Patent ID: 8833202
Filing Date: 2014-09-16
Classification: F01L,F16H,Y10T

Abstract:
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.