Machine element or mechanism – Gearing – Interchangeably locked
Reexamination Certificate
1999-12-08
2001-04-24
Wright, Dirk (Department: 3681)
Machine element or mechanism
Gearing
Interchangeably locked
Reexamination Certificate
active
06220109
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a method and an apparatus for automated actuation of a transmission shiftable between a plurality of gears with a torque transmitting system being actuated automatically at least during a gear change, at least one actuating element actuatable by at least one rive unit and at least one actuatable shift element disposed at the transmission side.
Systems of this type are known in the art. Manufacturing tolerances and/or different nominal dimensions resulting from the machining of transmission, actuator and parts thereof may cause the transmission-internal shift elements to move into a final position when the transmission is actuated for shifting, before the drive unit or the actuating elements are in their respective final positions. When these actuating elements subsequently assume their respective final positions and are actuated, the transmission-internal shift elements are stressed beyond their final positions, which causes increased wear or a malfunction.
SUMMARY OF THE INVENTION
An object of the invention is to provide an apparatus which, in spite of the existing tolerances and/or different nominal dimensions caused during the machining of the apparatus, provides an improved functionality.
Another object of the invention is to provide an apparatus which ensures a more satisfactory operational reliability and operativeness and, at the same time, can be produced in a simple and inexpensive manner.
This is accomplished with the novel apparatus in that a driving connection is provided between at least one actuatable shifting element on the transmission side and at lest one drive unit, and that additional presettable elasticity of an elastic means and/or a presettable elastic element is provided in the power transmitting path of the driving connection between the at least one drive unit and the at least one shifting element.
It is of advantage if the additional presettable elastic element is disposed in the power transmitting path between the actuating element and the at least one shift element on the transmission side.
It can also of advantage if the additional presettable elastic element is disposed in the power transmitting path between a drive unit and the actuating element.
This can also be accomplished wherein an apparatus for automated actuation of a transmission shiftable between a plurality of gears wherein a torque transmitting system is actuated automatically at least during a gear change, at least one actuating element is actuatable by at least one drive unit and at least on actuatable shifting element is disposed at the transmission side, by providing a driving connection between the at least one actuatable shifting element at the transmission side and the at least one drive unit, and in that in the power transmitting path of the driving connection between the at least one drive unit and the at least one shifting element, there is movably arranged—by way of at least one elastic element—an actuating element for moving relative to the elastic element.
It may be of advantage if an actuating element in the power transmitting path between the drive unit and the transmission-internal shifting elements is moveable with respect to the at least one elastic element.
It may also of advantage if the additional elastic element is an energy storing device, such as a spring or a plastic part.
Furthermore, it may be of advantage if the elastic element consists of at least one initially stressed (prestressed) energy storing device.
However, it also within the purview of the invention, if the elastic element consists of at least one energy storing device which is not initially stressed.
In accordance with a further novel concept, a method and an apparatus are provided for actuation of an automated transmission which is shiftable between a plurality of gears by a torque transmitting system which is actuated automatically at least during a gear change, at least one actuating element being actuatable by at least one drive unit and at least one actuatable shifting element being disposed at the transmission side and wherein at least one drive unit initiates a selection between shifting channels of the transmission and at least one drive unit effects a gear shifting with a shifting channel of the transmission. A driving connection is provided between the at least one actuatable shifting element at the transmission side and each of the drive units, and an additional presettable elastic means or an additional element having a presettable elasticity is provided between at least one of the drive units and the at least one shifting element.
It may be of advantage if the elastic means is disposed in the power transmitting path between a drive unit for selecting a shifting channel and a shifting element.
Further, it can be of advantage if the elastic means is disposed in the power transmitting path between a drive unit for selecting a shifting channel and a shifting element. Further, at least one additional presettable elastic means or an additional element with a presettable elastic means can be disposed in the linkage of at least one actuatable shifting element. Also, the at least one additional presettable elastic means or the additional element with the presettable elastic means can be disposed in the support region for an actuating element.
A linkage is any connection between two elements. The linkage can be disposed within the power transmitting path or in the area of a support, for example, a bearing. The support may be an axial support of a rotatable element or a rotatable support of a displaceable element.
It may be of advantage if the additional at least one elastic element with a presettable elasticity is disposed in the power transmitting path between the at least one actuating element and the at least one shifting element disposed at the transmission side; or, between the drive unit and the at least one actuating element.
Also, the apparatus of the invention provides a driving connection between the at least one actuatable shifting element on the transmission side and the at least one drive unit wherein, in the power transmitting path of the driving connection between the drive unit and the at least one shifting element, there is disposed an actuating element which is movable in relation to the elastic element by way of at least one elastic element or by way of an additional element.
It can be of an advantage if an actuating element in the power transmitting path between the drive unit and the transmission-internal shifting elements is moved axially and/or rotated with respect to at least one elastic element. The driving connection includes at least two elements which can be moved axially and/or rotated in relation to at least one elastic means.
In accordance with a further novel concept, it can be of advantage if the at least one elastic means is arranged between an axially movable and/or rotatable element for operating transmission-internal shifting elements and a moveable or stationary element.
The driving connection may include at least two elements which can be moved axially and/or rotated in relation to at least one elastic means, and these at least two elements form at least one support for the elastic means wherein the elastic means is supported under force load.
It can be of advantage if the at least two elements which are moveable with respect to each other can be moved with respect to each other by force-loading the elastic means. Although these two elements can be moved with respect to each other, they can be limited in their relative movement by the force-load of the elastic means. However, it may also be of advantage if the relative movement between the two elements is not restricted.
Furthermore, it can be of advantage if a slip clutch provides a substantially unrestricted relative moveability between the at least two elements.
It can also be of advantage if the elements are moved with respect to each other only after at least one of the elastic means has been biased with a certain presettable force. The ela
Esly Norbert
Fischer Robert
Hirt Gunter
Rogg Andreas
Darby & Darby
LuK Getriebe-Systeme GmbH
Wright Dirk
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