JP2019173455A - Shovel - Google Patents

Abstract

A shovel with improved maintenance efficiency is provided. A shovel includes an upper swing body, a pump chamber provided inside the upper swing body, and a firewall disposed above the pump chamber. It is removable from the side of the body 2. Thus, the firewall 35 can be easily removed simply by opening the side cover 18A of the upper swing body 2 without opening the engine hood 200 or removing the ceiling cover 18B. [Selection diagram] FIG.

Description

  The present disclosure relates to excavators.

  In a shovel equipped with a diesel engine, an exhaust gas treatment device (such as an SCR) tends to increase in size and weight in order to meet the recent high-order exhaust gas regulations. For this reason, a configuration has been proposed in which the exhaust gas treatment device is supported by the house frame of the upper-part turning body in the vicinity of the engine without being supported by the engine (for example, Patent Document 1).

  In this configuration, the pump chamber is often arranged immediately below the exhaust gas treatment device. In this configuration, a firewall is generally provided between the exhaust gas treatment device and the pump chamber to prevent oil or the like leaking from the pump chamber from flying to the exhaust gas treatment device side.

Japanese Patent Laid-Open No. 2006-145472

  Since the pump chamber is arranged around the side edge of the upper swing body, when the pump chamber is maintained, the side cover is often opened and the work is performed from the side of the upper swing body. However, when inspecting parts on the back side of the pump chamber, an operator needs to access the back side of the pump chamber to work. In this case, if the work space is narrow, the maintainability is poor, so it is necessary to secure the work space by removing the firewall. In order to remove the firewall, it was necessary to open the engine hood from the upper side of the upper revolving structure, and then remove the ceiling cover of the house frame, resulting in complicated work procedures, poor work efficiency, and poor maintainability.

  An object of this indication is to provide the shovel which aimed at the efficiency of a maintenance.

  An excavator according to an aspect of an embodiment of the present invention includes an upper swing body, a pump chamber provided inside the upper swing body, and a firewall disposed above the pump chamber, the firewall Is detachable from the side surface of the upper swing body.

  According to the present disclosure, it is possible to provide an excavator that improves maintenance efficiency.

It is a left view of the shovel which concerns on one Embodiment of this invention. It is a right view of the shovel shown in FIG. It is a top view which shows schematic structure of an upper revolving body. It is a top view which shows schematic structure of an upper revolving body. It is a figure which shows the structural example of an waste gas processing apparatus. It is a side view which shows schematic structure inside an engine room. It is a perspective view of a house frame. It is a figure which shows an example of the position adjustment method of the mounting base by an adjustment bolt.

  Hereinafter, embodiments will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  In the following description, the X direction, the Y direction, and the Z direction are directions perpendicular to each other. Typically, the X direction and the Y direction are horizontal directions, and the Z direction is a vertical direction. The X direction is the front-rear direction of the shovel, the front side is the X positive direction, and the rear side is the X negative direction. The Y direction is the left-right width direction of the shovel, the right side is the Y positive direction, and the left side is the Y negative direction. The Z direction is the height direction of the shovel, the upper side is the Z positive direction, and the lower side is the Z negative direction.

  FIG. 1 is a left side view of an excavator according to an embodiment of the present invention. FIG. 2 is a right side view of the excavator shown in FIG.

  As shown in FIGS. 1 and 2, the excavator includes a lower traveling body 1, an upper swing body 2, a cab 3, a boom 4, an arm 5, and a bucket 6. The upper swing body 2 is mounted on the lower traveling body 1 via a swing mechanism (not shown). A cab 3 is provided on the left front portion of the upper swing body 2. One end of the boom 4 is rotatably attached to the front center of the upper swing body 2. The arm 5 is pivotally attached to the tip of the boom 4. The bucket 6 that is an end attachment is rotatably attached to the tip of the arm 5. Instead of the bucket 6 that is a drilling attachment, an end attachment such as a breaker or a crusher may be attached to the tip of the arm 5.

  As will be described later, a diesel engine and components associated with the engine are mounted on the rear part of the upper swing body 2, and an engine hood 200 is attached to cover the engine and the upper part of the components.

  3A and 3B are plan views showing a schematic configuration of the upper swing body 2. As shown in FIGS. 3A and 3B, an engine room 7 (shown by a one-dot chain line) is formed at the rear portion of the upper swing body 2. The upper portion of the engine room 7 is covered with an engine hood 200 as shown in FIGS. 1 and 2, but the engine hood 200 is removed in FIGS. 3A and 3B to illustrate the interior of the engine room 7. It is shown. FIG. 3B shows a state where the exhaust gas treatment device 10 in the engine room 7 is removed and the pump chamber 40 disposed immediately below the exhaust gas treatment device 10 can be seen.

  As shown in FIG. 3A, a diesel engine 8 is installed in the engine room 7. In the vicinity of the diesel engine 8, an SCR system (selective catalyst reduction system) 110 including an exhaust gas treatment device 10 described later is disposed. The diesel engine 8 is provided with a cooling fan 12, and a heat exchange device 13 including a radiator is installed in front of the cooling fan 12.

  An air cleaner 63 (air filter) is disposed on the side of the heat exchange device 13 (front side as an excavator). The air cleaner 63 is connected to the diesel engine 8 via the intake pipe 64. The air filtered by the air cleaner 63 is supplied to the diesel engine 8 through the intake pipe 64.

  An exhaust pipe 9 for discharging engine exhaust (hereinafter referred to as “exhaust gas”) is connected to the diesel engine 8. At the downstream end of the exhaust pipe 9, an exhaust gas treatment device 10 corresponding to higher-order exhaust gas regulations is installed. In the present embodiment, as the exhaust gas treatment device 10, a urea selective reduction type NOx treatment device using an aqueous urea solution (liquid reducing agent) is used. The exhaust gas treatment device 10 will be described later.

  The cab 3 is disposed on the left front portion of the upper swing body 2. Here, in this embodiment, the front part of the upper swing body 2 is a portion on the side where the boom 4 is attached as viewed from the center of the upper swing body. Moreover, the front is a direction in which the boom 4 extends as viewed from the center of the upper swing body. Further, the left side is a portion which becomes the left when facing the front (the direction in which the boom 4 extends) in the upper swing body 2. Further, the right side is a portion that becomes the right when facing the front (the direction in which the boom 4 extends) in the upper swing body 2.

  A hydraulic oil tank 120 that stores hydraulic oil used in the hydraulic system is disposed on the front right side of the engine room 7. A fuel tank 19 that stores diesel engine fuel such as light oil is disposed in front of the hydraulic oil tank 120. The diesel engine fuel stored in the fuel tank 19 is supplied to the engine 8 through the fuel supply pipe 41.

  A urea water tank 20 that stores a treatment agent (urea aqueous solution (liquid reducing agent)) used by the exhaust gas treatment device 10 is disposed in front of the fuel tank 19. The treatment agent stored in the urea water tank 20 is supplied to the exhaust gas treatment device 10 through a urea water supply line 69 (see FIG. 4). Note that the urea aqueous solution (liquid reducing agent) is an example of a processing agent, and other processing agents may be used as the liquid reducing agent, or other processing methods may be used.

  As shown in FIGS. 3A and 3B, the boom 4 is rotatably supported by a boom support bracket 17 that is firmly fixed to the front center portion of the swing frame 21 of the upper swing body 2. More specifically, the boom 4 is provided between the right bracket 17R and the left bracket 17L of the boom support bracket 17, and is provided through the right bracket 17R, the boom 4, and the left bracket 17L. Supported by pins 100.

  As shown in FIG. 3B, various components of the fuel supply system for supplying fuel to the engine 8 are arranged in the pump chamber 40 formed in the engine room 7. Specifically, the pre-filter 43, the fuel pump 44, the main filter 45, the three-way valve 46, and piping connecting them are arranged in the pump chamber 40. More specifically, a fuel supply pipe 41 for supplying fuel from the fuel tank 19 to the engine 8 extends into the pump chamber 40, and in the middle of the fuel supply pipe 41, a prefilter 43, a fuel pump 44, a main A filter 45, a three-way valve 46, and the like are provided. On the other hand, the three-way valve 46 is connected to the fuel tank 19 via a return drain pipe 47, and the fuel can be returned to the fuel tank 19 by switching the three-way valve 46.

  A hydraulic pump 24 is disposed in the pump chamber 40. The hydraulic pump 24 is connected to the hydraulic oil tank 120 by a hydraulic oil supply pipe 25 and a hydraulic oil return drain pipe 26. The hydraulic pump 24 supplies the hydraulic oil supplied from the hydraulic oil supply pipe 25 to the control valve 27 that controls each hydraulic element of the hydraulic system in the excavator via the hydraulic oil lines P1 and P2. Further, the hydraulic pump 24 can return the hydraulic oil to the hydraulic oil tank 120 via the hydraulic oil return drain pipe 26.

  Next, the above-described exhaust gas treatment apparatus 10 will be described in detail with reference to FIG. FIG. 4 is a diagram illustrating a configuration example of the exhaust gas treatment apparatus 10. In the present embodiment, the exhaust gas treatment device 10 purifies the exhaust gas discharged from the diesel engine 8. The diesel engine 8 is controlled by an engine control module 60 (hereinafter referred to as “ECM”).

  Exhaust gas discharged from the diesel engine 8 flows to the exhaust pipe 9 through the turbocharger 61. Then, the exhaust gas flows into the exhaust gas treatment device 10 from the exhaust pipe 9. The exhaust gas is purified in the exhaust gas treatment device 10 and then released to the atmosphere.

  On the other hand, the intake air introduced into the intake pipe 64 through the air cleaner 63 passes through the intercooler 65 included in the turbocharger 61 and the heat exchanger 13 and is supplied to the diesel engine 8.

  The exhaust pipe 9 includes a diesel particulate filter 66 (DPF) that collects particulate matter in the exhaust gas as a first exhaust treatment unit, and a selective reduction that reduces and removes NOx in the exhaust gas as a second exhaust treatment unit. A catalyst 67 (SCR) is provided in series. The diesel particulate filter 66 and the selective reduction catalyst 67 are connected by an exhaust pipe 9-1. In addition to the diesel particulate filter 66 described above, a diesel oxidation catalyst (DOC: Diesel Oxidation Catalyst) may be provided as the first exhaust treatment unit.

  The selective reduction catalyst 67 removes NOx by receiving the supply of the liquid reducing agent and continuously reducing NOx in the exhaust gas. In the present embodiment, urea water (urea aqueous solution) is used as the liquid reducing agent from the viewpoint of ease of handling. However, the treatment agent is not limited to urea water (urea aqueous solution) as long as the treatment agent can continuously reduce NOx, and other treatment agents may be used.

  A urea water injection valve 68 for supplying urea water to the selective reduction catalyst 67 is provided upstream of the selective reduction catalyst 67 in the exhaust pipe 9. The urea water injection valve 68 is connected to a urea water tank (treatment agent tank) 20 via a urea water supply line 69.

  A urea water supply pump 70 is provided in the urea water supply line 69. A filter 71 is provided between the urea water tank 20 and the urea water supply pump 70. The urea water stored in the urea water tank 20 is supplied to the urea water injection valve 68 by the urea water supply pump 70. The urea water is injected into the exhaust pipe 9 from the urea water injection valve 68 at a position upstream of the selective reduction catalyst 67 in the exhaust pipe 9.

  The urea water injected from the urea water injection valve 68 is supplied to the selective reduction catalyst 67. The supplied urea water is hydrolyzed in the selective reduction catalyst 67 to generate ammonia. The produced ammonia reduces NOx contained in the exhaust gas in the selective reduction catalyst 67. Thereby, the exhaust gas discharged from the diesel engine 8 is purified.

  The first NOx sensor 72 is disposed on the upstream side of the urea water injection valve 68. The second NOx sensor 73 is disposed on the downstream side of the selective reduction catalyst 67. The first and second NOx sensors 72 and 73 detect the concentration of NOx contained in the exhaust gas at the respective arrangement positions.

  A urea water remaining amount sensor 74 is disposed in the urea water tank 20. The urea water remaining amount sensor 74 detects the remaining amount of urea water in the urea water tank 20.

  The first and second NOx sensors 72 and 73, the urea water remaining amount sensor 74, the urea water injection valve 68, and the urea water supply pump 70 are connected to the exhaust gas controller 75. The exhaust gas controller 75 controls the injection amount so that an appropriate amount of urea water is injected by the urea water injection valve 68 and the urea water supply pump 70 based on the NOx concentrations detected by the first and second NOx sensors 72 and 73. I do.

  The exhaust gas controller 75 calculates the ratio of the remaining amount of urea water to the entire volume of the urea water tank 20 based on the remaining amount of urea water output from the urea water remaining amount sensor 74. In the present embodiment, the ratio of the remaining amount of urea water to the total volume of the urea water tank 20 is defined as the urea water remaining amount ratio. For example, the urea water remaining ratio of 50% indicates that the urea water half of the capacity of the urea water tank 20 remains in the urea water tank 20.

  The exhaust gas controller 75 is connected to an ECM 60 that controls the diesel engine 8 by communication means. The ECM 60 is connected to the excavator controller 76 by communication means.

  Various types of information of the exhaust gas treatment device 10 that the exhaust gas controller 75 has can be shared by the excavator controller 76. Each of the ECM 60, the exhaust gas controller 75, and the excavator controller 76 includes a CPU, a RAM, a ROM, an input / output port, a storage device, and the like.

  A monitor 77 (display device) is connected to the shovel controller 76. The monitor 77 displays information and data such as warnings and operating condition displays.

  FIG. 5 is a side view showing a schematic configuration inside the engine room 7. FIG. 5 transparently shows the engine room 7 when viewed from the rear side (X negative direction side) of the upper swing body 2.

  In the engine room 7, an engine 8, a heat exchange device 13, an exhaust gas treatment device 10, a house frame 31, and the like are disposed.

The engine 8 is supported on an upper part of an engine mounting seat 22 disposed on the revolving frame 21 via a mount 23. The mount 23 is an anti-vibration mount and prevents vibration generated in the engine 8 from being transmitted to the turning frame 21.

  A cooling fan 12 is disposed on the Y negative direction side (left side in the figure) of the engine 8. A heat exchange device 13 is disposed on the Y negative direction side of the cooling fan 12.

  The cooling fan 12 is rotationally driven by the engine 8. As the cooling fan 12 is driven to rotate, outside air is taken into the engine room 7 as cooling air. The heat exchange device 13 performs a heat exchange process with the cooling air taken into the engine room 7.

  The heat exchanging device 13 is an oil cooler for radiating hydraulic oil from a hydraulic device such as a radiator, boom cylinder, arm cylinder, bucket cylinder or the like that cools cooling water flowing in the engine 8 and supercharged air supplied to the engine. A radiator unit 13A provided with an intercooler for cooling the fuel, a fuel cooler 13B for cooling excess fuel returning to the fuel tank 19, and a condenser 13C for an air conditioner.

  A hydraulic pump 24 is integrally attached to the Y-direction side of the engine 8. The hydraulic pump 24 is a hydraulic source such as a boom cylinder, an arm cylinder, or a bucket cylinder that drives the work attachment. This hydraulic pump 24 is also driven by the engine 8.

  Since the exhaust gas treatment device 10 purifies the exhaust gas exhausted from the engine 8 as described above, it is disposed in the vicinity of the engine 8. Further, since the heat exchanging device 13 is disposed on the upstream side of the engine 8 with respect to the flow direction of the cooling air, the exhaust gas treatment device 10 is located downstream of the engine 8 with respect to the flow direction of the cooling air (Y positive direction side). ).

  In recent years, higher-order exhaust gas regulations have been demanded, and the DPF 66 and SCR 67 constituting the exhaust gas treatment device 10 have become larger and heavier in order to comply with these higher-order exhaust gas regulations. For this reason, it is difficult to attach the exhaust gas treatment device 10 to the engine 8 as in the prior art. Therefore, in this embodiment, the exhaust gas treatment device 10 is attached to the house frame 31 and supported by the house frame 31.

  Further, when the DPF 66 and the SCR 67 constituting the exhaust gas treatment device 10 are arranged in a line, the length becomes longer than the engine width, and the engine room 7 cannot be made compact. For this reason, in this embodiment, the DPF 66 and the SCR 67 are separated, and the DPF 66 and the SCR 67 are arranged in parallel so as to be substantially parallel.

  The engine room 7 has a lower portion covered with the revolving frame 21, a side surface and part of the upper surface covered with the exterior cover 18, and an upper surface opening covered with the engine hood 200. The exterior cover 18 includes a side cover 18A that covers the side surface of the upper swing body 2 and a ceiling cover 18B that covers the upper surface.

  Details of the house frame 31 will be described with reference to FIG. 6 in addition to FIG. FIG. 6 is a perspective view of the house frame 31.

  The house frame 31 has a function of supporting the exhaust gas treatment device 10 as described above. The house frame 31 is provided on the turning frame 21. Further, the position of the house frame 31 is set on the downstream side (Y positive direction side) of the engine 8 with respect to the flow direction of the cooling air. The house frame 31 of the present embodiment means a structure that is installed on the revolving frame 21, supports the exhaust gas treatment device 10, and has a pump chamber 40 inside.

  The house frame 31 has a pair of outer column members 32 (column members), a pair of inner column members 33, and a pair of beam members 34. The pair of outer column members 32 are arranged in parallel along the X direction at a position on the Y positive direction side of the house frame 31. The pair of inner column members 33 are arranged in parallel along the X direction at a position on the Y negative direction side of the house frame 31. The pair of outer column members 32 and the pair of inner column members 33 are arranged on the outer side and the inner side, respectively, with respect to the side cover 18A of the upper swing body 2, and are arranged to face each other in the Y direction. The pair of outer column members 32 and the pair of inner column members 33 have lower ends attached to the turning frame 21 and extend in the vertical direction (Z direction). The side cover 18 </ b> A is rotatably attached to the outer column member 32 on the rear side (X negative direction side) of the upper swing body 2 among the pair of outer column members 32. The house frame 31 is formed in a substantially rectangular parallelepiped shape, and the pair of outer column members 32 and the pair of inner column members 33 form four sides in the vertical direction of the rectangular parallelepiped shape. Here, in this embodiment, the house frame 31 is disposed such that the pair of outer column members 32 faces the right side surface of the upper swing body 2.

  The pair of beam members 34 connects the pair of outer column members 32 and the pair of inner column members 33. The pair of beam members 34 are horizontally installed so as to extend along the Y direction. The pair of inner column members 33 is shorter than the pair of outer column members 32, and the pair of beam members 34 has an upper end portion of the pair of inner column members 33 and a substantially intermediate position in the vertical direction of the pair of outer column members 32. It is connected.

  On the pair of beam members 34, a mounting table 36 for placing the exhaust gas treatment device 10 in the X direction is placed. The mounting base 36 includes a lower member 36A, an upper member 36B, and a reinforcing member 36C. The lower member 36 </ b> A is placed and fixed on the pair of beam members 34. Thereby, the mounting base 36 is fixed to the house frame 31. The upper member 36B is erected upward with respect to the lower member 36A. The reinforcing member 36C reinforces the mounting table 36 by connecting the upper member 36B and the lower member 36A. The DPF 66 and the SCR 67 of the exhaust gas treatment device 10 are attached to the upper member 36B of the mounting base 36.

  Thus, the exhaust gas treatment device 10 is separated from the engine 8 by attaching the exhaust gas treatment device 10 to the house frame 31. The exhaust gas treatment device 10 is configured to be mounted on the turning frame 21 via the house frame 31.

  The mounting base 36 is disposed above the pair of beam members 34. That is, the exhaust gas treatment device 10 is installed in the upper part of the house frame 31. On the other hand, the pump chamber 40 described with reference to FIG. 3B is provided in the lower portion of the house frame 31 around the house frame 31, and is connected to the hydraulic pump 24. And various components of the fuel supply system are arranged. Therefore, the house frame 31 is provided with a firewall 35 for shielding the lower hydraulic system and fuel supply system components and the upper exhaust gas treatment device 10.

  The firewall 35 is a plate-like member and is disposed substantially horizontally above the pump chamber 40. The firewall 35 is a rectangular plate member, and a pair of opposite sides are respectively attached to the pair of beam members 34. Here, the beam member 34 has advanced inside the opposing direction of the pair of outer column members 32, and the firewall 35 is attached to the beam member 34 by bolt fastening or the like. That is, the width A in the X direction of the firewall 35 is smaller than the distance B between the pair of outer column members 32. With this configuration, the firewall 35 can be attached / detached from between the pair of outer column members 32. As a result, the firewall 35 can be attached / detached from the side surface (side cover 18A side) of the upper swing body 2.

  Conventionally, since the pump chamber 40 is disposed around the side edge of the upper swing body 2, when the pump chamber 40 is serviced, the side cover 18 </ b> A is opened and work is performed from the side of the upper swing body 2. There are many. However, it is necessary for an operator to access and work on the back side in the pump chamber 40, for example, to inspect parts on the back side of the pump chamber 40. Here, on the back side of the pump chamber 40 near the hydraulic pump 24, hydraulic oil pipes (hydraulic oil lines P1, P2, hydraulic oil supply pipe 25, hydraulic oil return drain pipe 26) and fuel pipe (fuel supply pipe 41, Since the return drain pipe 47) and the like are densely packed (see FIG. 3B), the work space for the worker is narrow. In this case, if the work space is narrow, the maintainability is poor. Therefore, it is necessary to secure the work space by removing the firewall 35 above the pump chamber 40. Conventionally, since the firewall 35 could not be taken out from the side, in order to remove the firewall 35, first, the engine hood 200 is opened from the upper side of the upper swing body 2, and then the ceiling cover 18B above the house frame 31 is removed. It was necessary, the work procedure was complicated, the work efficiency was poor, and the maintainability was also bad.

  Further, when performing maintenance in the vicinity of the exhaust gas treatment device 10 such as the first and second NOx sensors 72 and 73, the firewall 35 becomes an obstacle, so the engine hood 200 is opened from the upper side of the upper swing body 2. It was necessary to remove the ceiling cover 18B above the house frame 31, the work procedure was complicated, work efficiency was poor, and maintainability was also bad.

  On the other hand, in this embodiment, since the firewall 35 is detachable from the side surface (side cover 18A side) of the upper swing body 2, the engine hood 200 is simply opened by opening the side cover 18A of the upper swing body 2. The firewall 35 can be easily removed without opening the door or removing the ceiling cover 18B. As a result, even when the worker accesses the inner side of the pump chamber 40 to perform work or performs maintenance of the exhaust gas treatment apparatus 10, the worker only needs to open the side cover 18A and remove the firewall 35. However, it becomes possible to access the back side of the pump chamber 40 from the side of the upper swing body 2, so that work efficiency can be improved and maintainability can be improved. Thereby, the efficiency of excavator maintenance can be improved.

  The above-mentioned “side surface of the upper swing body 2” is more specifically a side surface on the right rear side of the upper swing body 2 provided with an attachment toward the front. In addition, when the pump chamber 40 is disposed not in the right rear side of the upper swing body 2 but in another part of the upper swing body 2 as in the present embodiment, the upper portion disposed facing the pump chamber 40. The side cover 18A of the revolving structure 2 is “the side surface of the upper revolving structure 2”.

  The firewall 35 includes an outer bent portion 35A having a bent structure at a side located on the outer side (Y positive direction side) of the upper swing body 2 and the inner side (Y negative direction) of the upper swing body 2. And an inner bent portion 35B having a bent structure on the side located on the side).

  In the conventional firewall, it was easy to bend in the front-rear direction (X direction) of the upper swing body 2 due to the influence of the impact transmitted during excavation work of the excavator, for example. On the other hand, in the present embodiment, since bending structures are provided along the X direction at both ends in the Y direction of the firewall 35, the rigidity in the X direction (the longitudinal direction of the upper swing body 2) with respect to the bending load applied to the firewall 35. And the strength of the firewall 35 can be improved.

  A ceiling cover 18 </ b> B that is a part of the exterior cover 18 of the upper swing body 2 is installed at the upper ends of the pair of outer column members 32.

  Further, the house frame 31 includes an adjustment member for adjusting the position of the mounting base 36. The adjustment member is an adjustment bolt 39 that can move the mounting table 36 along the extending direction of the beam member 34 by pressing the mounting table 36.

  FIG. 7 is a diagram illustrating an example of a method for adjusting the position of the mounting table 36 using the adjustment bolt 39. As shown in FIG. 7, the beam member 34 and the ceiling cover 18 </ b> B are connected by a connection member 37 via a base portion 38 that is erected on the beam member 34. The connecting member 37 is a frame having an L-shaped cross section extending in the Z direction, and reinforces the connection between the ceiling cover 18 </ b> B and the house frame 31.

  The base portion 38 is a plate-like member having a main surface in the Y direction, and a screwing hole 38A into which the adjustment bolt 39 can be screwed along the extending direction (Y direction) of the beam member 34 is formed. Further, the Y positive direction side end portion of the lower member 36A of the mounting base 36 is bent, and a bent portion 36D bent vertically upward is provided. The firewall 35 is connected to the bent portion 36D of the mounting table 36 by the inner bent portion 35B. The main surface of the bent portion 36D and the main surface of the base portion 38 are disposed to face each other.

  The tip of the shaft portion of the adjustment bolt 39 screwed into the screw hole 38A of the base portion 38 is formed with a length that can contact the main surface of the bent portion 36D of the mounting base 36. Then, the adjustment bolt 39 is rotated to advance the tip of the shaft portion toward the mounting base 36, whereby the bent portion 36 </ b> D of the mounting base 36 is pressed in the Y negative direction side by the adjustment bolt 39, thereby Can move in the negative direction. Note that when the position of the mounting table 36 is adjusted, the firewall 35 connected to the mounting table 36 may also be moved in the Y direction in conjunction with the mounting table 36.

  Even when the same type of engine 8 is loaded on the excavator, there may be a case where it is desired to finely adjust the position of the exhaust gas treatment device 10 with respect to the engine 8 because of an assembly error. In the present embodiment, since the position of the mounting base 36 of the exhaust gas treatment device 10 can be adjusted using the adjustment bolt 39 even after the engine 8 and the house frame 31 are installed on the revolving frame 21, the efficiency of assembly work can be improved. .

  The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Those in which those skilled in the art appropriately modify the design of these specific examples are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the specific examples described above and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. Each element included in each of the specific examples described above can be appropriately combined as long as no technical contradiction occurs.

2 Upper swing body 18B Ceiling cover 31 House frame 32 Outer column member (column member)
33 Inner column member 34 Beam member 35 Firewall 35A Outer bent portion 35B Inner bent portion 36 Mounting base 39 Adjustment bolt (adjustment member)
40 Pump room

Claims (8)

An upper swing body,
A pump chamber provided inside the upper rotating body;
A firewall disposed above the pump chamber;
With
The firewall is removable from the side of the upper swing body,
Excavator. A house frame disposed around the pump chamber;
The firewall is attached to the house frame;
The house frame has a pair of pillar members,
The width of the firewall is smaller than the distance between the pair of pillar members,
The excavator according to claim 1. The house frame is
A pair of inner column members disposed opposite to the pair of column members inside the upper swing body from the pair of column members;
A pair of beam members connecting between the pair of column members and the pair of inner column members;
The firewall is attached to the beam member,
The shovel according to claim 2. The firewall has a bent structure at a side located outside in the side surface direction of the upper swing body,
The excavator according to any one of claims 1 to 3. The firewall has a bent structure at a side located inside the side surface direction of the upper swing body,
The excavator according to any one of claims 1 to 4. A ceiling cover that is a part of an exterior cover of the upper revolving unit is installed at the upper ends of the pair of column members,
The excavator according to claim 2 or 3. Mounted on the house frame and for mounting an exhaust gas treatment device,
An adjustment member for adjusting the position of the mounting table,
The excavator according to claim 3. The mounting table is placed on the beam member;
The adjustment member is an adjustment bolt capable of moving the mounting base along the extending direction of the beam member by pressing the mounting base.
The excavator according to claim 7.

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