Artificial hip joint dynamic fatigue wear sample clamp and tester

Abstract

The invention relates to an artificial hip joint dynamic fatigue wear sample clamp and a tester. The clamp comprises a femoral head sample fixing part for driving femoral head samples to rotate and an acetabulum sample fixing part, wherein the acetabulum sample fixing part comprises a base and an inclined tray; and acetabulum samples are mounted on the base which is arranged in the inclined tray. The tester comprises a femoral head sample rotating part, a sample clamp and a sample loading part, which are positioned at the upper part of the tester, wherein the femoral head sample rotating part comprises a rotating motor and an upper spindle rotating under the driving of the motor; tail conical holes for mounting the femoral head samples are formed in the lower end part of the upper spindle; and the sample loading part comprises a loading motor, a speed reducer and a loading drive part for applying load to the acetabulum samples. The test clamp is simple in structure and convenient to install. The tester has the advantages that the structure is advanced, the control is accurate and the test data reliability is high.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a jig and a testing machine for dynamic fatigue wear testing of artificial hip joints. Background technique [0002] With the continuous acceleration of the pace of life and the increasing pressure of life, the number of people suffering from orthopedic diseases is on the rise year by year. Among the numerous bone diseases, hip joint diseases have attracted widespread attention due to the fact that the age range of the involved persons is expanding. At present, the most effective treatment for this type of disease is artificial hip transplantation. The artificial hip joint implanted in the human body plays the role of the original joint in the diseased part of the human body. However, due to the complex physiological environment inside the human body, and the selection of materials for artificial hip joints varies from metal, ceramics to high molecular polyethylene, etc....

AI Technical Summary

Problems solved by technology

The utility model has the advantage of using the upper sample fixture that can float up and down along the V-shaped guide rail to simulate the actual working state of the femur, and measuring the friction force during movement with a tension and pressure sensor, thereby improving the test accuracy. There is a large environmental difference between the femur in the fixture and the femur in the human body, and the combination of weights and tension and compression sensors cannot provide a dynamic continuous force

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