JP5084709B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure in which a resin under cover is provided at a lower portion of a vehicle body, and the lower portion of the vehicle body is covered with the under cover.

Some vehicle body structures include a resin under cover that covers the lower portion of the vehicle body, a bead portion for reinforcement is formed on the under cover, and the load acting on the under cover is absorbed by the under cover (for example, , See Patent Document 1).
JP 2004-322719 A

In addition, the vehicle body structure includes an under cover that covers the lower part of the vehicle body, and the under cover is formed in a concavo-convex shape to extend the concavo-convex portion in the longitudinal direction of the vehicle body, thereby adjusting the thickness of the entire under cover (thick) Is known.
By forming uneven portions on the under cover and adjusting (thickening) the plate thickness of the entire under cover, it becomes possible to transmit the load acting on the under cover to the skeleton member of the vehicle body structure (for example, Patent Document 2). reference.).
JP 2008-174122 A

According to the vehicle body structures of Patent Documents 1 and 2, the load acting on the skeleton member of the vehicle body structure can be reduced by absorbing (transmitting) the load with the under cover.
Therefore, it becomes possible to remove the reinforcing member and the like from the skeleton member of the vehicle body structure, and the vehicle can be reduced in weight.

However, the under cover of Patent Document 1 is formed by forming a reinforcing bead portion on a resin under cover, and it is difficult to sufficiently ensure the rigidity of the under cover.
For this reason, when the vehicle runs at a high speed, if the air flows along the lower surface of the under cover and the lower surface side of the under cover becomes negative pressure, the under cover may be bent downward.

  On the other hand, since the under cover of Patent Document 2 adjusts (thickens) the thickness of the entire under cover so as to transmit the applied load to the skeleton member, it is difficult to suppress the weight of the under cover.

  It is an object of the present invention to provide a vehicle body structure that can ensure the rigidity and strength of the under cover and can suppress an increase in the weight of the under cover.

The invention according to claim 1 is a vehicle body structure including an under cover that covers a lower portion of a vehicle body, wherein the under cover is formed so as to cover a lower portion of the vehicle body, and a pair of storage recesses extending in the vehicle body front-rear direction . A cover main body formed in a substantially U-shaped cross-section with an upward opening at the inner wall and the inner bottom, and a reinforcing aggregate housed in the housing recess and extending in the vehicle body longitudinal direction along the housing recess The aggregate is formed in a substantially U-shaped cross-section with an upward opening at a pair of outer wall portions facing the pair of inner wall portions and an outer bottom portion connecting the pair of outer wall portions; In order to use a deformation preventing means for preventing the aggregate from being deformed by a load acting in the vehicle longitudinal direction with respect to the material, and using the pair of inner wall portions and the inner bottom portion of the storage recess as the deformation preventing means, pair Provided such inner wall portion opposed to the pair of the outer wall of said aggregate, wherein the inner bottom portion is provided on the outer bottom portion of the aggregate, it was.

According to a second aspect of the present invention, the aggregate has an inclined portion inclined in an upward gradient toward the front of the vehicle body in the vicinity of the front end portion, thereby connecting a straight line connecting the lower end of the front bumper and the point where the front wheel contacts the road surface. An inclination angle is secured, and a reinforcing bead is provided at the inclined portion .

According to a third aspect of the present invention, the vehicle body is a subframe formed of a left and right side member, a front cross member, and a rear cross member in a substantially rectangular shape, and a front end portion of the aggregate is fastened to the front cross member by a fastening member. In addition, a rear side portion of the cover main body and a rear end portion of the aggregate are fastened together with a fastening member to an end frame provided on the rear cross member .

  According to a fourth aspect of the present invention, a plurality of the aggregates are provided on the cover body, and the plurality of aggregates are arranged in a substantially V shape.

In the invention according to claim 1, a storage recess extending in the longitudinal direction of the vehicle body is formed in the cover body, and reinforcing aggregate is stored in the storage recess.
Therefore, the rigidity and strength of the undercover can be ensured by the reinforcing aggregate.
Thereby, when the vehicle travels at a high speed, even if air flows along the lower surface of the under cover and the lower surface side of the under cover becomes negative pressure, the under cover can be prevented from bending downward.

In addition, a deformation preventing means for preventing plastic deformation (deformation) of the aggregate is provided in the storage recess.
Therefore, when a load acts on the reinforcing aggregate in the longitudinal direction of the vehicle body, it is possible to prevent the aggregate from being deformed by the applied load and to support the applied load with the aggregate (under cover). it can.
Thereby, it is not necessary to increase the rigidity and strength by forming the reinforcing aggregate thick, and the weight increase of the under cover can be suppressed.

In the invention according to claim 1 , in order to use the pair of inner wall portions of the storage recess as the deformation preventing means, the pair of inner wall portions are provided to face the outer wall portion of the aggregate.
Thereby, when a load acts on the reinforcing aggregate, it is possible to prevent the outer wall portion of the aggregate from coming into contact with the inner wall portion of the storage recess and deforming the aggregate at the inner wall portion.

In the invention according to claim 1 , the aggregate is formed in a substantially U-shaped cross section with the pair of outer wall portions and the outer bottom portion, and the outer bottom portion is provided on the inner bottom portion of the storage recess.
Accordingly, when a load is applied to the reinforcing aggregate, it is possible to prevent the outer wall portion of the aggregate from coming into contact with the inner wall portion of the storage recess and deforming the aggregate in the vehicle body width direction at the inner wall portion.
Furthermore, it is possible to prevent the aggregate from being deformed in the vertical direction at the inner bottom by providing the outer bottom of the aggregate on the inner bottom of the storage recess.
Further, in the invention according to claim 2, by having an inclined portion inclined in an upward gradient toward the front of the vehicle body in the vicinity of the front end portion of the aggregate, the lower end of the front bumper and the point where the front wheel contacts the road surface. The angle of inclination of the tied straight line was secured.
Furthermore, by providing a bead for reinforcement at the inclined portion, it is possible to ensure the rigidity and strength of the inclined portion inclined at the upward slope.
By ensuring the rigidity and strength of the inclined part of the aggregate, when a load acts on the aggregate in the longitudinal direction of the vehicle body, the applied load can be efficiently transmitted from the inclined part toward the rear of the vehicle body.
In the invention according to claim 3, the vehicle body is a sub-frame formed of a left and right side member, a front cross member, and a rear cross member in a substantially rectangular shape, and the front end of the aggregate is fastened to the front cross member. Then, both the rear side portion of the cover body and the rear end portion of the aggregate were fastened to the end frame provided on the rear cross member with a fastening member.

In the invention which concerns on Claim 4, the some aggregate provided in the cover main body was arrange | positioned in substantially V shape.
Thereby, it is possible to ensure a relatively large interval between the adjacent aggregates, and it is possible to use the ensured relatively large interval for a space such as maintenance inspection.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that “front”, “rear”, “left”, and “right” indicate the direction viewed from the driver, the front side is Fr, the rear side is Rr, the left side is L, and the right side is R.

FIG. 1 is a perspective view showing a vehicle body structure (first embodiment) according to the present invention.
The vehicle body structure 10 includes left and right front side frames 11 extending in the longitudinal direction of the vehicle body, a front bulkhead 13 provided between front end portions 11a of the left and right front side frames 11, and a lower portion of the front bulkhead 13. A subframe 16 disposed behind the member 14 and an under cover 18 provided at the lower portion of the subframe 16 are provided.

The left front side frame 11 includes a side extension 22 that extends substantially horizontally in the longitudinal direction of the vehicle body, and a side end frame 23 that extends downward from the rear end portion 22a of the side extension 22 toward the rear of the vehicle body. And.
The right front side frame 11 is a member symmetrical to the left front side frame 11, and the same reference numerals as those of the left front side frame 11 are given to the respective constituent members and the description thereof is omitted.

The front bulkhead 13 is provided at the left and right side stays 25 provided at the front end portions 11 a of the left and right front side frames 11 (that is, the front end portions of the side extensions 22) and the upper end portions 25 a of the left and right side stays 25. The upper member 26 and the lower member 14 provided at the lower ends 25b of the left and right side stays 25 are formed in a substantially rectangular frame shape.
A subframe 16 is disposed behind the lower member 14 of the front bulkhead 13.

  The sub-frame 16 includes a left side member 31 extending in the longitudinal direction of the vehicle body, a right side member 32 extending in the longitudinal direction of the vehicle body, and front end portions 31a and 32a of the left and right side members 31 and 32. A frame formed in a substantially rectangular shape with a front cross member 33 spanned between and a rear cross member 34 spanned between rear end portions 31b and 32b (see FIG. 3) of the left and right side members 31 and 32. is there.

The front end portions 31a and 32a of the left and right side members 31 and 32 are fastened to the left and right leg portions 36 and 37 by bolts (not shown), respectively.
The left and right leg portions 36 and 37 are joined to the front end portions 11a of the left and right front side frames 11, respectively.

Further, the central portion 31c of the left side member 31 is fastened to the central portion 11b of the left and right front side frames 11 with bolts (not shown).
Further, the rear end portion 31b (see FIG. 3) of the left side member 31 is fastened to the rear end portion 11c of the left front side frame 11 with a bolt (not shown).
As with the left side member 31, the right side member 32 has a center portion 32c and a rear end portion 32b (see FIG. 3) that are bolts (not shown) at the center portion and the rear end portion of the right front side frame 11, respectively. It is concluded with.

  Thus, the sub frame 16 is fastened to the lower portions of the left and right front side frames 11 with bolts in a state where the sub frame 16 is disposed behind the lower member 14 of the front bulkhead 13.

A power source (not shown) is placed on the subframe 16. As the power source, for example, a unit in which an engine and a transmission are combined together is applied.
Further, an under cover 18 is provided on the lower portion 16a (see FIG. 3) of the subframe 16.

2 is a perspective view showing the under cover of the vehicle body structure according to the first embodiment, FIG. 3 is a perspective view showing the under cover according to the first embodiment viewed from below, and FIG. 4 is an under view of FIG. It is a disassembled perspective view which shows a cover.
The under cover 18 is a cover that covers the lower portion of the subframe (vehicle body) 16 by being provided in the lower portion 16 a of the subframe 16.
The under cover 18 includes a resin cover body 41 formed so as to cover the lower portion 16 a of the subframe 16, a plurality of aggregates 42 provided on the cover body 41, and a rear side portion 41 d of the cover body 41. And an end frame 43 provided.

The cover main body 41 is a plate member formed in a substantially rectangular shape so as to cover the lower portion 16 a of the subframe 16.
The cover body 41 has a left side portion 41 a fastened to the lower portion of the left side member 31 by a plurality of left clips (fastening members) 45, and a right side portion 41 b has a plurality of right clips (fastening members) to the lower portion of the right side member 32. ) 45 is fastened.

The cover body 41 has a front side portion 41 c fastened to the lower portion 14 a of the lower member 14 by a plurality of front clips (fastening members) 46.
Further, the cover body 41 has a rear side portion 41 d fastened to the end frame 43 by a plurality of rear rivets (fastening members) 47.

The end frame 43 is fastened to the lower portion of the rear cross member 34 with a plurality of rear bolts (fastening members) 48.
Therefore, the cover main body 41 is attached to the lower portion 16 a of the subframe 16.
The configuration for attaching the cover main body 41 to the lower portion 16a of the subframe 16 will be described in detail with reference to FIGS.

5 is an exploded perspective view showing the under cover shown in FIG. 2, and FIG. 6 is a sectional view taken along line 6-6 of FIG.
The cover main body 41 is formed (provided) with a plurality of storage recesses 52 extending in parallel along a center line 50 extending in the vehicle longitudinal direction.
The storage recess 52 includes a pair of inner wall portions 53 provided in parallel with each other at a predetermined interval S <b> 1 and an inner bottom portion 54 provided at a lower end portion 53 a of the pair of inner wall portions 53.
The storage recess 52 is formed in a substantially U-shaped cross section with an upward opening by the pair of inner wall portions 53 and the inner bottom portion 54, whereby the aggregate 42 is stored in the storage recess 52.

The pair of inner wall portions 53 are vertical walls that are vertically raised, and extend substantially horizontally in the longitudinal direction of the vehicle body.
The inner bottom portion 54 is a flat portion provided at the lower end portion 53a of the pair of inner wall portions 53, and extends substantially horizontally toward the vehicle body longitudinal direction.

Here, the storage recess 52 is provided with (constituting) deformation preventing means 56 that prevents deformation of the aggregate 42.
The deformation prevention means 56 is a means for preventing the aggregate 42 from being plastically deformed (deformed) when a load acts on the aggregate 42 in the longitudinal direction of the vehicle body.
In the present embodiment, the deformation prevention means 56 is constituted by a pair of inner wall portions 53 and an inner bottom portion 54 (that is, constituted by a storage recess 52).

Thus, the aggregate 42 can be reinforced by providing the storage recess 52 with the deformation preventing means 56 for preventing the plastic deformation (deformation) of the aggregate 42.
Thereby, it is not necessary to increase the thickness of the reinforcing aggregate 42 to increase the rigidity and strength, and the weight increase of the under cover 18 can be suppressed.

The aggregate 42 is a reinforcing member that is housed in the housing recess 52 and extends in the longitudinal direction of the vehicle body along the housing recess 52.
That is, the aggregate 42 is extended in parallel along the center line 50 extending in the longitudinal direction of the vehicle body.
Therefore, the aggregate 42 can be disposed substantially parallel to the load F acting on the front end portion 42 a of the aggregate 42.
Thereby, the load F acting on the front end portion 42 a of the aggregate 42 can be efficiently supported by the aggregate 42.

The aggregate 42 includes a pair of outer wall portions 61 arranged in parallel with each other at a predetermined interval S <b> 2 and an outer bottom portion 62 that connects the pair of outer wall portions 61.
The aggregate 42 is formed in a substantially U-shaped cross section with an upward opening at the pair of outer wall portions 61 and the outer bottom portion 62.

The pair of outer wall portions 61 are vertical walls that are vertically raised, and extend substantially horizontally in the longitudinal direction of the vehicle body.
The outer bottom portion 62 is a flat portion provided at the lower end portion 61a of the pair of outer wall portions 61 and extends substantially horizontally toward the vehicle body longitudinal direction.

  In the state in which the aggregate 42 is stored in the storage recess 52, the front end 42 a is fastened to the front cross member 33 (see FIG. 4) with a front bolt (fastening member) 64, and the rear end 42 b is covered with the end frame 43. The main body 41 (rear side portion 41d) is fastened together with the rear rivet 47, and a portion 42c between the front and rear end portions 42a, 42b is fastened to the inner bottom portion 54 of the storage recess 52 with a plurality of central rivets (fastening members) 65. .

In this way, the storage recess 52 extending in the vehicle body longitudinal direction is formed in the cover body 41, and the reinforcing aggregate 42 is stored in the storage recess 52, whereby the under cover 18 is reinforced by the plurality of aggregates 42. Yes.
That is, the rigidity and strength of the undercover 18 are ensured by the reinforcing aggregate 42.

The aggregate 42 is provided so that the pair of outer wall portions 61 faces the pair of inner wall portions 53 at a predetermined interval S3 while being stored in the storage recess 52.
In this way, the pair of outer wall portions 61 are provided to face the pair of inner wall portions 53 with a predetermined interval S3, so that the pair of inner wall portions 53 of the storage recess 52 are used as the deformation preventing means 56. Yes.
As a result, when the load F acts on the reinforcing aggregate 42, the outer wall portion 61 of the aggregate 42 comes into contact with the inner wall portion 53 of the storage recess 52, and the aggregate 42 is plastically deformed in the vehicle body width direction. Can be blocked by the inner wall portion 53.

Furthermore, since the outer bottom 62 is provided on the inner bottom 54 of the storage recess 52, the inner bottom 54 of the storage recess 52 is used as the deformation preventing means 56.
Thereby, it is possible to prevent the aggregate 42 from being plastically deformed in the vertical direction at the inner bottom 54 of the storage recess 52.

FIG. 7 is a perspective view of the state in which the aggregate according to the first embodiment is attached to the front cross member as viewed from below.
In the aggregate 42, an inclined portion 42d in the vicinity of the front end portion 42a is inclined with an upward slope toward the front of the vehicle body in order to ensure an approach angle θ (see FIG. 1).
The approach angle θ is a straight inclination angle connecting the lower end of the front bumper and the point where the front wheel contacts the road surface.

The aggregate 42 is provided with a reinforcing bead 67 extending in the longitudinal direction of the vehicle body at the center in the vehicle width direction in the inclined portion 42d. The bead 67 is a portion raised above the vehicle body.
In the present embodiment, the reinforcing bead 67 is illustrated as being raised above the vehicle body. However, the present invention is not limited to this. For example, a reinforcing bead 67 bulged downward from the vehicle body is used as the reinforcing bead 67. It is also possible.

By providing the reinforcing bead 67 at the inclined portion 42d of the aggregate 42, it is possible to ensure the rigidity and strength of the inclined portion 42d inclined at the upward slope.
By ensuring the rigidity and strength of the inclined portion 42d of the aggregate 42, when a load acts on the aggregate 42 in the longitudinal direction of the vehicle body, the applied load is efficiently transmitted from the inclined portion 42d toward the rear of the vehicle body. be able to.

2 and 5, the end frame 43 is a frame that extends in the vehicle body width direction along the rear side portion 41 d of the cover main body 41.
The end frame 43 includes a frame portion 71 having a substantially U-shaped cross section, a front protruding side 72 protruding from the front side 71a of the frame portion 71 toward the front of the vehicle body, and a rear side of the frame portion 71. A rear projecting side 73 projecting toward the rear of the vehicle body from 71c.
That is, the end frame 43 is formed in a substantially hat-shaped cross section by the frame portion 71, the front overhang side 72 and the rear overhang side 73.

The frame portion 71 has a top portion 71b fastened to a front mounting portion 34a (see FIG. 2) of the rear cross member 34 by a plurality of bolts 48 from below.
The front projecting side 72 is fastened with rivets 47 to the cover body 41 (rear side portion 41d) and the aggregate 42 to the rear end portion 42b.

8 is a cross-sectional view taken along line 8-8 in FIG.
A front side portion 41 c of the cover body 41 is fastened to the lower portion 14 a of the lower member 14 with a front clip 46.
Further, the rear side portion 41 d of the cover main body 41 is fastened together with the rear end portion 42 b of the aggregate 42 by a rear rivet 47 to the front overhang side 72 of the end frame 43.

Further, the top portion 71 b of the end frame 43 is fastened to the front mounting portion 34 a of the rear cross member 34 by a rear bolt 48 from below.
In addition, the front end portion 42 a of the aggregate 42 is fastened to the lower portion 33 a of the front cross member 33 with a front bolt 64.

9 is a cross-sectional view taken along line 9-9 of FIG.
A left side portion 41 a of the cover body 41 is fastened to the lower portion 31 d of the left side member 31 with a left clip 45.
Further, the right side 41b of the cover main body 41 shown in FIG. 3 is fastened to the lower portion 32a of the right side member 32 with the right clip 45 in the same manner as the left side 41a.

  As shown in FIGS. 8 and 9, the cover main body 41, the plurality of aggregates 42 and the end frame 43 are fastened to the subframe 16 with fastening members such as bolts and clips. A cover 18 is provided on the lower portion 16 a of the subframe 16.

Next, an example in which air flows along the under cover 18 of the vehicle body structure 10 when the vehicle travels at a high speed will be described with reference to FIG.
FIG. 10 is a diagram illustrating a state in which air flows along the lower surface of the under cover according to the first embodiment.
When the vehicle travels at high speed, air flows along the lower surface 18a (see FIG. 3) of the under cover 18 as shown by the arrow A, and the lower surface 18a side of the under cover 18 becomes negative pressure.

Here, the reinforcing aggregate 42 is stored in the storage recess 52 of the cover main body 41, so that the rigidity and strength of the undercover 18 are secured by the reinforcing aggregate 42.
Thereby, even if the lower surface 18a side of the under cover 18 becomes a negative pressure, the under cover 18 can be prevented from bending downward.

Next, an example in which a load is applied to the front end portion of the vehicle body structure 10 and the applied load is transmitted to the front side portion 41c of the under cover 18 will be described with reference to FIG.
FIGS. 11A to 11C are diagrams illustrating a state in which a load is applied to the front side portion of the under cover according to the first embodiment.
In (a), a load F1 acts on the front side portion 41c of the under cover 18 (cover body 41) as shown by an arrow, and the acted load F1 passes through the front side portion 41c as a load F2 on the front end portion 42a of the aggregate 42. Reportedly.

  In (b), a buckling load acts on the aggregate 42 by transmitting the load F <b> 2 to the front end portion 42 a of the aggregate 42. When a buckling load acts on the aggregate 42, the aggregate 42 is elastically deformed in the direction of arrow B.

In (c), the aggregate 42 is elastically deformed, so that the outer wall 61 of the aggregate 42 comes into contact with the inner wall 53 (that is, the deformation preventing means 56) of the storage recess 52.
Since the outer wall portion 61 of the aggregate 42 abuts against the inner wall portion 53 of the storage recess 52, the inner wall portion 53 can prevent the aggregate 42 from being plastically deformed.
That is, the aggregate 42 can be reinforced by the inner wall portion 53 (that is, the deformation preventing means 56) of the storage recess 52.

Further, a central rivet 65 (see FIG. 11A) is provided in a state in which the outer bottom 62 of the aggregate 42 is in contact with the inner bottom 54 of the storage recess 52.
As described above, the outer bottom portion 62 of the aggregate 42 is provided on the inner bottom portion 54 of the storage recess 52, so that the aggregate 42 is plastically deformed in the vertical direction at the inner bottom portion 54 (that is, the deformation preventing means 56) of the storage recess 52. Can be prevented.

Thus, the load F2 transmitted to the front end portion 42a of the aggregate 42 can be supported by the aggregate 42 and transmitted to the rear cross member 34 (see FIG. 11A) via the end frame 43.
Thus, it is necessary to reinforce the aggregate 42 with the inner wall 53 and the inner bottom 54 (that is, the deformation preventing means 56) of the storage recess 52, thereby forming the aggregate 42 thick and increasing the rigidity and strength. In addition, an increase in the weight of the under cover 18 can be suppressed.

Next, the under covers of the second to fourth embodiments will be described with reference to FIGS. In addition, in 2nd-4th embodiment, the same code | symbol is attached | subjected about the same similar member as the undercover 18 of 1st Embodiment, and description is abbreviate | omitted.
FIG. 12 is a perspective view showing the under cover (second embodiment) according to the present invention as viewed from below.
In the under cover 80 of the second embodiment, a storage recess 52 is formed in a substantially V shape in the cover body 81, and an aggregate 42 is provided in the approximately V-shaped storage recess 52, respectively.
The cover body 81 is different from the first embodiment (cover body 41) in that the storage recess 52 is formed in a substantially V shape, and other configurations are the same as those of the first embodiment.

The storage recess 52 is formed in a substantially V shape with the front of the vehicle body opened. Accordingly, the plurality (two) of aggregates 42 are arranged in a substantially V shape with the front of the vehicle body opened.
By disposing a plurality of (two) aggregates 42 in a substantially V shape, a relatively large interval between adjacent aggregates 42 can be secured.

Thereby, for example, the oil pan 83 can be disposed in the interval between the adjacent aggregates 42 and 42, and a space for accommodating the oil pan 83 can be secured.
Further, for example, the aggregate 42 can be shifted from a drain plug (not shown) for draining transmission oil.
Thereby, the drain hole 84 facing the drain plug can be formed between the adjacent storage recesses 52.
As described above, the plurality of aggregates 42 are arranged in a substantially V shape, so that a relatively large interval secured can be used for a space for maintenance and inspection.

FIG. 13 is a perspective view showing the under cover (third embodiment) according to the present invention as viewed from below.
In the under cover 90 according to the third embodiment, a storage recess 52 is formed in a substantially V shape in the cover body 41, and an aggregate 42 is provided in the approximately V-shaped storage recess 52.
The cover body 91 is different from the first embodiment (cover body 41) in that the storage recess 52 is formed in a substantially V shape, and the other configuration is the same as that of the first embodiment.

The storage recess 52 is formed in a substantially V shape with the rear of the vehicle body opened. Therefore, the plurality (two) of aggregates 42 are arranged in a substantially V shape with the rear of the vehicle body opened.
By arranging a plurality (two) of aggregates 42 in a substantially V shape, a relatively large interval between the adjacent aggregates 42 and 42 can be secured.

Thereby, for example, the oil pan 93 can be arranged in the interval between the adjacent aggregates 42 and 42, and a space for accommodating the oil pan 93 can be secured.
Further, for example, the aggregate 42 can be shifted from a drain plug (not shown) for draining transmission oil.
Thereby, the drain hole 94 facing the drain plug can be formed between the adjacent storage recesses 52.
As described above, the plurality of aggregates 42 are arranged in a substantially V shape, so that a relatively large interval secured can be used for a space for maintenance and inspection.

FIG. 14 is a perspective view showing a state in which an under cover (fourth embodiment) according to the present invention is viewed from below.
In the under cover 100 of the fourth embodiment, a storage recess 52 is formed in a substantially W shape in the cover main body 101, and an aggregate 42 is provided in the substantially W-shaped storage recess 52, respectively.
The cover body 101 is the same as the first embodiment except for the difference in the storage recess 52 from the first embodiment (cover body 41) in that the storage recess 52 is formed in a substantially W shape.

The storage recess 52 is formed in a substantially W shape with the front of the vehicle body opened. Therefore, the plurality of (four) aggregates 42 are arranged in a substantially W shape with the front of the vehicle body opened.
By disposing a plurality of (four) aggregates 42 in a substantially W shape, a relatively large interval between adjacent aggregates 42 can be secured.

Thereby, for example, the oil pan 103 can be arranged in the interval between the adjacent aggregates 42 and 42, and a space for accommodating the oil pan 103 can be secured.
Further, for example, the aggregate 42 can be shifted from a drain plug (not shown) for draining transmission oil.
Thereby, the drain hole 104 facing the drain plug can be formed between the adjacent storage recesses 52.
In this way, the plurality of aggregates 42 are arranged in a substantially W shape, so that a relatively large interval secured can be utilized for a space for maintenance and inspection.

The vehicle body structure according to the present invention is not limited to the above-described embodiment, and can be changed or improved as appropriate.
For example, in the above-described embodiment, the example in which the under cover 18 is attached to the sub-frame 16 at the front part of the vehicle body has been described. However, the present invention is not limited thereto, and the under cover of the present invention is attached to other parts such as the rear part of the vehicle body. Is also possible.

  Further, in the above-described embodiment, examples in which the left and right clips 45, the front clip 46, the rear rivet 47, the rear bolt 48, the front bolt 64, the central rivet 65, and the like are used as the fastening members are described. The site using the fastening member can be arbitrarily selected.

  Further, in the above-described embodiment, the example in which the inclined portion 42d is formed in the aggregate 42 and the reinforcing bead 67 is provided in the inclined portion 42d has been described. However, the present invention is not limited to this. It is also possible to remove the bead 67.

  Further, the subframe 16, the under covers 18, 80, 90, 100, the cover main body 41, the aggregate 42, the storage recess 52, the pair of inner wall portions 53, the inner bottom portion 54, the deformation prevention means 56, shown in the above embodiment, The shapes of the pair of outer wall portions 61 and the outer bottom portion 62 are not limited to those illustrated, and can be appropriately changed.

  INDUSTRIAL APPLICABILITY The present invention is suitable for application to an automobile provided with a vehicle body structure in which a resin under cover is provided at the lower portion of the vehicle body and the lower portion of the vehicle body is covered with the under cover.

1 is a perspective view showing a vehicle body structure (first embodiment) according to the present invention. It is a perspective view which shows the undercover of the vehicle body structure which concerns on 1st Embodiment. It is a perspective view which shows the state which looked at the undercover which concerns on 1st Embodiment from the downward direction. It is a disassembled perspective view which shows the under cover of FIG. It is a disassembled perspective view which shows the undercover shown in FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is the perspective view which looked at the state which attached the aggregate concerning a 1st embodiment to the front cross member from the lower part. FIG. 8 is a sectional view taken along line 8-8 in FIG. 3. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 3. It is a figure explaining the state through which air flows along the lower surface of the undercover concerning a 1st embodiment. It is a figure explaining the state where the load acted on the front side part of the undercover concerning a 1st embodiment. It is a perspective view which shows the state which looked at the undercover (2nd Embodiment) which concerns on this invention from the downward direction. It is a perspective view which shows the state which looked at the undercover (3rd Embodiment) which concerns on this invention from the downward direction. It is a perspective view which shows the state which looked at the undercover (4th Embodiment) which concerns on this invention from the downward direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Car body structure, 16 ... Sub-frame (car body), 16a ... Lower part of sub-frame (lower part of car body), 18, 80, 90, 100 ... Under cover , 31 ... Left side member, 32 ... Right side member, 33 ... Front cross member, 34 ... Rear cross member , 41 ... Cover body , 41c ... Front side part of cover body, 41d ... Rear side part of cover body , 42 ... Aggregate , 42a ... Front end part of aggregate, 42b ... Aggregate Rear end portion, 47 ... rear rivet (fastening member) , 52 ... storage recess, 53 ... pair of inner wall portions, 54 ... inner bottom portion, 56 ... deformation preventing means, 61 ... pair of outer wall portions, 62 ... outer bottom portion , 64 ... Front bolt (fastening member) .

Claims (4)

In the vehicle body structure with an under cover that covers the lower part of the vehicle body,
The under cover is
A cover main body formed so as to cover the lower portion of the vehicle body, and having a housing concave portion extending in the longitudinal direction of the vehicle body formed in a substantially U-shaped cross section with an upward opening at the pair of inner wall portions and the inner bottom portion ;
A reinforcing aggregate housed in the housing recess and extending in the vehicle longitudinal direction along the housing recess;
The aggregate is
A pair of outer wall portions facing the pair of inner wall portions and an outer bottom portion connecting the pair of outer wall portions are formed in a substantially U-shaped cross section with an upward opening,
The storage recess is
A deformation preventing means for preventing the aggregate from being deformed by a load acting on the aggregate in the vehicle longitudinal direction ;
In order to use the pair of inner wall portions and the inner bottom portion of the storage recess as the deformation prevention means, the pair of inner wall portions are provided to face the pair of outer wall portions of the aggregate, and the inner bottom portion is the bone. A vehicle body structure provided on the outer bottom of the material . The aggregate is
In the vicinity of the front end portion, by having an inclined part inclined at an upward slope toward the front of the vehicle body, a straight inclination angle connecting the lower end of the front bumper and the point where the front wheel contacts the road surface is secured,
The vehicle body structure according to claim 1, wherein a reinforcing bead is provided at the inclined portion . The vehicle body is a subframe formed in a substantially rectangular shape with left and right side members, a front cross member and a rear cross member,
The front end of the aggregate is fastened to the front cross member with a fastening member,
Wherein the rear cross member end frame provided on the rear end portion of the side portion and the aggregate of the cover body is fastened together by a fastening member, was of claim 1 or claim 2, wherein the Body structure. The aggregate is
A plurality of cover bodies are provided;
The vehicle body structure according to claim 1 or 2, wherein the plurality of aggregates are arranged in a substantially V shape.

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