Patent ID: 8944205
Filing Date: 2015-02-03
Classification: B62M,H02K

Abstract:
1. A hub electric motor unit for a motor-driven or motor-assisted vehicle, the vehicle comprising a frame, a wheel having a hub and a wheel rim connected to the hub by a plurality of spokes; the hub electric motor unit comprising a hub shaft connectable to the frame of the vehicle, a stator unit mounted on the hub shaft, a rotor disposed around and coaxially with the hub shaft, a hub shell rotatably mounted on the hub shaft, wherein the hub shell comprises two cap members axially disposed on respective sides of the rotor, wherein each cap member comprises a connecting part for connecting a respective subset of the spokes and wherein the rotor comprises a plurality of magnetically active components including a plurality of permanent magnets, separated from each other by pole sections made from soft magnetic material, the magnetically active components together forming one or more uninterrupted magnetic flux paths of the rotor, and a tubular support structure defining a circumferential mounting surface for mounting the magnetically active components to the tubular support structure, wherein the hub shell comprises the tubular support structure and the cap members.