KR20010047982A - Joint for combination use space frame of vehicle - Google Patents

Abstract

PURPOSE: A space frame combining joint expands welded area and improves rigidity of a space frame. CONSTITUTION: A joint comprises a body(21) and a reinforcing part(22). The body is inserted into the members(11, 12) of a space frame. The reinforcing part(22) is formed on the outer surface of the body(21). The contacting point between the members(11, 12) and the body(21) or the reinforcing part(22) is welded. At least a part of the reinforcing part(22) is extended over the bottom surface of the body(21). Penetrating holes(22a) are formed on the reinforcing part(22). More than one reinforcing walls(22b) are formed inside the reinforcing part(22).

Description

Joint for space frame joint of car {JOINT FOR COMBINATION USE SPACE FRAME OF VEHICLE}

The present invention relates to a joint, and more particularly, to a joint for space frame coupling of a vehicle for increasing the coupling strength when the space frame forming the skeleton of the vehicle is coupled to each other.

The frame of a vehicle refers to a skeleton in which a chassis component or a body can be installed. The frame of the vehicle is a driving force, a brake action, a centrifugal force at the time of steering, an impact force from a road surface, a vertical load due to the weight of the vehicle body, and various reaction forces. It must be able to sustain sufficiently from local or total breakage caused by deformation or torsion, tension, compression and vibration caused by it, and it must be structured to sufficiently absorb the collision energy applied to the vehicle in case of collision.

Recently, as the demand for the development of lightweight body of automobiles has emerged, aluminum members have been studied as a major replacement means of existing steel vehicles in automobiles, railways and ships.

In particular, in the case of electric vehicles, it is essential to reduce the weight of the structure in order to bear the huge weight of the battery. Accordingly, the application of aluminum has been developed by various automobile companies, but aluminum has a weight saving effect compared to steel, but is less rigid than steel. Because of the relationship, it is essential to ensure the safety of collision performance.

In the case of the space frame, a plurality of members are welded to each other to form a skeleton, which is advantageous in terms of lightness and rigidity.

Conventional coupling of the space frame is to secure the necessary rigidity by securing the welding line (3) by contacting the end of the one side member 1 to the upper surface of the other member (2), as shown in FIG. As shown in FIG. 2, there is a method of inserting and welding a joint 6 made of a casting between one side member 4 and the other side member 5.

The former has a problem of increasing the vehicle body weight because a larger cross section of the member is required to secure the necessary rigidity, and may cause fatigue failure by concentrating stress on the bonded portion.

In addition, in the latter case, weldability is reduced due to the difference in physical properties between the joint made from the casting and the extruded member constituting the vehicle body, and a high development cost such as mold cost is required.

The present invention devised to solve such a problem is to provide a joint for space frame coupling of the vehicle to secure the desired rigidity even in a member having a small cross section while improving weldability and easy to manufacture at low cost.

1 is a perspective view showing a portion connecting two members in a conventional space frame,

FIG. 2 is a perspective view illustrating a part in which a joint is inserted and connected between two members in a conventional space frame; FIG.

Figure 3 is a perspective view showing a part of the coupling portion of the space frame coupled to the coupling joint according to a preferred embodiment of the present invention,

4 is a perspective view showing a joint for coupling according to the present invention;

5 is a plan view showing a joint for coupling according to the present invention,

Figure 6 is a side view showing a joint for coupling according to the present invention,

7 is a perspective view showing a joint for coupling, which is another embodiment of the present invention;

8 is a perspective view showing a joint for coupling, which is another embodiment of the present invention;

*** Explanation of symbols for the main parts of the drawing ***

10: Joint 11: Vertical member

12: horizontal member

20: joint 21: body

21a: center hole 22: reinforcing part

22a: Through hole 22b: Reinforcing wall

23: welding part

In order to achieve the above object, the present invention is a space frame formed by welding a plurality of members to each other to form a skeleton of the vehicle, the body is inserted into the member and made of a reinforcement formed on the outer surface of the body, the body or reinforcement The contacting portion of the member with the joint provides a welded joint.

Here at least one or more of the reinforcement is preferably formed to extend more than the bottom of the body.

The reinforcing portion is formed with a through hole, and at least one reinforcing wall is formed inside the reinforcing portion to improve strength, and in particular, one side of the reinforcing wall is preferably formed at the side of the frame side.

In addition, the material of the joint is manufactured to be the same as the material of the member to improve the weldability.

Hereinafter, a joint for space frame coupling of a vehicle, which is a preferred embodiment of the present invention, will be described in detail with reference to the accompanying drawings.

Figure 3 is a perspective view showing a portion of the coupling portion of the space frame coupled to the coupling joint according to an embodiment of the present invention, Figure 4 is a perspective view showing the coupling joint, Figure 5 and Figure 6 is a coupling joint It is a top view and a side view showing it.

Space frame 10 of the vehicle is configured by combining a plurality of members in the drawings will be described by taking the vertical member 11 in the vertical direction and the horizontal member 12 in the horizontal direction.

Joint 20 of the present invention is composed of a body 21 and the reinforcing portion 22 formed on the outer surface of the body (21).

The center hole 21a corresponding to the member is formed in the center of the body 21, and the center hole 21a may be formed in various shapes according to the outer circumferential shape of the member. In the present invention, the center hole 21a has a rectangular shape. Is formed.

The body 21 is formed to a certain height, the outer surface of the body 21 is formed with a reinforcement portion 22 having a through hole (22a).

The reinforcement part 22 has at least one reinforcement wall 22b formed therein. The reinforcing wall 22b is formed by the inner surface of the reinforcing portion 22 facing away from the surface of the member side and is formed by adjusting the number and thickness as shown in FIG. 7 to have rigidity according to the use of the vehicle and the member. do.

The reinforcement part 22 of one side of the reinforcement part is longer than the height of the body 21 or the other reinforcement part to be in close contact with the side of the horizontal member 12 and welded.

In this case, the extended reinforcement part 22 has an effect of being extended by cutting the body 21 and the other reinforcement part, and in particular, the cutting of the joint 10 according to the coupling angle of the vertical member 11 and the horizontal member 12. Cut the angle equally.

The above-described joint 10 is formed by extrusion, and the material is also made of the same material as that of the member, thereby improving the weldability between the joint 10 and the member.

Such a joint 10 is inserted into the vertical member 11 and then in close contact with the horizontal member 12, and welds 23 to the contacted portion in a close state. As the welding area is increased, the rigidity is increased as compared with the direct welding of the vertical member 11 and the horizontal member 12.

Moreover, the parts in contact with the body or reinforcement and the member are welded according to the design required to ensure the safety of the vehicle. In other words, any one of the body, the reinforcement, the body and the reinforcement may be selected and welded, which means that the degree of welding or the position of the welding may be changed depending on the design of absorbing the collision energy during the collision of the vehicle.

Meanwhile, as shown in FIG. 8, the upper end of the body 21 may be formed in a curved line to avoid stress concentration due to the shape change of the member after the welding 23 in this portion.

As described above, the preferred embodiments of the present invention substantially solve the conventional problems.

In other words, by inserting and welding a joint formed by extrusion between the vertical member and the horizontal member, the welding area is increased and the rigidity of the space frame is also improved.

And it is made of the same material as the material of the member to improve the weldability, by being manufactured by extrusion can reduce the manufacturing cost.

Claims (6)

In a space frame in which a plurality of members are welded to each other to form a skeleton of an automobile, A body inserted into the member; And It is made of a reinforcing portion formed on the outer surface of the body, Joint of the space frame of the vehicle, characterized in that the contact portion of the body or the reinforcement and the member is welded. The joint of claim 1, wherein at least one of the reinforcement parts is formed to extend further than the bottom surface of the body. The joint for space frame coupling of an automobile according to claim 1 or 2, wherein a through hole is formed in the reinforcement part. The joint of claim 3, wherein at least one reinforcing wall is formed inside the reinforcing part. The space frame joint of claim 4, wherein one side of the reinforcement wall is formed at a surface of the member side. The space frame joint of claim 5, wherein the joint is formed of the same material as that of the member to improve weldability.