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AssigneeS.N.R. Roulements
InventorsJean-Michel Beauprez, Fabien Corlet, Ludovic Saunier
Estimating the term…
A bump stop device comprises a bearing 20 provided with two bottom 22 and top 24 metal washers between which rolling bodies 26 are arranged. A friction ring 34 is fixed to the first of the bottom and top metal washers and rubs against the other metal washer in order to create a static frictional torque that is greater than that of the rolling bodies and, in practice, greater than 1 Nm. The friction ring 34 makes it possible to generate a controlled resisting torque that limits the transmission to the steering column of the torque generated when driving the vehicle on a convex road.
A bump stop comprising:
A bump stop bearing comprising:
A bump stop bearing comprising:
A bump stop bearing comprising:
A bump stop comprising
A bump stop comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
With bearing balls essentially of the same size in one or more circular rows: for axial load mainly
Characterised by the mounting on the vehicle body or chassis of the spring and damper unit: specially adapted for MacPherson strut-type suspension
Parts of ball or roller bearings: ball cages
Shafts: other accessories
About 2 years 4 months of term left · ends 16 Feb 2029 (estimated)
This application claims the priority of French Application No. 0610226, filed Nov. 22, 2006, the entire specification, claims and drawings of which are incorporated herewith by reference.
The invention relates to a bump stop for a suspension strut of a vehicle steering wheel, in particular for a telescoping suspension strut of an automobile vehicle steering wheel.
Under certain conditions of use, in particular when the vehicle is designed for use on convex roads, the ideal frictionless bump stop continuously transmits a torque that needs to be corrected to the steering column, resulting in driving inconvenience for the driver and constant energy consumption due to the continuous activation of the steering power assistance.
Further advantages and characteristics will emerge more clearly from the following description of specific embodiments of the invention, provided as non-limiting examples, and shown in the appended drawings, wherein:
FIG. 1 shows, in an axial cross-section, a stop of a MacPherson strut according to one embodiment of the invention;
FIG. 2 shows an axial cross-section of a friction ring of the stop of FIG. 1;
In reference to FIG. 1, a telescoping suspension strut comprises, in a known manner, a coil spring 10, a telescoping shock absorber and a shock-absorber buffer, not shown, these elements being arranged between a wheel and a bump stop 16 acting as an interface with the body of a vehicle. The spring comes to rest against the bottom annular wall 12 of a mount 14 made from a synthetic material, the top wall 18 of which acts as a seat for a roller bearing 20.
The bearing 20 consists of a bottom washer 22 and a top washer 24, both made from pressed steel and forming radial angular-contact raceways for rolling bodies such as balls 26. The bearing 20 thus defines an axis of rotation of the stop 16. The top washer 24 is supported on the bottom of a cover 28. The bottom washer 22 is supported on a support area forming a raised positioning pattern on the top surface 18 of the mount 14.
The cover 28 delimits with the mount 14 a housing for the bearing 20. The cover 28 is provided with a skirt 30 covering without contact a peripheral area of the mount 14 and thus delimiting an annular labyrinth 32 connecting the housing to the outside.