Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Technische Universitat Darmstadt

David Flaschenträger

Tobias Melz

Björn Seipel

Jan Christoph Hansmann

Thorsten Koch

Eberhard Abele

Matthias Rauschenbach

Jakob Fischer

Hanns Stoffregen

Hanns A Stoffregen

The invention is an actuator which includes at least one control element which has thermally activatable transducer material and which, in response to the supply or dissipation of energy, changes from a first shape state into a second shape state, and a mechanical energy storage, which is functionally connected to the control element. When the control element is in the second shape state, it exerts a restoring force on the control element which returns the control element to the first shape state. The mechanical energy storage includes an elastomer body, which at least in some regions is in direct physical and thermal contact with the control element. The elastomer body is connected in a spatially fixed manner to the control element in at least two spatially separated joining regions along the control element.

Actuator having at least one control element which has thermal transducer material

A shaft arrangement is disclosed for transmitting torques acting around a rotational axis, with a variably adjustable torsional stiffness acting around the rotational axis and a method for varying the torsional stiffness of a shaft arrangement. The invention includes a first shaft section, having at least one torsion element secured thereto which is not damaged by torque and is axially fixed manner, which is mounted to be dimensionally stable transverse to the rotational axis, a second shaft section spaced axially apart from the first shaft section, to which the at least one torsion element is secured which is not rotatable but is axially movable and that a means for operatively interacts or can be made to operatively interact with the second shaft section for axially moving the second shaft section in relation to the first shaft section and in relation to the at least one torsion element.

Shaft arrangement and method for relaying torques acting around a rotational axis

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Darmstadt, Germany

David Flaschenträger