| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rear hub for a bicycle which can measure driving force and is hardly affected by assembly accuracy. <P>SOLUTION: A rear hub 10 includes a hub spindle 20, a drive part 2, a hub shell 24, a first counter part 54, a second counter part 56, and a driving force measurement part 26. The drive part 22 is freely rotatably supported by the hub spindle 20 and can install a sprocket aggregate 80. The hub shell 24 is freely rotatably supported by the hub spindle 20 and rotation of the drive part 22 is communicated thereto. The first counter part 54 is provided for the drive part 22. The second counter part 56 is provided for the hub shell 24. The driving force measurement part 26 has a sensor 58. The sensor 58 can measure a gap or displacement of the gap between the first counter part and the second counter part 56. <P>COPYRIGHT: (C)2013,JPO&INPIT |
