Fuel and electric energy dual-energy driving system and loader-digger thereof

Abstract

The utility model discloses a fuel and electric energy dual-energy driving system and a backhoe loader thereof, which belong to the technical field of vehicle engineering, and the fuel and electric energy dual-energy driving system comprises a power battery, a distribution box, a walking motor, a walking motor controller, a generator, a generator controller and a fuel engine, the walking motor drives the axle transmission shaft to rotate through the transfer case, the generator controller is electrically connected with the generator, and the generator is in driving connection with the fuel engine. The backhoe loader comprises the fuel and electric energy dual-energy driving system, and a hydraulic system of the backhoe loader is connected with an oil pump. Under the allocation of the distribution box, the power battery can be freely and flexibly matched with a power generation system formed by the fuel engine and the generator to provide power output, the power output is diversified, the problems of no charging and endurance time anxiety are solved, the fuel oil consumption is low, the use cost is reduced, the high-grade emission requirement can be met more easily, and the environment-friendly effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle engineering, in particular to a fuel and electric energy dual energy drive system and an excavator loader thereof. Background Art

[0002] Faced with rising oil prices, turbulent world situations, and increasingly stringent emission regulations, traditional internal combustion engine construction machinery and vehicles are becoming less and less friendly. With the development of lithium battery technology, variable frequency motor drive technology, and high-voltage DC charging technology, construction machinery and vehicles will also develop in the direction of electric-driven fuel engine power generation and energy replenishment. However, some application scenarios are inconvenient to charge, or even impossible to charge, which is not conducive to the use of vehicles driven by pure electric energy, resulting in serious anxiety about charging and battery life for pure electric vehicles, such as excavators and loaders used in mountain construction sites. How to solve the anxiety about charging and battery life of vehicles is an urgent problem that needs to be solved. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and to provide a fuel and electricity dual-energy drive system and an excavator loader thereof. Driven by a fuel engine, a generator can be driven to generate electricity. Under the allocation of a distribution box, it can be flexibly matched with a power battery to provide power output. The power output is diversified, which solves the anxiety of no charging and endurance time, and has low fuel consumption, reduced use costs, and is easier to meet high-level emission requirements, making it more environmentally friendly.

[0004] To achieve the above-mentioned purpose, the utility model provides the following solution: The utility model discloses a dual-energy drive system of fuel and electricity, including a power battery, a distribution box, a travel motor, a travel motor controller, a generator, a generator controller and a fuel engine, the distribution box is electrically connected to the power battery, the travel motor controller and the generator controller, the travel motor controller is electrically connected to the travel motor, the travel motor drives the axle drive shaft to rotate through a transfer case, the generator controller is electrically connected to the generator, and the generator is drivingly connected to the fuel engine.

[0005] Preferably, the travel motor is connected to the transfer case via a travel motor reducer.

[0006] Preferably, it also includes an oil pump, an oil pump motor, and an oil pump motor controller, the oil pump motor controller is electrically connected to the oil pump motor, the distribution box is electrically connected to the oil pump motor controller, the oil pump motor controller is electrically connected to the oil pump motor, and the oil pump motor is connected to the oil pump.

[0007] Preferably, the oil pump motor is connected to the oil pump via an oil pump motor reducer.

[0008] Also disclosed is an excavator loader, on which the fuel and electric energy dual energy drive system as described above is installed, the axle drive shaft of the excavator loader is connected to the transfer case, and the hydraulic system of the excavator loader is connected to the oil pump through a hydraulic pipeline.

[0009] Preferably, it includes a frame, the fuel and electricity dual-energy drive system is installed on the excavator loader, the fuel and electricity dual-energy drive system is installed on the frame, the bottom of the frame is provided with a front axle, a rear axle, and an axle drive shaft, the front axle and the rear axle are driven by the axle drive shaft, the front end and the rear end of the frame are respectively provided with a front working mechanism and a rear working mechanism, the front working mechanism and the rear working mechanism are driven by a hydraulic system, and the front axle and the rear axle are both provided with tires.

[0010] Preferably, a cab is mounted on the frame.

[0011] Preferably, a water-cooled radiator is installed on the frame, and the water-cooled radiator is electrically connected to the distribution box. The water-cooled radiator cools the power battery, the travel motor, the travel motor controller, the generator, the generator controller, the fuel engine, the oil pump motor and the oil pump motor controller through a water cooling pipe.

[0012] Preferably, a refrigeration system is installed on the frame, the refrigeration system is electrically connected to the distribution box, and the refrigeration system performs refrigerant cooling on the water-cooled radiator, the cab, and the power battery through a refrigerant pipeline.

[0013] Preferably, the oil pump is a gear pump.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The utility model provides a travel motor as a power source for the vehicle, which can be provided by a power battery or by a fuel power generation system composed of a fuel engine and a generator. Under the allocation of a distribution box, the power battery can be flexibly matched with the fuel power generation system, and the matching ratio can be freely preset. The power output is diversified, which solves the anxiety of no charging and endurance time, and has low fuel consumption, reduced use cost, easier to meet high-level emission requirements, and more environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 The schematic diagram of the structure of the backhoe loader is shown in FIG.

[0018] Figure 2 This is a schematic diagram of the structure of the dual-energy drive system of fuel and electricity.

[0019] Explanation of the reference numerals: 1. Frame; 2. Front axle; 3. Rear axle; 4. Axle drive shaft; 5. Front working mechanism; 6. Rear working mechanism; 7. Tire; 8. Driver's cab; 9. Water-cooled radiator; 10. Refrigeration system; 11. Power battery; 12. Distribution box; 13. Travel motor; 14. Travel motor reducer; 15. Travel motor controller; 16. Generator; 17. Generator controller; 18. Fuel engine; 19. Transfer case; 20. Oil pump; 21. Oil pump motor; 22. Oil pump motor controller; 23. Oil pump motor reducer. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example 1

[0022] This embodiment provides a fuel and electric energy dual energy drive system, such as Figure 1 to Figure 2 As shown, it can be widely used in various types of mobile machinery and vehicles, especially excavators and loaders. The fuel and electric energy dual energy drive system includes a power battery 11, a distribution box 12, a travel motor 13, a travel motor controller 15, a generator 16, a generator controller 17 and a fuel engine 18. The distribution box 12 is electrically connected to the power battery 11, the travel motor controller 15, and the generator controller 17. The travel motor controller 15 is electrically connected to the travel motor 13. The travel motor 13 drives the axle drive shaft 4 to rotate through the transfer case 19 to provide power for the front axle 2 and the rear axle 3 of the vehicle. The generator controller 17 is electrically connected to the generator 16, and the generator 16 is connected to the fuel engine 18. The fuel engine 18 burns fuel to drive the generator 16 to generate electricity. The distribution box 12 adopts a high-voltage distribution box. In special cases, a distribution box composed of a high-voltage distribution box and a low-voltage distribution box can be used. The power battery 11 transmits DC power to the distribution box 12, which is distributed to the travel motor controller 15 and the generator controller 17 by the distribution box 12. The travel motor controller 15 converts the direct current provided by the power battery 11 into the alternating current required by the travel motor 13 , and drives the vehicle to move forward, stop or move backward according to the driver's intention.

[0023] Working principle:

[0024] Under the control of the distribution box 12, the travel motor controller 15 can use the power of the power battery 11 to drive the travel motor 13 to realize the rotation of the axle drive shaft 4, or use the power provided by the generator 16 to drive the travel motor 13 to realize the rotation of the axle drive shaft 4. The distribution box 12 can use the power of the power battery 11 to power the travel motor controller 15 and the generator controller 17, or use the power generated by the generator 16 to power the travel motor controller 15 and the generator controller 17. The power battery 11 and the generator 16 can be used flexibly. In the initial stage, the power battery 11 mainly provides power. In the subsequent stage, the fuel engine 18 can be started to drive the generator 16 to generate electricity. The power battery 11 and the generator 16 provide power together, or only the generator 16 provides power. The specific start time of the fuel engine 18 is adjusted according to actual needs, and is usually divided into three situations: 1. When the power battery 11 is insufficient (reaching the minimum power requirement value); 2. The power value preset by the user; 3. The value preset according to the vehicle power consumption. Of course, the above three situations are only for reference, and other methods can also be used for preset, or it can be started manually.

[0025] Further, in this embodiment, if Figure 1 to Figure 2 As shown, the travel motor 13 is connected to the transfer case 19 via a travel motor reducer 14 .

[0026] Further, in this embodiment, if Figure 1 to Figure 2 As shown, the fuel and electric energy dual energy drive system also includes an oil pump 20, an oil pump motor 21, and an oil pump motor controller 22. The distribution box 12 is electrically connected to the oil pump motor controller 22. The oil pump motor controller 22 is electrically connected to the oil pump motor 21, and the oil pump motor 21 is connected to the oil pump 20. The distribution box 12 provides electric energy to the oil pump motor controller 22, and the oil pump motor controller 22 converts the DC power provided by the power battery 11 into the AC power required by the motor to drive the oil pump motor 21. The output shaft of the oil pump motor 21 drives the oil pump 20 to work, and the oil pump 20 can be connected to the hydraulic system of the vehicle or machinery. Driving the oil pump 20 provides hydraulic power for the steering, braking and working mechanisms of the vehicle.

[0027] In this embodiment, Figure 1 to Figure 2 As shown, the oil pump motor 21 is connected to the oil pump 20 via an oil pump motor reducer 23 .

[0028] Further, in this embodiment, if Figure 1 to Figure 2 As shown, the power battery 11 may be a lithium-ion battery, a lithium-polymer battery, a nickel-cadmium battery or a nickel-metal hydride battery.

[0029] In this embodiment, Figure 1 to Figure 2As shown, the fuel of the fuel engine 18 includes but is not limited to diesel, and also includes ammonia, alcohol, ether, hydrogen and other fuels.

[0030] Further, in this embodiment, if Figure 1 to Figure 2 As shown, the mechanical energy output by the fuel engine 18 is not limited to high-voltage power generation, but also includes 24V or 12V low-voltage system power generation.

[0031] Example 2

[0032] This embodiment provides a backhoe loader, such as Figure 1 to Figure 2 As shown, the fuel and electric energy dual energy drive system with oil pump 20, oil pump motor 21, and oil pump motor controller 22 in embodiment 1 is installed on the backhoe loader, the axle drive shaft 4 of the backhoe loader is connected to the transfer case 19, and the hydraulic system of the backhoe loader is connected to the oil pump 20 through a hydraulic pipeline. The backhoe loader provides traveling power through the travel motor 13, and the travel motor 13 is regulated by the distribution box 12, firstly provided by the power battery 11, and then provided by the power battery 11 and the generator 16 together, or only by the generator 16. The specific timing of the generator 16 to generate electricity is set according to actual needs, and is generally divided into three situations: one, when the power battery 11 is insufficient (reaching the minimum power demand value); two, the power value preset by the user; three, when the value preset according to the vehicle power consumption situation, of course, the above three situations are only for reference, and other situations can also be used for preset, such as according to the site conditions (working time, charging pile configuration, fuel supply situation) and the driver's habits, or it can be started manually at any time.

[0033] In this embodiment, Figure 1 to Figure 2 As shown, the vehicle comprises a frame 1, and the electric dual energy drive system is installed on the frame 1. A front axle 2, a rear axle 3, and an axle drive shaft 4 are provided at the bottom of the frame 1, and the front axle 2 and the rear axle 3 are driven by the axle drive shaft 4. A front working mechanism 5 and a rear working mechanism 6 are respectively provided at the front end and the rear end of the frame 1, and the front working mechanism 5 and the rear working mechanism 6 are driven by a hydraulic system, and tires 7 are provided on the front axle 2 and the rear axle 3.

[0034] In this embodiment, Figure 1 to Figure 2 As shown, a cab 8 is mounted on the vehicle frame 1 .

[0035] In this embodiment, Figure 1 to Figure 2 As shown, a water-cooled radiator 9 is installed on the vehicle frame 1, and the water-cooled radiator 9 is electrically connected to the distribution box 12. The water-cooled radiator 9 performs water cooling and heat dissipation on the power battery 11, the travel motor 13, the travel motor controller 15, the generator 16, the generator controller 17, the fuel engine 18, the oil pump motor 21 and the oil pump motor controller 22 through the water cooling pipe.

[0036] In this embodiment, Figure 1 to Figure 2 As shown, a refrigeration system 10 is installed on the vehicle frame 1, and the refrigeration system 10 is electrically connected to the distribution box 12. The refrigeration system 10 performs refrigerant cooling on the water-cooled radiator 9, the cab 8, and the power battery 11 through the refrigerant pipeline.

[0037] In this embodiment, Figure 1 to Figure 2 As shown, the oil pump 20 is a gear pump.

[0038] In this embodiment, Figure 1 to Figure 2 As shown, the backhoe loader can charge the power battery 11 through a fixed charging pile. The fuel used includes but is not limited to diesel, gasoline, methanol, ammonia, etc.

[0039] In this embodiment, Figure 1 to Figure 2 As shown, a specific setting method is provided, the power battery 11 is fixed to the battery bracket by bolts, and the battery bracket is fixed to the frame 1 by bolts, and is located on the inner side of the frame longitudinal beam of the frame 1 and below the cab 8. The travel motor 13 and the travel motor reducer 14 are fixed to the bottom of the battery bracket by a rubber pad suspension device. The generator 16 is connected to the fuel engine 18 by bolts to form an assembly, and is fixed to the frame 1 by a rubber pad suspension device, and is located in the engine compartment. The power of the fuel engine 18 is only used for power generation, and does not drive the vehicle to travel and the oil pump 20. The oil pump motor 21 and the oil pump motor reducer 23 are connected to the frame 1 by a rubber pad suspension device. The water-cooled radiator 9 is fixed to the right side of the frame 1 through a metal bracket and the frame 1, and the water channels of each motor, each controller, engine, power battery 11 and the water-cooled radiator 9 are connected through a rubber water pipe to water-cool the heat dissipation of each component. The refrigeration system 10 provides refrigerant cooling for the passenger compartment air conditioner and the power battery 11. The distribution box 12 adopts a high-voltage distribution box, which is connected to the power battery 11, the generator controller 17, the oil pump motor controller 22, the travel motor controller 15, and the refrigeration system 10 through high-voltage cables, and distributes the electric energy provided by the power generation system driven by the power battery 11 or the fuel engine 18 to the generator controller 17, the oil pump motor controller 22, the travel motor controller 15, and the refrigeration system 10 according to the vehicle operating status.

[0040] The power battery 11 transmits high-voltage DC power to the high-voltage distribution box through high-voltage cables, and the high-voltage distribution box distributes it to the travel motor controller 15 and the oil pump motor controller 22. The travel motor controller 15 converts the DC power provided by the power battery 11 into the AC power required by the motor, driving the vehicle to move forward, stop or reverse according to the driver's intention. The oil pump motor controller 22 converts the DC power provided by the power battery 11 into the AC power required by the motor, driving the oil pump 20, and the gear oil pump provides hydraulic power for the vehicle's steering, braking and working mechanisms.

[0041] Traditional backhoe loaders all use diesel engines as power sources, which are connected to the gearbox through a hydraulic coupler, and the gear oil pump obtains power through the power take-off interface on the gearbox. The transmission efficiency of this structure is low. When the driver operates the vehicle, the engine frequently changes its working conditions and frequently has low-speed and high-torque impacts, resulting in low engine fuel efficiency, high pollutant emissions, and high fuel consumption. This backhoe loader provides vehicle travel and hydraulic system power respectively by variable frequency motors, decouples power from the fuel engine, and uses the characteristics of low-speed and high-torque of the electric motor and high efficiency of electrical energy-mechanical energy conversion to reduce the average power consumption of the vehicle. It also uses the characteristics of high-speed, high-torque and constant-power operation of the engine with high fuel efficiency to further reduce fuel consumption. The vehicle can use charging piles to obtain electricity from the power grid, does not rely on fuel to work, and gets rid of dependence on oil. At the same time, the way to obtain electricity is wide and the price is low, which minimizes the operating cost of the vehicle. The driver can choose the proportion of electricity and fuel usage for the vehicle to ensure continuous operation of the vehicle while reducing the cost of use.

[0042] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A fuel and electric energy dual energy drive system, characterized in that: It includes a power battery, a distribution box, a travel motor, a travel motor controller, a generator, a generator controller and a fuel engine. The distribution box is electrically connected to the power battery, the travel motor controller and the generator controller. The travel motor controller is electrically connected to the travel motor. The travel motor drives the axle drive shaft to rotate through a transfer case. The generator controller is electrically connected to the generator. The generator is drivingly connected to the fuel engine.

2. A fuel and electric energy dual energy drive system according to claim 1, characterized in that: The travel motor is connected to the transfer case via a travel motor reducer.

3. A fuel and electric energy dual energy drive system according to claim 2, characterized in that: It also includes an oil pump, an oil pump motor, and an oil pump motor controller. The distribution box is electrically connected to the oil pump motor controller, the oil pump motor controller is electrically connected to the oil pump motor, and the oil pump motor is connected to the oil pump.

4. A fuel and electric energy dual energy drive system according to claim 3, characterized in that: The oil pump motor is connected to the oil pump via an oil pump motor reducer.

5. A backhoe loader, characterized in that: The fuel and electricity dual-energy drive system as described in claim 3 or 4 is installed on the backhoe loader, the axle drive shaft of the backhoe loader is connected to the transfer case, and the hydraulic system of the backhoe loader is connected to the oil pump through a hydraulic pipeline.

6. The backhoe loader according to claim 5, characterized in that: The vehicle comprises a frame, the fuel and electric dual energy drive system is installed on the excavator loader, the fuel and electric dual energy drive system is installed on the frame, a front axle, a rear axle and an axle drive shaft are arranged at the bottom of the frame, the front axle and the rear axle are driven by the axle drive shaft, a front working mechanism and a rear working mechanism are respectively arranged at the front end and the rear end of the frame, the front working mechanism and the rear working mechanism are driven by a hydraulic system, and tires are arranged on the front axle and the rear axle.

7. The backhoe loader according to claim 6, characterized in that: A cab is installed on the vehicle frame.

8. The backhoe loader according to claim 7, characterized in that: A water-cooled radiator is installed on the frame, and the water-cooled radiator is electrically connected to the distribution box. The water-cooled radiator performs water cooling on the power battery, the travel motor, the travel motor controller, the generator, the generator controller, the fuel engine, the oil pump motor and the oil pump motor controller through a water cooling pipe.

9. The backhoe loader according to claim 8, characterized in that: A refrigeration system is installed on the vehicle frame, the refrigeration system is electrically connected to the distribution box, and the refrigeration system performs refrigerant cooling on the water-cooled radiator, the cab, and the power battery through a refrigerant pipeline.

10. The backhoe loader according to claim 5, characterized in that: The oil pump is a gear pump.

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