JPH07300085A - Crawler traveling device - Google Patents

Abstract

PURPOSE:To provide a crawler traveling device which can restrain mud or the like from clogging during traveling on a paddy field. CONSTITUTION:A movable fame 7 which carries a plurality of ground contact wheels 3 for causing a crawler belt to tread and to be guided, and a body side stationary frame 5 are arranged so as to be moved up and down by a drive mechanism 12, relative to each other, and a carrier roller 13 for supporting a slack-down part of the crawler belt 4 is attached to the stationary frame 5 so as to be vertically movable. Further, the carrier roller 13 is elevated, relative to the stationary frame 5 by coupling means C in association with the vertical movement of the movable frame 7 relative to the stationary frame 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a movable frame for supporting a plurality of grounding wheels for guiding a crawler belt to the ground and a machine-side fixed frame can be operated to move up and down relatively by a drive mechanism.

[0002]

2. Description of the Related Art In the above crawler traveling device, a carrier roller is provided to support the descent of the crawler belt. Conventionally, this carrier roller is provided.
A structure fixed to the upper part of the machine-side fixed frame and a structure fixed to the upper part of the movable frame are known.

[0003]

The crawler traveling device described above is used, for example, as a traveling device of a combine equipped with a threshing device, and when moving on rough terrain, one of the pair of left and right movable frames is fixed to the machine-side fixed frame. It is possible to maintain the level of the threshing device by lowering it relative to each other, but not only that, but also by utilizing the elevating structure of the movable frame, both movable frames can be operated together when traveling in the wetland. By lowering it relative to the fixed frame on the machine side, the entire machine body is raised relatively, and even if the crawler traveling device part sinks into the wetland, a constant cutting height is maintained without changing the attitude of the cutting part. It also makes it possible to maintain. However, in such a usage form, a large amount of mud, straw dust, and weeds are attached to the crawler belt, and they are lifted upward as the crawler belt moves. In the conventional crawler traveling device, the carrier roller is fixed to the machine-side fixed frame, or is fixed to the movable frame and is configured to descend together.Therefore, the carrier roller receives and supports the crawler belt on the return path. Whether it is always constant regardless of the relative elevation of the movable frame between the fixed frame on the machine side,
Alternatively, the movable frame becomes narrower as it moves down relatively. Therefore, mud or the like that is lifted as the crawler belt moves is easily clogged with the fuselage-side fixed frame, which may increase the driving load or, in extreme cases, cause the crawler belt to come off. There was also.
In view of the above situation, the present invention provides a crawler traveling device capable of moving up and down relative to a movable frame and a machine-side fixed frame. It is to be able to avoid clogging.

[0004]

In order to solve the above-mentioned problems, the crawler traveling device according to the present invention is characterized in that a movable frame for supporting a plurality of ground rollers for guiding the crawler belt to the ground and a fixed frame on the machine body side. Is configured to be movable up and down relatively by a drive mechanism, and a carrier roller for supporting the descent of the crawler belt is vertically movably attached to the machine-side fixed frame, and the movable frame is fixed to the machine-side fixed frame. There is provided a connecting means for raising the carrier roller relative to the machine body side fixed frame in association with the relative lowering.

[0005]

In other words, since the movable frame is lowered relative to the machine-side fixed frame, the carrier roller attached to the machine-side fixed frame is relatively lifted by the connecting means. In the relative descending state of the frame, the space between the crawler belt on the return path, which is received and supported by the carrier roller, and the machine-side fixed frame is greatly expanded. Therefore, even if the crawler belt lifts straw debris or weeds along with the movement of the movable frame relative to the fixed frame on the machine side when traveling through the wetlands, Since the space is widened, clogging can be reduced.

[0006]

As a result, the carrier roller is lifted in conjunction with the relative lowering of the movable frame with respect to the machine-side fixed frame performed by the crawler traveling device of this kind during traveling in a wetland, and the space between the crawler belt and the machine-side fixed frame is widened. By reducing the clogging of mud and the like, it is possible to reduce the increase in load and the risk of derailment caused by the clogging, and it is possible to provide a crawler traveling device having more excellent wetland traveling performance.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a combine crawler traveling device. This crawler traveling device includes a drive sprocket 1 at the front end of the machine body, a tension wheel 2 at the rear end of the machine body, a plurality of grounding wheels 3 arranged in parallel between the two, and windings around each of them. The endless crawler belt 4 is configured so that power is transmitted from the machine body side to the drive sprocket 1 and the crawler belt 4 is rotationally driven to travel.
The drive sprocket 1 is supported by a fixed portion on the machine side, and the tension wheel 2 and the grounding wheel 3 are both a pair of front and rear swing links 6a, 6 with respect to a fixed frame 5 on the machine side.
It is supported by a movable frame 7 which is connected via a b in a quadruple-link manner so as to be able to move up and down relatively. Of which, the tension wheel 2
Is supported by a slide frame 9 provided on the upper end of the rear end of the movable frame 7 by a screw feed mechanism 8 so as to be positionally fixed in the front-rear direction. Further, among the plurality of grounding rollers 3, a grounding roller 3a located substantially in the front-rear center is attached to the movable frame 7 via a swinging arm 10 which is urged downward so as to be movable up and down. This grounding roller 3 when driving
The impact can be reduced by increasing a relative to the movable frame 7 along the corner.

Then, a hydraulic cylinder 12 which is an example of a drive mechanism for moving up and down the movable frame 7 which supports each grounding wheel 3 relative to the machine-side fixed frame 5.
Is provided. By moving the movable frame 7 relative to the machine-side fixed frame 5 by the extension drive of the hydraulic cylinder 12, either the left or right movable frame 7 is moved.
To allow the onboard threshing device to be maintained horizontally when traveling on uneven terrain with different left and right heights, and also to act on both the left and right movable frames 7 in the same manner, which tends to cause the sinking of the airframe. It is configured so that the cutting height can be maintained constant without changing the attitude of the cutting blade in the cutting unit during traveling in the wetland.

On the other hand, on the upper part of the fixed frame 5 on the body side,
Carrier roller 1 that supports the descent of the crawler belt 4.
3 is provided. The mounting configuration of the carrier roller 13 will be described in detail. The carrier roller 13 is pivotally supported at one end on the upper side of a swing arm 14 which is mounted on the fixed frame 5 so as to be rotatable about a lateral axis X, and the swing arm is also provided. The other end of 14 is extended into a bifurcated shape, and is engaged with a locking pin 15 planted in the movable frame 7. Then, from the state of (a) in FIG. 1, in conjunction with the movable frame 7 descending relative to the fixed frame 5, the swing arm 14 which is an example of the connecting means C rotates clockwise in the figure. As a result, the carrier roller 13 rises relative to the fixed frame 5 and shifts to the state of FIG. 1B, and the movable frame 7 rises relative to the fixed frame 5 from that state. In conjunction with this, the swing arm 14 is rotated counterclockwise in the figure, and the carrier roller 13 is lowered relative to the fixed frame 5 to return to the state of (a) in FIG. .

That is, as described above, both movable frames 7 are similarly lowered relative to the fixed frame 5 during traveling in the wetland so that the body height can be kept constant. By raising the carrier roller 13 relative to the fixed frame 5, the crawler belt 4
The distance between the fixed frame 5 and the fixed frame 5 is widened to prevent clogging of mud, straw debris, weeds, etc., which are lifted from the wetland with the movement of the crawler belt 4. Incidentally, as the movable frame 7 rises relative to the fixed frame 5 and returns to its original state, the carrier roller 13 is also lowered relative to the fixed arm 5 by the swing arm 14, and the original state is restored. It is configured to return to the state.

As shown in FIG. 2, the mission case 21
Left and right axles 22A, 22B and axle case 23 with respect to
In the mounting structure of A, 23B, those axles 22A, 2
The bosses of the separate input gears 24A, 24B for 2B are fitted onto the axles 22A, 22B by fitting, and are internally fitted and held by the bearings 25A, 25B attached to the transmission case 21. Spacers 26, whose both ends are fitted in, are interposed in the boss portion of the. That is, the left and right axles 22A and 22B are attached to the mission case 2
Even if it is removed from 1, the respective input gears 24A, 24B are supported at both ends by the bearings 25A, 25B and the spacer 26, so that the shafts 22A, 22B and the axle case 23A to the mission case 21 at the time of assembly, 23B can be retrofitted and one or both axles 22A, 22B can be installed without dismantling the gear mechanism during maintenance.
Only the axle cases 23A and 23B can be removed from the mission case 21.

[Other Embodiment] The structure of the connecting means C for raising and lowering the carrier roller 13 by interlocking the movable frame 7 with the relative movement of the fixed frame 5 relative to the fixed frame 5 can be appropriately changed, and in the previous embodiment. Instead of using the swing arm 14 whose one end engages with the pin 15 that is planted on the movable frame 7 described above, for example, the movable frame 7 and the carrier roller 13 are pivotally supported at the upper and lower ends of the pantograph, respectively. Such a configuration may be adopted.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

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

FIG. 2 is a partial sectional view of a mission case.

[Explanation of symbols]

 3 Grounding roller 4 Crawler belt 5 Fixed frame on machine side 7 Movable frame 12 Drive mechanism 13 Carrier roller C Connection means

Claims (1)

[Claims] 1. A relative elevating operation of a movable frame (7) supporting a plurality of ground rollers (3) for guiding a crawler belt (4) to the ground and a machine-side fixed frame (5) by a drive mechanism (12). In a crawler traveling device that is freely configured, a carrier roller (13) that supports the descent of the crawler belt (4) is attached to the machine-side fixed frame (5) so as to be vertically movable, and the movable frame is The carrier roller (13) is interlocked with the relative lowering of (7) with respect to the machine-side fixed frame (5).
A crawler traveling device provided with a connecting means (C) for relatively raising the vehicle relative to the machine-side fixed frame (5).