Body frame for a saddle-type vehicle, and vehicle including same

摘要

A forged head pipe for a motorcycle frame is integrally formed and includes a main frame attachment portion, a pipe portion, and a lower extension extending downwardly from the pipe portion. A down frame attachment portion is provided on the lower extension, and is spaced away from the main frame attachment portion and the pipe portion. A down frame is welded to the down frame attachment portion by contacting the same without inserting the same. The down frame attachment portion is configured from a connecting portion, extending in parallel to the pipe portion, and an extension extending rearwardly from a lower end portion of the connecting portion. By eliminating an insertion socket, manufacturing cost is reduced, and welding quality is improved by spacing the down frame downwardly below the main frame attachment portion and the pipe portion, to which a high load is applied.

主权项

1. A vehicle body frame for a saddle type vehicle, said vehicle body frame comprising:
a head pipe for pivotally receiving a front fork therein which operatively supports a front wheel; a pair of left and right main frame sections connected to the head pipe and extending rearwardly in leftward and rightward directions; and a down frame section connected to the head pipe and extending downwardly therefrom; the head pipe including:
a pipe portion,a main frame attachment portion to which the main frame sections are respectively welded at front end portions thereof such that part of the main frame sections overlap with the pipe portion, where a main frame weld seam is formed between each of the main frame sections and the main frame attachment portion;a downward extension connected directly to and extending downwardly from the main frame attachment portion; anda down frame attachment portion to which the down frame section is welded at an upper end portion thereof, the down frame attachment portion having a substantial L-shape as viewed from a side view thereof, the down frame attachment portion including a substantially flattened connecting portion, wherein a down frame weld seam is formed between the down frame section and the down frame attachment portion, the down frame attachment portion being provided at a lower rear portion of the downward extension, and wherein the down frame weld seam is spaced apart from the main frame weld seam, and the main frame weld seam does not intersect or cross over the down frame weld seam, as viewed in the side view of the vehicle body frame.