JP2016117461A - Rear part vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear part vehicle body structure of a vehicle which avoids stress concentration on peripheral members to eliminate the need of reinforcement of the peripheral members while employing a slim rear upper member having high rigidity.SOLUTION: A rear part vehicle body structure of a vehicle includes a rear upper member 30 connecting left and right side walls of a vehicle body in a vehicle width direction. The rear upper member 30 has a connection part 30D connected with a damper support part. A portion of the rear upper member 30, which is located closer to the center side than the connection part 30D in a vehicle width direction, is formed as a closed cross section. A portion of the rear upper member 30, which is located closer to the outer side than the connection part 30D in the vehicle width direction, is formed as a closed cross section.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a rear vehicle body structure including a rear upper member that connects left and right side walls of a vehicle body in a vehicle width direction.

  Generally, in the rear body structure of an automobile, a rear upper member that connects the left and right side walls of the vehicle body in the vehicle width direction is provided, and an auxiliary equipment storage space is provided in front of the rear upper member. There is a trunk room space at the back, and there is a demand to make both the front and rear spaces as large as possible.

  Therefore, it is conceivable to make the above-mentioned rear upper member slim (slim), but if the rear upper member is simply made thin, its rigidity is lowered. For this reason, in order to make the rear upper member slender and increase its rigidity, it is conceivable to increase the thickness of the panel itself constituting the rear upper member. Therefore, it is necessary to reinforce the peripheral members, and the reinforced area increases, which increases the weight and cost of the vehicle body. On the other hand, when such reinforcement is not performed, there is a problem that a crack is generated or a joint part by spot welding or the like is peeled off.

  By the way, in Patent Document 1, a rear deck member is provided as a rear upper member for connecting the left and right side walls of the vehicle body in the vehicle width direction, and the rear deck member is formed in a closed cross-sectional structure including a front panel, an upper panel, and a rear panel. A structure in which the rear deck member having the closed cross-sectional structure is reinforced with gussets is disclosed.

  However, Patent Literature 1 does not disclose a technical idea of how to avoid stress concentration on the peripheral members.

  Further, Patent Document 2 discloses a pair of left and right wheel houses including a rear deck member installed between a pair of left and right quarter panels in a rear vehicle body and suspension mounting portions disposed below both ends of the rear deck member. A pair of left and right gusset members that connect the vicinity of the suspension mounting portion of each wheelhouse inner panel and the rear deck member, and each gusset member extends from the wheelhouse inner panel side to the rear deck member side. A structure tilting inward in the vehicle width direction is disclosed.

  However, this Patent Document 2 does not disclose the technical idea of how to avoid stress concentration on the peripheral members.

Japanese Patent No. 4654758 JP 2005-186828 A

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rear body structure of an automobile in which a rear upper member is slim and highly rigid, avoids stress concentration on peripheral members, and omits reinforcement.

  A rear body structure of a vehicle according to the present invention is a rear body structure of a vehicle including a rear upper member that connects left and right side walls of the vehicle body in the vehicle width direction, and the rear upper member is connected to a damper support portion. The rear upper member is formed with a closed cross section in the center in the vehicle width direction from the connecting portion, and the outer side in the vehicle width direction is formed in an open cross section with respect to the connecting portion of the rear upper member. It is.

According to the above configuration, the left and right damper support portions of the rear upper member are connected by the high-rigidity member having the closed cross section, and the outer side in the vehicle width direction is wider than the connection portion by the open cross-section, and the local rigidity is reduced. Stress concentration at the connecting portion can be avoided, and the left and right damper support portions can be connected with high rigidity, and the reinforcement of the peripheral members can be omitted, thereby reducing the weight.
In short, while the rear upper member is slim and highly rigid, stress concentration on the peripheral members can be avoided and reinforcement thereof can be omitted.

  In one embodiment of the present invention, the closed cross section of the rear upper member at the center in the vehicle width direction has a rear surface portion and another surface portion, and the rear surface portion is a panel connected to the opening edge of the trunk room. The panel is formed thinner than the panel constituting the other surface portion.

According to the above configuration, it is possible to achieve both the high rigidity of the rear upper member and the function of the rear upper member as a trunk room opening edge panel.
In addition, there is no stress concentration in the trunk room, and the load can be transmitted while relaxing the load, thereby contributing to the high rigidity of the entire vehicle body.

  In one embodiment of the present invention, the rear upper member has the largest closed cross-sectional area with respect to the other part in the closed cross-section of the connecting portion with the damper support portion, The cross-sectional shapes are different.

According to the above configuration, the connecting portion of the rear upper member functions as a joint portion, and its closed cross-sectional area is the largest, so that it is balanced against stress from each direction, and the connecting portion removes from the damper. The load can be smoothly transmitted to both sides in the vehicle width direction.
That is, it is possible to achieve both load reception and stress dispersion.

  In one embodiment of the present invention, the damper support portion is provided at the front lower side of the rear upper member, and the vehicle width direction central portion of the rear upper member has a front lower extension portion extending from the cross-section center portion to the front lower portion. And a three-section closed cross section having an upper extension extending upward and a rear extension extending rearward.

  According to the above configuration, the center of the cross section of the rear upper member is arranged behind the left and right damper support portions to form a slim three-way closed cross section, thereby compensating between the left and right damper support portions. While expanding the arrangement space of other members such as a machine, the left and right damper support parts are firmly received in the direction in which the front lower extension extends, and the front lower extension part is displaced. Therefore, it can be reinforced with other extensions (upper and rear extensions) extending in a bifurcated direction.

  According to the present invention, there is an effect that the rear upper member is slim and highly rigid, stress concentration on the peripheral members is avoided, and reinforcement thereof can be omitted.

The side view which shows the motor vehicle provided with the rear body structure of this invention in the closed state of an opening-and-closing roof Plan view of FIG. Side view when the open / close roof is moved from the closed state to the open state Side view showing the open state of the open / close roof Plan view of the rear of the vehicle with the open / close roof and deck cover removed 5 is a perspective view of the main part of FIG. Perspective view showing the first bracket as a single item The perspective view which shows the related structure of each 1st and 2nd bracket and link mechanism AA sectional view taken along line AA in FIG. BB cross-sectional view of FIG. CC sectional view taken on line CC in FIG. Perspective view of the left side of the vehicle showing the configuration of the fuel filler cup portion side of the rear upper member DD sectional view taken along line D-D in FIG. (A) is an arrow sectional view of the principal part along the EE line of FIG. 5, (b) is an arrow sectional view of the principal part along the GG line of FIG. (A) is an arrow sectional view of the principal part which follows the HH line of FIG. 5, (b) is an arrow sectional view of the principal part which follows the JJ line of FIG.

  The rear part of a vehicle with a rear upper member that connects the left and right side walls of the vehicle body in the vehicle width direction for the purpose of avoiding reinforcement while avoiding stress concentration on peripheral members while making the rear upper member slim and highly rigid In the vehicle body structure, the rear upper member has a connecting portion connected to a damper support portion, and the rear upper member is formed in a closed cross section in the vehicle width direction center side than the connecting portion of the rear upper member. This is realized by a configuration in which the outer side in the vehicle width direction is formed in an open cross section with respect to the connecting portion.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawings show the rear body structure of an automobile, FIG. 1 is a side view showing the automobile with the rear body structure in a closed state of the opening / closing roof, FIG. 2 is a plan view thereof, and FIG. 3 is the opening of the opening / closing roof from the closed state. FIG. 4 is a side view showing an open state of the opening / closing roof.
In this embodiment, an open car having a two-seater structure is shown.

  As shown in FIGS. 1 to 4, the rear structure of the vehicle body has an open / close roof 1, a roof storage chamber 2, a rear deck cover 3, a trunk room 4, a trunk lid 5, and a parallel link that opens and closes the rear deck cover 3. A link mechanism 6 having a structure (see FIG. 3) and a roof opening / closing link mechanism (not shown) for opening / closing the opening / closing roof 1 and a back window 9 described later are provided.

  The open / close roof 1 includes a roof closed state (see FIGS. 1 and 2) covering the passenger compartment 7 (that is, the vehicle compartment), and a roof open state (see FIG. 4) stored in the roof storage chamber 2 to open the passenger compartment 7. It is supported by the vehicle body so that it can be displaced between the two.

  The open / close roof 1 is a hard-top movable roof. The open / close roof 1 includes a front roof 1A and a middle roof 1B.

  As shown in FIG. 1, the front roof 1A is a roof that covers the upper part of the passenger compartment 7, and the middle roof 1B is a roof that is connected to the rear side of the front roof 1A in the roof closed state.

  1 and 2, a plate-like rear header 8 which is a component of the rear deck cover 3 is connected to the rear side of the middle roof 1B in the roof closed state shown in FIGS. 9 (see FIG. 2) is continuously provided.

  As shown in FIGS. 1 and 2, the front roof 1A, the middle roof 1B, the rear header 8, and the back window 9 are in close contact with each other via a seal member (not shown) when the roof is closed. On the other hand, the front roof 1A, the middle roof 1B, the rear header 8, and the back window 9 are separated from each other as shown in FIG. 4 when the roof is opened.

  The front roof 1A, the middle roof 1B, and the back window 9 are connected to each other via a roof opening / closing link mechanism (not shown) on both the left and right sides in the vehicle width direction, and the vehicle body via the roof opening / closing link mechanism. It is connected to. However, the above-described rear header 8 is not connected to the roof opening / closing link mechanism.

  The roof storage chamber 2 (see FIG. 1) is provided between the passenger compartment 7 and the trunk room 4 provided behind the passenger compartment 7. The roof storage chamber 2 is a compartment for storing the open / close roof 1 (the front roof 1A and the middle roof 1B) and the back window 9. The front roof 1A, the middle roof 1B, and the back window 9 are stored in a state where they are overlapped in the vertical direction, as indicated by dotted lines in FIGS.

  The rear deck cover 3 covers the opening 2a (see FIG. 1) of the roof storage chamber 2 so that it can be opened and closed. The rear deck cover 3 includes a base portion 3A, left and right raised portions 3B and 3B, a rear header 8, and a high mount stop lamp 10 (see FIG. 2).

  The base portion 3A is a plate-like portion having a trapezoidal shape in plan view, and the front portion is shorter in the vehicle width direction than the rear portion (see FIG. 2). A high-mount stop lamp 10 is provided on the upper surface of the center portion of the base portion 3A in the vehicle width direction.

  The raised portion 3B is integrally provided at the left end (one end in the vehicle width direction) and the right end (the other end in the vehicle width direction) of the base portion 3A. The raised portion 3B protrudes upward with respect to the base portion 3A and extends in the front-rear direction.

  The raised portion 3B is formed in a substantially triangular shape in a vehicle side view. That is, the upper edge portion 3a of the raised portion 3B is inclined obliquely downward from the front portion to the rear portion, and the lower end portion 3b of the raised portion 3B extends in a substantially horizontal direction, whereby the raised portion 3B is formed in a triangular shape in a side view. ing. Each of the upper edge portion 3a and the lower end portion 3b has a slightly rounded upward convex shape. A cutout portion 3c cut out toward the rear side is formed in the front portion of the triangle, and a quarter window 11 is provided in the cutout portion 3c.

  As shown in FIG. 1, the notch 3 c extends rearward from the upper end of the back window 9 that inclines forward in a vehicle side view in the roof closed state and the roof open state. In the roof closed state, the slope of the upper edge 3a of the raised portion 3B is gentler than the slope of the back window 9. As a result, an inner side wall 3D in the vehicle width direction as a triangular wall portion is formed behind the side portion of the back window 9 as viewed from the side, which forms the inner side surface of the raised portion 3B (FIG. 2). reference). As shown in FIG. 2, the vehicle width direction inner side wall 3D is interposed between the high-mount stop lamp 10 and the notch 3c.

  The rear end portion of the raised portion 3B protrudes rearward from the rear end portion of the base portion 3A (see FIG. 2). The rearward projecting portion is formed in a rearwardly constricted shape so that both the vehicle width direction and vertical dimension (width and height) become smaller toward the rear side.

  The upper end 3a of the raised portion 3B on the left side in the vehicle width direction and the upper end portion 3a of the raised portion 3B on the right end side in the vehicle width direction are connected in the vehicle width direction via the rear header 8. The left raised portion 3B, the rear header 8, and the right raised portion 3B are formed integrally or integrally.

The left raised portion 3B has a function as a left rear pillar, and the right raised portion 3B has a function as a right rear pillar.
The rear header 8 only needs to be connected to any position above the lower end of the raised portion 3B, and does not necessarily have to be connected to the upper end.

  A rectangular area surrounded by the left raised portion 3B, the right raised portion 3B, the rear header 8, and the base portion 3A forms an opening 3d facing the back window 9 (see FIGS. 2 and 4).

  The left raised portion 3B and the right raised portion 3B have shapes that gradually expand inward in the vehicle width direction in plan view as they approach the opening 3d and the cutout portion 3c (see FIG. 2).

  The above-described link mechanisms 6 (see FIGS. 3 and 8) for opening and closing the rear deck cover 3 are respectively provided at both ends (left end and right end) in the vehicle width direction in the roof storage chamber 2. The link mechanism 6 connects the bottom of the rear deck cover 3 and the side of the roof storage chamber 2. Moreover, this link mechanism 6 is supporting the location near the front part of the protruding part 3B.

  When the open / close roof 1 shown in FIG. 1 is folded and stored in the roof storage chamber 2 as shown in FIG. 4, the rear deck cover 3 is first lifted up by the link mechanism 6 (see FIG. 3). When the rear deck cover 3 is lifted up, the front roof 1A, the middle roof 1B and the back window 9 are folded up and down by the roof opening / closing link mechanism (not shown) and stored in the roof storage chamber 2 (see FIG. 3) Next, when the rear deck cover 3 is lifted down by the link mechanism 6, the open / close roof 1 is stored in the roof storage chamber 2 as shown in FIG. Can be covered.

  As shown in a plan view in FIG. 2, the lower end of the raised portion 3B of the above-described rear deck cover 3 is formed in a vehicle design in which the rear portion is sharpened toward the rear. In other words, the width in the vehicle width direction on the vehicle front side at the lower ends of the left and right raised portions 3B, 3B is wide, the width in the vehicle width direction on the vehicle rear side at the lower ends of the left and right raised portions 3B, 3B is narrow, The lower ends of the raised portions 3B and 3B are formed so as to extend in the front-rear direction in a substantially linear shape in plan view.

  5 is a plan view of the rear portion of the vehicle shown with the open / close roof 1, the rear deck cover 3 and the link mechanism 6 removed, FIG. 6 is a perspective view of the main part of FIG. 5, and FIG. 7 is a perspective view of the first bracket as a single item. 8 is a perspective view showing a related structure between the first and second brackets and the link mechanism 6, FIG. 9 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 10 is a cross-sectional view taken along line BB in FIG. FIG. 11 is a cross-sectional view taken along the line CC of FIG. 5, and FIG. 12 is a perspective view of the left side of the vehicle showing the configuration of the rear upper member on the fuel filler cup side.

  As shown in FIG. 9, a rear floor panel 12 that forms the floor surfaces of the roof storage chamber 2 and the trunk room 4 is provided, and a rear side frame 13 that extends in the vehicle front-rear direction is joined to the lower portion of the rear floor panel 12 in the vehicle width direction. The rear side frame 13 is fixed and a rear side closed section 14 extending in the front-rear direction of the vehicle is formed between the rear side frame 13 and the rear floor panel 12 to improve the rigidity of the lower vehicle body.

  As shown in FIG. 9, a wheel house 17 is configured by joining and fixing a wheel house inner 15 and a wheel house outer 16 on the outer side in the vehicle width direction of the rear floor panel 12 described above. As shown in the drawing, a rear fender 20 including a rear fender outer 18 (vehicle body outer plate) and a rear fender inner 19 is joined and fixed to the outer side of the wheel house outer 16.

  As shown in FIG. 9, the upper edge 20a of the rear fender 20 is located on the inner side in the vehicle width direction with respect to the joint portion 21 of the lower end of the rear fender inner 19, the upper end of the wheel house inner 15, and the upper end of the wheel house outer 16. Thus, the rear vehicle body rigidity is improved.

As shown in FIG. 5, between the front roof storage chamber 2 and the rear trunk room 4, a rear upper member 30 (which agrees with the rear deck member) is formed between the left and right vehicle body side walls. It is connected in the vehicle width direction.
The rear upper member 30 includes a lower panel 31, a front panel 32, and a rear panel 33 that are located on the center side in the vehicle width direction, and side panels 34 and 35 that are located on both left and right sides in the vehicle width direction.

  On the other hand, as shown in FIGS. 6 and 12, the left and right damper support portions 22 bulge in a stump shape (a so-called stamp shape) on the inner side in the vehicle width direction of the wheel house inner 15 and on the rear side. Are formed integrally with the wheel house inner 15.

  Then, between the left and right side panels 34 and 35 of the rear upper member 30 and the rear surfaces of the damper support portions 22 and 22 described above, a highly rigid upper mounting bracket 23, diagonal bracket 24, and lower mounting bracket 25 are all used. And it connects with the up-and-down direction through the rear part attachment bracket 29 (refer FIGS. 13-15).

  As shown in FIGS. 6, 8, and 9, the link mechanism 6 that opens and closes the rear deck cover 3 is attached to the wheel house inner 15 via a first bracket 41 and a second bracket 42. Since the configuration of each of the elements 6, 41, and 42 is substantially symmetrical, the configuration on the right side of the vehicle will be mainly described in the following description.

  As shown in FIG. 8, the link mechanism 6 corresponds to a lower link, a base portion 6B having a substantially horizontal mounting seat 6a at the lower portion, a front link 6F, a rear link 6R, and a rear portion that is substantially horizontal at the upper end. As shown in FIG. 9, the rear deck cover mounting portion 6 b is mounted on the rear deck cover mounting portion 6 b using a mounting member 26 such as a bolt or a nut. The rear deck cover 3 is attached.

  Here, the upper portion of the base portion 6B, the front side link 6F, the rear side link 6R, and the upper side link 6U are pin-connected to form a parallel link mechanism, and the link mechanism 6 drives the link mechanism 6. An actuator is provided.

  As shown in FIGS. 6 and 7, the first bracket 41 is provided with front and rear outer mounting portions 41 a and 41 b that are attached to the top of the wheel house inner 15. Front and rear closed cross-sections 43 and 44 are respectively formed between the wheel house inner 15 and a front and rear closed cross-section 43 and 44 are connected to each other in the vehicle front-rear direction.

  As shown in FIG. 7, front and rear inner mounting portions 41c and 41d (inner joints in the wheel house vehicle width direction) are integrally formed on the inner side in the vehicle width direction of the first bracket 41, and the vehicle width direction. A plurality of flange portions 41e, 41f, and 41g joined to the upper end flange portion of the wheel house inner 15 are integrally formed at the outer end portion so as to be separated from each other in the front-rear direction.

7, the first bracket 41 is joined and fixed to the corresponding portion of the wheel house inner 15 by a plurality of spot welding points SW1 to SW11.
In particular, spot welding points SW8 and SW9 in the flange portion 41f of the first bracket 41 are joined by three-piece welding of the wheel house outer 16, the wheel house inner 15, and the flange portion 41f as shown in FIG. .

  As shown in FIG. 7, a recess 41 h extending in the front-rear direction is formed between the above-described closed connection cross-section portion 45 and the flange portion 41 f that is a joint portion on the outer side in the vehicle width direction of the first bracket 41. Then, a plurality of ridge lines X1, X2, X3 extending in the vehicle front-rear direction are formed by the formation of the recess 41h (three ridge lines are shown in FIG. 7, but specifically four ridge lines are formed) This improves the rigidity of the first bracket 41 itself.

As shown in FIG. 10, the concave portion 41 h of the first bracket 41 is connected to the upper surface of the wheel house inner 15 by a plurality of spot welding locations SW <b> 12 (however, only one location is shown in FIG. 10).
By connecting the aforementioned front and rear closed cross-sections 43, 44 in the vehicle front-rear direction by the connecting closed cross-section portion 45, the load input from the rear deck cover 3 is dispersed in the front-rear direction to increase the strength of the first bracket 41. It is configured.

  Further, as shown in FIG. 7, the ridge lines X1, X2, and X3 are increased by forming the concave portion 41h to increase the rigidity of the first bracket 41 itself, and as shown in FIG. By connecting the recess 41 h to the upper surface of the wheel house inner 15, the input load is configured to be distributed to the wheel house 17.

  Further, as shown in FIG. 7, a relatively wide connecting closed cross section 45 is formed between the front and rear outer mounting portions 41a and 41b of the first bracket 41 so that the first bracket 41 The vehicle width direction rigidity of 41 is also ensured.

  As shown in FIGS. 6, 8, 9, and 11, the second bracket 42 connected to the first bracket 41 is formed to be thicker and more rigid than the first bracket 41, and this second bracket 42, a substantially horizontal mounting seat 42a that is offset inward in the vehicle width direction with respect to the top of the wheel house inner 15 and supports the link mechanism 6, and legs extending downward from both front and rear portions of the mounting seat 42a. The lower mounting portions 42d and 42e of the slant structure formed through the portions 42b and 42c and inclined so that the outer side in the vehicle width direction is higher and the inner side in the vehicle width direction is lower, and the mounting seat 42a described above in the vehicle width direction. Front and rear outer mounting portions 42f and 42g located on the outer side are provided.

  9 and 11, the lower mounting portions 42d and 42e are inclined with respect to the inner mounting portions 41c and 41d of the first bracket 41 using mounting members such as a weld bolt 46 and a nut 47, as shown in FIGS. It is fastened to the fastening.

  As shown in FIGS. 9 and 11, the lower mounting portions 42d and 42e of the second bracket 42 described above are mounted obliquely at an acute angle with respect to the vertical line (virtual vertical line extending in the vertical direction). .

  Further, as shown in FIGS. 6, 9, and 11, the outer mounting portions 42f and 42g of the second bracket 42 are connected to the outer mounting portions 41a and 41b (see FIG. 7) of the first bracket 41 by bolts, nuts, and the like. Are attached and fixed obliquely.

  As shown in FIG. 9, the outer mounting portions 42f and 42g of the second bracket 42 are mounted obliquely at an acute angle with respect to a horizontal line (a virtual horizontal line extending in the lateral direction, that is, the vehicle width direction).

  As shown by an arrow α in FIG. 8, the link mechanism receives vibrations of acceleration / deceleration and road surface unevenness when the roof 1 is retracted and unfolded when the vehicle is traveling, and when the rear deck cover 3 is lifted and lifted down. As shown by the arrow β in FIG. 8, the mounting seat 6a of the link mechanism 6 protrudes to the inside of the wheel house inner 15 so as to extend in the vehicle width direction. Although the vertical vibration load is applied, the vertical load input from the rear deck cover 3 is received obliquely by the lower mounting portions 42d and 42e of the second bracket 42 and sheared against the vertical load. The load ratio in the direction is increased, the load in the direction in which the joint portion (see spot welded portion) between the wheel house inner 15 and the first bracket 41 is peeled off is reduced, and the first bracket 41 is reduced. Is prevented from being peeled off from the wheel house inner 15 and the rigidity of the rear deck cover support structure is increased.

  Further, the load in the vehicle width direction is received obliquely by the outer mounting portions 42f and 42g of the second bracket 42, and the load ratio in the shear direction is increased with respect to the load in the vehicle width direction. The load in the direction in which the joint between the first bracket 41 and the first bracket 41 is peeled off is reduced, and the first bracket 41 is prevented from peeling from the wheel house inner 15. It is configured to increase rigidity.

  As shown in FIGS. 6 and 8, the mounting seat 42 a of the base portion 6 </ b> B of the link mechanism 6 is fastened and fixed to the mounting seat 42 a of the second bracket 42 by using mounting members 49 such as bolts and nuts.

  As shown in FIGS. 9 and 11, on the extension line of the inner mounting portions 41c and 41d of the first bracket 41, the outer mounting portions 41a and 41b of the first bracket 41 and the second bracket 42, respectively. , 42f, and 42g are provided so as to transmit the load along the surface direction of the wheel house inner 15 without pushing down the wheel house inner 15 with the load input from the rear deck cover 3.

  Further, as shown in FIGS. 10 and 11, on the extension line of the side surface on the inner side in the vehicle width direction of the wheel house inner 15 that extends from the above-described damper support portion 22 that is a load input point to which the load from the suspension is input when the vehicle travels. In addition, the support portions of the second bracket 42 (see the attachment portions 42d, 42e, 42f, and 42g) are provided obliquely with respect to the horizontal direction, whereby both the first bracket 41 and the second bracket 42 The peeling load is reduced, and a large amount of load is accepted as a shear load, which is advantageous in terms of bonding strength.

  By the way, as shown in FIGS. 1-4, the oil filler opening 50 is provided in the rear fender outer 18 which is the vehicle body side part of the vehicle left side. As shown in FIGS. 5 and 12, the fuel filler opening 50 includes a cup portion 51. The cup portion 51 is provided so as to protrude inward in the vehicle width direction from the rear fender 20.

  As shown in FIG. 12, the side panel 34 on the left side, which is the end portion of the rear upper member 30, is provided on the side where the above-described fuel filler port 50 and its cup portion 51 are disposed (that is, the vehicle left side). A downward bent portion 34A that is bent downward so as to avoid the cup portion 51 is formed.

  On the other hand, as shown in FIGS. 6, 8, and 10, the side on the right side of the vehicle, which is the end of the rear upper member 30 on the side where the downward bent portion 34 </ b> A is formed (the vehicle left side) and the opposite side in the vehicle width direction. The panel 35 is formed with an opening 35a through which a jack 60 as an auxiliary machine can be inserted from the inside of the trunk room 4 to the cabin side. A flange 35b that protrudes forward of the vehicle is integrally formed at the edge of the opening 35a. Is formed.

FIG. 13 is a cross-sectional view taken along the line D-D in FIG. 5, and as shown in FIGS. It is configured to overlap in a side view.
Further, the above-described downward bent portion 34A includes a front wall 34a and an upper wall 34b that is located on the inner side in the vehicle width direction of the fuel filler opening 50 and extends in the front-rear direction, and has a side cross-section formed in an L shape. Furthermore, a joining tongue piece 34c is integrally formed from the lower part of the front wall 34a to the front, and the joining tongue piece 34c is fixed to the first bracket 41 and the wheel house inner 15 by welding.

  As shown in FIGS. 12 and 13, the lower bent portion 34 </ b> A of the left side panel 34 of the rear upper member 30 overlaps the fuel filler port 50 in a vehicle side view, thereby improving the layout of the fuel filler port 50. When the fuel filler port 50 overlaps the downward bent portion 34A, the space in the trunk room 4 is not obstructed by the fuel filler pipe, and the trunk room space is secured.

  Further, the downward bent portion 34A is provided with a front wall 34a and an upper wall 34b, and the side cross-section is formed in an L shape, thereby achieving both improvement of the rigidity of the vehicle body and improvement of the rigidity of the fuel filler port portion at the side of the vehicle body. It is formed to aim at. Here, the upper wall 34 b of the downward bent portion 34 </ b> A is joined to the trunk side upper panel 27.

Further, the rear upper member 30 described above is disposed rearward to a position where it overlaps with the fuel filler port 50, so that the auxiliary equipment arrangement space in front of the rear upper member 30 (in this embodiment, the arrangement space of the opening and closing roof 1) can be increased. It is composed.
In particular, in a vehicle having a short vehicle front-rear length at the rear of the vehicle body, the vehicle body rigidity is ensured while expanding the accessory arrangement space and the trunk space.

As shown in FIGS. 6 and 13, the side panel 35 on the right side of the vehicle, which is the side opposite to the vehicle width direction on the side where the downward bent portion 34A is formed (the vehicle left side), has an upper wall 35c and an L-shaped bottom A wall 35d and the above-described opening 35a formed between the upper and lower walls 35c and 35d are provided.
As shown in FIG. 13, the opening 35 a described above is formed so that a jack 60, which is a long object as an auxiliary machine, can be inserted into the cabin side from the trunk room 4.

  Further, as shown in FIG. 6, a joining tongue piece 35e extending forward from the lower portion is integrally formed at the lower portion of the L-shaped lower wall 35d, and the joining tongue piece 35e is formed as described above. Three pieces of the first bracket 41 and the wheel house inner 15 are fixed by welding.

  As shown in FIGS. 6 and 13, the lower bent portion 34A is formed on one end side in the vehicle width direction of the rear upper member 30 (left end side in this embodiment), and the other end side in the vehicle width direction (this side) In the embodiment, a side panel 35 as a rear upper member side portion is provided on the right end side), thereby balancing the left and right rigidity of the vehicle, and further from the inside of the trunk room 4 through the opening 35a described above. Thus, a storage space for an auxiliary machine (see jack 60) that can be inserted into the cabin is secured. Here, the upper wall 35 c of the side panel 35 described above is joined to the trunk side upper panel 27.

  As shown in FIG. 8, an auxiliary equipment storage section 60 </ b> A for storing a jack 60 that is an auxiliary equipment at the opposite end of the rear upper member 30, that is, at the right end of the vehicle, has an open / close roof 1 or a rear deck cover 3. It is located behind the link mechanism that opens and closes (in this embodiment, the link mechanism 6 that opens and closes the rear deck cover 3).

As shown in FIG. 8, the auxiliary machine storage section 60 </ b> A is positioned behind the link mechanism 6 that opens and closes the rear deck cover 3, so that the dead space can be effectively used to store the jack 60 as an auxiliary machine. It is configured as follows.
Further, the front portion of the above rear upper member 30 is set in the roof storage chamber 2 of the open car, and the passenger compartment 7 as a vehicle compartment is located further forward of the roof storage chamber 2. It is configured to prevent the jack 60 as an auxiliary device from being scattered into the vehicle compartment at the time of a rear collision.

  14A is a cross-sectional view taken along the line EE in FIG. 5, and FIG. 14B is a cross-sectional view taken along the line GG in FIG. (A) of FIG. 5 is a sectional view taken along the line H-H in FIG. 5, and FIG. 15 (b) is a sectional view taken along the line JJ in FIG. 5.

  As shown in FIG. 13 (rear view), which is a cross-sectional view taken along the line D-D in FIG. 5, the above-described rear upper member 30 includes connecting portions 30 </ b> D and 30 </ b> D having a predetermined width connected to the damper support portion 22. Has left and right. Each of the left and right connecting portions 30D, 30D has a predetermined width corresponding to the width of the upper mounting bracket 23 or the rear mounting bracket 29 in the vehicle width direction.

  As shown in FIGS. 14B and 15A, the center side in the vehicle width direction of the rear upper member 30 with respect to the connecting portion 30D is surrounded by the lower panel 31, the front panel 32, and the rear panel 33. While formed in the closed cross-sections S1 and S2, the side panel 35 is located on the outer side in the vehicle width direction than the above-described connecting portion 30D of the rear upper member 30 as shown in FIGS. 14 (a) and 15 (b). The side panel 34 is formed in an open cross section.

As a result, the connecting portions 30D and 30D that connect the left and right damper support portions 22 and 22 of the rear upper member 30 are connected in the vehicle width direction by the highly rigid members having the closed cross sections S1 and S2, and from the connecting portions 30D and 30D. However, the outer side in the vehicle width direction has an open cross section, and the local rigidity is low, avoiding stress concentration at the connecting part with the peripheral members, and connecting the left and right damper support parts 22 and 22 with high rigidity. In addition, the reinforcement to the peripheral members is omitted, and the weight is reduced.
That is, the rear upper member 30 is slim and highly rigid, and is configured to avoid stress concentration on the peripheral members (peripheral members on the side in the vehicle width direction of the side panels 34 and 35) and to omit reinforcement thereof. It is.

  As shown in FIGS. 5 and 15A, the closed cross section S2 of the rear upper member 30 on the center side in the vehicle width direction includes a rear panel 33 as a rear surface portion, a lower panel 31 and a front panel 32 as other surface portions. The rear surface portion (rear panel 33) is a panel connected to the opening edge 4a of the trunk room 4, and this panel (rear panel 33) is a panel (lower panel 31, front panel) constituting other surface portions. It is formed thinner than 32).

  As a result, both the rigidity of the rear upper member 30 and the function as the trunk room opening edge 4a panel of the rear upper member 30 are compatible, and there is no stress concentration on the trunk room 4 while reducing the load. It is configured to transmit the load and contribute to the high rigidity of the entire vehicle body.

  Further, as is clear from the comparison between FIG. 14B and FIG. 15A, the rear upper member 30 has a closed section S1 of the connecting portion 30D with the damper support portion 22 described above as a vehicle having the other portion. The closed cross-sectional area is the largest with respect to the closed cross-section S2 on the center side in the width direction, and the closed cross-section peripheral length facing only the closed cross-section S1 is shorter than the closed cross-section peripheral length facing only the closed cross-section S2. Are formed so as to be concentrated substantially in the center in the front-rear direction and the vertical direction.

That is, the rear upper member 30 is formed between the connecting portions 30D and 30D so that the cross-sectional shape differs between the closed cross section S1 on the outer side in the vehicle width direction and the closed cross section S2 on the inner side in the vehicle width direction.
The connecting portion 30D of the above-described rear upper member 30 functions as a joint portion, and since the cross-sectional area of the closed cross section S1 is the largest, it is balanced against stress from each direction, and the connecting portion 30D The load is received and the load is smoothly transmitted to both sides of the connecting portion 30D in the vehicle width direction.
As shown in FIGS. 14 and 15, left and right damper support portions 22, 22 are provided on the front lower side of the rear upper member 30.

  As shown in FIG. 15A, the lower panel 31 constituting the rear upper member 30 has a front flange portion 31a and a rear flange 31b. The front panel 32 has a lower flange 32a and an upper flange 32b. Further, the rear panel 33 has a front flange 33a and a rear flange 33b.

  And as shown to (a) of FIG. 15, the vehicle width direction center part of the rear upper member 30 is the front lower extension part 30F extended in the front lower direction from the center part of closed cross-section S2, and the upper side extension part 30U extended upwards. And a three-pronged closed section having a rear extension 30R extending rearward.

  As shown in FIG. 15A, the front lower extension 30F is formed by a joint structure of the flanges 31a and 32a, and the upper extension 30U is formed by a joint structure of the flanges 32b and 33a. The rear extension 30R described above is formed by a joint structure of the flanges 31b and 33b.

  With this configuration, the left and right damper support portions 22, 22 are arranged with the center of the cross section S2 of the rear upper member 30 behind them to form a slim three-way closed cross section. While expanding the arrangement space of other members such as an auxiliary machine (opening and closing roof 1 in this embodiment) between the damper support portions 22 and 22, the left and right damper support portions 22 and 22 are connected to the input load from the damper support portion 22. Is firmly received in the direction in which the front lower extension 30F extends, and another extension (upper extension 30U) extending in the remaining bifurcated direction of the three-way closed cross section so that the front lower extension 30F is not displaced. The rear extension 30R) is reinforced.

As shown in FIG. 13, the connecting portion 30D of the rear upper member 30 with the damper support portion 22 includes side panels 34 and 35 positioned on the left and right in the vehicle width direction, a lower panel 31 positioned on the center side in the vehicle width direction, It is set at a joint portion between the front panel 32 and the rear panel 33.
Thus, the number of panels in the connecting portion 30D is increased to improve the yield strength against the shear load, and the load from the damper is reliably received at this portion (the connecting portion 30D).
In the figure, reference numeral 61 denotes a brace side panel that connects the rear fender inner 19 extending in the vehicle longitudinal direction and the end of the rear upper member 30 extending in the vehicle width direction.

  In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inner side in the vehicle width direction, arrow OUT indicates the outer side in the vehicle width direction, and arrow UP indicates the upper side of the vehicle. Indicates.

  As described above, the rear vehicle body structure of the vehicle according to the above embodiment is a rear vehicle body structure including the rear upper member 30 that connects the left and right side walls of the vehicle body in the vehicle width direction. A connecting portion 30D to be connected to the portion 22, and a center side in the vehicle width direction from the connecting portion 30D of the rear upper member 30 is formed in a closed cross section S1, S2, and the connecting of the rear upper member 30 is The outer side in the vehicle width direction than the portion 30D is formed in an open cross section (see FIGS. 5, 13, 14, and 15).

According to this configuration, the left and right damper support portions 22 and 22 of the rear upper member 30 are connected by the high-rigidity members having the closed cross sections S1 and S2, and the outer side in the vehicle width direction from the connection portion 30D is an open cross section, which is locally The rigidity is reduced, stress concentration at the connecting portion with the peripheral member is avoided, the left and right damper support portions 22 can be connected with high rigidity, and the reinforcement of the peripheral member can be omitted, and the weight is reduced. Can be achieved.
In short, while the rear upper member 30 is slim and highly rigid, stress concentration on the peripheral members can be avoided and reinforcement thereof can be omitted.

  In one embodiment of the present invention, the closed cross section S2 of the rear upper member 30 on the center side in the vehicle width direction has a rear surface portion (see the rear panel 33) and another surface portion (see the lower panel 31 and the front panel 32). The rear surface portion (rear panel 33) is constituted by a panel connected to the opening edge 4a of the trunk room 4, and the panel (see rear panel 33) is a panel constituting the other surface portion (see lower panel 31 and front panel 32). (See FIG. 15A).

According to this configuration, it is possible to achieve both the high rigidity of the rear upper member 30 and the function of the rear upper member 30 as the trunk room opening edge 4a panel.
Further, there is no stress concentration on the trunk room 4, and the load can be transmitted while relaxing the load, thereby contributing to the high rigidity of the entire vehicle body.

  In one embodiment of the present invention, the rear upper member 30 has a closed cross-sectional area S1 of the connecting portion 30D with the damper support portion 22 that is the largest in the closed cross-sectional area with respect to the other portions. It is formed so that the cross-sectional shape differs between the inner side in the direction (see FIG. 14B and FIG. 15A).

According to this configuration, the connecting portion 30D of the rear upper member 30 functions as a joint portion and has the largest closed cross-sectional area (closed cross-sectional area of the closed cross-section S1). The balance is achieved, and the load from the damper can be received by the connecting portion 30D, and the load can be smoothly transmitted to both sides in the vehicle width direction.
That is, it is possible to achieve both load reception and stress dispersion.

  In one embodiment of the present invention, the damper support portion 22 is provided at the front lower side of the rear upper member 30, and the vehicle width direction central portion of the rear upper member 30 is a front lower portion extending from the center of the cross section to the front lower side. It is formed in a three-pronged closed cross section having an extension 30F, an upper extension 30U extending upward, and a rear extension 30R extending rearward (see FIGS. 5 and 15A).

  According to this configuration, the cross-sectional center of the rear upper member 30 (the cross-sectional center of the closed cross-section S2) is disposed behind the left and right damper support portions 22 and 22 to form a thin three-way closed cross-section. As a result, the left and right damper support portions 22 and 22 are separated from the damper support portion 22 while expanding the arrangement space of other members such as an auxiliary machine (see the opening and closing roof 1) between the left and right damper support portions 22 and 22. Is firmly received in the direction in which the front lower extension 30F extends, and another extension (upper extension) extending in the remaining two-way direction of the three-way closed cross section so that the front lower extension 30F is not displaced. The portion 30U and the rear extension 30R) can be reinforced.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The rear surface portion of the present invention corresponds to the rear panel 33 of the embodiment,
Similarly,
Other surface portions correspond to the lower panel 31 and the front panel 32,
The present invention is not limited to the configuration of the above-described embodiment.
For example, in the above-described embodiment, the embodiment in the case where the rear body structure of the automobile is employed in the open car is illustrated. However, the rear body structure of the automobile of the present invention can be applied to vehicles other than the open car. .

  As described above, the present invention is useful for a rear body structure of an automobile provided with a rear upper member that connects left and right side walls of a vehicle body in the vehicle width direction.

4 ... Trunk room 4a ... Opening edge 22 ... Damper support part 30 ... Rear upper member 30D ... Connection part 30F ... Front lower extension 30R ... Rear extension 30U ... Upper extension 31 ... Lower panel (other surface part)
32 ... Front panel (other surface)
33 ... Rear panel (rear part)
S1, S2 ... Closed section

Claims (4)

A rear vehicle body structure including a rear upper member for connecting left and right side walls of a vehicle body in a vehicle width direction,
The rear upper member has a connecting portion connected to the damper support portion,
A center side in the vehicle width direction from the connecting portion of the rear upper member is formed in a closed cross section,
A rear body structure of an automobile, wherein the rear upper member is formed in an open cross section outside the connecting portion in the vehicle width direction. The closed cross section of the rear upper member at the center in the vehicle width direction has a rear surface portion and another surface portion,
2. The rear body structure of an automobile according to claim 1, wherein the rear surface portion is constituted by a panel connected to an opening edge of a trunk room, and the panel is formed thinner than a panel constituting the other surface portion. The rear upper member is formed so that the closed cross section of the connecting portion with the damper support portion has the largest closed cross sectional area with respect to the other portions, and the cross sectional shape is different between the vehicle width direction outer side and the vehicle width direction inner side. Item 3. The rear body structure of an automobile according to Item 1 or 2. The damper support portion is provided at the front lower side of the rear upper member,
A center part in the vehicle width direction of the rear upper member includes a front lower extension extending forward and downward from the center of the cross section,
The rear body structure of a vehicle according to any one of claims 1 to 3, wherein the rear body structure is formed in a three-pronged closed section having an upper extension extending upward and a rear extension extending rearward.

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