Rear axle section of full-load passenger car frame

Abstract

The utility model provides a rear axle section of a full-load passenger car frame. The full-load passenger car frame rear axle section comprises a first cross beam frame, a second cross beam frame, a longitudinal beam frame, a first wheel cover frame and a second wheel cover frame, the second cross beam frame and the first cross beam frame are arranged in a spaced mode, the first wheel cover frame is arranged beside the first cross beam frame, the second wheel cover frame is arranged beside the second cross beam frame, and the longitudinal beam frame is arranged on the longitudinal beam frame. The longitudinal beam frame is connected with the first cross beam frame, the second cross beam frame, the first wheel cover frame and the second wheel cover frame; air bag mounting frames are connected between the first cross beam frame and the first wheel cover frame and between the second cross beam frame and the second wheel cover frame, a plurality of thrust rod mounting frames are arranged on the first cross beam frame, and a shock absorber mounting frame is arranged on the side, facing the first cross beam frame, of the first wheel cover frame. And two stabilizer bar mounting frames are symmetrically arranged at the bottom of the second wheel cover frame in the Y direction. According to the utility model, stress concentration is avoided, stress distribution is uniform, and reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of bus chassis structure technology, and in particular to a rear axle section of a fully load-bearing bus frame. Background Technology

[0002] Fully monocoque buses offer greater agility, stability, comfort, and safety. Due to their integrated frame structure design, the requirements for their chassis axle sections are relatively high.

[0003] Currently, the axle frame structure for traditional buses, such as the rear axle frame of an electric bus disclosed in patent publication number CN216102380U, features a longitudinal support assembly on each side of the rear axle frame. This longitudinal support assembly includes a first longitudinal beam and a second longitudinal beam overlapping along the height direction, with a reinforcing plate simultaneously fixed between the first and second longitudinal beams. If this structural design were applied to a fully monocoque bus, it would make the installation of the suspension system assembly (including airbag mounting, thrust rod mounting, shock absorber mounting, and stabilizer bar mounting) inconvenient, prone to stress concentration, uneven stress distribution, and low reliability. Utility Model Content

[0004] The purpose of this utility model is to provide a rear axle section of a fully load-bearing bus frame, which solves the problems of inconvenient assembly and stress concentration in the installation of the suspension system in the rear axle section structure of a fully load-bearing bus frame.

[0005] The technical solution of this utility model is as follows: a rear axle section of a fully load-bearing bus frame, including a first crossbeam frame, a second crossbeam frame, a longitudinal beam frame, a first wheel cover frame, and a second wheel cover frame. The second crossbeam frame and the first crossbeam frame are spaced apart in the X direction. The first wheel cover frame is provided on the side of the first crossbeam frame facing the second crossbeam frame, and the second wheel cover frame is provided on the side of the second crossbeam frame facing the first crossbeam frame. Two longitudinal beam frames are spaced apart in the Y direction, and the longitudinal beam frames are connected to the first crossbeam frame, the second crossbeam frame, the first wheel cover frame, and the second wheel cover frame in the X direction. Airbag mounting brackets are connected between the first crossbeam frame and the first wheel cover frame, and between the second crossbeam frame and the second wheel cover frame. Multiple thrust rod mounting brackets are provided on the first crossbeam frame. A shock absorber mounting bracket is provided on the side of the first wheel cover frame facing the first crossbeam frame. Two stabilizer bar mounting brackets are symmetrically provided at the bottom of the second wheel cover frame in the Y direction. The airbag mounting brackets, thrust rod mounting brackets, and shock absorber mounting brackets are symmetrically arranged on the rear axle section of the frame.

[0006] In the above scheme, by adopting a structure including a first crossbeam frame, a second crossbeam frame, a longitudinal beam frame, a first wheel cover frame, and a second wheel cover frame, it is easy to reserve positions on the rear axle section for installing airbag mounting brackets, thrust rod mounting brackets, shock absorber mounting brackets, and stabilizer bar mounting brackets. Furthermore, the airbag mounting brackets, thrust rod mounting brackets, shock absorber mounting brackets, and stabilizer bar mounting brackets can be symmetrically arranged on the rear axle section of the vehicle frame, which enables the force transmitted from the suspension to be transmitted reasonably and effectively, avoiding stress concentration.

[0007] Preferably, the first crossbeam frame includes a first top beam, a first bottom beam, a first column, an intermediate rod, a first side rod, and a second column. The first top beam is located above the first bottom beam in the Z direction, and two first top beams are spaced apart in the Y direction. Both first top beams are connected to the first bottom beam through the first column and the second column. The first column and the second column are connected through the first side rod. The thrust rod mounting brackets are respectively disposed on the first column and the first bottom beam, and the thrust rod mounting brackets are symmetrical in the Y direction. The longitudinal beam frame is connected to the first bottom beam and the first top beam.

[0008] Preferably, a support member is vertically connected between the first top beam and the first column, and a first reinforcing angle is connected between the first top beam and the first column. The first reinforcing angle and the support member are respectively located on opposite sides of the first column.

[0009] Preferably, the first bottom beam includes an upper beam, a lower beam spaced below the upper beam, a plurality of connecting rods connecting the upper beam and the lower beam, and a first diagonal brace connecting the two ends of the upper beam and the lower beam; the first column and the second column are connected to the upper beam.

[0010] Preferably, the second crossbeam frame includes a third diagonal brace, a second bottom beam, a second side beam, a second top beam, a third column, a fourth column, a fifth column, and a second diagonal brace. The second top beam is located above the second bottom beam in the Z direction. Two third columns are spaced apart in the Y direction and connected to the second top beam and the second bottom beam. The two third columns are connected to the opposite sides of each other by a second side beam extending in the Y direction. The fourth column is connected between the second top beam and the second side beam. The fifth column is connected between the second bottom beam and the second side beam. The second diagonal brace is connected between the second top beam and the third column. The third diagonal brace is connected between the second bottom beam and the second side beam. The longitudinal beam frame is connected to the second top beam and the second bottom beam.

[0011] Preferably, the longitudinal beam frame includes a fourth diagonal brace, a first longitudinal beam, a second longitudinal beam, a sixth column, and a fifth diagonal brace; the second longitudinal beam is located above the first longitudinal beam in the Z direction, two sixth columns are spaced apart in the Y direction and connected to the first and second longitudinal beams, the fifth diagonal brace has an outward "V" structure at the upper end of the first longitudinal beam, the fourth diagonal brace has an inward "V" structure at the lower end of the first longitudinal beam, the fifth diagonal brace connects the first longitudinal beam and the first wheel cover frame and connects the first longitudinal beam and the second wheel cover frame, and the fourth diagonal brace connects the first longitudinal beam and the first crossbeam frame and connects the first longitudinal beam and the second crossbeam frame.

[0012] Preferably, both the first wheel cover frame and the second wheel cover frame include a first wheel cover beam, a second wheel cover beam, a mudguard frame, and a seventh column. The second wheel cover beam is located above the first wheel cover beam in the Z direction. The seventh column is connected between the first wheel cover beam and the second wheel cover beam. The mudguard frame is located at both ends of the first wheel cover beam. The longitudinal beam frame is connected to the first wheel cover beam and the second wheel cover beam.

[0013] Preferably, the second wheel cover beam is connected to the second crossbeam frame via a second longitudinal beam, the first wheel cover beam is connected to the second crossbeam frame via a third longitudinal beam, the first crossbeam frame is lower than the first wheel cover beam, and the first crossbeam frame is connected to the first wheel cover beam via a third longitudinal beam.

[0014] Preferably, the airbag mounting frame includes a support frame, reinforcing beams, notches, a mounting plate, and mounting holes. Two support frames are spaced apart, and both ends of the support frames are respectively connected to a first crossbeam frame, a first wheel cover frame, a second crossbeam frame, and a second wheel cover frame. The mounting plate is connected between the bottoms of the two support frames. The upper surface of the mounting plate is provided with two reinforcing beams spaced apart in the X direction. The top of the reinforcing beams is provided with notches, and the mounting holes are provided on the mounting plate.

[0015] Preferably, the thrust rod mounting bracket includes a first support and a second support. The first support is provided with a second welding hole for welding and fixing to the upper end of the first crossbeam frame. The second support is provided with a second welding hole for welding and fixing to the upper end of the first crossbeam frame and a third welding hole for welding and fixing to the lower end of the first crossbeam frame. The second welding hole and the third welding hole are staggered in the Y direction and the Z direction.

[0016] Compared with related technologies, the beneficial effects of this utility model are as follows:

[0017] 1. The rear axle section of the fully load-bearing bus frame adopts a structure including a crossbeam frame, a second crossbeam frame, a longitudinal beam frame, a first wheel cover frame, and a second wheel cover frame. This allows for easy provision of positions on the rear axle section for installing airbag mounting brackets, thrust rod mounting brackets, shock absorber mounting brackets, and stabilizer bar mounting brackets. Furthermore, it enables the airbag mounting brackets, thrust rod mounting brackets, shock absorber mounting brackets, and stabilizer bar mounting brackets to be symmetrically arranged on the rear axle section of the frame. This allows for the reasonable and effective transmission of forces from the suspension, avoiding stress concentration.

[0018] II. The structure is reasonably designed, lightweight, with uniform stress distribution and high reliability;

[0019] 3. The first bottom beam adopts a double-layer structure design with an upper beam and a lower beam. The gap in the middle facilitates the layout of pipelines, and the first diagonal brace connects the first bottom beam and the side frame.

[0020] Fourth, reinforcing angles and triangular ribs are provided at the position of the thrust rod mounting bracket, which is conducive to the force transmission at the thrust rod mounting point and effectively avoids stress concentration;

[0021] 5. The reinforcing beam of the airbag mounting bracket has a notch to allow space for the wiring at the airbag location;

[0022] 6. The second and third weld holes on the second support are staggered to enhance the stability of the thrust rod mounting frame connected to the first bottom beam. Attached Figure Description

[0023] Figure 1 A structural schematic diagram of the rear axle section of a fully load-bearing bus frame provided by this utility model;

[0024] Figure 2 This is a structural schematic diagram of the first crossbeam frame;

[0025] Figure 3 This is a structural schematic diagram of the second crossbeam frame;

[0026] Figure 4 This is a structural schematic diagram of the longitudinal beam frame;

[0027] Figure 5 A schematic diagram of the airbag mounting bracket from the first perspective;

[0028] Figure 6 This is a structural schematic diagram of the airbag mounting bracket from a second perspective. Detailed Implementation

[0029] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0030] like Figure 1 As shown, the rear axle section of a fully load-bearing bus frame provided in this embodiment includes a first crossbeam frame 1, a second crossbeam frame 2, a longitudinal beam frame 3, a first wheel arch frame 4, and a second wheel arch frame 5. The second crossbeam frame 2 and the first crossbeam frame 1 are spaced apart in the X direction. The first wheel arch frame 4 is located on the side of the first crossbeam frame 1 facing the second crossbeam frame 2, and the second wheel arch frame 5 is located on the side of the second crossbeam frame 2 facing the first crossbeam frame 1. Two longitudinal beam frames 3 are spaced apart in the Y direction, and the longitudinal beam frames 3 are connected to the first crossbeam frame 1, the second crossbeam frame 2, the first wheel arch frame 4, and the second wheel arch frame 5 in the X direction. Airbag mounting brackets 6 are connected between the first crossbeam frame 1 and the first wheel arch frame 4, and between the second crossbeam frame 2 and the second wheel arch frame 5. Figure 2 As shown, four airbag mounting brackets 6 are symmetrically arranged vertically and horizontally on the first crossbeam 1. This symmetrical structural arrangement avoids stress concentration, ensures uniform stress distribution, and enhances reliability.

[0031] The first crossbeam frame 1 is provided with multiple thrust rod mounting brackets 7. The first wheel cover frame 4 is provided with a shock absorber mounting bracket 8 on the side facing the first crossbeam frame 1. The bottom of the second wheel cover frame 5 is provided with two stabilizer bar mounting brackets 9 symmetrically in the Y direction. The airbag mounting bracket 6, thrust rod mounting bracket 7, and shock absorber mounting bracket 8 are symmetrically arranged on the rear axle section of the vehicle frame.

[0032] like Figure 2 As shown, the first crossbeam frame 1 includes a first top beam 11, a first bottom beam 12, a first column 14, a middle rod 16, a first side rod 17, and a second column 18. The first top beam 11 is located above the first bottom beam 12 in the Z direction, and two first top beams 11 are spaced apart in the Y direction. Both first top beams 11 are connected to the first bottom beam 12 via the first column 14 and the second column 18. The first column 14 and the second column 18 are connected via the first side rod 17. The thrust rod mounting bracket 7 is located on the inner side of the first column 14 and the first bottom beam 12 (e.g., Figure 1 As shown in the figure, the thrust rod mounting bracket 7 is symmetrical in the Y direction.

[0033] A support member 13 is vertically connected between the first top beam 11 and the first column 14. A first reinforcing angle 15 is connected between the first top beam 11 and the first column 14. The first reinforcing angle 15 and triangular ribs 19 are respectively located on opposite sides of the first column 14. Multiple triangular ribs 19 are vertically provided inside the support member 13.

[0034] The first bottom beam 12 includes an upper beam 121, a lower beam 122 spaced below the upper beam 121, a plurality of connecting rods 124 connecting the upper beam 121 and the lower beam 122, and a first diagonal brace 123 connecting the two ends of the upper beam 121 and the lower beam 122; the first column 14 and the second column 18 are connected to the upper beam 121.

[0035] like Figure 3 As shown, the second crossbeam frame 2 includes a third diagonal brace 21, a second bottom beam 22, a second side beam 23, a second top beam 24, a third column 25, a fourth column 26, a fifth column 27, and a second diagonal brace 28. The second top beam 24 is located above the second bottom beam 22 in the Z direction. Two third columns 25 are spaced apart in the Y direction and connected to the second top beam 24 and the second bottom beam 22. The two third columns 25 are connected to the second side beam 23 extending in the Y direction on the opposite sides. The fourth column 26 is connected between the second top beam 24 and the second side beam 23. The fifth column 27 is connected between the second bottom beam 22 and the second side beam 23. The second diagonal brace 28 is connected between the second top beam 24 and the third column 25. The third diagonal brace 21 is connected between the second bottom beam 22 and the second side beam 23. The longitudinal beam frame 3 is connected to the second top beam 24 and the second bottom beam 22.

[0036] like Figure 4 As shown, the longitudinal beam frame 3 is arranged in two intervals in the Y direction, including a fourth diagonal brace 31, a first longitudinal beam 32, a second longitudinal beam 33, a sixth column 34, and a fifth diagonal brace 35. The first longitudinal beam 32 is a rectangular tube with a thickness of 3mm, a height of 80mm, and a width of 60mm. The second longitudinal beam 33 is located above the first longitudinal beam 32 in the Z direction. Two sixth columns 34 are arranged at intervals in the Y direction and connected to the first longitudinal beam 32 and the second longitudinal beam 33. The fifth diagonal brace 35 is a thin-walled rectangular tube with a thickness of 2mm, a height of 40mm, and a width of 40mm. The fifth diagonal brace 35 has an outward "V" structure at the upper end of the first longitudinal beam 32, and the fourth diagonal brace 31 has an inward "V" structure at the lower end of the first longitudinal beam 32. The fifth diagonal brace 35 connects the first longitudinal beam 32 and the seventh column 44 of the first wheel cover 4, and also connects the first longitudinal beam 32 and the seventh column 44 of the second wheel cover 5. The fourth diagonal brace 31 is connected between the first longitudinal beam 32 and the first bottom beam 12 of the first crossbeam frame 1, and between the first longitudinal beam 32 and the second bottom beam 22 of the second crossbeam frame 2.

[0037] like Figure 1 As shown, a seventh diagonal brace 39 is horizontally connected between the longitudinal beam frame 3 and the first wheel cover frame 4, and between the longitudinal beam frame 3 and the second wheel cover frame 4. The seventh diagonal brace 39 is symmetrically arranged in the Y and X directions. The two longitudinal beam frames 3 form a double-layer support structure, which improves the bending resistance of the rear axle section frame. Furthermore, by adding the seventh diagonal brace 39, the overall structural strength of the longitudinal beam frame is improved, thereby increasing the stiffness of the double-layer support structure.

[0038] like Figure 1 As shown, both the first wheel cover frame 4 and the second wheel cover frame 5 include a first wheel cover beam 41, a second wheel cover beam 42, a mudguard frame 43, and a seventh column 44. The second wheel cover beam 42 is located above the first wheel cover beam 41 in the Z direction. The seventh column 44 is connected between the first wheel cover beam 41 and the second wheel cover beam 42. The mudguard frame 43 is located at both ends of the first wheel cover beam 41. The longitudinal beam frame 3 is connected to the first wheel cover beam 41 and the second wheel cover beam 42.

[0039] The first crossbeam frame 1 is flush with the first wheel cover beam 41 of the first wheel cover frame 4, and the first crossbeam frame 1 and the first wheel cover beam 41 are connected by a third longitudinal beam 38. The first wheel cover frame 4 is higher than the first crossbeam frame 1, which allows more space around the first wheel cover frame 4 and makes the rear axle section structure more compact and space utilization more efficient.

[0040] The second crossbeam 2 is flush with the top of the second wheel cover 5, and the second top beam 24 is connected to the second wheel cover beam 42 by the second longitudinal beam 37. The second bottom beam 22 is connected to the first wheel cover beam 41 by the third longitudinal beam 38. A second reinforcing angle 36 connects the first longitudinal beam 32 and the first wheel cover beam 41.

[0041] like Figure 5 , Figure 6 As shown, the airbag mounting frame 6 includes a support frame 61, reinforcing beams 62, notches 63, a mounting plate 64, mounting holes 65, first welding holes 66, and an arc-shaped opening 67. Two support frames 61 are spaced apart, and both ends of each support frame 61 are connected to a first crossbeam frame 1, a first wheel cover frame 4, a second crossbeam frame 2, and a second wheel cover frame 5, respectively. The mounting plate 64 is connected between the bottoms of the two support frames 61. Two reinforcing beams 62, spaced apart in the X direction, are provided on the upper surface of the mounting plate 64. Notches 63 are provided at the top of each reinforcing beam 62, and mounting holes 65 are provided on the mounting plate 64. The mounting plate 64 has waist-shaped first welding holes 66 at both ends, through which it is welded to the support beams 61. An arc-shaped opening 67 is provided on one side of the mounting plate 64 to reduce weight.

[0042] like Figure 1As shown, there are four airbag mounting brackets 6. The two front support beams 61 are connected at both ends to the first top beam 11 and the first wheel cover beam 41, respectively. The two rear support beams 61 are connected at both ends to the second side rod 23 and the first wheel cover beam 41, respectively. The four airbag mounting brackets 6 are symmetrical in the X direction.

[0043] The thrust rod mounting bracket 7 includes a first support 71 and a second support 72. The first support 71 has a second weld hole 73 for welding and fixing to the first column 14 and the support member 13. The second weld hole 73 is a horizontally extending elongated hole. The second support 72 has a second weld hole 73 for welding and fixing to the upper beam 121 and a third weld hole 74 for welding and fixing to the lower beam 122. The second weld hole 73 and the third weld hole 74 are staggered in the Y and Z directions. The second weld hole 73 is a horizontally extending elongated hole, and the third weld hole 74 is a round hole.

[0044] The shock absorber mounting bracket 8 is connected to the first wheel cover beam 41 of the first wheel cover bracket 4 and is located above the airbag mounting bracket 6.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rear axle section of a full-load passenger car frame, characterized in that: The invention comprises a first crossbeam frame (1), a second crossbeam frame (2), a longitudinal frame (3), a first wheel cover frame (4) and a second wheel cover frame (5), wherein the second crossbeam frame (2) and the first crossbeam frame (1) are arranged at intervals in the X direction, the first crossbeam frame (1) is provided with the first wheel cover frame (4) on the side of the second crossbeam frame (2), the second crossbeam frame (2) is provided with the second wheel cover frame (5) on the side of the first crossbeam frame (1), two longitudinal frames (3) are arranged at intervals in the Y direction, and the longitudinal frames (3) are arranged at the same position as the first crossbeam frame (1), the second crossbeam frame (2) and the first wheel cover frame (4) in the X direction. The first crossbeam frame (1) and the first wheel cover frame (4) are connected to each other, and the second crossbeam frame (2) and the second wheel cover frame (5) are connected to each other with an airbag mounting frame (6); a plurality of thrust rod mounting frames (7) are respectively provided on the first crossbeam frame (1); a shock absorber mounting frame (8) is provided on the side of the first wheel cover frame (4) facing the first crossbeam frame (1); two stabilizer bar mounting frames (9) are symmetrically provided at the bottom of the second wheel cover frame (5) in the Y direction; and the airbag mounting frame (6), the thrust rod mounting frame (7) and the shock absorber mounting frame (8) are symmetrically provided on the rear axle section of the vehicle frame.

2. The rear axle section of the full-load passenger car frame according to claim 1, characterized in that: The first crossbeam frame (1) comprises a first top beam (11), a first bottom beam (12), a first column (14), an intermediate rod (16), a first side rod (17) and a second column (18); the first top beam (11) is located above the first bottom beam (12) in the Z direction, and two first top beams (11) are arranged at intervals in the Y direction; the two first top beams (11) are connected to the first bottom beam (12) via the first column (14) and the second column (18); the column (14) and the second column (18) are connected via the first side rod (17); the thrust rod mounting frame (7) is arranged on the first column (14) and the first bottom beam (12), and the thrust rod mounting frame (7) is symmetrical in the Y direction; the longitudinal beam frame (3) is connected to the first bottom beam (12) and the first top beam (11).

3. The rear axle section of the full-load passenger car frame according to claim 2, characterized in that: A support member (13) is vertically connected between the first top beam (11) and the first column (14), a first reinforcement angle (15) is connected between the first top beam (11) and the first column (14), and the first reinforcement angle (15) and the support member (13) are arranged on opposite sides of the first column (14).

4. The rear axle section of the full-load passenger car frame according to claim 2, characterized in that: The first bottom beam (12) comprises an upper beam (121), a lower beam (122) spaced below the upper beam (121), a plurality of connecting rods (124) connected between the upper beam (121) and the lower beam (122), and a first diagonal brace rod (123) connected to both ends of the upper beam (121) and the lower beam (122); the first column (14) and the second column (18) are connected to the upper beam (121).

5. The rear axle section of the full-load passenger car frame according to claim 1, characterized in that: The second crossbeam frame (2) comprises a third diagonal brace (21), a second bottom beam (22), a second side bar (23), a second top beam (24), a third column (25), a fourth column (26), a fifth column (27) and a second diagonal brace (28); the second top beam (24) is located above the second bottom beam (22) in the Z direction; two third columns (25) are arranged at intervals in the Y direction and are connected to the second top beam (24) and the second bottom beam (22); the two third columns (25) are connected to each other at the sides away from each other. There is a second side bar (23) extending along the Y direction, the fourth column (26) is connected between the second top beam (24) and the second side bar (23), the fifth column (27) is connected between the second bottom beam (22) and the second side bar (23), a second diagonal brace (28) is connected between the second top beam (24) and the third column (25), a third diagonal brace (21) is connected between the second bottom beam (22) and the second side bar (23), and the longitudinal beam frame (3) is connected to the second top beam (24) and the second bottom beam (22).

6. The rear axle section of the full-load passenger car frame according to claim 1, characterized in that: The longitudinal beam frame (3) comprises a fourth diagonal brace (31), a first longitudinal beam (32), a second longitudinal beam (33), a sixth column (34) and a fifth diagonal brace (35); the second longitudinal beam (33) is located above the first longitudinal beam (32) in the Z direction; two sixth columns (34) are arranged at intervals in the Y direction and connected to the first longitudinal beam (32) and the second longitudinal beam (33); the fifth diagonal brace (35) is in an outer "eight" structure at the upper end of the first longitudinal beam (32); the fourth diagonal brace (31) is in an inner "eight" structure at the lower end of the first longitudinal beam (32); the fifth diagonal brace (35) connects the first longitudinal beam (32) and the first wheel cover frame (4) and connects the first longitudinal beam (32) and the second wheel cover frame (5); the fourth diagonal brace (31) connects the first longitudinal beam (32) and the first cross beam frame (1) and connects the first longitudinal beam (32) and the second cross beam frame (2).

7. The rear axle section of the full-load passenger car frame according to claim 1, characterized in that: The first wheel cover frame (4) and the second wheel cover frame (5) both comprise a first wheel cover beam (41), a second wheel cover beam (42), a fender frame (43) and a seventh column (44); the second wheel cover beam (42) is located above the first wheel cover beam (41) in the Z direction; the seventh column (44) is connected between the first wheel cover beam (41) and the second wheel cover beam (42); the fender frame (43) is disposed at both ends of the first wheel cover beam (41); and the longitudinal beam frame (3) is connected to the first wheel cover beam (41) and the second wheel cover beam (42).

8. The rear axle section of the full-load passenger vehicle frame according to claim 7, characterized in that: The second wheel cover beam (42) and the second cross beam frame (2) are connected via a second longitudinal beam, the first wheel cover beam (41) and the second cross beam frame (2) are connected via a third longitudinal beam (38), the first cross beam frame (1) is lower than the first wheel cover beam, and the first cross beam frame (1) and the first wheel cover beam are connected via the third longitudinal beam (38).

9. The rear axle section of a full-load passenger car frame according to claim 1, characterized in that: The airbag mounting frame (6) comprises a support frame (61), a reinforcing beam (62), a notch (63), a mounting plate (64) and a mounting hole (65), wherein two support frames (61) are arranged at intervals, and the two ends of the support frame (61) are respectively connected to the first crossbeam frame (1) and the first wheel cover frame (4) and the second crossbeam frame (2) and the second wheel cover frame (5), the mounting plate (64) is connected between the bottoms of the two support frames (61), and the upper surface of the mounting plate (64) is provided with two reinforcing beams (62) arranged at intervals in the X direction, the top of the reinforcing beam (62) is provided with a notch (63), and the mounting hole (65) is provided on the mounting plate (64).

10. The rear axle section of a full-load passenger vehicle frame according to claim 1, characterized in that: The thrust rod mounting frame (7) comprises a first support (71) and a second support (72); the first support (71) is provided with a second welding hole (73) for welding and fixing with the upper end of the first cross beam frame (1); the second support (72) is provided with a second welding hole (73) for welding and fixing with the upper end of the first cross beam frame (1) and a third welding hole (74) for welding and fixing with the lower end of the first cross beam frame (1); the second welding hole (73) and the third welding hole (74) are staggered in the Y direction and the Z direction.

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