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Building a Robotic Rock Crawler Chassis

A keen electronic engineer with a passion for automotive systems and autonomous robotics. A progressive love of cars, engines and classic mechanics. Advocate for clean energy, transport and alternative fuels. Compulsive tea drinker. BrightSpark 2017. BEng MIET


November 2, 2020 09:29

Hello, that is a very good project. I have the idea of maybe, mounting the same linkage of rods and shocks on the inside of each motor. By doing this you will need another pair of aluminium rails on the inside ( or just 1 centre rail). The end result will be a Lunar rover, with 4 independant wheels and a flat main frame. You have to do some testing to see if the new setup works, because I could be wrong. And later you can add a controller that gives a boost to the wheel motor that goes up and down, so it can overcome the resistance.

November 6, 2020 08:08

Hi @doshevi I'm glad you like my project and thank you for your suggestions. Fully independent suspension will always be something I aspire to and its implementation fascinates me. I know a lot of high-end sports cars and landrovers use electronic controlled suspension alongside traction control and torque-vectoring to govern the power sent to each wheel in reaction to changes in terrain and grip available. As you suggested, it would be exciting to experiment with a similar system in any future updates. :)

November 5, 2020 09:35

  • Moderated

@doshevi Yes, and if the motor gb output was at a right angle, the ground clearance in the center of the rover would be higher (take it from a guy that stuck his 46 Willys Jeep on both pumpkins on a rock at the same time). A secondary upper box frame (like a box kite) would strengthen the framework and protect power and electronics.

November 6, 2020 08:08

@m6_dodds these are great suggestions. I did consider using right-angle gearboxes initially but inline motors worked more effectively with the solid-axle design. The lack of a mechanical differential does help reduce the risk of grounding out on your axles but some might argue that doing so is part of the fun. ;)

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