Dual camshaft structure and method for assembling dual camshaft structure

摘要

In a dual camshaft structure, an inner shaft provided with a variable cam is inserted into an outer shaft provided with a secured cam. In the dual camshaft structure, the secured cam is provided on a first cylindrical member, the first cylindrical member is secured to the outside of the outer shaft, the variable cam is provided on the second cylindrical member, and the second cylindrical member is installed at the outside of the first cylindrical member and is secured to the inner shaft by a connection member via a notch provided on the first cylindrical member and a notch provided on the outer shaft. Therefore, the rigidity of the dual camshaft structure can be ensured, and a slidable surface of a cam rotatable at the outside of the outer shaft can be held.

主权项

1. A dual camshaft structure, where an inner shaft provided with a variable cam is inserted into an outer shaft provided with a secured cam, wherein:
the secured cam is provided on a first cylindrical member; the first cylindrical member is secured to an outside of the outer shaft; the variable cam is provided on a second cylindrical member; and the second cylindrical member is rotatably installed at an outside of the first cylindrical member, so as to form a single unit, and is secured to the inner shaft by a connection member via a notch provided on the first cylindrical member and a notch provided on the outer shaft, wherein the single unit includes the first cylindrical member and the second cylindrical member, and the first cylindrical member is a single member, wherein the second cylindrical member is provided with a press-fitted portion which has a projection shape with an insertion hole into which the connection member is inserted, and the press-fitted portion is located directly adjacent to the variable cam along an axial direction of the outer shaft.