JP6699222B2 - Car body structure - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a vehicle body structure that connects an on-vehicle product arranged under a floor of a vehicle and a vehicle body.

  2. Description of the Related Art Conventionally, a vehicle equipped with an exhaust gas purification system that reduces and purifies exhaust gas components is known to be equipped with an additive tank having a reducing action on a substance to be purified. When the substance to be purified is nitrogen oxide (NOx), additives such as urea aqueous solution and ammonia aqueous solution are stored inside the tank. Further, it is proposed that the position of the tank is set, for example, under the floor of the vehicle. With such a layout, a space in the vehicle compartment is secured, and deterioration of habitability in the vehicle compartment due to leakage of additives is prevented.

  Vehicle-mounted products such as an additive tank and a fuel tank arranged under the floor of the vehicle are fixed to the vehicle via a bracket. At this time, as the object to which the bracket is fixed, a structural member such as a side member or a cross member, which has relatively high rigidity and strength, is mainly selected from the vehicle body. For example, Patent Document 1 discloses a fixing structure in which a support band hung on the lower surface of a urea tank is screwed to the lower surfaces of a side member and a cross member.

Japanese Patent No. 4826612

  In the urea tank fixing structure described in Patent Document 1, the joint surfaces of the fixed object and the object are both horizontal. That is, these members are fastened and fixed such that both ends of the support band, which is the fixed object, are in surface contact with the lower surface of the structural member, which is the fixed object. Therefore, the inclinations of the joint surfaces at both ends of the support band are substantially the same, and the plurality of joint surfaces are arranged on the same plane.

  On the other hand, arranging the joint surfaces on the same plane may be a structural weak point. For example, the direction of the load acting on the joint may change due to the change of the vehicle body posture, and the shear load may act on the screw. In this case, a shear load in the same direction acts on all the screws attached to the support band, which may cause a failure in the fixed state. The same applies to the case of welding fixing instead of screw fixing (fastening and fixing with bolts and nuts). When both ends of the support band are spot-welded to the lower surface of the structural member, the acting direction of the load at all welding points is the welding separation direction, which may be a disadvantageous structure in terms of strength.

  One of the objects of the present invention was devised in view of the above problems, and it is to provide a vehicle body structure that is advantageous in terms of strength against changes in the direction of action of load. It should be noted that the present invention is not limited to this purpose, and it is also possible to obtain operational effects that are derived from the respective configurations shown in "Modes for carrying out the invention" to be described later, and which cannot be obtained by conventional techniques. Can be positioned as a purpose.

(1) The vehicle body structure disclosed herein is a vehicle body structure that connects an in-vehicle item placed under the floor of the vehicle and the vehicle body. The vehicle body structure includes a floor panel that is horizontally deployed, a rear end panel that is connected to a rear end of the floor panel and extends upward, and the vehicle panel that is joined to the floor panel and the rear end panel. And a bracket for connecting an article to the vehicle body. The bracket includes a first horizontal wall portion extending along the floor panel, a first vertical wall portion extending downward from an end portion of the first horizontal wall portion, and the first vertical wall portion. And a second vertical wall portion that is disposed to face the vehicle front-rear direction and that extends along the rear end panel, and that connects the lower ends of the first vertical wall portion and the second vertical wall portion. And two lateral wall portions. Further, the first joint surface is arranged between the first lateral wall portion and the floor panel, and the second joint surface is arranged between the second vertical wall portion and the rear end panel. In addition, the second joint surface is arranged at two positions sandwiching the contact portion between the reinforcing portion of the floor panel and the rear end panel while avoiding the contact portion in the vehicle width direction.

It is preferable that the floor panel is a member that partitions the interior and exterior of the vehicle in the vertical direction, whereas the rear end panel is a member that partitions the interior and exterior of the vehicle in the front-rear direction of the vehicle. The rear end panel may be vertical or may have an inclined slope.
(2) It is preferable that the first joint surface is arranged at a position where the first joint surface and the reinforcing portion of the floor panel overlap each other.
(3) It is preferable that the reinforcing portion is formed by a reinforcing member joined to the floor panel. In this case, it is preferable that the reinforcing member has a first hat-shaped cross section that forms a closed cross section with the floor panel. Further, it is preferable that the first joint surface is arranged at a position where the first joint surface and the flange of the reinforcing member overlap each other.

(4) It is preferable that the second vertical wall portion has a second hat-shaped cross section that forms a closed cross section with the rear end panel. In this case, it is preferable that the second joint surface is arranged on the flange portion of the second vertical wall portion.
(5 ) It is preferable that the second vertical wall portion has an opening formed by perforating a portion facing the contact portion.

( 6 ) It is preferable that the second horizontal wall portion is provided between the first vertical wall portion and the second vertical wall portion and serves as a mounting surface for the vehicle-mounted product.
( 7 ) It is preferable that the first vertical wall portion connects the second horizontal wall portion and the first horizontal wall portion with a forward upward slope.
( 8 ) It is preferable that the first vertical wall portion has a rib that bulges into a semi-cylindrical shape.

  By providing the bracket with two joining surfaces that are joined to the vehicle body and have different slopes, it is possible to improve adaptability to changes in the acting direction of the load. Also, by adopting a structure that allows deformation of the space surrounded by the floor panel, the first vertical wall portion, the second horizontal wall portion, and the second vertical wall portion with respect to the input load, the protection of in-vehicle products is improved. You can Therefore, it is possible to provide a vehicle body structure that is advantageous in terms of strength against changes in the direction of action of the load.

It is a bottom view of the vehicle to which the vehicle body structure of the embodiment is applied. It is sectional drawing of a bracket and a tank. FIG. 3 is a perspective view (looking up direction) showing a floor panel and a rear end panel around the bracket by cutting. FIG. 3 is a perspective view (looking down direction) showing a floor panel and a rear end panel around the bracket by cutting. Each of (A) to (C) is a cross-sectional view of the bracket [A-A cross-sectional view, BB cross-sectional view, CC cross-sectional view of FIG. 4].

  A vehicle body structure as an embodiment will be described with reference to the drawings. Note that the embodiments described below are merely examples, and there is no intention to exclude various modifications and application of techniques that are not explicitly shown in the following embodiments. Each configuration of the present embodiment can be variously modified and implemented without departing from the spirit thereof. Also, they can be selected or combined as needed.

[1. Constitution]
The vehicle body structure of this embodiment is applied to the vehicle 10 shown in FIG. Below the floor of the vehicle 10, a tank 2 (vehicle-mounted product) is fixed to the vehicle body via a bracket 1. The tank 2 is a container that stores an additive (for example, urea aqueous solution, ammonia aqueous solution) used in a urea SCR system (Urea Selective Catalytic Reduction System) for exhaust gas purification. The urea SCR system is a type of exhaust gas purification system for purifying nitrogen oxides (NOx) contained in the exhaust gas of an engine. In the urea SCR system of the present embodiment, the aqueous urea solution is injected upstream of the NOx selective reduction catalyst interposed in the exhaust passage, and the ammonia produced by hydrolysis of urea is used as the reducing agent, and the nitrogen oxide is used as the catalyst. Reduced to nitrogen above. This type of urea SCR system is widely used in automobiles, work machines, ships, power generation facilities, etc. equipped with a diesel engine or a lean burn engine.

  As shown in FIG. 1, on the lower surface side of the floor panel 6 of the vehicle 10, a hollow cylindrical side member 4 and a cross member 5 that function as frame members are provided. The side members 4 are a pair of structural members arranged at intervals in the vehicle width direction (horizontal direction), and extend in the vehicle length direction (vehicle front-rear direction) of the vehicle 10. The cross member 5 is a hollow cylindrical structural member that is connected to the left and right side members 4, and extends in the vehicle width direction of the vehicle 10. The floor panel 6 is a member that is deployed in a substantially horizontal direction. The side member 4 and the cross member 5 are integrally formed with the floor panel 6 by welding and fixing a rail member having a hat-shaped cross section to the lower surface of the floor panel 6, for example.

  The left end and the front end of the tank 2 are attached to the side member 4 and the cross member 5 via arbitrary fixtures 9. The fixture 9 is, for example, a metal member formed by bending a plate material into a crank shape, and has one end fixed to the lower surfaces of the side member 4 and the cross member 5 and the other end fixed to the tank 2. Further, a silencer 3 (muffler) for reducing exhaust noise is arranged on the right side of the tank 2. The tank 2 and the silencer 3 are arranged side by side in the vehicle width direction behind the axle of the rear wheels. It should be noted that the lower part of the tank 2 may be covered with a cover member in order to prevent chipping wear due to rocks coming from the road surface and contamination due to muddy water.

  As shown in FIG. 2, a rear end panel 7 is erected on the rear side of the floor panel 6. The rear end panel 7 is a member that is continuous with the rear end of the floor panel 6 and extends upward to form a wall portion, and is fixed to the floor panel 6 and the side member 4. The floor panel 6 is a member that vertically partitions the inside and outside of the vehicle interior including the trunk room, while the rear end panel 7 is a member that vertically partitions the inside and outside of the vehicle interior. However, the inclination angle of the rear end panel 7 with respect to the floor panel 6 is not necessarily a right angle. In the present embodiment, a space above the floor panel 6 and in front of the rear end panel 7 is a vehicle compartment (or a trunk room), and the rear end panel 7 is inclined rearward so that the vehicle compartment becomes wider toward the top. Arranged.

  A reinforcement member 8 (reinforcement portion) is attached to the upper surface side of the floor panel 6. The reinforcing member 8 is a rail member having a hat-shaped cross section (first hat-shaped cross section), and forms a hollow cylindrical structure with the floor panel 6. The extending direction of the reinforcing member 8 is the front-rear direction, and the reinforcing member 8 is arranged along the vehicle center line C so as to be substantially equidistant from each of the pair of left and right side members 4. The flange of the reinforcing member 8 is joined to the floor panel 6 in a surface contact state. Further, the rear end portion 19 of the reinforcing member 8 is joined to the rear end panel 7 in a surface contact state. Instead of or in addition to the structure using the reinforcing member 8 which is separate from the floor panel 6, the plate thickness of the floor panel 6 itself is changed or bent in the plate thickness direction to reinforce the plate surface. Good. In this case, a high-rigidity reinforcing portion having a reinforced plate surface may be extended in the front-rear direction.

  The rear end of the tank 2 is attached to both the floor panel 6 and the rear end panel 7 via the bracket 1. As shown in FIG. 2, the bracket 1 is a mounting member formed in a substantially inverted trapezoidal shape in a side view. The front end of the bracket 1 is joined to the floor panel 6 from below, and the rear end of the bracket 1 is joined to the rear end panel 7 from behind. Although the joining method of the bracket 1 in the present embodiment is spot welding joining, fastening joining using bolts, nuts or the like may be used. Hereinafter, the former joint portion will be referred to as the first joint surface 11, and the latter joint portion will be referred to as the second joint surface 12. The first joint surface 11 is arranged at a position overlapping the reinforcing member 8 in a top view. In addition, as shown in FIG. 1, the first joint surface 11 and the second joint surface 12 are vertically arranged along the vehicle center line C in a top view of the vehicle 10.

  FIG. 3 is a perspective view of the bracket 1 viewed from the lower surface side of the vehicle 10. The bracket 1 is provided with a first horizontal wall portion 21, a first vertical wall portion 22, a second vertical wall portion 23, and a second horizontal wall portion 24. In the present embodiment, the bracket 1 is molded by pressing a single plate material, and the above-mentioned parts 21 to 24 are integrally formed. In addition, it is also possible to integrally form each part 21-24 by forming it separately and joining each other.

  The first lateral wall portion 21 is a planar portion extending (formed) along the floor panel 6, and is a portion that is arranged substantially horizontally. The first lateral wall portion 21 is a portion joined to the lower surface of the floor panel 6. That is, the first joint surface 11 is arranged between the floor panel 6 and the first lateral wall portion 21. In addition, the shape of the first lateral wall portion 21 of the present embodiment is a U shape in which the front side of the vehicle is opened in a bottom view, and at least the vicinity of both ends in the left-right direction is in a shape capable of making surface contact with the lower surface of the floor panel 6. It is formed. The vicinity of the central portion in the left-right direction may be in a state of floating from the lower surface of the floor panel 6 (that is, non-contact).

  The spot welding position on the first joint surface 11 is set to a position where the floor panel 6 and the reinforcing member 8 are in surface contact with each other. Further, as shown in FIG. 5(A), the first lateral wall portion 21 (first joining surface 11) is joined to the flange of the reinforcing member 8 so as to sandwich the floor panel 6 in the vertical direction. Spot welding is performed at the position where is overlapped. Thereby, the load is easily transmitted between the first lateral wall portion 21 (first joining surface 11) and the reinforcing member 8, and the structural strength of the bracket 1 is increased. In the present embodiment, as shown by hatching in FIG. 3, a pair of left and right spot welding points are arranged side by side in the vehicle width direction.

The first vertical wall portion 22 is a planar portion that is formed by extending (extending) downward from the rear end portion of the first horizontal wall portion 21. The first vertical wall portion 22 is provided such that its front end side overlaps with the rear end side of the first horizontal wall portion 21, and is arranged so as to have a downward slope toward the rear of the vehicle. The dimension of the first vertical wall portion 22 in the vehicle width direction is substantially the same as the dimension of the first lateral wall portion 21 in the vehicle width direction.
As shown in FIG. 5(B), a pair of left and right ribs 16 formed in a shape that bulges downward in a semi-cylindrical shape is provided on an end side in the vehicle width direction of the first vertical wall portion 22. .. These ribs 16 are formed in order to efficiently transfer the load acting on the second lateral wall portion 24, which will be described later, to the two spot welding points, and the ribs 16 are rearward from the positions corresponding to the respective spot welding points. It is arranged with a space in the vehicle width direction. Each rib 16 is extended so as to connect the spot welded portion and the second lateral wall portion 24 at a substantially shortest distance.

  The second vertical wall portion 23 is a planar portion that is disposed so as to face the first vertical wall portion 22 in the front-rear direction and that is extended (formed) along the rear end panel 7. The second vertical wall portion 23 is formed in an upward slope shape toward the rear. As shown in FIG. 5C, the second vertical wall portion 23 has a hat-shaped cross section (second hat-shaped cross section) that forms a closed cross section with the rear end panel 7, and a second joint is formed on the flange portion thereof. A surface 12 is provided. The width (dimension in the vehicle width direction) of the closed cross section is substantially the same as the width of the closed cross section formed by the reinforcing member 8. Further, as shown in FIG. 3, the second vertical wall portion 23 has a substantially triangular standing surface with respect to the rear end panel 7. In other words, the overall shape of the second vertical wall portion 23 can conform to the triangular prism shape having the triangular side surface 20 as the bottom surface. As a result, the bracket 1 is less likely to be deformed by the load acting in the in-plane direction of the side surface 20 (inward in the vertical plane), and sufficient rigidity is secured.

  The spot welding position on the second joint surface 12 is set so as to avoid a position where the rear end panel 7 and the reinforcing member 8 are in surface contact with each other. As shown in FIG. 5(C), the second joint surface 12 is provided on both left and right sides of the rear end portion 19 of the reinforcing member 8, and spot welding is performed at a position where the rear end panel 7 and the second joint surface 12 overlap each other. To be done. In the present embodiment, a pair of left and right spot-welded portions are arranged side by side in the vehicle width direction, and a layout in which the contact portion between the rear end panel 7 and the rear end portion 19 of the reinforcing member 8 is sandwiched by the pair of spot-welded portions. It is said that.

  The slope of the first lateral wall portion 21 (first joint surface 11) is substantially horizontal and is the same as the slope of the floor panel 6. Therefore, the shearing direction in the first joint surface 11 (the direction in which the shear stress acts on the welded portion) is horizontal. On the other hand, the slope of the second joint surface 12 is the same as the slope of the rear end panel 7, and is a slope inclined upward toward the rear. Therefore, the shearing direction in the second joint surface 12 is different from that in the first joint surface 11 (a tilting direction and a direction intersecting the horizontal direction).

  As shown in FIG. 2, the second joint surface 12 extends to a position higher than the floor panel 6 in a side view, and thus spot welding may be performed at a plurality of positions in the vertical direction as well. In this case, two spot welding rows are formed at intervals in the vehicle width direction, and the rear end portion 19 of the reinforcing member 8 is arranged between these spot welding rows. In the present embodiment, as shown by hatching in FIG. 3, a pair of left and right spot welding points is set as one set, and three sets of spot welding points are arranged in the vertical direction.

  The second horizontal wall portion 24 is a planar portion that connects the lower end portion of the first vertical wall portion 22 and the lower end portion of the second vertical wall portion 23, and includes the first joint surface 11 and the second joint surface 12. It is placed between and. The second lateral wall portion 24 serves as a mounting surface for mounting the tank 2. The position of the second lateral wall portion 24 in the height direction is set below the floor panel 6. The slope of the second lateral wall portion 24 (the inclination of the surface in the state where the bracket 1 is mounted on the vehicle 10) is substantially horizontal, and the mounting hole 14 for fastening bolts is arranged in the center portion thereof.

  As shown in FIG. 4, the rear end portion 19 of the reinforcing member 8 is a portion formed by extending only the web surface of the hat-shaped cross section rearward along the surface of the rear end panel 7, and with respect to the rear end panel 7. Joined by spot welding. Further, as shown in FIG. 5C, an opening 18 is provided at a portion of the second vertical wall portion 23 of the bracket 1 that faces a contact portion between the rear end portion 19 and the rear end panel 7. As a result, even when the bracket 1 is attached, the contact portion between the rear end portion 19 and the rear end panel 7 can be accessed from both front and back sides, and welding workability is improved.

  The main load acting on the bracket 1 is the load of the tank 2 acting vertically downward on the second lateral wall portion 24. This tank load is transmitted to the floor panel 6 side through the rib 16 extending upwardly toward the front of the vehicle, and therefore, in the first joining surface 11 in the peeling direction (direction perpendicular to the welding surface). It is decomposed into a load acting and a load acting in the shearing direction. The load transmitted from the second lateral wall portion 24 to the rear end panel 7 side via the triangular prism structure acts on the second joint surface 12 in the shearing direction.

[2. Action, effect]
[1] The bracket 1 is provided with a first joint surface 11 joined to the floor panel 6 and a second joint surface 12 joined to the rear end panel 7. Here, if the normal line of the first joint surface 11 is called the first normal line and the normal line of the second joint surface 12 is called the second normal line, the first normal line is not parallel to the second normal line. Becomes Thereby, the shearing direction in the first joint surface 11 and the shearing direction in the second joint surface 12 can be made different, and the structural strength of the bracket 1 can be increased.

  Even if the direction of the load acting on the joint changes due to a change in the vehicle body posture, the shearing direction at the first joint surface 11 and the shearing direction at the second joint surface 12 are different, so that the bracket 1 Structural strength can be increased. The same applies to the case where the first joint surface 11 and the second joint surface 12 are fastened and joined by bolts and nuts, and the shearing direction of the first jointing surface 11 and the shearing direction of the second jointing surface 12 are made different. Therefore, the structural strength of the bracket 1 can be increased.

  Further, by mounting the bracket 1 under the floor of the vehicle 10, a closed space surrounded by the floor panel 6, the first vertical wall portion 22, the second vertical wall portion 23, and the second horizontal wall portion 24 is formed in a side view. You can This makes it possible to provide a crushable structure that absorbs an impact by deforming the closed space thereof against an input load on the vehicle body or the tank 2. Accordingly, the displacement of the fixed position of the tank 2 with respect to the vehicle body can be suppressed, and the deformation and damage of the tank 2 can be prevented. Therefore, the protection of the tank 2 can be improved.

  [2] As shown in FIGS. 1 and 3, the first joint surface 11 is joined to a position where the floor panel 6 and the reinforcing member 8 overlap each other. Accordingly, the load of the tank 2 can be efficiently dispersed over the floor panel 6 via the reinforcing member 8. Therefore, the structural strength of the bracket 1 can be increased, and the fixing stability of the tank 2 can be improved. Further, since the reinforcing member 8 is arranged in the center of the floor panel 6, the load of the tank 2 can be easily dispersed over the entire floor panel 6.

  [3] As shown in FIG. 5(A), the joint portion between the first joint surface 11 and the floor panel 6 is set at the overlapping position with the flange of the reinforcing member 8. Thereby, compared with the case where the first joint surface 11 is joined to the inside of the closed cross-section structure, for example, the rigidity of the joint can be increased, and the load can be efficiently dispersed. Further, since the order of the work of welding the reinforcing member 8 and the bracket 1 to the floor panel 6 does not matter, welding workability and workability can be improved.

  [4] As shown in FIG. 5(C), the second joint surface 12 is provided on the flange portion of the second vertical wall portion 23 between the second vertical wall portion 23 and the rear end panel 7, and the second left and right second A closed cross-section structure is formed in a portion sandwiched by the joint surfaces 12. Thereby, the structural strength of the bracket 1 can be increased. Further, since the width of the closed cross-section structure shown in FIG. 5(A) and the width of the closed cross-section structure shown in FIG. 5(C) are almost the same, highly rigid parts can be continuously arranged in the front-rear direction. The rigidity of the floor panel 6 and the rear end panel 7 can be enhanced in a balanced manner.

  [5] The position of the second joint surface 12 is set so as to sandwich the contact portion between the rear end panel 7 and the rear end portion 19 of the reinforcing member 8 in the vehicle width direction. Thereby, the load input to the rear end panel 7 can be efficiently dispersed to the reinforcing member 8 side, and the structural strength of the bracket 1 can be increased. In addition, the spot welding positions on the second joint surface 12 are a set of a pair of left and right spot welding positions, and three sets of spot welding positions are arranged in the vertical direction. Therefore, the load is distributed over the entire rear end panel 7. Can be made

  [6] As shown in FIG. 5C, the opening 18 is provided in the second vertical wall portion 23 of the bracket 1. Accordingly, even when the bracket 1 is attached, the contact portion between the rear end portion 19 and the rear end panel 7 can be accessed from both front and back sides, and welding workability can be improved. Further, since the order of the work of welding the reinforcing member 8 and the bracket 1 to the floor panel 6 does not matter, welding workability and workability can be improved.

  [7] As shown in FIG. 3, by providing the second lateral wall portion 24 between the first joint surface 11 and the second joint surface 12, the load of the tank 2 is applied to both the floor panel 6 and the rear end panel 7. It can be dispersed, and the fixing strength of the bracket 1 can be increased. In particular, the fixing stability of the tank 2 can be improved as compared with a cantilever support structure (for example, a support structure for only the floor panel 6 or a support structure for only the rear end panel 7).

  [8] As shown in FIG. 3, the first vertical wall portion 22 is formed in an upward slope shape from the second horizontal wall portion 24 toward the front. Thereby, the shearing direction component of the load acting on the first joint surface 11 can be increased, and the structural strength of the first joint surface 11 can be increased. Similarly, the second vertical wall portion 23 is formed in an upward slope shape toward the rear from the second horizontal wall portion 24. Thereby, the shearing direction component of the load acting on the second joint surface 12 can be increased, and the structural strength of the second joint surface 12 can be increased. Therefore, the structural strength of the bracket 1 can be increased.

  [9] As shown in FIG. 5(B), the rib 16 is provided on the end side of the first vertical wall portion 22 that connects the first joint surface 11 and the second horizontal wall portion 24. Thereby, the load input to the second lateral wall portion 24 can be efficiently transmitted to the first joint surface 11, and the structural strength of the bracket 1 can be increased. Further, since the shape of the rib 16 is extended so as to connect the spot welded portion of the first joint surface 11 and the second lateral wall portion 24 with a substantially shortest distance, the load transmission to the first joint surface 11 is performed. The efficiency can be improved.

[3. Modification]
In the above embodiment, the bracket 1 of the tank 2 in which the additive of the urea SCR system is stored is described in detail, but the fixing target of the bracket 1 is not limited to the tank 2. For example, the bracket 1 of the above-described embodiment may be used when fixing on-vehicle articles such as the silencer 3, the fuel tank of the engine, the spare tire, and the battery device to the vehicle body. At least by joining the bracket 1 to both the floor panel 6 and the rear end panel 7, the structural strength can be increased.

  Further, in the above-described embodiment, the tank 2 of the urea SCR system has been described in detail, but the type of additive stored in the tank 2 is not limited to urea water. In an exhaust gas purification system using a NOx selective reduction catalyst, ammonia may be used instead of urea. Therefore, the tank 2 can be used as an additive container for storing the aqueous ammonia solution. Further, in an exhaust gas purification system using a DPF (diesel particulate filter), hydrocarbons (HC, unburned fuel) are injected into the exhaust pipe in order to promote combustion of PM (particulate matter). Sometimes. In this case, the tank 2 described above can be used as an additive container for storing fuel.

1 Bracket 2 Tank (vehicle-mounted product)
3 Silencer 4 Side member 5 Cross member 6 Floor panel 7 Rear end panel 8 Reinforcement member (reinforcement part)
9 Fixture 10 Vehicle 11 First joint surface 12 Second joint surface 14 Mounting hole 16 Rib 18 Opening 19 Rear end 20 Side 21 First horizontal wall 22 First vertical wall 23 Second vertical wall 24 Second horizontal wall Department

Claims (8)

A vehicle body structure for connecting a vehicle body and a vehicle body arranged under the floor of the vehicle,
A floor panel that expands horizontally,
A rear end panel connected to the rear end of the floor panel and extending upwardly;
A bracket that joins the floor panel and the rear end panel to connect the vehicle-mounted article to the vehicle body,
The bracket is
A first lateral wall portion formed to extend along the floor panel;
A first vertical wall portion formed to extend downward from the end portion of the first horizontal wall portion,
A second vertical wall portion that is arranged to face the first vertical wall portion in the vehicle front-rear direction, and is formed to extend along the rear end panel;
A second horizontal wall portion that connects the lower ends of the first vertical wall portion and the second vertical wall portion,
A first joint surface is arranged between the first lateral wall portion and the floor panel,
A second joint surface is arranged between the second vertical wall portion and the rear end panel ,
The vehicle body structure, wherein the second joint surface is arranged at two positions sandwiching a contact portion between the reinforcing portion of the floor panel and the rear end panel while avoiding the contact portion in the vehicle width direction . The first bonding surface, characterized in that it is arranged in superimposed position with the reinforcing portion, the vehicle body structure of claim 1, wherein. The reinforcing portion is formed by a reinforcing member joined to the floor panel,
The reinforcing member has a first hat-shaped cross section that forms a closed cross section with the floor panel,
The vehicle body structure according to claim 2, wherein the first joint surface is arranged at a position where the first joint surface and the flange of the reinforcing member overlap each other. The second vertical wall portion has a second hat-shaped cross section that forms a closed cross section with the rear end panel,
The vehicle body structure according to claim 1, wherein the second joint surface is arranged on a flange portion of the second vertical wall portion. The vehicle body structure according to claim 4 , wherein the second vertical wall portion has an opening formed by boring a portion facing the contact portion. The second lateral wall portion is provided between the second vertical wall portion and said first vertical wall portion, characterized in that the mounting surface of the board articles, one of claims 1-5 1 The vehicle body structure described in the item. The vehicle body structure according to claim 6 , wherein the first vertical wall portion connects the second horizontal wall portion and the first horizontal wall portion with a forward upward slope. The vehicle body structure according to claim 6 or 7 , wherein the first vertical wall portion has a rib that is bulged in a semi-cylindrical shape.

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