JPH11334657A - Elastic crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-weight elastic crawler with improved traveling performance in which vibrations are reduced and abrasion is prevented. SOLUTION: In an elastic crawler 1, a traveling rug 3 made of an elastic material such as rubber is integrally projected on the ground plane of a belt body 2 made of an elastic material such as rubber. The traveling rug 3 is rolled out from the width center of the belt body 2 to the left and right within the width of the belt body 2. One of the rolled out portions, 3A, is generally straight in the width direction, while the other portion, 3B, is formed into a Y-shape opening outward in the width direction. The Y-shaped portions 3B are coupled with the belt body 2 in the longitudinal direction relative to the belt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic crawler,
It is used for traveling equipment such as agricultural vehicles, combines, and construction equipment.

[0002]

2. Description of the Related Art An elastic crawler, in which running lugs are integrally formed in a staggered arrangement on the right and left on a ground surface of a belt-shaped main body made of an elastic material such as rubber, has a configuration in which the running lugs are linear, and When it is stretched, the lug interval at the portion corresponding to the wheel passing surface is too wide, and the drop at the lug portion is large, which is a vibration source. In addition, since the lug contact pressure on the rolling wheel passage surface is higher than other parts, lug wear is severe.

For this reason, as shown in FIG. 7, a traveling lug B formed on the grounding surface of the belt-shaped main body A is formed in a substantially X-shape, and an elastic crawler formed on the crotch portion B1 at a portion corresponding to the rolling wheel passing surface. Is conventionally known (similar 2 of design registration 59208).
reference).

[0004]

The crawler of the prior art shown in FIG. 7 has usefulness in terms of vibration reduction and wear prevention since the crotch portions B1 are formed on both left and right sides of the running lug B. Although there is a very small gap between the crotch portions B1 between the adjacent lugs B, the soil and the like are easily clogged between them, and when this hardens, the function of the traveling lug substantially disappears, and the traveling performance such as a decrease in traction force is reduced. I will lose it. In view of the above, the present invention provides an elastic crawler in which a crotch portion is formed in a traveling lug to reduce vibration and prevent abrasion, etc., thereby ensuring soil removal properties and sufficiently expecting traveling performance. That is the purpose.

[0005]

SUMMARY OF THE INVENTION The present invention relates to an elastic crawler 1 in which a running lug 3 made of an elastic material such as rubber is integrally formed on a ground surface of a belt-shaped main body 2 made of an elastic material such as rubber. In order to achieve the above-mentioned purpose, the following technical measures are taken. That is, in the present invention, the running lug 3 extends from the center in the width direction of the band body 2 to the left and right within the width of the band body 2, and one of the extensions is a substantially straight extending portion 3A in the width direction. The other is formed in a crotch portion 3B having an outwardly expanding shape in the width direction, and the crotch portion 3B is connected by the band main body 2 in the band longitudinal direction (claim 1).

Further, in the elastic crawler 1 according to the first aspect, the running lugs 3 are characterized in that the crotch portions 3B are arranged in a zigzag pattern alternately on the left and right at intervals in the band longitudinal direction of the band main body 2. (Claim 2). Furthermore, in the elastic crawler 1 according to claim 1 or 2, the crotch portions 3B of the running lug 3 are arranged in a staggered left and right direction corresponding to the left and right wheel passing surfaces 5, and between the crotch portions 3B. Are characterized in that the discharging portions 6 are alternately arranged in a staggered manner on the left and right sides (claim 3).

Further, in the elastic crawler 1 according to any one of claims 1 to 3, the running lug 3 composed of the substantially linear extending portion 3A and the outwardly expanding crotch portion 3B has a trapezoidal cross section. The trapezoidal top is defined as a ground plane 3C, and the ground plane 3C is formed in a substantially Y shape or a substantially V shape (claim 4). Further, claims 1 to 4
In the elastic crawler 1 according to any one of the above, the traveling lug 3 composed of the substantially linear extending portion 3A and the outwardly expanding crotch portion 3B is formed so that the extending portion 3A is located at the center of the band body 2 in the width direction. And the crotch portion 3B is arranged on the left and right
A pair of left and right guide protrusions 4 for preventing derailing are protruding at a substantially central portion in the band width direction on the side opposite to the ground contact surface side of the band main body 2 so as to occupy a portion corresponding to. It is characterized by being formed (claim 5).

Further, in the elastic crawler 1 according to the first to fifth aspects, a tensile body is embedded in the band main body 2 in the band longitudinal direction, and the left and right projections 7A are spaced apart in the band longitudinal direction. The core bar 7 is embedded, a driving engagement window 8 is formed between the core bars 7, and the running lug 3 is substantially disposed in a projection area of the core bar 7. (Claim 6).

[0009]

The elastic crawler 1 according to the present invention is endlessly wound around a wheel body and circulates by friction transmission or pin transmission. Although the tractive force is generated by the running lug 3, the fall of the rolling wheel 9 and the like is eliminated at the portion corresponding to the wheel passing surface 5 because the crotch portion 3B is connected by the band main body 2 in the band longitudinal direction. The contact pressure is dispersed and wear is small. In addition, the crotch portion 3B has a staggered left and right arrangement,
Since the earth discharging portion 6 is provided between the crotch portions 3B, the clogging between the lugs is reduced, and the running performance is sufficiently ensured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1A and 1B showing the first embodiment, an elastic crawler 1 is provided on the grounding surface of a band-shaped main body 2 made of an elastic material such as rubber, synthetic rubber, plastic, or the like in a staggered right and left arrangement. A traveling lug 3 made of a material is integrally formed so as to protrude, and is wound endlessly around a wheel body 9 such as a driving drum, a driven drum, or a stepping wheel so as to circulate around.

A pair of left and right guide rails (guide projections) 4 for preventing wheel derailing are formed at substantially the center of the belt-shaped body 2 on the side opposite to the ground contact surface in the width direction of the belt. It is a ring passing surface 5. The running lug 3 extends from the center in the width direction of the band main body 2 to the left and right within the width of the band main body 2, and one of the extending portions 3A is substantially linear, and the other is a bifurcated band main body 2. The crotch portion 3B is formed in the crotch portion 3B connected in the belt longitudinal direction. I have. Here, by forming the extending portion 3A in a substantially linear shape, the space between the lugs 3 adjacent in the longitudinal direction is widened to reduce the clogging of soil or the like. FIG.
In (B), A is the maximum contact length of the lug 3, and B is the fall of the rolling wheel between the left and right lugs adjacent in the longitudinal direction. In the first embodiment, A> B is satisfied, and vibration is reduced. Is being planned.

The running lug 3 has a trapezoidal cross section, and the top of the trapezoid is a grounding surface 3C. The grounding surface 3C is tapered from one side to the other and widened.
By forming a notch concave portion 3D having a V-shape in plan view at a portion corresponding to the above, the crotch portion 3B is connected in the band longitudinal direction by the band main body 2, and the entire shape is substantially Y-shaped. is there. Here, it is conceivable not to form the cut concave portion 3D. However, in this case, not only the amount of rubber becomes large and the weight becomes excessive, but also the bending rigidity at the winding portion becomes excessive. A concave portion 3D is formed to secure flexibility at the winding portion as the crotch portion 3B, and the notch concave portion 3 is made lighter with weight reduction.
While the traction force can be generated also by the edge 3E and the upright surface of D, the crotch portion 3B is connected (connected) in the band longitudinal direction by the band main body 2, and the crotch portion 3B (substantially of the band main body 2) is formed. The fall of the wheels at the left and right wings is prevented.

FIGS. 2 and 3 show the second and third embodiments, respectively, which are common to the above-described first embodiment. In the second embodiment shown in FIG. In the third embodiment shown in FIG. 3, B is minus, that is, A on the left and right are overlapped with each other, which is advantageous in terms of vibration reduction. In the third embodiment, by forming the intermediate rib 3F on the crotch portion 3B, the crotch portion 3B can be formed as a three-forked portion. In the first to third embodiments described above, the substantially linear extending portion 3A is used.
The traveling lug 3 composed of the outer lugs 3B and
The width in the width direction of the band body 2 is the extension portion 3A and the crotch portion 3B.
Are approximately the same length (in the figure, the extended portion 3A is slightly longer than the crotch portion 3B), and the extended portion 3A is
The crotch portion 3B occupies a portion corresponding to the left and right wheel passing surfaces 5 and is alternately arranged in a staggered manner on the left and right sides. A pair of left and right guide projections 4 for preventing wheel decoupling are formed substantially at the center of the band width direction.

FIGS. 4 and 5 show the fourth and fifth embodiments, respectively. In each case, the running lug 3 is formed in a substantially V-shape in plan view, and the crotch portions 3B are arranged in a staggered right and left direction. FIG. 4 shows the discharge parts 6 arranged in a zigzag pattern on the left and right sides.
5 shows a narrow lag pitch, and FIG. 5 shows a wide lag pitch. In the elastic crawlers 1 of the first to fifth embodiments described above, the band longitudinal direction tensile members are embedded in the band main body 2, and substantially at the center in the band width direction of the band main body 2 and in the band longitudinal direction. Therefore, the driving window 8 is not formed between the adjacent running lugs 3.

FIGS. 6A and 6B show a first embodiment in which a metal core 7 having left and right protrusions 7A is embedded in an elastic crawler 1 having a running lug 3 at predetermined intervals in the longitudinal direction of the band. This is a sixth embodiment in which an engagement window 8 through which the nail of the drive sprocket is engaged and disengaged is formed between the gold members 7, and the traveling lug 3 is disposed substantially in the projection area of the core metal 7. In the sixth embodiment, the elastic crawler 1 is wound around a driving sprocket, a driven sprocket and the like in an endless manner. In the above-described first to sixth embodiments, a tensile body such as a cord can be embedded in the belt-shaped main body 2 in the longitudinal direction.

[0016]

As described in detail above, the elastic crawler of the present invention can prevent the occurrence of vibration, wear and the like caused by dropping of the wheel body,
Not only the traction is prevented by preventing soil clogging, but also the traction force is ensured by the slip prevention, and more effective traction performance can be secured by cooperation of the linear extending portion and the crotch portion, so that the traveling performance can be improved. Therefore, the present invention is very useful when used in an infinite traveling device such as a combine, an agricultural truck, and a construction machine.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, wherein (A) is an elevation view,
(B) is a bottom view of the main part.

FIG. 2 is a bottom view of a main part showing a second embodiment of the present invention.

FIG. 3 is a bottom view of a main part showing a third embodiment of the present invention.

FIG. 4 is a bottom view of a main part showing a fourth embodiment of the present invention.

FIG. 5 is a bottom view of a main part showing a fifth embodiment of the present invention.

6A and 6B show a sixth embodiment of the present invention, wherein FIG. 6A is a bottom view of a main part, and FIG. 6B is a sectional view.

FIG. 7 is a bottom view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic crawler 2 Band-shaped main body 3 Running lug 3B Crotch part 5 Wheel passage surface 6 Discharge part

Claims (6)

[Claims] An elastic crawler (1) in which a running lug (3) made of an elastic material such as rubber is integrally formed on a ground surface of a belt-shaped main body (2) made of an elastic material such as rubber, The running lug (3) extends from the center in the width direction of the band body (2) to the left and right within the width of the band body (2), and one of the extensions is a substantially linear extending portion (3A) in the width direction. And the other is formed in a crotch portion (3B) that is outwardly expanded in the width direction.
Is an elastic crawler characterized by being connected in the longitudinal direction of the band by a band body (2). 2. The running lug (3), wherein the crotch portions (3B) are arranged in a zigzag pattern alternately on the left and right at intervals in the band longitudinal direction of the band main body (2). An elastic crawler according to claim 1. 3. The crotch (3) of the running lug (3).
B) are alternately arranged in a zigzag pattern on the left and right sides corresponding to the left and right loop body passing surfaces (5), and the discharging portions (6) are alternately arranged in a zigzag manner between the crotch portions (3B). The elastic crawler according to claim 1 or 2, wherein: 4. A running lug (3) comprising a substantially linear extension (3A) and an outwardly expanding crotch (3B) has a trapezoidal cross section, and the top of the trapezoid has a ground contact surface. The elastic crawler according to any one of claims 1 to 3, wherein the ground contact surface (3C) is formed in a substantially Y shape or a substantially V shape. 5. A traveling lug (3) composed of a substantially linear extension (3A) and an outwardly expanding crotch (3B), wherein the extension (3A) has a belt body (2). The crotch portion (3B) is arranged so as to occupy the center portion in the width direction of the left and right wheels.
Are arranged in a zigzag pattern alternately on the left and right sides of the belt main body (2), and at the approximate center of the band width direction on the side opposite to the contact surface of the band main body (2), the left and right of the guide protrusions (4) for preventing derailing. The elastic crawler according to any one of claims 1 to 4, wherein the pair is formed with a ridge. 6. The elastic crawler (1) according to claim 1, wherein a tensile body is embedded in the belt main body (2) in the longitudinal direction of the belt and spaced apart in the longitudinal direction of the belt. A metal core (7) having left and right protrusions (7A) is embedded, a driving window (8) is formed between the metal cores (7), and the traveling lug (3) is substantially a metal core. An elastic crawler arranged in the projection area of (7).