amberwolf wrote: I'm definitely interested in seeing how you do it!
Hello Every Body!
After having my e-bike breaking driving chains I thought of putting the gear shifting mechanism where there is lesser torque.
numberonebikeslover wrote: So, here it is. It is almost like a CVT using Chains and Gears. There is one more thing in this setup; one would only need one throttle (for gear changing/shifting) and the variation would be greater. It would enable the rider to climb the toughest hill and in downhill use the maximum increase in the gearing ratio for speed. It would also enable the rider to use the maximum available power very efficiently.
One flaw IÃ¢â‚¬â„¢ve thought of a way to overcome; in a situation when throttle is reversed the changer shifts the chain on rare gear back to the smallest gear but there is nothing to shift the chain on the front freewheel (which fixed to hub and is in inverted position) IÃ¢â‚¬â„¢ll do a modification which I will share later on. I wish I had a day of more than 24 hours so I could do so many things that IÃ¢â‚¬â„¢m unable to do after office. Wish me luck guys.
Your precious feedback will be highly appreciated.
Hi Grinhill,Grinhill wrote:So, the tensioner will now be squeezing the upper and lower legs of the chain together, thus maintaining tension. This puts the idler pulley in a good position to shift the front cluster.
I put a 3 speed hub in a similar arrangement for the same reason, to reduce the torque on the transmission.
We have the same drivetrain layout almost exactly Yea, there are differences, like you have a chain input, whereas, mine is a belt.
You have a cassette-based transmission where I have a 3 speed hub. But the shifting takes place on the same side, and they are
both left-side drives.
Your setup will have a large range of gearing Naeem!!!
What are the cassette sizes?
By my best estimate.....
Lowest Reduction: 12:30, 0.4
Largest Step Up: 30:12, 2.5
That's a range of 625%.! more than a Rohloff @ 525%
Range of Input Cassette
def215 wrote:so would the front and rear deraileur move at the same time together,
At the moment, it looks like only a single piece of heavy wire connecting the front & rear derailleurs. I'm guessing you will strengthen this?
I'm also wondering if your front derailleur could have the opening "flared" a bit, rather than have each link striking a sharp edge?
numberonebikeslover wrote:This is a variable transmission with a very vide range of choice, using simple chains and gears readily available in the market in my city ( Peshawar , Pakistan ). It is not just a final stuff at the moment but IÃ¢â‚¬â„¢m working towards perfection.
amberwolf wrote:Where does the pedal chain hook in? (looks like it is not yet integrated?)
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