Patent ID: 8463575

Claim:
A gear meshing angle detection method which detects a meshing angle of a work gear attached to a work rotation shaft, including a first process of obtaining a left tooth surface angle and a right tooth surface angle from a starting point of the work rotation shaft for all teeth of the work gear using a displacement sensor when the work gear is rotated in one direction; a second process of obtaining a left tooth surface accumulated pitch error and a right tooth surface accumulated pitch error for all the teeth based on the left tooth surface angle and the right tooth surface angle using a meshing angle detection device during rotation in the one direction; a third process of obtaining a left tooth surface maximum accumulated pitch error and a right tooth surface minimum accumulated pitch error from the left tooth surface accumulated pitch error and the right tooth surface accumulated pitch error, respectively, wherein the clockwise direction of the work gear is as a positive direction using the meshing angle detection device; a fourth process of obtaining an angle of a reference tooth groove based on the left tooth surface angle and the right tooth surface angle using the meshing angle detection device; a fifth process of averaging the left tooth surface maximum accumulated pitch error and the right tooth surface minimum accumulated pitch error so as to obtain a correction value of an angle of the reference tooth groove using the meshing angle detection device; and a sixth process of correcting the reference tooth groove angle by the correction value so as to obtain the meshing angle using the meshing angle detection device during rotation in the one direction.