| 摘要 |
<p>#CMT# #/CMT# The multifold sprocket wheel has different sizes of annular gears for receiving a chain and for transmission of a tangential force passed by the chain on a hub of a rear wheel of a bicycle. A device is provided for changing the chain between each annular gear by an indexing mechanism. An aperture (5) is assigned in the function element of a tooth gap (7) of a smaller annular gear. #CMT#USE : #/CMT# Multifold sprocket wheel. #CMT#ADVANTAGE : #/CMT# The aperture is assigned in the function element of a tooth gap of a smaller annular gear, and hence ensures to keep the chain drive functional when large quantity of dirt passes through it. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a cross sectional view of a multifold sprocket wheel. 5 : Aperture 6a : Sprocket 7 : Tooth gap 8 : Rod 9a : Cross point.</p> |
