JPH0530673B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a core bar embedded in an elastic endless track belt (hereinafter referred to as crawler) mainly applied to civil engineering applications.

[Conventional technology]

The core metal embedded in the crawler body has the functions of supporting the load of the traveling vehicle and engaging with the teeth of the drive sprocket. Crawlers used in agricultural combine harvesters and harvesters have small running vehicles and run in wet fields, etc., so there are problems with their strength if they can be used as is for civil construction.

An example of an improved core metal structure is the core metal described in JP-A-54-146338, which has a core metal base embedded in an elastic material and a metal core protruding inside the raceway band. Consisting of a pair of protrusions and a wheel support part located between the pair of protrusions and formed at a position corresponding to the rotation locus of the wheel, the wheel support part receives the weight of the vehicle. is being developed. Further, in the device described in Japanese Utility Model Application Publication No. 55-102683, outer rolling surfaces are formed on both sides of a pair of protrusions, and the rolling portion of the outer wheel rolls on the outer rolling surfaces. It's getting old.

[Problem to be solved]

The rolling wheel support described in JP-A-54-146338 extends in the longitudinal direction of the raceway band so as to fill the gap between the cored metals, so that the rolling wheel does not fall between the cored metals. The main purpose of this is to prevent vibrations caused by rolling. In addition, the wheel bearing is located at the lower end of the pair of protrusions of the core metal, and is not embedded in the elastic material and is surrounded by the drive hole. When this happens, a force is applied that lifts both ends of the core metal embedded in the elastic material, causing damage to the core metal or both ends of the core metal embedded in the elastic material tending to pop out of the elastic material, causing the metal core to break away from the core metal. There was also a risk that the elastic material would peel off. This conventional example is used for agricultural combine harvesters, and since the vehicle weight is light, a wheel bearing with this structure is sufficient in terms of strength. However, when supporting a heavy vehicle for construction work, There was a considerable risk that the joint between the wheel bearing and the core metal would be damaged, or that part of the core metal would come out of the elastic material. Therefore, the elastic material is subject to the effect that both ends of the core tend to protrude upward every time the weight of the vehicle is applied to the wheel bearing, resulting in poor durability.

Utility Model Application Publication No. 55-102683 describes those used in agricultural vehicles such as combines, but the length of the outer raceway in the longitudinal direction of the raceway belt is not described at all. However, it is unclear how the durability of elastic materials is addressed when used in civil engineering. In other words, it cannot be said that sufficient durability has been taken into consideration when used for construction purposes. Furthermore, if the core metal is long in the longitudinal direction, the weight of the core metal also increases.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a structure of a core metal that can increase the durability of the elastic material in which the core metal is embedded and satisfy the requirements for a crawler used for civil engineering.

[Means to solve the problem]

In order to achieve the above object, the present invention has the following configuration.

That is, the structure of a core metal used embedded in a crawler that is wound around a driving wheel, an idler wheel, and a support wheel in a traveling device, the core metal base being embedded in an elastic material, and the core metal base embedded in an elastic material; A pair of protrusions projecting inward of the crawler, and a thick part located outside the pair of protrusions and formed from the base of the metal core toward the inside of the crawler, and the top surface of the thick part. The structure of the core metal embedded in the crawler is characterized in that the length of the top surface of the crawler in the longitudinal direction is longer than the length of the crawler in the width direction so as to serve as the running surface of the support ring.

[Effect]

According to a crawler using such a core metal, there is no elastic material sandwiched between the base of the core metal embedded in the elastic material and the support ring, and sufficient strength can be obtained even when subjected to repeated large loads. .

Especially when used for civil engineering, the entire base of the core metal and part of the protrusion are buried in the elastic material, so even if a large load is repeatedly applied to the top surface of the thick part, the core metal and elastic material There is no risk of peeling off.
Further, since the top surface of the thick portion is formed to be elongated in the longitudinal direction of the crawler so as to serve as a running surface for the support wheel, the support wheel also runs smoothly.

〔Example〕

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1a is a front view of a first embodiment of a core metal 1 according to the present invention, FIG. 1b is a side view thereof, and FIG. 1c is a plan view thereof.

In this example, a metal core base 2 is embedded in the crawler, and a pair of protrusions 3, 3 are formed on this. On the outside of these protrusions 3, 3, there are thick parts 4, 4 which face toward the inside of the crawler from the base 2.
is formed.

A support wheel runs on the top surface 5 of the thick portions 4, 4.

This top surface 5 is formed in such a shape that the length in the longitudinal direction of the crawler is longer than the length in the width direction, and as shown in FIG. It is said that the length is equal to or longer than that. Further, the width of the top surface 5 in the crawler width direction is made wider than necessary to prevent the weight of the core bar 1 from increasing. Furthermore, in order to improve the strength of the thick parts 4, 4, whose length in the longitudinal direction of the crawler is larger than the width in the width direction of the crawler, the core metal 1 is placed on the core base 2 from the thick parts 4, 4. Slanted portions 7 that gradually become lower toward both ends and have a thinner wall thickness in the longitudinal direction of the crawler are provided to serve as ribs.

FIG. 2 shows a second example of the present invention, in which a is a plan view and b is a side view.

In this case as well, the thick parts 4, 4 are on the outer side of the projections 3, 3, but in this example, the entire thick parts 4, 4 are on the outside of the projections 3, 3.
It is formed integrally with.

What is shown by a chain line in the figure is the support wheel 6, which runs on the top surface 5 of the thick portions 4, 4.

FIG. 3 is a plan view showing another example of the core metal 1 of the present invention, and in this case, the thick parts 4, 4, which are the running surfaces of the support ring 6, further extend beyond the width of the core metal base 2. It is something that

In other words, the thick portions 4, 4 extend forward and backward in the longitudinal direction of the crawler. Therefore, the contact time between the support ring 6 and the top surface 5 of the thick wall portion 4 becomes longer, and the vertical movement of the machine body is also reduced.

〔effect〕

As explained above, in the crawler using the core metal according to the present invention, the core metal base, which is a rigid body, and the support ring, which is also a rigid body, come into direct contact with each other, and the flexible Since there is no elastic body (rubber), the strength of the crawler is significantly improved, with no deterioration in durability.

In particular, those for civil engineering use have a heavy vehicle weight, but because the entire base of the core metal is fully buried in the elastic material and a large load is repeatedly applied to the top surface of the thick wall, it may cause damage to the core metal. No peeling occurs between the material and the elastic material. Further, since the length of the top surface of the thick portion in the longitudinal direction of the crawler is longer than the length in the width direction of the crawler, the support wheel runs smoothly, and the weight of the entire core metal is not increased unnecessarily.

When the length of the top surface of the thick portion in the longitudinal direction of the crawler is made longer than that of the base of the core metal, the support ring is prevented from falling and vertical movement of the machine body is also reduced.

Furthermore, in the case where a sloped portion is provided, the sloped portion improves the strength of the thick portion that functions as a rib.

[Brief explanation of the drawing]

FIG. 1a is a front view of the first embodiment of the core metal 1 according to the present invention, b is a side view thereof, and c is a plan view thereof,
FIG. 2 shows a second example of the present invention, in which a is a plan view thereof, b is a side view, and FIG. 3 is a plan view showing another example of the core bar 1 of the present invention. 1... Crawler, 2... Core metal base, 3... Protrusion, 4... Thick part.

Claims (1)

[Scope of Claims] 1. A structure of a core metal embedded in an elastic endless track band wrapped around a drive wheel, an idler wheel, and a support wheel in a traveling device, the core metal being embedded in an elastic material. a core metal base, a pair of protrusions protruding inwardly of the raceway band, and a thick wall portion positioned outside the pair of protrusions and formed from the core metal base toward the inner side of the raceway band. , wherein the top surface of the thick portion is formed in such a shape that the length in the longitudinal direction of the crawler on the top surface is longer than the length in the width direction so that the top surface of the thick portion serves as a running surface of the support ring. Structure of core metal for track belt. 2. The elastic endless track belt according to claim 1, wherein the length of the top surface of the thick portion in the longitudinal direction of the crawler is longer than the length of the base of the core bar in the longitudinal direction of the crawler. Structure of core metal. 3. The structure of the elastic endless track band core metal according to claim 2, wherein the top surface of the thick portion extends in at least one of the front and back directions of the core metal base in the longitudinal direction of the crawler. . 4. Claims 1 or 2, characterized in that an inclined part is provided on the base of the core metal, the thickness gradually decreasing from the thick part toward both ends of the core metal, and having a thinner wall thickness in the longitudinal direction of the crawler. The structure of the core metal for elastic endless track belt described in 2.