• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Connecting rod (40) of adjustable length for an aircraft turbomachine (10), this connecting rod having a generally elongated shape and having two opposite longitudinal ends (42, 50) for fixing to elements to be connected, characterized in that: - a first (42) of these longitudinal ends is connected to a first threaded axis (44) screwed into a first tubular portion (46) of an adjusting sleeve (48), - a second (50) of these longitudinal ends is connected to a second threaded shaft (52) screwed into a second tubular portion (54) of the adjustment sleeve, and further comprising a housing (56) in which at least a portion of the first axis is configured to slide.
    公开号:FR3052828A1
    申请号:FR1655788
    申请日:2016-06-21
    公开日:2017-12-22
    发明作者:Mathieu Cladiere；Stephane Vergez
    申请人:Turbomeca SA；
    IPC主号:
    专利说明:

    Rod of adjustable length for turbomachine
    TECHNICAL AREA
    The present invention relates to a rod of adjustable length for an aircraft turbine engine such as a helicopter.
    STATE OF THE ART
    A helicopter turbine engine is conventionally mounted in a cell and attached to structural elements of the helicopter by connecting rods or the like. As is schematically represented in FIG. 1 for example, the turbomachine 10 is fixed at its front or upstream end to first longitudinal ends of connecting rods 12, 14 whose second opposite longitudinal ends are attached to a structural element 16 of the helicopter. A tripod or set of three connecting rods 12 connects a first side of the front end of the turbomachine 10 to the structural element 16, and a bipod or set of two connecting rods 14 connects a second opposite side of the front end of the turbomachine to the structural element 16. The rear end or downstream of the turbomachine 10 is connected to the structural element 16 by a substantially vertical rod 18 adjustable in length. This rod extends substantially to 6h by analogy with the dial of a clock. Its upper longitudinal end is fixed to an element of the turbomachine 10 and its lower longitudinal end is fixed to an inverted U-shaped arch 20 whose free ends are fixed on the structural element 16 of the helicopter. This U-shaped arch 20 defines a passage space for a shaft 22 for driving the tail rotor of the helicopter. The adjustment of the length of the rear connecting rod 18 makes it possible more or less to tilt the turbomachine 10 vis-a-vis the front rods 12, 14.
    In the current technique shown in Figure 2, a first longitudinal end 24 of the connecting rod 18 comprises a threaded hole for screwing an end portion 26 of a threaded shaft 28, and a second longitudinal end 30 of the connecting rod 18 comprises a tapped hole for screwing an opposite end portion 32 of the threaded axis 28. The axis 28 comprises a hexagon 34 between the end portions 28, 32, which is configured to cooperate with a tool such as a key to move in rotation and screw or unscrew the pin 28 vis-à-vis the ends 24, 30 of the connecting rod 18. The rotation of the axis 28 allows to translate the ends 24, 30 of the connecting rod , in order to bring them closer to one another or to move them away from one another and thus adjust the length of the connecting rod to a desired value.
    However, in practice, this technology is not entirely satisfactory because, although it allows to extend a rod to a desired maximum value, it does not shorten the same rod to a desired minimum value, for example necessary for its integration into space (here vertical) extending between the turbomachine 10 and the arch 20 (Figure 3). The adjustment range can also be relatively narrow vis-à-vis the length of the connecting rod. In a particular embodiment, the connecting rod has a length of 126mm, adjustable between -12mm and + 12mm (+/- 10%).
    The present invention provides a solution to this problem which is simple, effective and economical.
    SUMMARY OF THE INVENTION The invention proposes for this purpose a rod of adjustable length for an aircraft turbomachine, this rod having a generally elongate shape and having two opposite longitudinal ends for attachment to elements to be connected, characterized in that: a first of these longitudinal ends is connected to a first threaded shaft screwed into a first tubular portion of an adjustment sleeve; a second of these longitudinal ends is connected to a second threaded axis screwed into a second tubular portion of the socket; adjusting, and further comprising a housing in which at least a portion of the first axis is configured to slide.
    In the present application, the terms sliding or sliding must be understood as the displacement of an element in another element (here in this case the first axis in the housing of the second axis), without necessarily contact between these elements.
    Advantageously, the first axis can slide in the second axis. This makes it possible to increase the adjustment range of the connecting rod and / or to reduce its length to a relatively small value. In a particular embodiment of the invention, the rod has a length of 79mm, adjustable between -12mm and + 12mm (+/- 15%). The rod according to the invention also allows a significant weight gain compared to the prior art (about 35% in the particular case mentioned above).
    The connecting rod according to the invention may comprise one or more of the following features, taken separately from each other or in combination with each other: the first and second axes, the sleeve and the housing are coaxial, a first counter-effect nut is screwed onto the first axis and is adapted to bear on a free end of said first portion, and a second locknut is screwed on the second axis and is adapted to bear on a free end of said second portion ; these locknuts are tightened on the sleeve to immobilize the connecting rod to a determined length, - said longitudinal ends each comprise a housing in which is mounted a ball joint traversed by a fixing pin, - the first axis is cylindrical and the second axis is tubular, - the threads of the first and second axes are in opposite directions, - the threads of the first and second axes are in the same direction, but not different, - the rod is configured so that the first and second axes are movable towards each other, by rotation of the sleeve, from a first position in which the axes are at a distance from each other, to a second position in which the first axis is engaged in the second axis.
    The present invention also relates to an aircraft turbine engine, such as a helicopter, equipped with at least one connecting rod as described above.
    The present invention also relates to an aircraft, such as a helicopter, comprising a cell in which is mounted a turbomachine as described above, said connecting rod extending substantially vertically at 6 o'clock by analogy with the dial of a clock, its upper longitudinal end being attached to an element of the turbomachine and its lower longitudinal end being fixed to an inverted U-shaped hoop whose free ends are fixed on a structural element of the helicopter and which is traversed by a tail rotor shaft of the last.
    DESCRIPTION OF THE FIGURES The invention will be better understood and other details, characteristics and advantages of the invention will emerge more clearly on reading the following description given by way of nonlimiting example and with reference to the appended drawings in which: FIG. 1 is a partial schematic half-view in perspective of a helicopter-type aircraft equipped with a turbomachine; FIGS. 2 and 3 are diagrammatic perspective views of an adjustable connecting rod of the prior art, FIG. is a schematic view in axial section of a connecting rod according to the invention, - Figure 5 is a schematic exploded perspective sectional view of a connecting rod according to the invention, - Figures 6 and 7 are schematic views in axial section. and in perspective of the connecting rod of FIG. 4, and respectively show two extreme positions of adjustment of the connecting rod, and - FIG. 8 is a schematic view in perspective of the rod of Figure 4 in a mounting environment.
    DETAILED DESCRIPTION
    Figures 1 to 3 have been described in the foregoing and illustrate the prior art of the present invention.
    FIGS. 4 and following illustrate an embodiment of the connecting rod 40 according to the invention, in which: a first longitudinal end 42 of the connecting rod 40 is connected to a first threaded axis 44 screwed into a first tubular portion 46 of a adjusting sleeve 48, and - an opposite second longitudinal end 50 of the connecting rod is connected to a second threaded axis 52 screwed into a second tubular portion 54 of the sleeve 48, this axis 52 having a housing 56 in which at least a portion of the first axis 44 is configured to slide during the adjustment of the connecting rod. The threaded shaft 44 is integral with the first end 42 and is preferably formed in one piece with the latter. The first axis 44 has an elongated shape of axis A. Its thread extends over a major part of its length, to its free end opposite the end 42. This end 42 comprises a housing in which is mounted a ball 58 traversed by a screw 60. The end 42 is engaged between the two ears of a yoke 62 which comprises aligned mounting holes of the screw 60. Sockets 64 are mounted in the orifices of the yoke 62 and around the opinion. The screw 60 comprises a head which bears on one of the sleeves via a washer 66, and receives at its opposite end a nut 68 which bears on the other sleeve via a washer 70. The ball 58 associated with the fact that the thickness or axial dimension of the end 42 along the axis B of the screw 60 is less than the distance between the ears of the yoke 62 along the same axis B, allows inclinations of the axis 44 vis-à-vis a plane perpendicular to the axis B.
    In the same way, the threaded shaft 50 is integral with the second end 52 and is preferably formed in one piece with the latter. This axis 50 has an elongated shape along the axis A and is therefore coaxial with the axis 44. Its thread extends over a major part of its length, up to its free end opposite the end 52. This end 52 comprises a housing in which is mounted a ball 72 traversed by a screw 74. The end 52 is engaged between the two ears of a yoke 76 which comprises aligned mounting holes of the screw 74. At least one socket 78 is mounted in the orifices of the yoke 76 and around the screw. The screw 74 comprises a head which bears on the sleeve via a washer 80, and receives at its opposite end a nut 82 which bears on another socket or the corresponding ear of the yoke 76 by the intermediate of a washer 84. The ball 72 associated with the fact that the thickness or axial dimension of the end 52 along the axis C of the screw 74 is less than the distance between the ears of the yoke 76 along of the same axis C, allows inclinations of the axis 52 vis-à-vis a plane perpendicular to the axis C. The axis 44 and in particular its thread has an outer diameter D1. The axis 52 and in particular its housing 56 has an internal diameter D2, which is greater than D1 so that the axis 44 can slidely cooperate in the housing 56. The housing 56 of the axis 52 has a generally cylindrical shape in the example shown. Because of this housing, the axis 52 has a generally tubular shape.
    The tubular portion 54 of the sleeve 48 surrounds the axis 52 and comprises a free end, located on the side of the end 50, which is intended to cooperate by bearing with a counter nut 85 screwed onto the axis 52. C ' here is the same threading of the axis 52 which cooperates with the sleeve 48 and the locknut 85. The opposite end of this tubular portion 54 is connected to the tubular portion 46 of the sleeve, which surrounds the axis 44. This tubular portion 46 comprises a free end, located on the side of the end 42, which is intended to cooperate by bearing with another counter nut 86 screwed on the axis 44. This is the same threading of the axis 44 which cooperates with the sleeve 48 and the locknut 86.
    In the example shown, the housing 56 has a length along the axis A which is configured to receive at least a portion and for example up to 50% of the length of the axis 44. The tubular portion 54 of the sleeve 48 has a length along the axis A which is similar to that of the housing 56 or the thread of the axis 52.
    The threads of the first and second axes 44, 52 may be in opposite directions. Alternatively, they are in the same direction, but not different. For a given rotation of the sleeve 48, the displacement of the axes 44, 52 will be greater with threads in opposite directions than with threads of the same direction and not different. The advantage of the first case lies in the fact that a rotation of a small angle of the socket can make it possible to move the axes 44, 52 over a significant distance, and the advantage of the second case lies in the fact that the adjustment the relative position of the axes can be more accurate.
    Figures 6 and 7 show the rod 40 respectively in a maximum elongated position and a maximum retracted position. In other words, the connecting rod has a maximum length in FIG. 6 and a minimum length in FIG.
    In FIG. 6, the tubular portion 54 of the bushing 48 is screwed onto a first inlet part of the thread of the shaft 52 and, in the same way, the tubular portion 46 of the bushing 48 is screwed onto a first part The bushing is then positioned so as to distance as far as possible the axes 44, 52 from one another, the axis 44 not being engaged in the housing 56 of FIG. the axis 52.
    In FIG. 7, the tubular portion 54 of the sleeve 48 is screwed to an end portion of the thread of the axis 52 and, in the same way, the tubular portion 46 of the sleeve 48 is screwed onto a portion of end of the thread of the axis 44. The sleeve is then positioned to bring as close as possible the axes 44, 52 of one another, the axis 44 being engaged in the housing 56 of the axis 52.
    In the two cases shown, the locknuts 85, 86 are screwed and take up position against the respective free ends of the sleeve 48 to lock it in rotation with respect to the axes 44, 52. In the case of the 7, the lock nuts 85, 86 are in the immediate vicinity of the ends 42, 50 of the connecting rod.
    FIG. 8 shows the connecting rod 40 in the environment corresponding to FIG. 1. It connects a member, such as a yoke 88, of a turbomachine 10 to the hoop 20. It is therefore clear that the yoke 88 forms the clevis 62 of FIG. 4, and the cradle clevis 20 forms the yoke 76 of FIG.
    It may also be noted in FIGS. 5 to 8 that the counter-nuts 85, 86 comprise orifices 90 passing through at least one brake wire for their immobilization in rotation. The same brake wire can for example pass through orifices 90 of two locknuts 85, 86.
    As mentioned above, it is the rotation of the sleeve 48 which adjusts the length of the rod 40. The rotation of the sleeve can be achieved by means of a tool such as a key. In the example shown, the portion 54 of the sleeve 48 has in cross section a non-circular and for example hexagonal peripheral shape in order to cooperate with such a key.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Biel (40) of adjustable length for an aircraft turbomachine (10), this connecting rod having a generally elongate shape and having two longitudinal ends (42, 50) opposite attachment to elements to be connected, characterized in that: a first (42) of these longitudinal ends is connected to a first threaded shaft (44) screwed into a first tubular portion (46) of an adjusting sleeve (48), - a second (50) of these longitudinal ends is connected to a second threaded shaft (52) screwed into a second tubular portion (54) of the adjustment sleeve, and further comprising a housing (56) in which at least a portion of the first axis is configured to slide.
    [2" id="c-fr-0002]
    2. Rod (40) according to the main claim, wherein the first and second axes (44, 52), the sleeve (48) and the housing (56) are coaxial.
    [3" id="c-fr-0003]
    3. Rod (40) according to one of the preceding claims, wherein a first against-nut (86) is screwed onto the first axis (44) and is adapted to bear on a free end of said first portion (46). ), and a second against-nut (85) is screwed on the second axis and is adapted to bear on a free end of said second portion (54).
    [4" id="c-fr-0004]
    4. Connecting rod (40) according to one of the preceding claims, wherein said longitudinal ends (42, 50) each comprise a housing in which is mounted a ball (58, 72) traversed by a fixing screw (60, 74). .
    [5" id="c-fr-0005]
    5. Rod (40) according to one of the preceding claims, wherein the first axis (44) is cylindrical and the second axis (52) is tubular.
    [6" id="c-fr-0006]
    6. Rod (40) according to one of the preceding claims, wherein the threads of the first and second axes (44, 52) are in opposite directions.
    [7" id="c-fr-0007]
    7. Rod (40) according to one of claims 1 to 5, wherein the threads of the first and second axes (44, 52) are in the same direction, but not different.
    [8" id="c-fr-0008]
    8. Rod (40) according to one of the preceding claims, configured so that the first and second axes (44, 52) are movable relative to each other, by rotation of the sleeve (48), from a first position in which the axes are at a distance from each other, to a second position in which the first axis is engaged in the second axis.
    [9" id="c-fr-0009]
    9. An aircraft turbomachine (10), such as a helicopter, equipped with at least one connecting rod (40) according to one of the preceding claims.
    [10" id="c-fr-0010]
    10. Aircraft, such as a helicopter, comprising a cell in which is mounted a turbomachine (10) according to the preceding claim, said connecting rod (40) extending substantially vertically at 6 o'clock by analogy with the dial of a clock, its upper longitudinal end being attached to an element of the turbomachine and its lower longitudinal end being fixed to a structural element (16) of the helicopter.
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    同族专利:
    公开号 | 公开日
    CA3028890A1|2017-12-28|
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    PL3472479T3|2020-08-10|
    EP3472479A1|2019-04-24|
    EP3472479B1|2020-04-29|
    FR3052828B1|2018-06-08|
    US10544823B2|2020-01-28|
    WO2017220891A1|2017-12-28|
    JP2019527645A|2019-10-03|
    RU2738037C2|2020-12-07|
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    CN109312773A|2019-02-05|
    KR20190017803A|2019-02-20|
    RU2018144794A|2020-10-08|
    引用文献:
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    法律状态:
    2017-04-26| PLFP| Fee payment|Year of fee payment: 2 |
    2017-12-22| PLSC| Search report ready|Effective date: 20171222 |
    2018-06-05| PLFP| Fee payment|Year of fee payment: 3 |
    2018-08-17| CD| Change of name or company name|Owner name: SAFRAN HELICOPTER ENGINES, FR Effective date: 20180717 |
    2019-05-22| PLFP| Fee payment|Year of fee payment: 4 |
    2020-05-20| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1655788|2016-06-21|
    FR1655788A|FR3052828B1|2016-06-21|2016-06-21|ROD OF ADJUSTABLE LENGTH FOR TURBOMACHINE|FR1655788A| FR3052828B1|2016-06-21|2016-06-21|ROD OF ADJUSTABLE LENGTH FOR TURBOMACHINE|
    PCT/FR2017/051564| WO2017220891A1|2016-06-21|2017-06-16|Adjustable-length connecting rod for turbomachine|
    EP17737321.4A| EP3472479B1|2016-06-21|2017-06-16|Connecting rod with variable length for a turbomachine|
    PL17737321T| PL3472479T3|2016-06-21|2017-06-16|Connecting rod with variable length for a turbomachine|
    US16/311,653| US10544823B2|2016-06-21|2017-06-16|Adjustable-length connecting rod for turbomachine|
    KR1020187036526A| KR20190017803A|2016-06-21|2017-06-16|Adjustable connecting rod for turbo machines|
    CA3028890A| CA3028890A1|2016-06-21|2017-06-16|Adjustable-length connecting rod for turbomachine|
    CN201780037904.3A| CN109312773A|2016-06-21|2017-06-16|The connecting rod of adjustable in length for turbine|
    JP2018566430A| JP2019527645A|2016-06-21|2017-06-16|Adjustable length connecting rod for turbomachinery|
    RU2018144794A| RU2738037C2|2016-06-21|2017-06-16|Adjustable-length thrust for gas turbine engine|
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