WO2009145000A1 - Construction machine - Google Patents
Construction machine Download PDFInfo
- Publication number
- WO2009145000A1 WO2009145000A1 PCT/JP2009/055975 JP2009055975W WO2009145000A1 WO 2009145000 A1 WO2009145000 A1 WO 2009145000A1 JP 2009055975 W JP2009055975 W JP 2009055975W WO 2009145000 A1 WO2009145000 A1 WO 2009145000A1
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- WO
- WIPO (PCT)
- Prior art keywords
- boom
- cylinder
- end side
- positioning cylinder
- connecting pin
- Prior art date
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Classifications
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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
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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
- E02F3/30—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
Definitions
- the present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with a first boom and a second boom as work devices.
- a hydraulic excavator as a typical example of a construction machine is a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and an uplifting motion on the front side of the upper revolving body. It is roughly constituted by a working device that can be provided.
- the working device normally has a boom whose base end side is rotatably connected to the upper swing body, an arm rotatably connected to the distal end side of the boom, and is rotatable to the distal end side of the arm And a boom cylinder, an arm cylinder, and a work tool cylinder for operating these booms, arms, and work tools.
- a working device of a two-piece boom specification in which the boom is divided into a first boom and a second boom.
- the two-piece boom includes a first boom whose base end is rotatably connected to the upper swing body using a first boom connecting pin, and a second boom connecting pin on the distal end side of the first boom.
- the second boom is movably connected, the boom cylinder moves the first boom up and down relative to the upper swing body, and the positioning cylinder moves the second boom up and down relative to the first boom.
- the arm is connected to the tip side of the two booms so as to be rotatable.
- the two-piece boom specification working device can appropriately adjust the folding angle of the first boom and the second boom by moving the second boom up and down with respect to the first boom by the positioning cylinder.
- the workability of the excavation work can be increased by adjusting the folding angle of the first boom and the second boom according to the excavation depth to widen the movable range of the working device.
- the entire working device can be folded compactly by pulling the second boom toward the first boom (Patent Document 1: Japanese Patent Laid-Open No. 11-93199). (See Japanese Patent Laid-Open No. 2002-220851).
- brackets for positioning cylinders are provided on the outer side surface (rear surface) of the first boom and the base end portion of the second boom, respectively.
- the positioning cylinder has a base end connected to a bracket provided on the outer surface of the first boom, and a tip end connected to a bracket provided on the base end of the second boom. Then, by extending and retracting the positioning cylinder, the second boom moves up and down with respect to the first boom around the second boom connecting pin, and the folding angle between the two booms changes.
- a bracket is joined to the outer surface of the first boom by welding, and the base end side of the positioning cylinder is connected to the bracket.
- the present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a construction machine in which a positioning cylinder can be stably operated over a long period of time.
- the present invention includes a self-propelled vehicle body and a work device provided on the vehicle body so as to be able to move up and down.
- a first boom coupled via a first boom; a second boom coupled to the distal end of the first boom via a second boom coupling pin; and a boom cylinder that moves the first boom up and down relative to the vehicle body.
- a positioning cylinder that raises and lowers the second boom to adjust the folding angle of the second boom with respect to the first boom.
- a feature of the configuration employed by the present invention is that the base end side of the positioning cylinder is mounted coaxially with the base end side of the first boom using the first boom connecting pin, and the tip end side of the positioning cylinder is It is attached to the second boom.
- the base end side of the positioning cylinder can be securely attached to the first boom connecting pin, and the positioning cylinder can be It can be operated stably over a long period of time.
- the present invention lies in a configuration in which the first boom is provided with a cylinder accommodating portion that accommodates a part of the positioning cylinder at a portion facing the positioning cylinder.
- a part of the positioning cylinder can be accommodated in the cylinder accommodating portion of the first boom with the proximal end side of the positioning cylinder attached to the first boom connecting pin. For this reason, even when the base end side of the positioning cylinder is attached using the existing first boom connecting pin that connects the first boom and the vehicle body, the first boom and the positioning cylinder do not interfere with each other.
- the positioning cylinder can be operated properly. Further, when excavation work or the like is performed using the work device, it is possible to prevent earth and sand from colliding with the positioning cylinder.
- the first boom includes left and right foot portions that are spaced apart from each other to the left and right, and a rectangular tube portion that is fixed to the front end side of the left and right foot portions.
- a pin insertion hole into which the first boom connecting pin is inserted is provided on the base end side of the left and right foot parts, and a part of the positioning cylinder is provided between the left and right foot parts.
- a cylinder accommodating portion to be accommodated may be provided, and a base end side of the positioning cylinder may be disposed in the cylinder accommodating portion.
- the inner portion of the cylinder housing portion is configured to be closed by a plate provided on the first boom. Thereby, it can prevent that a rock, earth and sand, etc. penetrate
- a cylinder bracket is provided on the lower surface side of the second boom at a position spaced from the second boom connecting pin, and the tip end side of the positioning cylinder is attached to the cylinder bracket. is there.
- the cylinder bracket for attaching the leading end side of the positioning cylinder is provided near the second boom connecting pin and provided on the lower surface side of the second boom. Therefore, the positioning cylinder is connected to the first boom and the second boom. Can be placed in between. Thereby, for example, when excavation work such as earth and sand is performed using the work device, it is possible to suppress the positioning cylinder from interfering with an obstacle present around the work device, and it is possible to secure a wide work range.
- the base end side of the boom cylinder is positioned on the front side of the first boom connecting pin and is attached to the vehicle body, and the tip end side of the boom cylinder is the second boom connecting pin using the second boom connecting pin.
- the configuration is such that the second boom is attached coaxially to the base end side.
- FIG. 1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a front view of the principal part expansion of a partially broken part which shows the turning frame in FIG. 1, a 1st boom, a 2nd boom, a positioning cylinder, etc. It is the front view of the principal part expansion of the same partial fracture
- reference numeral 1 denotes a wheel-type hydraulic excavator as a construction machine.
- the hydraulic excavator 1 is mounted on a self-propelled wheel-type lower traveling body 2 and is pivotably mounted on the lower traveling body 2 so as to travel in the lower part.
- the upper revolving body 3 which comprises a vehicle body with the body 2 is comprised roughly by the below-mentioned working apparatus 11 provided in the front part side of the upper revolving body 3 so that a vertical movement was possible.
- the lower traveling body 2 is composed of a track frame 2A and front, rear, left and right wheels 2B, 2B,... Provided on the track frame 2A and driven by a hydraulic motor (not shown). Has been. And the lower traveling body 2 is self-propelled on a road or a work site by driving each wheel 2B.
- the upper swing body 3 includes a swing frame 4 serving as a base that is pivotably mounted on the track frame 2A of the lower traveling body 2, and a cab that is provided on the left side of the front portion of the swing frame 4 and defines a cab. 5 and a counterweight 6 provided on the rear end side of the swivel frame 4 to balance the weight with the work device 11, and an engine and a hydraulic pump (not shown) provided on the front side of the counterweight 6 are accommodated.
- the building cover 7 is roughly constituted by a hydraulic oil tank 8 and a fuel tank 9 provided on the front side of the building cover 7.
- the revolving frame 4 is provided with a thick bottom plate 4A extending in the front and rear directions, and standing on the bottom plate 4A, and front and rear with a predetermined interval in the left and right directions.
- a strong support structure including left and right vertical plates 4B (only the right side is shown) extending in the direction is formed.
- a boom bracket portion 4C to which a base end side of a first boom 12 described later is rotatably attached and a base end side of a boom cylinder 28 described later is rotatable. Is provided with a cylinder bracket portion 4D.
- a counterweight 6 is attached to the rear end side of the left and right vertical plates 4B.
- the position of the boom bracket portion 4C is higher in the front and rear directions than in the cylinder bracket portion 4D and in the upper and lower directions.
- the working device 11 is a working device provided on the front side of the revolving frame 4 constituting the upper revolving body 3 so as to be able to be lifted and lowered.
- the working device 11 includes a first boom 12, a second boom 18, an arm 23, and a bucket, which will be described later. 25, a boom cylinder 28, a positioning cylinder 30, an arm cylinder 32, a bucket cylinder 33, and the like, and perform excavation work of earth and sand.
- the first boom 12 is a first boom that is rotatably attached to the boom bracket portion 4C of the revolving frame 4.
- the first boom 12 constitutes a two-piece boom together with a second boom 18 described later.
- the first boom 12 includes left and right foot portions 13 and 13 made of solid castings arranged at intervals in the left and right directions, It is generally constituted by a rectangular tube portion 14 made of a hollow can-making structure fixed to the distal end side of the right foot portion 13.
- each foot portion 13 located on the base end side of the first boom 12 are each configured as a solid cast body formed of cast iron. That is, each foot portion 13 has a length approximately half of the length dimension of the first boom 12, the base end side is thick in the left and right directions, and gradually increases from the base end side toward the distal end side. Each is formed by casting means so as to be thin. Each foot portion 13 extends in the longitudinal direction at a constant distance from each other, and a pin insertion hole 13A through which a first boom connecting pin 17 described later is inserted is provided on the left side of each foot portion 13. , Extending in the right direction. Further, a cylinder accommodating portion 15 described later is formed between the left and right foot portions 13.
- the rectangular tube portion 14 located on the front end side of the first boom 12 is configured as a hollow can-making structure by welding steel plates. That is, the rectangular tube portion 14 is opposed to the left and right web plates 14A and 14B facing each other at a constant interval in the left and right directions, and the upper and lower surfaces facing each other in the upper and lower directions with the web plates 14A and 14B interposed therebetween.
- the flange plates 14C and 14D are formed as square cylinders having a square cross section.
- the distal ends of the left and right foot portions 13 are inserted into the proximal end side of the rectangular tube portion 14, and the left and right web plates 14A and 14B constituting the rectangular tube portion 14 are arranged on the upper and lower sides.
- the flange plates 14C and 14D are firmly joined by welding.
- the upper flange plate 14 ⁇ / b> C extends along the left and right foot portions 13 to the vicinity of the pin insertion hole 13 ⁇ / b> A and is welded over substantially the entire area of the left and right foot portions 13.
- a base end side of the rectangular tube portion 14 that is, a longitudinal intermediate portion of the upper flange plate 14C, a base end portion of the lower flange plate 14D, and the left and right foot portions 13 are located on the base end side closing plate. 14E. Accordingly, the base end side of the rectangular tube portion 14 is closed by the base end side closing plate 14E.
- a distal end side blocking plate 14F bent in a substantially U shape is joined by welding. ing. Therefore, the distal end side of the rectangular tube portion 14 is closed by the distal end side closing plate 14F.
- the cylinder housing part 15 is a cylinder housing part provided in the first boom 12, and the cylinder housing part 15 houses a part (base end side) of a positioning cylinder 30 to be described later.
- the cylinder housing portion 15 is formed in a portion of the first boom 12 that faces the positioning cylinder 30. That is, the cylinder accommodating portion 15 is a concave groove-like space surrounded by the left and right foot portions 13, the upper flange plate 14C of the rectangular tube portion 14, and the proximal end side blocking plate 14E of the rectangular tube portion 14. It is formed and extends in the longitudinal direction along the left and right foot portions 13 (see FIG. 5).
- the inner portion (outer side surface) of the cylinder housing portion 15 is closed by the upper flange plate 14C as a plate body, and the inner side surface is open.
- the base end side (in the embodiment, the cylinder tube side) of the positioning cylinder 30 accommodated in the cylinder accommodating portion 15 can be protected against intrusion of earth and sand. Further, the strength of the cylinder housing portion 15 can be increased.
- the left and right brackets 16 are a pair of left and right brackets provided at the distal end portion of the rectangular tube portion 14, and these left and right brackets 16 are rotatably attached to a proximal end side of a second boom 18 to be described later.
- the left and right brackets 16 are made of thick, flat plates that are substantially triangular, and the left and right web plates 14A and 14B that constitute the square tube portion 14 and the left end of the front end side blocking plate 14F. , And joined to the right side end by welding.
- a pin insertion hole 16 ⁇ / b> A through which a later-described second boom connecting pin 22 is inserted is formed at the distal end side of each bracket 16.
- Reference numeral 17 denotes a first boom connection pin that connects the boom bracket portion 4C of the revolving frame 4 and the base end side of the first boom 12, and the first boom connection pin 17 is connected to the boom bracket portion 4C of the revolving frame 4.
- the first boom 12 is rotatably supported.
- the first boom connecting pin 17 is inserted into the pin insertion hole 13 ⁇ / b> A of the left and right foot portions 13 constituting the first boom 12 and the boom bracket portion 4 ⁇ / b> C. Thereby, the front end side of the 1st boom 12 becomes a structure rotated to the up-down direction centering
- the first boom connecting pin 17 is also configured to be coaxially attached to the proximal end side of the positioning cylinder 30.
- 18 is a second boom that is rotatably attached to the distal end side of the first boom 12, and the second boom 18 constitutes a two-piece boom together with the first boom 12. Accordingly, the second boom 18 moves up and down with respect to the first boom 12 by the expansion and contraction of the positioning cylinder 30.
- the second boom 18 faces the left and right web plates 18A (shown only on the right side) facing each other at a constant interval in the left and right directions, and the upper and lower sides across the web plates 18A.
- the upper and lower flange plates 18B and 18C are formed as hollow rectangular cylinders (can-making structures) having a rectangular cross section over almost the entire longitudinal direction.
- a pair of left and right arm cylinder brackets 19 to which arm cylinders 32 to be described later are attached are provided on the base end side of the upper flange plate 18B constituting the second boom 18.
- a pair of left and right positioning cylinder brackets 20 to which the positioning cylinder 30 is attached are provided at positions slightly spaced from a second boom connecting pin 22 described later.
- a pair of left and right arm brackets 21 are provided on the distal end side of the second boom 18, and a base end side of an arm 23 described later is rotatably attached to the arm bracket 21. .
- Reference numeral 22 denotes a second boom connection pin that connects the distal end side of the first boom 12 and the proximal end side of the second boom 18, and the second boom connection pin 22 is connected to the first boom 12 in the second boom 18. Is rotatably supported.
- the second boom connecting pin 22 is inserted into a pin insertion hole 16 ⁇ / b> A of the bracket 16 provided in the first boom 12 and a boss portion (not shown) provided in the proximal end portion of the second boom 18. ing. Thereby, the front end side of the second boom 18 is configured to rotate upward and downward about the second boom connecting pin 22 with respect to the first boom 12.
- both end sides of the second boom connecting pin 22 protrude leftward and rightward from the bracket 16 of the first boom 12, and the protruding end of the second boom connecting pin 22 protruding from the bracket 16.
- a rod-side mounting eye 28B of a left and right boom cylinder 28, which will be described later, is rotatably attached to the portion (see FIG. 4).
- Reference numeral 23 denotes an arm rotatably attached to the distal end side of the second boom 18, and the arm 23 is a square cylinder having a square cross section surrounded by left and right web plates and upper and lower flange plates. It is formed as (can manufacturing structure).
- an arm cylinder bracket 23A to which an arm cylinder 32 described later is attached is provided, and a bucket cylinder bracket 23B to which a bucket cylinder 33 described later is attached is provided.
- a boss portion (not shown) through which an arm connecting pin 24 described later is inserted is provided on the side opposite to the bucket cylinder bracket 23B.
- a boss portion (not shown) through which a bucket connecting pin 26 described later is inserted is provided on the distal end side of the arm 23.
- the 24 is an arm connection pin that connects the tip side of the second boom 18 and the arm 23, and the arm connection pin 24 supports the arm 23 so as to be rotatable with respect to the second boom 18.
- the arm connecting pin 24 is inserted through the arm bracket 21 of the second boom 18 and a boss portion (not shown) provided on the proximal end side of the arm 23.
- the distal end side of the arm 23 is configured to rotate (up and down) with respect to the second boom 18 in the upward and downward directions around the arm connecting pin 24.
- each bucket link 27 is configured to be connected to a tip end side of a bucket cylinder 33 described later.
- the left and right boom cylinders 28 are provided on both the left and right sides of the first boom 12.
- the left and right boom cylinders 28 move the first boom 12 up and down with respect to the revolving frame 4. It is.
- a bottom side mounting eye 28A is provided on the cylinder tube bottom side (base end side) of the boom cylinder 28, and the bottom side mounting eye 28A is positioned in front of the first boom connecting pin 17 and swivels. It is attached to the cylinder bracket portion 4D of the frame 4 through a connecting pin 29 so as to be rotatable.
- a rod side mounting eye 28B is provided on the rod tip side of the boom cylinder 28, and the rod side mounting eye 28B is rotatably attached to the second boom connecting pin 22.
- the rod side mounting eye 28 ⁇ / b> B which is the tip side of the boom cylinder 28, uses the second boom connection pin 22 that connects the first boom 12 and the second boom 18, and the second boom 18. It is attached coaxially with the base end side.
- the positioning cylinder 30 is a positioning cylinder that moves the second boom 18 up and down with respect to the first boom 12.
- the positioning cylinder 30 adjusts the angle between the first boom 12 and the second boom 18 around the second boom connecting pin 22, that is, the folding angle of the second boom 18 with respect to the first boom 12.
- a bottom side mounting eye 30 A is provided on the cylinder tube bottom side (base end side) of the positioning cylinder 30, and the bottom side mounting eye 30 A is provided between the left and right foot portions 13 constituting the first boom 12. And is pivotally attached to the first boom connecting pin 17.
- the bottom mounting eye 30 ⁇ / b> A that is the base end side of the positioning cylinder 30 uses the first boom connection pin 17 that connects the revolving frame 4 and the first boom 12 to the first boom 12. It is attached coaxially with the base end side.
- the connecting pin 31 is disposed in the vicinity of the second boom connecting pin 22.
- a rod side mounting eye 30B is provided on the rod side (front end side) of the positioning cylinder 30, and the rod side mounting eye 30B is attached to the positioning cylinder bracket 20 provided on the lower flange plate 18C of the second boom 18. It is rotatably attached via a connecting pin 31.
- the second boom 18 is moved up and down around the second boom connecting pin 22 with respect to the first boom 12, and the first boom 12 is moved.
- the folding angle of the second boom 18 can be adjusted as appropriate.
- the positioning cylinder 30 can be operated properly, and when the excavation work is performed using the work device 11, the positioning cylinder 30 can be prevented from colliding with earth and sand.
- the arm 23 is an arm cylinder provided between the second boom 18 and the arm 23, and the cylinder tube bottom side of the arm cylinder 32 is pin-coupled to the arm cylinder bracket 19 of the second boom 18, and the rod of the arm cylinder 32 The side is pin-coupled to the arm cylinder bracket 23 ⁇ / b> A of the arm 23. Accordingly, the arm 23 is configured to rotate upward and downward on the distal end side of the second boom 18 by expanding and contracting the arm cylinder 32.
- the bucket 25 is configured to rotate upward and downward on the tip side of the arm 23 by extending and contracting the bucket cylinder 33.
- the hydraulic excavator 1 according to the present embodiment has the working device 11 as described above, and when excavating soil and the like using this working device 11, the hydraulic excavator 1 is a wheel type undercarriage 2. To self-propelled to the work site.
- the second boom with respect to the first boom 12 is achieved by extending or reducing the positioning cylinder 30 according to the depth of the shaft to be excavated, for example.
- the folding angle of 18 is adjusted appropriately.
- the folding angle of the second boom 18 relative to the first boom 12 can be set large. Accordingly, by moving the boom cylinder 28 in this state, the first boom 12 and the second boom 18 can move up and down with respect to the revolving frame 4 while maintaining a constant folding angle.
- first boom 12 and the second boom 18 integrated with a fixed folding angle are moved up and down by the boom cylinder 28, and the arm cylinder 32 and the bucket cylinder 33 are extended or reduced, A vertical shaft can be excavated in the ground by the bucket 25.
- the bottom-side mounting eye 30A serving as the base end side of the positioning cylinder 30 is attached to the first boom connecting pin 17 that connects the base end side of the first boom 12 to the revolving frame 4.
- the cylinder housing 15 surrounded by is provided. Thereby, even when the bottom side mounting eye 30 ⁇ / b> A that is the base end side of the positioning cylinder 30 is attached to the first boom connecting pin 17, a part (base) of the positioning cylinder 30 is placed in the cylinder housing portion 15 of the first boom 12. End side) can be accommodated.
- the first boom 12 and the positioning cylinder 30 do not interfere with each other, and the positioning cylinder 30 can always be operated properly.
- the positioning cylinder 30 can suppress that earth and sand collide with the positioning cylinder 30 at the time of excavation work, and can protect the positioning cylinder 30.
- the outer surface (back part) of the cylinder housing part 15 is closed by the upper flange plate 14C, the proximal end side of the positioning cylinder 30 housed in the cylinder housing part 15 is protected from intrusion of earth and sand. can do.
- the positioning cylinder bracket 20 for attaching the rod side mounting eye 30B of the positioning cylinder 30 is provided in the lower flange plate 18C of the second boom 18 in the vicinity of the second boom connecting pin 22. For this reason, the positioning cylinder 30 can be disposed so as to be sandwiched between the inner surface of the first boom 12 and the inner surface of the second boom 18. As a result, when excavation work is performed, the positioning cylinder 30 can be prevented from interfering with obstacles around the work device 11, and a wide work range can be secured.
- the rod side mounting eye 28B which is the distal end side of the boom cylinder 28, is configured to be coaxially mounted using the existing second boom connection pin 22 that connects the first boom 12 and the second boom 18. .
- the number of parts can be reduced, and the manufacturing cost of the first boom 12 can be reduced accordingly.
- the cylinder accommodating portion 15 of the first boom 12 is substantially orthogonal to the longitudinal direction of the upper flange plate 14C of the square tube portion 14, the left and right foot portions 13, and the foot portion 13.
- occlusion board 14E extended in the direction is illustrated.
- the present invention is not limited to this, and may be configured as, for example, a modification shown in FIG.
- reference numeral 14 ⁇ / b> E ′ denotes a base end side closing plate according to a modification
- the base end side closing plate 14 ⁇ / b> E ′ extends along the longitudinal direction of the positioning cylinder 30 with the positioning cylinder 30 being contracted to the minimum. It is arranged to extend.
- a space surrounded by the base end side closing plate 14E ′, the upper flange plate 14C of the rectangular tube portion 14, and the left and right foot portions 13 is configured as a cylinder housing portion 15 ′.
- the proximal-side closing plate 14E ′ is a plate that closes the inner portion of the cylinder housing portion 15 ′.
- the 1st boom 12 is made into the left and right foot parts 13 which consist of a casting body, and the square cylinder part 14 which consists of a can-making structure joined to each foot part 13 by welding,
- the case where the cylinder accommodating part 15 is formed between the left and right foot parts 13 is illustrated.
- the present invention is not limited to this, and the entire first boom including the left and right foot portions is formed by a hollow can-making structure, and the positioning cylinder 30 of the first boom including the can-making structure It is good also as a structure which provides a concave cylinder-shaped cylinder accommodating part by denting the site
- the positioning cylinder 30 has exemplified the case where the bottom side mounting eye 30A is connected to the first boom connecting pin 17 coaxially.
- the present invention is not limited to this, and the rod-side mounting eye 30B of the positioning cylinder 30 may be connected to the first boom connecting pin 17 coaxially.
- the rod-side mounting eye 30B is the proximal end side
- the bottom-side mounting eye 30A is the distal end side.
- a wheel-type hydraulic excavator 1 having wheels 2B as a construction machine is described as an example.
- the present invention is not limited to this, and can be applied to, for example, a crawler hydraulic excavator as long as it has a two-piece boom type boom including a first boom and a second boom.
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Abstract
Description
2 下部走行体(車体)
3 上部旋回体(車体)
4 旋回フレーム
11 作業装置
12 第1ブーム
13 フート部
13A ピン挿通孔
14 角筒部
14C 上フランジ板(板体)
14E′ 基端側閉塞板(板体)
15,15′ シリンダ収容部
17 第1ブーム連結ピン
18 第2ブーム
20 ポジショニングシリンダブラケット(シリンダブラケット)
22 第2ブーム連結ピン
28 ブームシリンダ
30 ポジショニングシリンダ
30A ボトム側取付アイ(基端側)
30B ロッド側取付アイ(先端側) 1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 Rotating
14E 'Base end side blocking plate (plate)
15, 15 ′
22 Second
30B Rod side mounting eye (tip side)
Claims (6)
- 自走可能な車体と、該車体に俯仰動可能に設けられた作業装置とからなり、前記作業装置は、基端側が前記車体に第1ブーム連結ピンを介して連結された第1ブームと、該第1ブームの先端側に第2ブーム連結ピンを介して連結された第2ブームと、前記車体に対して前記第1ブームを俯仰動させるブームシリンダと、前記第1ブームに対して前記第2ブームの折れ角度を調整すべく該第2ブームを俯仰動させるポジショニングシリンダとを備えてなる建設機械において、
前記ポジショニングシリンダの基端側は、前記第1ブーム連結ピンを用いて前記第1ブームの基端側と同軸に取付け、前記ポジショニングシリンダの先端側は前記第2ブームに取付ける構成としたことを特徴とする建設機械。 A self-propelled vehicle body, and a work device provided on the vehicle body so as to be able to move up and down. A second boom coupled to the distal end side of the first boom via a second boom coupling pin; a boom cylinder for raising and lowering the first boom relative to the vehicle body; and the first boom with respect to the first boom. 2) a construction machine comprising a positioning cylinder that moves the second boom up and down to adjust the folding angle of the boom;
The proximal end side of the positioning cylinder is attached coaxially with the proximal end side of the first boom using the first boom connecting pin, and the distal end side of the positioning cylinder is attached to the second boom. And construction machinery. - 前記第1ブームには、前記ポジショニングシリンダと対面する部位に前記ポジショニングシリンダの一部を収容するシリンダ収容部を設ける構成としてなる請求項1に記載の建設機械。 The construction machine according to claim 1, wherein the first boom is provided with a cylinder accommodating portion that accommodates a part of the positioning cylinder at a portion facing the positioning cylinder.
- 前記第1ブームは、左,右に離間して配置された左,右のフート部と、該左,右のフート部の先端側に固着された角筒部とにより構成し、前記左,右のフート部の基端側には前記第1ブーム連結ピンが挿入されるピン挿通孔を設け、前記左,右のフート部間には前記ポジショニングシリンダの一部を収容するシリンダ収容部を設け、前記ポジショニングシリンダの基端側は前記シリンダ収容部内に配置する構成としてなる請求項1に記載の建設機械。 The first boom includes left and right foot portions that are spaced apart from each other on the left and right sides, and a square tube portion that is fixed to the front end side of the left and right foot portions. A pin insertion hole into which the first boom connecting pin is inserted is provided on the base end side of the foot part, and a cylinder housing part for housing a part of the positioning cylinder is provided between the left and right foot parts, The construction machine according to claim 1, wherein a base end side of the positioning cylinder is arranged in the cylinder housing portion.
- 前記シリンダ収容部の奥部は、前記第1ブームに設けられた板体によって閉塞する構成としてなる請求項2または3に記載の建設機械。 The construction machine according to claim 2 or 3, wherein a back portion of the cylinder housing portion is configured to be closed by a plate provided on the first boom.
- 前記第2ブームの内面側には、前記第2ブーム連結ピンの位置から前方に離間した位置にシリンダブラケットを設け、前記ポジショニングシリンダの先端側は、該シリンダブラケットに取付ける構成としてなる請求項1に記載の建設機械。 The cylinder bracket is provided on the inner surface side of the second boom at a position spaced forward from the position of the second boom connecting pin, and the distal end side of the positioning cylinder is attached to the cylinder bracket. The construction machine described.
- 前記ブームシリンダの基端側は前記第1ブーム連結ピンよりも前側に位置して前記車体に取付け、前記ブームシリンダの先端側は前記第2ブーム連結ピンを用いて前記第2ブームの基端側と同軸に取付ける構成としてなる請求項1に記載の建設機械。 The base end side of the boom cylinder is located on the front side of the first boom connecting pin and is attached to the vehicle body, and the tip end side of the boom cylinder is the base end side of the second boom using the second boom connecting pin. The construction machine according to claim 1, wherein the construction machine is configured to be coaxially attached to the machine.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801077883A CN101960074A (en) | 2008-05-28 | 2009-03-25 | Construction machine |
JP2010514407A JPWO2009145000A1 (en) | 2008-05-28 | 2009-03-25 | Construction machinery |
EP09754508A EP2290163A1 (en) | 2008-05-28 | 2009-03-25 | Construction machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008139443 | 2008-05-28 | ||
JP2008-139443 | 2008-05-28 |
Publications (1)
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WO2009145000A1 true WO2009145000A1 (en) | 2009-12-03 |
Family
ID=41376886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/055975 WO2009145000A1 (en) | 2008-05-28 | 2009-03-25 | Construction machine |
Country Status (5)
Country | Link |
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EP (1) | EP2290163A1 (en) |
JP (1) | JPWO2009145000A1 (en) |
KR (1) | KR20110021703A (en) |
CN (1) | CN101960074A (en) |
WO (1) | WO2009145000A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200354920A1 (en) * | 2018-01-23 | 2020-11-12 | Kubota Corporation | Control method of working machine, program, and storage medium thereof |
US12024850B2 (en) * | 2018-01-23 | 2024-07-02 | Kubota Corporation | Working machine and control method of working machine |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5756171B2 (en) * | 2011-05-12 | 2015-07-29 | 日立建機株式会社 | Construction machinery |
JP5708369B2 (en) * | 2011-08-24 | 2015-04-30 | コベルコ建機株式会社 | Work machine |
CN104846860B (en) * | 2015-05-28 | 2017-08-25 | 南宁远卓新能源科技有限公司 | A kind of three sections of arm-type excavators |
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JPH07243223A (en) * | 1994-03-07 | 1995-09-19 | Hitachi Constr Mach Co Ltd | Swing type excavator |
JPH08260503A (en) * | 1995-03-22 | 1996-10-08 | Kubota Corp | Boom structure of backhoe |
JPH09165772A (en) * | 1995-12-18 | 1997-06-24 | Shin Caterpillar Mitsubishi Ltd | Construction machine |
JPH1193199A (en) | 1997-09-16 | 1999-04-06 | Hitachi Constr Mach Co Ltd | Front controller for articulated construction machine |
JP2002220851A (en) | 2001-01-25 | 2002-08-09 | Hitachi Constr Mach Co Ltd | Hydraulic backhoe |
JP2005090134A (en) * | 2003-09-18 | 2005-04-07 | Hitachi Constr Mach Co Ltd | Construction machine |
-
2009
- 2009-03-25 WO PCT/JP2009/055975 patent/WO2009145000A1/en active Application Filing
- 2009-03-25 CN CN2009801077883A patent/CN101960074A/en active Pending
- 2009-03-25 EP EP09754508A patent/EP2290163A1/en not_active Withdrawn
- 2009-03-25 KR KR1020107013644A patent/KR20110021703A/en not_active Application Discontinuation
- 2009-03-25 JP JP2010514407A patent/JPWO2009145000A1/en active Pending
Patent Citations (6)
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JPH07243223A (en) * | 1994-03-07 | 1995-09-19 | Hitachi Constr Mach Co Ltd | Swing type excavator |
JPH08260503A (en) * | 1995-03-22 | 1996-10-08 | Kubota Corp | Boom structure of backhoe |
JPH09165772A (en) * | 1995-12-18 | 1997-06-24 | Shin Caterpillar Mitsubishi Ltd | Construction machine |
JPH1193199A (en) | 1997-09-16 | 1999-04-06 | Hitachi Constr Mach Co Ltd | Front controller for articulated construction machine |
JP2002220851A (en) | 2001-01-25 | 2002-08-09 | Hitachi Constr Mach Co Ltd | Hydraulic backhoe |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20200354920A1 (en) * | 2018-01-23 | 2020-11-12 | Kubota Corporation | Control method of working machine, program, and storage medium thereof |
US12024850B2 (en) * | 2018-01-23 | 2024-07-02 | Kubota Corporation | Working machine and control method of working machine |
Also Published As
Publication number | Publication date |
---|---|
KR20110021703A (en) | 2011-03-04 |
CN101960074A (en) | 2011-01-26 |
EP2290163A1 (en) | 2011-03-02 |
JPWO2009145000A1 (en) | 2011-10-06 |
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