Bikes and Bike Designs

This seems like a tricky concept from a mechanical design standpoint. A place to start may be looking into hubless wheels. This will give you a little flexibility on how the wheels mount to the frame.

Thank you Zach !

yes ,thought of using hubless wheels..but again if used hubless instead of these ..can this folding mechanism work ?

can "folding the wheels to the center frame &then enlarging that center to fit " work?

and why is it tricky ?

If you intend to ride it in the folded position you must also ensure that the two wheels are aligned so that they don't pull different directions. Also, keep in mind that you must have some pivot for steering, drive mechanism (be it pedals or hub motor), brakes (cables, levers, etc).

Unless this is a mostly automated electronic device with gyroscopic control (like those cheap "hoverboards") you will need to consider your user controls.

Right now the biggest challenge that I see with your design is how to allow it to pivot to be folded and also allow it be steered.

In a typical bicycle design there are a lot of geometric considerations when designing a frame. For example, if you change the head tube angle just a few degrees it will completely change the feel and rideability of the bike. Your trail is another major geometric variable that has a big affect on the rideability.

guess i'm getting confused,

-can this not work as how it works in this one wheel scooter?"steering it folding"

-and can the frame attaching the wheels to the center not be adjusted to enable it to be folded?

*excuse my shallow knowledge in this!

I was thinking mostly in the two wheeled configuration when I was discussing steering. I think your idea would work in the folded configuration. But if you want to ride it in a two wheeled configuration you will need a steering mechanism.

Here are some folding bikes that I found from a quick web search. It may help.

yes sure..can this not be a hub motor?

Yeah it absolutely can be. That would be the drive system not the steering.

I think you have a cool idea! My biggest advice is to think through how the operator will interface with this. Go through setup, riding, steering, braking, etc. You may not need a totally seamless design from a mechanical standpoint as long as you cover the user's needs. I don't know the scope of your project.

Zach ,again A HUGE THANK YOU

I totally appreciate your help!

But still confused :D don't totally get what you meant by "to think through how the operator will interface with this. Go through setup, riding, steering, braking,"

it's supposed to be this semester project"bicycle can be transformed into a scooter"..

and this bicycle could be just for leisure..

my point was to make something that i can ride in different positions/ways"sometimes just regular pedaling,sometimes standing,and some other times even running" all in one..

what d y think?

I just mean that you want to make sure that the scooter/bike is easy and comfortable for the user to access all of its features. Is this designed for a person of any size? Can the person reach the brakes easily and comfortably? How does the operator steer the bike? If the operator is in scooter mode vs bike mode will the brakes function the same? Etc.

This needs to be designed for a person to use. Keep after it. I'm following so when you get some updated designs feel free to share! Keep it up!

This is a really great discussion to read. Hope to see some really cool designs. Might publish something in the Official GrabCAD blog if you upload some models.

I will ! THANK YOU !

I invite you to my designs n concepts.

I spend almost all of time experimenting with designs. Some a bit crazy one's... But my main focus remains on DFM... Design for manufacturing.

The idea you have posted has planted a seed... I will put my grey cells to churn out a design concept.

You may also see my YouTube vdo... on a fully functional folding recumbent bike... I designed and built.

Regards,

I invite you to my designs n concepts.

I spend almost all of time experimenting with designs. Some a bit crazy one's... But my main focus remains on DFM... Design for manufacturing.

The idea you have posted has planted a seed... I will put my grey cells to churn out a design concept.

You may also see my YouTube vdo... on a fully functional folding recumbent bike... I designed and built.

Regards,

I would love to,where can I find these designs?

And what seed did you exactly mean?

You mean how to transform it ? Or just the idea of making it a scooter?

Sir, by seed... I mean... I have started thinking due to your idea posted.

I am eager to work on it to come up with a design.

Great !

Would like to keep me updated !

is a scooter in my opinion ..

foldable is a good sector.

is difficult to find design/price/functionality (or in other order )