| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve durability and adjustment responsiveness of valve timing. <P>SOLUTION: A device 1 includes: an inner rotor 20 which partitions a plurality of operation chambers 32 and 33 in a rotational circumferential direction inside an outer rotor 10 and slidingly rotates to the outer rotor 10 by entry and exit of hydraulic oil with respect to the respective operation chambers 32 and 33; and a spiral spring 50 which biases the inner rotor 20 in a biasing direction with respect to the outer rotor 10 in such a way that outermost circumference and inner most circumference windings 522 and 520 of wire 52 are engaged to the rotors 10 and 20, respectively, one of rotational circumferential directions and the other are defined as a deformation direction and the biasing direction, respectively, and the spiral spring twistingly deforms in accordance with sliding rotation of the inner rotor 20 in the deformation direction with respect to the outer rotor 10. The spiral spring 50 has a bent part 524 bent to protrude in a radial direction between the parts engaged by the respective rotors 10 and 20, and the bent part 524 is brought into linear contact with part of the wire adjacent in the radial direction. <P>COPYRIGHT: (C)2013,JPO&INPIT |
