EP3611389A1 - Lineares stellglied mit verriegelung und verriegelungsanzeige - Google Patents

Lineares stellglied mit verriegelung und verriegelungsanzeige Download PDF

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Publication number
EP3611389A1
EP3611389A1 EP19190472.1A EP19190472A EP3611389A1 EP 3611389 A1 EP3611389 A1 EP 3611389A1 EP 19190472 A EP19190472 A EP 19190472A EP 3611389 A1 EP3611389 A1 EP 3611389A1
Authority
EP
European Patent Office
Prior art keywords
locking
finger
indicator
rod
locking finger
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.)
Granted
Application number
EP19190472.1A
Other languages
English (en)
French (fr)
Other versions
EP3611389B1 (de
Inventor
Christelle PETTENAZZI
Laurent MONSAINT
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
Publication of EP3611389A1 publication Critical patent/EP3611389A1/de
Application granted granted Critical
Publication of EP3611389B1 publication Critical patent/EP3611389B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F15B19/005—Fault detection or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1428—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/87—Detection of failures

Definitions

  • the invention relates to a telescopic locking actuator and locking indicator.
  • Telescopic actuators for example hydraulic cylinders comprising a body in which a rod is slidably mounted along a sliding axis, and comprising a locking member for automatically locking the rod on the body when the rod arrives in one extreme positions.
  • the finger is mounted mobile on the body along a locking axis perpendicular to the sliding axis between a locking position towards which it is pushed back by a spring to penetrate a groove in the rod, and a position retracted in which it is pushed against the spring by the pressurized fluid admitted into the chamber of the jack into which the finger opens.
  • a sleeve is movably mounted on the body along the sliding axis between a retracted position in which it is pushed by the rod when the latter approaches the locking position, and a finger retaining position in the retracted position in which the sleeve is pushed by a spring to be placed under the finger which has been retracted by the pressurized fluid.
  • the invention aims to propose a linear actuator with finger locking, the indication member of which makes it possible to detect a non-locking even if the finger seems to be in the locking position.
  • a telescopic actuator comprising a body in which a rod is slidably mounted along a sliding axis, the actuator comprising a locking member comprising a locking finger movable in a locking direction. perpendicular to the sliding axis between a locking position in which one end of the locking finger is engaged in a groove of the rod to lock the rod in position, and a retracted position in which the end of the finger is released from the groove to release the rod, a locking indicator being mounted integral with the locking finger to be movable between a locking indicator position when the locking finger is in the locking position and an unlocking indicator position when the locking finger is in the position retracted.
  • the locking indicator is secured to the locking finger by a link which can be broken during cutting of the end of the finger while the rod is locked, a thrust spring being disposed in the finger to push the lock indicator to the unlock indicator position when said link is broken.
  • the locking indicator delivers reliable information even if the finger is broken, by appearing in the unlocking indicator position even when the end of the finger has been cut off and the locking finger remains in the unlocked position.
  • the indicator is associated with a fragile support which extends into a bore of the locking finger so as to be linked to the end of the latter.
  • the severing of the end leads to the rupture of the fragile support, and therefore the separation of the locking indicator, which can therefore be moved by the thrust spring.
  • a telescopic actuator in this case a hydraulic cylinder 1 comprising a hollow body 2 in which a rod 3 associated with a piston 4 is mounted to slide in sealed manner in the body 1 along a sliding axis X to define a full chamber 5 extending between the piston 4 and a solid bottom of the body (not visible here), and an annular chamber 6 extending between the piston 4 and a drilled bottom 7 through which the rod 3 protrudes.
  • the piston 4 has a groove 8 to receive the end 9 of a locking finger 10 mounted for leaktight sliding along a locking axis Y perpendicular to the sliding axis X in a housing 11 of the body 1 between a locking position illustrated in figure 1 in which the end 9 is engaged in the groove 8 to block the rod 3 in the extended position, and a retracted position illustrated in figures 2 and 3 in which the end 9 is released from the groove 8, thereby releasing the rod 3.
  • the locking finger 10 is returned to the locking position by a locking spring 12 resting on a plug 13 closing the housing 11.
  • the locking finger 10 is pushed into the retracted position when pressurized fluid is admitted into the annular chamber 6.
  • a sleeve 14 is placed in the body 1 to slide along the sliding axis X between a withdrawal position towards which it is pushed by the piston 4 against a return spring 15 when the rod 3 is in the locked position, as illustrated in the figure 1 , and a locking position illustrated in figure 3 wherein the sleeve 14 is pushed by the return spring 15 while the locking finger 10 is in the retracted position to hold it there and lock it in this position even when the annular chamber 6 is no longer under pressure.
  • the locking finger 10 is associated with a locking indicator 20 which, as visible on the figure 1 , protrudes from the plug 13 to be visible from the outside.
  • the locking indicator 20 is integral with a rod 26 engaged in a central bore 21 of the locking finger 10.
  • the rod 26 is extended by a fragile support 22 of reduced section which ends in a foot 23 which is secured to the locking finger 10 at the end 9 thereof by a rod 24.
  • a thrust spring 25 extends around the rod 26 in a housing 27 of the locking finger 10 while resting on a bottom of the housing 27 and a shoulder of the indicator 10 to push the indicator 20 outwards. In the situation illustrated here, the rod 24 retains the locking indicator 20 against the thrust spring 25.
  • the rod 3 can move in the body 2, which has the effect of allowing the sleeve 14 to move towards the locking position under the action of the return spring 15 to hold the locking finger 10 in position retracted, as illustrated in figure 3 .
  • the locking indicator 20 is thus kept in the unlocking indicator position.
  • the rod 3 returns to the extended position, until the sleeve 14 is pushed against the spring 15 and thus allows the end 9 of the locking finger 10 to enter the groove 8 under the action of the locking spring 12 to lock the rod 3.
  • the locking indicator 20 returns to the locking indicator position.
  • the load coupled to the rod can exert on the rod 3 a significant force while the rod 3 is in the locked position.
  • the force is so great that it causes the locking finger 10 to break by cutting off its end 9. The rod 3 is thus released, while the locking finger 10 remains in the locked position, as illustrated in figure 4 .
  • the rupture of the end 9 of the locking finger 10 simultaneously causes the rupture of the fragile support 21, so that the connection between the locking indicator 20 and the locking finger 10 is broken.
  • the locking indicator 20 thus released is pushed back to the unlocking indicator position by the pushing spring 25, even though the locking finger 10 remains in the locked position. This arrangement prevents the locking indicator from providing a locking indication when in practice, the rod 3 is released.
  • the locking indicator 20 is used to actuate a return 30 carrying a target 31 which moves opposite a detector 32 between a position close to the detector 32, as illustrated in FIG. figure 6 , which corresponds to the locking indicator position, and a position remote from the detector 32, as illustrated in figures 7 to 9 , which corresponds to the unlocking indicator position, so that the detector 32 generates an electrical signal taking two distinct values, which makes it possible to distinguish the two witness positions.
  • the reference 30 is articulated on a pivot 33 integral with the plug 13 and extending in an oblong opening 34 of the reference 30.
  • the reference 30 is also articulated on a collar 35 directly tightened on the external end of the locking indicator 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Actuator (AREA)
EP19190472.1A 2018-08-17 2019-08-07 Lineares stellglied mit verriegelung und verriegelungsanzeige Active EP3611389B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1857529A FR3085061B1 (fr) 2018-08-17 2018-08-17 Actionneur lineaire a verrouillage et temoin de verrouillage

Publications (2)

Publication Number Publication Date
EP3611389A1 true EP3611389A1 (de) 2020-02-19
EP3611389B1 EP3611389B1 (de) 2021-07-07

Family

ID=65201105

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19190472.1A Active EP3611389B1 (de) 2018-08-17 2019-08-07 Lineares stellglied mit verriegelung und verriegelungsanzeige

Country Status (5)

Country Link
US (1) US10830260B2 (de)
EP (1) EP3611389B1 (de)
CN (1) CN110836211B (de)
ES (1) ES2887702T3 (de)
FR (1) FR3085061B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI903555B (zh) * 2024-06-07 2025-11-01 日揚科技股份有限公司 具備上鎖掛牌功能的氣壓缸

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702024A (en) * 1950-07-24 1955-02-15 Electro Hydraulics Ltd Automatic mechanical locking device for telescopic jacks
US4887944A (en) * 1980-01-29 1989-12-19 Lucas Industries Public Limited Company Fuel injection pump including plunger setting device
CN2758546Y (zh) * 2004-12-28 2006-02-15 烟台兴德气动机械有限公司 机械锁紧式液压缸
EP2300319A2 (de) * 2008-06-13 2011-03-30 Airbus Operations Zylindervorrichtung für flugzeugfahrwerk

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3359862A (en) * 1966-02-25 1967-12-26 Mcdowell Wellman Eng Co Piston locking means
CN203035637U (zh) * 2012-11-26 2013-07-03 无锡恒立威士气动技术有限公司 铁路矿车车箱上盖用锁紧气缸
US9291176B2 (en) * 2013-01-30 2016-03-22 Messier-Dowty Inc. Locking mechanism for locking an actuator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702024A (en) * 1950-07-24 1955-02-15 Electro Hydraulics Ltd Automatic mechanical locking device for telescopic jacks
US4887944A (en) * 1980-01-29 1989-12-19 Lucas Industries Public Limited Company Fuel injection pump including plunger setting device
CN2758546Y (zh) * 2004-12-28 2006-02-15 烟台兴德气动机械有限公司 机械锁紧式液压缸
EP2300319A2 (de) * 2008-06-13 2011-03-30 Airbus Operations Zylindervorrichtung für flugzeugfahrwerk

Also Published As

Publication number Publication date
US20200056637A1 (en) 2020-02-20
EP3611389B1 (de) 2021-07-07
ES2887702T3 (es) 2021-12-27
FR3085061A1 (fr) 2020-02-21
CN110836211A (zh) 2020-02-25
US10830260B2 (en) 2020-11-10
FR3085061B1 (fr) 2021-01-22
CN110836211B (zh) 2021-07-27

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