Ijk gearbox hectos
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Transcript of Ijk gearbox hectos
![Page 1: Ijk gearbox hectos](https://reader031.fdocuments.net/reader031/viewer/2022020203/588983451a28ab461b8b6245/html5/thumbnails/1.jpg)
Gearbox projectThe creative journey
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Design Criteria & ConstraintsMaterial
1 A4 sheet of acrylic 3mm thickness
Glue
string/cord
Minimum performanceLift at least 8kg
Lift up to at least 0.5m
Powered by a DC electric motor
Mounted on a plate that will be secured by studs and nuts providedNo washers can be used
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IdeasPlanetary gear systems
Grinder gears
Extreme reduction gear sets
Cycloidal gear system Extreme gear reduction11 million to one
http://3dprint.com/wp-content/uploads/2015/07/Untitled20.png
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Why use spur gear in this project?Simpler design, allows for more effort to be put into refinement.
Compact and simple to construct
Spur gear have a high power transmission efficiency
Less chance and easier to spot for fault
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ModelWe used meccano gears with a similar sized motor to see how it performs
Reduction was about 125 to 1
Lifts 4 kg, then the string broke
Flawed design
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Gearbox initial design concept Utilize spur gear
Housing for the gear hold together by box joint
Two shaft for gear
Hole for mounting
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Relevance and effectivenessImplements conventional knowledge, allowing for more effective use of work time.
From previous knowledge it does the job.
Fits within given parameters for project.
Works.
Safe; will work in conjunction with housing for safety.
Materials and design will provide enough operating hours for the task required.
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ProblemisationLess materials used, simpler design (less room for mistake or error).
The solution shows how existing solutions could be improved.
Predictable behaviour..
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Preliminary calculationsTime for ascent: sqrt[(2hm)/dF]=t, from s=ut+1/2at^2
Where h=height for weight to ascend, m=mass of weight, dF=[T(out/r(finalShaft)]-mg.
Power Output: P=VI=ωΤ
Where P (watts)=output power, V (v)=input voltage, I=input amperage, ω=motor shaft speed, Τ=motor shaft torque
ω1/ω2=d1/d2
Where ω=angular velocity, d=pitch diameter
Ta/Tb=Na/Nb
Where T=torque, N=number of teeth
Aiming for ~1:4400 ratio for motor to lift 8kg with maximum efficiency (+10% output torque)
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Fin.
Oliver Morton
Stefan Radulovic
Son Trinh