Transmission error refers to the deviation between the actual output angle and the ideal angle of a helical gear along the direction of the meshing cooperation line. It is the main indicator of the vibration instability of helical gears and has a significant impact on the dynamic performance of helical gear meshing transmission. The calculation formula is:
In the formula, Et represents the transmission error; EA refers to the comprehensive deviation of helical gears, including tooth shape deviation, tooth pitch deviation, etc; FA is the normal load between two tooth surfaces; δ A is the deformation in the direction of the helical gear meshing line under the action of a unit load.