Lecture--newWeek09

# Lecture--newWeek09 - McMaster University Engineering Design...

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McMaster University Engineering 1C03 Dr. T. E. Doyle, P.Eng Dept. of Electrical and Computer Engineering

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Overview ± Recall gear design triangle and terminology. ± Recall gear design example from last day: ± Extend that example into Inventor’s Design Accelerator ± Further extend into MapleSim ± Worm-Worm and Worm-Rack Gear
Clicker Question ± A spur gear’s diametral pitch or module is a standard that ensures: A. A gear pair thickness is within specification. B. The torque value maximum is not exceeded. C. The pitch circle diameters are modular factors of each other. D. A gear pair will appropriately mesh with each other. E. The proper conversion between standard US units and metric units.

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Recall: Simplified Ideal Gear Ratio Example 1 Consider the gear ratio ( i ) of the above simplified ideal gear pair where gear-1 (diameter = 10 mm) is the input driven gear at 1 revolution per minute (rpm) in the clockwise direction (+ve).
Recall: Simplified Ideal Gear Ratio Example 1 The gear ratio ( i ) of the pair can be calculated using the ratio of diameters ( d2÷d1 ). Thus i = d2 ÷ d1 = 20÷10 = 2, and w 2 = -0.5 rpm. To create the ideal gear geometries we will use Autodesk Inventor Professional

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Lecture--newWeek09 - McMaster University Engineering Design...

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