JPH0210060Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a traveling device for a combine harvester.

Combine harvesters generally have a grain tank placed on the right side of the threshing device, and as the grain tank is filled with grain, the weight balance tends to be biased toward the right side of the machine. Therefore, as the grain tank is filled with grain during reaping in wet fields, the machine body leans to the right, causing problems such as deterioration of straight-line performance.

Therefore, as a means to suppress the tilting of the aircraft due to the collapse of the aircraft weight balance, we developed the
As shown in Japanese Patent No. 166227, a means has been proposed for automatically widening the interval between the left and right crawler traveling devices as the weight of the cargo carried on the aircraft increases.

According to the above means, even if the weight balance of the machine is about to collapse due to filling grain into the grain tank, the interval between the crawler traveling devices is automatically widened, the weight balance is corrected, and the tilting of the machine to the right is suppressed. However, since the spacing between crawler traveling devices is determined only by the weight mounted on the aircraft,
On the contrary, problems sometimes occurred.

For example, in large fields, splitting work is sometimes carried out, but in this case, as the harvest progresses and the weight of the grain tank increases, the gap between the left and right crawler traveling devices, the so-called tread width, increases and the unharvested grain is cut. There was a risk of stepping on the culm.

In addition, when harvesting crops that have been raised on ridges, even if the left and right crawler traveling devices are initially located on or between the furrows and the machine is horizontal, only one of the crawler traveling devices will be used as grain is collected. There were times when the aircraft would get stuck on the ridges and the aircraft would tilt.

This invention was made with attention to these points, and the purpose is to provide a traveling device for a combine harvester that can perform suitable traveling according to field conditions, progress of harvest, etc. That's what I do.

To achieve the above object, the present invention features a traveling device for a combine that is equipped with a pair of crawler traveling devices on the left and right sides of the machine, and a threshing device with a suction port on the left side with respect to the forward direction of the machine. Of the left and right crawler traveling devices,
Only the crawler traveling device on the right side is configured to be movable left and right with respect to the body frame by means of a hydraulic cylinder.

According to the above configuration, by driving and moving the right crawler traveling device outward in a wet field, it is possible to improve the weight balance of the machine and suppress the tilting of the machine to the right accompanying grain collection.

Further, when turning at the edge of a ridge, the interval between the crawler traveling devices can be widened to improve the turning performance by driving the one-sided crawler traveling device.

Furthermore, by setting the interval between the crawler traveling devices small during splitting, it is possible to travel without stepping on uncut grain culms.

Furthermore, by appropriately selecting the position of the right crawler traveling device during harvesting of ridged crops, the left and right crawler traveling devices can be positioned on or between the furrows and travel.

As explained above, according to the present invention, the interval between the left and right crawler traveling devices can be arbitrarily set using a hydraulic device, so that traveling can be performed in a suitable installation state according to field conditions, harvest conditions, traveling conditions, etc. Now I can do it.

Moreover, since only the right crawler traveling device, which is on the mowed land side during the normal mowing mode, is moved left and right, the left crawler traveling device, which is located on the uncut land side, can move horizontally, regardless of the change in the crawler traveling device interval. The device is always at a fixed position relative to the machine body, and does not pile up mud at the base of uncut grain culms due to mud pushing as the traveling device sinks in wet fields. It is now possible to perform circular mowing with high work efficiency using the left side of the machine as a reference, similar to that of a combine harvester.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an overall side view of a self-removal type combine harvester A. This combine A has a reaping section 16 at the front of the machine which is self-propelled by left and right crawler traveling devices 2a and 2b.
A threshing device 18 having a suction port 17 on the left side of the machine is mounted behind it. As shown in FIGS. 2 to 5, the frames constituting the traveling body of this self-extracting combine harvester A are located in the left and right center of the machine, one body frame 1, to the left of this, and a left crawler traveling device. 2a, and a right track frame 4 located on the right side and supporting the right crawler traveling device 2b.Furthermore, the right track frame 4 is supported so as to be movable from side to side relative to the aircraft frame. These are detailed below.

A cylindrical member is used for the body frame 1, and support frames 5, 5 are attached to two places on the left side, and a left truck frame 3 is attached to the other end of the support frames 5, 5, so that the left truck frame 3 is arranged parallel to the fuselage frame 1 and at a low level.

Further, a guide frame 6, a hydraulic cylinder 7, and a guide frame 6 are sequentially disposed at equal intervals on the fuselage frame 1 so as to pass through the fuselage frame 1 on the left and right sides. By attaching the truck frame 4, the right truck frame 4 is disposed parallel to the fuselage frame 1 and at a low level, and can be moved left and right by the drive of the hydraulic cylinder 7.

Guide frames 6, 6 and a hydraulic cylinder 7 are arranged on the fuselage frame 1 in the following structure so that the right track frame 4 can be moved by one hydraulic cylinder 7. That is, the guide frame 6 is composed of a pipe frame 6a fixed to the fuselage frame 1 so as to pass through it from left to right, and a slide frame 6b that is slidably inserted into the pipe frame 6a. A plate-shaped body 9 is connected to the left end, that is, the left exposed end of the pipe frame 6a, by bolts. In addition, this plate-shaped body 9 controls the amount of extension of the slide frame 6b by coming into contact with the right end of the pipe frame, and by setting the amount of extension of the two front and rear slide frames 6b, 6b to be equal, the right track can be adjusted. The frame 4 is adapted to maintain a state parallel to the fuselage frame 1 at the extended end. or,
The fuselage frame 8 is also a pipe frame 6a.
By coming into contact with the left end, the right truck frame 4 and the fuselage frame 1 are maintained in a parallel state at the contracted end.

The hydraulic cylinder 7 is inserted into a cylindrical body 10 that is welded and fixed through the left and right sides of the fuselage frame 1, and has a structure that will not be damaged due to the difference in the amount of extension of the front and rear slide frames 6b, 6b when the hydraulic cylinder is driven. It's getting old. In other words, the inner diameter of the cylindrical body 10 is set larger than the outer diameter of the hydraulic cylinder 7,
Two collar members 11, 11 are fixed to the hydraulic cylinder 7 so as to sandwich the cylindrical body 10 so that there is a free movement gap in the cylinder radial direction and the cylinder cannot be moved in the cylinder expansion/contraction direction. The hydraulic cylinder 7 is arranged so that the cylinder rod 7a faces to the right, and a support frame 8 is bolted to the end of the cylinder rod.

Further, the left and right track frames 3 and 4 are provided with a drive sprocket 12, a plurality of idle wheels 13..., and a tension wheel 14.
are sequentially supported, and a crawler belt 1 is attached to these.
It is designed to be wound in 5 turns.

As shown in Fig. 6, the present invention has a structure in which hydraulic cylinders 7, 7 are disposed at two positions, front and rear, via cylinders 10, 10, thereby making it possible to move the truck frame 4 from side to side. In addition, it is also possible to have a structure other than the example in which the cylindrical body is installed on the underside of the fuselage frame instead of penetrating the fuselage frame. It is also possible to implement multiple methods.

[Brief explanation of the drawing]

The drawings show an embodiment of the traveling device for a combine harvester according to the present invention, and FIG. 1 is an overall side view of the combine harvester;
Figure 2 is a perspective view showing the fuselage frame and truck frame, Figure 3 is a sectional view taken along the - line in Figure 2, Figure 4 is a sectional view taken along the - line in Figure 2, and Figure 5 is a sectional view of the crawler traveling device and frame. FIG. 6 is a schematic front view and a schematic plan view showing another embodiment of the truck frame drive structure. 1... Airframe frame, 2a... Left side crawler traveling device, 2b... Right side crawler traveling device, 7
... Hydraulic cylinder, 17 ... Suction port, 18 ... Threshing device.

Claims (1)

[Scope of utility model registration request] A pair of crawler traveling devices 2a, 2 on the left and right sides of the aircraft
In the traveling device of a combine, which is equipped with a threshing device 18 having a handling port 17 on the left side with respect to the forward direction of the machine, the right crawler traveling device is equipped with A traveling device for a combine harvester in which only 2b is configured to be movable left and right with respect to a body frame 1 by a hydraulic cylinder 7.