Driving mechanism suitable for shallow foundation pit lifting platform

Abstract

The invention relates to the technical field of lifting equipment, and discloses a driving mechanism suitable for a shallow foundation pit lifting platform. The mechanism comprises a hydraulic cylinder thrust unit, a diagonal bridging stabilizing mechanism and a compression energy storage spring. The hydraulic cylinder thrust units and the cross bridging stabilizing mechanisms are arranged in pairs, the ends of piston rods of the hydraulic cylinder thrust units and the cross bridging stabilizing mechanisms are coaxially hinged to the lifting platform through hinge seats, horizontal component force of hydraulic cylinders is converted into structural internal force, and the horizontal component force counteracts the structural internal force. And the compression energy storage spring is arranged near a hinge point of the cross bridging stabilizing mechanism. The end of a piston rod of the hydraulic cylinder is coaxially hinged to the cross bridging, the inclined hydraulic cylinder is used for directly pushing the cross bridging, and large-stroke lifting of the lifting platform in the shallow foundation pit is achieved through the cross bridging structure. The initial thrust of the inclined hydraulic cylinder is reduced through the compression energy storage spring, and the defects that the horizontal component force of the inclined hydraulic cylinder is seriously amplified and the vertical component force is small when the mechanism is in a contraction state are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting equipment, in particular to a driving mechanism suitable for a shallow foundation pit lifting platform. BACKGROUND

[0002] The conventional lifting platform driving mechanism usually adopts a structure form of directly pushing the platform by a hydraulic cylinder, but in the case of setting the lifting platform in a shallow foundation pit, this structure faces many technical problems: a great initial thrust needs to be provided when the initial working angle of the hydraulic cylinder is too small, resulting in excessive installed power of the hydraulic system, high energy consumption, and doubled cost; the horizontal component force generated by the hydraulic cylinder needs to be balanced by an additional anti-horizontal force mechanism, increasing the structural complexity and the space occupation of the foundation pit; there is a lack of effective self-stabilizing guiding mechanism during the lifting process of the platform, which is easily affected by the disturbance of the carried object and tilted and unstable; at the same time, the conventional driving mechanism is difficult to balance the requirements of low space occupation and high stability, and often needs a deeper foundation pit or additional guiding device, which restricts its application effect in the shallow foundation pit scene. SUMMARY

[0003] In order to solve the above technical problems, the embodiment of the present application provides a driving mechanism suitable for a shallow foundation pit lifting platform.

[0004] The present application provides a driving mechanism suitable for a shallow foundation pit lifting platform, comprising: a hydraulic cylinder thrust unit, a scissors stabilizing mechanism and a compression energy storage spring; The hydraulic cylinder thrust unit and the scissors stabilizing mechanism are symmetrically arranged below the lifting platform in pairs, and the piston rod end of the hydraulic cylinder thrust unit and the scissors stabilizing mechanism are coaxially hinged to the lifting platform through a hinge seat; The compression energy storage spring is arranged near the hinge point of the scissors stabilizing mechanism, and is used to provide auxiliary support when the scissors stabilizing mechanism is in a contracted state.

[0005] Optionally, the hydraulic cylinder thrust unit and the scissors stabilizing mechanism are symmetrically arranged below the lifting platform in pairs, and the cylinder tail of the hydraulic cylinder thrust unit is hinged on a foundation pit pre-buried base; The scissors stabilizing mechanism comprises a first scissors arm and a second scissors arm, one end of the first scissors arm is coaxially hinged with the piston rod end of the hydraulic cylinder thrust unit through the hinge seat, and the other end rolls along the foundation pit guide rail through a roller; One end of the second scissors arm is hinged on the foundation pit pre-buried base, and the other end rolls along the platform guide rail arranged at the bottom of the lifting platform through the roller.

[0006] Optionally, the compression energy storage spring is arranged in multiple groups, each near a respective hinging point of the scissors stabilizing mechanism. The compression energy storage spring is deformed under pressure when the scissors stabilizing mechanism is in the contracted state, for absorbing and storing mechanical energy and providing auxiliary vertical upward thrust.

[0007] Optionally, the compression energy storage spring is deformed under pressure and jointly bears the supporting action with the hydraulic cylinder thrust unit when the scissors stabilizing mechanism is in the contracted state. When the scissors stabilizing mechanism is opened to a predetermined height, the compression energy storage spring is out of contact and enters a free state, at which time the continued lifting of the lifting platform is independently driven by the hydraulic cylinder thrust unit.

[0008] Optionally, the kinematic pair part of the hydraulic cylinder thrust unit is provided with a sealing structure for preventing water intrusion. The hinging part of the scissors stabilizing mechanism is provided with a corrosion-resistant treatment layer for resisting water corrosion. The surface of the compression energy storage spring is provided with a corrosion-resistant coating for improving the underwater service life.

[0009] The driving mechanism provided by the present application has the following beneficial effects: The driving mechanism provided by the present application adopts a symmetrical arrangement of the hydraulic cylinder thrust unit and the scissors stabilizing mechanism, and the horizontal components generated during work are mutually offset inside the platform, so that an anti-horizontal force mechanism does not need to be additionally arranged, thereby simplifying the structure and improving the operation stability. The coaxial hinging design of the hydraulic cylinder thrust unit and the scissors stabilizing mechanism enables the hydraulic thrust to directly act on the lifting platform. The compression energy storage spring provides auxiliary support when the scissors are contracted, thereby significantly reducing the initial thrust required by the hydraulic cylinder. Meanwhile, the hydraulic cylinder thrust unit can have a smaller included angle with the horizontal plane when the lifting platform is contracted, and the lifting platform can be contracted to a smaller thickness, thereby being more suitable for shallow foundation pits.

[0010] The scissors stabilizing mechanism naturally forms geometric constraints during lifting by the cooperation of the scissors arms and the pulley guide rails, thereby providing a continuous and stable guiding action for the platform and avoiding the risk of platform tilting or jamming. The self-stabilizing property of the mechanism enables it to effectively resist external disturbances such as object sway and disturbance, thereby ensuring smooth and reliable lifting.

[0011] The introduction of the compression energy storage spring significantly reduces the initial thrust required by the hydraulic cylinder, and the application of waterproof and corrosion-resistant measures significantly enhances the durability of the mechanism in a water-immersed environment, thereby prolonging the service life and reducing the system maintenance cost. The application of the scissors stabilizing mechanism significantly improves the stability of system operation. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A structure side view of a driving mechanism suitable for a shallow foundation lifting platform is provided for an embodiment of the present application; Figure 2 A structure top view of a driving mechanism suitable for a shallow foundation lifting platform is provided for an embodiment of the present application; Reference signs: 1, hydraulic cylinder thrust unit; 2, scissor stabilizing mechanism; 21, first scissor arm; 22, second scissor arm; 3, compression energy storage spring; 41, hinged seat; 42, roller; 5, lifting platform; 6, foundation embedded base; 71, foundation guide rail; 72, platform guide rail; 3, compression energy storage spring. DETAILED DESCRIPTION

[0013] In order to make the purposes, technical solutions and advantages of the present application clearer, the following further describes specific embodiments of the present application in conjunction with the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts related to the present application are shown in the drawings, but not all contents. Before discussing the example embodiments in more detail, it should be mentioned that some example embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe each operation (or step) as a sequential process, many of the operations can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0014] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents a "or" relationship between the associated objects before and after.

[0015] The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0016] Figure 1 A driving mechanism structure front view suitable for shallow foundation pit lifting platform provided by the embodiment of the present application, Figure 1 (a) in the figure is the low position of the platform, Figure 1 (b) in the figure is the platform rising state, Figure 1 (c) in the figure is the high position of the platform, at this time the spring is in a free state, and is out of contact with the lifting platform. Figure 2 A driving mechanism structure plan view suitable for shallow foundation pit lifting platform provided by the embodiment of the present application. The structure comprises: Hydraulic cylinder thrust unit 1, scissor stabilizing mechanism 2 and compression energy storage spring 3; The hydraulic cylinder thrust unit 1 and the scissor stabilizing mechanism 2 are symmetrically arranged, and the horizontal components generated during work are mutually offset inside the lifting platform 5, so that an additional horizontal force resisting mechanism is not needed, which simplifies the structure and improves the operation stability. The piston rod end of the hydraulic cylinder thrust unit 1 is coaxially hinged to the lifting platform 5 through the hinge seat 41 of the scissor stabilizing mechanism 2. This connection mode ensures the directness and effectiveness of power transmission.

[0017] The compression energy storage spring 3 is arranged near the hinge point of the scissor stabilizing mechanism 2, and is used to provide auxiliary support when the scissor stabilizing mechanism 2 is in a contracted state. When the scissor stabilizing mechanism 2 is in a contracted state, the compression energy storage spring 3 is compressed and stores mechanical energy, which directly provides vertical auxiliary support force for the lifting platform 5. This design reasonably distributes the load of the entire driving system, and significantly reduces the initial thrust required by the hydraulic cylinder thrust unit 1. At the same time, the lifting platform 5 can be lowered to a lower height, and the angle between the hydraulic cylinder thrust unit 1 and the horizontal direction is also smaller.

[0018] In the specific implementation process, the hydraulic cylinder thrust unit 1 is installed at a small angle with the ground. This small angle arrangement effectively reduces the overall height of the driving mechanism, and adapts to the space limitation of the shallow foundation pit. When the hydraulic cylinder thrust unit 1 starts to work, the extension and retraction movement of the piston rod is directly transmitted to the scissor stabilizing mechanism 2 and the lifting platform 5 through the hinge seat 41, which drives the lifting platform 5 to make vertical movement. At the same time, the scissor stabilizing mechanism 2 naturally forms a stable triangular support system in the movement process through its unique geometric structure, which provides continuous guidance and stability for the lifting platform 5. During the movement process, the horizontal components of the symmetrically arranged hydraulic cylinder thrust units 1 are mutually offset inside the lifting platform 5.

[0019] The working state of the compression storage spring 3 is closely related to the position of the scissor brace stabilizing mechanism 2. When the platform is in a low position, the scissor brace stabilizing mechanism 2 is in a contracted state, and the compression storage spring 3 is fully compressed and stores a large amount of elastic potential energy. As the platform begins to rise, the compression storage spring 3 gradually releases the stored energy, providing auxiliary thrust for the rising process. This energy storage and release mechanism effectively reduces the workload of the hydraulic system and significantly reduces the initial thrust of the hydraulic cylinder thrust unit 1.

[0020] The unique feature of this drive mechanism lies in its integration of hydraulic drive, mechanical stabilization, and elastic assistance into a single unit. Symmetrically arranged hydraulic cylinder thrust units 1 provide the main power, scissor brace stabilization mechanism 2 ensures motion stability, and compression energy storage springs 3 provide energy regulation and auxiliary support. These three components work together to form a highly efficient and stable drive system. This integrated design not only simplifies the overall structure but also improves the system's reliability and service life. Therefore, the drive mechanism of the lifting platform provided by this invention is more suitable for transporting items in shallow pit environments.

[0021] Continue reading Figure 1 and Figure 2 In some implementation methods, The hydraulic cylinder thrust unit 1 and the scissor brace stabilizing mechanism 2 are symmetrically arranged in pairs below the lifting platform 5. The tail of the cylinder of the hydraulic cylinder thrust unit 1 is hinged to the pre-embedded base 6 in the pit. The scissor brace stabilizing mechanism 2 includes a first scissor arm 21 and a second scissor arm 22. One end of the first scissor arm 21 is coaxially hinged to the piston rod end of the hydraulic cylinder thrust unit 1 through a hinge seat 41, and the other end rolls along the pit guide rail 71 through a roller 42. One end of the second scissor arm 22 is hinged to the pre-embedded base 6 in the foundation pit, and the other end rolls along the platform guide rail 72 set at the bottom of the lifting platform 5 via roller 42.

[0022] The hydraulic cylinder thrust units 1 are arranged symmetrically in pairs below the lifting platform 5. This symmetrical layout allows the horizontal components of the hydraulic cylinder thrust units 1 to cancel each other out during operation. The tail of the cylinder body of the hydraulic cylinder thrust unit 1 is connected to the pre-embedded base 6 in the pit by a hinge.

[0023] The scissor brace stabilizing mechanism 2 includes a first scissor arm 21 and a second scissor arm 22. These two sets of scissor arms are cross-hinged to form a stable truss structure. One end of the first scissor arm 21 is coaxially hinged to the piston rod end of the hydraulic cylinder thrust unit 1 through a hinge seat 41. This connection method ensures that the hydraulic thrust can be directly transmitted to the scissor brace stabilizing mechanism 2. The first scissor arm 21 and the hydraulic cylinder thrust unit 1 form a stable triangular support structure. The other end of the first scissor arm 21 forms a rolling engagement with the pit guide rail 71 through a roller 42.

[0024] The pit guide rail 71 is horizontally fixed inside the pit, and the load is evenly distributed through multiple mounting supports. The platform guide rail 72 is horizontally installed at the bottom of the lifting platform 5, forming a parallel guide rail system with the pit guide rail 71. During the movement of the first scissor arm 21 and the second scissor arm 22, the roller 42 rolls horizontally along the pit guide rail 71 and the platform guide rail 72. This movement mode ensures that the scissor brace stabilizing mechanism 2 maintains a stable geometric shape during the opening and closing process, providing reliable support and guidance for the lifting platform 5.

[0025] The symmetrical arrangement of the hydraulic cylinder thrust unit 1 has been optimized. The installation position and angle of each hydraulic cylinder thrust unit 1 ensure that the horizontal component force generated during the lifting process can be balanced inside the platform, thereby improving the stability and service life of the overall structure.

[0026] Continue reading Figure 1 and Figure 2 In some implementation methods, The compression energy storage spring 3 is set in multiple groups and arranged near each hinge point of the scissor brace stabilizing mechanism 2. The compression storage spring 3 is deformed under pressure when the scissor brace stabilizing mechanism 2 is in the contracted state, and is used to absorb and store mechanical energy and provide vertical upward auxiliary thrust.

[0027] The compression energy storage spring 3 is configured as multiple spring units, each of which is independently installed near each hinge point of the scissor brace stabilizing mechanism 2. A complete spring support device is provided near each hinge point. The spring units can be fixedly installed on the hinge point base by means of spring seats. The spring seats are made of high-strength steel plates and have sufficient rigidity and strength to withstand the reaction force of the spring.

[0028] The installation height of the compression storage spring 3 ensures that the spring reaches the predetermined compression amount when the scissor brace stabilizing mechanism 2 is in the fully retracted state. The pre-compression amount of the spring is adjusted by adjusting shims to ensure that the height of all spring units in the retracted state is consistent. When the scissor brace stabilizing mechanism 2 begins to unfold, the compression storage spring 3 gradually releases the stored mechanical energy as the lifting platform 5 rises, providing a smooth auxiliary thrust for the vertical direction of the lifting platform 5.

[0029] When the scissor brace stabilizing mechanism 2 is in the retracted state, the compressed energy storage spring 3 undergoes elastic deformation under the pressure of the hinge point, storing mechanical energy inside the spring. During this process, the spring's reaction force is transmitted to the entire scissor brace stabilizing mechanism 2 through the hinge point, providing additional support for the lifting platform 5. As the lifting platform 5 begins to rise, the scissor brace stabilizing mechanism 2 gradually unfolds, the compression of the compressed energy storage spring 3 gradually decreases, and the stored mechanical energy is slowly released, transforming into auxiliary power to propel the platform upward.

[0030] The working state of the spring unit is closely related to the movement position of the scissor brace stabilizing mechanism 2. Throughout the entire stroke of the lifting platform 5, the auxiliary thrust of the compressed energy storage spring 3 exhibits a pattern of first increasing and then decreasing, with the maximum auxiliary thrust occurring at the initial stage of the stroke. This thrust characteristic precisely compensates for the thrust variation of the hydraulic cylinder thrust unit 1 in different stroke segments, making the output thrust of the entire drive system more stable and balanced.

[0031] Continue reading Figure 1 In some implementation methods, When the scissor brace stabilizing mechanism 2 is in the retracted state, the compressed energy storage spring 3 is deformed by pressure and together with the hydraulic cylinder thrust unit 1, it bears the supporting role. When the scissor brace stabilizing mechanism 2 opens to the predetermined height, the compressed energy storage spring 3 disengages from contact and enters a free state. At this time, the continued lifting and lowering of the lifting platform 5 is independently driven by the hydraulic cylinder thrust unit 1.

[0032] When the scissor brace stabilizing mechanism 2 is in its fully retracted state, the compression storage spring 3 is in its maximum compressed state. At this time, the spring's reaction force reaches its peak, and together with the hydraulic cylinder thrust unit 1, it bears the entire load of the lifting platform 5. This method significantly reduces the initial thrust requirement of the hydraulic cylinder thrust unit 1, making the system start-up smoother.

[0033] In the initial stage of the lifting platform 5's ascent, the scissor brace stabilizing mechanism 2 remains in a contracted state, and the compressed energy storage spring 3 maintains a pre-compressed state. As the piston rod of the hydraulic cylinder thrust unit 1 extends, the scissor brace stabilizing mechanism 2 slowly unfolds, and the compression of the compressed energy storage spring 3 gradually decreases. During this process, the compressed energy storage spring 3 continuously releases its stored mechanical energy, providing auxiliary thrust for the lifting platform 5's upward movement. This auxiliary thrust, together with the main thrust of the hydraulic cylinder thrust unit 1, forms a combined force, propelling the lifting platform 5 to rise smoothly.

[0034] When the scissor brace stabilizing mechanism 2 is extended to a specific position, the compression of the energy storage spring 3 decreases to a critical point. At this time, the contact pressure between the hinge point and the spring seat gradually decreases until it completely disengages. After disengaging, the energy storage spring 3 enters a free state and no longer exerts a force on the scissor brace stabilizing mechanism 2.

[0035] After the compressed energy storage spring 3 enters its free state, the continued lifting and lowering movement of the lifting platform 5 is entirely driven independently by the hydraulic cylinder thrust unit 1. The hydraulic cylinder thrust unit 1 bears the entire load at this time, and through the continued extension of the piston rod, it pushes the scissor brace stabilizing mechanism 2 to further unfold, allowing the lifting platform 5 to continue rising to the target height. During this stage, the movement is entirely maintained by the thrust of the hydraulic system, and the compressed energy storage spring 3 no longer participates in the operation.

[0036] This transition in working state is achieved through mechanical coordination. The installation position and pre-compression amount of the compression storage spring 3 are adjusted so that the state transition occurs at the most suitable position, which fully utilizes the auxiliary role of the spring and avoids unnecessary interference to the system.

[0037] The entire state transition process relies entirely on the inherent characteristics of the mechanical structure, requiring no additional control devices or sensors. This design fully leverages the advantages of spring-assisted drive while avoiding interference from the spring when it is not in use, thus maximizing the performance of the entire drive system.

[0038] In some embodiments, the moving parts of the hydraulic cylinder thrust unit 1 are provided with a sealing structure to prevent water intrusion; The hinged parts of the scissor brace stabilizing mechanism 2 are equipped with an anti-corrosion treatment layer to resist water corrosion; The surface of the compression energy storage spring 3 is coated with an anti-corrosion coating to improve its underwater service life.

[0039] In some scenarios, the drive mechanism of the lifting platform provided in this embodiment of the invention may be used in immersion environments or even operate underwater, which brings many new underwater problems. Therefore, a new improvement scheme is proposed. The moving parts of the hydraulic cylinder thrust unit 1 can adopt a multi-seal structure. The piston rod seal uses a combined sealing ring, including a main seal and a secondary seal. The main seal is made of polyurethane material, which has good wear resistance and elasticity. The secondary seal is made of nitrile rubber material, providing an auxiliary sealing function. The static seal between the cylinder and the end cover adopts a composite seal of O-ring and retaining ring. The O-ring provides an initial seal, and the retaining ring prevents the sealing ring from being extruded.

[0040] The hinge joint of the scissor brace stabilizing mechanism 2 can be treated with multi-layer anti-corrosion measures. First, sandblasting is performed to remove rust, then an epoxy zinc-rich primer is applied, followed by an epoxy micaceous iron oxide intermediate coat, and finally a polyurethane topcoat is applied. The hinge pin surface is hard chrome plated to improve surface hardness and enhance corrosion resistance.

[0041] The surface protection of the compression energy storage spring 3 employs a multi-layered protective coating. First, a phosphating treatment forms a conversion film; then, an epoxy anti-corrosion primer is applied; and finally, a polyurethane topcoat is sprayed. The coating thickness is uniform, ensuring the spring surface is completely covered by the protective layer. The anti-corrosion coating thickness is increased at the spring's end rings, as these areas are more susceptible to corrosion damage.

[0042] This design allows the drive mechanism to adapt to various water quality environments, including freshwater, seawater, and water bodies containing chemicals. The protection system has a longer maintenance cycle, reducing maintenance workload and operating costs.

[0043] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A drive mechanism suitable for a shallow foundation pit lifting platform, characterized in that, include: Hydraulic cylinder thrust unit (1), scissor brace stabilizing mechanism (2) and compression energy storage spring (3); The hydraulic cylinder thrust unit (1) and the scissor brace stabilizing mechanism (2) are arranged symmetrically. The piston rod end of the hydraulic cylinder thrust unit (1) and the scissor brace stabilizing mechanism (2) are coaxially hinged to the lifting platform (5) through the hinge seat (41). The compression energy storage spring (3) is arranged near the hinge point of the scissor brace stabilizing mechanism (2) to provide auxiliary support when the scissor brace stabilizing mechanism (2) is in the contracted state.

2. The driving mechanism according to claim 1, characterized in that, The hydraulic cylinder thrust unit (1) and the scissor brace stabilizing mechanism (2) are symmetrically arranged in pairs below the lifting platform (5), and the tail of the cylinder of the hydraulic cylinder thrust unit (1) is hinged to the pit base (6). The scissor brace stabilizing mechanism (2) includes a first scissor arm (21) and a second scissor arm (22). One end of the first scissor arm (21) is coaxially hinged to the piston rod end of the hydraulic cylinder thrust unit (1) through the hinge seat (41), and the other end rolls along the pit guide rail (71) through the roller (42). One end of the second scissor arm (22) is hinged to the pre-embedded base (6) in the foundation pit, and the other end rolls along the platform guide rail (72) set at the bottom of the lifting platform (5) via the roller (42).

3. The driving mechanism according to claim 2, characterized in that, The compression energy storage spring (3) is configured in multiple groups and is arranged near each hinge point of the scissor brace stabilizing mechanism (2); The compression energy storage spring (3) is compressed and deformed when the scissor brace stabilizing mechanism (2) is in a contracted state, and is used to absorb and store mechanical energy and provide vertical upward auxiliary thrust.

4. The driving mechanism according to claim 3, characterized in that, When the scissor brace stabilizing mechanism (2) is in the contracted state, the compression energy storage spring (3) is deformed by pressure and together with the hydraulic cylinder thrust unit (1) undertakes the supporting role; When the scissor brace stabilizing mechanism (2) is opened to the predetermined height, the compression energy storage spring (3) disengages from contact and enters a free state. At this time, the lifting platform (5) continues to rise and fall independently driven by the hydraulic cylinder thrust unit (1).

5. The driving mechanism according to claim 4, characterized in that, The moving parts of the hydraulic cylinder thrust unit (1) are provided with a sealing structure to prevent water intrusion; The hinge part of the scissor brace stabilizing mechanism (2) is provided with an anti-corrosion treatment layer to resist water corrosion; The surface of the compression energy storage spring (3) is provided with an anti-corrosion coating to improve its underwater service life.

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