JPH08282551A - Structure for rubber crawler improved in performance against dislocation from wheel - Google Patents

Abstract

PURPOSE: To prevent the occurrence of dislocation from a wheel by forming a recessed section at least at the root section of an auxiliary angular section out of rubber elastic members located between the auxiliary angular section and a main angular section, and thereby deeply engaging the auxiliary angular section with an outer rolling wheel. CONSTITUTION: A continuous recessed section 25 is formed at the root of the auxiliary angular section 24 of a rubber elastic member 110 . When a vehicle is running over an incline plane, the outer peripheral section of an outer rolling wheel 30 which is in contact with the inner circumfremtial surface of a rubber crawler 10, is deeply engaged with the recessed section 25 formed at the root of the auxiliary angular section 24 in such a way as to go down to the bottom. Besides, a recessed section may be formed at the wing section 21 of a core metal 20. Therefore, the deeper cut into the recessed section by the outer peripheral section of the wheel body of the outer rolling wheel is much subject to the deeper engagement or the auxiliary angular section with the outer rolling wheel where the outer rolling wheel approaches in position close to the core metal, and the occurrence of dislocation from the wheel can thereby be prevented.

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 a structure of a rubber crawler having improved derailing performance.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have been widely used in running parts of various machines, and ordinary rubber crawlers have a cored bar embedded in an endless rubber elastic body at a constant pitch. A steel cord is wrapped around the wall. A rubber lug is provided on the outer peripheral side of the rubber elastic body, and a pair of main corners is projected from the core on the inner peripheral side.The so-called outer wheel provided on the machine rolls over the main corners. By engaging with both of them, it is possible to prevent the rubber crawler from slipping off.

However, when the vehicle is running on a sloping ground or when it is turning, the core metal is largely displaced laterally in the rubber elastic body, and if the running is further continued in this state, the main corner portion and the outer wheel are rotated. The disengagement with the so-called wheel slip occurs, which makes traveling impossible. In particular, the rubber crawlers used for the running parts of construction machines and civil engineering work machines are extremely heavy, and therefore it is not easy to refit the derailed rubber crawlers to their original positions.

Japanese Utility Model Publication No. 50-99628 and Japanese Patent Laid-Open No.
Japanese Patent Laid-Open No. 5-87667 proposes a rubber crawler and a cored bar for preventing the derailment. The technology proposed here forms auxiliary corners further outside than the pair of main corners formed on the core metal, and the wheel of the outer wheel fits in between these corners and rolls. It is designed so as to prevent the wheels from being derailed when the vehicle is running on a sloping ground as described above.

FIG. 4 shows a rubber structure having a conventional structure.
This shows the relationship between LA and the outer wheel. Rubber crawler 1
In No. 0, the cored bar 20 is embedded in the rubber elastic body 11 with a constant pitch, and mainly the left and right wings 21, 2
1 is embedded in the rubber elastic body 11, the center of the cored bar 20 is an engaging portion 22 with the sprocket, and the engaging portion 22 is sandwiched between the pair of main corner portions 23, 23 to the wing portions 21, 21. Be prepared. On the other hand, the outer wheel 30 has a pair of main corners 2
Ring bodies 31, 31 are formed across 3, 23, and these ring bodies 31, 31 roll on the inner peripheral surface of the rubber crawler 10. However, as shown in FIG. 4, the rubber crawler 10 and the outer wheel 3 are used when traveling on an inclined surface or riding on a small stone.
As a result, the main corner portion 23 and the wheel body 31 are disengaged from each other as shown in the figure, and if the running is continued in this state, the rubber crawler 10 will derail. .

For this reason, in the above-mentioned invention, as shown in FIG. 5, auxiliary corner portions 24, 24 are formed on the cored bar 20 so as to project from the inner peripheral surface of the rubber crawler 10 and the outer rotation is performed. Even when the wheel 20 and the rubber crawler 10 are relatively separated from each other and the main corners 23, 23 are separated from the wheel body 31, the outer edge portion 31 _{0 of the} wheel body 31 is separated from the auxiliary corner portion 24. The engagement is not disengaged, and therefore, the engagement between the outer wheel 30 and the auxiliary corner portion 24 is not disengaged, and the occurrence of wheel disengagement is reduced.

However, in the existing invention as shown in FIG. 5, in general, the higher the height of the auxiliary corner portion, the better the engagement with the abduction wheel and the better the prevention of wheel removal.
In particular, when the core metal is made by forging, the number of forging steps is increased and the cost is increased. Further, when casting is used, there is no problem in the manufacturing process, but an increase in the weight of the core metal is unavoidable, which also causes an increase in cost. Therefore, the auxiliary corner portion of the rubber crawler is required to be as low and small as possible, but if the auxiliary corner portion becomes smaller than the limit, engagement with the outer wheel will not be sufficient, resulting in deterioration of wheel releasing performance. .

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks, and an object of the present invention is to provide a structure of a rubber crawler in which the auxiliary corner portion is made as low as possible, but the derailing performance is improved. To do.

[0009]

The present invention has been made to achieve the above object, and its gist is to provide a cored bar embedded in an endless rubber elastic body at a constant pitch,
A pair of main corners extending from the core and a sprocket engaging hole formed between the cores and a tension body surrounding the core and an auxiliary extending outside the core to the left and right outside of the main corners. A rubber crawler structure having a corner portion, wherein a rubber elastic body existing between the auxiliary corner portion and the main corner portion is provided with a recessed portion at least at the base of the auxiliary corner portion to improve wheel release performance. The auxiliary corner portion may extend from the cored bar, and the recess may be continuous in the longitudinal direction of the rubber elastic body.

[0010]

In the rubber crawler of the invention shown in FIG. 5,
Rubber 11 ₀ between the auxiliary corner 24 and the main corners 23, Gomukuro - certain degree or more in order to ensure the durability of La can not be thin, substantially the height H ₀ of the for auxiliary corner 24 falling back to the ones actually lower by the thickness t min of the rubber 11 ₀ than the height H were common in.

However, in the structure of the rubber crawler of the present invention, the recessed portion is formed in advance at the base of the auxiliary corner portion 24. For this reason, the outer edge portion of the wheel body 31 of the outer wheel 30 enters into the recessed portion, and the outer wheel 30 is correspondingly moved by this amount.
The position of is substantially close to the cored bar 20, and the engagement between the auxiliary corner portion 24 and the outer rotating wheel 30 is deepened by that much, so that the removal of the wheel is prevented. This recess is formed at least at the base of the auxiliary corner 24 on the main corner 23 side, and it goes without saying that this may be an independent recess or a continuous recess. Further, the cross-sectional shape of the recessed portion in the width direction of the rubber crawler may be V-shaped, circular, or trapezoidal. The opening width W of this recess is
About 1/5 to 1 / of the width W ₀ between the main corner portion 23 and the auxiliary corner portion 24
2, preferably 1/4 to 1/3,
If the width W ₀ is set too wide, the rubber elastic body 1 in this portion
The deterioration of No. 1 is accelerated and the life of the rubber crawler 10 is shortened.

[0012]

The present invention will now be described in more detail with reference to the drawings. FIG. 1 is a plan view of a rubber crawler 10 of the present invention, and FIG.
Is a sectional view in the width direction, and FIG. 3 is a partially enlarged sectional view thereof. In the figure, 11 is a rubber elastic body forming the rubber crawler 10 and is continuous in the front and back direction of the paper surface. 12 is a rubber rug. Reference numeral 20 is a cored bar embedded in the rubber elastic body 11 at a constant pitch in the longitudinal direction. The cored bar 20 is embedded in the rubber elastic body 11 and is provided on the left and right wings 2.
1. Engagement portion 22 of the sprocket in the central portion
And a pair of main corner portions 23, 23 sandwiching the engagement portion 22.
Are formed. Further, auxiliary corner portions 24, 24 extending from the blade portions 21, 21 are formed on the left and right sides of the main corner portions 23, 23, and these corner portions 23, 24 project inward from the inner peripheral surface of the rubber crawler 10. Is. Rubber elastic body 11
Is intended to cover the inner peripheral surface between the corner portions 23 and 24, the rubber elastic body 11 ₀ on the outer rolling wheel 30 is able to roll.

[0013] The present invention is obtained by forming the rubber elastic body 11 ₀ recessed portion 25 continuous to the root of the auxiliary corners 24 at. In this example, the recess 25 has a V-shaped cross section. The wheel 30 shown by the dotted line is an example in which one of the outer wheels 30 is lifted up when the wheel 30 is used for traveling on a sloping ground or the like. That is, as shown particularly in FIG.
The outer edge portion 31 of the outer wheel 30 that is in contact with the inner peripheral surface of the rotor 10.
_{The reference numeral 0} indicates that the recessed portion 25 formed at the base of the auxiliary corner portion 24 is inserted into the recessed portion 25 so as to be engaged with the recessed portion 25, and that the effect of reducing the derailment is remarkable. Although not shown, it is possible to form a recess in the blade portion 21 of the cored bar 20 corresponding to the recess 25. In the figure, 26 is a steel code.

[0014]

The structure of the rubber crawler of the present invention is formed by forming a recess at the base of the auxiliary corner portion, and the outer edge of the wheel body of the abduction wheel enters into this recess, and the outer rotation portion corresponds to this amount. The position of the wheel comes close to the core metal and the engagement between the auxiliary corner portion and the outer wheel is deepened to prevent the wheel from falling off.

[Brief description of drawings]

FIG. 1 is a plan view of a rubber crawler of the present invention.

2 is a cross-sectional view in the width direction of the rubber crawler of FIG.

FIG. 3 is a partially enlarged sectional view of FIG.

FIG. 4 is a sectional view of a conventional rubber crawler.

FIG. 5 is a cross-sectional view of a rubber crawler disclosed in Japanese Utility Model Publication No. 50-99628.

[Explanation of symbols]

10 ‥‥ Gomukuro - la, 11 ‥‥ rubber elastic body, the rubber elastic body between 11 ₀ ‥‥ corners, 12 ‥‥ Gomuragu, 20 ‥‥ metal core, 21 ‥‥ wings, of 22 ‥‥ sprocket engagement Holes, 23, main corners, 24, auxiliary corners, 25, recesses, 26, steel cord, 30, outer wheel, 31, wheel, t, rubber elastic body 11 Thickness of ₀ , H ... height of auxiliary corner, H ₀ ... height of auxiliary corner from inner peripheral surface of rubber, W ... width of recess, W ₀ ... width between corners.

Claims (3)

[Claims] 1. A core metal embedded in an endless rubber elastic body at a constant pitch, a tensile body surrounding the core metal, and a sprocket engaging hole formed between the core metals. A structure of a rubber crawler in which a pair of main corners extending from the core bar and auxiliary corners extending from the core bar on the left and right outer sides of the main corners are formed, and a rubber elastic body existing between the auxiliary corners and the main corners. The structure of the rubber crawler having improved derailing performance, characterized in that a recess is formed at least at the base of the auxiliary corner. 2. The structure of the rubber crawler according to claim 1, wherein the auxiliary corner portion is a corner portion extending from the cored bar. 3. The structure of the rubber crawler according to claim 1, wherein the recess is continuous in the longitudinal direction of the rubber elastic body.