A LOW FRICTION PROJECTION SCREENING FOR ROLLING BEARINGS

Abstract: Shields made of plate and plastic or elastome­ ric materials have a plane surface which forms a seal with the inner ring. The inner surface (17) of the ring (11) with which the shields (14) form a seal has recesses (19) along the sections in which the seal are formed, which define pockets between the surface of the ring and the surface of the shield; the pockets serve as containers for the foreign bodies which penetrate through the seal and for the grease which tends to come out through this latter.

Description: This invention relates to a protection screening for rolling bearings. The term screened indicates a rolling bearing provided on its faces with thin screens made of plate, plastics or of a combination of such materials, said screens are forced into the grooves formed in the fixed race of the bearing and form with the mobile race a labyrinth seal; the purpose of the screens is to prevent the entry of foreign matters into the bearing and to retain in its interior the soap grase introduced during the construction. The object of the invention is to provide a particularly efficient screening for the purposes for which it is intended, as indicated hereinabove, in the case in which the screen is made of a compound of plate and plastics. For attaining these objects the invention proposes to provide a low protection screening for rolling bearings, characterized in that the inner surface of the race of the bearing with which the screens form a labyrinth seal is provided with recesses along the portions in which said seals are formed thus providing pockets between the surface of the race and the surface of the screen disposed in face of it. The subject-matter of the invention will now be described with reference to the annexed drawing which partially illustrates in a sectional view a rolling bearing provided with a screening according to the invention. A rolling bearing of a known type has an outer race 10, an inner race 11, balls 12, a cage 13 and screens 14 made of a composition of elastomeric or plastic materials 15 and plate 16. According to the invention, a recess 19 is formed in the portion of surface 17 facing the lip 18 of the screen 14, which forms the seal. The purpose of said recess is to provide a pocket intended to contain and retain both the foreign bodies which could penetrate through the seald 17-18, and the grease contained within the interior of the bearing and which tends to come out yet through the seal 17-18 during operation of the bearing itself.

Claims: A low friction protection screening for rolling bearings, characterized in that the inner surface of the race of the bearing with which the screens form a labyrinth seal is provided with recesses along the portions in which said seals are formed thus providing pockets between the surface of the race and the surface of the screen disposed in face of it. 2. A screening as claimed in Claim 1, characterized in that the recesses have a longitudinal extension smaller than the lenght of the seal between the screen and the surface of the respective race. 3. A screening as claimed in the preceding Claims, as described and illustrated hereinabove with reference to the annexed drawings.

Inventors: BERMOND, GABRIELE, VIGNOTTO, ANGELO
Applicants: RIV-SKF OFFICINE DI VILLAR PEROSA S.P.A
Application year: 1987
Main classification: F16C33
IPC codes: F16C33