US 11,713,785 B2
Hub bearing assembly for discs for soil cultivation
Massimo Marivo, Airasca (IT); Stefano Urso, Bologna (IT); and Riccardo Venturucci, Turin (IT)
Assigned to AKTIEBOLAGET SKF
Filed by Aktiebolaget SKF, Gothenburg (SE)
Filed on Apr. 30, 2021, as Appl. No. 17/245,687.
Claims priority of application No. 102020000009991 (IT), filed on May 6, 2020.
Prior Publication US 2021/0348646 A1, Nov. 11, 2021
Int. Cl. F16C 33/78 (2006.01); F16C 19/18 (2006.01); A01B 71/04 (2006.01)
CPC F16C 33/7896 (2013.01) [A01B 71/04 (2013.01); F16C 19/185 (2013.01); F16C 33/7823 (2013.01); F16C 33/7883 (2013.01); F16C 33/7886 (2013.01); F16C 2310/00 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A hub bearing assembly configured for the rotatable mounting of a soil cultivating disc on a support shaft of an agricultural machine, the assembly comprising:
a hub bearing unit comprising an outer ring carrying two integral outer raceways for respective rows of rolling bodies, a flange fixed to the outer ring configured for mounting the disc, and, for each outer raceway, an inner ring axially adjacent to the other inner ring, both of which are configured to be engaged by the support shaft; and
a sealing device mounted on a side of the hub bearing assembly opposite the side of the flange,
wherein the sealing device comprises:
a first sealing stage and a second sealing stage arranged sequentially along the support shaft and housed in respective seats formed directly in the outer ring;
wherein the sealing device comprises an intermediate support ring radially configured to be interposed between the support shaft and the first sealing stage and the second sealing stage,
wherein each sealing stage comprises a rotatable part, fixed to the outer ring in the corresponding seat, and a fixed part mounted on the intermediate ring; each of said parts comprising a shield, and at least said rotatable parts carrying a respective seal of elastic material with at least one respective sealing lip;
wherein the intermediate support ring comprises, for each sealing stage, a respective mounting diameter, a first mounting diameter of the first sealing stage having a smaller size than the size of a second mounting diameter of the second sealing stage;
wherein the intermediate support ring comprises a lateral shield for protecting the first sealing stage and the second sealing stage, mounted on the intermediate support ring on a third mounting diameter having a smaller size than the size of the first mounting diameter of the first sealing stage.