Bicycle crank set
AssigneeTien Hsin Industries Co., Ltd.
InventorDing-Jiun LIN
Life of this patent
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Abstract
A bicycle crank set is comprising a crank having at least one support portion protruding therefrom, a first lateral surface, a second lateral surface opposite to the first lateral surface; a first chain wheel located at the first lateral surface and having a second through hole; a second chain wheel located at the second lateral surface and having at least one threaded hole; and a screw bolt inserted outward through the second through hole and then the first through hole to be engaged with the threaded hole. Accordingly, the bicycle crank set is structurally simple and convenient in assembly and the head of the screw bolt is hidden at the inner side of the crank set to be aesthetic in appearance.
Claims4
A bicycle crank set for being mounted to a bicycle, comprising:
- a crank having a main body and at least one support portion extending outward from the main body, the at least support portion having a first lateral surface relatively close to the bicycle, a second lateral surface opposite to the first lateral surface, and a first through hole running through the first and second lateral surfaces;
- a first chain wheel located at the first lateral surface and having a second through hole corresponding to the first through hole;
- a second chain wheel located at the second lateral surface and having a threaded hole corresponding to the first through hole;
- and
- a screw bolt having a head portion and a body portion, the body portion having a thread formed on a periphery thereof, the body portion passing through the second through hole, the first through hole, and the threaded hole in order, and then the thread being engaged with the threaded hole, the body portion being substantially equal in length to the sum of the second through hole, the first through hole, and the threaded hole.
Dependencies are inferred from the claim text.