JPH09188278A - Crawler for mobile agricultural machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a crawler from running off from a roller when the crawler crosses over a levee by arranging a front slider and a rear slider, which are brought into slide contact with the crawler between inside parts of guiding projections on the left side and on the right side, and arranging an inner track idler roller type oscillatory roller, which is brought into rolling contact with the crawler in the inside part of the left guiding projection and the right guiding projection and elastically bounds downward. SOLUTION: A crawler 2 is guided by means of respective track idler rollers 4, 5, 8, 14, 15 and the like while guided by means of a front slider 6 and a rear slider 7. In the front half part and the rear half part of a periphery of a crawler 2 landing part, a projection array of guiding projections are guided so as to run the crawler 2 while being put between the front slider 6, the rear slider 7, an oscillatory idler roller 8, and outer track idler roller type front and rear fixed track idler roller 4, 5. When the crawler 2 treads on a locally protruding ground such as a levee, the oscillatory idler roller 8 pressing a longitudinal intermediate part of the crawler 2 is pushed up, so that the crawler 2 is curved upward. Subsequently, tensile pressure in the front part and the rear part of the crawler 2 is increased, and sufficient tensile pressure toward the respective track idler rollers 4, 5 is maintained, and as a result, the crawler 2 hardly comes off from the rollers.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a crawler for a mobile agricultural machine such as a combine harvester.

[0002]

BACKGROUND OF THE INVENTION It is an object of the present invention to prevent the wheel of a crawler from slipping off when the crawler traveling device travels over the ridge.

[0003]

According to the present invention, there is provided a crawler frame 3 in which a grounding wheel is arranged to bridge a crawler 2 in which a pair of left and right guide protrusions 1 are arranged along a central peripheral surface of the crawler width. In the form of an outer wheel rolling on the outer side of the left and right guide protrusions 1, a front fixed roller 4 in the front half and a rear fixed roller 5 in the rear half are provided, and the inner side of these left and right guide protrusions 1 Before and after sliding contact between the parts, rear sliders 6 and 7 are provided, and between the front and rear fixed roller wheels 4 and 5, elastically downwards in the form of an inner wheel rolling contact with the inner part of the left and right guide protrusion 1. Rocking roller 8
It is configured as a crawler of a mobile agricultural machine provided with.

[0004]

In the driving rotation of the crawler 2, in the rolling contact guide by the grounding roller on the lower side, the front fixed roller 4 rolling on the outer side of the left and right guide protrusions 1 protruding on the inner circumferential surface of the rotation.
And a rear fixed wheel 5 and a front slider 6 and a rear slider 7 that are in sliding contact with the inner side of the left and right guide protrusions 1. Therefore, the crawler 2
In the front half and the rear half, the front fixed roller 4 and the front slider 6 support and guide the inner and outer sides of the guide protrusion 1, and the rear fixed roller 5 and the rear slider 7 similarly support and guide. Therefore, even if the crawler 2 tilts to the left and right, it is difficult to come off and stable ground support can be maintained.

Moreover, the front fixed rollers 4 are
Also, since the crawler 2 portion between the front slider 6 and the rear fixed roller 5 and the rear slider 7 is extended downward by the rocking roller 8, the crawler 2 is as in the case of a ridge. When riding over a locally protruding portion, this rocking roller 8
Is bent upward so as to be clamped between the ground contact protrusion and the rocking roller 8, and the rocking roller 8 is placed inside the left and right guide protrusions 1 of the crawler 2. Since the crawler 2 is in rolling contact, the lateral movement of the crawler 2 is small, and the upper and lower flaps of the crawler 2 are eliminated so that the front half and the rear half of the crawler 2 are always fixed to the crawler 2 by the fixed rollers 4, 5 facing each other. It is possible to maintain a constant rolling contact pressure and perform smooth running without crawler disengagement.

[0006]

[Example] The crawlers 2 implemented by a combine are provided in a pair of left and right. The crawler frame 3 is provided below the vertical frame 9 constituting the vehicle body with the bracket 10 interposed therebetween, and the crawler 2 can be laid over the grounding wheels arranged along the outside of the crawler frame 3 to drive and drive. A chassis 11 is provided on the upper side of the vertical frame 9, a reaper is supported, a threshing device and a Glen tank are mounted, an engine and a mission case are attached, and a control stand and a cockpit are arranged.

Drive sprockets 12 are axially mounted on both left and right sides of a transmission case mounted on a bracket 10 at the front part of the vertical frame 9, the front ends of the left and right crawlers 2 are bridged, and the sprocket 12 is driven to drive the crawlers 2. Can be driven. The crawler 2 with which the sprocket 12 can be meshed is mainly made of rubber, and a pair of left and right guide protrusions 1 are arranged at regular intervals for each core metal 13 at the center of the crawler width. A meshing hole for meshing the sprocket 12 is formed in the space between the front and rear core bars 13 corresponding to the inside.

The front end of the crawler 2 is the sprocket 1
2 and the rear end can be moved back and forth.
The grounding rollers on the lower side are the front fixed rollers 4 and the rear fixed rollers 5 on the front half, and the rocking rollers 8 between them, and the receiving wheels 15 are on the upper side. I am trying to hand over each. Of these rollers, the front fixed roller 4 and the rear fixed roller 5 are in the form of rolling wheels in which the inner peripheral surface of the crawler 2 located on the outer side of the left and right guide protrusions 1 is in rolling contact with other rolling rollers. The wheel 8, the adjusting wheel 14, and the receiving wheel 15 are the sprocket 1
As in the case of No. 2, the inner wheel is located between the left and right guide protrusions 1.

The front slider 6 and the rear slider 7 are provided at the positions where these front and rear fixed rollers 4 and 5 are arranged, and are slidably guided between the left and right guide protrusions 1. The front slider 6 has a front end portion formed into a warp shape and is curved toward the sprocket 12 side of the front upper portion. The rear slider 7 is constructed so that it can be further separated into a front slider 7A and a rear slider 7B. The front slider 7A positions the front edge 16 slightly forward of the front edge of the rear fixed roller 5 at the foremost end. The slanted edge is slanted. These front and rear sliders 7
A and 7B can be connected by connecting the front and rear joint end surfaces 17 and 18 in the form of sockets by fitting concave and convex portions from the front and rear, and the arm portion 2 to the bracket 19 integrated with the crawler frame 3.
It is possible to superimpose 0 part, insert a bolt 21 into the superposed part, and tighten and fix it with a nut 22. The attachment of the front slider 6 is similar.

The rocking roller 8 has a roller arm 23 axially rotatably supported by a crawler frame 3 so as to be vertically rotatable, and is pressed down by a spring to be rotatable around the tip of the roller arm 23. It is provided in. The interval between the front fixed roller 4 and the rear fixed roller 5 is formed to be wide, and is set as an interval adapted to the arrangement of the oscillating roller 8. Crawler 2 rotated by rotation of the drive sprocket 12
Is guided by the rollers 4, 5, 8, 14, 15, etc., and is also guided by the front and rear sliders 6, 7. Crawler 2 In front of the ground contact side, in the latter half, guide protrusion 1
Of the front and rear sliders 6, 7 and the swing roller 8
And is guided while being sandwiched between the front and rear fixed wheels 4 and 5 in the outer wheel form.

In a place where the traveling ground is relatively flat, the rollers 4 and 5 and the sliders 6 and 7 are supported and guided in a plane, but the crawler 2 steps on a locally protruding ground such as a ridge C. In this case, the rocking roller 8 that presses the front-rear intermediate portion of the crawler 2 is pushed up to bend the crawler 2 upward, increasing the tension of the front-rear portion of the crawler 2,
The tension on each of the wheels 4, 5 etc. is maintained sufficiently to make it difficult to remove the wheels. Further, at this time, the swing roller 8 that presses the space between the left and right guide protrusions 1 from the upper side in the form of an inner wheel by the upward bending of the crawler 2 and the front edge 16 of the rear slider 7 that follows.
The rear fixed roller 5 in the form of an outer wheel while being guided by
Since the crawler 2 is guided to the side, the lateral deviation of the crawler 2 and the rattling due to the inclination can be reduced and the derailment can be eliminated.

Since the rear slider 7 can be separated into a front slider 7A and a rear slider 7B, the rear slider 7 can be economically produced by molding and can be commonly used.
3 and 4, the point different from the above example is that the crawler frame 3 is moved up and down with respect to the vertical frame 9 of the vehicle body by hydraulic expansion and contraction of the rolling cylinder 25, so that the chassis 11
Is tilted to the left or right, or the height of the chassis 11 can be changed. The pair of left and right crawler frames 3 having the front fixed roller 4, the rear fixed roller 5, the adjusting roller 14, the receiving wheel 15, the swinging roller 8 and the like rotate vertically as a pair of front and rear parallel link mechanisms. Crawler arms 26 and 27 that are moved
It can be raised and lowered by these crawler arms 26, 2
A rolling cylinder 25 connects the upper end portions of 7 with an operating piston 28, a rod 29, and the like. By extending and contracting the crawler 2 on one side by the expansion and contraction of the rolling cylinder 25 on one of the left and right sides, the chassis 11 can be controlled to the horizontal direction or the inclined posture.
By simultaneously expanding and contracting both the left and right rolling cylinders 25, the vehicle height can be changed up and down in parallel.

The crawler arms 26, 27 are provided with a bearing metal 32, on which an arm shaft 31 is rotatably mounted, attached to a bracket 30 of the vertical frame 9 by tightening bolts 33. When assembling the bearing metal 32 and the crawler arms 26, 27, etc., if the vertical frame 9 is mounted upside down, the assembling work is accurate and easy.

The bearing metal 34 of the receiving wheel 15 is
On the upper surface of the bracket 35 mounted on the crawler frame 3,
It is polymerized and tightened with bolts 36 to fix. At this time, a shim 37 having an appropriate thickness may be sandwiched so as to match the tension of the crawler 2. FIG. 5 shows the mounting structure of the bearing metal 32. On the lower surface of the vertical frame 9, a bracket 30 connected by two front and rear horizontal connecting members 38 and 39 is integrally provided by welding. . On the lower surfaces of the left and right brackets 30, there are provided bolts 40 with bearing metals 32, each of which is mounted with an arm shaft 31 of the crawler arm 27.
Install with.

The front connecting member 38 has a notch 41 for axially mounting a rod 29 for connecting the front and rear crawler arms 26 and 27, and the rod 29 is provided in the notch 41.
The reinforcement cover 42 is attached from below through the bolts 43.

[Brief description of the drawings]

FIG. 1 is a side view of a crawler, a side view showing an operation of a part thereof, and a partly exploded perspective view.

FIG. 2 is a front view.

FIG. 3 is a side view of a crawler showing another embodiment, an exploded perspective view of a part thereof, and a side view.

FIG. 4 is a front view.

FIG. 5 is an enlarged side view, a perspective view, and an exploded perspective view of a part thereof.

[Explanation of symbols]

 1 guide protrusion 2 crawler 3 crawler frame 4 front fixed roller 5 rear fixed roller 6 front slider 7 rear slider 8 swing roller

Claims (1)

[Claims] 1. The left and right guide protrusions 1 are attached to a crawler frame 3 in which a grounding roller is arranged to bridge a crawler 2 in which a pair of left and right guide protrusions 1 are arranged along the center circumferential surface of the crawler width.
In the form of an outer wheel that rolls on the outer side of the vehicle, a front fixed roller 4 in the front half and a rear fixed roller 5 in the rear half are provided,
Front and rear sliders 6 and 7 are provided for sliding contact between the inner portions of the left and right guide protrusions 1, and rolling contact is performed between the front and rear fixed rolling wheels 4 and 5 at the inner portion of the left and right guide protrusions 1. A crawler for a mobile agricultural machine, which is provided with a rocking roller 8 that elastically springs downward in the form of an inner wheel.