Driveshaft with a slidable coupling

A driveshaft assembly comprising:

• a rear shaft with a universal joint;
• an elongated front shaft, a first end of the front shaft rotationally connected to a yoke;
• a retaining element being engaged from a connection end of the front shaft in a co-rotating manner, wherein the connection end is a second end of the front shaft, and a gear part is located at a vicinity of the connection end of the front shaft;
• and
• a coupling device secured to the second end of the front shaft by means of the retaining element characterized by the gear part extending onto the connection end and the retaining element having a sleeve fit to the gear part in an axially slidable manner,
• wherein the coupling device has a flat flexible body on which a plurality of coupling elements is disposed, each of a set of coupling elements among the plurality of coupling elements is secured to the retaining element at an arm extending radially outwardly from a center of the retaining element, the flat flexible body provides a rotatable bearing and partially absorbs vibrations from the set of coupling elements to the retaining element by means of its flexible structure,
• wherein the vibrations coming axially to the coupling device in a direction of an axis of rotation are both partially damped by the flat flexible body of the coupling device to which each arm is directly connected, and are compensated by forward or reverse axial movement of the arm on the axis of rotation by vibration or impact, before the sleeve advances on the gear part without being transmitted to the front shaft, the sleeve transmits torque from the connection end to the front shaft via the gear part without being affected by axial vibration or impact;
• and rotational movement of the front shaft is transferred to the rear shaft and the torque from one end of the driveshaft assembly is transferred to the other end by rotation of the universal joint via the yoke.