A driving device for an electric vehicle includes a pedal shaft, first and second electric motors, an output shaft, and a superposition transmission whose gear ratio is steplessly adjustable by way of the electric motors. The transmission also couples the pedal shaft and the output shaft to each other. A torque generated by the first electric motor and/or the second electric motor can be at least partially transmitted to the output shaft. The driving device further includes an electronic anti-theft device used to lock the bicycle. When locked, at least one of the electric motors is operable to generate a torque that counteracts a rotation of the pedal shaft in a forward direction of rotation to inhibit theft of the bicycle.

A transmission for a bicycle includes an input shaft (1) which is rotationally fixable to a crankshaft (2), and an output shaft (3) which is rotationally fixable to an output gear. The transmission includes at least three planetary transmissions which are operatively connected to the input shaft and to the output shaft. A single one of the planetary transmissions includes a stepped planetary gear (4) with a first gear teeth section (5) having a first diameter and a second gear teeth section (6) having a second diameter.

A transmission for a bicycle includes a transmission input shaft (1) which is rotationally fixable to a crankshaft (2) and also includes first, second and third planetary gear sets (PS1, PS2, PS3) which are operatively connected to one another. An element of the first planetary gear set (PS1) is rotationally fixed to the transmission input shaft (1). The first planetary gear set includes a planet gear encompassing a first planetary gear stage (3) and a second planetary gear stage (5). A first ring gear (6) is engaged with a gear teeth section of the first planetary gear stage (3) and is rotationally fixable to a transmission housing (4) with a first shift element (s1). A second ring gear (7) is engaged with a gear teeth section of the second planetary gear stage (5) and is rotationally fixable to the transmission housing (4) with a second shift element (S2).

A system for assisting a user in moving a device relative to a structure comprises a magnetorheological (MR) fluid actuator unit including at least one torque source and at least one MR fluid clutch apparatus having an input coupled to the at least one torque source to receive torque from the at least one torque source, the MR fluid clutch apparatus controllable to transmit a variable amount of assistance force via an output thereof. An interface is configured for coupling the output of the at least one MR fluid clutch apparatus to the device or surrounding structure. At least one sensor provides information about a movement of the device. A processor unit for controlling the at least one MR fluid clutch apparatus in exerting the variable amount of assistance force as a function of said information, wherein the system is configured for one of the MR fluid actuator unit and the interface to be coupled to the structure, and for the other of the MR fluid actuator unit and the interface to be coupled to the device for the assistance force from the MR fluid actuator unit to assist in moving the device.

The gearbox clutch support structure containing a crank, a crank bearing, a clutch pipe, a leverage and a bottom bracket cup characterized in that it contains said crank bearing (2) that is mounted in said crank (1) and it contains said clutch pipe (3) that is mounted inside of said crank bearing (2), wherein said clutch pipe (3) is rigidly fixed to said leverage (4), wherein said leverage (4) is mounted on said bottom bracket cup (5).

A load cell for determining a radial force acting on a crankshaft having a receiving sleeve for receiving a bearing ring and a fastening ring for attaching the load cell in a transmission housing. Axial support areas are provided on the fastening ring for axially supporting the outer ring of the first bearing. Moreover, measuring regions for receiving radial forces of the receiving sleeve are provided which connect the receiving sleeve with the fastening ring. Strain sensors are attached to at least two of the measuring regions.

A transmission for a bicycle includes at least four shift elements, an input shaft (1), a first planetary gear set (PS1) which is operatively connected to the input shaft (1), a second planetary gear set (PS2) which is operatively connectable to the input shaft (1), and an output shaft (2). The input shaft (1) is rotationally fixed to a ring gear of the first planetary gear set (PS1), and the output shaft (2) is rotationally fixed to a carrier of the first planetary gear set (PS1).

A power unit for a pedal vehicle includes a pedal shaft, an output shaft arranged to transfer torque to a vehicle wheel, a main epicyclic gear set arranged to control transmission ratio between the pedal shaft and the output shaft, an assist motor connected to an assist gear of the main epicyclic gear set, and a control motor connected to a control gear of the main epicyclic gear set. The control motor and the control gear form a control assembly of the power unit. The power unit includes a one-way clutch provided to the control assembly of the power unit and arranged to transmit rotation in only a first rotation direction.

A propulsion device for a two-wheeled vehicle includes a mechanism for providing traction to a rear wheel for manual advancement of the vehicle and a first epicyclic gear reducer coupled with the mechanism and drivable by a first control device configured for varying the geometric configuration of the first epicyclic gear reducer and thus the gear ratio. A motor for assisting pedalling is interposed between the mechanism for the bottom bracket and the rear wheel and is coupled with a second epicyclic gear reducer, drivable by a second control device configured for varying the geometric configuration of the second epicyclic gear reducer and thus the corresponding gear ratio. The second epicyclic gear reducer is coupled and directly in contact with the rear wheel in order to transmit the movement from the propulsion device thereto.

The transmission (10) comprises a support (40) where an input central shaft (1) is rotatably supported. A central wheel (11) is integral with the central shaft (1) and rotates therewith. The transmission further comprises an output wheel (18) and a rotary unit (100) rotatably supported by the support (40) around a rotation axis (100) to take a plurality of angular positions. Selectable gear pairs (101-109) are rotatably supported on the rotary unit (100). A rotation mechanism of the rotary unit (100) brings the rotary unit (100) into one of said angular position selectively. In each angular position of the rotary unit (100) a selectable gear pair (101-109) transmits motion from the central wheel (11) to the output wheel (18);