Tamiya TL-01 Crawler/Scaler/Trail/Truck/bigwheel reduction Gearbox

[davidsen 85]

I had already uploaded this design as STL on Prusaprinters a while ago, but I think it might be interesting at this point as well. 

It all started when Timo had the idea to convert a TL01 with long shocks for some kind of trail vehicle, but the vehicle went way too fast with big tires. At that time I had bought a bunch of TL01 chassis (probably clones) and started to think about how to realize this. 

Since there is very little space between the wheels and the engine for a planetary gearbox for example, I had to come up with something else. First I looked at Tamiya for suitable gears, but then I found them at WL Toys. The great thing about these gears is that you can attach them to a 5mm shaft with a grub screw and they are available in metal and plastic.

The motor then had to be moved to another location, not good for the center of gravity but unfortunately no other way to do it. 

So the design could start, took forever but by now the transmission has run many miles and has so much torque that our neighbors boy managed to tear off three of four dog bones at once. I then installed the reinforced dog bones and they hold.

 

[davidsen 85]

I know it is somehow stupid to do this with a TL-01... but I don't care as it has been great fun and the result is nice trail car to go around the woods.

It can also be used for other projects like trucks, forklifts... whatever you want to run slow on a TL-01 or it's cheap clones. 

Everything is designed to even work on the worst 3D printery you can imagine as there is only one part that requires support (as far I remember).

[Nikko85 2658]

This truck looks amazing, great gearbox. What's the reduction? 

[davidsen 85]

Thanks! The Rock Socker body has been an easy fit. 

Forgot to mention the ratio:

If a 17T motor pinion is used the gearbox ratio is 1:3,64.

A 15T motor pinion gives you a 1:4,13 ratio compared to a directly attached motor. 

Means you get about 12km/h of speed using a 17T Motor pinion, a 19T "secondary" pinion and 130mm diameter wheels. (silvercan) 

[Mad Ax 7014]

That's awesome!  This is the kind of sideways thinking that I love about hacking old Tamiyas  

[Badcrumble 3703]

An excellent TL-01 upgrade!

I retired my first ever RC project, a Bowler-bodied TL-01 as it couldn't keep up with my other trucks in the rough stuff.

Now I see that it needs extended shock mounts, bigger tyres and a second gearbox!

[davidsen 85]

A short Video of the rig riding through the snow.