Harvester steering and header lifting electric control system

Abstract

The utility model discloses an electric control system for steering of a harvester and lifting of a header, and belongs to the technical field of agricultural machinery. An electric control operation device is connected with a steering controller, converts operation of a driver into signals and transmits the signals to the steering controller; the steering controller is respectively connected with the header lifting electromagnetic valve, the proportional electromagnetic relief valve and the left-right steering electromagnetic valve; after receiving the signal of the steering controller, the header lifting electromagnetic valve enables the header lifting oil cylinder to stretch out and draw back; the proportional electromagnetic overflow valve adjusts the overflow value by receiving different signals of the steering controller, changes the stroke of an ejector rod of the left-turning oil cylinder or the right-turning oil cylinder, and adjusts the turning radius. The left-right steering electromagnetic valve enables the left-turning oil cylinder or the right-turning oil cylinder to stretch out and draw back after receiving a signal of the steering controller. According to the utility model, by pressing the key or shifting the handle, the header is lifted, and the small turning and large turning functions are fixed, so that the operation is more convenient and humanized; meanwhile, integrated control over electric lifting and steering of the header is achieved, and the electric control degree is high.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, and more specifically to an electric control system for steering and lifting a harvester cutting platform. Background Art

[0002] With the advancement of science and technology, agricultural farming and harvesting have entered the era of mechanization. Especially for the harvesting of rice, the use of mechanized equipment, such as harvesters, can greatly reduce labor costs and labor intensity. Therefore, harvesters are widely used in agricultural harvesting.

[0003] While harvester technology has matured, it still lags behind in terms of ease of operation. For one thing, as harvester operating conditions become increasingly complex, problems such as complex steering mechanisms, choppy operation, and awkward handling have become increasingly prominent. Furthermore, rice harvesting typically requires small steering movements, and current harvesters on the market often struggle to achieve these small turns, reducing the user experience.

[0004] A search revealed patent authorization publication number CN 206691199 U, which discloses an automatic steering system for a crawler combine harvester. The application includes a left steering cylinder, a right steering cylinder, a two-position, two-way solenoid reversing valve, a three-position, four-way solenoid reversing valve, a hydraulic pump, a fuel tank, a switch, a steering controller, and a computer. Without changing the voltage across the electric proportional relief valve, the application adjusts the current flowing through the valve, adjusting the overflow value of the valve, adjusting the pressure in the electric hydraulic system, and changing the stroke of the steering cylinder's push rod to adjust the turning radius. While the application discloses the concept of using the electric proportional relief valve to adjust the overflow value to adjust the turning radius, it connects the steering controller's control interface to a computer, controlling the harvester's steering via the computer. This means that the adjustment of the overflow value of the electric proportional relief valve is designed on the computer itself, raising the operational barrier for drivers unfamiliar with computer operation and therefore limiting its practicality. Summary of the Invention

[0005] 1. Technical problems to be solved by the utility model

[0006] In view of the problems existing in the above-mentioned prior art, the utility model provides an electric control system for harvester steering and header lifting. The utility model is designed to lift the harvester header, make fixed small turns and steering of the harvester, and make large turns and steering of the harvester by pressing a button or toggling a handle, which makes the operation more convenient and humane. At the same time, the utility model realizes the integrated control of electric lifting and steering of the header, and has a high degree of electronic control.

[0007] 2. Technical solution

[0008] To achieve the above object, the technical solution provided by the present utility model is as follows:

[0009] An electric control system for the steering and header lifting of a harvester according to the present utility model includes a steering controller, an electric control operation device, a header lifting solenoid valve, a proportional electro-hydraulic relief valve, left and right steering solenoid valves, a left turning cylinder, a right turning cylinder, and a header lifting cylinder;

[0010] The electric control operation device is connected to the steering controller, and the electric control operation device converts the driver's operation into a signal and transmits it to the steering controller;

[0011] The steering controller is respectively connected to the header lifting solenoid valve, the proportional electro-hydraulic relief valve, and the left and right steering solenoid valves;

[0012] After receiving the signal from the steering controller, the header lifting solenoid valve is energized to control the oil supply, causing the header lifting cylinder to extend and retract;

[0013] The proportional electro-hydraulic relief valve adjusts the overflow value by receiving different signals from the steering controller, changes the stroke of the push rod of the left turning cylinder or the right turning cylinder, and adjusts the turning radius;

[0014] After receiving the signal from the steering controller, the left and right steering solenoid valves are energized to control the oil supply, causing the left turning cylinder or the right turning cylinder to extend and retract.

[0015] The electric control operation device is provided with a header up button, a header down button, a left small turning button, a right small turning button, and a left and right large turning control handle; the electric control operation device converts the actions of the driver's operation buttons or handles into signals and transmits them to the steering controller.

[0016] Furthermore, a steering angle sensor is connected to the left and right large turning control handle. The steering angle sensor swings with the left and right large turning control handle, records the swing angle of the left and right large turning control handle, and converts the recorded swing angle into a voltage signal and transmits it to the steering controller; the steering controller controls the actions of the proportional electro-hydraulic relief valve and the left and right steering solenoid valves according to the received different voltage signals.

[0017] Furthermore, the interface of the header lifting cylinder is connected to a hydraulic control check valve through a pipeline; the other end interface of the hydraulic control check valve is connected to the interface of the header lifting solenoid valve; the oil inlet of the header lifting solenoid valve is connected to the fuel tank through a hydraulic pump.

[0018] Furthermore, the oil inlet of the left-turn oil cylinder is connected to the one-way throttle valve through a pipeline, and then connected to the left oil supply interface of the left and right steering electromagnetic valves through a pipeline; the oil inlet of the right-turn oil cylinder is connected to the one-way throttle valve through a pipeline, and then connected to the right oil supply interface of the left and right steering electromagnetic valves through a pipeline; the oil return ports of the left-turn oil cylinder and the right-turn oil cylinder are connected to the proportional electro-hydraulic overflow valve through a pipeline; the other interface of the proportional electro-hydraulic overflow valve is connected to the fuel tank through a pipeline; the oil inlets of the left and right steering electromagnetic valves are connected to the fuel tank through a hydraulic pump; the oil return ports of the left and right steering electromagnetic valves are connected to the fuel tank through a pipeline.

[0019] Furthermore, the header lift electromagnetic valve and the left and right steering electromagnetic valves adopt three-position four-way electromagnetic reversing valves.

[0020] Furthermore, the hydraulic pump is connected to the oil inlet of the main overflow valve through a pipeline, the oil return port of the main overflow valve is connected to the oil return port of the header lift electromagnetic valve, and is connected to the fuel tank through a pipeline.

[0021] Furthermore, the main overflow valve adopts a constant-pressure overflow valve. When the pressure exceeds the set value, the main overflow valve relieves pressure to protect the hydraulic pump.

[0022] Furthermore, the electric control system uses a storage battery to supply power to the whole system, and the storage battery outputs 12V direct current.

[0023] Furthermore, the steering controller is connected to the instrument panel through a CAN communication interface, and the instrument panel is used for information and fault display.

[0024] 3. Beneficial effects

[0025] Adopting the technical solution provided by the present utility model, compared with the existing well-known technologies, it has the following beneficial effects:

[0026] (1) For the electric control system for the steering and header lift of a harvester of the present utility model, its electric control operation device is provided with a header lift button, a header lower button, a left small-turn button, a right small-turn button, and a left and right large-turn control handle. Through the left small-turn button and the right small-turn button, the harvester can perform fixed small-turn steering. By toggling the left and right large-turn control handle, large-turn steering can be performed. Through the header lift button and the header lower button, the header can be lifted and lowered. With such operations, the harvesting operation can be realized, the operation is convenient, the work efficiency is improved, and the operation is more user-friendly.

[0027] (2) The electric control system for the steering and cutter bar lifting of the harvester of the present utility model enables the harvester to add a small-turn steering function while achieving large-turn steering. By long-pressing the left small-turn button or the right small-turn button, the steering controller outputs a set fixed current signal to the proportional electro-hydraulic overflow valve. The proportional electro-hydraulic overflow valve converts the input current signal into a corresponding force in proportion to push the spool to move its position, thereby controlling the pressure and flow rate to change the rod stroke of the left-turn oil cylinder or the right-turn oil cylinder, realizing a small turning radius steering and meeting the requirement of small turning in the rice harvesting scenario.

[0028] (3) The electric control system for the steering and cutter bar lifting of the harvester of the present utility model adjusts the turning radius by the magnitude of the ADC signal position of the handle swing angle sensor, inputs the signal to the steering controller, and then the steering controller feeds back and calculates the output current magnitude to the proportional electro-hydraulic overflow valve to achieve the large-turn control of the harvester. The steering structure is simple, the operation mode is smooth, and the operation feel is good, improving the user experience.

[0029] (4) The electric control system for the steering and cutter bar lifting of the harvester of the present utility model realizes the integrated control of the electric lifting and steering of the cutter bar, with a high degree of electrification. Description of the Drawings

[0030] Figure 1 is the control scheme diagram of the steering and cutter bar lifting of the harvester of the present utility model;

[0031] Figure 2 is the control principle diagram of the steering and cutter bar lifting of the harvester of the present utility model;

[0032] Figure 3 is the hydraulic principle diagram of the steering and cutter bar lifting of the harvester of the present utility model.

[0033] Explanation of the reference numerals in the schematic diagram:

[0034] 1. Battery; 2. Steering controller; 3. Instrument panel; 4. Electric control operation device; 5. Steering angle sensor; 6. Cutter bar lifting solenoid valve; 61. Cutter bar lifting solenoid valve; 62. Cutter bar lowering solenoid valve; 7. Proportional electro-hydraulic overflow valve; 8. Left and right steering solenoid valves; 81. Left-turn solenoid valve; 82. Right-turn solenoid valve; 9. Main overflow valve; 10. Hydraulic pump; 11. Fuel tank; 12. One-way throttle valve; 13. Left-turn oil cylinder; 14. Right-turn oil cylinder; 15. Cutter bar lifting oil cylinder; 16. Hydraulic control check valve. Detailed Embodiment

[0035] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments.

[0036] An electric control system for the steering and header lifting of a harvester in this embodiment includes a storage battery 1, a steering controller 2, an instrument panel 3, an electric control operation device 4, a steering angle sensor 5, a header lifting solenoid valve 6, a proportional electro-hydraulic overflow valve 7, left and right steering solenoid valves 8, a main overflow valve 9, a hydraulic pump 10, a fuel tank 11, a one-way throttle valve 12, a left-turn oil cylinder 13, a right-turn oil cylinder 14, a header lifting oil cylinder 15, and a hydraulic control check valve 16.

[0037] Among them, the storage battery 1 is used to supply power to the entire system;

[0038] The steering controller 2 is the core drive control unit of the entire system, a chip-integrated controller;

[0039] The instrument panel 3 is used for information and fault display;

[0040] The electric control operation device 4 includes a header lifting button, left and right small steering buttons, and left and right large steering control handles;

[0041] The steering angle sensor 5 inputs a signal to the steering controller 2 through the ADC signal position size of the handle swing angle sensor, and then the steering controller 2 feeds back and calculates the output current size to the proportional electro-hydraulic overflow valve 7;

[0042] The header lifting solenoid valve 6 adopts a three-position four-way solenoid directional valve. After receiving a 12V voltage, the header lifting solenoid valve 6 is energized to control the oil supply, causing the header lifting oil cylinder 15 to extend and retract;

[0043] The proportional electro-hydraulic overflow valve 7 adjusts the overflow value of the proportional electro-hydraulic overflow valve 7 by receiving different currents, changes the rod stroke of the left-turn oil cylinder 13 or the right-turn oil cylinder 14, and adjusts the turning radius;

[0044] The left and right steering solenoid valves 8 adopt three-position four-way solenoid directional valves. After receiving a 12V voltage, the left and right steering solenoid valves 8 are energized to control the left-turn oil cylinder 13 or the right-turn oil cylinder 14;

[0045] The main overflow valve 9 adopts a constant pressure overflow valve. When the pressure exceeds the set value, it relieves pressure to protect the hydraulic pump 10.

[0046] The hydraulic pump 10 supplies oil to the valve body;

[0047] The fuel tank 11 stores hydraulic oil;

[0048] The one-way throttle valve 12 changes the throttle section to control the internal hydraulic oil flow;

[0049] The left-turn oil cylinder 13 provides left-turn steering;

[0050] The right-turn oil cylinder 14 provides right-turn steering;

[0051] The header lifting oil cylinder 15 is a single-acting oil cylinder, which is the oil cylinder for providing header lifting;

[0052] The pilot-operated check valve 16 can make the check valve flow in the reverse direction by relying on the control fluid pressure.

[0053] Combined with the following steering and header lift control schematic diagrams Figure 1 and the steering and header lift control principle diagrams Figure 2 and the steering and header lift hydraulic diagrams Figure 2 the present embodiment will be further described in detail.

[0054] Refer to Figure 3 , the oil inlet of the left-turning cylinder 13 is connected to the one-way throttle valve 12 through a pipeline, and then connected to the left-side oil supply interface of the left and right steering solenoid valves 8 through a pipeline; the oil inlet of the right-turning cylinder 14 is connected to the one-way throttle valve 12 through a pipeline, and then connected to the right-side oil supply interface of the left and right steering solenoid valves 8 through a pipeline. The oil return ports of the left-turning cylinder 13 and the right-turning cylinder 14 are connected to the proportional electro-hydraulic relief valve 7 through a pipeline. Another interface of the proportional electro-hydraulic relief valve 7 is connected to the fuel tank 11 through a pipeline. The oil inlets of the left and right steering solenoid valves 8 are connected to the hydraulic pump 10 through a pipeline; the hydraulic pump 10 is connected to the fuel tank 11 through a pipeline. The oil return ports of the left and right steering solenoid valves 8 are connected to the fuel tank 11 through a pipeline; the oil inlet of the main relief valve 9 is connected to the hydraulic pump 10 through a pipeline; the oil return port of the main relief valve 9 is connected to the fuel tank 11 through a pipeline. The interface of the header lift cylinder 15 is connected to the pilot-operated check valve 16 through a pipeline; the other end interface of the pilot-operated check valve 16 is connected to the interface of the header lift solenoid valve 6; the oil inlet of the header lift solenoid valve 6 is connected to the hydraulic pump 10 through a pipeline; the oil return port of the header lift solenoid valve 6 is connected to the fuel tank 11 through a pipeline.

[0055] Refer to Figure 2 , the storage battery 1 supplies power to the steering controller 2; one end of the instrument panel 3, the electric control operating device 4, the steering angle sensor 5, one end of the header lift solenoid valve 6, both ends of the proportional electro-hydraulic relief valve 7, and one end of the left and right steering solenoid valves 8 are respectively connected to the steering controller 2; the other ends of the header lift solenoid valve 6 and the left and right steering solenoid valves 8, and the electric control operating device 4 are connected to the harvester frame. The header lift solenoid valve 6 and the left and right steering solenoid valves 8 are separately represented by the header lift solenoid valve 61, the header lower solenoid valve 62, the left-turn solenoid valve 81 and the right-turn solenoid valve 82 in Figure 2 .

[0056] The specific control method is as follows:

[0057] Header lift control:

[0058] Long-press the header lift button on the electric control operating device 4, the steering controller 2 receives the lift signal, the steering controller 2 outputs a 12V voltage, the left side of the header lift solenoid valve 6 is energized, the left side of the header lift solenoid valve 6 supplies oil, the header lift cylinder 15 rises, and at this time the header rises; release the button to stop rising, and the cylinder maintains this position.

[0059] Reel lowering control:

[0060] Long - press the reel lowering button on the electric control operating device 4. The steering controller 2 receives the lowering signal, and the steering controller 2 outputs a 12V voltage. The right side of the reel lifting solenoid valve 6 is energized, and the right side of the reel lifting solenoid valve 6 supplies oil. The reel lifting oil cylinder 15 is subjected to the gravity of the reel. The pilot - operated check valve 16 relies on the control fluid pressure to make the check valve flow reversely. At this time, the reel descends; release the button to stop the descent, and the oil cylinder maintains this position.

[0061] Small left - turn steering:

[0062] Long - press the small left - turn steering button on the electric control operating device 4. The steering controller 2 receives the left - turn signal, and the steering controller 2 outputs a 12V voltage to the left end of the left - right steering solenoid valve 8. The left side of the left - right steering solenoid valve 8 supplies oil. The steering controller 2 outputs a set fixed current signal to the proportional electro - magnetic overflow valve 7. The proportional electro - magnetic overflow valve 7 converts the input current signal into a corresponding force to push the spool to move its position, thereby controlling the pressure and flow rate, adjusting the overflow value of the proportional electro - magnetic overflow valve 7, changing the rod stroke of the left - turn oil cylinder 13, and adjusting the left - turn radius, so that the combine harvester realizes small left - turn steering; release the button, the steering controller 2 receives the left - turn signal and disconnects, the left - right steering solenoid valve 8 is in the neutral position, and the hydraulic oil pumped out by the hydraulic pump 10 flows directly into the fuel tank 11 after passing through the left - right steering solenoid valve 8, and the combine harvester travels straight.

[0063] Small right - turn steering:

[0064] Long - press the small right - turn steering button on the electric control operating device 4. The steering controller 2 receives the right - turn signal, and the steering controller 2 outputs a 12V voltage to the right end of the left - right steering solenoid valve 8. The right side of the left - right steering solenoid valve 8 supplies oil. The steering controller 2 outputs a set fixed current signal to the proportional electro - magnetic overflow valve 7. The proportional electro - magnetic overflow valve 7 converts the input current signal into a corresponding force to push the spool to move its position, thereby controlling the pressure and flow rate, adjusting the overflow value of the proportional electro - magnetic overflow valve 7, changing the rod stroke of the right - turn oil cylinder 14, and adjusting the right - turn radius, so that the combine harvester realizes small right - turn steering; release the button, the steering controller 2 receives the right - turn signal and disconnects, the left - right steering solenoid valve 8 is in the neutral position, and the hydraulic oil pumped out by the hydraulic pump 10 flows directly into the fuel tank 11 after passing through the left - right steering solenoid valve 8, and the combine harvester travels straight.

[0065] Left - turn steering:

[0066] The steering angle sensor 5 is connected to the left and right large steering control levers. When the left and right large steering control levers are swung to the left, the steering angle sensor 5 swings to the left. The steering controller 2 receives the left-turn voltage signal from the steering angle sensor 5. Since the swinging angles of the left turn are different, the input left-turn signal voltage values are different. The steering controller 2 outputs 12V voltage to the left side of the left and right steering solenoid valves 8, and the left side of the left and right steering solenoid valves 8 supplies oil. The steering controller 2 analyzes and calculates by receiving different left-turn voltage signals from the steering angle sensor 5, and outputs corresponding current signals to the proportional electro-hydraulic overflow valve 7. The proportional electro-hydraulic overflow valve 7 converts the input current signal into a corresponding force in proportion to push the spool to move its position, thereby controlling the pressure and flow rate, adjusting the overflow value of the proportional electro-hydraulic overflow valve 7, changing the stroke of the push rod of the left-turn oil cylinder 13, adjusting the left-turning radius, and thus realizing the left turn of the harvester.

[0067] Since the swinging angles of the left turn of the left and right large steering control levers are different, the input left-turn signal voltage values to the steering controller 2 are different, the current signal sizes output by the steering controller 2 to the proportional electro-hydraulic overflow valve 7 are different, and the turning radius sizes of the harvester are different. When the left and right large steering control levers are kept in the neutral position, the steering controller 2 receives the left-turn signal and disconnects, the left and right steering solenoid valves 8 are in the neutral position, and the hydraulic oil pumped out by the hydraulic pump 10 flows directly into the fuel tank 11 after passing through the left and right steering solenoid valves 8, and the harvester travels straight.

[0068] Right turn steering:

[0069] When the left and right large steering control levers are swung to the right, the steering angle sensor 5 swings to the right. The steering controller 2 receives the right-turn voltage signal from the steering angle sensor 5. Since the swinging angles of the right turn are different, the input right-turn signal voltage values are different. The steering controller 2 outputs 12V voltage to the right side of the left and right steering solenoid valves 8, and the right side of the left and right steering solenoid valves 8 supplies oil. The steering controller 2 analyzes and calculates by receiving different right-turn voltage signals from the steering angle sensor 5, and outputs corresponding current signals to the proportional electro-hydraulic overflow valve 7. The proportional electro-hydraulic overflow valve 7 converts the input current signal into a corresponding force in proportion to push the spool to move its position, thereby controlling the pressure and flow rate, adjusting the overflow value of the proportional electro-hydraulic overflow valve 7, changing the stroke of the push rod of the right-turn oil cylinder 13, adjusting the right-turning radius, and thus realizing the right turn of the harvester.

[0070] Since the swinging angles of the right turn of the left and right large steering control levers are different, the input right-turn signal voltage values to the steering controller 2 are different, the current signal sizes output by the steering controller 2 to the proportional electro-hydraulic overflow valve 7 are different, and the turning radius sizes of the harvester are different. When the left and right large steering control levers are kept in the neutral position, the steering controller 2 receives the right-turn signal and disconnects, the left and right steering solenoid valves 8 are in the neutral position, and the hydraulic oil pumped out by the hydraulic pump 10 flows directly into the fuel tank 11 after passing through the left and right steering solenoid valves 8, and the harvester travels straight.

[0071] The above has schematically described the present utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present utility model, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present utility model.

Claims

1. An electric control system for the steering and header lifting of a harvester, comprising a left-turn oil cylinder (13), a right-turn oil cylinder (14) and a header lifting oil cylinder (15), characterized in that: It also includes a steering controller (2), an electric control operating device (4), a header lift solenoid valve (6), a proportional electro-hydraulic relief valve (7), and left and right steering solenoid valves (8); The electric control operating device (4) is connected to the steering controller (2), and the electric control operating device (4) converts the driver's operation into a signal and transmits it to the steering controller (2); The steering controller (2) is respectively connected to the header lift solenoid valve (6), the proportional electro-hydraulic relief valve (7), and the left and right steering solenoid valves (8); After receiving the signal from the steering controller (2), the header lift solenoid valve (6) is energized to control the oil supply, so that the header lift cylinder (15) extends and retracts; The proportional electro-hydraulic relief valve (7) adjusts the overflow value by receiving different signals from the steering controller (2), changes the rod stroke of the left turn cylinder (13) or the right turn cylinder (14), and adjusts the turning radius; After receiving the signal from the steering controller (2), the left and right steering solenoid valves (8) are energized to control the oil supply, so that the left turn cylinder (13) or the right turn cylinder (14) extends and retracts.

2. The electric control system for the steering and header lifting of a harvester according to claim 1, characterized in that: The electric control operating device (4) is provided with a header up button, a header down button, a left small turn button, a right small turn button, and a left and right large turn control handle; the electric control operating device (4) converts the actions of the driver's operation buttons or handles into signals and transmits them to the steering controller (2).

3. An electric control system for the steering and header lifting of a harvester according to claim 2, characterized in that: A steering angle sensor (5) is connected to the left and right large turn control handle. The steering angle sensor (5) swings with the left and right large turn control handle, records the swing angle of the left and right large turn control handle; and converts the recorded swing angle into a voltage signal and transmits it to the steering controller (2); the steering controller (2) controls the actions of the proportional electro-hydraulic relief valve (7) and the left and right steering solenoid valves (8) according to the received different voltage signals.

4. An electric control system for the steering and header lifting of a harvester according to any one of claims 1-3, characterized in that: The interface of the header lift cylinder (15) is connected to the hydraulic control check valve (16) through a pipeline; the other end interface of the hydraulic control check valve (16) is connected to the interface of the header lift solenoid valve (6); the oil inlet of the header lift solenoid valve (6) is connected to the fuel tank (11) through a hydraulic pump (10).

5. An electric control system for the steering and header lifting of a harvester according to claim 4, characterized in that: The oil inlet of the left turn cylinder (13) is connected to the one-way throttle valve (12) through a pipeline, and then connected to the left oil supply interface of the left and right steering solenoid valves (8) through a pipeline; the oil inlet of the right turn cylinder (14) is connected to the one-way throttle valve (12) through a pipeline, and then connected to the right oil supply interface of the left and right steering solenoid valves (8) through a pipeline; the oil return ports of the left turn cylinder (13) and the right turn cylinder (14) are connected to the proportional electro-hydraulic relief valve (7) through a pipeline; the other interface of the proportional electro-hydraulic relief valve (7) is connected to the fuel tank (11) through a pipeline; the oil inlet of the left and right steering solenoid valves (8) is connected to the fuel tank (11) through a hydraulic pump (10); the oil return port of the left and right steering solenoid valves (8) is connected to the fuel tank (11) through a pipeline.

6. An electric control system for the steering and header lifting of a harvester according to claim 5, characterized in that: The header lift solenoid valve (6) and the left and right steering solenoid valves (8) adopt three-position four-way electromagnetic directional valves.

7. An electric control system for the steering and header lifting of a harvester according to claim 5, characterized in that: The hydraulic pump (10) is connected to the oil inlet of the main relief valve (9) through a pipeline, the oil return port of the main relief valve (9) is connected to the oil return port of the header lift solenoid valve (6), and is connected to the fuel tank (11) through a pipeline.

8. An electric control system for the steering and header lifting of a harvester according to claim 7, characterized in that: The described main relief valve (9) adopts a constant pressure relief valve. When the pressure exceeds the set value, the main relief valve (9) relieves pressure to protect the hydraulic pump (10).

9. The electric control system for the steering and cutter bar lifting of a harvester according to claim 8, characterized in that: The described electric control system uses a storage battery (1) to supply power to the whole system, and the storage battery (1) outputs 12V direct current electricity.

10. The electric control system for the steering and header lifting of a harvester according to claim 9, characterized in that: The described steering controller (2) is connected to the instrument panel (3) through a CAN communication interface, and the instrument panel (3) is used for information and fault display.

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