Apparatus for producing a frictional and/or form-fitting connection between two components which are arranged such that they can be moved linearly or rotated relative to one another

An apparatus for producing a frictional and/or form-fitting connection between components which are movable linearly or rotated relative to one another for transmitting forces and/or force moments that act between the components in a linear and/or rotational manner, wherein the first component surrounds the second component with at least one inner wall facing the second component, wherein:

• the second component includes elongated active face elements which are pivotable about a common rotational axis or about separate rotational axes that are parallel to one another in a region of one of the active-face elements and are moved in response to a force from a first position, in which the active-face elements are spaced apart from an inner wall, into a second position, in which the active-face elements produce the frictional and/or form-fitting connection with the inner wall, at least one mechanical stressing element connected to the active-face elements and exerting a restoring force acting between the active-face elements and holding the active-face elements in the first position, a kinematic system acting upon the active-face elements to provide a force opposite to the restoring force which is driven exclusively by a converter material, and wherein the kinematic system is connected to the active-face elements at ends of the active-face element and transfers the active-face element into the second position;
• and wherein
• an extension disposed on one active-face element and extending in a direction toward another active-face element;
• and
• a wire or strip of converter material extending between the extensions which changes shape when supplied with energy, so that the extensions and active-face elements move in opposite directions in space to cause the active-face elements to be transferred into the second position.

An apparatus for producing a frictional and/or form-fitting connection between components which are movable linearly or rotated relative to one another for transmitting forces and/or force moments that act between the components in a linear and/or rotational manner, wherein the first component surrounds the second component with at least one inner wall facing the second component, wherein:

• the second component includes elongated active face elements which are pivotable about a common rotational axis or about separate rotational axes that are parallel to one another in a region of one of the active-face elements and are moved in response to a force from a first position, in which the active-face elements are spaced apart from an inner wall, into a second position, in which the active-face elements produce the frictional and/or form-fitting connection with the inner wall, at least one mechanical stressing element connected to the active-face elements and exerting a restoring force acting between the active-face elements and holding the active-face elements in the first position, a kinematic system acting upon the active-face elements to provide a force opposite to the restoring force which is driven exclusively by a converter material, and wherein the kinematic system is connected to the active-face elements at ends of the active-face elements and transfers the active-face elements into the second position;
• and wherein
• the active-face element ends are spaced apart from one another by a gap;
• a non-circular contour is rotatable about a rotational axis is disposed within the gap and is contacted by the active-face element ends on opposite sides;
• and
• a lever arm, with one part attached to the contour, is coupled to a wire or strip of converter material which is connected to the second component and another part of the lever arm is coupled to a stressing element connected to the second component, and the wire or the strip of converter material changes shape when supplied with energy to cause the contour to rotate to cause a distance between the active-face element ends to increase to transfer the active-face elements into the second position.