CVT Tranny?

[lincpimp]

Originally Posted by What's_nitro?

I actually drew this before I hit "Submit Reply" on my first post but I forgot to attach it.

It's a belt-type CVT. Depending on the size of the belt and what it's constructed of it should handle BL power quite easily.

Going by your pic, I assume that the belt would require a spring loaded tensioner, like a serpentine setup on a car has. Unless you vary the effective diamters of the contact surface of both sets of "cones" exactly to allow the belt to retain the ideal tension at all times.

[brushlessboy16]

Originally Posted by lincpimp

Going by your pic, I assume that the belt would require a spring loaded tensioner, like a serpentine setup on a car has. Unless you vary the effective diamters of the contact surface of both sets of "cones" exactly to allow the belt to retain the ideal tension at all times.

they do not need a tensioner, you cent the motor shaft and output shaft's Center-to-center in such a way that the belt would allow the motor to "idle"

* i know this because we run a cvt style centrifigal clutch on my racecar*

centrigal force via ramps inside the primary clutch squeze the cones together, puting force onto the belt. At high rpm, then the cones are as close the belt gets tighter- this tension spreads the cones of the secondary unit, making the effective Pulley diameter of the primary larger then that of the secondary, creating overdrive.



Great concept but your would need to do extensive testing with different ramps, weights and springs to find a good mix

[lincpimp]

Originally Posted by brushlessboy16

they do not need a tensioner, you cent the motor shaft and output shaft's Center-to-center in such a way that the belt would allow the motor to "idle"

* i know this because we run a cvt style centrifigal clutch on my racecar*

centrigal force via ramps inside the primary clutch squeze the cones together, puting force onto the belt. At high rpm, then the cones are as close the belt gets tighter- this tension spreads the cones of the secondary unit, making the effective Pulley diameter of the primary larger then that of the secondary, creating overdrive.



Great concept but your would need to do extensive testing with different ramps, weights and springs to find a good mix

Thats cool, I was not aware that a mechanical method was used to vary the pulley size. I figured that it would be electronically controlled via some sort of electro-hydraulic mechanism.

[brushlessboy16]

Originally Posted by lincpimp

Thats cool, I was not aware that a mechanical method was used to vary the pulley size. I figured that it would be electronically controlled via some sort of electro-hydraulic mechanism.

nope its all centrifugal

as it spins, weighted arms pres against ramps that are attached to the moving cone.

heres a pic of mine