Creative Journey ………………………………………………………… MEE30003 Machine Design 2017 DAMAN SINHMAR (100012076), FABIAN WOOD (100497893), SUVENAN PRADEEP PERERA (4933397) & EMMA WALLACE (7635044)
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Creative Journey…………………………………………………………MEE30003 Machine Design 2017
DA M A N S I N HM AR (100012076) , FA BI AN WOOD (100497893) , SUVEN A N PR A DEEP PER ER A (4933397) & EM M A WA LLACE (7635044)
Aims
Minimal size
Smallest D possible
Time factor… not too worried about it
We plan to worry about optimisation later
The Standard type of Gear Box
Example in class
Really long- large D
Want to decrease D- make it more of a cube
Initial Idea: Planetary GearsWhy?
Very flat profile-
Space saving
The problem with Planetary Gears
Precision- Planetary gears are required to be highly accurate… laser cutting is not…
The ring gear is very thin, so it may not be strong enough in acrylic
Possible Layouts
Another Idea…Considering a PulleySpool Size - Affect to Torque Demand
Guiding the String would avoid possible interference of string with Bearings. Depending on String Diameter
New IdeaSomething Simpler
Some Considerations (& Calculations)Accommodating grease pocket for lubrication
To Further Develop this ideaConsider the factor of safety… does it need to be 2 or can it be smaller and reduce the size of the gears (d)
Consideration into the diameter of the shaft- 6mm is the smallest
Create the smallest gear possible with a 6mm shaft- the smallest gear will have to be slightly larger than 6mm
Locking mechanism of DC motor◦ Use the reverse direction of Motor rotation to ensure effective locking.
Pathfinding
Gear layout optimising software
Not found but could be handy…
Bibliographyhttp://www.stefanv.com/quiet/2000-03/figure1.gif
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