JPS5927713Y2 - Reaping work vehicle - Google Patents

Description

[Detailed description of the invention] In order to keep the cutting height constant, this invention attaches a grounding body that can move up and down following the ground to the reaping section that is provided on the vehicle body so that it can go up and down. The present invention relates to a reaping vehicle equipped with a mechanism for detecting the ground level of the reaping section based on the above.

Conventionally, for this type of work vehicle, if the operator neglects to lift the reaping section in advance when reversing, an unreasonable external force will be applied to the grounding body due to the stump or unevenness of the ground, causing the grounding body to become damaged. Situations often occurred in which the equipment was damaged.

As a means of solving this problem, a document in Takekai No. 52-30625 discloses that the backward movement state of the aircraft is detected by the forward swinging of a height-above-the-ground detection sensor, which is suspended from the reaping section so that it can swing back and forth. However, a technique has been proposed in which the height of the reaping section is positioned higher than when moving forward.

However, with this configuration, in order for the sensor that is tilted forward when the aircraft is moving forward to detect the backward state, it must pass through the vertical position and become tilted backward; There is a risk that the detection mechanism at ground level may be damaged by being pushed up from the ground.

Technical measures taken by this invention.

In the present invention, in the reaping vehicle described at the beginning of the detailed description, the operating tool of the ground level detection mechanism is configured by a link device whose one end is pivotally supported on the reaping section side, and the grounding body is connected to the reaping section. It is attached to the roadside side of the link device, which is away from the pivot point on the side, so that it can swing freely around an axis along the lateral direction of the vehicle body. A stopper that restricts backward swinging of the body beyond a certain level and maintains the desired ground posture in a forward running state, and a reverse motion detection switch that detects forward swinging are installed at the free end of the link. The present invention is characterized in that it is equipped with a mechanism that is attached to the side and automatically raises the front sorting section based on the detection of this switch.

Functions and effects of the present invention.

If the grounding body is displaced forward due to a collision with the ground or a stump when reversing, the reaping section is automatically raised, which reliably prevents damage to the grounding body as described above. This also eliminates the operational inconvenience of having the operator lift the reaping section every time.

Moreover, since the means for detecting the ground level and the means for detecting the forward and backward movement of the aircraft are provided separately, and the methods of obtaining the detection results are different (vertical movement and forward/backward rocking), the configuration as a grounding body can be used for both purposes. However, by also using the rain detection means as mentioned above, the conventional prohibition can be solved, and even if an upward force from the ground acts on the grounding tool, the means for detecting the ground level plays a role in dissipating this upward force. Since the structure is simple, good operation can be achieved.

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

To configure a combine harvester as an example of a reaping work vehicle, an engine and a control section 4 are arranged on a vehicle body having a crawler traveling device 1, and a weeding tool 8 and a forced pulling device 23 are installed in front of the vehicle body.
, a reaping section 2 consisting of a cutting blade 6 and a culm conveying device 24 is disposed, and a threshing section 3 and a waste straw processing device 34 such as a shredding device and a bundling device are disposed at the rear. The culm is pulled up and harvested, and the cut culm is transferred to the feed chain 3.
The structure is such that the straw is threshed while being transported by the threshing section 5, and the straw in the threshing section is cut and bundled in a processing device 34 and then released.

As shown in FIG. 5, the entire reaping section 2 is driven to swing around the transverse axis 4 of the vehicle body by a fluid pressure cylinder 5 controlled by an electromagnetic valve 40, and as described later, when turning or backing up, It is configured so that it can be raised and lowered as desired by the operating lever of the control unit 4, and is automatically braked for raising and lowering based on the detection result of the detection device I provided with the grounding body 16.

Next, this detection device 7 will be explained.

A weeding tool 8 is attached to the tip, and a cutting blade frame 1 is attached in the middle.
0 is attached to the support rod 9, a link 13 is attached to the support rod 9 so as to be able to swing vertically around the axis R, and a detection mechanism 15 fixed to the support rod 9.
The ground body 16 is attached to the storage box so as to be movable up and down via a link device 14 consisting of bent links 11 and 12, and the ground body 16 is urged toward the ground side by a spring 18 that acts to extend the bent links 11 and 12. death,
As the vehicle travels, the grounding body 16 is raised and lowered to follow the unevenness of the field.

At the rear end of the link 13, a semicircular plate-shaped body 31 is fixed with a stopper 32, 32 that limits the swing range of the grounding body 16.
is fixedly supported, and a tension spring 3 is disposed between the rod 30 supporting the grounding body 16 and the bent link 120.
3 is interposed, and when moving forward, the grounding body 16 is held in contact with the stopper 32 on the rear side, and when moving backward, the grounding body 16 collides with a protrusion on the ground or a stump and is displaced forward. However, it is configured to be held in contact with a stopper 32 on the front side.

(See Figures 2 and 3).

The detection mechanism 15, the contact body 16, and the operation tools of the control section 4 are linked to the electromagnetic valve 40 by the linkage mechanism shown in FIG. It is configured so that it can perform ground-following ascent and descent and automatic ascent as the aircraft moves backwards.

That is, if the up switch S0 or the down switch S2 is selectively operated with the manual automatic changeover switch SW1 set to the manual side, the relays R1 and R2 are activated, the corresponding contacts r1) and r2 are closed, and the electromagnetic valve is closed. Solenoids 5OL1 and 5OL2 for 40 are activated, and the reaping section 2 is raised and lowered by the hydraulic cylinder 5.

Then, the limit switch L□ is set to
It is operated when limit switch L2.6 is displaced forward, and limit switch L2.6 is turned on. L3 is the grounding body 16 when moving forward.
As it moves up and down to the set position with respect to the reaping part 2,
The limit switch L4 is provided in the detection mechanism so as to be turned on, and the limit switch L4 is turned on when the reaping section 2 reaches the upper limit, and when the switch SW1 is operated to the automatic side, the limit switch L□ The operation is as follows when there is no LL20 action.

First, when the grounding body 16 is lifted by a convex part of the field during forward movement, the limit switch L2 closes, and the contacts r and i connected to the relay R4 close.On the other hand, since the limit switch L4 is open (11), the relay R6 The normally closed contact r6 operated by is closed, and as a result, the lifting solenoid (SQLl) is energized, and the limit switch L2 is opened. , the limit switch L3 is closed, the contact r5 is closed by the relay R5Vc, and the limit switch L1 is open (11), so the normally closed contact r3b operated by the relay R3 is closed, and the lowering solenoid 5OL2 is energized. When the limit switch L3 is opened, the reaping part 2 is lowered, and when moving forward, the reaping part 2 is automatically raised and lowered according to the ground tracking of the grounding body 16, and the cutting height is kept constant.

When the grounding body 16 is displaced forward due to soil resistance or the like during backward movement, the limit switch L1 is closed, the contact r3a is closed by the relay R3, and the lifting solenoid 5
The structure is such that the reaping section 2 is raised by the action of the OL1.

In order to restrict the horizontal shaking of the support member 14, as shown in FIG. A pair of flat regulation members 21 and 22, one of which 21 is the support rod 9.
+C, the other 22 is a cover 20 fixed to the cutting blade frame 10
They are provided in a fixed state, respectively.

As shown in FIG. 3, the grounding body 16 is disposed below the support rod 9 so as to pass within the trajectory of the weeding tool 8 and between stumps. The control unit 4 is designed so that the grounding body can be floated and fixed when the elevation control of the unit 2 is not required.
A wire 9 that can be steered from the top is connected to bent links 11 and 12.

[Brief explanation of drawings]

The drawings show an embodiment of the reaping vehicle according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an enlarged side view of the main part, Fig. 3 is a cutaway view of the main part, and Fig. 4 is the same as Fig. 2. IV-IV line sectional view of 5th
The figure is a circuit diagram showing the reaping section vertical drive mechanism, and FIG. 6 is a control circuit for the reaping section vertical drive mechanism. 2... Reaping section, 14... Link device,
15...Detection mechanism, 16...Grounding body,
Q: Vehicle lateral axis, 32: Stopper, Ll: Reverse detection switch.

Claims (1)

[Scope of utility model registration request] A mechanism 15 for detecting the ground level of the reaping section 2 based on the elevation of the ground contacting body 16 by attaching it to the reaping section 2 which is movable up and down on the vehicle body so that it can move up and down while following the ground.
According to the reaping vehicle equipped with It is attached to the free end side of the link device 14, which is away from the pivot point on the second side, so as to be able to swing freely around the axis 0 along the lateral direction of the vehicle body, and supports the entire link device so as to be able to swing back and forth and move up and down. , a stopper 32 that restricts backward swinging of the grounding body 16 beyond a certain level and maintains the desired ground contact position in a forward running state, and a reverse motion detection switch L1 that detects forward swinging. , the reaping work vehicle is provided with a mechanism that is attached to the free end side of the link device 14 and automatically raises the reaping section 2 based on the detection of the switch L0.