JP2009067231A - Vehicle body rear part structure for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body rear part structure for a vehicle capable of enhancing operation stability by enhancing the rigidity of a rear fender, enhancing strength and rigidity of a bonding part of a rear pillar of a back door opening and a rear header and enhancing the rigidity of the back door opening part, i.e, twisting rigidity of a vehicle body. <P>SOLUTION: A tire house reinforcement member 13 is arranged so as to be extended along an outer surface of an inner member 8a of the rear fender 8 bonded to an inner member 20 of the rear pillar 3 in a vertical direction, and is bonded to an inner member 8a of the rear fender 8 and an outer member 55 of a rear tire house 5, and forms a closed cross section structure in cooperation with the inner member 8a of the rear fender 8. A pillar reinforcement 22 forms a closed cross section structure in cooperation with the inner member 8a of the rear fender above the tire house reinforcement member 13, and the tire house reinforcement member 13 and the rear header 4 are connected by the pillar reinforcement 22 through a series of closed cross section structure. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body rear structure of a vehicle, and more particularly to a structure in which strength and rigidity of a joint portion between a rear pillar and a rear header of a back door opening are increased together with a rear fender.

  Conventionally, in a one-box type vehicle such as a van or a wagon, a back door opening is generally formed at the rear of the vehicle body, and a pair of left and right side edges, an upper edge, and a lower edge of the back door opening. Are formed by a pair of left and right rear pillars, a rear header, and a rear end member. Both ends of the rear header in the vehicle width direction are coupled to the upper ends of the pair of rear pillars, and the rear end members of the pair of rear pillars are coupled to the lower ends. Both ends in the vehicle width direction are joined.

  In addition, a pair of left and right roof side rails, a rear fender, and a rear tire house are provided at the rear of the vehicle body. A rear suspension is connected to the rear suspension tower, and a load is input from the rear suspension. Is transmitted from the rear tire house to the rear fender, the back door opening and the like.

  By the way, in a vehicle having a back door opening, it is important to increase the rigidity of the back door opening in order to increase the torsional rigidity of the vehicle body and improve the handling stability. The pair of rear pillars, the rear header, and the rear end member are configured such that their closed cross-sectional structures are connected in series in a substantially annular shape, and many rear pillars or the like are provided with reinforcements.

  Here, as in Patent Document 1, the rear pillar is disposed in a rearwardly downwardly inclined manner between the rear side door opening and the rear window opening, and is directly connected to the rear tire house. The pillar reinforcement of the rear pillar is a rear pillar. And the inner member of the pillar reinforcement to form a closed cross-sectional structure, the upper end of the pillar reinforcement is connected to the roof panel, and the lower end of the pillar reinforcement is the outer tire housing. Structures coupled to members are known.

JP-A-9-71266

  In a vehicle having a back door opening, in order to increase the rigidity of the back door opening, the pair of rear pillars, the rear header, and the rear end member of the back door opening are connected in a series of substantially closed cross-sectional structures. Although some rear pillars have reinforcements, this alone can sufficiently increase the rigidity of the back door opening, that is, the torsional rigidity of the vehicle body, and sufficiently improve the steering stability. It can be difficult.

  In particular, stress concentration due to the load from the rear suspension input to the back door opening occurs at the joint between the rear pillar and the rear header, and thus it is necessary to reinforce firmly in order to solve the above problem.

  Also, in a vehicle having a back door opening, the lower end of the rear pillar is located behind the rear tire house and is not directly coupled to the rear tire house, but is connected to the rear tire house via a rear fender. In order to sufficiently improve the steering stability, it is also important to sufficiently increase the rigidity of the rear fender.

  In the structure of Patent Document 1, since the rear pillar is disposed in a downwardly inclined manner between the rear side door opening and the rear window opening and is directly connected to the rear tire house, a vehicle having a back door opening is provided. Unlike the rear vehicle body structure, the rear fender of a vehicle having a back door opening cannot be sufficiently enhanced in rigidity.

  The object of the present invention is to increase the rigidity of the rear door and to strengthen the joint between the rear pillar and the rear header of the back door opening, thereby increasing its strength and rigidity. The torsional rigidity of the vehicle can be improved, and the vehicle body rear structure can be improved.

  The rear body structure of the vehicle according to claim 1 is a rear pillar having a pair of closed cross-sectional structures forming left and right side edges of a back door opening of the vehicle, and both ends in the vehicle width direction are coupled to the upper end portions of the rear pillars. And a rear header having a closed cross-sectional structure that forms an upper edge of the back door opening, and a vertical direction along the outer surface of the inner member of the rear fender coupled to the inner member of the rear pillar. A tire house reinforcing member that is connected to an inner member of the rear fender and an outer member of the rear tire house to form a closed cross-sectional structure in cooperation with the inner member of the rear fender, Pillar reinforcement that forms a closed cross-section structure in cooperation with the inner member of the rear fender above the tire house reinforcing member A, characterized in that said tire house reinforcement member and the rear headers are connected through a series of closed cross the pillar reinforcement.

  In this vehicle body rear structure, the inner member of the rear fender is coupled to the inner member of the rear pillar, and the tire house reinforcing member is disposed so as to extend in the vertical direction along the outer surface of the inner member of the rear fender. The inner member and the outer member of the rear tire house are coupled to form a closed cross-sectional structure in cooperation with the inner member of the rear fender, and the pillar reinforcement of the rear pillar is disposed above the tire house reinforcing member. A closed cross-section structure is formed in cooperation with the member, and the tire house reinforcing member and the rear header are connected by a pillar reinforcement through a series of closed cross-section structures.

  The load from the rear suspension is input to the rear fender and the back door opening, and stress concentration due to the load from the rear suspension input to the back door opening occurs at the joint between the rear pillar and the rear header. The reinforcement member and the rear header are connected by a pillar reinforcement through a series of closed cross-sectional structures, so that the load from the rear suspension can be reliably received and effective at the joint between the rear pillar and the rear header. In addition to being transmitted, the rigidity of the rear fender is increased, the strength and rigidity of the joint portion between the rear pillar and the rear header is increased, and the rigidity of the back door opening is increased.

  The following configurations can be adopted as the dependent claims. The upper part of the pillar reinforcement forms a closed sectional structure in cooperation with the inner member of the rear fender, and the upper part of the pillar reinforcement is coupled to the rear header, the roof side rail, and the tire house reinforcing member ( Claim 2). The rear header includes an upper member and a lower member, and a hinge reinforcement to which a back door hinge is attached, and these members cooperate to form at least a part of a closed cross-sectional structure of the rear header (claim). 3). A rain bulge that bulges toward the upper member of the rear header is provided at an outer end portion of the hinge reinforcement in the vehicle width direction.

  According to the vehicle body rear structure of the vehicle according to claim 1, the rear fender inner member and the rear tire house are arranged so as to extend vertically along the outer surface of the inner member of the rear fender coupled to the inner member of the rear pillar. A tire house reinforcing member coupled to the outer member of the rear fender to form a closed cross-sectional structure in cooperation with the inner member of the rear fender, and the rear pillar cooperates with the inner member of the rear fender above the tire house reinforcing member. A pillar reinforcement that forms a closed cross-section structure is connected, and the tire house reinforcing member and the rear header are connected via a series of closed cross-section structures by the pillar reinforcement.

  In other words, the load from the rear suspension is input to the rear fender and the back door opening, and the stress concentration due to the load from the rear suspension input to the back door opening occurs at the joint between the rear pillar and the rear header. The tire house reinforcement member further utilizes a pillar reinforcement to connect the tire house reinforcement member and the rear header through a series of closed cross-sectional structures by the pillar reinforcement, thereby reducing the load from the rear suspension. It can be securely received and transmitted to the joint between the rear pillar and the rear header, and the rigidity of the rear fender is increased, and the strength and rigidity of the joint between the rear pillar and the rear header is increased, thereby improving the rigidity of the back door opening. In other words, it is possible to increase the torsional rigidity of the vehicle body and improve steering stability. That.

  According to the vehicle body rear part structure of the vehicle according to claim 2, since the upper part of the pillar reinforcement forms a closed cross-section structure in cooperation with the inner member of the rear fender, the upper part of the pillar reinforcement is used, An effect similar to that of the first aspect can be achieved.

  According to the vehicle body rear part structure of the vehicle according to claim 3, the rear header has an upper member and a lower member, and a hinge reinforcement to which the back door hinge is attached, and these members cooperate to close the rear header. Since at least a part of the cross-sectional structure is formed, a hinge reinforcement with high strength and rigidity is used, so this hinge reinforcement is used to reliably increase the rigidity of the rear header and the rear pillar. The strength and rigidity of the joint between the rear header and the rear header can be reliably increased.

  According to the vehicle body rear part structure of the vehicle according to the fourth aspect of the present invention, since the rain bulge portion is provided at the outer end portion of the hinge reinforcement in the vehicle width direction so as to approach the upper member of the rear header. The rigidity of the force can be reliably increased, and the rain ridge can be securely coupled to the upper member of the rear header, so that the strength and rigidity of the joint between the rear pillar and the rear header can be further increased.

  In the vehicle body rear structure of the present invention, the pair of left and right side edges and the upper edge of the back door opening are respectively a rear pillar having a pair of left and right closed cross sections and a rear header having a closed cross section. The upper end of the pair of rear pillars is joined to both ends of the rear header in the vehicle width direction, and the tire house reinforcing member is vertically moved along the outer surface of the inner member of the rear fender joined to the inner member of the rear pillar. The rear pillar is connected to the inner member of the rear fender and the outer member of the rear tire house to form a closed sectional structure in cooperation with the inner member of the rear fender. A pillar reinforcement that forms a closed cross-sectional structure in cooperation with an inner member of the rear fender, and a tire house reinforcing member, a rear header, It is connected through a series of closed cross the pillar reinforcement.

  The vehicle to which the present invention is applied is a so-called 5-door hatchback type automobile C having a front seat including a driver's seat, a rear seat located on the rear side, and a luggage compartment located on the rear side. In the following description, reinforcement is abbreviated as rain.

  As shown in FIGS. 1 to 3, the rear structure 1 of the automobile C includes a back door opening 2, a pair of left and right rear pillars 3, a rear header 4, a rear end member 5, a pair of left and right roof side rails 6, and a roof. A panel 7, a pair of left and right rear fenders 8, a pair of left and right rear tire houses 9, a rear floor panel 10, a rear end panel 11 and the like are provided.

  A pair of side edges, an upper edge, and a lower edge of the back door opening 2 have a pair of closed pillars, a rear pillar 3 having a closed section structure, a rear header 4 having a closed section structure, and a rear end member having a closed section structure. 5 is formed. The pair of rear pillars 3 are disposed in an inclined shape so as to move rearward as the lower part is disposed, and the rear header 4 and the rear end member 5 are disposed substantially horizontally in the vehicle width direction. Both end portions in the vehicle width direction of the rear header 4 are coupled to the upper end portions of the pair of rear pillars 3, and both end portions in the vehicle width direction of the rear end member 5 are coupled to the lower end portions of the pair of rear pillars 3.

  A back door (not shown) is connected to the rear header 4 via a pair of back door hinges (not shown) so as to be rotatable about an axis directed in the vehicle width direction. Ca) is opened and closed.

  A rear end portion of the pair of roof side rails 6 is coupled to a coupling portion 80 between the pair of rear pillars 3 and the rear header 4, and a rear end edge of the roof panel 7 is coupled to the rear header 4. Both edges in the width direction are coupled to a pair of roof side rails 6. The upper rear end edges of the pair of rear fenders 8 are coupled to the pair of rear pillars 3, and the upper ends of the pair of rear fenders 8 are coupled to the pair of roof side rails 6. Coupled to the pair of rear fenders 8. A rear end edge of the rear floor panel 10 is coupled to the rear end panel 11, both end edges in the vehicle width direction of the rear floor panel 10 are coupled to the pair of rear fenders 8 and the rear tire house 9, and the rear end panel 11 is coupled to the rear end member 5. Yes.

The vehicle body rear structure 1 will be described in detail with reference to FIGS.
The rear pillar 3 includes an inner member 20, an outer member 21, and a pillar rain 22, and these 20 to 22 are coupled to each other to form a closed cross-sectional structure. The rear header 4 includes an inner member 30 (a lower member 31 and a pair of hinge rains 32), an outer member 33, and an upper member 34 (header rain 34), which are coupled to each other to form a closed cross-sectional structure. Forming. The rear end member 5 has an inner member 40 and an outer member 41, and these 40 and 41 are connected to each other to form a closed cross-sectional structure.

  In the back door opening 2, the inner members 20, 30, 40 of the rear pillar 3, the rear header 4, and the rear end member 5 are basically coupled to each other, and the rear pillar 3, the rear header 4, and the outer member of the rear end member 5 are joined together. 21, 33, 41 are coupled to each other so that the closed cross-sectional structure of the pair of rear pillars 3, the closed cross-sectional structure of the rear header 4, and the closed cross-sectional structure of the rear end member 5 are connected in series in a substantially annular shape. .

  The inner member 20 of the rear pillar 3 includes an inner upper end portion 20a, an inner middle upper portion 20b, and an inner lower portion 20c, which are sequentially arranged from top to bottom. The inner member 20 is coupled to the inner member 8 of the rear fender 8, and It is integrally formed with the inner member 8a of the rear fender 8.

  The outer member 21 of the rear pillar 3 includes an outer upper portion 21a, an outer middle lower portion 21b, and an outer lower end portion 21c which are sequentially arranged from top to bottom. The outer middle lower portion 21b is a back lamp to which a back lamp (not shown) is attached. The back lamp attachment member 25 is integrally formed with the attachment member 25, and the outer lower end portion 21 c is integrally formed with the outer member 41 (rear end panel 11) of the rear end member 5.

  The pillar rain 22 of the rear pillar 3 is composed of a pillar rain upper 22a and a pillar rain lower 22b that are vertically connected to each other. The upper part of the pillar rain upper 22a is connected to the rear header 4 and the roof side rail 6, and the pillar rain lower 22b. Is connected to the rear end member 5.

  In the rear header 4, the inner member 30 includes a lower member 31 and a pair of left and right hinge rains 32 coupled to both ends of the lower member 31 in the vehicle width direction, and the upper member 34 includes a pair of hinges with the lower member 31. It is coupled to both rain 32. That is, the rear header 4 has a pair of hinge rains 32 at both ends in the vehicle width direction, and a pair of back door hinges are attached to the hinge rains 32.

  The outer member 33 of the rear header 4 is formed integrally with the roof panel 7, and the outer member 41 of the rear end member 5 is formed integrally with the rear end panel 11. Further, the rear part of the roof side rail 6 and the inner members 6a and 8a of the rear fender 8 are integrally formed, and the outer members 6b and 8b of the roof side rail 6 and the rear fender 8 are integrally formed.

  The rear tire house 9 includes an inner member 50 and an outer member 55, and the inner peripheral portion of the inner member 50 and the outer member 55 is coupled to each other and is coupled to the inner member 8 a of the rear fender 8. In the rear tire house 9, the inner member 50 protrudes inward in the vehicle width direction with respect to the inner member 8 a of the rear fender 8, and a rear suspension tower 51 is provided on the inner member 50, and a rear suspension (not shown) is provided on the rear suspension tower 51. Further, the outer member 55 projects outward in the vehicle width direction with respect to the inner member 8a of the rear fender 8, and is coupled to the outer member 8b of the rear fender 8.

  A connecting portion 60 between the rear pillar 3 and the rear end member 5 will be described with reference to FIGS. In the coupling portion 60, the inner member 20 of the rear pillar 3 is coupled so that the inner lower portion 20c is coupled to the inner member 40 of the rear end member 5 from the vehicle width direction, and the outer member 21 of the rear pillar 3 is coupled to the outer lower end thereof. The portion 21c is integrally formed with the outer member 41 of the rear end member 4 to be in a coupled state, and the pillar rain 22 has a lower end portion of the pillar rain lower 22b positioned at the coupling portion 60.

  Node portions 62 and 63 are provided on both the pillar rain 22 (pillar rain lower 22b) of the rear pillar 3 and the inner member 40 of the rear end member 5 so as to divide the closed cross-sectional space 61 of the joint portion 60 in a double manner. The joint 62 is formed using the lower end of the pillar rain 22, and the joint 63 is formed using the outer end of the inner member 40 of the rear end member 5 in the vehicle width direction.

  The inner member 20 of the rear pillar 3 and the outer member 41 of the rear end member 5 in the coupling portion 60 wrap in the vehicle width direction, and the nodes 62 and 63 are positioned in the closed cross-sectional space 61 including the wrap portion. The node portions 62 and 63 are formed in an inclined shape that moves rearward in the vehicle width direction outward.

  In the coupling portion 60, the pillar rain 22 is located between the inner member 20 of the rear pillar 3 and the outer member 41 of the rear end member 5, and the inner end portion of the pillar rain 22 in the vehicle width direction is connected to the inner member 20 of the rear pillar 3. It is clamped by the inner member 40 of the rear end member 5 and joined in a three-ply manner, the middle part in the vehicle width direction of the pillar rain 22 is joined to the outer member 41 of the rear end member 5, and the outer end part in the vehicle width direction of the pillar rain 22 is joined. A part between the inner member 40 and the outer member 41 of the rear end member 5 of the pillar rain 22 is coupled to the inner member 20 of the rear pillar 3 to form a node 62.

  In the coupling portion 60, the inner member 40 of the rear end member 5 extends from the coupling portion with the inner member 20 of the rear pillar 3 in an inclined manner outward in the vehicle width direction and to the rear side. The end portion is sandwiched between the pillar rain 22 and the outer member 41 of the rear end member 5 and joined in a three-layered manner. Of the inner members 40 of the rear end member 5, the inner member 20 of the rear pillar 3 and the outer member 41 of the rear end member 5 A portion between the two coupling portions forms a node portion 63, and the node portion 63 is disposed along the node portion 62 of the pillar rain 22 with a slight gap.

  In the coupling portion 60, the outer member 41 of the rear end member 5 and the inner member 20 of the rear pillar 3 on the outer side in the vehicle width direction and the portion between the coupling portions of the pillar rain 22 also have a node portion 64 that partitions the closed cross-section space 61. Forming.

  Here, as shown in FIGS. 1, 3, 6 to 10, and 20, the vehicle body rear structure 1 includes a pair of left and right suspension tower reinforcing members 12, and the suspension tower reinforcing members 12 make a pair of rear pillars 3. The inner member 20 (the inner middle upper portion 20b) and the pair of rear suspension towers 51 are connected to each other on the passenger compartment side. The rear suspension tower 51 is reinforced by a suspension tower reinforcement bracket 52 coupled to the inner member 50 of the rear tire house 9, and is connected to the suspension tower reinforcement member 12 via the suspension tower reinforcement bracket 52.

  The suspension tower reinforcement member 12 has substantially the same width in the vehicle width direction as the inner member 50 of the rear tire house 9 and is disposed in an inclined posture that moves upward toward the rear, and its front lower end is coupled to the suspension tower reinforcement bracket 52. Thereafter, the upper end portion is coupled to the inner member 20 of the rear pillar 3, and the outer end edge in the vehicle width direction is coupled to the inner member 8 a of the rear fender 8. The suspension tower reinforcing member 12 allows the load from the rear suspension to be applied to the rear suspension tower. 51 is effectively transmitted to the rear fender 8 and the rear pillar 3.

  The joint portion 70 of the rear pillar 3 and the suspension tower reinforcing member 12 will be described with reference to FIGS. 3, 7 to 10, and 20. A node 72 is provided in the pillar rain 22 forming a part of the closed section structure of the rear pillar 3 so as to partition the closed section space 71 in the vicinity of the coupling portion 70, and the node 72 is a lower end of the pillar rain upper 22a. The pillar rain 22 (pillar rain upper 22a) extends upward from the vicinity of the coupling portion 70, and the upper portion of the pillar rain 22 is coupled to the rear header 4 (hinge rain 32) and the roof side rail 6. ing.

  In the vicinity of the coupling portion 70, the upper end portion of the pillar rain lower 22b is coupled to the upper end portion of the node portion 72 of the pillar rain upper 22a from the outer member 21 side, and the node portion 72 of the pillar rain upper 22a is connected to the pillar rain lower 22b. The lower end portion of the inner member 20 is bent to the inner member 20 (the inner upper portion 20b), and the suspension tower reinforcing member 12 is connected to the connecting portion of the inner member 20 to the node portion 72. A node 72 is provided so as to partition the closed cross-sectional space 71 formed by the inner member 20 and the pillar rain 22.

  The joint 80 and the like between the rear pillar 3 and the rear header 4 will be described with reference to FIGS. 1 to 7, FIGS. 11 to 18, and FIGS. In this connecting portion 80, the upper portion (inner upper end portion 20a) of the inner member 20 of the rear pillar 3 is connected to the hinge rain 32 of the rear header 4, and is also connected to the roof side rail 6, and the upper portion of the pillar rain 22 is the rear portion. The header 4 is coupled to the hinge rain 32 of the header 4 and the outer end of the upper member 34 in the vehicle width direction, and is also coupled to the roof side rail 6.

  In this connecting portion 80, an inner raised portion 81 having a hat-shaped cross section is provided at the inner end portion in the vehicle width direction of the upper end portion of the inner member 20 of the rear pillar 3, and the hinge rain 32 is joined to the inner raised portion 81 from above. Yes.

  In this coupling portion 80, the pillar rain 22 is positioned outside the inner member 20 of the rear pillar 3, and the raised portions 82 and 83 having a hat-shaped cross section formed in the pillar rain 22 and the hinge rain 32, respectively. The inner raised portion 81 is overlapped and joined to the raised portion 83 of the hinge rain 32 extending inward in the vehicle width direction from the joined portion. .

  In this coupling portion 80, a rain ridge portion 84 is provided on the hinge rain 32 so as to be positioned in front of the inner ridge portion 81 so as to approach the upper member 34 of the rear header 4. The upper member 34 is coupled to the upper portion 84 from the upper side, and the inner node portion 81a formed by the inner raised portion 81 and the rain node portion 84a formed by the rain raised portion 84 are configured to be positioned substantially front and rear. .

  Here, the vehicle body rear structure 1 includes a pair of left and right tire house reinforcing members 13. The tire house reinforcing member 13 is disposed so as to extend in the vertical direction along the outer surface of the inner member 8a of the rear fender 8 coupled to the inner member 20 of the rear pillar 3, and the inner member 8a of the rear fender 8 and the rear tire house. The outer member 55 is connected to the inner member 8a of the rear fender 8 to form a closed cross-sectional structure.

  The tire house reinforcing member 13 is formed in a U-shaped cross section, the flange 13a at the inner end in the vehicle width direction is coupled to the outer surface of the inner member 8a of the rear fender 8, and the flange 13b at the lower end is the outer member of the rear tire house 9. The top surface of 55 is coupled to the top surface.

  The rear pillar 3 has a pillar rain 22 that forms a closed cross-sectional structure in cooperation with the inner member 8a of the rear fender 8 above the tire house reinforcing member 13, and the tire house reinforcing member 13 and the rear header 4 are connected to the pillar rain. 22 are connected via a series of closed cross-sectional structures. The upper part of the pillar rain 22 forms a closed cross-sectional structure in cooperation with the inner member 8a of the rear fender 8, and is coupled to the rear header 4, the roof side rail 6, and the tire house reinforcing member 13.

  The rear header 4 includes an upper member 34 and a lower member 31 and a hinge rain 32 to which a back door hinge is attached. These members 31, 32, and 34 cooperate to form at least one of the closed sectional structure of the rear header 4. A rain raised portion 84 is formed at the outer end portion of the hinge rain 32 in the vehicle width direction so as to rise so as to approach the upper member 34 of the rear header 4. Here, the hinge rain 32 at the outer end portion of the rear header 4 in the vehicle width direction and the front portion and the rear portion of the upper portion of the pillar rain 22 cooperate to form two closed cross-sectional structures.

  The effect of the vehicle body rear portion structure 1 described above will be described.

  In the joint portion 60 between the rear pillar 3 and the rear end member 5, stress concentration occurs due to the load from the rear suspension input to the back door opening 2, but the closed cross-sectional space 61 of the joint portion 60 is doubled. In addition, since the joint portions 60 and 63 are provided in both the pillar rain 22 and the inner member 40 of the rear end member 5 in the joint portion 60, the joint portion 60 is very strongly reinforced to increase its strength and rigidity. The joints 62 and 63 can be formed using the lower end of the pillar rain 22 and the outer end of the inner member 40 of the rear end member 5 in the vehicle width direction. An increase in vehicle weight can be suppressed. Further, by providing the joint portions 62 and 63 on both of the inner members of the rear end member 5 of the pillar rain 22, the pillar rain 22 and the inner member 40 of the rear end member 5 can be smoothly connected.

  The inner member 20 of the rear pillar 3 and the outer member 41 of the rear end member 5 at the coupling portion 60 wrap in the vehicle width direction, and the nodes 62 and 63 are positioned in the closed cross-sectional space 61 including the wrap portion. Therefore, in this connecting portion 60, the connection between the inner members 20 and 40 of the rear pillar 3 and the rear end member 5 and the connection between the pillar rain 22 and the outer member 41 of the rear end member 5 are smoothly performed. The inner member 20 and the outer member 41 of the rear end member 5 can reliably form a closed section space 61, and the nodes 62 and 63 can be arranged so as to reliably partition the closed section space 61.

  Since the node portions 62 and 63 are formed in an inclined shape that moves rearward in the vehicle width direction outward direction, the positions of the inner side end portion and the outer side end portion of the node portions 62 and 63 in the vehicle width direction in the coupling portion 60 are set. By shifting, it is possible to avoid concentration of weak parts in strength, and the strength and rigidity of the joint 60 between the rear pillar 3 and the rear end member 5 can be reliably increased.

  As a modification, the node 62 or 63 is provided only on one of the pillar rain 22 and the inner member 40 of the rear end member 5, and the other node 63 or 62 of the pillar rain 22 and the inner member 40 of the rear end member 5 is omitted. May be. When the node portion 62 is provided only in the pillar rain 22, the node portion 62 may be formed in an inclined shape that moves forward in the vehicle width direction outward.

  Next, the load from the rear suspension is intensively input from the suspension tower reinforcing member 12 to the joint portion 70 of the rear pillar 3 with the suspension tower reinforcement member 12, but the closed cross-section space 71 in the vicinity of the joint portion 70 is partitioned. As described above, since the node portion 72 is provided in the pillar rain 22 which forms a part of the closed cross-sectional structure of the rear pillar 3, the vicinity of the coupling portion 70 is strongly reinforced to increase its strength and rigidity. The rear pillar 3 that is provided can reliably receive an input load from the suspension tower reinforcing member 12 and can be reliably transmitted to other members such as the rear header 4. Further, the joint 72 is formed using the pillar rain 22. Therefore, increase in the number of parts and vehicle weight can be suppressed.

  The pillar rain 22 is composed of a pillar rain upper 22a and a pillar rain lower 22b that are arranged and coupled vertically, and the node 72 is formed at the lower end of the pillar rain upper 22a. Therefore, the lower end of the pillar rain upper 22a is utilized. The joint 72 can be easily formed. The joint 72 is easily provided in the middle of the pillar rain 22 in the longitudinal direction, and the closed section space 71 in the vicinity of the joint 70 with the suspension tower reinforcing member 12 of the rear pillar 3 is provided. The rear pillar 3 can effectively transmit a particularly upward input load from the suspension tower reinforcing member 12 to the rear header 4.

  Since the upper part of the pillar rain 22 is coupled to the rear header 4 and the roof side rail 6, the input load from the suspension tower reinforcing member 12 is coupled to the rear pillar 3 to the rear header 4 and the roof side rail 6 with high strength and rigidity. Can be transmitted reliably.

  In this case, a hinge rain 32 to which a back door hinge is attached is formed by forming a part of the closed sectional structure of the rear header 4, and the upper portion of the pillar rain 22 is coupled to the hinge rain 32, so that the hinge rain having high strength and rigidity is high. 32, the coupling strength of the pillar rain 22 to the hinge rain 32 can be increased, and the input load from the suspension tower reinforcing member 12 can be effectively transmitted to the rear header 4 and reliably received.

  As a modification, instead of forming the node 72 at the lower end of the pillar rain upper 22a, a node may be formed at the upper end of the pillar rain lower 22b. The joint 72 may be coupled to the outer member 21 of the rear pillar 3. A node member may be formed by separately fixing a node member in the middle of the pillar rain upper 22a or the pillar rain lower 22b in the length direction. In this case, the pillar rain 22 may be formed by integrally forming the pillar rain upper 22a and the pillar rain lower 22b.

  Next, stress concentration due to the load from the rear suspension input to the back door opening 2 occurs at the joint 80 between the rear pillar 3 and the rear header 4, but the rear header 4 is at both ends in the vehicle width direction. The hinge rain 32 has a pair of hinge rains 32 to which the back door hinges are respectively attached. Since the upper end portion of the inner member 30 of the rear pillar 3 joined to the roof side rail 6 is joined to the hinge rain 32, the hinge rain 32 has a strength. Since a material having high rigidity is applied, the strength and rigidity of the coupling portion 80 can be increased, and the support rigidity of the hinge rain 32 (back door) can be increased to reliably reduce vibration noise.

  An inner raised portion 81 having a hat-shaped cross section is provided at the inner end portion in the vehicle width direction of the upper end portion of the inner member 20 of the rear pillar 3, and the hinge rain 32 is coupled to the inner raised portion 81, so that the upper end of the inner member 20 of the rear pillar 3 is In addition to increasing the rigidity of the portion, the inner member 20 of the rear pillar 3 and the hinge rain 32 can be securely connected to each other, and the inner node 81a can be formed by the inner raised portion 81. Therefore, the strength and rigidity of the connecting portion 80 are increased. be able to.

  Since the raised portions 82 and 83 having a hat-like cross section formed on the pillar rain 22 and the hinge rain 32 respectively positioned outside the inner member 20 of the rear pillar 3 are overlapped and continuously coupled, the pillar rain 22 and the hinge rain are combined. 32, the rigidity of the coupling part 80 between the rear pillar 3 and the rear header 4 is more reliably increased, and the support rigidity of the hinge rain 32 is reliably increased. Further, since the inner ridge 81 is overlapped and coupled to the ridge 82 of the hinge rain 32 extending inward in the vehicle width direction from the coupling portion of both the ridges 82 and 83, the ridge of the hinge rain 32 is coupled. Using the portion 82, the upper end portion of the inner member 20 of the rear pillar 3 can be reliably coupled to the hinge rain 32.

  Since the rain rain portion 84 is provided in the hinge rain 32 so as to be positioned in front of the inner bump portion 81 and so as to approach the upper member 34 of the rear header 4, the rigidity of the hinge rain 32 is further enhanced. The rain raised portion 84 can be coupled to the upper member 34 of the rear header 4, and the strength and rigidity of the coupling portion 80 between the rear pillar 3 and the rear header 4 can be further increased.

  Since the inner node portion 81a formed by the inner raised portion 81 and the rain node portion 84a formed by the rain raised portion 84 are configured to be positioned substantially front and rear, the inner raised portion 81 and the rain raised portion 84 are formed. The joints 80 of the rear pillar 3 and the rear header 4 can be reliably increased by the joint portions 81a and 84a.

  Next, the inner member 8a of the rear fender 8 coupled to the inner member 20 of the rear pillar 3 is disposed so as to extend vertically along the outer surface of the inner member 8a of the rear fender 8, and the inner member 8a of the rear fender 8 and the outer member of the rear tire house 9 are disposed. 55, a tire house reinforcing member 13 that forms a closed cross-section structure in cooperation with the inner member 8a of the rear fender 8 is provided. The rear pillar 3 has an inner member of the rear fender 8 above the tire house reinforcing member 13. A pillar rain 22 that forms a closed cross-sectional structure in cooperation with 8a is provided, and the tire house reinforcing member 13 and the rear header 4 are connected by the pillar rain 22 through a series of closed cross-sectional structures.

  That is, the load from the rear suspension is input to the rear fender 8 and the back door opening 2, and the joint 80 between the rear pillar 3 and the rear header 4 is caused by the load from the rear suspension input to the back door opening 2. Although stress concentration occurs, the tire house reinforcing member 13 and the pillar rain 22 are used to connect the tire house reinforcing member 13 and the rear header 4 via the pillar rain 22 through a series of closed cross-sectional structures. The load from the rear suspension can be reliably received and effectively transmitted to the joint 80 between the rear pillar 3 and the rear header 4, and the rigidity of the rear fender 8 can be increased, and the joint 80 between the rear pillar 3 and the rear header 4. Strength and rigidity can be increased.

  Since the upper front portion of the pillar rain 22 forms a closed cross-sectional structure in cooperation with the inner member 8a of the rear fender 8, the above effect can be achieved by using the pillar rain 22.

  The rear header 4 includes an upper member 34 and a lower member 31 and a hinge rain 32 to which a back door hinge is attached. These members 31, 32, and 34 cooperate to form at least one of the closed sectional structure of the rear header 4. Because the hinge rain 32 is made of a material having high strength and rigidity, the hinge rain 32 is used to reliably increase the rigidity of the rear header 4, and the rear pillar 3 and the rear header 4 The strength and rigidity of the joint 80 can be reliably increased.

  In addition, since the rain ridge 81 that protrudes toward the upper member 34 of the rear header 4 is provided at the outer end portion of the hinge rain 32 in the vehicle width direction, the strength and rigidity of the hinge rain 32 are reliably increased. Thus, the rain protruding portion 81 can be securely coupled to the upper member 34 of the rear header 4, and the rigidity of the rear fender 8 is further increased, and the strength and rigidity of the coupling portion 80 between the rear pillar 3 and the rear header 4 is further increased. Can do.

  Here, the load from the rear suspension is applied to the first path including the front portion of the upper portion of the tire house reinforcing member 13 and the pillar rain 22 and the portion other than the front portion of the upper portion of the suspension tower reinforcing member 12 and the pillar rain 22. Since it can be dispersed and effectively transmitted to the joint 80 between the rear pillar 3 and the rear header 4 by the second path including, the increase of the plate thickness of each member (sustower reinforcing member 12, tire house reinforcing member 13, etc.) is increased. Thus, the rigidity of the rear fender 8 can be increased, and further, the strength and rigidity of the joint 80 between the rear pillar 3 and the rear header 4 can be increased.

  As a modification, the front portion of the upper portion of the pillar rain 22 may be omitted, and a portion corresponding to the upper portion of the pillar rain 22 may be formed by extending the tire house reinforcing member 13 upward.

  Thus, according to the vehicle body rear structure 1 of the present invention, the rigidity of the back door opening 2 (rear pillar 3, rear header 4, rear end member 5) and the rigidity of the rear fender 8 are greatly increased, and the torsional rigidity of the vehicle body is increased. Can be sufficiently increased, and the steering stability can be sufficiently improved.

  In addition, various modifications other than those disclosed above can be added without departing from the spirit of the present invention, and the present invention can be applied to a vehicle body such as various automobiles having a back door opening. Applicable to rear structure.

It is a perspective view from the rear upper direction of a vehicle body rear part structure. It is a perspective view from the back of a vehicle body rear part structure. It is a side view from the compartment side of a vehicle body rear part structure. It is the perspective view from the back which omitted the rear end panel of the principal part of the body rear part structure. FIG. 5 is a view in which an outer upper portion of a rear pillar, a roof side rail, and an outer member of a rear fender in FIG. 4 are omitted. FIG. 6 is a diagram in which an outer middle lower portion and a back lamp mounting member of the rear pillar in FIG. 5 are omitted. FIG. 7 is a view in which a rear end panel is added by omitting the rear portion of the pillar rain lower and the inner member of the roof side rail and the rear fender of FIG. 6. It is a perspective view from the vehicle compartment side front of the principal part of a vehicle body rear part structure. FIG. 9 is a diagram in which a lower inner portion of the rear pillar in FIG. 8 is omitted. It is a side view from the compartment side of the principal part of a vehicle body rear part structure. FIG. 5 is a perspective view from above after omitting a roof panel, a rear header, a roof side rail, and an outer member of a rear fender of a vehicle body rear structure. FIG. 12 is a diagram in which an outer upper portion of the rear pillar in FIG. 11 is omitted. It is the figure which abbreviate | omitted the upper member of the rear header of FIG. It is the figure which abbreviate | omitted the hinge rain of the rear header of FIG. It is the figure which abbreviate | omitted the pillar rain upper of FIG. It is a perspective view from the vehicle compartment side lower part of the principal part of a vehicle body rear part structure. It is the figure which abbreviate | omitted the lower member of the rear header of FIG. It is the figure which abbreviate | omitted the inner upper end part of the rear pillar of FIG. It is the XIX-XIX sectional view taken on the line of FIG. It is the XX-XX sectional view taken on the line of FIG. It is the XXI-XXI sectional view taken on the line of FIG. It is the XXII-XXII sectional view taken on the line of FIG. It is the XXIII-XXIII sectional view taken on the line of FIG. It is the XXIV-XXIV sectional view taken on the line of FIG. It is the XXV-XXV sectional view taken on the line of FIG. It is the XXVI-XXVI sectional view taken on the line of FIG.

Explanation of symbols

C Car 1 Car body rear structure 2 Back door opening 3 Rear pillar 4 Rear header 5 Rear end member 6 Roof side rail 7 Roof panel 8 Rear fender 9 Rear tire house 10 Rear floor panel 11 Rear end panel 12 Suspension tower reinforcement member 13 Tire house reinforcement member 22 Pillar rain 22a Pillar rain upper 22b Pillar rain lower 32 Hinge rain 51 Rear suspension towers 60, 70, 80 Coupling portions 61, 71 Closed cross-section spaces 62, 63, 72 Node portion 81 Inner raised portion 81a Node portions 82, 83 Raised portion 84 Rain raised portion 84a node

Claims (4)

A rear pillar having a pair of closed cross-sectional structures forming left and right side edges of the back door opening of the vehicle, and both ends in the vehicle width direction are coupled to the upper ends of these rear pillars so that the upper edge of the back door opening is In the rear structure of the vehicle body with a rear header having a closed cross-sectional structure to be formed,
The rear fender is connected to the inner member of the rear fender so as to extend vertically along the outer surface of the inner member of the rear fender. The inner member of the rear fender is connected to the inner member of the rear fender and the outer member of the rear tire house. A tire house reinforcing member that forms a closed cross-sectional structure in cooperation with the member,
The rear pillar has a pillar reinforcement that forms a closed cross-sectional structure in cooperation with the inner member of the rear fender above the tire house reinforcing member,
A vehicle body rear structure, wherein the tire house reinforcing member and the rear header are connected by a pillar reinforcement via a series of closed cross-sectional structures.   The upper part of the pillar reinforcement forms a closed cross-sectional structure in cooperation with an inner member of a rear fender, and is coupled to a rear header, a roof side rail, and a tire house reinforcing member. The vehicle body rear structure described in 1.   The rear header has an upper member and a lower member, and a hinge reinforcement to which a back door hinge is attached, and these members cooperate to form at least a part of the closed sectional structure of the rear header. The vehicle body rear part structure according to claim 1, wherein the vehicle body rear part structure is a vehicle body rear structure.   The vehicle body rear portion according to claim 3, wherein a rain bulge portion is provided at an outer end portion of the hinge reinforcement in a vehicle width direction so as to bulge so as to approach the upper member of the rear header. Construction.