| 摘要 |
The present invention provides a chain wheel assembly and chain wheel device using it, wherein the chain wheel device includes a driver, a switching sleeve, plural chain wheels with different diameter sizes, plural connectors, and a fastener. Therein, the driver is connected to a wheel hub of a back wheel of a bicycle for transmitting a torque. One end of the switching sleeve is screwed to the driver. The chain wheels, axially stacked from the largest one to the smallest one, are disposed in a direction from the driver toward the switching sleeve, with sprockets disposed on the periphery of each chain wheel, respectively, for optionally engaging chain. The ring-shaped connectors are coupled between each two of the chain wheels, respectively. The fastener is screwed to the other end of the switching sleeve for axially fixing the switching sleeve. |
| 主权项 |
1. A chain wheel assembly installed on an installation assembly disposed on a wheel hub of a back wheel of a bicycle, whereby the chain wheel assembly engages a chain, wherein the chain wheel assembly comprises:
plural chain wheels with different diameter sizes, axially stacked from the largest one to the smallest one and disposed on the installation assembly, with plural sprockets disposed on the periphery of each of the chain wheels for optionally engaging the chain; and plural connectors, formed in a ring shape and coupled between each two of the chain wheels, respectively. |
