Multiaxial artificial joints tester

Abstract

The invention discloses a multiaxial artificial joints tester, which comprises a timber frame. A central support, which is equipped with a cambered seat ring, is arranged at the middle of the timber frame. A spherical base, which is arranged on the cambered seat ring, is equipped with a solution basin. A ball cup is sleeved in the solution basin. A moving platform is fixed to the rim of the solution basin. A plurality of upper spherical hinges are disposed at the bottom of the moving platform. The bottom plate is equipped with a plurality of lower spherical hinges corresponding with the upperspherical hinges. A electric cylinder is obliquely connected between the upper spherical hinges and the lower spherical hinges. The cotyle matching the articular head is disposed above the ball cup. A guide block is disposed above the cotyle. A tension transducer is connected between the cotyle and the guide block. The guide block is disposed inside a guide sleeve. The guide sleeve is equipped with a hydraulic cylinder. The piston rod of the hydraulic cylinder is connected with the guide block. A heating device is disposed inside the solution basin. The top board is equipped with a temperature controller. The tester provided by the invention has the advantages of simple and compact structure, good simulation effect, convenient operation and low cost.

Description

technical field [0001] The invention relates to an artificial joint testing machine, in particular to a multi-axis artificial joint testing machine suitable for simulating the actual movement of human hip joints and performing friction and wear tests on artificial joint materials. 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 the human body. At the same time, because normal human bones are constantly adjusting their appea...

AI Technical Summary

Problems solved by technology

Among them, the pendulum shaft type mainly relies on the relative movement between the base and the inclined plane base to simulate the swing action of the hip joint in three different planes, which is an early testing machine; the pin-on-disk type friction and wear testing machine performs friction in the form of sliding contact. Wear test, through the relative motion formed between the disc and the test sample processed into a pin shape to study the friction performance of materials and the lubrication performance of synovial fluid, is currently a commonly used testing machine for artificial joint tribology. Although these two types of testing machines It can simulate the movement of the human hip joint, but the simulation method is quite different from the actual movement mode of the human hip joint

The multi-axis type mainly simulates the motion form of the artificial hip joint by synthesizing the individual motions formed by different shaft systems. Multi-axis artificial hip joint simulation test machine, etc., but its structure is complicated and the cost is high

At the same time, after various investigations and studies, it was found that there has been no relevant report on the development of this kind of artificial hip joint simulation test machine in China.

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