Clutch device

A clutch device for selective transmission of a torque from a first shaft or hub to a second shaft or hub, in particular for a gear-shifting system for a bicycle, comprising:

• a first clutch half connected to the first shaft or hub in a rotationally fixed manner,
• a second clutch half connected to the second shaft or hub in a rotationally fixed manner,
• a first opening device configured to generate, from an operating torque with which the first clutch half is supplied, a first opening force via which the clutch device is transitionable from a closed state, in which a torque is transmittable from the first clutch half to the second clutch half, to an opened state, in which no torque is transmittable from the first clutch half to the second clutch half, and
• an actuating device configured to control the first opening device,
• wherein the first opening device is arranged spatially separated from a torque transmission region of the clutch device, i.e., from a spatial region at which, in the closed state of the clutch device, a torque transmission from the first clutch half to the second clutch half may take place,
• wherein a movable clutch half which is one of the first clutch half and the second clutch half is movable in an axial direction of the first shaft or hub or the second shaft or hub, respectively, and wherein the first opening device has:
• at least one first link surface arranged on the movable clutch half, extending in a first direction of extension substantially in a circumferential direction of the movable clutch half and having such a first curvature that a position changes in an axial direction of a point on the first link surface along the first direction of extension, and
• at least one first link follower configured to contact the first link surface along the first direction of extension upon rotation of the movable clutch half, thereby to generate the first opening force and thereby to effect a movement of the movable clutch half in the axial direction, whereby the clutch device is transitioned from the closed state to the opened state,
• wherein the actuating device is configured to engage the at least one first link follower with the first link surface and to disengage it from the first link surface, and
• wherein the first opening device has a plurality of first link followers arranged along the circumferential direction of the movable clutch half.