2968Views14Replies

Author Options:

Spring loaded bicycle braking system , Does double duty as a Propulsion aid through gears . Feasible?? Answered

  Basic Idea: When used to help slow(not primary brakes) a strong coil or spring is tightened to aid slowing. When maximum amount of tightness is reached the coil disengages somehow, The coil could be kept in the tight state until released for use for a burst of propulsion through reverse gears
. Totally non-electric and light. It would be ideal for stop-and -go bike commuters , up and down hilly areas ,etc.     
   Same idea could used for smaller cars, motorcycles,etc. Has this been used before ? Feasible ? Any critiquing of the concept is welcomed .

Discussions

The forums are retiring in 2021 and are now closed for new topics and comments.
0
jphillips15
jphillips15

6 years ago

Have you seen this? https://www.youtube.com/watch?v=wxhyJAr-YCM

0
BtheBike
BtheBike

Answer 6 years ago

thank you Jphil ! thats pretty much the idea small scale

0
cdubnbird
cdubnbird

Best Answer 10 years ago

 how about simply regenerative electric braking?  stick a motor on there and when you break have it proportionally increase the load on the motor therefore slowing you down and charging a presumed battery.  going up the hill let the motor use what puny little energy it collected while braking to give you the tiniest aid.  ha cool idea but i don't really think it's meant for bikes

0
BtheBike
BtheBike

Answer 10 years ago

Thanks CD. I actually already have an e-bike with regen braking . Its great and it prompted me to brainstorm an all mechanical design. 

0
Yard Sale Dale
Yard Sale Dale

10 months ago

There is the “Copenhagen wheel” e bike hub which stores energy and helps one take off.

0
Yard Sale Dale
Yard Sale Dale

10 months ago

I saw a bike with a small heavy flywheel driven by a 2nd chain and a track cog on the left side of the rear wheel. It had a clutch operated by a v brake lever. The flywheel was spun up as the bike was ridden, and could be used to take pff quickly at lights. It added 10lb to the bike plus some gussets and the extra chain.

0
Bikeorbust
Bikeorbust

1 year ago

We don't need enough energy to propel our bicycle the long. Just to get up to speed after I stop kind of like someone pushing you when you're just getting started. It seems to me we could use your concept A Story energy in a relatively lightweight spring. My goal would be to create forward momentum. I have been looking at some of the the old wind-up toys we had as children. And even though not to scale concept seems similar. I'm going to put my Hebron to work and to buy on your website. Thank you for your time

0
prepositional
prepositional

8 years ago

The inner tube has elasticity which can be loaded using a flywheel of small weight
the small diameter spinner can also have weighted levers which expand at sufficient speed, (like a governor flywheel). If you put the flywheel to spin horizontally more stability would be achieved by its gyroscopic effect.
So the spinning part can be a smaller size winch or ratchet that is a mechanical device that allows continuous linear or rotary motion, while the bungee corded inner-tubes can stretch in a vertical triangle spiral like a coil spring, releasing its energy into a gear sprocket which acts as a transmitting point of acceleration.

0
BtheBike
BtheBike

Answer 8 years ago

there is a flywheel bike designed already and its great although too heavy for what I'm thinking . This http://www.youtube.com/watch?v=UHPrOloikVE&feature=related design is more similar to what i had in mind .

0
prepositional
prepositional

Answer 8 years ago

My idea is to use the entire radius of the wheel, loading springs in between spokes, compressing with a full wheel size coil spring activated gear.

0
akaleeroy
akaleeroy

9 years ago

Can anyone contribute the calculations for this stop and go scenario? Sorry, I was abducted by aliens and all my high school math & physics have been erased from memory.

70kg rider on 12kg 26inch wheeled bicycle stops at a traffic light on a 10% slope, then shifts into most convenient low gear.

When the light turns green, what kind of force is required of the spring/coil so that the extra boost is worthwhile to the cyclist?

0
orksecurity
orksecurity

10 years ago

It sounds like you're trying to invent mechanical regenerative braking.

I suspect the required hardware would weigh enough to cost you more energy than it could save. But that's just a guess.

0
BtheBike
BtheBike

Answer 10 years ago

Ork , yes, prototypes are often too bulky for their own good.  I'm not so mechanically inclined but I would think the heaviest thing would be a strong spring or coil . The rest would be pins and cables like any brake system plus a reverse gear like any freewheel cassette. Just my guess of course too .

0
Re-design
Re-design

Answer 10 years ago

And I think it would be a mechanical nightmare, but when I'm riding stop and go it would be nice to have a help getting back up to speed.

0
rickharris
rickharris

10 years ago

Public transport systems in hilly country have used a form of regenerative braking where the energy from braking is put into spinning up a fly wheel.

BUT as said the hardware would probably far out weigh the advantage.