Seat cross beam side impact force transmission structure and vehicle

Abstract

The utility model provides a seat cross beam side impact force transmission structure and a vehicle, and belongs to the technical field of vehicles, the seat cross beam side impact force transmission structure comprises a seat cross beam assembly and a doorsill beam, the seat cross beam assembly comprises a seat cross beam block, an outer mounting block connected to the outer end of the seat cross beam block and an inner mounting block connected to the inner end of the seat cross beam block; the outer mounting block is connected with the doorsill beam; and the doorsill beam, the outer mounting block, the seat cross beam block and the inner mounting block form a main side collision force transmission channel. According to the seat cross beam side collision force transmission structure, the seat cross beam assembly is divided into the outer installation block, the seat cross beam block and the inner installation block which are sequentially connected, in the vehicle side collision process, the outer installation block and the inner installation block serve as a part of force transmission to participate in side collision energy absorption, and the side collision safety performance of a vehicle can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicles, and in particular relates to a seat crossbeam side impact force transmission structure and a vehicle. Background Art

[0002] When a vehicle faces a side collision, the seat beam needs to effectively absorb and transmit the collision energy generated by the side collision to reduce the possibility of occupant injury.

[0003] At present, the side impact force transmission channel of the vehicle seat crossbeam assembly is generally formed by welding the seat crossbeam body and the threshold beam. The outer side of the seat crossbeam body needs to be reinforced and connected to the threshold beam through an externally mounted reinforcement plate, and the inner side needs to be connected to the middle channel on the front floor assembly through an internally mounted reinforcement plate. At present, the side impact force transmission of the vehicle seat crossbeam assembly has the following defects: (1) The inner and outer reinforcement plates overlap with the seat crossbeam body in the vertical direction. During a vehicle side impact, the inner and outer reinforcement plates cannot absorb energy in the side impact, resulting in poor vehicle side impact safety performance.

[0004] (2) At present, most vehicle seat crossbeam assemblies are made of high-strength steel or hot-formed steel, which has high molding costs, difficult precision control, and heavy weight, which is not conducive to the lightweight design of the entire vehicle, especially for electric vehicles. The heavy weight affects the range of electric vehicles; and during use, it is not conducive to improving the NVH (Noise, Vibration, Harshness) performance of the entire vehicle. Utility Model Content

[0005] The embodiment of the utility model provides a seat cross beam side impact force transmission structure and a vehicle, aiming to solve the problem of poor safety performance of the current seat cross beam side impact.

[0006] In the first aspect, in order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: to provide a seat beam side impact force transmission structure, including:

[0007] A seat crossbeam assembly, comprising a seat crossbeam block, an outer mounting block connected to an outer end of the seat crossbeam block, and an inner mounting block connected to an inner end of the seat crossbeam block;

[0008] The threshold beam, the outer mounting block is connected to the threshold beam; the threshold beam and the outer mounting block, the seat cross beam block and the inner mounting block form a main side impact force transmission channel.

[0009] In combination with the first aspect, in one achievable manner, the outer mounting block, the seat cross beam block and the inner mounting block are all foamed aluminum parts.

[0010] In combination with the first aspect, in one achievable manner, the outer mounting block, the seat cross beam block and the inner mounting block are connected by bonding with an adhesive layer.

[0011] In combination with the first aspect, in one achievable manner, a buffer gap is provided between the outer mounting block and the door sill beam, and the buffer gap is filled with a foaming agent.

[0012] In combination with the first aspect, in one achievable manner, the width of the buffer gap is 2.5-3 mm.

[0013] In combination with the first aspect, in an achievable manner, the seat crossbeam assembly also includes a metal base plate fixedly mounted on the front floor assembly; the outer end of the metal base plate is fixedly mounted on the door sill beam, and the inner end is fixedly mounted on the central channel on the front floor assembly; the outer mounting block, the seat crossbeam block and the inner mounting block are sequentially bonded to the metal base plate from the outside to the inside; wherein, the end of the metal base plate facing the central channel is the inner end, and the end away from the central channel is the outer end.

[0014] In combination with the first aspect, in one achievable manner, the seat cross beam assembly further includes an outer seat mounting plate and an inner seat mounting plate, the outer seat mounting plate being fixed between the outer mounting block and the threshold beam, and the inner seat mounting plate being fixed between the inner mounting block and the middle channel.

[0015] In combination with the first aspect, in a feasible manner, the seat cross beam assembly also includes a lower reinforcement block, which is fixed below the front floor assembly and between the sill beam and the front floor longitudinal beam, and the sill beam and the lower reinforcement block constitute an auxiliary side impact force transmission channel; the lower reinforcement block is a foamed aluminum part.

[0016] In combination with the first aspect, in one achievable manner, the thickness of the lower reinforcement block is in the up-down direction of the vehicle body and gradually increases along the direction of force transmission in a side impact.

[0017] Compared with the prior art, the seat crossbeam side impact force transmission structure provided by the utility model has the beneficial effect of dividing the seat crossbeams on the left and right sides of the seat crossbeam assembly into three parts: an outer mounting block, a seat crossbeam block and an inner mounting block which are connected in sequence. In a side impact of the vehicle, the outer mounting block and the inner mounting block participate in the side impact energy absorption as part of the force transmission, thereby improving the side impact safety performance of the vehicle.

[0018] In a second aspect, an embodiment of the utility model further provides a vehicle, comprising the seat crossbeam side impact force transmission structure.

[0019] The vehicle provided by the embodiment of the utility model adopts this force transmission structure. When the vehicle is in a side collision, the outer mounting block and the inner mounting block participate in the side collision energy absorption as a part of the force transmission, thereby improving the side collision safety performance of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the three-dimensional structure of the seat crossbeam side impact force transmission structure provided by the embodiment of the utility model Figure 1 (looking down);

[0021] Figure 2 A schematic diagram of the three-dimensional structure of the seat crossbeam side impact force transmission structure provided by the embodiment of the utility model Figure 2 (looking down);

[0022] Figure 3 A schematic diagram of the three-dimensional structure of the seat crossbeam side impact force transmission structure provided by the embodiment of the utility model Figure 3 (looking down);

[0023] Figure 4 A schematic diagram of the three-dimensional structure of the seat crossbeam side impact force transmission structure provided by the embodiment of the utility model Figure 4 (Looking up);

[0024] Figure 5 A schematic diagram of a top view of a side impact force transmission structure of a seat crossbeam provided in an embodiment of the utility model;

[0025] Figure 6 For along Figure 5 The cross-sectional structure diagram along the AA line;

[0026] Description of reference numerals:

[0027] 1. Seat crossbeam block; 2. Outer seat mounting plate; 3. Outer mounting block; 4. Metal base plate; 5. Inner mounting block; 6. Inner seat mounting plate; 7. B-pillar; 8. Front floor assembly; 9. Door sill beam; 10. Lower reinforcement block; 11. Front floor longitudinal beam; 12. Center channel. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] It should be noted that in the description of the present invention, the definition of the inner and outer directions is based on the central channel 12 on the front floor assembly 8 of the vehicle, the end of the component facing the central channel 12 is the inner end, and the end away from the central channel 12 is the outer end. Figure 1 and Figure 2 The end of the seat beam assembly facing the central channel 12 is the inner end, and the end away from the central channel 12 is the outer end.

[0030] Please also read Figures 1 to 6 The seat crossbeam side impact force transmission structure provided by the utility model is now described. The seat crossbeam side impact force transmission structure comprises: a seat crossbeam assembly and a threshold beam 9, the seat crossbeam assembly comprises a seat crossbeam block 1, an outer mounting block 3 connected to the outer end of the seat crossbeam block 1 and an inner mounting block 5 connected to the inner end of the seat crossbeam block 1; the outer mounting block 3 is connected to the threshold beam 9; the threshold beam 9 and the outer mounting block 3, the seat crossbeam block 1 and the inner mounting block 5 form a main side impact force transmission channel.

[0031] Compared with the prior art, the seat crossbeam side impact force transmission structure provided by the utility model has the beneficial effect that the seat crossbeam is generally composed of three parts: an outer mounting block 3, a seat crossbeam block 1 and an inner mounting block 5 which are connected in sequence. In a side impact of the vehicle, the outer mounting block 3 and the inner mounting block 5 participate in the side impact energy absorption as part of the force transmission, thereby improving the side impact safety performance of the vehicle.

[0032] The seat crossbeam side impact force transmission structure provided by the utility model comprises a seat crossbeam assembly, a door sill beam and a B-pillar 7 forming a complete annular structure, so that the torsional rigidity and the collision performance of the vehicle body are greatly improved.

[0033] It should be noted that since the structure of the seat crossbeam assembly is symmetrical with the central channel 12 as the axis of symmetry, for the side impact transmission structure of the seat crossbeams on the left and right sides, the outer mounting blocks 3 are connected to the door sill beam 9, and the inner mounting blocks 5 are connected to the central channel 12.

[0034] In some embodiments, Figure 6 As shown, the outer mounting block 3, the seat cross beam block 1 and the inner mounting block 5 are all made of foamed aluminum. The energy absorption effect of the foamed aluminum material is related to its density (1-porosity), and has the greatest impact. The control of porosity is relatively simple, and is only related to the foaming agent and temperature, and there is no mold cost. Therefore, by adjusting the porosity of the foamed aluminum material, not only can the side impact energy absorption performance requirements of different models and the NVH performance requirements of different models be achieved, but also the optimal lightweight solution for models of different weights and different safety requirements can be achieved; and different models will not incur mold costs during the parts switching process, and only the porosity of the foamed aluminum material needs to be adjusted.

[0035] For example, the porosity design adopted in this embodiment is that the inner mounting block 5 has a porosity of 60%, the seat cross beam block 1 has a porosity of 50%, and the outer mounting block 3 has a porosity of 70%.

[0036] Preferably, using the up-and-down direction of the vehicle as the thickness calculation, the thickness of the outer mounting block 3 and the thickness of the inner mounting block 5 are both greater than the thickness of the seat crossbeam block 1. After being assembled together, the outer mounting block 3 and the inner mounting block 5 are significantly higher than the height of the seat crossbeam block 1. This not only ensures the reliability and effectiveness of the outer mounting block 3 and the inner mounting block 5 in absorbing energy, but also strengthens the connection position of the seat crossbeam assembly connecting the sill beam 9 and the middle channel 12, thereby further ensuring the effectiveness of the force transmission channel.

[0037] For example, the thickness of the seat crossbar block 1 is 55 mm, and the thickness of the outer mounting block 3 and the inner mounting block 5 is 106 mm.

[0038] The material of the door sill beam 9 is an aluminum profile. This embodiment improves the side collision safety performance of the vehicle by combining the foamed aluminum and the aluminum profile.

[0039] In some embodiments, Figure 6 As shown, the outer mounting block 3, the seat cross beam block 1 and the inner mounting block 5 are connected by adhesive layer. The adhesive layer with a certain thickness is used for connection, and the adhesive layer has the function of connecting and also plays the role of tolerance absorption. Optionally, the thickness of the adhesive layer is 0.5-1.5mm, and preferably the thickness of the adhesive layer is 1mm.

[0040] In some embodiments, Figure 6 As shown, a buffer gap (not marked in the figure) is provided between the outer mounting block 3 and the threshold beam 9, and the buffer gap is filled with a foaming agent. A gap is left between the outer mounting block 3 and the threshold inner plate, and the foaming agent is filled to avoid the occurrence of friction noise during driving, which is beneficial to improving the NVH performance of the whole vehicle.

[0041] In some embodiments, the width of the buffer gap is 2.5-3 mm. For example, the width of the buffer gap is 2.5 mm, 2.6 mm, 2.8 mm, 3 mm, etc.

[0042] In some embodiments, Figures 1 to 3 , Figure 5 and Figure 6 As shown, the seat cross beam assembly also includes a metal base plate 4 fixed on the front floor assembly 8, and the outer mounting block 3, the seat cross beam block 1 and the inner mounting block 5 are bonded to the metal base plate 4; the outer end of the metal base plate 4 is fixed on the door sill beam 9, and the inner end is fixed on the middle channel 12. The metal base plate 4 can improve the structural strength of the seat cross beam assembly, and can improve the anti-deformation performance and energy absorption performance of the seat cross beam assembly by combining with foamed aluminum parts with different porosities.

[0043] During installation, the outer mounting block 3, the seat cross beam block 1 and the inner mounting block 5 are bonded together and then bonded to the metal base plate 4 as a whole. The left and right ends and the front and rear edges of the metal base plate 4 are designed with welding edges to facilitate spot welding connection with the front floor assembly 8, the middle channel 12 and the door sill beam 9.

[0044] Preferably, the width of the metal base plate 4 along the front-rear direction of the vehicle body is greater than the width of the outer mounting block 3, the seat cross beam block 1 and the inner mounting block 5 along the front-rear direction of the vehicle body, which can provide reliable support for the seat cross beam block.

[0045] In some embodiments, Figures 1 to 3 , Figure 5 and Figure 6 As shown, the seat crossbeam assembly further includes an outer seat mounting plate 2 and an inner seat mounting plate 6. The outer seat mounting plate 2 is fixed between the outer mounting block 3 and the threshold beam 9, and the inner seat mounting plate 6 is fixed between the inner mounting block 5 and the middle channel 12. The outer seat mounting plate 2 and the inner seat mounting plate 6 provide mounting points for the installation of the seat, so nuts can be welded on both the outer seat mounting plate 2 and the inner seat mounting plate 6, and mounting holes are designed accordingly.

[0046] The outer seat mounting plate 2 and the outer mounting block 3, as well as the inner seat mounting plate 6 and the inner mounting block 5 are all bonded and connected, and are all welded to the door sill beam 9 and the middle channel 12. The outer seat mounting plate 2 and the inner seat mounting plate 6 are both designed with welding edges for easy welding, and the inner seat mounting plate 6 is also directly connected to the reinforcing plate on the middle channel 12 by two-way welding, so that the force transmission channel is more complete.

[0047] In the seat crossbeam side impact force transmission structure provided in this embodiment, the structure and material used in the seat crossbeam assembly, compared with the traditional steel structure seat crossbeam, not only achieve weight reduction, but also improve the side impact survival space, thereby meeting the vehicle side impact safety requirements.

[0048] In some embodiments, Figure 4 and Figure 6 As shown, the seat crossbeam assembly also includes a lower reinforcement block 10, which is fixed below the front floor assembly 8 and between the door sill beam 9 and the front floor longitudinal beam 11. The door sill beam 9 and the lower reinforcement block 10 constitute an auxiliary side impact force transmission channel; the lower reinforcement block 10 is a foamed aluminum part.

[0049] like Figure 6 As shown by the middle arrow, when the vehicle has a side collision, the side collision energy is dispersed and transmitted along the main side collision force transmission channel and the auxiliary side collision force transmission channel, which greatly reduces the side collision energy on the seat cross beam. The auxiliary side collision force transmission channel disperses the collision energy downward and away from the occupants above the seats, thereby greatly improving the safety performance of the entire vehicle in a side collision.

[0050] At the same time, for different models, foamed aluminum materials with different porosities can be selected to make the lower reinforcement block 10 to achieve different weights and different energy absorption effects. Optionally, the lower reinforcement block 10 is located below the outer mounting block 3, and its porosity is 70%, which is the same as the porosity of the outer mounting block 3.

[0051] In some embodiments, Figure 4 and Figure 6 As shown, the thickness of the lower reinforcement block 10 is in the vertical direction of the vehicle body, and gradually increases along the force transmission direction of the side collision. The lower reinforcement block 10 is bonded and connected to the front floor assembly 8, the door sill beam 9 and the front floor longitudinal beam 11. Since the foamed aluminum is an isotropic material, the trapezoidal structure along the collision direction can achieve a step-by-step collapse effect, further improving the side collision energy absorption effect.

[0052] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0053] Based on the same inventive concept, an embodiment of the present application also provides a vehicle, including the seat crossbeam side impact force transmission structure.

[0054] The vehicle provided by the embodiment of the utility model adopts this force transmission structure. When the vehicle is in a side collision, the outer mounting block 3 and the inner mounting block 5 participate in the side collision energy absorption as a part of the force transmission, which can improve the side collision safety performance of the vehicle.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat beam side impact force transmission structure, characterized in that: include: A seat crossbeam assembly comprises a seat crossbeam block (1), an outer mounting block (3) connected to the outer end of the seat crossbeam block (1), and an inner mounting block (5) connected to the inner end of the seat crossbeam block (1); and A threshold beam (9) is connected to the outer mounting block (3); the threshold beam (9), the outer mounting block (3), the seat cross beam block (1) and the inner mounting block (5) form a main side impact force transmission channel.

2. The seat crossbeam side impact force transmission structure according to claim 1, characterized in that: The outer mounting block (3), the seat crossbeam block (1) and the inner mounting block (5) are all foamed aluminum parts.

3. The seat crossbeam side impact force transmission structure according to claim 2, characterized in that: The outer mounting block (3), the seat crossbeam block (1) and the inner mounting block (5) are connected by bonding with an adhesive layer.

4. The seat crossbeam side impact force transmission structure according to claim 2, characterized in that: A buffer gap is provided between the outer mounting block (3) and the threshold beam (9), and the buffer gap is filled with a foaming agent.

5. The seat crossbeam side impact force transmission structure according to claim 4, characterized in that: The width of the buffer gap is 2.5-3 mm.

6. The seat cross beam side impact force transmission structure as claimed in claim 2, characterized in that: The seat crossbeam assembly further comprises a metal base plate (4) fixedly mounted on the front floor assembly (8); the outer end of the metal base plate (4) is fixedly mounted on the door sill beam (9), and the inner end is fixedly mounted on the middle channel (12) on the front floor assembly (8); the outer mounting block (3), the seat crossbeam block (1) and the inner mounting block (5) are sequentially bonded to the metal base plate (4) from the outside to the inside; wherein the end of the metal base plate (4) facing the middle channel (12) is the inner end, and the end away from the middle channel (12) is the outer end.

7. The seat cross beam side impact force transmission structure according to claim 6, characterized in that: The seat crossbeam assembly further comprises an outer seat mounting plate (2) and an inner seat mounting plate (6), wherein the outer seat mounting plate (2) is fixedly arranged between the outer mounting block (3) and the threshold beam (9), and the inner seat mounting plate (6) is fixedly arranged between the inner mounting block (5) and the middle channel (12).

8. The seat cross beam side impact force transmission structure according to any one of claims 1 to 7, characterized in that: The seat crossbeam assembly also includes a lower reinforcement block (10), which is fixedly arranged below the front floor assembly (8) and between the door sill beam (9) and the front floor longitudinal beam (11), and the door sill beam (9) and the lower reinforcement block (10) form an auxiliary side impact force transmission channel; the lower reinforcement block (10) is a foamed aluminum part.

9. The seat cross beam side impact force transmission structure as claimed in claim 8, characterized in that: The lower reinforcement block (10) has a thickness in the up-down direction of the vehicle body and gradually increases in the direction of side impact force transmission.

10. A vehicle, characterized in that: It comprises a seat cross beam side impact force transmission structure as described in any one of claims 1-9.

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