JP2018171938A - Vehicle body rear structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body rear structure capable of increasing the rigidity between an absorber mounting portion and a side member of a wheel house inner panel and reducing deformation of the vehicle body due to a load received from a rear shock absorber. SOLUTION: A vehicle body rear structure 100 extends from above a side member 112 arranged along a side end of a rear floor panel and a wheel house inner panel 110, is joined to the inside of the vehicle of the wheel house inner panel, and extends to the side member. The wheelhouse inner panel comprises an absorber reinforcement 114 joined to a side member and an absorber mounting portion 126 located above the absorber force to which the rear shock absorber 130 is mounted, and the wheelhouse inner panel is provided at the front and rear of the absorber force. Includes front panel 132 and rear panel 134, respectively, which are joined to each other, and panel connecting portion 136 which connects the front panel and the rear panel between the absorber mounting portion and the side member. [Selection diagram] Fig. 2

Description

  The present invention relates to a vehicle body rear structure.

  A wheel house for accommodating a rear wheel of the vehicle is formed at the rear part of a vehicle body such as an automobile. The wheel house is formed by a wheel house outer panel and a wheel house inner panel that cover the rear wheels of the vehicle from the vehicle outer side and the vehicle inner side, respectively.

  On the upper part of the wheel house inner panel, for example, an absorber mounting portion to which a rear shock absorber is mounted is provided, and thereby the rear shock absorber is supported. The lower part of the wheel house inner panel is joined to the side member. The side members are arranged along the side edges of the rear floor panel that forms the floor surface at the rear of the vehicle body, and extend in the vehicle front-rear direction. For this reason, the wheel house inner panel is indirectly connected to the rear floor panel by being joined to the side member.

  In such a vehicle body rear structure, when a load is received from the rear shock absorber, there is a possibility that stress concentrates in the vicinity of the joint portion between the wheel house inner panel and the rear floor panel and a crack occurs. For this reason, it is necessary to ensure rigidity in the vehicle body rear structure in which the absorber mounting portion is provided on the upper portion of the wheel house inner panel.

  Patent Document 1 describes a rear vehicle body structure in which a rear wheel house is provided with a damper support portion that supports an upper end portion of a suspension damper. In this rear vehicle body structure, a first brace, a second brace, and an outer surface side reinforcing material are provided on the vehicle front side, the vehicle rear side, and the upper part of the rear wheel house, respectively.

  The first brace and the second brace hang downward from the vicinity of the damper support portion at the vehicle front side position and the vehicle rear side of the rear wheel house, respectively. The lower portions of the first brace and the second brace are fixed to the rear side frame. The outer surface side reinforcing member is connected to the rear wheel house and the roof side rail at the upper part of the rear wheel house located between the first brace and the second brace.

  In Patent Document 1, the first brace and the second brace receive the load input from the suspension damper, and the load is transmitted to the roof side rail by the connecting member, so that the rigidity of the rear part of the vehicle body can be improved. Yes.

JP 2012-6507 A

  However, in the vehicle body rear part structure described in Patent Document 1, the rigidity is only increased as a whole by providing a plurality of braces and reinforcing members as separate members on the wheel house inner panel. That is, in the wheel house inner panel, between the absorber mounting part and the side member, only two braces are joined before and after the absorber mounting part, and the rigidity between the two braces is sufficient. Not secured.

  In view of such a problem, the present invention provides a vehicle body rear structure that can increase the rigidity between the absorber mounting portion and the side member in the wheel house inner panel and reduce the deformation of the vehicle body due to the load received from the rear shock absorber. It is intended to provide.

  In order to solve the above problems, a typical structure of a vehicle body rear structure according to the present invention includes a wheel house outer panel that forms a wheel house that covers a rear wheel of a vehicle from the vehicle outer side and the vehicle inner side to accommodate the rear wheel, and A vehicle body rear structure including a wheel house inner panel, a side member disposed along a side edge of a rear floor panel forming a floor surface of the vehicle body rear portion and extending in the front-rear direction, and a wheel house extending from above the wheel house inner panel Further provided is an absorber force that is joined to the inner side of the inner panel, further extends to the side member and joined to the side member, and an absorber mounting portion that is disposed on the absorber link force and to which the rear shock absorber is attached. Wheelhouse inner panel, absorber force And a front panel and rear panel are joined respectively to the front and rear, characterized in that it comprises a panel connecting portion for connecting the front panel and a rear panel between the absorber mounting portion and the side members.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle body rear part structure which can raise the rigidity between the absorber attachment part in a wheel house inner panel and a side member, and can reduce the deformation | transformation of the vehicle body resulting from the load received from a rear shock absorber can be provided. .

1 is a diagram schematically illustrating a vehicle to which a vehicle body rear structure according to an embodiment of the present invention is applied. It is a figure which shows the internal structure of the vehicle body rear part structure shown to the area | region A of FIG. It is BB sectional drawing of the vehicle body rear part structure of FIG. It is CC sectional drawing of the vehicle body rear part structure of FIG.

  A representative configuration of a vehicle body rear structure according to an embodiment of the present invention includes a wheel house outer panel and a wheel house inner that form a wheel house that covers a rear wheel of the vehicle from the vehicle outer side and the vehicle inner side to accommodate the rear wheel. A vehicle body rear structure having a panel, a side member disposed along a side edge of a rear floor panel forming a floor surface of the vehicle body rear portion and extending in the front-rear direction, and extending from above the wheel house inner panel, The wheel house inner is further provided with an absorber reinforcement that is joined to the inside of the vehicle and extends to the side member and joined to the side member, and an absorber mounting portion that is disposed on the upper part of the absorber reinforcement and to which the rear shock absorber is attached. Panels are located at the front and rear of the absorber force Characterized in that it comprises a front panel and rear panel are joined respectively, and a panel connecting portion for connecting the front panel and a rear panel between the absorber mounting portion and the side members to.

  According to the said structure, the absorber attaching part and the side member are directly connected by the absorber reinforcement. Moreover, since the absorber reinforcement and the panel connection portion are overlapped with each other, the plate thickness is increased at a position where the panel connection portion is located between the absorber mounting portion and the side member. Therefore, the rigidity between the absorber mounting portion and the side member is increased, and the deformation of the vehicle body due to the load received from the rear shock absorber can be reduced. Furthermore, since the absorber force extends to the side member and is connected thereto, the load can be distributed to the highly rigid side member. Therefore, deformation due to stress concentration around the absorber force can be prevented.

  The rear end of the front panel and the front end of the rear panel are each formed with a first bulge that bulges outward in the vehicle vertical direction, and the first bulge, together with the absorber reinforcement The first closed section is formed, and the panel connecting portion is formed with a second bulging portion that bulges to the vehicle outer side in the vehicle longitudinal direction, and the second bulging portion is the second along with the absorber reinforcement. The closed cross section is formed, and the first closed cross section and the second closed cross section are preferably continuous.

  Thus, a first bulge is formed in the vehicle up-down direction at the rear end of the front panel, that is, the front side of the absorber mounting portion, and further, the first bulge is formed in the vehicle up-down direction at the front end of the rear panel, ie, the rear side of the absorber mounting portion. A protruding portion is formed. Further, a second bulging portion is formed in the vehicle front-rear direction below the panel connecting portion, that is, the absorber mounting portion. And since the 1st closed section which two 1st bulge parts each form and the 2nd closed section which one 2nd bulge part forms are continuous, it is H shape as a whole in side view, A closed cross-sectional structure can be formed. Therefore, the rigidity between the absorber mounting portion and the side member can be further increased, and deformation of the absorber mounting portion can be reduced. Furthermore, the closed cross-section structure which becomes an H shape is formed by overlapping the absorber reinforcement from the vehicle inner side on the rear end of the front panel, the front end of the rear panel, and the panel connecting portion. Therefore, since rigidity can be improved without adding another reinforcing member, the space of the vehicle interior or the wheel house does not have to be narrowed.

  Said front panel, rear panel, and panel connection part are good to be integrally molded. Thereby, the wheel house inner panel including the front panel, the rear panel, and the panel connecting portion becomes an integrally molded product. For this reason, when forming a wheel house inner panel, addition and division of each component composition become unnecessary, and also other members, such as a bracket for assembling the divided components, become unnecessary. Therefore, increase in production cost and man-hour can be suppressed and productivity can be improved.

  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 examples 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 schematically shows a vehicle 102 to which a vehicle body rear structure 100 according to an embodiment of the present invention is applied. In the following, arrows X and Y shown in the drawings indicate the vehicle front side and the vehicle outer side, respectively. The vehicle body rear structure 100 is formed with a wheel house 106 that houses a rear wheel 104 of the vehicle shown in a region A of FIG.

  The wheel house 106 shown in FIG. 1 is formed of a wheel house outer panel 108 (see FIG. 3) that covers the rear wheel 104 from the outside of the vehicle and a wheel house inner panel 110 (see FIG. 3) that covers the rear wheel 104 from the inside of the vehicle. ing. In FIG. 3, the rear wheel 104 is not shown.

  FIG. 2 is a diagram showing an internal structure of the vehicle body rear structure 100 shown in the region A of FIG. The figure shows the internal structure of the vehicle body rear structure 100 as viewed from the outside of the vehicle. The vehicle body rear structure 100 further includes a side member 112 and an absorber reinforcement 114. The side member 112 is a highly rigid member located below the wheel house inner panel 110, and is disposed along the side edge of the rear floor panel 116 shown in FIG. ing.

  As shown in FIG. 2, the absorber force 114 is a member that is joined to the vehicle interior side of the wheel house inner panel 110 and reinforces the wheel house inner panel 110. The absorber force 114 extends from above the wheel house inner panel 110 toward the side member 112. Here, in FIG. 2, the outline of the absorber force 114 before and after the vehicle is schematically indicated by dotted lines D and E.

  3 is a BB cross-sectional view of the vehicle body rear structure 100 of FIG. The lower part 118 of the absorber force 114 is joined to the side member 112 as shown in FIG. Thereby, the absorber force 114 is indirectly connected to the rear floor panel 116. The upper end 120 of the absorber force 114 is joined to the upper end 122 of the wheel house outer panel 108.

  As shown in FIG. 3, a mounting panel 128 in which an absorber mounting portion 126 is formed is disposed on the upper portion 124 of the absorber reinforcement 114. A rear shock absorber 130 indicated by a chain line in FIG. 2 is attached to the absorber attachment portion 126. For this reason, the absorber mounting portion 126 receives a load from the rear shock absorber 130 during traveling or the like.

  Therefore, in this embodiment, a configuration is adopted in which the rigidity between the absorber mounting portion 126 and the side member 112 is increased and the deformation of the vehicle body due to the load received from the rear cushion absorber 130 is reduced. As shown in FIG. 3, in the vehicle body rear structure 100, the absorber mounting portion 126 and the side member 112 are directly connected by the absorber reinforcement 114, and the rigidity is enhanced by the shape of the wheel house inner panel 110 described later. .

  As shown in FIG. 2, the wheel house inner panel 110 includes a front panel 132, a rear panel 134, and a panel connecting portion 136 that are integrally formed. The front panel 132 and the rear panel 134 are joined to the front part and the rear part of the absorber force 114, respectively.

  The panel connecting portion 136 in FIG. 2 connects the front panel 132 and the rear panel 134 between the absorber mounting portion 126 and the side member 112. For this reason, in the location where the panel connection part 136 is located between the absorber mounting part 126 and the side member 112, the absorber reinforcement 114 and the panel connection part 136 are overlapped, and the plate thickness is increased.

  At the rear end 138 of the front panel 132, as shown in FIG. 2, a first bulging portion 140 that bulges outward in the vehicle vertical direction is formed. The front end 142 of the rear panel 134 is formed with a first bulge portion 144 that bulges outward in the vehicle vertical direction. The panel connecting portion 136 is formed with a second bulging portion 146 that bulges outward in the vehicle longitudinal direction. In FIG. 2, the first bulging portions 140 and 144 and the second bulging portion 146 are hatched. Thus, in the wheel house inner panel 110, the first bulging portions 140 and 144 and the second bulging portion 146 are formed on the front side, the rear side, and the lower side of the absorber mounting portion 126, respectively.

  4 is a cross-sectional view taken along the line C-C of the vehicle body rear structure 100 of FIG. As shown in FIG. 4, the first bulging portions 140 and 144 and the second bulging portion 146 form first closed sections 148 and 150 and a second closed section 152 together with the absorber reinforcement 114. Further, as shown in FIG. 4, the first closed cross sections 148 and 150 are located before and after the second closed cross section 152 and are continuous with the second closed cross section 152.

  Therefore, as shown in FIG. 2, the wheel house inner panel 110 forms a closed cross-sectional structure that is H-shaped as a whole in a side view by the continuous first closed cross-sections 148 and 150 and the second closed cross-section 152. .

  As shown in FIG. 3, the absorber mounting portion 126 and the side member 112 are directly connected by an absorber reinforcement 114. Further, the portion where the panel connecting portion 136 is located between the absorber mounting portion 126 and the side member 112 is thicker because the absorber reinforcement 114 and the panel connecting portion 136 are overlapped as shown in FIG. ing. Therefore, the rigidity between the absorber mounting portion 126 and the side member 112 is increased, and the deformation of the vehicle body due to the load received from the rear shock absorber 130 can be reduced.

  Further, as shown in FIG. 3, since the absorber force 114 is connected to the side member 112, the load can be distributed to the highly rigid side member 112, which is caused by stress concentration around the absorber force 114. Deformation can be prevented.

  Further, as shown in FIG. 4, in the wheel house inner panel 110, the first bulging portions 140 and 144 and the second bulging portion 146 are formed on the front side, the rear side, and the lower side of the absorber mounting portion 126. For this reason, the rigidity between the absorber mounting portion 126 and the side member 112 can be further increased, and deformation of the absorber mounting portion 126 can be reduced.

  Further, the wheel house inner panel 110 has a continuous closed cross-sectional structure composed of first closed cross-sections 148 and 150 and a second closed cross-section 152 (FIG. 4) that are H-shaped in a side view of FIG. It is formed together with the reinforcement 114. As described above, since the rigidity can be increased without adding another reinforcing member, the space of the vehicle interior or the wheel house 106 does not have to be narrowed.

  The wheel house inner panel 110 shown in FIG. 2 is a molded product in which the front panel 132, the rear panel 134, and the panel connecting portion 136 are integrally molded. For this reason, when the wheel house inner panel 110 is formed, it is not necessary to add or divide each component configuration, and other members such as a bracket for assembling the divided components are also unnecessary. Therefore, increase in production cost and man-hour can be suppressed and productivity can be improved.

  Although not shown, the wheel house inner panel 110 may be formed by separately forming the front panel 132, the rear panel 134, and the panel connecting portion 136 and then assembling them. Even in such a case, the absorber mounting portion 126 and the side member 112 are directly connected by the absorber reinforcement 114, and the panel connecting portion 136 is further stacked to increase the plate thickness. Can be increased.

  As mentioned above, although the suitable Example of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this example. 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.

DESCRIPTION OF SYMBOLS 100 ... Vehicle body rear structure, 102 ... Vehicle, 104 ... Rear wheel, 106 ... Wheel house, 108 ... Wheel house outer panel, 110 ... Wheel house inner panel, 112 ... Side member, 114 ... Absorber reinforcement, 116 ... Rear floor panel, 118 ... lower part of the absorber force, 120 ... upper end of the absorber force, 122 ... upper end of the wheel house outer panel, 124 ... upper part of the absorber force, 126 ... absorber mounting part, 128 ... mounting panel, 130 ... rear shock absorber, 132 ... Front panel, 134 ... rear panel, 136 ... panel connecting portion, 138 ... rear end of front panel, 140, 144 ... first bulge portion, 142 ... front end of rear panel, 146 ... second bulge portion, 148 150 ... first closed cross section, 152 ... second closed section

Claims (3)

A vehicle body rear structure including a wheel house outer panel and a wheel house inner panel for covering a rear wheel of the vehicle from the vehicle outer side and the vehicle inner side to form a wheel house for accommodating the rear wheel,
A side member arranged along the side edge of the rear floor panel forming the floor surface of the rear of the vehicle body and extending in the front-rear direction;
An absorber reinforcement that extends from above the wheel house inner panel and is joined to the vehicle interior of the wheel house inner panel, and further extends to the side member and joined to the side member;
An absorber mounting portion that is disposed on an upper portion of the absorber reinforcement and to which a rear shock absorber is mounted;
The wheel house inner panel is
A front panel and a rear panel respectively joined to a front part and a rear part of the absorber reinforcement;
A vehicle body rear part structure including a panel connecting part for connecting the front panel and the rear panel between the absorber mounting part and the side member. The rear end of the front panel and the front end of the rear panel are each formed with a first bulge that bulges outward in the vehicle up-down direction. Forming the first closed section with the force,
The panel connecting portion is formed with a second bulging portion that bulges outward in the vehicle front-rear direction, and the second bulging portion forms a second closed section together with the absorber reinforcement. ,
The vehicle body rear structure according to claim 1, wherein the first closed cross section and the second closed cross section are continuous.   The vehicle body rear part structure according to claim 1 or 2, wherein the front panel, the rear panel, and the panel connecting part are integrally formed.

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