Rear suspension structure of unmanned mine truck

Abstract

The invention discloses an unmanned mine truck rear suspension structure which comprises a frame (1), a middle axle cross beam assembly (2) and a rear axle cross beam assembly (3), and the middle axle cross beam assembly (2) is connected with a left side longitudinal beam and a right side longitudinal beam of the frame (1) through two middle axle shock absorbers (4). The rear axle cross beam assembly (3) is connected with a left side longitudinal beam and a right side longitudinal beam of the frame (1) through two rear axle shock absorbers (5), the middle axle cross beam assembly (2) is connected with a lower cross beam (7) at the bottom of the frame (1) through a middle axle connecting arm (6), and the rear axle cross beam assembly (3) is connected with a stable base cross beam (9) at the bottom of the frame (1) through a rear axle connecting arm (8). The device has the advantages of being higher in bearing capacity and convenient to replace and maintain.

Description

Technical Field

[0001] The invention relates to a rear suspension structure, in particular to a rear suspension structure of an unmanned mining truck. Background Art

[0002] At present, there are two main types of rear suspension systems commonly used in mining trucks: leaf spring rear suspension and air rear suspension. Leaf spring rear suspension uses springs made of multiple layers of steel plates to buffer vibrations. When the rear axle is impacted by the road during vehicle driving, the leaf spring undergoes elastic deformation to buffer vibrations and ensure the vehicle's driving stability. Air rear suspension uses compressed air as an elastic medium. Its outstanding feature is that it can automatically adjust the height of the vehicle body according to the actual load of the vehicle, ensuring that the vehicle can maintain good driving performance under different load conditions. Both leaf spring rear suspension and air rear suspension have better support and shock absorption effects, ensuring the driver's driving comfort while meeting the load capacity.

[0003] However, with the development and progress of science and technology, new energy commercial electric unmanned mining trucks have gradually occupied a dominant position. Since unmanned mining trucks do not require drivers, the demand for shock absorption performance has been greatly reduced, and the demand for load-bearing capacity has been greatly increased. Therefore, the traditional leaf spring rear suspension and air rear suspension can no longer meet current needs. It is urgent to develop a rear suspension structure with stronger load-bearing capacity that is suitable for unmanned mining trucks. Summary of the invention

[0004] The purpose of the present invention is to provide an unmanned mining truck rear suspension structure to solve the technical problems in the prior art. The structure has a stronger load-bearing capacity and is convenient for replacement and maintenance.

[0005] The present invention provides a rear suspension structure of an unmanned mining truck, comprising a vehicle frame, a middle bridge crossbeam assembly and a rear bridge crossbeam assembly, wherein the middle bridge crossbeam assembly is respectively connected to a left longitudinal beam and a right longitudinal beam of the vehicle frame through two middle bridge shock absorbers, the rear bridge crossbeam assembly is connected to a left longitudinal beam and a right longitudinal beam of the vehicle frame through two rear bridge shock absorbers, the middle bridge crossbeam assembly is connected to a lower crossbeam at the bottom of the vehicle frame through a middle bridge connecting arm, and the rear bridge crossbeam assembly is connected to a stable base crossbeam at the bottom of the frame through a rear bridge connecting arm.

[0006] In the aforementioned unmanned mining truck rear suspension structure, preferably, the bottom of the left longitudinal beam and the right longitudinal beam of the frame are both provided with a first mounting groove and a second mounting groove, two first mounting plates are welded and fixed in the first mounting groove, two second mounting plates are welded and fixed in the second mounting groove, first pins are installed on the two first mounting plates, and second pins are installed on the two second mounting plates, the upper end of the mid-axle shock absorber is rotatably connected to the first pin, and the upper end of the rear axle shock absorber is rotatably connected to the second pin.

[0007] In the aforementioned unmanned mining truck rear suspension structure, preferably, two middle axle shock absorber lower mounting brackets are welded and fixed on the rear side surface of the middle axle crossbeam assembly, a second pin is installed on the middle axle shock absorber lower mounting bracket, and the lower end of the middle axle shock absorber is rotatably connected to the second pin; two rear axle shock absorber lower mounting brackets are welded and fixed on the rear side surface of the rear axle crossbeam assembly, a third pin is installed on the rear axle shock absorber lower mounting bracket, and the lower end of the rear axle shock absorber is rotatably connected to the third pin.

[0008] In the aforementioned unmanned mining truck rear suspension structure, preferably, the middle bridge connecting arm includes a first connecting plate, a first connecting arm and a second connecting arm, one end of the first connecting arm and the second connecting arm are welded and fixed to the first connecting plate, the other end of the first connecting arm is welded and fixed with a first rectangular mounting plate, the first rectangular mounting plate is fixedly connected to the right side of the front side wall of the middle bridge crossbeam assembly by bolts, the other end of the second connecting arm is welded and fixed with a second rectangular mounting plate, the second rectangular mounting plate is fixedly connected to the left side of the front side wall of the middle bridge crossbeam assembly by bolts, a middle bridge connecting arm mounting bracket is welded to the rear side wall of the lower crossbeam, a fourth pin is installed on the middle bridge connecting arm mounting bracket, and the first connecting plate is rotatably connected to the fourth pin.

[0009] In the aforementioned unmanned mining truck rear suspension structure, preferably, the rear axle connecting arm includes a second connecting plate, a third connecting arm and a fourth connecting arm, one end of the third connecting arm and the fourth connecting arm are welded and fixed to the second connecting plate, the other end of the third connecting arm is welded and fixed with a third rectangular mounting plate, the third rectangular mounting plate is fixedly connected to the left side of the front side wall of the rear axle cross beam assembly by bolts, the other end of the fourth connecting arm is welded and fixed with a fourth rectangular mounting plate, the fourth rectangular mounting plate is fixedly connected to the right side of the front side wall of the rear axle cross beam assembly by bolts, a rear axle connecting arm mounting bracket is welded to the bottom of the stabilizing base cross beam, a fifth pin is installed on the rear axle connecting arm mounting bracket, and the second connecting plate is rotatably connected to the fifth pin.

[0010] In the aforementioned unmanned mining truck rear suspension structure, preferably, a first lateral thrust rod upper bracket is welded and fixed on the bottom surface of the right longitudinal beam of the frame, and the upper end of the first lateral thrust rod is rotatably connected to the first lateral thrust rod upper bracket through a sixth pin shaft, and a first lateral thrust rod lower bracket is welded and fixed on the right side of the top surface of the middle bridge crossbeam assembly, and the lower end of the first lateral thrust rod is rotatably connected to the first lateral thrust rod lower bracket through a seventh pin shaft.

[0011] In the aforementioned unmanned mining truck rear suspension structure, preferably, a second transverse thrust rod upper bracket is welded and fixed to the bottom surface of the right longitudinal beam of the frame, a second transverse thrust rod lower bracket is welded to the left side of the top surface of the rear axle crossbeam assembly, the upper end of the second transverse thrust rod is rotatably connected to the second transverse thrust rod upper bracket through an eighth pin shaft, and the lower end of the second transverse thrust rod is rotatably connected to the second transverse thrust rod lower bracket through a ninth pin shaft.

[0012] Compared with the prior art, the center bridge crossbeam assembly of the present invention is connected to the left longitudinal beam and the right longitudinal beam of the frame through two center bridge shock absorbers, and the rear bridge crossbeam assembly is connected to the left longitudinal beam and the right longitudinal beam of the frame through two rear bridge shock absorbers. The present invention replaces the leaf spring structure and the air suspension structure in the prior art with two center bridge shock absorbers and two rear bridge shock absorbers, which greatly simplifies the rear suspension device. The shock absorber has a greater load-bearing capacity and can bear more than 100 tons of force. Although the shock absorption performance of the shock absorber is weaker than that of the leaf spring rear suspension and the air rear suspension, it greatly improves the load-bearing capacity of the unmanned mining truck. Since the unmanned mining truck does not need a driver, the unmanned mining truck has a lower requirement for shock absorption performance. The present invention improves the load-bearing capacity by reducing the comfort of the unmanned mining truck, making the unmanned mining truck more efficient.

[0013] The middle bridge crossbeam assembly of the present invention is connected to the lower crossbeam at the bottom of the frame through the middle bridge connecting arm, and the rear bridge crossbeam assembly is connected to the stable base crossbeam at the bottom of the frame through the rear bridge connecting arm. The arrangement of the middle bridge connecting arm and the rear bridge connecting arm ensures the vehicle's stable driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is an axonometric view of the present invention;

[0015] Figure 2 It is a schematic diagram of the structure of the present invention after removing the middle bridge crossbeam assembly and the rear bridge crossbeam assembly;

[0016] Figure 3 It is a partial structural schematic diagram of the present invention;

[0017] Figure 4 It is a structural schematic diagram of the middle bridge crossbeam assembly and the rear bridge crossbeam assembly;

[0018] Figure 5 It is another partial structural schematic diagram of the present invention.

[0019] Description of the accompanying drawings: frame 1, middle bridge crossbeam assembly 2, rear axle crossbeam assembly 3, middle bridge shock absorber 4, rear axle shock absorber 5, middle bridge connecting arm 6, lower crossbeam 7, rear axle connecting arm 8, stable base crossbeam 9, first mounting groove 10, second mounting groove 11, first mounting plate 12, second mounting plate 13, middle bridge shock absorber lower mounting bracket 14, rear axle shock absorber lower mounting bracket 15, first connecting plate 16, first connecting arm 17, second connecting arm 18, first rectangular mounting Mounting plate 19, second rectangular mounting plate 20, middle bridge connecting arm mounting bracket 21, second connecting plate 22, third connecting arm 23, fourth connecting arm 24, third rectangular mounting plate 25, fourth rectangular mounting plate 26, rear bridge connecting arm mounting bracket 27, first lateral thrust rod upper bracket 28, first lateral thrust rod 29, first lateral thrust rod lower bracket 30, second lateral thrust rod upper bracket 31, second lateral thrust rod lower bracket 32, second lateral thrust rod 33. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0021] Embodiments of the present invention: Figure 1-Figure 5 As shown, a rear suspension structure of an unmanned mining truck includes a frame 1, a middle bridge crossbeam assembly 2 and a rear axle crossbeam assembly 3. The middle bridge crossbeam assembly 2 is respectively connected to the left longitudinal beam and the right longitudinal beam of the frame 1 through two middle bridge shock absorbers 4, the rear axle crossbeam assembly 3 is connected to the left longitudinal beam and the right longitudinal beam of the frame 1 through two rear axle shock absorbers 5, the middle bridge crossbeam assembly 2 is connected to the lower crossbeam 7 at the bottom of the frame 1 through the middle bridge connecting arm 6, and the rear axle crossbeam assembly 3 is connected to the stable base crossbeam 9 at the bottom of the frame 1 through the rear axle connecting arm 8.

[0022] The present application connects the vehicle frame 1 with the center bridge crossbeam assembly 2 and the rear bridge crossbeam assembly 3 through two center bridge shock absorbers 4 and two rear bridge shock absorbers 5. The weight of the cargo in the unmanned mining truck compartment is transferred to the center bridge crossbeam assembly 2 and the rear bridge crossbeam assembly 3 through the two center bridge shock absorbers 4 and the two rear bridge shock absorbers 5, and then transferred to the ground through the wheels on the center bridge crossbeam assembly 2 and the rear bridge crossbeam assembly 3.

[0023] The middle bridge shock absorber 4 and the rear bridge shock absorber 5 are existing products and can be directly purchased. The maximum load-bearing capacity of the shock absorber can be customized according to demand. The rear suspension structure of the present application can withstand the weight of up to hundreds of tons of ore without damage.

[0024] The middle bridge cross beam assembly 2 is connected to the lower cross beam 7 at the bottom of the frame 1 through the middle bridge connecting arm 6, and the rear bridge cross beam assembly 3 is connected to the stable base cross beam 9 at the bottom of the frame 1 through the rear bridge connecting arm 8. Through the arrangement of the middle bridge connecting arm 6 and the rear bridge connecting arm 8, a connection relationship is established between the middle bridge cross beam assembly 2 and the rear bridge cross beam assembly 3 and the frame 1, and the middle bridge cross beam assembly 2 and the rear bridge cross beam assembly 3 and the frame 1 only change the spacing in the vertical direction without generating lateral displacement with each other.

[0025] Specifically, a first mounting groove 10 and a second mounting groove 11 are provided at the bottom of the left longitudinal beam and the right longitudinal beam of the frame 1. Two first mounting plates 12 are welded and fixed in the first mounting groove 10, and two second mounting plates 13 are welded and fixed in the second mounting groove 11. A first pin is installed on the two first mounting plates 12, and a second pin is installed on the two second mounting plates 13. The upper end of the mid-axle shock absorber 4 is rotatably connected to the first pin, and the upper end of the rear-axle shock absorber 5 is rotatably connected to the second pin.

[0026] The position of the first mounting groove 10 at the bottom of the left longitudinal beam of the frame 1 is symmetrically arranged with the first mounting groove 10 at the bottom of the right longitudinal beam of the frame 1, and two first mounting plates 12 are welded and fixed in the two first mounting grooves 10; similarly, the second mounting groove 11 at the bottom of the left longitudinal beam of the frame 1 is symmetrically arranged with the second mounting groove 11 at the bottom of the right longitudinal beam of the frame 1, and two second mounting plates 13 are welded and fixed in the two second mounting grooves 11.

[0027] Two middle bridge shock absorber lower mounting brackets 14 are welded and fixed on the rear side surface of the middle bridge crossbeam assembly 2. The two middle bridge shock absorber lower mounting brackets 14 are symmetrically arranged on the left and right sides of the rear side surface of the middle bridge crossbeam assembly 2. Second pin shafts are installed on the two middle bridge shock absorber lower mounting brackets 14. The lower ends of the two middle bridge shock absorbers 4 are rotatably connected to the second pin shafts on the two middle bridge shock absorber lower mounting brackets 14 respectively.

[0028] Two rear axle shock absorber lower mounting brackets 15 are welded and fixed on the rear side surface of the rear axle cross beam assembly 3. The two rear axle shock absorber lower mounting brackets 15 are symmetrically arranged on the left and right sides of the rear side surface of the rear axle cross beam assembly 3. The two rear axle shock absorber lower mounting brackets 15 are both installed with a third pin shaft, and the lower ends of the two rear axle shock absorbers 5 are respectively rotatably connected to the two rear axle shock absorber lower mounting brackets 15 and the third pin shaft.

[0029] Furthermore, the middle bridge connecting arm 6 includes a first connecting plate 16, a first connecting arm 17 and a second connecting arm 18, one end of the first connecting arm 17 and the second connecting arm 18 are welded and fixed to the first connecting plate 16, the other end of the first connecting arm 17 is welded and fixed with a first rectangular mounting plate 19, the first rectangular mounting plate 19 is fixedly connected to the right side of the front side wall of the middle bridge crossbeam assembly 2 by bolts, the other end of the second connecting arm 18 is welded and fixed with a second rectangular mounting plate 20, the second rectangular mounting plate 20 is fixedly connected to the left side of the front side wall of the middle bridge crossbeam assembly 2 by bolts, a middle bridge connecting arm mounting bracket 21 is welded to the rear side wall of the lower crossbeam 7, a fourth pin is installed on the middle bridge connecting arm mounting bracket 21, and the first connecting plate 16 is rotatably connected to the fourth pin.

[0030] The first connecting arm 17 and the second connecting arm 18 are in a V-shaped structure, so that the first connecting arm 17 and the second connecting arm 18 form a triangular support structure after being connected to the middle bridge cross beam assembly 2, thereby improving the stability of the support. The position where the first connecting plate 16 is connected to the middle bridge connecting arm mounting bracket 21 is higher than the position where the first connecting arm 17 and the second connecting arm 18 are connected to the middle bridge cross beam assembly 2. In this way, the first connecting arm 17 and the second connecting arm 18 can avoid the transmission shaft and will not interfere with the transmission shaft.

[0031] The rear axle connecting arm 8 includes a second connecting plate 22, a third connecting arm 23 and a fourth connecting arm 24, one end of the third connecting arm 23 and the fourth connecting arm 24 are welded and fixed to the second connecting plate 22, the other end of the third connecting arm 23 is welded and fixed with a third rectangular mounting plate 25, the third rectangular mounting plate 25 is fixedly connected to the left side of the front side wall of the rear axle cross beam assembly 3 by bolts, the other end of the fourth connecting arm 24 is welded and fixed with a fourth rectangular mounting plate 26, the fourth rectangular mounting plate 26 is fixedly connected to the right side of the front side wall of the rear axle cross beam assembly 3 by bolts, a rear axle connecting arm mounting bracket 27 is welded to the bottom of the stabilizing base beam 9, a fifth pin is installed on the rear axle connecting arm mounting bracket 27, and the second connecting plate 22 is rotatably connected to the fifth pin.

[0032] The structure of the rear axle connecting arm 8 is exactly the same as that of the middle axle connecting arm 6. The rear axle connecting arm 8 can also effectively avoid the transmission shaft and will not interfere with the transmission shaft.

[0033] It should be noted that the frame 1, the lower cross beam 7 and the stabilizing base cross beam 9 are all prior art, and since the size of the frame 1 is relatively large, the present application does not protect the structure of the frame 1, and therefore only the portion of the frame 1 related to the rear suspension structure is shown in the figure, and the portion of the frame 1 not related to the rear suspension structure is not shown.

[0034] Furthermore, a first lateral thrust rod upper bracket 28 is welded and fixed on the bottom surface of the right longitudinal beam of the frame 1, and the upper end of the first lateral thrust rod 29 is rotatably connected to the first lateral thrust rod upper bracket 28 through the sixth pin shaft. A first lateral thrust rod lower bracket 30 is welded and fixed on the right side of the top surface of the middle bridge crossbeam assembly 2, and the lower end of the first lateral thrust rod 29 is rotatably connected to the first lateral thrust rod lower bracket 30 through the seventh pin shaft.

[0035] A second transverse thrust rod upper bracket 31 is welded and fixed to the bottom surface of the right longitudinal beam of the frame 1, and a second transverse thrust rod lower bracket 32 ​​is welded to the left side of the top surface of the rear axle cross beam assembly 3. The upper end of the second transverse thrust rod 33 is rotatably connected to the second transverse thrust rod upper bracket 31 through the eighth pin shaft, and the lower end of the second transverse thrust rod 33 is rotatably connected to the second transverse thrust rod lower bracket 32 ​​through the ninth pin shaft.

[0036] The present application can establish a connection relationship between the frame 1 and the middle bridge crossbeam assembly 2 and the rear bridge crossbeam assembly 3 in the lateral direction by setting the first lateral thrust rod 29 and the second lateral thrust rod 33. This can effectively improve the lateral stability of the unmanned mining truck. When the unmanned mining truck is driving on a road full of large potholes or slopes, the first lateral thrust rod 29 and the second lateral thrust rod 33 can prevent the middle bridge crossbeam assembly 2 and the rear bridge crossbeam assembly 3 from lateral deviation, thereby ensuring the vehicle's driving stability and reducing the risk of accidents such as rollover.

[0037] The rear suspension structure of the present application is simple, with fewer parts and components, and a relatively low probability of failure. Compared with the rear suspension structure in the prior art, it is less likely to fail in the harsh environment of the mine, such as dusty and frequent stone collisions. Maintenance personnel can more easily understand and maintain the vehicle, and when a problem occurs with the vehicle, they can quickly perform maintenance, reducing the downtime of the vehicle and improving the efficiency of mining operations.

[0038] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. An unmanned mining truck rear suspension structure, comprising a vehicle frame (1), a middle bridge crossbeam assembly (2) and a rear bridge crossbeam assembly (3), characterized in that: The middle bridge crossbeam assembly (2) is respectively connected to the left longitudinal beam and the right longitudinal beam of the frame (1) through two middle bridge shock absorbers (4); the rear bridge crossbeam assembly (3) is connected to the left longitudinal beam and the right longitudinal beam of the frame (1) through two rear bridge shock absorbers (5); the middle bridge crossbeam assembly (2) is connected to the lower crossbeam (7) at the bottom of the frame (1) through a middle bridge connecting arm (6); and the rear bridge crossbeam assembly (3) is connected to the stabilizing base crossbeam (9) at the bottom of the frame (1) through a rear bridge connecting arm (8).

2. The unmanned mining truck rear suspension structure according to claim 1 is characterized in that: A first mounting groove (10) and a second mounting groove (11) are provided at the bottom of the left longitudinal beam and the right longitudinal beam of the vehicle frame (1); two first mounting plates (12) are welded and fixed in the first mounting groove (10); two second mounting plates (13) are welded and fixed in the second mounting groove (11); a first pin is mounted on the two first mounting plates (12); a second pin is mounted on the two second mounting plates (13); the upper end of the mid-axle shock absorber (4) is rotatably connected to the first pin, and the upper end of the rear-axle shock absorber (5) is rotatably connected to the second pin.

3. The unmanned mining truck rear suspension structure according to claim 2 is characterized in that: Two middle axle shock absorber lower mounting brackets (14) are welded and fixed on the rear side surface of the middle axle cross beam assembly (2), a second pin is mounted on the middle axle shock absorber lower mounting bracket (14), and the lower end of the middle axle shock absorber (4) is rotatably connected to the second pin; two rear axle shock absorber lower mounting brackets (15) are welded and fixed on the rear side surface of the rear axle cross beam assembly (3), a third pin is mounted on the rear axle shock absorber lower mounting bracket (15), and the lower end of the rear axle shock absorber (5) is rotatably connected to the third pin.

4. The unmanned mining truck rear suspension structure according to claim 1 is characterized in that: The middle bridge connecting arm (6) comprises a first connecting plate (16), a first connecting arm (17) and a second connecting arm (18), one end of each of the first connecting arm (17) and the second connecting arm (18) being welded and fixed to the first connecting plate (16), the other end of the first connecting arm (17) being welded and fixed to a first rectangular mounting plate (19), the first rectangular mounting plate (19) being fixedly connected to the right side of the front side wall of the middle bridge cross beam assembly (2) by bolts, the other end of the second connecting arm (18) being welded and fixed to a second rectangular mounting plate (20), the second rectangular mounting plate (20) being fixedly connected to the left side of the front side wall of the middle bridge cross beam assembly (2) by bolts, a middle bridge connecting arm mounting bracket (21) being welded to the rear side wall of the lower cross beam (7), a fourth pin being mounted on the middle bridge connecting arm mounting bracket (21), and the first connecting plate (16) being rotatably connected to the fourth pin.

5. The unmanned mining truck rear suspension structure according to claim 4 is characterized in that: The rear axle connecting arm (8) comprises a second connecting plate (22), a third connecting arm (23) and a fourth connecting arm (24); one end of each of the third connecting arm (23) and the fourth connecting arm (24) is welded and fixed to the second connecting plate (22); a third rectangular mounting plate (25) is welded and fixed to the other end of the third connecting arm (23); the third rectangular mounting plate (25) is fixedly connected to the left side of the front side wall of the rear axle cross beam assembly (3) by bolts; a fourth rectangular mounting plate (26) is welded and fixed to the other end of the fourth connecting arm (24); the fourth rectangular mounting plate (26) is fixedly connected to the right side of the front side wall of the rear axle cross beam assembly (3) by bolts; a rear axle connecting arm mounting bracket (27) is welded to the bottom of the stabilizing base cross beam (9); a fifth pin is mounted on the rear axle connecting arm mounting bracket (27); and the second connecting plate (22) is rotatably connected to the fifth pin.

6. The unmanned mining truck rear suspension structure according to claim 5 is characterized in that: A first lateral thrust rod upper bracket (28) is welded and fixed on the bottom surface of the right longitudinal beam of the vehicle frame (1), and the upper end of the first lateral thrust rod (29) is rotatably connected to the first lateral thrust rod upper bracket (28) via a sixth pin shaft. A first lateral thrust rod lower bracket (30) is welded and fixed on the right side of the top surface of the middle bridge crossbeam assembly (2), and the lower end of the first lateral thrust rod (29) is rotatably connected to the first lateral thrust rod lower bracket (30) via a seventh pin shaft.

7. The unmanned mining truck rear suspension structure according to claim 6 is characterized in that: A second transverse thrust rod upper bracket (31) is welded and fixed to the bottom surface of the right longitudinal beam of the vehicle frame (1), a second transverse thrust rod lower bracket (32) is welded to the left side of the top surface of the rear axle cross beam assembly (3), an upper end of the second transverse thrust rod (33) is rotatably connected to the second transverse thrust rod upper bracket (31) via an eighth pin, and a lower end of the second transverse thrust rod (33) is rotatably connected to the second transverse thrust rod lower bracket (32) via a ninth pin.

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