US 6,123,179 AGranted

Bicycle freewheel hub

AssigneeKun Teng Industry Co., Ltd.

InventorHubert Chen

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Abstract

A bicycle freewheel hub includes a hollow hub shell sleeved rotatably on a shaft, a cylindrical driving member sleeved rotatably on the shaft and disposed adjacent to the hub shell, and a clutch unit including first and second clutch members sleeved rotatably on the shaft. The first clutch member is coupled to the driving member. The second clutch member is coupled to the hub shell. Each of the clutch members has an annular end face which extends in a direction substantially perpendicular to the shaft. The annular end face of each of the clutch members has inclined teeth that are arranged annularly around the shaft and that project axially from the annular end face. The annular end face of the second clutch member confronts the annular end face of the first clutch member. The inclined teeth of the second clutch member engage the inclined teeth of the first clutch member when the driving member rotates in a first direction, and disengage therefrom when the driving member rotates in a second direction opposite to the first direction. A spring biases one of the first and second clutch members so as to keep interengagement of the first and second clutch members.

Claims12

Dependent claims

A bicycle freewheel hub comprising:

a shaft;
a hollow hub shell sleeved rotatably on said shaft and having first and second ends;
a cylindrical driving member sleeved rotatably on said shaft and having a first end disposed adjacent to said second end of said hub shell;
a clutch unit which includes first and second clutch members sleeved rotatably on said shaft, said first clutch member being coupled to said first end of said driving member and having an annular end face which extends in a direction substantially perpendicular to said shaft, said annular end face having inclined teeth that are arranged annularly around said shaft and that project axially from said annular end face, said second clutch member being coupled to said second end of said hub shell and having an annular end face which extends in a direction substantially perpendicular to said shaft and which confronts said annular end face of said first clutch member, said annular end face of said second clutch member having inclined teeth that are arranged annularly around said shaft and that project axially from said annular end face of said second clutch member to engage said inclined teeth of said first clutch member when said cylindrical driving member rotates in a first direction and to disengage therefrom when said cylindrical driving member rotates in a second direction opposite to said first direction;
and
spring means for biasing one of said first and second clutch members so as to keep interengagement of said first and second clutch members, wherein each of said first and second clutch members includes an annular disc which has two opposite end faces, one of which defines said annular end face and said inclined teeth, the other one of said two opposite end faces being substantially planar and extending perpendicularly to said shaft.

3 more elements

A bicycle freewheel hub comprising:

a shaft;
a hollow hub shell sleeved rotatably on said shaft and having first and second ends;
a cylindrical driving member sleeved rotatably on said shaft and having a first end disposed adjacent to said second end of said hub shell;
a clutch unit which includes first and second clutch members sleeved rotatably on said shaft, said first clutch member being coupled to said first end of said driving member and having an annular end face which extends in a direction substantially perpendicular to said shaft, said annular end face having inclined teeth that are arranged annularly around said shaft and that project axially from said annular end face, said second clutch member being coupled to said second end of said hub shell and having an annular end face which extends in a direction substantially perpendicular to said shaft and which confronts said annular end face of said first clutch member, said annular end face of said second clutch member having inclined teeth that are arranged annularly around said shaft and that project axially from said annular end face of said second clutch member to engage said inclined teeth of said first clutch member when said cylindrical driving member rotates in a first direction and to disengage therefrom when said cylindrical driving member rotates in a second direction opposite to said first direction;
and
spring means for biasing one of said first and second clutch members so as to keep interengagement of said first and second clutch members;
wherein said first end of said driving member has a first annular groove around said shaft to receive said first clutch member, said second end of said hub shell having a second annular groove disposed around said shaft and communicated with said first annular groove, said second annular groove receiving said second clutch member therein.

4 more elements

Dependencies are inferred from the claim text.