Patent ID: 8960712
Filing Date: 2015-02-24
Classification: A61G,B60K,B60L,B60Y,H02K,Y02T

Abstract:
1. A power-assisted wheel detachably mountable on a wheelchair, comprising: an axle to be supported on a frame of the wheelchair; a motor mounted on the axle; a hub including a wheel hub mounted on the axle and a handrim base section supported displaceably relative to the wheel hub; and a rotational displacement detection mechanism configured to detect a rotational displacement of the handrim base section relative to the wheel hub and having a center of rotation coinciding with an axle center of the motor, wherein the rotational displacement detection mechanism includes a magnetized section, a magnet and a detection element to detect magnetism generated by the magnetized section magnetized with an intensity corresponding to a displacement amount in a rotating direction relative to the magnet, and one of the magnetized section and the magnet is mounted on the wheel hub and the other is mounted on the handrim base section.