초록 ▼

The present invention is a bi-directional tapered roller bearing having a first cone rib ring thrust face "C" adjacent and facing the small diameter end faces of the roller elements, a second cone rib ring thrust face "B" adjacent and facing the large diameter end faces of the roller elements, and a

The present invention is a bi-directional tapered roller bearing having a first cone rib ring thrust face "C" adjacent and facing the small diameter end faces of the roller elements, a second cone rib ring thrust face "B" adjacent and facing the large diameter end faces of the roller elements, and a cup rib ring thrust face "A" adjacent and facing the large diameter end faces of the roller elements. The bearing components are arranged such that, during primary thrust load operation, there is a gap between thrust face C and the small diameter end faces of the roller elements, a gap between thrust face A and the large diameter end faces of the roller elements, and contact between thrust face B and the large diameter end faces of the roller elements. With this arrangement, bearing roller element centrifugal loads act to reduce the contact forces between the roller elements and the bearing races.

대표청구항 ▼

1. A bi-directional bearing for facilitating rotation about an axis, which is the bearing axis, said bearing constructed and arranged to operate under both primary axial thrust loads and reverse axial thrust loads, said bearing comprising:a cup having an annular race tapered such that said race has

1. A bi-directional bearing for facilitating rotation about an axis, which is the bearing axis, said bearing constructed and arranged to operate under both primary axial thrust loads and reverse axial thrust loads, said bearing comprising:a cup having an annular race tapered such that said race has a large diameter end and a small diameter end; a cone having an annular race spaced radially inwardly from said cup race, said cone race being tapered such that said cone race has a large diameter end and a small diameter end; a plurality of tapered rollers, each having a rolling surface, a small diameter end face at one end of said rolling surface, and a large diameter end face at the other end of said rolling surface, said roller elements being circumferentially spaced apart in a single row between said cup race and cone race and contacting said races along said rolling surfaces; a cup thrust rib ring fixed relative to said cup for carrying reverse axial thrust loads, said cup thrust rib ring having an annular thrust face "A" at said large diameter end of said cup race and extending radially inwardly therefrom, said large diameter end face of each of said roller elements being disposed adjacent and facing thrust face A; a first cone thrust rib ring fixed relative to said cone for carrying primary axial thrust loads, said first cone thrust rib ring having an annular thrust face "B" at said large diameter end of said cone race and extending radially outwardly therefrom, said large diameter end face of each of said roller elements being disposed adjacent and facing thrust face B; a second cone thrust rib ring fixed relative to said cone for carrying reverse axial thrust loads, said second cone thrust rib ring having an annular thrust face "C" at said small diameter end of said cone race and extending radially outwardly therefrom, said small diameter end face of each of said roller elements being disposed adjacent and facing thrust face C, the distance between thrust faces B and C being greater than the length of said rollers; said bearing further constructed and arranged to have (i) said roller large diameter end faces moveable into load bearing contact with said thrust face B while being spaced from thrust face A upon the application of primary axial thrust loads on said cup and cone urging said cup race and cone race toward each other, and ii) said roller large and small diameter end faces moveable into load bearing contact with, respectively, thrust face A and thrust face C upon the application of reverse axial thrust loads on said cup and cone urging said cup race and cone race apart.