A universal wheel type lifting and transferring device for tunnel cable trench cover plate

Abstract

The utility model discloses a tunnel cable channel apron universal wheeled hoisting transfer device, worm wheel and worm rotation platform is installed on the mounting plate, has the bottom plate on the worm wheel and worm rotation platform, has the bearing column on the bottom plate, hoist front arm horizontal installation is in the bearing column top -end, hoist clamp is connected in hoist front arm front end through stainless steel lifting ring, the labor -saving rear arm is fixed in hoist front arm rear end, and the hoisting direction of hoist front arm and hoist clamp is adjusted through worm wheel and worm rotation platform rotation. The utility model discloses the mobile chassis as the main body frame of the device, through the insulation wheel as the mobile condition, so that the device can be freely moved in the construction area, at the same time, the arm length of adjustment front arm, rear arm reaches the effect of labor -saving lever, makes the construction personnel more safely conveniently operate the device, improves the construction efficiency, effectively reduces the labor intensity and the safety risk of construction personnel, thereby saves the construction cost, further guarantees the safety production.

Description

Technical Field

[0001] This utility model relates to the field of engineering equipment technology, and in particular to a universal wheel type lifting and transfer device for tunnel cable duct covers, which is suitable for lifting and transferring tunnel cable duct covers in tunnel lighting engineering, municipal engineering, railway engineering and other fields. Background Technology

[0002] In tunnel lighting projects, municipal engineering projects, and railway engineering projects, the lifting and transfer of cable duct covers is a common construction process. The omnidirectional wheeled lifting and transfer device, as a specialized movable wheeled lifting tool utilizing the lever principle of effort saving, can achieve the lifting and transport of cable duct covers. In actual operations, large-scale removal and repositioning of cable duct covers is often required; therefore, a safe, flexible, and efficient tool is urgently needed to improve work efficiency and ensure construction safety.

[0003] Currently, traditional wheeled lifting and transport devices have many shortcomings. They require a large amount of operating space, and in limited construction environments such as tunnels, they are prone to overlapping with other construction processes, which can lead to safety accidents and make it difficult to ensure the safety of construction operations. Furthermore, some traditional devices are not structurally reasonable, resulting in problems such as inconvenient assembly and disassembly, poor turning flexibility, inadequate labor-saving effect, and insufficient structural stability and durability, which cannot fully meet the needs of complex construction scenarios.

[0004] Therefore, developing a wheeled lifting and transfer device for tunnel cable trough covers that is easy to assemble and disassemble, has omnidirectional rotation function, is labor-saving and safe to operate, and has a stable and durable structure has become an urgent problem to be solved. This utility model is based on the above background and has been researched and developed. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of existing technologies that have high requirements for working space, significant safety hazards, and insufficient stability and flexibility of mechanical structure, and to provide a universal wheel lifting and transfer device for tunnel cable trough covers to meet the needs of safe and efficient lifting and transfer operations for tunnel cable trough covers.

[0006] This utility model is achieved through the following technical solution:

[0007] A universal wheel type lifting and transfer device for tunnel cable trough covers includes a lifting clamp, a lifting front arm, a labor-saving rear arm, and a mobile chassis. The mobile chassis includes insulated wheels, an axle, a load-bearing column, and a worm gear rotary table. The insulated wheels are rotatably mounted at both ends of the axle, and an mounting plate is installed in the middle of the axle. The worm gear rotary table is mounted on the mounting plate, and a base plate is fixed on the worm gear rotary table. The load-bearing column is fixed on the base plate. The lifting front arm is horizontally mounted on the top of the load-bearing column. The lifting clamp is connected to the front end of the lifting front arm through a stainless steel lifting ring. The labor-saving rear arm is fixed to the rear end of the lifting front arm. The lifting direction of the lifting front arm and the lifting clamp is adjusted by rotating the worm gear rotary table.

[0008] The lifting clamp is a scissor-type gravity clamp.

[0009] The lifting clamp includes scissor braces, self-locking nuts, and anti-slip rubber pads. Two scissor braces are connected at the center position by self-locking nuts. One end of the scissor brace is connected to a stainless steel lifting ring, and the other end is connected to the anti-slip rubber pad.

[0010] The lifting boom includes a front moving part and a rear fixed part. The rear fixed part is fixed to the load-bearing column. The rear end of the front moving part extends into the rear fixed part. A rocker screw is installed on the rear fixed part. The screw part of the rocker screw extends into the rear fixed part and is connected to the rear end of the front moving part. The rocker screw drives the front moving part to move back and forth.

[0011] The aforementioned labor-saving rear boom includes a telescopic rod, the lower end of which is fixed to the rear end of the lifting forearm, and a hand handle is fixed to the top of the telescopic rod. The length of the telescopic rod is adjusted by fastening pins on the telescopic rod.

[0012] The aforementioned worm gear rotary table is a manual worm gear rotary table.

[0013] An inclined support plate is fixedly connected to the mounting plate in the middle of the axle. A connecting rod is rotatably mounted on the support plate. An azimuth wheel is connected to the upper end of the connecting rod. The lower end of the connecting rod is connected to the worm of the worm gear rotary table through a universal joint. Rotating the azimuth wheel drives the worm gear rotary table to rotate.

[0014] The operation process is as follows:

[0015] Lowering: When the operator lowers the lifting forearm by leveraging the lever of the lifting arm, the lifting clamps will descend until their bottom contacts the cover plate.

[0016] Opening: Due to the weight of the clamp itself and the downward force, the lower jaws of the two clamping arms will naturally open outward. At this time, it can be "straddled" on both sides of the cover plate, or the jaws can be inserted into the pre-set holes in the cover plate.

[0017] Clamping: The clamp of the scissor brace structure is initially in the open state. When the operator lowers the clamp to the surface of the cover plate through the hoisting forearm, the clamp contacts the cover plate and bears the gravity load of the cover plate.

[0018] Under the influence of gravity, the angle of the scissor brace structure decreases, and the clamping end of the clamp automatically tightens and firmly clamps the cover plate; at the same time, the stainless steel lifting ring rigidly connects the clamp to the lifting arm to ensure stable transmission of lifting force and prevent the cover plate from falling off.

[0019] Release: After the device is in place, slowly lower the clamp. When the cover plate touches the ground, its gravity no longer acts on the gripper, the clamping force is automatically released, the gripper is released, and the device can be easily moved away.

[0020] This utility model is responsible for lifting, moving and precisely positioning the gripped heavy object. Its core is the lever principle and the adjustable arm length.

[0021] This invention features a longer, more labor-saving rear arm, allowing the operator to overcome the weight of the front-end object (cover plate) with less force.

[0022] The lifting boom consists of a front moving section and a rear fixed section. The rear fixed section is secured to the load-bearing column, while the front moving section can slide within it like a drawer. The rocker wheel screw is a helical transmission mechanism. When the operator turns the rocker wheel, the screw rotates, converting the rotational motion into linear motion of the front moving section through a threaded connection. Turning the rocker wheel clockwise or counterclockwise allows for precise control of the clamp's forward and backward position, ensuring it accurately reaches above the cover plate or the target transfer point, avoiding frequent vehicle movement and improving work efficiency and accuracy.

[0023] The operator rotates the connecting rod via the directional rocker wheel, and the connecting rod transmits power to the worm gear through a universal joint. The rotation of the worm gear drives the rotating table it meshes with to rotate.

[0024] The rotation of the rotary table causes the entire hoisting system (including the forearm, rear arm, and clamps) to rotate horizontally around the axis of the load-bearing column.

[0025] Worm gear drives have a large transmission ratio, which means that when the operator rotates the wheel many times, the lifting arm only rotates a small angle, thus achieving high-precision directional adjustment and accurately aligning the cover plate with narrow cable channels.

[0026] Self-locking safety: The worm gear mechanism has self-locking properties. When the operator stops rotating the azimuth wheel, no matter how heavy the cover plate at the front end of the lifting arm is, it will not drive the worm gear to rotate in the opposite direction, thus firmly locking the lifting arm at the current angle and preventing the turntable from rotating on its own due to excessive load, ensuring the safety and stability of the operation process.

[0027] Insulated wheels are installed at both ends of the axle and are made of insulating material. This is crucial in environments such as tunnels where electrical facilities may be present, effectively preventing the risk of short circuits or electric shocks caused by accidental contact with live parts, thus ensuring operational safety.

[0028] The axle, mounting plate, and load-bearing column form a stable three-point support structure. The load-bearing column not only supports the lifting arm but also transfers the weight of the entire lifting system to the axle, which is then evenly distributed to the ground via the insulated wheels, ensuring that the device remains stable and does not tip over when carrying heavy loads.

[0029] The advantages of this utility model are: 1. Superior construction performance: When applied to tunnel construction, this utility model, through the effective linkage between the hoisting front arm, the labor-saving rear arm and the mobile chassis, makes the device stable and reliable, which can significantly improve the construction efficiency of lifting and transporting cable trough covers, while greatly reducing the safety risks in the construction process.

[0030] 2. Significant economic and safety benefits: During the construction of cable duct cover plates in tunnels, this device can effectively reduce the number of construction personnel and lower labor costs; through a stable and reliable mechanical structure, it can protect workers and equipment from mechanical impact injuries, while also preventing the cover plates from being damaged during construction, thereby further reducing construction costs and safety risks.

[0031] 3. Promoting construction technology innovation: This utility model provides a brand-new construction device for tunnel cable renovation construction, which helps to improve the overall construction technology level and has good market promotion prospects and application value. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of this utility model;

[0033] Figure 2 This is a side view of the present invention;

[0034] Figure 3 This is a rear view of the present invention;

[0035] Figure 4 This is a top view of the present invention;

[0036] Figure 5 This is a partially enlarged view of the present utility model;

[0037] Figure 6 This is a schematic diagram of the connection structure between the connecting rod and the worm gear of this utility model;

[0038] Figure 7 This is a schematic diagram of the lifting clamp structure of this utility model. Detailed Implementation

[0039] like Figure 1-5 As shown, a universal wheel type lifting and transfer device for tunnel cable trough covers includes a lifting clamp 1, a lifting front arm 2, a labor-saving rear arm 3, and a mobile chassis. The mobile chassis includes insulated wheels 5, axles 6, load-bearing columns 7, and a worm gear rotary table 8. The insulated wheels 5 are rotatably mounted at both ends of the axles 6, and a mounting plate 9 is installed in the middle of the axles 6. The worm gear rotary table 8 is mounted on the mounting plate 9, and a base plate 10 is fixed on the worm gear rotary table 8. The load-bearing column 7 is fixed on the base plate 10. The load-bearing column 7 serves as the supporting foundation of the entire device, used to support other components and ensure the stability of the overall structure of the device. The lifting front arm 2 is horizontally mounted on the top of the load-bearing column 7. The lifting clamp 1 is connected to the front end of the lifting front arm 2 via stainless steel lifting rings 4. The labor-saving rear arm 3 is fixed to the rear end of the lifting front arm 2. The lifting direction of the lifting front arm 2 and the lifting clamp 1 is adjusted by rotating the worm gear rotary table 8.

[0040] like Figure 7 As shown, the lifting clamp 1 is a scissor brace type gravity clamp. The lifting clamp 1 consists of scissor braces 11, self-locking nuts 12, and anti-slip rubber pads 13. Two scissor braces 11 are connected and fixed at the center position by the self-locking nuts 12; one end of the scissor brace 11 is connected to a stainless steel lifting ring 4, which is installed at the lifting forearm 2; the other end is connected to the anti-slip rubber pad 13. During lifting operations, the frictional resistance between the anti-slip rubber pad 13 and the cable duct cover plate is used to achieve a stable clamping of the cover plate.

[0041] The lifting forearm 2 includes a front moving part 15 and a rear fixed part 16. The rear fixed part 16 is fixed to the load-bearing column 7. The rear end of the front moving part 15 extends into the rear fixed part 16. A rocker wheel screw 17 is installed on the rear fixed part 16. The screw portion of the rocker wheel screw 17 extends into the rear fixed part 16 and connects to the rear end of the front moving part 15. The rocker wheel screw 17 drives the front moving part 15 to move back and forth. By driving the screw with the rocker wheel, the lifting forearm can be extended and retracted, thereby flexibly adjusting the forearm length to meet the flexibility requirements of on-site construction.

[0042] The aforementioned labor-saving boom 3 includes a telescopic rod, the lower end of which is fixed to the rear end of the lifting boom 2. A hand handle 18 is fixed to the top of the telescopic rod, and the length of the telescopic rod is adjusted by a fastening pin 19. The telescopic rod is divided into two sections, and its length can be adjusted according to the actual working space by fastening the pin 19, thereby fully utilizing the labor-saving lever effect and reducing the labor intensity of the operator.

[0043] The worm gear rotary table 8 is a manual worm gear rotary table 8. The worm gear rotary table 8 is an existing integrated structure, which can be electric or manual. This embodiment uses the manual type to save resources.

[0044] like Figure 6 As shown, an inclined support plate 20 is fixedly connected to the mounting plate 9 in the middle of the axle 6. A connecting rod 21 is rotatably mounted on the support plate 20. An azimuth wheel 22 is connected to the upper end of the connecting rod 21. The lower end of the connecting rod 21 is connected to the worm 23 of the worm gear rotary table 8 via a universal joint 14. Rotating the azimuth wheel 22 drives the worm gear rotary table 8 to rotate. By using the azimuth wheel 22 to drive the universal joint 14 to rotate the worm gear, the azimuth angle can be adjusted, thus achieving the rotation of the lifting boom 2 angle. Simultaneously, self-locking can be achieved to adapt to different construction scenarios and operational needs. (The worm gear self-locking mechanism involves the worm driving the worm wheel, or the worm wheel not driving the worm.)

[0045] The mobile chassis serves as the main frame of the device, and the insulated wheels 5 provide mobility, allowing the device to move freely within the construction area. At the same time, adjusting the length of the forearm and rear arm achieves a lever-saving effect, making it safer and more convenient for construction workers to operate the device, improving construction efficiency, effectively reducing the labor intensity and safety risks of construction workers, thereby saving construction costs and further ensuring safe production.

[0046] Practical applications:

[0047] During the construction of the power supply system renovation project for the Three Gorges Special Highway Tunnel, the project faced the dual challenges of a tight construction schedule and a long construction area. Continuing to use traditional manual labor methods would easily lead to worker fatigue and significantly increase the risk of safety accidents. However, the universal wheel lifting and transferring device for tunnel cable trough covers described in this invention has successfully achieved high efficiency and safety in the removal and transportation of cable trough covers. Its unique structural design and functional characteristics significantly improve construction efficiency and effectively shorten the overall construction cycle; at the same time, it greatly reduces the labor intensity of construction workers and substantially reduces labor costs. Furthermore, the stable and reliable performance of the device provides a solid guarantee for safe production.

[0048] Practical application results show that the device performs exceptionally well in ensuring construction safety and improving construction efficiency, and has been highly recognized and praised by the construction unit. It has also been promoted and applied as an innovative highlight in the Three Gorges Dam area, fully demonstrating its technical advantages and practical value.

Claims

1. A universal wheel type lifting and transfer device for tunnel cable trough cover plates, characterized in that, The system includes a lifting clamp, a lifting boom, a labor-saving rear boom, and a mobile chassis. The mobile chassis includes insulated wheels, an axle, a load-bearing column, and a worm gear rotary table. The insulated wheels are rotatably mounted at both ends of the axle, and a mounting plate is installed in the middle of the axle. The worm gear rotary table is mounted on the mounting plate, and a base plate is fixed on the worm gear rotary table. The load-bearing column is fixed on the base plate. The lifting boom is horizontally mounted on the top of the load-bearing column. The lifting clamp is connected to the front end of the lifting boom via a stainless steel lifting ring. The labor-saving rear boom is fixed to the rear end of the lifting boom. The lifting direction of the lifting boom and the lifting clamp is adjusted by rotating the worm gear rotary table.

2. The universal wheel type lifting and transfer device for tunnel cable trough cover plates according to claim 1, characterized in that, The lifting clamp is a scissor-type gravity clamp.

3. The universal wheel type lifting and transfer device for tunnel cable trough cover plates according to claim 2, characterized in that, The lifting clamp includes scissor braces, self-locking nuts, and anti-slip rubber pads. Two scissor braces are connected at the center position by self-locking nuts. One end of the scissor brace is connected to a stainless steel lifting ring, and the other end is connected to the anti-slip rubber pad.

4. The universal wheel lifting and transferring device for tunnel cable trough cover plates according to claim 1, characterized in that, The lifting boom includes a front moving part and a rear fixed part. The rear fixed part is fixed to the load-bearing column. The rear end of the front moving part extends into the rear fixed part. A rocker screw is installed on the rear fixed part. The screw part of the rocker screw extends into the rear fixed part and is connected to the rear end of the front moving part. The rocker screw drives the front moving part to move back and forth.

5. The universal wheel type lifting and transfer device for tunnel cable trough cover plates according to claim 1, characterized in that, The aforementioned labor-saving rear boom includes a telescopic rod, the lower end of which is fixed to the rear end of the lifting forearm, and a hand handle is fixed to the top of the telescopic rod. The length of the telescopic rod is adjusted by fastening pins on the telescopic rod.

6. The universal wheel type lifting and transfer device for tunnel cable trough cover plates according to claim 1, characterized in that, The aforementioned worm gear rotary table is a manual worm gear rotary table.

7. The universal wheel type lifting and transfer device for tunnel cable trough cover plates according to claim 6, characterized in that, An inclined support plate is fixedly connected to the mounting plate in the middle of the axle. A connecting rod is rotatably mounted on the support plate. An azimuth wheel is connected to the upper end of the connecting rod. The lower end of the connecting rod is connected to the worm of the worm gear rotary table through a universal joint. Rotating the azimuth wheel drives the worm gear rotary table to rotate.

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