# US 11,306,781 B2 · Slewing bearing with sealing arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,781 B2 - Document ID: US11306781B2 - Status: Granted - Kind: B2 - Application number: 17/174,635 - Filed: 2021-02-12 - Published: 2021-06-03 - Granted: 2022-04-19 - Earliest claimed: 2018-04-24 - Assignees: Aktiebolaget Skf - Applicants: Aktiebolaget Skf - Inventors: Juliette Delaby; Herve Dondaine - Web page: https://patentgrep.com/patent/US11306781B2 ## CPC - F16C 33/7896: {with two or more discrete sealings arranged in series} - F16C 19/10: for axial load mainly - F16C 19/18: with two or more rows of balls - F16C 19/181: {with angular contact} - F16C 33/586: {outside the space between the races, e.g. end faces or bore of inner ring} - F16C 33/7823: {of sealing lips} - F16C 33/783: {of the mounting region} - F16C 33/7866: {with sealing lips} - F16C 33/7886: {mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race} - F16C 33/7889: {mounted to an inner race and extending toward the outer race} - F16C 19/166: {Four-point-contact ball bearings} - F16C 33/581: {integral with other parts, e.g. with housings or machine elements such as shafts or gear wheels} - F16C 2208/10: Elastomers; Rubbers - F16C 2233/00: Monitoring condition, e.g. temperature, load, vibration - F16C 2300/14: Large applications, e.g. bearings having an inner diameter exceeding 500 mm - F16C 2326/30: Ships, e.g. propelling shafts and bearings therefor - Y02E 10/30: Energy from the sea, e.g. using wave energy or salinity gradient - F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A slewing bearing includes first and second rings and rolling elements therebetween. The first ring has a shoulder, and a cap is fixed to the first ring that, with the shoulder, defines a radially outwardly facing circumferential groove. A sealing contact member is fixed to a surface of the second ring. A first seal is mounted in the groove, and a sealing member is mounted on the cap. The first seal and the sealing member each include a sealing lip in sliding frictional contact with the sealing contact member. ## Claims ### Claim 1 A slewing bearing comprising: a first ring having a shoulder, a cap fixed to the first ring and defining with the shoulder a radially facing circumferential groove, the cap including a circumferential slot on a frontal surface and a cap sealing member having an annular heel mounted in the circumferential slot, the cap sealing member having a sealing lip, a second ring, a sealing contact member fixed to a surface of the second ring at a joint, at least one row of rolling elements arranged between the first ring and the second ring and not axially overlapping the sealing contact member, and a first seal having an annular heel and a sealing lip, the annular heel of the first seal being mounted in the circumferential groove, wherein the first ring and the second ring are configured for relative rotation around a rotation axis, wherein the sealing lip of the cap sealing member is in sliding frictional contact with a first surface portion of the sealing contact member, and wherein the sealing lip of the first seal is in sliding frictional contact with a second surface portion of the sealing contact member. ### Claim 2 (depends on 1) The slewing bearing according to the claim 1, including a second seal having an annular heel and a sealing lip, the annular heel of the second seal being mounted in the circumferential groove, wherein the shoulder includes an annular axial collar for blocking radial movement of the second seal. ### Claim 3 (depends on 2) The slewing bearing according to claim 2, wherein the cap is provided with an annular axial collar that blocks the radial movement of the first seal, wherein the sealing contact member is fixed to the second ring by a plurality of screws, wherein the cap is fixed to the first ring by a plurality of screws, and wherein the screws are covered by mastic. ### Claim 4 (depends on 2) The slewing bearing according to claim 2, wherein the cap is provided with an annular axial collar that blocks the radial movement of the first seal, wherein the sealing contact member is fixed to the second ring by a plurality of screws, wherein the cap is fixed to the first ring by a plurality of screws, and wherein the screws are covered by mastic. ### Claim 5 (depends on 1) The slewing bearing according to claim 1, wherein the cap is provided with an annular axial collar for blocking radial movement of the first seal. ### Claim 6 (depends on 1) The slewing bearing according to claim 1, wherein the heel of the cap sealing member is provided with at least one through hole. ### Claim 7 (depends on 1) The slewing bearing according to the claim 1, wherein the sealing contact member is fixed to the second ring by a plurality of screws. ### Claim 8 (depends on 1) The slewing bearing according to claim 1, wherein the cap is fixed to the first ring by a plurality of screws. ### Claim 9 (depends on 8) The slewing bearing according to claim 8, wherein the screws are covered by mastic. ### Claim 10 (depends on 1) The slewing bearing according to claim 1, wherein the first surface portion of the sealing contact member faces axially and the second surface portion of the sealing contact member faces radially. ### Claim 11 A slewing bearing comprising: a first ring having a shoulder, a cap fixed to the first ring and defining with the shoulder a radially facing circumferential groove, the cap including a circumferential slot on a frontal surface and a cap sealing member having an annular heel mounted in the circumferential slot, the cap sealing member having a sealing lip, a second ring, a sealing contact member fixed to a surface of the second ring at a joint, at least one row of rolling elements arranged between the first ring and the second ring, a first seal having an annular heel and a sealing lip, the annular heel of the first seal being mounted in the circumferential groove, and a second seal having an annular heel and a sealing lip, the annular heel of the second seal being mounted in the circumferential groove, wherein the first ring and the second ring are configured for relative rotation around a rotation axis, wherein the sealing lip of the cap sealing member is in sliding frictional contact with a first surface portion of the sealing contact member, wherein the sealing lip of the first seal is in sliding frictional contact with a second surface portion of the sealing contact member, and wherein the sealing lip of the second seal is in sliding frictional contact with the second ring. ### Claim 12 (depends on 11) The slewing bearing according to claim 11, including a third seal having an annular heel and a sealing lip, the annular heel of the third seal being mounted in the circumferential groove, wherein the third seal is located between the first seal and the second seal, and wherein the sealing lip of the third seal is in sliding frictional contact with a third surface portion of the sealing contact member. ### Claim 13 (depends on 12) The slewing bearing according to claim 12, wherein the shoulder includes a first annular axial collar for blocking radial movement of the second seal, and wherein the cap includes a second annular axial collar for blocking radial movement of the first seal. ### Claim 14 A slewing bearing comprising: a first ring having a shoulder, a cap fixed to the first ring and defining with the shoulder a radially facing circumferential groove, the cap including a circumferential slot on a frontal surface and a cap sealing member having an annular heel mounted in the circumferential slot, the cap sealing member having a sealing lip, a second ring, a sealing contact member fixed to a surface of the second ring at a joint, at least one row of rolling elements arranged between the first ring and the second ring, and a first seal having an annular heel and a sealing lip, the annular heel of the first seal being mounted in the circumferential groove and radially spaced from the second ring, wherein the first ring and the second ring are configured for relative rotation around a rotation axis, wherein the sealing lip of the cap sealing member is in sliding frictional contact with a first surface portion of the sealing contact member, and wherein the sealing lip of the first seal is in sliding frictional contact with a second surface portion of the sealing contact member. ### Claim 15 (depends on 14) The slewing bearing according to the claim 14, including a second seal having an annular heel and a sealing lip, the annular heel of the second seal being mounted in the circumferential groove and radially spaced from the second ring, wherein the shoulder includes an annular axial collar for blocking radial movement of the second seal. ### Claim 16 (depends on 14) The slewing bearing according to claim 14, wherein the cap is provided with an annular axial collar for blocking radial movement of the first seal. ### Claim 17 (depends on 14) The slewing bearing according to claim 14, wherein the heel of the cap sealing member is provided with at least one through hole. ### Claim 18 (depends on 14) The slewing bearing according to the claim 14, wherein the sealing contact member is fixed to the second ring by a plurality of screws. ### Claim 19 (depends on 14) The slewing bearing according to claim 14, wherein the cap is fixed to the first ring by a plurality of screws. ### Claim 20 (depends on 19) The slewing bearing according to claim 19, wherein the screws are covered by mastic.