A multi-link hydraulically adjustable knee joint

Abstract

The present invention relates to the technical field of bionic devices, specifically a multi-link hydraulically adjustable knee joint, which mainly includes a connecting shell 1, a connecting shell 2, which are arranged at the rear side of the connecting shell 1, a connecting head 1, which is arranged at the side of the connecting shell 1, a connecting mechanism, which is arranged inside the connecting shell 1 and the connecting shell 2, and a supporting mechanism, which is arranged inside the connecting shell 2. When a person uses it and walks in a bent manner, when the connecting shells 1 and 2 bend, the hydraulic rod 1 drives the arc plate to rotate, and the arc plate drives the connecting block to rotate a certain angle, and at the same time the connecting block pushes the hydraulic rod 2 to contract and rotate. Under the joint action of the hydraulic rod 1, the hydraulic rod 2 and the arc plate, the bending and straightening range of the connecting shells 1 and 2 is wider and the walking is smoother. The patient may not easily feel the stiffness and discomfort of the knee joint during walking, which ensures that the patient is more stable when walking and reduces the risk of falling.

Description

Technical Field

[0001] The invention relates to the technical field of bionic devices, in particular to a multi-link hydraulically adjustable knee joint. Background Art

[0002] In today's society, in order to help patients with lower limb amputation restore basic walking function, a prosthesis is usually installed at the patient's amputation site. At the same time, in order to improve the patient's walking experience, a hydraulic rod is also set at the position of the normal knee joint of the human body to adjust the knee joint, so that the patient can achieve the leg bending function during walking.

[0003] However, the existing hydraulic rod adjustment knee joint has certain limitations in design. Most hydraulic rod adjustment knee joints only realize the adjustment function through a simple hydraulic cylinder. Although this design can meet the basic needs of patients to a certain extent, in actual applications, this simple hydraulic cylinder adjustment method is not flexible enough in the leg bending process when people use it for walking due to the limited adjustment range of the hydraulic cylinder. Patients may feel stiffness and discomfort in the knee joint during walking. This stiffness will not only affect the patient's normal movement, but may also cause the patient to become unstable when walking, increasing the risk of falling.

[0004] Therefore, a multi-link hydraulically adjustable knee joint is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a multi-link hydraulically adjustable knee joint to solve the problems raised by the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A multi-link hydraulically adjustable knee joint, comprising: a connecting shell,

[0008] A second connecting shell, arranged at the rear side of the first connecting shell;

[0009] A connector 1, arranged on a side surface of the connecting shell;

[0010] A connecting mechanism, arranged inside the connecting shell 1 and the connecting shell 2, used to connect the connecting shell 1 and the connecting shell 2 and ensure mobility, the connecting mechanism comprising a hydraulic rod 1 hinged to the inner wall of the connecting shell 1;

[0011] The supporting mechanism is arranged inside the connecting shell 2 and is used to further support the connecting shell 1 and the connecting shell 2. The supporting mechanism includes two sleeves located inside the connecting shell 2.

[0012] Preferably, the other end of the hydraulic rod is hinged with a concave block and an arc plate, one end of the hydraulic rod, the side of the concave block and one end of the arc plate are hinged with the inner wall of one end of the connecting shell, and a groove is opened on the side of the concave block.

[0013] Preferably, a connecting block is hinged on the inner wall of one end of the second connecting shell, a connecting head 2 is fixedly installed on the side of the connecting block, and an outer wall on one side of the connecting block is hinged to one end of the arc plate.

[0014] Preferably, a connecting groove is provided on the inner wall side of the connecting block, a hydraulic rod 2 is hinged on the inner wall of the connecting groove, a fixing rod is hinged on the other end of the hydraulic rod 2, the other end of the fixing rod is fixedly connected to the inner wall of the connecting shell 1, a groove is provided on the side of the connecting shell, and the inner wall of one end of the connecting shell 2 is hinged to the side of the groove.

[0015] Preferably, a slide rod 1 and a slide rod 2 are slidably installed at both ends of the two sleeves, and one end of the slide rod 1 and one end of the slide rod 2 are hinged with an articulated block 1 and an articulated block 2 respectively, and the side surface of the articulated block 1 and the side surface of the articulated block 2 are fixedly connected to the side surface of the arc plate and the inner wall of the connecting shell 2 respectively.

[0016] Preferably, the other end of slide rod one and the other end of slide rod two are respectively fixedly installed with movable plate one and movable plate two, the outer wall of movable plate one and the outer wall of movable plate two are slidably connected to the inner wall of the sleeve, the side surface of movable plate one and the side surface of movable plate two are respectively fixedly installed with spring one and spring two, the other end of spring one and the other end of spring two are respectively fixedly installed with adjusting plate one and adjusting plate two, the outer wall of adjusting plate one and the outer wall of adjusting plate two are slidably connected to the inner wall of the sleeve.

[0017] Preferably, hinge blocks three are fixedly installed on the side surfaces of adjustment plate one and adjustment plate two respectively, the inner walls of the two hinge blocks three are hinged with hinge rods respectively, the other ends of the two hinge rods are hinged with hinge blocks four, a control rod is fixedly installed on the top surface of hinge block four, and the upper end of the control rod slides through the inner wall of the sleeve and extends to the top of the sleeve.

[0018] Preferably, a pull plate is fixedly mounted on the upper end of the control rod, a limit sleeve is slidably sleeved on the outer wall of the control rod, a plurality of support columns are fixedly mounted on the bottom surface of the limit sleeve, and the lower ends of the plurality of support columns are fixedly connected to the outer wall of the sleeve.

[0019] Preferably, the upper and lower outer walls of the sleeve, the upper and lower outer walls of the adjustment plate 1, and the upper and lower outer walls of the adjustment plate 2 are all provided with threaded holes, and the adjustment plate 1 and the adjustment plate 2 are fixed to the inner wall of the sleeve by bolts and threaded holes.

[0020] Preferably, H-shaped holes are provided through one and two side surfaces of the connection shell, and elliptical grooves are provided on one side surface and two side surfaces of the connection shell.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] When the present invention is used by a person, when walking in a bent manner, when the connecting shell 1 and the connecting shell 2 are bent, the hydraulic rod 1 drives the arc plate to rotate, and the arc plate drives the connecting block to rotate a certain angle, and at the same time the connecting block pushes the hydraulic rod 2 to contract and rotate. Under the joint action of the hydraulic rod 1, the hydraulic rod 2 and the arc plate, the bending and straightening range of the connecting shell 1 and the connecting shell 2 is wider and the walking is smoother. The patient may not easily feel the stiffness and discomfort of the knee joint during walking, which ensures that the patient is more stable when walking and reduces the risk of falling.

[0023] Through the set sleeve, slide bar 1, slide bar 2, hinge block 1 and hinge block 2 and other structures, when walking, spring 1 and spring 2 apply elastic force to moving plate 1 and moving plate 2, and support the arc plate through slide bar 1 and slide bar 2 and hinge block 1 and hinge block 2, thereby strengthening the supporting strength of the arc plate to connecting shell 1 and connecting shell 2, making it not easy to be damaged, and by adjusting the position of the control rod, the hinge block 4 is driven to move, and after driving the hinge block 3, adjusting plate 1 and adjusting plate 2 to move, the adjusting plate 1 and adjusting plate 2 are fixed by bolts, and then the elastic force of spring 1 and spring 2 is adjusted, and the supporting strength of the supporting mechanism can be adjusted as needed, with high flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the left side of the three-dimensional structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the right side of the three-dimensional structure of the present invention;

[0027] Figure 4 It is an exploded view of the three-dimensional structure of the present invention;

[0028] Figure 5 It is a schematic cross-sectional view of the three-dimensional structure of the present invention;

[0029] Figure 6 It is a schematic diagram of a partial three-dimensional structure of the present invention;

[0030] Figure 7 It is a schematic cross-sectional view of the three-dimensional structure of the sleeve of the present invention;

[0031] Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle.

[0032] In the figure:

[0033] 1. Connecting shell 1; 101. Connecting shell 2; 102. Connecting head 1; 103. Groove;

[0034] 2. Connecting mechanism; 201. Hydraulic rod 1; 202. Concave block; 203. Arc plate; 204. Slot body; 205. Connecting block; 206. Connecting head 2; 207. Connecting slot; 208. Hydraulic rod 2; 209. Fixed rod;

[0035] 3. Support mechanism; 301. Sleeve; 302. Slide bar 1; 303. Slide bar 2; 304. Articulated block 1; 305. Articulated block 2; 306. Moving plate 1; 307. Moving plate 2; 308. Spring 1; 309. Spring 2; 310. Adjusting plate 1; 311. Adjusting plate 2; 312. Articulated block 3; 313. Articulated rod; 314. Articulated block 4; 315. Control rod; 316. Pull plate; 317. Limit sleeve; 318. Support column; 319. Threaded hole; 320. Bolt;

[0036] 4. H-shaped hole; 5. Elliptical groove. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this application.

[0039] like Figure 1-8 As shown, the present application provides a multi-link hydraulically adjustable knee joint, comprising: a connecting shell 1, a connecting shell 2 101, which is arranged at the rear side of the connecting shell 1, a connecting head 102, which is arranged at the side of the connecting shell 1, a connecting mechanism 2, which is arranged inside the connecting shell 1 and the connecting shell 2 101, and is used to connect the connecting shell 1 and the connecting shell 2 101 and ensure mobility, the connecting mechanism 2 includes a hydraulic rod 1 201 hinged on the inner wall of the connecting shell 1, a supporting mechanism 3, which is arranged inside the connecting shell 2 101, and is used to further support the connecting shell 1 and the connecting shell 2 101, and the supporting mechanism 3 includes two sleeves 301 located inside the connecting shell 2 101.

[0040] In this embodiment: through the connecting mechanism 2, when a person walks, it can be ensured that the connection shell 1 and the connection shell 2 101 can be bent and straightened in a wider range and walking is smoother. The patient may not easily feel stiffness and discomfort in the knee joint during walking, which ensures that the patient is more stable when walking and reduces the risk of falling. At the same time, through the supporting mechanism 3, the device can be further supported to ensure the strength of the device, prevent damage, and increase the service life.

[0041] Specifically, Figure 1-5 As shown, the other end of the hydraulic rod 201 is hinged with a recessed block 202 and an arc plate 203, one end of the hydraulic rod 201, the side of the recessed block 202 and one end of the arc plate 203 are all hinged with the inner wall of one end of the connecting shell 1, and a groove 204 is provided on the side of the recessed block 202.

[0042] In this embodiment, by setting the arc plate 203, when the connection shell 1 1 and the connection shell 2 101 are moved, the arc plate 203 can adjust and support the connection shell 1 1 and the connection shell 2 101 to ensure the stability of the activity of the device.

[0043] Specifically, Figure 1-5 As shown, a connecting block 205 is hingedly connected to the inner wall of one end of the connecting shell 101 2, a connecting head 206 is fixedly installed on the side of the connecting block 205, and an outer wall on one side of the connecting block 205 is hingedly connected to one end of the arc plate 203.

[0044] In this embodiment, the connecting shell 101 is hinged with the connecting block 205, so that the connecting block 205 can be movable, and the device can be moved and supported by the joint action of the connecting block 205 and the arc plate 203.

[0045] Specifically, Figure 1-5 As shown, a connecting groove 207 is provided on the inner wall side of the connecting block 205, a hydraulic rod 208 is hinged on the inner wall of the connecting groove 207, a fixing rod 209 is hinged on the other end of the hydraulic rod 208, the other end of the fixing rod 209 is fixedly connected to the inner wall of the connecting shell 1, a groove 103 is provided on the side of the connecting shell 1, and the inner wall of one end of the connecting shell 2 101 is hinged to the side of the groove 103.

[0046] In this embodiment, by providing a second hydraulic rod 208, the second hydraulic rod 208 further supports and moves the connection block 205, so that the connection block 205 moves more smoothly, is less likely to get stuck and damaged, and ensures the safety of personnel use.

[0047] Specifically, Figure 6-8As shown, a slide bar 1 302 and a slide bar 2 303 are respectively slidably installed at both ends of the two sleeves 301, and one end of the slide bar 1 302 and one end of the slide bar 2 303 are respectively hinged with a hinge block 1 304 and a hinge block 2 305, and the side surfaces of the hinge block 1 304 and the side surfaces of the hinge block 2 305 are respectively fixedly connected to the side surfaces of the arc plate 203 and the inner wall of the connecting shell 2 101.

[0048] In this embodiment, the sleeve 301, the slide bar 1 302 and the slide bar 2 303 are provided to further support the arc plate 203, so that the arc plate 203 is more stable, and the strength of supporting the device is higher and not easy to be damaged.

[0049] Specifically, Figure 6-8 As shown, the other end of the slide bar 1 302 and the other end of the slide bar 2 303 are respectively fixedly installed with a moving plate 1 306 and a moving plate 2 307, the outer wall of the moving plate 1 306 and the outer wall of the moving plate 2 307 are slidably connected to the inner wall of the sleeve 301, the side of the moving plate 1 306 and the side of the moving plate 2 307 are respectively fixedly installed with a spring 1 308 and a spring 2 309, the other end of the spring 1 308 and the other end of the spring 2 309 are respectively fixedly installed with an adjusting plate 1 310 and an adjusting plate 2 311, the outer wall of the adjusting plate 1 310 and the outer wall of the adjusting plate 2 311 are slidably connected to the inner wall of the sleeve 301.

[0050] In this embodiment: through the setting of spring 1 308 and spring 2 309, elastic force is applied to movable plate 1 306 and movable plate 2 307, and movable plate 1 306 and movable plate 2 307 transmit the elastic force to sliding bar 1 302 and sliding bar 2 303, so that sliding bar 1 302 and sliding bar 2 303 can be freely extended and retracted, further improving the smoothness of the device.

[0051] Specifically, Figure 6-8 As shown, hinge blocks three 312 are fixedly installed on the side of adjustment plate one 310 and the side of adjustment plate two 311 respectively, hinge rods 313 are hinged on the inner walls of the two hinge blocks three 312 respectively, hinge blocks four 314 are hinged on the other ends of the two hinge rods 313, and a control rod 315 is fixedly installed on the top surface of the hinge block four 314, and the upper end of the control rod 315 slides through the inner wall of the sleeve 301 and extends to the top of the sleeve 301.

[0052] In this embodiment: by adjusting the control rod 315, the hinge block four 314 is driven to move, the hinge block four 314 drives the hinge rod 313 to move, and the hinge rod 313 adjusts the position of the adjustment plate one 310 and the adjustment plate two 311 through the hinge block three 312, and then the elastic force of the spring one 308 and the spring two 309 can be adjusted as needed.

[0053] Specifically, Figure 6-8As shown, a pull plate 316 is fixedly installed on the upper end of the control rod 315, a limit sleeve 317 is slidably sleeved on the outer wall of the control rod 315, a plurality of support columns 318 are fixedly installed on the bottom surface of the limit sleeve 317, and the lower ends of the plurality of support columns 318 are fixedly connected to the outer wall of the sleeve 301.

[0054] In this embodiment, the limiting sleeve 317 is provided to limit the control rod 315 when the control rod 315 moves, thereby preventing the control rod 315 from deflecting and improving the stability of the control rod 315.

[0055] Specifically, Figure 6-8 As shown, the upper and lower outer walls of the sleeve 301 , the upper and lower outer walls of the adjustment plate 1 310 , and the upper and lower outer walls of the adjustment plate 2 311 are all provided with threaded holes 319 , and the adjustment plate 1 310 and the adjustment plate 2 311 are fixed to the inner wall of the sleeve 301 by bolts 320 and threaded holes 319 .

[0056] In this embodiment: by setting the threaded holes 319 and the bolts 320, after the positions of the adjustment plates 1 310 and 2 311 are adjusted, the adjustment plates 1 310 and 2 311 can be fixed, so that the adjustment plates 1 310 and 2 311 are not easily displaced, thereby improving the support stability.

[0057] Specifically, Figure 1-8 As shown, H-shaped holes 4 are formed through both sides of the connection shell 1, and elliptical grooves 5 are formed on the sides of the connection shell 1 and the connection shell 2 101.

[0058] In this embodiment, the H-shaped hole 4 is provided, so that the connecting shell 1 has a certain toughness and is more cost-effective.

[0059] The specific solution is as follows: when a person uses the walking support and bends, the connecting shell 1 1 and the connecting shell 2 101 bend, and the hydraulic rod 1 201 drives the arc plate 203 to rotate, and the arc plate 203 drives the connecting block 205 to rotate a certain angle, and at the same time, the connecting block 205 pushes the hydraulic rod 208 to contract and rotate. Under the joint action of the hydraulic rod 1 201, the hydraulic rod 208 and the arc plate 203, the bending and straightening range of the connecting shell 1 1 and the connecting shell 2 101 is wider and the walking is smoother. The patient may not easily feel the stiffness and discomfort of the knee joint during walking, which ensures that the patient is more stable when walking and reduces the risk of falling. The sleeve 301, the sliding bar 1 302, the sliding bar 2 303, the hinge block 1 304 and the hinge block 2 305 are set. 05 and other structures. When walking, spring one 308 and spring two 309 apply elastic force to moving plate one 306 and moving plate two 307, and support the arc plate 203 through sliding rod one 302 and sliding rod two 303 and hinge block one 304 and hinge block two 305, thereby strengthening the supporting strength of the arc plate 203 to the connecting shell one 1 and the connecting shell two 101, which is not easy to be damaged. By adjusting the position of the control rod 315, the hinge block four 314 is driven to move, and the hinge block three 312, the adjustment plate one 310 and the adjustment plate two 311 are driven to move. Then, the adjustment plate one 310 and the adjustment plate two 311 are fixed by bolts 320, and then the elastic force of spring one 308 and spring two 309 is adjusted. The supporting strength of the support mechanism 3 can be adjusted as needed, and the flexibility is high.

[0060] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary; within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0061] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-link hydraulically adjustable knee joint, comprising: The connecting shell 1 (1) is characterized in that: A second connecting shell (101), arranged at the rear side of the first connecting shell (1); Connector 1 (102), arranged on the side of the connecting shell 1 (1); A connecting mechanism (2) is arranged inside the connecting shell one (1) and the connecting shell two (101), and is used to connect the connecting shell one (1) and the connecting shell two (101) and ensure mobility. The connecting mechanism (2) comprises a hydraulic rod one (201) hinged on the inner wall of the connecting shell one (1), and the other end of the hydraulic rod one (201) is hinged with a concave block (202) and an arc plate (203). One end of the hydraulic rod one (201), the side surface of the concave block (202), and one end of the arc plate (203) are all hinged to the inner wall of one end of the connecting shell one (1), and the side surface of the concave block (202) is provided with a groove body (204). The inner wall of one end of the connecting shell two (101) is A connecting block (205) is hingedly connected, a second connecting head (206) is fixedly installed on the side of the connecting block (205), an outer wall of one side of the connecting block (205) is hingedly connected to one end of the arc-shaped plate (203), a connecting groove (207) is provided on the side of the inner wall of the connecting block (205), a second hydraulic rod (208) is hingedly connected to the inner wall of the connecting groove (207), a fixing rod (209) is hingedly connected to the other end of the second hydraulic rod (208), the other end of the fixing rod (209) is fixedly connected to the inner wall of the connecting shell (1), a groove (103) is provided on the side of the connecting shell (1), and the inner wall of one end of the connecting shell (101) is hingedly connected to the side of the groove (103); A support mechanism (3) is arranged inside the second connecting shell (101) and is used to support the first connecting shell (1) and the second connecting shell (101). The support mechanism (3) includes two sleeves (301) located inside the second connecting shell (101). The two ends of the two sleeves (301) are respectively slidably penetrated by a slide bar (302) and a slide bar (303). One end of the slide bar (302) and one end of the slide bar (303) are respectively hinged with an articulated block (304) and an articulated block (305). The side surface of the articulated block (304) and the side surface of the articulated block (305) are respectively fixedly connected to the side surface of the arc plate (203) and the inner wall of the second connecting shell (101).

2. A multi-link hydraulically adjustable knee joint according to claim 1, characterized in that: The other end of the slide bar 1 (302) and the other end of the slide bar 2 (303) are respectively fixedly mounted with a moving plate 1 (306) and a moving plate 2 (307); the outer wall of the moving plate 1 (306) and the outer wall of the moving plate 2 (307) are slidably connected to the inner wall of the sleeve (301); the side surface of the moving plate 1 (306) and the side surface of the moving plate 2 (307) are respectively fixedly mounted with a spring 1 (308) and a spring 2 (309); the other end of the spring 1 (308) and the other end of the spring 2 (309) are respectively fixedly mounted with an adjusting plate 1 (310) and an adjusting plate 2 (311); the outer wall of the adjusting plate 1 (310) and the outer wall of the adjusting plate 2 (311) are slidably connected to the inner wall of the sleeve (301).

3. A multi-link hydraulically adjustable knee joint according to claim 2, characterized in that: A hinge block three (312) is fixedly installed on the side of the adjustment plate one (310) and the side of the adjustment plate two (311), and the inner walls of the two hinge blocks three (312) are hinged with hinge rods (313) respectively, and the other ends of the two hinge rods (313) are hinged with hinge blocks four (314), and a control rod (315) is fixedly installed on the top surface of the hinge block four (314), and the upper end of the control rod (315) slides through the inner wall of the sleeve (301) and extends to the top of the sleeve (301).

4. A multi-link hydraulically adjustable knee joint according to claim 3, characterized in that: A pull plate (316) is fixedly mounted on the upper end of the control rod (315); a limit sleeve (317) is slidably sleeved on the outer wall of the control rod (315); a plurality of support columns (318) are fixedly mounted on the bottom surface of the limit sleeve (317); and the lower ends of the plurality of support columns (318) are fixedly connected to the outer wall of the sleeve (301).

5. The multi-link hydraulically adjustable knee joint according to claim 4, characterized in that: The upper and lower outer walls of the sleeve (301), the upper and lower outer walls of the adjustment plate 1 (310), and the upper and lower outer walls of the adjustment plate 2 (311) are all provided with threaded holes (319), and the adjustment plate 1 (310) and the adjustment plate 2 (311) are fixed to the inner wall of the sleeve (301) via bolts (320) and the threaded holes (319).

6. The multi-link hydraulically adjustable knee joint according to claim 1, characterized in that: Both sides of the connection shell one (1) are provided with H-shaped holes (4) extending therethrough, and both the side surfaces of the connection shell one (1) and the connection shell two (101) are provided with elliptical grooves (5).

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