Method of manufacturing a rocker arm
AssigneeKoyo Corporation
InventorKazuyuki Kotani
Life of this patent
Estimating the term…
Abstract
A method of manufacturing a rocker arm includes blanking a piece of plate to obtain a base material for forming a rocker arm body, the base material being substantially U-shaped in plan view and having two protrusions which are substantially in parallel with each other. The base material is bent until the two protrusions are confronted substantially in parallel with each other, to provide a pair of side walls having a coupling portion between the side walls. Next, the coupling portion is curved between the side walls to provide a valve engaging portion, and the free end portions of the side walls are fixedly secured to the side walls of a pivot engaging member which is a plat plate having a semi-spherical portion formed by drawing.
Claims10
A method of manufacturing a rocker arm comprising the steps of:
- blanking a piece of plate to obtain a base material for forming a rocker arm body,
- said base material being substantially U-shaped in a plan view having two protrusions which are substantially in parallel with each other;
- bending said base material until said two protrusions are confronted substantially in parallel with each other, to provide a pair of side walls having a coupling portion between said side walls;
- curving said coupling portion between said side walls, to provide a valve engaging portion;
- and
- fixedly securing to the free end portions of said side walls a pivot engaging member which is a flat plate having a semi-spherical portion formed by drawing.
Dependencies are inferred from the claim text.