Hydraulic fan reversing structure of tractor

Abstract

The utility model provides a hydraulic fan reversing structure of a tractor, which comprises a hydraulic reversing fan and a fan reversing solenoid valve, the front side of a hydraulic oil tank is connected with an oil suction filter, and the oil outlet end of the oil suction filter is connected with the oil inlet end of a gear pump through a pipeline; the oil outlet end of the gear pump is connected with the oil inlet end of the fan reversing electromagnetic valve through a pipeline, one group of the oil outlet ends of the fan reversing electromagnetic valve is connected with the hydraulic reversing fan through a pipeline, the other group of the oil outlet ends of the fan reversing electromagnetic valve is connected with the diverter valve through a pipeline, and the diverter valve is connected with the radiator and the hydraulic oil tank. The hydraulic reversing fan is arranged on one side of the radiator. An original common fan is replaced by the hydraulic reversing fan, the small oil cylinder is arranged on the hydraulic reversing fan, the fan blades can be pushed to change the inclination angle of the fan blades, and therefore blown wind can blow away weeds, straw and other objects attached to the machine cover.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a hydraulic fan reversing structure for tractors. Background Technology

[0002] With the rapid development of high-horsepower tractors, the agricultural implements they drive are becoming increasingly larger, such as rotary tillers, hydraulic reversible plows, and balers. The existing hydraulic cooling system structure of tractors is as follows: Figure 3 As shown: The gearbox acts as the oil tank for the entire system. The gear pump pumps hydraulic oil through an oil suction filter into the radiator, where it circulates for cooling before returning to the gearbox, forming a complete system. This structure has the following shortcomings:

[0003] 1. Tractors operate in harsh environments. Ordinary fans are designed to cool the engine, so the air blows backward. Weeds and straw in the field can easily adhere to the hood, blocking the mesh. This prevents the outside air from reaching the inside, making it easier for the engine or the entire machine to overheat and cause mechanical failure.

[0004] 2. This type of mechanism requires manual cleaning by the user at regular intervals. This results in less operating time and reduced work efficiency.

[0005] 3. It has no advantage compared to competitors, resulting in limited user choices and impacting sales.

[0006] Therefore, it is necessary to develop a reasonable tractor steering oil tank structure. Utility Model Content

[0007] The present invention aims to provide a tractor hydraulic fan reversing structure to overcome or at least partially solve the above-mentioned problems.

[0008] To achieve the above objectives, the technical solution of this utility model is specifically implemented as follows:

[0009] This utility model provides a hydraulic fan reversing structure for a tractor, including a hydraulic oil tank, a gear pump, a radiator, and an oil suction filter. It also includes a hydraulic reversing fan and a fan reversing solenoid valve. The oil suction filter is connected to the front of the hydraulic oil tank. The oil outlet of the oil suction filter is connected to the oil inlet of the gear pump via a pipeline. The oil outlet of the gear pump is connected to the oil inlet of the fan reversing solenoid valve via a pipeline. The fan reversing solenoid valve has two sets of oil outlets: one set is connected to the hydraulic reversing fan via a pipeline, and the other set is connected to a flow divider valve via a pipeline. The flow divider valve is connected to both the radiator and the hydraulic oil tank. Two pipelines are provided between the flow divider valve and the radiator: one pipeline sends hydraulic oil into the radiator, and the other pipeline returns hydraulic oil to the hydraulic oil tank. The gear pump is located on one side of the hydraulic oil tank, and the hydraulic reversing fan is located on one side of the radiator.

[0010] As a further embodiment of this utility model, a right side plate is fixedly connected to the right side of the heat dissipation device, and the fan reversing solenoid valve is disposed on the front side of the right side plate.

[0011] As a further embodiment of this invention, the fan reversing solenoid valve is connected to an electrical switch via a wire.

[0012] As a further embodiment of this utility model, the fan reversing solenoid valve is also connected to an overflow valve, which is connected to the rear axle cover plate through a pipeline, and the rear axle cover plate is fixedly installed on the hydraulic oil tank.

[0013] This utility model provides a tractor hydraulic fan reversing structure, which has the following advantages:

[0014] 1. Replace the original ordinary fan with a hydraulic commutator fan. The hydraulic commutator fan has a small oil cylinder that can push the fan blades to change their tilt angle, so that the air blown out is forward and blows away weeds, straw and other things attached to the machine cover.

[0015] 2. A fan reversing solenoid valve is connected in series between the gear pump and the radiator to serve the entire system. It is controlled by an electrical switch with one button to prevent the user from forgetting to reset it in time, which would cause the whole system to overheat.

[0016] 3. Connect the solenoid valve oil return pipe to the rear axle cover plate to avoid damage to the valve body structure and radiator oil leakage caused by high pressure of the solenoid valve.

[0017] 4. Compared with the previous version, the functions have been increased, which brings certain convenience to product sales. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram illustrating the working principle of this utility model.

[0021] Figure 3 This is a diagram of an existing tractor hydraulic cooling system.

[0022] In the diagram: 1. Hydraulic oil tank; 2. Rear axle cover plate; 3. Gear pump; 4. Hydraulic reversing fan; 5. Radiator; 6. Right side plate; 7. Suction oil filter; 8. Fan reversing solenoid valve; 9. Electrical switch; 10. Ordinary fan. Detailed Implementation

[0023] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0024] See Figure 1 and Figure 2 This utility model provides a tractor hydraulic fan reversing structure, including a hydraulic oil tank 1, a gear pump 3, a radiator 5, and an oil suction filter 7. It also includes a hydraulic reversing fan 4 and a fan reversing solenoid valve 8. The oil suction filter 7 is connected to the front side of the hydraulic oil tank 1. The oil outlet of the oil suction filter 7 is connected to the oil inlet of the gear pump 3 through a pipeline. The oil outlet of the gear pump 3 is connected to the oil inlet of the fan reversing solenoid valve 8 through a pipeline. The oil outlet of the fan reversing solenoid valve 8 is provided with two sets. One set is connected to the hydraulic reversing fan 4 through a pipeline, and the other set is connected to a diverter valve through a pipeline. The diverter valve is connected to the radiator 5 and the hydraulic oil tank 1 respectively. Two pipelines are provided between the diverter valve and the radiator 5. One pipeline sends hydraulic oil into the radiator 5, and the other pipeline returns hydraulic oil to the hydraulic oil tank 1. The gear pump 3 is located on one side of the hydraulic oil tank 1, and the hydraulic reversing fan 4 is located on one side of the radiator 5.

[0025] The right side of the heat sink is fixedly connected to the right side plate 6, and the fan reversing solenoid valve 8 is located on the front side of the right side plate 6.

[0026] The fan reversing solenoid valve 8 is connected to the electrical switch 9 via a wire and is used to control the opening and closing of the fan reversing solenoid valve 8.

[0027] An overflow valve is also connected to the fan reversing solenoid valve 8. The overflow valve is connected to the rear axle cover plate 2 through a pipeline, and the rear axle cover plate 2 is fixedly installed on the hydraulic oil tank 1 for easy control of oil pressure.

[0028] In operation, the gearbox serves as the oil tank for the entire system. The engine transmits torque to the gear pump 3 via splines, causing the gear pump 3 to rotate. Energy transformation occurs within the gear pump 3; the mechanical energy transmitted by the engine is converted into hydraulic energy, output as flow and pressure. Hydraulic oil pumped from the hydraulic tank 1 by the gear pump 3 flows to the fan reversing solenoid valve 8 via pipelines. Two scenarios occur: 1. During normal operation, the hydraulic oil flows back into the radiator 5, circulates for cooling, and then returns to the hydraulic tank 1; 2. When fan reversal is required, pressing the electrical switch 9 activates the fan reversing solenoid valve 8, directing hydraulic oil into the hydraulic reversing fan 4. This pushes the cylinders within the fan, changing the fan blade angle and altering the airflow direction, blowing away debris adhering to the engine hood. When the oil pressure reaches 18.5 ± 0.5 bar or higher, the overflow valve on the fan reversing solenoid valve 8 opens, allowing excess hydraulic oil to flow back into the hydraulic tank 1 through the rear axle cover plate 2. It is worth noting that the fan reversing function should not be left on for a long time, so electrical switch 9 should be normally open, that is, it will spring back after the button is released, thus stopping the fan reversing.

[0029] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A hydraulic fan reversing structure for a tractor, comprising a hydraulic oil tank (1), a gear pump (3), a radiator (5), and an oil suction filter (7), characterized in that, It also includes a hydraulic reversing fan (4) and a fan reversing solenoid valve (8). The front side of the hydraulic oil tank (1) is connected to an oil suction filter (7). The oil outlet of the oil suction filter (7) is connected to the oil inlet of the gear pump (3) through a pipeline. The oil outlet of the gear pump (3) is connected to the oil inlet of the fan reversing solenoid valve (8) through a pipeline. The oil outlet of the fan reversing solenoid valve (8) is provided with two sets. One set is connected to the hydraulic reversing fan (4) through a pipeline, and the other set is connected to the diverter valve through a pipeline. The diverter valve is connected to the radiator (5) and the hydraulic oil tank (1) respectively. There are two pipelines between the diverter valve and the radiator (5). One pipeline sends the hydraulic oil into the radiator (5), and the other pipeline returns the hydraulic oil to the hydraulic oil tank (1). The gear pump (3) is located on one side of the hydraulic oil tank (1), and the hydraulic reversing fan (4) is located on one side of the radiator (5).

2. The tractor hydraulic fan reversing structure according to claim 1, characterized in that, The right side of the heat sink is fixedly connected to a right side plate (6), and the fan reversing solenoid valve (8) is located on the front side of the right side plate (6).

3. The tractor hydraulic fan reversing structure according to claim 1, characterized in that, The fan reversing solenoid valve (8) is connected to the electrical switch (9) via a wire.

4. The tractor hydraulic fan reversing structure according to claim 3, characterized in that, The fan reversing solenoid valve (8) is also connected to an overflow valve, which is connected to the rear axle cover plate (2) through a pipeline, and the rear axle cover plate (2) is fixedly installed on the hydraulic oil tank (1).

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