skppo Posted February 13, 2014 Posted February 13, 2014 Hi! I was wondering if anyone has a solution on how to reverse the rotation direction of an axle in a way that is compact and has the input and output in line. Simplest I can come up with is using sets of 2 and 3 gears, first to reverse and second to reset offset. That how ever is far from optimal. Even a mechanical principle will be appreciated even better if you can build it too Thanks. Quote
efferman Posted February 13, 2014 Posted February 13, 2014 a setup like the internals of a differential? Quote
Hrafn Posted February 13, 2014 Posted February 13, 2014 Three 12t single bevel gears in an 87408 or 48496 ? Quote
D3K Posted February 13, 2014 Posted February 13, 2014 That is probably the most compact way, yes Quote
Zerobricks Posted February 13, 2014 Posted February 13, 2014 3 or 4 knob gears if you need lots of torque? or a blocked differential :) Quote
skppo Posted February 13, 2014 Author Posted February 13, 2014 I feel a bit stupid... Too bad I don't have any of those bevel gear cases. I guess I wanted something more impressive (odd) looking Quote
NevynPA Posted February 13, 2014 Posted February 13, 2014 If you don't need a lot of torque, you can 8T to 8T to reverse, and then use bushings and a belt to maintain the reversal of direction. Quote
SNIPE Posted February 13, 2014 Posted February 13, 2014 (edited) Compact, can be built with smaller gears and stud less beams too: Use the worm gear to select between the forward gear and the reverse gear. The worm gear would still slide if the motor were connected to one of the spur gear axles. I'm not sure if you mean inline as in parallel or inline from axle end - to end but there's bevel/crown gears for that Edited February 13, 2014 by SNIPE Quote
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