Ball-bearing-supported attachment point

{
  "publication_number": "US9816550B2",
  "country": "US",
  "kind": "B2",
  "title": "Ball-bearing-supported attachment point",
  "abstract": "The invention relates to an attachment point (1) comprising a connecting element (3) which comprises a section (5) for connecting an attachment device, a seat (9) for a fastening device (11) and at least one pair of rolling bearings (23) between the seat (9) and the connecting element (9), wherein the connecting element (3) is rotatable relative to the seat (9) and wherein the rolling bearings (25, 27) of the pair of rolling bearings each comprise at least one rolling element (29). In order to provide an attachment point that exhibits little wear, is easily rotated also when lifting heavy loads and is easy to install, it is according to the invention provided that the rolling bearings (25, 27) of the pair of rolling bearings (23) comprise an outer race (39, 41) attached to the connecting element (3).",
  "claims": [
    "1. Attachment point (1) comprising a connecting element (3) which comprises a section (5) for connecting an attachment device, a seat (9) through which a fastening device (11) can be guided, and at least one pair of rolling bearings (23) between said seat (9) and said connecting element (3), wherein said connecting element (3) is rotatable relative to said seat (9) and wherein the rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise at least one rolling element (29), wherein said rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise an outer race (39, 41) attached to said connecting element (3), characterized in that said seat (9) comprises at least one bushing (13, 15) which forms an inner race (31, 33) for at least one rolling bearing (25, 27) of said pair of rolling bearings (23), wherein said inner race (31, 33) encloses said at least one spherical rolling element (29) of said rolling bearing (25, 27) by more than 90°.",
    "2. Attachment point (1) according to claim 1, characterized in that said rolling bearings (25, 27) each comprise said at least one spherical rolling element (29) which is, by said outer race (39, 41), enclosed by more than 90°.",
    "3. Attachment point (1) according to claim 1 or 2, characterized in that a radial width (55) of said outer race (39, 41) of at least one rolling bearing (25, 27) corresponds to a radial dimension (57) of the rolling element (29) abutting said outer race (39, 41).",
    "4. Attachment point (1) according to claim 1, characterized in that said outer race (39, 41) of said at least one rolling bearing (25, 27) comprises an undercut (34, 36) in which said at least one rolling element (29) of said rolling bearing (25, 27) is supported in a positive-fit manner.",
    "5. Attachment point (1) according to claim 4, characterized in that said at least one undercut (34, 36) forms a track (35, 37) for said at least one rolling element (29).",
    "6. Attachment point (1) according to claim 1, characterized in that said inner race (31, 33) of said at least one rolling bearing (25, 27) comprises an undercut (42, 44) in which said at least one rolling element (29) of said rolling bearing (25, 27) is supported in a positive-fit manner.",
    "7. Attachment point (1) according to claim 6, characterized in that said at least one undercut (42, 44) forms a track (43, 45) for said at least one rolling element (29).",
    "8. Attachment point (1) according to claim 1, characterized in that said seat (9) comprises two bushings (13, 15) that are axially connected via a press-fit connection (17) and each comprise said inner race (31, 33).",
    "9. Attachment point (1) according to claim 8, characterized in that said outer race (39, 41) is at least one bushing (13, 15) captively supported via said at least one rolling element (29).",
    "10. Attachment point (1) according to claim 8, characterized in that at least one of said two bushings (13, 15) of said seat (9) comprises an inner thread (71) and said seat (9) further comprises a drive mechanism that is rotatably drivable by positive-fit engagement with said inner thread (71) and accessible from outside the seat (9).",
    "11. Attachment point (1) according to claim 8, characterized in that a braking member (65) is disposed between said seat (9) and said connecting element (3) and connects said seat (9) and said connecting element (3) in a frictionally engaged manner.",
    "12. Attachment point (1) according to claim 11, characterized in that said braking member (65) forms a sealing element (63) of said rolling bearing (25, 27).",
    "13. Attachment point (1) according to claim 11, characterized in that said braking member (65) is arranged in the area of the press-fit connection (17) between said seat (9) and said connecting element (3).",
    "14. Attachment point (1) according to one of the claim 1, characterized in that said at least one rolling bearing (25, 27) of said pair of rolling bearings (23) is a solid ball.",
    "15. Attachment point (1) comprising a connecting element (3) which comprises a section (5) for connecting an attachment device, a seat (9) for a fastening device (11) and at least one pair of rolling bearings (23) between said seat (9) and said connecting element (9), wherein said connecting element (3) is rotatable relative to said seat (9) and wherein the rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise at least one rolling element (29), wherein said rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise an outer race (39, 41) attached to said connecting element (3), wherein said seat (9) comprises two bushings (13, 15) that are axially connected via a press-fit connection (17) and each comprise an inner race (31, 33) for at least one rolling bearing (25, 27) of, wherein said inner races (31, 33) each enclose at least one spherical rolling element (29) of said rolling bearing (25, 27) by more than 90°, characterized in that one of the bushings (13, 15) is provided with an inner thread (71) and with a drive mechanism that is rotatably drivable by positive-fit engagement and accessible from the outside.",
    "16. Attachment point (1) comprising a connecting element (3) which comprises a section (5) for connecting an attachment device, a seat (9) for a fastening device (11) and at least one pair of rolling bearings (23) between said seat (9) and said connecting element (9), wherein said connecting element (3) is rotatable relative to said seat (9) and wherein the rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise at least one rolling element (29), wherein said rolling bearings (25, 27) of said pair of rolling bearings (23) each comprise an outer race (39, 41) attached to said connecting element (3), characterized in that said seat (9) comprises two bushings (13, 15) that are axially connected via a press-fit connection (17) and each comprises an inner race (31, 33), wherein said inner race (31, 33) encloses at least one spherical rolling element (29) of said rolling bearing (25, 27) by more than 90°.",
    "17. Attachment point (1) according to claim 16, characterized in that an outer race (39, 41) is at least one bushing (13, 15) captively supported via at least one rolling element (29).",
    "18. Attachment point (1) according to claim 16, characterized in that said seat (9) comprises a bushing (13, 15) with an inner thread (71) and a drive mechanism that is rotatably drivable by positive-fit engagement and accessible from the outside."
  ],
  "description_excerpt": "The invention relates to an attachment point comprising a connecting element which comprises a section for connecting an attachment device, a seat for a fastening device and at least one pair of rolling bearings between the seat and the connecting element, wherein the connecting element is rotatable relative to the seat and wherein the rolling bearings of the pair of rolling bearings each comprise at least one rolling element.\n\nAttachment points with rotatable connecting elements are known and are primarily used in lifting technology.\n\nAn attachment point with a connecting element for a fastening device rotatable relative to the seat is known from DE 100 13 845 C2. This German patent specification of the applicant describes an attachment point with a slide bearing. The slide bearing is formed by two bushings inserted into the connecting element. This attachment point provides a good load-carrying capacity, however, rotatability is limited, in particular with heavy loads.\n\nEuropean patent specification of the applicant EP 1 456 560 B1 describes an attachment point configured as a ring-bolt whose rotatability is improved by a pair of rolling bearings The attachment point provides good rotatability even when lifting heavy loads. It is disadvantageous, however, that the connection eye for connecting an attachment device is rigidly connected to a base of the attachment eye and can therefore not be pivoted out from an axis of the fastening device. Likewise disadvantageous is that this attachment point experiences great wear when lifting heavy loads.",
  "cpc": [
    "F16C 19/184",
    "B66C 1/66",
    "F16C 33/581",
    "F16G 15/08",
    "F16M 13/02"
  ],
  "ipc": [
    "A47B 96/06",
    "B66C 1/66",
    "F16C 19/18",
    "F16C 33/58",
    "F16G 15/08",
    "F16M 13/02"
  ],
  "assignees": [
    "RUD Kettenfabrik Rieger und Dietz GmbH and Co KG"
  ],
  "inventors": [
    "Simon Haas"
  ],
  "filing_date": "2014-03-26",
  "publication_date": "2017-11-14",
  "grant_date": "2017-11-14",
  "priority_date": "2013-03-28",
  "application_number": "US-201414779598-A",
  "family_id": "50389428",
  "cited_by_count": 0,
  "citations": [
    "FR543931A",
    "US1867574A",
    "US2651533A",
    "US3371951A",
    "EP0004830A1",
    "US5484220A",
    "US5806653A",
    "DE19644298A1",
    "DE10013845C2",
    "DE10196765B4",
    "DE10062971C1",
    "US20030095729A1",
    "US20050069379A1",
    "EP1456560B1",
    "DE10164598B4",
    "TW200301219A",
    "US8740275B2",
    "CN201670653U",
    "EP2495459A1",
    "US8757693B2",
    "DE202012100764U1",
    "US9193570B2",
    "US20130236340A1"
  ]
}