CN101975707B - Hip joint testing machine based on steel rope drive - Google Patents
Hip joint testing machine based on steel rope drive Download PDFInfo
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- CN101975707B CN101975707B CN2010105018427A CN201010501842A CN101975707B CN 101975707 B CN101975707 B CN 101975707B CN 2010105018427 A CN2010105018427 A CN 2010105018427A CN 201010501842 A CN201010501842 A CN 201010501842A CN 101975707 B CN101975707 B CN 101975707B
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Abstract
The invention relates to a hip joint testing machine based on steel rope drive, which integrates machine, electricity and liquid technologies into a whole, is suitable for accurately and reliably testing the biotribology characteristic parameters of joint prosthesis materials and provides guiding test data for medical clinical application. The hip joint testing machine mainly comprises a support part, a mechanical drive part, a hydraulic loading system and a temperature control part, wherein the mechanical drive part comprises a telescopic and stretching spring, a cam, a fixed pulley and a steel rope, wherein the steel rope is connected with a moving platform, a joint ball head and a spherical base of a thrust bearing are connected with and fixed to the moving platform, and the steel rope drives the moving platform and the joint ball head to complete crossed multidirectional compound sliding and rotary motion under the combined action of the cam; the hydraulic loading system is guided by a loading oil cylinder fixed on a top plate to drive a acetabulum to apply loads to the joint ball head; and the top plate of the hip joint testing machine is provided with a temperature controller. The invention has the advantages of simple structure and low cost, is convenient to operate and can simulate the actual motion conditions of the hip joints of human bodies.
Description
Technical field
The present invention relates to a kind of joint prosthesis testing machine; Especially a kind ofly the actual motion operating mode of human hip can be in testing laboratory's environment, correctly simulated, and the joint prosthesis testing machine based on the wire rope transmission of the bio-tribology characterisitic parameter of artificial joint material can be tested reliably.
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.The joint prosthesis testing machine carries out friction-wear test to artificial joint material; Friction and wear behavior through the analysis of experimental data artificial joint material; This is for the service property (quality) that improves joint prosthesis, prolongs its clinical life-span and alleviates the patient suffering and have important practical significance.
The hip joint 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).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.The balance staff type HUT-BRM hip-joint simulator testing machine of technology university, Helsinki development, because the restriction of condition, the deviser has omitted the motion on xsect.The first generation simulation tester for artificial hip joint that China Mining University tribology and Research on Automobile's Reliability Engineering design and make also belongs to balance staff type testing machine by structure and motion principle.Pin dish-type friction wear testing machine is a joint prosthesis tribology conventional test equipment; 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; Usually adopt three kinds of ways of contact, but the mode of motion difference of the way of contact of this type testing machine 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 MK system of Britain Leeds university and Durham university has made fountain type artificial hip joint simulated experiment machine, has omitted the swing on the coronal-plane in the design equally.
Summary of the invention
The objective of the invention is to overcome the weak point in the prior art; A kind of compact conformation, stable performance, the cheap hip joint testing machine based on the wire rope transmission that can realize the multidirectional compound motion of cross-like are provided, and this testing machine belongs to fountain type joint prosthesis simulated experiment machine on principle.
For realizing above-mentioned purpose; Hip joint testing machine based on the wire rope transmission of the present invention; Comprise by top board, base plate and be connected the framework that the pillar between top, the base plate constitutes, be provided with bracing frame in the framework, being provided with up and down in the bracing frame, two ends are not fixed on the transmission shaft on bracing frame and the base plate; Be provided with down cam, turbine worm, cam, overhead cam on the transmission shaft successively; The two ends of transmission shaft are provided with the bearing seat that is separately fixed on base plate and the bracing frame, and the top of bracing frame is provided with the cambered surface bearing seat, and the cambered surface bearing seat is provided with the sphere pedestal that matches with its cambered surface; The sphere pedestal is provided with the solution basin; Be provided with the joint ball head shoot seat that is inlaid in the sphere pedestal in the solution basin, the solution basin is provided with the moving platform that fixes with its basin edge, and the edge of moving platform is provided with the rope traction device that is connected with the upper, middle and lower cam respectively; Top board is provided with the hydraulic cylinder that links to each other with hydraulic system, and the piston rod of hydraulic cylinder passes top board, which is provided with guide runner and is buckled in the fossa glenoid on the bulb of joint, is provided with the pillar pressure transducer between guide runner and the fossa glenoid; Be provided with spring assembly between top board and the moving platform; Top board is provided with the temperature controller of temperature in the control solution basin; Base plate is provided with the bulb ejector pin that withstands on the rotation axis.
Described cambered surface bearing seat is by the cover for seat that has Baltimore groove, constitute with the thrust bearing seat ring of the Baltimore groove transition fit of cover for seat; Described silk rope draw-gear comprises that the steel-wire fastener, the level that are fixed on the moving platform bottom are located at the inboard cam pin of bracing frame; The cam pin is provided with compression spring; Be connected with wire rope between the afterbody of cam pin and the steel-wire fastener, the outside of bracing frame is provided with the wire rope fixed pulley; Described spring assembly comprises the spring base that is fixed on the moving platform, is located at the spring on the spring base, and spring top is provided with the spring guide that is fixed on the top board bottom, and the spring top is provided with the trimming bolt that is fixed on the top board; Described moving platform is the equilateral triangle plank frame; Described solution basin is the staircase structure of bottom sealing.
Beneficial effect: the suffered load of hip joint when the present invention utilizes hydraulic system that anthropomorphic dummy's walking is provided; Utilize traditional mechanical parts such as cam, fixed pulley, spring and wire rope to substitute the electronic cylinder of expensive import; 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 bulb, and only needing to change different ball cups can be connected with testing machine.The sphere pedestal of thrust bearing is concentric with the joint bulb, can make the joint bulb in doing the process of compound motion, and the load on its non-perpendicular direction is zero.Under the off working state, can come moving platform is carried out leveling through regulating trimming bolt and steel-wire fastener; Utilize the outline track of cam to come anthropomorphic dummy's curve movement, in the time must increasing the pivot angle of moving platform, need only increase the eccentric throw of cam, simulate the joint motions under the different working conditions like need, the cam that need only change different outlines gets final product; 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 ℃.Utilize traditional mechanical parts such as cam, fixed pulley, spring and wire rope to substitute the electronic cylinder of expensive import, can effectively reduce experimentation cost and maintenance cost, increase the applicability of testing machine.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a moving platform structure schematic top plan view of the present invention.
Among the figure: 1-cam pin, cam under the 2-, 3-bearing seat, 4-bulb ejector pin, 5-turbine worm, 6-base plate, 7-pillar; The 8-stepper motor, 9-cam, 10-compression spring, 11-fixed pulley, 12-overhead cam, 13-bearing collar, 14-cover for seat; 15-thrust bearing seat ring, 16-wire rope, 17-screw, 18-steel-wire fastener, 19-moving platform, 20-bolt, 21-holding screw; The 22-top board, 23, the 24-bolt, 25-straight pin, 26-hydraulic cylinder, 27-orienting sleeve, 28-guider screw; The 29-trimming bolt, 30-orienting lug, 31-temperature controller, 32-spring guide, 33-extension spring, 34-pillar pressure transducer; The 35-holding screw, 36-spring base, 37-fixation with steel wire axle, 38-fossa glenoid, 39-solution basin, 40-joint bulb; 41-joint ball head shoot seat, 42-holding screw, 43-sphere pedestal, 44-clamp nut, 45-bracing frame, 46-transmission shaft.
Embodiment
Below in conjunction with the embodiment in the accompanying drawing the present invention is done further description:
Shown in Figure 1; Based on the hip joint testing machine of wire rope transmission mainly by framework, be located at the moving platform 19 in the framework; The transmission shaft 46 of moving platform 19 belows, cam, turbine worm gear train, bracing frame 45, solution basin 39, ball cup 41; The pillar pressure transducer 34 of moving platform 19 tops, orienting lug 30, hydraulic cylinder 26, spring assembly constitute, and framework is made up of top board 22, base plate 6 and the pillar 7 that is connected between top, the base plate.The turbine worm gear train mainly is made up of stepper motor 8, the turbine worm 5 that links to each other with stepper motor 8.Bracing frame 45 is fixed on the base plate 6 of framework; Be provided with vertical drive shaft 46 in the bracing frame 45; The upper/lower terminal of transmission shaft 46 is fixed on bracing frame 45 and the base plate 6 through bearing seat 3 respectively, is provided with down cam 2, turbine worm 5, cam 9, overhead cam 12 on the transmission shaft 46 successively; The upper end of the lower end of following cam 2 and overhead cam 12 is respectively equipped with back-up ring, and the turbine lower end of turbine worm gear train and the upper end of cam 9 are respectively equipped with clamp nut 44; The top of bracing frame 45 is provided with the cambered surface bearing seat, and the cambered surface bearing seat is by the cover for seat that has Baltimore groove 14, constitute with the thrust bearing seat ring 15 of the Baltimore groove transition fit of cover for seat 14.Cambered surface bearing seat 15 is provided with the sphere pedestal 43 that matches with its cambered surface; Sphere pedestal 43 is provided with solution basin 39; Solution basin 39 is the staircase structure of bottom sealing, and the joint balls head shoot seat 41 that is inlaid in the sphere pedestal 43 is housed in the solution basin 39, and the holding screw 42 that joint ball head shoot seat 41 is fixing is housed; Joint ball head shoot seat 41 is fixed together through screw and sphere pedestal 43; On the joint ball head shoot seat 41 joint bulb 40 is set, solution basin 39 is provided with the moving platform 19 that fixes with its end face, and moving platform 19 is the equilateral triangle plank frame.Three corner edge of moving platform 19 are provided with the rope traction device that is connected with upper, middle and lower cam 12,9,2 respectively; Three drift angles of moving platform 19 have T type groove; Fixation with steel wire axle 37 is fixed in the T type groove, can realize the fast quick-detach of wire rope 16.And the connecting hole of three extension springs 33 is evenly arranged on moving platform 19.Silk rope draw-gear comprises that the steel-wire fastener 18, the level that are fixed on moving platform 19 bottoms are located at the cam pin 1 of bracing frame 45 inboards; Cam pin 1 is provided with compression spring 10; Be connected with wire rope 16 between the afterbody of cam pin 1 and the steel-wire fastener 18, the outside of bracing frame 45 is provided with wire rope fixed pulley 11.Top board 22 is provided with the hydraulic cylinder 26 that links to each other with hydraulic system; The piston rod of hydraulic cylinder 26 passes top board 22; Which is provided with guide runner 30 and be buckled in the fossa glenoid 38 on the joint bulb 40; Being provided with model between guide runner 30 and the fossa glenoid 38 is the pillar pressure transducer 34 of MCL-Z5, and the two ends of pillar pressure transducer 34 fix through holding screw 35 and fossa glenoid 38 and orienting lug 30 respectively, and orienting lug 30 is provided with orienting sleeve 27 with hydraulic cylinder 26 outsides; Orienting sleeve 27 is provided with guider screw 28, has gathering sill on guide runner 30 outer walls; Hydraulic cylinder 26 is fixed on the top board 22 through bolt 27; The external part of hydraulic cylinder 26 and orienting lug 30 are to be threaded; Holding screw 21 plays the anti-rotation effect; Orienting sleeve 27 is fixed on the top board 22 through shoulder hole and straight pin 25, and guider screw 28 is fixed on the sidewall of orienting sleeve 27, and the guide groove on orienting lug 30 sidewalls is accomplished the guide function of hydraulic cylinder 26 external parts.Be provided with spring assembly between top board 22 and the moving platform 19; Spring assembly comprises the spring base 36 that is fixed on the moving platform 19, is located at the extension spring 33 on the spring base 36; Extension spring 33 tops are provided with the spring guide 32 that is fixed on the top board bottom, and extension spring 33 tops are provided with the trimming bolt 29 that is fixed on the top board, and extension spring 33 lower ends are fixed on the moving platform 19 through spring pedestal 36; The upper end withstands on the trimming bolt 29 through spring guide 32; Trimming bolt 29 can be finely tuned extension spring 33 through clamp nut and spring washer to be threaded on the top board 25, and then realizes the leveling of moving platform 19.Wire rope 16 is connected with cam pin 1 through fixed pulley 11 and compression spring 10, and stepper motor 8 drives the upper, middle and lower cam through the turbine and worm gear train and rotates with particular trajectory.Top board 22 is provided with the temperature controller 31 of temperature in the control solution basin 39; Base plate 6 is provided with the bulb ejector pin 4 that withstands on the rotation axis 46.One end of wire rope 16 links to each other with moving platform 19 with wire rope stationary shaft 36 through steel-wire fastener 18; Steel-wire fastener 18 can be regulated wire rope 16; Wire rope stationary shaft 37 can make wire rope 16 accomplish dismounting rapidly; The other end of wire rope 19 is fixed on the cam pin 1 through fixed pulley 11, and cam pin 1 is close on the cam through compression spring 10, and the rotation of cam just can drive wire rope 16 and pump.Under the acting in conjunction of three wire rope, just can realize the multidirectional compound motion of cross-like of moving platform 19.Bearing fixing is passed through in bearing seat 3 in the two ends of transmission shaft 46; Bearing seat 3 is separately fixed on bracing frame 46 lower surfaces and the base plate 6, and three cams and turbine are fixed on the transmission shaft 46 with flat key, bearing collar 13, clamp nut 44 and shaft shoulder end face respectively, and worm screw links to each other with stepper motor 8 through shaft coupling; Stepper motor 8 can drive three cams in upper, middle and lower and rotate with identical speed; The outline of cam can be processed according to the movement locus that reality requires, and in the time must increasing the pivot angle of moving platform 19, need only increase the eccentric throw of cam; When the joint motions of simulation under the different working conditions, need only change the cam of different outlines.Joint bulb 40 is to be threaded on the joint ball headstock 41, and holding screw 42 plays the anti-rotation effect, joint ball headstock 41 and solution basin 39 transition fit; Sphere pedestal 43 transition fit of solution basin 39 and thrust bearing are fixed the three with screw again, and solution basin 39 is the bottom surface enclosed construction; Can effectively prevent the leakage of lubricating fluid, sphere pedestal 43 is slidingly matched with thrust bearing seat ring 15, simultaneously; The spherical outside surface centre of sphere of the centre of sphere of joint bulb 40 and sphere pedestal 43 is at same position; With assurance in the course of the work, the load that hydraulic cylinder 26 applies is just in time passed through the centre of sphere of joint bulb 40, and load is zero on non-vertical direction.
Claims (6)
1. hip joint testing machine based on the wire rope transmission; It is characterized in that: it comprises by top board (22), base plate (6) and is connected the framework that the pillar (7) between top, the base plate constitutes; Be provided with bracing frame (45) in the framework; Being provided with up and down in the bracing frame (45), two ends are separately fixed at the transmission shaft (46) on bracing frame (45) and the base plate (6); Be provided with down cam (2), turbine worm (5), cam (9), overhead cam (12) on the transmission shaft (46) successively, the two ends up and down of transmission shaft (46) are respectively equipped with bearing seat (3), up and down two bearing seats (3) be separately fixed at that base plate (6) is gone up and bracing frame (45) below; The top of bracing frame (45) is provided with the cambered surface bearing seat; The cambered surface bearing seat is provided with the sphere pedestal (43) that matches with its cambered surface, and sphere pedestal (43) is provided with solution basin (39), is provided with the joint ball head shoot seat (41) that is inlaid in the sphere pedestal (43) in the solution basin (39); Solution basin (39) is provided with the moving platform (19) that fixes with its basin edge, and the edge of moving platform (19) is provided with the rope traction device that is connected with upper, middle and lower cam (12,9,2) respectively; Top board (22) is provided with the hydraulic cylinder (26) that links to each other with hydraulic system; The piston rod of hydraulic cylinder (26) passes top board (22); Which is provided with guide runner (30) and be buckled in the fossa glenoid (38) on the joint bulb (40), be provided with pillar pressure transducer (34) between guide runner (30) and the fossa glenoid (38); Be provided with spring assembly between top board (22) and the moving platform (19); Top board (22) is provided with the temperature controller (31) of the interior temperature of control solution basin (39); Base plate is provided with the bulb ejector pin (4) that withstands on the rotation axis (46).
2. the hip joint testing machine based on the wire rope transmission according to claim 1 is characterized in that: described cambered surface bearing seat is by the cover for seat that has Baltimore groove (14), constitute with the thrust bearing seat ring (15) of the Baltimore groove transition fit of cover for seat (14).
3. the hip joint testing machine based on the wire rope transmission according to claim 1; It is characterized in that: described rope traction device comprises that the steel-wire fastener (18), the level that are fixed on moving platform (19) bottom are located at the inboard cam pin (1) of bracing frame (45); Cam pin (1) is provided with compression spring (10); Be connected with wire rope (16) between the afterbody of cam pin (1) and the steel-wire fastener (18), the outside of bracing frame (45) is provided with wire rope fixed pulley (11).
4. the hip joint testing machine based on the wire rope transmission according to claim 1; It is characterized in that: described spring assembly comprises the spring base (36) that is fixed on the moving platform (19), is located at the extension spring (33) on the spring base (36); Extension spring (33) top is provided with the spring guide (32) that is fixed on the top board bottom, and extension spring (33) top is provided with the trimming bolt (29) that is fixed on the top board.
5. the hip joint testing machine based on the wire rope transmission according to claim 1 is characterized in that: described moving platform (22) is the equilateral triangle plank frame.
6. the hip joint testing machine based on the wire rope transmission according to claim 1 is characterized in that: described solution basin (39) is the staircase structure of bottom sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105018427A CN101975707B (en) | 2010-09-27 | 2010-09-27 | Hip joint testing machine based on steel rope drive |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105018427A CN101975707B (en) | 2010-09-27 | 2010-09-27 | Hip joint testing machine based on steel rope drive |
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| Publication Number | Publication Date |
|---|---|
| CN101975707A CN101975707A (en) | 2011-02-16 |
| CN101975707B true CN101975707B (en) | 2012-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105018427A Expired - Fee Related CN101975707B (en) | 2010-09-27 | 2010-09-27 | Hip joint testing machine based on steel rope drive |
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Families Citing this family (16)
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| CN102525691B (en) * | 2012-02-01 | 2014-08-20 | 中国矿业大学 | Air cylinder self-resetting type hip joint test machine |
| CN104128930A (en) * | 2014-07-29 | 2014-11-05 | 杭州沪清科技有限公司 | Anthropomorphic hip structure capable of freely moving in all directions |
| 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 |
| 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 |
| 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 |
| 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 |
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| CN106053045B (en) * | 2016-07-08 | 2019-12-06 | 上海大学 | Hip joint angle measuring device |
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| CN106644691A (en) * | 2016-12-09 | 2017-05-10 | 安徽省建筑工程质量监督检测站 | Support leveling device for testing of splitting tensile strength and clamp thereof |
| CN106913400B (en) * | 2017-03-24 | 2019-01-11 | 清华大学 | Fluid pressure type Three Degree Of Freedom artificial hip joint testing machine |
| CN109919943B (en) * | 2019-04-16 | 2020-11-10 | 广东省妇幼保健院 | Automatic detection method and system for hip joint angle of infant and computing equipment |
| CN112326487A (en) * | 2020-10-29 | 2021-02-05 | 河南科技大学 | Current-carrying friction test device and method for conductive brush wire |
| CN112595604B (en) * | 2020-11-25 | 2022-04-29 | 山东大学 | Table type material mechanics testing machine |
| CN113084863A (en) * | 2021-03-19 | 2021-07-09 | 杭州国辰机器人科技有限公司 | Composite joint simulating freedom degree of human wrist and motion method |
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| CN87103964A (en) * | 1987-05-30 | 1988-02-10 | 浙江大学 | Diagonal angle ball-articulation spatial seven-link assembly simulation tester for artificial hip joint |
| CN200963136Y (en) * | 2006-08-22 | 2007-10-24 | 中国人民解放军第三军医大学第一附属医院 | General biological joint six free degree dynamic stress loading system |
| CN201831982U (en) * | 2010-09-27 | 2011-05-18 | 中国矿业大学 | Hip joint tester based on wire rope transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080161731A1 (en) * | 2006-12-27 | 2008-07-03 | Woods Sherrod A | Apparatus, system, and method for monitoring the range of motion of a patient's joint |
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|---|---|---|---|---|
| CN87103964A (en) * | 1987-05-30 | 1988-02-10 | 浙江大学 | Diagonal angle ball-articulation spatial seven-link assembly simulation tester for artificial hip joint |
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| CN201831982U (en) * | 2010-09-27 | 2011-05-18 | 中国矿业大学 | Hip joint tester based on wire rope transmission |
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