WO2017138249A1 - Corps rotatif supérieur pour engin de chantier - Google Patents

Corps rotatif supérieur pour engin de chantier Download PDF

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Publication number
WO2017138249A1
WO2017138249A1 PCT/JP2016/087334 JP2016087334W WO2017138249A1 WO 2017138249 A1 WO2017138249 A1 WO 2017138249A1 JP 2016087334 W JP2016087334 W JP 2016087334W WO 2017138249 A1 WO2017138249 A1 WO 2017138249A1
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WO
WIPO (PCT)
Prior art keywords
cab
guard
opening
duct
sound
Prior art date
Application number
PCT/JP2016/087334
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English (en)
Japanese (ja)
Inventor
京子 増田
伸一 木下
真史 入江
恵理 渡辺
康正 木村
Original Assignee
株式会社神戸製鋼所
コベルコ建機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社神戸製鋼所, コベルコ建機株式会社 filed Critical 株式会社神戸製鋼所
Priority to EP16889950.8A priority Critical patent/EP3415459B1/fr
Publication of WO2017138249A1 publication Critical patent/WO2017138249A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • 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
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • 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
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
    • E02F9/0866—Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment

Definitions

  • the present invention relates to an upper swing body of a construction machine.
  • Patent Documents 1 and 2 describe an upper rotating body of a conventional construction machine.
  • a sound absorbing material is provided on the inner surface of the engine chamber on the rear side of the cab.
  • a sound absorbing material is provided in a portion where the boom and the cab face each other. Noise suppression in the cab is achieved by these sound absorbing materials.
  • an object of the present invention is to provide an upper rotating body of a construction machine that can suppress noise in the cab.
  • the upper turning body of the construction machine of the present invention includes a center section, a noise source accommodation guard, a cab, and a propagation part.
  • the center section is disposed to face each other in the left-right direction, has a plurality of side plates extending in the front-rear direction, and an internal space is formed between the plurality of side plates.
  • the noise source accommodation guard is disposed on the right side or the left side of the center section and accommodates the noise source therein.
  • the cab is disposed on the front side or the rear side of the noise source accommodation guard.
  • the propagation unit propagates the sound generated by the noise source from the inside of the noise source accommodation guard to the internal space of the center section.
  • the propagation part includes a first discharge opening and a first receiving opening.
  • the first emission opening is a first emission opening opened in the noise source accommodation guard, and allows the sound to be emitted from the inside of the noise source accommodation guard through the first emission opening.
  • the first receiving opening is a first receiving opening opened in the center section, and the sound emitted through the first discharge opening is received in the internal space through the first receiving opening. Is acceptable.
  • FIG. 3 is a cross-sectional view of the upper swing body 1A of FIG. It is sectional drawing which looked at the upper turning body 1B which concerns on 1st deformation
  • FIG. 7 is a cross-sectional view taken along arrow F7-F7 of the upper swing body 1D of FIG. It is a cross-sectional perspective view of upper revolving unit 1D of FIG. It is sectional drawing which looked at the upper turning body 1E which concerns on 4th modification embodiment of this invention from the front side X1. It is sectional drawing which looked at the upper turning body 1F which concerns on 5th modification embodiment of this invention from the front side X1. It is sectional drawing which looked at the upper turning body 201A which concerns on 2nd Embodiment of this invention from the top. It is a cross-sectional perspective view of the upper swing body 201A of FIG.
  • FIG. 20 is a perspective view showing a left duct 380 of the upper swing body 401C shown in FIG. It is sectional drawing which looked at upper revolving body 401D concerning the 10th modification of the present invention from the top. It is sectional drawing which looked at the upper turning body 501A which concerns on 5th Embodiment of this invention from the top. It is sectional drawing which looked at the upper turning body 501B which concerns on 11th deformation
  • the upper swing body 1A is a component of the construction machine.
  • the construction machine provided with the upper swing body 1A is, for example, a crane, and more specifically a mobile crane. In other embodiments, the construction machine may be an excavator (eg, a hydraulic excavator).
  • the upper swing body 1A is mounted on the lower travel body so as to be turnable with respect to the lower travel body (not shown).
  • the lower traveling body is, for example, a crawler type and may be a wheel type.
  • the upper swing body 1A includes a center section 10, a cab proximity guard 20 (noise source accommodation guard), a cab 25, an anti-cab side guard 30, and a duct structure 40 (propagation unit).
  • the center section 10 (swivel frame) is attached to the lower traveling body and provided at the center of the upper swing body 1A.
  • the cab proximity guard 20 and the anti-cab side guard 30 are attached (fixed) to the center section 10 so as to sandwich the center section 10.
  • a cab 25 is attached to the center section 10.
  • a plate-like base portion 100 is provided on the upper swing body 1A, and the center section 10, the cab proximity guard 20, the anti-cab side guard 30 and the cab 25 are fixed to the base portion 100, respectively. May be.
  • directions such as “front and rear”, “left and right”, and “up and down” are shown for explanation of the upper swing body according to each embodiment.
  • the center section 10 is arranged so that the longitudinal direction of the center section 10 is along the front-rear direction, and further, the width direction of the center section 10 is along the left-right direction.
  • the cab proximity guard 20 is disposed on the rear side of the cab 25 in FIG. 1, but the cab proximity guard 20 may be disposed on the front side of the cab 25.
  • the cab proximity guard 20 is disposed on the right side of the center section 10, the cab proximity guard 20 may be disposed on the left side of the center section 10.
  • Boom B is attached to the center section 10.
  • the boom B is a member for hanging a suspended load via a wire rope, and can be raised and lowered with respect to the upper swing body 1A.
  • the base end portion of the boom B is attached to the front end portion of the center section 10.
  • the boom B is a lattice boom having a lattice structure, for example.
  • a gantry and a winch (each not shown) are attached to the center section 10.
  • the center section 10 includes a bottom plate 11, a plurality of side plates 13, and a connecting member 15 (see FIG. 8).
  • the bottom plate 11 is a plate constituting the bottom portion (lower portion) of the center section 10 and extends along the front-rear direction and the left-right direction.
  • the plurality of side plates 13 are plates that protrude upward from the bottom plate 11, respectively, and extend in the front-rear direction and the up-down direction.
  • the plurality of side plates 13 include two side plates 13.
  • the plurality of side plates 13 may include three or more side plates.
  • the two side plates 13 are arranged to face each other in the left-right direction.
  • the two side plates 13 include a right side plate 13a (cab side plate) and a left side plate 13b (anti-cab side plate).
  • the right side plate 13a is disposed closest to the cab proximity guard 20 side (right side in FIG. 1).
  • the left side plate 13b is disposed closest to the anti-cab side guard 30 side (left side in FIG. 1).
  • an inner region A1 (inner space) of a center section region A described later is formed.
  • the connecting member 15 (see FIG. 8) is a member that connects the two side plates 13 to each other, and extends in the left-right direction.
  • the connecting member 15 has a plate shape, for example, and extends along the vertical direction.
  • the cab proximity guard 20 accommodates one or more noise sources inside.
  • Noise sources include, for example, the engine 21, the fan 22, a hydraulic pump (not shown), a hydraulic motor (not shown), a hydraulic valve (not shown), and the like.
  • the engine 21 is a drive source for the construction machine.
  • the fan 22 generates cooling air and cools, for example, a radiator (not shown).
  • the cab proximity guard 20 is disposed on the right side (outside in the left-right direction) of the center section 10 and is disposed at a position facing the center section 10 in the left-right direction. A predetermined gap is provided in the left-right direction between the cab proximity guard 20 and the right side plate 13a for easy assembly.
  • the cab proximity guard 20 is formed with an air inlet (not shown).
  • the intake port is provided, for example, in a rear portion (for example, a rear end portion) of the cab proximity guard 20.
  • the cab 25 (cab) is arranged on the front side of the cab proximity guard 20.
  • the cab 25 may be disposed on the rear side of the cab proximity guard 20.
  • the cab 25 is disposed so as to face the cab proximity guard 20 in the front-rear direction.
  • a member such as an oil tank (not shown) may be sandwiched between the cab 25 and the cab proximity guard 20.
  • the cab 25 is disposed on the right side of the center section 10.
  • the cab 25 may be arranged on the left side of the center section 10.
  • the anti-cab side guard 30 accommodates equipment (not shown).
  • the anti-cab side guard 30 faces the center section 10 in the left-right direction, and is disposed on the left side of the center section 10. More specifically, the anti-cab side guard 30 is arranged on the opposite side (left side, so-called anti-cab side) to the center section 10 from the side (right side) where the cab proximity guard 20 and the cab 25 are arranged.
  • the device accommodated in the anti-cab side guard 30 is, for example, a hydraulic device.
  • the hydraulic equipment includes, for example, a hydraulic motor for driving a winch (not shown) attached to the center section 10.
  • the hydraulic device may include an engine, a fan, a hydraulic pump, and the like.
  • the duct structure 40 propagates the sound generated by the noise source from the inside of the cab proximity guard 20 to the center section region A of the center section 10.
  • the duct structure 40 is a structure for reducing noise transmitted from the inside of the cab proximity guard 20 to the cab 25.
  • the duct structure 40 radiates the sound (sound wave) inside the cab proximity guard 20 at a position away from the cab 25. Inside the duct structure 40, air can flow and sound can be transmitted.
  • FIG. 1 the end surface of the cut portion is shown for the portion of the duct structure 40 (the same applies to other drawings (except for FIGS. 8, 12, 16, and 20)).
  • the duct structure 40 also has an exhaust duct function. Cooling air generated by the fan 22 flows inside the duct structure 40. The duct structure 40 discharges air (exhaust) inside the cab proximity guard 20 at a position away from the cab proximity guard 20.
  • the upstream side in the propagation direction of the sound transmitted through the duct structure 40 and the upstream side of the cooling air transmitted through the duct structure 40 are the same side (the same applies to the downstream side).
  • the upstream and downstream in the propagation direction of the sound transmitted through the duct structure 40 are simply referred to as “upstream” and “downstream”.
  • the position on the most upstream side of the duct structure 40 is defined as “the inlet of the duct structure 40”
  • the position on the most downstream side of the duct structure 40 is defined as “the outlet of the duct structure 40”.
  • the direction of flow inside the duct structure 40 is defined as “flow direction”.
  • the duct structure 40 substantially communicates the internal space of the cab proximity guard 20 with the inside of the space on the left side of the right side plate 13a. Specifically, the duct structure 40 substantially communicates the internal space of the cab proximity guard 20 and the space in the center section region A (see FIG. 4).
  • “substantially communicating” includes not only that the spaces communicate with each other due to the closed space, but also that the spaces communicate with each other through the substantially closed space as described later in “duct-like structure” (hereinafter referred to as “substantially communicating”). "Is the same). There may be a leaking portion (a portion where sound leaks, such as a small opening) in the middle of the flow path inside the duct structure 40.
  • the duct structure 40 does not have a plate-like side wall, and may have a portion made of a rubber plate or a rubber sheet. Part or all of the duct structure 40 may have a hose shape or a pipe shape.
  • the duct structure 40 includes an opening and a duct (tubular member).
  • the duct structure 40 includes, in order from the upstream side to the downstream side, a cab proximity guard opening 51 (first discharge opening), a right connection duct 55 (guide portion, accommodation guard side connection guide), and a right side plate opening 59 (first Receiving opening) and a center duct 60 (guide portion, center section internal guide).
  • the cab proximity guard opening 51 is an opening formed in the cab proximity guard 20 and is a through-hole penetrating the left side wall of the cab proximity guard 20 along the left-right direction.
  • the cab proximity guard opening 51 is disposed at a position facing the right side plate 13a in the left-right direction.
  • the cab proximity guard opening 51 is an inlet of the duct structure 40.
  • the cab proximity guard opening 51 allows sound to be emitted from the inside of the cab proximity guard 20 through the cab proximity guard opening 51.
  • the cab proximity guard opening 51 is disposed in front of the fan 22 and further disposed in front of the engine 21.
  • the boundary between the cab proximity guard opening 51 and the space inside the cab proximity guard 20 is indicated by a two-dot chain line (the same applies to the other boundaries).
  • the right connection duct 55 (guide part, accommodation guard side connection guide) is a duct communicating with the cab proximity guard opening 51.
  • the right connection duct 55 is disposed between the cab proximity guard 20 and the right side plate 13a.
  • the flow direction in the right connection duct 55 is the left direction.
  • the right connection duct 55 is disposed so as to connect the cab proximity guard opening 51 and the right side plate opening 59, and sound generated by the engine 21 is directed from the cab proximity guard opening 51 toward the right side plate opening 59. Guide the sound as it progresses.
  • the right side plate opening 59 (first receiving opening) is an opening formed in the right side plate 13a, and is a through-hole penetrating the right side plate 13a along the left-right direction.
  • the right side plate opening 59 is disposed at a position facing the cab proximity guard opening 51 in the left-right direction.
  • the right side plate opening 59 communicates with the right connection duct 55. Further, the right side plate opening 59 communicates with the cab proximity guard opening 51 through the right connection duct 55.
  • the right side plate opening 59 allows sound emitted through the cab proximity guard opening 51 to be received by the center section region A (internal space) of the center section 0 through the right side plate opening 59.
  • the right side plate opening 59 is preferably arranged as follows.
  • the position of the right side plate opening 59 is set so that the rigidity of the center section 10 in which the right side plate opening 59 is formed is not reduced as much as possible.
  • the position of the right side plate opening 59 is set to a position in the center section 10 where it is determined that the strain energy is small and no large stress is applied in the strain energy distribution. This determination is made based on the force line assumed from the strain energy distribution and the principal stress vector diagram obtained by, for example, structural analysis.
  • the center duct 60 (at least a part thereof) is a duct arranged so as to overlap the center section 10 when viewed along the vertical direction. More specifically, as shown in FIG. 2, the center duct 60 is disposed in a center section region A defined by the two side plates 13.
  • the center section region A is a region on the left side of the right end portion of the right side plate 13a and on the right side of the left end portion of the left side plate 13b. Further, the center section region A is a region on the rear side of the front side end portion of the side plate 13 and on the front side of the rear side end portion of the side plate 13.
  • the center section area A includes an inner area A1, an upper area A2, and a lower area A3, which are classified along the vertical direction.
  • the internal region A1 is a region sandwiched between the right end of the right side plate 13a and the left end of the left side plate 13b.
  • the upper region A2 is a region above the center section 10 (above the upper end portions of the right side plate 13a and the left side plate 13b).
  • the upper region A2 is a region above a winch (not shown) attached to the center section 10.
  • the lower area A3 is an area below the center section 10 and includes an area below the bottom plate 11.
  • the center duct 60 is disposed in at least one of the inner region A1, the upper region A2, and the lower region A3. In the example shown in FIG. 3, the center duct 60 is disposed in the lower portion of the internal region A1.
  • the center duct 60 may be arrange
  • the center duct 60 includes a straight portion 61a.
  • the straight portion 61a is a portion where the flow direction is a straight line (including a substantially straight line) (the same applies to the other straight lines described below). The straight portion 61a extends to the left side from the right side plate opening 59 and extends to a position on the right side of the left side plate 13b.
  • the center duct 60 may include a portion other than the straight portion 61a.
  • the center duct 60 is disposed so as to extend from the right side plate opening 59 to the internal space of the center section 10 and guides the progress of sound into the internal space.
  • the center duct 60 is, for example, a cylinder formed by joining a plurality of plates, and may be a hose. A part of the center duct 60 may also be used (shared) as a member constituting the center section 10.
  • the center duct 60 can be configured simply by using the members also. Specifically, the bottom surface (lower surface) of the center duct 60 can also be used as the bottom plate 11 (configured by the bottom plate 11).
  • the rigidity of the center section 10 can be increased by setting the plate thickness of a portion (plate) that does not serve as the center section 10 among members constituting the center duct 60 to be thick.
  • the sound inside the cab proximity guard 20 is transmitted as follows from the upstream side to the downstream side. Sound inside the cab proximity guard 20 enters the inside of the center duct 60 through the inside of the cab proximity guard opening 51 (inlet of the duct structure 40), the right side connection duct 55, and the right side plate opening 59. It is transmitted. This sound is radiated from the most downstream position of the center duct 60 (exit of the duct structure 40) to the inner area A1 of the center section area A (in other words, a position away from the cab 25). The sound inside the center duct 60 may be radiated to the upper area A2 and the lower area A3.
  • the cooling air exhaust path generated by the fan 22 is the same as the sound path described above.
  • the right connection duct 55 and the center duct 60 guide the sound through the cab proximity guard opening 51 and the right side plate opening 59 so that the sound travels from the cab proximity guard 20 to the internal space of the center section 10.
  • a sound absorbing material may be provided on part or all of the inner surface of the duct structure 40. In this case, the sound passing through the inside of the duct structure 40 is absorbed by the sound absorbing material. As a result, the sound transmitted to the cab 25 is further reduced. If rain or the like can enter the center duct 60, it is desirable that no sound absorbing material be provided inside the center duct 60. When a sound absorbing material is provided, a member that covers the upper portion of the center duct 60 may be disposed in order to prevent rain from entering.
  • the upper swing body 1A shown in FIG. 1 has the following effects.
  • the upper swing body 1 ⁇ / b> A includes a center section 10, a cab proximity guard 20, a cab 25, and a duct structure 40.
  • the center section 10 has a plurality of side plates 13 facing each other along the left-right direction.
  • the cab proximity guard 20 is disposed on the right side or the left side of the center section 10 and accommodates the engine 21.
  • the cab 25 is disposed in front of or behind the cab proximity guard 20.
  • the duct structure 40 includes a cab proximity guard opening 51 and a center duct 60.
  • the cab proximity guard opening 51 is an opening formed in the cab proximity guard 20. Further, the center duct 60 communicates with the cab proximity guard opening 51 substantially. For this reason, the sound inside the cab proximity guard 20 is transmitted to the inside of the center duct 60. Moreover, in this embodiment, the center duct 60 is arrange
  • FIG. 24 shows a conventional upper swing body 601.
  • an opening 651 is formed in the cab proximity guard 20.
  • the opening 651 is, for example, an exhaust port for discharging the exhaust of the fan 22 or an intake port. From this opening 651, the sound emitted by the noise source (engine 21 and fan 22) inside the cab proximity guard 20 is radiated.
  • the sound radiated from the opening 651 propagates directly to the cab 25, for example.
  • multiple reflection of sound may occur as follows.
  • the sound radiated from the opening 651 is subjected to multiple reflections between the right side plate 13a and the cab proximity guard 20 facing each other in the left-right direction.
  • the sound radiated from the opening 651 is subjected to multiple reflections between the right side plate 13 a and the cab 25. As a result, sound is transmitted into the cab 25, and, for example, comfort in the cab 25 is reduced.
  • the sound inside the cab proximity guard 20 is transmitted to the center section region A through the duct structure 40, and thus is difficult to be transmitted to the cab 25. Therefore, the noise in the cab 25 can be suppressed.
  • the duct structure 40 includes a right connection duct 55 that allows the cab proximity guard opening 51 and the center duct 60 to communicate with each other. For this reason, it is difficult for sound to leak from the inside of the duct structure 40 to the outside between the cab proximity guard opening 51 and the center duct 60. Therefore, the noise in the cab 25 can be further suppressed.
  • the cab proximity guard opening 51 is disposed on the cab 25 side (front side) (between the engine 21 and the cab 25) with respect to the engine 21.
  • the duct structure 40 when the duct structure 40 is not provided, sound is more easily transmitted from the cab proximity guard opening 51 to the cab 25 as the position of the opening 651 is closer to the cab 25 (front side).
  • the upper swing body 1 ⁇ / b> A of the present embodiment includes a duct structure 40. Therefore, when the cab proximity guard opening 51 is at a position close to the cab 25, specifically, even when the cab proximity guard opening 51 is on the front side of the engine 21, noise in the cab 25 can be reliably suppressed.
  • the duct structure 40 includes a right outer opening 43 (cab proximity guard side outer opening) and a right duct 45 (guide portion, housing guard inner guide).
  • the configuration of the center duct 60 is different from that of the first embodiment.
  • the duct structure 40 further includes a right connection duct-like structure 155-2 (accommodating guard side connection duct-like structure).
  • the right external opening 43 is an opening formed in the cab proximity guard 20, is provided separately from the cab proximity guard opening 51, and is disposed at a position different from the cab proximity guard opening 51.
  • the right external opening 43 allows the inside and outside of the cab proximity guard 20 to communicate with each other.
  • the right external opening 43 allows the right duct 45 to communicate with the outside of the cab proximity guard 20.
  • the right external opening 43 is preferably provided at a position far from the cab 25 in the cab proximity guard 20, and is disposed, for example, at the rear portion and at the rear side surface.
  • the right outer opening 43 may be disposed on the right side surface or the left side surface of the cab proximity guard 20.
  • the right duct 45 is a duct arranged so as to extend from the cab proximity guard opening 51 into the cab proximity guard 20.
  • the inlet of the duct structure 40 is the cab proximity guard opening 51, but in this modified embodiment shown in FIG. 4, the inlet of the duct structure 40 is the most upstream of the right duct 45. Side position.
  • the right duct 45 communicates with the cab proximity guard opening 51.
  • the flow direction in the right duct 45 is the left direction and is linear.
  • the flow direction in the right duct 45 may be bent (similar to the bent portion 162a described below).
  • the right duct 45 guides the sound so that the sound generated by the engine 21 travels from the cab proximity guard opening 51 toward the right side plate opening 59.
  • the center duct 60 includes a bent portion 162a and a straight portion 162b, as shown in FIG. 4, instead of the straight portion 61a of the first embodiment shown in FIG.
  • the bent portion 162a is a portion where the flow direction is bent (changes) (the same applies to the other bent portions described below).
  • a sound reduction effect is obtained at a portion where the flow direction is bent, such as the bent portion 162a. The more the part where the flow direction bends, the greater the sound reduction effect due to the bend.
  • the bent portion 162a is disposed in the vicinity of the right side plate opening 59 and bends the flow direction from the left to the rear.
  • the straight portion 162b extends rearward from the bent portion 162a.
  • the most downstream position of the straight portion 162b is the outlet of the duct structure 40.
  • the right side surface of the straight portion 162b is defined by the right side plate 13a.
  • the right connection duct-like structure 155-2 (accommodating guard-side connection duct-like structure) is provided around the position of the right connection duct 55 (see FIG. 1) in the first embodiment.
  • the right connection duct-like structure 155-2 is a duct-like structure constituted by a cab proximity guard opening 51 (upstream part) and a right side plate opening 59 (downstream part) arranged so as to communicate substantially spatially. .
  • the right connection duct-like structure 155-2 allows the cab proximity guard opening 51 and the center duct 60 to communicate with each other substantially.
  • the duct-like structure means that the upstream part and the downstream part are spatially large enough to transmit at least part of the acoustic energy from the upstream part (cab proximity guard opening 51) to the downstream part (right side plate opening 59).
  • This is a continuous structure.
  • the “at least part” of the “at least part of acoustic energy” is, for example, 25% or more.
  • the duct structure 40 includes a right connection duct-like structure 155-2 that allows the cab proximity guard opening 51 and the center duct 60 to substantially communicate spatially. For this reason, even if the right connection duct 55 (see FIG. 1) is not provided, the center duct through the downstream portion (the right side plate opening 59) from the upstream portion (cab proximity guard opening 51) of the right connection duct-like structure 155-2. 60). Therefore, the noise of the cab 25 can be suppressed.
  • the duct structure 40 includes a right duct 45.
  • the right duct 45 is disposed inside the cab proximity guard 20 and communicates with the cab proximity guard opening 51. For this reason, the sound inside the cab proximity guard 20 is reduced by the right duct 45 and further reduced by the center duct 60. Therefore, compared with the case where the right duct 45 is not provided, noise in the cab 25 can be further suppressed.
  • the center duct 60 includes a bent portion 162a and a straight portion 162b, which are the same as those in the first modified embodiment. Furthermore, the center duct 60 includes a bent portion 163a and a straight portion 163b.
  • the bent portion 163a is disposed in the vicinity of the rear end portion of the straight portion 162b and bends the flow direction from the rear direction to the left direction.
  • the right side surface of the bent portion 163a is defined by the right side plate 13a.
  • the straight portion 163b extends to the left from the bent portion 163a.
  • the most downstream position of the straight portion 163b is the outlet of the duct structure 40, and is disposed on the right side of the left side plate 13b.
  • the center duct 60 includes a straight portion 61a similar to that of the first embodiment (see FIG. 1), as shown in FIG. Furthermore, the center duct 60 includes a bent portion 164a, an expansion / reduction portion 164b, and a straight portion 164c.
  • the bent portion 164a is disposed in the vicinity of the left end portion of the linear portion 61a and bends the flow direction from the left to the rear.
  • the expansion / contraction portion 164b is a portion where the cross-sectional area of the duct structure 40 as viewed along the flow direction changes, and is a portion where the cross-sectional area expands and contracts.
  • the expansion / contraction portion 164b is disposed on the rear side of the bent portion 164a.
  • the side surface on the outer side in the left-right direction of the expansion / reduction portion 164b is defined by the side plate 13.
  • the front side surface and the right side surface of the expansion / reduction portion 164b are also used as the straight portion 61a. As shown in FIG.
  • the expansion / contraction portion 164 b is also used as the connection member 15.
  • the connecting member 15 also used as the expansion / contraction part 164b is, for example, a connecting member 15 (see FIGS. 7 and 8) for reinforcing a support part of a gantry (not shown), and the vicinity (rear side) of the connecting member 15 The member 15 or the like.
  • the upstream end portion (inlet) and the downstream end portion (exit) of the expansion / contraction portion 164 b are configured by through holes formed in the connecting member 15.
  • the straight portion 164c extends rearward from the downstream end of the expansion / reduction portion 164b.
  • the downstream end of the straight portion 164 c is an outlet of the duct structure 40.
  • the straight portion 164c is omitted. In other embodiments, the straight portion 164c may not be provided.
  • the hydraulic hose 193 is disposed inside the duct structure 40 as shown in FIG.
  • the hydraulic hose 193 is disposed over the entire path from the inlet to the outlet of the duct structure 40.
  • the hydraulic hose 193 may be disposed only in a part of the path from the inlet to the outlet of the duct structure 40.
  • the hydraulic device to which the hydraulic hose 193 is connected is accommodated inside the cab proximity guard 20 (and the anti-cab side guard 30) (a large number of hydraulic devices may be accommodated).
  • an opening is required in the cab proximity guard 20. Therefore, the cab proximity guard opening 51 (see FIG.
  • the hydraulic hose 193 is disposed along the duct structure 40 so as to straddle at least between the cab proximity guard 20 and the center section 10.
  • an electric wire may be arranged inside the duct structure 40.
  • the electric wire is, for example, a bundle (wire harness), for example, for electric control, and may be for power supply, for example.
  • the electrical device to which the electric wire is connected is accommodated inside the cab proximity guard 20 (and the anti-cab side guard 30), as in the case of the hydraulic device described above (a large number of electrical devices may be accommodated).
  • the upper swing body 1D includes a hydraulic hose 193 or an electric wire disposed inside the duct structure 40 (hereinafter, “hydraulic hose 193 or electric wire” is referred to as “hydraulic hose 193”).
  • the duct structure 40 has a function as a path for passing the hydraulic hose 193 or the electric wire between the inside and outside of the cab proximity guard 20. For this reason, in the part in which the duct structure 40 is provided, it is not necessary to provide an opening (new opening) for passing the hydraulic hose 193 separately from the duct structure 40.
  • the right connection duct 155-5 (at least a part thereof) is disposed above the right side plate 13a.
  • the cab proximity guard opening 51 is disposed to face the right connection duct 155-5 in the left-right direction.
  • the right connection duct 155-5 includes a straight portion 155a and a bent portion 155b.
  • the straight portion 155a extends leftward from the cab proximity guard opening 51.
  • the bent portion 155b is disposed in the vicinity of the left end portion of the straight portion 155a, is disposed on the left side and above the right side plate 13a, and bends the flow direction from the left direction to the lower direction.
  • the center duct 60 includes a straight portion 165a, a bent portion 165b, and a straight portion 165c, unlike the first embodiment (see FIG. 1).
  • the straight portion 165a extends downward from the bent portion 155b.
  • the right side surface of the straight portion 165a is also used as the right side plate 13a.
  • the bent portion 165b is disposed in the vicinity of the lower end portion of the straight portion 165a and bends the flow direction from the lower direction to the left direction.
  • the lower surface of the bent portion 165b is also used as the bottom plate 11.
  • the straight line portion 165c extends leftward from the bent portion 165b.
  • the lower surface of the straight portion 165c is also used as the bottom plate 11.
  • the position of the downstream end portion of the straight portion 165 c is the outlet of the duct structure 40.
  • the right side plate opening 59 (see FIG. 1) is not provided in the right side plate 13a. Therefore, the rigidity of the right side plate 13a can be increased as compared with the case where the right side plate opening 59 is provided in the right side plate 13a.
  • a portion for bending the flow direction such as the bent portion 155b is required. For this reason, the pressure loss of the air (exhaust gas) flowing inside the duct structure 40 becomes larger than when it is not necessary to provide the bent portion 155b.
  • the cab proximity guard opening 151 is arranged as follows. In the fourth modified embodiment shown in FIG. 9 and the like, the cab proximity guard opening 51 is formed on the left side surface of the cab proximity guard 20. On the other hand, in this modified embodiment shown in FIG. 10, the cab proximity guard opening 151 is formed, for example, on the bottom surface (lower surface) of the cab proximity guard 20.
  • the right connection duct 155-6 (cab proximity guard side connection duct) is disposed below the right side plate 13a.
  • the right connection duct 155-6 includes a bent portion 155s, a straight portion 155t, and a bent portion 155u.
  • the bent portion 155s is disposed in the vicinity of the cab proximity guard opening 151, is disposed below the cab proximity guard opening 151, and bends the flow direction from the downward direction to the left direction.
  • the straight portion 155t extends to the left from the bent portion 155s.
  • the upper surface of the straight portion 155t is also used as the bottom plate 11.
  • the bent portion 155u is disposed in the vicinity of the left end portion of the straight portion 155t and bends the flow direction from the left to the upper.
  • the bottom plate opening 158 is an opening formed in the bottom plate 11 and is a through-hole penetrating the bottom plate 11 along the vertical direction.
  • the bottom plate opening 158 allows the right connection duct 155-6 and the center duct 60 to communicate with each other.
  • the center duct 60 includes a bent portion 166a.
  • the bent portion 166a is disposed in the vicinity of the bottom plate opening 158 and bends the flow direction from the upper direction to the left direction.
  • the upper swing body 201A includes a left side plate opening 271, a left side connection duct 275 (anti-cab side connection guide), and an anti cab side guard opening 279 (second receiving) that are not in the first embodiment. An opening).
  • the center duct 60 includes a straight portion 261a instead of the straight portion 61a (see FIG. 1) of the first embodiment.
  • the difference between the straight line portion 261a and the straight line portion 61a of the first embodiment is as follows. As shown in FIG. 1, the downstream end of the linear portion 61a of the first embodiment is disposed on the right side (center section region A) of the left side plate 13b. On the other hand, as shown in FIG. 11, the downstream end of the linear portion 261a of the present embodiment is connected to the left side plate 13b (left side plate opening 271).
  • the left side plate opening 271 (second discharge opening) is an opening formed in the left side plate 13b (position different from the right side plate opening 59), and is a through-hole penetrating the left side plate 13b along the left-right direction.
  • the left side plate opening 271 communicates with the center duct 60.
  • the left side plate opening 271 is preferably formed at a position where the rigidity of the center section 10 is not lowered as much as possible (similar to the right side plate opening 59).
  • the left side plate opening 271 allows sound to be emitted from the internal space of the center section 10 through the left side plate opening 271.
  • the left connection duct 275 (anti-cab side connection guide) is a duct that connects (connects) the anti-cab side guard opening 279 and the center duct 60.
  • the left connection duct 275 communicates with the left side plate opening 271.
  • the left connection duct 275 is disposed between the left side plate 13 b and the anti-cab side guard 30.
  • the flow direction in the left connection duct 275 is the left direction.
  • the left connection duct 275 guides the sound so that the sound travels from the left side plate opening 271 toward the anti-cab side guard opening 279.
  • the anti-cab side guard opening 279 is an opening formed in the anti-cab side guard 30 and is a through hole penetrating the right side wall of the anti-cab side guard 30 along the left-right direction.
  • the anti-cab side guard opening 279 is disposed at a position facing the left side plate 13b in the left-right direction.
  • the anti-cab side guard opening 279 communicates with the left connection duct 275.
  • the anti-cab side guard opening 279 communicates with the center duct 60 via the left connection duct 275 and the left side plate opening 271.
  • the anti-cab side guard opening 279 is the outlet of the duct structure 40. In FIG. 12, the left connection duct 275 and the anti-cab side guard opening 279 are omitted.
  • the anti-cab side guard opening 279 allows sound emitted through the left side plate opening 271 to be received inside the anti-cab side guard 30 through the anti-cab side guard opening 279.
  • the sound inside the cab proximity guard 20 shown in FIG. 11 (similar to exhaust) is transmitted in the following order from the upstream side to the downstream side. Similar to the first embodiment (see FIG. 1), the sound inside the cab proximity guard 20 is transmitted to the inside of the center duct 60. This sound is transmitted to the inside of the anti-cab side guard 30 through the inside of the left side plate opening 271, the inside of the left side connection duct 275, and the inside of the anti cab side guard opening 279. At this time, the right connection duct 55, the center duct 60, and the left connection duct 275 pass through the cab proximity guard 20 through the cab proximity guard opening 51, the right side plate opening 59, the left side plate opening 271 and the anti-cab side guard opening 279. The sound is guided so as to travel into the internal space of the section 10 and further into the anti-cab side guard 30.
  • the sound passing through the duct structure 40 is reduced by distance attenuation.
  • the sound reduction effect due to distance attenuation can be increased. Sound radiated from the inside of the duct structure 40 to the inside of the anti-cab side guard 30 is reduced by diffraction attenuation. Sound radiated from the inside of the anti-cab side guard 30 through the gap of the anti-cab side guard 30 to the outside of the anti-cab side guard 30 is reduced by diffraction attenuation.
  • a sound absorbing material may be provided inside (for example, the inner surface of) the anti-cab side guard 30. In this case, the sound inside the anti-cab side guard 30 is absorbed by the sound absorbing material. As a result, the sound transmitted to the cab 25 is further reduced.
  • the upper turning body 201A shown in FIG. 11 has the following effects.
  • the upper swing body 201 ⁇ / b> A includes an anti-cab side guard 30.
  • the anti-cab side guard 30 is arranged on the side (left side) opposite to the side (right side) where the cab proximity guard 20 and the cab 25 are arranged with respect to the center section 10.
  • the duct structure 40 includes an anti-cab side guard opening 279.
  • the anti-cab side guard opening 279 is an opening formed in the anti-cab side guard 30 and communicates with the center duct 60. For this reason, the sound inside the cab proximity guard 20 is transmitted to the inside of the anti-cab side guard 30 via the duct structure 40. Therefore, the duct structure 40 can transmit sound to a position where the distance in the left-right direction from the cab 25 is farther (for example, a position farther than the center section 10). Therefore, the noise in the cab 25 can be further suppressed.
  • the duct structure 40 includes a left connection duct 275 that allows the center duct 60 and the anti-cab side guard opening 279 to communicate with each other. For this reason, it is difficult for sound to leak from the inside of the duct structure 40 to the outside between the anti-cab side guard opening 279 and the center duct 60. Therefore, the noise in the cab 25 can be further suppressed.
  • the center duct 60 includes a bent portion 162a, a straight portion 162b, and a bent portion 163a, which are the same as those in the second modified embodiment (see FIG. 5). Further, the center duct 60 includes a straight portion 262a. The straight portion 262a extends leftward from the bent portion 163a. The downstream end of the straight portion 262a is connected to the left side plate 13b (left side plate opening 271).
  • the center duct 60 includes a linear portion 61a, a bent portion 164a, and an expansion / reduction portion 164b similar to those of the third modified embodiment (see FIG. 6). Furthermore, the center duct 60 includes a bent portion 263a and a straight portion 263b.
  • the bent portion 263a is disposed in the vicinity of the rear end portion of the expansion / reduction portion 164b and bends the flow direction from the rear direction to the left direction.
  • the straight portion 263b extends leftward from the bent portion 263a.
  • the downstream end of the straight line portion 263b is connected to the left side plate 13b (left side plate opening 271).
  • the front and left side surfaces of the straight portion 263b are also used as the expansion / contraction portion 164b.
  • the outlet of the duct structure 40 is disposed in the anti-cab side guard opening 279 in the second embodiment illustrated in FIG. 11, but is disposed in the anti-cab side guard 30 in the present embodiment illustrated in FIG. 15.
  • the duct structure 40 includes a left connection duct-like structure 375 (an anti-cab side connection duct-like structure).
  • the upper swing body 301A includes a left duct 380 (an anti-cab side guard internal guide).
  • the left connection duct-like structure 375 is provided around the position of the left connection duct 275 (see FIG. 11) in the second embodiment. As shown in FIG. 15, the left connection duct-like structure 375 includes a left side plate opening 271 (upstream part) and an anti-cab side guard opening 279 (downstream part) arranged so as to be substantially spatially communicated. It is a duct-like structure. The left connection duct-like structure 375 makes the center duct 60 and the anti-cab side guard opening 279 substantially communicate spatially.
  • the left duct 380 is a duct disposed so as to extend from the anti-cab side guard opening 279 to the inside of the anti-cab side guard 30.
  • the left duct 380 communicates with the anti-cab side guard opening 279.
  • the left duct 380 guides the progress of sound into the anti-cab side guard 30.
  • the left duct 380 includes a bent portion 381a, a straight portion 381b, and a bent portion 381c.
  • the bent portion 381a is disposed in the vicinity of the anti-cab side guard opening 279 and bends the flow direction from the left to the rear.
  • the straight portion 381b extends rearward from the bent portion 381a.
  • a part of the left duct 380 is also used as a member constituting the anti-cab side guard 30.
  • the right surface of the straight portion 381b is also used as the right surface (side surface) of the anti-cab side guard 30 (the same applies to the right surface of the bent portion 381c).
  • the bent portion 381c is disposed in the vicinity of the rear end portion of the straight portion 381b and bends the flow direction from the rear direction to the left direction.
  • the downstream end of the bent portion 381 c is an outlet of the duct structure 40.
  • the left connection duct 275 and the anti-cab side guard opening 279 shown in FIG. 15 are omitted.
  • the duct structure 40 includes a left connection duct-like structure 375 that substantially communicates the center duct 60 and the anti-cab side guard opening 279 in space. For this reason, even if the left connection duct 275 (see FIG. 11) is not provided, the upstream portion (center duct 60 via the left side plate opening 271) to the downstream portion (anti-cab side guard opening 279) of the left connection duct-like structure 375. ). Therefore, the noise of the cab 25 can be suppressed.
  • the upper swing body 401A of the fourth embodiment of the present invention With reference to FIG. 17, a difference between the upper swing body 401A of the fourth embodiment of the present invention and the previous third embodiment (see FIG. 15) will be described.
  • the difference is the configuration of the center duct 60, the configuration of the left duct 380, and the position of the outlet of the duct structure 40.
  • the position of the outlet of the duct structure 40 is inside the anti-cab side guard 30, but in the fourth embodiment shown in FIG. 17, a position communicating with the outside of the anti-cab side guard 30.
  • the upper swing body 401A includes a left outer opening 490 (third discharge opening).
  • the center duct 60 includes a straight portion 461a, a bent portion 461b, a straight portion 461c, and a bent portion 461d instead of the straight portion 261a (see FIG. 15) of the third embodiment.
  • the straight line portion 461a is configured in substantially the same manner as the straight line portion 61a (see FIG. 1) of the first embodiment.
  • the difference between the straight line part 461a and the straight line part 61a (see FIG. 1) is that the downstream end of the straight line part 461a is not the outlet of the duct structure 40.
  • the bent portion 461b is disposed in the vicinity of the left end portion of the straight portion 461a and bends the flow direction from the left to the rear.
  • the left side surface of the bent portion 461b is also used as the left side plate 13b (the same applies to the left side surface of the straight portion 461c).
  • the straight line portion 461c extends rearward from the bent portion 461b.
  • the bent portion 461d is disposed in the vicinity of the rear end portion of the straight portion 461c, bends the flow direction from the rear direction to the left direction, and is connected to the left side plate 13b.
  • the left duct 380 includes a straight portion 481a.
  • the straight portion 481 a extends leftward from the anti-cab side guard opening 279 and is connected to the left side surface (side surface) of the anti-cab side guard 30.
  • the left external opening 490 (third discharge opening) is an opening formed in the anti-cab side guard 30.
  • the left outer opening 490 is disposed on the left side surface (side surface) of the anti-cab side guard 30, and is disposed, for example, in a lower portion (for example, near the lower end portion) of the anti-cab side guard 30.
  • the left external opening 490 allows the left duct 380 to communicate with the outside of the anti-cab side guard 30 (the outside of the upper swing body 401A).
  • the left outer opening 490 is provided separately from the anti-cab side guard opening 279 (disposed at a different position).
  • the left outer opening 490 allows sound to be emitted from the left duct 380 to the outside of the anti-cab side guard 30 through the left outer opening 490.
  • Sound inside the cab proximity guard 20 (similar to exhaust) is transmitted in the following order from the upstream side to the downstream side. Similar to the second embodiment (see FIG. 11), the sound inside the cab proximity guard 20 is transmitted to the inside of the anti-cab side guard opening 279. This sound is transmitted (radiated) to the outside of the anti-cab side guard 30 (outside the upper swing body 401A) through the inside of the left duct 380 and the inside of the left external opening 490. Further, similarly to this sound, the cooling air generated by the fan 22 is exhausted to the outside of the upper swing body 401A.
  • the right connection duct 55, the center duct 60, the left connection duct 275, and the left duct 380 pass through the cab proximity guard opening 51, the right side plate opening 59, the left side plate opening 271, the anti-cab side guard opening 279, and the left external opening 490.
  • the sound is guided so that the sound travels from the cab proximity guard 20 to the inner space of the center section 10, the inside of the anti-cab side guard 30, and the outside of the anti-cab side guard 30.
  • the upper swing body 401A shown in FIG. 17 has the following effects.
  • the duct structure 40 includes a left duct 380 and a left external opening 490.
  • the left duct 380 is disposed inside the anti-cab side guard 30 and communicates with the anti-cab side guard opening 279.
  • the left outer opening 490 is an opening formed in the anti-cab side guard 30 and is provided separately from the anti-cab side guard opening 279 and communicates the left duct 380 and the outside of the anti-cab side guard 30.
  • the noise inside the cab proximity guard 20 is transmitted to the outside of the anti-cab side guard 30 through the inside of the left duct 380 and the left outside opening 490. Therefore, the duct structure 40 can transmit sound to a position where the distance in the left-right direction from the cab 25 is farther (for example, a position farther than the center section region A). Therefore, the noise in the cab 25 can be further suppressed.
  • the left duct 380 includes a bent portion 482a, a straight portion 482b, a bent portion 482c, and a straight portion 482d instead of the straight portion 481a (see FIG. 17) of the fourth embodiment.
  • the bent portion 482a is disposed in the vicinity of the anti-cab side guard opening 279 and bends the flow direction from the left to the rear.
  • the straight portion 482b extends rearward from the bent portion 482a. Unlike the straight line portion 381b (see FIG. 15) of the third embodiment, the right side surface of the straight line portion 482b is not used as the left side plate 13b.
  • the bent portion 482c is provided in the vicinity of the rear end portion of the straight portion 482b and bends the flow direction from the rear direction to the left direction.
  • the straight portion 482d extends to the left from the bent portion 482c.
  • the downstream end of the straight portion 482d is connected to the left side surface of the anti-cab side guard 30 and communicates with the left external opening 490.
  • the left duct 380 includes a straight portion 483a, a bent portion 483b, a straight portion 483c, and a bent portion 483d shown in FIG. 20 instead of the straight portion 481a (see FIG. 17) of the fourth embodiment.
  • the straight portion 483a is configured in substantially the same manner as the straight portion 481a (see FIG. 17) of the fourth embodiment.
  • the downstream end part of the straight line part 483a is not directly connected to the left external opening 490.
  • the bent portion 483b is disposed in the vicinity of the left end portion of the linear portion 483a, and bends the flow direction from the left direction to the upward direction.
  • the left side surface of the bent portion 483b is also used as the left side surface of the anti-cab side guard 30 (the same applies to the left side surface of the straight portion 483c).
  • the straight portion 483c extends upward from the bent portion 483b.
  • the bent portion 483d is disposed in the vicinity of the upper end portion of the linear portion 483c, bends the flow direction from the upper direction to the left direction, and is connected to the left side surface of the anti-cab side guard 30.
  • the upper surface of the bent portion 483d is also used as the upper surface of the anti-cab side guard 30.
  • the left outer opening 490 is disposed, for example, in the vicinity of the upper end portion of the anti-cab side guard 30 and communicates with the bent portion 483d.
  • the left duct 380 includes a bent portion 484a, a straight portion 484b, a bent portion 484c, and a straight portion 484d instead of the straight portion 481a (see FIG. 17) of the fourth embodiment.
  • the bent portion 484a is disposed in the vicinity of the anti-cab side guard opening 279 and bends the flow direction from the left to the front.
  • the straight portion 484b extends forward from the bent portion 484a.
  • the right side surface of the straight portion 484b is also used as the right side surface of the anti-cab side guard 30 (the same applies to the right side surface of the bent portion 484c).
  • the bent portion 484c is disposed in the vicinity of the front end portion of the straight portion 484b and bends the flow direction from the front direction to the left direction.
  • the straight portion 484d extends to the left from the bent portion 484c.
  • the downstream end of the straight portion 484d is connected to the left surface of the anti-cab side guard 30 and communicates with the left external opening 490.
  • auxiliary ventilation device 595 is a device that assists the air inside the duct structure 40 to flow easily.
  • the auxiliary ventilation device 595 allows air (exhaust) inside the duct structure 40 to flow (discharge) smoothly even when the pressure loss inside the duct structure 40 is large.
  • the auxiliary ventilation device 595 is specifically a fan (a fan different from the fan 22).
  • the auxiliary ventilation device 595 is a sound source and may affect the increase in noise in the cab 25.
  • the auxiliary ventilation device 595 is preferably arranged at a position far from the cab 25. Specifically, the auxiliary ventilation device 595 is disposed inside the left duct 380, and is disposed, for example, at a left portion (for example, an end portion) of the left duct 380, and is disposed at, for example, the bent portion 483b.
  • auxiliary ventilation device 595 is provided.
  • the auxiliary ventilation device 595 is arranged inside the center duct 60, and is arranged, for example, inside the expansion / contraction part 164b.
  • the above embodiments may be variously modified. Components in different forms may be combined.
  • the right duct 45 of the first modified embodiment may be added to the first embodiment (see FIG. 1).
  • the right connection duct 55 of the first embodiment may be replaced with a right connection duct-like structure 155-2 (see FIG. 4).
  • the number and arrangement of the constituent elements of each of the above forms may be changed. For example, the number of the side plates 13 shown in FIG. Moreover, a part of component of said each form does not need to be provided (below).
  • the configuration of the duct structure 40 may be changed as follows.
  • the position of the inlet of the duct structure 40, the position of the outlet, the length, the shape, and the like may be changed. Whether or not the duct structure 40 is shared with other members may be changed.
  • the number of paths from the inlet to the outlet of the duct structure 40 may be one or a plurality, for example, may be branched or merged.
  • the duct structure 40 may have one or more inlets (the same applies to the outlets).
  • the cross-sectional shape of the duct structure 40 may be constant (for example, rectangular) from the inlet to the outlet, or may change in the middle of the path.
  • the duct structure 40 is an exhaust duct in each of the above embodiments, but may be an intake duct (the inlet of the duct structure 40 may be an intake port). More specifically, air (intake air) before being sucked into the fan 22 may flow inside the duct structure 40. The cooling air generated by the fan 22 does not have to flow inside the duct structure 40. The direction in which the sound is transmitted inside the duct structure 40 and the direction in which the cooling air generated by the fan 22 flows may be the same or opposite.
  • a duct such as the center duct 60 may have a small opening or a gap.
  • the right connection duct 55 may not be provided.
  • the left connection duct 275 may not be provided.
  • the right connection duct 55 is closer to the cab 25 than the left connection duct 275. Therefore, compared with the case where the right connection duct 55 is not provided and the left connection duct 275 is provided, the noise of the cab 25 can be suppressed when the left connection duct 275 is not provided and the right connection duct 55 is provided.
  • the position and number of the expansion / reduction unit 164b may be changed.
  • the expansion / contraction part 164b is provided in the center section 10 in the above embodiment, but may be provided in the anti-cab side guard 30.
  • the left connection duct 275 (see FIG. 11) is arranged above and below the left side plate 13b, like the right connection duct 155-5 (see FIG. 9) and the right connection duct 155-6 (see FIG. 10). Also good.
  • the position and number of auxiliary ventilation devices 595 may be changed.
  • the propagation part which concerns on this invention is not limited to a thing provided with a duct structure like the duct structure 40.
  • a propagation part may be formed so that a sound may advance between a pair of plate-like members arranged at intervals.
  • the propagation portion may include only the cab proximity guard opening 51 and the right side plate opening 59 and may not include the right connection duct 55 and the center duct 60.
  • the sound emitted by the engine 21 can be propagated from the cab proximity guard 20 into the center section 10.
  • the right side plate opening 59 is not limited to the one that is disposed at a position that opposes the cab proximity guard opening 51 in the left-right direction, and the sound emitted by the engine 21 passes between the two. Any other form may be used.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

L'invention concerne un corps rotatif supérieur pour un engin de chantier, qui est conçu pour supprimer le bruit dans une cabine. Un corps rotatif supérieur 1A comporte une structure de conduit 40. La structure de conduit 40 comprend une ouverture de protection de proximité de cabine 51 et une ouverture de plaque latérale droite 59. L'ouverture de protection de proximité de cabine 51 et l'ouverture de plaque latérale droite 59 sont des ouvertures respectivement formées dans une protection de proximité de cabine 20 et une plaque latérale droite 13a. La structure de conduit 40 guide la propagation de son de la protection de proximité de cabine 20 à une section centrale 60.
PCT/JP2016/087334 2016-02-12 2016-12-15 Corps rotatif supérieur pour engin de chantier WO2017138249A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16889950.8A EP3415459B1 (fr) 2016-02-12 2016-12-15 Corps rotatif supérieur pour engin de chantier

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-025020 2016-02-12
JP2016025020A JP6747819B2 (ja) 2016-02-12 2016-02-12 建設機械の上部旋回体

Publications (1)

Publication Number Publication Date
WO2017138249A1 true WO2017138249A1 (fr) 2017-08-17

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PCT/JP2016/087334 WO2017138249A1 (fr) 2016-02-12 2016-12-15 Corps rotatif supérieur pour engin de chantier

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EP (1) EP3415459B1 (fr)
JP (1) JP6747819B2 (fr)
WO (1) WO2017138249A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911782Y2 (ja) * 1979-02-09 1984-04-10 株式会社加藤製作所 作業車両の騒音低減装置
JP2003082705A (ja) * 2001-09-10 2003-03-19 Hitachi Constr Mach Co Ltd 建設機械の旋回フレームおよびその製造方法
JP2010179707A (ja) * 2009-02-03 2010-08-19 Kobelco Cranes Co Ltd 作業車両
JP2013230907A (ja) * 2012-04-27 2013-11-14 Kobe Steel Ltd クレーンの上部旋回体

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4160454B2 (ja) * 2003-06-23 2008-10-01 新キャタピラー三菱株式会社 建設機械のエンジンフード，建設機械のエンジンルーム構造及び建設機械のエンジン冷却装置
JP4539133B2 (ja) * 2004-03-01 2010-09-08 コベルコ建機株式会社 建設機械の排気構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5911782Y2 (ja) * 1979-02-09 1984-04-10 株式会社加藤製作所 作業車両の騒音低減装置
JP2003082705A (ja) * 2001-09-10 2003-03-19 Hitachi Constr Mach Co Ltd 建設機械の旋回フレームおよびその製造方法
JP2010179707A (ja) * 2009-02-03 2010-08-19 Kobelco Cranes Co Ltd 作業車両
JP2013230907A (ja) * 2012-04-27 2013-11-14 Kobe Steel Ltd クレーンの上部旋回体

Also Published As

Publication number Publication date
JP6747819B2 (ja) 2020-08-26
JP2017141104A (ja) 2017-08-17
EP3415459A4 (fr) 2019-09-04
EP3415459A1 (fr) 2018-12-19
EP3415459B1 (fr) 2022-04-27

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