed near the first end of the folding device of the antenna element layer, and the second link mechanism is disposed near the second end of the folding device of the antenna element layer.

[0020] In one embodiment, the support leg and the crossbeam main body are respectively disposed on opposite sides of the first link mechanism. Description of the Drawings

[0021] Figure 1 Structural schematic diagram of the folding device of the antenna element layer in the unfolded state according to a preferred embodiment of the present invention;

[0022] Figure 2 For Figure 1 Structural schematic diagram of the folding device of the antenna element layer in the folded state;

[0023] Figure 3 For Figure 1 Structural schematic diagram of the first link mechanism of the folding device of the antenna element layer;

[0024] Figure 4 For Figure 1 Structural schematic diagram of the second link mechanism of the folding device of the antenna element layer;

[0025] Figure 5 For Figure 1 Structural schematic diagram of the support crossbeam and the telescopic drive mechanism of the folding device of the antenna element layer.

[0026] The meanings of the reference numerals in the drawings are as follows:

[0027] First end 100, second end 200, first truss beam 10, second truss beam 20, support crossbeam 30, support leg 31, crossbeam main body 32, mounting hole 33, mounting seat 34, slide rail 35, slider 36, telescopic drive mechanism 40, driver 41, telescopic rod 42, first link mechanism 50, first link 51, second link 52, first link rod 53, second link rod 54, second link mechanism 60, third link 61, third link rod 62. Detailed Description of the Embodiment

[0028] For the convenience of understanding the present invention, the present invention will be described more comprehensively below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0030] It should be noted that when an element is referred to as "fixed to" another element at the other end, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element at the other end, it can be directly connected to the other element or there may be an intermediate element at the same time. On the contrary, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0031] Please refer to Figures 1 to 5 , a folding device for an antenna element layer of a preferred embodiment of the present invention, which is used to install the antenna element layer; the folding device of the antenna element layer has a first end 100 and a second end 200 which are oppositely arranged. The folding device of the antenna element layer includes two first truss beams 10, two second truss beams 20, a support cross beam 30, a telescopic driving mechanism 40 and a first link mechanism 50. The two first truss beams 10 are arranged relatively spaced apart. The two second truss beams 20 are arranged relatively spaced apart and are disposed between the two first truss beams 10. The two first truss beams 10 and the two second truss beams 20 are both used for connecting the antenna element layer. The support cross beam 30 includes a support leg 31 and a cross beam main body 32. The support leg 31 is used for fixedly connecting to an external bracket. The cross beam main body 32 is disposed on the support leg 31 and is disposed between the two second truss beams 20. The telescopic driving mechanism 40 is disposed on the cross beam main body 32. The first link mechanism 50 includes two first links 51, two second links 52 and two first linkage rods 53; one end of each of the two first links 51 is hinged to one end of the cross beam main body 32, the middle parts of the first links 51 are respectively hinged to the middle parts of the second links 52, and the hinge points between the first links 51 and the second links 52 are also respectively hinged to the second truss beams 20. The other ends of the first links 51 are respectively hinged to one end of the first linkage rods 53, and the other ends of the first linkage rods 53 are respectively hinged to the first truss beams 10; one end of each of the two second links 52 is hinged to the telescopic driving mechanism 40.

[0032] When the folding device of the antenna element layer needs to be folded when in the unfolded state, the telescopic drive mechanism 40 shortens in the first direction. Since one end of the second link 52 is hinged to the telescopic drive mechanism 40, when the telescopic drive mechanism 40 shortens in the first direction, the hinge point between the second link 52 and the telescopic drive mechanism 40 is also driven to move in the first direction, and then the middle part of the second link 52 is driven to move in the first direction and approach the crossbeam main body 32. Since the middle part of the first link 51 is respectively hinged to the middle part of the second link 52, and the hinge points between the first link 51 and the second link 52 are also respectively hinged to the second truss beam 20, when the middle part of the second link 52 moves in the first direction and approaches the crossbeam main body 32, the hinge points between the first link 51 and the second link 52 also move in the first direction and approach the crossbeam main body 32, that is, the second truss beam 20 is driven to move in the first direction and approach the crossbeam main body 32, and at the same time, the hinge point between the first link 51 and the first linkage rod 53 is also driven to move in the first direction and approach the crossbeam main body 32. Since the other end of the first linkage rod 53 is hinged to the first truss beam 10, when the hinge point between the first link 51 and the first linkage rod 53 moves in the first direction and approaches the crossbeam main body 32, the first truss beam 10 is driven to move in the first direction and approach the crossbeam main body 32. Similarly, when the folding device of the antenna element layer needs to be unfolded when in the folded state, the telescopic drive mechanism 400 extends in the second direction, and the second direction is opposite to the first direction, driving the hinge point between the second link 52 and the telescopic drive mechanism 40 to move in the second direction, and the middle part of the second link 52 moves in the second direction and moves away from the crossbeam main body 32, and then driving the hinge point between the first link 51 and the second link 52 to move in the second direction and move away from the crossbeam main body 32, that is, driving the second truss beam 20 to move in the second direction and move away from the crossbeam main body 32, and at the same time, driving the hinge point between the first link 51 and the first linkage rod 53 to move in the second direction and move away from the crossbeam main body 32, and then driving the first truss beam 10 to move in the second direction and move away from the crossbeam main body 32;

[0033] The folding device of the above antenna element layer. When the antenna element layer needs to be used, the antenna element layer is installed on the first truss beam 10 and the second truss beam 20. The support leg 31 is fixedly connected to an external support. The telescopic drive mechanism 40 drives the first link mechanism 50 to unfold, and then drives the two first truss beams 10 and the two second truss beams 20 away from the crossbeam main body 32, that is, the folding device of the antenna element layer unfolds, so that the antenna element layer unfolds; there is no need to build a large scaffold, which effectively reduces costs and has high installation efficiency, effectively shortening the installation period. The operator does not need to install the antenna element layer at a high altitude, which is beneficial to reducing potential safety hazards; and when the antenna element layer needs to be repaired or not used, the telescopic drive mechanism 40 drives the first link mechanism 50 to fold, and then drives the two first truss beams 10 and the two second truss beams 20 close to the crossbeam main body 32, that is, the folding device of the antenna element layer folds, so that the antenna element layer folds, which is convenient for maintenance and storage.

[0034] When the folding device of the antenna element layer is in the fully folded state, the two first truss beams 10 are parallel to each other, the first truss beam 10 is parallel to the second truss beam 20, and the two second truss beams 20 are parallel to each other. Specifically, the lengths of the two first truss beams 10 are equal, the lengths of the two second truss beams 20 are equal, and the length of the first truss beam 10 is equal to the length of the second truss beam 20. When the folding device of the antenna element layer is in the fully folded state, at the first end of the folding device of the antenna element layer, the first truss beam 10 extends out of the second truss beam 20; at the second end of the folding device of the antenna element layer, the second truss beam 20 extends out of the first truss beam 10.

[0035] Please refer to Figure 1 、 Figure 2 and Figure 3 In some embodiments, the first link mechanism 50 further includes two second linkage rods 54. One end of each second linkage rod 54 is respectively hinged to the other end of the second link 52, and the other end of each second linkage rod 54 is respectively hinged to one end of the first linkage rod 53 close to the first truss beam 10. By setting the second linkage rods 54, it is ensured that the folding device of the antenna element layer moves along a preset trajectory when unfolding and folding.

[0036] Please refer to Figure 1 、 Figure 2 and Figure 4 In some embodiments, the folding device of the antenna element layer further includes a second link mechanism 60. The second link mechanism 60 is arranged at a relative interval with the first link mechanism 50; further, the first link mechanism 50 is arranged close to the first end 100 of the folding device of the antenna element layer, the second link mechanism 60 is arranged close to the second end 200 of the folding device of the antenna element layer, and the first link mechanism 50 and the second link mechanism 60 are arranged on the same side of the folding device of the antenna element layer.

[0037] Specifically, the second link mechanism 60 includes two third links 61 and two third linkage rods 62. One end of the two third links 61 is hinged to the other end of the crossbeam main body 32; the middle parts of the third links 61 are respectively hinged to the second truss beam 20; one end of the third linkage rod 62 is respectively hinged to the other end of the third link 61, and the other end of the third linkage rod 62 is respectively hinged to the first truss beam 10. When the first truss beam 10 and the second truss beam 20 perform the unfolding and folding movements, the third links 61 and the third linkage rods 62 are driven to perform corresponding movements. Through the cooperation of the second link mechanism 60 and the first link mechanism 50, the first truss beam 10 and the second truss beam 20 are unfolded and folded. During the unfolding and folding process, the stress performance of the first truss beam 10 and the second truss beam 20 is effectively ensured, and the unfolding and folding operations of the first truss beam 10 and the second truss beam 20 are effectively ensured to proceed stably.

[0038] Further, the length of the third link 61 is greater than the lengths of the first link 51 and the second link 52, and the length of the third linkage rod 62 is greater than the lengths of the first linkage rod 53 and the second linkage rod 54. Thus, when the folding device of the antenna element layer is fully unfolded, the folding device of the antenna element layer is arranged in a fan shape, which is consistent with the shape after the antenna element layer is unfolded; further, when the folding device of the antenna element layer is in the fully unfolded state, the included angle between the first truss beam 10 and the adjacent second truss beam 20 is 5° - 15°, and the included angle between the two second truss beams 20 is 5° - 15°; furthermore, when the folding device of the antenna element layer is in the fully unfolded state, the included angle between the first truss beam 10 and the adjacent second truss beam 20 is 7.07°, and the included angle between the two second truss beams 20 is 7.07°.

[0039] Please refer to Figure 2 and Figure 5 , in some embodiments, the support leg 31 is provided with a mounting hole 33, and the mounting hole 33 is used for screw connection with an external bracket. The support leg 31 and the crossbeam main body 32 are respectively arranged on opposite sides of the folding device of the antenna element layer, which can effectively prevent the first link mechanism 50 and the second link mechanism 60 from rotating along the circumferential direction of the crossbeam main body 32, effectively ensure the stability of the movement of the first link mechanism 50 and the second link mechanism 60, and further ensure the stability of the movement of the first truss beam 10 and the second truss beam 20.

[0040] Specifically, the telescopic drive mechanism 40 includes a driver 41 arranged on the crossbeam main body 32 and a telescopic rod 42 connected to the driver 41. One end of the telescopic rod 42 far from the driver 41 is hinged to one end of the two second links 52. It should be noted that the driver 41 is an oil cylinder, a hydraulic cylinder or a pneumatic cylinder, and the telescopic rod 42 is a piston rod.

[0041] Further, a mounting seat 34 is arranged on the crossbeam main body 32, and one end of the driver 41 far from the telescopic rod 42 is hinged to the mounting seat 34.

[0042] In some embodiments, one end of the telescopic rod 42 away from the driver 41 is slidably disposed on the crossbeam main body 32, so that the telescopic rod 42 performs a stable telescopic movement along the crossbeam main body 32, effectively preventing the telescopic rod 42 from trembling or offsetting; further, a slide rail 35 is provided on the crossbeam main body 32. The slide rail 35 is a linear slide rail, and a slider 36 is slidably provided on the slide rail 35. The hinge point between the telescopic rod 42 and the two second link rods 52 is hinged to the slider 36. When the driver 41 drives the telescopic rod 42 to perform a telescopic movement, the slider 36 performs a linear reciprocating movement along the slide rail 35, and further enables the telescopic rod 42 to perform a telescopic movement along the slide rail 35.

[0043] The folding process of the folding device of the antenna element layer is as follows:

[0044] As Figure 1 , the folding device of the antenna element layer is in a fully unfolded state. At this time, the driver 41 drives the telescopic rod 42 to retract to the right, that is, the telescopic rod 42 moves to the right; since one end of the two second link rods 52 is hinged to one end of the telescopic rod 42 away from the driver 41, when the telescopic rod 42 moves to the right, it drives the hinge point between the telescopic rod 42 and the second link rod 52 to also move to the right; since the middle of the first link rod 51 is hinged to the middle of the second link rod 52, and the hinge point between the first link rod 51 and the second link rod 52 is also hinged to the second truss beam 20, and one end of the two third link rods 61 is hinged to the other end of the crossbeam main body 32, and the middle parts of the third link rods 61 are respectively hinged to the second truss beam 20, then when the hinge point between the telescopic rod 42 and the second link rod 52 moves to the right, it drives the first link rod 51 and the second link rod 52 to move to the right, and further drives the second truss beam 20 to move to the right. When the second truss beam 122 moves backward, it drives the third link rod 61 to rotate around the hinge point between the third link rod 61 and the crossbeam main body 32, and the hinge point between the second truss beam 20 and the third link rod 61 makes a circular motion. At the same time, the hinge point between the second truss beam 20 and the third link rod 61 approaches the crossbeam main body 32, that is, the second truss beam 20 folds inward.

[0045] Described from another perspective, the crossbeam main body 32, the first link rod 51, the second truss beam 20 and the third link rod 61 form a first four-bar linkage. When the hinge point between the second link rod 52 and the second truss beam 20 moves to the right and approaches the crossbeam main body 32, the first four-bar linkage is a movement with one degree of freedom, and then the second truss beam 122 will fold inward.

[0046] The above first four-bar linkage mechanism determines the movement trajectories of the second truss beam 20, the first link 51, the second link 52, and the third link 61. That is, the movement trajectories of the hinge points between the second link 52 and the second linkage rod 54, between the first link 51 and the first linkage rod 53, and between the third link 61 and the third linkage rod 62 are determined and unique. At the same time, the first link 51, the second link 52, the first linkage rod 53, and the second linkage rod 54 form a second four-bar linkage mechanism. In the second four-bar linkage mechanism, since the movement trajectories of the hinge points between the first link 51 and the second link 52, between the first link 51 and the first linkage rod 53, and between the second link 52 and the second linkage rod 54 are determined and unique, and the lengths of the first link 51, the second link 52, the first linkage rod 53, and the second linkage rod 54 remain unchanged, therefore, in the second four-bar linkage mechanism, the movement trajectory of the hinge point between the first linkage rod 53 and the second linkage rod 54 is determined and unique. Thus, the movement trajectory of the hinge point between the first linkage rod 53 and the first truss beam 10 is determined and unique; since the movement trajectory of the hinge point between the third link 61 and the third linkage rod 62 is determined and unique, the distance between the hinge point where the first linkage rod 53 is hinged to the first truss beam 10 and the hinge point where the third linkage rod 62 is hinged to the first truss beam 10 remains unchanged, and the length of the third linkage rod 62 remains unchanged. Thus, the movement trajectory of the hinge point between the third linkage rod 62 and the first truss beam 10 is determined and unique.

[0047] From the above, it can be obtained that the movement trajectory of the hinge point between the first linkage rod 53 and the first truss beam 10 is determined and unique, and the movement trajectory of the hinge point between the third linkage rod 62 and the first truss beam 10 is determined and unique. Thus, when the actuator 41 drives the telescopic rod 42 to retract, the first truss beam 10 also folds inward.

[0048] Finally, when the actuator 41 drives the telescopic rod 42 to retract to the designed value, the folding device of the antenna element layer is in a fully folded state. At this time, the two first truss beams 10 and the two second truss beams 20 are in a horizontal state, that is, the two first truss beams 10 are parallel to each other, the two second truss beams 20 are parallel to each other, and the first truss beam 10 and the second truss beam 20 are parallel to each other, as Figure 2 .

[0049] The unfolding process of the folding device of the antenna element layer is opposite to the folding process of the folding device of the antenna element layer, as Figure 2, that is, the driver 41 drives the telescopic rod 42 to extend leftward, drives the second link 52 to move leftward, and further drives the first link 51, the first linkage rod 53, the second linkage rod 54, the second truss beam 20 and the first truss beam 10 to perform corresponding movements, so that the first truss beam 10 and the second truss beam 20 move away from the crossbeam main body 32, and then the folding device of the antenna element layer is gradually unfolded; when the driver 41 drives the telescopic rod 42 to extend to the longest, the folding device of the antenna element layer is completely unfolded. At this time, the included angle between the first truss beam 10 and the adjacent second truss beam 20 is 7.07°, and the included angle between the two second truss beams 20 is 7.07°, as Figure 1 .

[0050] It should be noted that through the calculation of the mechanism motion degrees of freedom of the folding device of the antenna element layer of the present invention, the overall degree of freedom of the folding device of the antenna element layer is 1. Therefore, under the drive of the driver 41, it is a definite motion, and only needs to extend or retract to the design value according to the design value. At the same time, it should be noted that by modifying the lengths of the first link 31, the first linkage rod 32, the third link 61 and the third linkage rod 63 and the positions of the hinge points, the included angles between the two second truss beams 20 and between the first truss beam 10 and the adjacent second truss beam 20 after unfolding can also be made equal and any value, and the distances between the two first truss beams 10, between the two second truss beams 20, and between the first truss beam 10 and the second truss beam 20 are equal and remain horizontal after folding. At the same time, the folding device of the antenna element layer of the present invention is not limited to the field of communication equipment, and can also be used for structures with similar requirements in other industries.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A folding device for an antenna element layer, characterized in that, it includes: Two first truss beams; Two second truss beams, disposed between the two first truss beams; A support cross beam, including support legs and a cross beam body, the cross beam body being disposed between the two second truss beams; A telescopic driving mechanism, disposed on the cross beam body; A first link mechanism, including two first links, two second links and two first linkage rods; one end of each of the two first links is hinged to one end of the cross beam body, the middle parts of the first links are respectively hinged to the middle parts of the second links, and the hinge points between the first links and the second links are also respectively hinged to the second truss beams, the other ends of the first links are respectively hinged to one end of the first linkage rods, and the other ends of the first linkage rods are respectively hinged to the first truss beams; one end of each of the two second links is hinged to the telescopic driving mechanism; And A second link mechanism, the second link mechanism being disposed at a relatively spaced interval with respect to the first link mechanism; the second link mechanism includes two third links and two third linkage rods, one end of each of the two third links is hinged to the other end of the cross beam body; the middle parts of the third links are respectively hinged to the second truss beams; one end of each of the third linkage rods is respectively hinged to the other end of the third link, and the other ends of the third linkage rods are respectively hinged to the first truss beams; The length of the third link is greater than the lengths of the first link and the second link, and the length of the third linkage rod is greater than the length of the first linkage rod; when the folding device for the antenna element layer is in a fully unfolded state, the included angle between the first truss beam and the adjacent second truss beam is 5° - 15°, and the included angle between the two second truss beams is 5° - 15°.

2. The folding device for an antenna element layer according to claim 1, characterized in that, The first link mechanism further includes two second linkage rods, one end of each of the second linkage rods is respectively hinged to the other end of the second link, and the other ends of the second linkage rods are respectively hinged to one end of the first linkage rod close to the first truss beam.

3. The folding device for an antenna element layer according to claim 2, characterized in that, When the folding device for the antenna element layer is in a fully folded state, the two first truss beams are parallel to each other, the first truss beam is parallel to the second truss beam, and the two second truss beams are parallel to each other.

4. The folding device for an antenna element layer according to claim 1, characterized in that, The telescopic driving mechanism includes a driver disposed on the cross beam body and a telescopic rod connected to the driver, and one end of the telescopic rod away from the driver is hinged to one end of the two second links.

5. The folding device for an antenna element layer according to claim 4, characterized in that, An installation seat is disposed on the cross beam body, and one end of the driver away from the telescopic rod is hinged to the installation seat.

6. The folding device for an antenna element layer according to claim 1, characterized in that, The lengths of the two first truss beams are equal, the lengths of the two second truss beams are equal, and the length of the first truss beam is equal to the length of the second truss beam.

7. The folding device for the antenna element layer according to claim 1, wherein, the folding device for the antenna element layer has a first end and a second end which are oppositely arranged, the first link mechanism is arranged near the first end of the folding device for the antenna element layer, and the second link mechanism is arranged near the second end of the folding device for the antenna element layer.

8. The folding device for the antenna element layer according to claim 1, wherein, the support leg and the cross beam body are respectively arranged on opposite sides of the first link mechanism.

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