Question

For the shown gear train, Zi=80, Z-40, ZA =25, Zs=15, Zs =2, Z6-40. Determine: State the type of motion of each gear Determine the transmission ratio 134 Determine the transmission ratio 146 Determine the angular velocity of gear"2" if the angular velocity of gear "6"06 = 100 rpm Note: inm = 0/0,= w/in

Answer 1

Here geanll) is an internal gear. Gearsl2) and (3) are in planetory configuration, where gear (2) is the sun gear and (3) is the planet gear which revolves around the sun gear (2). (4) is the arm. Gears (4) Aud s) are external gears. (5) and (6) constitute the worm wheel where (5) is the worm and (6) is the worm gear. en - 10-20 mesi = 20 x 100 = 2000 rpm usi = us = 2000 rpm LOOO uld' = x 2000 = -12001pm Speed at which arm rotetes, ula= up =-1200 pm Assuming gees (1) is fined, ie, ul, =0,

W2-(-1200) o-(-1200) = -2 uz +1200 = – 2400 2= - 3600 rpm Transmission _ -1200 = 0.333 ratio, i24 = we = -3600 W 3600 Trans mission ratio, i46 vare nr 1200 = -0.0833 12 od

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