CN101561358B - Artificial knee joint prosthesis simulated motion tester - Google Patents
Artificial knee joint prosthesis simulated motion tester Download PDFInfo
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- CN101561358B CN101561358B CN2009100511716A CN200910051171A CN101561358B CN 101561358 B CN101561358 B CN 101561358B CN 2009100511716 A CN2009100511716 A CN 2009100511716A CN 200910051171 A CN200910051171 A CN 200910051171A CN 101561358 B CN101561358 B CN 101561358B
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Abstract
The invention relates to an artificial knee joint prosthesis simulated motion tester, comprising a thighbone prosthesis, a tibial plateau, an AP driven lever, an AP synchronous pulley system, a motor and an IE cam. The thighbone prosthesis is arranged on the tibia platform that is arranged on a driven wheel of an IE synchronous pulley system, the AP driven lever passes through the tibia platform and then is connected with an AP cam that is connected with the driven wheel of the AP synchronous pulley system, and the motor is coaxially connected with a driving wheel of the AP synchronous pulley system. The driving wheel of the AP synchronous pulley system is connected with an FE cam that is coaxially connected with the IE cam, the FE cam is connected with an FE driven lever system that is connected with an FE rotating disk. The FE rotating disk is connected with a bevel gear pair that is connected with the thighbone prosthesis, the IE cam is connected with the IE driven lever system thatis connected with an IE rotating disk, and the IE rotating disk is coaxially connected with the driving wheel of the IE synchronous pulley system. Three motions in the process of simulating the motio ns of knee joint change along with time, and the tester performs longitudinal extrusion loading and has a simple structure and a low manufacturing cost.
Description
Technical field
The present invention relates to a kind of equipment of technical field of medical instruments, specifically is a kind of artificial knee joint prosthesis simulated motion tester.
Background technology
People's joint frictional behaviour is good, friction factor is minimum and almost do not have wearing and tearing, but reasons such as osteoarthritis or accident have a strong impact on the normal use in joint, China osteoarthritis patient reaches 3,600 ten thousand～4,000 ten thousand at present, and wherein 100～1,500,000 needs of patients carry out the prosthetic replacement.Artificial joint material commonly used mainly contains high-molecular polythene, vitallium, pottery etc.The artificial joint prosthesis made from these materials is used for substituting the pathology joint, realize rebuilding function of joint, releasing arthralgia, orthotic joint deformity, keep many-sided effects such as stability of joint and reparation limbs length, improved the patient's of various bone and joint diseases quality of life.Technology is the most ripe and use maximum to be artificial hip joint and artificial knee joint, to account for 90% of whole prosthetic replacement's cases greatly.Human knee joint has six kinds of mode of motion according to three axles of three dimensions, wherein 3 kinds be rotation (interior outward turning, flexing is stretched, in turn up), 3 kinds is displacement (front and back displacements, interior lateral displacement are vertically separated and pushed).These mode of motion are not independent appearance, but the merging appearance, promptly the motion of knee joint pattern is the complicated multivariant motor pattern that has flexing, rolling, slip, sidesway and the rotation of axle position concurrently.
After carrying out joint replacement, artificial knee joint will be realized the kneed multiple motor pattern of natural human, there are many group frictional contact surfaces in the motion, as condyle of femur and artificial meniscus interface, artificial meniscus and artificial shin bone interface, condyle of femur and last femur interface and artificial shin bone and following shin bone etc.The rubbing action that exists on these interfaces in the daily use of joint prosthesis will produce wearing and tearing in various degree, the wearing and tearing of UHMWPE can produce many wear particles in the artificial knee joint prosthesis, make the patient of prosthetic knee implant that the osteolysis phenomenon take place, cause serious problems such as joint prosthesis destroys, gets loose, and finally cause joint replacement displacement failure in late period.The bio-tribology behavior of joint prosthesis directly influences the postoperative curative effect of replacement joint, just need carry out the skimulated motion experimental study to joint prosthesis before clinical practice.In order to make artificial knee joint simulation test condition unified, so that the contrast of dissimilar artificial knee joints and evaluation, the ISO tissue has proposed the standard at the skimulated motion of artificial knee joint, be respectively ISO14243-1:2002 and ISO14243-3:2004, the simulation test machine that occurs mostly adopts one of above-mentioned two standards at present.
Find through literature search prior art, Oonishi H etc. are at " The Journal ofArthroplasty " (joint replacement magazine, 2008) (pottery compares with cobalt chrome molybdenum femoral prosthesis " the Ceramic Versus Cobalt-Chrome Femoral Components:Wear of Polyethylene Insert in Total KneeProsthesis " that delivers on: the wearing and tearing of tygon platform in the complete knee joint), the knee joint simulation test machine of AMTI company is adopted in this test, this experimental machine has 6 working positions, can move to knee according to ISO14243-1 and simulate.Ellison P etc. are at " Journal of Biomechanics " (biomechanics magazine, 2008,41 (7): deliver " In vitro simulation andquantification of wear within the patellofemoral joint replacement " (the in-vitro simulated and wearing and tearing of patellofemoral joint displacement quantize) 1407-1416), the MTS of Material Testing Machine manufacturer has two kinds of testing machines at the knee joint simulation test, be respectively single station of MTS Bionix and multistation knee simulator, it can simulate the stressed and motion of knee joint.Single station knee simulator can only carry out the test of a joint sample, it is to install motor additional to realize that a plurality of motions and mechanics load on the basis of the pull and torsion test machine of MTS, the servo loading of motor is adopted in wherein interior inner rotary, motion, and hydraulic loaded is adopted in front and back displacement and vertical extruding; Multistation knee simulator once can carry out the test of a plurality of joints sample, and it need not the cooperation of pull and torsion test machine, adopts and the identical load mode of single station knee simulator.Existing knee joint simulation test machine is to adopt motor servocontrol and hydraulic loaded technology to realize the simulation that the knee joint sample is moved, and needs a plurality of motors, sensor and circuit, complex structure.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of artificial knee joint prosthesis simulated motion tester artificial knee joint prosthesis exercise test machine is provided, flexing in the simulation motion of knee joint process is stretched, interior inner rotary and three kinds of motions of front and back displacement over time, vertically push loading simultaneously, need not a plurality of motors, sensor and circuit, simple in structure, cost is low.
The present invention is achieved by the following technical solutions, the present invention includes: femoral prosthesis, tibial plateau, the AP follower lever, AP synchronous pulley system, motor, the IE cam, the FE cam, the driven leverage of IE, the IE rotating disk, the driven leverage of FE, the FE rotating disk, bevel gear pair, IE synchronous pulley system and AP cam, femoral prosthesis is arranged on the tibial plateau, it is on the engaged wheel that tibial plateau is arranged on the IE synchronous pulley, the AP follower lever passes tibial plateau and is connected with the AP cam, the AP cam is that engaged wheel is connected with the AP synchronous pulley, motor and AP synchronous pulley owner coaxial connection of driving wheel, AP synchronous pulley owner driving wheel is connected with the FE cam, the FE cam is connected with the IE cam is coaxial again, the FE cam is connected with the driven leverage of FE in addition, the driven leverage of FE connects the FE rotating disk, the FE rotating disk connects bevel gear pair, bevel gear pair is connected with femoral prosthesis, connect the driven leverage of IE on the IE cam in addition, the driven leverage of IE connects the IE rotating disk, the coaxial connection of driving wheel that IE rotating disk and IE synchronous pulley are.
The driven leverage of described IE comprises IE connecting rod and IE fork, and IE connecting rod one end connects the IE cam, and the other end connects the IE fork, and the IE fork is connected with the IE rotating disk again.
The driven leverage of described FE comprises FE connecting rod and FE fork, and FE connecting rod one end connects the FE cam, and the other end connects the FE fork, and the FE fork is connected with the FE rotating disk again.
Described bevel gear pair comprises drive bevel gear, driven wheel of differential, and drive bevel gear is connected with the FE rotating disk is coaxial, drive bevel gear and driven wheel of differential engagement, and driven wheel of differential is connected with femoral prosthesis.
Described IE synchronous pulley is that engaged wheel is arranged on the tibial prosthesis support, and the tibial prosthesis support is connected with electronic cylinder force application rod, and electronic cylinder force application rod is connected with electronic cylinder.Vertically extruding loads and adopts servo electric jar that tibial prosthesis is applied.
By the shape or the kinematic parameter of control cam, synchronous pulley system and linkage assembly etc., can simulate kneed different motion form.
Compared with prior art, the present invention has following beneficial effect: adopt cam, leverage, bevel gear mechanism and three groups of mechanisms combining with mechanism synchronously realize in the motion of knee joint processes that time dependent flexing is stretched, interior inner rotary and three kinds of motions of front and back displacement, adopt servo electric jar vertically to push loading, the testing machine structure that this technical scheme makes is simple more and cost is lower.
Description of drawings
Fig. 1 testing machine mechanism principle figure.
Fig. 2 knee-joint prosthesis mounting portion synoptic diagram.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As Fig. 1, shown in 2, present embodiment comprises: femoral prosthesis 1, tibial plateau 2, AP follower lever 3, AP synchronous pulley system, motor 7, IE cam 11, FE cam 9, the driven leverage 12 of IE, IE rotating disk 16, the driven leverage 10 of FE, FE rotating disk 13, bevel gear pair 14, IE synchronous pulley system and AP cam 18, femoral prosthesis 1 is arranged on the tibial plateau 2, it is on the engaged wheel 4 that tibial plateau 2 is arranged on the IE synchronous pulley, AP follower lever 3 passes tibial plateau 2 and is connected with AP cam 18, AP cam 18 is that engaged wheel 6 is connected with the AP synchronous pulley, motor 7 and 8 coaxial connections of AP synchronous pulley owner driving wheel, AP synchronous pulley owner driving wheel 8 is connected with FE cam 9, FE cam 9 again with 11 coaxial connections of IE cam, FE cam 9 is connected with the driven leverage 10 of FE in addition, the driven leverage 10 of FE connects FE rotating disk 13, FE rotating disk 13 connects bevel gear pair 14, bevel gear pair 14 is connected with femoral prosthesis 1, connect the driven leverage 12 of IE on the IE cam 11 in addition, the driven leverage of IE 12 connects IE rotating disks 16,17 coaxial connections of driving wheel that IE rotating disk 16 and IE synchronous pulley are.
The driven leverage 12 of described IE comprises IE connecting rod and IE fork, and IE connecting rod one end connects IE cam 11, and the other end connects the IE fork, and the IE fork is connected with IE rotating disk 16 again.
The driven leverage 10 of described FE comprises FE connecting rod and FE fork, and FE connecting rod one end connects FE cam 9, and the other end connects the FE fork, and the FE fork is connected with FE rotating disk 13 again.
Described bevel gear pair 14 comprises drive bevel gear, driven wheel of differential, drive bevel gear and 13 coaxial connections of FE rotating disk, and drive bevel gear and driven wheel of differential engagement, driven wheel of differential is connected with femoral prosthesis 1.
Under motor 7 drives, it is that engaged wheel 6 rotates that AP synchronous pulley owner driving wheel 8 drives the AP synchronous pulley by belt, the AP synchronous pulley is that engaged wheel 6 is coaxial with AP cam 18, the AP synchronous pulley is that the rotation of engaged wheel 6 is converted to 18 rotations of AP cam, AP cam 18 rotates promotion AP follower lever 3 and reciprocatingly moves, tibial prosthesis 2 is installed on the AP follower lever 3, so tibial prosthesis 2 is just done the front and back shift movement with AP follower lever 3.
Under motor 7 drove, FE cam 9 rotated, and the FE connecting rod that FE cam 9 promotes the driven leverage 10 of FE is done and moved up and down; The FE connecting rod is connected with the FE fork, the FE connecting rod move up and down the reciprocally swinging that is converted to the FE fork; The FE fork is connected with FE rotating disk 13, and FE rotating disk 13 is followed the FE fork and done reciprocally swinging together; The fastening connection in drive bevel gear lower end of FE rotating disk 13 and bevel gear pair 14, the reciprocally swinging of FE rotating disk 13 is converted to the crankmotion of drive bevel gear, drive bevel gear drives driven wheel of differential again and back and forth rotates, driven wheel of differential drives femoral prosthesis 1 and does crankmotion, realizes the flexing of femoral prosthesis 1-stretch motion.
Under motor 7 drove, IE cam 11 rotated, and the IE connecting rod that IE cam 11 promotes the driven leverage 12 of IE is done and moved up and down; The IE connecting rod is connected with the IE fork, the IE connecting rod move up and down the reciprocally swinging that is converted to the IE fork; The IE fork is connected with IE rotating disk 16, and IE rotating disk 16 is followed the IE fork and done reciprocally swinging together; Because IE rotating disk 16 and the 17 fastening connections of IE synchronous pulley owner driving wheel, the swing of IE rotating disk 16 as a result is converted to the crankmotion of IE synchronous pulley owner driving wheel 17, and it is that engaged wheel 4 back and forth rotates that IE synchronous pulley owner driving wheel 17 drives the IE synchronous pulley by belt; IE is with engaged wheel 4 and tibial prosthesis 2 fastening connections synchronously, so IE is with engaged wheel 4 to drive tibial prosthesis 2 to do crankmotion, realize rotatablely moving inside and outside the tibial prosthesis 2 synchronously.
Described IE synchronous pulley is that engaged wheel 4 is arranged on the tibial prosthesis support 19, and tibial prosthesis support 19 is connected with electronic cylinder force application rod 15, and electronic cylinder force application rod 15 is connected with electronic cylinder 5.IE is with engaged wheel 4 to be supported by bearing 20 by electronic cylinder force application rod 15 synchronously, and 21 couples of IE of support cylinder are with engaged wheel 4 to position synchronously.Tibial prosthesis 2 is with engaged wheel 4 fixing by tibial prosthesis support 19 with IE synchronously.
When vertically extruding loaded, electronic cylinder 5 connects electronic cylinder force application rod 15 made it mobile, and process bearing 20 is to tibial prosthesis support 19 imposed loads in electronic cylinder force application rod 15 moving process; Tibial prosthesis 2 is installed on the tibial prosthesis support 19, and vertical extruding that the load that tibial prosthesis support 19 bears is converted into femoral prosthesis 1 and tibial prosthesis 2 loads.
According to time dependent flexing in the ISO14243-3:2004 standard stretch, three kinds of motions of interior inner rotary and front and back displacement and vertically push loading curve, design the controlled variable of three groups of motions and servo electric jar, this testing machine can be realized the simulation test requirement of this standard.
Claims (4)
1. artificial knee joint prosthesis simulated motion tester, it is characterized in that, comprise: femoral prosthesis, tibial plateau, the AP follower lever, AP synchronous pulley system, motor, the IE cam, the FE cam, the driven leverage of IE, the IE rotating disk, the driven leverage of FE, the FE rotating disk, bevel gear pair, IE synchronous pulley system and AP cam, femoral prosthesis is arranged on the tibial plateau, it is on the engaged wheel that tibial plateau is arranged on the IE synchronous pulley, the AP follower lever passes tibial plateau and is connected with the AP cam, the AP cam is that engaged wheel is connected with the AP synchronous pulley, motor and AP synchronous pulley owner coaxial connection of driving wheel, AP synchronous pulley owner driving wheel is connected with the FE cam, the FE cam is connected with the IE cam is coaxial again, the FE cam is connected with the driven leverage of FE in addition, the driven leverage of FE connects the FE rotating disk, the FE rotating disk connects bevel gear pair, bevel gear pair is connected with femoral prosthesis, connect the driven leverage of IE on the IE cam in addition, the driven leverage of IE connects the IE rotating disk, the coaxial connection of driving wheel of IE rotating disk and IE synchronous pulley system, the IE synchronous pulley is that engaged wheel is arranged on the tibial prosthesis support, the tibial prosthesis support is connected with electronic cylinder force application rod, and electronic cylinder force application rod is connected with electronic cylinder.
2. artificial knee joint prosthesis simulated motion tester according to claim 1 is characterized in that, the driven leverage of described IE comprises IE connecting rod and IE fork, and IE connecting rod one end connects the IE cam, and the other end connects the IE fork, and the IE fork is connected with the IE rotating disk again.
3. artificial knee joint prosthesis simulated motion tester according to claim 1 is characterized in that, the driven leverage of described FE comprises FE connecting rod and FE fork, and FE connecting rod one end connects the FE cam, and the other end connects the FE fork, and the FE fork is connected with the FE rotating disk again.
4. artificial knee joint prosthesis simulated motion tester according to claim 1, it is characterized in that, described bevel gear pair comprises drive bevel gear, driven wheel of differential, drive bevel gear is connected with the FE rotating disk is coaxial, drive bevel gear and driven wheel of differential engagement, driven wheel of differential is connected with femoral prosthesis.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100511716A CN101561358B (en) | 2009-05-14 | 2009-05-14 | Artificial knee joint prosthesis simulated motion tester |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100511716A CN101561358B (en) | 2009-05-14 | 2009-05-14 | Artificial knee joint prosthesis simulated motion tester |
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| CN101561358A CN101561358A (en) | 2009-10-21 |
| CN101561358B true CN101561358B (en) | 2010-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102854132A (en) * | 2012-09-20 | 2013-01-02 | 北京航空航天大学 | Knee patellofemoral joint mechanical testing tester |
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| CN102247229A (en) * | 2011-04-08 | 2011-11-23 | 北京林业大学 | Active and passive joint prosthesis |
| CN105223010B (en) * | 2015-10-12 | 2017-07-11 | 中国矿业大学 | A kind of parallel bionical knee hip joint tester |
| CN106448400B (en) * | 2016-10-12 | 2022-09-20 | 中南大学 | Human knee joint bone friction simulation test device |
| CN106596313B (en) * | 2017-01-05 | 2019-02-19 | 中国矿业大学 | A kind of test method and device for simulating the friction of joint prosthesis moving along multiple travels |
| CN107764675A (en) * | 2017-09-11 | 2018-03-06 | 湖北阳超机电科技有限公司 | A kind of knee joint abrasion tester |
| CN110082236A (en) * | 2019-03-22 | 2019-08-02 | 贵州大学 | A kind of imitative human body knee joint friction wear testing machine of cam load |
| CN110411880B (en) * | 2019-07-25 | 2022-06-10 | 成都海蓉特种纺织品有限公司 | Novel wear-resisting test device |
| CN112378634B (en) * | 2020-11-11 | 2022-06-10 | 德检(江苏)检测技术有限公司 | Special frock of artifical knee joint prosthesis constraining force test |
| CN112858046B (en) * | 2021-01-15 | 2024-01-12 | 大连医科大学附属第一医院 | Intensity detection equipment and detection method for artificial bone for orthopedic operation |
| CN114112337B (en) * | 2021-10-22 | 2024-07-02 | 武汉奥绿新生物科技股份有限公司 | Device for simulating biomechanics during knee joint straightening and loading method |
| CN115628887A (en) * | 2022-12-22 | 2023-01-20 | 四川大学华西医院 | Knee joint prosthesis fine motion detection device |
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2009
- 2009-05-14 CN CN2009100511716A patent/CN101561358B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854132A (en) * | 2012-09-20 | 2013-01-02 | 北京航空航天大学 | Knee patellofemoral joint mechanical testing tester |
| CN102854132B (en) * | 2012-09-20 | 2014-06-04 | 北京航空航天大学 | Knee patellofemoral joint mechanical testing tester |
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| CN101561358A (en) | 2009-10-21 |
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