JPS6314629A - 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 combine harvester 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 invention relates to an automatic gear shift operation structure.

[Conventional technology]

In recent years, combine harvesters, which require the operation of the reaping section, threshing device, etc. in addition to the speed change operation while traveling, have been adopting automatic transmission mechanisms such as those mentioned above to simplify operation and reduce the burden on the operator. new models are emerging.

[Problem that the invention seeks to solve]

During reaping and harvesting work, a handling depth change operation is automatically or manually carried out to correct and change the conveyance position of the husk culm as needed so that the tip of the cut husk culm is fed into the proper position of the threshing device. There is. If this operation is performed while driving at a constant speed, there is no particular problem, but for example, when starting reaping work, the automatic transmission mechanism described above accelerates from a stopped state and rushes into a group of planted culms. When reaping, it is difficult to change the handling depth accurately because the speed change operation is done while accelerating, which results in the ears not being threshed in the correct position. , which could lead to a decrease in threshing efficiency.

An object of the present invention is to focus on this point and to enable accurate handling depth changing operations during automatic acceleration.

[Means for solving problems]

The feature of the present invention is that the automatic speed change operation structure for a stirred combine harvester is provided with a check means for temporarily interrupting the automatic acceleration operation during the handling depth speed change operation, and its functions and effects are as follows. .

[For production]

When the above-mentioned check means is provided, the automatic acceleration operation is interrupted and the vehicle runs at a constant speed during the handling depth changing operation, so that the handling depth changing operation is reliably performed.

〔Effect of the invention〕

As described above, even during automatic acceleration, the handling depth change operation is performed reliably, the husk is threshed at the appropriate position, and a decrease in threshing efficiency can be prevented.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A combine harvester which is an embodiment of the present invention will be described below based on the drawings.

As shown in Figure 5, a pair of left and right crawler traveling devices (1
), (1) is equipped with a threshing device (4), and the reaping pre-processing section, which is composed of a hoisting device (5), a reaping device (2), a conveying device (3), etc., can be raised and lowered freely. It is attached to an agricultural combine harvester.

Next, to explain the power transmission system of the combine in detail, as shown in Fig. 3, the engine (8,
The power from the threshing device (4) is branched into a transmission system for the threshing device (4) and a transmission system for traveling and driving the pre-harvesting ring. The latter branched power is connected to the input shaft (10) of the traveling transmission case (9).
After being transmitted to the belt via a tension clutch (11), it is further branched into a traveling system and a reaping pre-processing section pusher 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 pre-reaping processing section. Further, a part of the power of the input shaft (10) is
A 3-speed auxiliary transmission (16), a main transmission (17) with 3 forward speeds and 1 reverse speed, and a steering clutch (18), (1B
) 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.

The above-mentioned reaping pretreatment push part transmission system gear transmission! (12), and when operating the auxiliary transmission (16) of the driving system, the tension clutch (11) is operated, but the main transmission (17) is operated.
) is performed only by operating a control valve (21) incorporated in the clutch operating hydraulic circuit shown in FIG.

In other words, the control valves are (Fl), (pt), (Fl)
By switching to the positions (R) and 1, the hydraulic clutch for forward 1st speed (20a), the hydraulic clutch for 2nd forward speed (20b), the hydraulic clutch for 3rd forward speed (20c), and the hydraulic clutch for reverse (20d) are activated. By supplying pressurized oil alternatively, the gear shifting state of the transmission system with the clutch engaged can be obtained.
And, 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 accumulator (22) is in a neutral position (N
The shock of starting is suppressed by suppressing a sudden increase in the clutch operating pressure when the gear is changed from the gear position (o).

'Next, the control valve (21) is connected to the servo motor (2
The operation flow of the electric circuit type control device (23), which is one of the control means (23) that is automatically operated via 4), will be described in detail. First, handling depth control is performed as follows.

As shown in Fig. 5, the conveying device (3) consists of a clamping conveying device (6) that clamps and conveys the stock side of the cut culm, and a locking conveying device (7) that locks and guides the tip side of the cut culm. and a reconveying device (6).

(7) It is integrally supported so as to be driven to swing around the transverse axis (pt) of the fuselage. In this way, the reaping device (
The culm harvested in step 2) is transferred to the conveying device (3) on the starting end side, and the swinging operation is used to change whether the culm is picked up on the stock side or on the tip side. The handling depth is changed by passing a fixed position from the feed chain (25) to the downstream feed chain (25).

A pair of rimming switch-type grain culm sensors (26a) and (26b) are installed above the locking conveyor W (7).
is arranged, and this culm sensor (26a).

A signal from (26b) is input to the control device (23). The control device (23) includes a double-shell culm sensor (26a
).

(26b) so that the tip of the reaped culm' is located between them, that is, the culm sensor (26a) on the locking and conveying device (7) side is in the detection state, and the other culm sensor (26b) is in the non-detection state. The conveying device (3) is oscillated so that the following occurs.

FIG. 1 is a diagram showing the relationship between time and the shift position of the main transmission (17), and FIG. i is a feed chain showing the flow of operation. During normal driving, that is, when mowing work or the above-mentioned handling depth change operation is not involved, it takes a set time (
Automatic gear shifting is performed step by step while placing D. As shown in Fig. 2, this operation is performed by shifting to first forward speed (Fl) at step (St), and then from step (St) to (
S3).

In the loop of (S4), the set time (1) is counted, and the process returns from step (Ss) to step (St), forward 2nd speed (
F2). Similarly, forward 3rd gear (F
3) is operated.

If mowing work is involved, control or call 111 during this gear change operation.
When a signal is issued from the device (23) to swing and drive the conveying device (3) to change the handling depth, the counting of the set time (1) is interrupted in step (S6), and the changing operation is performed. The current shift position is held until the oscillation state of the operation signal ends. However, if the change operation signal is oscillated at forward l speed (Fl), the process moves from step (S,) to step (S,), and the counting operation for the set time (1) is interrupted. Kotona←Continues. This is because it is presumed that when the speed is relatively low even during acceleration, such as in the first forward speed, there is no effect on the handling depth changing operation.

If the above-mentioned oscillation of the operation signal for changing the handling depth is, for example, at time point (a) after the gear shift operation to the second forward speed (F2), then as shown by the dashed line in FIG. The second forward speed (F2) is maintained until the time point (b) when the oscillation of the actuation signal ends. and i from the time point (b) to the set time (1)
After counting the number of times, the gear is shifted to the next shift position.

[Another example]

In the above-mentioned embodiment, the speed is higher than a certain constant speed, that is, the forward l speed (
When changing the speed and loading the machine over Fl), automatic acceleration is temporarily suspended if the handling depth is changed, but in general, if the handling depth is changed, the threshing load will increase. Therefore, as shown in the flowchart of FIG. 6, the configuration may be such that when an operation signal for deep handling is issued during automatic acceleration, acceleration is temporarily interrupted.

Further, although the main transmission (17) is of a multi-stage type using a plurality of hydraulic clutches, it may be configured as a hydrostatic continuously variable transmission type.

[Brief explanation of drawings]

The drawings show an embodiment of the automatic speed change operation structure for a combine 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. The diagram shows the mission and power transmission path,
FIG. 4 is a hydraulic circuit diagram, FIG. 5 is an overall side view of the combine harvester, and FIG. 6 is a flowchart showing the flow of operation in another embodiment. (17)...Transmission, (23)...
control means.

Claims (1)

[Claims] This is an automatic shift operation structure for a combine harvester, which is equipped with a control means (23) for automatically accelerating a traveling transmission (17) from a neutral stop state to an artificially selected specified shift state, and has a handling depth. An automatic speed change operation structure for a combine harvester, comprising a check means for temporarily interrupting the automatic acceleration operation during a change operation.