JP3349101B2 - Elastic crawler core and elastic crawler - Google Patents

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 agricultural machines, construction machines and the like, and a core for an elastic crawler embedded in the elastic crawler.

[0002]

2. Description of the Related Art A conventional elastic crawler is disclosed in
Japanese Unexamined Patent Publication No. 119286/1992. This elastic crawler has a core metal (core body) embedded in a crawler body made of an elastic material at intervals in a circumferential direction, and the core metal is engaged with a driving sprocket for feeding the crawler body. An engaging portion is formed at the center in the left and right direction, and two first guide projections are formed on one of the left and right sides of the engaging portion so as to protrude toward the inner peripheral side of the crawler body and are arranged at intervals in the circumferential direction. In addition, one second guide projection is formed on the left and right other sides of the engaging portion and protrudes toward the inner peripheral side of the crawler body and is disposed at a position corresponding to the space between the first guide projections. In addition, the first and second guide protrusions serve as left and right guides for the drive sprocket, and the top surfaces thereof form the running surfaces of rolling wheels that roll on the inner periphery of the crawler body.

[0003]

When the core is embedded in the crawler body, the first and second guide protrusions of the core adjacent to each other in the circumferential direction are arranged to be left and right reversed. The guide projections are arranged in a zigzag pattern over the entire circumference of the crawler, thereby forming a running surface for the continuous rolling wheels, preventing the rolling wheels from falling between the guide projections, and suppressing vibration and noise. And had

However, in each cored bar, mud tends to enter between the first guide projections in the circumferential direction, and when the mud accumulates along with the traveling of the elastic crawler, irregularities are formed on the running surface of the rolling wheel. On the contrary, there is a possibility that the guide function of the drive sprocket may be impaired due to the generation of vibration or the accumulation of muddy soil protruding toward the engaging portion. Therefore, the present invention provides an elastic crawler core and an elastic crawler that are capable of appropriately discharging mud and the like that have entered between the first guide protrusions of the core so as to perform appropriate running of rolling wheels and guiding of driving wheels. provide.

[0005]

The present invention employs the following technical means to achieve the above object. That is, the elastic crawler core according to the present invention is embedded in the endless belt-shaped crawler body made of an elastic material at intervals in the circumferential direction, and a driving wheel for driving the crawler body to rotate is engaged. An engaging portion, a plurality of guide protrusions projecting from the left and right side portions of the engaging portion to the inner peripheral side of the crawler body and provided at intervals in the circumferential direction, and In the core for an elastic crawler having a wing portion extending in the direction, a bottom surface formed by a left-right inclined surface capable of discharging mud and the like invaded between the guide protrusions is formed at the groove bottom between the guide protrusions. It is characterized by the following.

[0006] According to this, even if mud enters in the circumferential direction of the guide projection, it can be discharged through the discharging surface, and the accumulation of mud is prevented, and the mud is rolled on the guide projection. Appropriate traveling of the rolling wheels and guidance of the driving wheels can be performed without forming irregularities on the running surface of the moving rolling wheels or impairing the guide function of the driving wheels. Preferably, the earth discharging surface is formed on an inclined surface such that the inner side in the left-right direction is higher and the outer side is lower, and the engaging portion is formed so as to protrude more toward the inner peripheral side of the crawler body than the wing portion. Preferably, the earth discharging surface is formed as an inclined surface extending from a top surface of the engaging portion to an inner peripheral side surface of the wing portion.

[0007] By doing so, it becomes possible to discharge the mud or the like that has entered between the guide projections to the left and right outer sides opposite to the engaging portion, and to prevent the mud from covering the engaging portion. Is prevented, and engagement with the drive wheels is also suitably performed. Further, by forming the earth discharging surface as a concave arc surface, a portion of the earth discharging surface near the engaging portion is steeply inclined, and the earth discharging to the engaging portion side is reliably prevented. Become.

Also, as a core, two guide projections are provided circumferentially on one left and right side of the engagement portion, and one guide projection is provided on the other side on the left and right sides of the engagement portion and at a position corresponding to between the guide projections. It is preferable to provide a second guide projection, and by continuously arranging a large number of this core body in the crawler body such that the left and right positions of the guide projection and the second guide projection are alternately arranged in the circumferential direction, continuous rotation is achieved. The running surface of the driving wheel is obtained, and the smooth running of the rolling wheel becomes possible together with the removal of the mud by the discharging surface.

An elastic crawler according to the present invention comprises a crawler body formed in an endless band shape from an elastic material, and a core body embedded in the crawler body at a circumferential interval.
The core body has an engaging portion with which a driving wheel for driving the crawler body to rotate and engages, and a protruding inner circumferential side from the inner circumferential surface of the crawler body from a lateral side portion of the engaging portion. An elastic crawler having a plurality of guide projections provided at intervals in the direction, wherein the engaging portion is formed so as to protrude inward from the inner peripheral surface of the crawler body, and a groove between the guide projections An inclined surface extending from a top surface of the engaging portion to an inner peripheral surface of the crawler body is formed on the bottom.

[0010] Thereby, the mud that has invaded between the guide projections can be discharged to the left and right outside through the inclined surface, and the accumulation of the mud between the guide projections can be prevented to form irregularities on the running surface of the rolling wheel. It is possible to suppress vibration etc. without any trouble, and because the soil is discharged to the left and right outside on the opposite side to the engagement part side, the engagement with the drive wheel does not cover the engagement part with muddy soil It will be done properly.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a first embodiment of the present invention. In FIG. 4, the elastic crawler 1 is
The crawler main body 2 is formed in an endless belt shape from an elastic material such as rubber, and the crawler main body 2 has a lug 3 protruding from an outer peripheral surface thereof at intervals in a circumferential direction.

A large number of cores 4 according to the present invention are embedded in the crawler body 2 at intervals in the circumferential direction. As shown in FIGS. Or hard resin, and the crawler body 2
Is formed with an engagement portion 5 with which a sprocket-shaped drive wheel S for driving the crawler is engaged. On both outer sides in the left-right direction of the engagement portion 5, the inner peripheral side of the inner peripheral surface 2 a of the crawler body 2. And a top surface 6A, 7A of which forms a running surface of the rolling wheel T, and which guides the driving wheel S in the left-right direction.
The second guide projections 6 and 7 are formed, and the guide projections 6 and 7 are formed.
A pair of left and right wing portions 8 extending outward toward the left and right sides of the crawler body 2 are formed on both outer sides in the left-right direction.

Further, the engaging portion 5 of the core body 4 which is adjacent in the circumferential direction.
An engagement hole 10 is formed between the crawler body 2 in the inward and outward directions to insert the teeth of the driving wheel S, and a tensile body 11 is arranged on the outer peripheral side of the wing portion 8 in a left-right distribution manner. It is buried. The guide projections 6, 7 are provided on one side of the left and right sides of the engagement portion 5, and two first guide projections 6, 6 arranged at intervals in the circumferential direction. As shown in FIG. 4, adjacent cores 4 in the crawler main body 2 are formed of one second guide projection 7 provided on the other side. The left and right positions are reversed.

In each of the cores 4, the first and second guide projections 6, 6, 7 are formed to have substantially the same height, front, rear, left and right widths, respectively. 4 is provided so as to protrude forward and backward from the wing portion 8 in a state of being distributed back and forth with respect to the center in the front-rear direction. Further, the second guide projection 7 is disposed at the center of the core body 4 in the front-rear direction. Therefore, the second guide projection 7 is disposed between the first guide projections 6 and 6. ing.

The front and rear end portions of the second guide projection 7 and the front and rear end portions of the first guide projections 6 and 6 slightly overlap each other by an overlap amount α. In FIG. 4, the first guide protrusions 6 and the second guide protrusions 7 of the core body 4 that are adjacent in the circumferential direction are arranged at substantially the same interval as the circumferential distance between the first guide projections 6 and 6 of one core body 4. And thus the circumferentially adjacent core 4
Are arranged such that the first guide projections 6, 6 which are closest to each other overlap each other by the overlap amount α.

From the above, the running surface of the rolling wheel T which is continuous in the circumferential direction is formed by the first and second guide protrusions 6, 6, and 7, and the running surface between the guide protrusions 6, 6, and 7 in the circumferential direction is formed. Vibration and noise are suppressed by preventing a fall. Also, as shown in FIG. 3, the top surfaces 6A, 6A of the first guide projections 6, 6 in one core body 4 are slightly inclined so that the opposing sides thereof are lower. The smooth transition of the rolling wheel T with respect to the vibration can be prevented.

Further, since the number of the second guide projections 7 is one, the weight of the core body 4 can be reduced.
As shown in FIG. 1, the engaging portion 5 is formed to be thicker than the wing portion 8 and has a shape protruding from the wing portion 8 to the inner peripheral side of the crawler body 2. 2, it protrudes inward from the inner peripheral surface 2 a of the crawler body 2. Further, the engaging portion 5 is formed to have a smaller front-rear width than the wing portion 8, is disposed at the front-rear center of the core body 4, and is positioned between the first front-rear guide protrusions 6.

As shown in FIG. 2, the bottom of the groove between the first guide projections 6 and 6 extends from the left and right ends of the top surface of the engaging portion 5 to the surface of the wing portion 8 (the inner circumferential surface). Are formed on the inclined surface 9, and the inclined surface 9 is formed by the first guide protrusions 6.
The soil discharge surface allows the mud and the like that have entered between the six to be discharged therefrom. Note that the rubber portion of the crawler body 2 is coated on the discharging surface 9 in a thin film shape, and when the core body 4 is actually embedded in the crawler body 2, the thin film portion 2b is discharged. The earth surface 9 is formed, and the earth discharging surface 9 is formed as an inclined surface extending from the top surface of the engaging portion 5 to the inner peripheral surface 2b of the crawler body 2.

According to the above, even if mud enters between the first guide projections 6 and 6 as the elastic crawler 1 travels, the mud discharging surface 9 urges the discharge of the mud to the left and right sides,
The accumulation of mud in the space between the protrusions 6 and 6 is prevented, and the rolling wheel T
Of the driving surface of the driving wheel S
To prevent the guide from being disturbed. Further, since the earth discharging surface 9 is an inclined surface in which the inside in the left-right direction is high and the outside is low, the muddy soil that has invaded the engaging portion 5 is preferably directed to the left and right outside via the first guide projections 6 and 6. From the first guide projections 6
The mud is difficult to be discharged to the side, the mud is prevented from accumulating on the engaging portion 5, and the engagement with the driving wheel S can be properly performed.

Further, the earth discharging surface 9 is formed as a concave circular arc surface, so that the inclination angle near the engaging portion 5 becomes steep, so that the mud is discharged to the engaging portion 5 side reliably. In addition to this, the change in cross section becomes smooth on the base end (left and right inner end) side of the wing 8, so that it is possible to suppress the occurrence of stress concentration in the wing 8 which is thin and has low rigidity. I have.

FIGS. 7 and 8 show another embodiment relating to the earth discharging surface 9. FIG. 7A shows an example in which the earth discharging surface 9 is formed as a convex arc surface. In this case, the cross section of the right and left ends of the engaging portion 5 changes smoothly. It is possible to prevent the occurrence of stress concentration at the part,
Although the slope is closer to the steep side, the soil is more likely to be discharged to the left and right sides. However, since the slope closer to the engagement portion 5 is smooth, the slope is closer to the engagement portion 5 than the above. The possibility of discharging the mud becomes slightly higher, and in this regard, it is more advantageous to form a concave arc surface.

FIG. 7B shows an engagement portion 5.
It is formed on a substantially wave-shaped inclined surface combining concave and convex arc surfaces so that the inclination toward the wing portion and the inclination toward the wing portion 8 are steep. In this case, the left and right end sides of the engaging portion 5 and the wing are formed. Part 8
Although the change in the cross section on the base end side becomes abrupt, it is possible to promote the discharge to the wing portion 8 side while preventing the discharge of the mud to the engagement portion 5 side.

Although not shown, the earth discharging surface 9 may be formed as a flat inclined surface. 8A, the engaging portion 5 is formed so as to be substantially at the same level as the inner peripheral surface 2b of the crawler main body 2, and the earth discharging surface 9 is formed as a mountain-shaped inclined surface. In this case, the mud that has entered between the first guide protrusions is discharged to the right and left, but may be disturbed in engagement with the driving wheel S due to the discharge to the engaging portion 5 side. Therefore, each of the above embodiments is more preferable.

FIG. 8 (b) shows the discharge surface 9
Is formed on an inclined surface such that the left and right inner sides are lower and the outer side is higher, so that the soil can be discharged between the first guide projections 6 and 6, but is discharged to the engaging portion 5 side. It is disadvantageous in terms of soil. By the way, the present invention is not limited to the above embodiment, and can be appropriately changed in design.
For example, the number of the first guide protrusions of each core body is not limited to two, but may be three or more. FIG.
As shown in FIG. 5, two first guide projections 6 are formed on both left and right sides of the engaging portion 5 to arrange the first left and right first guide projections 6 and 6 side by side or in a staggered left and right manner (not shown). It is also possible. Further, as shown in FIG.
Two first guide projections 6 and 6 on one side and 3
The first guide projections 6, 6, 6 may be formed, and the respective guide projections may be arranged in a staggered manner.

[0025]

As described in detail above, according to the present invention,
Accumulation of mud and the like between the guide protrusions arranged at intervals in the circumferential direction can be prevented, and the running of the rolling wheels and the guide of the drive wheels can be performed properly.

[Brief description of the drawings]

FIG. 1 is a front sectional view (a sectional view taken along the line AA in FIG. 4) of an elastic crawler according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is an inner circumferential plan view of an elastic crawler.

FIG. 5 is a plan view of a core.

FIG. 6 is a front view of the core.

FIG. 7 is an enlarged front sectional view of an earth discharging surface according to another embodiment of the present invention.

FIG. 8 is an enlarged front sectional view of a discharging surface according to another embodiment of the present invention.

FIG. 9 is a plan view of a core according to another embodiment of the present invention.

FIG. 10 is a plan view of a core according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Elastic crawler 2 Crawler main body 4 Core body 5 Engagement part 6 First guide protrusion 7 Second guide protrusion 8 Wing part 9 Discharge surface

Claims (6)

(57) [Claims] An endless belt-shaped crawler body (2) made of an elastic material is buried at intervals in a circumferential direction, and a driving wheel (S) for driving the crawler body (8) to rotate is engaged. And a plurality of guide projections projecting from the left and right sides of the engaging portion (5) to the inner peripheral side of the crawler body (2) and provided at intervals in the circumferential direction. 6,
6) and a wing portion (8) extending outward from the left and right sides of the guide projections (6, 6), the groove bottom between the guide projections (6, 6). A core body for an elastic crawler, characterized in that an earth discharging surface (9) is formed of a slanted surface in the left-right direction which allows the mud and the like that have intruded into the space to be discharged. 2. The elastic crawler core according to claim 1, wherein the earth discharging surface (9) is formed as an inclined surface such that the inner side in the left-right direction is higher and the outer side is lower. 3. The engaging portion (5) is formed so as to protrude from the wing portion (8) to the inner peripheral side of the crawler body (2),
The said discharge surface (9) was formed in the inclined surface from the top surface of the said engaging part (5) to the surface of the inner peripheral side of the said wing part (8), The claim 2 characterized by the above-mentioned. Core for elastic crawler. 4. The elastic crawler core according to claim 1, wherein the earth discharging surface is formed in a concave arc surface. 5. The guide projections (6, 6) are provided on the left and right sides of the engagement portion (5) in two circumferential directions, and are provided on the left and right other sides of the engagement portion (5) and the guide projections (6). The elastic crawler core according to any one of claims 1 to 4, wherein one second guide protrusion (7) is provided at a position corresponding to the position between (6) and (6). 6. A crawler body (2) formed in an endless belt shape from an elastic material, and a core (4) embedded in the crawler body (2) at intervals in a circumferential direction. The core body (4) includes an engaging portion (5) with which a driving wheel (S) for driving the crawler body (2) to rotate is engaged, and a left-right side portion of the engaging portion (5). An elastic crawler having a plurality of guide projections (6, 6) projecting inward from the inner circumferential surface (2a) of the crawler body (2) and provided at intervals in the circumferential direction. The engaging portion (5) is formed so as to protrude inward from the inner peripheral surface (2a) of the crawler body (2), and the engaging portion (5) is formed at the bottom of the groove between the guide projections (6, 6). An elastic crawler characterized in that an inclined surface (9) is formed from the top surface of (5) to the inner peripheral surface (2a) of the crawler body (2).