Platform door-based moving box guidance drive system

Abstract

This invention discloses a mobile box guiding and driving system based on a platform screen door, comprising a full-length guiding unit, multiple mobile boxes, and multiple driving units. The multiple mobile boxes are arranged sequentially above the full-length guiding unit. The full-length guiding unit includes a platform plate assembly, a guide wheel assembly, a support wheel assembly, and a guide shoe assembly. The platform plate assembly is mounted on a lower support assembly and has at least two guide gaps along its length. The guide wheel assembly, support wheel assembly, and guide shoe assembly are respectively mounted on the front and rear sides of the mobile box's bottom plate, passing through their respective guide gaps and engaging with the platform plate assembly. Each mobile box is equipped with at least one driving unit, which is mounted on the mobile box's bottom plate and performs transmission motion below the platform plate assembly, passing through the guide gaps. This invention makes the mobile box operation more stable and reliable, significantly improves the safety factor, and greatly reduces on-site construction difficulty.

Description

Technical Field

[0001] This invention relates to the field of urban rail transit and high-speed railway platform screen door technology, and in particular to a moving box guide drive system based on platform screen doors. Background Technology

[0002] A platform screen door system refers to a continuous barrier installed on the platform and / or the edge of the platform to isolate the passenger waiting area from the track area, and which corresponds to the train doors and can be controlled to open and close sliding doors in multiple stages.

[0003] For urban rail transit such as subways and light rail, the train models for a given line are fixed and singular. The relative positions and door sizes of each train are identical, so the platform screen doors and safety doors used in subway stations can be arranged according to the specific train model, ensuring a one-to-one correspondence between sliding doors and train doors. However, due to historical reasons, my country's high-speed rail and intercity trains have multiple train models. Railway platforms face the need to accommodate trains of various models, and the accuracy of their stopping positions is lower than that of subways and light rail. Therefore, the requirements for the adaptability of railway platform safety doors to different train models are higher than those for existing subway safety doors.

[0004] To meet the aforementioned market demands, a fully movable platform screen door system has been introduced to the market, enabling doors to open at any position and with extra-large opening sizes. Existing fixed platform screen door transmission systems primarily use belt drives and screw drives. While these systems meet requirements for smooth and reliable transmission, simple structure, ease of installation and maintenance, and long service life, they suffer from limitations such as short transmission distances, large structural dimensions, and independent operation of each unit transmission system. Therefore, they cannot be applied to the new fully movable platform screen door system.

[0005] The requirements for the transmission system of the new fully movable platform screen door are more complex than those of the previous platform screen door. It must be structurally stable and reliable with high safety, and also meet the functional requirement of unlimited transmission distance. At the same time, since all the doors of the fully movable platform screen door can move, new requirements are put forward for the installation position and space of the transmission system. Therefore, the new transmission system should also meet the requirement of small and compact shape.

[0006] In addition to the high requirements for the transmission mechanism, fully movable platform screen doors also place extremely stringent demands on the guiding system. Traditional sliding platform screen doors have independent guide rails or devices of a fixed length, and there is no interference between the opening and closing areas. However, for fully movable platform screen doors, the door opening position and the size of the door opening change with the vehicle type. The opening direction and movement distance of each moving door unit need to be coordinated with each other. Therefore, it is impossible to provide each moving door unit with an independent guide rail or device of a fixed length.

[0007] Therefore, there is an urgent need to develop a new type of mobile box guidance drive system based on platform screen doors to fundamentally solve the above technical problems. Summary of the Invention

[0008] To address the problems existing in the prior art, this invention provides a mobile box guiding and driving system based on platform screen doors. The driving part of this guiding and driving system has a small external size, stable and reliable transmission, high safety, unlimited movement distance, and can be connected and extended indefinitely. The guiding part has the function of guiding the entire length of a single shared platform screen door that is movable throughout the entire length and meets the wind pressure requirements of rail transit. The entire guiding and driving system adopts a combination of guiding and driving to ensure that the mobile box operates more smoothly and reliably.

[0009] The present invention is implemented as follows: a moving box guiding and driving system based on a platform door includes a full-length guiding unit, multiple moving boxes and multiple driving units. The full-length guiding unit is laid along the edge of the platform, and the multiple moving boxes are located above the full-length guiding unit and arranged sequentially along the length of the full-length guiding unit.

[0010] The full-length guide unit includes a platform plate assembly, a guide wheel assembly, a support wheel assembly, and a guide shoe assembly. The platform plate assembly is mounted on a support assembly located below it. The platform plate assembly has at least two guide gaps along its length. The guide wheel assembly, support wheel assembly, and guide shoe assembly are respectively mounted on the front and rear sides of the bottom plate of the movable box, with the guide wheel assembly and support wheel assembly located on different sides. The guide wheel assembly, support wheel assembly, and guide shoe assembly pass through the corresponding guide gaps and cooperate with the platform plate assembly to move the movable box along the platform plate assembly.

[0011] Each of the mobile boxes is equipped with at least one drive unit, which is mounted on the base plate of the mobile box and passes through the guide gap to perform transmission movement under the platform plate assembly, for driving the mobile box to move along the full length of the guide unit.

[0012] Preferably, the guide wheel assembly passes through a guide gap near the railway track side, and the guide component of the guide wheel assembly clamps the platform plate assembly and leaves a rolling gap, so that the guide wheel assembly moves on the platform plate assembly. The guide wheel assembly and the platform plate assembly together form a first guide wheel guide rail pair.

[0013] The support wheel assembly passes through the guide gap near the edge of the platform, and the support component of the support wheel assembly clamps the platform plate assembly and leaves a rolling gap, so that the support wheel assembly can move on the platform plate assembly. The support wheel assembly and the platform plate assembly together form the second guide wheel guide rail pair.

[0014] The guide shoe assembly extends into one or more guide gaps to form a guide shoe guiding mechanism.

[0015] Preferably, the platform plate assembly has an arc-shaped groove corresponding to the guide wheel assembly, and an optical axis guide rail is fitted into the groove with a clearance fit.

[0016] More preferably, the platform panel assembly consists of multiple platform panels with their ends sequentially connected; one end of the optical axis guide rail installed in the groove extends out of the end face of the platform panel to form a male connector, and the other end is recessed into the groove to form a female connector, and the female connector and the male connector are spliced ​​together so that the optical axis guide rail is on the same straight line.

[0017] More preferably, the guide wheel assembly includes a guide wheel bracket and a guide component mounted on the guide wheel bracket. The guide wheel bracket is mounted on the platform door base plate, and the guide component includes a guide wheel one and a guide wheel two. The guide wheel one is a concave guide wheel, rotatably mounted on the upper part of the guide wheel bracket on the side corresponding to the optical axis guide rail, and cooperating with the optical axis guide rail. The guide wheel two is rotatably mounted on the lower part of the guide wheel bracket on the same side as the guide wheel one, and the wheel surface of the guide wheel two abuts against the platform plate assembly.

[0018] The support wheel assembly includes a support wheel bracket and a support component. The support wheel bracket is mounted on the platform door base plate, and the support component includes a support wheel one and a support wheel two. The support wheel one is rotatably mounted on the upper part of the support wheel bracket about its own axis, and the wheel surface of the support wheel one abuts against the platform plate assembly. On the same side as the support wheel one, the support wheel two is rotatably mounted on the lower part of the support wheel bracket about its own axis, and the wheel surface of the support wheel two abuts against the platform plate assembly.

[0019] The guide shoe assembly includes a guide shoe bracket and a guide shoe sleeve, with the guide shoe sleeve nested on the guide shoe bracket.

[0020] More preferably, the guide shoe bracket has elongated protrusions on both sides along its length, and correspondingly, recesses that mate with the protrusions are provided on both sides inside the guide shoe sleeve.

[0021] Preferably, the drive unit consists of a drive motor, a gear assembly, and a rack assembly. The gear assembly includes a gear seat and a gear. The drive motor is located inside the movable box and mounted on the gear seat. The gear seat is mounted on the bottom plate of the movable box and passes through a guide gap. The gear is rotatably and horizontally arranged on the gear seat located below the platform plate assembly. The output shaft of the drive motor extends into the gear assembly and connects with the gear. The gear meshes with the rack of the rack assembly, and the output shaft of the drive motor drives the gear to move along the rack.

[0022] The rack assembly includes a rack seat and a rack. The rack seat is mounted on a support assembly below the platform plate assembly, and the rack is mounted on the rack seat. The rack is aligned and connected along its entire length by the retaining edge of the rack seat.

[0023] More preferably, the upper part of the gear seat is a circular double-layer flange structure with a central through hole. The upper flange is used to install the drive motor, and the output shaft of the drive motor passes through the through hole and connects to the gear. The lower flange is used to install the gear seat on the bottom plate of the movable box.

[0024] The lower part of the gear seat is a plate-type loop structure, which fits with and passes through the guide gap, and the gear is arranged on the lower inner side of the plate-type loop structure;

[0025] The lower part of the gear seat is arranged perpendicularly to the upper part of the gear seat and is rigidly connected, and the upper part of the gear seat covers the lower part of the gear seat.

[0026] More preferably, the diameter of the upper flange is smaller than the diameter of the lower flange.

[0027] More preferably, the bottom of the plate-type loop structure is provided with a mounting hole, a bearing is installed in the mounting hole, a bushing is provided between the bearing and the gear, one end of the bushing abuts against the inner ring of the bearing, and the other end abuts against the gear, and the output shaft of the drive motor is connected to the gear through a flat key, and passes through the gear, the bushing in sequence, and is connected to the bearing.

[0028] The advantages and positive effects of this invention are:

[0029] 1. The mobile box guiding drive system of the present invention makes the mobile box operation more stable and reliable, greatly improves the safety factor, and significantly reduces the difficulty of on-site construction; it enables each mobile box to move and open at any position on the edge of the platform according to the specific train model, flexibly adjusts the opening position, and has an ultra-large platform door opening; it can form different opening combination schemes according to specific needs, is applicable to various train models and sizes, has strong practicality, and is conducive to realizing a safe and reliable platform door opening and closing process that is compatible with different trains.

[0030] 2. The full-length guide unit of this invention adopts a double-row guide wheel and guide rail structure plus a guide shoe structure to connect and cooperate with the platform door. The guide wheels and support wheels pass through the guide gap and clamp the platform plate from top to bottom, rolling with the platform plate. This allows the guide wheels, support wheels, and guide shoe assemblies to run smoothly along the platform plate, reducing the driving force of the moving box and thus making the moving box run smoothly. At the same time, it can better meet the requirements of the platform door to resist radial wind pressure, improve the resistance to torsional moment and overturning moment, and make the platform door operation more stable and reliable. Meanwhile, the use of a light-axis guide rail instead of the traditional linear guide rail of the platform door as the guide structure solves the guidance problem of the new full-motion platform door. The light-axis guide rail is fully connected through male and female joint features, solving the problem of difficult full-length layout and connection, meeting the requirement of full-length mobility of the platform door, reducing the guide rail precision and greatly reducing the on-site construction difficulty. This full-length guide unit has a small installation volume, high space utilization, significantly reduced installation precision requirements, low environmental requirements, and low maintenance requirements. It can both provide guidance and withstand radial pressure.

[0031] 3. The drive unit of this invention adopts a gear and rack transmission structure, integrating the drive of all moving boxes into a single drive system. This system, arranged along the entire length, offers advantages such as simple structure, small size, stability, reliability, high safety, unrestricted movement distance, and unlimited docking capability. Furthermore, in conjunction with the full-length guide unit, the under-mounted structure, with transmission occurring below the platform assembly, isolates the gears and racks, ensuring a high safety factor and meeting the safety requirements for passengers boarding and alighting. It also extends the lifespan of the gears and racks, preventing wear and damage caused by exposed gears and racks, thus avoiding interference with the drive unit. This also ensures smoother operation of the moving boxes in conjunction with the platform assembly.

[0032] 4. The upper part of the gear seat of this invention adopts a circular double-layer flange structure with a central through hole, which facilitates the installation and disassembly of the main motor and gear seat, and prevents particulate matter from falling into the gear and affecting its working performance. The lower part adopts a plate-type loop structure, which improves rigidity through rigid connection and can effectively connect the gear with the drive motor and rack. At the same time, it can limit the upper and lower positions of the gear, which can not only adapt to the small width of the guide gap of the platform plate, but also play a guiding role. It also reduces the lateral load of the output shaft of the drive motor, so that the gear and rack can always maintain a good meshing state. The unique gear seat design makes the structure of the entire drive system more compact, with a longer service life and better operational stability, while meeting the safety requirements of passengers crossing the platform.

[0033] 5. The gear and rack transmission of the present invention adopts a horizontal transmission method, which greatly reduces vibration, makes the transmission force greater, the meshing motion of the gear and rack more stable, and the transmission efficiency higher, making the movement and braking of the moving box easier. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some specific embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is an exploded structural diagram of the mobile box guiding drive system provided in an embodiment of the present invention;

[0036] Figure 2 This is a perspective view of the full-length guide unit provided in an embodiment of the present invention;

[0037] Figure 3 This is a side view of the full-length guide unit provided in an embodiment of the present invention;

[0038] Figure 4 This is a perspective view of the guide wheel assembly provided in an embodiment of the present invention;

[0039] Figure 5 This is an exploded structural diagram of the guide wheel assembly provided in an embodiment of the present invention;

[0040] Figure 6 This is a schematic diagram of the optical axis guide rail docking structure provided in an embodiment of the present invention;

[0041] Figure 7 This is a perspective view of the support wheel assembly provided in an embodiment of the present invention;

[0042] Figure 8 This is an exploded structural diagram of the support wheel assembly provided in an embodiment of the present invention;

[0043] Figure 9 This is a perspective view of the driving unit provided in an embodiment of the present invention;

[0044] Figure 10 This is a side view of the driving unit provided in an embodiment of the present invention;

[0045] Figure 11 This is an exploded structural diagram of the gear assembly and drive motor provided in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Moving box; 101. Moving box base plate; 102. Hole;

[0048] 2. Full-length guide unit;

[0049] 20. Platform panel assembly; 201. Guide rail base; 2011. Groove; 202. Threshold step plate one; 203. Threshold step plate two; 204. Guide gap one; 205. Guide gap two; 206. Optical axis guide rail; 2061. Male connector; 2062. Female connector;

[0050] 21. Guide wheel assembly; 211. Guide wheel one; 212. Guide wheel two; 213. Guide wheel bracket;

[0051] 22. Support wheel assembly; 221. Support wheel one; 222. Support wheel two; 223. Support wheel bracket;

[0052] 23. Guide shoe assembly; 231. Guide shoe bracket; 232. Guide shoe sleeve; 2311. Protrusion; 2321. Notch;

[0053] 24. Support assembly; 25. Bearing 1; 26. Elastic retaining ring; 27. Bushing 1; 28. Axle; 29. ​​Fixing bolt;

[0054] 3. Drive unit;

[0055] 30. Gear assembly; 301. Gear seat; 3011. Mounting hole; 3012. Through hole; 302. Gear; 303. Flat key; 304. Bushing II; 305. Bearing II;

[0056] 31. Rack assembly; 311. Rack; 312. Rack seat;

[0057] 32. Drive motor; 321. Output shaft of drive motor. Detailed Implementation

[0058] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0061] Please see Figures 1-11 This embodiment provides a mobile box guiding drive system based on a platform door, including a full-length guide unit 2, multiple mobile boxes 1 and multiple drive units 3. The full-length guide unit 2 is laid along the edge of the platform, and the multiple mobile boxes 1 are located above the full-length guide unit 2 and arranged sequentially along the length of the full-length guide unit 2.

[0062] The full-length guide unit 2 includes a platform plate assembly 20, a guide wheel assembly 21, a support wheel assembly 22, and a guide shoe assembly 23. The platform plate assembly 20 is mounted on a support assembly 24 located below it, and the platform plate assembly 20 has at least two guide gaps along its length. The guide wheel assembly 21, the support wheel assembly 22, and the guide shoe assembly 23 are respectively mounted on the front and rear sides of the mobile box bottom plate 101, with the guide wheel assembly 21 and the support wheel assembly 22 located on different sides. The guide wheel assembly 21, the support wheel assembly 22, and the guide shoe assembly 23 pass through the corresponding guide gaps and cooperate with the platform plate assembly 20 to move the mobile box 1 along the platform plate assembly 20, enabling the door to open at any position and to adjust the door opening degree. Through the cooperation of the guide wheel assembly 21, the support wheel assembly 22, and the guide shoe assembly 23 with the platform plate assembly 20, the mobile box 1 moves smoothly.

[0063] Each of the mobile boxes 1 is equipped with at least one drive unit 3, which is mounted on the base plate 101 of the mobile box and passes through the guide gap to perform transmission movement below the platform plate assembly 20, so as to drive the mobile box 1 to move along the full length of the guide unit 2.

[0064] The guide wheel assembly 21 passes through the guide gap near the railway track side, and the guide component of the guide wheel assembly 21 clamps the platform plate assembly 20 with a rolling clearance, allowing the guide wheel assembly 21 to move on the platform plate assembly 20. The guide wheel assembly 21 and the platform plate assembly 20 together form a first guide wheel guide rail pair. The support wheel assembly 22 passes through the guide gap near the edge of the platform, and the support component of the support wheel assembly 22 clamps the platform plate assembly 20 with a rolling clearance, allowing the support wheel assembly 22 to move on the platform plate assembly 20. The support wheel assembly 22 and the platform plate assembly 20 together form a second guide wheel guide rail pair. The guide shoe assembly 23 extends into any one or more guide gaps, forming a guide shoe guiding mechanism. The double-row guide wheel and guide rail structure, along with the guide shoe structure, are connected and cooperate with the moving box 1. The guide wheel assembly 21 and the support wheel assembly 22 pass through the guide gap and clamp the platform plate from top to bottom, rolling with the platform plate. This further ensures the smooth operation of the moving box 1 and also better meets the requirements of the platform door to resist radial wind pressure. It also improves the anti-torsional moment and anti-overturning moment, making the platform door operation more stable and reliable.

[0065] The platform panel assembly 20 consists of multiple platform panels whose ends are sequentially connected and laid along the edge of the platform, so that each movable box 1 can move along the entire connected platform panel assembly 20 at the edge of the platform.

[0066] In this embodiment, two guide gaps are provided, so that the platform panel assembly 20 consists of a guide rail seat 201, a first threshold step plate 202, and a second threshold step plate 203. The guide rail seat 201, the first threshold step plate 202, and the second threshold step plate 203 are all mounted on the support assembly 24 located below them. The support assembly 24 is fixed relative to the platform. A guide gap 204 is provided between the guide rail seat 201 and the first threshold step plate 202, and a guide gap 205 is provided between the first threshold step plate 202 and the second threshold step plate 203. The guide rail seat 201, the first threshold step plate 202, and the second threshold step plate 203 are all made of aluminum profiles.

[0067] The guide wheel assembly 21 includes a guide wheel bracket 213 and a guide component mounted on the guide wheel bracket. The guide wheel bracket 213 is mounted on the bottom plate 101 of the movable box. The guide component includes a first guide wheel 211 and a second guide wheel 222. The first guide wheel 211 is rotatably mounted on the upper part of the guide wheel bracket 213 via a first bearing 25, a first bushing 27, an elastic retaining ring 26, and a wheel axle 28 around its own axis. The second guide wheel 222 is rotatably mounted on the lower part of the guide wheel bracket 213 via a first bearing 25, a first bushing 27, an elastic retaining ring 26, and a wheel axle 28 around its own axis. The first guide wheel 211 and the second guide wheel 222 are located on the same side of the guide wheel bracket 213. Specifically, one end of the axle 28 is fixedly connected to the guide wheel bracket 213, and the other end of the axle 28 is connected to the elastic retaining ring 26. The bushing 27 is fitted onto the axle 28, with one end abutting against the guide wheel bracket 213. The inner ring of the bearing 25 is fitted onto the axle 28 and abuts against the space between the other end of the bushing 27 and the elastic retaining ring 26. The guide wheel 211 is fixedly fitted onto the outer ring of the bearing 25. The specific installation method of the guide wheel 222 is the same as that of the guide wheel 211.

[0068] The guide rail base 201 has an arc-shaped groove 2011 corresponding to the guide wheel assembly 21. The optical axis guide rail 206 is fitted into the groove 2011 with a clearance fit. The guide wheel 211 is a concave guide wheel that cooperates with the optical axis guide rail 206. The concave surface of the guide wheel 211 and the arc surface of the optical axis guide rail 206 are nested and cooperate with each other, which plays a supporting and guiding role, making the movement of the movable box 1 more convenient and facilitating the adjustment of the position of the movable box 1. Furthermore, when the optical axis guide rail 206 is embedded in the groove 2011, one end of the optical axis guide rail 206 extends out of the end face of the platform plate to form a male connector 2061, and the other end is recessed into the groove to form a female connector 2062. At the joint of the platform plate, the female connector 2062 and the male connector 2061 are spliced ​​to make the optical axis guide rail 206 lie on the same straight line. The guide rail composed of the optical axis guide rail 206 and the aluminum profile guide rail seat 201 is extended and positioned by the male and female connectors, and arranged along the entire length of the platform edge to meet the requirement that the platform door can move along its entire length. At the same time, it greatly reduces the difficulty of construction, is stable and reliable, and has low requirements for construction precision.

[0069] The upper part of the guide wheel bracket 213 is mounted on the base plate 101 of the movable box by fixing bolts 29. The lower part of the guide wheel bracket 213 passes through the guide gap 204. The first guide wheel 211 cooperates with the optical axis guide rail 206, and the wheel surface of the second guide wheel 222 abuts against the lower end face of the guide rail seat 201. The first guide wheel 211 and the second guide wheel 222 clamp the guide rail seat 201 with a rolling gap, so that the guide wheel assembly 21 can move along the optical axis guide rail 206 on the guide rail seat 201. The guide wheel assembly 21 and the guide rail seat 201 together form the first guide wheel guide rail pair. The guide wheel assembly 21 passes through the guide gap and clamps the guide rail seat 201, so that the movable box 1 moves back and forth along the optical axis guide rail 206 under the guidance of the guide wheel assembly 21, which reduces the driving force of the movable box 1, and at the same time plays a supporting and guiding role, and bears part of the radial force.

[0070] The support wheel assembly 22 includes a support wheel bracket 223 and a support component. The support wheel bracket 223 is mounted on the bottom plate 101 of the movable box. The support component includes a first support wheel 221 and a second support wheel 222. The first support wheel 221 is rotatably mounted on the upper part of the support wheel bracket 223 via a first bearing 25, a first bushing 27, an elastic retaining ring 26, and a wheel axle 28. The second support wheel 222 is rotatably mounted on the lower part of the support wheel bracket 223 via a first bearing 25, a first bushing 27, an elastic retaining ring 26, and a wheel axle 28. The first support wheel 221 and the second support wheel 222 are located on the same side of the support wheel bracket 223. The specific installation method of the first support wheel 221 and the second support wheel 222 is the same as that of the guide wheel 211.

[0071] The support wheel assembly 22 is mounted on the base plate 101 of the movable box via the support wheel bracket 223 and fixing bolts 29, and passes through the second guide gap 205. The wheel surface of the first support wheel 221 abuts against the upper end surface of the second sill plate 203, and the wheel surface of the second support wheel 222 abuts against the lower end surface of the second sill plate 203. The first support wheel 221 and the second support wheel 222 clamp the second sill plate 203 with a rolling gap, allowing the support wheel assembly 22 to move on the second sill plate 203. The support wheel assembly 22 and the second sill plate 203 together form the second guide wheel guide rail pair. The support wheel assembly 22 clamps the second sill plate 203 through the guide gap, allowing the movable box 1 to move along the guide gap on the second sill plate 203 under the guidance of the support wheel assembly 22. This reduces the driving force of the movable box 1, while also providing support and guidance, and bearing part of the radial force.

[0072] The guide shoe assembly 23 includes a guide shoe bracket 231 and a guide shoe sleeve 232. The guide shoe bracket 231 is mounted on the bottom plate 101 of the movable box, and the guide shoe sleeve 232 is nested on the guide shoe bracket 231. Specifically, the guide shoe bracket 231 has elongated protrusions 2311 on both sides along its length, and correspondingly, the guide shoe sleeve 232 has recesses 2321 on both sides inside to mate with the protrusions 2311. The guide shoe bracket 231 is mounted on the bottom plate 101 of the movable box by fixing bolts 29. The guide shoe assembly 23 extends into both the first guide gap 204 and the second guide gap 205, forming a guide shoe guiding mechanism. The guide shoe assembly 23 extends into the guide gap and slides in the corresponding guide gap as the movable box 1 moves, thus playing a role in auxiliary guidance and bearing part of the radial force.

[0073] The base plate 101 of the mobile box is provided with holes 102 for each guide wheel assembly 21, support wheel assembly 22 and guide shoe assembly 23 to pass through, so as to facilitate the installation of each guide wheel assembly 21, support wheel assembly 22 and guide shoe assembly 23.

[0074] The drive unit 3 and the guide wheel assembly 21 pass through different guide gaps, further improving the smoothness of operation. The drive unit 3 consists of a drive motor 32, a gear assembly 30, and a rack assembly 31. The gear assembly 30 includes a gear seat 301 and a gear 302. The drive motor 32 is located inside the moving box 1 and mounted on the gear seat 301. The gear seat 301 is mounted on the bottom plate 101 of the moving box and passes through the guide gap 205. The gear 302 is rotatably and horizontally mounted on the gear seat 301 below the platform plate assembly 20. The output shaft 321 of the drive motor extends into the gear assembly 30 and connects with the gear 302. The gear 302 meshes with the rack 311 of the rack assembly 31, and the output shaft 321 of the drive motor drives the gear 302 to move along the rack 311. By adopting a gear and rack transmission mechanism, the drive of all moving boxes 1 is integrated into a single drive system. This system is arranged along the entire length of the moving box and has advantages such as simple structure, small size, stability and reliability, high safety, unlimited movement distance, and unlimited docking and extension. The system employs a bottom-mounted structure with transmission occurring beneath the platform assembly 20. This isolates the gear and rack from the external environment, effectively preventing damage from contaminants and human error. This design ensures a high safety factor and meets passenger safety requirements for boarding and alighting. It also extends the lifespan of the gear and rack, preventing wear and damage caused by exposed gears and racks, thus avoiding interference with the drive unit 3 and improving transmission reliability and safety. Furthermore, it re-engages the moving box 1 with the platform assembly 20, ensuring smoother operation. The horizontal gear and rack transmission significantly reduces vibration, resulting in greater transmission power, smoother gear and rack meshing, and higher transmission efficiency, making the movement and braking of the moving box 1 easier.

[0075] The rack assembly 31 includes a rack seat 312 and a rack 311. The rack seat 312 is an aluminum profile rack seat, which is installed on the support assembly 24 below the platform plate assembly 20 and serves as the structural foundation of the transmission system. The rack 311 is installed on the rack seat 312 and is located below the platform plate assembly 20. The rack 311 is aligned and connected with the retaining edge of the rack seat 312 to achieve full-length connection.

[0076] The upper part of the gear seat 301 is mounted on the base plate 101 of the movable box, and the lower part of the gear seat 301 passes through the guide gap 205. The gear 302 is horizontally arranged inside the lower part of the gear seat 301. Specifically, the upper part of the gear seat 301 is a circular double-layer flange structure with a central through hole, which facilitates the connection and fixation of the gear seat 301 to the drive motor 32 and the base plate 101 of the movable box. The upper flange is used to install the drive motor 32, and the output shaft 321 of the drive motor passes through the through hole 3012 and connects to the gear 302. The lower flange is used to mount the gear seat 301 on the base plate 101 of the movable box. The diameter of the upper flange is smaller than the diameter of the lower flange, which facilitates the installation and disassembly of the drive motor 32 and the gear seat 301.

[0077] The lower part of the gear seat 301 is a plate-type U-shaped structure. The lower part of the gear seat 301 is arranged vertically and rigidly connected to the upper part of the gear seat 301, which improves rigidity. The upper part of the gear seat 301 covers the lower part of the gear seat 301, which prevents particulate debris from the platform plate from falling into the interior of the gear 302 and affecting the working performance of the gear 302. The plate-type loop structure is used to cooperate with the guide gap 205 and extend through the guide gap 205 to the bottom of the platform plate assembly 20. The gear 302 is horizontally arranged on the lower inner side of the plate-type loop structure, which can effectively connect the gear 302 with the drive motor 32 and the rack 311. At the same time, it can limit the upper and lower positions of the gear 302, which is safe, stable and reliable. It can adapt to the small width of the guide gap of the platform plate and move, and also play a guiding role. At the same time, it reduces the lateral load of the output shaft 321 of the drive motor, so that the gear and rack can always maintain a good meshing state. The design of the entire gear seat 301 makes the structure of the entire drive unit 3 more compact, with a longer service life and better operational stability, while meeting the safety requirements of passengers crossing the platform plate.

[0078] The bottom of the plate-type U-shaped structure is provided with a mounting hole 3011. A bearing 305 is installed in the mounting hole 3011. A bushing 304 is provided between the bearing 305 and the gear 302. One end of the bushing 304 abuts against the inner ring of the bearing 305, and the other end abuts against the gear 302. The output shaft 321 of the drive motor is connected to the gear 302 through a key 303, and passes through the gear 302, the bushing 304, and is connected to the bearing 305. The central axes of the gear seat 301, the gear 302, the mounting hole 3011, and the output shaft 321 of the drive motor are coaxial. The bushing 304 is placed between the gear 302 and the bearing 305 and is sleeved on the output shaft 321 of the drive motor, serving as a barrier and limiting element. The end of the output shaft 321 of the drive motor is connected to the inner ring of the bearing 305. Gear 302 meshes with rack 311. Drive motor 32 controls the output shaft 321 of drive motor to rotate, thereby driving gear 302 to move on rack 311. In this embodiment, drive motor 32 is a geared motor.

[0079] Furthermore, in this embodiment, the guide gap 1 204 and guide gap 2 205 are designed with a width of no more than 15 mm based on engineering and relevant track platform door technical requirements, in order to meet the requirements for safe boarding and alighting of waiting passengers.

[0080] In this embodiment, both the guide wheel of the guide wheel assembly 21 and the support wheel of the support wheel assembly 22 are made of hard, wear-resistant non-metallic materials, which greatly reduces the wear and maintenance of the guide rail and improves the reliability and stability of the platform screen door product.

[0081] Driven by its drive unit 3, the movable box 1 of this invention, in cooperation with the first guide wheel guide pair composed of guide wheel assembly 21 and guide rail seat 201, the second guide wheel guide pair composed of support wheel assembly 22 and threshold step plate 203, and the guide shoe guiding mechanism composed of guide shoe assembly 23 and guide gap 1 204 and guide gap 2 205, drives the drive motor 32 to control the gear 302 to move along the rack 311, causing the movable box 1 to slide under the guidance of the guide wheel assembly 21, support wheel assembly 22, guide shoe assembly 23 and gear assembly 30, forming a full-length guiding drive on the platform plate assembly 20, enabling the movable box 1 to move in a full-length directional manner within the full-length guiding drive system. This greatly improves the radial wind pressure bearing capacity, anti-overturning moment, and anti-torsional moment, further enhancing the operational stability of the platform door.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A platform door based mobile cassette guide drive system, characterized by, The application relates to a platform system, which comprises a full-length guide unit, a plurality of moving boxes and a plurality of driving units. The full-length guide unit comprises a platform plate assembly, a guide wheel assembly, a supporting wheel assembly and a guide shoe assembly. Each moving box is provided with at least one driving unit. The guide wheel assembly passes through the guide gap near the railway track side, and the guide part of the guide wheel assembly clamps the platform plate assembly and leaves a rolling gap, so that the guide wheel assembly moves on the platform plate assembly. The supporting wheel assembly passes through the guide gap near the platform edge side, and the supporting part of the supporting wheel assembly clamps the platform plate assembly and leaves a rolling gap, so that the supporting wheel assembly moves on the platform plate assembly. The guide shoe assembly extends into one or more guide gaps to form a guide shoe guide mechanism. The platform plate assembly is provided with a circular arc-shaped groove corresponding to the guide wheel assembly. The platform plate assembly is composed of a plurality of platform plates which are sequentially butted. The driving unit is composed of a driving motor, a gear assembly and a rack assembly. The rack assembly comprises a rack seat and a rack. The rack seat is installed on the supporting assembly below the platform plate assembly. The rack is installed on the rack seat. The rack is aligned and butted through the blocking edge of the rack seat to realize full-length butt joint. The upper part of the gear seat is a circular double-layer flange structure with a through hole in the center, the upper flange is used for installing the driving motor, the output shaft of the driving motor passes through the through hole and is connected with the gear, and the lower flange is used for installing the gear seat on the moving box bottom plate; The lower part of the gear seat is a plate-shaped back structure, the plate-shaped back structure cooperates with and passes through the guide gap, and the gear is arranged at the inner lower part of the plate-shaped back structure; The lower part of the gear seat is arranged perpendicularly to the upper part of the gear seat and is rigidly connected, and the upper part of the gear seat covers the lower part of the gear seat. The diameter of the upper flange is smaller than that of the lower flange.

2. The platform door based mobile cassette guide drive system of claim 1, wherein, The guide wheel assembly comprises a guide wheel support and a guide component installed on the guide wheel support, the guide wheel support is installed on the platform door bottom plate, the guide component comprises a guide wheel one and a guide wheel two, the guide wheel one is a concave guide wheel, is rotatably installed on the upper part of the guide wheel support about its own axis on the side corresponding to the optical axis rail, and cooperates with the optical axis rail, the guide wheel two is rotatably installed on the lower part of the guide wheel support about its own axis on the same side as the guide wheel one, and the wheel surface of the guide wheel two abuts against the platform plate assembly. The support wheel assembly comprises a support wheel support and a support component, the support wheel support is installed on the platform door bottom plate, the support component comprises a support wheel one and a support wheel two, the support wheel one is rotatably installed on the upper part of the support wheel support about its own axis, and the wheel surface of the support wheel one abuts against the platform plate assembly, the support wheel two is rotatably installed on the lower part of the support wheel support about its own axis on the same side as the support wheel one, and the wheel surface of the support wheel two abuts against the platform plate assembly. The guide shoe assembly comprises a guide shoe support and a guide shoe sleeve, and the guide shoe sleeve is nested on the guide shoe support.

3. The platform door based mobile cassette guide drive system of claim 2, wherein, Correspondingly, notches matched with the protrusions are formed in the two sides of the inner part of the guide shoe sleeve.

4. The platform door based mobile cassette guide drive system of claim 1, wherein, The bottom of the plate-shaped back structure is provided with a mounting seat hole, a bearing is installed in the mounting seat hole, a bushing is arranged between the bearing and the gear, one end of the bushing abuts against the inner ring of the bearing, and the other end of the bushing abuts against the gear, the output shaft of the driving motor is connected with the gear through a flat key, and sequentially passes through the gear, the bushing, and is connected with the bearing.

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