Barrier-free access device for mobile shelter

Abstract

This invention discloses an accessible device for mobile shelters, comprising a door at the exit of the mobile shelter, a power assembly inside the mobile shelter, a transfer assembly connected to the power assembly, and a ramp assembly on the transfer assembly. By incorporating a power assembly, the invention achieves simultaneous lifting and lowering via a single power source while simultaneously opening, closing, and extending the door, effectively reducing operational steps and increasing the device's operating speed, thereby improving the shelter's transfer efficiency. The transfer assembly allows for the transfer of disabled individuals from the ground to the shelter via lifting, while simultaneously securing and limiting the wheelchair used by the disabled individual during the transfer process. The ramp assembly further reduces obstruction to the wheelchair when entering the transfer assembly while simultaneously adjusting the disabled individual's position.

Description

Technical Field

[0001] This invention relates to the field of barrier-free access technology, specifically a barrier-free access device for mobile cabins. Background Technology

[0002] Accessible mobile hospitals are an innovative solution combining autonomous driving technology and mobile healthcare services, designed to provide safe, convenient, and comfortable medical care for all users, especially wheelchair users. These mobile hospitals can move autonomously in various environments and are equipped with specially designed accessibility systems to ensure that people with disabilities can easily enter and exit and receive necessary medical support.

[0003] A search revealed Chinese patent CN116549227B, which includes a modular cabin body. The bottom of the cabin body has a hidden groove at the exit. A pushing component is installed within this groove. A cross seat is mounted on both movable ends of the pushing component. A lifting component is mounted on the cross seat. A lifting tray is fixedly mounted on the movable end of the lifting component. Two adjustable components are symmetrically installed on one inner wall of the cabin body. Through the hidden groove, pushing component, cross seat, lifting component, and lifting tray, when a person with disabilities is riding in an autonomous driving cabin in a wheelchair, the lifting tray can be automatically placed on the ground. This facilitates the movement of the wheelchair onto the lifting tray, and then the lifting tray automatically moves the person with disabilities and their wheelchair into the cabin, making it more convenient for them to ride in the cabin.

[0004] However, in the aforementioned patent, after a person with disabilities enters the cabin using the lifting mechanism, they still need to move a short distance to ensure they are positioned on the steering mechanism before the wheelchair can be steered and secured. If the cabin suddenly moves during the movement of the person with disabilities, the wheelchair may tip over due to inertia. On the other hand, the lifting, telescopic, and steering / secure functions in the aforementioned patent are not interconnected, requiring personnel to individually control the sequence of operation of each function, which leads to cumbersome operation steps. Summary of the Invention

[0005] The purpose of this invention is to provide a barrier-free access device for mobile cabins, which has the advantages of barrier-free access and self-balancing fixation, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a barrier-free access device for a mobile cabin, comprising a door installed at the exit of the mobile cabin, a power assembly installed inside the mobile cabin, a transfer assembly drivenly connected to the power assembly, and a ramp assembly installed on the transfer assembly. The power assembly includes an opening and closing mechanism for controlling the horizontal movement of the door and a telescopic mechanism for controlling the telescopic mechanism. The opening and closing mechanism is fixedly connected to the door, and the telescopic mechanism is drivenly connected to the opening and closing mechanism.

[0007] The transfer assembly includes a lifting mechanism for height control and a limiting mechanism for securing a wheelchair for a person with disabilities. The lifting mechanism is connected to the telescopic mechanism, and the limiting mechanism is connected to the lifting mechanism.

[0008] The ramp assembly includes a tilting mechanism to reduce resistance when a wheelchair enters and a steering mechanism to adjust the wheelchair's orientation and position. The tilting mechanism is mounted on the lifting mechanism, and the steering mechanism is rotatably connected to the lifting mechanism.

[0009] Preferably, the opening and closing mechanism includes a drive shaft driven by a motor and fixedly connected to the inner contour of the hatch. An opening and closing wheel is fixedly connected to the outer contour of the drive shaft. A bevel gear is fixedly connected to one side of the opening and closing wheel, and the bevel gear also passes through and is fixedly connected to the drive shaft. An opening and closing rack is meshed and driven on the outer contour of the bevel gear and is fixedly connected to the inner wall of the mobile cabin. An extension plate is fixedly connected to the end of the opening and closing rack away from the bevel gear. The extension plate is vertically passed through and rotatably connected to a positioning shaft, and the positioning shaft is rotatably connected to the interior of the mobile cabin. A second bevel gear is fixedly connected to the outer contour of the positioning shaft near the top.

[0010] Preferably, the telescopic mechanism includes a telescopic wheel that passes through and is fixedly connected to the outer contour of the positioning shaft near the bottom end. The lower half of the outer contour of the telescopic wheel is engaged with and driven by a telescopic rack. A telescopic plate is fixedly connected to the side of the telescopic rack. A bracket is fixedly connected to the upper surface of the telescopic rack away from the telescopic wheel. A first transmission wheel passes through and is rotatably connected to one side of the bracket, and the first transmission wheel is engaged with the upper half of the outer contour of the telescopic wheel. A second transmission wheel is fixedly connected to the top of the first transmission wheel, and the second transmission wheel also passes through and is rotatably connected to the bracket.

[0011] Preferably, a counterweight block for maintaining the balance of the telescopic plate is disposed inside the end of the telescopic plate away from the telescopic wheel.

[0012] Preferably, the lifting mechanism includes a chain that is engaged with and driven to the outer contour of the transmission wheel, and the other end of the chain is engaged with and driven to a lifting wheel. A lifting screw is threaded through and screwed to the shaft of the lifting wheel. The bottom end of the lifting screw is fixedly connected to a transfer platform that is slidably connected to the inner contour of the telescopic plate. A turning hole is opened on the surface of the transfer platform, and a limit frame is fixedly connected to the upper surface of the transfer platform.

[0013] Preferably, the limiting mechanism includes a sleeve fixedly connected to the upper surface of the lifting wheel and sleeved outside the lifting screw. A winding rope is wound on the outer contour of the sleeve. The winding rope passes through and is slidably connected to the inside of the limiting frame. A guide wheel one and a guide wheel two are initially connected to the outer contour of the winding rope, and both guide wheels one and two are rotatably connected to the outer contour of the limiting frame. The other end of the winding rope is fixedly connected to a limiting plate located inside the limiting frame. A return spring is fixedly connected between the limiting plate and the inner contour of the limiting frame.

[0014] Preferably, the flipping mechanism includes a base fixedly connected to both sides of the top of the transfer platform. Limiting pins are fixedly connected to both sides of the opposite surface of the base. A fixing pin is fixedly connected to the inner contour of the transfer platform at the middle position of the two limiting pins. A compression spring is fixedly connected to the outer contour of the fixing pin. A swing rod is rotatably connected to the other end of the compression spring. A positioning block is rotatably connected to the middle section of the swing rod through a pin shaft. The pin shaft of the positioning block extends outward through the positioning block and is rotatably connected to the top of the opposite surface of the base. The same slope is fixedly connected to the opposite surface of the positioning block. Positioning pins are fixedly connected to both ends of the positioning block on the side away from the slope.

[0015] Preferably, the steering mechanism includes a turntable that is rotatably connected to the inner contour of the steering hole. A fixed shaft extending downward is fixedly connected through the axis of the turntable. A ratchet is fixedly connected to the outer contour of the bottom end of the fixed shaft. A gear ring is unidirectionally engaged and driven on the outer contour of the ratchet. A steering rack is engaged and driven on the outer contour of the gear ring, and the steering rack is fixedly connected to the bottom plate of the inner wall of the mobile cabin.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. By setting up a power component, the present invention can realize the lifting function synchronously through a single power source while performing the functions of opening and closing and extending and retracting the hatch. This effectively saves the operation steps of personnel, increases the operating speed of the device, and thus improves the transfer efficiency of the container.

[0018] 2. This invention uses a transfer component to transfer disabled persons from the ground to the mobile cabin via lifting, and simultaneously limits and fixes the wheelchairs used by the disabled persons during the transfer process.

[0019] 3. By setting up a ramp component, the present invention further reduces the obstruction of wheelchairs when entering the transfer component, while simultaneously adjusting the position of the disabled person. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a cross-sectional view of the main structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the opening and closing mechanism of the present invention;

[0023] Figure 4 This is a schematic diagram of the telescopic mechanism of the present invention;

[0024] Figure 5 This is a schematic diagram of the lifting mechanism of the present invention;

[0025] Figure 6 This is a schematic diagram of the limiting mechanism of the present invention;

[0026] Figure 7 This is a schematic diagram of the flipping mechanism of the present invention;

[0027] Figure 8 This is a schematic diagram of the steering mechanism of the present invention;

[0028] Figure 9 This is a flowchart illustrating the overall workflow of the present invention.

[0029] In the diagram: 1. Cabin door; 2. Drive shaft; 21. Opening / closing wheel; 22. Bevel gear one; 23. Opening / closing rack; 24. Extension plate; 25. Positioning shaft; 26. Bevel gear two; 3. Telescopic wheel; 31. Telescopic rack; 32. Telescopic plate; 33. Bracket; 34. Transmission wheel one; 35. Transmission wheel two; 4. Chain; 41. Lifting wheel; 42. Lifting screw; 43. Transfer platform; 44. Steering hole; 45. Limiting frame; 5. Sleeve; 51. Winding rope; 52. Guide wheel one; 53. Guide wheel two; 54. Limiting plate; 55. Return spring; 6. Base; 61. Limiting pin; 62. Fixing pin; 63. Compression spring; 64. Swivel rod; 65. Positioning block; 66. Slope; 67. Positioning pin; 7. Turntable; 71. Fixing shaft; 72. Ratchet; 73. Gear ring; 74. Steering rack. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0031] Example 1:

[0032] See also Figures 1 to 9 The present invention provides a technical solution: a barrier-free access device for a mobile cabin, comprising a door 1 installed at the exit of the mobile cabin, a power component installed inside the mobile cabin, a transfer component that is drivenly connected to the power component, and a ramp component installed on the transfer component. The power component includes an opening and closing mechanism for controlling the horizontal movement of the door 1 and a telescopic mechanism for controlling the transfer component. The opening and closing mechanism is fixedly connected to the door 1, and the telescopic mechanism is drivenly connected to the opening and closing mechanism.

[0033] The transfer assembly includes a lifting mechanism for height control and a limiting mechanism for securing a wheelchair for a person with disabilities. The lifting mechanism is connected to the telescopic mechanism, and the limiting mechanism is connected to the lifting mechanism.

[0034] The ramp assembly includes a tilting mechanism to reduce resistance when a wheelchair enters and a steering mechanism to adjust the wheelchair's orientation and position. The tilting mechanism is mounted on the lifting mechanism, and the steering mechanism is rotatably connected to the lifting mechanism.

[0035] In this device, the opening and closing mechanism is driven by a single power source. The opening and closing mechanism enables the horizontal sliding of the hatch 1 to complete the opening and closing process of the mobile cabin. Then, it further drives the telescopic mechanism to realize the extension and retraction of the barrier-free access device. After the telescopic mechanism extends to its maximum stroke, it automatically switches to the lifting mechanism. The lifting mechanism is further lowered to the ground, at which point the disabled person enters the lifting mechanism on their own.

[0036] During the process of a person with disabilities entering the lifting mechanism, the tilting mechanism works simultaneously to reduce the resistance encountered by the wheelchair when climbing the slope. At the same time, it automatically tilts after the wheelchair enters to limit the wheelchair. Subsequently, the wheelchair, along with the lifting mechanism and the telescopic mechanism, resets to achieve the transfer function.

[0037] During the retraction mechanism's reset process, the steering mechanism works simultaneously and rotates the wheelchair's orientation 180° to ensure that the person with disabilities faces the door 1, thus assisting in the subsequent disembarkation process. On the other hand, during the lifting mechanism's raising process, the limiting mechanism works simultaneously, squeezing and clamping the wheelchair to achieve its limiting and fixing process, while further adjusting the wheelchair's orientation to face the exit, further alleviating the problem of greater resistance for the person with disabilities when disembarking due to the difficulty of the wheelchair's autonomous steering.

[0038] Example 2:

[0039] See also Figures 3-4 This embodiment further illustrates the concept based on Embodiment 1:

[0040] The opening and closing mechanism includes a drive shaft 2 driven by a motor and fixedly connected to the inner contour of the hatch 1. An opening and closing wheel 21 is fixedly connected to the outer contour of the drive shaft 2. A bevel gear 22 is fixedly connected to one side of the opening and closing wheel 21 and is also passed through and fixedly connected to the drive shaft 2. An opening and closing rack 23 is meshed and driven on the outer contour of the bevel gear 22 and is fixedly connected to the inner wall of the mobile cabin. An extension plate 24 is fixedly connected to the end of the opening and closing rack 23 away from the bevel gear 22. The extension plate 24 is vertically passed through and rotatably connected to a positioning shaft 25 and the positioning shaft 25 is rotatably connected to the interior of the mobile cabin. A bevel gear 26 is fixedly connected to the outer contour of the positioning shaft 25 near the top.

[0041] The telescopic mechanism includes a telescopic wheel 3 that passes through and is fixedly connected to the outer contour of the positioning shaft 25 near the bottom end. The lower half of the outer contour of the telescopic wheel 3 is engaged with and driven by a telescopic rack 31. A telescopic plate 32 is fixedly connected to the side of the telescopic rack 31. A bracket 33 is fixedly connected to the upper surface of the telescopic rack 31 away from the telescopic wheel 3. A transmission wheel 34 passes through and is rotatably connected to one side of the bracket 33, and the transmission wheel 34 engages with the upper half of the outer contour of the telescopic wheel 3. A transmission wheel 35 is fixedly connected to the top of the transmission wheel 34, and the transmission wheel 35 also passes through and is rotatably connected to the bracket 33.

[0042] The telescopic plate 32 is equipped with a counterweight block inside the end away from the telescopic wheel 3 to maintain the balance of the telescopic plate 32.

[0043] As can be seen from Embodiment 1, when the motor drives the drive shaft 2 to rotate clockwise, the opening and closing of the hatch 1 and the extension of the telescopic mechanism are realized. When the drive shaft 2 rotates clockwise, the opening and closing wheel 21 and the bevel gear 22 rotate synchronously. Since the opening and closing rack 23 meshes with the opening and closing wheel 21 and the opening and closing rack 23 is fixedly connected to the inside of the mobile cabin, that is, the position of the opening and closing rack 23 is fixed, the rotation of the opening and closing wheel 21 will drive the bevel gear 22, the drive shaft 2 and the hatch 1 to move horizontally synchronously along the direction of the opening and closing rack 23, thereby realizing the opening process of the hatch 1. At this time, the mobile cabin is in the open state.

[0044] When the opening and closing wheel 21 drives the hatch 1 to move horizontally to its maximum stroke, the opening and closing wheel 21 disengages from the opening and closing rack 23. At this time, the first bevel gear 22 and the second bevel gear 26 mesh and are connected in transmission. That is, the continued clockwise rotation of the drive shaft 2 will drive the positioning shaft 25 and the telescopic wheel 3 to rotate synchronously via the second bevel gear 26. Since the opening and closing wheel 21 disengages from the opening and closing rack 23, the rotation of the opening and closing wheel 21 will not be affected by the opening and closing rack 23 and will not change the horizontal position of the hatch 1. The mobile container will remain open.

[0045] Furthermore, the telescopic wheel 3 rotates synchronously with the bevel gear 22, and further drives the telescopic rack 31 and telescopic plate 32 to extend out from inside the mobile cabin. The transfer assembly and ramp assembly extend synchronously to achieve the extension process of barrier-free passage.

[0046] It should be noted that as the telescopic rack 31 and telescopic plate 32 extend continuously, when the telescopic wheel 3 disengages from the telescopic rack 31, the movement of the telescopic rack 31 and telescopic plate 32 stops. At this time, the transfer assembly and the ramp assembly extend synchronously to their maximum stroke. Subsequently, the telescopic wheel 3 engages with the first transmission wheel 34 and further drives the first transmission wheel 34 and the second transmission wheel 35 to rotate synchronously. When the telescopic plate 32 extends to its maximum stroke and stops moving, the counterweight inside the telescopic plate 32 can effectively maintain the horizontal state of the telescopic plate 32 and the transfer assembly, thereby improving the transfer quality of the device.

[0047] Example 3:

[0048] See also Figures 5-6 This embodiment further illustrates the concept based on Embodiment 2:

[0049] The lifting mechanism includes a chain 4 that is engaged with and driven to the outer contour of the transmission wheel 35. The other end of the chain 4 is engaged with and driven to a lifting wheel 41. A lifting screw 42 is threaded through and screwed to the shaft of the lifting wheel 41. The bottom end of the lifting screw 42 is fixedly connected to a transfer platform 43 that is slidably connected to the inner contour of the telescopic plate 32. A turning hole 44 is provided on the surface of the transfer platform 43. A limit frame 45 is fixedly connected to the upper surface of the transfer platform 43.

[0050] The limiting mechanism includes a sleeve 5 fixedly connected to the upper surface of the lifting wheel 41 and sleeved outside the lifting screw 42. A winding rope 51 is wound on the outer contour of the sleeve 5. The winding rope 51 passes through and is slidably connected to the inside of the limiting frame 45. A guide wheel 1 52 and a guide wheel 2 53 are connected to the outer contour of the winding rope 51 for primary transmission. Both guide wheels 1 52 and 2 53 pass through and are rotatably connected to the outer contour of the limiting frame 45. The other end of the winding rope 51 is fixedly connected to a limiting plate 54 located inside the limiting frame 45. A return spring 55 is fixedly connected between the limiting plate 54 and the inner contour of the limiting frame 45.

[0051] As shown in Embodiment 2, the clockwise rotation of the drive shaft 2 enables the opening of the hatch 1. After the hatch 1 is opened, the telescopic plate 32 extends. Subsequently, the telescopic wheel 3 meshes with the transmission wheel 34 and drives the transmission wheel 34 and the transmission wheel 35 to rotate synchronously. The transmission wheel 35 further drives the chain 4 and the lifting wheel 41 to rotate synchronously. Since the lifting screw 42 is fixedly connected to the transfer platform 43, and the transfer platform 43 is limited by the telescopic plate 32, the screw connection between the lifting screw 42 and the lifting wheel 41 will drive the lifting screw 42 and the transfer platform 43 to descend synchronously under the rotation of the lifting wheel 41 until the transfer platform 43 contacts the ground. At this time, the ramp assembly is lowered to the ground synchronously.

[0052] At the same time, during the lowering process of the lifting mechanism, the limiting mechanism works synchronously. The lifting wheel 41 drives the sleeve 5 to rotate synchronously, and the sleeve 5 synchronously winds up the winding rope 51. At this time, the winding rope 51 slides inside the limiting frame 45 and is further pulled towards the inner wall of the limiting frame 45 by the guidance of the first guide wheel 52 and the second guide wheel 53. Meanwhile, the return spring 55 is gradually compressed, and the distance between the two limiting plates 54 continues to increase to ensure that the wheelchair can smoothly enter the interior of the limiting frame 45.

[0053] Subsequently, as the lifting mechanism rises, the sleeve 5 continuously releases the winding rope 51. At this time, the limiting plate 54 gradually approaches under the rebound action of the return spring 55 to squeeze and clamp the wheelchair, thereby completing the limiting and fixing of the wheelchair to reduce the risk of the wheelchair shaking when the mobile cabin is in motion. Furthermore, since it is difficult for the wheelchair to turn autonomously, the disabled person may be in an oblique direction when entering the limiting frame 45. At this time, the clamping of the two limiting plates 54 can further adjust the orientation angle of the wheelchair to make it face the same direction so as to facilitate the subsequent disembarkation process.

[0054] Example 4:

[0055] See also Figures 7-8 This embodiment further illustrates the concept based on Embodiment 3:

[0056] The flipping mechanism includes bases 6 fixedly connected to both sides of the top of the transfer platform 43. Limiting pins 61 are fixedly connected to both sides of the opposite surface of the bases 6. A fixing pin 62 is fixedly connected to the inner contour of the transfer platform 43 at the middle position of the two limiting pins 61. A compression spring 63 is fixedly connected to the outer contour of the fixing pin 62. A deflecting rod 64 is rotatably connected to the other end of the compression spring 63. A positioning block 65 is rotatably connected to the middle section of the deflecting rod 64 through a pin shaft. The pin shaft of the positioning block 65 extends outward through and is rotatably connected to the top of the opposite surface of the base 6. The same slope 66 is fixedly connected to the opposite surface of the positioning block 65. Positioning pins 67 are fixedly connected to both ends of the side of the positioning block 65 away from the slope 66.

[0057] The steering mechanism includes a turntable 7 that is rotatably connected to the inner contour of the steering hole 44. A fixed shaft 71 extending downward is fixedly connected through the axis of the turntable 7. A ratchet 72 is fixedly connected to the outer contour of the bottom end of the fixed shaft 71. A gear ring 73 is unidirectionally engaged and driven on the outer contour of the ratchet 72. A steering rack 74 is engaged and driven on the outer contour of the gear ring 73. The steering rack 74 is fixedly connected to the bottom plate of the inner wall of the mobile cabin.

[0058] During the process of the wheelchair entering the limiting frame 45, it needs to pass through the flipping mechanism first. Due to the uncertainty of the stopping location of the mobile cabin, there may be a slope difference between the ground and the limiting frame 45. At this time, the resistance when the wheelchair enters the limiting frame 45 is relatively large. Therefore, the slope design of the slope 66 is used to effectively reduce the resistance when the wheelchair enters the limiting frame 45.

[0059] When the wheelchair is above the ramp 66, as the wheelchair moves, the ramp 66 is compressed, causing its center of gravity to shift continuously. After the wheelchair passes the middle section of the ramp 66, the ramp 66 causes the positioning block 65 to deflect synchronously. At this time, the positioning pin 67 on the outside contacts the swing rod 64 and causes the swing rod 64 to deflect synchronously. The bottom end of the swing rod 64 further pulls the compression spring 63 to release in the opposite direction. Then the tilting direction of the ramp 66 automatically reverses, and the wheelchair can naturally slide into the limit frame 45 on the ramp 66, thereby effectively reducing the resistance encountered by the wheelchair when entering the limit frame 45.

[0060] It should be noted that during the deflection of the ramp 66, the compression spring 63 is continuously compressed and released by the pull of the swing rod 64. Thus, the compression spring 63 resists the swing rod 64 when it returns to its original position, so that the ramp 66 always remains tilted without external force. In addition, after the wheelchair passes, the slope of the ramp 66 can also cooperate with the limiting plate 54 to achieve the function of limiting and fixing the wheelchair, which further improves the stability of the wheelchair when it is moving in the mobile cabin.

[0061] On the other hand, when the wheelchair gets off, it needs to pass over the ramp 66 again, and at this time the tilt direction of the ramp 66 is towards the inside of the limit frame 45. The flipping mechanism works again and completes the reset process, thereby effectively reducing the bumpy feeling when the wheelchair gets off. At the same time, the automatic reset of the flipping mechanism can further ensure the continuous operation of the device.

[0062] Furthermore, after the wheelchair enters the limiting frame 45 and is fixed in place, the drive shaft 2 rotates in the opposite direction. At this time, the drive shaft 2 drives the lifting mechanism to lift the wheelchair synchronously. When the lifting screw 42 and the transfer platform 43 rise to their maximum stroke, the lifting wheel 41 can no longer rotate. As a result, the transmission wheel 35 and the transmission wheel 34 cannot rotate synchronously with the telescopic wheel 3. That is, the rotation of the transmission wheel 35 at this time will cause the transmission wheel 34 to move towards the interior of the mobile cabin and cause the telescopic rack 31 to re-engage with the telescopic wheel 3. At this time, the telescopic rack 31 drives the telescopic plate 32 to retract.

[0063] Similarly, when the telescopic plate 32 retracts to its maximum stroke, the telescopic plate 32 cannot continue to move, causing the telescopic wheel 3, bevel gear 26 and positioning shaft 25 to stop rotating. At this time, the rotation of bevel gear 22 will cause it to move horizontally again along the direction of the opening and closing rack 23, thereby completing the reset process. The opening and closing wheel 21, drive shaft 2 and hatch 1 reset along with the opening and closing wheel 21. At this time, the hatch 1 closes to complete the closing operation of the mobile cabin.

[0064] Subsequently, as the transfer platform 43 retracts into the mobile cabin along with the telescopic plate 32, the steering mechanism works synchronously. At this time, the gear ring 73 contacts and rotates with the steering rack 74 located inside the cabin. The gear ring 73 further drives the ratchet 72, the fixed shaft 71, and the turntable 7 to rotate synchronously. At this time, the wheelchair located on the upper surface of the turntable 7 rotates 180° synchronously, so that the wheelchair faces the exit of the mobile cabin, so as to facilitate the disembarkation of people with disabilities.

[0065] It should be noted that during the extension of the transfer platform 43, the gear ring 73 will also contact and rotate with the steering rack 74. However, due to the one-way transmission between the ratchet 72 and the gear ring 73, the rotation of the gear ring 73 will not drive the ratchet 72 to rotate. That is, the steering mechanism adjusts the orientation of the wheelchair only within the retraction stroke of the telescopic mechanism. At this time, the wheelchair is limited and fixed by the limiting plate 54, thereby preventing the wheelchair from tipping over unexpectedly during steering.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A barrier-free access device for a mobile cabin, comprising a door (1) at the exit of the mobile cabin, a power assembly disposed within the mobile cabin, a transfer assembly connected to the power assembly, and a ramp assembly disposed on the transfer assembly, characterized in that: The power assembly includes an opening and closing mechanism for controlling the horizontal movement of the hatch (1) and a telescopic mechanism for controlling the transfer assembly. The opening and closing mechanism is fixedly connected to the hatch (1), and the telescopic mechanism is drivenly connected to the opening and closing mechanism. The transfer assembly includes a lifting mechanism for height control and a limiting mechanism for securing the wheelchair of the disabled person. The lifting mechanism is connected to the telescopic mechanism, and the limiting mechanism is connected to the lifting mechanism. The ramp assembly includes a tilting mechanism to reduce resistance when a wheelchair enters and a steering mechanism to adjust the wheelchair's orientation and position. The tilting mechanism is mounted on the lifting mechanism, and the steering mechanism is rotatably connected to the lifting mechanism.

2. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The opening and closing mechanism includes a drive shaft (2) driven by a motor and fixedly connected to the inner contour of the hatch (1). An opening and closing wheel (21) is fixedly connected to the outer contour of the drive shaft (2). A bevel gear (22) is fixedly connected to one side of the opening and closing wheel (21), and the bevel gear (22) also passes through and is fixedly connected to the drive shaft (2). An opening and closing rack (23) is meshed and driven on the outer contour of the bevel gear (22), and the opening and closing rack (23) is fixedly connected to the inner wall of the mobile cabin. An extension plate (24) is fixedly connected to the end of the opening and closing rack (23) away from the bevel gear (22). The extension plate (24) is vertically penetrated and rotatably connected to a positioning shaft (25), and the positioning shaft (25) is rotatably connected to the interior of the mobile cabin. A bevel gear (26) is fixedly connected to the outer contour of the positioning shaft (25) near the top.

3. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The telescopic mechanism includes a telescopic wheel (3) that passes through and is fixedly connected to the outer contour of the positioning shaft (25) near the bottom end. The lower half of the outer contour of the telescopic wheel (3) is engaged with and driven by a telescopic rack (31). A telescopic plate (32) is fixedly connected to the side of the telescopic rack (31). A bracket (33) is fixedly connected to the upper surface of the telescopic rack (31) away from the telescopic wheel (3). A transmission wheel (34) passes through and is rotatably connected to one side of the bracket (33), and the transmission wheel (34) is engaged with the upper half of the outer contour of the telescopic wheel (3). A transmission wheel (35) is fixedly connected to the top of the transmission wheel (34), and the transmission wheel (35) also passes through and is rotatably connected to the bracket (33).

4. The barrier-free access device for a mobile cabin according to claim 3, characterized in that: The telescopic plate (32) is equipped with a counterweight block inside the end away from the telescopic wheel (3) to maintain the balance of the telescopic plate (32).

5. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The lifting mechanism includes a chain (4) meshing with and drivingly connected to the outer contour of the transmission wheel (35). The other end of the chain (4) meshes with and drives a lifting wheel (41). A lifting screw (42) is threaded through and screwed to the shaft of the lifting wheel (41). The bottom end of the lifting screw (42) is fixedly connected to a transfer platform (43) that is slidably connected to the inner contour of the telescopic plate (32). A turning hole (44) is opened on the surface of the transfer platform (43). A limit frame (45) is fixedly connected to the upper surface of the transfer platform (43).

6. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The limiting mechanism includes a sleeve (5) fixedly connected to the upper surface of the lifting wheel (41) and sleeved outside the lifting screw (42). A winding rope (51) is wound on the outer contour of the sleeve (5). The winding rope (51) passes through and is slidably connected to the inside of the limiting frame (45). A guide wheel one (52) and a guide wheel two (53) are connected to the outer contour of the winding rope (51) for primary transmission. Both guide wheel one (52) and guide wheel two (53) pass through and are rotatably connected to the outer contour of the limiting frame (45). The other end of the winding rope (51) is fixedly connected to a limiting plate (54) located inside the limiting frame (45). A return spring (55) is fixedly connected between the limiting plate (54) and the inner contour of the limiting frame (45).

7. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The flipping mechanism includes a base (6) fixedly connected to both sides of the top of the transfer platform (43). Limiting pins (61) are fixedly connected to both sides of the opposite surface of the base (6). A fixing pin (62) is fixedly connected to the inner contour of the transfer platform (43) at the middle position of the two limiting pins (61). A compression spring (63) is fixedly connected to the outer contour of the fixing pin (62). The other end of the compression spring (63) is rotatably connected to a swing rod (64). The middle section of the swing rod (64) is penetrated and rotatably connected to a positioning block (65) through a pin shaft. The pin shaft of the positioning block (65) extends outward and penetrates and rotatably connects to the top of the opposite surface of the base (6). The same slope (66) is fixedly connected to the opposite surface of the positioning block (65). Both ends of the positioning block (65) away from the slope (66) are fixedly connected to positioning pins (67).

8. The barrier-free access device for a mobile cabin according to claim 1, characterized in that: The steering mechanism includes a turntable (7) that is rotatably connected to the inner contour of the steering hole (44). The turntable (7) is penetrated and fixedly connected to a downwardly extending fixed shaft (71). A ratchet (72) is fixedly connected to the outer contour of the bottom end of the fixed shaft (71). A gear ring (73) is unidirectionally engaged and driven on the outer contour of the ratchet (72). A steering rack (74) is engaged and driven on the outer contour of the gear ring (73). The steering rack (74) is fixedly connected to the bottom plate of the inner wall of the mobile cabin.

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