JPH08198154A - Core metal of rubber crawler - Google Patents

Abstract

PURPOSE: To heighten the twisting rigidity of a rubber crawler and prevent it from counter-bending. CONSTITUTION: A core metal of a rubber crawler has a left and a right wing which are embedded in the crawler, wherein a sprocket detention part tying the wings together, a pair of horn part pinching the sprocket detention part, a pair of detent members 16, and a swell-out member 14 pinched thereby are provided in the core wing parts in such a way as embedded in a resilient material such as rubber so that adjoining cores are hindered from relative movement. A pair of detent members 16 are arranged so as to enclose the swell-out member 14 pinched thereby with the internal circumference of the rubber crawler. The arrangement further includes a recess 15 provided at the swell-out member and projections 17 formed on the detent members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core bar of a rubber crawler, and more specifically, to increase the torsional rigidity of the rubber crawler and to prevent the rubber crawler from being reversely bent.
It relates to the core metal of LA.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have come to be widely used not only for agricultural machines but also for running parts of construction and civil engineering machines. Such a rubber crawler is composed of an endless rubber elastic body, a core metal laterally arranged in the rubber elastic body and embedded in the rubber elastic body, and a sheath surrounding the core metal.
It consists of a rucode.

In the cored bar used here, generally, the center part serves as an engaging part with the sprocket, and the left and right wings of the cored part are embedded in rubber. There was no restraint at all, and each core bar had its own structure within the range in which it could move in the rubber elastic body. For example, lateral displacement of the cored bar during turning of the rubber crawler or running on a sloping ground, and swaying back and forth, up and down, and tilting when passing the rolling wheels equipped on the running machine or riding on ore. Etc. Further, in some cases, the reverse bending phenomenon of the rubber crawler is also induced.

In order to solve these problems, rubber rubber
A pair of locking members is formed on one of the cores adjacent to each other and is embedded in the rubber elastic body forming the la, and is sandwiched between the pair of locking members by the cores facing each other. It has been proposed to prevent the occurrence of lateral deviation by causing the locking member and the bulging member to interfere with each other when a force that causes lateral deviation is applied to the rubber crawler.

FIG. 1 is a plan view from the inner peripheral side of the rubber crawler in which only the core bar of the rubber crawler is taken out, and FIG. 2 shows a locking member taken along the line AA of FIG. It is sectional drawing in a bulging member site | part. The blade portion 11 of the metal core 10 ₀
A corner portion 12 that serves as a traveling surface of a rolling wheel (not shown) provided in the traveling machine body is formed in the vehicle. And the left wing portion 11
In the drawing, a pair of locking members 16, 16 is formed downward in the drawing, while a bulging member 14 is formed upward in the drawing on the right wing portion 11. A central portion between the wings 11, 11 is a sprocket engaging portion 13.

[0006] Then, the metal core 1 adjacent to the metal core 10 ₀
0 _1, 10 in the _two-core metal 10 and the protruding member 14 fitted in the pair of locking members 16, 16 formed in the _0, a pair of engaging members formed so as to sandwich the protruding member 14 16 , 16
It is provided with. That is, adjacent cores 10 ₂ , 10
_0, in the 10 _1, protruding member 14 in the left-right alternating wings 11 are upwardly formed, and the structure in which a pair of engaging members 16, 16 is formed downward contrary to sandwich the protruding member 14 Has become. Therefore, when a lateral force is applied to the rubber crawler, that is, when the core bar is laterally displaced, the locking members 16 and 16 and the swelling member 14 interfere with each other to prevent movement. The feature is that the function to prevent lateral deviation is exhibited.

[0007]

However, when the rubber crawler is twisted, as shown in FIG. 2, the pair of locking members 16, 16 and the bulging member 14 sandwiched between them.
Means that the bulging member 14 moves out from above between the locking members 16 and 16 upward or downward relative to each other as shown by the dotted line, and these do not interfere with each other. Therefore,
This improved core bar does not have the function of preventing twisting. This has the drawback that it is not possible to prevent the occurrence of reverse bending of the rubber crawler that occurs when riding on ore or the like.

The core bar of the rubber crawler of the present invention has been made in view of the above circumstances, and the purpose thereof is, of course, to prevent the lateral displacement of the core bar embedded in the rubber crawler. The present invention provides a cored bar that effectively prevents twisting and reverse bending of a rubber crawler.

[0009]

The present invention has the following constitution in order to achieve the above object. That is, the left and right wing portions embedded in the rubber crawler, the sprocket engaging portion connecting the wing portions, the pair of corner portions sandwiching the sprocket engaging portion, and the pair of locking members are sandwiched between them. A core bar of a rubber crawler formed by forming a bulge member on each wing portion of the core bar and being embedded in a rubber elastic body so as to prevent movement between adjacent core bars. The present invention relates to a core bar of a rubber crawler, characterized in that a bulging member sandwiched between the members is covered with an inner peripheral side of the rubber crawler.

At least one side of the pair of locking members facing each other on the inner peripheral side of the rubber crawler is provided with a projecting portion on the facing surface side, and the bulging member is provided on the inner peripheral side of the rubber crawler. The shape is a cover, and preferably, the protruding portion of the locking member is formed with a recessed portion in the bulging member.

[0011]

According to the present invention, as described above, the bulging member is sandwiched between the engaging members of the adjacent cores embedded in the rubber elastic body, and the bulging member is engaged in this engagement. When the rubber crawler moves to the inner peripheral side, the projecting portion of the locking member interferes with this. Therefore, the rubber
The lateral displacement of the core metal caused by the force applied in the lateral direction of the rubber claw is prevented, and in the twisting phenomenon of the rubber crawler, for example, the mutual bending of the metal claw may cause the reverse bending of the rubber crawler. It also has a structure to prevent
With this, it is possible to reduce the occurrence of derailment between the rubber crawler and the rolling wheels, sprockets and the like.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The core bar of the rubber crawler of the present invention will be described in more detail with reference to the drawings. 3 is a plan view showing one core metal A constituting the present invention, FIG. 4 is a front view thereof, FIG. 5 is a side view thereof, and FIG. 3 is from the inner peripheral side of the rubber crawler. In the figure, the core metal A is the left and right wings 11, 11.
And a central portion 13 that connects them and a pair of corner portions 1 that sandwich the same.
It consists of 2 and 12. The corners 12 and 12 are examples in which the left corner 12 projects downward and the right corner 12 projects upward. The corners 12 and 12 serve as running parts of unillustrated rolling wheels provided in the running machine body. Further, the wing portions 11, 11 are portions embedded in the rubber elastic body forming the rubber crawler, and the central portion 13 connecting them is an engaging portion with a sprocket (not shown).

Now, the left wing portion 11 is formed with the bulging member 14 outwardly of the corner portion 12 and upward, while the right wing portion 11 is similarly provided with the downward bulging member 14. It was formed. The bulging member 14 has a substantially trapezoidal shape in which recesses 15 are formed on the inner peripheral side of the rubber crawler.

The dimensions of the cored bar are arbitrarily determined according to the size of the rubber crawler used. In this example, the cored bar has a width W ₀ of 360 mm, a length L ₀ of 45 mm, and a corner portion. The height H _{0 of} 12 is 23 mm, the length L ₁ of the swelling member 14 from the wing portion 11 is 28 mm, the inner peripheral side width W ₁ of the rubber crawler is 14 mm, and the outer peripheral side width W ₂ is 20 mm. , Thickness T ₁ was 15 mm.

FIG. 6 is a plan view of the core metal B on the other side which is used as a pair with the core metal A, and FIG. 7 is a front view thereof.
FIG. 8 is a side view. In the figure, a core metal B is composed of left and right wing portions 21, 21, a sprocket engaging portion 23 which is a central portion connecting the wing portions 21, and a pair of corner portions 22, 22 sandwiching the sprocket engaging portion 23. The corners 22, 22 are the left corner 22
Is an example in which the lower side and the right side corner portion 22 are protruded in the upper side. The wing portions 21, 21 are portions embedded in a rubber elastic body forming a rubber crawler, and a connecting portion 23 thereof is an engaging portion with a sprocket (not shown). or,
The corners 22 and 22 serve as running portions of rolling wheels (not shown) provided in the running machine body.

The left wing portion 21 has locking members 16 and 16 formed directly below and outside the corner portion 22 downward, and the right wing portion 11 similarly has the locking member 1 upwardly directed.
6 and 16 are formed. The locking members 16 and 16 are the protrusions 1 facing the inner peripheral side of the rubber crawler.
7 is formed, and thus this portion has a swollen shape. The space between the locking members 16 and 16 is sufficient for the bulging member 14 of the core metal to fit therein.
The external dimensions of the locking member 16 are such that the length L ₂ is 28 m.
m, the outer peripheral width W ₃ was 20 mm, and the thickness T ₂ was 15 mm.

FIG. 9 is a view when the locking members 16 and 16 of the cores A and B and the bulging member 14 are fitted to each other as shown in FIG.
It is an expanded sectional view of a position similar to. The gap between them is 1.5 mm in this example.
In this example, when the core metal A or the core metal B is tilted, the bulging member 14 is tilted to the position of the dotted line, and here, the recessed portion 15 of either the left or right bulging member 14 and the protruding portion of the locking member 16 are provided. 17
Interfere with and their movements are restricted.

FIG. 10 is an enlarged sectional view of the locking members 16 and 16 of the cores A and B and the bulging member 14 when they are fitted to each other. The gap between the two is 1.5 mm, and the locking member 16
The projecting portion 17 and the recessed portion 15 of the swelling member 14 are inclined surfaces facing each other, and the inclined surfaces are shaped so as to overlap each other. When the cored bar A or B is tilted, the tilted surfaces interfere with each other as shown by the dotted line and the movement thereof is restricted. The length and the inclination angle of the inclined surface are arbitrarily selected depending on the size of the core metal used. Needless to say, the swelling member may simply have a rectangular sectional shape.

In the present invention, the relationship between the engaging member and the bulging member of the cores A and B which are embedded in the rubber crawler and adjacent to each other is not limited to the above. , For example, one of the pair of locking members,
The bulging member may interfere with each other when twisting occurs. That is, it is an enlarged cross-sectional view in FIG. 11 when the locking members 16 and 16 of the cores A and B and the bulging member 14 are fitted together in still another example. In this example, the protruding portion 17 is formed only on one side of the locking member 16, and the recessed portion 15 is formed on one side of the bulging member 14 so as to face the protruding portion 17, and when the cored bar is tilted. The protruding portion 17 and the recessed portion 15 interfere with each other.
Incidentally, the sectional shape of the bulging member may also be a square sectional shape as shown by a dotted line in this case as well.

FIG. 12 shows a modification of the cored bar in FIG. 11, in which the left locking member 16 and the bulging member 1 are provided.
4 is similar to that shown in FIG. 11, but the relationship between the right locking member 16 and the bulging member 14 is that the protruding portion 17 and the recessed portion 15 are formed relative to this. is there. In this case, when twisting or the like occurs in the core metal, the bulging member 14 and the locking members 16, 16 on at least one side interfere with each other regardless of the twisting on either side. It is possible to regulate and prevent the occurrence of twist. As described above, the geometrical relationship between the locking member 16 and the bulging member 14 is not particularly limited, and the object of the present invention is achieved if the interference relationship between the two is maintained. .

FIG. 13 shows a core bar A of the rubber crawler of the present invention.
It is a top view from the inner peripheral side of the rubber crawler which shows the 2nd example of B. In this example, one core metal A has the left and right wings 1
In this example, the swelling members 14 are formed on the first and the first halves 11 respectively, and on the other core metal B, the pair of locking members 16 and 16 are formed corresponding to the swelling members 14. Of course, it goes without saying that the fitting relationship between the locking members 16 and 16 and the bulging member 14 maintains the same relationship as in the above-described examples. Although the corners are omitted in the cores A and B in FIG. 13, it is a matter of course that a part of the corners may be a part of the locking member 16 as in the previous example. The same applies to the corners described later.

FIG. 14 further shows FIG. 13 showing a third example of the present invention.
It is a top view similar to. In this example, the cores A and B
Have the same shape, and in the illustrated example, a bulging member 14 is formed upward on the wing portion 11, and a pair of locking members 16, 16 is provided downward on the other side of the wing portion 11. is there.

FIG. 15 is a similar plan view showing a fourth embodiment of the present invention, in which cores A and B have the same shape. And as can be seen in the figure, the left and right wings 11, 11
The locking members 16, 16 and the bulging member 14 are formed on the upper and lower edges of the.

[0024]

As described above, in the core bar of the rubber crawler of the present invention, the structure in which the locking member and the bulging member interfere not only when they are laterally displaced but also when they are twisted Has become. Therefore, the occurrence of derailment between the rubber crawler and the core bar or sprocket is significantly reduced.

[Brief description of drawings]

FIG. 1 is a plan view from the inner peripheral side of a rubber crawler of a cored bar used in a conventional rubber crawler.

FIG. 2 is a cross-sectional view of the locking member and the bulging member taken along the line AA of FIG.

FIG. 3 is a plan view from the inner peripheral side of the rubber crawler showing the cored bar A on one side of the first example of the present invention.

FIG. 4 is a front view of a core metal A in FIG.

FIG. 5 is a side view of the core metal A in FIG.

FIG. 6 is a plan view from the inner peripheral side of a rubber crawler showing a cored bar B on the other side of the first example of the present invention.

FIG. 7 is a front view of the core metal B in FIG.

FIG. 8 is a side view of the core metal B in FIG.

FIG. 9 is an enlarged cross-sectional view showing the relationship between the locking member and the swelling member in the cores A and B.

FIG. 10 is an enlarged cross-sectional view of another example of the locking member and the swelling member.

FIG. 11 is an enlarged cross-sectional view of still another example of the locking member and the swelling member.

FIG. 12 is an enlarged cross-sectional view showing a modified example of the locking member and the swelling member of FIG. 11.

FIG. 13 is a plan view of the core bars A and B of the second example of the present invention from the inner peripheral side of the rubber crawlers.

FIG. 14 is a plan view of the core bars A and B of the third example of the present invention from the inner peripheral side of the rubber crawlers.

FIG. 15 is a plan view of the core bars A and B of the fourth example of the present invention from the inner peripheral side of the rubber crawlers.

[Explanation of symbols]

 A, B ... Mandrel of the present invention, 11, 21 ... Wings of cores A, B, 12, 22 ... Corners, 13, 23 ... Central part for connecting the wings, 14 ... Wing A bulging member protruding from the edge of the wing portion, 15 ... A recess formed in the bulging member, 16 ... A locking member protruding from the edge of the wing, 17 ... A protruding portion formed in the locking member.

Claims (3)

[Claims] 1. Right and left wing portions embedded in a rubber crawler, sprocket engaging portions connecting the wing portions, a pair of corner portions sandwiching the sprocket engaging portions, and a pair of locking members, A core bar of a rubber crawler formed by forming a swelling member sandwiched between them in a wing portion of each core bar and being embedded in a rubber elastic body to prevent movement between adjacent core bars, A rubber claw characterized in that a bulging member sandwiched between a pair of locking members is covered with an inner peripheral side of the rubber crawler.
La core metal. 2. The core bar of a rubber crawler according to claim 1, wherein a protrusion is formed on the facing surface side of at least one side of the pair of locking members facing each other on the inner peripheral side of the rubber crawler. 3. The core bar of a rubber crawler according to claim 2, wherein the bulging member is formed with a recessed portion with respect to the protruding portion of the locking member.