CN103257076A - Artificial hip joint dynamic fatigue wear sample clamp and tester - Google Patents
Artificial hip joint dynamic fatigue wear sample clamp and tester Download PDFInfo
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- CN103257076A CN103257076A CN2013102022570A CN201310202257A CN103257076A CN 103257076 A CN103257076 A CN 103257076A CN 2013102022570 A CN2013102022570 A CN 2013102022570A CN 201310202257 A CN201310202257 A CN 201310202257A CN 103257076 A CN103257076 A CN 103257076A
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Abstract
The invention relates to an artificial hip joint dynamic fatigue wear sample clamp and a tester. The clamp comprises a femoral head sample fixing part for driving femoral head samples to rotate and an acetabulum sample fixing part, wherein the acetabulum sample fixing part comprises a base and an inclined tray; and acetabulum samples are mounted on the base which is arranged in the inclined tray. The tester comprises a femoral head sample rotating part, a sample clamp and a sample loading part, which are positioned at the upper part of the tester, wherein the femoral head sample rotating part comprises a rotating motor and an upper spindle rotating under the driving of the motor; tail conical holes for mounting the femoral head samples are formed in the lower end part of the upper spindle; and the sample loading part comprises a loading motor, a speed reducer and a loading drive part for applying load to the acetabulum samples. The test clamp is simple in structure and convenient to install. The tester has the advantages that the structure is advanced, the control is accurate and the test data reliability is high.
Description
Technical field
The present invention relates to technical field of medical instruments, specifically relate to a kind of artificial hip joint dynamic fatigue wear test anchor clamps and testing machine.
Background technology
Along with the continuous quickening of rhythm of life, in the face of the life stress that increases day by day, suffer from orthopaedic disease class number and be the trend that rises year by year.In numerous bone class diseases, hip joint disease is expansion trend and is subjected to extensive concern to relate to personnel's the range of age.Such disease treatment approach the most effectively is to carry out the artificial hip joint transfer operation at present.The artificial hip joint of implant into body plays the effect in former joint at inside of human body sufferer place, but the physiological environment complexity because of inside of human body, the artificial hip joint selection has nothing in common with each other to high-molecular polythene etc. from metal, pottery in addition, along with the continuous growth of transplant time, artificial hip joint begins to occur the fatigue failure phenomenon.Present researching and analysing with clinical practice proves, the ball and socket joint of artificial hip joint (being commonly called as artificial thigh bone) and manual acetabulum are under the effect of the frequent load that changes, and the rubbing wear that being accompanied by slides produces is the main cause that causes artificial hip joint to lose efficacy after transplanting.For this reason, the period that losing efficacy appears after transplanting in the prediction artificial hip joint, the principal element of the wear out failure that clearly produces and the mechanism of effect have been equipped with the design that further improves artificial hip joint, become one of target of prolongation hip joint transfer operation effect.At present, the means of fatigue, friction and wear that are used for the artificial hip joint of research concentrate on and adopt artificial hip joint friction wear testing machine and the case in clinical transplantation later stage investigation dual mode.The artificial hip joint friction wear testing machine is the ideal means that adopt in the research at present, and motion and the stressing conditions of simulation artificial hip joint that can be comparatively desirable after implantation satisfied real demand to a certain extent; The case investigation in clinical transplantation later stage only is applicable to final result's contrast and improvement in performance reference because of its sampling inconvenience and cost height.The testing machine that present stage is domestic to be applied to simulate the artificial hip joint fatigue wear is confined to imitated more or improves external original product, and quantity is few, and technology is not mature enough.
Application number is 200520078197.7, the application title is to disclose a kind of testing machine in the utility model patent of " reciprocating type femur friction wear testing machine ", this machine is by worktable, be located at the following specimen holder dolly on the worktable, ride over down the last specimen holder of specimen holder dolly top, V-type rail and variable-frequence governor and data acquisition system (DAS) constitute, last specimen holder is located in the V-type rail that is fixed in the base both sides, also be provided with actuating unit on the worktable, its below is provided with the to-and-fro movement reversing arrangement of control desk, and following specimen holder dolly is rigidly connected with the sensor that is fixed on the worktable.During test, the femur sample is installed in the upper and lower anchor clamps, the deadweight by counterweight and slide block and anchor clamps loads friction pair, and under stress state, the vertical contact of upper and lower sample is intersected.After opening motor, motor move through electrical machine belt pulley, driving-belt, leading screw belt wheel turn-screw, about under the control of two travel switches, make worktable produce to-and-fro movement on the horizontal direction, realize the wearing and tearing of sample reciprocating friction.Advantage of the present utility model has been to use the last specimen holder that can fluctuate along V-way with simulation femur actual working state, friction force when measuring motion with tension-compression sensor, thereby improved test accuracy, have bigger environmental difference but be placed between femur in this specimen holder and the femur in the human body, it is a kind of stressed continuously dynamically that the combination of counterweight and tension-compression sensor can't provide.
Summary of the invention
The object of the present invention is to provide a kind of motion, the stressed and lubricating status that can realize simulating behind the artificial hip joint implant into body, the testing machine of test different materials hip prosthesis dynamic fatigue wear condition under certain condition, for clinical practice provides experimental data comparatively accurately and reliably, and remedy domestic deficiency aspect artificial hip joint dynamic fatigue wearing and tearing simulation test machine.The technical scheme that adopts is: a kind of artificial hip joint dynamic fatigue wearing and tearing specimen holder, comprise and drive femoral head sample fixed part and the acetabular bone sample fixed part that the femoral head sample rotates, it is characterized in that: described acetabular bone sample fixed part comprises base and oblique pallet, and the acetabular bone sample is installed on the described base; Described base places oblique pallet.
Technical characterictic of the present invention also has: described specimen holder also comprises a set of cups that holds lubricating fluid, and described a set of cups is provided with the lubricating fluid escape hole.
Technical scheme of the present invention also has: a kind of artificial hip joint fatigue wear testing machine, this machine comprises femoral head sample rotating part, the described specimen holder of claim 1 and the sample loading section that is positioned at testing machine top, it is characterized in that: described femoral head sample rotating part comprises that rotary electric machine reaches main shaft on rotating under this driven by motor, and described bottom of going up main shaft has for the afterbody taper hole that the femoral head sample is installed; Described sample loading section comprises loading motor, reduction gear and to the loading drive disk assembly of acetabular bone sample imposed load.
Technical characterictic of the present invention also has: described loading drive disk assembly is included in described loading motor and drives turn-screw, the transmission nut that cooperates with turn-screw, flexible afterburning parts and the sensing element that rotates down.
Technical characterictic of the present invention also has: the afterburning parts of described flexibility comprise the energizing spring that is sleeved on the described transmission nut, the other end of described energizing spring is contained in the groove of power transmission nut, drive screw and this drive screw are housed in the endoporus of power transmission nut to be contained in the hole of combined support frame, the guiding lower main axis also is equipped with on the top of described combined support frame, has the groove that cooperates with described guiding lower main axis on the lower surface of described oblique pallet.
Technical characterictic of the present invention also has: described sensing element comprises axial force transducer, and described axial force transducer is contained in the upper end of described drive screw.
Technical characterictic of the present invention also has: described sensing element also comprises pull pressure sensor, on the sidewall that is installed in described combined support frame of described pull pressure sensor.
Technical characterictic of the present invention also has: on described main shaft afterbody taper hole above also have one perpendicular to the cross through hole of afterbody taper hole.
Beneficial effect of the present invention is: 1) this specimen holder is simple in structure, installation is convenient, and the femoral head sample directly snaps fits into the position by taper hole, has 23 angles between femoral head and the hip joint sample; Simultaneously can dielectric testing and dry wear test be arranged respectively according to testing requirements, thereby imitate the practical structures of human body fully, for accurate providing of test figure lays the foundation;
2) this testing machine is vertical structure, and specimen holder and the sample that is contained in these anchor clamps are positioned at this machine centre position, and sample is subjected to force direction consistent with organization of human body; Under computer program control, flexible afterburning parts and sensing element are used has realized accurately applying of load, for test provides accurate data;
3) this testing machine has the structure advanced person, controls the advantage accurate, that the test figure reliability is high.
Description of drawings
Accompanying drawing 1 is femoral head sample structure synoptic diagram, and accompanying drawing 2 is acetabular bone sample structure synoptic diagram, and accompanying drawing 3 is clamp structure principle schematic, accompanying drawing 4 is this testing machine front views, and accompanying drawing 5 is left views of accompanying drawing 4, and wherein 1 is rotary electric machine, the 2nd, synchronous pulley, the 3rd, synchronous band, the 4th, last main shaft, the 5th, femoral head sample, the 6th, acetabular bone sample, the 7th, base, the 8th, a set of cups, the 9th, oblique pallet, the 10th, guiding lower main axis, the 11st, axial force transducer, the 12nd, pull pressure sensor, the 13rd, drive screw, the 14th, the power transmission nut, the 15th, energizing spring, the 16th, transmission nut, the 17th, turn-screw, the 18th, following suspension rod, the 19th, turbine and worm, the 20th, loading motor, the 21st, pedestal, the 22nd, support bar, the 23rd, top plate, the 24th, lower plywood, the 25th, combined support frame.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described.A kind of artificial hip joint dynamic fatigue wearing and tearing specimen holder, comprise and drive femoral head sample fixed part and the acetabular bone sample fixed part that femoral head rotates, wherein acetabular bone sample fixed part comprises base 7 and oblique pallet 9, acetabular bone sample 6 directly is placed in the base 7, base 7 places oblique pallet 9, and tiltedly have an angle between pallet 9 and the horizontal direction, this angle is formulated according to the human body practical structures, generally is 23.During use, femoral head sample 5 is contained in the femoral head sample fixed part fast, the circular groove of acetabular bone sample 6 by acetabular bone sample 6 bottoms placed base 7, again base 7 is placed oblique pallet 9.If need there be lubricant medium to participate in test, then install a set of cups 8 additional, and in a set of cups 8, add lubricating fluid, it is suitable that the addition of lubricating fluid has liquid to exist for the joint prosthesis contact position.Be provided with the lubricating fluid escape hole in the bottom of a set of cups 8, so that the lubricating fluid after using is discharged smoothly.
The invention also discloses a kind of artificial hip joint fatigue wear testing machine, this machine comprises the femoral head sample rotating part that is positioned at testing machine top, specimen holder and the sample loading section of clamping sample to be tested.Femoral head sample rotating part comprises rotary electric machine 1 and main shaft 4 on rotating under this driven by motor, the bottom of last main shaft 4 has for the afterbody taper hole that femoral head sample 5 is installed, and also has one perpendicular to the cross through hole of afterbody taper hole above the afterbody taper hole of last main shaft 4.Femoral head sample 5 is installed in the afterbody taper hole of main shaft 4, and checks that the back guarantees not have unusual fluctuation to produce and gets final product, cross through hole is used for the dismounting of femoral head sample 5.Rotary electric machine 1 drives upward main shaft 4 rotations after passing through to be with synchronously transmission, and then drives 5 rotations of femoral head sample.
The sample loading section comprises loading motor 20, the turbine and worm speed reduction unit 19 that is connected with loading motor 20 and to the loading drive disk assembly of acetabular bone sample 6 imposed loads.Load drive disk assembly and be included in loading motor 20,19 drives of the turbine and worm speed reduction unit sensing element of turn-screw 17, the transmission nut 16 that cooperates with turn-screw 17, the flexible afterburning parts of giving the 6 flexible reinforcings of acetabular bone sample and the feedback reinforcing size of rotation down.Wherein flexible afterburning parts comprise the energizing spring 15 that is sleeved on the transmission nut 16, the other end of this energizing spring 15 is contained in the groove of power transmission nut 14, by screw thread drive screw 13 and this drive screw 13 being housed in the endoporus of power transmission nut 14 is contained in the hole on the combined support frame 25, guiding lower main axis 10 also is equipped with on the top of combined support frame 25, tiltedly has the groove that cooperates with the lower main axis 10 that leads on the lower surface of pallet 9.When loading motor 20 rotates, slow down through turbine and worm speed reduction unit 19, turn-screw 17 rotates, under turn-screw 17 drives, transmission nut 16 can on move, thereby compression energizing spring 15, behind energizing spring 15 pressurizeds, stretching upwards the drive screw 13 that promotes power transmission nut 14 and be assembled together with it moves upward, drive is installed in the axial force transducer 11 and its movement therewith of drive screw 13 upper ends, when axial force transducer 11 upper ends after lower main axis 10 contact with guiding, thereby apply acting force for oblique pallet 9 by guiding lower main axis 10, reach the purpose of reinforcing.Reseting procedure is no longer narrated at this.
Sensing element comprises axial force transducer 11 and pull pressure sensor 12, and axial force transducer 11 is contained in the upper end of drive screw 13, and after moving on the drive screw 13, axial force transducer 11 is measured axial force size and by the computer-controlled program control of being correlated with.Pull pressure sensor 12 is installed on combined support frame 25 inwalls of axial force transducer 11, when axial force transducer 11 moves to when contacting with the lower main axis 10 that leads, the part setting in motion that pull pressure sensor 12 connects with guiding lower main axis 10, pull pressure sensor 12 is measured pulling force or the pressure moment of this moment, be input to computing machine, carry out the acquisition process of data.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention also is not limited only to above-mentioned giving an example, and the variation that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement also belong to protection scope of the present invention.
Claims (8)
1. artificial hip joint dynamic fatigue wearing and tearing specimen holder, comprise and drive femoral head sample fixed part and the acetabular bone sample fixed part that the femoral head sample rotates, it is characterized in that: described acetabular bone sample fixed part comprises base and oblique pallet, and the acetabular bone sample is installed on the described base; Described base places oblique pallet.
2. according to the described artificial hip joint dynamic fatigue wearing and tearing of claim 1 specimen holder, it is characterized in that: described specimen holder also comprises a set of cups that holds lubricating fluid, and described a set of cups is provided with the lubricating fluid escape hole.
3. artificial hip joint fatigue wear testing machine, this testing machine comprises femoral head sample rotating part, the described specimen holder of claim 1 and the sample loading section that is positioned at testing machine top, it is characterized in that: described femoral head sample rotating part comprises that rotary electric machine reaches main shaft on rotating under this driven by motor, and described bottom of going up main shaft has for the afterbody taper hole that the femoral head sample is installed; Described sample loading section comprises loading motor, reduction gear and to the loading drive disk assembly of acetabular bone sample imposed load.
4. according to the described artificial hip joint fatigue wear testing machine of claim 3, it is characterized in that: described loading drive disk assembly is included in described loading motor and drives turn-screw, the transmission nut that cooperates with turn-screw, flexible afterburning parts and the sensing element that rotates down.
5. according to the described artificial hip joint fatigue wear testing machine of claim 4, it is characterized in that: the afterburning parts of described flexibility comprise the energizing spring that is sleeved on the described transmission nut, the other end of described energizing spring is contained in the groove of power transmission nut, drive screw and this drive screw are housed in the endoporus of power transmission nut to be contained in the hole of combined support frame, the guiding lower main axis also is equipped with on the top of described combined support frame, has the groove that cooperates with described guiding lower main axis on the lower surface of described oblique pallet.
6. according to the described artificial hip joint fatigue wear testing machine of claim 5, it is characterized in that: described sensing element comprises axial force transducer, and described axial force transducer is contained in the upper end of described drive screw.
7. according to the described artificial hip joint fatigue wear testing machine of claim 6, it is characterized in that: described sensing element also comprises pull pressure sensor, and described pull pressure sensor is installed on the sidewall of described combined support frame.
8. according to the described artificial hip joint fatigue wear testing machine of claim 3, it is characterized in that: on described main shaft afterbody taper hole above also have one perpendicular to the cross through hole of afterbody taper hole.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297091A (en) * | 2014-10-23 | 2015-01-21 | 桂林电子科技大学 | Novel artificial hip joint friction testing machine |
| CN104359780A (en) * | 2014-11-28 | 2015-02-18 | 济南大学 | Femoral head handle bulb frictional wear testing device |
| CN104990790A (en) * | 2015-07-07 | 2015-10-21 | 苏州热工研究院有限公司 | Clamp for sliding abrasion test |
| CN105223010A (en) * | 2015-10-12 | 2016-01-06 | 中国矿业大学 | A kind of parallel bionical knee-hip joint tester |
| CN105276354A (en) * | 2015-10-19 | 2016-01-27 | 中国矿业大学 | Self-lubricating structure of hip joint testing machine and working method of self-lubricating structure |
| CN105891036A (en) * | 2016-05-23 | 2016-08-24 | 西南交通大学 | Impacting-sliding composite frictional wear testing device and method thereof |
| CN107505192A (en) * | 2017-06-23 | 2017-12-22 | 天津市天津医院 | Acetabular bone simulation fixture and preparation method thereof |
| CN107727523A (en) * | 2017-10-18 | 2018-02-23 | 浙江工业大学 | A kind of multifunction manual hip joint abrasion tester |
| CN108007684A (en) * | 2017-12-28 | 2018-05-08 | 天津市医疗器械质量监督检验中心 | Femoral hip stem fatigue test loading device |
| CN108387508A (en) * | 2018-01-25 | 2018-08-10 | 西北有色金属研究院 | A kind of experimental rig with metal fatigue and frictional behaviour detection function |
| CN108593475A (en) * | 2018-06-04 | 2018-09-28 | 辽宁工程技术大学 | Artificial knee joint meniscus erosive wear experimental bench |
| CN110024752A (en) * | 2019-05-22 | 2019-07-19 | 吉林大学 | A kind of fixture for insect leg joint friction test |
| CN110595892A (en) * | 2019-10-18 | 2019-12-20 | 影为医疗科技(上海)有限公司 | Adjustable femur model bone micromotion experimental device |
| CN113670595A (en) * | 2021-08-25 | 2021-11-19 | 天津市医疗器械质量监督检验中心 | Method for testing fatigue limit of tissue clamping device |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297091A (en) * | 2014-10-23 | 2015-01-21 | 桂林电子科技大学 | Novel artificial hip joint friction testing machine |
| CN104359780A (en) * | 2014-11-28 | 2015-02-18 | 济南大学 | Femoral head handle bulb frictional wear testing device |
| CN104990790A (en) * | 2015-07-07 | 2015-10-21 | 苏州热工研究院有限公司 | Clamp for sliding abrasion test |
| CN105223010A (en) * | 2015-10-12 | 2016-01-06 | 中国矿业大学 | A kind of parallel bionical knee-hip joint tester |
| CN105276354A (en) * | 2015-10-19 | 2016-01-27 | 中国矿业大学 | Self-lubricating structure of hip joint testing machine and working method of self-lubricating structure |
| CN105891036B (en) * | 2016-05-23 | 2018-08-17 | 西南交通大学 | A kind of sliding compound friction abrasion test device of punching and its method |
| CN105891036A (en) * | 2016-05-23 | 2016-08-24 | 西南交通大学 | Impacting-sliding composite frictional wear testing device and method thereof |
| CN107505192A (en) * | 2017-06-23 | 2017-12-22 | 天津市天津医院 | Acetabular bone simulation fixture and preparation method thereof |
| CN107727523A (en) * | 2017-10-18 | 2018-02-23 | 浙江工业大学 | A kind of multifunction manual hip joint abrasion tester |
| CN107727523B (en) * | 2017-10-18 | 2024-02-13 | 浙江工业大学 | Multifunctional artificial hip joint wear testing machine |
| CN108007684A (en) * | 2017-12-28 | 2018-05-08 | 天津市医疗器械质量监督检验中心 | Femoral hip stem fatigue test loading device |
| CN108007684B (en) * | 2017-12-28 | 2023-12-19 | 天津市医疗器械质量监督检验中心 | Fatigue test loading device for hip joint femoral stem |
| CN108387508A (en) * | 2018-01-25 | 2018-08-10 | 西北有色金属研究院 | A kind of experimental rig with metal fatigue and frictional behaviour detection function |
| CN108593475A (en) * | 2018-06-04 | 2018-09-28 | 辽宁工程技术大学 | Artificial knee joint meniscus erosive wear experimental bench |
| CN110024752A (en) * | 2019-05-22 | 2019-07-19 | 吉林大学 | A kind of fixture for insect leg joint friction test |
| CN110024752B (en) * | 2019-05-22 | 2023-10-24 | 吉林大学 | Clamp for insect leg joint friction test |
| CN110595892A (en) * | 2019-10-18 | 2019-12-20 | 影为医疗科技(上海)有限公司 | Adjustable femur model bone micromotion experimental device |
| CN113670595A (en) * | 2021-08-25 | 2021-11-19 | 天津市医疗器械质量监督检验中心 | Method for testing fatigue limit of tissue clamping device |
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Application publication date: 20130821 |