Body Frame
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorFumihiko Noichi
Life of this patent
Estimating the term…
Abstract
A body frame for a motorcycle includes a seat rail formed from a circular pipe that extends horizontally rearward from an upper rear end of a main frame. A backstay formed from a square pipe extends obliquely upward and rearward from a lower rear end of the main frame. A bent part formed at a rear end of the backstay faces the seat rail in the longitudinal direction. Projecting parts are formed on both sides of a concave groove formed in an upper surface of the backstay. The projecting parts are offset in the width direction with respect to a center line of the seat rail and the backstay to allow the seat rail and the backstay to be easily welded.
Claims15
A vehicle body frame comprising:
- a first pipe extending along an axial direction and including a curved surface part having an arc-shaped cross section;
- a second pipe extending along the axial direction and facing the curved surface part along a longitudinal direction, and including a projecting part offset outward in a width direction with respect to a center line of the first and second pipes;
- and
- a welding part for welding the curved surface part and the projecting part.
A body frame for a motorcycle comprising:
- a main frame;
- a seat rail that has a circular cross section and extends rearward from an upper rear part of the main frame;
- and
- a backstay that has a square cross section and extends rearward and upward from a lower rear part of the main frame to a connection with the seat rail,
- wherein projecting parts are formed on a surface of the backstay at the connection with seat rail, the projecting parts being welded to the seat rail.
Dependencies are inferred from the claim text.