| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve opening/closing timing control device precisely formed with an oil passage, with a low cost.SOLUTION: A valve opening/closing timing control device 1 includes: an advance chamber 5a and a retard chamber 5b formed by partitioning a fluid pressure chamber 5 formed between a driving side rotator 12 and a driven side rotator 3 disposed on an inner peripheral side of the driving side rotator 12 so as to relatively rotate, with a partitioning portion 6 provided on an outer peripheral side of the driven side rotator 3; an advance channel 11a communicating to the advance chamber 5a; and a retard channel 11b communicating to the retard chamber 5b. The driven side rotator 3 is formed so as to have a cylindrical first member 3a provided with the partitioning portion 6, and a cylindrical second member 3b provided on the same rotation axis X as the first member 3a, and having a part superimposed on the first member 3a at least on the inside in a diametrical direction of the first member 3a out of the diametrical direction and an axial direction. The advance channel 11a and the retard channel 11b are formed so as to penetrate a boundary portion 30 between the first member 3a and the second member 3b after assembling the first member 3a and the second member 3b. |
