Air cylinder self-resetting type hip joint test machine

Abstract

The invention relates to an air cylinder self-resetting type hip joint test machine, which comprises a framework, wherein the framework consists of a top plate, a bottom plate and a strut, a support frame is arranged in the framework, a transmission shaft is fixedly arranged in the support frame, a lower cam, a worm wheel, a middle cam and an upper cam are sequentially arranged on the transmission shaft, a cambered surface bearing seat is arranged above the support frame, a spherical surface base seat anastomotic with the cambered surface of the cambered surface bearing seat is arranged on the cambered surface bearing seat, a solution basin is arranged on the spherical surface base seat, a joint head ball seat embedded in the spherical surface base seat is arranged in the solution basin, a moving platform fixed with the basin edge of the solution basin is arranged on the solution basin, the moving platform is respectively connected with three cams through a steel wire traction device and an air pressure transmission device, a hydraulic cylinder is arranged on the top plate, a piston rod of the hydraulic cylinder passes through the top plate, a temperature controller for controlling the temperature in the solution basin is arranged on the top plate, and a ball propping pin propping on the rotating shaft is arranged on the bottom plate. The air cylinder self-resetting type hip joint test machine has the advantages that the structure is compact, the price is low, the operation is convenient, and the practical movement work condition of the hip joint of the human body can be correctly simulated in test room environment.

Description

technical field [0001] The invention relates to an artificial joint testing machine, in particular to a cylinder self-resetting type that can correctly simulate the actual motion conditions of the human hip joint in a laboratory environment and can reliably test the biotribological characteristic parameters of artificial joint materials Hip 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 Load shocks and abrasions that may be several times the weight of the human body. At the sam...

AI Technical Summary

Problems solved by technology

The MK department of the University of Leeds and the University of Durham in the United Kingdom manufactured a multi-axis artificial hip joint simulation test machine, but the swing on the coronal plane was omitted in the design. Axial type artificial hip joint simulation testing machine, but due to the characteristics of the spring itself, the transmission is not stable. As the use time increases, the plastic deformation of the spring increases and the spring force decreases, and the size of the spring force is not easy to measure

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