electric excavator

Abstract

To improve safety.SOLUTION: An electric shovel includes: an electric motor; a battery that supplies power to the electric motor; a plurality of charging ports that supplies power to the battery; and a plurality of openable / closable cover members that covers the plurality of charging ports. When one of the plurality of cover members is in an open state, at least a part of a configuration of one of the cover members in the open state is configured to be within a range of movement when the other cover member is opened.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present disclosure relates to an electric excavator.

Background Art

[0002] In recent years, an electric-driven excavator having an electric motor that operates a hydraulic drive system has been proposed. In the electric-driven excavator, the electric motor is driven by electric power supplied from a battery provided in the main body.

[0003] The electric-driven excavator tends to be provided with an inlet (charging port) for normal charging and an inlet for rapid charging. Since it is difficult to perform normal charging and rapid charging simultaneously, in the technique described in Patent Document 1, an inlet for normal charging and an inlet for rapid charging are provided so that a normal charging connector and a rapid charging connector cannot be connected simultaneously.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the technique described in Patent Document 1, consideration has not been given to suppressing the intrusion of dust and water into each of the inlet for normal charging and the inlet for rapid charging.

[0006] Therefore, in view of the above problems, when one of the plurality of inlets is connected to a charging connector, by preventing any other inlet of the plurality of inlets from being exposed, it is possible to suppress the connection of a power supply connector to the other inlet and to suppress the intrusion of dust or dirt into the other inlet, and the purpose is to improve safety. [Means for solving the problem]

[0007] To achieve the above objective, an electric excavator according to one embodiment of the present disclosure includes an electric motor, a battery that supplies power to the electric motor, a plurality of charging ports that supply power to the battery, and a plurality of openable and closable cover members that cover each of the plurality of charging ports, wherein when one of the plurality of cover members is opened, at least a portion of the components of the open cover member is located within the range that moves when opening the other cover member of the plurality of cover members. The plurality of charging ports are arranged in close proximity, each of the plurality of cover members is provided with a rotation axis that serves as a reference for rotational movement, the plurality of rotation axes are provided between the plurality of charging ports, the rotation axis of one cover member is positioned closer to the charging port covered by the other cover member compared to the rotation axis of the other cover member, and the rotation axis of the other cover member is positioned closer to the charging port covered by the one cover member compared to the rotation axis of the one cover member. . An electric excavator according to one embodiment of the present disclosure includes an electric motor, a battery that supplies power to the electric motor, a plurality of charging ports that supply power to the battery, and a plurality of openable and closable cover members that cover each of the plurality of charging ports, wherein when one of the plurality of cover members is opened, at least a portion of the configuration of the open cover member is located within the range that moves when opening the other cover member, the plurality of charging ports are arranged in close proximity, each of the plurality of cover members is provided with a rotating shaft that serves as a reference for rotational movement, the plurality of rotating shafts are provided between the plurality of charging ports, each of the plurality of cover members has a projection on the surface opposite to the surface that contacts the charging port, and when one of the cover members is opened with respect to the rotating shaft, the projection of the one cover member is located within the range that moves when opening the other cover member. [Effects of the Invention]

[0008] According to the above embodiment, safety is improved by preventing a charging component from being connected to each of the multiple charging ports simultaneously, and by covering the charging ports to which no charging component is connected with a cover component. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1 is a side view showing a shovel (excavator) according to an embodiment. [Figure 2] Figure 2 is a schematic block diagram showing an example of the configuration of an excavator according to this embodiment. [Figure 3] Figure 3 is a top view showing an example of the arrangement structure of various devices in the upper rotating body according to the embodiment. [Figure 4] Figure 4 is an explanatory diagram illustrating the opening and closing of the outer flap provided on the upper rotating body of the shovel according to this embodiment. [Figure 5] Figure 5 is a diagram showing the arrangement relationship between multiple inner flaps and vehicle inlets according to the embodiment. [Figure 6] Figure 6 is a diagram illustrating the transition between the open and closed states of the first inner flap and the second inner flap according to the embodiment. [Figure 7]Figure 7 illustrates the transition between opening and closing the first inner flap and the second inner flap according to Modification Example 1. [Figure 8] Figure 8 shows the arrangement of multiple inner flaps according to Modification Example 2. [Figure 9] Figure 9 illustrates the transition between the open and closed states of the first inner flap and the second inner flap according to Modification Example 2. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings. Furthermore, the embodiments described below are illustrative and not limiting to the invention, and not all features or combinations thereof described in the embodiments are necessarily essential to the invention. In addition, identical or corresponding components in each drawing are denoted by the same or corresponding reference numerals, and their descriptions may be omitted.

[0011] (First Embodiment) First, as an example of an electric excavator, an overview of the excavator 200 according to the first embodiment will be described.

[0012] [Shovel Overview] As shown in Figure 1, the excavator 200 according to this embodiment comprises a lower traveling body 1, an upper rotating body 3 mounted on the lower traveling body 1 so as to be rotatable via a slewing mechanism 2, a boom 4, an arm 5, and a bucket 6 as attachments, and a cabin 10.

[0013] The lower traveling body 1 includes, for example, a pair of left and right crawlers, and each crawler is hydraulically driven by a travel hydraulic motor 1R, 1L (see Figure 2), allowing it to move under its own power.

[0014] The upper revolving body 3 is hydraulically driven by a slewing hydraulic motor 2M (see FIG. 2) through a slewing mechanism 2 to revolve with respect to the lower traveling body 1. All driven elements (for example, the slewing hydraulic motor 2M) are hydraulically driven by hydraulic oil supplied from a main pump 14 (see FIG. 2). This corresponds to a configuration in which the power source (engine) of a so-called hydraulic excavator is replaced with a pump motor 12.

[0015] Alternatively, the upper revolving body 3 may be electrically driven by a slewing electric motor that is driven by electric power supplied from a battery module 19 through the slewing mechanism 2 instead of the slewing hydraulic motor 2M. In this case, for example, the excavator 200 is connected from the battery module 19 to the slewing electric motor via a power conversion device 100 and an inverter. Then, the slewing electric motor may perform a power running operation of slewingly driving the upper revolving body 3 and a regeneration operation of generating regenerative electric power to slewingly brake the upper revolving body 3 under the control of an excavator controller 30 and the inverter. Further, the slewing electric motor may supply regenerative electric power to the battery module 19 or the pump motor 12 via the inverter.

[0016] The boom 4 is attached to the front center of the upper revolving body 3 so as to be able to pitch. An arm 5 is attached to the tip of the boom 4 so as to be able to swing vertically, and a bucket 6 is attached to the tip of the arm 5 so as to be able to swing vertically. The boom 4, the arm 5, and the bucket 6 are each hydraulically driven by a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9 as hydraulic actuators.

[0017] An outer flap 150 (an example of an outer cover member) is provided behind the left side surface of the upper revolving body 3. The outer flap 150 can be opened and closed, and a vehicle inlet for charging (an example of a charging port) for charging the excavator 200 and the like are provided in the internal space when the outer flap 150 is opened.

[0018] Bucket 6 is an example of an end attachment, and other end attachments may be attached to the tip of the arm 5 in place of bucket 6, depending on the work to be done. Other end attachments may be different types of buckets from bucket 6, such as slope buckets or dredging buckets. Other end attachments may also be different types of end attachments from buckets, such as breakers, agitators, or grapples.

[0019] The cabin 10 is mounted on the front left side of the upper rotating body 3, and its interior (room) is equipped with a cockpit where the operator sits, as well as control devices 26 (see Figure 2), which will be described later.

[0020] The shovel 200 operates its driven elements, such as the lower travel body 1 (left and right crawlers), upper slewing body 3, boom 4, arm 5, and bucket 6, in response to the operation of the operator seated in the cabin 10.

[0021] Furthermore, instead of being configured to be operable by an operator in the cabin 10, or in addition to being configured to be remotely operated from outside the shovel 200, it may also be configured to be remotely operated. When the shovel 200 is remotely operated, the cabin 10 may be unoccupied. The following explanation will proceed on the premise that operator operation includes at least one of operation of the operator's control device 26 in the cabin 10 and remote operation by an external operator.

[0022] Remote operation includes, for example, a mode in which the shovel 200 is operated by operation inputs related to the actuator of the shovel 200 performed by a predetermined external device. In this case, the shovel 200 may be equipped with a communication device (not shown) capable of communicating with a predetermined external device, and may transmit image information (captured image) output by an imaging device (not shown) to the external device. The external device may then display the received image information (captured image) on a display device (hereinafter, "remote operation display device") provided on its own device. In addition, various information images (information screens) displayed on the output device 50 (display device) inside the cabin 10 of the shovel 200 may also be displayed on the remote operation display device of the external device. This allows the operator of the external device to remotely operate the shovel 200 while checking the display contents, such as captured images and information screens showing the surroundings of the shovel 200, displayed on the remote operation display device. The shovel 200 may then operate a hydraulic actuator in response to a remote control signal, which is received from an external device via a communication device and represents the content of the remote control, thereby driving the driven elements such as the lower traveling body 1 (left and right crawlers), the upper slewing body 3, the boom 4, the arm 5, and the bucket 6.

[0023] Furthermore, remote operation may include, for example, a mode in which the shovel 200 is operated by external voice input or gesture input from people (e.g., workers) in the vicinity of the shovel 200. Specifically, the shovel 200 recognizes voices spoken by surrounding workers or gestures made by workers through a voice input device (e.g., microphone) or gesture input device (e.g., imaging device) mounted on the shovel 200 (itself). The shovel 200 may then operate actuators according to the content of the recognized voices or gestures to drive driven elements such as the lower traveling body 1 (left and right crawlers), the upper slewing body 3, the boom 4, the arm 5, and the bucket 6.

[0024] Furthermore, the shovel 200 may operate its actuators automatically, regardless of the operator's actions. This enables the shovel 200 to automatically operate at least some of its driven elements, such as the lower traveling body 1 (crawler 1CL, 1CR), upper slewing body 3, boom 4, arm 5, and bucket 6 (a so-called "automatic driving function" or "machine control function").

[0025] The automatic driving function may include a function that automatically operates driven elements (actuators) other than the target driven element (hydraulic actuator) in response to the operator's operation device 26 or remote operation (a so-called "semi-automatic driving function"). The automatic driving function may also include a function that automatically operates at least some of the multiple driven elements (actuators) on the premise that there is no operator operation device 26 or remote operation (a so-called "fully automatic driving function"). In the case of the shovel 200, if the fully automatic driving function is enabled, the interior of the cabin 10 may be unoccupied. Furthermore, the semi-automatic driving function and fully automatic driving function may include a mode in which the operation content of the driven elements (actuators) subject to automatic driving is automatically determined according to predetermined rules. Furthermore, the semi-automatic driving function and fully automatic driving function may also include a mode in which the shovel 200 autonomously makes various judgments, and the operation content of the driven elements (actuators) subject to automatic driving is autonomously determined according to the results of those judgments (a so-called "autonomous driving function").

[0026] [Shovel configuration] Next, with reference to Figure 1 and Figure 2, the configuration of the shovel 200 according to this embodiment will be described.

[0027] Figure 2 is a schematic block diagram showing an example of the configuration of the shovel 200 according to this embodiment.

[0028] In Figure 2, mechanical power lines are shown as double lines, hydraulic lines as thick solid lines, pilot lines as dashed lines, and electric drive / control lines as thin solid lines.

[0029] <Hydraulic drive system> The hydraulic drive system of the excavator 200 according to this embodiment includes hydraulic travel motors 1R and 1L, a swing hydraulic motor 2M, a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9, which hydraulically drive each of the driven elements such as the lower traveling body 1, boom 4, arm 5, and bucket 6. The hydraulic drive system of the excavator 200 according to this embodiment also includes a pump motor 12, a main pump 14, and a control valve 17.

[0030] The pump motor 12 (an example of a motor) is the power source for the hydraulic drive system. The pump motor 12 is, for example, an IPM (Interior Permanent Magnet) motor. The pump motor 12 is connected to a high-voltage power supply including a battery module 19 and a power converter 100 via an inverter 18. The pump motor 12 is powered by three-phase AC power supplied from the battery module 19 via the inverter 18 and drives the main pump 14 and the pilot pump 15. The drive control of the pump motor 12 may be performed by the inverter 18 under the control of the shovel controller 30, which will be described later.

[0031] The main pump 14 draws hydraulic fluid from the hydraulic fluid tank T and discharges it into the high-pressure hydraulic line 16, thereby supplying hydraulic fluid to the control valve 17 through the high-pressure hydraulic line 16. The main pump 14 is driven by a pump motor 12. The main pump 14 is, for example, a variable displacement hydraulic pump, and under the control of the shovel controller 30 (described later), a regulator (not shown) controls the angle (tilt angle) of the swash plate. This allows the main pump 14 to adjust the piston stroke length and thus adjust the discharge flow rate (discharge pressure).

[0032] The main pump 14 may be driven by power from another power source in addition to the electric motor 12 for the pump. For example, the energy of the hydraulic fluid discharged from the boom cylinder 7 and arm cylinder 8 to the hydraulic fluid tank due to the weight of the boom 4 and arm 5 when the boom 4 is lowered or the arm 5 is closed may be regenerated to drive the main pump 14. Specifically, the energy of the hydraulic fluid discharged from the boom cylinder 7 and arm cylinder 8 to the hydraulic fluid tank due to the weight of the boom 4 and arm 5 when the boom 4 is lowered or the arm 5 is closed may be used to drive a hydraulic motor arranged coaxially with the rotation axis of the main pump 14. Alternatively, the energy of the hydraulic fluid discharged from the boom cylinder 7 and arm cylinder 8 to the hydraulic fluid tank due to the weight of the boom 4 and arm 5 when the boom 4 is lowered or the arm 5 is closed may be regenerated to power a generator. Specifically, when the boom 4 is lowered or the arm 5 is closed, the energy of the hydraulic fluid discharged from the boom cylinder 7 and arm cylinder 8 into the hydraulic fluid tank due to the weight of the boom 4 and arm 5 can be used to drive a hydraulic motor arranged coaxially with the generator, thereby causing the generator to produce electricity. In this case, the power generated by the generator may be supplied to the pump motor 12 or used to charge the battery module 19.

[0033] The control valve 17 is a hydraulic control device that controls the hydraulic drive system in response to operator commands or automatic driving functions. As described above, the control valve 17 is connected to the main pump 14 via the high-pressure hydraulic line 16 and is configured to selectively supply hydraulic fluid from the main pump 14 to the hydraulic actuators (travel hydraulic motors 1R, 1L, swing hydraulic motor 2M, boom cylinder 7, arm cylinder 8, and bucket cylinder 9). For example, the control valve 17 is a valve unit that includes multiple control valves (directional control valves) that control the flow rate and direction of the hydraulic fluid supplied from the main pump 14 to each of the hydraulic actuators. The hydraulic fluid supplied from the main pump 14 and that has passed through the control valve 17 and hydraulic actuators is discharged from the control valve 17 to the hydraulic fluid tank T.

[0034] <Electric drive system> The electric drive system of the shovel 200 according to this embodiment includes a pump motor 12, a sensor 12s, and an inverter 18. The electric drive system of the shovel 200 according to this embodiment also includes a high-voltage power supply consisting of a battery module 19 and a power converter 100, etc.

[0035] Sensor 12s includes a current sensor 12s1, a voltage sensor 12s2, and a rotational state sensor 12s3.

[0036] The current sensor 12s1 detects the current of each of the three phases (U phase, V phase, and W phase) of the pump motor 12. The current sensor 12s1 is installed, for example, in the power path between the pump motor 12 and the inverter 18. The detection signals corresponding to each of the three phases of the pump motor 12 detected by the current sensor 12s1 are directly received by the inverter 18 via a communication line. Alternatively, these detection signals may be received by the shovel controller 30 via a communication line and input to the inverter 18 via the shovel controller 30.

[0037] The voltage sensor 12s2 detects the applied voltage to each of the three phases of the pump motor 12. The voltage sensor 12s2 is installed, for example, in the power path between the pump motor 12 and the inverter 18. The detection signals corresponding to the applied voltages of each of the three phases of the pump motor 12 detected by the voltage sensor 12s2 are directly received by the inverter 18 via a communication line. Alternatively, these detection signals may be received by the shovel controller 30 via a communication line and input to the inverter 18 via the shovel controller 30.

[0038] The rotational state sensor 12s3 detects the rotational state of the pump motor 12 (e.g., rotational position (rotation angle), rotational speed, etc.). The rotational state sensor 12s3 is, for example, a rotary encoder or a resolver.

[0039] The inverter 18 drives the pump motor 12 under the control of the shovel controller 30. The inverter 18 includes, for example, a conversion circuit that converts DC power to three-phase AC power and three-phase AC power to DC power, a drive circuit that switches and drives the conversion circuit, and a control circuit that outputs a control signal (for example, a PWM (Pulse Width Modulation) signal) that defines the operation of the drive circuit.

[0040] The control circuit of the inverter 18 controls the drive of the pump motor 12 while understanding its operating state. For example, the control circuit of the inverter 18 understands the operating state of the pump motor 12 based on the detection signal of the rotation state sensor 12s3. Alternatively, the control circuit of the inverter 18 may understand the operating state of the pump motor 12 by sequentially estimating the rotation angle of the rotation shaft of the pump motor 12 based on the detection signal of the current sensor 12s1 and the detection signal of the voltage sensor 12s2 (or the voltage command value generated during the control process).

[0041] Furthermore, at least one of the drive circuit and control circuit of the inverter 18 may be provided outside the inverter 18.

[0042] The battery module 19 is configured to supply charged power to the electronic components within the shovel 200. The specific configuration will be described later.

[0043] The power converter 100 either boosts the power to the battery module 19 or reduces the power from the pump motor 12 via the inverter 18 and stores it in the battery module 19. The power converter 100 switches between boosting and bucking operations depending on the operating state of the pump motor 12 so that the voltage value of the DC (Direct Current) bus 110 stays within a certain range. The switching control between the boosting and bucking operations of the power converter 100 may be performed by the shovel controller 30, for example, based on the voltage detection value of the DC bus 110, the voltage detection value of the battery module 19, and the current detection value of the battery module 19.

[0044] Furthermore, if it is not necessary to boost the output voltage of the battery module 19 and apply it to the pump motor 12, the power converter 100 may be omitted.

[0045] <Operation system> The operating system of the shovel 200 according to this embodiment includes a pilot pump 15, an operating device 26, and a pressure control valve 31.

[0046] The pilot pump 15 supplies pilot pressure to various hydraulic devices (e.g., pressure control valve 31) mounted on the shovel 200 via the pilot line 25. This allows the pressure control valve 31 to supply pilot pressure to the control valve 17 according to the operation of the operating device 26 (e.g., operating amount and direction) under the control of the shovel controller 30. Therefore, the shovel controller 30 and the pressure control valve 31 can realize the operation of the driven element (hydraulic actuator) according to the operation of the operating device 26 by the operator. Furthermore, the pressure control valve 31 can supply pilot pressure to the control valve 17 according to the remote operation content specified by the remote operation signal under the control of the shovel controller 30. The pilot pump 15 is, for example, a fixed-displacement hydraulic pump and is driven by the pump motor 12 as described above.

[0047] The control device 26 is located within reach of the operator in the cockpit of the cabin 10 and is used by the operator to operate each of the driven elements (i.e., the left and right crawlers of the lower traveling body 1, the upper slewing body 3, the boom 4, the arm 5, and the bucket 6, etc.). In other words, the control device 26 is used by the operator to operate the hydraulic actuators (e.g., travel hydraulic motors 1R, 1L, slewing hydraulic motor 2M, boom cylinder 7, arm cylinder 8, and bucket cylinder 9, etc.) or electric actuators that drive each of the driven elements. The control device 26 is, for example, electrically operated and outputs an electrical signal (hereinafter referred to as "operation signal") corresponding to the operator's operation. The operation signal output from the control device 26 is taken up by the shovel controller 30 via the signal line 28. As a result, the shovel controller 30 controls the pressure control valve 31 and controls the operation of the driven elements (actuators) of the shovel 200 in accordance with the operator's operation and operation commands corresponding to the automatic driving function.

[0048] The operating device 26 includes, for example, levers 26A to 26C. Lever 26A may be configured to accept operations on the arm 5 (arm cylinder 8) and the upper slewing body 3 (slewing motion) in response to forward / backward and left / right movements, respectively. Lever 26B may be configured to accept operations on the boom 4 (boom cylinder 7) and the bucket 6 (bucket cylinder 9) in response to forward / backward and left / right movements, respectively. Lever 26C may be configured to accept operations on the lower traveling body 1 (crawler), for example.

[0049] Furthermore, if the control valve 17 is composed of an electromagnetic pilot-operated control valve (directional control valve), the operating signal from the electric operating device 26 may be directly input to the control valve 17, and each hydraulic control valve may perform an operation according to the operation of the operating device 26. Alternatively, the operating device 26 may be a hydraulic pilot type that outputs a pilot pressure according to the operation. In this case, the pilot pressure according to the operation is supplied to the control valve 17.

[0050] The pressure control valve 31 outputs a predetermined pilot pressure using hydraulic fluid supplied from the pilot pump 15 through the pilot line 25 under the control of the shovel controller 30. The pilot line on the secondary side of the pressure control valve 31 is connected to the control valve 17, and the pilot pressure output from the pressure control valve 31 is supplied to the control valve 17.

[0051] <Power system> Shovel 200 includes a vehicle inlet 101 for normal charging and a vehicle inlet 102 for rapid charging as a configuration for charging the battery module 19.

[0052] The vehicle inlet 101 for normal charging is configured to be connectable to a charging connector (an example of a charging component) provided at the tip of a predetermined cable (hereinafter referred to as the "charging cable") of an external power supply.

[0053] The AC-DC converter 103 for charging converts AC power supplied from an external power source via the vehicle inlet 101 for normal charging into DC power that can be used to charge the battery 192, and supplies it to the battery module 19.

[0054] The rapid charging vehicle inlet 102 is configured to be connectable to a charging connector (an example of a charging component) provided at the end of a charging cable of an external power source (e.g., a charging station). The rapid charging vehicle inlet 102 is, for example, an inlet for performing rapid charging based on CHAdeMO®. In this embodiment, by using such a DC charging method, DC power can be supplied to the battery module 19 without going through an AC-DC converter.

[0055] The battery module 19 of the excavator 200 according to this embodiment supplies power to each component within the excavator 200. The battery module 19 includes a battery 192 and a battery controller 191.

[0056] The battery 192 supplies power to various components within the shovel 200. For example, the battery 192 supplies charged (stored) power to the pump motor 12. The battery 192 also charges the power generated (regenerative power) of the pump motor 12.

[0057] Battery 192 is charged (stored) by being connected to an external power source via a charging cable.

[0058] Battery 192 is, for example, a lithium-ion battery and has a relatively high output voltage (e.g., several hundred volts).

[0059] The battery controller 191 (an example of a control unit) controls the internal configuration of the battery module 19. For example, the battery controller 191 monitors the temperature status of the battery 192 from the output of a temperature sensor (not shown) and calculates the State of Charge (SOC) of the battery 192. The battery controller 191 then outputs the temperature sensor detection result and the SOC to the shovel controller 30. As a result, the shovel controller 30 can display the temperature of the battery 192 and the SOC of the battery 192 on the output device 50 (display device) inside the cabin 10.

[0060] In this embodiment, the battery controller 191 determines whether or not the vehicle is in a state where it can be charged, depending on whether or not a charging connector is connected to the vehicle inlet 101 for normal charging or the vehicle inlet 102 for rapid charging. However, this embodiment is not limited to determining whether or not power can be supplied based on whether or not a charging connector is connected.

[0061] The battery controller 191 then communicates with the charging equipment that has an external power source (e.g., a charging station) when it determines that it is connected to an external power source via a charging cable and charging connector (in other words, when it determines that it is in a state where power can be supplied). The battery controller 191 then communicates with the charging equipment and, if the charging equipment authorizes the supply of power, it starts supplying power from the external power source.

[0062] <Control System> The control system for the shovel 200 according to this embodiment includes a shovel controller 30, an output device 50, and an input device 52.

[0063] The output device 50 is located inside the cabin 10 and outputs various information to the operator under the control of the shovel controller 30. The output device 50 includes, for example, a display device that outputs (notifies) information to the operator in a visual manner. The display device may be, for example, installed in a location easily visible to the operator inside the cabin 10 and displaying various information images under the control of the shovel controller 30. The display device may be, for example, a liquid crystal display or an organic EL (electroluminescence) display. The output device 50 also includes, for example, a sound output device that outputs information to the operator in an auditory manner. The sound output device may be, for example, a buzzer or a speaker.

[0064] The input device 52 is located inside the cabin 10 and receives various inputs from the operator. The input device 52 may include, for example, an operation input device that receives operation inputs from the operator. The operation input device includes, for example, buttons, toggles, levers, touch panels, touch pads, etc. The input device 52 may also include, for example, an audio input device that receives voice inputs from the operator and a gesture input device that receives gesture inputs from the operator. The audio input device includes, for example, a microphone that acquires the voice of the operator inside the cabin 10. The gesture input device includes, for example, an indoor camera capable of capturing images of the operator's gestures inside the cabin 10. Signals corresponding to the operator inputs received by the input device 52 are taken up by the shovel controller 30.

[0065] The shovel controller 30 may implement each function using any hardware, or any combination of hardware and software. For example, the shovel controller 30 may be centered around a computer that includes a processor such as a CPU (Central Processing Unit), a memory device (main memory) such as RAM (Random Access Memory), a non-volatile auxiliary storage device such as ROM (Read Only Memory), and an interface device for input / output with the outside.

[0066] The shovel controller 30 controls the drive of the shovel 200. For example, the shovel controller 30 outputs a control command to the pressure control valve 31 in response to an operation signal input from the operating device 26, and the pressure control valve 31 outputs a pilot pressure corresponding to the operation of the operating device 26. In this way, the shovel controller 30 can realize the operation of the driven elements (hydraulic actuators) of the shovel 200 that correspond to the operation of the electric operating device 26.

[0067] Furthermore, if the shovel 200 is remotely controlled, the shovel controller 30 may, for example, perform control related to the remote operation. Specifically, the shovel controller 30 may output a control command to the pressure control valve 31, causing the pressure control valve 31 to output a pilot pressure corresponding to the content of the remote operation. This enables the shovel controller 30 to realize the operation of the shovel 200 (driven element) corresponding to the content of the remote operation.

[0068] Furthermore, the shovel controller 30 may also perform control related to the automatic driving function, for example. Specifically, the shovel controller 30 may output a control command to the pressure control valve 31 and apply a pilot pressure corresponding to the operation command for the automatic driving function from the pressure control valve 31 to the control valve 17. In this way, the shovel controller 30 can realize the operation of the driven elements (hydraulic actuators) of the shovel 200 that correspond to the automatic driving function.

[0069] The shovel controller 30 may comprehensively control the operation of the entire shovel 200 (various devices mounted on the shovel 200).

[0070] The shovel controller 30 performs drive control of the electric drive system based on various input information (for example, control commands including the operation signals of the operating device 26).

[0071] Furthermore, the shovel controller 30 may, for example, drive the power converter 100 based on the operating state of the operating device 26 and control the switching between boost and buck operation of the power converter 100, in other words, between the discharge state and the charge state of the battery module 19. Also, if the shovel 200 is remotely operated, for example, the shovel controller 30 may drive the power converter 100 based on the content of the remote operation and control the switching between the discharge state and the charge state of the battery module 19. Furthermore, if the automatic operation function of the shovel 200 is enabled, the shovel controller 30 may drive the power converter 100 based on the operation command corresponding to the automatic operation function and control the switching between the discharge state and the charge state of the battery module 19.

[0072] <Placement of equipment installed on the upper rotating body> Figure 3 is a top view showing an example of the arrangement structure of various equipment on the upper rotating body 3. In Figure 3, the housing section, which is the exterior of the upper rotating body 3, is omitted in order to expose the various equipment on the upper rotating body 3.

[0073] As shown in Figure 3, in this example, the battery module 19 is mounted on the right side of the upper rotating body 3, extending from the front to the center in the longitudinal direction.

[0074] The area extending from the center to the rightmost end in the left-right direction of the rear of the upper rotating body 3 is equipped with a pump motor 12, a main pump 14, a pilot pump 15, a control valve 17, and an inverter 18.

[0075] The pump motor 12 and inverter 18 are integrally arranged in the center of the rear of the upper slewing body 3 in the left-right direction. The pump motor 12 and inverter 18 are arranged such that the rotation axis of the pump motor 12 is aligned in the left-right direction and the output shaft extends to the right. For example, the pump motor 12 is mounted on the bottom 3B (slewing frame) of the upper slewing body 3 via a mounting member. Specifically, the pump motor 12 may be positioned relatively close to the bottom 3B so that the positions of the main pump 14 and pilot pump 15, which are connected in a mechanically drivable manner, are as low as possible. This allows the position of the main pump 14 to be lower than the liquid level inside the hydraulic oil tank T. Therefore, the occurrence of air entrapment in the main pump 14 can be suppressed.

[0076] The main pump 14 and pilot pump 15 are positioned adjacent to the right side of the pump motor 12, with their input shafts connected to the output shaft of the pump motor 12. The main pump 14 and pilot pump 15 are mounted on the bottom 3B via the pump motor 12, for example, by being connected to the pump motor 12.

[0077] The control valve 17 is positioned in the center of the rear of the upper slewing body 3 in the left-right direction, and above the pump motor 12. For example, the pump motor 12 and the main pump 14 are positioned relatively low in the space between the bottom 3B and the housing of the upper slewing body 3, while the control valve 17 is positioned relatively high in that space. Specifically, a support frame 17MT is attached to the bottom 3B so as to straddle the pump motor 12 in the front-rear direction. The control valve 17 is then mounted on the support frame 17MT, and thus mounted on the bottom 3B via the support frame 17MT.

[0078] The control valve 17 may be positioned above the main pump 14 or the pilot pump. Alternatively, the control valve 17 may be positioned to straddle the space between the pump motor 12 and the main pump 14 or pilot pump 15 in the left-right direction.

[0079] A hydraulic slewing motor 2M is mounted in the center of the upper slewing body 3.

[0080] A hydraulic oil tank T is positioned in the space between the slewing hydraulic motor 2M, the pump electric motor 12, and the control valve 17 in the front-rear direction. The hydraulic oil tank T is mounted on the bottom 3B either directly or via a bracket or the like.

[0081] The side of the cabin 10 of the upper rotating body 3 is provided with a vehicle inlet 101 for normal charging and a vehicle inlet 102 for rapid charging. The vehicle inlet 101 for normal charging and the vehicle inlet 102 for rapid charging are arranged side by side, for example, in the front-to-back direction (X-axis direction: first direction example). An AC-DC converter 103 for charging is also located inside the cabin 10.

[0082] A standard charging vehicle inlet 101 (an example of a charging port) connects to the charging connector at connection surface 101A. A fast charging vehicle inlet 102 (an example of a charging port) connects to the charging connector at connection surface 102A.

[0083] As shown in Figure 3, an openable and closable outer flap 150 is provided on the left side of the upper rotating body 3. Inside the space 155 created by opening the outer flap 150, there is a first inner flap (an example of a first cover member) 151 that covers the connection surface 101A of the normal charging vehicle inlet 101, and a second inner flap (an example of a second cover member) 152 that covers the connection surface 102A of the rapid charging vehicle inlet 102.

[0084] The first inner flap (an example of a first cover member) 151 and the second inner flap (an example of a second cover member) are made openable and closable. For example, when connecting a charging connector to the vehicle inlet 101 for normal charging, the first inner flap 151 is opened. Furthermore, when connecting a charging connector to the vehicle inlet 102 for rapid charging, the second inner flap 152 is opened.

[0085] <Explanation regarding the opening and closing of the outer flap on the upper rotating body> Figure 4 is an explanatory diagram illustrating the opening and closing of the outer flap 150 provided on the upper rotating body 3 of the shovel 200 according to this embodiment. As shown in Figure 4(A), the outer flap 150, which is also provided on the left side of the upper rotating body 3, is provided to protect the appearance of the shovel 200 and to protect the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102 from the external environment. This embodiment describes an example in which the outer flap 150, which matches the appearance of the shovel 200, is provided as an outer cover member to cover a plurality of inner flaps. However, this embodiment does not restrict the shape of the outer cover member, and any shape is acceptable as long as the cover member can cover a plurality of inner flaps.

[0086] As shown in Figure 4(B), when the outer flap 150 is opened, the first inner flap 151 and the second inner flap 152 are positioned. By opening either the first inner flap 151 or the second inner flap 152, the charging connector can be connected to the normal charging vehicle inlet 101 or the rapid charging vehicle inlet 102.

[0087] The example shown in Figure 4(B) illustrates the case where the second inner flap 152 is open and the rapid charging connector 401 is connected to the rapid charging vehicle inlet 102. In the example shown in Figure 4(B), when the second inner flap 152 is opened, the outer periphery of the second inner flap 152 prevents the first inner flap 151 from being opened. Therefore, the specific configurations of the first inner flap 151 and the second inner flap 152 will now be described.

[0088] <Description of multiple inner flaps and vehicle inlets> Figure 5 is a diagram showing the arrangement of multiple inner flaps 151, 152 and the vehicle inlet according to this embodiment. In the example shown in Figure 5, the second inner flap 152 is shown in the open state.

[0089] As shown in Figure 5, the first inner flap 151 (an example of a cover member) comprises a first locking member 151A and a first rotating mechanism 151B, and is an openable and closable cover member that covers the connection surface 101A of the vehicle inlet 101 for normal charging.

[0090] The first rotation mechanism 151B is a mechanism that includes a rotation axis (an example of a first rotation axis) that serves as a reference for the rotational movement of the first inner flap 151. Furthermore, the first rotation mechanism 151B may include a spring member (an example of an elastic member) that can move the first inner flap 151 to a predetermined position where the charging connector can be connected to the vehicle inlet 101 for normal charging. The predetermined position is, for example, a position where the first inner flap 151 has rotated by 90 degrees or more, but is not limited to this position.

[0091] The first locking member 151A (an example of a locking member) is a member that can switch whether or not to fix the position of the first inner flap 151 in a state where it covers the connection surface 101A of the normal charging vehicle inlet 101 (closed state). For example, by pressing the first locking member 151A, the locking mechanism provided on the connection surface 101A releases the fixing (holding) of the first locking member 151A. When this fixing is released, the spring member of the first rotation mechanism 151B may pop up the first inner flap 151.

[0092] Similarly, the second inner flap 152 comprises a second locking member 152A and a second rotating mechanism 152B, and is an openable and closable cover member that covers the connection surface 102A of the rapid charging vehicle inlet 102.

[0093] The second rotation mechanism 152B is a mechanism that includes a rotation axis (an example of a second rotation axis) that serves as a reference for the rotational movement of the second inner flap 152. Furthermore, the second rotation mechanism 152B may include a spring member (an example of an elastic member) that can move the second inner flap 152 to a predetermined position where the charging connector can be connected to the vehicle inlet 101 for normal charging. The predetermined position is, for example, a position where the second inner flap 152 has rotated by 90 degrees or more, but is not limited to this position.

[0094] The second locking member 152A (an example of a locking member) is a member that can switch whether or not to fix the position of the second inner flap 152 in a state where it covers the connection surface 102A of the rapid charging vehicle inlet 102 (closed state). For example, by pressing the second locking member 152A, the locking mechanism 102B provided on the connection surface 102A releases the fixing (holding) of the second locking member 152A. When this fixing is released, the spring member of the second rotation mechanism 152B may pop up the second inner flap 152.

[0095] The example shown in Figure 5 illustrates the case where the second inner flap 152 is in the open position. The second inner flap 152 is held open by approximately 90 degrees by the spring member of the second rotation mechanism 152B.

[0096] The connection surface 102A of the rapid charging vehicle inlet 102 is provided with a locking mechanism 102B for fixing the second locking member 152A. By fitting the second locking member 152A into the locking mechanism 102B, the second inner flap 152 can be fixed in a closed position.

[0097] As shown in Figure 5, the standard charging vehicle inlet 101 and the rapid charging vehicle inlet 102 are located close together. The positional relationship between the standard charging vehicle inlet 101 and the rapid charging vehicle inlet 102 will be explained below.

[0098] The first rotating mechanism 151B and the second rotating mechanism 152B are located between the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102. Furthermore, the first rotating mechanism 151B and the second rotating mechanism 152B are positioned such that the first inner flap 151 and the second inner flap 152 do not open simultaneously. In other words, in this embodiment, the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102 are located in close proximity. Moreover, since the first rotating mechanism 151B and the second rotating mechanism 152B are located between the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102, when one of the first inner flap 151 and the second inner flap 152 opens, they move closer to the other. This prevents the other of the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102 from opening, thereby suppressing the simultaneous opening of multiple charging vehicle inlets and improving safety.

[0099] In other words, when either the first inner flap 151 or the second inner flap 152 is opened, at least a portion of the components of the open inner flap is within the range of movement when the other inner flap is opened. That is, the open inner flap is positioned to prevent the other inner flap from opening to a degree that allows the charging connector to be connected. This prevents multiple inner flaps from opening to a degree that allows the charging connector to be connected simultaneously.

[0100] In the example shown in Figure 5, when the second inner flap 152 is opened to 90 degrees or more, and an attempt is made to open the first inner flap 151, the outer surface of the first inner flap 151 (the surface opposite to the surface in contact with the normal charging vehicle inlet 101) or the first rotation mechanism 151B comes into contact with the outer circumference of the second inner flap 152, thereby preventing the first inner flap 151 from opening. Subsequently, the first inner flap 151 may be fixed to the first locking member 151A by being pushed by the second inner flap 152 or the like, and may be closed again.

[0101] Similarly, if the first inner flap 151 is opened to a position of 90 degrees or more, and an attempt is made to open the second inner flap 152, the outer surface of the second inner flap 152 (the surface opposite to the surface in contact with the rapid charging vehicle inlet 102) or the second rotation mechanism 152B will come into contact with the outer circumference of the first inner flap 151, thereby preventing the second inner flap 152 from opening. Subsequently, the second inner flap 152 may be fixed to the second locking member 152A by being pushed by the first inner flap 151 or the like, and may be closed again.

[0102] In other words, in this embodiment, the rotation axis of the rotation mechanism 152B of the second inner flap 152 is located closer to the normal charging vehicle inlet 101 covered by the first inner flap 151 compared to the rotation axis of the rotation mechanism 151B of the first inner flap 151. Similarly, the rotation axis of the rotation mechanism 151B of the first inner flap 151 is located closer to the rapid charging vehicle inlet 102 covered by the second inner flap 152 compared to the rotation axis of the rotation mechanism 152B of the second inner flap 152. As a result, when one of the multiple inner flaps is opened, the outer circumference of the opened inner flap (at least one example of a part of its configuration) is within the range of movement when opening the other inner flap. This prevents multiple inner flaps 151 and 152 from being opened simultaneously.

[0103] As shown in Figure 5, when the second inner flap 152 is open, the length of the second inner flap 152 in the Y-axis direction is longer than the depth of the space 155 in the Y-axis direction shown in Figure 3. The first inner flap 151 has approximately the same length as the second inner flap 152. Therefore, when the first inner flap 151 or the second inner flap 152 is open, when closing the outer flap 150, a part of the open inner flap (first inner flap 151 or second inner flap 152) comes into contact with the outer circumference of the open inner flap (first inner flap 151 or second inner flap 152). In other words, a part of the open inner flap exists within the range of movement of the outer flap 150. Therefore, when the first inner flap 151 or the second inner flap 152 is open, closing the outer flap 150 is suppressed. This prevents forgetting to close the inner flap (first inner flap 151 or second inner flap 152) when closing the outer flap 150.

[0104] Furthermore, if the outer flap 150 is not closed, the operator of the shovel 200 may be notified. For example, a notification that the outer flap 150 is not closed may be sent to the output device 50 (display device) inside the cabin 10 of the shovel 200. In this embodiment, the shovel 200 may also notify the operator's communication terminal that the outer flap 150 is not closed.

[0105] <Transition of open / closed states of multiple inner flaps> Figure 6 illustrates the transition between the open and closed states of the first inner flap 151 and the second inner flap 152 according to this embodiment. In Figure 6, for clarity, the rotation axis of the first rotating mechanism 151B and the rotation axis of the second rotating mechanism 152B are shown.

[0106] In state 1601 of Figure 6, both the first inner flap 151 and the second inner flap 152 are in a closed state.

[0107] In state 1601, opening the first inner flap 151 transitions to state 1602. In state 1602, the first inner flap 151 is open and the second inner flap 152 is closed. This allows the charging connector to be connected to the normal charging vehicle inlet 101. In state 1602, the outer circumference of the first inner flap 151 is within the range of movement of the second inner flap 152 relative to the rotation axis of the second rotating mechanism 152B, thus preventing the second inner flap 152 from opening. To open the second inner flap 152, it is necessary to close the first inner flap 151 and transition to state 1601.

[0108] In state 1601, if the second inner flap 152 is opened, the system transitions to state 1603. In state 1603, the second inner flap 152 is open and the first inner flap 151 is closed. This allows the charging connector to be connected to the rapid charging vehicle inlet 102. In state 1603, the outer circumference of the second inner flap 152 is within the range of movement of the first inner flap 151 relative to the rotation axis of the first rotating mechanism 151B, thus preventing the first inner flap 151 from opening. In order to open the first inner flap 151, the second inner flap 152 must be closed, and the system transitions to state 1601.

[0109] In this embodiment, the combination of the first inner flap 151 and the first rotating mechanism 151B, and the combination of the second inner flap 152 and the second rotating mechanism 152B are arranged in a nested manner. This prevents the first inner flap 151 and the second inner flap 152 from opening simultaneously. Furthermore, although they are arranged in a nested manner in this embodiment, the combination of the first inner flap 151 and the first rotating mechanism 151B, and the combination of the second inner flap 152 and the second rotating mechanism 152B can be configured separately. Therefore, maintenance can be performed on a combination basis, making maintenance work easier.

[0110] In this embodiment, for each inner flap, the rotation axis of the rotation mechanism of one inner flap is located closer to the charging vehicle inlet covered by the other inner flap compared to the rotation axis of the rotation mechanism of the other inner flap. Therefore, when one inner flap is rotated by 90 degrees or more in the front-rear direction (X-axis direction: example of the first direction), that inner flap moves closer to the other inner flap than the rotation axis that serves as the reference for rotating the other inner flap. Specifically, when one inner flap is rotated to open by 90 degrees or more, that inner flap moves between the other inner flap and its rotation axis in the front-rear direction. Due to this arrangement, when one inner flap is opened by 90 degrees or more, that inner flap is within the rotation range of the other inner flap with respect to its rotation axis, thus preventing the other inner flap from being opened. Consequently, it is possible to prevent multiple inner flaps from being opened simultaneously, thereby improving safety.

[0111] (Variation 1) The above-described embodiment shows an example in which the positional relationship between the first rotating mechanism 151B and the second rotating mechanism 152B suppresses the state in which the first inner flap 151 and the second inner flap 152 are opened simultaneously. Specifically, for each inner flap, the rotation axis of the rotating mechanism of one inner flap is located closer to the charging vehicle inlet covered by the other inner flap compared to the rotation axis of the rotating mechanism of the other inner flap. Therefore, when one inner flap is opened by 90 degrees or more, the one inner flap is within the rotational range of the other inner flap, thus suppressing the opening of the other inner flap. However, this embodiment shows only one aspect of the positional relationship between the first rotating mechanism 151B and the second rotating mechanism 152B, and other aspects may also be used.

[0112] Therefore, in Modification 1, we will describe the case in which the rotation axes of the first and second rotation mechanisms are shared. In other words, in this modification, when the rotation axes of the first and second rotation mechanisms are shared, and one inner flap is rotated by 90 degrees or more in the front-to-back direction (X-axis direction: example of the first direction), a part of the said inner flap (for example, the outer circumference) approaches the other inner flap more closely than the rotation axis that serves as the reference for rotating the other inner flap, thereby suppressing the opening of the other inner flap.

[0113] Figure 7 illustrates the transition of opening and closing of the first inner flap 251 and the second inner flap 252 in this modified example. In the example shown in Figure 7, the first inner flap 251 has a first rotation mechanism that rotates the first inner flap 251, and the second inner flap 252 has a second rotation mechanism that rotates the second inner flap 252. The first rotation mechanism of the first inner flap 251 and the second rotation mechanism of the second inner flap 252 are configured to share a rotation axis 253B that serves as the reference axis for rotational movement. In this modified example, by sharing the rotation axis 253B, the axial directions indicated by the rotation axis that serves as the reference axis for rotational movement of the first inner flap 251 and the second inner flap 252 are made to substantially coincide.

[0114] This modification describes the case where the first inner flap 251 and the second inner flap 252 share the same rotation axis 253B. However, this modification is not limited to the case where the first inner flap 251 and the second inner flap 252 share the same rotation axis. They may be provided separately as long as the axial directions of the rotation axes of the first inner flap 251 and the second inner flap 252 are substantially the same.

[0115] In state 1701 of Figure 7, both the first inner flap 251 and the second inner flap 252 are in a closed state.

[0116] In state 1701, if the first inner flap 251 is opened by 90 degrees or more, the system transitions to state 1702. In state 1702, the first inner flap 251 is open by 90 degrees or more, and the second inner flap 252 is closed. As a result, the charging connector can be connected to the vehicle inlet 101 for normal charging. In state 1702, the outer circumference of the first inner flap 251 is within the range of movement of the second inner flap 252 relative to the rotation axis 253B, thus preventing the second inner flap 252 from opening. In order to open the second inner flap 252, it is necessary to close the first inner flap 251 and transition to state 1701.

[0117] In state 1701, if the second inner flap 252 is opened by 90 degrees or more, the system transitions to state 1703. In state 1703, the second inner flap 252 is open by 90 degrees or more, and the first inner flap 251 is closed. This allows the charging connector to be connected to the rapid charging vehicle inlet 102. In state 1703, the outer circumference of the second inner flap 252 is within the range of movement of the first inner flap 251 relative to the rotation axis 253B, thus preventing the first inner flap 251 from opening. Therefore, in order to open the first inner flap 251, it is necessary to close the second inner flap 252 and transition to state 1701.

[0118] In this modified example, since the axial directions of the rotation axes of the first inner flap 251 and the second inner flap 252 are substantially coincided, opening one of the inner flaps prevents the other from opening. This improves safety, similar to the embodiment described above.

[0119] In this embodiment, the first inner flap 251 and the second inner flap 252 use a common rotating shaft 253B, thereby reducing the number of parts and lowering costs.

[0120] (Modification 2) Modification 2 shows another embodiment that suppresses the state in which the first inner flap and the second inner flap are opened simultaneously. In this modification, when one inner flap is rotated by 90 degrees or more in the front-rear direction (X-axis direction: example of the first direction), the projection provided on the first inner flap approaches the other inner flap more closely than the axis of rotation that serves as the reference for rotating the other inner flap, thereby suppressing the opening of the other inner flap.

[0121] Figure 8 shows the arrangement of multiple inner flaps in this modified example. In the example shown in Figure 8, the first inner flap 351 and the second inner flap 352 are shown in a closed state.

[0122] As shown in Figure 8, the first rotation mechanism of the first inner flap 351 functions to rotate around the rotation axis 351B. Similarly, the second rotation mechanism of the second inner flap 352 functions to rotate around the rotation axis 352B.

[0123] In the example shown in Figure 8, the rotation axis 351B, which serves as the reference for the rotational movement of the first inner flap 351, and the rotation axis 352B, which serves as the reference for the rotational movement of the second inner flap 352, are provided between the normal charging vehicle inlet 101 and the rapid charging vehicle inlet 102, similar to the embodiments and modifications described above. However, a gap exists between the rotation axis 351B of the first inner flap 351 and the rotation axis 352B of the second inner flap 352. Therefore, as in the embodiments and modifications described above, when one of the inner flaps is opened, it is difficult to prevent the outer circumference of the open inner flap from opening the other inner flap.

[0124] Therefore, in this modified example, the first inner flap 351 is provided with a first projection 351C on the side opposite to the surface (outer surface) that contacts the vehicle inlet 101 for normal charging, and the second inner flap 352 is provided with a second projection 352C on the side opposite to the surface (outer surface) that contacts the vehicle inlet 102 for rapid charging.

[0125] Furthermore, when either the first inner flap 351 or the second inner flap 352 is opened by 90 degrees or more, the projection (first projection 351C or second projection 352C) of the open inner flap (first inner flap 351 or second inner flap 352) is positioned to be within the range of movement when opening the other flap (second inner flap 352 or first inner flap 351). This prevents the other inner flap from being opened when one inner flap is opened by 90 degrees or more.

[0126] Figure 9 illustrates the transition between the open and closed states of the first inner flap 351 and the second inner flap 352 in this modified example. In the example shown in Figure 9, the first inner flap 351 has a first rotation mechanism that rotates the first inner flap 351 with respect to a rotation axis 351B. The second inner flap 352 has a second rotation mechanism that rotates the second inner flap 352 with respect to a rotation axis 352B.

[0127] The first inner flap 351 covers the connection surface 101A of the normal charging vehicle inlet 101, and the second inner flap 352 covers the connection surface 102A of the rapid charging vehicle inlet 102.

[0128] In state 1901, if the first inner flap 351 is opened by 90 degrees or more, the system transitions to state 1902. In state 1902, the first inner flap 351 is open by 90 degrees or more, and the second inner flap 352 is closed. This allows the charging connector to be connected to the vehicle inlet 101 for normal charging. In state 1902, the first projection 351C on the first inner flap 351 is in contact with the second projection 352C on the second inner flap 352, pushing it in the -X-axis direction. This prevents the second inner flap 352 from opening. To open the second inner flap 352, the first inner flap 351 must be closed, and the system transitions to state 1901.

[0129] In state 1901, if the second inner flap 352 is opened by 90 degrees or more, the system transitions to state 1903. In state 1903, the second inner flap 352 is open by 90 degrees or more, and the first inner flap 351 is closed. This allows the charging connector to be connected to the rapid charging vehicle inlet 102. In state 1903, the second projection 352C on the second inner flap 352 is in contact with the first projection 351C on the first inner flap 351, pushing it in the +X axis direction. This prevents the first inner flap 351 from opening. To open the first inner flap 351, the second inner flap 352 must be closed, and the system transitions to state 1901.

[0130] In this modified example, a first projection 351C is provided on the first inner flap 351, and a second projection 352C is provided on the second inner flap 352. This prevents the other inner flap from opening when one inner flap is open, even if there is a gap between the rotation axis 351B of the first projection 351C and the rotation axis 352B of the second inner flap 352. In other words, this modified example prevents multiple inner flaps from opening simultaneously by providing a projection on each of the multiple inner flaps, even if the arrangement of the rotation axis and inner flaps is not as in the above-described embodiment and modified example.

[0131] In this modified example, the height of the first projection 351C on the first inner flap 351 and the height of the second projection 352C on the second inner flap 352 are provided to be greater than the distance between the multiple rotation axes. As a result, the projection of one inner flap can reach the rotation range of the other inner flap.

[0132] In this modified example, the position of the first projection 351C provided on the first inner flap 351, and The position of the second projection 352C provided on the second inner flap 352 is shown as an example and does not limit the position where the projection is provided. For example, the projection may be provided even closer to the axis of rotation than in the examples shown in Figures 8 and 9. Also, the size and shape of the projection are shown as an example and do not limit the size and shape of the projection. In other words, the position, size, and shape should be determined so that the projection provided on one flap when it is open is within the range of movement when the other flap is opened.

[0133] Furthermore, the protrusions may be made of resin or the like, which are integrally molded with the inner flap, but they do not have to be integrally molded with the inner flap, and they may be made of any material.

[0134] In this modified example, since the projections provided on each inner flap obstruct the movement of other inner flaps, the combination of the first inner flap 351 and the first rotation mechanism (including the rotation shaft 351B), and the combination of the second inner flap 352 and the second rotation mechanism (including the rotation shaft 352B) can be provided as separate configurations. This allows maintenance to be performed on a combination basis, making maintenance work easier.

[0135] The embodiments and modifications described above are merely examples of the shape of the inner flap, and are not limited to the shapes described above. The inner flap may have any shape as long as it prevents dust, dirt, or liquid from entering the normal charging vehicle inlet 101 or the rapid charging vehicle inlet 102.

[0136] The material used for the inner flap in the embodiments and modifications described above may be, for example, a waterproof resin.

[0137] The embodiments and modifications described above illustrate the configuration of the rotation axis and projections of the first inner flap and the second inner flap as examples, and other configurations are possible. For example, the rotation axis may be shared, and projections may be provided on each of the first inner flap and the second inner flap.

[0138] The embodiments and modifications described above describe examples in which the rotation mechanism of the first inner flap and the second inner flap includes a spring member for moving the inner flaps to a predetermined position. The spring member may be provided, for example, inside the rotation axis (hinge) of the rotation mechanism, but it may be provided at any position as long as it is possible to move the inner flaps to a predetermined position.

[0139] Furthermore, the embodiments and modifications described above are not limited to examples in which a spring member is included in the rotating mechanism; the rotating mechanism does not need to include a spring member. In this case, a person may operate to open the inner flap to a position where the charging connector can be connected. When the inner flap is opened to a position where the charging connector can be connected, rotational movement to the open state of the other inner flap is prevented, similar to the embodiments and modifications described above. This produces the same effects as the embodiments and modifications described above.

[0140] The spring member included in the rotating mechanism shown in the above-described embodiments and modifications is shown as an example of an elastic member that rotates the inner flap. Any elastic member other than a spring member that rotates the inner flap may be used.

[0141] In this embodiment and its modifications, an example is described in which two cover members, a first inner flap and a second inner flap, are provided. However, this embodiment does not limit the number of cover members.

[0142] In the embodiments and modifications described above, an example was explained in which opening of either the first inner flap or the second inner flap is suppressed by opening one of them by 90 degrees or more. However, the embodiments and modifications described above do not limit the opening angle of one inner flap to 90 degrees or more; other angles are also acceptable. In other words, as long as the opening of the other inner flap is suppressed while one inner flap is open enough for the charging connector to be connected, the opening angle of the inner flaps can be any angle.

[0143] <effect> In the embodiments and modifications described above, it is suppressed that the multiple inner flaps (first inner flap 151 and second inner flap 152) are opened simultaneously. This prevents the simultaneous connection of charging connectors to each of the multiple charging vehicle inlets (normal charging vehicle inlet 101 and rapid charging vehicle inlet 102). Furthermore, by keeping one inner flap open and the other inner flap closed, it is possible to prevent dust, dirt, or liquids from entering the charging vehicle inlet covered by the other inner flap. This improves safety.

[0144] In the embodiments and modifications described above, when opening one of the multiple inner flaps (first inner flap 151 and second inner flap 152), a spring member (an example of an elastic member) moves the inner flap to a position where the charging connector can be connected. This reduces the workload required to connect the charging connector. Furthermore, when one inner flap moves to a position where the charging connector can be connected, a part of that inner flap prevents the other flap from opening. This improves safety.

[0145] Furthermore, when the inner flap is moved to a position where the charging connector can be connected, and the inner flap is open to that position, the inner flap prevents the outer flap from being closed. In other words, in order to close the outer flap, multiple inner flaps must be closed. This means that when closing the outer flap, it is difficult to forget to close the inner flaps. This improves safety.

[0146] Each of the multiple inner flaps (first inner flap and second inner flap) has a locking member that can switch between fixing the position of the inner flap while covering the charging vehicle inlet (an example of a charging port). This prevents the inner flaps (first inner flap and second inner flap) from opening unintentionally. In particular, since each of the multiple inner flaps has a locking member even when a spring member is provided in the rotating mechanism, the inner flap can be fixed while covering the charging vehicle inlet (normal charging vehicle inlet 101 and rapid charging vehicle inlet 102). This prevents dust, dirt, or liquid from entering the charging vehicle inlet by preventing the inner flap covering the charging vehicle inlet (normal charging vehicle inlet 101 or rapid charging vehicle inlet 102) from opening automatically, thereby improving safety.

[0147] Although embodiments have been described in detail above, this disclosure is not limited to these specific embodiments, and various modifications and changes are possible within the scope of the gist described in the claims. [Explanation of Symbols]

[0148] 200 Shovel 1. Lower running body 2. Swivel mechanism 3. Upper rotating body 4 Boom 5 Arms 6 buckets 7 Boom Cylinder 8 Arm Cylinder 9 Bucket Cylinder 10 cabins 12 Electric motors for pumps 14 Main pump 19 Battery Modules 191 Battery Controller 192 batteries 30 Shovel Controller 101 Vehicle inlet for standard charging 102 Vehicle inlet for rapid charging 101A, 102A connection surface 103 AC-DC converter for charging 150 Outer flap 151, 251, 351 First Inner Flap 152, 252, 352 Second inner flap 151A First locking component 152A Second locking component 151B First Rotation Mechanism 152B Second Rotation Mechanism 253B, 351B, 352B Rotation axis

Claims

1. Electric motor and, A battery that supplies power to the aforementioned electric motor, Multiple charging ports for supplying power to the aforementioned battery, It has a plurality of openable and closable cover members that cover each of the plurality of charging ports, When one of the aforementioned multiple cover members is opened, at least a portion of the components of the open cover member is configured to be located within the range that moves when opening the other cover member. The aforementioned multiple charging ports are arranged in close proximity. Each of the aforementioned plurality of cover members is provided with a rotation axis that serves as a reference for rotational movement. The multiple rotating shafts are provided between the multiple charging ports, The rotation axis of one of the cover members is positioned closer to the charging port covered by the other cover member, compared to the rotation axis of the other cover member. The rotation axis of the other cover member is positioned closer to the charging port covered by the first cover member compared to the rotation axis of the first cover member. Electric excavator.

2. An electric motor and, A battery that supplies power to the aforementioned electric motor, Multiple charging ports for supplying power to the aforementioned battery, It has a plurality of openable and closable cover members that cover each of the plurality of charging ports, When one of the aforementioned multiple cover members is opened, at least a portion of the components of the open cover member is configured to be located within the range that moves when opening the other cover member. The aforementioned multiple charging ports are arranged in close proximity. Each of the aforementioned plurality of cover members is provided with a rotation axis that serves as a reference for rotational movement. The multiple rotating shafts are provided between the multiple charging ports, Each of the aforementioned plurality of cover members has a projection on the side opposite to the side in contact with the charging port. When one of the cover members is opened with respect to the rotation axis, the projection of the one cover member is configured to be located within the range of movement when opening the other cover member. Electric excavator.

3. It further has an outer cover member that covers the plurality of cover members, When at least one of the plurality of cover members is in an open state, the outer cover member is provided such that a portion of the open cover member exists within the range of movement when the outer cover member is closed. The electric excavator according to claim 1 or 2.

4. Each of the aforementioned plurality of cover members further has a rotation mechanism for rotating the cover member, The rotation mechanism has an elastic member that can rotate the cover member to a predetermined position. The electric excavator according to claim 1 or 2.

5. Each of the plurality of cover members further has a locking member that can be switched to or not to fix the position of the cover member while it is covering the charging port. An electric shovel according to any one of claims 1 to 4.

6. The aforementioned multiple charging ports are arranged in a first direction, When one of the cover members is rotated, the configuration of a part of the one cover member is configured to move closer to the other cover member in the first direction than the rotation axis that serves as the reference for rotating the other cover member. An electric shovel according to any one of claims 1 to 5.

7. When one of the cover members is opened to an angle of 90 degrees or more, the configuration of a part of the one cover member is configured to be located within the range that moves when the other cover member is opened. An electric shovel according to any one of claims 1 to 6.

8. In each of the rotation axes of the plurality of cover members, the axial directions are configured to be substantially coincide. An electric shovel according to any one of claims 1 to 7.

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