CN211869513U - Two-stage crushing front longitudinal beam structure and automobile - Google Patents

Abstract

The utility model relates to the technical field of automobile front longitudinal beams, in particular to a two-stage crushing front longitudinal beam structure, which comprises a front longitudinal beam inner plate and a front longitudinal beam outer plate; the front longitudinal beam inner plate comprises an inner plate front section and an inner plate rear section, the inner plate front section and the corresponding front longitudinal beam outer plate are respectively provided with a first crumple guide groove, and one side of the inner plate rear section close to the inner plate front section is provided with a second crumple guide groove; the strength of the inner plate rear section is stronger than that of the inner plate front section. According to the inner plate, the strength of the rear plate section is stronger than that of the front plate section, and the first crumple guide groove and the second crumple guide groove are respectively arranged on the front plate section and the rear plate section; because the intensity of the front section is weaker than that of the rear section, when the front collision force is larger, the front longitudinal beam collapses and absorbs energy under the action of the first collapsing guide groove and then collapses and absorbs energy under the action of the second collapsing guide groove, so that the condition that the middle section of the front longitudinal beam is bent is avoided, and the condition that the engine cabin is extruded due to bending deformation to influence the operation of an engine is avoided as much as possible.

Description

Two-stage crushing front longitudinal beam structure and automobile

Technical Field

The utility model relates to a longeron technical field before the car, concretely relates to longeron structure and car before two-stage conquassation.

Background

The front longitudinal beams of the automobile are positioned at two sides below the engine and are equivalent to the framework of the automobile. The front longitudinal beam is generally formed by stamping low-alloy steel plates, the end face of the front longitudinal beam is in a groove shape or an I shape, the front of the front longitudinal beam of the vehicle belongs to an energy absorption area, the front longitudinal beam can collapse once collision occurs, and collision energy is absorbed through crushing deformation and bending deformation.

As shown in fig. 1, the existing front longitudinal beam structure absorbs energy by adopting a mode of crushing the front section and bending the rear section, and if the energy of collision is large, the absorption efficiency of energy absorption by bending deformation is not high; in order to ensure that the middle section of the front longitudinal beam is deformed on the rear section of the front longitudinal beam after the front section is crushed, a reinforcing plate 4 is added, so that the weight of the front longitudinal beam is increased, and the cost is increased. The existing front longitudinal beam inner plate 1 is an integral body, and due to the fact that materials are consistent, the front section of the front longitudinal beam inner plate is not collapsed and deformed, and the rear section of the front longitudinal beam inner plate is bent and deformed, so that an engine cabin is extruded possibly, and operation is affected.

Disclosure of Invention

The utility model discloses the mode to the crumple energy-absorbing of present front longitudinal anterior beam anterior segment, the rear end deformation energy-absorbing of bending leads to collision energy overall absorption efficiency not high, probably extrudees the engine cabin, influences the operation, and current front longitudinal beam is equipped with the problem that also increased the cost when the reinforcing plate has increased weight, provides a two-stage conquassation front longitudinal beam structure.

In order to achieve the above purpose, the invention provides the following technical scheme:

on one hand, the application provides a two-stage crushing front longitudinal beam structure, which comprises a front longitudinal beam inner plate and a front longitudinal beam outer plate; the front longitudinal beam inner plate and the front longitudinal beam outer plate are buckled to form a cavity; the front longitudinal beam inner plate comprises an inner plate front section and an inner plate rear section, and the inner plate front section is welded with the inner plate rear section; a first crumple guide groove is formed in the front section of the inner plate, a first crumple guide groove is also formed in the part, corresponding to the front section of the inner plate, of the outer plate of the front longitudinal beam, and a second crumple guide groove is formed in one end, close to the front section of the inner plate, of the rear section of the inner plate; the strength of the inner plate rear section is stronger than that of the inner plate front section.

Preferably, the first crumple guide groove is arranged along the height direction of the front longitudinal beam, and the second crumple guide groove is arranged along the height direction of the front longitudinal beam. The first and second crush-guide channels are vertical with respect to the ground, so that the front longitudinal beam compresses section by section under stress, just like a compression duct.

Preferably, an avoidance groove is formed in the front side member outer plate relative to the second crumple guide groove. The second crumple guide groove is arranged at the position opposite to the avoidance groove, so that the avoidance groove plays a role in avoiding the shock absorber, and the avoidance groove also plays a role in crumpling.

Preferably, the rear section of the inner plate is provided with three second collapse guide grooves, and the groove width of each second collapse guide groove is 20-30 cm. Because the whole length of the front longitudinal beam is unchanged, the rear section of the inner plate is provided with three second crumple guide grooves, and the width of each second crumple guide groove is 20-30cm, so that the crumple effect is the best in the process of secondary crumple.

Preferably, the inner plate back end is connected with the back fagging, the back fagging is located behind the second ulcerate guiding groove that contracts. Compared with the rear supporting plate in the prior art, the rear supporting plate has the advantages that the connecting length of the rear section of the longitudinal beam is reduced, so that a secondary crumple space is reserved, the rear supporting plate can guarantee the structural integrity of the front longitudinal beam in the collision process, and the passenger compartment is prevented from being excessively deformed.

On the other hand, the application also provides an automobile comprising the two-stage crushing front longitudinal beam structure.

Compared with the prior art, the invention has the beneficial effects that: the front longitudinal beam inner plate is divided into an inner plate front section and an inner plate rear section, the strength of the inner plate rear section is stronger than that of the inner plate front section, and a first crumple guide groove and a second crumple guide groove are respectively arranged on the inner plate front section and the inner plate rear section; because the intensity of the front section is weaker than that of the rear section, when the front collision force is larger, the front longitudinal beam collapses and absorbs energy under the action of the first collapse guiding groove, and then collapses and absorbs energy under the action of the second collapse guiding groove, so that the condition that the middle section of the front longitudinal beam is bent is avoided as much as possible, and the condition that the engine cabin is extruded due to bending deformation to influence the operation of the engine is avoided as much as possible. The design through this application has reduced the reinforcing plate for on the basis that does not change front longitudinal strength, alleviateed front longitudinal's weight, practiced thrift the material, the cost is reduced.

Description of the drawings:

FIG. 1 is a schematic structural view of a front side rail of the prior art;

fig. 2 is a schematic structural view of a two-stage crushing front longitudinal beam structure provided by the present application;

FIG. 3 is a top view of FIG. 2;

fig. 4 is a schematic installation diagram of a two-stage crushing front longitudinal beam structure provided by the present application.

The labels in the figure are: 1-front longitudinal beam inner plate, 10-bending guide groove, 11-inner plate front section, 12-inner plate rear section, 13-first collapse guide groove, 14-second collapse guide groove, 15-avoidance groove, 2-front longitudinal beam outer plate, 3-rear support plate and 4-reinforcing plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "front", "back", "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

As shown in fig. 2 and 3, the present application provides a two-stage crushing front side member structure, which includes a front side member inner panel 1 and a front side member outer panel 2; the front longitudinal beam inner plate 1 and the front longitudinal beam outer plate 2 are buckled to form a cavity; the front longitudinal beam inner plate 1 comprises an inner plate front section 11 and an inner plate rear section 12, and the inner plate front section 11 is welded with the inner plate rear section 12; the front side member outer panel 2 is an integral body. The strength of the inner plate rear section 12 is stronger than that of the inner plate front section 11, the inner plate front section 11 and the inner plate rear section 12 provided by the application are made of different materials, for example, the inner plate front section 11 can be made of HC340 cold rolled steel, and the thickness is 1.8 mm; the inner panel back section 12 may be made of HC420LA high strength cold rolled steel having a thickness of 2 mm. The strength of the inner panel rear section 12 is stronger than that of the inner panel front section 11, thereby preventing the inner panel rear section 12 from being crushed prior to the inner panel front section 11 in a collision.

The inner plate front section 11 and the corresponding front longitudinal beam outer plate 2 are both provided with a first crumple guide groove 13, and one side of the inner plate rear section 12 close to the inner plate front section 11 is provided with a second crumple guide groove 14. The first crush guide 13 is the same as the prior art crush guide. The first and second crush- guide grooves 13 and 14 may be arc-shaped or square-shaped. The front longitudinal beam outer plate 2 is provided with the avoidance groove 15, in order to better play a role in guiding crumpling, the second crumpling guide groove 14 is arranged on the front longitudinal beam inner plate opposite to the avoidance groove 15, three second crumpling guide grooves 14 are arranged, and the crumpling guide effect is best when the groove width of each second crumpling guide groove 14 is 20-30 cm. By adjusting the number of second crush slots 14 and the depth of each second crush slot 14, the time to second level crush can be adjusted. The first crush guide groove 13 and the second crush guide groove 14 are both arranged along the height direction of the front side member, and the direction of the first crush guide groove 13 and the direction of the second crush guide groove 14 are equivalent to the direction perpendicular to the ground, the first crush guide groove 13 on the front side member outer plate 2 is concave relative to the front side member inner plate 1, and the first crush guide groove 13 on the front side member inner plate 1 is concave relative to the direction of the front side member outer plate 2. The second crush guide groove 14 in the inner panel rear section 12 is recessed with respect to the front side member outer panel 2. The inner plate rear section 12 is connected with a rear supporting plate 3, and the front section of the rear supporting plate 3 is positioned behind the second crumpling guide groove 14.

As shown in fig. 1, the front part of the front longitudinal beam of the prior art is provided with a first crumple guide groove 13, and the rear part is provided with a bending guide groove 10, so that when the collision energy is low, the front longitudinal beam absorbs the energy through the axial crumple of the first crumple guide groove 13; when the collision energy is large, the collapse of the first collapse guiding groove 13 is completed, and the middle section of the front longitudinal beam starts to be bent through the bending guiding groove 10. The reinforcing plate 4 is additionally arranged at the rear end of the bending guide groove 10, under the combined action of the bending guide groove 10 and the reinforcing plate 4, the bending guide groove part in the middle section of the longitudinal beam is firstly bent outwards, and the reinforcing plate 4 is then bent inwards. And the outward bending amplitude of the bending guide groove 10 is larger than the inward bending amplitude of the reinforcing plate 4. Because the rear end of the front longitudinal beam absorbs energy through bending deformation, the total energy absorption efficiency is not high. Present front longitudinal inner panel 1 thickness adopts a material integrated into one piece, leads to probably not appearing collapsing deformation in the front end under great exogenic action and just being bent earlier in the rear end, and the thickness of present front longitudinal inner panel 1 is 2.0mm, thereby because the thickness of this application has increased the reinforcing plate again and has made the weight of front longitudinal heavier, and the lightweight effect is not good.

Compared with the front longitudinal structure of prior art, the two-stage crushing front longitudinal structure that this application provided, front longitudinal inner panel 1 that this application provided has divided into inner panel anterior segment 11 and inner panel back end 12 two parts, and inner panel anterior segment 11 and inner panel back end 12 welding, the position of welded position and current guiding groove 10 department of bending is unanimous, be equipped with the guiding groove 14 that contracts is burst to the second on inner panel back end 12, be located the guiding groove 14 back that contracts is burst to the second with the hookup location of back fagging 3 and inner panel back end 12, this application is not using the reinforcing plate, and inner panel anterior segment 11's weight has also alleviateed, so the two-stage crushing front longitudinal structure quality that this application provided is lighter.

On the other hand, the application also provides an automobile comprising the two-stage crushing front longitudinal beam structure.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (6)

1. A two-stage crushing front longitudinal beam structure is characterized by comprising a front longitudinal beam inner plate (1) and a front longitudinal beam outer plate (2); the front longitudinal beam inner plate (1) and the front longitudinal beam outer plate (2) are buckled to form a cavity; the front longitudinal beam inner plate (1) comprises an inner plate front section (11) and an inner plate rear section (12), and the inner plate front section (11) is welded with the inner plate rear section (12); a first crumple guide groove (13) is formed in the inner plate front section (11), a first crumple guide groove (13) is also formed in a part, corresponding to the inner plate front section (11), of the front longitudinal beam outer plate (2), and a second crumple guide groove (14) is formed in one end, close to the inner plate front section (11), of the inner plate rear section (12); the strength of the inner plate rear section (12) is stronger than that of the inner plate front section (11).

2. A two-stage crushing front side member structure according to claim 1, wherein the first crush guide groove (13) is provided in a height direction of the front side member; the second collapse guiding grooves (14) are arranged along the height direction of the front longitudinal beam.

3. A two-stage crush front rail structure according to claim 1, wherein an avoidance groove (15) is provided at the front rail outer panel (2) with respect to the second crush guide groove (14).

4. A two-stage crush front side member structure according to claim 2, wherein the inner panel rear section (12) is provided with three second crush guide grooves (14), and the groove width of the second crush guide grooves (14) is 20 to 30 cm.

5. A two-stage crush front rail structure according to claim 1, wherein a rear stay (3) is attached to the inner panel rear section (12), and the rear stay (3) is located behind the second crush guide groove (14).

6. An automobile comprising a two-stage crush front rail structure according to any one of claims 1 to 5.

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