| 摘要 |
<p>PURPOSE:To miniaturize a valve timing control device in axial direction so as to rotate a timing pulley around the same center as that of a cam shaft by varying a rotating phase without moving an operating member in axial direction. CONSTITUTION:A timing pulley 10 and an external gear rotor 15 are provided on a cam shaft 1, and a trochoid gear pair 18 comprises an external gear rotor 15 and an internal gear rotor 16. The internal gear rotor 16 is assembled to the storing recessed part 7 of a casing 8. The internal gear rotor 16 is connected to the timing pulley 10 through a gear pair 21 of an inner contact engaging system. A motor 40 is drivingly-connected to the external gear 38 of the casing 8. The internal gear rotor 16 revolves around the external gear rotor 15 by rotating the casing 8 by means of the motor 40 so as to change a rotational phase between the cam shaft 1 and the timing pulley 10. At this time, only turning effort is transmitted to the timing pulley 10 by the gear pair 21 in association with revolution of the internal gear rotor 16.</p> |
