JPS6314627A - Automatic variable speed operation structure of reaping harvester - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 transmission mechanism described above to simplify operation and reduce the burden on the operator. Models that aim to do this are emerging.

[Problem that the invention seeks to solve]

During the reaping operation, 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 culms at appropriate positions. If this operation is performed while driving at a constant speed, there is no particular problem, but when the machine is stopped, for example at the start of reaping work, it is accelerated by the automatic transmission mechanism mentioned above and moves to a group of planted culms. When you rush in to harvest, even if you try to change gears in the direction of travel, you will be accelerating, making it difficult to accurately track and grasp the planting position of the culms, making it difficult to change the speed in the direction of travel. There were cases where the change operation could not be performed successfully.

- 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 automatic speed change operation structure of the reaper and harvester is provided with a check stage I that temporarily interrupts the automatic acceleration operation during the operation of changing the direction of travel.The functions and effects thereof are as follows. That's right.

[For production]

If the above-mentioned restraining means is provided, automatic acceleration operation will be interrupted during the operation to change the direction of travel, and the vehicle will run at a constant speed.
The operation to change the direction of travel is performed reliably.

〔Effect of the invention〕

□ As mentioned above, even during automatic acceleration, the direction of movement is reliably changed and the planted culms are harvested at the appropriate position, and there is no negative impact on the post-processing inside the harvester. Reaping efficiency with a reaping yield of N1m was 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 Figure 6, a pair of left and right crawler traveling devices (1
), a threshing device (2) is mounted in the center of the car body (3) equipped with An agricultural combine is constructed by attaching a reaping pretreatment section (7) that can be raised and lowered.

Next, the power transmission system of the combine harvester will be explained in detail.
As shown in Fig. 4, the power from the engine (8) mounted on the vehicle body (3) is branched into a transmission system for the thresher W (2) and a transmission system for traveling and driving the cutting surface processing section. Ru. The latter branched power is transmitted to the input shaft (
10) via the tension clutch (II)
communicated. Later, it is further branched into a traveling system and a reaping processing 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 a tension clutch-type reaping latch (14).
) to the input shaft (15) of the reaping pre-processing section (7). A part of the power of the input shaft (10) is transmitted to a three-stage sub-transmission device (16), a main transmission device (17) with three forward speeds and one reverse speed, and a steering clutch (18R).
(18L) to the left and right axles (19).

(19).

The main transmission (17) includes a multi-plate hydraulic clutch (20a) in the transmission system of a pair of regular gears forming each gear stage.

(20b), (20c), and (20d) are incorporated, respectively, and these hydraulic clutches (20a) and (20b) are assembled.
It is configured as a hydraulically operated traveling transmission that selectively supplies pressure oil to the gears to perform transmission at a desired gear position.

When operating the gear transmission (12) of the reaping processing unit transmission system and the auxiliary transmission (16) of the traveling system, the tension clutch (11) is operated, but the main transmission (17) is operated.
) is operated only by operating a control valve (21) incorporated in the clutch operating hydraulic circuit shown in FIG.

In other words, the control valves are (F+), (Fi), (Fi)
By switching to the position (R), the hydraulic clutch for forward I speed (20a), the forward dual gear hydraulic clutch (20b), the forward three speed hydraulic clutch (20c), and the reverse hydraulic clutch (20d) can be selected. By supplying pressure oil all at once, the gear shift state of the transmission system with the clutch engaged can be obtained.
Moreover, by switching the control valve (21) to the (No) position, the fully hydraulic clutches (20a), (20b),
・By removing the pressure oil and cutting off the power transmission, a neutral stopping state can be achieved. Further, an accumulator (22) is connected to the negative side of the control valve (21), and the neutral position i&(
This system suppresses the sudden increase in clutch operating pressure when the gear is changed from No. 1 to 2, thereby alleviating the shock of starting the vehicle.

Next, the flow of operation 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 reaping work, place the reaping device (5) at the appropriate position to remove the planted culms (
An operation to change and correct the traveling direction, that is, steering control, is performed so that ^) is reaped. To explain this steering control in detail, as shown in Fig. 3, a limit switch-type copying sensor (26
R).

(26L) and the steering clutch (18L) is installed.
R), (18L) is operated by a hydraulic cylinder (2).
7R).

(27L) is equipped 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 culm (A) and enters the detection state, and the signal is input to the control device (23), the aircraft moves toward the planted culm (A). It is determined that the image is closer to the right side. As a result, the control device (23) issues an operation signal to the solenoid valve (28), and the solenoid valve (28) is placed at a position where hydraulic oil is supplied to the left hydraulic cylinder (27L).
28) is operated to disengage the left steering clutch (18L) and correct the direction of the aircraft to the left. The operation signal to the solenoid valve (28) is sent to the right copying sensor (26R).
) is emitted until it becomes undetected. As mentioned above,
Steering control is performed so that both the left and right scanning sensors (26R) 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 (1) up to the third forward speed (F). This operation is performed in step (Sl) as shown in Fig. 2.
After the gear shift operation is performed, steps (S2) and (S3)
, (S4), the set time (1) is counted, the process returns from step (S,) to step (Sl), and the speed is changed to the second forward speed (F2). And similarly forward 3
(F3).

In cases involving reaping work, if either the left or right copying sensor (26R) or (26L) comes into contact with the planted culm (8) during this speed change operation and enters the detection state, step (S6) is performed. The counting of the set time (1) is interrupted at , and the shift position at which the copying sensors (26R) and (26L) were in the detection state is maintained, and this constant speed state is maintained when the copying sensors (26R) and (26L) are in the detection state. ) continues until it becomes undetected. This is, for example, forward l speed (
At time (a) after shifting to Fl), the copying sensor (
261+) and (26L) are in the detection state, the scanning sensor (26L) is detected as shown by the dashed line in FIG.
The first forward speed (Fl) is maintained until time point (b) when R) and (26L) become non-detected. Then, the time point (
After counting the remainder of the set time (1) from b), the gear shift operation is performed to the next shift position.

[Another example]

In the embodiment described above, a stepped transmission (17) using a plurality of hydraulic clutches was used, but this 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 flow chart showing the flow of operation. , FIG. 3 is a steering control system diagram, FIG. 4 is a diagram showing a transmission and power transmission path, FIG. 5 is a hydraulic circuit diagram, and FIG. 6 is an overall side view of the combine harvester. (17)...Transmission, (23)...
control means.

Claims (1)

[Claims] An automatic gear shift operation structure for a reaping harvester, comprising a control means (23) for automatically accelerating a traveling gear shift device (17) from a neutral stop state to an artificially selected specified gear shift state, An automatic speed change operation structure for a reaping harvester, comprising a check means for temporarily interrupting the automatic acceleration operation during a direction change operation.