Knee joint prosthesis and lower limb prosthesis

Abstract

The invention provides a knee joint prosthesis and a lower limb prosthesis, and relates to the technical field of medical instruments. The knee joint prosthesis comprises a knee joint upper body, a knee joint lower body and a hydraulic rod; an offset rotating shaft is arranged on the knee joint upper body, one end of the hydraulic rod is pivoted in the knee joint lower body, and the other end of the hydraulic rod is pivoted with the offset rotating shaft, so that the knee joint upper body can drive the hydraulic rod to do telescopic motion when rotating relative to the knee joint lower body; the knee joint upper body is provided with a pivoting hole used for installing the pivoting shaft and a compression seam, the compression seam is located above the pivoting hole, the top of the knee joint upper body is provided with a connector used for being connected with the leg of a patient, and the knee joint upper body is provided with a first threaded connecting hole used for installing the connector. A locking hole is formed in the first threaded connecting hole, the locking hole penetrates through the compression seam to be communicated with the pivoting hole, a locking clamping column is arranged in the locking hole, and a locking piece used for limiting the locking clamping column is arranged at the top of the locking hole. The technical effect of improving the stability of the prosthesis is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a knee prosthesis and a lower limb prosthesis. BACKGROUND

[0002] In today's society, in order to help lower limb amputee patients recover basic walking function, a prosthesis is usually installed at the amputation position of the patient, and in order to improve the walking experience of the patient, a prosthetic knee joint is also provided at the position of the normal knee joint of the human body, so that the patient can realize the functions of flexion and extension during walking.

[0003] For the use of the knee prosthesis, it is very important to prevent the knee prosthesis from being bent randomly during the support period, which is the key to avoiding the user from falling; and the step frequency of the knee prosthesis during the swing period also plays an important role in the coordination of the user's walking.

[0004] The existing knee prosthesis has the disadvantages of large structure occupying space and unnatural gait of the wearer, and has the problems of poor stability and / or safety. SUMMARY

[0005] The purpose of the present application is to provide a knee prosthesis and a lower limb prosthesis to alleviate the technical problem of poor stability of the prosthesis in the prior art.

[0006] In a first aspect, the embodiments of the present application provide a knee prosthesis, comprising a knee upper body, a knee lower body and a hydraulic rod. The knee upper body is pivoted to the knee lower body through a pivot shaft. A bias pivot shaft is arranged on the knee upper body, one end of the hydraulic rod is pivoted in the knee lower body, and the other end is pivoted with the bias pivot shaft, so that when the knee upper body rotates relative to the knee lower body, the hydraulic rod can be driven to extend and retract. A pivot hole for mounting the pivot shaft is formed in the knee upper body, a compression slot is formed in the knee upper body, the compression slot is located above the pivot hole, a connecting head for connecting the patient's leg is arranged at the top of the knee upper body, a first threaded connection hole for mounting the connecting head is formed in the knee upper body, a locking hole is formed in the first threaded connection hole, the locking hole communicates with the pivot hole through the compression slot, a locking clamping column is arranged in the locking hole, the locking clamping column can abut against the pivot shaft, and a locking member for limiting the locking clamping column is arranged at the top of the locking hole.

[0007] With reference to the first aspect, in a possible implementation of the first aspect, the upper body of the knee joint is provided with an adjusting bolt, the adjusting bolt is arranged to pass through the upper body of the knee joint from the top of the upper body of the knee joint downwards, the adjusting bolt is arranged to extend into the compression gap, and the adjusting bolt is arranged to leave a gap with the lower surface of the compression gap when the upper body of the knee joint is not under pressure.

[0008] With reference to the first aspect, in a possible implementation of the first aspect, the adjusting bolt is provided in a plurality of numbers, and the plurality of adjusting bolts are arranged on the outer periphery of the upper body of the knee joint.

[0009] With reference to the first aspect, in a possible implementation of the first aspect, the hydraulic rod comprises a hydraulic shell, a plunger, a plunger rod and a cylinder sleeve. The cylinder sleeve is arranged to pass through the hydraulic shell, the plunger is arranged to slide in the cylinder sleeve, one end of the plunger rod is fixedly connected with the plunger, and the other end of the plunger rod extends out of the hydraulic shell and is connected with the biasing shaft.

[0010] With reference to the first aspect, in a possible implementation of the first aspect, the hydraulic shell comprises a cylinder body and an upper cover. The upper cover is arranged to be rotatably sealed on the cylinder body, and the plunger rod is arranged to be slidingly sealed with the upper cover.

[0011] With reference to the first aspect, in a possible implementation of the first aspect, a first cavity is formed between the plunger and the cylinder body, a second cavity is formed between the plunger and the upper cover, a third cavity is formed between the plunger and the cylinder sleeve, and a fourth cavity is formed between the cylinder sleeve and both the cylinder body and the upper cover. A first horizontal hole and a first vertical hole are arranged on the plunger, the first horizontal hole is arranged to communicate the third cavity and the first vertical hole, a lower end of the first vertical hole is provided with a first one-way valve arranged to unidirectionally communicate from the first vertical hole to the first cavity, and an upper end of the first vertical hole is provided with a second one-way valve arranged to unidirectionally communicate from the first vertical hole to the second cavity. A plurality of second vertical holes are arranged on the cylinder sleeve, the second vertical holes are arranged to communicate the second cavity and the fourth cavity, and a second horizontal hole is arranged on the cylinder sleeve, the second horizontal hole is arranged to communicate the first cavity and the fourth cavity.

[0012] With reference to the first aspect, in a possible implementation of the first aspect, an inclined annular flow channel is arranged in the inner ring of the bottom of the upper cover, and the depth of the inclined annular flow channel gradually increases from zero. The cylinder side wall is provided with a speed regulating channel for connecting the first cavity and the fourth cavity, and the speed regulating channel corresponds to the inclined annular flow channel.

[0013] With reference to the first aspect, a possible implementation of the first aspect is provided in the embodiments of the application, and in the implementation, when the plunger slides downward, the plunger can shield the second horizontal hole so that the second horizontal hole is located in the third cavity.

[0014] With reference to the first aspect, a possible implementation of the first aspect is provided in the embodiments of the application, and in the implementation, a bearing is arranged between the pivot shaft and the pivot hole.

[0015] In the second aspect, the embodiments of the application provide a lower limb prosthesis, which comprises the knee joint prosthesis.

[0016] Beneficial effects: The embodiments of the application provide a knee joint prosthesis, which comprises a knee joint upper body, a knee joint lower body and a hydraulic rod. The knee joint upper body is pivotally connected to the knee joint lower body through a pivot shaft. A biasing pivot is arranged on the knee joint upper body. One end of the hydraulic rod is pivotally connected to the knee joint lower body, and the other end of the hydraulic rod is pivotally connected to the biasing pivot, so that when the knee joint upper body rotates relative to the knee joint lower body, the hydraulic rod can be driven to extend or retract. A pivot hole for mounting the pivot shaft is arranged on the knee joint upper body. A compression slot is arranged on the knee joint upper body and located above the pivot hole. A connecting head for connecting to a patient's leg is arranged on the top of the knee joint upper body. A first threaded connecting hole for mounting the connecting head is arranged on the knee joint upper body. A locking hole is arranged in the first threaded connecting hole and communicates with the pivot hole through the compression slot. A locking clamping column is arranged in the locking hole and can abut against the pivot shaft. A locking member for limiting the locking clamping column is arranged on the top of the locking hole.

[0017] Specifically, in use, the user wears the knee joint upper body at the end of the thigh through the connecting head. When the user steps on the ground with the prosthetic leg, the thigh of the user is pressed on the knee joint upper body, and the part of the knee joint upper body above the compression slot is forced to press downward, so that the locking clamping column is pressed downward and can press the pivot shaft below, so that the knee joint upper body cannot rotate relative to the knee joint lower body. When the user steps on the other leg, the leg with the knee joint prosthesis does not sway or swing, and the stability and safety of the knee joint prosthesis are improved.

[0018] The embodiments of the application provide a lower limb prosthesis, which comprises the knee joint prosthesis. The prosthesis has the advantages of the prior art, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained based on these drawings without creative labor.

[0020] Figure 1 A schematic view of a knee prosthesis according to an embodiment of the present application; Figure 2 A sectional view of a knee prosthesis according to an embodiment of the present application; Figure 3 A schematic view of hydraulic oil flow in the early stage of lifting leg and stepping when using a knee prosthesis according to an embodiment of the present application; Figure 4 A schematic view of hydraulic oil flow in the late stage of lifting leg and stepping when using a knee prosthesis according to an embodiment of the present application; Figure 5 A schematic view of hydraulic oil flow in the early stage of landing when using a knee prosthesis according to an embodiment of the present application; Figure 6 A schematic view of hydraulic oil flow in the late stage of landing when using a knee prosthesis according to an embodiment of the present application; Figure 7 A schematic view of hydraulic oil flow in the late stage of landing when using a knee prosthesis according to an embodiment of the present application; Figure 3 A local enlarged view of A in FIG. 4;

[0021] FIG. 4 is a schematic view of a knee prosthesis according to an embodiment of the present application; 100 - upper body of knee joint; 101 - pivot joint hole; 110 - bias pivot; 120 - compression joint; 130 - connecting head; 140 - locking column; 150 - locking member; 160 - adjusting bolt; 200 - lower body of knee joint; 210 - pivot shaft; 300 - hydraulic rod; 310 - hydraulic shell; 311 - cylinder body; 312 - upper cover; 313 - inclined annular flow channel; 314 - speed regulating channel; 320 - plunger; 321 - first horizontal hole; 322 - first vertical hole; 330 - plunger rod; 340 - cylinder sleeve; 341 - second horizontal hole; 342 - second vertical hole; 410 - first cavity; 420 - second cavity; 430 - third cavity; 440 - fourth cavity; 510 - first one-way valve; 520 - second one-way valve. DETAILED DESCRIPTION

[0022] The technical solutions of the present application will be described clearly and completely in connection with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0023] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0024] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0025] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] The present application will be described in further detail below through specific embodiments and in connection with the drawings.

[0027] Reference is made to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, this embodiment provides a knee joint prosthesis, including an upper knee joint body 100, a lower knee joint body 200, and a hydraulic rod 300. The upper knee joint body 100 is pivotally connected to the lower knee joint body 200 via a pivot shaft 210. An offset pivot shaft 110 is provided on the upper knee joint body 100. One end of the hydraulic rod 300 is pivotally connected inside the lower knee joint body 200, and the other end is pivotally connected to the offset pivot shaft 110, so that when the upper knee joint body 100 rotates relative to the lower knee joint body 200, it can drive the hydraulic rod 300 to extend and retract. A pivot hole 10 for mounting the pivot shaft 210 is provided on the upper knee joint body 100. 1. A compression seam 120 is provided on the upper body 100 of the knee joint. The compression seam 120 is located above the pivot hole 101. A connector 130 for connecting the patient's leg is provided at the top of the upper body 100 of the knee joint. A first threaded connection hole for installing the connector 130 is provided on the upper body 100 of the knee joint. A locking hole is provided in the first threaded connection hole. The locking hole passes through the compression seam 120 and communicates with the pivot hole 101. A locking pin 140 is provided in the locking hole. The locking pin 140 can abut against the pivot shaft 210. A locking member 150 for limiting the locking pin 140 is provided at the top of the locking hole.

[0028] Specifically, during use, the user wears the upper knee joint 100 on the end of the thigh through the connector 130. When walking, after the user steps and the prosthesis touches the ground, the user's thigh presses against the upper knee joint 100. The part of the upper knee joint 100 above the compression seam 120 is pressed downward, which causes the locking pin 140 to press downward. The locking pin 140 can press against the lower pivot 210, thus preventing the upper knee joint 100 from rotating relative to the lower knee joint 200. When the user steps with the other leg, the leg with the knee prosthesis will not wobble or swing, improving the stability and safety of the knee prosthesis.

[0029] Among them, the locking component 150 uses a locking screw.

[0030] See Figures 1-7 As shown, in an optional embodiment, an adjusting bolt 160 is provided on the upper body 100 of the knee joint. The adjusting bolt 160 can be inserted downward from the top of the upper body 100 of the knee joint and can be inserted into the compression gap 120. When the upper body 100 of the knee joint is not under pressure, there is a gap between the adjusting bolt 160 and the lower surface of the compression gap 120.

[0031] The number of adjusting bolts 160 is multiple, and the multiple adjusting bolts 160 are set on the outer periphery of the upper body 100 of the knee joint.

[0032] Specifically, the adjusting bolt 160 is arranged on the knee upper body 100, the adjusting threaded hole is arranged on the top of the knee upper body 100, the adjusting bolt 160 is arranged in the adjusting threaded hole, the end of the adjusting threaded hole screwed into the adjusting threaded hole can extend into the compression gap 120, and the adjusting bolt 160 leaves a gap with the lower surface of the compression gap 120 when the knee upper body 100 is not under pressure. When the user walks, after the leg equipped with the knee prosthesis completely touches the ground, when the user steps with the other leg, the weight of the user is pressed on the connecting head 130, the connecting head 130 presses the top of the knee upper body 100, so that the upper surface of the compression gap 120 of the knee upper body 100 is pressed downward, so that the locking clamping column 140 in the locking hole tightly presses the pivot shaft 210, so that the pivot shaft 210 cannot rotate, thereby ensuring the stability of the knee prosthesis.

[0033] Wherein, through the setting of the adjusting bolt 160, the locking clamping column 140 can adjust the pressing force on the pivot shaft 210 according to the different weights of the user, so that the knee prosthesis can ensure the stability when used by users with different weights.

[0034] Wherein, the bearing is arranged between the pivot shaft 210 and the pivot hole 101, which ensures the smoothness of the knee upper body 100 and the knee lower body 200 when the user steps.

[0035] Referring to Figures 1-7 The hydraulic rod 300 includes a hydraulic shell 310, a plunger 320, a plunger rod 330 and a cylinder sleeve 340. The cylinder sleeve 340 is inserted into the hydraulic shell 310, the plunger 320 is slidingly arranged in the cylinder sleeve 340, one end of the plunger rod 330 is fixedly connected with the plunger 320, and the other end of the plunger rod 330 extends out of the hydraulic shell 310 and is connected with the biasing shaft 110.

[0036] The hydraulic shell 310 includes a cylinder body 311 and an upper cover 312. The upper cover 312 is rotatably and sealingly arranged on the cylinder body 311, and the plunger rod 330 is slidingly sealed with the upper cover 312.

[0037] The first cavity 410 is formed between the plunger 320 and the cylinder body 311, the second cavity 420 is formed between the plunger 320 and the upper cover 312, the third cavity 430 is formed between the plunger 320 and the cylinder sleeve 340, and the fourth cavity 440 is formed between the cylinder sleeve 340 and both the cylinder body 311 and the upper cover 312; the plunger 320 is provided with a first horizontal hole 321 and a first vertical hole 322, the first horizontal hole 321 is used for connecting the third cavity 430 and the first vertical hole 322, the lower end of the first vertical hole 322 is provided with a first one-way valve 510 for one-way conduction from the first vertical hole 322 to the first cavity 410, and the upper end of the first vertical hole 322 is provided with a second one-way valve 520 for one-way conduction from the first vertical hole 322 to the second cavity 420; the cylinder sleeve 340 is provided with a plurality of second vertical holes 342 for connecting the second cavity 420 and the fourth cavity 440, and the cylinder sleeve 340 is provided with a second horizontal hole 341 for connecting the first cavity 410 and the fourth cavity 440.

[0038] The bottom inner ring of the upper cover 312 is provided with an inclined annular flow channel 313, and the depth of the inclined annular flow channel 313 gradually increases from zero; the side wall of the cylinder body 311 is provided with a speed regulation channel for connecting the first cavity 410 and the fourth cavity 440, and the speed regulation channel corresponds to the inclined annular flow channel 313. By arranging the inclined annular flow channel 313, the flow rate of the liquid discharged from the speed regulation channel can be adjusted, so that the extension and retraction rate of the hydraulic rod 300 can be adjusted, so that the rotation speed of both the upper body 100 and the lower body 200 of the knee joint can be adjusted, and then the user's pace can be adjusted. By arranging the inclined annular flow channel 313, the knee joint prosthesis can adapt to users of different heights and body shapes, so that the user can adjust the pace to suit himself.

[0039] When the plunger 320 slides downward, the plunger 320 can block the second horizontal hole 341, so that the second horizontal hole 341 is located in the third cavity 430.

[0040] Specifically, when the user lifts the limb wearing the prosthesis to take a step, the user lifts the knee joint prosthesis, the plunger rod 330 extends outward relative to the hydraulic shell 310, and the plunger rod 330 drives the plunger 320 to move upward, as shown in Figure 3As shown, at this time, the plunger 320 blocks the second horizontal hole 341 on the cylinder sleeve 340, the plunger 320 extrudes the hydraulic oil in the second cavity 420, the hydraulic oil enters into the fourth cavity 440 from the second cavity 420 via the second vertical hole 342 of the cylinder sleeve 340, then the hydraulic oil enters into the third cavity 430 from the fourth cavity 440 via the second horizontal hole 341 of the cylinder sleeve 340, then the hydraulic oil enters into the first vertical hole 322 from the third cavity 430 via the first horizontal hole 321 of the plunger 320, then enters into the first cavity 410 via the first one-way valve 510 arranged in the first vertical hole 322, in addition, the hydraulic oil in the fourth cavity 440 can enter into the speed regulation channel from the inclined annular flow channel 313, then enters into the first cavity 410 via the speed regulation channel; see Figure 4 As shown, at this time, the plunger 320 blocks the second horizontal hole 341 on the cylinder sleeve 340, the plunger 320 extrudes the hydraulic oil in the second cavity 420, the hydraulic oil enters into the fourth cavity 440 from the second cavity 420 via the second vertical hole 342 of the cylinder sleeve 340, then the hydraulic oil enters into the third cavity 430 from the fourth cavity 440 via the second horizontal hole 341 of the cylinder sleeve 340, then the hydraulic oil enters into the first vertical hole 322 from the third cavity 430 via the first horizontal hole 321 of the plunger 320, then enters into the first cavity 410 via the first one-way valve 510 arranged in the first vertical hole 322, in addition, the hydraulic oil in the fourth cavity 440 can enter into the speed regulation channel from the inclined annular flow channel 313, then enters into the first cavity 410 via the speed regulation channel; see

[0041] Then, see Figure 5 As shown, when the affected limb wearing the knee prosthesis falls to the ground, at this time, the plunger rod 330 is withdrawn inward relative to the hydraulic shell 310, the plunger rod 330 drives the plunger 320 to move downward, at this time, the plunger 320 does not block the second horizontal hole 341 on the cylinder sleeve 340, the plunger 320 extrudes the hydraulic oil in the first cavity 410, the hydraulic oil enters into the fourth cavity 440 from the first cavity 410 via the second horizontal hole 341 of the cylinder sleeve 340, then the hydraulic oil enters into the second cavity 420 from the fourth cavity 440 via the second vertical hole 342 of the cylinder sleeve 340, in addition, the hydraulic oil in the first cavity 410 can enter into the inclined annular flow channel 313 from the speed regulation channel, then enters into the second cavity 420 via the second vertical hole 342 of the cylinder sleeve 340; see Figure 6As shown, at this time, the plunger 320 is lowered to a certain height so that the plunger 320 blocks the second horizontal hole 341 on the cylinder sleeve 340, so that the hydraulic oil in the first cavity 410 enters the inclined annular flow channel 313 through the speed regulating channel, and then flows from the inclined annular flow channel 313 into the fourth cavity 440, and then quickly enters the third cavity 430 from the fourth cavity 440 through the second horizontal hole 341 of the cylinder sleeve 340, and then enters the second cavity 420 from the third cavity 430 through the second one-way valve 520; The above process is the whole process of the knee prosthesis of the user after stepping and kicking the leg to contact the support on the ground, so that the prosthesis can swing smoothly, and then when the user steps steadily, the user's weight is pressed on the connecting head 130, and then the compression seam 120 is compressed to lock the clamping column 140, so that the clamping column 140 tightly presses the pivot shaft 210, ensures that the upper body 100 and the lower body 200 of the knee joint are relatively fixed, and improves the stability of the knee prosthesis. In addition, the user can rotate the cylinder body 311 and the upper cover 312, so that the speed regulating channel corresponds to different positions of the inclined annular flow channel 313, so as to adjust the flow rate of the hydraulic oil, so as to adjust the angular velocity of the swing of the upper body 100 and the lower body 200 of the knee joint, and then adjust the step length.

[0042] The embodiment provides a lower limb prosthesis, which comprises a knee prosthesis.

[0043] Specifically, the lower limb prosthesis provided by the embodiment has the advantages described above compared with the prior art, and details are not repeated here.

[0044] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A knee joint prosthesis, characterized in that, include: Upper knee joint (100), lower knee joint (200), and hydraulic rod (300); The upper part of the knee joint (100) is pivotally connected to the lower part of the knee joint (200) via a pivot shaft (210); An offset pivot (110) is provided on the upper body (100) of the knee joint. One end of the hydraulic rod (300) is pivotally connected to the lower body (200) of the knee joint, and the other end is pivotally connected to the offset pivot (110), so that when the upper body (100) of the knee joint rotates relative to the lower body (200) of the knee joint, the hydraulic rod (300) can be driven to extend and retract. The upper body of the knee joint (100) is provided with a pivot hole (101) for installing the pivot shaft (210). A compression seam (120) is provided on the upper body of the knee joint (100), and the compression seam (120) is located above the pivot hole (101). A connector (130) for connecting the patient's leg is provided at the top of the upper body of the knee joint (100). A first threaded connection hole for installing the connector (130) is provided on the upper body of the knee joint (100). A locking hole is provided in the first threaded connection hole. The locking hole passes through the compression seam (120) and communicates with the pivot hole (101). A locking pin (140) is provided in the locking hole. The locking pin (140) can abut against the pivot shaft (210). A locking member (150) for restricting the locking pin (140) is provided at the top of the locking hole.

2. The knee prosthesis according to claim 1, characterized in that, An adjusting bolt (160) is provided on the upper part of the knee joint (100). The adjusting bolt (160) can be inserted downward from the top of the upper part of the knee joint (100). The adjusting bolt (160) can be inserted into the compression gap (120). When the upper part of the knee joint (100) is not under pressure, there is a gap between the adjusting bolt (160) and the lower surface of the compression gap (120).

3. The knee prosthesis according to claim 2, characterized in that, The number of the adjusting bolts (160) is multiple, and the multiple adjusting bolts (160) are disposed on the outer periphery of the upper body (100) of the knee joint.

4. The knee prosthesis according to claim 1, characterized in that, The hydraulic rod (300) includes a hydraulic housing (310), a plunger (320), a plunger rod (330), and a cylinder liner (340). The cylinder liner (340) is inserted into the hydraulic housing (310), the plunger (320) is slidably disposed in the cylinder liner (340), one end of the plunger rod (330) is fixedly connected to the plunger (320), and the other end of the plunger rod (330) extends out of the hydraulic housing (310) and is connected to the offset shaft (110).

5. The knee prosthesis according to claim 4, characterized in that, The hydraulic housing (310) includes a cylinder (311) and a top cover (312). The upper cover (312) is rotatably and sealingly disposed on the cylinder body (311), and the plunger rod (330) slides and seals with the upper cover (312).

6. The knee prosthesis according to claim 5, characterized in that, A first cavity (410) is formed between the plunger (320) and the cylinder (311), a second cavity (420) is formed between the plunger (320) and the upper cover (312), a third cavity (430) is formed between the plunger (320) and the cylinder liner (340), and a fourth cavity (440) is formed between the cylinder liner (340) and both the cylinder (311) and the upper cover (312). The plunger (320) is provided with a first horizontal hole (321) and a first vertical hole (322). The first horizontal hole (321) is used to connect the third cavity (430) and the first vertical hole (322). The lower end of the first vertical hole (322) is provided with a first one-way valve (510) for unidirectional flow from the first vertical hole (322) to the first cavity (410). The upper end of the first vertical hole (322) is provided with a second one-way valve (520) for unidirectional flow from the first vertical hole (322) to the second cavity (420). The cylinder liner (340) has a plurality of second vertical holes (342) for connecting the second cavity (420) and the fourth cavity (440), and the cylinder liner (340) has a second horizontal hole (341) for connecting the first cavity (410) and the fourth cavity (440).

7. The knee prosthesis according to claim 6, characterized in that, The bottom inner ring of the top cover (312) is provided with an inclined annular flow channel (313), the depth of which gradually increases from zero; The cylinder body (311) has a speed regulating channel on its side wall for connecting the first cavity (410) and the fourth cavity (440), and the speed regulating channel corresponds to the inclined annular flow channel (313).

8. The knee prosthesis according to claim 7, characterized in that, As the plunger (320) slides down, the plunger (320) can block the second horizontal hole (341) so that the second horizontal hole (341) is located within the third cavity (430).

9. The knee prosthesis according to any one of claims 1-8, characterized in that, A bearing is provided between the pivot shaft (210) and the pivot hole (101).

10. A lower limb prosthesis, characterized in that, Includes the knee prosthesis as described in any one of claims 1-9.

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