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17

The most common I've seen is rack and pinion: Essentially you have two parallel beams with one fixed to the car's chassis. The other bar moves horizontally which changes the direction of the wheels. Attach some gears and you can hook it up to a steering wheel. The steering technique has been used in the Whirl N' Wheel Super Truck (5590) set. The ...


10

It's difficult, but not impossible. A rigid axle turning at the centre would be mechanically simpler. As my crude drawing illustrates; I would place a 24-tooth gear over the 2x4 wheel axle. A 8-tooth gear is optional but will provide finer control over the steering. The two teeth gears can also be replaced with a pulley gear. This technique however will ...


6

This can be done without a caster wheel as well: Start out with a three wheeled vehicle, with two wheels in the front and one smaller wheel with less traction than the front wheels in the back. All wheels need to be fixed. One of the front wheels is attached to the motor. This might need to have some gearing to get an appropriate speed. The other front ...


3

I was able to find a few elements that are able to make this connection possible. I'm guessing the designer used some type of bar-sized element which is made from a different material that is able to compress slightly more than regular ABS. For example, the softer plastic used on some minifig weapons seems to work nicely: Another option could be flexible ...


2

One motor and a caster wheel will give you two degrees of movement but will not be steerable. If you can build a differential, then drive two wheels with the motor. If you have limited gears, then drive one wheel, have an idler wheel and a caster or simple skid arrangement. You can get more interesting behaviour by having a bumpbot, that simply reverses ...


2

Too much backlash (play) in LEGO gears is an universal problem that unfortunately can't really be mitigated since all compatible LEGO gears are designed with very loose tolerances compared to professional gears. According to Sariel the bevel gears you tried using already have less backlash than regular gears, so you can't really expect any improvement by ...


2

Here is a possible implementation using this exact part: Video . There are also several other solutions with different pieces if you need more inspiration or explanation: Animated GIF, 4 wheel steering, Top-down view.



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