Why do gearboxes use helical gears?
The length of the broad contact line of the helical gear tooth is gradually increased from zero, and gradually shortened until the disengagement, and the load is not suddenly added or unloaded, so the gear transmission of the helical gear gear is more stable.
It is prone to noise and shock and is therefore not suitable for transmission in high speed and heavy loads. When a pair of parallel shaft helical gear teeth engage, the tooth width of the gear is gradually entering the mesh and gradually disengaged from the engagement,
When the spur gears engage, the contact lines of the tooth surfaces are parallel to the axis of the gears. As a result, the gear teeth are joined at the same time along the width of the tooth and simultaneously out of engagement, and the load is suddenly added and unloaded along the width of the tooth, so the stability of the spur gear drive is poor,
