EP1448900A1 - Klemmvorrichtung und stelleinrichtung - Google Patents
Klemmvorrichtung und stelleinrichtungInfo
- Publication number
- EP1448900A1 EP1448900A1 EP02787823A EP02787823A EP1448900A1 EP 1448900 A1 EP1448900 A1 EP 1448900A1 EP 02787823 A EP02787823 A EP 02787823A EP 02787823 A EP02787823 A EP 02787823A EP 1448900 A1 EP1448900 A1 EP 1448900A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- clamping device
- clamping
- screw plate
- rod
- 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
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
Definitions
- the present invention relates to a clamping device with the features of the preamble of claim 1 and an actuating device, in particular a working cylinder, with a piston rod.
- Clamping devices for axially moving rods for example piston rods of working cylinders or also stationary rods, are known. Such a clamping device is described in DE 37 07 046 AI. Clamping devices of this type are connected to a moving component or device with respect to the rod to be clamped, and the clamping force is generated, for example, by means of a tensioning piston with an inner cone and a clamping sleeve with an outer cone. Since the level of the clamping force is directly dependent on the level of the spring force, spring assemblies made of disc springs are used in the prior art for high holding and clamping forces, which, depending on the requirements, consist of alternately stacked single or multiple layered disc springs and are arranged coaxially ,
- the operation with high forces is as follows. To release the clamping sleeve from the rod, the tensioning piston is moved with hydraulic pressure against the spring force of the spring device, so that the clamping sleeve is no longer acted upon on its outer cone and the rod is thus free. The hydraulic pressure is released to apply the clamping effect, ie to apply pressure to the outer cone of the clamping sleeve. distant, so that the spring force of the spring device can be effective.
- associations concerned with job security such as the employer's liability insurance association
- any effective locking / holding device for presses and injection molding machines demand that even if a spring breaks, the safety function must not be lost, i.e. the holding force of the clamping device and thus the force path is retained.
- compliance with this cooperative requirement is essential and decides on the approval and release of a clamping device.
- clamping devices to meet this requirement have been designed with a clamping jaw arrangement which enables a hydraulically driven piston rod to be safely intercepted.
- a jaw arrangement is known, for example, from DE-OS 23 33 491.
- a disadvantage of the known jaw assemblies is that, in practice, wedges often occur when the jaws are used due to the forces that occur, which, depending on the size of the forces that have occurred and intercepted, can only be solved again with great effort can and not infrequently - with excessive wedging - lead to damage or even destruction of the device.
- the invention proposes a clamping device with the features of claim 1 and an actuating device with a spring device or clamping device according to the invention.
- Screw plate springs per se are known from DE 29 16 446 AI. These are two coil springs that are wound upright and obliquely to the central axis, which are screwed into each other in the opposite direction in such a way that the flat band of the spring windings, which is inclined towards one another after screwing into one another, is stressed like a plate spring column.
- the clamping device according to the invention with helical disc springs has the great advantage that no spring travel is lost even in the event of a spring break, and the set spring force is thus retained virtually unchanged.
- This property gives a clamping device in which the holding force is generated by spring force a high degree of functional reliability, so that, for example, the regulations of the professional association for the use of spring-acting locking / holding devices for hydraulic presses and injection molding machines when using screw plate fields are met are.
- the preload is reduced by up to 10%, which results in a correspondingly lower release pressure, since practically no spring friction occurs.
- the one-piece production from strip material with an uninterrupted fiber course has a favorable effect on the service life of the spring element.
- the one-piece design results in assembly advantages, and there is no risk of confusion when layering the single-disc springs into the spring assembly.
- An arrangement according to the invention of a plurality of helical disc springs proves to be particularly advantageous axially parallel around the circumference of the rod to be clamped. With this arrangement, a required total spring force is divided among a plurality of springs. This allows springs with a relatively small diameter to be used even in applications that require a high preload force.
- This arrangement according to the invention makes it possible in the first place To use helical disc springs for such applications, because helical disc springs are only supplied as single springs up to a size of approx. 50 mm rod diameter. With this solution, it is now possible to realize very large spring-acting clamping devices.
- rotations can be provided in the tensioning piston and / or in a cover of the clamping device for receiving one or both of the ends of the at least one screw plate spring.
- local recesses with a circular segment-shaped plan are provided in a bore of the housing that receives the spring device.
- the at least one screw plate spring is guided by a bolt which only guides the screw plate spring on its inner diameter in the region of the ends of the spring.
- the at least one screw plate spring is arranged coaxially with the rod to be clamped. With this configuration, clamping devices up to a bar diameter of at most 50 mm can be designed in a simpler manner.
- the at least one helical plate spring acts directly on the clamping sleeve, the outer cone of which acts on an assigned inner cone of the housing and the inner diameter of which decreases in the locked state due to the axial displacement, resulting in the moving rod being clamped.
- Figure 1 shows a schematic representation of a longitudinal section through a clamping device according to the invention.
- Figure la shows a longitudinal section through a clamping device according to the invention according to Figure 1, two different embodiments of the arrangement of a helical spring column are shown on both sides of the longitudinal center line.
- Figure 2 shows a schematic representation of a longitudinal section through a clamping device known from the prior art.
- FIG. 3 shows a top view of a clamping device according to the invention with helical disc springs distributed around the circumference.
- Figure 3a shows a cross section through the clamping device of Figure la at the level of the screw plate springs.
- Figure 4 shows a side view of a partially cut screw plate spring, which is guided only in the area of its spring ends on its inner diameter by a bolt.
- Figure 5 shows a side view of a partially cut screw plate spring, which is guided only in the area of its spring ends on its outer diameter in a bore / recess.
- FIG. 6 shows a longitudinal section through a clamping device with a screw plate spring arranged coaxially to the rod to be clamped.
- FIG. 2 shows a clamping device as it is known from the prior art, in particular from DE 37 070 46 AI.
- the known clamping device 8 has a three-part Housing 9 in which a rod 10 can be clamped by means of a clamping sleeve 11. This clamping takes place via a tensioning piston 12 which is provided with a prestressing force by acting on a coaxially arranged plate spring assembly 13.
- the clamping sleeve 11 is released by means of a pressure medium supply to the tensioning piston 12, the force exerted by the pressure medium counteracting the prestressing force of the spring assembly 13.
- the disc spring package is thus under permanent preload both in the clamping and in the release position, i.e. all plate springs forming the plate spring package are preloaded by the same amount, the preload being higher in the release position. Since the disc springs are connected in series, each spring releases the full preload force on the tensioning piston in a single layering.
- FIG. 1 shows a longitudinal section through a clamping device 1 according to the invention.
- the clamping device 1 according to the invention also consists of a three-part housing 2, in which a rod 3 can be clamped by means of a clamping sleeve 4. This clamping takes place via a tensioning piston 5, which is surrounded by several around the circumference of the rod 3 axially parallel screw plate springs is acted upon.
- the axially parallel to the rod 3 arranged plate springs 6 generate the necessary preload.
- Adjusting disks 7 are provided for setting the prescribed pretensioning force and are inserted between the individual screw plate spring column and the tensioning piston 5.
- Figure la shows a longitudinal section through a clamping device according to the invention, two different exemplary embodiments for the arrangement and guidance of the screw plate spring columns being shown on both sides of the longitudinal center line.
- a recess 21 with a circular section-like outline is provided in a tube 24 forming the housing wall or the housing jacket, into which screw plate springs 6 'protrude with a part of their circumference.
- the recesses 21 make it possible to use helical disc springs with a larger diameter, which means that, with the same size of the clamping device housing, i. same external dimensions of the clamping device, the use of screw plate springs with a larger diameter and thus the generation of a larger biasing force is possible.
- FIG. 3a A top view of the described configuration with the recesses 21 with a circular section-like plan is shown in FIG. 3a.
- FIG. la Another embodiment is shown in the figure la to the right of the longitudinal center line.
- the cover 20 of the clamping device is provided with recesses 22 in which the ends of the screw plate spring columns 6 "are accommodated. This makes it possible to use longer screw plate springs 6", again with the same external dimensions of the clamping device.
- a plan view of this embodiment is also shown in Figure 3a, to the right of the longitudinal center line.
- the screw plate springs 6, 6 ', 6 are guided, for example, by means of bolts arranged coaxially in the interior of the screw plate springs.
- these guide bolts are provided with projecting shoulders in the area of the ends 14, 15 of the screw plate springs, the outer diameter of which corresponds approximately to the inner diameter of the screw plate springs so that it is guided by the pin 18 only in the area of the spring ends 14, 15 (see FIG. 4), which considerably reduces the friction.
- Figure 6 finally shows a longitudinal section through a clamping device according to the invention, in which a screw Lerfeder 19 is arranged coaxially to the rod 3 to be clamped.
Landscapes
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Springs (AREA)
- Clamps And Clips (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Finger-Pressure Massage (AREA)
- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Vehicle Body Suspensions (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10158844 | 2001-11-27 | ||
DE10158844A DE10158844A1 (de) | 2001-11-27 | 2001-11-27 | Klemmvorrichtung und Stelleinrichtung |
PCT/EP2002/013304 WO2003046389A1 (de) | 2001-11-27 | 2002-11-26 | Klemmvorrichtung und stelleinrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1448900A1 true EP1448900A1 (de) | 2004-08-25 |
EP1448900B1 EP1448900B1 (de) | 2005-03-09 |
Family
ID=7707562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02787823A Expired - Lifetime EP1448900B1 (de) | 2001-11-27 | 2002-11-26 | Klemmvorrichtung und stelleinrichtung |
Country Status (10)
Country | Link |
---|---|
US (1) | US8028615B2 (de) |
EP (1) | EP1448900B1 (de) |
CN (1) | CN100366924C (de) |
AT (1) | ATE290653T1 (de) |
AU (1) | AU2002352149A1 (de) |
DE (2) | DE10158844A1 (de) |
ES (1) | ES2237705T3 (de) |
PT (1) | PT1448900E (de) |
UA (1) | UA74099C2 (de) |
WO (1) | WO2003046389A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008057052B4 (de) | 2008-08-29 | 2011-06-16 | Benteler Automobiltechnik Gmbh | Vorrichtung zur aktiven Spurlenkung von Fahrzeugrädern |
DE102008057053B4 (de) | 2008-08-29 | 2011-03-10 | Benteler Automobiltechnik Gmbh | Vorrichtung zur aktiven Spurlenkung von Fahrzeugrädern |
DE102009041907B4 (de) * | 2009-09-20 | 2015-01-22 | Günther Zimmer | Brems- und/oder Klemmvorrichtung mit formsteifem Zentralkörper |
DE202012101018U1 (de) * | 2012-03-22 | 2013-06-25 | Franz Fuchs | Kompakttellerfeder |
FR3049963B1 (fr) | 2016-04-12 | 2020-05-22 | Matisa Materiel Industriel S.A. | Systeme d'arrimage d'un appareil de voie ferree equipe d'un mecanisme d'arrimage, vehicule et procede de transport associes |
CN106701534B (zh) * | 2017-01-01 | 2019-04-05 | 重庆科技学院 | 一种细胞划痕实验盖的使用方法 |
CN106520525B (zh) * | 2017-01-01 | 2019-03-05 | 重庆科技学院 | 一种细胞划痕实验盖 |
DE102018216736A1 (de) * | 2018-09-28 | 2020-04-02 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Verdrehsicherung |
DE202019100248U1 (de) * | 2019-01-17 | 2020-04-20 | Berg & Co. Gmbh | Klemmvorrichtung |
CN110388349B (zh) * | 2019-06-28 | 2020-06-09 | 威海立新液压气动机械有限公司 | 一种操作稳定性高的液压缸体 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1135586A (en) * | 1914-09-02 | 1915-04-13 | George Gunby Jordan | Tool for compressing tappet-valve springs. |
DE1804857B2 (de) * | 1968-10-24 | 1971-11-25 | Hänchen, Siegfried, 7304 Ruit | Vorrichtung zur klemmung einer axial verschiebbaren kolben stange |
US3575087A (en) | 1968-11-18 | 1971-04-13 | Lourdes Ind Inc | Locking cylinder |
US3995534A (en) * | 1973-06-30 | 1976-12-07 | Adolf Rastetter | Safety arrester for arresting a hydraulically operated lifting ram of a hydraulic elevator |
DE3118449A1 (de) * | 1981-05-09 | 1982-12-02 | Sitema Gesellschaft für Sicherheitstechnik und Maschinenbau mbH, 7500 Karlsruhe | "klemmvorrichtung" |
DE3523676A1 (de) | 1985-07-03 | 1987-01-08 | Roehrs Werner Dr Kg | Seilklemmenversetzgeraet |
DE3707046A1 (de) | 1987-03-05 | 1988-09-15 | Haenchen Kg Herbert | Klemmvorrichtung fuer stangen |
DE4126897A1 (de) * | 1991-08-14 | 1993-02-18 | Rexroth Mannesmann Gmbh | Hydraulisches klemmsystem |
ATA183292A (de) * | 1992-09-15 | 1996-06-15 | Hoerbiger Ventilwerke Ag | Hydraulikzylinder |
US5540135A (en) * | 1994-12-27 | 1996-07-30 | Advanced Machine & Engineering Co. | Device for clamping an axially movable rod |
JPH10141324A (ja) * | 1996-11-06 | 1998-05-26 | Kosmek Ltd | 旋回式クランプ装置 |
US5791230A (en) * | 1997-04-18 | 1998-08-11 | Advanced Machine & Engineering Co. | Rod clamping device for a linear fluid actuator |
JP3856934B2 (ja) * | 1998-01-27 | 2006-12-13 | Smc株式会社 | ロック機構付き流体圧シリンダ |
US6152268A (en) * | 1998-12-21 | 2000-11-28 | Advanced Machine & Engineering Co. | Rod clamp apparatus |
-
2001
- 2001-11-27 DE DE10158844A patent/DE10158844A1/de not_active Withdrawn
-
2002
- 2002-11-26 PT PT02787823T patent/PT1448900E/pt unknown
- 2002-11-26 AU AU2002352149A patent/AU2002352149A1/en not_active Abandoned
- 2002-11-26 US US10/496,813 patent/US8028615B2/en not_active Expired - Fee Related
- 2002-11-26 DE DE50202445T patent/DE50202445D1/de not_active Expired - Lifetime
- 2002-11-26 EP EP02787823A patent/EP1448900B1/de not_active Expired - Lifetime
- 2002-11-26 ES ES02787823T patent/ES2237705T3/es not_active Expired - Lifetime
- 2002-11-26 CN CNB028235762A patent/CN100366924C/zh not_active Expired - Fee Related
- 2002-11-26 UA UA20040503897A patent/UA74099C2/uk unknown
- 2002-11-26 AT AT02787823T patent/ATE290653T1/de active
- 2002-11-26 WO PCT/EP2002/013304 patent/WO2003046389A1/de not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO03046389A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1448900B1 (de) | 2005-03-09 |
US8028615B2 (en) | 2011-10-04 |
US20110107907A1 (en) | 2011-05-12 |
DE50202445D1 (de) | 2005-04-14 |
CN100366924C (zh) | 2008-02-06 |
ES2237705T3 (es) | 2005-08-01 |
ATE290653T1 (de) | 2005-03-15 |
DE10158844A1 (de) | 2003-06-12 |
AU2002352149A1 (en) | 2003-06-10 |
PT1448900E (pt) | 2005-07-29 |
WO2003046389A1 (de) | 2003-06-05 |
CN1596344A (zh) | 2005-03-16 |
UA74099C2 (en) | 2005-10-17 |
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