CREATIVITY JOURNAL

Nathan Prezioso, Hamna A’fifah, Lachlan Tactor, Raqayyah Ahmad Jamil

LE’ Top Gear

OUTLINE

• Problems• Ideas• Concept• Performance Formula• Gears• Motor• Calculations• Sketches• Final Design

PROBLEMS

• Lift 10kg of weight• Time constraint• Should not break• Made from acrylic sheet and glue- limited resources• Lift at least 500mm up the ramp

IDEAS: MIND MAP

WHAT WE WANT?

• High speed • Considering other aspects - superglue, weight, materials• Considering gear reduction and friction• Compact design- smaller gearbox• High performance• Large torque

PERFORMANCE FORMULA

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SPUR GEAR

• Pros• Simple• Constant • Transmit large amount of power

• Cons• Slow-speed gear• Stress high• noise

WORM GEAR

• Pros• Runs smoothly and quietly• Reduce speed and increase torque

• Cons• More power loss• Produce heat• Less efficient

HELICAL GEAR

• Pros• Runs smoothly and quietly• Practical for high load application

• Cons• More power loss• Less effiecient• Difficult to manufacture

MOTOR

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SOME CALCULATION

Number of teeth of pinion = 16Number of teeth of gear = 48Gear ratio = 3 : 1

Pinion rotates 3 times for 1 revolution of gear

SOME CALCULATION

SKETCHES 4-3-5 METHOD

SKETCHES 4-3-5 METHOD

SKETCHES 4-3-5 METHOD

FINAL DESIGN

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FINAL DESIGN

Front viewCasing of gearbox

REFERENCES

• https://www.nord.com/content/gear-ratio

• Fundamentals of machine design 5th edition, wiley