Abstract
A walking assistance apparatus using a torque limiter was developed. We used the servo motor for hobby, it is relatively small, light weight, and included not only a motor and transmission gear, but also a driver and encoder. At first, we controlled the device using angle control method, according to the walking phase along to the mean data of able bodied people while walking. However, when the user stops walking suddenly or walk on outdoor various roads, the final gear was broken frequently. Because the gear was designed to break easily, to defend the motor from the inverse inputting overload torque. Then we developed a torque limiter mechanism in the final gear. This is a traction drive sandwiched a soft material plate between two circular disk. We carried out the experiment to measure the limit torques of eight kinds of the rubber material. In this paper, the results of the experiment were shown.
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