| 摘要 |
<p>An intermediate lock mechanism is formed by first and second lock pins 10, 11, an advancement restricting groove 12; and a retardation restricting groove 13. The first and second lock pins 10, 11 are arranged in a vane rotor 2 and projectable and retractable independently from each other. The advancement restricting groove 12 is formed in a cover 6 and becomes engaged with the first lock pin 10 when the first lock pin 10 is projected, thereby locking, at an intermediate lock phase, rotation of the vane rotor 2 to the advancing side. The retardation restricting groove 13 is formed in a cam sprocket 5 and becomes engaged with the second lock pin 11 when the second lock pin 11 is projected, thereby locking, at the intermediate lock phase, rotation of the vane rotor 2 to the retarding side. In this manner, reliable locking is ensured, and chattering of the vane rotor is easily prevented when locking is performed.</p> |
