EP1776527A1 - Verriegelungsvorrichtung für linearaktuatoren - Google Patents
Verriegelungsvorrichtung für linearaktuatorenInfo
- Publication number
- EP1776527A1 EP1776527A1 EP05774023A EP05774023A EP1776527A1 EP 1776527 A1 EP1776527 A1 EP 1776527A1 EP 05774023 A EP05774023 A EP 05774023A EP 05774023 A EP05774023 A EP 05774023A EP 1776527 A1 EP1776527 A1 EP 1776527A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- locking
- piston rod
- elements
- locking device
- devices
- 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
Links
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
- F15B15/20—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
Definitions
- the invention relates to a locking device for linear actuators, in particular for fluid-operated adjusting devices, with an axially displaceably mounted for receiving a piston rod.
- the invention is particularly suitable for hydraulic adjusting devices which are used for safety-critical applications.
- Hydraulic locks in the form of a check valve are known from the prior art for hydraulic adjusting devices.
- check valves for locking the hydraulic adjustment are disadvantageous, since the possibility of leakage is present at each seal located in the system. A malfunction of the valve can have serious consequences.
- volume fluctuations of the hydraulic fluid are called forth by the temperature fluctuations present in flight, which in the case of hydraulic locking could lead to the escape of hydraulic fluid due to overpressure or through the entry of ambient air through negative pressure.
- the object of the present invention is to provide a locking device for linear actuators, in particular for fluid-operated adjusting devices with a piston rod axially displaceably mounted for receiving, with which a secure locking over the entire stroke of the linear actuators is possible.
- a locking device having the features of claim 1, wherein the piston rod ei ⁇ NEN extending in the axial direction cavity, in which distributed in the axial direction form-locking devices are arranged.
- positive-locking elements corresponding to the form-locking devices are arranged so as to be radially displaceable, which are mounted so as to be axially fixed in place to the receptacle.
- the positive-locking elements is associated with an actuating device which radially displaces the interlocking elements.
- a development of the invention provides that the form-locking devices are formed within the piston rod as grooves, in particular radially circumferential grooves.
- the positive locking devices are designed in the shape of slot rings which are inserted in the piston rod one behind the other.
- individual rings under defenceli ⁇ chen diameter or rings are incorporated with incorporated grooves and fixed therein. This also has the advantages of simple production and easy assembly.
- the receptacle for the piston rod is a cylinder, in particular a hydraulic or pneumatic cylinder, in which a piston fastened to the piston rod is displaceably mounted.
- the piston can be pressurized on both sides, so that the piston rod is mounted displaceably in the axial direction.
- the form-locking elements are formed radially resilient or radially spring-mounted, in order to effect a Reversibili ⁇ ity of the positive engagement easily. It is possible that the positive-locking elements are held during operation of the linear actuator under tension out of engagement with the Form gleichein ⁇ directions and that after releasing the voltage, the positive-locking elements are brought by the spring force into engagement with the Form ⁇ closing devices. Alternatively, it is provided that the positive-locking elements are disengaged in the relaxed position and brought into the form-locking engagement with the form-locking devices only by the actuating device. After removing the actuator or moving back into the Starting position spring back the form-locking elements in the relaxed Stel ⁇ ment, so that the free mobility of the actuator or the adjusting device is again given.
- the form-fitting elements are projections arranged or formed on a holder.
- the positive locking elements are slidably mounted segments that are radially displaced or radially spring-trained Federrin ⁇ ge either spring into the form-fitting devices or spring aussen out of these.
- the holder is designed as an expansion sleeve, which is provided with slots in the axial direction, so that the slotted portions are radially displaceable.
- the form-locking elements are formed or arranged on the slotted sections, preferably at the ends of the sections, so that a Ver ⁇ locking of the piston rod with respect to the holder or the recording over the entire displacement range of the piston rod is possible.
- the form-fitting elements are mounted axially stationary to the recording on the holder.
- the holder or the expansion sleeve is surrounded by the piston rod, at least in the region of the positive locking elements, so that the positive locking elements can intervene symmetrically, preferably circumferentially, within the piston rod into the positive locking devices.
- the actuation device is designed as an axially displaceable clamping cone, through which axial interlocking the interlocking elements are brought into or out of engagement with the interlocking devices of the piston rod ,
- a complementary to the clamping cone counter cone is formed on the expansion sleeve over which the Positive locking elements are held out of engagement with the Form gleich coupleden.
- the clamping cone is designed as a cap-shaped outer cone into which the counter-cone engages.
- the clamping cone is formed as an inner cone, which is inserted into a funnel-shaped counter-cone of the expansion sleeve.
- a tensioning and locking sleeve is arranged inside the expansion sleeve as a support sleeve, which in the locked state displaces into the region of the slotted sections and exercises a supportive effect.
- the tensioning cone is coupled via a spring-loaded Buchan ⁇ ker with the tension and locking sleeve, so that automatically when relieving the tension and locking sleeve is ver ⁇ pushed over a spring.
- FIG. 1 is a cross-sectional view of a hydraulic adjusting device
- Figure 3 an individual view of an expansion sleeve
- FIG. 5 - the detail D in FIG. 4.
- FIG. 1 shows a linear actuator 1, in the present case a hydraulic adjusting device, with a piston rod 10, which is displaceably guided in a receptacle 30 formed as a cylinder.
- the two ends 2, 3 of the adjusting device 1 have fastening devices which can be attached to movable objects to be stored.
- the serving as a receptacle for the piston rod 10 cylinder 30 is a hydraulic cylinder in which a piston 31, which is fastened to the piston rod 10 be ⁇ , can be moved in the direction of the double arrow.
- a holder 20 On the side facing away from the piston rod 10 side of the cylinder 30, a holder 20 is fixed, which passes through the piston 31 and projects into a hollow space 11 of the piston rod 10.
- non-illustrated form-locking elements are made ⁇ forms, which engage in likewise not shown form-fitting devices in In ⁇ neren the piston rod 10 as needed.
- the form-fitting elements of the holder 20 are out of engagement with the form-locking devices within the piston rod 10, so that the piston rod 10 is axially freely movable.
- the holder 20 is connected to the cylinder 30 or to the cylinder housing and fastened thereto, so that the form-fitting elements are fixed immovably to the cylinder housing 30 in the axial direction.
- FIG. 2 shows the detail C of FIG. 1 on an enlarged scale and shows, in a cross-sectional view, the cylinder housing 30 with the holder 20 fastened therein.
- the holder 20 has a central bore 25 in which a tie rod 43 for longitudinal movement can be displaced a pull and lock sleeve (not shown) is arranged, which is held stationary by a holding device 99.
- a tie rod 43 for longitudinal movement can be displaced a pull and lock sleeve (not shown) is arranged, which is held stationary by a holding device 99.
- Around the outer wall of the holder 20 around a base plate 32 is arranged, which is fastened to the piston 31 be ⁇ .
- the piston 31 is in turn secured to the piston rod 10, which has in its interior form-fitting devices 12.
- the Form ⁇ closing devices 12 are formed in the shape of Nutenringen which are layered behind the inside of the cavity 11 of the hollow-bore piston rod 10.
- the grooved rings 12 are held in the piston rod 10.
- the groove rings 12 form circumferential grooves.
- the piston rod 10 and the groove rings 12 are dimensioned such that the piston 31 and the base plate 32 can slide along the holder 20.
- the piston 31 in conjunction with the base plate 32 serves as a guide for the holder 20, which thereby obtains a better buckling strength.
- the expansion sleeve 20 is made of slotted sections 21, which are formed by axially extending cuts 24.
- the slotted portions 21 are radial displaced and have on their outside positive locking elements 22 in the form of elevations or pawls.
- the upper end of the expansion sleeve 20 is formed by a counter-cone 23, which tapers upwards.
- FIG. 4 shows the detail B of FIG. 1, in which the cylinder housing 30 with the piston rod 10 displaceably mounted therein can be seen.
- the Form ⁇ are closed devices 12 introduced in the form of Nutringen, alternatively, the grooves in the piston rod 10 may be incorporated.
- the grooves can be designed as threads (trapezoidal threads or the like), for example as internal threads within the piston rod 10.
- the positive locking elements can be designed as external threads on the expansion sleeve 20.
- the holder 20 Within the piston rod 10 and within the grooved rings 12, the holder 20 is guided, which is designed as a tube. In the holder 20, a pull and lock sleeve 45 is slidably mounted.
- a tie rod 43 is loaded, which is loaded via a spiral spring 45 in the direction of the cylinder-side end of the holder 20.
- the expansion sleeve shown in Figure 3 is formed, which is covered by the front end of the tie rod 43.
- the front end of the tie rod 43 is provided with a clamping cone which displaces the Jacobko ⁇ nus 23 by applying an axial force radially inwards, so that the outer diameter of the expansion sleeve 20 is reduced.
- the interlocking elements 22 are disengaged from the interlocking devices 12, so that the piston rod 10 is axially freely movable.
- FIG. 5 shows the detail D of FIG. 4, with the aid of which it can be seen that the clamping cone 40 as an actuating device displaces the countercone 23 of the expansion sleeve 20 radially inwards.
- the expansion sleeve 20 is stretched and the linear actuator 1 is free movable. If the axial holding force on the pull and lock sleeve 45 is eliminated by loosening a holding device 99, as indicated in FIG. 2, the expansion sleeve 20, due to the radial tension of the slotted sections 21, becomes seated on the counter-cone 23 Clamping cone 40 of the tie rod 43 is moved in the direction of the piston rod 10.
- the expansion sleeve 20 relaxes and the slotted Ab ⁇ sections 21 springs radially outward.
- the positive-locking elements 22 engage the form-locking devices 12 and lock the piston rod 10 in this position.
- the pawls or projections 22 are pressed by the residual stresses caused by the spring action of the slotted sections 21 and by the tension and locking sleeve 45 loaded by the helical spring which exerts a wedging action on the inner flank of the expansion sleeve 20 which is still deformed inwardly , to the Nutenringe 12. If the grooves and the projections or pawls opposite each other, there is a snap.
- the tensioning and locking sleeve 45 is moved in the opposite direction, ie in the direction of the cylinder 30, and the helical spring 44 is pretensioned. Then the tie rod 43 is positively moved by the pull and lock sleeve 45, the clamping cone 40 engages with the mating cone 23 and displaces the slotted portions 21 radially inwardly. This will End elements 22 brought out of engagement with the form-locking devices 12 and the adjusting device 1 is axially freely movable.
- the locking device can be used wherever an axial movement has to be reversibly, positively locked and as far as possible over the entire stroke.
- the arrangement of the Nutenringe 12 in succession is an extremely fine gradation of formschlüs ⁇ sigen locking possible.
- ange ⁇ within the cylinder 30 ange ⁇ arranged locking device is given a very good protection against external influences.
- the entire system is closed, so that damage due to external influences is almost impossible.
- the reversible locking at discrete positions over the entire stroke of the adjusting device 1 is ensured, so that there is also an application possibility for security-critical applications.
- the operation of the pull and lock sleeve 45 can be done by the central bore 25 of the holder 20, for example hydraulically or by electric motor.
- E- b Apart an emergency operation by a primer is possible.
- all linear actuators can be equipped with it.
- the clamping cone in such a way that it expands the expansion sleeve 20.
- displaceably mounted pawls or segments are arranged, which are ge-form-fitting manner in engagement with the Form gleich Anlagenen 12 introduced by these spring-loaded segments are pressed by a cone to the outside. If spring washers are used, these can be analogously disengaged and unlocked if necessary.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
- Lock And Its Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004039092A DE102004039092B4 (de) | 2004-08-11 | 2004-08-11 | Verriegelungsvorrichtung für Linearaktuatoren |
| PCT/DE2005/001420 WO2006015587A1 (de) | 2004-08-11 | 2005-08-11 | Verriegelungsvorrichtung für linearaktuatoren |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1776527A1 true EP1776527A1 (de) | 2007-04-25 |
| EP1776527B1 EP1776527B1 (de) | 2010-05-05 |
Family
ID=35169376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05774023A Expired - Lifetime EP1776527B1 (de) | 2004-08-11 | 2005-08-11 | Verriegelungsvorrichtung für linearaktuatoren |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7908961B2 (de) |
| EP (1) | EP1776527B1 (de) |
| AT (1) | ATE467054T1 (de) |
| BR (1) | BRPI0514304A (de) |
| CA (1) | CA2575183A1 (de) |
| DE (2) | DE102004039092B4 (de) |
| ES (1) | ES2342475T3 (de) |
| WO (1) | WO2006015587A1 (de) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006016168A1 (de) * | 2006-04-06 | 2007-10-18 | Suspa Holding Gmbh | Blockier-Vorrichtung |
| DE102008023628B4 (de) * | 2008-05-15 | 2015-10-08 | Airbus Operations Gmbh | Stellsystem für eine hydraulisch betätigbare Höhenflosse und Testverfahren zur Überprüfung der Integrität eines Stellsystems |
| DE202009011442U1 (de) * | 2009-08-25 | 2010-12-30 | Geller, Wolfgang-Peter | Vorrichtung zum lösbaren Befestigen einer Kamera an einem Trageriemen |
| CN103649301B (zh) * | 2011-11-22 | 2015-03-11 | 瑞基海洋生物科技股份有限公司 | 热对流聚合酶连锁反应装置 |
| DE102012001271A1 (de) | 2012-01-25 | 2013-07-25 | Fludicon Gmbh | Positioniereinheit |
| TWI607951B (zh) * | 2012-02-28 | 2017-12-11 | 絕對設備私人有限公司 | 鎖定式起重機,及包含該鎖定式起重機的起重系統 |
| US10366691B2 (en) * | 2017-07-11 | 2019-07-30 | Samsung Electronics Co., Ltd. | System and method for voice command context |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2210532A (en) * | 1939-10-13 | 1940-08-06 | Cleveland Rock Drill Co | Rock drill |
| US2879746A (en) * | 1955-12-08 | 1959-03-31 | Gen Motors Corp | Actuator with unidirectional locking means |
| GB922808A (en) * | 1962-01-19 | 1963-04-03 | Boulton Aircraft Ltd | Improvements in or relating to fluid pressure operated actuators |
| DE1206316B (de) | 1962-01-19 | 1965-12-02 | Boulton Aircraft Ltd | Druckmittelbetaetigter Stellmotor |
| US4240334A (en) * | 1977-12-28 | 1980-12-23 | United Hydraulics Corporation | Mechanically lockable hydraulic cylinder jack |
| DE3133117C2 (de) | 1981-08-21 | 1987-02-12 | Dornier Gmbh, 7990 Friedrichshafen | Teleskopisch längenveränderliche Stützstrebe für einziehbare Flugzeugfahrwerke |
| DE3307644A1 (de) | 1983-03-04 | 1984-09-06 | Klement, Klaus-D., 5170 Jülich | Druckmittelbetaetiger arbeitszylinder mit verriegelung in beliebiger stellungen |
| DE3807669A1 (de) | 1988-03-09 | 1989-09-21 | Andexser Lucie | Stufenlos verriegelbarer arbeitszylinder |
| DE29503736U1 (de) * | 1995-03-04 | 1995-04-27 | Schirbel, Norbert, 33758 Schloß Holte-Stukenbrock | Positioniervorrichtung zum genauen Positionieren von pneumatischen und hydraulischen Arbeitszylindern |
| DE19507689C2 (de) | 1995-03-04 | 1997-02-13 | Norbert Schirbel | Positioniervorrichtung zum genauen Positionieren von pneumatischen oder hydraulischen Arbeitszylindern |
| US5685141A (en) * | 1995-12-26 | 1997-11-11 | General Electric Company | Lock for nozzle control in the event of hydraulic failure |
| DE19806501C1 (de) * | 1998-02-17 | 1999-08-19 | Mannesmann Sachs Ag | Arretiervorrichtung zwischen zwei koaxial ineinander verschieblichen zylindrischen Bauteilen |
| JP2004322735A (ja) * | 2003-04-22 | 2004-11-18 | Nhk Spring Co Ltd | アクチュエータ |
-
2004
- 2004-08-11 DE DE102004039092A patent/DE102004039092B4/de not_active Expired - Fee Related
-
2005
- 2005-08-11 AT AT05774023T patent/ATE467054T1/de not_active IP Right Cessation
- 2005-08-11 BR BRPI0514304-7A patent/BRPI0514304A/pt not_active IP Right Cessation
- 2005-08-11 ES ES05774023T patent/ES2342475T3/es not_active Expired - Lifetime
- 2005-08-11 US US11/573,516 patent/US7908961B2/en not_active Expired - Fee Related
- 2005-08-11 EP EP05774023A patent/EP1776527B1/de not_active Expired - Lifetime
- 2005-08-11 WO PCT/DE2005/001420 patent/WO2006015587A1/de not_active Ceased
- 2005-08-11 DE DE502005009534T patent/DE502005009534D1/de not_active Expired - Lifetime
- 2005-08-11 CA CA002575183A patent/CA2575183A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006015587A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080022849A1 (en) | 2008-01-31 |
| EP1776527B1 (de) | 2010-05-05 |
| DE502005009534D1 (de) | 2010-06-17 |
| DE102004039092B4 (de) | 2008-04-24 |
| DE102004039092A1 (de) | 2006-02-23 |
| BRPI0514304A (pt) | 2008-06-10 |
| US7908961B2 (en) | 2011-03-22 |
| CA2575183A1 (en) | 2006-02-16 |
| WO2006015587A1 (de) | 2006-02-16 |
| ES2342475T3 (es) | 2010-07-07 |
| ATE467054T1 (de) | 2010-05-15 |
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