EP3569873B1 - Teleskopstellglied mit automatischer verriegelung - Google Patents

Teleskopstellglied mit automatischer verriegelung Download PDF

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Publication number
EP3569873B1
EP3569873B1 EP19175001.7A EP19175001A EP3569873B1 EP 3569873 B1 EP3569873 B1 EP 3569873B1 EP 19175001 A EP19175001 A EP 19175001A EP 3569873 B1 EP3569873 B1 EP 3569873B1
Authority
EP
European Patent Office
Prior art keywords
obstacles
rod
piston
retracted
blades
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.)
Active
Application number
EP19175001.7A
Other languages
English (en)
French (fr)
Other versions
EP3569873A1 (de
Inventor
Gilbert Lecourtier
Arnaud LE BRETON
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 EP3569873A1 publication Critical patent/EP3569873A1/de
Application granted granted Critical
Publication of EP3569873B1 publication Critical patent/EP3569873B1/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
    • 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
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • 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
    • F15B15/1409—Characterised by the construction of the motor unit of the straight-cylinder type with two or more independently movable working pistons
    • 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
    • F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • 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
    • 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
    • F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation

Definitions

  • the invention relates to a telescopic actuator with automatic locking.
  • the invention relates to a telescopic actuator equipped with a device for locking in position two movable elements relative to one another in an axial direction, for example a rod mounted to slide telescopically in a cylinder. Some actuators are fitted with a device for locking the rod in position, in particular in the retracted or extended position.
  • Claw locking devices comprise on the one hand a sleeve, most often installed on the rod, and the tubular wall of which is cut to form a certain number of elastically deformable claws which extend cantilevered in an axial direction. being terminated by hooks, and on the other hand an anchoring part provided on the cylinder, comprising an annular recess to receive the hooks.
  • the anchoring part has a step to bend the claws when the step passes under the hooks of the claws.
  • the step is followed by an annular recess in which the hooks engage to allow the claws to return to the rest position once the hooks have passed the step.
  • a locking piston which has been pushed against a return spring by the hooks when they pass over the step then moves axially to cover the hooks of the claws and thus prevent bending thereof, so that the hooks are held captive in the annular recess, which locks the actuator rod in position in the cylinder.
  • Segment locking devices for their part comprise segments mounted to move radially on the cylinder between a retracted position in which the rod is free to slide in the cylinder and an engaged position in which the segments are pushed by a piston, itself pushed by a spring, to enter a housing provided on the rod or on the associated piston. Once the rings are engaged, the piston passes over the rings to prevent them from retracting, and thus lock the rod in position on the cylinder.
  • the locking depends on the movement of a locking piston.
  • the disengagement of the locking members (hooks of the claws, segments) when the locking piston is retracted is allowed by slopes formed on the parts in contact making it possible to push back the locking members when the rod is moved in the cylinder.
  • GB 1 032 243 , US 2,702,024 and US 3,315,568 describe telescopic actuators according to the prior art.
  • the invention aims to provide a telescopic actuator equipped with an automatic locking device without a locking piston.
  • a telescopic actuator comprising a cylinder having a closed end and an open end for the passage. a hollow rod mounted to slide axially in the cylinder.
  • the actuator comprises a central support which extends from the closed end of the cylinder inside the rod and which carries obstacles that are radially movable between a retracted position leaving free sliding of the rod and a projecting position in which the obstacles are engaged in a groove of the rod to axially lock the rod relative to the cylinder, the sides of the obstacles and of the groove being shaped to prevent any removal of the obstacles by displacement of the rod, the obstacles being arranged at the end of resilient blades extending axially and arranged to return the obstacles from the retracted position to the protruding position, the central support carrying controlled means for bending the blades to cause the obstacles to be withdrawn towards the retracted position.
  • the locking is ensured automatically by the simple engagement of the obstacles in the groove of the rod under the action of the blades, the obstacles being held in position by the blades without it being necessary to confirm this engagement by a locking piston. . Any attempt to move the rod will then be blocked by the cooperation of the obstacles with the sides of the groove. Unlocking requires the prior control of the bending means of the blades, which disengages the obstacles, allowing the free movement of the rod.
  • the controlled means for bending the blades comprise an unlocking piston mounted to slide axially in the central support between a rest position in which the unlocking piston is remote from obstacles, and an unlocking position in which a hollow end conical of the unlocking piston cooperates with fingers integral with each of the obstacles to cause the bending of the blades and therefore the withdrawal of the obstacles from the protruding position to the retracted position.
  • the telescopic actuator of the invention comprises a cylinder 1 closed at one end by a sealed bottom 2 and at the other end by a drilled bottom 3 to allow a rod 4 integral with a piston 5 mounted to slide tightly to pass through the cylinder 1 along an X axis to define a hydraulic retraction chamber 6 and a hydraulic extension chamber 7.
  • the displacement of the rod 4 relative to the cylinder 1 is obtained by pressurizing one or the other of the chambers.
  • the rod 4 and the piston 5 are hollow and define an internal axial housing 8 having, at the level of the piston 5, a groove 9 with flanks substantially perpendicular to the axis X.
  • the actuator further comprises a central support 10 which extends from the sealed bottom 2 in an axial direction and onto which is screwed a locking sleeve 11, more especially visible at the figure 2 , which extends inside the axial housing 8 of the rod / piston assembly.
  • the locking sleeve 11 has a generally tubular shape terminated on one side by a bottom 12 and on the other side by a threaded end piece 13 intended to be screwed onto the central support 10.
  • the locking sleeve 11 has a tubular wall in which longitudinal blades 14 are cut to each have a first end integral with the locking sleeve 11 and a free end carrying an obstacle 15 which projects outwardly from the locking sleeve 11 when the blades 14 are at the side. idle state, as shown here.
  • a finger 16 extends longitudinally from each obstacle 15 inside the locking sleeve 11.
  • the blades 14 can flex inwardly of the locking sleeve 11 so that the obstacles 15 are returned radially to a retracted position in which they do not protrude from the outer surface of the locking sleeve 11. The blades 14 then exert a return force of the obstacles 15 towards the protruding position.
  • an unlocking piston 20 is mounted to slide tightly in the central support 10 to define there an unlocking chamber 21 which is pressurized to cause the movement of the unlocking piston 20 towards an unlocking position in which a tapered hollow end 22 of the piston cooperates with the fingers 16 to force the blades 14 to flex and thus retract the obstacles 15, so that the rod 4 is released and can slide freely, as illustrated in figure 3 .
  • a return spring 23 moves the unlocking piston 20 to a rest position in which the unlocking piston 20 is remote from the fingers 16, as illustrated in FIG. figure 1 .
  • the rod 4 is automatically locked as soon as it reaches the locking position in which the groove 9 faces the obstacles 15.
  • the obstacles 15 remain retracted by being pressed against the surface internal of the axial housing 8 of the rod 4.
  • the rod 4 comes out until the bent blades 14 push the obstacles 15 towards the protruding position in the groove 9, as soon as that -this passes opposite the obstacles 15.
  • the obstacles 15 have returned to the projecting position under the action of the blades, since the rod 4 and the piston 5 are no longer facing each other obstacles 15.
  • the invention has here been described in application to a hydraulic actuator, the invention may also be applied to an electromechanical actuator or of hybrid technology.
  • the actuation of the unlocking piston could for example be provided by a simple electromagnet.
  • the locking position is an intermediate position between the retracted position and the extended position of the actuator, the locking device of the invention can be used for ensure locking in one of these two extreme positions.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Claims (4)

  1. Teleskopisches Stellglied, umfassend einen Zylinder (1) mit einem geschlossenen Ende (2) und einem offenen Ende (3) für den Durchgang einer hohlen Stange (4), die axial verschiebbar in dem Zylinder montiert ist, wobei das Stellglied einen zentralen Träger (10) umfasst, der sich von dem geschlossenen Ende in das Innere der Stange erstreckt und der Sperrelemente (15) trägt, die radial bewegbar sind zwischen einer eingefahrenen Stellung, die ein freies Verschieben der Stange zulässt, und einer vorspringenden Stellung, in der die Sperrelemente in Eingriff mit einer Nut (9) der Stange sind, um die Stange relativ zu dem Zylinder axial zu verriegeln, wobei die Sperrelemente am Ende elastischer Lamellen (14) angeordnet sind, die sich in Längsrichtung erstrecken und angeordnet sind, um die Sperrelemente aus der eingefahrenen Stellung in die vorspringende Stellung vorzuspannen, dadurch kennzeichnet, dass die Seiten der Sperrelemente und der Nut aneinander angepasst sind, um einen gänzlichen Rückzug der Sperrelemente durch Verschieben der Stange zu verhindern, wobei der zentrale Träger Mittel zum Steuern der Biegung der Lamellen trägt, um den Rückzug der Sperrelement in Richtung der eingefahrenen Stellung zu bewirken.
  2. Teleskopisches Stellglied nach Anspruch 1, bei dem die Mittel zum Steuern der Biegung der Lamellen einen Entriegelungskolben (20) umfassen, der auf dem zentralen Träger (10) axial verschiebbar ist zwischen einer Ruhestellung, in welcher der Entriegelungskolben von den Sperrelementen entfernt ist, und einer Entriegelungsstellung, in der ein hohlkegeliges Ende (22) des Entriegelungskolben mit Fingern (16) zusammenwirkt, die fest mit den jeweiligen Sperrelementen (15) verbunden ist, um die Biegung der Lamellen und dadurch den Rückzug der Sperrelemente aus der vorspringenden Stellung in die eingefahrene Stellung zu bewirken.
  3. Stellglied nach Anspruch 1, bei dem die Stange (4) mit einem Kolben (5) verbunden ist, wobei die Nut (9) zur Aufnahme der Sperrelemente auf Höhe des Kolbens realisiert ist.
  4. Stellglied nach Anspruch 1, bei dem die Stange (4) mit einem Kolben (5) verbunden ist, der einen Rückzugkonus (25) aufweist, der die Sperrelemente (15) zwingt, beim Zurückziehen der Stange durch Verbiegen der Lamellen (14) einzufahren.
EP19175001.7A 2018-05-18 2019-05-16 Teleskopstellglied mit automatischer verriegelung Active EP3569873B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1854162A FR3081237B1 (fr) 2018-05-18 2018-05-18 Actionneur telescopique a verrouillage automatique

Publications (2)

Publication Number Publication Date
EP3569873A1 EP3569873A1 (de) 2019-11-20
EP3569873B1 true EP3569873B1 (de) 2021-09-22

Family

ID=62816796

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19175001.7A Active EP3569873B1 (de) 2018-05-18 2019-05-16 Teleskopstellglied mit automatischer verriegelung

Country Status (6)

Country Link
US (1) US10801530B2 (de)
EP (1) EP3569873B1 (de)
CN (1) CN110500336B (de)
CA (1) CA3043098C (de)
ES (1) ES2898941T3 (de)
FR (1) FR3081237B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111306139B (zh) * 2020-03-16 2021-08-20 娄底市中厚机械制造有限公司 一种多级液压缸
CN111532422B (zh) * 2020-04-17 2023-07-28 贵州新安航空机械有限责任公司 一种直升机前机轮双向液压锁定机构
CN112566436A (zh) * 2020-12-14 2021-03-26 湖南维创尚科技有限公司 一种便于维护的5g通讯设备
CN115013381B (zh) * 2022-07-02 2024-05-28 安徽工程大学 一种带有锁止功能的多级液压缸导向装置

Family Cites Families (26)

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US2297902A (en) * 1940-05-28 1942-10-06 Siam Mechanical locking device for pistons and the like
US2702024A (en) * 1950-07-24 1955-02-15 Electro Hydraulics Ltd Automatic mechanical locking device for telescopic jacks
US2851995A (en) * 1955-07-20 1958-09-16 Cleveland Pneumatic Ind Inc Lock mechanism
US3072105A (en) * 1961-07-05 1963-01-08 Lionel Pacific Inc Lock for fluid pressure actuator
GB1032243A (en) * 1964-03-09 1966-06-08 Dowty Rotol Ltd Telescopic fluid-pressure-operable jacks
US3315568A (en) * 1965-05-28 1967-04-25 Otis Eng Co Operator devices
GB1078618A (en) * 1965-08-03 1967-08-09 Hydraulic Unit Specialities Co Locking means for hydraulic control valves
US3415167A (en) * 1966-10-20 1968-12-10 Whitney J. Champagne Locking cylinder
FR2248449A1 (en) * 1973-10-18 1975-05-16 Outillage Air Comprime Spool type hydraulic distributor - slide radially floats on control rod and is locked axially
FR2402790A1 (fr) * 1977-09-08 1979-04-06 Messier Hispano Sa Verin de manoeuvre et de contreventement, a dispositif interne de verrouillage
US4188860A (en) * 1978-01-03 1980-02-19 Shafco Industries, Inc. Locking mechanism
DE4120455A1 (de) * 1991-06-21 1992-12-24 Timmer Pneumatik Gmbh Schubkolbengetriebe mit formschluessiger endlagenverriegelung
DE10207415B4 (de) * 2002-02-21 2014-01-16 Narr Beteiligungs Gmbh Hydraulischer oder pneumatischer Antrieb für einen Werkzeugspanner
DE102004030007A1 (de) * 2004-06-22 2006-03-02 Zf Friedrichshafen Ag Aktuatorvorrichtung zum Betätigen eines Verriegelungsmechanismus
CN101576102A (zh) * 2009-06-08 2009-11-11 南京晨光集团有限责任公司 机械自锁式液压缸
CN201982411U (zh) * 2011-01-17 2011-09-21 江阴市洪腾机械有限公司 一种外控式自锁液压缸
GB201109487D0 (en) * 2011-06-07 2011-07-20 Goodrich Actuation Systems Ltd Actuator with locking arrangement
DE102012004157A1 (de) * 2012-03-05 2013-09-05 Svm Schultz Verwaltungs-Gmbh & Co. Kg Verriegelungseinheit
CN203641170U (zh) * 2013-09-27 2014-06-11 北京航天发射技术研究所 钢球锁与过盈外锁复合锁紧型液压缸
CN103775431A (zh) * 2014-03-03 2014-05-07 沈阳工业大学 一种利用弹性套的可在任意位置锁紧的液压缸
CN104006032B (zh) * 2014-05-09 2016-01-20 中船重工中南装备有限责任公司 一种双向机械锁死液压缸
CN104006033A (zh) * 2014-05-09 2014-08-27 中船重工中南装备有限责任公司 一种强力机械自锁液压缸
CN104454781B (zh) * 2014-11-04 2017-05-24 长沙中联消防机械有限公司 锁紧变幅油缸、油缸控制系统、登高消防车或消防作业车
CN104405726B (zh) * 2014-11-17 2018-03-13 徐州耐克盾机械制造有限公司 一种自锁油缸
CN104500501B (zh) * 2014-12-05 2017-01-25 四川凌峰航空液压机械有限公司 液压浮动卡环锁
CN108999835A (zh) * 2018-09-21 2018-12-14 中冶赛迪工程技术股份有限公司 一种锥面式机械锁紧液压缸

Also Published As

Publication number Publication date
CN110500336A (zh) 2019-11-26
US20190353187A1 (en) 2019-11-21
US10801530B2 (en) 2020-10-13
ES2898941T3 (es) 2022-03-09
FR3081237A1 (fr) 2019-11-22
CA3043098A1 (fr) 2019-11-18
CA3043098C (fr) 2021-06-22
EP3569873A1 (de) 2019-11-20
CN110500336B (zh) 2021-04-27
FR3081237B1 (fr) 2020-12-18

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