4
$\begingroup$

I want to make a "gearbox" that will transform input rotational movement to an output rotational movement with the same speed but in the different direction (clockwise / counterclockwise) on the same axis. How can this be done?

mystery gearbox

$\endgroup$
8
$\begingroup$

Option 1 - just reverse direction without affecting the speed: Bevel gears in differential gear setup, with the carrier (the axle on which the intermediate gears are located) fixed to the chassis.

enter image description here

Option 2: reverse direction and change speed by a large amount. Planetary/epicyclic gear, fixed carrier (the green part in the image below) fixed to the chassis with the second shaft connecting to the ring gear (pink). Changing gear ratio between the ring gear and the sun gear (yellow) changes the speed and torque on top of reversing the direction.

enter image description here

Option 3: Use two universal joints to offset the shafts relative to each other, so that they are no longer in line, then use a standard gear to reverse the direction, possibly changing speed a little in the process.

enter image description here

$\endgroup$
2
$\begingroup$

Bevel gears to each of the axles and one meshing with both of them attached perpendicular to the gearbox.

Essentially a differential where the input shaft is locked.

$\endgroup$
1
  • $\begingroup$ I'd throw in a few more details. I know how a car's differential works, and even so I read your last line as "limited-slip differential," which of course has both shafts rotating in the same direction. $\endgroup$ – Carl Witthoft Mar 21 '17 at 13:48

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.