Lubricating and cooling system of power takeoff and vehicle

Abstract

The invention provides a lubricating and cooling system of a power takeoff and a vehicle, and relates to the technical field of power takeoff control. The lubricating and cooling system of the power takeoff comprises an oil tank, an oil pump, a thermostat device, an oil cooler and the power takeoff, an oil suction port of the oil pump is connected to an oil outlet of the oil tank, an oil outlet of the oil pump is connected to an oil inlet of the thermostat device, two oil outlets of the thermostat device are connected to an oil inlet of the power takeoff and an oil inlet of the oil cooler respectively, and an oil outlet of the oil cooler is connected to the oil inlet of the power takeoff. The thermostat device is used for controlling the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the thermostat device is larger than or equal to a preset temperature threshold value, and / or controlling the lubricating oil to enter the power takeoff when the temperature of the lubricating oil entering the thermostat device is smaller than the preset temperature threshold value; and an oil outlet of the power takeoff is connected to an oil return port of the oil tank. According to the system, the problem that the power takeoff does not have the lubricating and cooling functions at the same time is solved.

Description

Technical Field

[0001] This application relates to the technical field of power take-off control, and particularly to a lubrication and cooling system for a power take-off and a vehicle. Background Art

[0002] With the development of today's society, the number of special-purpose vehicles is increasing day by day, and the use of power take-offs has thus become more widespread. As a key component for obtaining mechanical power from the vehicle power source and transmitting it to various auxiliary devices, the power take-off plays an indispensable role in many fields such as fire trucks, sanitation vehicles, and construction vehicles.

[0003] The power take-offs of existing special-purpose vehicles only have lubrication or cooling functions. Although the application scenarios of power take-offs are constantly expanding, most existing power take-off control systems fail to integrate cooling and lubrication functions. This not only limits the full play of the power take-off performance, but also may lead to shortened equipment life and increased maintenance costs due to overheating or wear, and it is impossible to accurately monitor the working state of the power take-off lubrication system, resulting in insufficient lubrication and ablation problems. Summary of the Invention

[0004] This application provides a lubrication and cooling system for a power take-off and a vehicle to solve the problem that the power take-off does not have both lubrication and cooling functions.

[0005] In a first aspect, this application provides a lubrication and cooling system for a power take-off, and the system includes:

[0006] The lubrication and cooling system for a power take-off includes: an oil tank, an oil pump, a thermostat device, an oil cooler, and a power take-off;

[0007] Wherein, the suction port of the oil pump is connected to the oil outlet of the oil tank, the oil outlet of the oil pump is connected to the oil inlet of the thermostat device, the two oil outlets of the thermostat device are respectively connected to the oil inlet of the power take-off and the oil inlet of the oil cooler, the oil outlet of the oil cooler is connected to the oil inlet of the power take-off, and the thermostat device is used to control the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the thermostat device is greater than or equal to a preset temperature threshold, and / or, when the temperature of the lubricating oil entering the thermostat device is less than the preset temperature threshold, control the lubricating oil to enter the power take-off;

[0008] The oil outlet of the power take-off is connected to the oil return port of the oil tank.

[0009] In a possible design, the thermostat device includes: a first temperature sensor, an internal controller, a first oil outlet, and a second oil outlet. The first oil outlet is connected to a power take-off, and the second oil outlet is connected to an oil cooler. The temperature sensor is communicatively connected to the internal controller. The temperature sensor is configured to send the detected oil temperature to the internal controller. The internal controller is configured to control the lubricating oil to be output via the first oil outlet when the oil temperature is greater than or equal to a preset oil temperature threshold, and / or control the lubricating oil to be output via the second oil outlet when the oil temperature is less than the preset oil temperature threshold.

[0010] A second temperature sensor is further provided between the oil cooler and the power take-off. At least one of the first temperature sensor, the second temperature sensor, or the internal controller is also communicatively connected to an external control unit, and is configured to send an oil temperature abnormality message to the external control unit when the detected oil temperature is greater than or equal to the preset oil temperature threshold.

[0011] In a possible design, a first oil path is provided between the oil suction port of the oil pump and the oil outlet of the fuel tank, and an oil filter is provided on the first oil path.

[0012] In a possible design, a second oil path is further provided between the oil suction port of the oil pump and the oil outlet of the fuel tank, and a first control valve is provided on the second oil path. The first control valve is configured to control whether the lubricating oil reaches the oil pump through the second oil path.

[0013] In a possible design, a first pressure sensor is further provided on the second oil path between the first control valve and the oil pump. The first pressure sensor is communicatively connected to the external control unit. When the absolute value of the detected negative pressure is greater than or equal to a first negative pressure threshold, the first pressure sensor sends an oil filter abnormality message to the external control unit.

[0014] In a possible design, the first control valve is a negative pressure valve or a first electronic valve. When the first control valve is the first electronic valve, the first electronic valve is communicatively connected to the external control unit. The external control unit opens the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is greater than or equal to the first negative pressure threshold, and / or closes the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is less than the first negative pressure threshold.

[0015] In a possible design, the oil outlet of the oil pump is further connected to the oil return port of the fuel tank through a third oil path, and a second control valve is provided on the third oil path. The second control valve is configured to control whether the lubricating oil returns to the fuel tank through the third oil path.

[0016] In a possible design, a second pressure sensor is further provided between the oil pump and the second control valve on the third oil path. The second pressure sensor is also communicatively connected to an external control unit. When the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, the second pressure sensor sends an abnormal information of the thermostat device to the external control unit.

[0017] In a possible design, the second control valve is an overflow valve or a second electronic valve. When the second control valve is the second electronic valve, the second electronic valve is communicatively connected to an external control unit. The external control unit opens the second electronic valve when the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, and / or closes the second electronic valve when the oil pressure detected by the second pressure sensor is less than the first oil pressure threshold.

[0018] In a second aspect, the present application provides a vehicle, including:

[0019] A lubrication and cooling system of a power take-off as described in the invention content of the first aspect.

[0020] The lubrication and cooling system of a power take-off and the vehicle provided by the present application. The lubrication and cooling system of the power take-off includes: an oil tank, an oil pump, a thermostat device, an oil cooler and a power take-off; wherein, the suction port of the oil pump is connected to the oil outlet of the oil tank, the oil outlet of the oil pump is connected to the oil inlet of the thermostat device, the two oil outlets of the thermostat device are respectively connected to the oil inlet of the power take-off and the oil inlet of the oil cooler, the oil outlet of the oil cooler is connected to the oil inlet of the power take-off, and the thermostat device is used to control the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the thermostat device is greater than or equal to a preset temperature threshold, and / or control the lubricating oil to enter the power take-off when the temperature of the lubricating oil entering the thermostat device is less than the preset temperature threshold; the oil outlet of the power take-off is connected to the oil return port of the oil tank. The following technical effects are achieved: the oil pumped out by the oil outlet of the oil pump is transported to the thermostat device, the oil temperature can be monitored in real time, and the decrease of the system efficiency and the volumetric efficiency caused by too high oil temperature can be avoided, which affects the normal movement of the working mechanism; after the thermostat device monitors the oil temperature, there are two oil outlets, which can be respectively pumped to the power take-off and the oil cooler, and can be pumped to the power take-off after the oil cooler cools the oil temperature, avoiding problems such as thermal deformation and ablation of mechanical equipment that may be caused by a long-term high-temperature environment, and destroying the original equipment accuracy; the oil outlet of the power take-off can also be connected to the oil return port of the oil tank, which can make the lubricating oil after work flow back to the oil tank, contribute to the cleanliness of the system, simplify the pipeline design of the hydraulic system, reduce the complexity and maintenance cost of the system, and ensure that other key components have sufficient oil supply to play a lubricating role, so that the power take-off control system takes into account both lubrication and cooling functions. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the system architecture of the lubrication and cooling system of the power take-off provided by the embodiment of the present application;

[0023] Figure 2 It is a schematic diagram of the scenario of the lubrication and cooling system of the power take-off provided by the embodiment of the present application;

[0024] Figure 3 It is a schematic diagram of the lubrication and cooling system of the power take-off provided by the embodiment of the present application.

[0025] Reference numerals:

[0026] 100 - Lubrication and cooling system of the power take-off; 200 - Lubrication and cooling control system; 300 - External control unit; 210 - Fuel tank; 220 - Oil pump; 230 - Thermostatic device; 240 - Oil cooler; 250 - Power take-off; 260 - Oil filter; 270 - First control valve; 280 - First pressure sensor; 290 - Second control valve; 211 - Second pressure sensor;

[0027] 231 - First temperature sensor; 232 - Internal control unit; 241 - Second temperature sensor. Specific embodiments

[0028] Here, the exemplary embodiments will be described in detail, and the 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.

[0029] In the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way. In the embodiments of the present application, "at least one" refers to one or more, and "more" refers to two or more.

[0030] It should be noted that the "at..." in the embodiments of the present application can be the instant when a certain situation occurs, or it can be a period of time after a certain situation occurs, and the embodiments of the present application do not specifically limit this. In addition, the lubricating and cooling system of the power take-off and the vehicle provided in the embodiments of the present application are only examples, and the lubricating and cooling system of the power take-off and the vehicle can also include more or less content.

[0031] In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies involved in the embodiments of the present application are briefly introduced below:

[0032] Power take-off: A power take-off is a mechanical device that takes power from a vehicle's power source (such as an engine or transmission) and transmits that power to other mechanical equipment that needs to be driven. Typically, power take-offs are installed in commercial vehicles, agricultural machinery, construction equipment, and industrial applications to power various accessories or auxiliary equipment, such as hydraulic pumps, compressors, mixers, snowplows, etc.

[0033] Negative pressure: Negative pressure usually refers to a pressure state lower than the ambient pressure, usually measured in absolute pressure. When the pressure of a system is lower than the atmospheric pressure, the system is considered to be in a negative pressure state. In this application, negative pressure refers to the adsorption pressure caused by the suction effect of the oil pump when it is working.

[0034] Oil pressure: Oil pressure refers to the pressure of the oil in a hydraulic system or lubrication system due to the action of a pump. In this application, oil pressure refers to the pressure formed by the blockage of the oil circuit, which prompts the second control valve to open or close.

[0035] With the continuous development of automobile technology and society, the number of special-purpose vehicles has increased rapidly. These technological advances have not only improved the performance and efficiency of special-purpose vehicles, but also expanded their application scope to meet the needs of different industries.

[0036] As a key component of a vehicle, the power take-off is used to transmit the power of the vehicle to the mechanical equipment to be driven, and it has unique uses in various special-purpose vehicles. The lubrication and cooling of the power take-off are particularly important for its operation.

[0037] The current power take-off of special-purpose vehicles has a cooling function. Through devices such as coolers and heat exchange chambers, the oil is cooled, and the cooling function is achieved by transforming the internal structure of the power take-off itself. Or there is a lubrication and cooling device to achieve the cooling and lubrication of the power take-off based on devices such as gearboxes.

[0038] However, this kind of lubrication and cooling system of the power take-off only focuses on the structural design of the power take-off, and there is rarely a control system for the power take-off that integrates lubrication and cooling functions. This not only limits the full play of the performance of the power take-off but also may lead to a shortened equipment life and increased maintenance costs due to overheating or wear. In the context of the increasing demand for high performance and reliability, it is particularly important to add an effective cooling and lubrication mechanism to the control system of the power take-off to ensure its stable operation in a more demanding working environment, extend its service life, and reduce long-term operating costs.

[0039] Therefore, how to integrate the cooling function and lubrication function on the control system of the power take-off is an urgent problem to be solved at present.

[0040] Based on this, the embodiments of the present application provide a lubrication and cooling system for a power take-off and a vehicle, which can be used in the technical field of power take-off control and aims to solve the above technical problems in the prior art.

[0041] Figure 1 It is a schematic diagram of the system architecture of the lubrication and cooling system for the power take-off provided by the embodiments of the present application. It should be noted that Figure 1 The shown is only an example of the system architecture to which the embodiments of the present application can be applied to help those skilled in the art understand the technical content of the present application, but it does not mean that the embodiments of the present application cannot be used in other devices, systems, environments or scenarios.

[0042] As Figure 1 shown, the system architecture of the lubrication and cooling system for the power take-off includes: the lubrication and cooling system 100 for the power take-off. The lubrication and cooling system 100 for the power take-off includes a lubrication and cooling control system 200 and an external control unit 300.

[0043] The lubrication control system 200 includes: an oil tank 210, an oil pump 220, a thermostat device 230, an oil cooler 240, a power take-off 250, an oil filter 260, a first control valve 270, a first pressure sensor 280, a second control valve 290, and a second pressure sensor 211.

[0044] The oil outlet of the fuel tank 210 is connected to a first oil circuit, and the first oil circuit includes an oil filter 260 and an oil pump 220. The lubricating oil in the fuel tank 210 passes through the oil filter 260 and is transported to the inlet of the oil pump 220.

[0045] The oil outlet of the fuel tank 210 is also connected to a second oil circuit, and the second oil circuit includes a first control valve 270, a first pressure sensor 280 and an oil pump 220. The lubricating oil in the fuel tank 210 passes through the first control valve 270 and the first pressure sensor 280 and is transported to the inlet of the oil pump 220.

[0046] The oil outlet of the oil pump 220 is connected to a third oil circuit, and the third oil circuit includes a second pressure sensor 211 and a second control valve 290. The lubricating oil of the oil pump 220 passes through the oil outlet of the oil pump 220, the second pressure sensor 211 and the second control valve 290 and is transported to the oil return port of the fuel tank 210.

[0047] The oil outlet of the oil pump 220 can be connected to a temperature control device 230, and the temperature control device 230 includes a first temperature sensor 231 and an internal control unit 232. The temperature control device 230 can be connected to a power take-off 250 or an oil cooler 240 through a first oil outlet and a second oil outlet respectively. The oil outlet of the oil cooler 240 is connected to the power take-off 250, and the oil outlet of the power take-off 250 is connected to the oil return port of the fuel tank 210. Moreover, a second temperature sensor 241 is connected between the circuits of the oil cooler 240 and the power take-off 250.

[0048] In addition, the first pressure sensor 280, the second temperature sensor 241 and the internal control unit 232 are all communicatively connected to an external control unit 300.

[0049] Figure 2 It is a schematic diagram of the scenario of the lubrication and cooling system of the power take-off provided by the embodiment of the present application. It should be noted that Figure 2 The shown is only an example of the scenario where the embodiment of the present application can be applied to help those skilled in the art understand the technical content of the present application, but it does not mean that the embodiment of the present application cannot be used in other devices, systems, environments or scenarios.

[0050] As Figure 2 shown, the power take-off is installed on a special vehicle 400. The power take-off is an additional device on special vehicles such as cranes, fire pumps, and garbage compressors that transmits the power of the engine to other devices or machinery that require power drive through a gearbox or a transfer case.

[0051] The lubrication and cooling system 100 of the power take-off includes a power take-off. When the special vehicle 400 needs to use the power take-off, the lubrication and cooling system 100 of the power take-off starts to work, reduces the oil temperature, achieves the cooling effect, and prevents overheating damage and ablation. And it is necessary to achieve the lubrication effect to avoid the power take-off not being lubricated, increasing the wear between mechanical components and reducing the efficiency.

[0052] Figure 3 It is a schematic diagram of the lubrication and cooling system of the power take-off provided by the embodiment of the present application. As Figure 3 shown, the system includes:

[0053] The lubrication and cooling system of the power take-off includes: an oil tank, an oil pump, a thermostat device, an oil cooler, and a power take-off;

[0054] Among them, the suction port of the oil pump is connected to the oil outlet of the oil tank, the oil outlet of the oil pump is connected to the oil inlet of the thermostat device, the two oil outlets of the thermostat device are respectively connected to the oil inlet of the power take-off and the oil inlet of the oil cooler, the oil outlet of the oil cooler is connected to the oil inlet of the power take-off, and the thermostat device is used to control the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the thermostat device is greater than or equal to the preset temperature threshold, and / or, when the temperature of the lubricating oil entering the thermostat device is less than the preset temperature threshold, control the lubricating oil to enter the power take-off;

[0055] The oil outlet of the power take-off is connected to the oil return port of the oil tank.

[0056] Specifically, as Figure 3 shown, the arrow indicates the flow direction of the oil circuit.

[0057] The lubrication and cooling system of the power take-off includes a variety of devices: an oil tank 210, an oil pump 220, a thermostat device 230, an oil cooler 240, a power take-off 250, an oil filter 260, a first control valve 270, a first pressure sensor 280, a second control valve 290, a second pressure sensor 211, and an external control unit 300.

[0058] The oil tank 210 has two oil outlets, which are respectively externally connected to a first oil circuit and a second oil circuit.

[0059] The first oil circuit is used to indicate the oil in the oil tank 210. Through the first oil circuit, it is pumped to the oil filter 260 and the oil pump 220 in sequence, that is, the oil tank 210 is externally connected to the first oil circuit, passing through the oil filter 260, to the oil pump 220.

[0060] The second oil circuit is used to indicate the oil in the oil tank 210. Through the second oil circuit, it is pumped to the first control valve 270, the first pressure sensor 280, and the oil pump 220 in sequence, that is, the oil tank 210 is externally connected to the second oil circuit, passing through the first control valve 270 and the first pressure sensor 280, and pumped to the oil pump 220.

[0061] In addition, the fuel tank 210 is also provided with an oil return port, which can be externally connected to a third oil circuit and the oil circuit returned by the power take-off 250 respectively.

[0062] The oil pump 220 is externally connected to the third oil circuit. The third circuit is used to indicate the oil of the oil pump 220, which is pumped to the second pressure sensor 211, the second control valve 290, and the oil return port of the fuel tank 210 in sequence through the oil outlet of the oil pump 220.

[0063] The oil pump 220 is also connected to the oil circuit of the temperature control device 230. The temperature control device 230 includes two oil outlets, namely the first oil outlet and the second oil outlet. The first oil outlet of the temperature control device 230 is connected to the oil inlet of the power take-off 250, and the second oil outlet of the temperature control device 230 is connected to the oil cooler 240.

[0064] The temperature control device 230 includes a first temperature sensor 231 and an internal control unit 232. The first temperature sensor 231 is used to monitor the oil temperature in real time. The internal control unit 232 receives the real-time oil temperature monitored by the first temperature sensor 231, and when the oil temperature is greater than or equal to the preset oil temperature threshold, controls the lubricating oil to be output via the first oil outlet, and / or when the oil temperature is less than the preset oil temperature threshold, controls the lubricating oil to be output via the second oil outlet. And the internal control unit 232 transmits the real-time oil temperature to the external control unit 300.

[0065] When the oil is output from the first oil outlet of the temperature control device 230, it is pumped to the oil inlet of the power take-off 250.

[0066] When the oil is output from the second oil outlet of the temperature control device 230, the oil is pumped to the oil inlet of the oil cooler 240. The oil cooler 240 cools the oil, and then the oil flows out of the oil cooler 240, passes through the second temperature sensor 241, and is pumped to the oil inlet of the power take-off 250.

[0067] The oil outlet of the power take-off 250 is connected to the oil return port of the fuel tank 210.

[0068] A lubrication and cooling system for a power take-off provided by the present application. The lubrication and cooling system of the power take-off includes: an oil tank, an oil pump, a temperature control device, an oil cooler, and a power take-off. Among them, the suction port of the oil pump is connected to the oil outlet of the oil tank, the oil outlet of the oil pump is connected to the oil inlet of the temperature control device, the two oil outlets of the temperature control device are respectively connected to the oil inlet of the power take-off and the oil inlet of the oil cooler, the oil outlet of the oil cooler is connected to the oil inlet of the power take-off, and the temperature control device is used to control the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the temperature control device is greater than or equal to a preset temperature threshold, and / or to control the lubricating oil to enter the power take-off when the temperature of the lubricating oil entering the temperature control device is less than the preset temperature threshold; the oil outlet of the power take-off is connected to the oil return port of the oil tank. The following technical effects are achieved: The oil pumped out by the oil outlet of the oil pump is transported to the temperature control device, and the oil temperature can be monitored in real time to avoid the decline of system efficiency and volumetric efficiency caused by too high oil temperature, which affects the normal movement of the working mechanism; after the temperature control device monitors the oil temperature, there are two oil outlets, which can be pumped to the power take-off and the oil cooler respectively. After the oil cooler cools the oil temperature, it can be pumped to the power take-off again to avoid problems such as thermal deformation and ablation of mechanical equipment that may be caused by a long-term high-temperature environment, which destroys the original equipment accuracy; the oil outlet of the power take-off can also be connected to the oil return port of the oil tank, which can make the lubricating oil after work flow back to the oil tank, contribute to the cleanliness of the system, simplify the pipeline design of the hydraulic system, reduce the complexity and maintenance cost of the system, and ensure that other key components have sufficient oil supply to play a lubricating role, so that the power take-off control system takes into account both lubrication and cooling functions.

[0069] In a possible design, the temperature control device includes: a first temperature sensor, an internal controller, a first oil outlet, and a second oil outlet. The first oil outlet is connected to the power take-off, the second oil outlet is connected to the oil cooler, the temperature sensor is communicatively connected to the internal controller, and the temperature sensor is used to send the detected oil temperature to the internal controller. The internal controller is used to control the lubricating oil to be output via the first oil outlet when the oil temperature is greater than or equal to a preset oil temperature threshold, and / or to control the lubricating oil to be output via the second oil outlet when the oil temperature is less than the preset oil temperature threshold;

[0070] A second temperature sensor is further provided between the oil cooler and the power take-off. At least one of the first temperature sensor, the second temperature sensor, or the internal controller is also communicatively connected to an external control unit, and is used to send an oil temperature abnormality message to the external control unit when the detected oil temperature is greater than or equal to a preset oil temperature threshold.

[0071] Specifically, as Figure 3 shown, the temperature control device 230 includes a first temperature sensor 231, an internal control unit 232, and two oil outlets.

[0072] The first temperature sensor 231 monitors the oil temperature pumped to the thermostat device 230 in real time. The internal control unit 232 obtains the oil temperature monitored by the first temperature sensor 231 in real time, conducts control processing, and transmits the temperature to the external control unit 300.

[0073] The first oil outlet is connected to the oil inlet of the power take-off 250, and the second oil outlet is connected to the oil inlet of the oil cooler 240.

[0074] When the oil temperature is greater than or equal to the preset oil temperature threshold, control the lubricating oil to be output through the first oil outlet. When the oil temperature is less than the preset oil temperature threshold, control the lubricating oil to be output through the second oil outlet.

[0075] The oil outlet of the oil cooler 240 is connected to the oil inlet of the power take-off 250. A second temperature sensor 241 is also provided between the oil cooler 240 and the power take-off 250 for monitoring the oil temperature in real time.

[0076] In addition, the first temperature sensor 231, the internal control unit 232, and the second temperature sensor 241 can all be communicatively connected to the external control unit 300, so as to timely send an oil temperature abnormality message to the external control unit when the detected oil temperature is greater than or equal to the preset oil temperature threshold.

[0077] The technical effect provided by this embodiment is that the thermostat device is provided with a temperature sensor, and a temperature sensor is still provided after the oil cooler, which can monitor the oil temperature in real time and avoid the problem of ablation of the power take-off due to too high oil temperature.

[0078] In a possible design, a first oil circuit is provided between the oil suction port of the oil pump and the oil outlet of the fuel tank, and an oil filter is provided on the first oil circuit.

[0079] Specifically, a first oil circuit is connected between the oil pump 220 and the fuel tank 210.

[0080] And an oil filter 260 is provided on the first oil circuit between the oil pump 220 and the fuel tank 210.

[0081] The technical effect provided by this embodiment is that the provided oil filter filters out impurities in the oil pumped by the fuel tank, ensures the cleanliness of the oil entering the oil pump, protects the system components, and maintains the system performance.

[0082] In a possible design, a second oil circuit is also provided between the oil suction port of the oil pump and the oil outlet of the fuel tank, and a first control valve is provided on the second oil circuit. The first control valve is used to control whether the lubricating oil passes through the second oil circuit to reach the oil pump.

[0083] Specifically, a second oil circuit is connected between the oil pump 220 and the fuel tank 210.

[0084] The oil in the oil tank 210 is pumped to the first control valve 270 through the oil outlet of the oil tank 210 and the second oil circuit in sequence. The first control valve 270 controls whether the lubricating oil is pumped to the oil pump 220 through the second oil circuit.

[0085] The technical effect provided by this embodiment is that, by means of the control valve provided in the second oil circuit, the direction of oil inflow or outflow can be controlled, and the pressure of the system or the local circuit can be adjusted and maintained.

[0086] In a possible design, a first pressure sensor is further provided on the second oil circuit between the first control valve and the oil pump. The first pressure sensor is communicatively connected to an external control unit. When the absolute value of the negative pressure detected by the first pressure sensor is greater than or equal to a first negative pressure threshold, the first pressure sensor sends oil filter abnormality information to the external control unit.

[0087] Specifically, the second oil circuit is further provided with a first pressure sensor 280. The first pressure sensor 280 is located between the first control valve 270 and the oil pump 220, and is used to monitor the pressure information in the circuit in real time.

[0088] The negative pressure detection value here is a negative value.

[0089] In addition, the first pressure sensor 280 is also communicatively connected to the external control unit 300 to send oil filter abnormality information to the external control unit 300 when the absolute value of the monitored negative pressure is greater than or equal to the first negative pressure threshold.

[0090] The technical effect provided by this embodiment is that the first pressure sensor arranged in the second oil circuit monitors the pressure changes inside the oil circuit in real time, ensures the safety and efficiency of the system operation, and can timely feedback the oil pressure information.

[0091] In one possible design, the first control valve is a negative pressure valve or a first electronic valve. When the first control valve is the first electronic valve, the first electronic valve is communicatively connected to an external control unit. The external control unit opens the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is greater than or equal to a first negative pressure threshold, and / or closes the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is less than the first negative pressure threshold.

[0092] Specifically, the first control valve 270 may be a negative pressure valve and a first electronic valve.

[0093] When the first control valve 270 is a negative pressure valve, under normal conditions, the oil only passes through the oil filter 260 and flows into the oil pump 220. When the oil filter 260 is clogged by impurities or the flow is blocked, a negative pressure is generated at the oil suction port of the oil pump 220 and gradually increases until the negative pressure valve opens, and the oil flows out from the negative pressure valve and flows to the oil pump 220.

[0094] When the first control valve 270 is an electronic valve, the first electronic valve can be communicatively connected to an external control unit 300. When the absolute value of the negative pressure detected by the first pressure sensor 280 is greater than or equal to the first negative pressure threshold, the first electronic valve is opened; when the absolute value of the negative pressure detected by the first pressure sensor is less than the first negative pressure threshold, the first electronic valve is closed.

[0095] The technical effect provided by this embodiment is that the first control valve can include two types of valves, which can respectively handle the opening and closing problems of the valves under pressure changes, avoid the problem of insufficient lubrication, and can indicate problems such as oil filter clogging or other abnormalities.

[0096] In a possible design, the oil outlet of the oil pump is also connected to the oil return port of the fuel tank through a third oil passage, and a second control valve is also provided on the third oil passage, and the second control valve is used to control whether the lubricating oil returns to the fuel tank through the third oil passage.

[0097] Specifically, the oil outlet of the oil pump 220 is also connected to a third oil passage.

[0098] The end of the third oil passage is connected to the oil return port of the fuel tank 210.

[0099] A second control valve 290 is also provided on the third oil passage, and the second control valve 290 can control whether the lubricating oil returns to the fuel tank 210 through the third oil passage.

[0100] The technical effect provided by this embodiment is that it controls the flow direction of the oil pumped by the oil pump, maintains and regulates the pressure in the system or a local circuit, and avoids excessive oil pressure from damaging the lubrication system.

[0101] In a possible design, a second pressure sensor is also provided on the third oil passage between the oil pump and the second control valve, and the second pressure sensor is also communicatively connected to the external control unit. When the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, the second pressure sensor sends abnormal information of the thermostat device to the external control unit.

[0102] Specifically, a second pressure sensor 211 is also provided on the third oil passage.

[0103] The second pressure sensor 211 is arranged between the oil pump 220 and the second control valve 290 for detecting the pressure problem in the circuit in real time.

[0104] The oil pressure detection value here is a positive value.

[0105] The second pressure sensor 211 can be communicatively connected to the external control unit 300, and can send the oil pressure monitored in real time to the external control unit 300. When the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, it sends abnormal information of the oil passage or the thermostat device to the external control unit 300.

[0106] The technical effect provided by this embodiment is that the second pressure sensor can indicate the signal of abnormal oil circuit in real time, so as to facilitate timely adjustment.

[0107] In a possible design, the second control valve is an overflow valve or a second electronic valve. When the second control valve is a second electronic valve, the second electronic valve is communicatively connected to an external control unit. When the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, the external control unit opens the second electronic valve, and / or when the oil pressure detected by the second pressure sensor is less than the first oil pressure threshold, the external control unit closes the second electronic valve.

[0108] Specifically, the second control valve 290 can be an overflow valve or a second electronic valve.

[0109] When the second control valve 290 is an overflow valve, the oil can flow back to the fuel tank 210 through the overflow valve.

[0110] When the second control valve 290 is a second electronic valve, the second electronic valve is communicatively connected to an external control unit. The second electronic valve can obtain the oil pressure information detected by the second pressure sensor in real time. When the oil pressure detected by the second pressure sensor is greater than or equal to the first oil pressure threshold, the second electronic valve is opened; when the oil pressure detected by the second pressure sensor is less than the first oil pressure threshold, the second electronic valve is closed.

[0111] The technical effect provided by this embodiment is that when the thermostat device fails or the oil circuit is blocked, through the provided second control valve, the problem of damage to the lubrication system when the oil pressure is too high is avoided, and the oil can flow back to the fuel tank through the second control valve.

[0112] This application also provides a vehicle, such as a lubrication and cooling system of a power take-off as described in the above embodiment.

[0113] Specifically, a lubrication and cooling system of a power take-off is installed on the vehicle.

[0114] When the power of the special vehicle is required, the power take-off starts to work, and then the lubrication and cooling system of the power take-off also works accordingly.

[0115] A lubrication and cooling system of a power take-off provided by this embodiment can be used in a vehicle as described in the above embodiment. Its implementation principle and technical effect are similar, and will not be elaborated here in this embodiment.

[0116] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present application.

Claims

1. A lubrication and cooling system for a power take-off, characterized in that: The lubrication and cooling system of the power take-off includes: an oil tank, an oil pump, a temperature control device, an oil cooler and a power take-off; Wherein, the oil suction port of the oil pump is connected to the oil outlet of the oil tank, the oil outlet of the oil pump is connected to the oil inlet of the thermostat, the two oil outlets of the thermostat are respectively connected to the oil inlet of the power take-off and the oil inlet of the oil cooler, the oil outlet of the oil cooler is connected to the oil inlet of the power take-off, and the thermostat is used to control the lubricating oil to enter the oil cooler when the temperature of the lubricating oil entering the thermostat is greater than or equal to a preset temperature threshold, and / or, when the temperature of the lubricating oil entering the thermostat is less than a preset temperature threshold, control the lubricating oil to enter the power take-off; The oil outlet of the power take-off is connected to the oil return port of the oil tank.

2. The system according to claim 1, characterized in that The temperature-saving device comprises: a first temperature sensor, an internal controller, a first oil outlet and a second oil outlet, the first oil outlet is connected to the power take-off, the second oil outlet is connected to the oil cooler, the temperature sensor is communicatively connected to the internal controller, the temperature sensor is used to send the detected oil temperature to the internal controller, and the internal controller is used to control the lubricating oil to be output through the first oil outlet when the oil temperature is greater than or equal to a preset oil temperature threshold, and / or, when the oil temperature is less than the preset oil temperature threshold, control the lubricating oil to be output through the second oil outlet; A second temperature sensor is also arranged between the oil cooler and the power take-off. The first temperature sensor, the second temperature sensor, or at least one of the internal controller is also communicatively connected to an external control unit for sending abnormal oil temperature information to the external control unit when the detected oil temperature is greater than or equal to a preset oil temperature threshold.

3. The system according to claim 1, characterized in that A first oil circuit is provided between the oil suction port of the oil pump and the oil outlet of the oil tank, and an oil filter is provided on the first oil circuit.

4. The system according to claim 3, characterized in that A second oil circuit is also provided between the oil suction port of the oil pump and the oil outlet of the oil tank. A first control valve is provided on the second oil circuit. The first control valve is used to control whether the lubricating oil reaches the oil pump through the second oil circuit.

5. The system according to claim 4, characterized in that A first pressure sensor is also provided on the second oil circuit between the first control valve and the oil pump. The first pressure sensor is communicatively connected to an external control unit. When the absolute value of the negative pressure detected by the first pressure sensor is greater than or equal to a first negative pressure threshold, the first pressure sensor sends oil filter abnormality information to the external control unit.

6. The system according to claim 5, characterized in that The first control valve is a negative pressure valve or a first electronic valve. When the first control valve is the first electronic valve, the first electronic valve is communicatively connected to the external control unit. The external control unit opens the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is greater than or equal to a first negative pressure threshold, and / or closes the first electronic valve when the absolute value of the negative pressure detected by the first pressure sensor is less than the first negative pressure threshold.

7. The system according to any one of claims 1 to 5, characterized in that The oil outlet of the oil pump is also connected to the oil return port of the oil tank through a third oil circuit. A second control valve is also provided on the third oil circuit. The second control valve is used to control whether the lubricating oil returns to the oil tank through the third oil circuit.

8. The system according to claim 7, characterized in that A second pressure sensor is also provided on the third oil circuit between the oil pump and the second control valve. The second pressure sensor is also communicatively connected to an external control unit. When the oil pressure detected by the second pressure sensor is greater than or equal to a first oil pressure threshold, the second pressure sensor sends abnormal information of the thermostat to the external control unit.

9. The system according to claim 8, characterized in that The second control valve is a relief valve or a second electronic valve. When the second control valve is the second electronic valve, the second electronic valve is communicatively connected to an external control unit. The external control unit opens the second electronic valve when the oil pressure detected by the second pressure sensor is greater than or equal to a first oil pressure threshold, and / or closes the second electronic valve when the oil pressure detected by the second pressure sensor is less than the first oil pressure threshold.

10. A vehicle, characterized in that: A lubrication and cooling system comprising the power take-off according to any one of claims 1 to 9.

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