WO2011142315A1 - 繊維強化プラスチック製ばね - Google Patents
繊維強化プラスチック製ばね Download PDFInfo
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- WO2011142315A1 WO2011142315A1 PCT/JP2011/060651 JP2011060651W WO2011142315A1 WO 2011142315 A1 WO2011142315 A1 WO 2011142315A1 JP 2011060651 W JP2011060651 W JP 2011060651W WO 2011142315 A1 WO2011142315 A1 WO 2011142315A1
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- spring
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- elastic modulus
- tensile elastic
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers being fibrous or filamentary
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/02—Composition of the impregnated, bonded or embedded layer
- B32B2260/021—Fibrous or filamentary layer
- B32B2260/023—Two or more layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
- B32B2260/04—Impregnation, embedding, or binder material
- B32B2260/046—Synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
- B32B2262/0269—Aromatic polyamide fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2605/00—Vehicles
-
- 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
-
- 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
- the present invention relates to a fiber reinforced plastic spring to which a single swing bending load is applied, and particularly to a technique for preventing breakage due to compressive stress.
- unidirectional springs spiral springs, mainsprings, leaf springs, etc.
- these springs are required to be light and space-saving.
- FRP spring fiber reinforced plastic spring
- Patent Document 1 discloses an FRP tapered leaf spring as an FRP spring.
- a plurality of sheets having different lengths are impregnated with glass fiber or carbon fiber, and the sheets are overlapped to form a tapered leaf.
- Manufactures springs discloses.
- Patent Document 2 discloses an FRP leaf spring as an FRP spring, and in that technology, the leaf center portion is made of carbon fiber, and the leaf surface portion is made of glass fiber, thereby having flexibility. Propose to manufacture leaf springs.
- an object of the present invention is to provide a fiber-reinforced plastic spring that can prevent breakage due to compressive stress.
- the fiber reinforced plastic spring (hereinafter referred to as FRP spring) of the present invention is a fiber reinforced plastic spring to which a swinging bending load is applied, and has a laminated structure in which a plurality of fibers having different tensile elastic moduli are laminated.
- the tensile elastic modulus distribution of the laminated structure is asymmetric with respect to the neutral axis.
- the tensile modulus in the present invention is calculated using the following relational expression using the first straight line part (the straight line part passing through the origin or the tangent line at the origin of the curve) in the tensile stress-strain curve obtained in the tensile test.
- E m ⁇ / ⁇
- E m is the tensile modulus (unit: N / mm 2 )
- ⁇ is the stress difference (unit: N / mm 2 ) due to the average original cross-sectional area between two linear points
- ⁇ is the strain between the two points. Is the difference.
- the tensile elastic modulus distribution of the laminated structure is set to be asymmetric with respect to the neutral axis, the tension of one surface layer portion of both surface layer portions parallel to the neutral axis is determined.
- the elastic modulus is smaller than that of the other surface layer portion.
- the fiber on the surface layer side has a small tensile elastic modulus and is easily bent. Therefore, breakage such as breakage due to buckling is unlikely to occur on the compressive stress side surface. Therefore, since the breaking stress of the whole spring can be increased, a spring made of a metal material such as spring steel, a single-layer FRP spring, and an FRP spring having a tensile elastic modulus distribution symmetrical to the neutral axis In comparison, the available energy density can be increased.
- the FRP spring of the present invention can use various configurations. For example, for an asymmetric tensile elastic modulus distribution, the tensile elastic modulus of the surface layer portion of the compressive stress generation region is minimum, and the tensile elastic modulus of the surface layer portion of the tensile stress generation region is smaller than the tensile elastic modulus of the neutral shaft portion.
- the tensile elastic modulus can effectively correspond to the stress distribution in the FRP spring at the time of the one-way bending load, so that the breaking stress of the entire spring can be further increased, and as a result.
- the available energy density can be further increased.
- the FRP spring of the present invention since the breaking stress of the whole spring increases, the spring made of a metal material such as spring steel, a single-layer FRP spring, and a tensile elastic modulus distribution symmetrical to the neutral axis Compared to the FRP spring, the available energy density can be increased.
- the structure of the fiber-reinforced plastic spring which concerns on one Embodiment of this invention is represented, (A) is a perspective view, (B) is a side view. 2 shows a partial configuration of a laminated structure of fiber-reinforced plastic springs, (A) is a three-layer structure, and (B) is a side sectional view of a five-layer structure.
- SYMBOLS 1 FRP spring (fiber reinforced plastic spring), 20, 30 ... Laminated structure, 21, 31 ... First layer (surface layer part of tensile stress generation region), 22 ... Second layer (neutral shaft part), 33 ... First 3 layers (neutral shaft portion), 23 ... third layer (surface layer portion of compressive stress generation region), 35 ... fifth layer (surface layer portion of compressive stress generation region), S ... neutral axis
- FIG. 1 shows a configuration of a fiber-reinforced plastic spring 1 (hereinafter referred to as an FRP spring 1) according to an embodiment of the present invention, in which (A) is a perspective view and (B) is a side view.
- 2A and 2B show a partial configuration of the laminated structure of the FRP spring 1.
- FIG. 2A is a side sectional view of a three-layer structure and FIG. 2B is a five-layer structure.
- a symbol S in FIG. 2 is a neutral shaft located at the center of the FRP spring 1 in the thickness direction.
- the upper surface of the FRP spring 1 is a surface to which a one-way bending load (symbol P in FIG. 4) is applied, and the upper region with respect to the neutral axis S of the laminated structure is a compressive stress region where compressive stress is generated.
- the lower region with respect to the neutral axis S is a tensile stress region where tensile stress is generated.
- the FRP spring 1 is a leaf spring having, for example, a leaf portion 11 and an eyeball portion 12.
- the FRP spring 1 has a laminated structure in which a plurality of fibers having different tensile elastic moduli are laminated.
- the tensile elastic modulus distribution of the laminated structure is asymmetric with respect to the neutral axis S.
- the tensile elastic modulus of the surface layer portion in the compressive stress generation region is minimum, and the tensile elastic modulus of the surface layer portion in the tensile stress generation region is It is preferable that it is smaller than the tensile elastic modulus of the vertical shaft portion.
- the laminated structure 20 shown in FIG. 2A is a three-layer structure in which a first layer 21, a second layer 22, and a third layer 23 having different tensile elastic moduli are laminated in order.
- the first layer 21 is a surface layer portion of the tensile stress generation region, and its tensile elastic modulus is smaller than that of the second layer 22.
- the second layer 22 is a neutral shaft portion where the neutral shaft S is located.
- the third layer 23 is a surface layer portion of the compressive stress generation region, and its tensile elastic modulus is the smallest among the layers of the laminated structure 20.
- the tensile elastic modulus of the first layer 21 can be set to 250 GPa
- the tensile elastic modulus of the second layer 22 can be set to 395 GPa
- the tensile elastic modulus of the third layer 23 can be set to 234 GPa.
- a first layer 31, a second layer 32, a third layer 33, a fourth layer 34, and a fifth layer 35 having different tensile elastic moduli are sequentially laminated.
- the laminated structure 30 has a finer tensile modulus distribution than the laminated structure 20, and the tensile elastic modulus changes so as to become smaller and smaller in steps from the neutral shaft portion to the surface layer portion.
- the first layer 31 is a surface layer portion of a tensile stress generation region, and its tensile elastic modulus is smaller than that of the third layer 33.
- the tensile elastic modulus of the second layer 32 is an intermediate value between the tensile elastic modulus of the first layer 31 and the tensile elastic modulus of the third layer 33.
- the third layer 33 is a neutral shaft portion where the neutral shaft S is located.
- the tensile elastic modulus of the fourth layer 34 is an intermediate value between the tensile elastic modulus of the third layer 33 and the tensile elastic modulus of the fifth layer 35.
- the fifth layer 35 is a surface layer portion of the compressive stress generation region, and its tensile elastic modulus is the smallest among the layers of the laminated structure 30.
- the tensile modulus of elasticity is set so as to decrease as it goes from the third layer 33 to the first layer 31 and to decrease as it goes from the third layer 33 to the fifth layer 35.
- the modulus is set to the minimum among the layers of the laminated structure 30, and the tensile elastic modulus distribution more finely corresponds to the stress distribution.
- the fibers constituting each layer are appropriately selected so that the laminated structures 20 and 30 have the tensile elastic modulus distribution as described above.
- the fibers carbon fibers, glass fibers, aramid fibers (Kevlar fibers), boron fibers and other reinforcing fibers can be used.
- the carbon fiber either PAN-based or pitch-based can be used.
- FIG. 3 is a diagram illustrating a schematic configuration of a part of the device 100 used in the method for manufacturing the FRP spring 1.
- the apparatus 100 uses a filament winding method.
- the apparatus 100 includes a mold 101 for winding the roving B supplied from the roving ball 'B by rotation.
- Roving B is a bundle of reinforcing fibers.
- the molding die 101 is formed with a molding groove 101A corresponding to the shape of the FRP spring 1 and the like.
- the molding die 101 is provided with a fixed die 102 so as to face it.
- the roving B is wound around the mold 101 after passing through the resin impregnation tank 103 in which the resin R is accommodated.
- the tensile elastic modulus of the reinforcing fiber constituting the roving B that passes through the resin impregnation tank 103 is changed.
- the tensile elastic modulus of the reinforcing fiber of the roving B that passes through the uppermost resin impregnation tank 103 in the figure is set to the maximum
- the tensile elastic modulus of the reinforcing fiber of the roving B that passes through the lowermost resin impregnation tank 103 is set to The minimum value is set so that the tensile elastic modulus of the reinforcing fibers of the roving B passing through the resin impregnation tank 103 on the upper side in the drawing gradually decreases from the upper resin impregnation tank 103 in the drawing.
- Reference numeral 104 is a tension adjuster that applies an optimum tension to the roving B
- reference numeral 105 is a flow adjuster that squeezes excess resin impregnated in the roving B
- reference numeral 106 is a leaf spring to be molded. This is a forming width adjusting mechanism used when the width is changed along the longitudinal direction.
- the roving B is passed through the resin impregnation tank 103 and the roving B is impregnated with the resin R.
- the FRP spring 1 is obtained by winding the roving B impregnated with the resin R around the molding die 101 and heat-curing and integrally molding the roving B.
- the resin impregnation tank 103 to be used is appropriately switched according to the tensile elastic modulus of each layer of the laminated structures 20 and 30 of the FRP spring 1 to be molded, and the roving B to be wound around the mold 101 is selected.
- the laminated structures 20 and 30 having a desired tensile elastic modulus distribution are obtained.
- the manufacturing method of the FRP spring 1 is not limited to the above method, and various modifications are possible.
- a prepreg obtained by impregnating a reinforcing fiber (for example, carbon fiber) with a resin can be disposed in each layer of the laminated structure of the FRP spring 1.
- a plurality of prepregs used for the laminated structure are produced, and in this case, the tensile elastic modulus of the carbon fiber used for the prepreg is made different for each prepreg.
- Such a prepreg is arranged so that the FRP spring 1 has a desired tensile elastic modulus distribution.
- the resin may be either thermosetting or thermoplastic.
- the tensile elastic modulus distribution of the laminated structures 20 and 30 is set to be asymmetric with respect to the neutral axis S. Therefore, of the surface layer portions on both sides parallel to the neutral axis S.
- the tensile elastic modulus of one surface layer portion (layers 23, 35) is smaller than that of the other surface layer portion (layers 21, 31).
- the layers 23 and 35 which are surface layer portions having a small tensile elastic modulus, are arranged on the surface side where compressive stress is generated when a unidirectional bending load (P in FIG. 4) is applied, the layers 23,
- the fiber 35 has a small tensile elastic modulus and is easy to bend.
- the tensile elastic modulus of the layers 23 and 35 that are the surface layer portions of the compressive stress generation region is the smallest, and the tensile elastic modulus of the layers 21 and 31 that are the surface layer portions of the tensile stress generation region is By setting it to be smaller than that of the layers 22 and 33 that are neutral shaft portions, fibers having different tensile elastic moduli according to the stress distribution in the FRP spring 1 when a bending swing load is applied. Are stacked. Therefore, since the breaking stress of the whole spring 1 can be further increased, the available energy density can be further increased.
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Abstract
Description
Em=Δσ/Δε
なお、Emは引張弾性率(単位:N/mm2)、Δσは直線状の2点間の平均原断面積による応力差(単位:N/mm2)、Δεは上記2点間のひずみの差である。
以下、本発明の実施形態について図面を参照して説明する。図1は、本発明の一実施形態に係る繊維強化プラスチック製ばね1(以下、FRPばね1)の構成を表し、(A)は斜視図、(B)は側面図である。図2(A),(B)は、FRPばね1の積層構造の一部の構成を表し、(A)は3層構造、(B)は5層構造の側断面図である。図2での符号Sは、FRPばね1の厚さ方向の中心に位置する中立軸である。図1,2では、FRPばね1の上面が片振りの曲げ荷重(図4の符号P)が加えられる表面であり、積層構造の中立軸Sに対する上側領域が、圧縮応力が発生する圧縮応力領域であり、中立軸Sに対する下側領域が、引張応力が発生する引張応力領域である。
FRPばね1の製造方法について図3を参照して説明する。図3は、FRPばね1の製造方法に用いられる装置100の一部の概略構成を表す図である。装置100は、フィラメントワインディング法を用いている。装置100は、ロービング玉‘Bから供給されるロービングBを回転により巻き付ける成形型101を備えている。ロービングBは強化繊維の束である。成形型101には、FRPばね1の形状等に対応する成形溝101Aが形成されている。成形型101には、それに対向して固定型102が設けられている。ロービングBは、樹脂Rが収容されている樹脂含浸槽103を通過した後、成形型101に巻き付けられる。
Claims (3)
- 片振りの曲げ荷重が加えられる繊維強化プラスチック製ばねにおいて、
引張弾性率が異なる複数の繊維が積層された積層構造を有し、
前記積層構造の引張弾性率分布は、中立軸に対して非対称であることを特徴とする繊維強化プラスチック製ばね。 - 圧縮応力発生領域の表層部の引張弾性率が最小であり、
引張応力発生領域の表層部の引張弾性率が、中立軸部の引張弾性率よりも小さいことを特徴とする請求項1に記載の繊維強化プラスチック製ばね。 - 前記引張弾性率分布では、前記引張弾性率が前記中立軸から表面に向けて段階的に小さくなるように変化していることを特徴とする請求項1または2に記載の繊維強化プラスチック製ばね。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/696,331 US8864117B2 (en) | 2010-05-14 | 2011-05-09 | Fiber-reinforced plastic spring |
CN201180023996.2A CN102884337B (zh) | 2010-05-14 | 2011-05-09 | 纤维强化塑料制弹簧 |
EP11780572.1A EP2570694B1 (en) | 2010-05-14 | 2011-05-09 | Fiber-reinforced plastic spring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2010-111675 | 2010-05-14 | ||
JP2010111675A JP5548516B2 (ja) | 2010-05-14 | 2010-05-14 | 繊維強化プラスチック製ばね |
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WO2011142315A1 true WO2011142315A1 (ja) | 2011-11-17 |
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PCT/JP2011/060651 WO2011142315A1 (ja) | 2010-05-14 | 2011-05-09 | 繊維強化プラスチック製ばね |
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US (1) | US8864117B2 (ja) |
EP (1) | EP2570694B1 (ja) |
JP (1) | JP5548516B2 (ja) |
CN (1) | CN102884337B (ja) |
WO (1) | WO2011142315A1 (ja) |
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DE102013107889A1 (de) | 2013-07-23 | 2015-01-29 | Muhr Und Bender Kg | Blattfederanordnung für Kraftfahrzeuge |
US9889633B2 (en) | 2014-04-10 | 2018-02-13 | Honda Motor Co., Ltd. | Attachment method for laminate structures |
DE102014211096A1 (de) * | 2014-06-11 | 2015-12-17 | Thyssenkrupp Ag | Torsionsbelastetes stabförmiges Bauteil mit unterschiedlichen Faserverstärkungen für Zug- und Druckbelastung |
EP3343058A4 (en) * | 2015-08-26 | 2019-05-01 | NHK Spring Co., Ltd. | WIRE MATERIAL FOR ELASTIC ELEMENT AND ELASTIC ELEMENT |
DE102015122621A1 (de) * | 2015-12-22 | 2017-06-22 | Karlsruher Institut für Technologie | Verfahren zur Einstellung der Elastizität eines Werkstoffs und mit diesem Verfahren hergestelltes Werkstück |
FR3054487B1 (fr) * | 2016-07-28 | 2018-09-07 | Iguana Yachts | Vehicule amphibie monte sur chenilles |
CN108058558B (zh) * | 2016-11-05 | 2019-08-06 | 刘守银 | 纵置frp板簧本体及其总成结构 |
CN108501646A (zh) * | 2017-02-27 | 2018-09-07 | 江苏风速电动车有限公司 | 一种汽车复合悬架系统 |
CN114905768A (zh) * | 2022-06-02 | 2022-08-16 | 贵州翰凯斯智能技术有限公司 | 一种汽车板簧的加工方法 |
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- 2011-05-09 US US13/696,331 patent/US8864117B2/en active Active
- 2011-05-09 WO PCT/JP2011/060651 patent/WO2011142315A1/ja active Application Filing
- 2011-05-09 EP EP11780572.1A patent/EP2570694B1/en active Active
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See also references of EP2570694A4 |
Also Published As
Publication number | Publication date |
---|---|
US8864117B2 (en) | 2014-10-21 |
EP2570694B1 (en) | 2017-05-24 |
JP5548516B2 (ja) | 2014-07-16 |
EP2570694A1 (en) | 2013-03-20 |
JP2011241845A (ja) | 2011-12-01 |
US20130049273A1 (en) | 2013-02-28 |
EP2570694A4 (en) | 2014-09-17 |
CN102884337A (zh) | 2013-01-16 |
CN102884337B (zh) | 2015-08-19 |
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