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General Category => General Discussion => Topic started by: gearman on June 06, 2020, 04:49:21 PM

Title: reverse gear for my trike
Post by: gearman on June 06, 2020, 04:49:21 PM

As some here know my first attempt using a sprag clutch was a failure.As some here said I should making a retractable motor assy. Well it is now done .The slide assy was a pain. However when testing it backing  up the  wheel would only climb a piece of 3/4 in. plywood.Anything thicker and the drive roller will slip on the tire.I have done tons of net searches and  saw gear tooth looking rollers,knurled ones,even a herringbone profile one.All of these had a much finer pitch than mine,but they were made for lawn mowers or bicycle conversions.,not a big bag mc.I was thinking of re machining my roller and remove 50% of the present crown width,the theory being the roller would imbed  deeper into the tire.Ideas   thanks
(https://i.ibb.co/pXt7WCH/IMG-0035.jpg) (https://ibb.co/pXt7WCH)

(https://i.ibb.co/XFmDSwN/IMG-0039.jpg) (https://ibb.co/XFmDSwN)

(https://i.ibb.co/pXzgckJ/IMG-0032.jpg) (https://ibb.co/pXzgckJ)

(https://i.ibb.co/4tKYxmX/IMG-0036.jpg) (https://ibb.co/4tKYxmX)

Title: Re: reverse gear for my trike
Post by: Markcarovilli on June 06, 2020, 07:40:40 PM

Slippage - how about roller with rubber around it?   That’s all I got...

Mark

Title: Re: reverse gear for my trike
Post by: rtbickel on June 06, 2020, 07:52:37 PM

It needs more friction surface.

Title: Re: reverse gear for my trike
Post by: stubbie on June 06, 2020, 08:26:54 PM

Would it be from where you are trying to push the tyre from? IE the middle, top, bottom.