Rolling bearing with seals and perforated spacer ring between said seals

Abstract

A rolling bearing having two seals 38 and an annular spacer ring 52 axially between the two seals 38. The seal has base 44 and sealing lip 46. The shim spacer has an axial hole 58 which may be a throu

Claims

1. Rolling bearing (1) comprising a first ring (10) and a second ring (12) capable of rotating concentrically relative to one another, and at least one row of rolling elements (22) arranged between first and second raceways (26, 30) of the said first and second rings, the first ring (10) comprising at least one first rolling ring (14) provided with said first raceway (26), and the second ring (12) comprising at least one second rolling ring (18) provided with said second raceway (30), the rolling bearing (1) further comprising at least two seals (38, 40) each having an annular heel (44) mounted on a cylindrical surface (14b) of the first ring (10) and a sealing lip (46) in frictional contact with the second ring, and at least one spacer ring (52) mounted on the first ring (10) and axially arranged between the annular heels (44) of the two seals (38, 40), characterized in that the spacer ring (52) comprises at least one axial hole (58).

2. Rolling bearing (1) according to claim 1, wherein the axial hole (58) is an axial through hole (58) opening on either side onto one of the seals (38, 40).

3. Rolling bearing (1) according to claim 1 or 2, wherein the axial hole (58) comprises a tapping.

4. Rolling bearing (1) according to any of the preceding claims 1 to 3, wherein the spacer ring (52) comprises at least two axial holes (58) positioned at diametrically opposed positions.

5. Rolling bearing (1) according to any of the preceding claims 1 to 4, wherein the spacer ring (52) comprises more than two axial holes (58), each axial hole (58) being equidistant from the two adjacent axial holes (58).

6. Rolling bearing (1) according to any of the preceding claims 1 to 5, wherein the spacer ring (52) comprises at least three dissociable segments (62) circumferentially adjacent forming said spacer ring (52), each segment comprising at least one axial hole (58).

7. Rolling bearing (1) according to claim 6, wherein each segment (62) comprises only one axial hole (58) positioned in the middle of the circumferential length of said segments (62).

8. Rolling bearing (1) according to claim 6, wherein each segment (62) comprises at least two axial holes (58), each axial hole (58) being positioned regularly along the circumferential length of each segment (62).

9. Rolling bearing (1) according to any of the preceding claims 1 to 8, comprising at least three seals (38, 40, 42) and two spacer rings (52) spaced apart from each other by one of the seals (38, 40, 42) which is interposed axially.

10. Rolling bearing (1) according to any of the preceding claims 1 to 9, wherein the spacer ring (52) comprises a flange (54) that radially outwardly projects towards the second ring (12), the flange (54) extending obliquely with a support surface inclined in the same direction as the sealing lip (46) of one of the seals (40), and an annular axial collar (56) that radially blocks the annular heel of the other seal (38) in a radial outwards direction.

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