CN-224211139-U - Energy-absorbing longitudinal beam of automobile frame and automobile frame

CN224211139UCN 224211139 UCN224211139 UCN 224211139UCN-224211139-U

Abstract

The utility model provides an energy-absorbing longitudinal beam of an automobile frame and the automobile frame, wherein the energy-absorbing longitudinal beam of the automobile frame comprises a longitudinal beam main body, the cross section of the longitudinal beam main body is of a three-cavity composite structure, the composite structure comprises an outer stress beam positioned at the outer side of the frame, an inner stress beam positioned at the inner side of the frame and an energy-absorbing beam arranged between the outer stress beam and the inner stress beam, the cross section size of the energy-absorbing beam is smaller than that of the outer stress beam and the inner stress beam, so that a buffer cavity is formed by an upper gap between the outer stress beam and the energy-absorbing beam and a lower gap between the inner stress beam and the energy-absorbing beam, a plurality of energy-absorbing components are distributed in the energy-absorbing beam at intervals along the length direction of the frame, each energy-absorbing component comprises a honeycomb body and guide grooves arranged at two sides of the honeycomb body, the unit aperture of the honeycomb body is gradually increased from the head to the tail direction, and the overall energy-absorbing efficiency is improved.

Inventors

TU ZIWEN
LIU ZHIJIAN
DENG YINGYING
YANG WEI
ZHANG YINGLIN
CHEN MEIQING

Assignees

南昌江铃华翔汽车零部件有限公司

Dates

Publication Date: 20260508
Application Date: 20250519

Claims (8)

1. The utility model provides an energy-absorbing longeron of car frame, its characterized in that includes the longeron main part, its transversal three-chamber composite construction that personally submits of longeron main part, composite construction includes the outer atress roof beam that is located the frame outside, be located the inboard interior atress roof beam of frame, and set up in outer atress roof beam with the energy-absorbing roof beam between the interior atress roof beam, the cross-sectional dimension of energy-absorbing roof beam is less than outer atress roof beam with interior atress roof beam, so that outer atress roof beam with upper portion clearance between the energy-absorbing roof beam, and interior atress roof beam with the lower part clearance between the energy-absorbing roof beam forms the buffering cavity jointly, a plurality of energy-absorbing components are arranged along frame length direction interval in the energy-absorbing roof beam, the energy-absorbing component include the honeycomb body with set up in the guide way of honeycomb body both sides, wherein, the unit aperture of honeycomb body is the gradient from the locomotive to the tail direction, the notch direction of guide way and the longitudinal axis of frame become the contained angle.
2. The energy-absorbing longitudinal beam of an automobile frame according to claim 1, wherein the longitudinal beam main body comprises a middle part and connecting parts arranged at two ends of the middle part, the cross section of the middle part is arc-shaped, and a mounting area is arranged on one side, close to the frame, of the connecting parts.
3. The energy absorbing longitudinal beam of a vehicle frame according to claim 1, wherein the cross section of the outer load beam is arranged in a trapezoid, and the cross sections of the inner load beam and the energy absorbing beam are respectively arranged in a rectangle.
4. The energy absorbing longitudinal beam of an automotive frame of claim 1, wherein the honeycomb body comprises a front section honeycomb, a middle section honeycomb and a rear section honeycomb connected in sequence, the cell pore size of the front section honeycomb is smaller than that of the middle section honeycomb, and the cell pore size of the middle section honeycomb is smaller than that of the rear section honeycomb.
5. The energy absorbing stringer of a vehicle frame of claim 4, wherein the cell pore size of the front section honeycomb is 3-5mm, the wall thickness of the front section honeycomb is 0.8mm, the cell pore size of the middle section honeycomb is 6-8mm, the wall thickness of the middle section honeycomb is 0.6mm, the cell pore size of the rear section honeycomb is 9-12mm, and the wall thickness of the rear section honeycomb is 0.4mm.
6. The energy absorbing longitudinal beam of a vehicle frame according to claim 1, wherein a connecting cavity is formed between two adjacent energy absorbing components, an X-shaped energy conducting rib is arranged in the connecting cavity, and two ends of the energy conducting rib are respectively connected with the two adjacent energy absorbing components.
7. The energy absorbing rail of an automotive frame of claim 1, wherein the notch direction of the guide channel is oriented at an angle of 15 ° to 45 ° to the longitudinal axis of the frame.
8. An automotive frame comprising an energy absorbing rail of an automotive frame according to any one of claims 1-7.

Description

Energy-absorbing longitudinal beam of automobile frame and automobile frame Technical Field The utility model relates to the technical field of vehicle safety, in particular to an energy-absorbing longitudinal beam of an automobile frame and the automobile frame. Background In the field of passive safety of automobiles, a frame longitudinal beam is used as a key core component for absorbing collision energy, and the structural design of the frame longitudinal beam directly determines the shock resistance and the passenger safety guarantee capability of the vehicle. The main body of the vehicle body is a framework system formed by two longitudinal beams extending along the length direction of the vehicle and a plurality of cross beams connecting the two longitudinal beams, wherein the longitudinal beams are symmetrically distributed along the width direction of the vehicle body to form a rigid frame for supporting the load of the whole vehicle. The two longitudinal beams are not only main bearing bodies of the car body, but also bear double tasks in collision accidents. The longitudinal beam of the traditional single-cavity structure has certain limitation, mainly relies on a single crumple deformation mode to absorb energy, the energy absorption direction is limited to forward collision, and the dispersion capacity of side impact is relatively insufficient, so that the overall energy absorption effect is not ideal. Disclosure of utility model Based on this, the present utility model aims to provide an energy absorbing longitudinal beam of an automobile frame, so as to solve the above-mentioned problems in the background art. In one aspect, the utility model provides an energy-absorbing longitudinal beam of an automobile frame, which comprises a longitudinal beam main body, wherein the cross section of the longitudinal beam main body is of a three-cavity composite structure, the composite structure comprises an outer stress beam positioned at the outer side of the frame, an inner stress beam positioned at the inner side of the frame, and an energy-absorbing beam arranged between the outer stress beam and the inner stress beam, the cross section size of the energy-absorbing beam is smaller than that of the outer stress beam and the inner stress beam, so that an upper gap between the outer stress beam and the energy-absorbing beam and a lower gap between the inner stress beam and the energy-absorbing beam jointly form a buffer cavity, a plurality of energy-absorbing assemblies are arranged in the energy-absorbing beam at intervals along the length direction of the frame, each energy-absorbing assembly comprises a honeycomb body and guide grooves arranged at two sides of the honeycomb body, the unit aperture of the honeycomb body is gradually increased from the head to the tail direction, and the notch direction of each guide groove forms an included angle with the longitudinal axis of the frame. Compared with the prior art, the multi-directional collision energy absorption and dispersion device has the beneficial effects that the multi-directional collision energy absorption and dispersion device is realized through the synergistic effect of the hierarchical buffer mechanism of the three-cavity composite structure (the external stress beam, the buffer cavity and the internal stress beam) and the gradient honeycomb body. When the vehicle encounters side impact, the outer stress beam carries out first-layer buffering on impact force through the trapezoid cross-section structure of the outer stress beam, initial kinetic energy is weakened, then the buffering cavity further attenuates energy through deformation, direct transmission of peak impact force to the passenger cabin is reduced, and finally the inner stress beam carries out residual energy by means of the rectangular cross-section rigid supporting characteristic of the inner stress beam, so that an outer buffering-cavity energy consumption-inner supporting three-level protection system is formed. In a forward collision scene, the outer stress beam and the inner stress beam maintain the integral rigidity of the frame through high-strength materials, and the gradient honeycomb body in the energy-absorbing beam is collapsed step by step, so that the nonlinear attenuation of collision force is realized. The guide groove is designed with an inclined included angle, so that the lateral/inclined impact force is decomposed into longitudinal component force, and the energy conversion is realized through the axial collapse path of the honeycomb body, so that the energy absorption efficiency of non-forward collision is improved. It can be seen that the three-cavity composite structure breaks through the limitation of the energy absorption direction of the traditional single-cavity longitudinal beam through optimization of the force transmission path and design of functional partition, realizes omnidirectional protection of forward, lateral and oblique collision, impr