Core of elastic creeper tread

Abstract

A core bar for a track shoe of an elastic body is provided to reduce the weight by making a part of the core bar thin, and to prevent the elastic body from being deformed by forming a smooth rib reinforcing portion not to protrude the edge portion of the core bar. It is possible to secure a strength even when piercing a hole in the core bar and to prevent the elastic body from being cut by an edge portion of a hole. Accordingly, in a core bar (10) of an elastic body track shoe fastened to each pair of joint links of a crawler by bolts, recess portions (1a, 1b) formed in a substantially inverse-trapezoidal shape or recess portions (10a, 10b) formed in a substantially inverse-trapezoidal shape toward front end portions are formed in non-grounded surface sides of right and left wing portions in a direction of a crawler width. A recess portion (1e) formed in a substantially inverse-trapezoidal shape or a through hole (1f) may be formed in a center portion.

Description

technical field [0001] The present invention relates to a core bone embedded in an elastic body of an elastic body track shoe used for an endless rubber track of a construction machine or the like. Background technique [0002] In the past, in construction machinery such as hydraulic excavators and industrial vehicles such as crawler conveyor vehicles, endless rubber crawlers have been widely used. They are installed on elastic bodies such as rubber at predetermined intervals in the circumferential direction through a pair of hinged rings and connecting pins. It is composed of elastomer track shoes with core bones embedded in them. [0003] As the first prior art of such elastic body track shoes, there are known, for example, Figure 11 Elastomeric track shoes shown. exist Figure 11 Among them, the elastic track shoe 20 has an elastic body 22 such as rubber and a core bone 21 embedded in the elastic body 22 . The core bar 21 is cut in a predeter...

AI Technical Summary

Problems solved by technology

[0006] However, in the steel core for rubber crawlers disclosed in this gazette, the method of increasing the strength and reducing the weight of the steel core by making the top end of the core 31 protrude above the surface to form reinforcing ribs has a problem in that it sticks to the core metal 31. The elastic deformation of the connected rubber elastic body restricts the degree of freedom of deformation at the aforementioned raised ribs, which concentrates the elastic strain and accelerates the occurrence of fatigue cracks of the rubber elastic body

[0007] In addition, in the method of reducing the weight of the core bar 31 by opening holes in the core bar, there is a problem that since a plurality of hole portions 32, 32 are provided in the two wing portions 33, 33 of the core bar 31, the weight of the core bar 31 is reduced. The core bone strength of the two wing parts 33, 33, or the rubber elastic body deformed due to the load weight contacts the edge of the hole and is easy to break

Images