JP2004017866A - Rubber crawler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a multi-sheet hooking obstruction by a lug. <P>SOLUTION: A shoulder part 6 gradually descended from a lug top part 4 positioned at a midway part in a width direction of the crawler body to a lug end part is formed on the lug 3 formed on a ground-contact surface 2A of a crawler body 2. A chamfering R is formed at a crossing part of this shoulder part 6 and the lug end part 5 and/or the shoulder part 6 is formed by a two-stage inclined surface. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rubber crawler that can be used for a management machine and the like.
[0002]
[Prior art]
Japanese Patent Application Laid-Open No. 8-80103 discloses a management machine that performs management work such as cultivation of a ridge that grows vegetables such as lettuce and cabbage, weeding, and application of a chemical. A rubber crawler is used as a device for traveling in a furrow valley.
In the rubber crawler, the lug formed on the grounding surface of the crawler main body has a shoulder portion that is gradually lowered from a lug top located at an intermediate portion in the width direction of the crawler main body to a lug end, and this shoulder is a single-stage shoulder. Formed with an inclined surface, the intersection of the shoulder and the lug end is angular, the lug end is at the same position as the end of the crawler body, and the width of the lug top is slightly smaller than the width of the crawler body It has a shape.
[0003]
[Problems to be solved by the invention]
By the way, in the cultivation of vegetables, in order to reduce the intermediate management work as much as possible, moreover, in order to improve the quality of the crop, there is a case where a ridge is covered with a multi-sheet, When using the management device of the prior art, the rubber crawler traveling while stepping on the multi-seat is damaged by hooking the multi-seat of the ridge inclined surface at the shoulder portion of the lug in order to approach the ridge inclined surface on the valley side. Sometimes.
[0004]
An object of the present invention is to provide a rubber crawler capable of solving such a problem of the related art.
SUMMARY OF THE INVENTION An object of the present invention is to provide a rubber crawler capable of reducing a multi-sheet catching obstacle due to a lug.
[0005]
[Means for Solving the Problems]
Next, specific means for solving the problems in the present invention will be described. ,
First, the lug 3 formed on the ground contact surface 2A of the crawler main body 2 has a shoulder portion 6 that is gradually lowered from a lug top 4 located at an intermediate portion in the crawler main body width direction to a lug end 5, and this lug 3 is formed. A chamfer R is formed at the intersection of the shoulder portion 6 and the lug end portion 5, and / or the shoulder portion 6 is formed by two-step inclined surfaces 6a and 6b.
[0006]
Thereby, when the chamfer R is formed at the intersection between the shoulder portion 6 and the lug end portion 5, a multi-sheet catching obstacle, which occurs when the intersection is square, is reduced, and the shoulder portion 6 is formed. Is formed by the two-step inclined surfaces 6a and 6b, the height of the lug end portion 5 on the end surface 2B side of the crawler body 2 becomes lower, and the multi-sheet catching obstacle on the lug end portion 5 side of the lug 3 decreases. I do.
Secondly, the lug 3 formed on the ground contact surface 2A of the crawler main body 2 is formed with a shoulder portion 6 gradually lowering from a lug top 4 located at an intermediate portion in the crawler main body width direction to a lug end 5, and the lug top is formed. 4 is set to be 60% or less of the width of the crawler body 2.
[0007]
As a result, the distance from the ridge inclined surface to the multi-seat stepping position by the lug top 4 of the lug 3 is increased, and the multi-sheet catching obstacle is reduced.
Third, the lug 3 formed on the ground contact surface 2A of the crawler main body 2 is formed with a shoulder portion 6 gradually lowering from a lug top 4 located at an intermediate portion in the crawler main body width direction to a lug end 5, and the lug end is formed. The portion 5 is disposed inward of the width of the end surface 2B of the crawler body 2.
As a result, the lug end 5 on the end surface 2B of the crawler main body 2 is eliminated, and the multi-sheet catching obstruction by the lug end 5 is reduced.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 9 shows a general passenger management machine 11, in which a wheel frame 14 is supported by an axle case 13 protruding left and right from a traveling body 12, and a drive wheel 15 is provided on a drive shaft supported by the axle case 13. A front and rear driven wheel and a plurality of rolling wheels 16 are supported by a wheel frame 14, and a rubber crawler 1 is wound around the driving wheel 15, the front and rear driven wheels and the plurality of rolling wheels 16 to constitute a crawler traveling device 17. The crawler traveling device 17 has a substantially tapered shape in a side view.
[0009]
The riding management machine 11 straddles one or a plurality of ridges 18, the crawler traveling device 17 travels while stepping on a multi-sheet 19 covered with the ridge 18 at a valley 20, and the rubber crawler 1 is a multi-sheet 19 with a ridge inclined surface 18A. Close to.
In the first embodiment shown in FIGS. 1 to 4, the crawler main body 2 of the rubber crawler 1 is formed in an endless band shape using an elastic material such as rubber, and the crawler main body 2 is provided on the ground surface 2A of the crawler main body 2 at equal circumferential intervals. The lugs 3 are integrally formed on the inner peripheral surface 2C, and the projections 7 are integrally formed on the inner peripheral surface 2C at equal intervals in the circumferential direction.
[0010]
A circumferential tensile member may be embedded in the crawler body 2 and a width tensile member (core bar) may be embedded, but is not embedded in this embodiment.
The lug 3 has a single character (straight) shape parallel to the width direction of the crawler main body 2, and its circumferential position substantially corresponds to the protrusion 7.
The protrusion 7 is a ridge that is substantially parallel to the lug 3 and shorter than the lug 3, and is formed so as to be separated into right and left. Between the left and right protrusions 7, there is a rolling track 8 on which the driving wheel 15 and the rolling wheel 16 roll. Has become. Therefore, the projection 7 also serves as a projection for preventing wheel derailment.
[0011]
The drive wheel 15 has an engaging pin 15A projecting from the outer peripheral portion of the rotating disk at an equal interval in the circumferential direction and parallel to the axis. The engaging pin 15A engages with the protrusion 7, The drive wheel 15 drives the rubber track 1 to travel.
The lug 3 of the rubber crawler 1 has a shoulder portion 6 which is gradually lowered from a lug top 4 located at an intermediate portion of the crawler body width direction to a lug end 5. The lug end 5 is located at an extended position of the end face 2B of the crawler body 2, and the intersection of the lug end 5 and the shoulder 6 is not square but has a chamfer R having a relatively large diameter.
[0012]
If the intersection of the lug end portion 5 and the shoulder portion 6 has a square shape, the multi-sheet 19 can be easily hooked. However, if the multi-sheet 19 is formed into a large-diameter chamfer R, the hooking is greatly reduced.
Since the protrusion 7 is located on the inner peripheral side of the crawler main body 2, there is little possibility of contact with the multi-sheet 19, but almost the same as the lug 3, the protrusion 7 and the inclined portion 7B located on the left and right outer sides of the top 7A. A chamfer R having a relatively large diameter is formed at the intersection with the portion 7C.
[0013]
In the second embodiment shown in FIGS. 5 and 6, the rubber crawler 1 of the second embodiment is different from the first embodiment only in the shape of the lug 3.
The lug 3 has a shoulder portion 6 formed of a two-step inclined surface of a first inclined surface 6a and a second inclined surface 6b. The outer end side of the second inclined surface 6b reaches the ground contact surface 2A, and the lug end 5 is Not formed. At the intersection of the first inclined surface 6a and the second inclined surface 6b, a chamfer R having a relatively large diameter is formed.
The outer end side of the second inclined surface 6b reaches the ground contact surface 2A, and the height of the lug end portion 5 on the end surface 2B side of the crawler body 2 is reduced (lost), so that the multi-sheet catching obstacle at the lug end portion 5 is reduced. Do (go away).
[0014]
Such a two-step inclined surface 6a, 6b may be applied to the shoulder portion 6 of the first embodiment described above, and forms a low lug end portion 5 to cut off the intersection with the second inclined surface 6b and chamfer. You may be connected through.
In the third embodiment shown in FIG. 7, the lug 3 of the rubber crawler 1 has a shoulder 6 connected by a substantially flat surface from the outer end of the lug top 4 to the outer end of the ground contact surface 2A with one inclined surface, The lug end 5 becomes an intersection with the ground plane 2A, and the lug end 5 has a shape without a height.
[0015]
The lug top 4 of the lug 3 of the first and second embodiments has a width set to be about 60% of the width of the crawler body 2, whereas the width W of the lug 3 of the third embodiment is 60%. The distance is set smaller, and the distance from the ridge inclined surface 18A to the multi-seat stepping position by the lug top 4 of the lug 3 is increased to reduce the multi-sheet catching obstacle.
In the fourth embodiment shown in FIG. 8, the lug 3 of the rubber crawler 1 has a shoulder 6 connected by a substantially flat surface from the outer end of the lug top 4 to a halfway portion in the width direction of the ground contact surface 2A with one inclined surface. The lug end 5 becomes an intersection with the ground contact surface 2A, the lug end 5 has a shape without height, and the lug end 5 is disposed inward of the width of the end surface 2B of the crawler body 2.
[0016]
As a result, the lug end 5 on the end surface 2B of the crawler main body 2 is eliminated, and the multi-sheet catching obstruction by the lug end 5 is reduced.
Note that the present invention is not limited to the above embodiment, and can be variously modified. For example, the crawler body 2 forms an engagement hole between the lugs 3 and uses a sprocket for the drive wheel 15, makes the lug 3 a lug pattern other than one horizontal character, or shifts the lug 3 and the protrusion 7 in the circumferential direction. Or you may.
Further, the intersection of the lug top 4 and the shoulder 6 in each embodiment may be chamfered with a relatively large diameter, or the shoulder 6 in the fourth embodiment may be formed as a two-step inclined surface, The chamfer R in each embodiment is preferably a round chamfer, but may be a taper chamfer (flat chamfer).
[0017]
Further, in the third and fourth embodiments, the shoulder portion 6 is formed as a concave curved surface or a protruded curved surface, or the lower lug end portion 5 is formed and connected to the shoulder portion 6 via a chamfer. Is also good.
Further, when one of the right and left rubber crawlers 1 is set to be always disposed on the traveling body 12 side, the configuration of the lug 3 of the first to fourth embodiments is applied only to the side opposite to the traveling body 12. Alternatively, the distance from the end surface 2B of the crawler main body 2 on the opposite side to the lug top 4 may be set to 20% or more of the width of the crawler main body 2.
[0018]
【The invention's effect】
According to the present invention described in detail above, even when the ridge 18 is covered with the multi-sheet 19, the obstacle that the multi-sheet 19 is hooked by the lug end 5, the shoulder 6, etc. can be reduced.
[Brief description of the drawings]
FIG. 1 is a sectional front view showing a first embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a side view of the same.
FIG. 4 is a rear view of the same.
FIG. 5 is a sectional front view showing a second embodiment.
FIG. 6 is a plan view of the same.
FIG. 7 is a sectional front view showing a third embodiment.
FIG. 8 is a sectional front view showing a fourth embodiment.
FIG. 9 is a partial cross-sectional front view of a management machine that can use the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rubber crawler 2 Crawler main body 2A Grounding surface 2B End surface 2C Inner peripheral surface 3 Lug 4 Lug top 5 Lug end 6 Shoulder part 7 Projection 8 Rolling track R Chamfer W Width of lug top

Claims (3)

The lug formed on the grounding surface of the crawler body has a shoulder portion that gradually decreases from the lug top located at the middle of the crawler body width direction to the lug end, and an intersection between the shoulder and the lug end. A rubber crawler, wherein a chamfer is formed on the rubber track and / or the shoulder portion is formed by a two-step inclined surface. The lug formed on the ground contact surface of the crawler main body has a shoulder portion that is gradually reduced from the lug top located in the middle of the crawler main body width direction to the lug end, and the width of the lug top is 60% of the width of the crawler main body. A rubber crawler having the following settings. The lug formed on the grounding surface of the crawler body has a shoulder portion that gradually decreases from the lug top located at the middle of the crawler body width direction to the lug end, and the lug end is wider than the end of the crawler body. A rubber crawler, which is disposed inside.

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