Locking device of a motor vehicle for securing a displaceable motor vehicle component

A locking device for securing a motor vehicle component which is displaceable relative to a motor vehicle structure and which is securable by the locking device within a displacement range in a position of rest, the locking device comprising:

• a first frictional element;
• and
• a second frictional element which is movable relative to the first frictional element and thereby slideable with a friction surface along a friction surface of the first frictional element under sliding friction conditions and wherein, in the position of rest of the motor vehicle component, the friction surface of the first frictional element bears against the friction surface of the second frictional element under static friction conditions,
• wherein the first frictional element and the second frictional element are pre-tensioned against one another in such a way that they tend to abut one another with their friction surfaces, and at least one of the first frictional element and the second frictional element is mounted in such a way that it is adjustable along an effective direction of pre-tensioning with respect to the other of the first frictional element and the second frictional element,
• wherein a flowable additional medium is provided which is configured to be brought, upon a relative movement of the frictional elements, between the friction surface of the first frictional element and the friction surface of the second frictional element,
• wherein the first frictional element comprises an inner wall facing the second frictional element, wherein the inner wall of the first frictional element is conically shaped and defines the friction surface of the first frictional element, and
• wherein the second frictional element is rotatable with respect to the first frictional element about an axis of rotation and comprises an outer wall facing the first frictional element and extending about the axis of rotation, wherein the outer wall is conically shaped and defines the friction surface of the second frictional element, the second frictional element having an upper circumferential edge bounding the outer wall at an upper side of the second frictional element and at a lower circumferential edge bounding the outer wall towards a lower side of the second frictional element,
• wherein at least one guide channel is provided at one of the first frictional element and the second frictional element, the at least one guide channel extending substantially along the effective direction of pre-tensioning, and being inclined at an angle to extend substantially parallel to the friction surface of the one of the first frictional element and the second frictional element, wherein the at least one guide channel extends longitudinally between the upper circumferential edge and the lower circumferential edge of the second frictional element and is open at the upper side of the second frictional element and at the lower side of the second frictional element.