Rear seat cross beam assembly and vehicle

Abstract

The utility model provides a rear seat cross beam assembly and a vehicle. The rear seat cross beam assembly comprises a variable cross-section cross beam and a mounting piece. The cross-section-variable cross beam comprises a main body section and a connecting section. And the main body sections and the connecting sections are alternately arranged along the axis direction of the variable cross-section cross beam. And in the direction perpendicular to the variable cross-section cross beam, the connecting section protrudes out of the adjacent main body section. And the mounting piece is connected to the convex position of the connecting section. The cross-section-variable cross beam is arranged, so that the connecting section protrudes out of the main body section, the structural strength of the connecting section is improved, the connecting strength of the mounting piece and the cross-section-variable cross beam is improved, and the structural strength of the rear seat cross beam assembly is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a rear seat crossbeam assembly and a vehicle. Background Art

[0002] With the continuous development of technology, vehicles have become gradually popular. The rear seat crossbeam assembly is a key component in the vehicle seat structure, which plays the role of supporting and fixing the rear seats. At present, the crossbeam body of the rear seat crossbeam assembly is made of steel material with a single structural form. Therefore, the crossbeam body cannot be adaptively changed according to the structural form and installation requirements of the installation parts, and the installation parts are fixed to the steel material by welding. The connection strength between the installation parts and the crossbeam body is weak, which makes the structural strength of the rear seat crossbeam assembly low. Utility Model Content

[0003] The present application provides a rear seat crossbeam assembly and a vehicle with high structural strength to solve related technical problems.

[0004] The present application provides a rear seat crossbeam assembly, comprising: a variable-section crossbeam and a mounting member; the variable-section crossbeam comprises a main section and a connecting section; the main section and the connecting section are alternately arranged along the axial direction of the variable-section crossbeam; in a direction perpendicular to the variable-section crossbeam, the connecting section protrudes beyond the adjacent main section; the mounting member is connected to the protruding position of the connecting section.

[0005] By providing a variable-section crossbeam, the connecting section protrudes beyond the main section, thereby improving the structural strength of the connecting section, thereby improving the connection strength between the mounting member and the variable-section crossbeam, and improving the structural strength of the rear seat crossbeam assembly.

[0006] Furthermore, the connecting section includes a seat connecting section located at the end of the variable-section cross beam, and the mounting member includes a seat mounting box connected to the seat connecting section. By providing the seat mounting box, the rear seat cross beam assembly can support the seat using a box-shaped part, thereby improving the connection strength between the rear seat cross beam assembly and the seat.

[0007] Furthermore, the seat connection section includes a first base connected to the main body section, a first fixing portion bent from the first base, and a transition portion connecting the first base and the first fixing portion; the seat mounting box is connected to the first fixing portion. By providing the transition portion to connect the first fixing portion and the first base, the structural strength of the seat connection section is improved, and the structural strength of the rear seat cross beam assembly is further improved.

[0008] Furthermore, the mounting member further comprises a seat hook, and the seat hook is arranged on the transition portion. By arranging the seat hook, the rear seat cross beam assembly can be used to install a child seat, thereby increasing the application range of the rear seat cross beam assembly. By fixing the seat hook to the transition section, the force of the seat hook is dispersed to the first fixing portion and the first base, thereby increasing the structural strength of the seat hook.

[0009] Furthermore, the seat mounting box includes a seat mounting plate and a support plate; the support plate extends from the periphery of the seat mounting plate to the seat connecting section. The support plate is formed by extending from the periphery of the seat mounting plate, so that the periphery of the seat mounting plate is supported, thereby improving the structural strength of the seat mounting box.

[0010] Furthermore, a reinforcing plate is provided in the seat mounting box; the seat mounting plate is provided with a first mounting hole, the reinforcing plate is provided with a second mounting hole opposite to the first mounting hole, and a reinforcing sleeve is provided between the first mounting hole and the second mounting hole. By providing the reinforcing plate and the reinforcing sleeve, the structural strength of the seat mounting box is further improved.

[0011] Furthermore, the support plate includes a front surface facing away from the variable cross-section beam, and the support plate is provided with reinforcing ribs connecting the front surface and the seat connecting section. By providing the reinforcing ribs, the front surface can be continuously transitioned to the seat connecting section, further improving the structural strength of the seat mounting box.

[0012] Furthermore, the connecting section includes a hook connecting section, and the mounting member includes a seat hook; the hook connecting section protrudes beyond the adjacent main section in a direction perpendicular to the variable-section cross beam, and the seat hook is arranged at a protruding position of the hook connecting section. By arranging the seat hook, the rear seat cross beam assembly can be used to install a child seat, thereby increasing the application range of the rear seat cross beam assembly. Since the hook connecting section protrudes beyond the adjacent main section, the fixing strength of the seat hook is increased.

[0013] Furthermore, it also includes a bracket connected to the variable cross-section beam; the bracket includes a seat connection part and a body connection part; the seat connection part is provided with a seat connection hole, and the body connection part is provided with a body connection hole; the seat connection hole and the body connection hole are arranged at intervals in a direction perpendicular to the axis of the variable cross-section beam. Since the seat connection hole and the body connection hole are located in the same straight line in a direction perpendicular to the axis of the variable cross-section beam, the force of the variable cross-section beam as a whole can be evenly distributed to the seat connection hole and the body connection hole, further improving the structural strength of the rear seat cross-section beam assembly.

[0014] Furthermore, thickened protrusions are provided at the edge of the seat connection portion and around the seat connection hole, thereby improving the structural strength of the seat connection portion.

[0015] Furthermore, the seat connection portion is connected to the variable-section cross beam, and the seat connection portion is provided with a supporting rib connecting the thickened protrusion and the variable-section cross beam, thereby further improving the structural strength of the seat connection portion.

[0016] Furthermore, the body connection portion includes a base plate connected to the seat connection portion, a pair of reinforcing plates extending from two sides of the base plate perpendicular to the base plate, and a connecting plate connecting the base plate and the pair of reinforcing plates; the body connection hole is provided on the connecting plate. The body connection portion is file-shaped, and there are plates on three sides of the connecting plate for reinforcement, thereby improving the structural strength of the body connection portion.

[0017] Furthermore, it also includes a reinforcement piece; the reinforcement piece includes a plurality of reinforcement plates extending from the variable cross-section beam, and an assembly plate connecting the plurality of reinforcement plates away from one end of the variable cross-section beam, and the assembly plate is provided with a vehicle body assembly hole. By providing the reinforcement piece, the connection strength between the rear seat cross beam assembly and the vehicle body can be improved. Due to the provision of a plurality of reinforcement plates, the connection strength between the rear seat cross beam assembly and the vehicle body is further improved.

[0018] Furthermore, the reinforcement plate is provided with reinforcement ribs connected to the variable-section cross beam, thereby further improving the connection strength between the rear seat cross beam assembly and the vehicle body.

[0019] Furthermore, the rear seat cross beam assembly is integrally formed, which reduces the difficulty of manufacturing the rear seat cross beam and improves the structural strength of the rear seat cross beam assembly.

[0020] The present application also provides a vehicle, comprising the above-mentioned rear seat crossbeam assembly. Due to the high structural strength of the rear seat crossbeam assembly, the vehicle of the present application has high safety.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the specification and, together with the description, serve to explain the principles of the specification.

[0023] Figure 1 is a structural diagram of a rear seat cross beam assembly in an exemplary embodiment of the present application;

[0024] Figure 2 yes Figure 1 The structural diagram of the center and rear seat crossbeam assembly from a top-down perspective;

[0025] Figure 3 yes Figure 2A schematic cross-sectional view of the middle main body section;

[0026] Figure 4 yes Figure 2 A schematic cross-sectional view of the middle hook connection section;

[0027] Figure 5 yes Figure 1 A partial enlarged view of the middle seat mounting box;

[0028] Figure 6 yes Figure 1 A partial enlarged view of the middle seat mounting box from another viewing angle;

[0029] Figure 7 yes Figure 1 A partial enlarged view of the middle bracket;

[0030] Figure 8 yes Figure 1 A partial enlarged view of the middle bracket at another viewing angle;

[0031] Fig. 9 yes Figure 1 A partial enlarged view of the middle reinforcement.

[0032] Description of the accompanying drawings: variable-section crossbeam, 10; main body section, 11; connecting section, 12; seat connecting section, 121; first base, 1211; first fixing portion, 1212; transition portion, 1213; hook connecting section, 122; second base, 1221; second fixing portion, 1222; mounting member, 20; seat mounting box, 21; seat mounting plate, 211; first mounting hole, 2111; support plate, 212; opening, 2120; front surface, 2121; rear surface, 2122; first side surface, 2123; second side surface, 2124; reinforcement rib, 2125; reinforcing plate, 213; second mounting hole, 2131; reinforcing sleeve, 214; seat hook, 22; bracket, 30; seat connecting part, 31; seat connecting hole, 311; thickened protrusion, 312; supporting rib, 313; weight-reducing hole, 314; body connecting part, 32; body connecting hole, 321; base plate, 322; reinforcing plate, 323; connecting plate, 324; rib plate, 325; reinforcement part, 40; reinforcing plate, 41; reinforcing rib, 410; bottom plate, 411; side plate, 412; assembly plate, 42; body assembly hole, 43. DETAILED DESCRIPTION

[0033] Here, the technical solutions in the embodiments (or "implementation methods") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0034] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first" and "second" in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0035] like Figure 1 As shown, the present application provides a rear seat cross beam assembly. The rear seat cross beam assembly includes a variable cross beam 10 and a mounting member 20. The variable cross beam 10 includes a main section 11 and a connecting section 12. The main section 11 and the connecting section 12 are alternately arranged along the axial direction of the variable cross beam 10. In a direction perpendicular to the variable cross beam 10, the connecting section 12 protrudes beyond the adjacent main section 11. The mounting member 20 is connected to the protruding position of the connecting section 12.

[0036] By providing the variable-section cross beam 10, the connecting section 12 protrudes beyond the main section 11, thereby improving the structural strength of the connecting section 12, thereby improving the connection strength between the mounting member 20 and the variable-section cross beam 10, and improving the structural strength of the rear seat cross beam assembly.

[0037] The rear seat cross beam assembly is integrally formed to integrate the mounting member 20, which saves the connection manufacturing process, does not require other manufacturing tools, simplifies the manufacturing process, and reduces the manufacturing cycle. In addition, compared with the welding process, there is no risk of ablation.

[0038] Specifically, the rear seat cross beam assembly can be integrally formed through vacuum centrifugal casting, and the cross section, size and wall thickness of the variable cross section beam 10 can be adaptively modified according to the structural form of the mounting part 20, and the weak points can be precisely strengthened to improve the structural strength of the rear seat cross beam assembly.

[0039] Please also read Figure 2 As shown, the connection section 12 includes a seat connection section 121 and a hook connection section 122. The seat connection section 121 is located at the end of the variable cross-section beam 10. The hook connection section 122 is located between the two ends of the variable cross-section beam 10.

[0040] The mounting member 20 includes a seat mounting box 21 and a seat hook 22. By providing the seat mounting box 21, the rear seat cross beam assembly can support the seat using a box-shaped part, thereby improving the connection strength between the rear seat cross beam assembly and the seat. By providing the seat hook 22, the rear seat cross beam assembly can be used to install a child seat, thereby improving the application range of the rear seat cross beam assembly.

[0041] There are two seat connection sections 121, which are respectively located at the two ends of the variable cross-section beam 10. Correspondingly, there are also two seat installation boxes 21, which are respectively connected to the seat connection sections 121 at the two ends.

[0042] The seat connection section 121 includes a first base portion 1211, a first fixing portion 1212 and a transition portion 1213. The first base portion 1211 is connected to the main body section 11. The first fixing portion 1212 is formed by bending from the first base portion 1211. The transition portion 1213 connects the first base portion 1211 and the first fixing portion 1212. The seat mounting box 21 is connected to the first fixing portion 1212.

[0043] By providing the transition portion 1213 to connect the first base portion 1211 and the first fixing portion 1212, the force of the seat mounting box 21 can be dispersed through the first base portion 1211, the first fixing portion 1212 and the transition portion 1213 at the same time, thereby improving the structural strength of the seat connecting section 121 and the structural strength of the rear seat cross beam assembly. The transition portion 1213 is a protruding structure, which is formed by protruding from the first base portion 1211 and connected to the first fixing portion 1212.

[0044] Please also read Figure 3 and Figure 4 As shown, Figure 3 A schematic cross-sectional view of the main body section 11 is shown. Figure 4 The cross-sectional schematic diagram of the hook connecting section 122 is shown. In the direction perpendicular to the variable-section cross beam 10, the hook connecting section 122 protrudes beyond the adjacent main section 11. There are two hook connecting sections 122, which are spaced apart between the two ends of the variable-section cross beam 10.

[0045] The main body section 11 is in a hollow square shape. The hook connection section 122 includes a second base portion 1221 and a second fixing portion 1222. The second base portion 1221 is connected to the main body section 11, and the second fixing portion 1222 is bent to protrude beyond the adjacent main body section 11.

[0046] The number of the seat hooks 22 may be four. The two seat hooks 22 are respectively arranged on the two hook connection sections 122. The seat hooks 22 are arranged at the protruding position of the hook connection section 122. Since the hook connection section 122 protrudes beyond the adjacent main body section 11, by arranging the seat hooks 22 on the hook connection section 122, the fixing strength of the seat hooks 22 is increased, thereby improving the overall strength of the rear seat cross beam assembly.

[0047] The other two seat hooks 22 are respectively arranged at the two transition parts 1213. By arranging the seat hooks 22 at the transition parts 1213, the force of the seat hooks 22 is dispersed through the first base part 1211, the first fixing part 1212 and the transition part 1213 at the same time, thereby improving the installation strength of the seat hooks 22 and enhancing the overall structural stability of the rear seat cross beam assembly.

[0048] Please also read Figure 5 and Figure 6 As shown, the seat mounting box 21 includes a seat mounting plate 211, a support plate 212, a reinforcement plate 213 and a reinforcement sleeve 214. The support plate 212 extends from the periphery of the seat mounting plate 211 to the seat connecting section 121. Since the support plate 212 is formed by extending from the periphery of the seat mounting plate 211, the periphery of the seat mounting plate 211 is supported, thereby improving the structural strength of the seat mounting box 21.

[0049] The seat mounting plate 211 is provided with a first mounting hole 2111. The first mounting hole 2111 is used for mounting the rear seat. There are two first mounting holes 2111. The first mounting hole 2111 can be a threaded hole generated by machining, which is relatively simple to manufacture and has high rigidity and precision.

[0050] The support plate 212 includes a front surface 2121, a rear surface 2122, a first side surface 2123, and a second side surface 2124. The front surface 2121 faces away from the variable-section cross beam 10. The front surface 2121 is provided with an opening 2120 for demoulding the rear seat cross beam assembly.

[0051] The support plate 212 is provided with a reinforcing rib 2125. The reinforcing rib 2125 connects the front surface 2121 and the seat connecting section 121. The reinforcing rib 2125 is located on the first side surface 2123 and connected to the first fixing portion 1212. The reinforcing rib 2125 is provided along the side where the first side surface 2123 and the front surface 2121 are connected.

[0052] By providing the reinforcing ribs 2125, the front surface 2121 can be continuously transitioned to the seat connecting section 121, thereby improving the structural strength of the seat mounting box 21. The reinforcing ribs 2125 can support the seat mounting plate 211 together with the support plate 212. The reinforcing ribs 2125 and the rear surface 2122 have a certain inclination angle, so that the seat mounting box 21 can bear forces in multiple directions, forming a cross support, and further improving the structural strength of the seat mounting box 21.

[0053] The reinforcing plate 213 is disposed in the seat mounting box 21. The reinforcing plate 213 is disposed opposite to the seat mounting plate 211. The reinforcing plate 213 is provided with a second mounting hole 2131. The second mounting hole 2131 is disposed opposite to the first mounting hole 2111. By providing the reinforcing plate 213, a double-layer fixed structure can be formed with the seat mounting plate 211, thereby enhancing the structural stability of the seat mounting box 21.

[0054] A reinforcing sleeve 214 is provided between the first mounting hole 2111 and the second mounting hole 2131. By providing the reinforcing sleeve 214 to connect the seat mounting plate 211 and the reinforcing plate 213, the reinforcing sleeve 214 can further support the seat mounting plate 211 to improve the structural strength of the seat mounting box 21.

[0055] Please also read Figure 7 and Figure 8 As shown, the bracket 30 includes a seat connection portion 31 and a body connection portion 32. The bracket 30 is symmetrically arranged as a whole, and its symmetry plane is perpendicular to the axis of the variable cross-section beam 10, so that the force on the bracket 30 is relatively uniform, thereby improving the structural strength of the rear seat cross beam assembly.

[0056] The seat connection portion 31 is provided with a seat connection hole 311 for connecting the rotating shaft of the seat. The axis of the seat connection hole 311 is parallel to the axis of the variable-section cross beam 10 .

[0057] The seat connection part 31 is triangular, and two corners thereof are respectively connected to the variable cross-section beam 10 and the vehicle body connection part 32. The seat connection hole 311 is provided at the third corner of the seat connection part 31. The bracket 30 forms a relatively stable triangular connection structure, which improves the strength of the bracket 30 itself, thereby strengthening the structural strength of the rear seat cross beam assembly.

[0058] Thickened protrusions 312 are provided on the edge of the seat connection part 31 and around the seat connection hole 311 to improve the structural strength of the seat connection part 31, so that the connection between the seat connection part 31 and the seat shaft, the body connection part 32 and the variable-section beam 10 is more stable, thereby improving the structural strength of the rear seat beam assembly.

[0059] The seat connection hole 311 is close to the edge of the seat connection part 31 , so that the thickened protrusion 312 at the edge of the seat connection part 31 and the thickened protrusion 312 around the seat connection hole 311 form a continuous thickened structure, further improving the structural strength of the seat connection part 31 .

[0060] The seat connection part 31 is provided with support ribs 313 and weight-reducing holes 314. The support ribs 313 connect the thickened protrusions 312 and the variable-section cross beam 10 to strengthen the structure of the seat connection part 31. The seat connection part 31 is provided with weight-reducing holes 314 to achieve lightweighting of the rear seat cross beam assembly.

[0061] The seat connection part 31 is fixedly connected to the two adjacent side surfaces of the variable cross-section beam 10. The thickened protrusion 312 surrounds the seat connection part 31 and is respectively connected to the two adjacent side surfaces. The support ribs 313 extend from the intersection of the two side surfaces toward both sides and are respectively connected to the thickened protrusions 312 on both sides. The thickened protrusions 312, the support ribs 313 and the variable cross-section beam 10 form two triangular support structures, and the structural stability of the seat connection part 31 is further improved.

[0062] The vehicle body connecting portion 32 is provided with a vehicle body connecting hole 321 for connecting the vehicle body. The axis of the vehicle body connecting hole 321 is perpendicular to the axis of the variable cross-section beam 10 .

[0063] The seat connection holes 311 and the body connection holes 321 are arranged at intervals in a direction perpendicular to the axis of the variable-section cross beam 10. Since the seat connection holes 311 and the body connection holes 321 are located in the same straight line in a direction perpendicular to the axis of the variable-section cross beam 10, the force of the entire variable-section cross beam 10 can be evenly distributed to the seat connection holes 311 and the body connection holes 321, further improving the structural strength of the rear seat cross beam assembly.

[0064] The vehicle body connection portion 32 includes a base plate 322, a pair of reinforcing plates 323, a connecting plate 324, and a rib plate 325. The base plate 322 is connected to the seat connection portion 31. The pair of reinforcing plates 323 are respectively extended from the two side edges of the base plate 322 and are perpendicular to the base plate 322. The reinforcing plates 323 are triangular in shape. The connecting plate 324 connects the base plate 322 and the pair of reinforcing plates 323. The vehicle body connection hole 321 is provided on the connecting plate 324. The vehicle body connection portion 32 is in a file shape, and there are plates on three sides of the connecting plate 324 for reinforcement, thereby improving the structural strength of the vehicle body connection portion 32.

[0065] The rib plate 325 is triangular in shape and connects the thickened protrusion 312 and the base plate 322 , so as to improve the connection strength between the vehicle body connection portion 32 and the seat connection portion 31 .

[0066] Please also read Fig. 9As shown, the reinforcement member 40 includes a plurality of reinforcement plates 41 and an assembly plate 42. The plurality of reinforcement plates 41 are extended from the variable cross-section beam 10, and the assembly plate 42 connects one end of the plurality of reinforcement plates 41 away from the variable cross-section beam 10. The assembly plate 42 is provided with a vehicle body assembly hole 43.

[0067] The assembly plate 42 is connected to the vehicle body through the body assembly hole 43 to improve the installation strength of the rear seat cross beam assembly. The assembly plate 42 is supported by multiple reinforcement plates 41, which improves the structural strength and bending resistance of the reinforcement member 40 and prevents the reinforcement member 40 from tipping over or deforming under force.

[0068] The reinforcing plate 41 is provided with reinforcing ribs 410 connected to the variable cross-section beam 10 to further improve the structural strength of the reinforcing member 40. The reinforcing plate 41 includes a bottom plate 411 and a pair of side plates 412. The pair of side plates 412 extend from both sides of the bottom plate 411 perpendicular to the bottom plate 411. The reinforcing ribs 410 are provided on the side plates 412. The reinforcing ribs 410 can be cross ribs intersecting each other, and the specific type is not limited.

[0069] The present application also provides a vehicle, including the above-mentioned rear seat crossbeam assembly. Since the structural strength of the rear seat crossbeam assembly is relatively high, when the vehicle is hit, the displacement of the seat is relatively small, which can effectively protect the occupants and improve the safety of the vehicle. The vehicle of the present application can be a fuel vehicle, an electric vehicle or a hybrid vehicle, and the specific type is not limited.

[0070] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A rear seat crossbeam assembly, characterized in that: include: Variable cross-section beams and mountings; The variable-section crossbeam comprises a main section and a connecting section; the main section and the connecting section are alternately arranged along the axis direction of the variable-section crossbeam; In a direction perpendicular to the variable-section crossbeam, the connecting section protrudes beyond the adjacent main section; the mounting member is connected to the protruding position of the connecting section.

2. The rear seat cross beam assembly according to claim 1, characterized in that: The connecting section comprises a seat connecting section located at an end of the variable-section cross beam, and the mounting component comprises a seat mounting box connected to the seat connecting section.

3. The rear seat cross beam assembly according to claim 2, characterized in that: The seat connecting section comprises a first base portion connected to the main body section, a first fixing portion bent from the first base portion, and a transition portion connecting the first base portion and the first fixing portion; the seat mounting box is connected to the first fixing portion.

4. The rear seat cross beam assembly according to claim 3, characterized in that: The mounting member further comprises a seat hook, and the seat hook is arranged on the transition portion.

5. The rear seat cross beam assembly according to claim 2, characterized in that: The seat mounting box comprises a seat mounting plate and a support plate; the support plate extends from the periphery of the seat mounting plate to the seat connecting section.

6. The rear seat cross beam assembly according to claim 5, characterized in that: A reinforcing plate is arranged in the seat mounting box; the seat mounting plate is arranged with a first mounting hole, the reinforcing plate is arranged with a second mounting hole opposite to the first mounting hole, and a reinforcing sleeve is arranged between the first mounting hole and the second mounting hole.

7. The rear seat cross beam assembly according to claim 5, characterized in that: The support plate comprises a front surface facing away from the variable-section cross beam, and the support plate is provided with reinforcing ribs connecting the front surface and the seat connecting section.

8. The rear seat cross beam assembly according to claim 1, characterized in that: The connecting section includes a hook connecting section, and the mounting piece includes a seat hook; the hook connecting section protrudes beyond the adjacent main section in a direction perpendicular to the variable-section crossbeam, and the seat hook is arranged at a protruding position of the hook connecting section.

9. The rear seat cross beam assembly according to claim 1, characterized in that: Also included is a bracket connected to the variable-section crossbeam; the bracket includes a seat connection portion and a vehicle body connection portion; The seat connection portion is provided with a seat connection hole, and the body connection portion is provided with a body connection hole; the seat connection hole and the body connection hole are spaced apart in a direction perpendicular to the axis of the variable-section cross beam.

10. The rear seat cross beam assembly according to claim 9, characterized in that: Thickened protrusions are arranged on the edge of the seat connection portion and around the seat connection hole.

11. The rear seat cross beam assembly according to claim 10, characterized in that: The seat connection portion is connected to the variable-section cross beam, and the seat connection portion is provided with a supporting rib connecting the thickened protrusion and the variable-section cross beam.

12. The rear seat cross beam assembly according to claim 9, characterized in that: The vehicle body connection portion includes a base plate connected to the seat connection portion, a pair of reinforcing plates extending from both sides of the base plate perpendicular to the base plate, and a connecting plate connecting the base plate and the pair of reinforcing plates; the vehicle body connection hole is arranged on the connecting plate.

13. The rear seat cross beam assembly according to claim 1, characterized in that: It also includes a reinforcement member; the reinforcement member includes a plurality of reinforcement plates extending from the variable-section cross beam, and an assembly plate connecting the plurality of reinforcement plates away from one end of the variable-section cross beam, and the assembly plate is provided with a vehicle body assembly hole.

14. The rear seat cross beam assembly according to claim 13, characterized in that: The reinforcing plate is provided with reinforcing ribs connected to the variable-section cross beam.

15. The rear seat cross beam assembly according to claim 1, characterized in that: The rear seat crossbeam assembly is integrally formed.

16. A vehicle, characterized in that: include: A rear seat cross beam assembly as described in any one of claims 1 to 15.

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