Resin structure and vehicle component

Patent metadata

Field	Value
Publication number	US-10507873-B2
Application number	US-201615560586-A
Country	US
Kind code	B2
Filing date	Feb 25, 2016
Priority date	Mar 24, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A resin structure having an impact absorbing property includes a resin member including a resin material and having an uneven thickness structure. The resin member includes a thick-walled portion having an average thickness of a first value in an impact absorbing direction and two thin-walled portions having an average thickness of less than the first value in the impact absorbing direction. The thick-walled portion is disposed between the two thin-walled portions. The Expressions (I) and (II) are satisfied.

1< t 1/ t 2<1.545×( L/d ) −0.107   (I)

L/d >0  (II)

In Expressions (I) and (II), t1 represents an average thickness (mm) of the thick-walled portion. t2 represents an average thickness (mm) of the thin-walled portions. L represents an inter-connection-point distance (mm) between connection points formed on the two thin-walled portions, respectively, and connected to other structures. d represents a maximum height (mm) in the impact absorbing direction in a range between the connection points of the resin member.

First claim

The invention claimed is:

1. A resin structure having an impact absorbing property, comprising:
a resin member including a resin material and having an uneven thickness structure,
wherein the resin member includes a thick-walled portion having an average thickness of a first value in an impact absorbing direction and two thin-walled portions having an average thickness of less than the first value in the impact absorbing direction,
the overall shape of the resin member is convex into the impact absorbing direction,
the thick-walled portion is disposed between the two thin-walled portions,
wherein one thin-walled portion, the thick-walled portion, and the other thin-walled portion are disposed in that order, and
the following Expressions (I) and (II) are satisfied,
1< t 1/ t 2<1.545×( L/d ) −0.107   (I)

L/d> 0  (II)

wherein t1 represents an average thickness (mm) of the thick-walled portion, t2 represents an average thickness (mm) of the thin-walled portions, L represents an inter-connection-point distance (mm) between connection points which are formed on the two thin-walled portions, respectively, and are connected to other structures, and d represents a maximum height (mm) in the impact absorbing direction in a range between the connection points of the resin member.

2. The resin structure according to claim 1 ,
wherein the resin structure is formed of a single resin member.

3. The resin structure according to claim 1 ,
wherein the resin material is a fiber-reinforced resin material including reinforcing fibers and a matrix resin.

4. The resin structure according to claim 3 ,
wherein the fiber-reinforced resin material has a tensile modulus of 10 GPa or higher and a tensile strength of 100 MPa or higher.

5. A vehicle component comprising:
a resin structure according to claim 1 .

Assignees

• Teijin Ltd

Inventors

• Teshima Masatomo

Classifications

• B60R2019/1833

  made of plastic material · CPC title

• B60R19/02

  Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects ({B60R19/56 takes precedence; initiating brake action by contact of bumper with an external object B60T7/22; for rail vehicles B61F19/04; safety equipment for cycles B62J27/00;} integral with waterborne vessels or specially adapted therefor B63B59/02) · CPC title

• B62D29/04

  predominantly of synthetic material (working of plastics or substances in a plastic state B29) · CPC title

• B62D29/043 Primary

  Superstructures (B62D25/161 takes precedence) · CPC title

• B62D25/025

  Side sills thereof · CPC title