| 摘要 |
PROBLEM TO BE SOLVED: To provide a bearing plate which can prevent looseness of a bolt for securing an actuator in a housing, and to provide the actuator for a variable valve mechanism of an internal combustion engine using the same.SOLUTION: A phase position of an end part 38a of a reinforcement rib 38 is separated (0-30°) more than the separation from a phase position of a bolt fastening part 32 to a phase position of a corner part 34a in a circumference direction of a claw part 34. Since then, around the bolt fastening part 32 of the bearing plate 14 to up to the corner part 34a of the claw part 34 in the circumference direction, the rigidity reduces and the elastic deformation increases. Accordingly, the balance of elastic deformation and plastic deformation is improved, and spring elements and coupling elements are joined in well balance at the bearing plate 14. This causes, even if a planetary and differential screw type of rotation-linear motion conversion mechanism is operated repeatedly in a variable valve mechanism, the permanent set of a ring-like plate 30 around a bolt fastening part 32 can be prevented. Thereby, the bolt fastening strength does not become reduced and looseness of the bolt can be prevented. |
