초록 ▼

A generally open, welded-up type of motorcycle frame wherein the pivot axis for the rear wheel suspension system is disposed forwardly of the rear end of the frame so as to provide a large degree of suspension travel with small angular movements and without necessitating a large wheel base. The cons

A generally open, welded-up type of motorcycle frame wherein the pivot axis for the rear wheel suspension system is disposed forwardly of the rear end of the frame so as to provide a large degree of suspension travel with small angular movements and without necessitating a large wheel base. The construction also minimizes torsional bending and sheering forces on the frame members that support the rear wheel.

대표청구항 ▼

[ What is claimed is:] [1.] A frame assembly for a motorcycle comprised of a headpipe for dirigibly supporting a front fork and a front wheel journaled thereby, a main tube connected at its forward end to an upper portion of said headpipe and extending rearwardly and downwardly therefrom, a down tub

[ What is claimed is:] [1.] A frame assembly for a motorcycle comprised of a headpipe for dirigibly supporting a front fork and a front wheel journaled thereby, a main tube connected at its forward end to an upper portion of said headpipe and extending rearwardly and downwardly therefrom, a down tube, said down tube being affixed at a forwardmost end to said headpipe below said main tube and extending downwardly and rearwardly from said headpipe, said main tube and said down tube terminating contiguous to a rear wheel and in spaced vertical relationship to each other, a vertically extending frame member interconnecting the rear ends of said main tube and said down tube to form a closed configuration in side elevational view, and means for defining a fixed pivot axis for a rear wheel suspension unit spaced forwardly of the rear ends of said main tube and said down tube and said vertically extending frame member, said fixed pivot axis lying at a vertical height between said rear ends of said main tube and said down tube and within the closed configuration of said frame in side elevation.