24vseven
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| posted on 12/5/10 at 05:59 PM |
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will this work sorry large picture
firstly sorry for the big picture.
in a nut shell given the correct position of the starter motor will this work. the toothed gear is machined acuretly to be a tight fit and central on
the propshaft. when the item is finished the wheel will be shrouded in 3mm steel for protection. and balanced properly. my main concern is will this
cause vibration when running
[Edited on 12/5/10 by 24vseven]
 
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Mark Allanson
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| posted on 12/5/10 at 06:05 PM |
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My eyes, my monitors!
 
Rescued attachment Photo0215.jpg
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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zilspeed
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| posted on 12/5/10 at 06:13 PM |
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Don't like that at all.
Yes, it may be encased in 3mm steel, but if it does go wrong. 
It's putting loads of potential stresses onto a bit of the driveshaft which really doesn't need to have such issues putting on it.
The only suitable place for a gear like that is at the end of a shaft.
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24vseven
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| posted on 12/5/10 at 06:17 PM |
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problem is room at the back is very tight
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clairetoo
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| posted on 12/5/10 at 06:17 PM |
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/\ Agreed !
If that goes walkabouts at any kind of speed , it would probably kill you 
Edit - too slow , I was agreeing with Zillspeed 
[Edited on 12/5/10 by clairetoo]
Its cuz I is blond , innit
Claire xx
Will weld for food......
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Davey D
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| posted on 12/5/10 at 06:18 PM |
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Do you have a centre bearing on your prop with a rubber bush? If so gears meshing and turning may flex the rubber bush letting the prop move, and the
gears push away from each other. My electric reverse has the sprocket bolted between the prop and diff flanges. Since the diff is solid mounted the
gears will always mesh properly
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24vseven
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| posted on 12/5/10 at 06:27 PM |
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fair point never thought of that
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NigeEss
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| posted on 12/5/10 at 07:05 PM |
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Can you find a starter that rotates the other way and then have the gear cloder
to the end ?
Time is an illusion. Lunchtime doubly so.................Douglas Adams.
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24vseven
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| posted on 12/5/10 at 07:15 PM |
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quote:
Originally posted by NigeEss
Can you find a starter that rotates the other way and then have the gear cloder
to the end ?
final position of the wheel is open as its not welded yet
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tony-devon
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| posted on 12/5/10 at 07:24 PM |
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sorry but thats just wrong
like driving around with a horizontal mill in the car LOL
I would certainly be rethinking that
I have only built them on trikes, but 2 successful electric reverse systems so far
1st was very simple, pivoting electric motor with rubber wheel that acted on a portion of the shaft right by the diff
the second was far better, again an electric motor, from a wheelchair or some sort of electric vehicle
toothed belt and pulley to give the desired gear reduction, but the pulley on the propshaft ran on a large 1 way bearing. even had a speed control on
that version
the common theme being little or no rotating parts during forward motion of the vehicle, and always right up against a supported section of the
propshaft to prevent undue sideloading and stress etc
heavy is good, heavy is reliable, and if it breaks, hit them with it
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flak monkey
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| posted on 12/5/10 at 07:31 PM |
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Nooo, dont do that
Generally in engineering - if something looks wrong it usually is. And that defo doesnt look right.
I dont know how most do the reverse stuff, but its probably worth talking to mk about how they do it?
Sera
http://www.motosera.com
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Badger_McLetcher
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| posted on 12/5/10 at 07:57 PM |
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If you're dead set on that move the gear as close to the UJ as possible, preferably with the starter motor facing the other way (so need to
change direction of rotation).
I'd advise you to find another way if at all possible.
If disfunction is a function, then I must be some kind of genius.
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02GF74
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| posted on 12/5/10 at 08:13 PM |
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the further a mass is way from centre of rotation, the greater the vibration if it is out of balancve.
it would not surprise me if the prop would wobble in the middle - the furthest away from both fixed ends and then placing a weighted wheel like that,
not good, as they say.
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24vseven
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| posted on 12/5/10 at 10:49 PM |
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lol yea i took the if it looks wrong it usally is attitude hence the need for a second opinion so its back to the drawing board we go
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MikeRJ
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| posted on 13/5/10 at 11:22 AM |
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quote:
Originally posted by 02GF74
the further a mass is way from centre of rotation, the greater the vibration if it is out of balancve.
it would not surprise me if the prop would wobble in the middle - the furthest away from both fixed ends and then placing a weighted wheel like that,
not good, as they say.
And of course there will be a nice bead of weld around the prop with the associated embrittlement in the HAZ. I wouldn't even consider it
personally.
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boggle
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| posted on 13/5/10 at 11:50 AM |
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how would the starter stay in mesh arrangement with the prop??? the prop will move up and down..
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