MOC Rear drive chain

[Phantom59]

http://www.mocpages.com/moc.php/308061

I wanted to see if I could make a simple rear drive train for a tumbler (Batman) (of sorts)

The two XL motors feed into a dif (I got the idea off a forum) drive shaft to anther dif then drive to the Portal Axles

When I got it all working, I realised I could put a diflock of sorts on it, the small LA moves the diflock on and off the rear gears.

Edited February 6, 2012 by Phantom59

[DLuders]

@ Phantom59: Could you describe the functions of the various parts in your four MOCpages pictures below? How does the locking differential work?

[timslegos]

the locking diff works by the arm coming down and having the gears connect to both sides of the diff so that they spin at the same rate. Did i explain that well ?

very clever idea! i might have to sue this idea in one of my MOC's.

tim

[andythenorth]

Nice difflock

From experience, two XL motors used in that way with a diff will shred gears quickly. You need a much bigger custom diff, or make it easy to remove and swap the broken gears out.

Edited February 6, 2012 by andythenorth

[Crtlego]

As andythenorth already said, I too believe that there is a risk for damaging parts with this setup. I actually find that the portal hubs are appropriate for the speed and torque but that, if any gear were to break, it would be either the "differential lock" gears or the small bevel gears in the differential will break.

I decided to build the Tumbler last year and I haven't gotten around to producing a video of it or uploading any pictures.. I hate myself for this..

I do, however, feel I should share my experience with the rest of you with this simple picture. This was pre-portal hub-era and the Unimog had not yet been revealed, and thus, there was no "perfect" way to add in that last minute gear reduction (like that of yours after the differential). The setup did provide speed and torque to the rather large and heavy Tumbler. In fact, every time I accelerated forward, the entire vehicle jerked.. I like to think that it was because of the "significant torque" but I think it is the setup of the suspension instead.

Not visible in the picture are the four 8297 balloon tires I used for the rear axle. Also, beneath the black 12t bevel gear, there would normally be a 20t bevel gear; it is missing because it can only be held in place by the axle built into the tires themselves.. <--This is a flaw because this gear, along with a half-bushing on the other side, are the only things preventing the heavy axle from slipping out from the car/tank/Tumbler..

Also, I have yet to purchase the longer springs and I feel that with the new portal hubs, ball joint (the one in the Unimog), and some nice suspension, my MOC could have turned out a little nicer.. Obviously, I have not disclosed any pictures or videos of it so you don't know what I'm talking about..

[Phantom59]

Nice difflock

From experience, two XL motors used in that way with a diff will shred gears quickly. You need a much bigger custom diff, or make it easy to remove and swap the broken gears out.

I am glad someone was able to explain about the works of the diflock

I am not good with explanations

Thanks for the tip about shredding of the gears. Oh well back to the drawing board

Edited February 7, 2012 by Phantom59