Transfer case cooling device, control method thereof and crane

Abstract

The invention discloses a transfer case cooling device, a control method of the transfer case cooling device and a crane. A controller is connected with a displayer, the controller is connected with a fan of a radiator through a circuit provided with a relay, the controller is connected with an external electronic oil pump, and the controller is connected with a temperature sensor installed on a transfer case body; the power supply is connected with the temperature sensor; a gear pump is arranged in the transfer case and connected with an electronic oil pump through an oil inlet pipe 1, and the electronic oil pump is connected with a radiator through an oil inlet pipe 2. The transfer case is connected with the radiator through an oil way. The noise of the fan is reduced by controlling the rotating speed of the fan; transfer case high-temperature prompts are added through the displayer, and transfer case gear ablation is prevented; the display is additionally provided with a fault indicator lamp to prevent transfer case high temperature caused by failure of a fan motor; circulating branches are reduced, and a lubricating circulating system is simplified; the external electronic oil pump is additionally arranged, when the gear pump is damaged, the electronic pump can continue to work, and high temperature of the transfer case is prevented.

Description

Technical Field

[0001] The present invention relates to the field of cranes, and particularly to a transfer case cooling device, a control method thereof, and a crane, which are used for a crane whose transfer case needs heat dissipation. Background Art

[0002] A transfer case is a device that distributes the power of an engine, and can output power to the rear axle, or output power to the front / rear axles simultaneously. Under specific driving conditions, it automatically adjusts the power distribution between the front and rear axles to improve the passability and driving safety of the vehicle. During the operation of the transfer case, a large amount of heat is generated by the internal lubricating oil. If it is not dissipated in time, it will cause the transfer case to overheat, and then lead to ablation of the transfer case. Therefore, it is essential to add a cooling device to the transfer case.

[0003] The prior art is like a common crane transfer case cooling device. The transfer case dissipates heat mainly through air cooling. A four-way joint is connected at the oil outlet of the transfer case. Two ends of the joint are connected to oil pipes, and the other two ends are connected to a temperature control switch 1 and a temperature control switch 2. When the lubricating oil temperature reaches the preset temperature 1, the temperature control switch 1 closes, and the fan starts to rotate at a constant speed. When the lubricating oil temperature reaches the preset temperature 2, the temperature control switch 2 closes, and transmits the temperature signal to the display through the controller, and at the same time, a high-temperature alarm icon appears on the display.

[0004] However, the fan of this technology runs at the set maximum speed, resulting in high noise; when the temperature control switch fails, there is no relevant prompt for the high temperature of the transfer case, and there is a risk of ablation of the transfer case gears; once the fan motor fails, the fan does not rotate, which will cause the transfer case to overheat.

[0005] The prior art is like a circulation system, method and engineering vehicle for realizing lubrication of the transfer case of an engineering vehicle (CN118705356A), which provides a circulation system and method for realizing lubrication of the transfer case of an engineering vehicle: including a transfer case, a gear pump, a lubrication circulation system, an oil circuit switching valve and a control unit; the transfer case is connected to a power unit; the gear pump is connected to the transfer case; the lubrication circulation system includes a temperature sensor arranged on the transfer case, temperature sensors and pressure sensors on multiple circulation branches; the oil circuit switching valve is used to control the switching of the circulation branches of the lubrication circulation system; the control unit is connected to the power unit, the oil circuit switching valve, the temperature sensor and the pressure sensor. On the one hand, the present invention drives the lubrication circulation system based on predefined temperature data rules to realize the heating of the lubricating fluid, and on the other hand, monitors the states of components such as the transfer case, the gear pump, and the heat dissipation device in real time based on predefined pressure or temperature rules to realize fault prediction when the lubrication circulation system deviates from any one of the predefined rules.

[0006] However, this technology has many circulating branches, high resistance, and a complex system. There is only one gear pump as the power source of the circulating system. When the gear pump fails, there is a risk of high temperature in the transfer case.

[0007] Therefore, it is necessary to develop a new type of transfer case cooling device specifically to overcome the above problems. Summary of the Invention

[0008] Object of the Invention: Aiming at the deficiencies and defects of the existing technology, the present invention provides a transfer case cooling device, its control method, and a crane. By controlling the fan speed, the fan noise is reduced; the display adds a high-temperature prompt for the transfer case to prevent the gears in the transfer case from being ablated; the display adds a fault indicator light to prevent high temperature of the transfer case caused by the failure of the fan motor; the number of circulating branches is reduced to simplify the lubrication circulation system; an external electronic oil pump is added. When the gear pump is damaged, the electronic pump can continue to work to prevent high temperature of the transfer case.

[0009] Technical Solution: A transfer case cooling device of the present invention is characterized in that it includes a transfer case, a radiator, an electronic oil pump, a gear pump, an oil inlet pipe 1, an oil inlet pipe 2, an oil outlet pipe, a temperature sensor, a controller, a display, and a power supply; the controller is connected to the display, the controller is connected to the fan of the radiator through a circuit provided with a relay, the controller is connected to the external electronic oil pump, and the controller is connected to the temperature sensor installed on the transfer case body; the power supply is connected to the temperature sensor; a gear pump is provided inside the transfer case, the gear pump is connected to the electronic oil pump through the oil inlet pipe 1, and the electronic oil pump is connected to the radiator through the oil inlet pipe 2; the transfer case and the radiator are connected through an oil circuit.

[0010] Among them, the controller is connected to the fan of the radiator through an electrical signal.

[0011] Among them, the fan is provided with a motor.

[0012] Among them, the fan is provided with a ground wire.

[0013] Among them, the external electronic oil pump and the internal gear pump are connected in series. When one of the pumps is damaged, the other pump can work normally.

[0014] Among them, the controller transmits the oil temperature signal to the display, and the operation of the electronic oil pump is controlled by the oil temperature of the transfer case.

[0015] The usage method of the transfer case cooling device of the present invention is characterized in that during the driving of the vehicle, the engine transmits power to the transfer case, the input gear of the transfer case drives the internal lubricating oil pump to work, and the lubricating oil passes through the oil outlet of the transfer case and is connected to the oil inlet of the electronic oil pump through the oil inlet pipe 1. The oil outlet of the electronic oil pump is connected to the oil inlet of the transfer case radiator through the oil inlet pipe 2. The oil outlet of the transfer case radiator is connected to the oil return port of the transfer case through the oil return pipe; the temperature sensor is arranged on the transfer case body; the controller controls the operation of the electronic pump and the radiator fan according to the signal returned by the temperature sensor, and can also display the abnormal situation of the oil temperature through the display, giving the driver an intuitive feeling.

[0016] The control method of the transfer case cooling device of the present invention is characterized in that the use of the entire cooling device is controlled by 4 preset temperatures. The preset first temperature controls the operation of the radiator fan, the preset second temperature controls the operation of the electronic oil pump, the preset third temperature displays the oil temperature warning information, and the preset fourth temperature displays the high temperature alarm information.

[0017] Specifically, when the oil temperature of the transfer case is lower than the preset first temperature, the electronic oil pump does not work and the fan does not work either. The lubricating oil only enters the oil inlet of the radiator through the inside of the electronic oil pump; when the oil temperature reaches the preset first temperature, the oil temperature signal is transmitted to the controller, and the controller controls the radiator fan to start working; when the oil temperature reaches the preset second temperature, the controller transmits the signal to the electronic oil pump according to the oil temperature of the transfer case, and at this time the electronic oil pump works normally; the controller outputs a PWM signal to the motor driven by the fan according to the oil temperature, and the motor adjusts the fan speed according to the received PWM signal; when the oil temperature of the transfer case is greater than or reaches the preset third temperature, the fan works at the maximum speed, and the controller transmits the oil temperature signal to the display, and at the same time the display shows a warning icon; when the oil temperature of the transfer case is greater than or reaches the preset fourth temperature, the fan works at the maximum speed, and the controller transmits the oil temperature signal to the display, and at the same time the display shows a high temperature alarm icon;

[0018] If the controller does not receive the signal from the temperature sensor, the display lights up the fault indicator light, and at this time the fan works at the maximum speed; when the electronic oil pump fails, the temperature sensor has an open circuit or short circuit fault, the display lights up the fault indicator light, and at this time the fan works at the maximum speed; when the motor of the fan fails, the display lights up the fault indicator light.

[0019] A crane of the present invention is characterized in that the transfer case cooling device of the present invention is used.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: By controlling the fan speed, the fan noise is reduced; the display increases the prompt for the high temperature of the transfer case to prevent the gears of the transfer case from being ablated; the display increases the fault indicator light to prevent the high temperature of the transfer case caused by the failure of the fan motor; the circulation branch is reduced, and the lubrication circulation system is simplified; an external electronic oil pump is added. When the gear pump is damaged, the electronic pump can continue to work to prevent the high temperature of the transfer case. When the layout space of the radiator is limited, the heat dissipation effect is improved by increasing the flow rate of the lubricating medium. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a common crane transfer case cooling device in the prior art;

[0022] Figure 2 is a schematic structural diagram of the present invention;

[0023] Figure 3 is a schematic structural diagram of the control method of the present invention. Detailed Embodiments

[0024] The technical solutions of the present invention will be further described below in conjunction with the drawings and specific embodiments.

[0025] The crane of the present invention: a crane that needs to be transferred with pneumatic tires and a special chassis as the running chassis. Transfer case: a transmission device with functions such as power distribution and mode switching. Cooling device: a device with air cooling. Temperature sensor: a device for detecting the temperature of the lubricating oil.

[0026] As Figure 2 , the transfer case cooling device of the present invention includes a transfer case, a radiator, an electronic oil pump, a gear pump, an oil inlet pipe 1, an oil inlet pipe 2, an oil outlet pipe, a temperature sensor, a controller, a display and a power supply; the controller is connected to the display, the controller is connected to the fan of the radiator through a circuit provided with a relay, the controller is connected to the external electronic oil pump, and the controller is connected to the temperature sensor installed on the transfer case body; the power supply is connected to the temperature sensor; a gear pump is arranged inside the transfer case, the gear pump is connected to the electronic oil pump through the oil inlet pipe 1, and the electronic oil pump is connected to the radiator through the oil inlet pipe 2; the transfer case and the radiator are connected through an oil circuit. Among them, the controller is connected to the fan of the radiator through an electrical signal. The fan is provided with a motor. The fan is provided with a ground wire. The external electronic oil pump and the internal gear pump are connected in series. When one of the pumps is damaged, the other pump can work normally. The controller transmits the oil temperature signal to the display, and the operation of the electronic oil pump is controlled by the oil temperature of the transfer case.

[0027] Usage method of the transfer case cooling device of the present invention: During vehicle driving, the engine transmits power to the transfer case. The input gear of the transfer case drives the internal lubricating oil pump to work. The lubricating oil passes through the oil outlet of the transfer case and is connected to the inlet of the electronic oil pump through oil inlet pipe 1. The outlet of the electronic oil pump is connected to the inlet of the transfer case radiator through oil inlet pipe 2. The outlet of the transfer case radiator is connected to the oil return port of the transfer case through an oil outlet pipe. A temperature sensor is arranged on the transfer case body. The controller controls the operation of the electronic pump and the radiator fan according to the signal returned by the temperature sensor, and can also display the abnormal situation of the oil temperature through a display, giving the driver an intuitive feeling.

[0028] Such as Figure 3 , the control method of the transfer case cooling device of the present invention is characterized in that: the use of the entire cooling device is controlled by 4 preset temperatures. The preset first temperature controls the operation of the radiator fan, the preset second temperature controls the operation of the electronic oil pump, the preset third temperature displays the oil temperature warning information, and the preset fourth temperature displays the high temperature alarm information.

[0029] Specifically, when the oil temperature of the transfer case is lower than the preset first temperature, the electronic oil pump does not work and the fan does not work either. The lubricating oil only enters the inlet of the radiator through the inside of the electronic oil pump. When the oil temperature reaches the preset first temperature, the oil temperature signal is transmitted to the controller, and the controller controls the radiator fan to start working. When the oil temperature reaches the preset second temperature, the controller transmits a signal to the electronic oil pump according to the oil temperature of the transfer case, and at this time the electronic oil pump works normally. The controller outputs a PWM signal to the motor driven by the fan according to the oil temperature, and the motor adjusts the fan speed according to the received PWM signal. When the oil temperature of the transfer case is greater than or reaches the preset third temperature, the fan works at the maximum speed, and the controller transmits the oil temperature signal to the display, and at the same time the display shows a warning icon. When the oil temperature of the transfer case is greater than or reaches the preset fourth temperature, the fan works at the maximum speed, and the controller transmits the oil temperature signal to the display, and at the same time the display shows a high temperature alarm icon.

[0030] If the controller does not receive the signal from the temperature sensor, the display lights up the fault indicator light, and at this time the fan works at the maximum speed. When faults such as the failure of the electronic oil pump, the open circuit or short circuit of the temperature sensor occur, the display lights up the fault indicator light, and at this time the fan works at the maximum speed. When the motor of the fan fails, the display lights up the fault indicator light.

[0031] In the present invention, the electronic pump can be replaced with a gear pump. The gear pump or the output shaft of the directly-connected transfer case is connected to the output shaft of the transfer case through a transmission shaft, and a pneumatic control valve is added at the same time. When the oil temperature of the transfer case reaches the preset second temperature, the pneumatic control valve opens, the output shaft of the transfer case rotates, and drives the gear pump to operate. The number of fans driven by the radiator is changed from 1 to 2. If any one of the two fan motors is damaged, the other fan works at the maximum speed. The heat dissipation power source of the transfer case can be externally connected, and the power source can be either electrically controlled or pneumatically controlled. The rotation speed of the radiator fan can be automatically adjusted according to the oil temperature.

[0032] In the present invention, by controlling the rotation speed of the fan, the fan noise is reduced; a high-temperature prompt for the transfer case is added to the display to prevent the gears of the transfer case from being ablated; a fault indicator light is added to the display to prevent the transfer case from overheating caused by the failure of the fan motor; the circulation branch is reduced to simplify the lubrication circulation system; an external electronic oil pump is added. When the gear pump is damaged, the electronic pump can continue to work to prevent the transfer case from overheating. When the layout space of the radiator is limited, the heat dissipation effect is improved by increasing the flow rate of the lubricating medium.

Claims

1. A transfer case cooling device, characterized in that: It includes a transfer case, a radiator, an electric oil pump, a gear pump, an inlet pipe 1, an inlet pipe 2, an outlet pipe, a temperature sensor, a controller, a display, and a power supply; the controller is connected to the display, the controller is connected to the fan of the radiator through a circuit provided with a relay, the controller is connected to the external electric oil pump, and the controller is connected to the temperature sensor installed on the transfer case body; the power supply is connected to the temperature sensor; a gear pump is provided inside the transfer case, the gear pump is connected to the electric oil pump through the inlet pipe 1, and the electric oil pump is connected to the radiator through the inlet pipe 2; the transfer case and the radiator are connected through an oil circuit.

2. The transfer case cooling device according to claim 1, wherein: The controller is electrically connected to the fan of the radiator.

3. The transfer case cooling device according to claim 1, wherein: The fan is provided with a motor.

4. The transfer case cooling device according to claim 1, wherein: The fan is provided with a ground wire.

5. The transfer case cooling device according to claim 1, wherein: The external electric oil pump and the internal gear pump are connected in series. When one of the pumps is damaged, the other pump can work normally.

6. The transfer case cooling device according to claim 1, wherein: The controller transmits the oil temperature signal to the display, and the operation of the electric oil pump is controlled by the oil temperature of the transfer case.

7. The method of using the transfer case cooling device according to any one of claims 1-6, characterized in that: During vehicle driving, the engine transmits power to the transfer case, the input gear of the transfer case drives the internal lubricating oil pump to work, the lubricating oil passes through the outlet of the transfer case and is connected to the inlet of the electric oil pump through the inlet pipe 1, the outlet of the electric oil pump is connected to the inlet of the transfer case radiator through the inlet pipe 2, and the outlet of the transfer case radiator is connected to the oil return port of the transfer case through the outlet pipe; the temperature sensor is arranged on the transfer case body; the controller controls the operation of the electric pump and the radiator fan according to the signal returned by the temperature sensor, and can also display the abnormal situation of the oil temperature through the display, giving the driver an intuitive feeling.

8. The control method of the transfer case cooling device according to any one of claims 1-6, characterized in that: The use of the entire cooling device is controlled by 4 preset temperatures. The preset first temperature controls the operation of the fan of the radiator, the preset second temperature controls the operation of the electric oil pump, the preset third temperature displays the oil temperature warning information, and the preset fourth temperature displays the high temperature alarm information.

9. The control method of the transfer case cooling device according to claim 8, wherein: When the oil temperature of the transfer case is less than the preset first temperature, the electric oil pump does not work and the fan does not work either. The lubricating oil only enters the inlet of the radiator through the inside of the electric oil pump; when the oil temperature reaches the preset first temperature, the oil temperature signal is transmitted to the controller, and the controller controls the fan of the radiator to start working; when the oil temperature reaches the preset second temperature, the controller transmits a signal to the electric oil pump according to the oil temperature of the transfer case, and at this time the electric oil pump works normally; the controller outputs a PWM signal to the motor driven by the fan according to the oil temperature, and the motor adjusts the fan speed according to the received PWM signal; when the oil temperature of the transfer case is greater than or reaches the preset third temperature, the fan works at the maximum speed, and the controller transmits the oil temperature signal to the display, and at the same time the display shows a warning icon; When the oil temperature of the transfer case is greater than or reaches the preset fourth temperature, the fan works at the maximum speed, the controller transmits the oil temperature signal to the display, and at the same time the display shows a high temperature alarm icon; If the controller does not receive the signal from the temperature sensor, the display lights up the fault indicator light, and at this time the fan works at the maximum speed; when the electric oil pump fails, the temperature sensor has an open circuit or short circuit fault, the display lights up the fault indicator light, and at this time the fan works at the maximum speed; when the motor of the fan fails, the display lights up the fault indicator light.

10. A crane, characterized in that: Use the transfer case cooling device according to any one of claims 1-6.

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