JP6099207B2 - Auto body structure - Google Patents

Description

  The present invention relates to an automobile body structure in which a roof panel is fixed to an upper frame in which an A-pillar upper and a roof side rail are integrally continuous.

  Patent Document 1 below discloses a resin-made upper vehicle body having a hollow closed cross section formed by joining an inner panel and an outer panel, and a reinforcing frame made of steel pipe disposed therein and the upper vehicle body are joined by a rivet. Is known.

  Further, a vehicle body of an automobile is configured by connecting an inner panel and an outer panel to have a hollow closed cross section, and a steel pipe disposed inside the vehicle body and the vehicle body are connected via a separate bracket, as disclosed in Patent Document 2 below. It is.

Japanese Unexamined Patent Publication No. 01-103586 JP 2002-87322 A

  By the way, the thing described in the above-mentioned patent document 1 has a problem that the vehicle body rigidity depends only on the reinforcing frame made of steel pipe, so that the cross section of the steel pipe cannot be reduced, and the weight of the vehicle body increases accordingly.

  Moreover, since the thing described in the said patent document 2 connects a vehicle body and a steel pipe via a separate bracket, not only does the weight of the vehicle body increase by the amount of the bracket, but the separate bracket also includes the vehicle body and the steel pipe. Since the inner panel and the outer panel do not contribute to the improvement of the rigidity of the vehicle body, there is a problem that it is necessary to increase the cross section of the steel pipe in order to ensure the necessary rigidity.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to join a roof panel lightly and firmly without being affected by the dimensional accuracy of the upper frame constituting the roof side rail.

To achieve the above object, according to the first aspect of the present invention, a steel pipe is integrally bent by three-dimensional bending to form an upper frame in which an A pillar upper and a roof side rail are continuously integrated. Then, the outer end of the roof panel in the vehicle width direction is bent downward and outward in the vehicle width to form a first step portion including a vertical wall and a horizontal wall, and the horizontal wall of the first step portion is formed on the upper surface of the roof side rail. A contact portion for line contact or surface contact is formed and joined, and an upper joining flange formed on the upper end of the side outer panel is brought into contact with and joined to the upper surface of the lateral wall of the first step portion , An inner member having a windshield fixing flange that supports an outer end in the vehicle width direction is fixed to the A pillar upper, and a front roof arch is fixed to an upper portion of the windshield fixing flange. Body structure of a motor vehicle, characterized in that integrally formed is proposed.

According to the invention described in claim 2, in addition to the structure of claim 1 , a lower joint flange is formed at the lower end of the side outer panel, an outer member is fixed to the A pillar upper, and the lower joint flange A vehicle body structure for an automobile is proposed in which a connecting portion where the outer member and the inner member are overlapped is used as a door-rim fixing flange .

Incidentally, the welding W 1 of the embodiment corresponds to the joint of the present invention.

According to the configuration of the first aspect, the steel pipe is integrally bent by three-dimensional bending to form the upper frame in which the A pillar upper and the roof side rail are integrally integrated. The required strength can be ensured while reducing the weight. Also, the outer end of the roof panel in the vehicle width direction is bent downward and outward in the vehicle width direction to form a first step portion including a vertical wall and a horizontal wall, and the horizontal wall of the first step portion is in line contact with the upper surface of the roof side rail or Since the contact portion to be brought into surface contact is formed and the contact portion is joined, and the upper joint flange formed at the upper end of the side outer panel is brought into contact with the upper surface of the lateral wall of the first step portion, the joint is joined. Even if the accuracy decreases and the position shifts in the vehicle width direction, the contact part is joined by securing line contact or surface contact with the top surface of the roof side rail of the lateral wall of the first step portion of the roof panel, and the accuracy of the upper frame It is possible to join firmly without being influenced by. In addition, since the roof panel is directly welded to the upper frame, the joining bracket, which has been necessary in the past, is no longer required and the cost can be reduced, and the rigidity of the connection portion between the upper frame and the roof panel is improved. Moreover, the inner member having the windshield fixing flange that supports the outer end of the windshield in the vehicle width direction is fixed to the A pillar upper, and the front roof arch fixing portion is integrally formed on the upper part of the windshield fixing flange. The support rigidity of both side edges and the upper edge in the vehicle width direction is increased, and unpleasant vibration of the windshield is suppressed.

According to the second aspect of the present invention , the lower joining flange is formed at the lower end of the side outer panel, the outer member is fixed to the A-pillar upper, and the connecting portion where the lower joining flange, the outer member and the inner member are overlapped is fixed to the door rim. Since the flange for use is a door, the flange for fixing the door rim is made up of three sheets of plate material to increase the strength.

The perspective view of the vehicle body side part frame of a motor vehicle. (First embodiment) FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG. 1. (First embodiment) FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 1. (First embodiment) FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. (First embodiment) FIG. 5 is an enlarged sectional view taken along line 5-5 in FIG. (First embodiment) The figure corresponding to FIG. (Second Embodiment) The figure corresponding to FIG. (Third embodiment)

First embodiment

  Hereinafter, a first embodiment 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 FIG. 1, a vehicle body side frame 11 of an automobile includes an upper frame 14 made of a steel tube having a circular cross section, in which a roof side rail 12 and an A pillar upper rear portion 13 are integrated. The upper frame 14 is configured by bending a straight steel pipe into a predetermined shape by three-dimensional bending. Connected to the front end of the A-pillar upper rear portion 13 is an A-pillar upper front portion 15 that is formed by welding a pressed steel plate to form a hollow closed cross section. The A-pillar upper rear portion 13 and the A-pillar upper front portion 15 are connected to A. A pillar upper 16 is configured.

  A side sill 18 having a hollow closed cross section formed by welding a pressed steel plate is disposed below the upper frame 14, and the A pillar upper front portion 15 and the front end of the side sill 18 are formed in a Y shape. The pillar lower 17 is connected in the vertical direction, the middle part in the longitudinal direction of the roof side rail 12 and the middle part in the longitudinal direction of the side sill 18 are connected in the vertical direction by the B pillar 19 and the C pillar 20, The rear end of the side sill 18 is connected in the vertical direction by a D pillar 20 '.

  The A pillar lower 17 is formed by welding a pressed steel plate and integrally welding an upper portion 17a and a lower portion 17b configured to have a hollow closed cross section. The upper end of the upper portion 17a is welded to the A pillar upper 16 via a gusset 21. The lower end of the lower portion 17 b is welded to the side sill 18 through the gusset 22. The B pillar 19 is formed by welding a pressed steel plate to have a hollow closed cross section, and the upper end is welded to the roof side rail 12 via a gusset 23 and the lower end is welded to the side sill 18 via a gusset 24. The upper end of the C pillar 20 is welded to the roof side rail 12 via the gusset 25, and the lower end is welded to the side sill 18 via the gusset 26. The upper end of the D pillar 20 ′ is welded to the roof side rail 12 via the gusset 27, and the lower end is welded to the side sill 18 via the gusset 28. These gussets 21 to 28 connect the A pillar lower 17, the B pillar 19, the C pillar 20 and the D pillar 20 ′ to the upper frame 14 and the side sill 18.

  A side outer panel 29 having a front door opening 29a and a rear door opening 29b is fixed to the outer surface of the vehicle body side frame 11 in the vehicle width direction. The front ends of the left and right roof side rails 12 and 12 are connected by a front roof arch 30 extending in the vehicle width direction, and the outer peripheral portion of the roof panel 31 is connected to the left and right roof side rails 12 and 12 and the front roof arch 30. The outer periphery of the windshield 32 is connected to the left and right A-pillar uppers 16 and 16 and the front roof arch 30.

  As shown in FIGS. 1 and 2, the outer end of the roof panel 31 in the vehicle width direction is composed of a vertical wall 31 a bent downward and a horizontal wall 31 b bent at the lower end of the vertical wall 31 a outward in the vehicle width direction. A first step portion 31c is formed, and the horizontal wall 31b is in line contact with the upper surface of the roof side rail 12 and laser-welded W1 in the longitudinal direction (front-rear direction). At the upper end of the side outer panel 29, there is formed a second step portion 29e comprising a vertical wall 29c bent downward and an upper joint flange 29d bent inward in the vehicle width direction of the lower end of the vertical wall 29c. The joining flange 29d comes into contact with the upper surface of the lateral wall 31b of the roof panel 31 and is spot welded W2. The molding 39 is mounted in the groove formed by the first step portion 31c and the second step portion 29e. Further, the upper end of the stay 33 is welded W4 to the lower surface of the roof side rail 12, and the lower joint flange 29f obtained by bending the lower end of the side outer panel 29 downward and the lower end of the stay 33 are welded W3. The lower joint flange 29f and the lower end of the stay 33, which are stacked in this way, constitute a door-drim fixing flange 34.

  As shown in FIGS. 1, 3, and 4, the front roof arch 30 is fixed to the front end of the roof side rail 12 via an inner member 35 and a roof arch fixing bracket 36. The inner member 35 includes a partially cylindrical upper frame connecting portion 35a that is welded W5 so as to straddle the lower surface of the roof side rail 12 and the A pillar upper rear portion 13 of the upper frame 14, and the longitudinal direction of the upper frame connecting portion 35a. A front roof arch fixing portion 35b extending inward in the vehicle width direction from the intermediate portion and a flange portion 35c extending downward from the lower end of the upper frame connecting portion 35a are provided. The front roof arch fixing portion 35b is formed in a U-shaped cross section that opens upward, and an outer end in the vehicle width direction of the front roof arch 30 is fitted and welded from above, and the upper surface of the front roof arch 30 is further welded. The front roof arch 30 is connected to the roof side rail 12 by welding the other end of the roof arch fixing bracket 36 with one end welded W7 to the inner surface in the vehicle width direction of the roof side rail 12. Then, the outer member 37 whose upper end is welded W9 to the lower surface of the roof side rail 12 is overlapped on the lower joint flange 29f of the side outer panel 29 and the flange portion 35c of the inner member 35 and welded W10, thereby forming the door rim fixing flange 34. To do.

  As shown in FIGS. 1 and 5, the vehicle width direction end portion of the windshield 32 is supported by the A pillar upper rear portion 13 and the A pillar upper front portion 15. The inner member 35 welded to the rear portion 13 of the A-pillar upper 13 is provided with a windshield fixing flange 35d projecting inward in the vehicle width direction from the front end thereof. The windshield fixing flange 35d extends the upper end of the side outer panel 29 at the vehicle width. The windshield 32 is fixed to the front glass fixing flanges 35d and 29g, which are overlapped on the front glass fixing flange 29g bent inward in the direction, and welded W11.

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

  The upper frame 14 in which the roof side rail 12 and the A pillar upper rear portion 13 of the vehicle body side frame 11 are integrated is a three-dimensional bending process of a steel pipe having a circular cross section. Therefore, the cross sectional area of the steel pipe is reduced to reduce the weight. The required strength of the upper frame 14 can be ensured while being planned.

  The roof panel 31 joined to the roof side rail 12 of the upper frame 14 is bent at the outer end in the vehicle width direction and outward in the vehicle width to form a first step portion 31c composed of the vertical wall 31a and the horizontal wall 31b. Since the horizontal wall 31b of the first step portion 31c is brought into line contact with the upper surface of the roof side rail 12 and the contact portion is laser-welded W1, the position of the roof side rail 12 subjected to three-dimensional bending with relatively low processing accuracy is Even if they are displaced in the width direction (see the chain line in FIG. 2), a contact portion is provided for linearly contacting the lateral wall 31b of the first step portion 31c of the roof panel 31 to the upper surface of the roof side rail 12, and the contact portion is welded W1. The roof side rail 12 can be firmly joined without being affected by the accuracy. Moreover, since the roof panel 31 is directly welded W1 to the upper frame 14, not only the conventionally required joining bracket is unnecessary, but the cost can be reduced, and the connection between the upper frame 14 and the roof panel 31 can be reduced. Stiffness is improved.

  Further, the upper end of the side outer panel 29 is bent downward and inward in the vehicle width direction to form a second step portion 29e composed of the vertical wall 29c and the upper joint flange 29d, and the upper joint flange 29d of the second step portion 29e is the first step portion. Since it welded to the upper surface of the horizontal wall 31b of 31c (refer FIG. 2), welding work becomes easy and productivity improves.

  Further, below the roof side rail 12, a lower joint flange 29f is formed at the lower end of the side outer panel 29, the lower joint flange 29f and the roof side rail 12 are connected by a stay 33, and the lower joint flange 29f and the stay 33 are overlapped. Since the connecting portion is the door-drim fixing flange 34 (see FIG. 2), the door-drim fixing flange 34 is overlapped by two sheets of plate material, thereby increasing the strength.

  An inner member 35 having a windshield fixing flange 35d that supports the outer end of the windshield 32 in the vehicle width direction is fixed to the rear portion 13 of the A pillar upper (see FIG. 5), and the front roof arch is fixed to the upper part of the windshield fixing flange 35d. Since the part 35b is integrally formed (see FIG. 4), the support rigidity of the both side edges and the upper edge of the windshield 32 in the vehicle width direction is increased, and unpleasant vibration of the windshield 32 is suppressed.

  Further, a lower joint flange 29f is formed at the lower end of the side outer panel 29, an outer member 37 is welded W9 to the rear portion 13 of the A pillar upper, and a connection portion where the lower joint flange 29f, the outer member 37 and the inner member 35 are overlapped is fixed to a door rim. Since the flange 34 is used (see FIG. 4), the door rim fixing flange 34 is formed by stacking three plate materials to increase the strength.

  The front end of the upper frame 14 is fixed to the upper end of the A pillar lower 17 with a pair of gussets 21 from both sides in the vehicle width direction, and the rear end of the upper frame 14 is fixed to the upper end of the D pillar 20 'with the pair of gussets 27 in the vehicle width direction. Since it is fixed by being sandwiched from both sides (see FIG. 1), the upper frame 14, the A pillar lower 17 and the D pillar 20 ′ can be assembled easily and firmly.

Second and third embodiments

  Next, second and third embodiments of the present invention will be described with reference to FIG.

  In the second embodiment shown in FIG. 6A, the second step portion 29e is not provided at the upper end of the side outer panel 29, and an upper joint flange 29d is provided by bending the upper end of the side outer panel 29 downward. . The upper joint flange 29 d is bonded to the vertical wall 31 a of the first step portion 31 c of the roof panel 31 via an adhesive 40.

  As a result, there is no groove at the joint between the side outer panel 29 and the roof panel 31 and the rigidity is improved, and the molding 39 (see FIG. 2) for filling the groove becomes unnecessary, and the joint can be continuously bonded. Therefore, rigidity is improved.

  In the third embodiment shown in FIG. 6 (B), laser brazing welding W12 is used instead of the adhesion of the second embodiment, and the second embodiment is also implemented by this third embodiment. The effect similar to a form can be achieved.

Fourth embodiment

  Next, a fourth embodiment of the present invention will be described with reference to FIG.

  In the first embodiment, the upper frame 14 is made of a steel pipe having a circular cross section. In the fourth embodiment, the upper frame 14 is made of a steel pipe having a non-circular cross section having a flat surface 14a on the upper surface. . The horizontal wall 31b of the first step portion 31c of the roof panel 31 is in surface contact with the flat surface 14a of the upper frame 14 from above and is laser-welded W1. According to the fourth embodiment, the same function and effect as those of the first embodiment can be achieved.

  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, in the embodiment, the upper frame 14 is bent by three-dimensional bending, but it may be bent by three-dimensional hot bending or hydroforming.

  The lateral wall 31b of the first step portion 31c may be a plurality of step portions, and at least one of the step portions may be a contact portion that makes line contact or surface contact with the upper surface of the roof side rail 12.

  In addition to the laser welding W1, the joining of the contact portion includes a joining means capable of joining from one side such as adhesive joining.

  The means for joining the upper joint flange 29d of the second step portion 29e to the upper surface of the lateral wall 31b of the first step portion 31c may be welding such as spot welding W2 or adhesion.

  Although the vehicle body of the embodiment includes the D pillar 20 ', the C pillar 20 may be the last pillar without the D pillar 20'.

12 the roof side rail 14 upper frame 16 A Piraappa over 29 side outer panel 29d upper joint flange 29f lower joint flange 31 roof panel 31a the vertical wall 31b lateral wall 31c first step portion 32 front glass 34 Doadorimu fixing flange 35 the inner member 35b Front roof arch fixing portion 35d Windshield fixing flange 37 Outer member W1 Welding (joining )

Claims (2)

The steel pipe is integrally bent by three-dimensional bending to form an upper frame (14) in which the A pillar upper (16) and the roof side rail (12) are continuously integrated, and the roof panel (31) in the vehicle width direction A first step portion (31c) including a vertical wall (31a) and a horizontal wall (31b) is formed by bending the outer end portion downward and outward in the vehicle width direction, and the horizontal wall (31b) of the first step portion (31c) is formed. A contact portion that makes line contact or surface contact is formed on the upper surface of the roof side rail (12), the contact portion is joined (W1), and the upper joining flange (29d) formed at the upper end of the side outer panel (29) is the first stage portion is brought into contact with the upper surface of the lateral wall (31b) of (31c) joined, the inner member having a windshield fixed flange (35d) for supporting the vehicle width direction outer end of the windshield (32) 35) fixed to the A-pillar upper (16), a vehicle body structure for an automobile, characterized in that the front roof arch fixing portion (35b) formed integrally with an upper portion of the front glass fixing flange (35d). A lower joint flange (29f) is formed at the lower end of the side outer panel (29), an outer member (37) is fixed to the A pillar upper (16), the lower joint flange (29f), and the outer member (37) The vehicle body structure according to claim 1, wherein the connecting portion where the inner members (35) are overlapped with each other is a door rim fixing flange (34) .

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