CN101984338B - Multiaxial artificial joints tester - Google Patents
Multiaxial artificial joints tester Download PDFInfo
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- CN101984338B CN101984338B CN2010105018342A CN201010501834A CN101984338B CN 101984338 B CN101984338 B CN 101984338B CN 2010105018342 A CN2010105018342 A CN 2010105018342A CN 201010501834 A CN201010501834 A CN 201010501834A CN 101984338 B CN101984338 B CN 101984338B
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Abstract
The invention discloses a multiaxial artificial joints tester, which comprises a timber frame. A central support, which is equipped with a cambered seat ring, is arranged at the middle of the timber frame. A spherical base, which is arranged on the cambered seat ring, is equipped with a solution basin. A ball cup is sleeved in the solution basin. A moving platform is fixed to the rim of the solution basin. A plurality of upper spherical hinges are disposed at the bottom of the moving platform. The bottom plate is equipped with a plurality of lower spherical hinges corresponding with the upper spherical hinges. A electric cylinder is obliquely connected between the upper spherical hinges and the lower spherical hinges. The cotyle matching the articular head is disposed above the ball cup. A guide block is disposed above the cotyle. A tension transducer is connected between the cotyle and the guide block. The guide block is disposed inside a guide sleeve. The guide sleeve is equipped with a hydraulic cylinder. The piston rod of the hydraulic cylinder is connected with the guide block. A heating device is disposed inside the solution basin. The top board is equipped with a temperature controller. The tester provided by the invention has the advantages of simple and compact structure, good simulation effect, convenient operation and low cost.
Description
Technical field
The present invention relates to a kind of joint prosthesis testing machine, especially a kind ofly be applicable to simulation human hip actual motion, artificial joint material is carried out friction-wear test fountain type joint prosthesis testing machine.
Background technology
Along with human society steps into the aging stage, the various joint diseases relevant with advanced age like illnesss such as thigh fracture, arthritis, will take place in a large number, and therefore the demand to joint prosthesis also can increase day by day.At present, existing about 3,000 ten thousand people in the whole world have implanted joint prosthesis, and annual replacement amount is about 2,000,000 examples.Joint prosthesis is stressed in vivo to be quite abominable, like artificial hip joint, will stand about 3.6 * 10 every year
6The inferior load impacting and the wearing and tearing that possibly be several times as much as the human body body weight.Simultaneously because normal person's bone is constantly adjusted its external form in the heterogeneous equilibrium of osteoblast and osteophage; Chip from the prosthese friction surface gathers at juxtra-articular; Can cause the osteophage in the health to increase, break the balance between osteophage and the Gegenbaur's cell, make prosthetic loosening; Therefore, wearing and tearing and wear particle are sent out and are still the subject matter that influences the artificial hip joint permanance.For studying this problem; The engineering staff adopts the joint prosthesis testing machine that artificial joint material is carried out friction-wear test; Friction and wear behavior through the analysis of experimental data artificial joint material; To improve the service property (quality) of joint prosthesis, prolong its clinical life-span and alleviate the patient suffering and have important practical significance.
Simulation test machine is broadly divided into three types: (1) balance staff type (Biaxial-Hip-Simulator) according to the difference of institute's skimulated motion mode at present; (2) pin dish-type (Pin-on-Disk); (3) fountain type (Multi-Hip-Simulator).Wherein the balance staff type mainly is to rely on the relative motion between pedestal and the inclined-plane base to simulate the wobbling action of hip joint three Different Plane, is early stage testing machine; Pin dish-type friction wear testing machine is to carry out friction-wear test with sliding contacting mode; Through disk and be processed into that formed relative motion comes the frictional behaviour of research material and the greasy property of synovia between the test specimen of pin shape; It is present joint prosthesis tribology testing machine commonly used; Though these two types of testing machines can be simulated the human body hip joint motion, the actual motion mode difference of its analog form and human hip is bigger.Fountain type mainly is through being that formed single motion is synthesized and simulated artificial hip joint motion form with disalignment; The actual motion mode of its analog form and human hip is comparatively approaching; The fountain type artificial hip joint simulated experiment machine of making like Britain Leeds university and Durham university etc.; But its complex structure, cost is high.Simultaneously, discover the domestic relevant report of not seeing this type of simulation tester for artificial hip joint development aspect as yet through extensive investigation.
Summary of the invention
Technical matters: the objective of the invention is to overcome the weak point of prior art, provide a kind of simple in structure, cost is low, can realize the fountain type joint prosthesis simulated experiment machine of the multidirectional compound motion of cross-like.
Technical scheme: for realizing above-mentioned purpose; Fountain type joint prosthesis testing machine of the present invention comprises the frame support that is connected and composed by top board, pillar and base plate, and the middle part of frame support is provided with the center bearing bracket that is fixed on the base plate; Center bearing bracket is provided with the cambered surface seat ring; The cambered surface seat ring is provided with the sphere pedestal that matches with its cambered surface, and the sphere pedestal is provided with bottom setting-in solution basin within it, is set with the ball cup that ball and socket joint is set in the solution basin; Be fixed with moving platform on the basin edge of solution basin; The bottom of moving platform is provided with a plurality of spherical hinges of going up, and base plate is provided with and the corresponding a plurality of spherical hinges down of last spherical hinge, tilts to be connected with electronic cylinder between last spherical hinge and the following spherical hinge; The ball cup top is provided with the cotyla that matches with ball and socket joint; The cotyla top is provided with orienting lug; Be connected with pulling force sensor between cotyla and the orienting lug, orienting lug is located in the orienting sleeve, and orienting sleeve is fixed on the top board through the cylinder register pin; Orienting sleeve is provided with the hydraulic cylinder that is fixed on the top board top, and the piston rod of hydraulic cylinder is connected with orienting lug; Be provided with heating arrangement in the solution basin, be located at the temperature controller that is connected with temperature sensor on the top board.
Describedly a plurality ofly go up spherical hinge and corresponding a plurality of numbers of spherical hinges down are 2～4 with it; The described following spherical hinge that is fixed on the base plate slopes inwardly about 5 ° along axial line.
Beneficial effect: the suffered load of hip joint when the present invention utilizes hydraulic system that anthropomorphic dummy's walking is provided, and imposed load is detected and feed back through pressure transducer, further revise the load that is applied.Ball cup is the quick change part, the different joint head, and only needing to change different ball cups can be connected with testing machine.The sphere pedestal of thrust bearing is concentric with ball and socket joint, can make ball and socket joint in doing the process of compound motion, and the load on its non-perpendicular direction is zero.Under the off working state, the centre of sphere of the centre of sphere of ball and socket joint and the last ball pivot of electronic cylinder can guarantee the accuracy of skimulated motion in same surface level.Electronic cylinder is connected used following ball pivot with base plate, the 5 ° of installations of tilting can effectively increase the pivot angle of moving platform, can prevent the dead angle simultaneously.Be used to contain its bottom sealing of solution basin of lubricating fluid, can prevent the leakage of biological lubricating fluid.Temperature control part temperature controller, heating arrangement and temperature sensor can make the test temperature of the biological lubricants in the solution basin remain on 37 ± 1 ℃.It is simple in structure, compact, and is easy to operate, and simulate effect is good, and cost is low, can in testing laboratory's environment, correctly simulate the actual motion operating mode of human hip.
Description of drawings
Fig. 1 is the structural representation of fountain type joint prosthesis testing machine of the present invention;
Fig. 2 is a moving platform plan structure synoptic diagram of the present invention.
Among the figure: 1-base plate, 2-pillar, the electronic cylinder of 3-, 4-seat ring, 5-connector, the last spherical hinge of 6-; The 7-moving platform, the last support plate of 8-, 9-cylinder register pin, 10-hydraulic cylinder, 11-orienting sleeve, 12-guider screw; The 13-temperature controller, 14-orienting lug, 15-pillar pulling force sensor, 16-holding screw, 17-cotyla, 18-solution basin; The 19-ball and socket joint, 20-ball cup, 21-holding screw, 22-sphere pedestal, 23-support, spherical hinge under the 24-.
Embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are done further to describe:
Shown in Figure 1; Fountain type joint prosthesis testing machine of the present invention mainly is made up of frame support, electronic cylinder 3, center bearing bracket 23, solution basin 18, moving platform 7, last spherical hinge 6, following spherical hinge 24; Frame support comprise top board 8, with top board 8 corresponding base plates 1, being provided with between the roof and floor its bolt is the pillar 9 of one.The center bearing bracket 23 that base plate 1 middle part of frame support has through screw retention; Three reinforcements have evenly been arranged on the outside of center bearing bracket 23 is vertical; Be embedded with cambered surface seat ring 4 on the center bearing bracket 23, cambered surface seat ring 4 is provided with the sphere pedestal 22 that matches with its cambered surface, and cambered surface seat ring 4 middle parts have the through hole that helps 22 dismountings of sphere pedestal: sphere pedestal 22 is provided with bottom setting-in solution basin 18 within it; Be set with the ball cup 20 that ball and socket joint 19 is set in the solution basin 18; Be fixed with moving platform 7 on the basin edge of solution basin 18, base plate 1 is provided with a plurality of down spherical hinges 24 identical with last spherical hinge 6 numbers, and a plurality of spherical hinges 24 down slope inwardly about 5 ° along axial line.A plurality ofly go up spherical hinges 6 and corresponding a plurality of numbers of spherical hinges 24 down are 2～4 with it, the model of spherical hinge is SRJ024C up and down.Moving platform 7 is triangle, and is as shown in Figure 2, is respectively equipped with one on three angles of its triangle bottom surface and goes up spherical hinge 6; Go up that to tilt to be connected with model between spherical hinge 6 and three the following spherical hinges 24 be that 3, three electronic cylinders 10 of electronic cylinder of GSM30-1002 are equilateral triangle and evenly arrange for three, all cut with scissors to be connected with moving platform 7 with base plate 1 with sphere; Through independent programming Control, but electronic cylinder 3 anthropomorphic dummies' motion frequency, and export corresponding displacement; Thereby drive moving platform 7 and accomplish cross-like compound motion pattern, the sphere hinge 6 that electronic cylinder 3 is connected with base plate 1 is 5 ° of angles with horizontal direction; Can effectively increase the pivot angle of moving platform, the dead angle in can preventing to move simultaneously.Be provided with connector 5 between electronic cylinder 3 piston rods and the last spherical hinge 6; Ball cup 20 tops are provided with the cotyla 17 that matches with ball and socket joint 19; Cotyla 17 tops are provided with orienting lug 14, and being connected with model between cotyla 17 and the orienting lug 14 is the pulling force sensor 15 of MCL-Z5, and two of pulling force sensor 15 is fixed together through holding screw 16 and cotyla 17, orienting lug 14 respectively; Orienting lug 14 is located in the orienting sleeve 11; Orienting sleeve 11 is fixed on the top board 8 through cylinder register pin 9, and orienting sleeve 11 is provided with the hydraulic cylinder 10 that is fixed on top board 8 tops, and the piston rod head of hydraulic cylinder 10 is inlaid in the orienting lug 14; Be fastened together through sunk screw; The periphery that orienting lug 14 matches with orienting sleeve 11 is provided with and has guide groove, and orienting sleeve 11 is provided with the guider screw 12 that stretches in the guide groove, and the guide groove on orienting lug 14 peripheries is accomplished the guide function of hydraulic cylinder external part.Be provided with the heating arrangement that the test temperature that can make the biological lubricants in the solution basin 18 remains on 37 ± 1 ℃ in the solution basin 18, be located at the temperature controller 13 that is connected with temperature sensor on the top board 8.Ball and socket joint 19 is to be threaded on the ball cup 20, and trip bolt 21 plays the anti-rotation effect, ball cup 20 and solution basin 18 transition fit; Solution basin 18 and sphere pedestal 22 transition fit, again through screw retention, solution basin 18 is the bottom surface enclosed construction; Can effectively prevent the leakage of lubricating fluid, sphere pedestal 22 is slidingly matched with seat ring 4, simultaneously; The spherical outside surface centre of sphere of the centre of sphere of ball and socket joint 19 and sphere pedestal 22 is on same position; Can guarantee that in the course of the work the load that hydraulic cylinder applies is just in time passed through the centre of sphere of ball and socket joint 19, and load is zero on non-vertical direction.
Claims (3)
1. fountain type joint prosthesis testing machine; It is characterized in that: it comprises the frame support that is connected and composed by top board (8), pillar (9) and base plate (1); The middle part of frame support is provided with the center bearing bracket (23) that is fixed on the base plate (1), and center bearing bracket (23) is provided with cambered surface seat ring (4), and cambered surface seat ring (4) is provided with the sphere pedestal (22) that matches with its cambered surface; Sphere pedestal (22) is provided with bottom setting-in solution basin (18) within it; Be set with the ball cup (20) that ball and socket joint (19) are set in the solution basin (18), be fixed with moving platform (7) on the basin edge of solution basin (18), the bottom of moving platform (7) is provided with a plurality of spherical hinges (6) of going up; Base plate (1) is provided with and the corresponding a plurality of spherical hinges (24) down of last spherical hinge (6), tilts to be connected with electronic cylinder (3) between last spherical hinge (6) and the following spherical hinge (24); Ball cup (20) top is provided with the cotyla (17) that matches with ball and socket joint (19); Cotyla (17) top is provided with orienting lug (14); Be connected with pulling force sensor (15) between cotyla (17) and the orienting lug (14), orienting lug (14) is located in the orienting sleeve (11), and orienting sleeve (11) is fixed on the top board (8) through cylinder register pin (9); Orienting sleeve (11) is provided with the hydraulic cylinder (10) that is fixed on top board (8) top, and the piston rod of hydraulic cylinder (10) is connected with orienting lug (14); The solution basin is provided with heating arrangement in (18), and top board (8) is provided with the temperature controller (13) that is connected with temperature sensor.
2. fountain type joint prosthesis testing machine according to claim 1 is characterized in that: describedly a plurality ofly go up spherical hinges (6) and corresponding a plurality of spherical hinges (24) down are 2～4 with it.
3. fountain type joint prosthesis testing machine according to claim 1 is characterized in that: the described following spherical hinge (24) that is fixed on the base plate (1) slopes inwardly 5 ° along axial line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105018342A CN101984338B (en) | 2010-09-27 | 2010-09-27 | Multiaxial artificial joints tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105018342A CN101984338B (en) | 2010-09-27 | 2010-09-27 | Multiaxial artificial joints tester |
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| Publication Number | Publication Date |
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| CN101984338A CN101984338A (en) | 2011-03-09 |
| CN101984338B true CN101984338B (en) | 2012-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105018342A Expired - Fee Related CN101984338B (en) | 2010-09-27 | 2010-09-27 | Multiaxial artificial joints tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092238A (en) * | 2015-09-25 | 2015-11-25 | 中国矿业大学 | Multiple-movable-platform parallel-connected hip joint testing machine with wire rope flexible cable transmission |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102319131B (en) * | 2011-09-20 | 2014-03-19 | 北京航空航天大学 | Abrasion test device for tibiofemoral joint of bi-dimensional rotating and bi-dimensional movement synthesized knee replacement prosthesis |
| CN102589998A (en) * | 2012-02-01 | 2012-07-18 | 中国矿业大学 | Parallel type biomimetic hip joint friction-wear test machine |
| CN102680344B (en) * | 2012-05-07 | 2014-03-12 | 北京航空航天大学 | Six-degree-of-freedom parallel and oscillating guide bar mechanism combined knee-replacing prosthesis abrasion tester |
| CN102854132B (en) * | 2012-09-20 | 2014-06-04 | 北京航空航天大学 | Knee patellofemoral joint mechanical testing tester |
| CN102871778B (en) * | 2012-09-29 | 2014-12-31 | 上海大学 | Multi-workbench detecting and experimenting device for artificial hip joint abrasion |
| CN104198295A (en) * | 2014-09-24 | 2014-12-10 | 北京铁五院工程机械有限公司 | Large-tonnage pressure test bed |
| CN104460338A (en) * | 2014-10-22 | 2015-03-25 | 中国矿业大学 | Four-freedom-degree parallel bionic hip joint tester control system and method |
| CN104458471B (en) * | 2014-12-12 | 2017-04-12 | 上海大学 | Multi-station biomedical implant material friction testing device |
| CN105067466B (en) * | 2015-08-04 | 2017-09-26 | 中国矿业大学 | A kind of bionical temperature control equipment of hip joint tester in parallel and method |
| CN105159233B (en) * | 2015-08-04 | 2017-11-03 | 中国矿业大学 | A kind of control system and its method of double acting platform parallel connected bionic hip joint tester |
| CN105067465B (en) * | 2015-08-04 | 2018-01-19 | 中国矿业大学 | A kind of double acting platform parallel connected bionic hip joint tester and its test method |
| CN105276354B (en) * | 2015-10-19 | 2017-06-13 | 中国矿业大学 | A kind of hip joint tester self-lubricating structure and its method of work |
| CN108593475B (en) * | 2018-06-04 | 2020-11-03 | 辽宁工程技术大学 | Erosion and abrasion experiment table for meniscus of artificial knee joint |
| CN109323946A (en) * | 2018-09-07 | 2019-02-12 | 南昌大学 | A kind of artificial knee joint friction wear testing machine |
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| US6865954B2 (en) * | 2003-03-10 | 2005-03-15 | Spinecore, Inc. | Joint simulator testing machine |
| CN1677081A (en) * | 2005-03-25 | 2005-10-05 | 湖北工业大学 | Artificial joint simple simulated wear test method and its test machine |
| CN101451933A (en) * | 2008-12-18 | 2009-06-10 | 北京林业大学 | Six-dimension loading material mechanical test machine |
| CN201837569U (en) * | 2010-09-27 | 2011-05-18 | 中国矿业大学 | Multi-shaft artificial joint testing machine |
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|---|---|---|---|---|
| JP4393723B2 (en) * | 2001-03-26 | 2010-01-06 | 西島メディカル株式会社 | Artificial joint friction and wear tester |
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2010
- 2010-09-27 CN CN2010105018342A patent/CN101984338B/en not_active Expired - Fee Related
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| US6865954B2 (en) * | 2003-03-10 | 2005-03-15 | Spinecore, Inc. | Joint simulator testing machine |
| CN1677081A (en) * | 2005-03-25 | 2005-10-05 | 湖北工业大学 | Artificial joint simple simulated wear test method and its test machine |
| CN101451933A (en) * | 2008-12-18 | 2009-06-10 | 北京林业大学 | Six-dimension loading material mechanical test machine |
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Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105092238A (en) * | 2015-09-25 | 2015-11-25 | 中国矿业大学 | Multiple-movable-platform parallel-connected hip joint testing machine with wire rope flexible cable transmission |
| CN105092238B (en) * | 2015-09-25 | 2017-06-09 | 中国矿业大学 | A kind of many moving platforms parallel connection hip joint tester of steel wire rope flexible cable transmission |
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| CN101984338A (en) | 2011-03-09 |
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