KR100716774B1 - Bumper for vehicle - Google Patents

Abstract

The present invention includes a first tube filled with a fluid therein, a second tube filled with a fluid inside the first tube and a connecting tube connecting the first and second tubes to communicate with each other; And a valve provided between the first tube and the second tube to open when the pressure in the first tube increases above a predetermined pressure to allow fluid therein to move to the second tube. It provides a bumper for vehicles that can protect pedestrians, occupants and the body by improving the shock absorbing and absorbing performance of the body.

Bumpers, tubes, buffers, valves

Description

Bumper for vehicle

1 is an exploded perspective view of a vehicle bumper according to the prior art.

2 is a perspective view showing an appearance of a vehicle bumper according to the present invention;

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a schematic view of a vehicle bumper according to the present invention;

5 is a partially enlarged view of FIG. 4.

6a to 6c is a view illustrating a shock absorbing process of the vehicle bumper according to the present invention.

* Description of the symbols for the main parts of the drawings *

100 bumper cover 200 back beam

300: shock absorber 400: cushioning means

410: first tube 412: outlet

420: second tube 422: inlet

430 connector 440 valve

The present invention relates to a vehicle bumper, and more particularly to a vehicle bumper that can protect pedestrians, occupants and the body by improving the shock absorbing and absorbing performance of the vehicle body in the event of a vehicle crash.

In general, a bumper for a vehicle is a structure provided to protect a vehicle body by absorbing an external shock due to a collision or the like, provided before and after the vehicle.

Conventionally, a steel bumper is mounted and used to protrude slightly from the vehicle body, but a bumper capable of absorbing impact energy is generally used since a large bumper is used in the United States. In recent years, bumpers equipped with back beams that perform rigidity and shock absorption functions have been widely used. That is, a bumper mounted on a vehicle produced these days includes a bumper cover and a back beam, a shock absorber is built in between the bumper cover and the back beam, and the bumper cover is fixed to the back beam by a retainer. At this time, the air inlet is formed in the lower part of the bumper cover so that the outside air is circulated to the inside of the engine room, and a rib for maintaining rigidity is formed in the back beam.

1 is an exploded perspective view of a bumper for a vehicle according to the prior art.

As shown in FIG. 1, a vehicle bumper according to the prior art is provided with a back beam 2 formed in front of the frame 1, and a heat-sealing, adhesive or other fastening means in front of the back beam 2. It is detachably mounted by a bumper cover (3) formed of a synthetic resin material such as urethane, and the shock absorber (4) interposed between the back beam (2) and the bumper cover (3) to absorb and mitigate the shock applied to the vehicle body (4) ).

However, the bumper for a vehicle according to the prior art as described above has a disadvantage in that it does not sufficiently disperse or absorb the impact energy received from the outside because it only absorbs the primary shock during a vehicle collision.

Accordingly, an object of the present invention is to provide a bumper for a vehicle that can protect pedestrians, occupants and the body by improving the shock absorbing and absorbing performance of the vehicle body when the vehicle collides.

According to an aspect of the present invention, there is provided a vehicle bumper including: a first tube filled with a fluid therein; a second tube filled with a fluid; and disposed behind the first tube; A connecting tube connecting the two tubes so as to communicate with each other, and provided between the first tube and the second tube so that when the pressure in the first tube increases above a certain pressure, the fluid therein moves to the second tube. It is configured to include a valve that allows.

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

FIG. 2 is a perspective view showing an appearance of a vehicle bumper according to the present invention, and FIG. 3 is a cross-sectional view taken along line A-A of FIG.

As shown in Figures 2 and 3, the vehicle bumper of the present invention, the bumper cover 100, the back beam 200 is coupled to the front frame of the vehicle, the bumper cover 100 and the back beam 200 It is composed of a shock absorber 300 provided in between, and the buffer means 400 provided before and after the shock absorber 300.

The bumper cover 100 is protruded at the tip of the vehicle to protect the vehicle body and is made of a synthetic resin material having elasticity such as urethane so as to absorb a certain amount of impact generated during a collision of the vehicle.

The back beam 200 is coupled to the bumper cover 100 to fix the bumper cover 100 to the vehicle body. The back beam 200 is made of metal so that the bumper for a vehicle has a certain rigidity.

The shock absorber 300 is to protect the vehicle body by absorbing the shock generated during the collision of the vehicle is made of urethane foam, it is generally provided between the bumper cover 100 and the back beam 200.

The shock absorbing means 400 is provided before and after the shock absorber 300 to protect pedestrians collided with the vehicle when the vehicle collides. The shock absorber 400 is configured to reduce the impact applied to the pedestrian during the collision.

4 is a schematic view of a vehicle bumper according to the present invention, and FIG. 5 is a partially enlarged view of FIG. 4, and the buffer means 400 will be described in more detail with reference to the accompanying drawings.

The shock absorbing means 400 includes a first tube 410 filled with a fluid therein, a second tube 420 filled with a fluid and disposed behind the first tube 410, and the first and A connecting tube 430 connecting the second tubes 410 and 420 so as to communicate with each other, and provided between the first tube 410 and the second tube 420 to control the fluid to move in only one direction. It consists of a valve 440.

The first tube 410 is provided in front of the shock absorber 300, that is, between the bumper cover (100 in FIG. 3) and the shock absorber 300, and extends in the longitudinal direction of the shock absorber 300. In addition, the first tube 410 is provided with a predetermined space so that the fluid can be filled therein as described above. Therefore, when the fluid is injected into the inside of the first tube 410 is expanded and the volume is increased.

The second tube 420 is provided behind the shock absorber 300, that is, between the shock absorber 300 and the back beam 200 (FIG. 3) and extends in the longitudinal direction of the shock absorber 300. In addition, similar to the first tube 410, the second tube 420 is provided with a predetermined space so that the fluid can be filled therein, and when the fluid is injected, the second tube 420 expands and becomes bulky. At this time, the second tube 420 is filled with only a part of the inner space of the fluid. This is to receive and move the fluid from the first tube 410 when the collision of the vehicle to buffer and absorb the impact force will be described in detail later.

The connection pipe 430 is provided between the first and second tubes 410 and 420 to connect the respective tubes 410 and 420 to communicate with each other. That is, the fluid may move between the first and second tubes 410 and 420. In this case, the connection pipe 430 is preferably provided in plurality so that the fluid that moves between the first and second tubes (410, 420) can be moved smoothly.

Looking at the coupling structure of the first and second tube (410, 420) and the connection pipe 430, the first and second tube (410, 420) outlet 412 is provided in the same number as the connection pipe (430) ) And an inlet 422 are provided. In addition, the connection pipe 430 is a hollow tube having a predetermined length and is located through the shock absorber 300, both ends thereof are coupled to the outlet 412 and the inlet 422, respectively. At this time, the combination of the outlet 412 and the inlet 422 and the connection pipe 430 is sealed to ensure that the fluid moving inside the leak does not leak to the outside.

Here, the outlet 412 is provided in the first tube 410 and the inlet 422 is provided in the second tube 420, respectively, and the outlet 412 and the inlet 422 are formed in the same diameter and shape. It is desirable to be.

The valve 440 is provided between the first and second tubes 410 and 420 such that the fluid inside the first and second tubes 410 and 420 moves only in one direction. That is, when the pressure of any one of the first and second tubes 410 and 420 is increased above the set pressure of the valve 440, the fluid is opened to move.

In the case of the present invention, the bumper cover 100 first presses the first tube 410 located between the bumper cover 100 and the shock absorber 300 by the impact generated when the vehicle collides with the first tube 410. The pressure of the pressure is increased, and only a portion of the pressure-increased first tube 410 is moved to the filled second tube 420. Accordingly, the valve 440 is opened to move the fluid from the first tube 410 to the second tube 420, but closes the fluid in the opposite direction.

The valve 440 is a stopper 442 provided on the fluid movement passage between the first and second tubes 410 and 420, and the stopper 442 is a direction for closing the fluid movement passage. With elastic bias. That is, the stopper 442 is elastically biased toward the first tube 410 side when the pressure of the first tube 410 rises above the elastic force of the stopper 442 to rotate to the second tube 420 side fluid movement Open the passage. In this case, the stopper 442 is integrally provided at the inlet 422 of the second tube 420 into which the fluid is introduced, and is provided at each inlet 422 of the second tube 420.

Meanwhile, any fluid may be used as the fluid filled in the first and second tubes 410 and 420. However, using general air may be easily obtained and economically advantageous.

6A to 6C are views illustrating a shock absorbing process of the vehicle bumper according to the present invention.

FIG. 6A illustrates a state in which a vehicle bumper is mounted on a vehicle, and as shown in the drawing, a back beam 200 is positioned in front of a front frame of the vehicle, and a front of the back beam 200 is shown in FIG. The bumper cover 100 is located in the. The shock absorber 300 is provided between the back beam 200 and the bumper cover 100, and the first tube 410 and the second tube 420 are positioned before and after the shock absorber 300. In addition, the connection pipe 430 is provided between the outlet 412 of the first tube 410 and the inlet 422 of the second tube 420, the connection pipe 430 is the shock absorber 430 It is provided inside. In this case, the fluid is buffered in the first tube 410, and only about half of the volume of the second tube 420 is filled in the second tube 420.

When the collision with the pedestrian occurs while the vehicle is traveling in the arrow direction of FIG. 6B as described above, the bumper cover 100 is pushed to the rear of the vehicle. The bumper cover 100 pushed to the rear of the vehicle pressurizes the first tube 410 provided between the bumper cover 100 and the shock absorber 300 to increase the pressure therein. When the pressure of the first tube 410 rises above the set pressure of the valve 440, the valve 440 is opened so that the fluid in the first tube 410 moves toward the second tube 420. . At this time, the volume and pressure of the first tube 410 is reduced, the volume and pressure of the second tube 420 is increased.

Therefore, the impact generated during the vehicle collision is transmitted to the first tube 410 through the bumper cover 100 to pressurize the first tube 410, and when the pressure is raised above the set pressure of the valve 440, the valve ( 440 is opened to move the fluid inside the first tube 410 to the second tube 420 to cushion and absorb the impact.

FIG. 6C is a view illustrating a state in which the first tube 410 is completely reduced by the impact generated during a vehicle collision and the second tube 420 is fully expanded.

As described above, the configuration and operation of the bumper for a vehicle according to a preferred embodiment of the present invention has been shown in accordance with the above description and drawings, but this is merely described for example and various within the scope without departing from the spirit of the present invention. It will be understood by those skilled in the art that variations and modifications are possible.

As described above, the vehicle bumper of the present invention is provided with a tube filled with a fluid inside the bumper, and thus has excellent shock absorbing and absorbing performance against the impact force received by the vehicle body during a vehicle collision.

In addition, by providing a plurality of the tube to be able to move the fluid therein can further improve the shock absorbing and absorbing performance and is very effective in protecting pedestrians, occupants and the body.

Claims (6)

delete A first tube filled with fluid therein; A second tube filled with a fluid and disposed behind the first tube; A connecting tube connecting the first and second tubes to communicate with each other; A valve provided between the first tube and the second tube to open when the pressure in the first tube increases above a predetermined pressure to allow fluid therein to move to the second tube; It is configured to include, wherein the valve comprises a stopper provided to be rotatable in the connecting pipe, the stopper is a vehicle bumper characterized in that the elastic bias in the direction of closing the connecting pipe. The method according to claim 2, The second tube is provided with an inlet coupled to the connection pipe, the valve is a vehicle bumper, characterized in that formed integrally with the inlet. The method according to claim 2 or 3, A bumper for a vehicle, characterized in that a shock absorber is provided between the first and second tubes. The method according to claim 2 or 3, Bumper for the vehicle, characterized in that the connector is provided in plurality The method according to claim 2 or 3, Bumper for the vehicle, characterized in that the fluid comprises air.

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