KR102017345B1 - Arm for excavator having inner reinforcement plate - Google Patents

Arm for excavator having inner reinforcement plate Download PDF

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Publication number
KR102017345B1
KR102017345B1 KR1020120152092A KR20120152092A KR102017345B1 KR 102017345 B1 KR102017345 B1 KR 102017345B1 KR 1020120152092 A KR1020120152092 A KR 1020120152092A KR 20120152092 A KR20120152092 A KR 20120152092A KR 102017345 B1 KR102017345 B1 KR 102017345B1
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KR
South Korea
Prior art keywords
arm
plate
excavator
reinforcing plate
internal
Prior art date
Application number
KR1020120152092A
Other languages
Korean (ko)
Other versions
KR20140083131A (en
Inventor
윤희상
윤희문
Original Assignee
두산인프라코어 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 두산인프라코어 주식회사 filed Critical 두산인프라코어 주식회사
Priority to KR1020120152092A priority Critical patent/KR102017345B1/en
Publication of KR20140083131A publication Critical patent/KR20140083131A/en
Application granted granted Critical
Publication of KR102017345B1 publication Critical patent/KR102017345B1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/40—Special vehicles
    • B60Y2200/41—Construction vehicles, e.g. graders, excavators
    • B60Y2200/412—Excavators

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Shovels (AREA)

Abstract

The present invention relates to an excavator arm having an internal reinforcing plate constituting the front working device of the excavator, and in particular to the internal reinforcing plate that can increase the strength while minimizing the weight increase of the arm by providing an internal reinforcing plate inside the arm of the excavator Having an excavator arm.

Description

Arm for excavator having inner reinforcement plate

The present invention relates to an excavator arm having an internal reinforcing plate constituting the front working device of the excavator, and more particularly, by having an internal reinforcing plate inside the arm of the excavator, thereby minimizing the weight increase of the arm while increasing the strength. An excavator arm having a reinforcement plate.

Excavator is a construction machine that performs various tasks in civil engineering, construction, and construction site, a traveling body that plays a role of equipment movement, an upper work body mounted on the traveling body and rotating 360 degrees, and a front work device consisting of boom, arm and bucket. It consists of.

On the other hand, the arm is usually composed of a hollow structure surrounded by a top plate, a bottom plate and a side plate, while the load due to the vertical and horizontal stress and moment during field work such as excavation or lifting.

Therefore, problems such as deformation of the arm or cracking of the iron plate occur. In particular, a super long reach arm having a length of 4 [m] or more is more vulnerable to this problem because of its long shape.

Therefore, it is conceivable to solve the above problems by increasing the thickness of the steel plate, but when the steel plate constituting the arm becomes thick, it is difficult to see sufficient effects such as lowering the performance and fuel efficiency of the excavator due to the weight increase and increasing the manufacturing cost. there is a problem.

The present invention has been proposed to solve the above problems, an internal reinforcing plate that can increase the strength while minimizing the weight increase of the arm by having an internal reinforcing plate therein instead of thickening the steel plate thickness of the excavator To provide an excavator arm having a.

To this end, the excavator arm having an internal reinforcing plate according to the present invention, in the arm constituting the front working device of the excavator, starting from the 50% point of the total length of the arm starting from the portion where the boom is connected And an internal reinforcing plate installed within a first condition range corresponding to a 70% point.

At this time, the inner reinforcing plate is satisfied within the first condition range, starting from the point where the upper end of the straight line section of the arm is preferably installed in the second condition range corresponding to 1000 [mm].

The inner reinforcing plate may satisfy the first condition range and the second condition range, respectively, and may be installed within a third condition range corresponding to 800 [mm] to 1000 [mm] starting from the side plate welding portion of the arm. It is desirable to have.

The inner reinforcing plate may be any one of a rectangular plate, a semicircular plate having a semicircular groove formed on one side of the rectangular plate, and a curvature plate having a groove having a curvature other than the semicircular shape on either side of the square plate.

In addition, the arm is preferably a super long reach arm having a total length of 4 [m] or more.

The present invention as described above is provided with an internal reinforcing plate therein instead of thickening the thickness of the iron plate of the excavator.

Therefore, minimizing the increase in weight of the arm makes it possible to increase strength while preventing excavator performance and fuel economy from falling.

In addition, the present invention can maximize the effect as described above by optimizing the installation position of the internal reinforcement plate and the shape of the internal reinforcement plate.

1 is a perspective view of an excavator arm having an internal reinforcing plate according to the present invention.
Figure 2 is a front view showing an excavator arm with an internal reinforcement plate according to the present invention.
3 is a first embodiment showing an internal reinforcing plate of an excavator arm with an internal reinforcing plate according to the present invention.
4 is a second embodiment showing an internal reinforcement plate of an excavator arm having an internal reinforcement plate according to the present invention.
5 is a third embodiment showing an internal reinforcement plate of an excavator arm having an internal reinforcement plate according to the present invention.

Hereinafter, an excavator arm having an internal reinforcement plate according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

First, as shown in FIG. 1, an excavator arm 10 having an internal reinforcement plate according to the present invention is equipped with a front work device of an excavator together with a boom installed at its front end and a bucket installed at its rear end. Configure. The boom, arm and bucket are each actuated by hydraulic cylinders.

Excavator arm (hereinafter referred to as 'arm') 10 having an internal reinforcement plate according to the present invention consists of an arm box surrounded by an upper plate, a lower plate and both side plates, and an internal reinforcement plate 20 in an empty space therein. ) Is installed. The inner reinforcing plate 20 is welded in a vertical position.

Therefore, the intensity | strength of the arm 10 is raised, without making the thickness of the iron plate which comprises an upper plate, a lower plate, a side plate, etc. thick. Furthermore, since the strength is increased by the internal reinforcing plate 20, the weight of the arm 10 is minimized, and the performance of the excavator or the fuel economy is reduced.

In particular, in the case of the non-bending super long reach arm 10 whose total length of the arm 10 is 4 [m] or more, the effect of having the internal reinforcing plate 20 of the present invention is provided because of its long shape. Is even more doubled.

Meanwhile, as shown in FIG. 2, the internal reinforcement plate 20 may be formed of a material corresponding to a point of 50% to 70% of the total length A of the arm 10 starting from a portion where the boom is connected. It is installed within 1 condition range.

The overall length A of the arm 10 is generally the length between the boom connection shaft hole X1 provided at the front end of the arm 10 and the bucket connection shaft hole X2 installed at the rear end of the arm 10. Is determined.

The reason why the internal reinforcing plate 20 is installed at 50% to 70% of the total length A of the arm 10 as described above is that the central portion of the entire length A of the arm 10 is the arm 10. It is particularly susceptible to deformation of steel plates and breakage of steel plates, so it contains a 50% point.

At the same time, according to the design shape of the arm 10 itself, the width becomes narrower toward the end thereof, so that it is limited to within 70% in consideration of both being vulnerable to the workload and being far from the center.

In addition, the internal reinforcing plate 20 of the present invention is from the point (or, the inclination section start point) where the upper plate straight section (H) of the arm 10 ends with the first condition as described above or separately from the first condition. It is installed within the second condition range corresponding to (U) 1000 [mm].

Looking at the top plate shape of the arm 10 there is a straight section (H) and a slope section going from the front end to which the boom is connected to the rear end to which the bucket is connected. Therefore, the installation position of the internal reinforcing plate 20 is limited to within 1000 [mm] length of the inclined section.

In the inclined section, the width of the arm 10 keeps narrowing, so it is vulnerable to the workload. On the other hand, as described above, since it moves away from the center of the entire length A of the arm 10, it is limited to within 1000 [mm] from the point where the upper plate straight section (H) ends.

In addition, the internal reinforcing plate 20 of the present invention starts with the side plate welded portion W of the arm 10 in combination with the first and second conditions or separately from the first and second conditions, from 800 [mm] to It is installed in the third condition range corresponding to 1000 [mm].

The side plate is usually manufactured by welding the two iron plate ends in contact with each other, wherein the inner reinforcing plate 20 at 800 [mm] to 1000 [mm] starting from the side plate welding portion W of the arm 10. Install it.

If it is too close to the side plate welded portion W, it is too biased to one side of the arm 10 to which the boom is connected, so that the other side of the narrow arm 10 cannot be sufficiently reinforced, while too far from the side plate welded portion W. Since it is not possible to reinforce relatively weak welded parts, it is limited to the above range.

Hereinafter, the internal reinforcing plate of the present invention as described above will be described.

3 shows an internal reinforcing plate 20 according to a first embodiment of the present invention, FIG. 4 shows an internal reinforcing plate 20 according to a second embodiment of the present invention, and FIG. An internal reinforcing plate 20 according to the third embodiment is shown.

The inner reinforcement plate 20 of FIG. 3 is a square plate 21, and the inner reinforcement plate 20 of FIG. 4 is a semicircular plate 22 having a semicircular groove 22a recessed at one side of the square plate, and FIG. 5. The internal reinforcing plate 20 is a curvature plate 23 formed with a groove 23a having a curvature other than the semicircular shape on either side of the square plate.

Even if the general rectangular plate 21 is used as shown in FIG. 3, since the strength of the arm 10 can be reinforced, an object of the present invention is achieved.

4 and 5, the inner reinforcing plate 20 according to the embodiment of the present invention may be in the form of a semi-circular plate 22 and / or a curvature plate 23. The semicircular plate 22 and / or the curvature plate 23 may be provided with a semicircular groove 22a and / or a groove 23a having a curvature.

The semi-circular groove 22a and / or the curvature groove 23a prevent the corresponding portion of the inner reinforcement plate 20 from contacting the inner surface of the arm 10.

Therefore, the corresponding part avoids concentration of stress due to the load of the arm 10 and prevents breakage of the internal reinforcing plate 20 welded inside the arm 10.

Furthermore, the shape of the portion not in contact with the arm 10 may be configured in the shape of a semicircle and / or a free curve having various curvatures to achieve an optimal condition for dispersing the stress.

However, in FIG. 4 and FIG. 5, since the respective shapes are defined using the same reference numerals "A" and "B" as those used in FIG. 2 ("C" is curvature), the reference numerals may appear to overlap. .

However, the reason why the same reference numerals are used is that the semicircular groove 22a of the rectangular plate 21 or the groove 23a having the curvature has the internal reinforcing plate (from the full length A or the welded portion W) of the arm 10. It means that it is properly adjusted by the length (B) up to 20).

4 and 5, the semicircular grooves 22a and the curvature grooves 23a are each formed at the lower portion of the square plate, but as long as it is possible to disperse the stress concentration, other portions including the top of the square plate and the like can be obtained. It may also be formed in the part.

In the above, the specific Example of this invention was described above. However, the spirit and scope of the present invention is not limited to these specific embodiments, and various changes and modifications can be made without departing from the spirit of the present invention. Those who have it will understand.

Therefore, since the embodiments described above are provided to completely inform the scope of the invention to those skilled in the art, it should be understood that they are exemplary in all respects and not limited. The invention is only defined by the scope of the claims.

10: excavator arm
20: internal gusset
21: internal reinforcing plate (square plate type)
22: internal reinforcement plate (semi-circular groove type)
23: Internal reinforcement plate (curvature groove type)
X1: boom coupling shaft
X2: bucket connection shaft
A: Arm full length
B: Length between welded part and internal gusset
C: curvature
W: weld
H: straight line section

Claims (5)

In the arm (10) constituting the front working device of the excavator,
Starting from the portion where the boom is connected, the arm 10 includes an internal reinforcement plate 20 installed within a first condition range corresponding to a point of 50% to 70% of the total length (A),
The internal reinforcing plate 20,
A semicircular plate 22 in which a semicircular groove 22a is dug in one side of the square plate, or a curvature plate 23 in which a groove 23a having a curvature other than the semicircular shape is formed on one side of the square plate,
The arm 10 is composed of an arm box surrounded by a lower plate and both side plates, the inner reinforcement plate 20 is installed in an empty space therein,
The semi-circular groove 22a or the groove 23a having the curvature does not contact the inner surface of the arm 10,
The arm 10,
An excavator arm with an internal reinforcing plate, characterized in that the total length A is at least 4 [m] not bent. The method of claim 1,
The internal reinforcing plate 20,
The first condition range is satisfied, starting from the point at which the upper plate straight section (H) of the arm 10 ends, it is installed in the second condition range corresponding to (U) 1000 [mm] Excavator arm with reinforcement plate. The method of claim 2,
The internal reinforcing plate 20,
Within the third condition range that satisfies the first condition range and the second condition range, respectively, and corresponds to 800 [mm] to 1000 [mm] starting from the side plate weld portion W of the arm 10. An excavator arm having an internal reinforcement plate, which is provided. delete delete
KR1020120152092A 2012-12-24 2012-12-24 Arm for excavator having inner reinforcement plate KR102017345B1 (en)

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Application Number Priority Date Filing Date Title
KR1020120152092A KR102017345B1 (en) 2012-12-24 2012-12-24 Arm for excavator having inner reinforcement plate

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Application Number Priority Date Filing Date Title
KR1020120152092A KR102017345B1 (en) 2012-12-24 2012-12-24 Arm for excavator having inner reinforcement plate

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KR20140083131A KR20140083131A (en) 2014-07-04
KR102017345B1 true KR102017345B1 (en) 2019-09-02

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108425388A (en) * 2018-05-31 2018-08-21 马鞍山松鹤信息科技有限公司 A kind of excavator swing arm

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242227A (en) * 2001-02-15 2002-08-28 Shin Caterpillar Mitsubishi Ltd Work arm structure for work machine
JP2002348903A (en) 2001-05-25 2002-12-04 Kubota Corp Boom structure of back hoe
JP2003193512A (en) 2001-12-28 2003-07-09 Komatsu Ltd Work machine and work machine boom of construction machine and manufacturing method therefor

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5810773Y2 (en) * 1977-10-29 1983-02-28 株式会社加藤製作所 power shovel
JP2989120B2 (en) * 1995-06-07 1999-12-13 株式会社クボタ Backhoe boom structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002242227A (en) * 2001-02-15 2002-08-28 Shin Caterpillar Mitsubishi Ltd Work arm structure for work machine
JP2002348903A (en) 2001-05-25 2002-12-04 Kubota Corp Boom structure of back hoe
JP2003193512A (en) 2001-12-28 2003-07-09 Komatsu Ltd Work machine and work machine boom of construction machine and manufacturing method therefor

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