Question

ine... Х Question A company requires you to design a reverted gear train (see figure below) with a speed ratio of 12:1 and the minimum number of gear teeth must be at least 24 teeth. In addition, it requests the gear train to strictly follow a standard series of modules. Modules of Gear A and B need to be 3.125 mm, and for gear C and gear D are 2.5 mm. Determine the suitable number of teeth on each gear in order to obtain a real speed ratio. Number of gear teeth need to be integer in order to produce the gear train Briefly explain the reason to adjust the speed ratio into a real value. ii) с 200 mm Driver Driven EV Introduction of gear train. Simple list of gear with related size in market (complete with figure). Calculation - show how to get the right number of gear teeth. Discussion - explain about why you need to adjust the provided speed ratio (+0.3 in tolerance) in order to get number of teeth of gear in integer value. Conclusion.

Needs clear and Brief explanation with calculations

Answer 1

adution : Given the data (1) mg = ma: 3.125 mm 2.5 mm mp- Teeth on (B) - TB Teeth On (A) = TA Teeth on (c) = TC Teeth on (o) = To I tau Speed rati'o = 12:1 S.R-12- TB X TO 0 TBXTC MATA mBTB + MCTC тър + anto al distance 2 MA (TATTB) ma (Tc+To) 200 2 3,125 200 G+TB) 2:5 (tc+To) 2 400 = 3.625 CTA+TB) = 2.5 (Tc+to) TA+TB 400 3.125 TA+TB = = 128 a

TC+тра 400. 4,5 Тc+Tp = 160 - 3 assume Тв А Тр З Тв: 3То Тря чте using in @ ТА+ ТВ = 18 + 3ТА 128 ТА = 32 Тg = 96 Now, using ③ in ① Тc+Tь = 160 Te+uTC = 160 5Tc= 160 TC = 32 No. of teeth on c' TD = 128 No.of teeth on o'

11 the is Reay en to adjust the speed folio Polo mod Value that in real the gear are to Produced by some Blandard pitch circle diamdor not is in fraction then, it will 80 9f gear balio machine to Prooduce as Possible for gear hobbing per fraction value these fare, gear ratio must be a specific whole no. geon tatio - 2,1 Cnot valid) gear ratio = a (valid).

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