Large gear ratio
Large gear ratio
(OP)
Hi all,
I am curently working for a small company as a developement engineer and I have to design a basic gear system to rotate a robot bird.I am not very experienced with gears and i am finding it hard to create a ratio of 1:10 within a relativly small space (approx. 250mm x 100mm x 165mm)with just two spur gears.
Is this feasable or would I be better to use a system of several spur gears to gradually create the neccessary ratio.
Any advice would be great.
Laurence
I am curently working for a small company as a developement engineer and I have to design a basic gear system to rotate a robot bird.I am not very experienced with gears and i am finding it hard to create a ratio of 1:10 within a relativly small space (approx. 250mm x 100mm x 165mm)with just two spur gears.
Is this feasable or would I be better to use a system of several spur gears to gradually create the neccessary ratio.
Any advice would be great.
Laurence





RE: Large gear ratio
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Large gear ratio
The gear ratio is 10:1
Laurence
RE: Large gear ratio
RE: Large gear ratio
Russell Giuliano
RE: Large gear ratio
https://sdp-si.com/eStore/
Don
Kansas City
RE: Large gear ratio
RE: Large gear ratio
The actual size of the gears is determined by the torque transmitted. You haven't discussed this at all.
RE: Large gear ratio
RE: Large gear ratio
I would start with a basic spur gear set. Decide what the largest 10:1 ratio will fit in your package space. Contact your gear suppler tell them the gear set you want to use and all the input and out put variables, ask them to run it through their gear software. Most gear suppliers have some kind of software they can run their gears through that will tell you everything you would ever want to know about that gear set. If that is not acceptable then you might want to try a compound gear set or planetary set.
You should have the basic tools to ballpark the answer, the gear guys should be able to help you out with the more advanced stuff and you should be able to understand it.
You didn't say anything about the operating life or lubrication type those are also important.
RE: Large gear ratio
depending on your loads.
RE: Large gear ratio
http:
and saw a few that fit your description.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Large gear ratio
E.g. you may use four spur (or helical) gears with combination of following number of teeth and with the same module which all will give a ratio as 1/10.
z1 z2 z3 z4
1 15 60 20 50
2 15 60 22 55
3 15 60 24 60
4 15 60 26 65
5 15 60 28 70
6 15 60 30 75
7 15 60 32 80
8 16 64 20 50
9 16 64 22 55
10 16 64 24 60
You can purchase them from sdp-si.com as mentioned.
if furthur help needed you must provide more details, e.g. the source of power with input rpm, an desired output rpm, input and output shaft (Parallel, Skewed, Intersecting shafting), etc.
Recommend this PSF handbook for gearing also:
http://
Cheers
RE: Large gear ratio
RE: Large gear ratio
Great response and really helpfull replies.
Currently out of office for christmas so will be back in the new year with some feedback.
again thanks all.