JPH07315265A - Elastic crawler - Google Patents

Abstract

PURPOSE:To set the length of an engaging hole approximately equal to that of an engaging part so as to reduce the number of projection parts by arranging a single engaging projection part and a pair of regulating projection parts putting the engaging projection part between them in an approximately central part of the engaging hole and arranging them on the installing face side beyond an engaging position for a claw of a driving wheel. CONSTITUTION:Inside an endless belt crawler main body 2 made of elastic material, mandrels 3 are arranged at some intervals in the circumferential direction, and an engaging hole 5 to which a claw 4 of a driving wheel is engaged is formed between engaging parts 8 in the middle of the width direction of the mandrels 3. In the elastic crawler, in which a pair of regulating projection parts 6 facing the engaging hole 5 are arranged in the width direction on one side of the mandrels 3 positioned in the front and the rear in the circumferential direction of each engaging hole 5, and on the other side of the mandrels 3, an engaging projection part 7 positioned between the pair of regulating projection parts 6 is arranged, the engaging projection part 7 is arranged in the approximately central part of the engaging hole 5, while the pair of regulating projection parts 6 are arranged in the vicinity of the engaging projection part, 7 while putting it between them, and these are arranged on a ground face side beyond an engaging position for the claw 4 of the driving wheel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic crawler used for a traveling device such as a truck, an agricultural machine, a construction / civil engineering machine, and a snowplow.

[0002]

2. Description of the Related Art As a conventional elastic crawler, Japanese Patent Laid-Open No.
There is one disclosed in Japanese Patent Publication No. 243673. In this elastic crawler, cored bars are embedded in an endless belt-shaped crawler body made of an elastic material at equal intervals in the circumferential direction, and engagement holes for engaging the claws of a drive wheel between engaging parts in the widthwise middle of the cored bar. A pair of restricting protrusions facing the engaging hole in the width direction is provided on one of the cores located in the circumferential direction of each engaging hole, and a pair of engaging members located between the pair of restricting protrusions on the other side. Protrusions are provided, and circumferential tension members are arranged outside the pair of restriction protrusions in the width direction.
The widthwise relative movement of the cored bar is prevented by the engagement of the restricting protrusion and the engaging protrusion so that the crawler can be prevented from side slipping, twisting, reverse bending, and the like.

[0003]

In the above-mentioned prior art, since the restricting protrusion and the engaging protrusion are vertically overlapped with the claws of the drive wheel, the engaging hole is formed in the width direction from the engaging portion. It must be wide and the claws of the drive wheel must fit between the pair of engaging projections, so that each is formed in two pieces, which requires a large number of projections. Since the contact hole is large, the ground contact pressure of the crawler body is high, and the circumferential tensionable member disposition range on the outer side in the width direction of the restriction protrusion is narrowed.

By the way, the above-mentioned prior art also discloses a structure in which the restricting protrusion and the engaging protrusion are formed on the wing portion of the core metal. In this case, it is not necessary to form the engaging hole large, Since the mandrel tilts, the tips of the restricting protrusion and the engaging protrusion may largely swing, which may damage the crawler body. An object of the present invention is to dispose one engagement protrusion and a pair of restriction protrusions sandwiching the engagement protrusion substantially at the center of the engagement hole, and dispose these on the ground plane side from the engagement position of the pawl of the drive wheel. Thus, the engaging hole can be made substantially the same width as the engaging portion and the number of protrusions can be reduced.

[0005]

A first concrete means for solving the problems in the present invention is to embed cored bars 3 in an endless belt-shaped crawler main body 2 made of an elastic material at circumferential intervals. Engagement holes 5 with which the claws 4 of the drive wheels are engaged are formed between the engaging portions 8 in the middle of the core metal 3 in the width direction, and one of the core metals 3 located in the circumferential direction front and rear of each engagement hole 5 is formed. An elastic crawler provided with a pair of restricting protrusions 6 facing the engaging holes 5 in the width direction and an engaging protrusion 7 located between the pair of restricting protrusions 6 on the other side, engages with the engaging protrusions 7. By arranging the pair of restricting projections 6 in the vicinity of the hole 5 so as to sandwich the hole 5, and by arranging the restricting projections 6 closer to the ground surface than the engaging position of the claw 4 of the drive wheel. is there.

The second specific means for solving the problems in the present invention is, in addition to the first specific means, a pair of restricting projections 6 from the engaging portion 8 of the core metal 3 to the engaging hole 5. That is, the tip of the projection 9 that is inclined toward the side and the ground contact surface side is formed in a bifurcated shape. The third concrete means for solving the problems in the present invention is, in addition to the first concrete means, a pair of restricting protrusions 6 which are capable of abutting against the grounding surface side of the engaging protrusions 7. That is, the portion 11 is integrally provided.

A fourth specific means for solving the problems in the present invention is, in addition to the first specific means, an engaging projection 7
That is, the tip end of the protrusion 10 that is inclinedly projected from the engaging portion 8 of the core metal 3 toward the engaging hole 5 side and toward the ground contact surface side is formed to be narrow.

[0008]

In the elastic crawler 1, the core metal 3 is provided with the restricting protrusion 6 and the engaging protrusion 7 which face the engaging hole 5, and the engaging protrusion 7 is arranged substantially at the center of the engaging hole 5. A pair of regulating protrusions 6 are arranged close to each other so as to sandwich the regulating protrusions 6
By abutting the engaging projection 7 with each other, the widthwise displacement of the cored bars 3 is restricted.

The restriction projection 6 and the engagement projection 7 are arranged closer to the ground surface than the engagement position of the claw 4 of the drive wheel, so that interference with the claw 4 of the drive wheel is avoided and the restriction projection The vibration damping portion 11 provided integrally with 6 abuts on the ground surface side of the engaging projection portion 7 to limit the vertical displacement of the cored bars 3.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment shown in FIGS. 1 to 3, reference numeral 1 denotes an elastic crawler which is wound around wheels such as a drive wheel, a driving wheel and a rolling wheel of a crawler traveling device.
Is an endless strip-shaped crawler body 2 made of an elastic material such as rubber or synthetic resin, and the lug 13 for generating traction is formed on the ground surface (outer peripheral surface) of the crawler body 2.
At a predetermined interval in the circumferential direction (front-back direction) of the crawler body 2 and in a zigzag manner in the width direction (left-right direction).

Inside the crawler body 2, a large number of cored bars 3 are embedded as circumferential width reinforcing members made of metal or reinforced synthetic resin at equal intervals or at required intervals in the circumferential direction. A tensile body 14 such as a steel cord is embedded on the outer peripheral side of the core metal 3 along the circumferential direction. The core metal 3 includes an engaging portion 8 located at or near the center of the crawler body 2 in the width direction, wing portions 15 projecting from both sides of the engaging portion 8, and the engaging portions 8. It has a pair of width direction wheel support portions 16 projecting toward the inner peripheral side of the crawler body 2 at the boundary with both blade portions 15. The wheel support portion 16 is
The tip of the crawler main body 2 that protrudes toward the inner peripheral side serves as a wheel traveling surface or functions as a wheel removal preventing protrusion that prevents the wheel from moving in the relative width direction.

At or near the center of the crawler body 2 in the width direction, there are formed engagement holes 5 penetrating inward and outward (up and down) between the circumferential arrangements of the engaging portions 8. The claw 4 of the drive wheel can be inserted, and the claw 4 of the drive wheel enters the engaging hole 5 and meshes with the engaging portion 8 to transmit power. The core metal 3 is provided with an engaging hole 5 from the substantially center of the engaging portion 8 on one of the front and rear in the circumferential direction.
The projection 9 is projected so as to face the
From the ground surface side to the engagement hole 5 side and to the ground surface side in an inclined shape, and on the other side, from the substantially center of the engagement portion 8 to the engagement hole 5 side.
The protrusion 10 is protruded so as to face the contact surface, and the protrusion 10 is formed to be inclined from the ground surface side of the engaging portion 8 toward the engaging hole 5 side and toward the ground surface side.

The tip of the protrusion 9 has a bifurcated shape,
A pair of regulating protrusions 6 in the width direction is formed, and the tip of the protrusion 10 is narrowed, and the pair of regulating protrusions 6 of the protrusion 9 is formed.
The regulating projections 6 of the protrusions 9 of the one cored bar 3 that are formed in a shape that can be inserted into the inside and are positioned in the circumferential direction of the one engagement hole 5 are engaged with the protrusions 10 of the other cored bar 3. The engaging projection 7 is engaged.

The engaging protrusion 7 and the pair of restricting protrusions 6 that are close to each other so as to sandwich the engaging protrusion 7 are arranged closer to the ground surface than the engagement position of the claw 4 of the drive wheel, that is, the ground surface of the engagement portion 8. When the claws 4 of the drive wheels mesh with the engaging portions 8, they are positioned so as not to interfere with each other. The regulation protrusion 6
Has a bifurcated shape, a damping portion 11 is integrally formed on the ground contact surface side, and the cross-sectional shape of this portion is U-shaped as shown in FIG. Reference numeral 11 is capable of abutting on the ground surface side of the engaging projection 7, and by making contact, the upward movement of the restricting projection 6 and the downward movement of the engaging projection 7 are restricted, and one core metal 3 is attached. Vertical vibration can be suppressed by the two core bars 3 adjacent to it.

In the second embodiment shown in FIGS. 4 and 5, the restricting protrusion 6 is two plate-like protrusions protruding from the core metal 3,
The vibration-damping portion 11 is not formed, the engaging protrusion 7 is a single plate-like protrusion, and the engaging protrusion 7 is inserted into the double-plate regulating protrusion 6 and the width of the core metal 3 is different from that of the core metal 3. Only directional movement is restricted. In the second embodiment, the regulation projection 6 and the engagement projection 7 are easier to form than the first embodiment.

The present invention is not limited to the above embodiment, but can be variously modified. For example, by interposing an elastic material between the restricting protrusion 6 and the engaging protrusion 7,
One of the protrusion 9 and the protrusion 10 may be largely protruded and the other may be slightly protruded so that noise is not generated even when they abut. In addition, among the large number of cored bars 3 in one elastic crawler 1, the restriction protrusions 6 are formed before and after every other metal 3 and the engagement protrusions 7 are formed before and after the other every other cored bar 3. May be formed.

[0017]

According to the present invention described in detail above, the engaging protrusion 7 is disposed substantially at the center of the engaging hole 5, and the pair of restricting protrusions 6 are disposed in close proximity so as to sandwich it. Moreover, since these are arranged on the ground contact surface side from the engagement position of the claw 4 of the drive wheel, the relative movement of the core metal 3 in the width direction is prevented by the engagement of the restriction projection 6 and the engagement projection 7. Even if the crawler is configured to prevent side slippage, twisting, reverse bending, etc., the engagement hole 5 can be formed into a small shape having substantially the same width as the engagement portion 8 and the number of the engagement protrusions 7 is reduced to one. be able to.

The pair of restricting protrusions 6 are formed by forming a forked tip of a protrusion 9 projecting obliquely from the engaging portion 8 of the core metal 3 toward the engaging hole 5 side and toward the grounding surface side. Therefore, the strength of the restriction protrusion 6 can be increased. Since the pair of restricting protrusions 6 integrally has a vibration damping portion 11 that can come into contact with the ground contact surface side of the engaging protrusion 7, the upper and lower relative movements of the cored bars 3 are restricted, Vertical vibration of the elastic crawler 1 can be suppressed.

The engaging projection 7 is a projection 1 projecting obliquely from the engaging portion 8 of the core metal 3 toward the engaging hole 5 side and toward the ground contact surface side.
Since the tip of 0 is formed with a narrow width, the engaging protrusion 7
Even if only one is used, the strength can be increased.

[Brief description of drawings]

FIG. 1 is a plan view of an elastic crawler according to a first exemplary embodiment of the present invention viewed from a ground contact surface side.

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

3 is a cross-sectional view taken along line YY of FIG.

FIG. 4 is a plan view of the elastic crawler of the second embodiment as seen from the ground contact surface side.

5 is a sectional view taken along line ZZ of FIG.

[Explanation of symbols]

 1 Elastic Crawler 2 Crawler Main Body 3 Core Bar 4 Drive Wheel Claw 5 Engagement Hole 6 Restriction Protrusion 7 Engagement Protrusion 8 Engagement 9 Protrusion 10 Protrusion 11 Damping Part

Claims (4)

[Claims] 1. A cored bar (3) is embedded in an endless belt-shaped crawler body (2) made of an elastic material at circumferential intervals,
Engagement holes (5) with which the claws (4) of the drive wheels engage are formed between the engaging portions (8) in the width direction of the core metal (3), and the engagement holes (5) are circumferentially arranged. A pair of regulating protrusions (6) facing the engaging hole (5) is provided in one of the front and rear cores (3) in the width direction, and the other is an engaging protrusion located between the pair of regulating protrusions (6). In an elastic crawler provided with a portion (7), the engaging protrusion (7) is arranged substantially at the center of the engaging hole (5), and a pair of restricting protrusions (6) are closely arranged so as to sandwich the engaging protrusion (7). An elastic crawler, which is arranged on the ground contact surface side with respect to the engagement position of the claws (4) of the drive wheels. 2. The pair of restriction protrusions (6) are protrusions (9) that are inclined from the engagement portion (8) of the core metal (3) toward the engagement hole (5) side and toward the ground contact surface side. 2. The elastic crawler according to claim 1, wherein the tip of (1) is formed in a bifurcated shape. 3. The pair of restricting protrusions (6) integrally has a damping portion (11) capable of contacting with the ground contact surface side of the engaging protrusion (7). The elastic crawler according to claim 1. 4. The projection (10), wherein the engagement projection (7) is inclined from the engagement portion (8) of the core metal (3) toward the engagement hole (5) and toward the ground contact surface. The elastic crawler according to claim 1, wherein the tip of the elastic crawler is formed to be narrow.