EP0143163B1 - Combination of bolt and loop - Google Patents

Combination of bolt and loop Download PDF

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Publication number
EP0143163B1
EP0143163B1 EP84107953A EP84107953A EP0143163B1 EP 0143163 B1 EP0143163 B1 EP 0143163B1 EP 84107953 A EP84107953 A EP 84107953A EP 84107953 A EP84107953 A EP 84107953A EP 0143163 B1 EP0143163 B1 EP 0143163B1
Authority
EP
European Patent Office
Prior art keywords
loop
bolt
fiber
fibre
combination
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
Application number
EP84107953A
Other languages
German (de)
French (fr)
Other versions
EP0143163A1 (en
Inventor
Rudolf Dr. Wörndle
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.)
Airbus Defence and Space GmbH
Original Assignee
Messerschmitt Bolkow Blohm AG
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 Messerschmitt Bolkow Blohm AG filed Critical Messerschmitt Bolkow Blohm AG
Publication of EP0143163A1 publication Critical patent/EP0143163A1/en
Application granted granted Critical
Publication of EP0143163B1 publication Critical patent/EP0143163B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/18—Band-type slings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/54—Flexible member is joint component

Definitions

  • the invention relates to a connection according to the preamble of the claim.
  • the invention is therefore based on the object to rule out overloading of the plastic matrix or breaks thereof (as a result of radial loop material pressures) in practically all applications of a connection of the type mentioned.
  • a basic structure is selected from unidirectional glass or the like fiber rovings or fiber strands in a synthetic resin or the like, which extend in the loop circumferential direction. Since this loop 2 is at the same time exposed to high radial pressures in the respective pin wrapping area, additional fiber cover and fiber inserts 3 and 4 are provided here in connection with the synthetic resin matrix, with a fiber orientation in each case in the direction of the pin extension, thereby causing a contraction of the synthetic resin matrix in this direction of the loop To offer resistance.
  • the fiber cover and fiber inlays 3 and 4 can consist of a woven fabric or the like, for example with a 0/90 ° fiber orientation, in which case only fibers in one direction inevitably fulfill the aforementioned purpose.
  • U.U. a -45 ° fiber orientation can also be selected with respect to the longitudinal axis of the bolt.
  • the use of isotropic fiber material is also not excluded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Connection Of Plates (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Ropes Or Cables (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

Die Erfindung betrifft eine Verbindung gemäß dem Oberbegriff des Patentanspruchs.The invention relates to a connection according to the preamble of the claim.

Bei einer derartigen Verbindung kommt es unter Zugkraftbelastung in Schlaufenerstreckungsrichtung, insbesondere bei großer Schlaufendicke, zu hohen radialen Pressungen des Schlaufenmaterials im Grenzbereich von Schlaufe und Bolzen mit der Gefahr von Brüchen. Denn solche Pressungen haben Querkontraktionen der Kunststoffmatrix zur Folge, welche zum Herausquetschen von Matrixmaterial aus dem Faserverbund und damit zum Matrixbruch führen können. Das ließe sich durch einen die Schlaufe im Umschlingungsbereich verspannenden Beschlag verhindern.Die hierdurch erreichbare Belastbarkeitssteigerung ist jedoch, wie sich gezeigt hat, für besondere Anwendungsfälle hochbelasteter Verbindungen, z. B. für Geräteaufhängungen bei Satelliten, unzureichend.With a connection of this type, high radial pressures of the loop material occur in the border region of the loop and the bolt with the risk of breakage under tensile force loading in the loop extension direction, in particular with a large loop thickness. Such pressings result in cross-contractions of the plastic matrix, which can lead to squeezing of matrix material out of the fiber composite and thus to the matrix breaking. This could be prevented by a fitting bracing the loop in the looping area. However, the increase in resilience that can be achieved in this way is, as has been shown, for special applications of highly stressed connections, e.g. B. for device hangers on satellites, insufficient.

Der Erfindung liegt daher die Aufgabe zugrunde, praktisch in allen Anwendungsfällen einer Verbindung der eingangs genannten Art eine Überlastung der Kunststoffmatrix bzw. Brüche derselben (infolge radialer Schlaufenmaterialpressungen) auszuschließen.The invention is therefore based on the object to rule out overloading of the plastic matrix or breaks thereof (as a result of radial loop material pressures) in practically all applications of a connection of the type mentioned.

Diese Aufgabe ist gemäß dem Kennzeichen des Patentanspruchs gelöst, nämlich durch einen Faserstoffaufbau des Umschlingungsbereiches der Schlaufe, bei dem zusätzliche Faserlagen eine Kontraktion der Kunststoffmatrix in Bolzenerstreckungsrichtung verhindern bzw. zumindest behindern und damit die Festigkeit der Schlaufe im Bereich des Bolzens in Längsrichtung desselben beträchtlich erhöhen. Es hat sich erwiesen daß sich durch die Faserlagen gemäß der Erfindung, bei denen die Faserorientierung nicht unbedingt parallel zur Bolzenlängsachse sein muß, also dieser gegenüber auch geneigt sein kann, die dynamische Belastbarkeit der Schlaufe um das 1000-fache steigern läßt.This object is achieved according to the characterizing part of the patent claim, namely by a fiber structure of the loop wrapping area, in which additional fiber layers prevent or at least hinder a contraction of the plastic matrix in the direction of the bolt extension and thus considerably increase the strength of the loop in the longitudinal direction of the bolt. It has been found that the fiber layers according to the invention, in which the fiber orientation does not necessarily have to be parallel to the longitudinal axis of the bolt, that is to say it can also be inclined relative to it, can increase the dynamic loading capacity of the loop by a factor of 1000.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels weiter erläutert, wozu die Zeichnung perspektivisch nur Abschnitte zweier Bolzen 1 zeigt, die von einer geschlossenen Schlaufe 2 umschlungen sind. Dabei ist für die hauptsächlich auf Zug belastete Schlaufe 2 ein Grundaufbau gewählt aus in Schlaufenumfangsrichtung sich erstreckenden unidirektionalen Glas- o. dgl. Faserrovings bzw. Fasersträngen in einer Kunstharz o. dgl. Matrix. ' Da diese Schlaufe 2 zugleich im jeweiligen Bolzenumschlingungsbereich hohen radialen Pressungen ausgesetzt ist, sind hier im Verbund mit der Kunstharzmatrix zusätzliche Faserdeck-und Fasereinlagen 3 bzw. 4 vorgesehen mit einer Faserorientierung jeweils in Bolzenerstreckungsrichtung, wodurch sie in dieser Richtung der Schlaufe einer Kontraktion der Kunstharzmatrix Widerstand leisten. Dazu können die Faserdeck- und Fasereinlagen 3 bzw. 4 aus Fasergewebe -gelege o. dgl. bestehen beispielsweise mit einer 0/90°-Faserorientierung, wobei dann zwangsläufig nur Fasern einer Richtung den vorgenannten Zweck erfüllen. U.U. kann ebenso eine -45°-Faserorientierung in bezug auf die Bolzenlängsachse gewählt werden. Auch die Verwendung von isotropem Fasermaterial ist nicht ausgeschlossen.The invention is explained in more detail below with the aid of an exemplary embodiment, for which the drawing shows in perspective only sections of two bolts 1 which are wrapped in a closed loop 2. For the loop 2, which is mainly subjected to tension, a basic structure is selected from unidirectional glass or the like fiber rovings or fiber strands in a synthetic resin or the like, which extend in the loop circumferential direction. Since this loop 2 is at the same time exposed to high radial pressures in the respective pin wrapping area, additional fiber cover and fiber inserts 3 and 4 are provided here in connection with the synthetic resin matrix, with a fiber orientation in each case in the direction of the pin extension, thereby causing a contraction of the synthetic resin matrix in this direction of the loop To offer resistance. For this purpose, the fiber cover and fiber inlays 3 and 4 can consist of a woven fabric or the like, for example with a 0/90 ° fiber orientation, in which case only fibers in one direction inevitably fulfill the aforementioned purpose. U.U. a -45 ° fiber orientation can also be selected with respect to the longitudinal axis of the bolt. The use of isotropic fiber material is also not excluded.

Claims (1)

  1. A connection consisting of a bolt (1) and looping around it a loop (2), made of unidirectional fibre strands in a plastics matrix, characterised in that in the bolt-looping region the loop (2) is provided with fibre cover layers and/or fibre inserts (3) or (4) respectively bound by the plastics matrix in each case with at least a principal fibre orientation approximately in the direction of extent of the bolt.
EP84107953A 1983-10-25 1984-07-06 Combination of bolt and loop Expired EP0143163B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3338654 1983-10-25
DE3338654A DE3338654C1 (en) 1983-10-25 1983-10-25 Connection from a bolt and a loop

Publications (2)

Publication Number Publication Date
EP0143163A1 EP0143163A1 (en) 1985-06-05
EP0143163B1 true EP0143163B1 (en) 1986-11-26

Family

ID=6212649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84107953A Expired EP0143163B1 (en) 1983-10-25 1984-07-06 Combination of bolt and loop

Country Status (4)

Country Link
US (1) US4715589A (en)
EP (1) EP0143163B1 (en)
JP (1) JPS60121307A (en)
DE (2) DE3338654C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220581A1 (en) 2015-10-21 2017-04-27 Technische Universität Berlin Tensile element made of fiber-reinforced plastic

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4991827A (en) * 1986-11-10 1991-02-12 Tayco Developments, Inc. Springs formed of rope pressure-saturated or impregnated with binder
US5201498A (en) * 1992-01-21 1993-04-13 Akins Edward A Flexible fencing system
US5826304A (en) * 1993-08-06 1998-10-27 Carlson; J. Martin Composite flexure unit
US6205873B1 (en) * 1997-09-12 2001-03-27 Unisys Corporation Transmit motion via flexures
FR2780016B1 (en) * 1998-06-18 2000-08-04 Alsthom Gec RAIL VEHICLE BOGIE AND METHOD FOR MANUFACTURING A SIDING OF SUCH BOGIE
US20050044984A1 (en) * 2003-08-27 2005-03-03 Jones Brian H. Reinforced tension and compression reacting strut and method of making same
DE102010040495A1 (en) * 2010-09-09 2012-03-15 Siemens Aktiengesellschaft Device for transmitting a force, in particular a carrying loop
DE102011013050A1 (en) * 2011-03-04 2012-09-06 SGF SüDDEUTSCHE GELENKSCHEIBENFABRIK GMBH & CO. KG Thread stiffened axial coupling
EP2626298B1 (en) * 2012-02-09 2014-06-25 AGUSTAWESTLAND S.p.A. Aircraft rotor blade and relative forming method
DE102012110956A1 (en) * 2012-11-14 2014-05-28 Leichtbau-Zentrum Sachsen Gmbh feather

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BE377734A (en) * 1930-06-03
GB755633A (en) * 1954-01-13 1956-08-22 William Cooke & Company Ltd Improvements in or relating to slings
US3228481A (en) * 1964-04-24 1966-01-11 Bendix Corp Tie bar bushing
US3279278A (en) * 1964-04-24 1966-10-18 Bendix Corp Tension-torsion tie-bar and end fittings therefor
DE1900962A1 (en) * 1968-01-10 1969-07-31 Goeteborgs Bandvaeveri Aktiebo Sling on lifting equipment
US4038885A (en) * 1974-11-26 1977-08-02 Messerschmitt-Bolkow-Blohm Gmbh Connecting element for a part of fiber-reinforced plastic
US4200325A (en) * 1975-11-05 1980-04-29 Buffalo Weaving And Belting Co. Synthetic organic polymeric plastic sling protected by vulcanized or cured elastomeric laminate at load contacting area thereof
US4046411A (en) * 1976-12-01 1977-09-06 General Motors Corporation Impact energy absorbing mounting unit for mounting an automotive vehicle bumper assembly
JPS5471253A (en) * 1977-11-16 1979-06-07 Mitsubishi Rayon Co Ltd Cone rod
DE2826656C3 (en) * 1978-06-19 1986-01-09 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Connection element for a wing made of fiber-reinforced plastic
US4293276A (en) * 1978-10-27 1981-10-06 Textron Inc. Laminated composite rotor yoke
GB2048809B (en) * 1979-04-25 1983-03-30 Messerschmitt Boelkow Blohm Helicopter rotor head
US4300410A (en) * 1980-01-04 1981-11-17 Ford Motor Company Tension-compression member
DE3022418C2 (en) * 1980-06-14 1986-10-23 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Frame-shaped spring body
JPS5797912A (en) * 1980-12-10 1982-06-17 Toyota Motor Corp Connecting rod of fiber-reinforced metal for internal combustion engine
DE3119856C2 (en) * 1981-05-19 1986-08-28 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Spiral spring made of fiber composite material
FR2529860B1 (en) * 1982-07-08 1987-01-02 Aerospatiale HUB PLATE, MANUFACTURING METHOD AND ROTOR HUB OF A GIRAVION EQUIPPED WITH SUCH PLATES
US4466774A (en) * 1982-08-30 1984-08-21 United Technologies Corporation Composite flexbeam joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015220581A1 (en) 2015-10-21 2017-04-27 Technische Universität Berlin Tensile element made of fiber-reinforced plastic
EP3162546A1 (en) 2015-10-21 2017-05-03 Technische Universität Berlin Traction element made from fibre-reinforced plastic
US11396138B2 (en) 2015-10-21 2022-07-26 Technische Universitat Berlin Traction element made of fiber reinforced plastic

Also Published As

Publication number Publication date
EP0143163A1 (en) 1985-06-05
US4715589A (en) 1987-12-29
JPS60121307A (en) 1985-06-28
DE3461453D1 (en) 1987-01-15
DE3338654C1 (en) 1985-05-30

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