Body earth structure for vehicle and body earth path forming method

Patent metadata

Field	Value
Publication number	US-2019248307-A1
Application number	US-201916253808-A
Country	US
Kind code	A1
Filing date	Jan 22, 2019
Priority date	Feb 9, 2018
Publication date	Aug 15, 2019
Grant date	—

Abstract

A body earth structure for a vehicle includes a bolt of which a head portion is swage-joined to an aluminum vehicle body panel. The bolt is provided to fasten an earth terminal to the vehicle. The bolt includes a projection that protrudes toward the vehicle body panel, on a facing surface of the head portion of the bolt. The facing surface is provided to face the vehicle body panel.

First claim

What is claimed is:

1 . A body earth structure for a vehicle, the body earth structure comprising a bolt of which a head portion is swage-joined to an aluminum vehicle body panel, the bolt being provided to fasten an earth terminal to the vehicle,
wherein the bolt includes a projection that protrudes toward the vehicle body panel, on a facing surface of the head portion of the bolt, the facing surface being provided to face the vehicle body panel.

2 . The body earth structure according to claim 1 , wherein:
the head portion of the bolt is provided with
a protruding portion provided by an outer edge of the head portion protruding in a direction of the facing surface, and
a recessed portion that is a region positioned radially inward of the protruding portion and is approximately circular as seen in a plan view;
an outer circumferential side surface of the protruding portion is outwardly inclined toward the facing surface; and an inner circumferential side surface of the protruding portion is outwardly inclined toward the recessed portion.

3 . The body earth structure according to claim 1 , wherein the bolt is subjected to a rustproofing treatment.

4 . A body earth structure for a vehicle, the body earth structure comprising:
a bolt of which a head portion is swage-joined to an aluminum vehicle body panel, the bolt being provided to fasten an earth terminal to the vehicle; and a conductive adhesive agent interposed between a facing surface of the head portion of the bolt and the vehicle body panel, the facing surface being provided to face the vehicle body panel.

5 . The body earth structure according to claim 4 , wherein:
the head portion of the bolt is provided with
a protruding portion provided by an outer edge of the head portion protruding in a direction of the facing surface, and
a recessed portion that is a region positioned radially inward of the protruding portion and is approximately circular as seen in a plan view;
an outer circumferential side surface of the protruding portion is outwardly inclined toward the facing surface; and an inner circumferential side surface of the protruding portion is outwardly inclined toward the recessed portion.

6 . The body earth structure according to claim 4 , wherein the bolt is subjected to a rustproofing treatment.

7 . A body earth structure for a vehicle, the body earth structure comprising:
a bolt of which a head portion is swage-joined to an aluminum vehicle body panel, the bolt being provided to fasten an earth terminal to the vehicle and including a projection that protrudes toward the vehicle body panel, on a facing surface of the head portion of the bolt, the facing surface being provided to face the vehicle body panel; and a conductive adhesive agent interposed between the facing surface of the head portion of the bolt and the vehicle body panel.

8 . The body earth structure according to claim 7 , wherein:
the head portion of the bolt is provided with
a protruding portion provided by an outer edge of the head portion protruding in a direction of the facing surface, and
a recessed portion that is a region positioned radially inward of the protruding portion and is approximately circular as seen in a plan view;
an outer circumferential side surface of the protruding portion is outwardly inclined toward the facing surface; and an inner circumferential side surface of the protruding portion is outwardly inclined toward the recessed portion.

9 . The body earth structure according to claim 7 , wherein the bolt is subjected to a rustproofing treatment.

10 . A body earth path forming method for a vehicle in which a head portion of a bolt is swage-joined to an aluminum vehicle body panel and an earth terminal is fastened via the bolt, the body earth path forming method comprising:
providing a projection that protrudes toward the vehicle body panel on a facing surface of the head portion of the bolt, the facing surface being provided to face the vehicle body panel; and swage-joining the head portion of the bolt to the vehicle body panel.

11 . A body earth path forming method for a vehicle in which a head portion of a bolt is swage-joined to an aluminum vehicle body panel and an earth terminal is fastened via the bolt, the body earth path forming method comprising swage-joining the head portion of the bolt to the vehicle body panel in a state where a conductive adhesive agent is interposed between a facing surface of the head portion of the bolt and the vehicle body panel, the facing surface being provided to face the vehicle body panel.

12 . A body earth path forming method for a vehicle in which a head portion of a bolt is swage-joined to an aluminum vehicle body panel and an earth terminal is fastened via the bolt, the body earth path forming method comprising:
providing a projection that protrudes toward the vehicle body panel on a facing surface of the head portion of the bolt, the facing surface being provided to face the vehicle body panel; and swage-joining the head portion of the bolt to the vehicle body panel in a state where a conductive adhesive agent is interposed between the facing surface of the head portion of the bolt and the vehicle body panel.

Assignees

• Toyota Motor Co Ltd

Inventors

• Furusawa Takashi
• Yoshida Eiji

Classifications

• B60R16/02

  electric {constitutive elements} · CPC title

• F16B37/061

  by means of welding · CPC title

• F16B33/06

  Surface treatment of parts furnished with screw-thread, e.g. for preventing seizure {or fretting (corrosion preventing means F16B33/008; settable coatings for locking threaded members F16B39/225; deformable coatings for locking threaded members F16B39/34)} · CPC title

• F16B35/06

  Specially-shaped heads (special shape in order to rotate the bolt F16B23/00 {; separate hook adaptors for bolts F16B43/025}) · CPC title

• H01R4/64

  Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail · CPC title