Front vehicle-body structure of vehicle

By incorporating connectors, inner flaps, and reinforcing ribs in the front body structure of the vehicle, the deformation of the longitudinal beams is guided, thus resolving the issue of localized hard spots caused by direct fixation of the subframe. This achieves safer collision energy absorption and force mitigation, thereby improving the vehicle's collision safety performance.

CN223878076UActive Publication Date: 2026-02-06BEIJING AUTOMOBILE WORKS CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202520583133.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-31
Publication Date
2026-02-06
Estimated Expiration
2035-03-31

AI Technical Summary

Technical Problem

In the existing technology, the subframe is directly fixed to the longitudinal beam, which causes local hard spots to form at the front of the longitudinal beam, affecting the transmission of collision force. It cannot achieve the ideal front-to-rear crumple energy absorption mode and does not have the ability to deform and absorb energy.

Method used

By setting connectors, inner flaps and reinforcing ribs, the connectors are guided to deform, and in conjunction with the crumple grooves and crumple holes, they participate in collision energy absorption. Crumple grooves are set on the longitudinal beams to improve structural strength, and in conjunction with the energy absorption box, they absorb energy during the initial crumple phase, avoiding direct transmission of impact force to the cockpit.

Benefits of technology

It improves the vehicle's collision safety performance by reducing the transmission of impact force into the passenger compartment through the deformation of the connectors and the guidance of the crumple zone, enhancing the support strength and energy absorption capacity of the longitudinal beams, and achieving a safer collision energy absorption effect.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223878076U_ABST
    Figure CN223878076U_ABST
Patent Text Reader

Abstract

The utility model discloses a front vehicle body structure of a vehicle, and belongs to the technical field of automobile manufacturing. A first mounting hole is fixedly formed in the auxiliary frame, a mounting plate is fixedly connected to the top end of the front portion of the auxiliary frame, a second mounting hole is fixedly formed in the mounting plate, a connecting piece is fixedly connected to the mounting plate, a longitudinal beam is fixedly connected to the connecting piece, and a longitudinal beam cover plate is fixedly connected to the outer side wall of the longitudinal beam. A clamping ring is fixedly connected to the bottom end of the rear portion of the auxiliary frame, a fourth mounting hole is fixedly formed in the clamping ring and fixedly connected with the longitudinal beam through a bolt, and the two sides of the clamping ring extend downwards to form second flanges. The supporting strength of the connecting piece to the longitudinal beam is improved by arranging the inner turning plates and the first reinforcing ribs, and the connecting piece is guided to deform and participate in collision energy absorption by arranging the second crumple grooves, the first crumple grooves and the crumple holes. The impact force crumple energy absorption device is mainly used for crumple energy absorption of impact force.
Need to check novelty before this filing date? Find Prior Art

Description

TECHNICAL FIELD

[0001] The utility model belongs to the automobile manufacturing technical field, specifically, especially relate to a front body structure of vehicle. BACKGROUND

[0002] The longitudinal beam and the auxiliary frame of the front part of the vehicle are the key energy absorption and collision force transmission structure in the collision process, and play an important role in the passive safety performance of the automobile. In the collision process, the front longitudinal beam and the auxiliary frame are the overall energy absorption structure, which not only absorbs a large amount of energy in the collision process, buffers the collision strength and stably transmits the collision energy to the A-pillar, the door sill and other secondary force transmission and energy absorption structures, but also simultaneously affects the acceleration waveform response of the whole vehicle and transmits the response to the ECU to determine whether the airbag should be detonated. At present, the front mounting structure of the auxiliary frame is mainly directly screwed to the longitudinal beam, which obviously strengthens the local collision stiffness of the longitudinal beam, forms a local hard point, causes the deformation of the middle section of the longitudinal beam to fail to achieve the ideal step-by-step collapse energy absorption mode, and in addition, the structure itself does not have the deformation energy absorption capacity, which wastes the deformation energy absorption space of the key force transmission channel. SUMMARY

[0003] The utility model wants to solve the technical problem of overcoming the prior art, providing a front body structure of vehicle, which improves the support strength of the connecting piece to the longitudinal beam by setting the inner turning plate and the reinforcing rib one, guides the deformation of the connecting piece by setting the collapse groove two, the collapse groove one and the collapse hole, and participates in the collision energy absorption.

[0004] The front body structure of vehicle, including auxiliary frame, fixedly provided with mounting hole one on the auxiliary frame, the top end of the front part of the auxiliary frame is fixedly connected with the mounting plate, the mounting plate is fixedly provided with mounting hole two, the mounting plate is fixedly connected with the connecting piece, the connecting piece is fixedly connected with the longitudinal beam, the outer sidewall of the longitudinal beam is fixedly connected with the longitudinal beam cover plate, the bottom end of the rear part of the auxiliary frame is fixedly connected with the snap ring, the mounting hole four is fixedly provided on the snap ring, and the mounting hole four is fixedly connected with the longitudinal beam through bolts, and the flange two is extended downward on both sides of the snap ring.

[0005] Preferably, the connecting piece includes a bottom plate, the bottom plate is fixedly provided with mounting hole three, the mounting hole three is fixedly connected with the mounting hole two through bolts, the top of the bottom plate is fixedly connected with the top pressing plate, the side of the top pressing plate is fixedly connected with the inner turning plate, the top of the top pressing plate is fixedly connected with the outer turning plate, the bottom of the bottom plate is fixedly connected with the abutting plate, the abutting plate is fixedly provided with reinforcing rib one, the outer end sidewall of the bottom plate is fixedly connected with the outer clamping plate, and the inner end sidewall of the bottom plate is fixedly connected with the inner clamping plate.

[0006] Preferably, the top pressing plate is fixedly provided with the collapse groove two, and the inner clamping plate is fixedly provided with the collapse groove one and the collapse hole.

[0007] Preferably, the front end of the longitudinal beam is fixed with an energy absorption box mounting hole, the top of the longitudinal beam is fixed with a boss, the boss is fixed with a vacuum booster motor mounting hole, the rear side wall of the longitudinal beam is fixed with a weight reduction hole, the rear bottom wall of the longitudinal beam is fixed with an opening, the rear end of the longitudinal beam is fixed with a rocker beam mounting hole, and the outer wall of the longitudinal beam extends in the vertical direction and is provided with a flange one.

[0008] Preferably, the front end of the longitudinal beam cover plate extends outward and is provided with a flange one, the front part of the longitudinal beam cover plate is fixed with a collapse groove three, the rear part of the collapse groove three is fixed with a reinforcing rib two, the upper part of the reinforcing rib two is fixed with a reinforcing plate avoiding groove, the middle part of the longitudinal beam cover plate is fixed with a plurality of wire harness mounting holes, and the rear end of the longitudinal beam cover plate extends outward and is provided with a flange two.

[0009] Compared with the prior art, the utility model has the advantages that:

[0010] 1. By setting the connecting piece, the local hard point of the longitudinal beam is avoided, the force transmission channel of the impact force is affected, the connecting piece can be deformed when the collision accident occurs, the energy absorption space of the longitudinal beam is released, and the collision safety performance of the vehicle is improved.

[0011] 2. The supporting strength of the connecting piece to the longitudinal beam is improved by setting the inward turning plate and the reinforcing rib one, the deformation of the connecting piece is guided by setting the collapse groove two, the collapse groove one and the collapse hole, and the connecting piece participates in the collision energy absorption.

[0012] 3. The structure strength of the longitudinal beam cover plate is improved by setting the reinforcing rib two, the collapse groove three is vertically arranged, the energy absorption box can be collapsed and absorbed energy at the initial stage of the collision, the impact force is not directly transmitted to the cockpit, and the inertial acceleration in the cockpit is slowed down. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the utility model;

[0014] Figure 2 It is a top structure schematic view of the utility model;

[0015] Figure 3 It is a side structure schematic view of the utility model;

[0016] Figure 4 It is a structure schematic view of the auxiliary frame;

[0017] Figure 5 It is a structure schematic view of the clasp;

[0018] Figure 6 It is a structure schematic view of the connecting piece;

[0019] Figure 7 Structure diagram of the longitudinal beam;

[0020] Figure 8 Structure diagram of the longitudinal beam;

[0021] Figure 9 Structure diagram of the longitudinal beam cover plate.

[0022] In the figure, 1 is a subframe, 101 is a mounting hole one, 102 is a mounting plate, 102A is a mounting hole two, 2 is a connecting piece, 201 is a bottom plate, 201A is a mounting hole three, 202 is a resisting plate, 202A is a reinforcing rib one, 203 is an inner clamping plate, 203A is a collapsing hole, 203B is a collapsing groove one, 204 is an outer clamping plate, 205 is a top pressing plate, 205A is an inner turning plate, 205B is a collapsing groove two, 205C is an outer turning plate, 3 is a longitudinal beam, 301 is a rocker beam mounting hole, 302 is an energy absorption box mounting hole, 303 is a boss, 303A is a vacuum booster motor mounting hole, 304 is a weight reduction hole, 305 is an opening, 306 is a flange one, 4 is a longitudinal beam cover plate, 401 is a flange one, 402 is a flange two, 403 is a collapsing groove three, 404 is a reinforcing rib two, 405 is a reinforcing plate avoiding groove, 406 is a wire harness mounting hole, 5 is a clamping ring, 501 is a mounting hole four, 502 is a flange two. DETAILED DESCRIPTION

[0023] The utility model will be further described below in combination with the drawings:

[0024] The orientation terms involved in the paragraphs of detailed description are only for the convenience of the person skilled in the art to understand the technical solutions described in the application according to the visual orientation shown in the drawings. Except for explicit provisions and limitations, the terms "set", "install", "connect" and the like should be understood broadly, and the person skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

[0025] As shown in Figure 1 , Figure 2 and Figure 3 , a front body structure of a vehicle includes a subframe 1, the subframe 1 is fixed with a mounting hole one 101, through the mounting hole one 101, the power assembly of the vehicle can be installed and fixed; Figure 4As shown, the front top end of the auxiliary frame 1 is fixedly connected with a mounting plate 102, mounting holes two 102A are fixedly arranged on the mounting plate 102, a connecting piece 2 is fixedly connected to the mounting plate 102, the bottom of the connecting piece 2 is fixedly connected with the mounting plate 102 through bolts, and the top of the connecting piece 2 is welded and fixed with the longitudinal beam 3. By arranging the connecting piece 2, the local hard point of the front part of the longitudinal beam 3 caused by directly fixing the auxiliary frame 1 with the longitudinal beam 3 in the traditional structure is avoided, the force transmission channel of the impact force is affected, the connecting piece 2 can be deformed when a collision accident occurs, not only itself can participate in energy absorption, but also releases the collapse deformation space of the longitudinal beam 3, and the collision safety performance of the vehicle is improved.

[0026] The longitudinal beam 3 is fixedly connected to the connecting piece 2, and the longitudinal beam cover plate 4 is fixedly connected to the outer side wall of the longitudinal beam 3, as shown in Figure 5 As shown, the rear bottom end of the auxiliary frame 1 is fixedly connected with a snap ring 5, mounting holes four 501 are fixedly arranged on the snap ring 5, the mounting holes four 501 are fixedly connected with the longitudinal beam 3 through bolts, and the two sides of the snap ring 5 extend downward with flanges two 502. By arranging the downward flanges two 502, the structural strength of the snap ring 5 is increased, and the connection strength of the rear part of the auxiliary frame 1 and the longitudinal beam 3 is improved.

[0027] As shown in Figure 6 The connecting piece 2 comprises a bottom plate 201, mounting holes three 201A are fixedly arranged on the bottom plate 201, the mounting holes three 201A are fixedly connected with the mounting holes two 102A through bolts, a top pressing plate 205 is fixedly connected to the top of the bottom plate 201, an inner flange 205A is fixedly connected to the side of the top pressing plate 205, the inner flange 205A is inwardly folded, an outer flange 205C is fixedly connected to the top of the top pressing plate 205, the outer flange 205C is outwardly folded, a resisting plate 202 is fixedly connected to the bottom of the bottom plate 201, a reinforcing rib one 202A is fixedly arranged on the resisting plate 202, the bottom of the longitudinal beam 3 is supported and connected through the outer flange 205C and the resisting plate 202, the supporting strength of the connecting piece 2 to the longitudinal beam 3 is improved through the arrangement of the inner flange 205A and the reinforcing rib one 202A, the connecting piece 2 is deformed to participate in collision energy absorption through the arrangement of the collapse groove two 205B, the collapse groove one 203B and the collapse hole 203A. An outer clamping plate 204 is fixedly connected to the outer end side wall of the bottom plate 201, and an inner clamping plate 203 is fixedly connected to the inner end side wall of the bottom plate 201. The bottom of the longitudinal beam 3 is welded and fixed with the outer flange 205C and the resisting plate 202, and the inner clamping plate 203 is welded and fixed with the side wall of the longitudinal beam 3.

[0028] The top pressing plate 205 is fixedly provided with a collapse groove two 205B, and the inner clamping plate 203 is fixedly provided with a collapse groove one 203B and a collapse hole 203A. The collapse groove two 205B and the collapse groove one 203B are vertically arranged, and have strong supporting force on the downward pressure from the longitudinal beam 3, but when the structure is subjected to impact force from the horizontal direction, the structure can collapse and deform under the guidance of the collapse groove, so as to weaken the impact force and reduce the impact force transmitted to the cockpit.

[0029] As shown in Figure 7 and Figure 8 , the longitudinal beam 3 is fixedly provided with an energy absorption box mounting hole 302 at the front end, and the energy absorption box is fixedly connected with the energy absorption box mounting hole 302 through bolts. The top of the longitudinal beam 3 is fixedly provided with a boss 303, and the boss 303 is fixedly provided with a vacuum booster motor mounting hole 303A. The vacuum booster motor is fixedly connected on the boss 303 through bolts. The rear side wall of the longitudinal beam 3 is fixedly provided with a weight reduction hole 304. By arranging multiple groups of weight reduction holes 304, stress release of the longitudinal beam 3 can be achieved, so as to avoid stress concentration at this position of the longitudinal beam 3 when impact occurs. The rear bottom wall of the longitudinal beam 3 is fixedly provided with an opening 305, which can position the installation of related accessories and allow the wire harness to pass through.

[0030] The rear end of the longitudinal beam 3 is fixedly provided with a rocker beam mounting hole 301, and the rocker beam is fixedly connected with the rocker beam mounting hole 301 through bolts. The outer wall of the longitudinal beam 3 extends in a vertical direction and has a flange one 306. By arranging the flange one 306, the structural strength of the longitudinal beam 3 can be increased, and the upper limit of the impact force that the longitudinal beam 3 can withstand can be improved. The arrangement of the flange one 306 also increases the contact area between the longitudinal beam 3 and the longitudinal beam cover plate 4, and the welding area of the two is larger, thereby improving the connection strength of the two.

[0031] As shown in Figure 9 , the front end of the longitudinal beam cover plate 4 extends outwardly and has a flange one 401. The front part of the longitudinal beam cover plate 4 is fixedly provided with a collapse groove three 403. The rear part of the collapse groove three 403 is fixedly provided with a reinforcing rib two 404. The upper part of the reinforcing rib two 404 is fixedly provided with a reinforcing plate avoiding groove 405. A plurality of wire harness mounting holes 406 are fixedly arranged in the middle of the longitudinal beam cover plate 4. The rear end of the longitudinal beam cover plate 4 extends outwardly and has a flange two 402. The arrangement of the flange one 401 and the flange two 402 can cooperate with the longitudinal beam 3 to complete the installation and cooperation of the energy absorption box and the rocker beam. The arrangement of the reinforcing rib two 404 improves the structural strength of the longitudinal beam cover plate 4. The collapse groove three 403 is vertically arranged and can cooperate with the energy absorption box to first collapse and absorb energy at the initial stage of the collision, so as to avoid rapid and direct transmission of the impact force to the cockpit, and slow down the inertial acceleration in the cockpit.

[0032] The utility model discloses a connecting piece 2 is set up, avoid traditional structure, the partial hard point of longitudinal beam 3 front part is caused to longitudinal beam 3 with vice frame 1 direct fixed connection, influence the force transmission channel of impact force, when the collision accident occurs, connecting piece 2 can deform, not only can participate in energy absorption itself, more longitudinal beam 3 release collapse deformation space, improve the crash safety performance of vehicle, through setting inboard plate 205A and reinforcing rib no.

Claims

1. A front body structure of a vehicle, characterized by: The subframe is provided with mounting hole one, the front top of the subframe is fixedly connected with a mounting plate, the mounting plate is provided with mounting hole two, the mounting plate is fixedly connected with a connecting piece, the connecting piece is fixedly connected with a longitudinal beam, the outer sidewall of the longitudinal beam is fixedly connected with a longitudinal beam cover plate, the rear bottom of the subframe is fixedly connected with a snap ring, the snap ring is provided with mounting hole four, mounting hole four is fixedly connected with the longitudinal beam through bolts, and the snap ring is provided with flange two on both sides.

2. The front body structure of a vehicle according to claim 1, characterized by: The connecting piece comprises a bottom plate, the bottom plate is provided with mounting hole three, mounting hole three is fixedly connected with mounting hole two through bolts, the top of the bottom plate is fixedly connected with a top pressing plate, the side of the top pressing plate is fixedly connected with an inner turning plate, the top of the top pressing plate is fixedly connected with an outer turning plate, the bottom of the bottom plate is fixedly connected with a resisting plate, the resisting plate is provided with reinforcing rib one, the outer end sidewall of the bottom plate is fixedly connected with an outer clamping plate, the inner end sidewall of the bottom plate is fixedly connected with an inner clamping plate, and the inner clamping plate and the outer clamping plate are fixedly connected with the inner turning plate.

3. The front body structure of a vehicle according to claim 2, characterized by: The top pressing plate is provided with collapse groove two, the inner clamping plate is provided with collapse groove one and collapse hole.

4. The front body structure of a vehicle according to claim 1, characterized by: The front end of the longitudinal beam is provided with energy absorption box mounting hole, the top of the longitudinal beam is provided with a boss, the boss is provided with vacuum power machine mounting hole, the rear sidewall of the longitudinal beam is provided with weight reduction hole, the rear bottom wall of the longitudinal beam is provided with opening, the rear end of the longitudinal beam is provided with door sill beam mounting hole, and the outer wall of the longitudinal beam is provided with flange one in the vertical direction.

5. The front body structure of a vehicle according to claim 1, characterized by: The front end of the longitudinal beam cover plate is fixedly outwardly extended with flange one, the front part of the longitudinal beam cover plate is provided with collapse groove three, the rear part of the collapse groove three is provided with reinforcing rib two, the upper part of the reinforcing rib two is provided with reinforcing plate avoiding groove, the middle part of the longitudinal beam cover plate is provided with a plurality of wire harness mounting holes, and the rear end of the longitudinal beam cover plate is fixedly outwardly extended with flange two.