Low-wear prosthetic knee joint

Abstract

The present disclosure relates to the field of rehabilitation auxiliary technology, and one embodiment of the present disclosure provides a low-wear prosthetic knee joint comprising a connecting block. Through the movement force of the contact plate, the hollow cylinder, the connecting spring, the rectangular plate, the transmission gear, the first rack, the hollow block, the sliding block, the second rack and other components are driven to cooperate with each other, the continuous movement of the fixed plate is realized, the roller is driven to rotate, then when the contact plate collides with the wall, the connecting spring fixed on the inner side wall of the hollow cylinder is affected by the driving force and shrinks, and the contact plate fixed on the other end is driven to move, when the contact plate moves, the first rack fixed on the back side is driven to move, and when the user uses the prosthesis to collide with the wall, the friction between the prosthesis and the wall is reduced, the wear is reduced, and the technical problem of the prior art of a low-wear prosthetic knee joint is solved.

Description

Technical Field

[0001] Embodiments of this disclosure relate to the field of rehabilitation assistive technology, and more specifically, to a low-wear prosthetic knee joint. Background Technology

[0002] With increasing societal attention to people with disabilities and advancements in rehabilitation medicine, the market demand for prosthetic knee joints is growing. Whether due to trauma, disease, or congenital limb defects, patients with lower limb loss rely on prosthetic knee joints to restore normal walking and daily activities as much as possible. According to relevant statistics, the number of people with limb disabilities worldwide is increasing year by year, further driving the research and innovation of prosthetic knee joint technology.

[0003] According to a public disclosure of a variable transmission ratio prosthetic knee joint (publication number: CN 114191152 A), it includes a turntable, two tension springs, a rotating shaft, two guide rail slider modules, a lead screw, a lead screw fixing component, a first gear, a force sensor, a leg tube connector, a lower support component, a connecting seat, a motor, a nut connector, a lead screw nut, two connecting rods, two side support components, a knee joint encoder, a sliding rotating shaft, and a second gear.

[0004] In the existing technology, when a user uses a prosthetic knee joint, it is easy for the prosthetic knee joint to collide with and rub against the wall, which causes severe wear and tear and needs to be improved. Utility Model Content

[0005] To overcome the above-mentioned defects, the embodiments of this disclosure provide a low-wear prosthetic knee joint, which solves the technical problem in the related art / prior art that prosthetic knee joints are prone to collision and friction with walls.

[0006] According to one aspect, at least one embodiment of this disclosure provides a low-wear prosthetic knee joint, including a connecting block, a rotating shaft extending through the side of the connecting block, a first limiting frame fixedly connected to the circumferential surface of the rotating shaft, a connecting plate fixedly connected to the inner sidewall of the first limiting frame, a fixing plate fixedly connected to the inner sidewall of the first limiting frame, and a low-wear mechanism provided on the circumferential surface of the fixing plate. The low-wear mechanism includes a hollow plate, which is fixedly connected to the circumferential surface of a fixed plate. A fixed shaft is rotatably connected to the inner sidewall of the fixed plate, and a roller is fixedly connected to the circumferential surface of the fixed shaft. A hollow cylinder is fixedly connected to the circumferential surface of the fixed plate, and a connecting spring is fixedly connected to the inner sidewall of the hollow cylinder. A contact plate is fixedly connected to the end of the connecting spring away from the hollow cylinder. A rectangular plate is fixedly connected to the circumferential surface of the fixed plate, and a rotating rod is rotatably connected to the top of the rectangular plate. A transmission gear is fixedly connected to the circumferential surface of the rotating rod. A first rack is fixedly connected to the rear side of the contact plate, and a hollow block is fixedly connected to the side of the rectangular plate. A sliding block is slidably connected to the bottom of the inner wall of the hollow block, and a second rack is fixedly connected to the top of the sliding block. This design facilitates buffering and offsetting when the contact plate collides with the wall, with the contact rod contacting the rear side of the contact plate.

[0007] For example, in at least one embodiment of this disclosure, a low-wear prosthetic knee joint is provided, which further includes: a second limiting frame fixedly connected to the circumferential surface of the rotating shaft, a limiting plate fixedly connected to the inner side wall of the second limiting frame, and a contact rod fixedly connected to the front side of the second rack. The above design is conducive to facilitating operation by the user.

[0008] The transmission gear meshes with the first rack and the transmission gear meshes with the second rack. The transmission gear is a full gear. This design is advantageous because when the transmission gear rotates, the second rack moves horizontally.

[0009] The contact rod is in contact with the contact plate, the side section of the fixing plate is set to be arc-shaped, and both the first limiting frame and the second limiting frame are set to be concave. The above design is conducive to conforming to the body characteristics of the user.

[0010] The hollow plate has an arc-shaped side section, and the number of fixing plates is set to two. This design helps to enhance the contact force.

[0011] According to another aspect, at least one embodiment of this disclosure also provides a low-wear prosthetic knee joint, including a lubrication mechanism provided on the side of a first limiting frame. The lubrication mechanism includes an oil spool, which is fixedly connected to the side of the first limiting frame. A valve is provided on the top of the oil spool, and an oil pipe passes through the bottom of the oil spool. The above design helps to prevent the pivot from rusting.

[0012] For example, in at least one embodiment of this disclosure, a low-wear prosthetic knee joint further includes: a transmission plate fixedly connected to the top of the contact plate, and a compression plate fixedly connected to the front and side of the transmission plate. This design facilitates operation by the user and increases practicality. The side cross-section of the transmission plate is L-shaped, and the side cross-section of the extrusion plate is arc-shaped. This design is beneficial because when the transmission plate moves, it drives the extrusion plate to move.

[0013] The oil pipe is located above the connecting block, and the oil slab is located on the movement trajectory of the extrusion plate. This design facilitates the entry of lubricating oil into the interior of the oil pipe when the extrusion plate extrudes the oil slab.

[0014] The lubrication mechanism is set to two, and they are symmetrical to each other along the vertical central axis at the top of the limiting plate. This design helps to enhance practicality.

[0015] The beneficial effects of the embodiments disclosed herein are as follows: 1. In this utility model, the movement of the contact plate drives the hollow cylinder, connecting spring, rectangular plate, transmission gear, first rack, hollow block, sliding block, second rack, and other components to work together to achieve continuous movement of the fixed plate. The roller is thus driven to rotate. Subsequently, when the contact plate collides with the wall, the connecting spring fixed to the inner wall of the hollow cylinder is affected by the driving force and thus contracts, driving the contact plate fixed to the other end to move. When the contact plate moves, it drives the first rack fixed to the rear side to move. When the first rack moves, the friction between the prosthesis and the wall is reduced when the user uses the prosthesis to collide with the wall, thus reducing wear.

[0016] 2. In this utility model, the movement of the contact plate enables the components such as the oil pan, valve, oil pipe, transmission plate, and extrusion plate to work together. When the contact plate moves, it drives the transmission plate fixed at the top to move. When the transmission plate moves, it drives the extrusion plate fixed on the side to move. When the extrusion plate moves to a certain position, it contacts the oil pan. As the extrusion plate continues to move, it prevents rust from forming at the prosthetic connection point during long-term use, thus improving the user experience. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0018] Figure 1 This is a three-dimensional appearance diagram of the present invention; Figure 2 This is a three-dimensional appearance diagram of the roller part of this utility model; Figure 3 This is a three-dimensional schematic diagram of the hollow cylinder of this utility model; Figure 4This is a three-dimensional perspective view of the extrusion plate of this utility model; Figure 5 This utility model Figure 3 A magnified 3D schematic diagram of A in the middle.

[0019] In the diagram: 1. Connecting block; 2. Rotating shaft; 3. First limiting frame; 4. Connecting plate; 5. Fixing plate; 6. Second limiting frame; 7. Limiting plate; 8. Low-wear mechanism; 81. Hollow plate; 82. Fixing shaft; 83. Roller; 84. Hollow cylinder; 85. Connecting spring; 86. Contact plate; 87. Rectangular plate; 88. Transmission gear; 89. First rack; 810. Hollow block; 811. Sliding block; 812. Second rack; 813. Contact rod; 814. Rotating rod; 9. Lubrication mechanism; 91. Oil drum; 92. Valve; 93. Oil pipe; 94. Transmission plate; 95. Extrusion plate. Detailed Implementation The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0020] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0022] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-5 As shown, it illustrates a low-wear prosthetic knee joint according to an embodiment of the present disclosure, including a connecting block 1, a rotating shaft 2 extending through the side of the connecting block 1, a first limiting frame 3 fixedly connected to the circumferential surface of the rotating shaft 2, a connecting plate 4 fixedly connected to the inner side wall of the first limiting frame 3, a fixing plate 5 fixedly connected to the inner side wall of the first limiting frame 3, and a low-wear mechanism 8 provided on the circumferential surface of the fixing plate 5. The low-wear mechanism 8 includes a hollow plate 81, which is fixedly connected to the circumferential surface of a fixed plate 5. A fixed shaft 82 is rotatably connected to the inner wall of the fixed plate 5. A roller 83 is fixedly connected to the circumferential surface of the fixed shaft 82. A hollow cylinder 84 is fixedly connected to the circumferential surface of the fixed plate 5. A connecting spring 85 is fixedly connected to the inner wall of the hollow cylinder 84. A contact plate 86 is fixedly connected to the end of the connecting spring 85 away from the hollow cylinder 84. A rectangular plate 87 is fixedly connected to the circumferential surface of the fixed plate 5. The top of the rectangular plate 87 rotates... A rotating rod 814 is dynamically connected, and a transmission gear 88 is fixedly connected to the circumferential surface of the rotating rod 814. A contact plate 86 is connected, and a first rack 89 is fixedly connected to the rear side of the contact plate 86. A hollow block 810 is fixedly connected to the side of the rectangular plate 87. A sliding block 811 is slidably connected to the bottom of the inner wall of the hollow block 810, and a second rack 812 is fixedly connected to the top of the sliding block 811. This design is beneficial because when the contact plate 86 collides with the wall, the contact rod 813 contacts the rear side of the contact plate 86 for buffering and offsetting. In some examples, the design also includes: a second limiting frame 6 is fixedly connected to the circumferential surface of the rotating shaft 2, a limiting plate 7 is fixedly connected to the inner side wall of the second limiting frame 6, and a contact rod 813 is fixedly connected to the front side of the second rack 812. The above design facilitates operation by the user.

[0026] The transmission gear 88 meshes with the first rack 89 and the second rack 812. The transmission gear 88 is a full gear. This design is beneficial because when the transmission gear 88 rotates, the second rack 812 will move horizontally.

[0027] The contact rod 813 is in contact with the contact plate 86. The side section of the fixing plate 5 is set to be arc-shaped. The first limiting frame 3 and the second limiting frame 6 are both set to be concave. The above design is conducive to conforming to the body characteristics of the user.

[0028] The side section of the hollow plate 81 is set to be arc-shaped, and the number of fixed plates 5 is set to two. The above design is conducive to enhancing the contact force.

[0029] For example, as shown in the figure, when a user uses the prosthesis, when the fixing plate 5 collides with the wall, the roller 83 fixed to the circumference of the fixing shaft 82 first contacts the wall. As the fixing plate 5 continues to move, the roller 83 is pushed and rotates. Subsequently, when the contact plate 86 collides with the wall, the connecting spring 85 fixed to the inner wall of the hollow cylinder 84 is affected by the pushing force and thus contracts, simultaneously driving the contact plate 86 fixed to the other end to move. When the contact plate 86 moves, it drives the first rack 89 fixed to the rear side to move. The movement of rack 89 causes the meshing transmission gear 88 to rotate under the driving force, and at the same time, the meshing second rack 812 is driven by the driving force, which drives the sliding block 811 sliding on the bottom of the inner wall of the hollow block 810 to move. When the sliding block 811 moves, it drives the second rack 812 to move, and at the same time, it drives the contact rod 813 fixed on the front side of the second rack 812 to move. When the contact rod 813 moves to a certain position, the contact rod 813 contacts the rear side of the contact plate 86, thereby blocking the contact plate 86 from continuing to move, and achieving the function of shock absorption and wear resistance.

[0030] Example 2 like Figures 1-5 As shown, it illustrates a low-wear prosthetic knee joint in another embodiment of this disclosure, which is largely the same as the technical solution of Embodiment 1. Therefore, only the differences are described in detail. The lubrication mechanism 9 is provided on the side of the first limiting frame 3. The lubrication mechanism 9 includes an oil spool 91, which is fixedly connected to the side of the first limiting frame 3. A valve 92 is provided on the top of the oil spool 91, and an oil pipe 93 passes through the bottom of the oil spool 91. The above design helps to prevent the rotating shaft 2 from rusting.

[0031] In some examples, a transmission plate 94 is fixedly connected to the top of the contact plate 86, and a pressing plate 95 is fixedly connected to the front and side of the transmission plate 94. This design facilitates operation by the user and increases practicality. The side cross-section of the transmission plate 94 is set to L-shape, and the side cross-section of the extrusion plate 95 is set to arc shape. The above design is beneficial to drive the extrusion plate 95 to move when the transmission plate 94 moves.

[0032] The oil pipe 93 is located above the connecting block 1, and the oil spool 91 is located on the movement trajectory of the extrusion plate 95. The above design is beneficial to the fact that when the extrusion plate 95 extrudes the oil spool 91, the lubricating oil enters the interior of the oil pipe 93.

[0033] The number of lubrication mechanisms 9 is set to two, and they are symmetrical to each other along the vertical central axis at the top of the limiting plate 7. The above design is conducive to enhancing practicality.

[0034] For example, as shown in the figure, when the contact plate 86 moves, it drives the transmission plate 94 fixed at the top to move. When the transmission plate 94 moves, it drives the extrusion plate 95 fixed on the side to move. When the extrusion plate 95 moves to a certain position, it contacts the oil naan 91. As the extrusion plate 95 continues to move, the oil naan 91 is squeezed. The lubricating oil stored inside the oil naan 91 drips onto the circumferential surface of the rotating shaft 2 through the oil pipe 93 penetrating the bottom, thereby completing the lubrication of the rotating shaft 2.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A low-wear prosthetic knee joint, characterized in that, Includes a connecting block (1), a rotating shaft (2) passing through the side of the connecting block (1), a first limiting frame (3) fixedly connected to the circumferential surface of the rotating shaft (2), a connecting plate (4) fixedly connected to the inner side wall of the first limiting frame (3), a fixing plate (5) fixedly connected to the inner side wall of the first limiting frame (3), and a low-wear mechanism (8) provided on the circumferential surface of the fixing plate (5). The low-wear mechanism (8) includes a hollow plate (81), which is fixedly connected to the circumferential surface of a fixed plate (5). A fixed shaft (82) is rotatably connected to the inner wall of the fixed plate (5). A roller (83) is fixedly connected to the circumferential surface of the fixed shaft (82). A hollow cylinder (84) is fixedly connected to the circumferential surface of the fixed plate (5). A connecting spring (85) is fixedly connected to the inner wall of the hollow cylinder (84). A contact plate (86) is fixedly connected to the end of the connecting spring (85) away from the hollow cylinder (84). The fixed plate (5) A rectangular plate (87) is fixedly connected to the circumference of the rectangular plate (87). A rotating rod (814) is rotatably connected to the top of the rectangular plate (87). A transmission gear (88) is fixedly connected to the circumference of the rotating rod (814). A contact plate (86) is fixedly connected to the rear side of the contact plate (86). A hollow block (810) is fixedly connected to the side of the rectangular plate (87). A sliding block (811) is slidably connected to the bottom of the inner wall of the hollow block (810). A second rack (812) is fixedly connected to the top of the sliding block (811).

2. The low-wear prosthetic knee joint according to claim 1, characterized in that, The circumferential surface of the rotating shaft (2) is fixedly connected to a second limiting frame (6), the inner side wall of the second limiting frame (6) is fixedly connected to a limiting plate (7), and the front side of the second rack (812) is fixedly connected to a contact rod (813).

3. The low-wear prosthetic knee joint according to claim 2, characterized in that, The transmission gear (88) meshes with the first rack (89), and the transmission gear (88) meshes with the second rack (812). The transmission gear (88) is configured as a full gear.

4. The low-wear prosthetic knee joint according to claim 3, characterized in that, The contact rod (813) is in contact with the contact plate (86), the side section of the fixing plate (5) is set to arc shape, and the first limiting frame (3) and the second limiting frame (6) are both set to concave shape.

5. A low-wear prosthetic knee joint according to claim 4, characterized in that, The side section of the hollow plate (81) is set to be arc-shaped, and the number of the fixing plates (5) is set to two.

6. A low-wear prosthetic knee joint according to claim 5, characterized in that, The first limiting frame (3) is provided with a lubrication mechanism (9) on its side. The lubrication mechanism (9) includes an oil spool (91). The oil spool (91) is fixedly connected to the side of the first limiting frame (3). A valve (92) is provided on the top of the oil spool (91). An oil pipe (93) passes through the bottom of the oil spool (91).

7. A low-wear prosthetic knee joint according to claim 6, characterized in that, A transmission plate (94) is fixedly connected to the top of the contact plate (86), and a pressing plate (95) is fixedly connected to the front and side sides of the transmission plate (94).

8. A low-wear prosthetic knee joint according to claim 7, characterized in that, The side cross-section of the transmission plate (94) is L-shaped, and the side cross-section of the extrusion plate (95) is arc-shaped.

9. A low-wear prosthetic knee joint according to claim 8, characterized in that, The oil pipe (93) is located above the connecting block (1), and the oil naan (91) is located on the movement trajectory of the extrusion plate (95).

10. A low-wear prosthetic knee joint according to claim 9, characterized in that, The number of the lubrication mechanism (9) is set to two, and they are symmetrical to each other along the vertical central axis of the top of the limiting plate (7).

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