Power system of engineering machinery and engineering machinery

Abstract

The embodiment of the invention provides a power system of an engineering machine and the engineering machine. The power system comprises at least one electric drive axle, a running system, a loading system, a driving motor and an electric control unit. The electric control unit is respectively connected with the electric drive axle and the drive motor; the loading system comprises a first system, a second system and a third system; the driving motor is connected with at least one of a first system, a second system and a third system in the loading system; the electric drive axle is connected with at least one of the first system, the second system and the third system in the loading system, and the electric drive axle is connected with the driving system. According to the scheme, the control difficulty of the power system is effectively reduced, the structure is simple, and the cost is low.

Description

Technical Field

[0001] This application relates to the technical field of construction machinery, and particularly to a power system for construction machinery and a construction machinery. Background Art

[0002] Nowadays, construction machinery is widely used. In order to effectively reduce production costs and significantly improve its cost performance, the adoption of electrification technology has become the best way to achieve energy-saving economy.

[0003] In the specific application of electrification technology, the fuel efficiency of the engine can be significantly improved by range-extended power generation. However, there is currently a problem that the electric drive is required for both driving and pumping operations, and each component is driven by a separate motor.

[0004] Although this method ensures the independence of the operation of each component to a certain extent, it results in an extremely complex structure layout and a significant increase in control difficulty. Summary of the Invention

[0005] The embodiments of this application provide a power system for construction machinery and a construction machinery, aiming to solve the technical problems of the complex structure of the corresponding power system, high hardware and control costs under the existing method in different operation modes.

[0006] In a first aspect, the embodiments of this application provide a power system for construction machinery. The power system includes: at least one electric drive axle, a driving system, an upper-mounted system, a driving motor, and an electronic control unit; the electronic control unit is respectively connected to the electric drive axle and the driving motor; the upper-mounted system includes a first system, a second system, and a third system;

[0007] The driving motor is connected to at least one of the first system, the second system, and the third system in the upper-mounted system;

[0008] The electric drive axle is connected to at least one of the first system, the second system, and the third system in the upper-mounted system, and the electric drive axle is connected to the driving system.

[0009] In one or more embodiments, the number of electric drive axles is one;

[0010] The driving motor is connected to the first system; the electric drive axle is connected to the second system and the third system.

[0011] In one or more embodiments, the driving motor is connected to the first system;

[0012] The electric drive axle includes two power output ports. One power output port of the electric drive axle is connected to the second system, and the other power output port of the electric drive axle is connected to the third system. The power of the electric drive axle is output to the second system and the third system through the power output ports.

[0013] In one or more embodiments, the drive motor is connected to the first system;

[0014] The electric drive axle includes one power output port. The power output port of the electric drive axle is connected to the second system, and the power of the electric drive axle is output to the second system through the power output port.

[0015] The second system in the superstructure system is connected to the third system. When the third system is operating, the second system transfers the power transmitted by the electric drive axle to the third system.

[0016] In one or more embodiments, the number of electric drive axles is one;

[0017] The drive motor is respectively connected to the first system and the second system. The electric drive axle includes one power output port. The power output port of the electric drive axle is connected to the third system, and the power of the electric drive axle is output to the third system through the power output port.

[0018] In one or more embodiments, the number of electric drive axles is two. The two electric drive axles include a first electric drive axle and a second electric drive axle;

[0019] The first electric drive axle and the second electric drive axle are connected to the first system and the second system. The drive motor is connected to the third system.

[0020] In one or more embodiments, the first electric drive axle is connected to the first system, and the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle. The second electric drive axle is connected to the second system, and the power of the second electric drive axle is output to the second system through the power output port of the second electric drive axle. The first electric drive axle and the second electric drive axle are both connected to the driving system;

[0021] The drive motor is connected to the third system.

[0022] In one or more embodiments, the first electric drive axle is connected to the first system, and the first system is connected to the second system; the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; when the second system needs to operate, the first system transmits the power transmitted by the first electric drive axle to the second system;

[0023] Both the first electric drive axle and the second electric drive axle are connected to the driving system;

[0024] The drive motor is connected to the third system.

[0025] In one or more embodiments, the number of electric drive axles is two; the two electric drive axles include a first electric drive axle and a second electric drive axle;

[0026] The first electric drive axle is connected to the first system, and the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; both the first electric drive axle and the second electric drive axle are connected to the driving system;

[0027] The drive motor is respectively connected to the second system and the third system.

[0028] In one or more embodiments, the power system further includes one or more of: a battery system, a power generation system assembly, and an external power supply interface:

[0029] Among them, the battery system, the power generation system assembly, and the external power supply interface are respectively connected to the electronic control unit to supply electric energy to the electronic control unit.

[0030] In a second aspect, an embodiment of the present application provides a construction machine, and the power system of the construction machine as described in the first aspect and any one of the above is provided in the construction machine.

[0031] In a third aspect, an embodiment of the present application provides a control method for a construction machine, which is applied to the electronic control unit in the power system described in the first aspect and any one of the above, and the method includes:

[0032] Controlling the operation of the electric drive axle and / or the drive motor in the power system to drive the operation of the upper mounting system and / or the driving system in the construction machine.

[0033] In a fourth aspect, an embodiment of the present application provides a control device for a construction machine, which is applied to the electronic control unit in the power system described in the first aspect and any one of the above, and the control device includes:

[0034] A control module, configured to control the operation of the electric drive axle and / or the drive motor in the power system to drive the operation of the upper mounting system and / or the traveling system in the construction machinery.

[0035] In a fifth aspect, an embodiment of the present application provides an electronic control unit, including: a memory and a processor;

[0036] The memory stores computer-executable instructions;

[0037] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the possible implementation manners in the third aspect as above.

[0038] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, they are used to implement the first aspect and / or various possible implementation manners of the first aspect as above.

[0039] In a seventh aspect, an embodiment of the present application provides a computer program product, including a computer program, and when the computer program is executed by a processor, it implements the third aspect and / or various possible implementation manners of the third aspect as above.

[0040] The power system and the construction machinery provided by the embodiments of the present application, the power system includes: at least one electric drive axle, a traveling system, an upper mounting system, a drive motor, and an electronic control unit; the electronic control unit is respectively connected to the electric drive axle and the drive motor; the upper mounting system includes a first system, a second system, and a third system; the drive motor is connected to at least one of the first system, the second system, and the third system in the upper mounting system; the electric drive axle is connected to at least one of the first system, the second system, and the third system in the upper mounting system, and the electric drive axle is connected to the traveling system. In this solution, the power system realizes the output of electric energy and the operation drive through the connection between the electronic control unit and the electric drive axle and the drive motor, and the association between the electric drive axle and the traveling system and the upper mounting system. By integrating the connection relationship between the electronic control unit and components such as the electric drive axle, the system structure is simplified, and unnecessary hardware configurations are reduced; at the same time, the reasonable connection method makes the control logic clearer, reducing the control difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.

[0042] Figure 1 Structural schematic diagram of the power system of the construction machinery provided by the embodiment of the present application Figure 1 ;

[0043] Figure 2Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 2 ;

[0044] Figure 3 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 3 ;

[0045] Figure 4 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 4 ;

[0046] Figure 5 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 5 ;

[0047] Figure 6 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 6 ;

[0048] Figure 7 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 7 ;

[0049] Figure 8 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 8 ;

[0050] Figure 9 Structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 9 ;

[0051] Figure 10 Structural schematic of the construction machinery provided by the embodiment of the present application;

[0052] Figure 11 Schematic diagram of the control method of the construction machinery provided by the embodiment of the present application;

[0053] Figure 12 Schematic diagram of the structure of the control device of the construction machinery provided by the embodiment of the present application;

[0054] Figure 13 Schematic diagram of the structure of the electronic control unit provided by the embodiment of the present application.

[0055] Through the above-mentioned drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0056] Here, exemplary embodiments will be described in detail, and their examples are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0057] First, the technical background of the embodiments of the present application will be described:

[0058] In related vehicles of construction machinery, for example, concrete pump trucks are widely used. In order to effectively reduce production costs and significantly improve their cost performance, the adoption of electrification technology has become the best way to achieve energy-saving economy.

[0059] Electrification technology can not only reduce the dependence on traditional fuel and lower fuel costs, but also significantly reduce the vehicle's maintenance costs. Because the electric system has fewer components, operates more stably, and has a lower failure rate compared to the traditional fuel system, it can save a large amount of costs for users in the long term.

[0060] In the specific application of electrification technology, the fuel efficiency of the engine can be significantly improved through range-extended power generation. However, there is currently a problem that the relevant electric drives for driving and pumping operations (i.e., the upper body) both require the intervention of motors, and each component adopts the method of being driven by a separate motor.

[0061] Although this method ensures the independence of the operation of each component to a certain extent, it leads to an extremely complex structure layout and a significant increase in control difficulty. At the same time, numerous separate motors also cause a substantial increase in the equipment procurement cost. From the purchase cost of the motor itself to the cost of the control system supporting it, the investment in the entire project is significantly increased.

[0062] In view of the technical problems existing in the prior art, the concept of the inventors of the present application is as follows. To meet the diverse power requirements of construction machinery during driving and operation, if an electric drive axle can be adopted, it can take into account the power supply for vehicle driving and at the same time transmit the power to some systems in the upper body system, so that the upper body operation can directly obtain power support; and the electronic control unit, as the core hub, is respectively set to connect another part of the electric drive axle and the upper body system. Thus, during operation or driving, by controlling the energy supply situation of the electric drive axle, the system structure can be streamlined, and it can meet the driving or upper body operation requirements of construction machinery, save layout space, and achieve the purpose of reducing costs and increasing efficiency for the whole machine.

[0063] Next, the technical solution of the present application and how the technical solution of the present application solves the above technical problems will be described in detail with specific embodiments:

[0064] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The following will introduce the content related to the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the construction machinery in the embodiments of the present application can be a concrete pump truck, a wet shotcreting machine, a fire truck, etc. In the text, the concrete pump truck is taken as an example for illustrative purposes.

[0065] Figure 1 Structural schematic of the power system of the construction machinery provided in the embodiments of the present application Figure 1 , such as Figure 1 shown, the power system 104 of the construction machinery includes: at least one electric drive axle 100, a traveling system 101, an upper-mounted system 102, a drive motor 106, and an electronic control unit 103;

[0066] The electronic control unit 103 is respectively connected to the electric drive axle 100 and the drive motor 106; the upper-mounted system 102 includes a first system 1021, a second system 1022, and a third system 1023.

[0067] In Figure 1 the example shown, subsystem A represents at least one of the first system 1021, the second system 1022, and the third system 1023 in the upper-mounted system 102 (e.g., the first system 1021 and the second system 1022); subsystem B represents at least one of the first system 1021, the second system 1022, and the third system 1023 in the upper-mounted system 102 (e.g., the third system 1023).

[0068] In a possible implementation, taking a concrete pump truck as an example, the upper-mounted system 102 (i.e., the first system 1021, the second system 1022, and the third system 1023) may include: at least one of a pumping system, an auxiliary system (such as a mixing system), and a boom system.

[0069] Among them, the pumping system may include: a concrete pump, a conveying pipeline, a hopper, etc., for efficiently and continuously transporting concrete from a mixing plant or other feeding locations to a designated location at the construction site; the boom system may include: multiple boom sections, hydraulic cylinders, a slewing mechanism, etc., for accurately pouring the concrete transported by the pumping system to a designated location; the auxiliary system may include: a mixing drum, a mixing shaft, a driving device, etc., for mixing the concrete during the concrete transportation process to prevent the concrete from segregation and solidification, and ensure the quality and working performance of the concrete.

[0070] Optionally, the electronic control unit 103 is connected to at least one of the first system 1021, the second system 1022, and the third system 1023 in the upper-mounted system 102 through the drive motor to output electric energy;

[0071] In this implementation, the subsystems A in the superstructure system 102 connected to the electronic control unit 103 can be connected by cables and signal lines (for example, if there is a control structure for the superstructure motor in the subsystem A of the superstructure system 102 to be connected, signal lines can be set; if there is no control structure for the superstructure motor and only the electronic control unit 103 provides the magnitude / direction of electric energy to control the corresponding superstructure motor, signal lines can be not set).

[0072] Among them, the cable provides power for the system in the superstructure system 102 to be connected, meeting the power demand required for its operation; the signal line is used to transmit control signals, status information, etc., to realize the control and monitoring of some systems in the superstructure system 102 connected by the electronic control unit 103.

[0073] Optionally, at least one electric drive axle 100 is connected to at least one of the first system 1021, the second system 1022, and the third system 1023 in the superstructure system 102 to drive the corresponding system in the superstructure system 102 to operate; at least one electric drive axle 100 is connected to the driving system 101.

[0074] In this implementation, the electric drive axle 100 can be an element integrating components such as a motor, a reducer, and a differential, and is used to further transmit power to other systems or devices that require power, that is, the subsystem B in the superstructure system 102 and the driving system 101.

[0075] In the embodiment of the present application, the functions of the electronic control unit 103 include, for example: the electronic control unit 103 distributes electric energy to the electric drive axle 100 and the drive motor 106. And the electronic control unit 103 can be called a power distribution and control unit.

[0076] Furthermore, Figure 2 is a schematic structure of the power system of the construction machinery provided by the embodiment of the present application Figure 2 , as Figure 2 shown, the power system 104 of the construction machinery further includes one or more of a battery system 21, a power generation system assembly 22, and an external power supply interface 23

[0077] Among them, the electronic control unit 103 is respectively connected to the battery system 21, the power generation system assembly 22, and the external power supply interface 23 to supply electric energy to the electronic control unit 103.

[0078] In this implementation, the power generation system assembly 22 is a generator set. In the power generation state, the engine in the generator set converts mechanical energy into electric energy, which can make the power system always work in the high-efficiency area, that is, the oil-electricity conversion efficiency is high, and it supplies power to the battery system.

[0079] An external power supply interface 23 is provided in the power system 104 for connecting to an external power supply, enabling the construction machinery to obtain electrical energy from the outside. For example, when the construction machinery is parked for a long time or the battery system 21 has insufficient power, the battery system 21 can be charged through the external power supply to shorten the charging time or meet specific working requirements.

[0080] The battery system 21 is used to store electrical energy and provide power support for the startup, operation, and pumping operations of the construction machinery. In this embodiment, taking a hybrid construction machinery as an example, the battery system 21 is an even more crucial component for providing power.

[0081] Optionally, in the above embodiment, both the traveling system 101 and the upper structure system 102 can adopt electric drive. The power source of the traveling system 101: one or both of the power battery or the electricity generated by the generator set drive; the power source of the upper structure system 102: the power battery or the electricity generated by the generator set, external commercial power / mobile power source.

[0082] It should be understood that the two modes of traveling and upper structure of the construction machinery are mutually exclusive. To streamline the system structure and make full use of the motor function, the traveling motor can be combined with the upper structure operation execution system. By providing electric drive or not, the decoupling of traveling and upper structure can be achieved, enabling it to meet the traveling or upper structure operation requirements of the construction machinery, saving layout space, and achieving cost reduction and efficiency improvement for the whole machine.

[0083] The power system of the construction machinery provided by the embodiment of the present application includes: at least one electric drive axle, a traveling system, an upper structure system, a drive motor, and an electronic control unit; the electronic control unit is respectively connected to the electric drive axle and the drive motor; the upper structure system includes a first system, a second system, and a third system; the drive motor is connected to at least one of the first system, the second system, and the third system in the upper structure system; the electric drive axle is connected to at least one of the first system, the second system, and the third system in the upper structure system, and the electric drive axle is connected to the traveling system. In this solution, the power system realizes the output of electrical energy and operation drive through the connection of the electronic control unit with the electric drive axle and the drive motor, and the association of the electric drive axle with the traveling system and the upper structure system. By integrating the connection relationship of components such as the electronic control unit and the electric drive axle, the system structure is simplified, and unnecessary hardware configurations are reduced; at the same time, the reasonable connection method makes the control logic clearer, reducing the control difficulty and cost.

[0084] It should be understood that in the following schematic diagrams of the power system 104, they can all include other units connected in a similar manner to Figure 2 the battery system 21, the power generation system assembly 22, and the external power supply interface 23.

[0085] Optionally, in each of the embodiments involved in the present application, there are the following possible implementation manners of the first system, the second system, and the third system in the power system:

[0086] Example 1: The first system 1021 is a pumping system, the second system 1022 is an auxiliary drive system, and the third system 1023 is a boom system;

[0087] Example 2: The first system 1021 is an auxiliary drive system, the second system 1022 is a pumping system, and the third system 1023 is a boom system;

[0088] Example 3: The first system 1021 is a pumping system, the second system 1022 is a boom system, and the third system 1023 is an auxiliary drive system;

[0089] Example 4: The first system 1021 is a boom system, the second system 1022 is a pumping system, and the third system 1023 is an auxiliary drive system;

[0090] Example 5: The first system 1021 is a boom system, the second system 1022 is an auxiliary drive system, and the third system 1023 is a pumping system;

[0091] Example 6: The first system 1021 is an auxiliary drive system, the second system 1022 is a boom system, and the third system 1023 is a pumping system.

[0092] The examples in the following embodiments are described with any one of the examples.

[0093] Based on the above embodiments, the number of the electric drive axles 100 is one; the drive motor 106 is connected to the first system 1021; the electric drive axle 100 is connected to the second system 1021 and the third system 1023, then there are the following two situations:

[0094] The first kind, Figure 3 is the structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 3 , as Figure 3 shown, taking the electric drive axle 1001 as an example, the electronic control unit 103 is connected to the first system 1021;

[0095] Optionally, the electric drive axle 1001 includes two power take-off (PTO) ports. One power output port 10011 of the electric drive axle 1001 is connected to the second system 1022, and the other power output port 10012 of the electric drive axle 1001 is connected to the third system 1023;

[0096] Among them, the power output port is connected to the system in the upper mounting system 102 through a transmission shaft or other power transmission devices. This connection method can effectively transmit the mechanical energy generated by the electric drive axle 1001 to the connected system, enabling the system to work with the power of the electric drive axle 1001.

[0097] That is to say, the direct connection method can reduce the intermediate energy conversion link and improve the energy utilization efficiency. Compared with the existing method of using an independent power source to provide power for the system in the upper mounting system 102, this method avoids additional energy loss and makes the overall energy utilization of the construction machinery more reasonable.

[0098] In a possible implementation, the power output port 10011 is connected to the second system 1022 (such as a pumping system); the power output port 10012 is connected to the third system 1023 (such as an auxiliary system); correspondingly, the electronic control unit 103 is connected to the first system 1021 (such as a boom system).

[0099] Optionally, the power of the electric drive axle 1001 is output to the second system 1022 and the third system 1023 through the power output ports (i.e., 10012 and 10011).

[0100] In a possible implementation, the electric drive axle 1001 receives a control instruction sent by the electronic control unit 103 to indicate controlling the power connection between the electric drive axle 1001 and the pumping system and the auxiliary system; the actual execution is: controlling the power connection of both the power output port 10011 and the power output port 10012.

[0101] The second type Figure 4 is a schematic structure of the power system of the construction machinery provided by the embodiment of the present application Figure 4 , as Figure 4 shown. Taking the electric drive axle 1001 as an example, the drive motor 106 is connected to the first system 1021;

[0102] The electric drive axle 1001 includes a power output port 10011. The power output port 10011 of the electric drive axle 1001 is connected to the second system 1022. The second system 1022 in the upper mounting system 102 is connected to the third system 1023;

[0103] In a possible implementation, the power output port 10011 is connected to the second system 1022 (such as a pumping system); the pumping system is connected to the third system 1023 (such as a boom system); correspondingly, the electronic control unit 103 is connected to the first system 1021 (such as an auxiliary system).

[0104] The power of the electric drive axle 1001 is output to the second system 1022 through the power output port 10011; when the third system 1023 is operating, the second system 1022 transmits the power transmitted by the electric drive axle 1001 to the third system 1023.

[0105] In a possible implementation, the electric drive axle 1001 receives a control instruction sent by the electronic control unit 103 to instruct to control the disconnection of the power of the electric drive axle 1001 from the pumping system and the boom system; then the actual execution is: controlling the disconnection of the power of the power output port 10011. Furthermore, the pumping system cannot obtain power, and the boom system cannot obtain power either.

[0106] It should be understood that in this application, the subsystem A may include one or two of the pumping system, the auxiliary system, and the boom system; correspondingly, the subsystem B may include one or two of the pumping system, the auxiliary system, and the boom system.

[0107] That is to say, the first system 1021 may be any one of the pumping system, the auxiliary system, and the boom system; the second system 1022 may be any one of the pumping system, the auxiliary system, and the boom system; the third system 1023 may be any one of the pumping system, the auxiliary system, and the boom system. In one implementation, the first system 1021, the second system 1022, and the third system 1023 are all different.

[0108] In the power system of the construction machinery provided by the embodiment of the present application, the number of the electric drive axles is one; the electric drive axle is connected to two of the first system, the second system, and the third system, and the drive motor is connected to one of the first system, the second system, and the third system; the drive motor is connected to the first system; the electric drive axle includes two power output ports, one power output port of the electric drive axle is connected to the second system, and the other power output port of the electric drive axle is connected to the third system; the power of the electric drive axle is output to the second system and the third system through the power output ports; the drive motor is connected to the first system; the electric drive axle includes one power output port, the power output port of the electric drive axle is connected to the second system, and the power of the electric drive axle is output to the second system through the power output port; the second system in the upper structure system is connected to the third system; when the third system is operating, the second system transmits the power transmitted by the electric drive axle to the third system. Through the ingenious connection layout of the electric drive axle and each system, this technical solution realizes the efficient distribution and coordinated operation of power, that is, a single electric drive axle directly transmits power to the second system and the third system by virtue of multiple power output ports, reducing the power transmission links and improving the transmission efficiency; at the same time, the dual connection between the electric drive axle and the second system ensures the stable power supply, and the connection between the electronic control unit and the first system and the third system realizes the precise control and power support for the system. When the third system is operating, the second system acts as a power transmission hub to effectively conduct the power of the electric drive axle, enabling each system to cooperate closely. The overall design simplifies the structure, optimizes the power transmission path, improves the overall operation efficiency and reliability of the equipment, and meets the coordinated operation requirements under the complex working conditions of multiple systems.

[0109] Based on the above embodiment, the number of the electric drive axles 100 is one, and the drive motor 106 is respectively connected to the first system 1021 and the second system 1022, then:

[0110] Figure 5 is the structural schematic of the power system of the construction machinery provided by the embodiment of the present application Figure 5 , as Figure 5 shown, taking the electric drive axle 1001 as an example, it includes one power output 10011, and the power output port 10011 of the electric drive axle 1001 is connected to the third system 1023;

[0111] In a possible implementation, the power output port 10011 is connected to the third system 1023 (such as, the pumping system); correspondingly, the drive motor 106 is connected to the first system 1021 (such as, the boom system) and the second system 1022 (such as, the auxiliary system).

[0112] Optionally, the power of the electric drive axle 1001 is output to the third system 1023 through the power output port 10011.

[0113] In a possible implementation, the electric drive axle 1001 receives a control instruction sent by the electronic control unit 103 to indicate disconnecting the power of the electric drive axle 1001 from the pumping system. The actual execution is: controlling the power output port 10011 to be powered off, and further, the pumping system cannot obtain power.

[0114] Furthermore, the electronic control unit 103 directly controls the power transmission between the auxiliary system and the boom system to achieve the control of the boom system and the auxiliary system.

[0115] In the power system of the construction machinery provided by the embodiments of the present application, the electric drive axle includes one power output. The power output port of the electric drive axle is connected to the third system, and the power of the electric drive axle is output to the third system through the power output port. This technical solution uses an electric drive axle with a single power output port to directly connect to the third system, reducing the intermediate links of power transmission and lowering energy loss, enabling the power to be directly transmitted to the third system with higher efficiency.

[0116] Based on the above embodiments, the number of electric drive axles 100 is two; the two electric drive axles 100 include the first electric drive axle 1001 and the second electric drive axle 1002; the first electric drive axle 1001 and the second electric drive axle 1002 are connected to the first system 1021 and the second system 1022; the electronic control unit 103 is connected to the third system 1023, and then there are the following two schemes:

[0117] The first one, Figure 6 is the structural schematic diagram of the power system of the construction machinery provided by the embodiments of the present application Figure 6 , as Figure 6 shown, the first electric drive axle 1001 is connected to the first system 1021, and the second electric drive axle 1002 is connected to the second system 1022; both the first electric drive axle 1001 and the second electric drive axle 1002 are connected to the traveling system 101; the drive motor 106 is connected to the third system 1023;

[0118] In a possible implementation, the electronic control unit 103 is connected to the third system 1023 (such as, the pumping system).

[0119] The power of the first electric drive axle 1001 is output to the first system 1021 through the power output port 10011 of the first electric drive axle 1001, and the power of the second electric drive axle 1002 is output to the second system 1022 through the power output port 10021 of the second electric drive axle 1002; or, the first electric drive axle 1001 and the second electric drive axle 1002 output power to the traveling system 101.

[0120] In a possible implementation, the power output port 10011 in the first electric drive axle 1001 is connected to the first system 1021 (e.g., the boom system). When the first electric drive axle 1001 receives a control instruction to indicate disconnecting the power of the boom system, it controls the power output port 10011 to disconnect the power.

[0121] Also, the power output port 10021 in the second electric drive axle 1002 is connected to the second system 1021 (e.g., the auxiliary system). When the second electric drive axle 1002 receives a control instruction to indicate disconnecting the power of the auxiliary system, it controls the power output port 10021 to disconnect the power.

[0122] Also, the first electric drive axle 1001 can also receive a control instruction to indicate driving the operating system 101 to perform an operation, then the first electric drive axle 1001 is used for the operation of the operating system 101; the second electric drive axle 1002 can also receive a control instruction to indicate driving the operating system 101 to perform an operation, then the second electric drive axle 1002 is used for the operation of the operating system 101.

[0123] The second type Figure 7 is a schematic structure of the power system of the construction machinery provided by the embodiment of the present application Figure 7 as Figure 7 shown, the first electric drive axle 1001 is connected to the first system 1021, and the first system 1021 is connected to the second system 1022; both the first electric drive axle 1001 and the second electric drive axle 1002 are connected to the operating system 101; the drive motor 106 is connected to the third system 1023;

[0124] In a possible implementation, the electronic control unit 103 is connected to the third system 1023 (e.g., the pumping system).

[0125] The power of the first electric drive axle 1001 is output to the first system 1021 through the power output port 10011 of the first electric drive axle 1001; or, the power of the first electric drive axle 1001 is output to the operating system 101; when the second system 1022 needs to perform an operation, the first system 1021 transmits the power transmitted by the first electric drive axle 1001 to the second system 1022; the second electric drive axle 1002 is used to output power to the operating system 101.

[0126] In a possible implementation, the power output port 10011 in the first electric drive axle 1001 is connected to the first system 1021 (e.g., the boom system). When the first electric drive axle 1001 receives a control instruction to indicate disconnecting the power of the boom system, it controls the power output port 10011 to disconnect the power. Correspondingly, both the boom system and the second system 1022 (e.g., the auxiliary system) lose power.

[0127] In addition, the first electric drive axle 1001 can also receive a control instruction to direct the running system 101 to perform an operation, and then the first electric drive axle 1001 is used to drive the operation of the running system 101; the second electric drive axle 1002 can also receive a control instruction to direct the running system 101 to perform an operation, and then the second electric drive axle 1002 is used to drive the operation of the running system 101.

[0128] It should be understood that in actual implementation, the first electric drive axle 1001 and the second electric drive axle 1002 can both be connected to the running system 101 separately or jointly; the electric drive axle for specifically driving the operation of the running system 101 can be determined based on the control instruction sent by the electronic control unit 103.

[0129] In the power system of the construction machinery provided by the embodiments of the present application, the number of at least one electric drive axle is two; the two electric drive axles include a first electric drive axle and a second electric drive axle; the first electric drive axle and the second electric drive axle are connected to the first system and the second system; the drive motor is connected to the third system. In this embodiment, 2 electric drive axles are used, which reduces the additional cost, and each electric drive axle can have a PTO port to mount one system in the upper mounting system to achieve the control and operation of the corresponding system.

[0130] Figure 8 Structural schematic of the power system of the construction machinery provided by the embodiments of the present application Figure 8 , such as Figure 8 shown, the number of electric drive axles 100 is two; the two electric drive axles 100 include a first electric drive axle 1001 and a second electric drive axle 1002.

[0131] Optionally, the first electric drive axle 1001 is connected to the first system 1021; both the first electric drive axle 1001 and the second electric drive axle 1002 are connected to the running system 101;

[0132] In a possible implementation, the first electric drive axle 1001 is connected to the first system 1021 (such as a pumping system) in the upper mounting system.

[0133] The drive motor 106 is respectively connected to the second system 1022 and the third system 1023; the power of the first electric drive axle 1001 is output to the first system 1021 through the power output port of the first electric drive axle 1001; alternatively, the power of the first electric drive axle 1001 is output to the running system 101; the second electric drive axle 1002 is used to output power to the running system 101.

[0134] In a possible implementation, the drive motor 106 is respectively connected to the second system 1022 (such as an auxiliary system) and the third system 1023 (such as a boom system) in the upper mounting system 102.

[0135] Moreover, when the first electric drive axle 1001 receives a control instruction from the electronic control unit 103 to indicate that the pumping system stops operating, the first electric drive axle controls the power at the power output port 10011 to be disconnected; when the control instruction also indicates that the driving system 101 operates, the first electric drive axle 1001 drives the operation of the driving system 101.

[0136] Moreover, when the second electric drive axle 1002 receives a control instruction from the electronic control unit 103 to indicate that the driving system 101 operates, the second electric drive axle 1002 drives the operation of the driving system 101.

[0137] In the power system of the construction machinery provided by the embodiment of the present application, the number of electric drive axles is two; the two electric drive axles include a first electric drive axle and a second electric drive axle, and the first electric drive axle is connected to the first system; both the first electric drive axle and the second electric drive axle are connected to the driving system, and the drive motors are respectively connected to the second system and the third system; the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; alternatively, the power of the first electric drive axle is output to the driving system; the second electric drive axle is used to output power to the driving system. Through the connection design of the dual electric drive axles and multiple systems, this technical solution constructs a flexible and efficient power transmission system, that is, the two electric drive axles cooperate with each other. The first electric drive axle can accurately supply energy to the first system to ensure its stable operation, and can also switch to provide power for the driving system to enhance the flexibility of power allocation of the equipment; the second electric drive axle focuses on outputting power to the driving system, and the dual-source power input greatly improves the power performance and reliability of the driving system.

[0138] Figure 9 is a structural schematic diagram of the power system of the construction machinery provided by the embodiment of the present application Figure 9 , as Figure 9 shown, the number of at least one electric drive axle 100 is three; at least one electric drive axle 100 includes a first electric drive axle 1001, a second electric drive axle 1002, and a third electric drive axle 1003;

[0139] Optionally, the first electric drive axle 1001 is connected to the first system 1021 in the upper mounting system 102, and the second electric drive axle 1002 is connected to the second system 1022 in the upper mounting system 102; both the second electric drive axle 1002 and the third electric drive axle 1003 are connected to the driving system 101;

[0140] The drive motor 106 is connected to the third system 1023 in the upper mounting system 102.

[0141] In a possible implementation, the first electric drive axle 1001 is connected to the first system 1021 (such as an auxiliary system) in the upper body system 102, the second electric drive axle 1002 is connected to the second system 1022 (such as a pumping system) in the upper body system 102; the drive motor 106 is connected to the third system 1023 (such as a boom system) in the upper body system 102.

[0142] Optionally, the first electric drive axle 1001 is used to control the power on / off of the power output port 10011 in the first electric drive axle 1001, so as to control the power on / off between the first electric drive axle 1001 and the first system 1021; the second electric drive axle 1002 is used to control the power on / off of the power output port 10021 in the second electric drive axle 1002, so as to control the power on / off between the second electric drive axle 1002 and the second system 1022; it is also used for the operation of the electric drive system 101; the third electric drive axle 1003 is used for the operation of the electric drive system 101.

[0143] In a possible implementation, when the first electric drive axle 1001 receives a control instruction from the electronic control unit 103 to indicate that the auxiliary system stops operating, the first electric drive axle 1001 controls the power of the power output port 10011 to be disconnected; when the second electric drive axle 1002 receives a control instruction from the electronic control unit 103, and this control instruction indicates that the pumping system stops operating, the second electric drive axle controls the power of the power output port 10021 to be disconnected; when the third electric drive axle 1003 receives a control instruction from the electronic control unit 103 to indicate that the driving system stops operating, the third electric drive axle 1003 stops supplying power to the driving system.

[0144] The power system of the construction machinery provided by the embodiment of the present application has at least one electric drive axle, and the number of at least one electric drive axle is three; at least one electric drive axle includes a first electric drive axle, a second electric drive axle, and a third electric drive axle; the first electric drive axle is connected to the first system in the superstructure system, and the second electric drive axle is connected to the second system in the superstructure system; both the second electric drive axle and the third electric drive axle are connected to the traveling system; the drive motor is connected to the third system in the superstructure system; the first electric drive axle is used to control the power on / off of the power output port in the first electric drive axle to control the power on / off between the first electric drive axle and the first system; the second electric drive axle is used to control the power on / off of the power output port in the second electric drive axle to control the power on / off between the second electric drive axle and the second system; it is also used for the operation of the electric drive traveling system; the third electric drive axle is used for the operation of the electric drive traveling system. In this technical solution, three electric drive axles are provided, which significantly improves the flexibility and accuracy of power distribution compared with the structure of the traditional construction machinery power system. That is, the first electric drive axle can independently control the power on / off with the first system in the superstructure system to achieve precise start and stop of the operation of this system; the second electric drive axle can not only control the power connection with the second system in the superstructure system, but also jointly provide power for the traveling system with the third electric drive axle to ensure the stability of vehicle travel and power output; at the same time, the electronic control unit specifically supplies power to the third system in the superstructure system to optimize the power distribution.

[0145] Figure 10 is a schematic structural diagram of the construction machinery provided by the embodiment of the present application, as Figure 10 shown, the construction machinery 105 includes: the power system 104 in the above embodiment.

[0146] Among them, the construction machinery 105 can be a concrete pump truck, etc.

[0147] The construction machinery provided by the embodiment of the present application has the same implementation principle and technical effect as the above embodiment, and will not be elaborated here.

[0148] It should be understood that the method embodiment is applied to the electronic control unit 103 in the above power system.

[0149] Figure 11 is a schematic diagram of the control method of the construction machinery provided by the embodiment of the present application, as Figure 11 shown, the control method of the construction machinery includes the following steps:

[0150] Step 111, control the operation of the electric drive axle and / or the drive motor in the power system to drive the operation of the superstructure system or / and the traveling system in the construction machinery.

[0151] In this step, in response to the working mode of the construction machinery input by a user (which can be a driver, an operator of construction machinery, etc.), the electronic control unit generates a control instruction for this working mode and sends the control instruction to the electric drive axle and / or drive motor in the construction machinery, so that the electric drive axle and / or drive motor drive the operation of the upper mounting system and / or the traveling system in the construction machinery.

[0152] Optionally, the working mode of the construction machinery can be a traveling mode, a waiting-for-material working mode, a pumping mode, etc.

[0153] In a possible implementation manner, the control instruction for controlling the electric drive axle and / or drive motor in the power system in step 111 may include the following situations (for the convenience of description, an example is given with the Figure 6 structure as an example, and it is preset that the first system 1021 is the boom system, the second system 1022 is the pumping system, and the third system 1023 is the auxiliary system):

[0154] The first type, the working mode is the traveling mode, then the control instruction is used to indicate that the power output at the power output port in the electric drive axle is disconnected and the electric drive axle is connected to the traveling system;

[0155] In this implementation, since the traveling mode requires pausing the operation of the upper mounting system, at this time, it is possible to control the power output at the power output port 10011 and the power output port 10021 to be disconnected, so that the boom system and the pumping system stop operating. At the same time, it is also possible to control the electronic control unit 103 to disconnect the electric drive from the auxiliary system; the first electric drive axle 1001 or / and the second electric drive axle 1002 are used to drive the traveling system.

[0156] It should be understood that if there is a connection between the power output port in the electric drive axle and the auxiliary system, then in the traveling mode of loading materials, this power output port can be in a power-on state.

[0157] The second type, the working mode is the pumping mode, then the control instruction is used to indicate that the power output at the power output port in the electric drive axle is connected and the electric drive axle is disconnected from the traveling system.

[0158] In this implementation, since there are multiple operations in the pumping mode, that is, it can be: pure pumping operation, pumping and boom operation, pure boom operation, and waiting-for-material work.

[0159] Correspondingly, this implementation can be: based on the target operation in the pumping mode, determining the target power take-off system corresponding to the target operation in the mapping relationship;

[0160] Among them, the mapping relationship records at least one operation in the pumping mode and the power take-off system corresponding to each operation. The corresponding power take-off system includes at least one item: the first system, the second system, and the third system.

[0161] Exemplarily, in Figure 6 the structure shown, the mapping relationship may be at least one of the following:

[0162] 1), pure pumping operation, the power take-off system includes: the second system 1022;

[0163] 2), pumping and boom operation, the power take-off system includes: the first system 1021, the second system 1022, the third system 1023;

[0164] 3) pure boom (or outrigger) operation, the power take-off system includes: the first system 1021;

[0165] 4) standby operation, the power take-off system includes: the third system 1023.

[0166] Exemplarily, in Figure 5 the structure shown, the mapping relationship may be at least one of the following:

[0167] 1), pure pumping operation, the power take-off system includes: the third system 1023;

[0168] 2), pumping and boom operation, the power take-off system includes: the first system 1021, the second system 1022, the third system 1023;

[0169] 3) pure boom (or outrigger) operation, the power take-off system includes: the first system 1021;

[0170] 4) standby operation (mode), the power take-off system includes: the second system 1022.

[0171] Further, after determining the target power take-off system, control the power related to the target power take-off system to be turned on and the power related to the non-target power take-off system to be turned off.

[0172] It should be understood 1: The above mapping relationship follows the following principles: For pure pumping operation, the power take-off system is the pumping system; for pumping and boom operation, the power take-off system is the pumping system, the boom system and the auxiliary system; for pure boom operation, the power take-off system is the boom system; for standby operation, the power take-off system is the auxiliary system.

[0173] It should be understood 2: In actual implementation, based on the different structures of the power system, the power take-off systems are also different. The mapping relationship can be preset in the electronic control unit. When obtaining the control instruction of the vehicle controller, based on the different operations of the pumping mode, the power take-off systems are also different, so that the control of the power (i.e., related to the electric drive axle or the third system) to be turned on and off is also different. Its implementation is similar to that of this Figure 5 、 Figure 6 and will not be elaborated here.

[0174] In addition, in the non-driving mode, the power supply of the driving system by the electric drive axle can be directly disconnected, that is, the power supply for the driving mode is disconnected.

[0175] Optionally, the method may further include:

[0176] 1), if it is detected that the required power of the electric drive axle is greater than the power supply of the battery system, control the power generation system assembly to generate electricity;

[0177] In this implementation, it is detected that the battery system cannot provide the corresponding required power for the electric drive axle. At this time, the power generation system assembly is used to supply power, that is, it can be realized to supply power in parallel with the battery power source in the battery system through the power distribution and control unit.

[0178] 2), if it is detected that the required power of the electric drive axle is less than or equal to the power supply of the battery system, control the power generation system assembly to stop generating electricity;

[0179] In this implementation, it is detected that the battery system can provide the corresponding required power for the electric drive axle. At this time, the power generation system assembly is stopped from supplying power.

[0180] 3), if it is detected that the battery level value of the battery system is lower than the battery level threshold, control the power generation system assembly to supply power to the electric drive axle and / or charge the battery system.

[0181] In this implementation, when it is detected that the battery level value of the battery system is lower than the battery level threshold, it indicates that the battery system needs to be charged and the battery system needs to be protected. Since the power system also includes a power generation system assembly, at this time, the power generation system assembly can be controlled to supply power to the electric drive axle and / or charge the battery system.

[0182] Among them, the charging implementation (charging the battery system) and the operation implementation (supplying power to the electric drive axle and / or the third system 1023) are determined based on the actual situation.

[0183] The control method of the construction machinery provided by the embodiment of the present application is applied to the electronic control unit in the above power system, and controls the operation of the electric drive axle and / or the drive motor in the power system to drive the operation of the upper mounting system or / and the driving system in the construction machinery. In this technical solution, the electronic control unit realizes precise driving of the operation of the upper mounting system or the driving system of the construction machinery by controlling the electric drive axle and / or the drive motor, effectively improving the convenience and efficiency of the power system control, and greatly optimizing the overall operation performance of the construction machinery.

[0184] Figure 12 It is a schematic structural diagram of the control device of the construction machinery provided by the embodiment of the present application. As Figure 12 shown, the device is applied to the electronic control unit 103 in the power system and includes:

[0185] The control module 121 controls the operation of the electric drive axle and / or the drive motor in the power system to drive the operation of the upper mounting system and / or the traveling system in the construction machinery.

[0186] In a possible implementation manner, the control instruction for controlling the operation of the electric drive axle and / or the drive motor in the power system is generated according to the working mode of the construction machinery input by the user;

[0187] If the working mode is the traveling mode, the control instruction is used to indicate the disconnection of the power at the power output port in the electric drive axle and the connection of the electric drive axle to the traveling system;

[0188] If the working mode is the pumping mode, the control instruction is used to indicate the connection of the power at the power output port in the electric drive axle and the disconnection of the electric drive axle from the traveling system.

[0189] In a possible implementation manner, the control module 121 is further configured to:

[0190] If it is detected that the required power of the electric drive axle is greater than the power supply power of the battery system, control the power generation system assembly to generate electricity;

[0191] If it is detected that the required power of the electric drive axle is less than or equal to the power supply power of the battery system, control the power generation system assembly to stop generating electricity;

[0192] If it is detected that the battery level value of the battery system is lower than the power level threshold, control the power generation system assembly to provide power supply to the electric drive axle and / or charge the battery system.

[0193] The control device of the construction machinery provided by the embodiments of the present application can be used to execute the control method of the construction machinery in any of the foregoing embodiments, and its implementation principle and technical effects are similar, and will not be elaborated here.

[0194] Figure 13 FIG. is a schematic structural diagram of an electronic control unit provided by an embodiment of the present application. As Figure 13 shown, the electronic control unit 103 may include: a processor 131, a memory 132, and computer program instructions stored on the memory 132 and executable on the processor 131. When the processor 131 executes the computer program instructions, the method provided in any of the foregoing embodiments is implemented.

[0195] Optionally, the various components of the electronic control unit 103 may be connected through a system bus.

[0196] The memory 132 may be a separate storage unit or a storage unit integrated in the processor 131. The number of processors 131 is one or more.

[0197] It should be understood that the processor 131 may be a central processing unit (CPU), or may also be other general-purpose processors 131, digital signal processors 131 (DSPs), application specific integrated circuits (ASICs), etc. The general-purpose processor 131 may be a microprocessor 131 or the processor 131 may also be any conventional processor 131, etc. The steps of the method disclosed in combination with this application can be directly implemented by the execution of the hardware processor 131, or can be implemented by a combination of hardware and software modules in the processor 131.

[0198] The system bus may be a peripheral component interconnect (PCI) bus, an extended industry standard architecture (EISA) bus, or the like. The system bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, only a thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. The memory 132 may include a random access memory 132 (RAM), and may also include a non-volatile memory 132 (NVM), such as at least one disk memory 132.

[0199] All or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions. The foregoing program can be stored in a readable memory 132. When the program is executed, it executes the steps including the above method embodiments; and the foregoing memory 132 (storage medium) includes: read-only memory 132 (ROM), RAM, flash memory 132, hard disk, solid state drive, magnetic tape, floppy disk, optical disc, and any combination thereof.

[0200] The electronic control unit provided in the embodiments of this application can be used to execute the method provided in any of the above method embodiments. The implementation principles and technical effects are similar and will not be elaborated here.

[0201] The embodiments of this application provide a computer-readable storage medium. Computer instructions are stored in the computer-readable storage medium. When the computer instructions run on a computer, the computer is caused to execute the above method.

[0202] The above-mentioned computer-readable storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory, electrically erasable programmable read-only memory, erasable programmable read-only memory, programmable read-only memory, read-only memory, magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium may be any available medium accessible by a general-purpose or special-purpose computer.

[0203] Optionally, the readable storage medium is coupled to the processor, so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium may also be a component of the processor. The processor and the readable storage medium may be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium may also exist as discrete components in the device.

[0204] The embodiment of the present application further provides a computer program product, which includes a computer program stored in a computer-readable storage medium. At least one processor can read the computer program from the computer-readable storage medium, and when the at least one processor executes the computer program, the above-mentioned method can be implemented.

[0205] Finally, it should be noted that: After considering the specification and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present invention. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. It is not limited to the exact structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A power system of a construction machinery, characterized in that, The described power system includes: at least one electric drive axle, a running system, an upper mounting system, a drive motor, and an electronic control unit; the electronic control unit is respectively connected to the electric drive axle and the drive motor; the upper mounting system includes a first system, a second system, and a third system; The drive motor is connected to at least one of the first system, the second system, and the third system in the upper mounting system; The electric drive axle is connected to at least one of the first system, the second system, and the third system in the upper mounting system, and the electric drive axle is connected to the running system.

2. The power system according to claim 1, characterized in that, The number of the electric drive axles is one; The drive motor is connected to the first system; the electric drive axle is connected to the second system and the third system.

3. The power system according to claim 2, wherein The electric drive axle includes two power output ports; One power output port of the electric drive axle is connected to the second system, and the other power output port of the electric drive axle is connected to the third system; the power of the electric drive axle is output to the second system and the third system through the power output ports.

4. The power system according to claim 2, wherein The electric drive axle includes one power output port; The power output port of the electric drive axle is connected to the second system, and the power of the electric drive axle is output to the second system through the power output port; the second system in the upper mounting system is connected to the third system; when the third system is operating, the second system transmits the power transmitted by the electric drive axle to the third system.

5. The power system according to claim 1, characterized in that, The number of the electric drive axles is one; The drive motor is respectively connected to the first system and the second system; the electric drive axle includes one power output port, the power output port of the electric drive axle is connected to the third system, and the power of the electric drive axle is output to the third system through the power output port.

6. The power system according to claim 1, wherein The number of the electric drive axles is two; the two electric drive axles include a first electric drive axle and a second electric drive axle; The first electric drive axle and the second electric drive axle are connected to the first system and the second system; the drive motor is connected to the third system.

7. The power system according to claim 6, characterized in that, The first electric drive axle is connected to the first system, and the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; the second electric drive axle is connected to the second system, and the power of the second electric drive axle is output to the second system through the power output port of the second electric drive axle; Both the first electric drive axle and the second electric drive axle are connected to the running system.

8. The power system according to claim 6, wherein The first electric drive axle is connected to the first system, and the first system is connected to the second system; the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; when the second system needs to operate, the first system transmits the power transmitted by the first electric drive axle to the second system; Both the first electric drive axle and the second electric drive axle are connected to the running system.

9. The power system according to claim 1, characterized in that, The number of the electric drive axles is two; the two electric drive axles include a first electric drive axle and a second electric drive axle; The first electric drive axle is connected to the first system, and the power of the first electric drive axle is output to the first system through the power output port of the first electric drive axle; both the first electric drive axle and the second electric drive axle are connected to the driving system; The drive motor is respectively connected to the second system and the third system.

10. The power system according to any one of claims 1-9, characterized in that, The first system is a pumping system, the second system is an auxiliary drive system, and the third system is a boom system; Or, the first system is an auxiliary drive system, the second system is a pumping system, and the third system is a boom system; Or, the first system is a pumping system, the second system is a boom system, and the third system is an auxiliary drive system; Or, the first system is a boom system, the second system is a pumping system, and the third system is an auxiliary drive system; Or, the first system is a boom system, the second system is an auxiliary drive system, and the third system is a pumping system; Or, the first system is an auxiliary drive system, the second system is a boom system, and the third system is a pumping system.

11. The power system according to any one of claims 1-9, characterized in that, The power system further includes one or more of: a battery system, a power generation system assembly, and an external power supply interface: Wherein, the battery system, the power generation system assembly, and the external power supply interface are respectively connected to the electronic control unit to supply electric energy to the electronic control unit.

12. An engineering machinery, characterized in that, The construction machinery is provided with the power system of the construction machinery according to any one of claims 1-11.

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