Hip joint testing machine based on steel rope drive

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 [0001] The invention relates to an artificial joint testing machine, in particular to a wire rope transmission-based machine that can correctly simulate the actual motion conditions of human hip joints in a laboratory environment and can reliably test the biotribological characteristic parameters of artificial joint materials. Artificial joint testing machine. Background technique [0002] As human society enters the aging stage, various joint diseases related to aging, such as femur fractures, arthritis and other diseases, will occur in large numbers, so the demand for artificial joints will also increase day by day. At present, about 30 million people in the world have been implanted with artificial joints, and the annual replacement volume is about 2 million. Artificial joints are subjected to severe stress in the body, such as artificial hip joints, which have to withstand about 3.6×10 6 Load shocks and abrasions that may be several times the weight of ...

AI Technical Summary

Problems solved by technology

The pin-on-disk friction and wear testing machine is a conventional test equipment for artificial joint tribology. It conducts friction and wear tests in the form of sliding contact, and studies the friction performance and The lubricating properties of synovial fluid usually use three contact methods, but the contact methods of this type of testing machine are quite different from the movement methods of human hip joints

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