JPH0127995Y2 - - Google Patents

Description

[Detailed description of the invention] <Field of application of the invention> The present invention relates to an elastic track belt (hereinafter referred to as crawler) for vehicles such as agricultural combines.
In particular, the service life of the crawler has been extended.

<Prior Art> In general, a crawler has a plurality of core metals extending in the axial direction and arranged in parallel at regular intervals in the circumferential direction, and a plurality of core metals arranged in parallel in the width direction surrounding all of these core metals with the outer periphery. It has a structure in which one or more tensile reinforcing material blocks made of tensile reinforcing material of The two protrusions of the core protruding from the circumferential surface guide the wheels attached to the vehicle one after another, thereby preventing the wheels from coming off. However, since the main body of such crawlers is basically made of an elastic material such as rubber, torsional rigidity is low, and depending on the conditions of the running road surface, the wheels may ride on the core metal, leading to the wheels falling off. . In such a case, the crawler will be in a twisted state and the tensile reinforcement will be under abnormal tension,
The outer side of each block of this tensile reinforcing material is subjected to a higher abnormal tension. This can sometimes result in tearing of the outermost tensile reinforcement.
The cracks then progress inward one after another, potentially shortening the service life of the crawler.

<Structure of the invention> The present invention aims to eliminate the drawbacks of such crawlers, and its gist is that a plurality of core metals extending in the width direction of the track band and arranged in parallel at regular intervals in the circumferential direction, All of these core metals are surrounded by their outer periphery and integrated with one or more tensile reinforcement blocks consisting of a plurality of tensile reinforcements arranged in parallel in the width direction of the track band, embedded in the elastic body. In the crawler, a tensile reinforcing material is laminated on both outer sides of the tensile reinforcing material block in a portion surrounding the widthwise tip of the raceway band of the core bar, so that the tensile reinforcing material has a higher tensile strength than the tensile reinforcing material constituting the block. It is characterized by being buried and integrated as a large reinforced part.

The members to be laminated here do not need to be anything special; the tensile reinforcing material constituting the block can be used as is, and by simply specifying the positional relationship with the tip of the core metal, Technically speaking, it is possible to provide a highly effective crawler with a simple configuration.

<Example> Next, the present invention will be explained in more detail with reference to the drawings.

Figure 1 shows a cross section passing through the core metal of the crawler according to the present invention, and 1 in the figure shows the endless elastic body made of an elastic material such as rubber. Core bars 3a and 3b are blocks of tensile reinforcing material 3 made of steel cords, etc., which are arranged in parallel in the width direction of the crawler in a state surrounding the core bar and embedded in the elastic body; 4 is a core bar on the outer periphery of the elastic body. This is a grounding lug formed to correspond to Gold 2.

The core metal 2 has a core metal protrusion 5 protruding from the inner peripheral surface of the crawler, and this protrusion 5 guides the rolling wheels attached to the vehicle on both sides or between them and prevents the wheels from coming off. There is. However, as mentioned above, since the body of the crawler is an elastic body made of rubber or the like, when the conditions of the running road surface or the shaking of the vehicle body become unusual, the wheels may become stuck on the protrusion. This caused the vehicle to run over the road and cause the train to fall off the track. In such a case, a large twist occurs in the crawler near the core metal 2 having the projection 5, and as a result, the tensile reinforcing member 3 is subjected to abnormal tension in a twisted state. At that time, core metal 2
Twisting in the width direction of the crawler has the greatest effect on the tensile reinforcing material, and in particular, the twisting at the tip of the core bar 2 has a larger abnormal tension as the tensile reinforcing material is located on the outside, and as mentioned above, depending on the case. Sometimes, one piece at a time is cut from the outer tensile reinforcement.

The crawler of the present invention has the above-mentioned blocks 3a and 3.
The tensile strength of b is strengthened at the position corresponding to the tip of the core bar 2 on both sides in the width direction, and the tensile reinforcing material located at the outermost side of each block is made of the same material. It is laminated and has extremely strong tensile strength at this point.
This is embedded and integrated in rubber. In reality, for example, if the tensile strength of each inner tensile reinforcing material 3 is 90Kg, the tensile strength of the outermost laminated part is 160Kg, and the former is 160Kg.
In this case, the latter would be 400Kg.

Although not shown in the drawings, both the outermost and innermost parts of each block 3a and 3b, which correspond to the tip of the core bar 2, can have a laminated structure, so that they can be easily prevented from getting caught in stones, etc. It is also possible to cope with the resulting cutting of the tensile reinforcement from the inside.

<Effects> The present invention strengthens the tensile strength on both sides of the block, and with simple structural improvements, it is able to withstand the most severe effects even when abnormal tension occurs on both sides of the block, such as when the wheels come off. Since high strength is imparted to the parts to sufficiently resist the forces that tend to cause breakage, a durable and long-life crawler can be provided.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view through the core of the crawler of the present invention. 1... Elastic main body, 2... Core bar, 3... Tensile reinforcing material, 3a, 3b... Block of tensile reinforcing material.

Claims (1)

[Scope of utility model registration request] A plurality of core metals extending in the width direction of the track strip and arranged in parallel at regular intervals in the circumferential direction, and a plurality of tensile reinforcing members that surround all of these core metals with their outer peripheries and are arranged in parallel in the width direction of the track strip. In an elastic endless track band formed by embedding and integrating one or more tensile reinforcing material blocks in an elastic main body, the width direction of the track band of the core metal is formed at both outer sides of the tensile reinforcing material block. 1. An elastic endless track band, characterized in that a portion surrounding the tip is embedded and integrated by laminating a tensile reinforcing material to form a reinforcing portion having a higher tensile strength than the tensile reinforcing material constituting the block.