LUBRICANT COMPOSITION, REDUCTION GEAR USING THE COMPOSITION, AND ELECTRIC POWER STEERING DEVICE USING THE REDUCTION GEAR

摘要

Disclosed are: a novel lubricant composition which, even when a stress is applied repeatedly for a long period, does not cause the increase in viscosity and therefore does not cause the separation of a lubricant base oil or the leakage of the separated base oil from a reduction gear or the like; a reduction gear using the lubricant composition; and an electric power steering device. The lubricant composition contains a combination of at least two thickening agents each containing lithium stearate and shows a viscosity of 355 or greater in a mixed state (at 25ºC). The reduction gear (50) has the lubricant composition containing microparticles charged therein. The electric power steering device has the reduction gear integrated therein.