So we are looking into a pivoting arm system for a cargo shooter, but we aren’t sure how to get it to pivot. So far, we are able to get a hex shaft driven by a versaplanetary and chain driven setup that is geared down to our liking, but our problem is getting the mounted hex shaft to somehow pivot the set of arms it’s near.
Typically for this application, I’ve seen teams use two gears near the pivot point, but if I’m not mistaken, I believe that involves needing to broach the aluminum that the hex shaft will sit, and we do not have that capability at the moment. Right now, we have the hex shaft mounted in flanged hex bearings.
Basically, we are looking for a low tech solution to transfer motion from a rotating hex shaft to a pivoting arm.
Any and all suggestions are welcome!
Thank you!
-6398
If you go on vex they have something called plate sprockets. You can put a bearing in the sprocket, mount it in a hex shaft, and then bolt the sprocket to the arm. Attach a chain run to that sprocket and arm will rotate
I can post a picture of the set up if you’d like too
I sort of understand what you’re saying, but a picture would be awesome!
https://a360.co/2TLyFC0
Here’s link so you can view the CAD. Feel free to download it too if you’d like. I haven’t modeled the screws but in the big sprocket, they’d go through that and through the center tube. Then when the motor in the back spins, it’ll rotate sprocket which rotates that forward arm.
Look into VexPro VersaBlocks
That too. The bolt circle on the versablocks also line up with sprocket one so its really easy to make an arm then
We have used hex hubs to connect arms to hex shafts.
We do the same, it works quite well for us, using a hex hub to fix the sprocket to the shaft, and another to fix the shaft to the arm.