Rear floor front cross beam

Abstract

The rear floor front beam comprises a front plate part, a rear plate part, a top plate part and a bottom plate part which are connected with one another to form an inner cavity, the top plate part is fixedly connected with a first support, the bottom plate part is fixedly connected with a second support, and the top end of the front plate part deviates backwards relative to the bottom end of the front plate part. The top end of the rear plate portion is offset rearward with respect to the bottom end of the rear plate portion. The rear floor front cross beam can be manufactured through the aluminum alloy extrusion technology, the whole rear floor front cross beam is a part, the number of parts is reduced, compared with a stamping part scheme, the production cost is reduced, the overall structural strength is improved through the inner cavity structure of the rear floor front cross beam, the top end of the front plate part deviates backwards relative to the bottom end, and the service life of the rear floor front cross beam is prolonged. And the top end of the rear plate part deviates backwards relative to the bottom end, so that space requirements of functions such as a leg support structure of a seat are met, realization of related functions of a vehicle cabin is facilitated, a larger space is provided for energy storage parts such as a hydrogen tank, and the cruising ability of the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a front cross beam of a rear floor. Background Art

[0002] Taking hydrogen-powered cars as an example, the top end of the front crossbeam of the rear floor is connected to the bracket at the bottom of the seat, and the bottom end of the front crossbeam of the rear floor is connected to the bracket of the hydrogen tank. As people's requirements for comfort and car endurance become higher and higher, car seats integrate more and more functions, and the energy storage part of the car (hydrogen tank, battery, fuel tank, etc.) is gradually getting larger. The existing front crossbeam of the rear floor is usually a box-shaped cavity welded by multiple stamped sheet metal parts. Its structure will interfere with the car seat (for example, the movement range of the leg support of the seat interferes with the front crossbeam of the rear floor) and the energy storage part (for example, the larger hydrogen tank interferes with the front crossbeam of the rear floor); and it has a large number of parts and the stamping mold opening cost is high, resulting in increased production costs; in addition, under the existing technology, the direct use of aluminum material to manufacture the front crossbeam of the rear floor will make it difficult for the strength of the structure to meet the strength requirements. Utility Model Content

[0003] In view of this, the utility model aims to provide a front cross beam of a rear floor to solve at least one of the technical problems in the prior art, such as interference between the front cross beam of the rear floor and the seat and energy storage part of the car, a large number of parts, high production costs, and low strength.

[0004] The utility model provides a front cross beam of a rear floor, comprising a front plate portion, a rear plate portion, a top plate portion and a bottom plate portion which are mutually connected to form an inner cavity, the top plate portion is fixedly connected to a first bracket, the bottom plate portion is fixedly connected to a second bracket, the top end of the front plate portion is offset rearward relative to the bottom end of the front plate portion, and the top end of the rear plate portion is offset rearward relative to the bottom end of the rear plate portion.

[0005] Furthermore, the front plate portion includes a plurality of front plate segments connected in sequence, and the rear plate portion includes a plurality of rear plate segments connected in sequence, and in order from top to bottom, the angles between adjacent front plate segments and the horizontal plane gradually decrease, and the angles between adjacent rear plate segments and the horizontal plane gradually increase.

[0006] Furthermore, the front panel portion also includes a first extension section, the first extension section is connected to the bottom end of the lowest front panel section, the angle between the first extension section and the horizontal plane is greater than the angle between the lowest front panel section and the horizontal plane, and the bottom panel portion is respectively connected to the bottom end of the first extension section and the bottom end of the lowest rear panel section.

[0007] Furthermore, the top plate portion is respectively connected to the top end of the uppermost front plate segment and the top end of the uppermost rear plate segment.

[0008] Furthermore, it also includes reinforcing ribs, which are connected between the front plate portion and the rear plate portion.

[0009] Furthermore, the reinforcing rib includes a first reinforcing rib and a second reinforcing rib, the front end of the first reinforcing rib is connected to the connection between the front plate portion and the top plate portion, the front end of the second reinforcing rib is connected to the front plate portion, and the rear end of the first reinforcing rib and the rear end of the second reinforcing rib are connected to the same position of the rear plate portion; the first reinforcing rib, the second reinforcing rib and the front plate portion form a triangular cross-sectional shape.

[0010] Furthermore, the reinforcing rib includes a third reinforcing rib, a front end of the third reinforcing rib is connected to the front plate portion, and a rear end of the third reinforcing rib is connected to the rear plate portion; the third reinforcing rib, the front plate portion, the second reinforcing rib and the rear plate portion form a quadrilateral cross-sectional shape.

[0011] Furthermore, it also includes a partition plate, wherein a first notch is provided at the bottom end of the front plate portion, and a second notch is provided at the bottom end of the rear plate portion, the first notch is connected to the second notch to form a circuit channel, and the partition plate is connected between the front plate portion and the rear plate portion, and is arranged corresponding to the top end of the first notch and the top end of the second notch.

[0012] Furthermore, a second extension section is provided at the front end of the bottom plate portion, and a third extension section is provided at the front end of the partition plate corresponding to the first notch, and the second extension section and the third extension section are used for overlapping and installing with the front floor; a fourth extension section is provided at the rear end of the top plate portion, and the fourth extension section is used for overlapping and installing with the rear floor.

[0013] Furthermore, it also includes a mounting nut, which is connected to the partition plate and the bottom plate portion respectively, and the mounting nut is used to be connected to a mounting bolt to connect the second bracket and the bottom plate portion to each other.

[0014] The front cross beam of the rear floor in the utility model forms an inner cavity through the front plate portion, the rear plate portion, the top plate portion and the bottom plate portion, and can be manufactured by an aluminum alloy extrusion process, so that the front cross beam of the rear floor is a whole part, thereby reducing the number of parts. Compared with the traditional solution of using stamping parts for the front cross beam of the rear floor, the front cross beam of the rear floor in the utility model does not require mold opening, thereby reducing production costs, and its inner cavity structure improves the overall structural strength, and by offsetting the top end of the front plate portion rearward relative to the bottom end, and the top end of the rear plate portion rearward relative to the bottom end, the space requirements of functions such as the leg support structure of the seat are met, which is beneficial to the realization of vehicle cabin-related functions, and provides more space for energy storage parts such as hydrogen tanks, thereby helping to improve the vehicle's endurance.

[0015] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method. The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 This is one of the structural schematic diagrams of the front cross beam of the rear floor in the utility model;

[0018] Figure 2 This is the second structural schematic diagram of the front cross beam of the rear floor in the utility model;

[0019] Figure 3 This is the third structural schematic diagram of the front cross beam of the rear floor in the utility model;

[0020] Figure 4 This is the fourth structural diagram of the front cross beam of the rear floor in the utility model;

[0021] Figure 5 It is a schematic diagram of the front crossbeam of the rear floor in the utility model being connected to the first bracket of the seat and the second bracket of the hydrogen tank respectively.

[0022] The above drawings include the following reference numerals:

[0023] 1. Front plate; 11. Front plate section; 12. First extension section; 13. First notch; 2. Rear plate; 21. Rear plate section; 22. Second notch; 3. Top plate; 31. Fourth extension section; 4. Bottom plate; 41. Second extension section; 5. Reinforcement rib; 51. First reinforcement rib; 52. Second reinforcement rib; 53. Third reinforcement rib; 6. Partition plate; 61. Third extension section; 7. Mounting nut; 01. Inner cavity; 02. Line channel; 100. Seat; 101. First bracket; 102. Leg support structure; 200. Hydrogen tank; 201. Second bracket. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", all of which may refer to one or more of the same or different embodiments according to the present invention.

[0027] The utility model provides a front cross beam of a rear floor, comprising a front plate portion 1, a rear plate portion 2, a top plate portion 3 and a bottom plate portion 4 which are interconnected to form an inner cavity 01, the top plate portion 3 is fixedly connected to a first bracket 101, the bottom plate portion 4 is fixedly connected to a second bracket 201, the top end of the front plate portion 1 is offset rearward relative to the bottom end of the front plate portion 1, and the top end of the rear plate portion 2 is offset rearward relative to the bottom end of the rear plate portion 2.

[0028] Combination Figures 1 to 3 As shown in the figure, the X-axis represents the front and rear direction of the vehicle, the positive direction of the X-axis represents the front, and the negative direction of the X-axis represents the back; the Y-axis represents the left and right direction of the vehicle, the positive direction of the Y-axis represents the right, and the negative direction of the Y-axis represents the left; the Z-axis represents the up and down direction of the vehicle, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0029] Combination Figure 1 and Figure 2 As shown, the front plate portion 1, the rear plate portion 2, the top plate portion 3 and the bottom plate portion 4 are interconnected to form an inner cavity 01, wherein the top end of the front plate portion 1 (i.e., the end along the positive direction of the Z axis in the figure) is offset backwards (i.e., in the opposite direction of the X axis in the figure) relative to the bottom end of the front plate portion 1 (i.e., the end along the negative direction of the Z axis in the figure), that is, the top end of the front plate portion 1 tends to tilt backwards, and similarly, the top end of the rear plate portion 2 (i.e., the end along the positive direction of the Z axis in the figure) is offset backwards (i.e., in the opposite direction of the X axis in the figure) relative to the bottom end of the rear plate portion 2 (i.e., the end along the negative direction of the Z axis in the figure), that is, the top end of the rear plate portion 2 tends to tilt backwards. Combined with Figure 5As shown, a hydrogen-powered vehicle is used as an example for explanation, wherein a first bracket 101 is provided at the bottom of the seat 100, and the first bracket 101 is welded and fixed to the top plate 3, and the seat 100 has a leg support structure 102, and the leg support structure 102 is folded and retracted (such as Figure 5 The hydrogen tank 200 (i.e., the energy storage part) is installed on the bottom plate 4 through the second bracket 201, and the hydrogen tank 200 is located at the rear and downward position of the front cross beam of the rear floor. The utility model offsets the top of the front plate 1 and the top of the rear plate 2 backward so that the top of the entire front cross beam of the rear floor is offset backward relative to the bottom, so that the front and upward position of the front cross beam of the rear floor and the rear and downward position have larger space, thereby providing more space for the leg support structure 102 and the hydrogen tank 200.

[0030] Combination Figure 1 and Figure 2 As shown, the structure of the rear floor front cross beam can be manufactured by an aluminum alloy extrusion process. The inner cavity 01 is formed by the front plate portion 1, the rear plate portion 2, the top plate portion 3 and the bottom plate portion 4, which can ensure that the aluminum rear floor front cross beam has sufficient structural strength to meet the strength requirements of the rear floor front cross beam.

[0031] The front cross beam of the rear floor in the utility model forms an inner cavity 01 through the front plate portion 1, the rear plate portion 2, the top plate portion 3 and the bottom plate portion 4, and can be manufactured by an aluminum alloy extrusion process, so that the front cross beam of the rear floor is a whole part, thereby reducing the number of parts. Compared with the traditional solution of using stamping parts for the front cross beam of the rear floor, the front cross beam of the rear floor in the utility model does not require mold opening, thereby reducing the production cost. The structure of the inner cavity 01 improves the overall structural strength, and by offsetting the top end of the front plate portion 1 backward relative to the bottom end, and the top end of the rear plate portion 2 backward relative to the bottom end, the space requirements of functions such as the leg support structure 102 of the seat 100 are met, which is beneficial to the realization of vehicle cabin-related functions, and provides a larger space for energy storage parts such as the hydrogen tank 200, thereby helping to improve the vehicle's endurance.

[0032] Furthermore, the front panel portion 1 includes a plurality of front panel segments 11 connected in sequence, and the rear panel portion 2 includes a plurality of rear panel segments 21 connected in sequence, and in order from top to bottom, the angles between adjacent front panel segments 11 and the horizontal plane gradually decrease, and the angles between adjacent rear panel segments 21 and the horizontal plane gradually increase.

[0033] Combination Figure 1 and Figure 2As shown, in this embodiment, there are three front plate segments 11, which are connected in sequence, and each of the front plate segments 11 forms a certain angle with the horizontal plane (the XY plane in the figure). The angle between the topmost front plate segment 11 and the horizontal plane is set to α1, the angle between the middle front plate segment 11 and the horizontal plane is set to α2, and the angle between the bottommost front plate segment 11 and the horizontal plane is set to α3. In order from top to bottom (i.e., from the positive direction of the Z axis to the negative direction of the Z axis), α1>α2>α3; combined with Figure 1 and Figure 2 As shown, there are three rear plate segments 21 in the present embodiment, which are connected in sequence, and each rear plate segment 21 forms a certain angle with the horizontal plane. The angle between the top rear plate segment 21 and the horizontal plane is set to β1, the angle between the middle rear plate segment 21 and the horizontal plane is set to β2, and the angle between the bottom rear plate segment 21 and the horizontal plane is set to β3. In order from top to bottom, β1<β2<β3.

[0034] In this way, the front plate portion 1 and the rear plate portion 2 form a shape that is recessed into the inner cavity 01, further reducing the space occupied by the front cross beam of the rear floor, and providing more space for the seat 100 and energy storage parts such as the hydrogen tank 200.

[0035] Furthermore, the front panel portion 1 also includes a first extension section 12, the first extension section 12 is connected to the bottom end of the lowest front panel section 11, the angle between the first extension section 12 and the horizontal plane is greater than the angle between the lowest front panel section 11 and the horizontal plane, and the bottom panel portion 4 is respectively connected to the bottom end of the first extension section 12 and the bottom end of the lowest rear panel section 21.

[0036] Combination Figure 1 As shown, the bottom end of the lowest front panel segment 11 among the multiple front panel segments 11 is connected to the top end of the first extension segment 12, the bottom end of the first extension segment 12 is connected to the bottom plate portion 4, the angle between the first extension segment 12 and the horizontal plane is greater than the angle between the lowest front panel segment 11 and the horizontal plane, thereby facilitating the connection between the first extension segment 12 and the bottom plate portion 4, and the bottom end of the lowest rear panel segment 21 among the multiple rear panel segments 21 is connected to the bottom plate portion 4.

[0037] In this way, the front plate section 11 can be connected to the bottom plate portion 4 through the first extension section 12, thereby ensuring that the bottom plate portion 4 is as parallel to the horizontal plane as possible, so as to facilitate connection and installation with the second bracket 201 of the energy storage part.

[0038] Furthermore, the top plate portion 3 is connected to the top end of the uppermost front plate segment 11 and the top end of the uppermost rear plate segment 21 respectively.

[0039] Combination Figure 1As shown, the top end (i.e., the end along the positive direction of the Z axis) of the uppermost front plate segment 11 is connected to the top plate portion 3, and the top end (i.e., the end along the positive direction of the Z axis) of the uppermost rear plate segment 21 is connected to the top plate portion 3, so that the front plate segment 11 and the rear plate segment 21 can provide stable support for the top plate portion 3, thereby improving the structural strength of the top plate portion 3 and ensuring the connection reliability between the top plate portion 3 and the first bracket 101.

[0040] Furthermore, it also includes reinforcing ribs 5 , which are connected between the front plate portion 1 and the rear plate portion 2 .

[0041] Combination Figure 1 As shown, the front plate portion 1 and the rear plate portion 2 are connected by reinforcing ribs 5 arranged in the inner cavity 01. The specific shape and structure of the reinforcing ribs 5 can be designed according to needs and are not limited here.

[0042] In this way, the reinforcing ribs 5 play a reinforcing role and improve the structural strength of the front cross beam of the rear floor.

[0043] Furthermore, the reinforcing rib 5 includes a first reinforcing rib 51 and a second reinforcing rib 52, the front end of the first reinforcing rib 51 is connected to the connection between the front plate portion 1 and the top plate portion 3, the front end of the second reinforcing rib 52 is connected to the front plate portion 1, and the rear end of the first reinforcing rib 51 and the rear end of the second reinforcing rib 52 are connected to the same position of the rear plate portion 2.

[0044] Combination Figure 1 As shown, the front end of the first reinforcing rib 51 (i.e., the end along the positive direction of the X-axis in the figure) is connected to the connection between the front plate portion 1 and the top plate portion 3 (i.e., the connection between the top front plate segment 11 and the top plate portion 3), the front end of the second reinforcing rib 52 (i.e., the end along the positive direction of the X-axis in the figure) is connected to the front plate portion 1 (in this embodiment, the front end of the second reinforcing rib 52 is connected to the connection between the two top front plate segments 11), and the rear end of the first reinforcing rib 51 (i.e., the end in the opposite direction of the X-axis in the figure) and the rear end of the second reinforcing rib 52 (i.e., the end in the opposite direction of the X-axis in the figure) are connected to the same position of the rear plate portion 2 (in this embodiment, the rear end of the first reinforcing rib 51 and the rear end of the second reinforcing rib 52 are both connected to a middle rear plate segment 21 among the three rear plate segments 21).

[0045] In this way, the first reinforcing ribs 51 and the second reinforcing ribs 52 play a reinforcing role, thereby improving the structural strength of the front cross beam of the rear floor.

[0046] Preferably, the first reinforcing rib 51, the second reinforcing rib 52 and the front plate portion 1 form a triangular cross-sectional shape. Figure 1 As shown, in this embodiment, the first reinforcing rib 51, the second reinforcing rib 52 and one of the plurality of front plate segments 11 form a triangular cross-sectional shape.

[0047] In this way, the reinforcing effect of the first reinforcing rib 51 and the second reinforcing rib 52 can be further enhanced through the design of the triangular cross-section shape, thereby improving the structural strength of the rear floor front cross beam. The rear floor front cross beam manufactured using an aluminum alloy extrusion process can achieve the required structural strength.

[0048] Furthermore, the reinforcing rib 5 includes a third reinforcing rib 53 , a front end of the third reinforcing rib 53 is connected to the front plate portion 1 , and a rear end of the third reinforcing rib 53 is connected to the rear plate portion 2 .

[0049] Combination Figure 1 As shown, the front end of the third reinforcing rib 53 is connected to the front plate portion 1 , and the rear end of the third reinforcing rib 53 is connected to the rear plate portion 2 , which is equivalent to connecting the front plate portion 1 and the rear plate portion 2 through the third reinforcing rib 53 .

[0050] In this way, the third reinforcing ribs 53 play a reinforcing role, thereby further improving the structural strength of the rear floor front cross beam.

[0051] Preferably, the third reinforcing rib 53, the front plate portion 1, the second reinforcing rib 52 and the rear plate portion 2 form a quadrilateral cross-sectional shape. Figure 1 As shown, the front end of the third reinforcing rib 53 is connected to the connection between the two lowest front plate segments 11, and the rear end of the third reinforcing rib 53 is connected to a middle rear plate segment 21 among the three rear plate segments 21. The third reinforcing rib 53, the front plate segment 11, the second reinforcing rib 52 and a part of the rear plate segment 21 together form a quadrilateral cross-sectional shape, thereby further improving the structural strength of the rear floor front cross beam. When the rear floor front cross beam is manufactured by aluminum alloy extrusion process, the structural strength can still be guaranteed to meet the requirements.

[0052] Furthermore, it also includes a partition plate 6, the bottom end of the front plate portion 1 is provided with a first notch 13, the bottom end of the rear plate portion 2 is provided with a second notch 22, the first notch 13 is connected to the second notch 22 to form a line channel 02, the partition plate 6 is connected between the front plate portion 1 and the rear plate portion 2, and is arranged corresponding to the top end of the first notch 13 and the top end of the second notch 22.

[0053] Combination Figure 1 As shown, the front end of the partition plate 6 (i.e., the end along the positive direction of the X-axis) is connected to the first extension section 12 of the front plate portion 1, and the rear end of the partition plate 6 (i.e., the end along the negative direction of the X-axis) is connected to the connection between the two rear plate sections 21 at the bottom. Figures 2 to 4As shown, the front plate portion 1 is provided with a first notch 13, and the rear plate portion 2 is provided with a second notch 22. When viewed along the X-axis, the positions of the first notch 13 and the second notch 22 correspond to each other and are connected to form a line channel 02 arranged along the X-axis, through which relevant lines in the vehicle can pass. The front end (i.e., the end in the positive direction along the X-axis) and the rear end (i.e., the end in the negative direction along the X-axis) of the partition plate 6 are respectively arranged to correspond to the top end of the first notch 13 (i.e., the end in the positive direction along the Z-axis) and the top end of the second notch 22 (i.e., the end in the positive direction along the Z-axis), so that the partition plate 6 separates the inner cavity 01 and the line channel 02.

[0054] In this way, a line channel 02 is formed by the first notch 13 and the second notch 22 to facilitate the passage of lines in the vehicle, and the inner cavity 01 and the line channel 02 are separated by the setting of the partition plate 6 to ensure the structural strength of the front cross beam of the rear floor.

[0055] Furthermore, a second extension section 41 is provided at the front end of the bottom plate 4, and a third extension section 61 is provided at the front end of the partition plate 6 corresponding to the first notch 13, and the second extension section 41 and the third extension section 61 are used for overlapping installation with the front floor.

[0056] Combination Figure 1 As shown, the second extension section 41 extends forward from the position on the front plate portion 1 corresponding to the front end of the bottom plate portion 4, and a third extension section 61 is provided at the front end of the partition plate 6 corresponding to the first notch 13. The third extension section 61 extends forward from the position on the front plate portion 1 corresponding to the front end of the partition plate 6. Figure 2 As shown, it can be seen that the third extension section 61 is located at the center of the front cross beam of the rear floor on the Y-axis, and the two second extension sections 41 are respectively located on the positive and negative sides of the front cross beam of the rear floor on the Y-axis. The second extension section 41 and the third extension section 61 provide installation surfaces, which can be overlapped and installed with the front floor, thereby facilitating the assembly between the front floor and the front cross beam of the rear floor.

[0057] Preferably, a fourth extension section 31 is provided at the rear end of the top plate portion 3, and the fourth extension section 31 is used for overlapping and installing with the rear floor.

[0058] Combination Figure 1 and Figure 2 As shown, the rear end of the top plate portion 3 is provided with a fourth extension section 31, and the fourth extension section 31 extends rearward from a position on the rear plate portion 2 corresponding to the rear end of the top plate portion 3. The fourth extension section 31 provides an installation surface, which can be overlapped and installed with the rear floor, thereby facilitating the assembly between the rear floor and the front cross beam of the rear floor.

[0059] Furthermore, it also includes a mounting nut 7, which is connected to the partition plate 6 and the bottom plate portion 4 respectively, and the mounting nut 7 is used to be connected with a mounting bolt to connect the second bracket 201 and the bottom plate portion 4 to each other.

[0060] Combination Figure 1 and Figure 5 As shown, the mounting nut 7 is a pull rivet nut, the top end (i.e., the end along the positive direction of the Z axis) of which is riveted to the partition plate 6, and the bottom end (i.e., the end along the negative direction of the Z axis) is riveted to the bottom plate portion 4. A mounting hole is correspondingly provided on the second bracket 201, and the mounting bolt passes through the mounting hole and is connected and cooperated with the mounting nut 7, so that the second bracket 201 is assembled together with the bottom plate portion 4 of the front cross beam of the rear floor.

[0061] In this way, by setting the mounting nut 7, the bottom plate portion 4 and the second bracket 201 are connected by the mounting bolts, thereby improving the connection stability between the bottom plate portion 4 and the second bracket 201.

[0062] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways, rotated 90 degrees or in other orientations, and the spatially relative descriptions used herein are interpreted accordingly.

[0064] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present utility model.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A front cross beam of a rear floor, characterized in that: It includes a front plate portion, a rear plate portion, a top plate portion and a bottom plate portion which are interconnected to form an inner cavity, the top plate portion is fixedly connected to a first bracket, the bottom plate portion is fixedly connected to a second bracket, the top end of the front plate portion is offset rearward relative to the bottom end of the front plate portion, and the top end of the rear plate portion is offset rearward relative to the bottom end of the rear plate portion.

2. The rear floor front cross beam according to claim 1, characterized in that: The front plate portion includes a plurality of front plate segments connected in sequence, and the rear plate portion includes a plurality of rear plate segments connected in sequence. From top to bottom, the angles between adjacent front plate segments and the horizontal plane gradually decrease, and the angles between adjacent rear plate segments and the horizontal plane gradually increase.

3. The rear floor front cross beam according to claim 2, characterized in that: The front panel portion also includes a first extension section, which is connected to the bottom end of the lowest front panel section, and an angle between the first extension section and a horizontal plane is greater than an angle between the lowest front panel section and the horizontal plane, and the bottom panel portion is respectively connected to the bottom end of the first extension section and the bottom end of the lowest rear panel section.

4. The rear floor front cross beam according to claim 2, characterized in that: The top plate portion is connected to the top end of the uppermost front plate segment and the top end of the uppermost rear plate segment respectively.

5. The rear floor front cross member according to claim 1, characterized in that: It also includes reinforcing ribs connected between the front plate portion and the rear plate portion.

6. The rear floor front cross member according to claim 5, characterized in that: The reinforcing ribs include a first reinforcing rib and a second reinforcing rib, the front end of the first reinforcing rib is connected to the connection between the front plate portion and the top plate portion, the front end of the second reinforcing rib is connected to the front plate portion, and the rear ends of the first reinforcing rib and the second reinforcing rib are connected to the same position of the rear plate portion; the first reinforcing rib, the second reinforcing rib and the front plate portion form a triangular cross-sectional shape.

7. The rear floor front cross member according to claim 6, characterized in that: The reinforcing ribs include a third reinforcing rib, a front end of the third reinforcing rib is connected to the front plate portion, and a rear end of the third reinforcing rib is connected to the rear plate portion; the third reinforcing rib, the front plate portion, the second reinforcing rib and the rear plate portion form a quadrilateral cross-sectional shape.

8. The rear floor front cross member according to claim 1, characterized in that: It also includes a partition plate, wherein a first notch is provided at the bottom end of the front plate portion, and a second notch is provided at the bottom end of the rear plate portion, the first notch is connected to the second notch to form a circuit channel, and the partition plate is connected between the front plate portion and the rear plate portion, and is arranged corresponding to the top end of the first notch and the top end of the second notch.

9. The rear floor front cross member according to claim 8, characterized in that: A second extension section is provided at the front end of the bottom plate portion, and a third extension section is provided at the front end of the partition plate corresponding to the first notch, and the second extension section and the third extension section are used for overlapping and installing with the front floor; a fourth extension section is provided at the rear end of the top plate portion, and the fourth extension section is used for overlapping and installing with the rear floor.

10. The rear floor front cross member according to claim 9, characterized in that: It also includes a mounting nut, which is connected to the partition plate and the bottom plate portion respectively, and is used to be connected to a mounting bolt to connect the second bracket and the bottom plate portion to each other.

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