Lower vehicle body structure and vehicle

Abstract

The utility model provides a lower vehicle body structure and a vehicle, and the lower vehicle body structure comprises at least two doorsill beams which are arranged in parallel; the floor assembly is mounted between the two threshold beams; the cross beam assembly comprises a plurality of cross beams installed on the floor assembly, and the ends of the cross beams are connected with the doorsill beams respectively; the reinforcing plate is installed on the face, away from the cross beam assembly, of the floor assembly, the reinforcing plate is sunken in the thickness direction to form a first groove, and a groove opening of the first groove is matched with the floor assembly to form a first cavity. According to the scheme, the side column collision resistance of the lower vehicle body structure is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the field of automobiles, and in particular relates to a lower vehicle body structure and a vehicle. Background Art

[0002] With the advancement of electric vehicle technology, the required range of electric vehicles is increasing. In addition to increasing the energy density of power batteries, sufficient space for the power batteries must be provided in the lower body. While the overall vehicle footprint remains unchanged, the space required for other parts (such as the space occupied by the lower body structure) must be reduced. At the same time, the lower body structure must also meet the requirements of lightweight and side-column impact resistance. Existing lower body structures have weak side-column impact resistance due to space reduction and structural design issues, failing to meet actual requirements. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a lower vehicle body structure and a vehicle for solving the above-mentioned problems.

[0004] To achieve the above-mentioned and other related purposes, the present invention provides a lower vehicle body structure, comprising:

[0005] There are at least two threshold beams, which are arranged in parallel;

[0006] a floor assembly installed between the two threshold beams;

[0007] a crossbeam assembly comprising a plurality of crossbeams mounted on the floor assembly, wherein ends of the crossbeams are respectively connected to the door sill beams;

[0008] A reinforcing plate is installed on a side of the floor assembly facing away from the crossbeam assembly. The reinforcing plate is recessed in the thickness direction to form a first groove. The notch of the first groove cooperates with the floor assembly to form a first cavity.

[0009] Optionally, a second groove is formed on the crossbeam in the thickness direction, the notch of the second groove faces the floor assembly and cooperates with the floor assembly to form a second cavity.

[0010] Optionally, a plurality of reinforcement cavities are formed in the sill beam along the length direction of the sill beam.

[0011] Optionally, the rocker beam includes a first reinforcement area, a second reinforcement area, and a third reinforcement area in which reinforcement cavities are distributed. The second reinforcement area and the third reinforcement area are arranged on the side of the first reinforcement area, the second reinforcement area is arranged corresponding to the side outside the vehicle, and the third reinforcement area is arranged corresponding to the installation position of the floor assembly. The distribution density of the reinforcement cavities in the second reinforcement area and the third reinforcement area is greater than the distribution density of the reinforcement cavities in the first reinforcement area.

[0012] Optionally, the third reinforcement area and the crossbeam assembly are distributed at the same height position.

[0013] Optionally, a first cavity wall is formed in the door sill beam and is arranged along the axis direction of the crossbeam. The first cavity wall extends from the first reinforcement area to the second reinforcement area and separates the reinforcement cavity.

[0014] Optionally, a second cavity wall is formed in the door sill beam, and the second cavity wall is arranged in a vertical direction of the first cavity wall and separates the reinforcement cavity.

[0015] Optionally, a supporting protrusion for supporting the reinforcing plate is provided on the floor assembly, and the supporting protrusion is provided to protrude toward the first cavity.

[0016] Optionally, a connecting member is provided between the cross beam and the threshold beam, and the connecting member connects the cross beam and the threshold beam respectively.

[0017] To achieve the above-mentioned purpose and other related purposes, the present invention provides a vehicle including the above-mentioned lower vehicle body structure.

[0018] As described above, the lower vehicle body structure and the vehicle of the present invention have the following beneficial effects:

[0019] In this solution, the door sill beam and floor assembly serve as supports, etc. The crossbeam assembly is provided for mounting seats, supporting the seats and transmitting lateral force, thereby increasing the lower body structure's ability to resist side-pillar collisions. The reinforcement plate is provided to increase the strength of the lower body structure and improve its ability to resist side-pillar collisions. The provision of the first cavity, while meeting the requirements of lightweighting, further improves the lower body structure's ability to resist side-pillar collisions and reduces the possibility of crossbeam deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is an axonometric view of the lower vehicle body structure in an embodiment of the present invention.

[0021] Figure 2 This is another axonometric view of the lower vehicle body structure in an embodiment of the present invention.

[0022] Figure 3 It is a top view of the lower vehicle body structure in an embodiment of the present utility model.

[0023] Figure 4 for Figure 3 Cross-section at AA in the middle.

[0024] Figure 5 This is a schematic diagram of the interior of the door sill beam in an embodiment of the present invention.

[0025] Figure 6 This is an exploded view of the lower vehicle body structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The figure marks in the drawings of the specification include: door sill beam 1, first reinforcement area 101, second reinforcement area 102, third reinforcement area 103, installation avoidance position 104, second cavity wall 105, inclined cavity wall 106, reinforcement cavity 107, first cavity wall 108, floor assembly 2, front floor front section 201, support protrusion 2011, front floor middle section 202, reinforcement beam 203, front floor rear section 204, cross beam 3, connecting part 4, mounting part 5, reinforcement plate 6, fixing part 7, first cavity 8, second cavity 9, and third cavity 10.

[0027] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0028] Reference Attachment Figure 1 To the attached Figure 6 , the present application provides a lower vehicle body structure, comprising:

[0029] There are at least two threshold beams 1, which are arranged in parallel.

[0030] A floor assembly 2 is installed between the two threshold beams 1;

[0031] A crossbeam assembly includes a plurality of crossbeams 3 mounted on the floor assembly 2, with ends of the crossbeams 3 respectively connected to the door sill beams 1;

[0032] The reinforcing plate 6 is installed on the side of the floor assembly 2 facing away from the beam assembly. The reinforcing plate 6 is recessed in the thickness direction to form a first groove. The notch of the first groove cooperates with the floor assembly 2 to form a first cavity 8.

[0033] In this embodiment, the sill beam 1 and floor assembly 2 serve as supports. The crossbeam assembly is used to mount the seats, providing support and lateral force transmission, enhancing the lower body structure's resistance to side-pillar impacts. The reinforcement plate 6 is provided to increase the strength of the lower body structure and improve its resistance to side-pillar impacts. The first cavity 8, while meeting lightweight requirements, further enhances the lower body structure's resistance to side-pillar impacts and reduces the possibility of deformation of the crossbeam 3.

[0034] For example, a plurality of ribs may be provided in the first groove to increase the overall strength of the reinforcing plate 6 .

[0035] Illustratively, a battery pack assembly installation avoidance position 104 is provided on one side of the door sill beams 1 close to each other, so as to increase the installation space of the battery pack assembly between the door sill beams 1 and meet the installation requirements of the battery pack assembly.

[0036] In an exemplary embodiment, a second groove is formed in the thickness direction of the crossbeam 3 . The notch of the second groove faces the floor assembly 2 and cooperates with the floor assembly 2 to form a second cavity 9 .

[0037] It should be noted that the second groove provided on crossbeam 3 creates a hollow interior, meeting lightweight requirements while also reducing material consumption. Furthermore, compared to a flat plate structure, crossbeam 3 with the second groove increases its rigidity and effectively reduces the possibility of deformation.

[0038] For example, see the attached Figure 4 As shown, in order to further increase the ability to resist side pillar collision, the first groove on the reinforcing plate 6 is provided along the axial direction of the crossbeam 3 and corresponds to the position of the crossbeam 3 .

[0039] In an exemplary embodiment, a plurality of reinforcement cavities 107 are formed in the sill beam 1 along the length direction of the sill beam 1 .

[0040] It should be noted that to meet lightweight requirements, the sill beam 1 can be hollow. However, a hollow design would result in the sill beam 1 failing to meet stiffness requirements. Therefore, multiple reinforcement cavities 107 are provided within the sill beam 1 to increase its ability to withstand side-pillar collisions.

[0041] For example, the sill beam 1 is integrally formed, which can reduce assembly steps and effectively reduce the assembly time of the lower vehicle body structure compared to assembling multiple parts to form the sill beam 1 and the reinforcement cavity 107 therein.

[0042] Reference Attachment Figure 5As shown, in an exemplary embodiment, the rocker beam 1 includes a first reinforcement area 101, a second reinforcement area 102, and a third reinforcement area 103, each of which has reinforcement cavities 107 distributed therein. The second reinforcement area 102 and the third reinforcement area 103 are arranged on the sides of the first reinforcement area 101, with the second reinforcement area 102 being arranged corresponding to the vehicle exterior, and the third reinforcement area 103 being arranged corresponding to the installation position of the floor assembly 2. The distribution density of the reinforcement cavities 107 in the second reinforcement area 102 and the third reinforcement area 103 is greater than the distribution density of the reinforcement cavities 107 in the first reinforcement area 101.

[0043] It's worth noting that when a vehicle is hit from the side, the second reinforced area 102 is subject to greater force. Therefore, the density of the reinforcement cavities 107 within the second reinforced area 102 is greater than that within the first reinforced area 101 to enhance side-pillar impact resistance. The third reinforced area 103, on the other hand, connects to the crossbeam 3, where seats and other components are mounted. Therefore, the strength of the third reinforced area 103 needs to be increased, and the density of the reinforcement cavities 107 therein is greater than that of the first reinforced area 101.

[0044] In an exemplary embodiment, the third reinforcement area 103 and the crossbeam assembly are located at the same height.

[0045] In this embodiment, in order to provide reinforcement in the force transmission direction when the vehicle is subjected to a side impact, the third reinforcement area 103 and the crossbeam assembly are arranged at the same height.

[0046] In an exemplary embodiment, a first cavity wall 108 is formed in the sill beam 1 and is arranged along the axis direction of the cross beam 3 . The first cavity wall 108 extends from the first reinforcement area 101 to the second reinforcement area 102 and separates the reinforcement cavity 107 .

[0047] In this embodiment, in order to provide reinforcement in the force transmission direction when the vehicle is subjected to a lateral impact, a first cavity wall 108 is provided, and the first cavity wall 108 extends from the first reinforcement area 101 to the second reinforcement area 102, providing a transmission path for the transmission of the lateral impact force.

[0048] In an exemplary embodiment, a second cavity wall 105 is further formed in the door sill beam 1 . The second cavity wall 105 is disposed in a vertical direction of the first cavity wall 108 and separates the reinforcement cavity 107 .

[0049] In this embodiment, the second cavity wall 105 is provided to increase the load-bearing capacity and to separate and reinforce the cavity 107 .

[0050] Exemplarily, an inclined cavity wall 106 is further provided in the second reinforcement region 102. The inclined cavity wall 106 is provided on the reinforcement cavity 107 on the side of the second reinforcement region 102 away from the third reinforcement region 103 and separates the reinforcement cavity 107 in the second reinforcement region 102. The provision of the inclined cavity wall 106 facilitates the connection of vehicle interior parts.

[0051] Exemplarily, the installation avoidance position 104 of the battery pack assembly is arranged on a side of the first reinforcement area 101 away from the second reinforcement area 102 and a side away from the third reinforcement area 103 .

[0052] For example, the threshold beam 1 is made of aluminum profile, which improves the overall rigidity of the threshold beam 1 while meeting the lightweight requirement.

[0053] Exemplarily, the number of beams 3 provided in the beam assembly can be two, three, four or more to meet different needs.

[0054] In an exemplary embodiment, a supporting protrusion 2011 for supporting the reinforcing plate 6 is provided on the floor assembly 2 , and the supporting protrusion 2011 is provided to protrude toward the first cavity 8 .

[0055] In this embodiment, the supporting protrusion 2011 is provided to increase the impact resistance of the reinforcing plate 6 and improve the overall strength of the lower vehicle body structure.

[0056] In an exemplary embodiment, a connecting member 4 is provided between the cross beam 3 and the sill beam 1 , and the connecting member 4 connects the cross beam 3 and the sill beam 1 respectively.

[0057] In this embodiment, the door sill beam 1 and the cross beam 3 are connected and fixed via a connecting member 4 .

[0058] Illustratively, the floor assembly 2 includes a front floor front section 201, a front floor middle section 202, and a front floor rear section 204, which are arranged in sequence from the front of the vehicle to the rear of the vehicle. The front floor front section 201, the front floor middle section 202, and the front floor rear section 204 are fixedly connected in sequence, and the crossbeam assembly is fixedly connected to the floor assembly 2.

[0059] For example, a reinforcing beam 203 is provided on the rear section 204 of the front floor. The reinforcing beam 203 is connected to the door sill beam 1 through a fixing member 7. The reinforcing beam 203 is provided with a third groove in the thickness direction so that the reinforcing beam 203 is installed on the rear section 204 of the front floor to form a third cavity 10 (see attached Figure 2 shown).

[0060] It should also be noted that the structures of the front floor rear section 204 and the reinforcement beam 203 in the drawings of this application are only partially drawn, and the overall structure of the front floor rear section 204 and the reinforcement beam 203 is not shown.

[0061] Exemplarily, the front floor front section 201 , the front floor middle section 202 , the front floor rear section 204 , the reinforcement beam 203 , and the cross beam assembly are connected and fixed to each other by welding.

[0062] For example, when assembling the lower body structure, the floor assembly 2 is assembled first, and then the crossbeam assembly is assembled on the floor assembly 2. Finally, the combination of the floor assembly 2 and the crossbeam assembly is connected to the door sill beam 1. The crossbeam assembly and the door sill beam 1 are connected by a connecting member 4, and the floor assembly 2 and the door sill beam 1 are connected by a mounting member 5.

[0063] For example, the connecting member 4 , the mounting member 5 and the threshold beam 1 are overlapped and then connected by bolts or the like to increase the strength of the connection portion between the crossbeam assembly, the floor assembly 2 and the threshold beam 1 .

[0064] With respect to the above-mentioned lower vehicle body structure, the present application also provides a vehicle comprising the above-mentioned lower vehicle body structure.

[0065] In an embodiment, the above-mentioned lower vehicle body structure is applied to a vehicle, which effectively improves the vehicle's ability to resist side impacts while meeting the demand for lightweighting of the vehicle.

[0066] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A lower vehicle body structure, characterized in that: include: There are at least two threshold beams, which are arranged in parallel; a floor assembly installed between the two threshold beams; a crossbeam assembly comprising a plurality of crossbeams mounted on the floor assembly, wherein ends of the crossbeams are respectively connected to the door sill beams; a reinforcing plate, the reinforcing plate being mounted on a side of the floor assembly facing away from the crossbeam assembly, the reinforcing plate being recessed in a thickness direction to form a first groove, a notch of the first groove cooperating with the floor assembly to form a first cavity; Among them, along the length direction of the sill beam, a plurality of reinforcement cavities are formed in the sill beam, and the sill beam includes a first reinforcement area, a second reinforcement area and a third reinforcement area in which reinforcement cavities are distributed. The second reinforcement area and the third reinforcement area are arranged on the side of the first reinforcement area, the second reinforcement area is arranged corresponding to the side outside the vehicle, and the third reinforcement area is arranged corresponding to the installation position of the floor assembly.

2. The lower vehicle body structure according to claim 1, wherein: A second groove is formed on the crossbeam in the thickness direction. The notch of the second groove faces the floor assembly and cooperates with the floor assembly to form a second cavity.

3. The lower vehicle body structure according to claim 1, wherein: The distribution density of the reinforcement cavities in the second reinforcement area and the third reinforcement area is greater than the distribution density of the reinforcement cavities in the first reinforcement area.

4. The lower vehicle body structure according to claim 1, wherein: The third reinforcement area and the crossbeam assembly are distributed at the same height position.

5. The lower vehicle body structure according to claim 1, wherein: A first cavity wall is formed in the door sill beam and is arranged along the axis direction of the cross beam. The first cavity wall extends from the first reinforcement area to the second reinforcement area and separates the reinforcement cavity.

6. The lower vehicle body structure according to claim 5, characterized in that: A second cavity wall is also formed in the door sill beam. The second cavity wall is arranged in a vertical direction of the first cavity wall and separates the reinforcement cavity.

7. The lower vehicle body structure according to claim 1, wherein: The floor assembly is provided with a supporting protrusion for supporting the reinforcing plate, and the supporting protrusion is provided to protrude toward the first cavity.

8. The lower vehicle body structure according to claim 1, wherein: A connecting piece is provided between the cross beam and the threshold beam, and the connecting piece connects the cross beam and the threshold beam respectively.

9. A vehicle, characterized in that: The vehicle comprises the lower vehicle body structure according to any one of claims 1 to 8.

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