center pinion

基本解釋

Some cars have variable-ratio steering, which uses a rack-and-pinion gear set that has a different tooth pitch (number of teeth per inch) in the center than it has on the outside.
有些車(chē)的轉(zhuǎn)曏系角傳動(dòng)比是可變的，這種轉(zhuǎn)曏器採(cǎi)用齒輪齒條式，它在中間而不是外部，有不同的齒密度（每寸齒數(shù)）。
The hypoid gear is in common use today due mainly to the fact that the offset pinion allows the propeller shaft to be set below, (for cars) or above, (for commercial vehicles) the crown wheel center.
現(xiàn)在的主減速器普遍使用準(zhǔn)雙曲麪圓錐齒輪，這主要是因爲(wèi) 主動(dòng)錐齒輪的偏移允許轎車(chē)上傳動(dòng)軸佈置得比從動(dòng)錐齒輪低一些，而商用車(chē)上又允許佈置得比從動(dòng)錐齒輪高一些。