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WO2018158031A1 - Procédé de réalisation d'un ressort à lames, ressort à lames et suspension de roue - Google Patents

Procédé de réalisation d'un ressort à lames, ressort à lames et suspension de roue Download PDF

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Publication number
WO2018158031A1
WO2018158031A1 PCT/EP2018/052596 EP2018052596W WO2018158031A1 WO 2018158031 A1 WO2018158031 A1 WO 2018158031A1 EP 2018052596 W EP2018052596 W EP 2018052596W WO 2018158031 A1 WO2018158031 A1 WO 2018158031A1
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WO
WIPO (PCT)
Prior art keywords
leaf spring
plastic
finished product
semi
product
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.)
Ceased
Application number
PCT/EP2018/052596
Other languages
German (de)
English (en)
Inventor
Ignacio Lobo Casanova
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.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of WO2018158031A1 publication Critical patent/WO2018158031A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
    • F16F1/366—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers made of fibre-reinforced plastics, i.e. characterised by their special construction from such materials
    • F16F1/368—Leaf springs
    • F16F1/3683—Attachments or mountings therefor
    • 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
    • B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/08—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only arranged substantially transverse to the longitudinal axis of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/005—Ball joints
    • 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
    • B29L2031/774—Springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/11—Leaf spring
    • B60G2202/114—Leaf spring transversally arranged
    • 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
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • 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
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/121—Mounting of leaf springs
    • 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
    • B60G2204/41—Elastic mounts, e.g. bushings
    • 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
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/428—Leaf springs
    • 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
    • B60G2206/70—Materials used in suspensions
    • B60G2206/73—Rubber; Elastomers

Definitions

  • the invention relates to a method for producing a leaf spring, in particular a leaf spring for a suspension, with at least two the leaf spring sections embracing connection components, wherein the leaf spring is made of a continuous fiber reinforced first plastic semi-finished product.
  • the invention relates to a leaf spring, in particular a leaf spring for a suspension, with at least two the leaf spring sections embracing connection components, wherein the leaf spring is formed of a continuous fiber-reinforced plastic first semifinished product.
  • the invention has a wheel suspension for a motor vehicle with at least one aforementioned leaf spring to the object.
  • Leaf springs are commonly used for suspension on a vehicle to cushion it against rough road conditions.
  • Such vehicles may in particular be passenger cars, trucks and commercial vehicles, but also rail vehicles and the like.
  • holding elements with bearings arranged separately on the holding elements are usually provided at two central attachment points of the leaf spring.
  • Such holding elements are usually designed as metal shells arranged opposite one another, which surround the leaf spring in sections. Between the respective half-shell and the leaf spring rubber mats are then often arranged, which serve the vibration damping and the fixation of the leaf spring in the connection points.
  • the outside of the holding elements arranged bearings are designed as bearing bushes made of metal with rubber bearings arranged therein and serve the connection to the body. In addition, the bearings connect the two holding elements together and fix them.
  • the components used for connection have a high weight due to the materials used for their production.
  • a leaf spring which is in particular a leaf spring for a suspension.
  • the leaf spring is made of a fiber composite material.
  • the starting point is a semi-finished product consisting of layered prepreg strips.
  • prepregs single resin impregnated fiber fabric layers are referred to, which are manufactured according to the desired shape or cut and placed in a mold, which corresponds to the dimensions of the leaf spring.
  • the leaf spring is set under the action of pressure and heat in the mold.
  • To connect the leaf spring to the body retaining elements are mounted on the leaf spring.
  • the object of the present invention to provide a method for producing a leaf spring, which is characterized by a simplified manufacturing and assembly process. Furthermore, the invention has for its object to provide a leaf spring, which is characterized by a reduced weight and a simplified installation.
  • a leaf spring is produced with at least two connection components surrounding the leaf spring in sections, wherein the leaf spring is produced from an endless fiber-reinforced first plastic semifinished product.
  • the leaf spring made of a fiber-plastic composite is known to be characterized by a low weight and a good load capacity.
  • the connection components preferably each comprise two half-shell-shaped elements which, when combined, form the respective connection component encompassing the leaf spring at their respective section. In this case, the respective connection component completely encloses the leaf spring on the respective associated section and serves there to produce a connection to a vehicle body.
  • connection components are produced from a fiber-reinforced second plastic semifinished product, wherein the first semifinished plastic product and the second semifinished plastic product are joined together in a material-locking manner to form a common component.
  • the leaf spring and the connecting components arranged thereon each consist of a fiber-plastic composite.
  • the cohesive joining of the two plastic semi-finished products leads to a one-piece design of the leaf spring and the connection components. This has the advantage of reducing the complexity and cost of manufacturing and assembling such a leaf spring.
  • the use of fiber-plastic composite for the connection components enables a lightweight, sustainable and customizable design of the connection components as required.
  • the layer structure of the second plastic semifinished product, from which the connection components are produced can be adapted to different load cases.
  • an orientation of +/- 45 ° can be layered and, in the case of high tensile and compressive loads, additionally layered with 0 90 ° orientation.
  • the continuous fiber-reinforced first plastic semi-finished product and the second fiber-reinforced plastic semi-finished product can be in the form of prepreg fibers, in the form of dry fibers or as textile semi-finished products (preforms), in particular in the form of preimpregnated fibers.
  • the second plastic semifinished product can be present as a plastic semi-finished product prepared in advance by Resin Transfer Molding (RTM) or Prepreg Compression Molding (PCM).
  • RTM Resin Transfer Molding
  • PCM Prepreg Compression Molding
  • the second plastic semifinished product can be present either as a short-fiber-reinforced plastic semifinished product, for example in the form of bulk molding compound (BMC) or as thermoset injection molding, or as a long-fiber-reinforced plastic semifinished product, which is designed in particular in the form of sheet molding compound (SMC).
  • BMC bulk molding compound
  • SMC sheet molding compound
  • fibers different fiber types can be used for the connection components, such as carbon, glass, etc.
  • first semifinished plastic product and the second semifinished plastic product are produced or the production process used for their production, they can be connected in the production process by hot pressing cohesively together to form a common component.
  • Resin transfer molding or prepreg compression molding can be used as the manufacturing technology for such a manufacturing process.
  • At least one elastomer layer can be integrated into the first semifinished plastic product or the second semifinished plastic product.
  • the integration in one of the plastic semi-finished products has the advantage that a further process step in the manufacturing process of the leaf spring according to the invention can be saved.
  • the insertion and alignment of a vibration damping rubber mat serving in the half-shell-shaped elements of the connection components, as is required in the state during assembly of the leaf spring eliminates.
  • the implementation of the elastomer layer in the connection components is used for vibration damping and translational and rotational offset compensation.
  • the geometry and the wall thickness of the elastomer layer can be adapted to different load cases occurring on the chassis as well as rotational and translational requirements of the offset compensation.
  • the elastomer layer may have on both sides transverse to the leaf spring recesses, the sections after extend inside. Furthermore, the elastomer layer can be provided on both sides, that is, inside and outside, of the attachment components. As a result, impact and splinter protection can be realized.
  • the integration of the at least one elastomer layer can be carried out during the manufacturing step for materially joining the semifinished plastic products.
  • the unvulcanized elastomer layer can be inserted together with the first and the second plastic semi-finished product in a tool.
  • This can be a forming tool which is used as part of the Resin Transfer Molding process.
  • the elastomer layer can be vulcanized. It can be achieved by vulcanization and bonding with the matrix system of the two plastic semi-finished a cohesive connection between the elastomer layer and the first and second plastic semi-finished product.
  • the individual components, leaf spring, elastomer layer and connection components are fixed in their defined position.
  • the complexity and expense of manufacturing the leaf spring can be further reduced.
  • the integration of the at least one elastomer layer during a manufacturing process for producing the second plastic semi-finished product can be carried out.
  • the unvulcanized elastomer layer together with a multilayer layer structure consisting of fiber-reinforced material can be inserted into a tool and connected to one another in a material-locking manner in a preforming process.
  • wide preforms, i. Plastic semi-finished are manufactured, which are then cut to the required for the half-shell-shaped elements of the connection components width.
  • the components to be joined in the manufacturing process by hot pressing together are inserted in a preheated tool. sets. Then this is closed to start the pressing process. Due to the temperature and the pressure in the cavity, the at least one connecting structure begins to equalize and harden the tool-provided contour. In the course of the hot pressing process, the elastomer layer is then vulcanized.
  • At least one functional component can be integrated into the first semifinished plastic product and / or the second semifinished plastic product.
  • the at least one functional component can be inserted into the tool during the production step for the material-locking connection of the first plastic semi-finished product and the second plastic semi-finished product.
  • at least one functional component during the manufacturing process for producing the second plastic semi-finished product can be integrated into this.
  • At least one sensor can be integrated into the first plastic semi-finished product.
  • the leaf spring can be provided with a sensor by which a change in the fiber composite structure of the leaf spring recognizable and / or loads or overloads or overstress can be detected.
  • the sensor can be integrated into the process step for cohesive connection of leaf spring and connection components.
  • the leaf spring By integrating the bearing elements, an additional rotational / tilting movement of the leaf spring about the longitudinal axis of the connection points, which runs parallel to the vehicle longitudinal axis, are made possible.
  • the leaf spring can be installed for any Radfederwege and the application is significantly expanded.
  • connection components To connect the leaf spring to the body, bores are provided in outer straps of the connection components through which connection elements are passed. Annular metal sleeve can be embedded in these holes to reinforce the bolting to the body of the vehicle. The holes can be researcherdornt or punched out during the manufacturing process for the production of the second plastic semi-finished product or subsequently.
  • the bearing elements to be integrated are designed as ball joints.
  • the bearing elements designed as ball joints can be made one or more parts.
  • a ball head with a conical pin is conceivable, wherein the pin has a threaded portion for screwing to the body at its free end.
  • a likewise one-piece embodiment provides a cylindrical rod with a ball section formed thereon. The cylindrical rod is provided at one end with a threaded portion, while the other end is modeled after a screw head.
  • a two-part embodiment of the ball joint provides that in each case a hollow cylindrical sleeve is integrated with a spherical center portion in the outer flaps of the connection component. To screw with the body is through the hollow cylindrical sleeve a
  • a modification of the two-part embodiment of the ball joint provides that the ball joint of a hollow cylindrical sleeve and a separate spherical shell are formed, whereby the production of these components is simplified.
  • An inventively designed leaf spring is particularly part of a suspension of a motor vehicle and is then provided here as a transverse leaf spring for connecting kinematic points of the suspension in order to transmit movements and forces of the chassis.
  • a wheel suspension comprises at least one leaf spring designed according to the invention.
  • Fig. 1 is a schematic view of a suspension with a leaf spring
  • FIG. 2 is a partial view of a leaf spring with a connection component.
  • FIG. 3 shows a schematic sequence of a method for producing the leaf spring from FIG. 2;
  • FIG. 4 shows a schematic sequence of a method for producing connection components for a leaf spring according to FIG. 2;
  • Figures 5a-5c are sectional views of attachment components having different geometries of an elastomer layer disposed therein;
  • connection component 6 shows an isometric view and a corresponding partial sectional view of a connection component with an integrated functional component according to a first embodiment
  • 7 shows an isometric view and a corresponding partial sectional view of a connection component with an integrated functional component according to a second embodiment
  • FIG. 8 shows an isometric view and a corresponding partial sectional view of a connection component with an integrated functional component according to a third embodiment.
  • Fig. 1 is a schematic view of a suspension 100 of a vehicle with a arranged thereon, made of a fiber-reinforced composite material leaf spring 1 is shown.
  • the leaf spring 1 is composed of an endless fiber-plastic composite, in particular carbon fiber reinforced plastic (CFRP) or glass fiber reinforced plastic (GRP) together.
  • CFRP carbon fiber reinforced plastic
  • GRP glass fiber reinforced plastic
  • the leaf spring 1 is connected to two connection points 2 with a - not shown here - body of the vehicle.
  • connection component 3 which in each case comprises two half-shell-shaped elements 3a, 3b.
  • connection component 3 which in each case comprises two half-shell-shaped elements 3a, 3b.
  • the connection components 3 are made of a fiber-reinforced composite material.
  • elastomer layer 4 is provided between the respective connection component 3 and the leaf spring 1. The at least one elastomer layer 4 is used for vibration damping, the offset compensation of the leaf spring 1 and the fixation of the leaf spring 1 in the connection points 2.
  • the leaf spring 1 also a - not shown here - be embedded with sensor technology.
  • the half-shell-shaped elements 3a and 3b of the connection components 3 have lug-shaped fastening sections 15 on both sides, in which holes 16 are provided, which later connect to the bodywork serve by screwing.
  • the tab-shaped attachment portions 15 of the shell-shaped elements 3a and 3b of the respective attachment component 3 are aligned opposite each other, so that the holes 16 are aligned.
  • FIG. 3 schematically shows a method for producing the leaf spring 1 with the connection components 3 arranged thereon according to FIG. 2.
  • the manufacture of the leaf spring 1 takes place by the resin molding transfer process.
  • a first plastic semi-finished product 5 for the leaf spring 1 and a second plastic semi-finished product 6 for the connection component 3 are prepared in advance.
  • denoted by reference numeral 7 is a prepared semifinished product, which is the at least one elastomer layer 4 in the unvulcanized state, and by reference numerals 8 and 18 in the leaf spring 1 to be integrated functional components, which in the illustrated embodiment as sensors 9 and as bearing elements 20 are formed.
  • the first plastic semifinished product 5 and the second semifinished plastic product 6 are present as continuous fiber-reinforced plastic semi-finished products in the form of dry fibers or as textile semifinished products (preforms).
  • the plastic semi-finished products 5 and 6 are then positioned in a tool 10 together with the semi-finished products 7 and the functional components 8 to each other, although the plastic semi-finished 5 and 6 while pre-formed but not yet impregnated or cured.
  • the insertion of the components into the tool 10 should take place close to the prefabrication of the plastic semi-finished products 5 and 6 in order to avoid contamination.
  • the reheated tool 10 is closed and the Resin Transfer Molding process started.
  • resin is injected into the tool 10 to impregnate the plastic semi-finished products 5 and 6.
  • a hot pressing process is started.
  • the plastic semifinished products 5 and 6 due to the temperature and the pressure in the cavity, begin to conform to the tool-defined contour and harden.
  • the semi-finished product 7 adapts to the tool-provided contour and is vulcanized.
  • the at least one functional component 8, such as the sensors 9 as the bearing elements 20, embedded can be removed as a one-piece component.
  • the second semifinished plastic products 6 to be provided in preparation for the manufacturing process consist, as already stated, of an endless fiber-plastic composite, preferably of fiberglass or CFRP.
  • Starting point for the second semifinished plastic products 6 form dry continuous fiber structures, which are stacked to form a layer structure.
  • the orientation of the continuous fibers per layer 11 is thereby adapted to the later expected load.
  • the individual layers 11 may have the same fiber orientation or different fiber orientations of the layers 11 stacked one above the other are selected.
  • at high torsional stresses can be increasingly piled up in +/- 45 ° orientation.
  • additional 0 ° or 90 ° orientations of the individual layers 11 can be provided.
  • the semi-finished product 7 is cut.
  • a first method step 12 the layers 11 are cut from which the second plastic semifinished product 6 consists. Subsequently, the cut layers 11 are inserted into a tool 13 and subjected to a shaping and fixing in a second method step 14. Subsequently, the second plastic semi-finished product 6 is removed from the tool 13.
  • holes 16 can be introduced into the second plastic semi-finished product 6.
  • this manufacturing process allows the introduction of metallic sleeves in the plastic semi-finished product 7 to reinforce the holes 16, the inclusion of means for attachment to the body of the Serve vehicle.
  • the holes 15 can also be previously drilled or punched out later.
  • a modification of the method for producing the second plastic semifinished product 6 provides that the non-vulcanized semifinished product 7 is subjected together with the dry layers 11 and preforms to the preform manufacturing process described above, wherein the semifinished product 7 is vulcanized during the second method step 14, so that the elastomer layer 4 is formed. Subsequent to this manufacturing process, the production of the leaf spring 1 by the above-described Resin Molding Transfer process, in a modification of which already provided with the elastomer layer 4 second semi-finished plastic 6 is inserted together with the plastic semi-finished product 5 in the tool 10 and molded with resin is then to connect them by hot pressing materially together.
  • the at least one elastomer layer 4 is integrated, this requires no additional manufacturing process.
  • the geometry and wall thickness of the vibration damping and the rotational and translational offset compensation serving at least one elastomer layer 4 can be adapted to different load cases and requirements. Thus, depending on the requirements of the entire layer structure of the second plastic semi-finished product 6 and the elastomer layer 4 vary.
  • at least one layer of plastic semifinished product 7 can be embedded between two layers of the semifinished product 7 or at least one layer of semifinished product 7 can be enclosed between two layers of plastic semifinished product 6.
  • the arrangement of the layers of plastic semi-finished product 6 and semifinished product 7 takes place during insertion into the tool 10th
  • FIGS. 5a to 5c show a sectional view of the connection components 3 for illustrating the variations of geometry and wall thickness. strengthen the integrated elastomer layer 4 in order to realize different behavior in the vibration damping and the rotational and translational offset compensation.
  • the elastomer layer 4 shown in FIG. 5a has a cuboid cross section with a constant wall thickness.
  • the illustrations in FIGS. 5b and 5c each show an elastomer layer 4 with a greater wall thickness.
  • the geometry deviates from the elastomer layer 4 to the effect that on the outer sides of the elastomer layer 4 recesses 17 are provided, for example, have an approximately arcuate or trapezoidal course.
  • FIG. 6 shows an isometric view and a corresponding partial sectional view of the connection component 3 with functional components 18 integrated therein according to a first embodiment.
  • the leaf spring 1 and the attachment components 3 are manufactured according to the method described above.
  • the integration of the functional components 18 takes place in accordance with the introduction of the sensors 9 together with the insertion of the first and second plastic semi-finished products 5 and 6 in the tool 10.
  • the functional components 18 serve to connect the leaf spring 1 at the connection points 2 to a body 19 of the illustrated only hinted vehicle.
  • the respective functional component 18 is a bearing element 20, which is designed as a one-piece ball joint.
  • the bearing member 20 comprises a hollow cylindrical sleeve 21 having a central spherical shaped portion 22.
  • the spherical portion 22 is integrated between the mounting portions 15 of the connection component 3 in this.
  • a connecting element 23 having a threaded portion extends through the sleeve 21 in order to screw the leaf spring 1 to the body 19 at its connection point 2.
  • the functional component 18 can also be designed in several parts by the hollow cylindrical sleeve 21 and the ball portion 22 are made as separate parts, which are integrated in the production of the leaf spring 1 in the connection components 3.
  • the respective functional component 18 according to the second embodiment forms a bearing element 20, which is also designed as a one-piece ball joint.
  • the bearing element 20 is formed as a made of the solid rod 24 with a central ball portion 25 and an end formed in the rod 24 threaded portion 26. Through the threaded portion 26, the bearing element 20 with the body 19 in Anbin- point 2 strigrobbar. At the opposite end of the rod 24 is a head portion 27 with which a tool force or form-fitting is engageable.
  • the bearing element 20 serves in this embodiment as a bearing and connecting element.
  • FIG. 8 shows an isometric view and a corresponding partial sectional view of the connection component 3 with integrated functional components 18 according to a third embodiment.
  • the respective functional component 18 according to the third embodiment forms a bearing element 20, which also has the functionality of a ball and socket joint.
  • the integrally formed bearing element 20 comprises a spherical head portion 28, to which a pin-shaped portion 29 connects. End side of the pin-shaped portion 29 is provided with a threaded portion 30.
  • a profiled recess 31 is incorporated, in which a tool can engage positively.
  • a resilient leaf spring with connection components made of a fiber-plastic composite can be realized, which is characterized by a reduced weight and a significantly simplified production.
  • the simultaneous assembly of the leaf spring 1, the Anitatiskomponenten3, the elastomer layers 4 and additional functional components 8, 18, in particular the bearing elements 20, to a common component in a single joint manufacturing step complexity and effort in the manufacture and assembly of the leaf spring 1 according to the invention are reduced.

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

Abstract

La présente invention concerne un procédé de réalisation d'un ressort à lames (1), notamment d'un ressort à lames destiné à une suspension de roue, comprenant au moins deux éléments de liaison (3) qui entourent le ressort à lames (1) au moins par sections, le ressort à lames (1) étant réalisé à partir d'un premier produit semi-fini en matière plastique (5) renforcé par fibres continues. Pour permettre l'obtention d'un ressort à lames (1) caractérisé par un processus de réalisation et de montage simple, les éléments de liaison (3) sont réalisés à partir d'un second produit semi-fini en matière plastique (6) renforcé par fibres, et le premier produit semi-fini en matière plastique (5) et le second produit semi-fini en matière plastique (6) sont reliés par liaison de matière pour former un composant commun au cours d'une étape de fabrication.
PCT/EP2018/052596 2017-03-03 2018-02-02 Procédé de réalisation d'un ressort à lames, ressort à lames et suspension de roue Ceased WO2018158031A1 (fr)

Applications Claiming Priority (2)

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DE102017203537.4 2017-03-03
DE102017203537.4A DE102017203537B3 (de) 2017-03-03 2017-03-03 Verfahren zur Herstellung einer Blattfeder, sowie Blattfeder und Radaufhängung

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WO2018158031A1 true WO2018158031A1 (fr) 2018-09-07

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WO (1) WO2018158031A1 (fr)

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DE102019216941B4 (de) 2019-11-04 2022-08-04 Zf Friedrichshafen Ag Verfahren zur stoffschlüssigen Verbindung eines Gummilagers mit einem faserverstärkten Bauteil
DE102020128606A1 (de) 2020-10-30 2022-05-05 Bayerische Motoren Werke Aktiengesellschaft Vorrichtung zum Lagern einer radführenden Querblattfeder eines Fahrzeuges

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115696A2 (fr) * 1983-01-05 1984-08-15 Ford Motor Company Limited Dispositif de fixation sur l'essieu pour ressorts à lames en matière synthétique renforcée de fibres
JPH06246774A (ja) * 1992-12-28 1994-09-06 Nhk Spring Co Ltd 端部に端部部品を有する部材とその製造方法
JPH09112615A (ja) * 1995-10-19 1997-05-02 Mitsubishi Steel Mfg Co Ltd Ｆｒｐ板ばね
WO1998046902A1 (fr) * 1997-04-17 1998-10-22 Ohio Mattress Company Licensing And Components Group Modules ressort en materiau composite avec fixations monobloc
DE102010009528A1 (de) 2010-02-26 2011-09-01 Ifc Composite Gmbh Blattfeder aus einem Faserverbundwerkstoff mit integrierten Lageraugen und Verfahren zur Herstellung derselben

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969633A (en) 1983-10-19 1990-11-13 A. O. Smith Corporation Molded fiber reinforced plastic leaf spring
CA1235155A (fr) 1984-03-02 1988-04-12 Herbert Woltron Production d'une lame de ressort en matiere plastique, et ressort faite d'un assemblage desdites lames

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0115696A2 (fr) * 1983-01-05 1984-08-15 Ford Motor Company Limited Dispositif de fixation sur l'essieu pour ressorts à lames en matière synthétique renforcée de fibres
JPH06246774A (ja) * 1992-12-28 1994-09-06 Nhk Spring Co Ltd 端部に端部部品を有する部材とその製造方法
JPH09112615A (ja) * 1995-10-19 1997-05-02 Mitsubishi Steel Mfg Co Ltd Ｆｒｐ板ばね
WO1998046902A1 (fr) * 1997-04-17 1998-10-22 Ohio Mattress Company Licensing And Components Group Modules ressort en materiau composite avec fixations monobloc
DE102010009528A1 (de) 2010-02-26 2011-09-01 Ifc Composite Gmbh Blattfeder aus einem Faserverbundwerkstoff mit integrierten Lageraugen und Verfahren zur Herstellung derselben

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