Support interface and device for an engine casing

{
  "publication_number": "US10697327B2",
  "country": "US",
  "kind": "B2",
  "title": "Support interface and device for an engine casing",
  "abstract": "The invention relates to the field of support interfaces, and in particular to such a support interface (30 a, 30 b) for an engine casing (90) and comprising a coupling part (50), a first plurality of bolts (80), and a plurality of pegs (70). The coupling part (50) has an outer face (52) presenting a cavity (42) suitable for receiving a support arm (20 a, 20 b), and an inner face (51) suitable for being mounted on an outer face (93) of the engine casing (90), together with a first plurality of orifices (53) between the outer face (52) and the inner face (51) of the coupling part (50). Each bolt (80) has a threaded shank (82) received in an orifice (53) of the first plurality of orifices (53), and a head (81) suitable for bearing against the outer face (52) of the coupling part (50). Each peg (70) has a threaded orifice (71) in which the threaded shank (82) of one of the bolts (80) of the first plurality of bolts (80) is engaged through a first end of the peg (70), each peg having a second end that is enlarged and suitable for bearing against an inner face (92) of the engine casing (90).",
  "claims": [
    "1. A support interface for an engine casing, the support interface comprising: a coupling part having an outer face with a cavity suitable for receiving a support arm, and an inner face suitable for being mounted on an outer face of the engine casing, together with a first plurality of orifices between the outer face and the inner face of the coupling part; a first plurality of bolts, each having a threaded shank received in an orifice of the first plurality of orifices and a head suitable for bearing against the outer face of the coupling part; and a plurality of pegs, each peg of the plurality of pegs having a threaded orifice in which the threaded shank of one of the bolts of the first plurality of bolts is engaged through a first end of a respective peg, each peg also having a second end that is enlarged and suitable for bearing against an inner face of the engine casing.",
    "2. The support interface according to claim 1, wherein at least one orifice of said first plurality of orifices presents an inside surface complementary to an outside surface of the first end of a corresponding peg of the plurality of pegs.",
    "3. The support interface according to claim 2, wherein at least two orifices of said first plurality of orifices each present an axisymmetric inside surface that is complementary to the outside surface of the first end of the corresponding peg.",
    "4. The support interface according to claim 1, wherein the coupling part presents a second plurality of orifices, each orifice of the second plurality of orifices being threaded and opening out in the outer face of the coupling part.",
    "5. A support device having at least a first support interface according to claim 1, and a first support arm connected to a frame and having one end received in the cavity of the coupling part of the first support interface.",
    "6. The support device according to claim 5, wherein the coupling part presents a second plurality of orifices, each orifice of the second plurality of orifices being threaded and opening out in the outer face of the coupling part, the support device further comprising a second plurality of bolts connecting the first support arm to the coupling part through the orifices of the second plurality of orifices.",
    "7. The support device according to claim 5, including a second support interface, together with a second arm connected to the frame and having one end received in the cavity of the coupling part of the second support interface.",
    "8. An assembly comprising at least one engine casing and the support interface of claim 1, wherein the pegs are received in orifices going from an inner face to an outer face of the engine casing, the pegs having enlarged second ends bearing against the inner face of the engine casing.",
    "9. The assembly according to claim 8, wherein the pegs are received by being pressed into said orifices in the engine casing.",
    "10. A method of mounting the support interface according to claim 1 on the engine casing, the method comprising the following steps: inserting each of the pegs as far as its enlarged second end from an inner face of the engine casing into the orifices going from the inner face to the outer face of the engine casing; placing the coupling part with its inner face on the outer face of the engine casing and the orifices of the first plurality of orifices in alignment with the pegs; and engaging the threaded shanks of the first plurality of bolts through the first plurality of orifices into the threaded orifices of the pegs in order to hold the coupling part stationary relative to the engine casing.",
    "11. The support interface according to claim 1, wherein the cavity extends from the outer face of the coupling part towards the inner face of the coupling part.",
    "12. The support interface according to claim 1, wherein the first end of each peg of the plurality of pegs contacts the coupling part."
  ],
  "description_excerpt": "The present invention relates to a support interface. More particularly, the invention relates to a support interface for an engine casing, in particular for an aeroengine such as a turbojet or turbofan, and that is suitable for being used while the engine is being manufactured or maintained. The invention also relates to a support device including such an interface, to an assembly comprising an engine casing and such a support device, and also to a method of mounting such an interface on an engine casing. During engine assembly or handling, it is often necessary to hold the engine in a high position so as to give easier access to its various components. For that purpose, it is known to form at least two diametrically opposite cavities in the outer casing of an engine, and in particular of a turbine aeroengine, each of which cavities is to receive the end of a support arm secured to a frame. In order to hold the engine, a support arm is thus inserted into each cavity and is fastened to the casing, thereby holding the engine in a desired position.\n\nWith such a configuration, in order to ensure that each arm is well held, it is necessary for each cavity to present a working depth that is sufficient. In order to obtain such a depth, the casing is generally provided with local extra thicknesses, also referred to as “bulges”, with the cavities for receiving the arms being machined therein. Those extra thicknesses lead to a considerable increase in the weight of the engine.",
  "cpc": [
    "F01D 25/285",
    "B64F 5/50",
    "B66C 1/107",
    "F01D 25/24",
    "F05D 2220/32",
    "F05D 2230/60",
    "F05D 2240/14",
    "F05D 2240/90",
    "F05D 2260/31"
  ],
  "ipc": [
    "B64F 5/50",
    "B66C 1/10",
    "F01D 25/24",
    "F01D 25/28"
  ],
  "assignees": [
    "SAFRAN AIRCRAFT ENGINES"
  ],
  "inventors": [
    "DUBOIS MARGAUX JUSTINE EMMA",
    "CAETANO NELSON",
    "DEMOULIN ALEXANDRE CHRISTOPHE ADRIEN"
  ],
  "filing_date": "2016-09-15",
  "publication_date": "2020-06-30",
  "grant_date": "2020-06-30",
  "priority_date": "2015-09-17",
  "application_number": "US-201615760930-A",
  "family_id": "55236494",
  "citations": [
    "FR2990190A1",
    "US2012242100A1",
    "US2017166331A1",
    "US4202539A",
    "US6513781B1",
    "WO2015114276A1"
  ]
}