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公开(公告)号：US20230087985A1
公开(公告)日：2023-03-23
申请号：US17908952
申请日：2021-02-26
申请人： PIAGGIO & C. S.P.A.
摘要： A parking brake includes an inhibitor device (31), which can be associated with a drive shaft (3) for rotating therewith, the inhibitor device (31) being actuated by centrifugal force. The parking brake further includes a locking member (33) adapted to engage the inhibitor device (31) when actuated. The inhibitor device (31) is configured to prevent the engagement of the locking member with the inhibitor device when the inhibitor device rotates at a speed greater than a minimum speed, so as to prevent the application of the parking brake.
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公开(公告)号：US20210190195A1
公开(公告)日：2021-06-24
申请号：US16334454
申请日：2017-09-19
申请人： PIAGGIO & C. S.p.A.
发明人： Paolo NESTI , Walter MARIOTTI , Giacomo FRESCHI
摘要： 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 (91a) which delimits a housing compartment (91c) and said driven cam portion (95) protrudes radially internally from said inner surface (91a). The drive cam portion (111) of the fixed bushing (11) is suitable to penetrate axially in said housing compartment of the mobile bushing (9).
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3.发明申请公开(公告)号：US20180355967A1
公开(公告)日：2018-12-13
申请号：US16060827
申请日：2016-12-01
申请人： PIAGGIO & C. S.p.A.
发明人： Walter MARIOTTI , Giacomo FRESCHI , Paolo NESTI
CPC分类号： F16H55/563 , F16H9/18
摘要： A continuously variable transmission device (1) for a two-wheel, three-wheel or four-wheel motorcycle includes a cam system (20, 22; 32a, 32b) operating between a fixed bushing (11) and a mobile bushing (9). The device is configured to obstruct the approach between the active surfaces (8a, 10a) or to facilitate the approach of the active surfaces.
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公开(公告)号：US20220381161A1
公开(公告)日：2022-12-01
申请号：US17641763
申请日：2020-09-11
申请人： PIAGGIO & C. S.P.A.
发明人： Walter MARIOTTI
摘要： A combustion engine for a vehicle includes a device for changing the timing of suction/relief valves with respect to the drive shaft. The device includes a first disc idly mounted to the camshaft and has a first side defining first slot tracks. A second disc is integral with the camshaft and includes second slot tracks facing the first side of the first disc. Drive elements transmit motion between the first disc and the second disc and each is accommodated between corresponding two of the partially facing tracks. As centrifugal forces caused by the rotation speed of the camshaft changes, each drive elements moves between a first reference position and a second reference position which are close to and far from the rotation axis of the camshaft, respectively. A phase changer device exerts a force which tends to oppose movement of said drive elements towards the second reference position.
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公开(公告)号：US20180372191A1
公开(公告)日：2018-12-27
申请号：US16060750
申请日：2016-12-01
申请人： PIAGGIO & C. S.p.A.
发明人： Walter MARIOTTI , Giacomo FRESCHI , Paolo NESTI
摘要： A continuously variable transmission device (1) for a two-wheel, three-wheel or four-wheel motorcycle includes a gear shift regulation device suitable to operate on special rollers (18) through an adjustable axial action independently of the number of engine revolutions. The device influences the centrifugal movement of the rollers (18) and thus influences the gear shift.
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公开(公告)号：US20190389538A1
公开(公告)日：2019-12-26
申请号：US16465322
申请日：2017-11-30
申请人： PIAGGIO & C. S.p.A.
发明人： Walter MARIOTTI , Luca NUTI
摘要： A high performance synchronous transmission to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, comprising on the crankshaft a centrifugal clutch, for the automatic engagement of the first speed above a predetermined rotation regime, and a driving pulley apt to transmit the motion through a subsequent kinematic chain, is provided with a coupling between crankshaft and driving pulley which connects them directly, by determining with its own engagement the exclusion of said centrifugal clutch, said coupling being controlled in disengagement when a control lever is in active position.
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公开(公告)号：US20180223974A1
公开(公告)日：2018-08-09
申请号：US15749458
申请日：2016-08-01
申请人： Piaggio & C. S.p.A
发明人： Paolo NESTI , Walter MARIOTTI
CPC分类号： F16H37/043 , B62K2202/00 , B62M7/12 , B62M9/04 , B62M11/06 , F16H3/089 , F16H3/10 , F16H9/24 , F16H37/02 , F16H2200/0043
摘要： A four-speed transmission (1) for motorcycles has performances similar to those of a continuously variable transmission but, at the same time, a high yield and an easy and automatic operation and it comprises: a crankshaft (2) with a first and a second pulley (9, 10) mounted thereon; a primary shaft (3), with third and fourth pulley (10, 14) and a first and a second gear (18, 19) mounted thereon; transmission belts (11, 13) connecting said pulleys for the transmission of the first and the second speed and of the third and the fourth speed respectively; a secondary shaft (4) with a third and a fourth gear (20, 21) engaged with said first and second gear (18, 19) for transmitting the first and the third speed, and the second and the fourth speed respectively; a first synchronizer (16), which activates the transmission of the third and the fourth speed; and a second actuated synchronizer (17), actuating the transmission of the second and the fourth speed; wherein a first and a second free wheel (15, 22) can release the transmission of the third and the fourth speed and of the first and third speed respectively.
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公开(公告)号：US20220298932A1
公开(公告)日：2022-09-22
申请号：US17641727
申请日：2020-09-11
申请人： PIAGGIO & C. S.P.A.
发明人： Walter MARIOTTI
摘要： A combustion engine for a vehicle includes a first centrifugal device for varying timing of a first plurality of suction or relief valves with respect to the drive shaft. A driving disc is mounted idle on a first camshaft which controls the valves, and at least one driven disc is integral with the camshaft. Drive elements for transmitting motion from the driving disc to the driven disc are interposed between the two discs causing a relative rotation of the driven disc with respect to the driving disc when the rotation speed of the discs exceeds a predetermined threshold. A distribution system connects the drive shaft with the driving disc so as to cause the rotation thereof. A second gear meshes with a first gear so that rotation of the driving disc mounted on the first camshaft causes the rotation of the second camshaft to control other valves of the engine.
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公开(公告)号：US20190389536A1
公开(公告)日：2019-12-26
申请号：US16465329
申请日：2017-11-30
申请人： PIAGGIO & C. S.p.A.
发明人： Luca NUTI , Walter MARIOTTI
摘要： A synchronized transmission, which can be used aboard a vehicle and in particular a motorcycle, wherein the crankshaft actuated by the engine and the driven shaft, connected to a rear wheel, are substantially parallel therebetween, the driven shaft receiving the motion from a primary shaft kinematically connected to the crankshaft, wherein the primary shaft has at least one toothed wheel, which transmits the motion to said driven shaft, arranged on a driven bushing assembled on the primary shaft, the primary shaft comprising a passing-through axial channel wherein an actuation stem is inserted, comprising a clutch, acting on said driven bushing and actuated axially through said stem, which makes said driven bushing integral to the motion transmission so as to exclude the reversibility of the free wheel itself.
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