Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
Gear mechanism causes notable noise and vibration synchronized with meshing contact cycle due to fabrication, wear and elastic deformation. To reduce the noise, some researchers have focused on changing cycle of meshing contact. The authors came up with an idea that helical pinion and rack gears that achieve non-constant transmission ratio can be applied to a cylindrical gear pair, and discussed a calculation method of the variable gear’s teeth profile for achieving a target non-uniform transmission ratio given as a function of an input angular displacement of a pinion gear with standard involute profile. This paper shows the experimental validation of a variable gear calculated by such method. The experimental result with respect to angular displacement of that almost matched theoretical one derived from a target transmission ratio, and the calculation method was confirmed as correct. On the other hand, frequency analysis was done to check the cause of transmission error and shows that some of the transmission error was caused by meshing contact error. Other than that, the acceleration caused by a variable of a transmission ratio is considered to rotate the driven gear by the angle of backlash, but the calculations show that the torque is small under the experimental condition.
