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One direction way rotating hub for propshaft
MK9R - 17/6/10 at 07:31 AM

No idea what to call what i want, and not sure if it exists in the guise i want. But here goes:-

I want to be able to create a prop shaft that transmit drive if turned in one direction, but freely turns in the other direction, i.e. just like a bicycle rear wheel.

Now i have thought that maybe free wheeling hubs off a 4x4 would be suitable, but there seems all different sorts, plus these hubs don't really lend themselves (due to there size and shape) to be fitted inline on a prop shaft. Any ideas??

tony-devon - 17/6/10 at 07:41 AM

a one way clutch bearing in a custom assembly sounds like the sort of thing your after, but you will have to check the forces and sizes etc

Im using them for the electric reverse setup on my trike build

was that mesh any good?

MK9R - 17/6/10 at 07:46 AM

quote:
Originally posted by tony-devon
a one way clutch bearing in a custom assembly sounds like the sort of thing your after, but you will have to check the forces and sizes etc

Im using them for the electric reverse setup on my trike build

was that mesh any good?


I'm trying to find a sealed unit that i could just bolt on to a modified prop.

Mesh was perfect thanks, i need to sort you out some mullar!!

britishtrident - 17/6/10 at 08:10 AM

Rover used one on the early P2 Cyclops anuntie Rovers.

It was later banned from use..

Mal - 17/6/10 at 08:22 AM

Try this company.

Cross and Morse.

http://www.cross-morse.co.uk

HTH
Mal

MK9R - 17/6/10 at 08:28 AM

quote:
Originally posted by Mal
Try this company.

Cross and Morse.

http://www.cross-morse.co.uk

HTH
Mal


looks very interesting!!

nitram38 - 17/6/10 at 08:47 AM

Why would you do this?
What would you gain?

MK9R - 17/6/10 at 09:05 AM

quote:
Originally posted by nitram38
Why would you do this?
What would you gain?


The gear ratios on the freelander diffs mean that the front and rear prop shaft rotate at a slightkly different speed under normal driving conditions (approx once a second at 70mph), the slip is allowed for by teh viscous coupling slipping, if the slip rate increases the viscous coupling becomes stiffer and transfers more power to the rear wheels (i.e. off roading). Even at normal and correct working operation, there is forces being tansmitted down the 4x4 system which reduce MPG and the car actually drives nicer in just front wheel drive. So be able to divert all drive away from the rear wheels under normal driving conditions would be ideal, but still leave 4x4 option if and when required

MikeCapon - 17/6/10 at 09:05 AM

Old Saabs also had freewheels you could switch off (lock up) with a lever on the transmission tunnel. I think it was mainly the two strokes but possibly some of the early four strokes.

Liam - 17/6/10 at 11:51 AM

I guess you've probably checked, but is the speed difference in the right direction for this to work and not just disable the 4wd altogether? i.e. is the rear side of the VC spinning faster than the front side as standard? If not, and the front side is currently faster, when you add the freewheel mech, and you slip the front axle, it'll just freewheel faster and you'll never get 4wd.

MK9R - 17/6/10 at 11:54 AM

quote:
Originally posted by Liam
I guess you've probably checked, but is the speed difference in the right direction for this to work and not just disable the 4wd altogether? i.e. is the rear side of the VC spinning faster than the front side as standard? If not, and the front side is currently faster, when you add the freewheel mech, and you slip the front axle, it'll just freewheel faster and you'll never get 4wd.


Yes rear goes slightly quicker