New energy working machine

Abstract

A new energy working machine, comprising an assembly chassis. The assembly chassis comprises a front suspension device, a powertrain, an electric drive system, and a rear working device that are sequentially connected from front to rear along the vehicle length of the new energy working machine. The electric drive system comprises a range‑extender generator, a front PTO drive motor, a two-in-one drive motor, and an oil pump motor. The two-in-one drive motor comprises a rear PTO drive motor and a traveling drive motor that are coaxially connected in series. The front PTO drive motor, the oil pump motor, the rear PTO drive motor, and the traveling drive motor are sequentially arranged above a frame of the powertrain from front to rear along the vehicle length. By replacing mechanical drive in the prior art with direct drive via the front PTO drive motor, the oil pump motor, and the rear PTO drive motor, the present application can achieve continuously variable transmission, and can also fully utilize fragmented installation spaces within the new energy working machine, without being constrained by the structure of an engine or a transmission. Thus, the new energy working machine facilitates cab installation while meeting the minimum wheel track requirement for the entire machine.

Description

New energy working machine

[0001] Cross-reference to related applications

[0002] This application claims the benefit of Chinese Patent Application No. 202411062061.0, filed August 5, 2024, the contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application belongs to the technical field of vehicle power device arrangement, and particularly relates to a new energy working machine. BACKGROUND

[0004] With the continuous increase of land transfer, land consolidation and soil hardening, the market demand for new energy working machines, such as large horsepower tractors, is rising. At present, the transmission system of large horsepower tractors mainly adopts power shift technology, and the chassis and overall system structure are complex, which requires very high technical ability for design, manufacturing and maintenance, and the cost is also very high.

[0005] Because the hybrid tractor for heavy load operation above 300 horsepower has a great difference in overall structure from the traditional diesel tractor, the structure arrangement methods of the two are not possible to be copied. In the face of the emerging thing of hybrid tractor for heavy load operation above 300 horsepower, the technical personnel in this industry often do not have targeted structure arrangement experience, and a series of problems caused by unreasonable arrangement may occur, which cannot meet the installation requirements of the overall minimum wheel pitch and the cab.

[0006] Because of the complexity of agricultural production, the tractor has multiple working conditions including transportation, rotary tillage and plowing, etc. These working conditions have great differences in the selection of speed and torque. The power shift scheme will inevitably make the tractor have low efficiency when the demand torque is large or small, have gear shifting jerk, and have low driving comfort. In addition, the motor mechanical valve processing and control algorithm are difficult to implement, and the effective balance of demand power and load power cannot be achieved, which reduces the efficiency of the tractor and increases the cost of agricultural production. The working speed point of the engine is difficult to be always in the best area due to the change of the load of the machine operation, which reduces the efficiency of agricultural production and increases the cost of agricultural production.

[0007] SUMMARY

[0008] The main purpose of the present application is to provide a new energy working machine, which aims to solve the technical problem that the new energy working machine in the prior art cannot meet the installation requirements of the overall minimum wheel pitch and the cab.

[0009] In order to achieve the above-mentioned purpose, the new energy working machine provided by the present application comprises: an assembly chassis, comprising a front suspension device, a power system, an electric drive system and a rear working device connected in sequence from front to rear along the length direction of the new energy working machine, the front suspension device and the rear working device are used for respectively corresponding to the front working implement and the rear working implement, the electric drive system comprises a range extender, a front PTO drive motor, a two-in-one drive motor and an oil pump motor, the range extender is used for converting the mechanical energy transmitted by the engine of the power system into electrical energy, and transmitting the electrical energy to the front PTO motor, the two-in-one drive motor and the oil pump motor, the two-in-one drive motor comprises a rear PTO drive motor and a walking drive motor connected coaxially in series, the front PTO drive motor, the oil pump motor, the rear PTO drive motor and the walking drive motor are sequentially arranged above the rack of the power system from front to rear along the length direction of the vehicle; a front PTO assembly is arranged at the front end of the front PTO drive motor along the length direction of the vehicle, the front PTO drive motor is used for driving the front working implement to rotate through the front PTO assembly; a rear PTO assembly, the rear PTO drive motor is used for driving the rear working implement to rotate through the rear PTO assembly; a hydraulic system, the oil pump motor drives the hydraulic system through a variable pump, and the hydraulic system is used for converting mechanical energy into hydraulic energy and controlling the rear working device and the front suspension device to act.

[0010] Through the above technical solution, the new energy working machine provided by the present application has the following beneficial effects:

[0011] Through the direct driving mode of the front PTO drive motor, the oil pump motor and the rear PTO drive motor, the stepless speed change is realized, the scattered installation space in the new energy working machine can be fully utilized, the structure of the engine or the transmission is not limited, in addition, the two motors of the two-in-one drive motor are coaxially connected in series along the length direction of the vehicle, the space occupied by the motors in the width direction of the vehicle can be avoided, the structural compactness of the new energy working machine is improved, the new energy working machine can meet the minimum wheelbase requirement of the whole machine and the installation of the cab is facilitated.

[0012] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0013] The accompanying drawings are used to provide an understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0014] Fig. 1 is a schematic structural diagram of the whole machine of the new energy working machine in one view according to the present application;

[0015] Fig. 2 is a schematic diagram of the overall structure of a new energy working machine according to the present application from another perspective;

[0016] Fig. 3 is a schematic diagram of the power system structure of a new energy working machine according to the present application;

[0017] Fig. 4 is a schematic diagram of the electric drive system structure of a new energy working machine according to the present application;

[0018] Fig. 5 is a schematic diagram of the transmission system structure of a new energy working machine according to the present application;

[0019] Fig. 6 is a schematic diagram of the running system structure of a new energy working machine according to the present application;

[0020] Fig. 7 is a schematic diagram of the cover assembly structure of a new energy working machine according to the present application;

[0021] Fig. 8 is a schematic diagram of the steering system structure of a new energy working machine according to the present application;

[0022] Fig. 9 is a schematic diagram of the hydraulic system structure of a new energy working machine according to the present application;

[0023] Fig. 10 is a schematic diagram of the rear working device structure of a new energy working machine according to the present application;

[0024] Fig. 11 is a schematic diagram of the front suspension device structure of a new energy working machine according to the present application.

[0025] B, electric drive system; C, transmission system; D, travel system; E, covering assembly; F, steering system; G, hydraulic system; H, rear working device; I, front suspension device; 1, engine; 2, aftertreatment device; 3, radiator; 4, first expansion tank; 5, intercooler; 6, radiator fan; 7, air filter assembly; 8, fuel tank; 9, urea tank; 10, range extender generator; 11, motor controller; 12, two-in-one drive motor; 13, oil pump motor; 14, high-voltage wire harness; 15, PCU controller; 16, high-voltage distribution box; 17, electronic water pump; 18, cooling water tank; 19, water pump inlet pipe; 20, water tank inlet pipe; 21, DCDC power supply; 22, power battery; 23, PTC heater; 24, water cooling unit; 25, gearbox; 26, brake assembly; 27, lubricating oil radiator; 28, front transmission shaft assembly; 29, machine frame; 30, rear axle assembly; 31, front counterweight; 32, water tank bracket; 33, front drive axle; 34, front drive wheel; 35, rear drive wheel; 36, rear counterweight; 37, column mounting bracket; 38, steering column; 39, steering wheel; 40, hydraulic steering gear; 41, steering gear inlet oil pipe; 42, steering gear left outlet oil pipe; 43, steering gear right outlet oil pipe; 44, steering gear return oil pipe; 45, front hood; 46, right hood of hood; 47, left hood of hood; 48, cab; 49, interior layer; 50, instrument cover; 51, console; 52, seat; 53, vehicle ladder; 54, suspension; 55, air conditioning and heating system; 56, hydraulic oil tank; 57, variable pump; 58, priority valve inlet oil pipe; 59, priority valve assembly; 60, priority valve outlet oil pipe; 61, oil return pipe welding; 62, high-pressure oil filter; 63, oil return filter; 64, electric control multi-way valve inlet oil pipe; 65, electric control multi-way valve assembly; 66, electric control multi-way valve return oil pipe; 67, rear lifting oil cylinder inlet oil pipe; 68, rear lifting oil cylinder return oil pipe; 69, hydraulic oil heat absorption oil pipe; 70, gear pump assembly; 71, gear pump outlet oil pipe; 72, hydraulic oil radiator; 73, radiator return oil pipe; 74, left limit rod; 75, left rear pull rod; 76, traction seat; 77, left rear lifting oil cylinder; 78, upper pull rod support; 79, left rear lifting rod; 80, right rear lifting rod; 81, right rear lifting oil cylinder; 82, upper rear pull rod; 83, right limit rod; 84, right rear pull rod; 85, traction frame; 86, front traction rod; 87, rear traction rod; 88, first connecting pin; 89, locking pin shaft; 90, second connecting pin; 91, front suspension support; 92, left front pull rod; 93, left front lifting oil cylinder; 94, right front lifting oil cylinder; 95, right front pull rod; 96, right front lifting oil cylinder oil pipe; 97, left front lifting oil cylinder oil pipe; 98, upper front pull rod; 99, second expansion tank; 100, front PTO drive motor; 101, front PTO assembly. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory in nature and are not intended to limit the application.

[0027] A new energy working machine according to the present application is described below with reference to the accompanying drawings.

[0028] The new energy working machine as shown in FIGS. 1-11 includes an assembled chassis, a front PTO assembly 101 and a hydraulic system G, the assembled chassis includes a front hanger I, a power system A, an electric drive system B and a rear working device H connected in sequence from front to rear along the length direction of the new energy working machine, the front hanger I and the rear working device H are used to respectively correspond to the front working implement and the rear working implement, the electric drive system B includes a range extending generator 10, a front PTO drive motor 100, a two-in-one drive motor 12 and an oil pump motor 13, the range extending generator 10 is used to convert the mechanical energy transmitted by the engine 1 of the power system A into electrical energy, and transmit the electrical energy to the front PTO drive motor 100, the two-in-one drive motor 12 and the oil pump motor 13, the two-in-one drive motor 12 includes a rear PTO drive motor and a walking drive motor connected coaxially in series, the front PTO drive motor 100, the oil pump motor 13, the rear PTO drive motor and the walking drive motor are sequentially arranged from front to rear above the frame 29 of the power system A along the length direction of the vehicle; the front PTO assembly 101 is arranged at the front end of the front PTO drive motor 100 along the length direction of the vehicle, the front PTO drive motor 100 is used to drive the front working implement to rotate through the front PTO assembly 101; a rear PTO assembly, the rear PTO drive motor is used to drive the rear working implement to rotate through the rear PTO assembly; the oil pump motor 13 drives the hydraulic system G through the variable pump 57, the hydraulic system G is used to convert mechanical energy into hydraulic energy and control the action of the rear working device H and the front hanger I. The front PTO assembly 101 can be a small gearbox or a power take-off.

[0029] Compared with the parallel driving mode of the two-in-one motor in the prior art, the two-in-one driving motor 12 in the application adopts the connection form of coaxial series connection of the rear PTO driving motor and the traveling driving motor in the vehicle length direction, which can avoid occupying the wheel track. In addition, the oil pump motor 13 directly drives the hydraulic system G through the variable pump 57, which can replace the mechanical driving of the gearbox or the engine in the prior art. The oil pump motor 13 can be connected with the power source through a wire harness, the oil pump motor 13 and the variable pump 57 can be connected through a spline, and the variable pump 57 and the hydraulic system G can be connected through an oil pipe. Through the connection mode of the wire harness and the oil pipe, the arrangement of the oil pump motor 13 and the variable pump 57 is more flexible, which avoids being restricted by the structure of the gearbox or the engine, fully utilizes the small idle space, makes the structure of the new energy working machine more compact, realizes miniaturization, and the front PTO driving motor 100 and the rear PTO driving motor adopt the direct motor driving mode, which avoids the mechanical driving in the prior art. Through the wire harness connection, power transmission can be realized, the flexible installation of the front PTO driving motor 100 and the rear PTO driving motor can be facilitated, and the influence on the wheel track can be avoided. The front PTO driving motor 100, the oil pump motor 13, the rear PTO driving motor and the traveling driving motor are sequentially arranged from front to rear on the upper side of the rack 29 of the power system A in the vehicle length direction, so that the high-voltage components are arranged on the upper side of the rack 29, which can avoid the splashing of mud to the high-voltage components, so that the high-voltage components will not be leaked due to water contact, and the use safety of the new energy working machine is higher.

[0030] The direct driving mode of the front PTO driving motor 100, the oil pump motor 13 and the rear PTO driving motor in the embodiment replaces the mechanical driving in the prior art, which can realize stepless speed change, fully utilize the scattered installation space in the new energy working machine, is not restricted by the structure of the engine or the gearbox, and in addition, the two motors of the two-in-one driving motor 12 are coaxially connected in series in the vehicle length direction, which can also avoid the space occupation of the motors in the vehicle width direction, improves the structural compactness of the new energy working machine, and enables the new energy working machine to meet the minimum wheel track requirement of the whole machine while facilitating the installation of the cab.

[0031] In an embodiment, the new energy working machine includes an assembly chassis, a cover assembly E, a steering system F, a walking system D and a hydraulic system G. The assembly chassis includes a front suspension device I, a power system A, an electric drive system B, a transmission system C and a rear working device H connected in sequence from front to rear along the length direction of the new energy working machine. The front suspension device I and the rear working device H are used for docking working implements. The electric drive system B includes a range-extending generator 10, a power battery 22, a two-in-one drive motor 12 and an oil pump motor 13. The range-extending generator 10 is used for converting mechanical energy transmitted by an engine 1 of the power system A into electric energy and transmitting the electric energy to the power battery 22. The power battery 22 is used for transmitting power to the transmission system C through the two-in-one drive motor 12. The two-in-one drive motor 12 can convert electric energy into mechanical energy. The two-in-one drive motor 12 is integrated with a rear PTO drive motor and a walking drive motor. The cover assembly E is installed above the assembly chassis for protecting the power system A. The cover assembly E is provided with a cab 48 for protecting a driver. The walking system D is connected to both sides of the assembly chassis in the width direction of the vehicle through the power system A. The walking system D is used for driving the new energy working machine to travel. The front drive axle 33 of the walking system D and the steering system F are connected through a steering oil pipe and are used for steering. The steering system F and the hydraulic system G are respectively installed on the front and rear sides of the assembly chassis. The oil pump motor 13 is used for transmitting power to the hydraulic system G. The hydraulic system G is used for converting mechanical energy into hydraulic energy and controlling the steering system F, the rear working device H and the front suspension device I to act. A controller is configured to:

[0032] determine that the new energy working machine is in a heavy load working mode, control the walking drive motor and the rear PTO drive motor in the two-in-one drive motor 12 to be coupled and driven, so that the walking drive motor and the rear PTO drive motor simultaneously provide power to the walking system D;

[0033] determine that the new energy working machine is in a light load working mode, control the walking drive motor and the rear PTO drive motor to be independently driven, so that the walking drive motor alone provides power to the transmission system C.

[0034] The range-extending generator 10 can output power to the front PTO drive motor 100, the oil pump motor 13, the rear PTO drive motor and the walking drive motor through the power battery 22, or directly output power to the front PTO drive motor 100, the oil pump motor 13, the rear PTO drive motor and the walking drive motor.

[0035] The walking driving motor and the rear PTO driving motor can be installed in different housings and connected in series, or the walking driving motor and the rear PTO driving motor can be integrated in the same housing and connected in series, so that the space occupation of the motors on the whole vehicle can be reduced, and the rear PTO driving motor is mainly used for outputting power to the rear PTO assembly. The rear PTO assembly is a power output device of the new energy working machine, and can be a power take-off device. The rear PTO assembly can drive the rear working device to rotate.

[0036] In an embodiment, the new energy working machine is mainly used for a large-horsepower electric tractor, and in other embodiments, the new energy working machine can be used for other engineering machinery. The engine can adopt a national IV engine.

[0037] The front suspension device I, the power system A, the electric drive system B, the transmission system C and the rear working device H in the embodiment are connected in sequence from front to rear along the length direction of the vehicle, and are connected through the left and right ends of the frame 29 and the rear axle assembly 30 in the transmission system C to jointly form an assembled chassis of the tractor; the steering system F and the hydraulic system G are installed in sequence from front to rear on both sides of the assembled chassis of the tractor; and the covering assembly E is installed above the chassis assembly of the whole tractor. The arrangement is reasonable, and can meet the installation requirements of the minimum wheel track of the whole machine and the cab.

[0038] Specifically, the electric drive system B converts the mechanical energy from the power system A into electric energy, and further converts the electric energy into mechanical energy of the driving motor to transmit to the transmission system C; the transmission system C transmits the power from the electric drive system B to the walking system D, the steering system F and the hydraulic system G; the walking system D is driven to travel, the steering system F is driven to turn, and the hydraulic system G converts the mechanical energy transmitted by the electric drive system B into hydraulic energy to control the rear working device H and the front suspension device I to lift and lower the working implements; the covering assembly E provides a protection function for the power system A, and provides safety protection and rain and sun protection for the tractor driver.

[0039] The rear end of the engine 1 of the power system A and the front end of the range-extending generator 10 in the electric drive system B are connected by bolts; the engine 1, the fuel tank 8 and the rear processor 2 of the power system A and the range-extending generator 10, the motor controller 11 and the two-in-one driving motor 12 in the electric drive system B are respectively installed and fixed on the left and right sides of the frame 29 in the transmission system C through supports; the rear end surface of the water tank bracket 32 in the walking system D is fixed on the front end surface of the front axle bracket in the frame 29 in the transmission system C by bolts, and the rear driving wheels 35 in the walking system D are fixed and installed on the left and right ends of the rear axle assembly 30 in the transmission system C by bolts.

[0040] The cover assembly E is fixedly installed on both sides of the frame 29 and the rear axle assembly 30 in the transmission system C through the support on the suspension 54. The hydraulic steering gear 40 on the steering system F is fixedly installed in the instrument cover 50 in the cover assembly E, and is connected with the oil outlet of the priority valve in the hydraulic system G and the left and right steering oil cylinder oil ports of the front drive axle 33 through the oil pipes respectively. The variable pump 57 in the hydraulic system G is installed on the frame 29 in the transmission system C. The electric control multi-way valve assembly 65 is installed on the upper end face of the rear part of the rear axle assembly 30 in the transmission system C through the support. The left rear pull rod 75, the traction seat 76, the left rear lifting oil cylinder 77, the upper pull rod support 78, the right rear lifting oil cylinder 81 and the traction frame 85 of the rear working device H are fixedly installed on the rear end face and the left and right side faces of the rear axle assembly 30 in the transmission system C through the pin shaft and the bolt respectively. The front suspension device I is fixedly installed on the front end face of the water tank bracket 32 in the walking system D through the bolt.

[0041] The driving mode of the new energy working machine in the embodiment is the range extending mode. The engine 1 charges the power battery 22 of the range extending generator 10, so that the engine 1 does not need to operate at full load under the load working conditions such as plowing and rotary plowing, but works in the working interval with the optimal fuel consumption and emission to charge the power battery 22 to store energy, thereby achieving the purpose of energy saving and emission reduction, greatly improving the economy of the new energy working machine. Meanwhile, the front and rear axles and the PTO are driven by the dual-drive motor modular driving motor, and compared with the dual-motor parallel hybrid, the structure is more compact, and the reasonable arrangement of other structures is not affected. Compared with the traditional tractor mechanical transmission, the new energy working machine also has the advantages of stepless speed change and precise control, greatly improving the operation comfort and power, and having great advantages in noise control of the new energy working machine.

[0042] When the new energy working machine is working under heavy load, the dual-drive motor coupling driving mode is enabled, that is, the walking driving motor and the rear PTO driving motor in the two-in-one driving motor 12 are used as driving motors. The power of the walking driving motor and the rear PTO driving motor in the two-in-one driving motor 12 is coupled and output through the parallel shaft type gear transmission. Through the reasonable transmission ratio, the working speed is in the low-speed constant torque section of the motor, stepless speed change is realized, walking slip is reduced, the impact and jerk of power shifting are avoided when the load changes, torque transmission is smooth, and the traction efficiency and driving comfort are improved. Compared with the existing single motor scheme, the torque matching of the walking driving motor and the rear PTO driving motor in the two-in-one driving motor 12 can improve the range of the high efficiency zone of the motor, thereby improving the efficiency of the new energy working machine. When the mode is converted and the gear is changed, uninterrupted power shifting is realized, the vehicle speed gear is quickly changed, the working efficiency is improved, uninterrupted power shifting is realized, the technical bottleneck of high cost and complex design structure caused by the wet clutch and the electric proportional valve in the conventional structure is broken through, the constant torque output of the motor improves the shifting smoothness, and the jerk caused by the wet clutch shifting is avoided.

[0043] Specifically, in an embodiment, the controller determines that the new energy working machine is in a light load rotary tillage operation mode, and enables a double-drive motor independent driving mode, that is, the walking driving motor in the two-in-one driving motor 12 is used for tractor walking, and the rear PTO driving motor is used for PTO assembly rotation, and the rear PTO driving motor can realize stepless speed change of power output, especially in matching large inertia tools such as baling machines and composite tools, the motor realizes flexible combination, avoiding load impact on the transmission system and the tool during startup. The walking driving motor can also realize stepless speed change of power output, and the walking driving motor and the rear PTO driving motor are not limited to series arrangement, but also include two-in-one integrated arrangement of the two motors, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the application fall within the protection scope of the application.

[0044] In another embodiment, the new energy working machine further comprises a front PTO driving motor, and the range-extending generator 10 can transmit power to the front PTO driving motor through the power battery 22. The front PTO driving motor and the two-in-one driving motor and the oil pump motor are independent of each other. The front PTO driving motor is used to drive the rotary operation of the working tool connected to the front suspension device I, and the rear PTO driving motor is used to drive the rotary operation of the working tool connected to the rear working device H.

[0045] In this embodiment, by optimizing the layout of the assembled chassis, the cover assembly E, the steering system F, the walking system D and the hydraulic system G, a series of problems caused by unreasonable layout can be avoided, and the installation requirements of the minimum wheel pitch and the cab of the whole machine can be met. At the same time, the two-in-one driving motor 12, the oil pump motor 13 and the transmission system C, the hydraulic system G and the walking system D are matched with each other, the power transmission can be switched according to different working conditions, the wet clutch and other shifting components are omitted, stepless speed change is realized, production efficiency is improved, production cost is reduced, and user's use comfort is improved.

[0046] Specifically, as shown in FIG. 3, the power system A further comprises a postprocessor 2, a radiator water tank 3, a first expansion water tank 4, an intercooler 5, a radiator fan 6, an air filter assembly 7, a fuel tank 8 and a urea tank 9. The postprocessor 2 is installed on the frame 29 of the transmission system C and connected to the exhaust pipe of the engine 1, and is used to reduce the exhaust emission and noise of the engine 1. The radiator water tank 3 is connected to the engine 1 through a water pipe, and is used to cool the engine 1 through cooling liquid circulation. The first expansion water tank 4 is installed above the engine 1 and is used to supplement the cooling liquid for the radiator water tank 3 and the engine 1. The intercooler 5 and the radiator water tank 3 are both installed on the water tank bracket 32 of the running system D, and the intercooler 5 is connected to the air port of the engine 1 through an air pipe. The radiator fan 6 is installed on the fan shaft of the engine 1, and is used to provide low-temperature air for the engine 1 together with the intercooler 5. The air filter assembly 7 is installed above the engine 1 and is used to provide clean air for the engine 1. The fuel tank 8 is installed on the two sides of the frame 29 along the vehicle width direction opposite to the postprocessor 2, and is used to store fuel. The urea tank 9 is used to provide urea for the postprocessor 2 and is installed below the postprocessor 2.

[0047] In the embodiment, the rear end of the engine 1 is connected to the range extender 10 in the electric drive system B through bolts, and the engine 1 and the range extender 10 are installed on the frame 29 in the transmission system C through a support. The radiator fan 6 is installed on the fan shaft of the engine 1 through bolts. The radiator water tank 3 and the intercooler 5 are sequentially installed on the water tank bracket 32 in the running system through bolts. The first expansion water tank 4 is installed above the engine 1 through a support. The radiator water tank 3 is connected to the inlet and outlet ports of the engine 1 through inlet and outlet water pipes. The intercooler 5 assembly is connected to the inlet and outlet ports of the engine 1 through inlet and outlet air pipes. The air filter assembly 7 is fixed on the upper part of the range extender 10 through a support and is connected to the supercharger air inlet port of the engine 1 through an air outlet pipe. The fuel tank 8 for supplying oil to the engine 1 is installed on the left side of the frame 29 assembly in the transmission system C through a support. The postprocessor 2 is fixed on the right side of the frame 29 assembly in the transmission system C through a support. The urea tank for providing urea for the postprocessor 2 is fixed on the lower part of the postprocessor 2 through a support. The engine 1 provides a power source for the whole machine. The power is transmitted to the variable pump 57 in the transmission system C and the hydraulic system G through the electric drive system B. The transmission system C transmits the power to the power output shaft and the running system D for driving running. The air filter assembly 7 provides clean air for the engine 1 and effectively filters impurities in the air. The radiator water tank 3 and the radiator fan 6 cool the engine 1 through cooling liquid circulation. The intercooler 5 and the radiator fan 6 provide low-temperature air for the engine 1 through cooling air, reduce the thermal load and increase the air intake. The postprocessor 2 can reduce the exhaust emission and noise of the engine 1. The fuel tank 8 stores diesel fuel required by the engine 1. The urea tank provides urea for the postprocessor 2. The first expansion water tank 4 supplements the cooling liquid for the radiator water tank 3.

[0048] In an embodiment, as shown in FIG. 4, the electric drive system B further comprises a motor controller 11, a high-voltage distribution box 16, a cooling water tank 18, an electronic water pump 17, a water cooling unit 24, a PTC heater 23 and a second expansion water tank 99; the motor controller 11 is used to control the two-in-one drive motor 12 and the oil pump motor 13; the high-voltage distribution box 16 is installed at the rear of the cab 48 and is connected with the motor controller 11 through a high-voltage wire harness, and the high-voltage distribution box 16 is used to distribute electric current; the cooling water tank 18 is installed in front of the heat dissipation water tank 3, and the cooling water tank 18 is connected with the motor controller 11, the oil pump motor 13, the two-in-one drive motor 12 and the range-extending generator 10 through a water tank inlet pipe 20; the electronic water pump 17 is used to pump the coolant in the water tank inlet pipe 20 into the motor controller 11, the oil pump motor 13, the two-in-one drive motor 12 and the range-extending generator 10; the water cooling unit 24 is installed on the frame 29; the water cooling unit 24 and the PTC heater 23 are used to regulate the temperature of the power battery 22; the second expansion water tank 99 is installed above the engine 1, and the second expansion water tank 99 is connected with the water cooling unit 24 and the power battery 22 through a water pipe; wherein, the range-extending generator 10, the oil pump motor 13, the motor controller 11 and the two-in-one drive motor 12 are sequentially installed on the frame 29.

[0049] The range-extending generator 10, the oil pump motor 13, the motor controller 11, and the two-in-one drive motor 12 in this embodiment are sequentially bolted to the frame 29 in the transmission system C; the range-extending generator 10 converts the mechanical energy transmitted from the engine 1 into electrical energy, and simultaneously transmits the electrical energy to the power battery 22 through the high-voltage wire harness 14, and the power battery 22 transmits the electrical energy to the two-in-one drive motor 12 and the oil pump motor 13; the two-in-one drive motor 12 converts the electrical energy into mechanical energy and transmits it to the gearbox 25 and the PTO assembly in the transmission system C; the oil pump motor 13 converts the electrical energy into mechanical energy and transmits it to the variable pump 57 in the hydraulic system G; the high-voltage distribution box 16 is bolted to the rear of the cab in the cover assembly E, and is connected with the motor controller 11 through the high-voltage wire harness 14, and can distribute the current according to the system requirements; the cooling water tank 18 is fixed to the front of the radiator 3 by a bracket, one end of the electronic water pump 17 is connected with the water pump inlet pipe 19, and the other end is connected with the water inlets of the oil pump motor 13, the two-in-one drive motor 12, and the range-extending generator 10, the water pump inlet pipe 19 is located at the lower end of the cooling water tank 18, the water tank inlet pipe 20 is located at the upper end of the cooling water tank 18, and the cooling water can be returned to the cooling water tank 18; the cooling water tank 18 is connected with the water outlet of the motor controller 11 through the water tank inlet pipe 20; each motor corresponds to one motor controller 11 and one electronic water pump 17, the water outlets of the four motor controllers 11 are respectively connected with the water inlets of the oil pump motor 13, the two-in-one drive motor 12, the range-extending generator 10, and the front PTO drive motor 100; the temperature in the motor controller 11 and the two-in-one drive motor 12, the oil pump motor 13, and the front PTO drive motor 100 is reduced through the cooling liquid circulation.

[0050] The power battery 22 is fixed above the gearbox 25 and the frame 29 in the transmission system C through a support; the water cooling unit 24 is fixed to the right side of the frame 29 in the transmission system C through a support; the second expansion water tank 99 is fixed above the engine 1 through a support; the second expansion water tank 99 is connected with the water cooling unit 24 and the power battery 22 through water pipes; the PTC heater 23 assembly is connected with the power battery 22; through the heating function of the water cooling unit 24 and the PTC heater 23, the temperature in the power battery 22 is controlled; the DCDC power supply 21 converts high-voltage electricity into low-voltage electricity to provide stable current output for the whole machine; the electric drive system B utilizes the characteristics of the range extender 10 and the power battery 22, in combination with the high-efficiency working area of the engine 1, to achieve peak clipping and valley filling, oil saving and noise reduction; the battery thermal management system is equipped to achieve thermal balance and energy management in cold and high-temperature weather; the two-in-one drive motor 12 is adopted, through reasonable transmission ratio, to make part of the working speed in the low-speed constant torque section of the drive motor, realize stepless speed change, smooth torque transmission, and improve traction efficiency and driving comfort. At the same time, the rear PTO drive motor in the two-in-one drive motor 12 can realize stepless speed change of power output speed, the motor realizes flexible combination, and avoids load impact on the transmission system and implements during starting.

[0051] In the embodiment of the present application, as shown in FIG. 9, the hydraulic system G includes a hydraulic oil tank 56, a priority valve assembly 59, an electric control multi-way valve assembly 65, a variable pump 57, a high-pressure oil filter 62, an oil return filter 63, a gear pump assembly 70 and a hydraulic oil radiator 72; the hydraulic oil tank 56 is installed on the frame 29 and is used to store hydraulic oil; the priority valve assembly 59; the electric control multi-way valve assembly 65 is connected with the oil return port of the hydraulic oil tank 56; the variable pump 57 is installed on the frame 29, and the oil pump motor 13 is used to provide power to the variable pump 57; one end of the variable pump 57 is connected with the oil outlet of the hydraulic oil tank 56, and the other end is connected with the priority valve assembly 59; the high-pressure oil filter 62 is connected with the priority valve assembly 59 at one end and connected with the electric control multi-way valve assembly 65 at the other end; the oil return filter 63 is integrated in the hydraulic oil tank 56; the hydraulic oil radiator 72 is connected with the gear pump assembly 70 at one end and connected with the oil return port of the hydraulic oil tank 56 at the other end.

[0052] The hydraulic oil tank 56 is fixed on the right side of the frame 29 in the transmission system by a support in this embodiment; the variable pump 57 is fixed on the right side of the frame 29 by bolts and is powered by the oil pump motor 13 in the electric drive system B, one end of the variable pump 57 is connected with the oil outlet of the hydraulic oil tank 56, and the other end is connected with the priority valve assembly 59 through the priority valve oil inlet pipe 58; one end of the high-pressure oil filter 62 is connected with the priority valve assembly 59 through the priority valve oil outlet pipe 60, and the other end is connected with the electric control multi-way valve assembly 65 through the electric control multi-way valve oil inlet pipe 64; one end of the oil return pipe 61 is connected with the oil return block, and the other end is connected with the oil return port of the hydraulic oil tank 56; one end of the electric control multi-way valve oil return pipe 66 is connected with the oil return port of the electric control multi-way valve assembly 65, and the other end is connected with the oil return port of the hydraulic oil tank 56; one end of the radiator oil return pipe 73 is connected with the oil outlet of the hydraulic oil tank 56, and the other end is connected with the oil inlet of the gear pump assembly 70; one end of the gear pump oil outlet pipe 71 is connected with the oil outlet of the gear pump assembly 70, and the other end is connected with the oil inlet of the hydraulic oil radiator 72; one end of the radiator oil return pipe 73 is connected with the oil outlet of the hydraulic oil radiator 72, and the other end is connected with the oil return port of the hydraulic oil tank 56; the oil return filter 63 is integrated inside the hydraulic oil tank 56; the hydraulic system G converts the power transmitted by the oil pump motor 13 into hydraulic system pressure by means of the variable pump 57; the hydraulic oil radiator 72 cools the hydraulic system G by circulating hydraulic oil; the high-pressure oil filter 62 and the oil return filter 63 can ensure the cleanliness of the hydraulic oil; the hydraulic oil tank 56 reserves the hydraulic oil required for the work of the hydraulic system G; the electric control multi-way valve assembly 65 can control the hydraulic oil flow of the entire hydraulic system, realize the action and hydraulic output function of the rear work device H assembly and the front suspension device I.

[0053] As shown in Fig. 8, the steering system F comprises a column mounting bracket 37, a steering column 38, a steering wheel 39 and a hydraulic steering gear 40, the column mounting bracket 37 is mounted in the cab 48; the steering column 38 is mounted on the column mounting bracket 37; the steering wheel 39 is mounted on the top end of the steering column 38; the hydraulic steering gear 40 is mounted on the bottom of the steering column 38, one end of the hydraulic steering gear 40 is connected to the priority valve assembly 59, and the other end is connected to the front drive axle 33 of the travel system D. In this embodiment, the steering wheel 39 is fixed on the top end of the steering column 38; the column mounting bracket 37 is fixed on the front wall panel of the cab 48 of the cover assembly E by bolts; the steering column 38 is fixed on the column mounting bracket 37 by a bracket; the hydraulic steering gear 40 is fixed on the bottom of the steering column 38 by bolts; the steering gear oil inlet pipe 41 is connected to the oil inlet of the hydraulic steering gear 40 at one end and connected to the priority valve assembly 59 in the hydraulic system G at the other end; the steering gear left oil outlet pipe 42 and the steering gear right oil outlet pipe 43 are connected to the left and right oil inlets of the left and right steering cylinders on the front drive axle 33 in the travel system D at one end and connected to the left and right steering cylinders on the front drive axle 33 in the travel system D at the other end; the steering gear oil return pipe 44 is connected to the oil return port of the hydraulic steering gear 40 at one end and connected to the oil return port of the hydraulic oil tank 56 in the hydraulic system G at the other end. The hydraulic steering gear 40 provides power for the steering system F to obtain steering, and the valve core position of the hydraulic steering gear 40 is moved by rotating the steering wheel 39 clockwise or counterclockwise, the left and right movement of the valve core controls the output and pressure of the steering valve pressure oil, the steering gear left oil outlet pipe 42 and the steering gear right oil outlet pipe 43 are connected to the steering cylinders on the front drive axle 33 in the travel system D, and the displacement of the piston rod is controlled to realize steering; the steering gear oil inlet pipe 41 is connected to the oil outlet of the priority valve assembly 59 in the hydraulic system G, the steering gear oil return pipe 44 is connected to the oil return port of the hydraulic oil tank 56 in the hydraulic system G, and the whole constitutes a steering power transmission oil inlet and return circulation.

[0054] As shown in Figure 5, the transmission system C includes a gearbox 25, a lubricating oil radiator 27, a front transmission shaft assembly 28, a rear axle assembly 30 and a brake assembly 26; the gearbox 25 is installed at the rear end of the frame 29 and connected with the two-in-one drive motor 12; the lubricating oil radiator 27 is used for heat dissipation of the lubricating oil in the transmission system C; the front transmission shaft assembly 28 is installed between the rear end of the front drive axle 33 of the walking system D and the front end of the gearbox 25, and is used for transmitting power to the front drive axle 33 of the walking system D; the rear axle assembly 30 is connected with the rear end of the gearbox 25, and is used for transmitting power to the rear drive wheel 35 of the walking system D; the brake assembly 26 is installed on the cover assembly E and connected with the oil port of the lubricating oil radiator 27 and the rear axle assembly 30 through the hydraulic system G, and is used for parking brake and service brake through hydraulic operation. Wherein, the front drive axle 33 is installed at the lower part of the front axle bracket in the frame 29, the oil cylinder of the front drive axle 33 is connected with the steering oil pipe of the steering system F, and the rear drive wheel 35 is installed at both ends of the rear axle assembly 30.

[0055] The front end of the gearbox 25 is connected with the rear end of the frame 29 through bolts, and is connected with the two-in-one drive motor 12 in the power system A through bolts; the rear end is connected with the rear axle assembly 30 through bolts; the brake assembly 26 is fastened on the cover assembly E, and is connected with the oil port of the lubricating oil radiator 27 and the rear axle assembly 30 through the gear pump assembly 70 in the hydraulic system G, the oil inlet and outlet pipe; the front transmission shaft assembly 28 is fastened between the rear end of the front drive axle 33 in the walking system D and the front end of the gearbox 25; the transmission system C can transmit the power of the two-in-one drive motor 12 assembly in the electric drive system B, realize PTO operation and walking function; the gearbox 25 transmits the power of the two-in-one drive motor 12 in the electric drive system B to the final transmission in the rear axle assembly 30, and finally transmits to the rear drive wheel 35 in the walking system D, completes the driving walking function, and realizes various operation modes; part of the power of the two-in-one drive motor 12 in the electric drive system B is transmitted to the front drive axle 33 in the walking system D through the front transmission shaft assembly 28, drives the front drive wheel 34 in the walking system D on both sides to rotate, and completes the walking function of the front wheel drive; part of the power of the two-in-one drive motor 12 in the electric drive system B is transmitted to the power output shaft through the gearbox 25, realizes stepless speed change, and can drive the working machine; the forward and reverse rotation of the two-in-one drive motor 12 in the electric drive system B realizes the forward and backward movement of the tractor; the lubricating oil radiator 27 can ensure that the temperature of the lubricating oil in the transmission system C is within a suitable range, improve the transmission efficiency, and reduce the energy consumption; the brake assembly 26 can realize the parking and service brake function.

[0056] As shown in Fig. 11, the front suspension device I includes a front suspension bracket 91, a front lifting rod and a front lifting cylinder, the front suspension bracket 91 is installed at the front end of the walking system D; the front lifting rod is hinged at one end of the front suspension bracket 91 and is used for connecting the front working implement at the other end; the front lifting cylinder is hinged at one end of the front suspension bracket 91 and is hinged at the other end of the front lifting rod, the front lifting cylinder is connected through the oil pipe and the hydraulic system G, and the hydraulic system G is used for adjusting the oil amount in the front lifting cylinder, so that the front lifting rod is lifted or lowered, and the front working implement is lifted or lowered.

[0057] In the embodiment, the front suspension bracket 91 is bolted to the front end face of the water tank bracket 32 in the walking system D; the front lifting rod is two, which are respectively a left front lifting rod 92 and a right front lifting rod 95, and the left front lifting rod 92 and the right front lifting rod 95 are installed at the bottom of the front suspension bracket 91 through the connecting pin shaft; the two front lifting cylinders are respectively a left front lifting cylinder 93 and a right front lifting cylinder 94, one end of each of the left front lifting cylinder 93 and the right front lifting cylinder 94 is installed on the front suspension bracket 91 through the connecting pin shaft, and the other end is installed on the left front lifting rod 92 and the right front lifting rod 95 through the connecting pin shaft; one end of the left front lifting cylinder oil pipe 97 and the right front lifting cylinder oil pipe 96 is connected with the oil inlet of the left front lifting cylinder 93 and the right front lifting cylinder 94 respectively, and the other end is connected with the oil port of the electric control multi-way valve assembly 65 respectively; the upper front lifting rod 98 is installed on the front suspension bracket 91 through the connecting pin shaft.

[0058] The front suspension bracket 91 provides installation support for the left front lifting rod 92 and the right front lifting rod 95. By controlling the electric control multi-way valve assembly 65 on the hydraulic system G, the oil amount of the hydraulic oil in the left front lifting cylinder 93 and the right front lifting cylinder 94 is controlled, so that the extension and retraction of the lifting cylinder piston rod is driven, the left front lifting rod 92 and the right front lifting rod 95 are lifted or lowered, and the lifting function of the front suspension device I is realized.

[0059] As shown in Fig. 10, the rear working device H includes a rear lifting rod, a rear lifting cylinder and a rear lifting rod, the rear lifting rod is hinged at the bottom of the rear axle assembly 30 of the transmission system C and is used for connecting the rear working implement; the rear lifting cylinder is hinged to the lifting arm of the rear axle assembly 30; the rear lifting rod is hinged to the lifting arm and the rear lifting rod at both ends respectively; the hydraulic system G is used for adjusting the oil amount of the rear lifting cylinder, so that the lifting arm is rotated, the rear lifting rod is lifted or lowered through the rear lifting rod, and the rear working implement is lifted or lowered.

[0060] The rear working device H further comprises an upper pull rod support 78 which is mounted on the upper part of the rear end face of the rear axle assembly 30 in the transmission system C by bolt mounting; an upper rear pull rod 82 is hinged to the upper pull rod support 78 through a connecting pin shaft; the right limiting rod 83 and the left limiting rod 74 are respectively hinged to the right limiting rod support and the left limiting rod support at one end, and are respectively hinged to the right rear pull rod 84 and the left rear pull rod 75 at the other end; the number of rear lifting rods is two, and the two rear lifting rods are respectively a left rear lifting rod 79 and a right rear lifting rod 80, and the two ends of the left rear lifting rod 79 and the right rear lifting rod 80 are respectively hinged to the left and right lifting arms on the rear axle assembly 30 and the left rear pull rod 75 and the right rear pull rod 84 through pin shafts; the number of rear lifting rods is two, and the two rear lifting rods are respectively a left rear lifting rod 75 and a right rear lifting rod 84, and the left rear lifting rod 75 and the right rear lifting rod 84 are respectively mounted on the bottom bent rod support of the rear axle assembly 30 in the transmission system C through pin shafts;

[0061] The number of rear lifting oil cylinders is two, and the two rear lifting oil cylinders are respectively a left rear lifting oil cylinder 77 and a right rear lifting oil cylinder 81, and the left rear lifting oil cylinder 77 and the right rear lifting oil cylinder 81 are hinged to the left and right lifting arms of the rear axle assembly 30 and the left and right oil cylinder supports; the traction seat 76 of the rear working device H is bolted to the bottom of the rear axle assembly 30 in the transmission system C; the traction frame 85 is bolted to the rear end face of the rear axle assembly 30 in the transmission system C; one end of the front traction rod 86 is mounted on the traction frame 85 through a first connecting pin 88, and the other end is mounted on the traction seat 76 through a second connecting pin 90; the rear traction rod 87 is bolted to the front traction rod 86.

[0062] The left rear lifting oil cylinder 77 and the right rear lifting oil cylinder 81 are respectively connected to the lifting valve oil outlet of the electric control multi-way valve assembly 65 through the rear lifting oil cylinder inlet pipe 67; the oil discharge port of the left rear lifting oil cylinder 77 and the right rear lifting oil cylinder 81 is connected to the rear lifting oil cylinder return pipe 68, and the rear lifting oil cylinder return pipe 68 is connected to the oil return joint on the hydraulic oil tank 56; by controlling the electric control multi-way valve assembly 65 on the hydraulic system G, the amount of hydraulic oil in the left rear lifting oil cylinder 77 and the right rear lifting oil cylinder 81 is controlled, so as to drive the extension and retraction of the lifting oil cylinder piston rod, push the lifting arm of the rear axle assembly 30 in the transmission system C to rotate around the lifting shaft, and lift or lower the left rear pull rod 75 and the right rear pull rod 84 through the left rear lifting rod 79 and the right rear lifting rod 80, so as to realize the lifting of the suspension rod of the rear working device H; the left limiting rod 74 and the right limiting rod 83 jointly act on the left rear pull rod 75 and the right rear pull rod 84 to limit the left and right positions of the left rear pull rod 75 and the right rear pull rod 84, and control the swing amount of the rear working machine; at the same time, different installation positions of the locking pin 89 are used to realize different swing angle requirements of the front traction rod 86.

[0063] As shown in Fig. 7, the cover assembly E further comprises an instrument cover 50, an operating platform 51, a seat 52, an interior layer 49 and an air conditioning system 55 arranged in the cab 48, the air conditioning system 55 is connected with the air conditioning compressor and the water pump on the engine 1 through pipes, the operating platform 51 and the seat 52 are used for integrated arrangement of operating handles and operating buttons, and the interior layer 49 is used for sealing, dustproofing, waterproofing, heat preservation and sound insulation; and the cover assembly E further comprises a front hood 45, a hood guard, a vehicle ladder 53 and a suspension 54, the front hood 45 covers the engine 1 and the frame 29, and is arranged at the front end of the cab 48; the hood guard is arranged between the front hood 45 and the two hood guards arranged at the two sides of the engine 1; the vehicle ladder 53 is arranged at the side of the cab 48; and the suspension 54 is arranged at the two sides of the frame 29 and connected with the rear axle assembly 30 of the transmission system C, and is used for shock absorption.

[0064] In the embodiment, the front hood 45 is arranged on the upper part of the engine 1 of the power system A and the frame 29 of the transmission system C through front and rear supports; the left hood guard 47 and the right hood guard 46 are arranged at the two sides of the engine 1 through bolts; when the front hood 45 falls, the front hood 45, the left hood guard 47 and the right hood guard 46 form a uniform assembly relationship; the instrument cover 50 is fixed on the central front wall plate and the front part of the floor of the cab 48 through bolts; the brake assembly 26 and the column mounting support 37 are fixedly arranged on the front wall plate of the cab 48 in the cover assembly E through bolts; the operating platform 51 is arranged at the right side of the cab 48 through bolts; the seat 52 is arranged in the central part of the floor of the cab 48 through bolts; the vehicle ladder 53 is arranged at the left front side of the floor of the cab 48 through bolts; the interior layer 49 is arranged in the cab 48 through self-tapping screws; the suspension 54 is fixedly arranged on the two sides of the frame 29 and the upper parts of the two sides of the rear axle assembly 30 through bolts; the air conditioning system 55 is arranged at the rear part of the cab 48 through bolts and connected with the air conditioning compressor and the water pump on the engine 1 through pipes; and the cab 48 is arranged on the suspension 54 through bolts.

[0065] The front hood 45, the right hood guard 46 and the left hood guard 47 provide protection for the engine 1 and have an aesthetic effect, and the lower part controls the front hood 45 through a lock; the cab 48 provides a sealed space for the driver and has the effects of safety protection, wind shielding and rain shielding; the operating platform 51 and the seat 52 realize integrated arrangement of various operating handles and operating buttons, different operating buttons can be selected according to different working conditions, and the working efficiency is improved; the interior layer 49 has the effects of sealing, dustproofing, waterproofing, heat preservation and sound insulation; and the suspension 54 provides comfort of the cab through the shock absorption function of the support.

[0066] In an embodiment, as shown in FIG. 6, the walking system D comprises a water tank bracket 32, a front counterweight 31, a front drive axle 33, front drive wheels 34, rear drive wheels 35 and a rear counterweight 36, the water tank bracket 32 is mounted at the front end of the front axle bracket in the frame 29, the front counterweight 31 is mounted at the front end of the water tank bracket 32, the front drive axle 33 is mounted at the lower part of the front axle bracket in the frame 29 and connected with the front drive shaft assembly 28 of the transmission system C, the oil cylinder of the front drive axle 33 is connected with the steering oil pipe of the steering system F, the front drive wheels 34 are mounted at the left and right ends of the front drive axle 33, the rear drive wheels 35 are mounted at the left and right ends of the rear axle assembly 30 of the transmission system C, and the rear counterweight 36 is mounted on the spoke of the rear drive wheel 35.

[0067] In the embodiment, the front counterweight 31 is mounted at the front end of the water tank bracket 32, the front drive axle 33 is mounted at the lower part of the front axle bracket in the frame 29, the front drive wheels 34 are mounted at the left and right ends of the front drive axle 33, the rear drive wheels 35 are mounted at the left and right ends of the rear axle assembly 30, and the rear counterweight 36 is mounted on the spoke of the rear drive wheel 35. The walking system D is connected with the rear axle assembly 30 of the transmission system C through the rear drive wheels 35 to realize the rear wheel drive walking function, is connected with the front drive axle assembly 28 of the transmission system C through the front drive axle 33 to realize the front wheel drive walking function, is connected with the front drive axle assembly 28 of the transmission system C through the front drive axle 33 to realize the front power transmission of the transmission system C and realize the walking function of the front wheel drive and the rear wheel drive, and is connected with the left and right steering oil pipes of the steering system F through the oil cylinder of the front drive axle 33 to realize the left and right steering functions. In the embodiment, the walking system D is provided with the front counterweight 31 and the rear counterweight 36 at the front end and the rear end respectively, which can improve the walking stability of the walking system D, and the walking system D walks in the four-wheel drive mode, so the walking horsepower is large and the slipping situation can be avoided.

[0068] In an embodiment, the new energy working machine is a large-horsepower electric tractor.

[0069] In the description of the present application, it should be understood that the terms "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0070] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0071] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

A new energy work machine, wherein The new energy working machine comprises: The assembled chassis comprises a front suspension device (I), a power system (A), an electric drive system (B) and a rear working device (H) connected in sequence from front to rear along the length direction of the new energy working machine, the front suspension device (I) and the rear working device (H) are used for respectively corresponding to the front working tool and the rear working tool, the electric drive system (B) comprises a range extender (10), a front PTO drive motor (100), a two-in-one drive motor (12) and an oil pump motor (13), the range extender (10) is used for converting mechanical energy transmitted by an engine (1) of the power system (A) into electric energy, and transmitting the electric energy to the front PTO drive motor (100), the two-in-one drive motor (12) and the oil pump motor (13), the two-in-one drive motor (12) comprises a rear PTO drive motor and a walking drive motor coaxially connected in series, and the front PTO drive motor (100), the oil pump motor (13), the rear PTO drive motor and the walking drive motor are sequentially arranged on the upper side of a rack (29) of the power system (A) from front to rear along the length direction of the vehicle; A front PTO assembly (101) is arranged at the front end of the front PTO drive motor (100) along the length direction of the vehicle, and the front PTO drive motor (100) is used for driving the front working tool to rotate through the front PTO assembly (101); A rear PTO assembly is arranged at the rear end of the rear PTO drive motor along the length direction of the vehicle, and the rear PTO drive motor is used for driving the rear working tool to rotate through the rear PTO assembly; A hydraulic system (G) is driven by the oil pump motor (13) through a variable pump (57), and the hydraulic system (G) is used for converting mechanical energy into hydraulic energy and controlling the rear working device (H) and the front suspension device (I) to act. The new energy working machine according to claim 1, wherein, The new energy working machine further comprises: A transmission system (C) is arranged between the electric drive system (B) and the rear working device (H) along the length direction of the vehicle; A cover assembly (E) is arranged above the assembled chassis and is used for protecting the power system (A), and the cover assembly (E) is provided with a cab (48) used for protecting a driver; A steering system (F) and the hydraulic system (G) are respectively arranged on the front and rear sides of the assembled chassis, the hydraulic system (G) is used for converting mechanical energy into hydraulic energy and controlling the steering system (F) to act; A walking system (D) is connected to the two sides of the assembled chassis in the width direction of the vehicle through the rack (29), the walking system (D) is used for driving the new energy working machine to travel, and the walking system (D) and the steering system (F) are connected and used for steering. The new energy working machine according to claim 2, wherein The power system (A) further comprises: A post processor (2) is arranged on the rack (29) and behind an exhaust pipe of the engine (1), and the post processor (2) is used for reducing tail gas emission and noise of the engine (1); A radiator water tank (3) is connected to the engine (1) through a water pipe, and the radiator water tank (3) is used for cooling the engine (1) through cooling liquid circulation. A first expansion water tank (4) is installed above the engine (1) and used to supplement the coolant to the radiator water tank (3) and the engine (1); A charge air cooler (5) and the radiator water tank (3) are both installed on the frame (29), and the charge air cooler (5) is connected to the air port of the engine (1) through an air pipe; A radiator fan (6) is installed on the fan shaft of the engine (1), and the radiator fan (6) and the charge air cooler (5) are used to provide low-temperature air for the engine (1); An air filter assembly (7) is installed above the engine (1) and used to provide clean air for the engine (1); An oil tank (8) is installed on both sides of the frame (29) in the vehicle width direction opposite to the aftertreatment device (2), and the oil tank (8) is used to store fuel oil; A urea tank (9) is used to provide urea for the aftertreatment device (2) and is installed below the aftertreatment device (2). The new energy working machine according to claim 3, wherein The electric drive system (B) further comprises: A motor controller (11) is used to control the two-in-one drive motor (12) and the oil pump motor (13); A high-voltage distribution box (16) is installed behind the cab (48) and is connected to the motor controller (11) through a high-voltage wire harness, and the high-voltage distribution box (16) is used to distribute electric current; A cooling water tank (18) is installed in front of the radiator water tank (3), and the cooling water tank (18) is connected to the oil pump motor (13), the two-in-one drive motor (12), the range extender generator (10), and the motor controller (11) through a water tank inlet pipe (20); An electronic water pump (17) is used to pump the coolant in the water tank inlet pipe (20) into the oil pump motor (13), the two-in-one drive motor (12), the range extender generator (10), and the motor controller (11); A water cooling unit (24) is installed on the frame (29); A PTC heater (23), the water cooling unit (24), and the PTC heater (23) are used to regulate the temperature of the power battery (22) of the electric drive system (B); A second expansion water tank (99) is installed above the engine (1), and the second expansion water tank (99) is connected to the water cooling unit (24) and the power battery (22) through a water pipe; The range extender generator (10), the oil pump motor (13), the motor controller (11), and the two-in-one drive motor (12) are sequentially installed on the frame (29). The new energy working machine according to claim 2, wherein The hydraulic system (G) comprises: A hydraulic oil tank (56) is installed on the frame (29) and used to store hydraulic oil; A priority valve assembly (59) is connected to one end of the variable pump (57) and the oil outlet of the hydraulic oil tank (56), and is connected to the other end of the priority valve assembly (59); An electronically controlled multi-way valve assembly (65) is connected to the oil return port of the hydraulic oil tank (56); A high-pressure oil filter (62) is connected to one end of the priority valve assembly (59) and the other end of the electronically controlled multi-way valve assembly (65). An oil return filter (63) is integrated in the hydraulic oil tank (56); A gear pump assembly (70); A hydraulic oil radiator (72) is connected to one end of the gear pump assembly (70) and to the oil return port of the hydraulic oil tank (56). The new energy working machine according to claim 5, wherein The steering system (F) comprises: A column mounting bracket (37) is mounted in the cab (48); A steering column (38) is mounted in the column mounting bracket (37); A steering wheel (39) is mounted at the top end of the steering column (38); A hydraulic steering gear (40) is mounted at the bottom of the steering column (38), one end of the hydraulic steering gear (40) is connected to the priority valve assembly (59), and the other end is connected to the front drive axle (33) of the travel system (D). The new energy working machine according to claim 2, wherein The transmission system (C) comprises: A gearbox (25) is mounted at the rear end of the frame (29) and connected to the two-in-one drive motor (12); A lubricating oil radiator (27) is used to dissipate heat from the lubricating oil in the transmission system (C); A front drive shaft assembly (28) is mounted between the rear end of the front drive axle (33) of the travel system (D) and the front end of the gearbox (25), the front drive shaft assembly (28) is used to transmit power to the front drive axle (33), the front drive axle (33) is mounted in the lower part of the front axle bracket of the frame (29), and the oil cylinder of the front drive axle (33) is connected to the steering oil pipe of the steering system (F); A rear axle assembly (30) is connected to the rear end of the gearbox (25), and is used to transmit power to the rear drive wheels (35) of the travel system (D), the rear drive wheels (35) are mounted at both ends of the rear axle assembly (30); A brake assembly (26) is mounted on the cover assembly (E) and connected to the oil port of the lubricating oil radiator (27) and the rear axle assembly (30) through the hydraulic system (G), the brake assembly (26) is used for parking brake and service brake through hydraulic operation of the hydraulic system (G). The transmission system (C) comprises: The new energy working machine according to claim 3, wherein A gearbox (25) is mounted at the rear end of the frame (29) and connected to the two-in-one drive motor (12); A lubricating oil radiator (27) is used to dissipate heat from the lubricating oil in the transmission system (C); A front drive shaft assembly (28) is mounted between the rear end of the front drive axle (33) of the travel system (D) and the front end of the gearbox (25), the front drive shaft assembly (28) is used to transmit power to the front drive axle (33), the front drive axle (33) is mounted in the lower part of the front axle bracket of the frame (29), and the oil cylinder of the front drive axle (33) is connected to the steering oil pipe of the steering system (F); ​ A rear axle assembly (30) is connected to the rear end of the gearbox (25) and is used to transmit power to the rear drive wheels (35) of the walking system (D), which are installed on both ends of the rear axle assembly (30); A brake assembly (26) is installed on the cover assembly (E) and is connected to the oil port of the rear axle assembly (30) through the hydraulic system (G), which is used for parking brake and service brake through hydraulic operation of the hydraulic system (G). The new energy working machine according to claim 2, wherein The front suspension device (I) comprises: A front suspension bracket (91) is installed on the front end of the walking system (D); A front lifting pull rod is hinged to the front suspension bracket (91) at one end and is used to connect the front work implement at the other end; A front lifting oil cylinder is hinged to the front suspension bracket (91) at one end and is hinged to the front lifting pull rod at the other end, and is connected to the hydraulic system (G) through an oil pipe, which is used to adjust the oil amount in the front lifting oil cylinder to lift or lower the front lifting pull rod and drive the front work implement to lift or lower. The new energy working machine according to claim 3, wherein The front suspension device (I) comprises: A front suspension bracket (91) is installed on the front end of the walking system (D); A front lifting pull rod is hinged to the front suspension bracket (91) at one end and is used to connect the front work implement at the other end; A front lifting oil cylinder is hinged to the front suspension bracket (91) at one end and is hinged to the front lifting pull rod at the other end, and is connected to the hydraulic system (G) through an oil pipe, which is used to adjust the oil amount in the front lifting oil cylinder to lift or lower the front lifting pull rod and drive the front work implement to lift or lower. The new energy working machine according to claim 2, wherein The rear work device (H) comprises: A rear lifting pull rod is hinged to the bottom of the rear axle assembly (30) of the transmission system (C) and is used to connect the rear work implement; A rear lifting oil cylinder is hinged to the lifting arm of the rear axle assembly (30); A rear lifting rod is hinged to the lifting arm and the rear lifting pull rod at both ends respectively; The hydraulic system (G) is used to adjust the oil amount in the rear lifting oil cylinder to rotate the lifting arm and lift or lower the rear lifting pull rod through the rear lifting rod to drive the rear work implement to lift or lower. The new energy working machine according to claim 3, wherein The rear work device (H) comprises: A rear lifting pull rod is hinged to the bottom of the rear axle assembly (30) of the transmission system (C) and is used to connect the rear work implement; A rear lifting oil cylinder is hinged to the lifting arm of the rear axle assembly (30); A rear lifting rod is hinged to the lifting arm and the rear lifting pull rod at both ends respectively; The hydraulic system (G) is used to adjust the oil amount in the rear lifting oil cylinder to rotate the lifting arm and lift or lower the rear lifting pull rod through the rear lifting rod to drive the rear work implement to lift or lower. The new energy working machine according to claim 2, wherein The cover assembly (E) further comprises an instrument cover (50), an operating platform (51), a seat (52), an interior layer (49) and an air conditioning system (55) arranged in the cab (48), the air conditioning system (55) is connected with the air conditioning compressor and the water pump on the engine (1) through pipelines, the operating platform (51) and the seat (52) are used for integrating operating handles and operating buttons, and the interior layer (49) is used for sealing, dustproofing, waterproofing, heat preservation and sound insulation. And / or; The cover assembly (E) further comprises: A front hood (45) covering the engine (1) and the frame (29), the front hood (45) is installed at the front end of the cab (48); Two hood aprons, the front hood (45) is located between the two hood aprons, and the two hood aprons are located on the two sides of the engine (1) respectively; A ladder (53) installed on the side of the cab (48); Suspensions (54) installed on the two sides of the frame (29) and connected with the rear axle assembly (30) of the transmission system (C), the suspensions (54) are used for damping. The new energy working machine according to claim 3, wherein The cover assembly (E) further comprises an instrument cover (50), an operating platform (51), a seat (52), an interior layer (49) and an air conditioning system (55) arranged in the cab (48), the air conditioning system (55) is connected with the air conditioning compressor and the water pump on the engine (1) through pipelines, the operating platform (51) and the seat (52) are used for integrating operating handles and operating buttons, and the interior layer (49) is used for sealing, dustproofing, waterproofing, heat preservation and sound insulation. And / or; The cover assembly (E) further comprises: A front hood (45) covering the engine (1) and the frame (29), the front hood (45) is installed at the front end of the cab (48); Two hood aprons, the front hood (45) is located between the two hood aprons, and the two hood aprons are located on the two sides of the engine (1) respectively; A ladder (53) installed on the side of the cab (48); Suspensions (54) installed on the two sides of the frame (29) and connected with the rear axle assembly (30) of the transmission system (C), the suspensions (54) are used for damping. The new energy working machine according to claim 2, wherein The walking system (D) comprises: A water tank bracket (32) installed at the front end of the front axle bracket in the frame (29); A front counterweight (31) installed at the front end of the water tank bracket (32); Front drive wheels (34) installed at the left and right ends of the front drive axle (33) of the walking system (D); A rear counterweight (36) installed on the web of the rear drive wheel (35) of the walking system (D). The new energy working machine according to claim 2, wherein The new energy working machine further comprises a controller, and the controller is configured to: Determine that the new energy working machine is in a heavy load working mode, control the walking drive motor and the rear PTO drive motor in the two-in-one drive motor (12) to be coupled and driven, so that the walking drive motor and the rear PTO drive motor simultaneously provide power to the walking system (D). Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). The new energy working machine according to claim 3, wherein The new energy working machine further comprises a controller configured to: Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). The new energy working machine according to claim 4, wherein The new energy working machine further comprises a controller configured to: Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). The new energy working machine according to claim 5, wherein The new energy working machine further comprises a controller configured to: Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). Determine that the new energy working machine is in a heavy load working mode, control the walking driving motor and the rear PTO driving motor in the two-in-one driving motor (12) to be coupled and driven, so that the walking driving motor and the rear PTO driving motor simultaneously provide power to the walking system (D). The new energy working machine according to claim 1, wherein, The new energy working machine is a large-horsepower electric tractor.

Images