Abstract:
A variety of transmission mechanisms are provided that include 'radially inverted' pulleys that are nested within each other or otherwise overlap in order to exert 'inward' forces onto a compressive belt that transmits power between the pulleys. By exerted forces 'inward' onto the belt, the belt can be subjected to net compression everywhere along its length. This allows the belt to be less complex and to have a lower cost than belts of transmissions that exert forces 'outward' from pulleys onto a belt, thus requiring expensive and technically challenging belt packs or other elements to sustain the longitudinal tensions experienced by such belts, even when such belts are operated as "push" belts. Transmissions that include such 'radially inverted' pulleys can exhibit reduced size and cost and increased power capacity compared to transmissions that employ 'non-radially inverted' pulleys.
Abstract:
A speed-changing device for a two-wheeled vehicle (2) comprising: - circular support means (3A, 3B) suitable for being mounted on a hub (4) of a wheel (5) of the two-wheeled vehicle (2), - a plurality of lamellar meshing elements (6) supported by the circular support means (3A, 3B) and radially arranged around a rotation axis (A), the lamellar meshing elements (6) being arranged for engaging with a transmission element (T) of the chain or belt type of the vehicle (2), - each lamellar element (6) being provided with a shaped meshing edge (S) comprising a sequence of zones (Z1, Z2,..., Zn) located at different distances from the axis (A) of rotation, - the meshing lamellar elements (6) being grouped in a first series (W1) of lamellar elements (6) of meshing and a second series (W2) of meshing lamellar elements (6) mutually opposite and movable to and from one another to change a meshing radius (R) with the transmission element (T) and thus vary a corresponding kinematic transmission ratio, - a distance-adjusting member (10) actuatable to move the first series (W1) and the second series (W2) of meshing lamellar elements (6) towards and away from one another.
Abstract:
A drive clutch having an engine braking feature for a continuously variable transmission is provided. The drive clutch includes a post that is coupled to an output of an engine. A fixed sheave, coupled to the post, has a fixed sheave belt engagement face. A movable sheave assembly that includes a movable sheave belt engaging face, is configured to move axially on the post to move the movable sheave belt engaging face in relation to the fixed sheave belt engaging face depending on a rotational speed of the drive clutch. An idler bearing is mounted on the post at least in part between the movable sheave belt engaging face and the fixed sheave belt engaging face. The idler bearing includes a one-way rotational assembly and has an outer belt engaging surface with outward extending cogs configured to engage teeth of a belt to prevent slippage during engine braking.
Abstract:
Die vorliegende Erfindung betrifft ein CVT-Getriebe, umfassend ein Kegelscheibenpaar (2) mit wenigstens einer axial beweglichen Kegelscheibe (21); eine Stelleinrichtung (5) zur Verstellung einer Position der axial beweglichen Kegelscheibe (21), und eine Steuereinheit (6), welche eingerichtet ist, die Stelleinrichtung (5) zu betätigen, um die Position der axial beweglichen Kegelscheibe (21) zu verändern, wobei die Steuereinheit (6) eine pneumatische Druckdose (50) umfasst, um die axial bewegliche Kegelscheibe (21) mittels einer Pneumatikkraft zu verstellen.
Abstract:
Die Erfindung betrifft ein CVT-Getriebe, umfassend ein erstes Kegelscheibenpaar (2) mit einer ortsfesten Kegelscheibe (20) und einer axial beweglichen Kegelscheibe (21), ein Abtriebselement (25), insbesondere ein zweites Kegelscheibenpaar, ein Umschlingungsmittel (12), welches das erste Kegelscheibenpaar (2) mit dem Abtriebselement (25) verbindet, eine Stelleinrichtung (5) zur Verstellung der axial beweglichen Kegelscheibe (21), mittels eines Stellantriebs (50), und eine Steuereinheit (6), welche eingerichtet ist, die Stelleinrichtung (5) ansteuern, um eine Verstellung der axial beweglichen Kegelscheibe (21) zu erreichen.
Abstract:
A continuously variable transmission with increased ratio coverage and provided with a drive belt (3) including a ring set (31) and with two pulleys (1, 2), each comprising two, relatively axially displaceable pulley discs (4, 5), where between a circumference section of the drive belt (3) is held and a method for controlling such continuously variable transmission. During operation of the transmission and at least at one pulley (1, 2) thereof, the ring set (31) extends at least partly beyond a radial dimension of the pulley discs (4, 5) at a point of entry of the drive belt (3) between the pulley discs (4, 5) of such respective pulley (1, 2) and, simultaneously, is located between and is constrained in the axial direction by the pulley discs (4, 5) at a point of exit of the drive belt (3) from between the pulley discs (4, 5) of such respective pulley (1, 2).
Abstract:
Sistema axial de transmisión que el sistema comprende: - una polea motriz (1) provista de un plato fijo (11), y un plato móvil (12) desplazable a lo largo de un eje motriz (10) y que presenta en una cara externa de una serie de alojamientos (13) inclinados y divergentes en los que en encuentran alojadas unas masas (14) desplazables inercialmente contra una campana (4); presentando los alojamientos (13) y las masas (14) una configuración no cilíndrica; una polea conducida (2) provista de un plato fijo (21) solidario a un eje de salida (20); un plato móvil (22) provisto de medios de desplazamiento en dirección axial, por su propia inercia respecto al eje de salida (20); una correa que relaciona en giro a las poleas motriz y conducida (1, 2).
Abstract:
A CVT drive system comprising a moveable sheave axially moveable along a first shaft and having a radially extending surface, a fixed sheave fixed to the first shaft, the fixed sheave cooperatively disposed with the moveable sheave to engage a belt therebetween, the first shaft engagable with an engine output, a back plate attached to the first shaft and having a radial surface, the back plate engaged with the moveable sheave for a locked rotation while allowing a relative axial movement, an inertia member radially moveable upon the radially extending surface and the radial surface upon rotation of the moveable sheave, the inertia member is temporarily disengagable from the radial surface and from the radially extending surface, a first spring resisting axial movement of the moveable sheave toward the fixed sheave along the first shaft, and a sleeve member disposed between the moveable sheave and the fixed sheave, the sleeve member rotatable with the belt.
Abstract:
A CVT transmission comprising a shaft (1) journalled to a housing (4); a first sheave (14) fixed to the shaft (1); a second sheave (12) moveable parallel to an axis of rotation (IA) of the shaft; the second sheave locked in rotating relation with the first sheave by a first sheave member (22) cooperatively engaged with a second sheave receiving member (12A), the second sheave receiving member disposed at a helical angle (HA) with respect to the axis of rotation; a sprocket (6) journalled to the housing; the sprocket threadably engaged (6B) with a movable member (26), a bearing (16) disposed between the movable member and the second sheave; the movable member engaged (5A) with the housing whereby movement of the movable member is parallel with the axis of rotation; an electric actuator (30) engaged with the sprocket; and the second sheave is axially movable upon a rotation of the sprocket.