JP2007091056A - Vehicle body rear structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle body rear structure capable of making a dent in the side wall of a wheel house in a vehicle body width outward direction to expand a compartment room space across a pair of right and left wheel houses, reinforcing the wheel houses and preventing a filler pipe as much as possible when the rear wall part of each of the wheel houses is moved forward at the time of rear collision of a vehicle in the case that a rear side frame is deformed in compression. <P>SOLUTION: A damper 10 is arranged in a slant attitude to extend rearward as it approaches upward, a filler pipe 11 is arranged in a rear wheel house 6 to face in an upward or downward direction at the rear side of the damper 10, the rear wall segment in an area where both the damper 10 in the rear wheel house 6 and the filler pipe 11 are overlapped to each other in a vehicle width direction and a rear side frame 2 are connected from each other, and there is provided a reinforcing member 20 extending up to a location near a damper fixing part 6f of the rear wheel house 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle body rear structure including a damper attached to an upper wall portion of a wheel house and a filler pipe disposed inside the wheel house.

  Conventionally, in a vehicle body rear structure including a damper and a filler pipe attached to an upper wall portion of a wheel house, Patent Document 1 discloses that a filler pipe is disposed on the front side of a damper inside a rear wheel house. A pair of rear side frames are connected by a rear cross member extending in the vehicle width direction, a filler pipe is arranged on the front side of the rear cross member, and a middle part of the filler pipe is connected to a rear side frame on the front side of the rear cross member by a bracket. A supported structure is disclosed.

In the rear structure of the vehicle body as in Patent Document 1, the cabin space between the pair of left and right rear wheel houses is small. For example, in a car equipped with the first to third row seats, the third row seat is a pair of left and right rows. When arranged between the rear wheel houses, the width in the left-right direction of the third row seat is reduced. Therefore, the side wall portions of the pair of left and right rear wheel houses can be recessed outward in the vehicle width direction to enlarge the vehicle interior space between these rear wheel houses.
JP 2005-29000 A

  When the side wall of the rear wheel house is recessed outward in the vehicle width direction in order to expand the cabin space between the pair of left and right rear wheel houses, the rear wheel house and the damper and filler pipe do not interfere with each other. However, in the conventional rear structure of the vehicle body including the technique of Patent Document 1, it is difficult to largely dent the side wall portion of the rear wheel house outward in the vehicle width direction. In order to achieve this, the applicant of the present invention has provided the inside of the rear wheel house in an inclined manner so that the damper moves backward as it moves upward, and the damper is provided in the vertical direction on the rear side of the filler pipe. The structure is being put into practical use.

  However, in the above structure, the damper and the filler pipe are close to each other at the rear end portion inside the rear wheel house, so that the collision load is input to the rear wall portion of the rear wheel house at the time of the rear collision of the vehicle. When the rear wheel house is crushed and the rear wall portion moves forward, the filler pipe may be pinched between the rear wall portion and the damper and may be damaged.

  In addition, when a collision load is input to the rear side frame and the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, it is assumed that the rear side frame moves relatively forward with respect to the filler pipe. As in Patent Document 1, when the filler pipe is simply connected to the rear side frame, there is a problem that an excessive force acts on the filler pipe and the filler pipe is easily damaged.

  An object of the present invention is to enlarge a vehicle compartment space between a pair of left and right wheel houses by denting the side wall portion of the wheel house outward in the vehicle width direction to reinforce the wheel house. It is an object of the present invention to provide a vehicle body rear portion structure that can prevent damage to a filler pipe as much as possible when a rear wall portion moves forward and when a rear side frame is further compressed and deformed.

  The vehicle body rear structure according to claim 1 is a vehicle body rear structure including a damper attached to an upper wall portion of the wheel house and a filler pipe disposed inside the wheel house. The damper moves rearward as it moves upward. In the wheel house, the filler pipe is provided in the vertical direction on the rear side of the damper, and the damper and the filler pipe in the wheel house overlap in the vehicle width direction. The rear wall portion of the area and the rear side frame are connected to each other, and a reinforcing member extending to the vicinity of the damper mounting portion of the wheel house is provided.

  In this vehicle body rear structure, the damper is attached to the upper wall portion of the wheel house, and inside the wheel house, the damper is provided in an inclined shape so as to move backward as it moves upward, and the filler pipe is located on the rear side of the damper. Are provided in the vertical direction. Therefore, a damper and a filler pipe are arranged close to the rear end portion inside the wheel house, the side wall of the wheel house is recessed outward in the vehicle width direction, and a vehicle room space between the pair of left and right wheel houses is formed. Can be enlarged.

  The rear wall portion of the wheel house where the damper and filler pipe overlap in the vehicle width direction and the rear side frame are connected by the reinforcing member, so that the rear wall portion of the wheel house is reinforced, When a collision load is input to the rear wall portion of the wheel house, the wheel house is crushed and the rear wall portion is less likely to move forward, and the reinforcing member extends to the vicinity of the damper mounting portion of the wheel house. Therefore, even when the rear wall part of the wheel house moves forward, the upper end part of the damper is moved forward together with the damper mounting part to raise the damper, and there is a space between the damper and the rear wall part of the wheel house. Retained.

The following configuration can be adopted in the invention of claim 1.
In order to expand a vehicle compartment space between the pair of left and right wheel houses, a vehicle compartment extension portion is formed in which the side wall portion of the wheel house is recessed outward in the vehicle width direction. The reinforcing member is provided over the rear wall portion of the wheel house in an arch shape in plan view, the inner surface side of the side wall portion, and the upper surface side of the rear side frame.

  A bracket is provided to support the middle part of the filler pipe to the rear side frame, and when the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, the bracket is attached to the rear side frame so as to be relatively movable in the longitudinal direction of the vehicle body. 4). Two attachment portions at the front and rear of the bracket are attached to the rear side frame, and when the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, the rear attachment portion of the bracket is detached from the rear side frame. .

  According to the vehicle body rear part structure of the first aspect, the damper is attached to the upper wall portion of the wheel house, and the filler pipe is provided inside the wheel house so as to move backward as the damper moves upward. Since it is provided on the rear side in the vertical direction, the damper and filler pipe are placed close to the rear end portion inside the wheel house, and the side wall of the wheel house is recessed outward in the vehicle width direction. The cabin space between the pair of wheel houses can be expanded, and when a seat is arranged between these wheel houses, the width in the left-right direction of the seat can be increased. In addition, the rear wall portion of the region of the wheel house where the damper and the filler pipe overlap in the vehicle width direction is connected to the rear side frame, and a reinforcing member extending to the vicinity of the damper mounting portion of the wheel house is provided. So, the rear wall part of the wheel house can be reinforced, and when a collision load is input to the rear wall part of the wheel house at the time of the rear collision of the vehicle, the wheel house is crushed and the rear wall part is less likely to move forward. Even when the rear wall part of the wheel house moves forward, the damper upper part of the damper is moved forward together with the damper mounting part to raise the damper and maintain the space between the damper and the rear wall part of the wheel house. It is possible to prevent the filler pipe from being sandwiched and damaged by the rear wall portion and the damper as much as possible.

  According to the vehicle body rear portion structure of claim 2, since the vehicle compartment extension portion in which the side wall portion of the wheel house is recessed outward in the vehicle width direction in order to enlarge the vehicle compartment space between the pair of left and right wheel houses, A sheet having a large lateral width can be disposed between the wheel houses. As described above, since the damper and the filler pipe can be disposed close to the rear end side portion inside the wheel house, a vehicle compartment extension part in which the side wall part of the wheel house is greatly recessed can be formed. It is possible to reliably arrange a sheet having a large lateral width between the wheel houses.

  According to the vehicle body rear portion structure of the third aspect, the reinforcing member is provided over the rear wall portion of the wheel house in an arch shape in plan view, the inner surface side of the side wall portion, and the upper surface side of the rear side frame. When the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, the collision load is input from the rear side frame to the vicinity of the damper mounting portion of the wheel house through the reinforcing member, so that the damper is surely raised. It is possible to cope with the forward movement of the rear wall of the wheel house.

  According to the vehicle body rear part structure of the fourth aspect, the bracket for supporting the middle part of the filler pipe on the rear side frame is provided, and when the rear side frame is compressed and deformed at the time of rearward collision of the vehicle, the bracket is disposed in the vehicle body longitudinal direction. Since the bracket is mounted so as to be relatively movable, it is possible to prevent the filler pipe from being damaged due to an excessive force acting on the filler pipe by connecting the filler pipe to the rear side frame by the bracket.

  According to the vehicle body rear part structure of the fifth aspect, when the two attachment parts at the front and rear of the bracket are attached to the rear side frame, and the rear side frame is compressed and deformed at the time of rear collision of the vehicle, the attachment part on the rear side of the bracket is detached from the rear side frame. Because of this simple structure, normally the filler pipe is securely supported by the rear side frame, and if the rear side frame is compressed and deformed during a rear-end collision, an excessive force acts on the filler pipe to It is possible to reliably prevent damage.

  The rear body structure of the present invention includes a damper attached to the upper wall of the wheel house and a filler pipe disposed inside the wheel house, and the damper moves rearward as it moves upward. The filler pipe is provided in the vertical direction on the rear side of the damper inside the wheel house, and the damper and the filler pipe in the wheel house overlap in the vehicle width direction. A reinforcing member is provided that connects the rear wall portion and the rear side frame and extends to the vicinity of the damper mounting portion of the wheel house.

  As shown in FIGS. 1 and 2, the rear body structure 1 of an automobile includes a rear side frame 2 that extends in a pair of left and right vehicle bodies in the longitudinal direction (front and rear direction) and a vehicle width direction (left and right) that connects the pair of rear side frames 2. A rear cross member 3 and an intermediate cross member 4 extending in a direction), a pair of rear side frames 2, a rear cross member 3, a rear floor panel 5 fixed on the intermediate cross member 4, a pair of rear side frames 2 and a rear floor panel. And a pair of left and right rear wheel houses 6 connected to 5.

  Of the rear floor panel 5, a tire pan 5 a for storing a spare tire is formed in the rear portion of the rear cross member 3, and a fuel tank is formed on the lower surface side of the portion between the rear cross member 3 and the intermediate cross member 4. 7 and a rear bumper 8 are attached to the rear ends of the pair of rear side frames 2 via a crash can 8a. The position of the rear cross member 3 in the front-rear direction is approximately the center position of the rear wheel house 6 in the front-rear direction.

  A rear suspension device 9 is provided, and a pair of left and right wheel connecting portions 9a connected to the rear suspension device 9 face the inside of the pair of tire pans 6, and a pair of rear tire wheels ( (Not shown) is attached.

  As shown in FIGS. 1 to 5, the vehicle body rear structure 1 includes a pair of left and right dampers 10 attached to the upper wall portion 6 a of the pair of left and right rear wheel houses 6, and the right rear wheel house 6. A filler pipe 11 disposed along the upper wall portion 6 a and an air vent pipe 12 disposed along the filler pipe 11 are provided. The pair of dampers 10 are arranged symmetrically and are inclined so as to move backward as they move upward, and the filler pipe 11 and the air vent pipe 12 are disposed inside the rear wheel house 6 on the right side. It is provided on the rear side in the vertical direction.

  Most of the damper 10 is disposed in the rear end side portion inside the rear wheel house 6, and the lower end portion of the damper 10 is connected to a portion of the suspension device 9 that is located on the rear side of the wheel connecting portion 9 a. An upper end portion of 10 is attached to a rear end portion of the upper wall portion 6 a of the rear wheel house 6.

  The filler pipe 11 and the air bleeding pipe 12 are respectively composed of horizontal pipes 11a and 12a and vertical pipe portions 11b and 12b. The horizontal pipe portions 11a and 12a are disposed on the lower surface side of the rear floor panel 5 and their base ends. The part is connected to the fuel tank 7. The horizontal pipe portions 11 a and 12 a extend from the fuel tank 7 side to the rear wheel house 6 through the lower side of the right rear side frame 2, and the vertical pipe portions 11 b and 12 b rise from there and pass through the interior of the rear wheel house 6. It extends along the upper wall portion 6a, and an oil filler member 13 is connected to the upper end of the upper wall portion 6a. The oil filler member 13 is attached to an outer panel (not shown) on the right side of the vehicle body.

  The rear wheel house 6 is provided near the outer side in the vehicle width direction of the rear side frame 2 and is formed so as to protrude from the inner panel (not shown) on the side of the vehicle body toward the passenger compartment. 6b, a rear wall portion 6c, and a side wall portion 6d. The front wall portion 6b, the rear wall portion 6c, and the lower end portions of the side wall portion 6d are connected to the rear floor panel 5. In addition, in order to expand a vehicle compartment space between the pair of left and right rear wheel houses 6, a vehicle compartment extension 6e is formed in which the side wall portion 6d of the rear wheel house 6 is recessed outward in the vehicle width direction. Here, in order to form this vehicle compartment expansion part 6e, the damper 10, the filler pipe 11, and the air bleeding pipe 12 are the said arrangement | positioning.

  As shown in FIGS. 3 to 5, the rear structure 1 of the vehicle body includes a rear wall of a region of the right rear wheel house 6 where the damper 10, the filler pipe 11, and the air bleeding pipe 12 overlap in the vehicle width direction. A reinforcing member 20 is provided that connects the portion and the right rear side frame 2 and extends to the vicinity of the damper mounting portion 6 f of the rear wheel house 6.

  This reinforcing member 20 is provided over the rear wall portion 6c in the plan view of the right rear wheel house 6 and the inner surface side (vehicle interior surface side) of the side wall portion 6d and the upper surface side of the right rear side frame 2. It has been. Specifically, the reinforcing member 20 includes a vertical reinforcing portion 20a and a horizontal reinforcing portion 20b, and the vertical reinforcing portion 20a is an inner portion in the vehicle width direction of the inner surface of the rear wall portion 6c of the rear wheel house 6 and the inner surface of the side wall portion 6d. It is fixed and connected in a surface contact manner along the rear end side portion. Further, the horizontal reinforcing portion 20 b is fixed to the upper surface of the rear floor panel 5 at the upper side of the rear floor panel 5 and at the outer side of the vehicle width, and is connected to the rear side frame 2 through the rear floor panel 5.

  As shown in FIGS. 6 and 7, in the vehicle body rear structure 1, a bracket 30 is provided to support the middle part of the filler pipe 11 and the air vent pipe 12 to the right rear side frame 2, and the rear side frame 2 at the time of a vehicle rear collision. When the frame is compressed and deformed, the bracket 30 is attached to the rear side frame 2 so as to be relatively movable in the longitudinal direction of the vehicle body.

  As described above, the horizontal pipe portions 11a and 12a of the filler pipe 11 and the air vent pipe 12 pass below the rear side frame 2, and the portions of the horizontal pipe portions 11a and 12a passing below the rear side frame 2 are brackets. 30 is connected to the lower surface of the rear side frame 2.

  The bracket 30 includes, for example, an annular first portion 30 a that bundles the filler pipe 11 and the air bleeding pipe 12, and a plate-like second portion that protrudes rearward from the first portion 30 a and is connected to the lower surface of the rear side frame 2. Part 30b. The second portion 30b is provided with a connecting piece 30c disposed at a predetermined distance rearward from the first portion 30a. A slit 30d extending from the front end to the rear side is formed in the connecting piece 30c, and a bolt is formed in the slit 30d. The threaded shaft 35 is inserted, and the connecting piece 30 c is fixed to the lower surface of the rear side frame 2 with an appropriate fastening force by the bolt 35 and a nut (not shown).

  When a collision load is input to the right rear side frame 2 and the rear side frame 2 is compressed and deformed and the portion of the rear side frame 2 to which the bracket 30 is connected moves forward at the time of rearward collision of the vehicle, the filler pipe 11 and the air vent are removed. Since the pipe 12 is connected to the vehicle body member other than the rear side frame 2, the pipe 12 is maintained so as not to move. Therefore, the screw shaft of the bolt 35 slides forward through the slit 30 d and comes off from the slit 30 d. The connection between the pipe 11 and the air bleeding pipe 12 and the rear side frame 2 is released, and the bracket 30 can move relative to the rear side frame 2 in the longitudinal direction of the vehicle body.

The vehicle body rear structure 1 described above has the following effects.
The damper 10 is attached to the upper wall portion 6a of the rear wheel house 6, and is provided inside the rear wheel house 6 so as to be inclined so as to move backward as the damper 10 moves upward. The filler pipe 11 and the air vent pipe 12 Is disposed on the rear side of the damper 10 in the vertical direction, so that the damper 10, the filler pipe 11, and the air bleeding pipe 12 are arranged close to the rear end side portion inside the rear wheel house 6. The side wall portion 6d is greatly recessed outward in the vehicle width direction to form a vehicle compartment expansion portion 6e so that the vehicle compartment space between the pair of left and right rear wheel houses 6 can be expanded. When doing so, the lateral width of the sheet can be increased.

  The rear wheel house 6 is connected to the rear side frame 2 and the rear wall portion of the rear wheel house 6 where the damper 10, the filler pipe 11 and the air vent pipe 12 overlap in the vehicle width direction. Since the reinforcing member 20 extending to the vicinity of the portion 6f is provided, the rear wall portion of the rear wheel house 6 can be reinforced, and when a collision load is input to the rear wall portion 6c of the rear wheel house 6 at the time of rear-end collision of the vehicle. The rear wheel house 6 is crushed and the rear wall portion 6c becomes difficult to move forward. Further, even when the rear wall portion 6e of the rear wheel house 6 moves forward, the upper end portion of the damper 10 together with the damper mounting portion 6f The damper 10 is moved upward to raise the damper 10, and a space between the damper 10 and the rear wall portion 6 c of the rear wheel house 6 is maintained. And as much as possible to prevent the filler pipe 11 and the air vent pipe 12 is damaged sandwiched between the damper 10.

  Since the reinforcing member 20 is provided over the rear wall portion 6c in the plan view of the rear wheel house 6 and the inner surface side of the side wall portion 6d and the upper surface side of the rear side frame 2, the rear wheel house 6 is reliably reinforced. At the same time, when the rear side frame 2 is compressed and deformed at the time of rear-end collision of the vehicle, the collision load is input from the rear side frame 2 to the vicinity of the damper mounting portion 6f of the rear wheel house 6 through the reinforcing member 20 to securely fix the damper 10. It is possible to cope with the forward movement of the rear wall 6c of the rear wheel house 6 by getting up.

  A bracket 30 that supports the middle part of the filler pipe 11 and the air bleeding pipe 12 to the rear side frame 2 is provided. Since the bracket 30 is attached so as to be relatively movable, an excessive force acts on the filler pipe 11 and the air vent pipe 12 by connecting the filler pipe 11 and the air vent pipe 12 to the rear side frame 2 by the bracket 30, and the filler pipe 11 and the air vent pipe 12. It is possible to prevent the punching pipe 12 from being damaged.

Here, the modified form which changed the said bracket 30 is demonstrated.
As shown in FIG. 8, the bracket 40 is attached to the rear side frame 2 so as to be relatively movable in the longitudinal direction of the vehicle body when the rear side frame 2 is compressed and deformed at the time of rear-end collision of the vehicle. The bracket 40 has, for example, an annular first portion 40 a that bundles the filler pipe 11 and the air bleeding pipe 12, and a second portion 40 b that is connected to the lower surface of the rear side frame 2.

  The second portion 40b has a support portion 40c that supports the first portion 40a from below, and attachment portions 40d and 40e provided at both front and rear ends of the support portion 40c. The front attachment portion 40d is a pair of bolts. 45 and a nut (not shown) are fixed to the lower surface of the rear side frame 2. A pair of left and right slits 40f extending from the front end to the rear side is formed in the rear mounting portion 40e, and screw shafts of a pair of bolts 45 are inserted into the slits 40f. The attachment portion 40d is fixed to the lower surface of the rear side frame 2 with a sufficient fastening force.

  When a collision load is input to the right-side rear side frame 2 and the rear side frame 2 is compressed and deformed and the portion of the rear side frame 2 to which the bracket 40 is connected moves forward at the time of rearward collision of the vehicle, a pair of rear side frames The screw shaft of the bolt 45 slides forward through the slit 40f and disengages from the slit 40f, whereby the filler pipe 11 and the air bleeding pipe 12 are disconnected from the rear side frame 2 and the bracket 40 is attached to the rear side frame 2. Can be relatively moved in the longitudinal direction of the vehicle body.

  As described above, when the mounting portions 40d and 40e at the two front and rear portions of the bracket 40 are attached to the rear side frame 2, and the rear side frame 2 is compressed and deformed at the time of rearward collision of the vehicle, the mounting portion 40e on the rear side of the bracket 40 from the rear side frame 2 In general, the filler pipe 11 and the air bleeding pipe 12 are reliably supported on the rear side frame 2 and the filler pipe 11 is compressed when the rear side frame 2 is compressed and deformed at the time of rearward collision of the vehicle. And it can prevent reliably that excessive force acts on the air vent pipe 12, and the filler pipe 11 and the air vent pipe 12 are damaged.

  In addition, various modifications can be added and implemented without departing from the spirit of the present invention, and the present invention can be applied to various automobiles and various vehicles other than automobiles.

It is a perspective view of a vehicle body rear part structure. It is a bottom view of a vehicle body rear part structure. It is a perspective view of the principal part containing the rear wheel house of a vehicle body rear part structure. It is a top view of the principal part containing the rear wheel house of a vehicle body rear part structure. It is a side view from the outer side of the principal part containing the rear wheel house of a vehicle body rear part structure. It is a perspective view from the lower side of the principal part containing the rear side frame of a vehicle body rear part structure. It is a bottom view of the principal part containing the rear side frame of a vehicle body rear part structure. It is a bottom view of the principal part containing the rear side frame of the vehicle body rear part structure of a change form.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body rear part structure 6 Rear wheel house 6a Upper wall part 6c Rear wall part 6d Side wall part 6e Cabin expansion part 6f Damper attachment part 10 Damper 11 Filler pipe 20 Reinforcement member 30, 40 Bracket 40d, 40f Attachment part

Claims (5)

In the vehicle body rear structure provided with a damper attached to the upper wall portion of the wheel house and a filler pipe disposed inside the wheel house,
The damper is provided in an inclined shape so as to move backward as it moves upward, and the filler pipe is provided in the vertical direction on the rear side of the damper inside the wheel house,
In the wheel house, the rear wall portion and the rear side frame of the region where the damper and the filler pipe overlap with each other in the vehicle width direction are connected, and a reinforcing member extending to the vicinity of the damper mounting portion of the wheel house is provided. A vehicle body rear structure characterized by that.   The vehicle body rear portion according to claim 1, wherein a vehicle compartment extension portion in which a side wall portion of the wheel house is recessed outward in the vehicle width direction is formed in order to expand a vehicle compartment space between the pair of left and right wheel houses. Construction.   The vehicle body rear portion according to claim 1, wherein the reinforcing member is provided over a rear wall portion of the wheel house in an arch shape in plan view, an inner surface side of the side wall portion, and an upper surface side of the rear side frame. Construction.   A bracket for supporting the middle part of the filler pipe on the rear side frame is provided, and when the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, the bracket is attached to the rear side frame so as to be relatively movable in the longitudinal direction of the vehicle body. The vehicle body rear part structure according to any one of claims 1 to 3.   Two mounting parts at the front and rear of the bracket are attached to the rear side frame, and when the rear side frame is compressed and deformed at the time of rear-end collision of the vehicle, the rear mounting part of the bracket is detached from the rear side frame. The vehicle body rear part structure according to claim 4.

Images