JPS6220379Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a crawler traveling device for agricultural machinery such as a combine harvester, in which a crawler is wound around a drive sprocket, a crawler tensioning wheel, and a group of grounding wheels. The object of the present invention is to suppress the slip phenomenon caused by the shearing action of the soil and increase the propulsion force, and to effectively suppress the vibration of the aircraft body when traveling on the road.

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

Fig. 1 shows a crawler traveling device installed in an agricultural machine such as a combine harvester, in which a drive sprocket 2 is provided at one end in the longitudinal direction of a truck frame 1, and a crawler tensioning wheel 3 is provided at the other end. ,3
A plurality of crawler guiding grounding wheels 4 are provided between them, and propulsion lugs 5 are integrally protruded from the outer circumferential surface of these wheels 2, 3, 4 at regular intervals in the circumferential direction, using an elastic material such as rubber. A crawler 6 consisting of the following is wound.

As shown in FIGS. 1 and 2, among the plurality of ground contact wheels 4 provided at the lower end of the truck frame 1, two wheels 4, 4 adjacent to the front side and adjacent to the rear side. The two rolling wheels 4, 4 located respectively,
It is rotatably attached to the tip of an arm 7 which is Y-shaped when viewed from the front as an example of a support member rotatably connected to the truck frame 1, and is fitted into the rotatable base end of the arm 7, A stopper 8 for regulating rotation of the arm 7 is detachably attached to the truck frame 1. As shown in FIG. 1, when the arm 7 is fixed to the truck frame 1 in an inverted Y-shape, the lower ends of the groups of ground contact wheels 4 are arranged in tandem in a straight line in the front and back, and the crawler In a dry land running mode where the ground contact side is flat, and when the arm 7 is fixed to the truck frame 1 in a Y-shaped position as shown in FIG. They are arranged in a uniform manner, and the ground contact side of the crawler has an uneven shape, and the ground contact wheels 4, 4
By increasing the span between the wheels and increasing the ground pressure of the downwardly protruding portion of the wheels, it is configured to be able to freely switch to a wetland driving mode that improves propulsion while suppressing the slip phenomenon.

The stopper 8, as shown in FIG.
A first locking part 8a that acts on the upper inclined surface of the arm 7 to fix it in the V-shaped position, a second locking part 8b that acts on both sides of the arm 7 when fixing it in the inverted Y-shaped position, and a truck frame. 1 and a connecting portion 8c provided with a mounting hole a for attachment and detachment using bolts.

It should be noted that the arm 7 may be provided with a drive device such as a hydraulic cylinder so that the driving mode can be easily switched. In this case, when driving on dry land, the driving mode may be changed to wetland driving mode as shown in FIG. 3. It is also possible to reduce the ground contact area of the crawler 6 and improve the turning performance.

In summary, the present invention provides a crawler traveling device for agricultural machinery in which some of the combinations of two mutually adjacent wheels 4, 4 of the group of ground contact wheels 4 can be rotatably fixed to the track frame 1. It is rotatably supported on a support member 7 which is pivoted to
. . . A dry land running mode in which the lower end positions of the groups are arranged in a straight line in front and back and the crawler contact side is flat, and two rolling wheels 4 supported on a support member 7,
One of the wheels 4 protrudes downward and the ground roller 4
...The lower end of the group is arranged vertically irregularly, and the crawler is configured to be able to freely switch to a wetland running mode in which the ground side is uneven.

That is, as the support member 7 is rotated, some of the combinations of two mutually adjacent wheels 4, 4 of the group are rotated around the rotation axis of the support member 7. When running on the road, all of the wheels 4, 4 that make up the combination are fixed in contact with the crawler 6, and the lower end positions of all the ground wheels 4 are aligned in a straight line in the front and back. Place it in
By switching to a dry land running mode in which the ground contact side of the crawler 6 is flat, vibrations of the aircraft body can be effectively suppressed, and when running on soft ground such as wet fields,
When only one of the wheels 4, 4 constituting the combination is fixed in contact with the crawler 6, this wheel 4 is projected downward from its position in the dry land running mode, and the ground wheel 4 is fixed in contact with the crawler 6. By increasing the pitch between 4 and 4, it is possible to switch to a wetland running mode in which the ground contact side of the crawler 6 becomes uneven, and simply,
The ground pressure of the four parts of the rolling wheels that protrude downward is increased,
In addition to increasing the shear resistance of the soil, the support spacing of the crawlers 6 is also significantly increased, making it easier for the crawlers 6 to bend upward due to ground pressure, which prevents the wheels from protruding downward when running on soft ground. It is possible to increase the amount of soil carried by the crawler without setting a large amount, making the entire structure more compact.
We were able to more effectively suppress the slip phenomenon caused by the shearing action of the soil and improve the propulsion force.

In addition, compared to the conventional wetland running mode in which the ground contact side of the crawler 6 is flat and the crawler 6 as a whole is difficult to sink into the soil, in the wetland running mode according to the present invention, the crawler 6 partially sinks into the soil. Since it sinks deeply into the soil, the surface of soft ground is generally the softest, and the deeper it gets, the harder it gradually becomes. According to the crawler traveling device of the present invention,
Even if the ground is soft, the running reaction force of the crawler 6 can be applied to relatively hard soil, and the propulsion performance can be improved more efficiently.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the crawler traveling device for agricultural machinery according to the present invention, and FIG. 1 is an overall side view, and FIG.
The drawings are a sectional view taken along the line -- in FIG. 1, FIG. 3 is a schematic side view showing a wetland running mode, and FIG. 4 is a perspective view of the stopper. DESCRIPTION OF SYMBOLS 1... Truck frame, 2... Drive sprocket, 3... Crawler tension roller, 7... Support member, 4... Ground contact roller, 6... Crawler.

Claims (1)

[Scope of utility model registration request] In a crawler traveling device for an agricultural machine, in which a crawler 6 is wound around a drive sprocket 2, a crawler tension roller 3, and a group of ground rollers 4, adjacent to each other of the group of ground rollers 4... Some of the combinations of the two rolling wheels 4, 4 are rotatably supported on a support member 7 which is rotatably fixed to the truck frame 1, and by rotationally fixing operation of the support member 7. , all the ground-contacting wheels 4 . . . a dry land running mode in which the lower ends of the group are arranged in a straight line longitudinally and the crawler's ground-contacting side is flat, and the two rollers 4 supported on the support member 7, One of the ground rollers 4 is positioned downwardly, and the lower end positions of the group are arranged vertically irregularly, and the crawler ground side is configured to be freely switchable to a wetland running mode in which the ground contact side is uneven. A crawler traveling device for agricultural machinery characterized by the following.