JP2000159161A - Rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber crawler light in weight and excellent in lateral follow-up on a road surface while maintaining preset rigidity and driving resistance. SOLUTION: A rubber crawler has metal cores 2 embedded in the cross direction at preset intervals in the longitudinal direction of the endless belt shaped rubber crawler 1 for driving the driven parts 9 of the metal cores 2 located at the center of the rubber crawler 1 with sprockets. The driven parts 9 of the metal cores 2 which are formed with one outsides cut in the cross direction are alternately arranged in a staggered form. The rubber roller 1 is easily familiar with a road surface in the lateral direction while maintaining preset rigidity and driving resistance, because of the existence of the cut portions of the metal cores 2 arranged in a staggered form, when travelling on a curved road surface, without floating at both sides. Thus, the crawler 1 has characteristics of low grounding pressure without causing slipping trouble.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler having a widthwise core metal embedded at predetermined intervals in the lengthwise direction, which is used by being attached to an endless track vehicle such as a snowmobile, a construction vehicle, or an agricultural work vehicle. About.

[0002]

2. Description of the Related Art Hitherto, in construction vehicles and agricultural work vehicles that are frequently used on muddy terrain or snowmobiles that frequently travel on slippery inclined snow, crawler belts with low ground pressure and easy traveling, that is, endless track belts. Tracks equipped with (crawlers) are often used. Usually, in order to increase the rigidity of the endless belt-shaped rubber track or to increase the driving resistance, the width direction of the rubber track is set at predetermined intervals in the length direction. Core metal is buried. These rubber crawlers are driven or rotated by driving or supporting a driving portion of a metal core located at the center of the rubber crawlers by driving sprockets arranged on the inner peripheral surface thereof and rolling wheels located on both sides thereof. You.

[0003]

Generally, the size of the rubber crawler relative to the drive sprocket is determined from the viewpoint of maintaining an appropriate curvature of the rubber crawler wound around the drive sprocket. Therefore, in the type in which the interval between the cores embedded in the rubber crawler is relatively large and has a margin, each tooth of the driving sprocket is provided with the driving holes formed at equal intervals in the length direction for each interval between the cores. The rubber crawler is driven by meshing with each hole. However, it is inevitable that the rigidity of the rubber crawler is low and the driving resistance is reduced due to the large interval between the cores. Therefore, even if each tooth of the drive sprocket meshes with every other drive hole formed at equal intervals in the length direction for each core bar, the distance between the core bars is reduced and the rubber crawler is reduced. Short pitch cored rubber crawlers, which are configured to ensure the rigidity and driving resistance of the above, are also frequently used. In this case, the core metal is embedded in the rubber track at a pitch close to the width of the core metal. However, in this case, although the rigidity and driving resistance of the rubber crawler are ensured, many cores are buried, which leads to an increase in weight and also increases the lateral rigidity as a rubber crawler, and the rubber crawler becomes When traveling on a curved road surface, the rubber crawler does not adapt to the road surface and travels in a state where both sides of the rubber crawler are floating, so that a low contact pressure, which is a characteristic of the crawler, cannot be obtained, which may lead to slippage.

In view of the above, the present invention has been made to solve the above-mentioned problems of the conventional rubber track, and to provide a rubber track which is lightweight and has excellent lateral road surface followability while securing predetermined rigidity and driving resistance. It is intended for.

[0005]

SUMMARY OF THE INVENTION Therefore, according to the present invention, there is provided an endless belt-shaped rubber track in which a width-wise core is buried at predetermined intervals in a longitudinal direction, and a core located at the center of the rubber crawler is driven. In a rubber crawler for driving a portion by a sprocket or the like, one obtained by cutting off one of a widthwise outer side of a driving portion of the cored bar is alternately arranged in a staggered manner. In the present invention, the core metal in the width direction is embedded at predetermined intervals in the length direction in the endless belt-shaped rubber track,
In a rubber crawler that drives a driving portion of a cored bar located at the center of the rubber crawler by a sprocket or the like, one of the widthwise outer sides of the driving portion of the cored bar is alternately arranged in a staggered manner as a narrow portion. Is what you do. Further, the present invention is characterized in that the ground lugs on the outer peripheral side of the rubber track are provided in a portion where the core metal is cut or a narrow portion and are arranged in a staggered manner. The present invention also provides
On the wing portion extending in the length direction located on both sides in the width direction of the driving portion of the cored bar, a protrusion and a groove for preventing lateral displacement to be engaged with adjacent ones in front and back are formed. These are the features and these are the means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a rubber crawler according to a first embodiment of the present invention. FIG. 1 is a plan view of a rubber crawler having a cored bar embedded therein, and FIG. 2 is a rubber crawler traveling on a curved road surface. FIG. As shown in FIG.
The endless belt-shaped rubber crawler 1 has a widthwise cored bar 2 buried therein at predetermined intervals in the lengthwise direction, and a driving unit 9 of the cored bar 2 located at the center thereof is driven by a sprocket or the like (not shown). You. The present invention is characterized in that one formed by cutting off one of the outer sides in the width direction of the driving portion 9 of the cored bar 2 is alternately arranged in a staggered manner. Sprocket guide projections 3, 3 projecting from the inner peripheral surface of the rubber crawler 1 are provided on both sides of the cored bar 2 in the width direction of the drive unit 9.
Although not shown, a reinforcing cord is usually embedded between the metal core 2 and the grounding surface in the length direction of the rubber track 1.

[0007] With this configuration, the rubber crawler 1
, The core 2 is embedded at a relatively dense pitch, even if it is formed by cutting off one of the outer sides in the width direction of the drive unit 9 of the core 2 located at substantially the center of the core 2. And, by these core metals 2 being arranged alternately in a staggered manner,
The rubber crawler 1 can secure predetermined rigidity and driving resistance. And it is lightweight. In addition, Figure 2
As shown in the figure, when traveling on a curved road surface, it is easy to adapt to the road surface even in the lateral direction due to the presence of the cut-out portions of the cored bar arranged in a staggered manner, traveling without lifting both sides of the crawler 1, A low contact pressure, which is a characteristic of the crawler, is obtained, and slip does not occur.

FIG. 3 shows a rubber crawler according to a second embodiment of the present invention, and is a bottom view of the rubber crawler as viewed from the grounding surface side. The present embodiment is based on the basic structure of the first embodiment, except that the ground lug 5 on the outer peripheral side of the rubber crawler 1 is provided at a portion where the core bar 1 is cut off and arranged in a staggered manner. It is a feature. With such a configuration, the lack of rigidity of the rubber crawler 1 in the cut portion of the cored bar 1 is effectively supplemented, and while taking advantage of the features of the present invention that are well adapted to the lateral shape of the road surface,
The overall strength of the rubber track 1 can be secured.

FIG. 4 shows a third embodiment of the rubber track of the present invention, and is a plan view and the like showing only a metal core embedded in the rubber track. This embodiment is based on the configuration of the first embodiment, and includes a driving unit 9 for the cored bar 2.
The wings 8, 8, which are located on both sides in the width direction and extend in the length direction, are formed with protrusions 6 and grooves 7 for preventing lateral displacement to be engaged between adjacent wings in front and rear. It is assumed that. With such a configuration, the projections 6 and the concave grooves 7 of the wing portions 8 extending between the adjacent metal cores 2 are always in an engagement relationship. Is present, it is possible to prevent the core metals 2 from being easily shifted in the lateral direction within the rubber crawler 1.

FIG. 5 shows a rubber crawler according to a fourth embodiment of the present invention, and is a plan view of a rubber crawler having a cored bar embedded therein. The second embodiment differs from the first embodiment in the width direction of the drive unit 9 of the core 2 in the width direction embedded at predetermined intervals in the length direction in the endless belt-shaped rubber track 1. One of the outer sides is alternately arranged in a staggered shape as a narrow portion 2A. With such a configuration, the narrow portion 2A of the cored bar 2 has a relatively low rigidity while maintaining a certain level of strength, is lightened, and can be adapted to the lateral shape of the road surface. It is needless to say that the structure of the second embodiment in FIG. 3 and the structure of the third embodiment in FIG.

Although the embodiments of the present invention have been described in detail, within the scope of the present invention, the shape and material of the rubber crawler, the shape of the core metal including the protruding form and the cross-sectional shape of the sprocket guide projections, and the like are also within the scope of the present invention. Material, embedding form of core metal in rubber crawler, shape of protrusions and grooves for preventing lateral displacement in wing part and their engagement form, shape of ground lug, shape of narrow part, rubber crawler by drive sprocket, etc. Can be appropriately adopted.

[0012]

As described above in detail, according to the present invention, the core metal in the width direction is embedded at predetermined intervals in the length direction in the rubber track of the endless belt shape, and is positioned at the center of the rubber track. In a rubber crawler that drives a driving part of a core metal to be driven by a sprocket or the like, a rubber crawler having a predetermined rigidity is obtained by alternately arranging one of the widthwise outer sides of the driving part of the core metal in a staggered manner. When traveling on a curved road surface while ensuring the driving force resistance, the staggered cutout of the core metal makes it easy to adapt to the road surface even in the lateral direction, and both sides of the crawler may float. Since there is no,
A low contact pressure, which is a characteristic of the crawler, is obtained, and slip does not occur. Also, in a configuration in which one of the outer sides in the width direction of the driving portion of the cored bar is alternately arranged in a staggered shape as a narrowed portion, the narrowed portion of the cored bar has a relatively low rigidity while maintaining a certain level of strength and is lightweight. It is possible to adapt to the lateral shape of the road surface.

Further, when the ground lugs on the outer peripheral side of the rubber track are provided in a staggered manner by providing the ground bar at a portion where the core metal is cut off or at a narrow portion, it becomes possible to adapt to the lateral shape of the road surface well. However, the lack of rigidity of the rubber crawler in the cut portion or the narrow portion of the core metal is effectively compensated for, and the rubber crawler as a whole is utilized while taking advantage of the characteristics of the present invention that is well adapted to the lateral shape of the road surface. Strength can be secured. Further, on the wing portion extending in the length direction located on both sides in the width direction of the driving portion of the core bar, a protrusion and a groove for preventing lateral displacement to be engaged between adjacent ones in front and rear are formed. In this case, the projections and the concave grooves on the wings extending between the adjacent metal cores are always engaged with each other. Therefore, the presence of the cut-out portions of the metal core allows the metal cores to lie side by side within the rubber crawler. This can be suppressed even if it tends to shift in the direction. As described above, according to the present invention, a rubber crawler that is lightweight and has excellent lateral road surface followability while ensuring predetermined rigidity and driving resistance is provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a rubber crawler according to a first embodiment of the present invention, in which a core metal is embedded.

FIG. 2 shows a first embodiment of the rubber track of the present invention, and is a cross-sectional view of the rubber track traveling on a curved road surface.

FIG. 3 is a bottom view of a rubber track according to a second embodiment of the present invention, as viewed from the grounding surface side of the rubber track;

FIG. 4 is a plan view of a rubber track according to a third embodiment of the present invention, showing only a metal core embedded in the rubber track;

FIG. 5 is a plan view showing a rubber track according to a fourth embodiment of the present invention, in which a metal core is embedded.

[Description of Signs] 1 Rubber crawler 2 Core 2A Narrow part 3 Sprocket guide projection 4 Drive hole 5 Ground lug 6 Lateral deviation prevention projection 7 Lateral deviation prevention groove 8 Wing 9 Drive unit

Claims (4)

[Claims] 1. A rubber crawler having a width-direction core metal embedded at predetermined intervals in a length direction in an endless belt-like rubber crawler, and driving a driving portion of the core metal located at the center of the rubber crawler by a sprocket or the like. A rubber crawler, characterized in that one of the core metal driving portions cut off on the outer side in the width direction is alternately arranged in a staggered manner. 2. A rubber crawler in which a width-direction core is embedded at predetermined intervals in a length direction in an endless belt-shaped rubber crawler, and a driving portion of the core located at the center of the rubber crawler is driven by a sprocket or the like. A rubber crawler, wherein one of the outer sides of the core metal driving section in the width direction is alternately arranged in a staggered manner as a narrow section. 3. A grounding lug on an outer peripheral side of a rubber crawler is provided in a portion where the core metal is cut or a narrow portion, and is arranged in a staggered manner.
The rubber crawler according to the above. 4. A lateral slippage prevention projection and a concave groove which are engaged with front and rear adjacent wing portions which are located on both sides in the width direction of the driving portion of the core bar and extend in the length direction. The rubber crawler according to any one of claims 1 to 3, wherein a rubber crawler is formed.