Suspension bridge main cable moving platform structure

Abstract

The utility model relates to the technical field of suspension bridge mobile platform, concretely is a kind of suspension bridge main cable mobile platform structure, including main cable body, and its one end is fixedly connected with main hoop through cable saddle anchorage point, walking platform is arranged on the main cable body, and walking platform is provided with traction component between main hoop;The top of both ends of walking platform and the main cable body between main hoop are provided with auxiliary walking mechanism;The middle part of both ends of walking platform and the main cable body between main hoop are provided with auxiliary support mechanism.The utility model is driven by the cooperation of traction machine, self walking wheel and the initiative sliding wheel in front hoop, rear hoop, makes walking platform form multiple power sources on main cable body, effectively overcome the problem of insufficient driving force or skidding of single drive mode under the condition of slope change or uneven friction, improve the moving stability and operation efficiency of platform.

Description

Technical Field

[0001] This utility model relates to the field of suspension bridge moving platform technology, specifically a suspension bridge main cable moving platform structure. Background Technology

[0002] As one of the main forms of long-span bridges, suspension bridges rely on their main cables, which are the core components bearing the load of the bridge deck. Exposed to the natural environment for extended periods, these cables are susceptible to corrosion, wear, and fatigue, requiring regular inspection, painting maintenance, or localized repairs. Because the main cables are typically located at high altitudes and span large distances, traditional manual climbing or fixed scaffolding methods are inefficient and unsafe. Therefore, a working platform that can move along the main cable is needed to improve construction efficiency and ensure personnel safety.

[0003] Currently, some suspension bridge main cable moving platforms employ a single traction drive method, such as relying solely on winches or motors to pull steel wire ropes to move the platform. However, due to potential localized deformation, slope variations, or uneven friction on the main cable surface, a single drive method may result in insufficient driving force or slippage, affecting the platform's stability and moving efficiency, especially under long-distance or steep-slope conditions. Furthermore, existing moving platforms lack sufficient positioning stability on the main cable, are prone to lateral displacement, and lack effective auxiliary support systems to cope with stress variations in different sections of the main cable. These factors all restrict the safety and construction efficiency of high-altitude operations. Therefore, existing technologies urgently need improvement to address these issues. Utility Model Content

[0004] The purpose of this utility model is to provide a suspension bridge main cable moving platform structure that improves platform movement stability, prevents slippage, adapts to changes in main cable slope, and enhances lateral positioning capabilities.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A suspension bridge main cable moving platform structure, including

[0007] The main cable body has a main clamp fixedly connected to one end through a cable saddle anchor point. A walking platform is provided on the main cable body, and a traction component is provided between the walking platform and the main clamp.

[0008] Auxiliary walking mechanisms are provided between the top of both ends of the walking platform and the main cable body;

[0009] Auxiliary support mechanisms are provided at the midpoints of both ends of the walking platform and between the platform and the main cable body.

[0010] Preferably, the traction component includes a traction machine symmetrically fixedly connected to both sides of the front end of the walking platform, and a pulley fixedly connected to both ends of the main clamp by a steel wire rope. A second steel wire rope is slidably connected to the pulley. One end of the second steel wire rope is fixedly connected to the winch of the traction machine, and the other end passes around the pulley and is fixedly connected to the walking platform.

[0011] Preferably, the auxiliary walking mechanism includes jacks hinged to the top of both ends of the walking platform, and self-propelled wheels rollingly connected to the upper end of the main cable body. The self-propelled wheels are driven by a motor, and their wheel frames are hinged to the output end of the jacks. The clamping force between the self-propelled wheels and the main cable is adjusted by the telescopic movement of the jacks.

[0012] Preferably, the auxiliary support mechanism includes tracks that are symmetrically fixed to the middle of both sides of the walking platform. The two tracks are parallel to the main cable body at an angle. Front clamps and rear clamps are respectively provided at the top of the two sides of the two tracks. The bottom sides of the front clamps and rear clamps are slidably engaged with the tracks. Motor-driven active sliding wheels are symmetrically provided on the inner sides of the front clamps and rear clamps. The active sliding wheels form rolling contact with the main cable body through wheel surface friction.

[0013] Preferably, each of the four corners of the walking platform is hinged with a transverse electric push rod, and the output shaft of the electric push rod is fixedly connected to a transverse support wheel, which slides with the two end faces of the main cable body.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This suspension bridge main cable moving platform structure, through the coordinated drive of the traction machine, self-propelled wheels and active sliding wheels in the front and rear clamps, enables the moving platform to form multiple power sources on the main cable body, effectively overcoming the problem of insufficient driving force or slippage under the condition of slope change or uneven friction in a single driving mode, and improving the platform's moving stability and operation efficiency.

[0016] This suspension bridge main cable mobile platform structure uses jacks to adjust the clamping force of the self-propelled wheels, combined with the lateral limiting effect of the transverse support wheels driven by electric push rods, to ensure that the mobile platform maintains stable contact with the main cable body, preventing deviation or swaying. This solves the problem of insufficient stability caused by uneven force distribution when traditional mobile platforms are operating at heights, and improves construction safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall test structure of this utility model;

[0018] Figure 2 This is a top view of the overall structure of this utility model;

[0019] Figure 3This is a schematic diagram of the installation structure of the walking platform of this utility model;

[0020] Figure 4 This is a schematic diagram of the main structure of the walking platform of this utility model;

[0021] Figure 5 This is a front view structural diagram of the walking platform of this utility model.

[0022] In the diagram: 1. Main cable body; 2. Cable saddle anchor point; 3. Main clamp; 4. Traveling platform; 5. Traction machine; 6. Wire rope one; 7. Wire rope two; 8. Jack; 9. Self-propelled wheel; 10. Track; 11. Front clamp; 12. Rear clamp; 13. Electric push rod; 14. Lateral support wheel; 15. Pulley. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figure 1-5 As shown, this utility model provides a technical solution:

[0025] A suspension bridge main cable moving platform structure includes a main cable body 1, one end of which is fixedly connected to a main clamp 3 via a cable saddle anchor point 2. A walking platform 4 is mounted on the main cable body 1, and a traction component is provided between the walking platform 4 and the main clamp 3. The traction component includes a traction machine 5 symmetrically fixedly connected to both sides of the front end of the walking platform 4, and pulleys 15 fixedly connected to both ends of the main clamp 3 via a first steel wire rope 6. A second steel wire rope 7 is slidably connected to the pulleys 15. One end of the second steel wire rope 7 is fixedly connected to the winch of the traction machine 5, and the other end passes around the pulleys 15 and is fixedly connected to the walking platform 4. An auxiliary walking mechanism is provided between the top ends of the walking platform 4 and the main cable body 1. The auxiliary walking mechanism includes jacks 8 hinged to the top ends of the walking platform 4, and self-propelled wheels 9 rollingly connected to the upper end of the main cable body 1. The self-propelled wheels 9 are driven by a motor, and their wheel frames are hinged to the output end of the jacks 8. The telescopic movement of 8 is adjusted by the clamping force between the walking wheel 9 and the main cable body 1. The middle of both ends of the walking platform 4 is provided with an auxiliary support mechanism between the main cable body 1 and the middle of both sides. The auxiliary support mechanism includes a track 10 that is symmetrically fixed to the middle of both sides of the walking platform 4. The two tracks 10 are parallel to the main cable body 1 at an angle. The top of both sides of the two tracks 10 are respectively provided with a front clamp 11 and a rear clamp 12. The bottom sides of the front clamp 11 and the rear clamp 12 are slidably engaged with the track 10. The inner sides of the front clamp 11 and the rear clamp 12 are symmetrically provided with motor-driven active sliding wheels. The active sliding wheels form rolling contact with the main cable body 1 through wheel surface friction. The four corners of the walking platform 4 are all hinged with a transverse electric push rod 13. The output shaft of the electric push rod 13 is fixedly connected to a transverse support wheel 14. The transverse support wheel 14 is slidably engaged with the two end faces of the main cable body 1. The steel wire rope 7 is provided with a walking limit device 15.

[0026] Among them, the main clamp 3 refers to the clamping device that forms a rigid connection with the main cable body through the cable saddle anchor point. Specifically, it can be realized by adopting a split steel clamp structure, which forms a stable anchor point by fastening with high-strength bolts, and provides reaction force support for the traction components.

[0027] The traction component refers to the power transmission assembly that connects the main clamp and the traveling platform. Specifically, it can be achieved by using a wire rope and pulley block in conjunction with a traction machine, and the platform is moved by winding and unwinding the wire rope through a winch.

[0028] The auxiliary walking mechanism refers to the dynamic adjustment device set between the top of the platform and the main cable. Specifically, it can be implemented by combining articulated jacks and self-propelled wheels. The clamping force between the walking wheels and the main cable is controlled by adjusting the stroke of the jacks.

[0029] The auxiliary support mechanism refers to the distributed load-bearing components set in the middle of the platform between the platform and the main cable. Specifically, it can be implemented by combining sliding clamps and active friction wheels. The friction wheels are driven by a motor to form multi-point rolling contact with the main cable.

[0030] Specifically, the main clamp 3 forms a rigid fixed foundation through the cable saddle anchor point. One end of the steel wire rope in the traction component is connected to the main clamp, and the other end is connected to the traveling platform. The platform is driven by the traction machine to move actively along the main cable. The self-propelled wheels in the auxiliary traveling mechanism adjust the clamping force through jacks, automatically compensating for contact pressure in the deformation area of ​​the main cable surface to avoid slippage due to insufficient local friction. The sliding clamp in the auxiliary support mechanism moves along the track, and its inner active friction wheel forms rolling contact with the main cable through motor drive, sharing the gravity load during platform movement and preventing lateral slippage. The traction system provides active driving force, the traveling mechanism dynamically adjusts the contact state, and the support mechanism distributes the load. The three work together to ensure stable movement of the platform under different working conditions.

[0031] Compared to existing technologies, traditional solutions rely solely on a single traction system to drive the platform's movement, which can easily lead to insufficient driving force or slippage when encountering changes in the slope or local deformation of the main cable surface. This solution, by incorporating auxiliary walking and support mechanisms, creates multi-point dynamic contact on the main cable surface, enhancing driving redundancy and reducing dependence on local friction through distributed support. The synergistic effect of the traction components and auxiliary mechanisms enables the platform to adapt to changes in the main cable surface condition, overcoming the limitations of a single drive system under complex working conditions.

[0032] Through the above technical solution, this application effectively solves the problems of insufficient driving force and poor stability of the main cable mobile platform caused by surface deformation or uneven friction. The traction component provides active driving force, the auxiliary walking mechanism dynamically adjusts the contact pressure to prevent slippage, and the auxiliary support mechanism distributes the load to avoid lateral displacement. The synergistic effect of these three components enables the platform to maintain stable movement under complex surface conditions, significantly improving the safety and construction efficiency of high-altitude operations.

[0033] Among them, traction machine 5 refers to the motor drive device symmetrically arranged on both sides of the front end of the traveling platform, which can be an electric winch or a hydraulic winch, used to provide bidirectional traction force. Wire rope one refers to the fixing rope connecting the main clamp and the pulley, which can be a high-strength steel cable or synthetic fiber rope, used to stably fix the pulley at both ends of the main clamp. The pulley refers to the guide wheel installed at both ends of the main clamp, which can be a metal pulley with rolling bearings or a nylon pulley, used to change the traction direction of wire rope two and reduce frictional resistance. Wire rope two refers to the traction rope connecting the traction machine winch and the traveling platform, which can be a multi-strand wire rope or a rope with a wear-resistant coating, used to form a closed traction circuit and transmit traction force.

[0034] Specifically, when the traction machine starts, the winch drives the traveling platform along the main cable by winding and unwinding the second wire rope. The symmetrically arranged traction machine acts simultaneously on both ends of the second wire rope, ensuring the traction force is evenly distributed on both sides of the front end of the traveling platform, avoiding deviation or uneven force caused by unilateral traction. The first wire rope fixes the pulleys to both ends of the main clamp, forming a stable traction fulcrum. The pulleys reduce the resistance of the second wire rope during traction through rolling friction. After the second wire rope passes over the pulley, it forms a closed loop. When the winch winds up, the second wire rope slides on the pulley and propels the traveling platform forward; when the winch releases, the second wire rope slides in the opposite direction, slowing or stopping the platform. Through the cooperation of the pulleys and the wire rope, the direction of the traction force can be automatically adjusted according to the slope of the main cable, ensuring that the traction force is always transmitted along the axis of the main cable.

[0035] Compared to existing technologies, traditional single-point traction methods rely on a single point of drive, which can easily lead to insufficient traction or localized slippage when the slope changes or the surface friction of the main cable is uneven. This solution combines a symmetrical traction machine with a pulley closed loop to distribute the traction force to both sides of the traveling platform, and optimizes the traction direction through the guiding effect of the pulleys, thereby improving the efficiency of traction force transmission. At the same time, the closed loop design ensures that the steel wire rope maintains balanced tension throughout the traction process, avoiding the loss of driving force due to slack on one side.

[0036] Through the above technical solution, this application achieves bidirectional balanced traction of the traveling platform on the main cable, effectively preventing deviation or slippage caused by excessive unilateral traction force. The guiding effect of the pulleys reduces frictional loss during traction, making the platform move more smoothly. The closed traction circuit adapts to changes in the slope and local deformation of the main cable surface, ensuring continuous and stable transmission of traction force, and improving the platform's moving efficiency and safety under complex working conditions.

[0037] In this embodiment, the traction machine 5, the self-propelled wheel 9 and the active sliding wheel in the front clamp 11 and the rear clamp 12 are coordinated to create multiple power sources on the main cable body 1, which effectively overcomes the problem of insufficient driving force or slippage in the case of slope change or uneven friction of a single driving mode, and improves the mobility stability and operation efficiency of the platform.

[0038] Furthermore, by adjusting the clamping force of the self-propelled wheel 9 through the jack 8, and combined with the lateral limiting effect of the transverse support wheel 14 driven by the electric push rod 13, the walking platform 4 maintains stable contact with the main cable body 1, preventing deviation or shaking. This solves the problem of insufficient stability caused by uneven force when the traditional mobile platform is operating at height, and improves construction safety.

[0039] Working principle: The driving force of the walking platform 4 is provided by three parts working together. First, the traction machine 5 uses a winch to wind up and unwind the steel wire rope 7, causing the steel wire rope 7 to pass around the pulley 15 and pull the walking platform 4 along the main cable body 1, forming active traction. Second, the self-propelled wheel 9 is driven by a motor, and the clamping force is adjusted by the jack 8 to make it in close contact with the main cable body 1 and roll, providing auxiliary driving force. Finally, the active sliding wheels inside the front clamp 11 and the rear clamp 12 are driven by a motor, and they roll in contact with the main cable body 1 through friction, further propelling the walking platform 4 forward. The electric push rods 13 at the four corners of the walking platform 4 push the transverse support wheels 14 to press against both sides of the main cable body 1, enhancing stability. At the same time, the sliding cooperation between the track 10 and the front clamp 11 and the rear clamp 12 ensures the balance of the platform when it moves. The entire system, through the triple drive of the traction machine 5, the self-propelled wheel 9 and the active sliding wheel, combined with the stabilizing effect of the auxiliary support mechanism, ensures that the walking platform 4 moves smoothly and efficiently on the main cable body 1.

[0040] Among them, the jacks 8 hinged to the top of both ends of the walking platform refer to hydraulic or mechanical lifting devices installed in a rotatable connection manner. Specifically, they can be connected to the platform using double-eared hinge seats to adjust the contact posture of the self-propelled wheels when the surface angle of the main cable changes.

[0041] Among them, the self-propelled wheel 9 refers to the active walking wheel with a drive motor. Specifically, it can adopt a structure with rubber-coated wheel surface and built-in planetary reducer, and provide driving force through the rolling contact between the wheel surface and the main cable.

[0042] The hinged connection between the wheel frame and the output end of the jack refers to the ball joint connection between the support frame of the self-propelled wheel and the piston rod of the jack. Specifically, a universal joint structure with a self-lubricating bearing can be used, allowing the self-propelled wheel to deflect freely when adjusting the clamping force.

[0043] Specifically, when localized deformation or slope changes occur on the main cable surface, the jack adjusts the contact pressure between the self-propelled wheels and the main cable through its telescopic movement. Driven by a motor, the self-propelled wheels roll along the main cable. The hinged design between the wheel frame and the jack allows the wheels to automatically adjust their tilt angle according to the shape of the main cable, preventing jamming due to mismatched contact surfaces. The jack's pressure adjustment function ensures that the self-propelled wheels maintain sufficient adhesion under different friction conditions, preventing slippage.

[0044] Compared to existing technologies, traditional solutions using fixed clamping force or manual adjustment for the traveling wheels cannot adapt to changes in the surface condition of the main cable in real time, easily leading to insufficient driving force or excessive wheel wear. This solution achieves autonomous adaptation of the contact state between the traveling wheels and the main cable by dynamically adjusting the clamping force in conjunction with the articulated structure, thus solving the problem of driving force fluctuations caused by uneven friction or sudden slope changes.

[0045] Through the above technical solution, this application can automatically adjust the clamping force and contact angle of the walking wheels when the surface morphology of the main cable changes, ensuring that the driving wheel and the main cable maintain a stable friction force and effectively preventing slippage; at the same time, it avoids the increase in walking resistance or damage to the surface of the main cable caused by excessive clamping force, thereby improving the reliability and safety of platform movement.

[0046] The track refers to a rigid guide structure installed along the extension direction of the main cable, specifically made of I-beams or channel steel. Its function is to provide a sliding path for the front and rear clamps, allowing the clamp spacing to adaptively adjust according to local deformation of the main cable. The front and rear clamps are annular constraint components that cooperate with the track via sliding wheels. They can be split-type metal clamp structures, and their function is to form lateral limits through a bidirectional symmetrical layout, preventing platform offset. The active sliding wheel is a rolling component driven by a motor and with a friction coating on its surface. It can be a rubber-coated steel roller, and its function is to generate rolling friction with the surface of the main cable through active rotation, providing auxiliary driving force and enhancing anti-slip capability.

[0047] Specifically, the sliding fit between the track and the front and rear clamps allows them to move freely along the main cable's extension direction. When local deformation or slope changes occur on the main cable surface, the distance between the front and rear clamps can be automatically adjusted to avoid jamming caused by rigid supports. The active sliding wheels, driven by a motor, generate rolling contact with the main cable surface, supplementing traction in areas of uneven friction on the main cable. Simultaneously, the symmetrically arranged bidirectional wheel sets balance the distribution of driving force. The lateral restraint of the front and rear clamps limits lateral displacement caused by changes in the main cable's alignment during platform movement, ensuring stable travel along the predetermined path.

[0048] Compared to existing technologies, traditional solutions typically rely on a single traction mechanism to drive the platform, which cannot cope with fluctuations in driving force caused by uneven friction or local deformation of the main cable surface. This solution achieves dynamic support through the sliding cooperation of the track and clamps. Combined with the auxiliary drive of the active sliding wheel, it can adaptively adjust the driving force and constraint force in different sections of the main cable, avoiding stagnation or slippage caused by increased local resistance. In existing technologies, clamps are mostly fixed structures, making it difficult to adapt to changes in the main cable's alignment. This solution, however, uses a sliding track design to make the clamp spacing adjustable, further improving the adaptability of the support mechanism.

[0049] Through the above technical solutions, this application can effectively solve the problems of insufficient platform driving force and poor movement stability caused by local deformation or uneven friction on the main cable surface. The auxiliary drive of the active sliding wheel can compensate for the power fluctuation of the main traction system, the sliding cooperation between the track and the clamp can adapt to changes in the main cable alignment, and the bidirectional constraint design can suppress lateral displacement of the platform, thereby ensuring stable and efficient movement of the platform under complex working conditions.

[0050] The lateral electric actuator refers to a linear drive device arranged horizontally along the radial direction of the main cable. Specifically, it can be implemented using a ball screw structure driven by a servo motor. The contact pressure between the lateral support wheel and the side of the main cable is adjusted by the extension and retraction of the output shaft. The lateral support wheel is a cylindrical roller with a high-friction coefficient material on its surface, which can be implemented using a polyurethane-coated steel core structure. Its wheel surface maintains rolling contact with the plane or curved surface of the main cable, limiting the lateral displacement of the platform through friction. The articulation refers to the connection between the electric actuator and the traveling platform using a ball joint or universal joint. Specifically, it can be implemented using an articulation seat with a self-lubricating bearing, allowing the actuator to adapt to changes in the curvature of the main cable within a certain angle range.

[0051] Specifically, the electric actuators arranged at the four corners of the walking platform achieve dynamic matching with the spatial posture of the main cable through a hinged structure. When there is local deformation or slope change on the surface of the main cable, each electric actuator can independently adjust its extension and retraction to ensure that the lateral support wheels always fit against the side of the main cable. The lateral support wheels form rolling contact with the two end faces of the main cable, generating lateral constraint force during platform movement to counteract the lateral sliding tendency caused by uneven friction or center of gravity shift. The synergistic action of the four sets of electric actuators and support wheels forms a four-point spatial constraint. By adjusting the clamping force of each wheel in real time, the lateral stability of the platform is ensured under different working conditions.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A suspension bridge main cable moving platform structure, characterized in that: include The main cable body (1) has a main clamp (3) fixedly connected at one end through a cable saddle anchor point (2). A walking platform (4) is provided on the main cable body (1), and a traction component is provided between the walking platform (4) and the main clamp (3). Auxiliary walking mechanisms are provided between the top of both ends of the walking platform (4) and the main cable body (1); Auxiliary support mechanisms are provided between the middle of both ends of the walking platform (4) and the main cable body (1).

2. The suspension bridge main cable moving platform structure according to claim 1, characterized in that: The traction component includes a traction machine (5) symmetrically fixedly connected to both sides of the front end of the walking platform (4), and a pulley (15) fixedly connected to both ends of the main clamp (3) by a steel wire rope (6). A steel wire rope (7) is slidably connected to the pulley (15). One end of the steel wire rope (7) is fixedly connected to the winch of the traction machine (5), and the other end passes around the pulley (15) and is fixedly connected to the walking platform (4).

3. The suspension bridge main cable moving platform structure according to claim 2, characterized in that: The auxiliary walking mechanism includes jacks (8) hinged to the top of both ends of the walking platform (4) and self-propelled wheels (9) rollingly connected to the upper end of the main cable body (1). The self-propelled wheels (9) are driven by a motor, and their wheel frames are hinged to the output end of the jacks (8). The clamping force between the self-propelled wheels (9) and the main cable body (1) is adjusted by the telescopic movement of the jacks (8).

4. The suspension bridge main cable moving platform structure according to claim 3, characterized in that: The auxiliary support mechanism includes two tracks (10) that are symmetrically fixed to the middle of the two sides of the walking platform (4). The two tracks (10) are parallel to the main cable body (1) at an angle. The top of the two tracks (10) are respectively provided with a front clamp (11) and a rear clamp (12). The bottom ends of the front clamp (11) and the rear clamp (12) are slidably engaged with the tracks (10). The inner sides of the front clamp (11) and the rear clamp (12) are symmetrically provided with motor-driven active sliding wheels. The active sliding wheels form rolling contact with the main cable body (1) through wheel surface friction.

5. The suspension bridge main cable moving platform structure according to claim 4, characterized in that: The four corners of the walking platform (4) are all hinged with transverse electric push rods (13), and the output shaft of the electric push rods (13) is fixedly connected to transverse support wheels (14). The transverse support wheels (14) slide with the two end faces of the main cable body (1).

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