Piaggio & C. S.p.A.

A clutch ( 1 ) includes a housing ( 3 ) connected to a drive input member ( 5 ). First friction discs ( 7 ) are mounted in the housing and rotate therewith. Second friction discs ( 9 ) are mounted on a driven member ( 11 ). A pressure plate ( 13 ) is elastically stressed toward the driven member to compress the first and the second friction discs ( 7, 9 ) against one another. Cam profiles ( 31, 33 ) integral with the driven member and with the pressure plate, generate a thrust to move the driven member and pressure plate away from each other when it is necessary to reduce the pressure exerted by the pressure plate on the first and second friction discs. An angular stroke limiter limits the relative rotation between the driven member and the pressure plate and thereby limits the movement of the pressure plate away from the driven member).

The present invention relates to a saddle-ride type vehicle comprising a clutch assembly ( 4 ), interposed between an engine ( 2 ) and a gearbox ( 3 ), which includes a clutch device ( 11 ) in turn comprising two clutch elements (one integral with the shaft of the engine and the other with the input shaft of the gearbox) and return means ( 12 ) that keep these elements ( 11 A, 11 B) in contact in a closure condition of the clutch. According to the invention, the clutch assembly ( 4 ) further comprises an operating device ( 21 ) of the clutch device that causes detachment of the elements ( 11 A, 11 B) of the clutch device up to an opening condition of the clutch assembly. This latter further comprises a control device ( 6 ) to limit the torque peaks during gear change. This device comprises an actuation means ( 5 ) that, during gear change, exerts a predetermined force (S) in contrast to the force exerted by said return means ( 12 ) of the clutch assembly, wherein said predetermined force (S) is less than the force (F) generated by the return means ( 12 ) so as to cause a mutual slip of the elements ( 11 A, 11 B) of the clutch device ( 11 ) without said opening condition being reached. The operating device ( 21 ) is of hydraulic type and comprises a primary pump ( 22 ) operated by means of a control lever ( 23 ), wherein this primary pump ( 22 ) is hydraulically connected, through a primary hydraulic circuit ( 16 ), to a primary piston ( 24 ) acting on at least one of the elements ( 11 A, 11 B) of the clutch device ( 11 ) in opposition to the return means ( 12 ) so that, following an action on the control lever ( 23 ), the primary piston ( 24 ) exerts an action the elements ( 11 A, 11 B) determining the opening condition. According to the invention, the control device ( 6 ) comprises a secondary piston ( 25 ) connected to the primary piston ( 24 ), wherein the actuation means ( 5 ) exerts, directly or indirectly, the predetermined force (S) on the secondary piston ( 25 ), said predetermined force (S) being transferred to the primary piston ( 24 ) in opposition to the force (F) of the return means ( 12 ).

A locking system for a vehicle having a locking device and a gear motor operatively connected to the locking device and configured to cause the locking device to take a stable locking state and a release state, where the gear motor includes a drive motor having an input shaft, a first transmission wheel coupled to a first portion of the input shaft and a second transmission wheel coupled to a second portion of the input shaft.

A clutch ( 1 ) includes a housing ( 3 ) connected to a drive input member ( 5 ). First friction discs ( 7 ) are mounted in the housing and rotate therewith. Second friction discs ( 9 ) are mounted on a driven member ( 11 ). A pressure plate ( 13 ) is elastically stressed toward the driven member to compress the first and the second friction discs ( 7, 9 ) against one another. Cam profiles ( 31, 33 ) integral with the driven member and with the pressure plate, generate a thrust to move the driven member and pressure plate away from each other when it is necessary to reduce the pressure exerted by the pressure plate on the first and second friction discs. An angular stroke limiter limits the relative rotation between the driven member and the pressure plate and thereby limits the movement of the pressure plate away from the driven member).

A locking system for a vehicle having a locking device and a gear motor operatively connected to the locking device and configured to cause the locking device to take a stable locking state and a release state, where the gear motor includes a drive motor having an input shaft, a first transmission wheel coupled to a first portion of the input shaft and a second transmission wheel coupled to a second portion of the input shaft.

A synchronized transmission ( 1 ) used in a motorcycle, wherein a crankshaft actuated by the engine and a driven shaft, connected to a rear wheel, are substantially parallel and kinematically connected therebetween, comprising a first axial actuation synchronizer ( 16 ) placed at the front of the crankshaft ( 2 ) and a second axial actuation synchronizer ( 17 ) arranged at the front of a driven shaft kinematically connected to a rear wheel, each synchronizer ( 16, 17 ) comprising a respective rotating cam actuator ( 26, 29 ) having a cam ( 29 ) apt to be rotated by a respective cam spindle ( 30 ) by determining a translation thereof which interferes with an actuation end of the respective synchronizer ( 16, 17 ).

A CVT transmission device ( 1 ) comprises a drive pulley ( 4 ) provided with a mobile bushing ( 9 ), a fixed bushing ( 11 ), a cam system ( 95,111; 97,113 ) comprising at least one driven cam portion ( 95 ) of mobile bushing ( 9 ) and a cam portion ( 111 ) of the fixed bushing ( 11 ). The mobile bushing ( 9 ) comprises a main wall ( 91 ) annular with respect to the axis of rotation (X), having an inner surface ( 91 a ) which delimits a housing compartment ( 91 c ) and said driven cam portion ( 95 ) protrudes radially internally from said inner surface ( 91 a ). The drive cam portion ( 111 ) of the fixed bushing ( 11 ) is suitable to penetrate axially in said housing compartment of the mobile bushing ( 9 ).

A transmission gearbox, in particular of a motor vehicle, is described including: a primary shaft receiving a driving torque via a primary transmission; a secondary shaft connected to the primary shaft. On the secondary shaft: an idle wheel revolvingly non-working on the secondary shaft including at least a coupling slot, and at least a coupling wheel revolvingly integral to the secondary shaft including a corresponding coupling tooth are assembled, respectively. The coupling wheel is arranged adjacent to the idle wheel and it can be axially moved so as to translate axially between a free configuration, where it is disengaged with respect to the idle wheel, and an engaged configuration, where it is engaged with the idle wheel by implementing a front coupling between the coupling tooth and the coupling slot for transmitting the motion between the primary shaft and the secondary shaft.

A CVT transmission device ( 1 ) comprises a drive pulley ( 4 ) provided with a mobile bushing ( 9 ), a fixed bushing ( 11 ), a cam system ( 95,111; 97,113 ) comprising at least one driven cam portion ( 95 ) of mobile bushing ( 9 ) and a cam portion ( 111 ) of the fixed bushing ( 11 ). The mobile bushing ( 9 ) comprises a main wall ( 91 ) annular with respect to the axis of rotation (X), having an inner surface ( 91 a ) which delimits a housing compartment ( 91 c ) and said driven cam portion ( 95 ) protrudes radially internally from said inner surface ( 91 a ). The drive cam portion ( 111 ) of the fixed bushing ( 11 ) is suitable to penetrate axially in said housing compartment of the mobile bushing ( 9 ).