new moc help needed

[rumpletump]

Hi Guys I need some help..

I have a motorized Input and the output will be to drive the wheels of my new project.

I want to make a one way clutch type setup so when the motor stops the wheels can still free wheel (so my vehicle will roll under momentum).. Does anybody know a simple solution to make this happen?

I have 2 x diffs of the type found in the 9398 and an assortment of gears at my disposal.

Cheers -

Henry

[OleBM]

Hi Guys I need some help..

I have a motorized Input and the output will be to drive the wheels of my new project.

I want to make a one way clutch type setup so when the motor stops the wheels can still free wheel (so my vehicle will roll under momentum).. Does anybody know a simple solution to make this happen?

I have 2 x diffs of the type found in the 9398 and an assortment of gears at my disposal.

Cheers -

Henry

Check out LPEpower's one-way clutch solutions: http://www.lpepower.com/content/one-way-clutch-instructions

These work extremely well, and is very simple :-)

[rumpletump]

That is a good idea. I was hoping for a more "gears only" solution using diffs.

[Bzroom]

I dont think you can do this with just gears. You need friction of some kind, and a lot of it.

You could probably put the input shaft in one end of the diff, and the output shaft out the other, and then lay a ratchet onto the gear on the diff housing.

This way, torque would push into the ratchet and be transferred through the internals when the motor drives, but when the drive-shaft back-drives, the diff housing would spin and the ratchet would click, click, click.

Driving your vehicle through diff gears is likely going to break something I imagine though.

[Saberwing40k]

Why don't you just use a ratcheting system like in 9396? I'd show you a picture, but I'm currently on my phone, which hates the site.

[rumpletump]

@ Saberwing40k... Yeah I know exactly what you mean, That is my back-up option. I was just putting it out there to see if any other solutions exist.

[Nazgarot]

Hi,

At least one other solution exists. I don't know who made this, but it an ingenious idea. It works just like the clutches of nitro rc cars. If you want a tougher locking of the clutch you can use 8 tooth gears to make it engage when the motor starts.

My version with gears locking it (I could not make it allign with 3 clutch shooes, so I reduced it to two).

The red axle goes to the motor, and green to driveline:

-ED-

Edit:

Just found the homepage of the maker: http://p-lego.blogspot.it/

He presented the clutch on Eurobricks a time ago along with a 3+R gearbox.

http://www.eurobrick...showtopic=77753

Edit 2:

After I got of the jjob network I found a good picture (was blocked by a firewall)

Edit 3:

Included my own version.

Edited March 13, 2013 by Nazgarot