A column structure for lifting platform door

Abstract

The present invention discloses a column structure for a lifting platform door, belonging to the technical field of platform doors. The column structure includes a column body, a lifting assembly and a safety rope assembly. The lifting assembly includes a motor, a screw and a slider for installing the platform door. The safety rope assembly includes a safety rope, a limit plate and a positioning ring, one end of the safety rope is connected to the slider, the limit plate is fixedly mounted on the column body, the limit plate has a through hole, the safety rope movably passes through the through hole, the positioning ring is fixedly sleeved on the other end of the safety rope, the positioning ring has a gear lever, a speed sensor, a driving member and a controller, the gear lever can be movably arranged on the positioning ring, and the driving member is connected to the gear lever in a transmission manner. A column structure for a lifting platform door provided in an embodiment of the present invention can achieve a double insurance effect through a lifting assembly and a safety rope assembly, effectively avoiding the problem of the platform door hitting passengers due to the rapid drop of gravity, thereby avoiding the occurrence of safety accidents.

Description

Technical Field

[0001] The present invention belongs to the technical field of platform doors, and more specifically, relates to a column structure for a lifting platform door. Background Art

[0002] Many high-speed railway stations, intercity train stations, and subway stations are equipped with platform doors. Before the train arrives, passengers are isolated outside the platform doors to ensure their safety. When the train arrives and departs, the platform doors can open and close automatically, mechanically isolating the driving space from the passenger waiting space, creating a safe and comfortable waiting environment for passengers.

[0003] In the related art, the lifting platform door is opened and closed by lifting. It has a stable structure and can be applied to a variety of vehicle models, and is becoming more and more popular.

[0004] However, the platform doors of existing lifting platform doors are raised and lowered by transmission ropes. When the transmission rope fails during the descent process (for example, the transmission rope itself breaks or the connection between the transmission rope and the platform door fails), the platform door will drop rapidly due to gravity, which can easily cause passengers to be injured. Summary of the invention

[0005] In response to the above defects or improvement needs of the prior art, the present invention provides a column structure for a lift-type platform door, which has multiple redundancy, high reliability, and safety protection measures throughout the entire operation process, constructs an interlocking linkage between the lifting component and the safety rope component, and constructs a weight-balanced closed-loop linkage mechanism throughout the operation process of the lift-type platform door. Its purpose is to achieve double insurance effects through the lifting component and the safety rope component, thereby improving the fault tolerance of the safe operation of the lift-type platform door, increasing the reliability and confidence of the safety protection, and effectively avoiding the problem of the platform door injuring passengers due to the rapid drop of gravity, thereby avoiding the occurrence of safety accidents.

[0006] The present invention provides a column structure for a lifting platform door, the column structure comprising a column body, a lifting assembly and a safety rope assembly;

[0007] The lifting assembly includes a motor, a screw rod and a slider for installing the platform door, the motor is located on the column body, the output end of the motor is coaxial with one end of the screw rod and is transmission-connected, the other end of the screw rod is threadedly matched with the slider, the slider is slidably arranged on the column body, and the sliding direction of the slider extends along the vertical direction;

[0008] The safety rope assembly includes a safety rope, a limit plate and a positioning ring, one end of the safety rope is connected to the slider, the limit plate is fixedly mounted on the column body, the limit plate has a through hole, the safety rope movably passes through the through hole, the positioning ring is fixedly sleeved on the other end of the safety rope, the positioning ring and the slider are located on both sides of the limit plate, the positioning ring has at least one gear lever, a speed sensor, a driving member and a controller, the gear lever is movably arranged on the positioning ring, and the driving member is transmission-connected to the gear lever, the speed sensor, the controller and the driving member are electrically connected in sequence, the gear lever is configured such that when the displacement speed of the positioning ring exceeds a threshold value, the gear lever radially extends from the positioning ring to limit the gear lever from passing through the through hole, and when the displacement speed of the positioning ring does not exceed the threshold value, the gear lever and the positioning ring pass through the through hole.

[0009] Optionally, the column structure also includes a counterweight assembly, which includes a counterweight block, a gear and a chain. The counterweight block can be raised and lowered on the column body, and the gear can be rotatably arranged on the top of the column body. The chain is meshed with the gear, and both ends of the chain extend downward and are respectively connected to the slider and the counterweight block.

[0010] Optionally, the counterweight assembly further includes a synchronous wheel and a belt, wherein the synchronous wheel is rotatably arranged at the bottom of the column body, the belt is slidably engaged with the synchronous wheel, and both ends of the belt extend upward and are respectively connected to the counterweight block and the slider.

[0011] Optionally, the safety rope assembly further includes a fixed pulley, which is rotatably arranged on the top of the column body, the safety rope is slidably engaged with the fixed pulley, and both ends of the safety rope extend downward.

[0012] Optionally, the positioning ring is provided with radially arranged limiting holes, the shift rod can be slidably inserted in the limiting hole, and one end of the shift rod is transmission-connected to the driving member to extend out of the positioning ring through the limiting hole.

[0013] Optionally, one end of the gear lever is hinged to the outer wall of the positioning ring, and the other end of the gear lever is hinged to the driving member to unfold the gear lever.

[0014] Optionally, there are multiple shift rods, and the multiple shift rods are arranged at intervals along the circumference of the positioning ring.

[0015] Optionally, the lifting assembly further comprises a screw seat, the screw seat is transmission-connected to the slider, and the screw seat and the screw thread are matched.

[0016] Optionally, the screw seat has a tenon, the slider has a mortise, and the tenon and the mortise and tenon joint cooperate with each other.

[0017] Optionally, the column body is provided with a baffle, the baffle is arranged vertically, the baffle is provided with a vertically arranged slide rail, and the sliding block is slidably arranged on the slide rail.

[0018] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0019] In the column structure for a lifting platform door provided by the embodiment of the present invention, when the motor drives the screw rod to rotate forward, the screw rod converts the rotational motion into the linear motion of the slider, thereby driving the platform door to rise, that is, automatically completing the opening of the platform door. When the motor drives the screw rod to rotate reversely, it drives the platform door to descend, that is, automatically completing the closing of the platform door.

[0020] On the one hand, since the platform door is driven by a slider and a screw, and the slider and the screw are threaded together, the slider and the screw have transmission and self-locking functions in the axial direction, the platform door will not drop rapidly due to gravity.

[0021] On the other hand, the speed sensor can detect the speed of the positioning ring in real time. Even if the transmission of the slider and the screw fails, and the platform door drops rapidly due to gravity (greater than the normal descending speed of the safety rope, the positioning ring and the platform door, that is, exceeding the threshold, which can be set manually), the speed sensor will transmit the speed signal to the controller, and the controller will control the driving member to act on the gear lever, so that the gear lever extends radially from the positioning ring to limit the gear lever from passing through the through hole, that is, the safety rope of the platform door is stuck on the limit plate during the descent process, so that the platform door stops further descending, thereby also preventing the platform door from falling rapidly due to gravity. Similarly, when the slider and the screw are transmitting normally, the descending speed of the safety rope, the positioning ring and the platform door does not exceed the threshold, the speed sensor will transmit the speed signal to the controller, and the controller will not control the action of the driving member, so that the gear lever and the positioning ring can pass through the through hole smoothly without triggering the action of the gear lever (at this time, the platform door descends normally).

[0022] That is to say, the column structure for a lifting platform door provided in an embodiment of the present invention can achieve a double insurance function through a lifting assembly and a safety rope assembly, effectively preventing the platform door from injuring passengers due to a rapid drop due to gravity, thereby avoiding the occurrence of safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a column structure for a lifting platform door provided by an embodiment of the present invention;

[0024] Figure 2 is a schematic structural diagram of a safety rope assembly provided by an embodiment of the present invention;

[0025] Figure 3 is a schematic diagram of the assembly of a latch provided in an embodiment of the present invention;

[0026] Figure 4 is a schematic diagram of an assembly of a gear lever provided by an embodiment of the present invention;

[0027] Figure 5 It is a partial enlarged view of the lifting assembly provided in an embodiment of the present invention.

[0028] The symbols in the figure mean the following:

[0029] 1. Column body; 11. Latch; 2. Lifting assembly; 21. Motor; 22. Screw; 23. Slider; 24. Screw seat; 25. Tenon; 26. Mortise; 27. Baffle; 271. Slide rail; 28. Connecting plate; 3. Safety rope assembly; 31. Safety rope; 32. Limit plate; 321. Through hole; 33. Positioning ring; 331. Shift rod; 332. Limit hole; 34. Fixed pulley; 4. Counterweight assembly; 41. Counterweight block; 42. Gear; 43. Chain; 44. Synchronous wheel; 45. Belt; 100. Platform door. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] Figure 1 is a structural schematic diagram of a column structure for a lifting platform door provided by an embodiment of the present invention, such as Figure 1 As shown, the column structure includes a column body 1, a lifting assembly 2 and a safety rope assembly 3.

[0036] The lifting assembly 2 includes a motor 21, a screw rod 22 and a slider 23 for installing the platform door 100. The motor 21 is located on the column body 1. The output end of the motor 21 is coaxial with one end of the screw rod 22 and is transmission-connected. The other end of the screw rod 22 is threadedly engaged with the slider 23. The slider 23 is slidably arranged on the column body 1, and the sliding direction of the slider 23 extends along the vertical direction.

[0037] Figure 2 is a schematic diagram of the structure of a safety rope assembly provided by an embodiment of the present invention, such as Figure 2As shown, the safety rope assembly 3 includes a safety rope 31, a limiting plate 32 and a positioning ring 33. One end of the safety rope 31 is connected to the slider 23. The limiting plate 32 is fixedly installed on the column body 1. The limiting plate 32 has a through hole 321. The safety rope 31 movably passes through the through hole 321. The positioning ring 33 is fixedly sleeved on the other end of the safety rope 31. The positioning ring 33 and the slider 23 are located on both sides of the limiting plate 32. The positioning ring 33 has at least one gear lever 331, a speed sensor, and a driving member. and a controller (not shown), the gear rod 331 is movably arranged on the positioning ring 33, and the driving member is transmission-connected to the gear rod 331, the speed sensor, the controller and the driving member are electrically connected in sequence, the gear rod 331 is configured so that when the displacement speed of the positioning ring 33 exceeds a threshold value, the gear rod 331 radially extends from the positioning ring 33 to limit the gear rod 331 from passing through the through hole 321, and when the displacement speed of the positioning ring 33 does not exceed the threshold value, the gear rod 331 and the positioning ring 33 pass through the through hole 321.

[0038] For a column structure for a lifting platform door provided by an embodiment of the present invention, when the motor 21 drives the screw rod 22 to rotate forward, the screw rod 22 converts the rotational motion into the linear motion of the slider 23, thereby driving the platform door 100 to rise, that is, automatically completing the opening of the platform door 100. When the motor 21 drives the screw rod 22 to rotate reversely, it drives the platform door 100 to descend, that is, automatically completing the closing of the platform door 100.

[0039] On the one hand, since the platform door 100 is driven by the slider 23 and the screw rod 22, and the slider 23 and the screw rod 22 are threadedly matched, the slider 23 and the screw rod 22 have transmission and self-locking functions in the axial direction, the platform door 100 will not drop rapidly due to gravity.

[0040] On the other hand, the speed sensor can detect the speed of the positioning ring 33 in real time. Even if the transmission between the slider 23 and the screw rod 22 fails, and the platform door 100 drops rapidly due to gravity (greater than the normal descending speed of the safety rope 31, the positioning ring 33 and the platform door 100, that is, exceeding the threshold, which can be set manually), the speed sensor will transmit the speed signal to the controller, and the controller will control the driving member to act on the gear lever 331, so that the gear lever 331 extends radially from the positioning ring 33 to limit the gear lever 331 from passing through the through hole 321, that is, the safety rope 31 of the platform door 100 is stuck on the limit plate 32 during the descent of the platform door 100, so that the platform door 100 stops further descending, thereby also preventing the platform door 100 from dropping rapidly due to gravity. Similarly, when the slider 23 and the screw rod 22 are transmitting normally, the descending speed of the safety rope 31, the positioning ring 33 and the platform door 100 does not exceed the threshold value, and the speed sensor will transmit the speed signal to the controller, and the controller will not control the action of the driving component, so that the gear lever 331 and the positioning ring 33 can pass through the through hole 321 smoothly without triggering the action of the gear lever 331 (at this time, the platform door 100 descends normally or remains open).

[0041] That is to say, the column structure for a lifting platform door provided in an embodiment of the present invention can achieve a double insurance effect through the lifting component 2 and the safety rope component 3, effectively preventing the platform door 100 from injuring passengers due to the rapid drop of gravity, thereby avoiding the occurrence of safety accidents.

[0042] For example, before the platform door 100 descends, the distance between the positioning ring 33 and the limiting plate 32 may be 100-200 mm. Thereafter, the positioning ring 33 moves toward the limiting plate 32 .

[0043] See again Figure 1 The column structure also includes a counterweight assembly 4, which includes a counterweight block 41, a gear 42 and a chain 43. The counterweight block 41 can be raised and lowered on the column body 1, and the gear 42 can be rotatably arranged on the top of the column body 1. The chain 43 is meshed with the gear 42. Both ends of the chain 43 extend downward and are respectively connected to the slider 23 and the counterweight block 41.

[0044] In the above embodiment, the gravity of the counterweight 41 exerts an upward force on the slider 23 and the platform door 100 , thereby preventing the platform door 100 from falling rapidly due to gravity.

[0045] It is easy to understand that the present invention can achieve triple protection through the lifting assembly 2, the safety rope assembly 3 and the counterweight assembly 4, effectively avoiding the problem of the platform door 100 falling rapidly due to gravity and injuring passengers, greatly improving the reliability of the device.

[0046] In addition, the meshing of the gear 42 and the chain 43 and the threaded matching of the lead screw 22 and the slider 23 can improve the transmission efficiency and reduce energy consumption.

[0047] Furthermore, the counterweight assembly 4 also includes a synchronous wheel 44 and a belt 45. The synchronous wheel 44 is rotatably arranged at the bottom of the column body 1. The belt 45 is slidably matched with the synchronous wheel 44. Both ends of the belt 45 extend upward and are respectively connected to the counterweight block 41 and the slider 23.

[0048] In the above embodiment, under the guidance of the synchronous wheel 44, the belt 45 can move with the counterweight 41 and the slider 23, thereby ensuring the transmission stability of the counterweight 41 and the slider 23 and preventing them from swinging.

[0049] For example, the number of the synchronous wheels 44 may be two, and the two synchronous wheels 44 are arranged at intervals.

[0050] In this embodiment, the safety rope assembly 3 further includes a fixed pulley 34 (see Figure 3 ), the fixed pulley 34 is rotatably arranged on the top of the column body 1, the safety rope 31 is slidably matched with the fixed pulley 34, and the two ends of the safety rope 31 extend downward.

[0051] In the above embodiment, the fixed pulley 34 can extend the other end of the safety rope 31 to the other side of the slider 23, which can not only support the movement of the safety rope 31, but also reduce the size of the column body 1 in the vertical direction, thereby improving the space utilization of the column body 1.

[0052] Exemplarily, a latch pin 11 is inserted into the top of the column body 1, and the gear 42 and the fixed pulley 34 are rotatably mounted on the latch pin 11, and the gear 42 and the fixed pulley 34 are arranged at intervals.

[0053] See again Figure 2 In one implementation of the present invention, one end of the shift rod 331 is hinged on the outer wall of the positioning ring 33 , and the other end of the shift rod 331 is hinged to the driving member to unfold the shift rod 331 .

[0054] In the above embodiment, the bottom end of the shift rod 331 can be driven to swing outward by the driving member, so that the bottom end of the shift rod 331 moves in the direction away from the positioning ring 33, and the shift rod 331 can be abutted against the bottom surface of the limiting plate 32, thereby finally achieving the limitation of the positioning ring 33, the safety rope 31 and the slider 23.

[0055] Figure 4 is a schematic diagram of an assembly of a gear lever provided by an embodiment of the present invention, such as Figure 4As shown, in another implementation of the present invention, a radially arranged limiting hole 332 is provided on the positioning ring 33, and the shift rod 331 can be slidably inserted in the limiting hole 332, and one end of the shift rod 331 is transmission-connected to the driving member so as to extend out of the positioning ring 33 through the limiting hole 332.

[0056] In the above embodiment, the shift rod 331 can be driven to slide by the driving member, so that one end of the shift rod 331 extends out from the limiting hole 332 (the other end of the shift rod 331 is inserted into the limiting hole 332), so that the shift rod 331 is against the bottom surface of the limiting plate 32, and finally the positioning ring 33, the safety rope 31 and the slider 23 are limited.

[0057] Exemplarily, the driving member may be a cylinder or an electric push rod.

[0058] Furthermore, there are multiple shift rods 331 , which are arranged at intervals along the circumference of the positioning ring 33 , so that the positioning ring 33 is limited by the multiple shift rods 331 , thereby ensuring the reliability of the limitation.

[0059] Exemplarily, the number of the gear rods 331 may be 2-4, etc., and the multiple gear rods 331 are evenly spaced. Preferably, the number of the gear rods 331 is 4, and the interval between two adjacent gear rods 331 is 90°.

[0060] Figure 5 is a partial enlarged view of the lifting assembly provided by the embodiment of the present invention, combined with Figure 1 and Figure 5 As shown, the lifting assembly 2 also includes a screw seat 24, which is transmission-connected to the slider 23, and the screw seat 24 and the screw 22 are threadedly matched.

[0061] In the above embodiment, the screw seat 24 plays a role in transmitting and connecting the screw 22 and the slider 23 .

[0062] Exemplarily, the slider 23 has connecting plates 28 at both upper and lower ends, and the platform door 100 is fixedly mounted on the slider 23 via the upper and lower connecting plates 28 , thereby increasing the installation stability of the platform door 100 .

[0063] Furthermore, the screw seat 24 has a tenon 25 , the slider 23 has a mortise 26 , and the tenon 25 and the mortise 26 are matched with each other.

[0064] In the above embodiment, the connection reliability between the screw seat 24 and the slider 23 can be increased by the cooperation between the tenon 25 and the mortise 26 .

[0065] In this embodiment, the column body 1 has a baffle 27 , which is arranged vertically. The baffle 27 has a vertically arranged slide rail 271 , and the slider 23 is slidably arranged on the slide rail 271 .

[0066] In the above embodiment, the baffle 27 supports and positions the slide rail 271 , while the slide rail 271 slides and guides the slider 23 , thereby ensuring the reliability of the lifting and lowering of the slider 23 and the platform door 100 .

[0067] Exemplarily, the baffle 27 is arranged perpendicular to the column body 1 .

[0068] It should be noted that the column body 1 is a shell with a cavity, and the lifting assembly 2, the safety rope assembly 3 and the counterweight assembly 4 are located in the cavity to play a protective role.

[0069] It is easy to understand that each platform door 100 can be raised and lowered by means of two column structures, that is, the two column structures are symmetrically arranged on both sides of the platform door 100 , thereby ensuring the stability of the lifting and lowering of the platform door 100 .

[0070] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A column structure for a lifting platform door, characterized in that: The column structure comprises a column body (1), a lifting assembly (2) and a safety rope assembly (3); The lifting assembly (2) comprises a motor (21), a screw rod (22) and a slider (23) for installing the platform door (100), wherein the motor (21) is located on the column body (1), the output end of the motor (21) is coaxial with and transmission-connected to one end of the screw rod (22), the other end of the screw rod (22) is threadedly matched with the slider (23), the slider (23) is slidably arranged on the column body (1), and the sliding direction of the slider (23) extends in the vertical direction; The safety rope assembly (3) comprises a safety rope (31), a limiting plate (32) and a positioning ring (33); one end of the safety rope (31) is connected to the slider (23); the limiting plate (32) is fixedly mounted on the column body (1); the limiting plate (32) has a through hole (321); the safety rope (31) movably passes through the through hole (321); the positioning ring (33) is fixedly sleeved on the other end of the safety rope (31); the positioning ring (33) and the slider (23) are located on both sides of the limiting plate (32); the positioning ring (33) has at least one gear lever (331), a speed sensor (331) and a speed sensor (332). , a driving member and a controller, the gear rod (331) is movably arranged on the positioning ring (33), and the driving member is transmission-connected to the gear rod (331), the speed sensor, the controller and the driving member are electrically connected in sequence, and the gear rod (331) is configured such that when the displacement speed of the positioning ring (33) exceeds a threshold value, the gear rod (331) radially extends from the positioning ring (33) to limit the gear rod (331) from passing through the through hole (321), and when the displacement speed of the positioning ring (33) does not exceed the threshold value, the gear rod (331) and the positioning ring (33) pass through the through hole (321).

2. A column structure for a lifting platform door according to claim 1, characterized in that: The column structure also includes a counterweight assembly (4), which includes a counterweight block (41), a gear (42) and a chain (43). The counterweight block (41) is arranged on the column body (1) in a manner that it can be raised or lowered, and the gear (42) is rotatably arranged on the top of the column body (1). The chain (43) is meshed with the gear (42), and both ends of the chain (43) extend downward and are respectively connected to the slider (23) and the counterweight block (41).

3. A column structure for a lifting platform door according to claim 2, characterized in that: The counterweight assembly (4) further comprises a synchronous wheel (44) and a belt (45), wherein the synchronous wheel (44) is rotatably arranged at the bottom of the column body (1), and the belt (45) is slidably engaged with the synchronous wheel (44), and both ends of the belt (45) extend upward and are respectively connected to the counterweight block (41) and the slider (23).

4. The column structure for a lifting platform door according to claim 1, characterized in that: The safety rope assembly (3) further comprises a fixed pulley (34), which is rotatably arranged on the top of the column body (1), the safety rope (31) is slidably engaged with the fixed pulley (34), and both ends of the safety rope (31) extend downward.

5. The column structure for a lifting platform door according to claim 4, characterized in that: The positioning ring (33) is provided with a limiting hole (332) arranged in a radial direction, the shift rod (331) can be slidably inserted in the limiting hole (332), and one end of the shift rod (331) is transmission-connected to the driving member so as to extend out of the positioning ring (33) through the limiting hole (332).

6. The column structure for a lifting platform door according to claim 4, characterized in that: One end of the shift rod (331) is hinged on the outer wall of the positioning ring (33), and the other end of the shift rod (331) is hinged to the driving member to unfold the shift rod (331).

7. A column structure for a lifting platform door according to claim 5 or 6, characterized in that: There are a plurality of the shifting rods (331), and the plurality of the shifting rods (331) are arranged at intervals along the circumference of the positioning ring (33).

8. A column structure for a lifting platform door according to any one of claims 1 to 4, characterized in that: The lifting assembly (2) further comprises a screw seat (24), the screw seat (24) being transmission-connected to the slider (23), and the screw seat (24) and the screw (22) being threadably matched.

9. The column structure for a lifting platform door according to claim 8, characterized in that: The screw rod seat (24) is provided with a tenon (25), the slider (23) is provided with a mortise (26), and the tenon (25) and the mortise (26) are matched with each other.

10. A column structure for a lifting platform door according to any one of claims 1 to 4, characterized in that: The column body (1) is provided with a baffle (27), the baffle (27) is arranged vertically, the baffle (27) is provided with a vertically arranged slide rail (271), and the slide block (23) is slidably arranged on the slide rail (271).

Images