JPS5825771Y2 - reaping harvester - Google Patents

Description

[Detailed Description of the Invention] The present invention includes a control device 20 that is controlled based on the detection result of the operating position of the artificial operating tool 12 for raising and lowering the reaping section and the actual height position detection result of the reaping section 4, and It is equipped with a drive device 11 that forcibly drives the reaping section 4 up and down in response to commands from the device 20, and a single traveling speed change lever 22 that sequentially changes the traveling speed of the machine from a forward traveling state to a backward traveling state. Relating to a reaping and harvesting machine equipped with

This type of reaping/harvesting machine has the advantage that the reaping section can be driven up and down to a preset height corresponding to the operating position of the human operating tool, making it easy to adjust the reaping section to the desired height. There is.

In general, not only reaping and harvesting machines but also running machines tend to have their front parts floating in the direction of travel due to drive reaction force.

Furthermore, in a reaping harvester that travels on soft ground, the amount of sinking at the rear in the direction of travel is greater than at the front in the direction of travel facing new ground.

For this reason, during reaping work in the field, if you move backwards with the reaping part lowered to the reaping position near the ground, the rear part in the direction of travel (the reaping part that extends far from the crawler traveling device) will cause the above-mentioned problem. This will cause it to hit the ground.

For this reason, in the past, the reaping part was raised each time the reaping part was moved backwards, but when working on the edge of a ridge, etc., the reaping part is moved forward and backward frequently, and the above-mentioned raising operation is necessary. It had become troublesome and troublesome.

The purpose of the present invention is to provide a reaping and harvesting machine that solves the above problems with a simple configuration and is also improved in terms of usability.

The technical features of the reaping and harvesting machine of the present invention are that a forward speed change range and a reverse speed change range are set within the speed change operation range of the traveling speed change lever, and a neutral operation range is set at an intermediate position between the two speed change ranges. Further, within the neutral operation range, a forward neutral range and a reverse neutral range are set, which can be selected by swinging the travel shift lever, and furthermore, a reverse neutral range is set close to the reverse shift range. A detection device is provided for detecting the presence or absence of the traveling speed change lever across the range and the reverse speed change region, and the drive device is operated to the reaping part upward side based on the detection result of the presence of the travel speed change lever by the detection device. By providing an operating device for switching the control device, the following effects can be achieved.

In other words, when the machine moves backwards, the reaping section can automatically rise to an appropriate height without touching the ground, so there is no need to perform special operations to raise the reaping section every time the machine goes backwards, as mentioned above. This can lead to labor savings.

Particularly, according to the present invention, a forward neutral range and a reverse neutral range are set within the neutral operation range of the travel speed change lever, and the reaping section is operated only when the speed change lever is in the reverse neutral range and the reverse speed range. Because it is configured to raise, for example, when forward movement is temporarily stopped, the reaping section does not rise, and there is an advantage that the subsequent reaping operation can be carried out immediately; However, since the reaping section is held in a raised state, there is an advantage that the subsequent reverse movement can be performed quickly, and the advantage is that the reaping section does not descend even if the operator has no intention of moving the aircraft forward (reaping work). There is.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The figure shows a combine harvester in which a reaping section 4 is connected to the front part of the machine on which a control seat 2, a threshing device 3, etc. are mounted on a crawler traveling device 1. As described in 2.1, the culm of the planted stem is configured to be harvested.

That is, a plurality of planted stem culms to be planted are pulled up into an upright position by the front pulling device 5, the base end of the plant is cut by the reaping device 6, and the cut stem culms are transferred to the auxiliary conveyance device 7. The combined stem culms are conveyed rearward by the vertical conveyance mechanism 8, and at the end of the conveyance line, they are changed to a sideways posture and delivered to the feed chain 9 of the threshing device 3. It is configured.

The reaping section 4 includes an elevating frame 1 that is pivotally supported on the main machine.
0, and is configured to be forcibly raised and lowered by the expansion and contraction of a hydraulic cylinder 11 interposed between the machine and the frame 10. The operation structure of No. 11 will be explained based on FIG.

That is, a swing lever 12 is mounted near the control seat 2 as an artificial operating tool for raising and lowering the reaping section.

This lever 12 is pivoted so as to be able to swing back and forth in the front and rear directions around a fixed fulcrum Y on the machine side, and is configured to be fixed and held at a required operating position via a friction mechanism (not shown). ing.

Further, an arm 13 connected from the base of the lever 12 is connected to an intermediate point A of a first link 15 via a rod 14 and a hydraulic cylinder 23, which will be described later, and one end of the first link 15 is connected to an intermediate point A of a first link 15. It is operatively connected to a bracket 18 provided on the support column 17 of the lifting device 5 via a connecting rod 16.

On the other hand, an L-shaped second link 19 that swings laterally around a fulcrum Z parallel to the front-back direction of the machine is attached to the main machine side, and one end of this second link 19 and the other end of the first link 15 are attached. The other end of the second link 19 is connected to a hydraulic cylinder control valve 20 fixedly installed on the machine side.
The operating rod 20a is engaged and connected to the operating rod 20a.

According to the above configuration, as described below, the swing lever 1
The hydraulic cylinder 11 is actuated in accordance with the swinging operation of the lever 12, and the reaping part 4 is controlled to move up and down to a preset height according to the operating position of the lever 12.

That is, when the lever 12 is swung forward, one end B of the first link 15 is pushed down around the other end C while the reaping part 4 remains fixed, as shown in FIG. 3A. Accordingly, the second link 19 is swung in the direction a about the fulcrum Z, and the operating rod 20 of the valve 20 is
When a is pulled out, the hydraulic cylinder 11 is contracted and the reaping section 4 is lowered.

At this time, the other end C of the first link 15 is lowered as the reaping part 4 is lowered, so if the amount of descent of the other end C of the first link is greater than the amount of descent of the intermediate fulcrum A of the first link 15,
As shown in Figure 2, the first link 15 is located at its intermediate fulcrum A.
The second link 19 is swung in the direction b, the operating rod 20a of the valve 20 is pushed back to neutral, and the lowering of the reaping part 4 is stopped.

That is, the amount of descent of the reaping section 4 is fed back to the operation system of the valve 20, and the reaping section 4 is lowered by an amount corresponding to the amount of operation of the operating lever 12.

Further, in order to raise the reaping section 4, by swinging the control lever 12 backward, a feedback operation opposite to the above operation is performed, and the reaping section 4 is raised by the amount by which the lever 12 is operated.

Further, as shown in FIG. 4, the crawler traveling device 1 is interlocked with a hydraulic continuously variable transmission 21 to which the power of an installed engine 27 is transmitted, and the speed change arm 21 a of this transmission 21 is , the forward speed and reverse speed are configured to be continuously changed as the speed change lever 22 provided near the seat 2 is swung back and forth through a link mechanism 28. .

In other words, as shown in FIG. 5, the more the lever 22 is swung forward along the forward guide area F of the guide frame 29, the higher the forward speed becomes, and the more the lever 22 is swung rearward along the reverse guide area R. The vehicle is in a high-speed reverse state, and switching between forward and backward travel is performed by swinging the lever 22 in the horizontal direction. Neutral positions N1 and N2 are formed during operation and during reverse operation.

Further, this combine harvester is constructed as described below in order to raise the reaping section 4 to an appropriate height position where there is no risk of it coming into contact with the ground in the backward traveling state.

That is, the rod 14 and the first link 15 are fixedly connected to the rod 14 and pivotally connected to the first link 15, and automatically elastically return to the extended state. A hydraulic cylinder 23 is interposed.

Also, when the gear shift lever 22 is operated to the reverse range R or the neutral position N1 during reverse travel, this lever 2
2 is provided with a switch 25 that is operated to close via a spring plate 24 that is swung into contact with the switch 25.
and an electromagnetic valve 2 that controls the expansion and contraction operation of the cylinder 23.
6 is connected.

In the embodiment, the hydraulic cylinder 23 corresponds to an operating device that switches the control valve 20 to operate the reaping part upward, and the spring plate 24 and the switch 25 detect the presence or absence of the travel gear shift lever. It constitutes a detection device for

When the switch 25 is closed, the electromagnetic valve 2
6 is operated to shorten the cylinder 23, and as a result, the first link 15 is lifted in the same way as the swing lever 12 is operated to the upward side. The hydraulic cylinder 11 as shown in
is operated so that the reaping section 4 is raised.

In the embodiment, a link mechanism is used to operate the drive device 11 for raising and lowering the reaping section 4 based on the position detection result of the human operating tool 12 and the height detection result of the reaping section 4. However, for example, the position of the human operating tool 12 and the reaping part 4
The present invention may also be applied to a type that electrically detects the height of the human operating tool 12 as in the embodiment.
In addition to applying a displacement to the position detection result of the reaping section 4, it may also be implemented by applying a displacement to the height detection result of the reaping section 4.

[Brief explanation of the drawing]

The drawings show an embodiment of the reaping and harvesting machine according to the present invention, in which Fig. 1 is a side view of the combine, Fig. 2 is a perspective view showing the hydraulic synonda operating structure, and Fig. 3 is a schematic diagram showing the operating state of the combine harvester. 4 are perspective views showing the traveling transmission structure, and FIG. 5 is a plan view of the guide frame. 4... Reaping section, 11... Drive device, 1
2...Artificial operation tool.

Claims (1)

[Scope of utility model registration request] The reaping section 4 is controlled by a control device 20 that is controlled based on the detection result of the operating position of the manual operation tool 12 for raising and lowering the reaping section and the actual height position detection result of the reaping section 4, and the command from the control device 20. Drive device 11 that forcibly drives up and down
In the reaping/harvesting machine, the reaping/harvesting machine is equipped with a single traveling speed change lever 22 that sequentially changes the machine speed from a forward traveling state to a backward traveling state. A shift range F and a reverse shift range R are set, and a neutral operation range N is set at an intermediate position between the two shift ranges F and R, and within the neutral operation range N, the traveling shift lever 22 is A forward neutral region N1 and a reverse neutral region N2, which are selectable by a rocking operation, are set, and further, the aforementioned A detection device 24 for detecting the presence or absence of the travel gear shift lever 22.
25, and the control device 2 is configured to operate the drive device 11 to the reaping section upward side based on the detection result of the presence of the travel gear shift lever 22 by the detection device 24.25.
A reaping/harvesting machine characterized by being provided with an operating device 23 for switching between zero and zero.