Active and passive joint prosthesis

Abstract

The invention provides an active and passive joint prosthesis mechanism, which comprises an active driving mechanism, a passive constraining mechanism, a knee joint shaft, an overrun clutch and the like. The active driving mechanism consists of a direct current servo motor, a reducer and a gear. The passive constraining mechanism consists of a direct current servo motor and a bevel gear shaft. The knee joint shaft is mounted on a U-shaped block consisting of a left side plate, a right side plate and a top plate. The knee joint shaft is provided with the bevel gear; a star wheel of the one-way overrun clutch and the shaft are fixedly connected by key connection; and the external ring of the clutch is fixedly connected with a cylindrical gear. The relationship between the active driving mechanism and the passive constraining mechanism is established by the mesh of two cylindrical gears, namely, one of the active driving mechanism and the passive constraining mechanism drives the star wheel of the clutch and the other one drives the external ring of the clutch. When a user of the prosthesis walks, under the control and coordination of a prosthesis control system, the active driving mechanism conducts an active driving function and the passive constraining mechanism conducts a passive constraining function.

Description

(1) Technical field [0001] The invention relates to the technical field of prosthetics and orthotics, in particular to an active and passive prosthetic knee joint. (2) Background technology [0002] Diseases, industrial injuries, traffic accidents and accidental injuries have caused a large number of lower limb amputees. These amputees have caused a lot of inconvenience to their work and life due to the loss of walking function. Using a wheelchair and using crutches are two ways to compensate for their lack of walking ability. Wheelchairs occupy a large area, and it is difficult to go up and down stairs. It is also inconvenient to use crutches to go up and down stairs and other sports. At the same time, the hands are needed to cooperate when walking, which takes up the functions of the hands. In addition, these two methods also have deficiencies in terms of decoration. Therefore, for lower limb amputees who meet the conditions for installing artificial limbs, they usually...

AI Technical Summary

Problems solved by technology

Wheelchairs occupy a relatively large area, and it is difficult to go up and down stairs, etc.

Using crutches is also inconvenient for going up and down stairs. At the same time, you need your hands to cooperate when walking, which takes up the functions of your hands.

In addition, these two methods also have shortcomings in terms of decoration.

Images