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EP4436807A1 - Bielle d'accouplement et son procédé de production - Google Patents

Bielle d'accouplement et son procédé de production

Info

Publication number
EP4436807A1
EP4436807A1 EP22822044.8A EP22822044A EP4436807A1 EP 4436807 A1 EP4436807 A1 EP 4436807A1 EP 22822044 A EP22822044 A EP 22822044A EP 4436807 A1 EP4436807 A1 EP 4436807A1
Authority
EP
European Patent Office
Prior art keywords
section
coupling rod
connecting element
joint
rod according
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.)
Pending
Application number
EP22822044.8A
Other languages
German (de)
English (en)
Inventor
Arne BUSCH
Eduardo GONZÁLEZ PÉREZ
Christian Friedrich
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.)
Muhr und Bender KG
Original Assignee
Muhr und Bender 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 Muhr und Bender KG filed Critical Muhr und Bender KG
Publication of EP4436807A1 publication Critical patent/EP4436807A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/001—Suspension arms, e.g. constructional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14467—Joining articles or parts of a single article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/20—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in a single direction, e.g. roofing or other parallel fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/40—Shaping or impregnating by compression not applied
    • B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
    • B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/545—Perforating, cutting or machining during or after moulding
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0619—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints the female part comprising a blind socket receiving the male part
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C11/00—Pivots; Pivotal connections
    • F16C11/04—Pivotal connections
    • F16C11/06—Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints
    • F16C11/0666—Sealing means between the socket and the inner member shaft
    • F16C11/0671—Sealing means between the socket and the inner member shaft allowing operative relative movement of joint parts due to flexing of the sealing means
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/026—Constructions of connecting-rods with constant length made of fibre reinforced resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/84—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined
    • B29C70/845—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks by moulding material on preformed parts to be joined by moulding material on a relative small portion of the preformed parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0046—Elastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/007—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0077—Yield strength; Tensile strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0094—Geometrical properties
    • B29K2995/0097—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/416—Ball or spherical joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/012—Hollow or tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/10—Constructional features of arms
    • B60G2206/11—Constructional features of arms the arm being a radius or track or torque or steering rod or stabiliser end link
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7101—Fiber-reinforced plastics [FRP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8101—Shaping by casting
    • B60G2206/81012—Shaping by casting by injection moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8105—Shaping by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/8106—Shaping by thermal treatment, e.g. curing hardening, vulcanisation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/81—Shaping
    • B60G2206/811—Shaping by cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8209—Joining by deformation
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

Definitions

  • the present invention relates to a coupling rod for a chassis of a motor vehicle and a method for producing such a coupling rod.
  • a connecting rod is used to connect the stabilizer bar to the chassis of a vehicle.
  • the up and down movements of a wheel occurring while driving are passed on to the stabilizer via the coupling rods.
  • the stabilizer bar is loaded.
  • cornering the rolling of the vehicle is reduced and driving stability is increased.
  • Coupling rods can have ball joints at their ends, via which they are connected to the chassis or stabilizer. Coupling rods are also known as pendulum supports, stabilizer bars, torsion bars or axle struts.
  • a coupling rod is known from the generic FR 2 862 559 A1, the connecting rod of which is made of fiber-reinforced plastic by pultrusion.
  • the ends are molded onto the connecting rod with the joints.
  • the profile that forms the bar can be made of a thermoplastic or thermoset rigid polymeric material or aluminum.
  • the connecting rod has a uniform cross-section along its length.
  • a stabilizer for a motor vehicle suspension is known from EP 3385097 A1.
  • the stabilizer bar comprises a tubular body having at each of its ends two flattened areas between which a sealed cavity is formed, and a sheathing body made of polymeric material, which is connected to the respective end of the tubular body in the molding process so that it surrounds the flattened areas.
  • the end casing bodies each have an articulated connection.
  • the tubular body is preferably made of metal, but can also be made of a thermoplastic material.
  • An axle strut for a vehicle is known from DE 10 2017 207 164 A1, corresponding to WO 2018/197136 A1, which has a support profile and two load introduction elements connected thereto by gluing.
  • the supporting profile is continuous fiber reinforced and is formed from fiber reinforced plastic and is produced continuously by means of a pultrusion process or by means of a pulwinding process.
  • DE 10 2018 213 322 A1 discloses a multipoint link for a chassis of a motor vehicle which has a pultruded hollow profile section made from a fiber-reinforced plastic.
  • a method for producing a ball joint for a coupling rod is known from DE 10 2005 034 210 A1.
  • EP 3 283 279 B1 discloses a pultrusion device for producing a fiber-reinforced endless profile with a cross-section that is discontinuous in the pultrusion direction, and a method for its production.
  • DE 10 2019 218 124 B3 discloses a method for positively connecting a hollow body made of fiber-reinforced plastic to a metal body.
  • the hollow body is introduced into a die casting mold, into which molten metal is then introduced under pressure.
  • the pressure of the molten metal is greater than the pressure in the interior of the hollow body, so that its wall in a connecting section is dented in some areas due to the pressure difference, forming a depression.
  • Molten metal penetrates into the recess, which then solidifies and forms the metal body in the solidified state.
  • DE 102010041 791 A1 discloses a stabilizer bar with a joint mount which has an end region with a recess into which a connecting element engages in a form-fitting manner.
  • the starting material of the connecting element can consist of metal and/or fiber-reinforced plastic.
  • a connecting strut is known from DE 10 2013 007 284 A1, with a rod section and end bearing eyes.
  • the connecting strut consists at least partially of fiber-reinforced plastic, which is formed by prepregs.
  • DE 10 2014 220 796 A1 discloses an articulated rod for a motor vehicle, with a connecting rod designed as an open profile and two joints connected to one another via this connecting rod.
  • the joints each comprise a joint housing in which the connecting rod is embedded with its axial ends.
  • a link rod for vehicles is known from EP 1 953 012 A2, with a strut body, at each end of which a joint is connected.
  • the strut body is formed from an open profile and the pivot comprises a ball stud articulated in a thin-walled sliding cup.
  • the end of the strut body and the sliding shell are overmoulded together with a plastic coating.
  • EP 1 733 859 A1 discloses a method and a device for producing a connection and force transmission element for suspension and steering mechanisms of motor vehicles by means of overmolding.
  • the connecting element has a rod-shaped middle part made of a material of high mechanical strength and an end part made of plastics material which is over-molded on one end of the middle part, so that a one-piece connecting element is formed.
  • the present invention is based on the object of proposing a coupling rod for a chassis of a motor vehicle which is easy to produce and has a low weight.
  • the task is also to propose a corresponding method with which such a coupling rod can be produced easily and efficiently.
  • a coupling rod for a chassis of a motor vehicle comprising: a connecting element which is produced from a fiber-reinforced plastic by means of a pultrusion process, the fiber-reinforced plastic comprising continuous fibers embedded in a matrix, which extend in a longitudinal direction of the connecting element extend, wherein the connecting element has a strut section with a longitudinal axis and, at least at one end, a connecting section which is deformed in relation to the strut section; a hinge element; and a carrier element which is connected to the connecting element and the joint element and is produced from plastic by overmoulding, with a form-fitting connection being formed between the connecting section of the connecting element and the carrier element.
  • the coupling rod has a low weight due to the use of fiber-reinforced plastic and can be easily produced using the pultrusion process.
  • the formed connection section which deviates from a continuous long form with a constant cross section, can be produced by means of the pultrusion process.
  • a secure connection to the injection-molded carrier element or the articulated element accommodated therein can be established by the formed connection section.
  • the coupling rod has a connecting section that is shaped in relation to the strut section, which includes the possibility that both ends can also have a shaped connecting section.
  • the joint element can be positioned with its joint axis as required and thus connected to the rod element.
  • the injection-molded carrier element serves to connect the joint element to the rod element and to accommodate the joint element; in this respect, the carrier element can also be referred to as a joint mount. If two joint elements are used, they can be positioned at any desired angle to one another, ie between 0° and 180° in relation to the longitudinal axis of the coupling rod.
  • the joint element has a bearing part accommodated in the carrier element and a connecting part that can be connected to a chassis part.
  • the design of the joint element is arbitrary and can be selected depending on the requirement.
  • the coupling rod can have at least one joint element made of a metallic material, with a ball section as the bearing part and a pin section as the connection part.
  • the joint element can be designed with or without a ball socket or be embedded in the plastic joint mount.
  • the coupling rod can have at least one joint element made of an elastic material.
  • the elastic joint element can have an elastic bearing part and a rigid sleeve connected thereto as a connecting part.
  • the elastic bearing part can be made of rubber, for example, and can be connected to the carrier element by overmolding or pressing.
  • the sleeve is preferably made of metal, for example aluminum or steel, and can be inserted into the bearing part. Alternatively, the bearing part can be vulcanized onto the sleeve.
  • the formed connecting section has a smallest transverse extent in cross section that is less than 0.5 times, in particular less than 0.75 times, the smallest diameter of the strut section.
  • a forming area is designed in particular in such a way that a form-fitting connection is produced in the axial direction and against twisting in relation to the molded-on carrier element.
  • a cross-sectional area of the formed connecting section can deviate from a cross-sectional area of the strut section by less than 25%, in particular less than 10%. This achieves a homogeneous structure of the endless fibers over the entire length of the connecting element, which leads to high resilience and a long service life.
  • the connecting element is designed as a hollow profile, at least in the strut section, with an embodiment as a solid profile also being possible.
  • the wall thickness is preferably greater than 2 mm and/or less than 4 mm.
  • a connecting section can be produced by radially pressing in the hollow profile so that a constriction is produced. The pressing can be done in such a way that the hollow profile is closed in this section, in particular in that in cross-section two opposing Wall sections are connected to each other. Closing the hollow profile in the connecting section prevents plastic from undesirably penetrating into the cavity of the connecting element when the joint element is molded on.
  • the matrix of the fiber-reinforced plastic can be a thermoset or a thermoplastic.
  • Thermosets are densely crosslinked polymeric materials, whereby the material is solid after crosslinking.
  • a thermoset can also be referred to as a hardened synthetic resin.
  • Thermosets are usually formed as non-crosslinked pre-condensates from the dissolved, liquid or plastic state and then hardened. Crosslinking can take place simultaneously or after shaping.
  • Thermosetting plastics from the group of vinyl ester resins, epoxy resins or unsaturated polyester resins or combinations thereof are preferably used for the matrix of the connecting element.
  • the duroplastics used can be chosen so that they preferably cure at room temperature, ie without the addition of heat. Furthermore, the duroplastics can in particular cure quickly, ie achieve dimensional stability in less than 10 seconds during curing.
  • the plastic encapsulation is preferably made from a thermoplastic.
  • the endless fibers can comprise glass fibers (GF) and/or carbon fibers (CF) and/or aramid fibers (AF) and/or natural fibers or combinations of the fibers mentioned.
  • the endless fibers are arranged unidirectionally or quasi-isotropically along the connecting element or at least along the strut section. They can extend the entire length from one end to the other end of the connecting element.
  • the connecting element In the strut section, the connecting element can have a fiber volume proportion of between 50% and 70% of the total volume. In the connection section adjoining the strut section, the proportion of matrix can be somewhat reduced, so that the proportion of fiber volume can be between 50% and 80% here, for example.
  • the properties of the fiber-reinforced plastics can be adjusted as required using the compounds and crosslinking substances that can be used for the duroplastics, as well as the fiber reinforcement materials (GF, CR, AF).
  • the fiber-reinforced plastic, in particular with a duroplastic matrix is preferably designed in such a way that the connecting element has a transverse tensile strength of at least 40 MPa, in particular at least 50 MPa.
  • the effective modulus of elasticity of a fiber-reinforced plastic is defined in particular by the modulus of elasticity of the fibers, the modulus of elasticity of the matrix and the fiber volume fraction.
  • the fiber-reinforced plastic made of duroplastic material is preferably designed in such a way that the effective modulus of elasticity in the direction of the fibers is greater than 35 GPa, in particular greater than 40 GPa.
  • the connecting section can be designed in such a way that it ends in front of the joint head.
  • the formed connection section preferably has at least one cross-section-reducing indentation, which forms the form-fitting connection with the injection-molded carrier element.
  • the end of the connecting section is preferably closed in order to prevent plastic from penetrating when the associated joint element is molded on.
  • the formed connecting section can be designed in such a way that it extends as far as the bearing part or articulated head in a side view.
  • the connecting section of the connecting element can encompass the bearing part or the spherical section of the joint head over an angular range of at least 90°, in particular at least 180° and/or up to 360° around the joint axis. In this way, a reinforcement of the connection area is guaranteed.
  • the joint element can have a spigot section which is firmly connected to the ball section, with a sealing bellows being provided which seals the spigot section with respect to the injection-molded carrier element.
  • the bellows is fixed in a sealing manner with a first collar on the journal section and with a second collar on the carrier element.
  • the object is further achieved by a method for producing a coupling rod, with the steps: producing an endless profile by means of pultrusion in a continuous process from endless fibers embedded in a plastic matrix, the endless profile being at least partially hardened, the endless profile having a higher ductility in second sections or formability is provided than in hardened first sections; Reshaping of the endless profile in the second sections, so that reshaped areas arise; hardening of the second sections after forming, so that the endless profile is fully hardened; cutting the fully hardened endless profile into a connecting element having a strut section and at least one deformed connecting section; providing a joint element with a bearing part and a connecting part; inserting and aligning the connecting element and the joint element in an injection molding tool, a mold cavity being formed around the connecting portion of the connecting element; and injecting plastic into the mold cavity, with a form-fitting connection being formed between the carrier element thus formed and the connecting section of the connecting element by curing the injected plastic.
  • the endless profile is hardened to such an extent that it is already dimensionally stable, but still so ductile that it can be deformed in some areas by an external force. After forming, the endless profile is then fully hardened, for example with or without the addition of heat.
  • a second option which applies in particular to a thermoplastic matrix
  • the endless profile is first completely hardened and then the second sections are made softer again by heating, so that they can be deformed. After the second partial sections have been formed, they are then cooled again and hardened as a result, so that the endless profile is completely hardened.
  • the connecting section of the connecting element can be subjected to a structuring surface treatment before the overmolding.
  • the surface treatment can be accomplished, for example, by mechanically introducing a micro-serration. This can be done in particular during the forming by means of a suitable shaping structure of the forming tool.
  • the surface processing can also be carried out by partially removing the upper plastic layer, for example by laser processing.
  • at least 50% of the surface to be overmoulded is given a corresponding structuring treatment, in particular at least 75%.
  • the structure produced can have a roughness of, for example, more than 100 micrometers and less than 1 mm.
  • the connection section can be provided with an adhesion promoter.
  • a material-fitting connection is also produced, which leads to a particularly reliable connection.
  • a bearing shell for the joint ball can optionally also be injected or overmolded as part of the overmolding.
  • FIG. 1A shows a coupling rod according to the invention in a first embodiment in a side view, partially sectioned
  • FIG. 1B shows a first end of the coupling rod from FIG. 1A as a detail in an enlarged view, without a seal;
  • FIG. 1C shows a second end of the coupling rod from FIG. 1A as a detail in an enlarged view in longitudinal section, without a seal;
  • FIG. 1D shows the connecting element of the coupling rod from FIG. 1A in a perspective view, partially in section;
  • FIG. 1E shows the end of the connecting element from FIG. 1D in an enlarged representation;
  • FIG. 2 shows the end of a coupling rod according to the invention in an embodiment that is slightly modified compared to the embodiment shown in FIG. 1;
  • FIG. 3A shows a coupling rod according to the invention in a further embodiment in a side view, partially sectioned
  • FIG. 3B shows the connecting element of the coupling rod from FIG. 3A in a perspective view, partially sectioned
  • FIG. 3C shows the end of the connecting element from FIG. 3B in an enlarged representation
  • FIG. 4 shows a coupling rod according to the invention in a further embodiment in longitudinal section, partially in an exploded view
  • FIG. 5 shows a coupling rod according to the invention in a further embodiment, partially in section.
  • FIGS. 1A to 1E which are also collectively referred to as FIG. 1 and are jointly described below, show a coupling rod 2 according to the invention in a first embodiment.
  • the coupling rod 2 can be used, for example, for a chassis of a motor vehicle in order to connect an axle stabilizer to the chassis.
  • the coupling rod 2 comprises a connecting element 3 made of a fiber-reinforced plastic, at the ends of which a joint element 4, 5 is fastened by means of an injection-molded carrier element 6, 7.
  • the connecting element 3 is produced from continuous fiber-reinforced plastic by means of a pultrusion process.
  • the connecting element comprises continuous fibers 22 embedded in a matrix 23, which extend over the length of the connecting element.
  • the profile of the connecting element 3 is produced in a continuous process through the targeted connection of fiber reinforcements and resin systems.
  • the connecting element 3 is designed as a hollow profile, without being restricted thereto, and comprises a strut section 8 and connecting sections 9, 9′ formed at the two ends.
  • the wall thickness of Hollow profile can be chosen according to the technical requirements and can be, for example, between 2 mm and 4 mm in the strut section.
  • the formed connecting sections 9, 9' are each produced by pressing in the hollow profile at a number of points that are spaced apart axially from one another. Viewed in longitudinal section, this creates a double-wavy profile with tapered areas 10, 11 and an enlarged area 12 in between.
  • the deformations can be produced in the course of the pultrusion process in a partially hardened state, i.e. before these deformed areas are fully hardened. With the sequence of the tapered or flattened areas 10, 11 and the expanded profile area 12 lying in between, a secure form-fitting connection to the carrier element 6, 7 is produced, both in the axial direction and against twisting.
  • the matrix 23 of the fiber-reinforced plastic can be a thermoset or a thermoplastic.
  • the endless fibers 22 can include glass fibers (GF) and/or carbon fibers (CF) and/or aramid fibers (AF) and/or natural fibers or combinations of the fibers mentioned.
  • the endless fibers are preferably arranged unidirectionally or quasi-isotropically along the connecting element 3 or the strut section 8 .
  • the proportion of fiber volume in the total volume of fibers 22 and matrix 23 is between 50% and 70%.
  • the matrix portion can be somewhat reduced due to the reshaping, so that a fiber volume portion of, for example, between 50% and 80% can result here.
  • the cross-sectional area S9 of the connecting section 9, 9' can essentially correspond to the cross-sectional area S8 of the strut section 8, with deviations of less than 25%, in particular less than 10%, being possible.
  • the connecting element 3 is preferably made from a matrix of duroplastic with continuous fibers 22 embedded therein in such a way that it has a transverse tensile strength of at least 40 MPa.
  • the effective modulus of elasticity of the connecting element 3 in the fiber direction is in particular greater than 35 GPa.
  • the connection section 9, 9' ends in front of the joint element 4, 5, the form-fitting connection between the components mentioned being formed by the overmoulded support element 6, 7.
  • the joint elements 4 , 5 are designed in the form of ball pins, which are each made of a metallic material and have a ball section as the bearing part 13 and a pin section as the connection part 14 .
  • a spherical shell 21 is injected into the respective carrier element 6, 7, in which the spherical section 13 is pivotally mounted.
  • the joint element 4, 5 is attached to the connecting element 3 by overmolding with plastic.
  • the overmoulded plastic forms the carrier element 6, 7 in the hardened state, which on the one hand is positively connected to the connecting element 3 and on the other hand forms a receptacle for an associated joint element.
  • a thermoplastic material is preferably used for the plastic encapsulation.
  • the respective joint element 4, 5 is positioned with its joint axis A4, A5 as required and is thus connected to the connecting element 3.
  • the two joint elements 4, 5 can be positioned at any angle to one another, with the two joint axes A4, A5 being able to enclose an angle of between 0° and 180° with one another, viewed in an axial view of the longitudinal axis of the coupling rod.
  • the joint space can be sealed off by means of a seal 15, 15'.
  • a seal 15, 15' At the first end in Figure 1A the seal 15 is shown in exploded view and at the second end the seal 15' is shown assembled.
  • the seal 15, 15' comprises a sealing bellows 16, 16', which is pulled with a first collar onto an annular groove 17 of the carrier element 6, 7 and is fixed in a sealing manner by means of a retaining ring 18, 18', and with a second collar in an annular groove 19 of the joint element 4, 5 engages and is sealingly fastened by means of a locking ring 20, 20'.
  • a method for producing a coupling rod 2 according to the invention can comprise the following steps: An endless profile is produced from endless fibers 22 embedded in a plastic matrix 23 by means of pultrusion in a continuous process.
  • the endless profile is hardened, with at least partial areas still being formable, or be made deformable again, which later form the connecting sections 9.
  • the connecting sections 9 are formed into the endless profile by forming.
  • the endless profile is fully hardened and then cut to length to form a connecting element 3 with a strut section 8 and a connecting section 9 .
  • the connecting element 3 and a prefabricated joint element 4, 5 are placed in an injection mold and aligned with one another in the desired position. Plastic is injected into the mold cavity formed in this way, which then hardens to form the carrier element 7 . In this way, a form-fitting connection is formed between the carrier element 7 and the connecting section 9 of the connecting element 3 .
  • FIG. 2 shows the end section of a coupling rod according to the invention in a modified embodiment in which no ball socket is provided in the support element 6, 7. Rather, the spherical section 13 is pivotally mounted directly in a spherical inner surface 24 of the carrier element 6 . Otherwise, the present embodiment according to FIG. 2 corresponds to that shown in FIG. 1, to the description of which reference is made for abbreviation.
  • FIGS. 3A to 3C also collectively referred to as FIG. 3, show a coupling rod according to the invention in a further embodiment. This largely corresponds to the embodiment shown in FIG. 1, to the extent of which reference is made to the description thereof. Identical or corresponding details are provided with the same reference symbols as in FIG.
  • FIG. 3 shows a coupling rod according to the invention in a further embodiment. This largely corresponds to the embodiment shown in FIG. 3, to which reference is made to the description. Identical or mutually corresponding details are provided with the same reference symbols as in the above figures.
  • a special feature of the embodiment according to FIG. 4 is that the two joint elements 4, 5' are designed differently.
  • One joint element 4, here on the left side is designed as a ball joint, as shown in the embodiment according to FIG.
  • the other joint element 5' here on the right side, is designed in the form of an elastic joint.
  • the elastic joint element 5′ comprises an elastic bearing part 13′′ and a connection part 14′′ connected thereto in the form of a rigid sleeve.
  • the elastic bearing part 13" can be made of rubber, for example, and can be connected to the carrier element 7 by injection molding or pressing.
  • the elastic bearing part 13" can have a circumferential, in particular concave, recess 25, which is encompassed by the ring section of the carrier element 7. As in the embodiment according to FIG.
  • the connecting element 3 can be designed with two C-shaped connecting sections 9, 9′.
  • the connecting section assigned to the elastic joint 5' is embedded in the carrier element 7 and largely encompasses the elastic bearing part 13".
  • the sleeve is preferably made of metal, for example aluminum or steel. The sleeve can be inserted into the bearing part 13". Alternatively, the bearing part 13" can be vulcanized onto the sleeve.
  • FIG. 5 shows a coupling rod according to the invention in a further embodiment. This largely corresponds to the embodiment shown in FIG. 4, to the extent of which reference is made to the description thereof. Identical or mutually corresponding details are provided with the same reference symbols as in the above figures.
  • the special feature of the embodiment according to FIG. 5 is that the two joint elements 4′, 5′ are designed as elastic joints as in FIG. 4, right side. Both joints are designed the same, with the left side shown in section, with the sleeve exploded, while the right side is shown in side view.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

L'invention concerne une bielle d'accouplement, comprenant : un élément de liaison (3) qui est produit à partir d'une matière plastique renforcée de fibres au moyen d'un processus de pultrusion, l'élément de liaison (3) comportant une partie entretoise (8) ayant un axe longitudinal (A3) et une partie de liaison (9, 9') ; un élément d'articulation (4, 5) ; et un élément de support (6, 7) qui est relié à l'élément de liaison (3) et à l'élément d'articulation (4, 5) et est produit à partir d'une matière plastique au moyen d'un surmoulage ; la matrice de la matière plastique renforcée de fibres étant un thermodurcissable et la partie de liaison étant déformée par rapport à la partie entretoise, une liaison de verrouillage entre la partie de liaison (9, 9') et l'élément de support (6, 7) étant formée par l'élément de support surmoulé. L'invention concerne également un procédé de production d'une bielle d'accouplement.
EP22822044.8A 2021-11-25 2022-11-24 Bielle d'accouplement et son procédé de production Pending EP4436807A1 (fr)

Applications Claiming Priority (2)

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DE102021130919.0A DE102021130919A1 (de) 2021-11-25 2021-11-25 Koppelstange und Verfahren zum Herstellen
PCT/EP2022/083097 WO2023094508A1 (fr) 2021-11-25 2022-11-24 Bielle d'accouplement et son procédé de production

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EP4436807A1 true EP4436807A1 (fr) 2024-10-02

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EP (1) EP4436807A1 (fr)
CN (1) CN118302311A (fr)
DE (1) DE102021130919A1 (fr)
WO (1) WO2023094508A1 (fr)

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DE102023205514A1 (de) * 2023-06-14 2024-03-28 Zf Friedrichshafen Ag Verfahren zur Herstellung eines Verbindungsbauteils
DE102024105662A1 (de) * 2024-02-28 2025-09-11 Deutsche Institute für Textil- und Faserforschung Denkendorf Stiftung des öffentlichen Rechts Verfahren und Anordnung für die Herstellung von Profilen aus faserverstärkten Kunststoffen

Family Cites Families (16)

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Publication number Priority date Publication date Assignee Title
US6324940B1 (en) * 1997-08-13 2001-12-04 Maclean-Fogg Company Composite link
FR2862559A1 (fr) 2003-11-24 2005-05-27 Cf Gomma Spa Bras de suspension d'essieu pour vehicule automobile et un procede de fabrication
EP1733859B1 (fr) 2005-06-14 2012-07-18 Industria Auxiliar Alavesa, S.A. (Inauxa) Procédé et dispositif pour la fabrication d'un élément de connexion et de transmission d'efforts par surmoulage, et élément de connexion et de transmission d'efforts
DE102005034210B4 (de) 2005-07-19 2008-04-10 Zf Friedrichshafen Ag Verfahren zur Herstellung eines Kugelgelenks und danach hergestelltes Gelenk
DE202007001892U1 (de) 2007-02-03 2008-06-12 Hqm Sachsenring Gmbh Gelenkstange
FR2922850B1 (fr) * 2007-10-30 2009-12-18 Scoma Articulation a rotule a debattement limite.
DE102010041791B4 (de) 2010-09-30 2013-05-29 Zf Friedrichshafen Ag Fahrzeugbauteil
DE102013007284A1 (de) 2013-04-27 2014-10-30 Volkswagen Ag Verbindungsstrebe und Verfahren zur Herstellung derselben
DE102014220796A1 (de) 2014-10-14 2016-04-14 Zf Friedrichshafen Ag Gelenkstange für ein Kraftfahrzeug
DE102015206917B4 (de) * 2015-04-16 2022-03-17 Bayerische Motoren Werke Aktiengesellschaft Pultrusion von Endlosprofilen mit diskontinuierlichem Querschnittsverlauf
DE102016004833A1 (de) * 2016-04-21 2017-10-26 Man Truck & Bus Ag Lenkerkonstruktion für ein Kraftfahrzeug, insbesondere Längslenkerkonstruktion
EP3385097B1 (fr) * 2017-04-05 2020-03-25 Engineering Developments for Automotive Industry, S.L. Liaison de stabilisateur pour suspensions d'automobiles
DE102017207164A1 (de) 2017-04-28 2018-10-31 Zf Friedrichshafen Ag Achsstrebe und Verfahren zur Herstellung einer Achsstrebe
DE102018213322A1 (de) 2018-08-08 2020-02-13 Zf Friedrichshafen Ag Mehrpunktlenker für ein Fahrwerk eines Kraftfahrzeugs
DE102018213321A1 (de) * 2018-08-08 2020-02-13 Zf Friedrichshafen Ag Mehrpunktlenker für ein Fahrwerk eines Kraftfahrzeugs
DE102019218124B3 (de) 2019-11-25 2021-01-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum formschlüssigen Verbinden eines Hohlkörpers aus faserverstärktem Kunststoff mit einem Metallkörper

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CN118302311A (zh) 2024-07-05
US20250001822A1 (en) 2025-01-02
WO2023094508A1 (fr) 2023-06-01
DE102021130919A1 (de) 2023-05-25

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