A dual channel variable damping hydraulic cylinder

Abstract

The invention discloses a double-channel variable damping hydraulic cylinder. The double-channel variable damping hydraulic cylinder comprises a cylinder body, a piston rod and a stopper body, whereinthe piston rod is movably connected with the cylinder body, the stopper body is arranged in the cylinder body, the stopper body comprises a fixed stopper, a first piston and a second piston which arerespectively arranged on both sides of the fixed stopper, matching holes which are in sliding connection with the piston rod are respectively formed in the first piston and the fixed stopper, the second piston is fixedly connected to the end of the piston rod, the first piston and the second piston respectively form a first cavity and a second cavity together with the fixed stopper, the first piston and the second piston are respectively connected with a first elastic piece and a second elastic piece which are arranged on both ends of the cylinder body, a first oil way and a second oil way are formed in the fixed stopper, and adjusting mechanisms which are used for adjusting the conduction caliber of the first oil way and the second oil way are respectively arranged on the first oil way and the second oil way. The double-channel variable damping hydraulic cylinder has the advantage of simple structure, and two-way damping adjustment of extension and retraction of the piston rod can berealized, thereby adjusting the speed of the knee joint swing phase and the stability of the support phase.

Description

technical field [0001] The invention relates to the field of medical rehabilitation equipment, in particular to a dual-channel variable damping hydraulic cylinder for a rehabilitation robot. Background technique [0002] The performance of a rehabilitation robot depends largely on the comfort and safety of the wearer. The comfort of the rehabilitation robot is mainly determined by the followability of the swing speed, because if the joint drive damping cannot be changed, the rehabilitation robot cannot change with the pace of the healthy limb, resulting in an asymmetrical gait and increased energy consumption of the patient. Creates a great sense of discomfort. At the same time, the stability of the rehabilitation robot during the support period is an important guarantee for walking safety. The traditional simple rehabilitation robot uses mechanical damping, and its size cannot be adjusted or automatically changed with the pace. Therefore, when the rehabilitation robot is ...

AI Technical Summary

Problems solved by technology

The comfort of the rehabilitation robot is mainly determined by the followability of the swing speed, because if the joint drive damping cannot be changed, the rehabilitation robot cannot change with the pace of the healthy limb, resulting in an asymmetrical gait and increased energy consumption of the patient. cause great discomfort

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