Off-highway mine trailer

Abstract

The off-highway mining trailer comprises a tractor and a first trailer body, the tractor comprises a tractor frame, a steering wheel set and at least one first driving wheel set, the steering wheel set is connected to the tractor frame and used for adjusting the driving direction of the tractor, and the first driving wheel set is connected to the tractor frame and used for driving the tractor to move. The first trailer comprises a first trailer frame, the first trailer frame is detachably connected to the tail of the traction vehicle frame and can rotate relative to the traction vehicle frame, the first trailer frame is provided with at least one wheel set installation position, and at least one of the at least one wheel set installation position is a variable installation position. The variable mounting position is configured to mount the second driving wheel set or the first driven wheel set; wherein the second driving wheel set is used for driving the first trailer to move, and the first driven wheel set is used for bearing the weight of the first trailer and goods on the first trailer.

Description

Technical Field

[0001] This application relates to an off-highway mining trailer. Background Technology

[0002] Mining trailers, as core equipment for transporting mining materials, consist of a tractor and a trailer. The trailer is attached to the rear of the tractor, which provides traction power and driving control, while the trailer carries heavy materials such as ore and slag. However, existing mining trailers suffer from significant power shortages under complex working conditions in mines, such as heavy loads, steep slopes, and soft road surfaces, severely restricting transportation efficiency. Therefore, there is an urgent need for a technical solution that can improve the overall power performance of the vehicle. Summary of the Invention

[0003] This application provides an off-highway mining trailer to solve the problem of insufficient vehicle power in the prior art.

[0004] The off-highway mining trailer of this application embodiment includes: A tractor unit includes a tractor frame, a steering wheel assembly, and at least one first drive wheel assembly. The steering wheel assembly is connected to the tractor frame and is used to adjust the traveling direction of the tractor unit. The first drive wheel assembly is connected to the tractor frame and is used to drive the tractor unit to move. A first trailer includes a first trailer frame, which is detachably connected to the rear of the tractor frame and rotatable relative to the tractor frame. The first trailer frame has at least one wheel mounting position, at least one of which is a variable mounting position configured to mount a second drive wheel set or a first driven wheel set. The second drive wheel set is used to drive the first trailer to move, and the first driven wheel set is used to bear the weight of the first trailer and the cargo on the first trailer.

[0005] According to some embodiments of this application, the tractor also includes a power battery disposed on the tractor frame. When the second drive wheel set is installed in the variable mounting position, the power battery is electrically connected to the first drive wheel set and the second drive wheel set respectively, and is used to provide power to the first drive wheel set and the second drive wheel set.

[0006] According to some embodiments of this application, both the first drive wheel set and the second drive wheel set include a drive motor, a reducer, and a drive wheel. The drive motor is electrically connected to the power battery and is used to receive power provided by the power battery. The drive motor drives the drive wheel to rotate through the reducer.

[0007] According to some embodiments of this application, it also includes: A trailer includes a trailer frame and at least one second driven wheel set, the trailer frame being detachably connected to the rear of a first trailer frame and rotatable relative to the first trailer frame, and the second driven wheel set being connected to the trailer frame; The second trailer includes a second trailer frame and at least one third driven wheel set. The second trailer frame is detachably connected to the rear of the trailer frame and is rotatable relative to the trailer frame. The third driven wheel set is connected to the second trailer frame.

[0008] According to some embodiments of this application, the first drive wheel set is connected to the tractor frame via a first hydropneumatic suspension, and the second drive wheel set or the first driven wheel set is mounted on the wheel set mounting position via a second hydropneumatic suspension. The second driven wheel set is connected to the trailer frame via a first circular spring shock absorber suspension, and the third driven wheel set is connected to the second trailer frame via a second circular spring shock absorber suspension.

[0009] According to some embodiments of this application, at least one of the second driven wheel sets is disposed below the second trailer frame.

[0010] According to some embodiments of this application, the off-highway mining trailer further includes a hydraulic system mounted on the tractor frame. The hydraulic system is used to provide steering assistance to the steering wheel set, to provide braking force to the first drive wheel set and the second drive wheel set, and to provide lifting force for unloading the cargo box on the first trailer frame and the cargo box on the second trailer frame.

[0011] According to some embodiments of this application, the tractor frame, the first trailer frame, the trailer frame, and the second trailer frame are all made of high-strength low-alloy structural steel with a strength of 600MPa or higher.

[0012] According to some embodiments of this application, the off-highway mining trailer further includes a lubrication system disposed on the tractor frame for lubricating various lubrication points in the tractor, the first trailer, the trailer, and the second trailer.

[0013] According to some embodiments of this application, a high-voltage safety protection system is also included to ensure driving safety.

[0014] An embodiment of the above application has at least the following advantages or beneficial effects: The off-highway mining trailer of this embodiment has at least one variable mounting position on its first trailer frame. This variable mounting position is used to install either a second drive wheel set for driving or a first driven wheel set for load bearing. This means that not only is a first drive wheel set installed on the tractor, but a second drive wheel set is also installed on the first trailer. The combined effect of the first and second drive wheel sets significantly improves the overall vehicle's power performance, providing sufficient power even under complex working conditions such as heavy loads, steep slopes, and soft road surfaces in mines. Furthermore, because the first trailer frame has at least one variable mounting position, and this position can selectively install either the second drive wheel set or the first driven wheel set, the number of second drive wheel sets on the first trailer can be adjusted as needed to handle different working conditions, making the wheel set installation more flexible and versatile. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0016] Figure 1 This is a side view of an off-highway mining trailer according to an embodiment of this application.

[0017] Figure 2 yes Figure 1 Side view of the tractor unit.

[0018] Figure 3 yes Figure 1 Side view of the first trailer in the middle.

[0019] Figure 4 yes Figure 1 A 3D diagram of a medium-sized trailer.

[0020] Figure 5 yes Figure 1 Front view of the trailer.

[0021] Figure 6 yes Figure 1 Side view of the second trailer.

[0022] The reference numerals in the attached figures are explained as follows: 100. Tractor 110. Tractor frame 120. Steering wheel assembly 130. First drive wheel set 140. Power Battery 150. First type of hydropneumatic suspension 200, First trailer 210. First trailer frame 211. Wheelset mounting position 2111, Variable mounting position 220. Second drive wheel set 230. First driven gear set 240. Second hydropneumatic suspension 300, trailer 310. Trailer frame 320. Second driven gear set 330. First circular spring shock absorber suspension 400, Second Trailer 410. Second trailer frame 420. Third driven gear set 430. Second circular spring shock absorber suspension 500. Hydraulic System 600. Lubrication System Detailed Implementation

[0023] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0024] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0025] Unless otherwise specified, in the claims and description, the terms “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “rear,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0026] like Figures 1 to 3As shown, the off-highway mining trailer of this application embodiment includes a tractor 100 and a first trailer 200. The tractor unit 100 includes a tractor frame 110, a steering wheel assembly 120, and at least one first drive wheel assembly 130. The steering wheel assembly 120 is connected to the tractor frame 110 and is used to adjust the driving direction of the tractor unit 100. The first drive wheel assembly 130 is connected to the tractor frame 110 and is used to drive the tractor unit 100 to move. The first trailer 200 includes a first trailer frame 210, which is connected to the rear of the tractor frame 110 and is rotatable relative to the tractor frame 110. The first trailer frame 210 has at least one wheel assembly mounting position 211, at least one of which is a variable mounting position 2111. The variable mounting position 2111 is configured to mount a second drive wheel assembly 220 or a first driven wheel assembly 230. The second drive wheel assembly 220 is used to drive the first trailer 200 to move, and the first driven wheel assembly 230 is used to bear the weight of the first trailer 200 and the cargo on the first trailer 200.

[0027] In this embodiment of the off-highway mining trailer, the first trailer frame 210 of the first trailer 200 is provided with at least one variable mounting position 2111. The variable mounting position 2111 is used to install a second drive wheel set 220 that plays a driving role or a first driven wheel set 230 that plays a load-bearing role. In this way, not only is the first drive wheel set 130 provided on the tractor 100, but the second drive wheel set 220 is also provided on the first trailer 200. Under the combined action of the first drive wheel set 130 and the second drive wheel set 220, the power performance of the whole vehicle is significantly improved. When facing complex working conditions such as heavy loads in mines, steep slopes, and soft road surfaces, the whole vehicle also has sufficient power. In addition, since the first trailer frame 210 is provided with at least one variable mounting position 2111, and the variable mounting position 2111 can selectively install the second drive wheel set 220 or the first driven wheel set 230, when the off-highway mining trailer of this embodiment faces different working conditions, the number of the second drive wheel set 220 of the first trailer 200 can be adjusted as needed, making the installation of the wheel set more flexible and versatile.

[0028] by Figure 3 The second drive wheel set 220 and the first driven wheel set 230 installed on the first trailer frame 210 will be described as an example.

[0029] The first trailer frame 210 is provided with at least one wheel mounting position 211, for example, the number of wheel mounting positions 211 is three. In other embodiments, the first trailer frame 210 may provide one, two, four, five or other numbers of wheel mounting positions 211.

[0030] At least one of the at least three wheel mounting positions 211 is a variable mounting position 2111. For example, one of the three wheel mounting positions 211 is a variable mounting position 2111, or all of the three wheel mounting positions 211 are variable mounting positions 2111.

[0031] by Figure 3 For example, one of the three wheel mounting positions 211 is a variable mounting position 2111, and the other two wheel mounting positions 211 are used to install the first driven wheel set 230. The variable mounting position 2111 is used to install the second drive wheel set 220 or the first driven wheel set 230.

[0032] For example, when the cargo on the first trailer 200 is heavy, the variable mounting position 2111 can install the second drive wheel set 220. Both the second drive wheel set 220 and the first drive wheel set 130 serve as power wheel sets, improving the overall power performance of the vehicle.

[0033] When the cargo on the first trailer 200 is relatively light, the power of the first drive wheel set 130 is sufficient to drive the entire vehicle to move. At this time, the first driven wheel set 230 can be installed at the variable mounting position 2111.

[0034] It is understandable that when the first trailer frame 210 has multiple wheel assembly mounting positions 211, and at least one wheel assembly mounting position 211 is not a variable mounting position 2111, then the first driven wheel assembly 230 is mounted on that wheel assembly mounting position 211.

[0035] like Figure 3 As shown, when one of the multiple wheel assembly mounting positions 211 is a variable mounting position 2111, the variable mounting position 2111 can be located near the rear of the first trailer frame 210, near the head of the first trailer frame 210, or in the middle of the multiple wheel assembly mounting positions 211.

[0036] It should be noted that the term "head" refers to the front area of ​​the vehicle along the preset direction of travel, and the term "tail" refers to the rear area of ​​the vehicle along the preset direction of travel.

[0037] like Figure 1 As shown, the tractor 100 also includes a power battery 140 mounted on the tractor frame 110. When the second drive wheel set 220 is mounted on the variable mounting position 2111, the power battery 140 is electrically connected to the first drive wheel set 130 and the second drive wheel set 220 respectively, and is used to provide power to the first drive wheel set 130 and the second drive wheel set 220 so that the first drive wheel set 130 drives the tractor 100 to move, and the second drive wheel set 220 drives the first trailer 200 to move.

[0038] In this embodiment, the power battery 140 on the tractor frame 110 serves as the power source for the first drive wheel set 130 and the second drive wheel set 220, meaning the entire vehicle is purely electric. The purely electric trailer uses the power battery 140 as its energy source, resulting in zero exhaust emissions during operation. Compared to gasoline-powered vehicles, the pure electric trailer of this embodiment offers advantages such as high efficiency and zero emissions, demonstrating significant advantages in energy conservation and environmental protection. Furthermore, since the power battery 140 is mounted on the tractor frame 110, it does not occupy space in the cargo box of the first trailer 200, thus increasing the trailer's carrying capacity.

[0039] In one embodiment, the off-highway mining trailer of this application is also equipped with an energy recovery system, which can achieve zero pollution emissions and also contribute to the construction of green mines.

[0040] In one embodiment, both the first drive wheel set 130 and the second drive wheel set 220 include a drive motor, a reducer, and a drive wheel. The drive motor is electrically connected to the power battery 140 and is used to receive power provided by the power battery 140. The drive motor drives the drive wheel to rotate through the reducer.

[0041] In this embodiment, the first drive wheel assembly 130 and the second drive wheel assembly 220 adopt a distributed modular design. That is, the first drive wheel assembly 130 includes a drive motor, a reducer and a drive wheel, and the second drive wheel assembly 220 includes a drive motor, a reducer and a drive wheel, which makes it easier to install and remove the variable mounting position 2111 when it is changed from the first driven wheel assembly 230 to the second drive wheel assembly 220.

[0042] In one embodiment, the power battery 140 can be electrically connected to the first drive wheel assembly 130 and the second drive wheel assembly 220 via a wiring harness.

[0043] In one embodiment, the drive motor can be a permanent magnet motor.

[0044] In one exemplary embodiment, the tractor frame 110 is provided with two first drive wheel sets 130, and the first trailer frame 210 is provided with two first driven wheel sets 230 and a second drive wheel set 220.

[0045] Please return to the reference. Figure 1The off-highway mining trailer of this application embodiment also includes a trailer 300 and a second trailer 400. The trailer 300 includes a trailer frame 310 and at least one second driven wheel set 320. The trailer frame 310 is detachably connected to the rear of the first trailer frame 210 and is rotatable relative to the first trailer frame 210. The second driven wheel set 320 is connected to the trailer frame 310. The second trailer 400 includes a second trailer frame 410 and at least one third driven wheel set 420. The second trailer frame 410 is detachably connected to the rear of the trailer frame 310 and is rotatable relative to the trailer frame 310. The third driven wheel set 420 is connected to the second trailer frame 410.

[0046] The off-highway mining trailer of this embodiment includes a first trailer 200, a second trailer 400, and a trailer 300 connected between the first trailer 200 and the second trailer 400. The trailer 300 is detachably connected to the rear of the first trailer 200, and the second trailer 400 is detachably connected to the rear of the trailer 300. This allows the rear of the tractor 100 to be configured with either the first trailer 200 or the first trailer 200 and the second trailer 400 as needed. In other words, the tractor 100 and the trailers in this embodiment can be freely combined to form a double-trailer or single-trailer structure to adapt to different road conditions.

[0047] In an exemplary embodiment, the first trailer frame 210 is connected to the tractor frame 110 via a saddle and a towing pin, the trailer frame 310 is connected to the first trailer frame 210 via a saddle and a towing pin, and the second trailer frame 410 is connected to the trailer frame 310 via a saddle and a towing pin.

[0048] Taking the connection between the first trailer frame 210 and the tractor frame 110 via a saddle and a towing pin as an example, the tractor 100 has a saddle at its rear, and the first trailer frame 210 has a towing pin at its front. The saddle has a V-shaped opening. When the first trailer frame 210 is connected to the tractor frame 110, the towing pin aligns with the V-shaped opening of the saddle. After the towing pin slides into the V-shaped opening of the saddle, the saddle locks the towing pin in place through a locking mechanism. In this way, the towing pin can rotate relative to the saddle in multiple directions without coming off the saddle.

[0049] like Figure 2 As shown, the first drive wheel assembly 130 is connected to the tractor frame 110 via the first hydropneumatic suspension 150, as... Figure 3 As shown, the second drive wheel set 220 or the first driven wheel set 230 is mounted on the wheel set mounting position 211 via the second hydropneumatic suspension 240; as Figure 4 and Figure 5 As shown, the second driven wheel assembly 320 is connected to the trailer frame 310 via the first coil spring shock absorber suspension 330, as... Figure 6The third driven wheel assembly 420 shown is connected to the second trailer frame 410 via the second circular spring shock absorber suspension 430.

[0050] In this embodiment, each wheel set is mounted on its corresponding frame via suspension. The suspension can effectively absorb vibration and impact, improving the stability and comfort of the vehicle and enabling the trailer to adapt to bumpy roads.

[0051] Furthermore, the tractor unit 100 and the first trailer 200 are equipped with hydropneumatic suspension, while the trailer 300 and the second trailer 400 are equipped with coil spring shock absorber suspension. The hydropneumatic suspension can significantly reduce frame vibration by adjusting the hydropneumatic pressure, thus providing a comfortable driving environment for the cab of the tractor unit 100. Compared to the first trailer 200, the trailer 300 and the second trailer 400 are further away from the tractor unit 100, so the lower-cost coil spring shock absorber suspension can be used. Although the coil spring shock absorber suspension does not have the same shock absorption effect as the hydropneumatic suspension, the slight vibration will not affect the comfort of the tractor unit 100's cab. Therefore, the combination of hydropneumatic suspension and coil spring shock absorber suspension not only ensures the smooth operation of the vehicle body but also reduces the overall cost of the vehicle.

[0052] like Figure 1 As shown, at least one of the at least two second driven wheel sets 320 is located below the second trailer frame 410.

[0053] In this embodiment, at least one of the second driven wheel sets 320 is located below the second trailer frame 410, so that the head of the second trailer frame 410 is not suspended in the air, but is supported by the second driven wheel set 320 of the trailer 300, thus significantly improving the load-bearing capacity of the trailer 300 and the second trailer 400.

[0054] In one exemplary embodiment, the trailer 300 is provided with two second driven wheel sets 320, one of which is located below the second trailer frame 410.

[0055] like Figure 2 As shown, the off-highway mining trailer also includes a hydraulic system 500 mounted on the tractor frame 110. The hydraulic system 500 is used to provide steering assistance to the steering wheel set 120, to provide braking force to the first drive wheel set 130 and the second drive wheel set 220, and to provide lifting force for unloading to the cargo box on the first trailer frame 210 and the cargo box on the second trailer frame 410.

[0056] In one embodiment, the off-highway mining trailer also includes a lubrication system 600 mounted on the tractor frame 110 for lubricating the lubrication points of the tractor 100, the first trailer, the trailer 300, and the second trailer 400, so that the whole vehicle can adapt to dusty environments.

[0057] In one embodiment, the off-highway mining trailer also includes a high-voltage safety protection system to ensure driving safety.

[0058] In one embodiment, the tractor frame 110, the first trailer frame 210, the trailer frame 310, and the second trailer frame 410 are all made of high-strength low-alloy structural steel with a strength of 600 MPa or higher.

[0059] Among them, a variable cross-section box structure was adopted for each of the aforementioned frames, and stiffeners were added inside the frame. Topology optimization design was carried out through finite element analysis, and the stress concentration areas of the frame were optimized and strengthened to form a structure with extremely strong torsional resistance, which significantly improved the structural strength of each frame.

[0060] Furthermore, the cargo boxes of the first trailer 200 and the second trailer 400 are made of high-strength wear-resistant alloy steel. The cargo box structure adopts a gradient-reinforced frame structure, and the longitudinal and transverse beams at the bottom of the cargo box adopt a box-shaped cross-section. In addition, a variable cross-section design was carried out based on finite element analysis, and reinforcing ribs were welded to the side plates and outer bottom plates of the cargo box. The layout of the reinforcing ribs was gradient-optimized according to the magnitude of the stress.

[0061] Furthermore, the cargo box adopts a side-opening door design, such as a left-side door, and uses a hydraulic automatic centralized locking mechanism to ensure the reliability of the door seal. During unloading, the cargo is tilted out by hydraulic cylinders on both sides.

[0062] In summary, the off-highway mining trailer of this application embodiment has at least the following advantages and beneficial effects: In this embodiment of the off-highway mining trailer, the first trailer frame 210 of the first trailer 200 is provided with at least one variable mounting position 2111. The variable mounting position 2111 is used to install a second drive wheel set 220 that plays a driving role or a first driven wheel set 230 that plays a load-bearing role. In this way, not only is the first drive wheel set 130 provided on the tractor 100, but the second drive wheel set 220 is also provided on the first trailer 200. Under the combined action of the first drive wheel set 130 and the second drive wheel set 220, the power performance of the whole vehicle is significantly improved, and it has sufficient power when facing complex working conditions such as heavy loads in mines, steep slopes, and soft road surfaces. In addition, since the first trailer frame 210 is provided with at least one variable mounting position 2111, and the variable mounting position 2111 can selectively install the second drive wheel set 220 or the first driven wheel set 230, when the off-highway mining trailer of this embodiment faces different working conditions, the number of the second drive wheel set 220 of the first trailer 200 can be adjusted as needed, making the installation of the wheel set more flexible and versatile.

[0063] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0064] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0065] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0066] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. An off-highway mining trailer characterized by, The traction vehicle comprises a traction vehicle frame, a steering wheel set connected to the traction vehicle frame for adjusting the driving direction of the traction vehicle, and at least one first driving wheel set connected to the traction vehicle frame for driving the traction vehicle to move. The first trailer comprises a first trailer frame which is detachably connected to the tail of the traction vehicle frame and rotatable relative to the traction vehicle frame, and has at least one wheel set mounting position, at least one of which is a variable mounting position configured to mount a second driving wheel set or a first driven wheel set, wherein the second driving wheel set is used to drive the first trailer to move, and the first driven wheel set is used to bear the weight of the first trailer and goods on the first trailer. The traction vehicle further comprises a power battery arranged on the traction vehicle frame, and when the variable mounting position is mounted with the second driving wheel set, the power battery is electrically connected with the first driving wheel set and the second driving wheel set respectively, for providing electric power to the first driving wheel set and the second driving wheel set. The first driving wheel set and the second driving wheel set each comprise a driving motor, a speed reducer and a driving wheel, the driving motor is electrically connected with the power battery for receiving the electric power provided by the power battery, and the driving motor drives the driving wheel to rotate through the speed reducer.

2. The off-highway mining trailer of claim 1, wherein, The trailer comprises a trailer frame and at least one second driven wheel set, the trailer frame is detachably connected to the tail of the first trailer frame and rotatable relative to the first trailer frame, and the second driven wheel set is connected to the trailer frame.

3. The off-highway mining trailer of claim 2, characterized by, The second trailer comprises a second trailer frame and at least one third driven wheel set, the second trailer frame is detachably connected to the tail of the trailer frame and rotatable relative to the trailer frame, and the third driven wheel set is connected to the second trailer frame.

4. The off-highway mining trailer according to any one of claims 1-3, characterized in that, The first driving wheel set is connected to the traction vehicle frame through a first oil-gas suspension, and the second driving wheel set or the first driven wheel set is mounted in the wheel set mounting position through a second oil-gas suspension. The second driven wheel set is connected to the trailer frame through a first circular spring damping suspension, and the third driven wheel set is connected to the second trailer frame through a second circular spring damping suspension. At least one of the second driven wheel sets is arranged below the second trailer frame.

5. The off-highway mining trailer of claim 4, wherein, The off-road mining trailer further comprises a hydraulic system arranged on the traction vehicle frame, which is used to provide steering assistance to the steering wheel set, braking force to the first driving wheel set and the second driving wheel set, and lifting force to the cargo box on the first trailer frame and the cargo box on the second trailer frame during unloading. The traction vehicle frame, the first trailer frame, the trailer frame and the second trailer frame are all made of high-strength low-alloy structural steel material with a strength of 600 MPa or above.

6. The off-highway mining trailer of claim 4, wherein, ​ 7. The off-highway mining trailer of claim 4, wherein, ​ 8. The off-highway mining trailer of claim 4, wherein, ​ 9. The off-highway mining trailer of claim 4, wherein, The off-highway mining trailer further comprises a lubricating system arranged on the towing frame, which is used for lubricating each lubricating point in the towing vehicle, the first trailer, the trailer and the second trailer.

10. The off-highway mining trailer according to any one of claims 1-3, characterized in that, A high-pressure safety protection system is further included to ensure driving safety.

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