Two Gear Gear Train Gears

racecar builder

racecar builder

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They go on the side of Corvair differential to counter rotate axles. A pair of boxes.One on each side.That is the load they carry.

Gear train is just for weekend use around a parking lot slalom course.They can be the softest kind of gear material.They do not need to hold up that long.

I am picturing 4" diameter gears about 5/8" thick.

Straight cut spur gears will be fine.They are 1 to 1 gears.No reduction needed.

We will have to machine and weld centers.

Have to adapt cut off yoke coming in and another going out.'Interrupting' the splined yoke, so to speak.

Will those need to be made or is there an off the shelf gear available?
 
The VW van used a gear box at the wheel end of the axle. It had some reduction.

Greg
 
Thanks Greg

Yep.Get that a lot when I bring up our little project.

We figure just make them from scratch.

Used to have a post bookmarked where the guy made a PTO box for a lawn tractor that is real similar to what we want.

Two little gear boxes with two gears in them each.

In from the differential and out to each axle.
 
If your looking for an "off the shelf" solution........could sprockets and chain work?
They are available in many sizes.

-brino
 
Do you have enough interested parties to run a batch of straight cut spur gears with internal splines to your spec via EDM? I imagine it would be much easier to use the car's existing axle spline patterns to mod the axle shafts (if this is more than just a one-off) than it would to mod everything to fit an off-the-shelf gear (if one exists).

Sprockets and chain would not change the direction of rotation like a two-gear box will, which I think is the point of this axle gear box.

I've spent a lot of time with the HMMWV portal axles, they are quiet and high-maintenance due to constant seal failure. I also owned a VW van, which was quiet and low-maintenance. One would want the axle shafts to be well-supported with bearings as not to rapidly wear out the seals, if oil seals are part of the design.
 
Thanks Pontiac 428 and brino

We will just have to build these boxes one off.

Good tip about the bearings and the seals.

Seals are not necessary for this though.

Long as it gets around the track a couple times and does not run dry of lubricant.

Are doing one smart thing though.

Designing the car with a guesstimate offset and just getting on with it.

It is solo seat open wheeler.
 
Thank you Eugene

That kind of crossed my mind too.

If they can carry the load of a whole drivetrain they should be good enough for half what a Corvair puts out.

Downside is they may be too good.

In that from home machinist viewpoint they may be too hard and tough to machine easily.

But that is an amateur viewpoint.

We have a source for all the quickchange stuff a human being could possibly want.

Plus he is thinning out his accumulation.Almost gave him a call this morning about just this thing.

Will call him in the morning.
 
Buy the cheap ones from AFCO, Quartermaster and Winters are quieter, but more money.
 
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