The imaginary reference line along a rack's teeth where pitch is measured, crucial for proper gear engagement and motion transfer.
The pitch line is a theoretical line along the length of a rack's teeth where the tooth thickness equals the space width, defining the reference for pitch measurement. It represents the ideal contact path for mating with a pinion gear, ensuring smooth linear motion conversion from rotational input. In rack-and-pinion systems, this line determines the effective radius for calculating linear displacement per pinion revolution.
诱因 → 失效模式 → 工程缓解
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Pitch line accuracy ensures proper gear meshing, minimizes backlash, reduces vibration/noise, and maintains positioning precision in linear motion applications.
Pitch = π × Module. The module defines tooth size, while the pitch line provides the reference for spacing these teeth consistently along the rack.
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