Why does the transmission gear and reverse gear use straight gears, while other gears use bevel gears? In addition, why do heavy duty trucks use straight gears for some transmissions?
Not necessarily, usually 1.3.5 with oblique teeth, 2.4.6 with straight teeth, I do not know why, but the maintenance process found basically the case.
In addition, heavy truck may be too large torque, the use of helical teeth, the axial force is too large, so that the axial positioning of the gear is difficult to implement, so the use of straight teeth.
Low frequency, low requirement of stability and reliability, and also meet the requirement of processing technology. Oblique teeth are the opposite.
