KR20030016006A - Bumper mounting apparatus of automobile - Google Patents

Abstract

PURPOSE: An installation apparatus for a bumper of a vehicle is provided to protect a pedestrian safely by minimizing projection of the bumper after absorbing impact with absorbing impact energy and restricting deformation of a side frame. CONSTITUTION: A bumper mounting device of a vehicle is composed of bumper stays(5,5') fixed in both ends of a back beam(2); first and second buffer chambers(12,13) formed in the end of a side member and penetrated to slide bumper stays; first springs(14,14') wound on the bumper stays of the first buffer chamber; a second buffer unit(15) installed in the second buffer chamber to absorb impact opposite to the first spring; and levers(19,19') supported in the second buffer chamber by a pin and contacted to the ends of the bumper stays and the second buffer unit. Impact is absorbed efficiently with offsetting shock by compressing the second spring opposite to the first spring, and safety is improved with preventing deformation.

Description

Bumper Mounting Device for Cars {BUMPER MOUNTING APPARATUS OF AUTOMOBILE}

The present invention relates to a bumper mounting apparatus of a motor vehicle, and more particularly, to a collision energy absorbing apparatus of a bumper.

As is well known, bumpers for automobiles are provided with a bumper cover on the outside of the back beam or an energy absorber disposed between the back beam and the bumper cover, and fixing bumper stays at both ends of the back beam to secure bolts and the like to both side members. When the collision energy is small, the back beam or the energy absorber and the back beam absorb the collision energy, but when the collision energy is large, the side member deforms and the bumper penetrates into the interior, so that the hood panel, the head lamp, etc. It is damaged and the injury value of the occupant is increased.

Applicant of the present invention has proposed a bumper mounting structure of the United States Patent No. 6,050,624 to correct the above problems, the bumper mounting structure is shown at both ends of the back beam 31 of the bumper 30 as shown in FIG. A fixed bumper stay 32 and a side member 40 formed integrally with the body and formed into a quadrilateral hollow in the cross section, into which the bumper stay 32 is inserted, wherein the bumper stay 32 has an upper surface and Slots 33 are formed on the side surfaces to guide the guide pins 41 fixed to the side members 40 so that the bumper stays 32 can be slid backwards in the event of a collision. The second springs 42 and 42 'are formed on both sides of the front end position of the bumper stay 32 in the state where the collision energy is not applied to the bumper 30 to embed the first springs 43 and 43'. And the first springs 43 and 43 'inside the side member 40. The triangular shaped cushioning members 44 and 44 ′ supported by the protrusion are hinged to restrain the tip of the bumper stay 32 at the time of non-collision, and the buffer members 44 and 44 of the side member 40. The stopper plate 45 is fixed to the rear of the ") to form a first operating chamber 46 between the stopper plate 45 and the shock absorbing member 44, 44 '. The second spring 47 is built in.

Reference numeral 34 is an energy absorber, and 35 is a bumper cover.

In the bumper mounting structure, when the bumper is not collided, the bumper stay 32 maintains its front end constrained to the buffer members 44 and 44 'as shown in FIG. When the impact energy within the elastic limit of the 34 and the back beam 31 is applied, the energy absorber 34 and the back beam 31 absorb the collision energy, and the energy absorber 34 or the like exceeds the elastic limit. When the impingement energy is applied, the bumper stay 32 is guided backward along the guide pin 41 and the bumper stay 32 is further inserted into the side member 40 and the front end thereof is a buffer member ( The first springs 43 and 43 'are compressed when the 44 and 44' are placed in the second operating chamber 42 and 42 'side, absorbing the collision energy primarily by their elasticity, and continuing with the bumper. As the tip of the stay 32 is pushed backward, the second spring 47 embedded in the first operating chamber 46 is compressed. By the elasticity it is to absorb the secondary energy by secondary.

However, in the above bumper mounting structure, when a large impact energy is applied to the bumper 30, the bumper stay 32 is inserted into the side member 40 side by the length of the slot 33, so that the bumper 30 has a large amount of sliding. , The head lamp or the like is severely damaged, and the shock absorbing members 33 and 33 ′ are stored in the second operating chamber 42 and 42 ′ when the impact energy of the bumper 30 is applied to the bumper 30. As the 32 is pushed, the collision energy absorption function of the energy absorber 34 and the back beam 31 is not used, but rather a rigid body, and the side frame when a large collision energy is applied to the second spring 47. It is transmitted to the back and its deformation is large, and the injury value of the occupant is increased.

In addition, when the second spring 47 absorbs the collision energy and returns to its original position, which is in a non-collision state by the elastic restoring force, the pedestrian's safety is weakened.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bumper mounting apparatus for an automobile in which the above-mentioned problems are corrected, so that collision energy absorption is improved and the deformation of the side frame is reduced.

Another object of the present invention is to provide a bumper mounting apparatus for a vehicle capable of improving the safety of pedestrians by minimizing the amount of protrusion of bumpers after collision energy absorption.

In order to achieve the above object, the present invention includes a bumper stay fixed to both ends of the back beam; First and second buffer chambers formed at a front end of the side member and penetrated to allow the bumper stay to slide; A first spring wound around the bumper stay of the first buffer chamber; A second buffer means installed in the second buffer chamber so as to absorb collision energy in a direction opposite to the first spring, and a lever supported by a pin to contact the end portion of the bumper stay and the second buffer means in the second buffer chamber; It is composed of.

1 is a cross-sectional view of an embodiment of the present invention.

2 is an enlarged sectional view showing main parts of an embodiment of the present invention;

3 is a cross-sectional view of a conventional one.

<Description of Signs of Major Parts of Drawings>

2: back beam 5, 5 ': bumper stay 9: side member

12, 13: 1st and 2nd buffer room 14, 14 ': 1st spring

15: second buffer means 9, 19 ': lever

1 is a cross-sectional view of an embodiment of the invention, where 1 is a bumper and the bumper 1 is arranged with an energy absorber 4 between the back beam 2 and the bumper cover 3.

5 and 5 'are bumper stays, and the bumper stays 5 and 5' are fixed to brackets 6 at both ends of the back beam 2, and the spring bearing 7 is positioned near the bumper 1. The support jaws 8 and 8 'supported on the second buffer chamber 13 side of the support plate 11 to be provided later at the same time as the 7' is provided are formed.

9 is a side member, the side member (9) is closed by the cap 10, the front end of the support plate 11 is divided by installing the support plate 11 at a predetermined interval with the cap 10 The first and second buffer chambers 12 and 13 are formed to penetrate the bumper stays 5 and 5 'so as to slide therethrough, and at the same time, the bumper stays 5 of the first buffer chamber 12 ( 5 ') is wound around the first spring 14, 14' which is compressed to the indoor side, and one end is supported by the support plate 11 at the other end of the spring bearings 7 and 7 '.

15 is a second shock absorbing means, the second shock absorbing means 15 fixes the support bar 16 to the support plate 11 so as to wind the second spring 17 and slide the operating plate 18 simultaneously. Both ends of the second spring 17 are installed and fixed to the support plate 11 and the operation plate 18.

19 and 19 'are levers, and the levers 19 and 19' are supported by the pins 20 in the second buffer chamber 13 of the side member 9, and both ends thereof are bumper stays 5 and 5 '. The end of the c) and the operating plate 16 are in contact with or close to each other.

In addition, the present invention is to provide a stopper (21) (21 ') at a predetermined interval (d) behind the lever (19) 19' of the side member (9).

In the present invention as described above, when the collision energy is applied to the bumper 1, the collision energy is absorbed by the energy absorber 4 and the back beam 2 of the bumper 1, and at the same time the bumper stays 5 and 5 '. Is pushed to the interior side and at the same time the first spring 14, 14 'in the first buffer chamber 12 is compressed and collision energy is absorbed again (the spring constant of the first spring 14, 14' is changed to the bumper ( If it is greater than the breaking strength of 1), the energy absorber 4 and the back beam 2 of the bumper 1 absorb the collision energy until the bumper 1 is destroyed, and then the first spring 14 ( 14 ') absorbs the collision energy while the bumper stays 5, 5' end of the bumper stays 5, 5 'in the direction of the arrow at an angle equal to a certain distance d as shown in FIG. By rotating, the other end of the levers 19 and 19'means the operation plate 18 of the second shock absorbing means 15 to the outside, while the second spring 17 is connected to the first spring 14 and 14 '. In the opposite direction That is, the collision energy absorption is good because the collision energy is canceled by absorbing the collision energy while being compressed to the outdoor side.

When the collision energy is canceled when absorbing the collision energy in three times as described above, the amount transmitted to the body such as the side member is reduced, so that the deformation of the body such as the side member is small and the safety of the occupant is increased. In addition, stoppers 21 and 21 'are installed at the rear of the levers 19 and 19' to control the rotation of the levers 19 and 19 '. ), The amount of sliding of the bumper 1 is small, so that damage to the hood panel, the head lamp, and the like is reduced.

The support jaw 8 formed in the bumper stays 5 and 5 'when the bumper 1 returns to its original position by the elastic restoring force of the first springs 14 and 14' after the collision energy is absorbed. 8 ') is supported by the support plate 11 to minimize the protrusion of the bumper 1 to increase the safety of pedestrians.

As described above, the present invention absorbs collision energy over three orders, and in particular, the second spring absorbing the third collision energy is compressed in a direction opposite to the collision energy absorption direction of the first spring to cancel the collision energy. Absorption is good, so repair cost can be reduced, and the collision energy transmitted to the body is small, so that the deformation of the body is small and the occupant's safety is increased.

In addition, the safety of the pedestrian can be increased by minimizing the amount of protrusion of the bumper when the bumper returns to its original position.

Claims (4)

Bumper stays fixed to both ends of the back beam; First and second buffer chambers formed at a front end of the side member and penetrated to allow the bumper stay to slide; A first spring wound around the bumper stay of the first buffer chamber; A second buffer means installed in the second buffer chamber so as to absorb collision energy in a direction opposite to the first spring, and a lever supported by a pin to contact the end portion of the bumper stay and the second buffer means in the second buffer chamber; Bumper mounting device for cars. 2. The bumper mounting apparatus of claim 1, wherein the second shock absorbing means is installed to secure the support rod to the support plate to wind the second spring and to slide the operation plate, thereby fixing both ends of the second spring to the support plate and the operation plate. . 2. The bumper mounting apparatus for a vehicle according to claim 1, wherein a stopper is provided at a predetermined interval behind the lever of the side member. 2. The bumper mounting apparatus of claim 1, wherein a support jaw is formed in the bumper stay to support the support plate when the bumper returns to its original position.