JP7279535B2 - shoe plate - Google Patents

Description

The present invention relates to a shoe plate that constitutes an undercarriage of a working machine.

2. Description of the Related Art Conventionally, in a working machine such as a hydraulic excavator, a plurality of shoe plates are annularly connected to a crawler-type undercarriage by connecting members.

On the shoe plate, a plurality of projections called grousers extend in a direction intersecting with the traveling direction of the work machine on the side of the ground contact surface, and these projections stabilize running. On the side of the contact surface of the shoe plate, dirt tends to accumulate in the grooves between the protrusions. The sediment accumulated in the groove is firmly compacted by the running of the work machine, and the worker removes the sediment by hitting the back side of the shoe plate with a hammer or letting water infiltrate with a high pressure washer. However, it took a lot of time and effort.

Patent Literature 1 discloses a shoe plate in which a projection is provided with a notch. In this shoe plate, a jig such as a rod is inserted into a notch provided in the projection to release the sediment accumulated between the projections.

Japanese Patent Application Laid-Open No. 2002-29462

However, in the shoe plate as disclosed in Patent Document 1, since the depth of the notch is shallow, it is not easy to insert jigs or enter water, and it is not possible to sufficiently remove earth and sand. Moreover, the cutouts provided in all the protrusions are provided at the same position in the direction orthogonal to the traveling direction. Therefore, the pressing force of a jig such as a rod inserted through the notch is transmitted mainly in the insertion direction and is difficult to be transmitted in other directions, so that the earth and sand between the projections cannot be removed efficiently. Furthermore, since the cutouts are provided in all the projections, the cross-sectional area of the cutouts becomes smaller, which may reduce the strength of the shoe plate.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shoe plate capable of easily removing the sediment accumulated between projections.

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

Specifically, in the first invention, the shoe plate is
a shoe plate body; and three protrusions projecting from the ground contact surface of the shoe plate body, extending in a direction intersecting with the advancing direction of the shoe plate body, and arranged at intervals in the advancing direction, Of the two protrusions, the first protrusion and the second protrusion arranged in front of and behind the direction of travel have a notch that penetrates the first protrusion and the second protrusion in the direction of travel, and intersects the direction of travel. The cutout portions are cut from the end portions in the height direction of the first projection portion and the second projection portion to reach the ground contact surface.

According to the above configuration, since the notch is provided in the protrusion until it reaches the ground contact surface, when removing the sediment deposited between the protrusions using a rod-shaped tool or the like, the tool or the like can be removed from the notch. can be inserted along the ground plane from Moreover, when pressurized water is used, the water can enter the ground surface through the notch. In either case, since the position close to the ground contact surface can be used as the starting point of the crack in the earth and sand, it becomes easy to remove the earth and sand, and workability can be improved.

In addition, by providing notches in the first and second protrusions arranged in front and behind in the traveling direction, the tip of a tool or the like inserted through the notch of the first or second protrusion can be It collides with the protrusion located between the first protrusion and the second protrusion. The force applied to the tool, etc. collides with the projections located between the first projection and the second projection, and propagates in the direction intersecting the insertion direction of the tool, etc., so that the earth and sand between the projections can be released more effectively.

In a second invention, in the first invention, the third projection disposed between the first projection and the second projection is further advanced than the first projection and the second projection. Large dimension in the direction.

According to the above configuration, the cross-sectional area of the shoe plate in the width direction, which is decreased by providing the notch, is reduced by making the dimension of the third projection larger in the traveling direction than the first and second projections. It is possible to secure the strength of the shoe plate, and reduce the risk to the strength of the shoe plate.

In a third invention, in the first or second invention, the notch is formed from a first notch provided on the first protrusion and a second notch provided on the second protrusion. Thus, the first notch and the second notch are arranged alternately in a direction intersecting with the traveling direction.

According to the above configuration, it is possible to secure the reduced cross-sectional area of the shoe plate in the width direction due to the provision of the notch, 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 notch is provided by notching from the end in the height direction of the first projection and the second projection until it reaches the ground surface, so that the earth and sand can be easily removed. It becomes possible and workability can be improved. In addition, by providing the notches in the first projection and the second projection arranged in the forward and rearward directions in the traveling direction, it is possible to more effectively separate the earth and sand between the projections.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a hydraulic excavator equipped with a crawler-type undercarriage, showing an embodiment of the present invention; FIG. 2 is a partially enlarged view of FIG. 1; 1 is a perspective view showing a shoe plate according to an embodiment of the invention; FIG. FIG. 4 is a side view showing the shoe plate according to the embodiment of the invention; It is a bottom view which shows the shoe plate which concerns on embodiment of this invention. FIG. 11 is a bottom view showing a shoe plate according to another embodiment of the invention;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the following description of preferred embodiments is essentially merely an example, and is not intended to limit the present invention, its applications, or its uses.

In this specification, the side of the ground contact surface 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", based on the state in which the shoe plate is incorporated in the undercarriage.

Also, in FIG. 3, the advancing direction L of the shoe plate body and the width direction W of the shoe plate body are indicated by arrows. Unless otherwise specified, the directions indicated by these arrows will be followed. It should be noted that the “direction intersecting with the direction of travel” refers to directions other than the direction of travel L, and includes directions orthogonal to the direction of travel L. In this specification, the direction intersecting with the traveling direction L is the width direction W. As shown in FIG.

As shown in FIG. 1 , the work machine 1 is, for example, a hydraulic excavator, and includes a crawler-type lower travel body 2 and an upper revolving body 3 mounted on the lower travel body 2 so as to be swivelable. A cab 4 is provided on a revolving frame 5 of the upper revolving body 3 , and an attachment 6 for excavation work or the like is attached to the front of the revolving frame 5 .

The lower running body 2 has drive wheels 7 and idler wheels 8 at the rear end and the front end, respectively. A crawler 9 is stretched over the driving wheels 7 and the idler wheels 8 .

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

FIG. 3 is a perspective view showing the shoe plate according to the embodiment of the invention from the outer peripheral side. In FIG. 3, an arrow L indicates the traveling direction of the shoe plate body 20, in other words, the traveling direction of the working machine 1. As shown in FIG. An arrow W is a direction intersecting the arrow L and indicates the width direction of the shoe plate body 20 . In the present embodiment, the direction W that intersects the traveling direction L of the shoe plate body 20 is substantially perpendicular to the traveling direction L, but it does not necessarily have to be perpendicular.

The shoe plate 10 protrudes from a shoe plate main body 20 and a ground contact surface 20a of the shoe plate main body 20, extends in a direction W intersecting the advancing direction L of the shoe plate main body 20, and is spaced apart in the advancing direction L. and three 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 plane shape, and when assembled to the lower traveling body 2, the surface facing the outer peripheral side serves as a ground contact surface 20a facing the ground. Three protrusions 30A, 30B, and 30C protrude from the ground contact surface 20a toward the outer peripheral side. Further, the shoe plate body 20 has connecting holes 21 between the protrusions. A bolt is inserted into the connecting hole 21 from the outer peripheral side, and the shoe plates 10 adjacent in the traveling direction L are connected by fixing the connecting member 11 to the inner peripheral side.

Of the three protrusions 30A, 30B, and 30C, the first protrusion 30A and the second protrusion 30B arranged in the forward and rearward directions in the traveling direction L have notches 31a and 31b, respectively. A third protrusion 30C positioned between the first protrusion 30A and the second protrusion 30B does not have a notch.

The notch portions 31a and 31b provided in the first projection portion 30A and the second projection portion 30B penetrate the first projection portion 30A and the second projection portion 30B in the advancing direction L, respectively. In addition, the cutouts 31a and 31b are cut out from the ends (peripheral side ends) in the height direction of the first projection 30A and the second projection 30B until they reach the ground contact surface 20a, and intersect with the traveling direction L. A plurality of them are provided at intervals in the direction (width direction) W. The bottoms (ends on the inner peripheral side) of the cutouts 31a and 31b of the first protrusion 30A and the second protrusion 30B are flush with the ground surface 20a.

FIG. 4 is a side view showing the shoe plate according to the embodiment of the invention. As shown in FIG. 4, the protrusions 30A, 30B, and 30C are spaced apart in the traveling direction L. As shown in FIG. Let La, Lb, and Lc be the dimensions of the protrusions 30A, 30B, and 30C in the traveling direction L, respectively. The dimension Lc in the traveling direction L of the third projection 30C arranged between the first projection 30A and the second projection 30B is larger than the dimensions La and Lb of the first projection 30A and the second projection 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 edge. 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 the shoe plate according to the embodiment of the invention. As shown in FIG. 5, in this embodiment, four cutouts 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. The angle at which the 31a and 31b are provided is not limited, and may be provided obliquely with respect to the traveling direction L, for example. The dimensions of the cutouts 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 deposited between the protrusions.

The first notch 31a provided on the first protrusion 30A and the second notch 31b provided on 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. By providing the positions of the notches 31a and 31b and the position of the connecting hole 21 so as not to overlap in the width direction W, the strength of the shoe plate 10 can be ensured.

In the present embodiment configured as described above, by providing the notches 31a and 31b that are cut from the ends (peripheral side ends) in the height direction of the protrusions 30A and 30C to reach the ground contact surface 20a, The bottoms (ends on the inner peripheral side) of the cutouts 31a and 31b of the first protrusion 30A and the second protrusion 30B are flush with the ground surface 20a. Therefore, when removing the earth and sand deposited between the protrusions, it is possible to insert a bar-shaped tool or the like along the ground contact surface 20a through the cutouts 31a and 31b, so that the earth and sand can be removed efficiently and easily.

By providing the cutouts 31a and 31b in the first projection 30A and the second projection 30C arranged in the forward and rearward directions in the traveling direction L, the tip of a tool or the like inserted through the cutouts 31a and 31b can be It collides with the third protrusion 30C located between the protrusion 30A and the second protrusion 30B. When the tool or the like collides with the third projection 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 projections can be removed more effectively.

Further, in this embodiment, as shown in FIG. 4, the distances Lac and Lbc between the projections are smaller than three times the height H of the projections 30A, 30B and 30C. In the field of shoe plate design engineering, if the distance between the protrusions of the shoe plate is at least three times the height of the protrusions, sediment will not accumulate between the protrusions and traction will always be maintained. Are known. However, even in the configuration of the present embodiment, in which the distance between the projections is smaller than three times the height of the projections, and it is believed that sediment is likely to accumulate, the above effect is exhibited remarkably. be.

The dimension Lc in the traveling direction L of the third projection 30C arranged between the first projection 30A and the second projection 30B is larger than the dimensions La and Lb of the first projection 30A and the second projection 30B. Therefore, the reduced cross-sectional area of the shoe plate 10 in the width direction W due to the provision of the notches 31a and 31b can be ensured, and the risk to the strength of the shoe plate 10 can be reduced.

(Other embodiments)
The present invention may be configured as follows for the above embodiment.

That is, in the above-described embodiment, as shown in FIG. 5, the cutouts 31a and 31b provided in the first protrusion 30A and the second protrusion 30B are provided at the same position in the width direction W, but in FIG. In the other embodiment shown, the first notch 32a provided on the first protrusion and the second notch 32b provided on the second protrusion are overlapped in the direction W intersecting the traveling direction L. are staggered to avoid By displacing the positions of the first notch 32a and the second notch 32b in the width direction W and arranging them in a zigzag manner, the width direction W of the shoe plate 10 lowered by providing the notches 31a and 31b. can be ensured, and the risk to the strength of the shoe plate 10 can be more effectively reduced.

Although the working machine 1 is a hydraulic excavator, it is not particularly limited as long as it has a crawler-type undercarriage 2 .

1 working machine
2 Lower running body
3 upper rotating body
4 Cab
5 swivel frame
6 attachment
7 drive wheels
8 idler wheel
9 crawler
10 shoe plate
11 connecting member
20 shoe plate body
20a ground plane
21 connecting hole
30A first protrusion
30B second protrusion
30C third protrusion
31a, 31b Notch
32a first notch
32b second notch

Claims (3)

a shoe plate body;
three protrusions projecting from the contact surface of the shoe plate body, extending in a direction intersecting with the direction of movement of the shoe plate body, and spaced apart in the direction of movement;
Of the three protrusions, the first protrusion and the second protrusion arranged in front and behind in the direction of travel have notches penetrating the first protrusion and the second protrusion in the direction of travel. having a plurality of spaced apart in a direction intersecting with
The notch is cut from the end in the height direction of the first projection and the second projection until it reaches the ground contact surface ,
The notch portion is composed of a first notch portion provided on the first projection portion and a second notch portion provided on the second projection portion,
The first notch and the second notch are arranged alternately in a direction intersecting the traveling direction.
A shoe plate characterized by A shoe plate according to claim 1,
A shoe plate characterized in that a third projection disposed between the first projection and the second projection has a dimension in the traveling direction larger than that of the first projection and the second projection. . a shoe plate body;
three protrusions projecting from the contact surface of the shoe plate body, extending in a direction intersecting with the direction of movement of the shoe plate body, and spaced apart in the direction of movement;
Of the three protrusions, the first protrusion and the second protrusion arranged in front and behind in the direction of travel have notches penetrating the first protrusion and the second protrusion in the direction of travel. having a plurality of spaced apart in a direction intersecting with
The notch is cut from the end in the height direction of the first projection and the second projection until it reaches the ground contact surface,
A third projection disposed between the first projection and the second projection has a dimension in the traveling direction larger than that of the first projection and the second projection. Shoe plate.

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