摘要:
A bicycle crank axle assembly has first and second crank arms that are attached to opposite ends of a crank axle. The ends of the crank axle are non-rotatably disposed in axle mounting openings of the first and second crank arms. A first end of the crank axle has at least one axially extending first spline that protrudes radially outward from an outer peripheral surface of its middle body portion. The at least one axially extending first spline non-rotatably couples the crank axle to the first crank arm and prevents outward axial movement of the first crank arm away from the second crank arm. The second end portion of the crank axle has at least one recess that extend radially inward with respect to the outer peripheral surface of the middle body portion to form at least one axially extending second spline.
摘要:
A bicycle bottom bracket assembly comprises an adapter and a bearing. The adapter has a cylindrical shape and extends along a center axis of the adapter. The adapter comprises a resin material. The bearing comprises rolling elements and an outer race. The outer race is configured to contact the rolling elements and is configured to be provided in the adapter. The outer race is partly embedded in the adapter to be prevented from moving relative to the adapter in both axial directions along the center axis.
摘要:
A bicycle bottom bracket assembly comprises a first adapter, a first bearing, a second adapter and a second bearing. The first adapter extends along a first center axis of the first adapter. The first bearing comprises first rolling elements and a first outer race. The first outer race is configured to be fitted in the first adapter. The first outer race is slidable relative to the first adapter in both axial directions along the first center axis in a state where the first outer race is fitted in the first adapter. The second adapter extends along a second center axis of the second adapter. The second bearing comprises second rolling elements and a second outer race. The second outer race is configured to be provided in the second adapter such that the second outer race is a separate member from the first outer race.
摘要:
[Object] To provide a full float type crankshaft device for bicycle which allows a sub-assembly formed by integrating crankshafts to be mounted on a body side.[Constitution] The crankshaft device includes a shaft 1 provided at a center of a cylindrical hanger member 9, having cranks attached to both end portions, which is configured to have bearings 3,3 provided at inner sides where the cranks are attached, a housing 2 configured at an outer diameter side of the shaft 1 to support the shaft 1 via the bearings 3, and clamp nuts 5 each with a cup-like shape as a whole, which are attached to both end portions of the housing 2 having O-rings 6 as rubber elastic elements interposed between both end portions.
摘要:
A crank arm for a bicycle crank arm system has an elongated hollow core (30) made of a first fiber-reinforced plastic and having, in the final assembly position of the pedal crank system, a laterally located, exterior front face, a rear face opposed thereto and two side faces (102) that connect the front face and rear face with one another, and having at its axial ends (104, 105) metallic shaft sleeves (20, 22), oriented parallel to one another and to the side faces (102), for accommodating a bottom bracket shaft or a pedal axle. The hollow core (30) is encased by a second fiber-reinforced plastic. A carbon fiber thread (50) is wrapped multiple times axially around the hollow core (30) and is in contact with the axially convex side surfaces. The hollow core (30) is bonded to the carbon fiber thread (50).
摘要:
A bicycle bottom bracket assembly comprises a first adapter, a first bearing, a second adapter and a second bearing. The first adapter extends along a first center axis of the first adapter. The first bearing comprises first rolling elements and a first outer race. The first outer race is configured to be fitted in the first adapter. The first outer race is slidable relative to the first adapter in both axial directions along the first center axis in a state where the first outer race is fitted in the first adapter. The second adapter extends along a second center axis of the second adapter. The second bearing comprises second rolling elements and a second outer race. The second outer race is configured to be provided in the second adapter such that the second outer race is a separate member from the first outer race.
摘要:
A composite bicycle component comprises a first member, a second member, a bonding member, and an inner holding member. The first member is made of metallic material. The second member is made of non-metallic material. The first and second members are configured to form an interior cavity therebetween in a state where the first and second members are attached to each other. The bonding member is configured to attach the first and second members to each other. The inner holding member is configured to be disposed within the interior cavity so as to prevent the first and second members from being separated from each other until completion of attaching the first and second members to each other.
摘要:
A crankset and bottom bracket assembly for a bicycle having a spindle. The crankset and bottom bracket assembly comprising a first crank. The first crank comprising a first ratchet mechanism configured for connection to the spindle at a first end. Wherein when the first ratchet mechanism is rotated in a first direction relative to the spindle, the pawl does not engage the tooth and the first crank freewheels relative to the spindle, and wherein when the first ratchet mechanism is rotated in a second direction relative to the spindle, the pawl engages the tooth and rotation of the first crank drives the rotation of the spindle.
摘要:
A bicycle pedal crank has an elongated body and a first end portion with a first seat for coupling with a bottom bracket of the bicycle, a second end portion with a second seat for coupling with a pedal, and an intermediate portion extending between the first end portion and said second end portion and having an inner portion substantially without structural strength and a first reinforcement structure. The first reinforcement structure has a tubular structure arranged around said inner portion and extending longitudinally not longer than the longitudinal extension of the intermediate portion. The extension of the tubular element is limited to the intermediate portion of the pedal crank. The crank may be manufactured in a simple, quick way in a completely automated manner, using a filling material molded under high pressure.
摘要:
An improved mount for, and method of mounting an, optical structure is provided. The mount has a protruding member extending from a surface of the optical structure, a base element having a mounting structure for mounting the mount to another structure and an upper element extending from the base element having a first opening extending therethrough for receipt therein of at least a portion of the protruding member. The first opening defines first and second arms, each of the arms comprising a head portion and each of the head portions ending at an end. A second opening in the upper element extends through one of the head portions and the end thereof in a direction toward the other head portion, while a third opening exists in the upper element through the end of the other head portion in an orientation substantially opposite to and in communication with the second opening so that a tightening mechanism received through the second opening can be received into the third opening. Tightening of the tightening mechanism into the third opening causes the ends of the head portions to draw toward each other so that the first opening of the upper element tightens around the at least a portion of the protruding member.