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Lifter gearboxes.
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Knightrous
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Joined: 15 Jun 2004
Posts: 8469
Location: NSW


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quote:
Originally posted by Nick:
quote:
Originally posted by Knightrous:


I have designed two gearboxes for the 2016 version of Farmboy which utilises the hypocycloid design. The first is a 12:1 single stage gearbox to suit a low to medium kv brushless motor within a 50x50x41 package.


Were these designed for drive or as a winch replacement and how much torque do you think they are good for? Is there any chance of scaling them up or increasing the single stage gearing a bit?


Both, the 12:1's were designed to be a more compact replacement for my DeWuts (17:1 with a 1250kv Dewalt, replaced by 12:1 and an 880kv motor). The 100:1 I designed was to replace the bulky winch setup / geared scooter motor setups I have used in the past. I'm not sure how much torque they can handle, I've just designed them on feel and aimed for mildly over kill. I can certainly scale them up into a bigger design and increase the ratios, but so far I've only designed them for a single bot which requires everything to be smaller (The next Farmboy should be ~20% smaller).
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RoboWars Sydney 2013 Sportsman Champion - Farmboy

Post Mon Nov 02, 2015 7:11 am 
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Knightrous
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Joined: 15 Jun 2004
Posts: 8469
Location: NSW


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Had a quick 'test' part knocked up by a fab house in China for some quality checks and gauge of pricing.







Haven't had time to run the micrometers over it to check the inner parts where a 0.01mm tolerance was specified, but it looks acceptable by eye. Might have to rename this sportsmen to "Made in China".
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RoboWars Sydney 2013 Sportsman Champion - Farmboy

Post Wed Nov 18, 2015 7:49 am 
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Nick
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Joined: 16 Jun 2004
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That look several orders of magnitude better than the "Mr Wang" gearboxes. Call the bot Sun Tsu, much more relevant than Made in China Smile.
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Post Wed Nov 18, 2015 8:22 am 
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marto
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For the price and a one off that doesn't look half bad. Shipping would be 50% of the cost for sure and a one off in AUS prolly cheaper but something to keep in mind in future.

Steve
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Steven Martin
Twisted Constructions
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Post Wed Nov 18, 2015 11:58 pm 
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