Upper side beam force transmission structure

Abstract

The upper side beam force transmission structure comprises a cabin longitudinal beam, a tower seat, a sub-frame mounting plate assembly, an upper side beam brace plate assembly, an upper side beam assembly and an A-pillar inner plate. The upper end of the sub-frame mounting plate assembly is connected with the cabin longitudinal beam. The upper side beam brace plate assembly is connected with the front end of the cabin longitudinal beam, the sub-frame mounting plate assembly and the upper side beam assembly. The tower seat is connected with the upper side beam assembly and the cabin longitudinal beam. The upper side beam assembly is connected with the A-pillar inner plate. The cabin longitudinal beam, the sub-frame mounting plate assembly and the upper side beam brace plate assembly are respectively provided with first, second and third force transmission cavities. The lower end of the third force transmission cavity is communicated with the second force transmission cavity, and the upper end penetrates through to the upper side beam assembly. The sub-frame mounting plate assembly is connected with the sub-frame, thereby reducing the Z-direction size of the cabin longitudinal beam, facilitating energy absorption in the collision and lightening. The cabin longitudinal beam, the sub-frame mounting plate assembly and the upper side beam brace plate assembly are crossed, thereby improving the rigidity and strength of the sub-frame mounting point, improving the collision safety performance and reducing the front-end collision energy absorption space.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, in particular to an upper side beam force transmission structure. BACKGROUND

[0002] At present, the subframe of an aluminum cabin longitudinal beam structure vehicle is generally arranged directly on the cabin longitudinal beam to ensure rigidity and strength. However, due to the large Z-direction height difference between the subframe mounting point and the aluminum extruded cabin longitudinal beam, one solution is to increase the Z-direction size of the cabin longitudinal beam to match the subframe mounting point, but the middle part of the cabin longitudinal beam needs to avoid the motor output shaft envelope and other arrangements, resulting in an unsmooth and heavy cabin longitudinal beam. Another solution is to increase the Z-direction cantilever of the subframe, resulting in a heavy subframe. The transmission path of the cabin longitudinal beam and the A-pillar has only one channel of the tower seat, and there is no force transmission cavity from the subframe mounting point to the upper side beam assembly, resulting in a main channel of the cabin longitudinal beam in the collision transmission path, and the dispersion path is less, so the front end energy absorption space of the cabin longitudinal beam needs to be designed to be large enough to ensure collision safety, which is not conducive to the compact cabin layout requirement. SUMMARY

[0003] One of the technical problems to be solved by the present application is to provide an upper side beam force transmission structure to solve the problem of poor crash performance of the existing upper side beam force transmission structure.

[0004] To solve the above technical problems, the present application provides an upper side beam force transmission structure, which comprises a cabin longitudinal beam, a tower seat, a subframe mounting plate assembly, an upper side beam inclined strut plate assembly, an upper side beam assembly and an A-pillar inner plate.

[0005] The cabin longitudinal beam is provided with a front-rear through first force transmission cavity;

[0006] The subframe mounting plate assembly is provided with a second force transmission cavity with an upper end opening, and the upper end of the subframe mounting plate assembly is located at the bottom of the front end of the cabin longitudinal beam and connected with the cabin longitudinal beam;

[0007] The upper side beam inclined strut plate assembly is provided with a third force transmission cavity; the lower end of the upper side beam inclined strut plate assembly is connected with the front end of the cabin longitudinal beam and the subframe mounting plate assembly, and the upper end is connected with the upper side beam assembly; the lower end of the third force transmission cavity is communicated with the second force transmission cavity, and the upper end is communicated to the front end of the upper side beam assembly;

[0008] The upper end of the tower seat is connected with the upper side beam assembly, and the lower end is connected with the cabin longitudinal beam;

[0009] The rear end of the upper side beam assembly is connected with the A-pillar inner plate.

[0010] Optionally, the upper side beam assembly is internally provided with a fourth force transmission cavity, a front end of the fourth force transmission cavity is communicated with the third force transmission cavity, a fifth force transmission cavity is arranged on the tower seat, a lower end of the fifth force transmission cavity penetrates to the cabin longitudinal beam, and an upper end of the fifth force transmission cavity penetrates to the upper side beam assembly.

[0011] Optionally, the auxiliary frame mounting plate assembly comprises an inner mounting plate and an outer mounting plate connected to the inner mounting plate, the inner mounting plate and the outer mounting plate enclose the second force transmission cavity, the inner mounting plate is connected to an inner side of the cabin longitudinal beam, the outer mounting plate is connected to an outer side of the cabin longitudinal beam, and at least one of the inner mounting plate and the outer mounting plate is further connected to a bottom side of the cabin longitudinal beam.

[0012] Optionally, the inner mounting plate comprises a first bottom plate and an inner side plate, a first front side plate and a first rear side plate connected to the first bottom plate respectively;

[0013] the outer mounting plate comprises a second bottom plate and an outer side plate, a second front side plate and a second rear side plate connected to the second bottom plate respectively;

[0014] the inner side plate is opposite to the outer side plate, the first front side plate and the second front side plate are connected, the first rear side plate and the second rear side plate are connected, and the first bottom plate is stacked with the second bottom plate;

[0015] an upper end of the inner side plate is connected to the inner side of the cabin longitudinal beam, upper ends of the first front side plate and the first rear side plate are connected to the bottom side of the cabin longitudinal beam, and upper ends of the second front side plate and the second rear side plate are connected to the outer side of the cabin longitudinal beam.

[0016] Optionally, upper ends of the first front side plate and the first rear side plate are both bent to form first flanges, and sides of the first front side plate and the first rear side plate away from the inner side plate are both bent to form second flanges;

[0017] sides of the second front side plate and the second rear side plate away from the outer side plate are bent to form third flanges;

[0018] the second flange of the first front side plate and the third flange of the second front side plate are connected, the second flange of the first rear side plate and the third flange of the second rear side plate are connected, and the first bottom plate is stacked with the second bottom plate;

[0019] an upper end of the inner side plate is connected to the inner side of the cabin longitudinal beam, the first flange is connected to the bottom side of the cabin longitudinal beam, and an upper end of the third flange is connected to the outer side of the cabin longitudinal beam.

[0020] Optionally, the sub-frame mounting plate assembly further comprises a middle stand and a threaded tube for connecting the sub-frame;

[0021] The middle stand is connected between the inner mounting plate and the outer mounting plate, and the threaded tube is arranged in the second force transmission cavity and connected to the middle stand.

[0022] Optionally, the sub-frame mounting plate assembly further comprises a middle stand and a threaded tube for connecting the sub-frame, and the middle stand comprises a third bottom plate and a stand plate;

[0023] The third bottom plate is stacked on one of the first bottom plate and the second bottom plate on the upper side;

[0024] The inner side of the stand plate is connected to the second flange on the first front side plate and the first rear side plate, and the outer side of the stand plate is connected to the third flange on the second front side plate and the second rear side plate;

[0025] The side of the threaded tube is connected to the middle stand, and the bottom of the threaded tube is connected to one of the first bottom plate and the second bottom plate on the upper side.

[0026] Optionally, the upper side beam brace plate assembly comprises an inner brace plate and an outer brace plate connected to the inner brace plate, and the inner brace plate and the outer brace plate enclose the third force transmission cavity;

[0027] The upper end of the inner brace plate is connected to the inner side of the upper side beam assembly, and the lower end is connected to the top of the cabin longitudinal beam;

[0028] The upper end of the outer brace plate is connected to the bottom side of the upper side beam assembly, and the lower end is connected to the outer side of the cabin longitudinal beam and the outer side of the sub-frame mounting plate assembly.

[0029] Optionally, the inner brace plate comprises an upper inner brace plate and a lower inner brace plate, the upper inner brace plate and the lower inner brace plate are respectively connected to the outer brace plate, and the lower end of the upper inner brace plate is overlapped with the lower end of the lower inner brace plate.

[0030] Optionally, the upper side beam assembly comprises an inner side plate and an outer side plate connected to the inner side plate, and the inner side plate and the outer side plate enclose the fourth force transmission cavity;

[0031] The inner side of the front end of the inner side plate is connected to the inner brace plate, the bottom side of the front end of the inner side plate is connected to the outer brace plate, and the rear end of the inner side plate is connected to the A-pillar inner plate.

[0032] Optionally, the upper end of the tower seat is connected to the inner side of the upper side beam inner side plate, and the lower end is connected to the outer side of the cabin longitudinal beam, and the tower seat is provided with a fifth force transmission cavity extending from the cabin longitudinal beam to the upper side beam inner side plate.

[0033] The cabin longitudinal beam, the upper side beam diagonal brace plate assembly and the tower seat are aluminum structures, and the auxiliary frame mounting plate assembly, the upper side beam assembly and the A column inner plate are steel structures.

[0034] The front longitudinal beam structure provided by the embodiment of the present application connects the auxiliary frame through the auxiliary frame mounting plate assembly, without the need to increase the Z-direction size of the cabin longitudinal beam or the cantilever height of the auxiliary frame to match the mounting points between the cabin longitudinal beam and the auxiliary frame, which is beneficial to reducing the Z-direction size of the cabin longitudinal beam, enabling the cabin longitudinal beam to avoid the motor output shaft envelope arrangement, avoiding the impact on force transmission due to the insufficient smoothness of the cabin longitudinal beam, being beneficial to collision energy absorption, improving collision safety, and being beneficial to lightweight.

[0035] In addition to the force transmission between the cabin longitudinal beam and the tower seat, a force transmission path from the auxiliary frame mounting point to the upper side beam assembly is added, the cabin longitudinal beam intersects with the auxiliary frame mounting plate assembly and the upper side beam diagonal brace plate assembly, the first force transmission cavity penetrates through the cabin longitudinal beam front and back, the third force transmission cavity penetrates downward to the cabin longitudinal beam and simultaneously communicates with the second force transmission cavity, and penetrates upward to the upper side beam assembly, thereby forming a crossed force transmission path, effectively transmitting the frontal collision force received by the cabin longitudinal beam upward to the upper A column region, and then dispersing to the upper A column, the side door and the rocker, and transmitting downward to the auxiliary frame, effectively dispersing the force received by the auxiliary frame to the cabin longitudinal beam and the A column region, improving the rigidity and strength of the auxiliary frame mounting point, improving the collision safety performance, reducing the front collision energy absorption space, being beneficial to compact cabin arrangement, and being applicable to vehicle models with compact cabin arrangement, especially short front overhang electric vehicles. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a structural schematic diagram of an upper side beam force transmission structure provided by the present application;

[0037] Figure 2 is Figure 1 is a force transmission path diagram of the upper side beam force transmission structure shown in the figure on the outside during frontal collision;

[0038] Figure 3 is Figure 1 is a force transmission path diagram of the upper side beam force transmission structure shown in the figure on the inside during frontal collision;

[0039] Figure 4 is Figure 1 is a force transmission path diagram of the upper side beam force transmission structure shown in the figure when the auxiliary frame is subjected to collision;

[0040] Figure 5 is Figure 1 is a partial structure of the upper side beam force transmission structure shown in the figureFigure 1 ;

[0041] Figure 6 is Figure 1 partial structure of the upper side beam force transmission structure shown in Figure 2 ;

[0042] Figure 7 is Figure 1 partial structure of the upper side beam force transmission structure shown in

[0043] Figure 8 is Figure 7 structure diagram of the sub-frame mounting plate assembly shown in another view;

[0044] Figure 9 is Figure 7 exploded view of the sub-frame mounting plate assembly shown in

[0045] Figure 10 is Figure 7 exploded view of the upper side beam brace plate assembly shown in

[0046] Figure 11 is Figure 7 exploded view of the upper side beam assembly shown in

[0047] The reference signs in the specification are as follows:

[0048] 1, cabin longitudinal beam; 11, first force transmission cavity;

[0049] 2, sub-frame mounting plate assembly; 21, second force transmission cavity;

[0050] 22, inner mounting plate; 221, first bottom plate; 222, inner side plate; 223, first front side plate; 224, first rear side plate; 225, first flange; 226, second flange;

[0051] 23, outer mounting plate; 231, second bottom plate; 232, outer side plate; 233, second front side plate; 234, second rear side plate; 235, third flange;

[0052] 24, middle vertical plate; 241, third bottom plate; 242, vertical plate;

[0053] 25, threaded pipe;

[0054] 3, upper side beam brace plate assembly; 31, third force transmission cavity; 32, brace inner plate; 321, upper brace inner plate; 3211, fourth flange; 322, lower brace inner plate; 3221, fifth flange; 33, brace outer plate; 331, sixth flange;

[0055] 4, upper side beam assembly; 41, upper side beam inner plate; 42, upper side beam outer plate;

[0056] 5. A pillar inner panel;

[0057] 6. A tower base; 61. A fifth force transmission cavity;

[0058] 7. A cabin longitudinal beam rear joint. DETAILED DESCRIPTION

[0059] In order to make the technical problems solved by the present application, technical solutions and beneficial effects more clearly understood, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0060] As shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the upper side beam force transmission structure provided by the embodiment of the present application comprises a cabin longitudinal beam 1, a subframe mounting plate assembly 2, an upper side beam brace plate assembly 3, an upper side beam assembly 4 and an A pillar inner panel 5.

[0061] The cabin longitudinal beam 1 is internally provided with a first force transmission cavity 11 which penetrates through front and back;

[0062] The subframe mounting plate assembly 2 is internally provided with a second force transmission cavity 21 which is open at the upper end, the upper end of the subframe mounting plate assembly 2 is located at the bottom of the front end of the cabin longitudinal beam 1 and is connected with the cabin longitudinal beam 1;

[0063] The upper side beam brace plate assembly 3 is internally provided with a third force transmission cavity 31; the lower end of the upper side beam brace plate assembly 3 is connected with the front end of the cabin longitudinal beam 1 and the subframe mounting plate assembly 2, and the upper end is connected with the upper side beam assembly 4; the lower end of the third force transmission cavity 31 is communicated with the second force transmission cavity 21, and the upper end penetrates through to the front end of the upper side beam assembly 4;

[0064] The rear end of the upper side beam assembly 4 is connected with the A pillar inner panel 5.

[0065] In use, the subframe is connected to the bottom of the subframe mounting plate assembly 2, and the rear end of the cabin longitudinal beam 1 is connected with the rocker through the cabin longitudinal beam rear joint 7.

[0066] As shown in Figure 2 and Figure 3As shown in the figure, when the engine compartment longitudinal beam 1 is subjected to a frontal collision, part of the collision force received by the engine compartment longitudinal beam 1 is transmitted backward along the engine compartment longitudinal beam 1, part of it is transmitted downward to the subframe through the subframe mounting plate assembly 2, and part of it is transmitted upward to the upper side beam diagonal brace plate assembly 3; the collision force transmitted to the upper side beam diagonal brace plate assembly 3 is transmitted obliquely upward to the upper side beam assembly 4, and part of the collision force transmitted backward along the engine compartment longitudinal beam 1 is transmitted backward to the sill, and the other part is transmitted upward to the upper side beam assembly 4 through the tower base 6; the collision force transmitted to the upper side beam assembly 4 is then transmitted to the inner panel 5 of the A pillar, and is dispersed upward to the A pillar, side door system and sill through the inner panel 5 of the A pillar.

[0067] As Figure 4 As shown in the figure, when the subframe is subjected to a collision, the collision force received by the subframe is transmitted to the engine compartment longitudinal beam 1 and the upper side beam diagonal brace plate assembly 3 through the subframe mounting plate assembly 2; the collision force transmitted to the upper side beam diagonal brace plate assembly 3 is transmitted obliquely upward to the upper side beam assembly 4, and the collision force transmitted to the engine compartment longitudinal beam 1 is dispersed forward and backward, and part of the collision force dispersed backward is transmitted backward to the sill, and the other part is transmitted upward to the upper side beam assembly 4 through the tower base 6; the collision force transmitted to the upper side beam assembly 4 is then transmitted to the inner panel 5 of the A pillar, and is dispersed upward to the A pillar, side door system and sill through the inner panel 5 of the A pillar.

[0068] The upper side beam force transmission structure provided by the embodiment of the present invention connects the subframe through the subframe mounting plate assembly 2, without increasing the Z-direction dimension of the engine compartment longitudinal beam 1 or increasing the cantilever height of the subframe to match the mounting points between the engine compartment longitudinal beam 1 and the subframe, which is beneficial to reducing the Z-direction dimension of the engine compartment longitudinal beam 1, enabling the engine compartment longitudinal beam 1 to avoid the layout of the motor output shaft envelope, etc., avoiding the influence on force transmission due to the lack of smoothness of the engine compartment longitudinal beam 1, being beneficial to collision energy absorption, improving collision safety, and being beneficial to lightweight;

[0069] In addition to the force transmission of the engine compartment longitudinal beam 1 and the tower base 6, a force transmission path from the subframe mounting point to the upper side beam assembly 4 is added. The engine compartment longitudinal beam 1 intersects with the subframe mounting plate assembly 2 and the upper side beam diagonal brace plate assembly 3. The first force transmission cavity 11 runs through the engine compartment longitudinal beam 1 from front to back, and the third force transmission cavity 31 runs downward to the engine compartment longitudinal beam 1 and is connected to the second force transmission cavity 21 at the same time, and runs upward to the upper side beam assembly 4, thus forming an intersecting force transmission path, effectively transmitting the frontal collision force received by the engine compartment longitudinal beam 1 upward to the upper A pillar area, and then dispersing it to the upper A pillar, side door and sill, and transmitting it downward to the subframe, effectively dispersing the force of the subframe to the engine compartment longitudinal beam 1 and the A pillar area, improving the stiffness and strength of the subframe mounting point, improving the collision safety performance, reducing the front-end collision energy absorption space, being beneficial to the compact engine compartment layout, applicable to models with a compact engine compartment layout, especially electric vehicles with a short front overhang.

[0070] Preferably, the cross-section of the engine compartment longitudinal beam 1 is in the shape of a Japanese character or an eye character (as Figure 7As shown), to increase the load-bearing capacity of the engine compartment longitudinal beam 1, the specific selection can be made according to the performance requirements of the corresponding vehicle model for the engine compartment longitudinal beam 1.

[0071] In one embodiment, such as Figure 1 , Figure 3 , Figure 6 , Figure 7 and Figure 11 As shown, the upper beam assembly 4 is provided with a fourth force transmission cavity, the front end of which is connected to the third force transmission cavity 31. The tower base 6 is provided with a fifth force transmission cavity 61. The lower end of the fifth force transmission cavity 61 extends to the engine compartment longitudinal beam 1, and the upper end extends to the upper beam assembly 4, increasing the force transmission path. This effectively disperses the force of the engine compartment longitudinal beam 1 and the subframe when they are impacted through the tower base 6 and the upper beam diagonal brace assembly 3 to the upper beam assembly 4, and then through the upper beam assembly 4 to the A-pillar inner panel 5. This is beneficial for collision energy absorption and improves collision safety performance.

[0072] In one embodiment, such as Figure 5 , Figure 7 , Figure 8 and Figure 9 As shown, the subframe mounting plate assembly 2 includes an inner mounting plate 22 and an outer mounting plate 23 connected to the inner mounting plate 22. The inner mounting plate 22 and the outer mounting plate 23 enclose each other to form a second force transmission cavity 21. The inner mounting plate 22 is connected to the inner side of the engine compartment longitudinal beam 1, and the outer mounting plate 23 is connected to the outer side of the engine compartment longitudinal beam 1. At least one of the inner mounting plate 22 and the outer mounting plate 23 is also connected to the bottom side of the engine compartment longitudinal beam 1.

[0073] The subframe mounting plate assembly 2 is divided into sections for easier processing. The inner mounting plate 22 and the outer mounting plate 23 are connected as one unit and are respectively connected to the inner and outer sides of the engine compartment longitudinal beam 1, and are also connected to the bottom side of the engine compartment longitudinal beam 1, which ensures the structural stability of the subframe mounting plate assembly 2 itself and the reliability of its connection with the engine compartment longitudinal beam 1.

[0074] In one embodiment, such as Figure 8 and Figure 9 As shown, the subframe mounting plate assembly 2 also includes an intermediate upright plate 24 and a threaded tube 25 for connecting the subframe;

[0075] The intermediate vertical plate 24 is connected between the inner mounting plate 22 and the outer mounting plate 23, and the threaded tube 25 is located in the second force transmission cavity 21 and connected to the intermediate vertical plate 24.

[0076] The intermediate vertical plate 24 and threaded tube 25 are designed to match the installation requirements of the subframe, ensuring the reliability of the connection between the subframe and the subframe mounting plate assembly 2.

[0077] In one embodiment, such as Figure 5 , Figure 7 , Figure 8 andFigure 9 As shown in the drawings, the inner mounting plate 22 comprises a first bottom plate 221 and an inner side plate 222, a first front side plate 223 and a first rear side plate 224 connected to the first bottom plate 221 respectively;

[0078] The outer mounting plate 23 comprises a second bottom plate 231 and an outer side plate 232, a second front side plate 233 and a second rear side plate 234 connected to the second bottom plate 231 respectively;

[0079] The inner side plate 222 is opposite to the outer side plate 232, the first front side plate 223 and the second front side plate 233 are connected, the first rear side plate 224 and the second rear side plate 234 are connected, and the first bottom plate 221 and the second bottom plate 231 are stacked;

[0080] The upper end of the inner side plate 222 is connected to the inner side of the cabin longitudinal beam 1, the upper end of the first front side plate 223 and the upper end of the first rear side plate 224 are both connected to the bottom side of the cabin longitudinal beam 1, and the upper end of the second front side plate 233 and the upper end of the second rear side plate 234 are both connected to the outer side of the cabin longitudinal beam 1.

[0081] The structure is simple, easy to process and assemble, and increases the connection reliability between the inner mounting plate 22 and the outer mounting plate 23, and the connection reliability of the inner mounting plate 22 and the outer mounting plate 23 with the cabin longitudinal beam 1. The inner cavity of the inner mounting plate 22 and the inner cavity of the outer mounting plate 23 combine to form a second force transmission cavity 21. The upper end of the inner cavity of the inner mounting plate 22 is covered by the cabin longitudinal beam 1, and the inner cavity of the outer mounting plate 23 can be upwardly communicated with a third force transmission cavity 31, which is conducive to improving the crash performance and improving the stiffness and strength of the subframe.

[0082] Preferably, as shown in the drawings, Figure 5 , Figure 7 , Figure 8 and Figure 9 The upper end of the first front side plate 223 and the upper end of the first rear side plate 224 are both bent to form a first flange 225, and the side of the first front side plate 223 away from the inner side plate 222 and the side of the first rear side plate 224 away from the inner side plate 222 are both bent to form a second flange 226;

[0083] The side of the second front side plate 233 away from the outer side plate 232 and the side of the second rear side plate 234 away from the outer side plate 232 are bent to form a third flange 235;

[0084] The second flange 226 of the first front side plate 223 and the third flange 235 of the second front side plate 233 are connected, the second flange 226 of the first rear side plate 224 and the third flange 235 of the second rear side plate 234 are connected, and the first bottom plate 221 and the second bottom plate 231 are stacked;

[0085] The upper end of the inner side plate 222 is connected to the inner side of the cabin longitudinal beam 1, the first flange 225 is connected to the bottom side of the cabin longitudinal beam 1, and the upper end of the third flange 235 is connected to the outer side of the cabin longitudinal beam 1. The first flange 225, the second flange 226, and the third flange 235 are arranged to connect the corresponding structures, increase the connection area, and increase the connection reliability. The thickness of the corresponding plate can be appropriately reduced, which is beneficial to weight reduction and cost reduction.

[0086] In an embodiment, as shown in Figure 8 and Figure 9 , the intermediate vertical plate 24 includes a third bottom plate 241 and a vertical plate 242; the third bottom plate 241 is stacked on one of the first bottom plate 221 and the second bottom plate 231 located on the upper side, that is, when the first bottom plate 221 is on the upper side, the third bottom plate 241 is stacked on the first bottom plate 221, and when the second bottom plate 231 is on the upper side, the third bottom plate 241 is stacked on the second bottom plate 231.

[0087] The inner side of the vertical plate 242 is connected to the second flange 226 on the first front side plate 223 and the first rear side plate 224, and the outer side of the vertical plate 242 is connected to the third flange 235 on the second front side plate 233 and the second rear side plate 234. The side of the threaded tube 25 is connected to the intermediate vertical plate 24, and the bottom of the threaded tube 25 is connected to one of the first bottom plate 221 and the second bottom plate 231 located on the upper side.

[0088] In this way, the connection reliability of the intermediate vertical plate 24 and the inner side mounting plate 22 and the outer side mounting plate 23 can be increased, and the connection reliability of the threaded tube 25 and the first bottom plate 221 or the second bottom plate 231 can be increased, thereby ensuring the reliability of the subframe mounting plate assembly 2 connecting the subframe.

[0089] Preferably, as shown in Figure 8 and Figure 9 , the second bottom plate 231, the first bottom plate 221, and the third bottom plate 241 are stacked, attached, and connected in sequence, which is beneficial to increase the strength of the bottom of the subframe mounting plate assembly 2.

[0090] In an embodiment, as shown in Figure 1 , Figure 5 , Figure 6 and Figure 7 , the upper side beam diagonal bracing plate assembly 3 includes a diagonal bracing inner plate 32 and a diagonal bracing outer plate 33 connected to the diagonal bracing inner plate 32, and the diagonal bracing inner plate 32 and the diagonal bracing outer plate 33 form a third force transmission cavity 31.

[0091] The upper end of the diagonal bracing inner plate 32 is connected to the inner side of the upper side beam assembly 4, and the lower end is connected to the top of the cabin longitudinal beam 1.

[0092] The upper end of the diagonal bracing outer plate 33 is connected to the bottom side of the upper side beam assembly 4, and the lower end is connected to the outer side of the cabin longitudinal beam 1 and the outer side of the subframe mounting plate assembly 2.

[0093] The structure is simple, and the connection is reliable, so that the upper side beam assembly 4 closes the upper end of the third force transmission cavity 31, the cabin longitudinal beam 1 and the auxiliary frame mounting plate assembly 2 close the lower end of the third force transmission cavity 31, and the second force transmission cavity 21 and the third force transmission cavity 31 are connected to form a closed cavity, which is beneficial to energy absorption in a collision and improves the collision safety.

[0094] Specifically, when the outer mounting plate 23 is provided, the lower end of the inclined support outer plate 33 is connected to the outer side of the cabin longitudinal beam 1 and the outer mounting plate 23.

[0095] In an embodiment, as shown in Figure 7 , the inclined support inner plate 32 includes an inclined support upper inner plate 321 and an inclined support lower inner plate 322, the inclined support upper inner plate 321 and the inclined support lower inner plate 322 are connected with the inclined support outer plate 33 respectively, and the lower end of the inclined support upper inner plate 321 is overlapped with the lower end of the inclined support lower inner plate 322. The inclined support inner plate 32 is divided into two pieces, which is convenient for processing and assembly. During assembly, the inclined support upper inner plate 321 is first connected with the inclined support outer plate 33, and then the inclined support lower inner plate 322 is connected with the inclined support upper inner plate 321 and the inclined support outer plate 33.

[0096] Preferably, as shown in Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 10 , the two sides of the inclined support upper inner plate 321 are provided with fourth flanges 3211, the two ends of the inclined support lower inner plate 322 are provided with fifth flanges 3221, and the two sides of the inclined support outer plate 33 are provided with sixth flanges 331. The fourth flanges 3211 and the fifth flanges 3221 are connected with the sixth flanges 331, and the fourth flanges 3211, the fifth flanges 3221 and the sixth flanges 331 are connected at the overlapping position of the inclined support upper inner plate 321 and the inclined support lower inner plate 322, which is beneficial to increasing the structural stability of the upper side beam inclined support plate assembly 3.

[0097] In an embodiment, as shown in Figure 1 , Figure 6 , Figure 7 and Figure 11 , the upper side beam assembly 4 includes an upper side beam inner side plate 41 and an upper side beam outer side plate 42 connected to the upper side beam inner side plate 41; the upper side beam inner side plate 41 and the upper side beam outer side plate 42 enclose a fourth force transmission cavity. It is convenient for processing and beneficial to energy absorption in a collision.

[0098] Preferably, as shown in Figure 3 , Figure 6 , Figure 7 and Figure 11 , the two sides of the inclined support upper inner plate 321 are provided with fourth flanges 3211, the two ends of the inclined support lower inner plate 322 are provided with fifth flanges 3221, and the two sides of the inclined support outer plate 33 are provided with sixth flanges 331. The fourth flanges 3211 and the fifth flanges 3221 are connected with the sixth flanges 331, and the fourth flanges 3211, the fifth flanges 3221 and the sixth flanges 331 are connected at the overlapping position of the inclined support upper inner plate 321 and the inclined support lower inner plate 322, which is beneficial to increasing the structural stability of the upper side beam inclined support plate assembly 3.As shown, the inner side of the front end of the upper side beam inner side plate 41 is connected to the inner side connecting inclined strut inner plate 32, the bottom side of the front end of the upper side beam inner side plate 41 is connected to the outer side connecting inclined strut outer plate 33, and the rear end of the upper side beam inner side plate 41 is connected to the A-pillar inner plate 5; thus, the upper side beam inner side plate 41 serves as the main force-bearing component of the upper side beam assembly 4, and the upper side beam outer side plate 42 serves as the auxiliary force-bearing component of the upper side beam assembly 4; the strength of the upper side beam inner side plate 41 is designed to be higher than that of the upper side beam outer side plate 42, which is conducive to simplifying the structure and achieving weight reduction and cost reduction under the premise of ensuring the force transmission performance.

[0099] In an embodiment, as shown in Figure 1 , Figure 3 and Figure 6 , the upper end of the tower base 6 is connected to the inner side of the upper side beam inner side plate 41, and the lower end is connected to the outer side of the cabin longitudinal beam 1, which is conducive to force transmission. Preferably, the tower base 6 is provided with a fifth force transmission cavity 61 extending from the cabin longitudinal beam 1 to the upper side beam inner side plate 41, which can further improve the crash safety. Specifically, the fifth force transmission cavity 61 can be provided with multiple force transmission cavities to increase the force transmission path.

[0100] In an embodiment, the cabin longitudinal beam 1 is an aluminum structure, preferably a "eye" shaped extruded aluminum structure (as shown in Figure 7 ), which is conducive to lightweighting and meets the crash requirements.

[0101] In an embodiment, the subframe mounting plate assembly 2 is a steel structure with higher strength. Specifically, the inner mounting plate 22, the outer mounting plate 23, and the intermediate vertical plate 24 are stamped steel plates.

[0102] Preferably, the inner mounting plate 22, the outer mounting plate 23, the intermediate vertical plate 24, and the threaded tube 25 (with corresponding structures) are point-welded to form the subframe mounting plate assembly 2.

[0103] In an embodiment, the upper side beam inclined strut plate assembly 3 is an aluminum structure, which forms a rectangular beam structure as a whole. Specifically, the inclined strut upper inner plate 321, the inclined strut lower inner plate 322, and the inclined strut outer plate 33 are stamped aluminum plate structures.

[0104] Preferably, the inclined strut upper inner plate 321, the inclined strut lower inner plate 322, and the inclined strut outer plate 33 are connected by SPR (self-punching riveting) to form the upper side beam inclined strut plate assembly 3.

[0105] In an embodiment, the upper side beam assembly 4 is a steel structure with higher strength, and preferably the upper side beam inner side plate 41 and the upper side beam outer side plate 42 are L-shaped (as shown in Figure 11 ), forming a rectangular beam structure as a whole.

[0106] Preferably, the upper side beam inner side plate 41 and the upper side beam outer side plate 42 are point-welded to form the upper side beam assembly 4.

[0107] In an embodiment, the tower seat 6 is an aluminum structure, specifically a cast aluminum alloy structure, preferably a semi-enclosed box-shaped structure (as shown in Figure 7 indicated) for mounting the front suspension and avoiding the front suspension envelope.

[0108] Specifically, the top and side of the tower seat 6 have reinforcing ribs to ensure that the tower seat 6 has sufficient strength.

[0109] In an embodiment, the A-pillar inner panel 5 is a steel structure, specifically a stamped steel plate, with an increased longitudinal size relative to the existing A-pillar inner panel 5.

[0110] In an embodiment, the subframe mounting plate assembly 2 and the upper side beam brace plate assembly 3 are respectively connected to the engine compartment longitudinal beam 1 through FDS (hot melt self-tapping), and the tower seat 6 is connected to the upper side beam assembly 4 through SPR, connected to the engine compartment longitudinal beam 1 through FDS, and connected to the engine compartment longitudinal beam 1 rear joint through bolts.

[0111] Preferably, during assembly, the subframe mounting plate assembly 2, the brace lower inner panel 322, and the engine compartment longitudinal beam 1 are connected to form an engine compartment longitudinal beam inner side assembly (as shown in Figure 5 ), the upper side beam assembly 4, the tower seat 6, the brace upper inner panel 321, and the brace outer panel 33 are connected to form an engine compartment longitudinal beam outer side assembly (as shown in Figure 6 ), and the engine compartment longitudinal beam 1 inner side assembly and the engine compartment longitudinal beam 1 outer side assembly are connected (as shown in Figure 1 ).

[0112] The preferred embodiment of the present application effectively reduces the front end energy absorption space by about 85-295 mm under the requirements of subframe stiffness and strength, collision safety C-NCAP five-star requirements, better matches the compact engine compartment layout requirements, and realizes the short front suspension pure electric vehicle styling style; the Z-direction size of the engine compartment longitudinal beam 1 is reduced by about 76-95 mm, the weight of the left and right engine compartment longitudinal beams is reduced by about 1.876-4.664 kg, the cost is reduced by about 56.28-139.92 yuan, which is conducive to lightweight improvement and cost control.

[0113] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An upper side beam force transmission structure comprising a cabin longitudinal beam and a tower seat, the cabin longitudinal beam being provided with a first force transmission cavity extending through the cabin longitudinal beam in a fore-aft direction; characterized in that, It also includes the subframe mounting plate assembly, the upper side beam diagonal brace assembly, the upper beam assembly, and the A-pillar inner panel; The subframe mounting plate assembly has a second force transmission cavity with an upper opening. The upper end of the subframe mounting plate assembly is located at the bottom of the front end of the engine compartment longitudinal beam and is connected to the engine compartment longitudinal beam. The upper side beam diagonal brace assembly is provided with a third force transmission cavity; the lower end of the upper side beam diagonal brace assembly is connected to the front end of the engine compartment longitudinal beam and the subframe mounting plate assembly, and the upper end is connected to the upper side beam assembly; the lower end of the third force transmission cavity is connected to the second force transmission cavity, and the upper end extends to the front end of the upper side beam assembly; The upper end of the tower base is connected to the upper side beam assembly, and the lower end is connected to the nacelle longitudinal beam; The rear end of the upper beam assembly is connected to the inner panel of the A-pillar; The subframe mounting plate assembly includes an inner mounting plate and an outer mounting plate connected to the inner mounting plate. The inner mounting plate and the outer mounting plate enclose each other to form the second force transmission cavity. The inner mounting plate is connected to the inner side of the engine compartment longitudinal beam, and the outer mounting plate is connected to the outer side of the engine compartment longitudinal beam. At least one of the inner mounting plate and the outer mounting plate is also connected to the bottom side of the engine compartment longitudinal beam. The top and sides of the tower base are reinforced with ribs.

2. The upper border beam force transfer structure of claim 1, wherein The upper beam assembly is provided with a fourth force transmission cavity, the front end of which is connected to the third force transmission cavity. The tower base is provided with a fifth force transmission cavity, the lower end of which extends to the nacelle longitudinal beam and the upper end of which extends to the upper beam assembly.

3. The upper border beam force transfer structure according to claim 1, wherein The inner mounting plate includes a first base plate and an inner side plate, a first front side plate, and a first rear side plate respectively connected to the first base plate; The outer mounting plate includes a second base plate and an outer plate, a second front plate, and a second rear plate respectively connected to the second base plate; The inner side plate is opposite to the outer side plate, the first front side plate and the second front side plate are connected, the first rear side plate and the second rear side plate are connected, and the first bottom plate and the second bottom plate are stacked. The upper end of the inner side plate is connected to the inner side of the cabin longitudinal beam, the upper ends of the first front side plate and the first rear side plate are both connected to the bottom side of the cabin longitudinal beam, and the upper ends of the second front side plate and the second rear side plate are both connected to the outer side of the cabin longitudinal beam.

4. The upper border beam force transfer structure according to claim 3, wherein The upper ends of the first front side plate and the first rear side plate are both bent to form a first flange, and the side of the first front side plate away from the inner side plate and the side of the first rear side plate away from the inner side plate are both bent to form a second flange. The side of the second front side plate away from the outer side plate and the side of the second rear side plate away from the outer side plate are bent to form a third flange; The second flange of the first front side plate is connected to the third flange of the second front side plate, the second flange of the first rear side plate is connected to the third flange of the second rear side plate, and the first bottom plate is stacked with the second bottom plate. The upper end of the inner side plate is connected to the inner side of the cabin longitudinal beam, the first flange is connected to the bottom side of the cabin longitudinal beam, and the upper end of the third flange is connected to the outer side of the cabin longitudinal beam.

5. The upper border beam force transfer structure according to claim 1, wherein The sub-frame mounting plate assembly further comprises a middle stand and a threaded pipe for connecting the sub-frame; The middle stand is connected between the inner mounting plate and the outer mounting plate, and the threaded pipe is arranged in the second force transmission cavity and connected to the middle stand.

6. The upper border beam force transfer structure according to claim 4, wherein The sub-frame mounting plate assembly further comprises a middle stand and a threaded pipe for connecting the sub-frame, and the middle stand comprises a third bottom plate and a stand; The third bottom plate is stacked on one of the first bottom plate and the second bottom plate on the upper side; The inner side of the stand is connected to the second flange on the first front side plate and the first rear side plate, and the outer side of the stand is connected to the third flange on the second front side plate and the second rear side plate; The side of the threaded pipe is connected to the middle stand, and the bottom of the threaded pipe is connected to one of the first bottom plate and the second bottom plate on the upper side.

7. The upper border beam force transfer structure according to claim 1, wherein The upper side beam brace plate assembly comprises a brace inner plate and a brace outer plate connected to the brace inner plate, and the brace inner plate and the brace outer plate form the third force transmission cavity; The upper end of the brace inner plate is connected to the inner side of the upper side beam assembly, and the lower end is connected to the top of the cabin longitudinal beam; The upper end of the brace outer plate is connected to the bottom side of the upper side beam assembly, and the lower end is connected to the outer side of the cabin longitudinal beam and the outer side of the sub-frame mounting plate assembly.

8. The upper border beam force transfer structure of claim 7, wherein, The brace inner plate comprises a brace upper inner plate and a brace lower inner plate, and the brace upper inner plate and the brace lower inner plate are respectively connected to the brace outer plate, and the lower end of the brace upper inner plate is overlapped with the lower end of the brace lower inner plate.

9. The upper border beam force transfer structure according to claim 7, wherein The upper side beam assembly comprises an upper side beam inner plate and an upper side beam outer plate connected to the upper side beam inner plate, and the upper side beam inner plate and the upper side beam outer plate form a fourth force transmission cavity; The inner side of the front end of the upper side beam inner plate is connected to the brace inner plate, the bottom side of the front end of the upper side beam inner plate is connected to the brace outer plate, and the rear end of the upper side beam inner plate is connected to the A-pillar inner plate.

10. The upper border beam force transfer structure according to claim 9, wherein The upper end of the tower seat is connected to the inner side of the upper side beam inner plate, and the lower end is connected to the outer side of the cabin longitudinal beam, and the tower seat is provided with a fifth force transmission cavity extending from the cabin longitudinal beam to the upper side beam inner plate; The cabin longitudinal beam, the upper side beam brace plate assembly and the tower seat are made of aluminum, and the sub-frame mounting plate assembly, the upper side beam assembly and the A-pillar inner plate are made of steel.

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