WO2014073342A1 - Construction machine - Google Patents

Construction machine Download PDF

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Publication number
WO2014073342A1
WO2014073342A1 PCT/JP2013/078068 JP2013078068W WO2014073342A1 WO 2014073342 A1 WO2014073342 A1 WO 2014073342A1 JP 2013078068 W JP2013078068 W JP 2013078068W WO 2014073342 A1 WO2014073342 A1 WO 2014073342A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
cover
insertion hole
head
exterior cover
Prior art date
Application number
PCT/JP2013/078068
Other languages
French (fr)
Japanese (ja)
Inventor
勝志 中根
Original Assignee
日立建機株式会社
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 日立建機株式会社 filed Critical 日立建機株式会社
Priority to JP2014545625A priority Critical patent/JP5951794B2/en
Publication of WO2014073342A1 publication Critical patent/WO2014073342A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/02—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning intake
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/08—Front or rear portions
    • B62D25/10—Bonnets or lids, e.g. for trucks, tractors, busses, work vehicles
    • 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
    • E02F9/0891—Lids or bonnets or doors or details thereof

Definitions

  • the present invention relates to a construction machine such as a hydraulic shovel, a wheel type hydraulic shovel, or a hydraulic crane, and more particularly, to a construction machine provided with an exterior cover that covers mounted devices such as a motor mounted on a vehicle body and a hydraulic pump.
  • a hydraulic excavator as a representative example of a construction machine has a vehicle body constituted by a self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, and a front portion of the upper revolving body On the side, a working device for carrying out a digging operation and the like is provided so as to be capable of raising and lowering.
  • the hydraulic shovel is self-propelled to the work site by the lower traveling body, and performs excavation work of soil and the like using the work device.
  • the upper swing body of the hydraulic shovel includes a swing frame forming a support structure swingably provided on the lower traveling body, a cab disposed on the front left side of the swing frame and defining a cab, and a swing frame A counterweight provided on the rear end side to balance the weight with the working device, a mounted device including an engine mounted on the swing frame and located on the front side of the counterweight, and covering the mounted device to It is roughly configured by an exterior cover disposed on the front side.
  • the mounted device mounted on the swing frame includes an engine, a hydraulic pump driven by the engine and supplying hydraulic fluid for operation toward the hydraulic actuator, and a heat exchange device including a radiator, an oil cooler, etc. It is comprised including.
  • the exterior cover covers the mounted devices such as the engine, hydraulic pump, heat exchange device, etc., and an upper surface cover which covers the mounted devices from above, and a left side door cover which covers the mounted devices openably and closably from the left
  • the right side door cover covers the mounted device so as to be openable and closable from the right side.
  • an engine cover is generally provided that covers the upper side of the engine so as to be openable and closable.
  • accessory parts that constitute a part of the mounted device are disposed.
  • An air cleaner for cleaning the intake air of the engine is known as a representative example of this accessory.
  • a hydraulic shovel configured to attach an air cleaner as an accessory component to the inner surface side of an exterior cover using a bolt.
  • a sealing material made of an elastic material such as rubber is usually used to close the gap between the engine cover and the exterior cover. It is attached over the entire circumference.
  • a cover mounting structure for mounting an undercover using bolts on the lower surface side of a vehicle body of an industrial vehicle.
  • a through hole having a diameter larger than the head of the bolt is formed in the frame of the vehicle body, and a plate in which a recessed portion in which the head of the bolt is accommodated is fixed in the through hole.
  • the undercover can be attached to the frame of the vehicle body using the bolt while the head of the bolt is accommodated in the recess of the plate.
  • the head of the bolt for attaching the undercover to the frame of the vehicle body is accommodated in the through hole of the frame through the depression of the plate, so that, for example, the head of the bolt contacts the ground when the industrial vehicle travels. Also, it is possible to protect the bolt by suppressing the impact of flying stones on the head of the bolt (for example, Patent Document 2).
  • the thickness of the exterior cover is usually smaller than the thickness dimension of the head of a bolt for attaching an air cleaner to the exterior cover.
  • the head of the bolt protrudes from the outer surface of the exterior cover, and there is a problem that the seal material provided at the lower end edge of the engine cover contacts the head of the bolt and is damaged.
  • the present invention has been made in view of the above-described problems of the prior art, and when attaching an accessory to the exterior cover using a bolt, it is possible to suppress that the head of the bolt protrudes to the outer surface side of the exterior cover.
  • the purpose is to provide construction equipment that
  • the present invention provides a self-propelled vehicle body, a mounted device including a motor mounted on the vehicle body, an exterior cover provided on the vehicle body to cover the mounted device, and an exterior cover
  • the present invention is applied to a construction machine provided with an accessory component which is disposed on the inner surface side of and which constitutes a part of the mounting device.
  • a feature of the present invention is that the exterior cover is provided with a bolt insertion hole through which the head and shaft of a bolt for attaching the accessory are inserted, and the inner surface of the exterior cover corresponds to the bolt insertion hole
  • a bolt head receiving seat is provided which is disposed at a position and into which the shaft portion of the bolt is inserted, and a bolt head receiving seat for receiving the head of the bolt is provided, and between the bolt head receiving seat and the exterior cover Forming a bolt head housing space for housing the head portion of the bolt, and using the bolt inserted into the shaft insertion hole of the bolt head support through the bolt insertion hole. It is configured to be attached to the inner surface side of the exterior cover, and in a state where the accessory is attached using the bolt, the head of the bolt is accommodated in the bolt head accommodation space.
  • the bolt head since the bolt head is accommodated in the bolt head receiving space formed between the outer cover and the bolt head seat, the bolt head protrudes to the outer surface side of the outer cover. Can be reliably suppressed. As a result, the member disposed on the outer surface side of the exterior cover can be reliably restrained from interfering with the head of the bolt and breaking.
  • the upper surface side of the exterior cover is provided with a prime mover cover that comes in contact with the upper surface of the exterior cover when the upper position of the prime mover is open and closed so as to be closed.
  • the motor cover is provided at a portion closed by the motor cover.
  • the prime mover cover when the prime mover cover is in the closed position, the head of the bolt is concealed in the bolt head accommodation space even if the bolt insertion hole is closed by the prime mover cover. This can prevent the prime mover cover from contacting the head of the bolt and protect the prime mover cover.
  • the prime mover cover is constituted by a frame portion surrounding a working opening provided in the upper surface cover of the exterior cover, and a lid portion covering the upper end side of the frame portion, and the frame portion A sealing material is provided on the entire lower end edge of the bolt, and the bolt insertion hole is provided at a position in contact with the sealing material.
  • the shaft portion of another bolt is inserted into the exterior cover in the vicinity of the bolt insertion hole and at a position visible from the outside even when the motor cover is in the closed position.
  • a through hole is provided, and the accessory is attached to the inner surface side of the exterior cover using the bolt and the other bolt inserted into the through hole.
  • the bolt inserted into the shaft insertion hole of the bolt head seat through the bolt insertion hole of the exterior cover and the other bolt inserted into the through hole of the exterior cover Accessories can be attached securely to the exterior cover.
  • the bolt head seat is opposed to the inner surface of the outer cover with a gap, and the bottom surface on which the shaft insertion hole is bored and the protruding end portion protrudes from the bottom toward the outer cover
  • a frame with a U-shaped cross section having a side surface fixed to the inner surface of the exterior cover, one end side is fixed to the bottom surface of the frame, the other end side is in contact with the accessory, and the shaft of the bolt is inserted It comprises with the cylinder which has the axial part penetration hole.
  • the shaft portion of the bolt inserted into the bolt insertion hole of the exterior cover is screwed into the accessory after being inserted into the frame and the cylinder of the bolt head seat. Therefore, in the state where the attachment is in contact with the other end side of the cylinder, the attachment can be securely fastened to the inner surface of the exterior cover using a bolt.
  • the frame of the bolt head seat is formed in a U-shaped cross section by the bottom and the side, for example, even when rainwater or the like infiltrates the inner surface side of the exterior cover through the bolt insertion hole, this rainwater Can be discharged to the outside through the space formed between the exterior cover and the frame. Therefore, it is suppressed that rain water etc. stay in the bolt head accommodation space between the exterior cover and the bolt head seat, and corrosion of the bolt head accommodated in the bolt head accommodation space is prevented. can do.
  • the accessory component is provided with a screw portion insertion hole through which a screw portion screwed to the shaft portion of the bolt is inserted, and a screw portion of the bolt is disposed at a position facing the screw portion insertion hole.
  • the shaft portion of the bolt is inserted through the shaft insertion hole of the bolt head seat in a state where the cylinder of the bolt head seat is in contact with the accessory, and the shaft portion of the bolt is
  • the threaded screw portion is temporarily tightened to a nut attached to the accessory
  • the head of the bolt can be properly protruded from the outer surface of the exterior cover.
  • the mounted device includes an engine as the prime mover and an air cleaner for removing dust in the air supplied to the engine, and the accessory component includes a part of the mounted device. It is set as the said air cleaner to comprise.
  • part of the prime mover cover is the bolt head by retracting the head of the bolt to the inner surface side of the exterior cover. It is possible to suppress interference with the department.
  • FIG. 1 is a front view showing a wheeled hydraulic excavator according to an embodiment of the present invention. It is a top view which shows the upper revolving superstructure of a wheel type hydraulic shovel. It is a perspective view of the principal part expansion which shows a left front upper surface cover, a left rear upper surface cover, an air cleaner, etc. in the state which made the engine cover a closed position.
  • FIG. 4 is a perspective view showing a left front upper surface cover, a left rear upper surface cover, an air cleaner, etc. in FIG. 3 with the engine cover in an open position. It is a perspective view which shows left front upper surface cover alone.
  • FIG. 3 is a cross-sectional view of a left front upper surface cover, a bolt head seat, an air cleaner, a bolt and the like as viewed in the direction of arrows VII-VII in FIG. 2;
  • FIG. 8 is a cross-sectional view of a left front upper surface cover, a bolt insertion hole, a bolt head seat, an air cleaner, a bolt, a nut and the like as viewed in the direction of arrows VIII-VIII in FIG. 7; It is sectional drawing of the position similar to FIG.
  • FIG. 8 which shows the relationship between the length dimension from the outer surface of a left front upper surface cover to the nut provided in the air cleaner, and the length dimension of the axial part of a bolt. It is sectional drawing of the position similar to FIG. 8 which shows the state which temporarily tightened the bolt penetrated to the axial part penetration hole of a bolt head bearing to a nut.
  • FIGS. 1 to 10 the embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 10 by taking a case where the invention is applied to a wheeled hydraulic shovel as an example.
  • the wheeled hydraulic excavator 1 indicates a wheeled hydraulic shovel as a representative example of a construction machine.
  • the wheeled hydraulic excavator 1 includes a wheeled lower traveling body 2 having left and right front wheels 2A and left and right rear wheels 2B, and an upper revolving structure 3 rotatably mounted on the lower traveling body 2. And consists of.
  • the lower traveling body 2 and the upper swing body 3 constitute the vehicle body of the wheeled hydraulic excavator 1 according to the present invention.
  • a working device 4 is provided on the front side of the upper revolving superstructure 3 so as to be capable of raising and lowering.
  • the working device 4 comprises a boom 4A, an arm 4B, a bucket 4C, a boom cylinder 4D, an arm cylinder 4E, a bucket cylinder 4F, etc. ing.
  • the wheeled hydraulic excavator 1 travels on a public road or the like by the lower traveling body 2 and performs excavating work and the like of earth and sand using the work device 4 while turning the upper swing body 3 at the work site.
  • the upper swing body 3 of the wheeled hydraulic excavator 1 includes a swing frame 5, a counterweight 6, a cab 7, an engine 10, a heat exchange device 11, a hydraulic pump 12 and an exterior cover 17 described later. It is roughly configured by the engine cover 25.
  • the pivoting frame 5 is the base of the upper pivoting body 3 and the pivoting frame 5 forms a rigid support structure.
  • the pivot frame 5 is disposed at the central portion in the left and right directions, and extends in the front and rear directions, and the base plate 5A is erected on the bottom plate 5A and extends in the front and rear directions while facing in the left and right directions.
  • a left vertical plate 5B and a right vertical plate 5C are provided.
  • the base end (foot portion) of the boom 4A constituting the working device 4 is rotatably attached, and after the left, right vertical plates 5B, 5C
  • a counterweight 6 is attached to the end.
  • the counterweight 6 is mounted on the rear end side of the swing frame 5, and the counterweight 6 balances the weight with the work device 4.
  • the wheeled hydraulic excavator 1 travels on a public road, it is desirable to make the turning radius of the upper swing body 3, that is, the distance from the swing center of the upper swing body 3 to the rear surface of the counterweight 6 as small as possible. For this reason, the counterweight 6 is disposed at a position close to the turning center of the upper swing body 3.
  • the cab 7 is disposed on the front left side of the turning frame 5, and the cab 7 defines an operator's cab.
  • a driver's seat on which the operator is seated a steering wheel for steering the front wheel 2A of the lower traveling body 2, a turning operation of the upper swing body 3 and an excavation operation by the work device 4
  • An operation lever device etc. (all not shown) are provided.
  • the hydraulic oil tank 8 is mounted on the swing frame 5 so as to be located on the right side of the working device 4.
  • the hydraulic oil tank 8 stores hydraulic oil supplied to various hydraulic actuators attached to the wheeled hydraulic excavator 1.
  • the fuel tank 9 is mounted on the swing frame 5 adjacent to the right side of the hydraulic oil tank 8.
  • the fuel tank 9 is for storing the fuel supplied to the engine 10 described later.
  • the reference numeral 10 denotes an engine as a prime mover which is located on the front side of the counterweight 6 and mounted on the rear side of the swing frame 5.
  • the engine 10 constitutes an internal combustion engine, and is disposed in a horizontally disposed state in which the axis of a crankshaft (not shown) extends leftward and rightward.
  • a heat exchange device 11 including a radiator, an oil cooler, and the like is disposed on the left side of the engine 10, and a hydraulic pump 12 is disposed on the right side of the engine 10.
  • the radiator is for cooling the cooling water of the engine 10
  • the oil cooler is for cooling the hydraulic oil returned from each hydraulic actuator.
  • the hydraulic pump 12 is driven by the engine 10 to discharge pressure oil for operation to various hydraulic actuators mounted on the wheeled hydraulic excavator 1. That is, the hydraulic pump 12 includes a boom cylinder 4D provided in the working device 4, an arm cylinder 4E, a bucket cylinder 4F, a traveling hydraulic motor provided in the lower traveling body 2, and a hydraulic pressure for turning provided in the upper swing body 3.
  • the pressure oil for operation is discharged to the motor (not shown).
  • the intake pipe 13 is for supplying air to the engine 10, and the intake pipe 13 extends from the engine 10 toward a left side cover 18 described later. That is, the base end side (downstream side) of the intake pipe 13 is connected to the intake side of the engine 10, and the tip end side (upstream side in the suction direction) of the intake pipe 13 extends to the vicinity of the left side cover 18 An air cleaner 14 described later is connected to the tip end side of the intake pipe 13.
  • An air cleaner 14 is disposed on the inner surface side of the exterior cover 17, and the air cleaner 14 is a representative example of accessories constituting a part of a mounted device such as the engine 10 as described later.
  • the air cleaner 14 is disposed on the inner surface side of the exterior cover 17 in a horizontally placed state so as to be parallel to the engine 10.
  • the air cleaner 14 centrifugally separates dust in the air supplied to the engine 10 through the intake pipe 13 and circulates only the cleaned air to the intake pipe 13.
  • positioned at the inner surface side of the exterior cover 17 are not only the air cleaner 14, for example, there exist intake piping, a fuel filter, an engine oil filter, a reserve tank, a tool box etc. (all are not shown).
  • the air cleaner 14 is provided in a cylindrical casing 14A disposed in the vicinity of the heat exchange device 11 in a horizontally placed state where the axis extends in the left and right directions, and is provided in the casing 14A to capture dust in the air.
  • a filter element (not shown), an air inflow pipe 14B provided downward at an axially intermediate position of the casing 14A, and an air outflow pipe 14C provided on one axial end side (engine 10 side) of the casing 14A.
  • a dust discharge pipe 14D provided in a downward state on the other axial end side of the casing 14A (on the side of the left side cover 18 described later).
  • An air outflow pipe 14C of the air cleaner 14 is connected to the tip end side of the intake pipe 13.
  • the air cleaner 14 captures dust in the air introduced into the casing 14A through the air inflow pipe 14B by the filter element, and swirls air in the casing 14A to separate dust in the air.
  • the air cleaner 14 supplies the cleaned air only from the air outflow pipe 14C to the engine 10 through the intake pipe 13 by discharging the centrifugally separated dust to the outside of the casing 14A through the dust discharge pipe 14D.
  • Reference numerals 15 and 16 denote two brackets integrally provided on the casing 14A of the air cleaner 14, and each of the brackets 15 and 16 constitutes a part of the casing 14A.
  • One bracket 15 is provided on the air outflow pipe 14C side of the air cleaner 14, and the other bracket 16 is provided on the dust discharge pipe 14D side of the air cleaner 14. That is, the brackets 15 and 16 are spaced apart in the axial direction of the casing 14A, and are fixed to the outer peripheral surface of the casing 14A by means such as welding.
  • one bracket 15 is formed by bending a thin strip-like plate in a substantially M shape, and the base end side is fixed to the outer peripheral surface of the casing 14A.
  • a pair of leg portions 15A and a connecting plate portion 15B which extends in the horizontal direction by connecting the distal end sides of the leg portions 15A are provided.
  • the middle portion in the longitudinal direction of the connection plate portion 15B is fixed to the outer peripheral surface of the casing 14A.
  • both end sides in the longitudinal direction of the connection plate portion 15B protrude outward in the radial direction from the casing 14A, and form flat front attachment surfaces 15C and rear attachment surfaces 15D separated in the front and rear directions.
  • a threaded portion insertion hole 15C1 is bored in the central portion of the front mounting surface 15C, and a threaded portion 32B1 of a bolt 32 described later is inserted through the threaded portion insertion hole 15C1.
  • a threaded portion insertion hole 15D1 is bored in the central portion of the rear mounting surface 15D, and a threaded portion 31B1 of a bolt 31 described later is inserted through the threaded portion insertion hole 15D1.
  • Nuts 15E are fixed to the back surfaces of the front and rear mounting surfaces 15C and 15D at positions opposite to the screw portion insertion holes 15C1 and 15D1 by means of welding or the like. Then, one bracket 15 is configured to be attached to the inner surface side of a left front upper surface cover 27 described later using bolts 31 and 32.
  • the other bracket 16 is a plate bent in a substantially M shape like the bracket 15 described above, and includes a pair of leg portions 16A, a connecting plate portion 16B, a front mounting surface 16C, and a rear mounting surface 16D. , And threaded portions insertion holes (not shown) respectively drilled in the front and rear mounting surfaces 16C and 16D, and nuts 16E fixed on the back sides of the front and rear mounting surfaces 16C and 16D, respectively. ing.
  • the engine 10, the heat exchange device 11, the hydraulic pump 12 and the like described above constitute a mounted device mounted on the swing frame 5, and the mounted device is configured to be covered by an exterior cover 17 described later.
  • Reference numeral 17 denotes an exterior cover provided on the swing frame 5 and located on the front side of the counterweight 6.
  • the exterior cover 17 accommodates mounted devices such as the engine 10, the heat exchange device 11, the hydraulic pump 12, the air cleaner 14 and the like on the inner surface side.
  • the exterior cover 17 is configured of a left side cover 18, a right side cover 19, and an upper surface cover 20 described later.
  • the left side cover 18 is provided openably and closably between the left end of the counterweight 6 and the cab 7, and the left side cover 18 covers the heat exchange device 11, the air cleaner 14, etc. from the left side. .
  • the front end portion of the left side cover 18 is rotatably supported by a support member provided on the turning frame 5 via a hinge mechanism (not shown), and the rear end side of the left side cover 18 is a counterweight It abuts on the front end of 6.
  • the right side cover 19 is provided openably and closably between the right end of the counterweight 6 and the fuel tank 9, and the right side cover 19 covers the engine 10, the hydraulic pump 12 and the like from the right side. .
  • the front end portion of the right side cover 19 is rotatably supported by a support member provided on the turning frame 5 via a hinge mechanism (not shown), and the rear end side of the right side cover 19 is a counterweight It abuts on the front end of 6.
  • the upper surface cover 20 extends left and right between the upper end portion of the left side surface cover 18 and the upper end portion of the right side surface cover 19, and the upper surface cover 20 covers mounting equipment such as the engine 10 from above. It is a thing.
  • the upper surface cover 20 includes a left rear upper surface cover 21 connected to the upper end portion of the left side surface cover 18 and a left front upper surface cover 27 described in the front of the left rear upper surface cover 21.
  • a right upper surface cover 22 connected to an upper end portion of the right side surface cover 19 and an intermediate upper surface cover 23 extending between the left front upper surface cover 27 and the hydraulic oil tank 8 in the left and right directions.
  • the left rear upper surface cover 21, the right upper surface cover 22, the middle upper surface cover 23, and the left front upper surface cover 27 are fixed to support members provided upright on the turning frame 5 using bolts (not shown).
  • the upper surface cover 20 is configured. In this case, at the central portion of the top cover 20, a rectangular work opening 24 surrounded by the left rear top cover 21, the left front top cover 27, the right top cover 22, and the middle top cover 23 is formed.
  • the work opening 24 allows an operator to enter and exit the exterior cover 17 when performing maintenance work on the mounted device such as the engine 10 or the like.
  • Reference numeral 25 denotes an engine cover as a prime mover cover.
  • the engine cover 25 is provided on the upper surface side of the upper surface cover 20 constituting the exterior cover 17 and covers the working opening 24 formed in the upper surface cover 20 so as to be openable and closable.
  • the engine cover 25 has a rectangular frame portion 25A disposed so as to surround the work opening 24, and a lid portion 25B for covering the upper end side of the frame portion 25A, and the lower end side is opened. It consists of a box.
  • a sealing material 25C made of an elastic material such as rubber or plastic is provided over the entire circumference.
  • the right end side of the engine cover 25 is attached via a hinge member 26 to a support member (not shown) supporting the right upper surface cover 20, and the left end side of the engine cover 25 is upward and downward centering on the hinge member 26 To rotate.
  • the seal material 25C provided at the lower end edge of the frame 25A abuts on the outer surface of the exterior cover 17 to open the work opening 24. It is configured to be closed.
  • the air cleaner 14 disposed on the inner surface side of the exterior cover 17 is attached to the inner surface side of the left front upper surface cover 27 using bolts 31 and 32 described later.
  • the seal material 25C of the engine cover 25 is It is necessary to prevent interference with the head 31A of the bolt 31.
  • the head 31A of the bolt 31 is recessed inward (air cleaner 14 side) than the outer surface (upper surface) of the left front upper surface cover 27.
  • the configuration of the left front upper surface cover 27 is described below.
  • reference numeral 27 denotes a left front upper surface cover which constitutes a part of the exterior cover 17 (upper surface cover 20).
  • An air cleaner 14 as an accessory component is attached to the inner surface side of the left front upper surface cover 27.
  • the left front upper surface cover 27 has a rectangular shape as a whole, and is formed in a flat plate shape having an outer surface (upper surface) 27A and an inner surface 27B.
  • the left front upper surface cover 27 is formed at a corner adjacent to the left rear upper surface cover 21 and the middle upper surface cover 23 with a rectangular notch 27C that forms a part of the work opening 24.
  • one bolt insertion hole 27D located in the vicinity of the notch 27C and three through holes 27E having a smaller hole diameter than the bolt insertion hole 27D are drilled.
  • one bolt insertion hole 27D is disposed at a portion of the engine cover 25 in contact with the seal member 25C when the engine cover 25 is in the closed position
  • the three through holes 27E are the engine cover It is disposed at a position where it can be viewed from the outside (a position not covered by the engine cover 25) even when the position 25 is in the closed position.
  • the bolt insertion hole 27D has a hole diameter through which the head 31A and the shaft 31B of the bolt 31 described later can be inserted.
  • the bolt insertion hole 27D is set to a hole diameter through which a fastening tool (not shown) such as a socket wrench engaged with the head 31A can be inserted in order to clamp the bolt 31.
  • the three through holes 27E have a hole diameter through which only the shaft portion 32B of another bolt 32 described later can be inserted.
  • a bolt head seat 28 described later is provided at a position corresponding to the bolt insertion hole 27D.
  • Spacers 30, which will be described later, are provided at positions corresponding to the three through holes 27E.
  • Reference numeral 28 denotes a bolt head seat provided on the inner surface 27B of the left front upper surface cover 27.
  • the bolt head support 28 is disposed at a position corresponding to the bolt insertion hole 27D, and receives a head 31A of a bolt 31 described later.
  • the bolt head seat 28 is fixed to the frame 28A having a U-shaped cross section formed by bending a rectangular steel plate or the like, and the frame 28A. It is comprised by the cylinder 28B.
  • the frame body 28A of the bolt head seat 28 extends upward while facing each other from the bottom surface 28A1 facing the inner surface 27B of the left front upper surface cover 27 at a constant distance, and both ends in the longitudinal direction of the bottom surface 28A1. And a pair of side surfaces 28A2. At a central portion of the bottom surface 28A1, a shaft portion insertion hole 28A3 into which the shaft portion 31B of the bolt 31 is inserted is bored.
  • the frame 28A is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2. Therefore, for example, even when rainwater or the like enters the inner surface 27B side of the left front upper surface cover 27 through the bolt insertion hole 27D, the rain water or the like is discharged to the outside through the space formed between the left front upper surface cover 27 and the frame 28A. can do.
  • the cylindrical body 28B of the bolt head seat 28 is a cylindrical body extending upward and downward, and the inner peripheral side thereof is a shaft insertion hole 28C through which the shaft 31B of the bolt 31 is inserted.
  • One end side (upper end side) of the cylindrical body 28B is fixed to the bottom surface 28A1 of the frame 28A by means of welding or the like, and the shaft insertion hole 28C is disposed coaxially with the shaft insertion hole 28A3 of the frame 28A.
  • the other end side (lower end side) of the cylindrical body 28B is configured to abut on the rear mounting surface 15D of the bracket 15 provided on the air cleaner 14.
  • each side surface 28A2 constituting the frame 28A of the bolt head seat 28 is fixed to the inner surface 27B of the left front upper surface cover 27 using a means such as welding.
  • the bolt head support 28 is disposed at a position corresponding to the bolt insertion hole 27D in the inner surface 27B of the left front upper surface cover 27.
  • a bolt head accommodation space 29 for accommodating the head 31A of the bolt 31 is formed between the inner surface 27B of the left front upper surface cover 27 and the bottom surface 28A1 of the frame 28A of the bolt head seat 28 There is.
  • the head 31 A and the shaft 31 B of the bolt 31 are inserted into the bolt insertion hole 27 D of the left front upper surface cover 27, and the shaft 31 B of the bolt 31 is
  • the head portion 31A of the bolt 31 abuts on the bottom surface 28A1 of the frame 28A by inserting the shaft portion insertion hole 28A3 provided in the frame 28A and the shaft portion insertion hole 28C of the cylinder 28B.
  • the head 31A of the bolt 31 can be accommodated in the bolt head accommodation space 29, and the head 31A can be prevented from protruding toward the outer surface 27A of the left front upper surface cover 27.
  • Reference numeral 30 denotes three spacers provided on the inner surface 27B of the left front upper surface cover 27, and the spacers 30 are disposed at positions corresponding to the three through holes 27E.
  • Each spacer 30 sets the upper and lower attachment positions of the air cleaner 14 with respect to the left front upper surface cover 27, and consists of a cylinder extending upward and downward, and the inner peripheral side thereof is formed of another bolt 32 described later. It has become the axial part penetration hole 30A in which the axial part 32B is penetrated.
  • each spacer 30 is fixed to the inner surface 27B of the left front upper surface cover 27 by means such as welding, and the shaft insertion hole 30A of the spacer 30 is a through hole formed in the left front upper surface cover 27 It is arranged coaxially with the hole 27E.
  • the other end portion (lower end portion) of each spacer 30 is disposed in the same plane as the lower end portion of the cylindrical body 28B constituting the bolt head receiving seat 28, and the front attachment surface of one bracket 15 provided on the air cleaner 14
  • the front and rear mounting surfaces 16C and 16D of the other bracket 16 abut on the front surface 15C and the other bracket 16 respectively.
  • reference numeral 31 denotes one bolt inserted through the bolt insertion hole 27D of the left front upper surface cover 27, the shaft portion insertion hole 28A3 of the bolt head receiving seat 28 and the cylindrical body 28B.
  • the bolt 31 is for attaching the rear mounting surface 15D, which is disposed at a position corresponding to the bolt insertion hole 27D of the left front upper surface cover 27 among the brackets 15 of the air cleaner 14, to the left front upper surface cover 27.
  • the bolt 31 is composed of a hexagonal head 31A and a shaft 31B extending downward from the head 31A, and a screw (male screw) 31B1 is provided on the lower end side of the shaft 31B. ing.
  • the shaft 31B of the bolt 31 is sequentially inserted into the bolt insertion hole 27D of the left front upper surface cover 27, the shaft insertion hole 28A3 of the bolt head seat 28, and the shaft insertion hole 28C of the cylindrical body 28B.
  • the screw portion 31B1 provided on the lower end side of the shaft portion 31B is inserted into a screw portion insertion hole 15D1 formed in the rear mounting surface 15D of the bracket 15, and screwed to a nut 15E fixed to the bracket 15.
  • the rear mounting surface 15D provided on the bracket 15 is attached to the left front upper surface cover 27 using the bolt 31.
  • the head 31A of the bolt 31 is accommodated in the bolt head accommodation space 29 formed between the bottom surface 28A1 of the frame 28A constituting the bolt head seat 28 and the inner surface 27B of the left front upper surface cover 27. Be done. For this reason, the head 31 ⁇ / b> A of the bolt 31 does not protrude toward the outer surface 27 ⁇ / b> A of the left front upper surface cover 27.
  • the length dimension Y is set to be larger than the length dimension X (Y> X).
  • the shank 31B of the bolt 31 is inserted through the shank insertion hole 28A3 of the bolt head seat 28 and the shank insertion hole 28A3 of the cylindrical body 28B.
  • the head 31A of the bolt 31 can be protruded upward from the outer surface 27A of the left front upper surface cover 27.
  • the operator can manually rotate the head 31A of the bolt 31 and screw the screw portion 31B1 into the nut 15E.
  • Reference numeral 32 denotes three other bolts other than the bolt 31. These other bolts 32 include a front mounting surface 15C of one bracket 15 and front and rear mounting surfaces 16C and 16D of the other bracket 16, It is attached to the front left upper cover 27.
  • the other bolt 32 is composed of a hexagonal head 32A, a shaft 32B, and a screw (male screw) 32B1.
  • the shaft 32B of the other bolt 32 is a shaft 31B of the bolt 31. It is formed longer than.
  • Shaft portions 32B of the three other bolts 32 are sequentially inserted through the through holes 27E of the left front upper surface cover 27 and the shaft portion insertion holes 30A of the respective spacers 30.
  • the screw portion 32B1 provided on the lower end side of the shaft portion 32B is a screw portion insertion hole 15C1 formed on the front mounting surface 15C of the bracket 15 and a screw portion insertion hole formed on the front mounting surface 16C of the bracket 16 (see FIG. (Not shown) and a threaded portion insertion hole (not shown) formed in the rear mounting surface 16D of the bracket 16 and screwed to the nuts 15E and 16E, respectively.
  • the front mounting surface 15C of the bracket 15 and the front and rear mounting surfaces 16C and 16D of the bracket 16 are attached to the left front upper surface cover 27 using other bolts 32.
  • the wheeled hydraulic excavator 1 has the above-described configuration, and the wheeled hydraulic excavator 1 operates the work site by driving the front wheel 2A and the rear wheel 2B provided on the lower traveling body 2. Drive on public roads etc.
  • the wheel type hydraulic shovel 1 performs excavation work of earth and sand, etc. using the work device 4 while turning the upper swing body 3 at the work site.
  • the engine cover 25 is rotated about the hinge member 26.
  • the work opening 24 formed in the upper surface cover 20 of the exterior cover 17 is opened, and the operator can enter inside the exterior cover 17 through the work opening 24.
  • the engine cover 25 is pivoted to the closed position.
  • the sealing material 25C provided on the lower end side of the engine cover 25 abuts on the outer surface of the top cover 20, and the work opening 24 can be reliably closed.
  • the air cleaner 14 is attached to the inner surface 27B side of the left front upper surface cover 27 constituting the upper surface cover 20 using the bolts 31 and 32, and the attachment position of the bolt 31 is closed as shown in FIGS. It coincides with the lower end of the engine cover 25 at which it is positioned. Therefore, it is necessary to prevent the seal material 25C attached to the lower end portion of the frame portion 25A from interfering with the head portion 31A of the bolt 31 and damaging it.
  • a bolt in which the head 31A and the shaft 31B of the bolt 31 are inserted into a portion of the left front upper surface cover 27 which contacts the frame 25A of the engine cover 25 in the closed position.
  • An insertion hole 27D is provided.
  • a shaft portion insertion hole 28A3 into which the shaft portion 31B of the bolt 31 is inserted.
  • a bolt head seat 28 is provided.
  • the shaft portion 31B of the bolt 31 and the bolt insertion hole of the left front upper surface cover 27 27D the shaft portion insertion hole 28A3 of the bolt head support 28 and the shaft portion insertion hole 28C of the cylindrical body 28B are sequentially inserted.
  • the cylinder 28B of the bolt head seat 28 is brought into contact with the rear mounting surface 15C of the bracket 15, and the threaded portion 31B1 of the bolt 31 is inserted into the threaded portion insertion hole 15D1 formed in the rear mounting surface 15D. .
  • the screw portion 31B1 is screwed (temporarily tightened) to the nut 15E fixed to the bracket 15.
  • a fastening tool such as a socket wrench is inserted into the bolt insertion hole 27D of the left front upper surface cover 27.
  • the fastening tool is engaged with the head 31A of the bolt 31, and the threaded portion 31B1 of the bolt 31 is tightened into the nut 15E using the fastening tool.
  • the rear attachment surface 15D provided on one of the brackets 15 can be attached to the inner surface 27B of the left front upper surface cover 27 using the bolt 31.
  • the head 31A of the bolt 31 is a bolt head formed between the bottom surface 28A1 of the frame 28A constituting the bolt head seat 28 and the inner surface 27B of the left front upper surface cover 27. It is accommodated in the part accommodation space 29.
  • the head 31A of the bolt 31 is concealed in the bolt head accommodation space 29, and it is possible to suppress the protrusion on the outer surface 27A side of the left front upper surface cover 27.
  • the seal member 25C of the engine cover 25 in the closed position can be reliably prevented from interfering with the head 31A of the bolt 31 and being damaged.
  • the frame 28A of the bolt head seat 28 fixed to the inner surface 27B of the left front upper surface cover 27 is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2. Therefore, for example, even when rainwater or the like enters the inner surface 27B side of the left front upper surface cover 27 through the bolt insertion hole 27D, the rain water or the like is discharged to the outside through the space formed between the left front upper surface cover 27 and the frame 28A. can do. As a result, rainwater and the like are prevented from staying in the bolt head housing space 29 between the left front upper surface cover 27 and the bolt head seat 28, and the head of the bolt 31 housed in the bolt head housing space 29. Corrosion of the portion 31A can be prevented.
  • the length dimension Y of the shaft portion 31B of the bolt 31 is such that the cylinder 28B of the bolt head seat 28 is in contact with the rear mounting surface 15D of the bracket 15.
  • the dimension is set to be larger than the length dimension X from the outer surface 27A of the upper surface cover 27 to the boundary between the screw portion insertion hole 15D1 of the rear attachment surface 15D and the nut 15E.
  • screwing is performed on the nut 15E fixed to the bracket 15 and the nut 16E fixed to the bracket 16.
  • the front mounting surface 15C of the bracket 15 and the front and rear mounting surfaces 16C and 16D of the bracket 16 can be attached to the left front upper surface cover 27 using the other bolts 32.
  • the heads 32 ⁇ / b> A of the other bolts 32 project on the outer surface 27 ⁇ / b> A side of the left front upper surface cover 27.
  • the head 32A of the other bolt 32 is disposed at a position away from the lower end of the engine cover 25 in the closed position, the head 32A of the other bolt 32 is a seal 25C of the engine cover 25. Will not interfere with
  • the bolt insertion hole 27D is provided in the portion of the engine cover 25 in contact with the seal member 25C.
  • a bolt head seat 28 is provided at a position corresponding to the bolt insertion hole 27D. Therefore, when attaching the air cleaner 14 to the inner surface 27B side of the left front upper surface cover 27 using the bolts 31, 32, the head 31A of the bolt 31 is formed between the left front upper surface cover 27 and the bolt head seat 28 It can be accommodated in the bolt head accommodation space 29.
  • the head 31 ⁇ / b> A of the bolt 31 is concealed in the bolt head accommodation space 29, and the projection on the outer surface 27 ⁇ / b> A side of the left front upper surface cover 27 can be reliably suppressed. Therefore, when the engine cover 25 is in the closed position, it is possible to prevent the seal 25C of the engine cover 25 from interfering with the head 31A of the bolt 31 and damaging it.
  • the head of one bolt 31 among the four bolts for attaching the air cleaner 14 to the left front upper surface cover 27 is provided with the one bolt head seat 28 on the left front upper surface cover 27.
  • the case where only 31A is accommodated in the bolt head accommodation space 29 between the left front upper surface cover 27 and the bolt head seat 28 is illustrated.
  • the present invention is not limited to this, and for example, the left front upper surface cover 27 is provided with four bolt head receptacles 28, and the head 31A of the bolt 31 and the heads 32A of three other bolts 32. May be accommodated in the bolt head accommodation space 29 between the left front upper surface cover 27 and each bolt head seat 28.
  • the air cleaner 14 is illustrated as an accessory component disposed on the inner surface side of the exterior cover 17, but the present invention is not limited thereto.
  • intake piping, fuel filter, engine oil filter, reserve tank, A tool box or the like may be applied.
  • the frame 28A of the bolt head seat 28 is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2 is illustrated.
  • the present invention is not limited to this, and for example, the bolt head receiving seat may be configured by a bottomed cylindrical frame.
  • the bolt insertion hole 27D is provided at a position in contact with the seal member 25C of the engine cover 25, but the bolt insertion hole 27D may be provided inside the seal member 25C. That is, the bolt insertion hole 27D may be disposed at a position closed by the engine cover 25 in the closed position.
  • the wheel type hydraulic shovel 1 provided with the front wheel 2A and the rear wheel 2B as a construction machine is described as an example.
  • the present invention is not limited to this, and may be applied to, for example, a hydraulic shovel provided with a crawler type lower traveling body, and further widely applied to other construction machines such as a hydraulic crane and a wheel loader. Can.
  • One-wheel hydraulic excavator (construction machine) 2 Lower body (body) 3 Upper revolving body (car body) 10 engine (motor) 14 Air cleaner (accessory parts) 15, 16 Brackets 15E, 16E Nuts 17 Exterior Cover 24 Working Opening 25 Engine Cover (Motor Motor Cover) 25A Frame portion 25B Cover portion 25C Sealing material 27 Left front upper surface cover 27A Outer surface 27B Inner surface 27D Bolt insertion hole 27E Through hole 28 Bolt head seat 28A Frame body 28A3 Shaft portion insertion hole 28B Tube body 29 bolt head accommodation space 31 bolt 31A , 32A Head 31B, 32B Shaft 31B1, 32B1 Thread 32 Other bolt

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Abstract

In the present invention, in an exterior cover (17), bolt passage holes (27D) are provided through which are passed the heads (31A) and shafts (31B) of bolts (31) for attaching an air cleaner (14). At the inner surface (27B) side of the exterior cover (17), bolt head receiving seats (28) are provided that receive the heads (31A) of bolts (31) and have shaft passage holes (28A3) through which the shafts (31B) of the bolts (31) are passed. The air cleaner (14) is attached to the inner surface (27B) side of the exterior cover (17) by means of bolts (31) passed through the shaft passage holes (28A3) of the bolt head receiving seats (28) and the shaft passage holes (28C) of a tube body (28B). The heads (31A) of the bolts (31) are housed within bolt head housing spaces (29) formed at the bolt head receiving seats (28).

Description

建設機械Construction machinery
　本発明は、例えば油圧ショベル、ホイール式油圧ショベル、油圧クレーン等の建設機械に関し、特に車体に搭載された原動機、油圧ポンプ等の搭載機器を覆う外装カバーを備えた建設機械に関する。 The present invention relates to a construction machine such as a hydraulic shovel, a wheel type hydraulic shovel, or a hydraulic crane, and more particularly, to a construction machine provided with an exterior cover that covers mounted devices such as a motor mounted on a vehicle body and a hydraulic pump.
　一般に、建設機械の代表例としての油圧ショベルは、自走可能な下部走行体と、該下部走行体上に旋回可能に搭載された上部旋回体とにより車体が構成され、上部旋回体の前部側には掘削作業等を行う作業装置が俯仰動可能に設けられている。油圧ショベルは、下部走行体によって作業現場まで自走し、作業装置を用いて土砂の掘削作業等を行うものである。 In general, a hydraulic excavator as a representative example of a construction machine has a vehicle body constituted by a self-propelled lower traveling body and an upper revolving body rotatably mounted on the lower traveling body, and a front portion of the upper revolving body On the side, a working device for carrying out a digging operation and the like is provided so as to be capable of raising and lowering. The hydraulic shovel is self-propelled to the work site by the lower traveling body, and performs excavation work of soil and the like using the work device.
　油圧ショベルの上部旋回体は、下部走行体上に旋回可能に設けられた支持構造体をなす旋回フレームと、旋回フレームの前部左側に配設され運転室を画成するキャブと、旋回フレームの後端側に設けられ作業装置との重量バランスをとるカウンタウエイトと、該カウンタウエイトの前側に位置して旋回フレーム上に搭載されたエンジンを含む搭載機器と、該搭載機器を覆ってカウンタウエイトの前側に配置された外装カバーとにより大略構成されている。 The upper swing body of the hydraulic shovel includes a swing frame forming a support structure swingably provided on the lower traveling body, a cab disposed on the front left side of the swing frame and defining a cab, and a swing frame A counterweight provided on the rear end side to balance the weight with the working device, a mounted device including an engine mounted on the swing frame and located on the front side of the counterweight, and covering the mounted device to It is roughly configured by an exterior cover disposed on the front side.
　ここで、旋回フレームに搭載される搭載機器は、エンジンと、該エンジンによって駆動され油圧アクチュエータに向けて作動用の圧油を供給する油圧ポンプと、ラジエータ、オイルクーラ等からなる熱交換装置とを含んで構成されている。 Here, the mounted device mounted on the swing frame includes an engine, a hydraulic pump driven by the engine and supplying hydraulic fluid for operation toward the hydraulic actuator, and a heat exchange device including a radiator, an oil cooler, etc. It is comprised including.
　一方、外装カバーは、エンジン、油圧ポンプ、熱交換装置等の搭載機器を覆うもので、搭載機器を上方から覆う上面カバーと、搭載機器を左側方から開，閉可能に覆う左側面ドアカバーと、搭載機器を右側方から開，閉可能に覆う右側面ドアカバーとにより構成されている。また、外装カバーの上面側には、通常、エンジンの上方を開，閉可能に覆うエンジンカバーが設けられている。 On the other hand, the exterior cover covers the mounted devices such as the engine, hydraulic pump, heat exchange device, etc., and an upper surface cover which covers the mounted devices from above, and a left side door cover which covers the mounted devices openably and closably from the left The right side door cover covers the mounted device so as to be openable and closable from the right side. Also, on the upper surface side of the exterior cover, an engine cover is generally provided that covers the upper side of the engine so as to be openable and closable.
　一方、外装カバーの内面側には、搭載機器の一部を構成する付属部品が配置されている。この付属部品の代表例として、エンジンの吸気を清浄化するためのエアクリーナが知られている。また、付属部品としてのエアクリーナを、外装カバーの内面側にボルトを用いて取付ける構成とした油圧ショベルが知られている。 On the other hand, on the inner surface side of the exterior cover, accessory parts that constitute a part of the mounted device are disposed. An air cleaner for cleaning the intake air of the engine is known as a representative example of this accessory. There is also known a hydraulic shovel configured to attach an air cleaner as an accessory component to the inner surface side of an exterior cover using a bolt.
　この油圧ショベルは、外装カバーの内面に筒状のスペーサを固着し、外装カバーの外面側からスペーサの内周側に挿通したボルトをエアクリーナに螺着している。これにより、外装カバーの内面側には、ボルトを用いてエアクリーナが取付けられている。このため、外装カバーの外面側には、エアクリーナを取付ける複数のボルトの頭部が突出するようになる（特許文献１）。 In this hydraulic shovel, a cylindrical spacer is fixed to the inner surface of the outer cover, and a bolt inserted from the outer surface side of the outer cover to the inner peripheral side of the spacer is screwed to the air cleaner. Thereby, the air cleaner is attached to the inner surface side of the exterior cover using a bolt. For this reason, the heads of a plurality of bolts for attaching the air cleaner are projected on the outer surface side of the exterior cover (Patent Document 1).
　これに対し、外装カバー上に開，閉可能に設けられるエンジンカバーの下端縁には、通常、エンジンカバーと外装カバーとの間の隙間を閉塞するため、ゴム等の弾性材料からなるシール材が全周に亘って取付けられている。 On the other hand, at the lower end edge of the engine cover provided openably and closably on the exterior cover, a sealing material made of an elastic material such as rubber is usually used to close the gap between the engine cover and the exterior cover. It is attached over the entire circumference.
　このため、エンジンカバーを閉位置としたときに、エンジンカバーの下端縁に設けられたシール材が、外装カバーの外面に突出したボルトの頭部に接触した場合には、シール材が損傷してしまうという不具合がある。 For this reason, when the seal member provided at the lower end edge of the engine cover contacts the head of the bolt projecting to the outer surface of the outer cover when the engine cover is in the closed position, the seal material is damaged. There is a defect that
　一方、産業車両の車体の下面側にボルトを用いてアンダカバーを取付けるカバー取付構造が提案されている。このカバー取付構造は、車体のフレームにボルトの頭部よりも大径な貫通孔を穿設すると共に、この貫通孔内に、ボルトの頭部が収容される窪み部が形成されたプレートを固定している。このカバー取付構造では、プレートの窪み部内にボルトの頭部を収容した状態で、このボルトを用いて車体のフレームにアンダカバーを取付けることができる。 On the other hand, there has been proposed a cover mounting structure for mounting an undercover using bolts on the lower surface side of a vehicle body of an industrial vehicle. In this cover mounting structure, a through hole having a diameter larger than the head of the bolt is formed in the frame of the vehicle body, and a plate in which a recessed portion in which the head of the bolt is accommodated is fixed in the through hole. doing. In this cover attachment structure, the undercover can be attached to the frame of the vehicle body using the bolt while the head of the bolt is accommodated in the recess of the plate.
　これにより、車体のフレームにアンダカバーを取付けるボルトの頭部は、プレートの窪み部を介してフレームの貫通孔内に収容されるので、例えば産業車両の走行時にボルトの頭部が地面に接触したり、飛石がボルトの頭部に衝突するのを抑え、ボルトを保護することができる（例えば、特許文献２）。 Thus, the head of the bolt for attaching the undercover to the frame of the vehicle body is accommodated in the through hole of the frame through the depression of the plate, so that, for example, the head of the bolt contacts the ground when the industrial vehicle travels. Also, it is possible to protect the bolt by suppressing the impact of flying stones on the head of the bolt (for example, Patent Document 2).
特開平８－１８３３５０号公報Japanese Patent Application Laid-Open No. 8-183350 特開２０００－４３７５９号公報JP 2000-43759 A
　特許文献２の従来技術においては、車体のフレームが大きな板厚を有している。このため、アンダカバーを取付けるボルトの頭部は、フレームに設けた貫通孔内に収容することができる。 In the prior art of Patent Document 2, the frame of the vehicle body has a large thickness. For this reason, the head of the bolt which attaches an undercover can be accommodated in the through-hole provided in the flame | frame.
　しかし、油圧ショベルの外装カバーは、薄肉な鋼板等を用いて形成されるので、外装カバーの板厚は、通常、外装カバーにエアクリーナを取付けるボルトの頭部の厚さ寸法よりも小さくなる。この結果、外装カバーの外面からボルトの頭部が突出してしまい、エンジンカバーの下端縁に設けたシール材が、ボルトの頭部に接触して損傷するという問題がある。 However, since the exterior cover of the hydraulic shovel is formed using a thin steel plate or the like, the thickness of the exterior cover is usually smaller than the thickness dimension of the head of a bolt for attaching an air cleaner to the exterior cover. As a result, the head of the bolt protrudes from the outer surface of the exterior cover, and there is a problem that the seal material provided at the lower end edge of the engine cover contacts the head of the bolt and is damaged.
　本発明は上述した従来技術の問題に鑑みなされたもので、外装カバーにボルトを用いて付属部品を取付ける場合に、このボルトの頭部が外装カバーの外面側に突出するのを抑えることができるようにした建設機械を提供することを目的としている。 The present invention has been made in view of the above-described problems of the prior art, and when attaching an accessory to the exterior cover using a bolt, it is possible to suppress that the head of the bolt protrudes to the outer surface side of the exterior cover. The purpose is to provide construction equipment that
　（１）．上述した課題を解決するため本発明は、自走可能な車体と、該車体に搭載された原動機を含む搭載機器と、該搭載機器を覆って前記車体に設けられた外装カバーと、該外装カバーの内面側に位置して配置され前記搭載機器の一部を構成する付属部品とを備えてなる建設機械に適用される。 (1). In order to solve the problems described above, the present invention provides a self-propelled vehicle body, a mounted device including a motor mounted on the vehicle body, an exterior cover provided on the vehicle body to cover the mounted device, and an exterior cover The present invention is applied to a construction machine provided with an accessory component which is disposed on the inner surface side of and which constitutes a part of the mounting device.
　本発明の特徴は、前記外装カバーには、前記付属部品を取付けるボルトの頭部と軸部が挿通されるボルト挿通孔を設け、前記外装カバーの内面側には、該ボルト挿通孔に対応した位置に配置され前記ボルトの軸部が挿通される軸部挿通孔を有すると共に前記ボルトの頭部を受けるボルト頭部受け座を設け、該ボルト頭部受け座と前記外装カバーとの間には、前記ボルトの頭部を収容するボルト頭部収容空間を形成し、前記付属部品は、前記ボルト挿通孔を介して前記ボルト頭部受け座の軸部挿通孔に挿通された前記ボルトを用いて前記外装カバーの内面側に取付ける構成とし、前記ボルトを用いて前記付属部品を取付けた状態では、前記ボルトの頭部は前記ボルト頭部収容空間内に収容される構成としたことにある。 A feature of the present invention is that the exterior cover is provided with a bolt insertion hole through which the head and shaft of a bolt for attaching the accessory are inserted, and the inner surface of the exterior cover corresponds to the bolt insertion hole A bolt head receiving seat is provided which is disposed at a position and into which the shaft portion of the bolt is inserted, and a bolt head receiving seat for receiving the head of the bolt is provided, and between the bolt head receiving seat and the exterior cover Forming a bolt head housing space for housing the head portion of the bolt, and using the bolt inserted into the shaft insertion hole of the bolt head support through the bolt insertion hole. It is configured to be attached to the inner surface side of the exterior cover, and in a state where the accessory is attached using the bolt, the head of the bolt is accommodated in the bolt head accommodation space.
　この構成によれば、外装カバーの内面側にボルトを用いて付属部品を取付ける場合には、外装カバーに設けたボルト挿通孔に、ボルトの軸部と頭部とを挿通した後、ボルト頭部受け座に設けた軸部挿通孔にボルトの軸部を挿通する。これにより、ボルトの頭部がボルト頭部受け座によって受止められ、ボルトの軸部は付属部品に螺着される。これにより、外装カバーの内面側に付属部品を取付けることができる。 According to this configuration, when attaching the accessory using the bolt on the inner surface side of the exterior cover, after inserting the shaft portion and the head of the bolt into the bolt insertion hole provided in the exterior cover, the bolt head The shaft of the bolt is inserted into the shaft insertion hole provided in the receiving seat. The bolt head is thereby received by the bolt head seat and the bolt shank is screwed onto the attachment. Thereby, an attachment part can be attached to the inner surface side of an exterior cover.
　この場合、ボルトの頭部は、外装カバーとボルト頭部受け座との間に形成されたボルト頭部収容空間内に収容されるので、ボルトの頭部が外装カバーの外面側に突出するのを確実に抑えることができる。この結果、外装カバーの外面側に配置された部材が、ボルトの頭部に干渉して破損するのを確実に抑えることができる。 In this case, since the bolt head is accommodated in the bolt head receiving space formed between the outer cover and the bolt head seat, the bolt head protrudes to the outer surface side of the outer cover. Can be reliably suppressed. As a result, the member disposed on the outer surface side of the exterior cover can be reliably restrained from interfering with the head of the bolt and breaking.
　（２）．本発明によると、前記外装カバーの上面側には、前記原動機の上方を開，閉可能に覆い閉位置となったときに前記外装カバーの上面に当接する原動機カバーを設け、前記ボルト挿通孔は、前記原動機カバーが閉位置となって前記外装カバーに対して前記原動機カバーが当接したとき、前記原動機カバーによって閉塞される部位に設ける構成としている。 (2). According to the present invention, the upper surface side of the exterior cover is provided with a prime mover cover that comes in contact with the upper surface of the exterior cover when the upper position of the prime mover is open and closed so as to be closed. When the motor cover is in the closed position and the motor cover is in contact with the exterior cover, the motor cover is provided at a portion closed by the motor cover.
　この構成によれば、原動機カバーが閉位置となったときに、ボルト挿通孔が原動機カバーによって閉塞されても、ボルトの頭部は、ボルト頭部収容空間内に隠蔽される。これにより、原動機カバーがボルトの頭部に接触するのを回避することができ、原動機カバーを保護することができる。 According to this configuration, when the prime mover cover is in the closed position, the head of the bolt is concealed in the bolt head accommodation space even if the bolt insertion hole is closed by the prime mover cover. This can prevent the prime mover cover from contacting the head of the bolt and protect the prime mover cover.
　（３）．本発明によると、前記原動機カバーは、前記外装カバーの上面カバーに設けられた作業用開口を取囲む枠部と、該枠部の上端側を施蓋する蓋部とにより構成され、前記枠部の下端縁には全周に亘ってシール材を設け、前記ボルト挿通孔は、前記シール材に当接する位置に設ける構成としている。 (3). According to the present invention, the prime mover cover is constituted by a frame portion surrounding a working opening provided in the upper surface cover of the exterior cover, and a lid portion covering the upper end side of the frame portion, and the frame portion A sealing material is provided on the entire lower end edge of the bolt, and the bolt insertion hole is provided at a position in contact with the sealing material.
　この構成によれば、原動機カバーを閉位置として枠体の下端縁に設けられたシール材を上面カバーに当接させた場合でも、このシール材がボルトの頭部に接触して損傷することがなく、シール材を保護することができる。 According to this configuration, even when the seal material provided at the lower end edge of the frame is brought into contact with the upper surface cover with the prime mover cover in the closed position, the seal material may be damaged by contacting the head of the bolt. It is possible to protect the sealing material.
　（４）．本発明によると、前記外装カバーには、前記ボルト挿通孔の近傍で、かつ前記原動機カバーが閉位置となったときにも外部から目視し得る位置に、他のボルトの軸部が挿通される貫通孔を設け、前記付属部品は、前記ボルトと前記貫通孔に挿通された前記他のボルトとを用いて前記外装カバーの内面側に取付ける構成としている。 (4). According to the present invention, the shaft portion of another bolt is inserted into the exterior cover in the vicinity of the bolt insertion hole and at a position visible from the outside even when the motor cover is in the closed position. A through hole is provided, and the accessory is attached to the inner surface side of the exterior cover using the bolt and the other bolt inserted into the through hole.
　この構成によれば、外装カバーのボルト挿通孔を介してボルト頭部受け座の軸部挿通孔に挿通されたボルトと、外装カバーの貫通孔に挿通された他のボルトとを用いることにより、外装カバーに対して付属部品を確実に取付けることができる。 According to this configuration, the bolt inserted into the shaft insertion hole of the bolt head seat through the bolt insertion hole of the exterior cover and the other bolt inserted into the through hole of the exterior cover Accessories can be attached securely to the exterior cover.
　（５）．本発明によると、前記ボルト頭部受け座は、前記外装カバーの内面と間隔をもって対面し前記軸部挿通孔が穿設された底面と該底面から前記外装カバーに向けて突出し突出端部が前記外装カバーの内面に固着された側面とを有する断面Ｕ字型の枠体と、一端側が該枠体の底面に固着されると共に他端側が前記付属部品に当接し前記ボルトの軸部が挿通される軸部挿通孔を有する筒体とにより構成している。 (5). According to the present invention, the bolt head seat is opposed to the inner surface of the outer cover with a gap, and the bottom surface on which the shaft insertion hole is bored and the protruding end portion protrudes from the bottom toward the outer cover A frame with a U-shaped cross section having a side surface fixed to the inner surface of the exterior cover, one end side is fixed to the bottom surface of the frame, the other end side is in contact with the accessory, and the shaft of the bolt is inserted It comprises with the cylinder which has the axial part penetration hole.
　この構成によれば、外装カバーのボルト挿通孔に挿通したボルトの軸部は、ボルト頭部受け座の枠体と筒体とに挿通された後、付属部品に螺着される。従って、付属部品を筒体の他端側に当接させた状態で、この付属部品をボルトを用いて外装カバーの内面側に確実に締結することができる。 According to this configuration, the shaft portion of the bolt inserted into the bolt insertion hole of the exterior cover is screwed into the accessory after being inserted into the frame and the cylinder of the bolt head seat. Therefore, in the state where the attachment is in contact with the other end side of the cylinder, the attachment can be securely fastened to the inner surface of the exterior cover using a bolt.
　この場合、ボルト頭部受け座の枠体は、底面と側面とにより断面Ｕ字型に形成されているので、例えば雨水等がボルト挿通孔を通じて外装カバーの内面側に浸入した場合でも、この雨水を外装カバーと枠体との間に形成された空間を通じて外部に排出することができる。従って、外装カバーとボルト頭部受け座との間のボルト頭部収容空間内に雨水等が滞留するのを抑え、このボルト頭部収容空間に収容されたボルトの頭部が腐食するのを防止することができる。 In this case, since the frame of the bolt head seat is formed in a U-shaped cross section by the bottom and the side, for example, even when rainwater or the like infiltrates the inner surface side of the exterior cover through the bolt insertion hole, this rainwater Can be discharged to the outside through the space formed between the exterior cover and the frame. Therefore, it is suppressed that rain water etc. stay in the bolt head accommodation space between the exterior cover and the bolt head seat, and corrosion of the bolt head accommodated in the bolt head accommodation space is prevented. can do.
　（６）．本発明によると、前記付属部品には、前記ボルトの軸部に螺設されたねじ部が挿通されるねじ部挿通孔を設けると共に、該ねじ部挿通孔と対向する位置に前記ボルトのねじ部を螺着するためのナットを取付け、前記ボルト頭部受け座の筒体を前記付属部品に当接させた状態で、前記外装カバーの外面から前記付属部品のねじ部挿通孔と前記ナットとの境界部までの長さ寸法をＸとし、前記ボルト頭部受け座を通じて前記ナットに螺着される前記ボルトの軸部の長さ寸法をＹとすると、前記長さ寸法Ｙは前記長さ寸法Ｘよりも大きく設定している。 (6). According to the present invention, the accessory component is provided with a screw portion insertion hole through which a screw portion screwed to the shaft portion of the bolt is inserted, and a screw portion of the bolt is disposed at a position facing the screw portion insertion hole. With the nut for screwing in, and with the cylindrical body of the bolt head support in contact with the accessory, from the outer surface of the exterior cover, the screw insertion hole of the accessory and the nut Assuming that the length to the boundary is X and the length of the shaft of the bolt screwed to the nut through the bolt head seat is Y, the length Y is the length X It is set larger than.
　この構成によれば、ボルト頭部受け座の筒体を付属部品に当接させた状態で、ボルト頭部受け座の軸部挿通孔にボルトの軸部を挿通し、該ボルトの軸部に螺設されたねじ部を、付属部品に取付けられたナットに仮締めしたときに、ボルトの頭部を外装カバーの外面から適宜に突出させることができる。この結果、外装カバーの内面側にボルトを用いて付属部品を取付けるときに、ボルトの位置決め作業や仮締め作業を容易に行うことができ、付属部品を取付けるときの作業性を高めることができる。 According to this configuration, the shaft portion of the bolt is inserted through the shaft insertion hole of the bolt head seat in a state where the cylinder of the bolt head seat is in contact with the accessory, and the shaft portion of the bolt is When the threaded screw portion is temporarily tightened to a nut attached to the accessory, the head of the bolt can be properly protruded from the outer surface of the exterior cover. As a result, when attaching the attachment using the bolt on the inner surface side of the outer cover, positioning operation and temporary tightening operation of the bolt can be easily performed, and workability when attaching the attachment can be enhanced.
　(７)．本発明によると、前記搭載機器は、前記原動機としてのエンジンと、前記エンジンに供給される空気中のダストを除去するエアクリーナとを含んで構成され、前記付属部品は、前記搭載機器の一部を構成する前記エアクリーナとしている。 (7). According to the present invention, the mounted device includes an engine as the prime mover and an air cleaner for removing dust in the air supplied to the engine, and the accessory component includes a part of the mounted device. It is set as the said air cleaner to comprise.
　この構成によれば、エアクリーナを、原動機カバーの近傍でボルトを用いて外装カバーに取付けた場合でも、ボルトの頭部を外装カバーの内面側に引っ込めることにより、原動機カバーの一部がボルトの頭部に干渉するのを抑えることができる。 According to this configuration, even when the air cleaner is attached to the exterior cover using the bolt in the vicinity of the prime mover cover, part of the prime mover cover is the bolt head by retracting the head of the bolt to the inner surface side of the exterior cover. It is possible to suppress interference with the department.
本発明の実施の形態によるホイール式油圧ショベルを示す正面図である。1 is a front view showing a wheeled hydraulic excavator according to an embodiment of the present invention. ホイール式油圧ショベルの上部旋回体を示す平面図である。It is a top view which shows the upper revolving superstructure of a wheel type hydraulic shovel. 左前上面カバー、左後上面カバー、エアクリーナ等をエンジンカバーを閉位置とした状態で示す要部拡大の斜視図である。It is a perspective view of the principal part expansion which shows a left front upper surface cover, a left rear upper surface cover, an air cleaner, etc. in the state which made the engine cover a closed position. 図３中の左前上面カバー、左後上面カバー、エアクリーナ等をエンジンカバーを開位置とした状態で示す斜視図である。FIG. 4 is a perspective view showing a left front upper surface cover, a left rear upper surface cover, an air cleaner, etc. in FIG. 3 with the engine cover in an open position. 左前上面カバーを単体で示す斜視図である。It is a perspective view which shows left front upper surface cover alone. 左前上面カバー、ボルト挿通孔、ボルト頭部受け座、エアクリーナ、ボルト等を左前上面カバーの斜め下側からみた分解斜視図である。It is the disassembled perspective view which saw the left front upper surface cover, a bolt insertion hole, a bolt head seat, an air cleaner, a bolt, etc. from the diagonal lower side of the left front upper surface cover. 左前上面カバー、ボルト頭部受け座、エアクリーナ、ボルト等を図２中の矢示VII－VII方向からみた断面図である。FIG. 3 is a cross-sectional view of a left front upper surface cover, a bolt head seat, an air cleaner, a bolt and the like as viewed in the direction of arrows VII-VII in FIG. 2; 左前上面カバー、ボルト挿通孔、ボルト頭部受け座、エアクリーナ、ボルト、ナット等を図７中の矢示VIII－VIII方向からみた断面図である。FIG. 8 is a cross-sectional view of a left front upper surface cover, a bolt insertion hole, a bolt head seat, an air cleaner, a bolt, a nut and the like as viewed in the direction of arrows VIII-VIII in FIG. 7; 左前上面カバーの外面からエアクリーナに設けたナットまでの長さ寸法と、ボルトの軸部の長さ寸法との関係を示す図８と同様位置の断面図である。It is sectional drawing of the position similar to FIG. 8 which shows the relationship between the length dimension from the outer surface of a left front upper surface cover to the nut provided in the air cleaner, and the length dimension of the axial part of a bolt. ボルト頭部受け座の軸部挿通孔に挿通したボルトを、ナットに仮締めした状態を示す図８と同様位置の断面図である。It is sectional drawing of the position similar to FIG. 8 which shows the state which temporarily tightened the bolt penetrated to the axial part penetration hole of a bolt head bearing to a nut.
　以下、本発明に係る建設機械の実施の形態を、ホイール式油圧ショベルに適用した場合を例に挙げ、図１ないし図１０を参照しつつ詳細に説明する。 Hereinafter, the embodiment of the construction machine according to the present invention will be described in detail with reference to FIGS. 1 to 10 by taking a case where the invention is applied to a wheeled hydraulic shovel as an example.
　図中、１は建設機械の代表例としてのホイール式油圧ショベルを示している。このホイール式油圧ショベル１は、左，右の前輪２Ａおよび左，右の後輪２Ｂを有するホイール式の下部走行体２と、該下部走行体２上に旋回可能に搭載された上部旋回体３とにより構成されている。ここで、下部走行体２と上部旋回体３は、本発明によるホイール式油圧ショベル１の車体を構成している。 In the figure, 1 indicates a wheeled hydraulic shovel as a representative example of a construction machine. The wheeled hydraulic excavator 1 includes a wheeled lower traveling body 2 having left and right front wheels 2A and left and right rear wheels 2B, and an upper revolving structure 3 rotatably mounted on the lower traveling body 2. And consists of. Here, the lower traveling body 2 and the upper swing body 3 constitute the vehicle body of the wheeled hydraulic excavator 1 according to the present invention.
　上部旋回体３の前部側には作業装置４が俯仰動可能に設けられ、この作業装置４は、ブーム４Ａ、アーム４Ｂ、バケット４Ｃ、ブームシリンダ４Ｄ、アームシリンダ４Ｅ、バケットシリンダ４Ｆ等からなっている。ホイール式油圧ショベル１は、下部走行体２によって公道等を走行し、作業現場において上部旋回体３を旋回させつつ、作業装置４を用いて土砂の掘削作業等を行う。 A working device 4 is provided on the front side of the upper revolving superstructure 3 so as to be capable of raising and lowering. The working device 4 comprises a boom 4A, an arm 4B, a bucket 4C, a boom cylinder 4D, an arm cylinder 4E, a bucket cylinder 4F, etc. ing. The wheeled hydraulic excavator 1 travels on a public road or the like by the lower traveling body 2 and performs excavating work and the like of earth and sand using the work device 4 while turning the upper swing body 3 at the work site.
　一方、ホイール式油圧ショベル１の上部旋回体３は、後述する旋回フレーム５と、カウンタウエイト６と、キャブ７と、エンジン１０と、熱交換装置１１と、油圧ポンプ１２と、外装カバー１７と、エンジンカバー２５とにより大略構成されている。 On the other hand, the upper swing body 3 of the wheeled hydraulic excavator 1 includes a swing frame 5, a counterweight 6, a cab 7, an engine 10, a heat exchange device 11, a hydraulic pump 12 and an exterior cover 17 described later. It is roughly configured by the engine cover 25.
　旋回フレーム５は、上部旋回体３のベースとなるもので、該旋回フレーム５は強固な支持構造体をなしている。ここで、旋回フレーム５は、左，右方向の中央部に配置され前，後方向に延びる底板５Ａと、該底板５Ａ上に立設され左，右方向で対面しつつ前，後方向に延びる左縦板５Ｂ，右縦板５Ｃとを備えている。左，右の縦板５Ｂ，５Ｃの前端側には、作業装置４を構成するブーム４Ａの基端部（フート部）が回動可能に取付けられ、左，右の縦板５Ｂ，５Ｃの後端側にはカウンタウエイト６が取付けられている。 The pivoting frame 5 is the base of the upper pivoting body 3 and the pivoting frame 5 forms a rigid support structure. Here, the pivot frame 5 is disposed at the central portion in the left and right directions, and extends in the front and rear directions, and the base plate 5A is erected on the bottom plate 5A and extends in the front and rear directions while facing in the left and right directions. A left vertical plate 5B and a right vertical plate 5C are provided. At the front end side of the left and right vertical plates 5B, 5C, the base end (foot portion) of the boom 4A constituting the working device 4 is rotatably attached, and after the left, right vertical plates 5B, 5C A counterweight 6 is attached to the end.
　カウンタウエイト６は、旋回フレーム５の後端側に搭載され、該カウンタウエイト６は、作業装置４との重量バランスをとるものである。ここで、ホイール式油圧ショベル１は公道を走行するため、上部旋回体３の旋回半径、即ち、上部旋回体３の旋回中心からカウンタウエイト６の後面までの距離をできるだけ小さくすることが望ましい。このため、カウンタウエイト６は、上部旋回体３の旋回中心に接近した位置に配置されている。 The counterweight 6 is mounted on the rear end side of the swing frame 5, and the counterweight 6 balances the weight with the work device 4. Here, since the wheeled hydraulic excavator 1 travels on a public road, it is desirable to make the turning radius of the upper swing body 3, that is, the distance from the swing center of the upper swing body 3 to the rear surface of the counterweight 6 as small as possible. For this reason, the counterweight 6 is disposed at a position close to the turning center of the upper swing body 3.
　キャブ７は、旋回フレーム５の前部左側に配置され、該キャブ７は、運転室を画成するものである。ここで、キャブ７内には、オペレータが着席する運転席、下部走行体２の前輪２Ａをステアリング操作するためのハンドル、上部旋回体３の旋回動作や作業装置４による掘削作業を操作するための操作レバー装置等（いずれも図示せず）が設けられている。 The cab 7 is disposed on the front left side of the turning frame 5, and the cab 7 defines an operator's cab. Here, in the cab 7, a driver's seat on which the operator is seated, a steering wheel for steering the front wheel 2A of the lower traveling body 2, a turning operation of the upper swing body 3 and an excavation operation by the work device 4 An operation lever device etc. (all not shown) are provided.
　作動油タンク８は、作業装置４の右側に位置して旋回フレーム５上に搭載されている。この作動油タンク８は、ホイール式油圧ショベル１に取付けられた各種の油圧アクチュエータに供給される作動油を貯溜するものである。一方、燃料タンク９は、作動油タンク８の右側に隣接して旋回フレーム５上に搭載されている。この燃料タンク９は、後述するエンジン１０に供給される燃料を貯溜するものである。 The hydraulic oil tank 8 is mounted on the swing frame 5 so as to be located on the right side of the working device 4. The hydraulic oil tank 8 stores hydraulic oil supplied to various hydraulic actuators attached to the wheeled hydraulic excavator 1. On the other hand, the fuel tank 9 is mounted on the swing frame 5 adjacent to the right side of the hydraulic oil tank 8. The fuel tank 9 is for storing the fuel supplied to the engine 10 described later.
　１０はカウンタウエイト６の前側に位置して旋回フレーム５の後部側に搭載された原動機としてのエンジンを示している。このエンジン１０は、内燃機関を構成し、クランク軸（図示せず）の軸線が左，右方向に延びる横置き状態で配置されている。エンジン１０の左側には、ラジエータおよびオイルクーラ等を含む熱交換装置１１が配置され、エンジン１０の右側には油圧ポンプ１２が配置されている。なお、ラジエータはエンジン１０の冷却水を冷却するものであり、オイルクーラは各油圧アクチュエータから戻される作動油を冷却するものである。 The reference numeral 10 denotes an engine as a prime mover which is located on the front side of the counterweight 6 and mounted on the rear side of the swing frame 5. The engine 10 constitutes an internal combustion engine, and is disposed in a horizontally disposed state in which the axis of a crankshaft (not shown) extends leftward and rightward. A heat exchange device 11 including a radiator, an oil cooler, and the like is disposed on the left side of the engine 10, and a hydraulic pump 12 is disposed on the right side of the engine 10. The radiator is for cooling the cooling water of the engine 10, and the oil cooler is for cooling the hydraulic oil returned from each hydraulic actuator.
　油圧ポンプ１２は、エンジン１０によって駆動されることにより、ホイール式油圧ショベル１に搭載された各種の油圧アクチュエータに作動用の圧油を吐出する。即ち、油圧ポンプ１２は、作業装置４に設けられたブームシリンダ４Ｄ、アームシリンダ４Ｅ、バケットシリンダ４Ｆ、下部走行体２に設けられた走行用油圧モータ、上部旋回体３に設けられた旋回用油圧モータ（いずれも図示せず）に対し、作動用の圧油を吐出する。 The hydraulic pump 12 is driven by the engine 10 to discharge pressure oil for operation to various hydraulic actuators mounted on the wheeled hydraulic excavator 1. That is, the hydraulic pump 12 includes a boom cylinder 4D provided in the working device 4, an arm cylinder 4E, a bucket cylinder 4F, a traveling hydraulic motor provided in the lower traveling body 2, and a hydraulic pressure for turning provided in the upper swing body 3. The pressure oil for operation is discharged to the motor (not shown).
　吸気管１３は、エンジン１０に空気を供給するためのもので、該吸気管１３は、エンジン１０から後述する左側面カバー１８に向けて延びている。即ち、吸気管１３の基端側（下流側）は、エンジン１０の吸気側に接続され、吸気管１３の先端側（吸込方向の上流側）は、左側面カバー１８の近傍まで延在し、該吸気管１３の先端側には、後述のエアクリーナ１４が接続されている。 The intake pipe 13 is for supplying air to the engine 10, and the intake pipe 13 extends from the engine 10 toward a left side cover 18 described later. That is, the base end side (downstream side) of the intake pipe 13 is connected to the intake side of the engine 10, and the tip end side (upstream side in the suction direction) of the intake pipe 13 extends to the vicinity of the left side cover 18 An air cleaner 14 described later is connected to the tip end side of the intake pipe 13.
　１４は外装カバー１７の内面側に位置して配置されたエアクリーナを示し、該エアクリーナ１４は、後述するように、エンジン１０等の搭載機器の一部を構成する付属部品の代表例である。このエアクリーナ１４は、エンジン１０と平行となるように横置き状態で外装カバー１７の内面側に配置されている。エアクリーナ１４は、吸気管１３を通じてエンジン１０に供給される空気中のダストを遠心分離し、清浄化した空気のみを吸気管１３に流通させるものである。なお、外装カバー１７の内面側に配置される付属部品は、エアクリーナ１４に限らず、例えば吸気配管類、燃料フィルタ、エンジンオイルフィルタ、リザーブタンク、工具箱等（いずれも図示せず）がある。 An air cleaner 14 is disposed on the inner surface side of the exterior cover 17, and the air cleaner 14 is a representative example of accessories constituting a part of a mounted device such as the engine 10 as described later. The air cleaner 14 is disposed on the inner surface side of the exterior cover 17 in a horizontally placed state so as to be parallel to the engine 10. The air cleaner 14 centrifugally separates dust in the air supplied to the engine 10 through the intake pipe 13 and circulates only the cleaned air to the intake pipe 13. In addition, the attachment parts arrange | positioned at the inner surface side of the exterior cover 17 are not only the air cleaner 14, for example, there exist intake piping, a fuel filter, an engine oil filter, a reserve tank, a tool box etc. (all are not shown).
　ここで、エアクリーナ１４は、軸線が左，右方向に延びる横置き状態で熱交換装置１１の近傍に配置された円筒状のケーシング１４Ａと、該ケーシング１４Ａ内に設けられ空気中のダストを捕捉するフィルタエレメント（図示せず）と、ケーシング１４Ａの軸方向中間位置に下向き状態で設けられた空気流入管１４Ｂと、ケーシング１４Ａの軸方向の一端側（エンジン１０側）に設けられた空気流出管１４Ｃと、ケーシング１４Ａの軸方向の他端側（後述の左側面カバー１８側）に下向き状態で設けられたダスト排出管１４Ｄとにより構成されている。エアクリーナ１４の空気流出管１４Ｃは、吸気管１３の先端側に接続されている。 Here, the air cleaner 14 is provided in a cylindrical casing 14A disposed in the vicinity of the heat exchange device 11 in a horizontally placed state where the axis extends in the left and right directions, and is provided in the casing 14A to capture dust in the air. A filter element (not shown), an air inflow pipe 14B provided downward at an axially intermediate position of the casing 14A, and an air outflow pipe 14C provided on one axial end side (engine 10 side) of the casing 14A. And a dust discharge pipe 14D provided in a downward state on the other axial end side of the casing 14A (on the side of the left side cover 18 described later). An air outflow pipe 14C of the air cleaner 14 is connected to the tip end side of the intake pipe 13.
　これにより、エアクリーナ１４は、空気流入管１４Ｂを通じてケーシング１４Ａ内に導入された空気中のダストを、フィルタエレメントによって捕捉すると共に、空気中のダストをケーシング１４Ａ内で空気を旋回させて遠心分離する。エアクリーナ１４は、遠心分離したダストをダスト排出管１４Ｄを通じてケーシング１４Ａの外部に排出することにより、清浄化された空気のみを空気流出管１４Ｃから吸気管１３を通じてエンジン１０に供給する。 As a result, the air cleaner 14 captures dust in the air introduced into the casing 14A through the air inflow pipe 14B by the filter element, and swirls air in the casing 14A to separate dust in the air. The air cleaner 14 supplies the cleaned air only from the air outflow pipe 14C to the engine 10 through the intake pipe 13 by discharging the centrifugally separated dust to the outside of the casing 14A through the dust discharge pipe 14D.
　１５，１６はエアクリーナ１４のケーシング１４Ａに一体的に設けられた２個のブラケットを示し、各ブラケット１５，１６は、ケーシング１４Ａの一部を構成している。一方のブラケット１５は、エアクリーナ１４の空気流出管１４Ｃ側に設けられ、他方のブラケット１６は、エアクリーナ１４のダスト排出管１４Ｄ側に設けられている。即ち、各ブラケット１５，１６は、ケーシング１４Ａの軸方向に離間して配置され、ケーシング１４Ａの外周面に溶接等の手段を用いて固着されている。 Reference numerals 15 and 16 denote two brackets integrally provided on the casing 14A of the air cleaner 14, and each of the brackets 15 and 16 constitutes a part of the casing 14A. One bracket 15 is provided on the air outflow pipe 14C side of the air cleaner 14, and the other bracket 16 is provided on the dust discharge pipe 14D side of the air cleaner 14. That is, the brackets 15 and 16 are spaced apart in the axial direction of the casing 14A, and are fixed to the outer peripheral surface of the casing 14A by means such as welding.
　ここで、図８ないし図１０に示すように、一方のブラケット１５は、薄肉な帯状の板体を略Ｍ字型に折曲げることにより形成され、基端側がケーシング１４Ａの外周面に固着された一対の脚部１５Ａと、各脚部１５Ａの先端側を連結して水平方向に延びる連結板部１５Ｂとを有している。連結板部１５Ｂの長さ方向の中間部は、ケーシング１４Ａの外周面に固着されている。一方、連結板部１５Ｂの長さ方向の両端側は、ケーシング１４Ａから径方向外側に突出し、前，後方向に離間した平坦な前取付面１５Ｃ，後取付面１５Ｄとなっている。 Here, as shown in FIGS. 8 to 10, one bracket 15 is formed by bending a thin strip-like plate in a substantially M shape, and the base end side is fixed to the outer peripheral surface of the casing 14A. A pair of leg portions 15A and a connecting plate portion 15B which extends in the horizontal direction by connecting the distal end sides of the leg portions 15A are provided. The middle portion in the longitudinal direction of the connection plate portion 15B is fixed to the outer peripheral surface of the casing 14A. On the other hand, both end sides in the longitudinal direction of the connection plate portion 15B protrude outward in the radial direction from the casing 14A, and form flat front attachment surfaces 15C and rear attachment surfaces 15D separated in the front and rear directions.
　前取付面１５Ｃの中央部には、ねじ部挿通孔１５Ｃ１が穿設され、このねじ部挿通孔１５Ｃ１には、後述するボルト３２のねじ部３２Ｂ１が挿通される。一方、後取付面１５Ｄの中央部には、ねじ部挿通孔１５Ｄ１が穿設され、このねじ部挿通孔１５Ｄ１には、後述するボルト３１のねじ部３１Ｂ１が挿通される。これら前，後の取付面１５Ｃ，１５Ｄの裏面側には、ねじ部挿通孔１５Ｃ１，１５Ｄ１と対向する位置にナット１５Ｅがそれぞれ溶接等の手段を用いて固着されている。そして、一方のブラケット１５は、後述する左前上面カバー２７の内面側に、ボルト３１，３２を用いて取付けられる構成となっている。 A threaded portion insertion hole 15C1 is bored in the central portion of the front mounting surface 15C, and a threaded portion 32B1 of a bolt 32 described later is inserted through the threaded portion insertion hole 15C1. On the other hand, a threaded portion insertion hole 15D1 is bored in the central portion of the rear mounting surface 15D, and a threaded portion 31B1 of a bolt 31 described later is inserted through the threaded portion insertion hole 15D1. Nuts 15E are fixed to the back surfaces of the front and rear mounting surfaces 15C and 15D at positions opposite to the screw portion insertion holes 15C1 and 15D1 by means of welding or the like. Then, one bracket 15 is configured to be attached to the inner surface side of a left front upper surface cover 27 described later using bolts 31 and 32.
　他方のブラケット１６は、上述したブラケット１５と同様に略Ｍ字型に折曲げられた板体からなり、一対の脚部１６Ａと、連結板部１６Ｂと、前取付面１６Ｃ，後取付面１６Ｄと、前，後の取付面１６Ｃ，１６Ｄにそれぞれ穿設されたねじ部挿通孔（図示せず）と、前，後の取付面１６Ｃ，１６Ｄの裏面側にそれぞれ固着されたナット１６Ｅとにより構成されている。 The other bracket 16 is a plate bent in a substantially M shape like the bracket 15 described above, and includes a pair of leg portions 16A, a connecting plate portion 16B, a front mounting surface 16C, and a rear mounting surface 16D. , And threaded portions insertion holes (not shown) respectively drilled in the front and rear mounting surfaces 16C and 16D, and nuts 16E fixed on the back sides of the front and rear mounting surfaces 16C and 16D, respectively. ing.
　上述したエンジン１０、熱交換装置１１、油圧ポンプ１２等は、旋回フレーム５上に搭載された搭載機器を構成し、これら搭載機器は、後述する外装カバー１７によって覆われる構成となっている。 The engine 10, the heat exchange device 11, the hydraulic pump 12 and the like described above constitute a mounted device mounted on the swing frame 5, and the mounted device is configured to be covered by an exterior cover 17 described later.
　次に、上述した搭載機器を覆う外装カバー１７について説明する。 Next, the exterior cover 17 covering the above-described mounted device will be described.
　１７はカウンタウエイト６の前側に位置して旋回フレーム５上に設けられた外装カバーを示している。外装カバー１７は、その内面側にエンジン１０、熱交換装置１１、油圧ポンプ１２、エアクリーナ１４等の搭載機器を収容する。外装カバー１７は、後述する左側面カバー１８と、右側面カバー１９と、上面カバー２０とにより構成されている。 Reference numeral 17 denotes an exterior cover provided on the swing frame 5 and located on the front side of the counterweight 6. The exterior cover 17 accommodates mounted devices such as the engine 10, the heat exchange device 11, the hydraulic pump 12, the air cleaner 14 and the like on the inner surface side. The exterior cover 17 is configured of a left side cover 18, a right side cover 19, and an upper surface cover 20 described later.
　左側面カバー１８は、カウンタウエイト６の左端部とキャブ７との間に開，閉可能に設けられ、該左側面カバー１８は、熱交換装置１１、エアクリーナ１４等を左側方から覆うものである。左側面カバー１８の前端部は、旋回フレーム５に設けられたサポート部材にヒンジ機構（いずれも図示せず）を介して回動可能に支持され、左側面カバー１８の後端側は、カウンタウエイト６の前端に当接している。 The left side cover 18 is provided openably and closably between the left end of the counterweight 6 and the cab 7, and the left side cover 18 covers the heat exchange device 11, the air cleaner 14, etc. from the left side. . The front end portion of the left side cover 18 is rotatably supported by a support member provided on the turning frame 5 via a hinge mechanism (not shown), and the rear end side of the left side cover 18 is a counterweight It abuts on the front end of 6.
　右側面カバー１９は、カウンタウエイト６の右端部と燃料タンク９との間に開，閉可能に設けられ、該右側面カバー１９は、エンジン１０、油圧ポンプ１２等を右側方から覆うものである。右側面カバー１９の前端部は、旋回フレーム５に設けられたサポート部材にヒンジ機構（いずれも図示せず）を介して回動可能に支持され、右側面カバー１９の後端側は、カウンタウエイト６の前端に当接している。 The right side cover 19 is provided openably and closably between the right end of the counterweight 6 and the fuel tank 9, and the right side cover 19 covers the engine 10, the hydraulic pump 12 and the like from the right side. . The front end portion of the right side cover 19 is rotatably supported by a support member provided on the turning frame 5 via a hinge mechanism (not shown), and the rear end side of the right side cover 19 is a counterweight It abuts on the front end of 6.
　上面カバー２０は、左側面カバー１８の上端部と右側面カバー１９の上端部との間を左，右方向に延びて設けられ、この上面カバー２０は、エンジン１０等の搭載機器を上方から覆うものである。ここで、図２に示すように、上面カバー２０は、左側面カバー１８の上端部に連なる左後上面カバー２１と、該左後上面カバー２１の前側に位置する後述の左前上面カバー２７と、右側面カバー１９の上端部に連なる右上面カバー２２と、左前上面カバー２７と作動油タンク８との間を左，右方向に延びる中間上面カバー２３とにより構成されている。 The upper surface cover 20 extends left and right between the upper end portion of the left side surface cover 18 and the upper end portion of the right side surface cover 19, and the upper surface cover 20 covers mounting equipment such as the engine 10 from above. It is a thing. Here, as shown in FIG. 2, the upper surface cover 20 includes a left rear upper surface cover 21 connected to the upper end portion of the left side surface cover 18 and a left front upper surface cover 27 described in the front of the left rear upper surface cover 21. A right upper surface cover 22 connected to an upper end portion of the right side surface cover 19 and an intermediate upper surface cover 23 extending between the left front upper surface cover 27 and the hydraulic oil tank 8 in the left and right directions.
　これら左後上面カバー２１、右上面カバー２２、中間上面カバー２３、左前上面カバー２７を、旋回フレーム５上に立設されたサポート部材にボルト（いずれも図示せず）を用いて固定することにより、上面カバー２０が構成されている。この場合、上面カバー２０の中央部には、左後上面カバー２１、左前上面カバー２７、右上面カバー２２、中間上面カバー２３によって囲まれた四角形状をなす作業用開口２４が形成されている。この作業用開口２４は、エンジン１０等の搭載機器に対するメンテナンス作業を行うときに作業者が外装カバー１７内に出入りするものである。 The left rear upper surface cover 21, the right upper surface cover 22, the middle upper surface cover 23, and the left front upper surface cover 27 are fixed to support members provided upright on the turning frame 5 using bolts (not shown). The upper surface cover 20 is configured. In this case, at the central portion of the top cover 20, a rectangular work opening 24 surrounded by the left rear top cover 21, the left front top cover 27, the right top cover 22, and the middle top cover 23 is formed. The work opening 24 allows an operator to enter and exit the exterior cover 17 when performing maintenance work on the mounted device such as the engine 10 or the like.
　２５は原動機カバーとしてのエンジンカバーを示している。このエンジンカバー２５は、外装カバー１７を構成する上面カバー２０の上面側に設けられ、上面カバー２０に形成された作業用開口２４を開，閉可能に覆うものである。ここで、エンジンカバー２５は、作業用開口２４を取囲んで配置され四角形状をなす枠部２５Ａと、該枠部２５Ａの上端側を施蓋する蓋部２５Ｂとを有し、下端側が開口した箱状体からなっている。エンジンカバー２５の枠部２５Ａの下端縁には、全周に亘ってゴム、プラスチック等の弾性材料からなるシール材２５Ｃが設けられている。 Reference numeral 25 denotes an engine cover as a prime mover cover. The engine cover 25 is provided on the upper surface side of the upper surface cover 20 constituting the exterior cover 17 and covers the working opening 24 formed in the upper surface cover 20 so as to be openable and closable. Here, the engine cover 25 has a rectangular frame portion 25A disposed so as to surround the work opening 24, and a lid portion 25B for covering the upper end side of the frame portion 25A, and the lower end side is opened. It consists of a box. At the lower end edge of the frame portion 25A of the engine cover 25, a sealing material 25C made of an elastic material such as rubber or plastic is provided over the entire circumference.
　エンジンカバー２５の右端側は、右上面カバー２０を支持するサポート部材（図示せず）にヒンジ部材２６を介して取付けられ、エンジンカバー２５の左端側は、ヒンジ部材２６を中心として上，下方向に回動する。これにより、エンジンカバー２５は、図１ないし図３に示す閉位置となったときに、枠部２５Ａの下端縁に設けたシール材２５Ｃが外装カバー１７の外面に当接し、作業用開口２４を閉塞する構成となっている。 The right end side of the engine cover 25 is attached via a hinge member 26 to a support member (not shown) supporting the right upper surface cover 20, and the left end side of the engine cover 25 is upward and downward centering on the hinge member 26 To rotate. As a result, when the engine cover 25 is in the closed position shown in FIGS. 1 to 3, the seal material 25C provided at the lower end edge of the frame 25A abuts on the outer surface of the exterior cover 17 to open the work opening 24. It is configured to be closed.
　ここで、外装カバー１７の内面側に配置されるエアクリーナ１４は、左前上面カバー２７の内面側に後述のボルト３１，３２を用いて取付けられている。この場合、図２および図３に示すように、エアクリーナ１４を取付けるボルト３１の取付位置が、閉位置となったエンジンカバー２５の下端部と一致する場合には、エンジンカバー２５のシール材２５Ｃが、ボルト３１の頭部３１Ａに干渉するのを防止する必要がある。 Here, the air cleaner 14 disposed on the inner surface side of the exterior cover 17 is attached to the inner surface side of the left front upper surface cover 27 using bolts 31 and 32 described later. In this case, as shown in FIGS. 2 and 3, when the mounting position of the bolt 31 for mounting the air cleaner 14 coincides with the lower end portion of the engine cover 25 in the closed position, the seal material 25C of the engine cover 25 is It is necessary to prevent interference with the head 31A of the bolt 31.
　これに対し、本実施の形態においては、左前上面カバー２７にエアクリーナ１４を取付けたときに、ボルト３１の頭部３１Ａが左前上面カバー２７の外面（上面）よりも内側（エアクリーナ１４側）に引っ込むように工夫されており、以下、この左前上面カバー２７の構成について説明する。 On the other hand, in the present embodiment, when the air cleaner 14 is attached to the left front upper surface cover 27, the head 31A of the bolt 31 is recessed inward (air cleaner 14 side) than the outer surface (upper surface) of the left front upper surface cover 27. The configuration of the left front upper surface cover 27 is described below.
　即ち、２７は外装カバー１７（上面カバー２０）の一部を構成する左前上面カバーを示している。左前上面カバー２７の内面側には、付属部品としてのエアクリーナ１４が取付けられている。ここで、図３ないし図６に示すように、左前上面カバー２７は、全体として四角形状をなし、外面（上面）２７Ａと内面２７Ｂとを有する平板状に形成されている。左前上面カバー２７には、左後上面カバー２１と中間上面カバー２３とに隣接する角隅に、作業用開口２４の一部を形成する矩形状の切欠き部２７Ｃが形成されている。 That is, reference numeral 27 denotes a left front upper surface cover which constitutes a part of the exterior cover 17 (upper surface cover 20). An air cleaner 14 as an accessory component is attached to the inner surface side of the left front upper surface cover 27. Here, as shown in FIG. 3 to FIG. 6, the left front upper surface cover 27 has a rectangular shape as a whole, and is formed in a flat plate shape having an outer surface (upper surface) 27A and an inner surface 27B. The left front upper surface cover 27 is formed at a corner adjacent to the left rear upper surface cover 21 and the middle upper surface cover 23 with a rectangular notch 27C that forms a part of the work opening 24.
　ここで、左前上面カバー２７には、切欠き部２７Ｃの近傍に位置する１個のボルト挿通孔２７Ｄと、該ボルト挿通孔２７Ｄよりも小さな孔径を有する３個の貫通孔２７Ｅとが穿設されている。この場合、１個のボルト挿通孔２７Ｄは、エンジンカバー２５が閉位置となったときに、このエンジンカバー２５のシール材２５Ｃが当接する部位に配置され、３個の貫通孔２７Ｅは、エンジンカバー２５が閉位置となったときにも外部から目視し得る位置（エンジンカバー２５によって覆われない位置）に配置されている。この場合、ボルト挿通孔２７Ｄは、後述するボルト３１の頭部３１Ａと軸部３１Ｂとを挿通することができる孔径を有している。さらに、ボルト挿通孔２７Ｄは、ボルト３１を締込むために頭部３１Ａに係合するソケットレンチ等の締結工具(図示せず)を挿通することができる孔径に設定されている。 Here, in the left front upper surface cover 27, one bolt insertion hole 27D located in the vicinity of the notch 27C and three through holes 27E having a smaller hole diameter than the bolt insertion hole 27D are drilled. ing. In this case, one bolt insertion hole 27D is disposed at a portion of the engine cover 25 in contact with the seal member 25C when the engine cover 25 is in the closed position, and the three through holes 27E are the engine cover It is disposed at a position where it can be viewed from the outside (a position not covered by the engine cover 25) even when the position 25 is in the closed position. In this case, the bolt insertion hole 27D has a hole diameter through which the head 31A and the shaft 31B of the bolt 31 described later can be inserted. Further, the bolt insertion hole 27D is set to a hole diameter through which a fastening tool (not shown) such as a socket wrench engaged with the head 31A can be inserted in order to clamp the bolt 31.
　一方、３個の貫通孔２７Ｅは、後述する他のボルト３２の軸部３２Ｂのみを挿通することができる孔径を有している。左前上面カバー２７の内面２７Ｂ側には、ボルト挿通孔２７Ｄに対応する位置に後述のボルト頭部受け座２８が設けられている。３個の貫通孔２７Ｅに対応する位置には、それぞれ後述のスペーサ３０が設けられている。 On the other hand, the three through holes 27E have a hole diameter through which only the shaft portion 32B of another bolt 32 described later can be inserted. On the inner surface 27B side of the left front upper surface cover 27, a bolt head seat 28 described later is provided at a position corresponding to the bolt insertion hole 27D. Spacers 30, which will be described later, are provided at positions corresponding to the three through holes 27E.
　２８は左前上面カバー２７の内面２７Ｂに設けられたボルト頭部受け座を示している。ボルト頭部受け座２８は、ボルト挿通孔２７Ｄに対応する位置に配置され、後述するボルト３１の頭部３１Ａを受けるものである。図６ないし図８に示すように、ボルト頭部受け座２８は、長方形状をなす鋼板等を折曲げることにより形成された断面Ｕ字型の枠体２８Ａと、該枠体２８Ａに固着された筒体２８Ｂとにより構成されている。 Reference numeral 28 denotes a bolt head seat provided on the inner surface 27B of the left front upper surface cover 27. The bolt head support 28 is disposed at a position corresponding to the bolt insertion hole 27D, and receives a head 31A of a bolt 31 described later. As shown in FIGS. 6 to 8, the bolt head seat 28 is fixed to the frame 28A having a U-shaped cross section formed by bending a rectangular steel plate or the like, and the frame 28A. It is comprised by the cylinder 28B.
　ここで、ボルト頭部受け座２８の枠体２８Ａは、左前上面カバー２７の内面２７Ｂと一定の間隔をもって対面する底面２８Ａ１と、該底面２８Ａ１の長手方向の両端部から互いに対面しつつ上向きに延びる一対の側面２８Ａ２とを有している。底面２８Ａ１の中央部には、ボルト３１の軸部３１Ｂが挿通される軸部挿通孔２８Ａ３が穿設されている。 Here, the frame body 28A of the bolt head seat 28 extends upward while facing each other from the bottom surface 28A1 facing the inner surface 27B of the left front upper surface cover 27 at a constant distance, and both ends in the longitudinal direction of the bottom surface 28A1. And a pair of side surfaces 28A2. At a central portion of the bottom surface 28A1, a shaft portion insertion hole 28A3 into which the shaft portion 31B of the bolt 31 is inserted is bored.
　このように、枠体２８Ａは、底面２８Ａ１と一対の側面２８Ａ２とにより断面Ｕ字型に形成されている。このため、例えば雨水等がボルト挿通孔２７Ｄを通じて左前上面カバー２７の内面２７Ｂ側に浸入した場合でも、この雨水等を左前上面カバー２７と枠体２８Ａとの間に形成された空間を通じて外部に排出することができる。 Thus, the frame 28A is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2. Therefore, for example, even when rainwater or the like enters the inner surface 27B side of the left front upper surface cover 27 through the bolt insertion hole 27D, the rain water or the like is discharged to the outside through the space formed between the left front upper surface cover 27 and the frame 28A. can do.
　一方、ボルト頭部受け座２８の筒体２８Ｂは、上，下方向に延びる円筒体からなり、その内周側は、ボルト３１の軸部３１Ｂが挿通される軸部挿通孔２８Ｃとなっている。筒体２８Ｂの一端側（上端側）は、枠体２８Ａの底面２８Ａ１に溶接等の手段を用いて固着され、軸部挿通孔２８Ｃは、枠体２８Ａの軸部挿通孔２８Ａ３と同軸に配置されている。筒体２８Ｂの他端側（下端側）は、エアクリーナ１４に設けられたブラケット１５の後取付面１５Ｄに当接する構成となっている。 On the other hand, the cylindrical body 28B of the bolt head seat 28 is a cylindrical body extending upward and downward, and the inner peripheral side thereof is a shaft insertion hole 28C through which the shaft 31B of the bolt 31 is inserted. . One end side (upper end side) of the cylindrical body 28B is fixed to the bottom surface 28A1 of the frame 28A by means of welding or the like, and the shaft insertion hole 28C is disposed coaxially with the shaft insertion hole 28A3 of the frame 28A. ing. The other end side (lower end side) of the cylindrical body 28B is configured to abut on the rear mounting surface 15D of the bracket 15 provided on the air cleaner 14.
　ボルト頭部受け座２８の枠体２８Ａを構成する各側面２８Ａ２の上端部は、左前上面カバー２７の内面２７Ｂに溶接等の手段を用いて固着される。これにより、ボルト頭部受け座２８は、左前上面カバー２７の内面２７Ｂのうち、ボルト挿通孔２７Ｄと対応する位置に配設される。この状態で、左前上面カバー２７の内面２７Ｂとボルト頭部受け座２８の枠体２８Ａの底面２８Ａ１との間には、ボルト３１の頭部３１Ａを収容するボルト頭部収容空間２９が形成されている。 The upper end portion of each side surface 28A2 constituting the frame 28A of the bolt head seat 28 is fixed to the inner surface 27B of the left front upper surface cover 27 using a means such as welding. Thus, the bolt head support 28 is disposed at a position corresponding to the bolt insertion hole 27D in the inner surface 27B of the left front upper surface cover 27. In this state, a bolt head accommodation space 29 for accommodating the head 31A of the bolt 31 is formed between the inner surface 27B of the left front upper surface cover 27 and the bottom surface 28A1 of the frame 28A of the bolt head seat 28 There is.
　従って、図８に示すように、左前上面カバー２７のボルト挿通孔２７Ｄに、ボルト３１の頭部３１Ａと軸部３１Ｂとを挿通し、ボルト３１の軸部３１Ｂを、ボルト頭部受け座２８の枠体２８Ａに設けた軸部挿通孔２８Ａ３と、筒体２８Ｂの軸部挿通孔２８Ｃとに挿通することにより、ボルト３１の頭部３１Ａは、枠体２８Ａの底面２８Ａ１に当接する。これにより、ボルト３１の頭部３１Ａをボルト頭部収容空間２９内に収容することができ、頭部３１Ａが、左前上面カバー２７の外面２７Ａ側に突出するのを回避することができる。 Therefore, as shown in FIG. 8, the head 31 A and the shaft 31 B of the bolt 31 are inserted into the bolt insertion hole 27 D of the left front upper surface cover 27, and the shaft 31 B of the bolt 31 is The head portion 31A of the bolt 31 abuts on the bottom surface 28A1 of the frame 28A by inserting the shaft portion insertion hole 28A3 provided in the frame 28A and the shaft portion insertion hole 28C of the cylinder 28B. Thus, the head 31A of the bolt 31 can be accommodated in the bolt head accommodation space 29, and the head 31A can be prevented from protruding toward the outer surface 27A of the left front upper surface cover 27.
　３０は左前上面カバー２７の内面２７Ｂに設けられた３個のスペーサを示し、該各スペーサ３０は、３個の貫通孔２７Ｅに対応する位置に配置されている。各スペーサ３０は、左前上面カバー２７に対するエアクリーナ１４の上，下方向の取付位置を設定するもので、上，下方向に延びる円筒体からなり、その内周側は、後述する他のボルト３２の軸部３２Ｂが挿通される軸部挿通孔３０Ａとなっている。各スペーサ３０の一端部（上端部）は、左前上面カバー２７の内面２７Ｂに溶接等の手段を用いて固着され、スペーサ３０の軸部挿通孔３０Ａは、左前上面カバー２７に穿設された貫通孔２７Ｅと同軸に配置されている。各スペーサ３０の他端部（下端部）は、ボルト頭部受け座２８を構成する筒体２８Ｂの下端部と同一平面内に配置され、エアクリーナ１４に設けられた一方のブラケット１５の前取付面１５Ｃ、および他方のブラケット１６の前，後の取付面１６Ｃ，１６Ｄにそれぞれ当接している。 Reference numeral 30 denotes three spacers provided on the inner surface 27B of the left front upper surface cover 27, and the spacers 30 are disposed at positions corresponding to the three through holes 27E. Each spacer 30 sets the upper and lower attachment positions of the air cleaner 14 with respect to the left front upper surface cover 27, and consists of a cylinder extending upward and downward, and the inner peripheral side thereof is formed of another bolt 32 described later. It has become the axial part penetration hole 30A in which the axial part 32B is penetrated. One end (upper end) of each spacer 30 is fixed to the inner surface 27B of the left front upper surface cover 27 by means such as welding, and the shaft insertion hole 30A of the spacer 30 is a through hole formed in the left front upper surface cover 27 It is arranged coaxially with the hole 27E. The other end portion (lower end portion) of each spacer 30 is disposed in the same plane as the lower end portion of the cylindrical body 28B constituting the bolt head receiving seat 28, and the front attachment surface of one bracket 15 provided on the air cleaner 14 The front and rear mounting surfaces 16C and 16D of the other bracket 16 abut on the front surface 15C and the other bracket 16 respectively.
　次に、３１は左前上面カバー２７のボルト挿通孔２７Ｄとボルト頭部受け座２８の軸部挿通孔２８Ａ３および筒体２８Ｂとに挿通される１本のボルトを示している。このボルト３１は、エアクリーナ１４のブラケット１５のうち、左前上面カバー２７のボルト挿通孔２７Ｄに対応する位置に配置された後取付面１５Ｄを、左前上面カバー２７に取付けるものである。ここで、ボルト３１は、六角形状の頭部３１Ａと、該頭部３１Ａから下向きに延びる軸部３１Ｂとからなり、該軸部３１Ｂの下端側には、ねじ部（雄ねじ部）３１Ｂ１が設けられている。 Next, reference numeral 31 denotes one bolt inserted through the bolt insertion hole 27D of the left front upper surface cover 27, the shaft portion insertion hole 28A3 of the bolt head receiving seat 28 and the cylindrical body 28B. The bolt 31 is for attaching the rear mounting surface 15D, which is disposed at a position corresponding to the bolt insertion hole 27D of the left front upper surface cover 27 among the brackets 15 of the air cleaner 14, to the left front upper surface cover 27. Here, the bolt 31 is composed of a hexagonal head 31A and a shaft 31B extending downward from the head 31A, and a screw (male screw) 31B1 is provided on the lower end side of the shaft 31B. ing.
　ボルト３１の軸部３１Ｂは、左前上面カバー２７のボルト挿通孔２７Ｄ、ボルト頭部受け座２８の軸部挿通孔２８Ａ３、筒体２８Ｂの軸部挿通孔２８Ｃに順次挿通される。軸部３１Ｂの下端側に設けられたねじ部３１Ｂ１は、ブラケット１５の後取付面１５Ｄに形成されたねじ部挿通孔１５Ｄ１に挿通され、ブラケット１５に固着されたナット１５Ｅに螺着される。 The shaft 31B of the bolt 31 is sequentially inserted into the bolt insertion hole 27D of the left front upper surface cover 27, the shaft insertion hole 28A3 of the bolt head seat 28, and the shaft insertion hole 28C of the cylindrical body 28B. The screw portion 31B1 provided on the lower end side of the shaft portion 31B is inserted into a screw portion insertion hole 15D1 formed in the rear mounting surface 15D of the bracket 15, and screwed to a nut 15E fixed to the bracket 15.
　これにより、ブラケット１５に設けられた後取付面１５Ｄが、ボルト３１を用いて左前上面カバー２７に取付けられる。このとき、ボルト３１の頭部３１Ａは、ボルト頭部受け座２８を構成する枠体２８Ａの底面２８Ａ１と左前上面カバー２７の内面２７Ｂとの間に形成されたボルト頭部収容空間２９内に収容される。このため、ボルト３１の頭部３１Ａは、左前上面カバー２７の外面２７Ａ側に突出しない構成となっている。 Thereby, the rear mounting surface 15D provided on the bracket 15 is attached to the left front upper surface cover 27 using the bolt 31. At this time, the head 31A of the bolt 31 is accommodated in the bolt head accommodation space 29 formed between the bottom surface 28A1 of the frame 28A constituting the bolt head seat 28 and the inner surface 27B of the left front upper surface cover 27. Be done. For this reason, the head 31 </ b> A of the bolt 31 does not protrude toward the outer surface 27 </ b> A of the left front upper surface cover 27.
　ここで、図９に示すように、ボルト頭部受け座２８の筒体２８Ｂをブラケット１５の後取付面１５Ｄに当接させた状態で、左前上面カバー２７の外面２７Ａから後取付面１５Ｄのねじ部挿通孔１５Ｄ１とナット１５Ｅとの境界部までの長さ寸法をＸとし、ボルト３１の軸部３１Ｂの長さ寸法をＹとすると、長さ寸法Ｙは長さ寸法Ｘよりも大きな寸法に設定されている（Ｙ＞Ｘ）。 Here, as shown in FIG. 9, with the cylindrical body 28B of the bolt head seat 28 in contact with the rear mounting surface 15D of the bracket 15, the screws from the outer surface 27A of the left front cover 27 to the rear mounting surface 15D Assuming that the length dimension up to the boundary between the insertion hole 15D1 and the nut 15E is X, and the length dimension of the shaft 31B of the bolt 31 is Y, the length dimension Y is set to be larger than the length dimension X (Y> X).
　従って、図１０に示すように、ボルト頭部受け座２８の軸部挿通孔２８Ａ３と筒体２８Ｂの軸部挿通孔２８Ａ３とにボルト３１の軸部３１Ｂを挿通し、ねじ部３１Ｂ１をブラケット１５の後取付面１５Ｄに固着されたナット１５Ｅに仮締めするときに、ボルト３１の頭部３１Ａを、左前上面カバー２７の外面２７Ａから上方に突出させることができる。これにより、作業者は、ボルト３１の頭部３１Ａを手作業で回転させ、ねじ部３１Ｂ１をナット１５Ｅに螺入することができる構成となっている。 Therefore, as shown in FIG. 10, the shank 31B of the bolt 31 is inserted through the shank insertion hole 28A3 of the bolt head seat 28 and the shank insertion hole 28A3 of the cylindrical body 28B. When temporarily fastening to the nut 15E fixed to the rear mounting surface 15D, the head 31A of the bolt 31 can be protruded upward from the outer surface 27A of the left front upper surface cover 27. As a result, the operator can manually rotate the head 31A of the bolt 31 and screw the screw portion 31B1 into the nut 15E.
　３２はボルト３１以外の３本の他のボルトを示し、これら他のボルト３２は、一方のブラケット１５の前取付面１５Ｃと、他方のブラケット１６の前，後の取付面１６Ｃ，１６Ｄとを、左前上面カバー２７に取付けるものである。ここで、他のボルト３２は、六角形状の頭部３２Ａと、軸部３２Ｂと、ねじ部（雄ねじ部）３２Ｂ１とにより構成され、他のボルト３２の軸部３２Ｂは、ボルト３１の軸部３１Ｂよりも長尺に形成されている。 Reference numeral 32 denotes three other bolts other than the bolt 31. These other bolts 32 include a front mounting surface 15C of one bracket 15 and front and rear mounting surfaces 16C and 16D of the other bracket 16, It is attached to the front left upper cover 27. Here, the other bolt 32 is composed of a hexagonal head 32A, a shaft 32B, and a screw (male screw) 32B1. The shaft 32B of the other bolt 32 is a shaft 31B of the bolt 31. It is formed longer than.
　３本の他のボルト３２の軸部３２Ｂは、左前上面カバー２７の貫通孔２７Ｅ、各スペーサ３０の軸部挿通孔３０Ａに順次挿通される。軸部３２Ｂの下端側に設けられたねじ部３２Ｂ１は、ブラケット１５の前取付面１５Ｃに形成されたねじ部挿通孔１５Ｃ１と、ブラケット１６の前取付面１６Ｃに形成されたねじ部挿通孔（図示せず）と、ブラケット１６の後取付面１６Ｄに形成されたねじ部挿通孔（図示せず）とに挿通され、ナット１５Ｅ，１６Ｅにそれぞれ螺着される。これにより、ブラケット１５の前取付面１５Ｃと、ブラケット１６の前，後の取付面１６Ｃ，１６Ｄとの３箇所が、他のボルト３２を用いて左前上面カバー２７に取付けられる構成となっている。 Shaft portions 32B of the three other bolts 32 are sequentially inserted through the through holes 27E of the left front upper surface cover 27 and the shaft portion insertion holes 30A of the respective spacers 30. The screw portion 32B1 provided on the lower end side of the shaft portion 32B is a screw portion insertion hole 15C1 formed on the front mounting surface 15C of the bracket 15 and a screw portion insertion hole formed on the front mounting surface 16C of the bracket 16 (see FIG. (Not shown) and a threaded portion insertion hole (not shown) formed in the rear mounting surface 16D of the bracket 16 and screwed to the nuts 15E and 16E, respectively. As a result, the front mounting surface 15C of the bracket 15 and the front and rear mounting surfaces 16C and 16D of the bracket 16 are attached to the left front upper surface cover 27 using other bolts 32.
　本実施の形態によるホイール式油圧ショベル１は上述の如き構成を有するもので、このホイール式油圧ショベル１は、下部走行体２に設けられた前輪２Ａおよび後輪２Ｂを駆動することにより、作業現場に向けて公道等を走行する。ホイール式油圧ショベル１は、作業現場で上部旋回体３を旋回させつつ、作業装置４を用いて土砂の掘削作業等を行う。 The wheeled hydraulic excavator 1 according to the present embodiment has the above-described configuration, and the wheeled hydraulic excavator 1 operates the work site by driving the front wheel 2A and the rear wheel 2B provided on the lower traveling body 2. Drive on public roads etc. The wheel type hydraulic shovel 1 performs excavation work of earth and sand, etc. using the work device 4 while turning the upper swing body 3 at the work site.
　ここで、ホイール式油圧ショベル１に搭載されたエンジン１０、熱交換装置１１、エアクリーナ１４等の搭載機器に対する保守、点検作業を行う場合には、エンジンカバー２５をヒンジ部材２６を中心として回動させる。これにより、外装カバー１７の上面カバー２０に形成された作業用開口２４が開放され、作業者は作業用開口２４を通じて外装カバー１７の内側に入ることができる。搭載機器に対する保守、点検作業が終了した後には、エンジンカバー２５を閉位置に回動させる。これにより、エンジンカバー２５の下端側に設けられたシール材２５Ｃが上面カバー２０の外面に当接し、作業用開口２４を確実に閉塞することができる。 Here, when performing maintenance and inspection operations on the mounted devices such as the engine 10, the heat exchange device 11, and the air cleaner 14 mounted on the wheeled hydraulic excavator 1, the engine cover 25 is rotated about the hinge member 26. . As a result, the work opening 24 formed in the upper surface cover 20 of the exterior cover 17 is opened, and the operator can enter inside the exterior cover 17 through the work opening 24. After the maintenance and inspection work on the mounted equipment is completed, the engine cover 25 is pivoted to the closed position. As a result, the sealing material 25C provided on the lower end side of the engine cover 25 abuts on the outer surface of the top cover 20, and the work opening 24 can be reliably closed.
　ここで、エアクリーナ１４は、上面カバー２０を構成する左前上面カバー２７の内面２７Ｂ側にボルト３１，３２を用いて取付けられ、図２および図３に示すように、ボルト３１の取付位置は、閉位置となったエンジンカバー２５の下端部と一致している。このため、枠部２５Ａの下端部に取付けられたシール材２５Ｃが、ボルト３１の頭部３１Ａに干渉して損傷するのを防止する必要がある。 Here, the air cleaner 14 is attached to the inner surface 27B side of the left front upper surface cover 27 constituting the upper surface cover 20 using the bolts 31 and 32, and the attachment position of the bolt 31 is closed as shown in FIGS. It coincides with the lower end of the engine cover 25 at which it is positioned. Therefore, it is necessary to prevent the seal material 25C attached to the lower end portion of the frame portion 25A from interfering with the head portion 31A of the bolt 31 and damaging it.
　これに対し、本実施の形態においては、左前上面カバー２７のうち閉位置となったエンジンカバー２５の枠部２５Ａが当接する部位に、ボルト３１の頭部３１Ａと軸部３１Ｂが挿通されるボルト挿通孔２７Ｄを設けている。一方、左前上面カバー２７の内面２７Ｂ側には、ボルト挿通孔２７Ｄと対応する位置に、ボルト３１の軸部３１Ｂが挿通される軸部挿通孔２８Ａ３を有し、ボルト３１の頭部３１Ａを受けるボルト頭部受け座２８を設けている。 On the other hand, in the present embodiment, a bolt in which the head 31A and the shaft 31B of the bolt 31 are inserted into a portion of the left front upper surface cover 27 which contacts the frame 25A of the engine cover 25 in the closed position. An insertion hole 27D is provided. On the other hand, on the inner surface 27B side of the left front upper surface cover 27, at a position corresponding to the bolt insertion hole 27D, there is provided a shaft portion insertion hole 28A3 into which the shaft portion 31B of the bolt 31 is inserted. A bolt head seat 28 is provided.
　ここで、エアクリーナ１４の一方のブラケット１５を構成する後取付面１５Ｄを、ボルト３１を用いて左前上面カバー２７に取付ける場合には、ボルト３１の軸部３１Ｂを、左前上面カバー２７のボルト挿通孔２７Ｄ、ボルト頭部受け座２８の軸部挿通孔２８Ａ３、筒体２８Ｂの軸部挿通孔２８Ｃに順次挿通する。 Here, in the case where the rear mounting surface 15D constituting one bracket 15 of the air cleaner 14 is attached to the left front upper surface cover 27 using the bolt 31, the shaft portion 31B of the bolt 31 and the bolt insertion hole of the left front upper surface cover 27 27D, the shaft portion insertion hole 28A3 of the bolt head support 28 and the shaft portion insertion hole 28C of the cylindrical body 28B are sequentially inserted.
　一方、ボルト頭部受け座２８の筒体２８Ｂを、ブラケット１５の後取付面１５Ｃに当接させ、ボルト３１のねじ部３１Ｂ１を、後取付面１５Ｄに形成されたねじ部挿通孔１５Ｄ１に挿通する。この状態で、例えば手作業でボルト３１の頭部３１Ａを回転させることにより、ブラケット１５に固着されたナット１５Ｅにねじ部３１Ｂ１を螺入（仮締め）していく。これにより、ボルト３１の頭部３１Ａが、左前上面カバー２７の内面２７Ｂ側に没入した後には、例えばソケットレンチ等の締結工具（図示せず）を、左前上面カバー２７のボルト挿通孔２７Ｄ内に入れる。さらに、締結工具をボルト３１の頭部３１Ａに係合させ、この締結工具を用いてボルト３１のねじ部３１Ｂ１をナット１５Ｅに締込む。 On the other hand, the cylinder 28B of the bolt head seat 28 is brought into contact with the rear mounting surface 15C of the bracket 15, and the threaded portion 31B1 of the bolt 31 is inserted into the threaded portion insertion hole 15D1 formed in the rear mounting surface 15D. . In this state, for example, by manually rotating the head 31A of the bolt 31, the screw portion 31B1 is screwed (temporarily tightened) to the nut 15E fixed to the bracket 15. Thus, after the head 31A of the bolt 31 is sunk into the inner surface 27B of the left front upper surface cover 27, a fastening tool (not shown) such as a socket wrench is inserted into the bolt insertion hole 27D of the left front upper surface cover 27. Put in. Further, the fastening tool is engaged with the head 31A of the bolt 31, and the threaded portion 31B1 of the bolt 31 is tightened into the nut 15E using the fastening tool.
　これにより、一方のブラケット１５に設けられた後取付面１５Ｄを、ボルト３１を用いて左前上面カバー２７の内面２７Ｂ側に取付けることができる。このとき、図８に示すように、ボルト３１の頭部３１Ａは、ボルト頭部受け座２８を構成する枠体２８Ａの底面２８Ａ１と左前上面カバー２７の内面２７Ｂとの間に形成されたボルト頭部収容空間２９内に収容される。この結果、ボルト３１の頭部３１Ａは、ボルト頭部収容空間２９内に隠蔽され、左前上面カバー２７の外面２７Ａ側に突出するのを抑えることができる。この結果、閉位置となったエンジンカバー２５のシール材２５Ｃが、ボルト３１の頭部３１Ａに干渉して破損するのを確実に回避することができる。 Thus, the rear attachment surface 15D provided on one of the brackets 15 can be attached to the inner surface 27B of the left front upper surface cover 27 using the bolt 31. At this time, as shown in FIG. 8, the head 31A of the bolt 31 is a bolt head formed between the bottom surface 28A1 of the frame 28A constituting the bolt head seat 28 and the inner surface 27B of the left front upper surface cover 27. It is accommodated in the part accommodation space 29. As a result, the head 31A of the bolt 31 is concealed in the bolt head accommodation space 29, and it is possible to suppress the protrusion on the outer surface 27A side of the left front upper surface cover 27. As a result, the seal member 25C of the engine cover 25 in the closed position can be reliably prevented from interfering with the head 31A of the bolt 31 and being damaged.
　また、左前上面カバー２７の内面２７Ｂに固着されたボルト頭部受け座２８の枠体２８Ａは、底面２８Ａ１と一対の側面２８Ａ２とにより断面Ｕ字型に形成されている。このため、例えば雨水等がボルト挿通孔２７Ｄを通じて左前上面カバー２７の内面２７Ｂ側に浸入した場合でも、この雨水等を左前上面カバー２７と枠体２８Ａとの間に形成された空間を通じて外部に排出することができる。この結果、左前上面カバー２７とボルト頭部受け座２８との間のボルト頭部収容空間２９内に雨水等が滞留するのを抑え、このボルト頭部収容空間２９に収容されたボルト３１の頭部３１Ａが腐食するのを防止することができる。 The frame 28A of the bolt head seat 28 fixed to the inner surface 27B of the left front upper surface cover 27 is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2. Therefore, for example, even when rainwater or the like enters the inner surface 27B side of the left front upper surface cover 27 through the bolt insertion hole 27D, the rain water or the like is discharged to the outside through the space formed between the left front upper surface cover 27 and the frame 28A. can do. As a result, rainwater and the like are prevented from staying in the bolt head housing space 29 between the left front upper surface cover 27 and the bolt head seat 28, and the head of the bolt 31 housed in the bolt head housing space 29. Corrosion of the portion 31A can be prevented.
　一方、図９に示すように、ボルト３１の軸部３１Ｂの長さ寸法Ｙは、ボルト頭部受け座２８の筒体２８Ｂを、ブラケット１５の後取付面１５Ｄに当接させた状態で、左前上面カバー２７の外面２７Ａから後取付面１５Ｄのねじ部挿通孔１５Ｄ１とナット１５Ｅとの境界部までの長さ寸法Ｘよりも大きな寸法に設定されている。 On the other hand, as shown in FIG. 9, the length dimension Y of the shaft portion 31B of the bolt 31 is such that the cylinder 28B of the bolt head seat 28 is in contact with the rear mounting surface 15D of the bracket 15. The dimension is set to be larger than the length dimension X from the outer surface 27A of the upper surface cover 27 to the boundary between the screw portion insertion hole 15D1 of the rear attachment surface 15D and the nut 15E.
　これにより、ボルト頭部受け座２８の筒体２８Ｂを、ブラケット１５の後取付面１５Ｄに当接させ、後取付面１５Ｄのナット１５Ｅにボルト３１のねじ部３１Ｂ１を仮締めするときに、ボルト３１の頭部３１Ａを、左前上面カバー２７の外面２７Ａから適宜に突出させることができる。この結果、作業者はボルト３１の頭部３１Ａを把持することにより、ボルト３１のねじ部３１Ｂ１をナット１５Ｅに螺入する仮締め作業を手作業で行うことができ、エアクリーナ１４の取付作業時に、ボルト３１の位置決め作業や仮締め作業を容易に行うことができる。 As a result, when the cylinder 28B of the bolt head seat 28 is brought into contact with the rear mounting surface 15D of the bracket 15, and the screw 31B1 of the bolt 31 is temporarily tightened on the nut 15E of the rear mounting surface 15D The head 31 </ b> A can be suitably protruded from the outer surface 27 </ b> A of the left front upper surface cover 27. As a result, by holding the head portion 31A of the bolt 31, the operator can manually perform a temporary tightening operation of screwing the screw portion 31B1 of the bolt 31 into the nut 15E. Positioning operation and temporary tightening operation of the bolt 31 can be easily performed.
　次に、一方のブラケット１５の前取付面１５Ｃと、他方のブラケット１６の前，後の取付面１６Ｃ，１６Ｄとを、３本の他のボルト３２を用いて左前上面カバー２７に取付ける場合には、これら他のボルト３２の軸部３２Ｂを、左前上面カバー２７の３個の貫通孔２７Ｅと、これら各貫通孔２７Ｅに対応して左前上面カバー２７に固着された３本のスペーサ３０の軸部挿通孔３０Ａに順次挿通する。次に、他のボルト３２のねじ部３２Ｂ１を、ブラケット１５の前取付面１５Ｃに設けたねじ部挿通孔１５Ｃ１と、ブラケット１６の前取付面１６Ｃに設けたねじ部挿通孔（図示せず）と、ブラケット１６の後取付面１６Ｄに設けたけねじ部挿通孔（図示せず）とに挿通した後、ブラケット１５に固着されたナット１５Ｅと、ブラケット１６に固着されたナット１６Ｅとに螺着する。 Next, in the case where the front mounting surface 15C of one bracket 15 and the front and rear mounting surfaces 16C and 16D of the other bracket 16 are attached to the left front upper surface cover 27 using three other bolts 32, The shanks 32B of these other bolts 32 are the three through holes 27E of the front left upper cover 27 and the shanks of the three spacers 30 fixed to the front left upper cover 27 corresponding to the respective through holes 27E. The insertion holes 30A are sequentially inserted. Next, a screw portion insertion hole 15C1 provided on the front mounting surface 15C of the bracket 15 with a screw portion 32B1 of another bolt 32, and a screw portion insertion hole (not shown) provided on the front mounting surface 16C of the bracket 16 After being inserted into a threaded portion insertion hole (not shown) provided on the rear mounting surface 16D of the bracket 16, screwing is performed on the nut 15E fixed to the bracket 15 and the nut 16E fixed to the bracket 16.
　これにより、ブラケット１５の前取付面１５Ｃとブラケット１６の前，後の取付面１６Ｃ，１６Ｄの３箇所を、他のボルト３２を用いて左前上面カバー２７に取付けることができる。この場合、図３に示すように、他のボルト３２の頭部３２Ａは、左前上面カバー２７の外面２７Ａ側に突出する。しかし、他のボルト３２の頭部３２Ａは、閉位置となったエンジンカバー２５の下端部から離れた位置に配置されるので、他のボルト３２の頭部３２Ａが、エンジンカバー２５のシール材２５Ｃに干渉することはない。 As a result, the front mounting surface 15C of the bracket 15 and the front and rear mounting surfaces 16C and 16D of the bracket 16 can be attached to the left front upper surface cover 27 using the other bolts 32. In this case, as shown in FIG. 3, the heads 32 </ b> A of the other bolts 32 project on the outer surface 27 </ b> A side of the left front upper surface cover 27. However, since the head 32A of the other bolt 32 is disposed at a position away from the lower end of the engine cover 25 in the closed position, the head 32A of the other bolt 32 is a seal 25C of the engine cover 25. Will not interfere with
　かくして、本実施の形態によれば、エンジンカバー２５が閉位置となったときに、このエンジンカバー２５のシール材２５Ｃが当接する部位にボルト挿通孔２７Ｄを設け、左前上面カバー２７の内面２７Ｂ側には、ボルト挿通孔２７Ｄと対応する位置にボルト頭部受け座２８を設けている。このため、左前上面カバー２７の内面２７Ｂ側にボルト３１，３２を用いてエアクリーナ１４を取付けるときに、ボルト３１の頭部３１Ａは、左前上面カバー２７とボルト頭部受け座２８との間に形成されたボルト頭部収容空間２９内に収容することができる。この結果、ボルト３１の頭部３１Ａは、ボルト頭部収容空間２９内に隠蔽され、左前上面カバー２７の外面２７Ａ側に突出するのを確実に抑えることができる。従って、エンジンカバー２５が閉位置となったときに、エンジンカバー２５のシール材２５Ｃがボルト３１の頭部３１Ａと干渉して損傷するのを回避することができる。 Thus, according to the present embodiment, when the engine cover 25 is in the closed position, the bolt insertion hole 27D is provided in the portion of the engine cover 25 in contact with the seal member 25C. A bolt head seat 28 is provided at a position corresponding to the bolt insertion hole 27D. Therefore, when attaching the air cleaner 14 to the inner surface 27B side of the left front upper surface cover 27 using the bolts 31, 32, the head 31A of the bolt 31 is formed between the left front upper surface cover 27 and the bolt head seat 28 It can be accommodated in the bolt head accommodation space 29. As a result, the head 31 </ b> A of the bolt 31 is concealed in the bolt head accommodation space 29, and the projection on the outer surface 27 </ b> A side of the left front upper surface cover 27 can be reliably suppressed. Therefore, when the engine cover 25 is in the closed position, it is possible to prevent the seal 25C of the engine cover 25 from interfering with the head 31A of the bolt 31 and damaging it.
　なお、上述した実施の形態では、左前上面カバー２７に１個のボルト頭部受け座２８を設け、左前上面カバー２７にエアクリーナ１４を取付ける４本のボルトのうち、１本のボルト３１の頭部３１Ａのみを、左前上面カバー２７とボルト頭部受け座２８との間のボルト頭部収容空間２９に収容した場合を例示している。しかし、本発明はこれに限るものではなく、例えば左前上面カバー２７に４個のボルト頭部受け座２８を設け、ボルト３１の頭部３１Ａと、３本の他のボルト３２の頭部３２Ａとを、左前上面カバー２７と各ボルト頭部受け座２８との間のボルト頭部収容空間２９に収容してもよい。 In the embodiment described above, the head of one bolt 31 among the four bolts for attaching the air cleaner 14 to the left front upper surface cover 27 is provided with the one bolt head seat 28 on the left front upper surface cover 27. The case where only 31A is accommodated in the bolt head accommodation space 29 between the left front upper surface cover 27 and the bolt head seat 28 is illustrated. However, the present invention is not limited to this, and for example, the left front upper surface cover 27 is provided with four bolt head receptacles 28, and the head 31A of the bolt 31 and the heads 32A of three other bolts 32. May be accommodated in the bolt head accommodation space 29 between the left front upper surface cover 27 and each bolt head seat 28.
　上述した実施の形態では、外装カバー１７の内面側に配置される付属部品としてエアクリーナ１４を例示したが、本発明はこれに限らず、例えば吸気配管類、燃料フィルタ、エンジンオイルフィルタ、リザーブタンク、工具箱等を適用してもよい。 In the embodiment described above, the air cleaner 14 is illustrated as an accessory component disposed on the inner surface side of the exterior cover 17, but the present invention is not limited thereto. For example, intake piping, fuel filter, engine oil filter, reserve tank, A tool box or the like may be applied.
　上述した実施の形態では、ボルト頭部受け座２８の枠体２８Ａを、底面２８Ａ１と一対の側面２８Ａ２とにより断面Ｕ字型に形成した場合を例示している。しかし、本発明はこれに限らず、例えば有底な筒状の枠体によってボルト頭部受け座を構成してもよい。 In the embodiment described above, the case where the frame 28A of the bolt head seat 28 is formed in a U-shaped cross section by the bottom surface 28A1 and the pair of side surfaces 28A2 is illustrated. However, the present invention is not limited to this, and for example, the bolt head receiving seat may be configured by a bottomed cylindrical frame.
　なお、実施の形態では、ボルト挿通孔２７Ｄは、エンジンカバー２５のシール材２５Ｃと当接する位置に設けたが、ボルト挿通孔２７Ｄは、シール材２５Ｃよりも内側に設けてもよい。即ち、ボルト挿通孔２７Ｄは、閉位置となったエンジンカバー２５によって閉塞される位置に配置されればよいものである。 In the embodiment, the bolt insertion hole 27D is provided at a position in contact with the seal member 25C of the engine cover 25, but the bolt insertion hole 27D may be provided inside the seal member 25C. That is, the bolt insertion hole 27D may be disposed at a position closed by the engine cover 25 in the closed position.
　さらに、上述した実施の形態では、建設機械として前輪２Ａおよび後輪２Ｂを備えたホイール式油圧ショベル１を例に挙げて説明している。しかし、本発明はこれに限るものではなく、例えばクローラ式の下部走行体を備えた油圧ショベルに適用してもよく、さらに、油圧クレーン、ホイールローダ等の他の建設機械にも広く適用することができる。 Furthermore, in the embodiment described above, the wheel type hydraulic shovel 1 provided with the front wheel 2A and the rear wheel 2B as a construction machine is described as an example. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic shovel provided with a crawler type lower traveling body, and further widely applied to other construction machines such as a hydraulic crane and a wheel loader. Can.
　１　ホイール式油圧ショベル（建設機械）
　２　下部走行体（車体）
　３　上部旋回体（車体）
　１０　エンジン(原動機）
　１４　エアクリーナ（付属部品）
　１５，１６　ブラケット
　１５Ｅ，１６Ｅ　ナット
　１７　外装カバー
　２４　作業用開口
　２５　エンジンカバー（原動機カバー）
　２５Ａ　枠部
　２５Ｂ　蓋部
　２５Ｃ　シール材
　２７　左前上面カバー
　２７Ａ　外面
　２７Ｂ　内面
　２７Ｄ　ボルト挿通孔
　２７Ｅ　貫通孔
　２８　ボルト頭部受け座
　２８Ａ　枠体
　２８Ａ３　軸部挿通孔
　２８Ｂ　筒体
　２９　ボルト頭部収容空間
　３１　ボルト
　３１Ａ，３２Ａ　頭部
　３１Ｂ，３２Ｂ　軸部
　３１Ｂ１，３２Ｂ１　ねじ部
　３２　他のボルト One-wheel hydraulic excavator (construction machine)
2 Lower body (body)
3 Upper revolving body (car body)
10 engine (motor)
14 Air cleaner (accessory parts)
15, 16 Brackets 15E, 16E Nuts 17 Exterior Cover 24 Working Opening 25 Engine Cover (Motor Motor Cover)
25A Frame portion 25B Cover portion 25C Sealing material 27 Left front upper surface cover 27A Outer surface 27B Inner surface 27D Bolt insertion hole 27E Through hole 28 Bolt head seat 28A Frame body 28A3 Shaft portion insertion hole 28B Tube body 29 bolt head accommodation space 31 bolt 31A , 32A Head 31B, 32B Shaft 31B1, 32B1 Thread 32 Other bolt

Claims (7)

  1. 　自走可能な車体（２，３）と、該車体（２，３）に搭載された原動機（１０）を含む搭載機器と、該搭載機器を覆って前記車体に設けられた外装カバー（１７）と、該外装カバー（１７）の内面側に位置して配置され前記搭載機器（１０）の一部を構成する付属部品（１４）とを備えてなる建設機械において、
    　前記外装カバー（１７）には、前記付属部品（１４）を取付けるボルト（３１）の頭部（３１Ａ）と軸部（３１Ｂ）が挿通されるボルト挿通孔（２７Ｄ）を設け、
    　前記外装カバー（１７）の内面側には、該ボルト挿通孔（２７Ｄ）に対応した位置に配置され前記ボルト（３１）の軸部（３１Ｂ）が挿通される軸部挿通孔（２８Ａ３）を有すると共に前記ボルト（３１）の頭部（３１Ａ）を受けるボルト頭部受け座（２８）を設け、
    　該ボルト頭部受け座（２８）と前記外装カバー（１７）との間には、前記ボルト（３１）の頭部（３１Ａ）を収容するボルト頭部収容空間（２９）を形成し、
    　前記付属部品（１４）は、前記ボルト挿通孔（２７Ｄ）を介して前記ボルト頭部受け座（２８）の軸部挿通孔（２８Ａ３）に挿通された前記ボルト（３１）を用いて前記外装カバー（１７）の内面側に取付ける構成とし、
    　前記ボルト（３１）を用いて前記付属部品（１４）を取付けた状態では、前記ボルト（３１）の頭部（３１Ａ）は前記ボルト頭部収容空間（２９）内に収容される構成としたことを特徴とする建設機械。     A mounted device including a self-propelled vehicle body (2, 3) and a motor (10) mounted on the vehicle body (2, 3), and an exterior cover (17) provided on the vehicle body to cover the mounted device And a component (14) disposed on the inner surface side of the exterior cover (17) and constituting a part of the mounted device (10).
    The exterior cover (17) is provided with a bolt insertion hole (27D) through which a head (31A) and a shaft (31B) of a bolt (31) for attaching the accessory (14) are inserted.
    The inner surface side of the exterior cover (17) has a shaft portion insertion hole (28A3) disposed at a position corresponding to the bolt insertion hole (27D) and into which the shaft portion (31B) of the bolt (31) is inserted. And a bolt head seat (28) for receiving the head (31A) of the bolt (31)
    Between the bolt head seat (28) and the exterior cover (17), a bolt head accommodation space (29) for accommodating the head (31A) of the bolt (31) is formed;
    The accessory (14) uses the bolt (31) inserted into the shaft insertion hole (28A3) of the bolt head seat (28) through the bolt insertion hole (27D), and the outer cover It is attached to the inner side of (17),
    In a state where the accessory (14) is attached using the bolt (31), the head (31A) of the bolt (31) is configured to be accommodated in the bolt head accommodation space (29). Construction machines characterized by
  2. 　前記外装カバー（１７）の上面側には、前記原動機（１０）の上方を開，閉可能に覆い閉位置となったときに前記外装カバー（１７）の上面に当接する原動機カバー（２５）を設け、
    　前記ボルト挿通孔（２７Ｄ）は、前記原動機カバー（２５）が閉位置となって前記外装カバー（１７）に対して前記原動機カバー（２５）が当接したとき、前記原動機カバー（２５）によって閉塞される部位に設ける構成としてなる請求項１に記載の建設機械。     On the upper surface side of the outer cover (17), a motor cover (25) which contacts the upper surface of the outer cover (17) when the upper position of the motor (10) is covered so as to be openable and closable. Set up
    The bolt insertion hole (27D) is closed by the motor cover (25) when the motor cover (25) is in the closed position and the motor cover (25) is in contact with the exterior cover (17). The construction machine according to claim 1, wherein the construction machine is provided at a site to be treated.
  3. 　前記原動機カバー（２５）は、前記外装カバー（１７）の上面カバー（２０）に設けられた作業用開口（２４）を取囲む枠部（２５Ａ）と、該枠部（２５Ａ）の上端側を施蓋する蓋部（２５Ｂ）とにより構成され、
    　前記枠部（２５Ａ）の下端縁には全周に亘ってシール材（２５Ｃ）を設け、
    　前記ボルト挿通孔（２７Ｄ）は、前記シール材（２５Ｃ）に当接する位置に設ける構成としてなる請求項２に記載の建設機械。     The motor cover (25) has a frame (25A) surrounding a work opening (24) provided on the top cover (20) of the exterior cover (17), and the upper end side of the frame (25A) It is composed of a lid (25B) to cover the lid,
    A sealing material (25C) is provided on the lower edge of the frame (25A) over the entire circumference,
    The construction machine according to claim 2, wherein the bolt insertion hole (27D) is provided at a position in contact with the sealing material (25C).
  4. 　前記外装カバー（１７）には、前記ボルト挿通孔（２７Ｄ）の近傍で、かつ前記原動機カバー（２５）が閉位置となったときにも外部から目視し得る位置に、他のボルト（３２）の軸部（３２Ｂ）が挿通される貫通孔（２７Ｅ）を設け、
    　前記付属部品（１４）は、前記ボルト（３１）と前記貫通孔（２７Ｅ）に挿通された前記他のボルト（３２）とを用いて前記外装カバー（１７）の内面側に取付ける構成としてなる請求項２に記載の建設機械。     The external cover (17) has another bolt (32) in the vicinity of the bolt insertion hole (27D) and at a position where it can be seen from the outside even when the prime mover cover (25) is in the closed position. A through hole (27E) through which the shaft portion (32B) of the
    The accessory (14) is configured to be attached to the inner surface side of the exterior cover (17) using the bolt (31) and the other bolt (32) inserted into the through hole (27E). The construction machine of item 2.
  5. 　前記ボルト頭部受け座（２８）は、
    　前記外装カバー（１７）の内面と間隔をもって対面し前記軸部挿通孔（２８Ａ３）が穿設された底面（２８Ａ１）と該底面（２８Ａ１）から前記外装カバー（１７）に向けて突出し突出端部が前記外装カバー（１７）の内面に固着された側面（２８Ａ２）とを有する断面Ｕ字型の枠体（２８Ａ）と、
    　一端側が該枠体（２８Ａ）の底面（２８Ａ１）に固着されると共に他端側が前記付属部品（１４）に当接し前記ボルト（３１）の軸部（３１Ｂ）が挿通される軸部挿通孔（２８Ｃ）を有する筒体（２８Ｂ）とにより構成してなる請求項１に記載の建設機械。     The bolt head seat (28) is
    A bottom surface (28A1) facing the inner surface of the exterior cover (17) with a gap and having the shaft portion insertion hole (28A3) drilled and a projecting end portion projecting toward the exterior cover (17) from the bottom surface (28A1) A U-shaped frame body (28A) having a side surface (28A2) fixed to the inner surface of the exterior cover (17);
    A shaft insertion hole (one end side is fixed to the bottom surface (28A1) of the frame (28A) and the other end side is in contact with the accessory (14) and the shaft portion (31B) of the bolt (31) is inserted The construction machine according to claim 1, wherein the construction machine comprises a cylinder (28B) having 28C).
  6. 　前記付属部品（１４）には、前記ボルト（３１）の軸部（３１Ｂ）に螺設されたねじ部（３１Ｂ１）が挿通されるねじ部挿通孔（１５Ｄ１）を設けると共に、該ねじ部挿通孔（１５Ｄ１）と対向する位置に前記ボルト（３１）のねじ部（３１Ｂ１）を螺着するためのナット（１５Ｅ）を取付け、
    　前記ボルト頭部受け座（２８）の筒体（２８Ｂ）を前記付属部品（１４）に当接させた状態で、前記外装カバー（１７）の外面から前記付属部品（１４）のねじ部挿通孔（１５Ｄ１）と前記ナット（１５Ｅ）との境界部までの長さ寸法をＸとし、
    　前記ボルト頭部受け座（２８）を通じて前記ナット（１５Ｅ）に螺着される前記ボルト（３１）の軸部（３１Ｂ）の長さ寸法をＹとすると、
    　前記長さ寸法Ｙは前記長さ寸法Ｘよりも大きく設定してなる請求項５に記載の建設機械。     The accessory part (14) is provided with a screw part insertion hole (15D1) into which a screw part (31B1) screwed to the shaft part (31B) of the bolt (31) is inserted, and the screw part insertion hole Attach a nut (15E) for screwing the screw part (31B1) of the bolt (31) to the position facing the (15D1),
    The screw part insertion hole of the accessory (14) from the outer surface of the exterior cover (17) in a state where the cylinder (28B) of the bolt head support (28) is in contact with the accessory (14) Let the length dimension to the boundary part of (15D1) and the nut (15E) be X,
    Assuming that the length dimension of the shaft portion (31B) of the bolt (31) screwed to the nut (15E) through the bolt head seat (28) is Y,
    The construction machine according to claim 5, wherein the length dimension Y is set larger than the length dimension X.
  7. 　前記搭載機器は、前記原動機としてのエンジン（１０）と、前記エンジン（１０）に供給される空気中のダストを除去するエアクリーナ（１４）とを含んで構成され、
    　前記付属部品は、前記搭載機器の一部を構成する前記エアクリーナ（１４）である請求項１に記載の建設機械。     The mounted device includes an engine (10) as the prime mover, and an air cleaner (14) for removing dust in the air supplied to the engine (10).
    The construction machine according to claim 1, wherein the accessory is the air cleaner (14) which constitutes a part of the mounting device.
PCT/JP2013/078068 2012-11-08 2013-10-16 Construction machine WO2014073342A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4249688A1 (en) * 2022-03-25 2023-09-27 Yanmar Holdings Co., Ltd. Construction machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08183350A (en) * 1995-01-05 1996-07-16 Hitachi Constr Mach Co Ltd Construction machine
JP2001090109A (en) * 1999-09-22 2001-04-03 Hitachi Constr Mach Co Ltd Rotary construction machine
JP2007112369A (en) * 2005-10-24 2007-05-10 Shin Caterpillar Mitsubishi Ltd Engine hood opening and holding structure of working machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08183350A (en) * 1995-01-05 1996-07-16 Hitachi Constr Mach Co Ltd Construction machine
JP2001090109A (en) * 1999-09-22 2001-04-03 Hitachi Constr Mach Co Ltd Rotary construction machine
JP2007112369A (en) * 2005-10-24 2007-05-10 Shin Caterpillar Mitsubishi Ltd Engine hood opening and holding structure of working machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4249688A1 (en) * 2022-03-25 2023-09-27 Yanmar Holdings Co., Ltd. Construction machine

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