JP7316889B2 - Bucket device and work machine equipped with it - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a bucket device and a work machine including the same.

Conventionally, a first bucket, a second bucket attached to the first bucket so as to be openable and closable about a pivot shaft, a first tooth portion arranged in the first bucket, and a second bucket arranged in the second bucket A bucket device having two teeth is known (see Patent Literature 1).

Each of the first tooth portion and the second tooth portion described in Patent Document 1 has a plurality of long teeth and a plurality of short teeth that are alternately laminated in the axial direction of the rotation shaft. It is constructed by inserting a spacer between

JP 2016-125212 A

However, in the bucket device described in Patent Document 1, gaps are formed between the long teeth, and the gaps are likely to be clogged with fragments of crushed dangerous materials, earth and sand, etc., so there is room for improvement in maintainability. .

An object of the present disclosure is to provide a bucket device capable of improving maintainability and a working machine including the same.

A bucket device according to an aspect of the present disclosure includes a first bucket, a second bucket attached to the first bucket so as to be openable and closable about a rotation shaft, a first tooth portion arranged in the first bucket, Disposed within the second bucket and comprising a first tooth and an opposing second tooth. The first tooth portion is configured by a plurality of first teeth arranged in the axial direction of the rotation shaft and in close contact with each other. The second tooth portion is configured by a plurality of second teeth arranged in the axial direction and in close contact with each other.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a bucket device capable of improving maintainability and operability and reducing maintenance costs, and a work machine including the same.

Perspective view of working machine Side view of the bucket device in the closed state viewed from the left Perspective cross-sectional view of the bucket device viewed from below A plan view of the first opening of the first bucket Plan view of the second opening of the second bucket

(Configuration of working machine 1)
A configuration of a working machine 1 according to an embodiment will be described with reference to the drawings. A working machine 1 according to the present embodiment is a hydraulic excavator. In the following description, "up", "down", "front", "rear", "left", and "right" are directions based on the state viewed forward from the driver's seat. “Front-back direction” means the front-back direction of the work machine 1 . “Vehicle width direction” means the lateral direction of the work machine 1 . The "vertical direction" is a direction perpendicular to the front-rear direction and the vehicle width direction. The "vertical direction" does not have to coincide with the vertical direction.

FIG. 1 is a perspective view of a working machine 1. FIG. The working machine 1 includes a traveling body 2 , blades 3 , a swivel base 4 , a counterweight 5 , an engine room 6 , a cab 7 , a shield 8 , an equipment room 9 and a working machine 10 .

The traveling body 2 has a pair of crawler belts 2a and 2b that can rotate independently of each other. The work machine 1 can move forward and backward or rotate left and right by rotating the pair of crawler belts 2a and 2b forward or backward. The blade 3 is attached to the traveling body 2 so as to be vertically swingable. The blade 3 can be used for grading the ground. The swivel base 4 is rotatably supported on the traveling body 2 . The swivel base 4 constitutes the body frame of the work machine 1 . A counterweight 5 , an engine room 6 , a cab 7 and a work implement 10 are arranged on the swivel base 4 .

A counterweight 5 is arranged on the rear end of the swivel base 4 . The engine room 6 is arranged in front of the counterweight 5 . The engine room 6 accommodates an engine, an exhaust gas treatment device, and the like. The cab 7 is arranged in front of the engine room 6 . The cab 7 accommodates a driver's seat, operating tools, and the like. A shield 8 is attached to the front window of the cab 7 . The equipment room 9 is arranged in front of the engine room 6 . The equipment chamber 9 accommodates a hydraulic pump for supplying hydraulic oil and the like.

The work implement 10 is arranged in front of the engine room 6 and on the side of the cab 7 . The work machine 10 has a boom 11, an arm 12, a bucket device 13, and hydraulic piping 14 for attachment.

The boom 11 is swingably supported by the swivel base 4 . The boom 11 is driven by a boom cylinder 11a. The arm 12 is swingably supported by the boom 11 . The arm 12 is driven by an arm cylinder 12a.

The bucket device 13 can be used for crushing hazardous materials, excavating the ground, removing weeds, and crushing rubble and the like. Bucket device 13 is detachably attached to arm 12 . The bucket device 13 is swingably supported by the arm 12 . The bucket device 13 is driven by a bucket cylinder 13a. The attachment hydraulic pipe 14 is connected to a pair of left and right hydraulic cylinders 70, 70, which will be described later.

(Configuration of Bucket Device 13)
The bucket device 13 is used for crushing objects scattered near the ground surface (for example, mines and unexploded bombs of cluster submunitions, etc.), excavating earth and sand, and the like.

FIG. 2 is a left side view of the bucket device 13 in a closed state. FIG. 3 is a perspective view of the bucket device 13 as seen from the lower left. In order to show the internal structure of the bucket device 13, FIG. 3 illustrates a state in which the bucket device 13 is cut at the center in the vehicle width direction.

The bucket device 13 includes a first bucket 20, a second bucket 30, a first tooth portion 40, a second tooth portion 50, a partition plate 60, and a pair of left and right hydraulic cylinders 70,70.

The first bucket 20 is formed in a box shape that opens downward and forward (that is, on the second bucket 30 side). A pair of left and right couplers 21 , 21 are attached to the rear surface of the first bucket 20 . The first bucket 20 is attached to the arm 12 (see FIG. 1) of the work machine 1 via a pair of left and right couplers 21,21.

The second bucket 30 is arranged in front of the first bucket 20 . The second bucket 30 is formed in a box-like shape that opens downward and rearward (that is, on the first bucket 20 side). A digging tooth 31 is attached to the front end of the second bucket 30 . The excavation tooth 31 functions as a cutting edge during excavation.

The second bucket 30 is attached to the first bucket 20 so as to be openable and closable about a pivot shaft 32 . The rotating shaft 32 is inserted through a pair of left and right links 33 , 33 attached to the upper surface of the second bucket 30 and the upper end of the first bucket 20 . The rotating shaft 32 has an axis AX. The rotating shaft 32 extends along the axis AX. In the following description, the direction parallel to the axis AX will be referred to as the "axial direction". In this embodiment, the axial direction is parallel to the vehicle width direction.

As shown in FIG. 3 , the object to be crushed can be crushed by closing the second bucket 30 with the object to be crushed sandwiched between the first teeth 40 and the second teeth 50 .

The first tooth 40 is arranged within the first bucket 20 . The first tooth portion 40 is used together with the second tooth portion 50 for crushing an object to be crushed. As shown in FIG. 3, the first tooth portion 40 is fixed by three shafts 540a arranged along the axial direction. However, the method of fixing the first tooth portion 40 is not particularly limited. As shown in FIG. 3 , the total length of the first tooth portion 40 is longer than the total length of the second tooth portion 50 in the vertical direction, but may be equal to or less than the total length of the second tooth portion 50 .

The first tooth portion 40 is composed of a plurality of first teeth 41 . Each first tooth 41 can be made of, for example, an alloy containing iron as a main component. Each first tooth 41 is formed in a plate shape extending in the vertical direction. The number of first teeth 41 is not particularly limited as long as it is two or more. Therefore, the width of the first tooth portion 40 can be optimized, and as a result, the weight can be reduced, so that the operability of the bucket device 13 is improved. In addition, since only one type of replacement part for the first tooth 41 is required, maintenance costs can be reduced.

The plurality of first teeth 41 are arranged in the axial direction of the rotating shaft 32 and are in close contact with each other. Specifically, the adjacent first teeth 41 are arranged such that their main surfaces are in close contact with each other. Therefore, since it is possible to suppress the formation of gaps between the first teeth 41, it is possible to suppress the first tooth portion 40 from being clogged with pieces of crushed dangerous materials, earth and sand, etc. Even if it is clogged, it can be easily removed. Therefore, the maintainability of the first tooth portion 40 can be improved. Moreover, when a part of the first tooth portion 40 is damaged, only the damaged first tooth 41 needs to be replaced, so maintenance costs can be reduced.

The first tooth portion 40 has a first facing surface 40S facing the second tooth portion 50, and the outer surface of each first tooth 41 is flush with the first facing surface 40S. Therefore, it is possible to suppress the formation of steps between the first teeth 41 on the first opposing surface 40S. Even if it is clogged with sand, it can be easily removed.

The second tooth 50 is arranged within the second bucket 30 . The second tooth portion 50 is used together with the first tooth portion 40 to crush the object to be crushed. As shown in FIG. 3, the second tooth portion 50 is fixed by three shafts 50a arranged along the axial direction. However, the fixing method of the second tooth portion 50 is not particularly limited. As shown in FIG. 3 , the total length of the second tooth portion 50 in the vertical direction is shorter than the total length of the second tooth portion 50 , but may be equal to or greater than the total length of the first tooth portion 40 .

The second tooth portion 50 is composed of a plurality of second teeth 51 . Each second tooth 51 can be made of, for example, an alloy containing iron as a main component. Each second tooth 51 is formed in a plate shape extending in the vertical direction. The number of second teeth 42 is not particularly limited as long as it is two or more. Therefore, the width of the second tooth portion 50 can be optimized, and as a result, the weight can be reduced, so that the operability of the bucket device 1 is improved. Moreover, since only one type of replacement part for the second tooth 51 is required, maintenance costs can be reduced.

The plurality of second teeth 51 are arranged in the axial direction of the rotating shaft 32 and are in close contact with each other. Specifically, the adjacent second teeth 51 are arranged such that their main surfaces are in close contact with each other. Therefore, since it is possible to suppress the formation of gaps between the second teeth 51, it is possible to suppress clogging of fragments of crushed dangerous materials, earth and sand, etc. in the second tooth portion 50. Even if it is clogged, it can be easily removed. Therefore, the maintainability of the second tooth portion 50 can be improved. Moreover, when a part of the second tooth portion 50 is damaged, only the damaged second tooth 51 needs to be replaced, so maintenance costs can be reduced.

The second tooth portion 50 has a second facing surface 50S facing the first tooth portion 40, and the outer surface of each second tooth 51 is flush with the second facing surface 50S. Therefore, it is possible to suppress formation of steps between the second teeth 51 on the second facing surface 50S. Even if it is clogged with sand, it can be easily removed.

The partition plate 60 is arranged inside the second bucket 30 . As shown in FIG. 3 , the partition plate 60 is arranged on the opposite side of the first bucket 20 with the second tooth portion 50 interposed therebetween. The partition plate 60 partitions the internal space of the second bucket 30 into a space for storing excavated earth and sand and a space where the second tooth portion 50 is arranged. As a result, it is possible to prevent excavated earth and sand from adhering to the first toothed portion 40 and the second toothed portion 50 . Moreover, when the object to be crushed bursts, it is possible to suppress scattering of scattered fragments.

The pair of left and right hydraulic cylinders 70 , 70 are connected to the pair of left and right couplers 21 , 21 and the pair of left and right links 33 , 33 . The left and right hydraulic cylinders 70 , 70 expand and contract, respectively, so that the second bucket 30 swings about the rotation shaft 32 . Thereby, the second bucket 30 opens and closes with respect to the first bucket 20 .

(Overall Width and Weight of First Tooth Part 40 and Second Tooth Part 50)
4 is a plan view of the first opening 20S on the second bucket 30 side of the first bucket 20. FIG.

In the axial direction, the overall width 40W of the first tooth portion 40 is smaller than the overall width 20W of the first opening 20S of the first bucket 20 . The total width 40W of the first tooth portion 40 can be 10% or more and 70% or less of the total width 20W of the first opening 20S.

The total width 40W of the first tooth portion 40 is preferably 30% or less of the total width 20W of the first opening 20S. As a result, the weight of the entire first tooth portion 40 can be reduced to 10% or less of the weight of the first bucket 20 while the first tooth portion 40 is composed of the plurality of first teeth 41 . Therefore, the total weight of the bucket device 13 is reduced, and civil engineering work can be performed without replacing the bucket device 13, so that the convenience of the bucket device 13 is greatly improved. For example, when the total weight of the bucket device 13 is 1000 kg, the combined weight of the first tooth portion 40 and the second tooth portion 50 can be 100 kg or less.

The total width 40W of the first tooth portion 40 is preferably 15% or more of the total width 20W of the first opening 20S. Thereby, even if it is difficult for the operator to visually recognize the object to be crushed, the object to be crushed can be easily picked up by the first tooth portion 40 .

5 is a plan view of the second opening 30S of the second bucket 30 on the side of the first bucket 20. FIG.

In the axial direction, the overall width 50W of the second tooth portion 50 is smaller than the overall width 30W of the second opening 30S of the second bucket 30 . The total width 50W of the second tooth portion 50 can be 10% or more and 70% or less of the total width 30W of the second opening 30S.

The overall width 50W of the second tooth portion 50 is preferably 30% or less of the overall width 30W of the second opening 30S. As a result, the weight of the entire second tooth portion 50 can be reduced to 10% or less of the weight of the second bucket 30 while the second tooth portion 50 is composed of the plurality of second teeth 51 . Therefore, the total weight of the bucket device 13 is reduced, and civil engineering work can be performed without replacing the bucket device 13, so that the convenience of the bucket device 13 is greatly improved. For example, when the total weight of the bucket device 13 is 1000 kg, the combined weight of the first tooth portion 40 and the second tooth portion 50 can be 100 kg or less.

The total width 50W of the second tooth portion 50 is preferably 15% or more of the total width 30W of the second opening 30S. As a result, even if it is difficult for the operator to visually recognize the object to be crushed, the object to be crushed can be easily picked up by the second tooth portion 50 .

The overall width 50W of the second tooth portion 50 is preferably equal to the overall width 40W of the first tooth portion 40, but may be different from the overall width 40W of the first tooth portion 40.

1 Working Machine 13 Bucket Device 20 First Bucket 20S First Opening 30 Second Bucket 30S Second Opening 32 Rotating Shaft 40 First Teeth 40S First Opposing Surface 41 First Teeth 50 Second Teeth 50S Second Opposing Surface 51 second tooth 60 partition plate 70 hydraulic cylinder

Claims (8)

a first bucket;
a second bucket attached to the first bucket so as to be openable and closable about a pivot shaft;
a first tooth disposed within the first bucket;
a second tooth disposed within the second bucket and facing the first tooth;
with
The first tooth portion is arranged in the axial direction of the rotation shaft and is composed of a plurality of first teeth whose main surfaces are in close contact with each other,
The second tooth portion is configured by a plurality of second teeth arranged in the axial direction and having main surfaces in close contact with each other,
Bucket device. The first tooth portion has a first facing surface facing the second tooth portion,
an outer surface of each of the plurality of first teeth is flush with the first opposing surface;
The bucket device according to claim 1. The second tooth portion has a second facing surface facing the first tooth portion,
an outer surface of each of the plurality of second teeth is flush with the second opposing surface;
The bucket device according to claim 1 or 2. The first bucket has a first opening that opens toward the second bucket,
In the axial direction, the total width of the first tooth portion is 30% or less of the total width of the first opening,
The bucket device according to any one of claims 1 to 3. The weight of the first tooth is 10% or less of the weight of the first bucket,
The bucket device according to claim 4. The second bucket has a second opening that opens toward the first bucket,
In the axial direction, the overall width of the second tooth portion is 30% or less of the overall width of the second opening,
The bucket device according to any one of claims 1 to 4. The weight of the second tooth is 10% or less of the weight of the second bucket,
The bucket device according to claim 6. body frame and
a working machine attached to the vehicle body frame;
with
The work machine includes the bucket device according to any one of claims 1 to 7,
working machine.

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