JP4646456B2 - Footboard - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a crawler plate suitable for use in a tracked vehicle such as a construction machine or an agricultural machine, and more specifically, an iron crawler plate attached to a crawler belt link connected to each other by a connecting pin, and the iron crawler plate The present invention relates to a footwear board provided with an elastic body footboard attached to the grounding surface side and having an elastic body coated and bonded to a core metal.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a crawler track for a tracked vehicle such as a bulldozer, a structure in which an iron crawler plate is bolted to a crawler belt link that is connected to each other via a bush and a pin is known. The iron crawler belt is wound around a plurality of rolling wheels disposed above and below the track frame, and is configured to be driven by driving of the starting wheel.
[0003]
However, in vehicles equipped with such iron crawler belts, the road surface is damaged when working on the paved road surface or traveling on the paved road surface. A structure in which an elastic body is bonded, or an elastic body plate in which an elastic body such as rubber is bonded to a core metal is bolted to a crawler belt link together with an iron track board (see, for example, Utility Model Registration No. 2595443) Is used. Of these, in the latter case, the elastic footwear is detachable from the iron footwear, so only the elastic footwear is removed without removing the iron footwear when the elastic material is worn or damaged. There is an advantage that cost can be reduced and workability can be improved.
[0004]
[Problems to be solved by the invention]
However, in a crawler track having a structure in which an elastic crawler plate is fastened to a crawler belt link together with an iron crawler plate, excavated earth and sand enters between the left and right crawler belt links during the excavation work by the construction machine vehicle, Alternatively, when used on a snowy road surface in winter, snow on the road surface enters between the left and right crawler belt links, and a phenomenon (called a packing phenomenon) occurs in which the earth and sand or snow that has entered is compressed by a sprocket or the like. There was a problem. When such a packing phenomenon occurs, the sprocket or idler cannot mesh with the crawler belt link, and so-called crawler detachment occurs.
[0005]
The present invention has been made in view of such problems, and even if earth or sand or snow enters between the crawler belt links, the earth or sand or the like can be discharged before the packing phenomenon occurs. It is an object of the present invention to provide a footboard that can prevent the above-mentioned problem.
[0006]
[Means for solving the problems and actions / effects]
In order to achieve the above-mentioned object, the footwear according to the present invention comprises:
An iron crawler plate attached to a crawler belt link connected to each other by a connecting pin, and an elastic crawler plate attached to the grounding surface side of the iron crawler plate and having an elastic body coated and bonded to a core metal. In the board,
Protrusions made of an elastic material are provided so as to protrude into a space surrounded by the left and right crawler belt links and the front and rear connecting pins , and so that the upper portion thereof overlaps the connecting pins in a front view. (First invention).
[0007]
According to the present invention, even if earth and sand or snow on the road surface enters the space surrounded by the left and right crawler belt links and the front and rear connecting pins, and these earth and sand or snow is compacted by a sprocket or the like, the earth and sand and snow are compressed by the compaction. When the protruding portion is removed from the sprocket or the like, it is extended to its original state by its own restoring force, so that earth and sand and snow that have entered the space are discharged from the space. In this way, earth, sand, snow, etc. that have entered between the crawler belt links are discharged before the packing phenomenon occurs, and the occurrence of crawler slippage can be avoided.
[0008]
In the present invention, the core may be provided with a hole so that the elastic body and the protrusion are integrally formed (second invention), or the protrusion may be detachably attached to the core. You may make it do (3rd invention). If the elastic body and the metal core are integrally formed, there is an advantage that the elastic body track plate can be easily formed, and if the protrusion is detachably attached, the protrusion is damaged when the protrusion is damaged. There is an advantage that only can be exchanged, and the exchange can be easily performed.
[0009]
In each of the above inventions, a hollow portion can be provided in the protrusion (fourth invention). By doing so, the rigidity of the protruding portion is lowered and the protruding portion is easily bent when subjected to a pressing force.
[0010]
Further, the surface of the protrusion may be made of an elastic body harder than the internal elastic body, or may be covered with a covering member made of iron or resin (fifth invention). According to such a configuration, even if stones or the like are caught between the crawler belt links, the protrusion is deformed because the surface of the protrusion is covered with the hard elastic body or the covering member made of iron or resin. It is possible to prevent the surface and chipping.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, specific embodiments of the footwear according to the present invention will be described with reference to the drawings.
[0012]
FIG. 1 shows a plan view (a) and a front view (b) showing a crawler plate according to the first embodiment of the present invention attached to a crawler belt link, and FIG. A side view is shown. FIG. 3 shows a plan view (a), a front view (b), and a bottom view (c) of an elastic body foot plate constituting a part of the footwear plate of the present embodiment, and FIG. The side view (a) and AA sectional view (b) of FIG. 3 (b) are shown respectively. Further, FIG. 5 is a plan view (a) and a cross-sectional view BB (b) and a cross-sectional view CC (c) of (a) and (a) of the iron track plate constituting a part of the track plate of the present embodiment. Are shown respectively. FIG. 6 shows a meshing portion with the sprocket.
[0013]
The crawler plate 1 of the present embodiment includes an iron crawler plate 4 attached to the crawler belt link 2 by a plurality of (four in this embodiment) bolts 3a and nuts 3b, and a grounding surface side of the iron crawler plate 4 And an elastic body foot plate 6 attached by a plurality of bolts 5 (four in this embodiment). The crawler plate 1 has an iron crawler plate 4 attached to the crawler belt link 2 and an elastic crawler plate 6 attached to the iron crawler plate 4 so that the iron crawler plate 4 and the elastic crawler plate 6 are connected. An endless track band is configured as a whole by connecting a plurality of crawler belt links 2 adjacent to each other so as to be rotatable by connecting pins 7 arranged in parallel in the crawler traveling direction. Thus, the crawler belt link 2 is engaged with and driven by a sprocket 15 to be described later, so that the endless track is rotationally driven and the vehicle is driven. Of course, if the elastic body plate 6 is removed, the iron track 4 alone can be used for traveling.
[0014]
The iron plate 4 has lugs 4a, 4b, 4c at the center and both sides along the longitudinal direction of the tread surface. In addition, the iron crawler plate 4 is provided with a bolt insertion hole 8 through which a bolt 3a for attaching the iron crawler plate 4 to the crawler belt link 2 is inserted at the center portion, and at positions closer to both ends in the longitudinal direction. A bolt insertion hole 9 is provided through which a bolt 5 for attaching a core metal 11 of an elastic shoe plate 6 to be described later to the iron shoe plate 4 is inserted. Furthermore, substantially trapezoidal through-holes 10 whose corners are chamfered are formed at positions surrounded by the four bolt insertion holes 8 in the iron plate 4.
[0015]
The elastic body cover plate 6 is configured by covering and adhering an elastic body 12 such as rubber to a core metal 11. The core metal 11 is made of a material having high rigidity so as not to be deformed even if the weight of the vehicle body is applied, for example, a general metal core material such as steel, cast steel, cast iron, or the like, a metal composite material, a non-metal composite material, or the like. It is composed of. The core bar 11 is formed with ridges 11a, 11b, 11c along the longitudinal direction in accordance with the lug shape of the iron shoe 4 at the center and both sides of the surface, and both ends in the longitudinal direction. A mounting seat 11d of the bolt 5 is formed at a position near the portion, and a screw hole 11e is provided in the mounting seat 11d. The cored bar 11 is formed with a circular through hole 13 at the center in the longitudinal direction. Here, the grounding surface side of the cored bar 11 is formed into a completely flat surface, so that stress concentration due to distortion of the elastic body 12 does not occur.
[0016]
On the other hand, the elastic body 12 is made of a relatively soft material such as rubber, urethane, resin, elastomer, and non-metallic composite material. When embedding the core metal 11 in the elastic body 12, for example, when the elastic body 12 is rubber, a general method such as vulcanization adhesion is used. The elastic body 12 has a recess 12a at the center in the longitudinal direction on the grounding surface side, and both end portions and both side portions are inclined surfaces 12b and 12c inclined at a required angle toward the non-grounding surface side.
[0017]
The elastic body 12 has a protrusion 14 on the non-grounding surface side of the central portion, and the protrusion 14 is formed in the through hole 13 formed in the core metal 11 and the iron shoe 4. The crawler belt links 2 and 2 protrude through the through hole 10. The projecting portion 14 has a substantially semicircular head in a longitudinal section parallel to the crawler belt link 2 and has a divergent shape as it goes downward, and its top portion is 1 / of the height of the crawler belt link 4. It has reached a position exceeding 2.
[0018]
In the present embodiment, as the material of the protrusion 14, in other words, the elastic body 12, rubber having a hardness of 0 ° C. using JIS A H _S 50-80 rubber fulfills the functions described later of the protrusion 14. Is preferable.
[0019]
In the crawler plate 1 of the present embodiment having the above-described configuration, the protruding portion 14 of the elastic body 12 is shown in FIGS. 1 and 2 at a portion where the crawler belt link 2 does not mesh with the sprocket 15 (see FIG. 6). As shown, the left and right crawler belt links 2, 2 and the front and rear connecting pins 7, 7 protrude into a space. In this state, when dirt or snow on the road surface enters the space as the vehicle travels, the crawler belt links 2 and 2 mesh with the sprocket 15 as shown in FIG. Therefore, earth and sand, snow, and the like in the space are pressed and compressed by the sprocket 15 and the like at the time of the meshing, and the projecting portion 14 is compressed by the pressed earth and sand and snow. Thus, when the crawler belt links 2 and 2 reach the part removed from the sprocket 15 or the like, the pressing force by the sprocket 15 or the like is released, so that the protrusion 14 is extended until it returns to its original shape by its own restoring force, As a result, the earth, sand, snow, and the like that have been consolidated are discharged from the space. In this way, earth, sand, snow, etc. that have entered between the crawler belt links 2 and 2 are discharged before the packing phenomenon occurs, and the occurrence of crawler slippage is prevented.
[0020]
In FIG. 6, if the height of the projecting portion 14 is set so that the projecting portion 14 first contacts the tooth bottom immediately before the connecting pin (crawler belt bushing) 7 contacts the tooth bottom of the sprocket 15, The hitting sound caused by the connecting pin 7 is eliminated and a low-noise crawler belt can be obtained.
[0021]
FIG. 7 shows a plan view (a), a front view (b), and a side view (c) representing the crawler plate according to the second embodiment of the present invention attached to the crawler belt link. Further, FIG. 8 shows a plan view (a), a front view (b), and a side view (c) of an elastic shoe plate constituting a part of the shoe plate of the present embodiment, respectively. Further, FIG. 9 is a plan view (a), a DD cross-sectional view (b) and a EE cross-sectional view (c) of an iron shoe plate constituting a part of the shoe plate of the present embodiment. Are shown respectively.
[0022]
In this embodiment, the basic configuration is not different from that of the first embodiment. Accordingly, the same reference numerals are given to the parts common to the first embodiment, and the detailed description thereof is omitted.
[0023]
In the first embodiment, the iron shoe plate 4 has a shape (triple grouser shoe) having three lugs, but in the second embodiment, the lug 4b provided on the iron shoe plate 4A. , 4c is a double grouser shoe with only two strips. Further, the center part of both ends of the iron shoe plate 4A is formed so as to protrude along the elastic shoe plate 6A and is bent toward the non-grounding surface side.
[0024]
On the other hand, in the elastic body shoe plate 6A, both ends of the core metal 11A are bent and formed on the non-ground surface side to be inclined surfaces, and have a shape having notches 16 for fastening bolts on both sides of the center portion. Has been.
[0025]
In the double-grocer type iron crawler plate 4A as in the present embodiment, it is not necessary to increase the thickness of the core metal in order to avoid interference with the lug at the center as in the first embodiment. Since the thickness can be reduced, there is an advantage that the thickness of the elastic body 12 can be increased.
[0026]
In each of the above embodiments, the shape of the through hole 13 formed in the cored bar 11 for coupling the elastic body of the protrusion 14 to the elastic body main body has been described as a circular shape. It is not necessary to limit to a circular shape, and it may be a long hole or an elliptical hole.
[0027]
FIG. 10 shows a front view (a), a bottom view (b), and a side view (c) of an elastic shoe board of a shoe board according to a third embodiment of the present invention. Also in this embodiment, the same reference numerals are given to the portions common to the first embodiment, and detailed description thereof is omitted.
[0028]
In the present embodiment, both ends of the core metal 11B in the elastic body shoe 6B are bent to the non-grounding surface side, and the non-grounding surface sides of both ends are covered with the elastic body 12, and this core An elastic body constituting the protrusion 14 is bonded to the upper surface of the central portion of the gold 11B by a method such as vulcanization bonding. Even with such a configuration, the same effects as those of the above-described embodiments can be obtained.
[0029]
In the present embodiment, the protrusion is bonded to the lug-side elastic body. However, as shown in FIG. 11, the protrusion 14 is configured to be detachable from the lug-side elastic body. You can also In the illustrated example, the protrusion 14 is bonded to a metal plate 17, and the metal plate 17 is fixed to the core metal 11 with a plurality of bolts 18. According to such a configuration, when the protruding portion 14 is damaged, the bolt 18 can be removed, and only the protruding portion 14 can be removed and easily replaced with a new protruding portion.
[0030]
FIG. 12 shows an exploded front view (a) and an exploded side view (b) of the footwear plate according to the fourth embodiment of the present invention. Also in this embodiment, the same reference numerals are given to the portions common to the first embodiment, and detailed description thereof is omitted.
[0031]
In the present embodiment, screw portions 19 are integrally formed on the upper surface of a core metal 11C (indicated by oblique lines) in the elastic body shoe plate 6C, and these screw portions 19 are formed in the through holes 9 formed in the iron shoe plate 4C. The nuts 20 are inserted and coupled to each other. The threaded portion 19 is formed by die processing after being integrally formed with the core metal 11C by means of forging, casting, cutting, or the like.
[0032]
FIG. 13 shows a front view (a) and partially enlarged views (b) and (c) of an elastic body shoe according to the fifth embodiment of the present invention. Also in this embodiment, the same reference numerals are given to the portions common to the first embodiment, and detailed description thereof is omitted.
[0033]
In the present embodiment, a counterbored portion 21 is provided on the grounding surface side of the metal core 11D to embed the head portion of the bolt 5, and the periphery of the bolt head portion is welded (shaded portion in FIGS. 13B and 13C). It is made to adhere by. In addition, after embedment of the bolt, it is preferable to finish with a grinder or the like so that the lower surface of the core metal 11D and the bolt head surface are flush with each other.
[0034]
Further, when the cored bar is produced by forging or casting, as shown in FIG. 13 (d), the bolt 5 can be prevented from rotating by forming the counterbore 21A in a hexagonal shape. Need not be fixed by welding.
[0035]
In each of the above embodiments, the description has been given of the shape of the cross section of the head portion of the protrusion 14 formed in a substantially semicircular shape, but various shapes such as a substantially rectangular cross section can be adopted as the shape of the protrusion. it can. Further, as shown in FIG. 14A, a hollow portion (hollow portion) 22 having a circular cross section (not limited to a circular shape) may be provided in the central portion of the protrusion 14A. When the hollow portion 22 is provided in this manner, the rigidity of the protruding portion 14A is reduced, and the protruding portion 14A is easily bent when subjected to a pressing force.
[0036]
Further, as shown in FIG. 14 (b), the rubber constituting the protrusion main body and the rubber constituting the surface are changed to form a two-layer structure, and the protrusion main body is a soft rubber (soft elastic body) layer. 23, the surface can also be constituted by a hard rubber (hard elastic body) layer 24. With this configuration, even if stones or the like are caught between the crawler belt links, the surface of the protrusion is covered with the hard rubber layer 24, so that the protrusion is deformed or the surface is chipped. Can be prevented.
[0037]
Moreover, as shown in FIG. 14C, a configuration in which a covering member 25 made of iron or resin is bonded to the surface of the protrusion may be employed instead of the rubber having a two-layer structure.
[Brief description of the drawings]
FIG. 1 is a plan view (a) and a front view (b) showing a crawler plate according to a first embodiment of the present invention attached to a crawler belt link.
FIG. 2 is a side view of the crawler plate according to the first embodiment.
FIG. 3 is a plan view (a), a front view (b), and a bottom view (c) of an elastic body foot plate constituting a part of the foot plate according to the first embodiment.
FIG. 4 is a side view (a) of an elastic body foot plate constituting a part of the foot plate according to the first embodiment, and a cross-sectional view (A) taken along line AA of FIG. 3 (b).
FIG. 5 is a plan view (a), a BB cross-sectional view (b) and a CC cross-sectional view of the iron track board constituting a part of the track board according to the first embodiment; (C).
FIG. 6 is a view showing a meshing portion of a shoe board with a sprocket according to the first embodiment.
FIG. 7 is a plan view (a), a front view (b), and a side view (c) showing a crawler plate according to a second embodiment of the present invention attached to a crawler belt link.
FIG. 8 is a plan view (a), a front view (b), and a side view (c) of an elastic body foot plate that constitutes a part of the foot plate according to the second embodiment.
FIG. 9 is a plan view (a), a DD sectional view (b) and an EE sectional view of an iron shoe board constituting a part of the shoe board according to the second embodiment; (C).
FIG. 10 is a front view (a), a bottom view (b), and a side view (c) of an elastic footwear for a footwear according to a third embodiment of the present invention.
FIG. 11 is a diagram illustrating an example in which a protrusion is detachable.
FIG. 12 is an exploded front view (a) and an exploded side view (b) of a footwear plate according to a fourth embodiment of the present invention.
FIG. 13 is a front view (a), partially enlarged views (b) and (c), and a modified example (d) thereof, of an elastic body footwear plate according to a fifth embodiment of the present invention.
FIGS. 14A, 14B, and 14C are views showing modifications of the protrusions. FIGS.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crawler board 2 Crawler belt link 4, 4A, 4C Iron crawler board 6, 6A, 6C Elastic body board 7 Connection pin 8, 9 Bolt insertion hole 10, 13 Through-hole 11, 11A, 11B, 11C, 11D Core metal 11d Attachment Seat 11e Screw hole 12 Elastic body 14, 14A Protrusion 15 Sprocket 22 Hollow 23 Soft rubber layer 24 Hard rubber layer 25 Cover member

Claims (5)

An iron crawler plate attached to a crawler belt link connected to each other by a connecting pin, and an elastic crawler plate attached to the grounding surface side of the iron crawler plate and having an elastic body coated and bonded to a core metal. In the board,
A crawler board comprising a protrusion made of an elastic material so as to protrude into a space surrounded by left and right crawler belt links and front and rear connecting pins , and so that an upper portion thereof overlaps the connecting pins in a front view .   The footwear according to claim 1, wherein the cored bar is provided with a hole so that the elastic body and the protrusion are integrally formed.   The footwear according to claim 1, wherein the protrusion is detachably attached to the cored bar.   The footwear plate according to any one of claims 1 to 3, wherein a hollow portion is provided in the protruding portion.   5. The footwear according to claim 1, wherein a surface of the protrusion is made of an elastic body harder than an internal elastic body, or is covered with a covering member made of iron or resin.

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