Multi-gear cassette and damping device
AssigneeSRAM Deutschland GmbH
InventorHenrik Braedt
Life of this patent
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Abstract
The invention relates to a damping device on a multi-gear cassette for a rear wheel of a bicycle, wherein percussive forces produced by the chain members running from the slack span of the chain onto the sprocket are damped. This is achieved by damping the chain in the region of the chain run-in on the sprocket where no loads are borne. In one embodiment, a damping ring is provided for the purpose of supporting the chain link plates, and the tooth contour of the tooth flank which does not transmit load force is set back, and the tooth root space according to the invention is recessed toward the hub center. As such, when the chain is fed in to the sprocket, the chain link plate contacts the damping ring rather than the chain roller impacting the tooth flank or the tooth base.
Claims14
A multi-gear cassette for use with a roller chain of a bicycle, the multi-gear cassette comprising;
- a plurality of sprockets of varying diameters arranged coaxially about a cassette axis;
- and
- a damping element disposed between at least one adjacent pair of the plurality of sprockets that have different diameters, the damping element positioned to contact a chain link plate of the roller chain when the roller chain is engaged with one of the plurality of sprockets and the damping element is configured to not contact the chain link plate of the roller chain when the roller chain is running out of engagement with the one of the plurality of sprockets.
Dependencies are inferred from the claim text.