Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 1Autumn Quarter Gears Lab 6

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 2Autumn Quarter Before we begin… Pre-assembled Lego materials SHOULD NOT be taken apart. –Lego Gripper, Steering Assembly, Differential Assembly Disassembling any of the pre-assembled examples will result in a 10-point deduction on your lab report grade. Follow directions! Only take objects apart when told to and when you have put them together to begin with.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 3Autumn Quarter Gear: Definition A gear is a wheel with teeth along its rim. It is used to transmit effort from one shaft to another.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 4Autumn Quarter Gear Train Combination of two or more meshed gears. Used to change the rate of rotation, the direction of rotation, and the amount of torque.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 5Autumn Quarter Gear Ratio Gear ratio is also called “Mechanical Advantage”

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 6Autumn Quarter Types of Gears Spur gears Worm gear Rack and pinion Bevel gears

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 7Autumn Quarter Spur Gears Simplest Most widely used in Instrumentation and Control Systems Used to drive parallel shafts

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 8Autumn Quarter Spur Gear Terminology Pitch circle diameters Size of teeth (Diametral pitch) Center distance Number of teeth Pinion Gear

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 9Autumn Quarter Worm Gears Used to change speed and direction of rotation. Used for connecting skew shafts (usually 90 degrees) High gear ratios. Higher load capacity.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 10Autumn Quarter Rack and Pinion Used to convert rotational motion into linear motion, or vice-versa.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 11Autumn Quarter Bevel Gears Used for intersecting shafts. Most transmissions occur at right angles but shaft angles can be any value.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 12Autumn Quarter Sprockets Gears are connected by a chain instead of directly. The input and output shaft rotations are in the same direction.

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 13Autumn Quarter Today’s Lab: Window Lift Motor Lego Robot Gripper Gears at Table Build Gearbox Bicycle Gears

Engineering H191 - Drafting / CAD Gateway Engineering Education Coalition Lab 6P. 14Autumn Quarter Questions ?