Chain roller structure in chain driven vehicle
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsTomohiro Fuse, Kazuhiko Gogo
Life of this patent
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Abstract
A chain roller for supporting a chain when a rear wheel is lowered a given distance or more is mounted to a body frame. The chain roller is elastically deformable. The chain roller includes a hard rubber or hard resin roller having a plurality of axial holes like a lotus root. When a depression load of the chain acts on the roller, the roller is elastically deformed with the axial holes being depressed, thereby relaxing tension of the chain. In a modification, a shock absorber is provided between the body frame and a roller supporting member to relax the tension, or a roller supporting member having elasticity is mounted to the body frame to relax the tension. The absorptivity of displacement and shock can be easily improved with a simple structure.
Claims18
In a chain driven vehicle having a body frame, a swing arm vertically pivotably mounted at a front end to said body frame, a rear wheel rotatably mounted to a rear end of said swing arm, an engine located forward of said swing arm on said body frame, and a chain for transmitting a driving force of said engine to said rear wheel, a chain roller structure wherein the improvement comprises a chain roller mounted to said body frame for supporting said chain when said rear wheel is lowered a predetermined distance, said chain roller being elastically deformable upon contact with said chain and having a plurality of axial holes extending therethrough, said axial holes being of substantially triangular cross section.
In a chain driven vehicle having a body frame, a swing arm vertically pivotably mounted at a front end to said body frame, a rear wheel rotatably mounted to a rear end of said swing arm, an engine located forward of said swing arm on said body frame, and a chain for transmitting a driving force of said engine to said rear wheel, a chain roller structure wherein the improvement comprises:
- a roller supporting member vertically movably mounted to said body frame;
- a shock absorber connected between said body frame and said roller supporting member;
- and
- a chain roller mounted to said roller supporting member for supporting said chain when said rear wheel is lowered a predetermined distance, said chain roller being elastically deformable upon contact with said chain and having a plurality of axial holes extending therethrough, said axial holes being of substantially triangular cross section.
In a chain driven vehicle having a body frame, a swing arm vertically pivotably mounted at a front end to said body frame, a rear wheel rotatably mounted to a rear end of said swing arm, an engine located forward of said swing arm on said body frame, and a chain for transmitting a driving force of said engine to said rear wheel, a chain roller structure wherein the improvement comprises:
- a roller supporting member mounted to said body frame, said roller supporting member being elastically supported;
- and
- a chain roller mounted to said roller supporting member for supporting said chain when said rear wheel is lowered a predetermined distance, said chain roller being elastically deformable upon contact with said chain and having a plurality of axial holes extending therethrough, said axial holes being of substantially triangular cross section.
Dependencies are inferred from the claim text.