Harvesting machine electric control clutch control system and control method

Abstract

An electric control clutch control system of a harvesting machine comprises a motor, a controller, a handle, an angle sensor and a mechanical transmission structure, and the angle sensor is connected with the handle and used for detecting a handle rotation signal and transmitting the handle rotation signal to the controller; the controller receives a signal from the angle sensor and communicates with an engine ECU, and the rotating speed of the engine is adjusted to be within a preset range according to a request of the controller; meanwhile, the driving motor drives the mechanical transmission structure to act; the mechanical transmission mechanism is connected with the clutch device and controls connection / disconnection of threshing and harvesting power transmission.

Description

Technical Field

[0001] The invention relates to the field of mechanical control, and in particular to an electric clutch control system and a control method for a harvester. Background Art

[0002] In the operation of agricultural machinery, the threshing, harvesting and other operations of the harvester usually require the clutch to control the power connection / disconnection of the corresponding function. The drive motor is controlled by operating the handle lever, and the motor pulls the belt. The tension and relaxation of the belt makes the engine power and the operating parts connected / disconnected. Since the threshing and harvesting processes of the harvester require frequent operation of the corresponding handle levers, and the operations between the handle levers have a logical sequence, and in order to have sufficient power after the load is connected, the power output of the engine needs to be increased to avoid stalling due to insufficient engine power during the power connection process; when the engine speed is too high, the clutch belt wears more during the connection process, reducing the service life of the clutch system.

[0003] A single control function and control system can no longer meet the needs of modern agricultural development. In order to improve the operating efficiency and convenience of agricultural machinery, it is necessary to develop a threshing and harvesting logic control system. At the same time, when the clutch of the control system is engaged with the engine, the engine speed is automatically adjusted within the range according to the power request, which can ensure that the clutch does not stall during the engagement process and at the same time prevent excessive power from causing serious belt wear. Summary of the invention

[0004] A harvester electric clutch control system, comprising a motor, a controller, a handle, an angle sensor and a mechanical transmission structure, characterized in that: The angle sensor is connected to the handle and is used to detect the handle rotation signal and transmit it to the controller; The controller receives the signal from the angle sensor and communicates with the engine ECU, and the engine speed is adjusted to a preset range according to the controller request; at the same time, the drive motor drives the mechanical transmission structure to move; The mechanical transmission mechanism is connected to the clutch device to control the connection / disconnection of threshing and harvesting power transmission.

[0005] The engine speed regulation during the clutch device power connection process includes: when the engine speed is idling, the speed increases with the increase of the angle sensor signal to avoid stalling due to insufficient power during the clutch device engagement process; when the threshing power is connected and reaches a stable state, the engine speed is synchronously increased to the maximum value range to provide sufficient power for the load; when the harvesting power is connected and reaches a stable state, the engine speed increases slightly or remains within the maximum range.

[0006] When the engine speed is greater than the preset range, the speed decreases as the angle sensor signal increases. When the threshing power is connected and reaches a stable state, the engine speed is synchronously reduced to the preset range to reduce belt wear.

[0007] Furthermore, the angle sensor signal is a voltage signal.

[0008] Furthermore, the handle shell is provided with two gears, threshing and harvesting, and an anti-error limit is provided between the gears.

[0009] Furthermore, the control system also includes a second angle sensor, which is connected to the mechanical transmission structure and is used to detect the operating signal of the mechanical transmission structure and feed it back to the controller. The controller determines whether the mechanical transmission structure operates normally. If not, the controller controls the motor to stop working to protect the system.

[0010] Preferably, the mechanical transmission structure includes a support, a rotating shaft connected to a motor, a small gear, a large gear and a cam, a threshing control arm and a harvesting control arm. The rotation of the gear and / or the cam drives the rotation of the control arm. One end of the control arm is connected to a clutch device through a cable, and the power connection / disconnection of the corresponding function is controlled by the tensioning and relaxation of the cable.

[0011] Control method of harvester electronic clutch control system: S1: The controller receives the first signal from the angle sensor, communicates with the engine ECU via the CAN bus, and the engine speed is adjusted to a preset range according to the power request; The driving motor rotates to drive the mechanical transmission structure to move, the threshing clutch device to move, the threshing belt to tighten, and the threshing drum to rotate and connect the power; S2: Receive the second signal from the angle sensor, drive the motor to rotate and drive the mechanical transmission structure to move, the harvesting clutch device to move, the harvesting belt to tighten, and the harvesting table operation power is connected.

[0012] Furthermore, the angle sensor signal is a voltage signal, and the engine speed regulation includes: when the engine speed is idling, the speed increases as the first signal increases, so as to avoid stalling due to insufficient power during the engagement of the clutch device; when the threshing power is connected and reaches a stable state, the engine speed increases to a maximum value range, so as to provide sufficient power for the load.

[0013] Furthermore, when the harvesting power is connected and reaches a stable state, the engine speed increases with the second signal, increases slightly or remains within a maximum range.

[0014] Furthermore, the engine speed regulation also includes: when the engine speed is greater than a preset range, the speed decreases as the first signal increases, and the engine speed is synchronously reduced to a preset range during the threshing power connection and reaching a stable state, thereby reducing belt wear.

[0015] Furthermore, the control method of the harvester's electronically controlled clutch system also includes receiving a second angle sensor signal to determine whether the mechanical transmission structure is operating normally. If not, controlling the motor to stop working to protect the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 , is a schematic structural diagram of an embodiment of an electronically controlled clutch control system of the present invention; Figure 2 , is a schematic diagram of the corresponding relationship between the handle gear position and the working function of the present invention. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The words "first", "second" and similar words used in the specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish the relationship between multiple identical components and other different components; the terms "installed", "connected" and "connected" in the present invention should be understood in a broad sense; words such as "clockwise" and "counterclockwise" indicating orientation or positional relationship are only for the convenience of describing the present invention, and do not mean that the components must have a specific orientation or be constructed in a specific orientation.

[0018] As shown in Figure 1, in one embodiment, the harvester electronic clutch control system includes a motor, a controller, a handle, an angle sensor and a mechanical transmission structure. The handle is electrically connected to the first angle sensor. The first angle sensor inputs the monitored handle rotation angle to the controller in the form of an electrical signal. The electrical signal is a voltage signal. Preferably, the voltage signal range is 2.5V~5V, and there is a linear relationship between the voltage signal and the handle rotation angle. The controller determines the handle action based on the acquired first angle sensor signal and communicates with the engine ECU. The engine speed is adjusted to a preset range as requested by the controller. Preferably, the preset engine speed is 1200~1500r / min to ensure that sufficient power is provided for the load. At the same time, when the starting speed is too high, the engine speed is reduced to a preset range as requested by the controller to avoid excessive speed and severe belt wear during the clutch device engagement process.

[0019] Specifically, when the controller obtains the first signal of the angle sensor, i.e., the signal that the handle bar moves from the middle position to the threshing position, the controller communicates with the engine ECU through the bus. If the current engine speed is idle, the speed increases with the increase of the angle sensor signal to avoid stalling due to insufficient power during the clutch device engagement process. The controller drives the motor to drive the mechanical transmission structure to move, so that the threshing pulley is gradually tightened, the threshing drum power is connected and reaches stability, and the engine speed is synchronously increased to the maximum value range to provide sufficient power for the load. When the controller obtains the second signal of the angle sensor, i.e., the signal that the handle bar moves from the threshing position to the harvesting position, the drive motor rotates to drive the mechanical transmission structure to move, so that the harvesting pulley is gradually tightened, and the power of the cutting table operation is gradually connected and tends to be stable. Because the power transmission of the cutting table operation is a two-stage transmission, its power is transmitted from the threshing power. When the controller obtains the second signal of the angle sensor, the engine speed increases slightly with the increase of the second signal or remains in the maximum value range.

[0020] If the engine speed is greater than the preset range when the controller obtains the first signal of the angle sensor, the controller requests the engine speed to decrease through the bus. The engine speed decreases as the angle sensor signal increases. The threshing power is connected and the engine speed is reduced to the preset range during reaching a stable state, thereby reducing belt wear. If the engine speed is within the preset range when the controller obtains the first signal of the angle sensor, the speed is maintained within the range only by fine-tuning.

[0021] Similarly, the control logic preset by the controller also includes that when the controller detects that the handle moves from the harvesting position to the threshing position, that is, when the controller detects that the voltage signal decreases in the opposite direction, the controller communicates with the engine ECU through the bus, reduces the engine speed to make the harvesting clutch separate more smoothly, and when the threshing clutch is completely separated, the engine speed is reduced to the minimum range, and power is provided for the harvester to run at idle speed to ensure that the engine does not stall.

[0022] Furthermore, in one embodiment, the electronic clutch control system also includes a second angle sensor, which is installed on the outside of the mechanical transmission structure, monitors the angle and direction of mechanical rotation, and feeds back to the controller. The controller receives the feedback from the second angle sensor to determine whether the mechanical transmission structure is operating normally. If normal, it indicates that the operation of the mechanical transmission structure has reached the specified position; if it cannot reach the specified position for a long time or the motor current exceeds the safety threshold, the drive motor will stop working to protect the system.

[0023] In one embodiment, the two gear positions on the handle correspond to the threshing and harvesting operation functions respectively, and the middle position corresponds to the separation of the clutch device, and the operation power is cut off. Figure 2As shown, the handle bar extends out of the housing with gears, and there are anti-error limiters between the gears of the housing. The handle bar cannot be moved to the harvesting position in one step, and must first reach the threshing position to start the threshing drum before moving to the harvesting position; or the harvesting operation must be stopped first, and then the threshing operation is stopped. Through the two-stage transmission design between the handle device and the clutch device pulley, that is, the threshing belt is first tightened and then the harvesting belt is tightened through the two-stage transmission, the corresponding operation function power is connected, so as to avoid the threshing drum stopping and blocking when the harvester header is still working.

[0024] The mechanical transmission structure includes a support, a rotating shaft connected to a motor, a small gear, a large gear, a cam and a control arm. The rotation of the gear and / or the cam drives the rotation of the control arm. One end of the control arm is connected to a clutch device through a cable. The clutch action is controlled by the tensioning and relaxing of the cable, thereby tensioning / relaxing the belt and connecting / disconnecting the power of the corresponding function.

[0025] Control method of harvester electronic clutch control system: S1: The controller receives the first signal from the angle sensor, communicates with the engine ECU via the CAN bus, and the engine speed is adjusted to a preset range according to the power request; The driving motor rotates to drive the mechanical transmission structure to move, the threshing clutch device to move, the threshing belt to tighten, and the threshing drum to rotate and connect the power; S2: Receive the second signal from the angle sensor, drive the motor to rotate and drive the mechanical transmission structure to move, the harvesting clutch device to move, the harvesting belt to tighten, and the harvesting table operation power is connected.

[0026] The angle sensor signal is a voltage signal, and there is a linear relationship between the voltage signal and the handle rotation angle. The engine speed regulation during the clutch device engagement process includes: when the speed is idle, the speed increases as the angle sensor signal increases, and the engine speed increases to a maximum value range during the threshing power connection and reaching a stable state. Preferably, the speed range is 1200~1500r / min, providing sufficient power for the load.

[0027] When the handle bar continues to move from the threshing position to the harvesting position, the controller receives the second signal from the angle sensor, the drive motor rotates to drive the mechanical transmission structure to move, the harvesting clutch device is activated, the harvesting belt is tightened, the harvesting platform operation power is connected, and the engine speed increases with the second signal, increases slightly or remains within the maximum value range.

[0028] If the controller obtains the first signal of the angle sensor and the engine speed is greater than the preset range, the controller requests the engine speed to decrease through the bus, and the engine speed decreases as the angle sensor signal increases. The threshing power is connected and the engine speed decreases to the preset range during the stable state, reducing belt wear. If the controller obtains the first signal of the angle sensor and the engine speed is within the preset range, the speed is kept within the range only by fine-tuning.

[0029] Furthermore, the control method of the harvester's electronically controlled clutch system also includes receiving a second angle sensor signal to determine whether the mechanical transmission structure is operating normally. If not, controlling the motor to stop working to protect the system.

[0030] The two-in-one electric clutch control system of the present invention makes the harvesting and threshing operations of the harvester simple and effective through the limit design of the control handle, the control strategy design, and the clutch device and the control strategy cooperate with each other. At the same time, the controller communicates with the engine ECU, and the engine speed is adjusted to a preset range according to the load request, ensuring that there is sufficient power input when the threshing and harvesting clutches are engaged and will not stall, while avoiding excessive power and excessive belt wear during the clutch device engagement process. In addition, the speed is reduced when the clutch device is separated, ensuring that the separation process is smoother, reducing belt wear, and improving the operating efficiency and reliability of agricultural machinery.

Claims

1. A harvester electronic clutch control system, comprising a motor, a controller, a handle, an angle sensor and a mechanical transmission structure, characterized in that: The angle sensor is connected to the handle and is used to detect the handle rotation signal and transmit it to the controller; The controller receives the signal from the angle sensor and communicates with the engine ECU, and the engine speed is adjusted to a preset range according to the controller request, while the drive motor drives the mechanical transmission structure to move; The mechanical transmission mechanism is connected to the clutch device to control the connection / disconnection of threshing and harvesting power transmission.

2. The harvester electronic clutch control system according to claim 1, characterized in that: The engine speed regulation includes: when the speed is at idle speed, it increases with the increase of the angle sensor signal, and when the threshing power is connected and reaches a stable state, the engine speed increases synchronously to a maximum value range.

3. The harvester electronic clutch control system according to claim 2, characterized in that: Engine speed regulation also includes: when the harvesting power is connected and reaches a stable state, the engine speed increases slightly or remains within the maximum range.

4. The harvester electronic clutch control system according to claim 1, characterized in that: When the engine speed is greater than the preset range, the speed decreases as the angle sensor signal increases. When the threshing power is connected and reaches a stable state, the engine speed is synchronously reduced to the preset range to reduce belt wear.

5. The harvester electronic clutch control system according to claim 1, characterized in that: The control system also includes a second angle sensor connected to the mechanical transmission structure and used for detecting operation information of the mechanical transmission structure and feeding back the information to the controller.

6. The harvester electronic clutch control system according to claim 1, characterized in that: The handle shell is provided with two gears of threshing and harvesting, and an anti-error limit is provided between the gears.

7. A control method for an electronically controlled clutch system of a harvester, comprising: S1: The controller receives the first signal from the angle sensor, communicates with the engine ECU via the CAN bus, and the engine speed is adjusted to a preset range according to the power request; The driving motor rotates to drive the mechanical transmission structure to move, the threshing clutch device to move, the threshing belt to tighten, and the threshing drum to rotate and connect the power; S2: Receive the second signal from the angle sensor, drive the motor to rotate and drive the mechanical transmission structure to move, the harvesting clutch device to move the harvesting belt to tighten, and the power of the harvesting table operation is connected.

8. The harvester electronic clutch control method according to claim 7, characterized in that: The engine speed regulation includes: when the speed is at idle speed, the speed increases as the first signal increases, and is regulated to a maximum value range.

9. The harvester electronic clutch control method according to claim 7, characterized in that: The engine speed regulation includes: when the engine speed is greater than a preset range, the speed decreases as the first signal increases, and is adjusted to the preset range.

10. The harvester electronic clutch control method according to claim 7, characterized in that: The control method of the harvester's electronically controlled clutch system also includes receiving a second angle sensor signal to determine whether the mechanical transmission structure operates normally. If not, controlling the motor to stop working to protect the system.

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