JPH07117738A - Resilient crawler - Google Patents

Abstract

PURPOSE:To improve the traveling performance and avoid any furrow devastation due to a sweeping turn by situating the end of a lag in the side end of a crawler body, and installing a projection protruded outward from the crawler body at the more inner circumferential side from the crawler body than the midway in the height direction of the lag. CONSTITUTION:An end part in the crawler width direction of a lag 4 is situated at the side end of a crawler body 2 or in an inner part (a central side of the crawler body 2) otherwise, and it is formed into a shape being not jutting out of the side end of the crawler body 2 in design. A reinfroced projecting strip 19 in formed on an inner circumferential surface 6 of the crawler body 2, and corresponding to the lag 4, the outer end is more projected outward than the crawler body 2, forming a projection 5. In this constitution, an underside (surface at the outer circumferential side) 5A of this projection 5 is situated in the more upper side than a peripheral surface 3, and its rigidity is ensured by the reinforced projection strip 19. the underside 5A of the projection 5 is tilted the inner circumferential side toward the outside from the peripheral surface 3, while a top face is made to be flush with another top face of the reinforced projection strip 19.

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 in a tracked vehicle for construction, civil engineering, agriculture and the like.

[0002]

2. Description of the Related Art Generally, an elastic crawler has core bars embedded in a crawler main body made of an elastic material at equal intervals in the crawler circumferential direction (hereinafter abbreviated as a circumferential direction), and engaging members for engaging a drive sprocket between the core bars. A fitting hole is formed, and a pair of left and right (crawler width direction) protrusions are formed on each core metal so as to project to the inner peripheral side, and lugs are integrally formed on the outer peripheral surface at positions corresponding to each core metal.

For example, an elastic crawler used in a combine for super-wetland has an end portion of a lug protruding outward from a crawler body in order to increase a traction force in the wetland.
The traction force can be exerted even in the protruding portion (Japanese Utility Model Publication No. 60-7272, Japanese Patent Publication No. 58-5286).
No. 8).

[0004]

In the above-mentioned prior art, since the lug length is longer than the crawler body width, in soft ground, when slipping due to clogging makes it difficult to proceed and sinking is likely (at the time of stacking). When turning, the protruding part of the lug end bites into the side wall and can travel on a new road surface, improving the running performance, but the part protruding from the crawler body is grounded on the cultivator Therefore, there is a problem that the cultivator is damaged by the circulation.

According to the present invention, the end portion of the lug is located within the side edge of the crawler body, and the protrusion protruding outward from the crawler body is provided on the inner peripheral side from the crawler body side rather than the middle in the height direction of the lug. Accordingly, it is an object of the present invention to provide an elastic crawler capable of improving traveling performance and avoiding cultivator roughening due to traveling.

[0006]

A first specific means for solving the problems in the present invention is to provide crawler width direction ends of lugs 4 formed on an outer peripheral surface 3 of an elastic material crawler body 2 at equal intervals in the circumferential direction. The protrusions 5 are located within the side edges of the crawler body 2 and are provided on the side edges of the crawler body 2 at circumferential intervals so that the protrusions 5 project outwardly from the crawler body 2 in the height direction of the lug 4. It is provided from the side to the inner peripheral side.

A second specific means for solving the problems in the present invention is, in addition to the first specific means, a position in which the projection 5 corresponds to the lug 4 corresponding position or the lug 4 in the circumferential direction of the crawler body 2.
That is, they are placed in the middle position. The third concrete means for solving the problem in the present invention is that the projection 5 is formed continuously with the lug 4 in addition to the first concrete means.

[0008]

When the elastic crawler goes straight, even in an ultra-wet field, the lugs 4 that are in contact with the cultivator only provide sufficient traction to run, but if the lugs 4 become clogged, they will slip and will not move, and will sink. Is likely to cause. In that case, when it goes around, the protrusion 5 protruding outward of the crawler body 2 bites into the side wall (the soil in the field on the side thereof), and the protrusion 5
Generates traction.

In this case, since the protrusion 5 is provided on the inner peripheral side from the crawler body 2 side rather than the middle of the lug 4 in the height direction,
Since it is not grounded on the cultivator, it does not damage the cultivator etc. due to circulation.

[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, 1 is an elastic crawler, which is wound around wheels such as a sprocket drive wheel, a driving wheel, and a plurality of rolling wheels 11. In this elastic crawler 1, a cored bar 12 made of metal or synthetic resin is embedded in a crawler body 2 made of an elastic material such as rubber or synthetic resin at equal intervals in the crawler circumferential direction A.
A pair of left and right circumferential tension members 13 made of steel or the like are embedded on the outer circumference (grounding surface) side of the cored bar 12, and the crawler main body 2 is located at or near the center in the horizontal direction and the cored bar 1
An engaging hole 14 is formed between the two for engaging the drive wheel, and a lug 4 is integrally formed on the outer peripheral surface 3 of the crawler body 2 in correspondence with the core metal 12.

A pair of left and right protrusions 15 is provided on each core bar 12.
Are formed integrally with each other, and are formed so as to project toward the inner peripheral surface 6 side of the crawler body 2, and the rolling wheels 11 are provided outside the left and right protrusions 15.
Is formed with a flat wheel passage surface 16 on which the wheels roll. The lug 4 is a linear member located between the engaging holes 14, and its length is the same as the width of the crawler body 2 at the base portion, and is shorter than the width of the crawler body 2 at the ground contact surface 17 at its tip. . That is, the end portion of the lug 4 in the crawler width direction is located at the side end of the crawler body 2 or inside (the center side of the crawler body 2) and does not project from the side end of the crawler body 2.

Reinforcing ridges 19 are formed on the inner peripheral surface 6 of the crawler body 2 outside the wheel passage surface 16. The reinforcing ridges 19 correspond to the lugs 4, and the wing portions of the crawler body 2 Not only is it reinforced, but it also prevents the rolling wheels 11 and other wheels from slipping off. An outer end of the reinforcing ridge 19 projects outward from the crawler body 2 to form a protrusion 5. The lower surface (outer peripheral surface) 5A of the protrusion 5 is located above the outer peripheral surface 3, and the rigidity thereof is ensured by the reinforcing ridges 19.
The lower surface 5A of the protrusion 5 is inclined outward from the outer peripheral surface 3 toward the inner peripheral side, and the upper surface thereof is flush with the upper surface of the reinforcing ridge 19.

In the second embodiment shown in FIGS. 4 and 5, the inner peripheral surface 6 of the crawler body 2 is not provided with a reinforcing ridge, and the projection 5 is projected outward from the outer end of the crawler body 2. The lower surface 5A of the protrusion 5 is located on the outer peripheral side of the outer peripheral surface 3 and is continuous with the lug 4 from the base of the lug 4 to the middle portion in the lug height direction. The rigidity of the protrusion 5 is secured by the lug 4.

In the first and second embodiments, since the projection 5 is projected outward from the crawler body 2, it can bite into the wall on the lateral side of the crawler to generate a traction force when the vehicle travels. In order to prevent the contact surface 17 of the lug 4 from contacting the cultivator that contacts the ground, the contact surface 17 may be located on the inner peripheral side from the crawler body 2 side rather than the middle of the lug 4 in the height direction. In the third embodiment shown in FIGS. 6 to 8, the protrusion 5 is arranged at a position between the lugs 4 in the circumferential direction of the crawler body 2, is projected from the outer side portion of the crawler body 2 to the outer side, and the crawler body 2 is also formed. The protrusions are further formed on the outer peripheral side and the inner peripheral side, thereby increasing the traction force during traveling and ensuring the connection strength to the crawler body 2 even if the protrusion 5 is located between the lugs 4. There is.

Further, in the third embodiment, the lug 4 having the same width as the crawler body 2, the short one not reaching the outer end of the crawler body 2, and the long and short two types are alternately arranged. There is. The lower surface 5A of the protrusion 5 is formed substantially parallel to the ground surface 17. In the fourth embodiment shown in FIGS. 9 and 10, the protrusion 5 has the same shape as that of the third embodiment and is arranged at the position corresponding to the lug 4, but is not continuous with the lug 4.
The lugs 4 are shorter than the width of the crawler body 2, and those that do not reach the right outer end from the left outer end and those that do not reach the left outer end from the right outer end are alternately arranged in the circumferential direction A. The protrusion 5 is arranged on the extension of the side that does not reach the outer end.

In the fifth embodiment shown in FIG. 11, the protrusion 5
The upper and lower surfaces are substantially flush with the outer peripheral surface 3 and the inner peripheral surface 6 of the crawler body 2. In this case, in order to secure the connection strength of the protrusion 5 to the crawler main body 2, it is preferable to increase the length of the protrusion 5 in the circumferential direction A. 6th shown in FIG.
In the embodiment, the lugs 4 are arranged in a staggered manner as in the fourth embodiment, and the protrusions 5 are provided corresponding to the lugs 4 only on the side where the outer end of the lug 4 reaches the outer end of the crawler body 2.
Moreover, the protrusion 5 is formed continuously or separately from the lug 4 on only one side of the crawler body 2.

In the seventh embodiment shown in FIG. 13, the lug 4
Are arranged in a staggered manner as in the sixth embodiment, and the protrusions 5 are provided on only one side of the crawler body 2 but corresponding to all the lugs 4. In the seventh embodiment, the engagement hole 14 is formed so as to be displaced from the center of the crawler body 2 in the width direction to the side where the protrusion 5 is not provided. In the eighth embodiment shown in FIG. 14, two types of lugs 4, which are shorter and shorter than the width of the crawler body 2, are alternately arranged, but all the lugs 4 are extended to one outer end of the crawler body 2. In addition, the side reaching the outer end of the crawler body 2 is slightly inclined in the circumferential direction A, and the protrusion 5 is arranged corresponding to all the lugs 4 on the side where the lug 4 reaches the outer end of the crawler body 2. There is.

The present invention is not limited to the above-mentioned embodiments, but can be variously modified. For example, the projection 5 may have a trapezoidal shape, a square shape, or a rounded shape as the front shape and the planar shape, and the lug 4 may have various known patterns. It may be at a position corresponding to the lug 4 or at a position between the lugs 4 and may or may not be continuous.
The number may be larger or smaller than the number, and may be on one side or both sides of the crawler body 2, and these conditions may be appropriately combined.

[0019]

According to the present invention described in detail above, the end portion of the lug 4 in the crawler width direction is positioned within the side end of the crawler body 2, and the protrusion 5 protruding outward from the crawler body 2 is raised. Since it is provided from the crawler main body 2 side to the inner peripheral side rather than in the middle in the vertical direction, it is possible to prevent the cultivator from being damaged while securing the generation of traction force during traveling.

[Brief description of drawings]

FIG. 1 is a sectional front view showing a first embodiment of the present invention.

FIG. 2 is an inner peripheral view of the same.

FIG. 3 is an outer peripheral view of the same.

FIG. 4 is a sectional front view showing a second embodiment.

FIG. 5 is an outer peripheral view of the same.

FIG. 6 is a sectional front view showing a third embodiment.

FIG. 7 is an inner peripheral view of the same.

FIG. 8 is an outer peripheral view of the same.

FIG. 9 is a sectional front view showing a fourth embodiment.

FIG. 10 is an outer peripheral view of the same.

FIG. 11 is a sectional front view showing a fifth embodiment.

FIG. 12 is an outer peripheral view showing a sixth embodiment.

FIG. 13 is an outer peripheral view showing a seventh embodiment.

FIG. 14 is an outer peripheral view showing an eighth embodiment.

[Explanation of symbols]

 1 elastic crawler 2 crawler main body 3 outer peripheral surface 4 lug 5 protrusion 6 inner peripheral surface 11 core metal 14 engagement hole

Claims (3)

[Claims] 1. The crawler width direction ends of lugs (4) formed on the outer peripheral surface (3) of the elastic material crawler body (2) at equal intervals in the circumferential direction are located within the side ends of the crawler body (2). Then, the protrusions (5) protruding outward are provided at the side ends of the crawler body (2) at circumferential intervals from the crawler body (2) side rather than the middle of the lug (4) in the height direction. An elastic crawler that is provided on the side. 2. The elastic crawler according to claim 1, wherein the projections (5) are arranged at positions corresponding to the lugs (4) or positions between the lugs (4) in the circumferential direction of the crawler body (2). . 3. Elastic crawler according to claim 1, characterized in that the projections (5) are formed continuously with the lugs (4).