KR20210122574A - Vehicle side structure - Google Patents

Abstract

A side structure for a vehicle in accordance with an embodiment of the present invention comprises an inner side assembly and an outer side assembly, wherein the inner side assembly includes: an inner roof side member; an inner upper front pillar connected to a front end of the inner roof side member; an inner lower front pillar coupled to a front end of the inner upper front pillar; a first inner center pillar coupled to a lower edge of the inner upper front pillar; a second inner center pillar coupled to an indoor surface of the first inner center pillar; and a center pillar reinforcement material coupled to the outer surface of the first inner center pillar, and the outer side assembly includes: an outer side member having an outer roof side unit extending along a side edge of a vehicle roof and an outer upper front pillar extending obliquely from the outer roof side unit; a side reinforcement material coupled to an indoor surface of the outer side member; an outer lower center pillar coupled to the front end of the outer roof side member; and an outer center pillar coupled to a lower edge of the outer roof side member. The outer center pillar may have an upper end joint unit coupled to the outer side member, and the upper end joint unit of the outer center pillar may be coupled to an indoor surface of the outer roof side unit. The present invention can reinforce collision performance and firmness.

Description

Vehicle side structure {VEHICLE SIDE STRUCTURE}

The present invention relates to a side structure for a vehicle, and more particularly, to a side structure for a vehicle capable of reinforcing collision performance and rigidity by reinforcing connectivity to a joint portion of a front pillar and a joint portion of a center pillar.

In recent years, as the awareness of the environment and the depletion of petroleum resources increases, eco-friendly vehicles such as electric vehicles and hybrid electric vehicles have been highlighted. Electric vehicles and hybrid vehicles have a battery mounted on the lower part of the vehicle body. Accordingly, the weight of the electric vehicle and hybrid vehicle increases compared to an internal combustion engine vehicle (a vehicle equipped with only an internal combustion engine) due to a relatively heavy battery. For example, under the same specification conditions, the weight of the electric vehicle is about 200 kg greater than the weight of the internal combustion engine vehicle, and the weight of the hybrid vehicle is about 120 kg greater than the weight of the internal combustion engine vehicle under the same specification conditions.

As described above, as the weight of electric vehicles and hybrid vehicles increases compared to internal combustion engine vehicles, roof strength and small overlap (frontal offset collision) may be relatively lowered. Therefore, electric vehicles and hybrid vehicles have ceiling strength It is necessary to develop a structure for improving small overlap (frontal offset collision) and the like.

In addition, in electric vehicles and hybrid vehicles, a front pillar garnish may be mounted on the front pillar in order to efficiently implement the exterior design of the vehicle, and since the cross section of the vehicle side structure is reduced due to the front pillar garnish, the vehicle side The rigidity of the structure and the stiffness of the joint part of the front pillar and the joint part of the center pillar become weak, and the joint part of the front pillar and the joint part of the center pillar are excessively bent when a vehicle crash occurs. there was.

Matters described in this background section are prepared to enhance understanding of the background of the invention, and may include matters that are not already known to those of ordinary skill in the art to which this technology belongs.

The present invention has been devised in consideration of the above points, and an object of the present invention is to provide a side structure for a vehicle capable of strengthening collision performance and rigidity by strengthening the connectivity to the joint part of the front pillar and the joint part of the center pillar. have.

A side structure for a vehicle according to an embodiment of the present invention for achieving the above object includes an inner roof side member, an inner upper front pillar connected to a front end of the inner roof side member, and a front end of the inner upper front pillar an inner lower front pillar coupled to, a first inner center pillar coupled to a lower edge of the inner upper front pillar, a second inner center pillar coupled to an interior surface of the first inner center pillar, and the first inner an inner side assembly including a center pillar reinforcing material coupled to the outer surface of the center pillar; and an outer side member having an outer roof side portion extending along a side edge of the vehicle roof and an outer upper front pillar extending obliquely from the outer roof side portion, and a side reinforcement coupled to an interior surface of the outer side member; and an outer side assembly including an outer lower center pillar coupled to a front end of the outer roof side member and an outer center pillar coupled to a lower edge of the outer roof side member. The outer center pillar may have an upper joint portion coupled to the outer intermember, and the upper joint portion of the outer center pillar may be coupled to an interior surface of the outer roof side portion.

The upper joint portion may be integrally connected to the outer center pillar.

The upper joint part has a "C"-shaped cross section, the outer roof side part has a "C"-shaped cross section, and the "C"-shaped cross section of the upper joint part is coupled to the "C"-shaped cross section of the outer roof side part through welding. can be

The outer roof side part has a first mounting part integrally formed thereunder, the outer center pillar has a second mounting part coupled to the first mounting part, and the upper joint part is integrated with the outer center pillar through the second mounting part connected to, the center pillar reinforcing material has an upper end extension coupled to the second mounting portion, the upper end extension of the center pillar reinforcing material is coupled to the interior surface of the second mounting portion, and the first mounting portion is the second mounting portion It can be coupled to the outdoor surface.

The center pillar reinforcing material may have a "U"-shaped cross-section, and the center pillar reinforcing material may be coupled to an interior surface of the first inner center pillar.

The first inner center pillar may have a “W”-shaped cross section, and edge side flanges of the first inner center pillar may be coupled to an edge side flange of the outer center pillar.

The side reinforcement may include a roof-side reinforcement coupled to the outer roof-side portion and a front pillar-side reinforcement coupled to the outer upper front pillar. The roof-side reinforcing portion may have a “C”-shaped cross-section, and the “C”-shaped cross-section of the roof-side reinforcing portion may be coupled to the “C”-shaped cross-section of the outer roof side portion through welding.

The roof-side reinforcement portion has a rear extension coupled to the upper joint portion of the outer center pillar, the rear extension portion has a “C”-shaped cross-section, and the “C”-shaped cross-section of the rear extension portion of the upper joint portion through welding It is coupled to a “C”-shaped cross-section, and the “C”-shaped cross-section of the upper joint portion may be coupled to a “C”-shaped cross-section of the outer roof side portion through welding.

The inner lower front pillar has a cutout formed on an inner periphery of the outdoor wall adjacent to the door opening, and a front pillar reinforcement is mounted to cover the cutout of the inner lower front pillar, and the front pillar reinforcement is part of the outer line of the door opening. The front pillar reinforcing material may include an inclined reinforcing rib, extending parallel to, and having an upper extension coupled to a lower end of the inner lower front pillar.

The front pillar reinforcement may have a first mounting bead to which a cockpit cowl cross bar is mounted, and the inner lower front pillar may have a second mounting bead to which a curtain airbag is mounted.

According to the present invention, collision performance and rigidity can be strengthened by reinforcing the connection between the joint part of the front pillar and the joint part of the center pillar, and in particular, the structure for counteracting the ceiling strength and small overlap frontal collision is better than that of the prior art. Since the thickness can be reduced, the weight saving effect is high.

In addition, the bending phenomenon of the joint portion of the front pillar and the joint portion of the center pillar when a vehicle crash occurs can be minimized, and the design of the garnish mounted on the front pillar can be more flexibly supported.

1 is an exploded perspective view showing a side structure for a vehicle according to an embodiment of the present invention.
2 is an exploded perspective view illustrating an outer roof side portion and an outer center pillar of a side structure for a vehicle according to an embodiment of the present invention.
3 is an enlarged exploded perspective view of the upper joint portion of the outer roof side portion and the outer center pillar shown in FIG. 2 .
4 is a perspective view illustrating a structure in which the upper joint portion of the outer roof side portion and the outer center pillar shown in FIG. 3 are combined.
FIG. 5 is a cross-sectional view taken along line AA of FIG. 4 .
6 is a view of a structure in which an outer roof side portion of a side structure for a vehicle and an upper joint portion of an outer center pillar are combined according to an embodiment of the present invention as viewed from the outside of the vehicle.
FIG. 7 is a cross-sectional view taken along line BB of FIG. 6 .
FIG. 8 is a cross-sectional view taken along line CC of FIG. 6 .
9 is a view showing an inner roof side member, a first inner center pillar, a second inner center pillar, a center pillar reinforcement, and a roof side reinforcement part of the side reinforcement in the side structure for a vehicle according to an embodiment of the present invention.
10 is a perspective view of a structure in which a roof side reinforcement portion of a side reinforcement member is coupled to an outer center pillar in a vehicle side structure according to an embodiment of the present invention as viewed from the exterior side of the vehicle.
11 is a perspective view of a structure in which an outer center pillar, a center pillar reinforcement, and a roof side reinforcement of the side reinforcement are connected in the side structure for a vehicle according to an embodiment of the present invention, as viewed from the inside of the vehicle.
12 is a cross-sectional view taken along line DD of FIG. 11 .
13 is a cross-sectional view taken along line EE of FIG. 11 .
14 is a view of a structure in which the inner lower front pillar and the front pillar reinforcement are coupled to the inner upper front pillar in the side structure for a vehicle according to an embodiment of the present invention as viewed from the inside of the vehicle.
15 is a cross-sectional view taken along line FF of FIG. 14 .
16 is a view of a structure in which a cockpit cowl cross bar and a curtain airbag are mounted on an inner lower front pillar and a front pillar reinforcement of a side structure for a vehicle according to an embodiment of the present invention as viewed from the inside of the vehicle.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment of the present invention, the detailed description thereof will be omitted.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the components from other components, and the essence, order, or order of the components are not limited by the terms. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

1 , the vehicle side structure 10 may include an inner side assembly 11 facing toward the interior of the vehicle and an outer side assembly 12 facing toward the exterior of the vehicle. have. In addition, the vehicle side structure 10 may have a door opening 5 to which a vehicle door is mounted, and the door opening 5 may be limited by a roof side, a front pillar, a center pillar, and the like.

The inner side assembly 11 includes an inner roof side member 21 , an inner upper front pillar 41 connected to the front end of the inner roof side member 21 , and an inner upper front pillar 41 . It may include an inner lower front pillar 42 coupled to the front end, and a first inner center pillar 31 coupled to the lower edge of the inner roof side member 21 . .

The inner roof side member 21 may extend along the side edge of the vehicle roof, and in particular, the inner roof side member 21 may extend along the longitudinal direction of the vehicle. The front end of the inner roof side member 21 may face toward the front of the vehicle, and the rear end of the inner roof side member 21 may face toward the rear of the vehicle. The inner roof side member 21 may have a mounting seat surface 23 to which the upper end of the first inner center pillar 31 is coupled.

The inner upper front pillar 41 may extend downwardly inclined toward the front of the vehicle. In particular, the rear end of the inner upper front pillar 41 may be coupled to the front end of the inner roof side member 21 through a fastener, welding, or the like.

The inner lower front pillar 42 may extend along the height direction of the vehicle, and the inner lower front pillar 42 may be coupled to the front end of the inner upper front pillar 41 through fasteners, welding, or the like. The front pillar reinforcing material 46 may be coupled to the inner periphery of the inner lower front pillar 42 through fasteners, welding, etc., and the inner periphery of the inner lower front pillar 42 may be adjacent to the door opening 5 . have. The front pillar reinforcement 46 may be configured to reinforce mounting rigidity of accessories such as the cockpit cowl crossbar 8 and the curtain airbag 9 .

The first inner center pillar 31 may have an upper mounting portion 31a coupled to the mounting seat surface 23 of the inner roof side member 21 through fasteners, welding, or the like. The first inner center pillar 31 may have an indoor surface facing toward the indoor space of the vehicle and an outdoor surface facing toward the outdoor space of the vehicle.

The second inner center pillar 32 may have an indoor surface facing toward the indoor space of the vehicle and an outdoor surface facing toward the outdoor space of the vehicle. The second inner center pillar 32 may have a length corresponding to the length of the outer center pillar 60 to be described later. The second inner center pillar 32 may have an upper region 32a and a lower region 32b. The outdoor surface of the upper region 32a of the second inner center pillar 32 may be coupled to the indoor surface of the first inner center pillar 31 through fasteners, welding, or the like. In this way, the upper region 32a of the second inner center pillar 32 is firmly coupled to the first inner center pillar 31 so that the rigidity of the inner center pillar assembly 30 can be strengthened.

The first inner center pillar 31 may have a length corresponding to the upper region 32a of the second inner center pillar 32 . For example, the length of the first inner center pillar 31 may correspond to half the length of the second inner center pillar 32 .

The center pillar reinforcing material 33 may have an indoor surface facing toward the indoor space of the vehicle and an outdoor surface facing toward the outdoor space of the vehicle. The length of the center pillar reinforcement 33 is longer than the length of the first inner center pillar 31 and shorter than the length of the second inner center pillar 32 . The interior surface of the center pillar reinforcement 33 may be coupled to the exterior surface of the first inner center pillar 31 through fasteners, welding, or the like. The center pillar reinforcing material 33 may be coupled to the outdoor surface of the first inner center pillar 31 and the outdoor surface of the second inner center pillar 32 through fasteners, welding, or the like.

Referring to FIG. 1 , the outer side assembly 12 includes an outer roof-side member 50 , a side reinforcement 55 coupled to the interior surface of the outer side member 50 , and an outer side member It may include an outer lower front pillar 44 coupled to the front end of the 50 , and an outer center pillar 60 coupled to a lower edge of the outer side member 50 .

The outer side member 50 may have an indoor surface facing toward the interior of the vehicle and an exterior surface facing toward the exterior of the vehicle. The outer side member 50 includes an outer roof side portion 51 extending along the side edge of the vehicle roof and an outer upper front pillar 43 extending downwardly from the front end of the outer roof side portion 51 toward the front of the vehicle. ) may be included. The outer roof side portion 51 may extend along the longitudinal direction of the vehicle roof, and in particular, the outer roof side portion 51 may have a shape corresponding to the inner roof side member 21 . The outer upper front pillar 43 may extend downwardly in the longitudinal direction of the inner upper front pillar 41 , and the outer upper front pillar 43 may have a shape corresponding to the inner upper front pillar 41 . . According to an example, as shown in FIG. 1 , the outer upper front filler 43 may be integrally processed with respect to the outer roof side portion 51 through a press process such as hot stamping. That is, the outer upper front filler 43 and the outer roof side portion 51 may be configured as a unitary one-piece structure. According to another example, the outer upper front pillar 43 may be manufactured separately from the outer roof side portion 51 , and thus the outer upper front pillar 43 may be formed with the outer roof side portion 51 through fasteners, welding, etc. ) can be coupled to the front end of

The side reinforcement 55 may have an interior surface facing toward the interior of the vehicle and an exterior surface facing toward the exterior of the vehicle. The side reinforcement 55 includes a roof-side reinforcement portion 56 extending along the side edge of the vehicle roof and a front pillar-side reinforcement portion 45 extending downwardly from the front end of the roof-side reinforcement portion 56 toward the front of the vehicle. ) may be included. The outdoor surface of the roof-side reinforcement portion 56 may be coupled to the interior surface of the outer roof-side portion 51 through fasteners, welding, etc. It may be coupled to the interior surface of the outer upper front filler 43 through the back. According to an example, as shown in FIG. 1 , the front pillar-side reinforcing part 45 may be integrally processed with respect to the roof-side reinforcing part 56 through a press process such as hot stamping. That is, the front pillar-side reinforcing part 45 and the roof-side reinforcing part 56 may be configured as a unitary one-piece structure. According to another example, the front pillar-side reinforcing part 45 may be manufactured separately from the roof-side reinforcing part 56 , and thus the front pillar-side reinforcing part 45 may be formed as a roof-side reinforcing part through fasteners, welding, or the like. It may be coupled to the front end of (56).

The outer lower front pillar 44 may extend along the height direction of the vehicle, and the upper end of the outer lower front pillar 44 may be coupled to the front end of the outer upper front pillar 43 through fasteners, welding, etc. have.

The first inner center pillar 31 , the second inner center pillar 32 , the center pillar reinforcing material 33 , and the outer center pillar 60 may constitute the center pillar. The inner roof side member 21 , the roof side reinforcement portion 56 of the side reinforcement member 55 , and the outer roof side portion 51 of the outer side member 50 may constitute a roof side. The inner upper front pillar 41 , the front pillar side reinforcement 45 of the side reinforcement 55 , and the outer upper front pillar 43 may constitute the upper front pillar. The inner lower front filler 42 , the front filler reinforcing material 46 , and the outer lower front filler 44 may constitute the lower front filler.

3 to 5, the outer roof side portion 51 includes an outdoor wall 81 facing the outside of the vehicle, an outer upper wall 82 inclined upward from the upper end of the outdoor wall 81, It may include an outer lower wall 83 inclined downward from the lower end of the outdoor wall 81 . Accordingly, at least a portion of the roof side portion 51 may have a “C”-shaped cross section formed by the outdoor wall 81 , the outer upper wall 82 , and the outer lower wall 83 .

The outer roof side part 51 may include a first mounting part 70 integrally formed on the outer lower wall 83 , and the first mounting part 70 may include a first mounting wall 71 facing the exterior of the vehicle. ), a first front-side mounting wall 72 extending from the first mounting wall 71 toward the front of the vehicle, and a first rear-side mounting wall extending from the first mounting wall 71 toward the rear of the vehicle (73) can have. The first mounting wall 71 may be formed to be flat, and the first front side mounting wall 72 may be connected obliquely from the first mounting wall 71 toward the front of the vehicle, and the first rear side mounting wall ( 73 may be inclinedly connected from the first mounting wall 71 toward the rear of the vehicle. The upper end of the outer center pillar 60 may be coupled to the interior surface of the outer roof side portion 51 and the interior surface of the first mounting portion 70 .

The outer center pillar 60 may have an upper joint portion 61 coupled to a lower edge of the outer side member 50 and a lower joint portion 62 coupled to a side sill (not shown).

The upper joint portion 61 includes an interior wall 85 facing toward the interior of the vehicle, an inner upper wall 86 inclined upward from the upper end of the interior wall 85 , and a downward slope from the lower end of the interior wall 85 . It may include a photo inner lower wall 87 . Accordingly, the upper joint portion 61 may have a “C”-shaped cross section by the outer wall 81 , the outer upper wall 82 , and the outer lower wall 83 .

The outer center pillar 60 may have a second mounting part 90 mounted to the first mounting part 70 , and the upper joint part 61 is integral with the outer center pillar 60 through the second mounting part 90 . can be connected to The second mounting portion 90 includes a second mounting wall 91 facing toward the interior of the vehicle, a second front side mounting wall 92 extending from the second mounting wall 91 toward the front of the vehicle; It may include a second rear-side mounting wall 93 extending from the second mounting wall 91 toward the rear of the vehicle.

3 and 4, the upper joint portion 61 of the outer center pillar 60 may be coupled to the interior surface of the outer roof side portion 51 through fasteners, welding, etc., and the outer center pillar ( The second mounting part 90 of 60 may be coupled to the interior surface of the first mounting part 70 of the outer roof side part 51 . Through this, since the upper joint portion 61 of the outer center pillar 60 can be more coupled to the outer roof side portion 51, the connectivity between the upper end of the outer center pillar 60 and the outer roof side portion 51 is improved. can be further strengthened.

Specifically, as shown in FIG. 7 , the second mounting wall 91 of the second mounting part 90 may be coupled to the first mounting wall 71 of the first mounting part 70 through welding W7, The second front side mounting wall 92 of the second mounting unit 90 may be coupled to the first front side mounting wall 72 of the first mounting unit 70 through welding W8, and the second mounting unit 90 The second rear-side mounting wall 93 of the may be coupled to the first rear-side mounting wall 73 of the first mounting portion 70 through welding W9. Accordingly, the second mounting portion 90 of the outer center pillar 60 may be strongly coupled to the first mounting portion 70 of the outer roof side portion 51 .

Referring to FIG. 5 , the upper joint portion 61 of the outer center pillar 60 may be coupled to the interior surface of the outer roof side portion 51 , and a “C”-shaped cross-section of the upper joint portion 61 is welded. Through (W1, W2) may be coupled to the "C"-shaped cross section of the outer roof side portion (51). Specifically, the inner upper wall 86 of the upper joint portion 61 may be coupled to the outer upper wall 82 of the outer roof side portion 51 through welding W1, and The inner lower wall 87 may be coupled to the outer lower wall 83 of the outer roof side portion 51 through welding W2, and the inner wall 85 of the upper joint portion 61 is connected to the outer roof side portion It can be spaced apart with respect to the outdoor wall (81) of (51). In this way, the upper joint portion 61 and the outer roof side portion 51 of the outer center pillar 60 are coupled to each other in a double-wall structure of a “C”-shaped cross-section, thereby realizing a coupling structure of a relatively large area. In particular, when a load is applied to the outer roof side portion 51, the load is applied to the outer upper wall 82 of the outer roof side portion 51 and the inner upper wall 86 of the upper joint portion 61, the outer loop It can be uniformly distributed up and down through the outer lower wall 83 of the side part 51 and the inner lower wall 87 of the upper joint part 61 . That is, since the joint portion between the center pillar and the roof side can be firmly connected, the collision performance and rigidity of the side structure 10 for a vehicle can be strengthened. In particular, since the upper joint portion 61 of the outer center pillar 60 is coupled to the outer roof side portion 51 without a separate bracket, the weight and cost thereof are easily reduced.

Referring to FIG. 5 , the outer roof side part 51 may have an upper flange 82a extending from the outer upper wall 82 and a lower flange 83a extending from the outer lower wall 83 . The upper flange 82a of the outer roof side portion 51 may be coupled to the inner roof side member 21 through welding W3, and the lower flange 83a and the first inner side of the outer roof side portion 51 The center pillar 31 may be coupled to the inner roof side member 21 through welding W4. Accordingly, between the outer roof side portion 51 and the inner roof side member 21 , the cavities 88 and 89 sealed to the outside can be defined, and in particular, the upper joint portion 61 of the outer center pillar 60 . ) is coupled to the interior surface of the outer roof side portion 51, so that two cavities 88 and 89 may be partitioned between the outer roof side portion 51 and the inner roof side member 21, through which the center pillar And the connection rigidity and impulse performance between the roof side can be significantly strengthened.

6 and 7, the center pillar reinforcement 33 is welded (W7, W8, W9) together with the first mounting portion 70 of the outer roof side portion 51 through the upper end of the outer center pillar (60) By being coupled to the second mounting portion 90 of the joint portion 61, the connection rigidity between the upper joint portion 61 and the outer roof side portion 51 of the outer center pillar 60 can be significantly strengthened.

Referring to FIG. 9 , the side reinforcement 55 may be coupled to the exterior surface of the inner roof side member 21 , and the center pillar reinforcement 33 includes the exterior surface and the second interior surface of the first inner center pillar 31 . It may be coupled to a portion of the lower region 32b of the center pillar 32 .

In particular, as shown in FIGS. 7 and 9 , the center pillar reinforcement 33 may have an upper extension portion 33a extending from its upper end toward the roof side. The cross-section of the upper extension portion 33a may have a shape similar to that of the center pillar reinforcing material 33 . The upper extension portion 33a may be connected to the outer roof side portion 51 and the inner roof side member 21 constituting the roof side.

The upper extension portion 33a may be coupled to the second mounting portion 90 of the upper joint portion 61 of the outer center pillar 60 and the first inner center pillar 31, through which the upper extension portion 33a may connect the upper joint portion 61 and the inner roof side member 21 of the outer center pillar 60 . That is, the center pillar reinforcing material 33 may more firmly connect the joint portion between the center pillar and the roof side by the upper extension portion 33a.

Referring to FIG. 7 , the upper extension portion 33a includes an interior wall 101 facing toward the interior of the vehicle, a front wall 102 connected to the front edge of the interior wall 101 , and an interior wall 101 . It may have a rear wall 103 connected to the rear edge, a front side flange 104 extending from the front wall 102 , and a rear side flange 105 extending from the rear wall 103 . Through this, the upper end extension 33a of the center pillar reinforcement 33 may have a “U”-shaped cross-section formed by the interior wall 101 , the front wall 102 , and the rear wall 103 .

The upper extension part (33a) may be coupled to the interior surface of the second mounting part (90) of the outer center pillar (60), and the first mounting part (70) of the outer roof side part (51) is the outer center pillar (60) It may be coupled to the outdoor surface of the second mounting portion 90 of the. Through this, the upper joint portion 61 of the outer center pillar 60 may be firmly coupled to the roof side portion 51 .

The interior wall 101 of the upper extension part 33a is formed of the outer center pillar 60 together with the first mounting wall 71 of the first mounting part 70 of the outer roof side part 51 through welding W7. It can be coupled to the second mounting wall 91 of the second mounting portion 90, and the front flange 104 of the upper extension portion 33a is formed together with the inner roof side member 21 through welding W5. 1 Can be coupled to the inner center pillar 31, the rear flange 105 of the upper extension portion 33a is a first inner center pillar 31 together with the inner roof side member 21 through welding (W6) can be coupled to In this way, the interior wall 101 of the upper extension portion 33a of the center pillar reinforcement 33 is coupled to the upper joint portion 61 of the outer center pillar 60, and the upper extension portion of the center pillar reinforcement 33 Since 33a is coupled to the first inner center pillar 31, the center pillar reinforcement 33 can strengthen the connection between the outer member and the inner member of the side structure 10 for a vehicle, thereby reducing the thickness compared to the prior art. can be facilitated, and through this, weight and cost reduction can be effectively achieved.

On the other hand, the inner roof side member 21 may have a first opening 21c that allows the welding gun to perform welding to enter, and the first inner center pillar 31 has a first opening that is aligned with the first opening 21c. It may have two openings 31c. The first opening 21c and the second opening 31c are surrounded by the "U"-shaped cross section of the center pillar reinforcement 33, so that the side structure 10 for a vehicle due to the first opening 21c and the second opening 31c ) can be prevented from lowering the stiffness.

Referring to FIG. 8 , the center pillar reinforcement 33 includes an interior wall 201 facing toward the interior of the vehicle, a front wall 202 formed on the front edge of the interior wall 201 , and an interior wall 201 . It may have a rear wall 203 formed at the rear edge, a front side flange 204 extending from the front wall 202 , and a rear side flange 205 extending from the rear wall 203 . Through this, the center pillar reinforcement 33 may have a “U”-shaped cross section formed by the interior wall 201 , the front wall 202 , and the rear wall 203 .

Referring to FIG. 8 , the first inner center pillar 31 includes an interior wall 111 facing toward the interior of the vehicle, a front wall 112 formed on the front edge of the interior wall 111 , and an interior wall 111 . ) a rear wall 113 formed on the rear edge of, a first front side flange 114 extending from the front wall 112 , a first rear side flange 115 extending from the rear wall 113 , the first It may include a second front side flange 116 steppedly connected to the front side flange 114 and a second rear side flange 117 steppedly connected to the first rear side flange 115 . The first inner center pillar 31 may have a protruding wall 119 protruding from the center of the interior wall 111 toward the exterior of the vehicle, and the protruding wall 119 of the first inner center pillar 31 is welded. It may be coupled to the interior wall 201 of the center pillar reinforcement 33 through (W14). The first inner center pillar 31 includes an interior wall 111 , a front wall 112 , a rear wall 113 , a protruding wall 119 , a first front flange 114 , and a second front flange 116 . , may have a “W”-shaped cross section formed by the first rear flange 115 and the second rear flange 117 .

Referring to FIG. 8 , the outer center pillar 60 includes an outdoor wall 121 facing the outside of the vehicle, a front wall 122 connected to the front edge of the outdoor wall 121 , and an outdoor wall 12 . It may have a rear wall 123 connected to the rear edge, a front side flange 126 extending from the front wall 122 , and a rear side flange 127 extending from the rear wall 123 . The outer center pillar 60 may have a recessed wall 129 recessed from the center of the exterior wall 121 toward the interior of the vehicle, and the recessed wall 129 of the outside center pillar 60 is welded W14. It may be coupled to the interior wall 201 of the center pillar reinforcement 33 through. The first inner center pillar 31 may have a “W”-shaped cross section formed by the interior wall 111 , the front wall 112 , the rear wall 113 , and the protruding wall 119 .

Referring to FIG. 8 , the center pillar reinforcing material 33 may be coupled to the outdoor surface of the first inner center pillar 31 , and the upper region 32a of the second inner center pillar 32 is formed by the first inner center pillar 31 . It can be coupled to the interior surface of (31). Accordingly, the rigidity, strength, etc. of the first inner center pillar 31 can be reinforced by the upper region 32a of the second inner center pillar 32 and the center pillar reinforcing material 33 , whereby the vehicle In the event of a rollover accident, bending and damage of the center pillar can be prevented. In addition, the "U"-shaped cross section of the center pillar reinforcing material 33 is configured to be supported by the "W" shaped cross section of the first inner center pillar 31, whereby deformation or damage of the center pillar reinforcing material 33 can be effectively prevented. can Specifically, the front wall 202 of the center pillar reinforcement 33 is coupled to the front wall 112 of the first inner center pillar 31 through welding W10, and the rear wall ( 203 is coupled to the rear wall 113 of the first inner center pillar 31 through welding W11, the front flange 204 of the center pillar reinforcement 33 and the second inner center pillar 32 The upper region 32a is commonly coupled to the first front side flange 114 of the first inner center pillar 31 through welding W12, and the rear side flange 205 and the second side flange 205 of the center pillar reinforcement 33 The upper region 32a of the second inner center pillar 32 is commonly coupled to the first rear flange 115 of the first inner center pillar 31 through a welding W13. The protruding wall 119 of the first inner center pillar 31 and the recessed wall 129 of the outer center pillar 60 are commonly coupled to the interior wall 201 of the center pillar reinforcement 33 through welding W14. can be

The width of the first inner center pillar 31 may be formed to be wider than the width of the center pillar reinforcing material 33, and the edge flanges 116 and 117 of the first inner center pillar 31 attach fasteners, welding, etc. It may be coupled to the edge side flanges 126 and 127 of the outer center pillar 60 through. Referring to FIG. 8 , the second front flange 116 of the first inner center pillar 31 is coupled to the front flange 126 of the outer center pillar 60 through welding W15, and the first inner The second rear flange 117 of the center pillar 31 is coupled to the rear flange 127 of the outer center pillar 60 through a welding W16.

When a vehicle rollover accident occurs, the front wall 112 of the first inner center pillar 31 supports the front wall 202 of the center pillar reinforcement 33 and the rear wall of the first inner center pillar 31 Since the 113 supports the rear wall 203 of the center pillar reinforcement 33, it is possible to prevent the "U"-shaped cross section of the center pillar reinforcement 33 from widening or collapsing.

10 and 11 , the side reinforcement 55 may have a rear extension portion 56a extending from the rear end of the roof-side reinforcement portion 56 toward the outer center pillar 60 . A cross-section of the rear extension portion 56a may have a shape similar to that of the roof-side reinforcement portion 56 . The rear extension portion 56a may be coupled to the upper joint portion 61 of the outer center pillar 60 .

Referring to FIG. 12 , the rear extension part 56a of the roof-side reinforcement part 56 includes an interior wall 131 facing toward the interior of the vehicle, and an upper wall 132 inclined upward from the upper end of the interior wall 131 . ) and a lower wall 133 inclined downward from the lower end of the interior wall 131 . Accordingly, the rear extension portion 56a may have a “C”-shaped cross section by the interior wall 131 , the upper wall 132 , and the lower wall 133 .

The rear extension part 56a of the roof side reinforcement part 56 of the side reinforcement member 55, the upper joint part 61 of the outer center pillar 60, and the outer roof side part 51

12, the rear extension portion 56a of the roof-side reinforcement portion 56 may be coupled to the interior surface of the upper joint portion 61 of the outer center pillar 60, and the rear extension portion 56a of The "C"-shaped cross-section can be coupled to the "C"-shaped surface of the upper joint part 61 through welding (W17, W18), and the "C"-shaped cross-section of the upper joint part 61 is welded (W17, W18). ) may be coupled to the “C”-shaped cross-section of the outer roof side portion 51 . Specifically, the upper wall 132 of the rear extension portion 56a is coupled to the inner upper wall 86 of the upper joint portion 61 through welding W17, and the inner upper wall ( 86 is coupled to the interior surface of the outer upper wall 82 of the outer roof side portion 51 through welding W17. The lower wall 133 of the rear extension portion 56a is coupled to the interior surface of the inner lower wall 87 of the upper joint portion 61 through welding W18, and the inner lower wall ( 87 is coupled to the interior surface of the outer lower wall 83 of the outer roof side portion 51 through welding W18. The interior wall 131 of the rear extension portion 56a may be spaced apart from the interior wall 85 of the upper joint portion 61 .

In this way, the roof-side reinforcement portion 56 of the side reinforcement 55 is directly connected to the upper joint portion 61 of the outer center pillar 60 through the rear extension portion 56a, so that the joint portion of the center pillar Connectivity, stiffness, strength, etc. can be significantly improved. In addition, the rear extension portion 56a of the roof side reinforcement portion 56 of the side reinforcement member 55, the upper joint portion 61 of the outer center pillar 60, and the outer roof side portion 51 correspond to each other. "By mutual coupling with a three-wall structure of a cross-section, a relatively large-area coupling structure can be realized. Through this, since the joint portion between the center pillar and the roof side can be firmly connected, the collision performance and rigidity of the side structure 10 for a vehicle can be strengthened.

12, the upper flange 82a of the outer roof side part 51 may be coupled to the inner roof side member 21 through welding W19, and the lower flange of the outer roof side part 51 ( 83a) and the upper joint portion 61 of the outer center pillar 60 may be coupled to the inner roof side member 21 through welding W20. Cavities 181 , 182 , 183 sealed to the outside may be defined between the outer roof side portion 51 and the inner roof side member 21 , and in particular, the upper joint portion 61 of the outer center pillar 60 . and three cavities ( 181, 182, 183) can be partitioned, and through this, the connection rigidity and impulse performance between the center pillar and the roof side can be significantly strengthened.

Referring to FIG. 13 , the roof-side reinforcement part 56 of the side reinforcement 55 includes an interior wall 141 facing toward the interior of the vehicle, and an upper wall 142 inclined upward from the upper end of the interior wall 141 . and a lower wall 143 inclined downward from the lower end of the interior wall 141 . Accordingly, the roof-side reinforcing part 56 may have a “C”-shaped cross section by the interior wall 141 , the upper wall 142 , and the lower wall 143 .

Referring to FIG. 13 , the roof-side reinforcing part 56 of the side reinforcement 55 may be coupled to the interior surface of the outer roof-side part 51 of the outer side member 50 . Specifically, the upper wall 142 of the roof-side reinforcing part 56 is coupled to the outer upper wall 82 of the outer roof-side part 51 through welding W21, and the lower part of the roof-side reinforcing part 56 is The wall 143 is coupled to the outer lower wall 83 of the outer roof side portion 51 via a weld W22. The interior wall 141 of the roof-side reinforcement portion 56 may be spaced apart from the exterior wall 81 of the outer roof-side portion 51 . In this way, the roof side reinforcement part 56 and the outer roof side part 51 of the side reinforcement member 55 are mutually coupled to each other in a double-wall structure of a "C"-shaped cross-section corresponding to each other, thereby realizing a coupling structure of a relatively large area. can Through this, it is possible to strengthen the collision performance and rigidity of the side structure 10 for a vehicle.

13, the upper flange 82a of the outer roof side part 51 may be coupled to the inner roof side member 21 through welding W23, and the lower flange (82a) of the outer roof side part 51 ( 83a) may be coupled to the inner roof side member 21 through a welding W24. Cavities 184 and 185 sealed to the outside may be defined between the outer roof side part 51 and the inner roof side member 21 , and in particular, the roof side reinforcement part 56 of the side reinforcement member 55 is formed on the outside. By being coupled to the interior surface of the roof side portion 51, two cavities 184 and 185 may be partitioned between the outer roof side portion 51 and the inner roof side member 21, and through this, the rigidity of the roof side and Impulse performance and the like can be greatly enhanced.

14 and 15 , the inner lower front pillar 42 includes an outdoor wall 161 facing the exterior of the vehicle, an interior wall 162 facing toward the interior of the vehicle, and a portion of the exterior wall 161 . It may include a cutout 163 formed in the . The cutout 163 may be formed at the inner periphery of the outdoor wall 161 adjacent to the door opening 5 , and the front pillar reinforcement 46 covers the cutout 163 of the inner lower front pillar 42 . can be mounted

In addition, the inner lower front pillar 42 may include an upper extension portion 42a extending to the front end of the inner upper front filler 41, and the upper extension portion 42a is connected to the inner side through fasteners, welding, etc. It may be coupled to the front end of the upper front filler (41).

The front pillar reinforcement 46 may include a first cover wall 151 and a second cover wall 152 that cover the cutout 163 of the inner lower front pillar 42 . The first cover wall 151 may be positioned on the same plane with respect to the outer wall 161 of the inner lower front pillar 42 , and the second cover wall 152 is lowered from the first cover wall 151 to the inner lower wall 151 . It may extend toward the interior wall 162 of the front pillar 42 . The second cover wall 152 may be orthogonal to the first cover wall 151 . In addition, the front pillar reinforcement 46 includes a first coupling flange 153 extending from the first cover wall 151 , a second coupling flange 154 extending from the second cover wall 152 , and a first coupling. It may include a reinforcing rib 155 obliquely extending from the flange 153 . The first coupling flange 153 of the front pillar reinforcing material 46 may be coupled to the interior surface of the outdoor wall 161 of the inner front pillar 42 through welding W25, and the first coupling flange 153 of the front pillar reinforcing material 46 is The two coupling flanges 154 may be coupled to the interior wall 162 of the inner front pillar 42 through welding W26. The reinforcing rib 155 may extend from the first coupling flange 153 obliquely toward the interior wall 162 of the inner lower front pillar 42 at a predetermined angle. The front pillar reinforcing material 46 can further strengthen the mounting rigidity of the accessory by reinforcing its strength and rigidity by the reinforcing ribs 155 .

The cutout 163 of the inner lower front pillar 42 and the front pillar reinforcing member 46 may extend parallel to the outer line of the door opening 5 . The front pillar reinforcement 46 may have an upper extension portion 46a extending to the front end of the inner upper front filler 41, and the upper extension portion 46a may be formed through a fastener, welding, etc. 41) can be coupled to the front end.

The upper extension portion 46a of the front pillar reinforcement 46 may have the same length as the upper extension portion 42a of the inner lower front pillar 42, and thus the upper extension portion 46a of the front pillar reinforcement 46 is And the upper extension portion 42a of the inner lower front pillar 42 may be coupled together to the front end of the inner upper front pillar (41).

Referring to FIG. 15 , the front pillar reinforcement 46 may have a first mounting bead 171 having a fastening hole formed therein, and the first mounting bead 171 protrudes from the first cover wall 151 toward the exterior of the vehicle. can do. The cockpit cowl cross bar 8 may be mounted to the first mounting bead 171 by a fastener such as a bolt or the like.

15 , the inner lower front pillar 42 may have a fastening hole with a second mounting bead 172, and the second mounting bead 172 may protrude from the upper extension portion 42a toward the exterior of the vehicle. can The mounting lug 9a of the curtain air bag 9 may be mounted to the second mounting bead 172 by a fastener such as a bolt or the like. As the fastener is fastened to the fastening hole of the mounting lug 9a of the curtain airbag 9 and the fastening hole of the second mounting bead 172, the curtain airbag 9 is the inner lower front pillar 42, the inner upper front pillar ( 41) can be commonly combined.

According to the present invention configured as described above, by reinforcing the connectivity to the joint part of the front pillar and the joint part of the center pillar, collision performance and rigidity can be strengthened. Since the thickness can be reduced compared to the prior art, the weight saving effect is high.

In addition, the bending phenomenon of the joint portion of the front pillar and the joint portion of the center pillar when a vehicle crash occurs can be minimized, and the design of the garnish mounted on the front pillar can be more flexibly supported.

The above description is merely illustrative of the technical spirit of the present invention, and various modifications and variations will be possible without departing from the essential characteristics of the present invention by those skilled in the art to which the present invention pertains.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

5: Door opening 8: Cockpit cowl cross bar
9: Curtain air bag 10: Vehicle side structure
11: inner side assembly 12: outer side assembly
21: inner roof side member 23: mounting seat surface
31: first inner center pillar 32: second inner center pillar
33: center pillar reinforcement 41: inner upper front pillar
42: inner lower front filler 43: outer upper front filler
44: outer lower front pillar 45: front pillar side reinforcement
50: outer side member 51: outer roof side part
55: side reinforcement 56: roof side reinforcement
60: outer center pillar 61: upper joint part
62: lower joint part 70: first mounting part
71: first mounting wall 72: first front side mounting wall
73: first rear side mounting wall 81: outdoor wall
82: outer upper wall 83: outer lower wall
85: interior wall 86: inner upper wall
87: inner lower wall 90: second mounting portion
91: second mounting wall 92: second front side mounting wall
93: second rear side mounting wall

Claims (10)

An inner roof side member, an inner upper front pillar connected to the front end of the inner roof side member, an inner lower front pillar coupled to the front end of the inner upper front pillar, and a lower edge of the inner upper front pillar coupled to the lower edge of the inner roof side member an inner side assembly including a first inner center pillar, a second inner center pillar coupled to an indoor surface of the first inner center pillar, and a center pillar reinforcement coupled to an outdoor surface of the first inner center pillar; and
An outer side member having an outer roof side portion extending along a side edge of a vehicle roof and an outer upper front pillar extending obliquely from the outer roof side portion, a side reinforcement coupled to an interior surface of the outer side member; Containing; and
The outer center pillar has an upper joint portion coupled to the outer side member, and the upper joint portion of the outer center pillar is coupled to an interior surface of the outer roof side portion. The method according to claim 1,
The upper joint portion is a side structure for a vehicle integrally connected to the outer center pillar. 3. The method according to claim 2,
The upper joint part has a "C"-shaped cross section, and the outer roof side part has a "C"-shaped cross section,
A side structure for a vehicle in which the "C"-shaped cross-section of the upper joint part is coupled to the "C"-shaped cross-section of the outer roof side part through welding. 4. The method according to claim 3,
The outer roof side portion has a first mounting portion integrally formed at a lower portion thereof, and the outer center pillar has a second mounting portion coupled to the first mounting portion,
The upper joint portion is integrally connected to the outer center pillar through the second mounting portion, the center pillar reinforcement has an upper extension coupled to the second mounting portion, and the upper extension of the center pillar reinforcement is the second mounting portion A side structure for a vehicle coupled to an indoor surface, wherein the first mounting portion is coupled to an outdoor surface of the second mounting portion. The method according to claim 1,
The center pillar reinforcing material has a "U"-shaped cross section, and the center pillar reinforcing material is a side structure for a vehicle coupled to an interior surface of the first inner center pillar. 6. The method of claim 5,
The first inner center pillar has a “W”-shaped cross-section, and the edge side flanges of the first inner center pillar are coupled to the edge side flanges of the outer center pillar. 4. The method according to claim 3,
The side reinforcement includes a roof side reinforcement coupled to the outer roof side portion and a front pillar side reinforcement coupled to the outer upper front pillar,
A side structure for a vehicle in which the roof-side reinforcing part has a "C"-shaped cross section, and the "C"-shaped cross section of the roof-side reinforcing part is coupled to the "C"-shaped cross section of the outer roof side part through welding. 8. The method of claim 7,
The roof-side reinforcement portion has a rear extension coupled to the upper joint portion of the outer center pillar, and the rear extension portion has a "U"-shaped cross section,
The "C"-shaped cross section of the rear extension is coupled to the "C"-shaped cross-section of the upper joint portion through welding, and the "C"-shaped cross-section of the upper joint is welded to the "C"-shaped cross-section of the outer roof side part through welding. Combined vehicle side structure. The method according to claim 1,
The inner lower front filler has a cutout formed at the inner edge of the outdoor wall adjacent to the door opening,
A front pillar reinforcing material is mounted to cover the cutout of the inner lower front pillar, and the front pillar reinforcing material extends to be parallel to a partial outer line of the door opening,
The front pillar reinforcing material has an upper extension coupled to a lower end of the inner lower front pillar, and the front pillar reinforcing material includes an inclined reinforcing rib. 10. The method of claim 9,
The front pillar reinforcement has a first mounting bead to which a cockpit cowl cross bar is mounted, and the inner lower front pillar has a second mounting bead to which a curtain airbag is mounted.

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