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CRICOS 00111D TOID 3059
MEE30003
Machine Design
Creative Journey
Revolio Clockberg
Henry Kissick 100622970
Matt Wildoer 100614757
Steven Krybolder 100584258
Lachie Wearden 100600329
Design Brief
• Using an A4 Acrylic sheet, laser
cutting, and SolidWorks, design a
compact yet efficient gearbox which
can pull 10kg up a ramp
• The weight must move 500mm along
the positive slope of the ramp
• The gearbox is to be powered by a 6V
9000RPM DC electric motor
Gear Box Designs
• Gears are very versatile, many types exist
such as bevel, helical, worm and spur
gears
• These gears can be arranged in many
ways, such as extensive gear chains, or
planetary gearing systems, or
combinations of such
• Many of these are not viable to
manufacture with the tools we have – a
thin sheet of acrylic and laser cutting
• Spur gears are reasonably easy to
Gear Type Pros Cons
Spur Gears Inexpensive and easy to
manufacture
Relatively simple
mathematical analysis
Can fail when under large
torque
Not suitable for high speed
operation
Helical Gears Can achieve high torque
Low amounts of noise
More complex to manufacture
and analyse
Requires extensive gear
chains for large reductions
Worm Gears Can handle large amount of
torque
Simple operation
Very low efficiency
Unsuitable for high speed
rotation
Planetary Gears Capable of very large
reductions
Extremely efficient, up to 97%
Can cause high stress on
shaft bearings
Can be very noisy with the
increase of operating speed
The Performance
Formula
𝑝 =
𝑚𝑔ℎ 2
𝑉𝐼𝑡2 𝐷3
• By analysing the terms within the formula, it is
clear certain characteristics of the gearbox
must be in balance for a maximum p – value
• The time value is a squared value and the
largest axial dimension is a cubed value; it is
important to focus on minimising these values
for this mathematical reason
• It is clear that a gearbox can not be perfect in
every aspect; a large gearbox can have more
torque but will potentially turn gears at a slower
rpm
SCAMPER
• Substitute
• Combine
• Adapt
• Modify
• Put to another use
• Eliminate
• Reverse
Winch
• Use the SCAMPER creativity guidelines to
analyse a simple hand crank system
• Modifications can be made, a winch is
made to pull massive amounts of weight,
we can increase the speed of a winch
system in sacrifice of torque, as we do not
need to pull thousands of kilograms
• Drawing inspiration from current inventions
Motor Efficiency
Compound Planetary Gear
System
Conclusion
• Use the creative process
• Draw inspiration from real world ideas and
change them to suit our needs; SCAMPER
• Need to take into consideration the tools
we have at hand, a laser cutter and a thin
sheet of acrylic
• Take into account the skills we have,
mathematically and with modelling
processes
• Be original

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Creative journey

  • 1. CRICOS 00111D TOID 3059 MEE30003 Machine Design Creative Journey Revolio Clockberg Henry Kissick 100622970 Matt Wildoer 100614757 Steven Krybolder 100584258 Lachie Wearden 100600329
  • 2. Design Brief • Using an A4 Acrylic sheet, laser cutting, and SolidWorks, design a compact yet efficient gearbox which can pull 10kg up a ramp • The weight must move 500mm along the positive slope of the ramp • The gearbox is to be powered by a 6V 9000RPM DC electric motor
  • 3. Gear Box Designs • Gears are very versatile, many types exist such as bevel, helical, worm and spur gears • These gears can be arranged in many ways, such as extensive gear chains, or planetary gearing systems, or combinations of such • Many of these are not viable to manufacture with the tools we have – a thin sheet of acrylic and laser cutting • Spur gears are reasonably easy to
  • 4. Gear Type Pros Cons Spur Gears Inexpensive and easy to manufacture Relatively simple mathematical analysis Can fail when under large torque Not suitable for high speed operation Helical Gears Can achieve high torque Low amounts of noise More complex to manufacture and analyse Requires extensive gear chains for large reductions Worm Gears Can handle large amount of torque Simple operation Very low efficiency Unsuitable for high speed rotation Planetary Gears Capable of very large reductions Extremely efficient, up to 97% Can cause high stress on shaft bearings Can be very noisy with the increase of operating speed
  • 6. 𝑝 = 𝑚𝑔ℎ 2 𝑉𝐼𝑡2 𝐷3 • By analysing the terms within the formula, it is clear certain characteristics of the gearbox must be in balance for a maximum p – value • The time value is a squared value and the largest axial dimension is a cubed value; it is important to focus on minimising these values for this mathematical reason • It is clear that a gearbox can not be perfect in every aspect; a large gearbox can have more torque but will potentially turn gears at a slower rpm
  • 7. SCAMPER • Substitute • Combine • Adapt • Modify • Put to another use • Eliminate • Reverse
  • 8. Winch • Use the SCAMPER creativity guidelines to analyse a simple hand crank system • Modifications can be made, a winch is made to pull massive amounts of weight, we can increase the speed of a winch system in sacrifice of torque, as we do not need to pull thousands of kilograms • Drawing inspiration from current inventions
  • 11. Conclusion • Use the creative process • Draw inspiration from real world ideas and change them to suit our needs; SCAMPER • Need to take into consideration the tools we have at hand, a laser cutter and a thin sheet of acrylic • Take into account the skills we have, mathematically and with modelling processes • Be original