Hinged mine truck transmission system and pipeline system thereof

Abstract

The invention discloses a hinged mine truck transmission system and a pipeline system thereof, and the transmission system comprises an engine, a torque converter, a drive axle, a gearbox, a transmission shaft and a retarder, the system further comprises a torque converter oil temperature sensor, a gearbox pressure sensor, a fault diagnosis displayer, a gearbox controller, a gearbox output rotating speed sensor, a locking electromagnetic valve, a gear shifting electromagnetic valve and an emergency walking module. The pipeline system comprises a dynamic system lubricating pump, a torque converter cooler, a transmission oil filter and a gearbox pressure regulating valve. A locking function is added to the gearbox and the torque converter, the vehicle running speed and traction force working condition requirements are considered, automatic gear shifting can be achieved according to load changes, and the operation intensity of a driver is reduced; the auxiliary braking capacity is increased under the long-distance downhill working condition, the problems that too much oil is stored in a torque converter, the internal pressure is increased and a respirator emits oil due to long-time use of a braking system are solved, and driving safety is guaranteed; various safety measures are achieved, and the service life of a transmission system is effectively prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of underground mining trucks, and in particular to an articulated mining truck transmission system and a pipeline system thereof. Background Art

[0002] Underground mining trucks are specially used as transportation tools at large-scale construction sites such as mines and quarries. They are used to transport boulders, soil and other materials that have been exploded or excavated to their destinations quickly and efficiently. They can operate stably under various harsh working conditions and are usually equipped with powerful power systems to cope with complex terrain and heavy-load tasks that may be encountered in underground environments.

[0003] The transmission system of large-tonnage mining trucks generally adopts a split torque converter and gearbox structure. The output power of the engine is increased by the torque converter and then transmitted to the gearbox through the drive shaft. The gearbox transmits the power to the rear drive axle and the front drive axle according to the gear selection. The operating conditions of large-tonnage underground mining trucks require the transmission system to comprehensively consider the operating speed and traction to ensure that both the operating efficiency and traction performance are met. At present, most manufacturers' 40-45T underground mining trucks are equipped with DANA's C8000 torque converter, 8000 series 4-speed gearbox, and Kessler axle, which makes the balance between driving speed and traction poor. Gears need to be switched frequently during driving, which increases the driver's operating intensity. The power performance cannot be switched adaptively according to the working conditions. When the mining truck enters a long-distance downhill condition, the torque converter cannot be locked. The lack of auxiliary braking makes the transmission oil circuit circulating oil unable to return to the gearbox oil pan in time, causing the main lubrication pump to be sucked empty. In addition, too much oil in the torque converter will cause the internal pressure to increase and the breather to leak oil. Summary of the invention

[0004] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an articulated mining truck transmission system and a pipeline system thereof.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following technical solution: an articulated mining truck transmission system, comprising: an engine and a gearbox, wherein the output end of the engine is transmission-connected to a torque converter;

[0007] One end of the gearbox is connected to the torque converter through a transmission shaft, and the other end of the gearbox is connected to the drive axle through a transmission shaft, and the drive axle includes a front drive axle and a rear drive axle;

[0008] A retarder is connected between the gearbox and the drive axle via a transmission shaft.

[0009] As a further description of the above technical solution, it also includes: a torque converter oil temperature sensor, a transmission pressure sensor, a fault diagnosis display, a transmission controller, a transmission output speed sensor, a locking solenoid valve, a shift solenoid valve and an emergency running module, and the transmission controller is electrically connected to the torque converter oil temperature sensor, the transmission pressure sensor, the fault diagnosis display, the transmission output speed sensor, the locking solenoid valve and the shift solenoid valve.

[0010] As a further description of the above technical solution, the transmission pressure sensor is arranged on the transmission, the torque converter oil temperature sensor is arranged on the torque converter, and when the transmission pressure is lower than a set value or the torque converter oil temperature is higher than a set value, the transmission controller controls the transmission to enter a neutral protection state.

[0011] As a further description of the above technical solution, the gearbox controller is arranged on the gearbox, and the gearbox controller detects load changes through the gearbox output speed sensor to adapt to the working condition and automatically shift gears;

[0012] The shift solenoid valve receives the shift signal from the transmission controller and switches to different gears through different logic combinations.

[0013] As a further description of the above technical solution, the locking solenoid valve is arranged on the gearbox, and the locking solenoid valve automatically locks based on the gear position by collecting the speed change detected by the gearbox output speed sensor through the gearbox controller.

[0014] As a further description of the above technical solution, the emergency running module, the transmission controller and the shift solenoid valve are electrically connected. After the emergency running module detects a failure of the transmission controller, the emergency running module controls the shift solenoid valve to switch to 1st gear.

[0015] The piping system of the articulated mining truck transmission system according to any of the above items comprises: a transmission system lubrication pump, a torque converter cooler, a transmission oil filter and a transmission pressure regulating valve;

[0016] The transmission system lubrication pump is arranged on the torque converter, the torque converter cooler is arranged on the torque converter, and the transmission pressure regulating valve is arranged on the transmission.

[0017] As a further description of the above technical solution, the transmission system lubrication pump includes a large-displacement lubrication pump and a small-displacement lubrication pump. The large-displacement lubrication pump is used to pump out the transmission oil in the gearbox, and the small-displacement lubrication pump is used to pump out the transmission oil at the bottom of the torque converter.

[0018] As a further description of the above technical solution, the large-displacement lubrication pump is connected to the transmission oil filter, the locking solenoid valve and the transmission pressure regulating valve through a pipeline, the small-displacement lubrication pump is connected to the torque converter and the transmission through a pipeline, and the torque converter cooler is connected to the torque converter and the transmission through a pipeline.

[0019] As a further description of the above technical solution, the transmission oil in the gearbox is diverted through the large-displacement lubrication pump through the transmission oil filter into the locking solenoid valve and the gearbox pressure regulating valve, and then enters the torque converter. The transmission oil in the torque converter is pumped into the gearbox through the small-displacement lubrication pump.

[0020] The present invention has the following beneficial effects:

[0021] 1. In the present invention, the gearbox integrates the shift solenoid valve and the locking solenoid valve, which reduces the difficulty of complex pipeline connection and whole machine layout, makes the shift speed curve smooth, and adds a locking function to the gearbox and torque converter, establishes a rigid connection between the engine and the gearbox, takes into account the vehicle's driving speed and traction working condition requirements, can realize automatic shifting according to load changes, and reduces the driver's operation intensity;

[0022] 2. The present invention has an independent retarder installed in the middle of the transmission shaft, which is not directly connected to the gearbox and the drive axle. It has a high degree of freedom in layout and installation, can be adapted to a variety of gearboxes, and can increase the auxiliary braking capacity in long-distance downhill conditions. It can continuously reduce or maintain a stable vehicle speed and reduce or release the load of the service brake, avoiding the problem of heating of the transmission oil and hydraulic oil caused by long-term use of the brake system, thereby ensuring driving safety;

[0023] 3. The present invention monitors vehicle operation data through sensors to implement safety measures such as automatic shift controller downshift protection, torque converter external oil temperature protection, and transmission pressure protection, effectively extending the service life of the transmission system;

[0024] 4. In the present invention, a pressure regulating valve for controlling the shifting pressure is integrated on the gearbox. The transmission oil pumped in from the large-displacement lubrication pump is filtered through the transmission oil filter, and then the pressure is controlled by the pressure regulating valve to supply the transmission clutch with the hydraulic shifting of the gears. The oil inlet of the locking solenoid valve also comes from the filter, and cannot reach the locking clutch in the non-locking state. The locking clutch can only work when the locking valve is energized. The small-displacement lubrication pump draws the oil at the bottom of the torque converter back to the gearbox oil pan, thus solving the problem that the circulating oil in the transmission oil circuit cannot return to the gearbox oil pan in time, causing the main lubrication pump to be emptied, and the problem that too much oil is stored in the torque converter and the internal pressure increases, causing oil leakage from the breather. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front view of an articulated mining truck transmission system provided by an embodiment of the present invention;

[0026] Figure 2 is a top view of an articulated mining truck transmission system provided by an embodiment of the present invention;

[0027] Figure 3 This is a power matching calculation diagram of the articulated mining truck transmission system provided by an embodiment of the present invention;

[0028] Figure 4 The figure is a schematic diagram of a transmission system for an articulated mining truck provided in an embodiment of the present invention.

[0029] Figure 5 The present invention is a schematic diagram of a pipeline system of an articulated mining truck transmission system provided in an embodiment of the present invention.

[0030] Legend:

[0031] 1. Engine; 2. Torque converter; 3. Front drive axle; 4. Gearbox; 5. Drive shaft; 6. Retarder; 7. Rear drive axle; 8. Torque converter oil temperature sensor; 9. Gearbox pressure sensor; 10. Fault diagnosis display; 11. Gearbox controller; 12. Gearbox output speed sensor; 13. Locking solenoid valve; 14. Shift solenoid valve; 15. Emergency running module; 16. Transmission system lubrication pump; 161. Large displacement lubrication pump; 162. Small displacement lubrication pump; 17. Torque converter cooler; 18. Transmission oil filter; 19. Gearbox pressure regulating valve. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Please refer to the following examples for details:

[0034] Reference Figure 1 An embodiment of an articulated mining truck transmission system provided by the present invention includes: an engine 1, a torque converter 2, a front drive axle 3, a gearbox 4, a transmission shaft 5, a retarder 6 and a rear drive axle 7.

[0035] The output end of the engine 1 is connected to the torque converter 2 through transmission, one end of the gearbox 4 is connected to the torque converter 2 through the transmission shaft 5, and the other end of the gearbox 4 is connected to the drive axle through the transmission shaft 5.

[0036] Exemplarily, the drive axle includes a front drive axle 3 and a rear drive axle 7 , and a retarder 6 is connected between the gearbox 4 and the rear drive axle 7 via a transmission shaft 5 .

[0037] Please continue reading Figure 1-Figure 2 In the present application, the output power of the engine 1 is increased in torque by the torque converter 2 and then transmitted to the gearbox 4 through the transmission shaft 5. Then the gearbox 4 transmits the power to the front drive axle 3 and the rear drive axle 7 according to the gear selection, and the hydraulic retarder 6 on the transmission chain of the rear output of the gearbox 4 to the rear drive axle 7 plays the role of reducing the vehicle's driving speed.

[0038] Exemplarily, the torque converter 2 is of model CL9000, and the torque increase bias ratio is 1.118. The gear ratios of the transmission 4 and the axle ratios are comprehensively considered, and the requirements of large traction in low-speed gears and high driving speed in high-speed gears can be met. At the same time, the torque converter 2 is also equipped with a locking function to improve the efficiency of the torque converter 2 under high transmission ratio conditions. On good roads, the locking function makes the input and output shafts of the transmission become rigid connections, which can effectively improve the driving speed and fuel economy.

[0039] Exemplarily, the 4-gear configuration of the transmission is 8 front and 4 rear; the speed ratio is 4.1 for the 1st gear, which meets the low-speed heavy-load or climbing conditions; the speed ratio is 0.54 for the 8th gear, which meets the no-load high-speed operation conditions.

[0040] Exemplarily, the front drive axle 3 and the rear drive axle 7 use a DANA 53R axle with a load capacity of 50T and a speed ratio of 30.3; in addition, the front drive axle 3 and the rear drive axle 7 are equipped with spring-brake hydraulically released safety brakes, so that the braking torque and load capacity are better than other axles without safety brakes.

[0041] Furthermore, the independent hydraulic retarder 6 is installed in the middle of the beam, and is not directly connected to the gearbox 4 and the drive axle. When applied to large-tonnage mining trucks, it has a high degree of freedom in layout and installation, and can be adapted to various types of gearboxes 4. Moreover, the setting scheme is expandable, so it can also be applied to open-air expansion trucks. In long-distance downhill conditions, it can effectively increase the auxiliary braking capacity, continuously reduce or maintain a stable vehicle speed, and reduce or release the load of the service brake, avoiding the problem of heating of the transmission oil and hydraulic oil caused by long-term use of the brake system, and ensuring driving safety.

[0042] Please continue reading Figure 3 After power matching calculation, the CL9000 torque converter 2, 8821 gearbox 4, and 53R axle are used. The vehicle's traction can reach 330kN and the maximum speed can reach 32km / h, which is better than other configurations.

[0043] like Figure 4 As shown, in another embodiment, a transmission system of an articulated mining truck transmission mechanism includes: a torque converter oil temperature sensor 8, a gearbox pressure sensor 9, a fault diagnosis display 10, a gearbox controller 11, a gearbox output speed sensor 12, a locking solenoid valve 13, a shift solenoid valve 14 and an emergency travel module 15.

[0044] The transmission controller 11 is electrically connected to the torque converter oil temperature sensor 8 , the transmission pressure sensor 9 , the fault diagnosis display 10 , the transmission output speed sensor 12 , the locking solenoid valve 13 and the shift solenoid valve 14 .

[0045] Specifically, the TCU transmission controller 11 communicates with the vehicle controller and the engine 1 through the CAN bus protocol, receives communication signals such as the vehicle's parking brake signal and the driver's presence signal, and provides safety protection for the vehicle and the driver.

[0046] In addition, the TCU transmission controller 11 is also equipped with a fault diagnosis display 10 of model RD120, which can display transmission system operating parameters such as transmission 4 gears, engine 1 speed, transmission 4 oil pressure, torque converter 2 oil temperature, etc.; at the same time, the RD120 fault diagnosis display 10 can display the fault code of the transmission system in real time, and maintenance personnel can find solutions based on the displayed fault code to facilitate fault diagnosis.

[0047] Furthermore, a transmission pressure sensor 9 is arranged on the transmission 4, and a torque converter oil temperature sensor 8 is arranged on the torque converter 2, so as to monitor the transmission system operating parameters in real time; when the transmission 4 pressure is lower than a set value or the torque converter 2 oil temperature is higher than a set value, the transmission controller 11 controls the transmission 4 to enter a neutral protection state.

[0048] For example, when the oil temperature of the torque converter 2 is higher than 120°C, the transmission 4 will enter neutral protection to prevent the transmission 4 from being damaged due to high temperature; when the pressure of the transmission 4 is lower than 12 bar, the transmission 4 will also enter neutral protection to prevent the transmission 4 from malfunctioning due to insufficient clutch pressure and insufficient lubrication.

[0049] Furthermore, the transmission controller 11 is disposed on the transmission 4 , and the transmission controller 11 detects load changes through the transmission output speed sensor 12 and adapts to the working conditions to perform automatic gear shifting.

[0050] Specifically, the shift solenoid valve 14 is arranged on the gearbox 4. The shift solenoid valve 14 receives the shift signal from the gearbox controller 11, switches different gears through different logical combinations, and converts the original manual shifting into automatic shifting, which effectively reduces the driver's operation intensity and improves the driving experience.

[0051] Furthermore, the locking solenoid valve 13 is disposed on the gearbox 4 , and the locking solenoid valve 13 automatically locks based on the gear position by collecting the speed change detected by the gearbox output speed sensor 12 through the gearbox controller 11 .

[0052] Exemplarily, the locking control of the transmission 4 is achieved by the TCU transmission controller 11 collecting the current engine 1 speed, output speed and other operating parameters and then performing comprehensive calculations to achieve automatic locking of the transmission 4; considering the unnecessary low-speed locking, the locking function of the transmission 4 in low operating gears (e.g., 1-3 gears) is canceled through the CAN communication protocol.

[0053] Furthermore, the emergency running module 15 is electrically connected to the transmission controller 11 and the shift solenoid valve 14. When the emergency running module 15 detects a fault in the transmission controller 11 and the fault cannot be eliminated in a short time and there is a controller bus fault, the shift solenoid valve 14 can be controlled by the emergency running module 15 to switch to the 1st gear, so that the vehicle can be moved at a low speed to a safe point for subsequent inspection and maintenance.

[0054] Please continue reading Figure 3 In the present application, the gear shift of the gearbox 4 is controlled by the TCU gearbox controller 11 through the J1939 communication protocol, and the gearbox output speed sensor 12 detects the load change to realize automatic gear shifting. After the gear shift solenoid valve 14 located on the gearbox 4 receives the command of the TCU gearbox controller 11, different logic combinations of the gear shift solenoid valves 14 are used to realize automatic switching of different gears;

[0055] The gearbox 4 integrates the shift solenoid valve 14 and the locking solenoid valve 13, which reduces the difficulty of complex pipeline connection and whole machine layout, making the shift speed curve smooth, and the gearbox 4 and the torque converter 2 have a locking function, which establishes a rigid connection between the engine 1 and the gearbox 4, taking into account the vehicle's driving speed and traction working conditions. Automatic shifting can be achieved according to load changes, reducing the driver's operation intensity;

[0056] By monitoring the vehicle operation data through sensors, safety measures such as automatic shift controller downshift protection, torque converter 2 external oil temperature protection, and transmission 4 pressure protection are implemented, effectively extending the service life of the transmission system.

[0057] Reference Figure 1 The present invention also provides an embodiment of a pipeline system of an articulated mining truck transmission system, comprising: a transmission system lubrication pump 16, a torque converter cooler 17, a transmission oil filter 18 and a transmission pressure regulating valve 19.

[0058] The transmission system lubrication pump 16 is arranged on the torque converter 2 , the torque converter cooler 17 is arranged on the torque converter 2 , and the transmission pressure regulating valve 19 is arranged on the transmission 4 .

[0059] Furthermore, the transmission system lubrication pump 16 installed on the torque converter 2 is a double lubrication pump. The transmission system lubrication pump 16 includes a large displacement lubrication pump 161 and a small displacement lubrication pump 162. The large displacement lubrication pump 161 is used to pump out the transmission oil in the gearbox 4, while the small displacement lubrication pump 162 is used to pump out the transmission oil at the bottom of the torque converter 2.

[0060] Specifically, the large-displacement lubrication pump 161 is connected to the transmission oil filter 18, the locking solenoid valve 13 and the transmission pressure regulating valve 19 through pipelines to the transmission 4, while the small-displacement lubrication pump 162 is connected to the torque converter 2 and the transmission 4 through pipelines, and the torque converter cooler 17 is connected to the torque converter 2 and the transmission 4 through pipelines.

[0061] During high-speed driving, the transmission oil in the gearbox 4 is diverted through the large-displacement lubrication pump 161 and the transmission oil filter 18 into the locking solenoid valve 13 and the gearbox pressure regulating valve 19, and then enters the torque converter 2. The transmission oil in the torque converter 2 is pumped into the gearbox 4 through the small-displacement lubrication pump 162.

[0062] Illustratively, after the large-displacement lubrication pump 161 sucks oil from the gearbox 4, the pump outlet is diverted through the transmission oil filter 18 into the gearbox pressure regulating valve 19 and the locking solenoid valve 13; the gearbox 4 is integrated with the gearbox pressure regulating valve 19 for controlling the shifting pressure, so that the transmission oil flowing through the transmission oil filter 18 is controlled by the transmission pressure regulating valve 19 and then supplied to the gearbox 4 clutch to realize hydraulic shifting of gears; in addition, the oil inlet of the locking solenoid valve 13 also comes from the filter, and cannot reach the locking clutch in the non-locked state. The locking clutch can only work when the locking valve is energized.

[0063] Specifically, when the bypass oil path of the pressure regulating valve of the torque converter 2 reaches the gearbox 4 through the transmission oil cooler, the heat dissipation power of the cooler needs to meet more than 35% of the rated power of the engine 1, thereby ensuring that the torque converter 2 works at a suitable temperature.

[0064] Illustratively, the small-displacement lubrication pump 162 is used for the forced gravity oil return of the transmission system, which can pump the oil at the bottom of the torque converter 2 back to the oil pan of the gearbox 4, effectively solving the problem that the circulating oil in the transmission oil circuit cannot return to the oil pan of the gearbox 4 in time, causing the main lubrication pump to be sucked empty, and the problem that too much oil is stored in the torque converter 2 and the internal pressure increases, causing oil leakage from the breather.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An articulated mining truck transmission system, characterized in that: include: An engine (1) and a gearbox (4), wherein an output end of the engine (1) is drivingly connected to a torque converter (2); One end of the gearbox (4) is drivingly connected to the torque converter (2) via a transmission shaft (5), and the other end of the gearbox (4) is drivingly connected to a drive axle via a transmission shaft (5), wherein the drive axle comprises a front drive axle (3) and a rear drive axle (7); A retarder (6) is connected between the gearbox (4) and the drive axle via a transmission shaft (5).

2. The articulated mining truck transmission system according to claim 1, characterized in that: Also includes: A torque converter oil temperature sensor (8), a transmission pressure sensor (9), a fault diagnosis display (10), a transmission controller (11), a transmission output speed sensor (12), a locking solenoid valve (13), a shift solenoid valve (14) and an emergency travel module (15), wherein the transmission controller (11) is electrically connected to the torque converter oil temperature sensor (8), the transmission pressure sensor (9), the fault diagnosis display (10), the transmission output speed sensor (12), the locking solenoid valve (13) and the shift solenoid valve (14).

3. The articulated mining truck transmission system according to claim 2, characterized in that: The transmission pressure sensor (9) is arranged on the transmission (4), the torque converter oil temperature sensor (8) is arranged on the torque converter (2), and when the pressure of the transmission (4) is lower than a set value or the oil temperature of the torque converter (2) is higher than a set value, the transmission controller (11) controls the transmission (4) to enter a neutral protection state.

4. The articulated mining truck transmission system according to claim 2, characterized in that: The gearbox controller (11) is arranged on the gearbox (4), and the gearbox controller (11) detects load changes through the gearbox output speed sensor (12) to adapt to the working condition and perform automatic gear shifting; The shift solenoid valve (14) receives a shift signal from the transmission controller (11) and switches to different gears through different logical combinations.

5. The articulated mining truck transmission system according to claim 2, characterized in that: The locking solenoid valve (13) is arranged on the gearbox (4), and the locking solenoid valve (13) automatically locks based on the gear position by collecting the speed change detected by the gearbox output speed sensor (12) through the gearbox controller (11).

6. The articulated mining truck transmission system according to claim 2, characterized in that: The emergency running module (15), the transmission controller (11) and the shift solenoid valve (14) are electrically connected, and after the emergency running module (15) detects a fault in the transmission controller (11), the emergency running module (15) controls the shift solenoid valve (14) to switch to first gear.

7. The pipeline system of the articulated mining truck transmission system according to any one of claims 1 to 6, characterized in that: include: Transmission system lubrication pump (16), torque converter cooler (17), transmission oil filter (18) and transmission pressure regulating valve (19); The transmission system lubrication pump (16) is arranged on the torque converter (2), the torque converter cooler (17) is arranged on the torque converter (2), and the transmission pressure regulating valve (19) is arranged on the transmission (4).

8. The pipeline system of the articulated mining truck transmission system according to claim 7, characterized in that: The transmission system lubrication pump (16) comprises a large-displacement lubrication pump (161) and a small-displacement lubrication pump (162), wherein the large-displacement lubrication pump (161) is used to pump out the transmission oil in the gearbox (4), and the small-displacement lubrication pump (162) is used to pump out the transmission oil at the bottom of the torque converter (2).

9. The pipeline system of the articulated mining truck transmission system according to claim 8, characterized in that: The large-displacement lubrication pump (161) is connected to the transmission oil filter (18), the locking solenoid valve (13) and the transmission pressure regulating valve (19) through pipelines to the transmission (4); the small-displacement lubrication pump (162) is connected to the torque converter (2) and the transmission (4) through pipelines; and the torque converter cooler (17) is connected to the torque converter (2) and the transmission (4) through pipelines.

10. The pipeline system of the articulated mining truck transmission system according to claim 8, characterized in that: The transmission oil in the gearbox (4) is diverted through the large-displacement lubrication pump (161) through the transmission oil filter (18) into the locking solenoid valve (13) and the gearbox pressure regulating valve (19) and then enters the torque converter (2). The transmission oil in the torque converter (2) is pumped into the gearbox (4) through the small-displacement lubrication pump (162).

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