KR20170024383A - Vehicle body fastening structure - Google Patents

Abstract

A vehicle body fastening structure is disclosed. The disclosed vehicle body fastening structure fastens a first vehicle body member and a second vehicle body member forming a vehicle body, and can comprise: a mounting bracket joined to the first vehicle body member; a mounting bolt coupled to the mounting bracket and fastened to the second vehicle body member; and a support member formed in a mounting bolt coupling portion of the mounting bracket, and supporting the mounting bracket and the mounting bolt.

Description

Vehicle body fastening structure < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a body member fastening structure, and more particularly, to a body member fastening structure capable of tightly fastening a side member and a subframe constituting a vehicle body.

 2. Description of the Related Art Generally, a vehicle body of a vehicle includes a passenger compartment in which a plurality of body members are fastened, connected, or combined with each other so that occupants can reside, an engine room in which vehicle- And a trunk room which can be used.

It is necessary to improve the stability of the vehicle body and the riding comfort of the occupant by increasing the tightening rigidity when the vehicle body is formed by fastening a plurality of body members to each other. In particular, the vehicle body is formed to extend along the longitudinal direction of the vehicle, The side members disposed on both the left and right sides along the direction of the vehicle body and the subframe on which the chassis component is mounted and supported are arranged in such a manner that the vibration and shock generated during the running of the vehicle are insulated It is very important in terms of performance improvement.

For example, in the prior art, there is provided a mounting bracket fixed to a side member for fastening a side member and a sub frame, and a mounting bolt provided on the mounting bracket. Here, the mounting bracket is assembled by spot welding to the side member, and the mounting bolt is assembled by CO2 welding to the mounting bracket.

However, in the prior art, since the mounting bolt is mounted on the mounting bracket and the mounting bolt is assembled to the mounting bracket by CO2 welding, the position of the mounting bolt may be scattered to the mounting bracket, It is difficult to enter the welding torch and quality problems such as welding defects may occur due to the surface condition of the mounting bolt joint portion and other factors such as temperature, current, and voltage.

In addition, in the prior art, a reinforcing member or the like is attached to the periphery of the mounting bolt in order to increase the fastening rigidity or the input point stiffness. However, it is difficult to effectively cope with the external impact or load input to the front direction, And the workability was also unsatisfactory.

The matters described in the above background section are intended to enhance understanding of the background of the invention and may include matters not previously known to those having ordinary skill in the art to which the present invention belongs.

Embodiments of the present invention can solve the quality problems such as occurrence of positional scattering and weld defect by eliminating CO2 welding and improve the rigidity of the side members constituting the vehicle body and the input point rigidity of the subframe, .

The body member fastening structure according to an embodiment of the present invention is a fastening structure for fastening a first body member and a second body member constituting a body to each other by i) a mounting bracket bonded to the first body member, and ii) And a support member for supporting the mounting bracket and the mounting bolt, the mounting bolt being coupled to the mounting bolt of the mounting bracket.

Further, in the vehicle body member assembly according to the embodiment of the present invention, the first body member may be a side member extending along the longitudinal direction of the vehicle, and the second body member may be a sub- Frame.

Further, in the body member fastening structure according to the embodiment of the present invention, the first body member includes a member body formed to extend in the height direction of the vehicle, an upper flange formed along the upper and lower edges of the member body, And may include a flange.

Further, in the body member fastening structure according to an embodiment of the present invention, the mounting bracket may be made of a steel material and may be joined to a lower flange bottom surface of the first body member.

In addition, in the body member fastening structure according to an embodiment of the present invention, the mounting bracket is made of a steel material and can be joined to the lower flange bottom surface of the first body member by a self-piercing rivet.

Further, in the body member fastening structure according to the embodiment of the present invention, the mounting bracket may be formed with a joint flange to be self-pierced rivet-joined to the lower flange bottom surface of the first body member.

Further, in the body member fastening structure according to the embodiment of the present invention, the mounting bracket may be provided with a bolt coupling portion in the form of a groove.

Further, in the body member fastening structure according to the embodiment of the present invention, the mounting bolt may be inserted into the bolt coupling portion, and an insertion hole for supporting the head portion may be formed.

In addition, in the body member fastening structure according to an embodiment of the present invention, the support member is made of aluminum and can be die-cast formed on the mounting bracket.

In addition, in the body member fastening structure according to the embodiment of the present invention, the support member is made of aluminum and can be die-cast formed on the bolt connecting portion of the mounting bracket.

Further, in the body member fastening structure according to an embodiment of the present invention, the support member can be die-cast formed on the bolt coupling portion in a state where the mounting bolt is inserted into the insertion hole of the bolt coupling portion.

Further, in the body member fastening structure according to the embodiment of the present invention, the support member may be disposed between the lower surface of the lower flange and the bolt coupling portion.

In addition, in the body member fastening structure according to the embodiment of the present invention, the support member may be provided with a lattice-shaped reinforcing partition.

The embodiments of the present invention can reduce the weight of the vehicle body by fixing the mounting bolts to the mounting brackets through the die-cast aluminum-made support members, increase the joint rigidity between the side members and the subframe, It is possible to increase the rigidity of the input member of the side member and the subframe, thereby improving the driving stability and ride comfort of the vehicle.

In addition, in the embodiment of the present invention, CO2 welding for bonding the mounting bolts to the mounting brackets can be eliminated, thereby improving quality problems such as occurrence of positional scattering and weld defect, reducing initial investment costs, The cycle time of the process can be reduced.

These drawings are for the purpose of describing an exemplary embodiment of the present invention, and therefore the technical idea of the present invention should not be construed as being limited to the accompanying drawings.
1 is an exploded perspective view showing a body member fastening structure according to an embodiment of the present invention.
2 is an assembled perspective view illustrating a body member engaging structure according to an embodiment of the present invention.
3 is a cross-sectional view illustrating a body member fastening structure according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view illustrating a joining structure of a mounting bracket applied to a vehicle body fastening structure according to an embodiment of the present invention. FIG.
5 is a view for explaining a process of assembling a body member fastening structure according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

In the following detailed description, the names of components are categorized into the first, second, and so on in order to distinguish the components from each other in the same relationship, and are not necessarily limited to the order in the following description.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

It should be noted that terms such as " ... unit ", "unit of means "," part of item ", "absence of member ", and the like denote a unit of a comprehensive constitution having at least one function or operation it means.

2 is an assembled perspective view illustrating a body member fastening structure according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of the cross- .

1 to 3, a vehicle body fastening structure 100 according to an embodiment of the present invention is constructed by fastening members constituting a vehicle body to each other. For example, the side member 100, which is formed to extend along the longitudinal direction of the vehicle, It is possible to fasten the first body member 10 serving as a chassis member and the second body member 20 serving as a sub frame supporting the chassis components to each other.

The body member fastening structure 100 according to the embodiment of the present invention may be assembled to the first body member 10 as a single piece assembly combining the components described below.

The first body member 10 includes a member body 11 formed to extend in the height direction of the vehicle and an upper flange 13 and a lower flange 15 formed along the upper and lower edges of the member body 11, . The second body member 20 can be fastened to the first body member 10 through bolts and nuts.

The body member fastening structure 100 according to the embodiment of the present invention can solve the quality problems such as positional dispersion of the fastening parts and welding defect by eliminating CO2 welding, So that the rigidity can be increased.

For this, the body member fastening structure 100 according to the embodiment of the present invention basically includes a mounting bracket 30, a mounting bolt 50, and a support member 70, same.

In the embodiment of the present invention, the mounting bracket 30 is attached to the lower flange 15 of the first body member 10 and is made of a steel material. The lower flange 15 of the first body member 10 15).

For example, the mounting bracket 30 has a joint flange 31 formed at the edge portion thereof to be joined to the lower face of the lower flange 15 of the first body member 10. [ The mounting bracket 30 forms a concave bolt connecting portion 33 to which a mounting bolt 50 to be described later is coupled. The bolt coupling portion 33 is formed with an insertion hole 35 into which the mounting bolt 50 is inserted.

In this case, the mounting bracket 30 is joined to the lower surface of the lower flange 15 of the first body member 10 through the self-piercing rivet 37 (SPR) as shown in FIG. That is, the joining flange 31 of the mounting bracket 30 can be self-pierced rivet-bonded to the lower face of the lower flange 15 through the self-piercing rivet 37.

The self-piercing rivet joint structure of the mounting bracket 30 and the first body member 10 using the self-piercing rivet 37 as described above is well known in the art, and therefore, a detailed description thereof will be omitted herein .

In the embodiment of the present invention, the mounting bolt 50 is a member for fastening a side member of the first body member 10 and a subframe of the second body member 20, and engages with the mounting bracket 30, And can be fastened to the vehicle body member 20.

The mounting bolt 50 is inserted into the insertion hole 35 of the bolt coupling part 33 inside the bolt coupling part 33 of the mounting bracket 30 and protrudes outward Respectively. The head portion of the mounting bolt 50 supports the edge portion of the insertion hole 35 inside the bolt coupling portion 33.

The supporting member 70 supports the mounting bracket 30 and the mounting bolt 50 and is formed in the bolt fitting portion 33 as the mounting bolt fitting portion of the mounting bracket 30 .

For example, the support member 70 is made of aluminum material and is die-cast from the mounting bracket 30 to the bolt coupling portion 33 to firmly support the mounting bracket 30 and the mounting bolt 50 .

That is, the supporting member 70 is formed such that the mounting bolt 50 is inserted into the insertion hole 35 of the bolt coupling part 33 in the mounting bracket 30, and the head part of the mounting bolt 50 is inserted into the insertion hole 35 35 in the state of being supported by the edge portion.

The die casting molding structure for the mounting bracket 30 of the support member 70 is formed by a known die casting molding structure well known in the art, and thus a detailed description thereof will be omitted herein.

The supporting member 70 is die-cast on the bolt engaging portion 33 of the mounting bracket 30 and the fitting flange 31 of the mounting bracket 30 is engaged with the lower flange of the first body member 10 15, the lower flange 15 and the bolt coupling portion 33 are disposed.

Furthermore, the supporting member 70 according to the embodiment of the present invention may be provided with a grid-shaped reinforcing partition 71. The reinforcing partition wall 71 increases the coupling rigidity of the first and second body members 10 and 20 and improves the coupling property and increases the input point rigidity of the first and second body members 10 and 20. [ .

Hereinafter, a process of assembling the body member assembly 100 according to an embodiment of the present invention will be described in detail with reference to the drawings and the accompanying drawings.

5 is a view for explaining a process of assembling a body member fastening structure according to an embodiment of the present invention.

5, a mounting bracket 30 is provided in the embodiment of the present invention. The mounting bolt 50 is inserted into the bolt fitting portion 33 of the mounting bracket 30 by inserting the bolt fitting portion 33 And is disposed so as to protrude outward. At this time, the head portion of the mounting bolt 50 supports the edge portion of the insertion hole 35 from the inside of the bolt coupling portion 33.

In this state, in the embodiment of the present invention, the aluminum-made support member 70 is die-casted on the bolt-fitting portion 33 of the mounting bracket 30. For example, in the embodiment of the present invention, the assembly of the mounting bracket 30 and the mounting bolt 50 is inserted into the die casting mold and the supporting member 70 is die-casted to the bolt fitting portion 33 of the mounting bracket 30 Can be molded. The supporting member 70 has a reinforcing partition wall 71 and is die-cast on the bolt connecting portion 33 of the mounting bracket 30 to support the mounting bracket 30 and the mounting bolt 50.

In the embodiment of the present invention, when the single piece assembly of the mounting bracket 30 and the mounting bolt 50, which are integrated through the support member 70, is mounted on the lower flange 15 of the first body member 10 .

In the embodiment of the present invention, the joining flange 31 of the mounting bracket 30 is brought into contact with the lower surface of the lower flange 15 of the first body member 10, The joining flange 31 and the lower flange 15 are riveted through the self-piercing rivet 37. The support member 70 supports the lower surface of the lower flange 15 and is positioned between the lower surface of the lower flange 15 and the bolt coupling portion 33 of the mounting bracket 30.

Therefore, in the embodiment of the present invention, the mounting bolt 50 can be firmly fixed to the mounting bracket 30 through the aluminum-made support member 70, which is die-cast formed on the mounting bracket 30.

Accordingly, in the embodiment of the present invention, the second body member 20 as the sub-frame can be fastened to the first body member 10 as the side member through the mounting bolt 50 fixed to the mounting bracket 30 .

According to the vehicle body fastening structure 100 of the present invention as described above, the mounting bolt 50 is fastened to the mounting bracket 30 through the die-cast aluminum support member 70 The weight of the vehicle body can be reduced.

Further, in the embodiment of the present invention, the joining rigidity of the side member and the subframe can be increased and the coupling property can be improved through the support member 70 having the reinforcing partition 71, and the input point stiffness So that the stability and ride comfort of the vehicle can be improved.

Furthermore, unlike the prior art, CO2 welding for joining the mounting bolt 50 to the mounting bracket 30 can be eliminated. Therefore, it is possible to eliminate CO2 welding, The initial investment cost can be reduced, and the cycle time of the entire assembly process can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Other embodiments may easily be suggested by adding, changing, deleting, adding, or the like of elements, but this also falls within the scope of the present invention.

10 ... First body member 11 ... Member body
13 ... upper flange 15 ... lower flange
20 ... second body member 30 ... mounting bracket
31 ... joint flange 33 ... bolt joint portion
35 ... Insertion hole 37 ... Self-Pierced Rivet
50 ... mounting bolt 70 ... supporting member
71 ... reinforcing partition

Claims (12)

A fastening structure for fastening a first body member and a second body member, which constitute a body,
A mounting bracket joined to the first body member;
A mounting bolt coupled with the mounting bracket and fastened to the second body member; And
A supporting member formed at the mounting bolt connecting portion of the mounting bracket and supporting the mounting bracket and the mounting bolt;
Wherein the body member fastening structure includes: The method according to claim 1,
The first body member is a side member formed to extend along the longitudinal direction of the vehicle,
And the second body member is a subframe fastened to the side member. 3. The method of claim 2,
The first body member
A member body formed to extend in a height direction of the vehicle,
And upper and lower flanges formed along the upper and lower edges of the member body. The method of claim 3,
The mounting bracket includes:
Wherein the first body member is made of a steel material and is joined to a lower surface of a lower flange of the first body member. The method of claim 3,
The mounting bracket includes:
Wherein the first body member is joined to the lower flange bottom surface of the first body member by a self-piercing rivet. 6. The method of claim 5,
Wherein the mounting bracket is formed with a joint flange to be self-pierced by a lower flange bottom surface of the first body member. The method according to claim 1,
The mounting bracket is provided with a bolt coupling part in the form of a groove,
Wherein the bolt coupling portion is formed with an insertion hole in which the mounting bolt is fitted and which supports the head portion. The method according to claim 1,
Wherein the support member comprises:
Wherein the base member is made of an aluminum material and is die-cast formed on the mounting bracket. 8. The method of claim 7,
Wherein the support member comprises:
Wherein the base member is made of an aluminum material, and is die-cast formed on the bolt connecting portion of the mounting bracket. 10. The method of claim 9,
Wherein the support member comprises:
Wherein the bolt coupling part is die-cast formed in a state where the mounting bolt is inserted into the insertion hole of the bolt coupling part. 10. The method of claim 9,
Wherein the first body member includes a member body formed to extend in the height direction of the vehicle, an upper flange and a lower flange formed along the upper and lower edges of the member body,
Wherein the mounting bracket has a joint flange joined to a lower surface of the lower flange of the first body member,
Wherein the support member is disposed between the lower surface of the lower flange and the bolt coupling portion. 12. The compound according to any one of claims 1 to 11,
Wherein the support member is provided with a lattice-shaped reinforcing partition.

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