Front suspension section of full-load passenger car frame

Abstract

The utility model provides a front suspension section of a full-load passenger car frame. The full-load passenger car frame front suspension section comprises a vertically-arranged first frame body, a second frame body connected to one side of the lower end of the first frame body and a third frame body connected to one side of the upper end of the first frame body, the second frame body and the third frame body are located on the same side, and a trailer mounting frame is arranged on the side, away from the second frame body, of the first frame body. A steering system mounting frame is arranged on one side of the second frame body, a first inclined supporting rod is connected between the first frame body and the second frame body, and a connecting rod is vertically connected between the second frame body and the third frame body. Force transmission and dispersion are carried out on the trailer and a steering system through the frame bodies, and the rigidity and strength requirements of the front suspension section of the frame are met; an auxiliary frame is omitted, and the self weight of the front suspension section is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bus chassis structures, in particular to a front suspension section of a full-load bus frame. Background Art

[0002] The full-load bus makes the driving of the bus more agile, stable, comfortable and safe. Because it adopts an integrated frame structure design, the requirements for its chassis bridge section structure are relatively high.

[0003] At present, for the bridge section frame structure of traditional buses, such as a passenger bus lightweight front suspension skeleton structure disclosed in the existing patent announcement number CN214001815U, it includes a frame, and the front end of the frame is provided with a luggage compartment front suspension and a central keel front suspension skeleton, and the central keel front suspension skeleton is connected to the front suspension. The front suspension includes a suspension body, a longitudinal thrust rod, a transverse thrust rod and a transverse stabilizer bar, and the transverse thrust rod seat is a ball head fixed end; the central keel front suspension skeleton is a single-layer skeleton; the upper longitudinal thrust rod seat and the lower longitudinal thrust rod seat are connected to the central keel front suspension skeleton through the upper longitudinal thrust rod connection structure and the lower longitudinal thrust rod connection structure respectively; the transverse thrust rod seat is connected to the central keel front suspension skeleton through the transverse thrust rod connection structure; the transverse stabilizer bar is connected to the central keel front suspension skeleton through the transverse stabilizer bar connection structure. Because it is designed with a subframe, its own weight is heavy, and it is not suitable for the chassis of a full-load bus. In addition, if this front suspension frame is used in a full-load passenger car, the trailer structure and steering system mounting structure installed thereon will be prone to stress concentration, uneven force, and low reliability. Utility Model Content

[0004] The utility model aims to provide a front suspension section of a full-load passenger car frame, reduce deadweight, and solve the problems of inconvenient assembly and stress concentration of trailer and steering system installation in the front suspension section structure of the full-load passenger car frame.

[0005] The technical solution of the utility model is: a front suspension section of a full-load passenger car frame, comprising a first frame body arranged vertically, a second frame body connected to one side of the lower end of the first frame body, and a third frame body connected to one side of the upper end of the first frame body, wherein the second frame body and the third frame body are located on the same side, a trailer mounting frame is provided on the side of the first frame body away from the second frame body, a steering system mounting frame is provided on one side of the second frame body, a first diagonal brace is connected between the first frame body and the second frame body, and a connecting rod is vertically connected between the second frame body and the third frame body.

[0006] In the above scheme, by adopting a structure including a first frame, a second frame and a third frame, the second frame and the third frame are respectively arranged at the upper and lower ends of the first frame, the steering system and the trailer are installed on the lower second frame, and the connection is strengthened by the first diagonal support rod. The force of the trailer and the steering system is efficiently transmitted and dispersed through each frame, thereby meeting the stiffness and strength requirements of the front suspension section of the frame; and the subframe is eliminated to reduce the weight of the front suspension section itself.

[0007] Preferably, the first frame includes a first cross beam, a second cross beam, and a column, the second cross beam is located above the first cross beam, a plurality of columns are connected between the first cross beam and the second cross beam, the second frame is connected to the first cross beam, the third frame is connected to the second cross beam, and the trailer mounting frame is arranged on one of the columns.

[0008] Preferably, the second frame includes a first longitudinal beam, a second longitudinal beam, a third cross beam, an anti-collision beam, a second diagonal support rod and a fourth cross beam, two first longitudinal beams are arranged on the first frame at intervals, and two second diagonal support rods are arranged in a V shape, the small ends of the two second diagonal support rods in the V shape are connected to the first frame, and the large ends are connected to the fourth cross beam, and both ends of the fourth cross beam are connected to the first longitudinal beam; one end of the second longitudinal beam is connected to the first frame, and the second longitudinal beam is located beside the first longitudinal beam, and a steering system mounting frame is arranged on a side of the second longitudinal beam close to the first longitudinal beam, and the third cross beam is connected between the second longitudinal beam and the first longitudinal beam; the anti-collision beam is detachably connected to the bottom of one of the first longitudinal beams and the second diagonal support rods.

[0009] Preferably, the anti-collision beam includes a beam body and a connecting plate, the beam body is U-shaped, and the connecting plates are arranged at both ends of the U-shaped beam body, wherein the connecting plate at one end is connected to the first longitudinal beam, and the connecting plate at the other end is connected to the second diagonal brace.

[0010] Preferably, the third frame includes a parting beam, a fifth cross beam, a third longitudinal beam, a fourth longitudinal beam and a fifth longitudinal beam, one end of the fourth longitudinal beam, the third longitudinal beam and the parting beam are all connected to the first frame, the fifth cross beam is connected between the fourth longitudinal beam, the third longitudinal beam and the parting beam, the fifth longitudinal beam is connected to an end of the fifth cross beam away from the first frame, and the fifth longitudinal beam is parallel to the third longitudinal beam, and the end of the parting beam away from the first frame is inclined toward the fifth longitudinal beam.

[0011] Preferably, the trailer mounting frame includes a first trailer frame connected to a side surface of the first frame body and a second trailer frame connected to a bottom of the first frame body.

[0012] Preferably, the first trailer frame includes a first support, a pin shaft and a cotter pin, the first support is provided with at least one first mounting hole, the pin shaft is assembled in one of the first mounting holes, and the cotter pin is installed at the end of the pin shaft.

[0013] Preferably, the first support includes a base plate, a first mounting plate, a baffle, a first reinforcing rib and a second reinforcing rib, the base plate is vertically arranged on the first frame, two first mounting plates are arranged on the base plate at intervals, the first reinforcing rib is connected between the upper first mounting plate and the base plate, the second reinforcing rib is connected between the lower first mounting plate and the base plate, the baffle is connected between the two first mounting plates, the baffle is arranged on both sides of the counterclockwise or clockwise rotation direction of the pin shaft, and two first mounting holes are provided in the extension direction of the first mounting plate.

[0014] Preferably, the second trailer frame includes a sixth cross beam, a first reinforcing plate and a circular hole, the sixth cross beam is connected to the bottom of the first frame, the first reinforcing plate is connected to the bottom of the sixth cross beam, and a plurality of the circular holes are arranged on the first reinforcing plate.

[0015] Preferably, the steering system mounting frame includes a second support and a third support connected to the second frame body, and the third support is arranged close to the first frame body.

[0016] Compared with the related art, the beneficial effects of the utility model are:

[0017] 1. The front suspension section of the full-load passenger car frame adopts a structure including a first frame, a second frame and a third frame. The second frame and the third frame are respectively arranged at the upper and lower ends of the first frame. The steering system and the trailer are installed on the lower second frame, and the connection is strengthened by the first diagonal brace. The force of the trailer and the steering system is efficiently transmitted and dispersed through each frame, so as to meet the rigidity and strength requirements of the front suspension section of the frame; and the subframe is eliminated to reduce the weight of the front suspension section itself;

[0018] Second, an anti-collision beam is detachably connected to the bottom of the second frame, and the anti-collision beam has a ground clearance lower than the minimum ground clearance of the steering system, which provides better protection for the steering system;

[0019] 3. The second frame body is designed to be a V-shaped second diagonal brace, and the second diagonal brace is respectively connected to the first crossbeam and the fourth crossbeam to form a closed structure, and the first diagonal brace is connected to the reinforcing rod, which can effectively transmit and disperse the trailer force when the first trailer frame is used;

[0020] Fourth, the first support is provided with baffles on both sides of the rotation direction of the pin shaft, and the baffles can limit the swing angle during the towing process and improve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a front suspension section of a full-load passenger car frame provided by the utility model from a first viewing angle;

[0022] Figure 2 A schematic structural diagram of a second perspective of the front overhang section of a full-load passenger vehicle frame provided by the utility model;

[0023] Figure 3 is a schematic diagram of the structure of the second frame;

[0024] Figure 4 is a schematic diagram of the structure of the third frame;

[0025] Figure 5 It is a schematic structural diagram of the first trailer frame.

[0026] In the accompanying drawings: 1, first frame; 11, first crossbeam; 12, second crossbeam; 13, column; 2, second frame; 21, first longitudinal beam; 22, second longitudinal beam; 23, third crossbeam; 24, anti-collision beam; 241, beam body; 242, connecting plate; 25, second diagonal brace; 26, fourth crossbeam; 27, reinforcing rod; 3, third frame; 4, trailer mounting frame; 41, first trailer frame; 411, first support; 4111, bottom plate; 4112, first mounting plate; 4113, baffle; 4114, first reinforcing rib; 4115, second reinforcing rib; 4116, first mounting plate; 4117, baffle; 4118, first reinforcing rib; 4119, second reinforcing rib; 4120, first mounting plate; 4121, baffle; 4122, first reinforcing rib; 4123, baffle; 4124, first reinforcing rib; 4125, second reinforcing rib; 4126, first mounting plate; 4127, baffle; 4128, first reinforcing rib; 4129, second reinforcing rib; 4130, first reinforcing rib; 4131, second reinforcing rib; 4132, first mounting plate; 4133, baffle; 4134, first reinforcing rib; 4135, second reinforcing rib; 4136, first reinforcing rib; 4137, second reinforcing rib; 4138, first reinforcing rib; 4139, first reinforcing rib; 4140, first reinforcing rib; 4141, first reinforcing rib; 116. First mounting hole; 4117. First welding hole; 412. Pin; 413. Cotter pin; 42. Second trailer frame; 421. Sixth cross beam; 422. First reinforcing plate; 423. Round hole; 5. Steering system mounting frame; 51. Second support; 511. Second mounting plate; 512. Third reinforcing rib; 513. Second mounting hole; 514. Output shaft hole; 515. Second welding hole; 516. Leakage hole; 52. Third support; 521. Third mounting plate; 522. Second reinforcing plate; 524. Weight reduction hole; 6. First diagonal support rod; 7. Connecting rod. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0028] like Figure 1 , Figure 2As shown, the front suspension section of a full-load passenger car frame provided in this embodiment includes a first frame body 1 arranged vertically, a second frame body 2 connected to one side of the lower end of the first frame body 1, and a third frame body 3 connected to one side of the upper end of the first frame body 1. The third frame body 3 constitutes a driving area plane. The second frame body 2 and the third frame body 3 are located on the same side, a trailer mounting frame 4 is provided on the side of the first frame body 1 away from the second frame body 2, a steering system mounting frame 5 is provided on one side of the second frame body 2, a first diagonal brace 6 is connected between the first frame body 1 and the second frame body 2, and a connecting rod 7 is vertically connected between the second frame body 2 and the third frame body 3.

[0029] like Figure 2 As shown, the first frame 1 includes a first crossbeam 11, a second crossbeam 12, and a column 13. The second crossbeam 12 is located above the first crossbeam 11, and a plurality of columns 13 are connected between the first crossbeam 11 and the second crossbeam 12.

[0030] like Figure 3 As shown, the second frame 2 includes a first longitudinal beam 21, a second longitudinal beam 22, a third cross beam 23, an anti-collision beam 24, a second diagonal brace 25, a fourth cross beam 26 and a reinforcing rod 27. Two first longitudinal beams 21 are arranged on the first cross beam 11 at intervals. Two second diagonal braces 25 are arranged in a V shape, and the small ends of the two second diagonal braces 25 in the V shape are connected to the first frame 1, and the large ends are connected to the fourth cross beam 26. Both ends of the fourth cross beam 26 are connected to the first longitudinal beam 21. The reinforcing rod 27 is connected between the two second diagonal braces 25. One end of the second longitudinal beam 22 is connected to the first frame 1, and the second longitudinal beam 22 is located beside the first longitudinal beam 21, and a steering system mounting frame 5 is arranged on the side of the second longitudinal beam 22 close to the first longitudinal beam 21. One end of the first diagonal brace 6 is connected to the middle column 13 of the first frame 1, and the other end of the first diagonal brace 6 is connected to the reinforcing rod 27 close to the first cross beam 11.

[0031] The steering system mounting frame 5 includes a second support 51 and a third support 52. The second support 51 is connected between the second longitudinal beam 22 and the first longitudinal beam 21, and the second support 51 is arranged away from the first cross beam 11. The third cross beam 23 is connected between the second longitudinal beam 22 and the first longitudinal beam 21, and the third cross beam 23 is located on the side of the second support 51 close to the first cross beam 11.

[0032] The second support 51 is a steering gear mounting support, which includes a second mounting plate 511, a third reinforcing rib 512, a second mounting hole 513, an output shaft hole 514, a second welding hole 515 and a leakage hole 516. The second mounting plate 511 is a U-shaped structure, including a lower plate and folded edges perpendicular to the two ends of the lower plate, one folded edge is connected to the second longitudinal beam 22, and the other folded edge is connected to the first longitudinal beam 21, and a plurality of second welding holes 515 are provided on the two folded edges, and the second mounting plate 511 is fixed by plug welding through the second welding holes 515. The second mounting plate 511 is provided with a second mounting hole 513, an output shaft hole 514 and a leakage hole 516. The second mounting hole 513 is used for bolt mounting and fixing of the steering gear. The output shaft hole 514 is used to avoid the movement space of the output shaft of the steering gear. The leakage hole 516 is conducive to the outflow of electrophoretic liquid and the discharge of water accumulated in the vehicle. The third reinforcing rib 512 is connected to the lower plate and the folded edge at a side away from the third cross beam 23 .

[0033] The third support 52 is an angle steering support, which is connected to the side surface of the first cross beam 11 and is arranged near the second longitudinal beam 22. The third support 52 includes a third mounting plate 521, a second reinforcing plate 522, a third mounting hole 523 and a weight reduction hole 524. One end of the third mounting plate 521 is connected to the first cross beam 11. Second reinforcing plates 522 are arranged on both sides of the third mounting plate 521. The third mounting hole 523 and the weight reduction hole 524 are both arranged on the third mounting plate 521. The third mounting hole 523 is used for bolt installation and fixing of the angle steering, and the weight reduction hole 524 is circular, which plays a role in strengthening the third support 52.

[0034] like Figure 2 , Figure 3 As shown, the anti-collision beam 24 is detachably connected to the bottom of one of the first longitudinal beams 21 and the second diagonal brace 25. The anti-collision beam 24 includes a beam body 241 and a connecting plate 242. The beam body 241 is U-shaped, and the connecting plates 242 are arranged at both ends of the U-shaped beam body 241. The connecting plate 242 at one end is connected to the first longitudinal beam 21 by bolts, and the connecting plate 242 at the other end is connected to the second diagonal brace 25. The anti-collision beam 24 is lower than the minimum ground clearance of the steering system, which can provide better protection for the steering system.

[0035] like Figure 2 , Figure 4As shown, the third frame 3 includes a parting beam 31, a fifth cross beam 32, a third longitudinal beam 33, a fourth longitudinal beam 34 and a fifth longitudinal beam 35. One end of the fourth longitudinal beam 34, the third longitudinal beam 33 and the parting beam 31 are all connected to the second cross beam 12, the fifth cross beam 32 is connected between the fourth longitudinal beam 34, the third longitudinal beam 33 and the parting beam 31, the fifth longitudinal beam 35 is connected to the end of the fifth cross beam 32 away from the first frame 1, and the fifth longitudinal beam 35 is parallel to the third longitudinal beam 33, and the end of the parting beam 31 away from the first frame 1 is inclined toward the fifth longitudinal beam 35. The structural state of the parting beam 31 is determined by the driver's zone parting line. Figure 4 As shown, a third longitudinal beam 33 is added inside the fourth longitudinal beam 34, and the rectangular area formed by the two third longitudinal beams 33, the second cross beam 12 and the fifth cross beam 32 is the driver pedal overlap area for fixing the driver pedal.

[0036] like Figure 1 As shown, the connecting rod 7 is vertically connected between the first longitudinal beam 21 and the fifth cross beam 32 , between the parting beam 31 and the second diagonal brace 25 , and between the parting beam 31 and the reinforcing rod 27 away from the first cross beam 11 .

[0037] like Figure 2 , Figure 5 As shown, the trailer mounting frame 4 includes a first trailer frame 41 connected to the outer side of the middle column 13 and a second trailer frame 42 connected to the bottom of the first crossbeam 11. The first trailer frame 41 is used for a pin-type trailer, and the second trailer frame 42 is used for a lifting trailer, either of which can be selected.

[0038] The first trailer frame 41 includes a first support 411, a pin shaft 412 and a cotter pin 413. The first support 411 is provided with at least one first mounting hole 4116. The pin shaft 412 is assembled in one of the first mounting holes 4116, and the cotter pin 413 is installed at the end of the pin shaft 412.

[0039] The first support 411 includes a bottom plate 4111, a first mounting plate 4112, a baffle 4113, a first reinforcing rib 4114 and a second reinforcing rib 4115. The bottom plate 4111 is vertically arranged on the first frame 1. Two first mounting plates 4112 are arranged on the bottom plate 4111 at intervals. The first reinforcing rib 4114 is connected between the upper first mounting plate 4112 and the bottom plate 4111. The second reinforcing rib 4115 is connected between the lower first mounting plate 4112 and the bottom plate 4111. The baffle 4113 is connected between the two first mounting plates 4112. The baffle 4113 is arranged on both sides of the counterclockwise or clockwise rotation direction of the pin shaft 412. Two first mounting holes 4116 are arranged in the extension direction of the first mounting plate 4112, so that the two first mounting holes 4116 are arranged front and back. During the towing process, the rotating pin shaft 412 can be installed with one of the first mounting holes 4116 according to the convenience of operation. In addition, by selecting the first mounting holes 4116 arranged front and back, the size of the upper and lower angle limit during the towing process can be adjusted. The baffle 4113 forms a left and right arrangement structure, which can limit the left and right swing angle of the trailer. The bottom plate 4111 is provided with a first welding hole 4117, which is fixed to the column 13 by plug welding through the first welding hole 4117. When the first trailer frame 41 fixed to the column 13 is used for towing operations, the first diagonal brace rod 6 and the reinforcing rod 27 can effectively transmit and disperse the towing force.

[0040] like Figure 2 As shown, the second trailer frame 42 includes a sixth cross beam 421, a first reinforcing plate 422 and a circular hole 423. The sixth cross beam 421 is connected to the bottom of the first frame body 1, the first reinforcing plate 422 is connected to the bottom of the sixth cross beam 421, and a plurality of circular holes 423 are arranged on the first reinforcing plate 422. The circular holes 423 function as plug welding holes or weight-reducing holes, which can strengthen the connection between the sixth cross beam 421 and the first reinforcing plate 422 and reduce weight at the same time. The first reinforcing plate 422 is fixed to the sixth cross beam 421 by intermittent welding, so that the first reinforcing plate 422 can be easily replaced when it is damaged.

[0041] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A front suspension section of a full-load passenger car frame, characterized in that: The invention comprises a first frame (1) arranged vertically, a second frame (2) connected to one side of the lower end of the first frame (1), and a third frame (3) connected to one side of the upper end of the first frame (1), wherein the second frame (2) and the third frame (3) are located on the same side, a trailer mounting frame (4) is provided on the side of the first frame (1) away from the second frame (2), a steering system mounting frame (5) is provided on one side of the second frame (2), a first diagonal support rod (6) is connected between the first frame (1) and the second frame (2), and a connecting rod (7) is vertically connected between the second frame (2) and the third frame (3).

2. The front suspension section of the full-load passenger car frame according to claim 1, characterized in that: The first frame (1) comprises a first crossbeam (11), a second crossbeam (12), and a column (13); the second crossbeam (12) is located above the first crossbeam (11); a plurality of columns (13) are connected between the first crossbeam (11) and the second crossbeam (12); the second frame (2) is connected to the first crossbeam (11); the third frame (3) is connected to the second crossbeam (12); and the trailer mounting frame (4) is arranged on one of the columns (13).

3. The front suspension section of the full-load passenger car frame according to claim 1, characterized in that: The second frame (2) comprises a first longitudinal beam (21), a second longitudinal beam (22), a third cross beam (23), an anti-collision beam (24), a second diagonal brace (25) and a fourth cross beam (26), wherein two first longitudinal beams (21) are arranged on the first frame (1) at intervals, and two second diagonal braces (25) are arranged in a V shape, wherein the small ends of the two second diagonal braces (25) in the V shape are connected to the first frame (1), and the large ends are connected to the fourth cross beam (26), and both ends of the fourth cross beam (26) are connected to the first frame (1). connected to the first longitudinal beam (21); one end of the second longitudinal beam (22) is connected to the first frame body (1), and the second longitudinal beam (22) is located beside the first longitudinal beam (21), and a steering system mounting frame (5) is provided on a side of the second longitudinal beam (22) close to the first longitudinal beam (21), and the third cross beam (23) is connected between the second longitudinal beam (22) and the first longitudinal beam (21); the anti-collision beam (24) is detachably connected to one of the first longitudinal beams (21) and the bottom of the second diagonal support rod (25).

4. The front suspension section of the full-load passenger car frame according to claim 3 is characterized in that: The anti-collision beam (24) comprises a beam body (241) and a connecting plate (242); the beam body (241) is U-shaped; the connecting plates (242) are arranged at both ends of the U-shaped beam body (241); the connecting plate (242) at one end is connected to the first longitudinal beam (21), and the connecting plate (242) at the other end is connected to the second diagonal brace rod (25).

5. The front suspension section of the full-load passenger car frame according to claim 1, characterized in that: The third frame (3) comprises a parting beam (31), a fifth cross beam (32), a third longitudinal beam (33), a fourth longitudinal beam (34) and a fifth longitudinal beam (35); one end of the fourth longitudinal beam (34), the third longitudinal beam (33) and the parting beam (31) are all connected to the first frame (1); the fifth cross beam (32) is connected between the fourth longitudinal beam (34), the third longitudinal beam (33) and the parting beam (31); the fifth longitudinal beam (35) is connected to one end of the fifth cross beam (32) away from the first frame (1); the fifth longitudinal beam (35) is parallel to the third longitudinal beam (33); and the end of the parting beam (31) away from the first frame (1) is inclined toward the fifth longitudinal beam (35).

6. The front suspension section of the full-load passenger car frame according to claim 1, characterized in that: The trailer mounting frame (4) comprises a first trailer frame (41) connected to the side of the first frame body (1) and a second trailer frame (42) connected to the bottom of the first frame body (1).

7. The front suspension section of the full-load passenger car frame according to claim 6, characterized in that: The first trailer frame (41) comprises a first support (411), a pin shaft (412) and a cotter pin (413); the first support (411) is provided with at least one first mounting hole (4116); the pin shaft (412) is assembled in one of the first mounting holes (4116); and the cotter pin (413) is mounted at the end of the pin shaft (412).

8. The front suspension section of the full-load passenger car frame according to claim 7, characterized in that: The first support (411) comprises a bottom plate (4111), a first mounting plate (4112), a baffle (4113), a first reinforcing rib (4114) and a second reinforcing rib (4115); the bottom plate (4111) is vertically arranged on the first frame (1); two first mounting plates (4112) are arranged on the bottom plate (4111) at intervals; the first reinforcing rib (4114) is connected between the upper first mounting plate (4112) and the bottom plate (4111); the second reinforcing rib (4115) is connected between the lower first mounting plate (4112) and the bottom plate (4111); the baffle (4113) is connected between the two first mounting plates (4112); the baffle (4113) is arranged on both sides of the counterclockwise or clockwise rotation direction of the pin shaft (412); and two first mounting holes (4116) are arranged in the extension direction of the first mounting plate (4112).

9. The front suspension section of the full-load passenger car frame according to claim 6, characterized in that: The second trailer frame (42) comprises a sixth cross beam (421), a first reinforcing plate (422) and a circular hole (423); the sixth cross beam (421) is connected to the bottom of the first frame body (1); the first reinforcing plate (422) is connected to the bottom of the sixth cross beam (421); and a plurality of the circular holes (423) are provided on the first reinforcing plate (422).

10. The front suspension section of the full-load passenger car frame according to claim 1, characterized in that: The steering system mounting frame (5) comprises a second support (51) and a third support (52) connected to the second frame body (2); the third support (52) is arranged close to the first frame body (1).

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