A large-size display screen lifting device and method

Abstract

This application relates to a lifting device and method for a large-size display screen. The lifting device includes a cable entry frame, horizontally slidably mounted on a frame; a cable entry drive assembly connected to the cable entry frame; a swing frame, hinged to the cable entry frame, which, through movement of the cable entry frame, has a cable entry position and a cable exit position. The swing frame has a support arm, which, in the cable entry position, enters a lifting slot; a positioning assembly for fixing the display screen to the swing frame; a lifting rod, circularly mounted on the frame, with its circular motion centerline coaxial with the hinge axis of the swing frame in the cable entry position, and the lifting rod abutting against the lower side of the support arm; and a lifting drive assembly including a lifting actuator connected to the lifting rod, the lifting actuator having a pushing execution section, which causes the lifting drive assembly to move the lifting rod in a circular motion via a non-rotational axis. This application achieves efficient, large-angle lifting of a large-size display screen using a simple structure.

Description

Technical Field

[0001] This application relates to the field of display screen transport equipment, and in particular to a lifting device and method for a large-size display screen. Background Technology

[0002] In the production lines of display devices (such as LCD TVs and OLED TVs), it is often necessary to change large-sized display devices from a horizontal transport posture to an inclined posture. This process requires smooth operation, precise positioning, and absolute protection of the equipment itself (especially the fragile screen) from the risk of impact, vibration, or accidental drop during the conversion.

[0003] In related technologies, the display screen is placed on a tooling plate, which moves forward via a conveyor line to transfer to different workstations. The tooling plate is equipped with a lifting bracket, which consists of a base frame and a swing frame. The base frame is fixedly mounted on the upper surface of the tooling plate, and one end of the swing frame is hinged to the base frame. The side of the swing frame away from the tooling plate is where the display screen is placed. When the swing frame moves away from the upper surface of the tooling plate, the product can be changed from a horizontal posture to a tilted posture.

[0004] The power mechanism for moving the swing frame can be implemented in two ways. First, a cylinder is directly mounted on the tooling plate. The end of the cylinder housing away from the piston rod is hinged to the tooling plate, and the end of the piston rod is hinged to the lower side of the swing frame. The extension and retraction of the piston rod moves the swing frame away from the tooling plate, thus changing the product from a horizontal to a tilted position. The drawback of this method is that the tooling plate needs an external power source to drive the cylinder, and because the cylinder needs to be housed between the base frame and the swing frame, the maximum tilt angle of the swing frame is difficult to exceed 45°.

[0005] The second method involves installing a boom and a linear module at a fixed position on the conveyor line. The upper end of the boom is hinged, and the lower end abuts against the side of the swing frame near the abutment. The linear module is fixedly installed, and its output end moves horizontally, abutting against the side of the boom away from the swing frame. The drawback of this method is that as the tilt angle of the swing frame increases, the conversion rate between the output force of the linear module and the output force of the boom decreases. Therefore, the maximum tilt angle of the swing frame is difficult to exceed 70°, and it is also difficult to adapt to large-size and heavy displays.

[0006] In addition, since each display screen requires a tooling plate, and a return connection device is also required at the end of the conveyor line to allow the tooling plate that has moved to the end to flow back to the front of the conveyor line, the equipment costs involved in the display screen production process are relatively high. Summary of the Invention

[0007] In order to achieve efficient and wide-angle lifting of large-size displays with a simple structure, this application provides a lifting device and method for large-size displays.

[0008] Firstly, this application provides a large-size display screen lifting device, which adopts the following technical solution:

[0009] A large-size display screen lifting device includes:

[0010] frame;

[0011] The cable tray is horizontally slidably mounted on the frame.

[0012] The cable entry drive assembly is connected to the cable entry frame;

[0013] A swing frame is hinged to the wire inlet frame. The movement of the wire inlet frame allows the swing frame to have a wire inlet position and a wire release position. The swing frame has a support arm. In the wire inlet position, the support arm enters the lifting through groove.

[0014] A positioning component is provided on the swing frame to fix the display screen on the swing frame;

[0015] A lifting rod is mounted on the frame in a circular motion. The center line of the circular motion of the lifting rod is coaxial with the hinge axis of the swing frame when the line is in the input position. The lifting rod abuts against the lower side of the support arm.

[0016] The lifting drive assembly includes a lifting actuator connected to the lifting rod. The lifting actuator has a pushing execution section that extends in an arc shape. The pushing execution section is arranged to coincide with the movement path of the lifting rod. The pushing execution section causes the lifting drive assembly to make the lifting rod perform a circular motion through a non-rotating axis linear motion.

[0017] By adopting the above technical solution, firstly, with the support arm on the swing frame, only spaced pillow blocks are needed on the circulating conveyor line to raise the display screen. This design eliminates the need for complex tooling plates, significant modifications to the conveyor line, and even return connection devices, thereby reducing equipment costs involved in display screen production. Secondly, the lifting rod raises the swing frame through circular motion, and the pushing execution section extends in an arc shape. This design ensures that the force applied to the lifting rod and the force applied to the support arm are in the same direction, without vector decomposition, resulting in high mechanical efficiency and enabling rapid, large-angle lifting of large-size display screens. Thirdly, because the lifting drive component uses a non-rotating axis direct motion, it remains in a fixed position when the swing frame is raised, without needing to follow the swing frame's movement. This minimizes the space required in the production workshop and reduces the need for extensive clearance space for this device. Fourth, after the swing frame lifts the display screen, the circulating conveyor line can still move forward, which can make the working cycle between two adjacent display screens more compact.

[0018] Preferably, the swing frame further includes a connecting beam, which is hinged to the cable tray, and the connecting beam is used to connect the end of the support arm near the hinge; the support arm is square tube shaped, the long side of the support arm abuts against the display screen, and the end of the support arm away from the connecting beam is provided with a clamping window.

[0019] The positioning assembly includes a baffle, a clamping cylinder, a clamping block, and a self-ejecting block. The baffle is disposed on the connecting beam and abuts against the end of the display screen near the connecting beam. The clamping cylinder is a pen-shaped cylinder disposed inside the support arm and extends along the length of the support arm. The clamping block is movably disposed on the piston rod of the clamping cylinder, allowing it to extend or retract from the clamping window. The clamping block extending outside the clamping window abuts against the end of the display screen away from the connecting beam. The self-ejecting block is connected to both the clamping block and the piston rod of the clamping cylinder, and is used to generate a force that moves the clamping block out of the clamping window when the clamping cylinder disengages the clamping block from the surface of the display screen.

[0020] The support arm and the baffle are provided with protective pads made of elastic material at the positions where they abut against the display screen. Along the conveying direction of the circulating conveyor line, the thickness of the protective pads first becomes thinner and then thicker.

[0021] By adopting the above technical solution, firstly, during the process of the swing frame moving from the wire-off position to the wire-in position, the support arm gradually enters the lifting channel. At this time, the display screen will press down on the clamping block to prevent the clamping block from moving out of the clamping window. After the clamping block exceeds the range of the display screen, the clamping block will move out of the clamping window under the action of the self-exiting block. Therefore, the retraction and extension of the clamping block can be achieved without an additional power source. At the same time, after the swing frame is raised to a certain angle, the display screen slides down and abuts against the baffle. Finally, the clamping block abuts against the end of the display screen away from the baffle, thus achieving the clamping and fixing of the display screen. In addition, because a pen-shaped cylinder is used to drive the movement of the clamping block, and the force applied by the pen-shaped cylinder is small, the force generated by the pen-shaped cylinder when the clamping block hits the display screen will not damage the display screen, and the piston rod of the pen-shaped cylinder cannot continue to retract. Therefore, a simple structure can be used to clamp display screens of different sizes. In summary, the components related to display screen clamping and positioning are relatively simple, without excessively increasing the structural complexity and weight of the swing frame.

[0022] Secondly, due to the square tube shape of the support arm, its inner cavity can accommodate the clamping cylinder, clamping blocks, and self-ejecting components. Simultaneously, the long side of the support arm abuts against the display screen, meaning a larger side area is in contact with the screen. This makes the equipment structure more compact and allows the support arm to more stably support the display screen. This increased stability refers to the larger contact area between the support arm and the display screen. Furthermore, for the same weight, a hollow structure has a higher bending section modulus than a solid rod, achieving the characteristics of being "lighter and stronger." Additionally, the large contact area between the support arm and the display screen provides a larger mounting surface for other components. Moreover, the structural forms of both the support arm and the connecting beam are relatively simple, allowing for assembly using standard parts or simple non-standard parts to simplify assembly.

[0023] Thirdly, the protective pad can protect the display screen. At the same time, based on the change in the thickness of the protective pad, the display screen can also be positioned along the conveying direction of the circulating conveyor line. Combined with the clamps and baffles, the display screen can be positioned in four directions. Therefore, the position of the display screen will not shift significantly during the subsequent lifting process of the swing frame, making it easier for the subsequent handling equipment to remove the display screen.

[0024] In summary, the simple and easy-to-assemble structure enables precise clamping and positioning of the display screen, and also allows it to support large-sized display screens.

[0025] Preferably, the plurality of support arms are divided into two groups, with the plurality of support arms in one group being equally spaced, and a clearance area is formed between the two groups of support arms, the clearance area accommodating components on the display screen that interfere with the support arms; between the two groups of support arms, the two closest support arms are each provided with the clamping cylinder, the clamping block and the self-ejecting block.

[0026] By adopting the above technical solution, the two clamping cylinders located in the middle can be adapted to the clamping and positioning of displays of different sizes. The structure related to clamping and positioning is further simplified, and the wiring of the clamping cylinders can be simplified. Specifically, after the wires connected to the clamping cylinders come out from the end of the support arm near the connecting beam, the two wires can be collected from the middle and then guided to the drag chain on the edge to maintain the simplicity of the layout of various wiring structures in the equipment.

[0027] Preferably, the wire entry drive assembly includes a wire entry motor, a wire entry actuator, and a wire entry transmission component. The wire entry motor is fixedly installed and is a brake motor. The wire entry actuator is a belt linear module, and there are two wire entry actuators. One side of the belt of the wire entry actuator is connected to the wire entry frame. The pulley distance between the two pulleys in one wire entry actuator is variable, which allows the belt tension of the wire entry actuator to be changed. The wire entry transmission component connects one wire entry motor and two wire entry actuators respectively, and the wire entry transmission component is a chain drive.

[0028] By adopting the above technical solution, since the swing frame is light to medium load and needs to be compatible with a large-size display screen, a structure of brake motor + chain drive + belt linear module is used to drive the line entry frame to move in order to improve the working cycle and consider safety and economy. This design has several advantages: First, the chain drive provides highly reliable power transmission, while the belt linear module is very suitable for long-stroke light to medium load conveying movements. The belt linear module also has high-speed conveying characteristics, low inertia, and natural buffering characteristics. Based on this, the line entry frame can move slowly first, then at high speed, and then slowly again to transfer from the line exit position to the line entry position, thereby improving the working cycle while maintaining safe transmission. Second, the chain drive has a flexible layout and does not need to be strictly coaxial with the drive shaft of the belt linear module, thus maintaining the simplicity of the equipment structure. Third, in the line entry actuator, the pulley spacing is adjustable, which can change the belt tension. Changes in belt tension will change the buffering capacity, and thus change the working cycle adapted to the belt linear module.

[0029] Preferably, there is a hinge seat and a hinge shaft between the inlet frame and the swing frame. The hinge seat is fixedly mounted on the inlet frame. There are two hinge seats, located at both ends of the inlet frame along the conveying direction of the circulating conveyor line. The hinge shaft is fixedly mounted on the connecting beam, and one hinge shaft is rotatably inserted into one of the hinge seats.

[0030] A linear guide rail is provided between the inlet frame and the machine frame. Along the conveying direction of the circulating conveyor line, the linear guide rail is arranged at both ends of the inlet frame. The linear guide rail is located inside the two hinge seats, so that the inlet frame resists the bending moment applied by the swing frame.

[0031] By adopting the above technical solution, firstly, the two hinge seats form a "wide base" structure. This structure can better resist lateral tilting moments, ensuring the stability of the swing frame during lifting. It also maximizes the lever arm between the lifting rod and the hinge, allowing for the lifting of larger displays with less force, reducing the workload on the lifting drive components, and even distributing the load evenly across the swing frame, thus reducing internal stress in the connecting beam. Secondly, the linear guide rail, hinge seats, and the projection of the hinge seats onto the plane of the linear guide rail are arranged in a right-angled triangle. The linear guide rail can balance the inward and downward force exerted by the hinge shaft on the hinge seats, resisting the bending moment exerted by the swing frame on the cable tray, thereby improving the overall strength and rigidity of the device and extending its service life.

[0032] Preferably, along the conveying direction of the circulating conveyor line, the input actuator is located inside the linear guide rail, the distance between the two input actuators is 60%-80% of the distance between the two hinge seats, and the linear guide rail is located at the exact center between the hinge seat and the input actuator, or the linear guide rail is closer to the hinge seat.

[0033] By adopting the above technical solutions, firstly, the special setting of the spacing between the input actuators prevents both excessively small spacing (leading to poor transmission stability) and excessively large spacing (leading to excessive load on the input transmission components). This ensures that the input transmission components achieve rigidity and precise synchronization while providing the input frame with optimal transmission force and stability. Secondly, if the linear guide is located precisely between the hinge seat and the input actuator, both the lateral forces exerted by the linear guide on the input frame and the lateral forces exerted by the swing frame on the input frame are kept at a controllable and low level, improving the smoothness of the input frame's movement. Thirdly, if the linear guide is closer to the hinge seat, more space can be provided for the installation of the input actuators, while also strengthening the torsional resistance of the input frame.

[0034] Preferably, the frame is provided with a pusher track plate, the pusher track plate extends along an arc, the pusher track plate is provided with a pusher track groove that extends synchronously with itself, and the pusher track groove is open at both ends along the extension direction;

[0035] The lifting actuator includes an actuator sprocket and an actuator chain. The actuator sprocket is rotatably mounted on the frame, and the actuator chain is sleeved on the actuator sprocket. One side of the actuator chain passes through the push track groove to form the push execution section. The actuator chain in the push track groove is connected to the lifting rod.

[0036] The lifting rod is connected to a limiting wheel at its end, and the limiting wheel is provided with a limiting groove on its outer circumferential side wall, which is used for the push track plate to be embedded.

[0037] The lifting drive assembly also includes a lifting motor and a lifting transmission component. The lifting motor is fixedly installed and is a brake motor. The lifting transmission component is a chain drive and connects the lifting motor and the lifting actuator respectively.

[0038] By adopting the above technical solution, firstly, the transmission structure formed by the actuator chain and the jacking track groove is an arc-shaped extension. This transmission structure can transmit power and provide a static track structure, thus making it easier to form a high-precision transmission path. Secondly, since the jacking track groove cannot restrict the horizontal movement of the actuator chain, a limit wheel is used to limit the amplitude of the actuator chain's horizontal movement, thereby improving motion stability and accuracy, while also significantly reducing abnormal wear and extending service life. Thirdly, chain drive provides high efficiency, high rigidity, flexible layout, and economy, and realizes rapid and precise circular motion of the lifting block. The brake motor compensates for the lack of self-locking characteristic of chain drive, thus achieving both efficient and stable transmission and comprehensive safety protection.

[0039] Preferably, both ends of the lifting rod are fitted with the push track plate and the lifting actuator. Each lifting actuator has three actuator sprockets arranged in a right-angled triangle. The three actuator sprockets are a drive sprocket, an intermediate sprocket, and an adjusting sprocket. The drive sprocket is rotatably mounted on the frame and located at the lower end of the push track plate. The drive sprocket is connected to the lifting transmission component. The intermediate sprocket is rotatably mounted on the frame and located on the outer arc of the push track plate. The adjusting sprocket is located at the upper end of the push track plate. An adjusting slide is provided between the adjusting sprocket and the frame. The adjusting slide allows the adjusting sprocket to rotate and slides towards or away from the intermediate sprocket.

[0040] By adopting the above technical solution, firstly, since only one push track groove on the push track plate is needed to form a push execution section on one side of the execution chain, when the three execution sprockets are distributed in a right-angled triangle, it is only necessary to bend the execution chain at the hypotenuse into an arc shape. Therefore, fewer execution sprockets are used to form the required push execution section, further simplifying the structure of the device. Secondly, compared to the case where multiple actuator sprockets are arranged in an arc, when adjusting the actuator sprocket at the top of the pusher track plate to change the tension of the actuator chain, all actuator sprockets except the bottom one connected to the lifting transmission component need to be moved. This makes it difficult to control the tension adjustment of the actuator chain and the adjustment work is very complicated. In this design, the three actuator sprockets are arranged in a right-angled triangle. The tension of the actuator chain can be changed simply by moving the sprocket closer to or further away from the middle sprocket. At the same time, since the adjusting sprocket is the driven wheel and is located at the top, there is enough space to operate the adjusting sprocket, and the tension adjustment can be achieved simply by moving the adjusting sprocket. In fact, moving the adjusting sprocket is even easier.

[0041] Preferably, the actuating chain located in the pusher track groove is also connected to a stop bar, the stop bar is located above the lifting rod, the distance between the stop bar and the lifting rod is greater than the thickness of the support arm, the lifting rod is provided with a shock-absorbing sleeve, and the shock-absorbing sleeve abuts against the lower side of the support arm.

[0042] By adopting the above technical solution, firstly, since the lifting rod will vibrate at the moment of starting and stopping, a shock-absorbing sleeve and a stop bar will be configured to limit the vibration amplitude of the display screen and prevent scratches on the display screen; secondly, when the lifting rod is stationary, the cable entry frame can be slightly moved to change the angle of the swing frame, so as to fine-tune the posture of the display screen to meet more working conditions, such as meeting different manual operation angles and adapting to the manufacturing tolerances of the display screen.

[0043] Secondly, this application provides a method for lifting a large-size display screen, which adopts the following technical solution:

[0044] A method for lifting a large-size display screen includes the following steps:

[0045] S1. After the circulating conveyor line transfers the display screen to the predetermined station, the swing frame is moved from the de-wire position to the in-wire position by the in-wire drive component, so that the support arm enters the lifting channel.

[0046] S2; The swing frame is swung upward by lifting the drive assembly, and stops moving when the display screen slides down and touches the baffle.

[0047] S3. Make the clamping block abut against the end of the display screen away from the baffle to complete the clamping and fixing of the display screen on the swing frame;

[0048] S4. The swing frame continues to swing upward by lifting the drive assembly until the tilt angle of the swing frame reaches the predetermined value.

[0049] By adopting the above technical solution, it is possible to lift large-size displays at high speed and at large angles without significantly modifying the conveyor line.

[0050] In summary, this application includes at least one of the following beneficial technical effects:

[0051] 1. Based on the simplicity of the swing frame structure, the swing frame is light to medium load-bearing. The weight of the swing frame and the display screen is not too heavy. It can support a large-size display screen while simultaneously and can quickly, stably, safely and adaptably transport swing frames with different loads horizontally through a simple transmission connection structure. It can also lift a large-size display screen at high speed, stably and safely through a simple transmission connection structure. Attached Figure Description

[0052] Figure 1 This is a schematic diagram illustrating the cooperative relationship between the swing frame and the circulating conveyor line when the infeed frame is in the de-wire position, as shown in the embodiments of this application.

[0053] Figure 2 This is a schematic diagram illustrating the cooperative relationship between the swing frame and the circulating conveyor line when the inlet frame is in the inlet position, as shown in the embodiments of this application.

[0054] Figure 3 This is a schematic diagram of the overall structure of the large-size display screen lifting device in the embodiments of this application.

[0055] Figure 4 This is a schematic diagram in the embodiments of this application to illustrate the structure of the lifting rod using a direct motion of a rotating shaft (where (a) is the lifting rod connected to a U-shaped rod, and (b) is the lifting rod connected to a V-shaped rod).

[0056] Figure 5 This is a schematic diagram illustrating the cooperation between the clamping block and the baffle in the positioning component in the embodiments of this application.

[0057] Figure 6 This is a schematic diagram illustrating the specific structure of the positioning component in the inner cavity of the support arm in the embodiments of this application.

[0058] Figure 7 This is a schematic diagram illustrating the specific structure of the input line drive component in the embodiments of this application.

[0059] Figure 8 This is a schematic diagram illustrating the spatial layout relationship between a hinged seat and a linear guide rail in an embodiment of this application.

[0060] Figure 9 This is a schematic diagram illustrating the spatial arrangement between a hinged seat and two linear guides in an embodiment of this application.

[0061] Figure 10 This is a schematic diagram illustrating the spatial arrangement between a hinged seat and three linear guides in an embodiment of this application.

[0062] Figure 11 This is a schematic diagram illustrating the specific structure of the lifting drive component in the embodiments of this application.

[0063] Figure 12 This is a schematic diagram illustrating the connection structure between the lifting rod and the actuation chain in an embodiment of this application.

[0064] Figure 13 This is a schematic diagram illustrating the cooperation structure between the adjusting sprocket and the frame in the embodiments of this application.

[0065] Explanation of reference numerals in the attached drawings: 1. Frame; 11. Protective pad; 12. Pushing track plate; 13. Pushing track groove; 14. Adjusting wheel slide; 15. Adjusting wheel bolt; 2. Cable entry frame; 21. Hinge seat; 22. Linear guide rail; 3. Cable entry drive assembly; 31. Cable entry motor; 32. Cable entry actuator; 33. Cable entry transmission component; 4. Swing frame; 41. Support arm; 411. Clamping window; 412. Clearance area; 42. Connecting beam; 421. Hinge shaft; 5. Positioning assembly; 51. Baffle; 52. Clamping cylinder; 5 3. Clamping block; 531. Adapter frame; 54. Self-exiting block; 6. Lifting rod; 61. Limiting wheel; 611. Limiting groove; 62. Stop bar; 63. Shock absorber sleeve; 64. Linkage seat; 7. Lifting drive assembly; 71. Lifting actuator; 711. Actuating sprocket; 7111. Drive sprocket; 7112. Intermediate sprocket; 7113. Adjusting sprocket; 712. Actuating chain; 72. Lifting motor; 73. Lifting transmission component; 8. Pushing actuator section; 9. Circulating conveyor line; 91. Lifting through groove; 92. Pillow block. Detailed Implementation

[0066] The following is in conjunction with the appendix Figures 1-13 This application will be described in further detail.

[0067] This application discloses a large-size display screen lifting device.

[0068] Reference Figure 1 and Figure 2The large-size display screen lifting device needs to be compatible with a circulating conveyor line 9 having a lifting channel 91. The circulating conveyor line 9 includes both chain conveyors and belt conveyors, meaning it is a linear conveyor line that does not require additional tooling plates or return connection devices. The lifting channel 91 consists of multiple elastic material pillows 92 spaced apart on the conveying surface of the circulating conveyor line 9. The materials include, but are not limited to, silicone and EVA. The upper surface of the pillows 92 is used to support the display screen, and the gaps between the pillows 92 constitute the lifting channel 91.

[0069] In other embodiments, the lifting channel 91 can also be a support mounted on the display screen, and after the display screen is placed on the conveying surface of the circulating conveyor line 9, the support and the conveying surface form a lifting channel 91.

[0070] Reference Figure 1 , Figure 2 and Figure 3 The large-size display screen lifting device includes a frame 1, a cable entry frame 2, a cable entry drive assembly 3, a swing frame 4, a positioning assembly 5, a lifting rod 6, and a lifting drive assembly 7. The frame 1 is divided into two parts depending on whether its horizontal position coincides with the circulating conveyor line 9: one part coincides with the circulating conveyor line 9, and the other part is adjacent to and outside the circulating conveyor line 9. The cable entry frame 2 is horizontally slidably positioned on the frame 1 at a position not coinciding with the circulating conveyor line 9, and the conveying direction of the cable entry frame 2 is perpendicular to the conveying direction of the circulating conveyor line 9. The cable entry drive assembly 3 is mounted on the frame 1 and connected to the cable entry frame 2. The cable entry drive assembly 3 is used to move the cable entry frame 2 closer to or further away from the circulating conveyor line 9.

[0071] Reference Figure 1 , Figure 2 and Figure 3 The swing frame 4 is hinged to the inlet frame 2, with the hinge axis 421 parallel to the conveying direction of the circulating conveyor line 9. The swing frame 4, through the movement of the inlet frame 2, has an inlet position and a outlet position. The swing frame 4 also has a support arm 41. At the inlet position, the swing frame 4 enters the location of the circulating conveyor line 9, allowing the support arm 41 to enter the lifting channel 91. This ensures that the support arm 41 can contact the display screen during subsequent lifting. At the outlet position, the swing frame 4 is outside the circulating conveyor line 9, allowing the support arm 41 to leave the lifting channel 91, thus avoiding interference with the normal conveying of the circulating conveyor line 9. A positioning component 5 is mounted on the swing frame 4 to fix the display screen to the swing frame 4, ensuring the display screen is in a stable position before lifting.

[0072] Reference Figure 2 and Figure 3The lifting rod 6 is circularly mounted on the frame 1, and is located above the circulating conveyor line 9. Here, "above" means that the projection of the lifting rod 6 on the horizontal plane coincides with the circulating conveyor line 9 most of the time. The center line of the circular motion of the lifting rod 6 is coaxial with the hinge axis 421 of the swing frame 4 when it is in the inlet position. At the same time, the lifting rod 6 abuts against the lower side of the support arm 41. During the process of the inlet frame 2 not moving and the lifting rod 6 moving, there is no relative movement between the lifting rod 6 and the swing frame 4, so as to fully apply the lifting force of the lifting rod 6 to the swing frame 4.

[0073] Reference Figure 3 The lifting drive assembly 7 includes a lifting actuator 71 connected to the lifting rod 6. The lifting actuator 71 is formed by a transmission structure, and according to the layout of the transmission structure, the lifting actuator 71 has a pushing execution section 8. The pushing execution section 8 is arc-shaped and fixed in position, meaning its position does not change under the action of the power source. The movement path of the pushing execution section 8 coincides with that of the lifting rod 6. Based on the aforementioned configuration, the fixed-layout pushing execution section 8 allows the lifting drive assembly 7 to make the lifting rod 6 perform circular motion through a non-rotating shaft direct motion. This non-rotating shaft direct motion means that the lifting rod 6 is not directly connected to the output shaft of the motor or any device that rotates around itself.

[0074] In summary, referring to Figure 1 , Figure 2 and Figure 3 The lifting device of this application has the following advantages. First, with the help of the support arm 41 on the swing frame 4, only spaced pillow blocks 92 need to be configured on the circulating conveyor line 9 to lift the display screen. At the same time, by moving the inlet frame 2, the support arm 41 can enter the lifting channel 91 on the circulating conveyor line 9, thus lifting the display screen on the circulating conveyor line 9. This design does not require complex tooling plates, nor does it require major modification of the conveyor line, nor does it require a return connection device, thereby reducing the equipment cost involved in the production process of the display screen.

[0075] Secondly, since the lifting rod 6 lifts the swing frame 4 through circular motion, and the pushing execution section 8 extends in an arc shape, the force applied by the pushing execution section 8 to the lifting rod 6 and the force applied by the lifting rod 6 to the support arm 41 are in the same direction. This avoids vector decomposition, meaning there's no need to convert the resultant force into component forces before applying them to the support arm 41. Therefore, the mechanical efficiency is high, enabling the rapid lifting of large-size displays at large angles. Here, "large-size display" refers to a 65-95 inch display, "large angle" refers to 80-85°, and "rapid" refers to a time of approximately 3-5 seconds.

[0076] Third, since the lifting drive assembly 7 uses a non-rotating shaft direct motion, it will remain in a fixed position during the lifting of the swing frame 4, and will not move with the swing frame 4. This minimizes the space required in the production workshop and eliminates the need for extensive clearance space for this device. For example, as Figure 4 In the diagram, A is the output shaft of the motor. If a direct rotation of the rotating shaft is adopted, and in order to avoid the circulating conveyor line 9, a V-shaped rod or U-shaped rod needs to be connected between the motor and the lifting rod 6. Then, when the lifting rod 6 moves upward, a large amount of space needs to be provided for the V-shaped rod or U-shaped rod.

[0077] Fourth, after the swing frame 4 lifts the display screen, the circulating conveyor line 9 can still convey it forward, which can make the working cycle between two adjacent display screens more compact.

[0078] In summary, based on the four advantages mentioned above, it achieves efficient large-angle lifting of large-size displays with less equipment cost and lower space cost.

[0079] Reference Figure 3 Since achieving efficient lifting of a large-size display screen requires consideration of the power of the lifting drive component 7 and the overall load of the swing frame 4 plus the display screen, in order to minimize the power requirements of the lifting drive component 7, the load on the swing frame 4 needs to be reduced as much as possible, which means simplifying the structure of the swing frame 4. Of course, if the structure is simple, the manufacturing difficulty cannot be too high, so the cost of the device will still be high. Based on the above requirements, the structure of the swing frame 4 itself can be optimized.

[0080] Reference Figure 3 and Figure 5 Specifically, the swing frame 4 also includes a connecting beam 42, which is hinged to the cable tray 2. The connecting beam 42 is used to connect one end of the support arm 41 near the hinge. The support arm 41 is square tube in shape, and its length direction is perpendicular to the direction of the hinge axis 421 of the swing frame 4. The long side of the support arm 41 abuts against the display screen cable.

[0081] Based on the aforementioned structural form of the swing frame 4, firstly, both the support arm 41 and the connecting beam 42 have simple structures, and their assembly is also simple, thus achieving a simple structure and simple manufacturing. Secondly, the support arm 41 can support the display screen more stably. This greater stability refers to the larger contact area between the support arm 41 and the display screen. Furthermore, for the same weight, the hollow structure has a higher bending section modulus than a solid rod, meaning it can achieve the characteristics of being "lighter and stronger." Thirdly, the large contact area between the support arm 41 and the display screen also provides a larger mounting surface for other accessories, such as installing pads on the support arm 41.

[0082] Reference Figure 3 and Figure 5 To reduce the load on the swing frame 4, the structure of the positioning component 5 installed on the swing frame 4 can be optimized. This can be considered from two aspects: how the positioning component 5 is installed on the swing frame 4 and how the positioning component 5 is clamped and fixed. These two aspects are complementary, meaning that the structure of the positioning component 5 itself will affect how the positioning component 5 is installed on the swing frame 4. Specifically, a part of the components of the positioning component 5 will be installed in the inner cavity of the support arm 41. At the same time, a clamping window 411 will be opened at the end of the support arm 41 away from the connecting beam 42, so that the components of the positioning component 5 that will contact the display screen can be exposed from the inner cavity of the support arm 41, thereby simplifying the installation of the positioning component 5.

[0083] Reference Figure 3 , Figure 5 and Figure 6 The positioning component 5 specifically includes a baffle 51, a clamping cylinder 52, a clamping block 53, and a self-ejecting block 54. The baffle 51 is integrally formed and connected to the connecting beam 42. After the swing frame 4 is raised to a certain angle, the display screen will slide down and abut against the baffle 51 to provide a clamping and positioning base on one side along the length direction of the support arm 41. The clamping cylinder 52 is a pen-shaped cylinder, which is arranged along the length direction of the support arm 41 and is located inside the support arm 41.

[0084] Reference Figure 5 and Figure 6 The clamping block 53 is movably mounted on the piston rod of the clamping cylinder 52. The clamping block 53 is always within the range of the clamping window 411. The clamping block 53 can extend or retract from the clamping window 411. When the clamping block 53 extends outside the clamping window 411, it will abut against the side of the display screen away from the baffle 51 to provide a clamping positioning base on the other side along the length of the support arm 41. The self-ejecting block 54 is connected to the clamping block 53 and the piston rod of the clamping cylinder 52 respectively. When the clamping cylinder 52 causes the clamping block 53 to disengage from the large surface of the display screen, the self-ejecting block 54 generates a force that moves the clamping block 53 out of the clamping window 411.

[0085] Reference Figure 1 , Figure 5 and Figure 6In summary, based on the cooperation between the self-ejecting block 54 and the clamping block 53, that is, during the process of the support arm 41 entering the lifting channel 91, the display screen will press down the clamping block 53, causing the clamping block 53 to retract into the clamping window 411. After the clamping block 53 moves away from the connecting beam 42 and disengages from the display screen, the clamping block 53 will automatically extend out of the clamping window 411. Based on this requirement, there are requirements for the connection method between the clamping block 53 and the clamping cylinder 52, as well as the working principle of the self-ejecting block 54. If the structure is complex, it will lead to the cavity of the support arm 41 being too large, which will reduce the bending section modulus of the support arm 41.

[0086] Reference Figure 5 and Figure 6 Based on the aforementioned requirements for the clamping block 53 and the self-ejecting block 54, the following configuration is provided: a transition frame 531 is provided between the clamping block 53 and the piston rod of the clamping cylinder 52, and the transition frame 531 is fixedly connected to the piston rod of the clamping cylinder 52. One end of the clamping block 53 is rotatably connected to the transition frame 531, and the rotatably connected end is the end of the clamping block 53 away from the connecting beam 42. The other end extends or retracts from the clamping window 411. With this rotatable connection, when the support arm 41 enters the lifting through groove 91, after the clamping block 53 contacts the display screen, the clamping block 53 will be pressed down and retracted, thus simplifying the retraction action of the clamping block 53. The self-ejecting block 54 is a spring. One end of the self-ejecting block 54 is connected to the clamping block 53, and the other end is connected to the adapter frame 531. After the clamping block 53 disengages from the display screen, the elastic force released by the self-ejecting block 54 will cause the clamping block 53 to extend out of the clamping window 411, thus simplifying the extension action of the clamping block 53. In other embodiments, the self-ejecting block 54 can also achieve the extension of the clamping block 53 out of the clamping window 411 by repelling magnetic field force.

[0087] Reference Figure 3 and Figure 5 Based on the aforementioned installation method of the positioning component 5, most of the positioning component 5 is built into the inner cavity of the support arm 41, and a part of it is part of the connecting beam 42. Therefore, the center of gravity of various components on the swing frame 4 will be closer to the swing frame 4, and the load form of the swing frame 4 is relatively simple, which is also one of the ways to reduce the load of the swing frame 4.

[0088] Reference Figure 3 , Figure 5 and Figure 6Based on the aforementioned structural form of the positioning component 5, firstly, the extension and retraction of the clamping block 53 are relatively simple and do not require an additional power source. Secondly, when the clamping block 53 is brought into contact with the end of the display screen away from the baffle 51 by the clamping cylinder 52, the force applied by the pen-shaped cylinder is small, so the force generated by the pen-shaped cylinder will not damage the display screen, and the piston rod of the pen-shaped cylinder cannot continue to retract. Therefore, a simple structure can be used to clamp displays of different sizes. Thus, the components related to display screen clamping and positioning are relatively simple, which does not increase the structural complexity and weight of the swing frame 4, thereby reducing the load on the swing frame 4.

[0089] Reference Figure 1 and Figure 5 As can be seen from the above, the clamping block 53 and the baffle 51 fix the state of the display screen along the length of the support arm 41. However, during the process of the display screen sliding down to abut against the baffle 51, the display screen may shift along the length of the support arm 41. Therefore, in order to solve this problem and keep the structure of the swing frame 4 simple, specifically, the support arm 41 and the baffle 51 are provided with protective pads 11 made of elastic material at the positions where they abut against the display screen. Along the conveying direction of the circulating conveyor line 9, the thickness of the protective pad 11 first becomes thinner and then thicker, that is, the protective pad 11 is thicker on both sides and thinner in the middle. This thickness difference limits the display screen along the length of the support arm 41, thereby achieving the positioning of the display screen in four directions.

[0090] Reference Figure 5 and Figure 6 As mentioned above, the pen-shaped cylinder is used to clamp displays of different sizes along the length of the support arm 41. However, since the dimensions of the displays perpendicular to the length of the support arm 41 also differ depending on their size, it is necessary to consider how to clamp displays of different sizes in the dimension perpendicular to the length of the support arm 41. Specifically, the multiple support arms 41 are divided into two groups. The multiple support arms 41 in each group are equally spaced, and a clearance area 412 is formed between the two groups of support arms 41. This clearance area 412 is used to accommodate components on the display that interfere with the support arm 41. This means that without this clearance area 412, the support arm 41 will interfere with this component, which can be a controller or a drive box. At the same time, only the two closest support arms 41 are equipped with the aforementioned clamping cylinder 52, clamping block 53, and self-ejecting block 54, so that the clamping range is determined directly based on the smallest display size. Combined with the aforementioned protective pad 11, it is possible to stably clamp and position displays of different sizes with the fewest possible components.

[0091] In summary, the aforementioned optimizations related to the load of the swing frame 4 demonstrate that the goal is to achieve precise clamping and positioning of the display screen through a simple and easy-to-assemble structure, while also being able to support large-sized displays, i.e., heavier displays, and even displays of different sizes.

[0092] Reference Figure 3 As can be seen from the aforementioned optimization of the load on the swing frame 4, the swing frame 4 is light to medium load. At the same time, it is also considered that the swing frame 4 needs to be adapted to a large-size display screen, which means that the moving stroke of the swing frame 4 will be relatively long and the working cycle of the swing frame 4 needs to be relatively fast. For example, in this application, the swing frame 4 moves from the wire-off position to the wire-in position in about 3-5 seconds. However, while improving the working cycle, safety and economy also need to be taken into account. Based on this, the horizontal movement parameters of the wire-in frame 2, that is, the structure of the wire-in drive component 3, have been optimized.

[0093] Reference Figure 3 and Figure 7 The input drive assembly 3 includes an input motor 31, an input actuator 32, and an input transmission component 33. The input motor 31 is fixedly mounted on the frame 1 and is a brake motor. The input actuator 32 is a belt linear module, and there are two input actuators 32. One side of the belt in the input actuator 32 is fixedly connected to the input frame 2. The pulley distance between the two pulleys in one input actuator 32 is variable, which changes the belt tension of the input actuator 32. Specifically, in one input actuator 32, one pulley is farther from the circulating conveyor line 9 and rotates at a fixed position on the frame 1. The other pulley is closer to the circulating conveyor line 9 and can either rotate or slide horizontally in a direction parallel to the movement direction of the input frame 2. Thus, the belt tension in the input actuator 32 is changed by changing the pulley distance. The input transmission component 33 connects one input motor 31 and both input actuators 32, and is a chain drive.

[0094] From the structure of the input drive assembly 3, it can be seen that the input frame 2 is driven to move by a brake motor + chain drive + belt linear module. This design has the following advantages.

[0095] First, chain drive provides highly reliable power transmission, and belt linear modules are very suitable for long-stroke light and medium-load conveying motion. At the same time, belt linear modules have the characteristics of high-speed conveying, low inertia, and natural buffering. Based on this, the wire entry frame 2 can move slowly, then at high speed, and then slowly again to transfer from the wire exit position to the wire entry position, thereby improving the working cycle while maintaining safe transmission.

[0096] Secondly, chain drives offer flexible layout options, as they do not require strict coaxiality with the drive shaft of the belt-driven linear module, thus maintaining a simple equipment structure. In this embodiment, the input motor 31 is located below the input actuator 32, and the input transmission components 33 are arranged vertically to utilize the space in the lower layer of the frame 1 to accommodate the input motor 31. This improves the adaptability of the equipment's installation layout, ensuring a simple structure in various installation environments. In other embodiments, the input motor 31 can even be directly fixed to the ground.

[0097] Third, the tension of the belt can be changed by the input actuator 32. The change in belt tension will change the buffering capacity, and thus change the working rhythm adapted to the belt linear module. The reason for adjusting the tension according to the working rhythm is that the tighter the belt, the shorter its service life. Therefore, when the working rhythm is relatively slow, it is not necessary to make the belt too tight in order to balance the working rhythm and service life.

[0098] In summary, the requirements for the input drive assembly 3 are to adopt a low-cost, easy-to-assemble and layout structure, and to achieve horizontal transmission capabilities with features such as safety, high-speed transmission and long service life, so as to meet the working requirements of the input frame 2.

[0099] Reference Figure 3 To ensure greater stability of the swing frame 4 during lifting, the movement between the swing frame 4 and the cable entry frame 2 needs to be relatively stable. This stability means that the swing frame 4 experiences no movement other than lifting motion during the lifting process. Furthermore, the movement between the cable entry frame 2 and the machine frame 1 also needs to be relatively stable. This stability means that no significant movement occurs between the cable entry frame 2 and the machine frame 1 during the lifting process. Based on these two stability requirements, the connections between the cable entry frame 2 and the swing frame 4, and between the cable entry frame 2 and the machine frame 1, need to be optimized. These optimizations are not isolated but interconnected and complementary.

[0100] Reference Figure 3 and Figure 5 From the connection structure between the swing frame 4 and the inlet frame 2, there is a hinge seat 21 and a hinge shaft 421 between the inlet frame 2 and the swing frame 4. The hinge seat 21 is fixedly installed on the inlet frame 2. There are two hinge seats 21, located at both ends of the inlet frame 2 along the conveying direction of the circulating conveyor line 9. The hinge shaft 421 is integrally installed on the connecting beam 42. The hinge shaft 421 is cylindrical, and one hinge shaft 421 is rotatably inserted into one hinge seat 21.

[0101] Based on the connection structure between the swing frame 4 and the cable entry frame 2, the two hinge seats 21 form a "wide base" structure. First, this structure better resists lateral tilting moments, ensuring the swing frame 4 maintains stability during lifting. This means the lateral tilting moment is not transmitted to the connection between the cable entry frame 2 and the frame 1, thus improving the stability of the swing frame 4's lifting motion. Second, it also maximizes the lever arm between the lifting rod 6 and the hinge, allowing for the lifting of larger displays with less force, reducing the workload on the lifting drive assembly 7. Third, it ensures a more even load distribution on the swing frame 4, thereby reducing the internal stress on the connecting beam 42.

[0102] Reference Figure 5 , Figure 7 and Figure 8 From the perspective of the connection between the inlet frame 2 and the frame 1, a linear guide rail 22 is provided between the inlet frame 2 and the frame 1. Along the conveying direction of the circulating conveyor line 9, linear guide rails 22 are arranged at both ends of the inlet frame 2. The number of linear guide rails 22 arranged at each end can be one, two, or even three or more. The linear guide rails 22 are located inside the two hinge seats 21. At this time, the linear guide rail 22, the hinge seat 21, and the projection of the hinge seat 21 onto the plane where the linear guide rail 22 is located (e.g., Figure 8 In the diagram (point B), the three positions are arranged in a right-angled triangle. The linear guide rail 22 can balance the inward and downward force applied to the hinge seat 21 by the hinge shaft 421, thus resisting the bending moment applied to the wire entry frame 2 by the swing frame 4. In other words, the wire entry frame 2 can better resist various forms of forces transmitted from the swing frame 4. Therefore, the structural stability of the wire entry frame 2 also improves the lifting stability of the swing frame 4. Of course, this layout can also improve the overall strength and rigidity of the device, thereby extending the service life of the device.

[0103] It is important to note that if each end of the cable tray 2 has multiple linear guides 22, then the composite guide formed by these multiple linear guides should be arranged such that the center of this composite guide, the hinge seat 21, and the projection of the hinge seat 21 onto the plane containing the linear guides 22 form a right-angled triangle. For example, if there are two linear guides 22, such as... Figure 9 In the middle, let the midpoint of two linear guides 22 be located at a vertex of a right-angled triangle. If there are three linear guides 22, such as... Figure 10 In the middle, place the central linear guide rail 22 at one vertex of the right-angled triangle distribution.

[0104] In summary, through the connection structure between the swing frame 4, the wire inlet frame 2, and the frame 1, as well as the layout of the connection structure, the wire inlet frame 2 can stably resist the various forces transmitted by the swing frame 4. The connection between the wire inlet frame 2 and the frame 1 can also stably withstand the various forces transmitted by the swing frame 4, thereby stably supporting the swing frame 4 and making the lifting movement of the swing frame 4 more stable.

[0105] Reference Figure 5 , Figure 7 and Figure 8 As mentioned above, the linear guide 22 is located at an inward and downward angle to the hinge seat 21 so that the wire feed frame 2 can resist the bending moment applied by the swing frame 4. However, the distance between the linear guide 22 and the hinge seat 21 is limited along the conveying direction of the circulating conveyor line 9. This limitation prevents the wire feed actuator 32 from being installed within the horizontal distance between the linear guide 22 and the hinge seat 21. At the same time, the distance between the two wire feed actuators 32 cannot be too large, otherwise the load on the wire feed transmission component 33 will be too large. Therefore, the wire feed actuator 32 is located inside the linear guide 22, but if the distance is too small, the transmission stability of the wire feed frame 2 will be poor. Based on the above requirements, if... Figure 7 In the diagram, C represents the distance between the two input actuators 32, and D represents the distance between the two hinge seats 21. The distance between the two input actuators 32 is 60%-80% of the distance between the two hinge seats 21. In this way, the input transmission component 33 can achieve rigidity and precise synchronization while also providing the input frame 2 with optimal transmission force and transmission stability.

[0106] Reference Figure 5 , Figure 7 and Figure 8 Since the linear guide 22 exerts an inward lateral force on the cable entry frame 2, and the swing frame 4 applies an outward lateral force to the cable entry frame 2 through the hinge seat 21 (here, "inward" and "outward" refer to the relative positional relationship between the linear guide 22 and the cable entry actuator 32), in order to optimize the distribution of these two forces—that is, to ensure that both forces are at a controllable and low level—in other embodiments, the linear guide 22 is located exactly in the middle between the hinge seat 21 and the cable entry actuator 32. However, in this embodiment, considering the installation space of the cable entry actuator 32 and the torsional resistance of the cable entry frame 2, the linear guide 22 is positioned closer to the hinge seat 21.

[0107] In summary, based on the aforementioned optimizations related to the cable entry frame 2, it can be concluded that the cable entry frame 2's motion performance should be safe, high-speed, and stable. Its structural performance should be simple, with sufficient strength and rigidity. Furthermore, while satisfying both motion and structural performance requirements, the cable entry frame 2 should be able to easily achieve these performances. This means that the assembly of the cable entry frame 2 with other components in the equipment should be simple, and the coordination between the assembled components should be straightforward, achieving complex and high-quality performance through simple coordination.

[0108] Reference Figure 1 and Figure 3 Since the lifting drive assembly 7 is located above the circulating conveyor line 9, the lifting drive assembly 7 should avoid interfering with the circulating conveyor line 9 as much as possible. That is, the structure of the lifting drive assembly 7 should be as simple as possible. At the same time, as mentioned above, it needs to support a large-size display screen, which is inevitably heavier. In addition, the working cycle and safety issues must also be considered. Therefore, the lifting drive assembly 7 needs to complete the fast, stable and safe lifting action with a simple structure.

[0109] Reference Figure 3 and Figure 11 To achieve the aforementioned push-actuating section 8 with a simple structure, the following configuration is provided: A push-track plate 12 is fixedly installed on the frame 1. Two push-track plates 12 are provided, each engaging with one end of a lifting rod 6. The push-track plates 12 extend in an arc shape and have push-track grooves 13 extending synchronously with themselves. The push-track grooves 13 are open at both ends along their extension direction. Two lifting actuators 71 are provided, each engaging with one end of a lifting rod 6. Each lifting actuator 71 includes an actuator sprocket 711 and an actuator chain 712. The actuator sprocket 711 is rotatably mounted on the frame 1, and the actuator chain 712 is sleeved on the actuator sprocket 711. One side of the actuator chain 712 passes through the push-track groove 13 to form the push-actuating section 8. The actuator chain 712 in the push-track groove 13 is connected to the lifting rod 6.

[0110] Based on the above implementation of the push execution segment 8, it can be seen that the execution chain 712 and the push track groove 13 form an arc-shaped extended transmission structure. This transmission structure can transmit power and provide a static track structure, so it can more easily form a high-precision transmission path.

[0111] Reference Figure 11 and Figure 12Although the actuator chain 712 is located in the pusher track groove 13, the pusher track groove 13 cannot completely restrict the horizontal movement of the actuator chain 712. Therefore, a limiting wheel 61 is connected to the end of the lifting rod 6. The limiting wheel 61 is rotatably mounted on the lifting rod 6 via a bearing. At the same time, a limiting groove 611 is formed on the outer circumferential wall of the limiting wheel 61, which is embedded in the pusher track plate 12. With the cooperation of the limiting wheel 61 and the pusher track plate 12, the amplitude of the horizontal movement of the actuator chain 712 can be limited, thereby improving the smoothness and accuracy of the movement, significantly reducing abnormal wear, and extending the service life.

[0112] It should be noted that, considering the ease of installation of the limiting wheel 61, the limiting wheel 61 is only embedded on one side of the push track plate 12. Furthermore, considering the influence of the friction between the limiting wheel 61 and the push track plate 12 on the movement of the lifting rod 6, the limiting wheel 61 is embedded on the inner side of the push track plate 12. Therefore, under the action of the gravity of the lifting rod 6, the bottom of the groove of the limiting wheel 61 will not abut against the push track plate 12, thereby improving the smoothness of the movement of the lifting rod 6.

[0113] It should also be noted that since the lifting rod 6 is also connected to the execution chain 712, a connecting seat 64 is provided between the lifting rod 6 and the execution chain 712. The connecting seat 64 is fixedly connected to the execution chain 712 through a double row of chain buckles. The connecting seat 64 is used to fix the lifting rod 6 in place. The part of the lifting rod 6 that passes through the connecting seat 64 is then connected to the limit wheel 61.

[0114] Reference Figure 11 The lifting drive assembly 7 also includes a lifting motor 72 and a lifting transmission component 73. The lifting motor 72 is fixedly mounted on the frame 1 and is a brake motor. The lifting transmission component 73 is a chain drive, which connects the lifting motor 72 and the lifting actuator 71 respectively. The chain drive provides high efficiency, high rigidity, flexible layout and economy, and realizes the fast and precise circular motion of the lifting rod 6. The brake motor makes up for the fact that the chain drive cannot be self-locking, thus achieving both high-efficiency and high-stability transmission and comprehensive safety protection.

[0115] In summary, based on the structural form of the lifting drive assembly 7 and its cooperation with the frame 1, it can be seen that the use of chain drive makes it easy to arrange irregular tracks, and the characteristics of chain drive itself achieve the goal of completing fast, stable and safe lifting operations with a simple structure.

[0116] Reference Figure 3 and Figure 11As mentioned above, one side of the execution chain 712 is located in the arc-shaped push track groove 13 to form the push execution section 8. The other side of the execution chain 712 does not need to be arc-shaped. Specifically, a lifting execution member 71 has three execution sprockets 711, which are arranged in a right triangle. At this time, it is only necessary to bend the execution chain 712 at the hypotenuse into an arc shape. Therefore, fewer execution sprockets 711 are used to form the required push execution section 8, which further simplifies the structure of the device.

[0117] Reference Figure 3 and Figure 11 During chain drive installation, the chain must first be in a slack state. Only after the chain and sprocket are roughly matched is the chain finally tightened. This means that the tension of the lifting actuator 71 needs to be adjusted during installation. Furthermore, there are other situations where the tension of the lifting actuator 71 needs adjustment, such as when the chain wears or stretches, or even when the ambient temperature changes, as the gaps between chain links will change. Therefore, the structure of the lifting actuator 71 must also facilitate the adjustment of chain tension.

[0118] Reference Figure 11 and Figure 13 In a lifting actuator 71, three actuator sprockets 711 are a drive sprocket 7111, an intermediate sprocket 7112, and an adjusting sprocket 7113. The drive sprocket 7111 is rotatably mounted on the frame 1 and is located at the lower end of the push track plate 12. The drive sprocket 7111 is connected to the lifting transmission component 73. The intermediate sprocket 7112 is rotatably mounted on the frame 1 and is located on the outer arc of the push track plate 12. The adjusting sprocket 7113 is located at the upper end of the push track plate 12. An adjusting slide 14 is provided between the adjusting sprocket 7113 and the frame 1. The adjusting slide 14 allows the adjusting sprocket 7113 to rotate and slides towards or away from the intermediate sprocket 7112.

[0119] From the structural layout of the lifting actuator 71, it can be seen that, based on the right-angled triangle distribution of the three actuator sprockets 711, the tension of the actuator chain 712 can be changed simply by adjusting the sprocket 7113 to move closer to or further away from the middle sprocket 7112. At the same time, since the adjusting sprocket 7113 is the driven wheel and is located at the top, there is enough space to operate the adjusting sprocket 7113, and the tension adjustment can be achieved simply by moving the adjusting sprocket 7113. In fact, moving the adjusting sprocket 7113 is even easier.

[0120] To enable the movement of the adjusting slide block 14, an adjusting bolt 15 is installed on the adjusting slide block 14. The adjusting bolt 15 is rotatably mounted on the frame 1, and its threads pass through the adjusting slide block 14. Similar to the principle of a lead screw and nut, the rotation of the adjusting bolt 15 enables the sliding of the adjusting sprocket 7113. Similarly, this structural form can also be used on the sliding pulley in the aforementioned input actuator 32.

[0121] In summary, through the aforementioned optimizations of the lifting drive component 7, it can be seen that the goal is to achieve rapid, stable, and safe lifting of the swing frame 4 through a simple and easy-to-assemble structural form.

[0122] Reference Figure 3 , Figure 11 and Figure 12 To prevent the lifting rod 6 from vibrating and scratching the display screen during start-stop, this embodiment includes the following configuration: the execution chain 712 located in the pusher track groove 13 is also connected to a stop rod 62. The two ends of the stop rod 62 are respectively connected to two connecting chain seats 64. The stop rod 62 is located above the lifting rod 6, and the distance between the stop rod 62 and the lifting rod 6 is greater than the thickness of the support arm 41. Simultaneously, the lifting rod 6 is fitted with a shock-absorbing sleeve 63 made of elastic material, which abuts against the lower side of the support arm 41. The shock-absorbing sleeve 63 reduces the vibration amplitude of the support arm 41, and the stop rod 62 limits the maximum vibration amplitude of the support arm 41, thereby protecting the display screen.

[0123] In addition, in this embodiment, since the distance between the stop bar 62 and the lifting bar 6 is slightly greater than the thickness of the support arm 41, the cable entry frame 2 can be slightly moved while the lifting bar 6 remains stationary, thereby changing the angle of the swing frame 4. This allows for fine-tuning of the display screen's posture to meet more working conditions, such as different manual operation angles, and to adapt to the manufacturing tolerances of the display screen.

[0124] In summary, the lifting device of this application is characterized by the simplicity of the swing frame 4 structure. The swing frame 4 is light to medium load-bearing, and the weight of the swing frame 4 plus the display screen is not too heavy. Therefore, while supporting a large-size display screen, it can simultaneously and quickly, stably, safely, and adaptably horizontally transport swings of different loads through a simple transmission connection structure. It can also lift large-size display screens at high speed, stably, and safely through a simple transmission connection structure, and it has a stronger micro-angle adjustment capability. Furthermore, the entire device is relatively convenient to assemble and maintain during operation.

[0125] In simpler terms, it means using simple standard or non-standard parts and simple assembly methods to assemble a lifting device with a simple structure, low requirements for the external environment, and strong working performance.

[0126] This application also discloses a method for lifting a large-size display screen. Specifically, the method includes the following steps:

[0127] S1. After the circulating conveyor line 9 transfers the display screen to the predetermined workstation, the inlet drive assembly 3 causes the swing frame 4 to move from the wire-off position to the wire-in position, so that the support arm 41 enters the lifting channel 91. In this step, the inlet frame 2 moves slowly first, then moves at high speed, and then moves slowly again.

[0128] S2. The swing frame 4 is swung upward by lifting drive component 7. When the display screen slides down and touches the baffle 51, the swing frame 4 stops moving. In this step, the swing frame 4 is raised slowly.

[0129] S3. Make the clamping block 53 abut against the end of the display screen away from the baffle 51 to complete the clamping and fixing of the display screen on the swing frame 4. In this step, the piston rod of the clamping cylinder 52 extends, so that the clamping block 53 first extends to the outside of the clamping window 411, and then the piston rod of the clamping cylinder 52 retracts until the clamping block 53 is grounded to the display screen.

[0130] S4. The swing frame 4 continues to swing upward by lifting drive assembly 7 until the tilt angle of the swing frame 4 reaches a predetermined value. In this step, the swing frame 4 is first slowly lifted, then lifted at high speed, and then slowly lifted again.

[0131] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A large-size display screen lifting device for cooperating with a circulating conveying line (9) having a lifting channel (91), characterized in that: include: Rack (1); The inlet frame (2) is horizontally slidably mounted on the frame (1); The cable entry drive assembly (3) is connected to the cable entry frame (2); The swing frame (4) is hinged on the wire inlet frame (2). The movement of the wire inlet frame (2) enables the swing frame (4) to have a wire inlet position and a wire outlet position. The swing frame (4) has a support arm (41). In the wire inlet position, the support arm (41) enters the lifting through groove (91). A positioning component (5) is provided on the swing frame (4) for fixing the display screen on the swing frame (4); The lifting rod (6) is circumferentially mounted on the frame (1). The center line of the circumferential motion of the lifting rod (6) is coaxially mounted with the hinge axis (421) of the swing frame (4) when it is in the inlet position. The lifting rod (6) abuts against the lower side of the support arm (41). The lifting drive assembly (7) includes a lifting actuator (71) connected to the lifting rod (6). The lifting actuator (71) has a pushing execution section (8), which extends in an arc shape. The pushing execution section (8) is arranged to coincide with the movement path of the lifting rod (6). The pushing execution section (8) enables the lifting drive assembly (7) to make the lifting rod (6) perform circular motion through direct transmission of a non-rotating shaft. The swing frame (4) also includes a connecting beam (42), which is hinged to the cable tray (2). The connecting beam (42) is used to connect the end of the support arm (41) near the hinge. The support arm (41) is square tube in shape, and the long side of the support arm (41) abuts against the display screen. The end of the support arm (41) away from the connecting beam (42) is provided with a clamping window (411). The positioning component (5) includes a baffle (51), a clamping cylinder (52), a clamping block (53), and a self-ejecting block (54). The baffle (51) is disposed on the connecting beam (42) and abuts against the end of the display screen near the connecting beam (42). The clamping cylinder (52) is a pen-shaped cylinder and is disposed inside the support arm (41). The clamping cylinder (52) extends along the length of the support arm (41). The clamping block (53) is movably disposed on the piston rod of the clamping cylinder (52). The upper part is movable to allow the clamping block (53) to extend or retract from the clamping window (411). The clamping block (53) extending out of the clamping window (411) abuts against the end of the display screen away from the connecting beam (42). The self-ejecting block (54) is connected to the clamping block (53) and the piston rod of the clamping cylinder (52) respectively. When the clamping cylinder (52) causes the clamping block (53) to disengage from the large surface of the display screen, the self-ejecting block (54) generates a force to move the clamping block (53) out of the clamping window (411). The frame (1) is provided with a push track plate (12), the push track plate (12) extends along an arc, the push track plate (12) is provided with a push track groove (13) that extends synchronously with itself, and the push track groove (13) is provided with openings at both ends along the extension direction; The lifting actuator (71) includes an actuator sprocket (711) and an actuator chain (712). The actuator sprocket (711) is rotatably mounted on the frame (1). The actuator chain (712) is sleeved on the actuator sprocket (711). One side of the actuator chain (712) passes through the push track groove (13) to form the push execution section (8). The actuator chain (712) in the push track groove (13) is connected to the lifting rod (6). The lifting drive assembly (7) further includes a lifting motor (72) and a lifting transmission component (73). The lifting motor (72) is fixedly installed and is a brake motor. The lifting transmission component (73) is a chain drive and is connected to the lifting motor (72) and the lifting actuator (71) respectively.

2. The large size display screen lifting device according to claim 1, wherein: The support arm (41) and the baffle (51) are provided with protective pads (11) made of elastic material at the positions where they abut against the display screen. Along the conveying direction of the circulating conveyor line (9), the thickness of the protective pads (11) first becomes thinner and then thicker.

3. The large size display screen lifting device according to claim 2, wherein: The multiple support arms (41) are divided into two groups. The multiple support arms (41) in one group are equally spaced. A clearance area (412) is formed between the two groups of support arms (41). The clearance area (412) accommodates the components on the display screen that interfere with the support arms (41). Between the two groups of support arms (41), the two closest support arms (41) are provided with the clamping cylinder (52), the clamping block (53) and the self-ejecting block (54).

4. The large size display screen lifting device according to claim 3, wherein: The wire entry drive assembly (3) includes a wire entry motor (31), a wire entry actuator (32), and a wire entry transmission component (33). The wire entry motor (31) is fixedly installed and is a brake motor. The wire entry actuator (32) is a belt linear module. There are two wire entry actuators (32). One side of the belt of the wire entry actuator (32) is connected to the wire entry frame (2). The wheel spacing between the two pulleys in one wire entry actuator (32) is variable. The variable wheel spacing allows the belt of the wire entry actuator (32) to change its tension. The wire entry transmission component (33) is connected to one wire entry motor (31) and two wire entry actuators (32) respectively. The wire entry transmission component (33) is a chain drive.

5. The large size display screen lifting device according to claim 4, wherein: There is a hinge seat (21) and a hinge shaft (421) between the inlet frame (2) and the swing frame (4). The hinge seat (21) is fixedly installed on the inlet frame (2). There are two hinge seats (21). Along the conveying direction of the circulating conveyor line (9), the two hinge seats (21) are located at both ends of the inlet frame (2). The hinge shaft (421) is fixedly installed on the connecting beam (42). One hinge shaft (421) is rotatably inserted into one hinge seat (21). A linear guide rail (22) is provided between the inlet frame (2) and the frame (1). The linear guide rail (22) is arranged at both ends of the inlet frame (2) along the conveying direction of the circulating conveyor line (9). The linear guide rail (22) is located inside the two hinge seats (21) so that the inlet frame (2) resists the bending moment applied by the swing frame (4).

6. The large size display screen lifting device according to claim 5, wherein: Along the conveying direction of the circulating conveyor line (9), the inlet actuator (32) is located inside the linear guide rail (22), the distance between the two inlet actuators (32) is 60%-80% of the distance between the two hinge seats (21), the linear guide rail (22) is located in the middle between the hinge seat (21) and the inlet actuator (32) or the linear guide rail (22) is closer to the hinge seat (21).

7. The large size display screen lifting device according to claim 3, wherein: The end of the lifting rod (6) is connected to a limiting wheel (61), and the outer wall of the limiting wheel (61) is provided with a limiting groove (611), which is used for the push track plate (12) to be embedded.

8. The large size display screen lifting device according to claim 7, wherein: Both ends of the lifting rod (6) are fitted with the push track plate (12) and the lifting actuator (71). Each lifting actuator (71) has three actuator sprockets (711), which are arranged in a right-angled triangle. The three actuator sprockets (711) are the drive sprocket (7111), the intermediate sprocket (7112), and the adjusting sprocket (7113). The drive sprocket (7111) is rotatably mounted on the frame (1) and is located at the lower end of the push track plate (12). 7111) is connected to the lifting transmission component (73); the intermediate sprocket (7112) is rotatably mounted on the frame (1), and the intermediate sprocket (7112) is located on the outer arc of the push track plate (12); the adjusting sprocket (7113) is located at the upper end of the push track plate (12), and an adjusting slide (14) is provided between the adjusting sprocket (7113) and the frame (1), the adjusting slide (14) is provided for the adjusting sprocket (7113) to rotate, and the adjusting slide (14) is slidably mounted in the direction of approaching or away from the intermediate sprocket (7112).

9. The large-size display screen lifting device according to claim 7, characterized in that: The execution chain (712) located in the pusher track groove (13) is also connected to a stop bar (62). The stop bar (62) is located above the lifting rod (6). The distance between the stop bar (62) and the lifting rod (6) is greater than the thickness of the support arm (41). The lifting rod (6) is provided with a shock-absorbing sleeve (63). The shock-absorbing sleeve (63) abuts against the lower side of the support arm (41).

10. A method for lifting a large-size display screen, characterized in that, The large-size display screen lifting device as described in any one of claims 2-9 includes the following steps: S1. After the circulating conveyor line (9) transfers the display screen to the predetermined station, the swing frame (4) is moved from the de-wire position to the in-wire position by the in-wire drive assembly (3) so that the support arm (41) enters the lifting channel (91). S2; The swing frame (4) is swung upward by lifting the drive assembly (7), and the swing frame (4) stops moving when the display screen slides down and touches the baffle (51); S3. Make the clamp (53) abut against the end of the display screen away from the baffle (51) to complete the clamping and fixing of the display screen on the swing frame (4); S4. The swing frame (4) continues to swing upward by lifting the drive assembly (7) until the tilt angle of the swing frame (4) reaches a predetermined value.

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