Abstract: A vehicle frame structure capable of achieving light weight, improving structural rigidity, and providing a good casting and forming effect is provided. The vehicle frame structure includes a pair of side portions and a connecting portion. The pair of side portions extends in a vehicle front-rear direction and is mounted on a vehicle body. The connecting portion is arranged as an elongated structure having a pair of long sides and is connected between the pair of side portions. The pair of side portions and the connecting portion are integrally formed by casting through injecting of molten metal from one side of the pair of long sides of the connecting portion. The connecting portion has a film surface connecting the pair of side portions and has a plurality of elongated holes extending radially from the center of the film surface towards the other side of the pair of long sides.

Abstract: A vehicle frame structure capable of achieving light weight, improving structural rigidity, and providing a good casting and forming effect is provided. The vehicle frame structure includes a pair of side portions and a connecting portion. The pair of side portions extends in a vehicle front-rear direction and is mounted on a vehicle body. The connecting portion is arranged as an elongated structure having a pair of long sides and is connected between the pair of side portions. The pair of side portions and the connecting portion are integrally formed by casting through injecting of molten metal from one side of the pair of long sides of the connecting portion. The connecting portion has a film surface connecting the pair of side portions and has a plurality of elongated holes extending radially from the center of the film surface towards the other side of the pair of long sides.

Abstract: The disclosure provides a vehicle frame structure capable of achieving light weight and cost reduction while maintaining good structural rigidity. A vehicle frame structure includes a side frame and a support frame. The side frame is disposed at a side portion of a vehicle and extends in a vehicle front-rear direction. The support frame is disposed below the side frame to support a suspension member and includes a body portion, an arm portion extending upwards from the body portion, and a fixing portion disposed on an upper end of the arm portion. The fixing portion of the support frame and a lower end of the side frame are fixed to each other via a fastening member extending in a vehicle up-down direction. The fixing portion has a slit formed towards the outside in a vehicle width direction from a through hole into which the fastening member is inserted.