CN118873342A - A rehabilitation nursing wheelchair - Google Patents

Abstract

The invention discloses a rehabilitation nursing wheelchair, in particular to the technical field of medical equipment, which comprises a rehabilitation wheelchair, wherein a mounting plate is arranged at the lower part of the rehabilitation wheelchair, a driving motor and a storage battery pack for supplying power to the driving motor are fixed at the rear side of the bottom surface of an inner cavity of the mounting plate, two adjustable telescopic rods are symmetrically fixed at the middle part of the bottom surface of the inner cavity of the mounting plate, massage devices are arranged at the output ends of the two adjustable telescopic rods, a first connecting rod is rotatably arranged at one side surface, which is close to the output ends of the two adjustable telescopic rods, and a transmission device is arranged at the middle part of the bottom surface of the inner cavity of the mounting plate. The wheelchair for rehabilitation and nursing provided by the invention adopts the design of the massage device, so that the wheelchair is prevented from injuring a patient again, and is also suitable for patients with serious injuries.

Description

A rehabilitation nursing wheelchair

Technical Field

The present invention relates to the technical field of medical equipment, and in particular to a rehabilitation and nursing wheelchair.

Background Art

In the field of medical devices, wheelchairs are a means of transportation for patients with lower limb paraplegia or the elderly and infirm who cannot walk with their legs. At the same time, for many elderly people and hemiplegic patients, wheelchairs are an indispensable medical device for their daily transportation.

Chinese patent document CN112972137B discloses a rehabilitation training wheelchair, including a back rod, a frame, an armrest, a linkage mechanism, a stretching member, a pedal and a pedaling mechanism, the back rod is welded to the rear side of the frame, the lower end of the back rod is rotatably connected to a rotating shaft, both ends of the rotating shaft are fixedly connected to driving wheels, the middle of the rotating shaft is fixedly connected to a first sprocket, a universal wheel is arranged at the lower end of the front side of the frame, the pedal is fixedly connected to the lower end of the front side of the frame, the pedaling mechanism is arranged on both sides of the pedal, the linkage mechanism is arranged at the front side inside the frame, the linkage mechanism is connected to the pedaling mechanism, the linkage mechanism is connected to the first sprocket, one end of the armrest is fixedly connected to the back rod, and the other end of the armrest is fixedly connected to the frame, and there are two stretching members, which are respectively arranged at the two ends of the front side of the frame; the problem that the wheelchair capable of rehabilitation training in the prior art is relatively complex in structure, resulting in high cost, and the patient cannot complete rehabilitation training independently in the wheelchair.

However, if the patient directly steps on the pedals when the wheelchair is in use, the patient's injuries may be easily further injured due to the lack of a buffer mechanism. At the same time, since the patient needs to step on the pedals to exercise, the wheelchair cannot be used for exercise for patients with more serious injuries when in use.

Summary of the invention

The main purpose of the present invention is to provide a rehabilitation nursing wheelchair, which can effectively solve the problem that the wheelchair is easy to cause further harm to the patient's injuries when in use and cannot exercise patients with more serious injuries.

To achieve the above object, the technical solution adopted by the present invention is:

A rehabilitation and nursing wheelchair comprises a rehabilitation wheelchair, wherein a mounting plate is installed at the lower part of the rehabilitation wheelchair, a driving motor and a battery pack for powering the driving motor are fixed to the rear side of the bottom surface of the inner cavity of the mounting plate, two adjustable telescopic rods are symmetrically fixed to the middle part of the bottom surface of the inner cavity of the mounting plate, the output ends of the two adjustable telescopic rods are both provided with massage devices, a first connecting rod is rotatably installed on the side surfaces where the output ends of the two adjustable telescopic rods are close to each other, a first friction wheel is commonly fixed to the ends of the two first connecting rods close to each other, and a transmission device is provided in the middle part of the bottom surface of the inner cavity of the mounting plate.

Preferably, the massage device includes a slider that slides on the bottom surface of the inner cavity of the mounting plate and is fixedly connected to the output end of the adjustable telescopic rod, the upper end of the slider is fixed with a first support frame, the end of the first support frame away from the slider is fixed with a first mounting box, two first rotating rods connected by belts are rotatably installed in the inner cavity of the first mounting box, cams are fixedly installed on the outer surfaces of the two first rotating rods, a sliding plate is slidably installed in the inner cavity of the first mounting box, two support blocks that penetrate the first mounting box are slidably installed on the end of the sliding plate close to the cam, a through groove that is compatible with the support block is opened in the inner cavity of the first mounting box, and a massage plate located outside the first mounting box is fixedly installed at one end of the two support blocks away from the cam, a buffer spring is fixed between the massage plate and the sliding plate, and a first reset spring is fixed between the sliding plate and a side of the inner cavity of the first mounting box away from the massage plate.

Preferably, a tensioner is fixed to the upper end of the slider, and a transmission belt is wound around any one of the first rotating rods, the tensioner, and the first connecting rod.

Preferably, the support block also penetrates the sliding plate toward a side away from the cam.

Preferably, the outer surface of the cam is always in contact with a side of the sliding plate away from the massage plate.

Preferably, when the first return spring is in a natural state, the buffer spring is in a natural state.

Preferably, the transmission device includes a second mounting box fixed to the bottom surface of the inner cavity of the mounting plate, and the first friction wheel is located in the second mounting box, a second connecting rod parallel to the first connecting rod is provided in the inner cavity of the second mounting box, and the second connecting rod is connected to the driving motor through a belt, a second friction wheel matched with the first friction wheel is fixed on the outer surface of the second connecting rod, two first through grooves matched with the first connecting rod are provided on the outer surface of the second mounting box, a second through groove parallel to the first through groove is symmetrically provided on the upper part of the outer surface of the second mounting box, a second rotating rod is movably installed in the inner cavity of the second through groove, a third friction wheel matched with the second friction wheel is fixed on the outer surface of the second rotating rod, and a limiting mechanism is provided on the top surface of the inner cavity of the second mounting box.

Preferably, the mounting bracket includes a mounting bracket rotatably connected to the second rotating rod, a support plate slidably connected to the top surface of the inner cavity of the second mounting box is fixed at one end of the mounting bracket away from the second rotating rod, a second return spring is fixed between one end of the support plate away from the mounting bracket and a side surface of the inner cavity of the second mounting box close to the driving motor, a mounting groove is provided at the upper end of the support plate, a third return spring is fixed to the right side surface of the inner cavity of the mounting groove, a guide rod sliding in the mounting groove is fixed to the left end of the third return spring, and a C-shaped groove matching the guide rod is provided at the upper end of the second mounting box.

Preferably, when the third return spring and the second return spring are both in a natural state, the third friction wheel is in contact with the second friction wheel.

Compared with the prior art, the present invention has the following beneficial effects:

1. The present invention adopts the design of a massage device. Through the design of the cooperation between the sliding plate and the buffer spring, when the sliding plate moves toward the patient's legs, the buffer spring can buffer the force of the sliding plate moving, which can prevent the massage plate from directly pushing the patient's legs to move, thereby causing further harm to the patient. At the same time, it can also be suitable for patients with more serious injuries. In addition, the design of the cooperation between the massage plate and the sliding plate can massage the patient's legs to speed up the patient's recovery.

2. The present invention adopts a design in which the massage device and the transmission device cooperate with each other. Through the cooperation between the second friction wheel, the third friction wheel and the first friction wheel, the wheelchair can only massage the patient, exercise the patient's arms and legs, or only move the wheelchair when in use, so that the working state of the wheelchair can be adjusted according to different usage environments when in use.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG2 is a partial schematic diagram of the mechanism of the device of the present invention;

FIG3 is a second schematic diagram of a partial structure of the device of the present invention;

FIG4 is a schematic structural diagram of a massage device according to the present invention;

FIG5 is a partial structural schematic diagram of the massage device of the present invention;

FIG6 is a schematic structural diagram of the first friction wheel and the second friction wheel of the present invention when in contact;

FIG7 is a schematic structural diagram of the first friction wheel of the present invention when the first friction wheel is not in contact with the second friction wheel;

FIG8 is a schematic structural diagram of a transmission device of the present invention;

FIG9 is a partial structural schematic diagram of a transmission device of the present invention;

FIG. 10 is an enlarged view of point A in FIG. 9 of the present invention.

In the figure: 1. rehabilitation wheelchair; 2. massage device; 3. transmission device; 11. mounting plate; 12. drive motor; 13. battery pack; 14. adjustable telescopic rod; 15. first connecting rod; 16. first friction wheel; 21. slider; 22. first support frame; 23. first mounting box; 24. first rotating rod; 25. cam; 26. sliding plate; 27. support block; 28. massage plate; 29. buffer spring; 291. first return spring; 31. second mounting box; 32. second connecting rod; 33. second friction wheel; 34. first through groove; 35. second through groove; 36. second rotating rod; 37. third friction wheel; 38. limiting mechanism; 381. mounting bracket; 382. support plate; 383. second return spring; 384. mounting groove; 385. third return spring; 386. guide rod; 387. C-shaped groove.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

Embodiment 1

As shown in Figures 1 to 3, a rehabilitation nursing wheelchair comprises a rehabilitation wheelchair 1. The rehabilitation wheelchair 1 is a prior art. A mounting plate 11 is installed at the lower part of the rehabilitation wheelchair 1. As shown in Figure 2, a driving motor 12 and a battery pack 13 for powering the driving motor 12 are fixed to the rear side of the bottom surface of the inner cavity of the mounting plate 11. The driving motor 12 and the battery pack 13 are both prior art. Their mounting and control methods are conventional designs in the prior art, so the present invention will not repeat them. Two adjustable telescopic rods 14 are symmetrically fixed to the middle of the bottom surface of the inner cavity of the mounting plate 11. The output ends of the two adjustable telescopic rods 14 are both A massage device 2 is provided, which is used to massage the patient's legs to facilitate the patient's recovery. As shown in Figure 3, the first connecting rod 15 is rotatably installed on the side where the output ends of the two adjustable telescopic rods 14 are close to each other, and the first friction wheel 16 is commonly fixed at the ends of the two first connecting rods 15 close to each other. The first friction wheel 16 is further connected to the two first connecting rods 15, so that the output end of the adjustable telescopic rod 14 can drive the first friction wheel 16 to move horizontally when it is extended or retracted. A transmission device 3 is provided in the middle of the bottom surface of the inner cavity of the mounting plate 11.

As shown in Figures 2 to 5, the massage device 2 includes a slider 21 that slides on the bottom surface of the inner cavity of the mounting plate 11 and is fixedly connected to the output end of the adjustable telescopic rod 14. The slider 21 is fixedly connected to the output end of the adjustable telescopic rod 14, so that the adjustable telescopic rod 14 can drive the massage device 2 to move forward or backward in the horizontal direction when extending or contracting. A first support frame 22 is fixed to the upper end of the slider 21, and a first mounting box 23 is fixed to the end of the first support frame 22 away from the slider 21. The first support frame 22 is used for the installation of the first mounting box 23, and it also facilitates the massage device 2 to massage the patient's legs. Two first rotating rods 24 connected by belts are rotatably installed in the inner cavity of the first mounting box 23. The two first rotating rods 24 are connected by belts so that the two first rotating rods 24 can rotate simultaneously, and cams 25 are fixedly installed on the outer surfaces of the two first rotating rods 24.

In addition, as shown in Figure 2, a tensioner is fixed to the upper end of the slider 21, and a transmission belt is commonly wound between any one of the first rotating rods 24 and the tensioner and the first connecting rod 15. The tensioner can keep the belt between the first mounting box 23 and the first connecting rod 15 in a taut state at all times, and further enables the first rotating rod 24 to rotate when the first connecting rod 15 rotates. At the same time, since the two first rotating rods 24 are connected by a belt, the two first rotating rods 24 can both rotate. A sliding plate 26 is slidably installed in the inner cavity of the first mounting box 23, and two support blocks 27 that penetrate the first mounting box 23 are slidably installed on one end of the sliding plate 26 close to the cam 25, and the support block 27 also penetrates the sliding plate 26 to the side away from the cam 25. A through groove that is compatible with the support block 27 is opened in the inner cavity of the first mounting box 23, and a massage plate 28 located outside the first mounting box 23 is commonly fixedly installed on the ends of the two support blocks 27 away from the cam 25.

Among them, the massage plate 28 is used to contact the patient's legs, so that the massage plate 28 can massage the patient's legs when vibrating or moving. A buffer spring 29 is fixed between the massage plate 28 and the sliding plate 26. The buffer spring 29 mainly plays a buffering role, so that when the sliding plate 26 moves toward the patient's legs, if the patient's legs contact the massage plate 28, the buffer spring 29 is compressed, thereby buffering the force of the sliding plate 26 moving toward the patient's legs, preventing the massage plate 28 from directly pushing the patient's legs to move when the sliding plate 26 moves toward the patient's legs. If the patient's leg injury is serious, it is easy to cause further injury to the patient's legs.

In addition, a first return spring 291 is fixed between the sliding plate 26 and a side of the inner cavity of the first mounting box 23 away from the massage plate 28. When the first return spring 291 is in a natural state, the buffer spring 29 is in a natural state. The first return spring 291 is used to facilitate the resetting of the sliding plate 26. At the same time, it also makes the side of the sliding plate 26 away from the massage plate 28 always in contact with the outer surface of the cam 25. Further, when the first rotating rod 24 drives the cam 25 to rotate, the sliding plate 26 can reciprocate toward the side close to the massage plate 28 or the side away from the massage plate 28, thereby massaging the patient's legs to speed up the patient's recovery.

The specific implementation of this embodiment is as follows: when the device is in use, the nursing staff first helps the patient sit on the rehabilitation wheelchair 1, and then adjusts the adjustable telescopic rod 14 to move the massage device 2 closer to the patient's legs, and then the massage plate 28 moves with the patient's legs. When the first connecting rod 15 rotates, the first rotating rod 24 can be driven to rotate through the transmission belt. At the same time, since the two first rotating rods 24 are connected by a belt, the two cams 25 can also rotate at the same time. When the cam 25 rotates, the outer surface of the cam 25 is always in contact with the side of the sliding plate 26 away from the massage plate 28. Due to the design of the first return spring 291, the sliding plate 26 reciprocates toward the side close to the patient's legs or away from the patient's legs.

When the sliding plate 26 moves toward the patient's legs, if the patient's legs are not in contact with the massage plate 28, the sliding plate 26 will drive the massage plate 28 to move toward one side of the patient's legs and contact the patient's legs. When the massage plate 28 contacts the patient's legs and the sliding plate 26 continues to move toward the side close to the patient's legs, due to the design of the buffer spring 29, the massage plate 28 will only apply a small force to the patient's legs. As the buffer spring 29 is compressed, the force applied by the massage plate 28 to the patient's legs becomes greater and greater, thereby massaging the patient's legs. Due to the design of the first return spring 291, the sliding plate 26 can reciprocate in the inner cavity of the first mounting box 23, thereby achieving the purpose of massaging the patient's legs all the time.

Embodiment 2

This embodiment further improves the transmission device 3 on the basis of the first embodiment, so that the wheelchair can be suitable for different working environments when in use.

As shown in FIGS. 6 and 7 , the transmission device 3 includes a second mounting box 31 fixed to the bottom surface of the inner cavity of the mounting plate 11, and the first friction wheel 16 is located in the second mounting box 31. The inner cavity of the second mounting box 31 is provided with a second connecting rod 32 parallel to the first connecting rod 15, and the second connecting rod 32 is connected to the driving motor 12 through a belt. The second connecting rod 32 is connected to the driving motor 12 through a belt, so that the driving motor 12 can drive the second connecting rod 32 to rotate when rotating, and the outer surface of the second connecting rod 32 is fixedly adapted to the first friction wheel 16. The second friction wheel 33 cooperates with the first friction wheel 16, so that the first friction wheel 16 is in contact with the second connecting rod 32 and the second connecting rod 32 can drive the first connecting rod 15 to rotate when it rotates. At the same time, due to the design of the first connecting rod 15 and the first rotating rod 24 being connected by a belt, the first rotating rod 24 is further rotated (that is, when the first friction wheel 16 is in contact with the second connecting rod 32 and the second connecting rod 32 is rotating, the driving motor 12 can provide power for the massage device 2).

In addition, as shown in FIG8 , the outer surface of the second mounting box 31 is provided with two first through grooves 34 adapted to the first connecting rod 15. Since the first connecting rod 15 is fixedly connected to the output end of the adjustable telescopic rod 14, and the output end of the adjustable telescopic rod 14 needs to be extended or retracted to control whether the first friction wheel 16 is in contact with the second connecting rod 32, it is necessary to provide the first through groove 34 to facilitate the sliding of the first connecting rod 15. The upper portion of the outer surface of the second mounting box 31 is symmetrically provided with second through grooves 35 parallel to the first through grooves 34. The second through grooves 35 are parallel to the first through grooves 34. The second rotating rod 36 is movably installed in the inner cavity, and the third friction wheel 37 matched with the second friction wheel 33 is fixed on the outer surface of the second rotating rod 36. When the second friction wheel 33 contacts the third friction wheel 37 and the second friction wheel 33 rotates, the third friction wheel 37 can be driven to rotate. The third friction wheel 37 is connected to the two wheels of the rehabilitation wheelchair 1 through a belt, so that the third friction wheel 37 can drive the two wheels of the rehabilitation wheelchair 1 to rotate when rotating. A limiting mechanism 38 is provided on the top surface of the inner cavity of the second installation box 31.

As shown in Figures 9 and 10, the mounting bracket 381 includes a mounting bracket 381 rotatably connected to the second rotating rod 36, and the end of the mounting bracket 381 away from the second rotating rod 36 is fixed with a support plate 382 slidably connected to the top surface of the inner cavity of the second mounting box 31. The support plate 382 is slidably connected to the second mounting box 31, so that the second rotating rod 36 can move forward and backward, and a second return spring 383 is fixed between the end of the support plate 382 away from the mounting bracket 381 and a side surface of the inner cavity of the second mounting box 31 close to the drive motor 12. The spring 383 is used for resetting the second rotating rod 36, so that the third friction wheel 37 can contact the second friction wheel 33 when the second resetting spring 383 is not subjected to other external forces. A mounting groove 384 is provided at the upper end of the support plate 382, and a third resetting spring 385 is fixed to the right side surface of the inner cavity of the mounting groove 384. A guide rod 386 sliding in the mounting groove 384 is fixed to the left end of the third resetting spring 385. A C-shaped groove 387 adapted to the guide rod 386 is provided at the upper end of the second mounting box 31, and the C-shaped groove 387 is used to limit the guide rod 386.

As shown in Figure 9, when the third return spring 385 and the second return spring 383 are both in the natural state, the third friction wheel 37 contacts the second friction wheel 33. When the guide rod 386 is located in the shorter groove of the C-shaped groove 387, due to the design of the third return spring 385, the guide rod 386 will no longer enter the longer groove of the C-shaped groove 387, and further the shorter groove of the C-shaped groove 387 limits the guide rod 386. Since the second friction wheel 33 and the third friction wheel 37 rub against each other, the second friction wheel 33 will give the mounting bracket 381 a force to move toward the side close to the second return spring 383 when rotating. If the mounting bracket 381 is not limited, the second friction wheel 33 will not necessarily drive the third friction wheel 37 to rotate when the device is in use, thereby affecting the normal operation of the device.

The specific implementation of this embodiment is as follows: when the device is in use, the guide rod 386 is first moved to make the guide rod 386 slide in the installation groove 384, and at the same time slide from the shorter groove of the C-shaped groove 387 to the longer groove, and then the third friction wheel 37 is controlled to contact with the second friction wheel 33 by sliding the guide rod 386, and then the guide rod 386 is limited by entering the shorter groove of the C-shaped groove 387. When the third friction wheel 37 contacts with the second friction wheel 33, the second friction wheel 33 can drive the third friction wheel 37 to rotate, and further, the driving motor 12 can drive the two wheels of the rehabilitation wheelchair 1 to rotate through the friction between the third friction wheel 37 and the second friction wheel 33 when rotating, so that the wheelchair can move;

When the second friction wheel 33 is not in contact with the third friction wheel 37, the second friction wheel 33 cannot drive the wheelchair to move when it rotates. At the same time, if the second mounting box 31 is in contact with the second friction wheel 33, the wheelchair can massage the patient's legs without moving. At the same time, when the patient moves the wheelchair by turning the wheels of the rehabilitation wheelchair 1, the massage device 2 can also massage the patient's legs, so that the wheelchair can exercise the patient's arms while also exercising the patient's legs, thereby speeding up the patient's rehabilitation. If the second mounting box 31 is not in contact with the second friction wheel 33, the massage device 2 will not massage the patient's legs when the wheelchair is not moving, thereby facilitating the movement of the device.

It should be noted that the specific installation method, circuit connection method and control method of the rehabilitation wheelchair 1, the drive motor 12 and the battery pack 13 in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (9)

1. A rehabilitation nursing wheelchair, comprising a rehabilitation wheelchair (1), characterized in that: a mounting plate (11) is installed at the lower part of the rehabilitation wheelchair (1), a driving motor (12) and a battery pack (13) for powering the driving motor (12) are fixed on the rear side of the bottom surface of the inner cavity of the mounting plate (11), two adjustable telescopic rods (14) are symmetrically fixed in the middle of the bottom surface of the inner cavity of the mounting plate (11), the output ends of the two adjustable telescopic rods (14) are both provided with a massage device (2), a first connecting rod (15) is rotatably installed on the side surfaces of the output ends of the two adjustable telescopic rods (14) close to each other, a first friction wheel (16) is commonly fixed on the ends of the two first connecting rods (15) close to each other, and a transmission device (3) is provided in the middle of the bottom surface of the inner cavity of the mounting plate (11). 2. A rehabilitation nursing wheelchair according to claim 1, characterized in that: the massage device (2) comprises a slider (21) which slides on the bottom surface of the inner cavity of the mounting plate (11) and is fixedly connected to the output end of the adjustable telescopic rod (14), a first support frame (22) is fixed to the upper end of the slider (21), a first mounting box (23) is fixed to the end of the first support frame (22) away from the slider (21), two first rotating rods (24) connected by belts are rotatably installed in the inner cavity of the first mounting box (23), cams (25) are fixedly installed on the outer surfaces of the two first rotating rods (24), and a sliding plate (23) is slidably installed in the inner cavity of the first mounting box (23). 6), the sliding plate (26) is slidably mounted with two support blocks (27) penetrating the first mounting box (23) at one end close to the cam (25), the inner cavity of the first mounting box (23) is provided with a through groove matched with the support blocks (27), the two support blocks (27) are fixedly mounted with a massage plate (28) located outside the first mounting box (23) at one end away from the cam (25), a buffer spring (29) is fixed between the massage plate (28) and the sliding plate (26), and a first return spring (291) is fixed between the sliding plate (26) and a side of the inner cavity of the first mounting box (23) away from the massage plate (28). 3. A rehabilitation and nursing wheelchair according to claim 2, characterized in that: a tensioner is fixed to the upper end of the slider (21), and a transmission belt is wound between any one of the first rotating rods (24) and the tensioner and the first connecting rod (15). 4. A rehabilitation and nursing wheelchair according to claim 2, characterized in that: the support block (27) also penetrates the sliding plate (26) toward the side away from the cam (25). 5. A rehabilitation and nursing wheelchair according to claim 2, characterized in that the outer surface of the cam (25) is always in contact with a side of the sliding plate (26) away from the massage plate (28). 6. A rehabilitation and nursing wheelchair according to claim 2, characterized in that when the first return spring (291) is in a natural state, the buffer spring (29) is in a natural state. 7. A rehabilitation nursing wheelchair according to claim 2, characterized in that: the transmission device (3) includes a second mounting box (31) fixed to the bottom surface of the inner cavity of the mounting plate (11), and the first friction wheel (16) is located in the second mounting box (31), the inner cavity of the second mounting box (31) is provided with a second connecting rod (32) parallel to the first connecting rod (15), and the second connecting rod (32) is connected to the driving motor (12) through a belt, and the outer surface of the second connecting rod (32) is fixed with a A second friction wheel (33); the outer surface of the second installation box (31) is provided with two first through grooves (34) matched with the first connecting rod (15); the upper portion of the outer surface of the second installation box (31) is symmetrically provided with second through grooves (35) parallel to the first through grooves (34); a second rotating rod (36) is movably installed in the inner cavity of the second through groove (35); a third friction wheel (37) matched with the second friction wheel (33) is fixed on the outer surface of the second rotating rod (36); and a limiting mechanism (38) is provided on the top surface of the inner cavity of the second installation box (31). 8. A rehabilitation nursing wheelchair according to claim 7, characterized in that: the mounting bracket (381) comprises a mounting bracket (381) rotatably connected to the second rotating rod (36), the end of the mounting bracket (381) away from the second rotating rod (36) is fixed with a support plate (382) slidably connected to the top surface of the inner cavity of the second mounting box (31), a second return spring (383) is fixed between the end of the support plate (382) away from the mounting bracket (381) and a side surface of the inner cavity of the second mounting box (31) close to the driving motor (12), a mounting groove (384) is provided at the upper end of the support plate (382), a third return spring (385) is fixed on the right side surface of the inner cavity of the mounting groove (384), a guide rod (386) sliding in the mounting groove (384) is fixed at the left end of the third return spring (385), and a C-shaped groove (387) adapted to the guide rod (386) is provided at the upper end of the second mounting box (31). 9. A rehabilitation and nursing wheelchair according to claim 8, characterized in that: when the third return spring (385) and the second return spring (383) are both in a natural state, the third friction wheel (37) is in contact with the second friction wheel (33).