CN215706153U - Lightweight composite material automobile anti-collision beam assembly - Google Patents
Lightweight composite material automobile anti-collision beam assembly Download PDFInfo
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- CN215706153U CN215706153U CN202120779905.9U CN202120779905U CN215706153U CN 215706153 U CN215706153 U CN 215706153U CN 202120779905 U CN202120779905 U CN 202120779905U CN 215706153 U CN215706153 U CN 215706153U
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Abstract
A light composite material automobile anti-collision beam assembly comprises a beam and an energy absorption box, wherein the beam is formed by long glass fiber thermosetting composite material through mould pressing or injection molding, the middle part of the beam is an outward convex positive arc section, two ends of the beam are symmetrical inward convex reverse arc sections, the outward convex positive arc section and the inward convex reverse arc section are in smooth transition through a straight section, and the energy absorption box is connected with the straight section; the energy-absorbing box is PA + PBT combined material and moulds plastics integrative taking shape, and the energy-absorbing box includes energy-absorbing box body and mounting panel, is equipped with several energy-absorbing box internal rib boards in the energy-absorbing box body, and the energy-absorbing box internal rib board separates the energy-absorbing box body for a plurality of little cavitys, and the thickness of the internal rib board of energy-absorbing box is steadilyd decrease to top cross-sectional dimension by energy-absorbing box body bottom. The utility model conforms to the lightweight design concept, realizes the structure optimization design by using the process characteristics of the modified material on the premise of ensuring the performance requirement of the anti-collision beam assembly, improves the rigidity and the strength of the beam through the structure improvement, and improves the energy absorption effect of the energy absorption box through the structure with unequal thickness of the inner rib plates of the energy absorption box.
Description
Technical Field
The utility model relates to an automobile safety part, in particular to a light composite material automobile anti-collision beam assembly suitable for a small automobile.
Background
The weight reduction of the automobile becomes an important direction in the development of the automobile technology, and with the development of the automobile weight reduction technology, more and more automobile parts are required to be reduced in weight by a design schedule. At present, non-metal modified plastics are adopted at the positions of inner decorations, vehicle doors, front walls, seats and the like, and even the modified plastics are used on vehicle fuel tanks, bumpers and vehicle tail doors. By taking the front and rear anti-collision beams of the automobile as an example, compared with the traditional metal material, the front and rear anti-collision beams of the automobile made of the non-metal material have the advantages of light weight, high integration level, high design freedom, short production period, strong pedestrian protection capability and the like. When the automobile collides, the excellent anti-collision beam structure can effectively absorb impact energy, reduce the damage of a passenger cabin and an automobile body structure, reduce the injury degree of passengers and reduce the maintenance cost. The anti-collision beam is an important safety part of an automobile, and the bending resistance of the anti-collision beam is an important measurement index of the safety performance of the automobile when collision occurs. At present, with the improvement of materials, processing methods are continuously updated, more improvement spaces are brought to the structural design of the anti-collision beam, and on the premise of meeting the collision mechanical property of the anti-collision beam, the aim of developing a composite material anti-collision beam assembly meeting the light weight requirement by fully utilizing the material characteristics is the aim of the efforts of the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a lightweight composite material automobile anti-collision beam assembly, which fully utilizes the performance and processing characteristics of composite materials, and effectively improves the rigidity and strength of a beam and enables an energy absorption box to have higher energy absorption effect while conforming to lightweight design through the improved design of the structural shape.
The problem of the utility model is realized by the following technical scheme:
a lightweight composite material automobile anti-collision beam assembly comprises a beam and energy absorption boxes arranged on two sides of the beam, wherein the beam is made of long glass fiber thermosetting composite materials and is formed by a mould pressing or injection molding process, the middle part of the beam is an outward convex positive arc section, two ends of the beam are symmetrical inward convex reverse arc sections, the positive outward convex positive arc section and the inward convex reverse arc section are in smooth transition through a straight section, and the energy absorption boxes are connected with the straight section; the energy-absorbing box is PA + PBT combined material and moulds plastics integrative taking shape, and the energy-absorbing box includes energy-absorbing box body and mounting panel, is equipped with several energy-absorbing box internal rib boards in the energy-absorbing box body, and the energy-absorbing box internal rib board separates the energy-absorbing box body for a plurality of little cavitys, and the thickness of the internal rib board of energy-absorbing box is steadilyd decrease to top cross-sectional dimension by energy-absorbing box body bottom.
Above-mentioned lightweight combined material car anticollision roof beam assembly, the section of crossbeam outer wall is "concave" shape, and the opening face is towards the automobile body front portion, and the relative back wall slope of upper and lower lateral wall is equipped with the crossbeam main strengthening rib along length direction in the die cavity of crossbeam, sets up the die cavity strengthening rib of connecting crossbeam main strengthening rib and crossbeam outer wall in crossbeam main strengthening rib both sides, and the die cavity strengthening rib separates the crossbeam die cavity for a plurality of triangle-shaped regions.
According to the lightweight composite material automobile anti-collision beam assembly, the openings of the upper side wall and the lower side wall of the beam are provided with the flanges, and triangular side wall reinforcing ribs are distributed between the flanges and the side walls.
Above-mentioned lightweight combined material car anticollision roof beam assembly is equipped with the reinforced rib board between the box body lateral wall of energy-absorbing box and the mounting panel, and the reinforced rib board is triangle-shaped, and two reinforced rib boards of every lateral wall distribution of box body.
In the lightweight composite material automobile anti-collision beam assembly, the angle of the inclination angle a of the upper side wall and the lower side wall of the beam relative to the rear wall is 3-5 degrees.
Above-mentioned lightweight combined material car anticollision roof beam assembly, the pre-buried coupling nut in energy-absorbing box body top, the straight section die cavity department of crossbeam is equipped with the mounting groove of rectangle, and coupling bolt passes mounting groove and nut threaded connection.
According to the lightweight composite material automobile anti-collision beam assembly, the length of the outer convex positive arc section of the cross beam is 50% -55% of the total length of the cross beam, and the length of the inner convex negative arc section of the cross beam is 10% -15% of the total length of the cross beam.
According to the lightweight composite material automobile anti-collision beam assembly, the inner rib plates of the energy absorption box are distributed in a shape like a Chinese character 'tian', in a multi-lattice or in a honeycomb manner in the energy absorption box body.
According to the lightweight composite material automobile anti-collision beam assembly, the cross-sectional area of the bottom of the rib plate in the energy absorption box is 1.3-1.5 times that of the top.
Above-mentioned lightweight combined material car anticollision roof beam assembly, limit portion round angle department of energy-absorbing box body sets up the shrinkage cavity of bursting.
Compared with the prior art, the anti-collision beam assembly provided by the utility model comprises the cross beam and the energy absorption box, and has the following main advantages that: 1. the beam is made of long glass fiber thermosetting composite materials, and is integrally of a shape structure with a middle part being in a positive arc and two ends being in a reverse arc, and the positive arc and the reverse arc are in smooth transition from a straight section. The structure is beneficial to improving the bending resistance of the cross beam, is also beneficial to the reliable installation of the energy absorption box, and is also beneficial to the passing of new collision laws and regulations. 2. The upper side wall and the lower side wall of the cross beam form an included angle of 3-5 degrees with the vertical direction, so that the middle reinforcing rib can play a role when the front collision deformation occurs, and the demoulding in the processing process is facilitated. 3. The beam main reinforcing ribs along the length direction are arranged in the cavity of the concave section of the beam, triangular cavity reinforcing ribs are distributed on two sides of each reinforcing rib, and the structure can improve the overall rigidity of the beam. 4. The upper side wall and the lower side wall of the beam are provided with flanges, triangular side wall reinforcing ribs are distributed between the side walls of the flanges, a local reinforcing effect is achieved, and the deformation in relevant collision laws and regulations is obviously reduced. 4. The energy absorption box is made of PA + PBT composite materials with high elongation rate and integrally formed by injection molding, and the energy absorption box is provided with the inner rib plates with different thicknesses, so that the material distribution is reasonable, and the step-by-step crumpling and energy absorption are facilitated. 5. A reinforcing rib plate is arranged between the energy absorption box body and the mounting plate, so that the connection strength and rigidity of the energy absorption box and the cross beam are improved.
Drawings
The utility model will be further explained with reference to the drawings.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a cross beam;
FIG. 3 is a schematic view of a cross-beam outer wall cross-section;
FIG. 4 is a schematic structural view of the crash box;
FIG. 5 is a cross-sectional schematic view of the crash box;
FIGS. 6-8 are schematic views of three distributions of webs in an energy absorption box.
The list of labels in the figure is: 1. the energy-absorbing box comprises a beam, 1-1 part of a beam, an outward convex positive arc section, 1-2 parts of an inward convex reverse arc section, 1-3 parts of a straight section, 1-4 parts of a beam main reinforcing rib, 1-5 parts of a cavity reinforcing rib, 1-6 parts of a side wall reinforcing rib, 1-7 parts of a mounting groove, 1-8 parts of a flange, 2 parts of an energy-absorbing box, 2-1 parts of an energy-absorbing box body, 2-1 parts of a crumpling groove, 2-2 parts of a connecting plate, 2-3 parts of a crumpling hole, 2-4 parts of a reinforcing rib plate, 2-5 parts of a rib plate, 2-6 parts of a connecting nut in the energy-absorbing box.
Detailed Description
Referring to fig. 1-3, the impact beam assembly of the present invention includes a beam 1 and energy absorption boxes 2 mounted on both sides of the beam, wherein the upper, lower, front and rear directions are indicated according to the using state of the impact beam assembly. The beam is made of long glass fiber thermosetting composite materials, and is formed through a mould pressing or injection molding process, the materials have high rigidity, strength and plasticity, the material density is low, the light weight effect is good, and the manufacturability is good. The utility model is beneficial to the characteristic of easy forming of materials, and carries out improved design on the geometric shape of the beam, wherein the middle part of the beam is an outward convex positive arc section 1-1, the two ends of the beam are symmetrical inward convex reverse arc sections 1-2, the outward convex positive arc section and the inward convex reverse arc section are in smooth transition by a straight section 1-3, and the energy absorption box is connected with the straight section. The length of the outward convex positive arc section of the cross beam is 50-55% of the total length of the cross beam, and the length (single side) of the inward convex negative arc section of the cross beam is 10-15% of the total length of the cross beam. According to the structure, the convex positive arc section can improve the capability of the beam for bearing the front impact resistance; the straight section is convenient for reliable connection with the energy absorption box; when collision occurs, the contact area between the cross beam and the barrier can be increased by the two sections of inward convex reverse arc sections, and the acting force transmitted to the vehicle body is reduced, so that the damage to people in the vehicle is reduced, and the collision performance of the vehicle is improved. Tests show that new collision laws and regulations are easy to pass after the inward convex reverse arc section is arranged. The cross section of the outer wall of the cross beam is concave, the opening surface faces the front part of the vehicle body, the opening parts of the upper side wall and the lower side wall of the cross beam are provided with flanges 1-8, and the flange structure can improve the strength of the front edge of the cross beam; triangular side wall reinforcing ribs 1-6 are distributed between the flanging and the side wall. The side wall reinforcing ribs can locally enhance the strength of the flanging position, and play a role in local reinforcement. The structure of the flanging and the side wall reinforcing ribs can obviously reduce the deformation amount in relevant collision laws and regulations. The cross beam comprises a cross beam body and is characterized in that cross beam main reinforcing ribs 1-4 along the length direction of the cross beam are arranged in a cavity of the cross beam body, cavity reinforcing ribs 1-5 for connecting the cross beam main reinforcing ribs with the outer wall of the cross beam are arranged on two sides of the cross beam main reinforcing ribs, and the cross beam cavity is divided into a plurality of triangular areas with good stability by the cavity reinforcing ribs. The main reinforcing ribs of the cross beam and the cavity reinforcing ribs play a role in improving the strength of the cross beam together. The upper and lower side walls of the beam are arranged obliquely relative to the rear wall, and the angle of the inclination angle a is 3-5 degrees. The structure can fully utilize the reinforcing effect of the reinforcing ribs to reduce the deformation of the cross beam during collision, and is favorable for a forming and demolding process.
Referring to fig. 1 and 4-8, the crash box 2 is injection molded as one piece from a PA + PBT composite material having an elongation of 300%. The energy absorption box comprises an energy absorption box body 2-1 and a mounting plate 2-2. The top cover is arranged at the top of the box body of the energy absorption box. The connecting nuts 2-6 are placed in the energy absorption box as embedded parts in the injection molding process, so that the connecting nuts are firmly embedded in the box body of the energy absorption box. The position of embedding the connecting nut is locally thickened to improve the connecting strength. Rectangular mounting grooves 1-7 are formed in the straight section cavity of the beam, and when the energy absorption box is connected with the beam, the connecting bolt penetrates through the mounting grooves and is in threaded locking with the connecting nut. The inner rib plates of the energy absorption box are 2-5, the inner rib plates of the energy absorption box divide the interior of the energy absorption box into a plurality of small cavities, the thickness of the inner rib plates of the energy absorption box is gradually reduced from the bottom to the top of the box body of the energy absorption box, and the cross-sectional area of the bottom of the inner rib plates of the energy absorption box is 1.3-1.5 times of that of the top. The variable cross-section design of the rib plates in the energy absorption box is beneficial to realizing gradual collapse of the energy absorption box, improves the energy absorption effect, meets the structural requirement of the forming process, and is beneficial to forming and die design. As shown in figures 6-8, the inner rib plates of the energy absorption box are distributed in a shape like Chinese character 'tian' (figure 6), multi-grid distribution (figure 7) or honeycomb distribution (figure 8) in the box body of the energy absorption box. The more compact the distribution of the rib plates in the energy absorption box is, the more favorable the energy absorption capacity is improved, and the more favorable the uniform distribution of the absorption energy is. Be equipped with the bolt hole on the mounting panel, the mounting panel is used for crashproof roof beam assembly and vehicle connection. And collapse holes 2-3 for guiding collapse are arranged at the edge round corners of the box body of the energy absorption box. And reinforcing rib plates 2-4 are arranged between the side wall of the box body of the energy absorption box and the mounting plate, the reinforcing rib plates are triangular, and two reinforcing rib plates are distributed on each side wall of the box body. The reinforcing rib plate can improve the connection strength of the mounting plate and the energy absorption box body.
The utility model conforms to the lightweight design concept, realizes the structure optimization design by using the process characteristics of the modified material on the premise of ensuring the performance requirement of the anti-collision beam assembly, improves the rigidity and the strength of the beam through the structure improvement, and improves the energy absorption effect of the energy absorption box through the structure with unequal thickness of the inner rib plates of the energy absorption box.
Claims (10)
1. The utility model provides a lightweight combined material car anticollision roof beam assembly, includes the crossbeam and installs the energy-absorbing box in crossbeam both sides, its characterized in that: the beam is made of long glass fiber thermosetting composite materials and is formed through a die pressing or injection molding process, the middle part of the beam is an outward convex positive arc section, two ends of the beam are symmetrical inward convex reverse arc sections, the outward positive arc section and the inward convex reverse arc section are in smooth transition through a straight section, and the energy absorption box is connected with the straight section; the energy-absorbing box is PA + PBT combined material and moulds plastics integrative taking shape, and the energy-absorbing box includes energy-absorbing box body and mounting panel, is equipped with several energy-absorbing box internal rib boards in the energy-absorbing box body, and the energy-absorbing box internal rib board separates the energy-absorbing box body for a plurality of little cavitys, and the thickness of the internal rib board of energy-absorbing box is steadilyd decrease to top cross-sectional dimension by energy-absorbing box body bottom.
2. The lightweight composite automotive impact beam assembly of claim 1, wherein: the cross beam is characterized in that the cross beam outer wall is concave, the opening face faces the front portion of the vehicle body, the upper side wall and the lower side wall are inclined relative to the rear wall, a cross beam main reinforcing rib along the length direction is arranged in a cavity of the cross beam, cavity reinforcing ribs for connecting the cross beam main reinforcing rib and the cross beam outer wall are arranged on two sides of the cross beam main reinforcing rib, and the cavity reinforcing rib divides the cross beam cavity into a plurality of triangular areas.
3. The lightweight composite automotive impact beam assembly of claim 2, wherein: the opening parts of the upper side wall and the lower side wall of the beam are provided with flanges, and triangular side wall reinforcing ribs are distributed between the flanges and the side walls.
4. The lightweight composite automotive impact beam assembly of claim 3, wherein: and a reinforcing rib plate is arranged between the side wall of the energy absorption box and the mounting plate, the reinforcing rib plate is triangular, and two reinforcing rib plates are distributed on each side wall of the box body.
5. The lightweight composite automotive impact beam assembly of claim 4, wherein: the angle of the inclination angle a of the upper and lower side walls of the cross beam relative to the rear wall is 3-5 deg.
6. The lightweight composite automotive impact beam assembly of claim 5, wherein: connecting nuts are embedded in the top of the energy absorption box body, rectangular mounting grooves are formed in straight section cavities of the cross beam, and the connecting bolts penetrate through the mounting grooves and are in threaded connection with the nuts.
7. The lightweight composite automotive impact beam assembly of claim 6, wherein: the length of the outward convex positive arc section of the cross beam is 50-55% of the total length of the cross beam, and the length of the inward convex negative arc section of the cross beam is 10-15% of the total length of the cross beam.
8. The lightweight composite automotive impact beam assembly of claim 7, wherein: the inner rib plates of the energy absorption box are distributed in a shape like Chinese character 'tian', multi-grid or honeycomb in the box body of the energy absorption box.
9. The lightweight composite automotive impact beam assembly of claim 8, wherein: the cross-sectional area of the bottom of the rib plate in the energy absorption box is 1.3-1.5 times of that of the top.
10. The lightweight composite automotive impact beam assembly of claim 9, wherein: and the round corners of the side parts of the box body of the energy absorption box are provided with collapse holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120779905.9U CN215706153U (en) | 2021-04-16 | 2021-04-16 | Lightweight composite material automobile anti-collision beam assembly |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120779905.9U CN215706153U (en) | 2021-04-16 | 2021-04-16 | Lightweight composite material automobile anti-collision beam assembly |
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| CN215706153U true CN215706153U (en) | 2022-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781189A (en) * | 2022-12-01 | 2023-03-14 | 河南科技大学 | Machining method for automobile anti-collision beam |
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2021
- 2021-04-16 CN CN202120779905.9U patent/CN215706153U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115781189A (en) * | 2022-12-01 | 2023-03-14 | 河南科技大学 | Machining method for automobile anti-collision beam |
| CN115781189B (en) * | 2022-12-01 | 2024-05-21 | 河南科技大学 | Processing method for automobile anti-collision beam |
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