Passage lifting type safety protection device

Abstract

The invention provides a platform lifting type safety protection device which comprises a shell stand column, two second-stage lifting cylinders and two lifting assemblies are arranged on the shell stand column, each lifting assembly comprises a lifting driving assembly and a manual / automatic switching assembly, each lifting driving assembly is connected with one second-stage lifting cylinder, and each second-stage lifting cylinder is connected with one automatic / manual switching assembly. The lifting driving assembly is detachably connected with the automatic / manual switching assembly; a plurality of pull ropes extend out of the deviating side faces of the two second-stage lifting cylinders from bottom to top, one ends of the pull ropes are connected with sliding assemblies arranged in the second-stage lifting cylinders in an up-down sliding mode, and the sliding assemblies are driven by the second-stage lifting cylinders through power transmission assemblies to ascend and descend synchronously with the second-stage lifting cylinders. According to the platform lifting type safety protection device, the original double-base design is creatively integrated, the original double-base design and the original double-base design are combined into one, and the double-side traction function is achieved under the same occupied area; operators can complete equipment unlocking only by means of the automatic / manual switching assembly, and then rapid and accurate opening of the evacuation channel is achieved.

Description

Technical Field

[0001] This invention belongs to the field of railway passenger station platform safety protection technology, specifically relating to a channel lifting safety protection device. Background Technology

[0002] With the high-quality development of China's railway industry, train speeds have continued to improve, passenger comfort has been significantly optimized, and station coverage networks have been continuously improved. Coupled with its core advantages of economy and convenience, railways have become the preferred mode of travel for the vast majority of passengers. However, the continuous growth in passenger traffic and the diversification of travel demands have also brought severe challenges to railway passenger transport departments: the difficulty of guiding passenger flow has increased, and the pressure on platform safety management has become prominent. Strengthening safety precautions and improving operational efficiency have become important directions for the industry's development. Summary of the Invention

[0003] To address the above problems, the present invention provides a channel lifting safety protection device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A platform lifting safety protection device includes a housing column, on which two secondary lifting cylinders and two sets of lifting components are provided. Each lifting component includes a lifting drive component and an automatic / manual switching component. The lifting drive component is connected to one of the secondary lifting cylinders, and the lifting drive component and the automatic / manual switching component are detachably connected to achieve switching between automatic and manual drive modes. Multiple pull ropes extend from bottom to top on the opposite sides of both secondary lifting cylinders. One end of each pull rope is connected to a sliding component that slides vertically inside the secondary lifting cylinder. The sliding component moves synchronously with the secondary lifting cylinder under the drive of the secondary lifting cylinder through a power transmission component.

[0005] Furthermore, the lifting drive assembly includes a counterweight assembly, a traction belt, and an automatic power assembly that are slidably mounted on the inner side wall of the housing column. One end of the traction belt is fixedly connected to the counterweight assembly, and the other end passes around the automatic power assembly and is fixedly connected to the sliding side of the secondary lifting cylinder. The automatic power assembly drives the lifting of the counterweight assembly and the secondary lifting cylinder through the traction belt. The automatic / manual switching assembly is detachably connected to the automatic power assembly. The weight of the counterweight assembly is greater than the total weight of the secondary lifting cylinder and all its components.

[0006] Furthermore, the automatic power assembly includes a motor mounted on the housing column, the motor being connected to a drive gear, the drive gear being meshed with a driven gear, the driven gear being coaxially connected to a synchronous pulley via a spline driven shaft, and the traction belt passing around the synchronous pulley.

[0007] Furthermore, the automatic / manual switching assembly includes a clutch retaining pawl and a clutch retaining pawl displacement assembly. A sleeve is coaxially fixedly connected to the clutch retaining pawl, and the sleeve is located on the side of the clutch retaining pawl away from the driven gear. The spline driven shaft coaxially passes through the clutch retaining pawl and the sleeve and is slidably disposed relative to each other. A clutch fixing plate is coaxially fixed to the sleeve, and the clutch retaining pawl displacement assembly is fixedly connected to the clutch fixing plate, so that the clutch retaining pawl and the clutch fixing plate can move axially along the spline driven shaft, thereby realizing a separable connection between the clutch retaining pawl and the opposite side of the driven gear.

[0008] Furthermore, the clutch fixing pawl displacement assembly includes a frame connecting seat and a manual drive assembly. The frame connecting seat is fixedly connected to the side of the clutch fixing plate away from the clutch fixing pawl. The manual drive assembly is rotatably disposed inside the housing column and includes a rotating shaft, which is an upper and lower eccentric connecting rod shaft. A sliding roller is coaxially fixed at the lower end of the rotating shaft. When the clutch fixing pawl is connected to the driven gear, the sliding roller is in close contact with and rolls along the arc-shaped inner rail surface of the frame connecting seat away from the clutch fixing plate. In this state, when the upper and lower eccentric connecting rod shaft drives the sliding roller to be fixed along the arc-shaped inner rail surface, the clutch fixing pawl can be separated from the driven gear, switching from manual to automatic mode. The upper vertical rod of the rotating shaft is rotatably connected to a wheel fixed on the connecting plate.

[0009] Furthermore, the clutch fixed pawl disk displacement assembly also includes a return spring, which is sleeved on the spline driven shaft and its two ends are respectively fixedly connected to the sleeve and the baffle located at the end of the spline driven shaft away from the driven gear.

[0010] Furthermore, the power transmission assembly includes a stroke compensation mechanism and a pulling assembly. The pulling assembly includes a secondary lifting belt top pulley and a secondary lifting belt bottom pulley, respectively fixed inside the housing column, and a secondary lifting belt surrounding the secondary lifting belt top pulley and the secondary lifting belt bottom pulley. The sliding assembly at the bottom is connected to the secondary lifting belt. The stroke compensation mechanism is located inside the housing column, fixedly connected to the inner wall of the housing column, and fixedly connected to one side of the secondary lifting belt. When the secondary lifting cylinder moves up and down, the stroke compensation mechanism pulls the secondary lifting belt to drive the sliding assembly to move in the same direction as the secondary lifting cylinder.

[0011] Furthermore, the travel compensation mechanism includes a lifting connecting plate. One end of the lifting connecting plate is connected to the inner wall of the housing column, and the other end is provided with a locking plate extending horizontally to the left and right sides to the secondary lifting belt. One end of the locking plate is fixedly connected to the lifting connecting plate, and the other end is provided with at least one cloth belt connecting plate. A cloth belt pressure plate is detachably connected to the vertical side of the cloth belt connecting plate, and the secondary lifting belt is fixed between the cloth belt pressure plate and the cloth belt connecting plate.

[0012] Furthermore, the sliding assembly includes an adaptive tension compensation mechanism, which is slidably connected to the slide rail via a linear slider; the adaptive tension compensation mechanism includes a connecting frame, inside which is a connecting shaft extending horizontally along the left-right direction of the secondary lifting cylinder; one end of the connecting shaft passes through the connecting frame and the secondary lifting cylinder in sequence and is connected to the rope connection structure; the other end of the connecting shaft is movably disposed inside the connecting frame; a spring is sleeved on the connecting shaft located inside the connecting frame; one end of the spring near the rope connection structure is directly or indirectly fixedly connected to the connecting frame, and the other end of the spring is directly or indirectly connected to the connecting shaft; a positioning mechanism for the sliding assembly is provided on the connecting frame.

[0013] Furthermore, the rope connection structure includes a rope connection seat with an open structure on the side away from the link frame and on both the top and bottom sides. A rope connector is embedded in the rope connection seat, and one side of the rope connector extends out from the open structure. At least one of the pull ropes is fixedly connected to the rope connector. The connecting shaft is fixedly connected to the rope connection seat.

[0014] The platform lifting safety protection device of this invention innovatively integrates the original double-base design, combining the two into one, and achieving dual-sided traction function within the same floor space. Using the manual / automatic lifting power mechanism of this invention, operators only need to turn a knob to unlock the equipment, thereby achieving rapid and precise opening of evacuation routes. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the platform lifting safety protection device described in this invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the internal structure of the platform lifting safety protection device described in this invention. Figure 2 .

[0017] Figure 3 A schematic diagram showing the connection between the automatic power component and the automatic / manual switching component when in automatic mode.

[0018] Figure 4 A schematic diagram showing the connection between the automatic power component and the automatic / manual switching component when in manual mode.

[0019] Figure 5 This is a schematic diagram of the external structure of the sliding component described in this invention.

[0020] Figure 6 This is a schematic diagram of the internal structure of the sliding component described in this invention.

[0021] Figure 7 This is a schematic diagram of the stroke compensation mechanism described in this invention.

[0022] Among them, 1-shell column, 2-secondary lifting cylinder, 3-pull rope, 4-traction belt, 10-linear slider, 11-slide rail, 12-spline driven shaft, 51-clutch fixing claw plate, 52-sleeve, 53-clutch fixing plate, 54-frame connecting seat, 55-rotating shaft, 56-sliding roller, 57-shaft wheel, 58-reset spring, 59-wrench, 61-motor, 62-drive gear, 63-driven gear, 64-synchronous belt pulley, 71-secondary lifting belt top pulley, 72-secondary lifting belt bottom pulley, 73-secondary lifting belt, 74-lifting connecting plate, 75-... - Locking plate, 76 - Fabric belt connecting plate, 77 - Fabric belt pressure plate, 78 - Guide screw, 79 - Locking screw, 80 - End plate, 81 - Connecting frame, 82 - Connecting shaft, 83 - Spring, 84 - Connecting shaft positioning plate, 85 - Positioning pressure plate, 86 - Slider positioning belt, 87 - Rope connecting seat, 88 - Rope connector, 89 - Rope connector buffer pad, 91 - Secondary lifting connecting block, 92 - Counterweight block, 511 - Disc body, 512 - Disc claw, 631 - Through hole, 811 - U-shaped frame, 812 - Cover plate, 813 - Buffer pad, 541 - Arc-shaped inner rail surface, 542 - Locking platform. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-7As shown, a platform lifting safety protection device includes a housing column 1, on which two secondary lifting cylinders 2 and two sets of lifting components are provided. The lifting components include a lifting drive component and an automatic / manual switching component. The lifting drive component is connected to one of the secondary lifting cylinders 2, and the lifting drive component and the automatic / manual switching component are detachably connected to realize the switching between automatic drive mode and manual drive mode of the lifting drive component. Multiple pull ropes 3 extend from bottom to top on the opposite sides of the two secondary lifting cylinders 2. One end of the pull rope 3 is connected to a sliding component that slides up and down inside the secondary lifting cylinder 2. The sliding component moves up and down synchronously with the secondary lifting cylinder 2 under the drive of the secondary lifting cylinder 2 through a power transmission component.

[0025] In some embodiments, the lifting drive assembly includes a counterweight assembly, a traction belt 4, and an automatic power assembly, all slidably mounted on the inner sidewall of the housing column 1. One end of the traction belt 4 is fixedly connected to the counterweight assembly, and the other end passes around the automatic power assembly and is fixedly connected to the sliding side of the secondary lifting cylinder 2. The automatic power assembly drives the counterweight assembly and the secondary lifting cylinder 2 to rise and fall via the traction belt 4. The automatic / manual switching assembly is detachably connected to the automatic power assembly. The weight of the counterweight assembly is greater than the total weight of the secondary lifting cylinder 2 and all its components. When switched to manual mode, the secondary lifting cylinder 2 rises under the gravity of the left counterweight assembly.

[0026] Specifically, the counterweight assembly includes a secondary lifting connecting block 91 and a counterweight block 92. The traction belt 4 is connected to the secondary lifting connecting block 91, and the secondary lifting connecting block 91 is fixedly connected to the counterweight block 92. A slide rail 11 is provided on the inner side wall of the housing column 1 where the secondary lifting cylinder 2 is connected. The counterweight block 92 is slidably connected to the slide rail 11 via a linear slider 10. The automatic power assembly includes a motor 61 mounted on the housing column 1. The motor 61 is connected to a drive gear 62, which is meshed with a driven gear 63. The driven gear 63 is coaxially connected to a synchronous pulley 64 via a spline driven shaft 10. The traction belt 4 passes around the synchronous pulley 64.

[0027] The number of synchronous pulleys 64 can be one, two, or more, to facilitate the connection between the traction belt 4 and the secondary lifting cylinder 2.

[0028] Furthermore, the automatic / manual switching assembly includes a clutch retaining pawl 51 and a clutch retaining pawl displacement assembly. A sleeve 52 is coaxially fixedly connected to the clutch retaining pawl 51. The sleeve 52 is located on the side of the clutch retaining pawl 51 away from the driven gear 63. The spline driven shaft 10 coaxially passes through the clutch retaining pawl 51 and the sleeve 52, and is slidably disposed relative to each other. A clutch fixing plate 53 is coaxially fixed to the sleeve 52. The clutch retaining pawl displacement assembly is fixedly connected to the clutch fixing plate 53, so that the clutch retaining pawl 51 and the clutch fixing plate 53 can move axially along the spline driven shaft 10, thereby realizing a detachable connection between the clutch retaining pawl 51 and the driven gear 63 on opposite sides.

[0029] In some embodiments, the clutch retaining pawl disc 51 includes a disc body 511, and a plurality of retaining pawls 512 are evenly distributed on one side of the disc body 511 near the driven gear 3. The driven gear 3 is provided with a plurality of through holes 531 into which the retaining pawls 512 extend. The retaining pawls 512 extend into the through holes 531, thereby restricting the rotation of the driven gear.

[0030] Preferably, the clutch fixing pawl disk displacement assembly includes a frame connecting seat 54 and a manual drive assembly. The frame connecting seat 54 is fixedly connected to the side of the clutch fixing plate 53 away from the clutch fixing pawl disk 51. The manual drive assembly is rotatably disposed inside the housing column 1 and includes a rotating shaft 55, which is an eccentric connecting rod shaft. A sliding roller 56 is coaxially fixed at the lower end of the rotating shaft 55. When the clutch fixing pawl disk 51 is connected to the driven gear 63, the sliding roller 56 is located on the frame connecting seat 54 away from the clutch fixing pawl disk 51. The arc-shaped inner rail surface 541 on one side of the fixed plate 53 is tightly attached to and rolls along the arc-shaped inner rail surface 541. A locking platform 542 is provided on the inner side of the arc-shaped inner rail surface 541. In this state, when the upper and lower eccentric connecting rod shaft drives the sliding roller 56 to roll along the arc-shaped inner rail surface 541 until it rolls to the locking platform 542 and is locked, the clutch fixing pawl 51 can be separated from the driven gear 63, and the manual state can be switched to the automatic state. When the rotating shaft is rotated in the opposite direction, the reset spring is released, and the clutch fixing pawl displacement assembly is pushed inward, so that the clutch pawl is connected to the driven gear, and the manual state is switched.

[0031] The rotating shaft 55 is indirectly connected to the inner side of the housing column 1 through a connecting plate. For the stability of the connection, the upper vertical rod of the rotating shaft 55 is rotatably connected to the axle wheel 57 fixed on the connecting plate.

[0032] In order to achieve automatic reset of the clutch retaining pawl 51, the clutch retaining pawl displacement assembly also includes a reset spring 58. The reset spring 58 is sleeved on the spline driven shaft 12, and its two ends are respectively fixedly connected to the sleeve 52 and the baffle located at the end of the spline driven shaft 12 away from the driven gear 63.

[0033] A wrench 59 is fixedly connected to the top of the rotating shaft 55 to facilitate the rotation of the rotating shaft 55.

[0034] In some embodiments, the power transmission assembly includes a stroke compensation mechanism and a pulling assembly. The pulling assembly includes a secondary lifting belt top pulley 71 and a secondary lifting belt bottom pulley 72, which are respectively fixed inside the housing column 1, and a secondary lifting belt 73 surrounding the secondary lifting belt top pulley 71 and the secondary lifting belt bottom pulley 72. The sliding assembly located at the bottom is connected to the secondary lifting belt 73. The stroke compensation mechanism is located inside the housing column 1, fixedly connected to the inner wall of the housing column 1, and fixedly connected to one side of the secondary lifting belt 73. When the secondary lifting cylinder 2 moves up and down, the stroke compensation mechanism pulls the secondary lifting belt 73 to drive the sliding assembly to move in the same direction as the secondary lifting cylinder 2.

[0035] Preferably, the travel compensation mechanism includes a lifting connecting plate 74, one end of which is connected to the inner wall of the housing column 1, and the other end is provided with a connector extending horizontally to the left and / or right to the secondary lifting belt 73, and the connector is connected to the secondary lifting belt 73.

[0036] More preferably, the connector includes a locking plate 75, one end of which is fixedly connected to the lifting connecting plate 74, and the other end is provided with at least a cloth belt connecting plate 76. A cloth belt pressure plate 77 is detachably connected to the vertical side of the cloth belt connecting plate 76, and the secondary lifting belt 73 is sandwiched between the cloth belt connecting plate 76 and the cloth belt pressure plate 77.

[0037] To better suit the platform lifting safety protection device of the present invention, the lifting connecting plate 74 is disposed between the two secondary lifting cylinders 2, and locking plates 75 are provided on both its left and right sides near the end of the secondary lifting belt 73. The two locking plates 75 are stacked near the end of the lifting connecting plate 74 and are connected to the front end of the lifting connecting plate 74 by bolts.

[0038] More preferably, there are two fabric tape connecting plates 76, which are arranged one above the other and connected by the locking screw 77 and the guide screw 78.

[0039] The synchronous lifting structure of the two-stage lifting mechanism in the platform lifting device of this invention represents a significant technological breakthrough and optimization compared to traditional two-stage lifting railway station safety doors. Firstly, the lifting height is coordinated and unified, abandoning the original segmented independent adjustment mode. Synchronous lifting of the two-stage lifting structure ensures consistent overall door height adjustment, effectively avoiding the problem of inconsistent heights after adjustment in traditional models. This significantly improves the accuracy of adapting to different train car heights. Secondly, the operation is simple and easy to use, revolutionizing the cumbersome multi-step unlocking and segmented control process. An integrated control design allows operators to easily adjust the height without requiring specialized skills, greatly lowering the operational threshold and enabling rapid response to dispatching needs during peak passenger flow and emergency scenarios. Thirdly, it integrates belt tensioning function, combining the belt tensioning mechanism with the lifting system into one design. This eliminates the need for additional tensioning adjustment components in traditional models, which not only greatly simplifies the internal structure of the equipment, reduces the number of parts and coupling, lowers the probability of failure and maintenance costs, but also ensures the stability and smoothness of the lifting process, achieving a dual improvement in functionality and practicality.

[0040] In some embodiments, the sliding component includes an adaptive tension compensation mechanism, which is slidably connected to the slide rail 11 via a linear slider 10, and is connected to the pull rope 3 via a rope connection structure.

[0041] Specifically, the adaptive tension compensation mechanism includes a connecting frame 81. Inside the connecting frame 81, a connecting shaft 82 extends horizontally along the left-right direction of the secondary lifting cylinder 2. One end of the connecting shaft 82 passes through the connecting frame 81 and the secondary lifting cylinder 2 in sequence and is connected to the rope connection structure. The other end of the connecting shaft 82 is movably disposed inside the connecting frame 81. A spring 83 is sleeved on the connecting shaft 82 located inside the connecting frame 81. One end of the spring 83 near the rope connection structure is directly or indirectly fixedly connected to the connecting frame 81, and the other end of the spring 83 is directly or indirectly connected to the connecting shaft 82.

[0042] Preferably, an end plate 80 is fixed to the free movable end of the connecting shaft 82, and the same-side end of the spring 83 is fixedly connected to the end plate; a connecting shaft positioning plate 84 is fixed on the inner side of the side plate of the connecting frame 81 through which the connecting shaft 82 passes, the connecting shaft 82 passes through the connecting shaft positioning plate 84, and one end of the spring 83 is fixedly connected to the connecting shaft positioning plate 84.

[0043] Specifically, the connecting frame 81 includes a U-shaped frame 811 with its open end facing the front side of the secondary lifting cylinder 2, a cover plate 812 fixed at the opening of the U-shaped frame 811, and a buffer pad 813 fixed at the top and / or bottom of the U-shaped frame 811.

[0044] The positioning mechanism includes a positioning pressure plate 85 fixed on the outer side of the connecting frame 81, and a slider positioning band 86 connected between the plurality of sliding components. The slider positioning band 86 is connected to the connecting frame 81 by clamping the positioning pressure plate 85 and the cover plate 812.

[0045] The rope connection structure includes a rope connection seat 87 with an open structure on the side away from the connecting frame 81 and on both the top and bottom sides. A rope connector 88 is embedded in the rope connection seat 87, with one side of the rope connector 88 extending out from the open structure. At least one of the pull ropes 3 is fixedly connected to the rope connector 88. The connecting shaft 82 is fixedly connected to the rope connection seat 87. Rope connector buffer pads 89 are detachably connected to both the top and bottom ends of the rope connection seat 87.

[0046] Preferably, an adaptive tension compensation mechanism is used to connect with the platform screen door isolation strip. Based on the spring 83 compensation technology, the tension optimization of the rail transit isolation strip rope is achieved by installing the adaptive tension compensation mechanism of this invention at one or both fixed points of the isolation strip. Utilizing the elastic deformation characteristics of spring 83, the mechanism absorbs in real time the length changes of the isolation strip caused by external force stretching, temperature changes, and material creep. When the isolation strip elongates, spring 83 contracts to pull the rope to prevent slack; when the rope is taut, spring 83 releases the elongation to buffer the peak tension, thus automatically maintaining the tension within the optimal range and fundamentally solving the problems of slack sagging and excessive tension breakage. This technology has the advantages of low cost and easy maintenance (simple structure without complex electrical control components, suitable for the harsh environment of high passenger flow and high vibration in rail transit), strong compatibility (can be directly installed on existing isolation columns without large-scale modification), and high stability (the elastic tension of spring 83 is long-lasting, maintaining the protective shape of the isolation strip for a long time).

[0047] Those skilled in the art should understand that the above description is merely a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A platform lifting safety protection device, characterized in that, The device includes a housing column, on which two secondary lifting cylinders and two sets of lifting components are mounted. Each lifting component includes a lifting drive component and an automatic / manual switching component. The lifting drive component is connected to one of the secondary lifting cylinders and is detachably connected to the automatic / manual switching component to switch between automatic and manual drive modes. Multiple pull ropes extend from bottom to top on the opposite sides of both secondary lifting cylinders. One end of each pull rope is connected to a sliding component that slides vertically inside the secondary lifting cylinder. The sliding component moves synchronously with the secondary lifting cylinder under the drive of the secondary lifting cylinder through a power transmission component.

2. The platform lifting safety protection device according to claim 1, characterized in that, The lifting drive assembly includes a counterweight assembly, a traction belt, and an automatic power assembly that are slidably mounted on the inner side wall of the housing column. One end of the traction belt is fixedly connected to the counterweight assembly, and the other end passes around the automatic power assembly and is fixedly connected to the sliding side of the secondary lifting cylinder. The automatic power assembly drives the lifting of the counterweight assembly and the secondary lifting cylinder through the traction belt. The automatic / manual switching assembly is detachably connected to the automatic power assembly. The weight of the counterweight assembly is greater than the total weight of the secondary lifting cylinder and all its parts.

3. The platform lifting safety protection device according to claim 2, characterized in that, The automatic power assembly includes a motor mounted on the housing column, the motor being connected to a drive gear, the drive gear being meshed with a driven gear, the driven gear being coaxially connected to a synchronous pulley via a spline driven shaft, and the traction belt passing around the synchronous pulley.

4. The platform lifting safety protection device according to claim 3, characterized in that, The automatic / manual switching assembly includes a clutch retaining pawl and a clutch retaining pawl displacement assembly. A sleeve is coaxially fixedly connected to the clutch retaining pawl, and the sleeve is located on the side of the clutch retaining pawl away from the driven gear. The spline driven shaft coaxially passes through the clutch retaining pawl and the sleeve and is slidably disposed relative to each other. A clutch fixing plate is coaxially fixed to the sleeve, and the clutch retaining pawl displacement assembly is fixedly connected to the clutch fixing plate. The clutch retaining pawl and the clutch fixing plate can move axially along the spline driven shaft to achieve a separable connection between the clutch retaining pawl and the opposite side of the driven gear.

5. The platform lifting safety protection device according to claim 4, characterized in that, The clutch fixing pawl displacement assembly includes a frame connecting seat and a manual drive assembly. The frame connecting seat is fixedly connected to the side of the clutch fixing plate away from the clutch fixing pawl. The manual drive assembly is rotatably disposed inside the housing column and includes a rotating shaft, which is an upper and lower eccentric connecting rod shaft. A sliding roller is coaxially fixed at the lower end of the rotating shaft. When the clutch fixing pawl is connected to the driven gear, the sliding roller is in close contact with and rolls along the arc-shaped inner rail surface of the frame connecting seat away from the clutch fixing plate. In this state, when the upper and lower eccentric connecting rod shaft drives the sliding roller to be fixed along the arc-shaped inner rail surface, the clutch fixing pawl can be separated from the driven gear, switching from manual to automatic mode. The upper vertical rod of the rotating shaft is rotatably connected to a wheel fixed on the connecting plate.

6. The platform lifting safety protection device according to claim 5, characterized in that, The clutch fixed pawl disk displacement assembly also includes a return spring, which is sleeved on the spline driven shaft and its two ends are fixedly connected to the sleeve and the baffle located at the end of the spline driven shaft away from the driven gear, respectively.

7. The platform lifting safety protection device according to claim 1, characterized in that, The power transmission assembly includes a stroke compensation mechanism and a pulling assembly. The pulling assembly includes a secondary lifting belt top pulley and a secondary lifting belt bottom pulley fixed inside the housing column, and a secondary lifting belt surrounding the secondary lifting belt top pulley and the secondary lifting belt bottom pulley. The sliding assembly at the bottom is connected to the secondary lifting belt. The stroke compensation mechanism is located inside the housing column, fixedly connected to the inner wall of the housing column, and fixedly connected to one side of the secondary lifting belt. When the secondary lifting cylinder moves up and down, the stroke compensation mechanism pulls the secondary lifting belt to drive the sliding assembly to move in the same direction as the secondary lifting cylinder.

8. The platform lifting safety protection device according to claim 7, characterized in that, The travel compensation mechanism includes a lifting connecting plate. One end of the lifting connecting plate is connected to the inner wall of the housing column, and the other end is provided with a locking plate that extends horizontally to the left and right sides to the secondary lifting belt. One end of the locking plate is fixedly connected to the lifting connecting plate, and the other end is provided with at least one cloth belt connecting plate. A cloth belt pressure plate is detachably connected to the vertical side of the cloth belt connecting plate, and the secondary lifting belt is fixed between the cloth belt pressure plate and the cloth belt connecting plate.

9. The platform lifting safety protection device according to claim 1, characterized in that, The sliding assembly includes an adaptive tension compensation mechanism, which is slidably connected to the slide rail via a linear slider. The adaptive tension compensation mechanism includes a connecting frame, inside which is a connecting shaft extending horizontally along the left-right direction of the secondary lifting cylinder. One end of the connecting shaft passes through the connecting frame and the secondary lifting cylinder in sequence and is connected to the rope connection structure. The other end of the connecting shaft is movably disposed inside the connecting frame. A spring is sleeved on the connecting shaft located inside the connecting frame. The end of the spring near the rope connection structure is directly or indirectly fixedly connected to the connecting frame, and the other end of the spring is directly or indirectly connected to the connecting shaft. A positioning mechanism for the sliding assembly is provided on the connecting frame.

10. The platform lifting safety protection device according to claim 9, characterized in that, The rope connection structure includes a rope connection seat with an open structure on the side away from the link frame and on both the top and bottom sides. A rope connector is embedded in the rope connection seat, and one side of the rope connector extends out from the open structure. At least one of the pull ropes is fixedly connected to the rope connector. The connecting shaft is fixedly connected to the rope connection seat.

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