New idea for the pass-through axle

[BigSki]

I have an idea that would allow the output shaft on the pass-through axle to rotate in the same direction as the input shaft, this would eliminate the need to flip the rear axle in order to get it to turn the tires in the correct direction.

I'm just curious if anyone would even be interested in this part or does it not bother anyone to flip the rear-most axle?

 

[BigSki]

OK, the thread didn't generate any responses, so I'll share the idea. Maybe someone can make it a reality.

My idea was to make a pinion gear with a long enough shaft that would pass through to the rear output end of the axle. So instead of having 2 pinion gears meshing with the ring gear, only one ( the input end) would mesh and the long shaft would pass along the face of the ring gear then come out of the back of the output side of the axle. This would keep the smaller driveshaft between the 2 rear axles spinning in the same direction as the input driveshaft.

This would allow the rear drive axle to remain in the "normal" operating position, making it a bit easier to fab up trusses and link mounts.

 

[jeeper_05]

OK, the thread didn't generate any responses, so I'll share the idea. Maybe someone can make it a reality.

My idea was to make a pinion gear with a long enough shaft that would pass through to the rear output end of the axle. So instead of having 2 pinion gears meshing with the ring gear, only one ( the input end) would mesh and the long shaft would pass along the face of the ring gear then come out of the back of the output side of the axle. This would keep the smaller driveshaft between the 2 rear axles spinning in the same direction as the input driveshaft.

This would allow the rear drive axle to remain in the "normal" operating position, making it a bit easier to fab up trusses and link mounts.

Where would the diff/spool be? Axles?

 

[jebster]

Not sure I see it. The long shaft you are talking about would have to go thru the spool, which wouldn't work. What you are describing sounds like a worm drive setup vs a standard ring & pinion.

 

[FATBOYrs10]

sounds like too much BOOZE, and not enuff BRAIN in your thinking on this.......LOL.


it's like the other 2 forementioned post.........it'd be like throwing a stick thru the spokes on your bike!!

 

[BigSki]

Not sure I see it. The long shaft you are talking about would have to go thru the spool, which wouldn't work. What you are describing sounds like a worm drive setup vs a standard ring & pinion.

You are actually 100% right, I completely brain farted on the fact that the spool attaches to the face side of the ring gear, which would be in the way of the long pinion shaft. back to the drawing board...

 

[Gula]

Are you having issues with mounting holes on the axle once it is flipped? If you are using most axles, other than HPIs wheely/crawler king that could be an issue! Same goes if you have to shave those pesky servo posts, etc. HPI made their axle case symmetric when cut in half almost, and left the mounting points as separate pieces to be mounted in either direction! It's just not a very scale looking axle.

 

[BigSki]

Are you having issues with mounting holes on the axle once it is flipped? If you are using most axles, other than HPIs wheely/crawler king that could be an issue! Same goes if you have to shave those pesky servo posts, etc. HPI made their axle case symmetric when cut in half almost, and left the mounting points as separate pieces to be mounted in either direction! It's just not a very scale looking axle.

I've only ever built 1 6x6 and I didn't have too many issues with the drive train, I was trying to think of another way of doing the pass through axle. I think that short of rc3wd making the rockwells in plastic, the current way of doing it is probably the best way for now.

 

[thurayt]

I had thought the same thing for my 6x6 build. Even if you made a custom spool, the axle shaft would be in the way.

 

[Calderwood]

If we could ever get an axle with real hypoid gears this would be possible since the pinion shaft could run under the spool. I've always wanted hypoid gears for strength but this could just be an added benefit. Its a shame that custom gears are so expensive or else I would make the housings. I already have CAD drawings made for a couple dream axles.

 

[BigSki]

I was thinking that if the spool attached to the opposite of the ring gear, there could be enough space for a shaft to pass through to the back side of the diffy.

 

[Steve118]

I have a better idea, it would mean just using two axles unmodified.

Basically a trans case with two rear outputs. Then a short prop to the middle axle and a long prop to the back one with a carrier mounted to the side of the diff housing on the middle one.

Got this off a GMC Deuce and a half, WW2 Red Ball Express truck.

How does that sound?