Spring loaded dog clutch

This being my first post I will no doubt be asking for info that has already been discussed at length previously, so please forgive this first timer as I'm not too savvy on the computer and so I could not find a previous thread that answered this query.

Could someone please tell me where I can buy the spring loaded dog clutch gear on the drive axles of the Tomy engines. They consist of 2 notched gears, each with 12 teeth , held together by spring tension. Overall width 6.5 mm Gear diam 7mm .

Cheers

Flat track

[Super]

I don't think I have ever seen a drive axle with two gears, what engine are you referring? A picture might help.

I don't think I have ever seen a drive axle with two gears, what engine are you referring? A picture might help.

I'm pretty sure they're talking about this one:

[Super]

Thanks Carn

I haven't come across one like that before. The only ones I have seen is in the picture below. I am curious if both gears actually engage in some way.

@Flattrack
I know of no place to buy these axles except for purchasing old, cheap trains on Ebay for spare parts. Some of us have had success with just Super gluing the two halves together, of course then the clutch no longer works. These clutches, although a great idea in theory to save the motors and gears, proved to get sloppy because of the constant pressure of children holding the train still while the motor is on. This does save the axle gear from stripping on the axle or splitting but eventually the clutch loosens up. I wonder if these axles can be replaced using one without the clutch spring mechanism and just a 12 point gear, haven't tried that yet but I will on my next clutch repair.

[ripley802]

Aren't these both the same type of gear? It looks like one is open and one is closed?

I agree I have never really seen anywhere to purchase these new only the used ones taken from junked trains.

[Super]

Aren't these both the same type of gear? It looks like one is open and one is closed?

Actually not, the right side of the I pictured does not have any teeth just smooth. It came from a Mattel Gullane flat drive chassis but I am curious if a regular 12 tooth gear can fit in its place for a repair with no clutch. I think the Western type steamers may have this problem if I remember correctly, I think I have one or two in the parts box I will have to check into.

Thanks to one and all for your comments. The gear ( aka what I would call a dog clutch) is certainly the one pictured above. It's function would be to prevent damage to the other gears and motor should there be an overload, like little hands stopping wheels from turning. Fusing the two gears together or replacing them with a single cog would work in theory but it may cause damage elsewhere later on. I guess that is a compromise one has to consider.
Should I come up with a viable repair alternative I will post it on the forum.

Cheers

Flat Track

[Super]

Let us know how it turns out for you Flattrack.