Boarding and alighting auxiliary device for motor home

Abstract

The invention provides a getting-on and getting-off auxiliary device for a motor home, and belongs to the technical field of motor home auxiliary equipment. A folding crane is arranged in the storage bin, a supporting plate is arranged at the movable end of the folding crane, and two groups of hoisting mechanisms are arranged on the supporting plate; lifting tables are mounted at the tail ends of steel wire ropes of the two groups of hoisting mechanisms; guardrails are arranged on the two sides of the lifting table, and the two guardrails can rotate between a folding posture parallel to the top of the lifting table and an unfolding posture perpendicular to the surface of the lifting table; wherein a sliding rail is arranged on one group of guardrails and the lifting platform, the sliding rail is L-shaped, a bearing plate slides on the sliding rail, the bearing plate can slide between an extending position perpendicular to the inner side of the lifting platform and a retracting position horizontal to the inner side of the lifting platform along the sliding rail, and a hook for hanging a wheelchair is arranged on the bearing plate; the problem that a traditional lifting platform occupies the space of the side portion and the tail portion of the touring car is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of recreational vehicle auxiliary equipment, in particular to a vehicle loading and unloading auxiliary device for recreational vehicle. BACKGROUND

[0002] With the popularity of recreational vehicle travel, the demand for the convenience of loading and unloading for disabled people or elderly users carrying wheelchairs is increasingly prominent. At present, the commonly used loading and unloading auxiliary method for recreational vehicles mainly includes folding ramps and vehicle-mounted lifting platforms. The folding ramps need to be manually transported and laid, which is labor-intensive, and the safety of wheelchairs is poor when the slope is steep. The traditional vehicle-mounted lifting platforms are mostly installed on the side or tail of the recreational vehicle, which has the problems of large storage space, complex operation, insufficient adaptability and the like.

[0003] However, the traditional lifting platform has many defects in actual use: there is no special wheelchair fixing and transfer structure, the platform guardrails are mostly manually folded, the operation is cumbersome and the locking reliability is low, which cannot guarantee the safety of passengers; at the same time, the device occupies the interior or exterior space of the recreational vehicle after storage, which affects the storage capacity and overall appearance of the recreational vehicle. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a vehicle loading and unloading auxiliary device for recreational vehicle to solve the technical problems of unreliable wheelchair fixing, cumbersome operation of guardrails and large storage space of the traditional vehicle loading and unloading auxiliary device in the prior art.

[0005] The purpose and effect of the vehicle loading and unloading auxiliary device for recreational vehicle of the present application are achieved by the following specific technical means: The present application provides a vehicle loading and unloading auxiliary device for recreational vehicle, which is arranged on the top of the recreational vehicle and corresponds to the upper area of the rear door of the recreational vehicle, and includes a storage bin which is a sealable structure capable of being lifted and opened and closed; A folding crane is arranged in the storage bin, and a support plate is arranged at the movable end of the folding crane; Two groups of winch mechanisms are arranged on the support plate, and a lifting platform is arranged at the end of the steel wire rope of each winch mechanism; The lifting platform can be stored in the storage bin or placed on the ground through the folding crane and the two groups of winch mechanisms; Two groups of guardrails are arranged on both sides of the lifting platform, and each group of guardrails can rotate between a folding posture parallel to the top of the lifting platform and an unfolded posture perpendicular to the surface of the lifting platform; One group of the guardrails and the lifting platform are provided with a slide rail, the slide rail is in L shape, a bearing plate is slidably arranged on the slide rail, the bearing plate can slide between an extended position perpendicular to the inner side of the lifting platform and a retracted position horizontal to the inner side of the lifting platform, and a hook for suspending a wheelchair is arranged on the bearing plate.The bottom of the support plate is provided with three groups of control line barrels, three groups of ropes are wound on the control line barrels, and the ropes on the three groups of control line barrels are connected with the two groups of guardrails and the bearing plate respectively, so as to control the folding and unfolding of the guardrails and the sliding of the bearing plate along the slide rail through the winding and unwinding of the ropes.

[0006] As a preferred mode, the lifting platform is provided with a lap joint at both ends, and the lap joint comprises a driving motor, a connecting plate and a folding plate. The driving motor is installed in the lifting platform, one end of the connecting plate is hinged to the lifting platform, the other end is hinged to the folding plate, and the bottom of the folding plate is hinged to a connecting rod. The connecting plate and the folding plate are rotated by the driving motor through the connecting rod and the driving motor, so as to drive the connecting plate and the folding plate to unfold and fold.

[0007] As a preferred mode, the lifting platform is further provided with two groups of limiting rods which can rotate at both ends, the guardrails are provided with slide tables at both ends, and one end of the limiting rod is slidably connected with the slide table. A clamping groove is formed on the limiting rod, and a clamping block is arranged on the connecting plate. When the guardrail and the connecting plate are in the unfolded state, the clamping block is clamped in the clamping groove to form mechanical locking, thereby limiting the rotation of the guardrail around the hinge point.

[0008] As a preferred mode, the lifting platform is provided with a guide rail, a support table is slidably arranged on the guide rail, a driving member for driving the support table to move along the length direction of the guide rail is arranged in the support table, and a folding seat plate is arranged on the support table.

[0009] As a preferred mode, the bearing plate is provided with four groups of mounting blocks, a buffer rod is arranged on each of the four groups of mounting blocks, a bandage is arranged at the end of the buffer rod away from the mounting block, a tension spring is sleeved on the buffer rod, one end of the tension spring is connected with the mounting block, and the other end is connected with the bandage.

[0010] As a preferred mode, the lifting platform is provided with a damping member, and a return spring is sleeved on the damping member. The movable end of the damping member extends into the slide rail on the lifting platform and is hinged to the bearing plate. When the bearing plate slides along the slide rail from the retracted position to the extended position, the damping member is elongated synchronously under the tension of the bearing plate, the return spring is stretched and generates a reverse restoring force, and the damping member provides a damping resistance for uniform sliding. When the bearing plate slides along the slide rail from the extended position to the retracted position, the return force of the return spring drives the bearing plate to reset, and the damping member buffers the retraction speed.

[0011] As a preferred mode, the folding crane comprises a rotating base and a first telescopic mechanism and a second telescopic mechanism; Wherein, the rotating base is installed in the storage bin, the first telescopic mechanism is rotatably arranged on the top of the rotating base, the movable end of the second telescopic mechanism is provided with a rotating motor, the second telescopic mechanism is rotatably arranged on the movable end of the first telescopic mechanism through the rotating motor, and the support plate is installed on the movable end of the second telescopic mechanism. The turning mechanism is an electric rotary table, which can drive the first telescopic mechanism, the second telescopic mechanism and the lifting platform to rotate 0°-180° in the horizontal direction, and the first telescopic mechanism and the second telescopic mechanism are both electric push rods.

[0012] As a preferred mode, the winding mechanism is a double-coil winding machine, and two groups of the winding mechanism are symmetrically arranged on the support plate, guide frames are arranged on both sides of the support plate, two groups of damping wire drums are arranged on the guide frames, and one end of the rope of the damping wire drum is fixed to the fixed end of the rope of the winding mechanism and the lifting platform.

[0013] As a preferred mode, the control wire drum comprises a drum body and a driving motor, the drum body and the driving motor are both fixed to the bottom of the support plate, and the output end of the driving motor is connected with the drum body. One side of the drum body is provided with a winding frame, a limiting hole is arranged on the winding frame, and a limiting ring is arranged on the rope of the control wire drum.

[0014] As a preferred mode, the storage bin has: A base is installed on the luggage rack or roof rail of the motor home through bolts; A lifting mechanism is a scissor type lifting frame installed on the base; A top cover is connected with the base through the lifting mechanism.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1、The present application cooperates the top storage bin with the folding crane, so that the device can be stored in the area above the corresponding rear door of the motor home, completely solving the problem of the traditional lifting platform occupying the space of the side and tail of the motor home, and improving the space utilization of the device.

[0016] 2. In use, the device can automatically control the folding and unfolding of the guardrail and the sliding of the bearing plate through the control line drum, and realize the stable fixing and transfer of the wheelchair by matching the hooks, buffer rods and binding belt structure on the bearing plate, solve the problem of lack of special wheelchair fixing structure and poor safety of traditional devices, improve the convenience and safety of the device. At the same time, through the linkage locking of the lap joint and the limiting rod, the mechanical locking of the guardrail can be completed without manual operation, avoiding the defects of traditional manual guardrail operation being complicated and locking being unreliable, further ensuring the safety of passengers and improving the practicality of the device for disabled people and elderly users. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the assembly structure diagram of the application; Figure 2 is the internal structure diagram of the storage bin of the application; Figure 3 is the folding and hanging installation structure diagram of the application; Figure 4 is the structure diagram of the folding and hanging of the application; Figure 5 is the structure diagram of the winding mechanism of the application; Figure 6 is the folding diagram of the guardrail of the application; Figure 7 is the unfolding diagram of the guardrail of the application; Figure 8 is Figure 7 is the enlarged view of area a in figure 7; Figure 9 is the unfolding diagram of the lap joint of the application; Figure 10 is Figure 9 is the enlarged view of area b in figure 7; Figure 11 is the structure diagram of the damping piece of the application; Figure 12 is the first structure diagram of the control line drum of the application; Figure 13 is the second structure diagram of the control line drum of the application; Figure 14 is the structure diagram of the clamping groove and clamping block of the application.

[0018] Figure 15 is the structure diagram of the limiting rod of the application; Figure 16 is the unfolded rope connection structure diagram of the application; Figure 17 is the folded rope connection structure diagram of the application; Figure 18This is a schematic diagram of the folding structure of the support plate of the invention.

[0019] In the diagram, the correspondence between component names and their corresponding reference numerals is as follows: 11. Storage compartment; 111. Base; 112. Lifting mechanism; 113. Top cover; 12. Folding hanger; 121. Rotating base; 122. First telescopic mechanism; 123. Second telescopic mechanism; 124. Rotary motor; 13. Support plate; 14. Hoisting mechanism; 15. Lifting platform; 151. Connecting seat; 16. Drive motor; 17. Drive component; 21. Guardrail; 221. Connecting plate; 222. Folding plate; 223. Connecting rod; 23. Limiting rod; 24. Slide table; 25. 26. Guide frame; 26. Slide rail; 26A. Vertical guide rail section; 26B. Horizontal guide rail section; 27. Bearing plate; 28. Hook; 29. ​​Mounting block; 31. Buffer rod; 32. Strap; 33. Tension spring; 41. Damping component; 42. Damping cable spool; 43. Control cable spool; 431. Spool body; 432. Drive motor; 433. Take-up frame; 51. Guide rail; 52. Support platform; 53. Folding seat plate; 54. Limiting hole; 55. Limiting ring; 56. Locking block; 57. Locking groove. Detailed Implementation

[0020] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the technical solutions of the present invention, but should not be used to limit the scope of protection of the present invention.

[0021] Example

[0022] like Figures 1 to 18 As shown, the present invention provides an auxiliary device for getting on and off a motorhome, which is installed on the top of the motorhome and in the area above the rear door of the motorhome, including a storage compartment 11, which is a sealed structure that can be lifted and opened. The storage compartment 11 is equipped with a folding crane 12, and the movable end of the folding crane 12 is equipped with a support plate 13. Two sets of winch mechanisms 14 are provided on the support plate 13. The ends of the wire ropes of the two sets of winches 14 are equipped with lifting platforms 15. The lifting platforms 15 can be stored in the storage compartment 11 or placed on the ground by the folding crane 12 and the two sets of winches 14. Both sides of the lifting platform 15 are equipped with guardrails 21. Both sets of guardrails 21 can rotate between a folded posture parallel to the top of the lifting platform 15 and an unfolded posture perpendicular to the surface of the lifting platform 15. One of the guardrails 21 and the lifting platform 15 has a slide rail 26. The slide rail 26 is L-shaped and a support plate 27 slides on the slide rail 26. The support plate 27 can slide along the slide rail 26 between an extended position perpendicular to the inner side of the lifting platform 15 and a retracted position horizontal to the inner side of the lifting platform 15. The support plate 27 is provided with a hook 28 for hanging a wheelchair. The bottom of the support plate 13 is provided with three groups of control line drums 43, and ropes are wound on the three groups of control line drums 43. The ropes on the three groups of control line drums 43 are connected with the two groups of guardrails 21 and the bearing plate 27 respectively, and are used for controlling the folding and unfolding of the guardrails 21 and the sliding of the bearing plate 27 along the slide rail 26 through the winding and unwinding of the ropes.

[0023] Specifically, the device adopts a top integrated layout, and the core is connected through the hierarchical linkage of the "storage bin 11-folding crane 12-lifting platform 15", realizing space utilization and convenient transfer. The storage bin 11 serves as the installation and protection carrier of the device. The scissor-type lifting mechanism 112 can drive the top cover 113 to open and close. When idle, the lifting platform 15 is stored in the sealed bin in cooperation with the extension and rotation of the folding crane 12 and the winding of the steel wire rope of the winch mechanism 14, avoiding occupying the storage space on the side and tail of the house car, and isolating the erosion of outdoor sand and rain on the components, ensuring long-term stable use of the device.

[0024] In use, the position of the support plate 13 is adjusted through the folding crane 12, and then the lifting platform 15 is uniformly lowered to the ground by the winch mechanism 14, without manual carrying assistance throughout the process. The actions of the guardrails 21 and the bearing plate 27 are synchronously controlled by the three groups of control line drums 43. When the guardrails 21 are unfolded, the control line drums 43 wind the ropes to drive the guardrails 21 to rotate around the hinge points to the vertical posture, and at the same time, the other group of drums drives the bearing plate 27 to slide along the L-shaped slide rail 26, first vertically extending inside the lifting platform 15, and then horizontally connecting to the rear door of the house car or the ground, forming a wheelchair transfer channel.

[0025] It should be noted that the hinge between the guardrails 21 and the lifting platform 15 is hinged by a damping shaft, which provides continuous pre-tightening force to make the guardrails 21 maintain the folded posture in the natural state; limits the rebound speed of the guardrails 21 to ensure that the folding process of the guardrails 21 is slow and stable; at the same time, the ropes of the control line drums 43 can be connected with the guardrails 21 and the bearing plate 43 through buckles. This connection method is a conventional means in the mechanical field, although it is not shown in the figure, but the skilled person in the art can directly adapt based on conventional design; at the same time, the connection method is not limited to buckles, as long as it meets the requirements of firm connection, stable force transmission, convenient disassembly and assembly, and does not interfere with the action of the components.

[0026] The L-shaped slide rail 26 is composed of a vertical guide rail segment 26A arranged inside the guardrail 21 and a horizontal guide rail segment 26B opened at the top of the lifting platform 15. Figure 7 The '26' points to the vertical guide rail segment 26A, and the '26B' points to the horizontal guide rail segment 26B. Figure 9The middle '26' points to the horizontal guide rail section 26B, and the labeling direction is different due to the viewing angle. In fact, it is two parts of the same slide rail. The vertical guide rail section 26A is a folding groove guide rail, and the folding shaft is coaxially arranged with the hinge shaft of the guardrail 21 and the lifting platform 15. When the guardrail 21 is in the folded state, the vertical guide rail section 26A is folded and attached to the top of the lifting platform 15 synchronously with the guardrail 21, without occupying additional space. When the guardrail 21 is unfolded to the vertical state, the vertical guide rail section 26A is rotated to the vertical state synchronously with the guardrail 21, and is connected with the horizontal guide rail section 26B, forming a complete L-shaped sliding path.

[0027] The bottom of the bearing plate 27 is provided with two groups of roller groups adapted to different guide rail sections: a vertical roller group adapted to the vertical guide rail section 26A, and a horizontal roller group adapted to the horizontal guide rail section 26B. The specific logic of the line cylinder driving the sliding of the bearing plate 27 is that the control line cylinder 43 is detachably connected with the hanging ring of the bearing plate 27 through buckling (which is a conventional means in the technical field, not shown in the figure). When the guardrail 21 is unfolded to the vertical state and the two guide rail sections are connected, the control line cylinder 43 retracts the rope to generate a continuous pulling force, which pulls the bearing plate 27 to first extend vertically along the vertical guide rail section 26A inside the lifting platform 15, and then, when the bearing plate 27 reaches the guide rail connection position, the horizontal roller group bears the force and continues to slide horizontally along the horizontal guide rail section 26B, and finally is lapped to the back door of the motor home or the ground, completing the complete sliding trajectory of'vertical extension → horizontal lapping'.

[0028] The hooks 28 on the bearing plate 27 can quickly hook the wheelchair frame, and cooperate with the subsequent buffer rod 31 and the binding belt 32 structure to realize fixation, solving the problem of unstable placement of the traditional device wheelchair. When stored, the control line cylinder 43 is reversely unwound, the damping member 41 and the return spring cooperatively drive the bearing plate 27 to stably retract, the guardrail 21 is synchronously folded and attached to the top of the lifting platform 15, and then the lifting platform 15 is retracted into the warehouse through the winch mechanism 14 and the folding hanger 12, completing the whole action closed loop, taking into account convenience and safety.

[0029] The lifting platform 15 is provided with a lapping piece at both ends, and the lapping piece comprises a driving motor 16, a connecting plate 221 and a folding plate 222. The driving motor 16 is installed in the lifting platform 15, one end of the connecting plate 221 is hinged to the lifting platform 15, and the other end is hinged to the folding plate 222, and the bottom of the folding plate 222 is hinged to the connecting rod 223. The connecting plate 221 and the folding plate 222 are connected to the driving motor 16 through the connecting rod 223, and are rotated by the driving motor 16 to drive the connecting plate 221 and the folding plate 222 to unfold and fold.

[0030] Specifically, the lap joint adopts a folding structure of "motor drive + connecting rod 223 linkage", integrated at both ends of the lifting platform 15, the core function is to fill the gap between the lifting platform 15 and the ground, the RV rear door, while expanding the lifting platform 15 carrying area, improving the stability of the wheelchair and passengers getting on and off the vehicle. The driving motor 16 is embeddedly installed in the reserved cavity inside the lifting platform 15, avoiding exposure to pollution or collision damage, and its output shaft is fixedly connected with one end of the connecting rod 223 to form a power output end point.

[0031] When unfolding, the driving motor 16 rotates forward, driving the connecting rod 223 to rotate around the motor output shaft, and the other end of the connecting rod 223 pulls the hinge point at the bottom of the folding plate 222, causing the folding plate 222 to flip outward around the hinge with the connecting plate 221, and the connecting plate 221 is simultaneously unfolded outward around the hinge point with the lifting platform 15 under the linkage force of the folding plate 222. At this time, the free end of the folding plate 222 is lapped on the ground or the edge of the RV rear door, forming a transition ramp to avoid bumping and jamming when the wheelchair passes through.

[0032] When folding and storing, the driving motor 16 reverses, the connecting rod 223 pushes the folding plate 222 to flip inward, and the folding plate 222 is attached to the surface of the connecting plate 221, and then both are rotated inward around the hinge point of the lifting platform 15, and finally completely stored on the lifting platform 15, without occupying additional space, ensuring that the lifting platform 15 can be smoothly stored in the top storage bin 11. The whole process does not need manual assistance, and the automatic unfolding and folding are realized by motor drive, which adapts to the convenient operation needs of disabled people and the elderly, and the cooperation of the connecting rod 223 and the double hinge structure can adapt to different ground slopes and door heights, improving the adaptability of the device.

[0033] It should be noted that the support plate 13 is provided with a wire reel (not shown in the figure), which can be selected as a JSL-50 type automatic winding wire reel. The power supply end is distributed along the folding boom 12, one end of the wire is connected to the RV power supply, and the other end is connected to the junction box of the lifting platform 15, providing power for the driving motor 16, and adapting to the stable power supply when the lifting platform moves up and down.

[0034] Two groups of limiting rods 23 are also rotatable at both ends of the lifting platform 15, and the guardrails 21 are both provided with sliding tables 24, and one end of the limiting rod 23 is slidingly connected with the sliding table 24. A clamping groove 57 is formed on the limiting rod 23, and a clamping block 56 is arranged on the connecting plate 221. When the guardrails 21 and the connecting plate 221 are both in the unfolded state, the clamping block 56 is clamped in the clamping groove 57, forming a mechanical lock to limit the rotation of the guardrails 21 around the hinge point.

[0035] Specifically, the limiting rods 23, the sliding table 24, the clamping blocks 56 and the clamping grooves 57 constitute a linkage locking mechanism of the guardrails 21 and the lap joint members, which mechanically prevents the guardrails 21 from shaking after being unfolded, improves the safety of the device, and synchronously adapts the locking action with the unfolding of the guardrails 21 and the lap joint members without additional manual operation. The two groups of limiting rods 23 are symmetrically connected to the outer sidewalls at both ends of the lifting table 15 and can freely rotate around the rotating shafts. The sliding protrusions at one end of the limiting rods 23 are embedded in the strip-shaped sliding grooves of the sliding tables 24 at the ends of the guardrails 21. The sliding grooves extend along the height direction of the guardrails 21, so that the limiting rods 23 can synchronously slide with the guardrails 21 during the folding and unfolding of the guardrails 21 without interfering with the basic actions of the guardrails 21.

[0036] When the guardrails 21 are driven to be unfolded to the vertical posture by the control wire drums 43 and the connecting plates 221 of the lap joint members are synchronously unfolded, the clamping blocks 56 on the connecting plates 221 are aligned with the clamping grooves 57 in the middle of the limiting rods 23. At this time, the clamping grooves 57 are clamped on the clamping blocks 56 to form a stable mechanical locking structure that can not only limit the inward and outward rotation of the guardrails 21 around the hinge points but also constrain the upward and downward displacement of the guardrails 21 through the sliding connection between the limiting rods 23 and the sliding tables 24 to avoid the shaking of the guardrails 21 caused by external force collision.

[0037] As shown in FIGS. 1, 2 and 3, the limiting rods 23 are connected to the outer sidewalls at both ends of the lifting table 15 and can freely rotate around the rotating shafts. The sliding protrusions at one end of the limiting rods 23 are embedded in the strip-shaped sliding grooves of the sliding tables 24 at the ends of the guardrails 21. The sliding grooves extend along the height direction of the guardrails 21, so that the limiting rods 23 can synchronously slide with the guardrails 21 during the folding and unfolding of the guardrails 21 without interfering with the basic actions of the guardrails 21. Figure 13 Figure 14 As shown in FIGS. 1, 2 and 3, the limiting rods 23 are connected to the outer sidewalls at both ends of the lifting table 15 and can freely rotate around the rotating shafts. The sliding protrusions at one end of the limiting rods 23 are embedded in the strip-shaped sliding grooves of the sliding tables 24 at the ends of the guardrails 21. The sliding grooves extend along the height direction of the guardrails 21, so that the limiting rods 23 can synchronously slide with the guardrails 21 during the folding and unfolding of the guardrails 21 without interfering with the basic actions of the guardrails 21.

[0038] When the guardrails 21 are driven to be unfolded to the vertical posture by the control wire drums 43 and the connecting plates 221 of the lap joint members are synchronously unfolded, the clamping blocks 56 on the connecting plates 221 are aligned with the clamping grooves 57 in the middle of the limiting rods 23. At this time, the clamping grooves 57 are clamped on the clamping blocks 56 to form a stable mechanical locking structure that can not only limit the inward and outward rotation of the guardrails 21 around the hinge points but also constrain the upward and downward displacement of the guardrails 21 through the sliding connection between the limiting rods 23 and the sliding tables 24 to avoid the shaking of the guardrails 21 caused by external force collision.

[0039] The lifting table 15 is provided with a guide rail 51, and a support table 52 is slidably arranged on the guide rail 51. The support table 52 is provided with a folding seat plate 53.

[0040] ​Specifically, the guide rail 51 is two parallel screw rails embedded in the table top along the length direction of the lifting platform 15, and the support table 52 is provided with sliding blocks matched with the guide rail 51 at the bottom to ensure smooth sliding without jamming. The driving member 17 is preferably a micro linear motor, which is externally arranged on one side of the support table 52, and the output shaft thereof is engaged with the screw rail through a gear set to control the moving stroke of the support table 52. The folding seat plate 53 at the top of the support table 52 is of a split structure hinged by a hinge, and when idle, the seat plate is folded and attached to the side of the support table 52 to save the carrying space of the lifting platform 15; when in use, the seat plate is manually flipped to a horizontal state to cooperate with the position adjustment of the support table 52, so that the wheelchair user can sit on the folding seat plate 53 to fix the wheelchair on the carrying plate 27, which is convenient for the C5 driver to get on the vehicle.

[0041] Specifically, in use, the support table 52 is driven by the remote controller to slide forward along the guide rail 51 to a position close to the carrying plate 27, and the folding seat plate 53 is flipped to a horizontal state. The C5 driver (with perfect upper limbs and disabled lower limbs) can transfer from the wheelchair to the folding seat plate 53 to sit, and then drive the wheelchair into the carrying plate 27 and fix it with the straps 32; then, the lifting platform 15 is lifted as a whole.

[0042] The carrying plate 27 is provided with four groups of mounting blocks 29, and each of the four groups of mounting blocks 29 is provided with a buffer rod 31. The buffer rod 31 is provided with a strap 32 at the end away from the mounting block 29. A tension spring 33 is sleeved on the buffer rod 31, one end of the tension spring 33 is connected with the mounting block 29, and the other end is connected with the strap 32.

[0043] Specifically, the four groups of mounting blocks 29 are distributed in a rectangular shape at the four corners of the carrying plate 27. The buffer rod 31 can be a flexible silica gel bellows that can be stretched, and the fixed end thereof is hinged with the mounting block 29, and the angle thereof can be adjusted to adapt to the frame structure of different models of wheelchairs. The strap 32 is made of high-strength nylon material, and the end thereof is provided with a buckle for winding and fixing the axle or frame of the wheelchair. The tension spring 33 is sleeved outside the buffer rod 31 and remains contracted in the natural state. When the strap 32 is buckled with the wheelchair, the spring generates a reverse tension force with the stretching of the buffer rod 31, which can not only fix the wheelchair on the carrying plate 27, but also buffer the bumps and shaking in the lifting or transfer process, avoid structural damage caused by rigid fixation of the wheelchair, and solve the problem of unstable fixation of the wheelchair in the traditional device.

[0044] The lifting platform 15 is provided with a damping member 41, and a return spring is sleeved on the damping member 41; The movable end of the damping member 41 extends into the sliding rail 26 on the lifting platform 15 and is hinged with the carrying plate 27; When the bearing plate 27 slides along the slide rail 26 from the retracted position to the extended position, the damping member 41 is elongated synchronously by the pulling force of the bearing plate 27, the return spring is stretched and generates a reverse restoring force, and the damping member 41 provides a damping resistance for uniform sliding; When the bearing plate 27 slides along the slide rail 26 from the extended position to the retracted position, the restoring force of the return spring drives the bearing plate 27 to reset, and the damping member 41 buffers the retraction speed.

[0045] Specifically, the damping member 41 is a hydraulic damping telescopic rod, the fixed end of which is installed on the inner side wall of the lifting platform 15 near the slide rail 26 through a support, and the movable end is connected with the hinge seat at the bottom of the bearing plate 27 through a spherical hinge, and the hinge structure can adapt to the angle change of the bearing plate 27 when switching between the horizontal segment and the vertical segment of the L-shaped slide rail 26. The return spring is sleeved outside the damping telescopic rod, and the length of the spring in the free state is adapted to the initial length of the damping member 41, so as to ensure that the spring has no external deformation when the bearing plate 27 is in the retracted position. When the control wire drum 43 drives the bearing plate 27 to slide outward, the damping member 41 moves and elongates with the bearing plate 27, and the sliding inertia is offset through the hydraulic damping effect, so that the bearing plate 27 maintains uniform extension. When recovering, the restoring force of the return spring assists the control wire drum 43 to pull the bearing plate 27, and the damping member 41 buffers the retraction impact force, so as to avoid the collision between the bearing plate 27 and the inner wall of the lifting platform 15 due to the rapid rebound of the bearing plate 27, and to realize the stable and controllable retraction and extension of the bearing plate 27.

[0046] The logic for the damping member 41 to reset the bearing plate 27 is that the bottom of the bearing plate 27 is provided with two groups of rollers, which are horizontal rollers adapted to the horizontal guide rail segment 26B and vertical rollers adapted to the vertical guide rail segment 26A. When the bearing plate 27 is horizontally overlapped, the horizontal rollers are located at the end of the horizontal guide rail segment 26B, and the vertical rollers are on the vertical guide rail segment 26A. At this time, the damping member 41 has been elongated to the maximum stroke by sliding with the bearing plate 27, and the return spring sleeved outside has been fully stretched and stored the reverse restoring force.

[0047] When the bearing plate 27 is retracted, the restoring force of the return spring drives the bearing plate 27 to retract horizontally along the horizontal guide rail segment 26B, and the horizontal rollers roll along the horizontal guide rail segment 26B. At the same time, the vertical rollers move to the connection between the two guide rail segments until the retraction is completed.

[0048] The folding crane 12 comprises a rotating base 121 and a first telescopic mechanism 122 and a second telescopic mechanism 123. The rotating base 121 is installed in the storage bin 11, the first telescopic mechanism 122 is rotatably arranged on the top of the rotating base 121, the second telescopic mechanism 123 is rotatably arranged on the movable end of the first telescopic mechanism 122 through a rotating motor 124, and the support plate 13 is installed on the movable end of the second telescopic mechanism 123. The rotating base 121 is an electric rotating table, which can drive the first telescopic mechanism 122, the second telescopic mechanism 123 and the lifting platform 15 to rotate 0°-180° in the horizontal direction. The first telescopic mechanism 122 and the second telescopic mechanism 123 are both electric push rods.

[0049] Specifically, the rotating base 121 is an electric rotating table, the fixed seat of which is bolted to the bottom plate of the storage bin 11, and the rotating platform is hinged to the bottom of the cylinder of the first telescopic mechanism 122, which can drive the entire folding crane 12 and the lifting platform 15 to realize 0°-180° horizontal rotation, so as to be aligned with the position of the rear door or the driver's cabin of the motor home. The first telescopic mechanism 122 and the second telescopic mechanism 123 are both multi-stage electric push rods, which are arranged vertically. The cylinder of the second telescopic mechanism 123 is connected to the end of the piston rod of the first telescopic mechanism 122 through a rotating motor 124. The rotating motor 124 can drive the second telescopic mechanism 123 to rotate around the axis of the piston rod, so as to switch the direction of extension and contraction. When not in use, the first telescopic mechanism 122 and the second telescopic mechanism 123 are both retracted to the shortest state, so as to fold the lifting platform 15 into the storage bin 11. When in use, the horizontal angle is adjusted through the electric rotating table first, and then the first telescopic mechanism 122 and the second telescopic mechanism 123 are extended in turn, so as to lower the lifting platform 15 to the specified height. The positioning of the lifting platform 15 is completed in cooperation with the winch mechanism 14, so as to meet the use requirements in different parking environments.

[0050] The winch mechanism 14 is a double-coil winch. Two groups of winch mechanisms 14 are symmetrically arranged on the support plate 13. The support plate 13 is provided with guide frames 25 on both sides. The guide frames 25 are provided with two groups of damping wire drums 42. One end of the rope of the damping wire drum 42 is fixed to the fixed end of the rope of the winch mechanism 14 and the lifting platform 15.

[0051] Specifically, the two groups of winch mechanisms 14 are symmetrically installed on the two sides of the top surface of the support plate 13. The steel wire rope is guided by the guide wheels of the guide frames 25 after turning, and then vertically downward, and is fixed to the connecting seats 151 on both sides of the lifting platform 15. The guide frame 25 is a U-shaped steel structure welded to the edges of the support plate 13. The damping wire drum 42 thereon is connected in series with the steel wire rope of the winch mechanism 14. One end of the rope is fixed to the lower end of the steel wire rope of the winch mechanism 14, and the other end is connected to the winding shaft of the damping wire drum 42. When the winch mechanism 14 retracts or extends the steel wire rope to drive the lifting platform 15 to ascend or descend, the damping wire drum 42 can offset the instantaneous tension fluctuation of the steel wire rope through the damping effect of the internal scroll spring, so as to avoid the entanglement and knotting of the steel wire rope caused by uneven stress, and can also reduce the influence of wind on the lifting platform 15, so as to prevent the lifting platform 15 from shaking and improve the stability of the lifting process.

[0052] The control wire drum 43 includes a drum body 431 and a driving motor 432. The drum body 431 and the driving motor 432 are both fixed to the bottom of the support plate 13. The output end of the driving motor 432 is connected to the drum body 431. The cylinder body 431 is provided with a take-up frame 433, and the take-up frame 433 is provided with a limiting hole 54. The control line cylinder 43 is provided with a limiting ring 55.

[0053] As shown in Figure 16 , 17 Specifically, the control line cylinder 43 has three groups, which correspond to the driving control of two groups of guardrails 21 and one group of bearing plates 27. The cylinder body 431 has a closed structure and is internally provided with a rope winding shaft. The driving motor 432 is a servo motor, and the output shaft thereof is coaxially connected with the winding shaft, so that the length of the rope can be controlled. The take-up frame 433 is a stamped metal part welded to the rope outlet side of the cylinder body 431. The limiting hole 54 has a hole diameter slightly larger than the diameter of the rope. After the rope passes through the limiting hole 54, the rope is connected to the driving end of the guardrail 21 or the bearing plate 27. The limiting ring 55 on the rope is a stainless steel ring, and the outer diameter thereof is greater than the hole diameter of the limiting hole 54. When the control line cylinder 43 winds the rope to a preset stroke, the limiting ring 55 abuts against the end face of the limiting hole 54, thereby forming mechanical limiting.

[0054] Specifically, the length of the rope on the bearing plate 27 is longer than that of the rope on the guardrail 21, so as to control the unfolding time of the guardrail 21 and the bearing plate 27, avoid the interference problem that the guardrail 21 is not completely unfolded and locked and the bearing plate 27 is stretched out in advance, and ensure that the action timing is controllable.

[0055] It can be understood that the unfolding actions of the guardrail 21 and the bearing plate 27 are controlled by the length difference of the ropes. The length of the rope corresponding to the bearing plate 27 is longer than that of the rope corresponding to the guardrail 21. After the hoisting mechanism 14 first performs the unwinding and lowers the lifting platform 15 to a specified height (which is the height when the guardrail 21 and the bearing plate 27 are both in the vertical state), the three groups of control line cylinders 43 simultaneously start the winding action. Because the rope of the guardrail 21 is shorter, it is first completely tightened and generates a pulling force, thereby driving the guardrail 21 to rotate around the damping shaft to the vertical posture. Then, the long rope of the bearing plate 27 is gradually tightened, thereby driving the bearing plate 27 to first vertically extend to the inner side of the lifting platform 15 along the L-shaped slide rail 26 and reach the vertical extension state. After both of them are in the vertical state, the three groups of control line cylinders 43 simultaneously stop winding and maintain the rope tension, thereby realizing the stable maintenance of the vertical state of the guardrail 21 and the bearing plate 27, avoiding the posture deviation caused by external force or slight shaking of the lifting platform.

[0056] The storage bin 11 has: a base 111 mounted on the luggage rack or roof rail of the motor home through bolts; a lifting mechanism 112 mounted on the base 111, which is a scissor lifting frame; a top cover 113 connected with the base 111 through the lifting mechanism 112.

[0057] Specifically, the base 111 is a frame structure welded from high-strength aluminum alloy profiles, and the bottom surface is provided with a T-shaped mounting groove adapted to the luggage rack or guide rail of the motor home, and the quick disassembly and position adjustment are achieved through T-shaped bolts. The lifting mechanism 112 is a scissor lifting frame composed of two groups of cross scissor arms, electric push rods and guide rods. The two ends of the scissor arms are hingedly connected to the top surface of the base 111 and the bottom surface of the top cover 113 respectively. The electric push rod drives the scissor arms to expand or contract, thereby achieving the lifting and closing of the top cover 113. The top cover 113 is an arc-shaped streamline structure made of glass fiber reinforced plastic, which has the characteristics of light weight, compression resistance and wind resistance. An annular sealing rubber strip is arranged between the edge of the top cover 113 and the base 111. When stored, the top cover 113 is lowered to close with the base 111 to form a sealed cavity, thereby protecting the core components such as the folding crane 12 and the lifting platform 15 from wind and rain erosion. When in use, the top cover 113 is raised to provide operating space for the extension of the folding crane 12 and the lowering of the lifting platform 15, thereby realizing the integrated protection and storage of the device.

[0058] The device can be operated based on a handheld remote control or a mobile phone control end to achieve full electric operation without manual contact with the core components, thereby meeting the convenient use requirements of groups such as disabled people and the elderly. The specific implementation process is as follows: I. Lowering operation By clicking "lowering start" on the control end, the device automatically completes a series of linkage actions: the top cover 113 of the storage bin 11 is raised and opened, the folding crane 12 is adjusted to a preset position, the hoisting mechanism 14 uniformly releases the wire to lower the lifting platform 15 to the ground; the guardrail 21 is expanded around the damping shaft to a vertical posture, and then the lap joint member is automatically expanded to lap the ground. The guardrail 21 is locked by the clamping block 56 and the clamping groove 57, the bearing plate 27 slides along the L-shaped slide rail 26 to the lapping position, and the lowering is completed. The user can fix the wheelchair on the bearing plate 27 and then start the lifting.

[0059] II. Storage operation After the user gets on the vehicle, clicks the control end "storage start", and each component is automatically reset in reverse order: the bearing plate 27 is retracted and reset under the action of the damping member 41 and the reset spring, and the guardrail 21 is slowly folded and attached to the lifting platform 15 after being unlocked; the lap joint member is folded and stored, the hoisting mechanism 14 is reeled, the folding crane 12 is retracted and rotated, the lifting platform 15 is retracted into the storage bin 11, and finally the top cover 113 is lowered and closed, and the equipment stops working.

[0060] During the whole process, the JSL-50 type automatic winding wire reel along the folding crane 12 provides stable power supply for the driving motor 16, control box and other components; the control box is provided with an overload protection and obstacle detection module, which automatically cuts off power supply and prompts when encountering abnormalities, thereby ensuring safe and convenient operation.

[0061] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A vehicle entry and exit assist device for a motorhome, disposed on the roof of the motorhome and above the rear door, characterized in that: Includes a storage compartment (11), which is a sealed structure that can be lifted and opened; The storage compartment (11) is equipped with a folding crane (12), and the movable end of the folding crane (12) is equipped with a support plate (13). The support plate (13) is equipped with two sets of winch mechanisms (14). The ends of the wire ropes of the two sets of hoisting mechanisms (14) are equipped with lifting platforms (15). The lifting platforms (15) can be stored in the storage compartment (11) or placed on the ground by the folding crane (12) and the two sets of hoisting mechanisms (14). The lifting platform (15) is provided with guardrails (21) on both sides. Both sets of guardrails (21) can rotate between a folded posture parallel to the top of the lifting platform (15) and an unfolded posture perpendicular to the surface of the lifting platform (15). One of the guardrails (21) and the lifting platform (15) have a slide rail (26), the slide rail (26) is L-shaped, and a support plate (27) slides on the slide rail (26). The support plate (27) can slide along the slide rail (26) between an extended position perpendicular to the inner side of the lifting platform (15) and a retracted position horizontal to the inner side of the lifting platform (15). The support plate (27) is provided with a hook (28) for hanging a wheelchair. The bottom of the support plate (13) is provided with three sets of control spools (43), and each set of control spools (43) is wound with a rope. The ropes on the three sets of control spools (43) are respectively connected to the two sets of guardrails (21) and the bearing plate (27), and are used to control the folding and unfolding of the guardrails (21) and the sliding of the bearing plate (27) along the slide rail (26) by the winding and unwinding of the ropes.

2. The RV entry and exit assist device according to claim 1, characterized in that: The lifting platform (15) is equipped with connecting parts at both ends. The connecting parts include a drive motor (16), a connecting plate (221), and a folding plate (222). The drive motor (16) is installed inside the lifting platform (15). One end of the connecting plate (221) is hinged to the lifting platform (15), and the other end is hinged to the folding plate (222). The bottom of the folding plate (222) is hinged to the connecting rod (223). The connecting plate (221) and the folding plate (222) are connected to the drive motor (16) via the connecting rod (223). The drive motor (16) rotates, causing the connecting plate (221) and the folding plate (222) to unfold and fold.

3. The RV entry and exit assist device according to claim 2, characterized in that: The lifting platform (15) has two sets of limiting rods (23) that can rotate at both ends. The guardrail (21) is provided with sliding tables (24) at both ends. One end of the limiting rod (23) is slidably connected to the sliding table (24). The limiting rod (23) has a slot (57) and the connecting plate (221) has a block (56). When the guardrail (21) and the connecting plate (221) are both in the unfolded state, the block (56) is locked in the slot (57) to form a mechanical lock and restrict the guardrail (21) from rotating around the hinge point.

4. The RV entry and exit assist device according to claim 3, characterized in that: The lifting platform (15) is provided with a guide rail (51), and a support platform (52) is slidably mounted on the guide rail (51). The support platform (52) is provided with a driving component (17) for driving the support platform (52) to move along the length direction of the guide rail (51). The support platform (52) is provided with a folding seat plate (53).

5. The RV entry and exit assist device according to claim 4, characterized in that: The support plate (27) is provided with four sets of mounting blocks (29), and each of the four sets of mounting blocks (29) is provided with a buffer rod (31). The buffer rod (31) is provided with a strap (32) at one end away from the mounting block (29). A tension spring (33) is sleeved on the buffer rod (31). One end of the tension spring (33) is connected to the mounting block (29), and the other end is connected to the strap (32).

6. The RV entry and exit assist device according to claim 1, characterized in that: The lifting platform (15) is provided with a damping component (41), and a return spring is sleeved on the damping component (41); The movable end of the damping member (41) extends into the slide rail (26) located on the lifting platform (15) and is hinged to the bearing plate (27); When the bearing plate (27) slides along the slide rail (26) from the retracted position to the extended position, the damping element (41) is stretched synchronously by the tension of the bearing plate (27), the return spring is stretched and generates a reverse restoring force, and the damping element (41) provides damping resistance for uniform sliding. When the support plate (27) slides along the slide rail (26) from the extended position to the retracted position, the restoring force of the reset spring drives the support plate (27) to reset, and the damping element (41) buffers the retraction speed.

7. The RV entry and exit assist device according to claim 6, characterized in that: The folding crane (12) includes a rotating base (121), a first telescopic mechanism (122), and a second telescopic mechanism (123). The rotating base (121) is installed inside the storage compartment (11). The first telescopic mechanism (122) is rotatably mounted on the top of the rotating base (121). The movable end of the second telescopic mechanism (123) is provided with a rotary motor (124). The second telescopic mechanism (123) is rotatably mounted on the movable end of the first telescopic mechanism (122) through the rotary motor (124). The support plate (13) is installed on the movable end of the second telescopic mechanism (123). The rotating base (121) is an electric rotary table, which can drive the first telescopic mechanism (122), the second telescopic mechanism (123) and the lifting platform (15) to rotate 0°-180° in the horizontal direction. The first telescopic mechanism (122) and the second telescopic mechanism (123) are both electric push rods.

8. The RV entry and exit assist device according to claim 7, characterized in that: The winch mechanism (14) is a double coil winch. Two sets of the winch mechanisms (14) are symmetrically arranged on the support plate (13). The support plate (13) is provided with guide frames (25) on both sides. Two sets of damping spools (42) are provided on the guide frames (25). One end of the rope of the damping spool (42) is fixed to the fixed end of the rope of the winch mechanism (14) and the lifting platform (15).

9. The RV entry and exit assist device according to claim 1, characterized in that: The control spool (43) includes a spool body (431) and a drive motor (432). The spool body (431) and the drive motor (432) are both fixed to the bottom of the support plate (13). The output end of the drive motor (432) is connected to the spool body (431). The cylinder (431) is provided with a take-up frame (433) on one side, and a limiting hole (54) is provided on the take-up frame (433). A limiting ring (55) is provided on the rope of the control cylinder (43).

10. A vehicle entry and exit assist device for a motorhome according to claim 1, characterized in that, The storage compartment (11) has the following features: The base (111) is bolted to the luggage rack or roof rail of the RV; The lifting mechanism (112) is a scissor lift frame, which is installed on the base (111); The top cover (113) is connected to the base (111) via the lifting mechanism (112).

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