CN214356269U - B-pillar joint structure - Google Patents
B-pillar joint structure Download PDFInfo
- Publication number
- CN214356269U CN214356269U CN202023276062.5U CN202023276062U CN214356269U CN 214356269 U CN214356269 U CN 214356269U CN 202023276062 U CN202023276062 U CN 202023276062U CN 214356269 U CN214356269 U CN 214356269U
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- hole
- pillar
- length direction
- rocker
- fastening portion
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- 238000013459 approach Methods 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000003466 welding Methods 0.000 description 20
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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Abstract
The utility model provides a B-pillar combination structure, in the structure, the outer side panel of the B-pillar is combined with a doorsill, the outer side panel is provided with an outer side panel main body part and a lower side combination part extending from the lower end of the outer side panel, and the front side fastening part and the rear side fastening part of the lower side combination part are respectively provided with a fastening part through hole which is communicated in the up-down direction; the top surface of the threshold is formed with threshold through holes corresponding to the fastening part through holes and penetrating in the vertical direction, bolts inserted into the fastening part through holes and the threshold through holes overlapped up and down connect the lower side combining part with the threshold, one of the fastening part through holes and the threshold through holes is an oblong through hole extending in the vehicle length direction, the other one is a circular bolt hole, the circular bolt hole is configured at one end of the oblong through hole in the vehicle length direction, and when the outer side panel expands in the vehicle length direction, the circular bolt hole approaches the other end of the oblong through hole in the vehicle length direction. With the above configuration, the B-pillar can be prevented from being separated from the threshold at the time of a side collision of the vehicle.
Description
Technical Field
The utility model relates to a B post joint construction, especially the structure that the outside panel and the threshold of B post combine.
Background
Conventionally, a B-pillar (also referred to as a center pillar) is manufactured from a high-tension plate material (high-tension steel plate, super high-tension steel plate, or the like), so that the wall thickness of an outer panel and an inner panel of the B-pillar is reduced, thereby reducing the weight of a vehicle body.
In general, when a B-pillar made of a high-tension plate material is joined to a rocker (also referred to as a lower rocker) extending in the vehicle length direction at the lower edge of a door opening, the lower end portion of an outer panel is joined to the top surface and the outer side surface of the rocker by spot welding in most cases.
However, when a vehicle is involved in a side collision, the B-pillar made of a high-tension plate material is largely elastically deformed, and therefore, a weld (spot-welded portion) is likely to be broken at a joint portion between the B-pillar and the rocker, and the B-pillar and the rocker may be separated from each other.
In order to prevent the B-pillar from being separated from the rocker, spot welding may be performed at a joint portion between the B-pillar and the rocker, and a bolt fastening portion, an arc welding portion, or the like may be added. However, this causes a problem of cost increase.
SUMMERY OF THE UTILITY MODEL
In view of the above-described problems, an object of the present invention is to provide a B-pillar joining structure that can prevent a B-pillar from separating from a rocker in a side collision of a vehicle while achieving weight reduction and cost reduction.
As a technical solution to solve the above technical problem, the present invention provides a B-pillar joining structure, which is a structure in which an outer panel of a B-pillar made of a high-tension plate material is joined to a doorsill extending in a vehicle length direction at a lower edge of a door opening portion, the outer panel has an outer panel main body portion extending in an up-down direction and a lower side joining portion extending from a lower end of the outer panel main body portion, the lower side joining portion has a front side fastening portion and a rear side fastening portion, the front side fastening portion and the rear side fastening portion are respectively superposed on a top surface of the doorsill at positions closer to a front side and a rear side of the vehicle length direction than the outer panel main body portion, and the B-pillar joining structure is characterized in that: fastening part through holes which are penetrated in the vertical direction are respectively formed on the front side fastening part and the rear side fastening part; in the vehicle body structure of the present invention, the side sill may include a side sill through-hole formed on a top surface thereof, the side sill through-hole being formed to correspond to each of the fastening portion through-holes and to vertically penetrate therethrough, a bolt inserted into the fastening portion through-hole and the side sill through-hole being vertically overlapped to connect the lower coupling portion to the side sill, one of the fastening portion through-hole and the side sill through-hole being formed as an oblong through-hole extending in a vehicle length direction, and the other of the fastening portion through-hole and the side sill through-hole being formed as a circular bolt hole, the circular bolt hole being disposed at one end of the oblong through-hole in the vehicle length direction, and the circular bolt hole being located closer to the other end of the oblong through-hole in the vehicle length direction when the outer panel is deformed in an expanding manner in the vehicle length direction.
Based on the utility model discloses an above-mentioned B post combines the structure, can realize lightweight and low cost, can prevent B post and threshold phase separation when the vehicle takes place the side collision again. Specifically, the outer panel and the inner panel of the B-pillar formed of a high-tension plate material are thin, and only the front fastening portion and the rear fastening portion are provided with the bolt fastening portions to be connected to the rocker, so that the vehicle body can be reduced in weight and cost. On the other hand, since one of the fastening portion through hole and the rocker through hole is configured as an oblong through hole extending in the vehicle length direction and the other is configured as a circular bolt hole, and when the outer panel is deformed so as to expand in the vehicle length direction, the circular bolt hole can be brought close to (relatively moved from) one end of the oblong through hole in the vehicle length direction to the other end, when the outer panel of the B-pillar is elastically deformed by a side collision of the vehicle, the bolt in the circular bolt hole can be relatively moved in the oblong through hole to maintain a state in which the front fastening portion and the rear fastening portion are connected to the rocker, and the amount of relative movement between the oblong through hole and the bolt can absorb the amount of deformation of the outer panel, so that the B-pillar can be prevented from being separated from the rocker.
The utility model discloses an among the above-mentioned B post joint construction, can be, the threshold through-hole is constituted for circular bolt hole, fastening portion through-hole be constituted for circular bolt hole to the oblong through-hole that outside panel main part side extended.
With this structure, when the outer panel of the B-pillar is deformed in an expanding manner in the vehicle length direction, the front-side fastening portion and the rear-side fastening portion can move outward in the vehicle length direction until the end of each oblong through hole, which is originally far from the circular bolt hole, abuts against the bolt in the circular bolt hole, and during this time, the bolt can maintain the state of connecting the front-side fastening portion and the rear-side fastening portion to the rocker without being affected by the deformation of the outer panel, and therefore, the B-pillar can be effectively prevented from being separated from the rocker.
The utility model discloses an in the above-mentioned B post joint construction, also can, fastening portion through-hole is constituted for circular bolt hole, the threshold through-hole be constituted for circular bolt hole to the oblong through-hole that the opposite side of outside panel main part extended.
Based on this structure, when the outer panel of the B-pillar is deformed in an expanding manner in the vehicle length direction, the front-side fastening portion and the rear-side fastening portion can move outward in the vehicle length direction until the bolts in the respective circular bolt holes abut against one end of the oblong through holes, which is originally far from the circular bolt holes, and during this period, the bolts can maintain a state of connecting the front-side fastening portion and the rear-side fastening portion to the rocker without being affected by the deformation of the outer panel, so that the B-pillar can be effectively prevented from being separated from the rocker.
Here, the high-tension plate material also includes an ultra-high-tension plate material (ultra-high-tension steel plate).
Drawings
Fig. 1 is a perspective view schematically showing a B-pillar joint structure according to an embodiment of the present invention.
Fig. 2 is an enlarged perspective view schematically showing the rear fastening portion in fig. 1.
Fig. 3 is an enlarged perspective view schematically showing a rear fastening portion in a B-pillar joint structure according to another embodiment of the present invention.
Fig. 4 is a perspective view schematically showing a conventional B-pillar joint structure.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the present invention is not limited to the contents described in the following embodiments. In addition, the dimensional relationship (length, width, etc.) in each drawing does not reflect the actual dimensional relationship.
Fig. 1 is a perspective view schematically showing a B-pillar joint structure according to the present embodiment. For clarity, in fig. 1, only the outer side panel 11 is shown with respect to the B pillar 10, and only the rocker outer member 5 is shown with respect to the rocker 3. In fig. 1, the direction of arrow Fw indicates the front side in the vehicle length direction, the direction of arrow Up indicates the upper side in the vertical direction, and the direction of arrow Out indicates the outer side in the vehicle width direction.
Fig. 1 shows a case where the B-pillar joint structure of the present embodiment is adopted in the side portion on the left side in the vehicle width direction. In this B-pillar joining structure, the lower end portion of the B-pillar 10 is joined to the rocker 3, wherein the B-pillar 10 extends in the vehicle height direction and separates the front side door opening 1F and the rear side door opening 1R; the rocker 3 extends in the vehicle length direction at the lower edges of the door opening portion 1F and the door opening portion 1R.
The rocker 3 includes a rocker outer member 5 disposed on the vehicle width direction outer side and a rocker inner member (not shown) disposed on the vehicle width direction inner side. The rocker outer member 5 and the rocker inner member each have a hat-shaped cross section. The rocker 3 is a member having a hollow structure with a closed cross section, which is formed by overlapping and spot-welding flange portions 5c of the rocker outer member 5 and the rocker inner member, respectively.
Here, the B-pillar 10 is made of an ultra-high tensile plate material (ultra-high tensile steel plate). The B-pillar 10 includes an outer panel 11 constituting an outer panel thereof and an inner panel (not shown) constituting an inner panel thereof. The outer panel 11 and the inner panel (not shown) each have a hat-shaped cross section. The B-pillar 10 is a member having a hollow structure with a closed cross section, which is formed by overlapping the flange portion 13d of the outer panel 11 and the flange portion 13e of the inner panel and spot-welding them (refer to a welding point 23 in fig. 1).
In the present embodiment, since the B-pillar 10 is made of a super high tension plate material, the outer panel 11 and the inner panel can be thinned, and a B-pillar reinforcement or the like for reinforcing the entire B-pillar 10 can be omitted, so that the vehicle body can be reduced in weight.
The outer panel 11 includes an outer panel body 13 extending in the vehicle height direction, an upper connecting portion (not shown) extending from an upper end of the outer panel body 13, and a lower connecting portion 15 extending from a lower end of the outer panel body 13. The upper side joint portion is joined by welding or the like to a roof side rail (not shown) extending in the vehicle longitudinal direction at a side edge of a roof (roof portion).
The outer panel body 13 includes an outer wall portion 13a, a front wall portion 13b extending inward in the vehicle width direction from a front end portion of the outer wall portion 13a, a rear wall portion 13c extending inward in the vehicle width direction from a rear end portion of the outer wall portion 13a, a front flange portion 13d extending forward in the vehicle length direction from an inner end portion of the front wall portion 13b in the vehicle width direction, and a rear flange portion 13e extending rearward in the vehicle length direction from an inner end portion of the rear wall portion 13c in the vehicle width direction.
As shown in fig. 1, the lower coupling portion 15 has a shape that extends from the lower end portion of the outer panel body portion 13 toward the front and rear of the vehicle. The lower coupling portion 15 includes an outer fastening portion 15a, a front fastening portion 15b, a rear fastening portion 15c, a front flange 15d, and a rear flange 15 e.
The outer fastening portion 15a extends in the vehicle front-rear direction while extending downward from the lower end of the outer wall portion 13a of the outer panel body portion 13, and is joined to the outer wall portion 5a of the rocker outer 5 by spot welding (see spot welding 25 a).
The front fastening portion 15b extends forward in the vehicle longitudinal direction while being bent from the lower end of the front side wall portion 13b of the outer panel body portion 13, and is joined to the upper wall portion 5b of the rocker outer 5 at a position forward in the vehicle longitudinal direction of the outer panel body portion 13 by spot welding (see spot welding 25 b).
The rear fastening portion 15c extends rearward in the vehicle length direction while being bent from the lower end of the rear side wall portion 13c of the outer panel body 13, and is joined to the upper wall portion 5b of the rocker outer 5 at a position rearward in the vehicle length direction than the outer panel body 13 by spot welding (see the weld point 25 c).
The front flange 15d extends forward in the vehicle longitudinal direction from the lower end of the front flange 13d of the outer panel body 13, and is joined to the upper flange 5c of the rocker outer 5 by spot welding.
The rear flange 15e extends rearward in the vehicle length direction from the lower end of the rear flange 13e of the outer panel body 13, and is joined to the upper flange 5c of the rocker outer 5 by spot welding.
Here, in order to make the present invention easier to understand, a B-pillar joining structure of the related art will be described. Fig. 4 is a perspective view schematically showing a conventional B-pillar joint structure. The prior art B-pillar 110 is also constructed of high tensile sheet material. As shown in fig. 4, in the B-pillar 110, the outer panel 111 has an outer panel body portion 113 and a lower bonding portion 115. In the B-pillar joining structure of the related art, the outer fastening portion 115a is joined to the outer wall portion 5a of the rocker outer 5 by spot welding (see the weld 125 a); the front fastening portion 115b is joined to the upper wall portion 5b of the rocker outer 5 by spot welding (see spot welding 125 b); the rear fastening portion 115c is joined to the upper wall portion 5b of the rocker outer 5 by spot welding (see spot welding 125 c).
However, in the structure in which the B-pillar 110 is made of a high-tension plate material, when a vehicle collides on a side, the outer panel 111 having a hat-shaped cross section is largely elastically deformed and expanded in the vehicle longitudinal direction, and therefore, there is a possibility that the weld 125a, the weld 125B, and the weld 125c are cracked at the joint portion between the B-pillar 110 and the rocker 3, and the B-pillar 110 and the rocker 3 are separated from each other.
In order to avoid the occurrence of separation of the B-pillar 110 from the rocker 3, in the B-pillar joining structure of the related art, in addition to spot welding, bolts 130 and 131 for fixedly connecting the outer fastening portion 115a and the outer wall portion 5a, bolts 132 and fillet welds 140 for fixedly connecting the front fastening portion 115B and the upper wall portion 5B, and bolts 133 and fillet welds 141 for fixedly connecting the rear fastening portion 115c and the upper wall portion 5B are added to the joining portion of the B-pillar 110 and the rocker 3. However, this leads to an increase in cost.
In contrast, in the B-pillar joining structure of the present embodiment, as shown in fig. 1, the B-pillar 10 can be prevented from being separated from the rocker 3 during a side collision of the vehicle only by the minimum bolt connection of the bolt 30 connecting the front fastening portion 15B to the upper wall portion 5B of the rocker outer 5 and the bolt 31 connecting the rear fastening portion 15c to the upper wall portion 5B of the rocker outer 5. This will be described in detail below.
Fig. 2 is an enlarged perspective view schematically showing the rear fastening portion 15 c. As shown in fig. 2, a through hole 50 penetrating in the vertical direction is formed in the rear fastening portion 15 c; a bolt hole 60 penetrating in the vertical direction and overlapping the through hole 50 is formed in the upper wall portion 5b of the rocker outer 5 (the top surface of the rocker 3). The bolt hole 60 is configured to correspond to a threaded hole of a weld nut (not shown) fixed to the rocker outer 5. The rear fastening portion 15c is connected to the upper wall portion 5b by a bolt 31 inserted through the vertically overlapped through hole 50 and bolt hole 60. The bolt hole 60 formed in the upper wall portion 5b is a circular bolt hole, and the through hole 50 formed in the rear fastening portion 15c is a long hole extending toward the outer panel body portion 13 side in the vehicle length direction with respect to the bolt hole 60.
As described above, in the B-pillar joint structure of the present embodiment, since the through hole 50 is an oblong through hole extending toward the outer panel body portion 13 side in the vehicle length direction, when the outer panel 11 elastically deforms and expands in the vehicle length direction in the event of a side collision of the vehicle, the rear fastening portion 15c can move to the rear side in the vehicle length direction until the end of the through hole 50 originally distant from the bolt hole 60 comes into contact with the bolt 31 in the bolt hole 60. During this time, the bolt 31 can maintain the state of connecting the rear fastening portion 15c and the upper wall portion 5b without being affected by the deformation of the outer panel 11, and the amount of relative movement between the through hole 50 and the bolt 31 can absorb the amount of deformation of the outer panel 11 toward the rear side in the vehicle length direction.
Meanwhile, since the coupling structure between the front side fastening portion 15b and the upper wall portion 5b is the same as the coupling structure between the rear side fastening portion 15c and the upper wall portion 5b, when the outer panel 11 is elastically deformed and expanded in the vehicle length direction, the bolt 30 can maintain the state in which the front side fastening portion 15b is coupled to the upper wall portion 5b without being affected by the deformation of the outer panel 11, and the amount of relative movement between the oblong through hole in the front side fastening portion 15b and the bolt 30 can absorb the amount of deformation of the outer panel 11 to the front side in the vehicle length direction.
Therefore, according to the B-pillar joining structure of the present embodiment, the lower joining portion 15 can be connected to the rocker 3 only by the minimum bolt connection portion, and the B-pillar 10 can be effectively prevented from being separated from the rocker 3 at the time of a side collision of the vehicle.
< other embodiments >
Fig. 3 is an enlarged perspective view schematically showing a rear fastening portion 15 c' according to another embodiment of the present invention. The B-pillar 10 '(outer panel 11') in fig. 3 is the same as the B-pillar 10 (outer panel 11) in the above embodiment except for the bolt holes 51. The rocker 3 '(rocker outer 5') in fig. 3 has the same structure as the rocker 3 (rocker outer 5) except for the through hole 61 and the absence of the weld nut.
As shown in fig. 3, a bolt hole 51 for inserting the bolt 31 is formed in the rear fastening portion 15 c'. On the other hand, a through hole 61 that penetrates in the vertical direction and overlaps the bolt hole 51 is formed in the upper wall portion 5b ' of the rocker outer 5 ' (the top surface of the rocker 3 '). The rear fastening portion 15c 'is connected to the upper wall portion 5 b' by a bolt 31 inserted through the bolt hole 51 and the through hole 61 which are overlapped up and down. The bolt hole 51 formed in the rear fastening portion 15c 'is a circular bolt hole, and the through hole 61 formed in the upper wall portion 5 b' is an oblong through hole extending in the vehicle length direction toward the opposite side of the outer panel body with respect to the bolt hole 51.
As described above, in the B-pillar joining structure of the present embodiment, since the through hole 61 is an oblong through hole extending in the vehicle length direction toward the opposite side of the outer panel main body, when the outer panel 11 'is elastically deformed and expanded in the vehicle length direction in the event of a side collision of the vehicle, the rear fastening portion 15 c' can be moved to the rear side in the vehicle length direction until the bolt 31 comes into contact with one end of the oblong through hole 61 that is originally far from the bolt hole 51. Meanwhile, the front fastening portion having the same structure can be displaced toward the front side in the vehicle length direction in the same manner. During this time, the bolts 30 and 31 can maintain the state of connecting the front fastening portion 15b ' and the rear fastening portion 15c ' to the upper wall portion 5b ' without being affected by the deformation of the outer panel 11 ', and the amount of relative movement between the oblong through-hole and the bolts 30 and 31 can absorb the amount of deformation of the outer panel 11 ' in the vehicle length direction.
Therefore, according to the B-pillar joining structure of the present embodiment, the lower joining portion 15 'and the rocker 3' can be joined by only a minimum bolt joining portion, and the B-pillar 10 'and the rocker 3' can be effectively prevented from being separated from each other at the time of a side collision of the vehicle.
Claims (3)
1. A B-pillar joining structure in which a side panel of a B-pillar made of a high-tensile plate material is joined to a side sill extending in a vehicle length direction at a lower edge of a door opening, the side panel includes a side panel main body extending in a vertical direction and a lower joining portion extending from a lower end of the side panel main body, the lower joining portion includes a front fastening portion and a rear fastening portion, and the front fastening portion and the rear fastening portion are respectively overlapped with top surfaces of the side sill at positions on a front side and a rear side in the vehicle length direction with respect to the side panel main body, characterized in that:
fastening part through holes which are penetrated in the vertical direction are respectively formed on the front side fastening part and the rear side fastening part;
threshold through holes which correspond to the fastening part through holes respectively and are penetrated in the vertical direction are formed on the top surface of the threshold,
bolts inserted into the fastening portion through holes and the rocker through holes which are vertically overlapped connect the lower side combining portion with the rocker,
one of the fastening portion through hole and the rocker through hole is configured as an oblong through hole extending in the vehicle length direction, and the other is configured as a circular bolt hole disposed at one end of the oblong through hole in the vehicle length direction, and the circular bolt hole approaches the other end of the oblong through hole in the vehicle length direction when the outer panel is deformed so as to expand in the vehicle length direction.
2. The B-pillar bond construction of claim 1, wherein:
the threshold through-hole is configured as a circular bolt hole,
the fastening portion through hole is configured as an oblong through hole extending toward the outer panel body portion side with respect to the circular bolt hole.
3. The B-pillar bond construction of claim 1, wherein:
the fastening portion through-holes are configured as circular bolt holes,
the rocker through hole is configured as an oblong through hole extending to the opposite side of the outer panel body with respect to the circular bolt hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276062.5U CN214356269U (en) | 2020-12-29 | 2020-12-29 | B-pillar joint structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023276062.5U CN214356269U (en) | 2020-12-29 | 2020-12-29 | B-pillar joint structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214356269U true CN214356269U (en) | 2021-10-08 |
Family
ID=77949902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023276062.5U Active CN214356269U (en) | 2020-12-29 | 2020-12-29 | B-pillar joint structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214356269U (en) |
-
2020
- 2020-12-29 CN CN202023276062.5U patent/CN214356269U/en active Active
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