Excavator

Abstract

This excavator includes: a rotating body that includes a cabin in which a driver's seat is disposed and that is rotatably provided to a traveling device; a hydrogen tank that disposed in the rotating body; a fuel cell that generates power by consuming hydrogen in the hydrogen tank; and a filling-use receptacle that is provided to the rotating body, that includes a filling port at a distal end, and that is connected to the hydrogen tank. The filling port is disposed, with respect to the rotating body, at a position higher than the bottom surface of the rotating body and lower than a seat surface of the driver's seat.

Description

Excavator

[0001] The present disclosure relates to a shovel equipped with a fuel cell.

[0002] Equipping construction machinery with fuel cells is being considered to achieve carbon neutrality. A known example of an excavator equipped with a fuel cell is the hydraulic excavator described in Patent Document 1. In the hydraulic excavator described in Patent Document 1, the fuel cell generates electricity using hydrogen supplied from a tank and oxygen from the atmosphere. The generated electricity is supplied to an electric pump device. This causes hydraulic oil to be discharged from the electric pump device, and the hydraulic fluid is supplied to hydraulic actuators such as a boom cylinder, thereby operating the hydraulic excavator.

[0003] Patent No. 7149447 specification

[0004] In an excavator that uses a fuel cell to operate an electric pump, such as the hydraulic excavator disclosed in Patent Document 1, hydrogen is thought to be filled into the hydrogen tank via a filling receptacle (not shown). In the case of a conventional hydraulic excavator equipped with a diesel engine, since diesel fuel is a liquid, a fuel filler port corresponding to the filling port of the filling receptacle is provided on the upper surface of the rotating body. Therefore, when referring to the fuel filler port of a conventional hydraulic excavator equipped with a diesel engine, the filling receptacle is thought to be provided on the upper surface of the rotating body. In this case, the fuel filler must ascend and descend while holding the fuel filler nozzle on the upper surface of the rotating body. On the other hand, hydraulic excavators equipped with fuel cells are expected to be filled more frequently than conventional hydraulic excavators, and there is a demand for more efficient filling operations.

[0005] Therefore, the first and second disclosures aim to provide a shovel that can improve the efficiency of filling work.

[0006] The excavator of the first disclosure comprises a rotating body including a cabin in which the driver's seat is located and which is rotatably mounted on a traveling device, a hydrogen tank disposed within the rotating body, a fuel cell which consumes hydrogen in the hydrogen tank to generate electricity, and a filling receptacle disposed on the rotating body, which includes a filling port at its tip and is connected to the hydrogen tank, the filling port being disposed at a position on the rotating body which is higher than the underside of the rotating body and lower than the seat surface of the driver's seat.

[0007] According to the first disclosure, the filling port of the filling receptacle is positioned higher than the underside of the rotating body and lower than the seat of the driver's seat. Therefore, the filling port can be positioned away from the ground. This prevents dust from the ground from accumulating at the filling port. Furthermore, the seat is located at a height that is convenient for easy access when getting in and out of the vehicle. Since the filling port is positioned higher than the underside of the rotating body and lower than the seat of the driver's seat, access to the filling port can be improved. Therefore, the filling person is prevented from being forced into an extremely poor posture or being subjected to excessive physical strain when filling. This makes the filling operation easier. This improves the efficiency of the filling operation.

[0008] The second disclosed shovel comprises a rotating body that is rotatably mounted on a traveling device, a hydrogen tank placed within the rotating body, a fuel cell that consumes hydrogen in the hydrogen tank to generate electricity, and a filling receptacle that is mounted on the rotating body and connected to the hydrogen tank, the rotating body including an exterior cover that covers the hydrogen tank and an exterior frame that supports the exterior cover, and the filling receptacle attached to the exterior frame.

[0009] According to the second disclosure, the filling receptacle is attached to the exterior frame. Therefore, the filling receptacle can be easily accessed, thereby improving the efficiency of the filling operation. Furthermore, since the filling receptacle is attached to the exterior frame, the filling receptacle can be easily attached to the rotating body.

[0010] According to the first and second disclosures, the efficiency of the filling operation can be improved.

[0011] The above and other objects, features, and advantages of the present disclosure will become apparent from the following detailed description of preferred embodiments, which proceeds with reference to the accompanying drawings.

[0012] FIG. 1 is a perspective view showing a shovel according to a first embodiment of the present disclosure. FIG. 2 is a plan view showing the shovel of FIG. 1. FIG. 3 is a side view of the shovel of FIG. 1. FIG. 4 is a plan view showing a cutaway view of a portion of the shovel of FIG. 2. FIG. 5 is an enlarged side view showing an enlarged view of a portion of the shovel of FIG. 3. FIG. 6 is an enlarged perspective view showing the vicinity of a filling receptacle of the shovel shown in FIG. 3. FIG. 7 is an enlarged sectional view showing the vicinity of a filling receptacle of the shovel shown in FIG. 3. FIG. 8 is an enlarged perspective view showing the vicinity of a filling receptacle of the shovel according to a second embodiment of the present disclosure. FIG. 9 is an enlarged sectional view showing the vicinity of a filling receptacle of the shovel shown in FIG. 8. FIG. 10 is an enlarged perspective view showing a shovel according to a third embodiment of the present disclosure. FIG. 11 is an enlarged side view showing a shovel according to a fourth embodiment of the present disclosure. FIG. 12 is an enlarged side view showing a shovel according to a fifth embodiment of the present disclosure. FIG. 13 is an enlarged side view showing a shovel according to a sixth embodiment of the present disclosure.

[0013] Hereinafter, shovels 1, 1A to 1E according to first to sixth embodiments of the present disclosure will be described with reference to the drawings mentioned above. Note that the concepts of directions used in the following description are used for convenience of explanation and do not limit the orientation of the configuration of the invention to those directions. Furthermore, the shovels 1, 1A to 1E described below are merely one embodiment of the present disclosure. Therefore, the present disclosure is not limited to the embodiments, and additions, deletions, and modifications are possible within the scope of the spirit of the invention.

[0014] First Embodiment [Shovel] The shovel 1 shown in FIG. 1 is an electric shovel that operates using hydrogen as fuel. The shovel 1 is, for example, a medium-sized shovel weighing between 10 tons and 31 tons. The shovel 1 includes a traveling device 11, a revolving body 12, a boom 13, an arm 14, and a bucket 15. The traveling device 11 includes, for example, a pair of crawlers 11L and 11R. Note that the traveling device 11 may include multiple wheels instead of the pair of crawlers 11L and 11R. Each of the crawlers 11L and 11R can be driven to move in various directions. The revolving body 12 is provided on the traveling device 11 so as to be rotatable about a rotation axis L1 extending in the up-down direction, which is an example of a height direction. A boom 13, which is an example of a working machine, is provided on the revolving body 12 so as to be swingable in the up-down direction. The arm 14 is provided at the tip of the boom 13 so as to be swingable in the front-rear direction, which is an example of a first direction. Furthermore, the bucket 15 is provided at the tip of the arm 14 so as to be swingable in the front-rear direction or the up-down direction. The front-rear direction is the direction in which the boom 13 extends.

[0015] The traveling unit 11, the revolving unit 12, the boom 13, the arm 14, and the bucket 15 are each provided with a hydraulic actuator (not shown). More specifically, each of the crawlers 11L, 11R of the traveling unit 11 is provided with a travel motor. The travel motors are supplied with hydraulic fluid to drive the crawlers 11L, 11R. This allows the traveling unit 11 to move in various directions. The hydraulic fluid is, for example, a liquid such as oil. The revolving unit 12 is also provided with a swing motor (not shown). The swing motor swings the revolving unit 12 when hydraulic fluid is supplied to it. The boom 13, the arm 14, and the bucket 15 are each provided with a cylinder (not shown). When hydraulic fluid is supplied to each cylinder, the boom 13, the arm 14, and the bucket 15 swing, respectively.

[0016] The revolving unit 12 is configured as follows. Specifically, as shown in FIGS. 2 and 3 , the revolving unit 12 includes a revolving frame 21, a cabin 22, an exterior frame 23, a first exterior cover 24, and a second exterior cover 25. More specifically, the revolving unit 12 further includes a storage recess 26, a cover member 27, and a sealing member 28 (see FIG. 7 ). The revolving frame 21 is revolvably mounted on the traveling device 11. The revolving frame 21 also serves as a base frame for the revolving unit 12. A boom 13 is mounted on the front side of the revolving frame 21 in a central portion in the vehicle width direction so as to be swingable up and down. The vehicle width direction is a direction perpendicular to the front-rear direction and the up-down direction, and corresponds to the left-right direction in this embodiment. The revolving frame 21 is also provided with various other components, which will be described in detail later.

[0017] The cabin 22 is configured to allow a driver or operator to ride in. More specifically, the cabin 22 is provided with a driver's seat 22a. The driver's seat 22a is configured so that the driver or operator can sit on its seat 22b. For example, in the case of a medium-sized excavator, the seat 22b of the driver's seat 22a is located at a height of 400 mm to 550 mm from the bottom surface of the revolving body 12. In this embodiment, the seat 22b of the driver's seat 22a is located at a height of 550 mm from the bottom surface of the revolving body 12. The bottom surface is the surface of the revolving body 12 that faces the crawlers 11L, 11R of the traveling device 11. In the case of the revolving body 12, if the traveling device includes wheels, the bottom surface is the surface that faces the wheels. The cabin 22 is disposed, for example, at the front of the revolving body 12 on one side in the vehicle width direction, i.e., on the left side in this embodiment. More specifically, the cabin 22 is provided on the revolving frame 21. The cabin 22 is provided in front of the revolving frame 21 and on the left side of the boom 13 .

[0018] The exterior frame 23 supports a first exterior cover 24, which will be described in detail later. The exterior frame 23 is disposed on the rear side of the revolving unit 12. More specifically, the exterior frame 23 is erected on the revolving frame 21 at the rear side of the revolving unit 12. In this embodiment, the exterior frame 23 is a frame body having a substantially rectangular parallelepiped shape. The exterior frame 23 defines a first storage space 12a therein.

[0019] More specifically, the exterior frame 23 has, for example, a plurality of vertical frame portions 23a, horizontal frame portions 23b, and cross frame portions 23c. The plurality of vertical frame portions 23a, which are also an example of side frame portions, are erected on the revolving frame 21. The plurality of vertical frame portions 23a are lined up at intervals in the front-rear direction on both sides in the vehicle width direction. In this embodiment, four vertical frame portions 23a are erected on the revolving frame 21. The four vertical frame portions 23a are arranged at four corners of the exterior frame 23 in a plan view. That is, the four vertical frame portions 23a are arranged two by two on both sides in the vehicle width direction of the revolving frame 21, spaced apart from each other in the front-rear direction.

[0020] The horizontal frame portions 23b are arranged so as to bridge the multiple vertical frame portions 23a on both sides in the vehicle width direction. In this embodiment, a pair of horizontal frame portions 23b are provided. Each of the pair of horizontal frame portions 23b is arranged on both sides in the vehicle width direction within the rotating unit 12. The pair of horizontal frame portions 23b are arranged so as to bridge two vertical frame portions 23a that are spaced apart from each other in the front-to-rear direction.

[0021] The cross frame portions 23c are provided so as to extend in the vehicle width direction. In this embodiment, a pair of cross frame portions 23c are provided. Note that the number of cross frame portions 23c may be three or more. The pair of cross frame portions 23c are arranged spaced apart from each other in the front and rear directions within the revolving unit 12. The pair of cross frame portions 23c are arranged so as to bridge two vertical frame portions 23a that are arranged spaced apart from each other in the vehicle width direction. Note that in this embodiment, a plurality of support frame portions 23d are arranged at intervals in the vehicle width direction on each of the pair of cross frame portions 23c. The support frame portions 23d are erected on the revolving frame 21 and support the pair of cross frame portions 23c.

[0022] The first exterior cover 24 is disposed on the rear side of the rotating unit 12 so as to cover the exterior frame 23. The first exterior cover 24 is supported by the exterior frame 23. As a result, the first housing space 12a inside the exterior frame 23 is covered by the first exterior cover 24. In this embodiment, the first exterior cover 24 is formed in a substantially rectangular parallelepiped shape and is larger than the exterior frame 23.

[0023] The second exterior cover 25 is disposed on the front side of the revolving unit 12. More specifically, the second exterior cover 25 is disposed on the opposite side of the boom 13 from the cabin 22. A second storage space 12b is formed inside the second exterior cover 25.

[0024] The rotating structure 12 also includes a fixed frame 29 shown in FIG. 4 . The fixed frame 29 is provided within the rotating structure 12. More specifically, the fixed frame 29 is provided in the first storage space 12a. As will be described in detail later, a hydrogen tank 31 and an electric pump device 33 are attached to the fixed frame 29. More specifically, as shown in FIG. 5 , the fixed frame 29 is a frame body that is formed, for example, in a U-shape when viewed from the left side and extends in the left-right direction. That is, the fixed frame 29 is disposed in the first storage space 12a with its opening facing upward. The hydrogen tank 31 and the electric pump device 33, which will be described in detail later, are housed within the fixed frame 29. Note that the shape of the fixed frame 29 is not limited to a U-shape when viewed from the left side, and may be an S-shape or a rectangle.

[0025] The storage recess 26 is formed on the side surface of the revolving unit 12. More specifically, the storage recess 26 is formed on the left side surface of the revolving unit 12. In this embodiment, the storage recess 26 is formed on the left side surface of the first exterior cover 24. More specifically, the storage recess 26 is formed in a central portion in the front-to-rear direction on the left side surface of the first exterior cover 24. The storage recess 26 may also be formed on the right side surface of the revolving unit 12, or in this embodiment, the right side surface of the first exterior cover 24. The storage recess 26 is also positioned higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a in the vertical direction. More specifically, the storage recess 26 is positioned higher than the revolving frame 21 in the vertical direction. In this embodiment, the storage recess 26 is positioned lower than the same height H as the seat surface 22b of the driver's seat 22a. Here, the same height does not necessarily have to be the same, and the storage recess 26 may be positioned lower than the seat surface 22b.

[0026] The storage recess 26 arranged in this manner is formed in a rectangular shape when viewed from the left side. Note that the storage recess 26 may be formed in a shape other than a rectangle, such as a circular shape when viewed from the left side. The storage recess 26 is formed so as to be recessed inward from the left side surface of the rotating unit 12. More specifically, the storage recess 26 is formed so as to be recessed inward from the left side surface of the first exterior cover 24. The storage recess 26 is formed so as to have a bottom, and a filling receptacle 3, which will be described in detail later, is accommodated therein.

[0027] The lid member 27 closes the storage recess 26. More specifically, as shown in FIGS. 6 and 7 , the lid member 27 is configured to open and close the storage recess 26. In this embodiment, the lid member 27 opens and closes the storage recess 26 by rotating about a rotation axis L3. The rotation axis L3 is located above the storage recess 26 and extends in a direction intersecting the up-down direction. The rotation axis L3 is, for example, an axis extending in the front-rear direction. In this embodiment, the lid member 27 is attached to the first exterior cover 24 so as to fit into the opening of the storage recess 26 via a hinge (not shown). The lid member 27 rotates about the rotation axis L3 by the hinge. That is, the lid member 27 swings up and down by the hinge. This allows the lid member 27 to open and close the storage recess 26. More specifically, the cover member 27 closes the accommodation recess 26 while hanging down from the upper portion of the open end of the accommodation recess 26, and then rotates from that state around the rotation axis L3 to a maximum angle α. The maximum angle α is, for example, in the range of 45 degrees to 180 degrees, and preferably in the range of 60 degrees to 120 degrees. In this embodiment, the maximum angle α is 90 degrees. When the maximum angle α is in the range of 60 degrees to 120 degrees, the cover member 27 functions as a canopy.

[0028] The sealing member 28 is provided on the lid member 27. Explaining in more detail, the sealing member 28 is disposed at a position corresponding to the filling port 3a of the filling receptacle 3, which will be described in detail later. In this embodiment, the sealing member 28 abuts against the filling port 3a of the filling receptacle 3 when the lid member 27 is closed. The sealing member 28 is provided, for example, on the surface of the lid member 27 facing the filling port 3a, at a position where it abuts against the filling port 3a of the filling receptacle 3 when the lid member 27 is closed. The sealing member 28 is a seal member made of, for example, synthetic rubber, and seals the filling port 3a by abutting against it.

[0029] [Hydraulic Drive System] The excavator 1 includes a hydraulic drive system 2 shown in FIG. 4 and a filling receptacle 3 shown in FIG. 5. The hydraulic drive system 2 supplies hydraulic fluid to each of the hydraulic actuators described above to drive each of the hydraulic actuators. The hydraulic drive system 2 is disposed within the revolving bed 12. The hydraulic drive system 2 includes multiple hydrogen tanks 31 and a fuel cell 32. In this embodiment, the hydraulic drive system 2 includes two hydrogen tanks 31. However, the number of hydrogen tanks 31 included in the hydraulic drive system 2 is not limited to two, and may be three or more, or may be one. The hydraulic drive system 2 also includes an electric pump device 33, a supply system unit 34, and a multi-control valve 35.

[0030] [Hydrogen Tanks] The two hydrogen tanks 31 shown in Figure 5 store hydrogen to be supplied to the fuel cell 32 (see Figure 4). The two hydrogen tanks 31 are connected to the fuel cell 32 via a supply system unit 34, which will be described in detail later. The two hydrogen tanks 31 are connected to the fuel cell 32 via the supply system unit 34. In other words, the two hydrogen tanks 31 supply hydrogen to the fuel cell 32 via the supply system unit 34.

[0031] The two hydrogen tanks 31 configured in this manner are arranged within the rotating structure 12, for example, as follows. That is, each of the hydrogen tanks 31 is accommodated in the first storage space 12a, as shown in FIG. 4 . More specifically, each of the hydrogen tanks 31 is accommodated in a fixed frame 29 in the first storage space 12a. Furthermore, as shown in FIG. 5 , each of the two hydrogen tanks 31 is arranged vertically side by side at the rear of the fixed frame 29. More specifically, each of the two hydrogen tanks 31 has a tank valve 31b that controls the flow of hydrogen discharged therefrom, and the tank valve 31b is arranged so that it is located on the left side. The two hydrogen tanks 31 are attached to the fixed frame 29 and fixed to the rotating structure 12. The tank valve 31b may also be arranged so that it is located on the right side.

[0032] Furthermore, the hydrogen tank 31 is connected to the fuel cell 32, which will be described in detail later, via a supply system unit 34. The supply system unit 34 has a valve group 34b consisting of a plurality of valves. The valve group 34b is connected to a tank valve 31b in the hydrogen tank 31. The tank valve 31b is then connected to the fuel cell 32 via the valve group. The plurality of valves included in the valve group 34b regulate the supply of hydrogen from the hydrogen tank 31 to the fuel cell 32. The plurality of valves include, for example, a high-pressure pressure-reducing valve, a shut-off valve, a low-pressure pressure-reducing valve, and a manual valve. Each valve in the valve group 34b reduces the pressure of high-pressure hydrogen stored in the hydrogen tank 31 to a low pressure (for example, 100 KPa) and supplies it to the fuel cell 32.

[0033] [Fuel Cell] The fuel cell 32 shown in Fig. 2 generates electricity by consuming hydrogen from the hydrogen tank 31. More specifically, the fuel cell 32 generates electricity through a chemical reaction between hydrogen supplied from the hydrogen tank 31 and oxygen taken in from the outside air. The fuel cell 32 is electrically connected to an electric pump device 33, which will be described in detail later, and supplies the generated electricity to the electric pump device 33. This drives the electric pump device 33. The fuel cell 32 may be a single cell, or may have a stack structure in which cells are stacked. The fuel cell 32 is housed in the second housing space 12b, as shown in Fig. 4.

[0034] [Electric Pump Device] The electric pump device 33 shown in FIGS. 4 and 5 is an electrically driven hydraulic pump device. The electric pump device 33 is driven by electric power supplied from the fuel cell 32 and discharges hydraulic fluid. More specifically, the electric pump device 33 includes a hydraulic pump 36 and an electric motor 37. The hydraulic pump 36 discharges hydraulic fluid when driven to rotate. The hydraulic pump 36 is, for example, a tandem swash plate piston pump. Note that the hydraulic pump 36 may be a single swash plate piston pump or another type of hydraulic pump, such as a bent axis pump or a gear pump. The electric motor 37 is connected to the hydraulic pump 36. The electric motor 37 receives electric power to rotate and drive the hydraulic pump 36, thereby discharging hydraulic fluid from the hydraulic pump 36. In this embodiment, the hydraulic pump 36 and the electric motor 37 share a drive shaft (not shown), and the hydraulic pump 36 and the electric motor 37 are arranged in a straight line.

[0035] The electric pump device 33 configured in this manner is disposed within the rotating body 12, for example, as follows. That is, the electric pump device 33 is housed in the first accommodation space 12a. More specifically, the electric pump device 33 is housed within the fixed frame 29 in the first accommodation space 12a. The electric pump device 33 is housed within the fixed frame 29 so as to be parallel to the hydrogen tanks 31, for example. Furthermore, the electric pump device 33 is disposed at a distance from the two hydrogen tanks 31 in the front-to-rear direction.

[0036] The multi-control valve 35 is connected to the electric pump device 33. The multi-control valve 35 is also connected to each hydraulic actuator (not shown). That is, the electric pump device 33 is connected to each hydraulic actuator (not shown) via the multi-control valve 35. The multi-control valve 35 can control the flow of hydraulic fluid discharged from the electric pump device 33 and supply it to each hydraulic actuator. This allows the traveling device 11, the revolving unit 12, the boom 13, the arm 14, and the bucket 15 to be operated.

[0037] [Filling Receptacle] The filling receptacle 3 shown in Figure 6 is connected to a hydrogen tank 31. More specifically, as shown in Figure 7, a filling pipe 3b is connected to the base end of the filling receptacle 3, and the filling receptacle 3 is connected to the hydrogen tank 31 via the filling pipe 3b. The filling receptacle 3 is also configured to allow a dispenser nozzle (not shown) to be attached and detached. The filling receptacle 3 has a filling port 3a at its tip, and hydrogen is supplied from the attached dispenser nozzle to the filling port 3a. The filling receptacle 3 then fills the hydrogen tank 31 with hydrogen via the filling pipe 3b.

[0038] The filling receptacle 3 is provided on the rotating body 12. More specifically, the filling receptacle 3 is provided on the side of the rotating body 12. In this embodiment, the filling receptacle 3 is provided on the left side of the rotating body 12. More specifically, the filling receptacle 3 is provided in the storage recess 26. In this embodiment, the filling receptacle 3 is provided in the bottom portion 26a of the storage recess 26. In this embodiment, the filling receptacle 3 is provided in the bottom portion 26a so as to protrude into the storage recess 26, and the filling port 3a is disposed in the storage recess 26. The filling port 3a faces the left side of the rotating body 12 through the opening of the storage recess 26. Therefore, when the cover member 27 is opened, the filling port 3a is exposed. A dispenser nozzle is thereby attached to the filling port 3a, and hydrogen is filled through the filling port 3a. Furthermore, when the lid member 27 is closed, the filling port 3a abuts against the sealing member 28. More specifically, the sealing member 28 abuts against the entire filling port 3a, sealing the filling port 3a.

[0039] In the filling receptacle 3 arranged in this manner, the filling port 3a is located at a position higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a. In this embodiment, the filling receptacle 3 is housed in the accommodation recess 26. As described above, the accommodation recess 26 is located at a position higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a. More specifically, the accommodation recess 26 is located at a position higher than the revolving frame 21 and lower than the seat surface 22b of the driver's seat 22a. Therefore, the filling port 3a is also located at a position higher than the revolving frame 21 and lower than the seat surface 22b of the driver's seat 22a.

[0040] [Operation of the Shovel] In the shovel 1, the hydraulic drive system 2 operates as follows. That is, in the hydraulic drive system 2, hydrogen is supplied from the hydrogen tank 31 to the fuel cell 32 via the supply system unit 34. As a result, the fuel cell 32 generates electricity using hydrogen and oxygen in the atmosphere. The generated electricity is supplied from the fuel cell 32 to the electric pump device 33. To explain in more detail, the generated electricity is supplied from the fuel cell 32 to the electric motor 37. The electric motor 37 then drives the hydraulic pump 36, which discharges hydraulic fluid. The hydraulic fluid is supplied to each of the hydraulic actuators via the multi-control valve 35, thereby driving each hydraulic actuator. In this way, various tasks are performed by the shovel 1.

[0041] In the shovel 1 configured as described above, hydrogen is filled into the hydrogen tank 31 as follows. First, in the shovel 1, the storage recess 26 is opened by rotating the lid member 27. At this time, the maximum angle α through which the lid member 27 can be rotated is 90 degrees, that is, in the range of 60 degrees to 120 degrees, so the lid member 27 can be used as a canopy for the storage recess 26. Furthermore, when the lid member 27 is rotated to open the storage recess 26, the filling port 3a of the filling receptacle 3 is exposed to the left. A dispenser nozzle is then attached to the filling receptacle 3, and hydrogen is supplied from the dispenser nozzle to the filling port 3a. The supplied hydrogen is then supplied to the hydrogen tank 31 via the filling piping.

[0042] Thereafter, when filling of hydrogen into the hydrogen tank 31 is completed, the dispenser nozzle is removed from the filling receptacle 3. The person filling the hydrogen tank 31 then rotates the lid member 27 about the rotation axis L3 so as to swing it downward. This causes the accommodating recess 26 to be closed by the lid member 27. Once closed, the sealing member 28 provided on the lid member 27 abuts against the filling port 3a of the filling receptacle 3, sealing the filling port 3a. This prevents contamination or moisture from entering the filling port 3a while the accommodating recess 26 is closed.

[0043] In the excavator 1 of this embodiment, the filling port 3a of the filling receptacle 3 is located higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a. Therefore, the filling port 3a can be located away from the ground. This prevents dust from the ground from accumulating at the filling port 3a. Furthermore, the seat surface 22b is located at a height that is convenient for easy access and is suitable for getting on and off the excavator. Since the filling port 3a is located higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a, access to the filling port 3a is improved. Therefore, the filling operator is prevented from being forced into an extremely poor posture or from being subjected to excessive physical strain during filling. This facilitates the filling operation. This improves the efficiency of the filling operation.

[0044] Furthermore, in the excavator 1 of this embodiment, the filling port 3a is positioned higher than the rotating frame 21. This allows the filling port 3a to be positioned higher, for example, between the chest and shoulders of the person filling the tank. This makes it easier for the person filling the tank with hydrogen while standing upright, thereby improving the efficiency of the filling operation.

[0045] Furthermore, in the shovel 1 of this embodiment, the storage recess 26 accommodates the filling receptacle 3. The cover member 27 that covers the storage recess 26 opens and closes the storage recess 26 by rotating about a rotation axis L3. The rotation axis L3 is located above the storage recess 26 and extends in the left-right direction. Therefore, when the cover member 27 is rotated, it can be used as a canopy for the storage recess 26. Therefore, the cover member 27 can prevent contamination or moisture from entering the storage recess 26. This improves the contamination resistance of the filling receptacle 3.

[0046] Furthermore, in the shovel 1 of this embodiment, the sealing member 28 abuts against the filling port 3a when the lid member 27 is closed. This prevents contamination or moisture from entering the filling port 3a when the lid member 27 is closed. This improves the contamination resistance of the filling receptacle 3.

[0047] The seat 22a is located at a height of 400 mm to 550 mm from the bottom surface of the rotating body 12. This allows the person filling the tank to perform the hydrogen filling work while standing upright.

[0048] Second Embodiment A shovel 1A of the second embodiment is similar in configuration to the shovel 1 of the first embodiment. Therefore, with regard to the configuration of the shovel 1A of the second embodiment, differences from the shovel 1 of the first embodiment will be mainly described, and the same components will be assigned the same reference numerals and descriptions thereof will be omitted. Similarly, with regard to shovels 1B to 1E of the third to sixth embodiments described below, the same components as those of the above-described embodiments will be assigned the same reference numerals and descriptions thereof will be omitted.

[0049] In the excavator 1A of the second embodiment, as shown in Figures 8 and 9, the filling receptacle 3 is arranged as follows. That is, the filling receptacle 3 extends along the axis L4. The filling receptacle 3 is arranged so that the axis L4 extends obliquely downward. More specifically, the rotating body 12A further includes an accommodating recess 26A, a cover member 27A, and a sealing member 28A.

[0050] In the accommodating recess 26A, for example, at least a portion of the bottom portion 26Aa is inclined and faces diagonally downward. In this embodiment, the upper portion 26Ab of the bottom portion 26Aa is inclined so as to face diagonally downward. The refilling receptacle 3 is provided on the upper portion 26Ab so as to protrude in a direction intersecting the upper portion 26Ab, which in this embodiment is perpendicular to the direction of the upper portion 26Ab. As a result, the refilling receptacle 3 is positioned so that its axis L4 extends diagonally downward.

[0051] Furthermore, a seal groove 26c is formed around the open end of the accommodating recess 26A in the rotating body 12A. More specifically, a seal groove 26c is formed around the open end of the accommodating recess 26A in the side surface of the first exterior cover 24. The seal groove 26c is formed so as to surround the entire opening of the accommodating recess 26A. In this embodiment, the seal groove 26c is formed, for example, in a rectangular shape when viewed from the side.

[0052] The lid member 27A is formed larger than the opening of the accommodating recess 26A. More specifically, the lid member 27A is formed to correspond to the seal groove 26c so as to fit into the seal groove 26c. In this embodiment, the lid member 27A is formed in a rectangular shape in side view, similar to the seal groove 26c, but is formed slightly smaller than the seal groove 26c. Similar to the lid member 27 of the first embodiment, the lid member 27A is attached to the first exterior cover 24 via a hinge (not shown) so as to fit into the opening of the accommodating recess 26A. The lid member 27A rotates around the rotation axis L3 by the hinge. That is, the lid member 27A swings up and down by the hinge. This allows the lid member 27A to open and close the accommodating recess 26A.

[0053] The sealing member 28A is provided on the cover member 27. When the cover member 27A is closed, the sealing member 28 abuts against the outer periphery of the accommodation recess 26A, thereby sealing the accommodation recess 26A. More specifically, the sealing member 28A is provided on the surface of the cover member 27 facing the opening of the accommodation recess 26A. The sealing member 28 has an outer shape larger than the opening of the accommodation recess 26A. In this embodiment, the sealing member 28 is formed in the same shape as the seal groove 26c so that it fits into the seal groove 26c when the cover member 27 is closed. Therefore, when the cover member 27A is closed, the sealing member 28 abuts against the outer periphery of the accommodation recess 26A, sealing the accommodation recess 26A. The sealing member 28 is an annular member made of, for example, synthetic rubber. However, the sealing member 28 does not necessarily have to be an annular member and may be a plate-shaped member.

[0054] In the shovel 1A of the second embodiment, the filling receptacle 3 is disposed so that the axis L4 extends obliquely downward. Even if the filling port 3a is located at a high position, the dispenser nozzle can be inserted from below, further improving the efficiency of the filling operation. Furthermore, since the filling port 3a faces downward, the accumulation of contamination or moisture in the filling port 3a can be suppressed. Therefore, the contamination resistance of the filling receptacle 3 can be improved.

[0055] Furthermore, in the shovel 1A of the second embodiment, the sealing member 28A abuts against the outer periphery of the storage recess 26A when the lid member 27A is closed. This prevents contamination or moisture from entering the storage recess 26A when the storage recess 26A is closed. This improves the contamination resistance of the filling receptacle.

[0056] In addition, the shovel 1A of the second embodiment has the same effects as the shovel 1 of the first embodiment.

[0057] Third Embodiment In a third embodiment of the excavator 1B, as shown in FIG. 10 , a first exterior cover 24B of a revolving unit 12B is configured as follows. That is, the first exterior cover 24B includes a cover main body 24a and an openable / closable door 24b. The cover main body 24a is disposed on the rear side of the revolving unit 12 so as to cover the exterior frame 23 and is supported by the exterior frame 23. As a result, the first storage space 12a within the exterior frame 23 is covered by the cover main body 24a. The cover main body 24a also has an opening 24c on its side. The opening 24c is located, for example, on the left side of the cover main body 24a. In this embodiment, the opening 24c is provided by forming the left side of the cover main body 24a in an inverted concave shape. Note that the opening 24c does not necessarily have to be a large opening and may be a window-like opening. In the excavator 1B, the interior of the first exterior cover 24 is visible through the opening 24c. Although not shown, opening 24c faces exterior frame 23, which is exposed to the left side through opening 24c. Opening 24c is formed to be larger than fixed frame 29 in plan view, for example. That is, opening 24c faces fixed frame 29. Various components disposed inside cover body 24a, such as hydrogen tank 31 and electric pump device 33, are maintained through opening 24c.

[0058] The opening / closing door 24b closes the opening 24c. The opening / closing door 24b is configured to be openable and closable. The opening / closing door 24b is provided, for example, via a hinge on the outer edge of the opening 24c. In this embodiment, the opening / closing door 24b is provided on the rear portion of the outer edge of the opening 24c so as to be able to swing left and right. This allows an operator or the like to open the opening / closing door 24b by facing the left side of the first exterior cover 24B and pulling the opening / closing door 24b toward themselves.

[0059] Furthermore, in the excavator 1B of the third embodiment, the filling receptacle 3 is arranged as follows. That is, the revolving body 12B of the excavator 1B further includes a mounting member 30. The mounting member 30 is arranged inside the revolving body 12B, more specifically, inside the first exterior cover 24. In this embodiment, the mounting member 30 is provided so as to stand on the left end of the revolving frame 21. The mounting member 30 is also arranged on the door edge side of the opening and closing door 24b. The mounting member 30 includes a storage recess 26B and a cover member 27B.

[0060] The accommodating recess 26B is configured in the same manner as the accommodating recess 26 of the first embodiment. That is, the accommodating recess 26B is disposed on the mounting member 30, and is disposed in a position that is higher than the underside of the revolving unit 12 and lower than the seat surface 22b of the driver's seat 22a in the vertical direction. More specifically, the accommodating recess 26B is disposed in a position that is higher than the revolving frame 21 in the vertical direction. In this embodiment, the accommodating recess 26B is disposed, for example, midway between the seat surface 22b of the driver's seat 22a and the revolving frame 21. Furthermore, the accommodating recess 26B is formed, for example, in a rectangular shape when viewed from the left side and has a bottom.

[0061] The filling receptacle 3 is provided on the bottom portion 26a of the accommodation recess 26B so as to protrude from the bottom portion 26a into the accommodation recess 26B. Therefore, the filling receptacle 3 is attached to the swivel frame 21 via a mounting member 30. The filling receptacle 3 is disposed at a position higher than the underside of the rotating body 12B and lower than the height H of the seat surface 22b of the driver's seat 22a in the vertical direction. More specifically, the filling receptacle 3 is disposed at a position higher than the swivel frame 21 in the vertical direction. In this embodiment, the filling receptacle 3 is disposed, for example, midway between the seat surface 22b of the driver's seat 22a and the swivel frame 21.

[0062] The lid member 27B is configured in the same manner as the lid member 27 of the first embodiment. That is, the lid member 27 hangs down from the upper portion of the open end of the storage recess 26B via a hinge (not shown). The lid member 27B is located above the storage recess 26B and rotates about a rotation axis L3 that extends in the front-to-rear direction, thereby opening and closing the storage recess 26B.

[0063] In the excavator 1B of the third embodiment, the mounting member 30 is disposed inside the revolving body 12, more specifically, inside the first exterior cover 24. Therefore, the filling receptacle 3 can be disposed inside the revolving body 12, which further prevents contamination or moisture from entering the filling port 3a. This further improves the contamination resistance of the filling receptacle 3. In addition, the opening and closing door 24b is covered by the storage recess 26B with the lid member 27B, which further prevents contamination or moisture from entering.

[0064] In addition, the shovel 1B of the third embodiment has the same effects as the shovel 1 of the first embodiment.

[0065] <Fourth Embodiment> As shown in FIG. 11 , a shovel 1C according to a fourth embodiment includes a first exterior cover 24B for a revolving body 12C. The receptacle 3 is disposed as follows. Specifically, the receptacle 3 is attached to the exterior frame 23 so as to protrude outward from the opening 24c. In this embodiment, the receptacle 3 is attached to a vertical frame portion 23a, which is an example of a side frame portion. More specifically, the receptacle 3 is attached to a leading-edge frame portion 23Ca, which is the vertical frame portion 23a located on the left front side of the four vertical frame portions 23a. More specifically, the mounting frame portion 23Ca is disposed on the leading-edge side of the opening / closing door 24b, on the opposite side of the pivot axis in the front-to-rear direction in this embodiment.

[0066] The revolving body 12C includes a mounting member 30C and a cover member 27C. The mounting member 30C is attached to the leading-edge frame portion 23Ca. More specifically, the mounting member 30C is formed, for example, in a box shape. The internal space of the mounting member 30C forms a storage recess 26C. Furthermore, the mounting member 30C is positioned, for example, on the leading-edge frame portion 23Ca, higher than the underside of the revolving body 12 and lower than the seat surface 22b of the driver's seat 22a. More specifically, the mounting member 30C is positioned higher than the revolving frame 21 in the vertical direction. In this embodiment, the mounting member 30C is positioned, for example, midway between the seat surface 22b of the driver's seat 22a and the revolving frame 21. Furthermore, the mounting member 30C is attached so that the storage recess 26C protrudes outward from the opening 24c.

[0067] The filling receptacle 3 is provided on the bottom portion 26a of the storage recess 26C so as to protrude from the bottom portion 26a into the storage recess 26B. Therefore, the filling receptacle 3 is attached to the door-end side frame portion 23Ca via the mounting member 30. The filling receptacle 3 is positioned higher than the underside of the rotating body 12C and lower than the seat surface 22b of the driver's seat 22a in the vertical direction. More specifically, the filling receptacle 3 is positioned higher than the rotating frame 21 in the vertical direction. In this embodiment, the filling receptacle 3 is positioned, for example, midway between the seat surface 22b of the driver's seat 22a and the rotating frame 21.

[0068] The lid member 27C is configured similarly to the lid member 27B of the third embodiment. That is, the lid member 27C hangs down from the upper portion of the open end of the storage recess 26C via a hinge (not shown). The lid member 27C is located above the storage recess 26C and rotates about a rotation axis L3 that extends in the front-to-rear direction, thereby opening and closing the storage recess 26C.

[0069] In the excavator 1B of the third embodiment, the filling receptacle 3 is attached to the exterior frame 23. Therefore, the filling receptacle 3 can be easily attached to the revolving body 12C.

[0070] In the excavator 1B of the third embodiment, the filling receptacle 3 is attached to the door-end frame portion 23Ca that is located on the outer left side within the revolving body 12C. Therefore, the filling receptacle 3 can be located on the outer left side of the revolving body 12C, thereby improving access to the filling receptacle 3.

[0071] Furthermore, in the excavator 1B of the third embodiment, the filling receptacle 3 is attached to the door-end side frame portion 23Ca extending in the height direction, which improves the design freedom regarding the attachment position of the filling receptacle 3 and also improves the accessibility of the filling receptacle 3 in the height direction.

[0072] Furthermore, in the excavator 1B of the third embodiment, the filling receptacle is disposed on the door-end frame portion 23Ca. Therefore, when the opening and closing door 24b is opened, the accessibility to the filling receptacle 3 can be improved. This makes it easier to fill with hydrogen.

[0073] In addition, the shovel 1C of the fourth embodiment has the same effects as the shovel 1B of the third embodiment.

[0074] Fifth Embodiment In a fifth embodiment of the excavator 1D, as shown in FIG. 12 , an exterior frame 23D and a first exterior cover 24D of a revolving body 12D are configured as follows. That is, the first exterior cover 24D includes a cover main body 24a and a double-door 24d. The double-door 24d covers the opening 24c. The double-door 24d includes a first door 24e and a second door 24f. The two doors 24e, 24f are provided at the outer edge of the opening 24c so as to be rotatable on both the left and right sides. In this embodiment, the two doors 24e, 24f rotate about axes L5, L6 extending in the up-down direction on both the left and right sides of the outer edge of the opening 24c. Furthermore, the two doors 24e, 24f are arranged so that their door edges are butted against each other. Therefore, the two doors 24e, 24f open and close the opening 24c by rotating.

[0075] In the exterior frame 23D, a door-edge side frame portion 23Da, which is another vertical frame portion 23a, is erected between two vertical frame portions 23a arranged spaced apart in the front-to-rear direction. The door-edge side frame portion 23Da is arranged so that it protrudes outward from the opening 24c. More specifically, the door-edge side frame portion 23Da is arranged on the door-edge side of the two doors 24e, 24f. In this embodiment, the door-edge side frame portion 23Da is arranged, for example, in the front-to-rear middle portion of the opening 24c. A filling receptacle 3 is attached to the door-edge side frame portion 23Da. More specifically, the rotating body 12D includes an attachment member 30C and a cover member 27C. The filling receptacle 3 is attached to the door-edge side frame portion 23Da via the attachment member 30C.

[0076] In the excavator 1D of the fifth embodiment, the door-end side frame portion 23Da is disposed on the door-end side frame 24Da at the door ends of the doors 24e, 24f of the double-door 24d. Therefore, by opening the doors, it is possible to improve access to the filling receptacle 3. This makes it easier to fill with hydrogen.

[0077] In addition, the shovel 1D of the fifth embodiment has the same effects as the shovel 1C of the fourth embodiment.

[0078] Sixth Embodiment In a shovel 1E of the sixth embodiment, as shown in FIG. 13 , the receptacle 3 is disposed as follows. That is, the receptacle 3 is attached to the fixed frame 29 so as to be exposed to the outside through the opening 24c when the door 24b is open. More specifically, as described above, the fixed frame 29 is formed, for example, in a U-shape when viewed from the left side. That is, the fixed frame 29 has a mounting frame portion 29a extending vertically to the front left. The receptacle 3 is attached to the mounting frame portion 29a. More specifically, the revolving bed 12E includes a mounting member 30C and a cover member 27C. The receptacle 3 is attached to the mounting frame portion 29a via the mounting member 30C.

[0079] In the excavator 1E of the sixth embodiment, the filling receptacle 3 is attached to the fixed frame 29 so as to protrude outward. Therefore, the filling receptacle 3 can be easily attached to the rotating body 12.

[0080] In addition, the shovel 1E of the sixth embodiment has the same effects as the shovel 1C of the fourth embodiment.

[0081] <Other Embodiments> In the excavators 1C to 1E of the fourth to sixth embodiments, the filling receptacle 3 does not necessarily have to be attached to the storage recess 26C, but may be attached directly to the frame portions 23Ca, 23Da, and 29a. Furthermore, the lid members 27 and 27A do not necessarily have to be provided with the sealing members 28 and 28A. For example, the lid member 27 may be tightly fitted into the storage recess 26 when closed to prevent contamination from entering the storage recess 26A. Furthermore, the storage recesses 26, 26A to 26C do not necessarily have to be located on the left side of the revolving bed 12, but may be located on the right side, rear side, or front side.

[0082] Although the excavators 1, 1A to 1E of the first to sixth embodiments are equipped with hydraulic actuators, they may be electric actuators. In this case, the power generated by the fuel cell is supplied to the electric actuators via a battery or directly. Furthermore, in the excavators 1A to 1E of the first to sixth embodiments, the filling port 3a does not necessarily have to be located at a position on the revolving body 12, 12A to 12E that is higher than the underside of the revolving body 12, 12A to 12E and lower than the seat surface 22b of the operator's seat 22a.

[0083] <Illustrative embodiment> In a first aspect, the excavator comprises a rotating body including a cabin in which a driver's seat is located and which is rotatably mounted on a traveling device, a hydrogen tank disposed within the rotating body, a fuel cell which consumes hydrogen in the hydrogen tank to generate electricity, and a filling receptacle which is disposed on the rotating body and includes a filling port at its tip and which is connected to the hydrogen tank, the filling port being disposed at a position on the rotating body which is higher than the underside of the rotating body and lower than the seat surface of the driver's seat.

[0084] According to the above aspect, the filling port of the filling receptacle is positioned higher than the underside of the rotating body and lower than the seat surface of the driver's seat. Therefore, the filling port can be positioned away from the ground. This makes it possible to prevent dust from the ground from accumulating at the filling port. Furthermore, the seat surface is provided at a height that is convenient for easy access when getting in and out of the vehicle. Since the filling port is positioned higher than the underside of the rotating body and lower than the seat surface of the driver's seat, access to the filling port can be improved. Therefore, when filling, it is possible to prevent the person filling from being forced into an extremely poor posture or being subjected to excessive physical strain. This makes the filling operation easier. This improves the efficiency of the filling operation.

[0085] In a second aspect, the shovel is the shovel of the first aspect, wherein the rotating body further includes a rotating frame that is rotatably mounted on the traveling device, and the filling port is positioned at a higher position than the rotating frame.

[0086] According to the above aspect, the filling port is positioned higher than the rotating frame. Therefore, the filling port can be positioned higher, for example, between the chest and shoulders of the person filling the hydrogen tank. This makes it easier for the person filling the hydrogen tank to perform the hydrogen filling operation while standing upright. This improves the efficiency of the filling operation.

[0087] In a third aspect, the shovel is the shovel of the first or second aspect, wherein the filling receptacle is arranged so that its axis extends obliquely downward.

[0088] According to the above aspect, the filling receptacle is arranged so that its axis extends obliquely downward. Even if the filling port is located at a high position, the dispenser nozzle can be inserted from below, further improving the efficiency of the filling operation. Furthermore, since the filling port faces downward, it is possible to prevent contamination or moisture from accumulating in the filling port. Therefore, the contamination resistance of the filling receptacle can be improved.

[0089] In a fourth aspect, the shovel is the shovel of any one of the first to third aspects, wherein the rotating body further includes a storage recess formed on the side surface for storing the filling receptacle, and a cover member for covering the storage recess, the cover member opening and closing the storage recess by rotating around a rotation axis, the rotation axis being located above the storage recess and extending in a transverse direction that intersects with the height direction of the rotating body.

[0090] According to the above aspect, the storage recess accommodates a filling receptacle. The cover member that closes the storage recess opens and closes the storage recess by rotating about a rotation axis. The rotation axis is located above the storage recess and extends in a direction intersecting the height direction of the rotating body. Therefore, when the cover member is rotated, it can be used as a canopy for the storage recess. Therefore, the cover member can prevent contamination or moisture from entering the storage recess. Therefore, the contamination resistance of the filling receptacle can be improved.

[0091] In a fifth aspect, the shovel is the shovel of any one of the first to fourth aspects, wherein the rotating body further includes a storage recess for storing the filling receptacle, a cover member for opening and closing the storage recess, and a sealing member provided on the cover member, and the sealing member abuts against the filling port when the cover member is closed.

[0092] According to the above aspect, the sealing member abuts against the filling port when the lid member is closed. This prevents contamination or moisture from entering the filling port when the lid member is closed. This improves the contamination resistance of the filling receptacle.

[0093] In a sixth aspect, the shovel is the shovel of any one of the first to fourth aspects, wherein the rotating body further includes a storage recess for storing the filling receptacle, a cover member for opening and closing the storage recess, and a sealing member provided on the cover member, and the sealing member abuts against the outer peripheral edge of the storage recess when the cover member is closed.

[0094] According to the above aspect, the sealing member abuts against the outer periphery of the accommodating recess when the lid member is closed. Therefore, when the lid member is closed, it is possible to prevent contamination or moisture from entering the accommodating recess. Therefore, it is possible to improve the contamination resistance of the filling receptacle.

[0095] In a seventh aspect, the shovel is the shovel of any one of the first to sixth aspects, wherein the rotating body includes an exterior cover that covers the hydrogen tank and an exterior frame that supports the exterior cover, and the filling receptacle is attached to the exterior frame.

[0096] According to the above aspect, the filling receptacle is attached to the exterior frame, so that the filling receptacle can be easily attached to the rotating body.

[0097] In an eighth aspect, the shovel is the shovel of the seventh aspect, wherein the exterior frame has a side frame portion arranged on the outer side in the vehicle width direction within the rotating body, and the filling receptacle is attached to the side frame portion.

[0098] According to the above aspect, the filling receptacle is attached to the side frame portion disposed on the outer side in the vehicle width direction within the rotating body. Therefore, the filling receptacle can be disposed on the outer side of the rotating body, thereby improving access to the filling receptacle.

[0099] In a ninth aspect, the shovel is the shovel of the seventh or eighth aspect, wherein the exterior frame has a vertical frame portion extending in the height direction of the rotating body, and the filling receptacle is attached to the vertical frame portion.

[0100] According to the above aspect, the refilling receptacle is attached to the vertical frame portion extending in the height direction, which improves the design freedom regarding the attachment position of the refilling receptacle and also improves the accessibility of the refilling receptacle in the height direction.

[0101] In a tenth aspect, the shovel is the shovel of any one of the seventh to ninth aspects, wherein the exterior cover has an opening / closing door, the exterior frame has at least one vertical frame portion including a door-edge side frame portion arranged on the door-edge side of the opening / closing door, and the filling receptacle is attached to the door-edge side frame.

[0102] According to the above aspect, the filling receptacle is disposed on the door-end frame, which improves accessibility to the filling receptacle when the door is opened, thereby facilitating hydrogen filling.

[0103] In an eleventh aspect, the shovel is the shovel of any one of the seventh to ninth aspects, wherein the exterior cover has a double door including a first door and a second door, the exterior frame has at least one vertical frame portion including a door-edge side frame portion arranged on the door-edge side of the first door and the second door, and the filling receptacle is attached to the door-edge side frame.

[0104] According to the above aspect, the filling receptacle is disposed on the door edge frame at the door edge of each of the double doors. Therefore, by opening the doors, the access to the filling receptacle can be improved, which makes it easier to fill with hydrogen.

[0105] In a twelfth aspect, the shovel is the shovel of the first aspect, wherein the rotating body includes an exterior cover that covers the hydrogen tank and a fixed frame that fixes the hydrogen tank, the exterior cover has an opening and closing door, and the filling receptacle is attached to the fixed frame so as to be exposed to the outside when the opening and closing door is open.

[0106] According to the above aspect, the filling receptacle is attached to the fixed frame so as to protrude outward, which makes it easy to attach the filling receptacle to the rotating body.

[0107] In a thirteenth aspect, the excavator comprises a rotating body rotatably mounted on a traveling device, a hydrogen tank disposed within the rotating body, a fuel cell that consumes hydrogen in the hydrogen tank to generate electricity, and a filling receptacle mounted on the rotating body and connected to the hydrogen tank, wherein the rotating body includes an exterior cover that covers the hydrogen tank and an exterior frame that supports the exterior cover, and the filling receptacle is attached to the exterior frame.

[0108] According to the above aspect, the filling receptacle is attached to the exterior frame. Therefore, the filling receptacle can be easily accessed, thereby improving the efficiency of the filling operation. Furthermore, since the filling receptacle is attached to the exterior frame, the filling receptacle can be easily attached to the rotating body.

[0109] From the above description, many modifications and other embodiments of the present disclosure will be apparent to those skilled in the art. Therefore, the above description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode for carrying out the present disclosure. Details of the structure and / or function thereof can be substantially changed without departing from the spirit of the present disclosure.

Claims

1. An excavator comprising: a rotating body including a cabin in which a driver's seat is located and which is rotatably mounted on a traveling device; a hydrogen tank disposed within the rotating body; a fuel cell which consumes hydrogen in the hydrogen tank to generate electricity; and a filling receptacle disposed on the rotating body, which includes a filling port at its tip and which is connected to the hydrogen tank, the filling port being disposed at a position on the rotating body which is higher than the underside of the rotating body and lower than the seat surface of the driver's seat.

2. The shovel according to claim 1, wherein the rotating body further includes a rotating frame that is rotatably mounted on the traveling device, and the filling port is disposed at a position higher than the rotating frame.

3. A shovel as described in claim 1, wherein the filling receptacle is arranged so that its axis extends obliquely downward.

4. The shovel described in claim 1, wherein the rotating body further includes a storage recess formed on a side surface thereof for accommodating the filling receptacle, and a cover member for closing the storage recess, the cover member opening and closing the storage recess by rotating about a rotation axis, and the rotation axis is located above the storage recess and extends in a direction intersecting the height direction of the rotating body.

5. The shovel described in claim 1, wherein the rotating body further includes a storage recess for storing the filling receptacle, a cover member for opening and closing the storage recess, and a sealing member provided on the cover member, and the sealing member abuts against the filling port when the cover member is in a closed state.

6. The shovel described in claim 1, wherein the rotating body further includes a storage recess for storing the filling receptacle, a cover member for opening and closing the storage recess, and a sealing member provided on the cover member, and the sealing member abuts against the outer peripheral edge of the storage recess when the cover member is in a closed state.

7. The excavator according to claim 1, wherein the rotating body includes an exterior cover that covers the hydrogen tank and an exterior frame that supports the exterior cover, and the filling receptacle is attached to the exterior frame.

8. The excavator according to claim 7, wherein the exterior frame has a side frame portion disposed on the outer side in the vehicle width direction within the rotating body, and the filling receptacle is attached to the side frame portion.

9. The excavator according to claim 7, wherein the exterior frame has a vertical frame portion extending in the height direction of the rotating body, and the filling receptacle is attached to the vertical frame portion.

10. A shovel as described in claim 7, wherein the exterior cover has an opening / closing door, the exterior frame has at least one vertical frame portion including a door-end side frame portion arranged on the door-end side of the opening / closing door, and the filling receptacle is attached to the door-end side frame.

11. The excavator as described in claim 7, wherein the exterior cover has a double door including a first door and a second door, the exterior frame has at least one vertical frame portion including a door-end side frame portion arranged on the door-end side of the first door and the second door, and the filling receptacle is attached to the door-end side frame.

12. The excavator described in claim 1, wherein the rotating body includes an exterior cover that covers the hydrogen tank and a fixed frame that fixes the hydrogen tank, the exterior cover has an opening and closing door, and the filling receptacle is attached to the fixed frame so as to be exposed to the outside when the opening and closing door is open.

13. An excavator comprising: a rotating body rotatably mounted on a traveling device; a hydrogen tank disposed within the rotating body; a fuel cell that generates electricity by consuming hydrogen in the hydrogen tank; and a filling receptacle mounted on the rotating body and connected to the hydrogen tank, wherein the rotating body includes an exterior cover that covers the hydrogen tank and an exterior frame that supports the exterior cover, and the filling receptacle is attached to the exterior frame.

Images