Electric work machinery

Abstract

To provide an electric work machine that can prevent parts of the housing chamber other than the power supply unit from being exposed to the outside while power is being supplied. [Solution] The device comprises a storage chamber 42 capable of accommodating a tool, a storage chamber cover 46 that covers the storage chamber 42 in an openable and closable manner, a power supply unit having a power supply port that can be connected to a power supply component, and a power supply unit cover 52 that covers the power supply unit in an openable and closable manner. The power supply unit is mounted in the storage chamber 42, and the power supply unit cover 52 is provided on the storage chamber cover 46 in a position corresponding to the mounting position of the power supply unit.

Description

Technical Field

[0001] The present disclosure relates to an electric working machine that uses electricity as an energy source.

Background Art

[0002] Electric working machines that use electricity as an energy source are known. An electric working machine (electric construction machine in Patent Document 1) described in Patent Document 1 is an example. The electric working machine described in Patent Document 1 has a power supply unit provided outside the operator's cab for cable connection to an external power source. When an operator connects a cable from the external power source to the power supply unit, electric power is supplied to the electric working machine from the external power source. Although different from an electric working machine, Patent Document 2 discloses a working machine provided with a holding structure for statically holding a tool box used for maintenance in a storage space within a revolving body.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when constructing an electric working machine, if a power supply unit is installed in a storage room for accommodating a tool box or the like as described in Patent Document 2, components that require external access to the working machine can be aggregated. On the other hand, when an operator opens the door of the storage room for power supply, the storage room is unnecessarily exposed to the outside. Therefore, dust is likely to enter the storage room during power supply, and the possibility of losing a tool box or the like stored in the storage room also increases.

[0005] This disclosure was made to solve the above-mentioned problems, and its purpose is to provide an electric work machine that can suppress the exposure of parts of the housing chamber other than the power supply unit to the outside while power is being supplied. [Means for solving the problem]

[0006] An electric work machine according to a first embodiment for solving the above problems comprises a storage chamber capable of accommodating a tool, a storage chamber cover that opens and closes to cover the storage chamber, a power supply unit having a power supply port that can be connected to a power supply component extending from an external power source, and a power supply unit cover that opens and closes to cover the power supply unit, wherein the power supply unit is mounted in the storage chamber, and the power supply unit cover is provided in the portion of the storage chamber cover corresponding to the mounting position of the power supply unit.

[0007] According to the first embodiment, power can be supplied by connecting the power supply component to the power supply port with the power supply unit cover open. At this time, the storage chamber cover is closed, so that parts of the storage chamber other than the power supply unit are covered by the storage chamber cover. This prevents the storage chamber from being exposed to the outside while power is being supplied. In addition, when an operator needs to take tools in or out of the storage chamber, the operator can access the storage chamber by opening the storage chamber cover.

[0008] The electric work machine according to the second embodiment is preferably further equipped with the following features in addition to the electric work machine according to the first embodiment. That is, the electric work machine according to the second embodiment further comprises a battery unit arranged adjacent to the housing chamber and a first partition plate separating the housing chamber and the battery unit.

[0009] According to the second embodiment, by providing a first partition plate that separates the containment chamber and the battery unit, it is possible to prevent the worker from touching the battery unit when the worker accesses the containment chamber.

[0010] The electric work machine according to the third embodiment is preferably further characterized in the electric work device according to the second embodiment. That is, in the electric work machine according to the second embodiment, the battery unit is located at the rear of the machine frame, the first partition plate partitions the lateral space located to the side of the battery case from the battery unit, and the housing chamber is located in the lateral space.

[0011] According to the third embodiment, the storage compartment is located in the lateral space formed to the side of the battery case positioned at the rear of the aircraft frame, thereby making effective use of the lateral space.

[0012] The electric work machine according to the fourth embodiment is preferably an electric work machine according to any of the first to third embodiments that further includes the following features: that is, the electric work machine according to the fourth embodiment further includes a battery-related equipment housing chamber for housing battery-related equipment disposed adjacent to the housing chamber, and a second partition plate separating the housing chamber and the battery-related equipment housing chamber.

[0013] According to the fourth embodiment, by providing a second partition plate that separates the storage chamber and the battery-related equipment storage chamber, it is possible to prevent workers from touching the battery-related equipment when they access the storage chamber.

[0014] An electric work machine according to the fifth embodiment is preferably an electric work machine according to any of the second to fourth embodiments, further comprising the following features: that is, an electric work machine according to the fifth embodiment further comprises a motor housing chamber arranged adjacent to the housing chamber and housing an electric motor driven by power supplied from the battery unit, and a third partition plate separating the housing chamber and the motor housing chamber.

[0015] According to the fifth embodiment, by providing a third partition plate that separates the housing chamber and the motor housing chamber, it is possible to prevent workers from touching the electric motor when they access the housing chamber.

[0016] The electric work machine according to the sixth embodiment is preferably an electric work machine according to any of the first to fifth embodiments, further comprising the following features: In the electric work machine according to the sixth embodiment, the storage chamber has a mounting platform on which the tool can be mounted.

[0017] According to the sixth embodiment, the storage chamber has a mounting platform on which the tool can be placed, so that the tool can be stored in the storage chamber in a stable state.

[0018] An electric work machine according to the seventh embodiment is preferably an electric work machine according to any of the first to sixth embodiments, further comprising the following features: In the electric work machine according to the seventh embodiment, the power supply unit further comprises a release device for releasing the connection between the power supply component and the power supply port, and an access unit which is a space that enables the operation of the release device.

[0019] According to the seventh aspect, when the connection between the power supply component and the power supply port cannot be released, the operator can manually release the connection between the power supply component and the power supply port by operating a release device via the access unit.

[0020] The electric work machine according to the eighth embodiment is preferably an electric work machine according to any of the first to seventh embodiments, further comprising the following features: In the electric work machine according to the eighth embodiment, the power supply unit cover is shaped to be openable and closable to the extent that the storage chamber cover can be opened and closed to the extent that the tool stored in the storage chamber can be removed when the power supply component is connected to the power supply port.

[0021] According to the eighth aspect, even when the power supply component is connected to the power supply port, the storage chamber cover can be opened to the extent that the tool can be removed, allowing the tool to be taken out. [Effects of the Invention]

[0022] According to the present disclosure, it is possible to provide a power-operated work machine that can prevent a portion other than the power supply portion of the accommodation chamber from being exposed to the outside during power supply.

Brief Description of the Drawings

[0023] [Figure 1] It is a left side view of the power-operated work machine according to the first embodiment as viewed from the left side. [Figure 2] It is a perspective view of the power-operated work machine of FIG. 1 as viewed from the right rear. [Figure 3] It is a top view of the upper swing body as viewed from above, showing the arrangement position of the bumper on the swing frame. [Figure 4] It is a top view of the upper swing body as viewed from above. [Figure 5] It is a right side view of the upper swing body as viewed from the right side. [Figure 6] It is a right side view showing a state in which the accommodation chamber cover is opened in the right side view of FIG. 4. [Figure 7] It is a view showing a state in which both the accommodation chamber cover and the power supply portion cover are closed. [Figure 8] It is a view showing a state in which the accommodation chamber cover is open. [Figure 9] It is a view showing a state in which the power supply portion cover is open. [Figure 10] It is an enlarged view of the power supply portion of FIG. 7. [Figure 11] It is a view showing the internal structure of the mounting bracket. [Figure 12] It is a view showing a state in which the accommodation chamber cover is opened with the power supply cable connected to the connection mechanism. [Figure 13] It is a view showing each state of the accommodation chamber cover and the power supply portion cover according to the second embodiment.

Modes for Carrying Out the Invention

[0024] [First Embodiment] An electric work machine 100 according to an embodiment of the present disclosure will be described with reference to the drawings. Figure 1 is a left side view of the electric work machine 100 as seen from the left side. Figure 2 is a perspective view of the electric work machine 100 as seen from the right rear.

[0025] As shown in Figure 1, the electric powered work machine 100 comprises a lower traveling body 1 including a traveling device, an upper rotating body 2 supported by the lower traveling body 1 so as to be able to rotate relative to the lower traveling body 1 around a vertically extending pivot axis Z, and a work device 3 supported by the upper rotating body 2. Although the electric powered work machine 100 in this embodiment is a hydraulic excavator, the work machine in this disclosure is not limited to a hydraulic excavator and may be other work machines such as cranes and bulldozers. The traveling device may be a crawler-type traveling device as shown in Figure 1, or a traveling device having tires not shown. A blade 12 may be attached to the front of the lower traveling body 1.

[0026] The work device 3 includes a boom 4 that is pivotably mounted on the upper slewing body 2, an arm 5 that is rotatably mounted on the boom 4, and a tip attachment 6 that is rotatably mounted on the arm 5. In this embodiment, the tip attachment 6 is a bucket, but the tip attachment may be other tip attachments such as a grapple, fork, or crusher.

[0027] The upper rotating body 2 comprises a rotating frame 20, a cab 11 supported by the rotating frame 20, and an outer wall 13. The outer wall 13 has, for example, a box shape and defines a machine room 14. Various equipment is housed inside the machine room 14. The various equipment housed in the machine room 14 will be described later. Note that the rotating frame 20 is an example of the machine frame of this disclosure.

[0028] The slewing frame 20 is a member that is rotatably supported by the lower traveling body 1. The slewing frame 20 supports the cab 11 and the outer wall 13. A pair of raising units 22 are formed on the slewing frame 20. The raising units 22 support the boom 4 so that it can be raised and lowered. The base end 4A of the boom 4, shown by the dashed line in Figure 1, is attached to the raising units 22. As shown by the dashed line in Figure 1, the raising units 22 have a shape that stands upright from the slewing frame 20 and extends forward and backward.

[0029] The electric work machine 100 is equipped with multiple actuators. Each of the multiple actuators is operated by the supply of hydraulic fluid discharged from a hydraulic pump 34 (see Figure 3). The multiple actuators include a boom cylinder 7 for raising and lowering the boom 4, an arm cylinder 8 for rotating the arm 5, a tip attachment cylinder 9 for rotating the tip attachment 6, a hydraulic motor (not shown) for rotating the upper slewing body 2 relative to the lower traveling body 1, and a traveling motor (not shown) for traveling the lower traveling body 1.

[0030] The machine room 14 is located in the space on the upper surface of the slewing frame 20, excluding the area where the cab 11 is positioned and the area where the base end 4A of the boom 4 is attached. The machine room 14 is located, for example, in the space behind the slewing frame 20 and in the space to the side (for example, to the right) of the cab 11. The machine room 14 is covered by an outer wall 13. The outer wall 13 protects the various equipment housed inside the machine room 14.

[0031] Figure 3 is a top view of the upper slewing body 2, viewed from above, showing the position of the bumper 21 on the slewing frame 20. Figure 4 is a top view of the upper slewing body 2, viewed from above, showing the position of various pieces of equipment on the slewing frame 20. Figure 5 is a right side view of the upper slewing body 2, viewed from the right side. In Figure 3, the various pieces of equipment and the outer wall 13 on the slewing frame 20 are shown with the components removed. In Figure 4, the bumper 21 and outer wall 13 protecting the machine room 14 are shown with the components removed.

[0032] As shown in Figure 3, the cab 11 is positioned to the left front of the slewing frame 20, and the raising platform 22 is positioned in front of the center of the slewing frame 20. A bumper 21 is positioned along the outer edge of the slewing frame 20, behind the cab 11. The bumper 21 comprises a first bumper 21a positioned on the left side of the slewing frame 20, a second bumper 21b positioned on the right side of the slewing frame 20, and a third bumper 21c positioned on the rear side of the slewing frame 20. An outer wall 13 is positioned on the bumper 21. The bumper 21 is a component that protects various equipment positioned on the slewing frame 20, and is positioned to protrude outward from the outer wall 13.

[0033] As shown in Figure 4, the machine room 14 is located at the rear of the slewing frame 20. The machine room 14 is also located in a part of the front right of the slewing frame 20. In other words, the machine room 14 is the area enclosed by the dashed line in Figure 4.

[0034] The machine room 14 houses various pieces of equipment on the slewing frame 20, including a battery unit 30, an electric motor 32, a hydraulic pump 34, a radiator 36, a fan 38, and an inverter 41.

[0035] The electric work machine 100 uses power supplied from the battery unit 30 to drive the electric motor 32, which in turn drives the hydraulic pump 34 to generate hydraulic pressure. The hydraulic pressure generated by the hydraulic pump 34 is supplied to multiple actuators, including the boom cylinder 7. In this way, the electric work machine 100 is driven using the power of the battery unit 30 as its energy source. The battery unit 30 is protected by a battery case 30a.

[0036] The battery unit 30 supplies power to the electric motor 32. The battery unit 30 is located at the rear of the slewing frame 20, in the center in the left-right direction. In connection with this, a left-side space 40L is formed to the left of the battery unit 30. Also, a right-side space 40R is formed to the right of the battery unit 30. Here, "lateral" refers to the direction parallel to the width direction (left-right direction) of the slewing frame 20.

[0037] In this embodiment, the battery unit 30 is extended to the right on the slewing frame 20 to increase the operating time of the electric work machine 100, thereby securing battery capacity. Also, as shown in Figure 4, the rear part of the slewing frame 20 has a shape in which the width narrows towards the rear. Therefore, the rear end portion of the right side of the battery unit 30 can be positioned close to the edge of the slewing frame 20. On the other hand, the portion of the right side of the battery unit 30 excluding the rear end portion is positioned further away from the edge of the slewing frame 20 than the rear end portion. As a result, a right-side space 40R is formed to the right of the battery unit 30. When viewed from above, the right-side space 40R is formed in a roughly trapezoidal shape, with the width of the front portion of the right-side space 40R being roughly the same, and the width of the rear portion of the right-side space 40R narrowing towards the rear. As a result, the right-side space 40R becomes even narrower, limiting the types of equipment that can be accommodated in the right-side space 40R. Furthermore, the various equipment mounted on the slewing frame 20 is positioned on the inside of the edge of the slewing frame 20 when viewed from above, so as not to interfere with the outer wall 13 located on the edge of the slewing frame 20.

[0038] In this embodiment, as shown in Figures 4 and 5, the relatively large electric motor 32 and hydraulic pump 34 are housed in a motor housing chamber 45 formed in front of the right-side space 40R. The electric motor 32 and hydraulic pump 34 are arranged side by side in the front-to-back direction within the motor housing chamber 45. Meanwhile, in the right-side space 40R, a housing chamber 42 and a battery-related equipment housing chamber 44 are arranged adjacent to each other in the vertical direction. The housing chamber 42 and battery-related equipment housing chamber 44 and the motor housing chamber 45 are arranged adjacent to each other in the front-to-back direction. Furthermore, the housing chamber 42 and battery-related equipment housing chamber 44 are also arranged adjacent to the battery unit 30.

[0039] A partition wall 47, as shown in Figure 4, is positioned between the housing chamber 42 and the battery-related equipment housing chamber 44 and the motor housing chamber 45. The partition wall 47 separates the housing chamber 42 and the battery-related equipment housing chamber 44 from the motor housing chamber 45. The partition wall 47 prevents workers from touching the electric motor 32 from the housing chamber 42. Note that the partition wall 47 is an example of the third partition plate of this disclosure.

[0040] The storage compartment 42 is configured to accommodate a tool bag 70 and a grease gun 74, which will be described later. A storage compartment cover 46 is attached to the outer wall 13, which opens and closes to cover the storage compartment 42. When the storage compartment cover 46 is closed, the storage compartment 42 is shielded from the outside. The storage compartment cover 46 can be opened and closed by rotating it, for example, with its rear end as a pivot point. To open the storage compartment cover 46, the lock on the storage compartment cover 46 is released by operating the cover opening / closing part 49, which is made up of a locking mechanism shown in Figure 5 and attached to the storage compartment cover 46, making it possible to open the storage compartment cover 46.

[0041] The battery-related equipment housing 44 houses an inverter 41. The inverter 41 is a device that converts the DC current output from the battery unit 30 into a three-phase AC current and supplies it to the electric motor 32, and has the function of adjusting the rotational speed of the electric motor 32. Since the inverter 41 is a high-voltage device, it is undesirable for workers to touch it during work. To address this, the battery-related equipment housing 44 is shielded from the outside by an inverter cover 48. The inverter cover 48 is attached so as to cover the battery-related equipment housing 44. The inverter cover 48 may be detachable, for example, by bolts. This prevents the inverter cover 48 from being removed by workers during work, and prevents workers from touching the inverter 41 during work. Note that the inverter 41 is an example of battery-related equipment in this disclosure.

[0042] Figure 6 shows the right side view of Figure 5 with the housing cover 46 open. As shown in Figure 6, a flat partition plate 50 is placed between the housing compartment 42 and the battery-related equipment housing compartment 44. The partition plate 50 separates the housing compartment 42 from the battery-related equipment housing compartment 44. The partition plate 50 prevents workers from touching the inverter 41 from the housing compartment 42. Note that the partition plate 50 is an example of the second partition plate of this disclosure.

[0043] The storage chamber 42 includes a tool bag storage section 64, a grease gun storage section 66, a power supply section 68, and a cover holding section 65. The tool bag storage section 64 and the power supply section 68 are located in front of the grease gun storage section 66 in the storage chamber 42 and are arranged adjacent to each other vertically. The tool bag storage section 64 and the power supply section 68 are located in the front portion of the right-side space 40R where the left and right widths are approximately the same, while the grease gun storage section 66 is located in the rear portion of the right-side space 40R where the left and right widths become narrower towards the rear. The grease gun storage section 66 is located on the rear side of the cover holding section 65 and is configured to store the grease gun 74 in a vertical position. In this case, the grease gun storage section 66 is formed to be vertically elongated along the vertical direction in the storage chamber 42. In this embodiment, the tool bag storage section 64 is located above the power supply section 68, but the tool bag storage section 64 may be located below the power supply section 68. Furthermore, a grease gun storage unit 66 may be positioned in front of the tool bag storage unit 64 and the power supply unit 68.

[0044] The cover holding portion 65 has a side portion 65a, a first mounting portion 65b, and a second mounting portion 65c. The side portion 65a is a rod-shaped member positioned at the rear end of the rear portion of the right-side space 40R where the width narrows towards the rear, and close to the edge of the pivot frame 20. There is a gap between the side portion 45a and the mounting bracket 86 located in front of the side portion 45a. The first mounting portion 65b and the second mounting portion 65c are positioned at a predetermined vertical distance from the side surface of the side portion 45a. The first mounting portion 65b and the second mounting portion 65c are each provided with bolt holes for attaching bolts to fix the pivot point at the rear end of the housing chamber cover 46. The rear end of the housing chamber cover 46 is provided with a pair of upper and lower hinges, and the housing chamber cover 46 is supported so that it can be opened and closed by being attached to the cover holding portion 65 using these hinges as pivot points.

[0045] The tool bag storage unit 64 is mounted at the front of the storage chamber 42. The tool bag storage unit 64 stores a tool bag 70 containing tools such as screwdrivers, spanners, and wrenches. Since the tool bag storage unit 64 only stores the tool bag 70 and does not require a large space, it can be placed in the storage chamber 42 (right side space 40R). The tools such as screwdrivers, spanners, and wrenches stored in the tool bag 70 are just examples of the tools of this disclosure.

[0046] The tool bag storage section 64 has a mounting platform 72 on which the tool bag 70 can be placed. The mounting platform 72 has a bottom plate 72a, a side plate 72b, and a fall prevention plate 72c.

[0047] The lower plate 72a is a flat plate located at the lower end of the tool bag storage section 64 and arranged parallel to the horizontal plane. The tool bag 70 is placed on the lower plate 72a. The lower plate 72a is supported, for example, by a mounting bracket 86, which will be described later and constitutes the power supply section 68. The lower plate 72a also functions as a partition plate separating the tool bag storage section 64 and the power supply section 68.

[0048] The side plate 72b is positioned adjacent to the battery unit 30 in the tool bag storage section 64 and is arranged substantially perpendicular to the bottom plate 72a. The side plate 72b functions as a partition separating the storage compartment 42 (or the right-side space 40R) from the battery unit 30. The side plate 72b prevents the worker from touching the battery unit 30. Furthermore, because the side plate 72b functions as a partition, there is no need to provide a separate partition between the storage compartment 42 and the battery unit 30. Note that the side plate 72b is an example of the first partition in this disclosure.

[0049] The fall prevention plate 72c is positioned perpendicular to the lower plate 72a along its edge. The presence of the fall prevention plate 72c prevents the tool bag 70 from falling. The fall prevention plate 72c may be formed by bending a portion of the flat plate that makes up the lower plate 72a.

[0050] The grease gun storage unit 66 is mounted at the rear of the housing chamber 42. A cylindrical grease gun 74 is stored vertically in the grease gun storage unit 66. Since the grease gun storage unit 66 only houses the grease gun 74 and does not require a large space, it can be placed in the housing chamber 42 (right-side space 40R). The grease gun 74 is an example of the tool of this disclosure.

[0051] The grease gun storage compartment 66 is located at the rear of the storage chamber 42, in the rear portion of the right-side space 40R where the width narrows towards the rear. In other words, the grease gun storage compartment 66 is located in the position where the width narrows towards the rear, and the available storage space is most limited. However, by storing the grease gun 74 vertically, the grease gun storage compartment 66 can be positioned in the most space-constrained location to accommodate the grease gun 74. The operator can access the grease gun storage compartment 66 through the gap between the side 65a and the mounting bracket 86.

[0052] The power supply unit 68 is located at the front of the storage compartment 42, directly below the tool bag storage compartment 64. The power supply unit 68 has a power supply port 84 that can be connected to a power supply cable 82 extending from an external power source 80 shown in Figure 4. In Figure 6, the power supply port 84 is shown with a power supply port cover 85 attached. The power supply unit 68 only requires the placement of the power supply port 84 and does not require a large space, so the power supply unit 68 can be placed in the storage compartment 42 (right side space 40R). The power supply cable 82 may be connected to the power supply port 84 when charging the battery unit 30, or it may be connected during operation. When the power supply cable 82 is connected during operation, the electric work machine 100 may be driven by the power supplied from the external power source 80, or a portion of the supplied power may be used to drive the electric work machine 100 and the remaining power may be supplied to the battery unit 30. The power supply cable 82 is an example of a power supply component in this disclosure.

[0053] The power supply port 84 is supported by a mounting bracket 86. The mounting bracket 86 is formed to surround the power supply port 84. The mounting bracket 86 also functions as a partition plate separating the housing chamber 42 from the battery unit 30. Therefore, there is no need to provide a separate partition plate between the housing chamber 42 and the battery unit 30. Note that the mounting bracket 86 is an example of the first partition plate of this disclosure.

[0054] Furthermore, the mounting bracket 86 is mounted so that its right end rests on the bumper 21b, thereby positioning the power supply port 84 closer to the right edge of the housing chamber 42. Consequently, for a worker who opens the housing chamber cover 46 and accesses the housing chamber 42, the power supply port 84 is positioned closer to the worker, at the right edge of the housing chamber 42, thereby improving the worker's accessibility to the power supply port 84. In addition, since the mounting bracket 86 housing the power supply port 84 is mounted in the front portion of the right-side space 40R where the left and right widths are approximately the same, the power supply port 84 is positioned closer to the worker than in the rear portion of the right-side space 40R, further improving the worker's accessibility to the power supply port 84.

[0055] By the way, when supplying power from an external power source 80 to the electric work machine 100, a power supply cable 82 is connected to the power supply port 84. When the storage chamber cover 46 of the storage chamber 42 is opened to connect the power supply cable 82 to the power supply port 84, parts of the storage chamber 42 other than the power supply port 84, specifically the tool bag storage section 64 and the grease gun storage section 66, are exposed to the outside. In this state, dust may enter the tool bag storage section 64 and the grease gun storage section 66. In addition, the possibility of losing the tool bag 70 and grease gun 74 stored in the storage chamber 42 increases.

[0056] In contrast, the housing chamber cover 46 is fitted with a power supply unit cover 52 that can be opened and closed to cover the power supply unit 68. The power supply unit cover 52 is attached to an opening 53 provided in the housing chamber cover 46, and when opened it connects the inner space and the outer space of the housing chamber cover 46, and when closed it shields the inner space and the outer space of the housing chamber cover 46. The power supply unit cover 52 may be made open and closed by rotating with its front end as a pivot point, or it may be made open and closed by rotating with its rear end as a pivot point. In this embodiment, the power supply unit cover 52 rotates with its rear end as a pivot point.

[0057] The power supply unit cover 52 is provided in the portion of the housing cover 46 corresponding to the mounting position of the power supply unit 68. That is, when the housing cover 46 is closed and viewed from a direction perpendicular to the housing cover 46, the power supply unit cover 52 is provided in a position where it overlaps with the power supply unit 68. The power supply unit cover 52 is provided in at least the portion of the power supply unit 68 corresponding to the mounting position of the power supply port 84. At this time, the power supply unit cover 52 is provided in a position enclosed by the housing cover 46. Therefore, when the housing cover 46 is closed, the power supply unit 68 is covered by the housing cover 46, but even when the housing cover 46 is closed, the power supply unit cover 52 can be opened and closed independently of the housing cover 46. When the power supply unit cover 52 is opened while the housing cover 46 is closed, only the portion corresponding to the mounting position of the power supply port 84 can be made to communicate with the outside.

[0058] As a result, even when the housing cover 46 is closed, by opening the power supply unit cover 52, an operator can access the power supply port 84 from the outside through the opening 53 of the housing cover 46 and connect the power supply cable 82 to the power supply port 84 through the opening 53 of the housing cover 46. For example, an operator can grasp the part of the power supply cable 82 near the socket from the outside and reach their hand into the housing 42 through the opening 53 of the housing cover 46 to access the part corresponding to the mounting position of the power supply port 84 and connect the socket of the power supply cable 82 to the power supply port 84. When the power supply cable 82 is connected to the power supply port 84, the part of the power supply cable 82 near the socket is located inside the housing 42, while the part of the power supply cable 82 further away from the socket remains outside the housing 42. At this time, because the housing cover 46 is closed, the part of the housing 42 other than the part corresponding to the mounting position of the power supply unit 68 is shielded from the outside. As a result, power can be supplied while parts of the storage chamber 42 other than the power supply unit 68 are covered by the storage chamber cover 46, thus preventing dust from entering the tool bag storage unit 64 and the grease gun storage unit 66 during power supply. In addition, the loss of the tool bag 70 and the grease gun 74 during power supply is prevented.

[0059] Figures 7 to 9 show the open and closed states of the housing chamber cover 46 and the power supply unit cover 52. In Figures 7 to 9, the upper row shows a view of the housing chamber 42 from above, and the lower row shows a right side view of the housing chamber 42. Figure 7 shows both the housing chamber cover 46 and the power supply unit cover 52 in a closed state. Figure 8 shows the housing chamber cover 46 open while the power supply unit cover 52 is closed. Figure 9 shows the housing chamber cover 46 closed while the power supply unit cover 52 is open.

[0060] As shown in Figure 7, when the housing chamber cover 46 and the power supply unit cover 52 are closed, the housing chamber 42 is covered by the housing chamber cover 46 and the power supply unit cover 52. When no power is supplied, the state is basically as shown in Figure 7.

[0061] As shown in Figure 8, when the storage chamber cover 46 is open, the storage chamber 42 is exposed to the outside. In this state, an operator can access the storage chamber 42 and, for example, take out or put in the tool bag 70 stored in the tool bag storage section 64, or take out or put in the grease gun 74 stored in the grease gun storage section 66.

[0062] As shown in Figure 9, when the power supply unit cover 52 is open, the power supply unit 68 is in communication with the outside, while other parts of the storage chamber 42 (tool bag storage unit 64 and grease gun storage unit 66) are covered by the storage chamber cover 46. In this state, the power supply cable 82 can be connected to the power supply port 84 through the opening 53 of the storage chamber cover 46. This allows power to be supplied without exposing the tool bag storage unit 64 and grease gun storage unit 66 to the outside.

[0063] Figure 10 is an enlarged view of the power supply unit 68. In Figure 10, a power supply port cover 85 is attached to the power supply port 84, preventing dust from entering the power supply port 84 when the power supply cable 82 is not connected. The power supply port cover 85 is connected to a retaining wire 88 to prevent it from falling. The power supply port 84 opens to the right in the left-right width direction of the swivel frame 20, and the power supply cable 82 can be connected to the power supply port 84 along a direction from the right side of the power supply port 84 toward the left.

[0064] An access section 90 is provided in front of the power supply port 84. The access section 90 is a space that allows an operator to reach into the mounting bracket 86 from the outside and operate the release device 98, which will be described later. The access section 90 has a communication hole 92, shown by a dashed line, that penetrates the mounting bracket 86 and connects the inside and outside of the mounting bracket 86. The communication hole 92 may be formed longitudinally along the vertical direction, as shown in Figure 10. Under normal conditions, the communication hole 92 is covered by an access section cover 94. The access section cover 94 is formed longitudinally to match the shape of the communication hole 92. Both longitudinal ends of the access section cover 94 are fixed to the mounting bracket 86 by screws 95. By removing the screws 95, the access section cover 94 can be removed from the mounting bracket 86, at which point the communication hole 92 is exposed, and an operator can access the inside of the mounting bracket 86 through the communication hole 92.

[0065] Figure 11 shows the internal structure of the mounting bracket 86. Inside the mounting bracket 86 is a connection mechanism 96 having a power supply port 84 connected to a power supply cable 82. The connection mechanism 96 is fitted with a release device 98 for manually releasing the connection between the power supply cable 82 and the power supply port 84. The release device 98 is a mechanism that forcibly releases the connection between the power supply cable 82 and the power supply port 84 when pushed by an operator in the direction indicated by the arrow in Figure 11.

[0066] The connection mechanism 96 incorporates a locking mechanism (not shown) that automatically locks the power supply cable 82 when it is connected to the power supply port 84. When the power supply cable 82 is connected, the locking mechanism drives an electric motor or solenoid mechanism (not shown) to switch the power supply cable 82 to a locked state. When switched to the locked state, the power supply cable 82 will not come off the power supply port 84 during power supply. The locking mechanism also drives an electric motor or solenoid mechanism to release the locked state when power supply ends.

[0067] Here, if the electric motor or solenoid mechanism fails, is disconnected, or the power supply is interrupted, the locking mechanism cannot be released, and the power supply cable 82 cannot be disconnected from the power supply port 84. To avoid this, a release device 98 is provided, and the connection between the power supply cable 82 and the power supply port 84 can be manually released by operating the release device 98.

[0068] When operating the release device 98, the operator removes the access cover 94 of the access section 90, then reaches their hand through the communication hole 92 to operate the release device 98. In connection with this, the communication hole 92 is sized so that the operator can reach their hand through the communication hole 92 and operate the release device 98.

[0069] Furthermore, the power supply unit cover 52 may be shaped to allow the housing chamber cover 46 to be opened and closed by a predetermined range while the power supply cable 82 is connected to the power supply port 84 through the opening 53 of the housing chamber cover 46. Figure 12 shows the housing chamber cover 46 in the open position with the power supply cable 82 connected to the connection mechanism 96. In Figure 12, the power supply unit cover 52 is rotatable with its rear end as the pivot point, but it may also be rotatable with its front end as the pivot point. Since the power supply cable 82 is used with a minimum bending radius or greater, as shown in Figure 12, it is in a straight line along the left-right width direction of the swivel frame 20 on the side of the connection mechanism 96.

[0070] As shown in Figure 12, with the power supply cable 82 connected to the power supply port 84 of the connection mechanism 96, the storage chamber cover 46 is opened by a predetermined angle θ. This predetermined angle θ is such that at least the worker can take out the tools stored in the storage chamber 42 (tools in the tool bag 70 and the grease gun 74).

[0071] In other words, the power supply unit cover 52 is shaped so that the housing chamber cover 46 can be opened by a predetermined angle θ while the power supply cable 82 is connected to the power supply port 84 of the connection mechanism 96 through the opening 53 of the housing chamber cover 46. For example, even if the housing chamber cover 46 is closed and only the power supply unit cover 52 is opened, and the power supply cable 82 is connected to the power supply port 84 through the opening 53 of the housing chamber cover 46, the housing chamber cover 46 can be opened by a predetermined angle θ, and the front end 54 of the opening 53 formed in the housing chamber cover 46 when the power supply unit cover 52 is opened is positioned so as not to interfere with the power supply cable 82.

[0072] The dashed line in Figure 12 shows the state in which the storage compartment cover 46 is closed. In this state, by increasing the front-to-back dimension L between the power supply cable 82 and the front end 54 of the opening 53, the predetermined angle θ in which the storage compartment cover 46 can be opened and closed can be increased. Therefore, by adjusting the position of the front end 54 of the opening 53, the storage compartment cover 46 can be opened to a extent that allows an operator to retrieve the tools stored in the storage compartment 42.

[0073] Furthermore, although not shown in the figures, the power supply port 84 may be configured to open to the right rear of the pivoting frame 20, and the power supply cable 82 may be connected to the power supply port 84 of the connection mechanism 96 through the opening 53 of the housing cover 46 in a direction from the right rear to the left front relative to the power supply port 84. This allows the predetermined angle θ that enables the housing cover 46 to be opened without interfering with the power supply cable 82, while the housing cover 46 is closed and only the power supply unit cover 52 is opened, connecting the power supply cable 82 to the power supply port 84 through the opening 53 of the housing cover 46. If the power supply unit cover 52 is rotatable with its front end as the pivot point, the power supply port 84 is configured to open to the right front of the pivot frame 20, and the power supply cable 82 is connected to the power supply port 84 of the connection mechanism 96 through the opening 53 of the housing chamber cover 46 in a direction from the right front to the left rear relative to the power supply port 84. This allows the predetermined angle θ that allows the housing chamber cover 46 to be opened without interfering with the power supply cable 82, while the housing chamber cover 46 is closed and only the power supply unit cover 52 is opened, connecting the power supply cable 82 to the power supply port 84 through the opening 53 of the housing chamber cover 46.

[0074] [Second Embodiment] Figure 13 shows the states of the housing chamber cover 110, which covers the housing chamber 42 in an openable and closable manner, and the power supply unit cover 112, which covers the power supply unit 68 in an openable and closable manner, corresponding to the second embodiment. The figures show the housing chamber cover 110 and the power supply unit cover 112 viewed from above. Note that parts other than the structure of the housing chamber cover 110 and the power supply unit cover 112 are the same as those of the first embodiment described above, so their description is omitted.

[0075] Figure 13(a) shows the state in which the housing chamber cover 110 and the power supply unit cover 112 are closed, Figure 13(b) shows the state in which only the housing chamber cover 110 is open, and Figure 13(c) shows the state in which only the power supply unit cover 112 is open.

[0076] In the second embodiment, as in the first embodiment, the power supply unit cover 112 is provided in a location on the housing chamber cover 110 corresponding to the mounting position of the power supply unit 68. That is, when the housing chamber cover 110 is closed and viewed from a direction perpendicular to the housing chamber cover 110, the power supply unit cover 112 is provided in a position that overlaps with the power supply unit 68. At this time, the power supply unit cover 112 is provided in a position enclosed by the housing chamber cover 110. On the other hand, in the second embodiment, the housing chamber cover 110 and the power supply unit cover 112 are provided as separate components. Specifically, both the housing chamber cover 110 and the power supply unit cover 112 are individually attached to the upper rotating body 2. Therefore, the housing chamber cover 110 and the power supply unit cover 112 can be opened and closed individually.

[0077] As shown in Figure 13(a), when the housing chamber cover 110 and the power supply unit cover 112 are closed, the housing chamber cover 110 and the power supply unit cover 112 are flush with the outer wall 13, that is, aligned on the same plane.

[0078] As shown in Figure 13(b), when the storage chamber cover 110 is open, the power supply unit cover 112 is held by the upper rotating body 2, and the power supply unit 68 is covered by the power supply unit cover 112. At this time, the parts of the storage chamber 42 other than the power supply unit 68 are in communication with the outside, and the worker can take in and out the tool bag 70 and grease gun 74 stored in the storage chamber 42.

[0079] As shown in Figure 13(c), when the power supply unit cover 112 is open, the power supply unit 68 is in communication with the outside, and the power supply cable 82 can be connected to the power supply port 84 of the power supply unit 68. At this time, the parts of the housing chamber 42 other than the power supply unit 68 are covered by the housing chamber cover 110, preventing dust from entering those parts. In addition, the loss of the tool bag 70 and grease gun 74 stored in the housing chamber 42 is also suppressed.

[0080] As described above, the first and second embodiments have been presented as examples of the technology disclosed in this application. However, the technology in this disclosure is not limited thereto and can be applied to embodiments that have been modified, replaced, added, or omitted. Furthermore, it is possible to combine the components described in the above-mentioned embodiments to create new embodiments. Therefore, examples of modifications are given below.

[0081] [Differentiation] In the above embodiment, the housing chamber 42 was located in the right-side space 40R, which is located to the right of the battery unit 30, but the disclosure is not limited thereto. For example, the housing chamber 42 may be located in the left-side space 40L, which is located to the left of the battery unit 30. Accordingly, the housing chamber cover and the power supply unit cover are located on the outer wall covering the left-side space 40L. Alternatively, the housing chamber 42 may be located in the space behind the battery unit 30. Accordingly, the housing chamber cover and the power supply unit cover are located on the outer wall covering the rear of the battery unit 30. Alternatively, the housing chamber 42 may be located in the motor housing. Accordingly, the housing chamber cover and the power supply unit cover are located on the outer wall covering the motor housing. In other words, the location of the housing chamber may be changed as appropriate, as long as there is a part in which the housing chamber 42 can be located.

[0082] In the above embodiment, the electric work machine 100 is driven by power charged in the battery unit 30, but the disclosure is not limited thereto. Specifically, the electric work machine of the disclosure may be a hybrid type of work machine driven by power from the battery unit 30 and an engine. Alternatively, the electric work machine may be a combined type of work machine that uses power from the battery unit 30 and power generated by a fuel cell as energy sources.

[0083] The relative positions of the tool bag storage unit 64, the grease gun storage unit 66, and the power supply unit 68 in the above embodiment are examples only, and this disclosure is not limited to the above embodiment. For example, the tool bag storage unit 64, the grease gun storage unit 66, and the power supply unit 68 may be arranged side by side in the vertical direction. Alternatively, the tool bag storage unit 64, the grease gun storage unit 66, and the power supply unit 68 may be arranged side by side in the horizontal direction. In other words, the relative positions may be changed as appropriate, as long as the tool bag storage unit 64, the grease gun storage unit 66, and the power supply unit 68 can be accommodated in the storage chamber 42. Depending on the position of the power supply unit 68, the power supply unit cover 52 is appropriately changed to a position corresponding to the mounting position of the power supply unit 68 relative to the storage chamber cover 46.

[0084] In the above embodiment, the storage chamber 42 contained a tool bag storage section 64, a grease gun storage section 66, and a power supply section 68. However, the embodiment may be carried out by omitting either the tool bag storage section 64 or the grease gun storage section 66.

[0085] In the above embodiment, when the housing chamber cover 46 is closed and viewed from a direction perpendicular to the housing chamber cover 46, the power supply unit cover 52 is positioned within the housing chamber cover 46. However, the disclosure is not limited to this. That is, the power supply unit cover 52 does not have to be completely enclosed by the housing chamber cover 46. Specifically, the power supply unit cover 52 may be positioned such that a part of the edge of the power supply unit cover 52 becomes a part of the edge of the housing chamber cover 46. Similarly, with respect to the housing chamber cover 110 and the power supply unit cover 112, the power supply unit cover 112 does not have to be completely enclosed by the housing chamber cover 110.

[0086] In the above embodiment, the lower traveling body 1 was capable of movement, but the portion that supports the upper rotating body 2 in a rotatable manner is not limited to a mode of movement. For example, the lower body that supports the upper rotating body 2 in a rotatable manner may be composed of a structure such as a support base that is not capable of self-propulsion. [Explanation of symbols]

[0087] 20: Turning frame (aircraft frame) 30: Battery Unit 32: Electric motor 40R: Right side space (side space) 41: Inverter (battery-related equipment) 42: Confinement Room 44: Battery-related equipment storage room 45: Motor housing 46: Containment chamber cover 47: Partition (Third partition) 50: Partition plate (Second partition plate) 52: Power supply unit cover 68: Power supply unit 70: Tool bag (tools) 72: Mounting platform 72a: Side panel (first partition panel) 74: Grease gun (tool) 80: External power supply 82: Power supply cable (power supply component) 84: Power supply port 86: Mounting bracket (first partition plate) 90: Access section 98: Release device 100: Electric work machinery 110: Containment chamber cover 112: Power supply unit cover

Claims

1. A storage room capable of accommodating tools, A storage chamber cover that can be opened and closed, A power supply unit having a power supply port that can be connected to a power supply component extending from an external power supply, The power supply unit includes a power supply unit cover that can be opened and closed, The power supply unit is mounted in the housing chamber, The power supply unit cover is provided in the portion of the housing chamber cover corresponding to the mounting position of the power supply unit, in an electrically powered work machine.

2. An electric work machine according to claim 1, A battery unit is positioned adjacent to the aforementioned storage chamber, An electric work machine further comprising a first partition plate that separates the housing chamber and the battery unit.

3. An electric work machine according to claim 2, The aforementioned battery unit is located at the rear of the aircraft frame. The first partition plate separates the lateral space located to the side of the battery unit from the battery unit itself. The aforementioned containment chamber is an electrically operated work machine located in the lateral space.

4. An electric work machine according to claim 1, A battery-related equipment housing room, which houses battery-related equipment, is located adjacent to the aforementioned housing room. An electric work machine further comprising a second partition plate separating the aforementioned storage chamber from the battery-related equipment storage chamber.

5. An electric work machine according to claim 2, A motor housing is located adjacent to the aforementioned housing chamber and houses an electric motor that is driven by power supplied from the battery unit, An electric work machine further comprising a third partition plate separating the aforementioned housing chamber and the motor housing chamber.

6. An electric work machine according to claim 1, The aforementioned storage chamber is an electric work machine having a mounting platform on which the aforementioned tools can be mounted.

7. An electric work machine according to claim 1, The aforementioned power supply unit is A release device for disconnecting the power supply component and the power supply port, An electric work machine further comprising an access section which is a space that enables operation of the release device.

8. An electric work machine according to claim 1, The power supply unit cover is shaped to be openable and closable to the extent that the storage chamber cover can be opened and closed to the extent that the tool stored in the storage chamber can be removed while the power supply component is connected to the power supply port, in an electrically powered work machine.

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