Single-drive large-stroke lifting device for outdoor LED large screen

Abstract

A single-drive large-stroke lifting device for an outdoor LED large screen relates to the technical field of performance props and comprises a mounting seat, a fixing column, a lifting column assembly, an LED screen assembly, a lifting electric push cylinder and a plurality of traction ropes. The fixing column is cylindrical and is vertically fixed in the middle of the top of the mounting seat, and the lifting electric push cylinder is arranged on the mounting seat on one side of the fixing column. The lifting column assembly comprises a plurality of sleeve type lifting columns which are sequentially an outer lifting column, a middle lifting column and an inner lifting column from outside to inside, steering wheels are arranged at the top ends of the side walls of the outer lifting column and the middle lifting column, the LED screen assembly comprises an LED screen support and an LED screen on the main view face of the LED screen support, and the LED screen support is fixedly connected with the top end of the inner lifting column. According to the lifting device, synchronous lifting of the multiple sections of lifting columns can be achieved only through one independent drive, the large-stroke lifting effect of the outdoor LED screen is achieved through stacking of all the sections with the small lifting height, and the visual effect that the outdoor LED screen needs the high height to present pictures is achieved.

Description

Technical Field

[0001] This invention relates to the field of performance props technology, and in particular to a single-drive, long-stroke lifting device for outdoor LED screens. Background Technology

[0002] Performance spaces can be divided into indoor and outdoor spaces depending on the scene. As living standards continue to improve, audiences have higher and higher requirements for performance effects. LED screens used for performances play an important role in the effect of outdoor performances.

[0003] Currently, existing technologies lack outdoor LED screen lifting devices that are simple and reliable in structure and control, and capable of achieving large-stroke lifting. Achieving large-stroke lifting often requires complex construction, necessitating multiple drives and multi-stage lifting, which is not conducive to automated control and results in high device costs. Furthermore, existing outdoor LED screens have limited application scenarios, and their position and orientation are inconvenient to adjust. Summary of the Invention

[0004] To address the above needs, this invention provides a single-drive, long-stroke lifting device for outdoor LED screens. It only requires one independent drive to achieve synchronous lifting of multiple lifting columns, using the small lifting height of each column to achieve the long-stroke lifting effect of the outdoor LED screen, thus meeting the visual requirements of outdoor LED screens for displaying images at higher heights.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A single-drive, long-stroke lifting device for outdoor LED screens includes a mounting base, a fixed column and a lifting column assembly, an LED screen assembly, a lifting electric push cylinder, and several traction ropes. The fixed column is cylindrical and vertically fixed to the top center of the mounting base. The lifting electric push cylinder is disposed on the mounting base on one side of the fixed column.

[0006] The lifting column assembly includes several sleeve-type lifting columns, which are arranged from the outside to the inside as an outer lifting column, a middle lifting column, and an inner lifting column. The outer lifting column is sleeved inside the fixed column, and a lifting hinge seat is provided at the top of the outer lifting column. The lifting hinge seat is hinged to the movable end of the lifting electric push cylinder.

[0007] The outer and middle lifting columns are equipped with steering wheels at the top of their side walls, with the rear portion of the steering wheels located inside the lifting columns. The side walls of the fixed column, the top of the side walls of the outer lifting column, the bottom of the side walls of the middle lifting column, and the bottom of the side walls of the inner lifting column are each equipped with a traction rope connecting seat. One end of a traction rope is connected to the traction rope connecting seat on the side wall of the fixed column, and the other end passes around the steering wheel of the outer lifting column and connects to the traction rope connecting seat at the bottom of the side wall of the middle lifting column. Another traction rope is connected to the traction rope connecting seat at the top of the side wall of the outer lifting column, and the other end passes around the steering wheel of the middle lifting column and connects to the traction rope connecting seat at the bottom of the side wall of the inner lifting column.

[0008] The LED screen assembly includes an LED screen bracket and an LED screen on its main viewing surface. The LED screen bracket is fixedly connected to the top of the inner lifting column. Initially, the outer lifting column, middle lifting column, and inner lifting column overlap within the fixed column, with the LED screen at its lowest position. When it needs to rise, the electric lifting cylinder operates to push the outer lifting column upwards. As the outer lifting column rises, its steering wheel also rises synchronously, thereby driving the middle lifting column upwards via a traction rope. The steering wheel on the middle lifting column also rises synchronously, thereby driving the inner lifting column upwards via a traction rope, until the LED screen reaches its highest point. When it needs to descend, the electric lifting cylinder retracts, causing the outer lifting column to descend.

[0009] Preferably, the mounting base and the LED screen bracket adopt a truss structure.

[0010] Preferably, the mounting base is equipped with a number of casters at its bottom, typically located at the four corners. A number of reinforcing diagonal braces are provided between the top of the mounting base and the fixed column to improve the stability of the fixed column.

[0011] Preferably, the fixed column, the outer lifting column, the middle lifting column, and the inner lifting column are made of rectangular tubing with decreasing dimensions.

[0012] Preferably, the mounting base is provided with a certain number of vertically insertable and removable safety pins. Each safety pin has a protruding boss at its lower end and a limiting block in the middle. A safety mounting seat is fixed to the base below the safety pin, and the safety mounting seat has a slotted through hole. The system is operated manually. After the protruding boss at the lower end of the safety pin is inserted into the slotted through hole of the safety mounting seat, rotating it 90 degrees locks the safety pin and the safety mounting seat in place. This serves to secure the mounting base, restricting its free movement and preventing tipping.

[0013] Preferably, a pull-wire encoder is provided on the side wall of the fixed column, and the lead end of the pull-wire encoder is connected to the top of the external lifting column for automated control.

[0014] Preferably, the traction rope connector is provided with a tightening bolt, and the traction rope is connected to the tightening bolt. The appropriate tension of the traction rope can be adjusted and maintained by tightening the bolt.

[0015] Preferably, the inner walls of the fixed column, the outer lifting column, and the intermediate lifting column are each provided with at least one pair of opposing lifting sliders, and the outer walls of the outer lifting column, the intermediate lifting column, and the inner lifting column are each provided with at least one pair of opposing lifting rails. The lifting sliders and lifting rails of adjacent outer and inner walls can be slidably connected vertically. The positions of the lifting sliders and lifting rails can also be interchanged.

[0016] Preferably, the LED screen bracket includes a central LED screen bracket and two side LED screen brackets on both sides. The central LED screen bracket and the two side LED screen brackets are hinged together. It also includes two electric tilting cylinders, which are hinged to tilting hinge seats at the rear of both sides of the central LED screen bracket. The movable ends of the two electric tilting cylinders are hinged to tilting hinge seats at the rear of the two side LED screen brackets. The LED screen is also divided into three parts: a central section and two side sections. The two electric tilting cylinders can rotate the two side LED screen brackets 90 degrees. When tilted forward, the side LED screens unfold to be flush with the central LED screen, suitable for large-screen displays. When tilted backward, the side LED screens retract to form a 90-degree angle with the central LED screen, suitable for multi-directional displays, and reduce space occupation when not in use.

[0017] Preferably, the traction rope is a chain, and the steering wheel is a matching sprocket.

[0018] Preferably, the number of steering wheels on the outer lifting column and the middle lifting column is one or more in parallel, and the corresponding traction rope is one or more in parallel.

[0019] Preferably, the number of intermediate lifting columns is one or more. When there are multiple intermediate lifting columns, the number of traction ropes increases accordingly. In addition to the intermediate lifting column closest to the inner lifting column, the top of the side wall of the other intermediate lifting columns is also provided with a traction rope connecting seat. This is equivalent to adding one traction rope, one steering wheel, and two traction rope connecting seats for each additional intermediate lifting column.

[0020] Preferably, there are two intermediate lifting columns. That is, the lifting column assembly has four lifting columns, which can achieve a lifting stroke of 4m to 10m.

[0021] The advantages of this invention are: 1. The device of this invention only requires one independent drive to realize the synchronous lifting of multiple sections of lifting columns. The small lifting height of each section is superimposed to achieve the large stroke lifting effect of the outdoor LED screen, which meets the visual effect of the outdoor LED screen requiring a higher height to display the picture.

[0022] 2. A single electric push rod combined with a sleeve-type lifting column achieves large-stroke lifting. The structure is simple and reliable, simplifying the automated control system, thus saving costs and reducing equipment adjustment procedures. Under the automated control of the encoder, the safety and reliability of the equipment lifting process can be guaranteed.

[0023] 3. The flip-out LED screen design can be used for single-sided widescreen display scenarios or multi-sided display scenarios, and reduces the space occupied when not in use.

[0024] 4. The position and direction of the device can be freely adjusted. The safety fixing pin, safety fixing seat and fixing column reinforced diagonal brace increase the stability and safety reliability of the entire device. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present invention (LED screen in high-position retracted state); Figure 2 This is the front view of the present invention (LED screen in high-position retracted state); Figure 3 This is the front view of the present invention (LED screen in high-position unfolded state); Figure 4 for Figure 3 Side view; Figure 5 This is the front view of the present invention (LED screen in low-position retracted state). Figure 6 for Figure 4 Enlarged view of point A in the middle; Figure 7 for Figure 4 Enlarged view of point B in the middle; Figure 8 This is a schematic diagram of the lifting principle of the present invention (low position). Figure 9 This is a schematic diagram illustrating the synchronous lifting principle of the outer lifting column and the first intermediate lifting column of the present invention. Figure 10 This is a schematic diagram illustrating the synchronous lifting principle of the first and second intermediate lifting columns of the present invention; Figure 11 This is a schematic diagram illustrating the synchronous lifting principle of the intermediate lifting column and the inner lifting column of the present invention. Figure 12 This is a top view of the LED screen assembly of the present invention (LED screen in retracted state). Figure 13 This is a rear view of the LED screen assembly of the present invention (LED screen in retracted state). Figure 14 This is a top view of the LED screen assembly of the present invention (LED screen in unfolded state). Figure 15 This is a schematic diagram showing the locking state of the safety fixing pin and the safety fixing seat of the present invention; Figure 16 This is a front view of the safety fixing pin of the present invention; Figure 17 This is a bottom view of the safety fixing pin of the present invention; Figure 18 This is a cross-sectional view of the safety fixing base of the present invention; Figure 19 This is a top view of the safety fixing base of the present invention.

[0026] Explanation of key component symbols in the diagram: 10. Mounting base; 11. Casters; 12. Reinforcing diagonal brace for fixing column; 13. Safety fixing pin; 13.1. Straight boss; 13.2. Limiting block; 14. Safety fixing base; 14.1. Straight slot through hole; 20. Fixed post; 21. Pull-wire encoder; 30. Lifting column assembly; 31. Outer lifting column; 32. Middle lifting column; 33. Inner lifting column; 34. Lifting hinge seat; 35. Steering wheel; 36. Traction rope connector; 37. Tightening bolt; 38. Lifting slider; 39. Lifting slide rail; 40. LED screen assembly; 41. LED screen bracket; 42. LED screen; 43. LED screen center bracket; 44. LED screen side bracket; 45. Hinge; 46. Tilting electric push cylinder; 47. Tilting hinge seat; 50. Lifting electric push cylinder; 60. Towing rope. Detailed Implementation

[0027] To more clearly illustrate the present invention, the invention will be further described below with reference to the accompanying drawings.

[0028] Example 1: As Figure 1-7 As shown, a single-drive long-stroke lifting device for outdoor LED screens includes a mounting base 10, a fixed column 20 and a lifting column assembly 30, an LED screen assembly 40, a lifting electric push cylinder 50 and several traction ropes 60.

[0029] The fixing column 20 is cylindrical and vertically fixed in the middle of the top of the mounting base 10, and the lifting electric push cylinder 50 is disposed on the mounting base 10 on one side of the fixing column 20.

[0030] The lifting column assembly 30 includes several sleeve-type lifting columns, which are arranged from the outside to the inside as an outer lifting column 31, a middle lifting column 32 and an inner lifting column 33. The outer lifting column 31 is sleeved inside the fixed column 20. The top of the outer lifting column 31 is provided with a lifting hinge seat 34, which is hinged to the movable end of the lifting electric push cylinder 50.

[0031] The outer lifting column 31 and the middle lifting column 32 are provided with steering wheels 35 at the top of their side walls. The rear part of the steering wheels 35 is located inside the lifting column. The side walls of the fixed column 20, the top of the side walls of the outer lifting column 31, the bottom of the side walls of the middle lifting column 32, and the bottom of the side walls of the inner lifting column 33 are respectively provided with traction rope connecting seats 36. One end of a traction rope 60 is connected to the traction rope connecting seat 36 on the side wall of the fixed column 20, and the other end passes around the steering wheel 35 of the outer lifting column 31 and connects to the traction rope connecting seat 36 at the bottom of the side wall of the middle lifting column 32. Another traction rope 60 is connected to the traction rope connecting seat 36 at the top of the side wall of the outer lifting column 31, and the other end passes around the steering wheel 35 of the middle lifting column 32 and connects to the traction rope connecting seat 36 at the bottom of the side wall of the inner lifting column 33.

[0032] Combination Figure 12-13 As shown, the LED screen assembly 40 includes an LED screen bracket 41 and an LED screen 42 on its main viewing surface. The LED screen bracket 41 is fixedly connected to the top of the inner lifting column 33.

[0033] The fixed column 20, the outer lifting column 31, the middle lifting column 32, and the inner lifting column 33 are made of rectangular tubing with decreasing dimensions.

[0034] Example 2: Combination Figure 1-5 As shown, based on Embodiment 1, the bottom of the mounting base 10 is provided with a certain number of casters 11, and the top of the mounting base 10 is provided with a certain number of fixed column reinforcing braces 12.

[0035] Example 3: Combination Figure 15-19 As shown, based on Embodiment 1 or Embodiment 2, the mounting base 10 is provided with a certain number of vertically insertable and removable safety fixing pins 13. The lower end of the safety fixing pin 13 is provided with a protruding boss 13.1, and the middle part is provided with a limiting block 13.2. A safety fixing seat 14 is fixed on the base below the safety fixing pin 13. The safety fixing seat 14 is provided with a slotted through hole 14.1.

[0036] Example 4: Combination Figure 3As shown, based on Embodiment 1, Embodiment 2, or Embodiment 3, a pull-wire encoder 21 is provided on the side wall of the fixed column 20, and the lead end of the pull-wire encoder 21 is connected to the top of the outer lifting column 31.

[0037] Example 5: Combination Figure 6-7 As shown, based on the above embodiment, the traction rope connecting seat 36 is provided with a tightening bolt 37, and the traction rope 60 is connected to the tightening bolt 37.

[0038] The inner walls of the fixed column 20, the outer lifting column 31, and the middle lifting column 32 are each provided with at least one pair of lifting sliders 38 arranged opposite each other, and the outer walls of the outer lifting column 31, the middle lifting column 32, and the inner lifting column 33 are each provided with at least one pair of lifting rails 39 arranged opposite each other.

[0039] Example 6: Combination Figure 12-14 As shown, based on the above embodiment, the LED screen bracket 41 includes an LED screen middle bracket 43 and two LED screen side brackets 44 on both sides. The LED screen middle bracket 43 and the two LED screen side brackets 44 are respectively hinged by hinges 45. It also includes two flip electric push cylinders 46. The two flip electric push cylinders 46 are respectively hinged to the flip hinge seats 47 at the rear of both sides of the LED screen middle bracket 43. The movable ends of the two flip electric push cylinders 46 are respectively hinged to the flip hinge seats 47 at the rear of the two LED screen side brackets 44.

[0040] Example 7: Combination Figure 6-7 As shown, based on the above embodiment, the traction rope 60 is a chain, and the steering wheel 35 is a matching sprocket. The number of steering wheels 35 on the outer lifting column 31 and the middle lifting column 32 is one or multiple wheels arranged side by side.

[0041] Example 8: Combination Figure 1-4 and Figure 8 As shown, based on the above embodiment, the number of intermediate lifting columns 32 is one or more. When there are multiple intermediate lifting columns (two in the figure), the number of traction ropes 60 increases accordingly. In addition to the intermediate lifting column 32 closest to the inner lifting column 33, the top of the side wall of the other intermediate lifting columns 32 is also provided with a traction rope connecting seat 36.

[0042] Taking the two intermediate lifting columns 32 as an example, the working principle is as follows: Combination Figure 5 and Figure 8 As shown (where, for clarity of illustration, ...), Figure 8(The initial positions of each lifting column are staggered as shown in the diagram). This represents the initial state of the LED screen 42 in its low-position retracted state. The lifting electric cylinder 50 is activated, and the outer lifting column 31 rises under the lifting action. Simultaneously, one end of a traction rope 60 is connected to the traction rope connecting seat 36 of the fixed column 20, and the other end passes around the steering wheel 35 of the outer lifting column 31 and connects to the traction rope connecting seat 36 of the first intermediate lifting column 32. The rising of the outer lifting column 31 and its steering wheel 35 will pull the first intermediate lifting column 32 upwards synchronously via the traction rope 60. Figure 9 As shown. Similarly, the rise of the first intermediate lifting column 32 will pull the second intermediate lifting column 32 to rise synchronously via the traction rope 60, as shown. Figure 10 As shown, the rise of the second intermediate lifting column 32 will cause the inner lifting column 33 to rise synchronously via the traction rope 60, as... Figure 11 As shown, until the LED screen 42 reaches the required height.

[0043] Combination Figure 12-14 As shown, after all the lifting columns have completed their raising and lowering, the left LED screen 42 rotates 90 degrees under the action of the left-side tilting electric push cylinder 46, becoming flush with the middle LED screen 42. Similarly, the right LED screen 42 rotates 90 degrees under the action of the right-side tilting electric push cylinder 46, becoming flush with the middle LED screen 42, for use in large-screen display scenarios. When used for multi-directional display scenarios, the tilting electric push cylinder 46 controls the LED screens 42 on both sides to retract to an angle of 90 degrees or less than 90 degrees with the middle LED screen 42, increasing the display range.

[0044] When the device is not in use, the lifting electric push cylinder 50 retracts, causing the outer lifting column 31 to descend until the outer lifting column 31, the two intermediate lifting columns 32 and the inner lifting column 33 overlap and are located inside the fixed column 20. The LED screen 42 is at its lowest position, and the LED screens 42 on both sides retract to form a 90-degree angle with the middle LED screen 42, reducing the space occupied.

[0045] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used in similar products. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the patent scope of the present invention.

Claims

1. A single-drive, long-stroke lifting device for outdoor LED screens, characterized in that: Includes mounting base (10), fixed column (20) and lifting column assembly (30), LED screen assembly (40), one lifting electric push cylinder (50) and several traction ropes (60); The fixed column (20) is cylindrical and is vertically fixed in the middle of the top of the mounting base (10). The lifting electric push cylinder (50) is set on the mounting base (10) on one side of the fixed column (20). The lifting column assembly (30) includes several sleeve-type lifting columns, which are arranged from the outside to the inside as an outer lifting column (31), a middle lifting column (32) and an inner lifting column (33). The outer lifting column (31) is sleeved inside the fixed column (20). The top of the outer lifting column (31) is provided with a lifting hinge seat (34), which is hinged to the movable end of the lifting electric push cylinder (50). The outer lifting column (31) and the middle lifting column (32) are provided with steering wheels (35) at the top of their side walls. The rear part of the steering wheels (35) is located inside the lifting column. The side walls of the fixed column (20), the top of the side walls of the outer lifting column (31), the bottom of the side walls of the middle lifting column (32), and the bottom of the side walls of the inner lifting column (33) are respectively provided with traction rope connecting seats (36). One end of a traction rope (60) is connected to the traction rope connecting seat (36) on the side wall of the fixed column (20), and the other end passes around the steering wheel (35) of the outer lifting column (31) and is connected to the traction rope connecting seat (36) at the bottom of the side wall of the middle lifting column (32). One end of a traction rope (60) is connected to the traction rope connecting seat (36) at the top of the side wall of the outer lifting column (31), and the other end passes around the steering wheel (35) of the middle lifting column (32) and is connected to the traction rope connecting seat (36) at the bottom of the side wall of the inner lifting column (33). The LED screen assembly (40) includes an LED screen bracket (41) and an LED screen (42) on its main viewing surface. The LED screen bracket (41) is fixedly connected to the top of the inner lifting column (33).

2. The single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The mounting base (10) is provided with a certain number of casters (11) at the bottom, and a certain number of fixed column reinforcing braces (12) are provided between the top of the mounting base (10) and the fixed column (20).

3. The single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The fixed column (20), the outer lifting column (31), the middle lifting column (32), and the inner lifting column (33) are made of rectangular tubing with decreasing dimensions.

4. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The mounting base (10) is provided with a certain number of vertically insertable safety fixing pins (13). The lower end of the safety fixing pin (13) is provided with a protruding boss (13.1) and the middle is provided with a limiting block (13.2). A safety fixing seat (14) is fixed on the base below the safety fixing pin (13). A slotted through hole (14.1) is provided on the safety fixing seat (14).

5. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: A pull-wire encoder (21) is provided on the side wall of the fixed column (20), and the lead end of the pull-wire encoder (21) is connected to the top of the outer lifting column (31).

6. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The traction rope connector (36) is provided with a tightening bolt (37), and the traction rope (60) is connected to the tightening bolt (37).

7. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The inner wall of the fixed column (20), the inner wall of the outer lifting column (31) and the inner wall of the intermediate lifting column (32) are respectively provided with at least one pair of lifting sliders (38) arranged opposite to each other. The outer wall of the outer lifting column (31), the outer wall of the intermediate lifting column (32) and the outer wall of the inner lifting column (33) are respectively provided with at least one pair of lifting rails (39) arranged opposite to each other.

8. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The LED screen bracket (41) includes an LED screen middle bracket (43) and two LED screen side brackets (44) on both sides. The LED screen middle bracket (43) and the two LED screen side brackets (44) are respectively hinged by hinges (45). It also includes two flip electric push cylinders (46). The two flip electric push cylinders (46) are respectively hinged to the flip hinge seats (47) at the rear of both sides of the LED screen middle bracket (43). The movable ends of the two flip electric push cylinders (46) are respectively hinged to the flip hinge seats (47) at the rear of the two LED screen side brackets (44).

9. A single-drive, long-stroke lifting device for outdoor LED screens according to claim 1, characterized in that: The traction rope (60) is a chain, and the steering wheel (35) is a matching sprocket; The number of steering wheels (35) on the outer lifting column (31) and the middle lifting column (32) is one or multiple in a row.

10. A single-drive, long-stroke lifting device for outdoor LED screens according to any one of claims 1-9, characterized in that: The number of intermediate lifting columns (32) is one or more. When there are multiple intermediate lifting columns (32), the number of traction ropes (60) increases accordingly. In addition to the intermediate lifting column (32) closest to the inner lifting column (33), the top of the side wall of the other intermediate lifting columns (32) is also provided with traction rope connecting seats (36).

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