The bike creaks a bit when being ridden, which seems to come from this hinge not being completely closed tight. The screw bolt be adjusted at the bottom with an allen wrench to increase the tension. Increasing the tension too much will make it very difficult to close the lever.
I don't understand what keeps the hinge closed. Is it purely by friction? There isnt a lip on the left for the silver blocks on the other side to hold onto. It doesn't seem like it should work but it does (aside from being very slightly loose). What can I do to make it more secure without needing to close the lever with excessive force?
How does this folding bike mechanism work?
byu/xuchuke inbikewrench
by xuchuke
8 Comments
I have no idea, but I would like to know as well. Let’s increase visibility
Woah that looks sketchy. Is this some kind of chinese Brampton clone? I think there should be a lip, otherwise that edge would need to bite into the metal on the other side, but that would need a lot of force.
Thoughts and prayers 😀 but on a serious note, I would also like to know. With my current level of ignorance looks sketchy.
I wouldn’t ride that. High chance of failing while riding.
Yeah, that feels pretty sketch, unless the forces are always pushing the joint together (which they might).
For example, this Term is more what I was expecting: [https://www.youtube.com/watch?v=7QwjSgY_gKQ](https://www.youtube.com/watch?v=7QwjSgY_gKQ) (0:50)
There are undercuts on the static face and the lugs have ramps which engage with them. The clamping is between those lugs and the surround of the lugged face, the lugs move up and pull it relatively downward, and the ramps of the lugs convert some of this into a force along the main axis of the tube. It looks like a crap solution to the problem ¯\_(ツ)_/¯
Is there a lip if you look at it from a lower angle?
It looks like there are machining marks from something going in to cut a slot right at the back for the silver blocks to interface with. Can you show a pic of the underside of the bit on the left?