CN101573256B

CN101573256B - Bottom-support beam for a vehicle bumper having horizontal and vertical walls

Info

Publication number: CN101573256B
Application number: CN2007800277686A
Authority: CN
Inventors: M-P·托伊甘斯; L·德尔马斯; N·莫林
Original assignee: Plastic Omnium SE
Current assignee: Plastic Omnium SE
Priority date: 2006-05-24
Filing date: 2007-05-24
Publication date: 2011-05-18
Anticipated expiration: 2027-05-24
Also published as: FR2901521A1; CN101573256A; AR062817A1; WO2007135346A3; FR2901521B1; WO2007135346A2

Abstract

The beam (2, 40, 50), in particular a bottom-support beam, for a vehicle bumper comprises at least two horizontal walls (20, 22), and at least two vertical walls (6, 8, 10, 12, 46, 48) extending transversally to the direction of travel (X) of the vehicle.

Description

The lower support beam that is used for vehicle bumper with horizontal wall and vertical wall

The present invention relates to the front bumper of power actuated vehicle, more specifically, relate to the reinforcement of the lower area of bumper/spoiler, in order to satisfy about with the biomechanics standard of pedestrian's collision.

Also therefore minimizing is to pedestrian's injury with vehicle collision the time in order to satisfy these biomechanics standards, and the bottom of bumper/spoiler must be enough hard.At present, the trend of contour of the vehicle is the outer outstanding amount that reduces vehicle.Therefore, the lower support thing of bumper/spoiler is just becoming more and more harder.

In order to improve this rigidity, on the known bottom section that metal tube is fixed to vehicle.Yet metallo-uses and has added extra weight.

The reason that beam type that Here it is is made by plastic material or streamlined reefer housing (car é nage) formula upholder occur.The streamlined reefer housing scheme need have attachment point on vehicle body, front portion or other elements of vehicle, consider the vehicle structure difference, and this scheme is always not attainable.Document DE-102004007571 discloses the plastic material beam that is used to provide rigidity in Fig. 2 to 4.Yet problem is exactly promptly at the center of beam, to realize required firmness level at Y0.In fact, at this structural beam upholder away from this Central Collisions district.In addition, for true(-)running under the situation of pedestrian impact is taking place, usually must be in the time of certain-length or in certain stroke range the level of confining force, and this beam for this document is difficult.

The objective of the invention is to propose a kind of structure of lower support beam, this structure makes the hardness of this lower support beam can increase and make this hardness being kept in the time at certain-length during the pedestrian impact.

For this reason, the invention provides a kind of vehicle bumper beam, especially a kind of lower support beam, this beam comprise at least two horizontal wall and at least two vertical walls, and described vertical wall extends transverse to the travel direction of vehicle.

Therefore, when under the situation about bumping during to the leg application of force, these walls provide stability for these parts, and these walls have kept the hardness of bumper/spoiler lower support thing, particularly at the Y0 place.Horizontal wall and vertical wall provide hardness to realize the rigidity of expectation during colliding.

Beam of the present invention can also have at least one in all following features:

In the described horizontal wall at least one is discontinuous;

In the described horizontal wall at least one is continuous;

It comprises the vertical wall of the travel direction that is parallel to vehicle;

It presents crenel (cr é neau) shape at least one section perpendicular to the travel direction of vehicle;

It presents the crenel shape at least one is parallel to the section of travel direction of vehicle;

It comprises connecting panel (voile) at face thereafter;

It comprises the collision bumper at its vertical end.

The present invention also provides a kind of vehicle bumper that comprises beam of the present invention.

The present invention also provides a kind of method of making beam of the present invention, wherein two parts is assembled together, and each parts has in the above-mentioned horizontal wall, and preferred in the vertical direction assembles.

The present invention also provides a kind of method of making beam of the present invention, wherein makes described bumper by molded, carries out the demoulding on the travel direction of vehicle.

According to the reference accompanying drawing other features and advantages of the present invention are further understood in the following description of a plurality of preferred embodiments, this preferred embodiment provides as non-limiting example, in described accompanying drawing:

Fig. 1 is the block diagram of the beam in first embodiment of the present invention;

Fig. 2 and 3 is beam cutaway views on section II-II and III-III respectively of Fig. 1;

Fig. 4 is the block diagram of the beam of second embodiment of the present invention;

Fig. 5 is the cutaway view of beam on the V-V of plane of Fig. 4;

Fig. 6 is the view of similar Fig. 5, shows another embodiment of beam of the present invention; And

Fig. 7 is the cutaway view of beam on the VII-VII of plane of Fig. 6.

Referring to figs. 1 through 3, in the first embodiment, beam 2 of the present invention comprises one section bar 4, and its length is extended transverse to the travel direction of vehicle in the horizontal direction.Traditional XYZ frame of reference has been shown among Fig. 1, and wherein directions X is represented the travel direction of vehicle, and the representative of Y direction is perpendicular to the horizontal direction of described travel direction, and the Z direction is represented vertical direction.

Bar 4 has a plurality of

vertical walls

6,8,10 and 12, and these vertical walls are parallel to the YZ plane and extend, that is, and and perpendicular to the travel direction extension of vehicle.In this embodiment, have four such walls, this can be clear that in the section of Fig. 3 especially.These walls are parallel to each other, are spaced from each other, and their extensions one after the other from front to back.

Bar 4 also has a large amount of vertical walls, and these vertical walls are parallel to the XZ plane,, is parallel to the travel direction of vehicle that is.These vertical walls 14 especially can be found out in Fig. 2.They are parallel to each other, and be spaced from each other, and their ends 16 from two ends 16 of beam 2 are to another terminal 16 arranged in succession.In the present embodiment, each vertical wall 14 intersects with all

vertical wall

6,8,10 and 12.

Bar 4 also has

horizontal wall

20 and 22, and the quantity of horizontal wall is two in this embodiment.As among the every width of cloth figure at Fig. 1 to 3 as can be seen, each in the

wall

20 and 22 all is discontinuous at X and Y direction.

Horizontal wall

20 or 22 every section all from two adjacent vertical walls 14 extend to another, but interrupt at the opposite side of described two walls 14.

Section

20 and 22 on the Y direction alternately so that can not pass through a section of the common abutment wall 22 in its base by one section vertical wall 14 of the common abutment wall 20 of its top margin, or the like.As finding out in Fig. 2, this generates the crenel structure.

Above-mentioned for the Y direction, transverse to the layout that the travel direction of vehicle extends, also be found in travel direction X and go up and extend, as shown in Figure 3.Therefore, in some XZ section, the section of roof 20 is by 10 supportings of the second and the 3rd vertical wall, and the section of diapire 22 is respectively by the first and second vertical walls 8 and 6 and supported by the third and fourth vertical wall 10 and 12.Other are parallel in the section on plane of Fig. 3 at some, and deployment scenarios is opposite.Therefore, exist crenel to arrange,, consider that the quantity of

vertical wall

6,8,10 and 12 is few here, this crenel arranges that making the profile of bar 4 is Ω shape.

Therefore, as shown in Figure 1, the top horizontal wall has chessboard structure.Same situation is applicable to end horizontal wall.

Wall

20 and 22 flushes with the top margin of

vertical wall

6,8,10,12 and 14 and base and extends.

The wall 12 of back is lower than adjacent wall 10, so that the top margin from wall 10 of horizontal wall 20 interrupts towards the rearmost section respective ramp 24 that is connected to the wall 12 of back that vehicle rear extends.

Beam 2 also has two collision bumpers 26 of the end that is arranged in bar 4.Whole beam 2 is molded with single molded operation.Beam is made by plastic material.Bumper comprises having vertical wall that is parallel to the XZ plane and the lattice case 28 with horizontal wall, and these lattice casees are towards the rear portion opened of vehicle.Bumper is designed to be fixed to the front end of vehicle longeron.Bar 4 from two inner surfaces 30 of above-mentioned bumper extends to another.

Crenel shape shown in Fig. 2 and 3 is used for giving the beam good stable by producing two discontinuous horizontal wall 20 and 22.Arrow 32 among Fig. 3 is illustrated in bump direction to the impact of beam during the pedestrian.Another arrow 34 is illustrated in other power that act on during the collision on the beam.In Fig. 2, arrow 36 also is illustrated in the power that beam is subjected to during the collision.

Discontinuous wall

20 and 22 gives the stability of beam deflection aspect.In the embodiment of Fig. 1, as can be seen, beam does not have connecting panel at the rear portion of bar 4.

Second embodiment of beam of the present invention 40 shown in Figure 4.This beam is identical with the beam 2 of Fig. 1, and just it also is included in bar 4 back and the connecting panel 42 of extension between above-mentioned two bumpers 26.Especially, this connecting panel constitutes streamlined reefer housing.Can regulation connecting panel 42 be planes.Yet, as shown in Figure 4, it can also be given one with similarly construct at bar 4 described structures, wherein chessboard structure appears at its top and bottom.Therefore, can see two

horizontal wall

20 and 22 and two other

vertical walls

46 and 48 on connecting panel 42, described

vertical wall

46 and 48 is parallel to

wall

6,8,10 and 12 and from described

wall

6,8,10 and 12 arranged in succession.As can be seen, some in the vertical wall 14 of bar extend into described connecting panel.Particularly, just there is a wall 14 to extend in per three walls 14 in this mode.

Wall 46 between

wall

12 and 48 is continuous, so that it extends to another bumper 26 from a bumper 26, and rearmost wall 48 is discontinuous and so that

wall

20 and 22 is interrupted in the modes that vertically replace between the wall 14.Therefore, with on connecting panel 42, form the lattice case in mode identical on the bar 4, each described lattice case at one end is an osed top, thereby forms box, this box is being parallel to the Y direction and is being parallel to alternately sealing on the direction of directions X simultaneously.As can be seen, connecting panel 42 has two row's boxes on directions X in this embodiment, has seven row's boxes on the Y direction.Therefore, connecting panel has chessboard structure.

Under situation about bumping, connecting panel is the rigidity and the stability of strengthened beam 40 also.Can regulation the rear end of connecting panel 42 be fixed to streamlined reefer housing, engine bed or the like under vehicle structure, its preceding face, the driving engine.

Under situation about bumping, under the situation that repairable collision (with 16 kilometers speed of (km/h) per hour) take place, the lower support thing that is formed by

beam

2 and 40 also has endergonic function the most in particular.Energy absorbs by bumper 26, also absorbs by bar, and may absorb by connecting panel.

During the beam shown in molded Fig. 1 and 4, on directions X, carry out the stripping operation of bumper.

In the embodiment of Fig. 1 and 4,

horizontal wall

20 and 22 section are on the bar, and the mode that replaces, to make that these parts are easy to molded by making these parts be aligned on the vertical direction demoulding with bar and connecting panel--in case of necessity on connecting panel--.

In the 3rd embodiment shown in Fig. 6, beam 50 has the

wall

20 and 22 of level or basic horizontal, and this wall is continuous on the Y direction, promptly, is continuous from a bumper 26 to another bumper 26, and also is continuous in the front portion from beam to the directions X at rear portion.

For the beam of shop drawings 6 and 7, can stipulate separately to make top part 54 and bottom parts 56, this top part 54 and bottom parts 56 comprise

horizontal wall

20 and 22 respectively, and some vertical walls.Two

parts

54 and 56 vertically are being assembled together on the assembly direction by adhesives or heat seal.Can stipulate to form by two

parts

54 and 56, thereby obtain double-thickness such as in the vertical wall of

wall

6,8,10,12,46 and 48 at least some.

The bumper/spoiler that comprises beam of the present invention also preferably has girder above underbeam and bumper/spoiler housing or the like.

Certainly, can carry out a large amount of modification to the present invention, and not exceed scope of the present invention.

The section of crenel shape as shown in Figure 2 can be provided, and not rely on the existence of a plurality of

vertical walls

6,8,10 and 12.

Can stipulate that beam is not the lower support beam, but the bumper/spoiler girder, and can be the beam that is used for rear bumper.

Can stipulate that beam is made by thermoplastic material, for example make by polypropylene.

Claims

1. beam (2 that is used for vehicle bumper; 40; 50), comprise at least two horizontal wall (20,22), it is characterized in that it further comprises the vertical wall (6,8,10,12 that at least two travel direction transverse to vehicle (X) extend; 46,48), and it presents the crenel shape at least one section perpendicular to the travel direction of vehicle, and presents the crenel shape at least one is parallel to the section of travel direction of vehicle.

2. according to the beam of aforementioned claim, it is characterized in that described beam forms the lower support beam.

3. according to the beam of claim 1 or 2, it is characterized in that at least one in the described horizontal wall (20,22) is discontinuous.

4. according to the beam of claim 1 or 2, it is characterized in that at least one in the described horizontal wall is continuous (20,22).

5. according to the beam of claim 1 or 2, it is characterized in that it comprises the vertical wall (14) of the travel direction (X) that is parallel to vehicle.

6. according to the beam of claim 1 or 2, it is characterized in that it comprises connecting panel (42) at face thereafter.

7. according to the beam of claim 1 or 2, it is characterized in that it comprises collision bumper (26) at its vertical end.

8. a vehicle bumper is characterized in that, it comprises the beam according to claim 1 or 2.

9. a manufacturing is characterized in that according to the method for the beam of claim 1 or 2 two parts (54,56) are assembled together, and each parts has in the described horizontal wall (20,22).

10. according to the method for the manufacturing beam of claim 9, it is characterized in that, on vertical direction (Z), carry out described assembling.

11. a manufacturing is characterized in that according to the method for the beam of claim 7, by the molded described bumper (26) of making, carries out the demoulding of described bumper (26) on the travel direction (X) of vehicle.