| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hub motor unit for an electric bicycle, which assists the pedalling force of a driver with a single variable speed unit to improve output characteristics of a motor, simplify a system and also reduce the weight. <P>SOLUTION: The hub motor unit 1 for being mounted to an electric bicycle, includes: a hollow shaft 5 disposed to a bicycle frame; the variable speed unit 11 including an input terminal 11a and an output terminal 11b, which are rotatably mounted to the hollow shaft, wherein a driven sprocket 21 is mounted to the input terminal; a hub housing 13; a hub cover 15 assembled to the hub housing 13; a motor unit 17 for supplying power to the variable speed unit via the input terminal by a control signal; and a variable speed operation unit 19 mounted on a variable speed shaft 25 mounted inside the hollow shaft, and operating the variable speed unit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
