JP3198190B2 - Rubber crawler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rubber crawler, and more particularly to an improvement of a rubber lug formed on an outer peripheral surface of a rubber crawler.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have been widely used instead of iron crawlers as running parts of agricultural machines and construction machines. Since the rubber crawler is entirely formed of a rubber elastic body, it has a great advantage in that it does not damage the pavement road surface and can reduce the vibration to the operator, as compared with the iron scroll.

[0003]

Although the noise during traveling is considerably reduced, there is a great demand that the vibration and noise should be further improved. It is an object of the present invention to further reduce the vibration and noise of a rubber crawler having such a demand by improving the structure of a rubber lug formed on the outer peripheral surface thereof.

[0004]

The present invention has the following configuration to achieve the above object. That is, the gist of the present invention is a rubber crawler in which sprocket engagement holes are continuously provided at a constant pitch and a rubber lug is formed on an outer peripheral surface, and the rubber lug is formed of a rubber crawler with the sprocket engagement hole interposed therebetween. With a structure extending in the longitudinal direction, and
The extended rubber lug has a tip portion formed as an inclined surface in the longitudinal direction of the rubber crawler, and has a height lower than the height of the center portion of the rubber lug.

More specifically, a central portion (lateral lug) where the rubber lug extends in the lateral direction with respect to the traveling direction of the rubber crawler, and a portion extending longitudinally across the sprocket engagement hole (vertical lug). The vertical lug is formed with an inclined surface so that the height thereof is lower than that of the horizontal lug.

The inclined surface for making the extended portion of the lug in the running direction of the rubber crawler lower than the height of the central portion of the rubber lug may be flat or curved.

[0007]

The present invention has the structure as described above. In particular, the extended portion of the rubber lug in the running direction of the rubber crawler forms an inclined surface more than the central portion of the rubber lug to reduce the height. It has been lowered. For example, rubber rugs of rubber crawlers provided for traveling parts of construction machines often have so-called vertical rugs formed in places where a load is particularly applied due to the heavy weight of the body, and the rubber crawlers are composed of sprockets and idlers. At the time of wrapping around and grounding, first, the tip portion of the vertical lug is hit against the ground, and then the center portion (lateral lug) of the rubber lug comes into contact with the ground. However,
The rubber lug in a conventional rubber crawler generally has a central portion (horizontal lug) and a tip portion (vertical lug) which are uniformly flush with each other. Therefore, when the rubber crawler comes into contact with the ground while being given a curvature, as described above, the tip portion (longitudinal lug) of the rubber lug always hits the road surface.

FIG. 5 is a schematic side view showing a state where a conventional rubber crawler is grounded.
More unwound are Gomukuro - La 21 first although Gomuragu 22 formed on its outer peripheral surface so that the ground contacting 23, the traveling direction of the distal end portion (vertical lugs) 22 ₀ Gomuragu 22 during the ground Hits the ground 23, and then the entire (lateral lug) surface of the rubber lug 22 comes into contact with the ground 23.

In such a rubber crawler 21,
Gomukuro - the distal end portion 22 ₀ of Gomuragu 22 toward the running direction of La 21, with the noise caused by hitting the ground 23 is generated, and also cause a vibration due to this. Moreover, the degree is large, the wear and tear of the tip section 22 ₀ was also large this fatigue of the distal end portion 22 ₀ of Gomuragu 22 compared to the central portion 22 ₁ of Gomuragu 22.

However, according to the present invention, the height of the rubber lug is slightly lower than that of the center portion of the rubber lug with an inclined surface, and the rubber crawler is bent with a curvature. When the rubber lug touches the ground, not only the vertical lug portion of the rubber lug hits the ground, but almost the entire top surface of the rubber lug touches the ground at the same time, reducing the sound of hitting the ground and running The vibration at the time is also reduced. The difference in height between the center and the tip of the rubber lug is a maximum of 2-5m
It is sufficient to set it to about m.

[0011]

The present invention will be described in more detail with reference to the following examples. FIG. 1 is an outer plan view of a rubber lug formed on an outer peripheral surface of a rubber roller A showing a first example of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG. In FIG. 1, reference numeral 1 denotes an endless rubber elastic body which forms a base of the rubber roller A and is continuous over the top and bottom of the paper. Reference numeral 2 denotes a rubber lug formed on the outer peripheral surface of the rubber elastic body 1,
The rubber lug 2 has a lug center portion (lateral lug) 21 extending in the width direction of the rubber elastic body ₁ and a sprocket engagement hole 6.
The sandwich more becomes vertical lug 2 ₀ which is extended toward the longitudinal running direction of the rubber elastic body 1 is, and has a key-shaped planar shape as a whole. In the figure, reference numeral 3 denotes a metal core, 4 denotes a corner portion extending from the metal core 3, and 5 denotes a steel code surrounding the metal core 3.

[0012] Then, the stature of the site of the vertical lugs 2 _0,
Than tall portions of the lateral lug 2 ₁ chamfered obliquely is obtained by low stature. The present invention is for the chamfered surface of the vertical lugs 2 ₀ As this, conventional Gomukuro only small portion of Gomuragu 2 during ground contact with the earliest - unlike La, ground Sum -'s Thus, the tapping sound of the ground at this time is reduced, and the accompanying vibration is also effectively reduced.

FIG. 3 is a plan view of the outer periphery of a rubber roller D showing a second embodiment of the present invention, and FIG. 4 is a side view including a cross section taken along line BB of FIG. In this example, the rubber elastic body 11 is endlessly continuous above and below the plane of the paper, and the outer peripheral surface thereof has a lateral lug 1 extending in the width direction divided into right and left in the width direction.
2 ₁₁ , 12 ₂₁ are formed facing the sprocket engagement hole 13 at positions slightly shifted left and right. Small extension portions (vertical lugs) 12 ₁₀ , 12 ₂₀ are formed in the respective lateral lugs 12 ₁₁ , 12 ₂₁ in the opposite direction across the sprocket engagement hole 13 in the longitudinal direction of the rubber crawler D. Thus, a pair of rubber lugs 12 ₁ and 12 ₂ are formed. The overall planar shape of the rubber lug is substantially L-shaped.

However, the present invention relates to this extension (vertical lug).
12 ₁₀ and 12 ₂₀ are inclined surfaces by chamfering, and are examples in which the height (h) is reduced by a maximum of 3 mm from the height of the rubber lugs 12 ₁₁ and 12 ₂₁ . In the drawing, reference numeral 14 denotes a metal core buried in the rubber elastic body 1, reference numeral 15 denotes a corner extending from the metal core 14, and reference numeral 16 denotes a stud surrounding the metal core 14.
Reference numeral 17 denotes a central portion of the cored bar 14, which is an engagement portion with a sprocket (not shown).

[0015]

According to the present invention, there is provided a rubber crawler as described above. In grounding, a very small part of the rubber lug does not come into contact with the rubber lug. It was devised as follows. Therefore, the noise of the rubber rug hitting the ground is eliminated, and the distortion of the rubber rug is also substantially uniform, so that the vibration during running and the wear are reduced, and the improvement effect is as follows. large.

[Brief description of the drawings]

FIG. 1 is an outer peripheral plan view of a rubber crawler according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of the rubber crawler in FIG.

FIG. 3 is a plan view of the outer periphery of a rubber roller according to a second embodiment of the present invention.

FIG. 4 is a side view including a cross section taken along line BB of FIG. 3;

FIG. 5 is a schematic side view showing a state where the rubber crawler is grounded.

[Explanation of symbols]

A, D ‥‥ Gomukuro - La 1, 11 ‥‥ endless rubber elastic body 2, 12 _1, 12 ₂ ‥‥ Gomuragu 2 _1, 12 _11, 12 ₂₁ ‥‥ lug central site (lateral lug) 2 _0, 12 ₁₀ , 12 ₂₀ {Longitudinal extension of rubber crawler (longitudinal lug) 3, 14} Core 4, 15 # Corner 5, 16 # Steel code 6, 13 # Sprocket engagement hole 17 ‥‥ Sprocket engagement part h ‥‥ Difference in height between vertical lug and horizontal lug

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B62D 55/253

Claims (2)

(57) [Claims] 1. A rubber clock having sprocket engagement holes continuously provided at a constant pitch and having rubber lugs formed on an outer peripheral surface.
A rubber lug extending in a longitudinal direction of the rubber crawler with the sprocket engagement hole interposed therebetween, and a tip portion of the extended rubber lug is formed as a rubber claw.
A rubber cloth characterized by having a sloped surface in the longitudinal direction of the rubber lug and lower than the height of the center of the rubber lug.
La. 2. A rubber lug comprising a horizontal lug extending in a lateral direction with respect to a traveling direction of a rubber crawler and a vertical lug extending in a vertical direction, wherein the vertical lug is formed with an inclined surface to have a shorter height than the horizontal lug. The rubber crawler according to claim 1, wherein