KR200181749Y1 - Impact absorbing system of bumper - Google Patents

Abstract

The present invention relates to a shock absorber of a vehicle bumper, and the present invention relates to a bumper structure comprising a vehicle body in front and rear of the vehicle, a bumper cover coupled to the vehicle body, and a shock absorbing pad provided between the vehicle body and the bumper cover. Between the pad 2 and the vehicle body 4, the impact force of the shock absorbing pad 2 at the time of a vehicle collision is absorbed by the fluid pressure in the cylinder case 6 provided in the vehicle body 4, and the bumper is utilized by the reaction force by the fluid. A shock absorbing cylinder (3) is provided to absorb the damage of the cover (1) and the shock transmitted to the inside of the vehicle. It is designed to protect safely and to prevent damage to the body by restoring the bumper to its initial state.

Description

Shock absorber of vehicle bumper

The present invention relates to a shock absorber of a vehicle bumper, and more particularly, to reduce the impact force transmitted to the vehicle body in the event of a collision to protect the driver and passengers, and to prevent vehicle damage. Absorption Device of car).

A general bumper is a device installed to protect a vehicle body in front and rear of a vehicle, and is configured to absorb the impact when the vehicle crashes. Conventional bumpers have a structure in which a shock absorber is interposed between a steel beam and a cover, and a foamable material such as urethane is used as the shock absorber.

Recently, a back beam that performs both functions of rigid maintenance and shock absorption in place of a bumper having a complicated structure is widely used. The back beam of the strength reinforcing bumper is a blow molding (a type of plastic molding, in which a sheet-shaped molded article or a tubular molded article joined together and a tubular molded article are put in a mold and blown with air to form a hollow article). Is manufactured by. By the blow molding, a tack-off portion is formed in the back beam, and several lobes are provided in the back beam by the tack-off portion.

However, the above-mentioned strength reinforcing bumper has a problem in that a manufacturing cost and a work process are added by using several lobes over the front surface of the bumper inner wall, and the lobe easily absorbed the bumper shock in a vehicle crash is easily broken. There was a problem that can not eliminate the function of the bumper.

Therefore, the present invention was devised to solve the above problems, and it is possible to reinforce the shock without adding a separate cushioning material and a rigid material to the bumper, and to preserve the original shape of the bumper by impact absorption and repulsion of the bumper during a vehicle crash. Therefore, the object of the present invention is to provide a shock absorber of a vehicle bumper that can safely protect a driver and a passenger and prevent damage to a vehicle exterior.

1 is a perspective view showing a bumper according to the present invention,

FIG. 2 is a sectional view taken along the line “B-B” of FIG. 1.

<Description of the code | symbol about the principal part of drawing>

DESCRIPTION OF SYMBOLS 1: Bumper cover 2: Shock absorbing pad 3: Shock absorbing cylinder 4: Body 5: Soft plate 6: Cylinder case 7: Rebound piston 8: First piston rod 9: Second piston rod 10: Compression spring 11, 12: Return spring 13, 14: bulkhead 15, 16, 17: fluid chamber 18, 19: vertical bulkhead 20, 20 ': rupture plate

In order to achieve the above object, the present invention provides a bumper structure including a vehicle body in front and rear of a vehicle, a bumper cover coupled to the vehicle body, and a buffer pad provided between the vehicle body and the bumper cover, wherein the buffer pad is located between the vehicle body and the vehicle body. And a shock absorbing cylinder configured to absorb the impact force of the shock absorber pad at the fluid pressure in the case provided in the vehicle body and to absorb the damage of the bumper cover and the shock transmitted to the inside of the vehicle by using the reaction force caused by the fluid. It features.

Hereinafter, a shock absorber of a vehicle bumper according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the application area of the bumper according to the present invention, Figure 2 is a cross-sectional view showing the state of use of the bumper according to the present invention.

The shock absorber of the vehicle bumper according to the present invention includes a bumper cover 1, a shock absorbing pad 2, a shock absorbing cylinder 3, and a vehicle body 4.

The bumper cover 1 is installed in the vehicle body 4 before and after the vehicle, and the shock absorbing pad 2 is provided inside the bumper cover 1, and the soft plate 5 is provided on one surface of the shock absorbing pad 2. Is supported, and a shock absorbing cylinder (3) is provided between the soft plate (5) of the buffer pad (2) and the vehicle body (4).

The shock absorbing cylinder (3) includes a cylinder case (6), a rebound piston (7), shock absorbing first and second piston rods (8) and (9), a compression spring (10) and a return spring (11). It comprises 12.

In the cylinder case 6, one surface is fixed to the vehicle body 4, the other surface forms an open portion, and two partition walls 13 and 14 are formed inside the three fluid chambers in the vertical direction. (15) (16) (17), but vertical bulkheads (18) and (19) are installed in the upper and lower fluid chambers (15) and (17) except for the central fluid chamber (16) to store separate fluids. do. This is for the central fluid chamber 16 to form a "ㅓ" shaped fluid chamber in the cylinder case 6. In addition, the vertical partition walls 18 and 19 of the upper and lower fluid chambers 15 and 17 are ruptured by forming a bursting plate 20 and 20 'integrally at a central portion, respectively, to rupture and pass when a large pressure is operated in the fluid chamber. It was made possible. Repulsion pistons 7 and shock absorbing first and second piston rods 8 and 9 are inserted into the fluid chambers 15, 16 and 17, respectively. One piston rod 8 inserts a second piston rod 9 into the lower fluid chamber 17 and a repelling piston 7 with pistons on both sides of the rod into the central fluid chamber 16. In addition, return springs 11 and 12 are respectively supported between the first and second piston rods 8 and 9 and the vertical bulkheads 18 and 19, and the rebound piston 7 and the shock absorbing pad 2 are respectively supported. The compression spring 10 is supported between the soft plates 5 of the c), and a working fluid is stored in the fluid chamber in the cylinder case 6.

Hereinafter, with reference to the accompanying drawings, the operating state according to the present invention will be described in detail.

As shown in FIG. 2, when the vehicle collides with the pour in front of the vehicle, first, the bumper cover 1 is bent to transmit the shock to the shock absorbing pad 2, and the shock absorbing pad 2 receives the shock force to some extent. Will absorb. When a continuous impact force is applied to the bumper, the soft plate 5 of the shock absorbing pad 2 pushes the first and second piston rods 8 and 9 provided on the upper and lower sides in the cylinder case 6, and at the same time The first and second piston rods 8 and 9 compress the working fluid stored therein while compressing the return springs 11 and 12, respectively. At this time, the working fluid is passed through the central fluid chamber 16 while cutting the rupture plates 20 and 20 'of the vertical bulkheads 18 and 19 without passing a large pressure. (7) is pushed, and the rebound piston (7) continuously pushes the shock absorbing pad (2) to the initial state while compressing the compression spring (10) to transfer the shock of the bumper to the vehicle body (4) again to the outside It is to let.

Therefore, the shock absorber of the vehicle bumper according to the present invention, by the shock absorbing cylinder built between the bumper cover and the vehicle body when the vehicle crash to absorb the shock and transmit the impact force to the outside life of the driver and passenger in the cabin Can be safely protected, and also has the effect of restoring the bumper to the initial state to prevent body damage.

Although the present invention has been illustrated and described with reference to certain preferred embodiments, the present invention may be modified and modified in various ways without departing from the spirit or the field of the present invention provided by the following Utility Model Registration Claims. It can be easily understood by those skilled in the art.

Claims (2)

In the bumper structure consisting of a vehicle body in front and rear of the vehicle, a bumper cover coupled to the vehicle body, and a buffer pad provided between the vehicle body and the bumper cover, Between the shock absorbing pad and the vehicle body, the impact force of the shock absorbing pad is absorbed by the fluid pressure in the case provided in the vehicle body during vehicle collision, and the damage of the bumper cover and the shock transmitted to the inside of the vehicle are absorbed by the reaction force by the fluid. A shock absorbing device for a vehicle bumper, comprising a shock absorbing cylinder. The shock absorbing cylinder is provided between the shock absorbing pad (2) and the vehicle body (4), and two partitions (13) and (14) are formed inside the three fluid chambers in the vertical direction. 15) (16) (17), wherein the central fluid chamber (16) is in the shape of " ㅓ ", and the upper and lower fluid chambers (15,17) have a vertical bulkhead (18) to store a separate fluid. Cylinder case (19) is installed; First and second piston rods (8) (9) provided in the upper and lower fluid chambers (15) and (17) to absorb bumper shocks and to compress working fluids; A rupture plate (20) (20 ') formed in the vertical bulkhead (18) (19) and broken when the pressure of the working fluid rises to pass the working fluid to the central fluid chamber (16); Return springs (11) (12) for returning the first and second piston rods (8) (9) moved in the upper and lower fluid chambers (15) and (17) in the cylinder case (6), respectively; A rebound piston (7) which is provided in the central fluid chamber (16) to push the buffer pad (2) with a holding force of the compression spring (10) with a working fluid pressure that is repelled; Bumper shock absorber of the vehicle, characterized in that comprises a.