JP2020203624A - Shoe plate - Google Patents

Abstract

To provide a shoe plate capable of easily removing sediment deposited between projections.SOLUTION: A shoe plate includes a shoe plate body 20, and three projections 30A, 30B, and 30C that project out from a ground surface 20a of the shoe plate body 20 and extend in a direction W intersecting a traveling direction L of the shoe plate body 20, and are disposed at intervals in the traveling direction L. Among the three projections, the first projection 30A and the second projection 30B disposed on fore and aft in the traveling direction L have a plurality of notch portions 31a and 31b penetrating the first projection 30A and the second projection 30B in the traveling direction L at intervals in the direction W intersecting the traveling direction L. The notch portions 31a and 31b are notched from end portions in a height direction of the first projection 30A and the second projection 30B to the ground surface 20a.SELECTED DRAWING: Figure 3

Description

The present invention relates to a shoe plate constituting a lower traveling body of a work machine.

Conventionally, in a work machine such as a hydraulic excavator, a plurality of shoe plates are annularly connected to a crawler type lower traveling body by a connecting material.

The shoe plate has a plurality of protrusions called grousers extending on the ground contact surface side in a direction intersecting the traveling direction of the work machine, and these protrusions stabilize the traveling. Sediment tends to accumulate in the grooves between the protrusions on the ground plane side of the shoe plate. The earth and sand accumulated in the ditch is firmly compacted by the running of the work machine, and the operator removes the earth and sand by hitting the back side of the shoe plate with a hammer or infiltrating water with a high pressure washer or the like. However, it took a lot of time and effort.

Patent Document 1 discloses a shoe plate having a notch in a protrusion. In this shoe plate, a jig such as a rod is inserted into a notch provided in the protrusion to separate the sediment accumulated between the protrusions.

JP-A-2002-29462

However, in the shoe plate as in Patent Document 1, since the depth of the notch is shallow, it is not easy to insert a jig or infiltrate water, and it is not possible to sufficiently remove earth and sand. Further, the notches provided in all the protrusions are provided at the same positions in the direction orthogonal to the traveling direction. Therefore, the force pressed by a jig such as a rod inserted from the notch is mainly transmitted in the insertion direction and is difficult to be transmitted in the other direction, so that the earth and sand between the protrusions cannot be efficiently separated. Furthermore, since the notches are provided in all the protrusions, the cross-sectional area at the notches becomes smaller, which may reduce the strength of the shoe plate.

The present invention has been made in view of this point, and an object of the present invention is to provide a shoe plate capable of easily removing sediment accumulated between protrusions.

In order to achieve the above object, in the present invention, notches are provided in the front and rear protrusions in the traveling direction, and the depth of the notches reaches the ground contact surface.

Specifically, in the first invention, the shoe plate is
The shoe plate main body and three protrusions protruding from the ground contact surface of the shoe plate main body, extending in a direction intersecting the traveling direction of the shoe plate main body, and arranged at intervals in the traveling direction are provided. Of the three protrusions, the first protrusion and the second protrusion arranged before and after the traveling direction intersect the traveling direction with a notch penetrating the first protrusion and the second protrusion in the traveling direction. There are a plurality of notches at intervals in the direction of the above, and the notches are notched from the ends of the first protrusion and the second protrusion in the height direction until they reach the ground contact surface.

According to the above configuration, when the protrusion is provided with a notch that is cut out until it reaches the ground plane, and the earth and sand accumulated between the protrusions is removed by using a rod-shaped tool or the like, the tool or the like is cut out. Can be inserted along the ground plane from. Further, when pressurized water is used, water can be allowed to enter the ground contact surface through the notch. In either case, since the position close to the ground plane can be used as the starting point of the cracks in the earth and sand, it becomes easy to separate the earth and sand, and workability can be improved.

Further, by providing the notches in the first protrusion and the second protrusion arranged in the front and rear in the traveling direction, the tip of the tool or the like inserted from the notch of the first protrusion or the second protrusion is the first. It collides with a protrusion located between the first protrusion and the second protrusion. The force applied to the tool, etc. collides with the protrusion located between the first protrusion and the second protrusion, and is propagated in the direction intersecting the insertion direction of the tool, etc. Can be removed more effectively.

In the second invention, in the first invention, the third protrusion arranged between the first protrusion and the second protrusion is more advanced than the first protrusion and the second protrusion. The size in the direction is large.

According to the above configuration, the third protrusion is made larger in the traveling direction than the first protrusion and the second protrusion, so that the cross-sectional area in the width direction of the shoe plate reduced by providing the notch can be obtained. It becomes possible to secure, and the risk to the strength of the shoe plate can be reduced.

In the third invention, in the first or second invention, the cutout portion is composed of the first cutout portion provided in the first protrusion portion and the second cutout portion provided in the second protrusion portion. Therefore, the first notch portion and the second notch portion are arranged alternately in a direction intersecting the traveling direction.

According to the above configuration, it is possible to secure the cross-sectional area in the width direction of the shoe plate that has been reduced by providing the notch portion, and it is possible to more effectively reduce the risk to the strength of the shoe plate.

As described above, according to the present invention, the earth and sand are easily separated by providing the notch so as to reach the ground contact surface from the end portion in the height direction of the first protrusion and the second protrusion. It becomes possible and workability can be improved. Further, by providing the notches in the first protrusions and the second protrusions arranged in the front and rear in the traveling direction, the earth and sand between the protrusions can be more effectively separated.

An embodiment of the present invention is shown, and is a side view of a hydraulic excavator provided with a crawler type lower traveling body. It is a partially enlarged view of FIG. It is a perspective view which shows the shoe plate which concerns on embodiment of this invention. It is a side view which shows the shoe plate which concerns on embodiment of this invention. It is a bottom view which shows the shoe plate which concerns on embodiment of this invention. It is a bottom view which shows the shoe plate which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its application or its use.

In the present specification, the ground contact surface side facing the ground is referred to as the "outer peripheral side" and the back side of the ground contact surface is referred to as the "inner peripheral side" with reference to the state in which the shoe plate is incorporated in the lower traveling body.

Further, in FIG. 3, the traveling direction L of the shoe plate main body and the width direction W of the shoe plate main body are indicated by arrows. Unless otherwise specified, explanations will be given in the directions indicated by these arrows. The "direction intersecting the traveling direction" refers to a direction excluding the traveling direction L, and includes a direction orthogonal to the traveling direction L. In the present specification, the direction intersecting the traveling direction L is the width direction W.

As shown in FIG. 1, the work machine 1 is, for example, a hydraulic excavator, and includes a crawler type lower traveling body 2 and an upper rotating body 3 rotatably mounted on the lower traveling body 2. A cab 4 is arranged on the swivel frame 5 of the upper swivel body 3, and an attachment 6 for performing excavation work or the like is attached to the front of the swivel frame 5.

The lower traveling body 2 includes drive wheels 7 and idle wheels 8 at the rear end and the front end, respectively. A crawler 9 is hung on the drive wheel 7 and the idle wheel 8.

FIG. 2 is a partially enlarged view of FIG. 1 and is a schematic view showing the periphery of the drive wheels 7. As shown in FIG. 2, the crawler 9 is composed of a plurality of shoe plates 10 and a connecting member 11. The shoe plate 10 has a ground contact surface 20a facing the ground on the outer peripheral side of the crawler 9. The adjacent shoe plates 10 are connected by the connecting member 11 from the inner peripheral side.

FIG. 3 is a perspective view showing the shoe plate according to the embodiment of the present invention from the outer peripheral side. In FIG. 3, the arrow L indicates the traveling direction of the shoe plate main body 20, in other words, the traveling direction of the work machine 1. Further, the arrow W is a direction intersecting the arrow L and indicates the width direction of the shoe plate main body 20. In the present embodiment, the direction W intersecting the traveling direction L of the shoe plate main body 20 is substantially orthogonal to the traveling direction L, but is not necessarily orthogonal to the traveling direction L.

The shoe plate 10 protrudes from the shoe plate main body 20 and the ground contact surface 20a of the shoe plate main body 20, extends in the direction W intersecting the traveling direction L of the shoe plate main body 20, and is arranged at intervals in the traveling direction L3. It includes two protrusions 30A, 30B, and 30C. The protrusions 30A, 30B, and 30C are sometimes called grousers, and the shoe plate 10 according to the embodiment of the present invention is a so-called triple grouser type shoe plate.

The shoe plate main body 20 has a rectangular shape in a plane, and when assembled to the lower traveling body 2, the surface facing the outer peripheral side is the ground contact surface 20a facing the ground. Three protrusions 30A, 30B, and 30C project from the ground plane 20a toward the outer peripheral side. Further, the shoe plate main body 20 has a connecting hole 21 between the protrusions. A bolt is inserted into the connecting hole 21 from the outer peripheral side, and the connecting member 11 is fixed to the inner peripheral side, whereby the shoe plate 10 adjacent to the traveling direction L is connected.

Of the above three protrusions 30A, 30B, and 30C, the first protrusion 30A and the second protrusion 30B arranged before and after the traveling direction L have notches 31a and 31b, respectively. The third protrusion 30C located between the first protrusion 30A and the second protrusion 30B does not have a notch.

The notches 31a and 31b provided in the first protrusion 30A and the second protrusion 30B penetrate the first protrusion 30A and the second protrusion 30B in the traveling direction L, respectively. Further, the cutout portions 31a and 31b are cut out from the end portions (outer peripheral side end portions) of the first protrusion portion 30A and the second protrusion portion 30B in the height direction until they reach the ground contact surface 20a and intersect with the traveling direction L. A plurality of directions (width directions) W are provided at intervals. The bottom portions (inner peripheral side ends) of the notches 31a and 31b of the first protrusion 30A and the second protrusion 30B are flush with the ground plane 20a.

FIG. 4 is a side view showing a shoe plate according to an embodiment of the present invention. As shown in FIG. 4, the protrusions 30A, 30B, and 30C are arranged at intervals in the traveling direction L. Here, the dimensions of the protrusions 30A, 30B, and 30C in the traveling direction L are La, Lb, and Lc, respectively. The dimension Lc in the traveling direction L of the third protrusion 30C arranged between the first protrusion 30A and the second protrusion 30B is larger than the dimensions La and Lb of the first protrusion 30A and the second protrusion 30B. ..

Further, in the traveling direction L, the distance between the first protrusion 30A and the third protrusion 30C is Lac, the distance between the second protrusion 30B and the third protrusion 30C is Lbc, and the protrusions 30A, 30B, Let H be the height from the ground contact surface 20a of 30C to the outer peripheral side end portion. The distances Lac and Lbc between the protrusions are smaller than three times the height H of the protrusions 30A, 30B and 30C.

FIG. 5 is a bottom view showing a shoe plate according to an embodiment of the present invention. As shown in FIG. 5, in the present embodiment, four notches 31a and 31b are provided in the width direction W, but the number is not limited. Further, in the present embodiment, the notches 31a and 31b are provided substantially parallel to the traveling direction L, but if they penetrate the first protrusion 30A and the second protrusion 30B in the traveling direction L, respectively, the cutouts are formed. The angle at which 31a and 31b are provided is not limited, and may be provided diagonally with respect to the traveling direction L, for example. The dimensions of the notches 31a and 31b in the width direction W are not particularly limited, but may be wide enough to insert a tool or the like when removing the sediment accumulated between the protrusions.

The first notch 31a provided in the first protrusion 30A and the second notch 31b provided in the second protrusion 30B are provided at the same position in the width direction W, but overlap with the position of the connecting hole 21. It is desirable that the positions in the width direction W are staggered so as not to occur. The strength of the shoe plate 10 can be ensured by providing the positions of the cutouts 31a and 31b and the positions of the connecting holes 21 so as not to overlap in the width direction W.

In the present embodiment configured as described above, the protrusions 30A and 30C are provided with notches 31a and 31b notched from the end (outer peripheral end) in the height direction to reach the ground contact surface 20a. The bottoms (inner peripheral side ends) of the notches 31a and 31b of the first protrusion 30A and the second protrusion 30B are flush with the ground plane 20a. Therefore, when performing the work of removing the sediment accumulated between the protrusions, it is possible to insert a rod-shaped tool or the like from the cutouts 31a and 31b along the ground contact surface 20a, and the sediment can be removed efficiently and easily.

By providing the notches 31a and 31b in the first protrusions 30A and the second protrusions 30C arranged before and after the traveling direction L, the tips of the tools and the like inserted from the notches 31a and 31b are first. It collides with the third protrusion 30C located between the protrusion 30A and the second protrusion 30B. When colliding with the third protrusion 30C, the force applied to the tool or the like is propagated in the direction W intersecting the insertion direction of the tool or the like, so that the earth and sand between the protrusions can be more effectively separated.

Further, in the present embodiment, as shown in FIG. 4, the distances Lac and Lbc between the protrusions are smaller than three times the height H of the protrusions 30A, 30B and 30C. In the field of design engineering for shoe plates, if the distance between the protrusions of the shoe plate is three times or more the height of the protrusions, it is possible to always maintain traction without depositing earth and sand between the protrusions. Are known. However, even in the configuration as in the present embodiment in which the distance between the protrusions is smaller than three times the height of the protrusions and it is considered that earth and sand are likely to accumulate, the above effect is remarkably exhibited. To.

The dimension Lc in the traveling direction L of the third protrusion 30C arranged between the first protrusion 30A and the second protrusion 30B is from the dimensions La and Lb of the first protrusion 30A and the second protrusion 30B. Therefore, it is possible to secure the reduced cross-sectional area of the shoe plate 10 in the width direction W by providing the cutout portions 31a and 31b, and it is possible to reduce the risk to the strength of the shoe plate 10.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

That is, in the above embodiment, as shown in FIG. 5, the notches 31a and 31b provided in the first protrusion 30A and the second protrusion 30B are provided at the same positions in the width direction W, but FIG. In the other embodiment shown, the first notch portion 32a provided in the first protrusion portion and the second notch portion 32b provided in the second protrusion portion have a heavy position in the direction W intersecting the traveling direction L. They are staggered so that they do not become. By arranging the first notch portion 32a and the second notch portion 32b in a staggered pattern by shifting them in the width direction W in this way, the width direction W of the shoe plate 10 lowered due to the provision of the notches 31a and 31b. It becomes possible to secure the cross-sectional area of the shoe plate 10, and the risk to the strength of the shoe plate 10 can be reduced more effectively.

Although the work machine 1 is a hydraulic excavator, it is not particularly limited as long as it is a work machine including a crawler type lower traveling body 2.

1 Work machine
2 Lower running body
3 Upper swivel body
4 cab
5 swivel frame
6 attachment
7 drive wheels
8 idle wheel
9 crawler
10 shoe plate
11 Connecting member
20 Shoe plate body
20a ground plane
21 Connecting hole
30A 1st protrusion
30B 2nd protrusion
30C 3rd protrusion
31a, 31b Notch
32a 1st notch
32b 2nd notch

Claims (3)

Shoe plate body and
It is provided with three protrusions that protrude from the ground plane of the shoe plate body, extend in a direction intersecting the traveling direction of the shoe plate body, and are arranged at intervals in the traveling direction.
Of the above three protrusions, the first protrusion and the second protrusion arranged before and after the traveling direction make a notch penetrating the first protrusion and the second protrusion in the traveling direction in the traveling direction. Have multiple intervals in the direction of intersection with
The shoe plate is characterized in that the cutout portion is cut out from an end portion of the first protrusion portion and the second protrusion portion in the height direction until the contact patch is reached. In the shoe plate according to claim 1,
The shoe plate characterized in that the third protrusion arranged between the first protrusion and the second protrusion has a larger dimension in the traveling direction than the first protrusion and the second protrusion. .. In the shoe plate according to claim 1 or 2.
The notch is composed of a first notch provided in the first protrusion and a second notch provided in the second protrusion.
The shoe plate is characterized in that the first cutout portion and the second cutout portion are alternately arranged in a direction intersecting the traveling direction.

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