JPS6314625A - Combine - 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 that threshes grain while harvesting planted culms.

[Conventional technology]

In the combine harvester, so-called handling depth control is performed so that the harvested husk is threshed at the appropriate position in the threshing device. This is because when a conveyance device on the way from the reaping device to the feed chain picks up the culm from the reaping device, so that the feed chain grips and conveys the culm at a certain position from the tip of the culm, The structure is such that the position of the conveying device is changed so as to pick up or take off the tip side or the stock side of the grain culm depending on the detected grain culm length.

[Problem that the invention seeks to solve]

If the grain culm length changes frequently during the reaping operation, the handling depth control is operated accordingly, and the position of the conveying device is frequently changed. As a result, the culm may not be transferred properly at the point where the reaping device passes the husk to the conveyance device, or the conveyance may be disrupted at other points, resulting in damage to the conveyance system. There is a high possibility that problems will occur.

The present invention focuses on this problem and aims to suppress the occurrence of problems in the conveyance system based on the increase in handling depth control operations due to frequent changes in grain culm length.

[Means for solving problems]

The feature of the present invention is that the stirred combine harvester is equipped with means for detecting the frequency of handling depth control, and control means for automatically decelerating the running speed when the handling depth control frequency exceeds a set value. Its action and effects are as follows.

[For production]

If it is determined that changes in grain culm length occur frequently and problems such as transport disturbances are likely to occur in the conveyance system, the control means automatically decelerates the grain, thereby reducing the frequency of detection of changes in grain culm length. As a result, the operating frequency of the handling depth control is also reduced, thereby avoiding the occurrence of problems in the conveyance system as described above.

〔Effect of the invention〕

As described above, by increasing the number of times the handling depth control is activated, it is possible to avoid malfunctions in the conveyance system as much as possible, and also to suppress defective threshing in the threshing device, which can be caused by disturbances in conveyance. As a result, the harvesting efficiency of combine harvesters has improved.

〔Example〕

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

As shown in Figure 4, 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. It is attached to an agricultural combine harvester.

Next, to explain the power transmission system of the combine in detail, as shown in Fig. 2, the power from the engine (8) mounted on the machine is transmitted to the transmission system to the threshing device (4), for traveling and for pre-reaping processing. It is branched into a transmission system for driving the parts. 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 pre-treatment 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 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), (18)
) 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), respectively, and these hydraulic clutches (20a) and (26'b
) is configured as a hydraulically operated traveling transmission that selectively supplies pressurized oil to . . . to perform transmission at a desired gear position.

When operating the gear transmission F (12) of the reaping pre-treatment transmission system and the auxiliary transmission (16) of the traveling system, the tension clutch (11) is operated, but the main transmission i
The operation (17) is performed only by operating the control valve (21) incorporated in the clutch operation angle hydraulic circuit shown in FIG.

In other words, the control valve (21) is (F+); (Fz),
By switching to the positions (F3) and (R), the hydraulic clutch for 1st forward gear (20a), the hydraulic clutch for 2 forward gears (20b), and the hydraulic clutch for 3rd forward gear (20a)
By selectively supplying pressure oil to the hydraulic clutch (20d) and the reverse hydraulic clutch (20d), a gear shift state of the transmission system in which the clutch is engaged is obtained, and the control valve (21) is set to the ('NO) position. By switching to the fully hydraulic clutch (20a),
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 operating pressure when the gear is changed from the neutral position (No).

Next, the flow of operation of the control device (23) that automatically operates the control valve (21) via the servo motor (24) will be described in detail. First, handling depth control is performed as follows.

As shown in Fig. 4, the conveying device (3) is composed 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. and both transport devices (6).

(7) It is integrally supported so as to be driven to swing around the horizontal axis (P,) of the fuselage. In this way, the reaping device (
The culm cut in step 2) is placed on the starting end side of the conveyor W (3), and the swinging operation changes whether the stem is taken on the stem side of the shaft frame or on the tip side. The handling depth is changed by passing the fixed position to the feed chain (25) on the lower side.

Then, a pair of rimiso i is placed above the locking and conveying device (7).
・Sinch type culm sensor (26a), (26b
) 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
) and (26b), so that the tip of the reaped husk culm is located between (26b), that is, the culm sensor (2
The conveying device (3) is oscillated so that the sensor 6a) is in the sensing state and the other culm sensor (26b) is in the non-detecting state.

Normal reaping work is performed at a traveling speed of third forward speed (F3). Then, as shown in the flowchart in Figure 1,
In step (Sl), a swing operation signal is sent from the control device (23) to the transport device (3) to perform a swing operation to change the handling depth within the sampling time (1) from a certain point to a certain point. Count the number of oscillations (n). In step (Sl), the allowable number of times (nl), which is the number of operations for handling depth control that does not cause problems in the conveyance system, is compared with the number of oscillations (n), and the number of oscillations (n) is larger. If so, the main transmission (17) is downshifted to second forward speed (F2) in step (S,), and step (S4.)
.

This state of forward second speed (F2) is maintained for a set time in the loop of (ss) and (st). and,
Again in steps (Sl) and (Sl), the number of oscillations (n
) and compares it with the allowable number of times (nl), and if the number of oscillations (n) is small, the main transmission (17) is shifted to the third forward speed (F, ) in step (S7) and the normal speed is increased. The speed is returned to the speed for reaping work.

Embodiment C] In the above-described embodiment, a stepped transmission (17) using a plurality of hydraulic clutches is used, but this may be configured as a hydrostatic continuously variable transmission.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester according to the present invention, FIG. 1 is a flowchart showing the flow of operation, and FIG.
3 is a hydraulic circuit diagram, and FIG. 4 is a side view of the vicinity of the pre-harvesting section of the combine harvester. (23)... Control means.

Claims (1)

[Claims] A combine harvester equipped with a means for detecting the frequency of handling depth control, and a control means (23) for automatically decelerating the traveling speed when the handling depth control frequency exceeds a set value.