1. Due to manufacturing errors, the instantaneous speed of spur gear transmission varies. This is mainly due to the uneven speed changes caused by manufacturing errors at the moment the gear teeth engage and disengage, resulting in a polygonal effect.
2. The teeth of the helical gear are constantly meshing in and out, with no blind spots in the meshing, thus ensuring the uniformity of speed. As a result, the operation appears to be very smooth.
3. The operating effect of spur bevel gears and helical gears is the same as described above, the difference is:
4. Spur gears are transmissions with two parallel shafts.
A 5-bevel gear is a transmission with two intersecting shafts.
6. When the pitch circle diameter is not changed, the torque on the shaft will not change.
7. The change is in the force analysis of the gears:
The tooth normal of the 8-tooth bevel gear coincides with the tangential direction of motion.
9. The tooth normal of a spiral bevel gear always maintains an angle β with the motion tangent. 10. The torque borne by the gear tooth is the product of cosβ and the torque itself.
In other words, the bending strength of spiral bevel gear teeth is greater than that of spur bevel gear teeth, but the transmitted torque remains unchanged.
