JPS5835646B2 - combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a combine harvester that harvests planted husk culms in a reaping section and then handles and threshes the cut husks in a threshing device.

In the above combine harvester, the amount of reaping per unit time in the reaping section is determined by the density of the growth state of the planted culm and the traveling speed.

In addition, the load acting on the handling barrel of the threshing device changes depending on the amount of husks fed into the threshing device per unit time, and the best threshing performance is achieved when this threshing load is within an appropriate certain range. It is something that can be demonstrated.

Therefore, in order to keep the threshing load approximately constant, a structure is generally adopted that automatically adjusts the traveling speed as the handling barrel load, which accounts for most of the threshing load, changes. In this case, the change in handling barrel load due to the culm harvested at a certain point in time is quite delayed from the time of harvest.
When rotating the combine harvester at the end of a row of planted culms with automatic gear shifting to face a new row of planted culms, the load on the handling barrel is still the same as that of the remaining culms. Since the culm is still acting strongly, not only does the running speed become slow and the work efficiency decreases, but also the culm is not acting on the handling drum when reaping starts toward a new row of planted culms. Therefore, the traveling speed is fast and the amount of reaping per unit time is excessive, and when this reaches the handling cylinder, the load suddenly increases, the traveling speed decreases, and the amount of reaping per unit time becomes too small.

This situation is repeated, and it takes time to maintain the handling barrel load within a certain range, and during this time there is a problem that threshing errors such as handling loss occur.

Therefore, as a means to eliminate such inconvenience, conventionally, Japanese Patent Publication No. 49-43769 and Japanese Patent Application Laid-Open No. 50-1
As shown in Publication No. 57121, a structure has also been proposed in which the gear shift lever can be manually operated even during automatic travel control, so that the aircraft can be manually rotated at the end of the culm row. However, even in this case, the automatic running speed control based on the threshing load is controlled based only on the threshing load side, so it is not effective in maximizing engine output and increasing threshing efficiency. For example, when reaping near the edge of a field with a smaller number of reaping rows than normally used, or when you want to consciously reduce the traveling speed relative to the threshing load due to the lodging of the culm, etc. The disadvantage of these vehicles was that they were unable to perform automatic driving control and had to rely on manual control.

In automatically controlling the traveling speed according to fluctuations in the threshing load, the present invention enables arbitrary manual traveling control during automatic control, but the automatic control of the traveling speed is not performed on the threshing load side. without relying solely on signals from
The purpose is to transmit control signals from the speed change operation system, which can be operated manually, so that the control conditions for traveling speed and threshing load can be changed as appropriate depending on the reaping situation, etc. .

The features of the combine harvester according to the present invention include a second detection device that detects the load acting on the on-board threshing device, and a configuration that sets the traveling speed according to the operating position based on the detection result of the second detection device. a first detection device that detects the operation position of the speed change operation lever; and a first detection device that detects the operation position of the speed change operation lever, and detection by the first detection device. Comparing the results with the detection results by the second detection device,
In order to control the traveling speed so that the threshing load detected by the second detection device has a value corresponding to a load within a certain range for a predetermined traveling speed, the automatic operation drive section an automatic transmission mechanism that emits a control signal for commanding the operating position of the transmission control lever;
Furthermore, the speed change operation lever and the automatic operation drive section are interlocked and connected via a lightly interlocking friction clutch that allows manual operation of the operation lever, and this configuration provides the following effects. .

In other words, by interlocking the automatic operation drive unit and the speed change operation lever via a friction clutch, manual travel control can be performed at will even during automatic control, and smooth manual operation at the end of the culm row can be achieved. Of course, the present invention makes effective use of the manual control gear shift operating lever, and uses the detection result of the gear shift operating lever position and the threshing load detection result. Since it is configured to compare and control the traveling speed based on the comparison result, for example, when reaping at the edge of a field, the reaping and threshing operation is performed with a smaller number of reaping rows than the normal number of reaping rows. In case of work conditions such as when the shell culm is significantly collapsed and the appropriate machine running speed is relatively low considering the threshing load, the gear shift lever should be adjusted to a level commensurate with the threshing load. By simply performing manual operation in advance to the low speed side, the detection result of the low speed running state is compared with the relatively small threshing load, and the running speed is controlled so that the running speed and the threshing load are at a substantially constant ratio. Therefore, there is an advantage that appropriate automatic control of the reaping and threshing work can be performed in response to changes in work conditions as described above.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows the entire combine harvester.

A reaping section 4 having a pulling device 2 for simultaneously raising three rows and a cutting blade 3 is provided in front of the traveling vehicle body 1, a threshing device 5 is mounted on the traveling vehicle body 1, and the reaping section 4 and the threshing device 5 are installed on the traveling vehicle body 1. A rear conveyance device 6 is provided in between, which adjusts the cut culm to a predetermined handling depth and changes it to a horizontal posture. The grains are fed into a threshing device 5, held and conveyed by a feed chain 7 provided in the threshing device 5, and then handled and threshed by a handling drum 8.

FIG. 2 shows a control circuit of an automatic transmission mechanism 9 that automatically changes the traveling speed V of the traveling vehicle body 1 according to the load A acting on the handling cylinder 8 of the threshing device 5.

A gear shift lever provided near the driver's seat 11 provided in the traveling vehicle body 1 includes a hydraulic forward/reverse continuously variable transmission device which is a combination of a variable displacement pump and a motor housed in a traveling transmission case 10 provided in the traveling vehicle body 1. It is constructed so that it can be changed and adjusted by the rocking displacement of the gear 12, and accordingly, it is constructed so that switching between forward and backward travel and setting and adjustment of the traveling speed can be performed by changing the gear shift operation and the operating position of the gear 12.

A first detection device 13 that electrically detects the operation position of the speed change operation lever 12 and an input section of the handling cylinder 8,
A second detection device 14 is provided which detects the torque of the handling cylinder 8 with respect to input power and electrically detects the handling cylinder load A as a threshing load.

Then, the detection results of the rain detection devices 13 and 14 are inputted to the comparator 15 so that no signal is emitted when the ratio is constant, and a signal indicating that the handling torso load A is a dog is detected from the traveling speed V at this constant ratio. When the forward/reverse switch 16 is inputted, the forward/reverse switch 16 is set in the forward rotation direction, the electric power generated by the switch 16 causes the motor 17 to rotate forward, and the speed change operation lever 12 is automatically operated to the high speed side and vice versa. , when a signal indicating that the handling barrel load A is small is inputted to the comparator 15 from the shift operation lever position at this constant ratio, the switching device 16 is set in the reverse direction to reverse the motor 17, and thereby,
The control lever 12 is configured to automatically operate to the low speed side.

With this configuration, the handling cylinder load A is maintained within a range of a substantially constant ratio with respect to a predetermined traveling speed.

As shown in FIG. 3, a pivot shaft 19 of the shift operating lever 12 is rotatably provided coaxially with the rotation shaft 18 of the motor 17, and the pivot shaft 19 of the shift operating lever 12 is connected to the pivot shaft 19. It is slidably provided.

And, the motor 17 side of this speed change operation lever 12,
A first surface that faces the end of the rotating shaft 18 relatively along a virtual plane S perpendicular to the rotating shaft 18. Second friction plate 20.21
, and a spring 22 connects the first. Second friction plate 20.
The friction clutch 23 is configured to relatively press 21,
Accordingly, the gear shift operating lever 12 is configured to swing as the motor 17 rotates.

Then, by adjusting the elastic force of the spring 22, the friction force of the friction clutch 23 is adjusted so that the shift operation lever 12 can be manually operated regardless of the motor 17 even when the gear shift operation lever 12 is in an interlocked state with the friction clutch 23. This is the setting.

With this configuration, as shown in Fig. 4A, when the reaping section 4 reaches the end of the row of planted culms, the speed change operation lever 12 is manually moved to the high speed side, and it turns at high speed. However, when the reaping section 4 begins to enter the newly planted row of culms as shown in the opening of FIG.
As shown in Figure 4 (c), the culm cut off at the beginning of the plunge is in the handling trunk 8.
When the shift lever 12 is near the end (when there is no longer any operational resistance to the operator holding the shift lever 12), when the shift lever 12 is released, the automatic shift state is entered.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester according to the present invention, in which Fig. 1 is a side view showing the whole, Fig. 2 is a circuit diagram, Fig. 3 is a front view showing the speed change operation lever drive structure, and Fig. 4 , C are simplified plan views showing the state of use. 5... Threshing device, 12... Speed change operation lever, 13... First detection device, 14...
・Second detection device, 9... Automatic transmission mechanism, 17.
...Automatic operation drive unit, 23...Friction clutch.

Claims (1)

[Claims] 1. A second detection device 14 that detects the load A acting on the on-board threshing device 5, and a speed change operation lever configured to set the traveling speed (■) depending on the operation position based on the detection result of the second detection device 14. In a combine harvester equipped with an automatic operation drive unit 17 that automatically changes the setting of the operation position of the gear shift operation lever 12, a first detection device 13 that detects the operation position of the shift operation lever 12, and detection by the first detection device 13. Comparing the results with the detection results by the second detection device 14,
In addition, in order to control the running speed ■ so that the threshing load A detected by the second detection device 14 becomes a value corresponding to a load within a certain range for the predetermined running speed ■, the automatic An automatic gear shift state switch is provided for issuing a control signal for instructing the operation drive unit 17 to operate the gear shift operating lever 12;
and the automatic operation drive section 17 means the operation lever 12.
A combine harvester characterized in that the combine harvester is interlocked and connected via a friction clutch 23 in a light interlocking state that allows manual operation of the combine harvester.