There are many gear reducers with skewed teeth, and I would like to ask why skew is used.
3) does not produce a minimum number of teeth is less straight tooth undercutting (a ratio can do better than straight teeth, generally straight tooth bevel gear can only do 1:10, 1:15, but this is the theoretical value, actually did not do so, helical gear general >1:6 do 2 deceleration).
Advantages: 1) good meshing characteristics (smooth meshing, small noise ratio, straight teeth),2) the coincidence degree is big (because the bearing capacity is bigger than the straight tooth),
(L) two tooth profile from the point contact, the contact line from short to long, and shorter, until the point contact, and then out of engagement, not as a spur gear transmission that along the tooth width suddenly suddenly disengaged from the contact, but gradually into the mesh gradually from the impact of this engagement, small noise, smooth transmission.(2) coincidence degree is large, epsilon = epsilon, alpha + epsilon, betaThe helical gear is mainly able to improve the gear meshing degree of coincidence, so that the gear drive is stable, reduce noise.In order to improve the bending strength of tooth root and the contact strength of tooth surface, the appropriate modification coefficient can be chosen to solve the problem. Or increase the modulus of the gear.
