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Artificial hip joint fatigue testing device

A fatigue test, hip joint technology, applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of complex maintenance, high cost, high equipment price, etc., and achieve the effect of easy popularization and application, convenient machine use, and simple test process.

Active Publication Date: 2014-04-30
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because such devices are general-purpose or universal equipment, there are many types of mechanical tests covered, and the equipment is expensive
In addition, for fatigue tests such as artificial hip joints, which have the characteristics of low-frequency cycles (5 million times), running such tests on a general-purpose test device is expensive and complicated to maintain. Conducive to the development and reliability testing of artificial hip joints

Method used

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  • Artificial hip joint fatigue testing device
  • Artificial hip joint fatigue testing device
  • Artificial hip joint fatigue testing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, a kind of artificial hip joint fatigue testing device comprises frame 1, kinematic mechanism 2, loading mechanism 3 and test piece 4; Said kinematic mechanism 2 is fixed on the base 12 of frame 1 by screw, and said kinematic mechanism 2 The intermediate movable platform 7 is connected with the guide column 6 of the frame 1 through the first linear bearing 9, so that the intermediate movable platform 7 can slide up and down along the guide column 6; the loading mechanism 3 is fixed on the upper plate 5 of the frame 1 by screws; The lower end of the test piece 4 is fixed on the middle movable platform 7 of the moving mechanism 2 by screws, and the upper end of the test piece 4 is in contact with the friction-reducing component 8 in the loading mechanism 3 .

[0021] Such as figure 2 As shown, the structure of the frame ...

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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 [0001] The invention relates to a fatigue test device for implanted prosthesis in orthopedic surgery, in particular to an artificial hip joint fatigue test device. Background technique [0002] Artificial hip joint is an important supporting technology in orthopedic surgery. Artificial joint replacement is used to replace diseased or damaged hip joints, which can help patients restore joint motion and improve their quality of life. [0003] Fatigue performance is an important parameter in artificial hip prosthesis technology, which directly affects the reliability and long-term stability of the prosthesis. Both the International Organization for Standardization (ISO) and the American Society for Testing and Materials (ASTM) have formulated relevant in vitro test standards for the fatigue performance of artificial joints. The food and drug administrations of many countries in Europe and the United States regard fatigue performance testing as a mandatory testi...

Claims

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Application Information

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IPC IPC(8): G01N3/00
Inventor 华子恺潘邵斌张欢欢
Owner SHANGHAI UNIV
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