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Planet gearing acording to DIN 3960

 

Geometry of the sun gear is calculated. For calculation the following initial data must be provided:

From the initial data several results can be derived. Formula flow describes calculaton of intermediate results as well as calculation of the final results. Transverse module
equation110

Transverse presure angle
equation114

Pinion facewidth
equation118

Reference centre distance
equation120

Working transverse pressure angle
equation124

Sum of addendum modification coefficients tex2html_wrap_inline695
equation129

where
equation133

Sum of addendum modification coefficients tex2html_wrap_inline697
equation135

Addendum modification coefficients
eqnarray139

Reference diameter of the sun and planet
eqnarray141

Root diameter of the sun and planet
eqnarray143

Tooth depth
equation149

Tip diameter of the sun and planet
eqnarray153

Base diameter of the sun and planet
eqnarray159

Transverse contact ratio
equation163

Length of path of contact
equation167

Transverse pitch on path of contact
equation176

Overlap ratio
equation181

Total contact ratio
equation185

Diameter of V-circle of the sun and planet
eqnarray187

Transverse pressure angle on V-circle on the sun an planet
eqnarray191

Base helix angle
equation199

Number of teeth of the sun and planet in a span
eqnarray201

Base tangent length ot he sun and planet for tex2html_wrap_inline699 teeth
eqnarray219


Leon Kos
Tue Dec 2 10:35:04 CET 1997