Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: Trumpkin on November 19, 2009, 06:27:59 PM

Title: Shaft Extension for Wheelchair Motors
Post by: Trumpkin on November 19, 2009, 06:27:59 PM

I need to make the shaft on a couple of wheelchair motors longer, they have key seats on the shafts so I'm thinking of getting a couple of woodruff keys and using these: http://www.thebigbearingstore.com/servlet/the-1526/1-fdsh-2%22-Keyed-Shaft-Coupler/Detail (http://www.thebigbearingstore.com/servlet/the-1526/1-fdsh-2%22-Keyed-Shaft-Coupler/Detail) along with some key stock, to attach this http://www.robotmarketplace.com/products/shafts_keyed_main.html (http://www.robotmarketplace.com/products/shafts_keyed_main.html) and then use these: http://www.thebigbearingstore.com/servlet/the-5/1-fdsh-2%22-Pillow-Block-Bearing/Detail (http://www.thebigbearingstore.com/servlet/the-5/1-fdsh-2%22-Pillow-Block-Bearing/Detail) to reinforce the keyed shaft. There will be ~60 lbs on the shafts, so do you think this will work?

Title: Re: Shaft Extension for Wheelchair Motors
Post by: ArcMan on November 20, 2009, 10:01:51 PM

I'm not sure what you mean by "reinforce" the keyed shaft.  If you use 2 bearings on the keyed shaft which completely support the load, you'll be fine.  Just be sure you don't transmit any radial force to the shaft coupling. It cannont take it.

Title: Re: Shaft Extension for Wheelchair Motors
Post by: Trumpkin on November 21, 2009, 08:46:37 AM

By "reinforce" I did mean "support the load". Thanks for the help.