An ultra-long heavy load material stacking machine

Abstract

The application relates to the technical field of warehouse logistics equipment, in particular to an ultralong heavy-load material stacking machine, which comprises a lower beam assembly, an upper beam assembly and a loading platform main body, two groups of stand columns are arranged between the lower beam assembly and the upper beam assembly, the two groups of stand columns are respectively arranged at the two ends of the lower beam assembly and the upper beam assembly, the loading platform main body is arranged between the two groups of stand columns, the two ends of the loading platform main body are slidably connected to the two groups of stand columns, two groups of fork assemblies for storing and taking ultralong goods are further arranged on the loading platform main body, counterweights and winding rope assemblies are further arranged on the two groups of stand columns, and the output ends of the counterweights and the winding rope assemblies are connected with the loading platform main body. The ultralong heavy-load operation stability is improved through the whole machine walking and lifting balance structure design, the stable transfer is guaranteed, different specifications of ultralong materials are self-adaptively stored and taken through the cooperation of the adjustable detection mechanism and the multiple groups of forks, the material sliding risk is reduced, and the equipment universal applicability is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of warehousing and logistics equipment technology, specifically an ultra-long heavy-duty material stacker crane. Background Technology

[0002] As manufacturing and logistics companies continue to expand, the number and size of warehouses are also increasing. However, manpower and manual operation can no longer meet the demand for fast and efficient logistics. Against this backdrop, stacker robots have been widely used and promoted, and have gradually become an indispensable part of the logistics industry. Stacker cranes are the core lifting and handling equipment in automated warehousing systems. Their main function is to move back and forth in warehouse aisles, storing goods at aisle entrances into rack locations, or retrieving goods from rack locations and transferring them to aisle entrances, thus achieving automated goods storage and retrieval.

[0003] However, with the widespread development of warehouse stacker cranes, industries such as pipe and steel production are increasingly favoring the use of stacker cranes for cargo handling and warehousing. Profiles are characterized by their heavy weight, large load capacity, and extremely long and varied lengths. Existing stacker cranes have limited platform span and load-bearing capacity, making it difficult to adapt to the transfer needs of ultra-long materials. Stacker cranes for ultra-long and heavy-duty materials need to be equipped with longer platforms, but such platforms are prone to tilting during operation, affecting the normal operation of stacking. Furthermore, conventional stacker cranes usually have a single set of forks, which are difficult to carry materials with large spans and ultra-long dimensions. When storing and retrieving long materials, bending deformation and uneven force can easily occur, leading to slippage. They can only adapt to short, light-weight standard materials and are not suitable for long aisle and high-density warehousing scenarios.

[0004] Therefore, those skilled in the art have provided an ultra-long, heavy-duty material stacker to solve the problems mentioned in the background art. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-long heavy-duty material stacker to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An ultra-long heavy-duty material stacker includes a lower beam assembly, an upper beam assembly, and a loading platform body. Two sets of columns are erected between the lower beam assembly and the upper beam assembly, and the two sets of columns are located at the two ends of the lower beam assembly and the upper beam assembly, respectively. The loading platform body is disposed between the two sets of columns, and the two ends of the loading platform body are slidably connected to the two sets of columns. The loading platform body is also provided with two sets of fork assemblies for storing and retrieving ultra-long goods. The two sets of columns are also provided with counterweight and rope winding assemblies, and the output end of the counterweight and rope winding assemblies is connected to the loading platform body. Both sides of the main body of the loading platform are also equipped with safety protection components for the safety protection of the main body of the loading platform and side guide wheel assemblies to assist the main body of the loading platform in moving on the column.

[0007] Preferably, the lower beam assembly includes a lower beam body, one end of which is fixedly connected to a lower beam drive motor, the output end of which is fixedly connected to a drive wheel via a coupling, and the other end of the lower beam body is rotatably connected to a lower beam driven wheel set for assisting the lower beam body to move on the ground rail. The upper beam assembly includes an upper beam body, both ends of which are rotatably connected to upper beam guide wheels to assist the lower beam drive motor in moving. Both ends of the upper beam body are also fixedly connected to upper pulley groups for lifting the main body of the loading platform by auxiliary counterweights and rope winding assemblies. Both ends of the upper beam body are also fixedly connected to anti-collision blocks.

[0008] Preferably, the main body of the loading platform includes a horizontal loading platform frame, which is fixedly connected to the lower beam body. Vertical loading platform frames are fixedly connected to both sides of the horizontal loading platform frame. An upper frame is fixedly connected between the two sets of vertical loading platform frames, and the upper frame is located at the top of the two sets of vertical loading platform frames. An adjustable material detection mechanism is provided in the upper frame. Auxiliary pressure rollers for assisting the movement of the main body of the loading platform are also fixedly connected to the side of the two sets of vertical loading platform frames that are far apart from each other. The adjustable material detection mechanism includes a servo motor fixedly connected to the upper frame and two sets of synchronous pulleys rotatably connected to the upper frame. The output end of the servo motor is connected to one of the sets of synchronous pulleys via a coupling. A synchronous belt is sleeved between the two sets of synchronous pulleys, and the two sets of synchronous pulleys are connected by the synchronous belt drive. A guide rail is also fixedly connected to the upper frame, and the guide rail is located directly below the synchronous belt. The adjustable material detection mechanism also includes two sets of detection switches. One set of detection switches is fixedly connected to the guide rail, and the other set of detection switches is fixedly connected to the synchronous belt and slides on the guide rail.

[0009] Preferably, both sets of fork assemblies are fixedly connected to the horizontal frame of the loading platform. Each set of fork assemblies includes three fork bodies, each fork body including a lower fork, a middle fork, and an upper fork. The lower fork, middle fork, and upper fork are connected by a drive chain. A fork drive motor is fixedly connected to the bottom of one set of lower forks, and the output end of the fork drive motor is connected to the drive chain. A universal coupling is fixedly connected between multiple sets of fork bodies, and the multiple sets of fork bodies achieve synchronous movement through the universal coupling. Each set of upper forks also has a fork hook fixedly connected to the end away from the fork body to fix the goods.

[0010] Preferably, the counterweight and rope winding assembly includes a lifting motor, which is fixedly connected to one of the columns. The output end of the lifting motor is fixedly connected to two sets of drums via a coupling. A left traction rope and a right traction rope are wound on the two sets of drums respectively. The left traction rope is connected to the left side of the main body of the loading platform via a pulley, and the right traction rope is connected to the right side of the main body of the loading platform via a pulley. Both the left and right traction ropes are connected to the safety protection component. The counterweight and rope assembly also includes two sets of counterweight blocks, two sets of left counterweight traction ropes, and two sets of right counterweight traction ropes. The two sets of counterweight blocks are respectively installed in the two sets of columns. One end of each of the two sets of left counterweight traction ropes is connected to the vertical frame of the left and right loading platform, and the other end is connected to the adjacent counterweight block. One end of each of the two sets of right counterweight traction ropes is also connected to the vertical frame of the left and right loading platform, and the other end is connected to the adjacent counterweight block.

[0011] Preferably, each set of safety protection components includes a pull rod weldment, a lifting plate, a drive shaft, and a lifting plate. The pull rod weldment is fixedly connected to the vertical frame of the loading platform. The lifting plate is mounted on the pull rod weldment. Both ends of the drive shaft are hinged to the vertical frame of the loading platform via hinge seats. The side of the lifting plate closest to the drive shaft is fixed to the drive shaft. The lifting plate is fixedly connected to the end of the drive shaft away from the lifting plate. The end of the lifting plate away from the drive shaft is connected to the safety clamp assembly. Multiple sets of connecting shafts are also fixedly connected to the drive shaft. One set of connecting shafts is hinged with a lifting rope. The other end of the lifting rope passes through the horizontal frame of the loading platform and is connected to the safety protection component on the other side of the vertical frame of the loading platform. The safety protection assembly also includes two sets of top rods, two sets of pressure plates, and a reverse rope pulley. The tops of the two sets of top rods are connected to the wheel frame of the reverse rope pulley. The two sets of pressure plates are respectively located directly below the adjacent top rods, and the end of each pressure plate near the adjacent top rod is connected to the bottom of the adjacent top rod. Each set of pressure plates is hinged with a support frame, and the support frame is fixedly connected to the vertical frame of the loading platform. The end of each pressure plate away from the top rod is also hinged with a transmission rod. The ends of the two sets of transmission rods away from the pressure plates are rotatably connected to the connecting shafts on the drive shaft.

[0012] Preferably, the safety clamp assembly includes a safety clamp bracket fixedly connected to the vertical frame of the loading platform. The safety clamp bracket is provided with a sliding wedge and a fixed wedge. The sliding wedge is slidably connected to the safety clamp bracket, and the fixed wedge is fixedly connected to the safety clamp bracket. A brake roller is provided between the sliding wedge and the fixed wedge. The top of the brake roller is connected to the lifting plate. A groove for the column to slide is provided between the brake roller and the sliding wedge. The safety clamp bracket is also rotatably connected to two sets of support guide wheels. The two sets of support guide wheels are located on the upper and lower sides of the sliding inclined block, and both sets of support guide wheels are in contact with the outer wall of the column.

[0013] Preferably, each set of side guide wheel assemblies includes a main rotating shaft, each set of main rotating shafts is fixedly connected to the vertical frame of the loading platform, and a guide wheel bracket is rotatably connected to the end of each set of main rotating shafts away from the vertical frame of the loading platform. Two sets of side guide wheel bodies are rotatably connected in each set of guide wheel brackets, and multiple sets of side guide wheel bodies are in contact with the outer wall of the column. The main body of the side guide wheel is hollow, and each set of side guide wheel main bodies is provided with a deceleration groove, and each set of deceleration grooves is provided with a deceleration component.

[0014] Preferably, the deceleration assembly includes a synchronizing disc rotatably connected to the side guide wheel body, an adjusting disc fixedly connected to one side of the synchronizing disc, and the side of the adjusting disc away from the synchronizing disc rotatably connected to the inner wall of the side guide wheel body via a rotating shaft. A torsion spring is sleeved on the rotating shaft of the adjusting disc. Multiple sets of adjusting grooves are formed on the adjusting disc. Each set of adjusting grooves is slidably connected to a ceramic friction plate. The end of each set of ceramic friction plates away from the adjusting groove passes through the side guide wheel body and extends into the adjacent deceleration groove. The deceleration assembly also includes two sets of centrifugal pawls rotatably connected to the inner wall of the side guide wheel body. The two sets of centrifugal pawls are centrally symmetrically arranged in the synchronization disc. A synchronization rod is hinged between one end of the two sets of centrifugal pawls, and a return spring is fixedly connected between the other ends. The side of the synchronization disc away from the adjustment disc also has multiple sets of evenly distributed limiting teeth, and the shape of the limiting teeth is adapted to the claw hooks on the two sets of centrifugal pawls.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the balanced structure design of the whole machine's walking and lifting significantly improves the operational stability in ultra-long and heavy-load scenarios, adapting to the storage needs of long-sized materials. The walking structure with synchronous guidance at both ends of the upper and lower beams can constrain the lateral deviation of the ultra-long machine body during operation, avoiding swaying or tilting of the large-span machine body, making it suitable for continuous operation scenarios in long aisles. The lifting structure with synchronous traction of the double drums, combined with the diagonally arranged counterweight rope system, structurally ensures that the lifting actions at both ends of the loading platform are completely synchronized. With the multi-point guidance of the guide wheels on both sides of the loading platform, the risk of off-center loading during heavy-load lifting can be effectively reduced, ensuring the stability of ultra-long material transfer.

[0016] 2. In this invention, the adaptive storage and retrieval of extra-long materials of different specifications is achieved through the collaborative design of an adjustable detection mechanism and multiple sets of forks, which significantly improves the versatility of the equipment. The adjustable material detection mechanism can automatically adjust the detection point according to the material length, and can complete the position and off-center loading status verification of materials of different sizes without the need for manual parameter preset, reducing the parameter configuration step before operation. Multiple sets of forks can be flexibly combined to start and stop according to the material length. When the material is short, a single set of forks can operate independently, and when the material is long, two sets of forks can bear the load simultaneously. The anti-detachment structure at the end of the forks can further reduce the risk of material slippage, and is compatible with the storage and retrieval needs of extra-long materials such as profiles, pipes, and plates of different specifications.

[0017] 3. In this invention, a multi-layered safety redundancy system is constructed through the design of graded safety protection and dual-side linkage braking, which greatly improves the safety of heavy-load operations. The centrifugal pre-deceleration mechanism built into the side guide wheel can automatically achieve soft deceleration when there is slight overspeed, and can pull the speed back to the safe range without triggering the brake lock, avoiding damage to equipment and materials caused by rigid impact. If the overspeed is more severe or there is a slack rope or rope breakage, the dual independent safety protection components can trigger the safety clamp lock simultaneously. The left and right braking actions are completely synchronized through the linkage rope, avoiding the tilting of the loading platform caused by single-side braking. The multiple triggering mechanisms can cover various fault scenarios such as overspeed, slack rope, and rope breakage. The braking response speed is fast, effectively avoiding the risk of heavy-load falls and meeting the safety requirements of high-load continuous operation. Attached Figure Description

[0018] Figure 1 This is a first-view schematic diagram of the present invention; Figure 2 This is a schematic diagram of the counterweight and rope winding assembly in this invention; Figure 3 This is a schematic diagram of the lower beam assembly structure in this invention; Figure 4 This is a schematic diagram of the upper beam assembly structure in this invention; Figure 5 This is a schematic diagram of the upper pulley block structure in this invention; Figure 6 This is a schematic diagram of the structure of the cargo platform body in this invention; Figure 7 This is a schematic diagram of the adjustable material detection mechanism on the main body of the loading platform in this invention; Figure 8 This is a schematic diagram of the fork assembly in this invention; Figure 9 In this invention Figure 8 Enlarged schematic diagram of the structure at point A above; Figure 10 This is a schematic diagram of the structure of the safety protection component and the safety clamp component in this invention. Figure 1 ; Figure 11 This is a schematic diagram of the structure of the safety protection component and the safety clamp component in this invention. Figure 2 ; Figure 12 This is a partial structural diagram of the safety protection component in this invention; Figure 13 This is a schematic diagram of the safety clamp assembly in this invention; Figure 14 This is a schematic diagram of the structure of the two sets of safety protection components and the safety clamp assembly in this invention; Figure 15 This is a schematic diagram of the side guide wheel assembly in this invention; Figure 16 This is an exploded view of the deceleration component in this invention; Figure 17 This is a partial structural diagram of the deceleration component in this invention.

[0019] In the diagram: 1. Lower beam assembly; 11. Lower beam body; 12. Lower beam drive motor; 13. Drive wheel; 14. Lower beam driven wheel assembly; 2. Upper beam assembly; 21. Upper beam body; 22. Upper beam guide wheel; 23. Upper pulley assembly; 24. Anti-collision block; 3. Cargo platform main body; 31. Cargo platform horizontal frame; 32. Cargo platform vertical frame; 33. Upper frame; 34. Servo motor; 35. Synchronous pulley; 36. Synchronous belt; 37. Guide rail; 38. Detection switch; 39. Auxiliary pressure roller; 4. Counterweight and rope winding assembly; 41. Lifting motor; 42. Drum; 43. Left traction rope; 44. Right traction rope; 45. Counterweight block; 46. Left counterweight traction rope; 47. Right counterweight traction rope; 5. Fork assembly; 51. Fork body; 52. Lower fork; 53. Middle fork; 54. 55. Fork drive motor; 56. Universal coupling; 57. Fork hook; 6. Safety protection components; 61. Pull rod weldment; 62. Lifting plate; 63. Drive shaft; 64. Lifting plate; 65. Transmission rod; 66. Top rod; 67. Pressure plate; 68. Reverse rope pulley; 69. Lifting rope; 7. Safety gear assembly; 71. Safety gear bracket; 72. Sliding wedge; 73. Fixed wedge; 74. Brake roller; 75. Support guide wheel; 8. Side guide wheel assembly; 81. Main shaft; 82. Guide wheel bracket; 83. Side guide wheel body; 84. Reduction groove; 9. Reduction assembly; 91. Synchronizing disc; 92. Adjusting disc; 93. Adjusting groove; 94. Ceramic friction plate; 95. Limiting tooth; 96. Centrifugal pawl; 97. Synchronizing rod; 98. Return spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1, please refer to Figure 1-17 An ultra-long heavy-duty stacker crane includes a lower beam assembly 1, an upper beam assembly 2, and a loading platform body 3. Two sets of columns are erected between the lower beam assembly 1 and the upper beam assembly 2, with the two sets of columns located at opposite ends of the lower beam assembly 1 and the upper beam assembly 2, respectively. The loading platform body 3 is positioned between the two sets of columns, with both ends of the loading platform body 3 slidably connected to the two sets of columns. The loading platform body 3 is also equipped with two sets of fork assemblies 5 for storing and retrieving ultra-long goods. Counterweight and rope winding assemblies 4 are also installed on the two sets of columns, with the output ends of the counterweight and rope winding assemblies 4 connected to the loading platform body 3. Safety protection components 6 are also installed on both sides of the loading platform body 3 for safety protection of the loading platform body 3, as well as auxiliary components for the loading platform body 3 to be mounted on the columns. The movable side guide wheel assembly 8, the lower beam assembly 1 includes a lower beam body 11, one end of the lower beam body 11 is fixedly connected to a lower beam drive motor 12, the output end of the lower beam drive motor 12 is fixedly connected to a drive wheel 13 through a coupling, the other end of the lower beam body 11 is rotatably connected to a lower beam driven wheel set 14 for assisting the lower beam body 11 to move on the ground rail, the upper beam assembly 2 includes an upper beam body 21, both ends of the upper beam body 21 are rotatably connected to upper beam guide wheels 22 for assisting the lower beam drive motor 12 to move, both ends of the upper beam body 21 are also fixedly connected to an upper pulley set 23 for assisting counterweight and rope winding assembly 4 to lift the loading platform body 3, and both ends of the upper beam body 21 are also fixedly connected to anti-collision blocks 24; Specifically, this device moves horizontally along the ground track of the storage aisle. The movement is achieved by the lower beam assembly 1 and the upper beam assembly 2 working together. The lower beam drive motor 12 is installed at the drive end of the lower beam body 11 and drives the drive wheel 13 to rotate through the coupling. The lower beam driven wheel set 14 at the other end of the lower beam body 11 provides the main walking power in coordination with the guide. The upper beam guide wheels 22 at both ends of the upper beam body 21 roll along the overhead track at the top of the aisle to constrain the lateral offset of the upper part of the machine and prevent swaying or tilting during the operation of the ultra-long machine body, thus ensuring walking stability. The counterweight and rope winding assembly 4 pulls the loading platform body 3 up and down along the column through the upper pulley set 23 at both ends of the upper beam body 21 to perform storage and retrieval work. The loading platform body 3 is guided by multiple sets of side guide wheel assemblies 8 at both ends to fit against the column. With the help of the safety protection assembly 6, it can lock in time in case of overspeed, rope slack, or rope breakage, thus ensuring the safety of heavy-load lifting. During storage and retrieval, the two sets of fork assemblies 5 on the main body 3 of the loading platform extend simultaneously to lift the extra-long and heavy-load materials to complete the transfer of goods between the shelf and the loading platform. The double forks work together to prevent long materials from bending and deforming. In this invention, two sets of fork assemblies 5 can simultaneously carry and transport ultra-long materials (such as profiles, pipes, and plates) ranging from 6 to 12 meters in length, solving the problem that traditional stacker cranes cannot store or retrieve long, heavy-duty materials. It is equipped with independent safety protection mechanisms on both sides, along with multiple protections including overspeed, rope breakage, rope slack linkage triggering, and overspeed centrifugal locking. The braking response is fast, which can avoid the risk of heavy-duty falls and meet the requirements of high-load continuous operation. At the same time, by adopting a design with double-end travel of upper and lower crossbeams, double-sided guide wheels, and diagonal counterweight traction rope balance, the off-center load is small during travel and lifting, the running speed is fast, and the operation efficiency is greatly improved.

[0023] Example 2, please refer to Figure 1-9 The main body 3 of the loading platform includes a horizontal frame 31, which is fixedly connected to the lower beam body 11. Vertical frames 32 are fixedly connected to both sides of the horizontal frame 31. An upper frame 33 is fixedly connected between the two sets of vertical frames 32, and the upper frame 33 is located at the top of the two sets of vertical frames 32. An adjustable material detection mechanism is provided in the upper frame 33. Auxiliary pressure rollers 39 for assisting the movement of the main body 3 are also fixedly connected to the sides of the two sets of vertical frames 32 that are far apart from each other. The adjustable material detection mechanism includes a servo motor 34 fixedly connected to the upper frame 33 and two sets of synchronous pulleys 35 rotatably connected to the upper frame 33. The output end of the servo motor 34 is connected to one set of synchronous pulleys 35 via a coupling. A synchronous belt 36 is sleeved between the two sets of synchronous pulleys 35, and the two sets of synchronous pulleys 35 are connected by the synchronous belt 36. A guide rail 37 is also fixedly connected to the upper frame 33. The guide rail 37 is located directly below the timing belt 36. The adjustable material detection mechanism also includes two sets of detection switches 38. One set of detection switches 38 is fixedly connected to the guide rail 37, and the other set of detection switches 38 is fixedly connected to the timing belt 36 and slides on the guide rail 37. Both sets of fork assemblies 5 are fixedly connected to the horizontal frame 31 of the loading platform. Each set of fork assemblies 5 includes three fork bodies 51. Each fork body 51 includes a lower fork 52, a middle fork 53, and an upper fork 54. Fork 52, middle fork 53 and upper fork 54 are connected by a drive chain. A fork drive motor 55 is fixedly connected to the bottom of one set of lower forks 52, and the output end of the fork drive motor 55 is connected to the drive chain. A universal coupling 56 is fixedly connected between multiple sets of fork bodies 51. The multiple sets of fork bodies 51 achieve synchronous operation through the universal coupling 56. Each set of upper forks 54 is also fixedly connected to a fork hook 57 for fixing the goods on the end away from the fork body 51. Specifically, during the storage and retrieval operation, the servo motor 34 drives the synchronous wheel 35 to rotate, which in turn drives another set of synchronous wheels 35 to rotate synchronously via the synchronous belt 36. The detection switch 38, which is fixed on the synchronous belt 36, moves synchronously along the guide rail 37 to scan the material position, length, and off-center loading status on the main body 3 of the loading platform in real time. After the detection is completed, the slider automatically resets to the initial positions at both ends. The two sets of fork assemblies 5 move synchronously according to the detected material size. The fork drive motor 55 drives the transmission chain inside the lower fork 52 to run, driving the middle fork 53 and the upper fork 54 to extend in sequence, lifting the extra-long material to complete the transfer between the shelf and the main body of the loading platform 3. The upper fork 54 is equipped with a protruding hook structure at the end, which can effectively prevent the material from slipping. Furthermore, when loading and unloading shorter materials, such as 6-meter-long materials, one set of fork assembly 5 is activated for loading and unloading. When loading and unloading longer materials (such as 12-meter-long materials), two sets of fork assembly 5 are activated simultaneously. By controlling the synchronous drive of two sets of motors, the extension and retraction of the two sets of forks can be synchronized. When the material is short, the material is detected by the detection switch 38 fixed on the guide rail 37. When the material is long, the servo motor 34 drives the detection switch 38 connected to the synchronous belt 36 to move to the longest end of the material. The adjustable material detection mechanism realizes the detection of materials of different lengths, which greatly improves the applicability of the device. In this embodiment, by setting up two sets of fork assemblies 5 and an adjustable material detection mechanism on the main body of the loading platform 3, the device can adaptively identify materials of different lengths from 6 to 12 meters, automatically adjust the fork extension position and bearing point, without the need for manual preset parameters, and is compatible with extra-long materials such as profiles, pipes, and plates of different specifications.

[0024] Example 3, please refer to Figure 1 and Figure 2 The counterweight and rope winding assembly 4 includes a lifting motor 41, which is fixedly connected to one of the columns. The output end of the lifting motor 41 is fixedly connected to two sets of drums 42 via a coupling. A left traction rope 43 and a right traction rope 44 are wound on the two sets of drums 42 respectively. The left traction rope 43 is connected to the left side of the loading platform body 3 via a pulley, and the right traction rope 44 is connected to the right side of the loading platform body 3 via a pulley. Both the left traction rope 43 and the right traction rope 44 are connected to the safety protection assembly 6. The counterweight and rope assembly 4 also includes two sets of counterweight blocks 45, two sets of left counterweight traction ropes 46 and two sets of right counterweight traction ropes 47. The two sets of counterweight blocks 45 are respectively set in the two sets of columns. One end of each of the two sets of left counterweight traction ropes 46 is connected to the vertical frame 32 of the left and right loading platforms, and the other end is connected to the adjacent counterweight block 45. One end of each of the two sets of right counterweight traction ropes 47 is also connected to the vertical frame 32 of the left and right loading platforms, and the other end is connected to the adjacent counterweight block 45. In this embodiment, the left traction rope 43 and the right traction rope 44 are both wound on the same motor-driven drum 42, which structurally ensures the synchronous lifting and lowering of both ends of the loading platform body 3. The two sets of left counterweight traction ropes 46 are respectively connected to the left and right end loading platform vertical frames 32, and similarly, the right counterweight traction ropes 47 are also respectively connected to the left and right end loading platform vertical frames 32. One end of each counterweight traction rope is connected to the counterweight block 45, and the other end is connected to the loading platform vertical frame 32. This counterweight and rope winding arrangement further ensures the balance and stability of the lifting and lowering of the loading platform. The counterweight 45 and the connected rope are hidden in the tubular space inside the left and right columns. The compact arrangement effectively saves layout space, and the main body of the device is also more beautiful. The counterweight 45 is equipped with guide wheels to facilitate the sliding of the counterweight 45 inside the column. At the same time, the upper and lower parts of the column are equipped with inspection ports corresponding to the guide wheels and anti-collision blocks of the counterweight 45, which facilitate maintenance and repair. Furthermore, the counterweight 45 is also equipped with maintenance stop bar one and maintenance stop bar two. When the device is working normally, maintenance stop bars one and two are locked on the side of the column for standby. When maintenance is required, if the main body of the loading platform 3 is in a high position and the counterweight 45 is in a low position, maintenance stop bar two is inserted into the corresponding hole in the column to prevent the main body of the loading platform 3 from falling and to ensure maintenance safety. When the guide wheel on the counterweight 45 needs to be maintained, the counterweight 45 is in a high position and the main body of the loading platform 3 is in a low position. Maintenance stop bar one is inserted into the corresponding hole in the column to support the counterweight 45, and the guide wheel of the counterweight 45 can be maintained at the top.

[0025] Example 4, please refer to Figure 1-14Each safety protection component 6 includes a pull rod weldment 61, a lifting plate 62, a drive shaft 63, and a lifting plate 64. The pull rod weldment 61 is fixedly connected to the vertical frame 32 of the loading platform. The lifting plate 62 is mounted on the pull rod weldment 61. Both ends of the drive shaft 63 are hinged to the vertical frame 32 of the loading platform via hinge seats. The side of the lifting plate 62 closest to the drive shaft 63 is fixed to the drive shaft 63. The lifting plate 64 is fixedly connected to the end of the drive shaft 63 away from the lifting plate 62. The end of the lifting plate 64 away from the drive shaft 63 is connected to the safety clamp assembly 7. Multiple sets of connecting shafts are also fixedly connected to the drive shaft 63. One set of connecting shafts is hinged with a lifting rope 69, and the other end of the lifting rope 69 passes through... The horizontal frame 31 of the loading platform is connected to the safety protection component 6 on the other side of the vertical frame 32 of the loading platform. The safety protection component 6 also includes two sets of top rods 66, two sets of pressure plates 67 and a reverse rope pulley 68. The tops of the two sets of top rods 66 are connected to the wheel frame of the reverse rope pulley 68. The two sets of pressure plates 67 are respectively located directly below the adjacent top rods 66, and the end of each set of pressure plates 67 near the adjacent top rod 66 is connected to the bottom of the adjacent top rod 66. Each set of pressure plates 67 is hinged with a support frame, and the support frame is fixedly connected to the vertical frame 32 of the loading platform. Each set of pressure plates 67 is also hinged with a transmission rod 65 at the end away from the top rod 66. The ends of the two sets of transmission rods 65 away from the pressure plates 67 are respectively rotatably connected to the connecting shaft on the drive shaft 63. Safety protection component 6 consists of overspeed protection and rope breakage protection. The overspeed protection is as follows: When the main body 3 of the loading platform falls at excessive speed, the lifting plate 62 presses on the pull rod welded part 61. Under the restriction of the pull rod welded part 61, the lifting plate 62 rotates upward. The drive shaft 63 rotates simultaneously under the drive of the lifting plate 62 and drives the lifting plate 64 to pull upward. The lifting plate 64 drives the safety clamp assembly 7 to start and achieve the braking effect. Slack rope breakage protection is as follows: When the left traction rope 43 or the right traction rope 44 on the main body 3 of the loading platform becomes loose or breaks, the top rod 66 will press down the pressure plate 67. The pressure plate 67 is connected to the transmission rod 65. The pressed pressure plate 67 pushes up through the transmission rod 65, causing the drive shaft 63 to rotate at the same time, thereby driving the lifting plate 64 to pull up. The lifting plate 64 drives the safety clamp assembly 7 to start and achieve safety braking. At the same time, when the drive shaft 63 rotates, it pulls the lifting rope 69, which in turn pulls the drive shaft 63 on the opposite side to rotate, causing the safety clamp assembly 7 on the opposite side to start synchronously and achieve safe braking of the safety device on the opposite side. Through the synchronous action of the safety devices on both sides, safe braking on both sides is achieved simultaneously. Furthermore, the safety clamp assembly 7 includes a safety clamp bracket 71 fixedly connected to the vertical frame 32 of the loading platform. The safety clamp bracket 71 is provided with a sliding ramp 72 and a fixed ramp 73. The sliding ramp 72 is slidably connected to the safety clamp bracket 71, and the fixed ramp 73 is fixedly connected to the safety clamp bracket 71. A brake roller 74 is provided between the sliding ramp 72 and the fixed ramp 73. The top of the brake roller 74 is connected to the lifting plate 64. A groove for the column to slide is provided between the brake roller 74 and the sliding ramp 72. Two sets of support guide wheels 75 are also rotatably connected inside the safety clamp bracket 71. The two sets of support guide wheels 75 are located on the upper and lower sides of the sliding ramp 72, respectively, and both sets of support guide wheels 75 are in contact with the outer wall of the column. Specifically, when the drive shaft 63 rotates and pulls the lifting plate 64 upward, the lifting plate 64 simultaneously pulls the brake roller 74 upward. Due to the action of the sliding block 72 and the fixed block 73, the gap between the brake roller 74 and the column guide rail is quickly reduced and locked, thus achieving safe braking.

[0026] Example 5, please refer to Figure 1 , Figure 6 , Figure 15 , Figure 16 and Figure 17 Each set of side guide wheel assemblies 8 includes a main rotating shaft 81, which is fixedly connected to the vertical frame 32 of the loading platform. A guide wheel bracket 82 is rotatably connected to the end of each main rotating shaft 81 away from the vertical frame 32. Two sets of side guide wheel bodies 83 are rotatably connected to each guide wheel bracket 82. Multiple sets of side guide wheel bodies 83 are in contact with the outer wall of the column. The side guide wheel bodies 83 are hollow, and each set of side guide wheel bodies 83 has a reduction groove 84. A reduction assembly 9 is installed in each reduction groove 84. The reduction assembly 9 includes a synchronization disc 91 rotatably connected to the side guide wheel body 83. An adjustment disc 92 is fixedly connected to one side of the synchronization disc 91, and the side of the adjustment disc 92 away from the synchronization disc 91 is rotatably connected to the inner wall of the side guide wheel body 83 via a rotating shaft. Furthermore, a torsion spring is sleeved on the rotating shaft of the adjusting disc 92, and multiple sets of adjusting grooves 93 are opened on the adjusting disc 92. Each set of adjusting grooves 93 is slidably connected to a ceramic friction plate 94, and the end of each set of ceramic friction plates 94 away from the adjusting groove 93 passes through the side guide wheel body 83 and extends into the adjacent deceleration groove 84. The deceleration assembly 9 also includes two sets of centrifugal pawls 96 rotatably connected to the inner wall of the side guide wheel body 83. The two sets of centrifugal pawls 96 are centrally symmetrically arranged in the synchronous disc 91. A synchronous pull rod 97 is hinged between one end of the two sets of centrifugal pawls 96, and a return spring 98 is fixedly connected between the other ends. Multiple sets of evenly distributed limiting teeth 95 are also opened on the side of the synchronous disc 91 away from the adjusting disc 92, and the shape of the limiting teeth 95 is adapted to the claw hooks on the two sets of centrifugal pawls 96. Specifically, when the main body 3 of the loading platform is running stably, multiple sets of side guide wheel bodies 83 contact the outer wall of the column to assist the main body 3 of the loading platform in running stably. Multiple sets of ceramic friction plates 94 are contained in the deceleration groove 84 and do not contact the column. When the descent speed of the main body 3 of the loading platform is too fast, the side guide wheel body 83 drives the two sets of centrifugal pawls 96 inside to rotate faster and overcome the tension of the return spring 98 to be thrown outward and stuck in the limiting teeth 95 on the synchronous disc 91. At this time, the side guide wheel body 83 continues to rotate and drives the centrifugal pawls 96 to rotate. The centrifugal pawls 96 then drive the synchronous disc 91 to rotate. The synchronous disc 91 causes the adjusting disc 92 to rotate at the same time. The multiple sets of ceramic friction plates 94 expand outward under the limitation of the adjusting groove 93, extend out of the deceleration groove 84 and are flush with the side guide wheel body 83, and contact the surface of the column, increasing the friction between the side guide wheel body 83 and the column, so that the speed of the main body 3 of the loading platform decreases. When the speed of the main body 3 of the loading platform drops to a safe range, the rotation speed of the side guide wheel body 83 decreases, and the two sets of centrifugal pawls 96 reverse and reset under the drive of the reset spring 98, moving out of the adjustment groove 93. The adjustment plate 92 reverses and resets under the drive of the torsion spring, causing the multiple sets of ceramic friction plates 94 to retract. Furthermore, if the cargo platform body 3 continues to fall at high speed after being decelerated by the ceramic friction plate 94, the safety clamp assembly 7 will be triggered by the safety protection component 6 to brake and stop the cargo platform body 3. Meanwhile, the auxiliary pressure rollers 39 are in contact with the front of the left and right columns. The side guide wheel assemblies 8 are paired in pairs, one above the other, and abut against the sides of the left and right columns respectively. The side guide wheel assemblies 8 adopt a double-wheel floating structure. Each pair of side guide wheel assemblies 8 has four side guide wheel bodies 83 pressing against the side of the column. This is because the left and right columns are square tube structures, and the rigidity and strength of the middle section are relatively poor. The four sets of auxiliary pressure rollers 39 that are in contact with the column are arranged on the side of the column respectively. Like the side guide wheel bodies 83, they avoid the weak points of the column. On the one hand, the contact area is increased, and on the other hand, it ensures that the loading platform body 3 is in contact with the front of the column and will not cause the lifting and lowering movement of the loading platform body 3 to be stuck due to the deformation of the column. By setting a deceleration-then-braking mechanism, staged force relief is achieved, avoiding rigid impact. Specifically, in case of overspeed, the ceramic friction plate 94 is extended to increase the friction with the column, achieving soft deceleration. This reduces the descent speed of the main body 3 of the loading platform from overspeed to a safe speed range, avoiding the instantaneous impact caused by the direct locking of the safety clamp, and reducing damage to the loading platform structure, goods, and columns. At the same time, minor overspeed scenarios can be corrected through the pre-deceleration stage without triggering the safety clamp lock, significantly reducing the wear frequency of the safety clamp and reducing downtime. After the pre-deceleration is triggered, the ceramic friction plate 94 can automatically retract when the speed returns to the safe range, and the equipment can resume normal operation without stopping, greatly improving work efficiency.

[0027] The working principle of this invention is: In use, the drive wheel 13 is driven to rotate by the lower beam drive motor 12, and the lower beam driven wheel group 14 at the other end of the lower beam body 11 cooperates to guide it. The upper beam guide wheels 22 at both ends of the upper beam body 21 roll along the overhead rail at the top of the roadway to achieve horizontal movement, so that the whole device can move smoothly to the roadway where the target cargo location is located. After the vehicle is moved into place, the lifting motor 41 pulls the cargo platform body 3 vertically along the column through the upper pulley group 23 on the top of the upper beam body 21. The side guide wheel assemblies 8 on both sides of the cargo platform body 3 roll against the surface of the column to ensure that the lifting process is smooth and without shaking. At the same time, the counterweight traction ropes arranged diagonally connect the cargo platform body 3 with the counterweight block 45 in the column to offset the weight of the cargo platform body 3 and the cargo, balance the lifting load, and make the cargo platform body 3 accurately reach the target cargo position height. The adjustable detection mechanism on the top of the main body 3 of the loading platform automatically adjusts the detection points according to the size of the goods to be stored or retrieved, scans and confirms the position, length and off-center loading status of the goods, verifies the compatibility between the storage location and the goods, and triggers the fork action after confirming that the storage and retrieval conditions are met. Select the corresponding number of fork groups to start according to the length of the goods. The fork drive motor 55 drives the three-stage fork arms to extend synchronously. Multiple fork arms in the same fork group are connected by a synchronous linkage to ensure consistent action. The upper fork 54 supports the bottom of the goods to complete the transfer of goods between the shelf and the main body 3 of the loading platform. If the goods are long, the two fork groups will move synchronously. Multi-point bearing avoids deformation of long materials. During operation, the side guide wheel assembly 8 assists the main body of the loading platform 3 to operate stably. When the main body of the loading platform 3 descends too quickly, the centrifugal pawl 96 inside the side guide wheel assembly 83 rotates faster, overcomes the tension of the return spring 98 and is thrown outward, and gets stuck in the limiting teeth 95 on the synchronous disc 91, driving the synchronous disc 91 and the adjusting disc 92 to rotate, causing the ceramic friction plate 94 to extend from the deceleration groove 84 and contact the surface of the column, increasing the friction force and causing the speed of the main body of the loading platform 3 to decrease. When the speed drops to a safe range, the centrifugal pawl 96 reverses and resets under the action of the return spring 98, and the ceramic friction plate 94 retracts. If the loading platform body 3 continues to fall at high speed after being decelerated by the ceramic friction plate 94, the safety protection component 6 will trigger the safety clamp component 7 to brake. When the loading platform body 3 falls at excessive speed, the lifting plate 62 will rotate upward under the restriction of the pull rod weld 61, which will drive the drive shaft 63 to rotate, thereby causing the lifting plate 64 to pull up and drive the safety clamp component 7 to start braking. When the left traction rope 43 or the right traction rope 44 connecting the main body 3 of the loading platform becomes loose or breaks, the top rod 66 will press down the pressure plate 67, and through the transmission pull rod 65, the drive shaft 63 will rotate, driving the lifting plate 64 to pull up, activating the safety clamp assembly 7 for braking. At the same time, the drive shaft 63 will pull the lifting rope 69, so that the safety clamp assembly 7 on the opposite side will be activated synchronously, achieving simultaneous safety braking on both the left and right sides.

[0028] It should be noted that all the devices in this application are common devices on the market, and can be selected according to the needs of specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can easily implement it. It belongs to the prior art and will not be described in detail.

[0029] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An ultra-long heavy load palletizer characterized by: The system includes a lower beam assembly (1), an upper beam assembly (2), and a loading platform body (3). Two sets of columns are erected between the lower beam assembly (1) and the upper beam assembly (2), and the two sets of columns are located at the two ends of the lower beam assembly (1) and the upper beam assembly (2), respectively. The loading platform body (3) is set between the two sets of columns, and the two ends of the loading platform body (3) are slidably connected to the two sets of columns. The loading platform body (3) is also equipped with two sets of fork assemblies (5) for storing and retrieving extra-long goods. The two sets of columns are also equipped with counterweight and rope winding assemblies (4), and the output end of the counterweight and rope winding assemblies (4) is connected to the loading platform body (3). Both sides of the main body of the loading platform (3) are also provided with safety protection components (6) for the safety protection of the main body of the loading platform (3) and side guide wheel components (8) to assist the main body of the loading platform (3) in moving on the column.

2. A super-long heavy load material stacking machine according to claim 1, characterized in that: The lower beam assembly (1) includes a lower beam body (11), one end of which is fixedly connected to a lower beam drive motor (12), the output end of which is fixedly connected to a drive wheel (13) via a coupling, and the other end of which is rotatably connected to a lower beam driven wheel set (14) for assisting the lower beam body (11) to move on the ground rail. The upper beam assembly (2) includes an upper beam body (21). Both ends of the upper beam body (21) are rotatably connected to upper beam guide wheels (22) that assist the lower beam drive motor (12) in moving. Both ends of the upper beam body (21) are also fixedly connected to upper pulley groups (23) that assist counterweight and rope winding assembly (4) in lifting the cargo platform body (3). Both ends of the upper beam body (21) are also fixedly connected to anti-collision blocks (24).

3. The ultra-long heavy-duty material stacker according to claim 2, characterized in that: The main body of the loading platform (3) includes a horizontal frame (31) of the loading platform, which is fixedly connected to the lower beam body (11). Both sides of the horizontal frame (31) of the loading platform are fixedly connected to vertical frames (32). An upper frame (33) is fixedly connected between the two sets of vertical frames (32), and the upper frame (33) is located at the top of the two sets of vertical frames (32). An adjustable material detection mechanism is provided in the upper frame (33). The two sets of vertical frames (32) of the loading platform are also fixedly connected to auxiliary pressure rollers (39) for assisting the movement of the main body of the loading platform (3). The adjustable material detection mechanism includes a servo motor (34) fixedly connected to the upper frame (33) and two sets of synchronous pulleys (35) rotatably connected to the upper frame (33). The output end of the servo motor (34) is connected to one of the sets of synchronous pulleys (35) through a coupling. A synchronous belt (36) is sleeved between the two sets of synchronous pulleys (35). The two sets of synchronous pulleys (35) are connected by transmission through the synchronous belt (36). A guide rail (37) is also fixedly connected in the upper frame (33), and the guide rail (37) is located directly below the synchronous belt (36). The adjustable material detection mechanism also includes two sets of detection switches (38). One set of detection switches (38) is fixedly connected to the guide rail (37), and the other set of detection switches (38) is fixedly connected to the synchronous belt (36) and slides on the guide rail (37).

4. The ultra-long heavy-duty material stacker according to claim 3, characterized in that: Both sets of fork assemblies (5) are fixedly connected to the horizontal frame (31) of the loading platform. Each set of fork assemblies (5) includes three sets of fork bodies (51). Each set of fork bodies (51) includes a lower fork (52), a middle fork (53), and an upper fork (54). The lower fork (52), the middle fork (53), and the upper fork (54) are connected by a transmission chain. The bottom of one set of lower forks (52) is fixedly connected to a fork drive motor (55), and the output end of the fork drive motor (55) is connected to the transmission chain. A universal coupling (56) is fixedly connected between multiple sets of fork bodies (51). The multiple sets of fork bodies (51) achieve synchronous operation through the universal coupling (56). Each set of upper forks (54) is also fixedly connected to a fork hook (57) for fixing the goods on the end away from the fork body (51).

5. The ultra-long heavy-duty material stacker according to claim 1, characterized in that: The counterweight and rope winding assembly (4) includes a lifting motor (41), which is fixedly connected to one of the columns. The output end of the lifting motor (41) is fixedly connected to two sets of drums (42) through a coupling. The two sets of drums (42) are respectively wound with a left traction rope (43) and a right traction rope (44). The left traction rope (43) is connected to the left side of the loading platform body (3) through a pulley, and the right traction rope (44) is connected to the right side of the loading platform body (3) through a pulley. Both the left traction rope (43) and the right traction rope (44) are connected to the safety protection assembly (6). The counterweight and rope assembly (4) also includes two sets of counterweight blocks (45), two sets of left counterweight traction ropes (46) and two sets of right counterweight traction ropes (47). The two sets of counterweight blocks (45) are respectively set in the two sets of columns. One end of the two sets of left counterweight traction ropes (46) is connected to the vertical frame (32) of the left and right loading platform respectively, and the other end is connected to the adjacent counterweight block (45). One end of the two sets of right counterweight traction ropes (47) is also connected to the vertical frame (32) of the left and right loading platform respectively, and the other end is connected to the adjacent counterweight block (45).

6. The ultra-long heavy-duty material stacker according to claim 1, characterized in that: Each set of safety protection components (6) includes a pull rod weldment (61), a lifting plate (62), a drive shaft (63), and a lifting plate (64). The pull rod weldment (61) is fixedly connected to the vertical frame (32) of the loading platform. The lifting plate (62) is mounted on the pull rod weldment (61). Both ends of the drive shaft (63) are hinged to the vertical frame (32) of the loading platform through hinge seats. The side of the lifting plate (62) closest to the drive shaft (63) is fixed to the drive shaft (63). The lifting plate (64) is fixedly connected to one end of the drive shaft (63) away from the lifting plate (62), and the end of the lifting plate (64) away from the drive shaft (63) is connected to the safety clamp assembly (7). Multiple sets of connecting shafts are also fixedly connected to the drive shaft (63), one set of which is hinged with a lifting rope (69). The other end of the lifting rope (69) passes through the horizontal frame (31) of the loading platform and is connected to the safety protection assembly (6) on the other side of the vertical frame (32) of the loading platform. The safety protection component (6) also includes two sets of top rods (66), two sets of pressure plates (67), and a reverse rope wheel (68). The tops of the two sets of top rods (66) are connected to the wheel frame of the reverse rope wheel (68). The two sets of pressure plates (67) are respectively located directly below the adjacent top rods (66), and the end of each pressure plate (67) near the adjacent top rod (66) is connected to the bottom of the adjacent top rod (66). Each set of pressure plates (67) is hinged with a support frame, and the support frame is fixedly connected to the vertical frame (32) of the loading platform. The end of each set of pressure plates (67) away from the top rod (66) is also hinged with a transmission rod (65). The ends of the two sets of transmission rods (65) away from the pressure plate (67) are respectively rotatably connected to the connecting shaft on the drive shaft (63).

7. The ultra-long heavy-duty material stacker according to claim 6, characterized in that: The safety clamp assembly (7) includes a safety clamp bracket (71) fixedly connected to the vertical frame (32) of the loading platform. The safety clamp bracket (71) is provided with a sliding wedge (72) and a fixed wedge (73). The sliding wedge (72) is slidably connected to the safety clamp bracket (71), and the fixed wedge (73) is fixedly connected to the safety clamp bracket (71). A brake roller (74) is provided between the sliding wedge (72) and the fixed wedge (73). The top of the brake roller (74) is connected to the lifting plate (64). A groove for the column to slide is left between the brake roller (74) and the sliding wedge (72). The safety clamp bracket (71) is also rotatably connected to two sets of support guide wheels (75). The two sets of support guide wheels (75) are located on the upper and lower sides of the sliding inclined block (72), and both sets of support guide wheels (75) are in contact with the outer wall of the column.

8. The ultra-long heavy-duty material stacker according to claim 1, characterized in that: Each set of side guide wheel assemblies (8) includes a main shaft (81), each set of main shafts (81) is fixedly connected to the vertical frame (32) of the loading platform, and each set of main shafts (81) is rotatably connected to a guide wheel bracket (82) at the end away from the vertical frame (32) of the loading platform. Each set of guide wheel brackets (82) is rotatably connected to two sets of side guide wheel bodies (83), and multiple sets of side guide wheel bodies (83) are in contact with the outer wall of the column. The side guide wheel body (83) is hollow, and each set of side guide wheel bodies (83) is provided with a deceleration groove (84), and each set of deceleration grooves (84) is provided with a deceleration component (9).

9. The ultra-long heavy-duty material stacker according to claim 8, characterized in that: The deceleration assembly (9) includes a timing disc (91) rotatably connected to the side guide wheel body (83). An adjustment disc (92) is fixedly connected to one side of the timing disc (91). The side of the adjustment disc (92) away from the timing disc (91) is rotatably connected to the inner wall of the side guide wheel body (83) via a rotating shaft. A torsion spring is sleeved on the rotating shaft of the adjustment disc (92). Multiple sets of adjustment grooves (93) are opened on the adjustment disc (92). Each set of adjustment grooves (93) is slidably connected to a ceramic friction plate (94). The end of each set of ceramic friction plates (94) away from the adjustment groove (93) passes through the side guide wheel body (83) and extends into the adjacent deceleration groove (84). The deceleration assembly (9) also includes two sets of centrifugal pawls (96) rotatably connected to the inner wall of the side guide wheel body (83). The two sets of centrifugal pawls (96) are centrally symmetrically arranged in the synchronous disk (91). A synchronous pull rod (97) is hinged between one end of the two sets of centrifugal pawls (96), and a return spring (98) is fixedly connected between the other ends. Multiple sets of evenly distributed limiting teeth (95) are also provided on the side of the synchronous disk (91) away from the adjustment disk (92), and the shape of the limiting teeth (95) is adapted to the claw hooks on the two sets of centrifugal pawls (96).

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