V2EX pitch circle

Pitch Circle

释义 Definition

节圆(齿轮):在齿轮几何中,用来定义齿形与传动比的一个“假想圆”。两齿轮正确啮合时,可把它们看作在各自的节圆处纯滚动接触;节圆直径称为节圆直径(pitch diameter)

发音 Pronunciation (IPA)

/pt skl/

例句 Examples

The pitch circle helps define the gear’s size.
节圆有助于确定齿轮的尺寸。

In gear design, the module and number of teeth determine the pitch circle diameter, which in turn affects center distance and speed ratio.
在齿轮设计中,模数和齿数决定节圆直径,而节圆直径又会影响中心距与传动比。

词源 Etymology

pitch 在机械语境里常指“齿距/节距(齿与齿之间的间距概念)”,circle 是“圆”。合起来的 pitch circle 指与“节(pitch)”相关的那条关键圆周,用于建立齿轮啮合的基本几何关系。该术语主要源自工程制图与齿轮理论的标准化表达。

相关词 Related Words

文学与著作 Literary Works

  • Machinery’s Handbook(《机械工程手册》):齿轮章节中用节圆/节圆直径作为核心尺寸定义。
  • Shigley’s Mechanical Engineering Design(《希格利机械工程设计》):齿轮设计与强度计算部分频繁使用 pitch circle/pitch diameter。
  • Dudley’s Handbook of Practical Gear Design and Manufacture:系统讨论节圆、基圆与渐开线齿形的关系。
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