Thrust suspension strut and provided with such a stop

A spring strut of a vehicle is provided with a coil spring (10) and a telescopic shock absorber and a bump stop. The stop comprises a thrust bearing (24), an upper supporting element (18) for transmitting the efforts of the telescopic damper and bearing to a superstructure of the vehicle, a lower support element (38) of synthetic material to transmit to the washer below the forces exerted by the spring, a cover (22) protecting the bearing and disposed between the upper washer and the upper supporting member, and a filtration unit (32, 60) of vibration spring. The bearing is provided with a lower washer (28) rotating with respect to an upper washer (26). The cover (22) is disposed between the upper washer and the upper support element and defines with the lower support element a housing for the bearing. The filtration unit is arranged between the upper washer and the cover or built into the cover.