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I have designed this reinforced differential for a large 2 differential steering system for a very large tank model in the far future. I lack the small turntables to build this at the moment, but I believe this will function correctly and be a medium sized differential that doesn't utilize the large turntables. Since I lack the small turntables, I think this will work, but I'm not sure how well it will hold up to torsional stress, but this could be fixed if there is 2 gears being used to power both turntables in sync. It may be prone to seperation where the turntables are connected to the main frame of the differential.

Version 1

http://www.bricksafe...erential xl.ldr

Tommy%20XL%20Diff.png?dl=1

Screen%20Shot%202015-04-08%20at%201.12.34%20PM.png

Screen%20Shot%202015-04-08%20at%201.12.45%20PM.png

Version 2

I reinforced the differential

http://www.bricksafe...ntial xl V2.ldr

Screen%20Shot%202015-04-08%20at%201.49.10%20PM.png

Screen%20Shot%202015-04-08%20at%201.49.26%20PM.png

version 3

Version 3, I took Zblj's suggestion and replaced the 20z's with knob gears.

http://www.bricksafe.com/files/Tommy_styrvoky/differential%20xl%20V3.ldr

Screen%20Shot%202015-04-08%20at%204.44.56%20PM.png

16894496238_c2bd759044_c.jpgdifferential xl V3 by Tommy Styrvoky, on Flickr

17080783692_d431de34e4_c.jpgdifferential xl V3 exploded by Tommy Styrvoky, on Flickr

Edited by Tommy Styrvoky

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Can you please also post a picture?

I will try, as I am at school and for some odd reason I can't upload photos to flickr, but I can try uploading to bricksafe.

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Sorry but that is IMPOSSIBLE to build. Tricky to build :laugh: Use knob gears, they are stronger.

Edited by Zblj

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But how you will connect 5L liftarm in the middle and #1 connectors? :blush: Some force?

It's possible to assemble without force, it's just a puzzle.

Version 3, I took Zblj's suggestion and replaced the 20z's with knob gears.

http://www.bricksafe.com/files/Tommy_styrvoky/differential%20xl%20V3.ldr

Edited by Tommy Styrvoky

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For even further locking of all parts you might want to use two thin 5L beams with crossholes at the end instead of the 5L thick beam in the center. That way the #1 connectors are fixed in rotation. In practice it will stiffen the structure I think.

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This differential build looks like it is going well. It will be interesting to see how the reinforced differential will work out with both kinds of gearing bevel and knob. The knob gears when under high load tend squeak after a little while.

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For some odd reason I forgot to have the newer color for the 5 long axles, the instructions have been updated, and I am preparing to upload this to rebrickable. Also I will begin designing a XL dual differential steering system.

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This is a pretty clever idea! Would this be useful for subtractors for tanks?

For any other application, it seems 2 perpendicular knob gears would be best.

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Has anyone actually built this?

From the pictures i think it will break under high load

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Has anyone actually built this?

From the pictures i think it will break under high load

It should be structurally solid, if it is reinforced correctly in the frame around it. Where do you think the differential will break ?

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differential xl V3

If you look at this picture

I think there is nothing that prevents the turntable on the right side to go "up" (and the left one to go "down")

But i think it has to be built to check that

Edited by DickesC

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https://www.flickr.c...07/17061951286/

If you look at this picture

I think there is nothing that prevents the turntable on the right side to go "up" (and the left one to go "down")

But i think it has to be built to check that

That's the only place that I worried about, but if the differential is build in a sturdy frame, I don't think it will be possible to force the central section out, as It would require an immense amount of force between the wheels.

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