JP2018162012A - Vehicle rear part structure - Google Patents

Abstract

A boundary portion between a passenger compartment and a cargo compartment can be reinforced without being restricted by the layout of the cargo compartment space or the cargo compartment floor structure. A partition member 40 reinforces a boundary portion between a passenger compartment and a cargo compartment, which is constituted by a floor panel 10, a quarter pillar 13, and a cabin back panel 14. A rear floor cross member 20 is joined to the floor panel 10, an upper part of the partition member 40 is joined to the cabin back panel 14, and a lower part of the partition member 40 is joined to the rear floor cross member 20 via the bracket 30. The rear floor cross member 20 is disposed on the front side of the partition member 40. [Selection] Figure 2

Description

  The present invention relates to a vehicle rear structure.

  At the boundary between the passenger compartment and the cargo compartment of the vehicle, for example, as disclosed in Patent Document 1, an upper back is installed between the left and right pillars above the tire house vehicle. A structure in which the boundary portion includes a floor panel, left and right pillars, an upper back, and the like is known.

  In order to reinforce the boundary portion, a brace member is provided so as to bridge between the upper back and the floor panel. The lower end of the brace member is fastened to the floor with a bolt or the like, and the upper end is fastened to the upper back with a bolt or the like. By providing the brace member in this manner, deformation of the boundary portion that is an annular structure is suppressed, and the vehicle body rigidity is improved.

JP-A-11-78984

  By joining the lower end of the brace member to a highly rigid member such as a frame constituting the vehicle body skeleton, the rigidity can be efficiently secured. However, there may be restrictions on the landing point of the brace member due to the common platform and layout.

  On the other hand, the rigidity of the joining part of the lower end of a brace member can also be improved by attaching a cross member with high rigidity on a floor panel, and joining the lower end of a brace member to a cross member.

  However, in such a structure, there is a possibility that the space of the luggage compartment is reduced or the layout of the recess (spare tire house) at the lower part of the cargo compartment is restricted.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a boundary between a passenger compartment and a cargo compartment of a vehicle, which is restricted by the layout of the cargo compartment space and the cargo compartment floor structure. Without providing a vehicle rear structure that can be reinforced.

  In order to achieve the above object, a vehicle rear structure according to the present invention is reinforced by a partition member in which a boundary portion between a passenger compartment of a vehicle and a cargo compartment disposed in the rear of the passenger compartment extends in the vehicle vertical direction. The boundary portion is arranged in the vehicle width direction so as to be installed between the floor panel, pillars disposed on both sides of the floor panel in the vehicle width direction and extending in the vehicle vertical direction, and between the pillars in the vehicle width direction. The cabin back panel extends. In the vehicle rear structure, a rear floor member extending in the vehicle width direction is joined to the floor panel positioned at the boundary, and an upper portion of the partition member is joined to the cabin back panel, The lower part is joined to the rear floor member via a bracket, and the rear floor member is disposed on the vehicle front side of the partition member.

  With the vehicle rear structure according to the present invention, it is possible to reinforce the boundary between the passenger compartment and the cargo compartment of the vehicle without being restricted by the layout of the cargo compartment space or the cargo compartment floor structure. .

1 is a perspective view of an embodiment of a vehicle rear portion structure according to the present invention, in which the periphery of a boundary portion is viewed from the front of the vehicle. It is the perspective view which looked at the periphery of the boundary part of FIG. 1 from the vehicle back. (A) is a schematic sectional drawing which shows typically the AA cross section of FIG. 1, (b) is a schematic sectional drawing which shows the comparative example of FIG. It is an expansion perspective view which shows the joining state of the lower part of the partition member of FIG. It is the perspective view which looked at the lower part etc. of the partition member of FIG. 4 from the vehicle front. It is a perspective view which shows the state before a partition member is attached to the bracket of FIG. It is the perspective view which looked at the bracket of FIG. 6 etc. from the vehicle front. FIG. 3 is an enlarged perspective view of the periphery of the patch in FIG. 2 and shows the positional relationship between the patch and the side frame.

  Hereinafter, an embodiment of a vehicle rear structure according to the present invention will be described with reference to the drawings (FIGS. 1 to 8).

  The vehicle rear portion structure of the present embodiment is a structure in which a partition member 40 reinforces a boundary portion between a passenger compartment of the vehicle and a luggage compartment disposed behind the passenger compartment in the vehicle. The partition member 40 is a member that partitions the passenger compartment and the cargo compartment, and constitutes a boundary portion. The vehicle front side of the partition member 40 is a passenger compartment, and the vehicle rear side is a cargo compartment.

  Further, as shown in FIGS. 1 and 2, the boundary portion includes a floor panel 10 that constitutes a floor portion of the vehicle body, a quarter pillar (pillar) 13, and a cabin back panel 14. An annular structure having a central axis is formed. The vehicle front-rear direction position of the boundary portion of the present embodiment corresponds to the position of the middle part of the vehicle front-rear direction position of the rear tire house portion 15.

  A rear tire is disposed below the vehicle in the rear tire house portion 15. The rear tire house 15 is formed so as to cover the upper half of the rear tire from above the vehicle and from the inside in the vehicle width direction, and bulges into the passenger compartment and the cargo compartment.

  Here, the floor panel 10 will be described. As shown in FIG. 1, the floor panel 10 of the present embodiment constitutes a first floor panel 11 constituting a floor portion of the passenger compartment, a floor portion of the cargo compartment, and a floor portion on the rear side of the passenger compartment. The second floor panel 12 is provided. The rear part of the first floor panel 11 and the front part of the second floor panel 12 are joined. The front end of the second floor panel 12 in this example is disposed on the passenger compartment side. That is, the boundary portion is disposed at the front portion of the second floor panel 12.

  As shown in FIGS. 1 and 2, the rear portion of the first floor panel 11 and the front portion of the second floor panel 12 are disposed near the center of the rear tire house portion 15 in the vehicle front-rear direction. The second floor panel 12 has a spare tire house portion 17. The spare tire house portion 17 is adjacent to the front end portion of the second floor panel 12 and is disposed slightly to the left of the panel center (vehicle width direction center).

  As shown in FIG. 2, the spare tire house portion 17 has a concave shape that is recessed downward in the vehicle. The rear part of the spare tire house part 17 is open to the rear of the vehicle. The rear end of the second floor panel 12 has a hat shape that protrudes downward from the vehicle.

  As shown in FIGS. 1 and 2, the quarter pillars 13 are disposed on both sides of the second floor panel 12 in the vehicle width direction. The quarter pillar 13 is a metal member extending upward from the upper portion of the rear tire house portion 15.

  The cabin back panel 14 of the present embodiment is a member constituting the rear surface of the passenger compartment, and extends in the vehicle width direction as shown in FIG. The cabin back panel 14 is disposed so as to be installed between the quarter pillars 13 on both sides in the vehicle width direction, and connects the upper portions of the quarter pillars 13 on both sides in the vehicle width direction.

  The boundary portion of the present embodiment has a rear floor cross member (rear floor member) 20. The rear floor cross member 20 is a metal member, and as shown in FIGS. 1 and 2, the rear floor cross member 20 is disposed between the rear tire house portions 15 on both sides in the vehicle width direction and extends in the vehicle width direction. It is. The rear floor cross member 20 is joined to the front end portion of the second floor panel 12. That is, the rear floor cross member 20 is disposed on the passenger compartment side with respect to the boundary portion.

  The rear floor cross member 20 includes an upper surface portion 21 that extends in the vehicle width direction, a rear surface portion (vertical surface) 22 that protrudes downward from the rear end of the upper surface portion 21 and extends in the vehicle width direction, and an upper surface portion 21. It has a front surface portion 23 that projects downward from the front end and extends in the vehicle width direction. Further, a flange portion 22 a protruding rearward is provided at the lower end of the rear surface portion 22, and a flange portion 23 a is also provided at the lower end of the front surface portion 23. That is, the cross section (cross section perpendicular to the vehicle width direction) of the rear floor cross member 20 has a hat shape that opens downward from the vehicle and protrudes upward from the vehicle. The rear surface portion 22 extends so as to stand up with respect to the upper surface of the second floor panel 12.

  Next, the partition member 40 will be described. The boundary portion is reinforced by two partition members 40. As shown in FIG. 4, each partition member 40 is a metal member extending in the vehicle vertical direction. In this example, the vehicle is inclined inward in the vehicle width direction toward the upper side of the vehicle. The two partition members 40 function as struts that reinforce the boundary portions, and are arranged so as to approach each other as they move upward in the vehicle.

  As shown in FIG. 1, each partition member 40 includes a main surface portion 41 facing the front of the vehicle and side portions 42 protruding forward from the both sides of the main surface portion 41 in the vehicle width direction. Yes. That is, the cross section (transverse cross section) perpendicular to the longitudinal direction of the partition member 40 is a hat shape including the main surface portion 41 and both side portions 42.

  The upper part of the main surface portion 41 of the partition member 40 is joined to the front surface of the cabin back panel 14. An upper bolt hole (not shown) penetrating in the vehicle front-rear direction is formed in the upper portion of the main surface portion 41 of the partition member 40.

  On the other hand, two panel-side bolt holes (not shown) are formed on the front surface of the cabin back panel 14 so as to correspond to the upper bolt holes and are spaced from each other in the vehicle width direction. Bolts are inserted into these panel-side bolt holes, and the upper portions of the main surface portions 41 of the partition members 40 and the front surface of the cabin back panel 14 are fastened by bolts and nuts.

  As shown in FIG. 2, the lower portion of the main surface portion 41 of each partition member 40 is joined to the floor panel via the rear floor cross member 20 and the bracket 30. Specifically, the lower portion of the main surface portion 41 is joined to the bracket 30, and the bracket 30 is joined to the rear portion of the rear floor cross member 20. Further, the rear floor cross member 20 is joined to the front end portion of the second floor panel 12 as described above.

  In the present embodiment, as shown in FIG. 3A, the rear floor cross member 20 is disposed on the vehicle front side of the bracket 30 and the partition member 40. That is, the bracket 30 and the partition member 40 are joined to the rear part of the rear floor cross member 20.

  As shown in FIG. 3B, when the rear floor cross member 20 is disposed on the vehicle rear side of the partition member 40 and the partition member 40 is attached to the front side of the rear floor cross member 20, the rear floor cross member 20 is It will be arranged on the cargo room side. In this case, the length in the vehicle front-rear direction of the cargo space is reduced by the width of the rear floor cross member 20 in the vehicle front-rear direction. 3A and 3B, the position of the partition member 40 in the vehicle front-rear direction is the same, and the position of the rear end 10e of the luggage compartment in the vehicle front-rear direction is also the same.

  On the other hand, in this embodiment, since it is set as the above arrangement | positioning (FIG. 3 (a)), the reduction | decrease of the luggage compartment space by the vehicle front-back direction width | variety of the rear floor cross member 20 can be prevented. As a result, the boundary portion can be reinforced without being restricted by the layout of the luggage compartment space or the cargo compartment floor structure.

  Here, the bracket 30 will be described. In the bracket 30, one bracket 30 is joined to each of the two partition members 40. That is, in this embodiment, the two brackets 30 are provided.

  Each bracket 30 is a member extending in the vehicle width direction, and includes a main body portion 31, an outer flange portion 32, and a lower flange portion 33. The main body 31 has a plate shape extending in the vehicle width direction, and further includes side walls 31a protruding forward of the vehicle on both sides in the vehicle width direction. A bracket-side bolt hole (not shown) penetrating in the vehicle front-rear direction is formed at the center of the body portion 31 in the vehicle width direction.

  The outer flange portion 32 projects outward in the vehicle width direction from the front end of the side wall 31 a of the main body portion 31. The lower flange portion 33 extends from the lower end of the main body portion 31 and the lower end of the outer flange portion 32 in the vehicle width direction in a state of projecting rearward of the vehicle. The bracket 30 of this example has a U-shape that opens forward of the vehicle as viewed from above the vehicle.

  The main body portion 31 of each bracket 30 is disposed on the rear side of each partition member 40 in the vehicle, and the front surface of the main body portion 31 and the rear surface of the main surface portion 41 are joined. Hereinafter, the joining of the main body portion 31 and the main surface portion 41 will be described.

  A stud bolt 38 (engagement portion) is inserted into the bracket side bolt hole of the main body portion 31 of the bracket 30. The stud bolt 38 projects forward from the front surface of the main body 31. On the other hand, a lower bolt hole (through hole) 41 a penetrating in the vehicle front-rear direction is formed in the lower portion of the main surface portion 41 of the partition member 40.

  Further, the rear floor cross member 20 has two concave portions 25 as shown in FIG. These concave-shaped portions 25 are arranged on the upper part of the rear floor cross member 20 at intervals in the vehicle width direction so as to correspond to the mounting positions of the partition members 40. As for each concave shape part 25, the upper end part 21 and the upper end of the front surface part 23 and the rear surface part 22 are dented below the vehicle.

  Each concave-shaped part 25 is extended in the vehicle front-back direction so that the rear floor cross member 20 may be crossed, and the front surface part 23 and the rear surface part 22 are opened ahead and back of the vehicle. That is, the concave portion 25 penetrates between the front surface portion 23 and the rear surface portion 22 in the vehicle front-rear direction.

  Here, the arrangement of the stud bolts 38 will be described. As shown in FIGS. 6 and 7, the stud bolt 38 passes through the bracket side bolt hole and the lower side bolt hole 41 a and is disposed inside the concave portion 25. In this state, as shown in FIG. 5, a nut 39 is screwed onto the stud bolt 38 at the front portion of the main surface portion 41, and the rear surface of the main surface portion 41 and the front surface (inner surface) of the main body portion 31 are bolted. Has been.

  As shown in FIG. 6, the outer flange portion 32 is joined to the rear surface portion 22 of the rear floor cross member 20 by spot welding or the like. Further, the lower flange portion 33 is joined to the upper surface of the flange portion 22 a at the lower end of the rear surface portion 22. The lower portion of the partition member 40 is surrounded by the main body portion 31, the outer flange portions 32 on both sides in the vehicle width direction, and the rear surface portion 22 of the rear floor cross member 20.

  By providing a plurality of joints on the bracket 30, it is possible to transmit the input from the partition member 40 to the rear floor cross member 20 while securing the component strength. Furthermore, when the bracket 30 has a U-shape when viewed from the top of the vehicle, the outer flange portion 32 constituting both sides of the U-shape can receive an input load to the partition member 40. As a result, deformation of the bracket 30 can be suppressed.

  As shown in FIG. 4, the vehicle vertical direction position where the partition member 40 and the main body 31 are joined is the same as or lower than the vehicle vertical direction position where the rear surface part 22 and the outer flange part 32 are joined. Has been placed. In other words, the fastening position by the stud bolt 38 is the same as or below the vehicle with respect to the welding point of the outer flange portion 32.

  Due to the positional relationship of the joints, the rigidity is increased against deformation that causes the partition member 40 to fall backward in the vehicle. As a result, the outer flange portion 32 of the bracket 30 can be prevented from separating from the rear surface portion 22 of the rear floor cross member 20.

  Moreover, since the stud bolt 38 is arrange | positioned inside the concave shape part 25 as shown in FIGS. 5-7, the attachment operation | work of the nut 39 can be performed from the vehicle front side, and since the said operation | work is easy, Work efficiency is improved. Moreover, since the recessed part 25 is provided in the rear floor cross member 20 and the height of the attachment part of the stud bolt 38 can be made as low as possible, the effect of suppressing the peeling load of the bracket 30 is also enhanced.

  As shown in FIG. 3B, when the partition member 40 is attached to the front surface portion 23 of the rear floor cross member 20, the attachment work becomes easy, but there is a problem in the layout as described above. . On the other hand, even if the partition member 40 is attached to the rear part of the rear floor cross member 20 by providing the concave portion 25 and the like as in the present embodiment, the efficiency of the attachment work is not lowered.

  Further, as shown in FIG. 2, a patch 50 is attached to the upper surface of the second floor panel 12. The patch 50 is a metal member for reinforcing the surface rigidity of the second floor panel 12. As shown in FIG. 8, the patch 50 is a member extending in the vehicle width direction, and has a plate-like main portion 51 joined to the second floor panel 12 and a front end of the main portion 51 above the vehicle. It has an overhanging vertical wall 52.

  The main portion 51 is joined to the second floor panel 12 by welding or the like while being sandwiched between a portion of the lower flange portion 33 of the bracket 30 close to the vehicle width direction outer side and the upper surface of the second floor panel 12. Has been. The vertical wall portion 52 is sandwiched between the outer flange portion 32 of the outer flange portion 32 of the bracket 30 that is closer to the vehicle width direction outer side and the rear surface portion 22 of the rear floor cross member 20. It is joined.

  On the other hand, as shown in FIGS. 7 and 8, a pair of side frames 19 extending in the vehicle front-rear direction are disposed on both outer sides in the vehicle width direction on the lower surface of the second floor panel 12. . The side frame 19 is a metal member and is a highly rigid member that constitutes the skeleton of the vehicle body. The patch 50 extends from the joint portion with the second floor panel 12 and the joint portion with the rear floor cross member 20 toward the outer side in the vehicle width direction, and the outer end portion in the vehicle width direction of the patch 50 overlaps the side frame 19. Are arranged as follows.

  By transmitting the input from the partition member 40 to the floor panel, the stress can be effectively dispersed. Furthermore, since the patch 50 extends to the highly rigid side frame 19, it is possible to effectively suppress stress concentration on the bracket 30 of the partition member 40.

  The vehicle rear part structure of this embodiment has four child seat anchors 55 as shown in FIGS. Each child seat anchor 55 is attached to the upper part of the rear floor cross member 20 with a space in the vehicle width direction. Two adjacent child seat anchors 55 are configured to make a pair. A bracket 30 is disposed between the pair of child seat anchors 55 in the vehicle width direction.

  For example, when a load that pulls the rear floor cross member 20 forward of the vehicle acts via the child seat anchor 55 at the time of a vehicle collision, the partition member 40 can suppress the action of the load.

  As can be seen from the above description, according to the present embodiment, the boundary between the passenger compartment and the cargo compartment of the vehicle is effectively prevented without being restricted by the layout of the cargo compartment space or the cargo compartment floor structure. It can be reinforced.

  The description of the present embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

  In the embodiment described above, the single rear floor cross member 20 extending in the vehicle width direction is provided so as to connect the ends on both outer sides in the vehicle width direction, but this is not a limitation. For example, two members extending in the vehicle width direction may be arranged at an interval in the vehicle width direction. In this case, one bracket 30 is attached to each member. In addition, child seat anchors 55 are disposed on both sides of each bracket 30.

10 Floor panel 11 First floor panel 12 Second floor panel 13 Quarter pillar (pillar)
14 Cabin back panel 15 Rear tire house part 17 Spare tire house part 19 Side frame 20 Rear floor cross member 21 Upper surface part 22 Rear surface part (vertical surface)
22a Head part 23 Front part 23a Head part 25 Concave part 30 Bracket 31 Main body part 31a Side wall 32 Outer flange part 33 Lower flange part 38 Stud bolt (engagement part)
39 Nut 40 Partition member 41 Main surface portion 41a Lower bolt hole (through hole)
42 Side 50 Patch 51 Main part 52 Vertical wall part 55 Child seat anchor

Claims (6)

The boundary between the passenger compartment of the vehicle and the luggage compartment disposed behind the passenger compartment is reinforced by a partition member extending in the vehicle vertical direction,
The boundary portion extends in the vehicle width direction so as to be laid between the floor panel, pillars disposed on both sides of the floor panel in the vehicle width direction and extending in the vehicle vertical direction, and between the pillars in the vehicle width direction. In the vehicle rear structure, which is constituted by the cabin back panel
A rear floor member extending in the vehicle width direction is joined to the floor panel located at the boundary,
The upper part of the partition member is joined to the cabin back panel,
The lower part of the partition member is joined to the rear floor member via a bracket,
The vehicle rear structure, wherein the rear floor member is disposed on the vehicle front side of the partition member. A vertical surface extending above the vehicle is formed at the rear of the rear floor member,
The bracket has a main body portion provided with a side wall projecting forward of the vehicle on both sides in the vehicle width direction, and an outer flange portion provided at a vehicle front portion of each side wall,
The lower part of the partition member is joined to the main body part, and the outer flange part is joined to the vertical surface of the rear floor member,
The vehicle rear portion structure according to claim 1, wherein the partition member is surrounded by the main body portion, the outer flange portions, and the vertical surface of the rear floor member.   The vehicle vertical direction position where the partition member and the main body part are joined is the same as or lower than the vehicle vertical direction position where the vertical surface and the flange part are joined. The vehicle rear portion structure according to claim 2. The main body portion of the bracket has an engaging portion protruding forward of the vehicle,
A through hole is formed in the lower part of the partition member,
On the upper part of the floor member, a concave shaped part is provided that is recessed below the vehicle.
4. The partition member and the bracket are joined in a state in which the engaging portion passes through the through hole and is disposed inside the concave portion. The vehicle rear part structure according to any one of the above. The bracket has a lower flange portion provided at a lower portion of the main body portion,
On both outer sides in the vehicle width direction on the lower surface of the floor panel, side frames extending in the vehicle front-rear direction are arranged as a pair,
A patch for reinforcing the surface rigidity of the floor panel is attached to the upper surface of the floor panel,
The patch is joined in a state of being sandwiched between the lower flange portion on the outer side in the vehicle width direction and the floor panel,
The said patch is extended in the vehicle width direction from the junction part of the said patch and the said lower side flange part to the position which overlaps with the said side frame, The Claim 1 thru | or 4 characterized by the above-mentioned. The vehicle rear structure as described. The rear floor member extends in the vehicle width direction,
Two child seat anchors are attached to the rear floor member in a state spaced from each other in the vehicle width direction,
The vehicle rear structure according to any one of claims 1 to 5, wherein the bracket is arranged between the two child seat anchors in the vehicle width direction.

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