Vehicle rear section structure

Patent metadata

Field	Value
Publication number	US-9862420-B2
Application number	US-201615369517-A
Country	US
Kind code	B2
Filing date	Dec 5, 2016
Priority date	Dec 25, 2015
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

A vehicle rear section structure includes: left and right rear side members disposed along a front-rear direction at both width direction sides of a rear floor pan; a rear suspension member that includes left and right side sections disposed along the front-rear direction, both front-rear end portions thereof being attached to respective front portions of the rear side members; and left and right reinforcement members extending along the front-rear direction, and being disposed at a width direction inner side of rear portions of the side members and at a rear side of the rear suspension member, each including a straight ridgeline section extending along the front-rear direction from a front end portion across to a rear end portion of the reinforcement member, at least part of the respective front end portion of the reinforcement member overlapping the respective side section of the rear suspension member in a front-rear direction view.

First claim

What is claimed is:

1. A vehicle rear section structure comprising:
left and right rear side members that are disposed with length directions along a vehicle front-rear direction at both vehicle width direction sides of a rear floor pan;
a rear suspension member that comprises left and right side sections disposed with length directions along the vehicle front-rear direction, both front and rear end portions of the left and right side sections being attached to respective front portions of the left and right rear side members; and
left and right reinforcement members having length directions along the vehicle front-rear direction, the left and right reinforcement members being disposed at a vehicle width direction inner side of rear portions of the left and right side members and at a vehicle rear side of the rear suspension member, each of the left and right reinforcement members comprising a ridgeline section extending in a straight line along the vehicle front-rear direction from a front end portion across to a rear end portion of the reinforcement member, at least part of the respective front end portion of the reinforcement member overlapping the respective left or right side section of the rear suspension member in a vehicle front-rear direction view.

2. The vehicle rear section structure of claim 1 , further comprising:
rear bumper reinforcement that is disposed with a length direction along the vehicle width direction at the vehicle rear side of rear end portions of the left and right rear side members,
wherein at least part of each of the rear end portions of the left and right reinforcement members overlaps the rear bumper reinforcement in a vehicle front-rear direction view.

3. The vehicle rear section structure of claim 1 , further comprising
a rear cross member that links respective front-rear direction intermediate portions of the left and right rear side members together in the vehicle width direction, the rear cross member interposing between the left and right reinforcement members and the left and right side sections.

4. The vehicle rear section structure of claim 1 , wherein the left and right reinforcement members comprise:
left and right above-floor reinforcement members that are joined to an upper face of the rear floor pan; and
left and right under-floor reinforcement members that are joined to a lower face of the rear floor pan.

5. The vehicle rear section structure of claim 3 , further comprising
left and right front brackets that couple the respective front end portions of the left and right reinforcement members and the rear cross member together.

6. The vehicle rear section structure of claim 1 , further comprising:
a lower back that is joined to a rear end portion of the rear floor pan; and
left and right rear brackets that couple the respective rear end portions of the left and right reinforcement members and the lower back together.

7. The vehicle rear section structure of claim 1 , further comprising:
a rear cross member that links respective front-rear direction intermediate portions of the left and right rear side members together in the vehicle width direction, the rear cross member supporting the respective front end portions of the left and right reinforcement members; and
a lower back that is joined to a rear end portion of the rear floor pan, the lower back supporting the respective rear end portions of the left and right reinforcement members,
wherein the left and right reinforcement members are not being joined to the rear floor pan.

8. The vehicle rear section structure of claim 1 , further comprising
left and right coupling sections that couple the respective reinforcement members to the respective rear side members positioned at the vehicle width direction outer side of the respective reinforcement members.

9. The vehicle rear section structure of claim 2 , further comprising:
left and right projection sections that project out from one of the rear bumper reinforcement or the respective rear end portions of the left and right reinforcement members toward a side of the other of the rear bumper reinforcement or the respective rear end portions of the left and right reinforcement members, wherein the respective rear end portions of the left and right reinforcement members being positioned separated from and at the vehicle front side of the rear bumper reinforcement; and
left and right hole sections that are each formed in the other of the rear bumper reinforcement or the respective rear end portions of the left and right reinforcement members, the respective left or right projection section being inserted into the respective left and right hole sections at least when the rear bumper reinforcement has been displaced toward the respective left and right reinforcement member side under collision load in a rear-end collision.

10. The vehicle rear section structure of claim 9 , further comprising a lower back that is joined to a rear end portion of the rear floor pan,
wherein the rear bumper reinforcement is disposed at the vehicle rear side of the lower back, and
wherein the left and right projection sections comprise fastener fastening the lower back and the rear bumper reinforcement together.

11. The vehicle rear section structure of claim 1 , wherein:
the left and right side sections comprise left and right side section main bodies that includes both front and rear end portions being attached to the respective front portions of the left and right rear side members, and left and right load bearing sections that respectively project out from the left and right side section main bodies; and
at least part of each of the front end portions of the left and right reinforcement members overlaps the respective left or right load bearing section in a vehicle front-rear direction view.

12. The vehicle rear section structure of claim 3 , further comprising
left and right bulk members that are provided inside a closed cross-section and that are respectively interposed between the left and right reinforcement members and the left and right side sections, wherein the closed cross-section is formed by the rear cross member and is extending along the vehicle width direction.

Assignees

• Toyota Motor Co Ltd

Inventors

• Kato Hiroshi
• Nakane Yuji
• Kumazawa Yasuyuki
• Hata Masatoshi
• Shimasaki Osamu
• Onodera Takaaki
• Hashiguchi Shohei
• Amano Hiroshi

Classifications

• B62D21/08

  built up with interlaced cross members · CPC title

• B62D29/007

  predominantly of special steel or specially treated steel, e.g. stainless steel or locally surface hardened steel · CPC title

• B62D25/2027

  the subunits being rear structures · CPC title

• B62D25/087

  Luggage compartments · CPC title

• B60Y2306/01

  Reducing damages in case of crash, e.g. by improving battery protection · CPC title