WO2022209339A1 - 建設機械 - Google Patents
建設機械 Download PDFInfo
- Publication number
- WO2022209339A1 WO2022209339A1 PCT/JP2022/005331 JP2022005331W WO2022209339A1 WO 2022209339 A1 WO2022209339 A1 WO 2022209339A1 JP 2022005331 W JP2022005331 W JP 2022005331W WO 2022209339 A1 WO2022209339 A1 WO 2022209339A1
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- WIPO (PCT)
- Prior art keywords
- cylinder
- arm
- work
- guard
- link
- Prior art date
Links
- 238000010276 construction Methods 0.000 title claims description 12
- 230000008602 contraction Effects 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 description 7
- 239000012634 fragment Substances 0.000 description 6
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 210000000078 claw Anatomy 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- E02F9/24—Safety devices, e.g. for preventing overload
-
- 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
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
- E02F3/965—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements
-
- 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
- E02F3/30—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
- E02F3/302—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 an additional link
-
- 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
- E02F3/32—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 working downwardly and towards the machine, e.g. with backhoes
-
- 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
- E02F3/382—Connections to the frame; Supports for booms or arms
-
- 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
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
-
- 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
- E02F9/2271—Actuators and supports therefor and protection therefor
Definitions
- the present disclosure relates to a construction machine equipped with a working device operated by a hydraulic cylinder.
- Hydraulic excavators which represent construction machinery, have a body composed of a self-propelled lower traveling body and an upper rotating body mounted on the lower traveling body so that it can swivel.
- a working device is provided on the front side of the upper rotating body.
- a working device for demolition work usually includes a boom whose base end is rotatably connected to a revolving frame of an upper revolving structure, an arm rotatably connected to the tip of the boom, and a rotatable arm to the tip of the arm. and a work tool (work attachment) such as a crusher that is operably connected.
- a boom cylinder for raising and lowering the boom is provided between the revolving frame and the boom, and an arm cylinder for rotating the arm on the tip side of the boom is provided between the boom and the arm.
- a work tool cylinder attachment cylinder
- a work tool cylinder attachment cylinder
- a work tool cylinder is provided between the arm and the work tool to rotate the work tool at the tip side of the arm, and the work tool cylinder is normally arranged on the upper surface side of the arm.
- the range of movement of the work tools relative to the arm is narrow, and work is often performed at a position lower than the upper surface of the arm. Therefore, the height of the work implement cylinder arranged on the upper surface side of the arm is often the maximum, and there is a high risk that the work implement cylinder will come into contact with the ceiling, reinforcing bars, etc. of the building to be demolished.
- the rod-side guard slides against the tube-side guard guide due to the expansion and contraction of the work tool cylinder. For this reason, the sliding portion between the rod-side guard and the tube-side guard catches fragments of reinforcing bars, concrete, etc., generated by demolition work of the building, which hinders the smooth sliding movement of the rod-side guard.
- two guards, a tube-side guard and a rod-side guard, are required, and fixtures such as bolts and pins are required for attaching these guards to the tube and rod. For this reason, the cylinder guard according to Patent Document 1 has a problem that the number of parts and the number of man-hours for mounting are increased, and the manufacturing cost of the cylinder guard is increased.
- An object of the present invention is to provide a construction machine capable of protecting a work tool cylinder.
- the present invention comprises a self-propellable vehicle body and a working device provided on the vehicle body, wherein the working device comprises a boom rotatably attached to the vehicle body and a rotatable tip of the boom. a working tool rotatably attached to the tip of the arm; a working tool cylinder having one end attached to the arm for rotating the working tool;
- the work implement cylinder has the arm folded toward the boom.
- the link is arranged on the lower surface side of the arm that sometimes faces the boom, rotates and displaces in synchronization with the expansion and contraction of the work implement cylinder, and is interposed between the work implement and the work implement cylinder.
- a cylinder guard is provided.
- the cylinder guard rotates and displaces in synchronization with the expansion and contraction of the work implement cylinder, and intervenes between the work implement and the work implement cylinder while moving integrally with the link.
- the cylinder guard can prevent debris scattered from the building from colliding with the work tool cylinder, thereby protecting the work tool cylinder. .
- FIG. 1 is a left side view showing a hydraulic excavator for demolition work to which an embodiment of the present invention is applied;
- FIG. It is a left side showing an arm, a link, and a cylinder guard when the work implement cylinder is in a contracted state.
- Fig. 10 is a left side view showing the arm, link and cylinder guard when the work implement cylinder is between the retracted and extended states; It is a left side view showing an arm, a link, and a cylinder guard when the work implement cylinder is in an extended state.
- FIG. 3 is a front view of an arm, a link, a work tool cylinder, and a cylinder guard as viewed in the direction of arrows VV in FIG.
- FIG. 2 It is a perspective view which shows a cylinder guard alone.
- Fig. 2 is a left side view showing a state in which the hydraulic excavator performs demolition work of a building;
- Fig. 10 is a left side view showing the working device that performs dismantling work with the working tool cylinder in a contracted state;
- Fig. 10 is a left side view showing the working device that performs the demolition work with the working tool cylinder between the contracted state and the extended state;
- Fig. 10 is a left side view showing the working device that performs dismantling work with the working tool cylinder in an extended state;
- the traveling direction of the hydraulic excavator is defined as the front-rear direction
- the direction perpendicular to the traveling direction is defined as the left-right direction.
- a hydraulic excavator 1 for demolition work includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 rotatably mounted on the lower traveling body 2, and an upper revolving body 3 provided on the front side of the upper revolving body 3. and a working device 8 .
- the lower traveling body 2 and the upper revolving body 3 constitute the vehicle body of the hydraulic excavator 1 .
- the hydraulic excavator 1 is suitably used for demolition work of demolishing a structure having a large height above the ground, such as a high-rise building.
- the upper revolving body 3 includes a revolving frame 4 serving as a base, a counterweight 5 provided on the rear end side of the revolving frame 4 , a cab 6 disposed on the front left side of the revolving frame 4 , and a front side of the counterweight 5 . It is configured including a building cover 7 arranged in.
- the cab 6 defines an operator's cab for manipulating the hydraulic excavator 1. Inside the cab 6 are a travel lever/pedal device for controlling the travel motion of the lower travel body 2, the revolving motion of the upper revolving body 3, An operating lever device (none of which is shown) is provided for controlling the operation of the working device 8 .
- Mounted equipment such as an engine, a hydraulic pump, and a heat exchanger are housed inside the building cover 7 .
- a support bracket (not shown) rising in a mountain shape from the bottom plate is integrally provided on the front end side of the revolving frame 4 .
- the support bracket rotatably supports the base end side of a lower boom 9, which will be described later, and also rotatably supports the base end side of the boom cylinder 19. As shown in FIG.
- a multi-boom work device 8 is attached to the front end of the revolving frame 4 that constitutes the upper revolving body 3 .
- the work device 8 includes a lower boom 9 and an upper boom 10 forming booms, a middle arm 11 and an arm 12 forming arms, a work implement 13 and a link 16 .
- the base end side of the lower boom 9 is rotatably attached to the front end side (the support bracket) of the revolving frame 4 .
- a proximal end of an upper boom 10 is fixed to the tip of the lower boom 9 using fasteners such as bolts.
- a proximal end of a middle arm 11 is rotatably connected to the tip of the upper boom 10 using a pin 11A.
- the middle arm 11 is provided with a first bracket 11B and a second bracket 11C adjacent to each other.
- the proximal end of the arm 12 is rotatably connected to the distal end of the middle arm 11 using a pin 11D.
- the arm 12 is formed as a rectangular tubular body with a square cross section surrounded by an upper surface 12A, a lower surface 12B, and left and right side surfaces 12C. As shown in FIG. 10, the lower surface 12B of the arm 12 faces the upper boom 10 when the arm 12 is folded toward the upper boom 10 side.
- a first bracket 12D and a second bracket 12E are provided adjacent to each other on the lower surface 12B of the arm 12 .
- a joint device 14 of a work tool 13 is rotatably connected to the tip of the arm 12 using a pin 12F.
- the working tool 13 is rotatably attached to the tip of the arm 12.
- the joint device 14 and the crusher 15 constitute the working tool 13 .
- the joint device 14 is a device for replacing and attaching various work attachments such as a bucket, a grapple, and a crusher 15 to the tip of the arm 12 according to the work content of the hydraulic excavator 1 .
- a crusher 15 for demolition work is attached to the joint device 14
- the joint device 14 and the crusher 15 constitute a working tool 13 .
- the joint device 14 has a base member 14A, a fixed hook 14B fixed to the base member 14A, and a movable hook 14C.
- the movable hook 14C is movably provided on the base member 14A and moves toward or away from the fixed hook 14B.
- a crusher 15 for demolition work is rotatably attached to the tip of the arm 12 via a joint device 14 .
- Two pins 15A are provided on the base end side of the crusher 15, and these two pins 15A are engaged with the fixed hook 14B and the movable hook 14C of the joint device 14, whereby the crusher 15 is connected to the joint device 14.
- the crusher 15 has left and right claw members 15B that are opened and closed by a hydraulic cylinder.
- the left and right claw members 15B crush buildings and the like, and in order to prevent the fragments generated by the crushing from falling, they are placed in a stable place around them. put in
- the link 16 is provided on the tip side of the arm 12 and connects between the work implement cylinder 22 and the work implement 13, which will be described later. As shown in FIGS. 2 to 5, the link 16 is composed of a first link 17 and a second link 18, and rotates in synchronism with the expansion and contraction of the work tool cylinder 22, so that the arm 12 is moved. The work tool 13 is rotated.
- the first link 17 consists of a pair of link plates that extend linearly, and face each other in the left-right direction with the arm 12 interposed therebetween.
- An intermediate portion in the length direction of the first link 17 is rotatably connected via a pin 17A to a position adjacent to a connecting portion (pin 12F) with the joint device 14 on the distal end side of the arm 12.
- One end 17B in the length direction of the first link 17 is arranged on the lower surface 12B side of the arm 12 and connected to the rod 22B of the work tool cylinder 22 .
- the other end 17 ⁇ /b>C of the first link 17 in the length direction is arranged on the side of the upper surface 12 ⁇ /b>A of the arm 12 and connected to the second link 18 .
- Two seat screws (not shown) are provided on the one end 17B sides of the left and right first links 17, respectively.
- the second link 18 is provided between the other end 17C of the first link 17 and the joint device 14 to connect the two.
- One longitudinal end of the second link 18 is rotatably connected to the other end 17C of the first link 17 via a pin 18A.
- the other end in the length direction of the second link 18 is rotatably connected to a position of the base member 14A of the joint device 14 separated from the pin 12F using a pin 18B.
- a pair of (two) left and right boom cylinders 19 are provided between the revolving frame 4 and the lower boom 9 (only the left side is shown).
- the bottom side of the boom cylinder 19 is rotatably attached to the support bracket of the revolving frame 4 .
- the rod side of the boom cylinder 19 is rotatably connected to the tip side of the lower boom 9 using a pin 19A.
- a pair of (two) left and right middle arm cylinders 20 are provided between the upper boom 10 and the middle arm 11 (only the left side is shown).
- the bottom side of the middle arm cylinder 20 is rotatably connected to the upper boom 10 using a pin 20A, and the rod side of the middle arm cylinder 20 is rotatable to the first bracket 11B of the middle arm 11 using a pin 20B.
- An arm cylinder 21 is provided between the middle arm 11 and the arm 12 .
- the bottom side of the arm cylinder 21 is rotatably connected to the second bracket 11C of the middle arm 11 using a pin 21A, and the rod side of the arm cylinder 21 is connected to the first bracket 12D of the arm 12 using a pin 21B. It is rotatably connected.
- the work implement cylinder 22 is arranged on the lower surface 12B side of the arm 12 and provided between the arm 12 and the link 16 .
- the work implement cylinder 22 has a tube 22A, a piston (not shown) slidably provided in the tube 22A, and a rod 22B having a proximal end attached to the piston and a distal end protruding from the tube 22A.
- One end (tube 22A) in the length direction of the work implement cylinder 22 is rotatably connected to the second bracket 12E of the arm 12 using a pin 22C.
- the other end (rod 22B) of the working implement cylinder 22 in the length direction is rotatably connected to one end 17B of the first link 17 using a pin 22D.
- the first link 17 rotates around the connecting portion (pin 17A) with the arm 12 as the work tool cylinder 22 expands and contracts, and the first link 17 moves through the second link 18. is transmitted to the joint device 14.
- the work tool 13 composed of the joint device 14 and the crusher 15 rotates around the connecting portion (pin 12F) with the arm 12 .
- the work implement cylinder 22 expands and contracts between the contracted state and the extended state, so that the crusher 15 is rotated and displaced within the range shown in FIGS. conduct.
- the work implement cylinder 22 is arranged on the lower surface 12B side of the arm 12, when the work implement 13 is rotated upward around the pin 12F, the work implement cylinder 22 is extended. On the other hand, when the work implement 13 is rotated downward, the work implement cylinder 22 is retracted. Therefore, compared to the case where the work tool cylinder 22 is arranged on the upper surface 12A side of the arm 12, for example, when lifting waste materials such as reinforcing bars and concrete produced by demolition work using the work tool 13, the work tool The cylinder 22 is extended and can generate a large force.
- FIG. 1 The cylinder guard 23 used in this embodiment will be described with reference to FIGS. 2 to 6.
- FIG. 1 The cylinder guard 23 is fixed to a pair of first links 17 forming the link 16 .
- the cylinder guard 23 is provided between the work implement 13 and the work implement cylinder 22 when the work implement cylinder 22 expands and contracts between the retracted state (the state shown in FIG. 2) and the extended state (the state shown in FIG. 4). It intervenes and protects the work implement cylinder 22 .
- the cylinder guard 23 is formed as a rectangular plate using a steel plate material or the like, and has a mounting plate portion 23A attached to the pair of first links 17 and a mounting plate portion 23A which is inclined with respect to the mounting plate portion 23A. and a guard plate portion 23B integrally provided in a state.
- the guard plate portion 23B is set at an angle of inclination with respect to the mounting plate portion 23A so as to come closest to the work implement cylinder 22 when the work implement cylinder 22 is contracted as shown in FIG.
- the cylinder guard 23 has a length dimension that covers the entire length of the contracted work implement cylinder 22 .
- the width of the cylinder guard 23 is set to be slightly larger than the interval between the pair of first links 17, and bent portions 23C are provided at both ends of the cylinder guard 23 in the width direction.
- the bent portion 23C is bent at right angles to the mounting plate portion 23A and the guard plate portion 23B, thereby increasing the strength of the cylinder guard 23 as a whole.
- a mounting plate portion 23A of the cylinder guard 23 is provided with a plurality of (for example, four) bolt insertion holes 23D.
- the bolt insertion holes 23 ⁇ /b>D correspond to seat screws (not shown) provided two each in the pair of first links 17 constituting the link 16 . Therefore, the cylinder guard 23 is fixed to the first links 17 by screwing the bolts 24 inserted through the bolt insertion holes 23 ⁇ /b>D to the seat screws of the pair of first links 17 .
- the cylinder guard 23 has one lengthwise end 23E fixed to the first link 17 and the other lengthwise end 23F serving as a free end.
- the angle ⁇ formed between the guard plate portion 23B of the cylinder guard 23 and the first link 17 is always constant regardless of the expansion and contraction of the work implement cylinder 22 .
- semi-circular A shaped notch 23G is formed.
- the notch 23G prevents both ends of the pin 22D from interfering with the bent portion 23C when the cylinder guard 23 is attached to the first link 17. As shown in FIG.
- the hydraulic excavator 1 has the construction described above. For example, as shown in FIG. . Then, the boom cylinder 19, the middle arm cylinder 20, and the arm cylinder 21 of the work device 8 are extended respectively, and the lower boom 9, the upper boom 10, the middle arm 11, and the arm 12 are erected linearly. As a result, the work tool 13 is placed at a high place, and the hydraulic excavator 1 dismantles the building 100 by using the crusher 15, and disposes of waste materials such as reinforcing bars and concrete on the carrier (not shown) of the transportation vehicle. .
- the working tool cylinder 22 is set between the contracted state and the extended state. Then, the building 100 is dismantled by the crusher 15 while the working tool 13 is in a posture facing the building 100 .
- the arm 12 extended in the horizontal direction as described above it is not common to perform dismantling work with the work tool 13 rotated upward about the pin 12F. In this state, the cylinder guard 23 faces the building 100 to protect the work tool cylinder 22 from fragments such as reinforcing bars and concrete scattered from the building 100 .
- the working tool cylinder 22 is separated from the building 100 and the building 100 and the working tool are separated from each other.
- Arm 12 is arranged between cylinder 22 .
- a cylinder guard 23 covers the tip side of the rod 22B of the work implement cylinder 22 protruding from the tip of the arm 12 .
- most of the tube 22A and the rod 22B of the work tool cylinder 22 can be protected by the arm 12 against fragments of reinforcing bars, concrete, etc., scattered from the building 100.
- the tip side of the rod 22B of the work tool cylinder 22 can be protected by the cylinder guard 23. As shown in FIG.
- the cylinder guard 23 always intervenes between the work implement 13 and the work implement cylinder 22 when the work implement cylinder 22 expands and contracts between the contracted state and the extended state.
- the work implement cylinder 22 can be protected.
- one end 23E side of the cylinder guard 23 is fixed to the first link 17 of the link 16 using a bolt 24, and the work implement cylinder 22 is protected while rotating integrally with the first link 17.
- the cylinder guard 23 for example, compared to a cylinder guard in which two members, a rod-side guard and a tube-side guard, are assembled so as to be slidably displaceable, as in the prior art, can prevent debris from getting caught in the sliding portion. There is no malfunction caused by Therefore, the cylinder guard 23 can reliably protect the work implement cylinder 22 over a long period of time.
- the cylinder guard 23 is made of a single component and can be easily attached to the first link 17 using the bolts 24 . Therefore, the number of parts and the number of man-hours required for mounting can be reduced, for example, compared to a cylinder guard consisting of two members, a rod-side guard and a tube-side guard, as in the prior art. Therefore, the cylinder guard 23 can also contribute to a reduction in manufacturing costs.
- the work device 8 includes a lower boom 9 and an upper boom 10 rotatably attached to the upper revolving structure 3, and a middle arm 11 rotatably attached to the tip of the upper boom 10. and an arm 12, a work tool 13 rotatably attached to the tip of the arm 12, a work tool cylinder 22 having one end attached to the arm 12 for rotating the work tool 13, and the tip side of the arm 12. and a link 16 that connects the other end of the work implement cylinder 22 and the work implement 13, and the work implement cylinder 22 is connected to the upper boom when the arm 12 is folded toward the upper boom 10 side.
- the link 16 has a cylinder disposed on the lower surface 12B side of the arm 12 that faces the arm 10 and is rotationally displaced in synchronization with the expansion and contraction of the work implement cylinder 22 and interposed between the work implement 13 and the work implement cylinder 22.
- a guard 23 is provided.
- the cylinder guard 23 rotates and displaces in synchronism with the expansion and contraction of the work implement cylinder 22 , thereby interposing between the work implement 13 and the work implement cylinder 22 while moving integrally with the link 16 . do.
- the cylinder guard 23 prevents debris scattered from the building from colliding with the work tool cylinder 22, thereby protecting the work tool cylinder 22. can do.
- the cylinder guard 23 has a length dimension that covers the entire length of the work tool cylinder 22 in the contracted state, and is formed of a plate having bent portions 23C at both ends in the width direction. It is fixed to the 1 link 17 while maintaining a constant angle. This configuration eliminates the need to provide a sliding portion between the cylinder guard 23 and the first link 17 . Therefore, the broken pieces or the like generated by the dismantling work do not get caught in the sliding portion, and malfunction of the cylinder guard 23 can be avoided. Moreover, the strength of the entire cylinder guard 23 can be increased by the bent portion 23C.
- one longitudinal end 23E of the cylinder guard 23 is fixed to the first link 17, and the other longitudinal end 23F of the cylinder guard 23 is a free end. According to this configuration, the cylinder guard 23 can protect the work implement cylinder 22 while being rotationally displaced together with the first link 17 according to the expansion and contraction of the work implement cylinder 22 .
- the crusher 15 is attached to the tip of the arm 12 via the joint device 14 .
- the present invention is not limited to this, and a configuration in which the crusher 15 is directly attached to the tip of the arm 12 may be adopted.
- the present invention is not limited to this, and the configuration may be such that the arm 12 is directly attached to the tip of the upper boom 10 .
- a crusher 15 for demolition work is attached to the tip of the arm 12 via a joint device 14.
- the present invention is not limited to this, and can be widely applied to hydraulic excavators equipped with other work implements such as buckets, grapples, and lifting magnets.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Shovels (AREA)
Abstract
Description
2 下部走行体(車体)
3 上部旋回体(車体)
8 作業装置
9 ロアブーム(ブーム)
10 アッパブーム(ブーム)
11 ミドルアーム(アーム)
12 アーム
12B 下面
13 作業具
16 リンク
17 第1リンク
18 第2リンク
22 作業具シリンダ
23 シリンダガード
23C 屈曲部
23E 一端
23F 他端
Claims (3)
- 自走可能な車体と、前記車体に設けられた作業装置とからなり、
前記作業装置は、
前記車体に回動可能に取付けられたブームと、
前記ブームの先端に回動可能に取付けられたアームと、
前記アームの先端に回動可能に取付けられた作業具と、
前記作業具を回動させるために前記アームに一端が取付けられた作業具シリンダと、
前記アームの先端側に回動可能に取付けられ、前記作業具シリンダの他端と前記作業具との間を連結するリンクとを備えてなる建設機械において、
前記作業具シリンダは、前記アームを前記ブーム側に折畳んだときに前記ブームと対面する前記アームの下面側に配置され、
前記リンクには、前記作業具シリンダの伸縮動作に同期して回動変位し、前記作業具と前記作業具シリンダとの間に介在するシリンダガードが設けられていることを特徴とする建設機械。 - 前記シリンダガードは、縮小状態となった前記作業具シリンダを全長に亘って覆う長さ寸法を有し、幅方向の両端に屈曲部が設けられた板体により形成され、前記リンクに対し一定の角度を保った状態で固定されていることを特徴とする請求項1に記載の建設機械。
- 前シリンダガードは、長さ方向の一端側が前記リンクに固定され、前記シリンダガードの長さ方向の他端は自由端となっていることを特徴とする請求項1または2に記載の建設機械。
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US18/025,458 US20230332372A1 (en) | 2021-03-31 | 2022-02-10 | Construction machine |
EP22779568.9A EP4187019A1 (en) | 2021-03-31 | 2022-02-10 | Construction machine |
KR1020237008132A KR20230047176A (ko) | 2021-03-31 | 2022-02-10 | 건설 기계 |
JP2023510599A JP7339469B2 (ja) | 2021-03-31 | 2022-02-10 | 建設機械 |
CN202280006325.3A CN116113739A (zh) | 2021-03-31 | 2022-02-10 | 工程机械 |
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JP2021061496 | 2021-03-31 | ||
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US (1) | US20230332372A1 (ja) |
EP (1) | EP4187019A1 (ja) |
JP (1) | JP7339469B2 (ja) |
KR (1) | KR20230047176A (ja) |
CN (1) | CN116113739A (ja) |
WO (1) | WO2022209339A1 (ja) |
Citations (7)
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JPS54180372U (ja) * | 1978-06-09 | 1979-12-20 | ||
JPS645780B2 (ja) | 1981-09-16 | 1989-01-31 | Nippon Telegraph & Telephone | |
JP3000513U (ja) * | 1994-01-28 | 1994-08-09 | 古河機械金属株式会社 | 圧砕機用油圧シリンダのピストンロッド保護装置 |
JP2004183421A (ja) * | 2002-12-06 | 2004-07-02 | Yanmar Co Ltd | 移動式圧砕機 |
JP2004190330A (ja) * | 2002-12-11 | 2004-07-08 | Yanmar Co Ltd | 移動式作業車 |
KR20110059979A (ko) * | 2009-11-30 | 2011-06-08 | 대모 엔지니어링 주식회사 | 머트리얼 핸들러 작동용 암실린더의 피스톤로드 보호커버 |
JP2013104275A (ja) * | 2011-11-16 | 2013-05-30 | Sumitomo (Shi) Construction Machinery Co Ltd | 高所解体機 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014015780A (ja) | 2012-07-10 | 2014-01-30 | Hitachi Constr Mach Co Ltd | 油圧シリンダのガード装置 |
-
2022
- 2022-02-10 JP JP2023510599A patent/JP7339469B2/ja active Active
- 2022-02-10 CN CN202280006325.3A patent/CN116113739A/zh active Pending
- 2022-02-10 WO PCT/JP2022/005331 patent/WO2022209339A1/ja unknown
- 2022-02-10 KR KR1020237008132A patent/KR20230047176A/ko unknown
- 2022-02-10 US US18/025,458 patent/US20230332372A1/en active Pending
- 2022-02-10 EP EP22779568.9A patent/EP4187019A1/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54180372U (ja) * | 1978-06-09 | 1979-12-20 | ||
JPS645780B2 (ja) | 1981-09-16 | 1989-01-31 | Nippon Telegraph & Telephone | |
JP3000513U (ja) * | 1994-01-28 | 1994-08-09 | 古河機械金属株式会社 | 圧砕機用油圧シリンダのピストンロッド保護装置 |
JP2004183421A (ja) * | 2002-12-06 | 2004-07-02 | Yanmar Co Ltd | 移動式圧砕機 |
JP2004190330A (ja) * | 2002-12-11 | 2004-07-08 | Yanmar Co Ltd | 移動式作業車 |
KR20110059979A (ko) * | 2009-11-30 | 2011-06-08 | 대모 엔지니어링 주식회사 | 머트리얼 핸들러 작동용 암실린더의 피스톤로드 보호커버 |
JP2013104275A (ja) * | 2011-11-16 | 2013-05-30 | Sumitomo (Shi) Construction Machinery Co Ltd | 高所解体機 |
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EP4187019A1 (en) | 2023-05-31 |
US20230332372A1 (en) | 2023-10-19 |
KR20230047176A (ko) | 2023-04-06 |
JP7339469B2 (ja) | 2023-09-05 |
CN116113739A (zh) | 2023-05-12 |
JPWO2022209339A1 (ja) | 2022-10-06 |
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