CN209870310U - Novel automobile energy absorption box structure - Google Patents
Novel automobile energy absorption box structure Download PDFInfo
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- CN209870310U CN209870310U CN201822125343.7U CN201822125343U CN209870310U CN 209870310 U CN209870310 U CN 209870310U CN 201822125343 U CN201822125343 U CN 201822125343U CN 209870310 U CN209870310 U CN 209870310U
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Abstract
The utility model discloses a novel car energy-absorbing box structure, include: a first case and a second case; the upper end of a thin-wall circular tube of the first box body is fixedly connected with the flange plate, and the inner filling honeycomb is arranged in the thin-wall circular tube; the upper end of the side wall of the thin-wall circular tube is provided with a defective circular hole, and the defective circular hole is arranged at the wave crest, the wave trough and the middle axis of the sine curve; the lower end of the side wall of the thin-wall circular tube is provided with an induction groove, the wavelength of the thin-wall tube in one crushing folding is assumed to be 2H, and the induction groove is positioned at the half-wavelength H of the bending folding; the flange plate is fixed on the anti-collision beam through bolts; the carbon fiber plate of the second box body is arranged in the thin-wall conical structure, the thin-wall conical structure is divided into three chambers along the vertical direction, and the first filling honeycomb, the second filling honeycomb and the third filling honeycomb are respectively arranged in the chambers from top to bottom; the second flange plate is arranged at the lower end of the thin-wall conical structure and is fixed on the anti-collision longitudinal beam through bolts; the lower end of the thin-wall circular tube is connected with the upper end of the thin-wall conical structure.
Description
Technical Field
The utility model relates to a passive safety protection field of car especially relates to a novel car collision energy-absorbing box device.
Background
With the progress of industrial technology, the automobile industry develops rapidly, the occupied quantity of people is remarkably increased, and the traffic accidents are caused to occur frequently while the living standard of human beings is improved. Motor vehicle traffic accidents have been a worldwide problem threatening the safety of human life and property, and thus improving the protection of automobiles against collisions has been a challenging issue. When an automobile collides, collision kinetic energy is converted into deformation energy through irreversible deformation by mainly using the collision-proof beams and the energy absorption boxes at the front part and the rear part of the automobile body so as to play a role in protecting the safety of personnel. And studies have shown that the crash box structure of an automobile can absorb about 50% of the impact energy when the automobile is in a frontal collision. At present, the energy absorption box structure applied to most automobile bodies is still a common structural pipe fitting and comprises a thin-wall square pipe, a thin-wall round pipe and the like. Therefore, the conventional thin-wall energy absorption box structure cannot meet the requirement of the current automobile safety on an anti-collision structure, and the design of a novel energy absorption box structure is urgent.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that overcome traditional energy-absorbing box energy-absorbing unstability, the energy-absorbing is efficient, and the multi-angle strikes the poor scheduling problem of adaptation, designs out simple structure, lasts the higher car energy-absorbing box of high efficiency energy-absorbing and stability to passenger's protection in pedestrian and the car when improving the collision, thereby effectively ensure people life and property safety.
In order to solve the technical problem, the utility model provides a novel car energy-absorbing box structure, include: a first case and a second case;
the first box body consists of a first flange plate, a thin-wall circular tube and an internal filling honeycomb; the upper end of the thin-wall circular tube is fixedly connected with the flange plate, and the inner part of the thin-wall circular tube is filled with honeycombs and arranged in the thin-wall circular tube;
the upper end of the thin-wall circular tube is provided with a defective circular hole, and the defective circular hole is arranged at the wave crest, the wave trough and the middle axis of the sine curve; the lower end of the side wall of the thin-wall circular tube is provided with an induction groove, the wavelength of the thin-wall tube in one crushing folding is assumed to be 2H, and the induction groove is positioned at the half-wavelength H of the bending folding; the flange plate is fixed on the anti-collision beam through bolts;
the second box body consists of a thin-wall conical structure, a carbon fiber plate, a first filling honeycomb, a second filling honeycomb, a third filling honeycomb and a second flange plate; the carbon fiber plate is arranged in the thin-wall conical structure, the thin-wall conical structure is divided into three chambers along the vertical direction, the first filling honeycomb, the second filling honeycomb and the third filling honeycomb are respectively arranged in the chambers from top to bottom, and the strength of the first filling honeycomb, the strength of the second filling honeycomb and the strength of the third filling honeycomb are increased in a gradient manner;
the second flange plate is arranged at the lower end of the thin-wall conical structure and is fixed on the anti-collision longitudinal beam through bolts; the lower end of the thin-wall circular tube is fixedly connected with the upper end of the thin-wall conical structure through welding.
In a preferred embodiment: the internal filling honeycomb is a quadrilateral honeycomb.
In a preferred embodiment: the first filled cells are honeycomb structures having circular cells arranged at respective apexes of quadrangular cells.
In a preferred embodiment: the second filled cell is a honeycomb structure in which circular cells are arranged at the midpoints of four sides of a quadrangular cell.
In a preferred embodiment: the third filled cell is a honeycomb structure in which circular cells are arranged at the midpoints and respective vertices of four sides of a quadrangular cell.
Compared with the prior art, the technical scheme of the utility model possess following beneficial effect:
1. pedestrian protection function at low-speed collision.
The utility model provides a first box body is the thin wall pipe, adopts the better metal aluminum product of ductility, and inside traditional quadrangle honeycomb of filling to be provided with sinusoidal defect hole in the upper end, lower extreme half wavelength H department sets up the induction groove, and such setting makes first box body energy of absorption limited, but has reduced the peak power of collision by a wide margin, can be favorable to ensureing pedestrian and car interior passenger safety. Meanwhile, the sine defect hole and the half-wavelength H induction groove structure ensure the stability of the deformation initial stage, and a foundation is laid for continuous high-efficiency energy absorption of the second box body.
2. The energy absorption step by step, the collision stability is strong, and the safety of automobile passengers can be effectively ensured.
The utility model provides a traditional quadrangle honeycomb is filled to first box body, the inside novel honeycomb of three-layer that fills of second box body, these three kinds of novel honeycombs are respectively add circular unit in the corner of traditional quadrangle honeycomb, add circular unit and all add circular unit at turning and edge and obtain on the edge of traditional quadrangle honeycomb, because the position and the quantity that circular unit added are different for novel honeycomb intensity is different, and keeps increasing gradually, and the effect of energy-absorbing step by step can be realized to such design. Especially when high-speed collision happens, the energy absorption device can effectively ensure the continuity and stability of the energy absorption while improving the total energy absorption, and is very favorable for ensuring the safety of passengers in the vehicle.
3. The energy absorption capacity is high, and the energy absorption efficiency is effectively ensured.
The utility model provides a honeycomb material of the different cross sectional shape of three-layer of inside packing of second box body is novel honeycomb material, compare in traditional quadrangle honeycomb, because the addition of circular unit, the quantity of angle unit has been increased, and the folding deformation of angle unit is one of main energy-absorbing mode in the collision, consequently the energy-absorbing effect of this kind of novel honeycomb will obviously be superior to traditional honeycomb, in addition the carbon fiber sheet metal is added to the intermediate interlayer, constitute sandwich structure, the energy-absorbing capacity has further been guaranteed, such setting of arranging makes the total energy-absorbing capacity of second box body obviously improve, the energy-absorbing efficiency is high.
4. The multi-angle impact adaptability is high
The utility model discloses in related second box body is the toper design, and there is tapered one end in the bottom of energy-absorbing box, the opposite side of impact end promptly. The three honeycomb filling materials with gradually increased strength are matched, so that the mechanical instability phenomenon under angular impact can be effectively resisted, and the stability of the whole structure under multi-angle oblique impact is obviously improved.
5. The replaceable and high-adaptability electric heating furnace is suitable for mass production and manufacture.
The utility model relates to a primary action of first box body is for reducing peak force, reduces the injury of collision to pedestrian and passenger, absorbs the fractional energy simultaneously, and the effect is showing under the low-speed collision, can ensure pedestrian's safety. And the two ends are connected by bolts and spot welding, so that the device can be replaced after failure, is simple and convenient to operate, and is suitable for mass production.
Description of the drawings:
FIG. 1 is a schematic structural view of a novel energy absorption box of an automobile;
FIG. 2 is a top view of the crash box;
FIG. 3 is a cross-sectional view taken at A-A of FIG. 2;
FIG. 4 is a cross-sectional view of the first container;
FIG. 5 is a cross-sectional view of a first cassette filled with honeycombs;
FIG. 6 is a view showing the arrangement position of the induction groove in the first case;
FIG. 7 is a sectional view of the second container;
fig. 8-10 are cross-sectional views of a first filled cell, a second filled cell, and a third filled cell, respectively.
The specific implementation mode is as follows:
the description is further illustrated with reference to specific examples. It should be noted that: the following examples are only for illustrating the present invention and are not intended to limit the technical solutions of the present invention, and all technical solutions and modifications not departing from the scope of the present invention should be included in the scope of the claims of the present invention.
Referring to fig. 1-10, the present invention provides a novel energy absorption box device for a vehicle, which mainly comprises a first box body 1 and a second box body 2, which are connected by spot welding. The first box body 1 is composed of a first flange 3, a thin-wall circular tube 4 and an internal filling honeycomb 5. Wherein the upper end of the side wall of the thin-wall circular tube 4 is provided with a defect round hole which is arranged at the wave crest, the wave trough and the central axis of the sine curve, and the lower end of the side wall is provided with a trapping groove at the folding half-wavelength H. The first flange 3 is fixed on the anti-collision beam through bolt connection.
The magnitude of the half wavelength H can be obtained by the following equation. According to the theory of super-folding unit
Pm·2H·k＝σ0·T2π2r+2πσ0TH2 (1)
Wherein P ismRepresents the average stress in the crushing process of the thin-wall pipe, k is a constant, sigma0Representing the yield stress of the material, and r and T are the radius and thickness of the thin-walled circular tube. During the folding-crushing process, it is assumed that the folding units deform in an optimal crushing manner, i.e. with a minimum average crushing load, and therefore,
the size of H can be obtained by combining (1) and (2) and substituting the relevant numerical values.
The second box body 2 is of a thin-wall conical structure filled inside and consists of a thin-wall conical structure 6, a carbon fiber plate 7, a first filling honeycomb 8, a second filling honeycomb 9, a third filling honeycomb 10 and a flange plate 11. The upper end of the second box body 2 is connected with the lower end of the first box body 1 through spot welding, and the lower end of the second box body is connected with the anti-collision longitudinal beam through a second flange plate 11 bolt. The carbon fiber plate 7 is arranged in the thin-wall conical structure 6, the thin-wall conical structure 6 is divided into three chambers along the vertical direction, the first filling honeycomb 8, the second filling honeycomb 9 and the third filling honeycomb 10 are respectively arranged in the chambers from top to bottom, and the strength of the first filling honeycomb 8, the second filling honeycomb 9 and the third filling honeycomb 10 is increased in a gradient manner;
the utility model discloses in the thin wall pipe 4 among the involved first box body 1, the material is metallic aluminum, and the upper end is provided with sinusoidal defect hole. The defect hole can effectively reduce initial peak force while reducing the quality, and the induced groove mechanism at the half-wavelength H position of the lower end ensures the stability of crushing, so that the thin-wall circular tube 4 can be folded layer by layer to deform and absorb energy. The vertical processing greatly reduces the peak force at the early stage of collision and ensures the stability of deformation, thereby ensuring the safety of pedestrians and reducing the damage to passengers in the vehicle.
The utility model discloses in related second box body 2 for the toper mix the thin-walled tube structure of packing, this structure is filled three kinds of intensity and is gradient change's novel honeycomb material. The three new honeycomb structures are obtained by adding circular units into the conventional quadrilateral honeycomb. The first filled cells 8 are circular cells arranged at the vertices of the quadrilateral, wherein the second filled cells 9 are circular cells arranged at the midpoints of the four sides of the quadrilateral, and the third filled cells 10 are a combination of the two, with circular cells added at both the midpoints and vertices of the quadrilateral. Due to the addition of the circular units, the circular section has the best energy absorption effect in simple section shapes such as triangle, quadrangle and the like, so that the number of the section angle units is obviously increased, and the energy absorption in the collision process is mainly realized through the folding deformation of the angle units, so that the energy absorption effect of the novel honeycomb material is obviously improved. Secondly, because the position and the quantity that circular unit arranged are different for three kinds of novel honeycomb's energy-absorbing effect strengthens gradually, and such design can guarantee the efficient energy-absorbing that lasts in the collision process, and the cooperation toper bowl form structure 6 makes the box-packed putting of novel energy-absorbing more difficult unstability when the multi-angle is strikeed simultaneously. It should be noted that the flanges of the first box body 1 and the second box body 2 are fixed by three-point bolts, so that the stability of the anti-collision cross beam and the longitudinal beam can be enhanced, and the energy absorption box is ensured to be stressed uniformly, thereby stably crushing and absorbing energy.
The above, only be the preferred embodiment of the present invention, but the design concept of the present invention is not limited to this, and any skilled person familiar with the technical field is in the technical scope disclosed in the present invention, and it is right to utilize this concept to perform insubstantial changes to the present invention, all belong to the act of infringing the protection scope of the present invention.
Claims (5)
1. The utility model provides a novel car crash box structure which characterized in that includes: a first case and a second case;
the first box body consists of a first flange plate, a thin-wall circular tube and an internal filling honeycomb; the upper end of the thin-wall circular tube is fixedly connected with the flange plate, and the inner part of the thin-wall circular tube is filled with honeycombs and arranged in the thin-wall circular tube;
the upper end of the side wall of the thin-wall circular tube is provided with a defective circular hole, and the defective circular hole is arranged at the wave crest, the wave trough and the central axis of the sine curve; the lower end of the side wall of the thin-wall circular tube is provided with an induction groove, the wavelength of the thin-wall tube in one crushing folding is assumed to be 2H, and the induction groove is positioned at the half-wavelength H of the bending folding; the flange plate is fixed on the anti-collision beam through bolts;
the second box body consists of a thin-wall conical structure, a carbon fiber plate, a first filling honeycomb, a second filling honeycomb, a third filling honeycomb and a second flange plate; the carbon fiber plate is arranged in the thin-wall conical structure, the thin-wall conical structure is divided into three chambers along the vertical direction, the first filling honeycomb, the second filling honeycomb and the third filling honeycomb are respectively arranged in the chambers from top to bottom, and the strength of the first filling honeycomb, the strength of the second filling honeycomb and the strength of the third filling honeycomb are increased in a gradient manner;
the second flange plate is arranged at the lower end of the thin-wall conical structure and is fixed on the anti-collision longitudinal beam through bolts; the lower end of the thin-wall circular tube is fixedly connected with the upper end of the thin-wall conical structure through welding.
2. The novel automotive crash box structure of claim 1, wherein: the internal filling honeycomb is a quadrilateral honeycomb.
3. The novel automotive crash box structure of claim 1, wherein: the first filled cells are honeycomb structures having circular cells arranged at respective apexes of quadrangular cells.
4. The novel automotive crash box structure of claim 1, wherein: the second filled cell is a honeycomb structure in which circular cells are arranged at the midpoints of four sides of a quadrangular cell.
5. The novel automotive crash box structure of claim 1, wherein: the third filled cell is a honeycomb structure in which circular cells are arranged at the midpoints and respective vertices of four sides of a quadrangular cell.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2018214546664 | 2018-09-06 | ||
| CN201821454666 | 2018-09-06 |
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| CN209870310U true CN209870310U (en) | 2019-12-31 |
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| CN201822125343.7U Active CN209870310U (en) | 2018-09-06 | 2018-12-18 | Novel automobile energy absorption box structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532731A (en) * | 2018-09-06 | 2019-03-29 | 华侨大学 | A kind of novel car crass energy-absorption box |
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2018
- 2018-12-18 CN CN201822125343.7U patent/CN209870310U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109532731A (en) * | 2018-09-06 | 2019-03-29 | 华侨大学 | A kind of novel car crass energy-absorption box |
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