Force transmission structure, vehicle body frame and vehicle

Abstract

The present invention relates to a force transmission structure, a vehicle body frame and an automobile. The force transmission structure includes: a front longitudinal beam; a rear plate of the front longitudinal beam, the root of the front longitudinal beam being connected to the rear plate of the front longitudinal beam; a front bulkhead and a front bulkhead cross member, the front bulkhead being disposed on the front bulkhead cross member, and the front bulkhead cross member being connected to the rear plate of the front longitudinal beam; an inner panel of the A-pillar, the inner panel of the A-pillar being connected to both the front bulkhead and the rear plate of the front longitudinal beam; an inclined support, the inclined support being inclinedly disposed on the front bulkhead, and both ends of the inclined support being connected to the rear plate of the front longitudinal beam and the inner panel of the A-pillar respectively; and a sill beam, the sill beam being connected to the rear plate of the front longitudinal beam. A part of the impact force can be effectively transmitted from the root of the front longitudinal beam through the rear plate of the front longitudinal beam and the inclined support to the inner panel of the A-pillar, thereby reducing the force-bearing burden on the rear plate of the front longitudinal beam and effectively preventing the rear plate of the front longitudinal beam from collapsing and brittle fracturing. It can improve the force transmission characteristics of the vehicle body during a collision, reduce the degree of collapse and fracture during impact, and enhance the stability and integrity of the vehicle body structure.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and particularly to a force transmission structure, a vehicle body frame and an automobile. Background Art

[0002] At present, automobiles usually adopt a steel body structure. In order to improve the strength of the body structure and the collision resistance ability, it is necessary to strengthen the front bulkhead beam lapped with the A-pillar. However, the essence of strengthening the front bulkhead beam lies only in strengthening the local structure of the vehicle body, and it cannot improve the force transmission characteristics, nor can it improve the strength of the vehicle body structure to reduce the degree of cracking when the vehicle body is impacted. Summary of the Invention

[0003] Based on this, it is necessary to provide a force transmission structure that can improve the force transmission characteristics when the vehicle body is collided, reduce the degree of cracking during the impact, and enhance the stability and integrity of the vehicle body structure; the vehicle body frame and the automobile adopting this force transmission structure can effectively improve the force transmission characteristics and enhance the collision safety performance of the vehicle body.

[0004] The technical solution is as follows:

[0005] On the one hand, the present application provides a force transmission structure, which includes:

[0006] Front longitudinal beam;

[0007] Rear plate of the front longitudinal beam, the root of the front longitudinal beam is connected to the rear plate of the front longitudinal beam;

[0008] Front bulkhead and front bulkhead beam, the front bulkhead is arranged on the front bulkhead beam, and the front bulkhead beam is connected to the rear plate of the front longitudinal beam;

[0009] Inner panel of the A-pillar, the inner panel of the A-pillar is connected to both the front bulkhead and the rear plate of the front longitudinal beam;

[0010] Oblique support, the oblique support is inclinedly arranged on the front bulkhead, and both ends of the oblique support are respectively connected to the rear plate of the front longitudinal beam and the inner panel of the A-pillar; and

[0011] Sill beam, the sill beam is connected to the rear plate of the front longitudinal beam.

[0012] When the above force transmission structure is subjected to an external collision, the impact force is first transmitted from the front longitudinal beam to the rear plate of the front longitudinal beam, and then dispersed by the rear plate of the front longitudinal beam to the cross beam of the front panel and the sill beam, and then the force is transmitted to the middle channel and the rear part of the vehicle body. At the same time, since the root of the front longitudinal beam is connected to the rear plate of the front longitudinal beam, the inner plate of the A-pillar is connected to the front panel and the rear plate of the front longitudinal beam respectively, and an inclined support is designed and installed on the front panel, and both ends of the inclined support are reliably connected to the rear plate of the front longitudinal beam and the inner plate of the A-pillar respectively. Thus, a new force transmission channel is formed: that is, during the force transmission process, a part of the impact force can be effectively transmitted from the root of the front longitudinal beam to the inner plate of the A-pillar through the rear plate of the front longitudinal beam and the inclined support, thereby reducing the force-bearing burden on the rear plate of the front longitudinal beam and effectively preventing the rear plate of the front longitudinal beam from collapsing and cracking; and through the setting of the inclined support, the local strength and structural stability of the area between the rear plate of the front longitudinal beam and the inner plate of the A-pillar can also be enhanced, especially playing a good role in restraining structural deformation during offset collision, while reducing the intrusion amount of the front panel and protecting the safety of passengers. In summary, compared with the force transmission structure in the traditional vehicle body, the force transmission structure of this solution can improve the force transmission characteristics of the vehicle body during collision, reduce the degree of collapse and cracking during impact, and enhance the structural stability and integrity of the vehicle body.

[0013] The technical solution of the present application will be further described below:

[0014] In one embodiment, the inclined support, the rear plate of the front longitudinal beam and the inner plate of the A-pillar cooperate to form a triangular support structure.

[0015] In one embodiment, an energy absorption cavity is formed by the spaced cooperation between the inclined support and the front panel.

[0016] In one embodiment, the inclined support is provided with a collapse hole penetrating its thickness direction.

[0017] In one embodiment, the inclined support includes a force transmission main body and a mounting plate connected to the force transmission main body, and the mounting plate is provided with the collapse hole and mounting holes.

[0018] In one embodiment, the force transmission structure further includes an inner reinforcing plate of the front longitudinal beam, the inner reinforcing plate of the front longitudinal beam is connected to both the rear plate of the front longitudinal beam and the cross beam of the front panel, and the inner reinforcing plate of the front longitudinal beam and the rear plate of the front longitudinal beam cooperate to form a mounting cavity, and the root of the front longitudinal beam is fixed in the mounting cavity.

[0019] In one embodiment, the force transmission structure further includes a front longitudinal beam connecting plate, an upper beam and an A-pillar reinforcing plate. One end of the front longitudinal beam connecting plate is connected to the front end of the front longitudinal beam, the other end of the front longitudinal beam connecting plate is connected to one end of the upper beam, the other end of the upper beam is connected to the A-pillar reinforcing plate, and the A-pillar reinforcing plate is covered on the inner plate of the A-pillar.

[0020] In one embodiment, the force transmission structure further includes a bumper beam and an energy absorption box, and the bumper beam is connected to the front longitudinal beam through the energy absorption box;

[0021] Or / and the force transmission structure further includes a middle channel beam and a front cross beam. One end of the middle channel beam is connected to the front bulkhead cross beam, and the middle channel beam is connected to the sill beam through the front cross beam.

[0022] On the other hand, the present application also provides a vehicle body frame and an automobile, which include the force transmission structure as described above. By adopting this force transmission structure, the vehicle body frame and the automobile can effectively improve the force transmission characteristics and enhance the collision safety performance of the vehicle body. Description of the Drawings

[0023] Figure 1 It is a schematic structural diagram of the force transmission structure according to an embodiment of the present invention;

[0024] Figure 2 For Figure 1 It is a schematic structural diagram of the force transmission structure shown from the rear view angle;

[0025] Figure 3 It is a demonstration diagram of the collision force transmission of the force transmission structure according to an embodiment of the present invention;

[0026] Figure 4 For Figure 2 It is a schematic structural diagram of the diagonal brace in the force transmission structure shown.

[0027] Description of the Reference Numerals:

[0028] 10. Front longitudinal beam, 20. Rear plate of the front longitudinal beam, 30. Front bulkhead, 40. Front bulkhead cross beam, 50. Inner panel of the A-pillar, 60. Diagonal brace, 61. Crashing hole, 62. Force transmission main body, 63. Mounting plate, 64. Mounting hole, 70. Sill beam, 80. Reinforced inner panel of the front longitudinal beam, 90. Connecting plate of the front longitudinal beam, 100. Upper beam, 110. Reinforcing plate of the A-pillar, 120. Bumper beam, 130. Energy absorption box, 140. Middle channel beam, 150. Front cross beam, 160. Windshield cross beam. Detailed Embodiments

[0029] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the protection scope of the present invention.

[0030] It should be noted that when an element is referred to as "fixed to", "disposed on" or "mounted on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time; the specific manner of fixedly connecting an element to another element can be achieved by the prior art and will not be elaborated here. Preferably, a threaded connection is adopted for the fixing method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] In the present invention, the so-called "first" and "second" do not represent specific quantities and sequences, but are only used for name distinction.

[0033] As Figure 1 and Figure 2 As shown, it is a force transmission structure shown in an embodiment of the present application, which is a part of the body frame of an automobile, specifically the front part of the body frame, including the engine compartment and part of the occupant compartment frame. Specifically, the force transmission structure includes: a bumper beam 120, an energy absorption box 130, a front longitudinal beam 10, a rear plate 20 of the front longitudinal beam, a bulkhead 30, a bulkhead cross beam 40, a windshield cross beam 160, an inner panel 50 of the A-pillar, a reinforcement plate 110 of the A-pillar, an inclined support 60, a sill beam 70, a reinforced inner panel 80 of the front longitudinal beam, a connecting plate 90 of the front longitudinal beam, an upper beam 100, a middle channel beam 140, and a front cross beam 150. Among them, the energy absorption box 130, the front longitudinal beam 10, the reinforced inner panel 80 of the front longitudinal beam, the rear plate 20 of the front longitudinal beam, the connecting plate 90 of the front longitudinal beam, the upper beam 100, the inner panel 50 of the A-pillar, the reinforcement plate 110 of the A-pillar, and the sill beam 70 form a set of frame structures, constituting one side of the body frame. In this solution, the body frame includes two sets of frame structures, which are respectively the left and right sides of the body frame and are symmetrically arranged.

[0034] The inner panel 50 of the A-pillar and the reinforcement plate 110 of the A-pillar are formed by welding process and jointly constitute the A-pillar of the vehicle body.

[0035] The crash beam 120 is connected to two energy-absorbing boxes 130 and is arranged at the forefront of the force transmission structure. It is the load-bearing component that is first impacted. Through the collapse of the energy-absorbing box 130, a part of the impact energy can be effectively consumed, which is beneficial to improving the strength and safety of the vehicle body structure. The crash beam 120 is connected to the front longitudinal beam 10 through the energy-absorbing box 130 and can transmit the impact force to the front longitudinal beam 10 and the rear. In the integral forming process, the assembly composed of the crash beam 120 and the energy-absorbing box 130 is assembled with the front longitudinal beam 10 by screwing. Of course, in other embodiments, other forming processes can also be used for connection, such as riveting, bonding, etc.

[0036] The root of the front longitudinal beam 10 is connected to the rear plate 20 of the front longitudinal beam; the front panel 30 is arranged on the front panel cross beam 40, and the front panel cross beam 40 is connected to the rear plate 20 of the front longitudinal beam; the windshield cross beam 160 is arranged on the front panel 30 and is connected to the inner panels 50 of the A-pillars on both sides at both ends; the inner panel 50 of the A-pillar is connected to both the front panel 30 and the rear plate 20 of the front longitudinal beam; the inclined support 60 is inclinedly arranged on the front panel 30, and both ends of the inclined support 60 are respectively connected to the rear plate 20 of the front longitudinal beam and the inner panel 50 of the A-pillar; the sill beam 70 is connected to the rear plate 20 of the front longitudinal beam, one end of the middle channel beam 140 is connected to the front panel cross beam 40, and the middle channel beam 140 is connected to the sill beam 70 through the front cross beam 150.

[0037] In this specific embodiment, the assembly process of the above components is as follows: The front longitudinal beam connecting plate 90 is connected to the front longitudinal beam 10 and the upper beam 100 by using structural adhesive and FDS (Flow Drill Screw). The front longitudinal beam 10 is connected to the inner reinforcing plate 80 of the front longitudinal beam and the rear plate 20 of the front longitudinal beam by screwing. The upper beam 100 is connected to the A-pillar by using structural adhesive and SPR (Self-Piercing Rivet). The front panel 30 is connected to the windshield cross beam 160, the inner panel 50 of the A-pillar, and the front panel cross beam 40 by using structural adhesive and SPR; the rear plate 20 of the front longitudinal beam is connected to the sill beam 70 by screwing; the front panel cross beam 40 is connected to the rear plate 20 of the front longitudinal beam and the middle channel beam 140 by using structural adhesive and FDS; the inclined support 60 is connected to the front panel 30, the rear plate 20 of the front longitudinal beam, and the inner panel 50 of the A-pillar by using structural adhesive and FDS; the front cross beam 150 is connected to the middle channel beam and the sill beam 70 by using structural adhesive and FDS.

[0038] Please continue to refer to Figure 3, when the above-mentioned force transmission structure is subjected to an external collision, the impact force is first transmitted from the front longitudinal beam 10 to the rear plate 20 of the front longitudinal beam, and then dispersed and transmitted by the rear plate 20 of the front longitudinal beam to the cross beam 40 of the front panel and the sill beam 70, and then the force is transmitted to the middle channel and the rear part of the vehicle body; at the same time, since the root of the front longitudinal beam 10 is connected to the rear plate 20 of the front longitudinal beam, the inner panel 50 of the A-pillar is respectively connected to the front panel 30 and the rear plate 20 of the front longitudinal beam, and an inclined support 60 is designed and installed on the front panel 30, and both ends of the inclined support 60 are respectively and reliably connected to the rear plate 20 of the front longitudinal beam and the inner panel 50 of the A-pillar, thus forming a new force transmission channel. That is, during the force transmission process, a part of the impact force can be effectively transmitted from the root of the front longitudinal beam 10 through the rear plate 20 of the front longitudinal beam and the inclined support 60 to the inner panel 50 of the A-pillar, thereby reducing the force-bearing burden of the rear plate 20 of the front longitudinal beam and effectively preventing the rear plate 20 of the front longitudinal beam from collapsing and cracking; and through the setting of the inclined support 60, the local strength and structural stability of the area between the rear plate 20 of the front longitudinal beam and the inner panel 50 of the A-pillar can also be enhanced, especially playing a good role in suppressing structural deformation during offset collision, while reducing the intrusion amount of the front panel 30 and protecting the safety of passengers. In summary, compared with the force transmission structure in the traditional vehicle body, the force transmission structure of this solution can improve the force transmission characteristics of the vehicle body during collision, reduce the degree of cracking caused by impact, and enhance the structural stability and integrity of the vehicle body.

[0039] And it should be noted that due to the structural optimization design scheme of the inclined support 60 adopted, among the above-mentioned components, except that the A-pillar reinforcement plate 110 is made of steel material, the rest of the components are made of aluminum alloy material, which is beneficial to the lightweight design and manufacture of the vehicle body and achieves a good weight reduction effect. And most of the components can be formed by the die-casting aluminum process, and the manufacturing process is simple. This force transmission structure can be applied to the pure electric platform of the aluminum body structure.

[0040] On the basis of the above-mentioned embodiment, in one embodiment, the inclined support 60, the rear plate 20 of the front longitudinal beam and the inner panel 50 of the A-pillar cooperate to form a triangular support structure. Therefore, the inclined support 60, the rear plate 20 of the front longitudinal beam and the inner panel 50 of the A-pillar form a triangular support structure with the best structural stability, which can further improve and optimize the local structural strength and stability, and the inclined inclined support 60 has a great effect on suppressing the offset deformation of the vehicle body under the lateral collision force, and can well improve the structural stability.

[0041] Furthermore, to improve the force transmission characteristics and reduce the adverse effects of the collision force, an energy absorption cavity is formed by the spaced cooperation between the inclined support 60 and the front panel 30. This energy absorption cavity can consume part of the collision impact energy, protect the vehicle body structure from excessive deformation, and improve the structural stability.

[0042] Please continue to refer to Figure 4, Further, the diagonal brace 60 is provided with a collapse hole 61 penetrating through its thickness direction. By providing the collapse hole 61, when the diagonal brace 60 bears the impact force transmitted, it can undergo a slight deformation to consume part of the impact energy, thereby improving the structural strength.

[0043] It can be understood that the structural deformation of the diagonal brace 60 through the collapse hole 61 should not affect the normal operation of the diagonal brace 60 and the entire force transmission structure.

[0044] It can be understood that the number and position of the collapse holes 61 can be obtained according to the specific vehicle model based on the results of simulation analysis and topology optimization, and are not specifically limited herein. And, according to needs, the collapse hole 61 can be designed in shapes such as round holes, special-shaped holes, long slot holes, etc.

[0045] Please continue to refer to Figure 4 , In an embodiment, the diagonal brace 60 includes a force transmission main body 62 and a mounting plate 63 connected to the force transmission main body 62. The mounting plate 63 is provided with the collapse hole 61 and a mounting hole 64. Among them, the force transmission main body 62 is a plate body with a larger thickness. The thickness of the force transmission main body 62 is greater than that of the mounting plate 63. Therefore, its structural stiffness is large, it can bear the main force transmission role, and it is not easy to be crushed. The mounting plate 63 is integrally formed with the force transmission main body 62, and the diagonal brace 60 can be fixedly installed with the front bulkhead 30 through the mounting hole 64.

[0046] In another alternative embodiment, the front longitudinal beam reinforcing inner plate 80 is connected to both the rear plate 20 of the front longitudinal beam and the front bulkhead cross beam 40, and the front longitudinal beam reinforcing inner plate 80 and the rear plate 20 of the front longitudinal beam cooperate to form a mounting cavity, and the root of the front longitudinal beam 10 is fixedly arranged in the mounting cavity. Therefore, the setting of the front longitudinal beam reinforcing inner plate 80 can improve the connection strength between the rear plate 20 of the front longitudinal beam and the front bulkhead cross beam 40; and because the front longitudinal beam reinforcing inner plate 80 and the rear plate 20 of the front longitudinal beam enclose a mounting cavity, the front longitudinal beam 10 can be directly inserted into the mounting cavity during installation, which is convenient for positioning during installation and improves the structural stability. After the assembly is completed, use bolts to lock the root of the front longitudinal beam 10 with the front longitudinal beam reinforcing inner plate 80 and the rear plate 20 of the front longitudinal beam.

[0047] Please continue to refer to Figure 3, In addition, one end of the front longitudinal beam connecting plate 90 is connected to the front end of the front longitudinal beam 10, the other end of the front longitudinal beam connecting plate 90 is connected to one end of the upper beam 100, the other end of the upper beam 100 is connected to the A-pillar reinforcement plate 110, and the A-pillar reinforcement plate 110 is disposed on the inner A-pillar panel 50. Therefore, the provision of the front longitudinal beam connecting plate 90, the upper beam 100, and the A-pillar reinforcement plate 110 provides two additional force transmission channels. One is that part of the impact force is laterally transmitted from the front longitudinal beam 10 to the front longitudinal beam connecting plate 90, then transmitted to the upper beam 100, and then transmitted to the inner A-pillar panel 50 through the upper beam 100 and transmitted backward. The other is that the impact force is also sequentially transmitted through the front longitudinal beam 10, the front longitudinal beam connecting plate 90, and the upper beam 100, and finally transmitted from the A-pillar reinforcement plate 110 to the upper rear of the vehicle body. These two force transmission channels can further improve the force transmission characteristics of the mechanism, strengthen the structural stability, and enhance the safety performance.

[0048] The windshield cross beam 160 connects the two inner A-pillar panels 50 on both sides, which can strengthen the lateral structural strength of the vehicle body frame and improve the impact resistance against side impacts. In addition, the windshield cross beam 160 is used to carry the installation weight of the front windshield.

[0049] The middle channel beam 140 is arranged in parallel between the two sill beams 70 on both sides. The number of the front cross beams 150 is more than one, preferably two in this embodiment, and they are parallelly connected between the two sill beams 70 and are perpendicularly connected to the middle channel beam 140. Therefore, the lateral structural strength and stiffness of the vehicle body frame can be further strengthened.

[0050] On the basis of the above solution, the present application further provides a vehicle body frame and an automobile (not shown), which include the force transmission structure as described above. By adopting this force transmission structure, the vehicle body frame and the automobile can effectively improve the force transmission characteristics and enhance the collision safety performance of the vehicle body.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A force transmission structure, characterized in that, Comprising: Front longitudinal beam; Rear plate of the front longitudinal beam, the root of the front longitudinal beam being connected to the rear plate of the front longitudinal beam; Front bulkhead and front bulkhead cross beam, the front bulkhead being disposed on the front bulkhead cross beam, the front bulkhead cross beam being connected to the rear plate of the front longitudinal beam; Inner panel of A-pillar, the inner panel of A-pillar being connected to both the front bulkhead and the rear plate of the front longitudinal beam; Diagonal brace, the diagonal brace being obliquely disposed on the front bulkhead, and both ends of the diagonal brace being respectively connected to the rear plate of the front longitudinal beam and the inner panel of A-pillar; and Sill beam, the sill beam being connected to the rear plate of the front longitudinal beam; The diagonal brace, the rear plate of the front longitudinal beam and the inner panel of A-pillar cooperate to form a triangular support structure; An energy absorption cavity is formed by the spaced cooperation between the diagonal brace and the front bulkhead; The diagonal brace includes a force transmission main body and a mounting plate connected to the force transmission main body, wherein the thickness of the force transmission main body is greater than the thickness of the mounting plate.

2. The force transmission structure according to claim 1, characterized in that, The diagonal brace is provided with a collapse hole penetrating in its thickness direction.

3. The force transmission structure according to claim 2, characterized in that, The mounting plate is provided with the collapse hole and mounting holes.

4. The force transmission structure according to any one of claims 1 to 3, characterized in that, The force transmission structure further includes an inner reinforcing plate of the front longitudinal beam, the inner reinforcing plate of the front longitudinal beam being connected to both the rear plate of the front longitudinal beam and the front bulkhead cross beam, and an installation cavity is formed by the cooperation between the inner reinforcing plate of the front longitudinal beam and the rear plate of the front longitudinal beam, and the root of the front longitudinal beam is fixedly provided in the installation cavity.

5. The force transmission structure according to claim 4, characterized in that, The force transmission structure further includes a front longitudinal beam connecting plate, an upper beam and an A-pillar reinforcing plate, one end of the front longitudinal beam connecting plate being connected to the front end of the front longitudinal beam, the other end of the front longitudinal beam connecting plate being connected to one end of the upper beam, the other end of the upper beam being connected to the A-pillar reinforcing plate, and the A-pillar reinforcing plate being covered on the inner panel of A-pillar.

6. The force transmission structure according to claim 5, characterized in that, The force transmission structure further includes a bumper beam and an energy absorption box, the bumper beam being connected to the front longitudinal beam through the energy absorption box; Or / and the force transmission structure further includes a middle channel beam and a front cross beam, one end of the middle channel beam being connected to the front bulkhead cross beam, and the middle channel beam being connected to the sill beam through the front cross beam.

7. A vehicle body frame, characterized in that, Comprising the force transmission structure according to any one of claims 1 to 6 above.

8. A motor vehicle, characterized in that, Comprising the vehicle body frame according to claim 7 above.

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