Vehicle body rear structure

Abstract

The utility model provides a kind of vehicle body rear structure. The structure includes rear bottom plate, rear wall lower plate and rear wall lower plate reinforcing plate across on rear bottom plate and rear wall lower plate, the flange formed on the rear end portion of rear bottom plate is overlapped with rear wall lower plate and is joined by welding, rear wall lower plate reinforcing plate has the reinforcing plate main body that from rear bottom plate is inclinedly extended to rear wall lower plate, and side flange is respectively formed on the two side ends of reinforcing plate main body in vehicle width direction, the side flange includes lower part side flange connected with rear bottom plate by welding and upper part side flange connected with rear wall lower plate, opening is formed on reinforcing plate main body, the position of the opening is opposite the part of flange of rear bottom plate overlapped with rear wall lower plate located rear of reinforcing plate main body. Based on the structure, the bonding strength between rear wall lower plate reinforcing plate and rear bottom plate can be fully ensured, and the welding joint between rear bottom plate and rear wall lower plate can be realized without being hindered by rear wall lower plate reinforcing plate.

Description

Technical Field

[0001] This utility model relates to a rear structure of a vehicle body. Background Technology

[0002] Typically, the rear structure of a vehicle body includes a rear floor, a lower rear panel, and a lower rear panel reinforcement plate. Figure 5 is a perspective view of the right side (the rear end of the right side of the luggage compartment) of the rear floor in the vehicle width direction in a prior art vehicle body rear structure. In Figure 5, arrow FR indicates the front side of the vehicle body, arrow RH indicates the right side of the vehicle body, and arrow UP indicates the upper side of the vehicle body.

[0003] In the rear structure of the vehicle body shown in Figure 5, a raised portion b is formed on the right end of the rear floor a in the vehicle width direction. The upper surface c of this raised portion b is configured as a flat surface extending horizontally. A similar raised portion b is also formed on the left end of the rear floor a in the vehicle width direction. The space between the raised portions b on the left and right sides constitutes a luggage compartment (not shown).

[0004] At the rear end of the rear base plate a, a flange d extending upward by a specified dimension is provided.

[0005] The lower rear panel e is a component that forms the rear end face of the luggage compartment. The lower rear panel e extends in a direction perpendicular to the length of the vehicle, and its lower end f is joined to the flange d of the rear floor panel a by welding.

[0006] The rear lower panel reinforcement plate g is a reinforcing member spanning the raised portion b of the rear floor plate a and the rear lower panel e. The rear lower panel reinforcement plate g is fastened to the rear floor plate a and the rear lower panel e respectively by bolts. Specifically, the rear lower panel reinforcement plate g includes a reinforcement plate body h and side flanges formed on two side ends of the reinforcement plate body h in the vehicle width direction. Each side flange includes a lower side flange i and an upper side flange j.

[0007] The reinforcing plate body h extends obliquely upward from the upper surface of the rear floor a to the lower rear panel e. Specifically, the reinforcing plate body h includes a first oblique portion k at the lower part and a second oblique portion m at the upper part, wherein the oblique angle (oblique angle relative to the horizontal direction) of the second oblique portion m is greater than the oblique angle of the first oblique portion k. Furthermore, the reinforcing plate body h also includes an inner wall portion n extending from the inner edge of each of the first oblique portion k and the second oblique portion m in the vehicle width direction in a direction perpendicular to the vehicle width direction, and an outer wall portion o extending from the outer edge of each of the first oblique portion k and the second oblique portion m in the vehicle width direction in a direction perpendicular to the vehicle width direction.

[0008] In Figure 5, the lower side flange i on the right side is connected to the lower part of the outer side wall part o and extends horizontally. It is fastened to the raised part b of the rear bottom plate a by bolts (fastened by two bolts in Figure 5). In Figure 5, the lower side flange i on the left side is connected to the lower part of the inner side wall part n and extends horizontally. It is fastened to the raised part b of the rear bottom plate a by bolts (fastened by two bolts in Figure 5).

[0009] In Figure 5, the upper side flange j on the right side is connected to the upper part of the outer side wall part o and extends upward at an angle to the lower rear panel e, and is fastened to the lower rear panel e by bolts (in Figure 5, it is fastened by one bolt). In Figure 5, the upper side flange j on the left side is connected to the upper part of the inner side wall part n and extends upward at an angle to the lower rear panel e, and is fastened to the lower rear panel e by bolts (in Figure 5, it is fastened by one bolt).

[0010] However, in the aforementioned prior art rear body structure, since the lower side flanges i of the rear lower panel reinforcement plate g are fastened to the rear floor plate a by bolts, it is difficult to fully ensure the bonding strength between the two. This is because the rear lower panel reinforcement plate g itself is a small component, and its lower side flanges i are even smaller, yet bolt insertion holes for bolt fastening are required, resulting in a reduction in the strength of the lower side flanges i.

[0011] Furthermore, when connecting the rear floor plate a, the lower rear panel e, and the lower rear panel reinforcement plate g, the following procedure is sometimes required: first, the lower rear panel reinforcement plate g is bolted to the rear floor plate a; then, the lower rear panel reinforcement plate g is bolted to the lower rear panel e; and finally, the lower end f of the lower rear panel e is welded to the flange d of the rear floor plate a. However, in this operation, because the area where the flange d of the rear floor plate a overlaps with the lower end f of the lower rear panel e is obstructed by the lower rear panel reinforcement plate g, the welding gun cannot be inserted. Therefore, spot welding cannot be performed in this area, thus limiting the improvement of vehicle body strength. Utility Model Content

[0012] In view of the above situation, the purpose of this utility model is to provide a vehicle body rear structure that can fully ensure the bonding strength between the rear lower panel reinforcement plate and the rear bottom plate, and can achieve the welding joint between the rear bottom plate and the rear lower panel without being hindered by the rear lower panel reinforcement plate.

[0013] As a technical solution to the above-mentioned technical problems, this utility model provides a rear structure of a vehicle body, which includes a rear floor plate, a rear lower panel, and a rear lower panel reinforcing plate spanning the rear floor plate and the rear lower panel. A flange formed on the rear end of the rear floor plate overlaps with the rear lower panel and is joined by welding. The rear lower panel reinforcing plate has a reinforcing plate body extending obliquely upward from the rear floor plate to the rear lower panel, and side flanges formed on two side ends of the reinforcing plate body in the vehicle width direction. The side flanges include a lower side flange connected to the rear floor plate by welding and an upper side flange connected to the rear lower panel. An opening is formed on the reinforcing plate body, and the opening is located directly opposite the portion of the rear floor plate flange overlapping the rear lower panel located behind the reinforcing plate body.

[0014] The advantages of the aforementioned vehicle body rear structure of this utility model are that it can fully ensure the bonding strength between the rear lower panel reinforcement plate and the rear floor plate, and can achieve welding joint between the rear floor plate and the rear lower panel without being hindered by the rear lower panel reinforcement plate. Specifically, since the lower side flange of the rear lower panel reinforcement plate is joined to the rear floor plate by welding, the bonding strength between the two can be fully ensured; at the same time, since an opening is formed on the main body of the reinforcement plate, and the position of the opening is directly opposite the part of the rear floor plate flange that overlaps with the rear lower panel located behind the main body of the reinforcement plate, a welding gun can be inserted into the rear of the main body of the reinforcement plate through the opening to weld the part of the rear floor plate flange that overlaps with the rear lower panel, thereby enabling welding (spot welding) of the overlapping part by clamping the welding gun without being hindered by the rear lower panel reinforcement plate. As a result, the number of welding points between the rear floor plate and the rear lower panel can be increased, improving the body strength.

[0015] In addition, in the above-mentioned rear structure of the vehicle body of this utility model, preferably, raised portions are formed on the left and right ends of the rear floor plate in the vehicle width direction, respectively; the rear lower panel reinforcement plate spans the raised portions of the rear floor plate and the rear lower panel.

[0016] Based on this structure, the space between the two raised sections on the left and right sides of the rear floor can be used as a luggage compartment. At the same time, since the rear lower panel reinforcement plate is located on the outside of the luggage compartment, the space of the luggage compartment will not be reduced. Attached Figure Description

[0017] Figure 1 is a perspective view of the right side portion of the rear floor plate in the vehicle width direction in the rear structure of a vehicle body according to an embodiment of the present invention.

[0018] Figure 2 is a perspective view of the rear lower panel reinforcement plate and its surrounding structure in an embodiment of the present invention.

[0019] Figure 3 is an exploded perspective view showing the rear lower panel reinforcement plate and its surrounding structure in an embodiment of the present invention.

[0020] Figure 4 is a cross-sectional view along line IV-IV in Figure 2, used to illustrate the welding operation between the rear bottom plate and the rear lower plate.

[0021] Figure 5 is a perspective view of the right side of the rear floor plate in the width direction of a vehicle body rear structure in the prior art. Detailed Implementation

[0022] The following description, with reference to the accompanying drawings, describes the rear structure of the vehicle body according to an embodiment of the present invention. In this embodiment, the description mainly focuses on the right-hand rear lower panel reinforcement plate and its surrounding structure, which is one of a pair of left and right rear lower panel reinforcement plates spanning the rear floor and rear lower panel. The left-hand rear lower panel reinforcement plate and its surrounding structure are the same.

[0023] Figure 1 is a perspective view showing the right side portion of the rear floor plate 1 in the vehicle width direction of the rear structure of the vehicle body in this embodiment, and Figure 2 is a perspective view showing the rear lower panel reinforcement plate 3 and its surrounding structure in this embodiment. In Figures 1 and 2, arrow FR indicates the front side of the vehicle body, arrow RH indicates the right side of the vehicle body, and arrow UP indicates the upper side.

[0024] As shown in Figures 1 and 2, a raised portion 11 is formed on the right end of the rear floor plate 1 in the vehicle width direction, and the upper surface 12 of the raised portion 11 is configured as a flat surface extending in the horizontal direction. A similar raised portion 11 is also formed on the left end of the rear floor plate 1 in the vehicle width direction. The space between the raised portions 11 on the left and right sides constitutes the luggage compartment C.

[0025] Additionally, as shown in Figure 1, a rear fender 4 and a rear wheel arch 5 are provided on the outer side of the raised portion 11 in the vehicle width direction. As shown in Figure 2, a flange 13 extending upward by a predetermined length is provided at the rear end of the rear floor plate 1.

[0026] The lower rear panel 2 is a component that forms the rear end face of the luggage compartment C. The lower rear panel 2 extends in a direction perpendicular to the length of the vehicle, and its lower end 21 is joined to the flange 13 of the rear floor panel 1 by welding.

[0027] The rear lower panel reinforcement plate 3 is a reinforcing member spanning the raised portion 11 of the rear bottom plate 1 and the rear lower panel 2. The rear lower panel reinforcement plate 3 is fastened to the rear lower panel 2 by bolts, and the rear lower panel reinforcement plate 3 is connected to the rear bottom plate 1 by welding. Specifically, the rear lower panel reinforcement plate 3 includes a reinforcement plate body 31 and side flanges formed on two side ends of the reinforcement plate body 31 in the vehicle width direction. Each side flange includes a lower side flange 32 and an upper side flange 33.

[0028] The reinforcing plate body 31 extends obliquely upward from the upper surface 12 of the raised portion 11 of the rear floor plate 1 to the lower rear panel 2. Specifically, the reinforcing plate body 31 includes a first oblique portion 31a at the lower part and a second oblique portion 31b at the upper part, wherein the oblique angle (oblique angle relative to the horizontal direction) of the second oblique portion 31b is greater than the oblique angle of the first oblique portion 31a. Furthermore, the reinforcing plate body 31 also includes an inner wall portion 31c extending from the end edges of the first oblique portion 31a and the second oblique portion 31b in the vehicle width direction (left side in FIG. 2) in a direction perpendicular to the vehicle width direction, and an outer wall portion 31d extending from the end edges of the first oblique portion 31a and the second oblique portion 31b in the vehicle width direction (right side in FIG. 2) in a direction perpendicular to the vehicle width direction.

[0029] Furthermore, in this embodiment, an opening 34 extending from the first inclined portion 31a to the second inclined portion 31b is formed on the reinforcing plate body 31. This opening 34 is positioned directly opposite the portion where the flange 13 of the rear bottom plate 1 overlaps with the lower end portion 21 of the rear lower panel 2, located behind the reinforcing plate body 31. The shape of the opening 34 is, for example, quadrilateral when viewed from the vehicle length direction, and its opening area is set to be large enough to accommodate a welding gun used for welding (spot welding) the flange 13 of the rear bottom plate 1 and the lower end portion 21 of the rear lower panel 2. However, the shape of the opening 34 is not limited to a quadrilateral; it can also be a polygon or a circle, etc.

[0030] In Figure 2, the lower side flange 32 on the right side is connected to the lower part of the outer side wall portion 31d and extends horizontally. It is joined to the upper surface 12 of the raised portion 11 of the rear bottom plate 1 at multiple locations by welding (five welding points W in Figure 2). In Figure 2, the lower side flange 32 on the left side is connected to the lower part of the inner side wall portion 31c and extends horizontally. It is joined to the upper surface 12 of the raised portion 11 of the rear bottom plate 1 at multiple locations by welding (three welding points W in Figure 2).

[0031] In Figure 2, the upper side flange 33 on the right side is connected to the upper part of the outer side wall portion 31d and extends obliquely upward to the lower rear panel 2, and is fastened to the lower rear panel 2 by bolts (fastened by one bolt in Figure 2). In Figure 2, the upper side flange 33 on the left side is connected to the upper part of the inner side wall portion 31c and extends obliquely upward to the lower rear panel 2, and is fastened to the lower rear panel 2 by bolts (fastened by one bolt in Figure 2).

[0032] As mentioned earlier, in the existing rear body structure (see Figure 5), the lower side flange i of each rear lower panel reinforcement plate g is fastened to the rear bottom plate a by bolts, which makes it difficult to fully ensure the bonding strength between the two.

[0033] In this embodiment, the lower side flanges 32 of each rear lower plate reinforcing plate 3 are connected to the upper surface 12 of the raised portion 11 of the rear bottom plate 1 at multiple locations by welding, thus ensuring sufficient bonding strength between the two.

[0034] In addition, when connecting the rear bottom plate 1, the rear lower plate 2, and the rear lower plate reinforcing plate 3, it is sometimes necessary to operate according to the following procedure: first, weld the rear lower plate reinforcing plate 3 to the rear bottom plate 1, then use bolts to fasten the rear lower plate reinforcing plate 3 to the rear lower plate 2, and then weld the lower end 21 of the rear lower plate 2 to the flange 13 of the rear bottom plate 1.

[0035] In detail, Figure 3 is an exploded perspective view showing the rear lower panel reinforcement plate 3 and its surrounding structure. As shown by arrow I in Figure 3, the lower side flange 32 of the rear lower panel reinforcement plate 3 is first welded to the upper surface 12 of the raised portion 11 of the rear bottom plate 1; then, as shown by arrow II in Figure 3, the upper side flange 33 of the rear lower panel reinforcement plate 3 is fastened to the rear lower panel 2 with bolts (by screwing bolts B into the bolt insertion holes 33a formed on each upper side flange 33, thus fastening it to the rear lower panel 2); then, the lower end 21 of the rear lower panel 2 is welded to the flange 13 of the rear bottom plate 1.

[0036] As mentioned earlier, in the prior art rear body structure shown in Figure 5, when performing the above operation, because there is an area covered by the rear lower panel reinforcement plate g where the flange d of the rear floor plate a overlaps with the lower end f of the rear lower panel e, the welding gun cannot be inserted, resulting in the inability to spot weld in this area, thus limiting the improvement of body strength.

[0037] In this embodiment, an opening 34 is formed on the main body 31 of the rear lower panel reinforcement plate 3, and this opening 34 is positioned directly opposite the portion where the flange 13 of the rear floor plate 1 overlaps with the lower end 21 of the rear lower panel 2, located behind the main body 31. Therefore, as shown in FIG4 (a cross-sectional view along line IV-IV in FIG2), a welding gun on one side (the welding gun on the front side of the vehicle body) G can be inserted through the opening 34 to the rear of the reinforcement plate main body 31 for welding. This allows welding (spot welding) to be performed on the portion where the flange 13 of the rear floor plate 1 overlaps with the lower end 21 of the rear lower panel 2, without obstruction from the rear lower panel reinforcement plate 3. The weld point W' shown in FIG2 is the welded joint achieved using the opening 34. In this way, a welded joint can be achieved in an area where welding was previously impossible, thereby increasing the number of weld points between the rear floor plate 1 and the rear lower panel 2 and improving the vehicle body strength.

[0038] However, this utility model is not limited to the above-described embodiments and appropriate modifications can be made.

[0039] For example, in the above embodiment, the lower rear panel 2 and the lower rear panel reinforcing plate 3 are fastened together by bolts, but they can also be connected by welding.

[0040] Furthermore, in the above embodiment, a raised portion 11 is formed on the rear bottom plate 1, and the lower side flange 32 of the rear lower plate reinforcing plate 3 is welded to the raised portion 11. However, the present invention is not limited to this, and the raised portion 11 may not be formed on the rear bottom plate 1, but the lower side flange 32 of the rear lower plate reinforcing plate 3 may be directly welded to the rear bottom plate 1.

Claims

1. A rear structure of a vehicle body, comprising a rear floor plate, a rear lower panel plate, and a rear lower panel reinforcing plate spanning the rear floor plate and the rear lower panel plate, wherein a flange formed on the rear end of the rear floor plate overlaps with the rear lower panel plate and is joined by welding, characterized in that: The rear lower panel reinforcement plate has a reinforcement plate body that extends obliquely upward from the rear bottom plate to the rear lower panel, and side flanges formed on two side ends of the reinforcement plate body in the vehicle width direction. The side flange includes a lower side flange that is welded to the rear bottom plate and an upper side flange that is connected to the lower rear panel. An opening is formed on the main body of the reinforcing plate, and the opening is located directly opposite the portion of the rear bottom plate flange that overlaps with the lower rear panel, which is located behind the main body of the reinforcing plate.

2. The vehicle body rear structure as described in claim 1, characterized in that: On the left and right ends of the rear floor plate in the vehicle width direction, there are raised portions that bulge upwards. The rear lower panel reinforcement plate spans the raised portion of the rear bottom plate and the rear lower panel.

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