| abstract |
PROBLEM TO BE SOLVED: To reduce the noise of a reduction gear more than before without depending on the magnitude of backlash when a small gear and a large gear are combined, and without complicating the structure of the reduction gear. Provided are a lubricant composition, a reduction gear with low noise by using the same, and an electric power steering device using the same. A lubricant composition is a polyurethane synthesized by reacting a long-chain polyol having a number average molecular weight of 500 or more, a crosslinking agent having 3 or more active hydrogen groups in one molecule, and a polyisocyanate with the lubricant. Resin particles were added as buffer particles. The speed reducer 50 was filled with the lubricant particles. The electric power steering device decelerates the rotation of the steering assist electric motor M via the reduction gear 50. [Selection] Figure 2 |