公开(公告)号：EP2685125B1

公开(公告)日：2018-04-25

申请号：EP12754600.0

申请日：2012-02-27

Applicant: NHK Spring Co., Ltd.

Inventor： SHIGEMATSU, Ryohei ,  NAKAZONO, Miho

IPC: F16F1/18 ,  F16F1/368

CPC classification number: F16F1/368

Abstract: A fiber reinforced plastic spring is provided, in which broken pieces can be prevented from being scattered when breaking without using any additional member and variation in load when breaking can be reduced. FRP spring 1 has a layered structure 20 having basic unit 20A consisting of positive direction orientating layer 21 and negative direction orientating layer 22. Orientating directions S1 and S2 of the positive direction orientating layer 21 and the negative direction orientating layer 22 mutually adjacent are mutually intersecting. By appropriately setting an absolute value of orientating angles ¸1 and ¸2 of each layer 21 and 22, fibers in the positive direction orientating layer 21 and the negative direction orientating layer 22 can be entangled mutually, and thus, the spring as a whole exhibits pseudo-ductility in a breakage condition. Elastic modulus and strength available for use as a spring can be obtained and breaking at a resin portion between fibers can be prevented in each layer 21 and 22.

公开(公告)号：EP2685125A1

公开(公告)日：2014-01-15

申请号：EP12754600.0

申请日：2012-02-27

Applicant: Nhk Spring Co., Ltd.

Inventor： SHIGEMATSU, Ryohei ,  NAKAZONO, Miho

IPC: F16F1/18

CPC classification number: F16F1/368

Abstract: A fiber reinforced plastic spring is provided, in which broken pieces can be prevented from being scattered when breaking without using any additional member and variation in load when breaking can be reduced. FRP spring 1 has a layered structure 20 having basic unit 20A consisting of positive direction orientating layer 21 and negative direction orientating layer 22. Orientating directions S1 and S2 of the positive direction orientating layer 21 and the negative direction orientating layer 22 mutually adjacent are mutually intersecting. By appropriately setting an absolute value of orientating angles θ1 and θ2 of each layer 21 and 22, fibers in the positive direction orientating layer 21 and the negative direction orientating layer 22 can be entangled mutually, and thus, the spring as a whole exhibits pseudo-ductility in a breakage condition. Elastic modulus and strength available for use as a spring can be obtained and breaking at a resin portion between fibers can be prevented in each layer 21 and 22.

Abstract translation: 本发明提供一种纤维增强塑料弹簧，其能够在不使用任何附加部件的情况下破碎时防止碎片飞散，并且可以减少破裂时的负载变化。 FRP弹簧1具有分层结构20，其具有由正方向取向层21和负方向取向层22组成的基本单元20A。正方向取向层21和负方向取向层22相互相邻的取向方向S1和S2相互交叉 。 通过适当地设定各层21,22的取向角度θ1，θ2的绝对值，能够使正方向取向层21和负方向取向层22中的纤维相互缠绕，因此， 在破损条件下的延展性。 可以获得可用作弹簧的弹性模量和强度，并且可以防止在每个层21和22中在纤维之间的树脂部分断裂。

公开(公告)号：EP2570694B1

公开(公告)日：2017-05-24

申请号：EP11780572.1

申请日：2011-05-09

Applicant: NHK Spring Co.,Ltd.

Inventor： SHIGEMATSU, Ryohei ,  NAKAZONO, Miho

IPC: F16F1/18 ,  B32B5/28 ,  B60G11/02 ,  F16F1/02 ,  F16F1/368 ,  B32B5/26

CPC classification number: B60G11/02 ,  B32B5/26 ,  B32B2250/20 ,  B32B2260/023 ,  B32B2260/046 ,  B32B2262/0269 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2307/50 ,  B32B2307/51 ,  B32B2307/54 ,  B32B2605/00 ,  B60G2202/11 ,  B60G2206/7101 ,  F16F1/368

公开(公告)号：EP2570694A1

公开(公告)日：2013-03-20

申请号：EP11780572.1

申请日：2011-05-09

Applicant: NHK Spring Co.,Ltd.

Inventor： SHIGEMATSU, Ryohei ,  NAKAZONO, Miho

IPC: F16F1/18 ,  B32B5/28 ,  B60G11/02 ,  F16F1/02

CPC classification number: B60G11/02 ,  B32B5/26 ,  B32B2250/20 ,  B32B2260/023 ,  B32B2260/046 ,  B32B2262/0269 ,  B32B2262/101 ,  B32B2262/106 ,  B32B2307/50 ,  B32B2307/51 ,  B32B2307/54 ,  B32B2605/00 ,  B60G2202/11 ,  B60G2206/7101 ,  F16F1/368

Abstract: A fiber reinforced plastic spring which enables prevention of breakage caused by compressive stress is provided.
The FRP spring 1 has a laminated structure (reference numeral 20 in case of three-layer structure, reference numeral 30 in case of five-layer structure) having plural fibers which are different from each other in tensile modulus of elasticity and are laminated. An upper surface of the FRP spring 1 is a surface to which pulsating bending load is applied. An upper side region of each laminated structure 20 and 30, which is upper with respect to the neutral axis S, is a compressive stress region at which compressive stress is generated. A lower side region of each laminated structure 20 and 30, which is lower with respect to the neutral axis S, is a tensile stress region at which tensile stress is generated. Distribution of tensile modulus of elasticity of each laminated structure 20 and 30 is asymmetric with respect to the neutral axis S. In this case, it is desirable that a tensile modulus of elasticity of each layer 23 and 35 which is the surface layer portion of compressive stress generation region be the lowest, and a tensile modulus of elasticity of each layer 21 and 31 which is the surface layer portion of tensile stress generation region be lower than that of each layer 22 and 33 which is the neutral axis portion.