Waterborne platform for seawall construction

Abstract

The invention relates to the field of hydrophilic platforms, in particular to a hydrophilic platform for seawall construction, which comprises a control box, a support assembly, a platform assembly and a support buoyancy tank, the bottom surface of the control box is fixedly connected with an embedded pile body, and the control box is rotatably connected with a first rotating shaft and a second rotating shaft; and transmission gears and winding rollers are fixedly connected to the first rotating shaft and the second rotating shaft. The steel cable pull rope can drive the platform assembly to ascend and descend through the connecting block, the supporting rod in the supporting assembly can keep stable when the platform assembly ascends and descends, unnecessary shaking of the platform on the water surface is avoided, and therefore the safety of the platform and the comfort level of a user are enhanced; and the overturning assembly can drive the supporting buoyancy tank to overturn when the platform assembly ascends, so that workers can carry out comprehensive inspection and maintenance work conveniently, the labor cost is saved, the maintenance efficiency is greatly improved, and it is ensured that the platform can be kept in a good state for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of hydrophilic platforms, and in particular to a hydrophilic platform for seawall construction. Background Art

[0002] A platform that extends from land to water and makes it easier for visitors to reach the waters they want to reach is called a hydrophilic platform. Parks, lakes, rivers, wetlands, beaches and other scenic spots that rely on water resources pay great attention to the construction of hydrophilic platforms, which are mainly reflected in landscape floating bridges, water trails, and viewing corridors. They are used to view blooming flowers in the pool, walk on the sparkling water, play with lively fish in the water, appreciate the beautiful scenery along the coast, etc. Usually, laying antiseptic wood on the floating platform can complete a practical and beautiful hydrophilic platform.

[0003] A Chinese patent with application number 201110443085.7 discloses a hydrophilic platform that can rise and fall with the water level. It uses PE floats and can rise and fall freely according to the changes in the water level, satisfying people's needs for water play in any season. It uses anti-corrosion sleepers, anti-corrosion wooden boards, stainless steel wires and stainless steel threaded nails, so it will not be submerged in water and cause rot, and its service life is longer than that of ordinary hydrophilic platforms. It uses 8 cm long stainless steel threaded nails to screw several 5 cm thick anti-corrosion sleepers to the upper side of the 5 cm thick anti-corrosion wooden board, which is suitable for rivers and lakes with multiple water levels, and is simple and beautiful.

[0004] Since seawater in the seawall environment is corrosive to a certain extent, maintenance personnel usually spray paint on the buoys to enhance their corrosion resistance. In the above solution, the buoys are set under the platform. It is difficult to paint and maintain the buoys after the platform is put into use, and the platform is only supported by the buoys. When people move on the platform, the hydrophilic platform will rise and fall on the water surface, and its stability is poor.

[0005] Therefore, the present invention provides a hydrophilic platform for seawall construction to solve the above problems. Summary of the invention

[0006] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a hydrophilic platform for seawall construction to solve the problem that it is difficult to paint and maintain the buoys of the above-mentioned platform after it is put into use, and the platform is only supported by the buoys. When people move on the platform, the hydrophilic platform will rise and fall on the water surface and have poor stability.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A hydrophilic platform for seawall construction comprises a control box, a support assembly, a platform assembly and a supporting pontoon, wherein the bottom surface of the control box is fixedly connected to an embedded pile body, the control box is rotatably connected to a first rotating shaft and a second rotating shaft, the first rotating shaft and the second rotating shaft are both fixedly connected to a transmission gear and a winding roller, the two transmission gears are meshed with each other, a guide roller is installed in the control box, a vertical pole is fixedly connected to the control box, the top of the vertical pole passes through the control box and is installed with a transfer roller, a steel cable rope is wound around the winding roller, and one end of the steel cable rope passes through the guide roller and the transfer roller in sequence and is fixedly connected to a connecting block, and the connecting block is installed on the platform assembly.

[0009] The support assembly includes a storage tube, the bottom end of which is fixedly connected to the control box, a storage cavity is provided on the storage tube, a support rod is slidably connected in the storage cavity, and the top end of the support rod is fixedly connected to the platform assembly.

[0010] The platform assembly is provided with a flipping assembly for flipping the supporting pontoon during the lifting and lowering of the platform assembly, the flipping assembly includes a support shaft and a transmission shaft, one end of the support shaft is rotatably connected to the platform assembly, the other end of the support shaft is fixedly connected to the supporting pontoon, one end of the transmission shaft is rotatably connected to the platform assembly, the other end of the transmission shaft is fixedly connected to a linkage gear, a fixed rod is fixedly connected to the control box, a first rack is fixedly connected to the fixed rod, and the first rack is meshed with the linkage gear, pulleys are fixedly connected to the support shaft and the transmission shaft, and the two pulleys are connected by belt transmission.

[0011] A driving component for providing a rotational driving force to the first rotating shaft is disposed on one side of the control box, and a limiting component for limiting the position of the control box after movement is disposed on the control box.

[0012] Preferably, the platform assembly comprises a platform frame, on which connecting floors arranged at equal intervals are mounted.

[0013] Preferably, a guardrail is fixedly connected to the platform frame, and a ramp is hingedly connected to one side of the platform frame.

[0014] Preferably, the driving assembly includes a fixed frame, a motor is fixedly connected to the fixed frame, an output shaft of the motor is fixedly connected to a driving shaft, a worm is fixedly connected to the driving shaft, a worm wheel is fixedly connected to the first rotating shaft, and the worm wheel is meshed with the worm wheel.

[0015] Preferably, a concrete pile is fixedly connected to the bottom surface of the fixing frame, a protective shell is fixedly connected to the fixing frame, the motor is located in the protective shell, and the middle section of the drive shaft is rotatably connected to the protective shell.

[0016] Preferably, the limit assembly includes two L-shaped rods and a bidirectional cylinder, the bidirectional cylinder is fixedly connected to a fixed frame, the two telescopic ends of the bidirectional cylinder are respectively fixedly connected to the two L-shaped rods, the side surfaces of the two L-shaped rods close to each other are fixedly connected with a second rack, the driving shaft is fixedly connected with a limit gear, and one end of the second rack is inserted into the second rack.

[0017] Preferably, both side surfaces of the fixing frame are fixedly connected with guide rods, and the two L-shaped rods are slidably connected to the two guide rods respectively.

[0018] Preferably, the control box is provided with two guide grooves, the two L-shaped rods are respectively slidably connected in the two guide grooves, the L-shaped rod is fixedly connected with a connecting plate, the connecting plate is fixedly connected with an insertion rod, the support rod is provided with a socket, the storage tube is provided with a through hole matching the socket, and one end of the insertion rod away from the L-shaped rod passes through the through hole and is inserted into the socket.

[0019] Preferably, a limiting frame is fixedly connected to the storage tube, and the connecting plate is slidably connected to the limiting frame.

[0020] The beneficial effects of the present invention are:

[0021] 1. Through the coordination of the steel cable pull system, the support assembly and the flip assembly, that is, after the driving assembly provides power to the first rotating shaft and the second rotating shaft, the winding roller drives the steel cable pull rope to drive the platform assembly to move up and down through the connecting block through the guide roller and the transfer roller. The support rod in the support assembly can keep the platform assembly stable when it is raised and lowered, avoiding unnecessary shaking of the platform on the water surface, thereby enhancing the safety of the platform and the comfort of the user. The flip assembly will drive the supporting pontoon to flip when the platform assembly moves upward, so that the staff can conduct comprehensive inspection and maintenance work. This method not only saves labor costs, but also greatly improves maintenance efficiency, ensuring that the platform can maintain a good condition for a long time.

[0022] 2. By setting up limit components, that is, using L-shaped rods, two-way cylinders, racks, gears and other structures, the platform components can be firmly locked after being adjusted to the required height to prevent accidental movement of the platform due to external factors, thereby significantly improving the overall stability of the platform and ensuring the safety of tourists. When maintaining the supporting pontoon, the platform can be fixed at a certain height through the limit components, making it easier to pull the supporting pontoon out of the water for maintenance work such as flipping and painting, simplifying the entire maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a stereogram of the present invention.

[0024] Figure 2It is a top view of the present invention.

[0025] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure in the middle.

[0026] Figure 4 The figure is a schematic diagram of the installation of the present invention on the seawall.

[0027] Figure 5 It is a schematic diagram of the overall structure of the drive assembly of the present invention.

[0028] Figure 6 The cross-sectional view of the present invention Figure 1 .

[0029] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at B in the figure.

[0030] Figure 8 The cross-sectional view of the present invention Figure 2 .

[0031] Fig. 9 For the present invention Figure 8 A magnified schematic diagram of the structure at center C.

[0032] In the figure: 1, control box; 2, embedded pile body; 3, steel cable pull rope; 4, first rotating shaft; 5, support assembly; 6, flip assembly; 7, limit assembly; 8, drive assembly; 9, platform assembly; 10, guide roller; 11, vertical pole; 12, transfer roller; 13, connecting block; 14, support pontoon; 15, transmission gear; 16, winding roller; 17, guide groove; 18, second rotating shaft; 5, support assembly; 51, storage tube; 52, support rod; 53, storage cavity; 6, flip assembly; 61, support shaft; 62, transmission shaft; 63, connecting rod moving gear; 64, pulley; 65, fixed rod; 66, first rack; 7, limit assembly; 71, L-shaped rod; 72, guide rod; 73, two-way cylinder; 74, second rack; 75, limit gear; 76, limit frame; 77, connecting plate; 78, plug rod; 79, socket; 8, driving assembly; 81, fixed frame; 82, motor; 83, protective shell; 84, worm; 85, worm wheel; 86, concrete pile; 87, driving shaft; 9, platform assembly; 91, platform frame; 92, connecting floor; 93, guardrail; 94, slope board. DETAILED DESCRIPTION

[0033] The following will refer to the attached Figures 1 to 9 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0034] A hydrophilic platform for seawall construction, such as Figure 1 , Figure 2 , Figure 4 , Figure 6 and Figure 8 As shown, it includes a control box 1, a support assembly 5, a platform assembly 9 and a support pontoon 14. The bottom surface of the control box 1 is fixedly connected with a pre-buried pile body 2. The pre-buried pile body 2 is fixed to the bottom of the pond by a pile driver. The control box 1 can be fixed on the pre-buried pile body 2 by welding or the like. The control box 1 is rotatably connected with a first rotating shaft 4 and a second rotating shaft 18. The first rotating shaft 4 and the second rotating shaft 18 are symmetrically designed. A transmission gear 15 and a winding roller 16 are fixedly connected to the first rotating shaft 4 and the second rotating shaft 18. The two transmission gears 15 are meshed with each other. Since the first rotating shaft 4 and the second rotating shaft 18 are transmitted through the two transmission gears 15, the first rotating shaft 4 and the second rotating shaft 18 are connected. The second rotating shaft 18 rotates in the opposite direction when rotating. A guide roller 10 is installed in the control box 1. A vertical pole 11 is fixedly connected to the control box 1. The top of the vertical pole 11 passes through the control box 1 and is installed with a transfer roller 12. A steel cable rope 3 is wound on the winding roller 16, and one end of the steel cable rope 3 passes through the guide roller 10 and the transfer roller 12 in sequence and is fixedly connected with a connecting block 13, and the connecting block 13 is installed on the platform assembly 9. The steel cable rope 3 can be guided by the guide roller 10 and the transfer roller 12. When the first rotating shaft 4 drives the winding roller 16 to rotate, the steel cable rope 3 is wound or loosened on the winding roller 16 to complete the lifting and lowering movement of the platform assembly 9 driven by the connecting block 13.

[0035] like Figure 8 and Fig. 9 As shown, the support assembly 5 includes a storage tube 51, the bottom end of which is fixedly connected to the control box 1, and a storage cavity 53 is provided on the storage tube 51. A support rod 52 is slidably connected in the storage cavity 53, and the top end of the support rod 52 is fixedly connected to the platform assembly 9. When the platform assembly 9 is raised or lowered, the platform assembly 9 will drive the support rod 52 to slide in the storage cavity 53, thereby guiding the movement of the platform assembly 9 to prevent the platform assembly 9 from shaking left and right.

[0036] like Figure 1 , Figure 3 and Figure 4As shown, the platform assembly 9 is provided with a flip assembly 6 for flipping the supporting pontoon 14 during the lifting and lowering process of the platform assembly 9. The flip assembly 6 includes a support shaft 61 and a transmission shaft 62. One end of the support shaft 61 is rotatably connected to the platform assembly 9, and the other end of the support shaft 61 is fixedly connected to the supporting pontoon 14. One end of the transmission shaft 62 is rotatably connected to the platform assembly 9, and the other end of the transmission shaft 62 is fixedly connected to a linkage gear 63. A fixing rod 65 is fixedly connected to the control box 1, and a first rack 66 is fixedly connected to the fixing rod 65, and the first rack 66 is meshed with the linkage gear 63. Pulleys 64 are fixedly connected to both the support shaft 61 and the transmission shaft 62, and the two pulleys 64 are connected by belt transmission.

[0037] When it is necessary to perform painting maintenance on the supporting pontoon 14, the steel cable pull rope 3 can be wound up by the winding roller 16 to drive the platform assembly 9 to move upward, that is, the platform assembly 9 will move above the control box 1 and pull the supporting pontoon 14 out of the water. When the platform assembly 9 moves, the linkage gear 63 will engage with the first rack 66 on the fixed rod 65, so that the transmission shaft 62 rotates, and under the action of the pulley 64 and the belt, the support shaft 61 rotates following the transmission shaft 62, so that the bottom end of the supporting pontoon 14 is flipped after being moved out of the water, which not only allows the supporting pontoon 14 to be pulled out of the water for convenient painting maintenance, but also allows the supporting pontoon 14 to rotate while being moved out, so that workers can perform comprehensive maintenance on the supporting pontoon 14.

[0038] like Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, the platform assembly 9 includes a platform frame 91, on which are installed connecting floors 92 arranged at equal intervals, a guardrail 93 is fixedly connected to the platform frame 91, a slope 94 is hinged on one side of the platform frame 91, and the top of the support rod 52 is fixed to the bottom of the platform frame 91. The platform frame 91, the connecting floor 92, the guardrail 93 and the slope 94 are all made of anti-corrosion materials and have a long service life in the seawall environment. One end of the slope 94 will rest on the seawall slope protection, and the slope 94 will rotate when the platform frame 91 is raised and lowered to form a slope to facilitate people to enter and exit the connecting floor 92, and anti-slip patterns can also be provided on the slope 94 to prevent people from slipping on the slope 94.

[0039] like Figure 4 and Figure 5As shown, a driving assembly 8 for providing a rotational driving force to the first rotating shaft 4 is provided on one side of the control box 1, and the driving assembly 8 includes a fixed frame 81, to which a motor 82 is fixedly connected, and the output shaft of the motor 82 is fixedly connected to a driving shaft 87, and the driving shaft 87 is fixedly connected to a worm 84, and the first rotating shaft 4 is fixedly connected to a worm wheel 85, and the worm wheel 85 is meshed with the worm 84, and the fixed frame 81 is installed on the seawall slope protection, and after the output shaft of the motor 82 drives the driving shaft 87 to rotate, it will drive the first rotating shaft 4 to rotate clockwise or counterclockwise through the meshing of the worm 84 and the worm wheel 85.

[0040] like Figure 4 and Figure 5 As shown, a concrete pile 86 is fixedly connected to the bottom surface of the fixing frame 81, a protective shell 83 is fixedly connected to the fixing frame 81, the motor 82 is located in the protective shell 83, the middle section of the driving shaft 87 is rotatably connected to the protective shell 83, and the concrete pile 86 needs to be pre-buried in the ground to improve the stability of the fixing frame 81. The protective shell 83 can shield the motor 82 and thereby protect the motor 82.

[0041] like Figure 5 , Figure 6 and Figure 7 As shown, the control box 1 is provided with a limit assembly 7 for limiting the control box 1 after movement. The limit assembly 7 includes two L-shaped rods 71 ​​and a two-way cylinder 73. The two-way cylinder 73 is fixedly connected to the fixed frame 81. The two telescopic ends of the two-way cylinder 73 are respectively fixedly connected to the two L-shaped rods 71. The side of the two L-shaped rods 71 ​​close to each other is fixedly connected with a second rack 74. A limit gear 75 is fixedly connected to the drive shaft 87. One end of the second rack 74 is inserted into the second rack 74. Guide rods 72 are fixedly connected to the two side surfaces of the fixed frame 81. The two L-shaped rods 71 ​​are respectively slidably connected to the two guide rods 72. After the height of the platform assembly 9 is adjusted, the two L-shaped rods 71 ​​can be moved closer to each other on the guide rods 72 through the telescopic ends of the two-way cylinder 73, and the second racks 74 on the two L-shaped rods 71 ​​are inserted into the adjacent teeth on the limit gear 75, and then the drive shaft 87 is rotationally limited by the limit gear 75.

[0042] like Figure 1 , Figure 6 , Figure 8 and Fig. 9As shown, the control box 1 is provided with two guide grooves 17, two L-shaped rods 71 ​​are slidably connected to the two guide grooves 17, the L-shaped rod 71 is fixedly connected with a connecting plate 77, the connecting plate 77 is fixedly connected with an insert rod 78, the support rod 52 is provided with a plug hole 79, the storage tube 51 is provided with a through hole matching the plug hole 79, and the end of the plug rod 78 away from the L-shaped rod 71 passes through the through hole and is inserted into the plug hole 79, the storage tube 51 is fixedly connected with a limiting frame 76, and the connection The plate 77 is slidably connected to the limiting frame 76. When the platform assembly 9 needs to be moved upward, the L-shaped rod 71 can be driven to move by the two-way cylinder 73, and the L-shaped rod 71 can drive the insertion rod 78 to be pulled out of the socket 79 through the connecting plate 77, thereby releasing the limit on the support rod 52. After the height adjustment of the platform assembly 9 is completed, the L-shaped rod 71 drives the insertion rod 78 to be inserted into the socket 79 through the connecting plate 77 to limit the support rod 52, thereby improving the stability of the platform assembly 9.

[0043] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A hydrophilic platform for seawall construction, characterized in that: The invention comprises a control box (1), a support assembly (5), a platform assembly (9) and a support pontoon (14), wherein the bottom surface of the control box (1) is fixedly connected to a pre-buried pile body (2), the control box (1) is rotatably connected to a first rotating shaft (4) and a second rotating shaft (18), the first rotating shaft (4) and the second rotating shaft (18) are both fixedly connected to a transmission gear (15) and a winding roller (16), the two transmission gears (15) are meshed with each other, a guide roller (10) is installed in the control box (1), a vertical pole (11) is fixedly connected to the control box (1), the top end of the vertical pole (11) passes through the control box (1) and is installed with a transfer roller (12), a steel cable rope (3) is wound around the winding roller (16), and one end of the steel cable rope (3) passes through the guide roller (10) and the transfer roller (12) in sequence and is fixedly connected to a connection block (13), and the connection block (13) is installed on the platform assembly (9); The support assembly (5) comprises a storage tube (51), the bottom end of the storage tube (51) is fixedly connected to the control box (1), a storage cavity (53) is provided on the storage tube (51), a support rod (52) is slidably connected in the storage cavity (53), and the top end of the support rod (52) is fixedly connected to the platform assembly (9); The platform assembly (9) is provided with a flip assembly (6) for flipping the supporting pontoon (14) during the lifting process of the platform assembly (9), and the flip assembly (6) comprises a support shaft (61) and a transmission shaft (62), one end of the support shaft (61) is rotatably connected to the platform assembly (9), the other end of the support shaft (61) is fixedly connected to the supporting pontoon (14), one end of the transmission shaft (62) is rotatably connected to the platform assembly (9), the other end of the transmission shaft (62) is fixedly connected to a linkage gear (63), a fixed rod (65) is fixedly connected to the control box (1), a first rack (66) is fixedly connected to the fixed rod (65), and the first rack (66) is meshed with the linkage gear (63), and pulleys (64) are fixedly connected to both the support shaft (61) and the transmission shaft (62), and the two pulleys (64) are connected by belt transmission; A driving component (8) for providing a rotational driving force to the first rotating shaft (4) is provided on one side of the control box (1), and a limiting component (7) for limiting the position of the control box (1) after movement is provided on the control box (1).

2. A hydrophilic platform for seawall construction according to claim 1, characterized in that: The platform assembly (9) comprises a platform frame (91), on which connecting floors (92) arranged at equal intervals are mounted.

3. A hydrophilic platform for seawall construction according to claim 2, characterized in that: A guardrail (93) is fixedly connected to the platform frame (91), and a ramp (94) is hingedly connected to one side of the platform frame (91).

4. A hydrophilic platform for seawall construction according to claim 1, characterized in that: The driving assembly (8) comprises a fixed frame (81), a motor (82) is fixedly connected to the fixed frame (81), an output shaft of the motor (82) is fixedly connected to a driving shaft (87), a worm (84) is fixedly connected to the driving shaft (87), a worm wheel (85) is fixedly connected to the first rotating shaft (4), and the worm wheel (85) is meshed with the worm wheel (84).

5. A hydrophilic platform for seawall construction according to claim 4, characterized in that: The bottom surface of the fixing frame (81) is fixedly connected to a concrete pile (86), the fixing frame (81) is fixedly connected to a protective shell (83), the motor (82) is located in the protective shell (83), and the middle section of the driving shaft (87) is rotatably connected to the protective shell (83).

6. A hydrophilic platform for seawall construction according to claim 4, characterized in that: The limit assembly (7) comprises two L-shaped rods (71) and a bidirectional cylinder (73); the bidirectional cylinder (73) is fixedly connected to a fixed frame (81); two telescopic ends of the bidirectional cylinder (73) are respectively fixedly connected to the two L-shaped rods (71); a second rack (74) is fixedly connected to a side surface of the two L-shaped rods (71) close to each other; a limit gear (75) is fixedly connected to the driving shaft (87); and one end of the second rack (74) is plugged into the second rack (74).

7. A hydrophilic platform for seawall construction according to claim 6, characterized in that: Both side surfaces of the fixing frame (81) are fixedly connected with guide rods (72), and the two L-shaped rods (71) are slidably connected to the two guide rods (72) respectively.

8. A hydrophilic platform for seawall construction according to claim 6, characterized in that: The control box (1) is provided with two guide grooves (17), the two L-shaped rods (71) are slidably connected in the two guide grooves (17) respectively, the L-shaped rod (71) is fixedly connected with a connecting plate (77), the connecting plate (77) is fixedly connected with an inserting rod (78), the support rod (52) is provided with an inserting hole (79), the storage tube (51) is provided with a through hole matching the inserting hole (79), and one end of the inserting rod (78) away from the L-shaped rod (71) passes through the through hole and is inserted into the inserting hole (79).

9. A hydrophilic platform for seawall construction according to claim 8, characterized in that: The storage tube (51) is fixedly connected to a limiting frame (76), and the connecting plate (77) is slidably connected to the limiting frame (76).

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