An overhead Gear box as shown in figure is taking drive through an Electric Motor of 40 KW which is running at a speed of 1750 rpm. Gear 1 and gear 2 has gear ratio of 4.5 and module of 3.5 mm. Gear 3 and gear 4 has gear ratio of 5 module of 3 mm. Gear 5 and gear 6 has gear ratio of 4 and module of 4 mm.Take a normal pressure angle14.5 and helix angle 25.

Given:

Z1=19 , Z=23, Z=21

The shaft _y= 390 MPa. The Gear _o= 196 MPa

Determine the following:-

1. Pitch circle Diameter of each gear
2. Forces on each gear
3. Torque on each gear
4. Forces on each shaft
5. Forces on each bearing
6. Make sketches that shows free body diagrams, forces, stresses,
7. Manual design calculation of each machine element using necessary equations and selection of standard parts.
8. consider reasonable assumptions besides the given specification wherever necessary.

2 Bearing 3 6 Output shaft Motor 5 4 Input Shaft Figure 1 Gear Train 2 Bearing 3 6 Output shaft Motor 5 4 Input Shaft Figure 1 Gear Train