JPH0615765Y2 - Crawler traveling device for mobile agricultural machinery - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a crawler traveling device for a mobile agricultural machine, which is a combine truck, and more specifically, to a movable track having a plurality of grounding wheel groups for guiding a crawler belt to the ground. A crawler traveling device for a mobile agricultural machine in which a frame and a fixed track frame fixed to the machine body are pivotally connected via a pair of front and rear swing links, and the ground portion of the crawler belt is movable up and down relative to the machine body. Regarding

[Conventional technology]

As a conventional crawler traveling device, as disclosed in, for example, Japanese Patent Laid-Open No. 63-14927, a fixed track frame and a movable track frame are arranged in a state of being displaced from each other in a plan view, and are rocked back and forth. There has been a structure in which a link is provided in the middle of both track frames, and the upper limit of the movable track frame is regulated by a pivot shaft of a swinging link extending laterally.

[Problems to be solved by the invention]

The conventional structure described above is designed so that the entire front-rear direction of the ground contact portion of the crawler belt can be efficiently moved up and down without changing the winding circumference of the belt. In the event of an emergency in the event of leakage, the movable track frame may rise relative to the fixed track frame due to the weight of the aircraft, and the entire weight may suddenly be applied to the long and cantilevered pivot shaft. However, there is a drawback in that the shaft support must be made thicker than necessary to maintain its strength.

In addition, since the movable track frame has a structure in which the upper limit is regulated only through the cushioning rubber, the level of the ground contact portion of the left and right crawler traveling devices at the uppermost position of the movable frame due to dimensional error or the like is caused when traveling on normal roads. If there was a difference, the position could not be adjusted and there was room for improvement.

An object of the present invention is to eliminate the above-mentioned problems.

[Means for Solving the Problems]

A feature of the present invention is that, in the crawler traveling device for a mobile agricultural machine having the structure described above, the movable track frame and the both swing links are arranged so as to overlap each other in plan view, and the fixed track frame and the swing link are provided. The contact adjustment mechanism that adjusts the distance between the contact surface and the upper surface of the movable track frame by changing the distance between the contact surface and the upper surface of the movable track frame. Is provided on the movable track frame, and its action and effect are as follows.

[Action]

(B) With the above characteristic configuration, when the movable track frame is at the uppermost position with respect to the fixed track frame, the machine load is received and supported by the connecting boss portion,
It is not necessary to cantileverly extend the pivot shaft outwardly from the pivot portion, and the cantilever moment in the pivot cantilever portion from the fixed track frame to the connecting boss portion can be made small.

(B) With the above characteristic construction, the contact adjustment mechanism can change and adjust the body level of the movable track frame when the movable track frame is at the uppermost position.

[Effect of device]

Therefore, due to the above action (a), the cantilever moment in the swing link pivotally supporting portion can be made small, so that sufficient supporting strength can be maintained even if the structure is simplified. Further, since the swing link is located above the movable track frame, the swing link can smoothly run without obstructing the flow of muddy water.

Further, due to the above action (b), even if the relative positions of the ground contact portions of the left and right crawler traveling devices with respect to the machine body are different due to the assembly dimension error, the position can be adjusted to the same level. As a result, driving safety is improved.

〔Example〕

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

1 and 2 show a combine crawler traveling device (1) which is an example of a mobile agricultural machine according to the present invention. This crawler traveling device (1) is equipped with a front crawler drive wheel.
(2), rear crawler tension wheel (3), and both wheels (2),
(3) Multiple ground wheels arranged in parallel along the front-rear direction
A rubber crawler belt (5) is wound around and stretched over each of the groups (4).

The driving wheel body (2) is pivotally supported at the front end of a fixed track frame (6) fixed to a combine machine body (not shown), and power is supplied from the machine body side to a crawler belt.
(5) is configured to be rotationally driven, and the tension wheel body (3) and the plurality of grounded wheel (4) groups other than the drive wheel body (2) are respectively arranged relative to the airframe. It is pivotally supported on a movable track frame (7) which can be vertically moved.

Fig. 6 shows the structure of the pivotal support of the grounding wheel (4). This grounding wheel (4) is of the outer wheel type that engages from the outside of the cored bar protrusions (8), (8) protruding from the crawler belt (5), and its support shaft (9) is movable. Bearing boss fixed to the track frame (7)
Bearings are supported in (10). Then, the engaging ring (1
An oil seal (12) is interposed between the (1) and the bearing boss (10), and the outer side of the annular core metal member (13) outside the oil seal (12) is bent to form a boss ( The clearance between 10) and the wheel (11) is reduced to prevent the intrusion of muddy water.

The movable track frame (7) is a pair of front and rear swing links.
(14), (14) via a pivotal connection to the fixed track frame (6) to form a four-link structure, by moving the movable track frame (7) up and down, the crawler belt (5) The entire front and rear of the ground contact part (5a) can be moved up and down relative to the aircraft while maintaining the horizontal state, and the height of the ground contact part (5a) of the left and right crawler traveling devices can be adjusted according to the unevenness of the ground. It is configured so that it can be moved up and down to maintain the aircraft in a horizontal posture at all times.

More specifically, as shown in FIGS. 3 and 4, the pivot shafts (15), () for pivotally connecting both the swing links (14), (14) and the fixed track frame (6). 15), fixed track frame
Fitted in the bearing bosses (16), (16) fixed to (6), the swing links are respectively attached to the frame outer side ends of the pivots (15), (15).
(14) and (14) are attached so as to be integrally rotatable, and the drive arms (17) and (17) are erected and fixed on the inner side of the frame so as to be integrally rotatable. ) Is linked to the hydraulic cylinder (18).

On the other hand, the other ends of the both swing links (14), (14) are connected to the bearing brackets (19), (19) that are vertically fixed on the upper surface of the movable track frame (7) by connecting pins (20), (20). ) Is connected by a pivot.

Then, the movable track frame (7) and both swing links
(14) and (14) are arranged so as to overlap each other in a plan view, and contact with the connecting pivot boss (21) between the fixed track frame (6) and the swing links (14) and (14). Then movable track frame
It is configured to restrict the relative upward movement of (7).
Also, as shown in FIG. 5, the distance between the contact surface (22) to the pivot boss (21) and the upper surface (7a) of the movable track frame (7) is on the upper surface of the movable track frame (7). Height adjustment bolts (23), (23) as adjustable contact adjustment mechanism
Have been deployed. The height adjusting bolt (23) is screwed in the female screw member (24) fixed to the movable track frame (7) along the vertical direction, and is advanced or retracted to move the upper contact surface (23a). ) Is movable relative to the movable track frame (7).

With this configuration, it is possible to adjust the height of the crawler belt ground contact portion (5a) with respect to the machine body.

[Another embodiment]

The contact adjusting mechanism may be configured so that the height can be adjusted by a removable pin.

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

[Brief description of drawings]

The drawings show an embodiment of a crawler traveling device for a mobile agricultural machine according to the present invention. FIGS. 1 and 2 are side views, FIG. 3 is a plan view, and FIG. 4 is a vertical sectional front view of a main part, FIG. Is a side view of a main part, and FIG. 6 is a partial cross-sectional view of a grounding roller. (4) …… Grounding wheel, (5) …… Crawler belt, (5a) …… Grounding portion, (6) …… Fixed track frame, (7) …… Movable track frame, (7a) …… Top surface, (14), (14) …… Swing link, (21) …… Pivot boss, (22) …… Abutment surface, (23) …… Abutment adjustment mechanism.

Claims (1)

[Scope of utility model registration request] 1. A movable track frame (7) pivotally supporting a plurality of grounding wheels (4) for guiding a crawler belt (5) to the ground,
The fixed track frame (6) fixed to the machine body is pivotally connected via a pair of front and rear swing links (14), (14), and the grounding part (5a) of the crawler belt (5) is connected to the machine body. A crawler traveling device for a mobile agricultural machine configured to be capable of relative vertical movement, wherein the movable track frame (7) and the both swing links (14), (1
4) and the movable track frame (7) are arranged in a state of overlapping with each other in a plan view, and abut on the connecting pivot boss portion (21) of the fixed track frame (6) and the swing link (14). Of the movable track frame (7) while restricting the relative upward movement of the movable track frame (7) by changing the distance between the contact surface (22) and the upper surface (7a) of the movable track frame (7). A crawler traveling device for mobile agricultural machinery.