Front frame structure for electric vehicle
A front frame structure for an electric vehicle includes a front side frame having a wall-shaped portion having a wall shape with a dimension in a height direction from a bottom portion to an upper portion of a motor room, and an arm-shaped portion protruding from an upper portion of a front end portion of the wall-shaped portion; and a sub-frame joined to a bottom portion of the wall-shaped portion and a front end portion of the arm-shaped portion and having an annular opening between the sub-frame and the arm-shaped portion. An inner peripheral surface of the annular opening includes a first inclined surface disposed on a bottom surface of a rear portion of the arm-shaped portion and a second inclined surface disposed on an upper surface of a front portion of the sub-frame. The first and second inclined surfaces are inclined forward at elevation angles equal to each other.
1 . A front frame structure for an electric vehicle, the front frame structure comprising:
a front side frame having a wall-shaped portion that has a wall shape with a dimension, in a height direction, that extends from a bottom portion to an upper portion of a motor room of the electric vehicle and that extends in a front-rear direction of a vehicle body of the electric vehicle in a rear region of the motor room, and an arm-shaped portion that protrudes from an upper portion of a front end portion of the wall-shaped portion and that extends in the front-rear direction of the vehicle body in a front region of the motor room; and
a sub-frame that is joined to a bottom portion of the wall-shaped portion and a front end portion of the arm-shaped portion and that has an opening penetrating in a vehicle-width direction between the sub-frame and the arm-shaped portion,
wherein an inner peripheral surface of the opening comprises a first inclined surface disposed on a bottom surface of a rear portion of the arm-shaped portion and a second inclined surface disposed on an upper surface of a front portion of the sub-frame, and
wherein the first inclined surface and the second inclined surface are inclined forward at elevation angles that are equal to each other.
2 . The front frame structure for the electric vehicle according to claim 1 , wherein an upper portion of a rear end portion of the wall-shaped portion is joined to a front pillar of the vehicle body.
3 . The front frame structure for the electric vehicle according to claim 1 , wherein a lower portion of a rear end portion of the wall-shaped portion is joined to a side sill via a torque box of the vehicle body.
4 . The front frame structure for the electric vehicle according to claim 1 , wherein the wall-shaped portion constitutes a portion of a suspension tower of the vehicle body.
5 . The front frame structure for the electric vehicle according to claim 1 , wherein the sub-frame constitutes a cradle configured to support a power unit that is accommodated in the motor room.