JPH0620175U - Crawler - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a crawler that achieves both prevention of vibration and ensuring of flexibility. [Structure] One end of a grounding lug 14 on one side of an engagement hole 8 is superposed on the front edge of a cored bar 2, and an inclined surface 16 is formed at least on the other end. 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 cored bar 2, and the inclined surface 16 is also formed at least on the other end. Further, a part of the inclined surface 16 of the grounding lug 14 on one side of the engaging hole 8 and the other side of the engaging hole 8 in the longitudinal direction of the belt is arranged so as to intersect with each other to prevent vibration and ensure flexibility.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a crawler, which is made of an elastic material such as rubber and has an endless belt shape, is wound between a drive wheel and an idle wheel, and is used in a crawler vehicle.

[0002]

[Prior art]

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

[0003]

[Problems to be solved by the device]

 With such a conventional type, when traveling on a soft ground such as a field or a rice field, it was possible to achieve both the vibration suppression effect and the soil removal property. However, when an endless track vehicle travels on a hard road surface such as 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 the rigidity of the cored bar is also increased. Therefore, the crawler does not deform. However, when the idle wheel passes between the central lug and the side lug, the crawler is thin and the crawler elastically deforms, and the idle wheel falls between them, causing the work vehicle to vibrate. However, there was a problem that the vibration suppression effect was not sufficient.

On the other hand, if the gap between the lugs is made small and close to each other so that there is no gap between the lugs, the flexibility of the crawler is impaired, and the crawler can be wound around the drive wheel or the idler wheel. There is a problem that it becomes difficult and the running performance may be impaired. Therefore, the present invention has an object to solve the above-mentioned problems, and provides a crawler capable of both preventing vibration and ensuring flexibility.

[0005]

[Means for Solving the Problem] In order to achieve the above object, the present invention has the following configuration as a means for solving the problem. That is, it is formed of an elastic material in an endless band shape, and cores are embedded in the central part in the band width direction at predetermined intervals in the band longitudinal direction, and engaging holes are formed in the central part in the band width direction between the respective cores. In the crawler formed with the above, the grounding lugs are arranged on the grounding side 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 connected. While overlapping with the front edge of the cored bar, one end of the grounding lug on the other side of the engagement hole is overlapped with the rear edge of the cored bar, and further with one side of the engagement hole in the longitudinal direction of the band. That is the structure of the crawler characterized in that a part of the grounding lug on the other side is arranged so as to overlap between the cored bars.

[0006]

[Action]

 In the crawler having the above structure, a part of the grounding lug on one side of the engagement hole and a part of the grounding lug on the other side are bent and deformed according to the outer shape of the drive wheel. To do. When the idler wheel passes over the cored bar, the cored bar is supported by the ground lug to prevent the idler wheel from falling, and when the idler wheel passes between the grounded lugs. The ground lugs support the idler wheels, prevent the crawler from deforming, and suppress vibration.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail 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 portion, and the endless belt portion 1 is made of an elastic material such as rubber. In this endless band-shaped portion 1, cored bars 2 are embedded at a predetermined interval P at the central portion in the band width direction. In the present embodiment, the cored bar 2 includes a rectangular base portion 4 and a pair of chevron-shaped protrusions 6 protruding from the base portion 4 to the side opposite to the ground.

When the core metal 2 is used in a light-duty endless track vehicle, the core metal 2 may be composed of a base portion 4 on which the chevron projections 6 are not formed. It may be made of a press-molded metal plate or a hard resin. Further, a rectangular engaging hole 8 is formed between the cored bars 2 at the central portion in the band width direction. In this embodiment, the engagement holes 8 are formed so as to have a width substantially equal to the space between the cored bars 2.

Further, in the endless belt-shaped portion 1, a tensile reinforcing member 10 is embedded along the entire length of the endless belt-shaped portion 1 and on the ground side. The tensile reinforcing members 10 are provided on both sides of the engagement hole 8 along the core metal 2 so as to connect the core metals 2. In this embodiment, a large number of wires and fibers are bundled. Are used.

A surface corresponding to the tensile reinforcing member 10 is formed substantially flat on the anti-ground side of the endless belt portion 1 and a track 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. In this embodiment, the ground lugs 14 in one row of the engagement holes 8 are The ground lugs 14 on the other side of the line are formed to be shifted forward by 1/4 of the predetermined distance P with respect to the gold 2, and the ground lugs 14 on the other side are formed to be moved backward by 1/4 of the predetermined distance P with respect to the core metal 2. ing. Further, the width of the ground lug 14 is slightly larger than 1/2 of the predetermined interval P.

That is, one end of the grounding lug 14 on one side of the engaging hole 8 is overlapped with the front edge of the cored bar 2. Further, one end of the grounding lug 14 on the other side of the engagement hole 8 is overlapped with the rear edge of the core metal 2. Further, the ground lug 14 is formed with an inclined surface 16 so as to reduce its diameter toward the tip, and 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 formed on the opposite side to the raceway surface 12. 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 the present embodiment, the inclined surface 16 is provided over the entire circumference of the ground lug 14. However, the inclined surface 16 may be formed as needed, and at least the core metal 2 and the core metal 2 are provided. It suffices that one of the ground lugs 14 and a part of the other ground lug 14 between the two overlap with 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.

In the present embodiment, the crawler described above is wound between the drive wheel 22 and the idler wheel 24 of the aerial work vehicle 20, and the teeth 26 of the drive wheel 22 are engaged as shown in FIG. It is formed so as to engage with the dowel hole 8. Further, between the drive wheel 22 and the idler wheel 24, in this embodiment, three idler wheels 28 are provided so as to straddle the chevron projections 6 and contact both raceway surfaces 12. .

Next, the operation of the crawler of this embodiment described above will be described. First, when the drive wheel 22 is driven to rotate, 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 that time, the core metal 2 does not deform in an arc shape according to the outer shape of the drive wheel 22 due to its rigidity. Further, the portion where the grounding lug 14 is present, particularly the portion corresponding to the tip end surface 18, is particularly thick, so that it is difficult to deform. However, the inclined surface 16 of the ground lug 14 becomes thin, and the inclined surface 16 of the ground lug 14 on one side of the engagement hole 8 and the inclined surface 16 of the ground lug 14 on the other side intersect. The portion that is bent has a small thickness, and this portion bends and is deformed according to the outer shape of the drive wheel 22, and is wrapped around the drive wheel 22 to secure the flexibility of the crawler.

On the other hand, the idle wheel 28 rolls on the raceway surface 12 as the work vehicle 20 travels. When the idler wheel 28 passes over the cored bar 2, the cored bar 2 is supported by the one grounding lug 14 at its front edge and the other grounding lug 14 at its rear edge. 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 front end surface 18 and the front end surface 18, it is supported by the inclined surface 16.

The location where the two inclined surfaces 16 intersect has the lowest rigidity, but its width is narrow, and the idler wheel 28 also has a certain diameter, so that one ground lug 14 and the other ground contact are provided. Pass over the rug 14. Therefore, the idler wheel 28 is supported by the grounding lugs 14 on both sides, the fall of the idler wheel 28 is suppressed to a minimum, and the vibration of the aerial work vehicle 20 due to the fall of the idler 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]

[Effect of device]

 As described in detail above, the crawler of the present invention secures its flexibility and also suppresses the vibration due to the falling of the idler wheel, and it is possible to achieve both the vibration suppression and the flexibility ensuring. Has the effect.

[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)

[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 cored bars, grounding lugs are arranged on the grounding side on both sides of the engaging holes according to the intervals of 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. Further, the crawler is characterized in that a part of the grounding lug on one side of the engagement hole and a part of the other side of the engagement hole in the longitudinal direction of the belt are arranged so as to overlap each other between the cored bars.