An omnidirectional electric motorbike that in place of wheels uses technology to balance on a single large sphere.
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2026 Update - The "TALON" pictured here in 2018 was my major project for a BSc in product design.
It's not just a mockup, the omnidirectional ball bike was designed to be fully functional.
Unfortunately I spent my very last penny getting to the show and with life getting in the way, never again found myself in a position where I had both the time and money to finish the thing.
So after a long hiatus I am hoping in the coming weeks that will change!
Testing the drive mechanism for the first time, the ball bounces around quite a lot in this video, a few reasons for this;
- The ball is not a perfect sphere, it has a number of indents that result in temporary loss of contact with the drive wheels.
- Transfer bearings intended to guide the ball have not yet been fitted - see holes in end of legs.
- Everything is upside down, gravity does a better job of holding everything together when the heavy bit is on top.
- Got a bit carried away...
The original idea for an omnidirectional bike was planted a number of years ago in a late night conversation with my brother, I had just started dabbling with self balancing devices & my brother was eager to contribute.
At the time the idea of making a bike that balanced on a ball seemed a bit to much of a challenge, for starters where would I find such a large ball?
In the habit of keeping a sketchbook for our weird ideas (squirty cake anybody?) I did a couple of quick sketches.
BTW - Still haven't found a way to make squirty cake, any ideas?
Skipping ahead a few years and with a good number of crazy contraptions under my belt I finally decided to go to university. (I was 25 at this point, my school grades hadn't been that great and I didn't think I would ever go, ultimately it was a self balancing unicycle that helped me get in).
At uni the projects in the first two years were set, however in the third year you get to choose your own projects, I instantly knew what I was going to work on.
As mentioned in the project introduction I have been slowly chipping away at this project for a while now, the initial design work for the bike plus a whole load of research was done by myself during the degree, since graduating I have been attempting to pull it further into reality.
As it stands I have almost completed a hardware prototype, the intention is to use this as a development platform for the electronics & software, then use everything we learn to come up with an improved design. (Already have a few things on the list)
In the next couple of project logs I will go over the design/prototyping work that led me to this stage and explain how I made the prototype.
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If you can live with some small radius of turn of the device (which, to me, is perfectly acceptable), you could get rid of omni-wheels and use regular, rubber covered wheels. Less noise, less maintenance, cheaper, more durable, can carry more load. The list can go on and on.
Reminds me a bit of the Bombardier Embrio concept a few years back: http://www.diseno-art.com/encyclopedia/strange_vehicles/bombadier_embrio.html
I have had it in mind to develop something similar - a wheelchair, or rather, a ballchair. Conventional electric wheelchairs are awkward to manoeuvre in tight spots, and operating on a slope puts the whole chair on an angle, and can overturn. I think it could be done, but there would have to be emergency "parking" mechanism that would stabilize the chair if the balance system failed. I concluded the thing would get very bulky, complex, and would be difficult to meet Australian standards for public powered mobility devices.
Oh, there's your suspension- a multi-layer construction for the ball.
Rigid ball? Harsh ride. Guess a regular ball would deform and jam in the frame or deflect away from the drive wheels.
Your not wrong, unfortunately most balls of this size are really soft, I've managed to source a plastic walking globe (circus ball) for the prototype, which at least allows me to test the drive mechanism.
I'm expecting the first prototype to be a bit of a bone shaker, the idea is to either manufacture a semi rigid ball or introduce some form of suspension into the next iteration of the design.
Any multilayer construction for a ball that size? How about some bounce to the seat like suspension seatposts for bikes.
Have been toying with the idea of 3D printing a mould for the ball to give rotary casting a try, or 3D printing interlocking tread segments and inflating a gym ball inside to act as an inner tube.
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Here is very similar application (opensource, I believe). You could use it in your work.
https://www.linkedin.com/feed/update/urn:li:ugcPost:6540687171635023872
https://dms.licdn.com/playback/C5605AQEPPBT0aJ7cCw/14a853ce5d8042aea813624f8eb4be14/feedshare-mp4_3300-captions-thumbnails/1507940147251-drlcss?e=1559671200&v=beta&t=jTbfWmw2ykDrwV_atBN_X8bD4sZR__jvCD5oNab1iyg
https://github.com/mindThomas/Kugle-MATLAB