Half a croissant, on a plate, with a sign in front of it saying '50c'
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Self Balancing Tricycle

Roll, Spin, and Lateral move
 
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First, the prior art of this idea is every sort of two wheeled self balancing gadget which uses a left and a right wheel. Segways, hoverboards, and various clones.

That sort of balancing doesn't specifically need two wheels -- you could use just one wide cylindrical wheel, but you'd lose the ability to steer.

This idea is to balance and steer in the same was as these gadgets, and *add* the ability to move sideways, without turning.

We accomplish this by using mecanum wheels for the left and right wheel, and an omni wheel for the middle wheel.

To balance in place without spinning or moving sideways, all three wheels are equally spun forwards or backwards, just as in a two wheeled balancing device.

To spin, without sliding sideways, the mecanum wheels are spun in opposite directions, while the middle omni wheel is kept still.

It move sideways, without spinning, the mecanum are spun in the same direction as one another, and the middle omni wheel is kept still.

Obviously, combinations of various motion are also possible.

goldbb, Jan 08 2017

Honda scooter, they wimped out by https://youtu.be/T5vcWM0bhvc?t=100
..putting on a stabiliser at the back, the original didn't have it [not_morrison_rm, Jan 09 2017]

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