SUSPENSION FRAME STRUCTURE

To provide a suspension frame structure which can secure the high rigidity with respect to an input load from a suspension and improve the steering stability and NVH performance.SOLUTION: A suspension frame 1 comprises: a frame body part 10 which extends in the vehicle width direction; and a pair of right and left brace parts 20 which connects the frame body part 10 and a vehicle body. The brace part 20 comprises: a bottom surface part 21 which extends in the vehicle cross direction; and an inner sidewall part 22 and an outer sidewall part 23 which respectively extend to the vehicle upper side from both sides in the vehicle width direction of the bottom surface part 21. An interval between the inner sidewall part 22 and the outer sidewall part 23 is formed to be wider as approaching the side of the frame body part 10 from the side of the vehicle body. The inner sidewall part 22 is formed such that the upper side part is located on the inner side in the vehicle width direction with respect to a lower side part and the height in the vehicle vertical direction and the width in the vehicle width direction of an inclined surface connecting the upper side part and the lower side part increase as approaching the side of the frame body part 10.SELECTED DRAWING: Figure 2 【課題】サスペンションからの入力荷重に対して高い剛性を確保し、操縦安定性能およびＮＶＨ性能を向上させることができるサスペンションフレーム構造を提供する。【解決手段】サスペンションフレーム１は、車幅方向に延びるフレーム本体部１０と、フレーム本体部１０と車体とを繋ぐ左右一対のブレース部２０と、を備える。ブレース部２０は、車両前後方向に延びる底面部２１と、底面部２１の車幅方向両側部から車両上方側にそれぞれ延びる内側壁部２２および外側壁部２３と、を有し、内側壁部２２と外側壁部２３との間隔が、車体の側からフレーム本体部１０の側に近づくにつれて広がるように形成されている。内側壁部２２は、上辺部が下辺部よりも車幅方向内側に位置するとともに、上辺部と下辺部との間を繋ぐ傾斜面の車両上下方向の高さおよび車幅方向の幅がフレーム本体部１０の側に近づくほど増大するように形成されている。【選択図】図２