Ship berthing outer plate reinforcing structure

Abstract

The utility model discloses a ship berthing outer plate reinforcing structure, which relates to the technical field of reinforcing structures and comprises a metal frame, a positioning frame is slidably connected to one side of the bottom surface of the metal frame, the metal frame is located in the center of the positioning frame, and the outer wall of one end of a bidirectional threaded shaft is fixedly connected with the output end of a first motor. And one end of the outer wall of the bidirectional threaded shaft is rotationally connected with one side of the interior of the metal frame through the output end of a first motor, and one side of the outer wall of the buffer plate is connected with the center of the outer wall of the metal frame in a penetrating mode. The distance between the buffer plate and the wharf is precisely adjusted to ensure that the ship can be properly buffered and protected when berthing, the position of the buffer plate can be precisely adjusted through positive and negative rotation control of the first motor in the adjusting process to enable the buffer plate to adapt to ships of different sizes and types, in addition, after the ship leaves, the buffer plate can be conveniently reset, and the ship can be prevented from falling off. And preparation is made for berthing of the next ship.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforced structures, in particular to a ship mooring outer plate reinforced structure. Background Art

[0002] The design and material selection of the ship's mooring outer plate are crucial to improving its protective effectiveness. Modern mooring outer plates are usually made of high-strength, wear-resistant materials such as rubber, steel or composite materials, which can absorb and disperse the impact generated by the ship's docking, and have good wear and corrosion resistance, and are suitable for various marine environments. A layer of anti-skid material, such as rubber or special coating, may also be applied to the surface of the outer plate to increase friction with the ship and prevent the ship from sliding or shifting when berthing.

[0003] At present, the existing ship mooring outer plate is usually a whole piece of buffer plate fixed on the outer wall of the dock. Although this structure can reduce the direct collision between the ship and the dock to a certain extent, it is impossible to adjust the distance between the mooring outer plate and the dock according to the specific needs of different ships. This fixing method also means that all ships must adapt to the same berthing distance, which may result in some ships not being optimally protected. In view of this, we provide a ship mooring outer plate reinforcement structure. Utility Model Content

[0004] The purpose of the utility model is to make up for the deficiencies of the prior art and to provide a ship mooring outer plate reinforcement structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a ship mooring outer plate reinforcement structure, including a metal frame, a positioning frame is slidably connected to one side of the bottom surface of the metal frame, and the metal frame is located at the inner center of the positioning frame, a buffer plate is slidably connected to the side of the outer wall of the positioning frame away from the metal frame, and the buffer plate is located on the outer side of the positioning frame, a No. 1 motor is fixedly connected to one side of the inner wall of the metal frame, and a two-way threaded shaft is rotatably connected to one side of the inner side of the metal frame, the outer wall of one end of the two-way threaded shaft is fixedly connected to the output end of the No. 1 motor, and one end of the outer wall of the two-way threaded shaft is rotatably connected to the inner side of the metal frame through the output end of the No. 1 motor, one side of the outer wall of the buffer plate is connected to the center of the outer wall of the metal frame, and one side of the outer wall of the buffer plate is slidably connected to the inner side of the metal frame, and the inner side of the buffer plate is slidably connected to the inner side of the metal frame through the two-way threaded shaft.

[0006] As mentioned above, the inner center of the positioning frame is fixedly connected with multiple slide rails at the same time, and the inner center of the positioning frame is slidably connected with a positioning plate through the slide rails. One side of the outer wall of the positioning plate is located on the inner side of the metal frame, and the bottom of the outer wall of the positioning plate is engaged with the inner side of the metal frame.

[0007] As mentioned above, the outer wall of the positioning plate away from the metal frame is fixedly connected with a positioning spring, and the outer wall of one end of the positioning spring is fixedly connected to one side of the inner wall of the positioning frame. The top end of the positioning frame is slidably connected with a top plate, and the bottom end of one side of the top plate corresponds to one side of the top surface of the positioning plate.

[0008] As mentioned above, a return spring is fixedly connected to the center of the bottom surface of the top plate, guide rails are fixedly connected to the two sides of the interior of the positioning frame, and the center of the interior of the positioning frame is slidably connected to the two sides of the outer wall of the metal frame through the guide rails.

[0009] As mentioned above, the metal frame and the buffer plate are slidably connected to multiple limit rails on both sides, and the metal frame and the buffer plate are slidably connected to multiple limit shafts on both sides through the limit rails. The metal frame and the buffer plate are rotatably connected to connecting rods on both sides through the limit shafts, and the limit shafts are located at both ends of the outer walls of the connecting rods.

[0010] In the above, the inner center of the connecting rod is rotatably connected with the limiting rod, and the connecting rod is located at the limiting rod. The outer wall of one end of the limiting rod is connected to the inner center of the connecting rod through and through, and one end of the outer wall of the limiting rod is rotatably connected to the inner center of the connecting rod.

[0011] As mentioned above, a plurality of driving plates are slidably connected to one side of the interior of the metal frame, and the driving plates are located at both ends of the outer wall of the bidirectional threaded shaft, the connecting rod is located on both sides of the outer wall of the driving plate, and the outer wall on one side of the driving plate is rotatably connected to the corresponding surface of the connecting rod, the outer wall at one end of the bidirectional threaded shaft is connected through the center of the outer wall of the connecting rod, and the inner center of the connecting rod is rotatably connected to one end of the outer wall of the bidirectional threaded shaft through a thread.

[0012] Compared with the prior art, the ship berthing outer plate reinforcement structure has the following beneficial effects:

[0013] When the metal frame is in a state of being moved to the outside of the positioning plate, the positioning spring pushes the positioning plate along the outer wall of the slide rail to the inner side of the metal frame, and the bottom side of the positioning plate is engaged with the inner wall of the metal frame, so that the metal frame is fixed in the positioning frame. When the device needs to be disassembled, it is only necessary to press the top plate into the positioning frame so that the bottom end of one side of the top plate pushes the positioning plate along the outer wall of the slide rail to return to the inner side of the positioning frame, so that the positioning plate and the metal frame transition from the engaged state to the non-engaged state. At this time, the metal frame can be pulled upward along the outer wall of the guide rail to remove the metal frame from the positioning frame, thereby realizing the rapid installation and disassembly of the device, making the connection between the metal frame and the positioning frame more stable, and at the same time facilitating the operator to quickly replace or maintain the metal frame as needed.

[0014] 2. According to the utility model, when a ship is about to dock at the dock and the device needs to adjust the distance between the berthing outer plate and the dock according to the specific needs of different ships, the output end of the No. 1 motor drives the two-way threaded shaft to rotate, and the threads provided on its outer wall respectively drive the driving plate to move toward the inner center of the two-way threaded shaft. When the driving plate drives the connecting rod and the limit shaft to move along the outer wall of the limit rail, the buffer plate is pushed out to the side away from the metal frame by tightening the distance between the connecting rods, so that the distance between the berthing outer plate and the dock can be precisely adjusted to meet the docking needs of different ships, so that the two-way threaded shaft, the limit rail and the connecting rod cooperate with each other, and the distance between the buffer plate and the dock is precisely adjusted to ensure that the ship can get proper buffer protection when docking. The adjustment process can be precisely adjusted through the forward and reverse control of the No. 1 motor to adapt to ships of different sizes and types. In addition, after the ship leaves, it can be easily reset to prepare for the docking of the next ship.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a partially cutaway exploded three-dimensional structural schematic diagram of the positioning frame of the utility model;

[0018] Figure 3 It is a partially cutaway exploded three-dimensional structural schematic diagram of the positioning frame and the metal frame of the utility model;

[0019] Figure 4 For this utility model Figure 3 Schematic diagram of the local three-dimensional structure of A;

[0020] Figure 5 It is a partially cutaway exploded three-dimensional structural schematic diagram of the metal frame and buffer plate of the utility model;

[0021] Figure 6 It is a partial exploded three-dimensional structural schematic diagram of the connecting rod of the utility model.

[0022] In the figure: 1. Metal frame; 2. Positioning frame; 201. Slide rail; 202. Positioning plate; 203. Positioning spring; 204. Top plate; 205. Return spring; 206. Guide rail; 3. Buffer plate; 301. No. 1 motor; 302. Bidirectional threaded shaft; 303. Limit rail; 304. Limit shaft; 305. Connecting rod; 306. Limit rod; 307. Drive plate. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-6 As shown, the utility model provides a technical solution: a ship berthing outer plate reinforcement structure, including a metal frame 1, a positioning frame 2 is slidably connected to one side of the bottom surface of the metal frame 1, and the metal frame 1 is located at the inner center of the positioning frame 2, a buffer plate 3 is slidably connected to the side of the outer wall of the positioning frame 2 away from the metal frame 1, and the buffer plate 3 is located on the outer side of the positioning frame 2, a No. 1 motor 301 is fixedly connected to one side of the inner wall of the metal frame 1, and a two-way threaded shaft 302 is rotatably connected to one side of the inner side of the metal frame 1, the outer wall of one end of the two-way threaded shaft 302 is fixedly connected to the output end of the No. 1 motor 301, and one end of the outer wall of the two-way threaded shaft 302 is rotatably connected to the inner side of the metal frame 1 through the output end of the No. 1 motor 301, one side of the outer wall of the buffer plate 3 is connected to the center of the outer wall of the metal frame 1, and one side of the outer wall of the buffer plate 3 is slidably connected to one side of the inner side of the metal frame 1, and one side of the inner side of the buffer plate 3 is slidably connected to one side of the inner side of the metal frame 1 through the two-way threaded shaft 302.

[0025] When installing the device, align the grooves on both sides of the outer wall of the metal frame 1 with the guide rail 206, and then put the metal frame 1 into the inner center of the positioning frame 2 along the outer wall of the guide rail 206. When the inclined surface of the positioning plate 202 on one side of the bottom surface of the metal frame 1 contacts, the bottom surface of the metal frame 1 pushes the positioning plate 202, so that the positioning plate 202 is retreated along the outer wall of the slide rail 201 to the inner center of the positioning frame 2, and the positioning plate 202 compresses the positioning spring 203. When the groove on one side of the outer wall of the metal frame 1 moves to the outer side of the positioning plate 202, the positioning spring 203 pushes the positioning plate 202 along the outer wall of the slide rail 201 to the inner center of the metal frame 1 through its own characteristics. The top plate 204 is pressed against the inner wall of the metal frame 1 and the bottom surface of the positioning plate 202 is engaged with the inner wall of the metal frame 1. The metal frame 1 is fixed to the inside of the positioning frame 2. When the device needs to be disassembled, it is only necessary to press the top plate 204 toward the inside of the positioning frame 2 so that the bottom end of the top plate 204 contacts the top inclined surface of the positioning plate 202, and push the positioning plate 202 back along the outer wall of the slide rail 201 to the inside of the positioning frame 2, so that the positioning plate 202 and the metal frame 1 transition from the engaged state to the unengaged state. At this time, the metal frame 1 can be pulled upward along the outer wall of the guide rail 206 to remove the metal frame 1 from the inside of the positioning frame 2. When a ship is about to dock at the dock, and the device needs to adjust the distance between the mooring outer plate and the dock according to the specific needs of different ships, the first motor 301 on the inner side of the metal frame 1 is started, and the output end of the first motor 301 drives the bidirectional threaded shaft 302 to rotate on the inner side of the metal frame 1, and the threads provided on its outer wall respectively drive multiple driving plates 307 at both ends of its outer wall to move toward the inner center of the bidirectional threaded shaft 302, and the limit rod 306 is passed through the inner center of the connecting rod 305 and rotated. When the driving plate 307 drives the connecting rod 305 and the limit shaft 304 to move along the outer wall of the limit rail 303, the connecting rod 305 is tightened. The distance between the outer berthing plate and the dock can be precisely adjusted by pushing the buffer plate 3 out to the side away from the metal frame 1 to meet the docking requirements of different ships, so that the two-way threaded shaft 302, the limit rail 303 and the connecting rod 305 cooperate with each other to precisely adjust the distance between the buffer plate 3 and the dock to ensure that the ship can get proper buffer protection when docking. The adjustment process can accurately adjust the position of the buffer plate 3 to adapt to ships of different sizes and types through the forward and reverse control of the No. 1 motor 301. In addition, after the ship leaves, it can be easily reset to prepare for the docking of the next ship.

[0026] like Figure 1-4As shown, a plurality of slide rails 201 are fixedly connected to the inner center of the positioning frame 2 at the same time, and a positioning plate 202 is slidably connected to the inner center of the positioning frame 2 through the slide rails 201, one side of the outer wall of the positioning plate 202 is located on the inner side of the metal frame 1, and the bottom of the outer wall of the positioning plate 202 is engaged with the inner side of the metal frame 1, a positioning spring 203 is fixedly connected to the outer wall of the side of the positioning plate 202 away from the metal frame 1, and the outer wall of one end of the positioning spring 203 is fixedly connected to one side of the inner wall of the positioning frame 2, a top plate 204 is slidably connected to the top end of the inner top of the positioning frame 2, and the bottom end of one side of the top plate 204 corresponds to one side of the top surface of the positioning plate 202, a return spring 205 is fixedly connected to the bottom center of the top plate 204, guide rails 206 are fixedly connected to the inner sides of the positioning frame 2, and the inner center of the positioning frame 2 is slidably connected to the outer walls of the metal frame 1 through the guide rails 206.

[0027] When installing the device, align the grooves on both sides of the outer wall of the metal frame 1 with the guide rail 206, and then put the metal frame 1 into the inner center of the positioning frame 2 along the outer wall of the guide rail 206. When the inclined surface of the positioning plate 202 on one side of the bottom surface of the metal frame 1 hits, the bottom surface of the metal frame 1 pushes the positioning plate 202, so that the positioning plate 202 is retreated along the outer wall of the slide rail 201 to the inner center of the positioning frame 2, and the positioning plate 202 compresses the positioning spring 203. When the groove on one side of the outer wall of the metal frame 1 moves to the outer side of the positioning plate 202, the positioning spring 203 pushes the positioning plate 202 along the outer wall of the slide rail 201 to the inner side of the metal frame 1 through its own characteristics, and makes the bottom side of the positioning plate 202 engage with the inner wall of one side of the metal frame 1. The positioning plate 202 is engaged with one side of the inside of the metal frame 1 to fix the metal frame 1 inside the positioning frame 2. When the device needs to be disassembled, it is only necessary to press the top plate 204 toward the inside of the positioning frame 2 so that the bottom end of one side of the top plate 204 contacts the top inclined surface of the positioning plate 202, and push the positioning plate 202 back along the outer wall of the slide rail 201 to the inside of the positioning frame 2, so that the positioning plate 202 and the metal frame 1 transition from the engaged state to the unengaged state. At this time, the metal frame 1 is pulled upward along the outer wall of the guide rail 206 to remove the metal frame 1 from the inside of the positioning frame 2, thereby realizing rapid installation and disassembly of the device, making the connection between the metal frame 1 and the positioning frame 2 more stable, and at the same time facilitating the operator to quickly replace or maintain the metal frame 1 as needed.

[0028] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, both sides of the metal frame 1 and the buffer plate 3 are slidably connected with a plurality of limit rails 303, and both sides of the metal frame 1 and the buffer plate 3 are slidably connected with a plurality of limit shafts 304 through the limit rails 303, and both sides of the metal frame 1 and the buffer plate 3 are rotatably connected with a connecting rod 305 through the limit shaft 304, and the limit shaft 304 is located at both ends of the outer wall of the connecting rod 305, and the inner center of the connecting rod 305 is rotatably connected with a limit rod 306, and the connecting rod 305 is located at the limit rod 306, and the outer wall of one end of the limit rod 306 is connected with the inner center of the connecting rod 305. The two-way threaded shaft 302 is connected through the outer wall of the two-way threaded shaft 302, and one end of the outer wall of the limit rod 306 is rotatably connected to the inner center of the connecting rod 305. A plurality of driving plates 307 are slidably connected to one side of the inner part of the metal frame 1, and the driving plates 307 are located at both ends of the outer wall of the two-way threaded shaft 302. The connecting rod 305 is located on both sides of the outer wall of the driving plate 307, and the outer wall of one side of the driving plate 307 is rotatably connected to the corresponding side of the connecting rod 305. The outer wall of one end of the two-way threaded shaft 302 is connected through the center of the outer wall of the connecting rod 305, and the inner center of the connecting rod 305 is rotatably connected to one end of the outer wall of the two-way threaded shaft 302 through a thread.

[0029] When a ship is about to dock at the dock, the device needs to adjust the distance between the mooring outer plate and the dock according to the specific needs of different ships. By starting the No. 1 motor 301 on the inner side of the metal frame 1, the output end of the No. 1 motor 301 drives the bidirectional threaded shaft 302 to rotate on the inner side of the metal frame 1, and through the threads provided on its outer wall, a plurality of driving plates 307 at both ends of its outer wall are driven to move toward the inner center of the bidirectional threaded shaft 302. By passing through and rotating the limit rod 306 at the inner center of the connecting rod 305, when the driving plate 307 drives the connecting rod 305 and the limit shaft 304 to move along the outer wall of the limit rail 303, the connecting rod 305 is tightened. The distance between the berthing outer plate and the dock can be precisely adjusted by pushing the buffer plate 3 out to the side away from the metal frame 1 to meet the docking requirements of different ships, so that the two-way threaded shaft 302, the limit rail 303 and the connecting rod 305 cooperate with each other to precisely adjust the distance between the buffer plate 3 and the dock to ensure that the ship can get proper buffer protection when docking. The adjustment process can accurately adjust the position of the buffer plate 3 to adapt to ships of different sizes and types through the forward and reverse control of the No. 1 motor 301. In addition, after the ship leaves, it can be easily reset to prepare for the docking of the next ship.

[0030] Working principle: After aligning the grooves on both sides of the outer wall of the metal frame 1 with the guide rail 206, the metal frame 1 is placed into the center of the positioning frame 2 along the outer wall of the guide rail 206, and the bottom side of the metal frame 1 pushes the positioning plate 202 to make the positioning plate 202 retreat along the outer wall of the slide rail 201 to the center of the positioning frame 2. When the groove on one side of the outer wall of the metal frame 1 moves to the outer side of the positioning plate 202, the positioning spring 203 pushes the positioning plate 202 along the outer wall of the slide rail 201 to the inner side of the metal frame 1, and makes the bottom side of the positioning plate 202 engage with the inner wall of one side of the metal frame 1. Through the engagement of the positioning plate 202 with the inner side of the metal frame 1, the metal frame 1 is fixed inside the positioning frame 2. When the device needs to be disassembled, it is only necessary to press the top plate 204 toward the inside of the positioning frame 2 so that the bottom end of one side of the top plate 204 pushes the positioning plate 202 along the outer wall of the slide rail 201 to retreat to the inside of the positioning frame 2, so that the positioning plate 202 and the metal frame 1 transition from the engaged state to the non-engaged state. When the metal frame 1 is pulled upward along the outer wall of the guide rail 206, the metal frame 1 can be taken out from the positioning frame 2. When the ship is about to dock at the dock, the device needs to adjust the distance between the berthing outer plate and the dock according to the specific needs of different ships. The output end of the No. 1 motor 301 drives the two-way threaded shaft 302 to rotate, and the threads provided on its outer wall drive the driving plate 307 to move toward the inner center of the two-way threaded shaft 302. When the driving plate 307 drives the connecting rod 305 and the limiting shaft 304 to move along the outer wall of the limiting rail 303, the buffer plate 3 is pushed out to the side away from the metal frame 1 by tightening the distance between the connecting rods 305, so that the distance between the berthing outer plate and the dock can be precisely adjusted to meet the docking needs of different ships, so that the two-way threaded shaft 302, the limiting rail 303 and the connecting rod 305 cooperate with each other, and the distance between the buffer plate 3 and the dock is precisely adjusted to ensure that the ship can get proper buffer protection when docking.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship mooring outer plate reinforcement structure, comprising a metal frame (1), characterized in that: A positioning frame (2) is slidably connected to one side of the bottom surface of the metal frame (1), and the metal frame (1) is located at the center of the positioning frame (2). A buffer plate (3) is slidably connected to the side of the outer wall of the positioning frame (2) away from the metal frame (1), and the buffer plate (3) is located at the outside of the positioning frame (2). A No. 1 motor (301) is fixedly connected to one side of the inner wall of the metal frame (1), and a bidirectional threaded shaft (302) is rotatably connected to one side of the inner wall of the metal frame (1). The outer wall of one end of the bidirectional threaded shaft (302) is fixedly connected to the output end of the No. 1 motor (301), and one end of the outer wall of the bidirectional threaded shaft (302) is rotatably connected to the inner side of the metal frame (1) through the output end of the No. 1 motor (301). One side of the outer wall of the buffer plate (3) is connected to the center of the outer wall of the metal frame (1), and one side of the outer wall of the buffer plate (3) is slidably connected to the inner side of the metal frame (1). The inner side of the buffer plate (3) is slidably connected to the inner side of the metal frame (1) through the bidirectional threaded shaft (302).

2. A ship mooring outer plate reinforcement structure according to claim 1, characterized in that: The inner center of the positioning frame (2) is simultaneously fixedly connected to a plurality of slide rails (201), and the inner center of the positioning frame (2) is slidably connected to a positioning plate (202) via the slide rails (201); one side of the outer wall of the positioning plate (202) is located on one side of the inner part of the metal frame (1), and the bottom of the outer wall of the positioning plate (202) is mutually engaged with one side of the inner part of the metal frame (1).

3. A ship mooring outer plate reinforcement structure according to claim 2, characterized in that: The outer wall of the positioning plate (202) away from the metal frame (1) is fixedly connected to a positioning spring (203), and the outer wall of one end of the positioning spring (203) is fixedly connected to the inner wall of the positioning frame (2). The top of the positioning frame (2) is slidably connected to a top plate (204), and the bottom end of one side of the top plate (204) corresponds to one side of the top surface of the positioning plate (202).

4. A ship mooring outer plate reinforcement structure according to claim 3, characterized in that: A return spring (205) is fixedly connected to the center of the bottom surface of the top plate (204), guide rails (206) are fixedly connected to both sides of the interior of the positioning frame (2), and the center of the interior of the positioning frame (2) is slidably connected to both sides of the outer wall of the metal frame (1) via the guide rails (206).

5. The ship mooring outer plate reinforcement structure according to claim 1, characterized in that: The metal frame (1) and the buffer plate (3) are both slidably connected to a plurality of limit rails (303) on both sides of the interior, and the metal frame (1) and the buffer plate (3) are both slidably connected to a plurality of limit shafts (304) via the limit rails (303), and the metal frame (1) and the buffer plate (3) are both rotatably connected to connecting rods (305) via the limit shafts (304), and the limit shafts (304) are located at both ends of the outer wall of the connecting rod (305).

6. A ship mooring outer plate reinforcement structure according to claim 5, characterized in that: The inner center of the connecting rod (305) is rotatably connected to the limiting rod (306), and the connecting rod (305) is located on the limiting rod (306). The outer wall of one end of the limiting rod (306) is connected to the inner center of the connecting rod (305) through the outer wall, and one end of the outer wall of the limiting rod (306) is rotatably connected to the inner center of the connecting rod (305).

7. A ship mooring outer plate reinforcement structure according to claim 6, characterized in that: A plurality of drive plates (307) are slidably connected to one side of the interior of the metal frame (1), and the drive plates (307) are located at both ends of the outer wall of the bidirectional threaded shaft (302). The connecting rod (305) is located at both sides of the outer wall of the drive plate (307), and the outer wall of one side of the drive plate (307) is rotatably connected to the corresponding surface of the connecting rod (305). The outer wall of one end of the bidirectional threaded shaft (302) is connected to the center of the outer wall of the connecting rod (305), and the inner center of the connecting rod (305) is rotatably connected to one end of the outer wall of the bidirectional threaded shaft (302) through a thread.

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