Fresh corn full-hydraulic variable driving system

Abstract

The utility model relates to the technical field of full-hydraulic variable driving systems, in particular to a fresh corn full-hydraulic variable driving system, which comprises an engine, a transfer case, a walking pump and a fan pump, a transfer case is arranged at the output end of the engine; a walking pump and a fan pump are respectively arranged at the output end of the transfer case; a walking motor is arranged at the output end of the walking pump; a gearbox is arranged at the output end of the walking motor. The walking speed is controlled through the closed loop electric proportion PWM technology, a traditional stepless speed change and oil cylinder control mode is abandoned, the walking speed is linearly changed through PWM electric proportion control, and the defects that speed control is not accurate, operation is tedious, and the failure rate is high are overcome; the two-gear four-speed design gives consideration to low-speed operation accuracy and high-speed transition efficiency, and meets various operation and transition requirements.

Description

Technical Field

[0001] This utility model relates to the technical field of fully hydraulic variable drive systems, and in particular to a fully hydraulic variable drive system for fresh corn. Background Technology

[0002] In the current era of rapid agricultural mechanization, the efficient operation of corn harvesters is of great significance for improving corn harvesting efficiency and reducing farmers' labor intensity. Among them, the drive adjustment system, as the core part of the corn harvester, directly affects the overall operating performance and adaptability of the machine. At present, most corn harvesters use continuously variable transmission (CVT) and hydraulic cylinder control adjustment methods. Although CVT can achieve speed adjustment to a certain extent, it has the problem of insufficient precision in output speed. This makes it difficult for the harvester to maintain the optimal operating speed when facing complex terrain and different crop growth conditions, affecting harvesting efficiency and quality. Hydraulic cylinder control adjustment is relatively cumbersome. The operator needs to frequently operate multiple control elements to adjust relevant parameters, which not only increases labor intensity but also easily leads to operational failures due to operational errors. Furthermore, both of these adjustment methods have a high failure rate during long-term use due to component wear and hydraulic system leakage. Frequent maintenance not only increases operating costs but also delays farming time.

[0003] In addition, during the milk stage of sweet corn, the spacing between plants varies. Traditional corn header parameters have a narrow adjustment range and cannot flexibly adapt to these complex changes in plant spacing. This often results in problems such as missed cuts and cuts, causing food waste and greatly limiting the application of corn harvesters in sweet corn harvesting scenarios. It is difficult to meet the needs of agricultural modernization for precise, efficient, and adaptable harvesting operations. Utility Model Content

[0004] To overcome the problems of inaccurate output speed, cumbersome operation, and high failure rate in existing corn harvesters that use continuously variable transmission and hydraulic cylinder control, and the narrow parameter adjustment range of traditional headers due to the diverse spacing between plants during the milk stage of sweet corn, which makes the machine unable to adapt to complex scenarios, this utility model provides a fully hydraulic variable drive system for sweet corn.

[0005] The technical solution is as follows: A fully hydraulic variable displacement drive system for fresh corn includes an engine, a transfer case, a travel pump, and a blower pump; the engine output is equipped with a transfer case; the transfer case outputs a travel pump and a blower pump; the travel pump output is equipped with a travel motor; the travel motor output is equipped with a gearbox; the gearbox output is equipped with a travel output; the blower pump output is equipped with a blower motor; the travel pump output is equipped with a header pump; the header pump output is equipped with a header motor; and the electrical control units of the travel motor, travel pump, blower pump, and header pump are equipped with PLC controllers.

[0006] Furthermore, the engine drives the transfer case and distributes power to the travel pump, blower pump, and header pump, which in turn drive the travel motor, blower motor, and header motor, respectively.

[0007] Furthermore, the PLC controller uses PWM electro-proportional control to linearly adjust the flow rate of the travel pump, thereby linearly adjusting the speed of the travel motor.

[0008] Furthermore, the high and low speed switches of the travel motor cover a range of 0-8km / h for the low speed setting and 0-31km / h for the second speed setting, while the high speed setting covers a range of 0-11km / h for the first speed setting and 0-37km / h for the second speed setting, forming a "two-speed, four-speed" configuration that ensures both the accuracy of low-speed operations and the efficiency of high-speed transfers.

[0009] Furthermore, the PLC controller uses PWM electro-proportional control to adjust the discharge of the header pump, enabling the header motor speed to be linearly adjusted within the range of 0-600 r / min. This allows for flexible adjustment of the header's cutting and conveying operation rhythm, adapting to different plant spacings and achieving a wide range of parameter adjustments.

[0010] Furthermore, the PLC controller uses PWM electro-proportional control to linearly adjust the speed of the fan motor within the range of 0-1800 r / min.

[0011] Furthermore, the PLC controller uses PWM proportional control output, and the operating current of the PLC controller is between 800-1200mA.

[0012] The beneficial effects are as follows: This utility model controls the walking speed through closed-loop electro-proportional PWM technology. The engine's power is transmitted to the walking pump via the transfer case. The walking pump is regulated by the PWM signal output by the PLC controller to achieve linear flow rate adjustment, which in turn drives the walking motor to linearly adjust its speed. Combined with the high and low speed control switches of the walking motor, the walking output end achieves a "two-speed, four-gear" adjustment function (low speed gears include 0-8km / h and 0-31km / h, and high speed gears include 0-11km / h and 0-37km / h), thus completing the walking function. It abandons the traditional continuously variable transmission and hydraulic cylinder control modes. The PWM electro-proportional control allows for linear changes in walking speed, providing precise control and simple operation, solving the drawbacks of inaccurate speed control, cumbersome operation, and high failure rate. The "two-speed, four-gear" design balances the accuracy of low-speed operation with the efficiency of high-speed transfer, adapting to diverse operation and transfer needs.

[0013] By adjusting the displacement of the variable displacement piston pump using PWM control technology, the engine power is transmitted to the header pump via the transfer case. The header pump's displacement changes with the PWM signal, controlling the header motor speed linearly within the range of 0-600 r / min. This allows for a wide range of flexible adjustments to header operating parameters. Addressing the issue of varying plant spacing in the milk-ripe stage of sweet corn, PWM control enables a wide and flexible adjustment of header operating parameters, adapting to different plant spacing scenarios and overcoming the narrow adjustment range of traditional header parameters. Furthermore, using PWM electro-proportional control technology, the engine power is transmitted to the blower pump via the transfer case. The blower pump, controlled by the PWM signal, drives the blower motor speed linearly within the range of 0-1800 r / min. The blower is driven by a hydraulic system to achieve the blower's impurity removal function. Compared to traditional blower impurity removal systems, PWM electro-proportional control combined with hydraulic drive linearly adjusts the blower speed, reducing unnecessary power consumption and heat generation, simplifying the control process, and avoiding problems such as high power consumption, high heat generation, cumbersome control, and low reliability, thus improving system reliability and energy efficiency. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the overall power transmission path of this utility model;

[0015] Figure 2 This is a three-dimensional structural diagram of the transfer case of this utility model;

[0016] Figure 3 This is a schematic diagram of the dual-condition three-dimensional structure of the walking output end of this utility model;

[0017] Figure 4 This is a schematic diagram of the dual-condition three-dimensional structure of the fan motor of this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of the cutting table motor of this utility model.

[0019] In the attached diagram, the following are the reference numerals: 1. Engine; 2. Transfer case; 3. Travel pump; 4. Travel motor; 5. Fan pump; 6. Cutting platform pump; 7. Fan motor; 8. Gearbox; 9. Cutting platform motor; 10. Travel output terminal; 11. PLC controller. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0021] Example 1

[0022] like Figures 1-5As shown, the fresh corn fully hydraulic variable drive system includes an engine 1, a transfer case 2, a travel pump 3, and a blower pump 5; the output end of the engine 1 is equipped with the transfer case 2; the output ends of the transfer case 2 are respectively equipped with the travel pump 3 and the blower pump 5; the output end of the travel pump 3 is equipped with a travel motor 4; the output end of the travel motor 4 is equipped with a gearbox 8; the output end of the gearbox 8 is equipped with a travel output end 10; the output end of the blower pump 5 is equipped with a blower motor 7; the output end of the travel pump 3 is equipped with a header pump 6; the output end of the header pump 6 is equipped with a header motor 9; the input ends of the electrical control units of the travel motor 4, the travel pump 3, the blower pump 5, and the header pump 6 are equipped with a PLC controller 11.

[0023] Engine 1 drives transfer case 2 and distributes power to travel pump 3, blower pump 5, and header pump 6. Travel pump 3, blower pump 5, and header pump 6 drive travel motor 4, blower motor 7, and header motor 9, respectively.

[0024] The PLC controller 11 uses PWM electro-proportional control to linearly adjust the flow rate of the walking pump 3, thereby linearly adjusting the speed of the walking motor 4.

[0025] The high and low speed switches of the travel motor 4 cover the range of 0-8km / h for speed 1 and 0-31km / h for speed 2, while the high speed covers the range of 0-11km / h for speed 1 and 0-37km / h for speed 2, forming a "two-speed, four-speed" system that ensures both the accuracy of low-speed operation and the efficiency of high-speed transfer.

[0026] The PLC controller 11 controls the discharge of the header pump 6 via PWM electro-proportional control, enabling the speed of the header motor 9 to be linearly adjusted within the range of 0-600 r / min. This allows for flexible adjustment of the header's cutting, conveying, and other operational rhythms, adapting to different plant spacings and achieving a wide range of parameter adjustments.

[0027] The PLC controller 11 uses PWM electro-proportional control to linearly adjust the speed of the fan pump 5 within the range of 0-1800 r / min.

[0028] The walking speed is controlled by closed-loop electro-proportional PWM technology. The power of engine 1 is transmitted to walking pump 3 through transfer case 2. Walking pump 3 is regulated by the PWM signal output by PLC controller 11 to achieve linear change adjustment of flow rate, which drives the walking motor 4 to linearly adjust the speed. Combined with the high and low speed control switches of walking motor 4, the walking output terminal 10 can realize the "two-speed, four-gear" adjustment function. The low speed range includes 0-8km / h and 0-31km / h, and the high speed range includes 0-11km / h and 0-37km / h, thus completing the walking function. It abandons the traditional continuously variable transmission and cylinder control mode. PWM electro-proportional control makes the walking speed change linearly, with precise control and simple operation, solving the drawbacks of inaccurate speed control, cumbersome operation, and high failure rate. The "two-speed, four-gear" design takes into account the accuracy of low-speed operation and the efficiency of high-speed transfer, adapting to various operation and transfer needs.

[0029] By adjusting the displacement of the variable displacement piston pump using PWM control technology, the power of engine 1 is transmitted to header pump 6 via transfer case 2. The displacement of header pump 6 changes with the PWM signal, controlling the speed of header motor 9 to be linearly adjusted within the range of 0-600 r / min. This allows for a wide range of flexible adjustments to header operating parameters. Addressing the issue of varying plant spacing in fresh corn during the milk-ripe stage, PWM control enables a wide range of flexible adjustments to header operating parameters, adapting to different plant spacing scenarios and overcoming the narrow adjustment range of traditional header parameters. Furthermore, using PWM electro-proportional control technology, the power of engine 1 is transmitted to blower pump 5 via transfer case 2. Blower pump 5 is controlled by the PWM signal, driving the speed of blower motor 7 to be linearly adjusted within the range of 0-1800 r / min. The blower is driven by a hydraulic system to achieve the blower's impurity removal function. Compared to traditional blower impurity removal systems, PWM electro-proportional control combined with hydraulic drive linearly adjusts the blower speed, reducing unnecessary power consumption and heat generation, simplifying the control process, and avoiding problems such as high power consumption, high heat generation, cumbersome control, and low reliability, thus improving system reliability and energy efficiency.

[0030] Example 2

[0031] Based on Example 1, such as Figures 1-5 As shown, the PLC controller 11 uses PWM proportional control output, and the operating current of the PLC controller 11 is between 800-1200mA.

[0032] The PLC controller 11 uses PWM electro-proportional control to adjust the displacement of the header pump 6 variable displacement plunger pump, allowing the header motor 9 speed to change linearly within the range of 0-600 r / min. This enables flexible adjustment of the header's cutting, conveying, and other operational rhythms, adapting to different plant spacings and achieving "wide-range parameter adjustment".

Claims

1. A fully hydraulic variable displacement drive system for fresh corn, comprising an engine (1), characterized in that: It also includes a transfer case (2), a travel pump (3), and a blower pump (5); the output end of the engine (1) is equipped with a transfer case (2); the output ends of the transfer case (2) are respectively equipped with a travel pump (3) and a blower pump (5); the output end of the travel pump (3) is equipped with a travel motor (4); the output end of the travel motor (4) is equipped with a gearbox (8); the output end of the gearbox (8) is equipped with a travel output end (10); the output end of the blower pump (5) is equipped with a blower motor (7); the output end of the travel pump (3) is equipped with a cutting platform pump (6); the output end of the cutting platform pump (6) is equipped with a cutting platform motor (9); the input end of the electrical control unit of the travel motor (4), the travel pump (3), the blower pump (5), and the cutting platform pump (6) is equipped with a PLC controller (11).

2. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The engine (1) drives the transfer case (2) and distributes the power to the travel pump (3), the blower pump (5), and the cutter pump (6). The travel pump (3), the blower pump (5), and the cutter pump (6) drive the travel motor (4), the blower motor (7), and the cutter motor (9) respectively.

3. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The PLC controller (11) uses PWM electro-proportional control to linearly adjust the flow rate of the walking pump (3), thereby linearly adjusting the speed of the walking motor (4).

4. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The high and low speed switches of the walking motor (4) cover the range of 0-8km / h for the first gear and the range of 0-31km / h for the second gear. The high speed switches cover the range of 0-11km / h for the first gear and the range of 0-37km / h for the second gear.

5. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The PLC controller (11) controls the displacement of the cutting platform pump (6) through PWM electro-proportional control, so that the speed of the cutting platform motor (9) can be linearly adjusted within the range of 0-600 r / min.

6. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The PLC controller (11) controls the fan pump (5) via PWM electro-proportional control, so that the speed of the fan motor (7) can be linearly adjusted within the range of 0-1800 r / min.

7. The fully hydraulic variable displacement drive system for fresh corn according to claim 1, characterized in that: The PLC controller (11) uses PWM proportional control output, and the operating current of the PLC controller (11) is between 800-1200mA.

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