KR101978236B1 - Front side member - Google Patents

Abstract

A front side member is disclosed. According to an embodiment of the present invention, the front side member is arranged along a vehicle body longitudinal direction at both sides of the front of a vehicle body, and comprises: a front member formed with an aluminum extruded material; a rear member formed by roll forming; and internal and external connection members connecting the front member and the rear member at internal and external sides. The front side member more comprises: internal and external fastening units fastened to each side mutually corresponding to the internal and external connection members; a reinforcing pipe fixated in a state in which a front end is inserted into the internal and external fastening units at an external side of the external connection member; and a reinforcing member fixated to the reinforcing pipe at an external side of the external connection member, and bonded through a flange on a lower surface of the external connection member.

Description

Front side member {FRONT SIDE MEMBER}

The present invention relates to a front side member, and more particularly, to a front side member capable of reinforcing rigidity while being lightweight.

In general, the front side member of the vehicle body is a core structure that forms the front frame of the vehicle body, and the design and manufacturing requirements of the front side member are as follows.

First, the front side member must secure the strength and rigidity that can support the load of the weight body such as engine and transmission.

Second, the front side member should secure sufficient strength and rigidity against road loads transmitted through the suspension.

Third, the front side member should secure sufficient design freedom so that interference between the tire and the vehicle body does not occur with respect to bumping and turning behavior through the suspension.

Fourth, the front side member should be designed to have a structure that can efficiently absorb the collision energy during high-speed collision.

Fifth, the front side member should secure rigidity so that body deformation does not occur during a low-speed collision.

In particular, the fourth high-speed collision performance, and the fifth low-speed collision performance, the manufacturing process of the front side member, the US-NCAP (North America) law, which is the representative collision law of the automobile industry, and the Research Council for Automobile Repairs: The demands and interests of consumers are being concentrated in terms of satisfying the regulations of the Korea Automobile Repair and Technology Commission, protecting passengers and improving repair costs.

In order to satisfy this collision performance, a plurality of reinforcing members are applied to the side of the front side member.

On the other hand, in the automotive industry, the manufacturing of car body parts using aluminum material instead of steel material is a trend to reduce the weight.

However, when the front side member and the reinforcing member are applied to a steel material, the collision performance and cost are low, but there is a disadvantage that the weight is high. There is a disadvantage.

While reinforcing this problem, research and development are needed to improve the collision performance of the front side member.

The matters described in this Background section are intended to enhance the understanding of the background of the invention, and may include matters not previously known to those of ordinary skill in the art.

In an embodiment of the present invention, the front member and the connecting member are formed of an aluminum material for light weight, and the rear member, the reinforcing pipe, and the reinforcing member are formed of a steel material for rigidity, between the connecting member and the reinforcing pipe. It is made of a structure that applies the inner and outer fastening unit to facilitate the assembly between the parts, and at the same time to provide a front side member to prevent corrosion between each part.

In one or more embodiments of the present invention, in the front side member disposed on both sides of the vehicle body along the vehicle body longitudinal direction, the front side member is a front member formed of aluminum extrusion material, a rear member formed by roll forming, and the front Inner and outer connecting members for connecting the member and the rear member in the inner, outer, and the inner and outer fastening unit fastened to each of the corresponding side of the inner and outer connection member, the outer side of the outer connection member And a reinforcing pipe fixed to the inner and outer fastening units in a state where the tip is fitted, and a reinforcing member fixed to the reinforcing pipe at an outer side of the outer connecting member and joined to a bottom surface of the outer connecting member via a flange. You can provide a front side member.

In addition, the inner and outer fastening units have fastening holes respectively formed in correspondence with inner and outer connecting members, through bolts fastened to the fastening holes, through sleeves disposed in the inner diameter of the through bolts, and the through holes. It may be made of an adhesive for adhering the through bolt and the through sleeve applied between the bolt and the through sleeve.

In addition, the through bolt may be screwed into each of the fastening holes formed in the inner and outer connection member is formed with a screw tab on the outer peripheral surface.

In addition, the through bolt may be integrally formed with a support flange at one end so as to be supported in a fastened state to each of the fastening holes formed in the inner and outer connection members.

In addition, the through bolt may be made of aluminum, and the through sleeve may be made of steel.

In addition, the adhesive may be formed between the through bolt and the through sleeve, the structural adhesive is introduced into and adhered to the plurality of inlet holes formed on the through bolt and the through sleeve.

In addition, the reinforcement pipe may be made of a steel material, one end of which is fitted to each through sleeve of the inner and outer fastening units, and the other end may be press-molded to the fastening end to be fastened to one side of the reinforcing member.

In an embodiment of the present invention, the front member and the connecting member are formed of an aluminum material for light weight, and the rear member, the reinforcing pipe, and the reinforcing member are formed of a steel material for rigidity, between the connecting member and the reinforcing pipe. The inner and outer fastening units are configured to facilitate assembly between the parts, and to prevent corrosion between the parts.

That is, the embodiment of the present invention can reduce the weight and at the same time reinforce the rigidity, to prevent corrosion to improve the corrosion resistance.

In addition, the effects that can be obtained or predicted by the 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 predicted according to an embodiment of the present invention will be disclosed in the detailed description to be described later.

1 is an assembled perspective view of a front side member according to an embodiment of the present invention.
2 is an exploded perspective view of the front side member according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA of FIG. 1.
Figure 4 is an exploded perspective view of the reinforcing member applied to the front side member 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 so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Parts not related to the description are omitted in order to clearly describe the present invention, and the same or similar elements will be described with the same reference numerals throughout the specification.

1 is an exploded perspective view of a front side member according to an embodiment of the present invention, Figure 2 is an exploded perspective view of the front side member according to an embodiment of the present invention, Figure 3 is a cross-sectional view taken along line AA of Figure 1, 4 is an exploded perspective view of the reinforcing member applied to the front side member according to the embodiment of the present invention.

Front side members according to an embodiment of the present invention is disposed symmetrically in the same shape along the vehicle body longitudinal direction on both sides of the vehicle front.

1 to 3, in this specification, one front side member 1 is described as an example among the two front side members 1.

The front side member 1 includes the front member 10, the rear member 20, the connecting member 30, the inner and outer fastening units 40a and 40b, the reinforcing pipe 50, and the reinforcing member 60. Include.

First, the front member 10 is connected to the rear side of a bumper beam (not shown) disposed in the vehicle width direction in front of the vehicle.

The front member 10 is formed of aluminum extruded material for weight reduction.

The rear member 20 is disposed at the rear side of the front member 10 and connected to a side seal (not shown) of the vehicle.

The rear member 20 is made of a steel material is formed through roll forming molding.

The connection member 30 is configured between the front member 10 and the rear member 20 to interconnect the front member 10 and the rear member 20.

The connection member 30 consists of an inner connection member 30a and an outer connection member 30b to connect the front member 10 and the rear member 20 from inside and outside, respectively.

In addition, the connection member 20 is made of aluminum.

The inner and outer fastening units 40a and 40b are mounted to fastening holes 31 formed at respective one sides of the inner and outer connecting members 30a and 30b, respectively.

These inner and outer fastening units 40a and 40b are made of a through bolt 41, a through sleeve 45, and an adhesive 47, as shown in FIG. 4.

The inner and outer fastening units 40a and 40b will be described in more detail as follows.

The through bolts 41 are fastened to the respective fastening holes 31 of the inner and outer connecting members 30a and 30b.

That is, screw tabs are formed on the outer circumferential surfaces of the respective fastening holes 31 and the through bolts 41, and are fastened to each other through the respective screw tabs.

One end of the through bolt 41 is integrally formed with a support flange 43.

At this time, the support flange 43 is to be supported in a state that is fastened to each fastening hole 31 formed in the inner and outer connection members (30a, 30b).

In addition, the through bolt 41 is made of the same aluminum material as the connection member 30.

And the through sleeve 45 is disposed in the inner diameter of the through bolt 41.

In addition, the through sleeve 45 may be integrally formed with a support flange 43 at one end similarly to the through bolt 41.

This through sleeve 45 is made of steel.

The adhesive 47 is applied between the through bolt 41 and the through sleeve 45 to bond the through bolt 41 and the through sleeve 45 to each other.

At this time, the adhesive 47 is introduced into and adhered to the plurality of inflow holes H formed on the through bolt 41 and the through sleeve 45.

In other words, the adhesive 47 is interposed between the through bolt 41 and the through sleeve 45 and between the plurality of inflow holes H formed in the through bolt 41 and the through sleeve 45, respectively. Flows in between to further improve adhesion.

The adhesive 47 has been described as an example in which a structural adhesive is applied between the through bolt 41 and the through sleeve 45, but is not necessarily limited thereto, and is formed of an adhesive tape formed in a ring shape to form the through bolt. It may be interposed between the 41 and the through sleeve 45.

On the other hand, the reinforcement pipe 50 is joined to the inner and outer fastening units 40a, 40b in a state where the front end is fitted in the outer side of the outer connecting member 30a.

In other words, the reinforcement pipe 50 has one end fitted to each of the through sleeves 45 of the inner and outer fastening units 40a and 40b, and the other end is press-molded with the fastening end 51. It is fastened with one side of the reinforcement member 60 to be described.

Here, the fastening end 51 has a bolt hole 53 for fastening with the reinforcing member 60 is formed.

The reinforcement pipe 50 is made of a steel material in the same manner as the through sleeve 45.

Finally, the reinforcing member 60 is fixed with the reinforcing pipe 50 in the outer side of the outer connecting member 30b.

In this case, a seating surface 61 is formed in the reinforcing member 60 along the shape of the fastening end 51 such that the fastening end 51 of the reinforcing pipe 50 is seated.

This reinforcing member 60 is joined to the lower surface of the outer connecting member 30b through a joining flange 63.

That is, the reinforcing member 60 is mechanically fastened with the reinforcing pipe 50 and welded to the outer connecting member 30b.

Therefore, the front side member 1 according to the embodiment of the present invention forms the front member 10 and the connection member 30 of aluminum material for light weight, and the rear member 20 and the reinforcement pipe 50 for rigidity. ), And the reinforcing member 60 is formed of a steel material, the inner and outer fastening units (40a, 40b) is applied to facilitate the assembly between the parts, and to prevent corrosion between the parts.

In other words, the inner and outer fastening units 40a and 40b form a through bolt 41 fastened to the connection member 30 by using an aluminum material, and a through sleeve 45 to be joined to the reinforcement pipe 50. Is formed of a steel material, by interposing the adhesive 47 between the through bolt 41 and the through sleeve 45, to prevent galvanic corrosion between the through bolt 41 and the through sleeve 46. At the same time, it is possible to satisfy the improvement of the fastening force between the connection member 30 and the reinforcement pipe 50 and the galvanic corrosion prevention effect.

That is, the front side member 1 according to the embodiment of the present invention can reduce the weight and at the same time reinforce the rigidity, while preventing corrosion between the components to improve the corrosion resistance.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

1: front side member 10: front member
20: rear member 30: connection member
30a: inner connecting member 30b: outer connecting member
31: fastening hole 40a: inner fastening unit
40b: outer fastening unit 41: through bolt
43: support flange 45: through sleeve
47: adhesive H: inlet hole
50: reinforcing pipe 51: fastening end
53: bolt hole 60: reinforcement member
61: seating surface 63: joint flange

Claims (7)

In the front side member disposed on both sides of the vehicle body along the vehicle body longitudinal direction,
The front side member
A front member formed of aluminum extrusion material;
A rear member roll formed; And
Inner and outer connection members for connecting the front member and the rear member from the inside, the outside,
Inner and outer fastening units fastened to respective one sides of the inner and outer connecting members;
A reinforcing pipe fixed to the inner and outer fastening units in a state where the tip is fitted in the outer side of the outer connecting member; And
A reinforcing member fixed to the reinforcing pipe at an outer side of the outer connecting member and joined to a lower surface of the outer connecting member through a joining flange;
Front side member including more. The method of claim 1,
The inner and outer fastening unit
Fastening holes are respectively formed in correspondence with the inner and outer connection members,
Through bolts fastened to the respective fastening holes;
A through sleeve disposed in the inner diameter portion of the through bolt; And
An adhesive for mutually bonding the through bolt and the through sleeve applied between the through bolt and the through sleeve;
The front side member which consists of. The method of claim 2,
The through bolt is
A screw thread is formed on an outer circumferential surface of the front side member to be screwed into each of the fastening holes formed in the inner and outer connecting members. The method of claim 2,
The through bolt is
And a support flange integrally formed at one end thereof so as to be supported by being fastened to each of the fastening holes formed in the inner and outer connection members. The method of claim 2,
The through bolt is made of an aluminum material, the through sleeve is a front side member made of a steel material. The method of claim 2,
The adhesive
Between the through bolt and the through sleeve, a front side member consisting of a structural adhesive flowing into and fixed to a plurality of inlet holes formed on the through bolt and the through sleeve. The method of claim 1,
The reinforcement pipe is
A front side member made of a steel material, one end of which is fitted into each of the through sleeves of the inner and outer fastening units, and the other end is press-molded into the fastening end to be fastened to one side of the reinforcing member.

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