EP3530816B1 - Hydraulic shovel - Google Patents

Hydraulic shovel Download PDF

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Publication number
EP3530816B1
EP3530816B1 EP18761799.8A EP18761799A EP3530816B1 EP 3530816 B1 EP3530816 B1 EP 3530816B1 EP 18761799 A EP18761799 A EP 18761799A EP 3530816 B1 EP3530816 B1 EP 3530816B1
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EP
European Patent Office
Prior art keywords
revolving
plate
guide
vertical plate
hydraulic
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.)
Active
Application number
EP18761799.8A
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German (de)
English (en)
French (fr)
Other versions
EP3530816A4 (en
EP3530816A1 (en
Inventor
Yutaka Tanaka
Makoto Motozu
Kohei Maeda
Kohei Urase
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.)
Hitachi Construction Machinery Tierra Co Ltd
Original Assignee
Hitachi Construction Machinery Tierra Co Ltd
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Application filed by Hitachi Construction Machinery Tierra Co Ltd filed Critical Hitachi Construction Machinery Tierra Co Ltd
Publication of EP3530816A1 publication Critical patent/EP3530816A1/en
Publication of EP3530816A4 publication Critical patent/EP3530816A4/en
Application granted granted Critical
Publication of EP3530816B1 publication Critical patent/EP3530816B1/en
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Classifications

    • 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
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2275—Hoses and supports therefor and protection therefor
    • 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

Definitions

  • the present invention relates to a hydraulic excavator that is provided with a front device driven by an actuator, for example.
  • a hydraulic excavator is configured by a lower traveling structure, an upper revolving structure supported on the lower traveling structure through a revolving device, and a front device that is provided on the upper revolving structure to be capable of lifting and tilting thereto and is driven by a plurality of actuators.
  • the upper revolving structure is configured by including a revolving frame that includes a bottom plate attached to the revolving device, a left vertical plate and a right vertical plate provided to rise up on the bottom plate to extend in a front-rear direction and to be spaced therebetween in a left-right direction and a front plate that is positioned in a front side of the left vertical plate and the right vertical plate to block a space between the left vertical plate and the right vertical plate, left and right front brackets that are positioned closer to the front side than the front plate of the revolving frame, are provided in the left vertical plate and the right vertical plate respectively and are provided with a foot part of a boom configuring part of the front device, an equipment device accommodating box that is positioned on the right side of the right front bracket and is provided in the revolving frame, a revolving motor of the revolving device that is positioned on a rear surface side of the front plate in the revolving frame and is provided on the bottom plate in a state of projecting
  • some of the hydraulic excavators are configured such that the upper revolving structure and the front device are capable of revolving in a revolving posture where the boom of the front device is tilted largely to the backward side and the upper revolving structure is capable of revolving within a range determined in advance to the vehicle width of the lower traveling structure ( WO 2001/029330 A1 and EP 1 176 259 A1 ).
  • EP 2 995 726 A1 , EP 2 787 128 A1 and JP 2016-075042 A respectively disclose excavators having a guide member for restricting flexion of hoses towards the rear of the excavator.
  • each of the hydraulic hoses extending toward the backside of the boom in the front device, for preventing a load from acting in a tension direction at the time of tilting the front device to the front side to excavate the ground has a length dimension set with an allowance in consideration of this posture. Accordingly, on the revolving posture of largely tilting the boom of the front device to the backward side to rise it up, a loosing part is formed in each of the hydraulic hoses between the foot part of the boom and the hose through opening of the revolving frame. In this case, the loosing part of each of the hydraulic hoses possibly interferes with equipment devices including the revolving motor arranged nearby.
  • the present invention is made in view of the foregoing problems in the conventional art, and an object of the present invention is to provide a hydraulic excavator that can prevent interference between a loosing part of a hydraulic hose and equipment devices in the periphery even when a front device is put in a revolving posture.
  • a hydraulic excavator comprises a lower traveling structure, an upper revolving structure supported on the lower traveling structure through a revolving device, and a front device provided on the upper revolving structure to be capable of lifting and tilting thereto and driven by a plurality of actuators, the upper revolving structure being configured by including a revolving frame that includes a bottom plate attached to the revolving device, a left vertical plate and a right vertical plate provided to rise up on the bottom plate to extend in a front-rear direction and to be spaced in a left-right direction and a front plate that is positioned in a front side of the left vertical plate and the right vertical plate to block a space between the left vertical plate and the right vertical plate, left and right front brackets that are positioned closer to the front side than the front plate of the revolving frame, are provided in the left vertical plate and the right vertical plate, respectively and are provided with a foot part of a boom configuring part of the front device, an equipment device accommodating box
  • a hydraulic excavator 1 is configured by an automotive lower traveling structure 2 of a crawler type, an upper revolving structure 4 mounted on the lower traveling structure 2 through a revolving device 3 to be capable of revolving thereon and a front device 5 provided on the front side of the upper revolving structure 4 in a front-rear direction to be capable of lifting and tilting thereto and perform an excavating operation of earth and sand.
  • the revolving device 3 is configured to include swing circles 3A provided between the lower traveling structure 2 and the upper revolving structure 4, and an after-described revolving motor 16 that drives/revolves the upper revolving structure 4.
  • a rear part (the outer peripheral surface 8A of the counterweight 8) of the upper revolving structure 4 can revolve within a virtual circle C drawn by the revolving radius R.
  • a size of the virtual circle C drawn by the rear part of the upper revolving structure 4 is set within a range (for example, within a range of 130% of a vehicle width dimension W) determined in advance to prevent the virtual circle C from being largely out of the vehicle width dimension W of the lower traveling structure 2 at the revolving of the upper revolving structure 4.
  • the front device 5 is provided in the front side of the upper revolving structure 4 to perform an excavating operation of earth and sand.
  • the front device 5 is configured by a boom 5A mounted to a left front bracket 7A and a right front bracket 7B of an after-described revolving frame 6 to be capable of lifting and tilting thereto, an arm 5B mounted to a tip end part of the boom 5A to be rotatable thereto, a bucket 5C mounted to a tip end part of the arm 5B to be rotatable thereto, and a boom cylinder 5D, an arm cylinder 5E and a bucket cylinder 5F as actuators for driving them.
  • other working tools including a breaker (not shown) that crushes rocks and concrete can be mounted by replacing the bucket 5C.
  • the boom 5A configuring part of the front device 5 is provided with a foot part 5A1 in the base end side, which is mounted to the front brackets 7A, 7B positioned in front upper parts of left and right vertical plates 6B, 6C to be rotatable thereto.
  • the boom cylinder 5D for lifting/tilting the boom 5A has a base end side that is mounted to a cylinder bracket 6N of the revolving frame 6 to be rotatable thereto.
  • a rear side of the boom 5A is shown as a backside 5A2.
  • the backside 5A2-side is provided with a plurality of, for example, six hydraulic lines 5G for delivery/discharge of pressurized oil to/from the arm cylinder 5E, the bucket cylinder 5F and additional actuators (not shown) (refer to Fig. 6 ).
  • the other end side of a hydraulic hose 19 to be described later is connected to an end part of the foot part 5A1-side of each of the hydraulic lines 5G.
  • the revolving frame 6 configures a mounting structure of the upper revolving structure 4.
  • the revolving frame 6 includes a bottom plate 6A that is made of a thick steel plate and extends in the front-rear direction, a left vertical plate 6B and a right vertical plate 6C that are provided to rise up on the bottom plate 6A and extend in the front-rear direction to have a predetermined space in the left-right direction, a left side frame 6D and a right side frame 6E that are arranged to be spaced from each other outside of the vertical plates 6B, 6C in the left-right direction and extend in the front-rear direction, a right front frame 6F extending to the left side from a front end part of the right side frame 6E, a plurality of extension beams 6G that extend in the left-right direction from the bottom plate 6A, and the vertical plates 6B, 6C, respectively and support the left and right side frames 6D, 6E at the tip end parts, under
  • a front plate 6K that is positioned in the front side of the left vertical plate 6B and the right vertical plate 6C and blocks a space between the left vertical plate 6B and the right vertical plate 6C is disposed in the revolving frame 6.
  • the front plate 6K is formed by a rising part 6K1 that is positioned closer to the front side of each of the vertical plates 6B, 6C and rises up from the bottom plate 6A, and an inclined part 6K2 that extends in an obliquely upper side toward the rear side from an upper end of the rising part 6K1.
  • the front plate 6K is fixed to the bottom plate 6A, and each of the vertical plates 6B, 6C, making it possible to enhance the rigidity of each of the vertical plates 6B, 6C.
  • a left section of the inclined part 6K2 is provided with, for example, two screw holes 6K3 having a plate thickness direction as an axis line to be spaced in the upper-lower direction.
  • the right vertical plate 6C is provided with an after-described hose through opening 18 that is positioned in a rear surface side of the rising part 6K1 in the front plate 6K.
  • two guide mounting brackets 6L are mounted to the right vertical plate 6C to be positioned closer to the rear side than the hose through opening 18.
  • Each of the guide mounting brackets 6L is formed of a plate body bent in an L-letter shape, and a screw hole 6M composed of a welding nut and the like is provided on a mounting surface of the guide mounting bracket 6L directed to the oblique lower side.
  • a cylinder bracket 6N is provided in front of the front plate 6K to mount a base end side of the boom cylinder 5D.
  • the left front bracket 7A and the right front bracket 7B are provided in the left and right vertical plates 6B, 6C to be positioned closer to the front side than the front plate 6K of the revolving frame 6.
  • the foot part 5A1 of the boom 5A configuring part of the front device 5 is mounted to each of the front brackets 7A, 7B to be rotatable in the upper-lower direction.
  • the counterweight 8 is mounted to the rear side of the revolving frame 6 to act as a weight balance to the front device 5.
  • the counterweight 8 is formed as a circular arc-shaped heavy load by projecting the center of the outer peripheral surface 8A in the left-right direction to the backward side, and the outer peripheral surface 8A being positioned in the outer peripheral side.
  • the outer peripheral surface 8A of the counterweight 8 is structured to be capable of revolving within a range determined in advance to the vehicle width dimension W of the lower traveling structure 2. That is, when the distance dimension from the revolving center O of the upper revolving structure 4 to the outer peripheral surface 8A of the counterweight 8 in the hydraulic excavator 1 is indicated at the revolving radius R, a trace drawn by the outer peripheral surface 8A of the counterweight 8 at the revolving operation is shown by a virtual circle C.
  • the diameter dimension of the virtual circle C can be accommodated in 130% of the vehicle width dimension W of the lower traveling structure 2 at the maximum by disposing the counterweight 8 close to the revolving center O. Accordingly, since the installation space for installing various equipment devices is made narrow in the hydraulic excavator 1, a revolving motor 16, each of hydraulic hoses 19 and a center joint 27 are arranged even in a narrow site in the rear side of the front plate 6K.
  • An engine 9 as a prime mover is mounted on the revolving frame 6 to be positioned in front of the counterweight 8 in a horizontal state extending in the left-right direction.
  • a hydraulic pump 10 to be driven by the engine 9 is mounted on the right side of the engine 9.
  • a heat exchanger 11 including a radiator and an oil cooler is disposed on the revolving frame 6 in the left side of the engine 9.
  • a cab 12 configures a housing, and is provided in the left front side of the revolving frame 6. That is, the cab 12 is disposed on a cab bed 6J in the left side of the left front bracket 7A out of the respective front brackets 7A, 7B.
  • the cab 12 forms a residence space in which an operator gets and is formed of a box body elongated in the upper-lower direction.
  • a hydraulic oil tank 13 and a fuel tank 14 are provided on the revolving frame 6 to be positioned on the right side of the right front bracket 7B in front of the engine 9.
  • the hydraulic oil tank 13 reserves hydraulic oil therein
  • the fuel tank 14 reserves therein fuel to be supplied to the engine 9.
  • the hydraulic oil tank 13 and the fuel tank 14 are arranged to line up in the left-right direction.
  • the hydraulic oil tank 13 and the fuel tank 14 may be arranged to line up in the front-rear direction.
  • an equipment device accommodating box 15 is disposed on the revolving frame 6 to be positioned in front of the hydraulic oil tank 13 and the fuel tank 14.
  • the equipment device accommodating box 15 is disposed on the right side of the right front bracket 7B.
  • the equipment device accommodating box 15 is formed as a boxy shape accommodating a control valve group 17 to be described later on the revolving frame 6 as a bottom part.
  • the revolving motor 16 is provided in a state of projecting to the upper side on the bottom plate 6A of the revolving frame 6 to be positioned on the right side of the cab 12 in the rear surface side of the front plate 6K in the revolving frame 6, that is, between the front plate 6K and the engine 9.
  • the revolving motor 16 is formed as a hydraulic motor as a driving source of the revolving device 3.
  • the revolving motor 16 is provided to be positioned near the rear side of the front plate 6K to face the front plate 6K.
  • the control valve group 17 is disposed in the equipment device accommodating box 15.
  • the control valve group 17 is configured by lining up a plurality of control valves.
  • a part of control valves is connected to the boom cylinder 5D in the front device 5 through an unillustrated hydraulic hose
  • a part of control valves is connected to the revolving motor 16 through an unillustrated hydraulic hose
  • a part of control valves is connected to the center joint 27 to be described later through an unillustrated hydraulic hose.
  • a part of control valves is connected to the arm cylinder 5E and the bucket cylinder 5F through respective hydraulic hoses 19A to 19D to be described later and the respective hydraulic lines 5G described above.
  • the hose through opening 18 is positioned in the rear surface side of the front plate 6K in the revolving frame 6 and is formed through the right vertical plate 6C in the left-right direction.
  • the hose through opening 18 is formed as a rectangular hole opened near the rear side of the rising part 6K1 of the front plate 6K.
  • the hose through opening 18 is communicated with the equipment device accommodating box 15.
  • after-described respective hydraulic hoses 19 that extend between the control valve group 17 and the front device 5 are inserted in the hose through opening 18.
  • each of the hydraulic hoses 19 (called each of the hydraulic hoses 19 as a whole) are for delivery/discharge of pressurized oil to/from the arm cylinder 5E and the bucket cylinder 5F in the front device 5. Accordingly, each of the hydraulic hoses 19 has one end side in the length direction that is connected to the control valve group 17 in the equipment device accommodating box 15. In addition, the other end side of each of the hydraulic hoses 19 extending to the boom 5A-side in the front device 5 is connected through the hose through opening 18 to an end part of each of the hydraulic lines 5G.
  • two hydraulic hoses 19A, 19B positioned in the left side out of the plurality of hydraulic hoses 19A to 19F are connected to the arm cylinder 5E in the front device 5 through the hydraulic lines 5G.
  • two hydraulic hoses 19C, 19D positioned in the center are connected to the bucket cylinder 5F through the hydraulic lines 5G.
  • two hydraulic hoses 19E, 19F positioned in the right side are connected to the hydraulic lines 5G as a preliminary line at the time of adding an optional actuator.
  • the lining order of the respective hydraulic hoses 19A to 19F differs depending upon the kind of a specification, and is not limited to the aforementioned one.
  • the hose guide 21 is positioned in the rear surface side of the front plate 6K in the revolving frame 6 to be provided in the state of being spaced from the rear surface. Following the revolving posture where the boom 5A in the front device 5 is largely tilted to the backward side (refer to Fig. 5 ), the hose guide 21 restricts the loosing part 20 of each of the hydraulic hoses 19 from being in contact with (interfering with) the revolving motor 16. Therefore, the hose guide 21 ensures (partitions) a movement space 26 to be described later in which the loosing part 20 of each of the hydraulic hoses 19 can move.
  • the hose guide 21 is configured by a plurality of guide bodies 22 that extend in the left-right direction and are provided to line up in the upper-lower direction in a state of having the movement space 26 in which the loosing part 20 of each of the hydraulic hoses 19 can move between the front plate 6K of the revolving frame 6 and the plurality of guide bodies 22, 22', 22", a left mounting member 23 that extends in the upper-lower direction to be provided to a left end part of each of the guide bodies 22 in the length direction, connects each of the guide bodies 22 thereto and is mounted to the revolving frame 6-side, and a right mounting member 24 that extends in the upper-lower direction to be provided to a right end part of each of the guide bodies 22 in the length direction, connects each of the guide bodies 22 thereto and is mounted to the revolving frame 6-side.
  • the plurality of guide bodies 22 each are, by bending one end part of an elongated round bar in an L-letter shape, formed by a long rear guide part 22A extending in the left-right direction and a short left guide part 22B extending to the upper side and the front side from the left end of the rear guide part 22A.
  • the guide bodies 22 comprise the minimum number of guide bodies enabling the loosing part 20 of each of the hydraulic hoses 19 to be stably guided, specifically nine guide bodies spaced in the upper-lower direction. It should be noted that the number of the guide bodies 22 is set depending upon a guiding range, the number of hydraulic hoses, a situation in the periphery and the like, and eight or less, or ten or more guide bodies may be provided.
  • Each of the guide bodies 22 extends in the left-right direction such that the rear guide part 22A is in parallel to an inclined part 6K2 of the front plate 6K.
  • the left guide part 22B extends to an oblique upper side toward the front side to be perpendicular to the inclined part 6K2 of the front plate 6K (to be vertical to the inclined part 6K2).
  • each of the rear guide parts 22A restricts the loosing part 20 of each of the hydraulic hoses 19 from loosing to the rear side to prevent each of the hydraulic hoses 19 from being in contact with (interfering with) the revolving motor 16.
  • each of the left guide parts 22B limits the movement of the loosing part 20 to the left side. That is, each of the left guide parts 22B prevents each of the hydraulic hoses 19 from being in contact with (interfering with) the left vertical plate 6B and welding parts in the periphery.
  • two guide bodies 22', 22" which are arranged in the lower side are provided to line up in the upper-lower direction along the rising part 6K1 of the front plate 6K, and the respective guide bodies 22 arranged in the upper side from the intermediate part in the upper-lower direction are provided to line up in an oblique direction along the inclined part 6K2.
  • the second guide body 22' from the bottom and the guide body 22" at the lowest part are formed to have longer left guide parts 22B than the other guide body 22.
  • each of the guide bodies 22, 22', 22" when each of the guide bodies 22, 22', 22" is mounted to the left mounting member 23 to be described later, each of the guide bodies 22, 22', 22" can be arranged in such a manner as to form a predetermined interval to the inclined part 6K2 of the front plate 6K and draw a smooth circular arc in the rising part 6K1-side by the guide bodies 22', 22" in the lower side. Therefore, each of the guide bodies 22, 22', 22” can guide each of the hydraulic hoses 19 smoothly.
  • each of the guide bodies 22, 22', 22" composed of the round bar can be smoothly in contact with each of the hydraulic hoses 19, and further, can prevent earth and sand, and the like from depositing thereon.
  • the guide body 22 positioned at the maximum upper part is disposed in a height position of being capable of suppressing each of the hydraulic hoses 19 connected to each of the hydraulic lines 5G in the front device 5 from flexing toward the revolving motor 16, specifically in a position near the upper end part of the inclined part 6K2 in the front plate 6K.
  • the guide body 22" positioned at the lowest part is disposed in a position where the loosing part 20 of each of the hydraulic hoses 19 is not in contact with the revolving motor 16 and the like in the periphery even in a case of becoming in a free state.
  • the hose guide 21 is disposed in a state having a constant interval from a rear surface of the front plate 6K.
  • the left mounting member 23 is configured by a flat guide mounting frame 23A formed to bend in an L-letter shape along the rising part 6K1 and the inclined part 6K2 of the front plate 6K, and, for example, two mounting plates 23B bending from each of the guide mounting frame 23A and extending to the left side to face the inclined part 6K2.
  • a bolt through hole 23B1 is formed in each of the mounting plates 23B in a position corresponding to each of screw holes 6K3 of the front plate 6K.
  • a front end part of the left guide part 22B of each of the guide bodies 22, 22', 22" is fixed to the guide mounting frame 23A by welding.
  • a right mounting member 24 is formed by bending a long plate body in the halfway position to be along the rising part 6K1 and the inclined part 6K2 of the front plate 6K.
  • the right mounting member 24 is bent with a large circular arc along a smooth arrangement line from each of the guide bodies 22 to each of the guide bodies 22' , 22".
  • a bolt through hole 24A is formed in the right mounting member 24 in a position corresponding to the screw hole 6M of each of the guide mounting brackets 6L.
  • a right end part of the rear guide part 22A of each of the guide bodies 22, 22', 22" is fixed to the right mounting member 24 by welding.
  • the hose guide 21 presses the left mounting member 23 to a rear surface side of the front plate 6K and presses the right mounting member 24 to the guide mounting bracket 6L of the revolving frame 6.
  • a bolt 25 is inserted in a bolt through hole 23B1 provided in each of the mounting plates 23B of the left mounting member 23 to be screwed into a screw hole 6K3 of the front plate 6K.
  • the bolt 25 is inserted in the bolt through hole 24A of the right mounting member 24 to be screwed into the screw hole 6M of the guide mounting bracket 6L.
  • the movement space 26 in which the plurality of hydraulic hoses 19 move when the front device 5 becomes in the revolving posture is formed between the front plate 6K and each of the guide bodies 22, 22', 22".
  • the movement space 26 is in a range surrounded by the right vertical plate 6C and the front plate 6K in the revolving frame 6, and each of the guide bodies 22, 22', 22" of the hose guide 21.
  • the movement space 26 forms a space in which the loosing part 20 of each of the hydraulic hoses 19 can move, and can loose each of the hydraulic hoses 19 while limiting the movement of each of the hydraulic hoses 19 to the rear side and the left side.
  • the center joint 27 is provided on the lower traveling structure 2-side to be positioned in a revolving center O of the upper revolving structure 4.
  • the center joint 27 causes pressurized oil to flow between the lower traveling structure 2 and the upper revolving structure 4.
  • an exterior cover 28 is positioned between the counterweight 8 and the cab 12 to cover the mounting equipment devices including the engine 9, the hydraulic pump 10 and the heat exchanger 11.
  • the hydraulic excavator 1 has the configuration as described above, and next, an explanation will be made of an operation thereof.
  • An operator gets in the cab 12 and operates the control lever/pedal for traveling (not shown), making it possible to cause the lower traveling structure 2 to travel. Meanwhile, when the operator operates the left and right control levers for front control (not shown), it is possible to perform the revolving operation of the upper revolving structure 4 and the excavating operation of earth and sand by the front device 5.
  • the upper revolving structure 4 of the hydraulic excavator 1 can revolve centering on the revolving center O within a range determined in advance to the vehicle width dimension W of the lower traveling structure 2. That is, as shown in Fig.3 , in the upper revolving structure 4, the virtual circle C by the revolving radius R can be set to be within 130% of the vehicle width dimension W of the lower traveling structure 2 at the maximum by disposing the counterweight 8 close to the revolving center O. Accordingly, the hydraulic excavator 1 can operate/revolve the upper revolving structure 4 and the front device 5 in a small range by setting the front device 5 to the revolving posture as shown in Fig. 1 and Fig. 2 . Thereby, the hydraulic excavator 1 can smoothly perform the excavating operation using the front device 5 without interfering with obstacles in the periphery even in a narrow working site of an urban area or the like.
  • each of the hydraulic hoses 19 connecting each of the hydraulic lines 5G in the front device 5 and the control valve group 17 is set to the length dimension having an allowance in consideration of the excavating posture such that a load does not act in a tension direction at the time of falling down the boom 5A in the front device 5 to the front side to excavate the ground. Accordingly, following the revolving posture of largely tilting the front device 5 to the backward side by causing the boom 5A to rise up, the loosing part 20 is formed in each of the hydraulic hoses 19 between the foot part 5A1 of the boom 5A and the hose through opening 18 of the revolving frame 6. The loosing part 20 possibly makes contact with (interferes with) the revolving motor 16 disposed in the periphery and the hydraulic hoses (not shown) connected to the revolving motor 16 and the center joint 27.
  • the revolving frame 6 is configured by including the bottom plate 6A mounted to the revolving device 3, the left and right vertical plates 6B, 6C that are provided on the bottom plate 6A to rise up and extend in the front-rear direction and be spaced in the left-right direction, and the front plate 6K that is positioned in the front side of each of the left and right vertical plates 6B, 6C to block a space between the left and right vertical plates 6B, 6C.
  • the hose guide 21 is provided on the rear surface side of the front plate 6K in the revolving frame 6, and suppresses each of the hydraulic hoses 19 from being in contact with the revolving motor 16 due to the flexing of each of the hydraulic hoses 19 connecting the control valve group 17 and each of the hydraulic lines 5G in the front device 5 at the time of setting the front device 5 to the revolving posture by largely tilting the boom 5A in the front device 5 to the backward side.
  • the hose guide 21 can limit the movement range of the loosing part 20 by ensuring (partitioning) the movement space 26 of each of the hydraulic hoses 19.
  • the interference between the loosing part 20 of each of the hydraulic hoses 19 and the equipment devices including the revolving motor 16 can be prevented.
  • the hose guide 21 is disposed in the state having the movement space 26, in which the plurality of hydraulic hoses 19 can move, between the front plate 6K of the revolving frame 6 and the hose guide 21 when the front device 5 becomes in the revolving posture. That is, the hose guide 21 is configured by the plurality of guide bodies 22, 22', 22" that extend in the left-right direction and are provided to line up in the upper-lower direction, and the left mounting member 23 and the right mounting member 24 that extend in the upper-lower direction and are provided in both end parts of each of the guide bodies 22, 22', 22" in the length direction for connecting each of the guide bodies 22, 22', 22" to be mounted to the revolving frame 6.
  • the hose guide 21 can be easily mounted to the revolving frame 6 through the left and right mounting members 23, 24. In this mounting state, the movement range of the loosing part 20 in each of the hydraulic hoses 19 can be limited by the movement space 26.
  • each of the hydraulic hoses 19 which is in the inside of the hose guide 21 can be visually seen through a clearance between the respective guide bodies 22, 22', 22" to easily inspect each of the hydraulic hoses 19.
  • the front plate 6K of the revolving frame 6 is configured by including the rising part 6K1 rising from the bottom plate 6A, and the inclined part 6K2 extending to the oblique upward side toward the rear side from the upper part of the rising part 6K1.
  • each of the guide bodies 22', 22" arranged in the downward side is provided to line up in the upper-lower direction along the rising part 6K1
  • each of the guide bodies 22 arranged from the intermediate part in the upper-lower direction to the upward side is provided to line up in the oblique direction along the inclined part 6K2.
  • each of the guide bodies 22, 22', 22" can be smoothly disposed along the front plate 6K, and each of the guide bodies 22, 22', 22" can smoothly guide each of the hydraulic hoses 19.
  • hose guide 21 is configured by each of the guide bodies 22, 22', 22" composed of the round bar, and the left and right mounting members 23, 24 for mounting each of the guide bodies 22, 22', 22" to the revolving frame 6-side, as an example.
  • a hose guide may be formed as a boxy body by bending or fixing a plate member.
  • each guide body may be formed by an angular bar member with a cross-sectional shape of a triangular shape, a rectangular shape or the like.
  • the embodiment is explained by taking the hydraulic excavator 1 of the cab specification provided with the boxy cab 12 as an example.
  • the present invention is not limited thereto, but the present invention may be applied to a hydraulic excavator 1 of a canopy specification in which a canopy covering an upward side and a right lateral side of an operator's seat is provided as a housing.
  • the embodiment is explained by taking a hydraulic excavator 1 of a crawler type as an example.
  • the present invention is not limited thereto, but may be applied to, for example, a hydraulic excavator of a wheel type.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Jib Cranes (AREA)
EP18761799.8A 2017-03-01 2018-02-28 Hydraulic shovel Active EP3530816B1 (en)

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JP6706213B2 (ja) 2020-06-03
CN110226009B (zh) 2021-07-09
CN110226009A (zh) 2019-09-10

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