Patent ID: 7669567

Claim:
A valve timing adjusting device of an internal combustion engine for adjusting valve timing of at least one of an intake valve and an exhaust valve, which are opened and closed by a camshaft through torque transmission from a crankshaft, the valve timing adjusting device comprising: a first rotator that has a first gear section and that rotates with the camshaft in an interlocked manner; a second rotator that has a second gear section and that rotates with the crankshaft in an interlocked manner; a planetary rotator that has a third gear section and a fourth gear section and changes a relative phase between the first rotator and the second rotator through sun-and-planet motion performed integrally by the third gear section and the fourth gear section while the third gear section and the fourth gear section are geared with the first gear section and the second gear section respectively; and a planetary carrier that has a support section for supporting the planetary rotator such that the sun-and-planet motion can be performed, wherein the support section is located on an inner peripheral side of a first center, which is a tooth contact center between the first gear section and the third gear section, and is separate from an inner peripheral side of a second center, which is a tooth contact center between the second gear section and the fourth gear section, and the valve timing adjusting device is structured such that first moment generated in the planetary rotator by a radial load applied to the third gear section by the first gear section is larger than second moment generated in the planetary rotator by a radial load applied to the fourth gear section by the second gear section.