KR20000043125A - Impact beam of bumper for vehicle - Google Patents

Abstract

PURPOSE: A structure of an impact beam for a bumper is provided to have the resistant force according to a sectional breakdown and to reduce a producing cost and a weight by improving a sectional structure of the impact beam. CONSTITUTION: An impact beam is equipped with a pair of closed sectional rib portions(102)(104) symmetric in an upper and a lower part. A middle bonding rib portion(106) to connect the closed sectional rib portions(102)(104) in the middle and a upper and a lower bonding rib portions(110)(112) extended in the closed sectional rib portions(102)(104) are contained. The closed sectional rib portions(102)(104) are equipped with a front and a rear walls(101A,101B), and a upper and a lower walls(103A,103B). The upper and the lower walls(103A,103B) have a certain inclination and a radius. Bent flange portions(130A,130B) are contained in the upper and the lower bonding rib portions(110,112).

Description

Impact beam of vehicle bumper

The present invention is to improve the cross-sectional structure of the impact beam in the bumper system installed in the front, rear of the vehicle, the impact of cross-sectional collapse is excellent, the impact of the vehicle bumper focused on making it possible to reduce the manufacturing cost and weight To a beam structure.

In general, a bumper facia for protecting the vehicle body in the event of a vehicle crash, an energy absorber and an impact beam for absorbing impact energy are installed at the front side of the vehicle.

Here, the bumper fascia is made of a resin material (plastics) to protect the vehicle body under a small impact, and is fixed to the vehicle body and the impact beam, respectively.

The impact beam is a rigid body that absorbs the impact energy along with the energy absorber in the front impact and delivers the rest to the front long of the frame.

1 illustrates a cross-sectional configuration diagram of an impact beam 10 as a conventional example, and FIG. 2 illustrates a cross-sectional configuration diagram of the impact beam 20 as another conventional example.

The impact beam 10 of FIG. 1 has a three-piece first beam 12, a second beam 14 bonded to the first beam 12, and the interior of these beams 12, 14. It consists of a reinforcement beam 16 built in the closed section.

Also, the impact beam 20 of FIG. 2 also has a three-piece first beam 22, a second beam 24 bonded to the first beam 22, and the interior of these beams 22, 24. It consists of a reinforcement beam 26 built in the closed section.

As such, the conventional impact beams 10 and 20 have reinforcement beams 16 and 26 embedded therein, respectively, to protect the vehicle body during low-speed collisions while absorbing shocks and reducing deformation during collision of the vehicle.

However, in the case of the impact beam having a three-piece type, the additional reinforcement beams 16 and 26 act as disadvantageous factors that increase the cost and weight as well as the development cost.

Therefore, while omitting the reinforcing beam, while maintaining its rigidity and reducing the amount of deformation of the bumper while satisfying the optimum performance is required to secure the above disadvantages.

The present invention was devised in view of the above circumstances, and provides an impact beam of a vehicle bumper, which focuses on improving the structure of the impact beam and having excellent resistance to cross-sectional collapse and reducing manufacturing cost and weight. Has its purpose.

Specific means of the present invention for achieving the above object,

In the impact beam 100 mounted to the front and rear of the vehicle,

The impact beam 100 includes a pair of closed end ribs 102 and 104 symmetrical in the upper and lower parts;

A center junction rib portion 106 connecting the closed end rib portions 102 and 104 at the center thereof;

It characterized in that it comprises a top, bottom bonding ribs 110, 112 extending to the closed end ribs 102, 104, respectively.

1 is a cross-sectional configuration diagram of an impact beam as a conventional example.

Figure 2 is a cross-sectional configuration of the impact beam in another conventional example.

3 and 4 is a cross-sectional configuration of the impact beam applied to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: impact beam 102,104: closed section rib portion

106: center junction rib portion 110,112: upper and lower junction rib portion

101A, 101B: Front and rear walls 103A, 103B: Top and bottom walls

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

3 is a cross-sectional configuration of an impact beam 100 applied to an embodiment of the present invention.

The impact beam 100 is a pair of closed end ribs symmetrical in the upper and lower portions when the two pieces of the first beam 130 and the second beam 132 each formed by pressing are joined to each other. 102) 104;

A center junction rib portion 106 connecting the closed end rib portions 102 and 104 at the center thereof;

The upper and lower bonding ribs 110 and 112 extend to the closed end ribs 102 and 104, respectively.

The closed end ribs 102 and 104 are provided with front and rear walls 101A and 101B and upper and lower walls 103A and 103B, respectively, with a predetermined inclination θ at each of the upper and lower walls 103A and 103B. Moreover, each edge part 120 and 121 of the closed end rib part 102 and 104 has predetermined radius R. As shown in FIG.

The upper and lower junction rib portions 110 and 112 are provided with flange portions 130A and 130B, the upper and lower ends of the first beam 130 being bent at right angles to the front side.

Meanwhile, in the present embodiment, as shown in FIG. 4, when H = 120mm and L = 90mm, H1 = 35mm, H2 = 20mm, L1 = 50mm, L2 = 15mm, and R = 4mm and θ = 3 °.

The data tested at the prescribed value to satisfy the impact beam 100 of the present embodiment configured as described above at 5 mph is shown in Table 1 below.

As can be seen from the test results according to the change of the thickness of the impact beam, both 1.2 to 1.0 to satisfy. Deformation occurs a lot as the thickness is reduced, but the overall cross-sectional shape is maintained, so it has an elastic deformation aspect.

This is because the cross-section has an ideal structure with closed sections, each up and down, and thus has excellent resistance to cross-sectional collapse. This advantage is more apparent in the case of Pendulum Impact, which is eccentrically impacted.

That is, the impact beam 100 of the present invention is a simple two-piece beam than the conventional three-piece and excellent load resistance ability can obtain two savings of weight and production cost.

As described above, according to the present invention, the cross section structure of the impact beam is improved, and thus resistance to cross section collapse is excellent, and manufacturing cost and weight can be reduced.

Table 1

Deformation relationship between thickness of bumper impact beam

Max.Barrier Intrusion (mm) Max. Beam Deflection (mm) Remarks Beam thickness (mm) 1.4ｔ 1.2ｔ 1.0ｔ 1.4ｔ 1.2ｔ 1.0ｔ Beam weight (kg) 9.108 7.807 6.506 9.108 7.807 6.506 Barrier 59.93 61.90 64.40 Isa 28.23 b 29.52 1 Samuel 35.94 237.06 Upper 43.36 Lower 44.02 ALL O.K. Pendulum center high 60.19 63.76 69.76 1 Samuel 17.82 1 11.25 1 Samuel 15.97 2 7.78 16.22Bottom 7.57 ALL O.K.

Claims (3)

In the impact beam 100 mounted to the front and rear of the vehicle, The impact beam 100 includes a pair of closed cross-section ribs 102 and 104 symmetrical in the upper and lower parts; A center junction rib portion 106 connecting the closed end rib portions 102 and 104 at the center thereof; Impact beam of the vehicle bumper, characterized in that it comprises an upper and lower bonding ribs (110, 112) extending to the closed end ribs (102, 104), respectively. According to claim 1, The closed end rib portion 102 (104) is provided with the front and rear walls (101A, 101B) and the upper and lower walls (103A, 103B), each of the upper and lower walls (103A, 103B) The impact beam of the bumper of the vehicle, characterized in that it has a slope θ and a radius R of. The impact beam of the vehicle bumper according to claim 1, wherein the upper and lower joining rib parts (110, 112) include bent flange parts (130A, 130B).