Bicycle hub
AssigneeShimano Inc.
InventorKazuki Koshiyama
Life of this patent
Estimating the term…
Abstract
A bicycle hub basically has a hub axle, a hub shell, a sprocket support body, a first ratchet member and a second ratchet member. The hub shell is rotatably mounted on a hub axle about a rotational axis. The sprocket support body is rotatably mounted on the hub axle to rotate around the rotational axis. The sprocket support body has an outer peripheral surface with a first helical spline. The first ratchet member has at least one first ratchet tooth and a second helical spline mating with the first helical spline. The second ratchet member has at least one second ratchet tooth mating with the at least one first ratchet tooth and a hub shell engagement portion that engages the hub shell The outer peripheral surface of the sprocket support body has a guiding portion that guides the first ratchet member toward the hub shell while coasting.
Claims20
A bicycle hub comprising:
- a hub axle defining a rotational axis;
- a hub shell rotatably mounted on the hub axle to rotate around the rotational axis;
- a sprocket support body rotatably mounted on the hub axle to rotate around the rotational axis, the sprocket support body having an outer peripheral surface with a first helical spline;
- a first ratchet member having at least one first ratchet tooth and a second helical spline mating with the first helical spline;
- and
- a second ratchet member having at least one second ratchet tooth mating with the at least one first ratchet tooth and a hub shell engagement portion that engages the hub shell,
- the outer peripheral surface of the sprocket support body having a guiding portion configured to guide the first ratchet member toward the hub shell while coasting, the guiding portion arranged to define an obtuse angle with the first helical spline.
Dependencies are inferred from the claim text.