Technology
• White Table Tops• Work Book• Text Book• Pen or Pencil• Start when Quiet
Technology
• Motion Transmission• Motion Transformation• Wind Turbine
Motion Transmission Systems
• Characteristics• Construction• Speed Changes • Torque
Workbook p. 225Textbook p. 435
Motion Transmission:
• Is the mechanical function of relaying a motion from one part to another without altering the nature of the motion
A Motion Transmission System:
• Is a set of components that perform the function of transmitting motion
Types of Components
Driver Component
• Component that receives the force required to activate the system
Driven Component
• Component that receives the motion and transfers it to another part
Intermediate Component
• Component located between the driver and driven components. Not all systems contain an intermediate component
Gear Trains
Direction
• Alternates from one gear to another
Reversibility
• Yes
Chain and Sprocket
Direction
• Identical only for the sprockets touching the same side of the chain
Reversibility
• Yes
Worm Gear
Direction
• Depends on the direction of the threads on the worm screw shaft
Reversibility
• No
Friction
Direction
• Alternates from one gear to another
Reversibility
• Yes
Belt and Pulley
Direction
• Identical only for pulleys touching the same side of the belt
Reversibility
• Yes
Motion Transformation
p. 231
Motion Transformation
• Is the mechanical function of relaying a motion from one part to another while altering the nature of the motion
Rack and Pinion
Possible Transformation• Rotation => Translation• Translation => Rotation
Reversibility• yes
Screw Gear Type 1
Possible Transformation• Rotation => Translation
Reversibility• No
Screw Gear Type 2
Possible Transformation• Rotation => Translation
Reversibility• No
Cam and Follower
Possible Transformation• Rotation => Translation
Reversibility• No
Slider-Crank
Possible Transformation• Rotation => Translation• Translation => Rotation
Reversibility • Yes
Homework
pp. 225-238
Activity # 1
• Get a partner
• Paper and Pencil / pen
• Rotate clockwise around the classroom