JP6147789B2 - Rear structure of the car body - Google Patents

Description

  The present invention relates to a rear structure of a vehicle body in which at least one of a jack-up portion and a tie-down hook attachment portion is formed.

  For vehicle bodies such as automobiles, the jack is fixed to the loading platform when the vehicle is transported by a jack-up portion (jack-up point) to which the jack should be engaged when lifting the vehicle using a jack or a trailer. A tie-down hook attaching portion (hook engaging hole or the like) for hooking a hook of the tie-down rope is provided.

  As a vehicle body structure with a jack-up part and a tie-down hook attachment part, a cup-like attachment bracket is welded to the lower surface of a dash lower cross member which is one of strength members provided near the front wheel. In addition to opening a long hole to engage the tie-down hook, the opening edge of the long hole is folded inward at right angles to increase the rigidity of the opening edge and use the mounting bracket as a jack-up point The structure which enabled is well-known (patent document 1).

JP 58-76340 A

  However, at the rear part of the vehicle body, there is no vehicle body frame with high rigidity such as a dash cross member at a low position where the tie-down hook mounting portion and the jack-up portion are to be provided. For this reason, the tie-down hook mounting portion and the jack-up portion cannot be provided at the rear portion of the vehicle body.

  In view of such a background, the present invention can arrange a tie-down hook mounting portion and a jack-up portion at a low position on the rear portion of the vehicle body, and can generate an upward compressive load due to jack-up and a downward tensile load due to a tie-down hook. It is an object to provide a rear structure of a vehicle body that can be supported.

  In order to solve such a problem, the present invention provides a rear outer panel (30) that is provided so as to extend in the vehicle width direction along the rear end of the rear floor panel (10) and is joined to each other to form a closed cross section. ) And a rear inner panel (32), and a box structure (43) formed below the rear panel frame and having a box shape in cooperation with the rear panel frame. At least one of the jack-up part (44) and the tie-down hook attaching part (46, 48) is formed on the bottom part of the structure part.

  According to this configuration, it is possible to arrange the tie-down hook mounting portion and the jack-up portion at a lower position below the rear panel skeleton. In addition, an upward compressive load due to jack-up and a downward tensile load due to tie-down can be supported by a highly rigid rear panel skeleton.

  In the above invention, the length of the box structure portion (43) in the longitudinal direction of the vehicle body is the same as that of the lower portion of the rear panel skeleton (28) in the upper portion, and gradually decreases downward. The jack-up part (44) and the tie-down hook attaching part (46, 48) may be formed on the bottom of the part (43).

  According to this configuration, an upward compressive load due to jack-up and a downward tensile load due to tie-down are concentrated on the bottom portion having a short length in the front-rear direction of the vehicle body and dispersed throughout the front-rear direction of the rear panel skeleton. It can be transmitted to the vertical wall of the rear panel skeleton directly. Thereby, stress concentration in the rear panel skeleton can be prevented.

  In the above invention, the rear panel skeleton (28) forms a lower skeleton of the tailgate opening, and is provided inside the rear panel skeleton so as to be orthogonal to the vehicle width direction, and reinforces the rear panel skeleton. The head (50A) and a striker fixing part (50B) which is formed integrally with the bulk head and forms a fixing part of the tail gate locking striker may be further provided.

  According to this configuration, it is possible to increase the rigidity of the rear panel skeleton to increase the support rigidity of the rear panel skeleton against a compressive force or a tensile force. In addition, the support strength of the striker for locking the tailgate is increased.

  In the above invention, the pair of bulkheads (50A) that are provided inside the rear panel frame (28) so as to be orthogonal to the vehicle width direction and reinforce the rear panel frame, and the upper portions of the pair of bulkheads And a front wall (50C) connecting the front part of the pair of bulkheads and the front part of the upper wall are integrally formed and cooperates with the rear outer panel (30). It is preferable to further include a reinforcing member (50) that works to form a box structure, and that the reinforcing member and the box structure portion overlap each other in the vehicle width direction and the front-rear direction.

  According to this configuration, the reinforcing member forms a box structure continuous with the box structure portion above the box structure portion, and the load from the lower box structure portion is reliably supported by the portion forming the box structure of the rear panel skeleton. . That is, it is possible to increase the rigidity of the rear panel skeleton to increase the support rigidity of the rear panel skeleton with respect to compressive force and tensile force. In addition, since the reinforcing member forms a box structure, it is easy to place the reinforcing member on the rear outer panel or to perform a joining operation by welding or the like.

  Further, in the above invention, a vertical member (52) extending in the front-rear direction along the lower surface of the rear floor panel (10) is further provided, and the vertical member is joined to a lower portion of the box structure portion (43). It is good to have a configuration.

  According to this configuration, it is possible to increase the support rigidity of the box structure portion against the tensile force from obliquely below and rearward due to the tie-down.

  In the above invention, the box structure (43) includes a front L-shaped member (42) having a front wall (42A) and a bottom wall (42B), a rear wall (40A), a bottom wall (40B), and A rear L-shaped member (40) having left and right side walls (40C) is formed by joining the bottom walls (42B, 40B) to each other and joining to the rear outer panel (30). It is good to have a configuration.

  According to this configuration, by forming the bottom wall of the front L-shaped member and the bottom wall of the rear L-shaped member together, it is possible to increase the rigidity of the bottom portion of the box structure portion that forms the load support portion. it can. Moreover, since the structure of the front L-shaped member and the rear L-shaped member is simple, the joining operation | work of both members is easy.

  As described above, according to the present invention, the tie-down hook mounting portion and the jack-up portion can be disposed at a low position on the rear part of the body, and the upward compression load due to the jack-up and the downward tensile load due to the tie-down hook can be supported. A rear structure of the vehicle body can be provided.

Bottom view of the rear structure of the vehicle body related to the embodiment The perspective view which looked at the rear part structure of the vehicle body which concerns on embodiment from diagonally lower back The perspective view which looked at the rear part structure of the vehicle body which concerns on embodiment from diagonally upward front FIG. 3 is a perspective view corresponding to FIG. 3 with the rear inner panel removed. VV sectional view in FIG. A perspective view of the box structure viewed obliquely from the lower rear through the rear outer panel Perspective view of box structure viewed from diagonally forward

  Hereinafter, embodiments of a rear structure of a vehicle body according to the present invention will be described in detail with reference to the drawings. In the following description, “joining” is joining by welding such as spot welding unless otherwise specified. Each member may be made of a general steel plate, and some members may be made of a high-tensile steel plate as necessary. The “hat-shaped cross-sectional shape” is a cross-sectional shape including a groove-shaped cross-sectional shape portion and having flanges (welding allowance) extending outward on both sides of the groove-shaped cross-sectional shape portion.

  FIG. 1 is a bottom view of the rear structure of the vehicle body as viewed from below, and FIG. 2 is a diagonal view of the rear structure of the vehicle body seen through a left garter outer panel 34 and a rear inner panel 32 to be described later. It is a perspective view. As shown in FIGS. 1 and 2, the rear floor panel 10 constitutes a floor at the rear of the vehicle body, and is formed by pressing an open bathtub-shaped recess 12. The recess 12 may be used as a spare tire house that accommodates a spare tire, or may be used as a space that accommodates a drive battery unit (IPU: Intelligent Power Unit) or the like instead of the spare tire. Further, the recess 12 is partitioned up and down or front and back by a partition member arranged at an appropriate position, and the divided storage chamber is used as a storage chamber for tools, jacks, etc., or a storage chamber for puncture repair kits, for example. Good.

  Left and right rear side frames 14 extend in the front-rear direction on both left and right sides of the rear portion of the vehicle body with the recess 12 interposed therebetween. The rear side frame 14 has a hat-shaped cross-sectional shape, and both flanges are joined to the rear floor panel 10 of the recess 12 to form a closed cross-sectional shape in cooperation with the rear floor panel 10. As shown in FIG. 1, the left and right rear side frames 14 are joined at the front end to the rear end of the corresponding side sill 18, and bend toward the side closer to each other behind the joint with the side sill 18. Further, they extend in parallel to each other behind the curved portion 14A, and demarcate regions constituting left and right rear tire houses on the outer sides of the curved portions 14A.

  As shown in FIGS. 1 and 2, the rear side frame 14 is formed by a joined body of a front member 20 in front of a rear floor middle cross member 26 described later and a rear member 22 in rear of the rear floor middle cross member 26. It is configured. The joint A between the front member 20 and the rear member 22 is located at substantially the same position as the position of the rear floor middle cross member 26 in the front-rear direction. The rear member 22 is configured to have a lower bending strength than the front member 20. In other words, the front member 20 has a higher bending strength than the rear member 22. This strength difference can be set by the difference in the plate thickness between the front member 20 and the rear member 22 or the difference in the steel material.

  An end of a rear floor cross member 24 extending in the vehicle width direction is joined to the curved portion 14A of the rear side frame 14. The rear floor cross member 24 is spanned between the left and right rear side frames 14 to connect the left and right rear side frames 14 to each other.

  Near the joint between the front member 20 and the rear member 22 in the parallel portions 14B of the left and right rear side frames 14, the ends of the rear floor middle cross member 26 extending in the vehicle width direction are joined. The rear floor middle cross member 26 is spanned between the left and right rear side frames 14 to connect the left and right rear side frames 14 to each other. The rear floor middle cross member 26 is located behind the rear floor cross member 24.

  The rear floor cross member 24 and the rear floor middle cross member 26 each have a hat-shaped cross-sectional shape, and are closed in cross-section in cooperation with the rear floor panel 10 by joining both flanges to the lower bottom surface of the rear floor panel 10. Form a shape. The rear floor middle cross member 26 has a staple shape following the outer shape of the recess 12.

  FIG. 3 is a perspective view of the rear structure of the vehicle body as viewed obliquely from the upper front, and FIG. 4 is an enlarged view of the main part of FIG. 3 through a rear inner panel 32 and a left garter outer panel 34 described later. FIG. As shown in FIGS. 3 and 4, a rear panel that extends in the vehicle width direction along the rear end of the rear floor panel 10 and that is joined to the rear end of the rear side frame 14 on both the left and right sides. (Rear floor end cross member) 28 is provided. The rear panel 28 includes a rear outer panel 30 and a rear inner panel 32 (see FIG. 5) joined to each other, and left and right garter outer panels 34 and garter inners joined to the left and right sides of the rear outer panel 30 and the rear inner panel 32 and joined to each other. And a horizontal portion of the panel 36. The rear panel 28 has a closed cross-sectional shape by these, and forms a lower skeleton of the tailgate opening. The tailgate opening is opened and closed by a flip-up tailgate (not shown).

  As shown in FIGS. 1 and 2, a box member 38 is provided at the center of the rear floor panel 10 in the vehicle width direction. As shown in FIG. 5, the box member 38 has a vertical wall portion 30 </ b> A of the rear outer panel 30 and a corner with the bottom wall portion 30 </ b> B bent so as to extend rearward at the upper end of the vertical wall portion 30 </ b> A. A box outer member 40 joined to the corner portion, and a box inner member 42 whose upper side is joined to the vertical wall portion 30A and whose lower side is overlapped and joined to the lower side of the box outer member 40, and is constituted by a rear outer panel. A box structure 43 having a box shape is formed in cooperation with 30.

  The box member 38 hangs downward from the rear end of the rear floor panel 10. The overlapping joint portion between the box outer member 40 and the box inner member 42 forms a bottom portion of the box member 38 at a position protruding downward from the rear end of the rear floor panel 10, and the bottom portion forms a jack-up portion 44. Further, the box member 38 has tie-down hook engaging holes 46 and 48 formed in the above-described overlapping joint portion and the rear wall 40A of the box outer member 40 to form a tie-down hook attachment portion. More specifically, a corner formed by the rear wall 40A and the bottom formed between the engagement holes 46 and 48 forms a hook engaging portion for engaging the tie-down hook.

  As shown in FIG. 4, in the center of the vehicle crosswise direction inside the closed cross section by the rear outer panel 30 and the rear inner panel 32, a first bulk for reinforcement of the portion is provided at a position corresponding to the box member 38. The head member 50 is joined. Further, in a position within the closed cross section by the horizontal portion of the garter outer panel 34 and the garter inner panel 36 and spaced from the first bulkhead member 50 to the left and right, it is orthogonal to the vehicle width direction in order to reinforce the portions. The left and right second bulkhead members 51 provided in the are joined together.

  As shown in FIGS. 1 and 2, the center of the recess 12 in the vehicle width direction extends in the front-rear direction along the lower bottom surface of the recess 12, and the front end is joined to the rear floor middle cross member 26. A rear center member 52 having a rear end joined to the box member 38 is provided. The rear center member 52 includes a front member 54 including a joint portion with the rear floor middle cross member 26, and a front end is joined to the rear end of the front member 54, and the box is bent from the front member 54 according to the bottom shape of the recess 12. The intermediate member 56 extends to the vicinity of the member 38, and the rear member 58 is joined to the rear end of the intermediate member 56 at the front end and extends from the intermediate member 56 to the joint portion with the box member 38. .

  The front member 54 and the rear member 58 have higher bending strength than the intermediate member 56, and the intermediate member 56 has lower bending strength than the front member 54 and the rear member 58. This strength difference can be set by the difference in the plate thickness of these members or the difference in the steel material.

  Next, the peripheral structure of the jack-up portion 44 and the tie-down hook mounting portion will be described in detail.

  As shown in FIGS. 5 to 7, the box outer member 40 has a rear wall 40 </ b> A inclined forward and a bottom bent to extend forward at the lower edge of the rear wall 40 </ b> A. A wall 40B and left and right side walls 40C bent to extend forward at the left and right side edges of the rear wall 40A are provided. The rear wall 40A includes an upper end joint portion 40D that is bent so as to extend further upward at the upper edge and is joined to the rear wall portion 30C that forms the rear surface of the rear panel 28 of the rear outer panel 30. The side wall 40C is bent so as to extend further left and right at the front edge and the upper edge, and is joined to the vertical wall portion 30A and the bottom wall portion 30B of the rear outer panel 30 (FIG. 2) in succession to the upper end joint portion 40D. The left and right side wall joint portions 40E are provided.

  As described above, the engagement hole 48 is formed in the rear wall 40A. The bottom wall 40B is divided into left and right portions so as to form the engagement holes 48 described above. Left and right ribs 40F extending in the vertical direction are formed at the connecting portion between the rear wall 40A and the left and right side walls 40C so as to protrude rearward. As shown in FIG. 5, the box outer member 40 is generally L-shaped by a rear wall 40 </ b> A and a bottom wall 40 </ b> B in a cross section cut in the vertical direction.

  The box inner member 42 extends in a substantially vertical direction so as to extend the vertical wall portion 30A of the rear outer panel 30 downward, and has a front wall 42A joined to the vertical wall portion 30A of the rear outer panel 30 and a front wall. The bottom wall 42B is bent so as to extend rearward at the lower edge of 42A, and the left and right side walls 42C are bent so as to extend rearward at the left and right side edges of the front wall 42A. ing.

  The bottom wall 42B and the left and right side walls 42C of the box inner member 42 are continuous, and the bottom wall 42B is divided into left and right sides so as to form the engagement holes 48 described above. As shown in FIG. 5, the box inner member 42 is generally L-shaped by a front wall 42 </ b> A and a bottom wall 42 </ b> B in a cross section cut in the vertical direction. The bottom wall 42B and the left and right side walls 42C of the box inner member 42 are joined to the corresponding bottom wall 40B and the left and right side walls 40C of the box outer member 40.

  Thus, the box inner member 42 and the box outer member 40 are joined to each other with the bottom walls 42B and 40B being overlapped with each other to form the box member 38, and the box member 38 is joined to the rear panel 28. Thus, the box structure portion 43 is formed.

  As described above, the vertical wall portion 30A of the rear outer panel 30 and the front wall 42A of the box inner member 42 extend substantially vertically, while the rear wall 40A of the box outer member 40 is inclined forward and downward. . Therefore, the box structure portion 43 has an inverted trapezoidal shape in which the length in the longitudinal direction of the vehicle body is the same as that of the lower portion of the rear panel 28 at the top and gradually shortens downward. A hook mounting portion is formed.

  As shown in FIG. 6, the rear end (rear member 58) of the rear center member 52 is located below the front wall 42 </ b> A of the box inner member 42 and the left and right sides of the box outer member 40 in the box structure portion 43. It joins to the lower part of the side wall joint 40E.

  As shown in FIG. 4, the first bulkhead member 50 is provided inside the closed cross section of the rear outer panel 30 and the rear inner panel 32 so as to be orthogonal to the vehicle width direction, and is a pair of bulks that reinforce the rear panel 28. A head 50A, a top wall 50B that connects the upper parts of the pair of bulkheads 50A, and a front wall 50C that connects the front part of the pair of bulkheads 50A and the front part of the upper wall 50B are integrally formed into a box shape. It is configured.

  As shown in FIG. 5, the front wall 50C of the first bulkhead member 50 is joined to the vertical wall portion 30A of the rear outer panel 30 at the lower end, and the pair of bulkheads 50A are connected to the rear outer panel 30 at the rear end. To the rear wall 30C. Further, the upper wall 50B of the first bulkhead member 50 is joined to the upper wall portion 32A of the rear inner panel 32. As a result, the first bulkhead member 50 forms a box structure in cooperation with the rear outer panel 30 constituting the outer portion of the rear panel 28. The upper wall 50B of the first bulkhead member 50 serves as a fixing part for fixing the striker for locking the tailgate.

  As shown in FIGS. 4 to 6, the first bulkhead member 50 is disposed at a position overlapping the box structure portion 43 in the vehicle width direction and the front-rear direction. In other words, the first bulkhead member 50 and the box structure portion 43 overlap each other in the vehicle width direction and the front-rear direction, whereby the first bulkhead member 50 is located above the box structure portion 43 in the box structure portion 43. A continuous box structure is formed.

  According to the rear structure of the vehicle body configured as described above, the following operational effects can be obtained.

  That is, as shown in FIG. 2, a closed cross-section rear panel 28 disposed along the rear end of the rear floor panel 10, and a box structure that is formed below the rear panel 28 and forms a box shape in cooperation with the rear panel 28. Part 43, and at least one of a jack-up part 44 and engagement holes 46, 48 for tie-down hooks is formed at the bottom of the box structure part 43. Therefore, the engagement holes 46 and 48 for the tie-down hook and the jack-up portion 44 can be arranged at a lower position below the rear panel 28. The upward compressive load due to jack-up and the downward tensile load due to tie-down are supported by the rear panel 28 having high rigidity.

  As shown in FIG. 5, the length of the box structure portion 43 in the longitudinal direction of the vehicle body has the same length as that of the lower portion of the rear panel 28 at the upper portion, and gradually decreases downward. A jack-up portion 44 and engagement holes 46 and 48 for tie-down hooks are formed. Therefore, the upward compressive load due to jack-up and the downward tensile load due to tie-down are concentrated on the bottom of the box structure 43 having a short length in the front-rear direction of the vehicle body and dispersed throughout the rear panel 28 in the front-rear direction. And transmitted directly to the vertical wall of the rear panel 28 that is strong against compressive loads and tensile loads. Thereby, stress concentration in the rear panel 28 is prevented.

  As shown in FIGS. 3 and 4, the rear panel 28 forms a lower skeleton of the tailgate opening, and at least one bulkhead 50 </ b> A that is perpendicular to the vehicle width direction inside the rear panel 28 and reinforces the rear panel 28, and the bulkhead An upper wall 50B that is formed integrally with 50A and forms a fixing portion of a lock striker for the tailgate is provided. Therefore, the rigidity of the rear panel 28 is increased, and the support rigidity of the rear panel 28 against the compressive force and the tensile force is increased. In addition, the support strength of the striker for locking the tailgate is increased.

  As shown in FIG. 4, a first bulkhead member 50 is provided inside the rear panel 28 so as to be orthogonal to the vehicle width direction, and a pair of bulkheads 50 </ b> A that reinforce the rear panel 28 and a pair of bulkheads. The upper wall 50B for connecting the upper part of 50A and the front wall 50C for connecting the front part of the pair of bulkheads 50A and the front part of the upper wall 50B are integrally formed and cooperate with the rear outer panel 30. The box structure is formed. Further, as shown in FIGS. 5 and 6, the first bulkhead member 50 is disposed at a position overlapping the box structure portion 43 in the vehicle width direction and the front-rear direction. With these configurations, the first bulkhead member 50 forms a box structure continuous with the box structure portion 43 above the box structure portion 43. Therefore, the load from the lower box structure portion 43 is reliably supported by the portion of the rear panel 28 forming the box structure. That is, the rigidity of the rear panel 28 is increased, and the support rigidity of the rear panel 28 against the compressive force or tensile force is also increased. In addition, since the first bulkhead member 50 forms a box structure, it is easy to place the first bulkhead member 50 on the rear outer panel 30 or to join it by welding or the like.

  2 and 7, the rear center member 52 is provided so as to extend in the front-rear direction along the lower surface of the rear floor panel 10, and the rear center member 52 is joined to the lower portion of the box structure portion 43. Yes. Therefore, the support rigidity of the box structure part 43 with respect to the tensile force from the diagonally lower rear due to the tie-down increases.

  5-7, the box structure 43 includes a box outer member 40 having a rear wall 40A, a bottom wall 40B, and left and right side walls 40C, and a box inner member having a front wall 42A and a bottom wall 42B. A member 42 is formed by joining the bottom walls 42B and 40B to each other and joining each other, and joining the rear outer panel 30 constituting the outer portion of the rear panel 28. As described above, the bottom wall 42B of the box inner member 42 and the bottom wall 40B of the box outer member 40 are formed to be combined, so that the rigidity of the bottom portion of the box structure portion 43 forming the load supporting portion is increased. . Moreover, since the structure of the box inner member 42 and the box outer member 40 is simple, the joining operation | work of both members is easy.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, the specific configuration, arrangement, quantity, material, and the like of each member and part can be changed as appropriate without departing from the spirit of the present invention. On the other hand, not all the constituent elements shown in the above embodiment are necessarily essential, and can be appropriately selected.

10 Rear floor panel 28 Rear panel (rear panel frame)
30 Rear outer panel 32 Rear inner panel 38 Box member 40 Box outer member (rear L-shaped member)
40A Rear wall 40B Bottom wall 40C Side wall 42 Box inner member (front L-shaped member)
42A Front wall 42B Bottom wall 43 Box structure 44 Jack-up part 46, 48 Engagement hole (tie-down hook attachment part)
50 First bulkhead member (box-shaped reinforcing member)
50A Bulkhead 50B Upper wall (Strike fixing part)
50C Front wall 52 Rear center member (vertical member)

Claims (4)

A rear panel skeleton having a rear outer panel and a rear inner panel which are provided so as to extend in the vehicle width direction along the rear end of the rear floor panel and are joined to each other to form a closed section;
A box structure portion formed below the rear panel skeleton and having a box shape in cooperation with the rear panel skeleton;
A jack-up portion and a tie-down hook mounting portion are formed at the bottom of the box structure portion ,
The length of the box structure in the longitudinal direction of the vehicle body is the same as the length of the lower part of the rear panel frame at the upper part, and gradually decreases downward.
A vertical member extending in the front-rear direction along the lower surface of the rear floor panel;
The rear structure of the vehicle body, wherein the vertical member is joined to a lower portion of the box structure. The rear panel skeleton is the lower skeleton of the tailgate opening,
At least one bulkhead provided inside the rear panel frame so as to be orthogonal to the vehicle width direction and reinforcing the rear panel frame;
The rear structure of the vehicle body according to claim 1, further comprising a striker fixing portion that is formed integrally with the bulkhead and forms a fixing portion of a tailgate locking striker. A pair of bulkheads which are provided inside the rear panel frame so as to be orthogonal to the vehicle width direction, reinforce the rear panel frame, upper walls connecting upper portions of the pair of bulkheads, and the pair of bulkheads A box-shaped reinforcing member that forms a box structure in cooperation with the rear outer panel.
The vehicle body rear structure according to claim 1 or 2 , wherein the box-shaped reinforcing member and the box structure portion overlap each other in the vehicle width direction and the front-rear direction. In the box structure, a front L-shaped member having a front wall and a bottom wall and a rear L-shaped member having a rear wall, a bottom wall, and left and right side walls are joined to each other with the respective bottom walls overlapped. The rear structure of the vehicle body according to any one of claims 1 to 3 , wherein the rear structure is formed by being joined to the rear outer panel.

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