Cable well lid dismounting and mounting device

Abstract

The invention discloses a cable well lid disassembling and assembling device which comprises a machine base. The lifting unit comprises at least one pair of lifting stand columns, and the lifting unit is installed on the machine base; the clamping unit is installed on the lifting unit, the lifting unit is used for driving the clamping unit to move in the height direction, the clamping unit comprises a clamping jaw assembly and a moving assembly, the moving assembly is installed on the upper portion of the lifting unit, the clamping jaw assembly is installed on the moving assembly, and the moving assembly is used for adjusting the horizontal position and / or angle of the clamping jaw assembly relative to the cable well lid. And the working efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of power equipment technology, and in particular to a cable manhole cover disassembly and assembly device. Background Technology

[0002] Cable manhole covers are key municipal facilities used to cover cable manhole openings, and are widely used in urban underground pipeline systems such as power and communication networks. Their main functions are to protect the cable lines, joint equipment, and other ancillary facilities inside the manhole, prevent rainwater, dust, and foreign objects from entering, and prevent pedestrians or vehicles from accidentally entering and causing safety accidents, thereby ensuring the normal operation of the underground cable system and public safety.

[0003] Currently, most common cable manhole covers are made of cast iron, concrete, or high-strength composite materials, possessing high mechanical strength and load-bearing capacity. However, these materials also result in a significant weight for the manhole cover, typically reaching tens or even hundreds of kilograms. In actual maintenance operations, opening and installing cable manhole covers generally relies on manual operation. Workers often need to use simple tools such as crowbars and hooks, applying considerable force to pry and remove the cover. This traditional method is not only cumbersome, time-consuming, and labor-intensive, but also poses significant safety hazards, such as accidents caused by cover slippage, tool slippage, or improper force application leading to sprains or crush injuries.

[0004] Furthermore, manual opening makes precise positioning and smooth lifting difficult. In maintenance scenarios involving frequent manhole cover removal and installation, workers experience extreme labor intensity, are prone to fatigue, and this severely impacts work efficiency and quality. Especially in emergency repairs and intensive inspections where rapid response is crucial, traditional methods are insufficient to meet the demands of modern urban management. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cable manhole cover disassembly and assembly device, which can improve operational efficiency.

[0006] A cable manhole cover disassembly and assembly device according to a first aspect of the present invention includes: Base; A lifting unit includes at least one pair of lifting columns, and the lifting unit is mounted on the base; A clamping unit is installed on the lifting unit. The lifting unit is used to drive the clamping unit to move in the height direction. The clamping unit includes a gripper assembly and a moving assembly. The moving assembly is installed on the upper part of the lifting unit, and the gripper assembly is installed on the moving assembly. The moving assembly is used to adjust the horizontal position and / or angle of the gripper assembly relative to the cable manhole cover.

[0007] According to an embodiment of the present invention, a cable manhole cover disassembly and assembly device has at least the following beneficial effects: By setting a stable base as the overall support foundation, and coordinating the lifting unit and the clamping unit, a long-distance, non-contact clamping and lifting operation of the cable manhole cover is achieved, effectively avoiding safety hazards such as manhole cover slippage and tool rebound that may occur during manual prying, and significantly improving operational safety; the lifting unit drives the clamping unit to move up and down, replacing the traditional manual prying and carrying method, completely changing the outdated mode of relying on manual opening of manhole covers, greatly reducing the physical burden on operators, and is especially suitable for maintenance scenarios where manhole covers are frequently opened and closed; the movable component in the clamping unit can adjust the gripper component in water... The horizontal position and angle allow for precise alignment based on the actual location and orientation of the cable manhole cover, improving the device's applicability and operational efficiency, especially ensuring reliable operation even when the manhole cover is misaligned or the ground is uneven. The integration of lifting and clamping functions forms a complete operating system encompassing vertical lifting, horizontal movement, angle adjustment, and stable clamping, achieving mechanized operation throughout the entire manhole cover installation and removal process, thus enhancing the equipment's integration and intelligence. Mechanized lifting and movement control significantly shortens the time required for manhole cover opening and installation, accelerating on-site operations and reducing power outage or construction time. It is particularly suitable for emergency repairs and efficient inspection and maintenance in densely populated urban areas.

[0008] According to some embodiments of the present invention, the lifting column includes a fixed column and a movable column. The fixed column is fixedly installed on the base, and the movable column is retractably disposed within the fixed column. The fixed column is firmly installed on the base, providing a reliable support foundation for the entire lifting unit; the movable column is retractably disposed inside the fixed column, forming a stable inner and outer sleeve structure, which effectively resists lateral and torsional forces during lifting, ensuring the structural rigidity and operational stability of the device when carrying the manhole cover.

[0009] According to some embodiments of the present invention, a threaded rod is provided inside the fixed column, and the movable column is installed on the threaded rod through a threaded engagement. The lifting unit further includes a first motor, which is installed at the bottom of the fixed column. A first bevel gear is provided on the output shaft of the first motor, and a second bevel gear is provided on the threaded rod. The first bevel gear and the second bevel gear mesh and transmit power to drive the movable column to move along the height direction. The transmission method using a threaded rod and a threaded engagement between the threaded rod and the movable column has the characteristics of strong self-locking, smooth movement, and high positioning accuracy. During the lifting process, it can effectively prevent the movable column from sliding down due to heavy load, ensuring that the clamping unit remains stable when stopped at any height position, thus improving the safety and controllability of operation.

[0010] According to some embodiments of the present invention, the moving assembly includes a turntable, a second motor, a crossbeam, and an electric actuator. The crossbeam spans between the two lifting columns. The turntable is rotatably mounted on the bottom of the crossbeam. The second motor is fixedly mounted on the bottom of the crossbeam and drives the turntable to rotate. The electric actuator is disposed at the bottom of the crossbeam. The gripper assembly achieves horizontal movement via the electric actuator and rotational positioning via the second motor. By driving the gripper assembly to move linearly in the horizontal direction via the electric actuator, combined with the rotation of the turntable driven by the second motor, the gripper assembly has dual adjustment capabilities of horizontal displacement and angular rotation. This allows for flexible alignment with cable manhole covers in different positions and orientations, significantly improving the operational adaptability and positioning accuracy of the device.

[0011] According to some embodiments of the present invention, the gripper assembly includes a connecting seat, a first connecting plate, a second connecting plate, a first clamping plate, and a second clamping plate. A guide groove is provided at the bottom of the turntable, and the connecting seat is slidably disposed within the guide groove. One end of the first connecting plate and the second connecting plate are rotatably connected to the connecting seat, the first clamping plate is rotatably connected to the other end of the first connecting plate, and the second clamping plate is rotatably connected to the other end of the second connecting plate. The first clamping plate and the second clamping plate are hinged together at their middle portions, forming a symmetrical scissor structure. Through the scissor linkage mechanism formed by the hinged middle portion of the first clamping plate and the second clamping plate, combined with the linkage design of the connecting plates at both ends, the movement trajectories of the two clamping plates are coordinated and the forces are balanced during opening and closing. This allows for stable clamping or release of the cable manhole cover edge, effectively preventing slippage or uneven loading and improving clamping reliability.

[0012] According to some embodiments of the present invention, the first connecting plate and the second clamping plate are arranged in parallel, and the second connecting plate and the first clamping plate are arranged in parallel. This parallel relationship enables the first connecting plate, the second connecting plate, the first clamping plate, and the second clamping plate to form an approximately parallelogram-shaped linkage structure during movement, ensuring that the two clamping plates maintain coordinated and symmetrical movement during the opening and closing of the grippers, avoiding lateral offset or torsion during clamping, and improving clamping stability and centering accuracy.

[0013] According to some embodiments of the present invention, the ends of the first clamping plate and the second clamping plate are fitted with claw portions that are adapted to the edge of the cable manhole cover, and the claw portions are arranged opposite to each other. The claw portions are designed to fit the shape of the edge of the cable manhole cover, so as to fit tightly against the outer edge of the manhole cover or the reserved hole. Combined with the opposing clamping method, a bidirectional constraint force is formed, which effectively prevents the manhole cover from sliding, tilting or falling off during the clamping process, and significantly improves the stability and safety of clamping.

[0014] According to some embodiments of the present invention, the gripping unit further includes a locking block and a locking rod. The locking block is fixedly installed on the second clamping plate, and the locking rod is rotatably connected to the second connecting plate. The end of the locking rod can engage with the locking block to lock the gripper assembly in its open state. By engaging the end of the locking rod with the locking block fixed on the second clamping plate, mechanical locking can be achieved after the gripper assembly is fully open, effectively preventing it from accidentally closing due to vibration, external force, or its own weight during equipment movement or positioning, ensuring a safe and stable preparatory state before gripping.

[0015] According to some embodiments of the present invention, the locking block is teardrop-shaped, with an arc-shaped guide surface on its outer side and a slot at its bottom. The end of the locking rod is provided with a hook that matches the slot. The hook can engage or disengage from the slot under the guidance of the arc-shaped guide surface, achieving automatic locking and unlocking. The arc-shaped guide surface on the outer side of the locking block guides the hook at the end of the locking rod during the opening of the grippers. When the hook approaches the locking block, the arc-shaped surface automatically guides the hook to the slot position, eliminating the need for precise manual alignment and smoothly completing the locking action, thus improving the convenience and reliability of operation.

[0016] According to some embodiments of the present invention, the base is a rectangular frame structure, and wheels are respectively provided at the four corners of the bottom of the base. The wheels are equipped with locking structures to fix the base in the working position. The rectangular frame structure has good bending and torsional stiffness, which can provide a stable installation foundation for the upper mechanism such as the lifting unit and clamping unit, effectively distribute the load, and ensure that the overall structure does not deform or overturn when the equipment clamps and lifts heavy cable manhole covers, and operates smoothly and reliably.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of a cable manhole cover disassembly and assembly device according to an embodiment of the present invention; Figure 2 This is a cross-sectional schematic diagram of a cable manhole cover disassembly and assembly device according to an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram at point A in the middle; Figure 4 This is a schematic diagram of the gripping unit according to an embodiment of the present invention; Figure 5 This is one of the schematic diagrams of the locking block according to an embodiment of the present invention; Figure 6 This is a second schematic diagram of the locking block according to an embodiment of the present invention.

[0019] Reference numerals: Fixed column 100; Movable column 110; First motor 120; Base 130; Wheel 140; Second motor 150; Threaded rod 160; First bevel gear 170; Second bevel gear 180; Crossbeam 185; Turntable 190; Electric actuator 200; Connecting seat 210; Guide groove 220; First connecting plate 221; Second connecting plate 225; First clamping plate 230; Second clamping plate 240; Claw part 250; Locking block 260; Locking rod 270. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0022] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of these terms in this invention in conjunction with the specific content of the technical solution. In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0024] Reference Figures 1 to 6 A cable manhole cover disassembly and assembly device, comprising: Frame size 130; The lifting unit includes at least one pair of lifting columns, and the lifting unit is mounted on the base 130; A clamping unit is installed on a lifting unit. The lifting unit is used to drive the clamping unit to move in the height direction. The clamping unit includes a jaw assembly and a moving assembly. The moving assembly is installed on the upper part of the lifting unit, and the jaw assembly is installed on the moving assembly. The moving assembly is used to adjust the horizontal position and / or angle of the jaw assembly relative to the cable manhole cover.

[0025] By setting a stable base 130 as the overall support foundation, and coordinating the lifting and gripping units, remote, non-contact gripping and lifting operations of cable manhole covers are achieved. This effectively avoids safety hazards such as manhole cover slippage and tool rebound that may occur during manual prying, significantly improving operational safety. The lifting unit drives the gripping unit to move up and down, replacing the traditional manual prying and carrying method, completely changing the outdated mode of relying on manual manhole cover opening, greatly reducing the physical burden on operators, and is especially suitable for maintenance scenarios involving frequent opening and closing of manhole covers. The moving component in the gripping unit can adjust the position and angle of the gripper assembly in the horizontal direction, enabling it to... It can accurately align the cable manhole cover according to its actual position and orientation, improving the applicability and operational efficiency of the device, especially when the manhole cover is misaligned or the ground is uneven. It can still operate reliably. By combining the lifting and clamping functions, it forms a complete operating system that integrates vertical lifting, horizontal movement, angle adjustment and stable clamping, realizing the mechanization of the entire process of manhole cover installation and removal, and improving the integration and intelligence of the equipment. Through mechanized lifting and movement control, it significantly shortens the time for opening and installing manhole covers, speeds up the pace of on-site operations, and helps to shorten power outage or construction time. It is particularly suitable for emergency repairs and efficient inspection and maintenance in densely populated urban areas.

[0026] During operation, the operator moves the entire device directly above the target cable manhole cover, ensuring it is stably placed on the ground, with the base 130 providing support and fixation. The moving assembly, mounted on top of the lifting unit, is then activated. As needed, the moving assembly drives the gripper assembly below it to move precisely in the horizontal plane, such as forward / backward, left / right, or adjusting the angle of the gripper assembly (e.g., rotation) to accommodate irregular or asymmetrical handles / holes on the manhole cover. This ensures the grippers are accurately aligned and engage with the stress points on the cable manhole cover, preparing for safe gripping. After the gripper assembly achieves precise horizontal positioning, the lifting unit is activated, causing the entire gripping unit to descend smoothly and controllably in the vertical direction. The gripper assembly continues to descend until it fully engages with or contacts the handle / edge of the manhole cover, reaching the optimal gripping position. Once in position, the gripper assembly firmly grasps the manhole cover. Subsequently, the lifting unit reverses its direction, lifting the gripping unit upwards, and the manhole cover is smoothly lifted from the manhole and suspended at a certain height. After the manhole cover is raised to a safe height, the moving component is used again to move the gripper assembly holding the manhole cover horizontally to the designated storage position. Once the target position is reached, the gripper assembly releases, and the manhole cover is smoothly lowered. The entire device is then reset, ready for the next operation.

[0027] The lifting column includes a fixed column 100 and a movable column 110. The fixed column 100 is fixedly installed on the base 130, and the movable column 110 is retractably installed inside the fixed column 100. The fixed column 100 is firmly installed on the base 130, providing a reliable support foundation for the entire lifting unit; the movable column 110 is retractably installed inside the fixed column 100, forming a stable inner and outer sleeve structure, which effectively resists lateral and torsional forces during lifting, ensuring the structural rigidity and operational stability of the device when carrying the manhole cover.

[0028] During the installation and removal of cable manhole covers, the lifting column is used to adjust the height of the clamping unit. The fixed column 100 serves as the basic support structure, its lower end firmly fixed to the base 130 to ensure the stability of the overall structure. The movable column 110 is telescopically embedded inside the fixed column 100 and slides axially up and down via mechanical, hydraulic, or electric drive. When it is necessary to raise or lower the clamping unit, the power unit drives the movable column 110 to extend or retract relative to the fixed column 100, thereby causing the clamping unit mounted on it to move vertically in sync, achieving smooth lifting or accurate lowering of the cable manhole cover.

[0029] The device employs a nested, telescopic structure with a fixed column 100 and a movable column 110. This design reduces the overall height of the lifting column when retracted, facilitating transportation and storage and enhancing portability. During operation, the movable column 110 can be stably extended to meet the operational needs of cable wells at varying depths, offering a large lifting stroke and excellent structural rigidity. This compact design ensures smooth operation, high load-bearing capacity, and effectively guarantees the safety and reliability of the lifting process under heavy load conditions.

[0030] A threaded rod 160 is provided inside the fixed column 100, and the movable column 110 is installed on the threaded rod 160 via a threaded engagement. The lifting unit also includes a first motor 120, which is installed at the bottom of the fixed column 100. The output shaft of the first motor 120 is provided with a first bevel gear 170, and a second bevel gear 180 is provided on the threaded rod 160. The first bevel gear 170 and the second bevel gear 180 mesh and transmit power to drive the movable column 110 to move along the height direction. The transmission method using the threaded engagement between the threaded rod 160 and the movable column 110 has the characteristics of strong self-locking, smooth movement, and high positioning accuracy. During the lifting process, it can effectively prevent the movable column 110 from sliding down due to heavy load, ensuring that the clamping unit remains stable when stopped at any height position, thus improving the safety and controllability of operation.

[0031] When installing or removing cable manhole covers, the height of the clamping unit needs to be adjusted using a lifting unit. Specifically, a first motor 120 is installed at the bottom of the fixed column 100. When the first motor 120 is started, its output shaft drives the first bevel gear 170 to rotate. The first bevel gear 170 meshes with a second bevel gear 180 fixed to the bottom of the threaded rod 160, thus transmitting power to the threaded rod 160, causing it to rotate around its own axis. The threaded rod 160 is vertically installed inside the fixed column 100, and its outer circumference is threaded. The movable column 110 is connected to the threaded rod 160 through its internal threaded structure. As the threaded rod 160 continues to rotate, the movable column 110 moves up and down along the axial direction of the threaded rod 160 under the action of the threaded transmission, achieving telescopic movement along the height direction. By controlling the forward and reverse rotation of the first motor 120, the upward or downward movement of the movable column 110 can be precisely controlled, thereby driving the upper clamping unit to the required working height.

[0032] By incorporating a threaded rod 160 within the fixed column 100 and engaging it with the movable column 110, combined with the meshing transmission of the first bevel gear 170 and the second bevel gear 180 driven by the first motor 120, smooth and precise control of the lifting motion is achieved. The threaded transmission has a self-locking characteristic, reliably maintaining the position of the movable column 110 when work stops, preventing the clamping unit from sliding down due to gravity, significantly improving operational safety. The bevel gear transmission has a compact structure and can achieve vertical conversion of power direction, facilitating the efficient transmission of power from the horizontally arranged motor output shaft to the vertically arranged threaded rod 160, optimizing spatial layout, and improving transmission efficiency and system stability. This drive method is highly automated, easy to operate, and has a strong load-bearing capacity, effectively ensuring the reliability and controllability of the lifting process under heavy-duty conditions.

[0033] The moving assembly includes a turntable 190, a second motor 150, a crossbeam 185, and an electric actuator 200. The crossbeam 185 spans between two lifting columns. The turntable 190 is rotatably mounted on the bottom of the crossbeam 185. The second motor 150 is fixedly mounted on the bottom of the crossbeam 185 and drives the turntable 190 to rotate. The electric actuator 200 is located at the bottom of the crossbeam 185. The gripper assembly achieves horizontal movement via the electric actuator 200 and rotational positioning via the second motor 150. By driving the gripper assembly to move linearly in the horizontal direction via the electric actuator 200, combined with the rotation of the turntable 190 driven by the second motor 150, the gripper assembly possesses dual adjustment capabilities for horizontal displacement and angular rotation. This allows for flexible alignment with cable manhole covers in different positions and orientations, significantly improving the device's operational adaptability and positioning accuracy.

[0034] In the installation and removal of cable manhole covers, the moving assembly is used to precisely adjust the horizontal position and angle of the gripper assembly. The crossbeam 185 serves as the load-bearing structure, with two lifting columns connected to both ends to ensure overall stability. When the rotation angle of the gripper assembly needs adjustment, the second motor 150 is activated. The second motor 150 is fixed to the bottom of the crossbeam 185, and its output shaft directly or indirectly drives the turntable 190 to rotate around its central axis. Since the gripper assembly is connected to the turntable 190 via the electric actuator 200, the rotation of the turntable 190 causes the gripper assembly to rotate synchronously, thereby adjusting the azimuth angle of the gripper assembly relative to the manhole cover to accommodate handles or installation holes in different directions. When the horizontal position of the gripper assembly needs adjustment (such as forward / backward or radial movement), the electric actuator 200 is activated. One end of the electric actuator 200 is fixed to the bottom of the turntable 190, and the other end is connected to the gripper assembly. By controlling the extension and retraction stroke of the electric actuator 200, the gripper assembly can be pushed or pulled to move in a straight line in the horizontal plane. By coordinating the control of the second motor 150 and the electric push rod 200, the position and attitude of the gripper assembly can be flexibly adjusted in the horizontal plane to ensure that it is accurately aligned with and fits the stress-bearing parts of the cable manhole cover, thus preparing for subsequent clamping and lifting operations.

[0035] The moving assembly, consisting of a turntable 190, a second motor 150, a crossbeam 185, and an electric actuator 200, enables multi-degree-of-freedom adjustment of the gripper assembly in the horizontal direction. The second motor 150 drives the turntable 190 to rotate, giving the gripper assembly a rotational positioning function, adapting to manhole cover handles with different orientations, significantly improving the device's operational adaptability and flexibility. The electric actuator 200 provides linear push-pull force, enabling precise horizontal movement of the gripper assembly, facilitating fine-tuning and improving the gripping success rate. The crossbeam 185 connects two lifting columns, enhancing the rigidity and stability of the overall structure, ensuring no deformation or swaying occurs during off-center loading or dynamic adjustments. This moving assembly is compact, responsive, and highly precise in control. Combining rotational and linear motion, it allows the gripper to quickly and accurately reach the target position, effectively solving the alignment problem caused by manhole cover position deviations or asymmetrical handles, significantly improving the equipment's ease of operation, work efficiency, and safety reliability.

[0036] The gripper assembly includes a connecting seat 210, a first connecting plate 221, a second connecting plate 225, a first clamping plate 230, and a second clamping plate 240. A guide groove 220 is provided at the bottom of the turntable 190. The connecting seat 210 is slidably disposed within the guide groove 220. One end of the first connecting plate 221 and the second connecting plate 225 are rotatably connected to the connecting seat 210, respectively. The first clamping plate 230 is rotatably connected to the other end of the first connecting plate 221, and the second clamping plate 240 is rotatably connected to the other end of the second connecting plate 225. The first clamping plate 230 and the second clamping plate 240 are hinged together at their midpoints, forming a symmetrical scissor structure. Through the scissor linkage mechanism formed by the hinged midpoints of the first clamping plate 230 and the second clamping plate 240, combined with the linkage design of the connecting plates at both ends, the movement trajectory of the two clamping plates is coordinated and the force is balanced during opening and closing. This allows for stable clamping or release of the cable manhole cover edge, effectively preventing slippage or uneven loading and improving clamping reliability.

[0037] During the installation and removal of cable manhole covers, the gripper assembly performs the actions of gripping and releasing the manhole cover. The connecting seat 210 serves as the mounting base for the gripper assembly, and its bottom is slidably fitted into the guide groove 220 provided on the lower surface of the turntable 190. Under the push of the electric push rod 200, it can make linear reciprocating motion along the direction of the guide groove 220, thereby driving the entire gripper assembly to move horizontally.

[0038] Once the device is positioned above the target manhole cover, it begins the clamping operation. The connecting seat 210 is propelled forward by the electric actuator 200, causing the first connecting plate 221 and the second connecting plate 225 to rotate around their hinge point with the connecting seat 210. Since the first clamping plate 230 is hinged to the distal end of the first connecting plate 221, and the second clamping plate 240 is hinged to the distal end of the second connecting plate 225, and the first clamping plate 230 and the second clamping plate 240 are hinged together in the middle by a pin, forming a symmetrical scissor linkage mechanism, the linear motion of the connecting seat 210 is converted into a synchronous retraction action of the clamping ends of the first clamping plate 230 and the second clamping plate 240.

[0039] As the connecting seat 210 continues to move forward, the included angle of the scissor structure decreases, and the clamping ends of the two clamping plates gradually close, firmly clamping the handle or edge structure of the cable manhole cover. When released, the electric push rod 200 retracts, pulling the connecting seat 210 backward, the scissor structure moves in the opposite direction, the clamping ends open, and the manhole cover is released, completing one clamping cycle.

[0040] The gripper assembly adopts a symmetrical scissor structure consisting of a connecting seat 210, a first connecting plate 221, a second connecting plate 225, a first clamping plate 230, and a second clamping plate 240, which has significant mechanical advantages and reliability. The scissor linkage design realizes mechanical force amplification and motion amplification functions, that is, a small driving displacement can generate a large clamping stroke and a high clamping force, ensuring that heavy cable manhole covers can still be firmly clamped under low driving force, thereby improving energy utilization efficiency and clamping reliability.

[0041] The hinged joint at the middle and the linked structure at both ends of the first clamping plate 230 and the second clamping plate 240 ensures uniform clamping force distribution and synchronized action, avoiding uneven loading or slippage caused by unilateral force application, thus improving clamping stability and safety. The connecting seat 210 slides within the guide groove 220 of the turntable 190, providing precise guidance for the movement of the gripper assembly, ensuring the linearity and centering of the clamping action, and effectively preventing jamming or deviation. The overall structure is compact, highly efficient in transmission, and responsive, adaptable to manhole cover handles of different sizes, and possesses a certain degree of self-centering capability. This design not only enhances the versatility and adaptability of the gripper but also simplifies the drive method, reduces control complexity, and improves the practicality and ease of maintenance of the equipment. The first connecting plate 221 and the second clamping plate 240 are arranged in parallel, and the second connecting plate 225 and the first clamping plate 230 are arranged in parallel. The aforementioned parallel relationship enables the first connecting plate 221, the second connecting plate 225, the first clamping plate 230, and the second clamping plate 240 to form an approximately parallelogram linkage structure during movement, ensuring that the two clamping plates always maintain coordinated and symmetrical movement during the opening and closing of the gripper, avoiding lateral offset or torsion during clamping, and improving clamping stability and centering accuracy.

[0042] The ends of the first clamping plate 230 and the second clamping plate 240 have claw portions 250 that are adapted to the edge of the cable manhole cover, and the claw portions 250 are arranged opposite to each other. The claw portions 250 are designed to fit the shape of the edge of the cable manhole cover, so as to fit tightly against the outer edge of the manhole cover or the reserved hole. Combined with the opposing clamping method, a two-way constraint force is formed, which effectively prevents the manhole cover from sliding, tilting or falling off during the clamping process, and significantly improves the stability and safety of clamping.

[0043] During the installation and removal of cable manhole covers, the electric actuator 200 in the moving assembly can be used solely to adjust the horizontal position of the gripper assembly. Specifically, the electric actuator 200 is installed at the bottom of the crossbeam 185, and its telescopic rod is connected to the connecting seat 210 of the gripper assembly. When it is necessary to move the gripper assembly to a suitable gripping position above the manhole cover, the electric actuator 200 actuates, pushing or pulling the connecting seat 210 by telescopic movement, causing it to slide along the guide groove 220 provided at the bottom of the turntable 190, thereby achieving horizontal translation and positioning of the gripper assembly.

[0044] The opening and closing of the gripper assembly is controlled by an independent gripping drive mechanism (such as a pneumatic cylinder, hydraulic cylinder, or another motor-driven mechanism), independent of the electric actuator 200. Once the gripper assembly is precisely positioned by the electric actuator 200, the gripping drive mechanism is activated, driving the first connecting plate 221 and the second connecting plate 225 to move. This, in turn, causes the first clamping plate 230 and the second clamping plate 240 to rotate around their central hinge point, thus opening and closing the gripping ends. The ends of the first clamping plate 230 and the second clamping plate 240 are equipped with claw portions 250 that fit the edge of the cable manhole cover and are arranged opposite each other. During the gripping action, the two claw portions 250 close synchronously, accurately engaging with both sides of the manhole cover edge to complete the gripping process.

[0045] The gripping unit also includes a locking block 260 and a locking rod 270. The locking block 260 is fixedly installed on the second clamping plate 240, and the locking rod 270 is rotatably connected to the second connecting plate 225. The end of the locking rod 270 can engage with the locking block 260 to lock the gripper assembly in the open state. By engaging the end of the locking rod 270 with the locking block 260 fixed on the second clamping plate 240, mechanical locking can be achieved after the gripper assembly is fully open, effectively preventing it from accidentally closing due to vibration, external force, or its own weight during equipment movement or positioning, ensuring a safe and stable preparatory state before gripping.

[0046] In the preparation stage before the clamping unit performs the clamping operation, when the gripper assembly is in the open state, the first connecting plate 221 and the second connecting plate 225 can be driven to move by the clamping drive mechanism (such as cylinder or motor drive), which will drive the first clamping plate 230 and the second clamping plate 240 to rotate outward around the central hinge point, so that the end gripper portion 250 is fully opened, ready to be fitted into the edge of the cable well cover.

[0047] After the grippers reach their maximum open position, rotate the locking rod 270 so that its end aligns with and engages with the locking block 260 fixed on the second clamping plate 240, forming a reliable mechanical connection. At this time, the engagement between the locking rod 270 and the locking block 260 locks the open state of the gripper assembly, restricting the relative closing movement of the first clamping plate 230 and the second clamping plate 240. This locked state is maintained during the overall movement, lifting, or horizontal positioning of the equipment, ensuring that the grippers will not close accidentally due to vibration, inertia, or gravity.

[0048] When clamping action is required, first manually or through an auxiliary mechanism, disengage the locking rod 270 from the locking block 260 to release the locking state. Then, start the clamping drive mechanism to push the scissor linkage structure to retract, so that the two claws 250 close and clamp the edge of the well cover.

[0049] The mechanical locking mechanism, consisting of locking block 260 and locking rod 270, reliably locks the gripper assembly after it is fully open, effectively preventing accidental closure when not in operation. This design significantly improves the safety of the equipment during transportation, positioning, and alignment, avoiding the risk of equipment damage or personnel injury due to gripper malfunction.

[0050] The locking rod 270 and locking block 260 adopt a detachable snap-fit ​​structure, which is easy to operate, securely locked, and has good vibration resistance and stability. Especially in complex outdoor road conditions or during high-altitude fine-tuning, it ensures that the grippers always remain open, providing a guarantee for precise alignment. This locking function is independent of the clamping drive system and is a passive safety device. Even in the event of power failure, it can still maintain the locked state, further enhancing the system's safety redundancy. The overall structure is simple and practical, low in cost, and easy to maintain, making it an important technical measure to improve the safety and operational reliability of cable manhole cover installation and removal devices.

[0051] The locking block 260 is teardrop-shaped with an arc-shaped guide surface on its outer side and a slot at its bottom. The end of the locking rod 270 has a hook that matches the slot. The hook can engage or disengage from the slot under the guidance of the arc-shaped guide surface, achieving automatic locking and unlocking. The arc-shaped guide surface on the outer side of the locking block 260 guides the hook at the end of the locking rod 270 during the opening of the grippers. When the hook approaches the locking block 260, the arc-shaped surface automatically guides the hook to the slot position, eliminating the need for precise manual alignment and smoothly completing the locking action, thus improving the convenience and reliability of operation.

[0052] During the opening of the gripper assembly, when the first clamping plate 230 and the second clamping plate 240 are fully extended, the teardrop-shaped locking block 260 fixed on the second clamping plate 240 moves synchronously with them. The locking rod 270 is connected to the second connecting plate 225 via a pivot and can rotate around the pivot. When the operator or auxiliary drive mechanism pushes the locking rod 270 to rotate towards the locking block 260, the hook at the end of the locking rod 270 first contacts the arc-shaped guide surface on the outer side of the locking block 260. Under the action of the continuously applied rotational force, the hook slides along the arc-shaped guide surface, which guides and lifts the hook, allowing it to smoothly pass over the surface of the locking block 260. When the hook slides to the slot position at the bottom of the locking block 260, under the guidance of structural geometry and a slight external force, the hook automatically falls into the slot, completing the locking action. At this time, the opening state of the gripper assembly is firmly restricted. When unlocking is required, the locking lever 270 is rotated in the opposite direction. The hook is subjected to force within the slot and slides out again along the arc-shaped guide surface. The arc-shaped surface provides a smooth disengagement path during this process, reducing unlocking resistance and achieving smooth unlocking. The entire locking and unlocking process, guided by the arc-shaped guide surface, achieves automatic alignment and smooth engagement / disengagement between the hook and the slot, eliminating the need for precise manual alignment.

[0053] The use of a teardrop-shaped locking block 260, along with a mating structure between the outer arc-shaped guide surface and the bottom slot, significantly improves the ease of operation and reliability of the locking mechanism. The arc-shaped guide surface automatically guides and corrects the hook during the rotation of the locking rod 270. Even if there is a certain deviation in the initial alignment, it can guide the hook to slide smoothly into the slot, achieving "fault-tolerant" automatic locking, greatly reducing the difficulty of operation and improving work efficiency.

[0054] The matching design of the hook and slot ensures structural stability in the locked state, effectively resisting vibration, impact, and accidental contact, preventing the gripper assembly from accidentally closing during equipment movement or positioning, and ensuring operational safety. During unlocking, the arc-shaped guide surface also provides a smooth transition, reducing disengagement resistance and making the unlocking action easy and smooth.

[0055] The integrated locking mechanism combines a teardrop-shaped profile with mechanical guiding principles to achieve precise positioning, automatic engagement, labor-saving operation, and reliable locking. It is an innovative design that combines safety, practicality, and ergonomic advantages, and is particularly suitable for working environments with frequent disassembly and assembly operations.

[0056] The base 130 has a rectangular frame structure, with wheels 140 located at the four corners of its bottom. Each wheel 140 has a locking mechanism to secure the base 130 to its working position. This rectangular frame structure provides excellent bending and torsional rigidity, offering a stable mounting foundation for the lifting unit, clamping unit, and other upper mechanisms. It effectively distributes loads, ensuring that the overall structure remains undeformed and does not tip over when clamping or lifting heavy cable manhole covers, ensuring smooth and reliable operation.

[0057] The base 130, serving as the fundamental support structure for the entire cable manhole cover removal and installation device, adopts a rectangular frame design, providing excellent structural stability and load-bearing capacity. When the device needs to be moved, the operator can push the base 130, causing the wheels 140 at its four corners to roll, allowing for flexible transport and positioning at the work site. Once the device is positioned directly above the target cable manhole and preliminarily aligned, the operator activates the locking mechanism on the wheels 140 (such as a foot-operated brake lock, a knob locking device, or a pin-type retainer) to secure each wheel 140, preventing it from rolling. At this point, the entire base 130 is firmly positioned in the working position, preventing displacement or slippage due to force during lifting, clamping, or rotating operations, ensuring operational safety and positioning accuracy.

[0058] The rectangular frame base 130 possesses high torsional and bending stiffness, effectively supporting the lifting unit, clamping unit, and the heavy-duty cable manhole cover being clamped, ensuring the structural stability and safety of the entire equipment during operation. The four corner wheels 140 facilitate convenient mobility, significantly reducing the labor intensity of transferring the equipment between different manhole cover work points and improving operational efficiency. The locking structure equipped on the wheels 140 reliably secures the equipment after it is in place, preventing slippage due to uneven ground, external disturbances, or operational reaction forces, thus ensuring the smoothness and accuracy of the assembly and disassembly process. This design balances mobility and operational stability, featuring a simple structure, convenient operation, and suitability for various indoor and outdoor ground environments, enhancing the equipment's practicality and on-site adaptability.

[0059] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cable cover dismounting device, characterized in that, The utility model relates to a cable well cover lifting device, including: Machine base; Lifting unit including at least one pair of lifting column, the lifting unit is installed to machine base; Clamping unit, installed in the lifting unit, the lifting unit is used to drive the clamping unit moves in the height direction, the clamping unit includes jaw assembly and moving assembly, the moving assembly is installed in the upper portion of the lifting unit, the jaw assembly is installed in the moving assembly, the moving assembly is used to adjust the horizontal position and / or angle of the jaw assembly relative to the cable well cover.

2. A cable cover removal device according to claim 1, wherein, The lifting column includes a fixed column and a movable column, the fixed column is fixedly installed on the machine base, and the movable column is telescopically arranged in the fixed column.

3. A cable cover removal device according to claim 2, wherein, A threaded rod is arranged in the fixed column, the movable column is installed on the threaded rod by screwing, the lifting unit further comprises a first motor, the first motor is installed at the bottom of the fixed column, the output shaft of the first motor is provided with a first bevel gear, a second bevel gear is arranged on the threaded rod, the first bevel gear is meshed with the second bevel gear to drive the movable column to move in the height direction.

4. The cable cover removal device of claim 1, wherein, The moving assembly includes a turntable, a second motor, a cross beam and an electric push rod, the cross beam is connected between the two lifting columns, the turntable is rotatably installed at the bottom of the cross beam, the second motor is fixedly installed at the bottom of the cross beam and used to drive the turntable to rotate, the electric push rod is arranged at the bottom of the cross beam, the jaw assembly is horizontally moved by the electric push rod, and the jaw assembly is rotationally positioned by the second motor.

5. A cable cover removal device according to claim 4, wherein, The jaw assembly includes a connecting seat, a first connecting plate, a second connecting plate, a first clamping plate and a second clamping plate, the bottom of the turntable is provided with a guide groove, the connecting seat is slidably arranged in the guide groove, one end of the first connecting plate and the second connecting plate is rotatably connected to the connecting seat, the other end of the first connecting plate is rotatably connected to the first clamping plate, the other end of the second connecting plate is rotatably connected to the second clamping plate, and the middle portions of the first clamping plate and the second clamping plate are hingedly connected to each other to form a symmetrical scissor structure.

6. A cable cover removal device according to claim 5, wherein, The first connecting plate and the second clamping plate are arranged in parallel, and the second connecting plate and the first clamping plate are arranged in parallel.

7. A cable cover removal device according to claim 5, wherein, The end of the first clamping plate and the end of the second clamping plate are provided with claw portions matched with the edge of the cable well cover, and the claw portions are oppositely arranged.

8. A cable cover removal device according to claim 5, wherein, The clamping unit further comprises a locking block and a locking rod, the locking block is fixedly installed on the second clamping plate, the locking rod is rotatably connected to the second connecting plate, and the end of the locking rod can be clamped to the locking block to lock the open state of the jaw assembly.

9. A cable cover removal device according to claim 8, wherein, The locking block is in the shape of a water drop, an arc-shaped guide surface is arranged on the outer side of the locking block, a clamping groove is arranged at the bottom of the locking block, the end of the locking rod is provided with a clamping hook matched with the clamping groove, the clamping hook can be clamped into or separated from the clamping groove under the guidance of the arc-shaped guide surface to realize automatic locking and unlocking.

10. The cable cover removal device of claim 1, wherein, The machine base is in the form of a rectangular frame, wheels are arranged at the four corners of the bottom of the machine base, and the wheels are provided with locking structures to fix the machine base at a working position.

Images