JP5935762B2 - Body side structure - Google Patents

Description

  The present invention relates to a vehicle body side structure including a side sill extending in the front-rear direction of a vehicle body and a center pillar extending in the vertical direction and joined to the side sill at a lower end.

In recent years, there has been a strong demand for weight reduction of automobiles, and in order to meet this demand, studies have been made to reduce the plate thickness by using a high-strength material for parts, thereby realizing weight reduction.
If the plate thickness of the parts is reduced, the rigidity of the vehicle body is inevitably lowered. Therefore, it is necessary to devise the vehicle body structure in order to increase the rigidity when a material with a thin plate thickness is used.

In the vehicle body side structure, rigidity is particularly important in a joint portion between a side sill extending in the front-rear direction and a center pillar extending in the vertical direction and having a lower end connected to the side sill.
In general, except for a body side panel which is an outer plate, the side sill is formed in a closed cross-sectional shape by a side sill inner and a side sill outer. The center pillar is formed in a closed cross-sectional shape by a center pillar inner and a center pillar outer. The lower part of the center pillar inner is sandwiched and joined between the side sill inner and the side sill outer. In addition, a node-like member may be disposed inside the side sill.

Patent Document 1 proposes a vehicle body side structure in which a node-like member that reinforces the side sill is disposed in a side sill extending in the vehicle longitudinal direction at the lower part of the side surface of the vehicle body.
In Patent Document 1, side collision performance, strength, and rigidity are enhanced by providing a bulkhead that is a node-like member inside a side sill.
However, in the structure of Patent Document 1, the node-like member is disposed not at the center pillar / side sill coupling region but at a position separated from the region in the longitudinal direction of the vehicle body.

  In Patent Document 2, a side sill reinforcing member is disposed between a side sill inner and a side sill outer, and a first node disposed so as to divide the side sill inner or the side sill outer and the side sill reinforcing member in the longitudinal direction of the vehicle body. There has been proposed a vehicle body side structure having a second member that is arranged so as to divide a side member and the other side sill inner or side sill outer and side sill reinforcing member in the longitudinal direction of the vehicle body.

In the vehicle body side structure of Patent Document 2, the first node-like member has a fixed end fixed to the side sill inner or the side sill outer at one end in the vehicle width direction, and the other end in the vehicle width direction. And a free end facing the side sill reinforcing member is formed.
The second node-like member is characterized in that one end in the vehicle width direction is joined to the side sill inner or side sill outer and the other end in the vehicle width direction is joined to the side sill reinforcing member. .
With such a structure, when a load is input to the side sill from the outside of the vehicle body due to a side collision, the load applied to the side sill is transmitted inward in the vehicle width direction through the side sill.

JP 2010-120418 A JP 2007-210367 A

  However, in the vehicle body side structure of Patent Document 1, the bulkhead, which is a node-like member, can prevent the cross-section of the side sill from collapsing, but the bulkhead is disposed outside the coupling region of the side sill and the center pillar. For this reason, the rigidity of the joint portion between the side sill and the center pillar has not been sufficiently improved.

  Further, in the vehicle body side structure of Patent Document 2, one end of the first node-like member is not joined to a side sill reinforcing member such as a center pillar inner, and does not function as a member for improving rigidity. Further, the knot-like member is composed of two parts, a first knot-like member and a second knot-like member, and there is a problem that the number of parts increases.

  The present invention has been made to solve such problems, and an object of the present invention is to provide a vehicle body side structure that can improve rigidity while suppressing the number of parts.

(1) A vehicle body side structure according to the present invention is installed in a side sill extending in the front-rear direction of the vehicle body, a center pillar extending in the vertical direction and joined to the side sill at the lower end, and the side sill. A vehicle body side structure comprising a nodular member made of a plate body,
The side sill comprises a side sill outer made of a hat cross-section member having a flange portion at the top and bottom, and a side sill inner made of a hat cross-section member having a flange portion at the top and bottom,
The center pillar comprises a center pillar outer and a center pillar inner,
The lower end of the center pillar outer is joined to the outer surface of the vertical wall of the side sill outer,
The lower end portion of the center pillar inner is formed of a flat plate, and has a bent piece portion that bends toward the vehicle inner side or the vehicle outer side at both ends of the flat plate in the vehicle longitudinal direction, and the flat plate is disposed between the side sill outer and the side sill inner. Being joined to the upper and lower flange portions of the side sill outer and the side sill inner,
The nodular members are respectively disposed with a flat plate at the lower end of the center pillar inner in the inner space of the side sill sandwiched from the front and rear of the vehicle body, and each nodular member is the bent piece of the flat plate at the lower end of the center pillar inner. And the upper surface, the side surface, and the lower surface of the side sill outer.

(2) Moreover, the thing as described in said (1) WHEREIN: The said node-shaped member is joined to the said side sill inner, It is characterized by the above-mentioned.

(3) The vehicle body side structure according to the present invention includes a side sill extending in the front-rear direction of the vehicle body, a center pillar extending in the vertical direction and joined to the side sill at the lower end, and inside the side sill. A vehicle body side structure comprising a node-like member made of a plate body to be installed,
The side sill comprises a side sill outer made of a hat cross-section member having a flange portion at the top and bottom, and a side sill inner made of a hat cross-section member having a flange portion at the top and bottom,
The center pillar comprises a center pillar outer and a center pillar inner,
The lower end of the center pillar outer is joined to the outer surface of the vertical wall of the side sill outer,
The lower end portion of the center pillar inner is formed of a flat plate, and has a bent piece portion that bends toward the vehicle inner side or the vehicle outer side at both ends of the flat plate in the vehicle longitudinal direction, and the flat plate is disposed between the side sill outer and the side sill inner. Being joined to the upper and lower flange portions of the side sill outer and the side sill inner,
The nodular members are respectively arranged by sandwiching a flat plate at the lower end of the center pillar inner in the inner space of the side sill from the front and rear of the vehicle body, and each nodular member is the bent piece portion of the flat plate below the center pillar inner, The side sill outer is joined to the side of the side sill outer and the side of the side sill inner, respectively.

  In the present invention, the node-like members are respectively arranged on the front and rear sides of the vehicle body sandwiching the lower end portion of the center pillar inner in the inner space of the side sill, and each node-like member is provided on the lower portion of the center pillar inner, the upper surface, the side surface and the lower surface of the side sill outer. By being joined together, the rigidity of the vehicle body side portion can be improved while suppressing an increase in the number of components.

It is a perspective view of the vehicle body side part structure concerning one embodiment of the present invention, and shows the state seen from the vehicle inside in the state where the side sill inner was removed. It is a perspective view of the vehicle body side part structure concerning one embodiment of the present invention. It is a perspective view of the vehicle body side part structure which concerns on other embodiment of this invention, and has shown the state seen from the vehicle inner side in the state which removed the side sill inner. It is a perspective view of the vehicle body side part structure which concerns on other embodiment of this invention, and has shown the state seen from the vehicle inner side in the state which removed the side sill inner. It is explanatory drawing of an example of the test body for confirming the effect of the vehicle body side part structure which concerns on this invention, and the rigidity test method using this test body. It is a perspective view of the vehicle body side part structure as a comparative example for confirming the effect of the vehicle body side part structure which concerns on this invention, and has shown the state seen from the vehicle inner side in the state which removed the side sill inner. It is a perspective view of the vehicle body side part structure as another comparative example for confirming the effect of the vehicle body side part structure which concerns on this invention, and has shown the state seen from the vehicle inner side in the state which removed the side sill inner. It is a graph which shows a rigidity test result.

[Embodiment 1]
As shown in FIGS. 1 and 2, a vehicle body side structure 1 according to an embodiment of the present invention includes a side sill 5 extending in the front-rear direction of the vehicle body, and a side sill 5 extending in the vertical direction at the lower end. A center pillar 3 to be joined and a node-like member 9 made of a plate body installed inside the side sill 5 are provided.
Hereinafter, each configuration will be described in detail.

<Side sill>
The side sill 5 includes a side sill outer 11 made of a hat cross-section member having an upper surface portion 11a, a side surface portion 11b, a lower surface portion 11c, an upper flange portion 11d, and a lower flange portion 11e, and similarly, an upper surface portion 13a, a side surface portion 13b, and a lower surface portion. A side sill inner 13 having a hat-shaped cross section in the axial direction and having a 13c, an upper flange portion 13d, and a lower flange portion 13e is provided (see FIG. 2).
The side sill 5 has an inner space 7 defined by these parts, with the side sill outer 11 disposed on the vehicle exterior and the side sill inner 13 disposed on the vehicle interior.
FIG. 1 is a perspective view of the state in which the side sill inner 13 is removed as viewed from the inside of the vehicle.

<Center pillar>
The center pillar 3 includes a center pillar outer 15 made of a hat-shaped cross-sectional member having a flange portion 15a, and a center pillar inner 17 made of a hat-shaped cross-sectional member similarly having a flange portion 17a.
The center pillar 3 is formed in a cylindrical shape by joining the flange portion 15 a of the center pillar outer 15 and the flange portion 17 a of the center pillar inner 17.

The lower end portion of the center pillar outer 15 is joined to the outer surface of the side surface portion 11 b of the side sill outer 11.
The lower end portion 17b of the center pillar inner 17 is a flat plate, and the length of the lower end portion 17b is set so as to extend from the upper flange portion 11d of the side sill outer 11 to the lower flange portion 11e. Further, at both ends of the lower end portion 17b in the longitudinal direction of the vehicle body, bent piece portions 19 that are bent inward from the both ends are provided. The bent piece portion 19 may be bent outward of the vehicle.
The lower end portion 17b of the center pillar inner 17 is disposed so as to be sandwiched between the side sill outer 11 and the side sill inner 13, and the outer surface of the lower end portion 17b is joined to the upper flange portion 11d and the lower flange portion 11e of the side sill outer 11. The inner surface of the vehicle is joined to the upper flange portion 13d and the lower flange portion 13e of the side sill inner 13.

<Nodal member>
As shown in FIG. 1, the node-like member 9 is formed of a rectangular plate body having a size substantially the same as the shape of the internal space 7 of the side sill 5, and is joined to the upper surface portion 11 a of the side sill outer 11. An upper bent piece portion (not shown), an outer bent piece portion 9a for bonding to the side surface portion 11b, and a lower bent piece portion 9b for bonding to the lower surface portion 11c.
The node-like members 9 are respectively arranged on the front and rear sides of the vehicle body across the lower end portion 17b of the center pillar inner 17 in the inner space 7 of the side sill 5, and each node-like member 9 has a center pillar inner 17 side surface on the center pillar inner 17 side. The upper bent piece portion is on the upper surface (upper surface portion 11a) of the side sill outer 11, the outer bent piece portion 9a is on the side surface (side surface portion 11b), and the lower bent piece portion 9b is the lower surface (lower surface portion 11c). Are joined to each other. Thus, the node-like member 9 partitions the internal space 7 of the side sill 5 in the front-rear direction with a vertical surface.

  As described above, the node-like member 9 is bonded to the side sill outer 11 at its three sides, thereby preventing the node-like member 9 from moving or deforming when an external force is applied. And the rigidity of the junction part of the center pillar 3 and the side sill 5 is improving by joining the lower end part 17b of the center pillar inner 17 to the node-shaped member 9 from which the movement and the deformation | transformation were prevented.

The operation of the vehicle body side part structure 1 configured as described above will be described.
When a load is applied from the side sill outer 11 side, the node-like member 9 prevents the side sill 5 from being deformed, thereby increasing the rigidity of the vehicle body side part structure 1.
Further, when a load is applied to the center pillar 3 from the side of the vehicle body, the portion of the center pillar 3 to which the load is applied receives a force toward the vehicle interior. At this time, the lower end portion 17b of the center pillar inner 17 has a lower end portion. The force which raises 17b acts.
However, the center pillar inner 17 has its lower end portion 17b joined to the node-like member 9, and the node-like member 9 has its three sides joined to the side sill outer 11 , so that the center pillar inner 17 is The pulling force can be sufficiently resisted, and therefore deformation of the center pillar inner 17 is prevented.
Thus, the vehicle body side part structure 1 of the present embodiment can exhibit high rigidity even when a load is applied to either the side sill outer 11 or the center pillar outer 15.

[Embodiment 2]
Next, a vehicle body side structure 21 according to another embodiment of the present invention will be described with reference to FIG.
FIG. 3 is a perspective view of the vehicle body side structure 21 with the side sill inner 13 removed. In FIG. 3, the same reference numerals are given to the same components as those in the first embodiment.
The vehicle body side structure 21 of the present embodiment has an inner bent piece portion 9 c for joining the node-like member 9 to the side surface portion 13 b of the side sill inner 13, and the node-like member 9 is formed only by the side sill outer 11. There is a feature in that it is joined to the side sill inner 13.

  In the present embodiment, the knot-like member 9 is joined to the side sill inner 13 in addition to the three surfaces of the side sill outer 11, so that the movement and deformation of the knot-like member 9 can be surely prevented. 21 can be further increased in rigidity.

  In the example shown in FIG. 3, an example in which the node-like member 9 is joined to the side surface portion 13 b of the side sill inner 13 is shown. There may be at least one of the upper surface portion 13a, the side surface portion 13b, and the lower surface portion 13c.

[Embodiment 3]
Next, a vehicle body side structure 23 according to still another embodiment of the present invention will be described with reference to FIG.
FIG. 4 is a perspective view of the vehicle body side structure 23 with the side sill inner 13 removed. In FIG. 4, the same components as those in the first and second embodiments are denoted by the same reference numerals.

In the vehicle body side structure 23 according to the present embodiment, the node-like members 9 are respectively arranged on the front and rear sides of the vehicle body sandwiching the lower end portion 17b of the center pillar inner 17 in the inner space 7 of the side sill 5, and the bent piece portion of the center pillar inner 17 is provided. The point joined to 19 is the same as in the first and second embodiments.
However, the joint between the node-like member 9 and the side sill 5 is different from the other embodiments in that the side sill 11 of the side sill outer 11 and the side 13b of the side sill inner 13 are joined.

As shown in FIG. 4, the node-like member 9 includes an outer bent piece portion 9 a for bonding to the side surface portion 11 b of the side sill outer 11, and an inner bent piece portion 9 c for bonding to the side surface portion 13 b of the side sill inner 13. have.
In this way, by joining the node-like member 9 to the side surface portion 11b of the side sill outer 11 and the side surface portion 13b of the side sill inner 13, the node-like member 9 can be securely fixed to the side sill 5, thereby the above-described embodiment. Similar to 1 and 2, the rigidity of the vehicle body side structure 23 can be increased.
Moreover, in this Embodiment, since the joining location of the node-shaped member 9 is two places, the side part 11b of the side sill outer 11, and the side part 13b of the side sill inner 13, there are few joining parts and it says that an assembly is easy. The effect is obtained.

In the first to third embodiments, the shape of the node-like member 9 has been described by taking a rectangular shape as an example. However, the shape of the node-like member 9 is not limited to a rectangle, and may be a trapezoid or the like. Further, a hole may be formed in a part of the node-like member 9 in order to reduce the weight. Thus, various shapes can be applied to the node-like member 9.
Further, the node-like members 9 do not have to have the same shape, and may have different shapes depending on ease of assembly and attachment position.

Since the rigidity test of the vehicle body side part structure 1, the vehicle body side part structure 21, and the vehicle body side part structure 23 according to the first to third embodiments was performed, this will be described.
In the stiffness test, a test body is created for each vehicle body side structure, a load is applied to each test body, a rigidity value is obtained, and each rigidity value is evaluated.
FIG. 5 shows a test body 24 for the vehicle body side structure 1 as an example of the test body. In FIG. 5, the reference numerals indicating the respective parts of the test body 24 are the same as those in FIGS. 1 and 2.

  The rigidity test assumes a collision (side collision) against the center pillar 3 from the side of the vehicle body. Both the front and rear end surfaces of the side sill 5 are fixed, and the upper end of the center pillar 3 is fixed as shown in FIG. Thus, the load is applied in the vehicle width direction (see arrow Fy in FIG. 5) from the outside of the vehicle.

6 and 7 are explanatory views of a vehicle body side part structure as a comparative example. 6 and 7 are perspective views of the state in which the side sill inner 13 is removed as viewed from the inside of the vehicle.
In the vehicle body side structure 25 shown in FIG. 6, the node-like member 9 is joined to the upper surface portion 11 a, the side surface portion 11 b and the lower surface portion 11 c of the side sill outer 11, but not joined to the center pillar inner 17.
Further, in the vehicle body side structure 27 shown in FIG. 7, the center pillar inner 17 is joined to the node-like member 9 through the bent piece portion 19, but the node-like member 9 and the side sill 5 are the side sill outer 11. It joins only in the side part 11b.
6 and 7, the same reference numerals are assigned to the same parts as those of the vehicle body side structure 1, the vehicle body side structure 21, and the vehicle body side structure 23.
And the test body was created about these comparative examples, and the same rigidity test was done.

  FIG. 8 shows a comparison result of the rigidity values of the respective specimens by the rigidity test. FIG. 8 shows the rigidity ratio of each test body based on the rigidity value of the test body (Comparative Example 1) created for the vehicle body side structure 25. In FIG. 8, Comparative Example 2 is a test specimen prepared for the vehicle body side part structure 27, Invention Example 1 is a test specimen prepared for the vehicle body side part structure 21, and Invention Example 2 is prepared for the vehicle body side part structure 1 described above. The test body 24 and Invention Example 3 represent the rigidity ratio of the test body prepared for the vehicle body side structure 23, respectively.

As shown in FIG. 8, it was confirmed that the rigidity was significantly improved in Invention Examples 1 to 3 to which the present invention was applied.
As described above, the inventive examples 1 to 3 are highly rigid for the following reason. In the vehicle body side structure 1, the vehicle body side structure 21, and the vehicle body side structure 23, the node member 9 is joined to other members so as to have high rigidity in the vertical direction. Since the center pillar inner 17 is joined, it is considered that, as a result, the movement and deformation of the center pillar inner 17 are suppressed, and the entire side structure becomes highly rigid.

  On the other hand, in the vehicle body side structure 25, the center pillar inner 17 is not joined to the node-like member 9 in the first place, and the action of suppressing the movement and deformation of the center pillar inner 17 is small. Further, in the vehicle body side structure 27, although the center pillar inner 17 is joined to the node-like member 9, there is only one place (outer bent piece portion 9a) where the node-like member 9 is joined to the side sill 5. It is considered that high rigidity cannot be obtained because the node-like member 9 itself moves and deforms due to the stress acting from the pillar inner 17.

DESCRIPTION OF SYMBOLS 1 Car body side part structure 3 Center pillar 5 Side sill 7 Internal space 9 Node-like member 9a Outer bending piece part 9b Lower bending piece part 9c Inner bending piece part 11 Side sill outer 11a Upper surface part 11b Side surface part 11c Lower surface part 11d Upper flange part 11e Below Flange portion 13 Side sill inner 13a Upper surface portion 13b Side surface portion 13c Lower surface portion 13d Upper flange portion 13e Lower flange portion 15 Center pillar outer 15a Flange portion 17 Center pillar inner 17a Flange portion 17b Lower end portion 19 Bending piece portion 21 Body side structure 23 Vehicle body Side structure 24 Test body 25 Car body side structure 27 Car body side structure

Claims (3)

A side sill extending in the front-rear direction of the vehicle body, a center pillar extending in the up-down direction and joined to the side sill at the lower end, and a node-like member made of a plate body installed inside the side sill. A vehicle body side structure,
The side sill comprises a side sill outer made of a hat cross-section member having a flange portion at the top and bottom, and a side sill inner made of a hat cross-section member having a flange portion at the top and bottom,
The center pillar comprises a center pillar outer and a center pillar inner,
The lower end of the center pillar outer is joined to the outer surface of the vertical wall of the side sill outer,
The lower end portion of the center pillar inner is formed of a flat plate, and has a bent piece portion that bends toward the vehicle inner side or the vehicle outer side at both ends of the flat plate in the vehicle longitudinal direction, and the flat plate is disposed between the side sill outer and the side sill inner. Being joined to the upper and lower flange portions of the side sill outer and the side sill inner,
The nodular members are respectively disposed with a flat plate at the lower end of the center pillar inner in the inner space of the side sill sandwiched from the front and rear of the vehicle body, and each nodular member is the bent piece of the flat plate at the lower end of the center pillar inner. The vehicle body side part structure is joined to the upper surface, the side surface, and the lower surface of the side sill outer.   The vehicle body side part structure according to claim 1, wherein the node-like member is joined to the side sill inner. A side sill extending in the front-rear direction of the vehicle body, a center pillar extending in the up-down direction and joined to the side sill at the lower end, and a node-like member made of a plate body installed inside the side sill. A vehicle body side structure,
The side sill comprises a side sill outer made of a hat cross-section member having a flange portion at the top and bottom, and a side sill inner made of a hat cross-section member having a flange portion at the top and bottom,
The center pillar comprises a center pillar outer and a center pillar inner,
The lower end of the center pillar outer is joined to the outer surface of the vertical wall of the side sill outer,
The lower end portion of the center pillar inner is formed of a flat plate, and has a bent piece portion that bends toward the vehicle inner side or the vehicle outer side at both ends of the flat plate in the vehicle longitudinal direction, and the flat plate is disposed between the side sill outer and the side sill inner. Being joined to the upper and lower flange portions of the side sill outer and the side sill inner,
The nodular members are respectively arranged by sandwiching a flat plate at the lower end of the center pillar inner in the inner space of the side sill from the front and rear of the vehicle body, and each nodular member is the bent piece portion of the flat plate below the center pillar inner, The vehicle body side part structure is joined to a side surface of the side sill outer and a side surface of the side sill inner, respectively.

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