Vehicle lower section structure

Patent metadata

Field	Value
Publication number	US-10358168-B2
Application number	US-201715793841-A
Country	US
Kind code	B2
Filing date	Oct 25, 2017
Priority date	Nov 8, 2016
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

A crossing member disposed along a vehicle width direction between inflected portions of side members is capable of transmitting load from one of the side members to the other of the side members when the one side member deforms toward a vehicle width direction inward. Accordingly, when collision load is input due to an offset collision or the like, the collision load is transmitted from the one side member input with the collision load to the other side member through the crossing member, and the collision load is supported by the other side member.

First claim

What is claimed is:

1. A vehicle lower section structure comprising:
a floor panel configuring part of a floor section of a vehicle body having a monocoque structure;
a pair of left and right side members configuring part of a frame extending in a vehicle front-rear direction of the vehicle body, each side member including:
a side member front extending straight along the vehicle front-rear direction as viewed along a vehicle vertical direction; and
a side member rear joined to the floor panel at a vehicle lower side of the floor panel, and provided with an inflected portion extending from the side member front so as to spread out toward a vehicle width direction outward as viewed along the vehicle vertical direction;

a power supply section disposed between the side members at the vehicle lower side of the floor panel and configured to supply power to a power unit installed to the vehicle;
a crossing section running along the vehicle width direction between the inflected portions and configured to transmit a load from one of the side members to the other of the side members in a case in which the one side member deforms toward the vehicle width direction inward; and
a torque box disposed at a vehicle width direction outer side of the one side member, a vertical wall of the torque box at a vehicle rear of the torque box as viewed along the vehicle width direction being disposed at a position overlapping with a vertical wall at a vehicle rear of the crossing section, and being joined to the one side member and to a rocker extending in the vehicle front-rear direction along a peripheral edge on a vehicle width direction outer side of the floor panel.

2. The vehicle lower section structure of claim 1 , wherein:
as viewed along the vehicle width direction, a lower side wall configuring a vehicle lower side of the reinforcement section is disposed so as to overlap with a lower wall configuring a vehicle lower side portion of the one side member, or is coupled to the lower wall; and
the load can be transmitted from the lower wall to the lower side wall.

3. The vehicle lower section structure of claim 1 , further comprising:
a battery case configuring an outer shell of the power supply section; and
a reinforcement section serving as the crossing section disposed inside the battery case,
wherein the reinforcement section is configured so as to deform less readily than the battery case with respect to the load.

4. The vehicle lower section structure of claim 1 , wherein the battery case is fixed to a lower wall configuring a vehicle lower side portion of the one side member via a fastening member.

5. The vehicle lower section structure of claim 1 , wherein as viewed along the vehicle vertical direction, the reinforcement section is disposed on a straight line connecting an inflection point between the side member front and the side member rear of the one side member to an inflection point between the side member front and the side member rear of the other side member.

6. A vehicle lower section structure comprising:
a floor panel configuring part of a floor section of a vehicle body having a monocoque structure;
a pair of left and right side members configuring part of a frame extending in a vehicle front-rear direction of the vehicle body, each side member including:
a side member front extending straight along the vehicle front-rear direction as viewed along a vehicle vertical direction; and
a side member rear joined to the floor panel at a vehicle lower side of the floor panel, and provided with an inflected portion extending from the side member front so as to spread out toward a vehicle width direction outward as viewed along the vehicle vertical direction;

a power supply section disposed between the side members at the vehicle lower side of the floor panel and configured to supply power to a power unit installed to the vehicle;
a crossing section coupling the side members together, the crossing section being, as viewed along the vehicle vertical direction, disposed between the inflected portions on a straight line connecting an inflection point between the side member front and the side member rear of one of the side members to an inflection point between the side member front and the side member rear of the other of the side members; and
a torque box disposed at a vehicle width direction outer side of the one side member, a vertical wall of the torque box at a vehicle rear of the torque box as viewed along the vehicle width direction being disposed at a position overlapping with a vertical wall at a vehicle rear of the crossing section, and being joined to the one side member and to a rocker extending in the vehicle front-rear direction along a peripheral edge on a vehicle width direction outer side of the floor panel.

7. A vehicle lower section structure comprising:
a floor panel configuring part of a floor section of a vehicle body having a monocoque structure;
a pair of left and right side members configuring part of a frame extending in a vehicle front-rear direction of the vehicle body, each side member including:
a side member front extending straight along the vehicle front-rear direction as viewed along a vehicle vertical direction; and
a side member rear joined to the floor panel at a vehicle lower side of the floor panel, and provided with an inflected portion extending from the side member front so as to spread out toward a vehicle width direction outward as viewed along the vehicle vertical direction;

a power supply section disposed between the side members at the vehicle lower side of the floor panel and configured to supply power to a power unit installed to the vehicle;
a battery case configuring an outer shell of the power supply section; and
a reinforcement section disposed inside the battery case and running along the vehicle width direction between the inflected portions and configured to transmit a load from one of the side members to the other of the side members in a case in which the one side member deforms toward the vehicle width direction inward, the reinforcement section being configured so as to deform less readily than the battery case with respect to the load.

8. A vehicle lower section structure comprising:
a floor panel configuring part of a floor section of a vehicle body having a monocoque structure;
a pair of left and right side members configuring part of a frame extending in a vehicle front-rear direction of the vehicle body, each side member including:
a side member front extending straight along the vehicle front-rear direction as viewed along a vehicle vertical direction; and
a side member rear joined to the floor panel at a vehicle lower side of the floor panel, and provided with an inflected portion extending from the side member front so as to spread out toward a vehicle width direction outward as viewed along the vehicle vertical direction;

a power supply section disposed between the side members at the vehicle lower side of the floor panel and configured to supply power to a power unit installed to the vehicle;
a battery case configuring an outer shell of the power supply section; and
a reinforcement section disposed inside the battery case and coupling the side members together, the reinforcement section being, as viewed along the vehicle vertical direction, disposed between the inflected portions on a straight line connecting an inflection point between the side member front and the side member rear of one of the side members to an inflection point between the side member front and the side member rear of the other of the side members, the reinforcement section being configured so as to deform less readily than the battery case with respect to a load.

Assignees

• Toyota Motor Co Ltd

Inventors

• Atsumi Hyuga
• Takayanagi Junichi
• Yoshimoto Kenichiro
• Tanabe Daisuke
• Kawase Kyosuke

Classifications

• B62D21/02

  comprising longitudinally or transversely arranged frame members · CPC title

• B62D21/157

  for side impacts · CPC title

• B62D21/15

  having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body (bumpers B60R19/02; shock absorbers in general F16F) · CPC title

• B62D23/00

  Combined superstructure and frame, i.e. monocoque constructions ({having impact absorbing means B62D21/15; } superstructure {or monocoque structure} sub-units {or parts or details thereof} B62D25/00 {; characterised by the material thereof B62D29/00}) · CPC title

• B60K1/04

  of the electric storage means for propulsion · CPC title