A knee assist device with automatic stiffness switching

Abstract

The invention discloses a knee joint power assisting device with an automatic rigidity switching function. The device mainly comprises a thigh supporting rod, a shank supporting rod, a guide rod, a slider, an elastic element, a sliding element and sliding supporting rods. The thigh supporting rod and the shank supporting rod are connected through a hinge, the slider and the thigh supporting rod are connected through a hinge, the lower end of the guide rod is hinged to the sliding element, the upper end of the guide rod is embedded in a slider sliding groove, and a rod cap is arranged at the top end of the guide rod is used for limiting; the guide rod is sleeved with the elastic element, and the two ends of the elastic element are defined between the slider and the lower end of the guide rod; the sliding element is connected with the shank supporting rod in a sliding mode; the sliding supporting rod is fixedly connected with the sliding element. By means of the device, automatic switching of knee joint rigidity of a supporting phase and a swinging phase is achieved in the walking process of lower limbs of people, and a power assisting effect can be better provided for a knee joint.

Description

technical field [0001] The invention relates to a novel mechanical exoskeleton device, in particular to a purely passive knee joint assisting device with automatic stiffness switching. Background technique [0002] In human activities, the knee joint is the part that bears the greatest burden on the human body, especially when the human body squats, the burden on the knee joint is particularly serious, and the knee joint is also very prone to fatigue, causing people's diseases such as arthritis, mechanical exoskeleton It is an effective tool to solve this problem. In the field of exoskeleton assisting, people always hope to obtain a purely passive knee assisting device, which does not require additional power structures, and only needs to be completed with spring energy storage originals; general passive knee assisting devices use springs, springs It can be compressed to produce a boosting effect when the human body squats down. However, there is a problem in this similar s...

AI Technical Summary

Problems solved by technology

In the field of exoskeleton assisting, people always hope to obtain a purely passive knee assisting device, which does not require additional power structures, and only needs to be completed with spring energy storage originals; general passive knee assisting devices use springs, springs It can be compressed when the human body is squatting to produce a boosting effect. However, there is a problem with this similar structure, which cannot solve the resistance problem caused by the bending of the knee joint when the lower limbs are in the swing phase.

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