US 5,069,655 AGranted

Driving hub for a vehicle

AssigneeFichtel & Sachs AG

InventorUlrich Schievelbusch

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Abstract

The driving hub for a vehicle, in particular a bicycle, comprises a hub shaft (1), a hub sleeve (9) which is rotatable relative to the hub shaft (1) and a driver (13) rotatably mounted on the hub shaft (1). The driver (13) drives the hub sleeve (9) via a friction gear (17) of which the first toroidal disc (25) rests rigidly on the hub shaft (1), the friction wheel carrier (45) provided with several friction wheels (35) can be driven by the driver (13) and the second toroidal disc (27) is connected via a planetary gear (21) and an overrunning clutch (23) following the planetary gear (21) to the hub sleeve (9). The smoothly adjustable step-up ratio of the friction gear (17) is controlled from the interior of the hub shaft (1) via a rod (53) which entrains the pivotally mounted spindle (37) of the friction wheels (35) via a clutch ring ( 47). The rotating toroidal disc (27) is supported via an angular ball-bearing (31) on the thrust collar (33) of an expanding clutch (19) in such a way that the tip (71) of the pressure direction cone (69) defined by the angular ball-bearing (31) is located in the vicinity of the toroidal disc (27) in the center of the hub shaft (1). The toroidal disc (27) can therefore perform tilting movements and provides uniform contact pressure on the friction wheels (35).

A driving hub for a vehicle comprising a hub shaft (1), a hub sleeve (9) which surrounds the hub shaft (1) with the same axis and rotatably relative thereto, a driver (13) rotatably mounted relative to the hub sleeve (9), a friction gear (17) which is arranged inside the hub sleeve (9), comprises two axially opposed toroidal discs (25, 27) and several friction wheels (35) distributed in the circumferential direction of the toroidal discs (25, 27) and frictionally coupling the toroidal discs (25, 27) to one another, and is arranged in the force path between driver (13) and hub sleeve (9), wherein the friction wheels (35) are rotatably mounted on spindles (37) and the spindles (37), in turn, are pivotally mounted on a friction wheel carrier (43) via pivot axes (41) extending in the circumferential direction of the toroidal discs (25, 27), at least one coupling device (23) which closes the force path between driver (13) and hub sleeve (9) when the hub is driven by the driver (13) and opens the force path when the driver (13) is not driven, a manually actuable control device (47, 51, 53) which pivots the friction wheels (35) together round the pivot axes (41) for smooth adjustment of the step-up ratio of the friction gear (17), wherein

the driver (13) is also rotatably mounted relative to the hub shaft (1), the first (25) of the two toroidal discs (25, 27) is rigidly arranged on the hub shaft (1) on the side of the second (27) of the two toroidal discs axially removed from the driver (13) and the second toroidal disc (27) is non-rotatably coupled to the hub sleeve (9) at least in the driving direction of rotation, the friction wheel carrier (43) is rotatably mounted on the hub shaft (1) and is connected in terms of drive to the driver (13) and the control device (47, 51, 53) comprises a rod (53) guided inside the hub shaft (1) and a clutch ring (47, 51) which is articulated to the spindles (37) of the friction wheels, is guided on the hub shaft (1) and is displaceable along the hub shaft (1) by means of the rod (53).

Abstract

Claims11