Sliding component locking system comprising an integrated monitoring device, drive mechanism, wheel and corresponding aircraft

Abstract

A locking system for a component comprising: A housing (9) having a chamber (12) for sliding the component; Balls (20) arranged to open at least partially into the chamber; A latch (22) movably mounted in the housing between a locked position in which, during operation, the latch presses the balls against the component to hold it in position within the housing, and an unlocked position in which, during operation, the component can slide within the housing, the latch being arranged in the housing such that, in the locked position, the latch bears against at least one wall (15) of the chamber, and in the unlocked position, the latch is away from said wall; the system further comprising at least one detection element (36) for this temporary contact. Corresponding drive mechanism and aircraft wheel. FIGURE IN ABRIDGED: Fig. 1

Description

Description Title of the invention: Locking system for a sliding component including an integrated monitoring device, mechanism drive, wheel and corresponding aircraft

[0001] | The invention relates to a locking system for a sliding element.

[0002] — The invention also relates to a drive mechanism comprising such locking system.

[0003] = The invention also relates to a wheel equipped with such a mechanism training.

[0004] The invention also relates to an aircraft equipped with such a wheel.

[0005] BACKGROUND OF THE INVENTION

[0006] In the aeronautical field, it is known to motorize the wheels of an aircraft to to facilitate the movement of the aircraft on the ground, particularly during taxiing phases.

[0007] For this purpose, the wheel is generally associated with a drive mechanism motorized including a geared motor linked to the wheel so as to be able to drive it rotation.

[0008] For operational safety reasons, a disconnection system A temporary one must be installed between the wheel and the geared motor.

[0009] — This function is usually performed using a front-toothed dog clutch, one of which The two jaws can translate relative to each other to connect / disconnect the geared motor at the wheel.

[0010] = Furthermore, in order to ensure that the movable jaw does not accidentally engage in the fixed jaw during critical phases of landing or takeoff, the The disconnected position must be locked by a locking system adequate. The state of the movable jaw (disconnected or connected to the other jaw) as well as the state of the locking system (whether the moving jaw is locked or not) is also continuously monitored by a remote aircraft controller.

[0011] — General monitoring of the temporary disconnection system unfortunately proves- terribly tedious.

[0012] — Climate change is a major concern for many bodies legislative and regulatory changes around the world. Indeed, various restrictions on the Carbon emissions standards have been, are being, or will be adopted by various states. In particular, an ambitious standard applies both to new types of aircraft but also those currently in circulation requiring the implementation of solutions technological upgrades to bring them into compliance with current regulations. Civil aviation has been mobilizing for several years now to provide a contribution to the fight against climate change. Technological research efforts have already led to significant improvements in the environmental performance of aircraft. All stakeholders in the sector are continuously working to improve energy efficiency. The Applicant takes into account the factors impacting all phases of design and development to obtain less energy-intensive and more environmentally friendly aeronautical components and products, whose integration and use in civil aviation have moderate environmental impacts, with the aim of improving the energy efficiency of air transport. Consequently, the Applicant is constantly working to reduce its climate impact by using methods and operating virtuous development and manufacturing processes that minimize greenhouse gas emissions to the minimum possible in order to reduce the environmental footprint of its activity. This sustained research and development work focuses on new generations of aircraft engines, the weight reduction of aircraft, particularly through the materials used and lighter on-board equipment, the development of the use of electric technologies to provide propulsion, and, as essential complements to technological progress, aviation biofuels. To that end, the invention is the result of technological research aimed at significantly improving aircraft performance and, in this sense, contributes to reducing the environmental impact of aircraft. SUBJECT OF THE INVENTION The invention aims in particular at a locking system for a sliding element which makes it easier to monitor a drive mechanism equipped with such a system. Summary of the invention For this purpose, the invention provides a locking system for a component comprising: A box having a chamber intended to receive, by sliding means, the said organ, Marbles arranged to open at least partially into the chamber, A movable lock mounted in the housing enters a locking position in which, in operation, the locking mechanism presses the balls into at least one groove performed in the organ to maintain the organ in position within the chamber and an unlocked position in which, during operation, the component can slide into the box, the lock being arranged in the casing so that in the locked position, the the lock is supported against at least one wall of the chamber and, in the unlocked position, the lock is away from said wall, the system incorporating a monitoring device for the locking system, the monitoring device comprising at least one element for detecting contact between the lock and the chamber wall, in which the detection element is a layer of electrically conductive material. In this way, it is relatively easy to detect whether the sliding part in the chamber is actually locked or not by the lock, by simply detecting the contact between the lock and the housing. It is advantageously the movement of the lock itself (to move from its locked position to its unlocked position) that creates a contact allowing the locking position of the lock to be detected. Furthermore, detection is done at the lock level by simple contact between the lock and the layer of electrically conductive material without requiring a special sensor at this level (such as a Hall effect sensor, contact sensor, etc.). We note that a dry contact is detected between the lock and the housing to determine the locking position of the lock, i.e. a direct mechanical contact between the lock and the housing without an intermediate element (other than the layer of electrically conductive material) and in particular without a sensor. Note that the layer of electrically conductive material allows direct electrical contact between the lock and the housing. As will be seen later, said layer may be added to the box or may be formed by a layer of the box directly (i.e. formed at the same time as the rest of the box). Optionally, the locking system's latch is mobile in translation within the chamber between its locked position and its unlocked position. Optionally, the chamber extends longitudinally along a first axis (A), the lock being mounted movable in the chamber along said first axis. Optionally, the lock is configured to cooperate magnetically with at least one magnetic element arranged in the chamber. Optionally, the system includes at least one spring linked at one end to the casing and at a second end to the lock, the spring being configured to push the lock into its locking position. Optionally, a through hole is provided in the lock, and has at least a first section with a cross-section of a first diameter and at least a second section with a cross-section of a second diameter, the second diameter being smaller than the first diameter, the balls being housed at least partly in the second section in the locked position and in the first section in the unlocked position. Optionally, the layer of electrically conductive material is also magnetically insulating. Optionally, the system includes electrical isolation of at least two system elements from each other. Optionally, said electrical insulation includes at least one layer of electrically insulating material arranged between the lock and at least one wall of the chamber with which the lock is permanently in contact. Optionally, said electrical insulation includes at least one layer of electrically insulating material arranged between the chamber and, in operation, the component. Optionally, the chamber wall against which the lock presses in the locked position is the chamber floor. The invention also relates to a drive mechanism comprising at least one actuator, a sliding member associated at one of its ends to the actuator and a locking system allowing the sliding member to be locked in a given position when the lock is in the locked position. The invention also relates to a wheel powered by said mechanism and an aircraft comprising at least one such wheel. Other features and advantages of the invention will become apparent from the following description of particular, but not limiting, embodiments of the invention. Brief description of the drawings Reference will be made to the attached drawings, among which: [Fig.1] The [Fig.1] is a cross-sectional view of a locking system for a component according to a particular embodiment of the invention, the lock of said system being in the unlocked position; [Fig.2] [Fig.2] is a cross-sectional view of the locking system shown in [Fig.1], with the lock of said system in the locked position; [Fig. 3] [Fig. 3] is a simplified diagram of an aircraft wheel drive mechanism comprising the locking system shown in [Fig. 1]. DETAILED DESCRIPTION OF THE INVENTION With reference to figures 1 to 3, in a particular embodiment of the invention, we are interested in a motorized aircraft wheel 1]. The aircraft wheel | includes a drive mechanism which comprises an actuator 2 associated with means for temporarily coupling 3 to said wheel. Actuator 2 is for example a rotary actuator and for example a motor and for example an electric motor. The drive mechanism also includes here a reducer associated with the actuator 2. In the present case the assembly formed by the reducer and the actuator 2 forms a geared motor 4. Temporary coupling means 3 include, for example, a dog clutch such as a front-toothed dog clutch. The dog clutch thus comprises a fixed jaw 5 that is rotationally fixed to the wheel and a movable jaw 6 that translates between: a retracted position in which the two jaws 5, 6 are separated one from the other (the aircraft wheel 1 then rotates freely), a service position in which the two jaws 5, 6 couple so that the rotation of the geared motor 4 causes a corresponding rotation of the aircraft wheel 1. To ensure the sliding of the movable jaw 6 between its two positions, the drive mechanism includes a sliding member formed here in the form of a control rod 7, one end of which is connected to the movable jaw 6 and the other end of which is connected to a control member of its position (not shown), a control member integrated into the geared motor 4 so that the action of the control member causes the translation of the control rod 7 and thereby of the movable jaw 6. The control device is, for example, a solenoid or a hydraulic or pneumatic linear actuator. It is therefore understood that the control rod 7 itself slides between two positions, namely: a disengaged position (corresponding to the jaw retraction position) mobile 6 meaning that the geared motor 4 can no longer drive rotation the aircraft wheel 1), an engaged position (corresponding to the jaw's service position) mobile 6 meaning that the geared motor 4 can drive the wheel in rotation of the aircraft 1). It is therefore necessary to be able to detect the state of the position of the control rod 7 (engaged or disengaged) but also to be able to lock and detect the locking state of the control rod 7 (locked or unlocked) when it is in its disengaged position for safety reasons. To this end, the drive mechanism includes a locking system 8 for the control rod 7 and more particularly for locking the control rod 7 in its disengaged position. The locking system 8 thus comprises a housing 9 which includes a plate 10 associated with a cover 11. The plate 10 and the cover 11 are fixed to each other. The housing 9 thus formed is, for example, integral with a fixed part of the actuator 2. The plate 10 and the cover 11 are further shaped so as to jointly define a chamber 12 internal to the box 9. The chamber 12 extends axially along a first axis A. Preferably, the control rod 7 is received by sliding within the box 9 so as to extend axially also along said axis A and to slide relative to the box along said axis A. Typically the plate 10 has a first orifice 13 provided in at least one of its walls so as to open at one end outside the box 9 and at a second end into the chamber 12. The first orifice 13 extends coaxially along said axis A. Correspondingly, the hood 11 has a second opening 14 provided in at least one of its walls so that the second opening 14 is opposite the first opening 13. The second opening 14 therefore also extends coaxially along said axis A. The second opening 14 is thus arranged so as to open at one end outside the box 9 and at the other end into the chamber 12. The two walls of the box 9, one bearing the first opening 13 and the other the second opening 14, are thus arranged opposite each other. The control rod 7 also extends through the casing 9 by successively extending through the first orifice 13, the chamber 12 and the second orifice 14. The control rod 7 is also shaped so that its second end (the one linked to the geared motor 4) is the one passing through the locking system 8. The first end of the control rod thus extends out of the casing 9. The hood 11 is the part of the housing 9 closest to the geared motor 4. Correspondingly, the plate 10 is the part of the housing 9 closest to the aircraft wheel | thus motorized. The wall of the hood 11 through which the second opening 14 passes is here the bottom of the hood 15. An internal wall of the bottom of the hood 15 is optionally shaped into a disc. Apart from the two openings 13, 14, chamber 12 is closed to the outside of the box 9. Preferably, the plate 10 has a sleeve 16 extending coaxially to the first axis A inside the chamber 12 so as to externally surround the control rod 7. The sleeve 16 thus allows the translation of the control rod 7 to be guided along the first axis A. The sleeve 16 extends from the opposite wall to the bottom of the hood 15 into the chamber 12. Furthermore, the first opening 13 is provided in the sheath 16. Thus, the sheath 16 is hollow and opens at one end outside the casing 9 and at another second end inside chamber 12. The sleeve 16 is of such length (along the first axis A) that its first axial end opens on the platinum side outside the box 9 and its second axial end opens into the chamber 12. The second axial end of the sleeve 16 thus extends at a distance from the bottom of the hood 15. The sheath 16 is also provided with radial openings 17, each opening 17 extending radially within the sheath 16 so as to open at one end into the first orifice 13 (therefore inside the sheath 16) and at the other end into the chamber 12 (therefore outside the sheath 16). The openings 17 all extend around the same given circumference of the sheath 16. On this circumference, the openings 17 are optionally spaced at regular intervals. Furthermore, the plate 10 and the cover 11 are shaped so that a first magnetic element 18 is arranged inside the box 9 and preferably entirely inside the box 9. For example, the first magnetic element 18 is arranged at the junction between the plate 10 and the cover 11. Optionally, the plate 10 and the box 9 jointly define a receptacle 19 in which the first magnetic element 18 is housed. The housing 9 (the plate 10 as well as the cover 11) and the first magnetic element 18 are fixed together and form a single unit. It should also be noted that this unit 18 is itself fixed relative to the area of ​​the aircraft to which the housing 9 is attached. The first magnetic element 18 is also arranged so as to extend coaxially to the first axis A. The first magnetic element 18 is also arranged so as to be centered in the box 9 along the first axis A. The first magnetic element 18 is also arranged so as to extend at least partly into the chamber 12. For example, the first magnetic element 18 forms, for at least a section of the chamber 12, a lining of a main side wall of said chamber 12. The first magnetic element 18 thus surrounds the control rod 3 externally. The first magnetic element 18 includes, for example, a coil such as a copper coil. The sleeve 16 is arranged here so that its second axial end is closer to the hood 11 than the second axial end of the first magnetic element 18. Furthermore, the locking system 8 contains 20 balls, each ball being arranged in one of the openings 17 of the sheath 16. Preferably, all the openings 17 contain a single ball 20. Correspondingly, the control rod 7 optionally includes recesses 21 (each forming a groove locally machined in the control rod 7), each recess 21 being capable of housing one of the aforementioned balls 20. The recesses 21 all extend around a given circumference of the control rod 7. Furthermore, the recesses 21 extend at regular intervals around this circumference. More specifically, the control rod 7 is shaped so that its housings 21 are opposite the balls 20 when the control rod 7 is in the disengaged position. Thus in the engaged position, as illustrated in [Fig.1], the balls 20 are present in the chamber 12 but opposite a solid section of the control rod 7. In the disengaged position, as illustrated in [Fig.2], the balls 20 are still present in the chamber but are located pushed into the respective housings 21 opposite the control rod 7. It is understood that the balls 20 are axially immobile—along the first axis A—within the housing 9, being housed in the recesses 21. Furthermore, the balls 20 can move radially within the sleeve 16, moving closer together (when the control rod 7 is in the disengaged position) or further apart (when the control rod 7 is in the engaged position). Naturally, the recesses 21 are shaped so that the balls 20 can move radially within the recesses 21 without being able to exit the recesses 21 at the level of the inside of the sleeve 16. To guide the radial movement of the balls 20, the locking system 8 includes a movably mounted lock 22 in the housing 9 between: a locking position in which the lock 22 presses the balls 20 ra- dialement in the corresponding housings 21 of the control rod 7 to hold the control rod 7 in position in the housing 9 (the rod of control 7 is then in the disengaged and locked position in the housing 9), And an unlocked position in which the lock 22 allows a radial movement of the balls 20 outwards from the control rod 7 which allows the control rod 7 to slide back into the casing 9 along the first axis A (the control rod 7 can thus pass freely from his disengaged position to his engaged position). The lock 22 is here mounted to slide in the box 9 along the first axis A between its two positions. The lock 22 is shaped into a solid of revolution. The lock 22 is shaped so as to extend axially coaxially to the first axis A. Lock 22 is arranged entirely inside chamber 12. The lock 22 is arranged in chamber 12 so as to be surrounded externally by the first magnetic element 18 and internally by the sheath 16. Optionally, the lock 22 includes a bearing 23. The bearing 23 is a solid of revolution extending coaxially to the first axis A. For example, the bearing 23 is formed externally of at least one cylindrical section 24 extended at one axial end by at least one truncated cone section 25. For example, the cylindrical section 24 is the one closest here to the bottom of the hood 15. An opening 26 is provided in the bearing 23 so as to extend in the bearing 23 coaxially to the first axis A and to open at a first axial end and at a second axial end outside the bearing 23. The opening 26 has the same cross-section here over its entire length (along the first axis A). The lock 22 is guided in translation along the first axis A by the contact of the bearing 23 with the first magnetic element 18 and / or the main side wall of the chamber 12. The bearing 23 is preferably of such a length (along the first axis A) that it is always opposite (along the first axis A) the first magnetic element 18. For example, the bearing 23 is shaped so as to have a greater length than that of the first magnetic element 18. Optionally, the lock 22 includes a ring 27 arranged in the bearing 23 so as to extend coaxially to the bearing 23. The ring 27 and the bearing 23 are rigidly fixed to each other so as to form a single block. The ring 27 is a solid of revolution extending coaxially to the first axis A. For example, the ring 27 is externally shaped as a cylinder provided at a first axial end by a flange 33 opposite a first axial end of the bearing 23. In the present case, the first axial ends of the ring 27 and the bearing 23 are those furthest from the bottom of the hood 15. The ring 27 is also of such length (along the first axis A) that its second axial end extends in the same plane as that of the bearing 23. Furthermore, an opening 28 is provided in the ring 27 so as to extend coaxially along the first axis A and to be open at a first axial end and at a second axial end outside the ring 27. Opening 28 here presents a main section comprising a first sub-section 29 in the form of a cylinder of a first diameter, a second sub-section 30 in the form of a cylinder of a second diameter which is greater than that of the first sub-section 29 and a third Sub-section 31 connects the first sub-section 29 and the second sub-section 30. The third sub-section 31 therefore has at least one sloping lateral flank. The third sub-section 31 is, for example, shaped like a truncated cone. The first sub-section 29 is the one furthest from the bottom of the hood 15. The second sub-section 30 opens outside the ring 27 to form the second axial end of said ring 27. Furthermore, the opening 28 has a secondary section 32 extending from the main section. The secondary section 32 is shaped into a cylinder, one end of which opens at the first axial end of the ring 27, and the other end of which forms the boundary with the main section. Moreover, the secondary section is shaped so that its diameter is greater than that of the first sub-section 29. The main section and the secondary section together thus define a step 34. The lock 22 is preferably formed into a second magnetic element cooperating with the first magnetic element 18 so that it can be moved in the chamber 12. In the present case, when the first magnetic element 18 is electrically powered, the lock 22 is magnetically attracted by the first magnetic element 18 so as to tend towards its unlocked position. For example, bearing 23 and / or ring 27 is made of a magnetic material and for example ferromagnetic. For example, bearing 23 and / or ring 27 includes or is a coil and, for example, a solenoid core. Furthermore, the locking system 8 here includes a spring 35, a first axial end of which (along the first axis A) is linked to the box 9 and therefore a second axial end is linked to the lock 22. For example, the first axial end of the spring 35 is fixed to the plate 10 and, for example, is fixed to the wall of the plate 10 pierced by the first orifice 13. For example, the second axial end of the spring 35 is fixed to the ring 27 and, for example, to the notch 34 of said ring 27. The spring 35 is arranged so as to extend in the chamber 12 co-axially to the first axis A and therefore co-axially to the control rod 7, the sleeve 16 and the lock 22. The spring 35 is arranged here so as to surround externally the control rod 7 and the sleeve 16. In contrast, the spring 35 is surrounded externally here by the lock 22, the spring 35 extending partly into the opening 28 of the ring 27. The spring 35 is also arranged so as to tend to push the lock 22 towards the bottom of the hood 15. As will be detailed below, when the lock 22 is in the locked position, it bears against at least one wall of the chamber 12 (from which it is away in its unlocked position). In this case, it only bears against the bottom of the cover 15 in its locked position. Therefore, the locking system 8 includes at least one monitoring device for the locking system 8. Said monitoring device includes at least one element for detecting temporary contact of the lock with the bottom of the hood. In this particular embodiment, a first detection element 36 is formed into a layer of electrically conductive material arranged on the bottom of the hood 15 so that the lock 22 comes to rest against said layer when it comes into contact with the bottom of the hood 15. The layer of electrically conductive material may partially or totally cover the bottom of the hood 15. The said layer is preferably made of a material that is also magnetically insulating so as not to interfere with the relationship between the lock 22 and the first magnetic element 18. This layer is, for example, made of or based on aluminium, copper, non-magnetic steel (and, for example, non-magnetic stainless steel)... The said layer can be applied to the bottom of the hood 15 (by gluing for example) or can be an integral part of the bottom of the hood 15 (the layer being for example in the form of paint, varnish or any other coating or being part of the material of the hood 11 directly). It is therefore understood that the latch 22 must be made, at least in part, of an electrically conductive material to cooperate with the first sensing element 36. For example, the ring 27 and / or the bearing 23 is made of an electrically conductive material such as, for example, iron, steel, copper, or aluminum. For example, the ring 27 is made of copper, steel (and, for example, non-magnetic stainless steel), or aluminum. For example, the bearing 23 is made of iron. A second detection element is, for example, an electrical measuring sensor (not shown here) arranged in or outside the locking system 8 and / or arranged in or outside the drive mechanism. The sensor measures, for example, the electrical continuity of an electrical path in the locking system 8, the lock 22 acting as a contactor depending on whether or not it is in contact with the first detection element 36. Preferably, the locking system 8 is configured to limit interference in the electrical path within the locking system 8. For this purpose, the said system is designed to electrically isolate from each other the elements of said system other than the lock pair 22 / bottom of the hood 15. For example, a layer 38 of electrically insulating material is arranged between the plate 10 and cover 11 at least at their connection point (layer 38 may be an additional layer arranged between plate 10 and cover 11 or a layer integrated into plate 10 and / or cover 11). The first magnetic element 18 is then separated from plate 10 by said layer 38. Preferably, a layer 37 of electrically insulating material is arranged between the main side face of the chamber 12 and the outer contour of the latch 22, at least at their contact area (the layer 37 may be an additional layer arranged between the chamber 12 and the latch 22 or a layer integrated into the latch 22 and / or the chamber 12). In this case, said layer 37 is arranged at the level of the cover 11 (and not the plate 10). For example, the layer 37 is supported by the chamber 12. Preferably, a layer 39 of electrically insulating material is arranged between the main lateral face of the control rod 7 and the chamber 12, at least at their contact area (the layer 39 may be an additional layer arranged between the chamber 12 and the control rod 7 or a layer integrated into the control rod 7 and / or the chamber 12). In this case, said layer 39 is arranged at the level of the cover 11 (and not the plate 10), and in particular at the level of the second orifice 14. For example, the layer 39 is carried by the control rod 7 and is of such a length that it ensures electrical insulation between the control rod 7 and the chamber 12 at the level of the second orifice 14, regardless of the relative position of the control rod 7 in the chamber 12. Regardless of the electrically insulating layer considered, the layer is, for example, made of or based on plastic and, for example, polyetheretherketone (such as PEEK, a registered trademark), polyamide, polytetrafluoroethylene (such as Teflon, a registered trademark)... The various mechanical parts of the locking system 8 thus allow the flow of an electric current within the locking system 8 thanks to the lock 22, the first detection element 36 and the various layers of electrically insulating material 37, 38, 39. The operation of the locking mechanism will now be described. Unlock position ([Fig.1]) The control rod 7 is arranged in any position other than its disengaged position so that the housings 21 are offset from the balls 20. The balls 20 are then arranged in the second sub-section 30 and / or the third sub-section 31 of the ring 27. The balls 20 are thus in contact with a solid section of the control rod 7, the walls of the openings 17 of the sleeve 16 and the second sub-section 29 and / or the third sub-section 30. The action exerted by the balls 20 on the bolt 22 opposes that exerted by the spring 35 on the bolt 22, so that the bolt 22 remains in its position of unlocking. The lock 22 is arranged here so that its first axial end face is substantially level with a first axial end face of the first magnetic element 18, its second axial end face then protruding (along the first axis A) from the second axial end face of the first magnetic element 18. Furthermore, the lock 22 is then supported against a wall 40 formed by the plate 10 of the chamber 12. Preferably, said wall 40 is shaped to conform to the shape of the first axial end of the lock 22. Said wall 40 thus forms a housing for receiving the ring 27 and at least the truncated cone section 25 of the bearing 23. Furthermore, the lock 22 is arranged so as to externally surround the sheath 16. For example, the sheath 16 and the lock 22 are shaped so that the second axial end of the lock 22 extends at the level of the second axial end of the sheath 16. In this position, the second axial end face of the lock 22 is offset from the bottom of the cover 15 and therefore does not touch it. The electrical contact locking 22 / bottom of the hood 15 is thus open. The control rod 7 can then be moved to the disengaged position. For this purpose, when the control rod 7 slides into the disengaged position, its housings 21 come into contact with the balls 20 which enter the housings 21, causing an automatic movement of the lock 22 into its locking position by the action of the spring 35. It is therefore understood that the lock 22 moves into the locked position without the first magnetic element 18 being powered. The third sub-section 31, shaped in plan, facilitates the movement of the lock 22 into its locking position. Locking position ([Fig.2]) The control rod 7 is necessarily arranged in its disengaged position so that the balls 20 are in the housings 21. In this position, the balls 20 are arranged in the first sub-section 29 of the lock 22. The balls 20 are thus in contact on one side with the housings 21 of the control rod 7, the walls of the openings 17 of the sleeve 16 and the first sub-section 29. Due to the reduced diameter of the first sub-section 29, it presses against the balls 20, thus forcing them towards the bottom of the recesses 21 of the control rod 7. This allows the control rod 7 to be locked in the disengaged position. Furthermore, the lock 22 is arranged to externally surround the sleeve 16. By example the sheath 16 and the lock 22 are shaped so that the third sub-section 31 extends at the level of the second axial end of sheath 16. The lock 22 is also arranged so that its first axial end face is opposite the first magnetic element 18. Furthermore, its second axial end is in contact with the bottom of the cover 15. Preferably, the second axial end of the lock 22 extends in a plane (normal to the first axis A). Preferably, the second axial end of the lock 22 conforms to the shape of at least the area of ​​the bottom of the hood 15 on which it presses. This allows for a flat-to-flat contact between the lock 22 and the bottom of the cover 15. This facilitates the detection of the position of the lock 22 in the locked position. The sensor therefore detects an electrical continuity between the lock 22 and the bottom of the hood 15 since the electrical contact lock 22 / bottom of the hood 15 is thus closed. To move from the locking position to the unlocking position, the first magnetic element 18 is electrically powered: the lock 22 is then magnetically attracted by the first magnetic element 18 and moves into its unlocking position (against the action of the spring 35). The control rod 7 can then be operated to move out of its disengaged position. The power supply to the first magnetic element 18 can then be cut off. Thus, the locking system 8 allows the control rod 7 to be locked in the disengaged position in a simple and effective way. Advantageously, maintaining the disengaged position is done without input of energy. Furthermore, the same sensing elements allow both the locking position of the lock 22 and the disengaged position of the control rod 7 to be detected (since the lock 22 can only be in its locking position if the control rod 7 is in its disengaged position). Furthermore, the detection elements are at least largely integrated into the locking system 8. Lock 22 in particular directly plays the role of an electrical contactor (which is open or closed). Of course, the invention is not limited to the embodiments described but encompasses any variant falling within the scope of the invention as defined by the claims. In particular, although here the locking system is applied to an aircraft wheel drive mechanism, the locking system can be used in any other application and for example for a wheel of a land vehicle, amphibious vehicle or even for a control element of a rudder. The drive mechanism may include any type of rotary or linear actuator (motor, cylinder, etc.). The drive mechanism may include any type of temporary coupling means (if it has any) such as a dog clutch system or a clutch (disc, magnetic, etc. for example). Although here the ring and / or the bearing is made of an electrically conductive material, the ring and / or the bearing may only be coated at least partially in an electrically conductive material. Although here the ring is made of a magnetically conductive material, the ring will not necessarily be made of a magnetically conductive material provided that the bearing is then made of a magnetically conductive material in order to be able to work with the first magnetic element. The detection element will be able to detect a contact of the lock other than with the bottom of the hood such as a contact of the lock with an internal side face of the chamber (only in contact with the lock when it is in the locked position). Although the control rod here has ball-receiving recesses (each forming a groove for a single ball), the control rod may also have a groove capable of holding at least two balls simultaneously. This groove may extend around the entire circumference of the control rod. In all cases, the groove may be toroidal in shape. The bearing and the locking ring can be a single piece.

Claims

Claims

1. System for locking an organ comprising: A box (9) having a chamber (12) intended to receive sliding said organ, Balls (20) arranged to at least partially unblock in the room, A lock (22) mounted movably in the box between a locking position in which, in use, the lock presses the balls into at least one groove made in the organ to hold the organ in position in the box and an unlocked position in which, in use, the organ can slide in the box, the lock being arranged in the box so that in the ver- rusting, the lock is supported against at least one wall (15) of the room and that in the unlocked position, the lock is moved away from said wall, the system further comprising at least one supervising member monitoring of the locking system, the monitoring body comprising a detection element (36) of this temporary contact, the sensing element (36) being a layer of electrically conductive material conductive arranged on the wall of the chamber against which the lock comes to press in the locking position.

2. A locking system according to claim 1, wherein the lock (22) is movable in translation in the chamber (12) between its position of lock and its unlock position.

3. The system of claim 2, wherein the chamber (12) extends longitudinally along a first axis (A), the lock (22) being mounted movable in the chamber along said first axis.

4. System according to one of the preceding claims, in which the lock (22) is configured to magnetically cooperate with at least a magnetic element (18) arranged in the chamber (12).

5. System according to one of the preceding claims, comprising at at least one spring (35) connected at a first end to the box (9) and to a second end to the latch (22), the spring being configured to push the lock to its locked position.

6. System according to one of the preceding claims, in which a through hole (28) is provided in the lock (22), the hole having at least a first section (29) with a section transverse of a first diameter and at least a second section {30) with a cross-section of a second diameter, the second diameter being less than the first diameter, the balls (20) being housed at least partly in the second section in the locked position and in the first section in the unlocked position.

7. System according to one of the preceding claims, wherein said layer is also magnetically insulating.

8. System according to one of the preceding claims, comprising a electrical insulation of at least two elements of the system from each other.

9. System according to claim 8, in which the electrical insulation comprises at least a first layer of electrically conductive material insulating (37) arranged between the lock (22) and at least one wall (15) of the chamber (12) with which the lock is permanently in contact.

10. | System according to claim 8 or claim 9, in which the electrical insulation comprises at least a second layer (39) in electrically insulating material arranged between the chamber (12) and, in service, the organ.

11. System according to one of claims 8 to 10, in which the wall (15) of the chamber (12) against which the lock (22) comes to bear locking position is a bottom of the chamber.

12. Drive mechanism comprising at least one actuator (2), a sliding member (7) associated at one of its ends with the actuator and a locking system (8) according to one of claims 8 to 11, the locking system allowing to block in a given position the sliding member when the lock (22) is in the locking position.

13. Wheel powered by a mechanism according to claim 12.

14. Aircraft comprising at least one wheel according to claim 13.