JP2563682B2 - Combine speed controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine that travels in a field to mow a crop and harvests a grain from a grain culm of the crop, and particularly suppresses or promotes movement of the grain culm in a handling chamber by changing an angle. The present invention relates to a vehicle speed control device for increasing or decreasing a vehicle speed according to a load state on an engine in a combine equipped with a threshing device having a dust delivery valve.

[0002]

2. Description of the Related Art When a combine harvester is used to mow a crop in a field, it is necessary to adjust the cutting height of the harvesting section and a number of adjustments such as adjusting the vehicle speed of the combine, and the operation of the combine is not easy. For this reason, conventionally, there has been a vehicle equipped with a vehicle speed control device for automatically controlling the vehicle speed during the harvesting work in order to facilitate the operation of the combine. This combine vehicle speed control device detects the engine speed during the mowing operation, and switches the transmission 5 in the speed increasing or decelerating direction so that the detected value matches the maximum output speed of the engine. That is, when the engine speed during the mowing work is higher than the maximum output speed, the transmission is switched to the speed increasing side, and when the engine speed is below the maximum output speed, the transmission is switched to the decelerating side. Switch. By performing such control, the engine mounted on the combine is always driven near the maximum output speed. Since the vehicle speed of this combine controls the supply amount of crop culms to the threshing device on which the combine is mounted, accurate vehicle speed control is required to maintain proper sorting accuracy and efficiency in the threshing device. Must be done.

[0003]

However, there is no conventional vehicle speed control device that controls the vehicle speed in consideration of the moving state of the grain in the threshing device. For this reason, in a combine equipped with a threshing device having a dust sending valve, when the dust sending valve is in a state of suppressing the movement of the grain culm in the handling chamber and in a state of promoting it, the supply of the grain culm to the threshing device is performed. The load condition of the engine changes due to the change in quantity. That is, when the dust delivery valve is oriented to promote the movement of the grain culm, the engine speed is maximized by decelerating the vehicle speed even when the amount of grain culm supplied to the threshing device suddenly increases. It is possible to return to the rotation speed, but if there is a sudden load increase in the threshing device when the dust delivery valve is in the direction to suppress the movement of the grain culm, the vehicle speed control cannot handle it and the engine May stop. As described above, when the engine is stopped while the grain thresher is being supplied to the threshing device, the grain stem is clogged in the threshing device, which causes a problem that it takes a long time to recover the mowing work.

An object of the present invention is to realize vehicle speed control in accordance with the load state of the threshing device by controlling the vehicle speed in consideration of the state of the dust-discharging valve in the threshing device, and the accuracy of grain selection in the threshing device. Another object of the present invention is to provide a combine vehicle speed control device capable of appropriately maintaining sorting efficiency and preventing occurrence of an accident such as clogging of a grain culm in a threshing device.

[0005]

A combine vehicle speed control device of the present invention is equipped with a threshing device having a dust sending valve for suppressing or promoting movement of grain culms in a handling chamber by changing an angle, and a load state for an engine is set. In a combine for increasing / decreasing the vehicle speed according to the above, a control mode for changing the relationship between the load state for the engine and the control amount of the vehicle speed according to the angle detected by the angle detection means for detecting the angle of the dust delivery valve And a changing unit.

[0006]

According to the present invention, the angle detecting means detects the angle of the dust feed valve provided in the threshing device, and the relationship between the load state on the engine and the control amount of the vehicle speed is changed according to the detected angle. Therefore, when the dust delivery valve is in a state of suppressing the movement of the grain culm in the threshing chamber, increasing the deceleration amount of the vehicle speed with respect to the load may cause the engine to stop due to overload or the grain culm to be clogged. Absent.

[0007]

FIG. 1 is a schematic diagram showing the configuration of a threshing device mounted on a combine to which a vehicle speed control device according to the present invention is applied. The threshing apparatus 1 includes a threshing unit 2 and a sorting unit 3. A handling drum 5 is rotatable in the handling chamber 4 of the grain removing unit 2, and the grains and straw chips are detached from the grain stem supplied to the handling chamber 4 by rotating the handling drum 5. The handling chamber 4 is provided with a plurality of dust valves 6 on the inner surface. The angle of the dust valve 6 is changed within a predetermined range by a moving mechanism described later.

[0008] The sorting section 3 provided below the grain removing section 2 is provided with an oscillating sorting plate 7 and a tong 8. The grains and straw chips separated from the culm in the handling room 4 fall downward, fall downward while undergoing swing sorting on the swing sorting plate 7, and receive air from the tortoise 8. As a result, only grains having a high specific gravity are harvested by the fine grain ogre 9, and straw chips having a low specific gravity are discharged from the discharge port 10 to the outside.

FIG. 2 is a schematic view showing an angle adjusting mechanism of a dust sending valve provided in the combine threshing device. Dust valve 6
Is rotatable by a fulcrum 11 at an upper end, and is engaged with an arm 13 at a fulcrum 12 at a lower end. A rack gear 14 is formed at one end of the arm 13, and the rack gear 14 meshes with a pinion gear 16 fixed to a dust valve motor 15. Thus, by rotating the dust valve motor 15 in the direction of arrow A or B,
The dust valve 6 swings around the fulcrum 11 in the direction of arrow C or D. When the dust delivery valve 6 is in the state shown by the solid line in the figure, movement of the grain culm in the handling chamber 4 is restricted, and when in the state shown by the two-dot chain line in the figure, movement of the grain culm is promoted. It

FIG. 3 is a diagram showing a configuration of a drive system including an engine in the combine. The rotation of the engine 21 is supplied to a transmission 22, which is changed in speed by a predetermined gear ratio and then output to an output shaft 23. The rotation of the output shaft 23 is supplied to the drive wheels of the combine (not shown). The rotation of the output shaft 23 is also transmitted to the threshing device 1 via a transmission mechanism (not shown) and is supplied as the rotational force of the handling cylinder 5. The rotation speed of the engine 21 is detected by a rotation speed sensor 25 constituted by an electromagnetic pickup facing the flywheel 24. The vehicle speed of the combine is detected by a vehicle speed sensor 26 constituted by a tacho generator attached to the output shaft 23 of the transmission 22.
The gear ratio of the transmission 22 is determined by the speed change lever 2 provided in the cockpit.
By operating 7, it is possible to switch between the deceleration direction and the acceleration direction. The speed change lever 27 is provided with a vehicle speed motor 28, and the speed ratio of the transmission 22 can be switched by the rotation of the vehicle speed motor 28.

FIG. 4 is a block diagram showing the configuration of the control unit of the combine. The CPU 31 has an A / D converter 34
The detection voltage and the set voltage of the vehicle speed sensor 26, the rotation speed sensor 25, the angle sensor 17, and the angle setting volume 38 are converted into digital data and input through the devices 37 through 37. The CPU 31 also includes a reaping clutch switch 3.
9, the grain stalk switch 40, the threshing clutch switch 41, the reverse gear switch 44, the vehicle speed control switch 45, and the sensitivity setting switch 46 are connected, and the state of each switch is input. The CPU 31 executes vehicle speed control according to a program written in the ROM 32 based on input data from these input devices. Data input during this time is temporarily stored in a predetermined memory area of the RAM 33. The CPU 31 outputs drive data to the vehicle speed motor driver 47 and the dust feed valve motor driver 48 via the D / A converters 42 and 43. Vehicle speed motor driver 4
7 drives the vehicle speed motor 28 based on this drive data, and the dust feeding valve motor driver 48 similarly drives the dust feeding valve motor 1
5 is driven.

The angle setting volume 38 is provided in the cockpit and is used for setting and inputting the angle of the dust valve 6. The CPU 31 drives the dust delivery valve motor 15 so as to realize the angle set by the angle setting volume 38. The reaping clutch switch 39 is provided in the control unit together with the threshing clutch switch 41, and detects that the reaping clutch and the threshing clutch are operated. The grain culm switch 40 is a switch for detecting the presence or absence of grain culm in the grain culm conveying path in the combine.

The reverse gear switch 44 is a switch for detecting that the combine is moving backward, and specifically detects whether or not the shift lever in the operation section is at the backward position. The vehicle speed control switch 45 and the sensitivity setting switch 46 are both provided in the control unit, and the vehicle speed control is executed by operating the vehicle speed control switch 45. The sensitivity setting switch 46 is a switch for selecting the relationship between the down rotation speed of the engine and the shift output in vehicle speed control from a plurality of types of sensitivity.

FIG. 5 is a flowchart showing a part of the processing procedure of the control unit of the combine. During the harvesting operation, the CPU 31 reads the engine speeds Ra and Rb before and after the grain culm is supplied to the threshing apparatus 1 from the speed sensor 25 (n1 to n3).

Next, the down rotation speed R of the engine is obtained from the rotation speeds Ra and Rb before and after the grain culms are supplied to the threshing device 1 (n4), and the dust-sending valve 6 is set to the suppression side or the acceleration side. It is determined whether or not (n5). When the dust-sending valve 6 is on the acceleration side, the deceleration output is read from the relationship shown in FIG. 7A (n6). On the other hand, the dust delivery valve 6
When is set to the suppression side, the deceleration output is read from the relationship shown in (B) (n7). The vehicle speed motor 28 is driven by the deceleration law output thus read (n8).
In the above processing, n5 to n7 correspond to the control mode changing means of the present invention. 7A and 7B.
The relationship between the down rotation speed and the deceleration output shown in
It is written in advance in the ROM 32 connected to.

In this way, by changing the relationship between the down rotation speed R and the deceleration output according to the state of the dust delivery valve 6,
The vehicle speed control according to the processing state of the grain culm in the threshing device 1, that is, the moving state of the grain culm can be performed. In the relationship shown in FIG. 7B, when the engine down rotation speed R is 100 or more, the deceleration output is continuously output. This means that traveling of the combine is stopped.

FIG. 6 is a flowchart showing a part of the processing procedure of the processing control unit of the combine according to another embodiment of the present invention. Instead of the processing of n5 to n7 shown in FIG. 5, the processing of n11 to n15 shown in FIG. 6 may be executed. After calculating the engine down speed R, the dust transfer valve 6
Is on the suppression side (n11), and if the dust delivery valve 6 is on the suppression side, the process proceeds to n13 and the sensitivity 1 shown in FIG.
The deceleration output is read from the relationship. On the other hand, if the dust delivery valve 6 is upright or on the promotion side, the sensitivity setting switch 4
Depending on the setting state of No. 6, the process proceeds to n13 to n15, and the deceleration output is read from the relationship of sensitivity 1 to sensitivity 3. Therefore, according to the processing of n11 to n15, when the dust sending valve 6 is on the suppression side, the setting of the sensitivity setting switch 46 is ignored and the deceleration output is read from the relationship of sensitivity 1.

[0018]

According to the present invention, the moving state of the grain culm in the threshing device is detected from the angle of the dust sending valve, and the relationship between the load applied to the engine and the control amount of the vehicle speed is changed according to the detection result. Therefore, there is an advantage that the vehicle speed can be controlled in consideration of the processing state of the threshing device, and the sorting accuracy and the sorting efficiency can always be properly maintained.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating a configuration of a combine to which a vehicle speed control device according to an embodiment of the present invention is applied;

FIG. 2 is a view showing an adjustment mechanism of a dust feed valve of the threshing apparatus.

FIG. 3 is a schematic diagram showing a configuration of a drive unit of the combine to which the vehicle speed control device is applied.

FIG. 4 is a block diagram of a control unit of the combine.

FIG. 5 is a flowchart showing a processing procedure of a control unit of the combine.

FIG. 6 is a flowchart showing a part of a processing procedure of combine control according to another embodiment of the present invention.

FIG. 7 is a diagram showing a relationship between an engine down speed and a deceleration output in the combine according to the embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between a down rotation speed and a shift output of an engine of a combine according to another embodiment of the present invention.

[Explanation of Codes] 1-Threshing device 4-Handling chamber 6-Dust transfer valve 21-Engine 22-Transmission

Claims (1)

(57) [Claims] 1. A combine for mounting a threshing device having a dust sending valve for suppressing or promoting movement of grain culms in a handling chamber by changing an angle, and controlling increase and decrease in vehicle speed according to a load state on an engine. And a control mode changing means for changing the relationship between the load condition on the engine and the control amount of the vehicle speed according to the detected angle of the angle detecting means. Vehicle speed control device.