A structural element of a cycle includes at least one tubular sheath provided with an outer wall delimiting, with an inner partition, at least one cavity in which a vibration damping system is accommodated. The sheath includes at least two internal cavities, each delimited between the inner partition and the outer wall, one of the internal cavities forming a housing in which the damping system is accommodated and attached.

A scooter includes a diversity of sensors to adapt scooter characteristics to any one or more than one of safety aspects, and scooter, environmental or driver states. Scooter characteristics susceptible to adaptation include throttle response; motor torque; motor speed; speed; maximum current drawn from energy storage system; braking characteristics, such as distribution, maximum braking power, anti-blocking system parameters or braking; adjusting vehicle dynamics, and suspension parameters such as stiffness, or damping coefficient.

A method for forming a bicycle frame component made of thermoplastic composite laminates has: a shell forming step: manufacturing multiple shells by compression molding; an overlapping step: overlapping two corresponding connecting margins of each two of the multiple shells to form an overlapping section of the two of the multiple shells and deploying a supporting unit within the multiple shells for supporting; a hot compressing connection step: heating and compressing the multiple shells to diffuse polymers of the multiple shells and to turn the multiple overlapping sections into multiple fusion areas for connection; a supporting unit removal step: removing the supporting unit disposed within the bicycle frame component.

A method for the manufacture of a fiber-composite article for a bicycle frame or other bicycle component uses an outer mold configured to define an outer surface of the fiber-composite article and an inner mold configured to define an inner surface of the fiber-composite article. The method comprises: securing in the inner mold a supportive armature for a space-filling mandrel, the mandrel being configured to occupy a space within the inner surface of the fiber-composite article during lay up and curing of the fiber-composite article; forming the mandrel by injection molding a solidifiable fluid into the inner mold, around the armature, the solidifiable fluid being configured to form a solidified, molded material; applying a fiber composition to the mandrel; securing the mandrel with the fiber composition in the outer mold; heating the fiber composition in the outer mold to form the fiber-composite article and concurrently heating the solidified, molded material. In this manner, the fiber composition is compressed into the outer mold due to expansion of the solidified, molded material.

A method for the manufacture of a fiber-composite article for a bicycle frame or other bicycle component uses an outer mold configured to define an outer surface of the fiber-composite article and an inner mold configured to define an inner surface of the fiber-composite article. The method comprises: securing in the inner mold a supportive armature for a space-filling mandrel, the mandrel being configured to occupy a space within the inner surface of the fiber-composite article during lay up and curing of the fiber-composite article; forming the mandrel by injection molding a solidifiable fluid into the inner mold, around the armature, the solidifiable fluid being configured to form a solidified, molded material; applying a fiber composition to the mandrel; securing the mandrel with the fiber composition in the outer mold; heating the fiber composition in the outer mold to form the fiber-composite article and concurrently heating the solidified, molded material. In this manner, the fiber composition is compressed into the outer mold due to expansion of the solidified, molded material.

Composite structures and methods of forming composite structures are provided. The composite structures can include one or more composite structure components. Each composite structure component is formed from a composite panel that includes one or more sheets of material. The sheets of material include a thermoplastic material and a plurality of reinforcing fibers. A composite panel can be formed in three dimensions to form a composite structure component. Multiple composite structure components can be fused to one another to form a composite structure. In addition, each composite structure component and the composite structure formed therefrom can include an aperture. An interior volume can be formed between adjacent composite structure components. Methods for forming a composite structure can include a step of simultaneously molding and fusing composite structure components.

An article made by composite material includes a body made of reinforced fiber. The body has at least two opposing sidewalls. A foam component is embeddedly disposed in each sidewall. Owing to the two foam components, the finished composite structure is lightweight and has high mechanical strength.

The present invention relates to a seat rail structure for a motorcycle having a seat rail on a vehicle body. In this structure, the seat rail has a side member being a bent product of continuous fiber reinforced resin, the side member has: a side wall at an outer end in a width direction of a vehicle body; and an upper flange at an upper end of the side wall to protrude from the side wall inward in the width direction, the side wall has an upper fastening portion at an upper end section of a front end region, fastened to a main frame, the upper fastening portion has an upper corner edge portion straddling front edge and upper edge portions, the upper corner edge portion is arcuate, and a rear end of the upper corner edge portion is frontward relative to a front edge portion of the upper flange.

A crank arm for a bicycle may include a body extending along a body axis and having a first body end and a second body end axially spaced apart from the first body end. The insert may also include an insert provided toward the first body end. The insert may include a base portion having a radially outer surface. At least one extension may extend outwardly from the radially outer surface and may be encased within a corresponding recess in the body whereby relative planar movement between the body and the at least one extension in a first plane. The retaining portion may have a retaining portion width measured in the first direction and the retaining width may be greater than the throat width thereby inhibiting relative radial movement between the at least one extension and the recess and preventing radial extraction of the extension from the corresponding recess.

A crank arm for a bicycle may include a body extending along a body axis and having a first body end and a second body end axially spaced apart from the first body end. The insert may also include an insert provided toward the first body end. The insert may include a base portion having a radially outer surface. At least one extension may extend outwardly from the radially outer surface and may be encased within a corresponding recess in the body whereby relative planar movement between the body and the at least one extension in a first plane. The retaining portion may have a retaining portion width measured in the first direction and the retaining width may be greater than the throat width thereby inhibiting relative radial movement between the at least one extension and the recess and preventing radial extraction of the extension from the corresponding recess.