A body floor unit for a non-load-bearing body and a vehicle having the same

Abstract

The application relates to the field of vehicle bodies, in particular to a non-load-bearing vehicle body floor unit and a vehicle with the same, which comprises a floor frame assembly, a floor panel assembly and a seat frame assembly; the floor panel assembly and the seat frame assembly are connected to the floor frame assembly; the end of the floor panel assembly is connected to the floor frame assembly through the seat frame assembly; the floor panel assembly comprises a front floor; the seat frame assembly comprises a seat frame edge plate structure and a seat cross beam structure; the seat frame edge plate structure and the seat cross beam structure form a ring structure; the vehicle body floor unit disclosed by the application can guarantee the structural strength of the vehicle body floor unit through the cooperation of the floor frame assembly, the floor panel assembly and the seat frame assembly.

Description

Technical Field

[0001] This invention relates to the field of vehicle bodies, and more specifically to a non-load-bearing vehicle body floor unit and a vehicle having the vehicle body floor unit. Background Technology

[0002] In the commercial vehicle sector, especially in mini-trucks and pickup trucks, non-load-bearing bodies are widely used due to their advantages such as strong load-bearing capacity, stable structure, and ease of modification.

[0003] In this type of vehicle, the body and chassis frame are separate, and the load is mainly borne by an independent high-strength floor frame.

[0004] In traditional designs, a prominent "central tunnel" structure is usually designed in the middle of the front floor of the cab to accommodate chassis mechanical components such as drive shafts and exhaust pipes.

[0005] The presence of this central aisle severely encroaches on the driver's foot and leg space, creating a physical partition between the driver and passenger seats. This not only results in poor passenger comfort but also makes it extremely inconvenient for people to move around inside the vehicle, especially when parking in a tight space or needing to retrieve items from one side, significantly reducing convenience.

[0006] With the development of automotive technology, especially electrification, more "three-electric" system components such as battery packs and motor controllers need to be arranged under the chassis, which puts forward more stringent requirements on the spatial layout of the cab and the integration of the body structure.

[0007] While existing technologies have explored "flat floor" structures, they often simply eliminate the central tunnel without systematically addressing the resulting decrease in vehicle body rigidity and strength. Eliminating the central tunnel weakens the critical longitudinal force transmission path of the vehicle body, potentially leading to floor depressions and flutter during long-term use, and significantly reducing the overall torsional and bending rigidity of the vehicle, thus affecting its handling stability, safety, and NVH performance.

[0008] In addition, traditional non-load-bearing bodies typically have seats mounted directly on the floor panel or simple brackets. The mounting points lack rigidity and strength, making it difficult to effectively resist complex loads from occupants and seats, resulting in long-term reliability and collision safety risks.

[0009] The existing patent CN201646861U - A non-load-bearing mini truck body reinforcement structure does not explicitly disclose a technical solution to the above-mentioned technical problems.

[0010] Therefore, in order to improve or solve at least one of the above-mentioned technical problems, it is necessary to optimize the design of the existing vehicle floor structure. Summary of the Invention

[0011] The purpose of this invention is to provide a vehicle floor unit suitable for non-load-bearing vehicle bodies, with high structural strength and no central tunnel structure.

[0012] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0013] A non-load-bearing body floor unit includes a floor frame assembly, a floor panel assembly, and a seat frame assembly;

[0014] The floor panel assembly and the seat frame assembly are connected to the floor frame assembly;

[0015] The end of the floor panel assembly is connected to the floor frame assembly via the seat frame assembly;

[0016] The floor panel assembly includes a front floor;

[0017] The seat frame assembly includes a seat frame side plate structure and a seat crossbeam structure; the seat frame side plate structure and the seat crossbeam structure form a ring structure.

[0018] The seat frame side panel structure includes a seat frame front panel; both ends of the seat frame front panel are connected to the seat crossbeam structure via a seat frame left side panel and a seat frame right side panel, respectively.

[0019] The front panel of the seat frame and the seat crossbeam structure are spaced apart; the horizontal projection of the side panel structure of the seat frame is C-shaped, and the side of the front panel of the seat frame near the front of the vehicle is flat.

[0020] The seat crossbeam structure includes a rear seat crossbeam and an upper seat crossbeam;

[0021] The rear crossbeam of the seat is connected to the floor frame assembly;

[0022] The seat frame side panel structure overlaps on the rear crossbeam of the seat;

[0023] The rear crossbeam of the seat includes a crossbeam base plate; a front side plate and a rear side plate are respectively provided on opposite sides of the crossbeam base plate; an overlapping connecting plate is provided at the end of the front side plate and the rear side plate away from the crossbeam base plate.

[0024] The upper crossbeam of the seat overlaps the rear crossbeam of the seat.

[0025] The seat crossbeam structure also includes a support unit; the support unit includes at least one support plate; the support plate is connected to both the upper crossbeam and the rear crossbeam of the seat.

[0026] The upper crossbeam and the rear crossbeam of the seat form an assembly cavity; the support unit is arranged in the assembly cavity.

[0027] The floor frame assembly includes two spaced longitudinal beam units; one end of the two longitudinal beam units is connected by a front bumper crossbeam, and the other end is connected by a rear seat crossbeam; the two longitudinal beam units are also connected by a reinforcing unit, which includes a front floor reinforcing crossbeam and a rear floor reinforcing crossbeam.

[0028] The two ends of the front reinforcing beam of the floor are respectively connected to the longitudinal beam unit by a beam connecting plate.

[0029] Each of the longitudinal beam units includes a longitudinal beam body, which includes a rear longitudinal beam and a front longitudinal beam; the front longitudinal beam is provided with a collapsible groove.

[0030] The front longitudinal beam and the rear longitudinal beam are arranged to intersect; the height of the end of the front longitudinal beam closer to the rear longitudinal beam from the horizontal plane is lower than the height of the end of the front longitudinal beam farther from the rear longitudinal beam from the horizontal plane.

[0031] The longitudinal beam body has a front cover plate at one end and a rear cover plate at the other end; the seat frame side plate structure is connected to the longitudinal beam body through the rear cover plate; the longitudinal beam body is connected to the rear crossbeam of the seat through a longitudinal beam connecting plate.

[0032] A vehicle includes a body floor unit for a non-load-bearing body; the body floor unit is connected to a vehicle frame.

[0033] The advantages of this invention are:

[0034] This invention discloses a non-load-bearing body floor unit and a vehicle having the body floor unit.

[0035] The vehicle floor unit disclosed in this invention, through the coordinated use of the floor frame assembly, the floor panel assembly, and the seat frame assembly, can ensure the structural strength of the vehicle floor unit.

[0036] In addition, the seat frame front panel disclosed in this invention is arranged along the Y direction of the whole vehicle; and the front side of the seat frame front panel is flat to avoid the seat frame front panel protruding and affecting the passenger seating space; at the same time, the front floor disclosed in this invention does not have a central tunnel, which makes it convenient for the driver and passenger to move the driver and passenger seats when parking. Attached Figure Description

[0037] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0038] Figure 1 This is a front view of the vehicle floor structure of the present invention.

[0039] Figure 2 for Figure 1 Rear view.

[0040] Figure 3 This is an exploded view of the vehicle's floor structure.

[0041] Figure 4 This is a schematic diagram of the vehicle body floor panel structure.

[0042] Figure 5 This is a schematic diagram of the vehicle body floor frame structure.

[0043] Figure 6 This is a schematic diagram of the front structure of the longitudinal beam.

[0044] Figure 7 for Figure 1 AA sectional view.

[0045] Figure 8 This is a partial structural diagram of the front end of the vehicle body floor unit of the present invention when it is arranged on the vehicle frame.

[0046] Figure 9 This is a partial structural diagram of the rear end of the vehicle body floor unit of the present invention when it is arranged on the vehicle frame.

[0047] Figure 10 This is a schematic diagram of the structure when the left rear longitudinal beam connecting plate, the rear longitudinal beam connecting plate reinforcing plate, and the seat crossbeam structure are connected.

[0048] In the attached diagram: 100, floor panel assembly; 200, right wheel arch and longitudinal beam connection plate; 300, left wheel arch and longitudinal beam connection plate; 400, floor frame assembly; 500, seat upper crossbeam.

[0049] 101. Front floor; 102. Left front wheel cover; 103. Left side panel of seat frame; 104. Front panel of seat frame; 105. Right side panel of seat frame; 106. Right front wheel cover.

[0050] 401. Front bumper crossbeam; 402. Front cover plate of longitudinal beam; 403. Left longitudinal beam; 404. Left mounting reinforcement plate of front suspension; 405. Left crossbeam connecting plate of floor; 406. Left front sill sealing plate; 407. Left support plate of longitudinal beam sill; 408. Rear cover plate of longitudinal beam; 409. Left rear longitudinal beam connecting plate; 410. Rear longitudinal beam connecting plate reinforcement plate; 411. Support plate; 412. Rear crossbeam of seat; 413. Rear longitudinal beam connecting plate reinforcement plate; 419. Rear reinforcing crossbeam of floor; 420. Right longitudinal beam; 421. Right crossbeam connecting plate of floor; 422. Front reinforcing crossbeam of floor. Detailed Implementation

[0051] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0052] A non-load-bearing vehicle body floor unit includes a floor frame assembly 400, a floor panel assembly 100, and a seat frame assembly. The floor panel assembly 100 and the seat frame assembly are connected to the floor frame assembly 400. The end of the floor panel assembly 100 is connected to the floor frame assembly 400 via the seat frame assembly. The floor panel assembly 100 includes a front floor 101. The seat frame assembly includes a seat frame side plate structure and a seat crossbeam structure. The seat frame side plate structure and the seat crossbeam structure form a ring structure. The vehicle body floor unit disclosed in this invention, through the coordinated use of the floor frame assembly 400, the floor panel assembly 100, and the seat frame assembly, can ensure the structural strength of the vehicle body floor unit.

[0053] Specifically, in this invention, the floor frame assembly 400 serves as the foundation of the vehicle body floor and typically consists of two longitudinal beams and several transverse beams, directly connected to the main frame 600.

[0054] The seat frame assembly is a ring structure, which is formed by the seat frame side plate structure and the seat crossbeam structure; the seat frame assembly is mounted on the floor frame assembly 400.

[0055] Seat frames always provide a robust mounting base for car seats.

[0056] The seat frame assembly acts as a connecting bridge: as an intermediate support structure, it connects the floor panel assembly 100 to the bottom floor frame.

[0057] The floor panel assembly 100 is a flat floor that the driver and passengers come into direct contact with.

[0058] The floor panel assembly 100 overlaps the floor frame assembly 400.

[0059] In this invention, the floor panel assembly 100 and the seat frame assembly are simultaneously mounted on the floor frame assembly 400.

[0060] The ring-shaped seat frame forms a very robust structure that effectively resists forces from the seat and occupants, and enhances the torsional rigidity of the entire cab.

[0061] Seat mounting points, seat belt anchor points, and other components can all be integrated into this robust ring structure, resulting in better safety and reliability.

[0062] Furthermore, the seat frame side panel structure described in this invention includes a seat frame front panel 104; both ends of the seat frame front panel 104 are connected to the seat crossbeam structure via a seat frame left side panel 103 and a seat frame right side panel 105, respectively; the seat frame front panel 104, seat frame left side panel 103, and seat frame right side panel 105 are arranged longitudinally on the floor frame assembly 400; the seat frame front panel 104, seat frame left side panel 103, and seat frame right side panel 105 provide excellent support and height; facilitate the formation of storage space under the seat frame assembly, and facilitate the subsequent placement of electrical components and other parts.

[0063] In this invention, the front seat frame 104 is located on the front side of the vehicle, the left seat frame 103 and the right seat frame 105 are arranged along the X direction of the vehicle, and the seat crossbeam structure is located on the floor frame assembly 400 near the rear of the vehicle; the front seat frame 104 and the seat crossbeam structure are spaced apart; based on the arrangement that the two ends of the front seat frame 104 are connected to the seat crossbeam structure through the left seat frame 103 and the right seat frame 105 respectively, the seat frame assembly disclosed in this invention becomes a ring frame structure, ensuring the structural strength of the seat frame assembly. In addition, in this invention, the seat frame assembly is arranged along the Z direction on the floor frame assembly 400, which plays a good supporting and raising role. In subsequent use, the car seat is placed on the seat frame assembly.

[0064] Furthermore, in this invention, the seat frame front panel 104 and the seat crossbeam structure are spaced apart; the horizontal projection of the seat frame side panel structure is C-shaped, and the side of the seat frame front panel 104 near the front of the vehicle is flat; in this invention, the "spaced distribution" of the seat frame front panel 104 and the seat crossbeam structure forms an open ring structure, which is equivalent to creating a space under the seat: facilitating the arrangement of electrical components or other automotive parts under the seat frame assembly; and optimizing the overall vehicle space layout.

[0065] In addition, the front panel 104 of the seat frame, the left side panel 103 of the seat frame, the right side panel and the seat crossbeam structure of the present invention are essentially forming a box structure, which can ensure the structural strength of the vehicle seat area, while also ensuring the overall structural strength of the vehicle floor unit.

[0066] The horizontal projection of the seat frame side panel structure is "C-shaped"; the C-shaped structure is a very efficient design in engineering, which uses the least amount of material to form a frame that combines strength and rigidity; making the seat frame side panel structure better able to withstand the vertical pressure from the seat and the forces from all directions of impact.

[0067] The side of the front seat panel 104 near the front of the vehicle is "flat". Here, "flat" does not mean that the front side of the front seat panel 104 is a flat surface, but rather that the front side of the front seat panel 104 is a smooth surface. The purpose is to avoid the front seat panel 104 from protruding, thus avoiding the traditional front seat panel 104 having a protrusion that separates the driver's seat from the passenger seat. At the same time, the absence of a protrusion in the front seat panel 104 can optimize legroom for passengers.

[0068] In contrast to the "conventional structure" in this invention: conventional vehicles, due to the need to arrange the driveshaft channel (center channel), usually have a large, downward-facing bulge in the center of the front seat panel 104 or floor.

[0069] This invention essentially eliminates the need for a central channel design.

[0070] Furthermore, the seat crossbeam structure described in this invention is arranged at the rear of the floor frame assembly 400, which can work with the front bumper crossbeam 401 to form a ring frame structure for the floor frame assembly 400, ensuring the structural strength of the floor frame assembly 400, and to a certain extent also ensuring the structural strength of the vehicle floor unit.

[0071] In this invention, the seat crossbeam structure includes a rear seat crossbeam 412 and an upper seat crossbeam 500. The upper seat crossbeam 500 covers the rear seat crossbeam 412. Through the stacking arrangement of the rear seat crossbeam 412 and the upper seat crossbeam 500, the structural strength of the seat crossbeam structure is better guaranteed.

[0072] In this invention, the rear seat crossbeam 412 is connected to the floor frame assembly 400; based on this arrangement, the rear seat crossbeam 412 acts as a connecting beam at the tail of two longitudinal beam units.

[0073] The seat frame side panel structure overlaps with the rear crossbeam 412 of the seat. This arrangement facilitates the calibration of the relative position between the seat frame side panel structure and the rear crossbeam 412 of the seat. In actual use, the main components are the protruding plates on the left side panel 103 and the right side panel 105 of the seat frame, which overlap with the rear crossbeam 412 of the seat through the protruding plates. At the same time, since the upper crossbeam 500 of the seat is essentially upside down on the rear crossbeam 412 of the seat, the upper crossbeam 500 of the seat can also bind and compress the ends of the seat frame side panel structure.

[0074] In this invention, the rear crossbeam 412 of the seat includes a crossbeam base plate 4121; the crossbeam base plate 4121 is provided with a front side plate 4123 and a rear side plate 4122 on opposite sides; the front side plate 4123 and the rear side plate 4122 are provided with an overlapping connecting plate 4124 at the end away from the crossbeam base plate 4121; in this invention, the rear crossbeam 412 of the seat has an inverted V-shaped structure. This arrangement makes the seat crossbeam structure a box structure after the upper crossbeam 500 of the seat overlaps on the rear crossbeam 412; this arrangement makes the seat crossbeam structure have extremely high torsional stiffness: the closed cavity performs well when subjected to torque, which can greatly improve the torsional deformation resistance of the vehicle body, making the vehicle feel more "solid" and with fewer abnormal noises; at the same time, it provides strong local stiffness: providing a rock-solid installation base for the seat or seat belt fixing point.

[0075] In a collision, this cavity structure can effectively disperse and transfer forces throughout the floor frame, protecting the occupant compartment.

[0076] This invention designs the rear crossbeam 412 of the seat as a complex cross-section component with multiple flanges and overlapping platforms, and connects it to the upper crossbeam 500 of the seat and the seat frame side plate structure through an "overlapping" method. This invention successfully constructs a high-strength, high-rigidity multi-layered cavity structure. This is not only the mounting point of the seat, but also a crucial rigid node in the entire vehicle floor unit.

[0077] Furthermore, the seat crossbeam structure in this invention also includes a support unit; the support unit includes at least one support plate 411; the support plate 411 is connected to both the upper seat crossbeam 500 and the rear seat crossbeam 412; the upper seat crossbeam 500 and the rear seat crossbeam 412 form an assembly cavity 4-3; the support unit is arranged in the assembly cavity 4-3; in this invention, the support unit acts as a support reinforcement, ensuring the stability of the connection between the upper seat crossbeam 500 and the rear seat crossbeam 412, while also ensuring the connection strength between them; in actual design, this invention requires multiple support plates 411 to be arranged at intervals in the assembly cavity 4-3, with the upper end of the support plate 411 fitting against the inner wall of the upper seat crossbeam 500; the lower edge of the support plate 411 fitting against the inner wall of the rear seat crossbeam 412, so that the support plate 411 acts as both a support and a reinforcement; preventing the seat crossbeam structure from collapsing when the seat is installed on it.

[0078] Without the support plate 411, the upper crossbeam 500 and the rear crossbeam 412 of the seat are mainly connected by the edge, and their ability to work together is limited. However, when the support plate 411 is installed, the support plate 411 rigidly connects the two together internally, forcing them to deform together when under stress, and resist the load as a whole. This significantly improves the overall bending stiffness and torsional stiffness of the entire crossbeam assembly.

[0079] Furthermore, in the present invention, the floor frame assembly <400> includes two longitudinally spaced beam units; one end of the two longitudinally beam units is connected by a front bumper cross beam <401>, and the other end is connected by a rear seat cross beam <412>; based on this design, the floor frame assembly <400> forms a closed ring frame, ensuring the integrity of the floor frame assembly <400>.

[0080] In addition, in the present invention, the two longitudinally beam units are also connected by a strengthening unit, and the strengthening unit includes a front floor strengthening cross beam <422> and a rear floor strengthening cross beam <419>; in the present invention, by adding the front floor strengthening cross beam <422> and the rear floor strengthening cross beam <419>, the horizontal projection of the floor frame assembly <400> is in a "mu" shape, better ensuring the structural strength of the floor frame assembly <400>.

[0081] Meanwhile, in the present invention, while the front floor strengthening cross beam <422> and the rear floor strengthening cross beam <419> increase the strength of the floor frame assembly <400>, the front floor strengthening cross beam <422> and the rear floor strengthening cross beam <419> can also longitudinally support the floor panel assembly <100>, ensuring the strength of the floor panel assembly <100> and preventing deformation of the floor panel assembly <100>.

[0082] Furthermore, in the present invention, both ends of the front floor strengthening cross beam <422> are respectively connected to the longitudinally beam units by a cross beam connecting plate <4-4>; such a setting facilitates the connection of the front floor strengthening cross beam <422> between the two longitudinally beam units.

[0083] In the present invention, each longitudinally beam unit includes a longitudinally beam body <4-1>, and the longitudinally beam body <4-1> is the main structure of the longitudinally beam unit; in the present invention, the longitudinally beam body <4-1> includes a rear longitudinally beam <4-12> and a front longitudinally beam <4-11>; a crush groove <4-13> is provided on the front longitudinally beam <4-11>; through the setting of the crush groove <4-13> on the front longitudinally beam <4-11> in the present invention, the front longitudinally beam <4-11> acts as an energy absorption box during subsequent collisions, achieving collision energy absorption.

[0084] It should be noted here that since the present invention is applicable to a non - load - bearing body; during a normal collision, the front and rear ends of the vehicle frame <600> have their own anti - collision beams, so during normal times, the longitudinally beam units in the body floor unit are substrates that do not participate in the collision. The present invention designs a crush groove <4-13> at the front end of the longitudinally beam unit mainly to buffer and absorb energy during a major collision.

[0085] In this invention, the front longitudinal beam 4-11 and the rear longitudinal beam 4-12 are intersecting. The height of the end of the front longitudinal beam 4-11 near the rear longitudinal beam 4-12 from the horizontal plane is lower than the height of the end of the front longitudinal beam 4-11 away from the rear longitudinal beam 4-12 from the horizontal plane. Based on this design, the vehicle floor unit is higher in the front and lower in the rear. Based on the vehicle frame 600, the front longitudinal beam 4-11 is essentially in a raised state. This arrangement allows the vehicle using this vehicle floor unit to have at least two longitudinal areas capable of collapsing and absorbing energy, achieving stepped energy absorption and optimizing the overall vehicle collision effect.

[0086] Furthermore, in this invention, the longitudinal beam body 4-1 is provided with a longitudinal beam front cover plate 402 at one end and a longitudinal beam rear cover plate 408 at the other end; the seat frame side plate structure is connected to the longitudinal beam body 4-1 through the longitudinal beam rear cover plate 408; the longitudinal beam body 4-1 is connected to the seat rear crossbeam 412 through a longitudinal beam connecting plate; the longitudinal beam front cover plate 402 and the longitudinal beam rear cover plate 408, in this invention, are equivalent to locally increasing the area of ​​the longitudinal beam body 4-1, which facilitates the overlap with adjacent components. For example, in this invention, the longitudinal beam rear cover plate 408 can realize multi-area support connection of the seat frame side plate structure.

[0087] A vehicle includes a body floor unit for a non-load-bearing body; the body floor unit is connected to a frame 600; the connection is generally achieved by suspension bolts. Example

[0088] This invention discloses a floor structure for non-load-bearing micro-truck models. This invention proposes a novel floor structure that can solve the problems of insufficient space in the existing cab seating area; difficulty for the driver and passenger to move and retrieve items when the vehicle is parked, resulting in poor convenience; and insufficient legroom and poor comfort for passengers.

[0089] The floor structure disclosed in this invention involves spot welding the floor panel assembly 100 and the seat upper crossbeam 500 onto the floor frame assembly 400.

[0090] The right wheel hub and longitudinal beam connecting plate 200 and the left wheel hub and longitudinal beam connecting plate 300 are used to reinforce the connection between the floor frame assembly 400 and the floor panel assembly 100.

[0091] The left side plate 103, the front plate 104, and the right side plate 105 of the seat frame are connected by spot welding and assembled into the front plate 104 assembly.

[0092] The seat frame front panel 104 assembly is combined with the front floor 101, left front wheel cover 102, and right front wheel cover 106 to form the seat frame side panel structure.

[0093] The two longitudinal beam units of this invention are referred to as the left longitudinal beam unit and the right longitudinal beam unit, respectively, according to their distribution positions.

[0094] The left longitudinal beam unit includes a left longitudinal beam 403 and a left rear longitudinal beam connecting plate 409. The left longitudinal beam unit is also reinforced with a front suspension left mounting reinforcement plate 404 and a rear longitudinal beam connecting plate reinforcement plate 410 (the right longitudinal beam unit is symmetrical to the left longitudinal beam unit; the main difference is the name).

[0095] In this invention, the left rear longitudinal beam connecting plate 409 is a box-shaped structure, and the rear longitudinal beam connecting plate reinforcing plate 410 is equivalent to being embedded in the end of the left rear longitudinal beam connecting plate 409.

[0096] In addition, the rear longitudinal beam connecting plate reinforcing plate 410 of the present invention is arranged in the longitudinal direction and is located below the seat crossbeam structure. In subsequent use, the left rear longitudinal beam connecting plate 409 and the rear longitudinal beam connecting plate reinforcing plate 410 act as supporting reinforcements, which effectively ensures the stability of the longitudinal arrangement of the seat crossbeam structure.

[0097] Because the left and right longitudinal beams of this invention are symmetrically distributed, the rear section of the right longitudinal beam is equivalent to having a right rear longitudinal beam connecting plate and a rear longitudinal beam connecting plate reinforcing plate 410.

[0098] The floor frame assembly 400 disclosed in this invention mainly includes a left longitudinal beam unit, a right longitudinal beam unit, and a front protective crossbeam 401.

[0099] The crossbeam connecting plate 4-4 is also called the left crossbeam connecting plate 405 and the right crossbeam connecting plate 421 depending on its location.

[0100] The floor frame assembly 400 and the left front door sill sealing plate 406 are connected by the left support plate 407 of the longitudinal beam sill and the rear cover plate 408 of the left front longitudinal beam (the structure on the right side is symmetrical to that on the left side).

[0101] To enhance the safety of occupants inside the vehicle, the front section of the longitudinal beam body 4-1 is equipped with a crumple zone 4-13 to assist the frame 600 in absorbing energy during a collision.

[0102] In this invention, the upper crossbeam 500 of the seat and the rear crossbeam 412 of the seat form a large plate frame rear crossbeam cavity, and the cavity is supported and reinforced by a support plate 411 and a rear longitudinal beam connecting plate reinforcing plate 413.

[0103] Based on the above-mentioned seat beam structure, the torsional stiffness and bending stiffness of the entire vehicle are greatly improved.

[0104] Advantages of this invention:

[0105] The vehicle floor unit disclosed in this invention has no central passage structure; it increases the legroom for the driver and passengers in the cab, improving ride comfort; at the same time, it connects the driver and passenger seats without steps, facilitating movement between the driver and passenger seats and greatly increasing the convenience of vehicle use.

[0106] The present invention strengthens the entire vehicle body and floor by setting up a front reinforcing beam 422 and a rear reinforcing beam 419 on the floor; effectively improving the rigidity of the vehicle floor unit and solving the problem of the floor panel assembly 100 being recessed.

[0107] The longitudinal beam body 4-1 of the present invention has a crumple groove 4-13 added to its front part to assist in collision energy absorption and increase the safety of the driver's cab.

[0108] The rear seat crossbeam structure adopts a cavity structure, and a support plate 411 is added inside the cavity; the large cavity is used to improve the torsional stiffness and bending stiffness of the whole vehicle.

[0109] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A non-load-bearing vehicle body floor unit, characterized in that, This includes the floor frame assembly, the floor panel assembly, and the seat frame assembly; The floor panel assembly and the seat frame assembly are connected to the floor frame assembly; The end of the floor panel assembly is connected to the floor frame assembly via the seat frame assembly; The floor panel assembly includes a front floor; The seat frame assembly includes a seat frame side plate structure and a seat crossbeam structure; the seat frame side plate structure and the seat crossbeam structure form a ring structure. The seat frame side panel structure includes a seat frame front panel; both ends of the seat frame front panel are connected to the seat crossbeam structure via a seat frame left side panel and a seat frame right side panel, respectively. The front panel of the seat frame and the seat crossbeam structure are spaced apart; the horizontal projection of the side panel structure of the seat frame is C-shaped; the side of the front panel of the seat frame near the front of the vehicle is flat; the front side of the front panel of the seat frame is a flat surface. The seat crossbeam structure includes a rear seat crossbeam and an upper seat crossbeam; The rear crossbeam of the seat is connected to the floor frame assembly; The seat frame side panel structure overlaps on the rear crossbeam of the seat; The rear crossbeam of the seat includes a crossbeam base plate; a front side plate and a rear side plate are respectively provided on opposite sides of the crossbeam base plate; an overlapping connecting plate is provided at the end of the front side plate and the rear side plate away from the crossbeam base plate. The upper crossbeam of the seat overlaps the rear crossbeam of the seat; The seat crossbeam structure also includes a support unit; the support unit includes at least one support plate; the support plate is connected to both the upper crossbeam and the rear crossbeam of the seat. The upper crossbeam and the rear crossbeam of the seat form an assembly cavity; the support unit is arranged in the assembly cavity.

2. The non-load-bearing body floor unit according to claim 1, characterized in that, The floor frame assembly includes two spaced longitudinal beam units; one end of the two longitudinal beam units is connected by a front bumper crossbeam, and the other end is connected by a rear seat crossbeam; the two longitudinal beam units are also connected by a reinforcing unit, which includes a front floor reinforcing crossbeam and a rear floor reinforcing crossbeam.

3. A non-load-bearing body floor unit according to claim 2, characterized in that, The two ends of the front reinforcing beam of the floor are respectively connected to the longitudinal beam unit by a beam connecting plate.

4. A non-load-bearing body floor unit according to claim 2, characterized in that, Each of the longitudinal beam units includes a longitudinal beam body, which includes a rear longitudinal beam and a front longitudinal beam; the front longitudinal beam is provided with a collapsible groove.

5. A non-load-bearing body floor unit according to claim 4, characterized in that, The front longitudinal beam and the rear longitudinal beam are arranged to intersect; the height of the end of the front longitudinal beam closer to the rear longitudinal beam from the horizontal plane is lower than the height of the end of the front longitudinal beam farther from the rear longitudinal beam from the horizontal plane.

6. A non-load-bearing body floor unit according to claim 4, characterized in that, The longitudinal beam body has a front cover plate at one end and a rear cover plate at the other end; the seat frame side plate structure is connected to the longitudinal beam body through the rear cover plate; the longitudinal beam body is connected to the rear crossbeam of the seat through a longitudinal beam connecting plate.

7. A vehicle, characterized in that, Includes a non-load-bearing body floor unit as described in any one of claims 1-6; the body floor unit is connected to the vehicle frame.

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