GROUND MANEUVERING DEVICE FOR LANDING GEAR SKID AIRCRAFT

Abstract

The invention relates to a ground maneuvering device for landing gear skid-type devices. One of the objectives of this invention is to provide a maneuvering device for moving a landing gear skid-type device, such as an aircraft, on the ground without requiring the removal of a side pod when the device is equipped with one. To this end, the inventor proposes a ground maneuvering device comprising pivoting arms connected to wheels. The pivoting arms are pushed to rotate relative to the body of the ground maneuvering device in a downward direction until the wheels make contact with the ground and the landing gear skid is lifted off the ground. Figure to be published with the abstract: Figure 4

Description

Title of the invention: GROUND MANEUVERING DEVICE FOR LANDING GEAR SKID DEVICES technical field

[0001] The invention relates to the field of ground maneuvering devices for landing gear skid-type aircraft, such as helicopters. Previous technique

[0002] Helicopters are known which generally include two parallel landing gear skids for stabilizing the helicopter on the ground.

[0003] In this context, these helicopters require maneuvering devices to move them on the ground.

[0004] In this regard, we know of document EP351743 IB 1 which describes a ground maneuvering device for helicopter which allows a landing gear skid to be lifted using a hydraulic unit.

[0005] In practice, the ground maneuvering device of document EP3517431B1 comprises a housing with a fixing mechanism, a hydraulic unit with an extendable piston and a pivoting lever for transferring torque, and two horizontal wheels at each end of the housing.

[0006] In particular, the hydraulic unit is mounted in the housing so as to be able to lift the latter vertically when the piston is deployed.

[0007] However, when equipment such as a side platform or step is present above a landing gear skid, it may pose a problem when installing the ground maneuvering device of document EP3517431B1, because such equipment may prevent or hinder the ground maneuvering device of document EP3517431B1 from being positioned vertically, as required.

[0008] In this case, it may be necessary to dismantle the gondolas before installing the ground maneuvering device of document EP3517431B1.

[0009] However, this can take time and require additional tools, which can be costly and complex.

[0010] Furthermore, this may increase the risk of damaging the nacelles or the helicopter if this process is carried out incorrectly.

[0011] In the case of a step arranged above a landing gear skid, it is not possible to use the ground maneuvering device of document EP3517431B1.

[0012] Thus, there is a need for a solution that avoids the situation described above. above. Summary of the invention

[0013] The invention aims to solve, at least partially, this need.

[0014] The invention relates in particular to a ground maneuvering device which is designed to lift a landing gear skid of a landing gear skid aircraft in order to maneuver it on the ground.

[0015] In practice, the landing gear skid is previously in contact with the ground and resistant to traction.

[0016] Furthermore, the ground maneuvering device includes, - a main body extending along a longitudinal direction between a rear and a front section, and designed to be positioned on the landing gear skid, - at least one fastening element that is connected to the main body and designed to be attached to the landing gear skid in a detachable manner, - a first rotating axis which extends along a transverse direction of the main body and which is designed to rotate in the transverse direction, - a pair of pivoting arms, each pivoting arm having a proximal part and a distal part, the pivoting arms being connected to each other in parallel, in a fixed rotational manner, by their proximal part, to the first rotating axis, - a pair of axles, each axle having a proximal end and a distal end, - the proximal end being rigidly connected to the distal part of a respective pivoting arm, and - the distal end being connected to a respective wheel so that the wheel can rotate freely around the axle, - at least one selective displacement device for the pair of pivoting arms relative to the main body, the selective displacement device being disposed inside the main body and designed to act on the pair of pivoting arms in order to rotate them, around the first rotational axis, relative to the main body, so as to move the pair of pivoting arms between, - a transport position in which the distal part of the pair of pivoting arms is substantially oriented in the longitudinal direction, and - an operating position in which the distal part of the pair of pivoting arms is substantially oriented towards the ground, so that the wheels come into contact with the ground and the landing gear skid is lifted off the ground, - at least one control lever that extends along the longitudinal direction of the main body and is designed to actuate, by a vertical reciprocating motion, the selective displacement device, and - at least one pumping pedal which is permanently connected to the control lever and which is designed to be operated by an operator so as to initiate the vertical reciprocating movement of the control lever.

[0017] In a first embodiment, the ground-based maneuvering device comprises: - a first axis of rotation extending in the longitudinal direction of the main body and connected to the fastening element such that the fastening element can rotate about the first axis of rotation within a predetermined angular range, and - at least one locking element designed to lock the fastening element in rotation in a disengageable manner so that the fastening element can move between, - a latching position in which, - the fastening element is hooked to the landing gear skid, and - the locking element locks the fastening element in rotation, - a free position in which the locking element leaves the fastening element free.

[0018] In a second embodiment, the ground maneuvering device comprises: - a second axis of rotation extending along a transverse direction of the main body, and - a rotating, hand-gripped traction device comprising at least one first traction handle and at least one longitudinal arm, the longitudinal arm having a first end and a second end, the first traction handle being connected to the first end of the longitudinal arm, the second axis of rotation being connected to the second end of the longitudinal arm, in which the manually operated rotary traction device is designed to be moved in rotation between at least, - a folded position in which the manually operated rotary traction device is folded back onto the main body, and - a deployed position in which, - the manually operated rotary traction device moves away from the main body by projecting longitudinally from the main body, and - the main body can be tilted relative to the ground and can be pulled by the hand-grip rotary traction device into an inclined rolling motion position, so as to allow the operator to roll the maneuvering device on the ground to a desired location by pushing or pulling the hand-grip rotary traction device in a desired direction.

[0019] In a first example of the second embodiment, the angular difference in position of the manually gripped rotary traction device between the folded position and the deployed position is 180° or less.

[0020] In a second example of the second embodiment, the rotating, hand-gripped traction device is further designed to be moved into a stabilizing position from either the deployed or folded position, in which the main body can be inclined relative to the ground, and - the rotating traction device with manual grip makes contact with the ground at its distal end and supports the main body.

[0021] In a variant of the second example of the second embodiment, the angular difference in position of the manually gripped rotating traction device between the deployed position and the stabilization position is 90° or less.

[0022] In a third embodiment, the selective displacement device comprises at least one hydraulic cylinder which includes, - at least one extendable piston having an end designed to act on the pair of pivoting arms so as to move the pair of pivoting arms between the transport position and the operating position, and - at least one cylinder rod which is connected to the extendable piston.

[0023] In a first example of the third embodiment, the selective displacement device further comprises, - at least one hydraulic fluid reservoir, - a second rotating axis extending along a transverse direction of the main body and designed to rotate in the transverse direction, the second rotating axis being fixedly connected to the control lever in a rotational manner, - a motion transmission system that is connected to the second rotating axis and is designed to transform the rotation of the second rotating axis into linear motion, and - at least one hydraulic pump that is connected to the power transmission system and the hydraulic fluid reservoir, the hydraulic pump being designed to, - supply the selective displacement device with hydraulic fluid from the hydraulic fluid reservoir, and - be operated by the motion transmission system.

[0024] In a variant of the first example of the third embodiment, the motion transmission system comprises, - at least one transmission lever that is fixedly connected to the second rotating axis, and - a plurality of connecting rods, at least one of which connects the transmission lever to the hydraulic pump.

[0025] In a second example of the third embodiment, the de- Selective placement further includes a third rotating axis which extends along a transverse direction of the main body, which is designed to rotate in the transverse direction within a predetermined angular range and which is connected to one end of the cylinder rod in a rotationally rigid manner. Brief description of the drawings

[0026] Other features and advantages of the invention will be better understood from the following description and with reference to the accompanying drawings, given by way of illustration and not limitation.

[0027] [Fig-1] Figure [Fig.1] shows two ground maneuvering devices according to the invention which were respectively installed on a landing gear skid of a helicopter.

[0028] [Fig.2] [Fig.2] represents a first zoomed view of [Fig.1].

[0029] [Fig.3] [Fig.3] represents a second zoomed view of [Fig.1].

[0030] [Fig.4] Figure [Fig.4] represents a ground maneuvering device according to the invention, retracted from a wheel.

[0031] [Fig. 5] Fig. 5 represents a pivoting arm mechanism of the device ground maneuver according to the invention.

[0032] [Fig.6] Fig.6 represents part of a pivoting arm mechanism of the ground maneuvering device according to the invention, when connected to a wheel.

[0033] [Fig.7] Fig.7 represents a ground maneuvering device according to the invention, in a transport position.

[0034] [Fig.8] Fig.8 represents a ground maneuvering device according to the invention, in an intermediate position, between the transport position and an operating position.

[0035] [Fig.9] Fig.9 represents a ground maneuvering device according to the invention, in the operating position.

[0036] [Fig. 10] The [Fig. 10] represents a fastening element according to the invention.

[0037] [Fig. 11] Fig. 11 represents a ground maneuvering device according to the invention, with a rotating traction device in the deployed position.

[0038] [Fig. 12] Fig. 12 represents a ground maneuvering device according to the invention, with the rotating traction device in the stabilization position.

[0039] [Fig. 13] The [Fig. 13] represents a selective displacement device according to the invention.

[0040] The figures do not necessarily respect the scales, for illustrative purposes only.

[0041] In addition, some drawings are presented in color and / or transparency, as their representation in black and white is impossible. In particular, color is necessary in these drawings to discern details that would be lost if they were presented in black and white. Description of the implementation methods

[0042] Preliminary remarks

[0043] In order not to obscure the description and distract the reader from understanding the principles of the invention, our explanations will not go beyond what we consider necessary for a person in the technical field of material handling equipment to understand and appreciate the underlying concepts of the invention. Indeed, the embodiments illustrated in the description are, for the most part, composed of elements known to a person skilled in the art.

[0044] Objective of the invention

[0045] One of the objectives of this invention is to provide a maneuvering device for moving on the ground a landing gear skid-equipped device, such as an aircraft (e.g. a helicopter), which does not require the removal of a side pod when the device is equipped with one and which can be installed without being hindered by the presence of a step arranged above the landing gear skid.

[0046] For this purpose, the inventor proposes a ground maneuvering device which includes pivoting arms which are connected to wheels, the pivoting arms being pushed to be rotated relative to the body of the ground maneuvering device, in a downward direction until the wheels make contact with the ground and the landing gear skid is lifted from the ground.

[0047] Thanks to an arrangement, the ground maneuvering device according to the invention allows for quick and easy installation on the landing gear skids of a landing gear skid-equipped aircraft, such as a helicopter.

[0048] Furthermore, this saves time and costs associated with removing and reinstalling the nacelles, as well as reducing the risk of damaging the nacelles or the helicopter. It is also possible to position the maneuvering device on the ground, even if the landing gear skid aircraft includes a step located above the landing gear skid.

[0049] In addition, this improves the overall efficiency of the maintenance and commissioning process for landing gear skid aircraft equipped with side pods or a step arranged as shown above.

[0050] Finally, this makes the ground maneuvering device according to the invention more versatile and therefore potentially more attractive to operators who regularly use landing gear skid devices with different configurations.

[0051] General structure of the invention

[0052] As illustrated in [Fig. 1], [Fig. 2] and [Fig. 3], the invention relates to a ground maneuvering device 100 which is designed to lift a landing gear skid 10 of a landing gear skid aircraft in order to maneuver it on the ground.

[0053] In the example of Figures 1 to 3, the device is an aircraft, such as a helicopter 20.

[0054] However, depending on the needs and available resources, consideration may be given to to use the ground maneuvering device 100 on other landing gear skid-type aircraft, without requiring substantial modifications to the invention.

[0055] In particular, in the invention, it is assumed that the landing gear skid 10 is previously in contact with the ground.

[0056] Furthermore, in the invention, the landing gear skid 10 is considered to be resistant to traction.

[0057] As illustrated in [Fig.4], the ground maneuvering device 100 comprises a main body 110, at least one fixing element 120, a first rotating axis 130, a pair of pivoting arms 140, a pair of axles 150, at least one selective displacement device 160 of the pair of pivoting arms 140, at least one control lever 170 and at least one pumping pedal 180.

[0058] Thus, the ground maneuvering device 100 can include a main body 110, two or more of two fixing elements 120, a first rotating axis 130, a pair of pivoting arms 140, a pair of axles 150, two or more of two selective displacement devices 160 of the pair of pivoting arms 140, two or more of two control levers 170 and two or more of two pumping pedals 180.

[0059] The main body

[0060] As illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9] and [Fig.13], the main body 110 extends along a longitudinal direction D between a rear part 200 and a front part 300.

[0061] In addition, the width of the main body 110 extends along a transverse direction of the main body 110, the transverse direction being substantially perpendicular to the longitudinal direction D.

[0062] Furthermore, the main body 110 is designed to be disposed on the landing gear skid 10.

[0063] In a first example, the width of the main body 110 is substantially equal to the diameter or width of the landing gear skid 10.

[0064] In a second example, the width of the main body 110 is substantially greater than the diameter or width of the landing gear skid 10.

[0065] However, depending on the needs and resources available, other values ​​for the width of the main body 110 may be considered, without requiring substantial modifications to the invention.

[0066] The fastening element

[0067] As illustrated in [Fig.2], [Fig.3], [Fig.4], [Fig.7], [Fig.8], [Fig.9] and [Fig.10], the fastening element 120 is connected to the main body 110.

[0068] In one example, the fastening element 120 is connected to the main body 110 by at least one connecting element 30 such as a rivet, a bolt, a screw or similar.

[0069] However, depending on the needs and resources available, other connecting elements 30 may be used, without requiring substantial modifications to the invention.

[0070] In particular, the fastening element 120 is arranged under the main body 110, so that, in operation, only the fastening element 120 comes into contact with the landing gear skid 10.

[0071] In the example of figures 2 to 4 and 7 to 10, the fixing element 120 is arranged in the rear part 200 of the main body 110.

[0072] However, depending on the needs and resources available, it may be possible to consider placing the fastening element 120 elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0073] Furthermore, the fastening element 120 is designed to be attached to the landing gear skid 10 in a detachable manner.

[0074] In a first example of the fastening element 120, it is in the form of fastening hooks which are designed to be hooked to a plurality of studs 40 (illustrated in [Fig.1], [Fig.2], and [Fig.3]) or fastening bolts which are located on the landing gear skid 10.

[0075] In a second example of the fastening element 120, it is in the form of fastening hooks which are designed to fit into fastening openings (not shown) which are made in the landing gear skid 10.

[0076] However, depending on the needs and resources available, other forms of the fastening element 120 may be considered, without requiring substantial modifications to the invention.

[0077] The first rotating axis

[0078] As illustrated in [Fig.4], [Fig.5], [Fig.7], [Fig.8], [Fig.9] and [Fig.13], the first rotating axis 130 extends along a transverse direction of the main body 110.

[0079] In the example of figures 4 to 5, 7 to 9 and 13, the first rotating axis 130 is arranged in the rear part 200 of the main body 110.

[0080] However, depending on the needs and resources available, it may be possible to consider arranging the first rotating axis 130 elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0081] Furthermore, the first rotating axis 130 is designed to rotate in the transverse direction.

[0082] The pair of pivoting arms

[0083] The pair of pivoting arms 140 is illustrated in [Fig.4], [Fig.5], [Fig.6], [Fig.7], [Fig.8], [Fig.9] and [Fig.13],

[0084] Furthermore, as illustrated in [Fig.5], each pivoting arm 140 has a proximal part 141 and a distal part 142.

[0085] In the example of figures 4 to 9 and 13, the pivoting arms 140 are arranged in the rear part 200 of the main body 110 so that the distal part 142 of each pivoting arm 140 is oriented towards the rear part 200 of the main body 110 and the proximal part 141 of each pivoting arm 140 is oriented towards the front part 300 of the main body 110.

[0086] However, depending on the needs and resources available, it may be possible to consider arranging the pivoting arms 140 elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0087] Furthermore, the pivoting arms 140 are connected to each other in parallel, in a fixed rotational manner, by their proximal part 141, to the first rotating axis 130.

[0088] In other words, the pivoting arms 140 are fixed so as to rotate with the first rotating axis 130, without being able to move independently so that when the first rotating axis 130 rotates, the pivoting arms 140 also move in rotation.

[0089] In a particular way of implementing the invention, the first rotating axis 130 is connected to a lower part of the proximal part 141 of the pair of pivoting arms 140.

[0090] In one embodiment of the invention, as illustrated in [Fig.4], [Fig.5], [Fig.6], [Fig.7], [Fig.9] and [Fig.13], each pivoting arm 140 is in the form of a plate which includes at least one first relief opening 143.

[0091] Thus, in this embodiment of the invention, each pivoting arm 140 can include two or more of two first relief openings 143.

[0092] The pair of axles

[0093] The pair of axles 150 is illustrated in [Fig.4], [Fig.5], [Fig.6] and [Fig.13].

[0094] Furthermore, as illustrated in [Fig. 5] and [Fig. 6], each axle 150 presents a proximal end 151 and a distal end 152.

[0095] In addition, each axle 150 is connected in a rigid manner, at its proximal end 151, to the distal part 142 of a respective pivoting arm 140.

[0096] Furthermore, each axle 150 is also connected, at its distal end 152, to a respective wheel 50, so that the wheel 50 can rotate freely around the axle 150.

[0097] Thus, as illustrated in figures 4 to 6 and 13, each axle 150 extends along a transverse direction of the main body 110 between a respective pivoting arm 140 and a respective wheel 50.

[0098] The selective displacement device for the pair of pivoting arms

[0099] As illustrated in [Fig.4], the selective displacement device 160 of the pair of pivoting arms 140 relative to the main body 110 is disposed inside the main body 110.

[0100] In practice, the selective displacement device 160 is designed to act on the pair of pivoting arms 140 in order to rotate it around the first rotating axis 130 relative to the main body 110.

[0101] In a particular embodiment of the invention, the selective displacement device 160 is designed to act on an upper part of the proximal part 141 of the pair of pivoting arms 140.

[0102] In this way, the selective displacement device 160 can move the pair of pivoting arms 140 between a transport position and an operating position.

[0103] In particular, in the transport position, as illustrated in [Fig.7], the distal part 142 of the pair of pivoting arms 140 is substantially oriented in the longitudinal direction D of the main body 110.

[0104] In a particular embodiment, the distal part 142 of the pair of pivoting arms 140 is substantially oriented upwards.

[0105] Furthermore, in the operating position, as illustrated in [Fig.8] and [Fig.9], the distal part 142 of the pair of pivoting arms 140 is substantially oriented towards the ground, so that the wheels 50 come into contact with the ground and the landing gear skid 10 is lifted off the ground.

[0106] In particular, the example in [Fig.8] illustrates the pair of pivoting arms 140 in an intermediate position, between the transport position and the operating position.

[0107] Furthermore, [Fig.9] illustrates the pair of pivoting arms 140 in the operating position.

[0108] The control lever

[0109] As illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.13], the control lever 170 extends along the longitudinal direction D of the main body 110.

[0110] In the example of figures 4, 7 to 9, 11 and 13, the control lever 170 is arranged in the front part 300 of the main body 110.

[0111] However, depending on the needs and resources available, it may be possible to consider placing the control lever 170 elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0112] In addition, the control lever 170 is designed to actuate, by a vertical reciprocating motion (i.e., a reciprocating "up and down" motion), the selective displacement device 160.

[0113] In other words, the control lever 170 is designed to move in a vertical reciprocating motion in a vertical direction relative to the longitudinal direction D of the main body 110.

[0114] In a first embodiment of the invention, the control lever 170 is coupled to at least one return spring (not shown).

[0115] Thus, in this first embodiment of the invention, the control lever 170 can be coupled to two or more of two return springs.

[0116] In a first way of this first embodiment, when the vertical reciprocating movement reaches the bottom point, the control lever 170 is automatically returned to the top point under the effect of the return spring.

[0117] In a second way of this first embodiment, when the vertical reciprocating movement reaches the high point, the control lever 170 is automatically returned to the low point under the effect of the return spring.

[0118] In a second embodiment of the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.12], the control lever 170 is in the form of a plate which includes at least one second relief opening 171.

[0119] Thus, in this second embodiment of the invention, the control lever 170 can include two or more of two second relief openings 171.

[0120] The pumping pedal

[0121] As illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.12], the pumping pedal 180 is permanently connected to the control lever 170.

[0122] In addition, the pumping pedal 180 is designed to be operated by an operator so as to initiate the vertical reciprocating movement of the control lever 170.

[0123] First embodiment of the invention: the fastening element is mounted pivotally relative to the main body

[0124] In the first embodiment of the invention, as illustrated in [Fig.4] and [Fig. 10], the ground maneuvering device 100 further comprises a first axis of rotation 121 and at least one locking element 122.

[0125] Thus, in the first embodiment of the invention, the ground maneuvering device 100 can include a first axis of rotation 121 and two or more of two locking elements 196.

[0126] In practice, the first axis of rotation 121 extends in the longitudinal direction D of the main body 110.

[0127] In the example of figures 4 and 10, the first axis of rotation 121 is disposed in the rear part 200 of the main body 110.

[0128] However, depending on the needs and resources available, it may be possible to consider arranging the first axis of rotation 121 elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0129] Furthermore, the first axis of rotation 121 is connected to the fixing element 120 so that the fixing element 120 can rotate around the first axis of rotation 121 within a predetermined angular range.

[0130] In one example, the fixing element 120 can rotate about the first axis of rotation 121 in a predetermined angular range of 30° or less, preferably 25° or less, preferably 20° or less, preferably 15° or less, preferably 10° or less.

[0131] However, depending on the needs and resources available, other values ​​of the predetermined angular range may be used, without requiring substantial modifications to the invention.

[0132] In practice, the locking element 122 is designed to lock the fixing element 120 in rotation in a disengageable manner so that the fixing element 120 can move between a hooked position and a free position.

[0133] In particular, in the hooked position, the fastening element 120 is hooked to the landing gear skid 10 and the locking element 122 locks the fastening element 120 in rotation.

[0134] Furthermore, in the free position, the locking element 122 leaves the fixing element 120 free.

[0135] Second embodiment of the invention: a rotating traction device

[0136] In the second embodiment of the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.12], the ground maneuvering device 100 further comprises a second axis of rotation 190 and a rotary traction device 191 with manual grip.

[0137] In one example, the rotating traction device 191 includes at least one handling handle.

[0138] In practice, the second axis of rotation 190 extends along the transverse direction of the main body 110.

[0139] In the example of figures 4 and 11 to 12, the second axis of rotation 190 is disposed in the front part 300 of the main body 110.

[0140] However, depending on the needs and available resources, the second axis of rotation 190 may be located elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications. of the invention.

[0141] In practice, the rotary traction device 191 with manual grip includes at least one first traction handle 1911 and at least one longitudinal arm 1912.

[0142] In practice, the longitudinal arm 1912 has a first end and a second end.

[0143] In particular, the first 1911 pull handle is connected to the first end of the 1912 longitudinal arm.

[0144] Furthermore, the second axis of rotation 190 is connected to the second end of the longitudinal arm 1912.

[0145] In a first particular way, the second axis of rotation 190 is designed to rotate in the transverse direction and is connected to the second end of the longitudinal arm 1912 in a rotationally fixed manner.

[0146] In other words, the longitudinal arm 1912 is fixed so as to rotate with the second axis of rotation 190, without being able to move independently so that when the second axis of rotation 190 rotates, the longitudinal arm 1912 also moves in rotation.

[0147] In a second particular way, the second axis of rotation 190 is fixed and is connected to the second end of the longitudinal arm 1912 so that the longitudinal arm 1912 can rotate around the second axis of rotation 190.

[0148] In addition, the rotary traction device 191 with manual grip is designed to be moved in rotation between at least one folded position and one deployed position.

[0149] In particular, in the folded position (illustrated in [Fig.1], [Fig.2], [Fig.3], [Fig.4], [Fig.7], [Fig.8] and [Fig.9]), the rotary traction device 191 with manual grip is folded onto the main body 110.

[0150] Furthermore, in the deployed position (illustrated in [Fig. 11]), the rotary traction device 191 with manual grip moves away from the main body 110 by protruding longitudinally from the main body 110.

[0151] In particular, in the example of [Fig. 11], the rotary traction device 191 with manual grip has longitudinal projection from the front part 300 of the main body 110.

[0152] In particular, in the deployed position, the main body 110 can be inclined relative to the ground and can be pulled by the manually gripped rotary traction device 191 into an inclined rolling motion position.

[0153] In this way, the operator can roll the ground maneuvering device 100 to a desired location by pushing or pulling the manually gripped rotary traction device 191 in a desired direction.

[0154] In an example of the second embodiment, the angular difference in position of the manually gripped rotary traction device 191 between the folded position and the deployed position is 180° or less.

[0155] However, depending on the needs and resources available, other values ​​of the angular difference may be considered, without requiring substantial modifications to the invention.

[0156] In a variant of the second embodiment, as illustrated in [Fig.12], the rotary traction device 191 with manual grip is further designed to be moved into a stabilization position, from the deployed position or from the folded position.

[0157] In particular, in the stabilization position, the main body 110 can be inclined relative to the ground and the rotating traction device 191 with manual grip comes into contact with the ground at its distal end and supports the main body 110.

[0158] In a first example of the variant of the second embodiment, the angular difference in position of the manually gripped rotary traction device 191 between the deployed position and the stabilization position is 90° or less.

[0159] In a second example of the variant of the second embodiment, the angular difference in position of the manually gripped rotary traction device 191 between the folded position and the stabilization position is 270° or less.

[0160] However, depending on the needs and resources available, other values ​​of the angular difference may be considered, without requiring substantial modifications to the invention.

[0161] Third embodiment of the invention: the selective displacement device comprises a hydraulic cylinder

[0162] In the third embodiment of the invention, as illustrated in [Fig.13], the selective displacement device 160 includes at least one hydraulic cylinder 161.

[0163] Thus, in the third embodiment of the invention, the selective displacement device 160 can include two or more of two hydraulic cylinders 161.

[0164] In practice, the hydraulic cylinder 161 comprises at least one extendable piston and at least one cylinder rod which is connected to the extendable piston.

[0165] Thus, the hydraulic cylinder 161 can comprise two or more of two extendable pistons and two or more of two cylinder rods.

[0166] In a first example, the hydraulic cylinder 161 is a single-acting cylinder.

[0167] In a second example, the hydraulic cylinder 161 is a double-acting cylinder.

[0168] In practice, the extendable piston has an end which is designed to act on the pair of pivoting arms 140 so as to move the pair of pivoting arms 140 between the transport position and the operating position, as explained above.

[0169] In a variant of the third embodiment of the invention, as illustrated in [Fig.2], [Fig.3], [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11], [Fig.12] and [Fig. 13], the selective displacement device 160 further comprises at least one hydraulic fluid reservoir 162 (e.g. oil), a second rotating axis 163, a motion transmission system 164 and at least one hydraulic pump 165.

[0170] Thus, in the variant of the third embodiment of the invention, the ground maneuvering device 100 may comprise two or more of two hydraulic fluid reservoirs 162, a second rotating axis 163, a motion transmission system 164 and two or more of two hydraulic pumps 165.

[0171] As illustrated in [Fig.13], the second rotating axis 163 extends along the transverse direction of the main body 110.

[0172] In the example of figures 2 to 4, 7 to 9, and 11 to 13, the second rotating axis 163 is disposed in the front part 300 of the main body 110.

[0173] However, depending on the needs and resources available, the second rotating axis 163 may be considered to be located elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0174] In addition, the second rotating axis 163 is designed to rotate in the transverse direction.

[0175] Furthermore, the second rotating axis 163 is connected to the control lever 170 in a fixed rotational manner.

[0176] In other words, the control lever 170 is fixed so as to rotate with the second rotating axis 163, without being able to move independently so that when the second rotating axis 163 rotates, the control lever 170 also moves in rotation.

[0177] In practice, the motion transmission system 164 is connected to the second rotating axis 163.

[0178] In addition, the motion transmission system 164 is designed to transform the rotation of the second rotating axis 163 into linear motion.

[0179] In a particular way of the motion transmission system 164, as illustrated in [Fig. 13], the motion transmission system 164 comprises at least one transmission lever 1641 and a plurality of connecting rods 1642.

[0180] In practice, in the particular way of the motion transmission system 164, the transmission lever 1641 is connected to the second rotating axis 163 in a rotationally fixed manner.

[0181] In other words, the transmission lever 1641 is fixed so as to rotate with the second rotating axis 163, without being able to move independently so that when the second rotating axis 163 rotates, the transmission lever 1641 also moves in rotation.

[0182] Furthermore, in the particular manner of the motion transmission system 164, at least one connecting rod 1642 of the plurality of connecting rods 1642 connects the transmission lever 1641 to the hydraulic pump 165.

[0183] In practice, the hydraulic pump 165 is connected to the motion transmission system 164 and to the hydraulic fluid reservoir 162.

[0184] Furthermore, the hydraulic pump 165 is designed to supply the selective displacement device 160 with hydraulic fluid from the hydraulic fluid reservoir 162.

[0185] On the other hand, the hydraulic pump 165 is designed to be operated by the motion transmission system 164.

[0186] In view of the above, it is understood that the pumping pedal 180 is connected to the control lever 170, which is itself connected to the second rotating axis 163, which is itself connected to the motion transmission system 164, which is itself connected to the hydraulic pump 165.

[0187] Thus, in a first example, when the pumping pedal 180 is moved to the lowest point, the hydraulic pump 165 draws hydraulic fluid from the hydraulic fluid reservoir 162, then, when the pumping pedal 180 is moved to the highest point, the hydraulic pump 165 supplies the selective displacement device 160 with all or part of the aspirated hydraulic fluid.

[0188] Also, in a second example, when the pumping pedal 180 is moved to the high point, the hydraulic pump 165 draws hydraulic fluid from the hydraulic fluid reservoir 162, then, when the pumping pedal 180 is moved to the low point, the hydraulic pump 165 supplies the selective displacement device 160 with all or part of the aspirated hydraulic fluid.

[0189] In one way of implementing the variant of the third embodiment of the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11], [Fig.12] and [Fig.13], the selective displacement device 160 further includes a third rotating axis 166.

[0190] In practice, the third rotating axis 166 extends along a transverse direction of the main body 110.

[0191] In addition, the third rotating axis 166 is designed to rotate in the transverse direction within a predetermined angular range.

[0192] In one example, the third rotating axis 166 can rotate within a predetermined angular range of 20° or less, preferably 15° or less, preferably 10° or less.

[0193] However, depending on the needs and resources available, other values ​​of the predetermined angular range may be considered, without requiring substantial modifications to the invention.

[0194] Furthermore, the third rotating axis 166 is connected to an end portion of the rod of cylinder in a fixed, rotating manner.

[0195] In other words, the end part of the cylinder rod is fixed so as to rotate with the third rotating axis 166, without being able to move independently so that when the third rotating axis 166 rotates, the end part of the cylinder rod also moves in rotation.

[0196] Conclusion

[0197] We have described and illustrated the invention. However, the invention is not limited to the embodiments we have presented. Indeed, numerous combinations of variants, alternatives, embodiments, and implementations can be envisaged without requiring substantial modifications to the invention. Thus, an expert in the field can deduce other variants, alternatives, embodiments, and implementations by reading the description and the accompanying figures, and taking into account the economic, ergonomic, and dimensional constraints to be respected.

[0198] In particular, when an element is "designed" to perform a particular function, this means that the element is created specifically for the purpose of performing that particular function.

[0199] However, depending on the needs and resources available, consideration may be given to using an existing element, which will be modified or adapted to fulfill this particular function, without requiring substantial modifications to the invention.

[0200] The invention can be the subject of numerous variations and applications other than those described above. In particular, unless otherwise indicated, the various structural and functional features of each particular embodiment described above should not be considered as combined and / or closely and / or inextricably linked to one another, but, on the contrary, as mere juxtapositions. Furthermore, the structural and / or functional features of the various embodiments described above may be the subject, in whole or in part, of any different juxtaposition or any different combination.

[0201] In a first particular embodiment of the invention, as illustrated in [Fig.2], [Fig.3], [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.12], the ground maneuvering device 100 includes an outer cover which encloses the selective displacement device 160 so as to protect all or part of the selective displacement device 160 from the outside.

[0202] In a second particular way of implementing the invention, the fixing element 120 comprises the first axis of rotation 121 and the locking element 122.

[0203] In a third particular way of implementing the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9] and [Fig.13], the operating device further comprises a second pull handle 193.

[0204] In the example of figures 4, 7 and 9 to 13, the second pull handle 193 is arranged in the rear part 200 of the main body 110, opposite the pump pedal 180, so that the operator can grasp, at the same time, the pump pedal 180 and the second pull handle 193 to transport the ground maneuvering device 100 and / or position the ground maneuvering device 100 on the landing gear skid 10.

[0205] However, depending on the needs and resources available, the first pull handle 1911 and the second pull handle 193 may be considered to be located elsewhere between the rear part 200 and the front part 300 of the main body 110, without requiring substantial modifications to the invention.

[0206] In a fourth particular embodiment of the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9] and [Fig.13], the ground maneuvering device 100 includes a first locking device 194, such as a locking finger, which holds the pair of pivoting arms 140 in the operating position.

[0207] In an example of the fourth particular way of implementing the invention, when moving from the transport position to the operating position, all or part of the distal portion 142 of the pair of pivoting arms 140 acts on the first locking device 194 to disengage it from a hole or bore that is formed in the main body 110. Then, when the pair of pivoting arms 140 is in the operating position, the distal portion 142 of the pair of pivoting arms 140 allows the first locking device 194 to engage with the hole or bore that is formed in the main body 110, so as to maintain the pair of pivoting arms 140 in the operating position.

[0208] In a fifth particular embodiment of the invention, as illustrated in [Fig.4], [Fig.7], [Fig.8], [Fig.9], [Fig.11] and [Fig.12], the ground maneuvering device 100 includes a second locking device 195, such as a locking finger, which holds the manually gripped rotary traction device 191 in the folded position, in the deployed position or in the stabilizing position.

[0209] In an example of the fifth particular way of implementing the invention, the second locking device 195 is designed to engage in a hole or bore that is formed in the control lever 170.

Claims

Claims

1. A ground maneuvering device (100) adapted to lift a landing gear skid (10) of a landing gear skid apparatus for ground maneuvering, the landing gear skid (10) being previously in contact with the ground and resistant to traction, the ground maneuvering device (100) comprising, • a main body (110) which extends along a longitudinal direction, D, between a rear portion (200) and a front portion (300), and which is designed to be arranged on the landing gear skid (10), • at least one fixing element (120) which is connected to the main body (110) and designed to be hooked to the landing gear skid (10) in a detachable manner, • a first rotary axis (130) which extends along a transverse direction of the main body (110) and which is adapted to rotate in the transverse direction, • a pair of pivoting arms (140), each pivoting arm (140) having a proximal part (141) and a distal part (142), the pivoting arms (140) being connected to each other in parallel, in a rotationally fixed manner, by their proximal part (141), to the first rotary axis (130), • a pair of axles (150), each axle (150) having a proximal end (151) and a distal end (152), • the proximal end (151) being integrally connected to the distal portion (142) of a respective pivoting arm (140), and • the distal end (152) being connected to a respective wheel (50) so that the wheel (50) can rotate freely around the axle (150), • at least one device (160) for selectively moving the pair of pivoting arms (140) relative to the main body (110), the selective moving device (160) being arranged inside the main body (110) and designed to act on the pair of pivoting arms (140) in order to cause it to rotate, around the first rotary axis (130), relative to the main body (110), so as to move the pair of pivoting arms (140) between,

2. • a transport position in which the distal portion (142) of the pair of pivoting arms (140) is substantially oriented in the longitudinal direction, D, and • an operating position in which the distal portion (142) of the pair of pivoting arms (140) is substantially oriented towards the ground, so that the wheels (50) come into contact with the ground and the landing gear skid (10) is lifted off the ground, • at least one control lever (170) which extends along the longitudinal direction, D, of the main body (110) and which is designed to actuate, with a vertical reciprocating movement, the selective displacement device (160), and • at least one pumping pedal (180) which is securely connected to the control lever (170) and which is designed to be actuated by an operator so as to initiate the vertical reciprocating movement of the control lever (170). A ground maneuvering device (100) according to claim 1 comprising, • a first rotation axis (121) which extends in the longitudinal direction, D, of the main body (110) and which is connected to the fixing element (120) so that the fixing element can rotate about the first rotation axis (121) within a predetermined angular range, and • at least one locking element (122) which is designed to rotationally lock the fastening element (120) in a releasable manner so that the fastening element (120) can move between, • a hanging position in which, • the fixing element (120) is attached to the landing gear skid (10), and • the locking element (122) locks the fixing element (120) in rotation, • a free position in which the locking element (122) leaves the fixing element free (120).

3. A ground maneuvering device (100) according to any one of claims 1 to 2, comprising, • a second axis of rotation (190) which extends along a transverse direction of the main body (110), and • a manually-operated rotary traction device (191) which comprises at least one first traction handle (1911) and at least one longitudinal arm (1912), the longitudinal arm (1912) having a first end and a second end, the first traction handle (1911) being connected to the first end of the longitudinal arm (1912), the second rotation axis (190) being connected to the second end of the longitudinal arm (1912), wherein, the manually gripping rotary traction device (191) is adapted to be rotatably moved between at least, • a folded position in which the manually grippable rotary traction device (191) is folded onto the main body (110), and • a deployed position in which, • the manually gripping rotary traction device (191) moves away from the main body (110) by projecting longitudinally from the main body (110), and • the main body (110) can be inclined relative to the ground and can be pulled by the hand-held rotary traction device (191) into an inclined rolling movement position, so as to enable the operator to roll the ground maneuvering device (100) to a desired location by pushing or pulling the hand-held rotary traction device (191) in a desired direction.

4. A ground maneuvering device (100) according to claim 3, wherein the angular difference in position of the manually engaged rotary traction device (191) between the folded position and the deployed position is 180° or less.

5. A ground maneuvering device (100) according to any one of claims 3 to 4, wherein the manually grippable rotatable traction device (191) is further adapted to be moved into a stabilizing position, from the deployed position or from the stowed position, wherein, • the main body (110) can be tilted relative to the ground, and • the manually grippable rotatable traction device (191) contacts the ground at its distal end and supports the main body (110).

6. The ground maneuvering device (100) of claim 5, wherein the angular difference in position of the manually engaged rotary traction device (191) between the deployed position and the stabilizing position is 90° or less.

7. A ground maneuvering device (100) according to any one of claims 1 to 6, wherein the selective displacement device (160) comprises at least one hydraulic cylinder (161) which comprises, • at least one extendable piston which has one end which is adapted to act on the pair of pivoting arms (140) so as to move the pair of pivoting arms (140) between the transport position and the operating position, and • at least one cylinder rod which is connected to the extendable piston.

8. Ground maneuvering device (100) according to claim 7, wherein the selective displacement device (160) further comprises, • at least one reservoir (162) of hydraulic fluid, • a second rotary axis (163) which extends along a transverse direction of the main body (110) and which is adapted to rotate in the transverse direction, the second rotary axis (163) being connected to the control lever (170) in a rotationally fixed manner, • a motion transmission system (164) which is connected to the second rotary axis (163) and which is adapted to transform the rotation of the second rotary axis (163) into a linear movement, and • at least one hydraulic pump (165) which is connected to the motion transmission system (164) and to the hydraulic fluid reservoir (162), the hydraulic pump (165) being designed to, • supply the selective displacement device (160) with hydraulic fluid from the hydraulic fluid reservoir (162), and • be actuated by the motion transmission system (164).

9. Ground maneuvering device (100) according to claim 8, wherein the motion transmission system (164) comprises, • at least one transmission lever (1641) which is connected to the second rotary axis (163) in a rotationally fixed manner, and • a plurality of connecting rods (1642) of which at least one connecting rod (1642) connects the transmission lever (1641) to the hydraulic pump (165).

10. A ground maneuvering device (100) according to any one of claims 7 to 9, wherein the selective displacement device (160) further comprises a third rotary axis (166) which extends along a transverse direction of the main body (110), which is adapted to rotate in the transverse direction within a predetermined angular range and which is connected to one end of the cylinder rod in a rotationally fixed manner.

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