Front vehicle body structure

Patent metadata

Field	Value
Publication number	US-9988100-B2
Application number	US-201615192442-A
Country	US
Kind code	B2
Filing date	Jun 24, 2016
Priority date	Dec 14, 2015
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

A front vehicle body structure includes: lower side members extended in a length direction of a vehicle, and disposed at left and right sides in a width direction of the vehicle; a dash lower cross reinforcement member extended in the width direction of the vehicle, and to which a rear end of each of the front lower side members in the length direction of the vehicle is coupled; and joints to which the rear ends of the left and right front lower side members and the dash lower cross reinforcement member are coupled, which can result in enhanced structural rigidity of the vehicle front body.

First claim

What is claimed is:

1. A front vehicle body structure, comprising:
front lower side members extended in a length direction of a vehicle, and disposed at left and right sides in a width direction of the vehicle;
a dash lower cross reinforcement member extended in the width direction of the vehicle, and to which a rear end of each of the front lower side members in the length direction of the vehicle is coupled; and
joints to which the rear ends of the left and right front lower side members and the dash lower cross reinforcement member are coupled,
wherein one end of a rear side lower reinforcement member obliquely disposed in a length directional front side of the vehicle and a height directional upper side of the vehicle is coupled by being inserted to lateral ends of the dash lower cross reinforcement member in the width direction of the vehicle, and
wherein another end of the rear side lower reinforcement member is connected to a dash center cross reinforcement member extended in the width direction of the vehicle.

2. The front vehicle body structure of claim 1 , wherein reinforcement brackets are attached to corners where the front lower side members and the dash lower cross reinforcement member intersect.

3. The front vehicle body structure of claim 2 , wherein each of the reinforcement brackets is attached while filling a portion of the corner.

4. The front vehicle body structure of claim 2 , wherein each of the reinforcement brackets is formed in the shape of a triangular block.

5. The front vehicle body structure of claim 1 , wherein ends of the dash lower side members are coupled to lateral ends of the dash lower cross reinforcement member in the width direction of the vehicle, and
other ends of the dash lower side members are coupled to a side seal extended in the length direction of the vehicle.

6. The front vehicle body structure of claim 1 , wherein the dash lower cross reinforcement members have multiple cross-sections.

7. The front vehicle body structure of claim 6 , wherein the multiple cross-sections comprise:
a triangular-shaped first cross-section;
a pentagonal-shaped second cross-section sharing an oblique side of the first cross-section; and
a quadrangular-shaped third cross-section sharing the oblique side of the first cross-section and a bottom side of the second cross-section.

8. The front vehicle body structure of claim 1 , wherein the dash lower cross reinforcement member is extrusion-molded using a single extruded material.

9. The front vehicle body structure of claim 1 , wherein the joint includes:
a joint body formed as a quadrangular plate;
an upper flange bent inward in the width direction of the vehicle from an upper end edge of the joint body and thus coupled to an upper surface of the front lower side member in the height direction of the vehicle; and
a lower flange bent inward in the width direction of the vehicle from a lower end edge of the joint body and thus coupled to a bottom surface of the front lower side member in the height direction of the vehicle.

10. The front vehicle body structure of claim 9 , further comprising:
an upper extension flange disposed in an upper portion in the height direction of the vehicle by being further extended to a rear side from a rear side upper end edge of the joint body in the length direction of the vehicle; and
a lower extension flange disposed in a lower portion in the height direction of the vehicle by being further extended to a rear side from a rear side lower end edge of the joint body in the length direction of the vehicle,
wherein the dash lower cross reinforcement member is coupled by being inserted between the upper extension flange and the lower extension flange.

11. The front vehicle body structure of claim 9 , wherein two fastening bosses, each provided with a fastening hole, are formed by protruding in the joint body, and the two fastening bosses are disposed at a distance from each other in the length direction of the vehicle, and one end of a lower arm is coupled by being fastened to the fastening holes.

12. The front vehicle body structure of claim 11 , wherein a plurality of radial ribs are formed by integrally protruding in the joint body, and the plurality of radial ribs connect the two fastening bosses to each other and connect the respective fastening bosses to the joint body.

13. The front vehicle body structure of claim 10 , wherein an inclined surface inclined in the length direction of the vehicle and a lower side in the height direction of the vehicle is formed adjacent to the upper extension flange such that the rear side lower reinforcement member inclined in the front side of the length direction of the vehicle and the upper side of the height direction of the vehicle is coupled by being mounted to the inclined surface.

14. The front vehicle body structure of claim 7 , wherein the second cross-section of the dash lower cross reinforcement member is cut such that a coupling groove is formed, and
the rear side lower reinforcement member inclined in the front side of the length direction of the vehicle, and the upper side of the height direction of the vehicle is coupled by being inserted to the coupling groove.

15. The front vehicle body structure of claim 9 , wherein the joint body is provided with an expansion horizontal surface expanded as a triangle to the outer side in the width direction of the vehicle and a quadrangular-shaped expansion vertical surface extended upward in the height direction of the vehicle from one edge of the expansion horizontal surface.

16. The front vehicle body structure of claim 1 , wherein the dash center cross reinforcement member and the dash lower cross reinforcement member are connected to each other by two front tunnel side members.

17. The front vehicle body structure of claim 16 , wherein the two front tunnel side members extend with an inclination in the height direction of the vehicle and a front side in the length direction of the vehicle, and are disposed at a distance from each other along the width direction of the vehicle such that an entrance of a tunnel extended in a rear side along the length direction of the vehicle is formed.

18. The front vehicle body structure of claim 17 , wherein the dash lower cross reinforcement member crosses the tunnel and is made of a single extruded material.

19. The front vehicle body structure of claim 1 , wherein the dash lower cross reinforcement member, a rear upper cross reinforcement member disposed higher than the dash center cross reinforcement member in the height direction of the vehicle and extended in the width direction of the vehicle, a cowl cross upper member disposed higher than the rear upper cross reinforcement member and extended in the width direction of the vehicle, and front pillar members extended in the height direction of the vehicle and disposed in the left and right sides of the vehicle form a “ ” shaped truss structure.

Assignees

• Hyundai Motor Co Ltd

Inventors

• Kim Heeju
• Cha Mun Soo

Classifications

• B62D25/082

  Engine compartments · CPC title

• B62D27/023 Primary

  Assembly of structural joints · CPC title

• B62D25/08 Primary

  Front or rear portions {(sub-frames for mounting engine or suspensions B62D21/11)} · CPC title

• B62D21/02

  comprising longitudinally or transversely arranged frame members · CPC title