JP6080218B2 - Auto body structure - Google Patents

Description

  The present invention relates to a vehicle body structure for an automobile that constitutes an upper member integrally including a front pillar upper and a roof side rail by a metal hollow tube having a constant cross section in the longitudinal direction.

  Upper part of FRP lower vehicle body, which is integrated with metal parts embedded in the lower part of FRP upper vehicle body, which is integrated with front pillar upper, roof side rail, rear pillar, roof arch, etc., and floor, side sill, dash panel lower, etc. Japanese Patent Application Laid-Open Publication No. 2004-228707 discloses a method for assembling a vehicle body by fastening a metal member embedded in the metal body.

JP 2012-162098 A

  By the way, when a collision load of frontal collision is input to the FRP vehicle body, a large bending load acts on a portion where the upper end of the front pillar upper is continuous with the front end of the roof side rail, but the FRP member is strong against the tensile load. However, since it is weak against a compressive load, there is a possibility that breakage may occur on the lower surface of the front pillar upper where a large compressive load acts due to bending deformation.

  The present invention has been made in view of the above circumstances, and an object thereof is to increase the strength of an upper member in which a front pillar upper and a roof side rail are integrated.

In order to achieve the above object, according to the first aspect of the present invention, there is provided an automobile comprising an upper member integrally including a front pillar upper and a roof side rail made of a metal hollow tube having a constant cross section in the longitudinal direction. It is a vehicle body structure, and the upper member includes a main body portion having a polygonal cross section and a reinforcing portion having a smaller cross section than the main body portion continuous with the lower surface of the main body portion, and the joint member supporting the upper member is A groove portion into which the reinforcing portion is fitted, and two first joint surfaces continuous on both sides of the groove portion, and the two second joint surfaces of the main body portion are in contact with the two first joint surfaces. A vehicle body structure characterized by being joined is proposed .

According to a second aspect of the present invention, in addition to the configuration of the first aspect, a vehicle body structure for an automobile is proposed in which the reinforcing portion has a triangular cross section.

According to the invention described in claim 3 , in addition to the structure of claim 1 or 2 , a body structure of an automobile is proposed in which the main body has a hexagonal cross section.

According to the invention described in claim 4 , in addition to the structure of any one of claims 1 to 3 , the joint member abuts against the upper wall of the front pillar lower or the upper wall of the rear pillar. A vehicle body structure is proposed in which the front and rear positions are adjustable with bolts through a long hole, and the rear body of the front pillar lower or the front surface of the rear pillar is abutted and bonded.

According to the fifth aspect of the present invention, in addition to the configuration of the fourth aspect , the joint member extends in the substantially front-rear direction to support the upper member, and extends in the substantially vertical direction. And a pillar adhesive portion bonded to the rear surface of the front pillar lower or the front surface of the rear pillar. The adhesive surface of the pillar adhesive portion has a lower end inclined inward in the front-rear direction, An automobile body structure is proposed in which the upper end side of the bonding surface of the pillar lower or the rear pillar is inclined outward in the front-rear direction.

  The front joint member 61 and the rear joint member 64 in the embodiment correspond to the joint member of the present invention.

According to the configuration of the first aspect, the upper member integrally including the front pillar upper and the roof side rail is formed of a metal hollow tube having a constant cross section in the longitudinal direction. Since the upper member includes a main body portion having a polygonal cross section and a reinforcing portion having a smaller cross section than the main body portion continuous with the lower surface of the main body portion, when a low load is applied to the upper member due to a collision load of a frontal collision The reinforcement part located inside the bending direction efficiently supports the compressive load, so that the bending strength of the upper member can be increased, and when a high load is applied, the main body part of the polygonal cross section extends vertically in the ridgeline. It can be crushed and absorb the load. Moreover, the joint member that supports the upper member includes a groove portion into which the reinforcing portion is fitted, and two first joint surfaces that are continuous on both sides of the groove portion, and the two second joint surfaces of the main body portion are two first joints. Since the joint is made in contact with the surface, the upper member can be easily positioned with respect to the upper member by fitting the reinforcing portion and the groove portion, and the first joint surface and the second joint surface are brought into close contact with each other. The member and the upper member can be firmly joined.

According to the configuration of the second aspect , since the reinforcing portion has a triangular cross section, the work of fitting the reinforcing portion into the groove portion of the joint member is facilitated.

According to the third aspect of the present invention, since the main body has a hexagonal cross section, the roof panel and the door can be placed along the flat surface.

According to the configuration of the fourth aspect , the joint member is fastened with a bolt so as to be adjustable in the front-rear position through a long hole in contact with the upper surface of the front pillar lower or the upper surface of the rear pillar, and the rear surface of the front pillar lower or Since it is in contact with the front of the rear pillar and bonded, it absorbs the variation in the distance between the front pillar lower and the rear pillar and the variation in the length of the upper member to improve the assemblability, and the bolt when a longitudinal load is input Can slide along the long holes to exhibit shock absorbing performance.

According to the fifth aspect of the present invention, the joint member is bonded to the upper member support portion that extends substantially in the front-rear direction and supports the upper member and the rear surface of the front pillar lower or the front surface of the rear pillar. Since it is a T-shaped member provided with a pillar adhesive part, not only can the upper member be firmly supported by the upper member support part, but the lower end side of the adhesive surface of the pillar adhesive part is inclined inward in the front-rear direction. The front pillar lower or rear pillar has an adhesive surface with its upper end inclined to the outside in the front-rear direction. When a downward load is applied from the upper member to the joint member, the load is efficiently transferred from the joint member to the front pillar lower or rear pillar. Can be transmitted and supported.

The perspective view seen from the diagonal front of the body frame of a car. The perspective view seen from the slanting back of the body frame of a car. FIG. 3 is a three-direction arrow view of FIG. 1. 4A direction view and 4B direction arrow view of FIG. FIG. 5 is an enlarged view of part 5 of FIG. 2. FIG. 6 is an enlarged view of 6 parts in FIG. 2. FIG. 7 is a view in the direction of arrow 7 in FIG. 5. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the present specification, the front-rear direction, the left-right direction (vehicle width direction), and the up-down direction are defined with reference to an occupant seated in the driver's seat.

  As shown in FIGS. 1 to 4, an automobile body frame mainly made of CFRP (carbon fiber reinforced resin) includes a body floor 11 and a pair of left and right sides extending in the front-rear direction along the left and right sides of the body floor 11. Side sills 12, 12; a pair of left and right front pillars 13 and 13 standing up front from the front ends of the left and right side sills 12, 12, and a pair of left and right rear pillars rising up from the rear ends of the left and right side sills 12, 12. 14, 14 and a pair of left and right center pillars 15 and 15 rising upward from the middle part in the front-rear direction of the left and right side sills 12 and 12, and the left and right center pillars 15 and 15 from the upper ends of the left and right front pillar lowers 13 and 13. A pair of left and right upper members 16, 16 extending to the upper ends of the left and right rear pillars 14, 14 via the upper ends are provided. The upper half of the upper member 16 constitutes the front pillar upper 16a, and the rear half constitutes the roof side rail 16b. The upper ends of the left and right center pillars 15 and 15 are joined by the roof arch 24.

  A flat dash panel lower 17 is joined to the front end of the vehicle body floor 11 and the front surfaces of the left and right front pillar lowers 13, 13, and a flat plate rear portion is connected to the rear end of the vehicle body floor 11 and the rear surfaces of the left and right rear pillars 14, 14. The partition wall 18 is joined, and the rear pershell 19 extends horizontally from the rear end of the rear partition wall 18. A pair of left and right aluminum alloy mounting bases 20, 20 are fixed to the front end of the vehicle body floor 11, and the rear ends of a pair of left and right aluminum alloy front side frames 21, 21 are fixed to the front ends of the mounting bases 20, 20. .

  A pair of left and right rear side frames 22, 22 extend rearward from the rear end of the lower wall of the vehicle body floor 11, and the rear pillars 14, 14 and the rear side frames 22, 22 are joined by a pair of left and right rear wheel house inners 23, 23. . The rear end of the upper wall of the vehicle body floor 11 ends at the position of the rear partition wall 18, and a rear floor 44, which is a member different from the upper wall of the vehicle body floor 11, is disposed behind the rear partition wall 18. Rear side frames 22, 22 having a closed cross section are constituted by the lower wall of the vehicle body floor 11 extending rearward and the rear floor 44. A luggage compartment 45 is defined above the rear floor 44.

  As shown in FIGS. 2, 3, 5, and 7, the upper member 16 in which the front pillar upper 16 a and the roof side rail 16 b are integrated is composed of an extruded material of an aluminum alloy having a constant cross section in the longitudinal direction. The cross-sectional shape includes a hexagonal main body portion 59 and a triangular reinforcing portion 60 protruding downward from one side of the lower side of the main body portion 59. The main body 59 includes a pair of second joint surfaces 59a and 59a that are continuous on both sides of the reinforcing portion 60, and the pair of second joint surfaces 59a and 59a expand upward in a V shape.

  The front end portion of the front pillar upper 16a constituting the front half portion of the upper member 16 is fixed to the upper wall 13a of the front pillar lower 13 via a front joint member 61 made of aluminum alloy. The front joint member 61 is a T-shaped member in a side view including an upper member support portion 61a extending substantially in the front-rear direction and a pillar bonding portion 61b extending substantially downward from the lower surface of the upper member support portion 61a. On the upper surface of the member support portion 61a, there are a groove portion 61c made of a groove having a square cross section extending in the front-rear direction, and a pair of first joint surfaces 61d and 61d that expand in a V shape upward from the opening end of the groove portion 61c. It is formed.

  At the front end of the front pillar upper 16 a, the reinforcing portion 60 is fitted into the groove portion 61 c of the front joint member 61 from above, and the pair of second joint surfaces 59 a and 59 a of the main body portion 59 are a pair of the front joint member 61. The first joint surfaces 61d and 61d are joined by MIG welding W in a state of being in close contact with each other.

  A pair of left and right elongated holes 61e and 61e extending in the front-rear direction penetrates the front end portion of the upper member support portion 61a of the front joint member 61 in the vertical direction, and the upper ends of the elongated holes 61e and 61e are The large-diameter recesses 61f and 61f are also formed. On the other hand, two nuts 62 and 62 are embedded in the upper wall 13a of the front pillar lower 13 with which the front end portion of the upper member support portion 61a of the front joint member 61 abuts, and penetrates the long holes 61e and 61e. The front joint member 61 is fastened to the front pillar lower 13 by the two bolts 63, 63 being screwed into the nuts 62, 62. At this time, the heads of the bolts 63 and 63 are accommodated in the recesses 61f and 61f of the front joint member 61 so as not to protrude to the outside.

  The pillar bonding portion 61b of the front joint member 61 is tapered so that the width in the front-rear direction decreases downward, and the bonding surface 61g that forms the front surface thereof is the bonding surface 13b that forms the rear surface of the front pillar lower 13. Joined by adhesive G. At this time, both adhesion surfaces 61g and 13b are inclined from the front upper side to the rear lower side in a side view.

  As shown in FIGS. 2, 3, 6, and 8, the rear end portion of the roof side rail 16 b constituting the rear half portion of the upper member 16 is connected to the upper wall 14 a of the rear pillar 14 and the rear joint member 64 made of aluminum alloy. Fixed through. The structure of the rear joint member 64 itself and the structure for fixing it to the upper wall 14a of the rear pillar 14 and the roof side rail 16b are the same as the structure of the front joint member 61 itself already described and the structure of the front pillar lower 13 above. Since it is substantially the same as the structure fixed to the wall 13a and the front pillar upper 16a, the overlapping description is omitted.

  The upper member support portion 61a, the pillar bonding portion 61b, the groove portion 61c, the first joint surface 61d, the long hole 61e, the recess portion 61f, and the bonding surface 61g of the front joint member 61 are respectively the upper member support portion of the rear joint member 64. 64a, the pillar bonding portion 64b, the groove portion 64c, the first joint surface 64d, the long hole 64e, the concave portion 64f, and the bonding surface 64, and the upper wall 13a and the bonding surface 13b of the front pillar lower 13 are the upper wall of the rear pillar 14, respectively. 14a and adhesive surface 14b.

  Next, the operation of the embodiment of the present invention having the above configuration will be described.

  When the collision load of the frontal collision is input to the front pillar lower 13, the collision load is transmitted to the front pillar upper 16a via the front joint member 61, but the upper part where the front pillar upper 16a and the roof side rail 16b are integrated. Since the member 16 is convexly curved upward, the upper member 16 is further deformed by a collision load, and a strong tensile load acts on the upper surface at the rear part of the front pillar upper 16a, which is particularly large in deformation. A strong compressive load is applied.

  If the upper member 16 is made of CFRP which is weak against a compressive load, the upper member 16 may be broken from the lower surface on which the compressive load acts. In the present embodiment, the upper member 16 is a hollow made of an aluminum alloy extruded material. Since the reinforcing portion 60 is provided on the lower surface of the main body portion 59, the compressive load is effectively supported by the reinforcing portion 60 and the upper member 16 can be prevented from being broken. When a larger collision load is input, as shown by a chain line in the circle of FIG. 2, the hexagonal cross-section main body 59 is crushed vertically by a pair of ridge lines a and a that are separated in the vehicle width direction. Can absorb collision energy.

  Further, when the front end of the front pillar upper 16a of the upper member 16 is joined to the front joint member 61, the front joint member 61 includes a groove portion 61c into which the reinforcing portion 60 of the front pillar upper 16a is fitted, and both sides of the groove portion 61c. The two first joining surfaces 61d and 61d that are continuous with each other, and the two second joining surfaces 59a and 59a of the main body 59 are in contact with the two first joining surfaces 61d and 61d and are welded W. The front pillar upper 16a can be easily positioned with respect to the front joint member 61 by fitting the portion 60 and the groove portion 61c, and the first joint surfaces 61d and 61d and the second joint surfaces 59a and 59a are brought into close contact with each other. Thus, the front joint member 61 and the front pillar upper 16a can be firmly welded W.

  In particular, since the reinforcing portion 60 has a triangular cross section pointed downward, when the reinforcing portion 60 is fitted in the groove portion 61c of the front joint member 61, the workability is improved because the reinforcing portion 60 serves as a guide. To do. Since the main body 59 has a hexagonal cross section, the roof panel 65 and the door 66 can be placed along the flat surface of the main body 59 as shown in the circle of FIG.

  Further, there is a manufacturing dimensional error in the distance between the upper end of the front pillar lower 13 and the upper end of the rear pillar 14, and the length of the upper member 16 also has a manufacturing dimensional error. When the front joint member 61 is fastened to the upper wall 13a of the front pillar lower 13 with bolts 63, 63, the front and rear positions of the front joint member 61 can be adjusted within the range of the long holes 61e, 61e. Assembling can be improved by absorbing dimensional errors. Moreover, when the collision load of the frontal collision is input, the bolts 63, 63 slide along the long holes 61e, 61e, so that the shock absorbing performance can be exhibited.

  In the foregoing, the structure and operation of the joint portion of the front joint member 61, the front pillar upper 16a, and the front pillar lower 13 have been described. However, the structure and operation of the joint portion of the rear joint member 64, the roof side rail 16b, and the rear pillar 14 are described. Is the same.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, the cross-sectional shape of the main body 59 of the upper member 16 is not limited to a hexagon, and the cross-sectional shape of the reinforcing portion 60 is not limited to a triangle.

13 Front pillar lower 13a Upper wall 13b Adhesion surface 14 Rear pillar 14a Upper wall 14b Adhesion surface 16 Upper member 16a Front pillar upper 16b Roof side rail 59 Main body portion 59a Second joint surface 60 Reinforcement portion 61 Front joint member (joint member)
61a Upper member support portion 61b Pillar adhesion portion 61c Groove portion 61d First joint surface 61e Long hole 61g Adhesion surface 63 Bolt 64 Rear joint member (joint member)
64a Upper member support portion 64b Pillar adhesive portion 64c Groove portion 64d First joint surface 64e Long hole 64g Adhesive surface

Claims (5)

A vehicle body structure for an automobile that constitutes an upper member (16) integrally including a front pillar upper (16a) and a roof side rail (16b) with a metal hollow tube having a constant cross section in the longitudinal direction,
The upper member (16) includes a main body part (59) having a polygonal cross section and a reinforcing part (60) having a smaller cross section than the main body part (59) continuous with the lower surface of the main body part (59) , The joint members (61, 64) that support the upper member (16) include two groove portions (61c, 64c) into which the reinforcing portion (60) is fitted and two continuous portions on both sides of the groove portions (61c, 64c). A first joint surface (61d, 64d), and the two second joint surfaces (59a) of the main body (59) are in contact with and joined to the two first joint surfaces (61d, 64d). The body structure of an automobile . Wherein the front Symbol reinforcing portion (60) is a triangular cross section, a vehicle body structure for an automobile according to claim 1. Wherein the front SL body portion (59) is a hexagonal cross section, a vehicle body structure for an automobile according to claim 1 or claim 2. Before Symbol joint member (61, 64) includes a front pillar lower (13) of the upper wall (13a) or the rear pillar (14) of the top wall in contact with the (14a) elongate hole (61e, 64e) located back and forth through the 4. The control device according to claim 1 , wherein the bolt is adjustably fastened by a bolt and is bonded to a rear surface of the front pillar lower or a front surface of the rear pillar. The vehicle body structure according to any one of the above. Before Symbol joint member (61, 64), the upper member supporting part for supporting the upper member (16) extending substantially in the longitudinal direction (61a, 64a) and the lower front pillar extending in a substantially vertical direction (13) A pillar-shaped member (61b, 64b) bonded to the rear surface or the front surface of the rear pillar (14), and the bonding surface (61g, 64g) of the pillar bonded portion (61b, 64b). lower end with inclined in the longitudinal direction inside the bonded surface of the lower front pillar (13) or said rear pillar (14) (13b, 14b) is characterized in that the upper side is inclined in the longitudinal direction outside, claim 4 The vehicle body structure described in 1.

Images