Determination of Gear Sizes and Force Analysis
· Select a module for the meshing gears 2 and 3.
· Choose smallest or more than smallest number of teeth, that will ensure no interference.
· With pulley diameters and train value given, calculate speed ratio, ,
Train Value =
· Calculate ,
· Calculate
· Calculate
·
·
· Calculate
·
Calculate .
· Calculate
· Calculate tangential force at gears 2 and 3 mesh,
.
· Calculate radial force at the gear mesh 2 and 3,
· The vertical force at the pulley location 4 is .
· With all the forces known, calculate reactions RPY, RSY, RPZ and RSZ
· Draw shear force and bending moment diagrams in Y and Z directions and finally draw resultant bending moment diagram and the torque diagram on graph paper below a scaled line diagram of the shaft