| 单词 | pitch circle |
| 释义 | > as lemmaspitch circle pitch circle n. Mechanics a circular pitch line. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > parts of wheels > tooth > imaginary line through pitch line1787 pitch circle1813 proportional circle1825 1813 A. Rees Cycl. (1819) XXIII. at Mill-work A circle..is described round the face of the rough cogs upon its pitch diameter, that is, the geometrical diameter, or acting line of the cogs; so that when the two wheels are at work together, the pitch circles..of the two are in contact. 1884 F. J. Britten Watch & Clockmakers' Handbk. (new ed.) 198 The pitch circles of a wheel and pinion working together should touch but not intersect each other. 2002 Design News (Nexis) 5 Aug. 48 Backlash is the amount by which the width of a gear's tooth space exceeds the thickness of an engaging tooth measured at the pitch circle of the gears. < as lemmas |
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