Front body reinforcement structure

1. A front body reinforcement structure of a vehicle, comprising:

a front side member connected to a dash panel;

a front pillar disposed in height direction of a vehicle body, and including a lower part connected to the front side member;

a front side upper member configured to connect a front part of the front side member and an upper part of the front pillar; and

a reinforcement unit connected with the dash panel and configured to connect a rear part of the front side member and an upper portion of the front pillar,

wherein an electro deposition drain hole is formed in a lower part of the reinforcement unit.

2. The front body reinforcement structure of claim 1 , wherein:

the front part of the front side member, the front side upper member and the reinforcement unit are configured to form a first connection structure with a rhombus shape, and

the rear part of the front side member, the reinforcement unit and the front pillar are configured to form a second connection structure with a rhombus shape.

3. The front body reinforcement structure of claim 1 , wherein the reinforcement unit comprises:

a reinforcement body portion is configured to protrude in a front direction of the vehicle body;

a reinforcement side portion is configured to be bent from the reinforcement body portion; and

a reinforcement flange portion is configured to be bent at the reinforcement side portion and joined to the dash panel.

4. The front body reinforcement structure of claim 3 , further comprising a front shock absorber housing panel connected to the front side member,

wherein a rear end of the front shock absorber housing panel is joined to the reinforcement body portion.

5. The front body reinforcement structure of claim 3 , wherein the front side member further includes a front side member side surface configured to be bent at a front side member upper surface,

wherein the front side member upper surface is connected to the reinforcement body portion, and the front side member side surface is connected to the reinforcement side portion.

6. The front body reinforcement structure of claim 5 , wherein the front side member upper surface includes an end surface having a curved end,

wherein the end surface is connected to the reinforcement body portion.

7. The front body reinforcement structure of claim 5 , wherein the reinforcement unit includes an upper body and a lower body,

wherein the upper body and the lower body are overlapped and connected, and the overlapped part is configured to support the front side member upper surface.

8. The front body reinforcement structure of claim 5 , further comprising a bulk head provided inside the reinforcement unit configured to support the front side member upper surface.

9. The front body reinforcement structure of claim 3 , wherein the reinforcement unit further includes an upper reinforcement flange portion formed to be bent to join the upper portion of the front pillar.

10. The front body reinforcement structure of claim 3 , further comprising a front side member inner rear gusset provided at a rear part of the reinforcement unit,

wherein a notch is formed in the reinforcement unit to support the front side member inner rear gusset.

11. The front body reinforcement structure of claim 3 , wherein a strength bead is formed in the reinforcement unit.

12. The front body reinforcement structure of claim 3 , wherein an electro deposition drain bead is formed at a bottom of the reinforcement unit.

13. The front body reinforcement structure of claim 1 , wherein a connection portion between the front pillar and the reinforcement unit is formed lower than a connection portion between the front side upper member and the front pillar.