KR20240046973A - Bulkhead joint structure for vehicle body and assembly method thereof - Google Patents

Abstract

A bulkhead coupling structure for an automobile body is disclosed. The bulkhead coupling structure for a vehicle body according to an exemplary embodiment of the disclosed invention has at least one bulkhead coupled inside the closed cross sections of the first member and the second member joined to each other to form a closed section, i) a first bulkhead bracket joined to the first closed section forming surface of the first member, and ii) a second bulk joined to the second closed section forming surface of the second member and overlapping the first bulkhead bracket. May include a head bracket.

Description

Bulkhead joint structure for vehicle body and assembly method thereof {BULKHEAD JOINT STRUCTURE FOR VEHICLE BODY AND ASSEMBLY METHOD THEREOF}

Embodiments of the present invention relate to the body of a vehicle, and more specifically, to a bulkhead coupling structure for a vehicle body in which a bulkhead is coupled to the inside of a vehicle body member with a closed cross-section to mount various parts on the vehicle body, and to an assembly method thereof.

In general, a car body may be composed of a plurality of car body members and a plurality of car body panels to ensure rigidity or strength. Here, the plurality of car body members may be designed with various dimensions and structures to meet the conditions (eg, rigidity, strength, durability, etc.) required for each part of the car body.

In one example, most of the car body members constituting the car body may have a closed cross-sectional shape with a closed section formed inside to satisfy weight and rigidity. These body members have one member and another member joined together to form a closed section.

Meanwhile, the car body member having a closed cross-sectional shape as described above distributes the input load, and at least one bulkhead is coupled to the closed section to reinforce the rigidity of the car body member. Furthermore, at least one bulkhead also serves to reinforce the mounting rigidity and connection rigidity of various components mounted on the vehicle body member.

In one example of the prior art, at least one bulkhead is spot welded to one member, and one member is spot welded to another member. Here, the other member is not bonded to at least one bulkhead, but is bonded to only one member.

In another example of the prior art, for mounting various parts to a car body member via at least one bulkhead. At least one bulkhead to which pipe nuts are coupled is joined to one member by spot welding, and one member is joined to another member by spot welding. Here again, the other member is not connected to at least one bulkhead, but is connected to only one member.

Therefore, in the prior art as described above, the load is concentrated only on one member to which at least one bulkhead is joined, which may cause local plastic deformation and a decrease in durability of the vehicle body member.

The matters described in this background art section have been written to improve understanding of the background of the invention, and may include matters that are not prior art already known to those skilled in the art in the field to which this technology belongs.

Embodiments of the present invention provide a bulkhead coupling structure for a vehicle body that can distribute the load input to the vehicle body member to the entire closed cross-section of the vehicle body member and a method of assembling the same.

The bulkhead coupling structure for a car body according to an embodiment of the present invention has at least one bulkhead coupled inside the closed cross-section of the first member and the second member joined to each other to form a closed section, i) the first member a first bulkhead bracket joined to the first closed section forming surface of one member; ii) a second bulkhead joined to the second closed section forming surface of the second member and overlapping the first bulkhead bracket; May include brackets.

In addition, the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention may further include a guide pipe joined to the first bulkhead bracket to support the first closed section forming surface of the first member. .

Additionally, the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention may further include a weld nut joined to the second bulkhead bracket at a position corresponding to the guide pipe.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the first bulkhead bracket has a first joining plan formed on an edge portion to be joined to the first closed section forming surface of the first member. May include branches.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the second bulkhead bracket has a second joining plan formed on an edge portion to be joined to the second closed section forming surface of the second member. May include branches.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the first bulkhead bracket may include a first boss portion to which the guide pipe is joined.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the second bulkhead bracket is disposed inside the first boss portion and may include a second boss portion to which the weld nut is joined. .

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the first member may include a first bolt fastening hole connected to one end of the guide pipe.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the first boss portion may include a second bolt fastening hole connected to the other end of the guide pipe.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the second boss portion may include a third bolt fastening hole connected to the second fastening bolt hole and the weld nut.

In addition, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the first bolt fastening hole, the second bolt fastening hole, and the third bolt fastening hole are configured such that the fastening bolt is fastened to the weld nut. It may be arranged on a straight line according to the fastening direction of the fastening bolt.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, parts may be mounted on the first member by fastening bolts fastened to the weld nut through the guide pipe.

Additionally, in the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, the component may include a door link.

In addition, the method of assembling a bulkhead coupling structure for a car body according to an embodiment of the present invention assembles a bulkhead coupling structure for a car body in which at least one bulkhead is coupled to the inside of a car body member including a first member and a second member. A method comprising: (a) bonding a first bulkhead bracket to a first closed section forming surface of the first member; (b) attaching a second bulkhead bracket to a second closed section forming surface of the second member; A process of joining, and (c) a process of joining the first member and the second member to form a closed section in which the first bulkhead bracket and the second bulkhead bracket are disposed.

In addition, in the method of assembling the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, in the process (a), a guide pipe is joined to the first boss formed in the first bulkhead bracket, and the first boss is formed in the first bulkhead bracket. 1 A bulkhead bracket can be attached to the first closed section forming surface.

Additionally, in the method of assembling the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, in the process (b), a weld nut is joined to the second boss portion formed on the second bulkhead bracket, and the 2 A bulkhead bracket can be attached to the second closed section forming surface.

Additionally, in the method of assembling the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention, in the process (c), the first bulkhead bracket and the second bulkhead bracket are connected to the first bulkhead bracket. The first boss portion formed on the first boss portion and the second boss portion formed on the second bulkhead bracket may overlap each other in the closed section.

Embodiments of the present invention distribute the load input to the car body member to the entire closed cross-section of the car body member through the first bulkhead bracket and the second bulkhead bracket, thereby securing the durability performance and load input point rigidity of the car body member. You can.

In addition, effects that can be obtained or expected due to embodiments of the present invention will be disclosed directly or implicitly in the detailed description of the embodiments of the present invention. That is, various effects expected according to embodiments of the present invention will be disclosed in the detailed description to be described later.

Since these drawings are for reference in explaining exemplary embodiments of the present invention, the technical idea of the present invention should not be interpreted as limited to the attached drawings.
Figure 1 is a combined perspective view showing a bulkhead combined structure for a vehicle body according to an embodiment of the present invention.
2 and 3 are exploded perspective views showing a bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 4 is a coupled cross-sectional view showing a bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 5 is a perspective view showing the coupling structure of the first member and the first bulkhead bracket applied to the bulkhead coupling structure for an automobile body according to an embodiment of the present invention.
Figure 6 is an exploded perspective view showing the coupling structure of the first member and the first bulkhead bracket applied to the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 7 is a perspective view showing the coupling structure of the second member and the second bulkhead bracket applied to the bulkhead coupling structure for an automobile body according to an embodiment of the present invention.
Figure 8 is an exploded perspective view showing the coupling structure of the second member and the second bulkhead bracket applied to the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 9 is a cross-sectional view showing the component mounting structure of the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 10 is an exploded perspective view showing a coupling structure of a first bulkhead bracket and a guide pipe applied to the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
Figure 11 is an exploded perspective view showing the coupling structure of a second bulkhead bracket and a weld nut applied to the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.
The drawings referenced above are not necessarily drawn to scale and should be understood as presenting a rather simplified representation of various preferred features illustrating the basic principles of the invention. The specific design features of the invention, including, for example, specific dimensions, orientation, location, and shape, will be determined in part by the particular intended application and usage environment.

Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein.

The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the disclosure. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates otherwise.

As used herein, the terms 'comprise' and/or 'comprising' indicate the presence of specified features, integers, steps, operations, elements and/or components, but may also include one or more other features, integers or steps. It should also be understood that this does not exclude the presence or addition of elements, operations, components, and/or groups thereof. As used herein, the term 'and/or' includes any one or all combinations of one or more items listed in association. In this specification, the term 'coupled' refers to two components in which the components are directly connected to each other by welding, SPR (Self Piercing Rivet), FDS (Flow Drill Screw), structural adhesive, etc., or indirectly connected through one or more intermediate components. Displays the physical relationship between components.

As used herein, 'vehicle', 'vehicle', 'automobile' or other similar terms used herein generally include passenger vehicles, sport utility vehicles (SUVs), buses, trucks, and various commercial vehicles. Passenger automobiles, including hybrid vehicles, electric vehicles, hybrid electric vehicles, electric vehicle-based PBV vehicles (Purpose Built Vehicles), hydrogen-powered vehicles, and other alternative fuel vehicles (e.g., derived from resources other than oil) fuel).

Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a combined perspective view showing a bulkhead combined structure for a vehicle body according to an embodiment of the present invention.

Referring to FIG. 1, the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention is used for a vehicle body, and further, for a Purpose Built Vehicle (hereinafter referred to as a 'PBV vehicle'). Can be applied to car body.

The PBV vehicle can be used as an electric vehicle-based life module vehicle that provides various services to passengers while traveling from the ground to the destination through unmanned autonomous driving. The life module vehicle described above is also commonly referred to as a 'robo taxi', 'robo shuttle', or 'hailing vehicle' by those skilled in the art.

Such a PBV vehicle can be produced as a one box design with a spacious interior. Additionally, the PBV vehicle may be equipped with facing-type seats to provide a large interior space.

The body of the PBV vehicle includes a skateboard-type underbody (not shown) (commonly referred to as a 'rolling chassis' or 'chassis frame' by those skilled in the art) and an upper body assembled to the underbody.

A drive motor (not shown), etc. may be mounted on the underbody. Additionally, the upper body is a BIW body that is coupled to the underbody, and can form a cabin with a large interior space.

In this specification, the 'top', 'top', 'top' or 'top surface' of a component refers to the end, portion, edge, or face of the component that is relatively on the upper side in the drawing, and the 'bottom' of the component ', 'bottom', 'bottom' or 'lower surface' refers to the end, portion, stage, or face of a component that is relatively lower in the drawing.

Furthermore, in this specification, an end of a component (e.g., one end, another end, or both ends, etc.) refers to the end of the component in any one direction, and an end of the component (e.g., one end, the other end, both ends, front end, or rear end, etc.) represents a portion of the component containing that end.

Meanwhile, in the body of the PBV vehicle as described above, the upper body includes side structures provided on both sides along the vehicle width direction.

Furthermore, the PBV vehicle has a single-door or double-door swing door applied to the vehicle body in order to provide users with a wide boarding and disembarking space. The swing door may be rotatably mounted on the upper part (eg, roof side) and lower part (eg, side sill) of the side structure through a door link.

Furthermore, high weight and high load parts (eg, design parts), such as a battery assembly, may be mounted on the side sill of the lower part of the side structure.

The bulkhead coupling structure 100 for a car body according to an embodiment of the present invention is applied to the car body member 10 of the upper body that is designed to mount high weight and high load parts such as the swing door and battery assembly as described above. You can.

Here, the vehicle body member 10 includes a first member 11 and a second member 12 each molded into a set shape. For example, the first member 11 may be named an outer member, and the second member 12 may be named an inner member. The first member 11 and the second member 12 are joined to each other by spot welding known to those skilled in the art, and may be composed of a car body member 10 with a closed cross-section in which a closed section 15 is formed.

Figures 2 and 3 are exploded perspective views showing a bulkhead coupling structure for a car body according to an embodiment of the present invention, and Figure 4 is an exploded cross-sectional view showing a bulkhead coupling structure for a car body according to an embodiment of the present invention.

Referring to Figures 2 to 4, the bulkhead coupling structure 100 for a car body according to an embodiment of the present invention has at least one bulkhead assembly 30 coupled to the inside of a car body member 10 formed with a closed cross-section. there is.

In an embodiment of the present invention, the at least one bulkhead assembly 30 reinforces the rigidity of the vehicle body member 10 and distributes the load input to the vehicle body member 10.

The at least one bulkhead assembly 30 is disposed in a closed section 15 between the first member 11 and the second member 12, and is located inside the first member 11 and the second member 12. It can be joined to the surface by spot welding.

As described above, the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention transfers the load input to the vehicle body member 10 to the closed cross section of the vehicle body member 10 through at least one bulkhead assembly 30. It is distributed to all parts and is structured to ensure the durability of the car body member 10 and the rigidity of the load input point.

To this end, in the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention, the at least one bulkhead assembly 30 includes a first bulkhead bracket 31 and a second bulkhead bracket 41. I'm doing it.

Figure 5 is a perspective view showing the coupling structure of the first member and the first bulkhead bracket applied to the bulkhead coupling structure for a car body according to an embodiment of the present invention, and Figure 6 is a coupling structure for a car body according to an embodiment of the present invention. This is an exploded perspective view showing the coupling structure of the first member and the first bulkhead bracket applied to the bulkhead coupling structure.

Referring to Figures 5 and 6, in an embodiment of the present invention, the first bulkhead bracket 31 is joined to the first closed section forming surface 21 of the first member 11. The first closed section forming surface 21 may be defined as the inner surface of the first member 11 forming the closed section 15 of the vehicle body member 10, based on FIG. 4 .

Here, the first member 11 may have a cross-sectional shape of approximately 'ㄷ'. In addition, the first member 11 includes first joining ribs 16 formed on both sides along the longitudinal direction, and a concave or convex first forming part 17 extending from the first joining rib 16. It includes.

The first bulkhead bracket 31 according to an embodiment of the present invention includes a first member reinforcement part 32, a second member reinforcement part 33, a third member reinforcement part 34, and a first joint flange part ( 35), and includes a first boss portion (36).

The first member reinforcement portion 32 is provided in a plate shape crossing the first joining rib 16 of the first member 11, and can be joined to the first joining rib 16 by spot welding.

The second member reinforcement portion 33 extends from one side of the first member reinforcement portion 32 along the longitudinal direction of the first member 11. The second member reinforcement part 33 is provided in a plate shape corresponding to the cross-sectional shape of the first forming part 17, and can be joined to the first forming part 17 by spot welding.

The third member reinforcement portion 34 extends from the other side of the first member reinforcement portion 32 along the longitudinal direction of the first member 11. The third member reinforcement part 34 is provided in a plate shape corresponding to the cross-sectional shape of the first forming part 17, and is attached to the first forming part 17 at a position corresponding to the second member reinforcement part 33. Can be joined by spot welding.

The first joining flange portion 35 is formed at the edge of the first bulkhead bracket 31 to be joined to the first closed section forming surface 21 of the first member 11. The first joint flange portion 35 is formed at the edges of the first member reinforcement portion 32, the second member reinforcement portion 33, and the third member reinforcement portion 34.

And, the first boss portion 36 is formed on the first member reinforcement portion 32. The first boss portion 36 is formed in a shape that protrudes from the first member reinforcement portion 32 toward the first closed section forming surface 21 of the first member 11.

In an embodiment of the present invention, the first member 11 and the first bulkhead bracket 31 as described above are joined to each other and may be configured as a first member assembly that is part of the vehicle body member 10.

Figure 7 is a perspective view showing the coupling structure of the second member and the second bulkhead bracket applied to the bulkhead coupling structure for a car body according to an embodiment of the present invention, and Figure 8 is a coupling structure for a car body according to an embodiment of the present invention. This is an exploded perspective view showing the coupling structure of the second member and the second bulkhead bracket applied to the bulkhead coupling structure.

Referring to FIGS. 7 and 8 , in an embodiment of the present invention, the second bulkhead bracket 41 is joined to the second closed section forming surface 22 of the second member 12. The second closed section forming surface 22 may be defined as the inner surface of the second member 12 forming the closed section 15 of the vehicle body member 10, based on FIG. 4 .

Here, the second member 12 may have a cross-sectional shape of approximately 'ㄷ'. In addition, the second member 12 includes second joining ribs 18 formed on both sides along the longitudinal direction, and a concave or convex second forming part 19 extending from the second joining rib 18. It includes.

In one example, one of the second bonding ribs 18 on both sides is spot welded to one of the first bonding ribs 16 on both sides of the first member 11 as shown in FIGS. 5 and 6. It can be (see Figure 1). Additionally, the second forming part 19 may be joined to the other one of the first joining ribs 16 on both sides of the first member 11 by spot welding.

The second bulkhead bracket 41 according to an embodiment of the present invention is joined to one side (eg, part) of the second forming portion 19 of the second member 12 by spot welding. As shown in FIG. 4, the second bulkhead bracket 41 may be arranged to overlap the first bulkhead bracket 31.

This second bulkhead bracket 41 includes a second joint flange portion 43 and a second boss portion 45.

The second joining flange portion 43 is formed at an edge portion of the second bulkhead bracket 41 to be joined to the second closed section forming surface 22 of the second member 12.

The second boss portion 45 extends from the second joint flange portion 43 and is formed to protrude upward when referring to the drawing. The second boss portion 45 overlaps the first bulkhead bracket 31, is disposed in a concave portion (e.g., inside) of the first boss portion 36, and overlaps the first boss portion 36. can be placed.

In an embodiment of the present invention, the second member 12 and the second bulkhead bracket 41 as described above are joined to each other and may be configured as a second member assembly, which is another part of the vehicle body member 10.

Figure 9 is a cross-sectional view showing the component mounting structure of the bulkhead coupling structure for a vehicle body according to an embodiment of the present invention.

Referring to FIG. 9, the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention further includes a guide pipe 50 and a weld nut 70 coupled to at least one bulkhead assembly 30, and there is.

The above-described guide pipe 50 and weld nut 70 are designed to mount various parts 1 to the vehicle body member 10 through at least one bulkhead assembly 30. In addition, the at least one bulkhead assembly 30 is designed to reinforce the rigidity of the vehicle body member 10, as well as the mounting rigidity and connection rigidity of the various components 1 mounted on the vehicle body member 10. there is.

Here, the various parts 1 described above may include a door link 3 coupled to the swing door so as to mount the swing door of high weight and load to the vehicle body. However, the various components 1 described above are not limited to including the door link 3 coupled to the swing door, and may also include various design components mounted on the vehicle body member 10, such as a battery assembly.

In an embodiment of the present invention, the guide pipe 50 guides the fastening bolts 80 for fastening various parts 1 to the car body member 10 through the pipe hollow.

The guide pipe 50 is joined to the first bulkhead bracket 31. As shown in FIG. 10, the guide pipe 50 may be joined to the first boss portion 36 of the first bulkhead bracket 31 by welding (eg, projection welding or CO2 welding). Furthermore, the guide pipe 50 may be joined to the upper part of the first boss portion 36, based on FIG. 9.

Here, the guide pipe 50 is formed on the first closed section forming surface 21 in a state in which the first bulkhead bracket 31 is joined to the first closed section forming surface 21 of the first member 11. is intended to support.

Referring to FIG. 9, in an embodiment of the present invention, the weld nut 70 is fastened with a fastening bolt 80 penetrating the guide pipe 50 to mount various parts 1 to the car body member 10. You can. The weld nut 70 is joined to the second bulkhead bracket 41 at a position corresponding to the guide pipe 50.

As shown in FIG. 11, the weld nut 70 may be joined to the second boss portion 45 of the second bulkhead bracket 41 by welding (eg, projection welding or CO2 welding). Furthermore, the weld nut 70 may be joined to the lower part of the second boss portion 45, based on FIG. 9.

Therefore, in the embodiment of the present invention, as shown in FIG. 9, the first member 11 of the car body member 10 is fastened to the weld nut 70 through the guide pipe 50 by the fastening bolt 80. ) can be equipped with various parts (1).

Meanwhile, referring to FIGS. 4 and 9 , the first member 11 as described above includes a first bolt fastening hole 61 connected to one end of the guide pipe 50. In addition, the first boss portion 36 of the first bulkhead bracket 31 as described above includes a second bolt fastening hole 62 connected to the other end of the guide pipe 50.

Furthermore, the second boss portion 45 of the second bulkhead bracket 41 as described above has a third bolt fastening hole 63 connected to the second fastening bolt hole 62 and the weld nut 70. Contains.

Here, the first bolt fastening hole 61, the second bolt fastening hole 62, and the third bolt fastening hole 63 are the fastening bolts (80) so that the fastening bolt 80 is fastened to the weld nut 70. 80) can be arranged on a straight line according to the fastening direction.

Hereinafter, the assembly method and operation of the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 11.

First, in an embodiment of the present invention, a first member 11, a first bulkhead bracket 31, and a guide pipe 50 are provided.

Then, in an embodiment of the present invention, the guide pipe 50 is joined to the first boss portion 36 of the first bulkhead bracket 31 by welding, and the guide pipe 50 is connected to the first bulkhead. The bracket 31 is joined to the first closed section forming surface 21 of the first member 11 by welding.

Here, the first member reinforcement part 32, the second member reinforcement part 33, and the third member reinforcement part 34 of the first bulkhead bracket 31 are connected through the first joint flange part 35. It is joined to the first closed section forming surface 21 of the first member 11.

In addition, the guide pipe 50 supports the first closed section forming surface 21, is connected to the first bolt fastening hole 61 of the first member 11 through one end, and is connected to the first boss through the other end. It is connected to the second bolt fastening hole 62 of the part 36.

Next, in the embodiment of the present invention, the second member 12, the second bulkhead bracket 41, and the weld nut 70 are provided.

Then, in an embodiment of the present invention, the weld nut 70 is joined to the second boss portion 45 of the second bulkhead bracket 41 by welding, and the second bulkhead to which the weld nut 70 is joined is connected. The bracket 41 is joined to the second closed section forming surface 22 of the second member 12 by welding.

Here, the second bulkhead bracket 41 is joined to the second closed section forming surface 22 of the second member 12 through the second joining flange portion 43. And, the weld nut 70 is connected to the third bolt fastening hole 63 of the second boss portion 45.

In the state where the first bulkhead bracket 31 is joined to the first member 11 and the second bulkhead bracket 41 is joined to the second member 12 as described above, in an embodiment of the present invention, The first member 11 and the second member 12 are joined by welding to form a closed section 15 between the first member 11 and the second member 12.

At this time, the first bulkhead bracket 31 and the second bulkhead bracket 41 are disposed in the closed section 15 between the first member 11 and the second member 12. The first bulkhead bracket 31 and the second bulkhead bracket 41 overlap each other through the first boss portion 36 and the second boss portion 45. That is, the second boss portion 45 of the second bulkhead bracket 41 is disposed in the concave portion of the first boss portion 36 of the first bulkhead bracket 31, and the first boss portion 36 may overlap.

Here, the second bolt fastening hole 62 of the first boss part 36 and the third bolt fastening hole 63 of the second boss part 45 are connected to each other.

That is, the first bolt fastening hole 61, the second bolt fastening hole 62, and the third bolt fastening hole 63 as described above are connected to each other through the guide pipe 50 and the weld nut 70. .

Therefore, the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention assembled through a series of processes as described above includes the first bulkhead bracket 31 and the second bulkhead bracket 31 inside the closed cross section of the vehicle body member 10. At least one bulkhead assembly 30 in which two bulkhead brackets 41 are combined can be formed.

Meanwhile, according to the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention, various parts 1 can be mounted on the vehicle body member 10 through at least one bulkhead assembly 30.

In an embodiment of the present invention, various parts 1 are placed on the first member 11 of the car body member 10, fastening bolts 80 are coupled to the various parts 1, and the first bolt fastening hole 61 ) Insert the fastening bolt 80 into the guide pipe 50 and fasten it to the weld nut 70.

Then, in an embodiment of the present invention, the first boss portion 36 of the first bulkhead bracket 31 and the second boss portion of the second bulkhead bracket 41 are connected by the fastening torque of the fastening bolt 80 ( 45) are in close contact with each other, and the guide pipe 50 and the first member 11 are in close contact with each other.

Therefore, in an embodiment of the present invention, the load of various parts 1 input to the vehicle body member 10 can be supported through the first bulkhead bracket 31 and the second bulkhead bracket 41.

According to the bulkhead coupling structure 100 for a vehicle body according to an embodiment of the present invention as described so far, the load (e.g., the load of a high weight part) input to the vehicle body member 10 is connected to the first bulkhead bracket 31. ) and the second bulkhead bracket 41 can be distributed to the entire closed cross-section of the vehicle body member 10.

As a result, the bulkhead coupling structure 100 for a car body according to an embodiment of the present invention can secure the durability performance and load input point rigidity of the car body member 10, and can prevent local plastic deformation and durability of the car body member 10. Deterioration can be prevented.

Although preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and can be implemented with various modifications within the scope of the claims, the detailed description of the invention, and the accompanying drawings, and this can also be done with various modifications. It is natural that it falls within the scope of the invention.

1: Part 3: Door Link
10: body member 11: first member
12: Second member 15: Closed section
16: first joining rib 17: first forming portion
18: second joining rib 19: second forming part
21: first closed section forming surface 22: second closed section forming surface
30: Bulkhead assembly 31: First bulkhead bracket
32: first member reinforcement part 33: second member reinforcement part
34: Third member reinforcement portion 35: First joint flange portion
36: 1st boss part 41: 2nd bulkhead bracket
43: second joint flange portion 45: second boss portion
50: Guide pipe 61: First bolt fastening hole
62: 2nd bolt fastening hole 63: 3rd bolt fastening hole
70: Weld nut 80: Fastening bolt
100: Bulkhead coupling structure for vehicle body

Claims (13)

A bulkhead coupling structure for an automobile body, wherein at least one bulkhead is coupled inside a closed cross section of a first member and a second member bonded to each other to form a closed section, comprising:
a first bulkhead bracket joined to a first closed section forming surface of the first member; and
a second bulkhead bracket joined to the second closed section forming surface of the second member and overlapping the first bulkhead bracket;
A bulkhead coupling structure for a vehicle body comprising a. According to claim 1,
A guide pipe joined to the first bulkhead bracket to support the first closed section forming surface of the first member.
Bulkhead coupling structure for a vehicle body further comprising. According to clause 2,
Weld nut joined to the second bulkhead bracket at a position corresponding to the guide pipe
Bulkhead coupling structure for a vehicle body further comprising. According to claim 1,
The first bulkhead bracket is,
A first joining flange portion formed on an edge portion to be joined to the first closed section forming surface of the first member.
A bulkhead coupling structure for a vehicle body comprising a. According to clause 4,
The second bulkhead bracket is,
A second joint flange portion formed on an edge portion to be connected to the second closed section forming surface of the second member.
A bulkhead coupling structure for a vehicle body comprising a. According to clause 3,
The first bulkhead bracket includes a first boss portion to which the guide pipe is joined,
The second bulkhead bracket is disposed inside the first boss portion and includes a second boss portion to which the weld nut is joined. According to clause 6,
The first member includes a first bolt fastening hole connected to one end of the guide pipe,
The first boss portion includes a second bolt fastening hole connected to the other end of the guide pipe,
The second boss portion is a bulkhead coupling structure for a vehicle body including a third bolt fastening hole connected to the second fastening bolt hole and the weld nut. According to clause 7,
The first bolt fastening hole, the second bolt fastening hole, and the third bolt fastening hole are,
A bulkhead coupling structure for a vehicle body disposed on a straight line along the fastening direction of the fastening bolt so that the fastening bolt is fastened to the weld nut. According to clause 3,
Parts are mounted on the first member by fastening bolts fastened to the weld nut through the guide pipe,
The part is a bulkhead coupling structure for a vehicle body including a door link. A method of assembling a bulkhead coupling structure for a vehicle body in which at least one bulkhead is coupled to the interior of a vehicle body member including a first member and a second member, comprising:
(a) a process of joining a first bulkhead bracket to the first closed section forming surface of the first member;
(b) joining a second bulkhead bracket to the second closed section forming surface of the second member; and
(c) joining the first member and the second member to form a closed section where the first bulkhead bracket and the second bulkhead bracket are disposed;
A method of assembling a bulkhead coupling structure for a vehicle body comprising a. According to claim 10,
In process (a) above,
Joining a guide pipe to the first boss formed on the first bulkhead bracket,
A method of assembling a bulkhead coupling structure for a vehicle body by joining the first bulkhead bracket to the first closed section forming surface. According to claim 10,
In process (b) above,
Joining a weld nut to the second boss formed on the second bulkhead bracket,
A method of assembling a bulkhead coupling structure for a vehicle body by joining the second bulkhead bracket to the second closed section forming surface. According to claim 10,
In process (c) above,
The first bulkhead bracket and the second bulkhead bracket,
A method of assembling a bulkhead coupling structure for a vehicle body in which the first boss portion formed on the first bulkhead bracket and the second boss portion formed on the second bulkhead bracket overlap each other in the closed section.

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