| 摘要 |
PROBLEM TO BE SOLVED: To improve power transmitting efficiency of gears by improving lubricating oil holding efficiency in tooth flanks to form a sufficient oil film between mutual tooth flanks. SOLUTION: This pair of gears is formed of a first and a second gears 11 and 12 to be engaged with each other. When computed mean roughness of surface roughness of tooth flanks of the gears 11 and 12 is Ra, the maximum height is Ry and skewness is Ry, the skewness Rsk of one of the first and the second gear is set at -1 or less and the maximum height Ry is set at 3 or less so that Ry/Ra becomes 6-12. Skewness of the other gear is set at 0-1.5 and the maximum height Ry is set at 3 or less so that Ry/Ra becomes 6 or less. Quantity of the lubricating oil staying between the tooth flanks is thereby increased to reduce a coefficient of friction between the tooth flanks, and baking resistance and abrasion resistance of the tooth flank are improved, and while power transmitting efficiency of the gears is improved. COPYRIGHT: (C)2005,JPO&NCIPI
|
