LOWER ARM SUPPORTING BRACKET AND LOWER ARM SUPPORTING MECHANISM INCLUDING THE SAME

A first bracket supporting a first lower arm includes a front wall part and a rear wall part that face each other in a vehicle longitudinal direction. Respective insertion holes, through which a supporting bolt pivotably supporting the first lower arm is inserted, are formed in the front wall part and the rear wall part so as to face each other. Furthermore, the front wall part includes a fracturestarting point formed in a region on an outside, in a vehicle width direction, from a center position of the insertion hole. Consequently, it is possible to separate a front wheel from a vehicle bodyat the time of collision without providing any fragile part such as a cutout in the lower arm. 本发明提供种下臂支承托架及具备该托架的下臂支承机构。对第下臂进行支承的第托架具备在车辆前后方向上对向的前壁部及后壁部。在前壁部及后壁部，分别对向地形成有供将第下臂支承为能够转动的支承螺栓插入的插入孔。而且，在前壁部，在相对于插入孔的中心靠车辆宽度方向外侧的区域形成有断裂起点部。由此，不在下臂设置切口等脆弱部就能够在碰撞时使前轮脱离车体。