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Dual Riding and Driving
Tricycle
Chin, Chun
Fan Chiang, Tsung-Lin
Chin, Hsu-Sheng
Su, Pern-Hong
E-mail: [email protected]
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 Bicycle is a very popular transportation tool and
sports equipment. However, to the physically
handicapped persons, including the hearing or
visually impaired, they can just envy the normal
people for their carefree rides on bicycles, and
cannot enjoy riding it at all. And the safety of
bicycle ride by children or old people also makes
people feel worry about it. 「 Dual Riding and
Driving Tricycle」is a bicycle available for two
people to ride together side by side. The bicycle
body is composed of a primary bicycle and an
auxiliary wheel, which are connected by a flexible
quadrangular articulation mechanism.
 When a regular bicycle turns, by inclination of the
driver’s body and the bicycle body, the reversed
moment can be created to reduce the centrifugal
moment which may cause the bicycle to overturn
outwards. As to 「Dual Riding and Driving Tricycle」
, it has the same motion form of a regular bicycle,
and enables the parallel movement of two human
bodies, primary bicycle and auxiliary wheel.
Therefore, when it turns or moves on rough and
uneven surface, it can still keep moving stably and
at a limited inclination angle, but will not overturn.
In addition to its strong structure, the bicycle body
can be dismantled and assembled rapidly.
Bicycle permitting
operation by two people.
Before Now
Dual Riding and Driving Tricycle
Top-View Drawing
Auxiliary Bicycle
Auxiliary Bicycle and Articulation Mechanism
A Finished Product
 「Dual Riding and Driving Tricycle」 has a set of
coupling bars. Four rows of perpendicularlyarranged springs lined between the bars.
Therefore, the bicycle can lean with the
principal bicycle and auxiliary wheel paralleled
within a limited range to prevent overturn.
Springs are interlaced between ends of joint
configuration, which can resist deformation and
therefore maintain the stability of both principal
bicycle and auxiliary wheel bodies. Utilizing
quantity discrepancy of these four rows of
springs and the location of hook holes to change
pulling force and therefore make the auxiliary
wheel post remain level when it’s motionless
instead of leaning forward or backward.
 The auxiliary wheel body comprises two fixing
bases, an active gear, a passive gear and an
idler box, the auxiliary wheel further comprises a
rung, the fixing bases are connected to both
sides of the shaft of the auxiliary wheel, the
active gear is a fixed gear, the passive gear is a
movable gear, a small idler of the idler assembly
engages with the active gear, a big idler of the
idler assembly engages with the passive gear,
the big idler drives the passive gear, and the
passive gear drives the rung to rotate the
auxiliary wheel.
Joint Configurations
Shaft Configuration
Driving System
 The invented special bicycle for multiple persons
to ride at the same time can be divided into two
types. One of them is the tandem bicycle with
seats in front-and-rear structure. The other type
has seats in parallel structure. However, it cannot
perform inclination action, implying that it cannot
make speedy turns. When it runs on rough and
uneven surface, it may even overturn. 「 Dual
Riding and Driving Tricycle」 has the merits of
both types, which refer to the dexterity in the
control of seats in front-and-rear structure as well
as the friendship building and entertaining effects
of seats in parallel structure, but has no defect of
the two types.
 Springs are interlaced between ends of joint
configuration, which can resist deformation and
therefore maintain the stability of both principal
and auxiliary bicycle bodies. Utilizing quantity
discrepancy of these four rows of springs and the
location of hook holes to change pulling force and
therefore make the auxiliary seat post remain
level when it’s motionless instead of leaning
forward or backward.
When this tricycle is turning,
for instance, turning right,
it shall be like that shown in
the left exhibition.
The principal and auxiliary
bicycle bodies encounter
height discrepancy or are
operated on uneven ground.
Advantages
․ High driving safety
․ Quickly to install
․ Can be mounted on nearly all bikes
․ Beside you instead of behind you
Thank You!
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