JP2000264143A - Shock absorbing bumper structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock absorbing bumper structure capable of absorbing a shock even in a lower part of the bumper. SOLUTION: In this bumper structure, a lower end part 12b of a bumper fascia 12 is attached to a synthetic resin bracket 18, while the bracket 18 is attached to a cross member 20 extending in the vehicle width direction. The front end of the bracket 18 is extended to a vehicle outside end part 12c of the lower end part 12b of the bumper fascia 12, while a rib 18d extending in the vehicle back-and-forth direction formed in the bracket 18 is extended to the front end of the bracket 18. The bracket 18 absorbs a shock to a lower part of the bumper 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a shock absorbing pan bar structure.

[0002]

2. Description of the Related Art Conventionally, as this kind of shock absorbing bumper structure, for example, there is one described in Japanese Utility Model Laid-Open No. 5-3052. In the shock absorbing bumper structure disclosed in this publication, the upper end face terminal portion of the bumper face and the lamp are sandwiched by an elastic clip, and the lower end of the bumper face is attached to the bumper reinforcement by a fastener. And, between the front of the bumper reinforcement and the bumper face,
The shock absorber is arranged.

[0003]

In such a conventional shock absorbing bumper structure, when a shock is received, the shock absorber is deformed to absorb the shock energy. However, it is not designed to actively absorb shocks.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a shock absorbing bumper structure capable of absorbing a shock even at a lower portion of the bumper. .

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a lower end portion of a bumper fascia is attached to a bracket made of synthetic resin.
A shock absorbing bumper structure in which the bracket is further attached to a cross member extending in the vehicle width direction to absorb a shock at a lower portion of the bumper by the bracket, and a tip of the bracket extends to a vehicle outer end at a lower end of the bumper fascia. In addition to the extension, a vertical wall surface provided on the bracket and extending in the vehicle front-rear direction is extended to a tip of the bracket.

According to a second aspect of the present invention, in the first aspect of the present invention, a bent portion that extends toward the inside of the vehicle extends from the outside end of the bumper fascia, The front end of the bracket is bent so as to conform to the outer end portion and the bent portion of the bumper fascia.

[0007] The third aspect of the present invention is the first or second aspect.
In the device described above, an opening for introducing outside air to the inside of the vehicle is provided at a position above a lower end of the bumper fascia, and an upper surface is provided on the bracket over the vertical wall surface, and the upper surface is provided. And a guide plate for guiding outside air from the lower edge of the opening to the lower edge of the heat exchanger located behind the bumper fascia.

The position of the lower end of the vertical wall surface of the bracket may be the same as the height of the lower end of the lower end of the bumper fascia, but the invention according to claim 4 is any one of claims 1 to 3. In the above, the vertical wall surface of the bracket, at a position inside the vehicle at the lower end portion of the bumper fascia, at a position inside the vehicle, below the approach line connecting the lower end of the bumper fascia and the ground contact surface of the tire It is characterized by extending.

[0009] Alternatively, the invention according to claim 5 is based on claim 1.
4. The vertical wall surface of the bracket according to any one of items 3 to 3, wherein the vertical wall surface is installed substantially perpendicular to the vehicle width direction, and the lower end of the bumper fascia is located on the vehicle inner side with respect to the vehicle inner end. , Extending below the lower end of the bumper fascia.

According to a sixth aspect of the present invention, the lower end of the bumper fascia is attached to a bracket made of synthetic resin extending in the vehicle width direction, and the bracket is further attached to a cross member extending in the vehicle width direction, and the bumper is mounted by the bracket. A shock absorbing bumper structure for absorbing a lower shock, wherein the bracket has a closed cross-section structure formed by blow molding, and a front end of the bracket extends to a vehicle outer end at a lower end of a bumper fascia. I do.

According to a seventh aspect of the present invention, in the vehicle according to the sixth aspect, a bent portion which is bent toward the inside of the vehicle extends from the outside end of the bumper fascia, The front end of the bracket has a shape adapted to the outer end and the bent portion of the bumper fascia.

The invention according to claim 8 is the invention according to claim 6 or 7.
In the device described above, an opening for introducing outside air to the inside of the vehicle is provided at a position above a lower end portion of the bumper fascia, and the upper surface of the bracket is located rearward of the bumper fascia from a lower edge of the opening. It is characterized by a wind guide surface that guides outside air to the lower edge of the located heat exchanger.

The position of the lower end of the bracket may be the same as the height of the lower end of the lower end of the bumper fascia, but the invention according to claim 9 is the one according to claims 6 to 8 In the above, the bracket is bulged to a position lower than the approach line connecting the lower end of the bumper fascia and the ground contact surface of the tire at a position on the vehicle inner side of the lower end of the bumper fascia. I do.

According to a tenth aspect of the present invention, the bracket according to any one of the sixth to eighth aspects, wherein the bracket is located at a position on the vehicle interior side of the lower end portion of the bumper fascia. It is characterized in that it bulges below the lower end of the bumper fascia.

[0015]

According to the first aspect of the present invention, the bracket mounted between the bumper fascia and the cross member receives the impact from the bumper fascia, thereby increasing the reaction force at the lower portion of the bumper, and Absorption can be improved. By extending the front end of the bracket to the outer end of the lower end of the bumper fascia, the outer end of the lower end of the bumper fascia can be immediately subjected to impact, that is, a reaction force can be generated from the beginning of the collision. Further, the rigidity and strength of the bracket can be increased by the vertical wall extending to the tip of the bracket.

According to the second aspect of the present invention, in addition to the effect of the first aspect, the front end of the bracket is bent to fit the outer end portion and the bent portion of the bumper fascia, so that the bumper face is bent. The rigidity and strength of the lower end of the shear can be further increased. Further, the lower end of the bumper fascia can be positioned by fitting the outer end of the bumper fascia to the front end of the bracket.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the outside air introduced from the opening of the bumper fascia flows along the upper surface of the bracket serving as the air guide plate. Therefore, the outside air introduced from the bumper fascia can be effectively sent to the heat exchanger.

According to the fourth aspect of the present invention, in addition to the effect of any one of the first to third aspects, by extending the vertical wall surface of the bracket below the approach line, the inclination of the bracket is steeper than the approach line. When the bumper fascia hits the road surface on a rough slope, the bracket can be made to interfere with the road surface to prevent damage to the bumper fascia constituting the outer surface.

According to the fifth aspect of the present invention, in addition to the effect of any one of the first to third aspects, the traveling wind is generated along the vertical wall surface substantially perpendicular to the vehicle width direction. , The wind can be rectified substantially perpendicularly to the vehicle width direction, and the noise generated by the wind below the vehicle body can be reduced.

According to the sixth aspect of the present invention, the bracket attached between the bumper fascia and the cross member receives an impact from the bumper fascia, thereby increasing the reaction force at the lower portion of the bumper, and absorbing the shock. Can be improved. By extending the front end of the bracket to the outer end of the lower end of the bumper fascia, the outer end of the lower end of the bumper fascia can be immediately subjected to impact, that is, a reaction force can be generated from the beginning of the collision. In addition, by forming the bracket with a closed cross-section structure formed by blow molding, the rigidity of the bracket,
Strength can be increased.

According to the seventh aspect of the present invention, in addition to the effect of the sixth aspect, by forming the front end portion of the bracket into a shape adapted to the outer end portion and the bent portion of the bumper fascia, The rigidity and strength of the lower end of the bumper fascia can be further increased. Further, the lower end of the bumper fascia can be positioned by fitting the outer end of the bumper fascia to the front end of the bracket.

According to the eighth aspect of the invention, in addition to the effect of the sixth or seventh aspect, the outside air introduced from the opening of the bumper fascia flows along the upper surface of the bracket serving as the air guide plate. As a result, the outside air introduced from the bumper fascia can be used effectively.

According to the ninth aspect of the present invention, in addition to the effect of any one of the sixth to eighth aspects, the bracket is bulged more than the approach line, so that the bracket is sloping more steeply than the approach line. The bracket can interfere with the road surface before the bumper fascia hits the road surface to prevent the bumper fascia constituting the outer surface from being damaged.

According to the tenth aspect of the present invention, the sixth aspect of the present invention provides
In addition to the effects according to any one of (8) to (8), by expanding the bracket downward, an air dam can be formed to increase the flow velocity of the traveling wind flowing below the vehicle body, thereby improving the anti-lift performance.

[0025]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 are views showing a first embodiment of the shock absorbing bumper structure of the present invention. In the figure,
The shock-absorbing bumper 10 includes a bumper fascia 12 constituting a bumper skin, and a bumper reinforcement 14 extending in the vehicle width direction is disposed inside a middle portion of the bumper 10 in the vertical direction. An energy absorbing material 16 made of polyurethane or polypropylene foam is arranged between the front surface of the bumper reinforcement 14 and the bumper fascia 12.

Lower end 12b of bumper fascia 12
A bent portion 12d which is horizontally bent from the lower end of the outside end portion 12c to the inside of the vehicle extends. This bent part 1
2d, a bracket 18 made of synthetic resin made of, for example, polypropylene or the like, which is extended in the vehicle width direction, is attached. The bracket 18 is further attached to a cross member 20, which is a strength member extending in the vehicle width direction.

The bracket 18 is generally open at the lower side, and has recesses 18a (FIGS. 2 and 3) having an upper side recessed at several places at predetermined intervals. The lower surface of the concave portion 18a overlaps the bent portion 12d, and is connected to the bumper fascia 12 by the bolt and nut 19. An inner side flange 18b bent upward is formed at the rear end of the bracket 18, and the inner side flange 18b is overlapped with the cross member 20 and is connected to the cross member 20 by a bolt nut 21. Have been.

The front end of the bracket 18 extends to the outer end 12c of the bumper fascia 12, and the outer end 12c of the bumper fascia 12 and the bent portion 12c.
The bent portion 18c is bent to fit d.

A plurality of ribs 18d extending in the front-rear direction of the vehicle and constituting a vertical wall surface are integrally provided inside the bracket 18. The plurality of ribs 18d that are substantially perpendicular to the vehicle width direction are arranged at predetermined intervals in the vehicle width direction, and the tip of each rib 18d extends to the vehicle outer end 12c of the bumper fascia 12. Extending.

The lower end 12b of the bumper fascia 12
An opening 12 for introducing outside air to the inside of the vehicle
e is provided, and a second bent portion 12f bent from the upper end of the outer end portion 12c to the inner side of the vehicle is a heat exchanger located rearward of the bumper fascia 12 from the lower end of the opening 12e. The radiator 22 is inclined toward the lower edge. So as to be continuous with the second bent portion 12f,
The upper surface 18e of the bracket 18 straddling the rib 18d is inclined toward the lower edge of the radiator 22, which is a heat exchanger. Thus, the upper surface portion 18e is a wind guide plate, and has a function of guiding outside air introduced from the opening 12e to the radiator 22. Reference numeral 28 denotes a damper, and the inclination of the upper surface 18e in the direction of the radiator 22 ends at the damper 28, but when there is no damper 28, the upper surface 18e extends to the cross member 20. It is good to make the slope of the continuous.

The rib 18d of the bracket 18 is provided at the bent portion 12d of the lower end 12b of the bumper fascia 12.
The lower end of the rib 18d extends downward at a position on the vehicle inside from the inner end of the vehicle.
2 is located below an approach line 26 that connects the lower end of the lower end portion 12b and the front wheel tire 24.

In the shock absorbing bumper structure configured as described above, the reaction force at the lower portion of the bumper 10 can be increased by the bracket 18 receiving the shock input from the bumper fascia 12.

If there is no bracket 18 and the structure is such that the lower end of the bumper fascia 12 is extended and directly attached to the cross member 20, the rigidity and strength of the bumper fascia 12 are not high, so that a large reaction force cannot be obtained. Can not. On the other hand, in the present embodiment, since the rib 18d of the bracket 18 receives the input from the bumper fascia 12 in the shear direction, the rigidity and strength of the bracket 18 are high, and a high reaction force can be generated. Can absorb shock. Bracket 18 and its rib 18d
Of the lower end 12b of the bumper fascia 12 because the front end of the bumper extends to the vehicle outer end 12c.
As soon as c receives the impact, that is, it can produce a reaction force from the beginning of the collision.

The bent portion 18 at the tip of the bracket 18
Since c is adapted to the outer end 12c and the bent portion 12d of the bumper fascia 12, the rigidity and strength of the lower end 12b of the bumper fascia 12 can be increased,
Furthermore, by fitting the outer end 12c of the bumper fascia 12 to the tip of the bracket 18, the lower end 12b of the bumper fascia 12 can be positioned.

Further, the upper surface 18e of the bracket 18
However, since it functions as an air guide plate, the outside air introduced from the opening 12 e of the bumper fascia 12 can be effectively sent to the radiator 22.

Further, the rib 18d of the bracket 18
However, an approach line 26 connecting the lower end of the lower end portion 12b of the bumper fascia 12 and the front wheel tire 24 at a position on the vehicle inner side of the bent portion 12d of the lower end portion 12b of the bumper fascia 12 Also, since it extends downward, on a steep slope that is steeper than the approach line 26, the bracket 18 interferes with the road surface before the bumper fascia 12 hits the road surface,
Damage to the bumper fascia 12 constituting the outer surface can be prevented.

A rib 18d perpendicular to the vehicle width direction is provided.
Extends below the lower end 12b of the bumper fascia 12 at a position on the vehicle interior side of the bent portion 12d of the lower end 12b of the bumper fascia 12, and runs along the rib 18d. Since the wind flows below the vehicle body, the wind can be rectified substantially perpendicularly to the vehicle width direction, and noise generated by the wind below the vehicle body can be reduced.

Next, FIG. 4 and FIG. 5 are views showing a second embodiment of the present invention. In the drawings, the same members as those of the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

The bracket 30 of this embodiment differs from that of the first embodiment in that it has a closed cross-sectional structure in which a resin such as polypropylene is formed by blow molding.

A nut 32 is inserted into the lower surface of the bracket 30, and the nut 32, the lower surface of the bracket 30, and the bent portion 1 of the bumper fascia 12 are inserted.
2d are overlapped, and the bracket 30 and the bumper fascia 12 are connected by the bolt 33. A clip 34 is also inserted at the rear end of the bracket 30, and the clip 34 is locked in a locking hole 20 a provided in the cross member 20, so that
The bracket 30 and the cross member 20 are connected.

The front end of the bracket 30 extends to the outer end 12c of the bumper fascia 12, and the outer end 12c of the bumper fascia 12 and the bent portion 12c.
It has a shape bent to fit d.

The upper surface 30e of the bracket 30 is
The radiator 22 is inclined toward the lower edge of the radiator 22, which is a heat exchanger, so as to be continuous with the second bent portion 12f. In this way, the upper surface portion 30e serves as a baffle plate, and the opening 12e
It has a function of guiding the outside air introduced from the radiator 22 to the radiator 22. When there is no damper 28, the upper surface 3
The inclination of 0e may be continued up to the cross member 20.

The bracket 30 has a bulging portion 30f which bulges below the approach line 26 below the approach line 26 at a position on the vehicle interior side of the bent portion 12d of the lower end portion 12b of the bumper fascia 12. Have.

In the second embodiment configured as described above, the same operation and effect as those of the first embodiment can be obtained, and the bracket 30 receives the shock input from the bumper fascia 12 so that the bracket 30 receives the shock. The reaction force at the lower part of the bumper 10 can be increased. Since the bracket 30 has a closed cross-sectional structure formed by blow molding, the rigidity and strength of the bracket 30 are high, a high reaction force can be generated, and a shock can be absorbed. Further, since the tip of the bracket 30 extends to the vehicle outer end 12c,
Immediately after the impact is applied to the outer end 12c of the lower end 12b of the bumper fascia 12, the reaction force can be generated from the beginning of the collision.

The shape of the tip of the bracket 30 is
The bumper fascia 12 is adapted to fit the outer end 12c and the bent portion 12d of the bumper fascia 12.
The rigidity and strength of the lower end portion 12b of the bumper fascia 12 can be increased. Further, the outer end portion 12c of the bumper fascia 12 is adapted to the front end portion of the bracket 30, so that the lower end portion 12b of the bumper fascia 12 can be positioned. You can do it too.

Further, the upper surface portion 30e of the bracket 30
However, since it functions as an air guide plate, the outside air introduced from the opening 12 e of the bumper fascia 12 can be effectively sent to the radiator 22.

Further, the bulging portion 30f of the bracket 30
However, the bumper fascia 12 is bulged more than the approach line 26 connecting the lower end of the lower end portion 12b of the bumper fascia 12 and the front wheel tire 24. The bulging portion 30f of the bracket 30 interferes with the road surface before hitting the road surface, so that the bumper fascia 12 constituting the outer surface can be prevented from being damaged.

Further, the presence of the bulging portion 30f makes the bulging portion 30f an air dam, thereby increasing the flow velocity of the traveling wind flowing below the vehicle body and improving the anti-lift performance.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a first embodiment of the present invention, and is a cross-sectional view taken along a plane passing through a mounting point of a bracket and a cross member and perpendicular to a vehicle width direction.

FIG. 2 is a diagram illustrating the first embodiment of the present invention, and is a cross-sectional view taken along a plane passing through a mounting point of a bracket and a bumper fascia and perpendicular to a vehicle width direction.

FIG. 3 is a perspective view of a bracket according to the first embodiment.

FIG. 4 is a diagram illustrating a second embodiment of the present invention, and is a cross-sectional view taken along a plane perpendicular to the vehicle width direction.

FIG. 5 is a perspective view of a bracket according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shock absorbing bumper 12 Bumper fascia 12b Lower end part 12c Outer end part 12d Bend part 12e Opening 18 Bracket 18c Bent part 18d Rib (vertical wall surface) 18e Upper surface part 20 Cross member 22 Radiator (heat exchanger) 24 Front wheel tire 26 Approach line 30 Bracket 30e Upper surface 30f Swelling

Claims (10)

[Claims] 1. A shock absorbing bumper structure in which a lower end portion of a bumper fascia is attached to a synthetic resin bracket, and the bracket is further attached to a cross member extending in a vehicle width direction, and the lower portion of the bumper is absorbed by the bracket. Along with extending the tip of the bracket to the outer edge of the lower end of the bumper fascia,
A shock absorbing bumper structure characterized in that a vertical wall surface provided on the bracket and extending in the vehicle front-rear direction extends to a tip of the bracket. 2. A bent portion which is bent toward the inside of the vehicle extends from the outside end of the bumper fascia, and the front end of the bracket is connected to the outside end of the bumper fascia and The shock absorbing bumper structure according to claim 1, wherein the shock absorbing bumper structure is bent so as to conform to the bent portion. 3. An opening for introducing outside air to the inside of the vehicle is provided above the lower end of the bumper fascia, and an upper surface is provided on the bracket over the vertical wall surface. 3. The shock absorbing bumper structure according to claim 1, wherein a baffle plate guides outside air from a lower edge of the opening to a lower edge of the heat exchanger located behind the bumper fascia. 4. The vertical wall surface of the bracket extends below the approach line connecting the lower end of the bumper fascia and the ground contact surface of the tire at a position inside the vehicle at the lower end of the bumper fascia. The shock absorbing bumper structure according to any one of claims 1 to 3, wherein: 5. A vertical wall surface of the bracket is installed substantially perpendicular to a vehicle width direction, and a lower end of the lower end of the bumper fascia is located on the vehicle inner side of the lower end of the bumper fascia. The shock absorbing bumper structure according to claim 1, wherein the shock absorbing bumper structure is extended. 6. A lower end portion of the bumper fascia is attached to a bracket made of synthetic resin extending in the vehicle width direction, and the bracket is further attached to a cross member extending in the vehicle width direction, so that the lower portion of the bumper is absorbed by the bracket. An impact-absorbing bumper structure, wherein the bracket has a closed cross-section structure formed by blow molding, and a front end of the bracket extends to a vehicle-side end at a lower end of a bumper fascia. 7. A bent portion extending toward the inside of the vehicle extends from the outside end of the bumper fascia, and the front end of the bracket is attached to the outside end of the bumper fascia. 7. The shock absorbing bumper structure according to claim 6, wherein the shock absorbing bumper has a shape adapted to the bent portion. 8. An opening for introducing outside air to the inside of the vehicle is provided above the lower end of the bumper fascia, and the upper surface of the bracket is moved from the lower edge of the opening to the rear of the bumper fascia. 8. The shock absorbing bumper structure according to claim 6, wherein a wind guide surface guides outside air to a lower edge of the located heat exchanger. 9. The method according to claim 9, wherein the bracket is bulged below an approach line connecting a lower end of the bumper fascia and a ground contact surface of the tire at a position on the vehicle interior side at a lower end of the bumper fascia. The shock absorbing bumper structure according to any one of claims 6 to 8, wherein: 10. The bracket according to claim 1, wherein the bracket is located at a position on the vehicle interior side of the lower end of the bumper fascia, which is on the vehicle interior side.
9. The shock-absorbing bumper structure according to claim 6, wherein the bumper fascia bulges below a lower end thereof.