Vehicle front body structure
A vehicle front body structure includes a pair of damper housings, a pair of damper bases, and a dashboard upper. Each of the damper bases includes a damper base upper wall, three damper fixing portions, three dash upper fixing portion, and a ridge line portion extending along the outer circumference of the damper base upper wall. The three damper fixing portions and the three dash upper fixing portions are alternately disposed on an imaginary circle. Sections of the ridge line portion outside each of the dash upper fixing portions and each of the dash upper fixing portion are located outside the imaginary circle, and each of sections of the ridge line portion between the damper fixing portion and the dash upper fixing portion intersects the imaginary circle so that the ridge line portion is formed in a substantially star shape in plan view.
1. A vehicle front body structure comprising:
a pair of damper housings forming right and left side walls of a power unit room of a vehicle, each of the pair of damper housings containing a damper;
right and left damper bases, each disposed on an upper portion of corresponding one of the pair of damper housings for fixing the damper thereto; and
a dashboard upper forming an upper portion of a dashboard separating the power unit room from a vehicle compartment, the dashboard upper including a dash-upper front portion extending, in a front direction of the vehicle, up to at least a position immediately above the right and left damper bases, each of right and left end portions of the dash-upper front portion in the vehicle width direction being fixed to a corresponding one of the right and left damper bases,
wherein each of the right and left damper bases includes a damper base upper wall for attaching the damper thereto, a side wall portion, three damper fixing portions disposed on the damper base upper wall to fix the damper to the damper base upper wall, three dash upper fixing portions disposed on the damper base upper wall to fix the dash-upper front portion to the damper base upper wall,
wherein the damper base upper wall is connected to the side wall portion so as to have a ridge line portion at a boundary between the damper base upper wall and the side wall portion such that the ridge line portion extends along a circumference of the damper base upper wall,
wherein the three damper fixing portions and the three dash upper fixing portions are alternately positioned on a single imaginary circular line superimposed on an upper surface of the damper base upper wall such that imaginary lines extending between every pair of the three damper fixing portions form a first substantially regular triangle, and imaginary lines extending between every pair of the three dash upper fixing portions form a second substantially regular triangle, and
wherein the damper base upper wall has a substantially wave shape having a trough of the wave shape located between one of the three damper fixing portions and an adjacent dash upper fixing portion such that a section of the ridge line portion between the one of the three damper fixing portions and the adjacent dash upper fixing portion is recessed inward to intersect the single imaginary circular line and a section of the ridge line portion surrounding the damper fixing portions and a section of the ridge line portion surrounding the dash upper fixing portions are located outside the single imaginary circular line.
2. The vehicle front body structure according to claim 1 , wherein the damper base further includes a plurality of housing connecting portions disposed on a circumferential edge at the lower end of the side wall portion of the damper base, and a notch portion between a pair of adjacent housing connecting portions.
3. The vehicle front body structure according to claim 2 , wherein the notch portion extends from a lower edge of the side wall portion to at least an imaginary connection line passing through centers of the plurality of housing connecting portions.
4. The vehicle front body structure according to claim 1 , wherein the damper base further includes a plurality of housing connecting portions disposed on a circumferential edge at the lower end of the side wall portion of the damper base, and a recessed bead that extends in an up-down direction between a pair of adjacent housing connecting portions so as to space apart the side wall portion of the damper base from the damper housing.
5. The vehicle front body structure according to claim 1 , further comprising:
a pair of right and left upper members extending in a front-rear direction of the vehicle on right and left sides of the power unit room; and
a stiffener disposed on top of the dash-upper front portion attached to the damper base upper wall, the stiffener extending between the pair of damper housings together with the dash-upper front portion;
wherein right and left end portions of the stiffener are fixed to the right and left upper members, respectively.
6. The vehicle front body structure according to claim 1 , further comprising:
a pair of right and left upper members extending in a front-rear direction of the vehicle on right and left sides of the power unit room; and
a stiffener disposed on top of the dash-upper front portion attached to the damper base upper wall, the stiffener extending between the pair of damper housings together with the dash-upper front portion;
wherein the stiffener includes a bulging portion bulging in an upward direction of the vehicle and forming a closed cross-section between the stiffener and the dash-upper front portion, and the bulging portion extends in the right-left direction up to positions immediately above the right and left upper members.
7. The vehicle front body structure according to claim 1 , wherein the damper base upper wall has a substantially six-pointed star shape.