CN110979473B - Rear vehicle body lower part assembly - Google Patents

Abstract

The present invention discloses a rear lower body component, including a rear floor assembly, a rear frame assembly and a rear end plate assembly, wherein the rear floor assembly includes a rear floor body, a rear floor cross beam-connecting plate fixedly connected to the front floor, the rear frame assembly includes a rear floor cross beam-1 and a rear beam, the rear floor cross beam-1 is fixedly connected to the rear beam, the rear floor cross beam-1 and the rear beam are both fixedly connected to the lower part of the rear floor body, the rear floor cross beam-1 connecting plate, the rear floor cross beam-1 and the rear floor body are surrounded to form a rear floor cross beam-1 cavity, the X-direction length of the rear floor cross beam-1 cavity is greater than or equal to 80 mm, and a floor rail mounting point is provided on the upper part of the rear floor cross beam-1 connecting plate. A rear lower body component of the present invention is provided with a floor rail mounting point on the length of the rear floor cross beam-1 cavity in the X direction, which is used for the Z-direction installation of the second row of seat floor rails and is compatible with ordinary seat rails.

Description

A rear lower body assembly

Technical Field

The invention relates to a vehicle body technology, in particular to a rear vehicle body lower component.

Background Art

The existing rear lower body components include a rear floor assembly, a rear end panel assembly and a rear beam assembly. The rear lower body components have some shortcomings: (i) The X-direction dimension M of the cavity formed by the rear floor crossbeam 01 and the rear floor crossbeam connecting plate 02 is small (<60 mm), as shown in Figures 1 and 2. The cavity is small and can only provide ordinary guide rail installation in the X direction. It cannot provide a ground guide rail installation point in the Z direction. The compatibility of various seat installations is poor, which reduces the quality and comfort of passenger cars; (ii) The spare tire is arranged in the car, occupying the luggage compartment space and not convenient for loading and unloading the spare tire; (iii) There is no battery installation point, and later models cannot be upgraded to hybrid or cannot be equipped with hybrid configurations. The products are not rich and the customer selection is narrow, resulting in weak product competitiveness; (iv) As shown in Figures 3 and 4, the rear end panel 03 is only connected to the end of the rear beam 04 on one side, the rear end panel cavity and the beam cavity are staggered in the Z direction, the cavity is not connected, the tailgate frame modality is low, and the NVH noise is large.

Summary of the invention

The present invention is completed to solve the deficiencies in the prior art. The purpose of the present invention is to provide a rear body lower component, which has the advantage that a floor slide rail mounting point is provided on the length of the cavity of the rear floor cross beam in the X direction, which is used for the Z direction installation of the second row seat floor slide rail and is compatible with the rear floor cross beam of the ordinary seat guide rail.

A rear vehicle body lower component of the present invention comprises a rear floor assembly, a rear frame assembly and a rear end plate assembly, wherein the rear frame assembly is fixedly connected to the bottom of the rear floor assembly, the rear end plate assembly is fixedly connected to the rear of the rear floor assembly, the rear end of the rear frame assembly is fixedly connected to the rear end plate assembly, the rear floor assembly comprises a rear floor body, a rear floor cross beam-connecting plate is fixedly connected to the front floor, the rear frame assembly comprises a rear floor cross beam-1 and a rear beam, the rear floor cross beam-1 is fixedly connected to the rear beam, the rear floor cross beam-1 and the rear beam are both fixedly connected to the lower part of the rear floor body, the rear floor cross beam-1 connecting plate, the rear floor cross beam-1 and the rear floor body are surrounded by a rear floor cross beam-1 cavity, the X-direction length of the rear floor cross beam-1 cavity is greater than or equal to 80 mm, and a floor slide rail mounting point is arranged on the upper part of the rear floor cross beam-1 connecting plate.

A rear lower body component of the present invention may also be:

A spare tire mounting plate is detachably fixedly connected to the upper rear end of the rear floor body, a spare tire cavity is surrounded between the spare tire mounting plate and the lower part of the rear floor body, and the spare tire is detachably fixed below the rear floor body below the spare tire cavity.

The spare tire mounting plate is provided with an opening, and the spare tire lifter is downwardly penetrated through the opening and is detachably fixedly connected to the spare tire.

A spare tire winch mounting plate is detachably fixedly connected to the right side portion of the rear end of the rear floor body, a spare tire winch mounting plate is detachably fixedly connected to a spare tire cable, one end of the spare tire cable is connected to the spare tire lifter, and the end of the spare tire cable is detachably fixedly connected to the spare tire.

A battery mounting inner bracket and a parallel battery mounting outer front bracket and a battery mounting outer rear bracket are arranged on the left side of the rear end of the rear floor body. The battery mounting inner bracket is arranged parallel to the battery mounting outer front bracket and the battery mounting outer rear bracket and forms a plane shape in the shape of a triangle; the battery mounting inner bracket, the top of the battery mounting outer front bracket and the top of the battery mounting outer rear bracket are all detachably fixedly connected with a BSG power battery.

A cooling pipe line is formed between the battery mounting inner bracket, the battery mounting outer front bracket, and the battery mounting outer rear bracket, and the cooling pipe line is passed upward from the bottom of the rear floor body.

At least one battery mounting hole is provided on the upper parts of the battery mounting inner bracket, the battery mounting outer front bracket and the battery mounting outer rear bracket.

The longitudinal cross-section of the battery mounting inner bracket is in the shape of a "X", and inner bracket flanges are respectively arranged on the left and right sides of the battery mounting inner bracket, and the inner bracket flanges are fixedly connected to the rear floor body.

The longitudinal cross-section shape of the battery mounting outer front bracket and the battery mounting outer rear bracket are both in the shape of a "J", front bracket flanges are arranged on both sides of the battery mounting outer front bracket, rear bracket flanges are arranged on both sides of the battery mounting outer rear bracket, the battery mounting outer front bracket and the battery mounting outer rear bracket are both arranged directly above the rear beam, beam flanges are arranged on both sides of the rear beam, the front bracket flange, the rear floor body and the beam flange are fixedly connected from top to bottom in sequence, and the rear bracket flange, the rear floor body and the beam flange are fixedly connected from top to bottom in sequence.

The rear end panel assembly includes a rear end panel outer panel and a rear end panel inner panel, the upper end of the rear end panel outer panel is fixedly connected to the upper end of the rear end panel inner panel, a rear end panel cavity is formed between the rear end panel outer panel and the rear end panel inner panel, the lower end of the rear end panel inner panel is fixedly connected to the rear floor body, the rear beam and the rear floor body are surrounded to form a rear beam cavity, and the rear end panel cavity is connected to the rear beam cavity.

A rear vehicle body lower component of the present invention comprises a rear floor assembly, a rear frame assembly and a rear end plate assembly, wherein the rear frame assembly is fixedly connected to the bottom of the rear floor assembly, the rear end plate assembly is fixedly connected to the rear part of the rear floor assembly, the rear end of the rear frame assembly is fixedly connected to the rear end plate assembly, the rear floor assembly comprises a rear floor body, a rear floor cross beam-connecting plate is fixedly connected to the front floor, the rear frame assembly comprises a rear floor cross beam-1 and a rear beam, the rear floor cross beam-1 is fixedly connected to the rear beam, the rear floor cross beam-1 and the rear beam are both fixedly connected to the lower part of the rear floor body, the rear floor cross beam-1 connecting plate, the rear floor cross beam-1 and the rear floor body are surrounded to form a rear floor cross beam-1 cavity, the X-direction length of the rear floor cross beam-1 cavity is greater than or equal to 80 mm, and a ground slide rail mounting point is arranged on the upper part of the rear floor cross beam-1 connecting plate. In this way, the rear frame assembly is connected to the bottom of the rear floor assembly, and its connection can be other connection methods. The rear end plate assembly is connected to the rear of the rear floor assembly, and the connection can be other connection methods. The rear end of the rear frame assembly is connected to the rear end plate assembly, and the connection can be other connection methods. The rear floor assembly includes a rear floor body. The rear floor cross beam-connecting plate is located on the front floor, and plays a connecting role between the front floor and the rear floor assembly, and the connection can be other connection methods. The rear floor cross beam-1 is horizontally arranged and connected to the bottom of both sides of the front end of the rear floor body, and the rear beam is longitudinally arranged on both sides of the bottom of the rear floor body, wherein the rear floor cross beam-1 is connected to the rear beam. The rear floor cross beam-1 connecting plate, the rear floor cross beam-1 and the rear floor body are surrounded to form a rear floor cross beam-1 cavity, wherein the rear floor cross beam-1 cavity is greater than or equal to 80mm in length in the X direction. A ground slide rail mounting point is arranged on the upper surface of the rear floor cross beam-1 cavity in the X direction, which is used for the Z-direction mounting of the second row seat ground slide rail. The front and rear mounting points of the second row seat are horizontal without an inclination angle, and can also be compatible with ordinary seat rails, with good assembly compatibility and good riding comfort. The rear vehicle body lower component of the present invention has the following advantages over the prior art: a floor rail mounting point is provided on the length of the cavity of the rear floor crossbeam in the X direction for the Z direction installation of the second row seat floor rail, and is compatible with the rear floor crossbeam of the common seat rail.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of an existing rear lower body assembly.

FIG. 2 is a partial cross-sectional schematic diagram of FIG. 1 .

FIG. 3 is a partial schematic diagram of an existing rear lower body assembly.

Fig. 4 is a schematic cross-sectional view of the A-A section of Fig. 3 .

FIG. 5 is a schematic diagram of a rear lower body assembly of the present invention.

FIG6 is a schematic cross-sectional view of FIG5 taken along line B-B.

FIG. 7 is a schematic diagram of assembling a spare tire of a rear lower body assembly according to the present invention.

FIG. 8 is another schematic diagram of the spare tire assembly of the rear lower body assembly of the present invention.

FIG9 is a schematic cross-sectional view of FIG8 taken along line C-C.

FIG. 10 is a schematic diagram of a BSG power battery assembly of a rear lower body assembly of the present invention.

FIG. 11 is a partial schematic diagram of a BSG power battery assembly of a rear lower body assembly of the present invention.

Fig. 12 is a schematic cross-sectional view taken along line D-D of Fig. 11 .

Description of Figure Number

1. Rear floor body; 2. Rear floor crossbeam-connecting plate; 3. Rear floor crossbeam-1; 4. Rear beam; 6. Floor slide rail mounting point; 7. Spare tire mounting plate; 8. Spare tire; 9. Opening; 10. Spare tire lifter; 11. Spare tire winch mounting plate; 12. Spare tire cable; 13. Battery mounting inner bracket; 14. Battery mounting outer front bracket; 15. Battery mounting outer rear bracket; 16. BSG power battery; 17. Refrigeration pipe pipeline; 18. Battery mounting hole; 19. Rear end panel outer plate; 20. Rear end panel inner plate; 21. Rear end panel cavity; 22. Rear beam cavity.

DETAILED DESCRIPTION

A rear vehicle body lower component of the present invention is further described in detail below with reference to FIGS. 5 to 12 of the accompanying drawings.

A rear vehicle body lower component of the present invention, please refer to the relevant figures of Figures 5 to 12, includes a rear floor assembly, a rear frame assembly and a rear end plate assembly, the rear frame assembly is fixedly connected to the bottom of the rear floor assembly, the rear end plate assembly is fixedly connected to the rear of the rear floor assembly, the rear end of the rear frame assembly is fixedly connected to the rear end plate assembly, the rear floor assembly includes a rear floor body 1, a rear floor beam-connecting plate 2 is fixedly connected to the front floor, the rear frame assembly includes a rear floor beam-3 and a rear beam 4, the rear floor beam-3 is fixedly connected to the rear beam 4, the rear floor beam-3 and the rear beam 4 are both fixedly connected to the lower part of the rear floor body 1, the rear floor beam-connecting plate 2, the rear floor beam-3 and the rear floor body 1 are surrounded to form a rear floor beam-cavity, the X-direction length of the rear floor beam-cavity is greater than or equal to 80 mm, and the upper part of the rear floor beam-connecting plate 2 is provided with a ground slide rail mounting point 6. In this way, the rear frame assembly is connected to the bottom of the rear floor assembly, and its connection can be other connection methods. The rear end plate assembly is connected to the rear of the rear floor assembly, and its connection can be other connection methods. The rear end of the rear frame assembly is connected to the rear end plate assembly, and its connection can be other connection methods. The rear floor assembly includes a rear floor body 1. The rear floor cross beam-connecting plate 2 is located on the front floor, and plays a connecting role between the front floor and the rear floor assembly, and its connection can be other connection methods. The rear floor cross beam-3 is horizontally arranged and connected to the bottom of both sides of the front end of the rear floor body 1, and the rear beam 4 is longitudinally arranged on both sides of the bottom of the rear floor body 1, wherein the rear floor cross beam-3 is connected to the rear beam 4. The rear floor cross beam-connecting plate 2, the rear floor cross beam-3 and the rear floor body are surrounded to form a rear floor cross beam-cavity, wherein the rear floor cross beam-cavity is greater than or equal to 80mm in length in the X direction. A floor rail mounting point 6 is provided on the upper surface of the cavity of the rear floor beam in the X direction, which is used for the Z direction mounting of the floor rail of the second row of seats. The front and rear mounting points of the second row of seats are horizontal without an inclination angle, and are also compatible with ordinary seat rails, with good assembly compatibility and good riding comfort. A rear body lower component of the present invention has the following advantages over the prior art: a floor rail mounting point 6 is provided on the length of the cavity of the rear floor beam in the X direction, which is used for the Z direction mounting of the floor rail of the second row of seats, and is compatible with the rear floor beam of the ordinary seat rail.

A rear lower body assembly of the present invention, please refer to the relevant figures of Figures 5 to 12, based on the previous technical solution, can also be: the upper rear end of the rear floor body 1 is detachably fixedly connected with a spare tire mounting plate 7, a spare tire cavity is surrounded between the spare tire mounting plate 7 and the lower part of the rear floor body 1, and the spare tire 8 is detachably fixed below the rear floor body 1 below the spare tire cavity. In this way, the upper rear end of the rear floor body 1 is connected to the spare tire mounting plate 7, and the connection between the rear floor body 1 and the spare tire mounting plate 7 can also be released, which is convenient for disassembly. The spare tire mounting plate 7 and the rear floor body 1 form a spare tire cavity, through which the structural strength and rigidity of the rear floor body 1 in the spare tire 8 mounting area can be effectively improved. Then the spare tire 8 is installed at the lower part of the rear floor body 1 below the spare tire cavity. Under the compressive stress, the structure above the entire rear floor body 1 can be used to resist deformation, thereby improving the strength and stability of the installation. The spare tire mounting plate 7 is located above the surface of the rear floor body 1. When the Z-direction length of the spare tire cable 12 is constant, more space is left for the spare tire 8 below the rear floor body 1. Under the same ground clearance condition of the spare tire 8, the floor surface at the spare tire 8 can also be lowered, thereby increasing the volume of the luggage box. The spare tire mounting plate 7 is directly connected to the rear floor body 1 to form a welded part, which can improve the rigidity of the rear floor body 1, facilitate the transportation and manufacturing of parts, and facilitate the overall part quality of the rear lower body assembly. A further preferred technical solution is: an opening 9 is opened on the spare tire mounting plate 7, and a spare tire lifter 10 is arranged downward through the opening 9 and is detachably fixedly connected to the spare tire 8. In this way, an opening 9 is provided on the spare tire mounting plate 7, and a spare tire lifter 10 is inserted into the opening 9 of the spare tire mounting plate 7 and connected to the spare tire 8, and the connection between the spare tire 8 and the spare tire lifter 10 can also be released. The connection between the spare tire mounting plate 7 and the rear floor body 1 is subjected to compressive stress under the action of the gravity of the spare tire 8, and the structure above the entire rear floor body 1 can be used to resist deformation, thereby improving the strength and stability of the installation. A further preferred technical solution is: a spare tire winch mounting plate 11 is detachably fixedly connected to the right side of the rear end of the rear floor body 1, and a spare tire cable 12 is detachably fixedly connected to the spare tire winch mounting plate 11, one end of the spare tire cable 12 is connected to the spare tire lifter 10, and the end of the spare tire cable 12 is detachably fixedly connected to the spare tire 8. In this way, the spare tire winch mounting plate 11 is connected to the right side of the rear end of the rear floor body 1, and the connection between the spare tire winch mounting plate 11 and the rear floor body 1 can also be released. The spare tire winch mounting plate 11 provides a mounting point for the mounting bolts of the spare tire lifter 10. One end of the spare tire cable 12 is connected to the spare tire winch mounting plate 11. By adjusting the mounting bolts of the spare tire lifter 10, the length of the spare tire cable 12 can be adjusted; the other end of the spare tire cable 12 passes through the opening 9 of the spare tire mounting plate 7 and is connected to the spare tire 8. When the spare tire 8 is needed, the spare tire 8 is lifted by the spare tire lifter 10, and the connection between the spare tire 8 and the spare tire cable 12 is released. The spare tire mounting plate 7 and the spare tire winch mounting plate 11 are arranged inside the vehicle to solve the rust problem exposed outside the vehicle. The spare tire 8 is arranged outside the vehicle to facilitate the removal of the spare tire 8; the installation position of the spare tire 8 is sunken, and under the condition of meeting the installation requirements of the spare tire 8, more space is given to the tool box in the trunk.

A rear vehicle lower body assembly of the present invention, please refer to the relevant figures of Figures 5 to 12, on the basis of the previous technical solution, it can also be: the left side of the rear end of the rear floor body 1 is provided with a battery mounting inner bracket 13 and a parallel battery mounting outer front bracket 14 and a battery mounting outer rear bracket 15, the battery mounting inner bracket 13 is arranged in parallel with the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 and forms a plane shape in the shape of a Chinese character "品", and the battery mounting inner bracket 13, the top of the battery mounting outer front bracket 14 and the top of the battery mounting outer rear bracket 15 are all detachably fixedly connected with a BSG power battery 16. In this way, the battery mounting inner bracket 13 is extended forward and backward, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 are arranged in parallel, wherein the battery mounting inner bracket 13 is arranged in parallel with the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15, and the battery mounting inner bracket 13, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 form a Chinese character "品". The BSG power battery 16 is connected to the top of the battery mounting inner bracket 13, the top of the battery mounting outer front bracket 14 and the top of the battery mounting outer rear bracket 15. The BSG power battery 16 can also be released from the top of the battery mounting inner bracket 13, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15, which facilitates the installation and removal of the BSG power battery 16. Three points that are not on the same straight line can determine a plane. The battery mounting inner bracket 13, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 provide at least three installation points for the BSG power battery 16. The BSG power battery 16 is installed on three brackets to improve the stability of the installation of the BSG power battery 16. The top of the battery mounting inner bracket 13, the top of the battery mounting outer front bracket 14 and the top of the battery mounting outer rear bracket 15 provide reserved installation points for the optional BSG power battery 16, which solves the problem that traditional models cannot be equipped with the BSG power battery 16, and meets the needs of customers to upgrade traditional models to hybrid models in the future. Compared with traditional models, hybrid models are conducive to reducing automobile fuel consumption, improving fuel economy and environmental protection. The BSG power battery 16 is installed above the rear floor body 1. Compared with hoisting the BSG power battery 16 below the rear floor body 1, there is no risk of the BSG power battery 16 falling, making the installation structure simpler. Only three mounting brackets are required to achieve the installation of the BSG power battery 16 and fix it reliably. At the same time, the mounting bracket is small in size, flexible in layout, and saves space, which is conducive to the lightweight requirements of the car and reduces the fuel consumption of the car. If the traditional car model is not equipped with a BSG power battery 16, the battery mounting inner bracket 13, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 can be used as the installation point of a conventional tool box, which is conducive to improving the utilization rate of the installation components and the stability of the conventional tool box. A further preferred technical solution is: a refrigeration pipe line 17 is formed between the battery mounting inner bracket 13 and the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15, and the refrigeration pipe line 17 is passed upward from the bottom of the rear floor body 1. In this way, the refrigeration pipe 17 is passed upward from the bottom of the rear floor body 1 between the battery mounting inner bracket 13 and the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15, so as to realize the function of the refrigeration pipe 17 running from indoors to outdoors. The refrigeration pipe 17 is arranged between the three brackets to improve the effective utilization rate of space. Preferably, a pipe hole is provided on the rear floor body 1 between the three mounting brackets, and the pipe hole can be an oblong through hole, which is used to pass the refrigeration pipe 17, thereby improving the effective utilization rate of space. A further preferred technical solution is that at least one battery mounting hole 18 is provided on the upper part of the battery mounting inner bracket 13, the battery mounting outer front bracket 14, and the battery mounting outer rear bracket 15. In this way, one or more battery mounting holes 18 are provided on the battery mounting inner bracket 13, one or more battery mounting holes 18 are provided on the battery mounting outer front bracket 14, and one or more battery mounting holes 18 are provided on the battery mounting outer rear bracket 15. The number of battery mounting holes 18 is set according to actual conditions. The battery mounting hole 18 provides a mounting point for the BSG power battery 16. Three points that are not on the same straight line can determine a plane. The battery mounting inner bracket 13, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 provide at least three mounting points for the BSG power battery 16. The BSG power battery 16 is mounted on the three brackets to improve the stability of the installation of the BSG power battery 16. The top of the battery mounting inner bracket 13, the top of the battery mounting outer front bracket 14 and the top of the battery mounting outer rear bracket 15 provide reserved mounting points for the optional BSG power battery 16, which solves the problem that the BSG power battery 16 cannot be selected for traditional models, and meets the needs of customers to upgrade traditional models to hybrid models in the later stage. Compared with traditional models, hybrid models are conducive to reducing automobile fuel consumption, improving fuel economy and environmental protection. It can also be that the longitudinal section of the battery mounting inner bracket 13 is a "J" shape, and the left and right sides of the battery mounting inner bracket 13 are respectively provided with inner bracket flanges, and the inner bracket flanges are fixedly connected to the rear floor body 1. In this way, the battery mounting inner bracket 13 in the shape of an “X” has a strong bearing capacity, is sturdy and durable, and the top surface of the middle part of the battery mounting inner bracket 13 in the shape of an “X” is a plane, which is conducive to the connection between the battery mounting inner bracket 13 and the BSG power battery 16. The battery mounting inner bracket 13 is provided with inner bracket flanges on both sides of the “X”-shaped battery mounting inner bracket 13, and the battery mounting inner bracket 13 is connected to the rear floor body 1 through the inner bracket flanges, which increases the area of the connection surface between the two, and the connection is more stable, thereby improving the strength and stability of the BSG power battery 16 installation structure. Preferably, the rear floor body 1 is provided with ribs in the same extension direction as the inner bracket, and the two ends of the bracket flange are fixedly connected to the ribs, which improves the connection strength of the bracket flange connected to the rear floor body 1. Alternatively, the longitudinal cross-sectional shapes of the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 are both in the shape of a "J", the front bracket flanges are provided on both sides of the battery mounting outer front bracket 14, the rear bracket flanges are provided on both sides of the battery mounting outer rear bracket 15, the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 are both arranged directly above the rear beam 4, the beam flanges are provided on both sides of the rear beam 4, the front bracket flanges, the rear floor body 1 and the beam flanges are fixedly connected from top to bottom in sequence, and the rear bracket flanges, the rear floor body 1 and the beam flanges are fixedly connected from top to bottom in sequence. In this way, the longitudinal cross-sectional shapes of the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 are both in the shape of a "J", the "J"-shaped bracket has a strong bearing capacity, is sturdy and durable, and the top surface of the middle part of the "J"-shaped bracket is a plane, which is conducive to the connection of the battery mounting outer front bracket 14, the battery mounting outer rear bracket 15 and the BSG power battery 16. The front bracket 14 for battery installation is provided with a front bracket flange, and the rear bracket 15 for battery installation is provided with an outer bracket flange. The front bracket 14 for battery installation is connected to the rear floor body 1 through the front bracket flange, and the rear bracket 15 for battery installation is connected to the rear floor body 1 through the rear bracket flange, which increases the area of the connection surface with the rear floor body 1 and makes the connection more stable, thereby improving the strength and stability of the BSG power battery 16 installation structure. The front bracket 14 for battery installation and the rear bracket 15 for battery installation are both arranged directly above the rear beam cavity 22. At the same time, a beam flange is provided on the rear beam 4, which are, from top to bottom, the front bracket flange/rear bracket flange, the rear floor body 1, and the beam flange. When the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 are subjected to downward pressure from the BSG power battery 16, the pressure can be transferred to the beam flange through the front bracket flange and the rear bracket flange respectively, and then transferred to the rear beam cavity 22, which is beneficial to the force dispersion, thereby improving the structural strength of the battery mounting outer front bracket 14 and the battery mounting outer rear bracket 15 and ensuring their reliability and stability.

A rear vehicle body lower component of the present invention, please refer to the relevant figures of Figures 5 to 12, on the basis of the previous technical solution, it can also be: the rear panel assembly includes a rear panel outer panel 19 and a rear panel inner panel 20, the upper end of the rear panel outer panel is fixedly connected to the upper end of the rear panel inner panel 20, a rear panel cavity 21 is formed between the rear panel outer panel 19 and the rear panel inner panel 20, the lower end of the rear panel inner panel 20 is fixedly connected to the rear floor body 1, the rear beam 4 and the rear floor body 1 are surrounded to form a rear beam cavity 22, and the rear panel cavity is connected to the rear beam cavity 22. In this way, the rear panel outer panel 19 and the rear panel inner panel 20 are fixedly connected, and the connection can be in other ways. The rear panel cavity 21 is formed between the rear panel outer panel 19 and the rear panel inner panel 20. The lower end of the rear panel inner panel 20 extends to the upper end of the rear floor body 1 and is fixedly connected to the rear floor body 1, and the connection can be in other ways. The rear beam 4 and the rear floor body 1 are surrounded to form a rear beam cavity 22, wherein the rear beam cavity 22 is connected to the rear end plate cavity 21. By setting the rear end plate cavity 21 to be connected to the rear beam cavity 22, the tailgate frame modal height is increased, the NVH noise is reduced, and the quality of the passenger car is improved.

The above only describes several specific embodiments of the present invention, but cannot be regarded as the protection scope of the present invention. Any equivalent changes or modifications or proportional enlargement or reduction made according to the design spirit of the present invention should be considered to fall within the protection scope of the present invention.

Claims (10)

1. A rear underbody assembly, characterized in that: including rear floor assembly, back frame assembly and back end plate assembly, back frame assembly fixed connection in rear floor assembly bottom, back end plate assembly fixed connection in rear floor assembly rear portion, back frame assembly rear end with back end plate assembly fixed connection, rear floor assembly includes rear floor body (1), rear floor crossbeam connecting plate (2) fixed connection on the preceding floor, rear frame assembly includes rear floor crossbeam (3) and back girder (4), rear floor crossbeam (3) fixed connection is on back girder (4), rear floor crossbeam (3) with back girder (4) all fixed connection in rear floor body (1) lower part, rear floor crossbeam connecting plate (2) rear floor crossbeam (3) with rear floor body (1) enclose and are formed with rear floor crossbeam cavity, rear floor crossbeam cavity's X is to length more than or equal to 80mm, rear floor crossbeam connecting plate (2) upper portion is provided with mounting point rail (6).

2. A rear underbody assembly as claimed in claim 1, wherein: the detachable and fixedly connected spare tire mounting plate (7) on the upper portion of the rear end of the rear floor body (1), a spare tire cavity is surrounded between the spare tire mounting plate (7) and the lower portion of the rear floor body (1), and a spare tire (8) is detachably fixed below the spare tire cavity below the rear floor body (1).

3. A rear underbody assembly as claimed in claim 2, wherein: an opening (9) is formed in the spare tire mounting plate (7), and a spare tire lifter (10) penetrates through the opening (9) downwards and is detachably and fixedly connected with the spare tire (8).

4. A rear underbody assembly as claimed in claim 3, wherein: the novel automobile spare tire lifting device is characterized in that a spare tire winch mounting plate (11) is detachably and fixedly connected to the right side portion of the rear end of the rear floor body (1), a spare tire inhaul cable (12) is detachably and fixedly connected to the spare tire winch mounting plate (11), one end of the spare tire inhaul cable (12) is connected with the spare tire lifting device (10), and the tail end of the spare tire inhaul cable (12) is detachably and fixedly connected with the spare tire (8).

5. A rear underbody assembly as claimed in any one of claims 1-4 wherein: the novel solar energy power battery is characterized in that a battery installation inner support (13) and a battery installation outer front support (14) and a battery installation outer rear support (15) which are arranged in parallel are arranged on the left side of the rear end of the rear floor body (1), the battery installation inner support (13) and the battery installation outer front support (14) are arranged in parallel, the battery installation outer rear support (15) is formed into a triangular shape, and the top of the battery installation inner support (13) and the top of the battery installation outer front support (14) and the top of the battery installation outer rear support (15) are all detachably and fixedly connected with a BSG power battery (16).

6. A rear underbody assembly as claimed in claim 5, wherein: a refrigerating pipe pipeline (17) is formed between the battery installation inner support (13) and the battery installation outer front support (14) and between the battery installation outer rear support (15), and the refrigerating pipe pipeline (17) is upwards penetrated by the bottom of the rear floor body (1).

7. A rear underbody assembly as set forth in claim 6 wherein: the battery mounting inner support (13), the battery mounting outer front support (14) and the battery mounting outer rear support (15) are provided with at least one battery mounting hole (18) on the upper part.

8. A rear underbody assembly as set forth in claim 7 wherein: the longitudinal section of the battery installation inner support (13) is in a shape like a Chinese character 'ji', inner support flanging is respectively arranged on the left side and the right side of the battery installation inner support (13), and the inner support flanging is fixedly connected with the rear floor body (1).

9. A rear underbody assembly as set forth in claim 7 wherein: the battery mounting outer front support (14) and the battery mounting outer rear support (15) are in a shape of a Chinese character 'ji', front support flanging is arranged on two sides of the battery mounting outer front support (14), rear support flanging is arranged on two sides of the battery mounting outer rear support (15), the battery mounting outer front support (14) and the battery mounting outer rear support (15) are all arranged right above the rear girder (4), large Liang Fanbian is arranged on two sides of the rear girder (4), front support flanging, rear floor body (1) and girder flanging are fixedly connected from top to bottom in sequence, and rear support flanging, rear floor body (1) and girder flanging are fixedly connected from top to bottom in sequence.

10. A rear underbody assembly as claimed in any one of claims 1-4 wherein: the rear end plate assembly comprises a rear end plate outer plate (19) and a rear end plate inner plate (20), wherein the upper end of the rear end plate outer plate (19) is fixedly connected with the upper end of the rear end plate inner plate (20), a rear end plate cavity (21) is formed between the rear end plate outer plate (19) and the rear end plate inner plate (20), the lower end of the rear end plate inner plate (20) is fixedly connected with the rear floor body (1), a rear girder (4) and the rear floor body (1) are formed by surrounding a rear part Liang Qiangti (22), and the rear end plate cavity (21) is connected with the rear part Liang Qiangti (22).