Transfer case protection system

Abstract

The utility model discloses a transfer case protection system, which belongs to the field of engine control of engineering machinery and comprises a transfer case, a power pump and a radiator which are sequentially connected and circularly arranged, and the transfer case is connected with an engine; a pressure detection assembly used for detecting the pressure of gear oil is arranged on a gear oil circulation path between the power pump and the radiator. And the control assembly is electrically connected with the pressure detection assembly and the engine. The pressure detection assembly is arranged on the gear oil circulation path and electrically connected with the control assembly and the engine, and therefore real-time monitoring and feedback control over the pressure of the gear oil of the transfer case are achieved. When the pressure is abnormal, the control assembly can respond in time and control the engine, damage to the transfer case caused by insufficient gear oil is avoided, the equipment reliability is remarkably improved, and the shutdown maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of engine control for engineering machinery, and specifically relates to a transfer case protection system. Background Technology

[0002] In the field of construction machinery, the transfer case, as a key component for power distribution, is widely used in large equipment such as excavators and loaders. Proper lubrication of the gears inside the transfer case is crucial for its reliable operation. However, if gear oil leaks during operation and lubrication fails, the transfer case gears will be damaged within a short period, causing equipment downtime. Traditional transfer case lubrication systems typically rely solely on mechanical structures to maintain gear oil circulation, lacking effective real-time monitoring methods.

[0003] In the prior art, for example, Chinese Patent No. CN2931799Y discloses an automatic shutdown device for internal combustion engines when the oil pressure is low. The fuel tank, first fuel supply pipe, diesel filter, second fuel supply pipe, solenoid valve, high-pressure oil pump, and high-pressure oil pipe constitute a fuel supply system. The pressure indicating valve, main lubrication oil passage, power supply, first wire, second wire, and solenoid valve constitute a control circuit. The solenoid valve is a normally open solenoid valve, which controls the fuel supply and is also controlled by the control circuit. Under normal lubrication conditions, the main lubrication oil passage is in a normally open state without power. Only when the oil pressure is low will the solenoid valve be energized to cut off the fuel supply system.

[0004] These technologies are primarily safety measures designed to prevent engine damage, and no monitoring methods have been designed specifically for transfer case protection.

[0005] In view of the above, this application is hereby submitted. Utility Model Content

[0006] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a transfer case protection system. This invention is achieved through the following technical solution:

[0007] A transfer case protection system includes: a transfer case, a power pump, and a radiator connected in sequence and arranged in a cycle, wherein the transfer case is connected to an engine;

[0008] A pressure detection component for detecting gear oil pressure is provided on the gear oil circulation path between the power pump and the radiator.

[0009] It also includes a control component, which is electrically connected to the pressure detection component and the engine, respectively.

[0010] Preferably, the pressure detection component is a pressure switch, which is installed on the gear oil circulation path and sends a signal to the control component when the gear oil pressure is lower than a set value.

[0011] Preferably, the pressure detection component is a pressure sensor, which is installed in the gear oil pipeline between the power pump and the radiator to collect the pressure value of the gear oil pipeline in real time.

[0012] Preferably, it also includes a back pressure valve, which is disposed on the gear oil circulation path and located between the pressure detection component and the radiator.

[0013] Preferably, the smaller of the pressures borne by the transfer case and the radiator is set as the system minimum, and the spring pressure of the back pressure valve is set to 70% of the system minimum.

[0014] Preferably, the oil suction port of the power pump is located inside the transfer case at a distance of 1 / 3 of the total height from the bottom of the transfer case.

[0015] Preferably, the control component is a controller, which receives pressure signals from the pressure detection component and controls the engine to start and stop.

[0016] Preferably, the pressure detection component and the control component are connected via wired or wireless means.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. By installing a pressure detection component along the gear oil circulation path and electrically connecting it to the control component and engine, real-time monitoring and feedback control of the transfer case gear oil pressure are achieved. When the pressure is abnormal, the control component can respond promptly and control the engine, preventing transfer case damage due to insufficient gear oil, significantly improving equipment reliability and reducing downtime maintenance costs.

[0019] 2. Using a pressure switch as the detection element, it has a simple structure and low cost. It can quickly send a switch signal when the gear oil pressure is lower than the safety threshold, triggering the control components to act and achieving rapid protection of the transfer case. It is especially suitable for scenarios with high requirements for response speed.

[0020] 3. The application of pressure sensors enables continuous and accurate measurement of gear oil pressure, providing richer pressure data. Control components can make more precise judgments and decisions based on real-time pressure values, avoiding the lag of traditional mechanical detection methods and further improving the system's safety and stability. Attached Figure Description

[0021] Figure 1 This is a connection diagram of this utility model;

[0022] Figure 2 This is a schematic diagram of the existing technology setup.

[0023] In the diagram: 1. Engine; 2. Transfer case; 3. Power pump; 4. Radiator; 5. Pressure sensor; 6. Controller; 7. Back pressure valve. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, this embodiment provides a transfer case protection system, including: a transfer case 2, a power pump 3 and a radiator 4 connected in sequence and arranged in a cycle, wherein the transfer case 2 is connected to an engine 1;

[0026] A pressure detection component for detecting gear oil pressure is provided on the gear oil circulation path between the power pump 3 and the radiator 4.

[0027] It also includes a control component, which is electrically connected to the pressure detection component and the engine 1, respectively.

[0028] By installing a pressure detection component along the gear oil circulation path and electrically connecting it to the control component and engine 1, real-time monitoring and feedback control of the gear oil pressure in the transfer case 2 are achieved. When the pressure is abnormal, the control component can respond promptly and control engine 1, preventing damage to the transfer case 2 due to insufficient gear oil, significantly improving equipment reliability and reducing downtime maintenance costs. Figure 2 The biggest difference in the existing technology shown is the addition of a pressure detection component to ensure the normal operation of the transfer case 2.

[0029] The pressure detection component is a pressure switch, which is installed on the gear oil circulation path. When the gear oil pressure is lower than a set value, it sends a signal to the control component. Using a pressure switch as the detection element is simple in structure and low in cost. It can quickly send a switching signal when the gear oil pressure is lower than the safety threshold, triggering the control component to act and achieving rapid protection of the transfer case 2. It is especially suitable for scenarios with high requirements for response speed.

[0030] However, pressure switches can only provide signals for controlling on / off states and cannot provide accurate oil pressure measurement results. Therefore, preferably, the pressure detection component is a pressure sensor 5, which is installed in the gear oil pipeline between the power pump 3 and the radiator 4 to collect the pressure value of the gear oil pipeline in real time.

[0031] The application of pressure sensor 5 enables continuous and accurate measurement of gear oil pressure, providing richer pressure data. The control components can make more precise judgments and decisions based on real-time pressure values, avoiding the lag of traditional mechanical detection methods and further improving the system's safety and stability.

[0032] Furthermore, the transfer case protection system also includes a back pressure valve 7, which is located on the gear oil circulation path and between the pressure detection component and the radiator 4.

[0033] The back pressure valve 7 stabilizes the pressure downstream of the pressure detection component, preventing false detections caused by pressure fluctuations. Simultaneously, by placing it between the pressure detection component and the radiator 4, it ensures that the pressure detection component measures a pressure value that accurately reflects the system status, improving the accuracy of the monitoring data.

[0034] Preferably, the smaller of the pressures borne by the transfer case 2 and the radiator 4 is set as the system minimum, and the spring pressure of the back pressure valve 7 is set to 70% of the system minimum. Setting the spring pressure of the back pressure valve 7 to 70% of the system minimum pressure ensures stable system pressure under normal operating conditions while providing sufficient detection margin for abnormal pressure changes. When the pressure falls below this set value, potential leakage risks can be detected in a timely manner, protecting system safety while avoiding accidental shutdowns due to oversensitivity.

[0035] More preferably, the oil suction port of the power pump 3 is located inside the transfer case 2 at one-third of its total height from the bottom. This location allows for early detection of pressure changes before the gear oil level drops to a dangerous level. Compared to traditional bottom-suction designs, this structure provides earlier warnings of insufficient oil levels, extending the warning time and giving operators more time to respond. Since the power pump 3 cannot build up pressure unless it draws oil, it avoids situations where the oil is almost completely drained before an alarm is triggered. If the oil level has already reached the bottom, the transfer case 2 will have already been damaged for some time, increasing equipment losses.

[0036] The control component is controller 6, which receives pressure signals from the pressure detection component and controls the start and stop of engine 1. Specifically, controller 6 is the control component; when the pressure is lower than a set value, the pressure detection component sends a signal to controller 6, and controller 6 controls engine 1 to stop.

[0037] By processing pressure signals, not only can simple start-stop control be achieved, but also advanced functions such as graded early warning and fault diagnosis can be supported, further improving the system's intelligence level and protection capabilities.

[0038] Preferably, the pressure detection component and the control component are connected via wired or wireless means. Supporting both wired and wireless connections enhances the system's flexibility and adaptability. Wired connections ensure stable signal transmission and are suitable for environments with complex conditions and strong electromagnetic interference; wireless connections simplify installation and wiring, reduce construction costs, and facilitate system upgrades, modifications, and remote monitoring and management.

[0039] Specifically, a pressure detection component is installed on the gear oil circulation path between the power pump 3 and the radiator 4 to continuously monitor the gear oil pressure. If a pressure switch is used, it will activate and send a signal to the control component when the gear oil pressure is lower than a preset value; if a pressure sensor 5 is used, it will collect the pressure value of the gear oil pipeline in real time and transmit the pressure data to the control component.

[0040] After receiving the pressure signal from the pressure detection component, the controller 6 analyzes and judges it. When the pressure signal is less than the preset pressure value, the controller 6 determines that the gear oil pressure is abnormal and immediately sends a stop command to the engine 1 to stop the engine 1 from running, so as to prevent the transfer case 2 from being damaged due to insufficient gear oil and lubrication failure.

[0041] Back pressure valve 7 is positioned between the pressure detection component and the radiator 4, with its spring set pressure set at 70% of the lower pressure value experienced by the transfer case 2 and the radiator 4. During gear oil circulation, back pressure valve 7 stabilizes the pressure downstream of the pressure detection component, preventing false detections caused by pressure fluctuations and ensuring that the pressure value measured by the pressure detection component accurately reflects the system status. The suction port of power pump 3 is located inside the transfer case 2 at one-third of its total height from the bottom. When the gear oil level drops to this position, power pump 3 has difficulty suctioning oil and cannot build up pressure. The pressure detection component can quickly detect the pressure change, providing an earlier warning compared to traditional bottom suction designs, thus buying more time for equipment protection.

[0042] The pressure detection component and the control component can be connected via wired or wireless means. Wired connections ensure stable transmission of pressure signals even in complex electromagnetic interference environments; wireless connections simplify the installation and wiring process, reduce construction costs, and facilitate system upgrades and remote monitoring and management. Users can choose flexibly according to their actual usage scenarios.

Claims

1. A transfer case protection system, characterized in that, include: A transfer case (2), a power pump (3), and a radiator (4) are sequentially connected and arranged in a cycle. The transfer case (2) is connected to an engine (1). A pressure detection component for detecting gear oil pressure is provided on the gear oil circulation path between the power pump (3) and the radiator (4); It also includes a control component that is electrically connected to the pressure detection component and the engine (1), respectively.

2. The transfer case protection system according to claim 1, characterized in that, The pressure detection component is a pressure switch, which is installed on the gear oil circulation path. When the gear oil pressure is lower than the set value, it sends a signal to the control component.

3. The transfer case protection system according to claim 1, characterized in that, The pressure detection component is a pressure sensor (5), which is installed in the gear oil pipeline between the power pump (3) and the radiator (4) to collect the pressure value of the gear oil pipeline in real time.

4. A transfer case protection system according to claim 3, characterized in that, It also includes a back pressure valve (7), which is located on the gear oil circulation path and between the pressure detection assembly and the radiator (4).

5. A transfer case protection system according to claim 4, characterized in that, The smaller of the pressures borne by the transfer case (2) and the radiator (4) is set as the system minimum, and the spring pressure of the back pressure valve (7) is set to 70% of the system minimum.

6. A transfer case protection system according to claim 4, characterized in that, The oil suction port of the power pump (3) is located inside the transfer case (2) at 1 / 3 of the total height from the bottom of the transfer case (2).

7. A transfer case protection system according to any one of claims 1-6, characterized in that, The control component is a controller (6), which receives the pressure signal from the pressure detection component and controls the engine (1) to start and stop.

8. A transfer case protection system according to any one of claims 1-6, characterized in that, The pressure detection component and the control component are connected via wired or wireless means.

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