JP2011093344A - Rear body structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rear body structure of vehicle, capable of concurrently satisfying assurance of a minimum ground clearance and capacity of luggage compartment. <P>SOLUTION: The rear body structure of vehicle includes: a luggage compartment floor 24 constituting a rear floor and having a downward swelling spare tire pan 28; a pair of right and left rear side frames 6 arranged on both right and left sides of the luggage compartment floor and extending in the vehicle longitudinal direction; a sub frame 14 connected to the rear side frame and supporting a suspension member 12 of a rear wheel 10; and a silencer 30 disposed over the vehicle width direction between the sub frame and the spare tire pan. The sub frame, the spare tire pan and the silencer are arranged almost the same height in vehicle side view. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a rear body structure of a vehicle, and more particularly to a rear body structure of a vehicle in which a silencer is disposed between a subframe and a storage part (a spare tire pan or the like) of a luggage compartment floor.

  In recent vehicles, a large-sized silencer is used to reduce exhaust resistance and improve fuel efficiency. This large silencer is generally arranged over the vehicle width direction.

As a conventional rear body structure of a vehicle, for example, Patent Document 1 discloses a rear body structure of a vehicle in which a spare tire is disposed on an upper part of a silencer.
Patent Document 2 discloses a rear body structure of a vehicle in which a silencer is disposed immediately below a subframe that supports a suspension member.

JP-A-5-58173 Japanese Patent Laid-Open No. 11-82008

However, in the above-mentioned Patent Document 1, since the spare tire is arranged on the upper part of the silencer, if the minimum ground clearance is ensured, the height of the cargo floor increases and the sufficient cargo space capacity is secured. I can't.
Moreover, in the thing of the patent document 2 mentioned above, since the silencer was arrange | positioned just under the sub-frame which supports a suspension member, there exists a problem similar to patent document 1, and also in order to ensure minimum ground clearance. The silencer must be arranged in the longitudinal direction of the vehicle body, and there was a restriction on the arrangement of the silencer.

  Therefore, the present invention has been made to solve the above-described problems of the prior art, a large-sized silencer can be arranged, and both a minimum ground clearance and a cargo space capacity can be achieved. An object is to provide a rear body structure of a vehicle.

In order to achieve the above-described object, the present invention provides a cargo compartment floor that forms a rear floor of a passenger compartment and has a storage portion that bulges downward, and a vehicle body longitudinal direction that is disposed on both left and right sides of the cargo compartment floor. A pair of left and right rear side frames extending to the rear side frame, a sub frame connected to the rear side frame and supporting a rear wheel suspension member, and a silencer disposed across the vehicle width direction between the sub frame and the storage portion. In addition, the sub-frame, the storage portion, and the silencer are arranged at substantially the same height when viewed from the side of the vehicle.
In the present invention configured as described above, the silencer is disposed between the subframe and the storage portion in the vehicle width direction, and the subframe, the storage portion, and the silencer have substantially the same height in a side view of the vehicle. Therefore, it is possible to suppress an increase in the height of the rear floor of the passenger compartment, thereby making it possible to increase the silencer to reduce exhaust resistance and improve fuel efficiency, Both minimum ground clearance and cargo space capacity can be ensured. In addition, since the storage part of the cargo floor is arranged behind the silencer, the work from the rear of the vehicle body of the storage part becomes easy. Furthermore, at the time of a rear collision, the silencer is crushed by the storage portion as the storage portion moves backward (moves forward with respect to the vehicle body), so that the silencer can be used as an impact absorbing member.

In the present invention, preferably, the sub-frame extends in the vehicle width direction so as to connect the link support portions connected to the left and right rear side frames so as to be separated from each other in the vehicle body front-rear direction and the left and right link support portions. A cross member is provided, and at least a part of the silencer is disposed in the space behind the cross member and inside the link support portion.
In the present invention configured as described above, the silencer can be disposed by effectively utilizing the space behind the cross member and inside the link support portion, thereby suppressing the overhang of the rear portion of the vehicle. Can do.

In this invention, Preferably, a part of silencer is arrange | positioned so that it may wrap with the said link support part by planar view.
In the present invention configured as described above, a part of the silencer is arranged so as to wrap with the link support portion in a plan view, so that the capacity is increased by increasing the silencer in the vehicle width direction (upsizing). ) And a silencer can be arranged further forward to suppress overhang at the rear of the vehicle.

In the present invention, the silencer is preferably attached to and supported by the subframe.
According to the present invention configured as described above, since the silencer is attached to and supported by the subframe, the subframe (link support portion) and the silencer are arranged in a wrapped manner in a plan view. Also, the silencer can be easily attached and supported.

In this invention, Preferably, the silencer is arrange | positioned so that it may wrap with a part of accommodating part by planar view.
In the present invention configured as described above, since the silencer is arranged so as to wrap with a part of the storage part in a plan view, the capacity of the silencer is increased while avoiding interference between the silencer and the storage part. This can improve fuel efficiency.

In the present invention, it is preferable that the silencer is disposed to be inclined forward.
In the present invention configured as described above, since the silencer is tilted forward, the space between the subframe and the cargo floor is effectively used to minimize overhang at the rear of the vehicle. be able to.

In the present invention, preferably, the silencer includes an end pipe extending rearward from the silencer, and the end pipe is disposed on the outer side in the vehicle width direction of the storage portion and above the lower end portion of the storage portion.
In the present invention configured as described above, the minimum ground clearance at the rear of the vehicle can be increased, and the fuel efficiency can be improved without deteriorating the aerodynamic performance.

In the present invention, preferably, the storage portion is a spare tire pan for storing a spare tire.
According to the invention thus configured, when a spare tire is loaded, the storage portion can be used as a storage space for the spare tire.

  According to the rear body structure of the vehicle of the present invention, a large-sized silencer can be arranged, and it is possible to achieve both a minimum ground clearance and a cargo space capacity.

It is the bottom view seen from the lower part which shows the rear body structure of the vehicle by 1st Embodiment of this invention. It is the side view seen from the side which shows the rear body structure of the vehicle by a 1st embodiment of the present invention. It is sectional drawing seen along the III-III line of FIG. It is sectional drawing seen along the IV-IV line of FIG. It is the fragmentary perspective view seen from diagonally downward which shows the rear vehicle body structure of the vehicle by 1st Embodiment of this invention. It is the bottom view seen from the lower part which shows the rear body structure of the vehicle by 2nd Embodiment of this invention. It is the side view seen from the side which shows the rear body structure of the vehicle by a 2nd embodiment of the present invention. It is the bottom view seen from the bottom which shows the rear body structure of the vehicle by a 3rd embodiment of the present invention. It is the fragmentary perspective view seen from diagonally downward which shows the rear part vehicle body structure by the 3rd Embodiment of this invention. It is the fragmentary perspective view seen from diagonally downward which shows the rear vehicle body structure of the vehicle by 4th Embodiment of this invention.

Hereinafter, a rear body structure of a vehicle according to an embodiment of the present invention will be described with reference to the accompanying drawings.
First, the rear body structure of a vehicle according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a bottom view showing a rear body structure of a vehicle according to a first embodiment of the present invention as seen from below, and FIG. 2 is a side view showing a rear body structure of the vehicle according to the first embodiment as seen from a side. 3 is a cross-sectional view taken along line III-III in FIG. 1, FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is according to the first embodiment. It is the fragmentary perspective view seen from the slanting lower part which shows the rear part vehicle body structure.

  As shown in FIGS. 1 and 2, the vehicle 1 includes a rear vehicle body 2, and a pair of left and right rear side frames that are arranged on both left and right sides and extend in the longitudinal direction of the vehicle body below or on the side of the floor 4 of the rear vehicle body 2. 6 is arranged. A fuel tank 8 is disposed below the floor 4 and on the vehicle body front side of the space between the rear side frames 6 and fixedly supported by the rear side frames 6.

  A sub-frame 14 for supporting the suspension member (multi-link) 12 of the multi-link suspension of the rear wheel 10 is disposed behind the fuel tank 8. The sub-frame 14 is connected to the rear side frame 6. Yes. The sub-frame 14 includes a link support portion 16 that is connected to the pair of left and right rear side frames 6 so as to be separated from each other in the vehicle body front-rear direction, and a first extending in the vehicle width direction so as to connect the left and right link support portions 16. The cross member 18 and the second cross member 20 are composed of a lower arm 22 connected to a pair of left and right rear side frames 6.

The floor 4 described above includes a cargo compartment floor 24 that forms a rear floor. Further, the cargo compartment floor 24 is a spare tire that serves as a storage portion (storage space) that bulges downward in order to store the spare tire 26. A pan 28 is formed.
In addition, in 1st Embodiment, although the spare-tire pan is formed as an accommodating part, you may accommodate a 3rd sheet | seat other than this, for example.

Further, in the space between the subframe 14 and the spare tire pan 28 described above, the silencer 30 is disposed across the vehicle width phrase. More specifically, the front portion 30a of the silencer 30 is disposed in the space behind the second cross member 20 and inside the link support portion 16.
Thus, in this embodiment, as shown in FIG. 2, the sub-frame 14, the spare tire pan 28, and the silencer 30 are arranged at substantially the same height when viewed from the side of the vehicle.

Further, as shown in FIG. 3, since the front end portion 28a of the spare tire pan 28 is formed to be inclined forward in a side view, the silencer 30 is similarly inclined forward corresponding to the front end portion 28a. Is formed.
As shown in FIG. 5, the silencer 30 is attached and supported on the link support portion 16 of the subframe 14 by an attachment wire 34 provided with a silencer hanger rubber 32.

  Further, as shown in FIGS. 1 and 5, the silencer 30 includes a pair of left and right end pipes 36 extending rearward from the silencer 30, and these end pipes 36 are arranged on the outer side in the vehicle width direction of the spare tire pan 28. The spare tire pan 28 is disposed above the lower end portion.

Next, the operation of the rear vehicle body 2 of the vehicle according to the first embodiment of the present invention described above will be described.
First, in the rear body 2 of the vehicle according to the first embodiment, the silencer 30 is disposed between the subframe 14 and the spare tire pan 28, and further, the subframe 14, the spare tire pan 28, and the silencer 30 are provided. Since they are arranged at substantially the same height when viewed from the side of the vehicle, it is possible to suppress an increase in the height of the cargo compartment floor 24, which is the rear floor of the passenger compartment, thereby increasing the size of the silencer 30 and reducing the exhaust resistance. The fuel consumption performance can be improved by reducing the amount, and the minimum ground clearance at the rear of the vehicle and the cargo space capacity can be ensured at the same time.

  More specifically, as shown in FIG. 2, in the rear body of the conventional vehicle body, as shown in FIG. 2, the silencer 70 is located below the spare tire pan 74 on the cargo floor 72 that forms the rear floor. In order to secure the minimum ground clearance, the load room floor 72 is raised accordingly, and as a result, the height H2 of the load room is shortened and the load room capacity is reduced. On the other hand, in the present embodiment, as described above, since it is possible to suppress an increase in the height of the luggage compartment floor 24 that is the rear floor of the passenger compartment, the height H1 (> H2) of the luggage compartment is increased. Thus, the cargo space capacity can be increased.

Further, since the spare tire pan 28 on the cargo floor 24 is disposed rearward of the silencer 30, it is easy to take out the spare tire 26 stored in the spare tire pan 28 from the rear of the vehicle body.
Further, at the time of rear-end collision of the vehicle, as the spare tire pan 28 moves backward (moves forward with respect to the vehicle body), the silencer 30 houses the spare tire 26 and is crushed by the spare tire pan 28 having high rigidity. The silencer 30 can be used as an impact absorbing member.

  Further, in the rear body 2 of the vehicle according to the first embodiment, the silencer 30 can be disposed by effectively utilizing the space behind the second cross member 20 and inside the link support portion 16. Thus, an overhang at the rear of the vehicle can be suppressed.

  Moreover, since the silencer is attached and supported on the subframe 14, the silencer can be easily attached and supported using the subframe.

  Further, since the silencer 30 is disposed to be inclined forward, it is possible to effectively utilize the space between the subframe 14 and the cargo compartment floor 24 and to minimize overhang at the rear of the vehicle.

  The silencer 30 includes an end pipe 36 extending rearward from the silencer 30, and the end pipe 36 is disposed outside the spare tire pan 28 in the vehicle width direction and is disposed above the lower end portion of the spare tire pan 28. As a result, the minimum ground clearance at the rear of the vehicle can be increased, and the fuel efficiency can be improved without deteriorating the aerodynamic performance.

  Furthermore, by using the storage portion of the cargo compartment floor 24 as a spare tire pan 28 for storing the spare tire 26, the storage portion can be used as a storage space for the spare tire 26.

  Next, the rear vehicle body structure of the vehicle according to the second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a bottom view showing the rear body structure of the vehicle according to the second embodiment of the present invention, and FIG. 7 is a side view showing the rear body structure of the vehicle according to the second embodiment, seen from the side. is there. Since the basic structure and operational effects of the rear body structure of the vehicle according to the second embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted. Only the differences will be described.

  In the rear vehicle body 40 of the vehicle according to the second embodiment, the rear side 42a of the silencer 42 is formed extending into the space below the front side of the spare tire pan 28, and the rear side 42a of the silencer 42 in plan view is The spare tire pan 28 is arranged so as to wrap (overlap) the front side of the spare tire pan 28.

  In the rear body 40 of the vehicle according to the second embodiment configured as described above, the rear side 42a of the silencer 42 is disposed so as to overlap (overlap) the front side of the spare tire pan 28 in plan view. Further, while avoiding interference between the silencer 42 and the spare tire pan 28, the capacity of the silencer 42 can be increased to improve fuel efficiency.

  Next, the rear vehicle body structure of the vehicle according to the third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a bottom view showing the rear body structure of the vehicle according to the third embodiment of the present invention, and FIG. 9 is a bottom view showing the rear body structure of the vehicle according to the third embodiment of the present invention. It is a fragmentary perspective view. Since the basic structure and operational effects of the rear body structure of the vehicle according to the third embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and description thereof is omitted. Only the differences will be described.

  In the rear vehicle body 50 of the vehicle according to the third embodiment, parts 52a on both sides of the silencer 52 extending in the vehicle width direction are formed to extend into the space below the link support portion 16 of the subframe 14, The parts 52a on both sides of the silencer 52 are arranged so as to wrap (overlap) the link support part 16 in plan view.

  In the rear vehicle body 50 of the vehicle according to the third embodiment configured as described above, the parts 52a on both sides of the silencer 52 are planarly viewed, and the parts 52a on both sides of the silencer 52 are overlapped with the link support part 16 ( Therefore, the silencer 52 can be lengthened in the vehicle width direction to increase the capacity, and the silencer 52 can be arranged further forward to suppress an overhang at the rear of the vehicle.

  Next, a rear vehicle body structure of a vehicle according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 10 is a partial perspective view showing the rear vehicle body structure of the vehicle according to the fourth embodiment of the present invention as seen obliquely from below. Since the basic structure and operational effects of the rear body structure of the vehicle according to the fourth embodiment are the same as those of the first embodiment, the same parts are denoted by the same reference numerals, and the description thereof is omitted. Only the differences will be described.

  In the rear vehicle body 60 of the vehicle according to the fourth embodiment, the silencer 30 and the subframe 14 are disposed offset in the front-rear direction. Further, the silencer 30 is rear-side by an attachment wire 34 having a silencer hanger rubber 32. It is attached to and supported by the frame 6.

  In the rear body 60 of the vehicle according to the fourth embodiment configured as described above, the silencer 30 is mounted and supported on the rear side frame 6 by the mounting wire 34 including the silencer hanger rubber 32. In the case of being arranged offset in the front-rear direction, the number of attachment parts such as the attachment wire 34 can be minimized, and workability for attachment is improved.

1 Vehicle 2, 40, 60, 60 Rear body 4 Floor 6 Rear side frame 8 Fuel tank 10 Rear wheel 12 Suspension member 14 Subframe 16 Link support 18 First cross member 20 Second cross member 22 Lower arm 24 Loading room floor 26 Spare Tire 28 Spare tire pan 30, 42, 52 Silencer 32 Silencer hanger rubber 34 Mounting wire 36 End pipe

Claims (8)

A luggage compartment floor that forms a rear floor of the passenger compartment and has a storage portion that bulges downward;
A pair of left and right rear side frames arranged on the left and right sides of the cargo floor and extending in the longitudinal direction of the vehicle body;
A subframe connected to the rear side frame and supporting a suspension member of the rear wheel;
A silencer disposed across the vehicle width direction between the sub-frame and the storage unit,
A rear body structure of a vehicle, wherein the sub-frame, the storage portion, and the silencer are arranged at substantially the same height in a side view of the vehicle.   The sub-frame includes a link support portion connected to each of the pair of left and right rear side frames so as to be separated from each other in the vehicle longitudinal direction, and a cross member extending in the vehicle width direction so as to connect the left and right link support portions. The rear body structure of the vehicle according to claim 1, wherein at least a part of the silencer is disposed in a space behind the cross member and inside the link support portion.   The rear body structure of the vehicle according to claim 2, wherein a part of the silencer is arranged so as to wrap with the link support part in a plan view.   The rear body structure of the vehicle according to any one of claims 2 to 3, wherein the silencer is attached to and supported by the subframe.   The rear body structure of the vehicle according to any one of claims 1 to 4, wherein the silencer is disposed so as to wrap with a part of the storage portion in plan view.   The rear body structure of the vehicle according to any one of claims 1 to 5, wherein the silencer is disposed to be inclined forward.   The silencer includes an end pipe extending rearward from the silencer, and the end pipe is disposed on the outer side in the vehicle width direction of the storage portion and above the lower end portion of the storage portion. The rear body structure of the vehicle according to any one of the preceding claims.   The rear body structure of a vehicle according to any one of claims 1 to 7, wherein the storage portion is a spare tire pan for storing a spare tire.

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