Underwater double-section swing type folding antenna assembly

Abstract

The utility model discloses an underwater double-section swing type folding antenna assembly, which comprises a base, a cover body, a fixed frame, a movable frame, an antenna assembly and a rope, and is characterized in that the base and the cover body can cover each other to form a sealed cavity, and the base and the cover body are locked and fixed through a bolt device; the fixed frame, the movable frame, the antenna assembly and the rope are all arranged in the cavity, the fixed frame is fixedly connected to the base, the first end of the movable frame is fixedly connected with a connecting seat, the second end of the movable frame is provided with the antenna assembly, the connecting seat is rotationally connected with the movable frame, a hollow rope winding cavity is formed in the connecting seat, and the rope winding cavity is connected with the movable frame. A rope winding roller is rotationally connected into the rope winding cavity, the rope winding roller and the connecting base are coaxial, one end of the rope is wound around the rope winding roller, and the other end of the rope is connected to the cover body. According to the utility model, the antenna equipment can be conveniently and rapidly unfolded underwater.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater equipment, and more specifically, to an underwater double-section swinging folding antenna assembly. Background Art

[0002] Due to the limitation of the size, marine equipment often adopts the design strategy of telescopic deployment to deal with the challenge of insufficient overall length. However, for deployment devices that need to be extended significantly, the traditional spring or hydraulic drive method often leads to limited extension length and reduced reliability due to its own length limitation and system complexity. At the same time, the accompanying cable pulling and fixing problems further weaken the reliability of use.

[0003] For common marine equipment, telescopic drive mechanisms, such as hydraulic or electric methods, combined with the inner and outer double tube structure design, are effectively used to realize the deployment and folding functions of the equipment. This design realizes flexible telescopic operation through the relative movement of the inner and outer tubes. However, in order to further improve the extension ratio of the equipment, that is, to increase the deployment length, the multi-stage set of inner and outer tube structures has become a common choice. Although this method can significantly extend the deployment distance of marine equipment, it also brings about a significant increase in structural complexity, which has an adverse effect on the overall structural stability of the marine equipment.

[0004] At present, underwater antenna equipment also adopts a folding structure to achieve the effect of storing and unfolding antenna components. The utility model also provides a different folding antenna solution to solve the problem of storing underwater antenna equipment. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an underwater double-section swinging folding antenna assembly, which can conveniently and quickly realize the underwater deployment of the antenna device.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An underwater double-stage swinging folding antenna assembly comprises a base, a cover body, a fixed frame, a movable frame, an antenna assembly and a cable, wherein the base and the cover body can cover each other and form a sealed chamber, and the base and the cover body are locked and fixed by a latch device; the fixed frame, the movable frame, the antenna assembly and the cable are all arranged in the chamber, the fixed frame is fixedly connected to the base, the first end of the movable frame is fixedly connected to a connecting seat, the second end of the movable frame is mounted with the antenna assembly, the connecting seat is rotatably connected to the movable frame, a hollow rope winding cavity is arranged in the connecting seat, a rope winding roller is rotatably connected in the rope winding cavity, the rope winding roller is coaxial with the connecting seat, one end of the rope is wound around the rope winding roller, and the other end is connected to the cover body.

[0008] The utility model is further configured that a wire passing channel is arranged in the movable frame, the wire passing channel passes through the first end and the second end, and the connecting seat is provided with a through hole connecting the wire passing channel and the rope winding cavity.

[0009] The utility model is further configured as follows: a first rotating shaft is fixedly connected to both sides of the connecting seat, the first rotating shaft passes through the movable frame and is rotatably connected to the movable frame; the first rotating shaft is a tubular structure with both ends penetrated, and the tube cavity of the first rotating shaft is connected to the rope winding cavity; the end of the rope winding roller is fixedly connected to a second rotating shaft, the second rotating shaft at least partially extends into the tube cavity of the first rotating shaft, and is rotatably connected to the first rotating shaft.

[0010] The utility model is further configured such that a threaded end is provided at one end of the second rotating shaft away from the rope winding roller, an outer circumference of the threaded end is provided with an external thread, and the external threads of the threaded ends of the two second rotating shafts have opposite rotation directions, and the threaded end extends out of the first rotating shaft;

[0011] The utility model is further configured such that the outer peripheral thread of the threaded end is connected with a linkage block, the linkage block is slidably connected to the fixing frame, and the sliding direction is consistent with the direction of the second rotating shaft; the linkage block is used to adapt to the first rotating shaft and can lock the first rotating shaft.

[0012] The utility model is further configured such that the linkage block is fixedly connected to a limiting sleeve on a side facing the rope winding roller, and a second limiting portion is arranged on an inner periphery of the limiting sleeve; the first rotating shaft is fixedly connected to a limiting end on a side facing the linkage block, and a first limiting portion is arranged on an outer periphery of the limiting end, and the first limiting portion is adapted to the second limiting portion for axially limiting the rotation of the second rotating shaft.

[0013] The utility model is further configured such that the second limiting portion is a limiting groove opened on the inner circumference of the limiting sleeve, and the limiting grooves are provided in a plurality and distributed in a circular array; the first limiting portion is a limiting block fixedly connected to the outer circumference of the limiting end, and the number and position of the limiting blocks correspond one-to-one to the limiting grooves and are adapted to each other.

[0014] The utility model is further configured such that a chamfer is formed on the inner periphery of the limiting sleeve toward the limiting end, and a chamfer is formed on the outer periphery of the limiting end toward the limiting sleeve.

[0015] The utility model is further configured that the limit groove is arranged along the axial direction of the second rotating shaft and penetrates toward the second rotating shaft; a flaring transition is formed at the opening of the limit groove; and the width of the limit block gradually increases from the rope winding roller toward the thread end.

[0016] The utility model is further configured such that a guide slide rod is fixedly connected to a side of the linkage block facing the connecting seat, and the guide slide rod is arranged along the axial direction of the second rotating shaft; a guide slide hole is opened in the fixed frame, and the guide slide rod is slidably connected to the guide slide hole; a protrusion is fixedly connected to a side of the guide slide rod away from the linkage block, and the protrusion is used to limit the sliding stroke of the guide slide rod.

[0017] The utility model is further configured such that a tapered end is formed on the side of the guide sliding rod away from the linkage block, and a socket is opened on the outside of the connecting seat, the socket is opposite to and adapted to the tapered end of the guide sliding rod, and the tapered end can extend into the socket to realize the rotation limit of the connecting seat and the fixing frame.

[0018] In summary, the utility model has the following beneficial effects:

[0019] Through the folding structure, the fixed frame and the movable frame can be folded and unfolded. In the folded state, it has a smaller volume, which is convenient for the storage, handling and transportation of the foldable antenna; and in the unfolded state, it has a higher height, so that the fixed frame and the movable frame can be maintained at a higher height position, so that the antenna device can facilitate the transmission and reception of signals.

[0020] By winding the rope outside the rope winding roller, the rope winding roller is coaxial with the rotation center of the fixed frame and the movable frame. When the rope is pulled out, a threaded linkage can be generated, which can drive the locking structure to lock the fixed frame and the movable frame, and the two can be stably maintained and locked in a fixed position.

[0021] In the initial unfolded state, the movable frame and the fixed frame can rotate smoothly. At this time, the limit sleeve and the limit end will not be locked immediately, and no sudden impact will occur, which can prevent the locking part from breaking due to excessive impact load. During the locking process of the limit sleeve and the limit end, the movable frame and the fixed frame have been fully unfolded, and only slight shaking will occur. During the locking process, the limit slot and the limit block are subjected to a small load, which avoids damage to both and ensures the structural stability and strength performance of both. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of an underwater double-stage swinging folding antenna assembly in the initial state of this embodiment;

[0023] Figure 2 It is a structural schematic diagram of an underwater double-section swinging folding antenna assembly in the present embodiment in an unfolded state;

[0024] Figure 3 Schematic diagram of the structure of the connection between the movable frame and the fixed frame in this embodiment;

[0025] Figure 4Schematic diagram of the structure of the second limiting portion in this embodiment;

[0026] Figure 5 Schematic diagram of the structure of the first limiting portion in this embodiment.

[0027] Figure numerals: base 1; cover body 2; latch device 3; fixing frame 4; gear lever 41; movable frame 5; first end 51; second end 52; wire passage 53; mounting seat 6; antenna assembly 7; cable 8; connecting portion 9; connecting seat 10; first rotating shaft 101; rope winding cavity 102; through hole 103; limiting end 104; first limiting portion 105; limiting block 1051; rope winding roller 11; retaining ring 111; second rotating shaft 112; threaded end 113; linkage block 12; limiting sleeve 121; second limiting portion 122; limiting groove 1221; guide slide rod 13; guide slide hole 131; tapered end 132; protrusion 133; socket 134. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] This embodiment discloses an underwater double-section swinging folding antenna assembly, referring to Figure 1-Figure 5 As shown, it includes a base 1, a cover body 2, a fixed frame 4, a movable frame 5, an antenna assembly 7 and a cable 8. The cover body 2 is roughly a cylindrical structure, one end is open, the other end is closed, and it is a hemispherical closed structure; the base 1 and the cover body 2 are adapted to each other, and the cover body 2 can be covered on the base 1 and covered with each other to form a sealed chamber between the base 1 and the cover body 2.

[0030] The base 1 and the cover 2 are locked and fixed by a latch device 3. The latch device 3 uses an electric or electromagnetically driven latch, which can latch and lock the base 1 and the cover 2 after they are covered. When the base 1 and the cover 2 need to be opened, the latch device 3 can be opened, so that the two can be separated and opened.

[0031] The fixed frame 4, movable frame 5, antenna assembly 7 and cable 8 of the antenna device are all arranged in a chamber surrounded by the base 1 and the cover 2. The fixed frame 4 is fixedly connected to the base 1, and the movable frame 5 is connected to the upper end of the fixed frame 4. The movable frame 5 is connected to the fixed frame 4 by a rotating connection structure, wherein the first end of the movable frame 5 is fixedly connected with a connecting seat 10, and the second end of the movable frame 5 is installed with the antenna assembly 7. The mounting seat 6 of the antenna assembly 7 is installed together with the second end of the movable frame 5, and the electric control components required by the antenna assembly 7 can be accommodated in the mounting seat 6.

[0032] Reference Figure 3 As shown, the connecting seat 10 is rotatably connected with the movable frame 5, a hollow rope winding chamber 102 is provided in the connecting seat 10, and a rope winding roller 11 is rotatably connected in the rope winding chamber 102, and the rope winding roller 11 is coaxial with the connecting seat 10. One end of the rope 8 is wound around the rope winding roller 11, and two retaining rings 111 are fixedly connected to the outer periphery of the rope winding roller 11. One end of the rope 8 is wound around the outer periphery of the rope winding roller 11 between the two retaining rings 111, and the retaining rings 111 can limit the winding position of the rope 8. The other end of the rope 8 is connected to the cover body 2, and is connected to the connecting portion 9 at the top of the inner side of the cover body 2.

[0033] The cable 8 can play a pulling role when the cover body 2 is separated, and then can drive the cable 8. When the cable 8 is pulled, it will drive the rope roller 11 to rotate, and then can gradually lock the fixed frame 4 and the movable frame 5 through the linkage component at the rotating shaft, and the position of the antenna is supported and fixed.

[0034] In order to allow the cable 8 to pass smoothly, a wire passage 53 is provided in the movable frame 5, and the wire passage 53 passes through the first end 51 and the second end 52. The connecting seat 10 is provided with a through hole 103 connecting the wire passage 53 and the rope winding cavity 102. In addition, interconnected holes are also provided in the mounting seat 6 of the antenna device so that the cable 8 can pass through.

[0035] Reference Figure 3 , Figure 4 and Figure 5 , the connection structure of the rotating shaft of the fixed frame 4 and the movable frame 5 is described in detail. The two sides of the connecting seat 10 are fixedly connected with the first rotating shaft 101, and the two first rotating shafts 101 are coaxial structures. The two first rotating shafts 101 extend to both sides respectively, and can penetrate the side walls of the movable frame 5, and are rotatably connected to the movable frame 5. The rotating part can be supported by a bearing component, which is not specifically shown in the figure.

[0036] The first rotating shaft 101 is a tubular structure with two ends connected, and the lumen of the first rotating shaft 101 is connected to the rope winding lumen 102. The end of the rope winding roller 11 is fixedly connected to the second rotating shaft 112, the outer diameter of the second rotating shaft 112 is adapted to the inner diameter of the lumen of the first rotating shaft 101, and the second rotating shaft 112 at least partially extends into the lumen of the first rotating shaft 101 and is rotatably connected to the first rotating shaft 101. The fixed frame 4, the first rotating shaft 101 and the second rotating shaft 112 respectively form coaxial and mutually sleeved connection structures, which can generate relative rotation.

[0037] In addition, a threaded end 113 is formed at one end of the second rotating shaft 112 away from the rope winding roller 11, and an external thread is arranged on the outer periphery of the threaded end 113. Moreover, the external threads of the threaded ends 113 of the two second rotating shafts 112 are rotated in opposite directions, and the threaded ends 113 extend out of the first rotating shaft 101. When the rope winding roller 11 is driven to rotate by the cable 8, the two second rotating shafts 112 will rotate synchronously with the rope winding roller 11, and the threaded ends 113 on both sides will also rotate synchronously.

[0038] The outer periphery of the threaded end 113 is threadedly connected with a linkage block 12, which is used as a locking component to achieve relative thread movement during the rotation of the threaded end 113. In order to limit the rotation of the linkage block 12, the linkage block 12 can be slidably connected to the fixing frame 4, and the sliding direction is consistent with the direction of the second rotating shaft 112, so as to guide the movement direction of the linkage block 12.

[0039] Specifically, a guide slide rod 13 may be fixedly connected to the side of the linkage block 12 facing the connection seat 10, and the guide slide rod 13 is arranged along the axial direction of the second rotating shaft 112. A guide slide hole is provided in the fixing frame 4, and the guide slide rod 13 is slidably connected to the guide slide hole, thereby being able to guide the movement of the linkage block 12. In addition, a protrusion 133 is fixedly connected to the side of the guide slide rod 13 away from the linkage block 12, and the protrusion 133 can play a role in limiting the sliding stroke of the guide slide rod 13.

[0040] The linkage block 12 and the end of the first rotating shaft 101 can be adapted to each other. When the linkage block 12 is subjected to threaded movement, it will be close to the end of the first rotating shaft 101. Then, the linkage block 12 and the end of the first rotating shaft 101 will be able to be relatively sleeved and locked, thereby achieving locking and fixing of the two, which can limit the movable frame 5 to the unfolded position.

[0041] Specifically, the linkage block 12 is fixedly connected to a limiting sleeve 121 on one side facing the rope winding roller 11, and a second limiting portion 122 is provided on the inner circumference of the limiting sleeve 121. The first rotating shaft 101 is fixedly connected to a limiting end 104 on one side facing the linkage block 12, and the limiting end 104 is the end position of the first rotating shaft 101 extending through the fixing frame. A first limiting portion 105 is provided on the outer circumference of the limiting end 104, and the first limiting portion 105 is adapted to the second limiting portion 122, and the adaptation of the two can axially limit the rotation of the second rotating shaft 112.

[0042] Reference Figure 4 , Figure 5 As shown, the second limiting portion 122 is a limiting groove provided on the inner circumference of the limiting sleeve 121, and there are six limiting grooves, which are arranged in a circular array. The first limiting portion 105 is a limiting block fixedly connected to the outer circumference of the limiting end 104, and the number and position of the limiting blocks correspond to the limiting grooves one by one, and there are six limiting blocks, which are adapted to each other. When the linkage block 12 moves axially toward the first rotating shaft 101, the limiting sleeve 121 can be gradually sleeved to the end of the first rotating shaft 101, so that the limiting groove and the limiting block can correspond to each other, and the sleeve can be sleeved, thereby playing the role of axial rotation limiting for the first rotating shaft 101.

[0043] Furthermore, the inner circumference of the limiting sleeve 121 is chamfered toward the limiting end 104, and the outer circumference of the limiting end 104 is chamfered toward the limiting sleeve 121. When the limiting end 104 extends into the limiting sleeve 121, it can play a relative limiting role, so that the two can be smoothly mounted and interlocked.

[0044] The limiting groove is arranged along the axial direction of the second rotating shaft 112 and is through in the direction of the second rotating shaft 112, that is, the limiting groove is open toward one end of the limiting block, and the limiting block can be inserted. In addition, a flaring transition is formed at the opening of the limiting groove, which can play a guiding role at the flaring of the end of the limiting groove; and the width of the limiting block also adopts a transitional change state, with a smaller width toward one end of the limiting groove, and gradually increases from the rope winding roller 11 to the threaded end 113. That is, when the limiting sleeve 121 is first sleeved to the limiting end 104, the end of the narrower limiting block can be inserted into the opening of the wider limiting groove, and has a larger angle of tolerance space, and then as the limiting block is gradually inserted, the two can be gradually aligned until the limiting block and the limiting groove are clamped and fixed to each other, so that the movable frame 5 can be limited to the unfolded position, that is, the antenna assembly at the upper end of the movable frame 5 can face upward.

[0045] Furthermore, a tapered end 132 is formed on the side of the guide slide rod 13 away from the linkage block 12, and a plug hole 134 is provided on the outside of the connection seat 10, and the plug hole 134 is opposite to and adapted to the tapered end 132 of the guide slide rod 13. The tapered end 132 can be inserted into the plug hole 134 to achieve rotational limit between the connection seat 10 and the fixed frame 4. In addition, after the linkage block 12 moves a certain distance toward one side of the rope winding roller 11, that is, after the limit sleeve 121 and the outer periphery of the limit end 104 are mutually limited, the tapered end 132 at the end of the guide slide rod 13 can be gradually inserted into the plug hole 134, and the guide slide rod 13 cooperates with the plug hole 134 to achieve limit between the fixed frame and the movable frame, playing a role of activity supplement.

[0046] Principle of this embodiment:

[0047] In the initial state of the underwater folding antenna device, the base 1 and the cover 2 are covered with each other, and other components are installed in the chamber between the two. Figure 1 As shown; when the underwater folding antenna device needs to be opened, the base 1 and the cover 2 are separated from each other, and the base 1 and the cover 2 produce relative movement, that is, the base 1 moves downward relative to the cover 2. During the separation process, the base 1 and the cover 2 play a related linkage through the cable 8;

[0048] During the separation process of the base 1 and the cover 2, the cable 8 will be pulled out along the wire passage 53. Under the action of the cable 8, the second end 52 of the movable frame 5 will rotate and swing upward, and the entire antenna device will be in a roughly open state. Figure 2 shown.

[0049] In the initial state, the limiting sleeve 121 of the linkage block 12 and the limiting end 104 of the first rotating shaft 101 are separated from each other, so that the two can rotate smoothly, thereby allowing the movable frame 5 to rotate from the folded state to the unfolded state. When the movable frame 5 rotates to the unfolded state, the positions of the first limiting portion 105 and the second limiting portion 122 can be roughly opposite.

[0050] When the cable 8 is pulled out, since the cable 8 is wound outside the rope winding roller 11, it will drive the rope winding roller 11 to rotate, and the two second rotating shafts 112 will rotate synchronously with the rope winding roller 11, and the threaded ends 113 on both sides will also rotate synchronously. The threads of the threaded ends 113 are thread-matched with the linkage block 12, which will drive the linkage block 12 to move in the direction of the threaded ends 113. Then, the limiting sleeve 121 will gradually be sleeved on the limiting end 104 of the first rotating shaft 101, and the limiting groove 1221 and the limiting block 1051 will gradually be sleeved on each other, and then gradually face each other, thereby realizing the locking between the linkage block 12 and the first rotating shaft 101, and then the first rotating shaft 101, that is, the connecting seat 10 and the movable frame 5, can be locked and fixed in the unfolded position.

[0051] Moreover, since the movable frame 5 and the fixed frame 4 can rotate smoothly in the initial unfolded state, the limiting sleeve 121 and the limiting end 104 will not be locked immediately, and thus no sudden impact will occur, which can prevent the locking part from being broken due to excessive impact load. During the locking process of the limiting sleeve 121 and the limiting end 104, the movable frame 5 and the fixed frame 4 have been fully unfolded, and only slight shaking will occur. During the locking process, the limiting groove 1221 and the limiting block 1051 are subjected to a small load, which prevents damage to the two, and can also ensure the structural stability and strength performance of the two.

[0052] The locking structure in the current technology uses a latch-shaped structure to directly lock at the rotating shaft, that is, when the movable frame and the fixed frame are unfolded from the initial state, they rotate from the folded state to the unfolded state with a large speed and impact. When locking, the locking structure will bear a large impact, which can easily directly cause the latch structure to break, resulting in the fixed frame and the locking frame being unable to maintain a locked state. The use of this structure in this embodiment can greatly avoid this problem.

[0053] Furthermore, in this embodiment, the rope 8 can be cut by other preset electric shearing devices to completely separate the base 1 from the cover 2; or, the rope 8 can be kept connected at all times to facilitate subsequent recovery or other operations.

[0054] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An underwater double-stage swinging folding antenna assembly, characterized in that: The invention comprises a base (1), a cover (2), a fixed frame (4), a movable frame (5), an antenna assembly (7) and a cable (8); the base (1) and the cover (2) can be covered with each other to form a sealed chamber; the base (1) and the cover (2) are locked and fixed by a latch device (3); the fixed frame (4), the movable frame (5), the antenna assembly (7) and the cable (8) are all arranged in the chamber; the fixed frame (4) is fixedly connected to the base (1); the movable frame (5) is The first end of the movable frame (5) is fixedly connected to a connecting seat (10), the second end of the movable frame is installed with an antenna assembly (7), the connecting seat (10) is rotatably connected to the movable frame (5), a hollow rope winding chamber (102) is arranged in the connecting seat (10), a rope winding roller (11) is rotatably connected in the rope winding chamber (102), the rope winding roller (11) is coaxial with the connecting seat (10), one end of the rope (8) is wound around the rope winding roller (11), and the other end is connected to the cover body (2).

2. The underwater double-stage swinging folding antenna assembly according to claim 1, characterized in that: The movable frame (5) is provided with a wire passage (53) which passes through the first end (51) and the second end (52); the connecting seat (10) is provided with a through hole (103) which connects the wire passage (53) and the rope winding cavity (102).

3. The underwater double-stage swinging folding antenna assembly according to claim 1, characterized in that: A first rotating shaft (101) is fixedly connected to both sides of the connecting seat (10), the first rotating shaft (101) passes through the movable frame (5) and is rotatably connected to the movable frame (5); the first rotating shaft (101) is a tubular structure with two ends passing through, and the tube cavity of the first rotating shaft (101) is connected to the rope winding cavity (102); a second rotating shaft (112) is fixedly connected to the end of the rope winding roller (11), the second rotating shaft (112) at least partially extends into the tube cavity of the first rotating shaft (101), and is rotatably connected to the first rotating shaft (101).

4. The underwater double-stage swinging folding antenna assembly according to claim 3, characterized in that: A threaded end (113) is provided at one end of the second rotating shaft (112) away from the rope winding roller (11), an outer circumference of the threaded end (113) is provided with an external thread, and the external threads of the threaded ends (113) of the two second rotating shafts (112) have opposite rotation directions, and the threaded end (113) extends out of the first rotating shaft (101); The outer periphery of the threaded end (113) is threadedly connected to a linkage block (12); the linkage block (12) is slidably connected to the fixing frame (4), and the sliding direction is consistent with the direction of the second rotating shaft (112); the linkage block (12) is used to adapt to the first rotating shaft (101) and can lock the first rotating shaft (101).

5. The underwater double-stage swinging folding antenna assembly according to claim 4, characterized in that: The linkage block (12) is fixedly connected to a limiting sleeve (121) on one side facing the rope winding roller (11), and a second limiting portion (122) is arranged on the inner periphery of the limiting sleeve (121); the first rotating shaft (101) is fixedly connected to a limiting end (104) on one side facing the linkage block (12), and a first limiting portion (105) is arranged on the outer periphery of the limiting end (104), and the first limiting portion (105) is adapted to the second limiting portion (122) and is used to axially limit the rotation of the second rotating shaft (112).

6. The underwater double-section swinging folding antenna assembly according to claim 5, characterized in that: The second limiting portion (122) is a limiting groove opened on the inner circumference of the limiting sleeve (121), and a plurality of the limiting grooves are provided and distributed in a circular array; the first limiting portion (105) is a limiting block fixedly connected to the outer circumference of the limiting end (104), and the number and position of the limiting blocks correspond one-to-one to the limiting grooves and are mutually adapted.

7. The underwater double-stage swinging folding antenna assembly according to claim 6, characterized in that: The inner periphery of the limiting sleeve (121) is formed with a chamfer on the side facing the limiting end (104), and the outer periphery of the limiting end (104) is formed with a chamfer on the side facing the limiting sleeve (121).

8. The underwater double-section swinging folding antenna assembly according to claim 6, characterized in that: The limiting groove is arranged along the axial direction of the second rotating shaft (112) and is through in the direction of the second rotating shaft (112); a flaring transition is formed at the opening of the limiting groove; and the width of the limiting block gradually increases from the rope winding roller (11) toward the threaded end (113).

9. The underwater double-section swinging folding antenna assembly according to claim 4, characterized in that: A guide slide rod (13) is fixedly connected to one side of the linkage block (12) facing the connecting seat (10), and the guide slide rod (13) is arranged along the axial direction of the second rotating shaft (112); the fixing frame (4) is provided with a guide slide hole, and the guide slide rod (13) is slidably connected to the guide slide hole; a protrusion (133) is fixedly connected to one side of the guide slide rod (13) away from the linkage block (12), and the protrusion (133) is used to limit the sliding stroke of the guide slide rod (13).

10. The underwater double-section swinging folding antenna assembly according to claim 9, characterized in that: A conical end (132) is formed on the side of the guide slide rod (13) away from the linkage block (12), and a plug hole (134) is provided on the outside of the connecting seat (10). The plug hole (134) is opposite to and adapted to the conical end (132) of the guide slide rod (13), and the conical end (132) can extend into the plug hole (134) to achieve rotational limiting of the connecting seat (10) and the fixing frame (4).

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