JPS5846283B2 - reaping harvester - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reaping harvester, such as a combine harvester, which is equipped with a mechanism for driving and lowering a reaping section.

Generally, the raising and lowering of the reaping part in a reaping harvester includes raising and lowering to adjust the cutting height during reaping work, and raising and lowering to rotate the machine at the edge of the field.
In order to improve cutting height adjustment accuracy through fine adjustment, it is desirable that the lifting speed be low.

However, if the reaping section elevation speed is set to be low as described above, it takes too much time to raise and lower the reaping section when the machine turns, resulting in a decrease in work efficiency.

In view of the above, an object of the present invention is to enable accurate cutting height adjustment during reaping work, while suppressing a decrease in work efficiency due to this adjustment.

The reaping/harvesting machine according to the present invention is provided with a device that automatically and reversibly changes the reaping part lifting speed by the mechanism to a greater degree during the disengaged operation of the steering clutch than when the clutch is engaged. It is characterized by

That is, according to the present invention, in conjunction with the operation of disengaging the steering clutch, which is essential for turning the aircraft, the lifting speed of the reaping section can be automatically changed to a greater degree than when the clutch is engaged, so that the reaping operation can be improved. For medium cutting height adjustment, the reaping section is raised and lowered at a very low speed to accurately adjust the cutting height, while when the machine turns, the reaping section is raised and lowered at high speed to prevent a decrease in work efficiency. .

Furthermore, since the lifting speed of the reaping section can be automatically changed by disengaging the steering clutch for turning the machine, it has become possible to turn efficiently as described above without any special operation.

In addition, as a specific means for preventing the lifting speed of the reaping section from increasing due to the steering to run the machine along the row of planted stem culms during the reaping operation, the above-mentioned steering clutch is disengaged. Means for configuring the device to operate only when the activation time reaches a predetermined time or more; means configuring the steering clutch/brake to operate when the steering clutch/brake is in a brake activation state; can be mentioned.

Hereinafter, embodiments of the present invention will be described based on the drawings.A reaping section 1 is connected to the front part of the machine, which is equipped with a pair of left and right crawlers 5, 5, a threshing section 6, and a riding driving section 7, so as to be able to swing up and down. A hydraulic cylinder 8 which is installed and acts on the main U handle 1, a hydraulic pump 10 driven by an engine 9, and both 9, 10.
In a combine harvester equipped with a reaping section drive elevating mechanism 2 consisting of a three-position switching valve 12 interposed in a hydraulic pressure supply circuit 11 between the When either one of the installed steering clutches 3, 3 is in the disengaged state, the reaping section drive lifting mechanism 2
A device 4 is provided which automatically changes the raising and lowering speed of the reaping part to a higher speed than when both latches are engaged.

This speed change device 4 is provided with switches 15, 15 for detecting that the levers 14 14 of the steering clutches 3, 3 linked to the operating levers 13, 13 are in the disengaged state, and also switches The hydraulic pressure supply circuit 11 is provided with a variable throttle valve 16 that changes the expansion and contraction operation speed of the cylinder 8 by adjusting the oil amount, and at least one of the switches 15, 15 is detected and activated, and this detection operation is set. A controller 17 is provided that automatically opens the variable throttle valve 16 when the time is continued, and maintains the variable throttle valve 16 in the throttled state when both switches 15 are in the non-detection state. Only when the disengagement time of the steering clutches 3, 3 reaches a set time or more, the raising and lowering speed of the reaping section 1 is set to normal.

According to the above configuration, by setting the time from when the steering clutches 3, 3 are disengaged to when the speed change device 4 is activated, the aircraft can be made to travel along the row of planted culms. During short-time steering operations, the lifting speed of the reaping unit 1 is maintained at a slow state, and the cutting height can be adjusted accurately by raising and lowering the reaping unit 1. During the daytime steering (turning) operation, the vertical speed of the reaping section 1 is automatically increased to allow the turning operation to be carried out efficiently.

Fig. 3 shows a clutch/brake system in which the steering clutches 3, 3 are sequentially switched to a first state in which the clutch is engaged, a second state in which the brake is not activated when the clutch is disengaged, and a third state in which the brake is activated when the clutch is disengaged. When at least one of the switches 15 and 15 configured to detect that these are in the third state is activated, the variable throttle valve 16 similar to the embodiment is automatically opened and the reaping section lifting speed is adjusted. a speed change device 4 configured to have a higher speed than when both steering clutches 3 are in the first state and the second state.
Another embodiment is shown below.

In this case, one of the steering clutches 3 or 3 is switched from the first state to the second state to perform steering for driving the machine along the row of planted culms during reaping work, By rotating the machine at the edge of the field by switching one of the steering clutches 3 or 3 from the first state to the second state, the speed of raising and lowering the reaping part for adjusting the cutting height during reaping work is slowed down. The speed of raising and lowering the reaping section when turning the machine can be increased.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the reaping harvester according to the invention,
FIG. 1 is an overall side view, FIG. 2 is a steering and reaping section elevation control system diagram, and FIG. 3 is a control system diagram showing another embodiment. 1... Reaping section, 2... Drive lifting mechanism,
3... Steering clutch, 4... Device.

Claims (1)

[Scope of Claims] 1. In a reaping harvester equipped with a mechanism 2 for driving and lowering the reaping section 1, when the steering clutch 3 is in the disengaged state, the reaping section raising and lowering speed by the mechanism 2 is automatically and reversibly adjusted to engage the clutch. A reaping harvester characterized in that it is provided with a device 4 that changes the shape of the dog when it is in operation. 2. The reaping harvester according to claim 1, wherein the device 4 is configured to operate only when the disengagement time of the steering clutch 3 reaches a set time or more. 3. The steering clutch 3 is a clutch/brake, and when the steering clutch 3 is in a brake operating state, the device 4 is configured to operate.
The reaping harvester described in section.