JP2502652Y2 - Crawler - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler which is formed of an elastic material such as rubber in an endless belt shape and is wound between a drive wheel and an idle wheel to be used in a crawler vehicle.

[0002]

2. Description of the Related Art Conventionally, various types have been known as improved crawler lug patterns used in tracked vehicles. For example, as disclosed in Japanese Utility Model Publication No. 59-21993, a central lug that overlaps with the cored bar projection area is formed on every other cored bar, and one side lug is formed on the front edge of the remaining cored bar. It is known to polymerize the other side lug to the trailing edge of the remaining core.

[0003]

With such a conventional device, when traveling on a soft ground such as a field or a paddy field, it is possible to achieve both the vibration suppressing effect and the soil discharging property. However, when the tracked vehicle runs on a hard road surface such as a paved road surface, when the idle wheel passes over the cored bar, the cored bar is supported by the central lug and the side lugs, and due to the rigidity of the cored bar, The crawler does not deform. However, when the idle wheel passes between the central lug and the side lug, the crawler is thin, the crawler elastically deforms, and the idle wheel falls between them, causing the work vehicle to vibrate, There was a problem that the vibration suppression effect was not sufficient.

On the other hand, in order not to create a gap between each lug,
If the distance between the lugs is made small and close to each other, the flexibility of the crawler is impaired, it becomes difficult to wind the crawler around the drive wheel or the idler wheel, and the traveling performance may be impaired. was there. Therefore, the present invention has an object to solve the above problems, and provides a crawler capable of both preventing vibration and ensuring flexibility.

[0005]

[Technical Means for Solving the Problems] In order to achieve such an object, the present invention has the following constitution as means for solving the problems. That is, it is formed of an elastic material in an endless band shape,
In a crawler in which cores are embedded in the central part in the band width direction at predetermined intervals in the longitudinal direction of the band, and an engaging hole is formed in the central part in the band width direction between the respective cores, the ground side is grounded. The lugs are arranged on both sides of the engagement hole in accordance with the interval of the core metal, and one end of the grounding lug on one side of the engagement hole is superposed on the front edge of the core metal, and the engagement is performed. Overlap one end of the grounding lug on the other side of the dowel hole with the trailing edge of the core metal,
Furthermore, with respect to the longitudinal direction of the strip, the one side and the other side
Forming an inclined surface on the side between the core bars of the ground lug with
That is the structure of the crawler characterized in that the skirt of the inclined surface is crossed between the cored bars .

[0006]

In the crawler having the above-mentioned structure, the inclined surface of the grounding lug on one side of the engaging hole and the inclined surface of the grounding lug on the other side are provided.
The intersection with and bends and deforms according to the outer shape of the drive wheel. When the idler wheel passes over the cored bar, the cored bar is supported by the grounding lug to prevent the idler wheel from falling, and
When the idle wheel passes between the ground lugs, the ground lug supports the idle wheel to prevent deformation of the crawlers and suppress vibration.

[0007]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a plan view from the ground side of a crawler according to an embodiment of the present invention. Reference numeral 1 denotes an endless belt-shaped portion, and the endless belt-shaped portion 1 is made of an elastic material such as rubber. In this endless belt-shaped portion 1, cored bars 2 are embedded at predetermined intervals P in the center portion in the belt width direction. In this embodiment, this core metal 2
Includes a rectangular base portion 4 and a pair of chevron protrusions 6 protruding from the base portion 4 to the side opposite to the ground.

The cored bar 2 may be composed of a base 4 having no chevron projections 6 when it is used in a light-duty tracked vehicle, and the cored bar 2 may be a casting or a press. It may be made of a molded metal plate or a hard resin. Further, a rectangular engaging hole 8 is formed between the cored bars 2 at the center in the band width direction. In the present embodiment, the engagement holes 8 are formed so as to have almost the width of the space between the cored bars 2.

Further, the endless strip portion 1 has a tensile reinforcing member 10 embedded along the entire length of the endless strip portion 1 and on the ground side. The tensile reinforcing member 10 is the core metal 2
Are provided on both sides of the engagement hole 8 so as to connect the cored bars 2 to each other, and in the present embodiment, a bundle of a large number of wires and fibers is used.

A surface corresponding to the tensile reinforcing member 10 is formed substantially flat on the anti-grounding side of the endless belt portion 1,
A raceway surface 12 is provided. On the ground side, a large number of ground lugs 14 are provided on both sides of the engagement hole 8 in parallel with the core metal 2 in rows.

The spacing of the ground lugs 14 is also the same as the predetermined spacing P of the core metal 2 in each row, and in this embodiment, the ground lugs 14 in one row of the engagement holes 8 are Money 2
With respect to the core bar 2, the grounding lugs 14 on the other side are formed rearward with respect to the core metal 2 by 1/4 of the predetermined interval P. . Moreover, the width of the ground lug 14 is slightly larger than 1/2 of the predetermined interval P.

That is, the grounding lug 14 on one side of the engaging hole 8
One end of the core metal is superposed on the front edge of the core metal 2. Further, one end of the grounding lug 14 on the other side of the engagement hole 8 is superposed on the rear edge of the core metal 2. Furthermore, the grounding lug 14 is formed with an inclined surface 16 so as to reduce its diameter toward the tip,
The tip surface 18 of the ground lug 14 is formed flat. It is preferable that a part of the tip surface 18 is formed so as to overlap the core metal 2.

The tip surface 18 is the raceway surface 12
Corresponding to, it is formed on the opposite side. Further, the hem portions of the inclined surface 16 of the ground contact lug 14 on one side of the engagement hole 8 and the inclined surface 16 of the ground contact lug 14 on the other side of the engagement hole 8 are shown in FIG. As shown in FIG.

In this embodiment, the inclined surface 16 is the ground contact lug 1.
4 is provided over the entire circumference, but this inclined surface 16
May be formed as necessary, and at least one of the grounding lugs 14 and a part of the other grounding lugs 14 between the cored bars 2 may overlap each other in the band longitudinal direction. . The ground lug 14 is integrally formed of the same elastic material as the endless belt portion 1.

The crawler described above is shown in FIG.
As shown in FIG. 1, the drive wheels 22 and idler wheels 2 of the aerial work vehicle 20 are shown.
4, the teeth 26 of the drive wheel 22 are formed so as to engage with the engagement holes 8. Also, the drive wheels 22
In the present embodiment, three idler wheels 28 are provided between the idler wheel 24 and the idler wheel 24 so as to be in contact with both raceway surfaces 12 while straddling the chevron projections 6, respectively.

Next, the operation of the crawler of this embodiment described above will be explained. First, when the drive wheel 22 is rotationally driven, the teeth 26 enter the engaging holes 8 and engage with each other, and circulate the crawler through the core metal 2. Due to the circulation of the crawler, the aerial work vehicle 20 starts traveling.

At this time, the core metal 2 is driven by the rigidity of the drive wheel 2 due to its rigidity.
According to the outer shape of No. 2, it does not deform in an arc shape. In addition, a portion where the grounding lug 14 is present, particularly a portion corresponding to the tip end surface 18, has a particularly large thickness, and thus is difficult to be deformed. However, the thickness of the inclined surface 16 of the ground lug 14 is reduced, and the engagement hole 8
The portion where the inclined surface 16 of the ground lug 14 on one side and the inclined surface 16 of the ground lug 14 on the other side intersect has a small thickness, and this portion bends to cause the drive wheel 22 to bend. Deforms according to the outer shape and wraps around the drive wheel 22 around the crawler,
The flexibility of the crawler is secured.

On the other hand, the free wheel 28 rolls on the raceway surface 12 as the work vehicle 20 travels. When the idle wheel 28 passes over the cored bar 2, the front edge of the cored bar 2 is supported by one grounding lug 14 and the rear edge is supported by the other grounding lug 14, so that the cored bar 2 is rigid. The idle wheel 28 passing over the core metal 2 does not fall between the ground lugs 14.

Furthermore, when the idle wheel 28 passes directly above the tip surface 18, the idle wheel 28 does not fall because the tip surface 18 is directly in contact with the paved road surface or the like. Then, when passing through the inclined surface 16 of the ground lug 14 between the tip surfaces 18 and 18, it is supported by the inclined surface 16.

The location where both slopes 16 intersect has the lowest rigidity, but its width is narrow, and the free wheel 28 also has a certain diameter, and the ground lug 14 on one side and the ground lug on the other side Pass through 14 and so on. Therefore, the idle wheel 28 is supported by the grounding lugs 14 on both sides, and the idle wheel 2
The fall of 8 is suppressed to the minimum, and the vibration of the aerial work vehicle 20 due to the fall of the idle wheel 28 is suppressed.

The present invention is not limited to such an embodiment as described above, and can be implemented in various modes without departing from the scope of the present invention.

[0022]

As described in detail above, the crawler of the present invention is formed so that the inclined surface of the ground lug intersects between the cored bars.
Therefore, it is possible to secure its flexibility, and also to suppress the vibration due to the falling of the idler wheel, and to suppress the vibration,
The effect of achieving compatibility with flexibility can be achieved.

[Brief description of drawings]

FIG. 1 is a partial plan view of a ground side of a crawler according to an embodiment of the present invention.

FIG. 2 is a view on arrow A in FIG.

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

FIG. 4 is an overall perspective view of the crawler of this embodiment.

FIG. 5 is a side view of an aerial work vehicle equipped with the crawler of this embodiment.

FIG. 6 is an enlarged side view of an idler wheel on the track of the crawler of this embodiment.

[Explanation of symbols]

1 ... endless strip 2 ... core metal 8 ...
Engagement hole 10 ... Tensile reinforcing member 12 ... Raceway surface 14
… Grounding lug 16… Inclined surface 20… Aerial work vehicle

Claims (1)

(57) [Scope of utility model registration request] 1. An endless belt-shaped member made of an elastic material, in which a core metal is embedded at a predetermined interval in a belt width direction central portion,
In addition, in the crawler in which the engaging holes are formed in the central portion in the band width direction between the respective cored bars, the grounding lugs are arranged on the grounding side on both sides of the engaging holes according to the interval between the cored bars. And one end of the grounding lug on one side of the engagement hole is overlapped with the front edge of the cored bar, and one end of the grounded lug on the other side of the engagement hole is overlapped with the rear edge of the cored bar. And further, the one side and the other side in the longitudinal direction of the belt.
Forming an inclined surface on the side between the core bars of the ground lug with
A crawler characterized in that the skirt of an inclined surface is crossed between the cores .