A heavy duty sky crane for combining LED curtain screens

Abstract

The application discloses a heavy-duty overhead traveling crane for combined LED curtain screen, which comprises an overhead traveling crane movable platform arranged horizontally, vertical support columns arranged on the left and right sides below the overhead traveling crane movable platform, hydraulic telescopic rods fixedly connected with the overhead traveling crane movable platform arranged at the top of the support columns, and fixed bases with bolts fixedly installed at the lower ends of the support columns. The heavy-duty overhead traveling crane for combined LED curtain screen adopts a novel structure design, so that when the device is used, the workers are lifted to the top of the overhead traveling crane movable platform by using the lifting elevator, the workers can stand on the top of the overhead traveling crane movable platform to work, and when leaning against the wall, the movable protective fence can be lowered to increase the overall use range of the overhead traveling crane movable platform, and in the process of hoisting, the anti-falling net is driven to rotate to the horizontal position, so that the LED curtain main body is prevented from directly falling to the ground and being damaged in the hoisting process.

Description

Technical Field

[0001] This invention relates to the field of overhead crane technology, specifically a heavy-duty overhead crane for assembling LED screens. Background Technology

[0002] An overhead crane is a type of bridge lifting equipment. The lifting trolley moves laterally along the track laid on the bridge frame, forming a lateral movement trajectory. It can lift objects on the ground to the top of the overhead crane. When installing LED screens, an overhead crane is needed to lift the main body of the screen to the required height for assembly.

[0003] In the prior art, Chinese Patent No. CN207861727U discloses a crane stacking device for precast component mold platforms, including a first crane and a second crane, which are close to each other. Crane beams are installed on both cranes, and two lifting trolleys are mounted on each. Hooks are installed at the lower part of each lifting trolley. A mold platform is located at the bottom of both cranes, and the four corners of the mold platform are connected to the hooks at the bottom of the lifting trolleys. Both cranes are equipped with crane wheels, which are powered by crane motors, allowing the precast concrete component mold platform to move freely. This solves the lifting problem in production without increasing the number of cranes, is simple to operate, safe and convenient to use, greatly reduces equipment costs, and increases the production speed of components.

[0004] The above-mentioned device uses a crane trolley to lift objects, but during the LED installation process, when the main body of the curtain is lifted to a specified height, workers still need to assemble and fix the curtain. The above-mentioned crane device does not provide a platform for workers to stand and work, so that workers do not have an effective point of leverage when assembling the main body of the curtain, which brings some trouble to the overall installation process.

[0005] Furthermore, in the prior art, Chinese Patent No. CN113864613B discloses a heavy-duty overhead crane for assembling LED screens, including a crane body; a support turntable installed at the bottom of the crane body; the support turntable being rotatably connected to the crane body; a first power device installed inside the crane body; the output end of the first power device contacting the support turntable; multiple sets of support frames installed on the top of the crane body; guide wheels installed on the side walls of the support frames that are close to each other; the guide wheels being rotatably connected to the support frames; a second power device installed inside the crane body; a first sprocket installed at the output end of the second power device; by adjusting the original crane movement method from rack and pinion to a gear and chain combination, arc-shaped track movement can be achieved, with high precision and less slippage.

[0006] The aforementioned device uses a track to move the device during operation. However, during the movement, the main body of the curtain to be assembled is hoisted from below the gantry crane. Therefore, if the hoisting device of the gantry crane is damaged during this process (i.e., the hoisting rope breaks or parts fall off), the hoisted main body of the curtain will fall off. The falling curtain body is easily damaged when it hits the ground under the action of gravity, resulting in significant economic losses. Summary of the Invention

[0007] The purpose of this invention is to provide a heavy-duty overhead crane for assembling LED screens, in order to solve the problems mentioned in the background art, such as the inconvenience for operators to stand and work, and the lack of effective protection measures for the main body of the screen during the hoisting process.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a heavy-duty overhead crane for assembling LED screens, comprising a horizontally arranged crane platform, vertically arranged support columns on the left and right sides below the crane platform, a hydraulic telescopic rod fixedly connected to the crane platform at the top of each support column, and a fixed base with bolts fixedly installed at the lower end of each support column, further comprising:

[0009] A fixed bracket is fixedly installed on the right end of the upper surface of the crane's movable platform. The fixed bracket has an overall "7" shape structure, and a cage-shaped elevator is provided below the fixed bracket. An entrance and exit are provided on the front outer surface of the elevator.

[0010] A hoisting plate is horizontally positioned in front of the crane's movable platform and support column. Fixing straps are fixedly installed on the lower surface of the hoisting plate, and two fixing straps are symmetrically arranged about the longitudinal centerline of the hoisting plate. An LED screen body for assembly is tied to the inner side of the fixing straps.

[0011] The longitudinal support rod is fixedly installed on the outer surface of the inner side of the crane's movable platform. Two longitudinal support rods are symmetrically arranged on the left and right sides about the crane's movable platform, and a transverse support rod is fixedly installed at the top of the longitudinal support rod.

[0012] A traveling trolley is installed through the outside of the transverse support rod. The traveling trolley and the transverse support rod form a left-right sliding structure through the internal drive mechanism, and the position of the traveling trolley corresponds vertically to the position of the lifting plate.

[0013] A fixed guardrail is fixedly installed on the front side of the upper surface of the overhead crane movable platform. A movable guardrail corresponding to the fixed guardrail is provided on the rear side of the upper surface of the overhead crane movable platform. The movable guardrail and the upper surface of the overhead crane movable platform form a rotating structure with a limit.

[0014] A support plate is rotatably mounted on the outer rear side of the crane's movable platform. The support plate is made of high-strength steel, and a push rod is rotatably mounted on the lower surface of the support plate.

[0015] A fall protection net is rotatably installed between the support columns on the left and right sides, and the fall protection net is configured with a framed mesh structure.

[0016] Preferably, the overhead crane platform forms a lifting structure with the hydraulic telescopic rod and the support column, and a first pull rope is fixedly installed on the upper surface of the elevator. The elevator can be moved up and down using the first pull rope, thereby enabling the staff to move up and down.

[0017] Preferably, the upper end of the first pull rope is wound around a first winding wheel located on the upper surface of the fixed bracket, and the first winding wheel is driven by a first motor. The elevator forms a lifting structure between the first pull rope and the fixed bracket, and the first motor drives the first winding wheel to rotate, so that the first winding wheel winds up the first pull rope.

[0018] Preferably, a second pull rope is fixedly installed on the upper surface of the hoisting plate, and the top end of the second pull rope is wound around the outside of the second winding wheel. The rotation of the second winding wheel is used to wind up the second pull rope, thereby causing the second pull rope to drive the hoisting plate upward and realize the hoisting of the LED screen body.

[0019] Preferably, the second winding wheel is rotatably mounted on the outside of the lower surface of the traveling trolley, and a rotating shaft that is rotatably connected to the longitudinal support rod is installed through the inside of the second winding wheel. The rotating shaft is driven by a second motor, and the rotation of the rotating shaft drives the second winding wheel to rotate, thereby realizing the winding of the second pull rope.

[0020] Preferably, a limiting block with a protruding structure is fixedly installed on the outer surface of the rotating shaft, and the limiting block and the limiting groove opened on the inner side of the second winding wheel form an engaging structure. The engaging between the limiting buckle and the limiting groove allows the rotating shaft to drive the second winding wheel to rotate when it rotates.

[0021] Preferably, a linear slider is rotatably mounted at the lower end of the push rod inside the crane's movable platform, and the linear slider forms an up-and-down sliding structure with the crane's movable platform through an internally mounted adjusting screw. By adjusting the rotation of the adjusting screw, the linear slider connected to the external thread moves up and down, thereby driving the push rod.

[0022] Preferably, the adjusting screw is driven to rotate by a third motor located inside the crane's movable platform, and the third motor is electrically connected to the lower contact piece installed at the edge of the upper surface of the crane's movable platform via a wire. The state of the movable guardrail can be determined by the contact between the upper and lower contact pieces.

[0023] Preferably, the lower contact piece and the upper contact piece are in a contact sensing mode, and the upper contact piece is fixedly installed on the outer surface of the movable guardrail.

[0024] Preferably, a driven gear is coaxially fixedly installed on the side of the fall protection net, and a driving gear that is rotatably installed on the support column is meshed above the driven gear. The driving gear rotates synchronously with the rotating shaft through a transmission belt. When the rotating shaft rotates, it drives the driving gear to rotate through the transmission belt, thereby causing the driving gear to drive the driven gear that is meshed with it to rotate.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The heavy-duty overhead crane for assembling LED screens adopts a novel structural design, which allows the elevator to lift workers to the top of the crane's movable platform during use, enabling workers to stand and work on the platform. Furthermore, when against a wall, movable safety railings can be lowered to increase the overall usable area of ​​the crane's movable platform. Simultaneously, during hoisting, the anti-fall net rotates to a horizontal position, preventing the main body of the LED screen from falling directly to the ground and being damaged. The specific details are as follows:

[0026] 1. The elevator, the overhead crane platform, the first pull rope, and the first winding wheel work together. The staff can stand inside the elevator and use the rotation of the first winding wheel to wind up the first pull rope, which will cause the elevator to move the staff upward and finally transport them to the upper surface of the overhead crane platform. This facilitates the assembly of the LED screen body that has been lifted up. During the operation, fixed and movable guardrails are used to protect the staff.

[0027] 2. The movable guardrail, support plate, push rod, linear slider, and adjusting screw work together. When the movable guardrail is lowered, the upper and lower sensor plates contact each other, thereby activating the third motor to drive the adjusting screw to rotate. This causes the linear slider outside the adjusting screw to drive the push rod to rotate, ultimately rotating the support plate to a horizontal position and supporting the movable guardrail. This increases the overall area of ​​the overhead crane platform and expands the range of movement for workers.

[0028] 3. The anti-fall net, driven gear, driving gear, transmission belt and rotating shaft work together. When the rotating shaft rotates, it drives the second winding wheel to rotate. At the same time, the transmission belt drives the driving gear to rotate, which causes the driven gear, which is meshed with the driving gear, to decelerate and rotate. Finally, it drives the anti-fall net to rotate. When the main body of the LED screen moves to the top, the anti-fall net rotates to a relatively horizontal position, which can prevent the main body of the LED screen from falling directly to the ground and being damaged. Attached Figure Description

[0029] Figure 1 This is a front view structural diagram of the present invention;

[0030] Figure 2 This is a top view of the overhead crane platform of the present invention.

[0031] Figure 3 This is a three-dimensional main view structural diagram of the overhead crane moving platform of the present invention;

[0032] Figure 4 This is a side view sectional structural diagram of the overhead crane moving platform of the present invention;

[0033] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle;

[0034] Figure 6 This is a side view of the vertical structure of the anti-fall net of the present invention;

[0035] Figure 7 This is a side view of the horizontal structure of the anti-fall net of the present invention;

[0036] Figure 8 This is a schematic diagram of the three-dimensional main view structure of the support column of the present invention;

[0037] Figure 9 This is a side view cross-sectional structural diagram of the second winding wheel of the overhead crane of the present invention.

[0038] In the diagram: 1. Overhead crane platform; 2. Support column; 201. Hydraulic telescopic rod; 3. Fixed base; 4. Fixed bracket; 5. Elevator; 6. Lifting plate; 7. Fixing strap; 8. LED screen body; 9. Longitudinal support rod; 10. Transverse support rod; 11. Traveling trolley; 12. Fixed guardrail; 13. Movable guardrail; 14. Support plate; 15. Push rod; 16. Fall protection net; 17. First pull rope; 18. First winding wheel; 19. First motor; 20. Second pull rope; 21. Second winding wheel; 22. Rotating shaft; 23. Limiting block; 24. Limiting groove; 25. Second motor; 26. Linear slider; 27. Adjusting screw; 28. Third motor; 29. ​​Lower contact piece; 30. Upper contact piece; 31. Driven gear; 32. Driven gear; 33. Transmission belt. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Please see Figures 1-9 This invention provides a technical solution: a heavy-duty overhead crane for assembling LED screens, comprising a horizontally arranged crane platform 1, vertically arranged support columns 2 on the left and right sides below the crane platform 1, with a hydraulic telescopic rod 201 fixedly connected to the top of the support column 2 and a fixed base 3 with bolts fixedly installed at the lower end of the support column 2; further comprising: a fixed bracket 4, fixedly installed on the right end of the upper surface of the crane platform 1, the fixed bracket 4 having an overall "7" shape structure, and a cage-shaped elevator 5 arranged below the fixed bracket 4, with an entrance and exit door on the front outer surface of the elevator 5; and a hoisting plate 6, horizontally arranged between the crane platform 1 and the support column 2. In front of the support column 2, a fixing strap 7 is fixedly installed on the lower surface of the hoisting plate 6. Two fixing straps 7 are symmetrically arranged about the longitudinal centerline of the hoisting plate 6. The LED screen body 8 for assembly is tied to the inner side of the fixing strap 7. The longitudinal support rod 9 is fixedly installed on the outer surface of the inner side of the crane moving platform 1. Two longitudinal support rods 9 are symmetrically arranged about the left and right sides of the crane moving platform 1. A transverse support rod 10 is fixedly installed at the top of the longitudinal support rod 9. The traveling trolley 11 is installed through the outside of the transverse support rod 10. The traveling trolley 11 forms a left and right sliding structure with the transverse support rod 10 through the internal drive mechanism. The position of the traveling trolley 11 corresponds vertically to the position of the hoisting plate 6.

[0041] The overhead crane platform 1 forms a lifting structure with the support column 2 via the hydraulic telescopic rod 201. A first pull rope 17 is fixedly installed on the upper surface of the elevator 5. The upper end of the first pull rope 17 is wound around the first winding wheel 18 located on the upper surface of the fixed bracket 4. The first winding wheel 18 is driven by the first motor 19. The elevator 5 forms a lifting structure with the fixed bracket 4 via the first pull rope 17. A second pull rope 20 is fixedly installed on the upper surface of the hoisting plate 6. The top end of the second pull rope 20 is wound around the outside of the second winding wheel 21. The second winding wheel 21 is rotatably installed on the outside of the lower surface of the traveling trolley 11. A rotating shaft 22 that is rotatably connected to the longitudinal support rod 9 is installed through the inside of the second winding wheel 21. The rotating shaft 22 is driven by the second motor 25. A limit block 23 with a protruding structure is fixedly installed on the outer surface of the rotating shaft 22. The limit block 23 and the limit groove 24 opened on the inner side of the second winding wheel 21 form an engaging structure.

[0042] When using the device, first move the entire device to the wall where the curtain needs to be installed. Then, use the bolts in the fixed base 3 to fix the support column 2. After that, the staff enters the elevator 5 and uses the first motor 19 to drive the first winding wheel 18 to rotate, so that the first winding wheel 18 winds up the first pull rope 17, thereby moving the elevator 5 upward. When it reaches the highest point, the staff exits the elevator 5 and moves to the upper surface of the crane platform 1. At the same time, the second motor 25 drives the rotating shaft 22 to rotate. Under the locking action between the limit block 23 and the limit groove 24, the rotating shaft 22 drives the second winding wheel 21 to rotate, so that the second winding wheel 21 winds up the second pull rope 20. Finally, the second pull rope 20 drives the hoisting plate 6 to move upward. The hoisting plate 6 lifts the LED curtain body 8 upward and finally transports it to the upper surface of the crane platform 1. Finally, the operator removes the LED curtain body 8 and assembles it on the outside of the wall.

[0043] A fixed guardrail 12 is fixedly installed on the front side of the upper surface of the crane movable platform 1. A movable guardrail 13 corresponding to the fixed guardrail 12 is provided on the rear side of the upper surface of the crane movable platform 1. The movable guardrail 13 and the upper surface of the crane movable platform 1 form a rotating structure with a limit. A support plate 14 is rotatably installed on the outer rear side of the crane movable platform 1. The support plate 14 is made of high-strength steel, and a push rod 15 is rotatably installed on the lower surface of the support plate 14.

[0044] The lower end of the push rod 15 is rotatably mounted with a linear slider 26 located inside the crane moving platform 1. The linear slider 26 forms an up-and-down sliding structure with the crane moving platform 1 through an internally mounted adjusting screw 27. The adjusting screw 27 is driven to rotate by a third motor 28 located inside the crane moving platform 1. The third motor 28 is electrically connected to the lower contact piece 29 installed at the edge of the upper surface of the crane moving platform 1 by a wire. The lower contact piece 29 and the upper contact piece 30 are in a contact sensing mode. The upper contact piece 30 is fixedly installed on the outer surface of the movable guardrail 13.

[0045] When it is necessary to increase the activity range of staff, first rotate the movable guardrail 13 90° to a horizontal position (at this time, the top of the movable guardrail 13 is in contact with the wall). After rotating to the position, the upper contact piece 30 and the lower contact piece 29 contact to connect the power supply of the third motor 28. Then, the third motor 28 rotates to drive the adjusting screw 27 to rotate, so that the linear slider 26 with the threaded connection on the outside of the adjusting screw 27 moves upward. The linear slider 26 drives the push rod 15 to rotate, so that the push rod 15 pushes the support plate 14 to rotate upward to a horizontal position and supports the movable guardrail 13. Finally, the fallen movable guardrail 13 provides additional activity space.

[0046] The fall protection net 16 is rotatably installed between the left and right support columns 2. The fall protection net 16 is configured with a mesh structure with a frame. A driven gear 31 is coaxially fixedly installed on the side of the fall protection net 16, and a drive gear 32 rotatably installed with the support column 2 is meshed above the driven gear 31. The drive gear 32 rotates synchronously with the rotating shaft 22 through the transmission belt 33.

[0047] When the rotating shaft 22 is used to hoist the LED screen body 8, the drive belt 33 drives the drive gear 32 on the inner side of the right support column 2 to rotate. During the rotation of the drive gear 32, the driven gear 31 meshing with it will rotate. Since the diameter of the drive gear 32 is much smaller than the diameter of the driven gear 31, the driven gear 31 will rotate slowly. Finally, the driven gear 31 drives the anti-fall net 16 to rotate slowly. When the LED screen body 8 moves to the top, the anti-fall net 16 rotates to a relatively horizontal position. When the LED screen body 8 falls, it can achieve a certain buffering effect and avoid large-area damage.

[0048] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heavy-duty overhead crane for assembling LED screens, comprising a horizontally arranged crane platform, vertically arranged support columns on the left and right sides below the crane platform, a hydraulic telescopic rod fixedly connected to the crane platform at the top of each support column, and a fixed base with bolts fixedly installed at the lower end of each support column, characterized in that... Also includes: A fixed bracket is fixedly installed on the right end of the upper surface of the crane's movable platform. The fixed bracket has an overall "7" shape structure, and a cage-shaped elevator is provided below the fixed bracket. An entrance and exit are provided on the front outer surface of the elevator. A hoisting plate is horizontally positioned in front of the crane's movable platform and support column. Fixing straps are fixedly installed on the lower surface of the hoisting plate, and two fixing straps are symmetrically arranged about the longitudinal centerline of the hoisting plate. An LED screen body for assembly is tied to the inner side of the fixing straps. The longitudinal support rod is fixedly installed on the outer surface of the inner side of the crane's movable platform. Two longitudinal support rods are symmetrically arranged on the left and right sides about the crane's movable platform, and a transverse support rod is fixedly installed at the top of the longitudinal support rod. A traveling trolley is installed through the outside of the transverse support rod. The traveling trolley and the transverse support rod form a left-right sliding structure through the internal drive mechanism, and the position of the traveling trolley corresponds vertically to the position of the lifting plate. A fixed guardrail is fixedly installed on the front side of the upper surface of the overhead crane movable platform. A movable guardrail corresponding to the fixed guardrail is provided on the rear side of the upper surface of the overhead crane movable platform. The movable guardrail and the upper surface of the overhead crane movable platform form a rotating structure with a limit. A support plate is rotatably mounted on the outer rear side of the crane's movable platform. The support plate is made of high-strength steel, and a push rod is rotatably mounted on the lower surface of the support plate. A fall protection net is rotatably installed between the support columns on the left and right sides, and the fall protection net is configured with a framed mesh structure. The lower end of the push rod is rotatably mounted with a linear slider located inside the crane's movable platform. The linear slider and the crane's movable platform form an up-and-down sliding structure through an internally mounted adjusting screw. The adjusting screw is driven to rotate by a third motor located inside the crane's movable platform. The third motor is electrically connected to a lower contact piece installed at the edge of the upper surface of the crane's movable platform via a wire. The lower contact piece and the upper contact piece are in a contact-type sensing mode. The upper contact piece is fixedly installed on the outer surface of the movable guardrail. A driven gear is coaxially fixedly installed on the side of the fall protection net. A drive gear that is rotatably mounted on the support column is meshed above the driven gear. The drive gear rotates synchronously with the rotating shaft through a transmission belt.

2. The heavy-duty overhead crane for assembling LED screens according to claim 1, characterized in that: The overhead crane platform forms a lifting structure with the hydraulic telescopic rod and the support column, and a first pull rope is fixedly installed on the upper surface of the elevator.

3. The heavy-duty overhead crane for assembling LED screens according to claim 2, characterized in that: The upper end of the first pull rope is wound around a first winding wheel located on the upper surface of the fixed bracket, and the first winding wheel is driven by a first motor. The elevator forms a lifting structure with the fixed bracket through the first pull rope.

4. The heavy-duty overhead crane for assembling LED screens according to claim 1, characterized in that: A second pull rope is fixedly installed on the upper surface of the hoisting plate, and the top end of the second pull rope is wound around the outside of the second winding wheel.

5. A heavy-duty overhead crane for assembling LED screens according to claim 4, characterized in that: The second take-up reel is rotatably mounted on the outside of the lower surface of the traveling trolley, and a rotating shaft that is rotatably connected to the longitudinal support rod is installed through the inside of the second take-up reel, and the rotating shaft is driven by the second motor.

6. A heavy-duty overhead crane for assembling LED screens according to claim 5, characterized in that: A convex limiting block is fixedly installed on the outer surface of the rotating shaft, and the limiting block and the limiting groove opened on the inner side of the second winding wheel form an engaging structure.

Images