JP3063033B2 - Rubber crawler shoe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler shoe for use in a soft vehicle, and more particularly to a rubber crawler shoe in which a deformation suppressing member for suppressing elastic deformation is embedded in a shoe body.

[Conventional technology]

2. Description of the Related Art Conventionally, a rubber crawler shoe is used around a foot in a vehicle equipped with a vehicle capable of traveling on a general road.

A conventional rubber track shoe has a structure in which a number of metal cores b are buried at equal intervals in a direction orthogonal to the longitudinal direction of the elastic endless band a in an elastic endless band a made of rubber as shown in FIG. A guide protrusion c and a road surface d on which rolling wheels roll are formed at positions symmetrical with respect to the center in the width direction on the upper surface of the metal core bar b.

However, in the conventional rubber crawler shoe described above, since the metal cores b embedded in the elastic endless band a are not connected to each other in the longitudinal direction of the elastic endless band a, the elastic endless band a may If it is deformed, the position of the road surface d shifts, the rolling wheel steps off the road surface d, and the rubber crawler shoe comes off the rolling wheel or the idler wheel.

In order to prevent the above problem, a fifth metal
As shown in the figure, there has been proposed a structure in which an elastic deformation suppressing member e is buried in a bias shape so as to be symmetrical (for example, Japanese Patent Application Laid-Open No. Sho 56-2274).

[Problems to be solved by the invention]

However, when the elastic deformation suppressing member e is provided in a biased shape as in the above-described conventional case, the elastic endless band a is compressed and deformed by an external force F acting from the lateral direction, so that the drag effect is low.

It is also disclosed that, in order to enhance the drag effect, the elastic deformation suppressing strip material e is provided in two layers with a tension-resistant strip material interposed therebetween. In such a case, the rotational force transmitted from the metal core bar b suppresses the elastic deformation. Since the elastic member is transmitted to the tension-resisting member via the member e, the shearing force is repeatedly applied to the elastic deformation suppressing member e. As a result, the fatigue of the fault portion between the metal cores b is advanced, and the life is shortened. There is a defect.

It is also disclosed that the elastic deformation suppressing member d should be embedded at an angle of 45 ° in order to increase the rigidity in the lateral direction and the torsional direction. As shown in the figure, a part (black painted portion) of the elastic deformation suppressing strip material e is buried across the front and rear metal cores b, so that the degree of freedom of the interval between the metal cores b is suppressed and the elasticity is reduced. When the endless belt a winds a sprocket or idler, the elastic bending between the metal cores b is subjected to the tensile bending of the elastic deformation suppressing strip, so that the winding bending rigidity increases and the elastic endless belt A large tensioning device is required for the tensioning device a, and there has been a problem that it is expensive.

SUMMARY OF THE INVENTION The present invention has been made for the purpose of improving the above disadvantages, and an object thereof is to provide a rubber crawler shoe capable of increasing the lateral rigidity without impairing the elastic bending / extending action.

[Means and Actions for Solving the Problems]

In order to achieve the above object, the present invention provides an elastic endless belt made of rubber, in which a meshing portion meshing with a sprocket is formed in a central portion, and a road surface on which rolling wheels roll on both sides thereof is formed. In a rubber crawler shoe in which a large number of metal cores having a wing shape formed therein are orthogonal to the longitudinal direction of the elastic endless band, and are buried at regular intervals in the longitudinal direction, a plate-like wing portion of the metal core metal is provided. Below the elastic endless strip, and a two-layer elastic deformation suppressing strip biased in a direction crossing each other below the tensile endless strip. It is buried sequentially over almost the entire circumference, compressive strain is applied to one of the elastic deformation suppressing strips that cross each other, and tensile strain is applied to the other elastic deformation suppressing strip,
By repelling each other, the lateral deformation force is counteracted, so that the lateral rigidity can be greatly improved.

Also, the elastic endless strip 1 has two layers of elastic deformation suppressing strips biased in mutually intersecting directions so that both ends of each cord do not straddle the projection plane of the metal core 2 adjacent to each other. The elastic deformation between the metal cores is not suppressed by the elastic deformation suppressing member.

〔Example〕

One embodiment of the present invention will be described in detail with reference to FIGS.

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

The central portion of the metal core 2 is exposed from the elastic endless band 1, and the exposed portion is located at a position symmetrical with a meshing portion 2 d meshing with a sprocket (not shown) from the center in the width direction of the elastic endless band 1. A guide projection 2a and a road surface 2b on which a rolling wheel (not shown) rolls are formed on the outside thereof, and plate-like wings embedded in the elastic endless belt 1 are provided on both ends. A portion 2c is formed.

Below these plate-shaped wings 2c, a number of tension strips 3 are provided along the longitudinal direction of the elastic endless band 1 and at equal intervals in the width direction, and in a direction crossing each other below. Two layers of elastic deformation suppressing members 4 and 5 which are biased are embedded.

The tension member 3 is formed of an endless metal cable and resists a load applied in the longitudinal direction of the elastic endless band 1 so as to prevent the elastic endless band 1 from extending in the longitudinal direction. It has become.

The latter elastic deformation suppressing strips 4 and 5 are for increasing the lateral rigidity under the external force applied to the elastic endless belt 1 from the lateral direction, and the embedded portions of the left and right plate-shaped wings 2c of the metal core 2 are provided. It is buried all over the surface and below the tension member 3,
The bias angle is made small, and as shown in FIG. 3, it is embedded so as not to straddle the front and rear metal cores 2.

Next, the operation will be described. The rubber crawler shoe constructed as described above is used by being wound between a sprocket and an idler wheel of a soft vehicle (not shown), and the sprocket is made of a metal core 2.
And the whole shoe is rotationally driven.

Rollers (not shown) are adapted to roll on a road surface 2b provided outside the guide protrusion 2a. Carry the elastic endless band 1 and suppress the longitudinal extension of the elastic endless band 1.

On the other hand, for an external force F acting from the lateral direction during traveling,
[Shearing force of elastic endless belt 1] + [Compression force of tension-resistant strip 3]
+ [Shearing force of elastic layer 1b between tension member 3 and elastic deformation suppressing member 4] + [Compressive force of elastic deformation suppressing member 4] + [Elastic deformation suppressing member 4 and elastic deformation suppressing member 5] The transverse rigidity can be greatly improved as compared with the conventional one by countering the shear force of the elastic layer a between them] + [tensile force of the elastic deformation suppressing strip 5].

〔The invention's effect〕

As described above in detail, in the present invention, two layers of elastic deformation suppressing members whose bias directions cross each other are buried almost all around the elastic endless band below the metal core embedded in the elastic endless band. Because these elastic deformation suppressing strips greatly improve the lateral rigidity of the entire elastic endless belt, the elastic endless band deforms laterally when working on uneven terrain or turning, causing rolling wheels and idle wheels, etc. It is possible to eliminate a problem such as a disconnection.

In addition, since both ends of each cord of the elastic deformation suppressing strip are embedded so as not to straddle the projection plane of the metal core adjacent to each other, elastic deformation between the metal cores is not suppressed, and Since the bending rigidity of the elastic endless band does not increase, it is not necessary to increase the size of the tensioning device for tensioning the elastic endless band, and it is economical.

Further, the shearing force applied to the elastic layer between these strips can be reduced by the two-layered elastic deformation suppressing strips having different bias directions, so that the durability can be improved.

[Brief description of the drawings]

1 shows an embodiment of the present invention, FIG. 1 is a partially cutaway bottom view, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. FIG. 6 is an explanatory diagram of the related art. 1 is an elastic endless band, 2 is a metal core, 3 is a tension-resistant strip, and 4 and 5 are elastic deformation suppressing strips.

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 55/253

Claims (2)

(57) [Claims] 1. An elastic endless belt 1 made of rubber has a meshing portion 2d which meshes with a sprocket at a central portion, a road surface 2b on which rolling wheels roll on both sides thereof, and plate-like wing portions on both ends. In a rubber crawler shoe in which a large number of metal cores 2 formed with 2c are embedded so as to be orthogonal to the longitudinal direction of the elastic endless band 1 and at equal intervals in the longitudinal direction, the plate-like wings of the metal core 2 Below the portion 2c, a tension member 3 is provided along the longitudinal direction of the elastic endless band 1, and below the tension member 3, a two-layer elastic deformation suppressing member biased in a direction intersecting with each other. A rubber crawler shoe characterized in that members (4, 5) are sequentially embedded over substantially the entire circumference of the elastic endless belt (1). 2. The two-layer elastic deformation suppressing members 4 and 5 biased in mutually intersecting directions so that both ends of each cord do not straddle the projection plane of the metal core bar 2 adjacent to each other. The rubber crawler shoe according to claim 1, wherein the shoe is embedded in the elastic endless belt (1) at an angle.