pic: Proto Type Base Built

[joeweber]

loading photo ...

[Everett33]

What size square tubing is that and what did you use to bend it?

[asid61]

Why wide over long?
Looks pretty neat.

[zachrobo1]

How are you planning on mounting gearboxes, wheels, etc?

[joeweber]

The tubing is 3/4 x 3/4. We bend it using a 3/4 EMT pipe bender used for bending electrical conduit. For mounting the wheels we will build pillow blocks that will allow us to adjust tension on the chains. The drive system is the same that we used last year, super shifters modified into a modular system that can be remove with just four bolts. More pictures can be viewed on our web site: http://www.team1322.org/ideas.htm#ANTI T-BONE FRAME

[Brandon Zalinsky]

What was your reasoning behind the design of the interior frame pieces? It seems at first glance like two rails of C-channel, one on each side, perpendicular to the front and back rails, would have done a better job of holding the transmissions and bearing blocks, rather than the bent tubing shown. It also might be less complicated to build.

[IKE]

Very neat frame. One item I would caution about bending square tubing, You inherently weaken the column loading it can handle. Assuming the flat sides are the front and back, you will want 1 or 2 pieces to run for-aft on a chassis like this that are nice straight columns. Otherwise, with hard impacts, I would expect this frame to continue to bend and compress in length.

[joeweber]

This frame is designed around our drive system which you can view on the link. When the drive is mounted it will add front to back support.

[Brandon Zalinsky]

Which part of the drive do you use to strengthen the frame from front to back? Do you use the transmissions as stress members?

What I was talking about in my last post would look something like this:


/|---|\
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(with the dotted front rail being at the front of the robot, I don't have a character that is a high horizontal line)

[GeeTwo]

Here's the image from the team 1322 site:


Built that in two hours? Wish we could get our build team anywhere close to that speed.

[joeweber]

As shown above we use a special built bracket that we made for the super shifters to help strengthen the frame. We removed the 5 x 5 square tubing from the gear boxes and replaced it with the bracket which allows us to move the frame up a few inches in the bumper zone.
http://www.team1322.org/20140612_201621.jpg