JPH0578685U - Elastic crawler - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent deep scratches from occurring on the rug's indirect ground due to rocks and improve durability. [Structure] An endless crawler body made of an elastic material in which a cored bar 3 is embedded at predetermined intervals in the circumferential direction, and a lug 8 is projectingly provided on a ground side.
2 is an elastic crawler 1 in which a tensile body 4 is embedded in the circumferential direction, and the tensile body 4 in the crawler body 2 is connected to the ground plane 2A side.
A buffer layer 5 made of hard rubber or synthetic resin and a reinforcing cloth layer 7 made of canvas are formed on the entire circumference or in the lugs in the circumferential direction.
Place between 8

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an endless belt-shaped elastic crawler mainly made of an elastic material such as rubber used in agricultural machines, construction machines, various vehicles, snow vehicles, and the like.

[0002]

[Prior Art]

 Conventionally, as this kind of elastic crawler, those shown in FIGS. 4 and 5 are known. The crawler 11 is composed of an endless crawler body 14 made of an elastic material such as rubber, in which a cored bar 12 is embedded at predetermined intervals in the circumferential direction, and a lug 13 is projected on the ground side so as to be located between the cored bars 12. A tensile body consisting of a plurality of steel cords 15 in the width direction is embedded in the circumferential direction, and both ends of the steel cord 15 are polymer-bonded and wound around the drive wheels 16 and driven wheels (not shown). , Is rotated by the drive wheel 16.

[0003]

[Problems to be solved by the device]

 By the way, in the above-mentioned prior art, when the elastic crawler is used in an uneven terrain, especially in a place with a lot of rocks, stones, and rubble, when rocks are located between the lugs 13, the rocks are pinched between the ground and the cored bar 12. As shown in FIG. 5, scratches C easily enter the crawler body 14, and the scratches C reach the steel cord 15. During subsequent use, rainwater and the like enter the steel cord 15 to generate rust. This rust is likely to cut the steel cord 15 and lead to a crawler cutting accident.

The present invention has been made in view of the actual situation as described above, and an object thereof is to prevent deep scratches generated on a rug indirect ground due to rocks or the like, and improve durability of the crawler. It is to provide an elastic crawler that can.

[0005]

[Means for Solving the Problems]

 The present invention has taken the following technical means in order to achieve the above object. That is, according to the present invention, an elastic crawler is embedded in the circumferential direction in an endless crawler main body made of an elastic material in which a cored bar is embedded at predetermined intervals in the circumferential direction and a lug is projected on the ground side. In the roller, a cushioning layer made of hard rubber or synthetic resin and a reinforcing cloth layer made of canvas or the like should be circumferentially provided on the ground contact surface side of the tensile body in the crawler body in the circumferential direction or between the lugs. It has a feature.

Further, the present invention is characterized in that the buffer layer is covered with a reinforcing cloth layer.

[0007]

[Action]

 According to the present invention, since the buffer layer is provided on the ground contact surface side of the tensile body such as steel cord, the rigid body is separated by the buffer layer and even if the rug indirect ground is damaged by rocks, stones, etc. With the cushioning effect of the buffer layer, the depth of scratches is shallow, the reinforcement fabric layer is less likely to be damaged, and it also prevents the damage from reaching the tensile body.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, an elastic crawler 1 is composed of an endless crawler body 2 mainly made of an elastic material such as rubber, and a large number of cored bars 3 embedded in the crawler body 2 at predetermined circumferential intervals. , A tensile member 4 made of two steel cords and the like embedded in the circumferential direction in the width direction, a buffer layer 5, and reinforcing cloth layers 6 and 7.

A lug 8 is disposed on the ground side between the cored bars 3 in the crawler main body 2, and engaging holes 9 for driving wheels (sprocket) are equally spaced in the widthwise center between the cored bars 3. There are many in. The cored bar 3 is provided with drive wheel guide protrusions 10 projecting to the anti-grounding side on both sides of the engaging hole 9 in the width direction of the main body, and the drive force of the drive wheel is crawled through the cored bar 3. It is designed to be transmitted to the main body 2.

The tensile members 4 are arranged in the widthwise direction of the main body 2 in a laterally divided manner with the engagement holes 9 sandwiched therebetween. The buffer layer 5 is arranged on the ground side of the tensile body 4 in correspondence with the tensile body 4, and is covered with the reinforcing cloth layer 7. The buffer layer 5 is made of hard rubber or synthetic resin having cut resistance and pinch resistance. The reinforcing cloth layers 6 and 7 are formed by stacking one or a plurality of canvases made of organic fibers such as polyamide type, polyester type rayon, vinylon and aramid fibers.

The reinforcing cloth layer 6 is disposed between the core metal 3 and the tensile body 4 in correspondence with the tensile body 4. As described above, the reinforcing cloth layer 7 wraps the buffer layer 5 from the ground side to the anti-ground side while wrapping it outward in the width direction of the main body, so that the buffer layer 5 flows outward in the width direction of the main body during vulcanization. Can be prevented.

The thickness T1 of the buffer layer 5 is preferably 20 to 80% of the thickness T2 from the ground contact side surface of the tensile body 4 to the lug 8 indirect ground 2A of the crawler body 2. According to the above-described embodiment, since the buffer layer 5 is embedded on the ground side of the tensile body 4 to separate the rigid body, even if the lug 8 indirect ground 2A receives damage C as shown in FIG. Since the layer 5 is thick and the cushioning effect does not damage the grounding side reinforcing cloth layer 7, the tensile body 4 is less likely to be damaged, and therefore rainwater corrodes the tensile body 4 and cuts it. It never reaches.

The pinch resistance (ratio of scratches reaching the tensile body) in the above example is 24% of that of the conventional product, which is very excellent. In particular, the effect is great in the crawler with the inter-core lug arrangement type that causes less vibration. The present invention is not limited to the above embodiment, for example, the buffer layer 5 can be arranged only between the lugs 8, and the reinforcing cloth layer 7 can be arranged only on the ground side of the buffer layer 5. Also, it can be used for an elastic crawler of a lug arrangement type corresponding to a core metal.

[0014]

[Effect of the device]

 According to the present invention, as described above, the tensile body is circumferentially embedded in the endless crawler body made of an elastic material in which the core metal is embedded at predetermined intervals in the circumferential direction and the lugs are projected on the ground side. In the elastic crawler, a cushioning layer made of hard rubber or synthetic resin and a reinforcing cloth layer made of canvas or the like are circumferentially arranged on the grounding surface side of the tensile body in the crawler body in the circumferential direction or between the lugs. Since it is characterized by being installed, it is possible to improve the durability of the crawler by preventing deep scratches that occur on the rug indirect ground due to rocks and the like.

Further, the present invention is characterized in that the buffer layer is covered with a reinforcing cloth layer, so that the flow of the buffer layer during vulcanization is prevented and the designed thickness is secured. The intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 4 is an explanatory view showing a state in which a drive wheel is wound around a conventional example.

FIG. 5 is a vertical sectional side view of a main part of a conventional example.

[Explanation of symbols]

 1 elastic crawler 2 crawler body 2A lug indirect ground 3 core metal 4 tensile body 5 buffer layer 7 reinforcing cloth layer 8 lug

Claims (2)

[Scope of utility model registration request] 1. An elastic crawler in which a tensile body is embedded in the circumferential direction in an endless crawler body made of an elastic material in which a cored bar is embedded at predetermined intervals in the circumferential direction and a lug is projected on the ground side. In the crawler main body, a cushioning layer made of hard rubber or synthetic resin and a reinforcing cloth layer made of canvas or the like are arranged on the grounding surface side of the tensile body in the circumferential direction all around or between the lugs. An elastic crawler. 2. The elastic crawler according to claim 1, wherein the buffer layer is covered with a reinforcing cloth layer.