Subframe structure

Patent metadata

Field	Value
Publication number	US-11198473-B2
Application number	US-201916970762-A
Country	US
Kind code	B2
Filing date	Feb 12, 2019
Priority date	Feb 20, 2018
Publication date	Dec 14, 2021
Grant date	Dec 14, 2021

Abstract

A subframe structure includes a subframe disposed below a vehicle body structure of a vehicle, and an extension frame extending forward from the subframe and configured to absorb an impact load from forward of a vehicle body. The subframe has a body part extending in a vehicle front-and-rear direction and a mount support part supporting a power train through a mount. The body part is fixed to the vehicle body structure through the mount support part.

First claim

What is claimed is:

1. A subframe structure, comprising:
a subframe disposed below a vehicle body structure of a vehicle; and
an extension frame extending forward from the subframe and configured to absorb an impact load from forward of a vehicle body,
wherein the subframe has a body part extending in a vehicle front-and-rear direction and a mount support part supporting a power train through a mount, and
wherein the body part is fixed to the vehicle body structure through the mount support part.

2. The subframe structure of claim 1 , wherein the mount support part and the vehicle body structure are rigidly coupled, without having an attenuating element therebetween.

3. The subframe structure of claim 2 , wherein the mount support part is provided with:
an accommodating part configured to permit a connection of the mount with a bracket provided to a power train side and accommodate the mount therein from below;
a vehicle body attaching part extending upward from near the accommodating part; and
a reinforcement part disposed between the accommodating part and the vehicle body attaching part, and reinforcing between the accommodating part and the vehicle body attaching part.

4. The subframe structure of claim 3 , wherein the reinforcement part is a rib connecting the vehicle body attaching part and a part of the accommodating part below the vehicle body attaching part, between the vehicle body attaching part and the part of the accommodating part.

5. The subframe structure of claim 4 , wherein the vehicle body attaching part is disposed adjacent to the accommodating part in a bottom view.

6. The subframe structure of claim 3 , wherein the vehicle body attaching part is disposed adjacent to the accommodating part in a bottom view.

7. The subframe structure of claim 1 , wherein the mount support part is provided with:
an accommodating part configured to permit a connection of the mount with a bracket provided to a power train side and accommodate the mount therein from below;
a vehicle body attaching part extending upward from near the accommodating part; and
a reinforcement part disposed between the accommodating part and the vehicle body attaching part, and reinforcing between the accommodating part and the vehicle body attaching part.

8. The subframe structure of claim 7 , wherein the reinforcement part is a rib connecting the vehicle body attaching part and a part of the accommodating part below the vehicle body attaching part, between the vehicle body attaching part and the part of the accommodating part.

9. The subframe structure of claim 8 , wherein the vehicle body attaching part is disposed adjacent to the accommodating part in a bottom view.

10. The subframe structure of claim 7 , wherein the vehicle body attaching part is disposed adjacent to the accommodating part in a bottom view.

11. The subframe structure of claim 1 , wherein the body part and the mount support part are separate parts,
wherein a cross member extending inward from the body part in a vehicle width direction is coupled to the body part, and
wherein the mount support part is fixed to the body part and the cross member.

12. The subframe structure of claim 1 , wherein the subframe includes a pair of left and right subframes, each of the subframes further including:
a link support part supporting a suspension link;
a rear vehicle body attaching part fixing the body part to the vehicle body structure at a location rearward of the link support part; and
a second vehicle body attaching part fixing the body part to the vehicle body structure at a location forward of the link support part,
wherein the suspension link extends forward from the link support part, and
wherein a rotational axis of the suspension link is provided so as to intersect with a line segment connecting between the rear vehicle body attaching part and the second vehicle body attaching part.

13. The subframe structure of claim 1 , wherein the vehicle body structure includes a frontside frame extending in the vehicle front-and-rear direction above the extension frame and the body part, and
wherein the subframe is fixed to the frontside frame.

Assignees

• Mazda Motor

Inventors

• Okamoto Hiroyuki
• Tanaka Masaaki
• Hiramatsu Masaya
• Hayakawa Yuki

Classifications

• B62D21/00

  Understructures, i.e. chassis frame on which a vehicle body may be mounted (combined frame and vehicle body B62D23/00 {; characterised by the material thereof B62D29/00}) · CPC title

• B60R19/12

  vertically spaced · CPC title

• B62D29/008

  predominantly of light alloys, e.g. extruded · CPC title

• B62D21/11 Primary

  with resilient means for suspension {, e.g. of wheels or engine; sub-frames for mounting engine or suspensions} · CPC title

• B62D21/03

  transverse members providing body support · CPC title