mobi#dolly.trike
mobilehome` bike
integration
5.10.1:
mobi#dahon-dolly trike
. rather than
relying on some local hardware store to carry a trailer,
which is hardly compact enough anyway,
have the design use a dolly u-bolted to the floor panel
with coaster wheels on the corners for recovering from tip-over's .
5.10.19:
. tip-over's are primarily prevented by using very low speeds
generally,
and esp'ly on a turn (it's a pedal powered mobile home that will weigh
atleast 150lb
when loaded with the bike and the electricity-generating equipment
5.10.15:
reuse parts from the home-made scooter and the rollerblades
-- . a really compact design should fit through a door, so it can't be
the width of 2 dollies .
5.10.28
after testing the 20'' folding bike with a chair
to see how to ride the bike while reclined,
I noticed that you have to sit rather high to reach the pedals,
and even then, the pedals have to higher in order to push with the
balls of the foot rather than the heel
. maybe there is a way to use the rear assembly some other way
todo: check the structure on the dolly again:
it's not clear to me how the dolly and bike can be merged without the
dolly getting in the way of the cycling legs . maybe the fit could made
by cutting out some of the dolly to make it more parallel with the
ground .
. the first priority is having a unit that can fit through the door and
so the whole box can only be foot taller than self .
re.inspection:
. it appears the 20'' can easily be reused in a recliner system:
unlike other bikes, where the rear wheel comes into the axle slots from
the front,
this one comes in from the back,
so that when you raise the pedals up,
the rear axle is more stable than ever!
. the following idea may not be practical in my context because I'm
trying to reuse a bike and a dolly with a minimum of modification:
when the folding bike positioned vertically,
and the front half is removed,
then a trailer with a spike connector
can keep the bike upright
. if the spike can swivel like a steering column,
then the rider can replace the seat post with a joy stick;
ie, pushing the joystick to the right causes the wheel to turn left
.
steering column in the seat tube
. another re.inspection shows the bike raised by putting the steering
column in the seat tube:
it appears this may work by using the fork left from the cannibalized
fuji
find the bike repair book after not being able to try dis.as'm.ing the
head set;
the handle post won't budge? find the bike repair book:
try using vice as leverage? frozen or too noisy late at night to put
full energy into it:
might be rusted etc? lube with silicone spray
.
web
. looked for past links on hpv's . lead to explorations of hpv, trikes,
quads, microcars, rails-to-trails -- one of which includes the spokane
centennial trail
.
result (2005.10.28):
. the likeliest design, given my constraints of minimal redesign,
is using a bike in the normal riding style,
but with the aid of a dolly,
the bike is enclosed by shelter while driving
. after the drive, the rear of the shelter has a recliner to study and
sleep;
the bike can just stay in place, and legs go on either side of
it
-- it's 2-people wide so you still get a chance to turn over during
sleep
the skates can go on the front corners to help recover from tip-overs
. besides the double door that opens over the bike seat for the driver
to see from,
there is a door at the rear where it is enter standing on 2
side-by-side wheels, and easy to exit from during rollover
(if it is
due to a prank, then they could tip it on it`s end, but then you may
prefer staying inside the vehicle?) .
5.12.3: twin dollies
. a pair of dollies are placed on either side of the bike:
they have their axles on the same line with the bike`s rear axle,
they have their handles suspended by a
yoke that is held up by the bike`s
frame (at some place close to the front)
. as with other trailers, a platform will be layed over,
that places the wheels at the center of gravity;
eg, lay a beam across each dolly,
such that a yard of beam extends from either side of the dolly`wheels
. need to worry about how much weight is applied to a tire containing
brakes;
the winter hills can be treacherous,
and having a large load without brakes could be a good reason why even
hpv's need to be regulated by the dot.gov .
[ logger:
it appears the design could be safe by putting a great weight on the
side of the trailer that is attached to the bike ] .
5.12.3: twin dollies
modular
. by using a modular design, the twin dolly system can be
reconfigured as a single dolly trailer for light loads
. the front stabilizer wheels could be reused in the back of the
single-dolly trailer .
5.12.19
. an even better idea than a trailer trike -- if it flies with
officials --
is to use a pair of dollies alongside a bike:
. this would make it easy to
not only apply atleast half the weight of the trailer on the bike,
but also have the trailer`weight distributed evenly
between front and back wheels
so that both brakes could be used in stopping
. two competing ideas:
(1 fused):
. a fused design requires that the tires of the trailer
be aligned with the back tires of the bike
. the advantage is that a fused connection is easier to engineer than a
trailer hitch .
(2 trailing):
. a trailer design lets you place the trailer tires behind the
bike`rear tire,
which gives you more possible room in the vehicle
. it may be easier to switch the bike out for repairs
. this design can be more challenging because the trailer`s entire
weight
is born by the single hitch point;
whereas a fixed connection can make an attachment at
every adjacent point that doesn't interfere with rider`movement .
6.1.14: dahon#
unicycle
. another tour of workbikes @
book"en[cycle]opedia
gave me the idea of riding the bike backwards
(reverse both the back tire and the pedals),
in order to transform bike and trailer into a trike,
or do something like the front-wheel-drive trikes
. but that is not making sense if the forks are being fixed to the
trailer,
because that puts far too much stress on the frame during quick stops,
in ways that the frame was not designed for;
however,
-- monumental achievement --
best idea since the beginning of the project ?!
is to convert the folding bike with the backend ridden normally,
but the frontend is reused as a 5th wheel like so:
the forks are slightly widened, and go on the rear axle
-- which is slightly lengthened so that it fits the following sequence,
from inward out:
(back fork, spacer, front fork, nut)
. the major unknown is how to get the trailer`boom to mate with the top
tube,
or how the handle bars are to mate with seat or seat tube so that
(
the frame is tilted upward,
the pedals are lifted from the ground,
and, the seat is positioned well in back of the pedals
instead of directly over them
) .
6.1.15: folding
bike integration
. disassembled the dahon,
and try to reassemble it with the new
idea:
. remove the front part and added it to the back,
so that it formed a pivot and
allowed it to be the front part of a recumbent trike
. the bike was rotated with pedals higher,
and the front forks were attached where the rack verticals had been
. the folding steering column was hack-sawed to fit into the seat tube
to form a triangled connection that should easily be strong enough if
(1) a shim can be found to make a tight seat tube connection; and,
(2) there is a strong way to connect the front forks
. my next plan was to widen the holes where the front forks would be
attached
so that they could be supported by the
same size of bolt they are intended to sit on;
but, I couldn't find the key to my drill!
[ just as well,
since I would have had to improvise with a too-small drill bit,
and I really need to buy a new drill anyway,
because the one I have now has no reverse mode ]
2006.01.25:
. make holes in the frame . feel sort of panic'd about things not
working out,
but then I saw that all I needed to do
was u-bolt angle iron to form a seat girder
. then having the new top tube connected to a trike,
there would be no need to worry about steering
. there is still some worry about needing to have control of the
front`s angle,
implying that the top tube cannot simply be strapped to the the hand
truck`s bed,
but instead attached to some structure that can build angle to the bed
. the seat tube was too large for the handle bar vertical,
but seemed tight when I pulled the band apart and inserted shims taken
from
some broken in-the-handlebar gear-changing levers
( there were 2 shims under each end of the band, and then a third
sitting on top to keep them from flipping up,
so that they continue to provide a sort of roundness
. the forks were added to the rear frame by drilling holes,
and reusing 2 x 1/4'' bolts from the gym kit
. the horns on the back needed for steering might come from the handle
that already exists on the hand truck .
6.6.14:
trailer-bike connection
. reviewing trailer instr's,
I got an idea that I must have had before,
but I guess that last time I wasn't sure if I'd get
possession of junk bed`s frame;
according to the mgt that just left,
I should leave it in the hall way and see if anyone wants the whole
thing;
and strangely they took only the parts I couldn't use;
so now I have these 2 long beams
. the trailer comes with one tongue,
but with these frame girders I can have 2 tongues,
one on either side of the bike
... the first idea was that I can
connect it near the pedals but making it swivel there make it more
unstable than being a little behind the stationary wheel
. the 2 forks still have to come together at one point that pivots;
but now the design has more options about
how that point connects to the trailer
... another option is available due to the
low speed of the trailer within the hpv context
is nixing the suspension bows,
and securing the the axle directly to the frame, so that
it would be possible to saw the axle enough to
put the bike`s stationary wheel in line with the trailer wheels,
which would then allow the solid and more secure design of a trike
instead of a bike pivoting a trailer
. the odd part about this is it creates a bit less living space,
because, although there are low-profile bikes
that could allow the floor to be built over them,
there is still the problem that either the wheel base is very short,
or the design is complicated by the need for separate pieces;
however, the folding bike already comes that way!
. it could be modular so that
the car part formed a flatbed
on which the house part would be quick-bolted .
mobi#lite
6.8.1: mobi#lite -- found a recumbent!
if the dolly is attached to the bike`rack, as if a trailer;
and then the rider
sits on the dolly,
then you have a reclining trike
. although the rider`s butt is behind
the rear axle`vertical,
the dolly is hooked up beyond that vert
. this makes it easy to balance
and to much reduce the mental energy needed
when going up large hills
because you can go slower without feeling like you're about to fall over
. a trike design allows full enclosure (protection from the god-aweful
dog problem around here)
in something that can be dragged through the elevator every day
. parts that looked most helpful for creating linkages:
all the spare pedals around here,
and the hardware that went into the wood&angle-iron scooter
. the major problem with an easy recumbent conversion
is that even when sitting as high as the recliner conversion on 10speed,
you have this space needed for pedaling
that competes with the space needed by towing arms connecting dolly to
bike
. the connect point, where the dolly bears down on the bike,
must be ahead of the rear axle vert
. the only way to sit lower,
is to use the angle iron to form a slim arm that stays over the wheel
. and even then, it doesnt work when turning a sharp corner,
unless you impl the hand-crank design
so that only the hand crank is used during the sharp cornering
. the other drastic alternative,
is to cut their long-ass top tube, and re-angle it, so the front tire
is much closer,
and no longer folds, but is welded at an angle that rotates the pedals
higher off the ground
. you then need to make some pedals an ankle strap mech .
. assuming that's not an option,
there needs to be a handle bar extender,
which can cheaply be 2 sets of rotating bars,
with their horns connected by parachute cord
(it just needs protection from insidious wear-out, not strength)
one rotating bar that you operate can pivot on spare pedal,
the large horns are operated by you,
and the small ones are held up front
measures
. height of recliner bike?
(axle to seat) = height of stacking chair = (inside knee to heel)
. space needed for pedaling at that height?
heel get near rear axle line,
but legs drag through more critical space over rear tire:
put a pedal full forward to draw max pedal vert,
then at the <p.m.vert, ground plane>-point
draw line to this point:
< recliner seat height, rear wheel`rear vert>
then assume that line is the side view of a plane;
and the legs want the best parts of everything beyond that plane
ie, the parts above the tire where the trailer tongue needs to travel
. the recliner bike seat is fairly high,
so things work out:
the leg plane intersects the rear axle vert,
at just about the top of the tire
. also, during a tight corner,
you can also simply stand on the pedals
. staying low is nice because
-- after protection from dogs
-- the most important things is privacy and warmth,
and
if can let the wind with walls that stop only dogs,
but you will soon be plotting against the wind,
and if you're sitting high, you'll get blown down
because a dolly is not wide enough
. see recent notes about converting 10speed into a dual pedal system
for the hands;
it had workable system except for steering
. you could spend a lot on that one,
or you could remember how we biked no-hands as kids,
you just have to keep the speed up, and not have bent forks, etc
. in a jam get a massive array of mirrors,
so that all head moves result in steering
. finally, how often do you need both arms and legs? only if gears are
shot!
-- remember who would drive with their knees? .
6.8.9:
. another way [12.5: of getting the legs out of the trailer`boom`[pivot
space] ]
is getting the front wheel raised,
perhaps by replacing it`s wheel with the 10speed`s front: unlikely
6.8.9:
upside down frame
. yet another way is flipping the frame upside down:
[12.5: may need to reinforce top-tube ]
[12.5: --turning the fork upside-down is possible; hence following is
obs: ] .
but turning the fork upside down is a trip to deep africa -- no idea .
6.8.9:
the sturdy rack
. one way to make the pedals higher is to do the same idea as for hand
pedals
but keep specialized mainly for foot-pedaling rather than hand pedaling
. reuse the 10speed like so:
( saw the seat tube [clearing distance] from the pedal axle
, saw rear wheel frame vert's [clearing distance] (likely 9'') from
wheel axle
) . this creates a piece that fits upside down,
the 10speed`s seat tube sliding into the folding bike`seat tube
with shims and crossbolts
. the rear verts are treated attached just like bike`rack verts:
drill a hole, and use that to bolt the 2 bike`s rear verts together .
the old fuji frame is perfect model: shows
that without bending the frame at all,
it would not fit well
. to get rdy for new way,
reverse the cables of front n back brakes,
. must cut off bottom pedals?
yes, if the top pedals are to be a convenient height;
on the other hand, a bit higher would would make it easier to bring the
trailer hitch closer to the front,
and it might make it more streamlined but in this application,
speed is not a concern .
. the shape of the frame`rear`top
and the position of the cantilever brakes
would make it very risky trying to get the derailed chain connected
directly with the top pedals;
so if you want any front gear shifting
it needs to be done by the bottom pedals;
and even if you don't want front shifting,
having a dual pedal system is good for creating very high gears
because the top-bottom is (when counting num teeth)
going low-high, and then bottom to rear is capable of doing the same
or undoing the lowing effect of the first transmission
. such an ultra low gear is great full pulling a 500 lb load .
. in summary,
the plan is :
transmission#1: fixed upper`inner to lower`outer
transmission#2: 2speed: lower`2 inner-most gears to rear 6-speed
derailer .
6.8.12:
. consider various alternatives for the design
. wondered how I chose the rider`horz point,
and whether that could change when the bike is
hitching the trailer rather than the dolly
. can I reuse body work between the 2 morphs?
6.8.12: driver`horz
point
. the driver`horz point was first chosen because
the only practical place to mount the top pedals
is somewhere on the seat tube;
but for the dolly morph -- an important one --
another constraint is keeping center of mass
near the wheel pair of the trike
. with the trailer morph,
it doesn't really matter where the driver sits,
because the trailer is much heavier than the dolly;
the weight consideration in that case being primarily
keeping weight in front of the axle to decrease fishtailing .
6.8.12: hitching
technique
. hitching onto a ball might be the simplest approach for both morphs;
but now I'm worried about what keeps the bike staying upright
. if the bike is providing all the brake power,
and the bike simply falls under the trailer while navigating a turn
then that could be disastrous
. suppose a hitching ball is used without
restraints that keep the bike up-right:
the entire ability then depends on the rider`s
pulling on one side of the handlebars
since there is no longer any way for shifting of rider`s weight
. on the dolly this may be easy,
but with the trailer it would too easily suprise the rider:
if one wheel gets stopped by a pot.hole,
then the other wheel tends to keep going,
which creates a powerful swinging action
that will jerk the handle bars away,
and toss the bike to the ground
. one way to help this,
is a hitch plane like the 18-wheelers use:
in addition to the ball & hitch,
the cab stays alligned with the trailer because the sliding plates
press against eachother
. a minimal version of that is
having a table around the hitch of the trailer,
and the bike then has a very wide rack
with wheels mounted upside down on either side of the rack
which roll against the table
. however,
this still involves the sort of lateral forces
that a bike tire was not designed to take
-- I remember how suprised I was the first time I found out
how easy it is to pretzel a 10speed wheel on dirt trails
. it seems that the obvious thing to do
-- and one that allows incremental dev'ing --
is to build the mobi#lite now as planned,
but then attach the trailer by replacing the current dolly`wheels
with ones that are designed for continuous use on the road,
and then hitch the trailer on the dolly`axle`vert point
. this implies that the mobi#lite should include
everything needed for a mobile office
the bulk of which is the rider, battery, water, urinal, and hip box
. as an emergency, there are fold-up toilets into a bag,
but this is not required for a lite morph,
just as most cars don't have a toilet .
. spare pedals could be used for building a direct universal joint
between the dolly and bike which should make it easier to stay up-right
without worrying about strategic placement of the handlebars
. another part on a bike that is a natural universal joint,
is the hinge combo of the fork and front wheel
. and the wheel table idea could also apply to the dolly
6.8.13:
. the current folding bike will never be reused as a bussing bike
(since I'm using the bus less being self-employed,
and also annoyed with feeling vulnerable to dogbites on a bike)
thus, the extra front tube should be added;
so that the folding option exchanged for a stronger front frame .
and, one way to apply the u-bolt
is to first attach the u-bolt`backplate to the new tube,
by a pair of metal screws .
6.10.2: todo"add-on
disk brakes for bikes?
6.10.10: driver`shell
. the car can be constructed with pairs of shelving,
with the middle helping to have a place to attach to the bike,
or a shelving system of any shape
can be bolted onto the dolly
and you would get out by unhitching the dolly .
. the wire cloth can still be used for making
a 2nd sun shade layer on the trailer .
6.10.16: solar batt-charger as
voltage regulator for pedgen
6.10.16: dog.guard uses cot`frame
