JPH0514526B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reaping machine equipped with a control means for automatically accelerating a traveling transmission from a neutral stop state to an artificially selected specified speed change state. This article relates to an automatic speed change operation structure for a harvester.

[Conventional technology]

In recent years, reaping and harvesting machines, which require the operation of the reaping section and other working devices in addition to the speed change operation while traveling, have adopted the automatic speed change mechanism described above to simplify the operation and reduce the burden on the operator. Models that aim to reduce this are emerging.

[Problem that the invention seeks to solve]

During reaping work, the direction of movement of the reaping/harvesting machine is automatically or manually changed and corrected as needed so that the reaping unit, such as a cutter, captures and reaps the planted grain culm at an appropriate position. If this operation is performed while traveling at a constant speed, it can be performed without any particular problem, but for example, when starting a harvesting operation, from a stopped state, the automatic transmission mechanism described above accelerates the movement of the planted grain culms. When you rush in to harvest, even if you try to change gears in the direction of travel, you will be accelerating.
It became difficult to accurately track and determine the planting position of grain culms, and there were cases where it was difficult to change the direction of movement.

The present invention focuses on this point and aims to enable accurate direction change operations during automatic acceleration.

[Means for solving problems]

The feature of the present invention is that the above-mentioned automatic speed change operation structure for the reaping harvester is provided with a check means for temporarily interrupting the automatic acceleration operation during the operation to change the direction of travel.The functions and effects thereof are as follows. That's right.

[Effect]

When the above-mentioned restraining means is provided, the automatic acceleration operation is interrupted and the vehicle runs at a constant speed during the operation to change the direction of travel, so that the operation to change the direction of travel can be performed reliably.

〔Effect of the invention〕

As described above, even during automatic acceleration, the direction of movement is reliably changed and the planted grain culm is reaped at the appropriate position, and there is no negative impact on post-processing within the reaping/harvesting machine. The reaping efficiency of the harvester has improved.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, an agricultural combine harvester which is one of the embodiments of the present invention will be described based on the drawings.

As shown in FIG.
An agricultural combine harvester is constructed by mounting a reaping pre-processing section 7, which includes a moving device 4, a reaping device 5, a reaped grain culm conveying device 6, etc., on the front part so as to be able to move up and down.

Next, to explain the power transmission system of the combine in detail, as shown in FIG. It is branched into a transmission system. The latter branched power is transmitted to the input shaft 10 of the traveling transmission case 9 via a belt via a tension clutch 11, and then further branched to the traveling system and the reaping pretreatment section transmission system.

A part of the power from the input shaft 10 is taken out to the PTO shaft 13 via a two-speed high/low gear transmission 12, and from there is transferred to the pre-reaping treatment section 7 via a tension clutch type reaping clutch 14. input shaft 15
is transmitted by the belt. A part of the power of the input shaft 10 is transmitted to a three-stage auxiliary transmission 16, a main transmission 17 with three forward speeds and one reverse speed, and a steering clutch 18.
The signal is transmitted to the left and right axles 19, 19 via R and 18L.

The transmission device 17 includes multi-plate hydraulic clutches 20a and 20 in a transmission system of a pair of regular gears forming each gear stage.
The hydraulic clutches 20a, 20b, 20b, 20b, 20b, 20c, 20d, .

a gear transmission device 12 of the reaping pretreatment section transmission system;
When operating the auxiliary transmission 16 of the traveling system, the tension clutch 11 is operated, but the main transmission 17 is operated only by the control valve 21 incorporated in the hydraulic circuit for clutch operation shown in FIG. It is done by.

That is, by switching the control valves F ₁ , F ₂ , F ₃ and R to the positions, the hydraulic clutch 20a for forward 1st speed, the hydraulic clutch 20b for 2nd forward speed, the hydraulic clutch 20c for 3rd forward speed, and the hydraulic clutch 20c for reverse Hydraulic pressure is alternatively supplied to the hydraulic clutch 20d to obtain a gear shift state of the transmission system in a clutch engaged state, and
By switching the control valve 21 to the _N0 position, all hydraulic clutches 20a, 20b...pressure oil is removed, transmission is cut off, and a neutral stop state is obtained. Further, an accumulator 22 is connected to the primary side of the control valve 21, and suppresses a sudden increase in the clutch operating pressure when the gear is changed from the neutral position _N0 , thereby alleviating the shock of starting. There is.

Next, the operation flow of the electric circuit type control device 23, which is one of the control means 23 for automatically operating the control valve 21 via the servo motor 24, will be described in detail. During the reaping work, as shown in FIG. 3, the operation to change and correct the advancing direction so that the planted grain culm A is reaped at the appropriate position of the reaping device 5, that is, the steering control, is as shown in FIG. A limit switch type copying sensor 26R protrudes left and right.
26L and the steering clutch 18
Hydraulic cylinder 27R, which cuts and operates R, 18L,
27L is provided with a solenoid valve 28 that supplies hydraulic oil from a pump (not shown). For example, when the right side copying sensor 26R comes into contact with the planted grain culm A and enters the detection state, and the signal is input to the control device 23, it is determined that the aircraft is moving to the right side with respect to the planted grain culm A. Ru. As a result, an operation signal is issued from the control device 23 to the solenoid valve 28, and the solenoid valve 28 is operated to a position where hydraulic oil is supplied to the left hydraulic cylinder 27L, and the left steering clutch 18L is disengaged. The aircraft corrects its orientation to the left. The operation signal to the electromagnetic valve 28 is issued until the right copying sensor 26R is in a non-detecting state. As mentioned above, the left and right copying sensors 26
Steering control is performed so that both R and 26L are in a non-detecting state.

FIG. 1 is a diagram showing the relationship between time and the shift position of the main transmission 17, and FIG. 2 is a flowchart showing the flow of operations. During normal driving, as shown by the solid line in FIG. 1, the automatic gear shifting operation is performed step by step with a set time t until the third forward speed _F3 is reached. This operation is performed in steps as shown in Figure 2.
After shifting to forward 1st speed F ₁ with S ₁ , step
The set time t is counted in the loop of S ₂ , S ₃ , and S ₄ , and the process returns from step S ₅ to step S ₁ to shift to 2nd forward speed.
Shift operation is performed to _F2 . And similarly, forward 3 speed
Operated by F ₃ .

In cases involving reaping work, if one of the left and right copying sensors 26R, 26L comes into contact with the planted grain culm A during this speed change operation and enters the detection state, the set time t is counted in step _S6. At the same time, the shift position at which the copying sensors 26R, 26L entered the detection state is maintained, and this constant speed state continues until the copying sensors 26R, 26L enter the non-detection state. This is, for example, 1st forward speed
Copying sensor 2 at time a after shifting to _F1
If 6R and 26L are in the detection state, the first
As shown by the dashed line in the figure, the copying sensor 26R,
1st forward speed until point b when 26L becomes non-detected.
F ₁ is retained. Then, after the remaining set time t has been counted from the time point b, the gear shift operation is performed to the next shift position.

[Another example]

In the above-described embodiment, a stepped transmission 17 using a plurality of hydraulic clutches is used, but it may be constructed as a hydrostatic continuously variable transmission.

[Brief explanation of the drawing]

The drawings show an embodiment of the automatic speed change operation structure for a reaping harvester according to the present invention, FIG. 1 is a diagram showing the relationship between time and the speed change position of the main transmission, and FIG. 2 is a flowchart showing the flow of operation. , FIG. 3 is a steering control system diagram, FIG. 4 is a diagram showing the transmission path of the transmission and power, FIG. 5 is a hydraulic circuit diagram, and FIG. 6 is an overall side view of the combine harvester. 17...Transmission device, 23...Control means.

Claims (1)

[Claims] 1. An automatic speed change operation structure for a reaping harvester, which is equipped with a control means 23 that automatically accelerates a traveling speed change device 17 from a neutral stop state to an artificially selected specified speed change state, and which is capable of changing the direction of travel. An automatic speed change operation structure for a reaping harvester, comprising a check means for temporarily interrupting the automatic acceleration operation during operation.