JP2584583Y2 - 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 mounted on an agricultural working machine such as a combine harvester or an earth working machine such as a backhoe.

[0002]

2. Description of the Related Art Conventionally, as a crawler traveling device of this type, for example, as disclosed in Japanese Utility Model Laid-Open Publication No. 2-135382, a pair of rolling wheels of a group of grounded rolling wheels in a crawler traveling device is provided with a track frame. For example, in the case of climbing over a ridge or the like, the aircraft body is not tilted greatly, and one of the rollers loosens the crawler belt. However, it is known that the other rolling wheel tensions the crawler belt even if it swings, but the rolling wheel swings so that the rolling wheel does not come off the crawler belt.

[0003]

However, in the above-mentioned conventional structure, the crawler belt is lowered by the rolling wheel of the balance type which is swung downward when crossing a ridge or the like. It is stretched downward,
If the wheel is the one in front of the traveling direction,
In the case of a fixed contact wheel located in front of the wheel
The crawler belt is moved rearward and downward.
When the front wheel in the traveling direction moves downward in this way, the
Follow the roller belt away from its fixed ground wheel
Move, between the fixed ground wheel and the balance wheel,
There is a possibility that the belt may be loosened. Because of this,
To the crawler belt along the ridge
When a lateral external force is applied,
There was a disadvantage that the belt was easily detached. The present invention has been made in view of the above circumstances, and the crawler belt is disengaged from rolling wheels etc. while suppressing a large change in attitude of the aircraft when crossing a row or loading / unloading the aircraft on a truck or the like. It is intended to provide a crawler traveling device that is difficult.

[0004]

In order to achieve the above object, a crawler traveling device according to the present invention is provided with rolling wheels at both swing ends of a swing arm pivotally supported on a track frame so as to freely swing. A support member for engaging the crawler belt on the inner peripheral surface of the crawler belt between left and right core projections to prevent the rolling wheel from coming off from the crawler belt. The free end of the derailment preventing member is supported by the swing arm so as to be able to follow the swing of the swing arm by pivotally supporting the track frame at a position separated from the swing end. It has a characteristic configuration. The operation and effect of this characteristic configuration are as follows.

[0005]

In other words, the derailing prevention member is pivotally supported at a position separated from the swinging end of the swing arm so that the free end of the derailing prevention member can follow the swinging of the swinging arm. Since it is supported by the swing arm, when the rolling wheel that has swung downward when crossing a ridge or the like is in front of the traveling direction, it is prevented from falling off even near the fixed grounding wheel in front of the rolling wheel. When the member swings downward, the crawler belt is stretched by the derailing prevention member, and the derailing prevention member works so as to eliminate the slack of the crawler belt. Therefore, at this time, even if a lateral external force acts on the crawler belt, it is possible to prevent the core metal of the crawler belt from coming into contact with the derailment preventing member in the lateral direction and to be separated.
The swing arm also maintains the stopping member's posture to prevent derailing.
This also makes it difficult for the derailment prevention member to come off.
ing.

[0006]

[Effect of the Invention] Accordingly, by adopting a simple structure in which the derailing prevention member is supported by the free end of the swing arm that supports the rolling wheel in a weighing manner and is swung, it is possible to avoid over ridges and the like. Accordingly, it was possible to reliably prevent the crawler belt from coming off.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a crawler traveling device 1 provided in a combine or the like. The crawler traveling device 1 includes a drive sprocket 3 disposed above a front end of a track frame 2 fixedly mounted on the traveling body, a group of grounding wheels 4 # pivotally supported by the track frame 2, and the drive sprocket 3 And a crawler belt 5 made of rubber wound around the rolling wheel 4 # group.

As shown in FIG. 1, the group of wheels 4 # is engaged with a pair of core metal projections 6 # protruding from the inner surface of the crawler belt 5 at predetermined intervals in the inner circumferential direction of the belt. The crawler belt 5 is prevented from coming off. The first rolling wheel 4a disposed at the foremost position in the rolling wheel 4 # group is pivotally attached to the front end of the track frame 2 in a fixed position, and is disposed at the rearmost position. A certain second
The rolling wheel 4b is installed so as to be able to function as a tensioning wheel for adjusting the tension of the crawler belt 5 by being pivotally attached to a movable member 7 which is inserted and held in the track frame 2 so as to be able to move back and forth. In the group of rolling wheels 4 #, a third rolling wheel 4c and a fourth rolling wheel 4d are arranged between the first rolling wheel 4a and the second rolling wheel 4b. Wheel 4c and fourth wheel 4
“d” is provided to be pivotally attached to the front and rear free ends of a swing arm 8 that is swingably attached to the track frame 2 around the horizontal axis P.

Furthermore, the first wheel 4a of the track frame 2
A first sled body 9 as a derailing preventing member is pivotally mounted at a rear position near the pivot point of the first pivotable member so as to be swingable around the horizontal axis Q.
Second wheel 4b and fourth wheel 4 in track frame 2
A second sled body 10 as a derailing prevention member is pivotally mounted at an intermediate position between the first sled body and the horizontal sled center R so as to be able to swing. These sled bodies 9 and 10 have their sled portions 9a and 10a engaged between the pair of right and left core metal projections 6 #. And this sled part 9
a, 10a are the horizontal axes Q, R pivotally attached to the respective sled bodies 9, 10;
The first sled body 9 has a part extending forward and a part thereof extending forward, and in particular, partially overlaps with the first wheel 4a in side view. It is arranged to be. Further, the end of the portion of the first sled body 9 extending rearward of the sled portion 9a and the end of the second sled body 10 extending forward of the sled portion 10a are shown in FIG. In addition, U-shaped brackets 9b and 10b are provided so as to vertically support the support shaft 11 of the third wheel 4c and the support shaft 12 of the fourth wheel 4d.

With the above configuration, for example, when going over a ridge or the like, when the front and rear intermediate portions of the crawler traveling device 1 ride on the ridge, the third rolling wheel 4c swings upward around the horizontal axis P and the As a result, the first sled body 9 also swings around the horizontal axis Q via the bracket 9b.
d swings downward around the horizontal axis P, and accordingly, the second sled body 10 also swings around the horizontal axis R via the bracket 19b, and acts to project the crawler belt 5 downward. . Further, when the crawler traveling device 1 advances, this time,
The fourth wheel 4d swings upward around the horizontal axis P, while the third wheel 4c swings downward around the horizontal axis P, and the first sled body 9 also moves the bracket 9b. Therefore, the sled portion 9a of the first sled body 9 acts so as to project the crawler belt 5 downward. FIG. 2 is a principle diagram showing the postures of the sled bodies 9 and 10 when traveling on a flat ground and the postures when traveling on an uneven traveling ground.

Next, another embodiment will be described. Note that the same reference numerals are given to the same structures as those in the above embodiment. As shown in FIG. 3, a first sled 14 is attached to a support shaft 13 of the first wheel 4a.
Of the support shaft 13 around the axis of the support shaft 13
The first sled body 14 is provided so as to be slidable and rotatable with respect to the third sled 3, and a U-shaped bracket 14b connected to the rear of the sled portion 14a of the first sled body 14 is connected to the third rolling wheel 4c. Is provided so as to be held vertically by the support shaft 11. On the other hand, the arm member 17 connected to the second sled body 16 is attached to the support shaft 15 of the second wheel 4b.
Of the support shaft 15 around the axis of the support shaft 15
The arm member 17 and thus the second sled body 16 are slidably and rotatably provided with respect to 5, and a U-shaped bracket 16b, which is provided in front of a sled portion 16a of the second sled body 16, is provided. 4th
It is provided so as to be vertically clamped by the support shaft 12 of the rolling wheel 4d. With this configuration, the first sled body 14 and the second sled body 16 that swing up and down with the vertical swing of the third rolling wheel 4c and the fourth rolling wheel 4d by the swing arm 8 are respectively the first rolling wheel. 4a spindle 1
The third shaft 4 and the shaft 15 of the second wheel 4b swing around the shaft.

Next, another embodiment will be described.
Note that the same reference numerals are given to the same structures as those in the above embodiment. As shown in FIG. 4, a holding portion between a U-shaped bracket 9 b at the rear end of the first sled body 9 and a U-shaped bracket 10 b at the front end of the second sled body 10. The shaft 11 of the third wheel 4c and the fourth wheel 4d
In place of the support shaft 12, the upper and lower support arms 18, 19 provided on the swing arm 8 are vertically clamped.

In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view (a) and a cross-sectional plan view (b) showing a crawler traveling device of a first embodiment.

FIG. 2 is a side view showing a principle structure of the crawler traveling device in a flat-land running state, and a side view showing a principle structure of the crawler traveling device in a state traveling on an uneven traveling ground;

FIG. 3 is a longitudinal side view showing a crawler traveling device according to a second embodiment.

FIG. 4 is a cross-sectional plan view showing a crawler traveling device according to a third embodiment.

[Explanation of symbols]

 2 Track frame 4c, 4d Roller wheel 5 Crawler belt 6 Core bar projection 8 Swing arm 9, 10 Wheel release prevention member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model 60-91584 (JP, U) Japanese Utility Model 4-65687 (JP, U) Japanese Utility Model 5-5682 (JP, U) Japanese Utility Model 2- 78482 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) B62D 55/08 B62D 55/14

Claims (1)

(57) [Scope of request for utility model registration] 1. Rollers (4c) and (4d) are supported on both swing ends of a swing arm (8) pivotally supported on a balance with respect to a track frame (2), and a crawler belt (4) is provided. 5) Core projections (6) projecting left and right on the inner peripheral surface,
(6) The derailment preventing members (9) and (10) which intervene between the rollers (4c) and (4d) to prevent the rollers (4c) and (4d) from coming off from the crawler belt (5) are attached to the swing arm ( 8) pivotally supported by the track frame (2) at a position separated from the swinging end of the track frame (2) to prevent the derailing members (9) and (10).
A crawler traveling device, wherein the free end of the crawler is supported by the swing arm (8) so as to follow the swing of the swing arm (8).