CN103318112A

CN103318112A - Heavy duty vehicle bionic rear bumper

Info

Publication number: CN103318112A
Application number: CN2013102907235A
Authority: CN
Inventors: 孙博华; 朱冰; 张峻恺; 韩嘉懿; 赵东炎; 郭俐彤
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2013-07-11
Filing date: 2013-07-11
Publication date: 2013-09-25

Abstract

The invention discloses a heavy duty vehicle bionic rear bumper which is formed by an inner layer and an outer layer. The section structure of the outer layer is triangular. On the basis of the principle of similitude of bionics, the cross section of the bionic rear bumper is designed to be in a right angled isosceles triangle. The average value of radii of a steering knuckle is 120mm which is used as the radius of a circular arc. The inner structural design of the bionic rear bumper simulates the inner layer structural features of the steering knuckle, and a reinforced rib structure is designed to improve rigidity of a system. Meanwhile, in order to simulate a porous structure of the steering knuckle, the porous structure is also designed in the inner layer structure of the bionic rear bumper to improve energy absorption properties of the system. The inner layer and the outer layer are assembled together in a transition fit mode, and therefore collision energy absorption capacity of the heavy duty vehicle bionic rear bumper is greatly improved.

Description

The bionical rear bumper of heavy goods vehicles

Technical field

The invention belongs to the automotive engineering field, relate to the heavy goods vehicles rear bumper, or rather, the present invention relates to the bionical rear bumper of heavy goods vehicles.

Background technology

The heavy goods vehicles rear bumper is the main load mechanism in the rear-end impact process, now has been widely used in all kinds of heavy goods vehicles, so, must guarantee that it has good strength characteristic and energy-absorbing feature, reached protection occupant purpose of safety.Traditional heavy goods vehicles rear bumper method of designing adopts empirical data design more, has very strong randomness, lacks the science Study on Mechanism, has more design defect and dangerous hidden danger.

The bionic solution that develops into a modern science and technology difficult problem provides a new approach.According to bionic principle, some biological structure has good energy absorption characteristics and structural strength as tooth, bone, hoof, goat's horn etc., and this has important reference role for the design rear bumper.Based on all deficiencies and the bionic relevant knowledge of existing heavy goods vehicles rear bumper, we have researched and developed the bionical rear bumper of heavy goods vehicles, to improve the collision energy-absorbing ability of rear bumper, guarantee occupant's safety to greatest extent.

Summary of the invention

It is that the design of conventional heavy-duty car rear bumper is random that the present invention will solve, and quality is bigger, and problems such as collision energy-absorbing weak effect provide a kind of heavy goods vehicles bionical rear bumper.

For solving the problems of the technologies described above, the present invention adopts following technical scheme to realize: the bionical rear bumper of heavy goods vehicles is made up of internal layer and outer two parts.

Wherein, outer section structure is triangle, its three limit angle α 1, and α 2, α 3 and arc radius R1, R2, R3 are main design parameters.According to the bionics principle of similitude, bionical rear bumper is designed to right angled isosceles triangle, get the aviation value 120mm of goat's horn radius as design radii.

The design simulation of bionical rear bumper endothecium structure goat's horn endothecium structure characteristics, designed reinforcing rib structure, to improve system stiffness; Simultaneously, for simulation goat's horn open texture, in bionical rear bumper endothecium structure, also design open texture, improved the energy absorption characteristics of system.

The bionical rear bumper internal layer of heavy goods vehicles fits together by transition fit with outer, has therefore improved the collision energy-absorbing ability of device greatly.

Compared with prior art, the invention has the beneficial effects as follows:

1, the bionical rear bumper of heavy goods vehicles of the present invention has overcome the randomness in the traditional design, carries out scheme selection and parameter optimization based on the bionics principle of science

2, the bionical rear bumper of heavy goods vehicles of the present invention is compared with traditional heavy goods vehicles rear bumper, and intensity is higher, and mechanism is more reasonable, has better collision energy-absorbing effect, thereby can guarantee occupant's safety to a greater extent.

3, the bionical rear bumper of heavy goods vehicles of the present invention combines the relevant issues of automotive field with bionics techniques, utilizes bionics techniques to solve existing automobile problem, has represented the development tendency of modern science and technology, has the large development space.

Description of drawings

Below in conjunction with accompanying drawing this patent is described further:

Fig. 1 is the axonometric projection graph of the integral body of the bionical rear bumper of heavy goods vehicles of the present invention.

Among the figure: 1. the bionical rear bumper skin of bionical rear bumper internal layer 2. heavy goods vehicles of heavy goods vehicles

The present invention will be further described below in conjunction with accompanying drawing:

The bionical rear bumper of heavy goods vehicles is made up of internal layer 1 and outer 2 two parts.Wherein, outer 2 section structures are triangle, its three limit angle α 1, and α 2, α 3 and arc radius R1, R2, R3 are main design parameters.According to the bionics principle of similitude, be right angled isosceles triangle with bionical rear bumper Section Design, get the aviation value 120mm of goat's horn radius as design radii.Bionical rear bumper internal layer 1 structure design has been simulated goat's horn endothecium structure characteristics, has designed reinforcing rib structure, to improve system stiffness; Simultaneously, for simulation goat's horn open texture, in bionical rear bumper endothecium structure, also design open texture, improved the energy absorption characteristics of system.

Claims

1. the bionical rear bumper of heavy goods vehicles is characterized in that: the bionical rear bumper of heavy goods vehicles is made up of internal layer (1) and outer (2) two parts; Wherein, outer (2) section structure is triangle, according to the bionics principle of similitude, is right angled isosceles triangle with bionical rear bumper Section Design, gets the aviation value 120mm of goat's horn radius as design radii; Bionical rear bumper internal layer (1) structure design has been simulated goat's horn endothecium structure characteristics, designed reinforcing rib structure, to improve system stiffness, simultaneously, for simulation goat's horn open texture, in bionical rear bumper endothecium structure, also designed open texture, improve the energy absorption characteristics of system, the bionical rear bumper internal layer of heavy goods vehicles fits together by transition fit with outer, has therefore improved the collision energy-absorbing ability of device greatly.