CN201240339Y

CN201240339Y - Collision energy-absorbing component for automobile

Info

Publication number: CN201240339Y
Application number: CNU2007201905054U
Authority: CN
Inventors: 陈潇凯; 李邦国; 林逸; 崔灿
Original assignee: Beijing Institute of Technology BIT
Current assignee: Beijing Institute of Technology BIT
Priority date: 2007-11-30
Filing date: 2007-11-30
Publication date: 2009-05-20
Anticipated expiration: 2017-11-30

Abstract

The utility model relates to a vehicle energy absorption component in the course of collision. The component is arranged between a vehicle lateral edge beam and a bumper and has a hollow polygonal cross-sectional shape, and a hollow groove is formed on each side wall thereof along the axis direction, so as to reduce the weight of the energy absorption component via adjustment of the axial rigidity of the energy absorption component while maintaining expected impact energy absorption quality. The energy absorption component has a symmetrical structure, the hollow grooves on the two side walls thereof are symmetric with respect to a vertical plane through which the axial line thereof passes, and the energy absorption component is also symmetric with respect to a horizontal plane where the axial line thereof locates. In the case of suffering from an axial compression load, the energy absorption component is compressed into a corrugated shape along the axial direction to absorb impact energy. In order to obtain better compression and corrugation, the size of the hollow grooves can be adjusted, or the number of the hollow grooves can be increased.

Description

A kind of automobile-used collision energy-absorbing parts

Technical field

The utility model relates to a kind of automobile-used collision energy-absorbing parts, and relating in particular to is not a kind ofly increasing part quality, do not taking under the condition of greater room, has good deformation pattern and absorbs the collision energy-absorbing parts that the ability of impact energy strengthens greatly.

Background technology

Automobile is as the topmost vehicle, and the personnel death that its traffic accident causes accounts for the first place of all kinds of accident personnel death's numbers, and in automobile collision procedure, what occurrence probability was the highest is frontal crash of vehicles.In a single day automobile crashes, the huge kinetic energy that automobile had before collision in the extremely short time (about hundreds of millisecond) with the energy dissipation of other form.Kinetic energy in the collision absorbs mainly to be finished by the METHOD FOR LARGE DEFORMATION ELASTOPLASTIC of metal construction, and therefore, the performance of collision energy-absorbing parts has material impact to the damage of car body and occupant's safety.Present known energy-absorbing parts generally have circle and square-section, and it is disposed between motor insurance lever and the side bar, and when being compressed load, the energy-absorbing parts are axially crumpling into bellows-shaped, to absorb impact energy.But, for round section and square-section energy-absorbing parts, easy unstability when load is asymmetric; Although square-section collision energy-absorbing parts have bigger axial stiffness, because its deformation pattern instability, after the axial load conquassation, the axial counter-force fluctuation big rise and fall that it provides, average counter-force reduces rapidly.And owing to have higher axial stiffness, square-section collision energy-absorbing parts have bigger counter-force peak value at the collision initial stage, and therefore cooresponding impact deceleration/decel is also bigger.

Summary of the invention

The automobile-used collision energy-absorbing parts of design-calculated mainly are that the collision energy-absorbing parts are housed between automobile side girders and bumper rail to the purpose of this utility model for the deficiency that overcomes above-mentioned prior art just.The collision energy-absorbing parts have hollow polygonal cross-section shape, and shape of cross section can be hollow " a 8 " font.Be disposed in the novel automobile collision energy-absorbing parts between automobile side girders and the bumper rail, when being compressed load, these energy-absorbing parts are axially being crumpled into corrugatedly, absorb impact energy.

The technical scheme that the utility model adopted is: by existing circle and square-section energy-absorbing parts are analyzed, start with from adjusting its axial stiffness, utilize the method for topological optimization, the distribution of material that is optimized, and then satisfy the demand of axial stiffness to material by the method that the concave groove is set on energy-absorbing component axes direction, obtained having the novel collision energy-absorbing parts of " 8 " font cross sectional shape.

Beneficial effect

Adopt the utility model when keeping certain impact energy and absorbing quality, these parts have less quality, realize lightweight, and this utility model energy-absorbing block construction simple, be convenient to processing, cost is lower.

Description of drawings

Fig. 1 is the birds-eye view of Federal bumper and near parts thereof

Fig. 2 is the series of values simulation curve

Fig. 3 is an automobile-used collision energy-absorbing part cross section cutaway view (perpendicular to axis direction)

To be the collision energy-absorbing parts be welded to block diagram on the terminal pad with angle bar to Fig. 4 a

To be the collision energy-absorbing parts be welded to constructional drawing on the terminal pad with angle bar to Fig. 4 b

Fig. 5 a is that the collision energy-absorbing parts directly weld block diagram

Fig. 5 b is the direct welded structure figure of collision energy-absorbing parts

Fig. 6 a is that collision energy-absorbing parts one end is processed into flange welding block diagram

Fig. 6 b is that collision energy-absorbing parts one end is processed into flange welded structure figure

Among the figure: 1-bumper rail, 2L, 2R-terminal pad, 3L, 3R-terminal pad, the left and right collision energy-absorbing parts of 4L, 4R-, 5L, the left and right side bar of 5R-automobile, 6-angle bar, 7-flange.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further specified:

Among Fig. 1, collision energy-absorbing parts 4 are arranged between bumper rail 1 and the automobile side bar 5 by terminal pad 2,3.When being subjected to the vehicle front owing to impacting the clamp load apply, the collision energy-absorbing parts are axially crumpling into bellows-shaped, absorb impact energy and cushion the impact that is applied to such as on automobile side bar 5 structure members such as grade in deformation process.

Fig. 2 has shown three kinds of absorption powers with collision energy-absorbing parts impact energy of equal in quality, same thickness, different cross section shape.Curve shows is relation between amount of energy and the displacement variable.

Fig. 3 is broken away perpendicular to its axis direction at its axial centre portion for the collision energy-absorbing parts, and its cross sectional shape is complete " 8 " font.These energy-absorbing parts are symmetrical structure, can moulding obtain on hydraulic efficiency equipment, and half energy-absorbing parts of at first moulding " 3 " font on hydraulic efficiency equipment become complete " 8 " font collision energy-absorbing parts by two " 3 " font unit constructions.

Fig. 4-Fig. 6 is welded to the view of pattern on the link regularly for explanation three class collision energy-absorbing parts.In Fig. 4, the collision energy-absorbing component axial vertically withstands on the link, by angle bar 6 collision energy-absorbing parts and terminal pad 3 is fixed together, and employed fixed form is welding; In Fig. 5, the axial end of collision energy-absorbing parts is stretched out, form flange 7, contact with terminal pad 3 and they are fixed by flange 7 by welding; In Fig. 6, the collision energy-absorbing component axial vertically withstands on the link, directly is fixed on the terminal pad 3 by welding.

Collision energy-absorbing parts 4 are processed into hollow polygonal cross-section shape.Shape of cross section can be hollow " a 8 " font.Can be earlier with flat-plate molded be " 3 " font parts, become " 8 " fonts by two " 3 " font unit constructions.

The energy-absorbing parts of this cross sectional shape can provide bigger axial stiffness in the utility model, and promptly under the situation of keeping same impact energy absorption quality, the quality of these energy-absorbing parts compares less, has realized the weight-saving purpose; The axial stiffness of these parts has adjustable row.The sidewall of these energy-absorbing parts is provided with the concave groove about the plane symmetry of passing through its axis, can control axial stiffness by the size of adjustment concave groove or the quantity of concave groove, to obtain suitable axial axial stiffness and good deformation pattern.These utility model energy-absorbing parts can be fixed on these energy-absorbing parts on the terminal pad by angle bar 6, terminal pad 3 are fixed on bumper rail and the automobile side bar then; Also can be molded into flange 7, be fixed on the terminal pad 3, terminal pad 3 is fixed on bumper rail 1 and the automobile side bar 5 then by welding or bolted connection at the two ends of these energy-absorbing parts; Can also directly be welded on the terminal pad 3, be fixed on bumper rail 1 and the automobile side bar 5 by terminal pad 3 then by the mode of welding.When welding in order to guarantee these novel energy-absorbing parts and to be unlikely to be melted and forming hole, should guarantee that these energy-absorbing parts have certain thickness.

Claims

1. automobile-used collision energy-absorbing parts comprise bumper rail, terminal pad, vehicle right and left side bar, it is characterized in that: the collision energy-absorbing parts are housed between automobile side girders and bumper rail.

2. automobile-used collision energy-absorbing parts according to claim 1 is characterized in that: the collision energy-absorbing component processing becomes hollow polygonal cross-section shape.

3. automobile-used collision energy-absorbing parts according to claim 2 is characterized in that: the shape of cross section of collision energy-absorbing parts can be hollow " a 8 " font.

4. automobile-used collision energy-absorbing parts according to claim 2 is characterized in that: the collision energy-absorbing parts are the equal thickness thin-slab structure.

5. automobile-used collision energy-absorbing parts according to claim 2 is characterized in that: the collision energy-absorbing parts are symmetrical structure, and it is about horizontal surface and vertical surface symmetry by its longitudinal axis.