Sub frame structure of vehicle

Patent metadata

Field	Value
Publication number	US-9682727-B2
Application number	US-201614988850-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 16, 2015
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A sub frame structure of a vehicle comprises a pair of right-and-left side members and a front cross member interconnecting the side members in a vehicle width direction. The side member includes a front support bracket and a rear member holding member which are arranged along the vehicle longitudinal direction and to which a front connection portion and a rear connection portion of the upper-side lower arm are pivotally connected, and comprises a front part positioned in front of the front support bracket. Herein, the front part of the side member is rigidly connected to a floor frame of a vehicle body at its front end and configured in a long shape such that the front part extends obliquely forward and outward, in the vehicle width direction, from a position where the front support bracket is provided.

First claim

What is claimed is:

1. A sub frame structure of a vehicle, comprising:
a pair of right-and-left side members extending in a vehicle longitudinal direction, to which a pair of right-and-left arm members supporting right-and-left rear wheels are connected;
a front cross member interconnecting the pair of right-and-left side members in a vehicle width direction;
a rear cross member provided in back of the front cross member and extending in the vehicle width direction, both end portions, in the vehicle width direction, of which are rigidly connected to a first high-rigidity member of a vehicle body; and
a pair of right-and-left upper members interconnecting each outward side of an upper portion of the front cross member and an upper portion of the rear cross member in the vehicle longitudinal direction,
wherein said side members are configured to extend substantially horizontally in a side view, and extend obliquely forward and outward, in the vehicle width direction, from rear end portions thereof toward front end portions thereof such that a distance, in the vehicle width direction, between the both rear end portions is smaller than that between the both front end portions, whereby each substantially triangular-shaped area enclosed by each rear part of the side members, each of said upper members, and said rear cross member is formed in a plan view,
the front end portion of each of said side members is rigidly connected to a second high-rigidity member of the vehicle body and the rear end portion of each of the side members is held at said rear cross member, and
each of said side members includes plural arm connection portions which are arranged along the vehicle longitudinal direction and to which plural end portions of each of said arm members are pivotally connected.

2. The sub frame structure of the vehicle of claim 1 , wherein a connection position of said side member to said second high-rigidity member is located in front of a position of a rear end of an auxiliary device which is arranged in front of said front cross member, being spaced apart from said front cross member.

3. The sub frame structure of the vehicle of claim 1 , wherein said first high-rigidity member is connected to said second high-rigidity member.

4. The sub frame structure of the vehicle of claim 1 , wherein said second high-rigidity member is a floor frame that extends in the vehicle longitudinal direction below a floor forming a bottom portion of the vehicle body.

5. The sub frame structure of the vehicle of claim 4 , wherein a connection position of said side member to said second high-rigidity member is located in front of a position of a rear end of an auxiliary device which is arranged in front of said front cross member, being spaced apart from said front cross member.

Assignees

• Mazda Motor

Inventors

• Tanaka Masaaki
• Komiya Katsuyuki

Classifications

• B62D21/11 Primary

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

• B60G3/20

  all arms being rigid · CPC title

• B60G2200/18

  Multilink suspensions, e.g. elastokinematic arrangements · CPC title