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FR3128692A1 - Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position. - Google Patents

Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position. Download PDF

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Publication number
FR3128692A1
FR3128692A1 FR2111573A FR2111573A FR3128692A1 FR 3128692 A1 FR3128692 A1 FR 3128692A1 FR 2111573 A FR2111573 A FR 2111573A FR 2111573 A FR2111573 A FR 2111573A FR 3128692 A1 FR3128692 A1 FR 3128692A1
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FR
France
Prior art keywords
pistons
wheel
locking
cam
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR2111573A
Other languages
French (fr)
Inventor
Pierre-Yves Liegeois
Laurent Schwartz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Landing Systems SAS
Original Assignee
Safran Landing Systems SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Safran Landing Systems SAS filed Critical Safran Landing Systems SAS
Priority to FR2111573A priority Critical patent/FR3128692A1/en
Priority to PCT/EP2022/080146 priority patent/WO2023073142A1/en
Publication of FR3128692A1 publication Critical patent/FR3128692A1/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/32—Alighting gear characterised by elements which contact the ground or similar surface 
    • B64C25/405—Powered wheels, e.g. for taxing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0015—Disposition of motor in, or adjacent to, traction wheel the motor being hydraulic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
    • F03C1/00—Reciprocating-piston liquid engines
    • F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
    • F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
    • F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/50—Aeroplanes, Helicopters
    • B60Y2200/51—Aeroplanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/15—Failure diagnostics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/301—Sensors for position or displacement
    • B60Y2400/3012—Sensors for position or displacement using Hall effect

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Hydraulic Motors (AREA)

Abstract

Dispositif d’entraînement (D) en rotation d’une roue (R) comprenant un moteur (M) hydraulique à pistons (Q1, Q2, Q3, Q4, Q5) radiaux et des moyens de verrouillage (20) des pistons en position rentrée. FIGURE DE L’ABREGE : Fig.3A Device for driving (D) in rotation a wheel (R) comprising a hydraulic motor (M) with radial pistons (Q1, Q2, Q3, Q4, Q5) and means (20) for locking the pistons in the retracted position . ABRIDGE FIGURE: Fig.3A

Description

Dispositif d’entraînement en rotation d’une roue comprenant un moteur hydraulique à pistons radiaux et des moyens de verrouillage des pistons en position rentrée.Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position.

La présente invention concerne l’entraînement en rotation d’une roue de véhicule, et plus particulièrement un moteur hydraulique à pistons radiaux pourvu de moyens de blocage des pistons en position rentrée.The present invention relates to the rotational drive of a vehicle wheel, and more particularly to a hydraulic motor with radial pistons provided with means for locking the pistons in the retracted position.

ARRIERE PLAN DE L’INVENTIONBACKGROUND OF THE INVENTION

Dans le domaine de l’aviation, il est désormais prévu d’équiper les aéronefs d’un dispositif d’entraînement en rotation des roues pour permettre le déplacement au sol de l’aéronef sans utiliser son ou ses groupes motopropulseurs. Il s’agit généralement de mettre en rotation un organe d’entraînement et de transmettre le mouvement de rotation de l’organe d’entraînement à la roue via une interface de liaison.In the field of aviation, it is now planned to equip aircraft with a device for driving the wheels in rotation to allow movement on the ground of the aircraft without using its power unit(s). This generally involves rotating a drive member and transmitting the rotational movement of the drive member to the wheel via a link interface.

Il est connu d’équiper une roue d’aéronef d’un moteur hydraulique à pistons radiaux pour l’entraîner en rotation. Le moteur hydraulique comprend une came ondulée liée en rotation à la roue, un bloc-cylindres comportant une pluralité de cylindres disposée radialement par rapport à l’axe de rotation de la roue, et une pluralité de pistons montés coulissant dans les cylindres et pourvus à une extrémité d’un galet d’appui sur la came. De cette manière, le bloc-cylindres peut entraîner en rotation la came qui entraîne à son tour la roue pour déplacer l’aéronef.It is known to equip an aircraft wheel with a radial piston hydraulic motor to drive it in rotation. The hydraulic motor comprises a corrugated cam linked in rotation to the wheel, a cylinder block comprising a plurality of cylinders arranged radially with respect to the axis of rotation of the wheel, and a plurality of pistons mounted sliding in the cylinders and provided with one end of a support roller on the cam. In this way, the cylinder block can rotate the cam which in turn drives the wheel to move the aircraft.

Pour des questions de sécurité, il est prévu, notamment au décollage et à l’atterrissage de l’aéronef, de d’éloigner les galets de la came. Pour cela, le dispositif d’entraînement comprend des moyens de rappel élastique des pistons en position rentrée dans leurs cylindres respectifs pour éloigner lesdits pistons de la came. Les moyens de rappel élastique comprennent généralement des ressorts de traction attelés à des appendices des galets.For safety reasons, it is planned, in particular during take-off and landing of the aircraft, to move the rollers away from the cam. For this, the drive device comprises means for elastic return of the pistons to the retracted position in their respective cylinders to move said pistons away from the cam. The elastic return means generally comprise tension springs coupled to appendages of the rollers.

Toutefois, une défaillance du dispositif d’entraînement (perte ou casse d’un ressort, grippage d’un piston en position sortie, mise en pression intempestive d’un cylindre…) peut amener la came à venir taper sur l’un ou plusieurs des galets portés par des pistons défaillants, et donc générer des chocs et des frottements importants pouvant entraîner des casses en fonction de la vitesse de rotation de la roue. Une telle défaillance aurait des conséquences catastrophiques du point de vue de la sureté de fonctionnement, notamment au décollage.However, a failure of the drive device (loss or breakage of a spring, seizure of a piston in the extended position, untimely pressurization of a cylinder, etc.) may cause the cam to strike on one or more rollers carried by faulty pistons, and therefore generate significant shocks and friction which can cause breakage depending on the speed of rotation of the wheel. Such a failure would have catastrophic consequences from the point of view of operational safety, in particular on takeoff.

Pour s’assurer que l’ensemble des pistons du dispositif d’entraînement sont bien en position rentrée, il a été envisagé d’équiper chacun des cylindres d’un capteur de position du piston. Néanmoins, cela implique un nombre important de capteurs, ce qui amoindrit la fiabilité de la détection des pistons en position rentrée.To ensure that all the pistons of the drive device are indeed in the retracted position, it was envisaged to equip each of the cylinders with a piston position sensor. However, this involves a large number of sensors, which reduces the reliability of the detection of the pistons in the retracted position.

OBJET DE L’INVENTIONOBJECT OF THE INVENTION

L’invention a pour but de proposer une solution remédiant au moins en partie aux inconvénients précités.The object of the invention is to propose a solution which at least partially overcomes the aforementioned drawbacks.

A cet effet, on propose un dispositif d’entraînement en rotation d’une roue comprenant un moteur hydraulique à pistons radiaux. Le moteur comporte :To this end, a device for driving a wheel in rotation comprising a hydraulic motor with radial pistons is proposed. The engine includes:

  • une came ondulée ;a wavy cam;
  • un bloc-cylindres monté mobile en rotation par rapport à la came autour d’un axe et comprenant une pluralité de cylindres disposées radialement par rapport audit axe ;a cylinder block mounted rotatably relative to the cam around an axis and comprising a plurality of cylinders arranged radially relative to said axis;
  • une pluralité de pistons montés coulissants dans les cylindres et destinés à venir dans une position sortie en appui sur la came sous l’effet d’un fluide sous pression ; eta plurality of pistons slidably mounted in the cylinders and intended to come into an extended position resting on the cam under the effect of a pressurized fluid; And
  • des moyens de rappel élastique des pistons en position rentrée dans leurs cylindres respectifs.means for elastic return of the pistons to the retracted position in their respective cylinders.

Selon l’invention, le dispositif d’entraînement comprend en outre des moyens de verrouillage des pistons en position rentrée.According to the invention, the drive device further comprises means for locking the pistons in the retracted position.

De manière particulière, les moyens de blocage comprennent une cloche comportant un disque et une pluralité de fourches s’étendant en saillie axiale d’un pourtour externe dudit disque. La cloche est montée mobile en translation entre une position de verrouillage dans laquelle chacun des pistons a une face supérieure coopérant avec l’une des fourches, et une position de libération dans laquelle les fourches sont éloignées des pistons.In particular, the locking means comprise a bell comprising a disk and a plurality of forks extending axially from an outer periphery of said disk. The bell is mounted movable in translation between a locking position in which each of the pistons has an upper face cooperating with one of the forks, and a release position in which the forks are remote from the pistons.

De manière particulière, chacune des fourches comprend deux dents qui, lorsque la cloche est en position verrouillée, s’étendent de part et d’autre de l’un des galets portés par les pistons.In particular, each of the forks comprises two teeth which, when the bell is in the locked position, extend on either side of one of the rollers carried by the pistons.

L’invention concerne aussi une roue d’aéronef portée par un essieu et équipée d’un tel dispositif d’entraînement. La came et le bloc-cylindres sont respectivement liées en rotation à la roue et à l’essieu sur lequel est reçu à pivotement ladite roue.The invention also relates to an aircraft wheel carried by an axle and equipped with such a drive device. The cam and the cylinder block are respectively linked in rotation to the wheel and to the axle on which said wheel is pivotally received.

L’invention concerne également un atterrisseur portant au moins une telle roue.The invention also relates to a landing gear carrying at least one such wheel.

L’invention concerne en outre un aéronef comprenant au moins un tel atterrisseur.The invention further relates to an aircraft comprising at least one such undercarriage.

L’invention sera mieux comprise à la lumière de la description qui suit, laquelle est purement illustrative et non limitative, et doit être lue en regard des figures annexées, parmi lesquelles :The invention will be better understood in the light of the following description, which is purely illustrative and not limiting, and must be read in conjunction with the appended figures, among which:

la est une représentation simplifiée d’un aéronef comprenant un train d’atterrissage comportant des roues pourvues d’un dispositif d’entraînement en rotation selon l’invention ; there is a simplified representation of an aircraft comprising a landing gear comprising wheels provided with a rotary drive device according to the invention;

la est une vue schématique d’un dispositif d’entraînement en rotation d’une roue selon un mode de réalisation particulier de l’invention, en coupe dans un plan perpendiculaire à un axe de rotation dudit dispositif d’entraînement, dans laquelle les galets portés par chacun des pistons sont en appui contre la came ; there is a schematic view of a device for driving a wheel in rotation according to a particular embodiment of the invention, in section in a plane perpendicular to an axis of rotation of said drive device, in which the rollers carried by each of the pistons bearing against the cam;

] la est une vue identique à la , dans laquelle les pistons sont en position rentrée ; ] there is a view identical to the , in which the pistons are in the retracted position;

la est une représentation simplifiée du dispositif d’entraînement illustré à la , dans un plan passant par l’axe de rotation dudit dispositif d’entraînement, dans laquelle les moyens de blocage des pistons sont en position verrouillée ; et there is a simplified representation of the training device shown in , in a plane passing through the axis of rotation of said drive device, in which the means for locking the pistons are in the locked position; And

la est une vue identique à la , dans laquelle les moyens de blocage des pistons sont en position déverrouillée. there is a view identical to the , wherein the piston locking means are in the unlocked position.

Claims (6)

Dispositif d’entraînement (D) en rotation d’une roue (R) comprenant un moteur (M) hydraulique à pistons (Q1, Q2, Q3, Q4, Q5) radiaux, ledit moteur comportant :
  • une came (2) ondulée ;
  • un bloc-cylindres (3) monté mobile en rotation par rapport à la came (2) autour d’un axe (XM) et comprenant une pluralité de cylindres (4) disposées radialement par rapport audit axe ;
  • une pluralité de pistons (Q1, Q2, Q3, Q4, Q5) montés coulissants dans les cylindres et destinés à venir dans une position sortie en appui sur la came sous l’effet d’un fluide sous pression ; et
  • des moyens de rappel élastique (9) des pistons en position rentrée dans leurs cylindres respectifs,
caractérisé en ce que le dispositif d’entraînement comprend en outre des moyens de verrouillage (20) des pistons en position rentrée.Device for driving (D) in rotation a wheel (R) comprising a hydraulic motor (M) with radial pistons (Q1, Q2, Q3, Q4, Q5), said motor comprising:
  • a wavy cam (2);
  • a cylinder block (3) mounted rotatably relative to the cam (2) around an axis (X M ) and comprising a plurality of cylinders (4) arranged radially relative to said axis;
  • a plurality of pistons (Q1, Q2, Q3, Q4, Q5) mounted to slide in the cylinders and intended to come into an extended position resting on the cam under the effect of a pressurized fluid; And
  • elastic return means (9) for the pistons in the retracted position in their respective cylinders,
characterized in that the drive device further comprises means (20) for locking the pistons in the retracted position. Dispositif d’entraînement (D) selon la revendication 1, dans lequel les moyens de verrouillage comprennent une cloche (20) comportant un disque (21) et une pluralité de fourches (22) s’étendant en saillie axiale d’un pourtour externe dudit disque (21), la cloche étant montée mobile en translation entre une position de verrouillage dans laquelle chacun des pistons a une face supérieure coopérant avec l’une des fourches, et une position de libération dans laquelle les fourches sont éloignées des pistons.Drive device (D) according to Claim 1, in which the locking means comprise a bell (20) comprising a disc (21) and a plurality of forks (22) extending axially from an outer periphery of said disk (21), the bell being mounted movable in translation between a locking position in which each of the pistons has an upper face cooperating with one of the forks, and a release position in which the forks are remote from the pistons. Dispositif d’entraînement (D) selon la revendication 2, dans lequel chacune des fourches (22) comprend deux dents (23) qui, lorsque la cloche est en position verrouillée, s’étendent de part et d’autre de l’un des galets portés par les pistons.Drive device (D) according to Claim 2, in which each of the forks (22) comprises two teeth (23) which, when the bell is in the locked position, extend on either side of one of the rollers carried by the pistons. Roue (R) d’aéronef portée par un essieu et équipée d’un dispositif d’entraînement (D) selon l’une quelconque des revendications précédentes, la came (2) et le bloc-cylindres (3) étant respectivement liées en rotation à la roue (R) et à l’essieu sur lequel est reçu à pivotement ladite roue (R).Aircraft wheel (R) carried by an axle and equipped with a drive device (D) according to any one of the preceding claims, the cam (2) and the cylinder block (3) being respectively connected in rotation to the wheel (R) and to the axle on which said wheel (R) is pivotally received. Atterrisseur (P) portant au moins une roue (R) selon la revendication 4.Landing gear (P) carrying at least one wheel (R) according to claim 4. Aéronef (A) comprenant au moins un atterrisseur (P) selon la revendication 5.Aircraft (A) comprising at least one undercarriage (P) according to claim 5.
FR2111573A 2021-10-29 2021-10-29 Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position. Pending FR3128692A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR2111573A FR3128692A1 (en) 2021-10-29 2021-10-29 Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position.
PCT/EP2022/080146 WO2023073142A1 (en) 2021-10-29 2022-10-27 Device for rotating a wheel, comprising a hydraulic motor with radial pistons and means for locking the pistons in a retracted position

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2111573A FR3128692A1 (en) 2021-10-29 2021-10-29 Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position.
FR2111573 2021-10-29

Publications (1)

Publication Number Publication Date
FR3128692A1 true FR3128692A1 (en) 2023-05-05

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ID=79018562

Family Applications (1)

Application Number Title Priority Date Filing Date
FR2111573A Pending FR3128692A1 (en) 2021-10-29 2021-10-29 Device for driving a wheel in rotation comprising a hydraulic motor with radial pistons and means for locking the pistons in the retracted position.

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Country Link
FR (1) FR3128692A1 (en)
WO (1) WO2023073142A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224647A1 (en) * 1973-04-09 1974-10-31 Newage Engineers Ltd
US4522110A (en) * 1982-09-08 1985-06-11 Ab Hagglund & Soner Hydraulic radial piston motor
DE19961960A1 (en) * 1999-12-22 2001-09-27 Man Nutzfahrzeuge Ag Drive unit for commercial motor vehicle has mechanical drive between engine and rear wheels also auxiliary drive for wheels of front axle designed as hydraulic static individual wheel motors
US20040194619A1 (en) * 2003-04-01 2004-10-07 Sampo-Hydraulics Oy Radial piston hydraulic motor and method in the control of a radial piston hydraulic motor
WO2013084011A1 (en) * 2011-12-05 2013-06-13 Kalachanis Ioannis System and method for friction reduction and overheating prevention of aircraft tires at landing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2224647A1 (en) * 1973-04-09 1974-10-31 Newage Engineers Ltd
US4522110A (en) * 1982-09-08 1985-06-11 Ab Hagglund & Soner Hydraulic radial piston motor
DE19961960A1 (en) * 1999-12-22 2001-09-27 Man Nutzfahrzeuge Ag Drive unit for commercial motor vehicle has mechanical drive between engine and rear wheels also auxiliary drive for wheels of front axle designed as hydraulic static individual wheel motors
US20040194619A1 (en) * 2003-04-01 2004-10-07 Sampo-Hydraulics Oy Radial piston hydraulic motor and method in the control of a radial piston hydraulic motor
WO2013084011A1 (en) * 2011-12-05 2013-06-13 Kalachanis Ioannis System and method for friction reduction and overheating prevention of aircraft tires at landing

Also Published As

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