ca 011/ An epicyclic gear train shown in figure, the arm is keyed to the same shaft as the bad drum and the wheel A is keyed to the second shaft which carries a chain wheel, the chain being operated by hand. The two shafts have conmon axis but can rotate independently. The wheels B and Care compound and rotate together on a pin carried at the end of arm. The wheel D las internal teeth and is fixed to the outer casing of the block so it does not rotate. The wheek A and B have 16 and 36 teeth respectively with a module of 3 mm The wheels C and D have a module of 4 mm. Find (1) the number of teeth on wheck C and D when the speed of A is ten times the speed of am, and (2) the speed of wheel D when the wheel A is fixed and the ann rotates at 450 rpm anticlockwise. 10 10 Q12/ An epicyclic par train shown in Figure have the following data: Tc = 60, TD=20, TE = 45 and gear (DE) is a compound gear. If gear G is fixed and gear rotates at 120 rpm, assuming that all gears have the same module find the speed of arm 8 A Q13/ An epicyclic gear train with the following details: A has extemal teeth GV (fixed gear): B has 80 teeth internal: C - D is a compound wheel having 20 and 50 teeth (external) respectively, E-F is a compound wheel having 20 and 40 teeth (external) respectively, and G hus 90 teeth (exterteil). The arm nins at 100 ppm in cockwise direction. Determine the speeds for gears Cand G G. D Q14/ A compound spicyclic gear is shown in figure. The gears A, D and E are free to rotate on the axis P. The compound gear B and C rotate together on the axis e at the end of arm FAN the gears have equal pitch. The number of external teeth on the gears A, B and Care 18, 45 and 21 respectively. The gears D and E are anunukir years. The gear A rotates at 100 rpm in the anticlockwise direction and the gear D rotates at 450) rpm clockwise. Find the speed and direction of the art and the gear E. F D CHO - (9-10) Q15/ An over drive for a vehicle consists of an epicycle gear train, as shown in Figure with compound planets B-C. B has 15 teeth and meshes with an annulus A which has 60 teeth C has 20 teeth and meshes with the sunwheel D which is fixed. The amous A is keyed to the propeller shaft Y which rotates at 80 rpm. The spider which carries the pins upon which the planets revolve, is driven directly from main gear box by shaft X, this shaft being relatively free to rotate with respect to wheel D. Find the speed of arm (shaft X). when all the teeth have the same module B D D Arm EI D Arm 016/ An epicyclic gear train shown in figure wheel B and C an internal wheels with 80 and 82 teeth respectively. A compound wheel D-E gears with the two intemal wheek: D has 28 teeth and gears with while gears with B. The compound wheels revolve freely on a pin that projects from a disc keyed to arm. If the wheel C is fixed and the wheels have the same pitch and the arm makes 800 rpm, what is the speed of the wheel B. B E -D Q17/ Figure show an epicyclic gear train. Gear A has 15 teeth, gear B has 20 teeth, and gear C has 15 teeth. Gear B and C is a compound gear. If gear E is fixed and gear A rotates at 1000 rpm, find the speed of arm and gear D. C
