| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve timing adjustment device facilitating assembling of an advance energizing means. SOLUTION: A shoe housing 12 has four shoes extending to radially inside disposed at almost same interval in the rotational direction. A vane rotor 17 has a boss part 17e and four vanes extending to radially outside from the boss part 17e disposed at a almost same interval in the rotational direction. The outer peripheral wall of the boss part 17e of the vane rotor 17 slides in contact with the inner wall of each shoe, and the boss part 17e supports each shoe relatively rotatable. A coil spring 27 is disposed at the front plate 14 side being an anti-cam shaft side to the vane rotor 17. A cylindrical protection tube 25 and a disc shape protective plate 26 prevents a metal coil spring 27 from being contact with an aluminum shoe housing 12 and the vane rotor 17.
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