JP2016107789A - Rear vehicle body structure of automobile - Google Patents

Abstract

The present invention provides a rear vehicle body structure capable of suppressing the inward tilting of a wheel house without increasing the number of members even when a damper support portion is largely separated from a pillar portion rearward. SOLUTION: A lower pillar portion 21 extending in a vertical direction at a front portion from a damper support portion 13x on a vehicle inner side surface 13z of a wheel house 13, and a vertical direction at a rear portion from a damper support portion 13x of the vehicle inner side surface 13z. And an upper pillar portion having an upper and lower extension portion 33 and a reinforcing member 34 that connects the side panel 12 and the damper support portion 13x, and the upper end portion of the lower pillar portion 21 is located above the wheel house 13. 22, the lower end is connected to the side frame 11 and the floor cross member 18, the upper end of the vertical extension 33 is connected to the reinforcing member 34, the lower end is connected to the side frame 11, and the upper pillar The upper end portion of the portion 22 is connected to the roof reinforcement 32 via the roof side rail 31. [Selection] Figure 3

Description

  The present invention relates to a rear body structure of an automobile, and more particularly to a rear body structure of an automobile around a rear wheel house.

  As a technology related to the rear body structure around the rear wheel house of an automobile, Patent Document 1 discloses that the shock absorber mounting portion (damper support portion) has not only a thrust force directed from the road surface in the vertical direction of the vehicle body but also an inward direction of the vehicle width. In order to provide the rear structure of the vehicle body that can support both the thrust force and inward force input to the shock absorber mounting part, assuming that the facing inward force is input, it is connected to the shock absorber. A front pillar member and a rear pillar member that extend to the floor along the wheel house are disposed before and after the shock absorber bracket, and a horizontal member that extends in the longitudinal direction of the vehicle body is joined to the upper surface of the shock absorber bracket. The pillar member and the rear pillar member are connected to each other, and the front pillar member and the rear pillar member are connected. It discloses the coupling to the roof as well as connecting the upper end of the member to each other. Then, according to this, a triangular skeleton structure in which three members of the front pillar member, the rear pillar member, and the horizontal member are connected to each other is connected to the shock absorber bracket, and the thrust force from the shock absorber bracket is increased. It is said that a structure that is strong against thrusting force can be obtained by receiving the skeleton structure.

  In Patent Document 2, the damper device is disposed so as to be inclined inward in the vehicle width direction toward the upper side, and the upper end portion thereof is supported by a suspension housing (damper support portion) formed at the upper portion of the wheel house. The component force of the damper load acting in the vertical direction with respect to the housing inward in the vehicle width direction acts on the vehicle body, and this component force causes the problem of inclining that the side panel inner near the suspension housing falls inward in the vehicle width direction. In order to provide a rear vehicle body structure that can prevent the side panel inner from falling down in a vehicle body structure in which the suspension housing and the rear pillar part are separated in the front-rear direction, there is an upper side from the front upper part of the rear wheel house. A seat bracket that holds the seat back of the rear seat is provided in the pillar part that extends to The seat bracket is disclosed to be coupled to the inner reinforcing member connecting the side panels inner and suspension housing. And according to this, since the damper load acting on the inner reinforcing member is transmitted to the pillar portion via the seat bracket, it is possible to suppress the internal fall of the side panel inner due to the damper load, and therefore, the suspension housing and the pillar The parts can be arranged apart from each other in the vehicle front-rear direction. In addition, Patent Document 2 discloses a vertically extending portion provided to extend in the vertical direction at a portion rearward of the suspension housing on the inner surface of the rear wheel house. The upper and lower extensions have an upper end connected to the inner reinforcing member and a lower end connected to the rear side frame.

JP-A-11-180347 (in particular, paragraphs 0003, 0005, 0006, 0010, FIG. 1 and FIG. 2) JP 2013-82372 A (particularly, specification paragraphs 0002, 0013, 0014, 0018, FIGS. 3, 4, and 7)

  In Patent Document 1, a horizontal member is required in addition to the front pillar member and the rear pillar member that sandwich the damper support portion in the front and back, and the number of members increases, which is disadvantageous in terms of weight and cost.

  In Patent Document 2, for example, the damper support portion is formed by extending the wheel base, vertically supporting the damper device disposed so as to incline toward the front of the vehicle, or restricting the layout of the damper support portion and the oil supply pipe. Is disposed far away from the pillar portion, it becomes difficult to connect the inner reinforcing member and the pillar portion with the seat bracket.

  The present invention addresses the above-described problems in the rear body structure of the automobile around the rear wheel house without increasing the number of members even when the damper support portion is arranged far behind the pillar portion. An object of the present invention is to provide a rear body structure of an automobile capable of suppressing the rear wheel house and the internal fall of the periphery thereof.

  In order to solve the above problems, the present invention provides a rear wheel house that bulges inward from a side panel that constitutes a side wall of a vehicle, and a damper is provided at a damper support portion provided at an upper portion of the rear wheel house. A rear body structure of a vehicle in which an upper end portion of the apparatus is supported, a rear side frame extending in a vehicle front-rear direction at a lower portion of the vehicle body, a floor cross member extending in a vehicle width direction, and a roof reinforcement extending in a vehicle width direction at an upper portion of the vehicle body A damper support part reinforcing member that connects the side panel and the damper support part, and a roof side rail that is positioned above the rear wheel house and whose upper end extends in the vehicle front-rear direction at the upper part of the vehicle body Or an upper pillar portion connected to the roof reinforcement without intervention, and the rear hoist. The upper side of the vehicle interior side of the vehicle is extended in the vertical direction at the front part of the damper support part, the upper end part is connected to the lower end part of the upper pillar part, and the lower end part is the rear side frame and the floor cloth. A lower pillar portion connected to the member, and a vertically extending portion provided at a position rearward of the damper support portion on the vehicle inner surface of the rear wheel house, and an upper end portion of the lower pillar portion is provided on the damper support portion reinforcing member It is connected, The lower end part has an up-and-down extension part connected with the said rear side frame, It is characterized by the above-mentioned.

  According to the present invention, the lower pillar portion and the upper pillar portion, i.e., the pillar portion, the floor cross member, and the roof reinforcement, in the front portion of the rear wheel house damper support portion, in the vehicle front view. An annular frame structure is formed. In particular, since the lower pillar portion extends in the vertical direction with respect to the vehicle body, the annular frame structure including the pillar portion is excellent in rigidity against parallelogram deformation of the vehicle body when viewed from the front of the vehicle (that is, has a good roll rigidity feeling). In addition, the vehicle body is excellent in rigidity against bending deformation in the left-right direction of the vehicle body when viewed from the front of the vehicle (that is, the flicker rigidity is good). As a result, the rigidity of the damper support portion disposed rearwardly from the pillar portion is improved, and the rear wheel house and its surroundings are prevented from falling down.

  On the other hand, if the pillar portion is forcibly connected to the damper support portion disposed rearwardly from the pillar portion via the damper support portion reinforcing member, the pillar portion bends in the vehicle front-rear direction, and the pillar portion The rigidity of the portion is lowered, and consequently the rigidity of the annular frame structure is lowered. For this reason, it is not possible to obtain the action of suppressing the internal falling of the rear wheel house and its surroundings.

  In addition, according to the present invention, the rigidity of the damper support portion is improved via the damper support portion reinforcing member by the vertically extending portion extending in the vertical direction with respect to the vehicle body at the rear portion of the rear wheel house damper support portion. As a result, the rear wheel house and its surroundings are prevented from falling down.

  Further, unlike the above-mentioned Patent Document 2, the pillar portion and the damper support portion reinforcing member are not connected by the seat bracket. Therefore, compared to the above-mentioned Patent Document 2, the weight of the seat bracket is unnecessary and the weight is reduced. Figured.

  As described above, according to the present invention, the effect of the annular frame structure including the pillar portion at the front portion of the rear wheel house damper support portion and the vertical extension portion at the rear portion of the rear wheel house damper support portion. Combined with the action, even if the damper support portion is arranged far away from the pillar portion, the rear wheel house and its surroundings can be prevented from falling down without increasing the number of members. An automotive rear body structure is provided.

  In the present invention, a bulging ridge line portion that bulges toward the vehicle inner side is provided at a bent portion along a ridge line portion extending in the vehicle front-rear direction of the rear wheel house in the rear portion of the lower pillar portion, and the lower side It is preferable that a lower pillar portion reinforcing member extending upward from the floor cross member is overlapped and spot-welded on the bent portion in the front portion of the pillar portion.

  According to this structure, in the rear part of the lower pillar part, the lower pillar part is lightweight and highly rigid by the bulging ridge line part, and in the front part of the lower pillar part, the lower pillar part is reinforced. While the effect of suppressing the internal falling by the member is strengthened, breakage of spot welding at a bent portion where stress is concentrated is suppressed.

  In the present invention, the first portion where the lower end portion of the vertical extension portion is connected to the rear side frame, the damper support portion, and the predetermined reference portion of the upper pillar portion are both in a vehicle side view and a vehicle plan view. The triangular frame structure connecting the second part where the lower end of the lower pillar part is connected to the rear side frame, the first part, and the reference part is arranged in a vehicle side view and a vehicle plan view. It is preferable that an outer reinforcing member that is formed on both sides and extends from the damper support portion to the reference portion in a vehicle side view is provided on the vehicle outer side of the side panel.

  According to this configuration, the damper load acting on the damper support portion is efficiently transmitted to the pillar portion by the triangular frame structure passing through the damper support portion. In addition, since the outer reinforcing member is provided along the load transmission path, a decrease in rigidity of the triangular frame structure is suppressed. Therefore, it is possible to further suppress the internal falling due to the damper load, to increase the weight and rigidity of the rear body structure around the rear wheel house, to arrange the damper support part and the pillar part apart in the vehicle front-rear direction, Along with this, maintaining the design of doors and windows is achieved at a high level.

  According to the present invention, even if the damper support portion is arranged to be largely separated from the pillar portion rearward, the rear wheel house and the surrounding vehicle can be prevented from falling down without increasing the number of members. A rear body structure is provided.

1 is a right side view of a rear body structure of an automobile according to an embodiment of the present invention. It is a perspective view from the vehicle left front of the said rear body structure. It is an expansion perspective view of the important section of the above-mentioned rear body structure. It is a top view of the principal part of the said rear body structure. It is the arrow VV sectional view taken on the line of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a right side view of a rear body structure of an automobile 1 according to the present embodiment, and FIG. 2 is a perspective view of the rear body structure from the front left side of the vehicle.

  1 and 2, reference numeral 1 denotes an automobile according to the present embodiment, reference numeral 11 denotes a rear side frame, reference numeral 12 denotes a side panel, reference numeral 13 denotes a rear wheel house, reference numeral 18 denotes a floor cross member, reference numeral 19 denotes a rear suspension, reference numeral Reference numeral 20 denotes a rear pillar part, reference numeral 21 denotes a lower pillar part, reference numeral 22 denotes an upper pillar part, reference numeral 31 denotes a roof side rail, reference numeral 32 denotes a roof reinforcement, reference numeral 33 denotes an upper and lower extension part, and reference numeral 34 denotes a damper support part reinforcing member. Reference numeral 54 denotes a damper device.

  The rear suspension 19 includes a damper device 54, a plurality of (three in the illustrated example) arm members 56 that are swingably supported by subframes (not shown) provided on the rear side frame 11, and these arm members 56. Attached to the rear wheel 53 for supporting the rear wheel 53, a coil spring 55 supported by the rear side frame 11 for damping the vibration of the rear wheel 53, and the wheel support 52 can be swung vertically. And a trailing arm 51 to be supported. Small vibrations of the rear wheel 53 are damped by the damper device 54, and large vibrations are damped by the coil spring 55.

  The damper device 54 has a bump strap rubber (not shown) at the top, and the upper end portion of the bump strap rubber is supported by a damper support portion 13 x provided at the upper portion of the rear wheel house 13. A lower end portion of the damper device 54 is connected to the wheel support portion 52. The damper device 54 is disposed so as to incline forward in the vehicle as viewed from the side of the vehicle, and is disposed so as to incline inward in the vehicle width direction as viewed from the front of the vehicle.

  The trailing arm 51 is supported at the front end portion 51 a by the kick-up portion 11 a of the rear side frame 11 so as to be swingable in the vertical direction, and the rear end portion 51 b is connected to the wheel support portion 52. From the standpoint of shock mitigation when getting over the road surface protrusion, the support portion of the front end portion 51a of the trailing arm 51 to the kick-up portion 11a, that is, the position of the arm support portion 50 is higher than the axle position of the rear end portion 51b. Placed in position.

  In the rear vehicle body structure of the automobile 1 according to the present embodiment, a rear wheel house 13 that bulges from the side panel 12 that forms the side wall of the vehicle to the inside of the vehicle is provided. A damper support portion 13x is provided on the upper portion of the rear wheel house 13, and the upper end portion of the damper device 54 (more specifically, the upper end portion of the bump strap rubber) is supported on the damper support portion 13x. Specifically, the upper end portion of the damper device 54 is supported on the upper surface of the rear wheel house 13. That is, the damper support portion 13x is provided on the upper surface of the rear wheel house 13 in more detail.

  A lower pillar portion 21 of the rear pillar portion 20 is provided to extend in the vertical direction at a position in front of the damper support portion 13x on the inner surface 13z of the rear wheel house 13. A vertically extending portion 33 is provided to extend in the up and down direction at a site behind the damper support portion 13 x of the inner surface 13 z of the rear wheel house 13. A damper support portion reinforcing member 34 for connecting the side panel 12 and the damper support portion 13x is provided on the upper portion of the rear wheel house 13. The damper support portion reinforcing member 34 forms a closed cross section between the side panel 12 and the upper surface of the rear wheel house 13 where the damper support portion 13x is provided. Therefore, although the damper support part 13x is covered with the damper support part reinforcing member 34 and cannot be seen, in FIGS. 2 to 4, the position of the damper support part 13x is indicated by “●”.

  An upper end portion of the lower pillar portion 21 is connected to a lower end portion of the upper pillar portion 22 of the rear pillar portion 20 positioned above the rear wheel house 13. A lower end portion of the lower pillar portion 21 is connected to a pair of left and right rear side frames 11 (only the right side is shown) extending in the vehicle front-rear direction and a floor cross member 18 extending in the vehicle width direction at the lower part of the vehicle body. The upper end portion of the vertical extension portion 33 is connected to the damper support portion reinforcing member 34. The lower end of the vertical extension 33 is connected to the rear side frame 11. An upper end portion of the upper pillar portion 22 is connected to a roof reinforcement 32 extending in the vehicle width direction via a pair of left and right roof side rails 31 extending in the vehicle front-rear direction at the upper portion of the vehicle body.

  The floor cross member 18 is installed between the pair of left and right rear side frames 11, and the left and right end portions are coupled to a side surface of the rear side frame 11 and coupled to the lower end portion of the lower pillar portion 21. The roof reinforcement 32 is installed between the pair of left and right roof side rails 31, and the left and right end portions abut against the side surface of the roof side rail 31 and are coupled.

  1 and 2, reference numeral 30 denotes a quarter window opening, and reference numeral 60 denotes a side sill.

  3 is an enlarged perspective view of the main part of the rear vehicle body structure, FIG. 4 is a plan view of the main part of the rear vehicle body structure, and FIG. 5 is a cross-sectional view taken along line VV in FIG. 3 and 4, reference numeral 25 denotes an outer reinforcing member, reference numeral 35 denotes a first gusset, and reference numeral 36 denotes a second gusset.

  The rear wheel house 13 is formed with a ridge line portion 13a extending in the vehicle front-rear direction. The lower pillar portion 21 is bent along the ridge line portion 13a. A bulging ridge line portion 21x that bulges toward the inside of the vehicle is provided at the bent portion 21a of the rear portion of the lower pillar portion 21. A first gusset (corresponding to the “lower pillar portion reinforcing member” of the present invention) 35 extending upward from the floor cross member 18 is overlapped on the bent portion 21b of the front side portion of the lower pillar portion 21 to be spot welded. Spot welding is performed at 21y.

  A second gusset 36 is further superimposed on the first gusset 35 and spot welded. The first gusset 35 and the second gusset 36 have a shape in which the front portion extends upward and the rear portion drops downward (in other words, the front portion has a shape pointed upward). Spot welded on both sides. In particular, the first gusset 35 is provided across the left and right ends of the floor cross member 18 and the lower half of the lower pillar portion 21, and the first gusset 35, the lower pillar portion 21, and the inner side of the rear wheel house 13. Three of the surfaces 13z are joined.

  Assuming that a portion where the lower end of the upper and lower extension 33 is connected to the rear side frame 11 is a first portion P1, and a portion provided in advance in the upper pillar portion 22 is a reference portion Pa, the first portion P1, the damper support portion 13x, The reference part Pa is aligned on both the vehicle side view (see FIG. 3) and the vehicle plan view (see FIG. 4). In addition, when a portion where the lower end portion of the lower pillar portion 21 is connected to the rear side frame 11 is a second portion P2, a triangular frame structure connecting the second portion P2, the first portion P1, and the reference portion Pa, It is formed in both a vehicle side view (see FIG. 3) and a vehicle plan view (see FIG. 4). And the outer side reinforcement member 25 extended from the said damper support part 13x to the said reference | standard site | part Pa by the vehicle side view is provided in the vehicle outer side of the side panel 12. FIG. The outer reinforcing member 25 has a shape that inclines toward the front of the vehicle toward the upper side. In response to this, the upper pillar portion 22 also has a shape that inclines forward of the vehicle toward the upper side.

  3 and 4, the floor cross member 18 has a shape in which the floor panel 14 is sandwiched between the floor cross member upper 18a and the floor cross member lower 18b. Further, the reference portion Pa is set near the lower pillar portion 21 at a position corresponding to the lower portion of the quarter window opening 30.

  As shown in FIG. 5, the upper pillar portion 22 includes the reference portion Pa and has a three-piece structure including a pillar inner 22a, a pillar outer 22b, and a pillar reinforcement 22c. Among these, the pillar inner 22a and the pillar reinforcement 22c having a relatively large thickness and high rigidity are relatively close to each other, and the pillar outer 22b having a relatively small thickness and low rigidity forms a closed cross section with them. Are relatively spaced apart.

  In the above description, the right side of the drawing is mainly described. However, it is needless to say that the rear wheel house 13, the damper support portion 13x, the rear suspension 19, the rear pillar portion 20, and the like are provided in a pair on the left and right.

  Next, the operation of this embodiment will be described.

  (1) In the rear body structure of the automobile 1 according to the present embodiment, a rear wheel house 13 that bulges inward from a side panel 12 that constitutes a side wall of the vehicle is provided, and is provided above the rear wheel house 13. The upper end portion of the damper device 54 is supported by the damper support portion 13x. A rear side frame 11 extending in the vehicle longitudinal direction at the lower part of the vehicle body and a floor cross member 18 extending in the vehicle width direction, a roof reinforcement 32 extending in the vehicle width direction at the upper part of the vehicle body, the side panel 12 and the damper support portion 13x. The damper support portion reinforcing member 34 to be connected and the upper end portion of the damper support portion reinforcing member 34 are connected to the roof reinforcement 32 via a roof side rail 31 extending in the vehicle front-rear direction at the upper part of the vehicle body. The upper pillar portion 22 and the rear wheel house 13 on the inner surface 13z of the rear wheel house 13 are provided so as to extend in a vertical direction at a portion in front of the damper support portion 13x, and an upper end portion thereof is a lower end portion of the upper pillar portion 22. Are connected to the rear side frame 11 and the floor A lower pillar portion 21 connected to the member 18 and a portion extending rearward from the damper support portion 13x of the inner surface 13z of the rear wheel house 13 are provided to extend in the vertical direction. A vertical extension 33 is connected to the support reinforcing member 34 and has a lower end connected to the rear side frame 11.

  According to this configuration, the lower pillar portion 21 and the upper pillar portion 22, that is, the rear pillar portion 20, the floor cross member 18, and the roof reinforcement 32, at a portion in front of the damper support portion 13 x of the rear wheel house 13. Thus, an annular frame structure is formed when the vehicle is viewed from the front. In particular, since the lower pillar portion 21 extends in the vertical direction with respect to the vehicle body, the annular frame structure including the rear pillar portion 20 is excellent in rigidity against parallelogram deformation of the vehicle body when viewed from the front of the vehicle (that is, has a good roll rigidity feeling). ) And the rigidity against bending deformation in the left-right direction of the vehicle body when viewed from the front of the vehicle (i.e., the feeling of flutter rigidity is good). As a result, the rigidity of the damper support portion 13x arranged rearwardly from the rear pillar portion 20 is improved, and the rear wheel house 13 and its surroundings are prevented from falling down.

  On the other hand, if the rear pillar portion 20 is forcibly connected to the damper support portion 13x disposed rearwardly from the rear pillar portion 20 via the damper support portion reinforcing member 34, the rear pillar portion 20 is moved in the vehicle front-rear direction. Bent, the rigidity of the rear pillar portion 20 is lowered, and consequently the rigidity of the annular frame structure is lowered. Therefore, the effect | action which suppresses the inward fall of the rear wheel house 13 and its periphery is not acquired.

  At the same time, in the present embodiment, at the rear portion of the damper support portion 13x of the rear wheel house 13, the damper support portion reinforcing member 34 supports the damper by the vertical extension portion 33 extending in the vertical direction with respect to the vehicle body. The rigidity of the portion 13x is improved, and the inner wheel of the rear wheel house 13 and its surroundings is suppressed.

  Further, unlike the above-mentioned Patent Document 2, the rear pillar portion 20 and the damper support portion reinforcing member 34 are not connected by a seat bracket (not shown). The weight can be reduced by unnecessary parts.

  As described above, according to the present embodiment, the operation by the annular frame structure including the rear pillar 20 at the front portion of the damper support portion 13x of the rear wheel house 13 and the rear of the damper support portion 13x of the rear wheel house 13 are provided. Combined with the action of the upper and lower extension portions 33 in the part, even if the damper support portion 13x is arranged far away from the rear pillar portion 20 without increasing the number of members, the rear wheel house 13 and A rear body structure of the automobile 1 that can suppress the internal falling of the periphery is provided.

  (2) In the present embodiment, a bulging ridge line that bulges toward the vehicle inner side at a bent portion 21a along the ridge line portion 13a extending in the vehicle front-rear direction of the rear wheel house 13 in the rear portion of the lower pillar portion 21. The first gusset 35 is provided with a portion 21x and extends upward from the floor cross member 18 at a bent portion 21b along the ridge line portion 13a extending in the vehicle front-rear direction of the rear wheel house 13 in the front portion of the lower pillar portion 21. Are spot-welded at the spot weld 21y.

  According to this configuration, in the rear portion of the lower pillar portion 21, the lower pillar portion 21 is lightweight and highly rigid by the bulging ridge line portion 21 x, and in the front portion of the lower pillar portion 21, While strengthening the inclining suppressing action by the one gusset 35, breakage of spot welding at the bent portion 21b where stress concentrates is suppressed.

  (3) In the present embodiment, the first portion P1 where the lower end portion of the vertical extension portion 33 is connected to the rear side frame 11, the damper support portion 13x, and the predetermined reference portion Pa of the upper pillar portion 22 Are arranged in a straight line in both the vehicle side view and the vehicle plan view, and the lower part of the lower pillar portion 21 is connected to the rear side frame 11, the second part P2, the first part P1, and the reference part Pa. Is formed in both the vehicle side view and the vehicle plan view, and an outer reinforcing member 25 extending from the damper support portion 13x to the reference portion Pa in the vehicle side view is formed on the vehicle exterior side of the side panel 12. Provided.

  According to this configuration, the damper load acting on the damper support portion 13x is efficiently transmitted to the rear pillar portion 20 by the triangular frame structure passing through the damper support portion 13x. And since the outer reinforcement member 25 is provided along the load transmission path | route, the rigidity fall of the said triangular frame structure is suppressed. Therefore, the inward tilt due to the damper load can be further suppressed, the rear body structure around the rear wheel house 13 is made lighter and more rigid, and the damper support portion 13x and the rear pillar portion 20 are spaced apart in the vehicle front-rear direction. In addition, the design of the doors and windows can be maintained at a high level.

  Further, the upper pillar portion 22 provided with the reference portion Pa is structured as shown in FIG. 5, whereby the rigidity of the upper pillar portion 22 is improved and the damper load is transmitted to the rear pillar portion 20 more efficiently.

  (4) In the present embodiment, in addition to the first gusset 35 that is overlapped with the lower pillar portion 21 and spot welded, a second gusset 36 that is further overlapped and spot welded is provided. The front part of 36 extends upward, and the rear part is downward.

  According to this configuration, since the front side portions of the gussets 35 and 36 are relatively long in the vertical direction, a sufficient spot welding range is ensured and the rear side portion is relatively short in the vertical direction. A sufficient range of the bulging ridge line portion 21x is ensured, and stress distribution is achieved.

  Although the present invention has been described in detail with reference to the embodiment, the present invention is not limited to the above embodiment. For example, the bulging ridge line portion 21x of the lower pillar portion 21, the first gusset 35, the second gusset 36, the triangular frame structure, the outer reinforcing member 25, and the like can be omitted.

  In the above embodiment, the upper end portion of the upper pillar portion 22 is connected to the roof reinforcement 32 via the roof side rail 31, but is directly connected to the roof reinforcement 32 not via the roof side rail 31. May be.

DESCRIPTION OF SYMBOLS 1 Car 11 Rear side frame 12 Side panel 13 Rear wheel house 13a Ridge part 13x Damper support part 13z Car inner surface 18 Floor cross member 21 Lower pillar part 21a Rear part bent part 21b Front part bent part 21x Swelling ridge line Part 21y Spot welded part 22 Upper pillar part 25 Outer reinforcement member 31 Roof side rail 32 Roof reinforcement 33 Vertical extension part 34 Damper support part reinforcement member 35 First gusset (lower pillar part reinforcement member)
54 Damper Device Pa Reference Part P1 First Part P2 Second Part

Claims (3)

A rear vehicle body structure in which a rear wheel house bulging inward from a side panel constituting a side wall of a vehicle is provided, and an upper end portion of a damper device is supported by a damper support portion provided at an upper portion of the rear wheel house. There,
A rear side frame extending in the vehicle longitudinal direction at the lower part of the vehicle body and a floor cross member extending in the vehicle width direction;
A roof reinforcement extending in the vehicle width direction at the top of the vehicle body;
A damper support part reinforcing member for connecting the side panel and the damper support part;
An upper pillar portion which is located above the rear wheel house and whose upper end is connected to the roof reinforcement via or without a roof side rail extending in the vehicle front-rear direction at the upper part of the vehicle body;
The rear wheel house is provided on the inner surface of the rear wheel house so as to extend in the vertical direction at a portion in front of the damper support portion, the upper end portion is connected to the lower end portion of the upper pillar portion, and the lower end portion is the rear side frame. And a lower pillar portion connected to the floor cross member,
The rear wheel house is provided on the inner side surface of the rear wheel house so as to extend in the vertical direction at a portion rearward of the damper support portion, the upper end portion is connected to the damper support portion reinforcing member, and the lower end portion is connected to the rear side frame A rear body structure of an automobile having a vertically extending portion connected thereto. In the rear body structure of the automobile according to claim 1,
A bulging ridge line portion that bulges toward the vehicle interior is provided at a bent portion along the ridge line portion extending in the vehicle front-rear direction of the rear wheel house in the rear portion of the lower pillar portion,
A rear body structure of an automobile, wherein a lower pillar reinforcing member extending upward from the floor cross member is overlapped and spot-welded to the bent portion in the front portion of the lower pillar portion. The rear body structure of the automobile according to claim 1 or 2,
The first part where the lower end of the upper and lower extension part is connected to the rear side frame, the damper support part, and the predetermined reference part of the upper pillar part are arranged in a straight line both in a vehicle side view and a vehicle plan view. ,
A triangular frame structure connecting the lower part of the lower pillar part to the rear side frame, the second part connected to the rear side frame, the first part, and the reference part is formed both in a vehicle side view and a vehicle plan view;
A rear body structure of an automobile, wherein an outer reinforcing member extending from the damper support portion to the reference portion in a vehicle side view is provided on the vehicle outer side of the side panel.

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