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Version vom 22. November 2019, 08:16 Uhr
, 22. November 2019→Stufen in Reihe; Shimano Nexus Siebengang: Anfang
(→Alle drei Stufen rotierend: übersetzt) |
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===Stufen in Reihe; Shimano Nexus Siebengang=== | ===Stufen in Reihe; Shimano Nexus Siebengang=== | ||
Mehr als eine Planetenstufe kann auch in Reihe gebaut werden, was die Einschränkungen von einfach abgestuften Planetengetrieben überwindet. Dieses System wird bei Naben neuerer Bauart verwendet. | |||
Die ersten verbreiteten Naben, die diese Form der Abstufung in Reihe nutzen, waren die [[Shimano Nexus Siebengang-Naben]], | |||
This hub uses two stages. The first stage gears down, and the second, up. Each stage has two-part compound planet gears and two sun gears, offering two different ratios, or a unity ratio. In the middle three of the hub’s seven gears, power passes through both stages, and so the hub does not use the unity ratios of both stages at once; rather, it achieves a near-unity ratio by gearing down and then up through two ratios that are nearly complementary, avoiding an awkward shift. | This hub uses two stages. The first stage gears down, and the second, up. Each stage has two-part compound planet gears and two sun gears, offering two different ratios, or a unity ratio. In the middle three of the hub’s seven gears, power passes through both stages, and so the hub does not use the unity ratios of both stages at once; rather, it achieves a near-unity ratio by gearing down and then up through two ratios that are nearly complementary, avoiding an awkward shift. | ||