Epicloidal reducer.

[totilarussa]

Hello everyone, I should design an epicycloidal reducer (with helical tooth wheels) type '' to 3 cylindrical wheels', which must realize a transmission ratio of 0.25. the supplied data are the nominal diameter of the crown =52mm and for the helical toothing an angle of inclination of the helix α=30° and θn=20°.I have to establish the number of satellites (congruent with other geometric constraints) number of teeth, towards winding the helix for each wheel.I hope that someone can help me, thanks in advance.

 

[MBT]

Sorry, but...
apart from that I don't understand what the transmission ratio means to 0.25... what is it? a reduction 1:4 ?
but beyond that... what do we have to tell you?
Do you know how this forum generally works for this kind of problem?

 

[totilarussa]

I've already solved it.

Sorry, but...
apart from that I don't understand what the transmission ratio means to 0.25... what is it? a reduction 1:4 ?
but beyond that... what do we have to tell you?
Do you know how this forum generally works for this kind of problem?

 

[MBT]

Good!
Are you showing us how?

 

[volaff]

evviva those who have understood that, once found a solution, it is better to keep it for themselves!! !

 

[meccanicamg]

Hello everyone, I should design an epicycloidal reducer (with helical tooth wheels) type '' to 3 cylindrical wheels', which must realize a transmission ratio of 0.25. the supplied data are the nominal diameter of the crown =52mm and for the helical toothing an angle of inclination of the helix α=30° and θn=20°.I have to establish the number of satellites (congruent with other geometric constraints) number of teeth, towards winding the helix for each wheel.I hope that someone can help me, thanks in advance.

I would say there are several strange things:
- transmission ratio (defined as zout/centered...so it will be 4 and not 0.25)
- for the calculation of the number of satellites I would say that it is necessary to make calculation with lewis (for the static bending of the tooth) and hertz (for the surface wear of the tooth) and therefore if it is not enough 1 satellite with its relative factor of cover (variable but not so much since the transmission ratio is fixed) because the verification is negative it is necessary to increase the number of satellites. In this way the torque to be transmitted is divided into the number of satellites in an equal way ( theoretically if the game between gears is zero) and it is thus possible to decrease the mechanical and geometric characteristics of the satellites themselves.
- verifications are regulated according to one 8862 or second iso 6336 as well as having general feedback and treatment in traditional literature under the voice of lewis and hertz.