Front frame structure for electric vehicle
A front frame structure for an electric vehicle includes front side frames disposed in extra spaces between left and right side walls in a vehicle width direction of a motor room and side surfaces of a power control unit; a frame-shaped rigid member disposed in an extra space in a front portion of the motor room; left and right impact absorbing members coupled to a front surface of the frame-shaped rigid member at positions directly facing the front side frames; a bumper beam coupling the impact absorbing members; a lower frame disposed in a lower portion of the motor room; and upper reinforcements coupled to upper surfaces of the front side frames. Outer side surfaces in the vehicle width direction of the upper reinforcements gradually protrude outward in the vehicle width direction from front ends toward rear ends of the upper reinforcements in a front-rear direction of a vehicle body.
1. A front frame structure for an electric vehicle, the front frame structure comprising:
front side frames disposed respectively in extra spaces between left and right side walls in a vehicle width direction of a motor room and side surfaces of a power control unit of the electric vehicle;
a frame-shaped rigid member disposed in an extra space in a front portion of the motor room;
left and right impact absorbing members coupled to a front surface of the frame-shaped rigid member at positions directly facing the front side frames;
a bumper beam coupling the left and right impact absorbing members;
a lower frame disposed in a lower portion of the motor room, both sides in the vehicle width direction of the lower frame being supported by the front side frames, the power control unit comprising an electric motor being supported on a rear portion of the lower frame; and
upper reinforcements coupled to upper surfaces of the front side frames,
wherein outer side surfaces in the vehicle width direction of the upper reinforcements gradually protrude outward in the vehicle width direction from front ends toward rear ends of the upper reinforcements in a front-rear direction of a vehicle body of the electric vehicle.
2. The front frame structure for the electric vehicle according to claim 1 ,
wherein each of the front side frames has a wall shape having a dimension in a height direction from a bottom portion to an upper portion of the motor room, and
wherein a front portion of each of the front side frames comprises a fragile portion on which a stress load in an event of a frontal collision of the electric vehicle is concentrated.
3. The front frame structure for the electric vehicle according to claim 2 ,
wherein an upper portion of the frame-shaped rigid member is inclined rearward of the vehicle body.
4. The front frame structure for the electric vehicle according to claim 1 ,
wherein the frame-shaped rigid member comprises left and right vertical frames and cross members coupling upper portions and lower portions of both the vertical frames, and
wherein the front side frames, the left and right impact absorbing members, and front end surfaces of the upper reinforcements are coupled to the vertical frames.
5. The front frame structure for the electric vehicle according to claim 4 ,
wherein each of the vertical frames is a trapezoidal quadrangular prism having a wide base, and a lower portion of each of the vertical frames, on an outer side in the vehicle width direction, protrudes forward of a front wheel of the electric vehicle.
6. The front frame structure for the electric vehicle according to claim 5 ,
wherein an upper portion of the frame-shaped rigid member is inclined rearward of the vehicle body.
7. The front frame structure for the electric vehicle according to claim 4 ,
wherein an upper portion of the frame-shaped rigid member is inclined rearward of the vehicle body.
8. The front frame structure for the electric vehicle according to claim 1 ,
wherein an upper portion of the frame-shaped rigid member is inclined rearward of the vehicle body.