Rear sprocket assembly
AssigneeShimano Inc.
InventorsHiroshi Fujita, Koji Yuasa
Life of this patent
Estimating the term…
Abstract
A rear sprocket assembly comprises a first sprocket and a lock device. The lock device includes a first lock member, a second lock member, and a biasing member. The first lock member includes a first axial end and a second axial end. The second lock member includes a third axial end and a fourth axial end. The fourth axial end has at least one radial projection configured to abut against the first sprocket in the axial direction in a mounting state. The biasing member is disposed between the first sprocket and the at least one radial projection in the axial direction in the assembled state to bias the first sprocket and the at least one radial projection in a biasing direction in which the first sprocket and the at least one radial projection are separated from each other.
Claims14
A rear sprocket assembly configured to be mounted to a rear hub assembly for a human-powered vehicle, the rear sprocket assembly having a rotational center axis to define an axial direction, a radial direction and a circumferential direction, the rear sprocket assembly comprising:
- a first sprocket being a smallest sprocket in the rear sprocket assembly and including:
- a first sprocket body,
- a plurality of first sprocket teeth extending radially outwardly from the first sprocket body in the radial direction, and
- a first sprocket opening configured to receive a hub axle of the rear hub assembly in a mounting state where the rear sprocket assembly is mounted to the rear hub assembly, the first sprocket opening having a first radially minimum diameter that is smaller than an outermost diameter of a sprocket support body of the rear hub assembly;
- and
- a lock device configured to fix the rear sprocket assembly to the sprocket support body of the rear hub assembly in the mounting state and including:
- a first lock member including:
- a first axial end configured to be detachably attached to the sprocket support body of the rear hub assembly in the mounting state;
- and
- a second axial end opposite to the first axial end in the axial direction;
- a second lock member including:
- a third axial end configured to be attached to the second axial end of the first lock member in an assembled state where the first sprocket and the lock device are assembled as one unit;
- and
- a fourth axial end opposite to the third axial end in the axial direction and having at least one radial projection configured to abut against the first sprocket in the axial direction in the mounting state;
- and
- a biasing member disposed between the first sprocket and the at least one radial projection in the axial direction in the assembled state to bias the first sprocket and the at least one radial projection in a biasing direction in which the first sprocket and the at least one radial projection are separated from each other,
- the lock device being configured so that the first sprocket is slidable relative to the lock device in the axial direction in the assembled state and before the mounting state.
Dependencies are inferred from the claim text.