CN207773075U - A kind of automobile collision energy absorber of classification crumple - Google Patents

Abstract

The utility model discloses a graded collapsed automobile collision energy absorbing device, comprising an energy absorbing box (2) placed between two flanges (11, 12) and having an energy absorbing inner core (3) inside. The core (3) includes a stamping head (31) with a V-shaped end and a plane at the other end, and two bases (32, 33) with a V-shaped end and a plane at the other end that are placed on both sides of the stamping head (31). , the V-shaped end of the base (32, 33) is opposite to the V-shaped end of the stamping head (31), and the energy-absorbing material I (34) is filled therebetween, and the plane end of the stamping head (31) is connected to the rectangular One end of the tube (35) is connected, the other end of the rectangular tube (35) is fixedly connected to the first flange (11), and the first flange (11) and the stamping head (31) in the rectangular tube (35) are connected to each other. Fill with energy-absorbing material II (36). The energy absorbing device of the utility model is easy to disassemble, the parts can be recycled, the energy absorbing efficiency is high, and the energy absorbing performance can be adjusted.

Description

A car crash energy-absorbing device with graded collapse

technical field

The utility model belongs to the technical field of vehicle anti-collision energy-absorbing devices, in particular to an automobile collision energy-absorbing device which is easily disassembled, has recyclable parts, high energy-absorbing efficiency and adjustable energy-absorbing performance.

Background technique

An energy absorbing device is usually installed between the longitudinal beam of the automobile and the anti-collision beam to reduce the damage of the collision to the longitudinal beam of the automobile and the occupants in the vehicle. Automotive energy-absorbing devices are usually made of alloy steel or aluminum alloy, etc. Its basic principle is: when the vehicle collides, the energy-absorbing device absorbs all the impact force and deforms itself, reducing the rear longitudinal beam (body-in-white structure) harm.

Existing technologies such as the Chinese invention patent "A negative Poisson's ratio structure energy-absorbing box and its multi-objective optimization method" (application number: CN201710195801.1, publication date: 2017-07-07, publication number: CN106934175A), which discloses A negative Poisson's ratio structure energy-absorbing box is proposed, which is composed of an energy-absorbing box body, a front mounting plate, a rear mounting plate and a three-dimensional negative Poisson's ratio structure inner core.

The problems of this energy-absorbing box are: 1) The energy-absorbing box is not easy to disassemble; 2) Once it is deformed by collision, it must be replaced completely, and the parts cannot be recycled; 3) It does not have the ability to collapse in stages, and it will all be broken even at low speeds .

Contents of the invention

The purpose of the utility model is to provide a graded collapsed automobile collision energy-absorbing device, which is easy to disassemble, recyclable parts, high energy-absorbing efficiency, and adjustable energy-absorbing performance.

The technical solution to realize the purpose of this utility model is:

A car crash energy absorbing device with graded collapse, including a first flange 11 for connecting with the car anti-collision beam and a second flange 12 for connecting with the car longitudinal beam, and also includes an energy-absorbing box body 2 and the energy-absorbing inner core 3 placed in the energy-absorbing box body 2,

The energy-absorbing box 2 includes a first box 21 and a second box 22 that are detachably connected to each other at one end, the other end of the first box 21 is fixedly connected to the first flange 11, and the second box The other end of the body 22 is fixedly connected with the second flange 12;

The inner core 3 includes a stamping head 31 with a V-shaped end and a plane at the other end, and two bases 32, 33 with a V-shaped end and a plane at the other end, which are placed on both sides of the stamping head 31. , 33 plane one end is fixedly connected with the second flange 12, the V-shaped end of the base 32, 33 is opposite to the V-shaped end of the stamping head 31, and the energy-absorbing material I34 is filled therebetween, and the plane end of the stamping head 31 is connected to a set of One end of the rectangular tube 35 connected to the outside is connected, and the other end of the rectangular tube 35 is fixedly connected with the first flange 11, and the energy-absorbing material is filled between the first flange 11 and the stamping head 31 in the rectangular tube 35 II36.

Compared with the prior art, the utility model has the remarkable advantages of:

1. Easy to disassemble and recyclable parts: the energy-absorbing device can be disassembled into multiple parts; parts that have not deformed during the collision can be recycled during maintenance, saving costs and improving the utilization rate of parts .

2. High energy-absorbing efficiency and adjustable energy-absorbing performance: the energy-absorbing material can be compressed by two-way compression, which can greatly improve its energy-absorbing efficiency; the energy-absorbing performance can be realized by adjusting the thickness of the parts and the porosity of the energy-absorbing material. adjustable.

3. It has graded collapse performance: it adopts materials of different strengths and special structural layout, which can effectively absorb energy and reduce the damage of energy-absorbing devices under low-speed collisions, unlike traditional energy-absorbing devices that will collapse even at low speeds. All damaged.

Description of drawings

Fig. 1 is a structural schematic diagram of the vehicle collision energy-absorbing device for graded collapse of the utility model.

Fig. 2 is a schematic diagram of the internal structure of Fig. 1 after the energy-absorbing box is removed.

Fig. 3 is a front view of Fig. 2 .

FIG. 4 is a sectional view of FIG. 2 .

Fig. 5 is a schematic structural view of the first energy-absorbing box in Fig. 1 .

Fig. 6 is a schematic structural view of the second energy-absorbing box in Fig. 1 .

In the figure, the first flange 11, the screw hole 111, the second flange 12, the screw hole 121, the energy-absorbing box body 2, the first box body 21, the second box body 22, the sleeve head 221, the screw hole 222, 211, bolts 223, deformation guide grooves 215, 225, 315, 325, 335, energy-absorbing inner core 3, stamping head 31, bases 32, 33, energy-absorbing material I34, rectangular tube 35 energy-absorbing material II36.

Detailed ways

As shown in Fig. 1, the automobile collision energy-absorbing device of the utility model graded collapse includes a first flange 11 connected to the automobile anti-collision beam and a second flange 12 connected to the automobile longitudinal beam , also includes an energy-absorbing box body 2 and an energy-absorbing inner core 3 placed in the energy-absorbing box body 2, characterized in that:

The energy-absorbing box 2 includes a first box 21 and a second box 22 that are detachably connected to each other at one end, the other end of the first box 21 is fixedly connected to the first flange 11, and the second box The other end of the body 22 is fixedly connected with the second flange 12;

The inner core 3 includes a stamping head 31 with a V-shaped end and a plane at the other end, and two bases 32, 33 with a V-shaped end and a plane at the other end, which are placed on both sides of the stamping head 31. , 33 plane one end is fixedly connected with the second flange 12, the V-shaped end of the base 32, 33 is opposite to the V-shaped end of the stamping head 31, and the energy-absorbing material I34 is filled therebetween, and the plane end of the stamping head 31 is connected to a set of One end of the rectangular tube 35 connected to the outside is connected, and the other end of the rectangular tube 35 is fixedly connected with the first flange 11, and the energy-absorbing material is filled between the first flange 11 and the stamping head 31 in the rectangular tube 35 II36.

Preferably, the end of the second box body 22 connected to the first box body 21 is provided with a sleeve head 221 for the insertion of the first box body 21 , and one end of the first box body 21 is inserted into the sleeve head 221 to connect with the second box body 22 Removable fastening.

Screw holes 222 and 211 are provided on the side wall of the sleeve head 221 and the side wall of the first box body 21 inserted into the sleeve head 221 , and the first box body 21 is detachably fixed to the second box body 22 by bolts 223 .

Through the above design, the energy absorbing device can be easily assembled and disassembled, as shown in Figures 1 and 2, which facilitates the maintenance and replacement of parts.

As an improvement,

The side walls of the first box body 21 and the second box body 22 are provided with deformation guide grooves 215 and 225 .

A deformation guide groove 315 is formed on the side wall of the stamping head 31 .

Deformation guide grooves 325 , 335 are provided on the side walls of the bases 32 , 33 .

As shown in Figures 2, 5 and 6, the deformation guide grooves guide the rapid and uniform deformation of each structure, thereby improving their energy absorption efficiency.

Preferably,

The V-shaped opening angle of the bases 32, 33 is 90 degrees.

The V-shaped opening angle of the stamping head 31 is 90 degrees.

Preferably, the V-shaped ends of the two bases 32 and 33 are placed opposite to the V-shaped end of the stamping head 31 with a clearance fit.

As shown in FIG. 4 , the opening angle of 90 degrees and the relative arrangement can realize bidirectional compression of the energy-absorbing material I34 in the direction of frontal collision, thereby improving its energy-absorbing efficiency.

One end of the plane of the stamping head 31 is connected with one end of the rectangular tube 35 through interference fit.

The energy-absorbing material I34 and the energy-absorbing material II36 are aluminum foam materials, wherein the porosity of the energy-absorbing material I34 is 70%, and the porosity of the energy-absorbing material I36 is 80%.

In order to be connected with the anti-collision beam of the automobile and the longitudinal beam of the automobile, the first flange (11) is provided with bolt holes (111); the second flange (12) is provided with bolt holes (121) .

The working process of the present utility model is as follows:

The energy absorbing device is fixed on the anti-collision beam of the automobile through the screw hole 111 of the first flange 11, and then fixed on the longitudinal beam of the automobile through the screw hole 121 of the second flange 12 to complete the installation work. Taking the frontal collision of a car at low speed as an example, in this embodiment, when the collision occurs, the front anti-collision beam transmits the collision energy to the energy-absorbing box of the car, and the energy-absorbing box body 22 first begins to collapse and absorb energy, and its side walls The deformation guide groove 225 on the top can guide rapid collapse and improve the uniformity of overall deformation. At the same time, because the strength of the energy-absorbing material I34 is higher than that of the energy-absorbing material II36, the V-shaped stamping head 31 first compresses the energy-absorbing material II36 after being stressed to make it gradually compact, which is the first-stage collapse process. As the first flange 11 continues to advance, the stamping head 31 is driven to compress the energy-absorbing material I34. Due to the two-way compression method, the energy-absorbing material I34 has a high energy-absorbing efficiency. This is the second-stage collapse process. If the collision process is no longer carried out, the structures of the first energy-absorbing box 21 and the bases 32 and 33 remain intact and can be recycled during maintenance, saving costs and improving the utilization rate of materials. If the collision process continues under medium and high-speed frontal collision, when the energy-absorbing material I34 is compacted, the first energy-absorbing box body 21, the stamping head 31 and the base 32, 33 begin to deform and absorb energy, and the deformation guide grooves 215, 325 And 335 to guide them to collapse quickly and uniformly, this is the third stage collapse process.

Claims (10)

1. an automobile collision energy-absorbing device of graded collapse, comprising a first flange (11) for being connected with the automobile anti-collision beam and a second flange (12) for being connected with the longitudinal beam of the automobile, It also includes an energy-absorbing box (2) and an energy-absorbing inner core (3) placed in the energy-absorbing box (2), characterized in that: The energy-absorbing box (2) includes a first box (21) and a second box (22) that are detachably connected to each other at one end, and the other end of the first box (21) is connected to the first flange The disk (11) is fixedly connected, and the other end of the second box body (22) is fixedly connected with the second flange (12); The inner core (3) includes a stamping head (31) with a V-shaped end and a plane at the other end, two bases (32) with a V-shaped end and a plane at the other end that are arranged on both sides of the stamping head (31). , 33), one end of the plane of the base (32, 33) is fixedly connected with the second flange (12), the V-shaped end of the base (32, 33) is opposite to the V-shaped end of the stamping head (31), and the filling Energy-absorbing material I (34), one end of the plane of the stamping head (31) is connected to one end of a rectangular tube (35) sleeved outside it, and the other end of the rectangular tube (35) is connected to the first flange ( 11) Fixed connection, the energy-absorbing material II (36) is filled between the first flange (11) and the stamping head (31) in the rectangular tube (35). 2. The energy absorbing device according to claim 1, characterized in that: The second box body (22) is connected with the first box body (21) and one end is provided with a sleeve (221) that can be inserted into the first box body (21), and one end of the first box body (21) is inserted into the sleeve ( 221) is detachably fixed with the second box body (22). 3. The energy absorbing device according to claim 2, characterized in that: The side wall of the sleeve head (221) and the side wall of the first box body (21) inserted into the sleeve head (221) are all provided with screw holes (222, 211), and the first box body (21) is passed through the bolt (223) It is detachably fixed with the second box body (22). 4. The energy absorbing device according to claim 1, characterized in that: Both the side walls of the first box body (21) and the second box body (22) are provided with deformation guide grooves (215, 225). 5. The energy absorbing device according to claim 1, characterized in that: A deformation guide groove (315) is provided on the side wall of the stamping head (31). 6. The energy absorbing device according to claim 1, characterized in that: Deformation guide grooves (325, 335) are provided on the side walls of the bases (32, 33). 7. The energy absorbing device according to claim 1, characterized in that: The V-shaped opening angle of the base (32, 33) is 90 degrees. 8. The energy absorbing device according to claim 1, characterized in that: The V-shaped opening angle of the stamping head (31) is 90 degrees. 9. The energy absorbing device according to claim 1, characterized in that: The V-shaped one ends of the two bases (32, 33) and the V-shaped one end of the stamping head (31) are placed oppositely with clearance fit. 10. The energy absorbing device according to claim 1, characterized in that: One flat end of the stamping head (31) is connected with one end of the rectangular tube (35) through interference fit.