EP1495233B1 - Systeme de commande de contraction a actionnement fluidique - Google Patents

Systeme de commande de contraction a actionnement fluidique Download PDF

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Publication number
EP1495233B1
EP1495233B1 EP03746284A EP03746284A EP1495233B1 EP 1495233 B1 EP1495233 B1 EP 1495233B1 EP 03746284 A EP03746284 A EP 03746284A EP 03746284 A EP03746284 A EP 03746284A EP 1495233 B1 EP1495233 B1 EP 1495233B1
Authority
EP
European Patent Office
Prior art keywords
contraction
tube
retaining arms
drive according
clamping
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.)
Expired - Lifetime
Application number
EP03746284A
Other languages
German (de)
English (en)
Other versions
EP1495233A1 (fr
Inventor
Bernd Lorenz
Stefan Schwarz
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.)
Festo SE and Co KG
Original Assignee
Festo SE and Co KG
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 Festo SE and Co KG filed Critical Festo SE and Co KG
Publication of EP1495233A1 publication Critical patent/EP1495233A1/fr
Application granted granted Critical
Publication of EP1495233B1 publication Critical patent/EP1495233B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B15/10—Characterised by the construction of the motor unit the motor being of diaphragm type
    • F15B15/103—Characterised by the construction of the motor unit the motor being of diaphragm type using inflatable bodies that contract when fluid pressure is applied, e.g. pneumatic artificial muscles or McKibben-type actuators

Definitions

  • the invention relates to a fluid-operated contraction drive, with a contraction tube, which undergoes a length contraction upon fluid loading of a limited Beauftschungsraumes and which is equipped at its two end regions each with a tap of the generated driving force permitting Kraftabgriffsappel, wherein at least one end portion of the contraction tube has flat shape and is clamped between two retaining arms of a fork-like clamping head of the associated Kraftabgriffsussi, wherein the opposite hose wall sections are pressed together with their inner surfaces and wherein fastening means are provided which are fixed to the support arms and engage positively in the clamped end portion of the contraction hose.
  • WO 00/61952 A1 and EP 0161750 B1 each disclose a fluid-actuated contraction drive which contains a contraction tube to which a respective force-tapping unit is fastened on the front side.
  • the contraction tube includes a rubber elastic tube body and a coaxially with respect to this Switzerlandturaan eleven. If the pressurization chamber, which is limited by the contraction tube, is filled with fluid pressure medium under a certain actuation pressure, the contraction tube undergoes a radial expansion in conjunction with an axial length contraction. As a result, tensile forces are exerted on the force tapping units, so that they are applied in the sense of mutual rimpedement. In this way, external structures and components, which are fixed to the Kraftabgriffsawaen, clamped together and / or moved relative to each other.
  • a contraction drive of the type mentioned in which in addition to a Einspannbefest Trent positive fastening measures between the clamping head and the associated end portion of the contraction tube are provided.
  • the transferable from the contraction tube to the Kraftabgriffsech tensile forces are particularly high.
  • the attachment measures consist of fastening bolts that pass through the contraction tube.
  • the flat shape of the clamped end region of the contraction tube is expediently based on a compression of the hollow cylindrical contraction tube which is altogether hollow prior to the attachment of the force tapping unit.
  • the flat shape of the Schlauchend Schemees also has the advantage that the connection area between the contraction tube and the Kraftabgriffsech can be performed in a very flat, compact design overall.
  • the tooth-like projections may be integrally formed, for example, by punching and bending out of the material of the support arms.
  • the fastening means may include at least one fastening bolt fixed to the two retaining arms and passing through the intermediate end portion of the contraction hose, for example at least one screw or at least one rivet.
  • the clamping forces required for the clamping of the end portion can be achieved solely by a corresponding bias of the retaining arms based on their choice of material and / or shape.
  • tensioning means may be formed by the aforementioned fastening means.
  • the contraction tube expediently consists of a tubular body with rubber-elastic properties, in the wall of which a tensile fiber arrangement is embedded in a coaxial arrangement.
  • the Switzerlandfaseranix can also sit on the outer circumference of the hose body.
  • the tension fiber arrangement expediently consists of a plurality of tensile fibers arranged crosswise with high tensile strength and at the same time bendable properties. Due to the flexibility, the turnover of the contraction tube at the respective end region is not hindered.
  • the arrangement is suitably made such that the fastening means engage in the Switzerlandfaseran nie the contraction tube.
  • the drawing shows a fluid-operated contraction drive indicated generally by reference numeral 1. It can be operated with liquid or, preferably, with a gaseous medium.
  • An essential component of the contraction drive 1 is a hose-like membrane element designated as a contraction hose 2, which essentially consists of a hose body 3 made of rubber-elastic material and a tension fiber arrangement 4 arranged coaxially with the hose body 3.
  • the Switzerlandfaseran extract 4 could enclose the hose body 3 like a stocking. It is preferably embedded in the wall of the hose body, so that it represents a tubular unit with this.
  • the contraction tube 2 is closed in a fluid-tight manner. This limits one towards the environment hermetically sealed, elongated Beauftschungsraum 7.
  • a power tabgriffshim 8 attached at each end portion 5, 6 is a power tabgriffshim 8 attached.
  • the Kraftabgriffsstoff 12 are formed by one or more holes that allow, for example, a sterbefest Trent or suspension device of the mentioned components.
  • the force tapping units 8 arranged at the two end regions 5, 6 occupy a maximum distance from one another.
  • the contraction tube 2 in this case has a certain initial length.
  • the Beauftschungsraum 7 is depressurized.
  • the admission chamber 7 is acted upon by a fluid pressure medium under a predetermined operating pressure.
  • This pressure medium can be fed in via a fluid line 13 communicating with the admission chamber 7.
  • the fluid feed takes place through the wall of the hose body 3, which is equipped with suitable connection means 14 for this purpose.
  • a gas-actuated contraction drive it would also be possible, in particular in the case of a gas-actuated contraction drive, to generate the drive gas in the interior of the admission space 7 through a pyrotechnic gas generator (not shown).
  • the loading chamber 7 Upon activation, the loading chamber 7 is subjected to an internal pressure, so that the contraction tube 2 is radially expanded. This radial expansion is accompanied by an axial shortening of the hose length. As a result, the force tapping units 8 are pulled toward each other.
  • the tension fiber arrangement 4 has a multiplicity of individual or strands of fibers 4 that are combined to form a crossover configuration.
  • the Buchfaseran extract forms in particular a grid-like structure.
  • the grid angles change, so that a tensile force is caused by the contraction tube 2 at the two end regions 5, 6 '.
  • the contraction tube 2 could also have another, the described performance guaranteeing structure.
  • the contraction tube 2 is distinguished by a special embodiment of its two end regions 5, 6 and the force tapping unit 8 fixed thereto. This is explained in more detail below with reference to the end region 5 on the left in FIG. 1, which is shown enlarged in FIGS. 2 to 4.
  • the design at the other end region 6 is expediently identical. However, it is also possible to provide deviating designs at the two end regions.
  • the contraction tube 2 has at its end region 5 flat shape. This is achieved in particular by virtue of the fact that a contraction tube 2 possessing a hollow cylindrical shape from the outset is compressed at opposite ends by this end region 5, so that diametrically opposite tube wall sections 11a, 11b abut with their inner surfaces flat and tight against each other.
  • the Kraftabgriffsussi 8 includes a Kraftabgriffsteil 19, the contraction tube 2 facing front portion forms a fork-like designed clamping head 18.
  • the clamping head 18 has two preferably plate-like designed retaining arms 22, 23 which are adjacent to each other with mutually parallel expansion planes, wherein they define a clamping gap 24 between them.
  • the contraction tube 2 engages with its flat shape having end portion 5 in the clamping space 24 and is acted upon from opposite sides by the two support arms 22, 23 and firmly pressed together. In this way, the contraction tube 2 is frictionally clamped in its end region 5 in the fork-like clamping head 18.
  • the holding arms 22, 23 each act on their associated hose wall section 11a or 11b, which consequently has a flat shape, wherein the hose wall sections 11a, 11b are pressed together tightly with their mutually facing inner surfaces.
  • the resulting sealing area is indicated at 25 in FIGS. 3 and 6.
  • the two retaining arms 22, 23 are expediently formed integrally with each other. They merge into one another in a root region 26, to which a force tapping portion 27, which projects axially away from the contraction hose 2, adjoins, which is equipped with the force tapping means 12.
  • the Kraftabgriffsabêt 27 is plate-like flat formed in all embodiments and includes one or more holes passing through it, which form the Kraftabgriffsstoff 12.
  • the frictional clamping of the end portion 5 results solely from the mutual bias of the support arms 22, 23, on the basis of their choice of materials and the design of the clamping head 18.
  • the holding arms 22, 23 take one another approximate starting position.
  • they are briefly spread apart by force application, so that the clamping gap 24 is widened.
  • the holding arms 22, 23 are released, firmly squeezing the end portion 5 due to their need to return to the starting position.
  • the clamping head 18 has expediently in this context on elastic properties.
  • clamping means 28 serve here one or more fastening bolts 32, which are fixed with their respective two ends to the support arms 22, 23 and arranged in the clamping gap 24 Pass through end portion 5 of the contraction tube 2. They are expediently screws or rivets, which are supported with their heads on the side facing away from the clamping gap 24 outside of the respective holding arm 22, 23 and exert in this way the desired clamping force or clamping force on the support arms 22, 23.
  • a particularly high security against slipping out of the contraction tube 2 from the clamping head 8 is achieved by additional positive fastening measures.
  • Such positive fastening measures result in the embodiment of FIGS. 1 to 4, among others, from the fastening bolts 32 provided there. They penetrate the end section 5, which has been correspondingly perforated beforehand. Since the tensile fiber assembly 4 is penetrated, results in a particularly secure connection.
  • FIGS. 5 and 6 show the fastening means according to the invention which are fixed to the retaining arms 22, 23 and which engage positively in the clamped end region 5 of the contraction tube 2. They consist of tooth-like projections 33 which protrude from the clamping space 24 facing the inner surface of the respective holding arm 22, 23 in the clamping space 24 inside. As is clearly evident from FIG. 5, they engage in a form-fitting manner into the contraction tube 2. Expediently, the arrangement is such that the tooth-like projections 33 provided on a respective holding arm 22, 23 merely dip into the directly impacted tube wall section 11a, 11b.
  • the tooth-like projections 33 may in particular be formed of one-piece material components of the holding arms 22, 23 and be produced in that they are punched out of this material and bent out.
  • the tooth-like projections can be pressed out of the holding arms during the mutual pressing of the two holding arms. Prefers They taper in a wedge shape so that they can reliably penetrate into the rubber-elastic tube material.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supports For Pipes And Cables (AREA)
  • Clamps And Clips (AREA)

Claims (10)

  1. Système d'entraînement à contraction actionné par fluide, comportant un tuyau flexible de contraction (2), qui subit une contraction en longueur lorsqu'une chambre de sollicitation (7), qu'il délimite, est sollicitée par un fluide et dont chacune de ses zones d'extrémité (5, 6) est munie d'une unité de prélèvement de force (8) permettant de prélever la force d'entraînement générée, au moins une zone d'extrémité (5, 6) du tuyau flexible de contraction (2) ayant une forme plate et étant serrée entre deux bras de retenue (22, 23) d'une tête de serrage (18) en forme de fourche, les deux tronçons de paroi (11a, 11b) situés face à face du tuyau flexible étant étroitement comprimés l'un contre l'autre par leurs faces intérieures et des moyens de fixation (32, 33) étant prévus, lesquels sont fixés aux bras de retenue (22, 23) et s'engagent par conjugaison de forme dans la zone d'extrémité (5, 6) enserrée du tuyau flexible de contraction (2), caractérisé en ce que les moyens de fixation sont formés au moins en partie par des saillies (33) en forme de dents des bras de retenue (22, 23).
  2. Système d'entraînement à contraction selon la revendication 1, caractérisé en ce que le tuyau flexible de contraction (2) est une structure en forme de cylindre creux, la forme plate d'au moins une de ses zones d'extrémité (5, 6) étant due au serrage dans la tête de serrage (18) en forme de fourche.
  3. Système d'entraînement à contraction selon la revendication 1 ou 2, caractérisé en ce que les deux bras de retenue (22, 23) de la tête de serrage (18) sont réalisés d'un seul tenant l'un avec l'autre.
  4. Système d'entraînement à contraction selon l'une des revendications 1 à 3, caractérisé en ce que les deux bras de retenue (22, 23) sont réalisés en forme de plaques.
  5. Système d'entraînement à contraction selon l'une des revendications 1 à 4, caractérisé en ce que les saillies (33) en forme de dents sont découpées dans le matériau des bras de retenue (22, 23) et sont pliées.
  6. Système d'entraînement à contraction selon l'une des revendications 1 à 5, caractérisé en ce que les moyens de fixation comprennent, en outre, au moins un boulon de fixation (32) fixé aux deux bras de retenue (22, 23) et traversant de part en part la zone d'extrémité (5, 6) du tuyau flexible de contraction (2), maintenue entre lesdits bras de retenue.
  7. Système d'entraînement à contraction selon la revendication 6, caractérisé en ce qu'au moins un boulon de fixation (32) est formé par une vis ou un rivet.
  8. Système d'entraînement à contraction selon l'une des revendications 1 à 7, caractérisé en ce que les deux bras de retenue (22, 23) délimitent un intervalle de serrage (24), dans lequel le tuyau flexible de contraction (2) s'engage par sa zone d'extrémité (5, 6) à forme plate, les deux bras de retenue (22, 23) étant précontraints à partir de côtés opposés contre la zone d'extrémité (5) du tuyau flexible de contraction (2), par l'intermédiaire de moyens de serrage (28) qui passent à travers l'intervalle de serrage (24).
  9. Système d'entraînement à contraction selon l'une des revendications 1 à 8, caractérisé en ce que le tuyau flexible de contraction (2) comporte un corps tubulaire (3), réalisé dans un matériau élastique, et un système de fibres soumises à traction (4), disposé coaxialement au corps tubulaire (3) et avantageusement noyé dans la paroi du corps tubulaire (3).
  10. Système d'entraînement à contraction selon la revendication 9, caractérisé en ce que le système de fibres soumises à traction (4) est formé par des fibres soumises à traction agencées selon une configuration croisée.
EP03746284A 2002-04-12 2003-04-04 Systeme de commande de contraction a actionnement fluidique Expired - Lifetime EP1495233B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20205655U DE20205655U1 (de) 2002-04-12 2002-04-12 Fluidbetätigter Kontraktionsantrieb
DE20205655U 2002-04-12
PCT/EP2003/003511 WO2003087588A1 (fr) 2002-04-12 2003-04-04 Systeme de commande de contraction a actionnement fluidique

Publications (2)

Publication Number Publication Date
EP1495233A1 EP1495233A1 (fr) 2005-01-12
EP1495233B1 true EP1495233B1 (fr) 2006-06-14

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ID=7969930

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03746284A Expired - Lifetime EP1495233B1 (fr) 2002-04-12 2003-04-04 Systeme de commande de contraction a actionnement fluidique

Country Status (3)

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EP (1) EP1495233B1 (fr)
DE (2) DE20205655U1 (fr)
WO (1) WO2003087588A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE345447T1 (de) * 2004-05-26 2006-12-15 Festo Ag & Co Durch fluidbeaufschlagung aktivierbare betätigungseinrichtung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932111A (en) * 1959-09-07 1963-07-24 Henry Harrison Merriman End fittings for fluid actuators
JPS4898279A (fr) * 1972-03-30 1973-12-13
DE2711699A1 (de) 1977-03-17 1978-09-21 Repapress Ag Endverschluss
DE2802716A1 (de) * 1978-01-23 1979-07-26 Horst Jansen Druckbehaelter fuer fluids, pasten o.dgl.
WO1986006802A1 (fr) 1985-05-13 1986-11-20 Georg Hirmann Unite de puissance
DE29906626U1 (de) 1999-04-14 1999-07-15 Festo AG & Co, 73734 Esslingen Betätigungseinrichtung

Also Published As

Publication number Publication date
DE50303838D1 (de) 2006-07-27
DE20205655U1 (de) 2002-07-04
WO2003087588A1 (fr) 2003-10-23
EP1495233A1 (fr) 2005-01-12

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