CN103760006A - Artificial hip joint fatigue testing device - Google Patents
Artificial hip joint fatigue testing device Download PDFInfo
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- CN103760006A CN103760006A CN201410000359.9A CN201410000359A CN103760006A CN 103760006 A CN103760006 A CN 103760006A CN 201410000359 A CN201410000359 A CN 201410000359A CN 103760006 A CN103760006 A CN 103760006A
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Abstract
The invention relates to an artificial hip joint fatigue testing device. The artificial hip joint fatigue testing device comprises a framework, a moving mechanism, a loading mechanism and a test piece, wherein the framework is connected with the moving mechanism by screws; the loading mechanism is fixed on the framework; the test piece is positioned between the loading mechanism and the moving mechanism; the loading mechanism is internally provided with a force sensor and a thread adjusting mechanism, and is used for determining and adjusting load force on line; a motor drives a connecting rod mechanism so as to enable a middle moving platform to move up and down in a reciprocating mode; a spring is loaded on the upper part of the middle moving platform so as to test the prosthetic body fatigue performance in the motion state. The testing device provided by the invention can simulate the motion situation of a human body by the reciprocating motion, can test the artificial hip joint prosthetic body fatigue performance under different load conditions, and is low in manufacturing and maintaining cost, convenient to operate and easy to popularize and apply.
Description
Technical field
The present invention relates to the fatigue test device of orthopaedic srugery's implanting prosthetic, specifically, is a kind of artificial hip joint fatigue test device.
Background technology
Artificial hip joint is support technology important in orthopaedic srugery, by artificial joint replacement, in order to substitute the hip joint of pathology or damage, can help patient to recover joint motions, improves its quality of life.
Fatigue behaviour is an important parameter index in artificial hip prosthesis's technology, directly affects reliability and the long-time stability of prosthese.International Organization for Standardization and U.S. material and test association (ASTM) have all formulated the outer testing standard of dependent body for the fatigue behaviour of joint prosthesis.American-European multinational Food and Drug Administration is the compulsory test project before clinical use using fatigue property test as joint prosthesis all.
Fatigue experimental machine, as the execution carrier of the external testing fatigue of artificial hip joint and experiment, is the key device in artificial wide solution joint designs and reliability evaluation.At present, the evaluation of artificial hip joint fatigue behaviour is mainly by universal business fatigue experimental machine.Because such device is universal or universal type equipment, the mechanics test-types that covers numerous, equipment price is high.In addition, for torture tests such as artificial hip joints, it has the features such as low frequency cycle (<5Hz) and high cycle index (>500 ten thousand times), so the cost that moves such test on Universal testing device is high and safeguard complexity, is unfavorable for research and development and the reliability testing of artificial hip joint.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of artificial hip joint fatigue test device is provided.This machine can, by rotation top handle, change the decrement of spring, and then be adjusted in the pressure in test process, and show by pressure transducer.Before test process, on prosthese, stick foil gauge, after test completes, by the measurement of foil gauge being obtained to the fatigue properties of test prosthese.
The present invention's design is: fatigue tester comprises board framework, motion module, time module and load-on module.Motion module is fixed on by screw on the base plate of frame module by motor and bearing seat, and the intermediate active platform of motion module is connected with three guide upright posts of frame module by linear bearing, and intermediate active platform can be slided up and down along guide upright post.In test specimen module, femoral stem container is fixed on intermediate active platform by screw, and test specimen module top contacts with the antifriction mechanism in load-on module by type femoral bone end prosthesis.Load-on module is fixed on the upper flat plate of framework by screw by spring spool.
For achieving the above object, the technical scheme that the present invention takes is:
An artificial hip joint fatigue test device, comprises framework, motion, load maintainer and test specimen; Described motion is fixed on by screw on the base of framework, and the intermediate active platform of described motion is connected with the guide upright post of framework by the first linear bearing, and intermediate active platform can be slided up and down along guide upright post; Described load maintainer is fixed on the upper flat plate of framework by screw; Described test specimen lower end is fixed on by screw on the intermediate active platform of motion, and test specimen upper end contacts with the antifriction parts in load maintainer.Further, the structure of described framework comprises upper flat plate, guide upright post, base, round nut and fixed cover, three guide upright posts are vertically fixed on base by fixed cover, the center of three guide upright posts lays respectively on the summit of imaginary equilateral triangle, and described upper flat plate is fixed on the top of three guide upright posts by round nut.
Further, the structure of described motion comprises intermediate active platform, the first linear bearing, bottom bearings, motor, connecting rod, fork, roller, loose slot and crank; Described crank is connected with the output shaft of motor, between fork and crank, by connecting rod, is connected, and fork and intermediate active platform form and are connected, fork lower end connection bottom bearings by the roller of fork upper end being positioned in the loose slot of intermediate active platform bottom; In the process of motion, the rotation of motor passes to fork by output shaft, due to the swing on fork top, via roller, controls pumping of intermediate active platform, and simulates thus the motion of human body.
Further, the structure of described load maintainer comprises top handle, top set collar, orienting lug, power sensor, first piston, spring, the second piston, power transmission lever, spring spool, the second linear bearing, surface bearing, nahlock and annular block; The top of spring spool is being connected by screw top set collar, and top handle, through top set collar, contacts with pressure transducer upper end; Spring spool inside is placed with a spring, and there is first piston spring upper end, and first piston upper end and pressure transducer lower end are threaded connection, and spring lower end is connected with the second piston, and the second piston lower end connects power transmission lever, termination antifriction parts under power transmission lever; Second linear bearing is fixed by screw in spring spool lower end, and power transmission lever is passed the second linear bearing, and moves up and down under the guiding of the second linear bearing; In antifriction parts, surface bearing one end contacts with power transmission lever, and the other end contacts with nahlock, and annular block withstands nahlock be fixed by screws in power transmission lever; Intermediate active platform moves up and down and drives test specimen and power transmission lever to move up and down, and then be spring-compressed, produce loading force, by the decrement of rotating tip handle control spring, and regulating the load in test process with this, institute's imposed load is read by pressure transducer.
Further, the structure of described test specimen comprises femoral stem container, intermediate medium, type femoral bone end prosthesis; Type femoral bone end prosthesis is arranged in femoral stem container with attitude and the position requiring by intermediate medium.
Compared with prior art, the present invention has following outstanding substantive distinguishing features and advantage significantly:
Apparatus of the present invention, by the motion conditions of the anthropomorphic body of reciprocating mould, can be tested in different loads situation, the fatigue properties of prosthese, and test process is simple, and machine is easy to use, is easy to apply.
Accompanying drawing explanation
Fig. 1 is proving installation structural drawing of the present invention.
Fig. 2 is proving installation frame construction drawing of the present invention.
Fig. 3 is proving installation motion structural drawing of the present invention.
Fig. 4 is proving installation load maintainer structural drawing of the present invention.
Fig. 5 is proving installation test specimen structural drawing of the present invention.
Embodiment
Below in conjunction with accompanying drawing, to of the present invention, there is embodiment and be described further.
As shown in Figure 1, a kind of artificial hip joint fatigue test device, comprises framework 1, motion 2, load maintainer 3 and test specimen 4; Described motion 2 is fixed on by screw on the base 12 of framework 1, and the intermediate active platform 7 of described motion 2 is connected with the guide upright post 6 of framework 1 by the first linear bearing 9, and intermediate active platform 7 can be slided up and down along guide upright post 6; Described load maintainer 3 is fixed on the upper flat plate 5 of framework 1 by screw; Described test specimen 4 lower ends are fixed on by screw on the intermediate active platform 7 of motion 2, and test specimen 4 upper ends contact with the antifriction parts 8 in load maintainer 3.
As shown in Figure 2, the structure of described framework 1 comprises upper flat plate 5, guide upright post 6, base 12, round nut 13 and fixed cover 35, three guide upright posts 6 are vertically fixed on base 12 by fixed cover 35, the center of three guide upright posts 6 lays respectively on the summit of imaginary equilateral triangle, and described upper flat plate 5 is fixed on the top of three guide upright posts 6 by round nut 13.
As shown in Figure 3, the structure of described motion 2 comprises intermediate active platform 7, the first linear bearing 9, bottom bearings 10, motor 11, connecting rod 14, fork 15, roller 16, loose slot 17 and crank 18; Described crank 18 is connected with the output shaft of motor 11, fork 15 is connected by connecting rod 14 with 18, crank, fork 15 is connected by the roller 16 of fork 15 upper ends being positioned over to the interior formation of loose slot 17 of intermediate active platform 7 bottoms with intermediate active platform 7, and fork 15 lower ends connect bottom bearings 10; In the process of motion, the rotation of motor 11 passes to fork 15 by output shaft, due to the swing on fork 15 tops, via roller 16, controls pumping of intermediate active platform 7, and simulates thus the motion of human body.
As shown in Figure 4, the structure of described load maintainer 3 comprises top handle 19, top set collar 20, orienting lug 21, power sensor 22, first piston 23, spring 24, the second piston 25, power transmission lever 26, spring spool 27, the second linear bearing 28, surface bearing 29, nahlock 30 and annular block 31; The top of spring spool 27 is being connected by screw top set collar 20, and top handle 19, through top set collar 20, contacts with pressure transducer 22 upper ends; Spring spool 27 inside are placed with a spring 24, there is first piston 23 spring 24 upper ends, first piston 23 upper ends and pressure transducer 22 lower ends are threaded connection, spring 24 lower ends are connected with the second piston 25, the second piston 25 lower ends connect power transmission lever 26,26 times termination antifriction parts 8 of power transmission lever; Second linear bearing 28 is fixed by screw in spring spool 27 lower ends, and power transmission lever 26 is passed the second linear bearing 28, and moves up and down under the guiding of the second linear bearing 28; In antifriction parts 8, surface bearing 29 one end contact with power transmission lever 26, and the other end contacts with nahlock 30, and annular block 31 withstands nahlock 30 be fixed by screws in power transmission lever 26; Intermediate active platform 7 moves up and down and drives test specimen 4 and power transmission lever 26 to move up and down, and then be spring 24 compressions, produce loading force, by the decrement of rotating tip handle 19 control springs 24, and regulating the load in test process with this, institute's imposed load is read by pressure transducer 22.
As shown in Figure 5, the structure of described test specimen 4 comprises femoral stem container 32, intermediate medium 33, type femoral bone end prosthesis 34; Type femoral bone end prosthesis 34 is arranged in femoral stem container 32 with attitude and the position requiring by intermediate medium 33.
Claims (5)
1. an artificial hip joint fatigue test device, comprises framework (1), motion (2), load maintainer (3) and test specimen (4); It is characterized in that: described motion (2) is fixed on the base (12) of framework (1) by screw, the intermediate active platform (7) of described motion (2) is connected with the guide upright post (6) of framework (1) by the first linear bearing (9), and intermediate active platform (7) can be slided up and down along guide upright post (6); Described load maintainer (3) is fixed on the upper flat plate (5) of framework (1) by screw; The intermediate active platform (7) that motion (2) is fixed on by screw in described test specimen (4) lower end is upper, and test specimen (4) upper end contacts with the antifriction parts (8) in load maintainer (3).
2. a kind of artificial hip joint fatigue test device according to claim 1, it is characterized in that, the structure of described framework (1) comprises upper flat plate (5), guide upright post (6), base (12), round nut (13) and fixed cover (35), three guide upright posts (6) are vertically fixed on base (12) by fixed cover (35), the center of three guide upright posts (6) lays respectively on the summit of imaginary equilateral triangle, and described upper flat plate (5) is fixed on the top of three guide upright posts (6) by round nut (13).
3. a kind of artificial hip joint fatigue test device according to claim 1, it is characterized in that, the structure of described motion (2) comprises intermediate active platform (7), the first linear bearing (9), bottom bearings (10), motor (11), connecting rod (14), fork (15), roller (16), loose slot (17) and crank (18); Described crank (18) is connected with the output shaft of motor (11), between fork (15) and crank (18), by connecting rod (14), be connected, fork (15) is connected by the roller (16) of fork (15) upper end being positioned over to interior formation of loose slot (17) of intermediate active platform (7) bottom with intermediate active platform (7), and fork (15) lower end connects bottom bearings (10); In the process of motion, the rotation of motor (11) passes to fork (15) by output shaft, due to the swing on fork (15) top, via roller (16), controls pumping of intermediate active platform (7), and simulates thus the motion of human body.
4. a kind of artificial hip joint fatigue test device according to claim 1, it is characterized in that, the structure of described load maintainer (3) comprises top handle (19), top set collar (20), orienting lug (21), power sensor (22), first piston (23), spring (24), the second piston (25), power transmission lever (26), spring spool (27), the second linear bearing (28), surface bearing (29), nahlock (30) and annular block (31); The top of spring spool (27) is being connected by screw top set collar (20), and top handle (19), through top set collar (20), contacts with pressure transducer (22) upper end; Spring spool (27) inside is placed with a spring (24), there is first piston (23) spring (24) upper end, first piston (23) upper end and pressure transducer (22) lower end are threaded connection, spring (24) lower end is connected with the second piston (25), the second piston (25) lower end connects power transmission lever (26), the lower termination antifriction parts (8) of power transmission lever (26); Second linear bearing (28) is fixed by screw in spring spool (27) lower end, and power transmission lever (26) is passed the second linear bearing (28), and moves up and down under the guiding of the second linear bearing (28); In antifriction parts (8), surface bearing (29) one end contacts with power transmission lever (26), and the other end contacts with nahlock (30), and annular block (31) withstands nahlock (30) be fixed by screws in power transmission lever (26); Intermediate active platform (7) moves up and down and drives test specimen (4) and power transmission lever (26) to move up and down, and then be spring (24) compression, produce loading force, by the decrement of rotating tip handle (19) control spring (24), and regulating the load in test process with this, institute's imposed load is read by pressure transducer (22).
5. a kind of artificial hip joint fatigue test device according to claim 1, is characterized in that, the structure of described test specimen (4) comprises femoral stem container (32), intermediate medium (33), type femoral bone end prosthesis (34); Type femoral bone end prosthesis (34) is arranged in femoral stem container (32) with attitude and the position requiring by intermediate medium (33).
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| CN201410000359.9A CN103760006B (en) | 2014-01-02 | 2014-01-02 | A kind of artificial hip joint fatigue test device |
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| CN201410000359.9A CN103760006B (en) | 2014-01-02 | 2014-01-02 | A kind of artificial hip joint fatigue test device |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104007029A (en) * | 2014-05-27 | 2014-08-27 | 华南理工大学 | Dynamic mechanical experimental device and method for tissue engineering scaffold |
| CN104359780A (en) * | 2014-11-28 | 2015-02-18 | 济南大学 | Femoral head handle bulb frictional wear testing device |
| 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 |
| CN105157964A (en) * | 2015-07-06 | 2015-12-16 | 上海大学 | Fatigue test device for orthopaedic implant apparatuses |
| CN105223010A (en) * | 2015-10-12 | 2016-01-06 | 中国矿业大学 | A kind of parallel bionical knee-hip joint tester |
| CN105300672A (en) * | 2015-10-05 | 2016-02-03 | 上海大学 | Alternating load stepless adjustment type spinal column inner fixing device external fatigue test machine |
| CN105891035A (en) * | 2016-04-02 | 2016-08-24 | 上海大学 | Frictional wear testing device of orthopaedic implantation instrument |
| CN106053045A (en) * | 2016-07-08 | 2016-10-26 | 上海大学 | Hip joint angle measurement apparatus |
| CN107702978A (en) * | 2017-09-22 | 2018-02-16 | 赵金忠 | A kind of external bionical power of shoulder joint loads and its Function detection experiment porch |
| 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 |
| 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 |
| CN108548773A (en) * | 2018-03-30 | 2018-09-18 | 河海大学 | Detect the auxiliary device and its application method of reinforcing bar stainless property under by curved state |
| CN108918009A (en) * | 2018-08-15 | 2018-11-30 | 上海健康医学院 | A kind of hysteroscope stapler pulls the measuring device and measuring method for hitting power and closing force |
| CN111650041A (en) * | 2020-06-09 | 2020-09-11 | 哈尔滨工业大学 | Femur static compression and compression-compression fatigue test method |
| CN113252328A (en) * | 2021-05-13 | 2021-08-13 | 重庆理工大学 | Exoskeleton fatigue life testing device |
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Cited By (25)
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| CN104007029B (en) * | 2014-05-27 | 2017-01-25 | 华南理工大学 | Dynamic mechanical experimental device and method for tissue engineering scaffold |
| CN104007029A (en) * | 2014-05-27 | 2014-08-27 | 华南理工大学 | Dynamic mechanical experimental device and method for tissue engineering scaffold |
| CN104359780A (en) * | 2014-11-28 | 2015-02-18 | 济南大学 | Femoral head handle bulb frictional wear testing device |
| CN105157964A (en) * | 2015-07-06 | 2015-12-16 | 上海大学 | Fatigue test device for orthopaedic implant apparatuses |
| 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 |
| 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 |
| CN105300672A (en) * | 2015-10-05 | 2016-02-03 | 上海大学 | Alternating load stepless adjustment type spinal column inner fixing device external fatigue test machine |
| CN105300672B (en) * | 2015-10-05 | 2018-01-02 | 上海大学 | The external fatigue tester of alternate load stepless adjustable internal fixation of spine device |
| CN105223010A (en) * | 2015-10-12 | 2016-01-06 | 中国矿业大学 | A kind of parallel bionical knee-hip joint tester |
| CN105891035A (en) * | 2016-04-02 | 2016-08-24 | 上海大学 | Frictional wear testing device of orthopaedic implantation instrument |
| CN105891035B (en) * | 2016-04-02 | 2019-02-22 | 上海大学 | A kind of friction-wear detecting apparatus of orthopaedics implantation instrument |
| CN106053045A (en) * | 2016-07-08 | 2016-10-26 | 上海大学 | Hip joint angle measurement apparatus |
| CN106053045B (en) * | 2016-07-08 | 2019-12-06 | 上海大学 | Hip joint angle measuring device |
| 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 |
| CN107702978A (en) * | 2017-09-22 | 2018-02-16 | 赵金忠 | A kind of external bionical power of shoulder joint loads and its Function detection experiment porch |
| CN107702978B (en) * | 2017-09-22 | 2024-03-19 | 上海逸动医学科技有限公司 | In-vitro shoulder joint bionic force loading and function detection experiment platform thereof |
| 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 |
| CN108548773A (en) * | 2018-03-30 | 2018-09-18 | 河海大学 | Detect the auxiliary device and its application method of reinforcing bar stainless property under by curved state |
| CN108918009A (en) * | 2018-08-15 | 2018-11-30 | 上海健康医学院 | A kind of hysteroscope stapler pulls the measuring device and measuring method for hitting power and closing force |
| CN108918009B (en) * | 2018-08-15 | 2023-12-05 | 上海健康医学院 | Device and method for measuring pulling force and closing force of endoscopic stapler |
| CN111650041A (en) * | 2020-06-09 | 2020-09-11 | 哈尔滨工业大学 | Femur static compression and compression-compression fatigue test method |
| CN111650041B (en) * | 2020-06-09 | 2021-07-13 | 哈尔滨工业大学 | Femur static compression and compression-compression fatigue test method |
| CN113252328A (en) * | 2021-05-13 | 2021-08-13 | 重庆理工大学 | Exoskeleton fatigue life testing device |
| CN113252328B (en) * | 2021-05-13 | 2022-10-18 | 重庆理工大学 | Exoskeleton fatigue life testing device |
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