Bridge demolition hoisting mechanism

Abstract

The utility model relates to the technical field of bridge plate hoisting engineering, and discloses a bridge dismantling and hoisting mechanism which comprises a cross rod and two clamping assemblies, the two ends of the cross rod are connected with the two clamping assemblies respectively, and the cross rod is used for being connected with a crane so that the crane can drive the two clamping assemblies to move synchronously. Each clamping assembly comprises a rotating assembly and a lower bearing rod, and the end part of the cross rod is connected with the rotating assembly; the lower bearing rod is rotatably connected to the rotating assembly, the lower bearing rod has a vertically-arranged initial state and a horizontally-arranged clamping state, and the lower bearing rod can be switched between the initial state and the clamping state in the rotating process. By means of the rotatable lower bearing rod, automatic switching from an initial state (vertical arrangement) to a clamping state (horizontal arrangement) is achieved. An operator only needs to align the mechanism with a preformed hole and place the mechanism in the preformed hole, then clamping can be automatically completed through lifting of a crane, the operation process is greatly simplified, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge plate hoisting engineering technical field especially relates to a bridge demolition hoisting mechanism. BACKGROUND

[0002] With the accelerated pace of urbanization, the update and reconstruction of traffic infrastructure have become an important part of urban development. Among them, the bridge as the link connecting various regions of the city, its state is directly related to the smooth and safety of urban traffic. However, with the passage of time, many early construction of bridges due to the limitation of design standards, material performance and construction technology and other factors, have gradually been difficult to meet the growing traffic demand. In addition to the influence of multiple factors such as long-term bearing vehicle load, natural environment erosion, some active bridges have appeared structural aging, load capacity decline and other problems, and need to be reconstructed or rebuilt.

[0003] In the process of bridge reconstruction and reconstruction, the demolition work of old bridge is particularly important. At present, the bridge demolition technology mainly includes cutting method and blasting method. Although the blasting method is efficient, due to its potential great danger and the serious influence on the surrounding environment and residents' life, it is strictly limited in practical application. Therefore, the cutting method has become the mainstream method of bridge demolition due to its relative safety and strong controllability.

[0004] The cutting method mainly realizes the block demolition of the bridge by cutting the bridge structure with diamond wire saw driven by cutting machinery. In the demolition process, the bridge panel (such as hollow slab) needs to be reasonably blocked, and the reserved hole is drilled on the four corners of the blocked panel in advance, so as to facilitate the subsequent hoisting operation. However, the existing hoisting and demolition method of blocked panel has many inconveniences. In the specific operation, the workers need to pass the rope through the reserved hole on the bridge deck, and then lead the rope to the bridge below, so as to hoist the blocked panel by using the lifting equipment. This process is not only complicated and inefficient, but also in some special cases, such as the demolition of the bridge across the river, the operation space is limited, the manual operation is difficult, and the safety risk is also increased significantly. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a bridge demolition hoisting mechanism to solve the problem that the rope needs to be manually passed through the reserved hole when hoisting the blocked panel of the bridge deck, which leads to complicated operation and increases the safety risk.

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

[0007] The utility model provides a bridge demolition hoisting mechanism, including cross bar and two clamping components, cross bar both ends are connected with two clamping components respectively, cross bar is used for connecting crane, enables crane to drive two clamping components synchronous movement, each clamping component includes rotating assembly and lower support bar, cross bar end is connected with rotating assembly, lower support bar is rotatably connected on rotating assembly, lower support bar has the initial state of vertical arrangement and the clamping state of horizontal arrangement, and lower support bar can convert between the initial state and the clamping state during rotating.

[0008] According to the above technical features, the traditional hoisting method needs to manually pass the rope through the reserved hole of the bridge deck block plate, which is not only time-consuming and laborious, but also difficult to operate in complex or high-altitude working environments. The utility model realizes the automatic conversion from the initial state (vertical arrangement) to the clamping state (horizontal arrangement) through the rotatable lower support bar. The operator only needs to align the mechanism with the reserved hole and then hoist it with the crane to automatically complete the clamping, greatly simplifying the operation process and improving the work efficiency.

[0009] In the traditional hoisting method, manual rope threading is not only tedious but also has safety hazards such as high-altitude falling and object impact. The mechanism reduces the need for manual high-altitude operation through mechanized operation, significantly reducing safety risks.

[0010] Further, the rotating assembly includes an upper pressing rod, an outer frame, and a hinge assembly. The cross bar end is connected to the upper pressing rod. The outer frame is sleeved on the upper pressing rod and can move along the length direction of the upper pressing rod to approach or move away from the cross bar. The lower support bar end is rotatably installed on the upper pressing rod through the hinge assembly, and the lower support bar middle part is rotatably connected to the outer frame, so that the lower support bar is rotatably connected to the rotating assembly. When the outer frame approaches the cross bar, the lower support bar rotates to convert from the initial state to the clamping state. When the outer frame moves away from the cross bar, the lower support bar rotates to convert from the clamping state to the initial state.

[0011] According to the above technical features, the outer frame is used to connect with the crane. During the hoisting process, the outer frame moves along the length direction of the upper pressing rod under the drive of the crane and gradually approaches the connecting piece, so that the lower support bar rotates to convert from the initial state to the clamping state. This process does not require manual operation, significantly improving work efficiency and reducing safety risks caused by manual operation. When the outer frame approaches the connecting piece, the lower support bar gradually rotates to the horizontal position, forming a stable clamping state. The bridge deck block plate can be uniformly clamped during hoisting, preventing falling or shaking due to uneven force, and enhancing the stability of clamping.

[0012] Further, the hinge assembly includes a first rotating shaft, a second rotating shaft and a connecting piece, one end of the connecting piece is rotatably connected with the upper pressing rod through the first rotating shaft, the other end of the connecting piece is rotatably connected with the lower supporting rod through the second rotating shaft; when the lower supporting rod is in the initial state, the connecting piece is vertically arranged and is located on the same straight line with the upper pressing rod and the lower supporting rod; when the lower supporting rod is in the clamping state, the connecting piece is obliquely arranged and forms a triangular structure with the upper pressing rod and the lower supporting rod.

[0013] According to the above technical features, the connecting piece can be smoothly converted from vertical arrangement to oblique arrangement under the driving of the outer frame body through the rotating connection of the first rotating shaft and the second rotating shaft, thereby realizing the conversion of the lower supporting rod from the initial state to the clamping state. This process does not require additional operation or adjustment, realizing automation and high efficiency. At the same time, when the lower supporting rod is in the clamping state, the connecting piece is obliquely arranged, forming a stable triangular structure with the upper pressing rod and the lower supporting rod, which can ensure that the bridge deck block plate receives uniform clamping force during lifting, preventing it from falling off or shaking, thereby greatly improving the safety and reliability of the operation.

[0014] Further, the lower supporting rod is formed with an embedded hole, the embedded hole is matched with the end of the upper pressing rod, so that when the lower supporting rod forms a triangular structure with the upper pressing rod and the lower supporting rod, the end of the upper pressing rod can be inserted into the embedded hole.

[0015] According to the above technical features, when the lower supporting rod is in the clamping state and forms a triangular structure with the upper pressing rod and the connecting piece, the end of the upper pressing rod can be inserted into the embedded hole, which not only increases the connection point of the structure, but also further enhances the stability of the triangular structure through physical fitting, to ensure that the bridge deck block plate will not fall off or shake during lifting, thereby greatly improving the safety of the operation.

[0016] Further, the end of the upper pressing rod is formed with an anti-skid layer, which is used to abut against the embedded hole.

[0017] According to the above technical features, the design of the anti-skid layer significantly increases the friction between the end of the upper pressing rod and the edge of the embedded hole, effectively preventing the upper pressing rod from sliding relative to the embedded hole under stress, thereby ensuring the stability and reliability of the clamping state.

[0018] The anti-skid layer not only enhances the friction, but also optimizes the transmission of clamping force by providing a better contact surface. When the anti-skid layer is in close contact with the embedded hole, it can more effectively transmit the force received by the upper pressing rod to the lower supporting rod, thereby improving the stability and clamping effect of the entire clamping structure.

[0019] Further, the anti-skid layer adopts a rubber structure.

[0020] According to the above technical features, the rubber material has a very high friction coefficient, so the anti-skid layer with a rubber structure can significantly enhance the friction between the end of the upper pressing rod and the embedded hole, ensuring the stability and reliability of the clamping state, effectively preventing the bridge deck block plate from slipping or falling during lifting. At the same time, since the rubber material has good wear resistance and durability, it can maintain its anti-skid performance for a long time, meaning that the anti-skid layer can still maintain good working condition after multiple uses, prolonging the service life of the lifting mechanism. The rubber material also has a certain elasticity, so the anti-skid layer can play a certain shock-absorbing and buffering role when under stress, reducing the impact and vibration between the upper pressing rod and the lower supporting rod, and protecting the clamping structure from damage.

[0021] Further, the rotating assembly further comprises a hinge, which is installed on the outer frame body, and the middle part of the lower supporting rod is rotatably connected to the outer frame body through the hinge.

[0022] According to the above technical features, the design of the hinge allows the lower supporting rod to rotate flexibly relative to the outer frame body, so that the clamping assembly can adapt to bridge deck block plates of different sizes and shapes, thereby improving the versatility and adaptability of the mechanism.

[0023] The lower supporting rod connected by the hinge can more effectively transmit force during rotation. When the bridge deck block plate is clamped, the force is transmitted to the outer frame body through the hinge, and then dispersed to the entire mechanism by the outer frame body, thereby improving the stability and reliability of clamping.

[0024] Further, the outer frame body is a hollow structure, so that the outer frame body can be sleeved on the upper pressing rod; when the lower supporting rod is in the initial state, the connecting piece and at least part of the lower supporting rod are located in the outer frame body.

[0025] According to the above technical features, since the outer frame body adopts a hollow design, it can be closely sleeved on the upper pressing rod, reducing unnecessary space occupation. The connecting piece and part of the lower supporting rod are located in the outer frame body, further enhancing the compactness of the overall structure, making the entire mechanism more compact and lightweight.

[0026] Further, a slot is formed on the side wall of the outer frame body close to the lower supporting rod, and the slot is away from the hinge; when the lower supporting rod is in the clamping state, part of the lower supporting rod can be arranged horizontally through the slot, and the connecting piece can be arranged obliquely through the slot, so that the lower supporting rod can form a triangular structure with the upper pressing rod and the lower supporting rod.

[0027] According to the above technical features, by forming a slot on the outer frame body, and enabling the lower support rod to pass through the slot horizontally in the clamping state, while allowing the connecting piece to pass through the slot obliquely, the upper pressing rod, the lower support rod and the connection formed by the connecting piece can constitute a stable triangular structure, significantly improving the stability and load-bearing capacity of the entire mechanism.

[0028] The design of the slot makes the arrangement of the lower support rod and the connecting piece more flexible. The lower support rod can pass through the slot horizontally, while the connecting piece can pass through the slot obliquely. Such arrangement not only facilitates installation and adjustment, but also meets the clamping requirements of different sizes and shapes while maintaining structural stability.

[0029] Further, the outer frame body is formed with a lifting ring near one end of the horizontal rod, and the lifting ring is used to connect the crane, so that the crane can drive the outer frame body to move along the length direction of the upper pressing rod.

[0030] According to the above technical features, by forming a lifting ring on the outer frame body near the connecting piece, the crane and the outer frame body are conveniently connected, so that the crane can easily drive the outer frame body to move along the length direction of the upper pressing rod, greatly improving the flexibility and efficiency of operation.

[0031] The beneficial effects realized by the utility model are as follows:

[0032] The traditional hoisting method needs to manually pass the rope through the reserved hole of the bridge deck block plate. This process not only consumes time and effort, but also has great difficulty in operation in complex or high-altitude working environment. However, the utility model realizes automatic conversion from the initial state (perpendicular arrangement) to the clamping state (horizontal arrangement) through the rotatable lower support rod. The operator only needs to put the mechanism into the reserved hole, and then automatically complete the clamping through the crane lifting, which greatly simplifies the operation process and improves the working efficiency. In the traditional hoisting method, manual rope threading operation is not only tedious, but also has safety hazards such as high-altitude falling and object impact. However, the mechanism reduces the need for manual participation in high-altitude operation through mechanized operation, thereby significantly reducing the safety risk. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0034] Figure 2 It is a schematic diagram of the hinge assembly structure of the utility model;

[0035] Figure 3 It is a schematic diagram of the hinge structure of the utility model;

[0036] Figure 4 It is a schematic diagram of the lower support rod rotating structure of the utility model;

[0037] Figure 5 It is the lower support rod clamping state structure schematic view of the utility model;

[0038] Figure 6 It is the clamping assembly structure schematic view of the utility model;

[0039] 1, cross rod;

[0040] 2, clamping assembly; 21, lower support rod; 211, embedded hole; 22, upper pressing rod; 221, anti-skid layer; 23, outer frame body; 231, lifting ring; 232, slot; 24, hinged assembly; 241, first rotating shaft; 242, second rotating shaft; 243, connecting piece; 25, hinge.

[0041] The drawings are only used for illustrative description, and should not be understood as a limitation of the patent; in order to better illustrate the embodiment, some components in the drawings can be omitted, enlarged or reduced, and the size of the actual product is not represented; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings can be omitted; the same or similar reference numerals correspond to the same or similar components; the terms used to describe the positional relationship in the drawings are only used for illustrative description, and should not be understood as a limitation of the patent. DETAILED DESCRIPTION

[0042] It should be noted that the embodiments in the present application and the technical features in the embodiments can be combined with each other without conflict, and the detailed description in the specific embodiments should be understood as an explanation and description of the purpose of the present application, and should not be regarded as an improper limitation of the present application.

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the specific technical scheme of the present application will be further described in detail below in combination with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0044] In the embodiments of the present application, the terms "first" and "second" are only used for description purpose, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0045] In the embodiments of the present application, unless otherwise specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" can be fixed connection, or detachable connection, or integral; can be directly connected, or indirectly connected through intermediate medium.

[0046] In the embodiments of the present application, the terms "comprising", "containing" or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements not only includes those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0047] The technical solutions of the embodiments are described in detail below with reference to specific drawings.

[0048] As shown in Figure 1 The present embodiment proposes a bridge demolition hoisting mechanism, which comprises a crossbar 1 and two clamping assemblies 2, the two ends of the crossbar 1 are respectively connected with the two clamping assemblies 2, the crossbar 1 is used for connecting a crane, so that the crane can drive the two clamping assemblies 2 to move synchronously; each clamping assembly 2 comprises a rotating assembly and a lower support rod 21, the end of the crossbar 1 is connected with the rotating assembly; the lower support rod 21 is rotatably connected to the rotating assembly, the lower support rod 21 has a vertical initial state and a horizontal clamping state, and the lower support rod 21 can be converted between the initial state and the clamping state during rotation.

[0049] In the specific process of removing the bridge deck, the specific process of hoisting the bridge deck block plate is as follows:

[0050] Preparation: First, mark the bridge deck, then accurately set up removal holes on the four edges of each bridge deck block plate, the positions of these holes need to match the clamping assemblies 2 of the subsequent hoisting mechanism, to ensure that the hoisting mechanism can be smoothly placed and stably clamped.

[0051] Mechanism placement: the crane lifts the crossbar 1 through a lifting rope, the operator controls the crane to move along the bridge deck transversely, and places the lower support rod 21 in the initial state (vertically arranged) into the corresponding removal hole one by one. Since at least one pair of hoisting mechanisms (i.e. four clamping assemblies) are needed for each block plate to ensure the stability of lifting, therefore, it is necessary to ensure that the four lower support rods are accurately placed in the four removal holes.

[0052] Fixed connection: after the pair of hoisting mechanisms (i.e. four lower support rods) are placed in the removal holes, the fixed connection step is performed. The operator needs to fix the crossbar 1 and the block plate firmly on the bridge deck by counterweight, reinforcement or other appropriate fixing methods, to ensure the synchronous movement of the block plate and the hoisting mechanism during lifting, and prevent accidental falling or shaking.

[0053] Hoisting preparation: The crane is connected to the four rotating assemblies by hoisting ropes. Before hoisting, the operator needs to check whether all connection points are secure to ensure that the hoisting mechanism is securely connected to the block plate. At the same time, the crane operator needs to maintain close communication with the bridge operation personnel to ensure accurate transmission of hoisting instructions.

[0054] Hoisting and clamping conversion: The crane starts hoisting, at which time the lower support rod 21 gradually converts from the initial state (vertical arrangement) to the clamping state (horizontal arrangement) under the action of the hoisting force. As the lower support rod 21 rotates, the block plate is stably lifted onto the lower support rod. The operator needs to closely monitor any abnormal conditions during hoisting to ensure smooth and safe hoisting.

[0055] Transportation and unloading: After the block plate is successfully lifted, the crane transports it to the designated location for unloading. During unloading, the operator needs to control the crane to slowly descend to ensure that the block plate lands smoothly. After unloading is complete, the hoisting mechanism can be removed and adjusted, preparing for the hoisting of the next block.

[0056] Repeat the operation: The above steps will be repeated until all bridge block plates are successfully removed and transported.

[0057] The traditional hoisting method requires manual threading of the rope through the reserved hole of the bridge block plate, which not only consumes time and effort, but also has a high degree of difficulty in complex or high-altitude operation environments. This embodiment realizes automatic conversion from the initial state (vertical arrangement) to the clamping state (horizontal arrangement) through the rotatable lower support rod 21. The operator only needs to align the mechanism with the reserved hole and place it in, then automatically complete the clamping through the crane hoisting, greatly simplifying the operation process and improving the work efficiency.

[0058] In the traditional hoisting method, manual threading is not only tedious, but also has safety hazards such as high-altitude falling and object impact. This mechanism reduces the need for manual high-altitude operation through mechanized operation, significantly reducing safety risks.

[0059] As shown in Figure 1 and Figure 2 , the rotating assembly includes an upper pressing rod 22, an outer frame 23, and a hinge assembly 24. The end of the crossbar 1 is connected to the upper pressing rod 22. The outer frame 23 is sleeved on the upper pressing rod 22 and can move along the length direction of the upper pressing rod 22 to approach or move away from the crossbar 1. The end of the lower support rod 21 is rotatably installed on the upper pressing rod 22 through the hinge assembly 24, and the middle part of the lower support rod 21 is rotatably connected to the outer frame 23, so that the lower support rod 21 is rotatably connected to the rotating assembly. When the outer frame 23 approaches the crossbar 1, the lower support rod 21 rotates to convert from the initial state to the clamping state. When the outer frame 23 moves away from the crossbar 1, the lower support rod 21 rotates to convert from the clamping state to the initial state.

[0060] The outer frame 23 is used to connect with the crane. During the actual lifting process, the outer frame 23 moves along the length of the upper pressure rod 22 under the drive of the crane and gradually approaches the crossbar 1, causing the lower support rod 21 to rotate, thus changing from the initial state to the clamping state. This process does not require direct manual operation, significantly improving work efficiency and reducing the safety risks associated with manual operation. Meanwhile, as... Figure 4 As shown, when the outer frame 23 approaches the crossbar 1, the lower support rod 21 gradually rotates to a horizontal position, forming a stable clamping state. This allows the bridge deck panels to be subjected to uniform clamping force during the lifting process, preventing them from falling off or shaking due to uneven force, and enhancing the stability of the clamping.

[0061] like Figure 2 As shown, the hinge assembly 24 includes a first rotating shaft 241, a second rotating shaft 242, and a connector 243. One end of the connector 243 is rotatably connected to the upper pressure rod 22 via the first rotating shaft 241, and the other end of the connector 243 is rotatably connected to the lower support rod 21 via the second rotating shaft 242. When the lower support rod 21 is in its initial state, the connector 243 is vertically arranged and is on the same straight line as the upper pressure rod 22 and the lower support rod 21. Figure 5 and Figure 6 As shown, when the lower support rod 21 is in the clamping state, the connector 243 is arranged at an angle and forms a triangular structure with the upper pressure rod 22 and the lower support rod 21.

[0062] In this embodiment, through the rotational connection of the first rotating shaft 241 and the second rotating shaft 242, the connecting member 243 can smoothly change from a vertical arrangement to an inclined arrangement under the drive of the outer frame 23, thereby realizing the transformation of the lower support rod 21 from the initial state to the clamping state. This process requires no additional operation or adjustment, achieving automation and high efficiency. At the same time, when the lower support rod 21 is in the clamping state, the connecting member 243 is inclined, forming a stable triangular structure together with the upper pressure rod 22 and the lower support rod 21. This ensures that the bridge deck segments are subjected to uniform clamping force during lifting, preventing them from falling off or shaking, thereby greatly improving the safety and reliability of the operation.

[0063] like Figure 2 As shown, an embedding hole 211 is formed on the lower support rod 21. The embedding hole 211 is adapted to the end of the upper pressure rod 22 so that when the lower support rod 21, the upper pressure rod 22 and the lower support rod 21 form a triangular structure, the end of the upper pressure rod 22 can be inserted into the embedding hole 211.

[0064] When the lower supporting rod 21 is in the clamping state, forming a triangular structure with the upper pressing rod 22 and the connecting piece 243, the end of the upper pressing rod 22 can be inserted into the embedded hole 211, not only increasing the connection points of the structure, but also further enhancing the stability of the triangular structure through physical embedding, to ensure that the bridge deck block plates do not fall off or shake during lifting, thereby greatly improving the safety of the operation.

[0065] As shown in Figure 2 , the end of the upper pressing rod 22 is formed with an anti-skid layer 221 for abutting against the embedded hole 211.

[0066] The design of the anti-skid layer 221 significantly increases the friction between the end of the upper pressing rod 22 and the edge of the embedded hole 211, effectively preventing the upper pressing rod 22 from slipping relative to the embedded hole 211 when under stress, thereby ensuring the stability and reliability of the clamping state.

[0067] The anti-skid layer 221 not only enhances the friction, but also optimizes the transmission of clamping force by providing a better contact surface. When the anti-skid layer 221 is in close contact with the embedded hole 211, it can more effectively transmit the force received by the upper pressing rod 22 to the lower supporting rod 21, thereby improving the stability and clamping effect of the entire clamping structure.

[0068] The anti-skid layer 221 adopts a rubber structure.

[0069] Rubber material has a very high friction coefficient, so the anti-skid layer 221 with a rubber structure can significantly enhance the friction between the end of the upper pressing rod 22 and the embedded hole 211, ensuring the stability and reliability of the clamping state, effectively preventing the bridge deck block plates from slipping or falling off during lifting. At the same time, since rubber material has good wear resistance and durability, it can maintain its anti-skid performance for a long time, meaning that the anti-skid layer 221 can remain in good working condition after multiple uses, prolonging the service life of the lifting mechanism. Rubber material also has a certain elasticity, so the anti-skid layer 221 can play a certain shock-absorbing role when under stress, reducing the impact and vibration between the upper pressing rod 22 and the lower supporting rod 21, protecting the clamping structure from damage.

[0070] As shown in Figure 3 , the rotating assembly further includes a hinge 25 installed on the outer frame 23, and the lower supporting rod 21 is rotatably connected to the outer frame 23 through the hinge 25.

[0071] The design of the hinge 25 allows the lower supporting rod 21 to rotate flexibly relative to the outer frame 23, enabling the clamping assembly to adapt to bridge deck block plates of different sizes and shapes, thereby improving the versatility and adaptability of the mechanism.

[0072] The lower support rod 21 connected by the hinge 25 can transfer force more effectively during rotation. When the bridge deck panel is clamped, the force is transmitted to the outer frame 23 through the hinge 25, and then dispersed to the entire mechanism by the outer frame 23, thereby improving the stability and reliability of clamping.

[0073] As shown in Figure 6 the embodiment, the construction length requirements of the clamping assembly are discussed in detail to ensure that the mechanism can form a stable triangular unit during clamping and avoid any potential interference problems. The following is the improved technical description:

[0074] In the design of the clamping assembly, the key size parameters include the distance L2 between the first rotation shaft 241 and the second rotation shaft 242, the horizontal distance L1 from the second rotation shaft 242 to the center of the embedded hole 211, the horizontal distance d1 from the center of the embedded hole 211 to the axis of the hinge 25, the vertical distance L3 from the first rotation shaft 241 to the axis of the hinge 25, and the vertical distance d3 from the center of the embedded hole 211 to the bottom end of the lower support rod 21. These size parameters together determine the kinematic characteristics and clamping capacity of the clamping assembly.

[0075] Formation conditions of stable triangular unit:

[0076] To ensure that the clamping assembly can form a stable triangular unit in the clamped state, the following geometric conditions need to be met:

[0077] 1. L2 > L1: The distance L2 between the first rotation shaft 241 and the second rotation shaft 242 must be greater than the horizontal distance L1 from the second rotation shaft 242 to the center of the embedded hole 211. This condition ensures that during the rotation of the lower support rod 21, the part where the first rotation shaft 241 is located (such as the upper pressing rod 22 or the transmission member connected thereto) will not interfere with the embedded hole 211 or other parts of the lower support rod 21.

[0078] 2. (L3 + d3) ≤ (L1 + d1): The descending distance of the upper pressing rod 22 (i.e. the vertical descending distance L3 of the first rotation shaft 241 relative to the axis of the hinge 25 plus the vertical distance d3 from the center of the embedded hole 211 to the bottom end of the lower support rod 21) must be less than or equal to the turning radius of the lower support rod 21 (i.e. the horizontal distance L1 from the second rotation shaft 242 to the center of the embedded hole 211 plus the horizontal distance d1 from the center of the embedded hole 211 to the axis of the hinge 25). This condition ensures that during the descent of the upper pressing rod 22, it can smoothly embed into the embedded hole 211 without colliding with the lower support rod 21.

[0079] Geometric requirements and boundary conditions of triangular unit:

[0080] When the clamping assembly forms a stable triangular unit, the geometric requirements of its mechanism are not only limited to the above two conditions, but also need to consider the angle θ of the transmission member and the lower supporting rod. According to the cosine theorem and other geometric principles, the kinematic characteristics of the mechanism can be further analyzed. However, in this embodiment, in order to simplify the design and ensure reliability, we limit the angle θ of the transmission member and the lower supporting rod to be between 15° and 70°. This range not only ensures that the clamping assembly has sufficient clamping force, but also avoids interference or instability caused by too large an angle.

[0081] In summary, the clamping assembly design in this embodiment needs to meet the following boundary conditions:

[0082] 15°<θ<70°: Angle range of transmission member and lower supporting rod.

[0083] L2>L1: The distance between the first rotation axis and the second rotation axis is greater than the horizontal distance from the second rotation axis to the center of the embedded hole.

[0084] (L3+d3)≤(L1+d1): The downward distance of the upper pressing rod is less than or equal to the radius of rotation of the lower supporting rod.

[0085] The outer frame 23 is a hollow structure, so that the outer frame 23 can be fitted on the upper pressing rod 22; when the lower supporting rod 21 is in the initial state, the connecting member 243 and at least part of the lower supporting rod 21 are located inside the outer frame 23.

[0086] Since the outer frame 23 adopts a hollow design, it can be closely fitted on the upper pressing rod 22, reducing unnecessary space occupation. The connecting member 243 and part of the lower supporting rod 21 are located inside the outer frame 23, further enhancing the compactness of the overall structure, making the entire mechanism more compact and lightweight.

[0087] As shown in Figure 2 and Figure 5 , the outer frame 23 forms a slot 232 on the side wall close to the lower supporting rod 21, and the slot 232 is away from the hinge 25; when the lower supporting rod 21 is in the clamping state, part of the lower supporting rod 21 can be arranged horizontally through the slot 232, and the connecting member 243 can be arranged obliquely through the slot 232, so that the lower supporting rod 21 can form a triangular structure with the upper pressing rod 22 and the lower supporting rod 21.

[0088] By forming a slot 232 on the outer frame 23, and allowing part of the lower supporting rod 21 to be arranged horizontally through the slot in the clamping state, while allowing the connecting member 243 to be arranged obliquely through the slot, the upper pressing rod 22, the lower supporting rod 21, and the connection formed by the connecting member 243 can form a stable triangular structure, significantly improving the stability and load-bearing capacity of the entire mechanism.

[0089] The design of the slot 232 makes the arrangement of the lower support rod 21 and the connecting piece 243 more flexible. The lower support rod 21 can be arranged horizontally through the slot 232, and the connecting piece 243 can be arranged obliquely through the slot 232. Such an arrangement not only facilitates installation and adjustment, but also meets the clamping requirements of different sizes and shapes while maintaining structural stability.

[0090] As shown in Figure 1 , Figure 4 and Figure 5 , the outer frame body 23 is formed with a lifting ring 231 near one end of the horizontal rod 1, and the lifting ring 231 is used to connect a lifting machine, so that the lifting machine can drive the outer frame body 23 to move along the length direction of the upper pressing rod 22. In the present embodiment, the lifting ring 231 is formed on the outer frame body 23 near the connecting piece 1, which realizes the convenient connection of the lifting machine and the outer frame body 23, so that the lifting machine can easily drive the outer frame body 23 to move along the length direction of the upper pressing rod 22, greatly improving the flexibility and efficiency of operation.

[0091] The above-mentioned sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the present application, is also included in the patent protection scope of the present application.

Claims

1. A demolition hoist for a bridge, characterized in that, The device comprises a crossbar (1) and two clamping assemblies (2), the crossbar (1) is connected with the two clamping assemblies (2) respectively, and the crossbar (1) is used for connecting a crane, so that the crane can drive the two clamping assemblies (2) to move synchronously. Each clamping assembly (2) comprises a rotating assembly and a lower supporting rod (21), the end of the crossbar (1) is connected with the rotating assembly, and the lower supporting rod (21) is rotatably connected with the rotating assembly, the lower supporting rod (21) has an initial state arranged vertically and a clamping state arranged horizontally, and the lower supporting rod (21) can be converted between the initial state and the clamping state during rotation.

2. A demolition hoist mechanism for a bridge according to claim 1, wherein The rotating assembly comprises an upper pressing rod (22), an outer frame (23) and a hinge assembly (24), the end of the crossbar (1) is connected with the upper pressing rod (22), the outer frame (23) is sleeved on the upper pressing rod (22), the outer frame (23) can move along the length direction of the upper pressing rod (22) to approach or move away from the crossbar (1), the end of the lower supporting rod (21) is rotatably installed on the upper pressing rod (22) through the hinge assembly (24), and the middle part of the lower supporting rod (21) is rotatably connected with the outer frame (23), so that the lower supporting rod (21) is rotatably connected with the rotating assembly, when the outer frame (23) approaches the crossbar (1), the lower supporting rod (21) rotates to convert from the initial state to the clamping state, and when the outer frame (23) moves away from the crossbar (1), the lower supporting rod (21) rotates to convert from the clamping state to the initial state.

3. A demolition hoist mechanism for a bridge according to claim 2, wherein The hinge assembly (24) comprises a first rotating shaft (241), a second rotating shaft (242) and a connecting piece (243), one end of the connecting piece (243) is rotatably connected with the upper pressing rod (22) through the first rotating shaft (241), the other end of the connecting piece (243) is rotatably connected with the lower supporting rod (21) through the second rotating shaft (242), when the lower supporting rod (21) is in the initial state, the connecting piece (243) is vertically arranged and located on the same straight line with the upper pressing rod (22) and the lower supporting rod (21), and when the lower supporting rod (21) is in the clamping state, the connecting piece (243) is obliquely arranged and forms a triangular structure with the upper pressing rod (22) and the lower supporting rod (21).

4. A demolition hoist mechanism for a bridge according to claim 3, wherein An embedded hole (211) is formed on the lower supporting rod (21), the embedded hole (211) is matched with the end of the upper pressing rod (22), so that when the lower supporting rod (21), the upper pressing rod (22) and the lower supporting rod (21) form a triangular structure, the end of the upper pressing rod (22) can be inserted into the embedded hole (211).

5. A demolition hoist mechanism for a bridge according to claim 4, wherein The end of the upper pressing rod (22) is provided with an anti-skid layer (221), and the anti-skid layer (221) is used for abutting with the embedded hole (211).

6. A demolition hoist mechanism for a bridge according to claim 5, wherein The anti-skid layer (221) adopts a rubber structure.

7. A demolition hoist mechanism for a bridge according to claim 3, wherein The rotating assembly further comprises a hinge (25) mounted on the outer frame (23), and the middle part of the lower supporting rod (21) is rotatably connected with the outer frame (23) through the hinge (25).

8. A demolition hoist mechanism for a bridge according to claim 7, wherein The outer frame (23) is a hollow structure, so that the outer frame (23) can be sleeved on the upper pressing rod (22); when the lower supporting rod (21) is in the initial state, the connecting piece (243) and at least part of the lower supporting rod (21) are located in the outer frame (23).

9. A demolition hoist mechanism for a bridge according to claim 8, wherein The outer frame (23) is formed with a slot (232) on the side wall close to the lower supporting rod (21), and the slot (232) is away from the hinge (25); when the lower supporting rod (21) is in the clamping state, part of the lower supporting rod (21) can be horizontally arranged through the slot (232), and the connecting piece (243) can be obliquely arranged through the slot (232), so that the lower supporting rod (21) can form a triangular structure with the upper pressing rod (22) and the lower supporting rod (21).

10. A demolition hoist mechanism for a bridge according to claim 8, wherein The outer frame (23) is formed with a lifting ring (231) close to one end of the cross rod (1), and the lifting ring (231) is used for connecting the crane, so that the crane can drive the outer frame (23) to move along the length direction of the upper pressing rod (22).

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