US 11,873,024 B2
Suspension subframe structure
Hiroyuki Okamoto, Hiroshima (JP); Masaaki Tanaka, Hiroshima (JP); and Fumihiro Kurohara, Hiroshima (JP)
Assigned to MAZDA MOTOR CORPORATION, Hiroshima (JP)
Appl. No. 17/276,300
Filed by MAZDA MOTOR CORPORATION, Hiroshima (JP)
PCT Filed Sep. 13, 2019, PCT No. PCT/JP2019/036164
§ 371(c)(1), (2) Date Mar. 15, 2021,
PCT Pub. No. WO2020/059669, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 2018-175213 (JP), filed on Sep. 19, 2018.
Prior Publication US 2021/0261195 A1, Aug. 26, 2021
Int. Cl. B62D 21/15 (2006.01); B62D 21/11 (2006.01); B60R 19/24 (2006.01)
CPC B62D 21/155 (2013.01) [B62D 21/11 (2013.01); B60R 19/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A suspension subframe structure comprising:
a suspension subframe that supports a suspension member for a front wheel, characterized in that the suspension subframe includes: a body that transmits an impact load input from a vehicle front side toward a vehicle rear side; a fixed portion disposed near the body and fixed to a vehicle body; and a connection portion connecting the fixed portion to the body,
the connection portion comprises an upper plate member and a lower plate member,
a reinforcement member is mounted at a portion of the connection portion located between the fixed portion and the body, the reinforcement member connects the upper plate member and the lower plate member in a vehicle up-down direction,
the connection portion is provided with a fragile portion having a lower strength against a load in a vehicle front-rear direction than the body and the fixed portion,
the upper plate member and the lower plate member of the connection portion have a lower strength against a load in the vehicle front-rear direction than that of the body and the fixed portion,
a portion of the upper plate member and the lower plate member of the connection portion in a vehicle width direction that is located closer to the fixed portion relative to the reinforcement member and in a frontward of the fixed portion is not reinforced by the reinforcement member in order to form the fragile portion with a lower strength against a load in the vehicle front-rear direction than other portions in the connection portion, and
the reinforcement member and the fragile portion are provided at a same level in the vehicle up-down direction.