Problem 1 Same direction of 2 (input) and 3 (output) Reduction of 4:1 Same pitch and pressure angle in all gears TEETH: N2=20 N7=120 N4=? N5=? N6=? Propose the number of teeth missing
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Step 1: The reduction ratio is 4:1, which means that the output gear (gear 3) rotates 4 times slower than the input gear (gear 2). Show more…
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A compound reverted gear train is to be designed as a speed increaser to provide a total increase of speed of exactly 56 to 1. With a 20° pressure angle, specify appropriate numbers of teeth to minimize the gearbox size while avoiding the interference problem in the teeth. Assume all gears will have the same diametral pitch. The 1st stage has the largest speed ratio. The number of teeth in gear 2 is The number of teeth in gear 3 is The number of teeth in gear 4 is The number of teeth in gear 5 is
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The figure below is a spur gear train drive and gear 2 is the inlet of the gear train. It transfers 12 kW of power at 1200 rpm. Gear 3 and 4 have 60 and 20 teeth respectively and are made with 20° pressure and full-depth teeth. The desired speed for the output shaft is 32 rpm. Find the minimum number of teeth on gear 2 to obtain 32 rpm at the output and confirm its validation for interference-free power transfer. Find the speed ratio at each gear set using the results obtained at "a" (above). Determine the rotational speed of each gear (n2, n3, n4, and ns) using the results obtained at "a1" (above). Find the torque of each shaft (Tin, Tc, and Tou) assuming that there is no frictional loss during the power transfer. Determine the radial, tangential, and total forces transmitted at the last gear set assuming a module of 4 mm and draw the free body diagram of gear 4 showing the forces and torques.
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