CN118542785B - An adaptive adjustment mechanism for an intelligent nursing electric wheelchair - Google Patents

Abstract

The invention discloses an adaptive adjusting mechanism for an intelligent nursing electric wheelchair, which comprises 2 supporting frames, follow-up limiting mechanisms and follow-up lifting mechanisms, wherein the front end of each supporting frame is connected with supporting arms in a shaft mode, casters are arranged on the supporting arms, foot pedals are arranged on the supporting arms, the supporting frames are connected with the follow-up limiting mechanisms, the outer side faces of the supporting frames are connected with supporting plates through sliding block sliding chute structures, supporting wheels are arranged on the outer sides of the supporting plates, and driving structures for driving the supporting wheels are further arranged on the supporting plates. The invention can adaptively adjust the height of the seat plate frame and adaptively change the relative position of the seat plate frame, thereby being convenient for a patient to sit on the wheelchair more easily, reducing the burden of the patient or medical staff, reducing obstacles in the process of sitting on the wheelchair by the patient, and further being convenient for the patient to sit on the wheelchair, so that the electric wheelchair is more friendly to the patient.

Description

An adaptive adjustment mechanism for an intelligent nursing electric wheelchair

Technical Field

The present invention relates to the technical field of electric wheelchairs, and in particular to an adaptive adjustment mechanism for an intelligent nursing electric wheelchair.

Background Art

An electric wheelchair is a wheelchair whose wheels are driven by a motor. Compared with the previous manual wheelchair, it does not require the patient to manually crank the wheelchair, which can save the patient's physical strength and help the patient's rehabilitation. The electric wheelchair controls the speed and direction of the wheel rotation and the direction of the wheel through a remote control, so that the wheelchair can be driven flexibly. Half of the remote control of the existing electric wheelchair is installed on the armrest;

The smart nursing electric wheelchair adds medical health data based on the electric wheelchair. For example, some sensors are added to the wheelchair so that the sensors can sense the patient's condition in real time and transmit the data, so as to realize data sharing and realize the online and offline combined diagnosis and treatment ecosystem, which helps doctors understand the patient's condition in real time and facilitates doctors to carry out efficient diagnosis and treatment according to the patient's condition.

Although the existing intelligent nursing electric wheelchair can save patients' physical strength and help them recover compared with the traditional manual wheelchair, there are still some problems when using the existing electric wheelchair, as follows:

1. The existing intelligent nursing electric wheelchair cannot ensure that the patient can sit on the wheelchair easily when in use. The main reason is that compared with healthy people, the patient has certain defects, especially patients with inflexible feet. When patients with inflexible hands and feet sit on the wheelchair with the help of others, they cannot put their feet as close to the wheelchair as healthy people. What often happens is that when the medical staff assists the patient to sit on the wheelchair, the patient's body is close enough to the seat on the wheelchair, but his feet are still a certain distance away from the seat. This means that in this case, if the patient wants to sit on the wheelchair, either the medical staff continues to apply force to make the patient's feet slide on the ground to the side of the seat, or the patient supports himself on the wheelchair with his hands and spends a lot of effort to move his feet to the side of the seat. The reason for this situation is that the height of the seat on the wheelchair is too high. If the height of the seat is low, even if the patient's feet are still a certain distance away from the seat, as long as his buttocks can sit on the seat, most of his body weight will be supported by the wheelchair. It is easier for the medical staff or the patient to move the inflexible feet to the foot pedal on the wheelchair later;

2. When the existing intelligent nursing electric wheelchair is used, although the foot pedal provided thereon can support the patient's feet, it also has a disadvantage, that is, the position of the foot pedal is just set when the patient is sitting on the wheelchair, which makes the foot pedal often hinder the patient from sitting on the wheelchair, which is not conducive to the patient sitting on the wheelchair easily;

Therefore, an adaptive adjustment mechanism for an intelligent nursing electric wheelchair is needed to solve the above problems.

Summary of the invention

The object of the present invention is to provide an adaptive adjustment mechanism for an intelligent nursing electric wheelchair to solve the problem in the above background technology that the seat height of the existing intelligent nursing electric wheelchair is too high and the foot pedals hinder the patient from sitting on the wheelchair.

To achieve the above object, the present invention provides the following technical solutions:

An adaptive adjustment mechanism for an intelligent nursing electric wheelchair comprises a support frame, a follow-up limiting mechanism and a follow-up lifting mechanism, wherein two support frames are provided, and the front end of each support frame is axially connected to a support arm, a caster is installed on the support arm, and a foot pedal is installed on the support arm, the support frame is connected to the follow-up limiting mechanism, and the outer side of the support frame is connected to a support plate through a slider groove structure, a support wheel is installed on the outer side of the support plate, and a driving structure for driving the support wheel is also installed on the support plate, the two support frames are connected to a seat frame through a follow-up lifting mechanism, and the seat frame is connected to a handle.

Furthermore, the follow-up lifting mechanism includes a driven plate, a linkage plate, a support frame, a positioning shaft, a screw, a piston rod, a piston tube, a spring, a connecting column, a positioning tube, an air collecting pipe, an air delivery pipe, a twisted shaft, a worm sleeve and a worm gear sleeve. Two screws are provided, and each screw is threadedly connected to a support frame, the upper ends of the two support frames are connected to the lower surface of the driven plate, and the lower ends of the two support frames are respectively connected to two support frames, the middle part of the screw is keyed to a worm sleeve, and the worm sleeve is connected to the worm gear sleeve, the worm gear sleeve is keyed to the outside of the positioning tube, and the upper end bearing of the positioning tube is connected to the lower end of the air collecting pipe, and the air collecting pipe A protrusion is provided on the top, and the protrusion is slidably connected to the corresponding side of the support frame in the vertical direction. The lower end of the positioning tube is movably sleeved on the outer side of the upper end of the corresponding positioning shaft, and the positioning shaft is fixedly connected to the corresponding support frame. The lower end of the air collecting pipe is penetrated and connected with a twisted shaft. The upper surface of the driven plate is connected to the lower surface of the linkage plate through a connecting column, and piston tubes are evenly distributed on the upper surface of the linkage plate. The upper end of the piston tube movably extends into the lower end of the piston rod, and the upper end of the piston rod is fixedly connected to the lower surface of the seat plate frame, and a spring sleeved on the piston tube and the outside of the piston rod is provided between the lower surface of the seat plate frame and the upper surface of the linkage plate.

By adopting the above technical scheme, the shape of the top frame structure is changed by the rotation of the screw rod, so that the support frame and the driven plate are moved away from or closer to each other. The height of the seat frame can be increased by moving the support frame and the driven plate away from each other, while the height of the seat frame can be lowered by moving the support frame and the driven plate closer to each other. The rotation of the screw rod is subjected to the kinetic energy transmitted by the worm sleeve and the worm gear sleeve, and the positioning tube can be driven to rotate by the twisted shaft while moving and rotating, thereby driving the worm sleeve to rotate synchronously. After the patient's buttocks sit on the seat frame, the gravity of his body is applied to the seat frame, so that the seat frame and the linkage plate are moved closer to each other. In this process, the piston rod moves toward the piston tube, and the spring is compressed, and the piston rod moves into the piston tube, squeezing the gas in the piston tube, so that the gas in the piston tube enters the gas collecting pipe through the gas supply pipe, and then squeezes the twisted shaft to move on the gas collecting pipe. Since the two are threadedly connected by the twisted thread, the twisted shaft will rotate and move, thereby driving the worm sleeve to rotate.

Furthermore, the screw rod is provided with two sections of threads symmetrical about a vertical line, and the two sections of threads of the screw rod are respectively threadedly connected to the two ends of the top support frame, so that when the screw rod rotates, the two ends of the top support frame move away from or towards each other.

By adopting the above technical solution, the two ends of the top support frame connected thereto can be moved closer to or farther away from each other during the rotation of the screw rod.

Furthermore, the structural shape of the top support frame is prismatic, and it is composed of six rotating shafts, four rods and two threaded blocks. The two threaded blocks are respectively threadedly connected to two sections of threads of the screw rod, and the upper and lower ends of the two threaded blocks are connected to a rod through a rotating shaft, and the other ends of the four rods are respectively connected to the lower surface of the corresponding driven plate and the corresponding support frame through the rotating shaft.

By adopting the above technical solution, the top support frame is prism-shaped. During the rotation of the screw rod, the inner angle of the prism changes, so that the upper and lower ends can be closer to or farther away from each other, thereby achieving the purpose of changing the distance between the support frame and the driven plate.

Furthermore, the piston tubes uniformly connected on the linkage plate pass through the interior of the linkage plate, and only the lower ends of two piston tubes are connected to the two gas collecting pipes through the two gas delivery pipes.

By adopting the above technical scheme, it is possible to shorten the distance between the seat frame and the linkage plate and increase the distance of movement of the twist shaft, thereby facilitating the seat frame to move a shorter distance relative to the linkage plate, while the linkage plate and the seat frame as a whole move upward a larger distance, thereby facilitating the patient to sit on the lower seat frame. After sitting on the seat frame, the seat frame can be moved upward so that the patient's feet can be moved to the side of the seat frame, which helps the patient sit on the wheelchair faster and more steadily.

Furthermore, a sliding block is threadedly connected to one end of the screw rod close to the handle, and the sliding block is slidably connected to the support plate in a vertical direction.

By adopting the above technical solution, the sliding block can be driven to move in the horizontal direction through the rotation of the screw rod, and then the support plate can be driven to move. The movement of the support plate can drive the support plate and the components thereon to move, thereby lowering the structure around the seat frame, which helps the patient sit on the seat frame.

Furthermore, the lower end of the piston rod and the upper end of the twisted shaft are both provided with piston plates, and the piston plates on the piston rod and the twisted shaft are seamlessly slidably connected to the inner wall of the piston tube and the inner wall of the gas collecting pipe respectively.

By adopting the above technical solution, the gas can be squeezed by moving the piston plate, thereby achieving the purpose of moving and rotating the twisted shaft.

Furthermore, the lower end of the twisted shaft and the lower end of the air collecting pipe are threadedly connected, and matching twisted threads are arranged between the two. A prismatic block is arranged at the lower end of the twisted shaft, and the prismatic block is movably extended into the prismatic groove at the upper end of the positioning tube, and the structural shapes of the prismatic block and the prismatic groove are consistent with each other.

By adopting the above technical solution, the twisted shaft can be rotated during the movement through the twisted thread, and the positioning tube can be driven to rotate through the prismatic block and the prismatic groove.

Furthermore, the follow-up limiting mechanism includes a limiting plate, a connecting rod and a limiting block, the connecting rod movably passes through the front end of the support frame, and the upper end bearing of the connecting rod is connected to one end of the screw rod, the other end bearing of the connecting rod is connected to the limiting block, and the limiting block is a self-resetting structure.

By adopting the above technical solution, when the screw rod moves in the vertical direction, the connecting rod and the limit block connected thereto can be driven to move upward synchronously, and the rotation of the support arm can be limited by the limit plate.

Furthermore, the structural shape of the limit block is a right-angled triangular prism, and its inclined surface is facing outward in its natural state. The limit block can only rotate in the direction between the two arms, so that after the limit block moves up to overlap with the arm, the arm rotates toward the inside, and after the limit block rotates inwardly to a certain angle, it is reset, and after resetting, the arm is restricted from rotating outward.

By adopting the above technical solution, after the limit block moves up to overlap with the support arm, the support arm rotates inward, and the limit block is restricted from rotating in the opposite direction, so that after the patient sits on the wheelchair, the feet can be stably placed on the foot pedals.

Compared with the prior art, the beneficial effects of the present invention are as follows: the adaptive adjustment mechanism of the intelligent nursing electric wheelchair can adaptively adjust the height of the seat frame and adaptively change the relative position of the seat frame, so that it is easier for patients to sit on the wheelchair, reducing the burden on patients or medical staff, and in addition, it can reduce obstacles in the process of patients sitting on the wheelchair, further facilitating patients to sit on the wheelchair, thereby making the electric wheelchair more patient-friendly:

1. The position of the seat frame is relatively low, and it is easier for the patient to sit on the seat frame. After the patient sits on the seat frame, the gravity of the patient's body causes the linkage plate and the seat frame to move a small distance relative to each other. Although the relative movement distance of the two is small, due to the large amount of gas entering the gas collecting pipe, the follow-up lifting mechanism drives the linkage plate and the seat frame to move upward a large distance as a whole, so that the height of the seat frame can be moved to the height of the seat frame on a normal wheelchair, so that the patient can sit comfortably on the wheelchair. In the process of the linkage plate and the seat frame moving upward as a whole, the patient's inflexible feet are still driven to move to the edge of the seat frame, which helps to assist the patient to sit on the wheelchair stably. When the patient sits on the seat frame, the height of the seat frame is adaptively adjusted, which not only reduces the difficulty of the patient sitting on the wheelchair, thereby reducing the burden on the patient or medical staff, but also improves the comfort of the patient sitting on the wheelchair;

2. The support arm can rotate so that the structure composed of the foot pedal and the caster can move outward, thereby preventing the foot pedal and the caster from causing obstacles to the patient sitting on the wheelchair. In addition, after the patient sits on the wheelchair, the screw rod will move upward, thereby driving the limit block to move upward, so that the limit block and the support arm overlap. Thereafter, the support arm rotates inward and will be limited after passing the limit block, ensuring that the patient's feet can be stably placed on the foot pedal. In the process of the screw rod moving upward and rotating, the support plate will also move forward relative to the seat frame, thereby moving other components around the seat frame forward, so that when no one is sitting in the wheelchair, the distance between other components around the seat frame and the seat frame is relatively far, further reducing the obstacles for the patient to sit on the wheelchair, which is conducive to the patient sitting on the wheelchair more easily.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the main structure of the present invention;

FIG2 is a schematic diagram of the connection structure between the caster and the driven plate of the present invention;

FIG3 is a schematic diagram of the enlarged structure of point A in FIG2 of the present invention;

FIG4 is a schematic diagram of a partial bottom view of the structure of the present invention;

FIG5 is a schematic diagram of the enlarged structure of point B in FIG4 of the present invention;

FIG6 is a schematic diagram of the connection structure between the support frame and the screw rod of the present invention;

FIG. 7 is a schematic diagram of the connection structure of the positioning pipe and the gas collecting pipe of the present invention.

In the figure: 1. support frame; 2. support arm; 3. limit plate; 4. foot pedal; 5. caster; 6. connecting rod; 7. limit block; 8. slider groove structure; 9. support plate; 10. support wheel; 11. driven plate; 12. linkage plate; 13. seat frame; 14. handle; 15. top support frame; 16. positioning shaft; 17. screw rod; 18. piston rod; 19. piston tube; 20. spring; 21. connecting column; 22. positioning tube; 23. gas collecting pipe; 24. gas transmission pipe; 25. twisted shaft; 26. worm sleeve; 27. worm gear sleeve.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Please refer to Figures 1-7, the present invention provides a technical solution:

Embodiment 1: To solve the problem that the electric wheelchair cannot adjust the height adaptively and the patient cannot sit on the wheel easily, the following technical solution is provided. Specifically,

An adaptive adjustment mechanism for an intelligent nursing electric wheelchair comprises a support frame 1, a follow-up limiting mechanism and a follow-up lifting mechanism, wherein two support frames 1 are provided, and a support arm 2 is axially connected to the front end of each support frame 1, and a support plate 9 is connected to the outer side of the support frame 1 through a slider slot structure 8, a support wheel 10 is installed on the outer side of the support plate 9, and a driving structure for driving the support wheel 10 is also installed on the support plate 9, and the two support frames 1 are connected to a seat plate frame 13 through a follow-up lifting mechanism, and the seat plate frame 13 is connected to The handle 14, the follow-up lifting mechanism includes a driven plate 11, a linkage plate 12, a support frame 15, a positioning shaft 16, a screw 17, a piston rod 18, a piston tube 19, a spring 20, a connecting column 21, a positioning tube 22, an air collecting pipe 23, an air delivery pipe 24, a twisted shaft 25, a worm sleeve 26 and a worm gear sleeve 27, two screw rods 17 are provided, and each screw rod 17 is threadedly connected to a support frame 15, the upper ends of the two support frames 15 are connected to the lower surface of the driven plate 11, and the lower ends of the two support frames 15 are connected to the lower surface of the driven plate 11. The ends are respectively connected to the two support frames 1, the middle part of the screw 17 is keyed with a worm sleeve 26, and the worm sleeve 26 is connected to the worm gear sleeve 27, the worm gear sleeve 27 is keyed to the outside of the positioning tube 22, and the upper end bearing of the positioning tube 22 is connected to the lower end of the air collecting pipe 23, and the air collecting pipe 23 is provided with a protrusion, and the protrusion is slidably connected to the corresponding side of the support frame 1 in the vertical direction, the lower end of the positioning tube 22 is movably sleeved on the outer side of the upper end of the corresponding positioning shaft 16, and the positioning shaft 16 is fixedly connected to the corresponding support frame 1. On the frame 1, the lower end of the collecting pipe 23 is connected with a twisted shaft 25, the upper surface of the driven plate 11 is connected to the lower surface of the linkage plate 12 through the connecting column 21, and the upper surface of the linkage plate 12 is evenly distributed with piston tubes 19, the upper end of the piston tube 19 is movably extended into the lower end of the piston rod 18, and the upper end of the piston rod 18 is fixedly connected to the lower surface of the seat frame 13, and a spring 20 is provided between the lower surface of the seat frame 13 and the upper surface of the linkage plate 12, which is sleeved on the outer side of the piston tube 19 and the piston rod 18;

The screw rod 17 is provided with two sections of threads symmetrical about the vertical line, and the two sections of the threads of the screw rod 17 are respectively threadedly connected to the two ends of the support frame 15, so that when the screw rod 17 rotates, the two ends of the support frame 15 move away from or close to each other. The structural shape of the support frame 15 is prismatic, and it is composed of six rotating shafts, four rods and two threaded blocks. The two threaded blocks are respectively threadedly connected to the two sections of the threads of the screw rod 17, and the upper and lower ends of the two threaded blocks are connected to a rod through a rotating shaft. The other ends of the four rods are respectively connected to the lower surface of the corresponding driven plate 11 and the corresponding support frame 1 through the rotating shaft. The piston tubes 19 evenly connected to the linkage plate 12 pass through the interior of the linkage plate 12, and only two piston tubes 19 are connected. The lower end is connected with two gas collecting pipes 23 through two gas delivery pipes 24. A sliding block is also threadedly connected to the end of the screw rod 17 close to the handle 14, and the sliding block is slidably connected to the support plate 9 in the vertical direction. The lower end of the piston rod 18 and the upper end of the twisted shaft 25 are provided with piston plates, and the piston plates on the piston rod 18 and the twisted shaft 25 are seamlessly slidably connected to the inner wall of the piston tube 19 and the inner wall of the gas collecting pipe 23 respectively. The lower end of the twisted shaft 25 is threadedly connected to the lower end of the gas collecting pipe 23, and matching twisted threads are provided between the two. A prismatic block is provided at the lower end of the twisted shaft 25, and the prismatic block movably extends into the prismatic groove at the upper end of the positioning tube 22, and the structural shapes of the prismatic block and the prismatic groove match each other.

When in use, first rotate the support arm 2 to prevent the support arm 2 and the components connected thereto from affecting the patient's sitting on the wheelchair;

Afterwards, the patient or the medical staff helps the patient move to the side of the seat frame 13, the patient's buttocks first contact the seat frame 13, and then sit on the seat frame 13;

After the patient sits on the seat frame 13, the linkage plate 12 and the seat frame 13 are moved closer to each other by their own gravity.

When the linkage plate 12 and the seat frame 13 are approaching each other, the piston plate connected to the piston rod 18 moves into the piston tube 19 connected thereto, thereby squeezing the gas in the piston tube 19, so that the gas in several piston tubes 19 is squeezed into the gas delivery pipe 24 and then into the gas collecting pipe 23;

The gas entering the gas collecting pipe 23 increases the pressure inside the gas, so that the piston plate connected to the twisted shaft 25 moves inside the gas collecting pipe 23, thereby causing the twisted shaft 25 to rotate and move;

When the twist shaft 25 moves, the positioning tube 22 rotates synchronously with the twist shaft 25 through the arrangement of the rhombus-shaped groove and the prism-shaped block;

After the positioning tube 22 rotates, the screw 17 is driven to rotate through the transmission structure composed of the worm sleeve 26 and the worm gear sleeve 27;

After the screw rod 17 rotates, the structural shape of the top support frame 15 is driven to change, so that the driven plate 11 drives the linkage plate 12 and the seat frame 13 to move upward for a longer distance;

During the upward movement of the linkage plate 12 and the seat frame 13, the patient's feet are dragged to move near the footrest 4, so that the patient can sit on the wheelchair more stably.

During the rotation of the screw rod 17 , the support plate 9 is driven to move, so that the support plate 9 and the components connected thereto gradually approach the seat frame 13 , thereby reducing the overall volume of the wheelchair.

Embodiment 2: To solve the problem that the position of the footrest during the use of an electric wheelchair causes obstacles for the patient to sit on the wheelchair, specifically,

A caster 5 is installed on the support arm 2, and a foot pedal 4 is provided on the support arm 2. A follow-up limit mechanism is connected to the support frame 1, and the follow-up limit mechanism includes a limit plate 3, a connecting rod 6 and a limit block 7. The connecting rod 6 movably passes through the front end of the support frame 1, and the upper end bearing of the connecting rod 6 is connected to one end of the screw rod 17, and the other end bearing of the connecting rod 6 is connected to the limit block 7, and the limit block 7 is a self-resetting structure. The structural shape of the limit block 7 is a right-angled triangular prism, and its natural state inclined surface faces outward. The limit block 7 can only rotate in the direction between the two support arms 2, so that the limit block 7 moves up to overlap with the support arm 2, and the support arm 2 rotates toward the inside. After the limit block 7 rotates inward to a moving angle, it is reset. After resetting, the support arm 2 is limited. The arm 2 rotates outward. When in use, since the support arm 2 is rotatable, it can drive the footrest 4 and the caster 5 to rotate outward, reducing the obstacles for the patient to sit on the wheelchair. In the process of the patient sitting on the wheelchair, the screw rod 17 drives the connecting rod 6 and the limit block 7 connected to it to move upward, so that the limit block 7 and the support arm 2 can overlap. After the patient sits on the wheelchair, the support arm 2 rotates inward. After the support arm 2 passes the limit block 7, the position of the support arm 2 is fixed by the limit block 7 and the limit plate 3, thereby facilitating the fixing of the position of the footrest 4 and the caster 5, so as to ensure that the patient's feet are stably placed on the footrest 4. The contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides an electronic wheelchair of intelligent care is with self-adaptation guiding mechanism, includes support frame (1), follow-up stop gear and follow-up elevating system, its characterized in that: the support frame (1) is provided with 2, the front end of each support frame (1) is connected with a support arm (2) through an axle, the support arm (2) is provided with a castor (5), the support arm (2) is provided with a foot pedal (4), the support frame (1) is connected with a follow-up limiting mechanism, the outer side surface of the support frame (1) is connected with a support plate (9) through a sliding block sliding chute structure (8), the outer side of the support plate (9) is provided with a support wheel (10), the support plate (9) is also provided with a driving structure for driving the support wheel (10), The 2 supporting frames (1) are connected with the seat plate frame (13) through a follow-up lifting mechanism, the seat plate frame (13) is connected with a handle piece (14), the follow-up lifting mechanism comprises a driven plate (11), a linkage plate (12), a supporting frame (15), a positioning shaft (16), a screw rod (17), a piston rod (18), a piston tube (19), a spring (20), a connecting column (21), a positioning tube (22), a gas collecting tube (23), a gas transmission tube (24), a twist shaft (25), a worm sleeve (26) and a worm gear sleeve (27), the number of the screw rods (17) is 2, each screw rod (17) is connected with the supporting frame (15) through threads, The upper ends of the 2 supporting frames (15) are connected to the lower surface of the driven plate (11), the lower ends of the 2 supporting frames (15) are respectively connected to the 2 supporting frames (1), the middle part of the screw rod (17) is connected with a worm sleeve (26) in a key manner, the worm sleeve (26) is connected with a worm wheel sleeve (27), the worm wheel sleeve (27) is connected with the outer side of a positioning pipe (22) in a key manner, the upper end of the positioning pipe (22) is connected to the lower end of a gas collecting pipe (23) in a bearing manner, a bulge is arranged on the gas collecting pipe (23) and is connected to the side surface of the corresponding supporting frame (1) in a sliding manner in the vertical direction, the lower end of the positioning pipe (22) is movably sleeved on the outer side of the upper end of the corresponding positioning shaft (16), And the positioning shaft (16) is fixedly connected to the corresponding supporting frame (1), the lower end of the gas collecting tube (23) is connected with a twist shaft (25) in a penetrating way, the upper surface of the driven plate (11) is connected with the lower surface of the linkage plate (12) through a connecting column (21), the upper surface of the linkage plate (12) is uniformly distributed with piston tubes (19), the upper end of the piston tubes (19) movably stretches into the lower end of the piston rods (18), the upper ends of the piston rods (18) are fixedly connected to the lower surface of the seat plate frame (13), springs (20) sleeved outside the piston tubes (19) and the piston rods (18) are arranged between the lower surface of the seat plate frame (13) and the upper surface of the linkage plate (12), The screw rod (17) is provided with two sections of threads symmetrical about a perpendicular to the screw rod (17), the two sections of threads of the screw rod (17) are respectively connected with two ends of the supporting frame (15) in a threaded mode, when the screw rod (17) rotates, the two ends of the supporting frame (15) are far away from each other or move close to each other, the structural shape of the supporting frame (15) is prismatic, the supporting frame is composed of six rotating shafts, four rods and 2 threaded blocks, the 2 threaded blocks are respectively connected onto the two sections of threads of the screw rod (17) in a threaded mode, the upper end and the lower end of the 2 threaded blocks are respectively connected with the 1 rod through the 1 rotating shaft, and the other ends of the four rods are respectively connected onto the lower surface of the corresponding driven plate (11) and the corresponding supporting frame (1) through the rotating shafts.

2. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 1, wherein: the piston tubes (19) uniformly connected to the linkage plate (12) are communicated with the inside of the linkage plate (12), and the lower ends of only 2 piston tubes (19) are communicated with 2 gas collecting tubes (23) through 2 gas conveying tubes (24).

3. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 2, wherein: one end of the screw rod (17) close to the handle piece (14) is also connected with a sliding block in a threaded mode, and the sliding block is connected to the supporting plate (9) in a sliding mode in the vertical direction.

4. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 3, wherein: the lower end of the piston rod (18) and the upper end of the twist shaft (25) are respectively provided with a piston sheet, and the piston sheets on the piston rod (18) and the twist shaft (25) are respectively in seamless sliding connection with the inner wall of the piston tube (19) and the inner wall of the gas collecting tube (23).

5. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 4, wherein: the lower end of the twist shaft (25) and the lower end of the gas collecting tube (23) are in threaded connection, twist threads matched with each other are arranged between the lower end of the twist shaft and the lower end of the gas collecting tube, a prismatic block is arranged at the lower end of the twist shaft (25), the prismatic block movably stretches into a prismatic groove at the upper end of the positioning tube (22), and the structural shapes of the prismatic block and the prismatic groove are mutually matched.

6. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 5, wherein: the follow-up limiting mechanism comprises a limiting piece (3), a connecting rod (6) and a limiting block (7), wherein the connecting rod (6) movably penetrates through the front end of the supporting frame (1), an upper end bearing of the connecting rod (6) is connected to one end of the screw rod (17), the other end bearing of the connecting rod (6) is connected with the limiting block (7), and the limiting block (7) is of a self-resetting structure.

7. The self-adaptive adjusting mechanism for intelligent nursing electric wheelchair according to claim 6, wherein: the structure shape of the limiting block (7) is a right-angle triangular prism, the natural state inclined plane faces to the outer side, the limiting block (7) can only rotate in the direction between the 2 support arms (2), after the limiting block (7) moves upwards to be overlapped with the support arms (2), the support arms (2) rotate towards the inner side, after the limiting block (7) rotates inwards for a moving angle, the limiting block is reset, and after the limiting block is reset, the support arms (2) are limited to rotate outwards.