摘要:
A ratchet mechanism for a bicycle hub includes a first hub member (20, 20') and a second hub member (7, 75), wherein the first hub member (20, 20') and the second hub member (7, 75) are rotatable relative to each other. A pawl (30, 30') is supported by the first hub member (20, 20'), a ratchet tooth (11, 11') is supported by the second hub member (7, 75), and a biasing mechanism (23, 95) is provided for biasing the pawl (30, 30') toward the ratchet tooth (11, 11'). A pawl control mechanism (60, 100) is responsive to relative rotation of the first hub member (20, 20') and the second hub member (7, 75) for allowing the pawl (30, 30') to contact the ratchet (11, 11') when the first hub member (20, 20') and the second hub member (7, 75) rotate relative to each other in one direction and for preventing the pawl (30, 30') from contacting the ratchet tooth (11, 11') when the first hub member (20, 20') and the second hub member (7, 75) rotate relative to each other in an opposite direction.
摘要:
Moyeu de roue libre pour cycles du type dans lequel l'entraînement du moyeu 2 de roue 1, 1′ par la roue libre 100, 100′ se fait par une liaison unidirectionnelle constituée par la coopération d'au moins un cliquet 16, 16′ mobile sollicité par un système élastique 18, 163 pour passer d'une position escamotée inactive vers une position active en saillie, dans laquelle il coopère avec une denture, caractérisé en ce que le cliquet 16, 16′ est mobile dans une direction ZZ′ hors d'un plan diamétral P′, le cliquet étant disposé mobile sur le moyeu de roue 1, 1′ ou sur la roue libre 100, 100′, tandis que la denture est solidaire respectivement de ladite roue libre 100, 100′ ou du moyeu de roue 1, 1′.
摘要:
A freewheel for bicycles, composed of an inner body, from the periphery of which at least two diametrically opposed pawls project, oscillating freely on their axes fixed to the inner body, and an outer body provided with a serration in which said pawls are engaged under the thrust of respective wire spring means. Each spring is pivoted in a pin very near the pin of the respective pawl and on the same side as the point of contact between the free ends, interacting, of said spring and pawl. Furthermore, the lower surface of each pawl contains a central sliding groove for the end of the relevant spring, which also intersects the pin of the pawl.