Platform door drive system and platform door

Abstract

The application relates to the technical field of rail transit equipment, in particular to a platform door driving system, which comprises a door machine beam, a plurality of driving units for synchronously or independently controlling the movement of a first door body assembly and a second door body assembly are arranged in the door machine beam; each driving unit comprises a first group of belt assemblies for driving the first door body assembly and a second group of belt assemblies for driving the second door body assembly; wherein the first group of belt assemblies is located obliquely above the second group of belt assemblies, and the first group of belt assemblies and the second group of belt assemblies are respectively arranged in parallel relative to the door machine beam and extend along the length direction of the door machine beam, so as to solve the problem that the platform door driving system occupies a large space in the prior art.

Description

Technical Field

[0001] This application relates to the field of rail transit equipment technology, and in particular to a platform screen door drive system and a platform screen door. Background Technology

[0002] Platform screen doors are the core safety facility of subway platforms. They are usually located at the edge of the platform and achieve safe isolation when trains enter and leave the station by opening and closing the doors to prevent passengers from falling onto the tracks. Their drive system needs to precisely control the movement of the doors to match the position and opening and closing sequence of the train doors.

[0003] Existing platform screen doors mostly use belt drive systems, but their layout has obvious limitations: the traditional solution drives the double-opening door body, and the two sets of belt assemblies are distributed laterally along the gantry beam. It is necessary to reserve gaps to prevent interference, resulting in a large lateral space occupation and making it unsuitable for narrow platforms; some improved solutions attempt to stack the two sets of components vertically, but a wide vertical gap is required to avoid collisions, which increases the vertical height of the gantry beam and makes it unsuitable for low ceiling scenarios.

[0004] Therefore, how to optimize the structural layout of the platform screen door drive system and reduce the occupation of lateral and longitudinal space has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a platform screen door drive system to solve the problem of large lateral and longitudinal space occupation in existing platform screen door drive systems.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] In a first aspect, a platform screen door drive system includes:

[0008] A gantry crane beam, wherein the gantry crane beam is provided with a drive unit for synchronously or independently driving the movement of the first gate assembly and the second gate assembly;

[0009] The drive unit includes a first set of belt assemblies for driving the first door assembly to move and a second set of belt assemblies for driving the second door assembly to move.

[0010] In the width direction section of the gantry crane beam, the mounting plane of the first set of belt assemblies is higher than the mounting plane of the second set of belt assemblies and is biased towards one side of the platform; and the first set of belt assemblies and the second set of belt assemblies are arranged parallel to the gantry crane beam and extend along the length direction of the gantry crane beam.

[0011] Furthermore, the first set of belt assemblies includes a first front belt assembly and a first rear belt assembly;

[0012] The second set of belt assemblies includes a second front belt assembly and a second rear belt assembly;

[0013] The first front belt assembly and the second front belt assembly are both located near the platform, and the first rear belt assembly and the second rear belt assembly are both located near the train.

[0014] Furthermore, both the first front belt assembly and the first rear belt assembly include a first synchronous belt, a first drive mechanism, a first left tension roller, a first right tension roller, and a first guide roller;

[0015] The output shaft of the first drive mechanism is connected to a first drive wheel, and the outer periphery of the first drive wheel is meshed with the inner side of the first synchronous belt.

[0016] The first left tension roller and the first right tension roller are respectively provided on both sides of the first drive wheel. The outer periphery of the first left tension roller and the first right tension roller are meshed with the outer side of the first synchronous belt.

[0017] The first guide wheels are respectively provided on both sides away from the first drive mechanism, and the outer periphery of the two first guide wheels is engaged with the inner side of the first synchronous belt.

[0018] The first synchronous belt surrounds the first drive pulley, the first left tension roller, the first right tension roller and the first guide pulley to form a closed loop, and the first drive mechanism is used to drive the first synchronous belt to move.

[0019] Furthermore, along the length direction of the gantry beam, the first front belt assembly and the first rear belt assembly have a parallel region but are not on the same plane in the width direction.

[0020] Furthermore, the first door assembly includes a plurality of first doors;

[0021] The adjacent first door body is fixedly connected to the timing belt in the first front belt assembly via a first connector;

[0022] Another first door body is connected to the first synchronous belt in the first rear belt assembly via another first connector.

[0023] Furthermore, the second door assembly includes a plurality of second doors;

[0024] One of the adjacent second doors is fixedly connected to the timing belt in the second front belt assembly via a second connector, and the other second door is fixedly connected to the second timing belt in the second rear belt assembly via another second connector.

[0025] Furthermore, a number of first mounting components are provided on the side wall perpendicular to the gantry beam;

[0026] Each of the first mounting components is provided with an upper shaft pin for mounting the first left tension roller and the first right tension roller, and a lower shaft pin for mounting the first guide wheel is provided below the upper shaft pin.

[0027] In this context, on the same first mounting component, the height of the upper shaft pin exposed on the surface of the first mounting component is higher than the height of the lower shaft pin exposed on the surface of the first mounting component. Furthermore, along the arrangement direction of the plurality of first mounting components, the exposed height of the upper shaft pin of two adjacent first mounting components alternately increases and decreases, and the exposed height of the lower shaft pin also alternately decreases and increases accordingly.

[0028] Furthermore, the upper shaft pin of the current first mounting component is used to install the first left tension roller and the first right tension roller in the first front belt assembly, and the lower shaft pin of the current first mounting component is used to install the first guide wheel in the first rear belt assembly. The upper shaft pin of the adjacent first mounting component is used to install the tension roller of the first rear belt assembly, and its lower shaft pin is used to install the guide wheel of the first front belt assembly.

[0029] Furthermore, the maintenance surfaces of both the first and second belt conveyor assemblies face the platform.

[0030] In addition, a platform screen door is proposed, including the platform screen door drive system described above.

[0031] The technical solutions provided in this application have the following advantages compared with the prior art:

[0032] This application provides a platform gate drive system. By adopting a layered and axially non-overlapping layout for the first and second sets of belt assemblies in the width direction of the gantry crane beam, it solves the problems of excessive lateral space occupation and inability to adapt to narrow platforms caused by traditional horizontally dispersed arrangements. It also avoids the problem of needing to reserve a wide longitudinal gap due to overlapping component projections in longitudinally aligned arrangements. Specifically, by using layering to allow the two sets of components to share the same lateral space, eliminating lateral gap redundancy, and by using axial non-overlapping to avoid overlapping component projections, the longitudinal safety gap can be significantly reduced, achieving a dual compression of the lateral dimension and longitudinal height of the gantry crane beam. This significantly improves the adaptability of the drive system to the platform gantry crane beam's installation space, meets the installation requirements of narrow platforms and low ceiling scenarios, and the optimized layout avoids motion interference, which is conducive to improving the system's operational stability and reliability. Attached Figure Description

[0033] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0036] Figure 1 A cross-sectional structural diagram of the platform drive system provided in the embodiment of this application in the width direction of the gantry crane beam;

[0037] Figure 2 Here are structural diagrams of the first belt assembly and the second belt assembly;

[0038] Figure 3 This is an assembly structure diagram of the drive unit and the door assembly;

[0039] Figure 4 This is a structural diagram of part of the first belt assembly and part of the second belt assembly;

[0040] Figure 5 for Figure 3 Enlarged view of A in the middle;

[0041] Figure 6 This is a layout diagram of the first and second mounting components along the length of the platform.

[0042] Explanation of reference numerals in the attached figures:

[0043] 1. Gantry crane beam; 2. First gantry assembly; 21. First gantry; 3. Second gantry assembly; 31. Second gantry; 4. First belt assembly; 41. First front belt assembly; 42. First rear belt assembly; 43. First synchronous belt; 44. First drive mechanism; 45. First left tension roller; 46. First right tension roller; 47. First guide wheel; 48. First drive wheel; 5. Second belt assembly; 51. Second front belt assembly; 52. Second rear belt assembly; 6. First mounting component; 61. Upper axle pin; 62. Lower axle pin; 7. Second mounting component. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] In order to solve the problem of the large space occupied by existing platform door drive systems.

[0048] like Figure 1 and Figure 2As shown, this technical solution provides a platform door drive system, including a gantry beam 1. The gantry beam 1 is installed on the platform's stone beam, serving as the system's load-bearing foundation. It has a hollow rectangular structure with a length of 4200mm to accommodate the double-door travel. The lateral width (along the platform to the track direction) is designed to be 320mm or varying. This length and width can be adjusted according to the actual installation conditions of the platform. Inside the gantry beam 11, along its length, are two independent installation areas, each equipped with a drive unit for synchronously or independently driving the movement of the first door assembly 2 and the second door assembly 3.

[0049] Detailed, such as Figure 1 and Figure 2 As shown, the drive unit includes a first set of belt assemblies 4 for driving the first door assembly 2 to move and a second set of belt assemblies 5 for driving the second door assembly 3 to move; in the width direction section of the door machine beam 1, the mounting plane of the first set of belt assemblies 4 is higher than the mounting plane of the second set of belt assemblies 5 and the axial directions of the first set of belt assemblies 4 and the second set of belt assemblies 5 do not coincide.

[0050] In use, this design utilizes a "layered layout" to allow the first belt assembly 4 and the second belt assembly 5 to share the same lateral space, eliminating lateral clearance redundancy. Simultaneously, it employs axial misalignment, i.e., "axial staggered arrangement," to prevent the components of the first belt assembly 4 and the second belt assembly 5 from overlapping in projection, thereby reducing longitudinal safety clearance. This design achieves a dual compression of the lateral dimension and longitudinal height of the gantry beam 1, saving space. Furthermore, this design ensures that the first gate body 21 assembly and the second gate body assembly 3 do not interfere with each other during movement. When the two belt assemblies are driven, they operate within their respective planes, with their motion trajectories spatially separated, achieving physical isolation and non-interference, thus guaranteeing the stability of the entire drive system.

[0051] In addition, since the first door assembly 21 and the second door assembly 3 are driven by corresponding drive units, it should be understood that the drive units are electrically connected to an external controller to receive operation commands from the external controller, thereby driving the first door assembly 21 and the second door assembly 3 to move.

[0052] It should be noted that, as Figure 1 As shown, the door on the right side of the paper direction, which is closer to the platform, is the first door assembly 2, and the door on the left side of the paper direction, which is closer to the train, is the second door assembly 3.

[0053] like Figure 2 , Figure 3 , Figure 4As shown, the first door assembly 2 includes a plurality of first doors 21; one of the adjacent first doors 21 is fixedly connected to the synchronous belt in the first front belt assembly 41 through a first connector; the other first door 21 is connected to the first synchronous belt 43 in the first rear belt assembly 42 through another first connector.

[0054] The second door assembly 3 includes a plurality of second doors 31; one of the adjacent second doors 31 is fixedly connected to the timing belt in the second front belt assembly via a second connector, and the other second door 31 is fixedly connected to the second timing belt in the second front belt assembly 51 via another second connector.

[0055] When the controller simultaneously drives two drive units, the first door assembly 21 and the second door assembly 3 move synchronously to reveal or close the door position. When the controller only controls one drive unit, the corresponding first door assembly 21 or second door assembly 3 moves independently to reveal or close a single door position. In this embodiment, the controller automatically determines, according to the train model and a preset program, whether to control both sets of door assemblies simultaneously or control one set independently to ensure that the movement of the door assembly accurately matches the position of the train door.

[0056] The first connector is the part that connects the door body to the timing belt. In this embodiment, one end of the first connector is fixedly connected to the door body, and the other end is fixedly connected to the timing belt.

[0057] Furthermore, since the platform has multiple doors, but the platform is usually quite long and the width is relatively limited, if the platform is too wide, it will occupy the space of the pedestrian waiting area. This is to solve the problem of driving multiple doors to move without interfering with each other.

[0058] The first belt assembly 4 includes a first front belt assembly 41 and a first rear belt assembly 42; the second belt assembly 5 includes a second front belt assembly 51 and a second rear belt assembly 52; wherein the first front belt assembly 41 and the second front belt assembly are both located in the direction close to the platform, and the first rear belt assembly 42 and the second rear belt assembly 52 are both located in the direction close to the train.

[0059] In this embodiment, the first door assembly 21 and the second door assembly 3 are arranged alternately in a staggered manner, and the first door assembly 21 is driven to move by the first set of belt assemblies 4, while the second door assembly 3 is driven to move by the second set of belt assemblies 5.

[0060] like Figure 3As shown, the first door assembly 21 contains multiple first door panels 21 (numbered 1), and the second door assembly 3 contains multiple second door panels 31 (numbered 2). Along the length of the platform, all doors are arranged alternately in the order of 1, 2, 1, 2… Further, within the same first door assembly 21, its multiple first door panels 21 are arranged in the order of 1(1), 1(2), 1(1), 1(2)…, where door panel numbered 1(1) is driven by the first front belt assembly 41 in the first group of belt assemblies 4, and door panel numbered 1(2) is driven by the first rear belt assembly 42 in the same group of belt assemblies. Similarly, within the second door assembly 3, the doors are arranged in the order of 2(1), 2(2), 2(1), 2(2)… and are driven by the second front belt assembly and the second front belt assembly 51, respectively.

[0061] This design, with its four independent belt assemblies—the first front belt assembly 41, the first rear belt assembly 42, the second front belt assembly 51, and the second rear belt assembly 52—enables precise and flexible drive control for each door on the platform. It should be understood that this design establishes a dedicated, independently operable drive belt for each door, decoupling the door connected to the first front belt assembly 41 from the door connected to the first rear belt assembly 42 at the drive system level. This architecture provides the control system with flexibility, allowing it to not only command the entire first door assembly 21 or the second door assembly 3 to move synchronously, but also to precisely control the individual movement of any one of the belt assemblies.

[0062] For example, in scenario one: Figure 3 As shown, when the train door is positioned between the first door (numbered 1(2)) and the second door (numbered 2(2)), the first door (numbered 1(1)) is controlled to move to the left in the direction shown in the paper to make room for the first door (1(1)) to move to the position of the first door (1(1)) or to the position of the second door (2(1)). (Since the first door (21) and the second door (31) are staggered, when moving to the position of the second door (2(1)), it is not necessary to control the second door (2(1)) to move to the left to make room. When moving to the position of the first door (1(1)), the first door (1(1)) needs to move to the left to make room.)

[0063] Then control the second door (2) to move to the position of the first door (1) on the right (similarly, since the first door 21 and the second door 31 are staggered, it is not necessary to control the first door (1) to move to the right to make room) or control the second door (2) to move to the position of the second door (1) on the right (at this time, if it moves to the position of the second door (1), the second door (1) needs to move to the right to make room).

[0064] As for the first gate of number 1(2), it specifically refers to... Figure 3 The position of moving to the left side to position 1 (1) or to the position of the second door body numbered 2 (1) is determined by the opening position of the listed doors. For example, if train door 1 is located between the first door body numbered 1 (2) and the second door body numbered 2 (2), then the first door body numbered 1 (2) is moved to the left and the second door body numbered 2 (2) is moved to the right to expose the position of the train door.

[0065] In another scenario, such as scenario two: if the train door is located at the position of train door 2, then drive the first door body 1 (2) to move to the left to expose the position of the train door.

[0066] In summary, the first aspect of this technical solution is that by dividing the first set of belt assemblies 4 (including the first front and first rear belt assemblies 42) and the second set of belt assemblies 5 (including the second front belt assembly 51 and the second rear belt assembly 52) into "proximity to the platform / train direction", and arranging the first and second door body assemblies 3 in a staggered and alternating manner (arranged in the order of 1, 2, 1, 2... along the length of the platform), the problem of the platform being too wide and occupying the pedestrian waiting area is effectively avoided in scenarios with long platform length and limited width space, thus achieving efficient use of space; the second aspect is that the four independent belt assemblies build a dedicated and independently controllable drive path for each door body, decoupling different doors body at the drive system level, supporting both the synchronous movement of the first / second door body assemblies 3 and accurately controlling the individual movement of the corresponding door body driven by a single set of belt assemblies, greatly improving the precision and flexibility of door body drive; the third aspect is that, whether in scenario one, the position of the train door is revealed by controlling the movement of a specific door body (such as the first door body numbered 1 (1) and 1 (2), the second door body numbered 2 (2) etc.). In scenario 2, only the first door of the first door (number 1(2)) is moved to the left to reveal the position of the train door. In both scenarios, it is not necessary to link all doors. This simplifies the operation logic, shortens the response time of the door action, improves the efficiency of door opening, and reduces unnecessary power output to reduce energy consumption. At the same time, by reducing the number of coordinated actions of the doors, the risk of position deviation, jamming and interference when multiple doors are synchronously scheduled is avoided, ensuring the stability and accuracy of the door opening and closing actions. It can also reduce friction and transmission loss by reducing the frequency of component actions, and extend the service life of the drive system and door components. Fourthly, adjacent doors (such as the first door component and the second door component) can move in opposite directions along their respective independent transmission paths without compressing their own stroke to avoid each other. At the same time, the closed-loop transmission structure of the four independent belt components further ensures that the doors can move to the limit position within the length range of the gantry beam, so that the maximum distance between adjacent doors can cover the maximum opening of the train door, avoiding the problem that the train door cannot be fully opened due to insufficient travel of the platform door, and improving the system's adaptability to train doors with different openings.

[0067] Furthermore, in order to solve the problems of low transmission accuracy and unstable operation caused by the easy loosening of the synchronous belt in the traditional belt drive structure, as well as the poor belt guidance and easy deviation during the drive process.

[0068] Detailed, such as Figure 5As shown, both the first front belt assembly 41 and the first rear belt assembly 42 include a first synchronous belt 43, a first drive mechanism 44, a first left tension roller 45, a first right tension roller 46, and a first guide wheel 47. The output shaft of the first drive mechanism 44 is connected to a first drive wheel 48, the outer periphery of which meshes with the inner side of the first synchronous belt 43. The first left tension roller 45 and the first right tension roller 46 are respectively located on both sides of the first drive roller 48, and their outer peripheries mesh with the outer side of the first synchronous belt 43. The first guide wheels 47 are located on both sides away from the first drive mechanism 44, and their outer peripheries mesh with the inner side of the first synchronous belt 43. The first synchronous belt 43 surrounds the first drive wheel 48, the first left tension roller 45, the first right tension roller 46, and the first guide wheel 47 to form a closed loop. The first drive mechanism 44 drives the first synchronous belt 43 to move.

[0069] It should be understood that in each belt assembly, the synchronous belt forms a stable closed loop around the drive pulley, left tension roller, right tension roller and guide pulley. Each component is assembled in a preset position, and each tension roller is pre-adjusted to the tension of the synchronous belt to ensure stable initial transmission conditions.

[0070] In operation, the drive mechanism starts and rotates the drive pulley. The drive pulley, through engagement, drives the synchronous belt to move along a closed-loop path. During this movement, the left and right tension rollers continuously maintain the tension of the synchronous belt, preventing it from loosening due to stress or wear. The guide rollers restrict the movement of the synchronous belt, preventing belt deviation and ensuring stable power transmission. This technical solution utilizes the drive mechanism to rotate the drive pulley, achieving power transmission through the engagement between the drive pulley and the inner side of the synchronous belt. Simultaneously, by setting left and right tension rollers on both sides of the drive pulley that mesh with the outer side of the synchronous belt, the tension of the synchronous belt can be adjusted to prevent slack. Guide rollers, located on both sides away from the drive mechanism and meshing with the inner side of the synchronous belt, work together with the drive pulley and tension rollers to form a closed-loop structure, ensuring precise guidance during belt movement. Therefore, the accuracy and stability of the synchronous belt drive are improved, ensuring the precise movement of loads such as doors.

[0071] Furthermore, to avoid an excessively long arrangement of the entire drive system along the platform's length, specifically, the first front belt assembly 41 and the first rear belt assembly 42 share a parallel region L along the length of the gantry crane beam 1, but are not on the same plane in the width direction (e.g., ...). Figure 2 (As shown).

[0072] Specifically, by setting a parallel section along the length of the gantry beam 1 for the first front belt assembly 41 and the first rear belt assembly 42, and simultaneously arranging them in a layered manner (not on the same plane) along the width, three-dimensional space utilization is achieved. The parallel layout shortens the overall length of the system, while the layered arrangement avoids mechanical interference between the two belt assemblies. This allows the first front belt assembly 41 and the first rear belt assembly 42 to be structurally staggered, sharing a portion of the length space but maintaining a vertical separation. During operation, the first front belt assembly 41 and the first rear belt assembly 42 can operate independently or work collaboratively without interfering with each other. This design shortens the overall length of the drive system, improves space utilization, makes the structure more compact, and ensures the independent movement of the first front belt assembly 41 and the first rear belt assembly 42 and the stability of the system.

[0073] To ensure that the first front belt assembly 41 and the first rear belt assembly 42 do not interfere with each other during movement, a number of first mounting parts 6 are provided on the side wall perpendicular to the gantry beam 1; such as Figure 6 As shown, each of the first mounting components 6 is provided with an upper shaft pin 61 for mounting the first left tension roller 45 and the first right tension roller 46, and a lower shaft pin 62 for mounting the first guide wheel 47 is provided below the upper shaft pin 61; wherein, on the same first mounting component 6, the height of the upper shaft pin 61 exposed on the surface of the first mounting component 6 is higher than the height of the lower shaft pin 62 exposed on the surface of the first mounting component 6, and along the arrangement direction of the plurality of first mounting components 6, the exposed height of the upper shaft pin 61 of two adjacent first mounting components 6 alternately increases and decreases, and the exposed height of the lower shaft pin 62 also alternately decreases and increases accordingly.

[0074] Through the structural design and orderly arrangement of the first mounting component 6, a layered and staggered installation space is provided for the components of the first set of belt assemblies 4. On the one hand, a layered design of "upper shaft pin 61 and lower shaft pin 62" is adopted on a single first mounting component 6. The upper shaft pin 61 is used to install the first left tension roller 45 and the first right tension roller 46, and the lower shaft pin 62 is used to install the first guide wheel 47. The exposed height of the upper shaft pin 61 is higher than that of the lower shaft pin 62, so that the tension roller and the guide wheel form a height difference in the vertical direction, avoiding spatial overlap of different components on the same mounting component. On the other hand, along the arrangement direction of the first mounting component 6 (i.e., the length direction of the gantry beam 1), the exposed height of the upper shaft pin 61 of adjacent mounting components alternates to rise and fall, and the exposed height of the lower shaft pin 62 alternates to fall and rise accordingly. This alternating height design allows the first front belt assembly 41 and the first rear belt assembly 42, which are subsequently wrapped around the shaft pin components, to form a staggered transmission path, rather than a parallel overlapping path, preventing the paths of the two sets of belt assemblies from intersecting during movement.

[0075] In one specific embodiment, the upper shaft pin 61 of the current first mounting member 6 is mounted to the first left tension roller 45 and the first right tension roller 46 in the first front belt assembly 41, the lower shaft pin of the current first mounting member 6 is mounted to the first guide wheel 47 in the first rear belt assembly 42, the upper shaft pin 61 of the adjacent first mounting member 6 is mounted to the tension roller of the first rear belt assembly 42, and the lower shaft pin 62 is mounted to the guide wheel of the first front belt assembly 41.

[0076] When the first front belt assembly 41 and the first rear belt assembly 42 begin operation, the synchronous belts of the two belt assemblies wrap around the axle pins of their respective mounting components. Due to the height difference between the tension roller (upper axle pin 61) and the guide wheel (lower axle pin 62) on a single mounting component, the synchronous belts in the first front belt assembly 41 and the first rear belt assembly 42 are arranged in a staggered, layered manner along the vertical direction when passing over the same mounting component, to avoid friction and collision on the same plane. They maintain a vertical distance throughout their movement, preventing friction between the synchronous belts and avoiding jamming or misalignment due to overlapping paths. This staggered, layered structural design ensures that the tensioning and guiding functions are not affected by the other belt assembly, guaranteeing the transmission accuracy and stability of each belt assembly.

[0077] It should also be noted that there are two lower pins on the same mounting component, each with a guide wheel. One guide wheel is used to connect to the first rear belt assembly 42, and the other guide wheel is used to cooperate with the synchronous belt drive of the first rear belt assembly 42 corresponding to the adjacent first door body 21 along the length direction of the gantry beam 1.

[0078] Furthermore, a plurality of second mounting members 7 are provided on the side wall perpendicular to the gantry beam 1; the second mounting members 7 are located behind the first mounting members 6 and are lower than the first mounting members 6 in the vertical direction; the structure of the second mounting members 7 and their arrangement along the side wall of the gantry beam 1 are the same as those of the first mounting members 6; the upper shaft pin 61 of the second mounting member 7 is used to install the second left tension roller and the second right tension roller in the second front belt assembly, and its lower shaft pin 62 is used to install the second guide wheel in the second front belt assembly 51.

[0079] Specifically, a second mounting component 7 with the same structure and arrangement as the first mounting component 6 is provided on the side wall of the gantry beam 1, and it is positioned behind the first mounting component 6 and lower in the vertical direction, so that the second mounting component 7 and the first mounting component 6 are spatially offset, thereby indirectly allowing the first belt assembly and the second belt assembly to have their own operating areas in the operating space, so as to ensure that the first door body 21 assembly and the second door body assembly 3 do not interfere with each other when moving.

[0080] Simultaneously, through the same design logic as the first mounting component 6, the second front belt assembly and the second front belt assembly 51 also operate according to the arrangement and logic of the first front belt assembly 41 and the first rear belt assembly 42, which will not be elaborated further here. This ensures the uniformity of the entire drive system structure, reduces design and assembly complexity, and improves the overall spatial adaptability of the system.

[0081] In addition, the maintenance surfaces of both the first belt assembly 4 and the second belt assembly 5 face the platform direction, which is as follows: Figure 1 The right side as shown in the paper orientation.

[0082] It should be understood that oriented the maintenance surfaces of both belt conveyor assemblies towards the platform utilizes the relatively open space on the platform side to provide a convenient path for maintenance operations. For example, critical maintenance components of both belt conveyor assemblies (such as tension rollers, guide pulleys, and timing belt interfaces) face the platform side without any other obstructions. This allows workers to directly access the maintenance parts from the platform side without needing to enter the train side or disassemble other components. This design improves the convenience and efficiency of belt conveyor maintenance, reduces the impact on the normal operation of the platform screen doors during maintenance, and avoids occupying space on the train side during maintenance operations, thus reducing the risk of interference with the train or other equipment during maintenance.

[0083] In addition, a platform screen door is proposed, which includes a gate machine beam 1, a first gate body assembly 2, a second gate body assembly 3, and the aforementioned platform screen door drive system.

[0084] The first door assembly 2 and the second door assembly 3 are fixedly connected to the first and second belt assemblies in the drive system via connectors. The platform screen door also includes a top mounting structure, a lower guide rail, and a central control system. When the central control system issues a command, the drive unit operates, and the first belt assemblies 4 and the second belt assemblies 5 drive the first door assembly 2 and the second door assembly 3 to move synchronously or independently along the lower guide rail, thereby realizing the opening and closing of the platform screen door.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0086] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", 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 this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0088] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0089] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0090] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0091] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0092] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A platform door drive system, characterized in that, include: A gantry crane beam, wherein the gantry crane beam is provided with a drive unit for synchronously or independently driving the movement of the first gate assembly and the second gate assembly; The drive unit includes a first set of belt assemblies for driving the first door assembly to move and a second set of belt assemblies for driving the second door assembly to move. In the width direction section of the gantry crane beam, the mounting plane of the first set of belt assemblies is higher than the mounting plane of the second set of belt assemblies, and the axial directions of the first set of belt assemblies and the second set of belt assemblies do not coincide.

2. The platform door drive system according to claim 1, characterized in that: The first belt assembly includes a first front belt assembly and a first rear belt assembly; The second set of belt assemblies includes a second front belt assembly and a second rear belt assembly; The first front belt assembly and the second front belt assembly are both located near the platform, and the first rear belt assembly and the second rear belt assembly are both located near the train.

3. The platform door drive system according to claim 2, characterized in that: Both the first front belt assembly and the first rear belt assembly include a first synchronous belt, a first drive mechanism, a first left tension roller, a first right tension roller, and a first guide roller; The output shaft of the first drive mechanism is connected to a first drive wheel, and the outer periphery of the first drive wheel is meshed with the inner side of the first synchronous belt. The first left tension roller and the first right tension roller are respectively provided on both sides of the first drive wheel. The outer periphery of the first left tension roller and the first right tension roller are meshed with the outer side of the first synchronous belt. The first guide wheels are respectively provided on both sides away from the first drive mechanism, and the outer periphery of the two first guide wheels is engaged with the inner side of the first synchronous belt. The first synchronous belt surrounds the first drive pulley, the first left tension roller, the first right tension roller and the first guide pulley to form a closed loop, and the first drive mechanism is used to drive the first synchronous belt to move.

4. A platform door drive system according to claim 2, characterized in that: Along the length of the gantry crane beam, the first front belt assembly and the first rear belt assembly have a parallel area but are not on the same plane in the width direction.

5. A platform door drive system according to claim 2, characterized in that: The first gate assembly includes a plurality of first gates; The adjacent first door body is fixedly connected to the timing belt in the first front belt assembly via a first connector; Another first door body is connected to the first synchronous belt in the first rear belt assembly via another first connector.

6. A platform door drive system according to claim 2, characterized in that: The second gate assembly includes a plurality of second gates; One of the adjacent second doors is fixedly connected to the timing belt in the second front belt assembly via a second connector, and the other second door is fixedly connected to the second timing belt in the second rear belt assembly via another second connector.

7. A platform door drive system according to claim 3, characterized in that: A number of first mounting components are provided on the side wall perpendicular to the gantry crane beam; Each of the first mounting components is provided with an upper shaft pin for mounting the first left tension roller and the first right tension roller, and a lower shaft pin for mounting the first guide wheel is provided below the upper shaft pin. In this context, on the same first mounting component, the height of the upper shaft pin exposed on the surface of the first mounting component is higher than the height of the lower shaft pin exposed on the surface of the first mounting component. Furthermore, along the arrangement direction of the plurality of first mounting components, the exposed height of the upper shaft pin of two adjacent first mounting components alternately increases and decreases, and the exposed height of the lower shaft pin also alternately decreases and increases accordingly.

8. A platform door drive system according to claim 7, characterized in that: The upper shaft pin of the current first mounting component is used to install the first left tension roller and the first right tension roller in the first front belt assembly. The lower shaft pin of the current first mounting component is used to install the first guide wheel in the first rear belt assembly. The upper shaft pin of the adjacent first mounting component is used to install the tension roller of the first rear belt assembly, and its lower shaft pin is used to install the guide wheel of the first front belt assembly.

9. A platform door drive system according to claim 1, characterized in that: The maintenance surfaces of both the first and second belt conveyor assemblies face the platform.

10. A platform screen door, characterized in that: The platform door drive system includes any one of claims 1-9.

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