Vehicle member joining structure and vehicle member joining method

Patent metadata

Field	Value
Publication number	US-2016347377-A1
Application number	US-201615072966-A
Country	US
Kind code	A1
Filing date	Mar 17, 2016
Priority date	May 27, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

A vehicle member joining structure has: a metal member that is part of a vehicle; a resin member that is adjacent to the metal member; and an adhesive that is provided between the metal member and the resin member and joins the metal member to the resin member, the adhesive having an elastic modulus that is lower than elastic moduli of the metal member and the resin member, wherein, given that (i) ΔL is a difference in linear expansions of the metal member and the resin member at a time of heating in a drying process after application of the adhesive, (ii) T 0 is a thickness of the adhesive and (iii) T 1 is a length of an end surface of the adhesive, the following predetermined relational expression is satisfied
T 1 2 =T 0 2 +ΔL 2 .

First claim

What is claimed is:

1 . A vehicle member joining structure comprising:
a metal member that is part of a vehicle; a resin member that is adjacent to the metal member; and an adhesive that is provided between the metal member and the resin member and joins the metal member to the resin member, the adhesive having an elastic modulus that is lower than elastic moduli of the metal member and the resin member, wherein, given that (i) ΔL is a difference in linear expansions of the metal member and the resin member at a time of heating in a drying process after application of the adhesive, (ii) T 0 is a thickness of the adhesive and (iii) T 1 is a length of an end surface of the adhesive, the following relational expression is satisfied:
T 1 2 =T 0 2 +ΔL 2 .

2 . The vehicle member joining structure of claim 1 , wherein
a first through-hole is formed in the metal member, and a second through-hole is formed in the resin member coaxially with the first through-hole, a fastening member that fastens the metal member and the resin member together is inserted through the first through-hole and the second through-hole, and a gap between a shaft of the fastening member and an inner periphery of at least one of the first through-hole and the second-through hole is larger than the difference in linear expansions of the metal member and the resin member at the time of heating in the drying process.

3 . The vehicle member joining structure of claim 2 , wherein
the fastening member has (1) a first head that extends along the resin member from one end of the shaft and anchors on the resin member, and (2) a second head that extends along the metal member from another end of the shaft and anchors on the metal member, and a surface area of a first region at which the metal member and the second head overlap as seen from an axial direction of the fastening member is larger than a surface area of a second region at which the resin member and the first head overlap as seen from the axial direction of the fastening member.

4 . The vehicle member joining structure of claim 3 , wherein the adhesive is provided between the shaft and the metal member and between the shaft and the resin member.

5 . A vehicle member joining method comprising:
applying, to at least one of a metal member and a resin member, an adhesive having an elastic modulus that is lower than elastic moduli of the metal member and the resin member and that stretches in accordance with relative displacement of the metal member and the resin member that is due to a difference in linear expansions of the metal member and the resin member at a time of heating in a drying process after applying the adhesive; superposing and joining the metal member and the resin member by the adhesive in a state in which a first through-hole that is formed in the metal member and a second through-hole that is formed in the resin member are made to face one another; and inserting a fastening member through the first through-hole and the second through-hole, and fastening the metal member and the resin member together with the fastening member.

6 . The method of claim 5 , further comprising heating the superposed metal member and resin member after the fastening so as to dry the adhesive.

7 . The method of claim 5 , wherein given that (i) ΔL is a difference in linear expansions of the metal member and the resin member at a time of heating in the drying process after application of the adhesive, (ii) T 0 is a thickness of the adhesive and (iii) T 1 is a length of an end surface of the adhesive, the following relational expression is satisfied:
T 1 2 =T 0 2 +ΔL 2 .

8 . The method of claim 5 , wherein the adhesive is provided between a shaft of the fastening member and the metal member and between the shaft of the fastening member and the resin member.

Assignees

• Toyota Motor Co Ltd

Inventors

• Minei Taichi

Classifications

• Y10T428/24942

  including components having same physical characteristic in differing degree · CPC title

• Y10T428/24322

  Composite web or sheet · CPC title

• B62D29/005 Primary

  preformed metal and synthetic material elements being joined together, e.g. by adhesives · CPC title

• Y10T428/24752

  Laterally noncoextensive components · CPC title

• B29C65/483

  Reactive adhesives, e.g. chemically curing adhesives · CPC title