JPH03220071A - Rubber crawler shoe - Google Patents

Abstract

PURPOSE:To improve the lateral rigidity without deteriorating the elastic bending extension of an elastic endless belt by embedding two layers of elastic deformation suppressing strip members crossing in the bias direction on the underside of a metal core embedded on the underside of the elastic endless belt. CONSTITUTION:Inside an elastic endless belt 1 made of rubber, a number of metal cores 2 are embedded in equal intervals in the direction crossing at right angles with the longitudinal direction. The center part of the metal core 2 is exposed from the elastic endless belt 1, and a guiding projection part 2a and a stepping surface 2b on which a free wheel, etc. roll are formed on the exposed part. Further, on the underside of the metal core 2, a number of pulling resistive strip members 3 are embedded in equal intervals in the width direction along the longitudinal direction of the elastic endless belt 1. In this case, on the underside of the pulling resistive strip member 3, two layers of elastic deformation suppressing strip members 4 and 5 which are biased in the crossing direction each other are embedded. The bias crossing angle between the elastic deformation suppressing strip members 4 and 5 is set within a range of 10-150 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rubber crawler shoe for use in tracked vehicles, and more particularly to a rubber crawler shoe in which a deformation suppressing member for suppressing elastic deformation is embedded within the shoe body.

[Conventional technology]

Conventionally, tracked vehicles that can travel on general roads have used rubber crawler shoes around their suspensions.

Furthermore, as shown in Fig. 4, the conventional rubber crawler shoe has a structure in which a large number of metal cores are embedded at equal intervals in a direction perpendicular to the longitudinal direction of the elastic endless band a in an elastic endless band a made of rubber. A protrusion C for guiding and a tread d on which the rolling wheels are transferred are formed on the upper surface of the metal core at positions symmetrical to the center in the width direction.

However, in the above-mentioned conventional rubber crawler shoe, the metal cores embedded in the elastic endless band a are not connected to each other in the longitudinal direction of the elastic endless band a, so that the elastic endless band a is If the rubber crawler shoes are deformed, the position of the tread surface d will shift, causing the rollers to miss the tread surface d, and the rubber crawler shoes will come off the rollers and idler wheels.

In order to prevent the above-mentioned problems, it has been proposed that elastic deformation suppressing strips e are buried symmetrically in a biased manner as shown in Fig. 5 below the metal core. 56-2274, etc.).

[Problem to be solved by the invention]

However, in the case where the elastic deformation suppressing strip e is provided in a biased manner as in the above-mentioned conventional method, the resistance effect is low because it is compressively deformed in response to the external force F acting in the lateral direction of the elastic endless band a.

It is also disclosed that the elastic deformation suppressing strip e is provided in two layers in order to increase the drag effect, but when provided in two layers, the hardness of the elastic layer between the metal core and the elastic deformation suppressing strip e is When the elastic endless band a is curved along the outer circumferential surface of the sprocket or the idler wheel due to an excessively high value, fatigue of the fault portion between the metal cores progresses, resulting in a shortened service life.

There is also a disclosure that it is better to bury the elastic deformation suppressing strip d at an angle of 45 degrees in order to increase the rigidity in the lateral and torsional directions, but if the elastic deformation suppressing strip e is buried at an angle of 45'',
As shown in Figure 6, a part of the elastic deformation suppressing strip e (black painted part) is buried across the front and rear metal cores, so the degree of freedom in the spacing between the metal cores is suppressed. When the endless elastic band a bypasses the sprocket or idler wheel, the elastic deformation between the metal cores decreases and the bending rigidity increases, so a large and powerful tensioning device is used to tension the endless elastic band a. There were also some problems that required the use of the same equipment, making it expensive.

The present invention was made in order to improve the above-mentioned problems, and it is an object of the present invention to provide a rubber crawler shoe that can increase the lateral rigidity without impairing the elastic bending and stretching action.

[Means and effects for solving the problem] In order to achieve the above object, the present invention includes an elastic endless band made of rubber,
A rubber having a large number of metal cores buried at equal intervals in a direction perpendicular to the longitudinal direction of the endless strip, and a tension-resistant strip material buried below the metal cores along the longitudinal direction of the elastic endless strip. In a crawler shoe, two layers of elastic deformation suppressing strips biased in mutually intersecting directions are embedded below the tension strips, and the mutually crossing elastic deformation suppressing strips form an elastic endless band. In order to resist external forces that act from the lateral direction, the lateral rigidity can be significantly improved.

〔Example〕

An embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 denotes an elastic endless band made of rubber, in which a large number of metal cores 2 are embedded at equal intervals in a direction perpendicular to the longitudinal direction.

The central part of the metal core 2 is exposed from the elastic endless band 1, and in this exposed part, a guide protrusion 2a is provided at a position symmetrical to the center of the elastic endless band 1 in the width direction, and a guiding protrusion 2a is provided on the outside thereof. Tread 2 where idle wheels and rolling wheels (both not shown) are transferred to
b is formed.

Further, on the lower side of the metal core 2, there are a large number of tension-resistant strips 3 along the longitudinal direction of the elastic endless band 1 and equally spaced in the width direction. Two layers of biased elastic deformation suppressing strips 4 and 5 are embedded.

The former tension-resistant strip 8 is formed of an endless metal cable, and is designed to resist the load applied in the longitudinal direction of the elastic endless band 1 and prevent the elastic endless band 1 from elongating in the longitudinal direction. It has become.

The latter elastic deformation suppressing strips 4 and 5 are intended to increase the lateral rigidity against external forces applied to the elastic endless band 1 from the lateral direction, and are buried throughout the entire area below the buried portion of the metal core 2. At the same time, the bias angle is made small so that the metal core bar 2 is buried so as not to straddle the front and rear metal core bars 2, as shown in FIG.

Next, to explain the operation, the rubber crawler shoe configured as described above is used by being wrapped between the sprocket and the idler wheel of a tracked vehicle (not shown), and the sprocket meshes with the center part of the metal core 2. The entire shoe is driven to rotate.

In addition, the idler wheels and rolling wheels (none of which are shown) move along the tread surface 2b provided on the outside of the guide protrusion 2a, so that the load in the longitudinal direction applied to the endless elastic band while traveling is resistant to the load. The tension strip 3 supports this and suppresses the extension of the elastic endless band 1 in the longitudinal direction.

On the other hand, in response to an external force F that acts from the lateral direction during running, [shearing force of the elastic endless band 1] + (compressive force of the tension-resistant strip 3) + [
Shearing force of the elastic layer 1a between the tension strip 2 and the elastic deformation suppressing strip 4]+[Compressive force of the elastic deformation suppressing strip 4]+[Tensile force of the elastic deformation suppressing strip 5]+[Elastic deformation suppressing By countering this with the pull-out force of the strip 5, the lateral rigidity can be significantly improved compared to the conventional one.

〔Effect of the invention〕

As described in detail above, this invention has two layers of elastic deformation suppressing strips whose bias directions intersect below the metal core embedded in the elastic endless band. In addition to greatly improving the lateral rigidity of the endless strip, elastic deformation suppressing strips can be embedded without spanning the front and rear metal cores, so elastic deformation between the metal cores is not suppressed. Since the bending rigidity of the endless elastic band does not increase, there is no need to increase the size of the tensioning device for tensioning the endless elastic band, which is economical.

Moreover, the shearing force applied to the elastic layer between these strips can be alleviated by the elastic deformation suppressing strips having a two-layer structure with different bias directions, so that durability can be improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway bottom view, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is an explanatory view of the operation, and Figs. FIG. 6 is a conventional explanatory diagram. 1 is an elastic endless band, 2 is a metal core, 3 is a tension strip, 4, 5
is an elastic deformation suppressing strip. Figure 1 Figure 4 Figure 2 Figure 5 Figure 6

Claims (2)

[Claims] (1) A large number of metal cores 2 are embedded at equal intervals in the elastic endless band 1 made of rubber in a direction perpendicular to the longitudinal direction of the endless band 1, and below these metal cores 2, the elastic In a rubber crawler shoe in which a tension strip 3 is embedded along the longitudinal direction of the endless band 1, two layers of elastic deformation suppressing strips 4 are biased in directions that intersect with each other below the tension strip 3. ,
A rubber crawler shoe made by embedding 5. (2) The rubber crawler shoe according to claim 1, wherein the bias intersection angle of the elastic deformation suppressing strips 4 and 5 is set in a range of 10° to 150°.