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Unformatted text preview: MECH 325 Gear Forces and Kinematics MECH 325 2 Objectives By the end of todays class, you should be able to: Analyze gear train kinematics, determining output rotation magnitude and direction Analyze gear train power, torque transmission, and reaction forces/moments Describe how materials/methods for forming gear teeth influence gear selection and performance MECH 325 3 Gear Kinematics - Magnitude Need to determine magnitude of input and output velocity Train value, e For simple and compound gear trains For planetary gear trains need to work in arm reference frame MECH 325 4 Gear Kinematics - Direction To determine direction, better to visualize the problem than memorize relationships Remember: mating teeth move same direction MECH 325 5 Two Ways to View Direction MECH 325 6 Gear Animation http://www.gearideas.com/tech/warm.htm MECH 325 7 Gear Kinematics - Direction Determine speed, n L , and direction of the output gear if the input gear has a velocity of...
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- Fall '10