EP1534977A2 - Dispositif pour serrer des composants en composite contenant des fibres - Google Patents

Dispositif pour serrer des composants en composite contenant des fibres

Info

Publication number
EP1534977A2
EP1534977A2 EP03747974A EP03747974A EP1534977A2 EP 1534977 A2 EP1534977 A2 EP 1534977A2 EP 03747974 A EP03747974 A EP 03747974A EP 03747974 A EP03747974 A EP 03747974A EP 1534977 A2 EP1534977 A2 EP 1534977A2
Authority
EP
European Patent Office
Prior art keywords
clamping
fiber composite
composite component
section
clamping element
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.)
Withdrawn
Application number
EP03747974A
Other languages
German (de)
English (en)
Inventor
Alexander Horoschenkoff
Stefan Emmerling
Horst Bansemir
Walter Oefner
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.)
Alstom Transportation Germany GmbH
Original Assignee
Bombardier Transportation GmbH
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 Bombardier Transportation GmbH filed Critical Bombardier Transportation GmbH
Publication of EP1534977A2 publication Critical patent/EP1534977A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
    • F16F1/368—Leaf springs
    • F16F1/3683—Attachments or mountings therefor
    • F16F1/3686—End mountings

Definitions

  • the present invention relates to a device for clamping at least one elongated fiber composite component, in particular a spring and / or guide element made of fiber composite material, with a first tensioning element and a second tensioning element which can be connected via fastening means, which in the assembled state has a receiving area for the clamping reception of a clamping area of the fiber composite component form.
  • the wheel bearing is connected directly and inelastically to the associated ends of the spiral springs. This leads to the above-mentioned problems of reducing the pretensioning force in the clamped area through creep and relaxation processes.
  • DE 42 07 405 C2 discloses an axle guide for bogies of rail vehicles, the axles of which are guided longitudinally and transversely elastically by spring leaf axle links, which have a spring leaf-like shape, consist of a base body made of fiber composite material and have large areas on both ends of the vehicle or bogie frame and are clamped on the axle bearing housing.
  • spring leaf axle links which have a spring leaf-like shape, consist of a base body made of fiber composite material and have large areas on both ends of the vehicle or bogie frame and are clamped on the axle bearing housing.
  • short cross-sectional areas of the base body are of reduced thickness on both sides near the clamping areas in relation to the cross-section of the central area, so that an effect comparable to a film hinge is achieved.
  • DE 29 52 182 AI, DE 36 12 797 Cl, DE 39 30 873 Cl and DE 39 30 875 Cl each relate to bogies for rail vehicles, with a large clamping area here as well Storage of the bogie frame manufactured in FRP construction is provided.
  • DE 39 35 795 AI discloses a leaf spring made of fiber composite material with a substantially uniform elongated spring body and fastening devices at the ends of the spring body and between these ends, the fastening devices having at least one metallic force introduction element which, including an intermediate layer, on opposite surfaces of the spring body is arranged.
  • the intermediate layer is made of a castable plastic and connects the force introduction element and the spring body to one another in a form-fitting and material-locking manner during their formation.
  • DE 39 20 926 AI describes a leaf spring made of fiber composite material with a spring eye body on at least one spring end and a clamping element which wraps around the spring eye body and has end sections which abut the corresponding surfaces of the spring end and are held there by fastening means.
  • the abutting surfaces of one or both end sections of the clamping element and the spring end are overall not planar and at least approximately complementary to one another.
  • DE 38 41 846 AI describes a connection of the axle or pivot bearing in the case of double-axle units with leaf springs which are fixed on the frame and made of fiber composite material in commercial vehicles.
  • a housing which is divided in at least one plane, is provided for the non-positive reception of the spring.
  • At least two rubber or elastomer metal elements are arranged between the inner housing wall and the spring.
  • DE 34 15 125 AI discloses a leaf spring made of fiber composite material, which is positively connected to an axis in the area of the central fastening, wherein essentially the entire contact surface between the spring position and the axis is designed as a positive connection.
  • the side of the spring position facing the axis has a plurality of transverse ribs which engage in corresponding transverse grooves in the bearing surface of the axis.
  • a disadvantage of all clamped, more or less complex holders of the component made of fiber composite material is that the pretensioning force in the clamped area is reduced by creep and relaxation processes. This may considerably reduce the strength of the connection.
  • the object of the invention is to eliminate the disadvantages of the prior art described and, in particular, to propose a device for clamping spring and / or guide elements in fiber composite construction, which, with reliable clamping, enables improved force and torque transmission.
  • This object is achieved on the basis of a device according to the preamble of claim 1 by the features specified in the characterizing part of claim 1.
  • the invention is based on the technical teaching that a particularly reliable and defined introduction of force and torque into the fiber composite component is achieved if the first clamping element has at least one first clamping section and the second clamping element at least one associated with the first clamping section for clamping the fiber composite component in the assembled state has second clamping section, wherein the first and second clamping element are designed such that the fiber composite component is clamped in the assembled state with a predetermined clamping force between the first and second clamping section.
  • the pretensioning force exerted on the fiber composite component is comparatively low, so that no significant creeping or relaxation processes occur in the unloaded state of the fiber composite component.
  • the pretensioning force then only has to be so great that the cohesion of the arrangement is ensured in the unloaded state.
  • the fixation can then be ensured by the forces resulting from the load in the area of the clamping elements.
  • first and a second clamping element can be assigned to one another accordingly.
  • first clamping element has at least one third clamping section and the second clamping element has at least one fourth clamping section assigned to the third clamping section for clamping the fiber composite component in the assembled state.
  • the first and second tensioning elements are then designed such that the fiber composite component is clamped between the third and fourth clamping sections in the assembled state with a predetermined clamping force in each case.
  • the first tensioning element has at least one first stop and the second tensioning element has at least one second stop, which cooperate with one another in the assembled state such that the fiber composite component in the assembled state with a predetermined first clamping force between the first and second clamping section and / or with a predetermined second clamping force between the third and fourth clamping section.
  • the stops advantageously ensure that a defined, adjustable pretensioning force also acts between the tensioning elements, which ensures their permanent connection. Perform creep or relaxation processes in the area of the fiber composite component not to significantly influence the pretension between the clamping elements.
  • the stops in the assembled state preferably predefine a defined first distance between the first and second clamping sections. Additionally or alternatively, a defined second distance between the third and fourth clamping sections is then specified.
  • the tensioning elements can in principle be of any design. Particularly simple variants of the invention are characterized in that at least one of the clamping elements is U-shaped with a first and second leg, a stop for the other clamping element being formed in the region of the leg ends.
  • the clamping sections can in principle also be designed in any suitable manner.
  • at least one clamping section is designed on the tensioning element in the manner of a projection.
  • the clamping section can be formed, for example, bump-like.
  • At least one has Clamping section has a wear protection provided for interaction with the fiber composite component.
  • This can in particular be a wear protection layer.
  • At least one clamping section is formed by a clamping element releasably connected to the clamping element.
  • the clamping element preferably comprises a metal-plastic composite, in particular a metal-rubber composite. More preferably, the tensioning element has a recess for receiving the clamping element in order to keep it defined in a simple manner.
  • At least one shear bushing is provided as a positive connection for absorbing transverse and / or longitudinal forces acting on the fiber composite component, which in the assembled state has a first recess in the first clamping element and a second recess in the second clamping element sitting. It extends through a third recess in the fiber composite component.
  • the two clamping elements can in principle be connected to one another in any manner.
  • at least one fastening means in particular a clamping screw, is provided for passing through the shear bushing.
  • an anti-lift device can also be provided, which prevents the two clamping elements from unintentionally coming apart.
  • a particularly compact clamping is achieved when the shear bushing is arranged in the region of a clamping section in the assembled state.
  • the present invention further relates to a fiber composite component with a clamping area for cooperation with a device according to the invention for clamping.
  • a device according to the invention for clamping it is provided that at least one first part of the clamping area located in the area of the form-fitting connection is designed in the manner of a cross connection.
  • the cross connection advantageously enables the introduction of higher forces and moments in this area.
  • such a cross bond is characterized by a lower notch sensitivity.
  • the fiber composite component comprises at least one unidirectional fiber layer in a partial section.
  • the subsection preferably extends at least over a second part of the clamping area adjacent to the first part of the clamping area.
  • a preferred variant of the fiber composite component according to the invention has in the highly resilient first Part of the clamping area on a third recess, in particular a third recess for receiving a shear bush. This ensures that particularly high forces can be introduced into the fiber composite component.
  • the fiber composite component according to the invention can in principle comprise one or more materials usually used for such fiber composite components. It preferably comprises glass fibers, carbon fibers, Kevlar fibers, boron fibers, synthetic fibers or any combination of these fibers. Suitable thermosetting or thermoplastic resins are preferably used as the matrix material. Vinyl ester resins (VE) or epoxy resins (EP) are preferably used.
  • the fiber composite component according to the invention can be designed for any application. It can be used particularly advantageously in vehicle construction. This is preferably used as a spring, in particular a leaf spring, or as part of a carrier or handlebar of the vehicle.
  • the vehicle can in particular be a rail vehicle.
  • the present invention further relates to an arrangement with a device according to the invention and a fiber composite component according to the invention held by the device, since this complements the advantages of these two components described above.
  • a particularly favorable configuration with distributed force introduction results in preferred variants of the arrangement according to the invention in which the fiber composite component has a third recess for receiving the shear forces. has bushing and the shear bush abuts at least one of the walls of the first, second or third recess with an interference fit. This results in a certain fixation of the components to one another, which makes it possible to loosen the clamping without the individual components immediately falling apart. This is particularly advantageous in the case of the variants described above with interchangeable clamping elements.
  • Figure 1 is a sectional view through a preferred embodiment of an arrangement according to the invention from a device according to the invention and a fiber composite component according to the invention along the line I-I in Figure 2;
  • FIG. 2 shows a sectional view through the embodiment from FIG. 1 along line II-II in FIG. 1;
  • Figure 3 is a plan view of the embodiment of Figure 1 in the direction III in Figure 1;
  • Figure 4 is a sectional view through the embodiment of Figure 1 along line IV-IV in Figure 1;
  • FIG. 5 shows a sectional view through a further preferred exemplary embodiment of an arrangement according to the invention with an anti-lift device
  • Figure 6 is a plan view of a further preferred embodiment of a fiber composite component according to the invention.
  • Figures 1 to 4 show sectional views through a preferred embodiment of an arrangement according to the invention from a device according to the invention for clamping a fiber composite component according to the invention in the form of a leaf spring 1 for a chassis of a rail vehicle.
  • the leaf spring 1 is mounted or clamped between four flat bumps formed in the manner of a projection, the first clamping section 2, the second clamping section 3, the third clamping section 4, and the fourth clamping section 5 form.
  • the first clamping section 2 and the second clamping section 3 are arranged one above the other, just like the third clamping section 4 and the fourth clamping section 5.
  • the first and third clamping sections 2 and 4 are arranged on a first clamping element 6, while the second and fourth clamping sections 3 and 5 are arranged on a second clamping element 7.
  • the clamping sections 2, 3, 4 and 5 designed in the manner of a projection on the respective clamping element are each releasably connected to the respective clamping element 6 or 7, respectively, clamping elements 2.1, 3.1,
  • the clamping elements 2.1 and 4.1 are each detachable in an associated recess 6.1 or
  • clamping sections in other variants of the invention can also be formed in one piece with the respective clamping element.
  • the first clamping element 6 forming the upper part of the clamping and the second clamping element 7 forming the lower part of the clamping are U-shaped with the legs 8.1 and 8.2 or 9.1 and 9.2.
  • first and second stops in the form of stop faces are provided, in the area of which the legs 8.1 and 9.1 as well as 8.2 and 9.2 touch in the assembled state.
  • a wear protection layer 10 is arranged, which, thanks to the design with the releasable clamping elements 2.1, 3.1, 4.1 and 5.1, is designed in such a way that it can be changed without dismantling the clamping, as described in more detail below.
  • the wear protection layer 10 is an abrasion-resistant, tough-elastic material, such as a filled elastomer, the thickness of which is approximately 2 mm.
  • the wear protection layer 10 is arranged up to the metal body of the respective clamping element 2.1, 3.1, 4.1 or 5.1.
  • the respective clamping element is therefore a metal Plastic composite formed, which ensures sufficient shape stability and easy interchangeability.
  • the leaf spring 1 consists of two individual springs 1.3 and 1.4 with directional fiber layers.
  • a connection in the form of a cross connection in the form of a bridge 1.5 between the individual springs 1.3 and 1.4 is provided over a first part of the respective clamping area 1.1 or 1.2.
  • area of the bridge 1.5 shear bushes 11 are arranged, via which a positive connection is realized for absorbing transverse and longitudinal forces.
  • the respective shear bushing 11 extends through a first recess 6.3 of the first clamping element 6, a second recess 7.3 of the second clamping element 7 and a third recess 1.6 of the leaf spring.
  • connection between the first clamping element 6 and the second clamping element 7 takes place via screws 12, one screw 12 each extending through a shear bushing 11.
  • the height of the legs 8.1, 8.2, 9.1 and 9.2 is a defined distance between the first and second clamping sections 2 and 3 and the second and third Clamping section 4 and 5 specified. In the assembled state, this ensures that a defined biasing force acts on the leaf spring 1. Furthermore, the stops ensure that a defined, strength-determining pretensioning force also acts essentially independently of this through the screw connections 12 between the two clamping elements 6 and 7 consisting of metal. Due to the tensioning of the two tensioning elements 6 and 7, only a comparatively low pretensioning force acts on the leaf spring 1. The prestressing force of the screw connections is therefore not exposed to any significant time-dependent creep or relaxation processes.
  • the clamping element 2.1 has an opening 13, through which the shear bushing 11 extends, which press-fits the first, second and third recesses 6.3, 7.3 and 1.6.
  • the clamping element 2.1 is to be replaced to loosen the screws 12 and to remove the tensioning elements 6 and 7 so far from each other that the clamping element 2.1 can be removed from the associated recess 6.1 in the direction of the arrow 14.
  • the press pairings between the shear bushing 11 and the adjacent parts must be advantageous not be solved, which makes the exchange particularly easy and convenient.
  • the other clamping elements are replaced in the same way.
  • FIG. 5 shows a partial sectional view through a further preferred exemplary embodiment of an arrangement according to the invention, the basic structure of which is the same as that of FIGS. 1 to 4, so that only the differences will be discussed.
  • the difference is that in this variant a lifting safety device 15 is provided, which prevents the tensioning elements 6 'and 7' from coming apart when the screw connections 12 'are loosened, and so the fiber composite component 1' is no longer held. !
  • FIG. 6 shows a plan view of a further preferred exemplary embodiment of a fiber composite component 1 ′ 1 .
  • This consists of a single spring 1.3 '' with unidirectional fiber layers. In the clamping area are laterally adjacent to the single spring 1.3 '' two lugs 1.5 '' formed in the manner of a cross, in the area of which a third recess 1.6 '' is provided for receiving a shear bushing.
  • This fiber composite component 1 ′′ can be fastened analogously to the bracing described above, so that reference should only be made to the above explanations.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Moulding By Coating Moulds (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

L'invention concerne un dispositif pour serrer au moins un composant (1; 1'; 1'') en composite contenant des fibres, de forme allongée, en particulier un élément élastique et/ou de guidage en matériau composite comportant des fibres. Ce dispositif comprend un premier élément de serrage (6; 6') et un second élément de serrage (7; 7'), qui peut être assemblé avec le premier élément par l'intermédiaire de moyens de fixation (11, 12), ces éléments de serrage formant, à l'état monté, une zone de réception destinée à loger et serrer une zone de serrage (1.1, 1.2) dudit composant (1; 1'; 1''). Le premier élément de serrage (6; 6') présente au moins une première partie de serrage (2), et le second élément de serrage (7; 7') présente au moins une seconde partie de serrage (3), associée à la première partie de serrage (2) pour serrer le composant (1; 1'; 1'') en composite comportant des fibres à l'état monté. Le premier et le second élément de serrage (6, 7; 6', 7') sont conçus de sorte que ledit composant (1; 1'; 1'') est, à l'état monté, serré avec une force de serrage prédéterminée, entre la première et la seconde partie de serrage (2, 3).
EP03747974A 2002-09-05 2003-09-05 Dispositif pour serrer des composants en composite contenant des fibres Withdrawn EP1534977A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10241009 2002-09-05
DE2002141009 DE10241009A1 (de) 2002-09-05 2002-09-05 Vorrichtung zum Einspannen von Faserverbundbauelementen
PCT/EP2003/009890 WO2004023000A2 (fr) 2002-09-05 2003-09-05 Dispositif pour serrer des composants en composite contenant des fibres

Publications (1)

Publication Number Publication Date
EP1534977A2 true EP1534977A2 (fr) 2005-06-01

Family

ID=31895658

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03747974A Withdrawn EP1534977A2 (fr) 2002-09-05 2003-09-05 Dispositif pour serrer des composants en composite contenant des fibres

Country Status (5)

Country Link
EP (1) EP1534977A2 (fr)
JP (1) JP2005538317A (fr)
AU (1) AU2003267052A1 (fr)
DE (1) DE10241009A1 (fr)
WO (1) WO2004023000A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017215403B4 (de) 2017-09-04 2022-05-19 Ford Global Technologies, Llc Federbaugruppe

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DE3613804C1 (de) * 1986-04-24 1987-07-09 Audi Ag Vorrichtung mit einem flaechigem Bauteil aus faserverstaerktem Kunststoff und einem endseitigen Krafteinleitungsteil
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DE3930873C1 (fr) * 1989-09-15 1991-01-24 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
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JPH05312228A (ja) * 1992-05-13 1993-11-22 Mitsubishi Motors Corp リーフスプリング締着用クリップ
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Also Published As

Publication number Publication date
WO2004023000A2 (fr) 2004-03-18
JP2005538317A (ja) 2005-12-15
DE10241009A1 (de) 2004-03-25
AU2003267052A1 (en) 2004-03-29
WO2004023000A3 (fr) 2004-06-03

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