Constant Mesh Gear box - Transmission demonstration of 1:1 and 2:1

Last crawled date: 1 year, 11 months ago

This was completed as part of a university assignment in my final year of Electronic and Computer Systems Engineering at Victoria University of Wellington.

The brief was that within an enclosure space of maximum dimension 150 mm on each side we needed to show a functioning gearing system. The motor/shaft/bearings were provided from Servo City.

Following the following guide, we created bevel gears to shift the input through 90 degrees, onto a driven shaft with a fixed rotation velocity of 30 rpm.
https://www.youtube.com/watch?v=NwWi_WDGcTU#t=1116.945997


Then, to simulate a gear box, we used a variety of equation driven involute gears, helpfully described by this guide:
https://grabcad.com/tutorials/tutorial-how-to-model-involute-gears-in-solidworks-and-show-design-intent and further information from the Dudley Book of Gears.


In the exploded gear view image in the gallery it is possible to grasp how this system functions as a constant mesh gearbox.

Red gears are used for driving the output shaft. The middle collar is used to mesh the gear to the output shaft, or shift the system into idle where the output shaft will not be driven.

Green gears are the slave gears, and have a 1:1 or 2:1 gearing ratio respectively. These will be in constant motion as they are driven by the Blue gears, providing power to the system from the motor input.

In practice switching gears functioned well but was not the smoothest operation as there is no functioning cone system to bring the synchronised gear up to speed from idle.