| 摘要 |
The hub has a hub shaft (1), a sleeve (2), a chain wheel carrier (3), and a ratchet mechanism (4) with drive and free wheel function. The mechanism consists of a ratchet carrier (5) several ratchets (6), a ratchet locking (7), and an elastic closed ring, which can be expanded in radial direction, and is especially. a helical spring ring (9). The use of several ratchets reduces the load on components, so that the mechanism can consist of a material lighter than steel, etc. titanium, magnesium, aluminum, or plastic especially alloys.
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