EP1948959A1 - Segmentierte faserverbund-blattfeder und verfahren zur herstellung derselben - Google Patents
Segmentierte faserverbund-blattfeder und verfahren zur herstellung derselbenInfo
- Publication number
- EP1948959A1 EP1948959A1 EP06818045A EP06818045A EP1948959A1 EP 1948959 A1 EP1948959 A1 EP 1948959A1 EP 06818045 A EP06818045 A EP 06818045A EP 06818045 A EP06818045 A EP 06818045A EP 1948959 A1 EP1948959 A1 EP 1948959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- leaf spring
- segments
- fiber composite
- legs
- raw
- 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- Withdrawn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
-
- 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
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/435—Making large sheets by joining smaller ones or strips together
-
- 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
- B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
- B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap 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
Definitions
- the invention relates to a leaf spring made of a fiber composite material according to the preamble of patent claim 1 and two methods for producing the same according to claims 9 and 10.
- Leaf springs are commonly used for suspensions on a vehicle to cushion it against uneven terrain conditions.
- Such vehicles may in particular be passenger cars, trucks and other commercial vehicles, but also rail vehicles and the like.
- Leaf springs made of steel have been known for a long time. In these individual, narrow steel sheets are superimposed with decreasing lengths to achieve a variable spring constant with increasing load. By clamping and / or screw the plates of the leaf springs are connected to form a package. When mounting a leaf spring in a motor vehicle, for example, this takes place transversely to the direction of travel, wherein the central region thereof is fixed to the vehicle body, while the two axial ends of the leaf spring in the region of the suspension of the right and left vehicle wheel are arranged.
- a metallic leaf spring is comparatively inexpensive to manufacture and reliable in operation, but such is disadvantageously difficult, which contributes to a relatively high vehicle weight and thus ultimately causes increased fuel consumption.
- leaf springs made of fiber composite materials, which are formed, for example, impregnated with synthetic resin glass or carbon fibers and have the same size and comparable spring properties considerably less weight than steel leaf springs.
- fiber composite sheet For example, springs are made of individual resin-impregnated fiber layers known as "prepreg.” These prepregs are manufactured and / or cut to the desired shape and placed on top of one another in a mold that corresponds to the dimensions of the leaf spring.
- Prepreg resin-impregnated fiber layers
- a leaf spring made of a fiber composite material which consists of a central arc section and ends of peripheral sections in one piece.
- the peripheral portions have at their respective axial end an eyelet with an opening for receiving a bolt for the purpose of securing the leaf spring to the vehicle chassis.
- the disadvantage here is the introduction of the attachment eye in the leaf spring, which can only be realized by a structurally complex mold or by a severing the fibers punching process.
- the end portions are chamfered.
- the respective end section is cut to size after curing of the leaf spring of the bevelled shape. This has the consequence that also the fibers of the material are cut.
- the interfaces often lead to cracks, which emanate from the interfaces and extend substantially parallel to the longitudinal extent of the fibers at permanent alternating loads of the leaf spring. These cracks in turn can lead to breakage of the leaf spring.
- a leaf spring made of a fiber composite material which is narrower and thicker at its axial ends than in a central, rectangular section.
- the region of the axial ends of the leaf spring can be approximately trapezoidal in plan view.
- the area of right-angled cross-sections of the leaf spring from one spring end to the other The end can be constant according to another variant.
- the composite fibers are uncut from one axial end to the other.
- the geometry of the leaf spring is produced during its manufacture by compression molding.
- a leaf spring made of a fiber composite material with a central longitudinal portion and axial ends for a suspension on a vehicle in which the axial ends are formed with respect to the leaf spring width is tapered, and in the axially aligned Fibers of the fiber composite material are fed uncut to the end edge of the leaf spring.
- the leaf spring can be reinforced in its central region by geometrically simple, rectangular fiber layers in terms of their component thickness, while being used to form the V-shaped axial ends of the leaf spring appropriately trained and guided over the entire component length fiber layers.
- a leaf spring according to DE 10 2004 010 768 A1 has several advantages, since it can have substantially constant cross-sectional areas over almost its entire length as well as a substantially constant thickness with a reduced width at the axial end without being trimmed at its axial ends got to.
- the invention is based on the object, a known from DE 10 2004 010 768 A1 leaf spring in such a way that it can be produced as inexpensively as possible with optimum product quality.
- the invention is based on the finding that a fiber composite leaf spring can be produced inexpensively comparatively easily and in different ways by using largely identical sections of a continuously produced fiber composite material web.
- the invention according to the features of claim 1 is based on a leaf spring made of a fiber composite material having a central longitudinal portion and two adjoining axial end portions for a suspension on a vehicle, wherein the end portions are tapered with respect to the leaf spring width, wherein the leaf spring resin-impregnated unidirectional fiber is constructed, which extend axially unabridged between the axial ends of the leaf spring, and in which the axial end portions before completion of the green leaf spring have a substantially V-shaped incision or a substantially V-shaped end geometry and thus axially each form two legs formed transversely to the longitudinal extent of the raw leaf spring, these legs are close to each other in the finished leaf spring.
- the leaf spring is composed of individual, largely identically formed elongated segments, which are manufactured separately as a fiber composite body and assembled before the curing of the leaf spring.
- Such a leaf spring can also be characterized in that the said segments are formed as prepregs, which are cut out of a continuously produced material web by two cuts with different, but oblique angles of intersection and placed to form the raw leaf spring, each with one of their longitudinal sides together ,
- a leaf spring designed according to the invention it is preferably provided that two segments cut off from the material web are placed against each other with one of their respective longitudinal sides such that the first segment forms the right half and the second segment the left half of the leaf spring in plan view , or the other way around.
- the short longitudinal sides of the segments are placed against one another to form the leaf spring.
- the two cutting angles are selected so that the opening angle of the substantially V-shaped end geometry of the green leaf spring is identical to twice the cutting angle ⁇ when cutting off the segments from the material web.
- the segments have substantially the thickness of the leaf spring perpendicular to their width B1 and L1 length, or that a plurality of segments superimposed form the thickness of the leaf spring.
- a second variant of a leaf spring designed according to the invention is characterized in that other segments are used for its construction, which are provided with a substantially rectangular section from a material web are cut off and transverse to their length L have a width B which is smaller than the thickness D of these other segments, and that these other segments are laid together to form the green leaf spring with their opposite larger-area longitudinal sides.
- the leaf spring according to the second variant is constructed in such a way that the segments placed against each other with their opposite, larger-area longitudinal sides have different axial lengths L.
- the invention also relates in each case to a method for producing a leaf spring according to the two variants presented briefly.
- the method for producing the leaf spring according to the first variant comprises the following method steps:
- the second method comprises the method steps: - Cutting other, geometrically largely identical segments of a web of a fiber composite material with a substantially rectangular angle of intersection.
- FIG. 1 is a schematic plan view of fiber layers in a raw leaf spring according to the invention during their production
- FIG. 2 is a leaf spring according to FIG. 1 after their production
- FIG. 3 is a schematic representation of a fiber composite material web
- Fig. 4 two of the Material web according to FIG. 3 cut and separated segments
- Fig. 5 is a raw leaf spring, which from the two segments according to
- Fig. 4 is constructed, and
- Fig. 6 is a schematic cross-section AA through a raw leaf spring of FIG. 1 during its manufacture, which is constructed of longitudinally juxtaposed segments.
- a leaf spring 1 according to the invention is made in a mold in a conventional manner using pressure and heat from a plurality of resin impregnated and superimposed unidirectional fibers, for example of glass, carbon or aramid.
- a crude leaf spring 2 shown schematically in Fig. 1 is first constructed, which has a substantially rod-shaped circumferential geometry and has a central portion 3, followed by the axial end portions 10 and 11.
- the end sections 10, 11 have an approximately V-shaped notch or a V-shaped end geometry 7, so that in each case two legs 8, 9 are formed on the end side of the raw leaf spring 2.
- These legs 8, 9 are joined to each other before the setting of the green leaf spring 2 such that a finished leaf spring 1 according to FIG. 2 has pointed or substantially rounded axial ends 4, 5.
- a leaf spring 1, 2 is first produced by cutting and joining individual sections or segments 13, 14, 15 from a continuously produced fiber composite material web 16, which is formed from a prepreg material is.
- the prepreg material here consists of unidirectional fibers 23 impregnated with synthetic resin 24.
- the segments 13, 14, 15 are cut off from the material web 16 by cuts 17 and 17 'at a predetermined oblique angle ⁇ and ⁇ , respectively, so that these segments 13, 14, 15 each have an in plan view Have substantially diamond-shaped circumferential geometry, each having a long longitudinal side and a comparatively short longitudinal side 18, 19.
- the width B1 of the segments is small to the length L1 thereof.
- FIG. 6 shows an enlarged schematic cross-section AA according to FIG. 1 by a raw leaf spring 2, which is constructed from segments 6 which are also preferably formed as prepregs, which, however, at least extend from the already described segments 13, 14, 15 distinguished in terms of their geometry.
- these other segments 6 have only comparatively few unidirectional fibers 23 in terms of their width B, which are embedded in synthetic resin 24.
- the length L is preferably much larger and the thickness D is greater than the said width B of these segments 6.
- a raw leaf spring 2 according to the second variant is constructed by means of these other segments 6 in that substantially the following method steps are maintained:
- the segments 6 to form the green leaf spring 2 with their large-scale longitudinal sides 20, 21 and vertically, for example in a form to be superimposed.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- General Engineering & Computer Science (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005055050A DE102005055050B4 (de) | 2005-11-16 | 2005-11-16 | Segmentierte Faserverbund-Blattfeder und Verfahren zur Herstellung derselben |
PCT/DE2006/001941 WO2007056973A1 (de) | 2005-11-16 | 2006-11-04 | Segmentierte faserverbund-blattfeder und verfahren zur herstellung derselben |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1948959A1 true EP1948959A1 (de) | 2008-07-30 |
Family
ID=37895891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06818045A Withdrawn EP1948959A1 (de) | 2005-11-16 | 2006-11-04 | Segmentierte faserverbund-blattfeder und verfahren zur herstellung derselben |
Country Status (6)
Country | Link |
---|---|
US (1) | US20090256296A1 (de) |
EP (1) | EP1948959A1 (de) |
JP (1) | JP2009516137A (de) |
CN (1) | CN101305202A (de) |
DE (2) | DE102005055050B4 (de) |
WO (1) | WO2007056973A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102005054376A1 (de) * | 2005-11-12 | 2007-05-24 | Ifc Composite Gmbh | Blattfeder aus einem Faserverbundwerkstoff |
ES2443916T3 (es) | 2007-10-09 | 2014-02-21 | Saab Ab | Procedimiento para fabricar vigas de material compuesto reforzado con fibras |
GB2482343A (en) * | 2010-07-30 | 2012-02-01 | Vestas Wind Sys As | Compacting an edge region of a fibrous sheet for a composite structure |
DE102010009528B4 (de) | 2010-02-26 | 2015-04-30 | Ifc Composite Gmbh | Blattfeder aus einem Faserverbundwerkstoff mit integrierten Lageraugen und Verfahren zur Herstellung derselben |
GB201103682D0 (en) * | 2011-03-04 | 2011-04-20 | Rolls Royce Plc | A turbomachine casing assembly |
CN102537165B (zh) * | 2012-03-06 | 2014-03-26 | 株洲时代新材料科技股份有限公司 | 一种纤维复合材料板式弹簧及其制造工艺 |
DE102012016934B4 (de) * | 2012-08-27 | 2015-12-03 | Ifc Composite Gmbh | Verfahren zur gleichzeitigen Herstellung von mehreren Blattfedern aus einem Faserverbundwerkstoff |
CN102785372B (zh) * | 2012-09-04 | 2015-04-22 | 株洲时代新材料科技股份有限公司 | 一种纤维增强塑料板式弹簧的制造方法 |
US20140191486A1 (en) | 2013-01-10 | 2014-07-10 | Hendrickson Usa, L.L.C. | Multi-tapered suspension component |
DE102014102330A1 (de) * | 2014-02-24 | 2015-08-27 | ThyssenKrupp Federn und Stabilisatoren GmbH | Tragfedereinheit für ein Fahrzeugfahrwerk |
CN105508483A (zh) * | 2015-10-23 | 2016-04-20 | 精功(绍兴)复合材料技术研发有限公司 | 一种车用板簧 |
CN107263974B (zh) * | 2017-06-29 | 2019-05-14 | 太仓市惠得利弹簧有限公司 | 一种纤维增强多层结构板簧 |
DE102017215403B4 (de) | 2017-09-04 | 2022-05-19 | Ford Global Technologies, Llc | Federbaugruppe |
CN108544768A (zh) * | 2018-05-11 | 2018-09-18 | 奇瑞汽车股份有限公司 | 汽车悬架横臂的制造方法 |
CN113478868B (zh) * | 2021-05-25 | 2023-05-05 | 贵州石鑫玄武岩科技有限公司 | 一种层切式复合材料板簧生产装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3900357A (en) * | 1970-05-04 | 1975-08-19 | Edgewater Corp | Composite material springs and manufacture |
DE3119856C2 (de) * | 1981-05-19 | 1986-08-28 | Messerschmitt-Bölkow-Blohm GmbH, 8000 München | Biegefeder aus Faserverbundwerkstoff |
FR2516455B1 (fr) * | 1981-11-18 | 1986-12-12 | Bertin & Cie | Suspension de vehicule automobile par lame elastique |
US4530490A (en) * | 1982-08-20 | 1985-07-23 | Nhk Spring Co., Ltd. | Fiber-reinforced plastics leaf spring |
JPS5954833A (ja) * | 1982-09-22 | 1984-03-29 | Nissan Motor Co Ltd | 板ばねの製造方法 |
US4688778A (en) * | 1982-10-01 | 1987-08-25 | Isosport Verbundbauteile Ges.M.B.H. | Plastic leaf spring |
US4560525A (en) * | 1983-10-19 | 1985-12-24 | A. O. Smith Corporation | Method of making a molded fiber reinforced plastic leaf spring |
US5244189A (en) * | 1991-03-11 | 1993-09-14 | Eaton Corporation | Vehicle leaf spring with a longitudinal discontinuity for crack propagation |
US5425829A (en) * | 1991-06-10 | 1995-06-20 | General Motors Corporation | Method of manufacturing hybrid composite leaf springs |
US6811169B2 (en) * | 2001-04-23 | 2004-11-02 | Daimlerchrysler Corporation | Composite spring design that also performs the lower control arm function for a conventional or active suspension system |
US20030122293A1 (en) * | 2001-12-27 | 2003-07-03 | Visteon Global Technologies, Inc. | Variable rate multi-arc composite leaf spring assembly |
DE102004010768B4 (de) * | 2004-03-05 | 2006-07-27 | Ifc Composite Gmbh | Blattfeder für eine Radaufhängung an einem Fahrzeug |
DE102005054335A1 (de) * | 2005-11-11 | 2007-05-24 | Ifc Composite Gmbh | Blattfeder mit im Querschnitt konvexer Ober- und Unterseite |
-
2005
- 2005-11-16 DE DE102005055050A patent/DE102005055050B4/de active Active
-
2006
- 2006-11-04 DE DE112006003687T patent/DE112006003687A5/de not_active Withdrawn
- 2006-11-04 US US12/094,148 patent/US20090256296A1/en not_active Abandoned
- 2006-11-04 WO PCT/DE2006/001941 patent/WO2007056973A1/de active Application Filing
- 2006-11-04 JP JP2008540445A patent/JP2009516137A/ja active Pending
- 2006-11-04 CN CNA2006800422717A patent/CN101305202A/zh active Pending
- 2006-11-04 EP EP06818045A patent/EP1948959A1/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2007056973A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2009516137A (ja) | 2009-04-16 |
CN101305202A (zh) | 2008-11-12 |
DE102005055050B4 (de) | 2007-09-27 |
US20090256296A1 (en) | 2009-10-15 |
DE102005055050A1 (de) | 2007-05-24 |
WO2007056973A1 (de) | 2007-05-24 |
DE112006003687A5 (de) | 2008-10-23 |
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