JPH07291157A - Rubber crawler belt - Google Patents

Abstract

PURPOSE:To reduce the breakage and the weight of the rubber belt of a crawler type vehicle which is constituted so that core metals are arranged in an equal interval, in an endless strip-shaped rubber belt and formed integrally. CONSTITUTION:As for a rubber belt 1, a wide width core metal A10 and a narrow width core metal B20 are alternately arranged in parallel, and embedded in an equal interval. The P part of the rubber belt 1 on the side part of the narrow width core metal B20 possesses flexibility in the vertical direction. On a soft ground, the actual use is not obstructed, even if the P part exists. When the P part rides over a stone, etc., the rubber belt 1 deflects, and the generation of crack is prevented. Since the P parts exist in an equal interval at both the end parts of the rubber belt, on every other core metals 1, the frequency of the generation of cracks is reduced by half, and since the weight of the core metal B20 is reduced, the weight of the rubber belt can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler track for a tracked vehicle in which endless, belt-shaped rubber belts are embedded in parallel with each other and are embedded at equal intervals.

[0002]

2. Description of the Related Art FIG. 8 is a plan view of a conventional rubber track of a tracked vehicle, and FIG. 9 is a sectional view taken along line CC of FIG.

A metal core 50 is embedded in parallel with the endless and annular rubber belt 1 at equal intervals. The cored bar 50 has wings 51 on the left and right, and the width W1 of the cored bar 50 has a size sufficient to ensure the strength of the width of the rubber belt that secures a low ground contact pressure. A pair of left and right protrusions 52, 5 arranged in series in the longitudinal direction at a constant height from the inner peripheral surface of the rubber belt 1 to the inside (N side).
3 and the intermediate portion thereof forms a meshing portion 54 with the sprocket. The top surfaces of the protrusions 52 and 53 are rolling surfaces of the rolling wheels. The length L1 of the protrusion 52 in the longitudinal direction is longer than the length L2 of the protrusion 53 in the longitudinal direction. Therefore,
The cored bars 50 are alternately arranged in a laterally inverted manner, and the rolling portions are smoothed by shifting the intermittent positions of the protrusions 52 and 53 in the longitudinal direction. Below the cored bar 50, a plurality of annular wires 2 are embedded as strength members in the pulling direction. 3 is a rug.

FIG. 10 is a side view of a portion in which a long-pitch type rubber crawler belt is mounted on a sprocket 4, and a cored bar 50 is arranged at intervals of one tooth with respect to the teeth of the sprocket 4 and has a meshing portion. 54 is engaged with the sprocket 4.

[0005]

However, in the above configuration, as shown in FIG. 10, the teeth of the sprocket 4 are meshed with each other one by one, so that the winding angle θ is large and the interval between the lugs 3 is wide. Therefore, there is a problem that vibration during traveling is large.

In order to solve this problem, as shown in FIG. 11, a short pitch type in which a cored bar 50 is arranged for each tooth of the sprocket 4 has been devised. In this case, the wrap angle is θ / 2 and the lug 3 is also provided continuously,
Little vibration. However, since the number of cores is doubled, there is a problem that the weight of the rubber crawler belt becomes heavy.

Further, when one side is climbed up on a rock or the like while traveling as shown in FIG. 12, there is no escape area between the wing portion 51 of the core metal 50 and the rubber sandwiched between the rocks, so that the X portion of the lug 3 is present. There is a problem that cracks occur in the. In the figure, 5 is a rolling wheel.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a rubber crawler belt which is light in weight and in which lugs are less likely to crack.

[0009]

To achieve the above object, in a rubber crawler belt according to the present invention, a core metal is embedded in a rubber belt, and the core metal has a pair of left and right protrusions in the longitudinal direction. Is a rubber track whose top surface is the rolling surface of the rolling wheel,
The metal cores A and B having different lengths are provided at equal intervals in the longitudinal direction of the rubber belt.

Further, in the above construction, one side of the pair of protrusions is long in the longitudinal direction and the other side is short, and the core metal A is provided with wing portions having a long length in the width direction on the left and right sides, and the pair of protrusions. One side of the portion is short in the longitudinal direction, the other side is long, and a cored bar B having wing portions with short widthwise lengths is alternately arranged on both left and right sides.

Further, in the above structure, the core metal A and
The cored bar B and the cored bar B whose right and left are inverted are continuously provided, and the cored bar A is horizontally reversed and provided continuously, and the cored bar B is
The cored bar B is horizontally inverted and continuously provided, and this is sequentially and repeatedly provided continuously.

Further, in the above-mentioned structure, the core metal C in which the pair of protrusions are long in the longitudinal direction and have wing portions on both left and right sides.
And a pair of the protrusions that are short in the longitudinal direction and have a wing portion on only one side, and the cored bar D that is laterally inverted and serially arranged, and is sequentially and repeatedly arranged. is there.

Further, in the above structure, the core C having the pair of protrusions elongated in the longitudinal direction and having wing portions on both left and right sides.
And, the pair of protrusions are short in the longitudinal direction, the core metal D having a wing portion on only one side, the core metal C, and the core metal D are laterally inverted and continuously arranged, and these are sequentially repeated. It was installed in series.

Further, in the above structure, the core metal B having the wing portions having a short width in the left and right sides and the core metal D having the wing portions only on one side are made of a polymer material. It was done.

[0015]

According to the above construction, the metal core having the blade portions in the width direction is embedded in the endless belt-shaped rubber belt in parallel in the longitudinal direction at equal intervals to form the rubber crawler belt, and the blade portions of the adjacent metal bars are formed. The length in the width direction is different. That is, the core metal A having a long width in the left and right wings and the core metal B having a short width in the width of the left and right wings are alternately arranged, or the core metal A
And two cores B are successively and consecutively arranged, so that the left and right ends of the rubber belt of the core B of the short blade have flexibility in the vertical direction, so that the lug when riding on rocks or the like It can prevent cracks. Also, the weight of the core metal B is reduced,
The weight of the rubber track is reduced.

Further, a cored bar C having a long width in the left and right wings, a cored bar D having wings on only one side, and a left and right reversed cored bar D may be sequentially and repeatedly connected. Alternatively, the cored bar C, the cored bar D, the cored bar C, and the left and right inverted cored bar D
Since the rubber belt in the portion of the cored bar D where there is no wing has flexibility in the vertical direction, the cracks of the lugs when riding on rocks or the like can be prevented. Also,
The weight of the core metal D is reduced, and the weight of the rubber crawler belt is reduced.

Furthermore, since the core metal B having a short width in the width direction of the left and right wings and the core metal D having the wings on only one side are made of a polymer material, the weight can be further reduced.

[0018]

Embodiments of the rubber crawler belt according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view of a first embodiment of a rubber crawler belt, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG.

Next, the structure of the rubber crawler belt will be described. The annular rubber belt 1 has a width W1 to the left and right.
Core metal A (10) having a sufficiently long blade portion 11 and a core metal B (2) having right and left blade portions 21 having a short width W2 in the width direction.
0) are alternately embedded in parallel and embedded at equal intervals. Core A
In (10), a pair of left and right protrusions 12 and 13 are provided at a constant height on the inner side (N side) of the inner peripheral surface of the rubber belt 1, and the rolling surface of the rolling wheels of the tracked vehicle is provided. Are configured. The length L1 of the protrusion 12 in the longitudinal direction is longer than the length L2 of the protrusion 13 in the longitudinal direction. The core metal B (20) is also provided with a pair of left and right protrusions 22 and 23, and the length L1 of the protrusion 22 on one side in the longitudinal direction is the length L1 of the protrusion 23 on the other side in the longitudinal direction. Shorter. Core A (10) and Core B (2
The intermediate portions 14 and 24 of the pair of protrusions (0) are meshing portions that mesh with the sprocket 4. Below the core metal A (10) and the core metal B (20), a plurality of wires 2 are embedded as strength members in the pulling direction. 3 is a rug.

Next, the operation will be described. This configuration is a short pitch type, and there is little vibration during running. Moreover, the weight of the crawler belt is reduced because every other core metal B (20) having a short wing portion is contained therein. Also, the core metal B (2
The P portion beside 0) has flexibility in the vertical direction because it is made of only rubber, but there is no practical problem in soft ground. On the other hand, on a hard road surface, for example, as shown in FIG. 4, when the end portion of the core metal B20 of the rubber crawler rides on a rock or the like, the lug 3 bends, and thus cracks do not occur. Since the P portions shown by 1 are present at equal intervals on the left and right ends of the rubber belt 1 every other core metal, the frequency of cracks occurring in the lug 3 is halved. In the figure, 5 is a rolling wheel.

FIG. 5 is a plan view of the second embodiment of the rubber crawler belt. The rubber belt 1 has the above-mentioned core metal A (10) and core metal B.
(20) and a horizontally-reversed core metal B (20) are continuously provided, and then a horizontally-reversed core metal A (10), a horizontally-reversed core metal B (20), and a core metal B (20). ), And the rubber crawler belt is formed by successively repeating this. Therefore, the flexible P portions are formed at equal intervals. Since the effect is the same as that of the first embodiment, the description is omitted.

FIG. 6 is a plan view of the third embodiment of the rubber crawler belt, which has a pair of protrusions 32 having wings 31 on the left and right, a length W1 in the width direction and a length L1 in the length direction. A cored bar C (30) provided, and a cored bar D (40) having a wing portion 41 on only one side and a short protrusion 42 having a length L2 in the longitudinal direction,
The mandrel D (40) that has been reversed right and left is sequentially and repeatedly provided to form a rubber crawler belt, and a flexible P portion is formed. Since the effect is the same as that of the first embodiment, the description is omitted.

FIG. 7 is a plan view of the fourth embodiment of the rubber crawler belt. The core metal C (30), the core metal D (40), the core metal C (30), and the metal core reversed left and right as shown in FIG. D (40) and
The rubber crawler belt is repeatedly formed in series to form a flexible P portion. Since the effect is the same as that of the first embodiment, the description is omitted.

Since the core metal B (20) and the core metal D (40) described in the first to fourth embodiments have short widths and small loads, they are made of rubber, Further weight reduction can be achieved by using a polymer material such as urethane.

[0026]

As described above in detail, according to the present invention, the cored bar having the blade portions in the width direction is embedded in the endless belt-shaped rubber belts arranged in parallel in the longitudinal direction at equal intervals and is integrated into a tracked vehicle. Adjacent cores of the rubber crawler belt have different widths in the width direction of the wings, and in the first embodiment, a core A having wings with long widths on both the left and right sides; Since the core metal B having a short length in the width direction on both the left and right sides is alternately arranged, or the core metal A and two core metals B are sequentially and repeatedly arranged.
Vertically flexible parts can be formed on both left and right ends of the rubber belt at equal intervals.Therefore, when the end of the rubber crawler rides on rocks, etc., the frequency of cracks on the lug is greatly reduced. And the weight can be reduced.

Further, a core metal C having wings on both left and right sides,
Mandrel D with wings on only one side, and mandrel D with left-right reversal
And the core metal C, the core metal D, the core metal C, and the left and right inverted metal core D are sequentially and repeatedly arranged. Therefore, the portions having flexibility in the vertical direction can be formed at the left and right ends of the rubber belt at equal intervals, the frequency of lug cracking can be reduced, and the weight can be reduced.

Further, since the core metal B and the core metal D are made of a polymer material, a rubber crawler belt having a further reduced weight can be obtained.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an explanatory view of the effect of the rubber crawler track of the present invention when climbing over rocks.

FIG. 5 is a plan view of a second embodiment of the rubber crawler belt of the present invention.

FIG. 6 is a plan view of a third embodiment of the rubber crawler belt of the present invention.

FIG. 7 is a plan view of a fourth embodiment of the rubber crawler belt of the present invention.

FIG. 8 is a plan view of a conventional rubber crawler belt.

9 is a cross-sectional view taken along line CC of FIG.

FIG. 10 is a side view of a sprocket mounting portion of a long pitch type rubber crawler belt.

FIG. 11 is a side view of a sprocket mounting portion of a short pitch type rubber crawler belt.

FIG. 12 is an explanatory view of a situation when a conventional rubber crawler is over a rock.

[Explanation of symbols]

1 ... rubber belt, 10 ... core metal A, 20 ... core metal B,
30 ... Mandrel C, 40 ... Mandrel D, 11, 21, 31,
41 ... Wings, 12, 13, 22, 23, 32, 42 ...
‥protrusion.

Claims (6)

[Claims] 1. A rubber belt having a cored bar embedded therein, the cored bar having a pair of left and right protrusions in a longitudinal direction, and the protrusion has a long surface in a rubber crawler belt whose rolling surface is a rolling surface of a rolling wheel. A rubber crawler track characterized in that cored bars A and B having different heights are provided at equal intervals in the longitudinal direction of a rubber belt. 2. A core metal A having a pair of protrusions, one side being long in the longitudinal direction, the other side being short, and the left and right sides having long blades in the width direction, and one side of the pair of protrusions. 2. The rubber crawler belt according to claim 1, wherein a cored bar B, which is short in the longitudinal direction, long on the other side, and has wing portions having a short widthwise direction, is continuously provided on both left and right sides. 3. A core metal A having a pair of protrusions, one side being long in the longitudinal direction, the other side being short, and the left and right sides having long blades in the width direction, and one side of the pair of protrusions. The mandrel B having wings that are short in the longitudinal direction, long on the other side, and short on the left and right sides in the width direction, and the mandrel B are laterally inverted and continuously installed. 2. The rubber crawler track according to claim 1, wherein the cored bar B and the cored bar B are laterally reversed and serially arranged, and these are sequentially and repeatedly arranged. 4. A core metal C having a pair of protrusions long in the longitudinal direction and having wing portions on both left and right sides, and a core metal C having the pair of protrusions short in the longitudinal direction and having a wing portion only on one side. 2. The rubber crawler belt according to claim 1, wherein D and the cored bar D are laterally inverted and continuously provided, and this is sequentially and repeatedly provided. 5. A core metal C having a pair of protrusions long in the longitudinal direction and having wing portions on both left and right sides, and a core metal C having the pair of protrusions short in the longitudinal direction and having a wing portion only on one side. The rubber crawler belt according to claim 1, wherein D, the core bar C, and the core bar D are horizontally inverted and continuously provided, and these are sequentially and repeatedly provided continuously. 6. A core metal B having wing portions having a short width in the left and right sides, and a core metal D having wing portions only on one side.
The rubber crawler according to any one of claims 2 to 5, wherein the rubber crawler is made of a polymer material.