JP2023134163A - Electric shovel - Google Patents

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

The present disclosure relates to an electric excavator.

In recent years, electrically driven excavators have been proposed that have an electric motor that operates a hydraulic drive system. In the electrically driven excavator, an electric motor is driven by electric power supplied from a battery provided in the main body.

Electrically driven excavators tend to be provided with an inlet for normal charging and an inlet for quick charging. Since it is difficult to perform normal charging and quick charging at the same time, the technology described in Patent Document 1 has an inlet for normal charging and a connector for quick charging so that the connector for normal charging and the connector for quick charging cannot be connected at the same time. An inlet is provided.

JP 2020-45702 Publication

However, the technique described in Patent Document 1 does not consider suppressing the intrusion of dust and water into each of the inlet for normal charging and the inlet for quick charging.

Therefore, in view of the above issues, when one of the multiple inlets is connected to the charging connector, by preventing the other inlet from being exposed, the other inlet can be connected to the charging connector. It is an object of the present invention to improve safety by suppressing connection of a power supply connector to an inlet and suppressing dust or the like from entering the other inlet.

To achieve the above object, an electric excavator according to an embodiment of the present disclosure 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 charging ports. a plurality of cover members that can be opened and closed to cover each cover member, and when one of the plurality of cover members is in an open state, the configuration of at least a part of one of the cover members in the open state is The cover member is configured to be present in a range that moves when the other cover member is opened.

According to the embodiment described above, safety is improved by preventing charging members from being connected to each of the plurality of charging ports at the same time, and by covering charging ports to which no charging members are connected with the cover member. improve.

FIG. 1 is a side view showing a shovel (excavator) according to an embodiment. FIG. 2 is a block diagram schematically showing an example of the configuration of the shovel according to the embodiment. FIG. 3 is a top view showing an example of the arrangement structure of various devices of the revolving upper structure according to the embodiment. FIG. 4 is an explanatory diagram showing opening and closing of the outer flap provided on the upper revolving body of the excavator according to the embodiment. FIG. 5 is a diagram showing the arrangement relationship between a plurality of inner flaps and a vehicle inlet according to the embodiment. FIG. 6 is a diagram illustrating the transition of the opening and closing states of the first inner flap and the second inner flap according to the embodiment. FIG. 7 is a diagram illustrating the transition of opening and closing of the first inner flap and the second inner flap according to Modification 1. FIG. 8 is a diagram showing the arrangement relationship of a plurality of inner flaps according to Modification 2. FIG. 9 is a diagram illustrating the transition of the opening and closing states of the first inner flap and the second inner flap according to the second modification.

Embodiments of the present invention will be described below with reference to the drawings. Further, the embodiments described below are illustrative rather than limiting the invention, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention. Note that in each drawing, the same or corresponding configurations are denoted by the same or corresponding symbols, and explanations may be omitted.

(First embodiment)
First, an overview of an excavator 200 according to a first embodiment will be described as an example of an electric excavator.

[Excavator overview]
As shown in FIG. 1, an excavator 200 according to the present embodiment includes a lower traveling body 1, an upper rotating body 3 that is rotatably mounted on the lower traveling body 1 via a rotating mechanism 2, and a boom as an attachment. 4, an arm 5, a bucket 6, and a cabin 10.

The lower traveling body 1 includes, for example, a pair of left and right crawlers, and each of the crawlers is hydraulically driven by traveling hydraulic motors 1R and 1L (see FIG. 2), so that the lower traveling body 1 moves by itself.

The upper rotating body 3 is hydraulically driven by a rotating hydraulic motor 2M (see FIG. 2) through the rotating mechanism 2, so that the upper rotating body 3 rotates with respect to the lower traveling body 1. All driven elements (for example, the swing hydraulic motor 2M) are hydraulically driven by hydraulic oil supplied from the 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 electric motor 12.

Further, the upper revolving body 3 may be electrically driven by a swing electric motor driven by electric power supplied from the battery module 19 through the swing mechanism 2 instead of the swing hydraulic motor 2M. In this case, for example, the shovel 200 is connected from the battery module 19 to the swing electric motor via the power converter 100 and the inverter. The electric motor for swinging may perform a power running operation in which the upper rotating structure 3 is driven to swing under the control of the shovel controller 30 and an inverter, and a regenerative operation in which regenerative power is generated to swing and brake the upper rotating structure 3. . Further, the swing electric motor may supply regenerated power to the battery module 19 and the pump electric motor 12 via an inverter.

The boom 4 is attached to the center of the front part of the upper revolving body 3 so that it can be lifted up and down, an arm 5 is attached to the tip of the boom 4 so that it can move up and down, and a bucket 6 is attached to the tip of the arm 5 so that it can be moved up and down. Can be installed. The boom 4, arm 5, and bucket 6 are hydraulically driven by a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9 as hydraulic actuators, respectively.

An outer flap 150 (an example of an outer cover member) is provided at the rear of the left side surface of the upper rotating body 3. The outer flap 150 can be opened and closed, and a charging vehicle inlet (an example of a charging port) for charging the excavator 200 is provided in the space inside the outer flap 150 when the outer flap 150 is opened.

The bucket 6 is an example of an end attachment, and other end attachments may be attached to the tip of the arm 5 instead of the bucket 6 depending on the content of the work. The other end attachment may be a different type of bucket from the bucket 6, such as a slope bucket or a dredging bucket. Further, the other end attachment may be a different type of end attachment from the bucket, such as a breaker, an agitator, or a grapple.

The cabin 10 is mounted on the front left side of the upper revolving structure 3, and is provided with a cockpit seat for an operator, an operating device 26 (see FIG. 2), etc. to be described later.

The excavator 200 operates driven elements such as the lower traveling body 1 (left and right crawlers), the upper rotating body 3, the boom 4, the arm 5, and the bucket 6 in response to operations by an operator riding in the cabin 10.

Further, instead of being configured to be operable by an operator riding in the cabin 10, or in addition, the shovel 200 may be configured to be remotely operated from outside the shovel 200. When the excavator 200 is remotely controlled, the interior of the cabin 10 may be unmanned. The following description will proceed on the premise that the operator's operations include at least one of an operator's operation on the operating device 26 by an operator in the cabin 10 and a remote control by an external operator.

The remote control includes, for example, a mode in which the shovel 200 is operated by an operation input regarding an actuator of the shovel 200 performed by a predetermined external device. In this case, the excavator 200 may be equipped with a communication device (not shown) capable of communicating with a predetermined external device, and may, for example, transmit image information (captured image) output by an imaging device (not shown) to the external device. . Then, the external device may display the received image information (captured image) on a display device (hereinafter referred to as a "remote control display device") provided in the external device. Further, various information images (information screens) displayed on the output device 50 (display device) inside the cabin 10 of the excavator 200 may be similarly displayed on a remote control display device of an external device. As a result, the operator of the external device can, for example, remotely operate the shovel 200 while checking the display contents such as a captured image showing the surroundings of the shovel 200 or an information screen displayed on the remote control display device. can. Then, the excavator 200 operates the hydraulic actuator in response to a remote control signal indicating the content of the remote control received from an external device through the communication device, and operates the lower traveling structure 1 (left and right crawlers), the upper rotating structure 3, Driven elements such as boom 4, arm 5, and bucket 6 may be driven.

Further, the remote control may include, for example, a mode in which the shovel 200 is operated by external voice input or gesture input to the shovel 200 by a person (for example, a worker) around the shovel 200. Specifically, the excavator 200 receives sounds uttered by surrounding workers etc. through an audio input device (for example, a microphone) or a gesture input device (for example, an imaging device) mounted on the excavator 200 (its own machine). Recognize gestures, etc. performed by employees, workers, etc. Then, the excavator 200 operates the actuator according to the content of the recognized voice, gesture, etc., and moves the undercarriage 1 (left and right crawlers), the upper revolving structure 3, the boom 4, the arm 5, the bucket 6, etc. The drive element may also be driven.

Furthermore, the excavator 200 may automatically operate the actuator regardless of the details of the operator's operation. As a result, the excavator 200 has a function (so-called " ``Autonomous driving function'' or ``machine control function'').

The automatic operation function includes a function that automatically operates driven elements (actuators) other than the driven element (hydraulic actuator) to be operated in response to the operator's operation on the operating device 26 or remote control (so-called "semi-automatic operation function"). ”) may be included. In addition, the automatic operation function includes a function that automatically operates at least a part of multiple driven elements (actuators) on the premise that there is no operator operation on the operating device 26 or remote control (so-called "fully automatic operation function"). may be included. In the excavator 200, when the fully automatic operation function is enabled, the interior of the cabin 10 may be unmanned. Further, the semi-automatic driving function, fully automatic driving function, etc. may include a mode in which the operation details of a driven element (actuator) that is a target of automatic driving are automatically determined according to predefined rules. In addition, for semi-automatic driving functions, fully automatic driving functions, etc., the excavator 200 autonomously makes various judgments, and based on the judgment results, autonomously determines the operation of the driven element (actuator) that is the target of automatic driving. (so-called "autonomous driving function") may be included.

[Shovel configuration]
Next, the configuration of the shovel 200 according to the present embodiment will be described with reference to FIG. 2 in addition to FIG. 1.

FIG. 2 is a block diagram schematically showing an example of the configuration of the shovel 200 according to the present embodiment.

In FIG. 2, the mechanical power line is shown as a double line, the hydraulic line is shown as a thick solid line, the pilot line is shown as a broken line, and the electric drive/control line is shown as a thin solid line.

<Hydraulic drive system>
The hydraulic drive system of the excavator 200 according to the present embodiment includes traveling hydraulic motors 1R and 1L, a swing hydraulic motor 2M, which hydraulically drives driven elements such as the lower traveling body 1, the boom 4, the arm 5, and the bucket 6, respectively. It includes hydraulic actuators such as a boom cylinder 7, an arm cylinder 8, and a bucket cylinder 9. Further, the hydraulic drive system of the excavator 200 according to the present embodiment includes a pump electric motor 12, a main pump 14, and a control valve 17.

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

The main pump 14 supplies hydraulic oil to the control valve 17 through the high-pressure hydraulic line 16 by sucking hydraulic oil from the hydraulic oil tank T and discharging it to the high-pressure hydraulic line 16 . The main pump 14 is driven by the pump electric motor 12. The main pump 14 is, for example, a variable displacement hydraulic pump, and a regulator (not shown) controls the angle (tilting angle) of the swash plate under the control of a shovel controller 30, which will be described later. Thereby, the main pump 14 can adjust the stroke length of the piston and adjust the discharge flow rate (discharge pressure).

Note that the main pump 14 may be driven by power from another power source in addition to the pump electric motor 12. For example, when the boom 4 is lowered or the arm 5 is closed, the energy of the hydraulic oil discharged from the boom cylinder 7 or arm cylinder 8 into the hydraulic oil tank is regenerated by the weight of the boom 4 or arm 5, and the main pump 14 is activated. It may be driven. Specifically, when the boom 4 is lowered or the arm 5 is closed, the energy of the hydraulic oil discharged from the boom cylinder 7 and arm cylinder 8 into the hydraulic oil tank due to the weight of the boom 4 and arm 5 is used to increase the main pump 14. A hydraulic motor disposed coaxially with the rotation axis of the motor may be driven. Also, when the boom 4 is lowered or the arm 5 is closed, the energy of the hydraulic oil discharged from the boom cylinder 7 and arm cylinder 8 into the hydraulic oil tank is regenerated by the weight of the boom 4 and arm 5, and the energy is used to generate electricity in the generator. may be performed. Specifically, when the boom 4 is lowered or the arm 5 is closed, the energy of the hydraulic oil discharged from the boom cylinder 7 and arm cylinder 8 into the hydraulic oil tank due to the weight of the boom 4 and arm 5 is used to generate electricity and power from the generator. The generator may generate electricity by driving a coaxially arranged hydraulic motor. In this case, the power generated by the generator may be supplied to the pump motor 12 or charged to the battery module 19.

The control valve 17 is a hydraulic control device that controls the hydraulic drive system in response to an operator's operation or an operation command corresponding to an automatic driving function. As described above, the control valve 17 is connected to the main pump 14 via the high-pressure hydraulic line 16, and supplies the hydraulic oil supplied 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 a plurality of control valves (direction switching valves) that control the flow rate and flow direction of the hydraulic oil supplied from the main pump 14 to each of the hydraulic actuators. Hydraulic oil supplied from the main pump 14 and passed through the control valve 17 and the hydraulic actuator is discharged from the control valve 17 to the hydraulic oil tank T.

<Electric drive system>
The electric drive system of excavator 200 according to this embodiment includes a pump motor 12, a sensor 12s, and an inverter 18. Further, the electric drive system of the excavator 200 according to the present embodiment includes a high-voltage power source configured by a battery module 19, a power conversion device 100, and the like.

The sensor 12s includes a current sensor 12s1, a voltage sensor 12s2, and a rotation state sensor 12s3.

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 provided, for example, in a power path between the pump motor 12 and the inverter 18. Detection signals corresponding to the currents of each of the three phases of the pump motor 12 detected by the current sensor 12s1 are directly taken into the inverter 18 through the communication line. Further, the detection signal may be taken into the shovel controller 30 through the communication line and input to the inverter 18 via the shovel controller 30.

The voltage sensor 12s2 detects the voltage applied to each of the three phases of the pump motor 12. The voltage sensor 12s2 is provided, for example, in a power path between the pump motor 12 and the inverter 18. Detection signals corresponding to the voltages applied to each of the three phases of the pump motor 12 detected by the voltage sensor 12s2 are directly taken into the inverter 18 through the communication line. Further, the detection signal may be taken into the shovel controller 30 through the communication line and input to the inverter 18 via the shovel controller 30.

The rotation state sensor 12s3 detects the rotation state (eg, rotation position (rotation angle), rotation speed, etc.) of the pump electric motor 12. The rotation state sensor 12s3 is, for example, a rotary encoder or a resolver.

The inverter 18 drives and controls the pump electric motor 12 under the control of the shovel controller 30. The inverter 18 includes, for example, a conversion circuit that converts DC power into three-phase AC power or converts three-phase AC power into DC power, a drive circuit that drives a switch of the conversion circuit, and the operation of the drive circuit. and a control circuit that outputs a control signal (for example, a PWM (Pulse Width Modulation) signal).

The control circuit of the inverter 18 controls the drive of the pump motor 12 while grasping the operating state of the pump motor 12. For example, the control circuit of the inverter 18 grasps the operating state of the pump motor 12 based on the detection signal of the rotation state sensor 12s3. Further, the control circuit of the inverter 18 sequentially controls 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 in the control process). By estimating, the operating state of the pump motor 12 may be grasped.

Note that at least one of the drive circuit and control circuit of the inverter 18 may be provided outside the inverter 18.

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

The power conversion device 100 boosts the power of the battery module 19 or steps down the power from the pump motor 12 via the inverter 18 to cause the battery module 19 to store the power. The power converter 100 switches between a voltage boost operation and a voltage drop operation according to the operating state of the pump motor 12 so that the voltage value of the DC (Direct Current) bus 110 falls within a certain range. Switching control between the step-up operation and the step-down operation of the power converter 100 is executed by the excavator controller 30 based on the detected voltage value of the DC bus 110, the detected voltage value of the battery module 19, and the detected current value of the battery module 19, for example. It's okay to be.

Note that if there is no need 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.

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

Pilot pump 15 supplies pilot pressure to various hydraulic devices (for example, pressure control valve 31) mounted on excavator 200 via pilot line 25. Thereby, the pressure control valve 31 can supply pilot pressure to the control valve 17 according to the operation details (eg, operation amount and operation direction) of the operating device 26 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 operator's operation on the operating device 26. Furthermore, under the control of the shovel controller 30, the pressure control valve 31 can supply a pilot pressure to the control valve 17 according to the content of the remote control specified by the remote control signal. The pilot pump 15 is, for example, a fixed capacity hydraulic pump, and is driven by the pump electric motor 12 as described above.

The operating device 26 is provided within the reach of the operator in the cockpit of the cabin 10, and allows the operator to control the respective driven elements (i.e., the left and right crawlers of the undercarriage 1, the upper revolving structure 3, the boom 4, and the arm 5). , bucket 6, etc.). In other words, the operating device 26 is a hydraulic actuator (for example, travel hydraulic motors 1R, 1L, swing hydraulic motor 2M, boom cylinder 7, arm cylinder 8, bucket cylinder 9, etc.) by which an operator drives each driven element. It is used to operate electric actuators. The operating device 26 is, for example, an electric type, and outputs an electrical signal (hereinafter referred to as an "operating signal") according to the content of an operation by an operator. The operation signal output from the operation device 26 is taken into the shovel controller 30 via the signal line 28. As a result, the shovel controller 30 can control the pressure control valve 31 and control the operation of the driven elements (actuators) of the shovel 200 in accordance with the operator's operation details and operation commands corresponding to the automatic operation function. can.

The operating device 26 includes, for example, levers 26A to 26C. The lever 26A may be configured to be able to accept operations regarding each of the arm 5 (arm cylinder 8) and the upper rotating body 3 (swinging operation), for example, in response to operations in the front-rear direction and left-right direction. The lever 26B may be configured to be able to accept operations regarding each of the boom 4 (boom cylinder 7) and the bucket 6 (bucket cylinder 9), for example, in response to operations in the front-rear direction and left-right direction. The lever 26C may be configured to be able to accept an operation of the lower traveling body 1 (crawler), for example.

Note that when the control valve 17 is composed of an electromagnetic pilot type control valve (directional switching valve), the operation signal of the electric operating device 26 is directly input to the control valve 17, and each hydraulic control valve is configured as an operating device. 26 may be adopted. Further, the operating device 26 may be of a hydraulic pilot type that outputs a pilot pressure depending on the content of the operation. In this case, pilot pressure depending on the operation content is supplied to the control valve 17.

The pressure control valve 31 uses hydraulic oil supplied from the pilot pump 15 through the pilot line 25 under the control of the shovel controller 30 to output a predetermined pilot pressure. A 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 .

<Power system>
The excavator 200 includes a vehicle inlet 101 for normal charging and a vehicle inlet 102 for quick charging as a configuration for charging the battery module 19.

The normal charging vehicle inlet 101 is configured to be connectable to a charging connector (an example of a charging member) provided at the tip of a predetermined cable of an external power source (hereinafter referred to as a "charging cable").

The charging AC-DC converter 103 converts AC power supplied from an external power source via the normal charging vehicle inlet 101 into DC power capable of charging the battery 192, and supplies the DC power to the battery module 19.

The rapid charging vehicle inlet 102 is configured to be connectable to a charging connector (an example of a charging member) provided at the tip of a charging cable of an external power source (for example, a charging station). The vehicle inlet 102 for quick charging is, for example, an inlet for performing quick charging based on CHAdeMO (registered trademark). 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.

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

Battery 192 supplies power to various components within excavator 200. For example, the battery 192 supplies charged (stored) power to the pump electric motor 12. Further, the battery 192 is charged with the power generated by the pump motor 12 (regenerated power).

The battery 192 is charged (accumulated) by being connected to an external power source via a charging cable.

Battery 192 is, for example, a lithium ion battery and has a relatively high output voltage (eg, several hundred volts).

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 based on the output result from a temperature sensor (not shown), and calculates the SOC (State of Charge) of the battery 192. Then, the battery controller 191 outputs the detection result of the temperature sensor and the SOC to the shovel controller 30. Thereby, 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.

The battery controller 191 according to the present embodiment determines whether or not the charging connector is connected to the vehicle inlet 101 for normal charging or the vehicle inlet 102 for quick charging, depending on whether the charging connector is connected to the vehicle inlet 101 for normal charging or the vehicle inlet 102 for quick charging. . Note that the present embodiment does not limit the method of determining whether or not power can be supplied to the determination according to whether or not the charging connector is connected.

Then, when it is determined that the battery controller 191 is connected to an external power source (for example, a charging station) using a charging cable and a charging connector (in other words, when it is determined that power can be supplied), the battery controller 191 connects the external power source (for example, a charging station) Communicate with charging equipment equipped with When the battery controller 191 communicates with the charging equipment and is permitted to supply power from the charging equipment, power supply from an external power source is started.

<Control system>
The control system of shovel 200 according to this embodiment includes a shovel controller 30, an output device 50, and an input device 52.

The output device 50 is provided in 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 installed, for example, at a location within the cabin 10 that is easily visible to the operator, and may display various information images under the control of the shovel controller 30. The display device is, for example, a liquid crystal display or an organic EL (Electroluminescence) display. Further, the output device 50 includes, for example, a sound output device that outputs information to the operator in an auditory manner. The sound output device is, for example, a buzzer, a speaker, or the like.

The input device 52 is provided within the cabin 10 and receives various inputs from the operator. The input device 52 may include, for example, an operation input device that accepts an operation input from an operator. The operation input device includes, for example, a button, a toggle, a lever, a touch panel, a touch pad, and the like. Further, the input device 52 may include, for example, a voice input device that accepts voice input from an operator and a gesture input device that accepts gesture input from the operator. The voice input device includes, for example, a microphone that captures the voice of the operator inside the cabin 10. Further, the gesture input device includes, for example, an indoor camera that can capture an image of the operator's gesture inside the cabin 10. A signal corresponding to an input from the operator accepted by the input device 52 is taken into the shovel controller 30.

Each function of the shovel controller 30 may be realized by arbitrary hardware or a combination of arbitrary hardware and software. For example, the shovel controller 30 each includes a processor such as a CPU (Central Processing Unit), a memory device (main storage device) such as a RAM (Random Access Memory), a nonvolatile auxiliary storage device such as a ROM (Read Only Memory), The computer may be configured mainly with a computer including an interface device for input/output with the outside, and the like.

The shovel controller 30 performs drive control 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 causes the pressure control valve 31 to output a pilot pressure according to the operation content of the operating device 26. . Thereby, the shovel controller 30 can realize the operation of the driven element (hydraulic actuator) of the shovel 200 corresponding to the operation content of the electric operating device 26.

Further, when the shovel 200 is remotely controlled, the shovel controller 30 may perform control related to the remote control, for example. Specifically, the shovel controller 30 may output a control command to the pressure control valve 31 and cause the pressure control valve 31 to output a pilot pressure according to the content of the remote control. Thereby, the shovel controller 30 can realize the operation of the shovel 200 (driven element) corresponding to the content of the remote control.

Further, the shovel controller 30 may perform control related to automatic driving functions, for example. Specifically, the shovel controller 30 may output a control command to the pressure control valve 31 and cause the pressure control valve 31 to act on the control valve 17 with a pilot pressure according to the operation command corresponding to the automatic operation function. Thereby, the shovel controller 30 can realize the operation of the driven element (hydraulic actuator) of the shovel 200 that corresponds to the automatic operation function.

The shovel controller 30 may integrally control the operation of the entire shovel 200 (various devices mounted on the shovel 200).

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

Further, the shovel controller 30 drives the power converter 100 based on the operating state of the operating device 26, for example, and controls the voltage step-up operation and step-down operation of the power converter 100, in other words, the discharge state and charge state of the battery module 19. You may perform switching control with Further, for example, when the shovel 200 is remotely controlled, the shovel controller 30 may drive the power conversion device 100 and control switching between the discharging state and the charging state of the battery module 19 based on the details of the remote control. . Further, for example, when the automatic operation function of the excavator 200 is enabled, the shovel controller 30 drives the power conversion device 100 based on an operation command corresponding to the automatic operation function, and changes the discharge state and charge state of the battery module 19. Switching control may be performed.

<Location of equipment installed on the upper revolving structure>
FIG. 3 is a top view showing an example of the arrangement structure of various devices in the upper revolving structure 3. As shown in FIG. In FIG. 3, the house portion, which is the exterior of the revolving upper structure 3, is omitted in order to expose various devices of the revolving upper structure 3.

As shown in FIG. 3, in this example, the battery module 19 is mounted on the right side of the upper revolving structure 3 in a range extending from the front part to the center part in the longitudinal direction.

A pump electric motor 12 , a main pump 14 , a pilot pump 15 , a control valve 17 , and an inverter 18 are provided in the rear part of the upper revolving structure 3 in a range from the center in the left-right direction to the right end.

The pump electric motor 12 and the inverter 18 are integrally arranged at the center of the rear part of the upper revolving body 3 in the left-right direction. The pump electric motor 12 and the inverter 18 are arranged such that the rotation axis of the pump electric motor 12 extends in the left-right direction and the output shaft extends rightward. For example, the pump electric motor 12 is mounted on the bottom 3B (swivel frame) of the upper revolving structure 3 via a mount member. Specifically, the pump electric motor 12 may be placed relatively close to the bottom portion 3B so that the main pump 14 and pilot pump 15, which are connected in a mechanically drivable manner, are positioned as low as possible. . Thereby, the main pump 14 can be positioned lower than the liquid level inside the hydraulic oil tank T. Therefore, the occurrence of air trapping in the main pump 14 can be suppressed.

The main pump 14 and the pilot pump 15 are arranged adjacent to the right side of the pump motor 12 such that their input shafts are connected to the output shaft of the pump motor 12 . The main pump 14 and the pilot pump 15 are mounted on the bottom portion 3B via the pump motor 12, for example, by being connected to the pump motor 12.

The control valve 17 is arranged at the center in the left-right direction at the rear of the upper revolving structure 3 and above the pump electric motor 12 . For example, the pump electric motor 12 and the main pump 14 are arranged at a relatively low position in the space between the bottom part 3B of the upper revolving body 3 and the house part, and the control valve 17 is arranged at a relatively high position in the space. will be placed in Specifically, a pedestal 17MT provided so as to straddle the pump motor 12 in the front-rear direction is attached to the bottom portion 3B. The control valve 17 is mounted on the pedestal 17MT, thereby being mounted on the bottom portion 3B via the pedestal 17MT.

Note that the control valve 17 may be placed above the main pump 14 or the pilot pump. Moreover, the control valve 17 may be arranged so as to straddle between the pump electric motor 12 and the main pump 14 or the pilot pump 15 in the left-right direction.

A swing hydraulic motor 2M is mounted in the center of the upper revolving body 3.

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

A vehicle inlet 101 for normal charging and a vehicle inlet 102 for quick charging are provided on the side surface of the cabin 10 of the upper revolving structure 3. The vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging are, for example, arranged side by side in the front and rear (X-axis direction: example of the first direction). Further, inside the cabin 10, a charging AC-DC converter 103 is arranged.

A vehicle inlet 101 for normal charging (an example of a charging port) is connected to a charging connector at a connection surface 101A. The rapid charging vehicle inlet 102 (an example of a charging port) is connected to a charging connector at a connection surface 102A.

As shown in FIG. 3, an openable and closable outer flap 150 is provided on the left side of the upper revolving body 3. In the interior space 155 when the outer flap 150 is opened, there is a first inner flap 151 (an example of a first cover member) that covers the connection surface 101A of the vehicle inlet 101 for normal charging, and a connection surface of the vehicle inlet 102 for quick charging. A second inner flap (an example of a second cover member) 152 is provided to cover 102A.

The first inner flap (an example of a first cover member) 151 and the second inner flap (an example of a second cover member) can be opened and closed. For example, when connecting the charging connector to the vehicle inlet 101 for normal charging, the first inner flap 151 is left open. Furthermore, when connecting the charging connector to the vehicle inlet 102 for quick charging, the second inner flap 152 is kept open.

<Explanation regarding opening and closing of the outer flap provided on the upper rotating body>
FIG. 4 is an explanatory diagram showing opening and closing of the outer flap 150 provided on the upper revolving body 3 of the excavator 200 according to the present embodiment. As shown in FIG. 4(A), the outer flap 150 received on the left side of the upper revolving structure 3 protects the appearance of the excavator 200, and also protects the vehicle inlet 101 for normal charging and the vehicle inlet 101 for quick charging. It is provided to protect the equipment from the external environment. In this embodiment, an example will be described in which an outer flap 150 that matches the appearance of the excavator 200 is provided as an outer cover member for covering a plurality of inner flaps. However, this embodiment does not limit the shape of the outer cover member, and any shape may be used as long as the cover member can cover a plurality of inner flaps.

As shown in FIG. 4(B), when the outer flap 150 is opened, a first inner flap 151 and a second inner flap 152 are disposed. 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 quick charging vehicle inlet 102.

The example shown in FIG. 4B shows a case where the second inner flap 152 is opened and the charging connector 401 for quick charging is connected to the vehicle inlet 102 for quick charging. In the example shown in FIG. 4(B), when the second inner flap 152 is opened, the outer circumference 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 be explained.

<Description of multiple inner flaps and vehicle inlet>
FIG. 5 is a diagram showing the arrangement relationship between the plurality of inner side flaps 151 and 152 and the vehicle inlet according to this embodiment. In the example shown in FIG. 5, the second inner flap 152 is shown in an open state.

As shown in FIG. 5, the first inner flap 151 (an example of a cover member) includes a first locking member 151A and a first rotation mechanism 151B, and covers the connection surface 101A of the normal charging vehicle inlet 101. It is a cover member that can be opened and closed.

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 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. good. 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.

The first locking member 151A (an example of a locking member) switches whether or not to fix the position of the first inner flap 151 while covering the connection surface 101A of the normal charging vehicle inlet 101 (closed state). It is a possible member. For example, by pressing down the first locking member 151A, the fixation (holding) of the first locking member 151A by the locking mechanism provided on the connection surface 101A is released. When the fixation is released, the spring member of the first rotation mechanism 151B may pop up the first inner flap 151.

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

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 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. good. 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.

The second locking member 152A (an example of a locking member) switches whether or not to fix the position of the second inner flap 152 while covering the connection surface 102A of the quick charging vehicle inlet 102 (closed state). It is a possible member. For example, by pressing down the second locking member 152A, the fixation (holding) of the second locking member 152A by the locking mechanism 102B provided on the connection surface 102A is released. When the fixation is released, the spring member of the second rotation mechanism 152B may pop up the second inner flap 152.

The example shown in FIG. 5 shows a case where the second inner flap 152 is in an open state. The second inner flap 152 is held open approximately 90 degrees by a spring member of the second rotation mechanism 152B.

The connection surface 102A of the quick 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 state.

As shown in FIG. 5, the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging are provided close to each other. The positional relationship between the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging will be explained.

The first rotation mechanism 151B and the second rotation mechanism 152B are provided between the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging. In addition, the first rotation mechanism 151B and the second rotation mechanism 152B are arranged in such a manner that the first inner flap 151 and the second inner flap 152 are not opened at the same time. That is, in this embodiment, the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging are provided close to each other. Moreover, since the first rotation mechanism 151B and the second rotation mechanism 152B are provided between the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging, among the first inner flap 151 and the second inner flap 152, If one opens, move closer to the other. This can prevent the other of the normal charging vehicle inlet 101 and the quick charging vehicle inlet 102 from opening, thereby suppressing the simultaneous opening of a plurality of charging vehicle inlets and improving safety.

That is, when either one of the first inner flap 151 and the second inner flap 152 is opened, at least a portion of the one inner flap in the opened state is different from the structure when the other inner flap is opened. exists within the moving range. That is, one inner flap in an open state is arranged so as to prevent the other inner flap from being in an open state to the extent that the charging connector can be connected. This prevents the plurality of inner flaps from being simultaneously opened to the extent that the charging connector can be connected.

In the example shown in FIG. 5, when attempting to open the first inner flap 151 after opening the second inner flap 152 by 90 degrees or more, the outer surface of the first inner flap 151 (normal charging vehicle inlet 101 (the surface opposite to the surface in contact with) or the first rotating mechanism 151B comes into contact with the outer circumference of the second inner flap 152, thereby preventing the first inner flap 151 from opening. Thereafter, the first inner flap 151 may be fixed to the first locking member 151A by being pushed by the second inner flap 152, etc., and may be in the closed state again.

Similarly, when attempting to open the second inner flap 152 after opening the first inner flap 151 by 90 degrees or more, the outer surface of the second inner flap 152 (the surface in contact with the rapid charging vehicle inlet 102 (opposite surface) or the second rotation mechanism 152B comes into contact with the outer circumference of the first inner flap 151, thereby preventing the second inner flap 152 from opening. Thereafter, the second inner flap 152 may be fixed to the second locking member 152A by being pushed by the first inner flap 151, etc., and may be in the closed state again.

That is, in the present embodiment, the rotation axis of the rotation mechanism 152B of the second inner flap 152 is larger than the rotation axis of the rotation mechanism 151B of the first inner flap 151 than the rotation axis of the normal charging vehicle inlet 101 covered by the first inner flap 151. is located close to. Similarly, the rotation axis of the rotation mechanism 151B of the first inner flap 151 is located closer to the quick charging vehicle inlet 102 covered by the second inner flap 152 than the rotation axis of the rotation mechanism 152B of the second inner flap 152. exist. As a result, when any one of the plurality of inner flaps is opened, the outer periphery of the opened inner flap (an example of at least a part of the configuration) is changed when the other inner flap is opened. Exists within the moving range of This prevents a plurality of inner flaps 151 and 152 from being opened at the same time.

As shown in FIG. 5, when the second inner flap 152 is opened, 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 FIG. It's getting longer. The first inner flap 151 also has substantially the same length as the second inner flap 152. Therefore, when the first inner flap 151 or the second inner flap 152 is opened, when the outer flap 150 is closed, the outer circumference of the inner flap (the first inner flap 151 or the second inner flap 152) in the open state is In other words, there is a part of the inner flap in the open state in the range in which the outer flap 150 moves. Therefore, when the first inner flap 151 or the second inner flap 152 is open, the outer flap 150 is prevented from closing. Thereby, when closing the outer flap 150, it is possible to suppress forgetting to close the inner flap (the first inner flap 151 or the second inner flap 152).

Further, if the outer flap 150 is not closed, the operator of the excavator 200 may be notified. For example, the output device 50 (display device) in the cabin 10 of the excavator 200 may be notified that the outer flap 150 is not closed. Further, in this embodiment, the shovel 200 may notify the operator's communication terminal that the outer flap 150 is not closed.

<Transition of open/closed states of multiple inner flaps>
FIG. 6 is a diagram illustrating the transition of the opening and closing states of the first inner flap 151 and the second inner flap 152 according to the present embodiment. In FIG. 6, in order to make each state easier to understand, an example is shown in which the rotation axis of the first rotation mechanism 151B and the rotation axis of the second rotation mechanism 152B are shown.

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

In state 1601, when the first inner flap 151 is opened, a transition is made to state 1602. In state 1602, the first inner flap 151 is in an open state and the second inner flap 152 is in a closed state. Therefore, the charging connector can be connected to the vehicle inlet 101 for normal charging. In state 1602, since the outer circumferential portion of the first inner flap 151 exists within the movement range of the second inner flap 152 based on the rotation axis of the second rotation mechanism 152B, opening of the second inner flap 152 is suppressed. be done. In order to open the second inner flap 152, it is necessary to close the first inner flap 151 and transition to state 1601.

In state 1601, when the second inner flap 152 is opened, a transition is made to state 1603. In state 1603, the second inner flap 152 is in an open state and the first inner flap 151 is in a closed state. Therefore, the charging connector can be connected to the vehicle inlet 102 for quick charging. In state 1603, since the outer circumference of the second inner flap 152 exists within the movement range of the first inner flap 151 based on the rotation axis of the first rotation mechanism 151B, opening of the first inner flap 151 is suppressed. be done. In order to open the first inner flap 151, it is necessary to close the second inner flap 152 and transition to state 1601.

In this embodiment, the combination of the first inner flap 151 and the first rotation mechanism 151B and the combination of the second inner flap 152 and the second rotation mechanism 152B are arranged in a nested manner. Thereby, the first inner flap 151 and the second inner flap 152 can be prevented from being opened at the same time. Further, in this embodiment, although they are arranged in a nested manner, the combination of the first inner flap 151 and the first rotation mechanism 151B and the combination of the second inner flap 152 and the second rotation mechanism 152B are different configurations. It can be done. Therefore, maintenance can be performed on a combination-by-combination basis, making maintenance work easier.

In this embodiment, for each of the inner flaps, the rotation axis of the rotation mechanism of one inner flap is closer to the charging vehicle inlet covered by the other inner flap than the rotation axis of the rotation mechanism of the other inner flap. exists in a nearby location. Therefore, when one inner flap is rotated 90 degrees or more in the front-rear direction (X-axis direction: example of the first direction), one inner flap becomes the reference for rotating the other inner flap. is closer to the other inner flap than the axis of rotation. Specifically, when one inner flap is rotated to open 90 degrees or more, the one inner flap moves between the other inner flap and the other rotation axis in the front-rear direction. . Due to this arrangement, when one of the inner flaps is opened more than 90 degrees, the other inner flap exists within the rotation range of the other inner flap based on the rotation axis. It is possible to prevent the inner flap from being left open. Therefore, since a plurality of inner flaps are prevented from being opened at the same time, safety can be improved.

(Modification 1)
In the embodiment described above, an example is shown in which the first inner flap 151 and the second inner flap 152 are prevented from being opened at the same time, depending on the positional relationship between the first rotation mechanism 151B and the second rotation mechanism 152B. Specifically, for each of the inner flaps, the rotation axis of the rotation mechanism of one inner flap is closer to the charging vehicle inlet covered by the other inner flap than the rotation axis of the rotation mechanism of the other inner flap. exists in position. Therefore, when one inner flap is opened by 90 degrees or more, one inner flap exists within the rotation range of the other inner flap, so opening of the other inner flap is suppressed. However, this embodiment shows one aspect of the positional relationship between the first rotation mechanism 151B and the second rotation mechanism 152B, and other aspects may be used.

Therefore, in Modification 1, a case will be described in which the first rotation mechanism and the second rotation mechanism share a rotation axis. In other words, in this modification, since the rotation axes of the first rotation mechanism and the second rotation mechanism are shared, one inner flap can be rotated by 90 degrees or more in the front-rear direction (X-axis direction: example of the first direction). When the other inner flap is rotated, a part of the inner flap (for example, the outer periphery) is closer to the other inner flap than the rotation axis that is the reference for rotating the other inner flap. This is an example of restricting opening.

FIG. 7 is a diagram illustrating the transition of opening and closing of the first inner flap 251 and the second inner flap 252 according to this modification. In the example shown in FIG. 7, the first inner flap 251 has a first rotation mechanism that rotationally moves the first inner flap 251, and the second inner flap 252 has a second rotation mechanism that rotationally moves the second inner flap 252. It has a rotation mechanism. 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 serving as a reference for rotational movement. In this modification, by sharing the rotation axis 253B, the axial directions indicated by the rotation axis, which serve as a reference for rotational movement of the first inner flap 251 and the second inner flap 252, are made to substantially match.

In this modification, a case will be described in which the first inner flap 251 and the second inner flap 252 share the 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 a rotation axis. As long as the axial directions of the rotation axes of the first inner flap 251 and the second inner flap 252 substantially match, they may be provided separately.

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

In state 1701, when the first inner flap 251 is opened by 90 degrees or more, the state changes to state 1702. In state 1702, the first inner flap 251 is opened by 90 degrees or more, and the second inner flap 252 is closed. Therefore, the charging connector can be connected to the vehicle inlet 101 for normal charging. In state 1702, the outer peripheral portion of the first inner flap 251 exists within the movement range of the second inner flap 252 with respect to the rotation axis 253B, so opening of the second inner flap 252 is suppressed. In order to open the second inner flap 252, it is necessary to close the first inner flap 251 and transition to state 1701.

In state 1701, when the second inner flap 252 is opened by 90 degrees or more, the state changes to state 1703. In state 1703, the second inner flap 252 is opened by 90 degrees or more, and the first inner flap 251 is closed. Therefore, the charging connector can be connected to the vehicle inlet 102 for quick charging. In state 1703, the outer circumference of the second inner flap 252 exists within the movement range of the first inner flap 251 with respect to the rotation axis 253B, so opening the first inner flap 251 is suppressed. 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.

In this modification, since the axial directions of the rotation axes of the first inner flap 251 and the second inner flap 252 are substantially the same, when one of the inner flaps is opened, it is difficult to open the other. It can be suppressed. Thereby, safety can be improved similarly to the embodiment described above.

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 reducing costs.

(Modification 2)
Modification 2 shows another aspect in which the first inner flap and the second inner flap are prevented from being opened at the same time. In this modification, when one inner flap is rotated 90 degrees or more in the front-rear direction (X-axis direction: example of the first direction), the protrusion provided on the one inner flap is Since it is closer to the other inner flap than the rotation axis that is the reference for rotating the inner flap, opening of the other inner flap is suppressed.

FIG. 8 is a diagram showing the arrangement relationship of a plurality of inner flaps according to this modification. In the example shown in FIG. 8, the first inner flap 351 and the second inner flap 352 are shown in a closed state.

As shown in FIG. 8, the first rotation mechanism of the first inner flap 351 functions to rotate and move the first inner flap 351 based on the rotation axis 351B. Similarly, the second rotation mechanism of the second inner flap 352 functions to rotate and move the second inner flap 352 with reference to the rotation axis 352B.

In the example shown in FIG. 8, the rotation axis 351B, which is the reference for the rotational movement of the first inner flap 351, and the rotational axis 352B, which is the reference for the rotational movement of the second inner flap 352, are different from those of the embodiment and modification described above. Similarly, it is provided between the vehicle inlet 101 for normal charging and the vehicle inlet 102 for quick charging. 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. For this reason, when one of the inner flaps is opened as in the above-described embodiments and modifications, the outer circumference of the open inner flap prevents the other inner flap from opening. is difficult.

Therefore, in this modification, the first inner flap 351 is provided with a first protrusion 351C on the opposite surface (outer surface) to the surface in contact with the vehicle inlet 101 for normal charging, and the second inner flap 352 is provided with a first protrusion 351C for quick charging. A second protrusion 352C is provided on the opposite surface (outer surface) to the surface in contact with the vehicle inlet 102.

When either the first inner flap 351 or the second inner flap 352 is opened 90 degrees or more, one of the inner flaps (the first inner flap 351 or the second inner flap 352) is opened. The protrusion (the first protrusion 351C or the second protrusion 352C) is arranged so as to be within the range that moves when the other flap (the second inner flap 352 or the first inner flap 351) is opened. There is. Thereby, when one inner flap is opened by 90 degrees or more, it is possible to suppress the other inner flap from being opened.

FIG. 9 is a diagram illustrating the transition of the opening and closing states of the first inner flap 351 and the second inner flap 352 according to this modification. In the example shown in FIG. 9, the first inner flap 351 has a first rotation mechanism that rotates the first inner flap 351 with reference to the rotation axis 351B. The second inner flap 352 has a second rotation mechanism that rotates the second inner flap 352 with reference to the rotation axis 352B.

The first inner flap 351 covers the connection surface 101A of the vehicle inlet 101 for normal charging, and the second inner flap 352 covers the connection surface 102A of the vehicle inlet 102 for quick charging.

In state 1901, when the first inner flap 351 is opened by 90 degrees or more, the state changes to state 1902. In state 1902, the first inner flap 351 is opened by 90 degrees or more, and the second inner flap 352 is closed. Therefore, the charging connector can be connected to the vehicle inlet 101 for normal charging. In state 1902, the first protrusion 351C provided on the first inner flap 351 is in contact with the second protrusion 352C provided on the second inner flap 352 while being pressed in the -X axis direction. ing. Therefore, opening of the second inner flap 352 is suppressed. In order to open the second inner flap 352, it is necessary to close the first inner flap 351 and transition to state 1901.

In state 1901, when the second inner flap 352 is opened by 90 degrees or more, the state changes to state 1903. In state 1903, the second inner flap 352 is opened by 90 degrees or more, and the first inner flap 351 is closed. Therefore, the charging connector can be connected to the vehicle inlet 102 for quick charging. In state 1903, the second protrusion 352C provided on the second inner flap 352 contacts the first protrusion 351C provided on the first inner flap 351 while pushing it in the +X-axis direction. There is. Therefore, opening of the first inner flap 351 is suppressed. In order to open the first inner flap 351, it is necessary to close the second inner flap 352 and transition to state 1901.

In this modification, the first inner flap 351 is provided with a first protrusion 351C, and the second inner flap 352 is provided with a second protrusion 352C. As a result, even if there is a gap between the rotation axis 351B of the first protrusion 351C and the rotation axis 352B of the second inner flap 352, when one inner flap is open, the other inner flap is opened. This can prevent it from becoming open. In other words, in this modification, the plurality of inner flaps can be simultaneously opened by providing a protrusion on each of the plurality of inner flaps, even if the rotation axis and the inner flaps are not arranged in the same manner as in the embodiment and modification described above. It is possible to prevent the situation from occurring.

In this modification, the height of the first protrusion 351C on the first inner flap 351 and the height of the second protrusion 352C on the second inner flap 352 are longer than the distance between the plurality of rotation axes. It is set up like this. Thereby, the protrusion of one inner flap can reach the rotation range of the other inner flap.

In this modification, the position of the first protrusion 351C provided on the first inner flap 351 and the position of the second protrusion 352C provided on the second inner flap 352 are shown as an example, and The position where the protrusion is provided is not limited. For example, the protrusion may be provided further near the rotation axis than in the example shown in FIGS. 8 and 9. Moreover, the size and shape of the protrusion are also shown as an example, and the size and shape of the protrusion are not limited. In other words, the position, size, and shape may be determined so that the protrusion provided on one of the flaps in the opened state exists within the range of movement when the other flap is opened.

Further, the protrusion may be made of resin or the like that is integrally molded with the inner flap, but it may not be integrally molded with the inner flap, and may be formed of any material.

In this modification, in order to inhibit the movement of other inner flaps with a protrusion provided for each inner flap, a 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. As a result, maintenance can be performed on a combination-by-combination basis, making maintenance work easier.

The embodiments and modifications described above are examples of the shape of the inner flap, and are not limited to the shape described above. The inner flap may have any shape as long as it can prevent dust, dirt, liquid, etc. from entering the vehicle inlet 101 for normal charging or the vehicle inlet 102 for quick charging.

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

The above-described embodiments and modified examples are examples of the rotation shafts and protrusions of the first inner flap and the second inner flap, and other embodiments may be used. For example, a protrusion may be provided on each of the first inner flap and the second inner flap while sharing a rotation axis.

In the above-described embodiments and modifications, examples have been described in which the rotation mechanism of the first inner flap and the second inner flap includes a spring member for moving the inner flap to a predetermined position. The spring member may be provided, for example, inside the rotating shaft (hinge) of the rotation mechanism, but may be provided at any position as long as it is possible to move the inner flap to a predetermined position.

Furthermore, the embodiments and modifications described above are not limited to examples in which the rotation mechanism includes a spring member, and the rotation mechanism may not include a spring member. In this case, a person may work 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, similar to the above-described embodiments and modifications, rotational movement to the open state of the other inner flap is inhibited. This produces the same effects as the above-described embodiment and modification.

The spring member included in the rotation mechanism shown in the embodiment and modified example described above is shown as an example of an elastic member that rotates the inner flap. Any member other than the spring member may be used as long as it is an elastic member that rotationally moves the inner flap.

In the present embodiment and modified example, an example will be 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.

In the above-described embodiments and modifications, examples have been described in which one of the first inner flap and the second inner flap is opened by 90 degrees or more to prevent the other flap from being opened. However, in the above-described embodiments and modifications, the opening angle of one inner flap is not limited to 90 degrees or more, and may be any other angle. In other words, the angle at which the inner flap opens may be any angle as long as it is possible to prevent the other inner flap from opening while one inner flap is opened to the extent that the charging connector can be connected.

<Effect>
In the embodiment and modification described above, it is suppressed that a plurality of inner flaps (the first inner flap 151 and the second inner flap 152) are opened at the same time. Thereby, it is possible to suppress simultaneous connection of the charging connector to each of the plurality of charging vehicle inlets (the normal charging vehicle inlet 101 and the quick charging vehicle inlet 102). In addition, by keeping one inner flap open and the other inner flap closed, dust, dust, liquid, etc. can be prevented from entering the charging vehicle inlet covered by the other inner flap. It can be suppressed. Thereby, safety can be improved.

In the embodiments and modifications described above, when opening any one of the plurality of inner flaps (the first inner flap 151 and the second inner flap 152), the spring member (an example of an elastic member) ) moves the inner flap to a position where the charging connector can be connected. Thereby, the work load for connecting the charging connector can be reduced. Furthermore, when one inner flap moves to a position where the charging connector can be connected, a part of the one inner flap suppresses the other flap from being opened. This can improve safety.

In addition, when the inner flap is moved to a position where the charging connector can be connected and the inner flap is opened to the position, the inner flap prevents the outer flap from closing. In other words, in order to close an outer flap, it is necessary to close a plurality of inner flaps. In other words, it is possible to prevent forgetting to close the inner flap when closing the outer flap. Thereby, safety can be improved.

Each of the plurality of inner flaps (the first inner flap and the second inner flap) has a lock that can switch whether or not to fix the position of the inner flap while covering the charging vehicle inlet (an example of a charging port). It has a member for use. This can prevent the inner flaps (the first inner flap and the second inner flap) from opening unintentionally. In particular, each of the plurality of inner flaps has a locking member even when the rotation mechanism is provided with a spring member. ) can be fixed with the inner flap covered. As a result, the inner flap covering the charging vehicle inlet (normal charging vehicle inlet 101 or quick charging vehicle inlet 102) automatically opens to prevent dust, dirt, or liquid from entering the charging vehicle inlet. can be suppressed to improve safety.

Although the embodiments have been described in detail above, the present disclosure is not limited to such specific embodiments, and various modifications and changes can be made within the scope of the gist described in the claims.

200 Excavator 1 Lower traveling body 2 Swivel mechanism 3 Upper rotating body 4 Boom 5 Arm 6 Bucket 7 Boom cylinder 8 Arm cylinder 9 Bucket cylinder 10 Cabin 12 Pump motor 14 Main pump 19 Battery module 191 Battery controller 192 Battery 30 Shovel controller 101 Normal Charging vehicle inlet 102 Quick charging vehicle inlet 101A, 102A Connection surface 103 Charging AC-DC converter 150 Outer flap 151, 251, 351 First inner flap 152, 252, 352 Second inner flap 151A First locking member 152A Second locking member 151B First rotation mechanism 152B Second rotation mechanism 253B, 351B, 352B Rotation shaft

Claims (10)

electric motor and
a battery that supplies power to the electric motor;
a plurality of charging ports that supply power to the battery;
a plurality of cover members that can be opened and closed to cover each of the plurality of charging ports;
When one of the plurality of cover members is opened, at least a portion of the structure of one of the plurality of cover members in the open state moves when the other cover member of the plurality of cover members is opened. is configured to exist within the range that
Electric excavator. further comprising an outer cover member that covers the plurality of cover members,
When at least one cover member among the plurality of cover members is in an open state, the above-mentioned cover member is arranged such that a part of the open cover member exists in a range of movement when closing the outer cover member. an outer cover member is provided;
The electric excavator according to claim 1. Each of the plurality of cover members further includes a rotation mechanism that rotates the cover member,
The rotation mechanism includes an elastic member capable of rotationally moving the cover member to a predetermined position.
The electric excavator according to claim 1 or 2. Each of the plurality of cover members further includes a locking member that can switch whether or not to fix the position of the cover member while covering the charging port.
The electric excavator according to any one of claims 1 to 3. the plurality of charging ports are arranged closely;
Each of the plurality of cover members is provided with a rotation axis that serves as a reference for rotational movement,
The plurality of rotating shafts are provided between the plurality of charging ports,
The electric excavator according to any one of claims 1 to 4. The plurality of charging ports are arranged in a first direction,
When the one cover member is rotated, the configuration of the part of the one cover member is such that the configuration of the part of the one cover member is larger than the rotation axis in the first direction, which is a reference for rotating the other cover member. configured to approach the other cover member;
The electric excavator according to claim 5. When the one cover member is opened by 90 degrees or more, the part of the one cover member is configured to exist within a range that moves when the other cover member is opened. ,
The electric excavator according to claim 5 or 6. The rotation axis of the one cover member is provided at a position closer to the charging port covered by the other cover member than the rotation axis of the other cover member,
The rotation axis of the other cover member is located closer to the charging port covered by the one cover member than the rotation axis of the one cover member.
The electric excavator according to any one of claims 5 to 7. The rotating shafts of each of the plurality of cover members are configured such that the axial directions thereof substantially coincide with each other.
The electric excavator according to any one of claims 5 to 7. Each of the plurality of cover members has a protrusion on a surface opposite to a surface in contact with the charging port,
When the one cover member is opened with respect to the rotation axis, the protrusion of the one cover member is configured to exist in a range that moves when the other cover member is opened. ing,
The electric excavator according to any one of claims 5 to 7.

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