I have a robot that moves around autonomously. Very often I want to push the robot several feet to start a test over again, or sometimes I want to wheel the robot outside to my car or to a nearby field.
Pushing my robot is pretty tough. Its 60lbs (27kg) and when I push it with the motors engaged its very difficult. I want a way to decouple the 2 back wheels so I can haul it around like a suit case. I've seen similar posts to this one where people suggested just leaving them coupled and recharging the battery. I don't really care to exert that much of my own energy just to recharge the battery. I just want to make transporting easier.
I also Want to be able to engage and disengage without the robot being on. This means that electromagnet clutches are out. Id like the solution to be under $300 and to be fairly easy to machine. I have access to a lathe, mill, welder... etc and can machine some complex stuff, but I don't want it to be like making a custom gear box.
Does anyone have any suggestions? I'm using standard dolly wheels from Northern tool. (http://www.northerntool.com/images/product/2000x2000/425/42570_2000x2000.jpg) I've considered a quick release pin but given the geometry of the dolly wheel that would be tough. The pin would hit the rim as you are pulling it out.
Thanks in advance for any suggestions.