Auto coupling with a motor

[abnabb]

I have a metallic roller (dia: 80 mm, thinckness 10 mm) controlled up/down by a pneumatic cylinder.
when reacing its down position it should be coupled with motor axis (which rotates the roller).

what kind of coupling mechanisum I can design/select?

alternative I have to fixed the roller with motor and move both up/down (may not be desireable)

Thanks

 

[DLite30]

Depends on how much peak-to-peak travel the cylinder is moving. Different couplings have different allowable degrees of movement.

It probably would be best to move the whole assembly, motor and cylinder as a whole unit, instead of having the motor stationary.

 

[abnabb]

I guess I would move the motor and roller assembly together.
should I just mount assmbly with the cylinder or use linear slides?

 

[Compositepro]

There are many ways. This is done with nip rollers all the time. The best solution depends on factors you have not mentioned. You can use a chain drive, gear drive, drive shaft with universal joints, Schmidt coupling, etc.

 

[IRstuff]

Something that's often used is to have the coupling continuously applied, i.e., with a chain or belt drive as suggested by Compositepro, via an idler wheel that takes up the slack when the roller comes back down.

TTFN

FAQ731-376