| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve timing control device that is constituted of the reduced number of components compared to that of the prior art without damaging a function for restricting falling of a spiral spring to the outside.SOLUTION: A valve timing control device for an internal combustion engine comprises: a housing 5 to which a rotating force is transmitted from a crank shaft; a vane rotor 7 arranged in the housing in a relatively rotatable manner; and a spiral spring 33 for always energizing the vane rotor in one direction side of a rotating direction with respect to the housing. The vane rotor integrally has a cylindrical protrusion part 16 protruded from a front end surface 14a of a rotor 14 and extended to the outside of the housing. On the outer peripheral surface of the cylindrical protrusion part, an annular groove 35 recessed toward its radial inner side is formed. In the spiral spring, a first locking end part 33b is locked to the cylindrical protrusion and a second locking end part 33c is locked to the housing, and at the same time, a part of an inner-most peripheral part 33d is engaged and arranged in the annular groove.SELECTED DRAWING: Figure 4 |
