Twin-Frame BicycleTwin-Frame Bicycle

Chin, Hsu-ShengChin, Hsu-ShengFan Chiang, Tsung-LinFan Chiang, Tsung-Lin

Chin, Chih-ChingChin, Chih-Ching

E-mail: chunchin@ms4.hinet.netE-mail: chunchin@ms4.hinet.net

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Bicycle is a very popular transportation tool and Bicycle is a very popular transportation tool and sports equipment. However, to the physically sports equipment. However, to the physically handicapped persons, including the hearing or handicapped persons, including the hearing or visually impaired, they can just envy the normal visually impaired, they can just envy the normal people for their carefree rides on bicycles, and people for their carefree rides on bicycles, and cannot enjoy riding it at all. And the safety of cannot enjoy riding it at all. And the safety of bicycle ride by children or old people also makes bicycle ride by children or old people also makes people feel worry about it. people feel worry about it. 「「 Twin-Frame Twin-Frame BicycleBicycle 」」 is a bicycle available for two people to is a bicycle available for two people to ride together side by side. The bicycle body is ride together side by side. The bicycle body is composed of a primary bicycle and an auxiliary composed of a primary bicycle and an auxiliary wheel, which are connected by a flexible wheel, which are connected by a flexible quadrangular articulation mechanism.quadrangular articulation mechanism.

When a regular bicycle turns, by inclination of When a regular bicycle turns, by inclination of the driver’s body and the bicycle body, the the driver’s body and the bicycle body, the reversed moment can be created to reduce the reversed moment can be created to reduce the centrifugal moment which may cause the centrifugal moment which may cause the bicycle to overturn outwards. As to bicycle to overturn outwards. As to 「「 Twin-Twin-Frame BicycleFrame Bicycle 」」 , it has the same motion form , it has the same motion form of a regular bicycle, and enables the parallel of a regular bicycle, and enables the parallel movement of two human bodies, primary movement of two human bodies, primary bicycle and auxiliary wheel. Therefore, when it bicycle and auxiliary wheel. Therefore, when it turns or moves on rough and uneven surface, it turns or moves on rough and uneven surface, it can still keep moving stably and at a limited can still keep moving stably and at a limited inclination angle, but will not overturn. In inclination angle, but will not overturn. In addition to its strong structure, the bicycle body addition to its strong structure, the bicycle body can be dismantled and assembled rapidly.can be dismantled and assembled rapidly.

Before NowBefore Now

BicycleBicycle permitting operati permitting operation by two people.on by two people.

Structure of Auxiliary WheelStructure of Auxiliary WheelStructure of Auxiliary WheelStructure of Auxiliary Wheel

Gear Unit of Auxiliary Gear Unit of Auxiliary WheelWheel

The auxiliary wheel body comprises two The auxiliary wheel body comprises two auxiliary sprocket wheels, a gear assembly auxiliary sprocket wheels, a gear assembly and an auxiliary rear folk, the gear assembly and an auxiliary rear folk, the gear assembly comprises two active gears and two passive comprises two active gears and two passive gears, the auxiliary sprocket wheels are gears, the auxiliary sprocket wheels are connected pivotally to both sides of the shaft connected pivotally to both sides of the shaft of the auxiliary wheel, the active gears are of the auxiliary wheel, the active gears are connected pivotally to the auxiliary rear folk connected pivotally to the auxiliary rear folk on both sides of the auxiliary wheel, the pedal on both sides of the auxiliary wheel, the pedal mechanism of the auxiliary wheel body drives mechanism of the auxiliary wheel body drives the active gears to drive the auxiliary sprocket the active gears to drive the auxiliary sprocket wheels through the passive gears, and the wheels through the passive gears, and the auxiliary wheel is driven to rotate.auxiliary wheel is driven to rotate.

Joint ConfigurationsJoint Configurations

Articulated MachineArticulated Machine

Parts of Articulated Parts of Articulated MachineMachine

Connector of Primary BicycleConnector of Primary Bicycle

「「 Twin-Frame BicycleTwin-Frame Bicycle 」 」 has a set of coupling has a set of coupling bars. Four rows of perpendicularly-arranged bars. Four rows of perpendicularly-arranged springs lined between the bars. Therefore, springs lined between the bars. Therefore, the bicycle can lean with the primary bicycle the bicycle can lean with the primary bicycle and auxiliary wheel paralleled within a limited and auxiliary wheel paralleled within a limited range to prevent overturn. Springs are range to prevent overturn. Springs are interlaced between ends of joint interlaced between ends of joint configuration, which can resist deformation configuration, which can resist deformation and therefore maintain the stability of both and therefore maintain the stability of both primary bicycle and auxiliary wheel bodies. primary bicycle and auxiliary wheel bodies.

A Finished Product (Front A Finished Product (Front View)View)

A Finished Product (Rear A Finished Product (Rear View)View)

The invented special bicycle for multiple The invented special bicycle for multiple persons to ride at the same time can be divided persons to ride at the same time can be divided into two types. One of them is the tandem into two types. One of them is the tandem bicycle with seats in front-and-rear structure. bicycle with seats in front-and-rear structure. The other type has seats in parallel structure. The other type has seats in parallel structure. However, it cannot perform inclination action, However, it cannot perform inclination action, implying that it cannot make speedy turns. implying that it cannot make speedy turns. When it runs on rough and uneven surface, it When it runs on rough and uneven surface, it may even overturn. may even overturn. 「「 Twin-Frame BicycleTwin-Frame Bicycle 」 」 has the merits of both types, which refer to the has the merits of both types, which refer to the dexterity in the control of seats in front-and-dexterity in the control of seats in front-and-rear structure as well as the friendship building rear structure as well as the friendship building and entertaining effects of seats in parallel and entertaining effects of seats in parallel structure, but has no defect of the two types.structure, but has no defect of the two types.

A Finished Product (Type 2)A Finished Product (Type 2)

Primary Bicycle and Two Primary Bicycle and Two Types of Auxiliary WheelsTypes of Auxiliary Wheels

Twin-Frame Bicycle (Type Twin-Frame Bicycle (Type 2)2)

Spokes Protecting PlateGear Wheel

Crank

Axle

Ball Bearing

Shaft Configuration (Type 2)Shaft Configuration (Type 2)

Twin-Frame Bicycle (Type Twin-Frame Bicycle (Type 3)3)Twin-Frame Bicycle (Type Twin-Frame Bicycle (Type 3)3)

A Finished Product (Type 3)A Finished Product (Type 3)

Shaft Configuration (Type Shaft Configuration (Type 3)3)

The auxiliary wheel body comprises two fixing The auxiliary wheel body comprises two fixing bases, an active gear, a passive gear and an bases, an active gear, a passive gear and an idler box, the auxiliary wheel further idler box, the auxiliary wheel further comprises a rung, the fixing bases are comprises a rung, the fixing bases are connected to both sides of the shaft of the connected to both sides of the shaft of the auxiliary wheel, the active gear is a fixed gear, auxiliary wheel, the active gear is a fixed gear, the passive gear is a movable gear, a small the passive gear is a movable gear, a small idler of the idler assembly engages with the idler of the idler assembly engages with the active gear, a big idler of the idler assembly active gear, a big idler of the idler assembly engages with the passive gear, the big idler engages with the passive gear, the big idler drives the passive gear, and the passive gear drives the passive gear, and the passive gear drives the rung to rotate the auxiliary wheel.drives the rung to rotate the auxiliary wheel.

When this bicycle is When this bicycle is turning, for instance, turning, for instance, turning right, it shall be turning right, it shall be like that shown in the left like that shown in the left exhibition.exhibition.

The principal and auxiliary The principal and auxiliary bicycle bodies encounter bicycle bodies encounter height discrepancy or are height discrepancy or are operated on uneven operated on uneven ground. ground.

AdvantagesAdvantages

․ ․ High driving safetyHigh driving safety

․ ․ Quickly to installQuickly to install

․ ․ Can be mounted on nearly all bikesCan be mounted on nearly all bikes

․ ․ Beside you instead of behind youBeside you instead of behind you

Thank You!Thank You!

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