发明授权
US07786058B2 Rolling device employing lubricating grease composition and electric power steering apparatus employing the rolling device 有权
使用润滑脂组合物的滚动装置和使用滚动装置的电动助力转向装置

Rolling device employing lubricating grease composition and electric power steering apparatus employing the rolling device
摘要:
A rolling device employing a lubricating grease composition containing a thickener which is a mixture of (a) one or more diurea compounds made from one or more primary amines and a diisocyanate; (b) at least one fatty acid metal salt; (c) at least one amide compound selected from the group consisting of aliphatic amides and bisamides, where the proportions of (a), (b) and (c) satisfy the relationship: a/(b+c)=0.2−10 provided that (1) the proportion of ingredient (a) is 1-10, (2) the proportion of ingredient (b) is 0.5-2.5, and (3) the proportion of ingredient (c) is 0.5-2.5, and the amount of the thickener is 2 to 30% by weight, based on the lubricating grease composition; (d) a base oil which is a lube base oil having a pour point of −36 to −67.7° C. that includes a synthetic hydrocarbon oil as the main component; and (e) 1-7% by weight of an additive mixture containing an organomolybdenum complex, an organozinc compound of a dithiocarbamic acid, and an organozinc compound of dithiophosphoric acid.
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