JP2019070311A - Work machine - Google Patents

Abstract

To provide a work machine which can improve cooling efficiency by air taken into an air suction chamber from an air suction port.SOLUTION: A work machine comprises: a base plate 8; an engine provided on the base plate; an engine room in which the engine is disposed; an air suction chamber IR formed at one side of the engine room in a width direction of the base plate; a cooling device 14 disposed in the air suction chamber; and a cover 32 covering a lateral side in one side of the air suction chamber. The cover comprises an air suction port 71 at a position facing a radiation surface 15a of the cooling device. A louver 90 is provided at the air suction port and is sloped downwardly toward an inside of the air suction chamber. An upper edge of the air suction port is positioned above an upper end of the radiation surface, and a lower edge of the air suction port is positioned above a lower end of radiation surface.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a backhoe or other work machine.

DESCRIPTION OF RELATED ART Conventionally, the working machine disclosed by patent document 1 is known.
The work machine disclosed in Patent Document 1 includes a substrate, an engine mounted on the substrate, a support frame provided across the front and rear of the engine, and a partition wall provided in front of the engine Have. The leg mounting portion for mounting the front leg of the support frame and the engine mounting portion for mounting the front portion of the engine are fixed to the rear surface of the partition wall.

  In the above-described conventional work machine, the leg attachment portion and the engine attachment portion are each formed by bending a metal plate, and are separately welded to the partition plate, so distortion occurs due to welding and the support The mounting accuracy of the frame and the engine may be reduced. Further, the leg mounting portion and the engine mounting portion are formed of separate bent metal plates, and therefore have low rigidity.

JP, 2011-74606, A

  The present invention has been made to solve the problems of the prior art as described above, and it is possible to improve the mounting accuracy of the support frame and the engine with a simple structure, and to mount the support frame and the engine. An object of the present invention is to provide a working machine capable of enhancing the rigidity of a part.

The present invention takes the following technical measures in order to solve the above problems.
A work machine according to an aspect of the present invention is formed on one side of a substrate, an engine provided on the substrate, an engine room in which the engine is disposed, and the width direction of the substrate than the engine room An intake chamber, a cooling device disposed in the intake chamber, and a cover covering the side of the one side of the intake chamber, the cover being located at a position facing the heat dissipation surface of the cooling device A louver provided at the intake port and inclined downward toward the inside of the intake chamber, wherein an upper edge of the intake port is positioned above an upper end of the heat dissipation surface; The lower edge of the mouth is located above the lower end of the heat dissipation surface.

  The work machine according to the present invention comprises a substrate, a first longitudinal rib provided on one side in the width direction of the substrate and extending from the front to the rear of the substrate, an engine provided on the substrate, and a front of the engine A supporting frame erected, and a support base extending forward from the other side in the width direction on the substrate forward of the engine toward the first longitudinal rib and supporting a front portion of the engine and / or a front portion of the supporting frame Is equipped. As a result, the front part of the engine and / or the front part of the support frame is supported by the support base extended from the other side in the width direction on the substrate toward the first longitudinal rib. Therefore, the assembling accuracy of the support frame and / or the engine can be improved by the simple structure.

It is a perspective view of a turning frame. It is a top view of a turning frame. It is a perspective view which shows the example of a change of a turning frame. It is a perspective view showing a revolving frame and a support frame. It is a top view which shows a turning frame and a support frame. It is a longitudinal cross-sectional view of an intake chamber. It is a perspective view of a working device. It is a perspective view of a boom tip. It is the figure which looked at the boom tip from the tip side. It is a perspective view showing a swivel and a cabin. It is a perspective view which shows the state which open | released the cover member. It is a longitudinal cross-sectional view which shows the state which a cover member exists in a closed position. It is a longitudinal cross-sectional view which shows the state which a cover member exists in an open position. It is a longitudinal cross-sectional view which shows a state in which a cover member exists in the intermediate position of a closed position and an open position. It is a left side view showing the support structure of a pilot filter. It is a right side view showing the support structure of a pilot filter. It is a left view which shows arrangement | positioning of a clamp tool. It is a perspective view which shows arrangement | positioning of a clamp tool. It is the figure which looked at the 1st clamp tool from the left. It is a partial cross section figure of the 1st clamp tool. It is a perspective view of a 2nd clamp tool. It is a left view of a working machine. It is a right view of a working machine. It is a top view of a working machine. It is a rear view of a working machine.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
22 to 25 are schematic views showing the work machine 1 according to the present invention. In the present embodiment, a backhoe which is a turning work machine is illustrated as the work machine 1.
The work machine 1 includes a machine body 2, a cabin 3, a traveling device 4, and a work device 5. Hereinafter, the front side (left side in FIG. 22) of the driver sitting in the driver's seat 6 of the cabin 3 is forward, the rear side (right side in FIG. 22) of the driver is rear, and the left side (front side of FIG. 22) The left side and the right side of the driver (the far side in FIG. 22) will be described as the right side. The horizontal direction K2 (see FIG. 25), which is a direction orthogonal to the front and rear directions K1 (see FIG. 22), will be described as the machine width direction.

  The airframe 2 has a swivel base 7 supported on the traveling device 4. The swivel base 7 is pivotally supported by the traveling device 4 via a swivel bearing (not shown) so as to be pivotable to the left and right around a pivot axis (vertical axis) in the vertical direction. The swivel base 7 has a substrate (hereinafter, referred to as a swivel substrate) 8 which pivots about a longitudinal axis, and a weight 9. The pivoting substrate 8 is formed of a steel plate or the like and is connected to the pivoting bearing. The weight 9 is provided at the rear of the swivel base 7.

  As shown in FIG. 22, FIG. 24, and FIG. 25, an engine room ER is provided at the rear of the swivel base 7. As shown in FIG. 24 and the like, an engine 10 and the like are mounted in the engine room ER. The engine 10 is disposed sideways so that the drive shaft center points in the widthwise direction of the vehicle. Hydraulic equipment is mounted on the swivel base 7. The hydraulic device includes a hydraulic pump 11 and a control valve 20. The hydraulic pump 11 is provided on the left side of the engine 10. The hydraulic pump 11 has a main pump 11A and a pilot pump 11B. The main pump 11A supplies hydraulic oil to various hydraulic actuators (hydraulic cylinders, hydraulic motors, etc.) equipped in the work machine 1. The pilot pump 11B supplies hydraulic oil (pilot oil) that applies a pilot pressure to a control valve 20 described later. A cooling fan 12 is provided on the right of the engine 10. The periphery of the cooling fan 12 is surrounded by a shroud 13. The hydraulic pump 11 and the cooling fan 12 are driven by the engine 10. The cooling fan 12 generates an air flow from the right to the left. A radiator 14 is provided to the right of the cooling fan 12 to cool the cooling water supplied to the engine 10. An oil cooler 15 for cooling the hydraulic oil is provided on the right side of the radiator 14.

As shown in FIG. 24, a side room TR is provided on the right side of the swivel base 7. A hydraulic oil tank 16 is mounted in the side room TR. The hydraulic oil tank 16 is disposed in front of the radiator 14 and the oil cooler 15. The hydraulic oil tank 16 stores hydraulic oil supplied to each hydraulic actuator provided to the work machine 1.
As shown in FIGS. 22 to 25, the upper side, the right side, the left side and the rear side of the engine room ER are covered by a cover 30. The cover 30 has a left cover 31, a right cover 32, a rear cover 33, and a front cover 34. The left cover 31 covers the left side of the engine room ER. The right cover 32 covers the right side of the engine room ER. The rear cover 33 is provided between the left cover 23 and the right cover 24 and covers the rear of the engine room ER. The front cover 34 is provided in front of the rear cover 33 and covers the upper side of the engine room ER. As shown in FIG. 23 and FIG. 25, the right cover 24 is provided with an annular first edge 71 which forms an air inlet which will be described later.

As shown in FIGS. 22-24, the side of the swivel base 7 is covered by a side cover. The side cover has a first side cover 35, a second side cover 36, and a third side cover 37.
As shown in FIGS. 23 and 24, the first side cover 35 and the second side cover 36 cover the side room TR. The first side cover 35 covers the upper side of the side room TR. The second side cover 36 covers the right side of the side room TR. As shown in FIGS. 22 and 24, the third side cover 37 covers the lower portion of the left side surface of the swivel base 7. The third side cover 37 extends forward from the front edge of the weight 9 and is located below the cabin 3.

As shown in FIG. 22 to FIG. 25, the cabin 3 is mounted on the left front on the turning base 8. Inside the cabin 3, a driver's seat 6, a travel lever 86 and the like are provided.
The traveling device 4 is a crawler-type traveling device. As shown in FIG. 24 and FIG. 25, the traveling devices 4 are respectively provided on the lower side of the right side and the left side of the machine body 2. The traveling device 4 is driven by a hydraulic motor (not shown). As shown in FIGS. 22 to 24, a dozer 25 is provided at the front of the traveling device 4. The dozer 25 swings up and down by the drive of the dozer cylinder 26.

  As shown in FIG. 24, a support bracket 21 is provided at the front of the swivel base 7. The swing bracket 22 is attached to the support bracket 21. The swing bracket 22 is swingably supported around a longitudinal axial center with respect to the support bracket 21. Swinging of the swing bracket 22 is performed by expansion and contraction of a swing cylinder (not shown) mounted on the swivel base 6. The work device 5 is attached to the swing bracket 22.

  As shown in FIG. 23, the working device 5 has a boom 17, an arm 18 and a working tool 19. The work apparatus further includes a boom cylinder 27, an arm cylinder 28, and a work implement cylinder 29 as a drive mechanism (hydraulic actuator etc.) of the boom 17, the arm 18, and the work implement 19. The boom cylinder 27, the arm cylinder 28, the work implement cylinder 29, and the swing cylinder are constituted by hydraulic cylinders.

  The boom 17 is provided so as to be pivotable about a horizontal axis with respect to the pivoting substrate 8. Specifically, the base end of the boom 17 is pivotally supported by the swing bracket 22 about a lateral axis. The proximal end of the arm 18 is pivotally supported about the lateral axis with respect to the distal end of the boom 17. A work tool 19 is attached to the tip of the arm 18. The boom 17 swings up and down by expansion and contraction of the boom cylinder 27. The arm 18 swings up and down by extension and contraction of the arm cylinder 28. The work tool 19 performs a squat dump operation by the expansion and contraction of the work tool cylinder 29. In the present embodiment, a bucket is mounted as the work tool 19, but instead of or in addition to the bucket, another work tool (hydraulic attachment) can be mounted. As other working tools, a hydraulic breaker, a hydraulic crusher, an angle bloom, an earth auger, a pallet fork, a sweeper, a mower, a snow blower, etc. can be exemplified.

As shown in FIGS. 22 and 24, a control valve 20 is provided at the left front of the swivel base 7. Specifically, the control valve 20 is horizontally mounted on the left front of the pivoting substrate 8. The control valve 20 integrates a plurality of valves for controlling various hydraulic actuators provided in the work machine 1. The plurality of valves are a control valve for the swing cylinder, a control valve for the boom cylinder 27, a control valve for the arm cylinder 28, a control valve for the work implement cylinder 29, a valve for control of the hydraulic motor of the traveling device 4, a swivel base They are a control valve of a hydraulic motor that turns 7, a control valve of the dozer cylinder 26, a control valve of an SP (service port) described later that controls hydraulic attachments of other work tools, and the like. Each valve is a direct acting spool type switching valve, and is arranged in a direction orthogonal to the longitudinal direction (the operating direction of the spool). The spools of each valve move in the back and forth direction.
<Board>
An upper structure which constitutes a swing frame by being integrated with the swing substrate 8 is provided on the swing substrate 8. The upper structure is connected to the turning substrate 8 by welding. Further, members constituting the upper structure are connected by welding or the like.

As shown in FIGS. 1 and 2, the upper structure includes a first longitudinal rib 51, a second longitudinal rib 52, a partition plate 53 (see FIG. 1), a support 54, a rear frame 55, a support 56, and a support 57. have.
The first longitudinal rib 51 and the second longitudinal rib 52 are provided at intervals in the machine body width direction. The first vertical rib 51 is provided on one side (right side) in the width direction (the same as the machine width direction) of the turning base 5. The second vertical rib 52 is provided on the other side (left side) in the width direction of the turning substrate 8. The first longitudinal rib 51 and the second longitudinal rib 52 are extended on the turning base 8 from the front to the rear.

  The first longitudinal rib 51 has a front rib 51F and a rear rib 51R. The front end of the front rib 51 F is connected to the support bracket 21. The rear end of the front rib 51F is located on the right in the engine room ER. The front portion of the rear rib 51R is located in front of the partition plate 53 and to the left of the rear portion of the front rib 51F. The front portion of the rear rib 51R and the rear portion of the front rib 51F overlap, and are connected at the overlapping portion. The rear end of the rear rib 51 </ b> R is connected to the right front of the rear frame 55.

  The second longitudinal rib 52 has a front rib 52F and a rear rib 52R. The front end of the front rib 52F is connected to the support bracket 21. The rear end of the front rib 52F is located at the left in the engine compartment ER. The front of the rear rib 52R is located in front of the partition plate 53 and to the left of the rear of the front rib 52F. The front portion of the rear rib 52R and the rear portion of the front rib 52F overlap and are connected at the overlapping portion. The rear end of the rear rib 52R is connected to the left front of the rear frame 55.

  The partition plate 53 is provided in front of the engine 10 and extends in the vehicle width direction. As shown in FIG. 1, the partition plate 53 has a lower plate 53D and an upper plate 53U. The lower portion of the lower plate 53D is connected to the upper surface of the pivoting substrate 8. The upper plate 53U is connected to the upper portion of the lower plate 53D. The right end portion of the lower plate 53D is connected to the left side surface of the rear rib 51R of the first longitudinal rib 51. The front rib 52F and the rear rib 52R of the second longitudinal rib 52 penetrate the left portion of the lower plate 53D from the front toward the rear. A front extension plate 53F extending forward is connected to the front left end of the lower plate 53D.

The support 54 is provided on the right side on the pivoting substrate 8. The support 54 supports the hydraulic fluid tank 16 mounted on the pivoting substrate 8 from below. The support 54 is connected to the first longitudinal rib 51. As shown in FIG. 1, the support 54 includes an upper plate 54A, a first vertical plate 54B, and a second vertical plate 54C.
The upper plate 54 </ b> A receives the lower surface of the hydraulic oil tank 16 by abutting on the lower surface of the hydraulic oil tank 16. The upper plate 54A is provided above the pivoting substrate 8 and at a distance from the upper surface of the pivoting substrate 8. The first vertical plate 54B extends from the right side of the first partition plate 53 to the right. The first vertical plate 54B divides the side room TR and an intake chamber IR described later. The left end portion of the first vertical plate 54B is connected to the right side surface of the front rib 51F of the first vertical rib 51. The second vertical plate 54C has a front portion extending in the vehicle width direction in front of the first vertical plate 54B, and a right portion extending rearward from the right end of the front portion. The first vertical plate 54B is connected to the right portion. The lower surface of the upper plate 54A is connected to the upper portion of the front rib 51F, the upper portion of the rear rib 51R, the upper portion of the first vertical plate 54B, and the upper portion of the second vertical plate 54C.

  The rear frame 55 is provided at the rear on the pivoting board 8. The rear frame 55 has a front plate 55F, an upper plate 55U, a rear plate 55R, and an attachment portion 55A. The front plate 55F is extended in the machine width direction. The rear end portion of the rear rib 51R of the first vertical rib 51 is connected to the right front portion of the front plate 55F. The rear end portion of the rear rib 52R of the second vertical rib 52 is connected to the left front portion of the front plate 55F. The upper plate 55U is provided near the center in the width direction of the vehicle, and extends rearward from the upper rear surface of the front plate 55F. The rear plate 55R connects the lower surface of the upper plate 55U and the upper surface of the turning substrate 8. The mounting portion 55A is a portion for mounting support brackets 83 and 84 (described later) for supporting the engine 10. Two mounting portions 55A are provided between the rear rib 51R and the rear rib 52R at intervals in the machine width direction. The right mounting portion 55A protrudes upward and forward from the front right portion of the front plate 55F. The left mounting portion 55A protrudes upward and forward from the front left portion of the front plate 55F. The right and left portions of the front plate 55F and the rear plate 55R are provided with holes for attaching the weight 9.

The support 56 supports the front of the engine 10 and / or the front of the support frame 64 (described later). In the present embodiment, the support base 56 supports both the front of the engine 10 and the front of the support frame 64, but may be configured to support only one of them.
As shown in FIG. 1, the support base 56 has a leg 56a, a plate 56b, and an intermediate leg 56c. The leg portion 56a is connected to the upper surface on the other side (left side) in the width direction of the swing substrate 8 (specifically, the upper surface near the other end in the width direction of the swing substrate 8) It is set up. The plate portion 56 b is extended from the upper end of the leg portion 56 a to one side (right side) in the width direction of the turning base plate 8. The upper surface of the plate portion 56 b is disposed in parallel with the upper surface of the pivoting substrate 8. In the present embodiment, the plate portion 56 b is formed by bending a strip-like metal plate into an L shape. Thus, the leg portion 56a and the plate portion 56b are integrally formed. The leg 56a and the plate 56b are preferably integrally formed (formed by one member) from the viewpoint of reduction of the number of parts and strength, but the leg 56a and the plate 56b are separate members And may be integrated by welding or the like.

  The front of the leg 56a and the front of the plate 56b are connected (welded) to the rear surface of the partition plate 53 (lower plate 53D). However, only one of the front portion of the leg portion 56a and the front portion of the plate portion 56b may be connected (welded) to the rear surface of the partition plate 53 (lower plate 53D). The right end portion of the plate portion 56b is connected to the first vertical rib 51 (rear rib 51R). In the present embodiment, the right end portion of the plate portion 56b is placed on the upper surface of the first vertical rib 51 (rear rib 51R) and connected (welded) to the upper surface.

  The connection form between the right end portion of the plate portion 56b and the first vertical rib 51 (rear rib 51R) is not limited to the form shown in FIG. 1 and FIG. FIG. 3 shows a modification of the connection form. In this modification, the plate portion 56b has a bent portion 56d bent downward at one end (right end). The bent portion 56 d is connected to the left side surface of the first vertical rib 51 (rear rib 51 R) and the rear surface of the partition plate 53. In this modification, a distance D may be provided between the lower end of the bending portion 56d and the upper surface of the turning base 8 (see FIG. 3), or the lower end of the bending portion 56d abuts on the upper surface of the turning base 8 May be In the former case (when opening the distance D), when connecting (welding) the plate portion 56b and the left side surface of the rear rib 51R, adjust the height of the connection portion (height of the plate portion 56b with respect to the rear rib 51R) It is possible to Thereby, even when there is a gap between the height of the rear rib 51R and the height of the leg 56a, the upper surface of the plate 56b can be arranged horizontally. In the latter case (in the case of contact), the strength (rigidity) of the support base 56 can be enhanced by connecting the lower end of the bent portion 56 d and the upper surface of the turning substrate 8.

  As shown in FIG. 1, the intermediate leg 56c is disposed between the leg 56a of the plate 56b and the first longitudinal rib 51 (rear rib 51R). The intermediate leg 56 c connects the lower surface of the plate portion 56 b and the upper surface of the pivoting substrate 8. Thus, the plate portion 56b is supported on the turning base 8 by the first longitudinal rib 51, the partition plate 53, and the intermediate leg 56c. Therefore, the plate portion 56 b has high strength (rigidity) with respect to the load from above. In the present embodiment, one intermediate leg 56c is provided, but a plurality of intermediate legs 56c may be provided.

  The plate portion 56 b has a first fixing portion 61 and a second fixing portion 62. However, the plate portion 56 b may have only one of the first fixing portion 61 and the second fixing portion 62. As described later, brackets (support brackets 81 and 82) for supporting the front portion of the engine 10 are fixed to the first fixing portion 61. The first fixing portion 61 has a right fixing portion 61R provided on the right portion of the plate portion 56b and a left fixing portion 61L provided on the left portion of the plate portion 56b. The right fixing portion 61R and the left fixing portion 61L each have a plurality of (two) through holes. The plurality of through holes are provided at intervals in the machine width direction.

Front legs 65 and 66 of a support frame 64 described later are fixed to the second fixing portion 62. The second fixing portion 62 has a right fixing portion 62R provided on the right side of the right fixing portion 61R, and a left fixing portion 62L provided on the left side of the left fixing portion 61L. The right fixing portion 62R and the left fixing portion 62L each have a plurality of (two) through holes.
The post 57 supports a floor seat 58 (described later) provided below the driver's seat 6. As shown in FIGS. 1 and 2, the support post 57 is provided in front of the partition plate 53 and to the left of the second longitudinal rib 52. The post 57 has a right post 57R and a left post 57L. The right support 57R and the left support 57L are provided at a distance in the vehicle width direction.

As shown in FIG. 1 and FIG. 2, the pivoting substrate 8 has a plurality of annular edges forming an opening. The annular edge has a second edge 72 and a third edge 73. The second edge 72 and the third edge 73 are provided below the engine room ER.
As shown in FIG. 1, the second edge 72 is a region surrounded by the partition plate 53, the rear rib 51R of the first longitudinal rib 51, the rear rib 52R of the second longitudinal rib 52, and the front plate 55F of the rear frame 55. It is formed in the first region. The engine 10 is disposed in the first area. The second edge 72 forms an opening below the engine 10 substantially throughout the first region.

  The third edge 73 is provided to the left of the first region. Specifically, the third edge 73 is formed in a region (referred to as a second region) surrounded by the partition plate 53, the rear rib 52R of the second longitudinal rib 52, and the front plate 55F of the rear frame 55. The hydraulic pump 11 is disposed in the second area. The third edge 73 forms an opening below the hydraulic pump 11 over substantially the entire second region.

A perforated plate 63 is attached to the second edge 72 and the third edge 73 to cover the opening formed by the second edge 72 and the third edge 73. The perforated plate 63 is a metal plate having a large number of small holes, and for example, a punching metal, a wire mesh or the like is used. In the present embodiment, a punching metal having an opening ratio of about 60 to 70% is used.
As described above, the heat generated in the engine room ER is formed by the second edge 72 and the third edge 73 by providing the second edge 72 and the third edge 73 on the revolving base 8 It can discharge | emit from the opening to the exterior (below the turning board | substrate 8). In addition, by attaching the perforated plate 63 covering the opening formed by the second edge 72 and the third edge 73, it is possible to prevent the projection of a rock or the like on the ground from intruding from the opening. It is broken. Therefore, damage to the oil pan or the like of the engine 10 due to the projection or the like can be avoided. In addition, since the wind noise is reduced, the noise given to the surroundings can also be reduced.
<Support frame>
As shown in FIGS. 4 and 5, a support frame 64 is provided on the turning substrate 8. The support frame 64 supports the rear of the cabin 3 and the cover 30. The support frame 64 has a right front leg 65, a left front leg 66, a rear leg 67, a connecting plate 68, and a rear edge 69.

  The right front leg 65 has a base 65a, an upright portion 65b, an inclined portion 65c, and a rear extension 65d. The substrate 65 a is fixed on the plate portion 56 b of the support 56. Specifically, the substrate 65a is fixed to the right fixing portion 62R of the second fixing portion 62 by a bolt. The rising portion 65 b is rising upward from the upper surface of the substrate 65 a. The inclined portion 65c extends rearward and upward from the upper end of the upright portion 65b. The rear extension 65d extends rearward from the upper end of the inclined portion 65c.

  The left front leg 66 has a base 66a, an upright portion 66b, an inclined portion 66c, a rear extension 66d, a hanging portion 66e, a connecting portion 66f, and a support portion 66g. The substrate 66 a is fixed on the plate portion 56 b of the support 56. Specifically, the substrate 66 a is fixed to the left fixing portion 62 L of the second fixing portion 62 by a bolt. The rising portion 66b is rising upward from the upper surface of the substrate 66a. The inclined portion 66c extends rearward and upward from the upper end of the rising portion 66b. The rear extension 66d extends rearward from the upper end of the slope 66c. The hanging portion 66e extends downward from the rear end of the rear extension 66d. The connecting portion 68 extends rearward from the vicinity of the boundary between the rising portion 66b and the inclined portion 66c, and is connected to the hanging portion 66e. The support portion 66g is a portion for supporting the front portion of the left cover 31, and extends from the rising portion 65b toward the left.

  The rear leg 67 includes a substrate 67a, an upright portion 67b, and a front extending portion 67c. The substrate 67 a is fixed to the upper surface of the upper plate 55 U of the rear frame 55 by a bolt. The upright portion 67 b extends upward from the upper surface of the substrate 67 a. The front extending portion 67 extends forward from the upper end of the rising portion 67 b. The front extension portion 67 c of the rear leg 67, the rear extension portion 65 d of the right front leg 65, and the rear extension portion 66 d of the left front leg 66 support the front cover 34.

The contact plate 68 communicates the top surface of the rear extension 65 d of the right front leg 65, the top surface of the rear extension 66 d of the left front leg 66, and the front extension 67 c of the rear leg 67. The communication plate 68 supports the rear of the cabin 3.
The rear edge 69 connects the rear extension 65 d of the right front leg 65 and the rear extension 66 d of the left front leg 66. The rear edge 69 supports the top of the rear cover 33.
<Support bracket for engine>
As shown in FIG. 5, the engine 10 is supported on the turning base 8 by four brackets (a first support bracket 81, a second support bracket 82, a third support bracket 83, and a fourth support bracket 84).

  As shown in FIG. 5, the first support bracket 81 is attached to the right front of the engine 10. The second support bracket 82 is attached to the left front of the engine 10. The first support bracket 81 is fixed to the right fixing portion 61R of the first fixing portion 61 of the support base 56 by a bolt or the like. The second support bracket 82 is fixed to the left fixing portion 61 L of the first fixing portion 61 of the support base 56 by a bolt or the like. Thus, the front portion of the engine 10 is supported by the plate portion 56 b of the support base 56 via the first support bracket 81 and the second support bracket 82.

  As shown in FIG. 5, the third support bracket 83 is attached to the right rear of the engine 10. The fourth support bracket 84 is attached to the left rear of the engine 10. The third support bracket 83 is fixed to the right mounting portion 55A of the rear frame 55 by a bolt or the like. The fourth support bracket 84 is fixed to the left mounting portion 55A of the rear frame 55 by a bolt or the like. Thus, the rear portion of the engine 10 is supported by the mounting portion 55A of the rear frame 55 via the third support bracket 83 and the fourth support bracket 84.

As described above, the support 50 supports the first fixing portion 61 and / or the support frame 64 (the right front leg 65) for fixing the brackets (the first support bracket 81 and the second support bracket 82) that support the front portion of the engine 10. And a second fixing portion 62 for fixing the front portion of the left front leg 66). Further, the support 50 is connected to the pivoting substrate 8 and the first vertical rib 51.
Conventionally, the mounting portion for fixing the bracket for supporting the engine and the mounting portion for fixing the bracket for supporting the support frame are formed from separate members and are separately welded to the partition plate. Therefore, distortion may occur due to welding, which may reduce the mounting accuracy of the engine and the support frame.

On the other hand, in the present embodiment, the front part of the engine 10 and / or the front part of the support frame 64 is extended from the other side in the width direction on the turning base 8 toward the first longitudinal rib 51 The structure is supported by the table 56. Therefore, the assembling accuracy of the support frame 64 and / or the engine 10 can be improved by the simple structure. In particular, a bracket (first support bracket 81 and second support bracket 82) for supporting the front portion of the engine 10 and the support frame 64 on the same surface (upper surface of the plate portion 56 b) of one member (support base 56) By fixing the front portion (the right front leg 65 and the left front leg 66), the occurrence of distortion due to welding can be suppressed, and the assembling accuracy of the engine and the support frame can be improved. Further, by connecting the support base 56 with the turning base 8 and the first vertical rib 51, sufficient rigidity can be secured.
<Intake port>
As shown in FIGS. 23 to 25, an intake chamber IR is provided on the right side of the engine room ER. As shown in FIG. 1, the intake chamber IR is provided at the rear of the vertical plate 54B and to the right of the first vertical rib 51 (rear rib 51R). The upper side, the right side and the rear side of the intake chamber IR are covered by the right cover 32.

As shown in FIGS. 6 and 24, the radiator 14 and the oil cooler 15 are disposed in the intake chamber IR. The radiator 14 and the oil cooler 15 are attached to a bracket 24 fixed to the shroud 13. The oil cooler 15 can be tilted forward with a shaft 24a provided at the lower part of the bracket 24 as a fulcrum.
The radiator 14 and the oil cooler 15 are vertically disposed such that the heat radiation surface (the surface on which the air hits by the drive of the cooling fan 12) is directed to the right and is longitudinally long. On the heat dissipation surface 15 a of the oil cooler 15, a large number of fins arranged in a substantially parallel manner with gaps in the vertical direction are provided.

  As shown in FIGS. 23 and 25, the right cover 24 is provided with a first edge 71. The first edge portion 71 forms an intake port at a position facing the heat dissipation surface 15 a of the oil cooler 15. The upper edge (upper edge of the first edge 71) of the intake port is located above the upper end of the heat dissipation surface 15a of the oil cooler 15, and the lower edge (lower edge of the first edge 71) of the intake port is , And the lower end of the heat radiation surface 15a. The lower end of the heat release surface 14 a of the radiator 14 is located below the lower end of the heat release surface 15 a of the oil cooler 15.

As shown in FIGS. 23, 25 and 6, a louver 90 is provided at the first edge 71. As shown in FIG. As shown in FIG. 6, the louver 90 has a plurality of slats 91 aligned substantially in parallel with a gap in the upper and lower direction. As shown in FIG. 23, the plurality of wing plates 91 extend in the front-rear direction and are inclined so as to shift downward as going forward. As shown in FIG. 6, the plurality of wing plates 91 slope downward toward the inside of the intake chamber IR. Therefore, the air (cold air) taken into the intake chamber IR from the intake port by the drive of the cooling fan 12 changes its direction and travels obliquely downward by passing through the gap between the adjacent slats 91 (FIG. 6 See arrow). Thereby, air (cold air) reaches the lower part of the heat dissipation surface 15a of the oil cooler 15, and can cool the entire heat dissipation surface 15a. In addition, the heat remaining in the vicinity of the lower portion of the heat dissipation surface 15a can be dissipated downward. As a result, the cooling efficiency of the oil cooler 15 can be improved. In addition, the air (cold air) can easily reach the lower portion of the heat dissipation surface 14 a of the radiator 14, so that the heat exchange efficiency of the radiator 14 can also be improved. Furthermore, by providing the louver 90 at the intake port, the intake noise is reduced, so the noise reduction effect can be obtained.
<Guide member of boom>
As shown to FIG. 7, FIG. 23, the boom 17 has the front part 17a, the rear part 17b, and the intermediate part 17c.

The middle portion 17c has an upper plate 17U, a lower plate 17D, a right side plate 17R, and a left side plate 17L, and is formed in a substantially square cylindrical shape. Four hydraulic hoses (two first hydraulic hoses 101 and two second hydraulic hoses 102) are provided in an internal space 17S surrounded by the upper plate 17U, lower plate 17D, right side plate 17R and left side plate 17L. It is inserted.
The first hydraulic hose 101 connects the control valve 20 and the work implement cylinder 29. The second hydraulic hose 102 connects a control valve for the SP (service port) of the control valve 20 and a hose joint 88 for a service port described later.

  The rear portion 17 b is provided on the proximal end side of the boom 17. The rear portion 17b is fitted into the base of the middle portion 17c. The rear portion 17b is provided with a U-shaped edge (hereinafter, referred to as a fourth edge 38) forming an insertion port 38 into which the first hydraulic hose 101 and the second hydraulic hose 102 are inserted. The insertion port 38 of the rear portion 17b and the internal space 17S of the middle portion 17c communicate with each other.

  The front portion 17 a is provided on the tip end side of the boom 17. The front portion 17a is fitted to the tip of the middle portion 17c. As shown in FIG. 8, the front portion 17 a has a cylindrical portion 171 and bearings 172 R and 172 L. The cylindrical portion 171 is fitted at the tip of the intermediate portion 17c. The cylindrical portion 171 is formed in a substantially square cylindrical shape and has a flat inner bottom surface 171a. The bearing portions 172R, 172L project forward from the cylindrical portion 171 in a bifurcated shape. The right bearing portion 172R and the left bearing portion 172L support a horizontal shaft that pivotally supports the proximal end of the arm 18. An outlet 39 for taking out hydraulic hoses (the first hydraulic hose 101 and the second hydraulic hose 102) is formed at the front of the cylindrical portion 171 and between the right bearing portion 172R and the left bearing portion 172L. An annular edge (hereinafter referred to as the fifth edge 39) is provided. The inner bottom surface 171 a is a flat surface extending rearward from the lower edge of the fifth edge 39. The outlet 39 of the front portion 17a communicates with the internal space 17S of the middle portion 17c.

  As shown in FIGS. 7 to 9, the front portion 17 a is provided with a guide member 40. The guide member 40 is a member for guiding the first hydraulic hose 101 and the second hydraulic hose 102 toward the outlet 39. In the present embodiment, the guide member 40 is formed of a cylindrical rod. The guide member 40 is fixed to the inner bottom surface 171a of the cylindrical portion 17A. Specifically, the guide member 40 is fixed to the rear of the front edge (the lower edge of the fifth edge 39) of the inner bottom surface 171a and substantially at the center in the width direction of the boom 17. The guide member 40 rises substantially vertically from the inner bottom surface 171 a and extends toward the upper edge of the fifth edge 39. The upper end of the guide member 40 may be connected to the upper edge of the fifth edge 39, but in the present embodiment, a gap is provided between the upper end of the guide member 40 and the upper edge of the fifth edge 39 . This gap is set smaller than the diameter of the hydraulic hose (the first hydraulic hose 101 and the second hydraulic hose 102). This prevents the hydraulic hose from moving past the guide member 40. That is, the guide member 40 divides the outlet 39 into two in the width direction of the boom 17. Hereinafter, with regard to the outlet 39 partitioned by the guide member 40, a portion on the right side of the guide member 40 is referred to as a right outlet 39R, and a portion on the left side of the guide member 40 is referred to as a left outlet 39L.

  As shown in FIG. 7, the first hydraulic hose 101 and the second hydraulic hose 102 are inserted from the insertion port 38 of the rear portion 17b, and are inserted into the internal space 17S of the intermediate portion 17c. Then, as shown in FIG. 9, among the hydraulic hoses inserted into the internal space 17S, the first hydraulic hose 101 is taken out from the right outlet 39R, and the second hydraulic hose 102 is taken out from the left outlet 39L. In FIG. 7 and FIG. 8, the first hydraulic hose 101 and the second hydraulic hose 102 are omitted in the right outlet 39R and the left outlet 39L.

The first hydraulic hose 101 taken out of the right outlet 39R is connected to the work implement cylinder 29. The second hydraulic hose 102 taken out of the left outlet 39L is connected to a hose joint 88 provided on the arm 18.
As shown to FIG. 7, FIG. 23, the hose coupling 88 is provided in the side (left side and right side) of the arm 18. As shown in FIG. Specifically, as shown in FIG. 7, a bracket 89 is fixed to the side surface of the arm 18, and a hose joint 88 is attached to the bracket 89. The second hydraulic hose 102 is connected to one end side (boom 17 side) of the hose joint 88. The other end side (working tool 19 side) of the hose joint 88 forms a so-called service port, and a hydraulic hose for feeding hydraulic oil is connected to an actuator for driving the other working tool.

  As described above, the first hydraulic hose 101 is guided to the right outlet 39R and the second hydraulic hose 102 is guided to the left outlet 39L by the guide member 40 provided at the tip of the boom 17. That is, two types of hydraulic hoses (the first hydraulic hose 101 and the second hydraulic hose 102) having different connection destinations are taken out from the different outlets (the right outlet 39R and the left outlet 39L) partitioned by the guide member 40. .

  Thus, in the present embodiment, the first hydraulic hose 101 and the second hydraulic hose 102 are taken out from different outlets (right outlet 39R and left outlet 39L) separated by the guide member 40. As a result, it is possible to prevent the first hydraulic hose 101 and the second hydraulic hose 102 from being in a crossed or twisted state after being assembled. Therefore, there is no possibility that the first hydraulic hose 101 and the second hydraulic hose 102 will be worn or loosened in a short period of time.

  The first hydraulic hose 101 and the second hydraulic hose 102 may be determined from which one of the right outlet 39R and the left outlet 39L to take out, in consideration of the position of the connection destination of each hydraulic hose. For example, the first hydraulic hose 101 may be taken out of the left outlet 39L, and the second hydraulic hose 102 may be taken out of the right outlet 39R. Further, one first hydraulic hose 101 and one second hydraulic hose 102 may be taken out from the right outlet 39R and the left outlet 39L, respectively.

  Further, the position at which the guide member 40 is provided is not limited to the illustrated position. For example, the guide member 40 may be raised from the front edge (lower edge of the fifth edge 39) of the inner bottom surface 171a, or may be raised from the rear of the rear edge 171b of the inner bottom surface 171a. Further, the guide member 40 is provided not in the front portion 17a of the boom 17 but in the middle portion 17c, and is raised from the inner bottom surface (upper surface of the lower plate 17D) of the middle portion 17c to face the ceiling surface (lower surface of the upper plate 17U) You may extend it. However, in consideration of the ease of assembly of the hydraulic hose, the guide member 40 is preferably provided as forward as possible (side close to the outlet 39). In addition, a plurality of guide members 40 may be provided side by side at intervals in the length direction of the boom 17. In this case, the guide member 40 can be provided on both the front portion 17a and the middle portion 17c.

Moreover, the shape of the guide member 40 can also be changed. For example, the plate-like guide member 40 may be extended rearward from the outlet 39 to divide the outlet 39 into the right outlet 39R and the left outlet 39L.
<Cover member of side cover>
As shown in FIGS. 10 and 17, a floor seat 58 is provided above the pivoting substrate 7 and above the control valve 20. The floor sheet 58 constitutes the upper surface of the swivel base 7 and the bottom of the cabin 3. As shown in FIG. 17, the floor sheet 58 has a step 59 and a back plate 60. Step 59 is located in front of and below the driver's seat 6 and covers the upper side of the control valve 20. At the front of step 59, a travel lever 86 and the like are provided. The back plate 60 is provided at the rear of the step 59. A seat 70 is provided on the rear plate 60. A driver's seat 6 is provided on the seat stand 70 via a suspension device and the like. The rear of the step 59 and the front of the rear plate 60 are supported by a right support 57R and a left support 57L (see also FIGS. 1 and 2) provided on the swivel base 8.

As shown in FIG. 22, the side between the floor sheet 58 and the turning base 8 is covered by a third side cover 37 provided on the turning base 8. As shown in FIG. 11, the third side cover 37 has a cover main body 37a, an inner plate 37b, a frame member 37c, a cover member 37d, and a key portion 37e.
As shown in FIG. 10, the cover main body 37a is extended forward from the left front of the weight 9. As shown in FIG. 11, the inner plate 37b is provided on the right side of the cover main body 37a, and extends in the front-rear direction. A space is formed between the cover main body 37a and the inner plate 37b, and the space is a tool box 111 for storing a tool 110 such as a grease gun. The cover main body 37a is formed with a recess 37f which is recessed downward from the upper edge. The frame member 37c is fixed to the recess 37f.

  The frame member 37c has an upper frame portion 37c1, a front frame portion 37c2, and a rear frame portion 37c3. A front support plate 96F is fixed to the front frame portion 37c2, and a rear support plate 96R is fixed to the rear frame portion 37c3. The front support plate 96F is fixed to the outer surface (left surface) of the front frame portion 37c2 and extends downward. The rear support plate 96R is fixed to the outer surface (left surface) of the rear frame portion 37c3 and extends downward. A stopper plate 93 described later is attached to the front lower portion of the front support plate 96F.

  The lid member 37 d is a member that opens or closes the tool box 111. The lid member 37d is attached to the frame member 37c so as to be openable and closable. A support shaft 95 is provided at the lower part of the lid member 37d. The support shaft 95 has a front support shaft 95F provided at the front lower portion of the lid member 37d and a rear support shaft 95R provided at the rear lower portion of the lid member 37d. The front support shaft 95F has an outer cylinder 97F and a central axis 98F. The rear support shaft 95R has an outer cylinder 97R and a central axis 98R. The outer cylinders 97F and 97R are cylindrical and fixed to the inner surface of the lower portion of the lid member 37d. Specifically, the outer cylinder 97F is fixed to the inner surface of the front lower portion of the lid member 37d, and the outer cylinder 97R is fixed to the inner surface of the rear lower portion of the lid member 37d. The center shaft 98F has a front portion fixed to the front support plate 96F and a rear portion passing through the outer cylinder 97F. The central axis 98R has a front portion fixed to the rear support plate 96R and a rear portion penetrating the outer cylinder 97R. The central axis 98F and the central axis 98R are arranged on the same axis. The outer cylinder 97F is rotatable around the central axis 98F. The outer cylinder 97R is rotatable around the central axis 98R. As a result, as shown by arrow A in FIG. 11, the lid member 37d can be opened and closed with the central axis 98F and the central axis 98R of the support shaft 95 as fulcrums. In other words, the support shaft 95 rotatably supports the lid member 37d between the open position (see FIGS. 11 and 14) and the closed position (see FIGS. 10 and 12). Here, since the support shaft 95 is provided at the lower part of the lid member 37d, the lid member 37d is opened downward (see FIG. 11).

  When the support shaft 95 is provided on the top of the lid 37d, the lid 37d is opened upward. In this case, when the driver checks the inside of the tool box 111, it is necessary to lower the posture and look into it, and the load on the driver is large. On the other hand, in the present embodiment, since the lid member 37d is opened downward, there is no need for the driver to look down at the lower position when checking the inside of the tool box 111. The burden is reduced.

  The key portion 37e is provided to prevent the lid member 37d from being opened against the driver's intention. As shown in FIG. 11, the key portion 37e has a locking piece 37g provided on the lid member 37d and a receiving portion 37h provided on the frame member 37b. The locking piece 37g rotates with the rotation of the key inserted into the keyhole provided on the surface (left surface) side of the lid member 37d. The receiving portion 37h has a plate shape and extends downward from the upper frame portion 37c1. The receiving portion 37 h is located on the back side (right side) of the locking piece 37 g when the lid member 37 d is closed. When the key inserted in the keyhole is rotated in the forward direction (see arrow B in FIG. 11) with the lid 37d closed, the locking piece 37g rotates and overlaps with the receiver 37g. As a result, the lid member 37d is in a locked state in which the opening is blocked. When the locking piece 37g is rotated in the reverse direction from the locked state, the locking piece 37g and the receiving portion 37h do not overlap, and the locked state is released.

As shown in FIGS. 11 to 14, a protruding piece 94 is provided on the outer peripheral surface of the outer cylinder 97 </ b> F. The protruding piece 94 protrudes outward (in a direction away from the central axis 98F) from the outer peripheral surface of the outer cylinder 97F. The tip end 94 a of the protruding piece 94 is curved in an arc shape in a plane perpendicular to the central axis 98 F. The projecting piece 94 rotates around the central axis 98F together with the outer cylinder 97F.
As shown in FIGS. 11 to 14 and the like, a plate spring 99 is attached to the front upper portion of the frame member 37 b. As shown in FIG. 12, the leaf spring 99 has an upper part 99a, a middle part 99b and a lower part 99c. The upper portion 99 a is attached to the front upper portion of the frame member 37 b by a bolt 106 and a nut 107. The middle portion 99b extends forward and downward from the lower end of the upper portion 99a. The lower portion 99c extends rearward and downward from the lower end of the middle portion 99b. The front surface of the lower portion 99 c abuts on the tip end 94 a of the projecting piece 94.

The leaf spring 99 and the projecting piece 94 constitute a biasing mechanism that biases the lid member 37d in the opening direction or in the closing direction. Hereinafter, the biasing mechanism will be described in detail.
As shown in FIG. 12, when the lid member 37d is in the closed position, the projecting piece 94 is a position projecting rearward from the outer peripheral surface of the outer cylinder 97F, and the lower portion 99c of the plate spring 99 is one end side of the arc of the tip portion 94a. Abut on. At this time, the leaf spring 99 biases the tip end portion 94a clockwise (in the direction of the arrow in FIG. 12) as viewed from the rear. Thereby, the lid member 37d is biased in the closing direction, and the closed state is maintained. Therefore, the closed state is maintained even when the key portion 37e becomes unusable and can not be locked during work or the like, and the lid member 37d can be prevented from being opened unintentionally.

  As shown in FIG. 13, when the lid member 37d is in the open position, the projecting piece 94 is a position projecting upward from the outer peripheral surface of the outer cylinder 97F, and the lower part 99c of the plate spring 99 is the other end of the arc of the tip 94a. Abuts the side. At this time, the plate spring 99 biases the tip end portion 94a in a counterclockwise direction (the direction of the arrow in FIG. 13) as viewed from the rear. Thereby, the lid member 37d is biased in the opening direction, and the open state is maintained. At this time, the projection piece 94 abuts against the stopper plate 93, whereby the lid member 37d is maintained in a substantially horizontal state, and excessive opening is prevented.

  As shown in FIG. 14, when the lid member 37 d is at an intermediate position between the closed position and the open position, the protruding piece 94 protrudes upward and rearward from the outer peripheral surface of the outer cylinder 97 F, and the lower portion of the plate spring 99 99c abuts on the midpoint M of the arc of the tip 94a. At this time, the biasing force of the plate spring 99 does not act in the direction of rotating the tip 94a. That is, the lid member 37d is not urged in either the opening direction or the closing direction.

  From the state shown in FIG. 14, when the cover member 37d is turned downward and the cover member 37d is positioned between the closed position and the intermediate position, the lower part 99c of the plate spring 99 is the midpoint of the arc of the tip 94a. Abuts between M and one end A. At this time, the leaf spring 99 biases the tip end portion 94a in the clockwise direction (the direction of the arrow C in FIG. 14) as viewed from the rear. Thereby, the lid member 37d is biased in the closing direction. The biasing force assists the driver in closing the lid 37d.

  From the state shown in FIG. 14, when the cover member 37d is turned upward and the cover member 37d is positioned between the intermediate position and the open position, the lower part 99c of the plate spring 99 is the midpoint of the arc of the tip 94a. It abuts between M and the other end B. At this time, the leaf spring 99 biases the tip end portion 94a in the counterclockwise direction (the direction of the arrow D in FIG. 14) as viewed from the rear. Thereby, the lid member 37d is biased in the opening direction. The biasing force assists the driver in opening the lid 37d.

The biasing mechanism may be any mechanism that biases the lid member 37d in the closing direction when the lid member 37d is in the closed position, and the specific configuration is not limited to the above-described configuration. For example, the biasing mechanism may be configured using a spring, a fluid pressure cylinder, or the like. Further, in the present embodiment, the biasing mechanism is provided at the front of the lid 37d, but may be provided at the rear of the lid 37d.
<Filter>
As shown in FIGS. 15 and 16, the filter 46 is attached to the connecting portion 66 f of the left front leg 66 of the support frame 64. The filter 46 cleans the hydraulic oil (pilot oil) supplied from the pilot pump 11B to the control valve 20.

  The filter (hereinafter referred to as a pilot filter) 46 has a hose connection portion to which a hose (a pilot hose) for flowing hydraulic oil (a pilot oil) is connected. The hose connection has a first hose connection 47 and a second hose connection 48. The first hose connection portion 47 is provided on one side (rear side) of the pilot filter 46. The second hose connection portion 48 is provided on the other side (front side) of the pilot filter 46.

One end of a first pilot hose 49 is connected to the first hose connection portion 47. The other end of the first pilot hose 49 is connected to the pilot pump 11B. The first pilot hose 49 extends downward and forward from the first hose connection portion 47.
One end of a second pilot hose 50 is connected to the second hose connection portion 48. The other end of the second pilot hose 50 is connected to the control valve 20 or the like. The second pilot hose 50 extends downward and forward from the second hose connection portion 48.

  The pilot filter 46 is attached to the connecting portion 66 f of the support frame 64 via the first bracket 75 and the second bracket 76. The first bracket 75 is a flat member and is interposed between the connecting portion 66 f and the pilot filter 46. The pilot filter 46 is fixed to the first bracket 75 by two fasteners (bolts) 77.

  As shown in FIG. 15, the first bracket 75 has a projecting portion that protrudes outward from the outer shape of the pilot filter 46 when viewed from the front side (left side of the airframe 2) of the pilot filter 46. Specifically, the first bracket 75 includes a first overhang portion 75a overhanging above the pilot filter 46, a second overhang portion 75b overhanging below and to the rear of the pilot filter 46, and a pilot filter And a third overhanging portion 75c overhanging to the lower side and the other side (forward side) of 46. A first recess 75d is formed between the first overhang 75a and the second overhang 75b. The first recess 75 d is recessed toward the other (forward). A second recess 75e is formed between the first overhanging portion 75a and the third overhanging portion 75c. The second recess 75e is recessed toward one side (rear).

  The second bracket 76 is a flat member and is interposed between the connecting portion 66 f and the first bracket 75. The second bracket 76 has an overhanging portion that protrudes outward from the outer shape of the pilot filter 46 when viewed from the front side of the pilot filter 46 (left side of the airframe 2). Specifically, as shown in FIG. 16, the second bracket 76 includes a fourth extension 76 a overlapping the first extension 75 a of the first bracket 75 and a fifth extension overlapping the second extension 75 b. A sixth overhang 76c overlapping the third overhang 75c, a seventh overhang 76d exposed from the first recess 75d, and an eighth overhang 76e exposed from the second recess 75e have.

Further, as shown in FIGS. 15 and 16, the second bracket 76 has a first mounting portion 79 and a second mounting portion 78.
The first attachment portion 79 is a portion for attaching the second bracket 76 to the support frame 64. In other words, the first attachment portion 79 is a portion that connects the second bracket 76 and the support frame 64. In the present embodiment, the first mounting portion 79 connects the second bracket 76 and the connecting portion 66 f of the support frame 64 with two fasteners (bolts). In the first attachment portion 79, a vibration isolation material such as a vibration isolation rubber can be interposed between the second bracket 76 and the connection portion 66f. The first attachment portion 79 is provided below the hose connection portion (the first hose connection portion 47, the second hose connection portion 48). Further, the first attachment portion 79 is provided on one side (rear side) and the other side (front side) of the pilot filter 46. One (rear) first attachment portion 79 connects the seventh overhang portion 76 d of the second bracket 76 and the connecting portion 66 f. The other (front) first mounting portion 79 connects the eighth overhang portion 76e of the second bracket 76 and the connecting portion 66f.

  The second attachment portion 78 is a portion for attaching the first bracket 75 to the second bracket 76. In other words, the second attachment portion 78 is a portion that connects the second bracket 76 and the first bracket 75. In the present embodiment, the second mounting portion 78 connects the second bracket 76 and the first bracket 75 with three fasteners (bolts). In the second attachment portion 78, an annular vibration isolation material such as vibration isolation rubber is interposed between the second bracket 76 and the first bracket 75. The second mounting portion 78 has an upper mounting portion 78U and a lower mounting portion 78D. The second mounting portion 78 mounts the first bracket 75 to the second bracket 76 with the first mounting portion 79 interposed therebetween by the upper mounting portion 78U and the lower mounting portion 78D.

The upper attachment portion 78U attaches the upper portion of the first bracket 75 to the second bracket 76. Specifically, the upper attachment portion 78U connects the first overhang portion 75a of the first bracket 75 and the fourth overhang portion 76a of the second bracket 76. The upper mounting portion 78U is provided above the first mounting portion 79.
The lower attachment portion 78D attaches the lower portion of the first bracket 75 to the second bracket 76. Specifically, the lower attachment portion 78D includes the second overhang portion 75b of the first bracket 75, the fifth overhang portion 76b of the second bracket 76, and the third overhang portion 75c of the first bracket 75 and the third overhang portion 75c. It connects with the 6th overhang part 76c of 2 bracket 76. The lower attachment portion 78D is provided below the first attachment portion 79. In the present embodiment, the lower attachment portion 78D is provided on one side (rear side) and the other side (front side) of the pilot filter 46.

  In addition, the attachment form of the 1st attachment part 79 is not limited to the attachment by a fastener, For example, other attachment forms, such as welding, may be sufficient. In the second mounting portion 78, the lower mounting portion 78D may be provided at one position, and the upper mounting portion 78U may be provided at one (rear) and the other (front) of the pilot filter 46. Further, both of the upper attachment portion 78U and the lower attachment portion 78D may be provided at two locations, one (rear) and the other (forward) of the pilot filter 46, respectively.

  As described above, the first pilot hose 49 extends downward and forward from the first hose connection portion 47, and the second pilot hose 50 extends downward and forward from the second hose connection portion 48. Therefore, the pilot filter 46 may receive a pulling force downward and forward from the first pilot hose 49 and the second pilot hose 50 due to pulsation or the like due to the feed of the pilot oil.

  Here, in the present embodiment, the first bracket 75 to which the pilot filter 46 is fixed, the first attachment portion 79 attached to the support frame 64, and the second attachment to attach the first bracket 75 with the first attachment portion 79 interposed therebetween. And a unit 78. Specifically, the second attachment portion 78 includes an upper attachment portion 78U provided above the first attachment portion 79 and a lower attachment portion 78D provided below the first attachment portion 79. Thereby, when the pilot filter 46 receives a pulling force from the first pilot hose 49 and the second pilot hose 50, this force can be received above and below the support frame 64. As a result, the pilot filter 46 does not tilt even under the above-mentioned pulling force, and therefore the bracket holding the pilot filter 46 strikes the support frame 64 and noise from the driver's ear does not occur.

In addition, since the lower attachment portion 78D or the upper attachment portion 78U is disposed at the front and the rear of the pilot filter 46, when the force for tilting the pilot filter 46 acts, this force is used as the support frame 64. It can be shared and received at the three places (upper mounting part and lower mounting part) sandwiching it. Therefore, the pilot filter 46 can be reliably prevented from being inclined and hitting the support frame 64.
<Clamp tool>
As shown in FIG. 24, the hydraulic pump 11 and the control valve 20 are connected by a third hydraulic hose 103, a fourth hydraulic hose 104, and a fifth hydraulic hose 105. The third hydraulic hose 103 and the fourth hydraulic hose 104 connect the main pump 11A and the control valve 20. The fifth hydraulic hose 105 connects the sub pump 11 B and the control valve 20. Hereinafter, the third hydraulic hose 103, the fourth hydraulic hose 104, and the fifth hydraulic hose 105 will be referred to as "third hydraulic hose 103 and the like" when collectively described.

  The third hydraulic hose 103 and the like are supported by a plurality of clamps in the middle between the hydraulic pump 11 and the control valve 20. As shown in FIGS. 17, 18 and 24, in the present embodiment, the clamp has the first clamp 112 and the second clamp 122. In FIG. 17, FIG. 18 and FIG. 24, hydraulic hoses not related to the description of the clamp are omitted for simplification of the drawings.

First, the first clamp tool 112 will be described.
As shown in FIG. 17 and FIG. 18, the first clamp tool 112 is fixed to the upper surface of the pivoting substrate 8. Specifically, the first clamp tool 112 is fixed to the upper surface of the turning base 8 between the right support 57R and the left support 57L.
As shown in FIGS. 19 and 20, the first clamp tool 112 supports a holding portion (hereinafter referred to as a first holding portion) 113 for holding the third hydraulic hose 103 and the like, and a support portion for supporting the first holding portion 113. (Hereinafter referred to as a first support portion) 114.

The first holding unit 113 holds the third hydraulic hose 103 and the like (the third hydraulic hose 103, the fourth hydraulic hose 104, and the fifth hydraulic hose 105) in the longitudinal direction. The first holding portion 113 includes a holding member 115, a pressing plate 116, a tightening member 117, a receiving member 118, and a block member 119.
The holding member 115 has a first holding member 115A and a second holding member 115B. The first holding member 115A and the second holding member 115B have a substantially rectangular parallelepiped shape, and are formed of an elastic material such as rubber. One surface of the first holding member 115A is in contact with the other surface of the second holding member 115B. The first holding member 115A has a semicircular notch on one side, and the second holding member 115B has a semicircular notch on the other side. By aligning the notch of the first holding member 115A and the notch of the second holding member 115B, a circular insertion portion through which the third hydraulic hose 103 and the like are inserted is formed. In the present embodiment, three insertion parts 131, 132 and 133 are formed. The three insertion portions are arranged side by side in the longitudinal direction. Hereinafter, the three insertion portions are referred to as a first insertion portion 131, a second insertion portion 132, and a third insertion portion 133 in order from the top. Further, when the three insertion portions are collectively described, they are referred to as “first insertion portion 131 and the like”.

The first holding member 115A has a substantially elliptical protuberance 115a on the other surface (left surface in FIG. 20). The second holding member 115B has a substantially elliptical protuberance (not shown) on one surface (right surface in FIG. 20).
As shown in FIG. 20, a recessed groove 115b is formed on the upper surface of the first holding member 115A and the lower surface of the second holding member 115B. The recessed groove 115b is extended from the other surface (left surface in FIG. 20) of the first holding member 115A toward one surface (right surface in FIG. 20) of the second holding member 115B. A block member 119 having a substantially rectangular parallelepiped shape is fitted in each of the recessed grooves 115b.

The pressing plate 116 is in contact with the other surface of the first holding member 115A. The pressure plate 116 has an elliptical opening 116a. The raised portion 115a of the first holding member 115A is fitted into the opening 116a. The right pressing plate 126R is formed to have substantially the same size as the right surface of the first holding member 115A.
The receiving member 118 includes an upper plate 118a, a lower plate 118b, and a vertical plate 118c. The vertical plate 118c is in contact with one surface of the second holding member 115B. Thus, the holding member 115 is sandwiched between the pressing plate 116 and the vertical plate 118 c. The vertical plate 118c has an oval opening (not shown), and the ridge of the second holding member 115B is fitted into the opening. The vertical plate 118c is formed to have substantially the same size as one surface of the second holding member 115B. The upper plate 118a extends from the upper end of the vertical plate 118c to the other side (the first holding member 115A side). The lower plate 118b extends from the lower end of the vertical plate 118c to the other side (the first holding member 115A side).

  The block material 119 has a first block material 119A and a second block material 119B. The first block member 119A is fitted into the concave groove 115b of the first holding member 115A. Specifically, the lower portion of the first block member 119A is fitted into the recessed groove 115b of the first holding member 115A, and the upper portion of the first block member 119A protrudes upward from the recessed groove 115b. The surface on one side of the first block member 119 </ b> A is in contact with the pressing plate 116. The upper surface of the first block member 119A is in contact with the lower surface of the upper plate 118a of the receiving member 118. The lower surface of the first block member 119A is in contact with the bottom surface of the concave groove 115b of the first holding member 115A.

  The second block member 119B is fitted into the concave groove 115b of the second holding member 115B. Specifically, the upper portion of the second block member 119B is fitted into the concave groove 115b of the second holding member 115B, and the lower portion of the second block member 119B protrudes downward from the concave groove 115b. The surface on one side of the second block member 119B (left surface in FIG. 20) is in contact with the pressing plate 116. The lower surface of the second block member 119B is in contact with the upper surface of the lower plate 118b of the receiving member 118. The top surface of the first block member 119A is in contact with the bottom surface of the concave groove 115b of the second holding member 115B.

  The block 119 (the first block 119A and the second block 119B) has a first screw hole 119a and a second screw hole 119b. The first screw holes 119a are non-through holes extending in a direction from the pressing plate 116 side toward the vertical plate 118c. The second screw holes 119b of the first block member 119A are non-through holes extending downward from the upper plate 118a side. The second screw holes 119b of the second block member 119B are non-through holes extending upward from the lower plate 118b side. A bolt 120 described later is screwed into the first screw hole 119a. A connecting member (bolt) 139 described later is screwed into the second screw hole 119b.

  The fastening member 117 has a bolt 120 and a spacer 121. The bolt 120 has an upper bolt 120U and a lower bolt 120D. The upper bolt 120U is located above the first insertion portion 131. The upper bolt 120U penetrates the upper portion of the pressing plate 116 and is screwed into a first screw hole 119a provided in the first block member 119A. The lower bolt 120D is located below the third insertion portion 133. The lower bolt 120D penetrates the lower portion of the pressing plate 116 and is screwed into the first screw hole 119a provided in the second block member 119B. A spacer 121 is interposed between the head of the bolt 120 and the presser plate 116.

By tightening the bolt 120, the first holding member 115A and the second holding member 115B are tightened in the direction in which they are in close contact. Thus, the first holding member 115A and the second holding member 115B are elastically deformed, and the third hydraulic hose 103 and the like inserted into the first insertion portion 131 and the like are tightened and held by the holding member 115.
Here, since the first insertion portion 131, the second insertion portion 132, and the third insertion portion 133 are arranged in the vertical direction, the third hydraulic hose 103, the fourth hydraulic hose 104, and the fifth hydraulic hose 105 are provided. Are held side by side in the vertical direction. Therefore, a plurality of hydraulic hoses can be held in a small space.

As shown in FIG. 18, the third hydraulic hose 103 and the like held by the holding member 115 passes between the right support 57R and the left support 57L and passes from the rear (hydraulic pump 11 side) of the pivoting board 8 to the front It extends toward (the control valve 20 side).
The first support portion 114 rotatably supports the first holding portion 113 about the longitudinal axis X. The first support portion 114 includes a bracket 138, a connection member 139, and a spacer 140.

The bracket 138 has a first attachment portion 138a, a second attachment portion 138b, and a third attachment portion 138c. The first attachment portion 138a is formed by bending a strip plate in an L shape, and includes a horizontal plate 138d and a vertical plate 138e.
As shown in FIG. 20, the horizontal plate 138d has a first through hole 138f, a second through hole 138g, and a third through hole 138h. The horizontal plate 138d has a rectangular shape, and is disposed between the right support 57R and the left support 57L such that the longitudinal direction is in the front-rear direction of the pivoting substrate 8 (see FIG. 18). The first through holes 138f, the second through holes 138g, and the third through holes 138h are provided at intervals along the longitudinal direction of the lateral plate 138d. As shown in FIG. 18, bolts 108 are inserted through the first through holes 138f and the second through holes 138g. The bolt 108 is screwed into a screw hole formed in the pivoting substrate 8. Thereby, the horizontal plate 138 d of the bracket 138 is fixed on the turning base 8. The third through hole 138 h is provided between the first through hole 138 f and the second through hole 138 g.

  The vertical plate 138e extends upward from one end (the end on the first through hole 138f side) of the horizontal plate 138d. The vertical plate 138e has a fourth through hole 138i and a fifth through hole 138j. The fourth through holes 138i and the fifth through holes 138j are holes for attaching the third line valve 160. As shown in FIGS. 17 and 18, the third line valve 160 is bolted to the front surface of the vertical plate 138e. The third line valve 160 is a three-way switching valve that enables return hydraulic fluid from the hydraulic actuator to return to the hydraulic fluid tank 16 without passing through the control valve 20 by switching operation. The third line valve 160 is located on the left of the lid 37 d of the third side cover 37. Thereby, the third line valve 160 can be accessed by opening the lid member 37.

  The second attachment portion 138b is a rectangular plate, and extends upward from the other end (the end on the third through hole 138g side) of the lateral plate 138d. The plane of the second mounting portion 138b is disposed in the direction orthogonal to the plane of the first mounting portion 138a. The second attachment portion 138 b has a sixth through hole 138 k and a seventh through hole 138 m. The sixth through hole 138 k and the seventh through hole 138 m are holes for attaching a pilot valve 161 for SP. As shown in FIG. 18, the pilot valve 161 is attached to the right surface of the second attachment portion 138b by a bolt. The pilot valve 161 is connected to a control valve for SP (service port) of the control valve 20.

The third mounting portion 138c is a substantially rectangular plate, and extends from the upper end of the second mounting portion 138b to the vertical plate 138e. The third mounting portion 138c is disposed parallel to and opposed to the lateral plate 138d. As shown in FIG. 20, an eighth through hole 138n is provided in the third attachment portion 138c. The center of the eighth through hole 138 n is coaxial with the center of the third through hole h.
The connecting member 139 has a first connecting member 139A and a second connecting member 139B. In the present embodiment, the first connection member 139A and the second connection member 139B are bolts.

  As shown in FIG. 20, the first connecting member 139A penetrates the eighth through hole 138n of the third attachment portion 138c and the upper plate 118a of the receiving member 118, and is inserted into the second through hole 119b of the first block member 119A. It is screwed together. A washer 151 and an elastic member 152 are interposed between the head of the bolt which is the first connection member 139A and the third attachment portion 138c. An elastic material 153 is interposed between the third mounting portion 138c and the upper plate 118a. The elastic members 152 and 153 have an annular shape, and are formed of anti-vibration rubber or the like.

  As shown in FIG. 20, the second connecting member 139B passes through the third through hole 138h of the lateral plate 138d and the lower plate 118b of the receiving member 118 and is screwed into the second through hole 119b of the second block member 119B. It is done. A washer 148 and an elastic member 149 are interposed between the head of the bolt which is the second connection member 139B and the lateral plate 138d. An elastic member 150 is interposed between the horizontal plate 138d and the lower plate 118b. The elastic members 149 and 150 have an annular shape, and are formed of anti-vibration rubber or the like.

  The spacer 140 has an upper spacer 140A and a lower spacer 140B. The upper spacer 140A is interposed between the washer 151 and the upper plate 118a. The lower spacer 140B is interposed between the washer 148 and the lower plate 118b. The spacer 140 is a cylindrical member formed of a rigid material such as metal. The upper spacer 140A penetrates the eighth through hole 138n and the elastic members 152 and 153. The shaft portion of a bolt, which is the first connection member 139A, passes through the inside of the upper spacer 140A. The lower spacer 140B penetrates the third through hole 138h and the elastic members 149 and 150. The shaft portion of a bolt, which is the second connection member 139B, passes through the inside of the lower spacer 140B.

  The upper spacer 140A functions to keep the distance between the washer 151 and the upper plate 118a at a certain level or more when the first connection member 139A is tightened (screwed) in the second through hole 119b of the first block member 119A. Have. When the distance between the washer 151 and the upper plate 118a is maintained at a certain level or more, when the first connection member 139A is tightened with respect to the second through hole 119b, the tightening strength becomes smaller than a certain level. As a result, the first connection member 139A and the second through hole 119b can be loosely engaged (not completely fixed) with a predetermined tightening strength or less.

  The lower spacer 140B functions to keep the distance between the washer 148 and the lower plate 118b at a certain level or more when the second connection member 139B is tightened (screwed) into the second through hole 119b of the second block member 119B. Have. When the distance between the washer 148 and the lower plate 118b is kept constant, when the second connection member 139B is tightened with respect to the second through hole 119b, the tightening strength becomes lower than a certain level. As a result, the second connection member 139B and the second through hole 119b can be loosely engaged (not completely fixed) with a predetermined tightening strength or less.

In addition, when the first connecting member 139A and the second connecting member 139B are tightened against the second through hole 119b, the elastic members 149, 150, 152, 153 are elastically deformed in the longitudinal X direction. You can adjust the strength.
As described above, the screwing between the first connecting member 139A and the second through hole 119b of the first block member 119A, and the screwing between the second connecting member 139B and the second through hole 119b of the second block member 119B , Tightening strength is less than a certain level of gentle screwing. As a result, when a force around the vertical axis X acts on the first holding portion 113, the first holding portion 113 can rotate around the vertical axis X with respect to the bracket 138. That is, the connecting member 139 (the first connecting member 139A, the second connecting member 139B) connects the first holding portion 113 to the bracket 138 so as to be rotatable about the longitudinal axis X.

  Thus, the third hydraulic hose 103 and the like held by the first holding portion 113 can be rotated about the vertical axis X by the first holding portion 113 being supported so as to be rotatable about the vertical axis X It becomes. Therefore, when the third hydraulic hose 103 and the like pulsate according to the drive of the hydraulic pump 11, the third hydraulic hose 103 and the like rotate around the vertical axis X according to the pulsation. This makes it possible to suppress the generation of noise resulting from the pulsation of the hose. In particular, the third hydraulic hose 103 and the like provided in the path from the hydraulic pump 11 to the control valve 20 has a large pulsation, so the third hydraulic hose 103 and the like are rotated about the longitudinal axis X by the first clamp tool 112. The movable support can effectively suppress the noise generation due to the pulsation of the hose.

Also, the bracket 138 of the first clamp tool 112 doubles as a member for supporting the first holding portion 113, a member for mounting the third line valve 160, and a member for mounting the SP valve 161. Therefore, the number of parts can be reduced and the installation space can be reduced.
In addition, the structure which supports the 1st holding part 113 so that rotation of the 1st holding part 113 is possible is possible to the periphery of the vertical axis X about the 1st clamp tool 112, It is not limited to the structure mentioned above. For example, the first holding portion 113 may be rotatably supported about the longitudinal axis X using a bearing. Further, the configuration of the first holding unit 113 may also be a configuration in which a plurality of hoses are aligned in the longitudinal direction and held, and the configuration is not limited to the above-described configuration.

Next, the second clamp tool 122 will be described.
The second clamp tool 122 holds a second halfway portion different from the halfway portion of the third hydraulic hose 103 or the like. Specifically, the second midway portion of the third hydraulic hose 103 or the like is held behind the first clamp tool 112 (closer to the hydraulic pump 11).
As shown in FIG. 17 and FIG. 18, the second clamp tool 122 is fixed to the front extension plate 53F of the partition plate 53 of the turning base plate 8. As shown in FIG. 21, the second clamp tool 122 holds a second pilot hose 50 and a third hydraulic hose 103 and the like (hereinafter referred to as the second pilot hose 50 and the like). And a supporting portion (hereinafter referred to as a second supporting portion) 124 for supporting the second holding portion 123.

  The second holding portion 123 holds the second pilot hoses 50 and the like in the longitudinal direction. The second holding portion 123 includes a holding member 125, a pressing plate 126, and a tightening member 127. The holding member 125 has a right holding member 125R and a left holding member 125L. The right holding member 125R and the left holding member 125L have a substantially rectangular parallelepiped shape, and are formed of an elastic material such as rubber. The left holding member 125L has a semicircular notch on the right side, and the right holding member 125R has a semicircular notch on the left side. By aligning the notch of the right holding member 125R and the notch of the left holding member 125L, a circular insertion portion through which the second pilot hose 50 and the like are inserted is formed. In the present embodiment, four insertion portions 134, 135, 136, and 137 are formed. The four insertion portions are arranged side by side in the longitudinal direction. Hereinafter, the four insertion portions are referred to as a fourth insertion portion 134, a fifth insertion portion 135, a sixth insertion portion 136, and a seventh insertion portion 137 in order from the top. Further, when the four insertion portions are collectively described, they are referred to as “fourth insertion portion 134 and the like”. Further, the left holding member 125L has a substantially elliptic raised portion 125a on the left surface, and the right holding member 125R has a substantially oval raised portion (not shown) on the right surface.

  The pressing plate 126 has a right pressing plate 126R and a left pressing plate 126L. The right pressing plate 126R is in contact with the right surface of the right holding member 125R. The left pressing plate 126L is in contact with the left surface of the left holding member 125L. Thus, the holding member 125 is sandwiched between the right pressure plate 126R and the left pressure plate 126L. The left pressure plate 126L has an elliptical opening 126a. The raised portion 125a of the left holding member 125L is fitted into the opening 126a. The right presser plate 126R also has an elliptical opening (not shown), and the raised portion of the right holding member 125R is fitted into this opening. The right pressing plate 126R is formed to have substantially the same size as the right surface of the right holding member 125R, but the left pressing plate 126L is formed to be larger than the left surface of the left holding member 125L. Specifically, the left pressing plate 126L has a rear extension portion 126b extending rearward from the left surface of the left holding member 125L. The rear extension part 126b is formed such that the extension length to the rear becomes gradually larger from the lower part to the upper part. Thus, the rear edge of the left pressing plate 126L (the rear end of the rear extension 126b) is inclined with respect to the front edge of the left pressing plate 126L.

  The tightening member 127 includes a bolt 130, a nut 141, a plate 142, a washer 143, a first elastic member 145, a second elastic member 146, and a third elastic member 147. The bolt 130 passes through the left pressing plate 126L, the left holding member 125L, the right holding member 125R, the right pressing plate 126R, and the plate 142. The bolt 130 has an upper bolt 130U and a lower bolt 130D. The upper bolt 130U penetrates the upper side of the fourth insertion portion 134. The lower bolt 130D penetrates the lower side of the seventh insertion portion 137. The washer 143 is interposed between the head of the bolt 130 and the left pressure plate 126L. The first elastic member 145, the second elastic member 146, and the third elastic member 147 are annular, and made of anti-vibration rubber or the like. The first elastic member 145, the second elastic member 146, and the third elastic member 147 are interposed between the right pressing plate 126R and the plate 142 in a stacked manner. The outer diameter of the second elastic body 146 is smaller than the outer diameters of the first elastic material 145 and the third elastic material 147.

The first elastic member 145 and the third elastic member 147 are disposed so as to sandwich the front extension plate 53F of the partition plate 53. The second elastic body 146 is fitted into a hole provided in the front extension plate 53F. Thereby, the second clamp tool 122 is fixed to the front extension plate 53F.
The plate 142 is a rectangular metal plate and is interposed between the nut 141 and the third washer 147. The plate 142 has a through hole through which the upper bolt 130U passes at the top, and a through hole through which the lower bolt 130D passes at the bottom. The nut 141 is screwed to the tip of the upper bolt 130U and the tip of the lower bolt 130D. By tightening the nut 141, the right holding member 125R and the left holding member 125L are tightened in a close direction. Thereby, the right holding member 125R and the left holding member 125L are elastically deformed, and the second pilot hose 50 and the like inserted in the fourth insertion portion 134 and the like are tightened and held.

The second support portion 124 non-rotatably supports the second holding portion 123. The second support portion 124 has a bracket 128 and a seal member 129.
The bracket 128 is formed by bending a metal plate, and is fixed to the rear extension portion 126b of the left pressing plate 126L. The bracket 128 has a vertical plate 128a and a horizontal plate 128b. The vertical plate 128a is a plate disposed vertically to the pivoting substrate 8, and is fixed to the rear end of the rear extension portion 126b. The vertical plate 128a has a vertical portion 128c extending from the rear upper portion to the rear lower portion of the left holding member 125L, an upper portion 128d extending to the right from the upper end of the vertical portion 128c, and a lower portion extending to the left from the lower end Not shown). The vertical portion 128 c is positioned to the left of the fourth insertion portion 134 and the like, the upper portion 128 d is positioned above the fourth insertion portion 134, and the lower portion is positioned below the seventh insertion portion 137. Thus, the interference between the vertical plate 128a and the third hydraulic hose 103 or the like is avoided. The horizontal plate 128b extends forward from the lower end of the upper portion 128d of the vertical plate 128a. The front end of the horizontal plate 128b is in contact with the upper portion of the rear surface of the right holding member 125R and the left holding member 125L, and the left end is fixed to the right surface of the left pressing plate 126L.

  The sealing material 129 is formed of an elastic material such as rubber, and is attached to the outer edge of the vertical plate 128a. Specifically, they are attached along the upper edge of the upper portion 128d, the lower edge of the lower portion, and the left edge of the vertical portion 128c. In the seal member 129, when the second clamp member 122 is attached to the front extension plate 53F of the partition plate 53, air flows from the engine room ER to the front of the partition plate 53 through the periphery of the second clamp member 122. Stop that.

  The rear edge portion (the rear end portion of the rear extension portion 126 b) of the left pressing plate 126 </ b> L is perpendicular to the turning base 8. Therefore, the first insertion portion 131 and the like are inclined so that the rear is high and the front is low. As a result, the second pilot hose 50 and the like inserted into the fourth insertion portion 134 and the like are disposed so as to incline downward from the rear to the front. As a result, it is possible to easily route the second pilot hose 50 or the like with gentle bending from the hydraulic pump 11 positioned rearwardly and above the second clamp tool 122 to the fourth insertion portion 134 or the like. .

As described above, in the present embodiment, the third hydraulic hose 103 or the like connecting the hydraulic pump 11 and the control valve 20 is a plurality of clamps (first clamps) in the middle of the hydraulic pump 11 and the control valve 20. It is supported by the tool 112 and the second clamp tool 122).
Here, in the work machine 1 of the present embodiment, the hydraulic pump 11 is provided at the rear on the swing base 8, and the control valve 20 is provided at the front on the swing base 8. The third hydraulic hose 103 or the like connecting the control valve 20 becomes long. Therefore, it is difficult to fix the path of the third hydraulic hose 103 and the like with one clamp tool, and the pulsation of the hose is easily generated, and the driver's ear noise becomes large. However, in the present embodiment, since the third hydraulic hose 103 and the like are supported by the plurality of clamps (the first clamp 112 and the second clamp 122), the third hydraulic hose 103 and the like can be fixed. , Such a problem does not occur.

In the present embodiment, the middle part of the third hydraulic hose 103 and the like is supported by two clamps, but may be supported by three or more clamps. Moreover, in this embodiment, although one clamp tool which has a holding | maintenance part which can be rotated to a periphery of a vertical axis is used, you may use two or more.
While the present invention has been described above, it should be understood that the embodiments disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by the claims, and is intended to include all the modifications within the meaning and scope equivalent to the claims.

1 Work machine 8 board (swing board)
10 Engine 12 Cooling fan (fan)
13 Shroud 14 Radiator (Cooling System)
14a Heat dissipation surface 15 Oil cooler (cooling device)
15a Heat dissipation surface 24 Bracket 24a Axis 32 Right cover (cover)
63 Perforated plate 71 first edge (intake)
72 second edge (opening)
90 louver ER engine room IR intake room

Claims (4)

A substrate,
An engine provided on the substrate;
An engine room in which the engine is disposed;
An intake chamber formed on one side in the width direction of the substrate than the engine room;
A cooling device disposed in the intake chamber;
A cover that covers the side of the one side of the intake chamber;
The cover includes an air inlet at a position facing the heat dissipation surface of the cooling device.
A louver provided at the intake port and inclined downward toward the inside of the intake chamber is provided,
The work implement, wherein an upper edge of the air inlet is located above an upper end of the heat dissipation surface, and a lower edge of the air inlet is located above a lower end of the heat dissipation surface. The cooling device includes a radiator for cooling a coolant of the engine, and an oil cooler for cooling a hydraulic oil.
The radiator and the oil cooler are disposed in this order from the engine compartment side toward the intake port side, and the lower end of the heat dissipation surface of the radiator is positioned below the lower end of the heat dissipation surface of the oil cooler The working machine according to claim 1. An opening is formed below the engine in the engine room,
The work machine according to claim 1, wherein the opening is covered with a perforated plate. A fan for generating a flow of air from the intake chamber side to the engine room side;
And a shroud surrounding the fan.
The oil cooler is tiltable with an axis provided on a bracket fixed to the shroud as a fulcrum,
The work machine according to claim 2 or 3, wherein the shaft is located below the lower end of the heat dissipation surface of the oil cooler and above the lower end of the heat dissipation surface of the radiator.

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