Multi-connecting-rod high-stability air pressure knee prosthesis

Abstract

The utility model relates to the technical field of artificial limbs, and particularly discloses a multi-connecting-rod high-stability air pressure knee artificial limb which is characterized in that a first gear is fixedly mounted on the side wall of a first rotating shaft, a second gear is meshed with the side wall of the first gear, a second rotating shaft is fixedly mounted in the second gear, and a first lantern ring is rotatably mounted on the side wall of the second rotating shaft; the first connecting rod is fixedly installed on the side wall of the first lantern ring, a pneumatic damping rod is fixedly installed at the end, away from the first lantern ring, of the first connecting rod, a second lantern ring is fixedly installed at the end, away from the first connecting rod, of the pneumatic damping rod, and the second lantern ring is rotationally installed on the side wall of the second rotating shaft. The connecting column is kept perpendicular to the ground due to gravity, the second gear does anticlockwise circular motion around the first gear, the second gear drives the pneumatic damping rod to slowly stretch, and the included angle between the first connecting rods is also decreased, so that the function of improving the stability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of prosthetics, and particularly relates to a multi-link high-stability pneumatic knee prosthetic limb. Background Art

[0002] A knee prosthetic limb is an artificial device designed for lower limb amputees, mainly used to replace and simulate the functions of the knee joint. It aims to help users restore the ability to walk, stand and perform other daily activities. A knee prosthetic limb usually includes an adjustable knee joint component, a prosthetic socket, a calf support structure and a foot component, combined with mechanical, hydraulic, pneumatic or electronic control systems to achieve bionic movement.

[0003] As disclosed in a Chinese patent: A knee prosthetic limb, patent number: CN219323545U. By setting up the device main body, during use, when the user needs to disassemble the upper limb and the lower limb, the user can unscrew the connecting bolts on the connecting ears and remove the connecting piece on the mounting plate. After removal, the user can easily separate the upper limb and the lower limb, which is convenient for the user to perform maintenance or replacement on the contact part, ensuring the long-term normal use of the device, effectively enhancing the practicality of the device. And, by setting that the upper limb is rotatably connected to the inner side of the rotating ring through a rotatable rotating sleeve, the connection friction method between the upper limb and the lower limb is changed from traditional sliding friction to rolling friction, which can greatly reduce the wear speed and extend the service life of the device, further enhancing the practicality of the device.

[0004] However, during the implementation of the above technical solution, it is found that there are at least the following technical problems: As described above, the device mostly uses bolts to install the upper limb and the lower limb. When the surface of the bolts rusts after long-term use, it may reduce the flexibility of the prosthetic limb. And when the bolts are stripped when using bolts to install the prosthetic limb, it may lead to a reduction in the stability of the prosthetic limb. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the utility model provides a multi-link high-stability pneumatic knee prosthetic limb, which solves the technical problems that as described above, the device mostly uses bolts to install the upper limb and the lower limb. When the surface of the bolts rusts after long-term use, it may reduce the flexibility of the prosthetic limb. And when the bolts are stripped when using bolts to install the prosthetic limb, it may lead to a reduction in the stability of the prosthetic limb.

[0007] (2) Technical Solutions

[0008] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0009] A multi-link high-stability pneumatic knee prosthesis, including an upper limb, wherein a second hinge plate is fixedly installed inside the upper limb, and a stabilizing mechanism is fixedly installed inside the upper limb. The stabilizing mechanism includes a first rotating shaft, a first gear, a second gear, a second rotating shaft, a first collar, a first connecting rod, a pneumatic damping rod, and a second collar. The first gear is fixedly installed on the side wall of the first rotating shaft, the second gear meshes with the side wall of the first gear, the second rotating shaft is fixedly installed inside the second gear, the first collar is rotatably installed on the side wall of the second rotating shaft, the first connecting rod is fixedly installed on the side wall of the first collar, one end of the first connecting rod away from the first collar is fixedly installed with a pneumatic damping rod, and one end of the pneumatic damping rod away from the first connecting rod is fixedly installed with a second collar, and the second collar is rotatably installed on the side wall of the second rotating shaft.

[0010] Preferably: A first hinge plate is hinged to the side wall of the second hinge plate, and a lower limb is fixedly installed on the side wall of the first hinge plate.

[0011] Preferably: A connecting column is fixedly installed at the bottom of the lower limb, and a leg sleeve is fixedly installed at the top of the upper limb.

[0012] Preferably: A third collar is rotatably installed on the second rotating shaft, and a second connecting rod is fixedly installed on the side wall of the third collar.

[0013] Preferably: A fourth collar is fixedly installed at one end of the second connecting rod away from the third collar, and a threaded rod is fixedly installed on the side wall of the first rotating shaft.

[0014] Preferably: A threaded sleeve is threadedly installed on the side wall of the threaded rod, and a bearing block is rotatably installed on the side walls of the first rotating shaft and the second rotating shaft.

[0015] (III) Beneficial effects

[0016] When the thigh drives the leg sleeve to lift, the leg sleeve drives the upper limb to move upward. Due to gravity, the connecting column will remain perpendicular to the ground. The second gear will make a counterclockwise circular motion around the first gear. The second gear drives the pneumatic damping rod to slowly extend, and the angle between the first connecting rods also becomes smaller. The connecting column will be swung forward due to inertia, the connecting column drives the lower limb to rotate clockwise, the lower limb drives the second rotating shaft to rotate clockwise, the second rotating shaft drives the second gear to rotate clockwise, the pneumatic damping rod slowly contracts, and the angle between the first connecting rods also becomes larger, supporting the second rotating shaft and the first rotating shaft, thereby achieving the function of increasing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines with the drawings to describe in detail as follows.

[0018] Figure 1 is the three-dimensional structure diagram of the present utility model;

[0019] Figure 2 is the structure diagram of the bearing block of the present utility model;

[0020] Figure 3 is the structure diagram of the pneumatic damping rod of the present utility model;

[0021] Figure 4 is the structure diagram of the second rotating shaft of the present utility model.

[0022] Legend: 11, connecting column; 12, lower limb; 13, first hinge plate; 14, second hinge plate; 15, upper limb; 16, leg sleeve; 17, first rotating shaft; 18, first gear; 19, second gear; 21, second rotating shaft; 22, first collar; 23, first connecting rod; 24, pneumatic damping rod; 25, second collar; 26, third collar; 27, second connecting rod; 28, fourth collar; 29, threaded rod; 31, threaded sleeve; 32, bearing block. Detailed implementation manners

[0023] In the embodiment of the present application, by providing a multi-link high-stability pneumatic knee prosthesis, the problems are effectively solved as follows: when installing the upper limb and the lower limb of the device with bolts, if the surface of the bolts rusts after long-term use, the flexibility of the prosthesis may be reduced; and when installing the prosthesis with bolts, if the bolts are stripped, the stability of the prosthesis may be reduced. When the thigh drives the leg sleeve to lift, the leg sleeve drives the upper limb to move upward and downward. Due to gravity, the connecting column will remain perpendicular to the ground. The second gear will make a counterclockwise circular motion around the first gear. The second gear drives the pneumatic damping rod to slowly extend, and the included angle between the first connecting rods also becomes smaller. The connecting column will be swung forward due to inertia. The connecting column drives the lower limb to rotate clockwise, and the lower limb drives the second rotating shaft to rotate clockwise. The second rotating shaft drives the second gear to rotate clockwise, and the pneumatic damping rod slowly contracts, and the included angle between the first connecting rods also becomes larger. The second rotating shaft and the first rotating shaft are supported, so as to achieve the function of increasing stability. The second connecting rod connects the first rotating shaft and the second rotating shaft, reduces the pressure between the first gear and the second gear, and prevents the second gear and the first gear from jamming. When it is necessary to stand for a long time, rotate the threaded sleeve counterclockwise. The threaded sleeve moves towards the upper limb direction and locks the first rotating shaft. The first rotating shaft cannot rotate, and the entire prosthesis can be fixed, reducing the fatigue of the wearer when standing, so as to achieve the function of locking the prosthesis.

[0024] Embodiment

[0025] Such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the technical solution in the embodiment of the present application effectively solves the technical problems that the above device uses bolts to install the upper limb and the lower limb. When the surface of the bolt rusts after long-term use, the flexibility of the prosthetic limb may be reduced. And when the bolt is stripped when using the bolt to install the prosthetic limb, the stability of the prosthetic limb may be reduced. The general idea is as follows: A multi-link high-stability pneumatic knee prosthetic limb, including an upper limb 15, a second hinge plate 14 is fixedly installed inside the upper limb 15, a stabilizing mechanism is fixedly installed inside the upper limb 15. The stabilizing mechanism includes a first rotating shaft 17, a first gear 18, a second gear 19, a second rotating shaft 21, a first collar 22, a first connecting rod 23, a pneumatic damping rod 24 and a second collar 25. The first gear 18 is fixedly installed on the side wall of the first rotating shaft 17, the second gear 19 meshes with the side wall of the first gear 18, the second rotating shaft 21 is fixedly installed inside the second gear 19, the first collar 22 is rotatably installed on the side wall of the second rotating shaft 21, the first connecting rod 23 is fixedly installed on the side wall of the first collar 22, one end of the first connecting rod 23 away from the first collar 22 is fixedly installed with a pneumatic damping rod 24, one end of the pneumatic damping rod 24 away from the first connecting rod 23 is fixedly installed with a second collar 25, and the second collar 25 is rotatably installed on the side wall of the second rotating shaft 21. The thigh drives the sleeve leg cylinder 16 to lift, the sleeve leg cylinder 16 drives the upper limb 15 to move from bottom to top. Due to gravity, the connecting column 11 will remain perpendicular to the ground. The second gear 19 will make a counterclockwise circular motion around the first gear 18. The second gear 19 drives the pneumatic damping rod 24 to slowly extend, and the included angle between the first connecting rods 23 also becomes smaller. The connecting column 11 will be swung forward due to inertia. The connecting column 11 drives the lower limb 12 to rotate clockwise, the lower limb 12 drives the second rotating shaft 21 to rotate clockwise, the second rotating shaft 21 drives the second gear 19 to rotate clockwise, the pneumatic damping rod 24 slowly contracts, and the included angle between the first connecting rods 23 also becomes larger, supporting the second rotating shaft 21 and the first rotating shaft 17, so as to achieve the function of increasing stability.

[0026] The side wall of the second hinge plate 14 is hinged with the first hinge plate 13. The lower limb 12 is fixedly installed on the side wall of the first hinge plate 13. The connecting column 11 is fixedly installed at the bottom of the lower limb 12. The leg sleeve 16 is fixedly installed at the top of the upper limb 15. The third collar 26 is rotatably installed on the second rotating shaft 21. The second connecting rod 27 is fixedly installed on the side wall of the third collar 26. One end of the second connecting rod 27 away from the third collar 26 is fixedly installed with the fourth collar 28. The threaded rod 29 is fixedly installed on the side wall of the first rotating shaft 17. The threaded sleeve 31 is threadedly installed on the side wall of the threaded rod 29. The second connecting rod 27 connects the first rotating shaft 17 and the second rotating shaft 21, reducing the pressure between the first gear 18 and the second gear 19 and preventing the second gear 19 from jamming with the first gear 18. When standing for a long time, rotate the threaded sleeve 31 counterclockwise. The threaded sleeve 31 moves towards the upper limb 15, locking the first rotating shaft 17 so that the first rotating shaft 17 cannot rotate, fixing the entire prosthetic limb and reducing the wearer's fatigue when standing, thus achieving the function of locking the prosthetic limb.

[0027] The bearing blocks 32 are rotatably installed on the side walls of the first rotating shaft 17 and the second rotating shaft 21, providing support for the first rotating shaft 17 and the second rotating shaft 21 and assisting in increasing the stability of the device.

[0028] Aiming at the problems existing in the prior art, the utility model provides a multi-link high-stability pneumatic knee prosthetic limb. The thigh drives the leg sleeve 16 to lift, and the leg sleeve 16 drives the upper limb 15 to move upward. Due to gravity, the connecting column 11 will remain perpendicular to the ground. The second gear 19 will make a counterclockwise circular motion around the first gear 18. The second gear 19 drives the pneumatic damping rod 24 to slowly extend, and the angle between the first connecting rods 23 also becomes smaller. The connecting column 11 will be swung forward due to inertia. The connecting column 11 drives the lower limb 12 to rotate clockwise, and the lower limb 12 drives the second rotating shaft 21 to rotate clockwise. The second rotating shaft 21 drives the second gear 19 to rotate clockwise, and the pneumatic damping rod 24 slowly contracts, and the angle between the first connecting rods 23 also becomes larger, supporting the second rotating shaft 21 and the first rotating shaft 17, thus achieving the function of increasing stability. The second connecting rod 27 connects the first rotating shaft 17 and the second rotating shaft 21, reducing the pressure between the first gear 18 and the second gear 19 and preventing the second gear 19 from jamming with the first gear 18. When standing for a long time, rotate the threaded sleeve 31 counterclockwise. The threaded sleeve 31 moves towards the upper limb 15, locking the first rotating shaft 17 so that the first rotating shaft 17 cannot rotate, fixing the entire prosthetic limb and reducing the wearer's fatigue when standing, thus achieving the function of locking the prosthetic limb.

[0029] Working principle:

[0030] First step, when walking, the thigh drives the leg sleeve 16 to lift, and the leg sleeve 16 drives the upper limb 15 to move upward. Due to gravity, the connecting column 11 will remain perpendicular to the ground. The second gear 19 will make a counterclockwise circular motion around the first gear 18. The second gear 19 drives the pneumatic damping rod 24 to slowly extend, and the angle between the first link rods 23 also becomes smaller. The connecting column 11 will be swung forward due to inertia. The connecting column 11 drives the lower limb 12 to rotate clockwise, the lower limb 12 drives the second rotating shaft 21 to rotate clockwise, the second rotating shaft 21 drives the second gear 19 to rotate clockwise, and the pneumatic damping rod 24 slowly contracts, and the angle between the first link rods 23 also becomes larger, supporting the second rotating shaft 21 and the first rotating shaft 17, so as to achieve the function of increasing stability.

[0031] Second step, the second link 27 connects the first rotating shaft 17 and the second rotating shaft 21, reducing the pressure between the first gear 18 and the second gear 19 and preventing the second gear 19 from jamming with the first gear 18. When standing for a long time, rotate the threaded sleeve 31 counterclockwise. The threaded sleeve 31 moves in the direction of the upper limb 15 to lock the first rotating shaft 17, and the first rotating shaft 17 cannot rotate, which can fix the entire prosthetic limb and reduce the wearer's fatigue when standing, so as to achieve the function of locking the prosthetic limb.

[0032] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A multi-link high-stability pneumatic knee prosthesis, comprising an upper limb (15), characterized in that, A second hinge plate (14) is fixedly installed inside the upper limb (15), and a stabilizing mechanism is fixedly installed inside the upper limb (15). The stabilizing mechanism includes a first rotating shaft (17), a first gear (18), a second gear (19), a second rotating shaft (21), a first collar (22), a first connecting rod (23), a pneumatic damping rod (24), and a second collar (25). The first gear (18) is fixedly installed on the side wall of the first rotating shaft (17), the second gear (19) meshes with the side wall of the first gear (18), and the second rotating shaft (21) is fixedly installed inside the second gear (19); wherein, the first collar (22) is rotatably installed on the side wall of the second rotating shaft (21), the first connecting rod (23) is fixedly installed on the side wall of the first collar (22), one end of the first connecting rod (23) away from the first collar (22) is fixedly installed with a pneumatic damping rod (24), one end of the pneumatic damping rod (24) away from the first connecting rod (23) is fixedly installed with a second collar (25), and the second collar (25) is rotatably installed on the side wall of the second rotating shaft (21).

2. The multi-link high-stability pneumatic knee prosthesis according to claim 1, wherein, A first hinge plate (13) is hinged to the side wall of the second hinge plate (14); wherein, a lower limb (12) is fixedly installed on the side wall of the first hinge plate (13).

3. The multi-link high-stability pneumatic knee prosthesis according to claim 2, wherein, A connecting column (11) is fixedly installed at the bottom of the lower limb (12); wherein, a leg sleeve (16) is fixedly installed at the top of the upper limb (15).

4. The multi-link high-stability pneumatic knee prosthesis according to claim 1, characterized in that, A third collar (26) is rotatably installed on the second rotating shaft (21); wherein, a second connecting rod (27) is fixedly installed on the side wall of the third collar (26).

5. The multi-link high-stability pneumatic knee prosthesis according to claim 4, characterized in that, One end of the second connecting rod (27) away from the third collar (26) is fixedly installed with a fourth collar (28); wherein, a threaded rod (29) is fixedly installed on the side wall of the first rotating shaft (17).

6. The multi-link high-stability pneumatic knee prosthesis according to claim 5, wherein, A threaded sleeve (31) is threadedly installed on the side wall of the threaded rod (29); wherein, a bearing block (32) is rotatably installed on the side walls of the first rotating shaft (17) and the second rotating shaft (21).

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