EP3833557A1 - Mehrpunktlenker für ein fahrwerk eines kraftfahrzeugs - Google Patents
Mehrpunktlenker für ein fahrwerk eines kraftfahrzeugsInfo
- Publication number
- EP3833557A1 EP3833557A1 EP19740510.3A EP19740510A EP3833557A1 EP 3833557 A1 EP3833557 A1 EP 3833557A1 EP 19740510 A EP19740510 A EP 19740510A EP 3833557 A1 EP3833557 A1 EP 3833557A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hollow profile
- section
- profile section
- point link
- stiffening 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- Withdrawn
Links
Classifications
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- 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
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- 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
- 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
- B60G2206/011—Modular constructions
-
- 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
- B60G2206/013—Constructional features of suspension elements, e.g. arms, dampers, springs with embedded inserts for material reinforcement
-
- 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]
Definitions
- Multi-point link for a chassis of a motor vehicle
- the invention relates to a multi-point link for a chassis of a motor vehicle, comprising at least one hollow profile section made of a fiber-reinforced plastic and at least one load introduction element made of a metallic material, according to the preamble of claim 1.
- Multi-point links for chassis of motor vehicles which have a hollow profile section made of a fiber-reinforced plastic and at least one load introduction element made of a metallic material
- DE 10 2010 053 843 A1 discloses a two-point link which is designed as a strut.
- the two-point link has a hollow profile section which is connected to a load introduction element via an inseparable, glued plug connection, which is referred to as an intermediate piece.
- the hollow profile section consists of a fiber-reinforced plastic and is manufactured in a pultrusion process.
- the load introduction element is made of a metallic material.
- profiles which have a constant cross-section over their longitudinal extent, is designed for maximum stresses which, however, do not occur in a ferry operation over the entire longitudinal extent, but only locally. Therefore, profiles generally have the disadvantage that they are usually oversized in large parts of their longitudinal extent and therefore have a higher mass than is required for the loads on which the design is based.
- the object of the invention is to provide a component for a motor vehicle which is designed as an at least partially made of fiber-reinforced plastic lightweight component and with which relatively high loads can be transmitted at the same time.
- the invention accordingly provides a multi-point link for a chassis of a motor vehicle, which has at least one hollow profile section made of a fiber-reinforced plastic and at least one load introduction element made of a metallic material.
- the hollow profile section When viewed in cross section, has at least one cavity which is designed as a circumferentially closed chamber.
- the hollow profile section and the load introduction element are connected to one another via an inseparable, glued plug connection.
- at least one stiffening element fixed to the hollow profile section is arranged in the chamber in order to increase the stiffness of the multi-point link.
- the hollow profile section can be stiffened in a load-oriented manner at the points at which increased stresses can occur during ferry operation. It is therefore not necessary to design the cross section of the hollow profile section over its entire longitudinal extent for a maximum stress that only occurs at one or more points on the hollow profile section. In this way, overdimensioning of the hollow profile section can be avoided and, at the same time, the material used for the multi-point link can be minimized.
- the stiffness is to be understood as the resistance of the multi-point link against elastic or plastic deformation or against breakage, in particular caused by a compressive force or a bending moment or a torsional moment. The increase in stiffness of the multi-point link is achieved in particular by increasing the stiffness of the hollow profile section.
- the at least one stiffening element increases the area moment of inertia or the section modulus of the hollow profile section in the area in which the stiffening element is firmly connected to the hollow profile section.
- the hollow profile section can be stiffened as a function of the types of stresses and stress levels present at various points in the course of its longitudinal extension.
- the hollow profile section can be straight or curved over its longitudinal extent. If the hollow profile section is designed as a straight hollow profile section, it preferably has a constant, column-like cross-sectional geometry over its entire longitudinal extent. If the hollow profile section is curved, it preferably has a constant radius of curvature. In particular, the hollow profile section is designed as an open profile section.
- An open profile section in the sense of the present invention is to be understood as a profile section which, when viewed in cross section, has ribs, flanges or the like pointing outward from the profile.
- the profile section can also be designed as a closed profile section, without ribs, flanges or the like pointing to the outside of the profile and, for example, have a rectangular or square tube cross section.
- the hollow profile section and the at least one stiffening element can consist of the same material or of different materials.
- the hollow profile section is in particular a section of a straight endless profile.
- Wall thicknesses of the hollow profile section are dimensioned significantly smaller than its cross section.
- the wall thicknesses of the hollow profile section are preferably 10 to 20 percent, particularly preferably 10 to 15 percent, of the outer dimensions of the hollow profile section if the latter has a cross-sectional geometry that can be described by an at least substantially adjacent square surface.
- the hollow profile section is preferably designed as a pultruded hollow profile section made of a continuous fiber reinforced plastic. In this way, a particularly light multi-point handlebar can be represented.
- a pultruded hollow profile section is to be understood as a hollow profile section produced in a pultrusion process.
- the pultrusion process is a process for the cost-effective production of fiber-reinforced plastic profiles in a continuous process.
- the hollow profile section has reinforcing fibers which are distributed over the entire profile cross section and which extend in the longitudinal direction of the profile section, as a result of which high rigidity and strength are brought about in this direction.
- Relatively high proportions of elongated parts are advantageous for designing the hollow profile section in relation to buckling and / or bulges
- Fibers are arranged in edge areas of the profile cross section and at the same time also running in the longitudinal direction of the hollow profile section. In particular, all fibers are oriented in the longitudinal direction of the profile section.
- the pultruded hollow profile section has a fiber volume content of approximately 65 percent. In general, a fiber volume content between 50 percent and 75 percent is possible.
- both carbon fibers, glass fibers, aramid fibers or natural fibers can be used, each of which is embedded in a plastic matrix.
- the matrix system advantageously consists of a vinyl ester resin, since this can be processed well in the pultrusion process with very good chemical and mechanical properties.
- vinyl ester resin has good adhesion in combination with adhesives.
- an epoxy resin, a polyester resin, phenol resin or polyurethane resin can be used as the matrix material.
- the continuous fiber-reinforced plastic is in particular a fiber-plastic composite (FKV), which is formed from a plastic matrix with reinforcing fibers embedded therein, the reinforcing fibers being designed as continuous fibers.
- the fiber-plastic composite can be designed, for example, as a glass fiber-reinforced plastic composite (GRP) or carbon fiber-reinforced plastic composite (CFK) or as an aromatic fiber-reinforced plastic composite (AFK).
- GRP glass fiber-reinforced plastic composite
- CFK carbon fiber-reinforced plastic composite
- AFK aromatic fiber-reinforced plastic composite
- the hollow profile section and the at least one stiffening element consist of different materials, the load introduction element being formed in particular from an aluminum alloy.
- the at least one load introduction element is functionally, in particular rigid, connected to the hollow profile section and can introduce operating loads such as forces and / or moments into the hollow profile section.
- the load introduction element has an articulated receptacle.
- the load introduction element has an opening oriented perpendicular to a longitudinal direction of the hollow profile section.
- the opening can be pot-shaped; for example for receiving a joint ball of a ball pin of a ball joint.
- the opening can also be designed as a through opening; for example with a cylindrical through opening for receiving a molecular joint, which is also called the claw joint.
- the opening has an unprocessed inner circumferential surface in the installed state.
- the stiffening element can extend in a longitudinal direction of the hollow profile section over the entire length of the hollow profile section or over part of the entire length.
- the stiffening element is preferably designed with a constant cross section over its longitudinal extent.
- the stiffening element can be designed as an extruded profile, in particular an extruded aluminum profile.
- the stiffening element can also consist of a fiber composite plastic with reinforcing fibers, which can be in the form of woven fabrics, scrims or knitted fabrics and / or as continuous fibers.
- the stiffening element can also be contoured, for example cambered, in its longitudinal direction.
- the stiffening element can also consist of steel.
- stiffening element from a plastic foam or from a fiber-reinforced profile is also conceivable.
- the stiffening element can be closed around the circumference and at the same time be foamed with a high-strength plastic foam.
- the multi-point link can be a straight two-point link, that is, a rod-shaped link, extended in one spatial direction and primarily suitable for the transmission of forces.
- a two-point link acts primarily on tensile and / or compressive forces which are introduced into the hollow profile section via the two load introduction elements.
- the two-point link which can be designed as an axle strut for guiding a rigid axle of a commercial vehicle, has in particular a hollow profile section with a straight center line. In particular, this center line is congruent with a straight line through centers of the two load introduction elements.
- the two-point linkage designed as an axle strut, can act on it in addition to tensile, pressure and buckling stresses caused by acceleration and braking processes, as well as bending and torsion stresses caused by rolling movements of a vehicle body.
- the multi-point link may alternatively also be an odd two-point link with a curved profile section, the profile section preferably having a constant radius of curvature.
- the multi-point link can alternatively also be designed as a three-point link.
- Such a three-point link can be arranged in an upper link level of a chassis of a commercial vehicle and can be used to guide a rigid axle there.
- the three-point link preferably has two identical, straight hollow profile sections which converge in a common bearing area, which can be part of a central joint of a rigid axle, for example. With such an arrangement, the two profile sections are subjected to bending and compressive stresses in addition to tensile and compressive stresses.
- the multi-point link can also be designed as a four-point link, for example with two parallel, straight hollow profile sections, each with two load introduction elements arranged at opposite ends of the two hollow profile sections.
- the hollow profile sections of such a four-point link are subjected to tensile, pressure and, due to rolling movements of a vehicle body, bending and torsion during ferry operation.
- the multi-point link is in particular a built multi-point link, that is to say a multi-point link assembled from a plurality of separately manufactured individual parts, in particular the hollow profile section, the load introduction element and the stiffening element.
- This design has the advantage that, for example, the hollow profile section can be made variable in length, as a result of which different variants of the multi-point link can be implemented according to a modular principle.
- the reinforcement stiffening element with such a modular principle are each adapted to the variable length profile section.
- an inner circumferential surface of the chamber is operatively connected to an outer circumferential surface of the stiffening element.
- the chamber when viewed in cross section, is non-circular.
- the chamber has a polygonal, preferably quadrangular, cross section.
- the chamber has a rectangular cross section or, as a special form of a rectangular cross section, a square cross section.
- the chamber is sealed airtight when each of two ends of the hollow profile section is each connected to a load introduction element by an inseparable, glued plug connection.
- the stiffening element is preferably designed as a circumferentially closed tubular profile.
- a circumferentially closed tubular profile has a relatively high structural rigidity with a comparatively low mass.
- the circumferentially closed tubular profile which is arranged in the chamber and at the same time is firmly connected to the hollow profile section, can therefore achieve a significant increase in the area moment of inertia or the section modulus of the hollow profile section.
- the tubular profile in particular has a non-circular cross section.
- the tubular profile has a polygonal, in particular a square, cross section.
- the tubular profile is designed as a rectangular tubular profile, this embodiment including a square tubular profile as a special form of a rectangular tubular profile.
- the tubular profile can be designed as an extruded profile or a cold drawn tubular profile or a pultruded tubular profile.
- the tubular profile can also be designed as a longitudinally welded tubular profile.
- the stiffening element is expediently designed as a circumferentially closed multi-chamber profile. Due to the walls that separate the several chambers of the multi-chamber profile, a stiffening element, which is designed as a circumferentially closed multi-chamber profile, has a particularly high structural rigidity. As a result, a multi-chamber profile can also have one make a particularly high contribution to increasing the area moment of inertia or the resistance moment of the hollow profile section.
- the multi-chamber profile is preferably circumferentially non-circular, in particular rectangular or square.
- the multiple chambers of the multi-chamber profile can be integrated into a rectangular tube profile, for example.
- the multiple chambers of the multi-chamber profile can be geometrically identical or geometrically different or partially geometrically identical and partially geometrically different.
- the stiffening element advantageously at least essentially completely fills the chamber of the hollow profile section when viewed in a cross section. What is meant by this is that the stiffening element, at least essentially, lies completely against an inner wall of the chamber, as a result of which there is a positive connection between the stiffening element and the hollow profile section.
- the wording, according to which the stiffening element at least essentially completely fills the chamber of the hollow profile section, does not necessarily stipulate that the stiffening element must be solid. Because the stiffening element at least essentially completely fills the chamber, the stiffening effect of the stiffening element is given solely by its geometric shape.
- the stiffening element is preferably designed as a circumferentially closed tubular profile or as a multi-chamber profile. In particular, the inner circumferential surface of the chamber of the hollow profile section facing the stiffening element is just as large as an outer circumferential surface of the stiffening element.
- the stiffening element at least essentially completely fills the chamber, the torsional stiffness and also the bending stiffness of the hollow profile section can be significantly increased. In this way, if the stiffening element extends sufficiently in the longitudinal direction of the hollow profile section, damage to the hollow profile section made of fiber-reinforced plastic, for example, by abuse forces entered transversely to its longitudinal direction can be avoided. Such abuse forces can act, for example, if the multi-point link is designed as an axle strut, the hollow profile section of which is subjected to an abuse force transversely to its longitudinal direction. for example, by an improperly set jack. In this case, the stiffening element causes a local load diversion into the fiber-reinforced hollow profile section. At the same time, damage, in particular indentation, to the hollow profile section is avoided, in particular if the stiffening element at least substantially completely fills the chamber.
- the stiffening element is preferably integrally connected, in particular glued, to an inner peripheral surface of the chamber.
- the previously mentioned operative connection between the inner peripheral surface of the chamber and the outer peripheral surface of the stiffening element can be implemented particularly effectively.
- Shear forces acting in the longitudinal direction of the hollow profile section, for example caused by a bending stress of the hollow profile section, between the inner circumferential surface of the chamber and the outer circumferential surface of the stiffening element can be transmitted favorably through the integral connection.
- the stiffening element completely fills the chamber of the hollow profile section, when viewed in cross-section, at least essentially completely, the material connection of the stiffening element to the inner peripheral surface of the chamber also prevents local bulging of the hollow profile section.
- the integral connection is designed as an adhesive connection, epoxy adhesives, for example, are suitable as adhesives. The use of an adhesive facilitates insertion of the stiffening element into the chamber of the hollow profile section, because the adhesive acts like a lubricant in this procedure.
- the chamber of the hollow profile section expediently has, when viewed in cross section, narrow projections projecting inwards from an inner peripheral surface.
- the narrow thickenings extend in the form of strips in the longitudinal direction of the hollow profile section over its entire length.
- the thickenings have spacing surfaces facing the stiffening element, which touch the stiffening element or are spaced slightly from it. Strictly speaking, the outer circumferential surface of the stiffening element, which lies outside the thickenings, is kept at a minimum distance from the inner circumferential surface of the chamber.
- the stiffening element can substantially completely fill the chamber of the hollow profile section when viewed in a cross section.
- the thickenings represent guide surfaces when the stiffening element is inserted into the chamber of the hollow profile section.
- the thickenings project inwards from the inner peripheral surface of the chamber by less than 0.5 millimeters.
- the thickenings or the spacing surfaces of the thickenings extend less than 5 millimeters parallel to the outer circumferential surface of the stiffening element and are therefore kept relatively narrow. If the thickenings are too narrow, there is a risk that they will be pushed away when the stiffening element is inserted into the chamber. If the thickenings are too wide, this can have a negative effect on the durability of the adhesive connection between the aforementioned joining partners, because the optimum layer thickness of the adhesive is not achieved in the area of the thickenings.
- the stiffening element is non-positively fixed in the chamber, in particular by an interference fit.
- Such a non-positive connection can be achieved in that the stiffening element is strongly cooled before being inserted into the chamber of the hollow profile section. After a temperature equalization, there is a press fit between the two aforementioned joining partners.
- the hollow profile section is advantageously designed as a multi-chamber hollow profile section.
- the hollow section when viewed in cross section, has at least two cavities formed as circumferentially closed chambers.
- the area moment of inertia of the hollow profile section can be increased by a multi-chamber hollow profile section, depending on the geometric structure and the arrangement of the several chambers with respect to one another. This has an effect, in particular in the case of a bending load and / or a torsional load, but also in the case of a pressure load, in such a way that higher forces and / or moments can be transmitted.
- the cross-section of the multi-chamber hollow profile section has at least one transverse web through which the multiple chambers of the multi-chamber hollow profile section are separated from one another.
- the several chambers of the multi-chamber hollow profile section some or all of them can be provided with stiffening elements. In this way, the rigidity of the multi-point link can be set in a targeted manner.
- the hollow profile section When viewed in cross section, the hollow profile section preferably has at least one rib projecting outwards to further increase the bending stiffness and / or the torsional stiffness and / or the buckling stiffness.
- the outwardly projecting rib extends in particular perpendicular to the longitudinal direction of the hollow profile section.
- the at least one rib forms a rectangular or square partial cross section of the hollow profile section.
- the at least one rib projecting outwards causes an increase in the area moment of inertia and the torsion moment of inertia of the hollow profile section.
- the rib extends over the entire length of the hollow profile section with a constant cross section.
- the hollow profile section when viewed in cross section, has at least four outwardly projecting ribs. In particular, two of these at least four ribs, in relation to the cross section of the hollow profile section, are arranged in pairs opposite one another.
- An end section of the load introduction element advantageously has a spline with teeth that extend at least essentially in the longitudinal direction of the hollow profile section.
- the plug-toothed end section of the load introduction element and an end section of the hollow profile section interlock with one another and at least essentially in a form-fitting manner.
- the load introduction element is not massive trained but reduced by the volume of spaces between the teeth.
- only the associated end section of the profile section and adhesive is located in the connecting section.
- the teeth of the splines in the common connecting section are partially glued to the outer peripheral surfaces and partly to the inner peripheral surfaces of the end section of the hollow profile section.
- the rigidity of the load introduction element in the longitudinal direction of the hollow profile section is reduced.
- tensile forces attempt to pull the end section of the hollow profile section out of the spline in its longitudinal direction.
- the reduction in stiffness of the load introduction element in the area of the spline is due to the fact that the teeth of the spline experience an elastic expansion in the longitudinal direction of the hollow profile section when subjected to tensile stress than would be the case with a massive design of the load introduction element in the area of the spline.
- the splines are penetrated by lattice-like through grooves extending perpendicular to the longitudinal direction of the hollow profile section and at the same time penetrating, at least partially, cutting through grooves.
- the teeth of the spline have a length that is essentially at least twice as large as a maximum width of the teeth, which means that both with a tensile load and with a compressive load, a relatively high elastic expansion capacity of the spline in the longitudinal direction of the hollow profile section is given.
- the relatively thin teeth make it possible to reduce the stresses that occur in the adhesive layer, particularly when the hollow profile section with its two bearing areas is subjected to tensile stress.
- the teeth are formed in one piece with the load introduction element.
- the teeth of the splines have a rectangular shape along their longitudinal extent in the longitudinal direction of the end section of the load introduction element or square full cross-section.
- the through grooves at least partially have a straight course in the longitudinal direction of the hollow profile section.
- the teeth of the splines delimit at least two through four longitudinal sides of through grooves that extend in the longitudinal direction of the hollow profile section.
- the teeth with two, three or four longitudinal sides extending in the longitudinal direction of the hollow profile section can border on through-grooves.
- the through grooves extending perpendicular to the longitudinal direction of the hollow profile section have a constant width in a first direction and a varying width in a second direction extending perpendicular to the first direction.
- all through grooves that extend perpendicular to the longitudinal direction of the hollow profile section in the same direction are of the same design; thus have a constant or a variable width.
- the through grooves of constant width have a machined, preferably machined, in particular milled, surface.
- the through grooves with varying width have an unprocessed, in particular extruded, surface, as a result of which no machining costs are incurred.
- the through grooves with a varying width in the region of tooth bases and / or in the region of free ends of the teeth which face the hollow profile section have an increased width.
- the free ends of the teeth facing the hollow profile section perpendicular to the longitudinal direction of the hollow profile section have a minimal cross-sectional area.
- teeth of the splines, based on their course in the longitudinal direction of the hollow profile section have the smallest cross-sectional area at their free ends.
- the teeth have an additionally reduced rigidity in the longitudinal direction of the hollow profile section at their free ends.
- the free, facing the hollow profile section, Ends of the teeth perpendicular to the longitudinal direction of the hollow profile section are at a greater distance from one another at least in one direction of extension than is the case in at least one other area in the longitudinal direction of the hollow profile section.
- the through grooves of varying width have an increased width in the region of the free ends of the teeth.
- the adhesive by means of which the splines are connected to the end section of the hollow profile section, at least partially has an increased layer thickness in the region of the free ends of the teeth. As a result of the increased adhesive layer thickness, tensions in the adhesive layer can be reduced locally and distributed more evenly over the entire connecting section.
- the teeth of the splines on teeth feet are at least partially tapered to further reduce the rigidity of the splines in the longitudinal direction of the hollow profile section.
- the tooth feet are tapered on their long sides, which border on through-grooves of variable width. Since the hollow profile section has a constant cross section over its longitudinal extent, an at least partially thickened adhesive layer results in the region of the tooth feet. In particular, widened interdental spaces in the area of the tooth feet, which result from the tapered tooth feet, are filled with adhesive. As a result of the increased adhesive layer thickness, local stresses in the adhesive layer are reduced and distributed more evenly over the entire connecting section.
- At least one tooth of the spline is continuously tapered over its longitudinal extent towards the profile section. This is to be understood in such a way that the at least one tooth on its tooth base is a maximum
- the at least one tooth perpendicular to the longitudinal direction of the profile section also has a stiffness that is continuously reduced toward its free end
- the continuous rejuvenation of the at least one tooth also contributes to a continuous one Transition of the stiffness ratios in the longitudinal direction of the hollow profile section.
- the at least one tooth which tapers continuously towards the hollow professional section is a canine tooth with two longitudinal sides which extend in the longitudinal direction of the hollow profile section and which adjoin through grooves.
- the load introduction element is designed as a profile piece, in particular an extruded profile piece, with unprocessed outer peripheral surfaces and / or inner peripheral surfaces, which extend in a longitudinal direction of the profile.
- This has the advantage that relatively inexpensive rod material, in particular extruded rod material made of an aluminum alloy, can be used as the starting material for the load introduction element.
- the profile longitudinal direction of the profile piece extends in particular perpendicular to the longitudinal direction of the hollow profile section.
- a cold drawn or rolled profile piece is also possible, for example.
- the outer circumferential surfaces of the profile piece can be all surfaces which are wetted when the profile piece is completely immersed in a water bath, with any existing cavities being sealed beforehand.
- a profile piece is to be understood as a piece of an endless profile.
- the profile piece has a constant cross-sectional geometry over its longitudinal extent.
- the hollow profile section can be inserted into the spline in its longitudinal direction up to the stop or be spaced from this maximum position.
- the splines are particularly advantageous for tensile and / or compressive loads; but also favorable for torsion and / or bending stress.
- the length of the connecting section essentially corresponds to an external dimension of the cross section of the hollow profile section. This gives the connecting section a relatively large length. This has an effect in particular when the hollow profile section is loaded with its load introduction element at higher temperatures, when the adhesive softens somewhat under the influence of temperature and thereby becomes elastic. shears. In this case, the adhesive connection is also stressed in the area of a tooth base when the hollow profile section and the load introduction element are subjected to tensile stress.
- the relatively large length of the connecting section thus represents a resilience reserve at relatively high ambient temperatures. This is due to the fact that the adhesive has a lower strength and rigidity at higher temperatures, as a result of which tensile stresses are shifted in the direction of the tooth feet , A significantly longer length of the connecting section no longer significantly increases the load-bearing capacity of the connection between the bearing area and the hollow profile section. A significantly shorter length of the connecting section leads to a reduction in the load-bearing capacity.
- the wording that the splines and the end section of the hollow section section “at least essentially” interlock positively with one another is intended to express that the two end regions do not lie directly against one another - at least not over the full area, but rather a slight distance have each other, this slight distance is filled by an adhesive that is distributed over the entire surface.
- the glued plug connection has in particular an epoxy adhesive.
- other adhesives such as methyl methacrylate adhesives, can also be used.
- the spline is particularly advantageous in connection with the hollow profile section, because by gluing the teeth of the spline with outer peripheral surfaces of the end section of the hollow profile section and at the same time with inner peripheral surfaces of the chambers, a relatively large adhesive surface can be realized.
- the spline is also advantageous in the manufacture of the multi-point link, because excess glue can be easily removed through the through grooves.
- Each of two ends of the hollow profile section is advantageously connected to a load introduction element in each case by an inseparable, glued plug connection.
- the at least one stiffening element is arranged between the two plug connections and at the same time at a distance from the two plug connections.
- the stiffening element is arranged symmetrically with respect to the center between the two plug connections. This arrangement is particularly favorable because the danger of buckling is greatest when the hollow profile section is subjected to pressure in the middle between the two plug connections.
- each of two ends of the hollow profile section is each connected to a load introduction element by an inseparable, glued plug connection.
- the at least one stiffening element extends over the entire length between the two plug connections without interruption, without intervening in the plug connections.
- the hollow profile section is largely stiffened.
- the mentioned reduction in stiffness is retained in the area of the spline if the spline is formed from teeth extending in the longitudinal direction of the hollow profile section.
- the stiffening element engages in the plug connection.
- the stiffening element in this embodiment is designed in particular as a tubular profile or as a multi-chamber profile.
- the tubular profile or the multi-chamber profile partially or completely encircles teeth of the spline.
- teeth of the splines are integrally connected to the stiffening element by an adhesive layer.
- the stiffening element extends in one piece over the entire length of the hollow profile section.
- This design has the advantage that the hollow profile section can be produced together with the saponification element. In this way, a separate operation in which the reinforcement tion element is inserted into the chamber of the hollow profile section can be saved.
- the stiffening element is also preferably designed as a tubular profile or as a multi-chamber profile in this embodiment.
- the tubular profile or the multi-chamber profile also partially or completely encircles teeth of the spline here.
- teeth of the splines are integrally connected to the stiffening element by an adhesive layer.
- Components of a damage detection system are advantageously integrated in the chamber and / or in the stiffening element. This is particularly advantageous if the stiffening element is designed as a circumferentially closed tubular profile. In this case, the components are accommodated in an already available installation space and at the same time are protected against environmental influences, in particular if the chamber of the hollow profile section is sealed airtight.
- the damage detection system is used to detect damage to the multi-point link, in particular fiber-reinforced plastic components of the multi-point link.
- the components can be, for example, a monitoring module and / or an electrical energy store.
- an outer stiffening element is integrally connected to an outer circumferential surface of the hollow profile section. If one side of the outer circumferential surface of the hollow profile section, in particular a side facing a roadway in the installed state, is covered over its entire longitudinal extent by the outer stiffening element, a stone chip protection is provided for the hollow profile section in addition to the stiffening effect.
- the outer stiffening element can be as long as the hollow profile section or shorter than the hollow profile section.
- the outer stiffening element is arranged circumferentially between two ribs which, when looking at the hollow profile section in cross section, protrude outwards.
- the integral connection is preferably designed as an adhesive connection.
- the outer stiffening element is preferably made of aluminum.
- the outer stiffening element can also be formed from a fiber-reinforced, in particular an endless fiber-reinforced, plastic.
- Figure 1 is a perspective view of a chassis arrangement according to the prior art.
- FIG. 2 shows a perspective, partially exploded illustration of a multi-point handlebar according to a first embodiment of the invention
- FIG. 3 shows a sectional view of the multi-point link from FIG. 2 in accordance with the section A - A given there;
- FIG. 4 is a sectional view of a hollow profile section of a multi-point link according to a second embodiment of the invention.
- FIG. 5 shows a perspective representation of a load introduction element of the multi-point link from FIG. 2;
- FIG. 6 shows a sectional view of the multi-point link from FIG. 2 in accordance with the section course BB indicated there;
- FIG. 7 shows in a longitudinal section a multi-point link according to a third embodiment of the invention.
- FIG. 8 shows in a longitudinal section a multi-point link according to a fourth embodiment of the invention.
- FIG. 10 shows in a longitudinal section a multi-point link according to a sixth embodiment of the invention
- Fig. 1 1 in a perspective view of a multi-point link according to a seventh embodiment of the invention
- Fig. 12 is a perspective view of a multi-point link according to an eighth embodiment of the invention.
- FIG. 1 shows a part of a chassis 1 which is part of a motor vehicle, in the present case a commercial vehicle 2, the chassis 1 having two axle struts 3 arranged in a lower link plane.
- the two axle struts 3 are each connected at one end by a molecular joint to a vehicle axle designed as a rigid axle 5.
- the axle struts 3 are each indirectly connected to a vehicle frame 6, also by means of a molecular joint.
- the rigid axle 5 is guided by a four-point link 7 which is arranged in an upper link level and is essentially X-shaped.
- the four-point link 7 combines the functions of a three-point link and a separate roll stabilizer in one component.
- the four-point link 7 is connected in a frame-side bearing area 4 to the vehicle frame 6 by two molecular joints and in an axle-side bearing area 10 by two molecular joints to the rigid axle 5. Two of the total of four molecular joints are covered by a longitudinal member of the vehicle frame 6. As already indicated, the four-point link 7 could be replaced by a three-point link if the undercarriage 1 additionally had a roll stabilizer.
- FIG. 2 shows a multi-point link 20 for a chassis of a motor vehicle, wherein the multi-point link 20 is designed as a straight two-point link.
- the two-point link 20 is a built axle strut.
- the two-point link 20 has a straight hollow profile section 21 made of a fiber-reinforced plastic and at the two ends of the hollow profile section 21 each have a load introduction element 22 made of aluminum.
- the hollow profile section 21 has two cavities 23, each of which is designed as a circumferentially closed chamber 23.
- the hollow profile section 21 and in each case one of the two load introduction tion elements 22 connected to each other via a non-detachable, glued plug connection 25.
- a stiffening element 26 which is fixedly connected to the hollow profile section 21 and is designed with a constant cross section over its longitudinal extent, is arranged in one of the chambers 23.
- the stiffening element 26 extends in a longitudinal direction 27 of the hollow profile section 21 over the entire length of the hollow profile section 21 and is designed as an extruded aluminum profile.
- Each load introduction element 22 each has an end section 28 which is designed as a spline 29 with teeth 30 which extend at least substantially in the longitudinal direction 27 of the hollow profile section 21.
- the hollow profile section 21 is designed as a multi-chamber hollow profile section, the multi-chamber hollow profile section 21 being designed as a two-chamber hollow profile section with a lower chamber 23 and an upper chamber 23
- the stiffening element 26 arranged in the lower chamber 23 of the hollow profile section 21 is designed as a circumferentially closed rectangular tubular profile that essentially completely fills the lower chamber 23, with an intermediate space between an inner peripheral surface 31 of the chamber 23 and an outer peripheral surface 32 of the stiffening element 26 is filled with an adhesive 33.
- the upper chamber 23 of the hollow profile section 21, in which there is no stiffening element 26, has a total of six narrow thickenings 34 projecting from the inner circumferential surface 31 towards the center of the chamber 23.
- the narrow thickenings 34 extend in the form of strips in the longitudinal direction 27 of the hollow profile section 21 over its entire length. Thickenings 34 are arranged in the same way in the lower chamber 23. These thickenings 34 have spacing surfaces 35 facing the stiffening element 26, which contact the stiffening element 26 or are slightly spaced therefrom.
- the upper and the lower chamber 23 are separated from one another by a transverse web 36 of the hollow profile section 21 and at the same time are arranged symmetrically with respect to a line of symmetry extending in the longitudinal direction of the transverse web 36.
- the hollow profile section 21 when viewed in cross section, points six outwards protruding ribs 37 on. Based on a center line drawn in, two of the six ribs 37 are arranged in pairs opposite one another.
- FIG. 4 shows a hollow profile section 21 of a multi-point link 20, the hollow profile section 21 having only one chamber 23.
- the chamber 23 is essentially completely filled by a stiffening element 26, the stiffening element 26 being designed as a circumferentially closed multi-chamber profile.
- the stiffening element 26 is glued to an inner peripheral surface 31 of the chamber 23.
- two outer stiffening elements 38 are glued to an outer peripheral surface 39 of the hollow profile section 21.
- FIG. 5 it can be seen that the splines 29 of the load introduction element 22 from FIG. 2 are penetrated by grid-like through grooves 40 which extend perpendicularly to the longitudinal direction 27 of the hollow profile section 21 and partially intersect at the same time.
- the teeth 30 of the splines 29 have a length that is approximately twice as large as the maximum width of the teeth 30.
- the load introduction element 22, which is designed as an extruded profile piece, has an orientation perpendicular to a longitudinal direction 27 of the hollow profile section 21 Opening 41 for receiving a molecular joint, not shown.
- the stiffening element 26 engages in the plug connection 25.
- the stiffening element 26 is designed as a rectangular tubular profile and completely surrounds a solid tooth 30 of the splines 29.
- the stiffening element 26 is glued to the tooth 30, which it surrounds all round, and at the same time to the inner circumferential surface 31 of the lower chamber 23 over the entire surface.
- the upper chamber 23 is filled by a further tooth 30 of the splines 29 and an adhesive layer 33 applied over the entire surface, the adhesive layer 33 integrally connecting the outer peripheral surface 32 of the stiffening element 26 to the inner peripheral surface 31 of the upper chamber 23.
- Fig. 7 shows a two-point link 20 with a hollow profile section 21, the two ends of which are each connected by an inseparable, glued plug connection 25 Load introduction element 22 are connected.
- a stiffening element 26 is arranged in a chamber 23 of the hollow profile section 21 centrally between the two plug connections 25 and at the same time at a distance from the two plug connections 25.
- the stiffening element 26 is designed as a circumferentially closed tubular profile which, with its outer circumferential surface 32, is glued over the entire surface to an inner circumferential surface 31 of the chamber 23.
- Components 42 of a damage detection system are integrated both in the chamber 23 and in the stiffening element 26.
- a monitoring module is arranged in the stiffening element 26 and an electrical energy store of the damage detection system is arranged in the chamber 23.
- Fig. 8 shows a two-point link 20 with a hollow profile section 21, the two ends of which are each connected by a non-detachable, glued plug connection 25, each with a load introduction element 22.
- a stiffening element 26 is arranged in a chamber 23 of the hollow profile section 21 centrally between the two plug connections 25 and at the same time at a distance from the two plug connections 25.
- Two further stiffening elements 26 each engage in one of the two plug connections 25 and in each case enclose a tooth 30 of a plug toothing 29 of the two load introduction elements 22.
- the two last stiffening elements 26, like the hollow profile section 21, are almost to each other inserted into the toothing 29 as far as it will go and at the same time each extend 20 millimeters out of the respective toothing 29 in the direction of the opposite load introduction element 22.
- each of two ends of a hollow profile section 21 is each connected to a load introduction element 22 by an inseparable, glued plug connection 25.
- a tubular stiffening element 26 extends uninterruptedly over the entire length of the hollow profile section 21 between the two plug connections 26 without intervening in the two plug connections 25.
- FIG. 10 shows a two-point link 20 in which each of two ends of a hollow section section 21 is in each case connected by a non-detachable, glued plug connection 25 with because a load introduction element 22 is connected.
- a stiffening element 26 is arranged in a chamber 23 of the hollow profile section 21 and is firmly connected to the hollow profile section 21 by a circumferential press fit. The stiffening element 26 extends in one piece over the entire length of the hollow profile 21 and engages in the two plug connections 25.
- Fig. 1 1 shows a multi-point link 20, which is designed as a three-point link and has three load introduction elements 22.
- the three-point link 20 also has two identical, straight hollow profile sections 21 which converge in a common bearing area which is formed by one of the three aforementioned load introduction elements 22.
- This load introduction element 22 has two splines 29 into which an end portion of one of the two hollow profile portions 21 engages in a connection portion 24.
- Each hollow profile section 21 has a chamber 23, not shown, in each of which a stiffening element 26, likewise not shown, is arranged, which is firmly connected to the hollow profile section 21.
- a multi-point link 20 shown in FIG. 12 is designed as a four-point link which has two hollow profile sections 21 which are spaced apart from one another and which are fixedly connected to one another by a coupling element 43.
- Each hollow profile section 21 has a chamber 23, not shown, in which a stiffening element 26, also not shown, is arranged, which is in each case firmly connected to the associated hollow profile section 21.
- each hollow profile section 21 is surrounded on three sides by an external stiffening element 38 in a central region of its longitudinal extent and is glued to it. On the fourth outer circumferential side of the hollow profile sections 21, these are each connected to the coupling element 43.
- Each outer stiffening element 38 has two tabs spaced parallel to one another, the four tabs meeting in the middle between the two hollow profile sections 21 in pairs.
- the tabs are thus U-shaped when viewed in cross section.
- the tabs which are glued over their entire surface on sides of the coupling element 43 facing away from one another, represent function-integrating elements of the external stiffening elements 38.
- the tabs serve to secure the fixed To reinforce te connection between the hollow profile sections 21 and the coupling element 38.
- a load introduction element 22 with a molecular joint is arranged at each end of the two hollow profile sections 21 of the four-point link 20.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
- Body Structure For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018213322.0A DE102018213322A1 (de) | 2018-08-08 | 2018-08-08 | Mehrpunktlenker für ein Fahrwerk eines Kraftfahrzeugs |
PCT/EP2019/068470 WO2020030369A1 (de) | 2018-08-08 | 2019-07-10 | Mehrpunktlenker für ein fahrwerk eines kraftfahrzeugs |
Publications (1)
Publication Number | Publication Date |
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EP3833557A1 true EP3833557A1 (de) | 2021-06-16 |
Family
ID=67314738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19740510.3A Withdrawn EP3833557A1 (de) | 2018-08-08 | 2019-07-10 | Mehrpunktlenker für ein fahrwerk eines kraftfahrzeugs |
Country Status (5)
Country | Link |
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US (1) | US11485185B2 (de) |
EP (1) | EP3833557A1 (de) |
CN (1) | CN112533780A (de) |
DE (1) | DE102018213322A1 (de) |
WO (1) | WO2020030369A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018221892A1 (de) * | 2018-12-17 | 2020-06-18 | Zf Friedrichshafen Ag | Fahrwerklenker für ein Kraftfahrzeug |
DE102019206436A1 (de) * | 2019-05-06 | 2020-11-12 | Schäfer MWN GmbH | Mehrpunktlenker für ein Fahrwerk eines Fahrzeugs |
DE102019206435A1 (de) * | 2019-05-06 | 2020-11-12 | Schäfer MWN GmbH | Mehrpunktlenker für ein Fahrwerk eines Fahrzeugs |
DE102021130919A1 (de) | 2021-11-25 | 2023-05-25 | Muhr Und Bender Kg | Koppelstange und Verfahren zum Herstellen |
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FR2469605A1 (fr) * | 1979-11-08 | 1981-05-22 | Rech Meca Appliquee | Bielle ou objet analogue |
JP3705384B2 (ja) | 1996-10-05 | 2005-10-12 | 東邦テナックス株式会社 | サスペンションアームおよびその製造方法 |
US6869091B1 (en) * | 2000-11-07 | 2005-03-22 | Meritor Suspension Systems Company | Method for enhancing the physical characteristics of a suspension component |
DE10154210A1 (de) * | 2001-11-07 | 2003-05-15 | Zf Lemfoerder Metallwaren Ag | Lageraufnahme einer aus Verbundwerkstoffen hergestellten Kraftverbindungsstrebe |
US20050011592A1 (en) * | 2001-11-30 | 2005-01-20 | Smith James B. | Stabilizer bar |
US8157469B2 (en) * | 2006-11-22 | 2012-04-17 | The Boeing Company | Composite structural member and method for producing the same |
CA2611281A1 (en) * | 2007-11-20 | 2009-05-20 | Multimatic Inc. | Structural i-beam automotive suspension arm |
EP2266788A1 (de) * | 2009-06-26 | 2010-12-29 | Bd Invent S.A. | Herstellungsverfahren von Verbund-Pleuelstangen und nach diesem Verfahren erhaltene Pleuelstangen |
DE202010006303U1 (de) * | 2010-04-30 | 2010-08-19 | Gmt Gummi-Metall-Technik Gmbh | Zug-Druck-Stange aus kohlenstofffaserverstärktem Kunststoff |
IT1400618B1 (it) * | 2010-05-12 | 2013-06-14 | Sistemi Sospensioni Spa | Elemento strutturale in materiale composito, particolarmente per sospensione di veicolo |
DE102010053843A1 (de) | 2010-12-08 | 2012-06-14 | Daimler Ag | Verbindungsanordnung |
DE102011079654A1 (de) * | 2011-07-22 | 2013-01-24 | Zf Friedrichshafen Ag | Vierpunktlenker |
US8904904B2 (en) | 2011-11-03 | 2014-12-09 | The Boeing Company | Tubular composite strut having internal stiffening |
DE102012018553A1 (de) * | 2012-09-20 | 2014-03-20 | Audi Ag | Lenker für eine Radaufhängung eines Kraftfahrzeugs |
BE1021537B1 (fr) * | 2012-10-11 | 2015-12-09 | Bd Invent S.A. | Bielle monobloc |
FR2997034B1 (fr) * | 2012-10-18 | 2015-05-01 | Epsilon Composite | Procede de collage de deux pieces soumises a des efforts de traction, pieces collees obtenues |
DE102013004010B4 (de) * | 2013-03-08 | 2016-02-18 | Audi Ag | Achslenker für ein Kraftfahrzeug |
DE102013007375A1 (de) * | 2013-04-27 | 2014-03-20 | Daimler Ag | Fahrwerksteil, insbesondere Querlenker, für einen Kraftwagen und Verfahren zum Herstellen eines Fahrwerksteils |
FR3024399B1 (fr) * | 2014-07-31 | 2016-08-05 | Renault Sa | Suspension de vehicule automobile a barre de torsion composite renforcee |
DE102014011861A1 (de) * | 2014-08-09 | 2016-02-11 | Man Truck & Bus Ag | Vierpunktlenker |
DE102014218601A1 (de) * | 2014-09-16 | 2016-03-17 | Bayerische Motoren Werke Aktiengesellschaft | Radführender Lenker eines Fahrzeug-Fahrwerks |
DE102015209001B4 (de) * | 2015-05-15 | 2017-02-23 | Ford Global Technologies, Llc | Radaufhängungseinheit für ein Kraftfahrzeug |
DE102015214248A1 (de) * | 2015-07-28 | 2017-02-02 | Zf Friedrichshafen Ag | Verbindungsrohr, Lenk- oder Spurstange mit einem solchen Verbindungsrohr und Verfahren zur Herstellung eines solchen Verbindungsrohres |
DE102016215114A1 (de) * | 2016-08-12 | 2018-02-15 | Volkswagen Aktiengesellschaft | Anordnung mit einem Crashprofil und einem Lastweiterleitungselement an einem Kraftfahrzeug, Lastweiterleitungselement sowie Kraftfahrzeug oder Fahrzeugtür |
US10272991B2 (en) * | 2016-06-23 | 2019-04-30 | Goodrich Corporation | Metallic composite joint |
DE102016211213A1 (de) * | 2016-06-23 | 2017-12-28 | Zf Friedrichshafen Ag | Achsstrebe für ein Fahrzeug |
DE102016211211A1 (de) * | 2016-06-23 | 2017-12-28 | Zf Friedrichshafen Ag | Achsstrebe für ein Fahrzeug |
DE102017207164A1 (de) * | 2017-04-28 | 2018-10-31 | Zf Friedrichshafen Ag | Achsstrebe und Verfahren zur Herstellung einer Achsstrebe |
DE102017207166A1 (de) * | 2017-04-28 | 2018-10-31 | Zf Friedrichshafen Ag | Vierpunktlenker |
DE102017213564A1 (de) * | 2017-08-04 | 2019-02-07 | Zf Friedrichshafen Ag | Dreipunktlenker und Herstellungsverfahren für einen Dreipunktlenker |
-
2018
- 2018-08-08 DE DE102018213322.0A patent/DE102018213322A1/de active Pending
-
2019
- 2019-07-10 WO PCT/EP2019/068470 patent/WO2020030369A1/de unknown
- 2019-07-10 EP EP19740510.3A patent/EP3833557A1/de not_active Withdrawn
- 2019-07-10 CN CN201980050412.7A patent/CN112533780A/zh active Pending
- 2019-07-10 US US17/266,364 patent/US11485185B2/en active Active
Also Published As
Publication number | Publication date |
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US20210316584A1 (en) | 2021-10-14 |
CN112533780A (zh) | 2021-03-19 |
WO2020030369A1 (de) | 2020-02-13 |
US11485185B2 (en) | 2022-11-01 |
DE102018213322A1 (de) | 2020-02-13 |
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