EMTB gear drive design and build

[Archer]

@ShutterShock

@ShutterShock

It’s basically a clone (I don’t care if it’s inspired by BN or not) with maybe 1 benefit or 2, at the same price point.

This is a bit harsh mate! I’ve never handled a Boardnamics gear drive or seen any of their engineering drawings. This is my own design and is completely from scratch.

There are a lot of design differences, for instance my support bearing is inside the hub mount and Boardnamics seems to have their support bearing inside the casing itself. Also, their casing design is pretty different to mine, it appears to be thicker to accommodate the bearing and has a flange around the pinion gear section. In addition, they appear to use an o-ring shaft seal instead of a v-ring. I could go on…

@Venom121212

If you asked 100 people familiar with esk8 gears to design a case, I’m confident a lot of them would look like 2 circles, larger than the gears, joined together in a metal casing. Moon’s gear drives are nice aesthetically because he drafted them in and blended the overlap of the 2 case circles instead of making it look like… 2 circles. Look at helical Russian plastic gear drive as well. It’s a more simple design approach

I could knock out a gear drive case in under an hour and it would look similar to this or moon’s depending on how hard I felt like trying… Absolutely no disrespect intended. It’s just the natural design process to house 2 differently sized gears while taking up the least amount of space. Just like how our enclosures are just big rectangles with different shaped edges.

Just to elaborate on what @Venom121212 has already described, all electric skateboard gear drives design will look alike, without reinventing the wheel. Firstly, you have to design your two gears, you decide what gear ratios you need, what the maximum size your gears can be without causing ground clearance issues. I did start off with a module 2 gear drive design, then I realised I needed an 8-tooth pinion gear which, is way below the minimum recommended number of 17, so I switched to a module 1 gear design. It’s not like Boardnamics has patent on module 1 gears or something.

In terms of the gear drive casing, its aways goanna look like snowman shape, if you want them to be as small as possible and conform to outline shape of the two meshing gears. MOON, Boardnamics, Trampa, 3D Servisas gear drives all look and function very similarly because of this. The only truly unique gear drive approaches that I can think of, would be to try and use internal gears, like this guy:

3D printed Inner Gear Drive | Trampa Holypro | VESC 6 | Overion 130kv | GT2B + Arduino

Hey people! As you might remember from the other forum, i’ve been working on a 3d printed inner gear drive for my trampa mountainboard. Why? idk man, i just wanted to see where the limits of fdm printing are and how far i can push it. This is basically the second edition of the drive. The first edition didn’t work out because i could never get the motor mounts aligned and stiff enough. I used it last year and it kinda worked, but it was far from perfect. Back then i used Taulman Alloy 910 fo…

I’ve only just joined this forum and so far everyone has been really supportive and helpful, even MOON who obviously has a conflict of interest with his own gear drive business. You are the only one who has brought negativity to this build diary, which find quite weird, I assume you may be tied in with BD as you have reviewed his drive. I started this gear drive journey because I’m an engineer and I love to design and build my own stuff and learn new skills. I’m not particularly fussed about the commercial aspect of this project, if people want to buy them, great! it will hep me fund new and exiting DIY projects, if no one is interested I might opensource the project.