Question

Solve for part C only, dimensions are attached too..
A two stage reduction drive is to be designed to transmit 2 kW; the input speed being 960 r.p.m. and overall reduction ratio being 9. The drive consists of straight tooth spur gears only, the shafts being spaced 200 mm apart, the input and output shafts being co-axial. (a) Draw a layout of a suitable system to meet the above specifications, indicating the speeds of all rotating components. (b) Calculate the module, pitch diameter, number of teeth, blank diameter and face width of the gears for medium heavy duty conditions, the gears being of medium grades of accuracy. (C) Draw to scale one of the gears and specify on the drawing the calculated dimensions and other data complete in every respect for manufacturing purposes.

Answer 1

To represent the diameter of gear i have drawn 2D diagram and for denoting face width i have drawn 3D diagram of only 2 gear teeth separately for clear understanding along with given dimensions as shown below :

DATE: PAGE: Solution riven » . 108 mm pitch diameter : d. = los nm da = 324 mm dz 324 sm. blank diameter: du (14.6em; doza 330.6 mm das 114.6 mm; dou 330.6 mm fere width: NO. teeth : 22 id ; 22= 54; 23= 18 24 54. Speed : n = 960 pm 320 XPM102 = 320 PM 106.67 om module m = 6 of Part (c) » we can also find apart from above dimension ciruular pitch follows Pc = id.84 mm. I di AZI TX lod 950 18 circular pitch. face width= 60 mm Jaddendum viddendum

DATE : PAGE : Seale diagram let lamm 1 cm cm. di 108 mm 114.6 mm - 6.75 7.1625 cm 6.75cm. pitch diameter di = 108 mm outer diameter of blant dia dor 114.6 mm 7.1625 an - base Nometer PE HA Gear Spolfication ni module 6 mm No. of teeth 18 pitch dia = 108 AM blank dia a 146 mm face width Gomm.