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US 5,961,417 AGranted
Continuously adjustable transmission arrangement
AssigneeVolkswagen Aktiengesellschaft
InventorsArthur Schneider, Lars Hofmann
Life of this patent
Estimating the term…
Abstract
A continuously adjustable transmission has two sets of cone pulleys disposed concentrically with respect to each other on a transmission input shaft. Between the two sets of cone pulleys a rigid ring acts as a torque transmitting member for transmitting torque from one set of cone pulleys to the other. This arrangement provides a compact and lightweight transmission producing the best transmission efficiency levels, especially at high and medium gear ratios.
Claims30
A continuously adjustable transmission arrangement comprising:
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft and;
- wherein the two pairs of cone pulleys comprise an inner cone pulley pair surrounded by an outer cone pulley pair and wherein a first of the cone pulleys of the outer cone pulley pair is rotatably supported an axially fixed on a large diameter region of a supporting shaft and a second cone pulley of the outer cone pulley pair is mounted in rotatable and axially displaceable relation with respect to a reduced-diameter region of the supporting shaft.
3 more elements
A continuously adjustable transmission arrangement comprising:
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft;
- including a force-applying means between an end face of a cone pulley and a collar on a reduced diameter region of the supporting shaft to apply a contact pressure against the torque transmitting member;
- and
- wherein the force-applying means is a pressure operated piston and cylinder arrangement, which produces a contact pressure in accordance with a desired gear ratio or an input torque to the transmission.
5 more elements
A continuously adjustable transmission arrangement comprising:
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft;
- wherein the torque transmitting member comprises a rigid ring;
- including a pressure control member affixed to a transmission housing and at least one pressure applying element engaging the rigid ring for transmitting pressure thereto from the pressure control member so as to move the rigid ring radially with respect to the longitudinal axis of the shaft;
- and
- wherein the pressure control member is a piston and cylinder arrangement and an actuating rod which supports at least one rotatably mounted pressure roller at one end and is connected to the piston and cylinder arrangement at another end.
6 more elements
A continuously adjustable transmission arrangement comprising:
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft;
- wherein the torque transmitting member comprises a rigid ring;
- including a pressure control member affixed to a transmission housing and at least one pressure applying element engaging the rigid ring for transmitting pressure thereto from the pressure control member so as to move the rigid ring radially with respect to the longitudinal axis of the shaft;
- and
- wherein the pressure control member is a support member having an arc-shaped section supporting at least one rotatably mounted pressure roller and including an actuating device at one end of the support member and wherein another end of the support member is pivotally supported on the transmission housing.
6 more elements
A continuously adjustable transmission arrangement comprising:
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft;
- wherein the torque transmitting member comprises a rigid ring;
- including a pressure control member affixed to a transmission housing and at least one pressure applying element engaging the rigid ring for transmitting pressure thereto from the pressure control member so as to move the rigid ring radially with respect to the longitudinal axis of the shaft;
- and
- wherein the pressure control member is a control lever which is pivotally supported at one end on the transmission housing and which has a side facing the cone pulleys which supports at least one pressure element and has a side facing away from the cone pulleys which is movable by an actuating device.
6 more elements
A continuously adjustable transmission arrangement comprising;
- two pairs of cone pulleys;
- and
- a torque transmitting member disposed between and engaging the two pairs of cone pulleys;
- one pair of cone pulleys being driven by a transmission input shaft and the second pair of cone pulleys driving a transmission output shaft;
- wherein the two pairs of cone pulleys are supported concentrically with respect to each other on one of the transmission drive shaft and the transmission output shaft;
- and
- wherein the torque transmission member is a rigid ring having a cross-sectional geometry with an outer contour which includes least four radii, two of the radii adjacent to the outer periphery of the ring being larger than two of radii located inwardly from the outer periphery of the of the ring.
4 more elements
Dependencies are inferred from the claim text.