Freewheel system for a bicycle hub
AssigneeOrbea, S. Coop.
InventorsJuan Carlos Cambronero González, Luís Serrano Fuentes
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Abstract
A freewheel system for a bicycle hub, comprising an inner ratchet fixed to a hub body and an outer ratchet fixed to a freehub. This system is particular in that an internal surface of the inner ratchet is coupled to an external surface of a connection shell joined to the body, where a diameter of the internal surface of the connection shell is larger than a diameter of a bearing connecting the hub body and the axle. Similarly, also the coupling between the outer ratchet and the freehub can be carried out by the interaction between the internal surface of the outer ratchet and the external surface of the freehub. An inner ratchet and an outer ratchet are also described.
Claims15
Freewheel system for a bicycle hub, comprising an inner ratchet fixed to a hub body and an outer ratchet fixed to a freehub,
- where an inner face of the outer ratchet comprises a toothing formed by teeth that are tangentially inclined in a direction opposite the forward direction, and an outer face of the inner ratchet comprises a toothing formed by teeth that are tangentially inclined in the forward direction,
- where the outer ratchet and the inner ratchet are coupled one to the other such that, when the freehub tends to rotate with respect to the body in the forward direction, the toothing on the inner face of the outer ratchet engages the toothing on the outer face of the inner ratchet, the inner ratchet being dragged by the outer ratchet while, when the freehub rotates with respect to the body in a direction opposite the forward direction, the toothing on the inner face of the outer ratchet remains disengaged from the toothing of the outer face of the inner ratchet, the outer ratchet rotating freely without dragging the inner ratchet,
- wherein an internal surface of the inner ratchet is coupled to an external surface of a connection shell moving together with the body, where a diameter of an internal surface of the connection shell is larger than a diameter of a bearing connecting the body with the axle.
Dependencies are inferred from the claim text.