Mecanum Wheel with rubber wrapped rollers for TT motor

thingiverse

This is a remix of the 44mm Mecanum Wheel from Jonah_Innoart for the geared TT motor. I used elastic rubber tube to wrap the rollers to improve movability. Part list: - 27mm Dressmaker Pins - 4x TT motors - 4x RC servo screws - Elastic rubber tube (Inner diameter: 2mm, Outer Diameter: 5mm, cut to 22mm length each) https://www.aliexpress.com/item/32826819065.html?spm=a2g0s.9042311.0.0.27424c4dxN6rvZ Tools - 4x 2mm metal shaft (10cm long) https://www.aliexpress.com/item/32823043246.html?spm=2114.search0604.3.8.21321b2cLQ5DR2&ws_ab_test=searchweb0_0%2Csearchweb201602_7_10065_10068_319_10059_10884_317_10887_10696_321_322_10084_453_10083_454_10103_10618_10307_537_536%2Csearchweb201603_53%2CppcSwitch_0&algo_expid=7a639358-1b34-48bb-b316-4a76842517e3-1&algo_pvid=7a639358-1b34-48bb-b316-4a76842517e3 - 3D printed guide - 2x 3D printed shaft holder - Soap water - Spanner - Screw driver The most tricky part is how to get the small rubber tube to wrap around the rollers. Here are the steps Step 1: use some soap water to put 4 shafts inside the rubber tube (at the middle) Step 2: use the 3D printed Guide to widen the shafts evenly Step 3: put the Shaft Holders at the both ends Step 4: drop the roller inside the shafts via the hole on the Shaft Holder Step 5: twist the Shaft Holders in the opposite direction to expand the rubber tube (use spanner) Step 6: push the roller to the middle of the rubber tube Step 7: pull out 3 of the shafts first, be careful to let the rubber stay in the roller Step 8: roll the remaining shaft around the roller to get the rubber in place Step 9: pull the shaft out It may be a little bit difficult at first, but once you get the trick, it will become easy. I did it for all the rollers by myself, but if you have someone to help, it’ll be a lot easier. The shafts need to be hard enough to resist the strong shrinking force from the rubber, so the shafts should not be too long. Also, the shafts I used have tapper at both ends which make it easier to slide into the rubber tube and not tear the rubber. You may watch the video for to install the rubber tube from here https://youtu.be/U6cb269fAEs And the wheels in action in this video: https://youtu.be/aE9mXFiPOaE