JP2675209B2 - Crawler traveling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling device equipped on a moving agricultural machine such as a combine, and more specifically, a pair of front and rear swing arms is pivotally supported on a machine body frame, and the swing arms are swingable. The present invention relates to a crawler traveling device in which a track frame is pivotally connected to an end portion and a drive mechanism for swinging and driving both swinging arms with respect to a body frame is provided.

[0002]

2. Description of the Related Art The above-mentioned crawler traveling device is installed in a pair on the left and right sides of the traveling vehicle body, and when the vehicle body tilts to the left or right due to unevenness of a field scene, the height of each crawler traveling device against the vehicle body is increased. The height is changed so that the body can always be maintained in a horizontal posture. By the way, in such a crawler traveling device, when performing maintenance work such as replacement of the crawler belt or replacement of the rollers, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-106380, before and after the machine body frame, A swingable support stand is provided to switch between the standing posture and the sideways storage posture, and the crawler traveling device is levitated to the ground by switching the support stand to the standing posture with the track frame being lowered relatively to the machine frame. There was one configured to let.

[0003]

However, in the above-described conventional structure, since the working device is generally mounted on the upper part of the machine body frame, the provision of the support stand as described above causes a problem of interference with the working device. Since it occurs, it is a structure that is difficult to adopt in practical use, and it requires three steps of operation of lowering the crawler traveling device, switching the posture of the support stand, and further raising the crawler traveling device, resulting in poor work efficiency. There were also drawbacks. An object of the present invention is to eliminate the above disadvantages.

[0004]

A characteristic configuration of the present invention is that in the crawler traveling device described at the beginning, the front and rear pair is provided.
The auxiliary arm that protrudes below the grounding portion of the crawler belt along with the downward swing of the swing arm is detachably connected to each swing arm.

[0005]

[Action] to the pair of the swing arm back and forth for changing the machine body frame relative height of the track frame, and connecting the auxiliary arm and is swung by the drive mechanism, the auxiliary
Since the auxiliary arm projects below the ground contact portion of the crawler belt, the entire crawler belt floats above the ground, and operations such as exchanging the crawler belt can be performed. Moreover, since the auxiliary arm is connected to the swing arm interposed between the track frame and the machine body frame, it is positioned below the machine body frame, and the work device or the like above the machine body frame is mounted. It does not interfere with the device.

[0006]

Therefore, due to the rational structure, it is not necessary to consider interference with the device mounted on the body frame, and further, with each auxiliary arm once mounted, the crawler belt can be removed and mounted. Can be performed as it is, and furthermore, the machine body can be moved and moved while each auxiliary arm is stored above the grounding portion of the crawler belt, resulting in excellent workability.

[0007]

Embodiments will be described below with reference to the drawings. FIG.
Shows a crawler traveling device for a combine. This crawler traveling device has a front drive wheel 1 and a rear tension wheel 2.
And the rubber crawler belt 4 is wound around each of the plurality of grounded rollers 3 arranged in parallel between them, and the power from the machine body is transmitted to the drive wheels 1 to rotate the crawler belt 4 for traveling. It is configured to drive.

The drive wheel 1 is supported on the body frame 5 side, the other tension wheels 2 and each grounding roller 3 are supported on the track frame 6, and the track frame 6 is in a parallel posture with respect to the body frame 5. It is configured to move up and down while maintaining. More specifically, as shown in FIG. 2, at two front and rear portions of the machine body frame 5, swinging on support shafts 8, 8 rotatably supported by boss portions 7, 7 penetrating the machine body frame 5 in the lateral direction. An arm 9 is integrally rotatably attached, and a swing end of the swing arm 9 is pivotally connected to a track frame 6 via a support shaft 10. The swing arm 9 on the front side
The oscillating end of is pivotally connected via an auxiliary link 11 for absorbing the assembly error. The drive arms 12 are integrally rotatably extended upward from the ends of the respective support shafts 8 toward the inside of the body, and the drive arms 12 are pivotally connected to each other via connecting rods 13. A hydraulic cylinder 14 (an example of a drive mechanism) is interposed between the one drive arm 12 and the machine body frame 5. In this way, the hydraulic cylinder 1
By driving 4, the rocking arms 9 and 9 are rocked, and the machine body frame 5 and the track frame 6 move relative to each other while maintaining a parallel posture.

As shown in FIG. 4, the pivot portion of each grounding wheel 3 has a bearing member 15 formed by bending a plate material in an arc shape on the lower surface side of the track frame 6 by welding, and
The bearing bracket 16 is fixed to the bearing member 15 from the lower side by bolts to support the wheel support shaft so that the grounding wheel 3 can be easily attached and detached.

Further, on the outer surface of each of the swing arms 9,
Auxiliary arms 18, which project below the ground contact portion 17 of the crawler belt 4 as the swing arms 9, 9 swing downward.
18 is detachably connected to the bolt. That is, as shown in FIG. 3, when performing maintenance work such as replacement of the crawler belt 4 and replacement of the grounding roller 3, the hydraulic cylinder 14 is driven while the auxiliary arms 18 and 18 are attached. By projecting the arms 18, 18 below the grounding portion 17 of the crawler belt 4, the auxiliary arms 18,
18 makes contact with the ground to levitate the aircraft, and the entire crawler belt 4
As the body floats above the ground, maintenance work can be performed easily. Incidentally, the auxiliary arms 18 and 18 are detached before cutting and traveling in the field.

[0011] In the claims, reference numerals are provided to facilitate comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler traveling device.

FIG. 2 is a plan view of a crawler traveling device.

FIG. 3 is a perspective view of an auxiliary arm.

FIG. 4 is a cross-sectional view of a wheel support portion.

[Explanation of symbols]

 4 Crawler belt 5 Airframe frame 6 Track frame 9,9 Swing arm 14 Drive mechanism 17 Grounding part 18,18 Auxiliary arm

Claims (1)

(57) [Claims] 1. A pair of front and rear swing arms (9) and (9) are pivotally supported on a body frame (5), and a track frame (9) is attached to a swing end of each swing arm (9) and (9). 6) pivotally connecting the two swinging arms (9), a crawler traveling apparatus is provided with a driving mechanism for driving the swing (14) relative to (9) a body frame (5), wherein A pair of front and rear swing arms (9) and (9) are projected below the grounding portion (17) of the crawler belt (4) as the swing arms (9) and (9) swing downward. A crawler traveling device in which auxiliary arms (18) and (18) for detachable connection are detachably connected.