planetary reducer
The main disadvantage of straight gears is that they can produce vibration. Whether due to design, manufacturing or deformation, some changes in the shape of the gradient ute along the whole tooth surface at the same time. This will lead to a regular, per-tooth incentive, which is often very intense. The resulting vibration causes both a large load and a noise on the gear. Another disadvantage is that the additional strength sometimes obtained by the engagement of the two teeth during contact time can not be exploited because the stress is limited by the engagement of the single teeth in the cycle.
Inclevel gear can be regarded as a group of thin pieces of appropriate tooth gear placement into cylindrical gear, so that each contact is in different parts of the tooth profile, resulting in the compensation of each thin gear error, this compensation is very effective due to the elasticity of the teeth, so that the error within 10mm can make the error average, so in the case of load, can run as smoothly as the error within 1mm. Because at any moment, about half the time (assuming a coincidence degree of about 1.5) will have two teeth engaged, this brings additional benefits in terms of strength. Therefore, the stress can be based on 1.5 times the tooth width, rather than a tooth width.
It is difficult and uneconomical to manufacture and assemble a large pile of thin straight gears, so they are connected with wheels along the spiral line. Cevel gear, unlike straight gear, it can cause adverse axial force. But the benefits of vibration and strength are far better than the disadvantages of axial thrust and slightly increased manufacturing costs. Therefore, inclined gear is used rather than straight gear in the manufacturing of reducer machine. For example, four series: R series coaxial inclined gear reducer, K series spiral bevel gear reducer, S series oblique gear worm gear worm reducer, F series parallel shaft bevel gear reducer.
