1 / 24

COMPLEX MECHANICAL FUNCTION

COMPLEX MECHANICAL FUNCTION. The role played by a set of components in transferring motion inside a technical object . Complex Mechanical Functions. Motion Transmission Motion Transformation. DEFINITIONS: System: is a set of components that share the same function.

verdad
Download Presentation

COMPLEX MECHANICAL FUNCTION

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. COMPLEX MECHANICAL FUNCTION The role played by a set of components in transferringmotion inside a technical object.

  2. Complex Mechanical Functions Motion Transmission Motion Transformation

  3. DEFINITIONS: System: is a set of components that share the same function. Motion transmission:relays motion from one component to another without modifying the motion. Motion transformation: transforms the type of motion as it is relayed from one component to another.

  4. All systems contain • A driver • (At least) 1 Driven Component • (Possibly) 1 or more Intermediates Refer to page 390 in textbook

  5. Components • DRIVER:Receives the power required to set the system in motion. • DRIVEN:Receives the motion of the driver and transmits it to another part. • INTERMEDIATE: Located between the driver and the driven. May or may not be present in a system.

  6. Driver Component Driven Component Intermediate Component

  7. Motion Transmission The driver and the driven perform the same motion 5 types: • Friction gear system • Simple gear system • Pulley & belt system • Chain & sprocket system • Worm & worm gear system

  8. Friction Gear System Transmits rotational motion between two or more nearby parts. COMPONENTS & OPERATION: Has two or more wheels without teeth that roll together.

  9. Simple Gear System http://www.technologystudent.com/gears1/gears1.htm Transmits rotational motion between two or more nearby parts. COMPONENTS & OPERATION: Has two or more gearsthat come in contact and mesh together.

  10. Belt and Pulley Transmits rotational motion between parts that are relatively far apart from each other. COMPONENTS & OPERATION: A belt slide is on two or more wheels (pulleys). The pulleys must have a smooth surface for the belt not to break. http://www.technologystudent.com/gears1/pulley1.htm

  11. Chain & Sprocket Transmits rotational motion between parts that are relatively far apart from each other. COMPONENTS & OPERATION: Has two (or more) sprockets (gear wheels) that do not touch, plus a chain. http://www.technologystudent.com/gears1/chain1.htm

  12. Worm & Worm Gear http://www.technologystudent.com/gears1/worm1.htm Transmits rotational motion to non-parallel parts that are close to one another. The worm is the driver. The opposite will not work. Worm COMPONENTS & OPERATION: Has a worm and a worm gear; the teeth of each component slide into each other. Worm gear

  13. Motion Transformation

  14. Motion Transformation: The driver and driven component do NOT have the same motion • We’ll be looking at 4 system types: • Slider-crank • Rack & pinion • Cam followers • Screw gear p.397-398

  15. Slider-Crank • FUNCTION: • Rotational  Translation • (or vice versa) • COMPONENTS: • Has a connecting rod and a crank. • The rod is the INTERMEDIATE. piston Connecting rod Crank http://www.youtube.com/watch?v=T831-i3ShX8

  16. Rack & Pinion • FUNCTION: • Rotational  Translation • (or vice versa) • COMPONENTS & OPERATION: • Has a rack (rod with teeth) and a pinion (gear wheel). The teeth of the components mesh.

  17. CAM & Follower • FUNCTION: • Rotational motion Translation motion. • COMPONENTS & OPERATION: • Has a cam (irregular shaped disc) and a follower (the rod).

  18. Screw Gear • FUNCTION: • Rotational motion Translation motion.(or vice versa) • COMPONENTS & OPERATION: • At least one screw and one nut.

  19. Speed changes- Friction gears & Belt and pulley Slower Slower Faster medium Faster medium Smaller diameter = faster speed Larger diameter = slower speed

  20. Speed changes- Gears and Chain and sprocket Faster Slower Slower medium medium Faster Fewer Teeth = faster speed More Teeth = slower speed

  21. Speed changes- Worm and worm wear Allows for a large reduction in speed. 1 full revolution of worm = movement by 1 tooth in gear

  22. Speed Changes

  23. http://www2.cslaval.qc.ca/cdp/UserFiles/File/previews/mechanisms/http://www2.cslaval.qc.ca/cdp/UserFiles/File/previews/mechanisms/ http://www.youtube.com/watch?v=QPaUJfA1KsY

More Related