JP2016117321A - Vehicle body rear part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body rear part structure capable of enhancing rigidity of a weak portion without increasing a weight.SOLUTION: A vehicle body rear part structure 100 includes a wheel house inner panel 102, a rear shock absorber reinforcement 104, a rear shock absorber reinforce upper panel 106, and a bracket 108 for connecting the wheel house inner panel 102 and the rear shock absorber reinforce upper panel 106. A closed cross section S, which includes the bracket 108 and a portion 156 of the rear shock absorber reinforcement 104 not overlapping with the wheel house inner panel 102 and the rear shock absorber reinforce upper panel 106, is formed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle body rear portion structure including a wheel house inner panel that covers a rear wheel of a vehicle.

  A rear shock absorber reinforcement as a reinforcing material is continuously provided in the rear wheel house of the vehicle. A suspension device (rear shock absorber) that absorbs the impact of the rear wheel is attached to the rear shock absorber reinforcement. Therefore, in order to withstand the input load from the suspension device and to obtain high steering stability, a part to which the rear shock absorber reinforcement, especially the rear shock absorber is attached (this is referred to as an “input surface” in the present application). ) Requires high rigidity.

  For example, Patent Document 1 discloses that the rigidity of the first absorber connecting surface 24 (corresponding to the rear shock absorber reinforcement in the present application) to which the upper end portion of the suspension device is connected is improved. More specifically, the plate 30 (corresponding to the rear shock absorber reinforcement upper in the present application) is provided around the through hole 24h through which the bolt of the suspension device is inserted in the first absorber connecting surface 24 (corresponding to the input surface in the present application). ), The rigidity of the first absorber connecting surface 24 is improved.

JP 2009-166801 A

  As described above, the input surface connected to the rear shock absorber and receiving the greatest force is further reinforced by the rear shock absorber reinforcement upper. However, if the force transmitted from the input surface to the rear shock absorber force is directly transmitted to the wheel house inner panel, the wheel house inner panel may be deformed. Therefore, the input surface is formed at a position in the rear shock absorber reinforcement that is spaced from the connection portion with the wheel house inner panel. Therefore, the rear shock absorber reinforcement has a portion that does not overlap with either the rear shock absorber upper or the wheel house inner panel. However, since this part is only a single panel, it is vulnerable. Therefore, when the force transmitted from the input surface to the rear shock absorber force is applied to the part, there is a problem that the part may be deformed.

  In order to prevent such deformation, it is conceivable to reinforce the above-mentioned part by extending the rear shock absorber reinforcement upper, or to increase the thickness of the wheel house inner panel or the rear shock absorber reinforcement. However, the input surface is not parallel to the above-described portion of the rear shock absorber reinforcement because of receiving a force from the rear shock absorber. Therefore, even if the rear shock absorber reinforcement upper is extended to reinforce the above part, the panel must be processed into a more complicated shape. Further, increasing the thickness of the wheel house inner panel and the rear shock absorber reinforcement will increase the weight.

  In view of such a problem, an object of the present invention is to provide a vehicle body rear structure that can increase the rigidity of a fragile portion without causing an increase in weight.

  In order to solve the above problems, a typical configuration of a vehicle body rear structure according to the present invention is a vehicle body rear structure including a wheel house inner panel that covers a rear wheel of the vehicle. The vehicle body rear structure further includes a wheel house inner panel. A rear shock absorber reinforcement connected to the rear end of the rear shock absorber forming an input surface that receives a force from the rear shock absorber at a position away from the wheel house inner panel, and an input surface It includes a rear shock absorber reinforcement upper panel that overlaps and reinforces it, and a bracket that connects the wheel house inner panel and the rear shock absorber force upper panel. The bracket and the wheel house interior of the rear shock absorber reinforcement are included. Wherein the closed cross section and a portion not overlapping with any of Napaneru and rear shock absorbers reinforcement upper panel is formed.

  According to said structure, since it does not overlap on either, the said part which is weak compared with a peripheral member forms a closed cross section with a bracket. Thereby, the said part is reinforced, the rigidity increases, and it can prevent that the said part deform | transforming. As a result, it is not necessary to increase the thickness of the wheel house inner panel or the rear shock absorber reinforcement, thereby preventing an increase in weight.

  The bracket may have a through hole for fixing an interior member of the passenger compartment. Thereby, it becomes possible for the bracket to serve not only the function of reinforcing the part but also the function of fixing the interior member of the passenger compartment. Therefore, it is possible to improve the rigidity of the rear structure of the vehicle body by preventing deformation of the above part without increasing the number of parts.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle body rear part structure which can raise the rigidity of a weak part, without causing the increase in a weight can be provided.

It is a perspective view of the vehicle body rear part structure in this embodiment. It is an enlarged view of the bracket in FIG. It is AA sectional drawing of FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a perspective view of a vehicle body rear structure 100 according to an embodiment of the present invention. In the figure, arrows F and R indicate the vehicle front and the vehicle rear, respectively. As illustrated in FIG. 1, the vehicle body rear structure 100 includes a wheel house inner panel 102, a rear shock absorber reinforcement 104, a rear shock absorber upper panel 106, and a bracket 108.

  The wheel house inner panel 102 is a panel that extends in the vehicle front-rear direction and covers the rear wheel of the vehicle. The wheel house inner panel 102 has an upwardly projecting arch shape and surrounds the upper side of the rear wheel. A rear shock absorber reinforcement 104 is connected to the rear end of the wheel house inner panel 102. The rear shock absorber reinforcement 104 is joined so as to overlap an end of the wheel house inner panel 102 on the vehicle rear side. The upper ends of the wheel house inner panel 102 and the rear shock absorber reinforcement 104 are respectively connected to a rear quarter inner panel 110 that constitutes a side portion on the rear side of the vehicle.

  As illustrated in FIG. 1, the rear shock absorber reinforcement 104 has an input surface (seat surface) 112 at a position away from the wheel house inner panel 102. In FIG. 1, since the rear shock absorber upper panel 106 overlaps the input surface 112, the input surface 112 is not visible and is therefore indicated by a broken line. The input surface 112 is formed with an opening 114 through which a bolt (not shown) of a shock absorber is inserted, which also penetrates a rear shock absorber reinforcement upper panel 106 described later.

  The rear shock absorber upper panel 106 is a panel that overlaps and reinforces the input surface 112. In the present embodiment, the rear shock absorber force upper panel 106 is slightly larger than the input surface 112 and is joined to the input surface 112 so as to cover the entire input surface 112. Accordingly, the rear shock absorber force upper panel 106 includes a seat surface portion 120 that overlaps the input surface 112, and a peripheral portion 122 that is continuous with the seat surface portion 120 and overlaps the rear shock absorber force upper panel 106 around the input surface 112. And have.

  FIG. 2 is an enlarged view of the bracket 108 of FIG. 3 is a cross-sectional view taken along the line AA in FIG. The bracket 108 will be described in detail with reference to FIGS. 2 and 3.

  As shown in FIG. 2, the bracket 108 is a member that connects the wheel house inner panel 102 and the rear shock absorber reinforcement upper panel 106, and is formed by press molding a single metal plate. The bracket 108 includes a first joint 130 joined to the wheel house inner panel 102, a second joint 132 joined to the rear shock absorber force upper panel 106, and a first joint 130 and a second joint 132. And an intermediate portion 134 located between the two. A raised bead 136 is formed between the first joint portion 130 and the intermediate portion 134, thereby increasing the rigidity of the bracket 108.

  As shown in FIG. 3, in the first joint 130, the three members of the first joint 130 (the bracket 108), the wheel house inner panel 102, and the rear shock absorber reinforcement 104 are joined by welding. ing.

  Further, in the second joint portion 132, the three members of the second joint portion 132 (bracket 108), the rear shock absorber force upper panel 106, and the rear shock absorber force member 104 are joined by welding.

  As shown in FIG. 2, the intermediate part 134 is a part that is continuous with the first joint part 130 and the second joint part 132, and is a part that faces and covers the rear shock absorber reinforcement 104. . In the present embodiment, the intermediate portion 134 is bent in a U-shape on the side opposite to the rear shock absorber reinforcement 104, that is, on the cabin side, and is continuous with the two side surfaces 140 and 142. And a top surface 144. The top surface 144 has two through holes 146 and 148 for fixing the interior member of the passenger compartment, and thereby the interior member of the passenger compartment, such as a trim (not shown), is fixed to the bracket 108. Therefore, the bracket 108 can also serve as a function of fixing the interior member of the passenger compartment.

  The upper end of the intermediate portion 134 is bent toward the rear shock absorber reinforcement 104 to form a flange 150. The flange 150 is provided to prevent the U-shaped intermediate portion 134 from being crushed and to prevent the edge from jumping out toward the passenger compartment.

  Thus, in this embodiment, the bracket 108 is disposed between the wheel house inner panel 102 and the rear shock absorber upper panel 106. Therefore, as illustrated in FIG. 3, the rear shock absorber reinforcement 104 has a portion 156 that does not overlap any of the wheel house inner panel 102 and the rear shock absorber upper panel 106. A feature of the present embodiment is that a closed section S including the portion 156 and the bracket 108 is formed.

  A space existing between the rear shock absorber reinforcement 104 and the bracket 108 from the upper end (flange 150) to the lower end 152 of the bracket 108 in FIG. That is, as shown in FIG. 3, the wheel house inner panel 102 and the rear shock absorber force upper panel 106 are connected not only by the rear shock absorber force 104 but also by the bracket 108. Accordingly, it is possible to distribute the force transmitted from the shock absorber (not shown), which is exemplified by the arrow F, to the rear shock absorber reinforcement upper panel 106 to the rear shock absorber force 104 and the bracket 108.

  As described above, according to the present embodiment, originally, the panel is only a single panel, and the fragile portion 156 is reinforced even when compared with the peripheral member, the rigidity is improved, and the crack is cracked or crushed. Is prevented. In addition, according to the present embodiment, it is not necessary to increase the thickness of the wheel house inner panel 102 or the rear shock absorber reinforcement 104 in order to reinforce the portion 156, which contributes to avoiding an increase in the weight of the vehicle. it can.

  Furthermore, in this embodiment, the bracket 108 also has a function of fixing the interior member of the passenger compartment, so that a member dedicated to reinforcement is not added when the portion 156 is reinforced. Therefore, it is possible to improve the rigidity of the vehicle body rear structure 100 by preventing the deformation of the portion 156 without increasing the number of parts.

  The shape of the closed cross section S, that is, the shape of the intermediate portion 134 and the portion 156 of the bracket 108 can be any shape. For example, in the present embodiment, as illustrated in FIG. 3, the portion 156 is curved so as to have an S shape with a gentle cross section, and includes a first curved portion 160 and a second curved portion 162. ing. In this case, the first bending portion 160 close to the input surface 112 is likely to receive a force from a shock absorber (not shown). Therefore, it is preferable that the bracket 108 has a shape that can reinforce the first bending portion 160. Specifically, when the bracket 108 is U-shaped in cross section as in the present embodiment, the position between the side surface 142 and the top surface 144 of the bracket 108 is at a position corresponding to the first bending portion 160. The bracket 108 may be formed so that the side 164 of the bracket is located.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  The present invention can be used for a vehicle body rear structure including a wheel house inner panel that covers a rear wheel of a vehicle.

DESCRIPTION OF SYMBOLS 100 ... Car body rear structure, 102 ... Wheel house inner panel, 104 ... Rear shock absorber reinforcement, 106 ... Rear shock absorber upper panel, 108 ... Bracket, 110 ... Rear quarter inner panel, 112 ... Input surface, 114 ... Opening, 120 ... Seat surface part, 122 ... Peripheral part, 130 ... First joint part, 132 ... Second joint part, 134 ... Intermediate part, 136 ... Bead, 140, 142 ... Side face, 144 ... Top face, 146, 148 ... through hole, 150 ... flange, 152 ... lower end of bracket, 156 ... part, 160 ... first curved portion, 162 ... second curved portion, 164 ... side between side surface 142 and top surface 144, S ... closed cross section

Claims (2)

In the vehicle body rear structure including the wheel house inner panel that covers the rear wheel of the vehicle, the vehicle body rear structure further includes:
A rear shock absorber reinforcement connected to a rear end of the wheel house inner panel, the rear shock absorber force forming an input surface that receives a force from the rear shock absorber at a position away from the wheel house inner panel And
A rear shock absorber force upper panel that overlaps and reinforces the input surface;
A bracket connecting the wheel house inner panel and the rear shock absorber force upper panel;
A vehicle body having a closed cross section including the bracket and a portion of the rear shock absorber reinforcement that does not overlap any of the wheel house inner panel and the rear shock absorber upper panel. Rear structure.   The vehicle body rear structure according to claim 1, wherein the bracket has a through-hole for fixing an interior member of the passenger compartment.

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