Vehicle body

Patent metadata

Field	Value
Publication number	US-11667331-B2
Application number	US-202117199465-A
Country	US
Kind code	B2
Filing date	Mar 12, 2021
Priority date	Mar 19, 2020
Publication date	Jun 6, 2023
Grant date	Jun 6, 2023

Abstract

A vehicle body including side is provided. The vehicle body includes left and right side frames that extend in a vehicle body forward-rearward direction and support a collision load acting from the front or the rear, and a coupling member that is joined to open ends of the side frames and restricts displacement between the open ends in a direction in which the open ends are away from each other. The side frame has a plurality of low-strength sections disposed with high-strength sections interposed therebetween in the vehicle body forward-rearward direction and having a lower strength than the high-strength sections in the vehicle body forward-rearward direction. The low-strength section closer to the open end has a lower strength in the forward-rearward direction.

First claim

What is claimed is:

1. A vehicle body comprising:
left and right side frames that extend in a vehicle body forward-rearward direction and support a collision load acting from a front or a rear; and
a coupling member that is joined to open ends of the side frames and restricts displacement between the open ends in a direction in which the open ends are away from each other,
wherein the side frame comprises a plurality of low-strength sections disposed with high-strength sections interposed therebetween in the vehicle body forward-rearward direction and having a lower strength than the high-strength sections in the vehicle body forward-rearward direction, and
wherein the low-strength sections closer to the open end has a lower strength in the forward-rearward direction,
wherein the low-strength sections comprise a crushing section which is disposed closest to the open end and weakens inner ridgelines of the side frames and outer ridgelines of the side frames to have a low strength, and
wherein low-strength areas weakening the inner ridgelines and the outer ridgelines to have a low strength are formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming.

2. The vehicle body according to claim 1 further comprising:
a bumper beam that comprises an intermediate body linearly extending in a lateral direction from a center in the lateral direction, and inclined bodies respectively connecting the open ends of the side frames to both ends of the intermediate body and inclining in a manner of being away from the open ends as the inclined bodies go toward the intermediate body from the open ends.

3. The vehicle body according to claim 2 ,
wherein the side frame comprises
a lower member which has left and right first flanges extending in the vehicle body forward-rearward direction and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a first space extending in the forward-rearward direction using a plate material connecting the first flanges to each other, and
an upper member which has left and right second flanges extending in the vehicle body forward-rearward direction, welded to the first flanges, and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a second space extending in the forward-rearward direction and united with the first space using a plate material connecting the second flanges to each other.

4. The vehicle body according to claim 1 ,
wherein the crushing section expands from the open end.

5. The vehicle body according to claim 4 ,
wherein the side frame comprises
a lower member which has left and right first flanges extending in the vehicle body forward-rearward direction and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a first space extending in the forward-rearward direction using a plate material connecting the first flanges to each other, and
an upper member which has left and right second flanges extending in the vehicle body forward-rearward direction, welded to the first flanges, and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a second space extending in the forward-rearward direction and united with the first space using a plate material connecting the second flanges to each other.

6. The vehicle body according to claim 1 ,
wherein the low-strength sections comprises a large crushing section which is disposed away from the crushing section with a gap therebetween in the vehicle body forward-rearward direction and in which a first distortion section weakening the ridgelines on the outer side to have a low strength and a second distortion section weakening the ridgelines on the inner side to have a low strength are alternately arranged in the forward-rearward direction.

7. The vehicle body according to claim 6 ,
wherein a linear high-strength area inclining and extending in the lateral direction is demarcated between a first one side low-strength area weakening the outer ridgelines to have a low strength in the first distortion section and a second one side low-strength area weakening the inner ridgelines to have a low strength in the second distortion section.

8. The vehicle body according to claim 7 , wherein the first one side low-strength area and the second one side low-strength area are foinied of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming.

9. The vehicle body according to claim 8 ,
wherein the side frame comprises
a lower member which has left and right first flanges extending in the vehicle body forward-rearward direction and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a first space extending in the forward-rearward direction using a plate material connecting the first flanges to each other, and
an upper member which has left and right second flanges extending in the vehicle body forward-rearward direction, welded to the first flanges, and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a second space extending in the forward-rearward direction and united with the first space using a plate material connecting the second flanges to each other.

10. The vehicle body according to claim 7 ,
wherein the side frame comprises
a lower member which has left and right first flanges extending in the vehicle body forward-rearward direction and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a first space extending in the forward-rearward direction using a plate material connecting the first flanges to each other, and
an upper member which has left and right second flanges extending in the vehicle body forward-rearward direction, welded to the first flanges, and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a second space extending in the forward-rearward direction and united with the first space using a plate material connecting the second flanges to each other.

11. The vehicle body according to claim 7 ,
wherein the side frame has a bead extending in a manner of intersecting the first distortion section and the second distortion section in the vehicle body forward-rearward direction along an axis at a center in a vehicle width direction.

12. The vehicle body according to claim 6 ,
wherein the side frame comprises
a lower member which has left and right first flanges extending in the vehicle body forward-rearward direction and at least partially formed of a softer metal plate material than high-strength areas in accordance with temperature control during hot stamp forming, and partitions a first space extending in the forward-rearward direction using a plate material connecting the first flanges to each other, and
an upper member which has left and right second flanges extending in the vehicle body forward-rearward direction, welded to the first flanges, and at least partially

Assignees

• Honda Motor Co Ltd

Inventors

• Hasegawa Atsushi
• Tsuji Keiichiro
• Yoshikawa Koji
• Fujii Takayuki
• Miura Yusuke
• Shimizu Tomohiro
• Saito Yumi

Classifications

• B62D25/08

  Front or rear portions {(sub-frames for mounting engine or suspensions B62D21/11)} · CPC title

• B60R19/26

  comprising yieldable mounting means ({B60R19/38 takes precedence;} springs, shock absorbers, or means for damping vibrations per se F16F) · CPC title

• B62D21/152 Primary

  Front or rear frames · CPC title