Intelligent wheelchair storage device for being additionally arranged on chassis of motor home

Abstract

The invention relates to the field of intelligent wheelchairs and motor homes, in particular to an intelligent wheelchair storage device used for being additionally arranged on a motor home chassis. The device comprises a garage, a front fixing frame, a rear fixing frame and two lifting mechanisms. Wherein the front fixing frame and the rear fixing frame are used for being fixedly installed on a motor home chassis, and the garage is used for storing the intelligent wheelchair; the two lifting mechanisms are bilaterally symmetrical about the garage; each lifting mechanism comprises three push rods, the fixed ends of two push rods are hinged to the front fixing frame, and the fixed end of the other push rod is hinged to the rear fixing frame. The telescopic ends of the three push rods are hinged to the same side face, in the left-right direction, of the garage, and the hinged center lines are arranged in a triangular shape. On the premise that no transmission exists, the height space is saved, and the space of the motor home is not occupied, stable lifting of the garage and storage of the intelligent wheelchair can be achieved, the use cost is low, and comfort is high.

Description

Technical Field

[0001] The present invention relates to the field of intelligent wheelchairs and recreational vehicles, and in particular to an intelligent wheelchair storage device for being installed on a chassis of a recreational vehicle. Background Art

[0002] In the past, whether it was an RV or a truck, large objects were usually taken down using a hydraulic tailgate. The tailgate was first laid flat, the goods were transported to the tailgate by a vehicle, and then the tailgate was lowered to the ground so that a slope formed between the tailgate and the ground was formed, so that the vehicle slid down to the ground along the ramp formed by the tailgate, or a ramp was directly connected to the rear of the cargo box to take the goods down along the ramp. The other method was to move the goods down manually. This method would be very troublesome to use on RVs, and would greatly reduce the quality of people's outings, especially for people with low mobility, who could not quickly take their wheelchairs off the RV.

[0003] In order to solve this problem, it is considered to install a lifting mechanism on the RV. However, most of the existing lifting mechanisms are completed by chain drive or belt drive or multi-link, which requires a complex transmission system, high failure rate, and high cost of later repair and maintenance. In addition, this structure occupies a large space, especially in the height direction, which will inevitably greatly invade the RV space, greatly reducing the comfort of the RV. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an intelligent wheelchair storage device for installation on the chassis of an RV. The device can realize stable lifting and lowering of the garage and storage of the intelligent wheelchair without transmission, saving height space and not encroaching on the space of the RV. The device has low use cost and high comfort.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an intelligent wheelchair storage device for installation on the chassis of a motorhome, comprising a garage, a front fixing frame, a rear fixing frame and two lifting mechanisms; wherein,

[0006] The front fixing frame and the rear fixing frame are respectively used for fixing and mounting on the chassis of the RV, and the garage is used for storing the smart wheelchair; the two lifting mechanisms are symmetrical about the garage;

[0007] Each lifting mechanism includes three push rods, wherein the fixed ends of two push rods are hinged to the front fixed frame, and the fixed end of another push rod is hinged to the rear fixed frame; the telescopic ends of the three push rods are respectively hinged to the same side of the garage in the left and right directions, and the hinge center lines are arranged in a triangle.

[0008] To further facilitate confirmation of the extension and retraction speeds of the three push rods, the planes on which the three push rods of each lifting mechanism are located are parallel or overlapped with each other and are perpendicular to the left and right directions.

[0009] A solution is further provided for making the planes of the three push rods parallel or overlap with each other, in each lifting mechanism, the two push rods hinged to the front fixed frame are respectively recorded as the first push rod and the second push rod, and the side of the garage is fixed with a first connecting member and a second connecting member; wherein,

[0010] The distance between the first push rod and the garage in the left-right direction is greater than the distance between the second push rod and the garage in the left-right direction;

[0011] The telescopic end of the first push rod is hinged to the first connecting member, and the telescopic end of the second push rod is hinged to the second connecting member;

[0012] The position where the first connecting member is hinged to the first push rod extends outward in the left-right direction beyond the position where the second connecting member is hinged to the second push rod.

[0013] In order to automatically open and close the garage door, the intelligent wheelchair storage device installed on the RV chassis also includes a door opening drive mechanism. The rear side of the garage is the garage door, and the lower end of the garage door is hinged on the garage; the door opening drive mechanism is arranged between the garage and the garage door, and is used to drive the garage door to flip downward to open the garage door.

[0014] In order to further avoid collision between the garage and the ground, the lifting drive is used to drive the garage down to a preset height from the ground, and the garage door is configured to be able to flip downward to contact the ground when the garage is lowered to a preset height from the bottom surface, thereby forming a slope for the smart wheelchair to leave the garage.

[0015] Furthermore, the front fixing frame and the rear fixing frame respectively include an inverted U-shaped rod and two straight rods; wherein,

[0016] The two ends below the inverted U-shaped rod are respectively fixedly connected to the upper end surfaces of the two beams in the left and right directions of the RV chassis;

[0017] The two straight rods are cross-connected at the center, the two lower ends are respectively fixedly connected to the side surfaces of the two beams in the left and right directions of the RV chassis, and the two upper ends are respectively fixedly connected to the upper ends of the inverted U-shaped rods;

[0018] The push rod is hinged to the cross bar portion of the inverted U-shaped rod.

[0019] In order to further prevent the smart wheelchair from shaking or colliding in the garage, a locking mechanism for locking the smart wheelchair is installed in the garage.

[0020] A specific structure of a locking mechanism is further provided, wherein the locking mechanism is used to lock the wheelchair matching base assembly of the intelligent wheelchair, wherein the wheelchair matching base assembly comprises a bottom plate, a wheelchair mounting portion, and a connecting rod connected between the bottom plate and the wheelchair mounting portion; the locking mechanism comprises a limiter base, a limiter upper cover, and a power mechanism;

[0021] The upper cover of the stopper is tilted and slidably mounted on the base of the stopper, and together with the base of the stopper, a clamping space for clamping the bottom plate is formed;

[0022] When the upper cover of the stopper tilts and slides along the extension direction, the height of the clamping space gradually increases to allow the bottom plate to enter the clamping space; when the upper cover of the stopper tilts and slides along the retraction direction, the height of the clamping space gradually decreases to clamp the bottom plate;

[0023] The upper cover of the limiter is provided with a V-shaped guide portion and a strip-shaped constraint groove, and the V-shaped guide portion is used to guide the connecting rod to enter the strip-shaped constraint groove;

[0024] The power mechanism is arranged between the stopper base and the stopper upper cover, and is used for driving the stopper upper cover to slide.

[0025] After adopting the above technical scheme, the garage is used to store smart wheelchairs. The present invention adopts two lifting mechanisms, which can ensure that the left and right sides of the garage are balanced in force, thereby balanced lifting and lowering. The two ends of the push rods are hinged. Compared with the traditional garage lifting platform, in the folded state, the overall occupied space height is relatively small, and the space utilization rate is high. The installation position of the garage can be set under the bed of the trailer travel RV compartment, that is, on the RV chassis, and will not invade the RV space, which greatly improves the comfort of the RV. In addition, there is no complicated transmission system, which reduces the burden of later repair and maintenance. In addition, each lifting mechanism of this embodiment adopts three push rods, and the connection positions of the three push rods and the garage are arranged in a triangle, which greatly improves the stability of the RV in the folded state and during the extension and retraction process, and will not shake. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the result of the intelligent wheelchair storage device for installation on the chassis of a motorhome according to the present invention;

[0027] Figure 2 It is a structural schematic diagram of the intelligent wheelchair storage device for installation on the chassis of a motorhome of the present invention being installed on the chassis of a motorhome;

[0028] Figure 3 It is a schematic diagram of the internal structure of the intelligent wheelchair storage device for installation on the chassis of a motorhome according to the present invention;

[0029] Figure 4 It is a structural schematic diagram of the locking mechanism of the present invention locking the wheelchair and cooperating with the base assembly;

[0030] Figure 5 It is a structural schematic diagram of the locking mechanism of the present invention;

[0031] In the figure, 1. garage; 11. garage door; 2. front fixing frame; 3. rear fixing frame; 4. RV chassis; 5. push rod; 51. first push rod; 52. second push rod; 53. third push rod; 61. first connecting member; 62. second connecting member; 63. third connecting member; 7. door opening drive mechanism; 8. locking mechanism; 81. limiter base; 82. limiter upper cover; 83. power mechanism; 9. wheelchair matching base assembly; 91. bottom plate; 92. wheelchair mounting part; 93. connecting rod. DETAILED DESCRIPTION

[0032] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0033] Embodiment 1

[0034] like Figures 1 to 5 As shown, a smart wheelchair storage device for installation on a motorhome chassis comprises a garage 1, a front fixing frame 2, a rear fixing frame 3 and two lifting mechanisms; wherein,

[0035] Garage 1 is used to store smart wheelchairs;

[0036] The front fixing frame 2 and the rear fixing frame 3 are respectively used for fixing and mounting on the RV chassis 4, and the garage 1 is used for storing the smart wheelchair; the two lifting mechanisms are symmetrical about the garage 1;

[0037] Each lifting mechanism includes three push rods 5, wherein the fixed ends of two push rods 5 are hinged to the front fixed frame 2, and the fixed end of another push rod 5 is hinged to the rear fixed frame 3; the telescopic ends of the three push rods 5 are respectively hinged to the same side surface of the garage 1 in the left and right directions, and the hinge center lines are arranged in a triangle.

[0038] Specifically, the garage 1 can be smoothly lifted and lowered by cooperating with the push rods 5 of the two driving mechanisms. The present embodiment adopts two lifting mechanisms, which can ensure that the left and right sides of the garage 1 are balanced in force, thereby lifting and lowering in a balanced manner. The two ends of the push rods 5 are both hinged. Compared with the traditional lifting mechanism, in the folded state, the overall occupied space height is relatively small, the space utilization rate is high, and the installation position of the garage 1 can be set under the bed of the trailer travel RV compartment, that is, on the RV chassis 4, and will not invade the RV space, which greatly improves the comfort of the RV; and there is no complex transmission system, which reduces the burden of later repair and maintenance; in addition, each lifting mechanism of the present embodiment adopts three push rods 5, and the connection positions of the three push rods 5 and the garage 1 are arranged in a triangular shape, which greatly improves the stability of the RV in the folded state and the process of extending and retracting, and will not shake.

[0039] In this embodiment, the push rod 5 may be an electric push rod. The RV may be a towable travel RV.

[0040] In this embodiment, the structures of the front fixing frame 2 and the rear fixing frame 3 can be various, as long as they can be fixed on the RV chassis 4. Figure 1 and Figure 2 As shown, the front fixing frame 2 and the rear fixing frame 3 respectively include an inverted U-shaped rod and two straight rods; wherein,

[0041] The two ends below the inverted U-shaped rod are respectively fixedly connected to the upper end surfaces of the two beams in the left and right directions of the RV chassis 4;

[0042] The two straight rods are cross-connected at the center, the two lower ends are respectively fixedly connected to the side surfaces of the two beams in the left and right directions of the RV chassis 4, and the two upper ends are respectively fixedly connected to the upper ends of the inverted U-shaped rods;

[0043] The push rod 5 is hinged to the crossbar portion of the inverted U-shaped rod.

[0044] The front fixing frame 2 and the rear fixing frame 3 of this structure are stable in structure, light in weight and small in size.

[0045] Embodiment 2

[0046] like Figure 1 , Figure 2 and Figure 3 As shown, on the basis of the first embodiment, the planes where the three push rods 5 of each lifting mechanism are located are parallel or overlapped with each other and are perpendicular to the left-right direction.

[0047] Specifically, the two lifting mechanisms in this embodiment have a total of six push rods 5, which are started and stopped at the same time, and the lifting of the garage 1 is achieved through the coordination of speed. The planes where the three push rods 5 of each lifting mechanism are located are parallel or overlapped with each other, and are perpendicular to the left and right directions. In this way, it is convenient to obtain the strokes of the three push rods 5 of a single lifting mechanism, and the ratio of the strokes is used as the speed ratio of the three push rods 5, that is, the three push rods 5 are extended at a uniform speed respectively, so that the garage 1 is tilted down, and the three push rods 5 are retracted at a uniform speed respectively, so that the garage 1 is tilted up. In this way, the smooth lifting and lowering of the garage 1 can be achieved.

[0048] Considering that the first push rod 51 and the second push rod 52 are both hinged to the front fixing frame 2, in order to make the two parallel, a special design of the installation structure is required, and one example is listed below. Figure 1 , Figure 2 and Figure 3 As shown, in each lifting mechanism, the two push rods 5 hinged to the front fixing frame 2 are respectively marked as the first push rod 51 and the second push rod 52, and the push rod 5 hinged to the rear fixing frame 3 is marked as the third push rod 53; the side of the garage 1 is fixed with a first connecting member 61, a second connecting member 62 and a third connecting member 63; wherein,

[0049] The distance between the first push rod 51 and the garage 1 in the left-right direction is greater than the distance between the second push rod 52 and the garage 1 in the left-right direction; the plane where the first push rod 51 is located is parallel to the plane where the second push rod 52 is located, and the plane where the third push rod 53 and the second push rod 52 are located coincident.

[0050] The telescopic end of the first push rod 51 is hinged to the first connecting member 61 , the telescopic end of the second push rod 52 is hinged to the second connecting member 62 ; the telescopic end of the third push rod 53 is hinged to the third connecting member 63 .

[0051] The position where the first connecting member 61 is hinged to the first push rod 51 extends outward in the left-right direction beyond the position where the second connecting member 62 is hinged to the second push rod 52 .

[0052] It should be noted that the hinged member in the figure is fixedly connected to the corresponding connecting member (the first connecting member 61, the second connecting member 62 and the third connecting member 63 are collectively referred to as connecting members), and may be welded. The telescopic end of the push rod 5 is hinged to the corresponding hinged member.

[0053] Embodiment 3

[0054] Based on the first embodiment, Figure 3 As shown, the intelligent wheelchair storage device for installation on the RV chassis also includes a door opening drive mechanism 7. The rear side of the garage 1 is a garage door 11, and the lower end of the garage door 11 is hinged on the garage 1; the door opening drive mechanism 7 is arranged between the garage 1 and the garage door 11, and is used to drive the garage door 11 to flip downward to open the garage door 11.

[0055] In this way, the garage door 11 can be opened and closed automatically, which is convenient and trouble-free. In the present embodiment, the door opening drive mechanism 7 can be, but is not limited to, an electric push rod.

[0056] In the process of driving the garage 1 to descend, the lifting drive drives the garage 1 to descend to a preset height from the ground, and then the garage door 11 is flipped downward and opened by the door opening drive mechanism 7, and contacts the ground to form a slope for the smart wheelchair to leave the garage. In a specific example, the preset height is 5 cm, and the angle between the slope and the ground is 5°.

[0057] In this way, the garage 1 can be prevented from colliding with the ground, and the stroke of the push rod 5 can be shortened.

[0058] Embodiment 4

[0059] On the basis of any one of the embodiments 1 to 3, Figure 3 As shown, a locking mechanism 8 for locking the smart wheelchair is installed in the garage. In this way, the smart wheelchair can be locked to prevent the smart wheelchair from shaking or colliding in the garage 1 during the driving of the RV.

[0060] like Figure 4 and Figure 5 As shown, the locking mechanism 8 is used to lock the wheelchair matching base assembly 9 of the smart wheelchair, and the wheelchair matching base assembly 9 includes a bottom plate 91, a wheelchair mounting portion 92, and a connecting rod 93 connected between the bottom plate 91 and the wheelchair mounting portion 92; the locking mechanism 8 may include, but is not limited to, a limiter base 81, a limiter upper cover 82, and a power mechanism 83;

[0061] The upper cover 82 of the stopper is slidably fitted on the base 81 of the stopper, and together with the base 81 of the stopper, a clamping space for clamping the bottom plate 91 is formed;

[0062] When the upper cover 82 of the stopper tilts and slides along the extension direction, the height of the clamping space gradually increases to allow the bottom plate 91 to enter the clamping space; when the upper cover 82 tilts and slides along the retraction direction, the height of the clamping space gradually decreases to clamp the bottom plate 91;

[0063] The upper cover 82 of the limiter is provided with a V-shaped guide portion and a strip-shaped constraint groove, and the V-shaped guide portion is used to guide the connecting rod 93 to enter the strip-shaped constraint groove;

[0064] The power mechanism 83 is disposed between the stopper base 81 and the stopper upper cover 82 and is used to drive the stopper upper cover 82 to slide.

[0065] Specifically, when the smart wheelchair needs to be stored, the power mechanism 83 first drives the limiter upper cover 82 to slide obliquely along the extension direction. While the limiter upper cover 82 extends forward, the height of the clamping space formed together with the limiter base 81 gradually increases. After the smart wheelchair moves over, the connecting rod 93 of the wheelchair matching base assembly 9 follows the guidance of the V-shaped guide part on the limiter upper cover 82 to enter the strip constraint groove. When the smart wheelchair moves to the end of the strip constraint groove, the limiter upper cover 82 retreats under the triggering of the connecting rod. In this process, the smart wheelchair continues to move with the retreat of the limiter upper cover 82 until the clamping space formed by the limiter upper cover 82 and the limiter base 81 clamps the wheelchair matching base assembly 9. The bottom plate 91 of the wheelchair is thus locked to the base assembly 9. The whole process is simple and reliable. The structure of the whole locking mechanism 8 is also relatively simple, with low cost and easy operation and maintenance. Moreover, since the upper cover 82 of the limiter is first extended forward and then retreats together with the intelligent wheelchair, the present embodiment can well play a damping and stopping role for the wheelchair and the base assembly 9. The stopping distance is relatively long and the stopping process is relatively gentle, which will not cause large vibration and bumping to the wheelchair and the base assembly 9 or even the entire intelligent wheelchair. The locking is achieved while stopping and retreating, and the whole process is rapid and reliable. In addition, in the present embodiment, the upper cover 82 of the limiter adopts inclined sliding, which saves more space and makes the structure of the whole locking mechanism compact.

[0066] In this embodiment, when the power mechanism 83 is a gas spring, when the gas spring is released, the gas spring pushes the limiter upper cover 82 to slide obliquely along the extension direction by extending. When the connecting rod 93 of the wheelchair matching base assembly 9 collides with the end of the strip constraint groove, the gas spring retracts under the action of the collision. During the retraction process, the gas spring can play a good buffering and braking role on the wheelchair matching base assembly 9.

[0067] When the power mechanism 83 is a push rod mechanism, such as an electric hydraulic push rod, a pressure sensor can be configured at the end of the bar constraint groove. When the pressure sensor detects the collision force between the connecting rod 93 and the end of the bar constraint groove, the controller controls the power mechanism 83 to drive the limiter cover 82 to slide in an inclined manner in the retreat direction. A position detection sensor can also be provided. When it is detected that the connecting rod 93 reaches a preset position, the controller controls the power mechanism 83 to drive the limiter cover 82 to start.

[0068] When the garage 1 is lowered into place and the garage door 11 is opened, the intelligent wheelchair involved in the above embodiment can automatically track and automatically drive to the side of the main driving seat.

[0069] In order to implement the tracking algorithm, we installed a camera on the front pedal of the smart wheelchair. The camera is fixed by the camera bracket and can be connected to the camera bracket by a magnetic buckle. The camera bracket is connected to the smart wheelchair and can be connected together by a suction cup. We use the camera to capture the road image in front, then use a filter to remove noise, use edge detection to extract path features, and use the PID control algorithm to adjust the direction of the wheelchair so that it always stays on the correct path without deviation. According to the results of image analysis, the speed and steering angle of the wheelchair are adjusted. The control circuit consists of an STM32F103 microcontroller, which communicates with the main driver's seat through the CAN protocol. In addition, there are image transmission circuits and step-down circuits for processing image information and controlling the wheelchair. The motor drive circuit consists of a DRV8701 driver board, which is connected to the IO port of the STM3F103. Four timers are used to control the motor rotation speed, and the fifth timer is used to obtain encoder data to control the car's travel.

[0070] The following is the specific implementation of the algorithm:

[0071] Use the encoder to connect to the drive motor of the smart wheelchair to obtain the real-time speed of the wheelchair. The real-time speed calculation formula of the wheelchair tracking is as follows:

[0072] V1(t)=V(t)+E(t)*k

[0073] V2(t)=V(t)+E(t)*k

[0074] V3(t)=V(t)-E(t)*k

[0075] V4(t)=V(t)-E(t)*k

[0076] V1(t) represents the expected driving speed of the left front wheel, V2(t) represents the expected driving speed of the left rear wheel, V3(t) represents the driving speed of the right front wheel, V4(t) represents the driving speed of the right rear wheel, V(t) represents the initial driving speed of the small plan, E(t) represents the deviation value, and k represents the amplification factor.

[0077] After the hardware is initialized, the image obtained by the camera consists of 60 rows of data in total. We create a path array to store the path position and convert the color image into a black and white image. The four parts of the RV chassis are black, the drivable road is white, the black pixel is marked as 1, and the white pixel is marked as 2. Use Gaussian filtering to remove noise, and scan the line from the midpoint of the 59th row at the bottom to the 40th column to the left and right. If the pixel difference between two adjacent points is 1, it means that the two points are color jump points.

[0078] After arriving at the destination, the main driver's seat starts the car by pressing a button. Since the smart wheelchair is placed in the garage 1 in the opposite direction, the lifting mechanism lowers the garage 1 to the ground and opens the garage door 11. The garage door 11 will form a 5° angle with the ground to facilitate the smart wheelchair to walk to the ground. When the garage door 11 of the garage 1 is opened and lowered to the ground, the smart wheelchair is started and the hardware is initialized. The main core starts to read the image. At this time, the camera captures the black part of the garage 1. Then the smart wheelchair is started to reverse and starts to scan the line to the left and right from the midpoint of the 59th row at the bottom. When the left and right scanning lines scan a point close to the white point, it is marked as H, and the point to the left of the H point is marked as K. If the pixel difference between the two points is 1, the two points are considered to be color jump points. Since the camera is installed in front of the smart wheelchair, if a jump point appears, it means that the smart wheelchair is completely on the ground at this time and can turn left or right. Since the main driver's seat is on the left, we need the smart wheelchair to turn left along the trailer chassis (RV chassis 4) first. At this time, start scanning left and right from the middle point of the top first row. When the right side scans to a point close to the white point, it is marked as point Q, and the point to the right of point Q is marked as point W. If the pixel difference between these two points is 1, these two points are considered to be color jump points. At this time, the main core starts to drive the motor control circuit to start moving forward for a distance of three meters, and then turns right on the spot. When turning right, scan the line to the right to a point close to the black point, marked as point A, and the point to the right of point A is marked as point W. is point B. If the pixel difference between these two points is 1, then these two points can be considered as jump points. At this time, continue to the right to find a point three pixels away from point B and mark it as point C. If the difference between point C and a pixel point D on its right is 0, it means that point C is on the chassis of the travel trailer (RV chassis 4). At this time, the right boundary coordinate of the first row can be found. At this time, stop turning right and send instructions to the motor control circuit through the CPU to control the intelligent wheelchair to move forward 8 meters. When the wheelchair moves forward 7 meters and is about to reach the main driving position, use PID control to calculate the current output PWM value to slow down and stop the wheelchair.

[0079] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An intelligent wheelchair storage device for installation on a motorhome chassis, characterized in that: It comprises a garage (1), a front fixing frame (2), a rear fixing frame (3) and two lifting mechanisms; wherein: The front fixing frame (2) and the rear fixing frame (3) are respectively used for being fixedly mounted on a motorhome chassis (4); the garage (1) is used for storing an intelligent wheelchair; and the two lifting mechanisms are symmetrical about the garage (1); Each lifting mechanism comprises three push rods (5), wherein the fixed ends of two push rods (5) are hinged to the front fixing frame (2), and the fixed end of another push rod (5) is hinged to the rear fixing frame (3); the telescopic ends of the three push rods (5) are respectively hinged to the same side surface of the garage (1) in the left and right directions, and the hinge center lines are arranged in a triangular shape.

2. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 1, characterized in that: The planes on which the three push rods (5) of each lifting mechanism are located are parallel to or overlap each other and are perpendicular to the left-right direction.

3. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 2 is characterized in that: In each lifting mechanism, two push rods (5) hinged to the front fixed frame (2) are respectively denoted as a first push rod (51) and a second push rod (52), and a first connecting member (61) and a second connecting member (62) are fixed to the side of the garage (1); wherein, The distance between the first push rod (51) and the garage (1) in the left-right direction is greater than the distance between the second push rod (52) and the garage (1) in the left-right direction; The telescopic end of the first push rod (51) is hinged to the first connecting member (61), and the telescopic end of the second push rod (52) is hinged to the second connecting member (62); The position where the first connecting member (61) is hinged to the first push rod (51) extends outward in the left-right direction beyond the position where the second connecting member (62) is hinged to the second push rod (52).

4. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 1, characterized in that: The invention also comprises a door opening drive mechanism (7), wherein the rear side of the garage (1) is a garage door (11), and the lower end of the garage door (11) is hinged on the garage (1); the door opening drive mechanism (7) is arranged between the garage (1) and the garage door (11), and is used to drive the garage door (11) to flip downward to open the garage door (11).

5. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 4 is characterized in that: The lifting drive is used to drive the garage (1) to descend to a preset height from the ground, and the garage door (11) is configured to be able to flip downward to contact the ground when the garage (1) descends to a preset height from the bottom surface, thereby forming a slope for the intelligent wheelchair to leave the garage.

6. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 1, characterized in that: The front fixing frame (2) and the rear fixing frame (3) respectively comprise an inverted U-shaped rod and two straight rods; wherein, The two ends below the inverted U-shaped rod are respectively fixedly connected to the upper end surfaces of two beams in the left and right directions of the RV chassis (4); The two straight rods are cross-connected at the center, the two lower ends are respectively fixedly connected to the side surfaces of the two beams in the left and right directions of the RV chassis (4), and the two upper ends are respectively fixedly connected to the upper ends of the inverted U-shaped rods; The push rod (5) is hinged to the cross bar portion of the inverted U-shaped rod.

7. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 1, characterized in that: A locking mechanism (8) for locking the intelligent wheelchair is installed in the garage.

8. The intelligent wheelchair storage device for installation on a motorhome chassis according to claim 7, characterized in that: The locking mechanism (8) is used to lock the wheelchair matching base assembly (9) of the intelligent wheelchair, wherein the wheelchair matching base assembly (9) comprises a base plate (91), a wheelchair mounting portion (92), and a connecting rod (93) connected between the base plate (91) and the wheelchair mounting portion (92); the locking mechanism (8) comprises a stopper base (81), a stopper upper cover (82), and a power mechanism (83); The stopper upper cover (82) is tilted and slidably mounted on the stopper base (81), and together with the stopper base (81) forms a clamping space for clamping the bottom plate (91); When the upper cover (82) of the stopper tilts and slides along the extension direction, the height of the clamping space gradually increases to allow the bottom plate (91) to enter the clamping space; when the upper cover (82) of the stopper tilts and slides along the retraction direction, the height of the clamping space gradually decreases to clamp the bottom plate (91); The upper cover (82) of the limiter is provided with a V-shaped guide portion and a strip-shaped constraint groove, wherein the V-shaped guide portion is used to guide the connecting rod (93) to enter the strip-shaped constraint groove; The power mechanism (83) is arranged between the stopper base (81) and the stopper upper cover (82) and is used to drive the stopper upper cover (82) to slide.

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