JP5504014B2 - Vehicle body side structure - Google Patents

Description

  The present invention relates to a vehicle body side structure of a vehicle such as an automobile.

  When a load acts on the side of a vehicle such as an automobile from the outside in the vehicle body width direction, the door outer panel may be deformed inward in the vehicle body width direction. There is known a vehicle body side structure in which a door impact beam that can withstand a vehicle is provided along the vehicle longitudinal direction (see Patent Document 1).

Japanese Patent No. 3389694

  In the conventional vehicle body side structure, the side sill is arranged inside the door impact beam, and the center floor cross member is arranged inside the side sill, but the side sill is a structure whose cross section is open in the vehicle longitudinal direction. When a large load is applied during a side collision or the like, there is a problem that the door is deformed into the vehicle interior and enters and the side sill is largely deformed.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle body side portion structure that can sufficiently receive the load and support the entire vehicle body even when a large input load is applied from the vehicle body side portion.

In order to achieve the above object, the invention described in claim 1 includes a side sill inner (for example, the side sill inner 20 in the embodiment) and a side sill outer (for example, implementation) provided on the side of the vehicle compartment along the longitudinal direction of the vehicle body. The side sill (for example, the side sill 9 in the embodiment) and the rear wall (for example, the front wall 28 in the embodiment) and the rear wall (for example, in the embodiment) A bag-shaped portion (for example, the bag-shaped portion 41 in the embodiment) closed with the rear wheel house extension 40 in the embodiment is formed, and is disposed along the vehicle body front-rear direction at the rear of the vehicle body, and a floor panel (for example, In the embodiment, the front floor panel 45, the rear floor panel 47, and the floor panel step portion 46) extend along the vehicle body width direction. Cross member provided Te (e.g., the middle cross member 48 in the embodiment) rear frame of closed cross section which is connected to the (e.g., the rear frame 55 in the embodiment) provided, the cross member of the front end portion of the rear frame The side sill outer of the side sill is joined to the side sill inner of the front end of the bag-like part, and the side sill outer of the side sill is connected to the front part of the side sill outer (for example, the side sill outer in the embodiment). The front part 25) and a rear part of the side sill outer (for example, the rear part 26 of the side sill outer in the embodiment) are divided, and the rear part of the side sill outer is bent to the vehicle interior side at the front end portion of the outer wall part directed to the vehicle exterior side. A lower wall part (for example, for example) that bends toward the vehicle interior side at the lower edge of the outer wall part. The lower wall 29 in the embodiment, the rear end opening opened rearward at the rear end of the outer wall (for example, the rear end opening 32 in the embodiment), and the upper edge of the outer wall bent to the vehicle interior side. A wall portion (for example, the upper wall portion 30 in the embodiment) is provided, and the front wall portion, the lower wall portion, and the upper wall portion are continuously formed, and the front wall portion is joined to the side sill inner A peripheral flange (for example, the peripheral flange 33 in the embodiment) is formed, and the front portion of the wheel arch portion (for example, the rear wheel arch portion 8 in the embodiment) of the vehicle body is used as the rear wall portion. The front part closes the rear end opening of the rear part of the side sill outer, and the front wall part of the rear part of the side sill outer and the front part of the wheel arch part sandwich the bag-like part between the side sill inner. It is characterized by being formed .

According to the second aspect of the present invention, a door mounting opening (for example, the door mounting opening 4 in the embodiment) of the rear side door (for example, the rear side door 3 in the embodiment) is provided on the rear side of the bag-shaped portion in the rear portion of the side sill. ) Is provided with a raised portion (for example, raised portion 34 in the embodiment) that rises rearward along the lower rear end, and the raised portion is disposed in the rear side door along the longitudinal direction of the vehicle body (for example, The door beam 10) in the embodiment is opposed to the rear end.

  According to a third aspect of the present invention, a horizontal upper wall portion (for example, the horizontal portion 31 in the embodiment) oriented in the vertical direction is provided at an upper portion of the raised portion, and the upper wall portion is formed at a height of the rear end portion of the door beam. It is characterized by being opposed to the vertical position in the vehicle body width direction.

According to a fourth aspect of the present invention, the rear frame is raised to the same height as the upper wall portion at the position of the upper wall portion of the raised portion of the bag-like portion of the side sill. A wall portion (for example, the rear frame horizontal portion 61 in the embodiment) is provided.

  The invention described in claim 5 is characterized in that the bag-like portion includes a reinforcing member (for example, a reinforcing member 63 in the embodiment) for preventing the side sill outer from being crushed to the side sill inner side. And

According to the first aspect of the present invention, when a load is applied to the side surface of the vehicle from the outer side in the vehicle body width direction, the bag-like portion at the rear side of the side sill is moved to the front wall portion even if the rear side door attempts to move inward in the vehicle body width direction. The rear sill functions as a bulkhead to prevent the side sill from deforming, preventing further intrusion of the rear side door, and transmitting the load input from the side sill to the rear frame of the closed cross-section structure. It can be sufficiently received through and supported by the entire vehicle body. Moreover, since the floor panel rigidity is increased, the sound vibration performance can be improved. In addition, since the front wall portion of the bag-like portion functions as a bulkhead, a separate bulkhead conventionally provided in the side sill becomes unnecessary.
According to the first aspect of the present invention, when a load is applied to the side surface of the vehicle from the outside in the vehicle width direction, the bag-like portion at the rear of the side sill is moved forward even if the rear side door attempts to move inward in the vehicle width direction. The wall and the rear wall function as a bulkhead, and the side sill does not deform and catches it to prevent further intrusion of the rear side door, and the load input from the side sill is applied to the rear frame with a closed cross-section structure. It can be transmitted smoothly and continuously, received sufficiently through the cross member, and supported by the entire vehicle body.
Furthermore, according to the invention described in claim 1, since the front part of the wheel arch part which is an existing member is used as the rear wall part forming the bag-like part of the side sill rear part, no separate member is required. Measures can be taken without increasing the number of parts.
According to the invention described in claim 2, when a load is applied to the side surface of the vehicle from the outside in the vehicle body width direction, the door beam provided inside the rear side door is not By pressing the raised part at the rear of the bag-like part, load transmission from the horizontal part reinforced at the upper wall inclined surface of the raised part and the rear wall part to the horizontal part of the rear frame is easily performed, and as a result, the cross member Since the load can be transmitted to the vehicle body, the deformation of the vehicle body can be suppressed by receiving the load in the entire vehicle body.
According to the third aspect of the present invention, when a load acts on the side surface of the vehicle from the outside in the vehicle body width direction, the rear side door moves to the vehicle interior side, and the input load acting from the door beam is applied to the upper wall of the rear portion of the side sill. It can be received in a direction along the upper wall portion which is advantageous in terms of strength.
According to the fourth aspect of the present invention, when a load acts on the side surface of the vehicle from the outside in the vehicle body width direction, the rear side door moves to the vehicle interior side and the input load acting from the door beam is applied to the upper wall portion of the side sill rear portion. The rear frame upper wall portion of the rear frame provided at the same height as the upper wall portion can be received in a direction along the upper wall portion which is advantageous in terms of strength.
According to the invention described in claim 5 , it is possible to prevent the cross-sectional collapse of the bag-like portion of the side sill.

1 is a partial perspective view of a vehicle body according to an embodiment of the present invention. It is a principal part enlarged view of FIG. It is sectional drawing which follows the AA line of FIG. It is a perspective view of a rear part of a side sill outer. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is sectional drawing which follows the DD line | wire of FIG. It is sectional drawing which follows the EE line | wire of FIG. FIG. 3 is a perspective view corresponding to FIG. 2 with a rear side sill outer rear part removed. It is the perspective view seen from the rear part side.

Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a door mounting opening 2 for a front side door and a door mounting opening 4 for a rear side door 3 (not shown) are formed on both sides of the vehicle body 1.
The door attachment opening 4 to which the rear side door 3 is attached is formed by a center pillar 5, a roof side rail 6, a rear pillar 7, a rear wheel arch portion 8 and a side sill 9. Inside the rear side door 3, a pipe-shaped door beam 10 is provided at the lower portion along the longitudinal direction of the vehicle body. In this embodiment, the door beam 10 has a pipe shape, but may be a press product bent into a corrugated plate shape.

Figure 2, as shown in FIG. 3, the side sill 9 at the Ru provided along the longitudinal direction of the vehicle body on both sides of the cabin and both side sill inner 20 and the side sill outer 21 and the upper joint flange 22 and the lower joint flange 23 It is a vehicle body skeleton member formed into a closed cross-sectional structure by bonding.
The side sill outer 21 is divided into a side sill outer front portion 25 and a side sill outer rear portion 26. The side sill inner 20 is also divided into a side sill inner front portion 20F and a side sill inner rear portion 20R corresponding to the side sill outer 21, but the side sill inner 20 except for the case where it is necessary for explanation (FIGS. 5 and 6). Will be described.

As shown in FIGS. 4 to 7, the side sill outer rear portion 26 includes a front wall portion 28 that is bent toward the vehicle interior side at the front end portion of the outer wall portion 27 that faces the vehicle exterior side, and a vehicle interior side at the lower edge of the outer wall portion 27. A lower wall portion 29 that bends inward, a rear end opening portion 32 that opens rearward at the rear end portion of the outer wall portion 27, and an upper wall portion 30 that is bent toward the vehicle interior side at the upper edge of the outer wall portion 27. Yes. The front wall portion 28, the lower wall portion 29, and the upper wall portion 30 are continuous.
The rear portion of the side sill outer rear portion 26 is provided with a bulging portion 34 that protrudes so that the rear portion of the upper wall portion 30 rises with respect to the front portion via the upper wall inclined surface 35, and a horizontal portion that is directed in the vertical direction of the vehicle body above the bulging portion 34. A portion 31 is formed.
A peripheral flange 33 is formed on the periphery of the front wall portion 28, the upper wall portion 30, the lower wall portion 29, and the rear end opening portion 32. Here, since the upper wall portion 30, the outer wall portion 27, and the lower wall portion 29 of the side sill outer front portion 25 are common to the side sill outer rear portion 26, the same portions are denoted by the same reference numerals.

  In the state where the side sill outer rear portion 26 is connected to the side sill inner 20, a rear wheel house extension 40 (configured as a rear wall portion) of the rear wheel arch portion 8 is formed on the peripheral flange 33 of the opened rear end opening portion 32. The rear end opening 32 is closed by being joined. Since the peripheral flange 33 of the front wall portion 28 is joined to the side sill inner front portion 20F as shown in FIG. 6, the front and rear of the closed cross-section structure portion at the rear portion of the side sill 9 are the A bag-like portion 41 is formed between the side sill inner 20 and the wheel house extension 40.

As shown in FIG. 7, on the front side of the side sill 9 (the front side of the lower side portion of the door mounting opening 4), the side edge of the front floor panel 45 is located below the side wall 49 of the side sill inner 20 of the side sill 9. It is joined.
As shown in FIG. 8, the front edge of the stepped floor panel step 46 is connected to the rear edge of the front floor panel 45, and the rear floor panel 47 is connected to the rear edge of the floor panel step 46. A middle cross member 48 is joined to the floor panel step 46 from the back side, and a closed cross-section structure portion H1 is formed on the back side of the floor panel step 46 along the vehicle body width direction.

  As shown in FIGS. 2 and 3, rear frames 55 are attached to both side edges of the rear floor panel 47. The rear frame 55 is a vehicle body skeleton member that extends toward the rear of the vehicle body on the inner side in the vehicle width direction than the side sill 9. The rear frame 55 is joined to the rear floor panel 47 and joined to both ends of the middle cross member 48 at the rear of the side sill 9. Yes. The front end portion of the rear frame 55 is inclined outward in the vehicle body width direction from the connecting portion with the middle cross member 48 and joined to the side wall 49 of the side sill 9.

  Specifically, as shown in FIG. 3, at the rear portion of the side sill 9, the side edge of the rear floor panel 47 is sandwiched between the side edge flange 57 of the rear frame upper 56 and the side edge flange 59 of the rear frame lower 58. The rear frame 55 is joined by forming a closed cross-section structure portion H2. At the front portion of the side sill 9 (the front side of the lower side portion of the door mounting opening 4), as shown in FIG. 2, the connecting portion between the side wall 60 of the floor panel step 46 and the end of the middle cross member 48 (not shown). The rear frame 55 is formed obliquely from the front side to the front side so that the inclined side wall 62 approaches the side sill inner 20, and the flange portion 50 of the rear frame upper 56 is joined to the upper joint flange 22 of the side sill 9 (see FIG. 5). The flange portion 51 of the rear frame lower 58 is joined to the side sill inner 20R of the side sill 9 (see FIG. 2).

Here, the rear frame 55 is raised to substantially the same height as the position of the horizontal portion 31 of the raised portion 34 of the bag-like portion 41 of the side sill 9, and is provided with a horizontal rear frame horizontal portion 61 oriented in the vertical direction of the vehicle body. And connected to the bag-like portion 41 from the inside of the vehicle body.
Further, the height dimension of the rear frame horizontal portion 61 is strictly set to a height dimension in the vicinity of the central portion in the vertical direction of the peripheral flange 33 located at the upper portion of the side sill outer rear portion 26, and the upper joint flange portion 22 of the side sill 9. It is possible to reliably receive the inward load in the vehicle body width direction from the peripheral flange 33 in the direction along the surface of the rear frame horizontal portion 61.

  The raised portion 34 of the bag-like portion 41 of the side sill 9 is opposed to the rear end portion of the door beam 10 disposed in the longitudinal direction of the vehicle body in the rear side door 3 in the vehicle body width direction. As shown, the height position of the horizontal portion 31 of the raised portion 34 is opposed to the height position of the rear end portion of the door beam 10 (between the vertical widths of the rear end of the door beam 10) in the vehicle body width direction.

  As shown in FIGS. 9 and 10, in the side sill inner rear portion 20 </ b> R, the side sill outer rear portion 26 is crushed toward the side sill inner rear portion 20 </ b> R so as to face the wall surface of the side wall 49 in the vehicle body width direction inside the bag-shaped portion 41. A reinforcing member 63 that prevents this is accommodated. The reinforcing member 63 has an upper end joined to the side wall 49 of the side sill inner rear portion 20R, and a lower end sandwiched between the lower joining flanges 23 of the side sill outer rear portion 26 and the side sill inner rear portion 20R. Longitudinal walls 65, 65 are provided at both front and rear edges of the receiving surface 64 extending in the vertical direction and directed outward in the vehicle body width direction. The front vertical wall 65 has a flange 66 on the side wall 49 of the side sill inner rear portion 20R. It is joined. The receiving surface 64 is formed with holes 67 and 68 for adjusting the degree of weight reduction and crushing.

  According to the above embodiment, when a load is applied from the outside in the vehicle body width direction at the time of a vehicle side collision or the like, even if the rear side door 3 attempts to move inward in the vehicle body width direction, The front wall portion 28 and the rear wheel house extension 40 function as a bulkhead, and the side sill 9 is received without being deformed to prevent further intrusion of the rear side door 3, and the load input from the side sill 9 is applied to the rear frame. It can be received and sufficiently supported by the entire vehicle body 1 through the closed cross-section structure portion H1 formed by the middle cross member 48 and the floor panel step portion 46. Moreover, since the floor panel rigidity which consists of the front floor panel 45, the rear floor panel 47, and the floor panel step part 46 increases, sound vibration performance can be improved.

  In particular, when the rear side door 3 is about to move to the vehicle interior side, the door beam 10 provided inside the rear side door 3 is provided at the rear part of the bag-like part 41 at the rear part of the side sill 9 as shown by an arrow in FIG. The raised portion 34 is pressed, load transmission from the horizontal portion 31 reinforced by the upper wall inclined surface 35 of the raised portion 34 and the rear wheel house extension 40 to the rear frame horizontal portion 61 is easily performed, and the rear frame 55 is closed. The vehicle body 1 is transmitted to the front floor panel 45 and the rear floor panel 47 via the closed cross-section structure portion H1 formed by the cross-section structure portion H2, the middle cross member 48 and the floor panel step portion 46. The deformation of the vehicle body 1 can be suppressed by receiving a load.

  Here, the input load acting from the door beam 10 can be received in the direction along the horizontal portion 31 which is advantageous in strength at the horizontal portion 31 of the upper wall portion 30 of the rear portion of the bag-like portion 41 of the rear portion of the side sill 9. Compared to the case where the horizontal portion 31 is displaced in the vertical direction, the horizontal portion 31 is not subjected to bending that is disadvantageous in terms of strength, and the load received from the door beam 10 can be reliably supported.

Also, since in the rear portion of the side sill 9, the side sill outer rear 26, a front wall 28, a rear wheel house extension 40 covering the rear end opening 32, and is the form name a bag-shaped portion 41, The bag-like portion 41 functions as a bulkhead to prevent the side sill 9 from being deformed, and to prevent the side sill 9 from being further intruded, to prevent the rear side door 3 from entering further . It can be smoothly transmitted to the rear frame 55 and the middle cross member 48 that are continuous at H2, and can be sufficiently received and supported. Further, since the front wall portion 28 of the bag-like portion 41 functions as a bulkhead, a separate bulkhead that is conventionally provided in the side sill 9 becomes unnecessary.

  In this case, the rear frame 55 has a rear frame horizontal portion 61 that coincides with the horizontal portion 31 of the upper wall portion 30 of the rear portion of the bag-like portion 41 at the front and rear positions and the height position. Since the height is set in the vicinity of the central portion, it can be received in a direction along the rear frame horizontal portion 61 that is advantageous in strength with respect to the rear frame 55.

Since the rear wheel house extension 40 that constitutes the front part of the rear wheel arch part 8 that is an existing member is used as the rear wall part that forms the bag-like part 41 at the rear part of the side sill 9, no separate member is required. Measures can be taken without increasing the number of parts.
Further, since the reinforcing member 63 is provided in the bag-like portion 41 and the receiving surface 64 is directed outward in the vehicle body width direction, the reinforcing member 63 is supported by the receiving surface 64 on the side sill outer even when the side sill outer rear portion 26 is crushed. Since the penetration of the outer wall portion 27 of the rear portion 26 is suppressed, the collapse of the bag-like portion 41 can be reliably suppressed, and the cross-section collapse of the bag-like portion 41 can be prevented.

The present invention is not limited to the above-described embodiment. For example, the rear wheel house extension 40 constituting the front portion of the rear wheel arch portion 8 is used as a rear wall portion that forms the bag-like portion 41 at the rear portion of the side sill 9. However, as with the front wall portion 28 of the bag-like portion 41, a rear wall portion (not shown) may be formed by bending the rear end portion of the outer wall portion 27 of the side sill outer rear portion 26 toward the vehicle interior side. it can.
Further, as long as the reinforcing member 63 is accommodated in the bag-like portion 41, the flange portion 66 may be joined to the inner surface of the outer wall portion 27 of the side sill outer rear portion 26.

3 Rear side door 4 Door mounting opening 8 Rear wheel arch part (wheel arch part) 9 Side sill 10 Door beam 20 Side sill inner 21 Side sill outer 25 Side sill outer front part 26 Side sill outer rear part 27 Outer wall part 28 Front wall part 29 Lower wall part 30 Upper Wall part 31 Horizontal part (upper wall part ) 32 Rear end opening part 33 Peripheral flange 34 Raised part 40 Rear wheel house extension (rear wall part) 41 Bag-like part 45 Front floor panel (floor panel) 46 Floor panel step part (floor Panel) 47 Rear floor panel (floor panel) 48 Middle cross member (cross member) 49 Side wall 55 Rear frame 61 Rear frame horizontal part (rear frame upper wall part) 63 Reinforcing member

Claims (5)

A bag-like part closed by the front wall part and the rear wall part is formed at the rear part of the side sill that is provided along the vehicle body longitudinal direction on the side part of the passenger compartment and formed with a side sill inner and side sill outer. And a rear frame having a closed cross-sectional structure disposed along the vehicle body longitudinal direction at the rear of the vehicle body and connected to a cross member provided on the floor panel along the vehicle body width direction,
Inclining the front end portion of the rear frame forward in the vehicle width direction from the connecting portion with the cross member, and joining the side sill inner at the front end of the bag-like portion,
The side sill outer of the side sill is divided into a front part of the side sill outer and a rear part of the side sill outer,
The rear portion of the side sill outer includes the front wall portion that bends toward the vehicle interior side at the front end portion of the outer wall portion that faces the vehicle exterior side, and the lower wall portion that bends toward the vehicle interior side at the lower edge of the outer wall portion, the outer wall portion A rear end opening that opens rearward at the rear end, and an upper wall that bends toward the vehicle interior side at the upper edge of the outer wall,
While forming the front wall portion, the lower wall portion and the upper wall portion continuously, forming a peripheral flange joined to the side sill inner on the front wall portion,
With the front part of the wheel arch part of the vehicle body as the rear wall part, the rear end opening of the side sill outer rear part is closed by the front part of the wheel arch part,
A vehicle body side structure according to claim 1 , wherein the bag-like portion is formed between the front wall portion of the rear portion of the side sill outer and the front portion of the wheel arch portion . On the rear side of the bag-like portion at the rear of the side sill, a raised portion is provided that rises rearward along the lower rear end of the door mounting opening of the rear side door, and the raised portion is disposed in the rear side door in the vehicle longitudinal direction. The vehicle body side part structure according to claim 1, wherein the vehicle body side part structure is opposed to a rear end of a door beam disposed along the road.   A horizontal upper wall portion directed in the vertical direction is provided on the upper portion of the raised portion, and the height position of the upper wall portion is opposed to the height position of the rear end portion of the door beam in the vehicle body width direction. The vehicle body side part structure according to claim 2. The rear frame is raised to the same height as the upper wall portion at the position of the upper wall portion of the raised portion of the bag-like portion of the side sill, and a horizontal rear frame upper wall portion is provided here. The vehicle body side part structure according to claim 2 . The vehicle body side part structure according to claim 1, wherein the bag-like portion includes a reinforcing member that prevents the side sill outer from being crushed toward the side sill inner .

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