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WO2008053779A1 - Flèche et fixation avant de machine - Google Patents

Flèche et fixation avant de machine Download PDF

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Publication number
WO2008053779A1
WO2008053779A1 PCT/JP2007/070827 JP2007070827W WO2008053779A1 WO 2008053779 A1 WO2008053779 A1 WO 2008053779A1 JP 2007070827 W JP2007070827 W JP 2007070827W WO 2008053779 A1 WO2008053779 A1 WO 2008053779A1
Authority
WO
WIPO (PCT)
Prior art keywords
boom
cylinder
work machine
boom cylinder
work
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2007/070827
Other languages
English (en)
Japanese (ja)
Inventor
Setsuo Yamamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AMAGASAKIJUKI Co Ltd
Original Assignee
AMAGASAKIJUKI Co Ltd
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.)
Filing date
Publication date
Application filed by AMAGASAKIJUKI Co Ltd filed Critical AMAGASAKIJUKI Co Ltd
Publication of WO2008053779A1 publication Critical patent/WO2008053779A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/301—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom with more than two arms (boom included), e.g. two-part boom with additional dipper-arm
    • 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

Definitions

  • the present invention relates to a boom provided in a working machine such as a hydraulic excavator or a building demolition machine, and a front attachment using the boom.
  • a boom of a hydraulic excavator is composed of a single member provided with a folding angle in the shape of a " ⁇ ", but the first boom supported by the hydraulic excavator body, There is also a split boom that has a second boom pivotably connected to the tip of the first boom about a horizontal axis, and the folding angle of both booms can be freely changed by a hydraulic cylinder. It has been.
  • FIG. 15 shows a configuration of a front attachment having the split boom.
  • an arm 52 is connected to the tip of a split boom 51, and a bucket 53 is provided at the tip of the arm 52.
  • 51a is a boom cylinder
  • 52a is an arm cylinder
  • 53a is a bucket cylinder.
  • the split boom 51 includes a first boom 51b whose proximal end is supported by a hydraulic excavator body (upper swing body), and a second boom 51c connected to the distal end side of the first boom 51b. Both the booms 51b and 51c are connected via a connecting pin 51d.
  • a second boom cylinder 51e is installed at the center of each lower surface of the first boom 51b and the second boom 51c. By extending and retracting the piston rod 51f of the second boom cylinder 51e, both booms 51b And 51c bend angle ⁇ can be changed.
  • the arm 52 can be pulled closer to the foot side, so that the working range can be expanded compared to a boom constituted by a single member. There is an advantage that can be.
  • the first boom 51b is held by the two boom cylinders 51a, the first boom 51b is changed.
  • the second boom 51c may float in the direction of arrow X with the connecting pin 51d as a fulcrum due to insufficient thrust of the second boom cylinder 51e. If the piston rod 51f of the second boom cylinder 51e extends in this way, the digging force is inevitably reduced.
  • the front attachment 50 In order to compensate for the above-described decrease in excavation force, it is possible to consider a method of enlarging the second boom cylinder 51e to prevent the piston rod 51f from extending. In that case, the front attachment 50 also has its enlarged second boom. It must be reinforced to a structure suitable for the cylinder 51e, which increases the weight. In addition, if the weight of the front attachment 50 increases, the counterweight for balancing the weight must also be increased.
  • the present invention has been made in consideration of the problems in the conventional split-type boom as described above, and a boom and a front attachment for a working machine that can increase work capacity without increasing the size of the split-type boom. Is to provide.
  • a first boom having a base end supported by a work machine main body and a second boom to which an arm or a work device is connected at a distal end are swingable about a horizontal axis.
  • a rod connecting portion for connecting the piston rod of the second boom cylinder is formed at the first boom connecting side end portion of the second boom, and the second boom cylinder connected to the rod connecting portion is formed.
  • This is a boom for a working machine having a rear end pivotally supported by the first boom.
  • the undulation force can be applied to the second boom from the rear side of the horizontal axis that is the swing center of the second boom, so that the first boom and the second boom Compared with the conventional configuration in which the second boom cylinder is installed approximately in the middle, the force S that effectively uses the capacity of the second boom cylinder is reduced.
  • a boss is formed on the upper side of the first boom connection side end to allow the connection pin as the horizontal shaft to pass therethrough, and is formed below the first boom connection side end. It is preferable that a bracket as the rod connecting portion is extended from the side toward the work machine main body.
  • connection point between the first boom and the second boom is A, and the rear end of the second boom cylinder in the first boom
  • the connecting point C is less than the connecting point A in the contracted state of the second boom cylinder. It is preferable to arrange each connection point so that it is located on the work machine body side.
  • connection points are arranged so that an angle formed by the connection point A, the connection point C, and the connection point B forms approximately 90 ° during or during extension of the second boom cylinder. Good.
  • the boom of the present invention is bent into the first boom and the second boom force S, and the second boom cylinder is extended to the maximum. If it does, the said 2nd boom of the shape of a dogleg will be constituted so that it may warp in the direction opposite to a bending direction.
  • a pair of boom cylinders for raising and lowering the first boom is provided on both side surfaces of the first boom.
  • the second boom cylinder is connected to the first boom.
  • a storage chamber for storing the cylinder can be formed.
  • the boom cylinder for raising and lowering the first boom is provided on the front surface of the first boom
  • a pair of the second booms are provided on both side surfaces of the first boom.
  • a cylinder can be provided. According to this configuration, the boom of the present invention can be applied to a small work machine.
  • the present invention provides a boom having the above-described configuration and a gear connected to the tip of the second boom. And a work machine front attachment comprising a work device coupled to the tip of the arm.
  • the present invention is a front attachment for a working machine including a boom having the above-described configuration and a work device coupled to a distal end portion of the second boom.
  • the force S can be increased to increase the working ability such as arm pulling without increasing the size of the split boom.
  • FIG. 1 is a working range diagram of a hydraulic excavator having a front attachment constituted by a boom according to the present invention.
  • FIG. 2 is an enlarged cross-sectional view of a main part of the boom shown in FIG.
  • FIG. 3 is a plan view of the boom shown in FIG.
  • FIG. 4 is a cross-sectional view taken from the direction of arrows WW shown in FIG.
  • FIG. 5 is an explanatory diagram of a front attachment operation as a comparative example.
  • FIG. 6 is an explanatory diagram of a front attachment operation as a comparative example.
  • FIG. 7 is an explanatory diagram of a front attachment operation according to the present invention.
  • FIG. 8 is an explanatory diagram of a front attachment operation according to the present invention.
  • FIG. 9 (a) is an explanatory view showing the swing range of the boom according to the present invention
  • FIG. 9 (b) is a conventional boom shown for comparison.
  • FIG. 10 (a) is an explanatory view showing the forward turning radius of a construction machine equipped with the boom of the present invention
  • FIG. 10 (b) is an explanatory view showing the forward turning radius of a conventional construction machine. .
  • FIG. 11 is an explanatory view showing a pin arrangement of a boom according to the present invention.
  • FIG. 12 is an explanatory diagram showing a configuration when the boom of the present invention is applied to a small hydraulic excavator.
  • FIG. 13 is an enlarged view of the boom shown in FIG.
  • FIG. 14 is an explanatory diagram showing a configuration when a crusher and a breaker are attached to the boom of the present invention.
  • FIG. 15 is a side view showing a configuration of a conventional split boom.
  • Fig. 1 shows a hydraulic excavator as a work machine and its work range.
  • the position of the front attachment at the work site, P is the front attachment at the excavation work
  • the other postures indicate the work postures between the aerial work and the excavation work.
  • reference numeral 1 denotes a hydraulic excavator, and an upper swing body 4 is pivotably mounted on a lower traveling body 3 fitted with crawlers 2 on the left and right sides.
  • a working front attachment 5 is attached!
  • the front attachment 5 includes a boom 6, an arm 7 connected to the tip of the boom 6, and a bucket (working device) 8 connected to the tip of the arm 7.
  • 6 is configured to undulate by expanding and contracting the boom cylinder 9
  • the arm 7 is configured to swing around the horizontal axis (in the direction of arrow U) by expanding and contracting the arm cylinder 10. It is also configured to swing around the horizontal axis (in the direction of arrow V) by extending and retracting the bucket cylinder 11! /.
  • the boom 6 further includes a first boom 6a supported on the front portion of the upper swing body (work machine main body) 4, and a second boom 6b connected to the tip of the first boom 6a. Both booms 6a and 6b are connected to be swingable about a horizontal axis via a second boom foot pin 6c.
  • the second boom 6b is configured to be raised and lowered by extending and contracting the second boom cylinder 12.
  • reference numeral 13 denotes a counterweight attached to the rear part of the upper swing body 4.
  • FIG. 2 is an enlarged side cross-sectional view showing the main part of the boom 6, and FIG. 3 is a plan view of the boom 6.
  • the first boom 6a is made of a box-shaped member formed in an arc shape that protrudes upward, and is connected to the base end portion via an upper swing body 4 and a boom foot pin (not shown).
  • a boss 6d is formed, and a pair of support portions 6e, 6e for connecting the second boom 6b via the second boom foot pin 6c is formed at the tip.
  • bosses 6f, 6f are formed near the tip of the first boom 6a, and the bosses 6f, 6f are passed through the shaft.
  • the opposite ends of the pin 6g are connected to the rods of the boom cylinders 9 and 9.
  • a partition plate 6h is formed in an L shape inside the first boom 6a so as to bypass the lower side of the boss 6f, and the second boom cylinder 12 is accommodated below the partition plate 6h.
  • a storage chamber S is provided for this purpose.
  • the portion of the partition plate 6h that is close to the boss 6f is formed in the rounded portion 6h ′, and the rear side of the rounded portion 6h ′ is formed in a straight line along the second boom cylinder 12.
  • the rear end portion 12a of the second boom cylinder 12 is supported via a connecting pin 14 with respect to the side wall 6i of the first boom 6a (showing a cross section taken along the line WW in FIG. 2).
  • the rod tip 12c of the piston head 12b is connected to a bracket (described later) 61 of the second boom 6b.
  • a collar portion 61 ' is formed corresponding to the rounded portion 6h' of the partition plate 6h.
  • the bracket 61 stops in a state where the rounded portion 61 'of the bracket 61 is close to the rounded portion 6h' of the partition plate 6h.
  • the second boom cylinder 12 is stored in the storage chamber S of the first boom 6a.
  • the rod tip 12c of the second boom cylinder 12 is positioned rearward of the second boom foot pin 6c, that is, on the hydraulic excavator body side.
  • the second boom 6b rotates upward about 6c, and the bracket 61 is indicated by a two-dot chain line in the figure. Displace to the position.
  • first boom 6a and the second boom 6b are substantially in a straight line, and are in a posture suitable for distal work.
  • the first boom 51b is held by two boom cylinders (not shown), so that the second boom cylinder 51e has a weaker holding force than those boom cylinders that cannot be displaced.
  • the second boom 51c held by the lever will be lifted. As a result, a phenomenon occurs in which the second boom cylinder 51e extends.
  • the force F1 for pulling the second boom cylinder 51e is constituted by a line segment K M passing through the point K and the point M, and a cylinder thrust P Q pushing it.
  • a line segment K M passing through the point K and the point M
  • a cylinder thrust P Q pushing it.
  • the force that makes the Z OMP angle 69 ° means that only 36% of the capacity is used for the thrust 100 of the second boom cylinder 51e.
  • the second boom cylinder 51e in the conventional split boom is less than half.
  • the force F2 for pulling the second boom cylinder 12 is constituted by a line segment A-C passing through the points A and C and a cylinder thrust F-G pushing the same.
  • the thrust is reduced by the angle ZFCH formed by the line segment FG with respect to the line segment HJ.
  • the angle of ZFCH is as small as 38 °, and cos38 ° can be used up to 79% of the thrust of 100 of the second boom cylinder 12 with a force of 0.888. .
  • the second boom cylinder 12 can be extended. Starting with a cylinder holding force of about 80%, the cylinder holding force can be increased to approximately 100%, so that it is possible to reliably prevent the second boom from being lifted due to insufficient thrust of the second boom cylinder.
  • the second boom cylinder 1 is used during excavation work.
  • Fig. 9 (a) shows the swing range of the second boom 6b.
  • the posture shown by the solid line corresponds to Fig. 8, and the posture shown by the two-dot chain line corresponds to Fig. 7. Yes.
  • Fig. 9 (b) shows a conventional boom 60 having a single configuration bent into a square shape.
  • Boom 60 is shown as a broken line.
  • the second boom 6b of the present invention is further warped in the T direction (opposite to the folding direction) from 42 to 43 ° from the conventional boom 60 folded into a square shape. It is possible to return.
  • FIG. 10 shows the difference in the forward turning radius.
  • FIG. 10 (a) shows a hydraulic excavator 1 having a front attachment constituted by the boom of the present invention, and FIG. This is a hydraulic excavator 60 with a front attachment composed of a boom.
  • Boom 6 can be shaped substantially the same as a single boom and does not require significant design changes.
  • the conventional split-type boom is configured so that the capacity of the second boom cylinder cannot be fully utilized. Since the cylinder holding force of the boom cylinder can be increased, a long boom can be manufactured.
  • the boom cylinder can be short, it is possible to obtain sufficient pulling side thrust without the risk of buckling even if the rod diameter is designed to be thin.
  • the cylinder pin position (rod side pin position) of the second boom cylinder 12 for raising and lowering the second boom 6b is a position for raising and lowering the second boom 6b more efficiently without damaging the boom shape. Is arranged.
  • the undulation force of the second boom 6b depends on the distance L1 between points A and C.
  • the cylinder pin position is at the virtual point V, so the distance between points A and V is L2.
  • FIG. 12 shows an example in which the boom of the present invention is applied to a small hydraulic excavator.
  • a boom cylinder 69 for raising and lowering the boom 68 is used as the boom 68. It is provided on the front side of!!
  • the second boom cylinder 70 is provided on the left and right sides of the first boom 68a, specifically on the part that does not interfere with the boom cylinder 69. Just place a pair! /
  • a pair of brackets 68c, 68d (only the front bracket 68c is shown) are extended in parallel from the rear end of the second boom 68b,
  • the bracket 68c and the boss 68e provided on one side of the first boom 68a are connected by a first second cylinder 70 via a pin, and the other bracket 68d and the other side of the first boom 68a are connected to the other side of the first boom 68a.
  • the provided boss 68f (not shown) is connected to the second boom cylinder 71 (not shown) via a pin.
  • FIG. 14 shows a configuration when a working device such as a crusher or a breaker is mounted on the boom of the present invention.
  • a working device such as a crusher or a breaker
  • the crusher installation example and the breaker installation example are shown together on the same drawing.
  • 80 is a crusher mounted on the tip of the boom 6, and 81 is a breaker.
  • the bracket 80a of the crusher 80 is attached to the tip of the second boom 6b, and the optional hydraulic piping routed to the second boom 6b is built into the crusher 80. It is connected to the hydraulic cylinder for driving the crusher.
  • the second boom 6b can function as an arm, so that the arm is not required and the front attachment can be made compact.
  • the working range can be increased while being compact, so that the working environment in which the height direction is restricted as in the case where there is a ceiling above, for example, underground or tunnel.
  • the bracket 81a of the breaker 81 is attached to the tip of the second boom 6b, and the optional hydraulic piping routed to the second breaker 6b is attached to the breaker 81. Connect to the built-in chisel driving striking cylinder.
  • the second boom 6b can function as an arm, so that the front attachment can be made compact.
  • the work range can be expanded by turning the second boom 6b in the same manner as described above, work in a narrow space can be performed efficiently.
  • the length of the front attachment can be shortened and a large working device with high ability can be mounted.
  • disassembling the foot It is also suitable for dismantling work that moves the work place downstairs.
  • the boom of the present invention has a feature that the work range is wide while being compact, the work device can be mounted without exchanging with a special boom.
  • the boom of the working machine according to the present invention is a front end of a hydraulic excavator for general civil engineering. It can be applied not only to tachment, but also to dedicated construction machines such as building demolition machines and crushers that crush reinforced concrete.Furthermore, front attachments such as dedicated cargo handling machines and dedicated forestry machines equipped with grapples It can also be applied widely.

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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

L'objet de la présente invention concerne la flèche d'une machine dont la capacité de travail est améliorée sans augmentation de la taille de cette flèche segmentée. La flèche comporte un premier bras (6a), un second bras (6b) et un second vérin de flèche (12). Le premier bras (6a) est soutenu à sa base par le corps de la machine. Un bras ou un dispositif de travail est relié à l'extrémité avant du second bras (6b). Le premier et le second bras (6a, 6b) sont reliés entre eux de manière à pouvoir pivoterautour d'un d'axe horizontal (6c). Le second vérin de flèche (12) pivote autour du second bras (6b). Une section de tige de connexion (61) àlaquelle une tige de piston (12b) du second vérin de flèche (12) est reliée se trouve formée sur le second bras (6b), à son extrémité, et du côté où le premier bras est relié. L'extrémité arrière (12a) du second vérin de flèche (12) reliée à la section de tige de connexion (61) est supportée par le premier bras (6a).
PCT/JP2007/070827 2006-10-31 2007-10-25 Flèche et fixation avant de machine Ceased WO2008053779A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006-296383 2006-10-31
JP2006296383 2006-10-31
JP2007-238095 2007-09-13
JP2007238095A JP5223276B2 (ja) 2006-10-31 2007-09-13 作業機械のブームおよびフロントアタッチメント

Publications (1)

Publication Number Publication Date
WO2008053779A1 true WO2008053779A1 (fr) 2008-05-08

Family

ID=39344121

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/070827 Ceased WO2008053779A1 (fr) 2006-10-31 2007-10-25 Flèche et fixation avant de machine

Country Status (2)

Country Link
JP (1) JP5223276B2 (fr)
WO (1) WO2008053779A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948392A (zh) * 2013-06-28 2017-07-14 株式会社久保田 作业机的动臂及作业机
EP4108835A1 (fr) * 2021-06-22 2022-12-28 Robert Schreiber Minipelle à flèche variable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4798228B2 (ja) * 2009-01-16 2011-10-19 コベルコ建機株式会社 作業機械のブーム
JP5685667B1 (ja) * 2014-05-19 2015-03-18 株式会社ケーエス・トクシュ興業 建物解体用のバケット式掘削機のブームかさ上げ機構

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02144045U (fr) * 1989-05-11 1990-12-06
JPH06220884A (ja) * 1993-01-21 1994-08-09 Yanmar Diesel Engine Co Ltd バックホーのブーム構造
JPH10121505A (ja) * 1996-10-15 1998-05-12 Komatsu Ltd 油圧ショベルの作業機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02144045U (fr) * 1989-05-11 1990-12-06
JPH06220884A (ja) * 1993-01-21 1994-08-09 Yanmar Diesel Engine Co Ltd バックホーのブーム構造
JPH10121505A (ja) * 1996-10-15 1998-05-12 Komatsu Ltd 油圧ショベルの作業機

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948392A (zh) * 2013-06-28 2017-07-14 株式会社久保田 作业机的动臂及作业机
US10190284B2 (en) 2013-06-28 2019-01-29 Kubota Corporation Boom for a working machine with a partition inside the boom
EP4108835A1 (fr) * 2021-06-22 2022-12-28 Robert Schreiber Minipelle à flèche variable

Also Published As

Publication number Publication date
JP5223276B2 (ja) 2013-06-26
JP2008133713A (ja) 2008-06-12

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