Construction machine and method for lubricating the same

Abstract

This invention relates to the field of hydraulic control, and discloses a lubricating oil filling system, method, and engineering machinery. The system includes: a lubricating oil tank, a lubricating oil filling device, a hydraulic device, an oil reversing device, and a control device. The control device acquires the filling oil pressure at the lubricating oil filling port, controls whether the hydraulic device delivers hydraulic oil to the hydraulic circuit based on the filling oil pressure, and controls the oil reversing device to reverse the flow based on the filling oil pressure, thereby determining whether to deliver hydraulic oil to the lubricating oil filling device. The lubricating oil filling device then injects lubricating oil into the lubrication point. This achieves intelligent adaptive control of lubricating oil filling, requiring no manual operation, avoiding mechanical wear caused by forgetting to add lubricating oil due to human error or other factors, and enhancing the reliability of the engineering machinery.

Description

Technical Field

[0001] This invention relates to the field of hydraulic control, and more specifically, to a lubricating oil filling system, method, and engineering machinery. Background Technology

[0002] Currently, construction machinery requires regular lubrication of its moving friction pairs to reduce wear and extend equipment life. However, lubrication is primarily done manually, requiring operators to add lubricant weekly or even daily. This traditional method of manually injecting lubricant with a lubricating gun is labor-intensive, inconvenient in rainy weather, and can lead to mechanical wear and reduced machinery lifespan if operators forget to do so. Therefore, a system that intelligently and adaptively adds lubricant without manual intervention is needed to dynamically replenish the oil. Summary of the Invention

[0003] The purpose of this invention is to overcome the problem that the lubrication oil filling process of existing engineering machinery requires manual operation, which is inconvenient and results in untimely lubrication. This invention provides a lubrication oil filling system, method, and engineering machinery.

[0004] To achieve the above objectives, the first aspect of this application provides a lubricating oil filling system for engineering machinery, the system comprising:

[0005] A lubricating oil tank is used to store lubricating oil.

[0006] The lubricating oil filling device is connected to the lubricating oil tank through a lubricating oil circuit. The lubricating oil filling device includes a lubricating oil filling port, which is used to inject lubricating oil into the lubrication point. The lubricating oil filling port is equipped with a pressure sensor, which is used to detect the filling oil pressure at the lubricating oil filling port.

[0007] The hydraulic device is connected to the lubricating oil filling device through a hydraulic circuit. The hydraulic circuit is equipped with an oil reversing device, and the hydraulic device is used to deliver hydraulic oil to the oil reversing device.

[0008] The control device, communicatively connected to the pressure sensor and electrically connected to the hydraulic reversing device, is used to acquire the filling oil pressure and, based on the filling oil pressure, control whether the hydraulic device supplies hydraulic oil to the hydraulic reversing device; and

[0009] The hydraulic pressure control device reverses the flow of hydraulic oil to control whether hydraulic oil is delivered to the lubricating oil filling device.

[0010] In one embodiment of this application, the lubricating oil filling device includes:

[0011] The master cylinder is connected to the hydraulic reversing device via a hydraulic circuit.

[0012] The auxiliary cylinder is rigidly connected to the main cylinder via a cylinder rod. The auxiliary cylinder includes an oil suction chamber and an oil pumping chamber. The oil pumping chamber includes a lubricating oil filling port. The oil suction chamber is connected to the lubricating oil tank via a first check valve. The oil pumping chamber is connected to the oil suction chamber via a second check valve mounted on the cylinder rod. The first check valve opens to the oil suction chamber, and the second check valve opens to the oil pumping chamber.

[0013] Multiple filling check valves are connected to the pump oil chamber through a lubrication oil circuit. The filling check valves guide the lubrication points to deliver lubricating oil to the lubrication points.

[0014] In one embodiment of this application, the hydraulic switching device includes a first solenoid switching valve and a second solenoid switching valve. The first solenoid switching valve includes a first oil outlet position. When the first solenoid switching valve switches to the first oil outlet position and connects with the hydraulic circuit, the hydraulic oil in the hydraulic circuit is delivered to the second solenoid switching valve.

[0015] The first electromagnetic reversing valve is used to receive the first reversing control command output by the control device and to reverse according to the first reversing control command.

[0016] The second solenoid directional valve includes a second oil outlet position. When the second solenoid directional valve switches to the second oil outlet position and connects with the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit is delivered to the master cylinder and pushes the cylinder rod to move.

[0017] The second electromagnetic reversing valve is used to receive the second reversing control command output by the control device and to reverse according to the second reversing control command;

[0018] The first commutation control command is a DC current signal, and the second commutation control command is a sinusoidal current signal.

[0019] In one embodiment of this application, the hydraulic device includes:

[0020] Hydraulic oil tank, used to store hydraulic oil;

[0021] The hydraulic pump, connected to the hydraulic oil tank via a hydraulic oil circuit, is used to pump hydraulic oil to the oil reversing device.

[0022] The electric motor, electrically connected to the hydraulic pump, is used to receive control commands from the control device and, based on the control commands, to control whether the hydraulic pump delivers hydraulic oil to the oil reversing device.

[0023] In one embodiment of this application, the hydraulic pump is a fixed displacement pump.

[0024] In one embodiment of this application, the control device includes:

[0025] The oil pressure detection unit is connected in communication with the pressure sensor to obtain the filling oil pressure at the lubricating oil filling port and generate a pressure value signal based on the filling oil pressure.

[0026] The delivery control unit is electrically connected to the hydraulic device. It is used to acquire pressure value signals and generate delivery control commands based on the pressure value signals. The delivery control commands are then output to the hydraulic device to control whether the hydraulic device delivers hydraulic oil to the oil reversing device.

[0027] The reversing control unit is electrically connected to the oil reversing device. It is used to acquire pressure value signals, generate reversing control commands based on the pressure value signals, and output the reversing control commands to the oil reversing device to control the reversing of the oil reversing device.

[0028] In one embodiment of this application, the oil pressure detection unit includes a digital-to-analog converter for converting the filling oil pressure, which is a digital signal, into a pressure value signal, which is an analog signal.

[0029] A second aspect of this application provides an engineering machine, characterized in that it includes the system described above.

[0030] A third aspect of this application provides a lubricating oil filling method applied to the aforementioned system, the method comprising:

[0031] The control device obtains the filling oil pressure at the lubricating oil filling port and controls whether the hydraulic device delivers hydraulic oil to the oil reversing device based on the filling oil pressure.

[0032] The hydraulic pressure control oil reversing device is used to control whether hydraulic oil is delivered to the lubricating oil filling device.

[0033] Lubricating oil is injected into the lubrication points through a lubrication oil filling device.

[0034] A fourth aspect of this application provides a machine-readable storage medium, characterized in that the machine-readable storage medium stores instructions that, when executed by a processor, cause the processor to perform the aforementioned lubricating oil filling method.

[0035] Through the above technical solution, the control device intelligently detects the oil pressure at the lubricating oil filling port, and controls the hydraulic device, oil reversing device, and lubricating oil filling device to work together to dynamically replenish oil based on the oil pressure. This achieves intelligent adaptive control of lubricating oil filling without any manual operation, avoiding mechanical wear caused by forgetting to add lubricating oil due to human factors, and enhancing the reliability of construction machinery. Furthermore, the above technical method for lubricating oil filling is more efficient and has a better lubrication effect than manual filling.

[0036] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0037] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0038] Figure 1 This illustration schematically shows a structural diagram of a lubricating oil filling system according to an embodiment of this application;

[0039] Figure 2 The schematic diagram illustrates the structure of a lubricating oil filling device according to an embodiment of this application;

[0040] Figure 3 A flowchart illustrating a lubricating oil filling method according to an embodiment of this application is shown schematically; and

[0041] Figure 4 The schematic diagram illustrates the hydraulic transmission process of a lubricating oil filling system according to an embodiment of this application. Detailed Implementation

[0042] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0043] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and reversal of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0045] Figure 1 This illustration schematically shows a structural diagram of a system for calculating design parameters of a device according to an embodiment of this application. Figure 2 This schematic diagram illustrates the structure of a lubricating oil filling device 200 according to an embodiment of this application. Please refer to it as well. Figure 1 and Figure 2 In one embodiment of this application, a lubricating oil filling system is provided, which may include:

[0046] Lubricating oil tank 100 is used to store lubricating oil;

[0047] The lubricating oil filling device 200 is connected to the lubricating oil tank 100 through a lubricating oil circuit. The lubricating oil filling device 200 includes a lubricating oil filling port 270, which is used to inject lubricating oil into the lubrication point. The lubricating oil filling port 270 is equipped with a pressure sensor, which is used to detect the filling oil pressure of the lubricating oil filling port 270.

[0048] The hydraulic device 300 is connected to the lubricating oil filling device 200 through a hydraulic oil circuit. The hydraulic oil circuit is equipped with an oil reversing device 400. The hydraulic device 300 is used to deliver hydraulic oil to the oil reversing device 400.

[0049] The control device 500, communicatively connected to the pressure sensor and electrically connected to the hydraulic reversing device 400, is used to acquire the filling oil pressure and control whether the hydraulic device 300 supplies hydraulic oil to the hydraulic reversing device 400 based on the filling oil pressure; and

[0050] The hydraulic pressure control device 400 is switched to control whether the hydraulic oil is delivered to the lubricating oil filling device 200.

[0051] The lubricating oil tank 100 stores lubricating oil for mechanical lubrication and is connected to the lubricating oil filling device 200 via a lubricating oil circuit. The lubricating oil filling port 270 in the lubricating oil filling device 200 is used to inject lubricating oil into the lubrication points, that is, into the various moving friction pairs of the construction machinery. The filling oil pressure of the lubricating oil filling port 270 represents the oil pressure at the end of the entire system, that is, the lubrication section facing the construction machinery. The magnitude of this oil pressure determines whether the system needs to replenish lubricating oil at the lubricating oil filling port 270 to maintain the stability of the oil pressure at the end of the entire system, that is, to ensure that the moving friction pairs of the construction machinery have sufficient lubricating oil for lubrication. Therefore, the lubricating oil filling port 270 is equipped with a pressure sensor to detect the filling oil pressure of the lubricating oil filling port 270.

[0052] The lubricating oil filling system provided in this embodiment uses hydraulic transmission to control the lubricating oil filling device 200 to fill the lubricating oil. The hydraulic device 300 is connected to the lubricating oil filling device 200 through a hydraulic oil circuit. Specifically, the hydraulic oil circuit is equipped with an oil reversing device 400. The hydraulic device 300 is used to deliver hydraulic oil to the oil reversing device 400 to perform the hydraulic transmission process.

[0053] The control device 500 is a device used to control the hydraulic transmission process of the entire system according to the filling oil pressure. It is communicatively connected to the pressure sensor of the lubricating oil filling port 270 to obtain the filling oil pressure and control the hydraulic transmission process of the entire system, including: controlling the oil reversing device 400 to reverse (i.e. determining whether hydraulic oil can enter the lubricating oil filling device 200) and controlling whether the hydraulic device 300 delivers hydraulic oil to the oil reversing device 400.

[0054] In one embodiment of this application, the lubricating oil filling device 200 includes:

[0055] The main cylinder 210 is connected to the hydraulic reversing device 400 via a hydraulic circuit;

[0056] The auxiliary cylinder 220 is rigidly connected to the main cylinder 210 via the cylinder rod 230. The auxiliary cylinder 220 includes an oil suction chamber 221 and an oil pumping chamber 222. The oil pumping chamber 222 includes a lubricating oil filling port 270. The oil suction chamber 221 is connected to the lubricating oil tank 100 via a first check valve 240. The oil pumping chamber 222 communicates with the oil suction chamber 221 via a second check valve 250 mounted on the cylinder rod 230. Specifically, the first check valve 240 opens to the oil suction chamber 221, and the second check valve 250 opens to the oil pumping chamber 222.

[0057] Multiple filling check valves 260 are provided, which are connected to the lubrication points and connected to the pump oil chamber 222 through the lubrication oil circuit, and are used to deliver lubricating oil to the lubrication points.

[0058] The lubricating oil filling device 200 includes a main cylinder 210 and an auxiliary cylinder 220. The main cylinder 210 and the auxiliary cylinder 220 are rigidly connected by a cylinder rod 230. The main cylinder 210 is connected to the oil reversing device 400 through a hydraulic oil circuit. That is, the hydraulic oil delivered to the lubricating oil filling device 200 by the oil reversing device 400 directly enters the main cylinder 210, and the hydraulic oil discharged from the main cylinder 210 can also directly enter the oil reversing device 400, so that the piston rod in the main cylinder 210 performs reciprocating motion to adapt to changes in oil pressure.

[0059] The reciprocating motion of the cylinder rod 230 in the main cylinder 210, caused by the change in hydraulic oil pressure, drives the portion of the cylinder rod 230 located in the auxiliary cylinder 220 to perform the same reciprocating motion. This causes a change in pressure between the oil suction chamber 221 and the pump oil chamber 222 in the auxiliary cylinder 220. As a result, the change in pressure in the oil suction chamber 221 allows it to draw lubricating oil from the lubricating oil tank 100 through the first one-way valve 240. The first one-way valve 240 opens the oil suction chamber 221, ensuring that the lubricating oil only flows into the oil suction chamber 221 and does not flow back into the lubricating oil tank 100.

[0060] The oil pump chamber 222 includes a lubricating oil filling port 270 for delivering lubricating oil to the lubrication point through multiple filling check valves 260. The oil pump chamber 222 and the oil suction chamber 221 are connected through a second check valve 250 provided on the cylinder rod 230. The second check valve 250 is open to the oil pump chamber 222. The lubricating oil drawn from the lubricating oil tank 100 by the oil suction chamber 221 enters the oil pump chamber 222 through the second check valve 250. When the oil pump chamber 222 is pressurized, the lubricating oil in the oil pump chamber 222 is forced into each filling check valve 260. At the same time, because the second check valve 250 is open to the oil pump chamber 222, the oil cannot flow back into the oil suction chamber 221. Due to the pressure, the oil suction chamber 221 can continuously draw lubricating oil from the lubricating oil tank 100.

[0061] The entire lubricating oil filling device 200 completes the process of filling lubricating oil from the lubricating oil tank 100 to the lubrication point through the reciprocating motion of the main cylinder 210 and the auxiliary cylinder 220, as well as the coordinated operation of multiple one-way valves.

[0062] In one embodiment of this application, the hydraulic reversing device 400 includes a first electromagnetic reversing valve 410 and a second electromagnetic reversing valve 420. The first electromagnetic reversing valve 410 includes a first oil outlet position 411. When the first electromagnetic reversing valve 410 is reversed to the first oil outlet position 411 and connected to the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit is delivered to the second electromagnetic reversing valve 420.

[0063] The first electromagnetic reversing valve 410 is used to receive the first reversing control command output by the control device 500 and to reverse according to the first reversing control command.

[0064] The second electromagnetic reversing valve 420 includes a second oil outlet position 421. When the second electromagnetic reversing valve 420 is switched to the second oil outlet position 421 and connected to the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit is delivered to the master cylinder 210, which pushes the cylinder rod 230 to reverse.

[0065] The second electromagnetic reversing valve 420 is used to receive the second reversing control command output by the control device 500 and to reverse according to the second reversing control command;

[0066] The first commutation control command is a DC current signal, and the second commutation control command is a sinusoidal current signal.

[0067] The hydraulic reversing device 400 consists of a first electromagnetic reversing valve 410 and a second electromagnetic reversing valve 420 installed in the hydraulic oil circuit. The first electromagnetic reversing valve 410 reverses according to a first reversing control command issued by the control device 500. The first reversing control command is a DC current signal. The first electromagnetic reversing valve 410 includes a first oil outlet position 411, which connects to the hydraulic oil circuit. When the first electromagnetic reversing valve 410 reverses to the first oil outlet position 411 and connects to the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit can be delivered to the second electromagnetic reversing valve 420. When the first oil outlet position 411 is not connected to the hydraulic oil circuit, the hydraulic oil entering the first electromagnetic reversing valve 410 can only return to the hydraulic device 300 through the return oil circuit.

[0068] The second electromagnetic directional valve 420 switches according to the second switching control command issued by the control device 500. The second switching control command is a sinusoidal current signal. When the current waveform is in the first quadrant, the second electromagnetic directional valve 420 does not switch; when the current waveform is in the fourth quadrant, the second electromagnetic directional valve 420 switches. That is, the second electromagnetic directional valve 420 performs periodic switching according to the second switching control command. When the second electromagnetic directional valve 420 switches to the second oil outlet position 421 and connects with the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit can be delivered to the master cylinder 210, pushing the cylinder rod 230 to move. When the second oil outlet position 421 is not connected to the hydraulic oil circuit, the hydraulic oil cannot enter the master cylinder 210, and the hydraulic oil entering the second electromagnetic directional valve 420 can only return to the hydraulic device 300 through the return oil circuit. In other words, the control device 500 achieves the effect of making the cylinder rod 230 reciprocate by outputting a second switching control command of sinusoidal current signal.

[0069] In one embodiment of this application, the hydraulic device 300 includes:

[0070] Hydraulic oil tank 310 is used to store hydraulic oil;

[0071] The hydraulic pump 320 is connected to the hydraulic oil tank 310 via a hydraulic oil circuit and is used to pump hydraulic oil to the oil reversing device 400.

[0072] The electric motor 330 is electrically connected to the hydraulic pump 320 and is used to receive control commands from the control device 500 and control whether the hydraulic pump 320 pumps hydraulic oil to the oil reversing device 400 according to the control commands.

[0073] The hydraulic oil tank 310 in the hydraulic device 300 stores the hydraulic oil required for the hydraulic transmission process, and the hydraulic oil that flows back from the oil reversing device 400 through the return oil circuit will also return to the hydraulic oil tank 310.

[0074] The hydraulic pump 320 uses the power provided by the electric motor 330 to pump the hydraulic oil in the hydraulic oil tank 310 to the oil reversing device 400. In one embodiment of this application, the hydraulic pump 320 is a fixed displacement pump. Once the speed is selected, the output flow rate after one rotation is fixed and constant, so that the pressure of the entire system remains stable to a certain extent.

[0075] The control command sent by the control device 500 is used to control the drive of the motor 330. The motor 330 controls the hydraulic pump 320 to pump hydraulic oil to the oil reversing device 400 according to the control command, that is, whether to provide power to the hydraulic pump 320.

[0076] In one embodiment of this application, the electric motor 330 can also be other forms of power source, such as an energy feedback device in construction machinery. When the lubricating oil filling system is integrated with the construction machinery, this energy feedback device can be used to power the hydraulic pump 320.

[0077] In one embodiment of this application, the control device 500 includes:

[0078] The oil pressure detection unit 510 is communicatively connected to the pressure sensor to acquire the filling oil pressure of the lubricating oil filling port 270 and generate a pressure value signal based on the filling oil pressure.

[0079] The conveying control unit 520 is electrically connected to the hydraulic device 300. It is used to acquire pressure value signals, generate conveying control commands based on the pressure value signals, and output the conveying control commands to the hydraulic device 300 to control whether the hydraulic device 300 conveys hydraulic oil to the oil reversing device 400.

[0080] The reversing control unit 530 is electrically connected to the oil reversing device 400. It is used to acquire pressure value signals, generate reversing control commands based on the pressure value signals, and output the reversing control commands to the oil reversing device 400 to control the oil reversing device 400 to reverse.

[0081] After the oil pressure detection unit 510 obtains the filling oil pressure as a digital signal through the KL1 port, it determines whether the lubricating oil filling port 270 needs to be replenished based on the filling oil pressure. The oil pressure detection unit 510 can be set to obtain the filling oil pressure at a certain interval, and the specific interval can be determined according to the lubrication needs of the engineering machinery.

[0082] In one embodiment of this application, the oil pressure detection unit 510 includes a digital-to-analog converter for converting the filling oil pressure, which is a digital signal, into a pressure value signal, which is an analog signal.

[0083] If the pressure at the lubricating oil filling port 270 is stable, no oil replenishment is required. The oil pressure detection unit 510 converts the digital signal into an analog signal (level signal) to generate a pressure value signal α = 1. If the pressure at the lubricating oil filling port 270 is lower than the set threshold, oil replenishment is required. The oil pressure detection unit 510 converts the digital signal into an analog signal (level signal) to generate a pressure value signal α = 0.

[0084] After receiving the pressure signal α, the delivery control unit 520 generates a control command based on α and outputs it from the SH3 port to the motor 330. If α = 1, oil replenishment is required. The control command instructs the motor 330 to start and output power to the hydraulic pump 320, causing the hydraulic pump 320 to pump oil to the oil reversing device 400.

[0085] After receiving the pressure signal α, the reversing control unit 530 generates a first reversing control command and a second reversing control command based on α. ​​The first reversing control command is output from the SH1 port to the first solenoid reversing valve 410, and the second reversing control command is output from the SH2 port to the second solenoid reversing valve 420. If α = 1, oil replenishment is required. The first reversing control command instructs the first solenoid reversing valve 410 to reverse, connecting the first oil outlet position 411 of the first solenoid reversing valve 410 to the hydraulic oil circuit. The second reversing control command instructs the second solenoid reversing valve 420 to perform periodic reversing, driving the cylinder rod 230 to reciprocate.

[0086] Figure 3 A flowchart illustrating a lubricating oil filling method according to an embodiment of this application is shown schematically. Figure 3 As shown, in one embodiment of this application, a lubricating oil filling method is provided, applied to the lubricating oil filling system in the above embodiment, the method comprising:

[0087] Step S110: The control device 500 obtains the filling oil pressure of the lubricating oil filling port 270, and controls the hydraulic device 300 to deliver hydraulic oil to the oil reversing device 400 according to the filling oil pressure;

[0088] Step S120: Control the oil reversing device 400 to switch according to the oil pressure, so as to control whether the hydraulic oil is delivered to the lubricating oil filling device 200;

[0089] Step S130: Lubricating oil is injected into the lubrication point through the lubricating oil filling device 200.

[0090] Figure 4 This schematic diagram illustrates the hydraulic transmission process of a lubricating oil filling system according to an embodiment of this application. Please refer to it as well. Figure 3 and Figure 4The control device 500 obtains the oil filling pressure through the KL1 port and generates a pressure value signal α based on the oil filling pressure (α=1, oil replenishment is required; α=0, oil replenishment is not required). If α=1, the first reversing control command is output to the first solenoid reversing valve 410 through the SH1 port, the second reversing control command is output to the second solenoid reversing valve 420 through the SH2 port, and the control command is output to the motor 330 through the SH3 port, so that the first solenoid reversing valve 410 is reversed to the first oil outlet position 411, the second solenoid reversing valve 420 is periodically reversed, and the motor 330 drives the hydraulic pump 320 to pump oil. In this way, the hydraulic transmission process of adaptive lubricant filling of the entire lubricant filling system is completed. The lubricant filling system draws lubricant from the lubricant tank 100 and injects the lubricant into the lubrication point through the reciprocating motion of the cylinder rod 230 in the main cylinder 210 and the auxiliary cylinder 220 and the cooperation of the one-way valve. The adaptive lubricant filling can be completed without any manual operation, avoiding mechanical wear caused by forgetting to add lubricant due to human factors, and enhancing the reliability of construction machinery.

[0091] In one embodiment of this application, an engineering machine is provided, including the lubricating oil filling system described in the above embodiment.

[0092] In one embodiment of this application, a machine-readable storage medium is provided, on which instructions are stored, which, when executed by a processor, cause the processor to implement the lubricating oil filling method in the above embodiment.

[0093] In one embodiment of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the lubricating oil filling method according to the above embodiments.

[0094] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0095] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0096] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0097] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0098] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0099] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0100] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A lubricating oil filling system, characterized in that, For use in construction machinery, the system includes: A lubricating oil tank is used to store lubricating oil. A lubricating oil filling device is connected to the lubricating oil tank via a lubricating oil circuit. The lubricating oil filling device includes a lubricating oil filling port for injecting lubricating oil into the lubrication point. The lubricating oil filling port is equipped with a pressure sensor for detecting the filling oil pressure at the lubricating oil filling port. A hydraulic device is connected to the lubricating oil filling device via a hydraulic circuit. The hydraulic circuit is equipped with an oil reversing device, and the hydraulic device is used to supply hydraulic oil to the oil reversing device. The control device is communicatively connected to the pressure sensor and electrically connected to the oil reversing device. The lubricating oil filling device includes: The main cylinder is connected to the hydraulic reversing device via the hydraulic circuit. The auxiliary cylinder is rigidly connected to the main cylinder via a cylinder rod. The control device is used for: Obtain the filling oil pressure; The hydraulic device is controlled to supply hydraulic oil to the oil reversing device based on the oil injection pressure. The hydraulic reversing device is controlled to switch directions according to the filling oil pressure, so as to control whether the hydraulic reversing device delivers hydraulic oil to the lubricating oil filling device; The hydraulic switching device includes a first electromagnetic switching valve and a second electromagnetic switching valve. The first electromagnetic switching valve includes a first oil outlet position. When the first electromagnetic switching valve switches to the first oil outlet position and connects with the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit is delivered to the second electromagnetic switching valve. The first electromagnetic reversing valve is used to receive the first reversing control command output by the control device, and to reverse according to the first reversing control command; The second electromagnetic directional valve includes a second oil outlet position. When the second electromagnetic directional valve switches to the second oil outlet position and connects with the hydraulic oil circuit, the hydraulic oil in the hydraulic oil circuit is delivered to the master cylinder, which pushes the cylinder rod to move. The second electromagnetic reversing valve is used to receive the second reversing control command output by the control device, and to reverse according to the second reversing control command; Wherein, the first commutation control command is a DC current signal, and the second commutation control command is a sinusoidal current signal.

2. The lubricating oil filling system according to claim 1, characterized in that, The auxiliary cylinder includes an oil suction chamber and an oil pumping chamber. The oil pumping chamber includes a lubricating oil filling port. The oil suction chamber is connected to the lubricating oil tank via a first one-way valve. The oil pumping chamber communicates with the oil suction chamber via a second one-way valve mounted on the cylinder rod. The first one-way valve opens to the oil suction chamber, and the second one-way valve opens to the oil pumping chamber. Multiple filling check valves are connected to the pump oil chamber through the lubrication oil circuit. The filling check valves are connected to the lubrication point to deliver lubricating oil to the lubrication point.

3. The lubricating oil filling system according to claim 1, characterized in that, The hydraulic device includes: Hydraulic oil tank, used to store hydraulic oil; A hydraulic pump, connected to the hydraulic oil tank via the hydraulic oil circuit, is used to pump hydraulic oil to the oil reversing device; An electric motor, electrically connected to the hydraulic pump, is used to receive control commands from the control device and control whether the hydraulic pump delivers hydraulic oil to the oil reversing device according to the control commands.

4. The lubricating oil filling system according to claim 3, characterized in that, The hydraulic pump is a fixed displacement pump.

5. The lubricating oil filling system according to claim 1, characterized in that, The control device includes: The oil pressure detection unit is communicatively connected to the pressure sensor and is used to acquire the filling oil pressure and generate a pressure value signal based on the filling oil pressure. The delivery control unit is electrically connected to the hydraulic device and is used to acquire the pressure value signal, generate a delivery control command based on the pressure value signal, and output the delivery control command to the hydraulic device to control whether the hydraulic device delivers hydraulic oil to the oil reversing device. The reversing control unit is electrically connected to the oil reversing device, and is used to acquire the pressure value signal, generate a reversing control command based on the pressure value signal, and output the reversing control command to the oil reversing device to control the oil reversing device to reverse.

6. The lubricating oil filling system according to claim 5, characterized in that, The oil pressure detection unit includes a digital-to-analog converter for converting the filling oil pressure, which is a digital signal, into the pressure value signal, which is an analog signal.

7. An engineering machinery, characterized in that, Includes the system as described in any one of claims 1-6.

8. A method for adding lubricating oil, characterized in that, Applied to the system as described in any one of claims 1-6, the method comprises: The control device obtains the filling oil pressure at the lubricating oil filling port and controls whether the hydraulic device supplies hydraulic oil to the oil reversing device based on the filling oil pressure. The hydraulic pressure control oil reversing device is switched according to the filling oil pressure to control whether hydraulic oil is delivered to the lubricating oil filling device; Lubricating oil is injected into the lubrication point through the lubricating oil filling device.

9. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions that, when executed by a processor, cause the processor to implement the lubricating oil filling method according to claim 8.

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