CN217510730U

CN217510730U - Wheelchair pedal capable of rotating and lifting

Info

Publication number: CN217510730U
Application number: CN202120348139.0U
Authority: CN
Inventors: 顾永辉; 程建军; 吴昌琳
Original assignee: Shanghai Citong Technology Co ltd
Current assignee: Shanghai Citong Technology Co ltd
Priority date: 2021-02-07
Filing date: 2021-02-07
Publication date: 2022-09-30
Anticipated expiration: 2031-02-07

Abstract

The utility model provides a but wheelchair running-board of rotary lift, including frame, seat, wheel and running-board structure, the seat is installed on the frame, the bottom at the frame is installed to the wheel, the running-board structure rotates the front portion that sets up at the frame, still be provided with the drive assembly who is used for driving the motion of running-board structure on the frame, drive assembly drive running-board structure rotates the front portion of frame or rotates the bottom of frame from the front portion of frame from the bottom of frame, just still follow vertical direction and be elevating movement when the running-board structure pivoted. The driving assembly drives the pedal to rotate and lift, insecurity of a user caused by bending over and turning the pedal is reduced, the user puts feet when the pedal is at a low position, the feet are gradually lifted along with upward movement of the pedal, and the problem that the pedal is too high and inconvenient to put the feet is solved, so that the convenience of taking the user is improved.

Description

Wheelchair pedal capable of rotating and lifting

Technical Field

The utility model relates to a tool technical field of riding instead of walk specifically, relates to a rotatable wheelchair running-board that goes up and down.

Background

Wheelchairs are chairs equipped with wheels to help replace walking and are classified into electric and manual folding wheelchairs. The wheelchair not only meets the requirements of physical disabilities and mobility-handicapped people for riding instead of walking, but also is more important to facilitate the family members to move and take care of the patients, so that the patients can do physical exercises and participate in social activities by means of the wheelchair.

At present, pedals in wheelchairs are basically fixed, and the following problems exist in the pedals: 1. For people with different heights, the fixed pedal is not comfortable to ride; 2. because the fixed pedal extends out of the wheelchair, the wheelchair is still large in occupied space and inconvenient to store after being folded, and the wheelchair is difficult to get on and off due to the obstruction of the pedal.

The prior Chinese patent with the publication number of CN210582887U discloses a foldable pedal mechanism of a wheelchair, which comprises the wheelchair, wherein the wheelchair is provided with a wheelchair framework and a pedal, and is characterized in that a pedal supporting cross rod is arranged on the front side of the lower part of the wheelchair framework, a pair of pedal supporting vertical rods is arranged on the pedal supporting cross rod in a sliding manner, the front ends of the pair of pedal supporting vertical rods are hinged with a pedal, and the pedal can turn around the hinged point of the front ends of the pedal supporting vertical rods and the pedal supporting vertical rods. The utility model provides a running-board can be around carrying out flexible regulation.

The inventor believes that the prior art pedal requires the user to bend down and lean forward to manually turn over, most of the wheelchair users have inconvenience in legs and feet, and the pedal is installed at a low position, so that the operation of the user is difficult, and there is a need for improvement.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims at providing a wheelchair pedal capable of rotating and lifting.

According to the utility model provides a pair of rotatable wheelchair running-board that goes up and down, including frame, seat, wheel and running-board structure, the seat is installed on the frame, the bottom at the frame is installed to the wheel, the running-board structure rotates the front portion that sets up at the frame, still be provided with the drive assembly who is used for driving the motion of running-board structure on the frame, drive assembly drive running-board structure rotates the front portion of frame or rotates the bottom of frame from the front portion of frame from the bottom of frame, just still follow vertical direction and be elevating movement when the running-board structure pivoted.

Preferably, the pedal structure comprises a pedal and a connecting assembly, the connecting assembly comprises a connecting swing rod and a rotating shaft, any one end of the connecting swing rod is fixedly connected with the pedal, the other end of the connecting swing rod is fixedly connected with the rotating shaft, and the rotating shaft is vertically rotated, lifted and arranged at the front part of the frame.

Preferably, the front end of frame is fixed with the mount pad, one side fixed mounting that the frame was kept away from to the mount pad has the fixing base, mount pad and fixing base cooperation installation rotation axis and drive assembly, just the two of mount pad and fixing base rotate the cooperation of sliding with the rotation axis respectively.

Preferably, the lower side of the mounting seat is provided with a groove, the groove is semicircular in shape, the rotating shaft is provided with a convex rib, and the convex rib is embedded in the groove and is in sliding fit with the groove.

Preferably, the pedal plate is provided with a bending part, and when the pedal plate is positioned in front of the frame, the bending part is positioned at the edge of one side of the pedal plate, which is far away from the central axis of the frame.

Preferably, the driving assembly comprises a fourth transmission shaft rod, a third control handle and a second cylindrical cam, the second cylindrical cam is vertically and fixedly installed between the installation seat and the fixed seat, and a second curve groove wound around the central axis of the second cylindrical cam is formed in the peripheral side wall of the second cylindrical cam; the fourth transmission shaft lever coaxially penetrates through the second cylindrical cam and is in sliding fit with the second cylindrical cam in a rotating mode, a matching roller is arranged on the outer side wall of the fourth transmission shaft lever, the matching roller is embedded in the second curve groove and is in rolling fit with the second curve groove, the third control handle is fixedly connected with the top end of the fourth transmission shaft lever, and the lower end of the fourth transmission shaft lever is coaxially and fixedly connected with the upper end of the rotating shaft.

Preferably, the driving assembly comprises a threaded sleeve, a fifth transmission shaft rod and a fourth control handle, the threaded sleeve is vertically and fixedly installed between the mounting seat and the fixing seat, the fifth transmission shaft rod coaxially penetrates through the threaded sleeve and is in threaded fit with the threaded sleeve, the fourth control handle is fixedly connected with the top end of the fifth transmission shaft rod, and the lower end of the fifth transmission shaft rod is fixedly connected with the rotating shaft.

Preferably, the fifth transmission shaft is provided with a threaded portion, and the external thread of the threaded portion is meshed with the internal thread of the threaded sleeve.

Preferably, the pedal plates are arranged on the left side and the right side of the front part of the frame in a rotating and lifting mode.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model realizes the switching of the position of the pedal plate between the bottom of the frame and the front of the frame by driving the pedal plate structure to rotate through the driving component, and enables the pedal plate to rotate in the horizontal direction, thereby being beneficial to solving the problem of the blockage of the pedal plate when a user gets on or off the wheelchair, reducing the unsafety caused by turning the pedal plate by bending the waist of the user and further being beneficial to improving the convenience of the user for adjusting the position of the pedal plate;

2. the utility model drives the pedal plate to do lifting movement through the driving component, a user puts feet when the pedal plate is at a low position, and the feet are gradually lifted along with the upward movement of the pedal plate, so that the problem that the pedal plate is too high and the feet are not convenient to put is solved, thereby being beneficial to improving the convenience of the user to take;

3. the utility model discloses a kink on running-board and the running-board that two intervals set up helps improving security and the convenience that the staff put the foot.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the overall structure of the utility model mainly embodying the pedal plate located at the front part of the frame;

FIG. 2 is a schematic view of the overall structure of the present invention mainly embodying the pedal located at the bottom of the frame;

fig. 3 is a schematic view of the present invention mainly showing the overall structure of the pedal connecting assembly;

fig. 4 is a schematic view of the overall structure of the driving assembly of the present invention;

fig. 5 is a schematic view of the overall structure of a driving assembly according to variation 1 of the present invention;

fig. 6 is an exploded view of a connection structure of a driving assembly and a connecting assembly according to variation 1 of the present invention;

fig. 7 is a schematic view of the overall structure of a drive unit according to variation 2 of the present invention;

fig. 8 is a schematic view of the overall structure of a drive unit according to variation 3 of the present invention;

fig. 9 is a schematic view of the overall structure of a drive unit according to variation 4 of the present invention.

Reference numerals are as follows: 1. a frame; 11. a seat; 12. a wheel; 13. a mounting seat; 131. a groove; 132. a linear guide groove; 14. a fixed seat; 15. a pedal structure; 2. a foot pedal; 21. a bending section; 3. a connecting assembly; 31. Connecting the swing rod; 32. a rotating shaft; 321. a rib is protruded; 4. a drive assembly; 41. a first drive shaft; 42. a first manipulating handle; 43. a first positioning sheet; 51. a second drive shaft; 511. a moving roller; 52. a second manipulating handle; 53. a first cylindrical cam; 531. a first curved groove; 532. linear convex ribs; 54. a second positioning sheet; 61. a reduction motor; 62. a third drive shaft; 63. a third positioning sheet; 71. a fourth drive shaft; 711. A mating roller; 72. a third manipulating handle; 73. a second cylindrical cam; 731. a second curved groove; 81. a threaded sleeve; 82. a fifth drive shaft; 821. a threaded portion; 83. and a fourth operating handle.

Detailed Description

The present invention will be described in detail with reference to specific embodiments. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way. It should be noted that various changes and modifications can be made by one skilled in the art without departing from the spirit of the invention. These all belong to the protection scope of the present invention.

As shown in fig. 1 and fig. 2, according to the utility model provides a but wheelchair running-board of rotary lift, including frame 1, seat 11, wheel 12 and running-board structure 15, seat 11 horizontal fixed mounting is on frame 1, and two are installed at the anterior of frame 1 bottom and rear portion symmetry respectively to wheel 12, and install two wheels 12 in frame 1 anterior and be the universal wheel.

The pedal structure 15 is installed at the front part of the frame 1, the pedal structure 15 comprises a pedal 2 and a connecting component 3, and the frame 1 is also provided with a driving component 4 for driving the pedal structure 15 to rotate. Under the conventional state, the pedal 2 is horizontally hung at the bottom of the frame 1; when the bicycle is used, a worker controls the connecting assembly 3 through the driving assembly 4 to drive the pedal plate 2 to rotate until the pedal plate 2 rotates to a proper position in the front of the bicycle frame 1, and the pedal plate 2 is located between the two universal wheels.

As shown in fig. 3, the footrest structures 15 are mounted one on each of the left and right sides of the front portion of the frame 1. When the bicycle is in an open state, the two pedals 2 are obliquely and upwards arranged from one side close to the bicycle frame 1 to the side far away from the bicycle frame 1, and the edge positions of one side of the two pedals 2 far away from the central axis of the bicycle frame 1 are integrally formed with a bending part 21, so that the comfort and the safety of a user are improved.

Since the two pedal structures 15 are identical in composition and mounting structure to the frame 1, a set of pedal structures 15 will be described as an example.

As shown in fig. 3, a mounting seat 13 is vertically welded and fixed at the front end of the frame 1, the mounting seat 13 is located behind the universal wheel, and a fixing seat 14 is fixedly connected to one side of the mounting seat 13 departing from the frame 1 through a bolt. The connecting assembly 3 comprises a connecting swing rod 31 and a rotating shaft 32, the rotating shaft 32 is vertically installed at the lower sides of the installation seat 13 and the fixed seat 14 and is in running fit with the installation seat 13 and the fixed seat 14 respectively, any one end of the connecting swing rod 31 is fixedly connected with one side, close to the frame 1, of the pedal 2 in a welding mode, and the other end of the connecting swing rod 31 penetrates through one side of the rotating shaft 32 and is fixedly connected with the same. The connecting swing link 31 is curved and has a certain radian. When the pedal 2 is opened forward, the problem that the left-right width of the pedal 2 is too small due to the interference space formed by the universal wheels as the front wheels can be avoided, and the comfort of putting feet of a user is improved.

Further, a groove 131 is formed in the bottom wall of the mounting seat 13, the groove 131 is semicircular, and the central axis of the semicircular groove 131 is collinear with the central axis of the rotating shaft 32. The sidewall of the rotating shaft 32 is integrally formed with a rib 321, and the rib 321 penetrates into the groove 131 from bottom to top and is in sliding fit with the groove 131. Due to the guiding effect of the groove 131, on one hand, the stability of rotation of the rotating shaft 32 is improved, on the other hand, the rotation range of the rotating shaft 32 is limited, further, the movement range of the pedal plate 2 is limited, and the limit between the pedal plate 2 and the wheel 12 is reduced.

As shown in fig. 4, the driving assembly 4 includes a first transmission shaft rod 41 and a first control handle 42, the first transmission shaft rod 41 is vertically installed between the installation seat 13 and the fixed seat 14 and is respectively and rotatably matched with the installation seat 13 and the fixed seat 14, and the installation of the first transmission shaft rod 41 on the frame 1 is realized by the installation seat 13 and the fixed seat 14 in a matching and clamping manner. Coaxial integrated into one piece has first locating piece 43 on first transmission shaft pole 41, and first locating piece 43 has two along the length direction interval shaping of first transmission shaft pole 41 on first transmission shaft pole 41, and two first locating pieces 43 all inlay and establish in mount pad 13 and fixing base 14, and arbitrary first locating piece 43 equally divide respectively with mount pad 13 and fixing base 14 normal running fit.

The first operating handle 42 is welded and fixed to the top end of the first transmission shaft rod 41, and the lower end of the first transmission shaft rod 41 is coaxially and fixedly connected with the upper end of the rotating shaft 32. The user rotates the first manipulation handle 42 to rotate the rotation shaft 32, thereby rotating the footrests 2 and bringing the footrests 2 into the bottom of the frame 1, or rotating the footrests 2 from the bottom of the frame 1 to a proper position in front of the frame 1.

Modification example 1

As shown in fig. 5, the driving assembly 4 includes a second transmission shaft 51, a second control handle 52 and a first cylindrical cam 53, the first cylindrical cam 53 is vertically installed between the mounting seat 13 and the fixing seat 14 and is slidably engaged with the mounting seat 13 and the fixing seat 14, and a sliding direction of the first cylindrical cam 53 is the same as an axial direction of the first cylindrical cam 53. A first curved groove 531 is formed on the side wall of the first cylindrical cam 53, and the first curved groove 531 surrounds the central axis of the first cylindrical cam 53.

The second transmission shaft lever 51 is rotatably installed between the mounting seat 13 and the fixing seat 14, and the second transmission shaft lever 51 coaxially penetrates into the first cylindrical cam 53 from bottom to top and is in sliding fit with the first cylindrical cam. The outer side wall of the second transmission shaft 51 is embedded with a moving roller 511, and the moving roller 511 is embedded in the first curved groove 531 and is in rolling fit with the first curved groove. Still coaxial integrated into one piece has second spacer 54 on the second transmission axostylus axostyle 51, and second spacer 54 is located the outside of first cylindrical cam 53 lower part, and second spacer 54 level inlays and establishes between mount pad 13 and fixing base 14 and respectively with the two normal running fit, has improved the reliability that second transmission axostylus axostyle 51 installed on mount pad 13 and fixing base 14 with the help of second spacer 54, and has improved second transmission axostylus axostyle 51 pivoted stability.

The second control handle 52 is welded and fixed on the top end of the first cylindrical cam 53, and the lower end of the second transmission shaft 51 is coaxially welded and fixed with the upper end of the rotating shaft 32, so that the worker can lift or lower the first cylindrical cam 53 through the second control handle 52, and drive the second transmission shaft 51 to rotate and drive the rotating shaft 32 to rotate by means of the cooperation of the moving roller 511 and the first curved groove 531, thereby taking the pedal plate 2 into the bottom of the frame 1, or rotating the pedal plate 2 from the bottom of the frame 1 to a proper position in front of the frame 1.

As shown in fig. 5 and fig. 6, the mounting seat 13 is provided with a linear guide groove 132, the length direction of the linear guide groove 132 is in the same direction as the axial direction of the first cylindrical cam 53, a linear rib 532 is integrally formed on the outer side wall of the first cylindrical cam 53, the linear rib 532 is embedded in the linear guide groove 132, and the linear rib 532 is in sliding fit with the linear guide groove 132. On the one hand, the first cylindrical cam 53 is limited in rotation between the mounting seat 13 and the fixed seat 14, and on the other hand, the stability of the seat lifting movement of the first cylindrical cam 53 between the mounting seat 13 and the fixed seat 14 is improved.

Modification 2

As shown in fig. 7, the driving assembly 4 includes a speed reduction motor 61 and a third transmission shaft rod 62, the third transmission shaft rod 62 is vertically rotated and installed between the mounting seat 13 and the fixing seat 14, a third positioning piece 63 is coaxially and integrally formed on the third transmission shaft rod 62, the third positioning piece 63 is formed on the third transmission shaft rod 62 along the axial interval of the third transmission shaft rod 62 and has two pieces, the two third positioning pieces 63 are all embedded between the mounting seat 13 and the fixing seat 14, and the two third positioning pieces 63 are both in running fit with the mounting seat 13 and the fixing seat 14.

Gear motor 61 fixed mounting is in the upside of mount pad 13 and fixing base 14, and gear motor 61's organism is fixed by mount pad 13 and the 14 cooperation centre grippings of fixing base, and gear motor 61's output shaft passes through the fixed coaxial fixed connection of shaft coupling with the top of third transmission axostylus axostyle 62, and the lower extreme of third transmission axostylus axostyle 62 is connected with the upper end coaxial welding fixed connection of rotation axis 32.

The reduction motor 61 is started to drive the third transmission shaft 62 to stably rotate and drive the rotating shaft 32 to rotate, so as to take the pedal 2 into the bottom of the frame 1 or rotate the pedal 2 from the bottom of the frame 1 to a proper position in front of the frame 1.

Modification 3

As shown in fig. 8, the driving assembly 4 drives the pedal structure 15 to move up and down while driving the pedal structure 15 to rotate horizontally. The drive assembly 4 comprises a fourth transmission shaft 71, a third operating handle 72 and a second cylindrical cam 73. The second cylindrical cam 73 is vertically and fixedly installed between the installation seat 13 and the fixed seat 14, and the installation seat 13 and the fixed seat 14 are matched to stably clamp the second cylindrical cam 73. The fourth transmission shaft lever 71 coaxially penetrates through the second cylindrical cam 73 and is in sliding fit with the second cylindrical cam in a rotating manner.

A second curved groove 731 is formed in a circumferential side wall of the second cylindrical cam 73, and a track of the second curved groove 731 surrounds a central axis of the second cylindrical cam 73. The outer side wall of the fourth transmission shaft 71 is provided with a matching roller 711, the matching roller 711 is embedded in the second curved groove 731, and the matching roller 711 is in rolling fit with the second curved groove 731. The third control handle 72 is fixedly welded to the fourth transmission shaft 71, and the bottom of the fourth transmission shaft 71 is coaxially and fixedly welded to the top of the rotating shaft 32.

The worker rotates the fourth transmission shaft 71 through the third control handle 72, and the fourth transmission shaft 71 rotates and moves up and down along the axial direction of the second cylindrical cam 73 by the cooperation of the second curved groove 731 and the cooperation roller 711, so that the pedal 2 rotates and swings between the bottom of the frame 1 and the front of the frame 1 along the horizontal direction. The user can put the foot when running-board 2 low level, and along with running-board 2 rebound, the position of foot progressively promotes, has solved the too high inconvenient problem of putting the foot of running-board 2, has improved the convenience that the user took.

Modification 4

As shown in fig. 9, the driving assembly 4 drives the pedal structure 15 to move up and down while driving the pedal structure 15 to rotate horizontally. The driving assembly 4 comprises a threaded sleeve 81, a fifth transmission shaft rod 82 and a fourth control handle 83, the threaded sleeve 81 is vertically installed between the installation seat 13 and the fixed seat 14, and the threaded sleeve 81 is clamped and fixed by the installation seat 13 and the fixed seat 14 in a matching manner.

The fifth transmission shaft 82 coaxially penetrates through the threaded sleeve 81, a threaded portion 821 is integrally formed on the fifth transmission shaft 82, and the threaded portion 821 is in threaded fit with the threaded sleeve 81. The fourth control handle 83 is welded and fixed on the top of the fifth transmission shaft 82, and the bottom of the fifth transmission shaft 82 is coaxially welded and fixed with the rotating shaft 32.

The staff drives the fifth transmission shaft lever 82 to rotate by rotating the fourth control handle 83, and the fifth transmission shaft lever 82 is meshed with the internal thread of the threaded sleeve 81 through the external thread of the threaded portion 821 to be matched and rotated, so that the fifth transmission shaft lever 82 can move up and down while rotating, and further the pedal 2 can swing and move up and down along the horizontal direction between the bottom of the frame 1 and the front portion of the frame 1. The user can put the foot when running-board 2 low level, and along with running-board 2 rebound, the position of foot progressively promotes, has solved the too high inconvenient problem of putting the foot of running-board 2, has improved the convenience that the user took.

Principle of operation

In work, a worker drives the pedal plate structure 15 through the driving assembly 4, drives the pedal plate 2 to rotate and swing between the bottom of the frame 1 and the front part of the frame 1 through the rotating shaft 32 and the connecting swing rod 31, and meanwhile, enables the pedal plate 2 to do lifting motion along the vertical direction, so that when the pedal plate 2 is opened forwards, an interference space formed by wheels 12 positioned at the front part of the frame 1 can be bypassed, the pedal plate 2 with larger left-right width can be designed, and a user can put feet more comfortably; the pedal 2 is folded backwards to the bottom of the frame 1, the problem that the user is difficult to ride due to the obstruction of the pedal 2 when getting on or off the wheelchair is solved, and the convenience of the user in riding the wheelchair is improved; and running-board 2 is along vertical direction elevating movement, and the user can put the foot when running-board 2 low level, and along with running-board 2 rebound, the foot progressively promotes, solves the too high inconvenient problem of putting the foot of running-board 2 to help improving the convenience that the user took.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.

The foregoing description of the specific embodiments of the invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims

1. The wheelchair pedal capable of rotating and lifting is characterized by comprising a frame (1), a seat (11), wheels (12) and a pedal structure (15), wherein the seat (11) is installed on the frame (1), the wheels (12) are installed at the bottom of the frame (1), the pedal structure (15) is rotatably arranged at the front part of the frame (1), a driving assembly (4) for driving the pedal structure (15) to move is further arranged on the frame (1), the driving assembly (4) drives the pedal structure (15) to rotate from the bottom of the frame (1) to the front part of the frame (1) or from the front part of the frame (1) to the bottom of the frame (1), and the pedal structure (15) rotates and simultaneously performs lifting movement along the vertical direction.

2. The wheelchair footboard capable of rotating and lifting as claimed in claim 1, wherein the footboard structure (15) comprises a footboard (2) and a connecting assembly (3), the connecting assembly (3) comprises a connecting swing link (31) and a rotating shaft (32), any end of the connecting swing link (31) is fixedly connected with the footboard (2), the other end of the connecting swing link (31) is fixedly connected with the rotating shaft (32), and the rotating shaft (32) is vertically rotatably arranged at the front part of the frame (1) in a lifting manner.

3. A rotatable and liftable wheelchair footboard according to claim 2, wherein a mounting seat (13) is fixed to a front end of the frame (1), a fixing seat (14) is fixedly mounted to a side of the mounting seat (13) far away from the frame (1), the mounting seat (13) and the fixing seat (14) are matched to mount the rotating shaft (32) and the driving assembly (4), and the mounting seat (13) and the fixing seat (14) are respectively in rotational and sliding fit with the rotating shaft (32).

4. A rotatable up-down wheelchair footrest according to claim 3, characterized in that the lower side of the mounting base (13) is provided with a groove (131), the groove (131) is semicircular in shape, the rotating shaft (32) is provided with a rib (321), and the rib (321) is embedded in the groove (131) and is in sliding fit with the groove.

5. A rotatable wheelchair footrest capable of lifting and lowering as claimed in claim 1, wherein the footrest (2) is provided with a bending part (21), and when the footrest (2) is located at the front of the frame (1), the bending part (21) is located at an edge of the footrest (2) away from the central axis of the frame (1).

6. A rotatable liftable wheelchair footrest according to claim 3, wherein the driving assembly (4) comprises a fourth transmission shaft (71), a third control handle (72) and a second cylindrical cam (73), the second cylindrical cam (73) is vertically and fixedly installed between the mounting seat (13) and the fixing seat (14), and a second curved groove (731) is formed on the peripheral side wall of the second cylindrical cam (73) and surrounds the central axis of the second cylindrical cam (73);

the fourth transmission shaft lever (71) coaxially penetrates through the second cylindrical cam (73) and is in sliding fit with the second cylindrical cam in a rotating mode, a matching roller (711) is arranged on the outer side wall of the fourth transmission shaft lever (71), the matching roller (711) is embedded in the second curve groove (731) and is in rolling fit with the second curve groove, the third control handle (72) is fixedly connected with the top end of the fourth transmission shaft lever (71), and the lower end of the fourth transmission shaft lever (71) is coaxially and fixedly connected with the upper end of the rotating shaft (32).

7. The wheelchair footboard capable of rotating and lifting as claimed in claim 3, wherein the driving assembly (4) comprises a threaded sleeve (81), a fifth transmission shaft lever (82) and a fourth control handle (83), the threaded sleeve (81) is vertically and fixedly installed between the mounting seat (13) and the fixing seat (14), the fifth transmission shaft lever (82) coaxially penetrates through the threaded sleeve (81) and is in threaded fit with the threaded sleeve, the fourth control handle (83) is fixedly connected with the top end of the fifth transmission shaft lever (82), and the lower end of the fifth transmission shaft lever (82) is fixedly connected with the rotating shaft (32).

8. A rotatably liftable wheelchair footboard according to claim 7, characterized in that the fifth transmission shaft (82) is provided with a threaded portion (821), and the external thread of the threaded portion (821) engages the internal thread of the threaded sleeve (81).

9. A rotatably liftable wheelchair footrest according to claim 1, wherein one footrest (2) is rotatably liftable at both left and right sides of the front portion of the frame (1).