Shaft connection

A shaft connection for a longitudinal shaft assembly of a motor vehicle, comprising:

• at least one first shaft having a first end and a second end, and a second shaft, disposed so as to be coaxial with the first shaft, having a first shaft end and a second shaft end;
• wherein the first and second shafts extend along an axial direction;
• wherein the first end forms a hollow portion;
• wherein the first shaft end includes a detent having a detent diameter larger than a smallest diameter of the hollow portion;
• wherein the first shaft end forms a first journal having a displacement portion positioned between the detent and the second shaft end;
• wherein the first shaft end at least in an initial position of the shaft connection extends through the hollow portion, and the hollow portion by way of the displacement portion along the axial direction forms a guide portion and in a circumferential direction forms a form-fitting first connection;
• wherein in the initial position a mutual displacement of the first shaft and the second shaft, along the axial direction, is prevented by an axial securing feature;
• wherein in the event of a crash the axial securing feature is releasable by way of a release force that acts in the axial direction, and the first shaft is displaceable along the axial direction in relation to the second shaft;
• wherein, proceeding from the initial position, guiding by the guide portion is guaranteed in the case of an elongation as well as in the case of a compression of the shaft connection;
• wherein the detent is positioned inside the first shaft which, for delimiting the mutual displacement in the case of an elongation of the shaft connection, interacts with the first shaft.

A shaft connection for a longitudinal shaft assembly of a motor vehicle, comprising:

• at least one first shaft having a first end and a second end, and a second shaft, disposed so as to be coaxial with the first shaft, having a first shaft end and a second shaft end;
• wherein the first and second shafts extend along an axial direction;
• wherein the first end forms a hollow portion;
• wherein the first shaft end forms a first journal having a displacement portion;
• wherein the first shaft end at least in an initial position of the shaft connection extends through the hollow portion, and the hollow portion by way of the displacement portion along the axial direction forms a guide portion and in a circumferential direction forms a form-fitting first connection;
• wherein in the initial position a mutual displacement of the first shaft and the second shaft, along the axial direction, is prevented by an axial securing feature;
• wherein in the event of a crash the axial securing feature is releasable by way of a release force that acts in the axial direction, and the first shaft is displaceable along the axial direction in relation to the second shaft;
• wherein, proceeding from the initial position, guiding by the guide portion is guaranteed in the case of an elongation as well as in the case of a compression of the shaft connection;
• wherein a dynamic release force for the elongation has an impulse energy of 10 to 1,000 Joules;
• and
• wherein a constant velocity rotary joint having a joint internal part, a joint external part, and roller members disposed therebetween is disposed on the second shaft end, said roller members in the operation of the shaft connection being mutually disposed in a functional position;
• and wherein the release force required for releasing the axial securing feature is lower than a force which is required for releasing the functional position;
• or
• wherein the axial securing feature comprises an elastically deformable securing ring which in the initial position is positioned in a first groove that is disposed in the hollow portion and in a second groove that is disposed in the displacement portion such that the securing ring in the axial direction forms a form-fitting second connection of the first shaft to the second shaft.