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 R_PY, R_SY, R_PZ and R_SZ

·        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