Construction machine

Abstract

A construction machine (100) is provided with: a fuel cell device (42) having a device drain port (43); and a drain pipe (30) connected to the device drain port (43). The drain pipe (30) is disposed at a position lower than or equal to the height of the device drain port (43).

Description

Technical Field

[0001] This disclosure relates to engineering machinery such as a hydraulic excavator. Background Technology

[0002] The engineering machinery described in Patent Document 1 includes: a main body capable of rotation via a rotating part; a working device connected to one end of the main body; a hydrogen tank disposed inside the other end of the main body for storing hydrogen; and a fuel cell disposed inside the main body, to which the hydrogen from the hydrogen tank is supplied. This fuel cell is capable of generating electricity through a chemical reaction between hydrogen and oxygen.

[0003] For construction machinery that uses an engine as its power source, the high-temperature exhaust gas from the engine is usually discharged from the upper part of the machine body, such as the upper rotating body. However, when construction machinery that uses a fuel cell device as its power source adopts such a discharge structure, the following problem occurs. Specifically, water (water vapor) is produced through a chemical reaction in the fuel cell device, thus requiring the water discharged from the fuel cell device to be discharged to the outside of the construction machinery. However, when a drain pipe for discharging this water to the outside of the construction machinery is arranged upwards from the fuel cell device toward the upper part of the machine body, water easily becomes trapped inside the drain pipe.

[0004] Existing technical documents Patent documents Patent Document 1: International Patent Publication No. 2022 / 137688. Summary of the Invention

[0005] The purpose of this disclosure is to provide an engineering machine that prevents water from easily remaining in a drain pipe used to discharge water from a fuel cell device to the outside of the engineering machine.

[0006] The engineering machinery involved in the first scheme includes: a fuel cell device having a device drain outlet; and a drain pipe connected to the device drain outlet, wherein the drain pipe is configured at a position lower than or equal to the height of the device drain outlet. Attached Figure Description

[0007] Figure 1 This is a side view showing the engineering machinery involved in the implementation.

[0008] Figure 2 It is along Figure 1 The cross-sectional view along line II-II shows the interior of the machine room of the engineering machinery.

[0009] Figure 3 This is a perspective view showing the body frame and fuel cell device.

[0010] Figure 4 It is magnification Figure 3 A three-dimensional view of the part enclosed by a dotted line.

[0011] Figure 5 Looking from the direction indicated by arrow V Figure 4 The right view of the portion shown in the image.

[0012] Figure 6 This is a perspective view of a drainage receiver provided by an engineering machine according to a variation of the above embodiment 1.

[0013] Figure 7 This is a cross-sectional view showing the drainage receiver of modified example 1.

[0014] Figure 8 This is a perspective view showing the state of the drainage receiver supported on the frame of the machine in the modified example 1, which is a view of the rear of the upper rotating body from a lower oblique angle.

[0015] Figure 9 This is a side view showing the state in which the drainage receiver is supported on the frame of the machine in the modified example 1.

[0016] Figure 10 This is a rear view showing the state in which the drainage receiver is supported on the frame of the engineering machinery involved in Variation 1.

[0017] Figure 11 This is a perspective view of the drainage receiver provided by the engineering machinery involved in the modified example 2 of the above embodiment.

[0018] Figure 12 This is a perspective view of the drain receiver involved in Modification 2, showing the state after the upper wall of the drain receiver has been removed.

[0019] Figure 13 This is a perspective view showing the state of the drainage receiver supported on the frame of the machine in the modified example 2, which is a view of the rear of the upper rotating body from a slightly lower angle.

[0020] Figure 14 This is a side view showing the state in which the drainage receiver is supported on the frame of the machine in the modified example 2.

[0021] Figure 15 This is a rear view showing the state in which the drainage receiver is supported on the frame of the engineering machinery involved in Variation 2.

[0022] Figure 16 This is a perspective view of a drainage receiver provided by an engineering machine according to a variation of the above embodiment, Example 3.

[0023] Figure 17 This is a perspective view of the drain receiver involved in Modification 3, showing the state after the upper wall of the drain receiver has been removed.

[0024] Figure 18 This is a perspective view showing the state of the drainage receiver supported on the frame of the machine in the modified example 3, which is a view of the rear of the upper rotating body from a lower oblique angle.

[0025] Figure 19 This is a side view showing the state in which the drainage receiver is supported on the frame of the machine in the modified example 3.

[0026] Figure 20 This is a rear view showing the state in which the drainage receiver is supported on the frame of the engineering machinery involved in Variation 3.

[0027] Figure 21 This is a perspective view of the drainage pipe involved in variation example 3.

[0028] Figure 22 This is a perspective view showing the state in which the drainage receiver and pipe are supported on the frame of the engineering machinery involved in the modified example 4 of the embodiment. It is a view of the rear of the upper rotating body from a slightly lower angle.

[0029] Figure 23 This is a side view showing the state in which the drainage receiver is supported on the frame of the machine in the engineering machinery involved in the variation 5 of the embodiment.

[0030] Figure 24 This is a side view showing the state in which the drainage receiver is disposed in the machine room of the engineering machinery according to the modified example 6 of the embodiment.

[0031] Figure 25 This is a side view showing the main parts of an engineering machine involved in another variation of the described embodiment.

[0032] Figure 26 It is shown Figure 25 A perspective view of the lower traveling body and rotary joint of the engineering machinery.

[0033] Figure 27 This is a side view showing the main parts of an engineering machine involved in another variation of the described embodiment.

[0034] Figure 28 This is a rear view showing the main parts of an engineering machine involved in another variation of the described embodiment.

[0035] Figure 29 It is shown Figure 28A side view of the main parts of the engineering machinery.

[0036] Figure 30 This is a rear view of an engineering machine relating to yet another variation of the described embodiment.

[0037] Figure 31 This is a rear view of an engineering machine relating to yet another variation of the described embodiment.

[0038] Figure 32 This is a top view illustrating another variation of the described embodiment of the engineering machinery.

[0039] Figure 33 This is a top view illustrating another variation of the described embodiment of the engineering machinery.

[0040] Figure 34 This is a side view illustrating another variation of the described embodiment of the engineering machinery. Detailed Implementation

[0041] Embodiments of this disclosure are described with reference to the accompanying drawings.

[0042] like Figure 1 and Figure 2 As shown, the construction machinery 100 includes: a lower traveling body 1 with a traveling device; an upper rotating body 2 supported on the lower traveling body 1 such that it can rotate relative to the lower traveling body 1 about a vertically extending slewing axis Z; and a working device 3 supported on the upper rotating body 2. The construction machinery 100 in this embodiment is a hydraulic excavator; however, the construction machinery disclosed herein is not limited to hydraulic excavators and may also be other construction machinery such as cranes or bulldozers. The traveling device may be... Figure 1 The tracked traveling device shown can also be a traveling device with tires omitted in the figure. The tracked traveling device includes: a track frame extending in one direction; two wheels rotatably supported at one end and the other end of the track frame; and a track ring-shaped (endless) supported on the two wheels. The track comprises multiple track plates interconnected.

[0043] Furthermore, the front-back and left-right directions shown in the diagram are based on the direction of the upper rotating body 2. Specifically, the front-back direction is a horizontal direction parallel to the long side of the working device 3 when viewed from above, and the left-right direction is a horizontal direction orthogonal to the front-back direction.

[0044] The working device 3 includes: a boom 4 mounted on the upper rotating body 2 in an undulating manner, a stick 5 mounted on the boom 4 in a rotatable manner, and a distal attachment 6 mounted on the stick 5 in a rotatable manner. In this embodiment, the distal attachment 6 is a bucket; however, the distal attachment can also be other distal attachments, such as a grab bucket, forks, a crusher, etc.

[0045] The upper rotating body 2 includes a frame 20, a cockpit 11 supported on the frame 20, a counterweight 12, and an outer wall 13. The outer wall 13 is, for example, box-shaped, used to define a machinery compartment 14. Various equipment is housed inside the machinery compartment 14. The various equipment housed in the machinery compartment 14 will be described later. The upper rotating body 2 is an example of a machine body.

[0046] The fuselage frame 20 is a component that can rotate and support the lower traveling body 1. The fuselage frame 20 includes a frame body 21 and a vertical body 22. The frame body 21 supports the cab 11 and the outer wall 13. The frame body 21 has an upper surface that extends in all directions and is large enough to support the cab 11 and the outer wall 13. The vertical body 22 supports the boom 4 in an undulating manner. The vertical body 22 includes a boom mounting portion 22A for mounting... Figure 1 The base end 4A of the boom 4 is shown in dashed lines. The boom mounting part 22A forms the front part of the vertical body 22.

[0047] For example, the cab 11 is located at the front left of the frame body 21. The counterweight 12 is a weight used to maintain balance, and it is located at the rear of the frame body 21 or further rearward than the frame body 21. The cab 11 is equipped with a driver's seat, control levers, control pedals, etc.

[0048] like Figure 1 As shown by the dashed line, the vertical body 22 has a shape that stands upright from the frame body 21 and extends in the front-to-back direction. The vertical body 22 includes a rear portion 22B located behind the boom mounting portion 22A (front portion). The rear portion 22B is a portion with a lower height than the boom mounting portion 22A, and it is located behind the boom mounting portion 22A.

[0049] In this embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the vertical body 22 includes left and right vertical plates 23, 23 that are spaced apart from each other. The left and right vertical plates 23, 23 are plate-shaped members that are erected from the frame body 21 and are arranged to extend back and forth.

[0050] The construction machinery 100 is equipped with multiple actuators. Each actuator operates by receiving working oil supplied by the hydraulic pump 62, which will be described later. The multiple actuators include a boom cylinder 7 for raising and lowering the boom 4, a stick cylinder 8 for rotating the stick 5, a remote auxiliary device cylinder 9 for rotating the remote auxiliary device 6, and a hydraulic motor 64 for rotating the upper slewing body 2 relative to the lower traveling body 1.

[0051] The machine room 14 houses multiple equipment assemblies, which will be described later. The machine room 14 is formed in the upper surface of the frame body 21, excluding the area for mounting the cab 11, the area for mounting the base end 4A of the boom 4, and the area for mounting the counterweight 12. For example, the machine room 14 may be formed in the space behind the cab 11 (i.e., the rear space), or in the space to the side (e.g., the right side) of the cab 11 (i.e., the side space), or in both the rear and side spaces. Furthermore, if the weight of the equipment housed inside the machine room 14 is large, the counterweight 12 can be omitted.

[0052] The outer wall 13, for example, has a box shape to define the machine room 14. Figure 1 and Figure 2 As shown, an air inlet 16 and an exhaust outlet 17 are formed on the outer wall 13. The air inlet 16 is an opening for drawing in air from outside the machine room 14 as cooling air CA into the machine room 14. The exhaust outlet 17 is an opening for discharging the cooling air CA from inside the machine room 14 to the outside of the machine room 14. The locations where the air inlet 16 and exhaust outlet 17 are formed are not particularly limited; however, in this embodiment, the air inlet 16 is formed on a side portion of the outer wall 13 (e.g., the right side portion), and the exhaust outlet 17 is formed on another side portion of the outer wall 13 (e.g., the left side portion).

[0053] The construction machinery 100 comprises multiple equipment groups. These equipment groups include a hydrogen equipment group 40, a high-voltage equipment group 50, a hydraulic equipment group 60, and a cooling equipment group 70. According to... Figure 2 In the specific example shown, the hydrogen equipment group 40 is located in the area near the center of the rear of the upper rotating body 2, the cooling equipment group 70 is located in the area near the left side of the rear of the upper rotating body 2, and the high-voltage equipment group 50 and the hydraulic equipment group 60 are located in areas outside these regions. However, the areas used to configure each equipment group are not limited to these regions. Figure 2 The specific examples shown are as follows.

[0054] The hydrogen equipment assembly 40 includes a hydrogen tank 41, a fuel cell unit 42, and a hydrogen filling port 44. The hydrogen tank 41 is connected to the fuel cell unit 42 via a fuel line 40A. The hydrogen filling port 44 is connected to the hydrogen tank 41 via a hydrogen filling line 40B.

[0055] The hydrogen tank 41 is a container for storing hydrogen. In this embodiment, the hydrogen tank 41 is positioned above the fuel cell unit 42. The hydrogen tank 41 may also be supported within the machine compartment 14 by a tank support member (not shown in the figure). A pressure reducing valve 45 may be installed on the fuel line 40A. In this case, the high-pressure hydrogen stored in the hydrogen tank 41 is reduced in pressure by the pressure reducing valve 45. The reduced-pressure hydrogen is then supplied to the fuel cell unit 42 through the fuel line 40A.

[0056] The fuel cell device 42 includes a fuel cell 42A. The fuel cell 42A is used to generate electricity by electrochemically reacting hydrogen supplied by the hydrogen tank 41 with oxygen (e.g., oxygen contained in the air). For example, the fuel cell 42A may be a fuel cell stack containing multiple cells.

[0057] The hydrogen filling port 44 has a filling port that connects to the hydrogen filling pipe 40B. When filling hydrogen tank 41, hydrogen is filled into hydrogen tank 41 by connecting the nozzle of the hydrogen filling device (not shown in the figure) to the hydrogen filling port 44. After filling hydrogen tank 41, the nozzle of the hydrogen filling device is removed from the hydrogen filling port 44.

[0058] The high-voltage equipment group 50 includes an inverter 51 and a motor 52. The inverter 51 is connected to the fuel cell unit 42 via a cable (omitted in the figure). The inverter 51 is also connected to the motor 52 via a cable (omitted in the figure).

[0059] Inverter 51 converts the direct current supplied by fuel cell unit 42 into three-phase alternating current and supplies it to motor 52. Inverter 51 regulates the speed of motor 52.

[0060] Electric motor 52 is the drive source for driving hydraulic pump 62. Electric motor 52 operates by receiving power supplied by fuel cell unit 42 via inverter 51. For example, electric motor 52 is a three-phase motor.

[0061] The high-voltage equipment group 50 may further include a battery 53. For example, the battery 53 may be a lithium-ion battery or other types of batteries. The motor 52 may also operate by receiving power supplied by the battery 53 via an inverter 51. The inverter 51 may also convert the DC current supplied by the battery 53 into three-phase AC current and supply it to the motor 52. In addition, the battery 53 may also be charged by receiving power supplied by the fuel cell device 42.

[0062] The high-voltage equipment group 50 may also include a repeater 55 (junction box). The repeater 55 has the function of combining the power output from the fuel cell unit 42 and the power output from the battery 53, as well as the function of distributing power to multiple high-voltage equipment such as the inverter 51 and the converter 54 described later.

[0063] The high-voltage equipment group 50 may also include a converter 54 (DC-CDC converter). The converter 54 is used to reduce the high voltage output from the repeater 55. The converter 54 supplies the reduced low-voltage power to the low-voltage equipment group.

[0064] The hydraulic equipment assembly 60 includes a working oil tank 61, a hydraulic pump 62, a control valve 63, and a hydraulic motor 64. The working oil tank 61 is a container for storing working oil. The hydraulic pump 62 is driven by an electric motor 52 to pump working oil. The hydraulic pump 62 is connected to the electric motor 52 via a shaft coupling (omitted in the figure). The hydraulic motor 64 operates by receiving working oil supplied by the hydraulic pump 62 through the control valve 63. The control valve 63 opens and closes according to lever or pedal operations applied by the operator to an operating device (omitted in the figure), thereby supplying working oil from the hydraulic pump 62 to the actuator corresponding to that operation.

[0065] The cooling equipment assembly 70 includes a cooling fan 71 and a heat exchanger. The heat exchanger may include at least one of an oil cooler 72 and a radiator 73.

[0066] Cooling fan 71 generates a flow of cooling air CA within the machine chamber 14. That is, cooling fan 71 generates a flow of cooling air CA from inlet 16 to outlet 17 within the machine chamber 14. Cooling fan 71 has: an impeller comprising a shaft portion and a plurality of blades arranged along its outer circumference; and a fan motor for driving the impeller. For example, power is supplied to the fan motor by fuel cell device 42 or battery 53 via repeater 55, thereby rotating the impeller of cooling fan 71. Cooling fan 71 may further have a shroud configured to surround the impeller.

[0067] Oil cooler 72 can be configured to cool the working oil discharged from the equipment included in the hydraulic equipment assembly 60. The working oil discharged from control valve 63 reaches oil cooler 72 through an oil cooler pipe (omitted in the figure), and is cooled by heat exchange with cooling air CA in oil cooler 72 before returning to working oil tank 61 through an oil cooler pipe (omitted in the figure). Thus, the working oil is cooled.

[0068] The radiator 73 can be configured to cool the fuel cell unit 42. Specifically, for example, the radiator 73 can be connected to the fuel cell unit 42 via radiator pipes 74 and 75. Cooling water circulates between the fuel cell unit 42 and the radiator 73 via a water pump. The cooling water is cooled by heat exchange with the cooling air CA in the radiator 73, and then supplied to the fuel cell unit 42 via the radiator pipe 74, thereby cooling the fuel cell unit 42. The cooling water after passing through the fuel cell unit 42 returns to the radiator 73 via the radiator pipe 75.

[0069] Multiple equipment groups may also include low-voltage equipment groups. For example, a low-voltage equipment group may include the water pump and controller 90. The water pump circulates cooling water between the fuel cell unit 42 and the radiator 73 via radiator pipes 74 and 75.

[0070] The controller 90 controls the movement of the construction machinery 100. The controller 90 includes a computer comprising a processing unit and a memory. The controller 90 is configured to control the movement of the construction machinery 100 by executing a program stored in the memory through the processing unit.

[0071] Next, regarding Figures 1 to 5 The features of the construction machinery 100 involved in this embodiment, as shown in the figure, will be described.

[0072] [Characteristic 1] The construction machinery 100 according to this embodiment has the following first feature: the fuel cell device 42 has a device drain outlet 43, and the construction machinery 100 includes a drain pipe 30 connected to the device drain outlet 43, the drain pipe 30 being positioned at a height lower than or equal to that of the device drain outlet 43. According to the construction machinery 100 having this first feature, compared to when the drain pipe 30 is positioned upwards towards the upper part of the upper rotating body 2 (machine body), water discharged from the fuel cell device 42 is less likely to remain in the drain pipe 30.

[0073] Because water is less likely to remain inside the drain pipe 30, freezing of the water inside the drain pipe 30 can be prevented, for example, in low-temperature environments below 0°C. Furthermore, because water is less likely to remain inside the drain pipe 30, it is less likely to remain inside the fuel cell unit 42. And because water is less likely to remain inside the fuel cell unit 42, the reaction of hydrogen and oxygen within the fuel cell can be prevented from being hindered.

[0074] The drain pipe 30 has an inlet 31 connected to the drain outlet 43 of the device; the drain pipe 30 is located at a height lower than or equal to the inlet 31. The drain pipe 30 may be configured such that the entire drain pipe 30 is at the same height as the drain outlet 43 of the device, however, it is preferred that the inlet 31 and the portion near it, i.e., the base end, are at the same height as the drain outlet 43 of the device, while the portion other than the inlet 31 and the base end is lower than the drain outlet 43 of the device.

[0075] The fuel cell device 42 may include a housing 42B for housing the fuel cell 42A, in which case a device drain outlet 43 may be formed on the housing 42B. In this embodiment, the device drain outlet 43 is formed on the side of the housing 42B; however, the location of the device drain outlet 43 is not limited to the side of the housing 42B, for example, it may be on the bottom surface of the housing 42B or the upper surface of the housing 42B. More specifically, the device drain outlet 43 is formed on the lower part of the side of the housing 42B.

[0076] In the fuel cell device 42, water (water vapor) is generated through a chemical reaction, and the generated water is discharged from the device drain port 43. The water discharged from the device drain port 43 of the fuel cell device 42 may contain both liquid water and gaseous water (water vapor), or it may contain only one of the two states. The water vapor discharged from the device drain port 43 may condense inside the drain pipe 30.

[0077] [Second Feature] The construction machinery 100 according to this embodiment also has the following second feature. That is, the drain pipe 30 of the construction machinery 100 has a drain outlet 32, which is located below the device drain outlet 43. In this case, water in the drain pipe 30 is more likely to be discharged from the drain outlet 32, and therefore water is less likely to remain in the drain pipe 30.

[0078] The drain pipe 30 preferably has a shape that allows water within the drain pipe 30 to flow towards the drain outlet 32 ​​by its own weight. In this embodiment, the drain pipe 30 is configured not to have an upwardly extending portion (both parallel to the vertical direction and obliquely upwardly extending portions) from the pipe inlet 31 towards the drain outlet 32, and the entire drain pipe 30 is located at the same height as or lower than the device drain outlet 43, wherein the pipe inlet 31 is the upstream end of the drain pipe 30 connected to the device drain outlet 43, and the pipe drain outlet 32 ​​is the downstream end for discharging water from the drain pipe 30. In other words, when the direction of water flow from the pipe inlet 31 to the pipe drain outlet 32 ​​is called the water flow direction, the drain pipe 30 does not have an upwardly extending portion (both parallel to the vertical direction and obliquely upwardly extending portions) in this water flow direction.

[0079] As in this embodiment, when the device drain outlet 43 is formed on the side of the fuel cell device 42 (the side of the housing 42B), the drain pipe 30 may include a lateral portion 30A (upstream lateral portion 30A) and a downward portion 30B. The lateral portion 30A is the portion extending laterally from the device drain outlet 43, and the downward portion 30B is the portion extending downward from the lateral portion 30A. In this case, the drain outlet 32 ​​may be formed on the downward portion 30B. Although omitted in the figure, when the device drain outlet 43 is formed on the bottom surface of the fuel cell device 42 (the bottom surface of the housing 42B), the drain pipe 30 may include a downward portion extending downward from the device drain outlet 43. In this case, the lateral portion can be omitted.

[0080] In this embodiment, "downward" can be a downward direction parallel to the vertical direction, or a downward (obliquely downward) direction inclined relative to the vertical direction. That is, the downward portion 30B of the drain pipe 30 may include at least one of a portion extending in a downward direction parallel to the vertical direction and a portion extending obliquely downward. Furthermore, the downward portion 30B may include at least one of a portion extending downward in a straight line and a portion extending downward while bending. Figure 4 and Figure 5 In the specific example shown, the downward portion 30B includes a portion extending obliquely downward from the transverse portion 30A and a portion extending downward in a direction parallel to the vertical direction from that portion; however, the shape of the drain pipe 30 is not limited to... Figure 4 and Figure 5 The specific examples shown are as follows.

[0081] [Third Feature] The construction machinery 100 according to this embodiment also has the following third feature. That is, the drain outlet 32 ​​of the construction machinery 100 is formed at the lowest part of the drain pipe 30. In this case, the water in the drain pipe 30 flows to the lowest part of the drain pipe 30 and is smoothly discharged from the drain outlet 32 ​​formed at the lowest part.

[0082] [Fourth Feature] The construction machinery 100 according to this embodiment also has the following fourth feature. That is, the drain pipe 30 of the construction machinery 100 extends into the opening 24 formed in the frame 20 (specifically the frame body 21), and the drain outlet 32 ​​is disposed in the opening 24, or disposed below the opening 24. In this case, water in the drain pipe 30 can be discharged from the drain outlet 32 ​​disposed in the opening 24 or the drain outlet 32 ​​disposed below the opening 24 to a position below the frame 20. Accordingly, water will not be discharged from the drain pipe 30 into the machine room 14 of the upper rotating body 2.

[0083] The drain pipe 30 passes through the opening 24 formed in the body frame 20, while the drain outlet 32 ​​can be located below the opening 24.

[0084] The main frame 21 of the fuselage frame 20 is located below the fuel cell device 42. The fuel cell device 42 is mounted on the main frame 21 of the fuselage frame 20, thereby supporting the fuselage frame 20. Figures 3 to 5 In the specific example shown, the frame 20 has a device support member 25 fixed to the frame body 21, on which the fuel cell device 42 is supported. The device support member 25 may include multiple legs (e.g., four legs) and a top plate supporting the multiple legs, in which case the fuel cell device 42 may be disposed on the top plate. Each of the multiple legs may include a mounting base for suppressing the transmission of vibration to the fuel cell device 42.

[0085] [Fifth Feature] The construction machinery 100 according to this embodiment also has the following fifth feature. That is, the body frame 20 of the construction machinery 100 includes at least one structural member and at least one non-structural member. The opening 24 of the body frame 20 can be formed in the non-structural member or between the structural member and the non-structural member. In this case, it is not necessary to form an opening in the structural member of the body frame 20 to discharge water in the drain pipe 30 from the drain outlet 32 ​​to the bottom of the body frame 20.

[0086] The structural members are those that resist loads and impart rigidity and strength to the body frame 20 among the multiple members constituting the frame 20, such as beams, columns, etc. The non-structural members are those that contribute less to the rigidity and strength of the body frame 20 than the structural members. The at least one structural member may, for example, include multiple beams. The multiple beams may, for example, include one or more longitudinal beams extending forward and backward. The multiple longitudinal beams may include a right longitudinal beam 28 located at the right end of the body frame 20, a left longitudinal beam 28 located at the left end of the body frame 20, or vertical plates 23 extending forward and backward. Furthermore, the multiple beams may also include one or more horizontal beams 26 extending left and right. The at least one non-structural member may, for example, include multiple plate-like members 27. For example, the multiple plate-like members 27 may be arranged to span between adjacent horizontal beams 26.

[0087] The opening 24 of the frame 20 is a region that extends through the frame 20 in the vertical direction. The opening 24 can be a through hole formed in the plate-like member 27, a gap formed between the crossbeam 26 and the plate-like member 27, or a gap formed between the vertical plate 23 and the plate-like member 27. In addition, the opening 24 can be a gap formed between two structural members or a gap formed between two non-structural members.

[0088] [Sixth Feature] The construction machinery 100 according to this embodiment also has the following sixth feature. That is, the drain pipe 30 of the construction machinery 100 has a downward portion 30B, which is a portion that extends downward away from the structural member. At this time, while satisfying the constraint that no opening is formed on the structural member of the body frame 20, and suppressing the length of the drain pipe 30 from increasing, the drain outlet 32 ​​can be arranged at the opening 24 formed in the body frame 20, or the drain pipe 30 can pass through the opening 24 and the drain outlet 32 ​​can be located below the opening 24. Accordingly, the pressure loss in the drain pipe 30 can be reduced, and the drainage efficiency of the drain pipe 30 is not easily reduced. The drain outlet 32 ​​can be formed at the lower end of the downward portion 30B. Furthermore, the downward portion 30B of the drain pipe 30 is preferably arranged in a downward extending manner adjacent to the structural member. Accordingly, while satisfying the constraint, the drain pipe 30 can be laid out with the shortest path.

[0089] In this embodiment, such as Figure 2 and Figure 3 As shown, the fuel cell device 42 is positioned to overlap with at least a portion of the vertical structure 22 when viewed from above. Specifically, the fuel cell device 42 is positioned directly above the rear portion 22B of the vertical structure 22. The inlet 31 of the drain pipe 30 is connected to a device drain outlet 43 formed on the side of the fuel cell device 42. The downward portion 30B of the drain pipe 30 extends downward at a position that avoids one side of the vertical plate 23 (the right-side vertical plate 23) and is adjacent to the side surface (right side) of the vertical plate 23, and passes through an opening 24 formed adjacent to the vertical plate 23.

[0090] [Variation Example] Below, refer to Figures 6 to 21 The features of the construction machinery 100 according to the modifications 1 to 3 of this embodiment will be described. The construction machinery 100 according to the modifications 1 to 3 respectively have the features 1 to 6 described above, and also have the features 7 to 11 described below. Figures 6 to 10 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Modification Example 1. Figures 11 to 15 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Modification Example 2. Figures 16 to 21 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Modification Example 3.

[0091] [Seventh Feature] The engineering machinery 100 involved in Modifications 1 to 3 also includes a drain receiver 80 for receiving water guided by the drain pipe 30. According to Modifications 1 to 3, the drain receiver 80 is configured to receive water discharged from the drain outlet 32 ​​of the drain pipe 30.

[0092] The drain receiver 80 has at least one of the following functions: accumulation, gas-liquid separation, splash suppression, and protection. The accumulation function accumulates water flowing into the drain receiver 80 after being discharged from the drain pipe 30. The gas-liquid separation function separates the water flowing into the drain receiver 80 after being discharged from the drain pipe 30 into liquid water and gaseous water (water vapor). The splash suppression function suppresses the splashing of water discharged from the drain outlet 32 ​​of the drain pipe 30. Because the splashing of water from the drain outlet 32 ​​is suppressed, water is less likely to splash onto various components located around the drain outlet 32, such as the chassis frame 20, the slewing bearing, and the frame (body, axle, etc.) of the lower running gear 1. This reduces the cost of rust prevention treatment for these components. The protection function prevents stones, rocks, and metal components (e.g., steel) on the ground from impacting the drain pipe 30 from below the chassis frame 20, thus protecting the drain pipe 30 (bottom cover function).

[0093] When the drain receiver 80 has a storage function, it is not necessary for the drain receiver 80 to have a drain outlet. In this case, when the water in the drain receiver 80 accumulates to a certain level, operators and other relevant personnel can perform the operation of draining the water accumulated in the drain receiver 80.

[0094] like Figure 6 and Figure 7 The variation shown is Example 1. Figure 11 and Figure 12 The modified example 2 and Figure 16 and Figure 17 As shown in Modification 3, the drain receiver 80 can be a box-shaped container with an upper wall 80A, a lower wall 80B, and a side wall 80C. The drain receivers 80 in Modifications 1 to 3 are respectively positioned to receive water discharged from the drain outlet 32 ​​of the drain pipe 30. Accordingly, each drain receiver 80 has a storage function, a splash suppression function, and a protection function.

[0095] Since the drain receiver 80 has not only a lower wall 80B and a side wall 80C, but also an upper wall 80A, it can prevent water vapor in the drain receiver 80 from entering the machine room 14 through the opening 24.

[0096] The drainage receiver 80 involved in variations 1 to 3 also has the features involved in the eighth scheme described below.

[0097] [Characteristic 8] According to the various engineering machinery 100s involved in the modifications 1 to 3, the drainage receiver 80 has a storage section 84 capable of storing water and a receiver drain outlet 82 capable of discharging the water stored in the storage section 84. In this case, each drainage receiver 80 has a storage function for temporarily storing water, and also has a function for discharging a portion of the water stored in the drainage receiver 80 from the receiver drain outlet 82.

[0098] First, let's explain variation example 1. For example... Figure 8 As shown, Figure 6 and Figure 7 The modified example 1 shown involves a drain receiver 80 mounted on the lower surface of the frame body 21 of the body frame 20. The drain receiver 80 has a receiver inlet 85 and a receiver outlet 82, the receiver inlet 85 for receiving water from the drain outlet 32 ​​of the drain pipe 30. The receiver inlet 85 is formed on the upper wall 80A of the drain receiver 80, and the receiver outlet 82 is formed on the lower wall 80B of the drain receiver 80.

[0099] A drain pipe 30 is connected to the receiver inlet 85. Specifically, the downward portion 30B of the drain pipe 30 is connected to the upper wall 80A of the drain receiver 80 at a location corresponding to the receiver inlet 85.

[0100] The lower wall 80B includes a first lower wall 80B1 located at a position corresponding to the accumulation section 84 and a second lower wall 80B2 located at a position offset laterally relative to the first lower wall 80B1. The first lower wall 80B1 is located at a lower position than the second lower wall 80B2. Accordingly, water flowing into the drain receiver 80 is accumulated in the accumulation section 84. Figure 6 and Figure 7 In the specific example shown, the receiver drain 82 is formed on the first lower wall 80B1, but it can also be formed on the second lower wall 80B2.

[0101] according to Figure 7 As shown in the side view, the receiver drain outlet 82 is formed at a position offset horizontally relative to the receiver inlet 85. Therefore, even though the receiver drain outlet 82 is formed on the first lower wall 80B1, water flowing into the drain receiver 80 from the receiver inlet 85 is temporarily stored in the storage section 84, at least before water reaches the receiver drain outlet 82 from the receiver inlet 85. When the receiver drain outlet 82 is formed on the second lower wall 80B2, that is, when the receiver drain outlet 82 is formed at a position higher than the bottom surface of the storage section 84, water can be stored in the storage section 84 before the height (water level) of the water stored in the storage section 84 reaches the height of the receiver drain outlet 82.

[0102] According to variation example 1, such as Figure 10 As shown, the position of the receiver drain port 82 can be set such that when the upper rotating body 2 is configured in a posture where the extension direction of the track travel device of the lower traveling body 1 (the extension direction of the track frame) is consistent with the front-rear direction of the upper rotating body 2, the water discharged from the receiver drain port 82 will not splash onto the lower traveling body 1 (e.g., the track travel device). And when the upper rotating body 2 rotates relative to the lower traveling body 1, as... Figure 9 As shown, water discharged from the receiver drain 82 may sometimes splash onto the lower walking body 1 (e.g., tracked walking device).

[0103] The following is an explanation of variation example 2. For example... Figure 13 As shown, Figure 11 and Figure 12 The modified example 2 shown involves a drain receiver 80 mounted on the lower surface of the frame body 21 of the body frame 20. The drain receiver 80 has a receiver inlet 85 and a receiver outlet 82, the receiver inlet 85 for receiving water from the drain outlet 32 ​​of the drain pipe 30. The receiver inlet 85 is formed on the upper wall 80A of the drain receiver 80.

[0104] The lower wall 80B of the drain receiver 80, when viewed from above, is polygonal (e.g., quadrilateral) in shape with multiple sides, and at least one of the sides corresponds to a portion where no sidewall exists. At least a portion of the area (opening) corresponding to this portion where no sidewall exists functions as a drain outlet 82 for the receiver. Figure 12 and Figure 14 In the specific example shown, the lower wall 80B of the drain receiver 80 is arranged in an inclined position relative to the horizontal plane, so the portion corresponding to the end of the lowest part of the lower wall 80B functions as the receiver drain outlet 82. Alternatively, the receiver drain outlet 82 may be formed by a through hole penetrating the lower wall 80B of the drain receiver 80.

[0105] like Figure 12 As shown, the lower end of the drain pipe 30 is close to or connected to the upper surface of the lower wall 80B of the drain receiver 80. Specifically, the lower end of the downward portion 30B of the drain pipe 30 is close to or connected to the upper surface of the lower wall 80B of the drain receiver 80. The portion 301 of the lower end of the downward portion 30B near the receiver drain outlet 82 is located closer to the upper surface of the lower wall 80B of the drain receiver 80 than the portions other than this portion. Specifically, this portion 301 is connected to the upper surface of the lower wall 80B, while the portions other than this portion 301 extend upwards from the upper surface of the lower wall 80B. The area extending upwards from the upper surface of the lower wall 80B functions as the drain outlet 32 ​​of the drain pipe 30. Figure 11In the specific example shown, the lower end of the downward portion 30B of the drain pipe 30 is located at a position corresponding to the end of the lower wall 80B of the drain receiver 80. However, the relative position of the lower end of the downward portion 30B with respect to the drain receiver 80 is not limited to... Figure 11 Specific examples are shown. For instance... Figure 11 As shown, the drain outlet 32 ​​of the drain pipe 30 is formed at a position offset in the horizontal direction relative to the receiver drain outlet 82.

[0106] The lower wall 80B of the drain receiver 80 is arranged in an inclined position relative to the horizontal plane, so that water flowing into the drain receiver 80 from the drain outlet 32 ​​of the drain pipe 30 can be temporarily stored in the storage section 84 at least before the water reaches the receiver drain outlet 82 from the drain outlet 32.

[0107] According to variation example 2, such as Figure 15 As shown, the position of the receiver drain port 82 can be set such that when the upper rotating body 2 is configured in a posture where the extension direction of the track travel device of the lower traveling body 1 (the extension direction of the track frame) is consistent with the front-rear direction of the upper rotating body 2, the water discharged from the receiver drain port 82 will not splash onto the lower traveling body 1 (e.g., the track travel device). And when the upper rotating body 2 rotates relative to the lower traveling body 1, as... Figure 14 As shown, water discharged from the receiver drain 82 may sometimes splash onto the lower walking body 1 (e.g., tracked walking device).

[0108] The following is an explanation of variation example 3. For example... Figure 18 As shown, Figure 16 and Figure 17 The variation 3 shown involves a drain receiver 80 mounted on the lower surface of the frame body 21 of the housing frame 20. The drain receiver 80 has a receiver inlet 85 and a receiver outlet 82, the receiver inlet 85 for receiving water from the drain outlet 32 ​​of the drain pipe 30. The receiver inlet 85 is formed on the upper wall 80A of the drain receiver 80.

[0109] according to Figure 17 In the specific example shown, the lower wall 80B includes a first lower wall 80B1 located at a position corresponding to the accumulation section 84 and a second lower wall 80B2 located at a position offset laterally relative to the first lower wall 80B1. The first lower wall 80B1 is located at a lower position than the second lower wall 80B2. Accordingly, water flowing into the drain receiver 80 is accumulated in the accumulation section 84. Figure 17 In the specific example shown, the receiver drain outlet 82 is formed on or near the first lower wall 80B1, but it can also be formed on the second lower wall 80B2. According to... Figure 17In the specific example shown, the receiver drain outlet 82 is formed at the boundary between the lower wall 80B and the side wall 80C; however, the location of the receiver drain outlet 82 is not limited to... Figure 16 The specific example shown. According to... Figure 19 In the specific example shown, the lower wall 80B of the drain receiver 80 is arranged in an inclined position relative to the horizontal plane, and a receiver drain outlet 82 is formed at a position corresponding to the end of the lowest part of the lower wall 80B. Additionally, as... Figure 17 As shown, the drain receiver 80 may include a partition 80D for dividing the space within the drain receiver 80 into a storage section 84 and a portion other than the storage section 84.

[0110] According to variation example 3, such as Figure 16 and Figure 21 As shown, the drain pipe 30 includes a downstream lateral portion 30C, which extends laterally between the lower surface of the body frame 20 and the bottom surface of the drain receiver 80 (the upper surface of the lower wall 80B). The drain outlet 32 ​​is formed at the distal end of the downstream lateral portion 30C. The downstream lateral portion 30C will be described later.

[0111] According to variation example 3, such as Figure 20 As shown, the position of the receiver drain port 82 can be set such that when the upper rotating body 2 is configured in a posture where the extension direction of the track travel device of the lower traveling body 1 (the extension direction of the track frame) is consistent with the front-rear direction of the upper rotating body 2, the water discharged from the receiver drain port 82 will not splash onto the lower traveling body 1 (e.g., the track travel device). And when the upper rotating body 2 rotates relative to the lower traveling body 1, as... Figure 19 As shown, water discharged from the receiver drain 82 may sometimes splash onto the lower walking body 1 (e.g., tracked walking device).

[0112] The drainage receiver 80 involved in variations 1 to 3 also has the features involved in the ninth scheme described below.

[0113] [9th Feature] Figure 6 and Figure 7 The variation shown is Example 1. Figure 11 and Figure 12 The modified example 2 and Figure 16 and Figure 17The modified example 3 involves a drainage receiver 80 that also has a water vapor outlet 83 for discharging water vapor. Each drainage receiver 80 is capable of discharging liquid water from the receiver drain 82 and gaseous water (water vapor) from the water vapor outlet 83. In this case, the drainage receiver 80 has a gas-liquid separation function that separates the water flowing into the drainage receiver 80 after being discharged from the drain pipe 30 into liquid water and gaseous water (water vapor), that is, it has the function of discharging liquid water and water vapor from the drainage receiver 80 separately.

[0114] [Tenth Feature] According to modifications 1 to 3, a receiver drain port 82 is formed at the lower part of the drain receiver 80, while a water vapor outlet 83 is formed at the side of the drain receiver 80. In this case, the drain receiver 80 can discharge liquid water from the drain port 82 formed at the lower part of the drain receiver 80, and discharge gaseous water (water vapor) from the water vapor outlet 83 formed at the side of the drain receiver 80. Specifically, as follows.

[0115] according to Figure 6 and Figure 7 The modified example 1 involves a drainage receiver 80, in which a receiver drain outlet 82 is formed on the lower wall 80B and a water vapor outlet 83 is formed on the side wall 80C. Specifically, the receiver drain outlet 82 is formed in the lower wall 80B at a position corresponding to the accumulation section 84 on the first lower wall 80B1, and the water vapor outlet 83 is formed on the side wall 80C, which is erected from the end of the second lower wall 80B2, which is located at a position higher than the first lower wall 80B1. The water vapor outlet 83 is formed at a position higher than the receiver drain outlet 82. The drainage receiver 80 can discharge liquid water from the receiver drain outlet 82, which is located at a relatively lower position, and discharge gaseous water (water vapor) from the water vapor outlet 83, which is located at a relatively higher position. The liquid water in the drainage receiver 80 falls downward from the receiver drain outlet 82, and the gaseous water (water vapor) in the drainage receiver 80 is discharged laterally from the water vapor outlet 83. Figure 8 and Figure 9 The specific example shown is that the drain receiver 80 is configured such that water vapor inside the drain receiver 80 is discharged rearward from the water vapor outlet 83; however, the direction of water vapor discharge is not limited to... Figure 8 and Figure 9 The specific examples shown can also be other directions such as right, left, front, bottom, top, etc.

[0116] according to Figure 11 and Figure 12The modified example 2 involves a drainage receiver 80, as described above, in which the receiver drain outlet 82 is formed by at least a portion of the opening region corresponding to the portion of one of the plurality of sides of the lower wall 80B where there is no sidewall. Specifically, the receiver drain outlet 82 is formed by the lowest portion of this opening region. Furthermore, as... Figure 11 As shown, the water vapor outlet 83 is formed by this opening area. Liquid water in the drain receiver 80 falls downward from the receiver drain port 82, and gaseous water (water vapor) in the drain receiver 80 is discharged laterally from the water vapor outlet 83. According to Figure 13 The specific example shown is that the drain receiver 80 is configured such that water vapor inside the drain receiver 80 is discharged to the right from the water vapor outlet 83; however, the direction of water vapor discharge is not limited to... Figure 13 The specific examples shown can also be other directions such as behind, left, front, below, and above.

[0117] according to Figure 16 and Figure 17 The modified example 3 involves a drainage receiver 80, as described above, in which a receiver drain outlet 82 is formed at the boundary between the lower wall 80B and the side wall 83C, while a water vapor outlet 83 is formed on the side wall 83C. Liquid water within the drainage receiver 80 falls downward from the receiver drain outlet 82, and gaseous water (water vapor) within the drainage receiver 80 is discharged laterally from the water vapor outlet 83. According to... Figure 18 and Figure 19 The specific example shown is that the drain receiver 80 is configured such that water vapor inside the drain receiver 80 is discharged rearward from the water vapor outlet 83; however, the direction of water vapor discharge is not limited to... Figure 18 and Figure 19 The specific examples shown can also be other directions such as right, left, front, bottom, top, etc.

[0118] [Characteristic 11] According to modifications 1 to 3, the drain receiver 80 is disposed below the body frame 20 and configured to receive water discharged from the drain outlet 32. In this case, the drain receiver 80 can receive water discharged from the drain outlet 32 ​​of the drain pipe 30 below the body frame 20. The drain receiver 80 is mounted on the lower surface of the body frame 20. The drain receivers 80 involved in modifications 1 to 3 respectively have a storage function and a gas-liquid separation function. In addition, each drain receiver 80 is disposed below the body frame 20, thereby also having a splash suppression function and a protection function. By giving the drain receiver 80 various functions, it is not necessary to configure components separately according to function.

[0119] Figures 16 to 21 The engineering machinery 100 involved in the modified example 3 shown also has the following 12th to 13th features.

[0120] [Characteristic 12] According to Variation 3, the drain receiver 80 is disposed below the body frame 20, and the drain pipe 30 is included in a downstream transverse portion 30C extending laterally between the body frame 20 (lower surface of the frame body 21) and the bottom surface of the drain receiver 80 (upper surface of the lower wall 80B). A drain outlet 32 ​​is formed at the distal end of the downstream transverse portion 30C. In this case, compared to forming the drain outlet 32 ​​at the lower end of the downwardly extending portion, even if the thickness (vertical dimension) of the drain receiver 80 is designed to be smaller, such as... Figure 17 As shown, it is also easy to ensure the distance between the drain outlet 32 ​​and the inner surface (inner side surface of the side wall 80C) of the drain receiver 80. In this way, the pressure loss when the drain pipe 30 discharges water can be reduced, thereby suppressing the reduction of the drainage efficiency of the drain pipe 30.

[0121] according to Figure 16 In the specific example shown, the drain receiver 80 has not only a lower wall 80B but also an upper wall 80A; therefore, the downstream lateral portion 30C of the drain pipe 30 extends laterally between the upper wall 80A and the lower wall 80B. According to... Figure 17 In the specific example shown, the downstream lateral portion 30C of the drain pipe 30 extends laterally along the first lower wall 80B1 of the lower wall 80B. Specifically, the downstream lateral portion 30C extends towards the water vapor outlet 83. However, the direction of extension of the downstream lateral portion 30C is not limited to... Figure 17 The specific example shown is that the downstream lateral portion 30C can also be a drainage modification component that allows adjustment of the position and direction of the drain outlet 32 ​​by changing its orientation.

[0122] [Characteristic 13] According to variation example 3, such as Figure 21 As shown, the drain pipe 30 has a drain hole 34 on the lower surface of its downstream transverse portion 30C, located upstream of the drain outlet 32. In this case, at least a portion of the water guided to the downstream transverse portion 30C is discharged from the drain hole 34, thus effectively preventing water from remaining in the downstream transverse portion 30C of the drain pipe 30. Furthermore, it also prevents water from freezing in the downstream transverse portion 30C.

[0123] according to Figure 21 In the specific example shown, the drain hole 34 is formed in the downstream transverse portion 30C, directly below the downward portion 30B. However, the location of the drain hole 34 is not limited to... Figure 21 The specific examples shown are as follows.

[0124] [Characteristic 14] Below, refer to Figure 22 The features of the construction machinery 100 according to Modification 4 of this embodiment will be described below. The construction machinery 100 according to Modification 4 has the features 1 to 13 described above, and also has the 14th feature described below. Figure 22 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Variation Example 4.

[0125] Modification 4 of the engineering machinery 100 further includes a pipe 95 for water vapor discharged from the water vapor outlet 83 of the drainage receiver 80 to flow into. According to this modification 4, by changing the length, shape, and direction of the pipe 95, the discharge position (relative position) of the water vapor relative to the machine frame 20 can be changed. Thus, even if there are components near the drainage receiver 80 that are prone to rusting due to contact with water vapor, the pipe 95 can guide the water vapor discharged from the water vapor outlet 83 of the drainage receiver 80 away from the easily rusting components and discharge it outside the pipe 95 from that location. Accordingly, it is possible to prevent water vapor from contacting easily rusting components and condensing, thereby preventing water droplets from adhering to those components.

[0126] Specifically, for example, such as Figure 22 As shown, the conduit 95 can be configured to guide water vapor to the vicinity of the outer edge 20E of the body frame 20, or it can be configured to guide water vapor to a location further outward than the outer edge 20E. A conduit outlet 96 for discharging water vapor is formed at the distal end of the conduit 95.

[0127] [Characteristic 15] Below, refer to Figure 23 The features of the construction machinery 100 according to Modification 5 of this embodiment will be described below. The construction machinery 100 according to Modification 5 has the features 1 to 11 described above, and also has the features 15 and 16 described below. Figure 23 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Variation Example 5.

[0128] Modification 5 involves an engineering machine 100 that further includes a water level sensor 91 and a controller 90. The water level sensor 91 detects the water level in the drainage receiver 80, and the controller 90 controls the machine based on the detection result input from the water level sensor 91 to notify relevant personnel of the water level information. In this case, operators and other relevant personnel can obtain information about the water level in the drainage receiver 80.

[0129] Specifically, for example, the construction machinery 100 also includes a display 92, and the controller 90 controls the operation of the display 92 based on the detection results input from the water level sensor 91, so that the display 92 displays information about the water level. The display 92 may be configured, for example, inside the cab 11. Alternatively, the display 92 may be a portable information device that can be carried to a location away from the construction machinery 100, or it may be an information device configured at a location away from the construction machinery 100.

[0130] [Characteristic 16] Modification 5 involves an engineering machine 100 that further includes a water level sensor 91 and a controller 90. The water level sensor 91 detects the water level in the drainage receiver 80, and the controller 90 controls the timing of draining water accumulated in the drainage receiver 80 based on the detection result input from the water level sensor 91. In this case, even if operators or other relevant personnel do not perform the operation of draining the water accumulated in the drainage receiver 80, the water accumulated in the drainage receiver 80 will be drained from the drainage receiver 80 at an appropriate time.

[0131] Specifically, for example, such as Figure 23 As shown, the drain receiver 80 can be configured to open or close the receiver drain outlet 82 via a switching member 93. In this case, the operation of the switching member 93 is controlled according to a command output from the controller 90. Accordingly, for example in a work site where water discharge is restricted, by setting the receiver drain outlet 82 to the closed state, water can be prevented from being discharged into the work site. When the water level in the drain receiver 80 rises, the receiver drain outlet 82 can be switched to the open state at a place where drainage is possible, thereby allowing water to be discharged or recovered before the drain receiver 80 overflows.

[0132] [Characteristic 17] Below, refer to Figure 24 The features of the construction machinery 100 according to Modification 6 of this embodiment will be described below. The construction machinery 100 according to Modification 6 has the features 1 to 10 described above, and also has the 17th feature described below. Figure 24 This is a diagram used to illustrate the features of the engineering machinery 100 involved in Variation Example 6.

[0133] According to the engineering machinery 100 of Modification 6, the drain receiver 80 is disposed at a midway position of the drain pipe 30. Specifically, for example, the drain pipe 30 includes an upstream portion 30D extending from the device drain outlet 43 to the drain receiver 80 and a first downstream portion 30E extending from the drain receiver 80 to the pipe drain outlet 32. The drain receiver 80 is disposed above the frame body 21 of the machine frame 20 and is configured to receive water guided by the upstream portion 30D. In addition, the drain pipe 30 may also include a second downstream portion 30F extending from the drain receiver 80 to the water vapor outlet 33.

[0134] according to Figure 24 In the specific example shown, the first downstream portion 30E is configured to extend downward from the drain receiver 80, and the second downstream portion 30F is configured to extend laterally from the drain receiver 80. Liquid water in the drain receiver 80 is discharged downward from the drain outlet 32 ​​of the first downstream portion 30E, and gaseous water (water vapor) in the drain receiver 80 is discharged laterally from the water vapor outlet 33 of the second downstream portion 30F.

[0135] According to this modified example 6, the drainage receiver 80 is positioned above the frame body 21 of the body frame 20, that is, in the machine room 14, so it is not easy to interfere with the components located below the body frame 20.

[0136] Below, refer to Figures 25 to 34 Features 18 to 24 of this embodiment will be described. Furthermore, the construction machinery 100 may have only one of features 18 to 24, or it may have multiple features 18 to 24.

[0137] [Characteristic 18] like Figure 25 and Figure 26 As shown, the construction machinery 100 includes a lower traveling body 1, an upper slewing body 2, and a swivel joint 200 disposed on the slewing shaft Z. The swivel joint 200 has a guide path 204 for receiving water guided by the drain pipe 30 and guiding the water downward. In this case, the water guided by the drain pipe 30 is guided downward through the guide path 204 of the swivel joint 200 disposed on the slewing shaft Z, thereby reducing the frequency of pollution and corrosion problems caused by water splashing onto the tracked traveling device, vehicle body, and other structures of the lower traveling body 1.

[0138] The lower traveling body 1 includes a vehicle body 1A and a pair of left and right tracked traveling devices, which are arranged on the left and right sides of the vehicle body 1A and support the vehicle body 1A. The vehicle body 1A has a slewing bearing 1B arranged around the slewing axis Z. Each tracked traveling device has a track frame 1C extending forward and backward, a track 1D containing multiple track plates, and a traveling motor 1E for driving the track 1D to rotate.

[0139] The upper rotating body 2 has a body frame 20 supported by a slewing bearing 1B on the lower traveling body 1, the slewing bearing 1B having an insertion port at its center. A rotary joint 200 is a joint located at the rotation center of the upper rotating body 2, used to connect multiple upper hydraulic pipes (omitted in the figure) connected to the hydraulic equipment of the upper rotating body 2 and multiple lower hydraulic pipes (omitted in the figure) connected to the traveling motor of the lower traveling body 1. The rotary joint 200 has a lower connecting portion 200A fixed to the body 1A of the lower traveling body 1 and an upper connecting portion 200B supported on the lower connecting portion 200A in a freely rotatable manner, the upper connecting portion 200B protruding above the body frame 20 through the insertion port.

[0140] like Figure 26 As shown, the lower connecting portion 200A is fixed to the vehicle body 1A. For the lower connecting portion 200A, multiple lower hydraulic pipes (omitted in the figure) extending from the hydraulic motor (travel motor) are connected to a lower connecting port (omitted in the figure) formed in the lower connecting portion 200A. The upper connecting portion 200B is fixed to the body frame 20. For the upper connecting portion 200B, multiple upper hydraulic pipes (omitted in the figure) extending from the hydraulic equipment assembly are connected to an upper connecting port 203 formed in the upper connecting portion 200B.

[0141] Multiple oil passages are formed inside the rotary joint 200 so that even when the upper connecting part 200B rotates relative to the lower connecting part 200A, the corresponding upper connecting port 203 and the lower connecting port are always kept in a connected state.

[0142] According to this design, the rotary joint 200 also has the aforementioned guide path 204. The guide path 204 can, for example, be a through-hole extending vertically through the main body of the rotary joint 200. Figure 25 In the specific example shown, the guide path 204 is formed at the center of the rotary joint 200 along the rotation axis Z. However, it can also be formed at a position offset horizontally relative to the center of the rotary joint 200, or at a position offset horizontally relative to the rotation axis Z. A portion 30G of the drain pipe 30 is connected to the upper end of the guide path 204, and the remaining portion 30H of the drain pipe is connected to the lower end of the guide path 204.

[0143] according to Figure 25For a specific example, the construction machinery 100 also includes a drain receiver 80 located between the fuel cell unit 42 and the rotary joint 200. This drain receiver 80 is used to receive water guided by the upstream portion (omitted in the figure) of the drain pipe 30. In this case, the water discharged from the fuel cell unit 42 flows in the following order: fuel cell unit 42, upstream portion of drain pipe 30, drain receiver 80, a portion 30G of drain pipe 30 (the middle portion 30G of drain pipe 30), rotary joint 200, and the remaining portion 30H of drain pipe 30 (the downstream portion 30H of drain pipe 30).

[0144] Water discharged from the fuel cell unit 42 to the upstream portion of the drain pipe 30 undergoes gas-liquid separation in the drain receiver 80, and water vapor is discharged, for example, rearward from the water vapor outlet 83 of the drain receiver 80. Liquid water, from the drain receiver 80, is guided through the middle portion 30G of the drain pipe 30 to the upper end of the guide path 204 of the rotary joint 200, and then discharged externally from the drain outlet 32 ​​of the downstream portion 30H, passing through the guide path 204 and the downstream portion 30H. Furthermore, according to... Figure 25 In a specific example, the drain receiver 80 can be omitted. In this case, the upstream part of the drain pipe 30 can also be connected to the upper end of the guide path 204 of the rotary joint 200.

[0145] [Characteristic 19] like Figure 27 As shown, the construction machinery 100 includes a rotary joint 200 disposed on the rotary shaft Z. The drain pipe 30 has a portion 30H extending downward along the outer surface of the rotary joint 200, and a drain outlet 32 ​​is formed in this portion 30H (for example, at the lower end of this portion 30H). In this case, water guided by the drain pipe 30 is guided downward through the portion 30H of the drain pipe 30 extending downward along the outer surface of the rotary joint 200, and discharged from the drain outlet 32 ​​formed in this portion 30H. This reduces the frequency of pollution and corrosion problems caused by water splashing onto structures such as the tracked walking device and the vehicle body 1A.

[0146] [Feature 20] like Figure 28 and Figure 29 As shown, the construction machinery 100 includes a lower traveling body 1 with a vehicle body 1A, an upper rotating body 2, and a lower drainage receiver 88 supported on the vehicle body 1A. This lower drainage receiver 88 is used to receive water guided by a portion 30G of the drain pipe 30. In this configuration, the lower drainage receiver 88 supported on the vehicle body 1A can receive water guided by the drain pipe 30, thus preventing water from splashing onto the vehicle body 1A and surrounding structures. The lower drainage receiver 88 is positioned midway along the drain pipe 30.

[0147] according to Figure 28 and Figure 29 In the specific example shown, the lower drain receiver 88 has a ring shape surrounding the rotation axis Z. In this case, regardless of the rotation angle of the upper rotating body 2 relative to the lower traveling body 1, the lower drain receiver 88 is able to receive water guided by the drain pipe 30.

[0148] according to Figure 28 and Figure 29 For a specific example, the construction machinery 100 also includes a drain receiver 80 located between the fuel cell unit 42 and the lower drain receiver 88, which is used to receive water guided by the upstream portion of the drain pipe 30 (omitted in the figure). In this case, the water discharged from the fuel cell unit 42 flows in the following order: fuel cell unit 42, upstream portion of drain pipe 30, drain receiver 80, a portion 30G of drain pipe 30 (downstream portion 30G of drain pipe 30), and lower drain receiver 88.

[0149] Water discharged from the fuel cell unit 42 to the upstream portion of the drain pipe 30 undergoes gas-liquid separation in the drain receiver 80, and water vapor is discharged, for example, rearward from the water vapor outlet 83 of the drain receiver 80. Liquid water, on the other hand, is guided from the drain receiver 80 through the downstream portion 30G of the drain pipe 30 to the lower drain receiver 88. Furthermore, according to... Figure 28 and Figure 29 In a specific example, the drain receiver 80 can be omitted. In this case, the upstream part of the drain pipe 30 can also be connected to the lower drain receiver 88.

[0150] [Feature 21] The lower drain receiver 88 of the construction machinery 100 has a lower storage section 86 that serves as a storage section for accumulating water and a lower receiver drain outlet 87 that allows the water accumulated in the lower storage section 86 to be discharged. The lower storage section 86 occupies most of the lower drain receiver 88 and, for example, has a ring shape. According to this design, water can be temporarily accumulated in the lower storage section 86, and the accumulated water can be discharged from the lower receiver drain outlet 87.

[0151] Furthermore, the construction machinery 100 may also include a water level sensor 91 and a controller 90, wherein the water level sensor 91 is used to detect the water level in the lower receiver drain outlet 87. In this case, the controller 90 can control the operation based on the detection result input from the water level sensor 91 to notify relevant personnel of the water level information. Additionally, the controller 90 can also control the timing of discharging water accumulated in the lower drain receiver 88 from the lower storage section 86 based on the detection result input from the water level sensor 91 (e.g., the timing of opening or closing the lower receiver drain outlet 87).

[0152] [Feature 22] like Figure 30 As shown, the construction machinery 100 includes a lower traveling body 1, an upper rotating body 2, and a water vapor outlet 83 for discharging water vapor contained in water guided by a drain pipe 30. The upper rotating body 2 has an outer wall 13 for defining a machine chamber 14. An exhaust port 17 for discharging air from inside the machine chamber 14 is formed on the outer wall 13. The water vapor outlet 83 is configured to discharge water vapor in the direction of air discharge from the exhaust port 17. According to this design, since the water vapor outlet 83 discharges water vapor in the direction of air discharge from the exhaust port 17, the discharged water vapor easily leaves the construction machinery 100. This prevents the discharged water vapor from re-entering the interior of the construction machinery 100.

[0153] according to Figure 30 For example, an exhaust port 17 and a water vapor exhaust port 83 are formed on the left side of the right side, left side, rear side, and front side of the construction machinery 100. Furthermore, according to... Figure 30 A specific example is the heat exchanger installed inside the machine room 14. For instance... Figure 2 Similarly, in the illustrated scheme, the heat exchanger may include at least one of an oil cooler 72 and a radiator 73. The temperature of the air discharged from the exhaust port 17 is higher than the outside temperature. In this case, by mixing the water vapor discharged from the water vapor outlet 83 with the high-temperature air discharged from the exhaust port 17, condensation of water vapor is suppressed, thereby reducing the frequency of poor visibility caused by water vapor condensation, for example, in winter.

[0154] according to Figure 30For a specific example, a water vapor outlet 83 is formed at the end of the downstream portion 30G, which is part of the drain pipe 30. Furthermore, the engineering machinery 100 also includes a drain receiver 80 located between the fuel cell unit 42 and the downstream portion 30G of the drain pipe 30, which receives water guided by the upstream portion (omitted in the figure) of the drain pipe 30. In this case, the water discharged from the fuel cell unit 42 flows in the order of fuel cell unit 42, upstream portion of the drain pipe 30, drain receiver 80, and downstream portion 30G of the drain pipe 30.

[0155] Water discharged from the fuel cell unit 42 to the upstream portion of the drain pipe 30 undergoes gas-liquid separation in the drain receiver 80, and the liquid water is discharged to the outside from the receiver drain port 82 of the drain receiver 80. Water vapor, after passing through the downstream portion 30G of the drain pipe 30 from the drain receiver 80, is discharged to the outside from the water vapor outlet 83. Furthermore, according to... Figure 30 In a specific example, the drain receiver 80 can be omitted. In this case, the upstream portion of the drain pipe 30 can also be connected to the downstream portion 30G of the drain pipe 30.

[0156] [Feature 23] like Figure 31 As shown, the construction machinery 100 includes a lower traveling body 1, an upper rotating body 2, and a water vapor outlet 83 for discharging water vapor contained in water guided by a drain pipe 30. The upper rotating body 2 has an outer wall 13 for defining a machine room 14. An air inlet 16 is formed on the outer wall 13 for drawing air from outside the machine room 14 into its interior. A louver 89, as an example of a guide plate, is disposed at the water vapor outlet 83. This louver 89 guides the water vapor so that the direction of water vapor discharged from the water vapor outlet 83 is opposite to the direction of exiting the air inlet 16. According to this design, the water vapor discharged from the water vapor outlet 83 is guided by the louver 89 in the direction of exiting the air inlet 16, thus preventing the discharged water vapor from re-entering the machine room 14 through the air inlet 16.

[0157] according to Figure 31 In the specific example shown, the air inlet 16 is formed on the right side of the outer wall 13, and the water vapor discharged from the water vapor outlet 83 is discharged in a direction, for example, diagonally to the left and rear. The water vapor outlet 83 is formed in the drain receiver 80. The drain receiver 80 has a receiver drain port (not shown in the figure) for discharging water (liquid water) inside the drain receiver 80.

[0158] [Feature 24] like Figures 32 to 34As shown, the construction machinery 100 includes a lower traveling body 1, an upper rotating body 2, and a water vapor outlet 99 for discharging water vapor contained in water guided by a drain pipe 30. The upper rotating body 2 has an outer wall 13 for defining a machine chamber 14. An air inlet 16 is formed on the outer wall 13 for drawing air from outside the machine chamber 14 into its interior. The water vapor outlet 99 and the air inlet 16 are positioned such that the machine chamber 14 is located between the water vapor outlet 99 and the air inlet 16. Figures 32 to 34 In the schemes shown, the steam outlet 99 and the air inlet 16 are formed at a position that places the machine chamber 14 between the steam outlet 99 and the air inlet 16. Therefore, it is possible to prevent the steam discharged from the steam outlet 99 from re-entering the machine chamber 14 through the air inlet 16.

[0159] according to Figure 32 In the specific example shown, the air inlet 16 is formed on the right side of the outer wall 13, and the water vapor outlet 99 is formed on the duct 98 located on the left side of the machine room 14. According to... Figure 33 In the specific example shown, the air inlet 16 is formed on the front side of the outer wall 13, and the water vapor outlet 99 is formed on the duct 98 located on the rear side of the machine room 14. According to... Figure 34 In the specific example shown, the air inlet 16 is formed on the upper part of the front side of the outer wall 13, and the water vapor outlet 99 is formed on the pipe 98 located below the rear side of the machine room 14.

[0160] [Other variations] As described above, embodiments of the present disclosure have been explained, but the present disclosure is not limited to the above embodiments and includes, for example, the following variations.

[0161] (A) such as Figures 1 to 22 The engineering machinery 100 shown has features 1 to 6 respectively, but it is sufficient to have at least feature 1, while it may not have at least one of features 2 to 6. For example... Figures 6 to 24 The engineering machinery 100 involved in the variations 1 to 6 shown respectively has features 7 to 10, but it is sufficient to have at least feature 7, and may not have at least one of features 8 to 10. Figures 6 to 23 The engineering machinery 100 involved in the variations 1 to 5 shown each has the 11th feature, but it may also not have the 11th feature. For example... Figures 16 to 21 The modified example 3 involves an engineering machinery 100 that has features 12 and 13, but it is sufficient to have at least feature 12, and it may or may not have feature 13. For example... Figure 23 The engineering machinery 100 involved in the modified example 5 shown may also have only one of the features 15 and 16.

[0162] (B) Regarding drain pipes According to the above embodiment, the drain pipe 30 passes through the opening 24 formed in the body frame 20, and the drain outlet 32 ​​is located below the opening 24. Water in the drain pipe 30 is discharged from the drain outlet 32 ​​to a location below the body frame 20 (outside the construction machinery 100). However, the drain pipe 30 may also pass through an opening (omitted in the figure) formed in the outer wall 13, and the drain outlet 32 ​​is located outside the outer wall 13. Water in the drain pipe 30 is discharged from the drain outlet 32 ​​to the outside of the outer wall 13 (outside the construction machinery 100). In this case, the opening may also be formed on the side (right side, left side, front side, or rear side) of the outer wall 13.

[0163] (C) Regarding the drain outlet According to the above embodiment, the pipe drain outlet 32 ​​is located below the device drain outlet 43, but it may also be located at the same height as the device drain outlet 43. Furthermore, according to the above embodiment, the pipe drain outlet 32 ​​is formed at the lower end of the downward portion 30B of the drain pipe 30, but it is not necessarily required to be formed at the lower end of the drain pipe 30. Moreover, the drain pipe 30 may have only one pipe drain outlet, or it may have multiple pipe drain outlets. Multiple pipe drain outlets may, for example, be formed at intervals along the long side of the drain pipe 30.

[0164] (D) Regarding fuel cell devices According to the above embodiment, the fuel cell device 42 is disposed on the body frame 20 and thus supported by the body frame 20. However, it may also be supported by the outer wall 13 supported by the body frame 20, for example. In this case, the fuel cell device 42 may also be supported by the outer wall 13 by a device support member (not shown in the figure) fixed to the outer wall 13.

[0165] (E) Regarding the drain receiver The drain receiver 80 can also be a container with a lower wall 80B and side walls 80C but no upper wall (a container with an open top). In this case, the drain receiver 80 has a storage function, a splash suppression function, and a protection function. Alternatively, the drain receiver 80 can also be a simple plate-like member, for example, formed by a lower wall. In this case, the drain receiver 80 is positioned to cover the drain outlet 32 ​​of the drain pipe 30 from below, thereby having at least one of the splash suppression and protection functions.

[0166] (F) Regarding rotary joints The rotary joint disclosed herein aims to address the problem of reducing the frequency of contamination and corrosion caused by water discharged from a fuel cell unit splashing onto structures such as tracked vehicles. The rotary joint has a guide path for receiving water guided by a drain pipe connected to the drain outlet of the fuel cell unit and guiding the water downwards. According to this rotary joint, water guided by the drain pipe is guided downwards through the guide path of the rotary joint configured on a rotating shaft, thereby reducing the frequency of contamination and corrosion caused by water splashing onto structures such as tracked vehicles.

[0167] As described above, according to this disclosure, an engineering machine is provided that prevents water from easily remaining in a drain pipe used to discharge water from a fuel cell device to the outside of the engineering machine.

[0168] The engineering machinery involved in the first scheme includes: a fuel cell device with a device drain outlet; and a drain pipe connected to the device drain outlet, wherein the drain pipe is configured at a position lower than or equal to the height of the device drain outlet.

[0169] According to the engineering machinery involved in the first scheme, the drain pipe connected to the device drain port of the fuel cell device is configured at a position lower than or equal to the height of the device drain port. Therefore, compared with the drain pipe being configured upward toward the upper part of the machine body, the water discharged from the fuel cell device is less likely to remain in the drain pipe.

[0170] Preferably, the second embodiment further includes the following configuration based on the engineering machinery involved in the first embodiment. Specifically, the engineering machinery involved in the second embodiment preferably has a drain pipe with a drain outlet located below the device's drain outlet. In this case, water in the drain pipe is more easily discharged from the drain outlet, thus reducing the likelihood of water remaining in the drain pipe.

[0171] Preferably, the third embodiment further includes the following configuration based on the engineering machinery involved in the second embodiment. Specifically, the engineering machinery involved in the third embodiment preferably has the drain outlet formed at the lowest part of the drain pipe. In this case, water in the drain pipe flows towards the lowest part of the drain pipe and is smoothly discharged from the drain outlet formed at the lowest part.

[0172] Preferably, the fourth embodiment further includes the following configuration based on the engineering machinery involved in the second or third embodiment. That is, the engineering machinery involved in the fourth embodiment preferably includes a body frame located below the fuel cell device, the drain pipe extending into an opening formed in the body frame, and the drain outlet disposed in the opening, or disposed below the opening. In this case, water in the drain pipe can be discharged from the drain outlet disposed in the opening of the body frame or from the drain outlet disposed below the opening of the body frame to a location below the body frame.

[0173] Preferably, the fifth embodiment further includes the following configuration based on the engineering machinery involved in the fourth embodiment. Specifically, the engineering machinery involved in the fifth embodiment preferably comprises: a frame containing structural and non-structural components, with the opening formed in the non-structural component or between the structural and non-structural components. In this case, water in the drain pipe can be discharged from the drain outlet to a location lower than the opening in the frame without needing to form an opening in the structural component of the frame.

[0174] Preferably, the sixth embodiment further includes the following configuration based on the engineering machinery involved in the fifth embodiment. Specifically, the engineering machinery involved in the sixth embodiment preferably has a downward portion where the drain pipe extends downwards away from the structural member. In this case, while satisfying the constraint that no opening is formed on the structural member of the body frame, and suppressing the increase in the length of the drain pipe, the drain outlet can be positioned at an opening formed in the body frame, or the drain pipe can pass through an opening formed in the body frame, with the drain outlet located below the opening in the body frame. In this case, the drain pipe may also have a transverse portion (upstream transverse portion), which extends laterally between the device drain outlet and the downward portion to avoid the structural member.

[0175] Preferably, the seventh embodiment further includes the following configuration based on the engineering machinery involved in any of the first to sixth embodiments: That is, the engineering machinery involved in the seventh embodiment preferably includes a drainage receiver for receiving water guided by the drainage pipe. In this case, the drainage receiver can be configured at a position to receive water discharged from the drain outlet of the drainage pipe, or it can be configured at a position midway through the drainage pipe.

[0176] Preferably, the eighth embodiment further includes the following configuration based on the engineering machinery involved in the seventh embodiment. Specifically, the engineering machinery involved in the eighth embodiment preferably includes a drainage receiver having: a storage section capable of accumulating water, and a receiver drain outlet capable of draining the water accumulated in the storage section. According to this eighth embodiment, the drainage receiver has a storage function for temporarily accumulating water, and also has a function for draining at least a portion of the water accumulated in the drainage receiver from the receiver drain outlet.

[0177] Preferably, the ninth embodiment further includes the following configuration based on the engineering machinery involved in the eighth embodiment. That is, the engineering machinery involved in the ninth embodiment preferably includes a water vapor outlet for discharging water vapor. According to the ninth embodiment, the drainage receiver is capable of discharging liquid water in the water within the drainage receiver from the receiver drain outlet, while discharging gaseous water (water vapor) from the water vapor outlet.

[0178] Preferably, the tenth embodiment further includes the following configuration based on the engineering machinery involved in the ninth embodiment. Specifically, the engineering machinery involved in the tenth embodiment preferably has the following configuration: the receiver drain outlet is formed at the lower part of the drainage receiver, and the water vapor outlet is formed at the side of the drainage receiver. In this case, the drainage receiver can discharge liquid water from the receiver drain outlet formed at the lower part of the drainage receiver, while discharging gaseous water (water vapor) from the water vapor outlet formed at the side of the drainage receiver.

[0179] Preferably, the 11th embodiment further includes the following configuration in addition to the engineering machinery involved in any of the 7th to 10th embodiments. That is, the engineering machinery involved in the 11th embodiment preferably includes a body frame located below the fuel cell device, and the drainage receiver is disposed below the body frame and configured to receive water discharged from the drain outlet of the pipe. In this case, the drainage receiver is capable of receiving water discharged from the drain pipe below the body frame.

[0180] Preferably, the 12th embodiment further includes the following configuration based on the engineering machinery involved in any of the 7th to 11th embodiments. Specifically, the engineering machinery involved in the 12th embodiment preferably has the following configuration: the drainage receiver is disposed below the body frame, the drainage pipe includes a downstream transverse portion extending laterally between the body frame and the bottom surface of the drainage receiver, and the pipe outlet is formed at the distal end of the downstream transverse portion. In this case, compared to forming the pipe outlet at the lower end of the downwardly extending portion, even if the thickness (vertical dimension) of the drainage receiver is designed to be smaller, it is easier to ensure the distance between the pipe outlet and the inner surface of the drainage receiver. This reduces pressure loss when water is discharged from the drainage pipe, thereby suppressing a decrease in the drainage efficiency of the drainage pipe.

[0181] Preferably, the 13th embodiment further includes the following configuration based on the engineering machinery involved in the 12th embodiment: Specifically, the engineering machinery involved in the 13th embodiment preferably has a drain hole on the lower surface of the downstream transverse portion of the drain pipe, located upstream of the drain outlet. In this case, water retention in the downstream transverse portion of the drain pipe can be effectively prevented.

[0182] Preferably, the 14th embodiment further includes the following configuration based on the engineering machinery involved in any of the 9th to 13th embodiments: That is, the engineering machinery involved in the 14th embodiment may also include a pipe for the inflow of water vapor discharged from the water vapor outlet. According to this 14th embodiment, by changing the length, shape, and direction of the pipe, the discharge position (relative position) of the water vapor relative to the machine frame can be changed.

[0183] Preferably, the 15th embodiment further includes the following components in addition to the engineering machinery involved in any of the 7th to 14th embodiments. Specifically, the engineering machinery involved in the 15th embodiment preferably further includes: a water level sensor for detecting the water level in the drainage receiver; and a controller, wherein the controller controls the operation based on the detection result input from the water level sensor to notify relevant personnel of the water level information. In this case, operators and other relevant personnel can obtain information about the water level in the drainage receiver.

[0184] Preferably, the 16th embodiment further includes the following configuration based on the engineering machinery involved in any of the 7th to 15th embodiments. Specifically, the engineering machinery involved in the 16th embodiment preferably further includes: a water level sensor for detecting the water level in the drainage receiver; and a controller, wherein the controller controls the timing of discharging water accumulated in the drainage receiver based on the detection result input from the water level sensor. In this case, even if operators or other relevant personnel do not perform the operation of discharging the water accumulated in the drainage receiver, the water accumulated in the drainage receiver will be discharged from the drainage receiver at an appropriate time.

[0185] The 17th embodiment, based on the engineering machinery involved in any of the 7th to 10th embodiments, may further include the following configuration. That is, the engineering machinery involved in the 17th embodiment may also be: the drain pipe includes an upstream portion extending from the device drain outlet to the drain receiver and a downstream portion extending from the drain receiver to the pipe drain outlet, the drain receiver being disposed above the body frame and configured to receive water guided by the upstream portion.

[0186] The 18th embodiment, based on the engineering machinery involved in any of the 1st to 17th embodiments, may further include the following configuration: The engineering machinery involved in the 18th embodiment may further include: a lower traveling body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating shaft; and a rotary joint disposed on the rotating shaft, wherein the rotary joint has a guide path for receiving water guided by the drain pipe and guiding the water downwards. According to this 18th embodiment, the water guided by the drain pipe is guided downwards through the guide path of the rotary joint disposed on the rotating shaft, thereby reducing the frequency of pollution and corrosion problems caused by water splashing onto structures such as tracked traveling devices.

[0187] The 19th embodiment, based on the engineering machinery involved in any of the 1st to 17th embodiments, may further include the following configuration: The engineering machinery involved in the 19th embodiment may further include: a lower traveling body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating shaft; and a rotary joint disposed on the rotating shaft, wherein the drain pipe has a portion extending downward along the outer surface of the rotary joint, and a drain outlet is formed in this portion. According to this 19th embodiment, water guided by the drain pipe is guided downward through a portion of the drain pipe extending downward along the outer surface of the rotary joint disposed on the rotating shaft, and discharged from the drain outlet formed in this portion, thereby reducing the frequency of pollution, corrosion, and other problems caused by water splashing onto structures such as tracked traveling devices.

[0188] The 20th embodiment, based on the engineering machinery involved in any of the 1st to 19th embodiments, may further include the following configuration: The engineering machinery involved in the 20th embodiment may further include: a lower traveling body having a vehicle body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating axis; and a lower drainage receiver supported on the vehicle body and used to receive water guided by the drainage pipe. In this 20th embodiment, the lower drainage receiver supported on the vehicle body of the lower traveling body can receive water guided by the drainage pipe, thus preventing water from splashing onto the vehicle body and surrounding structures. In the 20th embodiment, the lower drainage receiver may be configured at a position to receive water discharged from the drain outlet of the drainage pipe, or it may be configured at a position midway along the drainage pipe. Furthermore, in the 20th embodiment, it is preferred that the lower drainage receiver has a shape (e.g., a ring shape) surrounding the rotating axis. In this case, regardless of the rotation angle of the upper rotating body relative to the lower traveling body, the lower drainage receiver can receive the water guided by the drainage pipe.

[0189] Preferably, the 21st embodiment further includes the following configuration based on the construction machinery involved in the 20th embodiment. Specifically, the construction machinery involved in the 21st embodiment preferably includes a lower drainage receiver comprising: a lower storage section capable of accumulating water, and a lower receiver drain outlet capable of draining the water accumulated in the lower storage section. According to this 21st embodiment, water can be temporarily accumulated in the lower storage section, and the accumulated water can be discharged through the lower receiver drain outlet. According to the 21st embodiment, the construction machinery may also include a water level sensor and a controller for detecting the water level in the lower receiver drain outlet. In this case, the controller can also control the operation based on the detection result input from the water level sensor to notify relevant personnel of water level information. Furthermore, the controller can also control the timing of draining the water accumulated in the lower drainage receiver based on the detection result input from the water level sensor.

[0190] The 22nd embodiment, based on the engineering machinery involved in any of the 1st to 21st embodiments, may further include the following configuration: The engineering machinery involved in the 22nd embodiment may further include: a lower traveling body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating axis; and a water vapor outlet for discharging water vapor contained in water guided by the drain pipe, wherein the upper rotating body includes an outer wall defining a machine chamber, on which an exhaust port for discharging air from the interior of the machine chamber is formed, and the water vapor outlet is configured to discharge water vapor in a direction along the discharge direction of the air discharged from the exhaust port. According to this 22nd embodiment, since the water vapor outlet discharges water vapor in a direction along the discharge direction of the air discharged from the exhaust port, the discharged water vapor easily leaves the engineering machinery. This prevents the discharged water vapor from re-entering the interior of the engineering machinery. The 22nd embodiment preferably involves forming the exhaust port and the water vapor outlet on any one of the right, left, rear, and front sides of the construction machinery. Furthermore, according to the 22nd embodiment, when a heat exchanger is installed inside the machine room, the temperature of the air discharged from the exhaust port is higher than the outside temperature. In this case, by mixing the water vapor discharged from the water vapor outlet with the high-temperature air discharged from the exhaust port, condensation is suppressed, thereby reducing the frequency of poor visibility caused by water vapor condensation, for example, in winter.

[0191] The 23rd embodiment, based on the engineering machinery involved in any of the 1st to 22nd embodiments, may further include the following configuration: The engineering machinery involved in the 23rd embodiment may further include: a lower traveling body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating axis; and a water vapor outlet for discharging water vapor contained in water guided by the drain pipe, wherein the upper rotating body includes an outer wall defining a machine chamber, on which an air inlet is formed for drawing air from outside the machine chamber into the interior of the machine chamber, and a guide plate is disposed at the water vapor outlet, the guide plate guiding the water vapor so that the discharge direction of the water vapor discharged from the water vapor outlet is the direction away from the air inlet. According to this 23rd embodiment, the water vapor discharged from the water vapor outlet is guided away from the air inlet by the guide plate, thus preventing the discharged water vapor from re-entering the machine chamber through the air inlet.

[0192] The 24th embodiment, based on the engineering machinery involved in any of the 1st to 23rd embodiments, may further include the following configuration: The engineering machinery involved in the 24th embodiment may further include: a lower traveling body; an upper rotating body supported on the lower traveling body in a manner capable of rotating relative to the lower traveling body about a vertically extending rotating axis; and a water vapor outlet for discharging water vapor contained in water guided by the drain pipe, wherein the upper rotating body includes an outer wall defining a machine chamber, on which an air inlet is formed for drawing air from outside the machine chamber into the interior of the machine chamber, and the water vapor outlet and the air inlet are formed at a position such that the machine chamber is located between the water vapor outlet and the air inlet. According to this 24th embodiment, since the water vapor outlet and the air inlet are formed at a position such that the machine chamber is located between the water vapor outlet and the air inlet, it is possible to prevent water vapor discharged from the water vapor outlet from re-entering the machine chamber through the air inlet.

Claims

1. An engineering machinery, characterized in that... include: A fuel cell device with a drainage outlet; as well as The drain pipe connected to the drain outlet of the device, wherein, The drain pipe is positioned at a height lower than or equal to the drain outlet of the device.

2. The engineering machinery according to claim 1, characterized in that, The drain pipe has a drain outlet, which is located below the drain outlet of the device.

3. The engineering machinery according to claim 2, characterized in that, The drain outlet is located at the bottom of the drain pipe.

4. The engineering machinery according to claim 2 or 3, characterized in that... Also includes: The body frame located below the fuel cell device, wherein, The drain pipe extends into an opening formed in the body frame, and the drain outlet of the pipe is disposed in the opening or disposed below the opening.

5. The engineering machinery according to claim 4, characterized in that, The body frame includes structural components and non-structural components. The opening is formed in the non-structural member, or between the structural member and the non-structural member.

6. The engineering machinery according to claim 5, characterized in that, The drain pipe has a downward portion that extends downward in a position that avoids the structural member.

7. The engineering machinery according to any one of claims 1 to 6, characterized in that... Also includes: A drain receiver for receiving water guided by the drain pipe.

8. The engineering machinery according to claim 7, characterized in that, The drainage receiver has: a storage section capable of accumulating water, and a receiver drain outlet capable of discharging the water accumulated in the storage section.

9. The engineering machinery according to claim 8, characterized in that, The drainage receiver also has a water vapor outlet for discharging water vapor.

10. The engineering machinery according to claim 9, characterized in that, The receiver drain outlet is formed at the lower part of the drain receiver, and the water vapor outlet is formed at the side of the drain receiver.

11. The engineering machinery according to any one of claims 7 to 10, characterized in that... Also includes: The body frame located below the fuel cell device, wherein, The drain receiver is disposed below the body frame and is configured to receive water discharged from the drain outlet of the pipe.

12. The engineering machinery according to any one of claims 7 to 11, characterized in that... Also includes: The body frame located below the fuel cell device, wherein, The drainage receiver is located below the body frame. The drain pipe includes a downstream lateral portion that extends laterally between the bottom surface of the body frame and the drain receiver. The drain outlet is formed at the distal end of the transverse portion on the downstream side.

13. The engineering machinery according to claim 12, characterized in that, The drain pipe has a drain hole on the lower surface of the downstream transverse portion, at a location upstream of the drain outlet.

14. The engineering machinery according to claim 9 or 10, characterized in that... Also includes: A pipe for the inflow of water vapor discharged from the water vapor outlet.

15. The engineering machinery according to any one of claims 7 to 14, characterized in that... Also includes: A water level sensor used to detect the water level in the drainage receiver; as well as Controller, where The controller operates based on the detection results input from the water level sensor to notify relevant personnel of water level information.

16. The engineering machinery according to any one of claims 7 to 15, characterized in that... Also includes: A water level sensor used to detect the water level in the drainage receiver; as well as Controller, where The controller controls the timing of discharging water accumulated in the drain receiver based on the detection result input from the water level sensor.

17. The engineering machinery according to any one of claims 7 to 10, characterized in that... Also includes: The body frame located below the fuel cell device, wherein, The drain pipe includes: an upstream portion extending from the drain outlet of the device to the drain receiver; and a downstream portion extending from the drain receiver to the drain outlet of the pipe. The drainage receiver is positioned above the body frame and is configured to receive water directed by the upstream portion.

18. The engineering machinery according to any one of claims 1 to 17, characterized in that... Also includes: Lower walking body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as A rotary joint is disposed on the rotary shaft, wherein, The rotary joint has a guide path for receiving water guided by the drain pipe and directing the water downwards.

19. The engineering machinery according to any one of claims 1 to 17, characterized in that... Also includes: Lower walking body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as A rotary joint is disposed on the rotary shaft, wherein, The drain pipe has a portion extending downward along the outer surface of the rotary joint, and a drain outlet is formed in this portion.

20. The engineering machinery according to any one of claims 1 to 19, characterized in that... Also includes: The lower running gear has a vehicle body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as The lower drainage receiver is supported on the vehicle body and is used to receive water guided by the drainage pipe.

21. The engineering machinery according to claim 20, characterized in that, The lower drainage receiver has: a lower storage section that can store water, and a lower receiver drain outlet that can discharge the water stored in the lower storage section.

22. The engineering machinery according to any one of claims 1 to 21, characterized in that... Also includes: Lower walking body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as A water vapor outlet is provided for discharging water vapor contained in the water guided by the drain pipe, wherein... The upper rotating body includes an outer wall for defining the machine room. An exhaust port is formed on the outer wall for discharging air from the interior of the machine room. The water vapor outlet is configured to discharge water vapor in the direction of the air discharged from the outlet.

23. The engineering machinery according to any one of claims 1 to 22, characterized in that... Also includes: Lower walking body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as A water vapor outlet is provided for discharging water vapor contained in the water guided by the drain pipe, wherein... The upper rotating body includes an outer wall for defining the machine room. An air inlet is formed on the outer wall for drawing air from outside the machine room into the interior of the machine room. A guide plate is provided at the steam outlet to guide the steam so that the steam exiting from the steam outlet is in the direction of leaving the air inlet.

24. The engineering machinery according to any one of claims 1 to 23, characterized in that... Also includes: Lower walking body; The upper rotating body is supported on the lower traveling body in such a way that it can rotate relative to the lower traveling body about a rotating axis that extends vertically; as well as A water vapor outlet is provided for discharging water vapor contained in the water guided by the drain pipe, wherein... The upper rotating body includes an outer wall for defining the machine room. An air inlet is formed on the outer wall for drawing air from outside the machine room into the interior of the machine room. The steam outlet and the air inlet are formed at a position that places the machine room between the steam outlet and the air inlet.

Images