Suspension bump stop and strut device

Abstract

The suspension bump stop device comprises a rolling bearing (44) that forms an axial bump stop, equipped with an upper ring (46), with a lower ring (48) and with a plurality of rolling elements positioned between the rings, the upper and lower rings being supported respectively by an upper cup (40) and a lower cup (42), the lower cup forming a bearing means for a suspension spring (18), at least one sealing lip being provided on one of the cups so that it bears against a bearing surface portion of the other cup. The bearing surface portion is substantially cylindrical, the sealing lip being directed downwards away from the rolling bearing and bearing with radial interference against the said surface portion, the said substantially cylindrical surface portion being connected towards the top to a shoulder against which the lip can bear if the two cups become radially eccentric relative to one another.

Description

technical field [0001] The present invention relates to the field of suspension bumper devices, in particular suspension bumper devices for use in suspension struts of steering wheels in motor vehicles. [0002] More specifically, the present invention relates to a suspended bumper device comprising an upper ring and a lower ring with rolling elements, such as balls or rollers, disposed between them. The upper and lower rings are typically mounted in contact with the lower and upper carriers or supports, eg, with the lid or cup. The upper support cup and the lower support cup form a housing for the ring of the rolling bearing and provide an interface between said ring and the surrounding element. Background technique [0003] The suspension buffer block is arranged on the upper part of the suspension strut between the vehicle shell and the suspension spring. The spring is mounted around the piston rod of the shock absorber, and its end is connected to the vehicle shell via...

AI Technical Summary

Problems solved by technology

However, the suspended bumper in this document has the disadvantage that only a simple narrow channel is provided between the upper cover and the lower support cover supporting the rolling bearing in order to seal the bumper

[0009] As a result, under certain conditions, for example, when the vehicle is driven along a muddy road, or optionally when the vehicle is washed with a high-pressure water jet, there may be an ingress of water into the rolling bearing, which has a detrimental effect on the life of the bearing

[0010] Furthermore, in case of eccentric loads like the device illustrated in patent application FR 2 783 204 as described above, the seals provided on the cups can no longer come into contact with their support surfaces, at least in certain areas, and therefore Reduced tightness

[0011] In order to solve this problem, it is possible to increase the radial geometric interference between the lip and its supporting surface, but its disadvantage is to increase the friction torque of the bumper excessively

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