Automobile rear floor

Abstract

The utility model discloses an automobile rear floor which comprises a rear floor body and a seat installation frame arranged on the rear floor body, the seat installation frame comprises a front installation cross beam and a rear installation cross beam which are sequentially arranged in the length direction of an automobile body, and a connecting longitudinal beam is arranged between the front installation cross beam and the rear installation cross beam. Closed cavity structures are formed among the front mounting cross beam, the rear mounting cross beam, the connecting longitudinal beam and the rear floor body; according to the utility model, the seat mounting frame which is designed to be similar to the H shape on the whole is arranged on the rear floor, and each beam in the seat mounting frame and the rear floor form a larger cavity structure, so that the bending resistance and torsion resistance of the seat mounting frame are improved, and the risk that the seat mounting frame is extruded to deform is avoided; and meanwhile, the seat mounting frame can also play a role in improving the rigidity and strength of the whole vehicle floor in the lateral direction and the forward direction, and the situation that the side collision intrusion amount or the rear collision intrusion amount of a vehicle body is too large when collision occurs is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body structure technology, specifically to a rear floor of an automobile. Background Technology

[0002] In the vehicle body structure, the floor bears the weight of vehicle accessories, passengers, and cargo. It also withstands the loads, vibrations, impacts, and torques generated during vehicle movement, and strives to ensure that the passenger space does not deform excessively in the event of a collision, thus preventing injury to occupants. The vehicle floor includes the front floor and the rear floor, with the rear floor primarily serving as the main area for rear passengers.

[0003] In existing technology, car seats are mainly composed of headrests, backrests, seat cushions, armrests, etc. Rear seats are usually installed directly on the rear floor of the vehicle through mounting brackets at the bottom of the seat cushions. When using the above installation method, although the mounting brackets themselves have a certain rigidity to ensure the normal installation and support of the seat, the direct connection between the mounting brackets and the rear floor can easily lead to a decrease in the structural strength and torsional stiffness at the connection point. As a result, in the event of a car collision, the overall rigidity of the rear floor is not high, the side impact intrusion is large, or the rear impact intrusion is large, and ultimately endangers the life safety of passengers.

[0004] Therefore, it is necessary to improve the existing rear floor and seat installation structure to avoid damaging the rigidity of the rear floor itself, while also effectively preventing excessive side or rear collision intrusion into the vehicle body during a collision. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a rear floor for automobiles, which realizes seat installation by setting a seat mounting frame on the rear floor to replace the seat mounting bracket in the prior art, thereby avoiding the damage to the overall rigidity of the rear floor caused by direct installation of the mounting bracket to the rear floor; and the seat mounting frame and the rear floor form a cavity structure after being connected, which can also improve the lateral rigidity and positive rigidity of the entire vehicle floor and prevent excessive collision intrusion.

[0006] The present invention provides a rear floor for automobiles, including a rear floor body and a seat mounting frame disposed on the rear floor body. The seat mounting frame includes a front mounting crossbeam and a rear mounting crossbeam arranged sequentially along the length of the vehicle body. A connecting longitudinal beam is provided between the front mounting crossbeam and the rear mounting crossbeam. A closed cavity structure is formed between the front mounting crossbeam, the rear mounting crossbeam and the connecting longitudinal beam and the rear floor body.

[0007] Furthermore, the rear floor body includes a first floor and a second floor. The second floor has an clearance notch at the installation position of the vehicle fuel tank. The first floor is disposed at the clearance notch and has a fuel tank receiving cavity. The vehicle fuel tank receiving cavity is formed by the bottom surface of the first floor protruding upward.

[0008] Furthermore, the periphery of the first floor is fixedly connected to the periphery of the clearance notch of the second floor, and the two sides of the front mounting beam in the length direction of the vehicle body overlap with the bottom surface of the first floor and the upper surface of the fuel tank cavity, respectively.

[0009] Furthermore, the connecting longitudinal beam is disposed on the upper surface of the fuel tank cavity and the front end of the connecting longitudinal beam extends forward along the length of the vehicle body to the bottom surface of the first floor. The cross-section of the overlapping area of ​​the connecting longitudinal beam and the front mounting crossbeam in the width direction of the vehicle body is triangular.

[0010] Furthermore, the front mounting crossbeam includes a left front crossbeam disposed on the left side of the connecting longitudinal beam along the vehicle width direction and a right front crossbeam disposed on the right side of the connecting longitudinal beam. The ends of the left front crossbeam and the right front crossbeam near the connecting longitudinal beam respectively overlap with the connecting longitudinal beam, and the ends of the left front crossbeam and the right front crossbeam away from the connecting longitudinal beam are provided with sealing plates.

[0011] Furthermore, the second floor has a groove at the rear end where it connects with the first floor, and the rear mounting beam is positioned above the groove and overlaps with both the first floor and the second floor.

[0012] Furthermore, the right front crossbeam and the left front crossbeam are offset from each other on the connecting longitudinal beam along the width direction of the vehicle body.

[0013] Furthermore, the right front crossbeam and the left front crossbeam are provided with weight reduction holes, and the right front crossbeam and the left front crossbeam are also provided with reinforcing ribs on their vertical surfaces in the length direction of the vehicle body.

[0014] Furthermore, the rear-mounted crossbeam is integrally stamped, and the ends of the rear-mounted crossbeam along its length are sealed.

[0015] Furthermore, the connecting longitudinal beam is connected to the middle section of the front mounting crossbeam and the middle section of the rear mounting crossbeam respectively, and together with the front mounting crossbeam and the rear mounting crossbeam, forms an overall structure similar to an "H".

[0016] The beneficial effects of this utility model are as follows: This utility model replaces the existing mounting bracket structure with a beam-type mounting frame, thereby avoiding the damage to the rigidity of the rear floor caused by direct installation of the mounting bracket and the rear floor; the overall seat mounting frame has an "H"-shaped design, and each beam forms a large cavity structure with the rear floor, which improves the bending and torsional resistance of the seat mounting frame and avoids the risk of the seat mounting frame being squeezed and deformed; at the same time, the seat mounting frame can also improve the lateral and frontal rigidity of the entire vehicle floor, effectively preventing excessive side or rear collision intrusion into the vehicle body during a collision. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the structure of the rear floor of a car in this utility model;

[0019] Figure 2 This is a schematic diagram showing the connection between the first floor and the connecting longitudinal beam in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the second floor in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the left front crossbeam and the left sealing plate in this utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the right front crossbeam and the right sealing plate in this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the rear-mounted crossbeam in this utility model;

[0024] Figure 7 This is a schematic diagram of the seat mounting frame in this utility model;

[0025] The attached diagram is labeled as follows: 1-First floor; 2-Second floor; 3-Left front crossbeam; 4-Right front crossbeam; 5-Rear mounting crossbeam; 6-Connecting longitudinal beam; 7-Left sealing plate; 8-Right sealing plate; 9-Reinforcing rib; 10-Weight reduction hole; 11-Fuel tank cavity; 12-Bottom surface of the first floor; 13-Triangular structure area; 14-Avoidance notch; 15-Groove section; 16-Seat mounting hole. Detailed Implementation

[0026] As shown in the figure, the automotive rear floor provided by this utility model includes a rear floor body and a seat mounting frame disposed on the rear floor body. The seat mounting frame includes a front mounting crossbeam and a rear mounting crossbeam 5 arranged sequentially along the length of the vehicle body. A connecting longitudinal beam 6 is provided between the front mounting crossbeam and the rear mounting crossbeam 5. A closed cavity structure is formed between the front mounting crossbeam, the rear mounting crossbeam 5, and the connecting longitudinal beam 6 and the rear floor body. In existing rear floor installations, the rear seats are usually directly bolted to the rear floor using a connecting mounting frame or mounting bracket, and then seat components such as seat cushions are placed on the mounting frame or mounting bracket to complete the installation. However, this connection method compromises the overall rigidity of the rear floor. While existing technologies may not be able to reduce collision intrusion and prevent injury to passengers during a collision, this solution replaces the existing mounting bracket structure with a beam-type seat mounting frame formed by multiple overlapping beams. This avoids the direct connection between the mounting bracket and the rear floor, which could compromise the rigidity of the rear floor. The seat mounting frame includes a front mounting crossbeam, a rear mounting crossbeam 5, and a connecting longitudinal beam 6. All three beams are welded to the rear floor, and each beam forms a large closed cavity structure after connecting to the rear floor. This not only improves the overall rigidity of the rear floor but also enhances the bending and torsional resistance of the seat mounting frame, preventing the risk of the seat mounting frame being deformed by compression.

[0027] In this embodiment, the rear floor body includes a first floor 1 and a second floor 2. The second floor 2 has a clearance notch 14 at the installation position of the vehicle fuel tank. The first floor 1 is disposed at the clearance notch 14 and has a fuel tank receiving cavity 11. The vehicle fuel tank receiving cavity 11 is formed by the bottom surface of the first floor 1 protruding upwards. Figures 1 to 3 As shown, the rear floor usually has reserved space for the installation of the vehicle's fuel tank. However, due to the large overall shape and size of the rear, it is difficult to form a single piece. Therefore, the rear floor body is designed as a split structure consisting of a first floor 1 and a second floor 2 to reduce manufacturing difficulty. The fuel tank receiving cavity 11, which requires reserved space for the installation of the vehicle's fuel tank, is set on the first floor 1, and a corresponding clearance notch 14 is provided on the second floor 2. Since the overall size of the first floor 1 is small, the fuel tank receiving cavity 11 and the body of the first floor 1 can be formed by integral stamping. The fuel tank receiving cavity 11 is formed by the bottom surface of the first floor 1 protruding upwards.

[0028] In this embodiment, the periphery of the first floor 1 is fixedly connected to the periphery of the clearance notch 14 of the second floor 2. The two side facades of the front mounting beam in the vehicle length direction overlap with the bottom surface of the first floor 1 and the upper surface of the fuel tank cavity 11, respectively. The first floor 1 and the second floor 2 need to be connected to form the rear floor body structure. To ensure that the connection strength between the first floor 1 and the second floor 2 does not affect the overall rigidity of the rear floor, a method of edge overlap followed by welding is used for fixed connection; that is, the periphery of the first floor 1 is fixedly connected to the periphery of the clearance notch 14 of the second floor 2. The installation position of the rear seats... The seat is typically located directly above the fuel tank. Therefore, to ensure the connection strength between the seat mounting frame and the rear floor body, and considering the structural shape of the first floor 1, the front mounting beam in the seat mounting frame is positioned between the bottom surface of the first floor 1 and the upper surface of the fuel tank cavity 11. Furthermore, the two vertical surfaces of the front mounting beam in the vehicle's length direction overlap and are welded to the bottom surface of the first floor 1 and the upper surface of the fuel tank cavity 11, respectively. The specific shape, structure, and overlap relationship of the first floor 1 and the second floor 2 can be adapted to different vehicle models. In this solution, the specific shape, structure, and overlap relationship of the first floor 1 and the second floor 2 are as follows: Figures 1 to 3 As shown.

[0029] In this embodiment, the connecting longitudinal beam 6 is disposed on the upper surface of the fuel tank receiving cavity 11, and the front end of the connecting longitudinal beam 6 extends forward along the length of the vehicle body to the bottom surface of the first floor 1. The overlapping area of ​​the connecting longitudinal beam 6 and the front mounting crossbeam has a triangular cross-section in the width direction of the vehicle body; combined with Figure 2 As shown, since the front mounting crossbeam needs to overlap with the bottom surface of the first floor 1 and the upper surface of the fuel tank cavity 11 respectively, the front end of the connecting longitudinal beam 6 also needs to extend to the bottom surface of the first floor 1 to ensure the connection with the front mounting crossbeam. At this time, the cavity cross-section of the overlap area between the connecting longitudinal beam 6 and the front mounting crossbeam in the vehicle width direction is a triangular structure. The triangular cavity form with good structural stability ensures the strength and rigidity of the overlap area, and also enables the overall rigidity of the front mounting crossbeam to meet the requirements.

[0030] In this embodiment, the front mounting crossbeam includes a left front crossbeam 3 disposed on the left side of the connecting longitudinal beam 6 along the vehicle width direction and a right front crossbeam 4 disposed on the right side of the connecting longitudinal beam 6. The ends of the left front crossbeam 3 and the right front crossbeam 4 near the connecting longitudinal beam 6 overlap with the connecting longitudinal beam 6, and the ends of the left front crossbeam 3 and the right front crossbeam 4 away from the connecting longitudinal beam 6 are each provided with a sealing plate; combined with Figure 1 , Figure 4 and Figure 5As shown, the front mounting beam includes a left front crossbeam 3 located on the left side of the connecting longitudinal beam 6 and a right front crossbeam 4 located on the right side of the connecting longitudinal beam 6. The left front crossbeam 3 and the right front crossbeam 4 are welded and fixed to the connecting longitudinal beam 6 at their ends near the connecting longitudinal beam 6, while the ends away from the connecting longitudinal beam 6 are provided with sealing plates. The sealing plates enable the left front crossbeam 3 and the right front crossbeam 4 to form a closed cavity structure after connecting with the rear floor, which is superior to the existing open cavity structure. Here, the left and right directions refer to the directions near the left or right door in the vehicle width direction.

[0031] In this embodiment, the second floor 2 has a groove 15 at its rear connection end with the first floor 1, and the rear mounting beam 5 is disposed above the groove 15 and overlaps with both the first floor 1 and the second floor 2; combined with Figure 1 and Figure 3 As shown, the rear mounting beam 5 is mainly set on the second floor 2, and the front end of the rear mounting beam 5 in the length direction of the vehicle body is also overlapped and fixed with the rear section of the first floor 1 and the connecting longitudinal beam 6 respectively. Due to the influence of the height of the second floor 2 on the installation position of the rear mounting beam 5, the height dimension of the mounting beam in the height direction of the vehicle body is relatively small. In order to form a closed cavity structure between the rear mounting beam 5 and the second floor 2, a groove 15 is provided at the rear connection end of the second floor 2 and the first floor 1. The rear mounting beam 5 is set above the groove 15 and covers it. At the same time, the front end of the groove 15 in the length direction of the vehicle body can also be used for the overlap with the first floor 1.

[0032] In this embodiment, the right front crossbeam 4 and the left front crossbeam 3 are offset from each other on the connecting longitudinal beam 6 along the width direction of the vehicle body; combined with Figure 1 As shown, in existing mid-to-large SUV models, the rear seats located behind the passenger seat are generally referred to as the "boss seats," and a leg rest or similar structure is usually installed there. Therefore, in order to fold and store the leg rest, the right front crossbeam 4 and the left front crossbeam 3 need to be staggered along the width of the vehicle body on the connecting longitudinal beam 6 to reserve space for storing the leg rest.

[0033] In this embodiment, the right front crossbeam 4 and the left front crossbeam 3 are provided with weight-reducing holes 10, and the right front crossbeam 4 and the left front crossbeam 3 are also provided with reinforcing ribs 9 on their vertical surfaces along the length of the vehicle body; combined with Figure 4 and Figure 5 As shown, due to the large shape and size of the front mounting beam, in order to meet the requirements of vehicle body weight reduction, it is necessary to adjust the structure of the right front beam 4 and the left front beam 3 while meeting the performance requirements. Therefore, weight reduction holes 10 are provided on the right front beam 4 and the left front beam 3 respectively, and reinforcing ribs 9 are provided on the vertical surfaces of the right front beam 4 and the left front beam 3 in the length direction of the vehicle body.

[0034] In this embodiment, the rear-mounted crossbeam 5 is integrally stamped, and the ends of the rear-mounted crossbeam 5 along its length are sealed; combined with Figure 5 As shown, by using a one-piece stamping process to form the rear mounting beam 5, the assembly cost is reduced. At the same time, the end of the beam along its length forms a sealing structure, which can effectively improve rigidity and connection stability.

[0035] In this embodiment, the connecting longitudinal beam 6 is connected to the middle section of the front mounting crossbeam and the middle section of the rear mounting crossbeam 5, and together with the front mounting crossbeam and the rear mounting crossbeam 5, forms an H-shaped overall structure; combined with Figure 1 and Figure 7 As shown, by designing the front mounting crossbeam, the rear mounting crossbeam 5, and the connecting longitudinal beam 6 into an "H"-shaped integral structure, the lateral and forward stiffness of the vehicle floor can be improved. The top of the front mounting crossbeam and the rear mounting crossbeam 5 are provided with corresponding seat mounting holes 16 for subsequent seat installation. In addition, the connecting longitudinal beam 6 not only improves the longitudinal stiffness of the front mounting crossbeam and the rear mounting crossbeam 5, but also welds to the rear floor, improving the stiffness and modal characteristics of the rear floor and reducing floor vibration and radiated noise.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An automotive rear floor panel, characterized by: The rear floor body comprises a first floor and a second floor, the second floor is provided with a avoiding gap at the installation position of the vehicle body fuel tank, the first floor is arranged at the avoiding gap and has a fuel tank accommodating cavity, and the vehicle body fuel tank accommodating cavity is formed by upward protrusion of the bottom surface of the first floor.

2. The automotive rear floor panel according to claim 1, characterized by: The first floor is fixedly connected with the avoiding gap circumferential edge of the second floor, and the two side vertical surfaces of the front mounting cross beam in the vehicle length direction are respectively overlapped with the bottom surface of the first floor and the upper surface of the fuel tank accommodating cavity.

3. The automotive rear floor panel according to claim 2, characterized by: The connecting longitudinal beam is arranged on the upper surface of the fuel tank accommodating cavity, and the front end of the connecting longitudinal beam extends forward to the bottom surface of the first floor in the vehicle length direction, and the overlapping area of the connecting longitudinal beam and the front mounting cross beam is in a triangular structure in the vehicle width direction.

4. The automotive rear floor panel according to claim 3, characterized by: The front mounting cross beam comprises a left front cross beam arranged on the left side of the connecting longitudinal beam in the vehicle width direction and a right front cross beam arranged on the right side of the connecting longitudinal beam, the end parts of the left front cross beam and the right front cross beam close to the connecting longitudinal beam are respectively overlapped with the connecting longitudinal beam, and the end parts of the left front cross beam and the right front cross beam away from the connecting longitudinal beam are respectively provided with a sealing plate.

5. The automotive rear floor panel according to claim 4, characterized by: The second floor is provided with a groove part at the rear side connecting end of the first floor, and the rear mounting cross beam is arranged above the groove part and is respectively overlapped with the first floor and the second floor.

6. The automotive rear floor panel according to claim 2, characterized by: The right front cross beam and the left front cross beam are arranged on the connecting longitudinal beam in a staggered manner in the vehicle width direction.

7. The automotive rear floor panel according to claim 5, characterized by: The right front cross beam and the left front cross beam are provided with a weight reduction hole, and the vertical surfaces of the right front cross beam and the left front cross beam in the vehicle length direction are further provided with a reinforcing rib.

8. The automotive rear floor panel according to claim 5, characterized by: The rear mounting cross beam is integrally formed by stamping, and the end part of the rear mounting cross beam in the length direction is a sealing structure.

9. The automotive rear floor panel according to claim 1, characterized by: The connecting longitudinal beam is respectively connected with the middle part of the front mounting cross beam and the middle part of the rear mounting cross beam, and forms a whole "H" type structure together with the front mounting cross beam and the rear mounting cross beam.

10. The automotive rear floor panel according to claim 1, characterized by: ​

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