Abstract: A clutch having: a fixed hub, a movable hub, and a plurality of plates interposed to selectively transmit a torque. The clutch has a centrifugal pressure plate assembly having: a mass carrier; a plurality of radially movable mass elements, in which each mass element has a pivot connected to the mass carrier for displacement towards an external position under centrifugal effects; wherein the mass elements are further configured to exert axial thrust on a thrust surface of the centrifugal pressure plate assembly, to bring the movable hub closer to the fixed hub and increase the variable axial load. Each mass element has at least one respective rolling element in contact with the thrust surface. The thrust surface has a profile that is sloped and raised towards the external position.

Abstract: Described is a brake disc, rotating about its own axis of rotation, including a brake strip, an element for supporting the brake strip and a plurality of first elements for connecting the brake strip with the supporting element which can be elastically deformed in such a way as to allow a relative movement of the brake strip with respect to the supporting element. The supporting element includes at least a first component and a second component connected to the brake strip by means of the first connecting elements. A plurality of second connecting elements of the first component and of the second component are elastically deformable in such a way as to allow a relative movement between the first component and the second component.

Abstract: A clutch (100) having: a fixed hub (201), a movable hub (202), a plurality of discs (204). The fixed hub (201) and the movable hub (202) axially slide, getting farther or closer so as to transmit a variable axial load onto the discs (204). The clutch (100) has a pressure plate assembly (208) including a centrifugal assembly (210), having: a rotatable mass holder (211) and a plurality of mass elements (212) radially disposed. Each mass element (212) has a pivot (301) and is configured for a displacement (1002) by pivoting under centrifugal effects. The mass elements (212) are configured for bringing the movable hub (202) closer to the fixed hub (201), so as to increase the variable axial load and allowing the clutch (100) (automatic) engagement. Each mass element (212) has a main body (302) and a column element (303) which connects the pivot (301) with the main body (302).

Abstract: The present invention relates to a clutch (100) comprising: a rotatable housing (101); a fixed hub (201) internal to the housing (101) and a movable hub (202) axially mounted onto the fixed hub (201); a plurality of discs (204) interposed between the fixed hub (201) and the movable hub (202). The fixed hub (201) and the movable hub (202) axially slide, getting farther or closer so as to transmit a variable axial load onto the discs (204), to selectively transmit a torque. The clutch (100) further comprises a pressure plate assembly (208) for controlling the variable axial load, including a centrifugal assembly (210) comprising: a rotatable mass holder (211) and a plurality of mass elements (212) radially disposed. Each mass element (212) comprises a pivot (301) and is configured for a displacement (1002) by pivoting under centrifugal effects.