Trike Report---Update
- Thread starter srdavo
- Start date
H
Haggard
Guest
very nice davo.
ty
got it figured now : )
ty
got it figured now : )
W
whelan wheels
Guest
srdavo nice trike,I also own one and mine is a road king and was found in my friends back yard and was sitting there for about 35 years.So my friend and I restored it back to riding condition,also I've just recently replaced my front wheel from 24" to a 26" so the ride is different,the only problem Ihave with it is the rear part of the frame cracked and needs working on. sorry that I don't have no pic's to show,but eventually I'll get some posted.
BikesaLot
New Member
Where's all yer trike pics?
I'm still waiting on the trike pic you have. web site?
I'm still waiting on the trike pic you have. web site?
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srdavo
Well-Known Member
here's Haggard's trike... He's not here very often
http://www.motoredbikes.com/showpost.php?p=77479&postcount=26
http://www.motoredbikes.com/showpost.php?p=77479&postcount=26
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SimpleSimon
Active Member
Differential rear end for a trike? It isn't simple, but not terribly complicated either. Take a normal rear hub, and spoke flange mount two identical sprockets that have had the centers removed to allow clearance (you can do this with an internally geared hub, or very carefully with a derailleur set up). On the internal end of each rear half axle mount a freewheel (you'll need both a right side and a left side freewheel), then put identical sprockets on each. Chain loops connect the rear hub and the two half-axles. When power is transmitted through the hub to the half-axles, the freewheels engage and turn the wheels. When you coast, or are powering through a turn where your outside wheel needs to turn faster than the inside wheel, the freewheel allows that to occur - effectively acting as a differential.
It actually works pretty well, according to what I've read, and the local bike shop guy who says he has done this a few times on various trikes.
It actually works pretty well, according to what I've read, and the local bike shop guy who says he has done this a few times on various trikes.
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srdavo
Well-Known Member
Hey SimpleSimon,
Simon,
Would you do a sketch-up of this design.... maybe an overhead view?
Please & Thanks,
Dave
Simon,
Would you do a sketch-up of this design.... maybe an overhead view?
Please & Thanks,
Dave
SimpleSimon
Active Member
Sure, Dave.
It will take a day or two. I had implemented that system on my delta trike that got squashed this summer, and it worked quite well. As I installed it, it was mechanically kind of complex (5 separate chain loops involved), and a jackshaft to bring the power and the pedal power loops together just ahead of the Shimano three speed hub I used as my mid-drive unit. Overall, though, it worked pretty well.
I made the sprockets to attach to the spoke flanges of the Shimano hub with a Dremel tool and patience, then mounted them with with separate tabs riveted into the spoke holes in the flange - six per flange, two rivets each. The sprockets themselves bolted onto the tabs.
My camera is dead, has been a long while, so I have no pics. I can do a sketchup 3D model, and will.
It will take a day or two. I had implemented that system on my delta trike that got squashed this summer, and it worked quite well. As I installed it, it was mechanically kind of complex (5 separate chain loops involved), and a jackshaft to bring the power and the pedal power loops together just ahead of the Shimano three speed hub I used as my mid-drive unit. Overall, though, it worked pretty well.
I made the sprockets to attach to the spoke flanges of the Shimano hub with a Dremel tool and patience, then mounted them with with separate tabs riveted into the spoke holes in the flange - six per flange, two rivets each. The sprockets themselves bolted onto the tabs.
My camera is dead, has been a long while, so I have no pics. I can do a sketchup 3D model, and will.
srdavo
Well-Known Member
Thank You Sir. No Hurry.
I just need a visual of the concept, so I can get my head wrapped around it.
I just need a visual of the concept, so I can get my head wrapped around it.
SimpleSimon
Active Member
Poor Man's Differential
As pictured, the blue transparent planes represent chain loops. I didn't bother to draw actual sprockets, as that level of detail is unnecessary to explain the concept.
On my trike I put a jackshaft near the rear of the bicycle frames rear triangle, in order to bring the pedal and the power sides together in the feed loop back to the Shimano hub I used as a mid-drive. I used two 24 tooth sprockets that I had removed the centers from to mount to the spoke flanges of that 3 speed hub, and two freewheel bearing mounted 24 tooth sprockets as the final driven sprockets - one on each half axle.
When riding straight ahead both half axles turned at the same rpm, and both were fully powered. When cornering, the inside wheel doesn't turn as fast as the outside one, and the freewheel allows the sprocket on the inside half axle to slip - effectively, all power is going to the outside wheel.
Thus, differential effect.
As pictured, the blue transparent planes represent chain loops. I didn't bother to draw actual sprockets, as that level of detail is unnecessary to explain the concept.
On my trike I put a jackshaft near the rear of the bicycle frames rear triangle, in order to bring the pedal and the power sides together in the feed loop back to the Shimano hub I used as a mid-drive. I used two 24 tooth sprockets that I had removed the centers from to mount to the spoke flanges of that 3 speed hub, and two freewheel bearing mounted 24 tooth sprockets as the final driven sprockets - one on each half axle.
When riding straight ahead both half axles turned at the same rpm, and both were fully powered. When cornering, the inside wheel doesn't turn as fast as the outside one, and the freewheel allows the sprocket on the inside half axle to slip - effectively, all power is going to the outside wheel.
Thus, differential effect.
