Regen keep untightening my bolts/nuts

[cwah]

Hello all,

I'm using a leafmotor around 4KW peak and around 1500W constant... and I've been using 2 torque arms and nord lock washers... but for some reason it keeps loosening the nuts when I use regen.

It remains strong for few rides but quickly they start to be loose.

Has anyone found a solution around that?

Thank you

 

[motomech]

Safety wire like the racers do.

https://en.wikipedia.org/wiki/Safety_wire

 

[amberwolf]

sounds like your dropouts might be deforming and allowing the hardware to move. cant' think of anything else that would let nordlocks/etc come loose like that.

 

[cwah]

yes dropout are done and the motor is held by the 2 torque arms...

However, it doesn't feel good enough... not sure if safety wire could be used in my case?

 

[amberwolf]

if the dropouts arent' there or able to provide the axial pressure for the nuts to keep the nordlocks together enough so the nordlocks can pressure the nuts and keep them from turning, then the systme isn't stable and it will keep doing what you see.

safety wire might work but it needs to go thru castellated nuts and a hole in your axle, or some other thing that keeps the nut from rotating at all. without that the nut will still loosen.

sounds like you need to replace your dropouts with torque plates.

 

[teklektik]

Did you put washers under or over the NordLocks?
That will defeat the locking effect. They should go directly between the TA and the axle nut.

 

[dogman dan]

You need torque plates that pinch the axle, so you can properly twist the axle off the motor.

 

[Ykick]

You need torque plates that pinch the axle, so you can properly twist the axle off the motor.

 

[cwah]

No washer under the nordlock... here's the current configuration:

Open the image externally to see the whole picture (I don't have the tools with my new laptop)

What's the best way to create a torque plate with minimum tooling available? Where to place and what shape to cut?

Thanks

 

[dogman dan]

It's just that your very good plates still have some wiggle room, so regen wiggles the axle back and forth, loosening the nut. Amazing though, it does it that fast with the special nut.

This is how I do a cheap and easy pinch dropout.

 

[teklektik]

No washer under the nordlock... here's the current configuration:

Nord Locks work in part by biting into both the surface and nut with the fluting on the outside of the cam washers (sort of like super WhizNuts). This keeps the washers and nuts in place even under minor rotation - which is taken and then released by the inner cam faces without the nut walking. I wonder if the hard steel of Doc's TA is hampering a good bite and allowing the fluting to rotate...

Here's two tests to see if the Nord Locks are actually locking properly:



Anyhow - not working for you...