Rear floor reinforcement structure for installing two rows of seats and vehicle

Abstract

The present application relates to a rear floor reinforcement structure and vehicle for installing two rows of seats, comprising: a vehicle chassis, the vehicle chassis including a left rear longitudinal beam assembly and a right rear longitudinal beam assembly arranged longitudinally, and a rear floor middle cross beam assembly arranged transversely and fixedly connected between the left and right rear longitudinal beam assemblies; a rear floor assembly, the rear floor assembly including a rear floor fixed above the rear floor middle cross beam assembly, and a second-row seat reinforcement beam fixed to the top of the rear floor, the second-row seat reinforcement beam being located directly above the middle of the rear floor middle cross beam assembly. The second-row seat reinforcement beam of the present application is designed on the top surface of the rear floor and is located at the rear mounting point of the second row of seats. The second-row seat reinforcement beam is welded to the rear floor to form a rear floor assembly. The rear floor middle cross beam assembly is then welded to the rear floor assembly, so that the rear floor assembly is connected to the rear floor middle cross beam assembly to form a stable structure, ensuring the structural strength of the rear mounting point of the second row of seats.

Description

Technical Field

[0001] The present application relates to the technical field of passenger vehicle chassis structures, and in particular to a rear floor reinforcement structure and a vehicle for installing two rows of seats. Background Art

[0002] With the continuous development of society and economy, people's requirements for automobiles are becoming more and more comprehensive, and more flexible configurations are favored by consumers. Seats are important safety components of automobiles. They are generally divided into two categories: integral and split. The comfort and functionality of seats are generally of great concern to consumers.

[0003] The second-row seats in conventional five-seater vehicles typically feature integrated cushions placed on the floor panel, with mounting points located on the panel and the inner beam reinforcement. Second-row seats in vehicles with more than five seats typically use a split design, connected to the vehicle body via a seat frame. This frame can be fixed, sliding, or flip. Generally speaking, split second-row seats facilitate entry and exit for third-row passengers.

[0004] The left and right mounting points for the second-row seats can be located in the rear floor longitudinal beam area, while the two center mounting points can only be located in the middle area of ​​the rear floor. Furthermore, the seatbelt anchorage points are integrated into the seats. Due to the poor rigidity of the floor structure, it is difficult to meet the second-row seat mounting point stiffness and strength requirements, as well as the local floor modal and seatbelt regulatory requirements. Summary of the Invention

[0005] The embodiments of the present application provide a rear floor reinforcement structure and a vehicle for installing two rows of seats to solve the problem in the related art that the floor structure has poor rigidity and is difficult to meet the stiffness and strength of the second row seat installation points, as well as the local modal and seat belt regulatory requirements of the floor.

[0006] A first aspect of an embodiment of the present application provides a rear floor reinforcement structure for installing a second row of seats, comprising:

[0007] A vehicle chassis, the vehicle chassis comprising a left rear longitudinal beam assembly and a right rear longitudinal beam assembly disposed longitudinally, and a rear floor middle crossbeam assembly disposed transversely and fixedly connected between the left rear longitudinal beam assembly and the right rear longitudinal beam assembly;

[0008] The rear floor assembly includes a rear floor fixed above the rear floor middle crossbeam assembly, and a second-row seat reinforcement beam fixed to the top of the rear floor, and the second-row seat reinforcement beam is located directly above the middle assembly of the rear floor middle crossbeam.

[0009] In some embodiments, the rear floor middle cross beam assembly includes a rear floor middle cross beam fixedly connected between the left rear longitudinal beam assembly and the right rear longitudinal beam assembly, the rear floor middle cross beam being a sheet metal part stamped from a steel plate, and a transverse groove with an upward opening being stamped into the top of the rear floor middle cross beam;

[0010] A left seat mounting bracket and a right seat mounting bracket that are spaced apart from each other are fixedly connected in the transverse groove, and the left seat mounting bracket and the right seat mounting bracket are both located directly below the second-row seat reinforcement beam.

[0011] In some embodiments: the left seat mounting bracket and the right seat mounting bracket are both welded to the rear floor middle cross beam, the rear floor middle cross beam is welded to the rear floor, and the rear floor is welded to the second row seat reinforcement beam.

[0012] In some embodiments, the top of the crossbeam in the rear floor is provided with a front flange folded forward and a rear flange folded backward located on both sides of the transverse groove, and the left seat mounting bracket and the right seat mounting bracket are symmetrically arranged;

[0013] The left seat mounting bracket and the right seat mounting bracket each include a bottom shell with a top opening and a closed periphery, a front lap plate connected to the front flange being provided on the front side of the bottom shell, and a rear lap plate connected to the rear flange being provided on the rear side of the bottom shell;

[0014] The left side of the bottom shell is provided with a left lap plate connected to the bottom surface of the transverse groove, the right side of the bottom shell is provided with a right lap plate connected to the bottom surface of the transverse groove, the front side of the bottom shell is provided with a front wall plate connected to the front wall surface of the transverse groove, and the rear side of the bottom shell is provided with a rear wall plate connected to the rear wall surface of the transverse groove.

[0015] In some embodiments, the left seat mounting bracket is provided with a left under-seat mounting hole penetrating the middle cross member of the rear floor, and the right seat mounting bracket is provided with a right under-seat mounting hole penetrating the middle cross member of the rear floor;

[0016] The second-row seat reinforcement beam is provided with a left seat upper mounting hole and a right seat upper mounting hole which pass through the rear floor. The left seat upper mounting hole is connected to the left seat lower mounting hole, and the right seat upper mounting hole is connected to the right seat lower mounting hole.

[0017] In some embodiments: the length direction of the second-row seat reinforcement beam is parallel to the length direction of the crossbeam assembly in the rear floor, the second-row seat reinforcement beam is a sheet metal part stamped from a steel plate, and the second-row seat reinforcement beam is stamped with an upwardly protruding left seat mounting boss and a right seat mounting boss.

[0018] In some embodiments, the left seat mounting boss and the right seat mounting boss are spaced apart from each other, and a transverse rib connecting the left seat mounting boss and the right seat mounting boss is stamped on the second-row seat reinforcement beam;

[0019] A plurality of longitudinal ribs are stamped and formed on the second-row seat reinforcement beam and are located between the left seat mounting boss and the right seat mounting boss. The plurality of longitudinal ribs are perpendicularly connected to the transverse ribs.

[0020] In some embodiments: the vehicle body chassis also includes a rear floor front cross beam assembly located in front of the rear floor middle cross beam assembly and a rear floor rear cross beam assembly located behind the rear floor middle cross beam assembly, the rear floor front cross beam assembly and the rear floor rear cross beam assembly are both arranged transversely and fixedly connected between the left rear longitudinal beam assembly and the right rear longitudinal beam assembly.

[0021] In some embodiments: the rear floor is located on top of the left rear longitudinal beam assembly, the right rear longitudinal beam assembly, the rear floor middle cross beam assembly, the rear floor front cross beam assembly and the rear floor rear cross beam assembly and are welded to each other.

[0022] A second aspect of an embodiment of the present application provides a vehicle, including:

[0023] Two rows of seats, the second row of seats including a second row of left seats and a second row of right seats, the bottoms of the second row of left seats and the second row of right seats are both equipped with side rails and inner rails that are parallel to each other and spaced apart;

[0024] And the rear floor reinforcement structure described in any of the above embodiments, the inner slide rails of the second row left seats and the second row right seats are fixed on the top of the second row seat reinforcement beam, and the side slide rails of the second row left seats and the second row right seats are respectively fixed on the left rear longitudinal beam assembly and the right rear longitudinal beam assembly.

[0025] The beneficial effects of the technical solution provided by this application include:

[0026] An embodiment of the present application provides a rear floor reinforcement structure and a vehicle for installing two rows of seats. Since the rear floor reinforcement structure for installing two rows of seats in the present application is provided with a vehicle body chassis, the vehicle body chassis includes a left rear longitudinal beam assembly and a right rear longitudinal beam assembly arranged longitudinally, and a rear floor middle cross beam assembly arranged transversely and fixedly connected between the left rear longitudinal beam assembly and the right rear longitudinal beam assembly; the rear floor assembly includes a rear floor fixed above the rear floor middle cross beam assembly, and a second row of seat reinforcement beam fixed to the top of the rear floor, and the second row of seat reinforcement beam is located directly above the middle of the rear floor middle cross beam assembly.

[0027] Therefore, the rear floor reinforcement structure for installing the second row of seats in this application includes a rear floor center crossbeam assembly at the bottom of the rear floor to support the rear floor. The two ends of the rear floor center crossbeam assembly are respectively connected to the left and right rear longitudinal beam assemblies. A second-row seat reinforcement beam is provided at the top of the rear floor, and the second-row seat reinforcement beam is located directly above the center of the rear floor center crossbeam assembly. The second-row seat reinforcement beam is designed on the top surface of the rear floor and located at the rear mounting point of the second row of seats. The second-row seat reinforcement beam is welded to the rear floor to form the rear floor assembly. The rear floor center crossbeam assembly is then welded to the rear floor assembly. In this way, the rear floor assembly and the rear floor center crossbeam assembly are connected to form a stable structure, ensuring the structural strength of the rear mounting point of the second row of seats.

[0028] The rear floor reinforcement structure for mounting the second row of seats in this application meets the installation performance requirements for second-row seats with complex functions and heavy weight. It improves the local stiffness of the second-row seat mounting points, disperses the stress of the welds near the rear mounting points of the second row of seats, and avoids the risk of weld failure. It also improves the local modal properties of the rear floor, meeting the strength requirements for the rear mounting points of second-row seats with complex functions and heavy weight. Furthermore, the second-row seat belts can be centralized on the second row of seats, meeting seat belt regulations. It also shortens the length of the second-row seat bottom rails, increasing occupant footroom in the second-row seat area. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 This is an exploded view of the rear floor reinforcement structure according to an embodiment of the present application;

[0031] Figure 2 This is a schematic diagram of a partial structure of the rear floor reinforcement structure according to an embodiment of the present application;

[0032] Figure 3 for Figure 2 Structural cross-sectional view along the AA direction;

[0033] Figure 4 A top view of the structure of the rear floor crossbeam assembly according to an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the partial structure of a vehicle according to an embodiment of the present application.

[0035] Reference numerals:

[0036] 10. Chassis; 11. Left rear longitudinal member assembly; 12. Right rear longitudinal member assembly; 13. Rear floor center cross member assembly; 14. Rear floor front cross member assembly; 15. Rear floor rear cross member assembly; 20. Rear floor assembly; 21. Rear floor; 22. Second row seat reinforcement beam; 30. Second row seat; 31. Second row left seat; 32. Second row right seat; 33. Side rails; 34. Inner rails;

[0037] 131. Rear floor center cross member; 132. Left seat mounting bracket; 133. Right seat mounting bracket; 134. Left seat lower mounting hole; 135. Right seat lower mounting hole; 136. Bottom shell; 137. Front lap plate; 138. Rear lap plate; 139. Left lap plate; 140. Right lap plate; 141. Front wall panel; 142. Rear wall panel;

[0038] 221. Left seat mounting boss; 222. Right seat mounting boss; 223. Left seat upper mounting hole; 224. Right seat upper mounting hole; 225. Transverse rib; 226. Longitudinal rib. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] An embodiment of the present application provides a rear floor reinforcement structure and vehicle for installing two rows of seats, which can solve the problem in related technologies that the floor structure has poor rigidity and is difficult to meet the stiffness and strength of the second row seat installation points, as well as the local modal and seat belt regulatory requirements of the floor.

[0041] See also Figures 1 to 3 As shown, a first aspect of an embodiment of the present application provides a rear floor reinforcement structure for installing a second row of seats, comprising:

[0042] The vehicle body chassis 10 includes a left rear longitudinal beam assembly 11 and a right rear longitudinal beam assembly 12 arranged longitudinally, the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12 being symmetrically spaced apart from each other, and a rear floor middle cross beam assembly 13 arranged transversely and fixedly connected between the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12, the two ends of the rear floor middle cross beam assembly 13 being welded to the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12 respectively.

[0043] The rear floor assembly 20 includes a rear floor panel 21 secured above the rear floor center cross member assembly 13, the left rear longitudinal member assembly 11, and the right rear longitudinal member assembly 12. A second-row seat reinforcement beam 22 is secured to the top of the rear floor panel 21. The second-row seat reinforcement beam 22 is located directly above the center of the rear floor center cross member assembly 13. Along the vehicle's Z-axis, the projection of the second-row seat reinforcement beam 22 onto the rear floor center cross member assembly 13 coincides with the center of the rear floor center cross member assembly 13.

[0044] The rear floor reinforcement structure for the second-row seats in this embodiment of the present application includes a rear floor center crossbeam assembly 13 at the bottom of the rear floor 21 to support the rear floor 21. The ends of the rear floor center crossbeam assembly 13 are connected to the left and right rear longitudinal beam assemblies 11 and 12, respectively. A second-row seat reinforcement beam 22 is located at the top of the rear floor 21, directly above the center of the rear floor center crossbeam assembly 13.

[0045] The second-row seat reinforcement beam 22 is designed on the top surface of the rear floor 21 and located at the rear mounting point of the second-row seat 30. It is welded to the rear floor 21 to form the rear floor assembly 20. The rear floor center cross member assembly 13 is further welded to the rear floor assembly 20, forming a stable structure that ensures the structural strength of the rear mounting point of the second-row seat 30. Figures 1 to 5 The X-axis direction is the length (front and back) direction of the vehicle, the Y-axis direction is the width (left and right) direction of the vehicle, and the Z-axis direction is the height (up and down) direction of the vehicle.

[0046] The rear floor reinforcement structure for mounting the second-row seats in this embodiment of the present application meets the installation performance requirements for the complex and heavy second-row seats 30. It improves the local stiffness of the rear mounting point of the second-row seats 30, disperses the stress of the welds near the rear mounting point of the second-row seats 30, and avoids the risk of weld failure. It also improves the local modal properties of the rear floor 21, meeting the strength requirements of the rear mounting point of the complex and heavy second-row seats 30.

[0047] Furthermore, in order to address the rigidity of the rear mounting points of the second-row seats 30 and meet seatbelt regulatory requirements, the prior art extends the bottom rails of the second-row seats 30 to increase mounting points. This increased rail length increases costs and reduces occupant footroom. The present invention centralizes the second-row seatbelts onto the second-row seats 30, meeting seatbelt regulatory requirements. It also shortens the bottom rails of the second-row seats 30, increasing occupant footroom in the second-row seating area.

[0048] In some alternative embodiments: See Figure 3 and Figure 4As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting a second row of seats. The rear floor center cross member assembly 13 of the rear floor reinforcement structure includes a rear floor center cross member 131 fixedly connected between the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12. The rear floor center cross member 131 is a sheet metal part stamped from steel plate. A transverse groove opening upward is stamped into the top of the rear floor center cross member 131. The transverse cross section of the rear floor center cross member 131 is an inverted "J"-shaped structure with the opening facing upward.

[0049] A left seat mounting bracket 132 and a right seat mounting bracket 133, spaced apart from each other, are fixedly connected within the transverse groove. Both the left and right seat mounting brackets 132 and 133 are located directly below the second-row seat reinforcement beam 22. In this embodiment of the present application, the left and right seat mounting brackets 132 and 133 are designed within the rear floor cross member 131. Their positions align with the mounting points of the second-row seat reinforcement beam 22.

[0050] In the lower portion of the rear floor 21, the left and right seat mounting brackets 132 and 133 are connected to the rear floor center cross member 131 to form a stable structure, ensuring the strength of the rear mounting point of the second-row seat 30. In the upper area of ​​the rear floor 21, the designed second-row seat reinforcement beam 22 further connects the left and right seat mounting brackets 132 and 133, forming a mutually interlocking connection structure. This further enhances the structural strength of the second-row seat 30's mounting point in the center of the rear floor 21 and improves the modal properties of the rear floor 21.

[0051] In some alternative embodiments: See Figure 3 and Figure 4 As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting second-row seats. The left and right seat mounting brackets 132, 133 of the rear floor reinforcement structure are welded to the rear floor center cross member 131. The rear floor center cross member 131 is welded to the rear floor 21, which in turn is welded to the second-row seat reinforcement beam 22. From top to bottom, the second-row seat reinforcement beam 22, rear floor 21, left seat mounting bracket 132, right seat mounting bracket 133, and rear floor center cross member 131 form a four-layer steel plate reinforcement structure.

[0052] The top of the rear floor cross member 131 is equipped with forward-folding front flanges and rearward-folding rear flanges on either side of the transverse groove. The left and right seat mounting brackets 132 and 133 are symmetrically arranged. Each of the left and right seat mounting brackets 132 and 133 includes a bottom shell 136 with an open top and a closed perimeter. The front side of the bottom shell 136 is equipped with a front lap plate 137 connected to the front flange, and the rear side of the bottom shell 136 is equipped with a rear lap plate 138 connected to the rear flange.

[0053] The left side of bottom shell 136 is provided with a left lap plate 139 connected to the bottom surface of the transverse groove. The right side of bottom shell 136 is provided with a right lap plate 140 connected to the bottom surface of the transverse groove. The front side of bottom shell 136 is provided with a front wall plate 141 connected to the front wall surface of the transverse groove. The rear side of bottom shell 136 is provided with a rear wall plate 142 connected to the rear wall surface of the transverse groove. The left seat mounting bracket 132 and the right seat mounting bracket 133 are both sheet metal parts formed by integrally stamping steel plate.

[0054] The left seat mounting bracket 132 and the right seat mounting bracket 133 are welded to the rear floor middle cross member 131 内部， Left seat mounting bracket 132 and right seat mounting bracket 133 自身特征面( The bottom shell 136, front lap plate 137, rear lap plate 138, left lap plate 139, right lap plate 140, front wall plate 141 and rear wall plate 142) form a "mouth"-shaped closed cavity with the rear floor center cross beam 131, which greatly improves the rigidity of the rear mounting point of the second row of seats 30 and also meets the second row seat belt regulatory test requirements.

[0055] In some alternative embodiments: See Figures 2 to 4 As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting a second row of seats. The left seat mounting bracket 132 of the rear floor reinforcement structure defines a left under-seat mounting hole 134 that extends through the rear floor center cross member 131, and the right seat mounting bracket 133 defines a right under-seat mounting hole 135 that extends through the rear floor center cross member 131. There are two left under-seat mounting holes 134 and two right under-seat mounting holes 135, which are spaced apart in front and back.

[0056] The second-row seat reinforcement beam 22 is provided with a left seat upper mounting hole 223 and a right seat upper mounting hole 224 that extend through the rear floor 21. There are two left seat upper mounting holes 223 and two right seat upper mounting holes 224, spaced apart from each other in front and back. The left seat upper mounting hole 223 communicates with the left seat lower mounting hole 134, while the right seat upper mounting hole 224 communicates with the right seat lower mounting hole 135.

[0057] In this embodiment of the present application, a left-seat upper mounting hole 223 and a right-seat upper mounting hole 224 are defined on the second-row seat reinforcement beam 22, extending through the rear floor 21. A left-seat lower mounting hole 134 is defined on the left-seat mounting bracket 132, extending through the rear floor center cross member 131. A right-seat lower mounting hole 135 is defined on the right-seat mounting bracket 133, extending through the rear floor center cross member 131. The left-seat upper mounting hole 223 and the left-seat lower mounting hole 134 are used to jointly mount the second-row left seat 31, while the right-seat upper mounting hole 224 and the right-seat lower mounting hole 135 are used to jointly mount the second-row right seat 32.

[0058] In some alternative embodiments: See Figures 1 to 3 As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting second-row seats. The length direction of the second-row seat reinforcement beam 22 of the rear floor reinforcement structure is parallel to the length direction of the rear floor cross member assembly 13. The second-row seat reinforcement beam 22 is a sheet metal part stamped from steel plate. The second-row seat reinforcement beam 22 is stamped with upwardly protruding left and right seat mounting bosses 221 and 222.

[0059] The second-row seat reinforcement beam 22 in this embodiment is a sheet metal component integrally stamped from steel. It features a left-seat mounting boss 221 for mounting the second-row left seat 31, and a right-seat mounting boss 222 for mounting the second-row right seat 32. Both the left-seat mounting boss 221 and the right-seat mounting boss 222 have flat tops. The left-seat mounting boss 221 defines a left-seat upper mounting hole 223 for connecting to the second-row left seat 31, while the right-seat mounting boss 222 defines a right-seat upper mounting hole 224 for connecting to the second-row right seat 32.

[0060] In some alternative embodiments: See Figures 1 to 3 As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting second-row seats. The left and right seat mounting bosses 221, 222 of the rear floor reinforcement structure are spaced apart from each other. A transverse rib 225 is stamped onto the second-row seat reinforcement beam 22, connecting the left and right seat mounting bosses 221, 222. Two transverse ribs 225 are provided, parallel to each other and spaced apart. These two transverse ribs 225 extend along the length of the second-row seat reinforcement beam 22 to enhance its structural strength.

[0061] The second-row seat reinforcement beam 22 is stamped with multiple longitudinal ribs 226 located between the left and right seat mounting bosses 221, 222. These ribs 226 are perpendicularly connected to the transverse ribs 225. The ribs 226 are parallel and spaced apart, extending along the width of the second-row seat reinforcement beam 22 to enhance its structural strength. The ribs 226 and the two transverse ribs 225 are interlaced to further strengthen the second-row seat reinforcement beam 22.

[0062] In some alternative embodiments: See Figure 1As shown, the embodiment of the present application provides a rear floor reinforcement structure for mounting two rows of seats. The vehicle chassis 10 of the rear floor reinforcement structure also includes a rear floor front cross-beam assembly 14 located in front of a rear floor middle cross-beam assembly 13, and a rear floor rear cross-beam assembly 15 located behind the rear floor middle cross-beam assembly 13. The rear floor front cross-beam assembly 14 and the rear floor rear cross-beam assembly 15 are both arranged transversely and fixedly connected between the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12.

[0063] The rear floor 21 is located atop and welded to the left rear longitudinal beam assembly 11, the right rear longitudinal beam assembly 12, the rear floor center crossbeam assembly 13, the rear floor front crossbeam assembly 14, and the rear floor rear crossbeam assembly 15. The rear floor 21, along with the left rear longitudinal beam assembly 11, the right rear longitudinal beam assembly 12, the rear floor center crossbeam assembly 13, the rear floor front crossbeam assembly 14, and the rear floor rear crossbeam assembly 15, forms the rear floor beam structure. This provides strength support for the installation of the vehicle's second-row seats 30 and ensures the structural stability of the rear floor 21.

[0064] See also Figure 5 As shown, a second aspect of an embodiment of the present application provides a vehicle, comprising:

[0065] The second row of seats 30 includes a second-row left seat 31 and a second-row right seat 32. The left and right seats 31 and 32 are spaced apart in the width direction of the vehicle, with a pedestrian aisle between them. Parallel and spaced side rails 33 and inner rails 34 are mounted on the bottoms of the left and right seats 31 and 32. The side rails 33 intersect with the inner rails 34, proximate to the second-row seat reinforcement beam 22.

[0066] As with the rear floor reinforcement structure described in any of the above embodiments, the inner rails 34 of the second-row left seat 31 and the second-row right seat 32 are both fixed to the top of the second-row seat reinforcement beam 22. The inner rails 34 of the second-row left seat 31 are fixed to the left seat mounting boss 221, and the inner rails 34 of the second-row right seat 32 are fixed to the right seat mounting boss 222. The side rails 33 of the second-row left seat 31 and the second-row right seat 32 are respectively fixed to the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12.

[0067] How it works

[0068] An embodiment of the present application provides a rear floor reinforcement structure and a vehicle for installing two rows of seats. Since the rear floor reinforcement structure for installing two rows of seats in the present application is provided with a vehicle body chassis 10, the vehicle body chassis 10 includes a left rear longitudinal beam assembly 11 and a right rear longitudinal beam assembly 12 arranged longitudinally, and a rear floor middle cross beam assembly 13 arranged transversely and fixedly connected between the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12; a rear floor assembly 20, the rear floor assembly 20 includes a rear floor 21 fixed above the rear floor middle cross beam assembly 13, and a second row of seat reinforcement beam 22 fixed to the top of the rear floor 21, and the second row of seat reinforcement beam 22 is located directly above the middle of the rear floor middle cross beam assembly 13.

[0069] Therefore, the rear floor reinforcement structure for installing the second row of seats in this application includes a rear floor center crossbeam assembly 13 at the bottom of the rear floor 21 to support the rear floor 21. The two ends of the rear floor center crossbeam assembly 13 are connected to the left rear longitudinal beam assembly 11 and the right rear longitudinal beam assembly 12, respectively. A second-row seat reinforcement beam 22 is located at the top of the rear floor 21, directly above the center of the rear floor center crossbeam assembly 13. The second-row seat reinforcement beam 22 is designed on the top surface of the rear floor 21 and located at the rear mounting point of the second row of seats 30. The second-row seat reinforcement beam 22 is welded to the rear floor 21 to form the rear floor assembly 20. The rear floor center crossbeam assembly 13 is then welded to the rear floor assembly 20. This connection between the rear floor assembly 20 and the rear floor center crossbeam assembly 13 creates a stable structure, ensuring the structural strength of the rear mounting point of the second row of seats 30.

[0070] The rear floor reinforcement structure for mounting the second-row seats in this application meets the performance requirements for the installation of the complex and heavy second-row seats 30. It improves the local stiffness of the second-row seat's rear mounting point, dissipates stress in welds near the rear mounting point, and mitigates the risk of weld failure. It also enhances the local modal properties of the rear floor, meeting the requirements for the rear mounting point strength of the complex and heavy second-row seats. Furthermore, the second-row seat belts can be centrally located on the second-row seats, meeting seat belt regulations. It also shortens the bottom rail length of the second-row seats 30, increasing occupant footroom in the second-row seat 30 area.

[0071] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0072] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0073] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A rear floor reinforcement structure for installing a second row of seats, characterized in that: include: A vehicle chassis (10), the vehicle chassis (10) comprising a left rear longitudinal beam assembly (11) and a right rear longitudinal beam assembly (12) arranged longitudinally, and a rear floor middle cross beam assembly (13) arranged transversely and fixedly connected between the left rear longitudinal beam assembly (11) and the right rear longitudinal beam assembly (12); A rear floor assembly (20), the rear floor assembly (20) comprising a rear floor (21) fixed above the rear floor middle crossbeam assembly (13), and a second-row seat reinforcement beam (22) fixed to the top of the rear floor (21), the second-row seat reinforcement beam (22) being located directly above the middle of the rear floor middle crossbeam assembly (13); The rear floor middle cross beam assembly (13) comprises a rear floor middle cross beam (131) fixedly connected between the left rear longitudinal beam assembly (11) and the right rear longitudinal beam assembly (12), wherein a transverse groove with an opening facing upward is formed by punching a top portion of the rear floor middle cross beam (131); A left seat mounting bracket (132) and a right seat mounting bracket (133) spaced apart from each other are fixedly connected in the transverse groove, and the left seat mounting bracket (132) and the right seat mounting bracket (133) are both located directly below the second-row seat reinforcement beam (22); The top of the crossbeam (131) in the rear floor is provided with a front flange folded forward and a rear flange folded backward located on both sides of the transverse groove, and the left seat mounting bracket (132) and the right seat mounting bracket (133) are symmetrically arranged; The left seat mounting bracket (132) and the right seat mounting bracket (133) both include a bottom shell (136) with a top opening and a closed periphery. The front side of the bottom shell (136) is provided with a front lap plate (137) connected to the front flange, and the rear side of the bottom shell (136) is provided with a rear lap plate (138) connected to the rear flange. A left lap plate (139) connected to the bottom surface of the transverse groove is provided on the left side of the bottom shell (136), a right lap plate (140) connected to the bottom surface of the transverse groove is provided on the right side of the bottom shell (136), a front wall plate (141) connected to the front wall surface of the transverse groove is provided on the front side of the bottom shell (136), and a rear wall plate (142) connected to the rear wall surface of the transverse groove is provided on the rear side of the bottom shell (136).

2. The rear floor reinforcement structure for installing a second row of seats according to claim 1, characterized in that: The rear floor middle crossbeam (131) is a sheet metal part formed by stamping a steel plate.

3. The rear floor reinforcement structure for installing a second row of seats according to claim 1, characterized in that: The left seat mounting bracket (132) and the right seat mounting bracket (133) are both welded to the rear floor middle cross beam (131), the rear floor middle cross beam (131) is welded to the rear floor (21), and the rear floor (21) is welded to the second row seat reinforcement beam (22).

4. The rear floor reinforcement structure for installing a second row of seats according to claim 1, characterized in that: The left seat mounting bracket (132) is provided with a left seat lower mounting hole (134) penetrating the rear floor middle crossbeam (131), and the right seat mounting bracket (133) is provided with a right seat lower mounting hole (135) penetrating the rear floor middle crossbeam (131); The second-row seat reinforcement beam (22) is provided with a left seat upper mounting hole (223) and a right seat upper mounting hole (224) which pass through the rear floor (21); the left seat upper mounting hole (223) and the left seat lower mounting hole (134) are communicated with each other, and the right seat upper mounting hole (224) and the right seat lower mounting hole (135) are communicated with each other.

5. The rear floor reinforcement structure for installing a second row of seats according to claim 1, characterized in that: The length direction of the second-row seat reinforcement beam (22) is parallel to the length direction of the crossbeam assembly (13) in the rear floor. The second-row seat reinforcement beam (22) is a sheet metal part formed by integrally stamping a steel plate. The second-row seat reinforcement beam (22) is stamped with an upwardly protruding left seat mounting boss (221) and a right seat mounting boss (222).

6. The rear floor reinforcement structure for installing a second row of seats according to claim 5, characterized in that: The left seat mounting boss (221) and the right seat mounting boss (222) are spaced apart from each other, and a transverse rib (225) connecting the left seat mounting boss (221) and the right seat mounting boss (222) is stamped on the second-row seat reinforcement beam (22); A plurality of longitudinal ribs (226) are stamped and formed on the second-row seat reinforcement beam (22) and are located between the left seat mounting boss (221) and the right seat mounting boss (222). The plurality of longitudinal ribs (226) and the transverse ribs (225) are vertically connected to each other.

7. The rear floor reinforcement structure for installing a second row of seats according to claim 1, characterized in that: The vehicle chassis (10) further comprises a rear floor front cross beam assembly (14) located in front of the rear floor middle cross beam assembly (13) and a rear floor rear cross beam assembly (15) located in rear of the rear floor middle cross beam assembly (13), wherein the rear floor front cross beam assembly (14) and the rear floor rear cross beam assembly (15) are both arranged transversely and fixedly connected between the left rear longitudinal beam assembly (11) and the right rear longitudinal beam assembly (12).

8. The rear floor reinforcement structure for installing a second row of seats according to claim 7, characterized in that: The rear floor (21) is located on top of the left rear longitudinal beam assembly (11), the right rear longitudinal beam assembly (12), the rear floor middle cross beam assembly (13), the rear floor front cross beam assembly (14) and the rear floor rear cross beam assembly (15) and are welded to each other.

9. A vehicle, characterized in that: include: Two rows of seats (30), the two rows of seats (30) comprising a second row of left seats (31) and a second row of right seats (32), the bottoms of the two rows of left seats (31) and the two rows of right seats (32) being both provided with side rails (33) and inner rails (34) that are parallel to each other and spaced apart; And the rear floor reinforcement structure according to any one of claims 1 to 8, wherein the inner slide rails (34) of the second row of left seats (31) and the second row of right seats (32) are fixed to the top of the second row of seat reinforcement beams (22), and the side slide rails (33) of the second row of left seats (31) and the second row of right seats (32) are respectively fixed to the left rear longitudinal beam assembly (11) and the right rear longitudinal beam assembly (12).

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