JPS6317622A - 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 shogi machine.

[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]

A feature of the present invention is that an automatic speed change operation structure for a snow reaping harvester is provided with a check means for temporarily suspending the automatic acceleration operation during a direction change operation and for a set time after the change operation is completed. The functions and effects are as follows.

[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, and even after the end of the change operation, the machine continues to travel at a constant speed for the set time, so even if an unstable state occurs in the reaping conveyance section immediately after the end of the change operation. , it will disappear naturally within this set time.

〔Effect of the invention〕

As described above, even during automatic acceleration, the direction of travel 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 reaping/harvesting machine. Na(,
The reaping efficiency inside the reaping and harvesting machine has been 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
), (1) is equipped with a threshing device (2) in the center of the vehicle body (3), and a pulling device (4) and a reaping device (
5) An agricultural combine harvester is constructed by attaching a reaping pre-processing section (7) composed of a reaped husk culm conveying device (6) and the like so as to be movable up and down.

Next, to explain in detail the power transmission system of the combine harvester, as shown in Fig. 4, the engine (
The power from 8) is branched into a transmission system for the threshing device (2) and a transmission system for driving the traveling and reaping pre-processing parts. The latter branched power is transmitted to the input shaft (l) of the traveling transmission case (9).
After being transmitted to O) by a belt via a tension clutch (11), it is further branched into a traveling system and a reaping pre-processing connection 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 pre-treatment link 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 valve (21) is (F,), (F2),
By switching to the positions (F:l) and (R), the hydraulic clutch for 1st forward speed (20a), the hydraulic clutch for 2nd forward speed (20b), the hydraulic clutch for 3 forward speeds (2
0c) and the reverse hydraulic clutch (20d) to obtain a gear shift state of the transmission system with the clutch engaged, and set the control valve (21) to the (No) position. Fully hydraulic clutch (20a) by switching.

By removing the pressure oil from (20b)..., the transmission is cut off and a neutral stopped state is obtained. Further, an accumulator (22) is connected to the negative side of the control valve (21),
The shock of starting is suppressed by suppressing a sudden increase in clutch operating pressure when the gear is changed from the neutral position (No).

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) in 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 A) 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, Stenb (sz), (si)
, the loop setting time (1) of (S4) is counted, and the process returns from step (S,) to step (S+) and moves forward 2
Shift operation is performed to speed (F2). Then, the third forward speed (F3) is operated in the same manner.

In cases involving reaping work, if either the left or right copying sensor (26R) or (26L) comes into contact with the planted culm (A) during this speed change operation and enters the detection state, step (S6) is performed. The current shift position is held in the loop from step (S2), and this constant speed state continues until the scanning sensors (26R) and (26L) become non-detecting states. This is, for example, at the time (a) after the gear change operation to the first forward speed (Fl), the copying sensor (26R),
(26L) is in the detection state, the time when the copying sensor (26R) and (26L) are in the non-detection state (
The forward l speed (Fl) is maintained until b). At this time, since the count variable (N) is reset to zero in step (S2), the set time (1) is counted again from the time point (b), and then the shift operation is performed to the next shift position. It's been a long time since I've been in the middle of a long time since I've been in the middle of a long time.

[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 drawings]

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 device, 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. (1)...Setting time.

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 suspending the automatic acceleration operation during a direction change operation and for a set time (t) after the end of the direction change operation.