WO2006081664A1 - Ensemble de liberation de verrou de remplacement - Google Patents

Ensemble de liberation de verrou de remplacement Download PDF

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Publication number
WO2006081664A1
WO2006081664A1 PCT/CA2006/000139 CA2006000139W WO2006081664A1 WO 2006081664 A1 WO2006081664 A1 WO 2006081664A1 CA 2006000139 W CA2006000139 W CA 2006000139W WO 2006081664 A1 WO2006081664 A1 WO 2006081664A1
Authority
WO
WIPO (PCT)
Prior art keywords
torque
pivot pin
assembly
hooking
piston
Prior art date
Application number
PCT/CA2006/000139
Other languages
English (en)
Inventor
Marc-Olivier Gagnon
Marc-André PELLETIER
Eric Therrien
Original Assignee
Héroux-Devtek Inc.
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 Héroux-Devtek Inc. filed Critical Héroux-Devtek Inc.
Priority to CA2610490A priority Critical patent/CA2610490C/fr
Publication of WO2006081664A1 publication Critical patent/WO2006081664A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C1/00—Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like
    • B64C1/14—Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers
    • B64C1/1407—Doors; surrounding frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B64C25/08—Undercarriages non-fixed, e.g. jettisonable
    • B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
    • B64C25/16—Fairings movable in conjunction with undercarriage elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C25/00—Alighting gear
    • B64C25/02—Undercarriages
    • B64C25/08—Undercarriages non-fixed, e.g. jettisonable
    • B64C25/10—Undercarriages non-fixed, e.g. jettisonable retractable, foldable, or the like
    • B64C25/18—Operating mechanisms
    • B64C25/26—Control or locking systems therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B51/00—Operating or controlling locks or other fastening devices by other non-mechanical means
    • E05B51/02—Operating or controlling locks or other fastening devices by other non-mechanical means by pneumatic or hydraulic means

Definitions

  • This invention relates to aircraft uplock assemblies in general including an emergency release mechanism for such assemblies.
  • Uplock assemblies are used on aircraft "utility door systems such as a landing gear bay, weapon bays, arresting gear systems or any other in-flight opening door systems. Uplock assemblies are designed to keep utility door systems securely in a predetermined 'locked' closed position when use of the utility doors is not needed. Certain aircraft, depending on their applications, are fitted with a plurality of uplock assemblies to open various doors to allow for ultimate operation or deployment of landing gear, weapons or other such aircraft functions.
  • a door covering an undercarriage well is opened to permit the landing gear to be deployed.
  • the door is usually open and an uplock assembly is unlatched, although on some types of aircraft the undercarriage well doors are closed when the landing gear is deployed.
  • the landing gear is typically retracted into an undercarriage well for stowage and when an indication is given that the landing gear is fully stowed, a hydraulic actuator is operated to close the undercarriage well door until a catch member of the door cooperates with a latch of an uplock assembly to prevent the unintentional opening of the door(s) during flight.
  • an uplock release assembly Prior to landing, the uplock assembly needs to be released to permit the door to open and the landing gear to be lowered and extended. The release occurs by hydraulically-aided or other means and/or with the aid of gravity. Therefore, an uplock release assembly is a device which allows an uplock assembly to go from a locked and closed position to an unlocked and opened position. Moreover, the normal uplock release assembly is referred to as the primary uplock release assembly as opposed to an alternate uplock release assembly. Back-up or emergency systems are also standard with uplock assemblies. For ease of language, a back-up or emergency release system will referred to as an alternative uplock release assembly. In the event the primary uplock release assembly should fail, an alternate unlocking means is required.
  • the primary uplock release assembly can be bypassed.
  • One way to achieve this is through the release of hydraulic fluid allowing the landing gear to move to the extended position.
  • Other alternate assemblies such as disclosed in U.S. Patent No. 6,027,070 to Zambelli use mechanical systems with cables and pulleys for sequential release of the door uplock assembly followed by release of the landing gear uplock assemblies. This particular system is mechanically complex, cumbersome and is implemented when more than one uplock needs to be actuated sequentially by some alternate means.
  • U.S. Patent No. 6,802,476 to Collet et al. discloses an alternative system comprising a first or primary actuator (eg. a motor) for normal mode operation and a second actuator for emergency operation which can enable the high torque required to unlock the hook while the assembly is under load.
  • a first or primary actuator eg. a motor
  • a second actuator for emergency operation which can enable the high torque required to unlock the hook while the assembly is under load.
  • An object of the present invention is to provide a new alternative uplock release assembly comprising: a pivot pin having a first end and a second end and an internal bore, a release system operatively connected to the first end of the pivot pin, said release system comprising a cylinder and a piston, said piston having a piston head and an elongated member passing longitudinally through said bore, said cylinder having a pressure port through which a pressure source can be fed, a hooking member, a torque member rotatably mounted at the second end of the pivot pin, a biasing system operatively connected to the torque member, said biasing system having a bias cylinder and a biasing means located within the bias cylinder, wherein biasing force is applied to the torque member, an interlocking means to enable the rotatable interconnection between the torque member and the hooking member in a locked and first position, and an engaging means to interconnect the torque member with a link member, wherein when torque is applied to the link member, the torque is transferred, via the engaging means and interlocking means
  • a further object of the present invention is to provide an alternate method for releasing a locked uplock assembly comprising a pivot pin having a first end, a second end and an internal bore, a release system operatively connected to the first end of the pivot pin, said release system comprising a cylinder and a piston, said piston having a piston head and an elongated member passing longitudinally through said bore, said cylinder having a pressure port through which a pressure source can be fed, a hooking member, a torque member rotatably mounted at the second end of the pivot pin, a biasing system operatively connected to the torque member, said biasing system having a bias cylinder and a biasing means located within the bias cylinder, wherein biasing force is applied to the torque member, an interlocking means to enable the rotatable interconnection between the torque member and the hooking member in a locked and first position, and an engaging means to interconnect the torque member with a link member, comprising the steps of: feeding pressure through the pressure port, counteracting the biasing force,
  • Yet a further object of the present invention is to provide an uplock release assembly and method of use in which the assembly comprises both a primary release as well as an alternative release as evidenced in the figures and description to follow.
  • Figure 1 shows a cut-out view of one embodiment of the hook release assembly according to the present invention.
  • Figure 2 shows a perspective view showing the inner disposition of the connection means and the interlocking means of the embodiment in Figure 1 in a locked and first position.
  • Figure 3 shows an exploded view of the embodiment in Figure 1.
  • Figure 4 shows a cut-out view of the embodiment in Figure 1 in which the torque member is coupled with the hook member in the first position in a locked and first position.
  • Figure 5 shows a cut-out view of the embodiment in Figure 1. in which the torque member is de-coupled from the hook member in the unlocked and second position.
  • Figure 6 shows a cut-out view of the embodiment in Figure 1. in which the torque member is de-coupled from the hook member in the unlocked and second position and the hook member is rotated around the pivot pin.
  • Figure 7 shows a cut-out side view of a lifting uplock assembly incorporating the embodiment in Figure 1.
  • Figure 8 illustrates a side view of an uplock assembly incorporating one embodiment of the hook release assembly according to the present invention, wherein the uplock is closed and locked.
  • Figure 9 illustrates a side view of the embodiment of Figure 8 wherein the uplock is opened.
  • Figure 10 illustrates a side internal view of the embodiment of Figure 8 wherein the uplock is closed and locked.
  • Figure 11 illustrates a side view of a non-lifting uplock assembly capable of incorporating one embodiment of the hook release assembly according to the present invention.
  • Figure 12 illustrates a perspective view of an uplock assembly incorporating one embodiment of the hook release assembly according to the present invention.
  • Figure 13 is a cross-section view of another embodiment of the hook release assembly according to the present invention in a locked and first position.
  • Figure 14 is a perspective exploded view of the embodiment illustrated in Figure 13.
  • Figure 15 is a cross-section view of the embodiment illustrated in Figure 13 during normal mode of operation of the uplock in a locked and first position.
  • Figure 16 is a cross-section view of the embodiment illustrated in Figure 13 during alternate release operation of the uplock in an unlocked and second position.
  • Figure 17 depicts a shear cartridge as used in one embodiment of the present invention.
  • Figure 18 depicts a bias cylinder as used in one embodiment of the present invention.
  • Figure 19 depicts a torque member as used in one embodiment of the present invention showing torque member projections.
  • Figure 20 depicts a link member as used in one embodiment of the present invention.
  • Figure 21 depicts a hooking member as used in one embodiment of the present invention showing hooking member projections.
  • Figure 22 depicts a support link as used in one embodiment of the present invention.
  • Figure 23 depicts a pivot pin as used in one embodiment of the present invention.
  • Figure 24 depicts a piston cylinder as used in one embodiment of the present invention.
  • Figure 25 depicts a thrust bearing as used in one embodiment of the present invention.
  • Figure 26 depicts a piston as used in one embodiment of the present invention.
  • the present invention provides a new alternative uplock release assembly for release of a hooking member 10 from an uplock assembly 2, that can be used, for example, during an emergency or following a failure of the primary uplock assembly release assembly during the normal mode of operation.
  • the alternative hook release assembly comprises a pivot pin 20 having a first end 22 and a second end 24, a release system 65, a hooking member 10, a torque member 30 rotatably mounted at the second end 24 of the pivot pin 20, a link member 40 and a biasing system 50.
  • the hooking member 10 and the torque member 30 include an interlocking means 60 enabling the rotatable interconnection between the hooking member 10 and a torque member 30 in a locked and first position.
  • the torque member 30 further includes an engaging means 32 to interconnect the torque member 30 with a link member 40 such that when torque is applied to the link member 40, the force is translated, via the engaging means 32 and interlocking means 60, to the hooking member 10 allowing the hooking member 10 to rotate around the pivot pin 20.
  • a biasing system 50 is operatively coupled to the torque member 10.
  • the biasing system 50 includes a bias cylinder 52 housing and a biasing means 54 located within the bias cylinder 52 housing to bias the torque member 30 in a locked and first position with the hooking member 30.
  • a release system 65 is operatively connected to the first end 22 of the pivot pin 20.
  • the release system 65 includes a piston cylinder 70 and a piston 72.
  • the piston 72 further comprises a piston head 74 at one end and an elongated member 76 which extends longitudinally through an internal bore 78 in the pivot pin 20.
  • the pivot pin 20 is operatively connected with the torque member 30 such that when sufficient pressure is fed into the piston cylinder 70, the piston 72 moves longitudinally towards the opposite end of the assembly and counteracts the force applied by the biasing means 54.
  • the torque member 30 moves longitudinally away from the hooking member 10, thereby decoupling the torque member 30 from the hooking member 10 from a locked and first position to an unlocked and second position. In the second position, the hooking member 10 is able to rotate around the pivot pin 20 since it is not fixed in place by the torque member 30.
  • the force applied by the biasing means 54 returns the torque member 30 towards the hooking member 10.
  • the various components of the alternative uplock release assembly can be formed from one or more metals, alloys and/or ceramics, including, but not limited to, steel, stainless steel, aluminum and titanium or any combination thereof and the outside diameter of the various components may be lined with a low friction metal, alloy or ceramic.
  • Figures 1 to 7 depict various views of one embodiment according to the present invention.
  • Figure 1 illustrates a cross-sectional view of an alternate uplock release assembly according to one embodiment of the present invention.
  • the alternate uplock release assembly includes a pivot pin 20, a release system 65, a hooking member 10, a torque member 30, a biasing system 50 and a link member 40.
  • Figures 1 and 2 show a release assembly comprising a cylindrical pivot pin 20 longitudinally disposed along a pivot axis A.
  • the pivot pin 20 includes a first end 22, a second end 24, and an internal bore 78 extending there-through from the first end 22 to the second end 24.
  • the internal bore 78 is centrally located within the pivot pin 20.
  • the pivot pin 20 further includes a means to engage with the release system 65, such as, according to one embodiment of the present invention, a plane annular flange 90 located proximate the first end 22 of the pivot pin 20.
  • the release system 65 includes a piston 72 having a piston head 74 which is received in a piston cylinder 70.
  • the piston cylinder 70 further includes a pressure port 80 (see Figures 2 and 3), and a means for receiving the pivot pin 20, such as, according to one embodiment of the present invention, a recessed annular ridge 75 along the circumference of the opening of the piston cylinder 70 (see Figure 1).
  • the piston 72 further includes an elongated member 76 passing through the internal bore 78 of the pivot pin 20, wherein said elongated member 76 is capable of translating longitudinally within said pivot pin internal bore 78.
  • the elongated member 76 includes, at the end opposite to the piston head 74, a piston stud 77 which is positioned within the torque member aperture 33 (see Figures 1 and 26).
  • the piston cylinder 70 may further comprise a mounting flange 100 ( Figures 1, 2 and 3) extending radially outwards from the opening of the piston cylinder 70.
  • the mounting flange 100 further includes mounting apertures 102 wherein fastening devices such as mounting bolts 104 (see Figure 3), may be used to mount the piston cylinder 70 to the uplock assembly.
  • Other fastening devices including but not limited to, rivets, pins or other traditional devices may also be used to mount the piston cylinder 70 to the uplock assembly 2.
  • the piston cylinder 70 can be integrally formed with an uplock assembly housing 5.
  • the piston cylinder 70 is not limited to a cylindrical shape, but rather can be of any shape or configuration which would allow to fulfill the utility explained herein.
  • piston head 74 is not limited to a circular shape.
  • the present invention comprises an overall integrated assembly where the alternative uplock release assembly and the primary uplock release assembly are combined into one assembly.
  • This integration of alternative and primary assemblies results in a functional combination that is an improvement over other assemblies that operate in a non-synergistic manner.
  • the primary release assembly and the alternative release assembly are integrated to work in a complementary fashion. Should the primary assembly not function properly, the alternative uplock release assembly overrides the primary assembly link between the linking member 40 and the hooking member 10 to achieve the desired release.
  • This complementary integration is well illustrated and described below.
  • the hooking member 10 comprises a mounting end 14 and a hook 12 ( Figures 3, 4 and 5).
  • the mounting end 14 comprises a first lateral surface, a second lateral surface 17 and an aperture 18 ( Figures 3 and 21).
  • the second lateral surface 17 further comprises an interlocking means 60 ( Figure 2) to rotationally and releasably interconnect the hooking member 10 with the torque member 30.
  • the interlocking means 60 is comprised of two or more hooking member projections 19 associated with the second lateral surface 17 surrounding the aperture 18, which are designed to complementarity mate with two or more torque member projections 35 ( Figures 3 to 6).
  • each member may be angled so as to facilitate engagement with the respective projections of the other and to minimize free play between these respective projections.
  • Other configurations wherein the hooking member 10 and the torque member 30 can releasably and complementarily mate are also contemplated.
  • the hooking member 10 rotationally mounts onto the pivot pin 20 ( Figures 1 and 3) via the aperture 18 and, in a decoupled position, is capable of independent rotation around axis A ( Figures 1 and 2).
  • a stop means positioned proximate to the hooking member 10 can limit the degree of rotation of the hooking member 12 to a desired amount.
  • the stop means can be an actuating end 42 of the link member 40.
  • the hooking member 10 comprises a plurality of hooks 12.
  • a plurality of hooks might add stability and strength to the uplock assembly 2.
  • the torque member 30 comprises a cylinder having a first end, second end, and an internal bore 31 at the first end wherein the torque member internal bore 31 extends longitudinally the length of the torque member 30 to the second end of the torque member 30 for translationally connecting with the pivot pin 20.
  • the torque member 30 further comprises a means to matingly interlock or couple with the projections 19 of the hooking member 10, thereby providing a means for rotational interconnection.
  • the means to interlock comprises one or more torque member projections 35 extending along axis A ( Figures 1 and 2) to form a rotational interlock with the hooking member projections 19, thereby creating an interlocking means 60 ( Figure 2).
  • the outer circumference of the cylinder wall of the torque member 30 further comprises an engaging means 32 to slidably connect and rotationally interlock with the link member 40.
  • the connection means is provided by one or more keys 34 on the torque member 30 which can matingly connect to one or more keyways 36 formed in the link member 40 ( Figure 3).
  • the engaging means 32 comprises a plurality of radially positioned trapezoidal ridges around axis A ( Figures 1 and 2) which extend outwardly from the outer circumference of the cylinder wall of the torque member 30.
  • the torque member 30 is mounted proximate to the second end 24 of the pivot pin 20 and receives said pivot pin 20 within the torque member internal bore 31, wherein the torque member 30 is capable of sliding along and, independently, rotating around axis A ( Figures 1 and 2).
  • the biasing system 50 includes a biasing means 54 disposed within a bias cylinder 52.
  • the bias cylinder 52 includes an opening at one end to bias the torque member 30 into a coupled position with the hooking member 10.
  • the biasing means 54 can be any device with resilient means, for example, one or more metal springs, elastomer springs, BellevilleTM washers, concentric compression return springs, detent mechanisms or any other suitable device that achieves this same means.
  • the torque member 30 In a first coupled position, the torque member 30 is biased into an interlocked orientation with the hooking member 10 such that the torque member 30 and the hooking member 10 are rotationally coupled. In the first coupled position (during normal operation), torque applied to the link member 40 will transfer via the engaging means 32 and the interlocking means 60 to rotate the hooking member 10 interlocked to the torque member 30 around axis A ( Figures 1 and 2).
  • the bias cylinder 52 ( Figures 1 to 7, and 18) may further comprise a mounting flange 101 extending radially outwards from the opening of the bias cylinder 52.
  • the mounting flange 101 further includes mounting apertures 103 wherein fastening devices such as mounting bolts 104 ( Figures 3 and 7), may be used to mount the bias cylinder 52 to the uplock assembly 2.
  • Other fastening devices including but not limited to, rivets, pins or other traditional means may also be used to mount the bias cylinder 52 to the uplock assembly 2.
  • a first flange bushing 110 is mounted on the uplock assembly housing 5 to receive the pivot pin 20 proximate to its first end 22.
  • One or more spacers 114 can be mounted between the first flange bushing 110 and the hooking member 10.
  • a second bushing 112 is mounted on the uplock assembly housing 5 to receive the torque member 30 proximate to its second end between the link member 40 and the biasing system 50.
  • biasing means 54 is not limited to a circular shape.
  • the link member 40 links the alternative uplock release assembly to an actuating means 43 of the uplock assembly 2 ( Figure 7).
  • the link member 40 can take many shapes or designs depending on the design of the uplock assembly 2 and size constraints or requirements, as long as it provides a linking means.
  • the link member 40 comprises a link member actuating end 42 and an opposite torque member end 44 (see Figures 2, 3, 4 and 20).
  • the torque member end 44 comprises an engaging means 32 ( Figures 1 and 2) to slidably connect and rotationally interlock with the torque member 30.
  • the engaging means 32 is provided by one or more link member keyways 36 that mate with the one or more torque member keys 34 -located on the torque member 30.
  • the keyways 36 have an alternate configuration which mates with the corresponding torque member keys 34 of an alternatively configured torque member 30.
  • the means to slidably connect with the torque member 30 includes an annular aperture having a plurality of radially formed trapezoidal ridges on its inner circumference which can mate with the trapezoidal ridges on the torque member 30 to form a rotational interlock capable of providing translational movement.
  • the actuating end 42 comprises a means to pivotally connect the link member 40 to the uplock actuating means 43 of the uplock assembly 2.
  • a pivotal connection means is an aperture for receiving a pivotal connection 46 (Figure 7), for example, but not limited to, a pin, bolt or stud.
  • pressurized fluid for example, hydraulic fluid or pressurized air or other gas or liquids
  • pressurized fluid is fed into the piston cylinder 70 to longitudinally move the piston head 74 within the piston cylinder 70 along axis A ( Figures 1 and 2).
  • One embodiment of the present invention provides for an hydraulic pump that feeds hydraulic fluid into the piston cylinder 70 through the pressure port 80 ( Figures 2 and 3), thereby moving the piston head 74.
  • the piston 72 in turn, translationally engages with the torque member 30 thereby sliding the torque member 30 along the pivot pin 20 from a first coupled position shown in Figure 4 to a second decoupled position shown in Figure 5, thereby decoupling the mating interlocking means 35 of the torque member 30 from the interlocking means 19 of the hooking member 10, and allowing the hooking member 10 to rotate freely.
  • Other embodiments of the present invention can use different translational pressure sources to cause the piston 72 to translationally engage with the torque member 30 thereby sliding the torque member 30 along the pivot pin 20 from a first coupled position to a second decoupled position.
  • Such translational pressure sources may be activated by means including but not limited to hydraulic, pneumatic, chemical (exothermic or endothermic), magnetic, mechanical (automatically or manually activated) and electromechanical means.
  • An exothermic chemical means could involve and explosive chemical reaction to push the piston 72 and an endothermic means could involve a contracting chemical reaction to pull the piston 72.
  • the bias force from the biasing means 54 automatically moves the torque member 30 into the first position to recouple the torque member 30 and the hooking member 10 when there is a decrease in pressure such as when the pressurized fluid is released from the pressure port 80 and the hooking member projections 19 and the mating torque member projections 35 are aligned.
  • the mating hooking member projections 19 of the hooking member 10 can be recoupled to the mating torque member projections 35 of the torque member 30 by repositioning or rotating the hooking member, for example through manual movement of the hooking member 10 into a mating position.
  • the hooking member 10 Upon the decoupling of the hooking member 10 and the torque member 30, the hooking member 10 is urged into the unlocked position, through rotation around the pivot pin 20.
  • This urging of the hooking member 10 can be provided by a door preload, for example, where the door associated with the uplock assembly 2 is spring-loaded against its frame, thereby forcing the hooking member 10 into the unlocked position once it is allowed to rotate around the pivot pin 20.
  • gravitational force or a second biasing system associated with hooking member 10 could assist the rotation of hooking member 10 around the pivot pin 20.
  • the hooking member 30 may rotate around the pivot pin 20 to the unlocked position based on the force of gravity and, as such, the optimum orientation for the alternate uplock release assembly is for axis A to be substantially perpendicular to the force of gravity.
  • bushings 110, 112, spacers 114, bearings 116 and/or washers 118 may be added to support, guide, or align any of the components of the present invention.
  • a combination of such devices can be used at different locations throughout the alternate uplock release assembly to also minimize operational interference and surface wear between components, without departing from the present description of the invention.
  • the alternative uplock release assembly can be integrated within the uplock assembly 2 or, alternatively, it can be complementarily adapted to an existing uplock assembly 2.
  • Figure 8 illustrates a side view of an uplock assembly 2 incorporating one embodiment of the alternative uplock release assembly, wherein the hooking member 10 is in a locked and first position.
  • Figure 9 illustrates a side view of the embodiment of Figure 8 wherein the hooking member 10 is in a second opened position.
  • Figure 10 illustrates a side internal view of the embodiment of Figure 8 , wherein the hooking member 10 is in a locked and first position.
  • Figure 11 illustrates a side view of a non-lifting uplock assembly 2 capable of incorporating one embodiment of the alternative uplock release assembly according to the present invention.
  • Figure 12 illustrates a perspective view of an uplock assembly 2 incorporating one embodiment of the alternate uplock release assembly according to the present invention.
  • the embodiment represented in Figure 12 shows the relative positioning of the uplock assembly 2 and components of the alternate uplock release assembly such as the hooking member 10, the hook 12, the hydraulic pressure port 80, the bias cylinder 52, the mounting flange 101, the mounting bolts 104 and an optional shear cartridge 125.
  • the shear cartridge 125 also shown at Figure 17, is provided to offer increased protection against a potential sudden increase in the pressure through the pressure port 80 which would tend to extend the piston 72.
  • the shear cartridge 125 comprises a shear pin sized to resist the maximum pressure spike condition.
  • the shear cartridge 125 needs to be replaced with a new one before future use can occur if the pressure exceeded the maximum pressure associated with the shear pin.
  • the alternative uplock release assembly is located at the pivot point of the hooking member 10 and is mounted externally on the side of the uplock assembly 2, facilitating the shear cartridge 125 replacement.
  • FIGS 13 to 16 illustrate another embodiment of the alternative uplock release assembly according to the present invention.
  • the alternative uplock release assembly is comprised of a torque member 30 engaging into a lateral surface 17 of the hooking member 10 and sliding inside a link member 40.
  • the torque member 30 incorporates a set of torque member projections 35 serving a dual purpose; it allows the torque member 30 to engage a set of complementary hooking member projections 19 on the lateral surface 17 of the hooking member 10 allowing the torque member 30 to become operatively connected to the link member 40 and to slide inside the link member 40.
  • a support link 41 can be incorporated to add further support against loads encountered during the normal operation of the uplock and to avoid detrimental deflections of components of the alternative uplock release assembly.
  • the piston cylinder 70 is pressurized by the pressure source fed through the pressure port 80, thus forcing the piston 72 to move the torque member 30 against two concentric compression return springs (inner return spring 55 and outer return spring 56). This is in effect disengaging the torque member 30 from the hooking member 10 allowing it to rotate freely around the hook pivot pin 22 thus by-passing any condition which might be preventing the uplock to open under its normal mode of operation.
  • the relative position X of the piston head 74 in said emergency operation is illustrated in Figure 16.
  • the piston cylinder 70 incorporates a pressure port 80 depicted as a beam seal type fitting AS 1986-04. Other types of pressure ports could alternatively be used depending on the hydraulic or other connections used with the alternate uplock release assembly.
  • the piston cylinder 70 is mounted onto the side of the uplock housing and retained with three standard bolts.
  • the piston 72 can incorporate a lightning hole at one end and a groove on the piston head 74 outside diameter to allow for the installation of an elastomeric seal 73 compatible with the type of hydraulic fluid (or other substance used to pressurize the piston 72) used with the alternate uplock release assembly.
  • the bias cylinder 52 incorporates a pair of concentric compression return springs (55, 56) to provide a pre-load force maintaining the torque member 30 engaged with the hooking member 10.
  • the compression return springs (55, 56) are sitting against a thrust bearing 116 to allow for free rotation of the torque member 30 during normal uplock operation.
  • a shear cartridge 125 is provided to offer increased protection against a potential pressure spike in the pressure source, which would tend to extend the piston 72.
  • the shear cartridge 125 comprises a shear pin sized to resist the worst case pressure spike condition. In the event that an alternate release of the uplock is activated, the shear cartridge 125 needs to be replaced before the next alternate release of the uplock.
  • the uplock housing 5 is fitted with a pair of flange bushings 110 composed of a suitable alloy such as an aluminum-nickel-bronze alloy, to minimize wear and friction.
  • the hook pivot pin 22 is made of a high strength steel alloy and is coated with a self-lubricant TeflonTM based liner to minimize wear and friction. Other known self-lubricant materials can also be used.
  • the torque member 30 is made of a high strength bronze alloy offering good wear characteristics and a low coefficient of friction. During normal operation of the uplock, the torque member 30 rotates inside the flange bushing 110 with the rotation of the hooking member 10. During an alternate release of the uplock, torque member 30 longitudinally translates inside the same flange bushing 110 to compress the two return springs (55, 56). It would be understood by a worker skilled in. the art that many other materials and alloys, sharing similar characteristics, could also be used to make the aforementioned components without departing from the scope of the present invention.
  • a series of washers 118 can be used at different locations in the alternate uplock release assembly to control running clearances and minimize surface wear between various components thereof.
  • the alternative uplock release assembly has the ability to reset itself either in-flight or on the ground by: 1) depressurizing the release system 65 and 2) conducting a normal opening of the uplock (after the failure condition preventing the normal mode to be used has been corrected). Once the torque member projections 35 are aligned with the hooking member projections 19, the torque member 30 will retract and re-engage under the load of the compression return spring (55, 56).
  • Figures 17 to 26 depict individual components of an embodiment of the alternate uplock release assembly according to the present invention.
  • Figure 17 depicts a shear cartridge 125 as used in one embodiment of the present invention.
  • the shear cartridge 125 operatively connected to the piston cylinder 70, is provided to offer increased protection against a potential pressure spike in the pressure source which would tend to extend the piston 72.
  • Figure 18 depicts a bias cylinder 52 as used in one embodiment of the present invention.
  • the bias cylinder 52 is operatively connected to and houses the biasing means 54.
  • Figure 19 depicts a torque member 30 as used in one embodiment of the present invention.
  • the torque member 30 has torque member projections 35 and its functionality has been previously explained in the description of various embodiments of the present invention above.
  • Figure 20 depicts a link member 40 as used in one embodiment of the present invention.
  • the link member 40 comprises a link member actuating end 42 and link member keyways 36; its functionality has been previously explained in the description of various embodiments of the present invention above.
  • Figure 21 depicts a hooking member 10 as used in one embodiment of the present invention.
  • the hooking member 10 comprises a hook 12 and hooking member projections 19; its functionality has been previously explained in the description of various embodiments of the present invention above.
  • Figure 22 depicts a support link 41 as used in one embodiment of the present invention its utility is explained in the description of various embodiments of the present invention above.
  • Figure 23 depicts a pivot pin 22 as used in one embodiment of the present invention and as described above.
  • Figure 24 depicts a piston cylinder 70 as used in one embodiment of the present invention.
  • the piston cylinder 70 comprises mounting flange 100, mounting apertures 102 and a pressure port 80; its functionality has been previously explained in the description of various embodiments of the present invention above.
  • Figure 25 depicts a thrust bearing 116 as used in one embodiment of the present invention and described above.
  • Figure 26 depicts a piston 72 as used in one embodiment of the present invention.
  • the piston 72 comprises a piston head 74 an elongated member 76 and a piston stud 77; its functionality has been previously explained in the description of various embodiments of the present invention above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

L'invention se rapporte à un nouvel ensemble de libération de verrou de remplacement. L'ensemble comprend un axe d'articulation ayant une première extrémité et une deuxième extrémité ainsi qu'un alésage interne, un système de libération relié fonctionnel à la première extrémité de l'axe d'articulation, ledit système de libération comprenant un cylindre et un piston, ledit piston possédant une tête de piston et un élément allongé traversant ledit alésage longitudinalement, ledit cylindre possédant un orifice de refoulement pouvant être alimenté par une source de pression. L'ensemble comprend également un élément de retenue, un élément de couple monté rotatif sur la deuxième extrémité de l'axe d'articulation, un système de polarisation relié à l'élément de couple, ledit système de polarisation possédant un cylindre de polarisation et des moyens de polarisation situés à l'intérieur du cylindre de polarisation. Lorsque que la force de polarisation est appliquée à l'élément de couple, un moyen de verrouillage permet de relier par rotation l'élément de couple à l'élément de retenue dans une première position verrouillée et un moyen d'enclenchement permet de relier l'élément de couple à un élément de liaison. Lorsque le couple est appliqué à l'élément de liaison, le couple est transféré par le biais des moyens d'enclenchement et de verrouillage à l'élément de retenue et entraîne la rotation de l'élément de retenue autour de l'axe d'articulation. Dans un autre mode de fonctionnement, l'orifice de refoulement est alimenté par de la pression, le piston compense la force de polarisation entraînant ainsi le déplacement de l'élément de couple longitudinalement par rapport à l'axe d'articulation suffisamment pour découpler l'élément de couple et l'élément de retenue de ladite première position verrouillée de manière à passer dans une deuxième position déverrouillée permettant à l'élément de retenue de pivoter autour de l'axe d'articulation.
PCT/CA2006/000139 2005-02-03 2006-02-03 Ensemble de liberation de verrou de remplacement WO2006081664A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2610490A CA2610490C (fr) 2005-02-03 2006-02-03 Ensemble de liberation de verrou de remplacement

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US65038105P 2005-02-03 2005-02-03
US60/650,381 2005-02-03
CA2,496,103 2005-02-03
CA2496103 2005-02-03

Publications (1)

Publication Number Publication Date
WO2006081664A1 true WO2006081664A1 (fr) 2006-08-10

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EP2305560A3 (fr) * 2008-03-18 2011-04-13 Eurocopter Deutschland GmbH Dispositif pour ouvrir une porte passager en cas d'urgence
WO2012039850A2 (fr) * 2010-09-20 2012-03-29 International Business Machines Corporation Procédé d'amélioration des propriétés mécaniques d'interconnexions à semi-conducteurs comprenant des nanoparticules
FR2986502A1 (fr) * 2012-02-08 2013-08-09 Messier Bugatti Dowty Boitier de commande
US8893368B2 (en) 2011-06-21 2014-11-25 Airbus Operations Limited Pivot joint assembly
EP3566944A1 (fr) * 2013-09-10 2019-11-13 Safran Landing Systems UK Limited Train d'atterrissage d'aéronef avec verrou
US20220120050A1 (en) * 2019-02-18 2022-04-21 Stiesdal Offshore Technologies A/S Structural joint for offshore constructions and a method for the assembly of such offshore frame constructions and use of such structural joint

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CA2260672A1 (fr) * 1998-02-06 1999-08-06 Normalair-Garrett (Holdings) Limited Dispositif de verrouillage position rentre
US6802476B2 (en) * 2002-03-04 2004-10-12 Messier-Bugatti Latch device, in particular for latching an airplane landing gear or an airplane landing gear hatch, and a method of operating said device
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EP0265197A2 (fr) * 1986-10-24 1988-04-27 Dowty Rotol Ltd. Ensemble de verrouillage
CA2260672A1 (fr) * 1998-02-06 1999-08-06 Normalair-Garrett (Holdings) Limited Dispositif de verrouillage position rentre
US6802476B2 (en) * 2002-03-04 2004-10-12 Messier-Bugatti Latch device, in particular for latching an airplane landing gear or an airplane landing gear hatch, and a method of operating said device
WO2005005252A1 (fr) * 2003-07-08 2005-01-20 Smiths Group Plc Mecanismes de verrouillage

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8881524B2 (en) 2008-03-18 2014-11-11 Airbus Helicopters Deutschland GmbH Device for opening a passenger door in case of emergency
EP2305560A3 (fr) * 2008-03-18 2011-04-13 Eurocopter Deutschland GmbH Dispositif pour ouvrir une porte passager en cas d'urgence
WO2012039850A2 (fr) * 2010-09-20 2012-03-29 International Business Machines Corporation Procédé d'amélioration des propriétés mécaniques d'interconnexions à semi-conducteurs comprenant des nanoparticules
WO2012039850A3 (fr) * 2010-09-20 2012-06-07 International Business Machines Corporation Procédé d'amélioration des propriétés mécaniques d'interconnexions à semi-conducteurs comprenant des nanoparticules
EP2538096A3 (fr) * 2011-06-21 2016-11-16 Airbus Operations Limited Assemblage de joint pivotant
US8893368B2 (en) 2011-06-21 2014-11-25 Airbus Operations Limited Pivot joint assembly
EP2626764A1 (fr) * 2012-02-08 2013-08-14 Messier-Bugatti-Dowty Boîtier de commande
US9139280B2 (en) 2012-02-08 2015-09-22 Messier-Bugatti-Dowty Control box
US9193434B2 (en) 2012-02-08 2015-11-24 Messier-Bugatti-Dowty Control box
FR2986502A1 (fr) * 2012-02-08 2013-08-09 Messier Bugatti Dowty Boitier de commande
EP3566944A1 (fr) * 2013-09-10 2019-11-13 Safran Landing Systems UK Limited Train d'atterrissage d'aéronef avec verrou
EP3584158A1 (fr) * 2013-09-10 2019-12-25 Safran Landing Systems UK Limited Train d'atterrissage d'aéronef avec ensemble de verrou
US10569863B2 (en) 2013-09-10 2020-02-25 Safran Landing Systems Uk Ltd Lock and aircraft landing gear assembly
US11242137B2 (en) 2013-09-10 2022-02-08 Safran Landing Systems Uk Ltd Lock and aircraft landing gear assembly
US20220120050A1 (en) * 2019-02-18 2022-04-21 Stiesdal Offshore Technologies A/S Structural joint for offshore constructions and a method for the assembly of such offshore frame constructions and use of such structural joint

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