What is the minimum number of teeth of a cylindrical gear?Minimum number of teeth from our general manual is found in 17 teeth, but like the car steering gear mechanism only 7 teeth, do manual said is wrong? Then the minimum number of teeth can also have small? Who know please explain.
If it is not a standard gear, but a change gear, not external meshing, addendum coefficient is not 1, and the tooth angle is not 20 degrees, the minimum number of teeth is not necessarily 17For example: when ha*=0.8, x=0.15, alpha =20 beta =35 degrees degrees, Zmin = 6
Usually the minimum number of teeth is 17, which is the most common standard straight cylindrical gear, the outer meshing, the top tooth coefficient of 1, and the tooth shape angle of 20 degrees
The minimum tooth number is related to the addendum height factor ha*, the modification factor X, the tooth shape angle, and the helix angle beta:Zmin=2 (ha*-x) cos /sin - alpha beta fand
