JP7213045B2 - Work vehicle and vehicle charging system - Google Patents

Description

The present invention relates to work vehicles and vehicle charging systems.

Patent Document 1 discloses an electric construction machine having a plurality of couplers (connecting members) to which an external power supply is connected. A plurality of couplers are arranged side by side. Only one of the connecting members of the plurality of couplers is open to the outside by a slide plate that is slidable in the direction in which they are arranged side by side.

Japanese Patent Application Laid-Open No. 2012-1889

By the way, in the technique of Patent Document 1, since the slide plate is movable, the slide plate is worn, resulting in an increase in maintenance frequency.

SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and provides a work vehicle capable of improving maintainability while avoiding simultaneous connection of external power sources to a plurality of couplers. The object is to provide a charging system.

A work vehicle according to one aspect of the present invention includes a vehicle body and a charging port accessible from the outside with respect to the vehicle body, wherein the charging port has an end facing the outside and is connected to an external power supply. Each of the connecting connectors is connectable from the end side and has a first coupler and a second coupler arranged side by side so as to be adjacent to each other, and the end of the first coupler and the second coupler The end portion is opposed to each other in the side-by-side direction of the first coupler and the second coupler, and the first plane is provided on one side of the base portion in the side-by-side direction. The second plane extends rearward as it goes to one side, and the second plane is provided in a portion of the base on the other side in the side-by-side arrangement direction and goes rearward as it goes to the other side in the side-by-side arrangement direction. wherein the first coupler protrudes from the first plane such that a first axis extending in a direction in which the connector is connected to the first coupler is orthogonal to the first plane, The second coupler protrudes from the second plane such that a second axis extending in a direction in which the connector is connected to the second coupler is orthogonal to the second plane.

A vehicle charging system according to one aspect of the present invention includes the work vehicle described above, the normal charging connector and the quick charging connector connected to the external power supply, and the normal charging connector is connected to the normal charging coupler. connection of the quick charge connector to the quick charge coupler is prevented by the normal charge connector, and when the quick charge connector is connected to the quick charge coupler, the quick charge connector prevents the normal charge coupler from being connected to the quick charge coupler. connection of the fast charging connector to the is blocked.

According to the work vehicle and vehicle charging system of the above aspect, it is possible to improve maintainability while avoiding simultaneous connection of external power sources to a plurality of couplers.

1 is a side view of an electric hydraulic excavator according to an embodiment of the present invention; FIG. FIG. 2 is a schematic plan view showing the internal structure of the upper revolving body of the electric hydraulic excavator according to the embodiment of the present invention; FIG. 2 is a schematic side view showing the internal structure at the rear and upper parts of the upper revolving body of the electric hydraulic excavator according to the embodiment of the present invention; 1 is a plan view of a charging port of an electric hydraulic excavator according to an embodiment of the present invention; FIG. 1 is a perspective view of a charging port of an electric hydraulic excavator according to an embodiment of the present invention; FIG.

An embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 5. FIG.
<Electric hydraulic excavator (electric construction machine)>
As shown in FIG. 1 , an electric hydraulic excavator 200 as an example of an electric construction machine includes a lower traveling body 210 and an upper revolving body (body) 220 . Hereinafter, the direction in which gravity acts when the electric hydraulic excavator 200 is installed on a horizontal plane is referred to as the vertical direction.

<Lower running body>
Undercarriage 210 has a pair of crawler belts 211 . These crawler belts 211 are driven by a traveling hydraulic motor (not shown) to cause the lower traveling body 210 to travel. The running direction of the lower running body 210 is referred to as the front-rear direction, the forward side in the running direction (the normal forward direction, the side where the blade 212 described below is provided) is referred to as the front, and the rear in the running direction, which is the opposite side to the front, is referred to as the rear. In addition, when viewed in the forward direction, the right side is called "right", and the left side is called "left". A pair of crawler belts 211 are provided on the left and right sides.
A blade 212 is provided on the front portion of the lower traveling body 210 as a blade plate extending in the vehicle width direction of the lower traveling body 210 (hereinafter simply referred to as the width direction). The blade 212 is adjustable in height position by being driven by a hydraulic cylinder.

<Upper revolving body>
The upper swing body 220 is provided on the lower traveling body 210 . The upper revolving structure 220 is connected to the lower running structure 210 via a swing circle 215 . The swing circle 215 has an annular shape centered on the pivot axis extending in the vertical direction. The swing circle 215 allows the upper swing body 220 to swing about the swing axis with respect to the lower travel body 210 .

The upper revolving body 220 includes a work machine 221, an operating space 80, a revolving frame 10, a portal frame 20, a battery unit 40, an inverter 36, a power delivery unit 37, an electric motor 39, a hydraulic pump 51, a hydraulic valve 52, and operation pattern switching. A part 53 , a turning motor 70 , a cooling unit 61 , an auxiliary battery 64 , a protector 95 , an exterior cover 100 and a charging port 140 are provided.

<Work machine>
The working machine 221 has a boom 222, an arm 223 and a bucket 224, as shown in FIG. The work machine 221 performs various works such as excavation by driving the boom 222, the arm 223, and the bucket 224 by respective hydraulic cylinders. Hereinafter, the width direction of the upper revolving body 220 when the work implement 221 faces the front of the electric hydraulic excavator 200 is simply referred to as the "width direction." Further, the direction toward the center in the width direction is referred to as the "inner side in the width direction", and the direction toward the left side (one side in the width direction) or the right side (the other side in the width direction) from the center in the width direction is referred to as the "outer side in the width direction".

<Driving space>
The operating space 80 is a portion where an operator rides and the electric hydraulic excavator 200 is operated by the operator. As shown in FIG. 1, the operating space 80 is provided in the leftward portion of the front and upper part of the upper revolving body 220. The operating space 80 includes a floor panel 81 forming a floor surface, and has a driver's seat 84 provided behind and above. In addition, the operating space 80 is provided with a console box housing a controller and the like, various levers, and pedals. A canopy 90 covers the upper side of the operating space 80 . The rear portion of the canopy 90 is fixed to the upper end of the portal frame 20 .

<Rotating frame>
As shown in FIG. 2, the revolving frame 10 has a base plate 11, a horizontal partition plate 12, a front vertical partition plate 13, a front reinforcing plate 14, a bracket 15, and a rear vertical partition plate 16 as a spacer.

<Base plate>
As shown in FIG. 2, the base plate 11 is a plate-like member extending in the horizontal direction. That is, the base plate 11 extends in the front-rear direction and width direction. The lower surface of base plate 11 is fixed on swing circle 215 . Thereby, the swing frame 10 is supported by the swing circle 215 from below.

<Horizontal partition plate>
The horizontal partition plate 12 is a plate-shaped member that protrudes upward from the upper surface of the base plate 11 and extends in the width direction. The horizontal partition plate 12 extends with the width direction as its longitudinal direction. The lateral partition plate 12 is arranged in a portion on the front side of the center of the base plate 11 in the front-rear direction. The horizontal partition plate 12 extends over both widthwise end portions of the base plate 11, that is, over both left and right end portions.

<Front vertical partition plate>
The front vertical partition plate 13 is a plate-shaped member that protrudes from the upper surface of the base plate 11 and extends in the front-rear direction. A pair of front vertical partition plates 13 are provided in front of the horizontal partition plate 12 on the upper surface of the base plate 11 and are spaced apart from each other in the width direction. That is, a pair of front vertical partition plates 13 are provided with an interval left and right. The pair of front vertical partition plates 13 are arranged on the inner side in the width direction of both ends of the base plate 11 in the width direction.

The front vertical partition plate 13 is connected to the front-facing surface of the horizontal partition plate 12 at its rear end. That is, the front vertical partition plate 13 is provided so as to extend forward from the horizontal partition plate 12 . As shown in FIG. 2, the pair of front vertical partition plates 13 are provided so as to approach each other as they go forward from the rear end portion where they are connected to the horizontal partition plate 12 .

<Front reinforcement plate>
The front reinforcement plate 14 is integrally fixed to the pair of front vertical partition plates 13 at the front of the pair of front vertical partition plates 13 .
<Bracket>
Brackets 15 are fixed to the front ends of the pair of front vertical partition plates 13 and front reinforcement plates 14 . A working machine 221 is supported by the base plate 11 via the bracket 15 .

<Rear Vertical Partition Plate>
The rear vertical partition plate 16 is a plate-shaped member that protrudes from the upper surface of the base plate 11 and extends in the front-rear direction. A pair of rear vertical partition plates 16 are provided behind the horizontal partition plate 12 on the upper surface of the base plate 11 and are spaced apart from each other in the width direction. That is, a pair of rear vertical partition plates 16 are provided on the left and right. The widthwise interval between the pair of rear vertical partition plates 16 is greater than the widthwise interval between the pair of front vertical partition plates 13 at their rear ends.

<gate type frame>
The portal frame 20 is fixed on the base plate 11 as shown in FIG. The portal frame 20 has a pair of pillars 21 and beams 22 .

The pair of pillars 21 are provided behind the lateral partition plate 12 on the base plate 11 and spaced apart in the width direction. The column portion 21 extends vertically and has its lower end fixed to the base plate 11 .
The beam portion 22 extends across the upper ends of the pair of column portions 21 in the width direction. The beam portion 22 is provided above the upper surface of the base plate 11 with a space therebetween. A pair of column portion 21 and beam portion 22 are integrally fixed. The portal frame 20 has an inverted U shape when viewed from the front-rear direction.

<Battery unit>
The battery unit 40 is a power source for the electric hydraulic excavator 200 . As shown in FIG. 2 , the battery unit 40 is provided near the center of the rear portion on the base plate 11 . The battery unit 40 is arranged on the pair of rear vertical partition plates 16 . The battery unit 40 is arranged such that the front part thereof passes through the portal frame 20 .
As shown in FIGS. 2 and 3, the battery unit 40 includes a battery box 41 and a sensor box 44. As shown in FIG.

<Battery box>
The battery box 41 accommodates a large number of batteries inside. As shown in FIG. 3, the battery box 41 is configured by vertically stacking a plurality of battery cases 42 . Inside the plurality of battery cases 42, a plurality of batteries are provided so as to be arranged. A plurality of batteries arranged in each battery case 42 are electrically connected in the entire battery box 41 to form a battery circuit.

<Sensor box>
The sensor box 44 is provided so as to protrude further rearward from the back surface of each battery case 42 . The sensor box 44 has a box shape extending in the width direction. Various sensors, contactors, and the like are housed inside the sensor box 44 . A service plug 44a is provided in the uppermost sensor box 44 so as to protrude from the sensor box 44 to the rear. By pulling out the service plug 44a, the battery circuit of the battery unit 40 is cut off.

<Inverter>
The inverter 36 is provided above the battery box 41 of the battery unit 40, as shown in FIGS. More specifically, the inverter 40 is supported on a frame-shaped carrier 36 a fixed to the upper surface of the battery box 41 . The inverter 36 converts the DC power supplied from the battery unit 40 into AC power.

<Power delivery unit>
The power delivery unit 37 is provided on the right side of the battery unit 40, as shown in FIG. The power delivery unit 37 supplies DC power charged in the battery unit 40 to the inverter 36 . That is, the inverter 36 is supplied with DC power from the battery unit 40 via the power delivery unit 37 . The power delivery unit 37 is provided with various electric devices such as a contactor, a DC-DC converter, and an onboard charger.

<Electric motor>
The electric motor 39 is driven by AC power supplied from the inverter 36 . The electric motor 39 is provided on the left side of the battery unit 40, as shown in FIG. The electric motor 39 is provided such that its drive shaft extends in the front-rear direction.

<Hydraulic pump>
The hydraulic pump 51 is driven by the rotation of the drive shaft of the electric motor 39 to discharge hydraulic oil. The hydraulic pump 51 is provided in front of the electric motor 39 on the base plate 11 and near the front and rear positions of the lateral partition plate 12, as shown in FIG. The hydraulic pump 51 is arranged such that its rotating shaft extends in the front-rear direction. A rotary shaft of the hydraulic pump 51 is connected to a drive shaft of the electric motor 39 .

<Hydraulic valve>
The hydraulic valve 52 is provided on the base plate 11 on the left side of the front vertical partition plate 13 and on the front side of the horizontal partition plate 12, as shown in FIG. The hydraulic valve 52 is connected to the hydraulic pump 51 . The hydraulic valve 52 distributes hydraulic fluid discharged from the hydraulic pump 51 to hydraulic equipment such as various hydraulic cylinders.

<Operation pattern switching unit>
The operation pattern switching unit 53 is connected to the hydraulic valve 52 and changes the distribution destination of the hydraulic oil by the hydraulic valve 52 by changing the setting by the maintenance worker. As a result, the hydraulic cylinder that is moved by the driver's manipulation of various levers is changed. As a result, the operation pattern of various lever operations by the driver can be switched.
As shown in FIG. 2, the operation pattern switching unit 53 is arranged on the left side (outside in the width direction) of the hydraulic valve 52 in plan view.

<Swivel motor>
The swing motor 70 is a hydraulically driven motor rotationally driven by hydraulic oil supplied from the hydraulic valve 52 . The swing motor 70 is provided so as to pass through the base plate 11 at a position between the pair of front vertical partition plates 13 on the base plate 11 . The rotating motor 70 has the axis of the rotating shaft aligned in the vertical direction. By hydraulically driving the swing motor 70, the driving force of the swing motor 70 is transmitted to the swing circle 215 via a swing pinion (not shown). As a result, the upper rotating body 220 is driven to rotate with respect to the lower traveling body.

<Cooling unit>
As shown in FIG. 2, the cooling unit 61 is provided on the front side of the horizontal partition plate 12 and on the right side of the right front vertical partition plate. The cooling unit 61 has a rotationally driven cooling fan 62 and a heat exchange section 63 including a radiator and an oil cooler.

<Auxiliary Battery>
The auxiliary battery 64 is provided below the cooling unit 61 on the base plate 11, as shown in FIG. The auxiliary battery 64 supplies power to auxiliary equipment such as lights and various controllers. The auxiliary battery 64 is charged via the DC-DC converter of the power delivery unit 37 .
The oil tank 65 is arranged in front of the cooling unit 61, as shown in FIG. The oil tank 65 stores hydraulic oil to be supplied to the hydraulic motor.

<Protector>
As shown in FIG. 1, a pair of protectors 95 are provided at both rear and lower corners of the upper revolving body 220 at intervals in the width direction. The protector 95 is made of a high-strength member such as steel. The protectors 95 are integrally fixed to both corners of the rear end of the base plate 11 and extend upward. The protector 95 protects the upper revolving body 220 from an impact when the rear portion of the upper revolving body 220 collides during revolving.

<Exterior cover>
The exterior cover 100 is a cover that forms the outer shape of the upper revolving body 220, as shown in FIG. Various devices of the upper revolving body 220 are accommodated inside the exterior cover 100 . The exterior cover 100 has a left cover 120 , a right cover 130 and a rear cover 110 .
The left cover 120 forms the left portion of the exterior cover 100, as shown in FIGS. The left cover 120 covers the hydraulic pump 51, the hydraulic valve 52, and the operation pattern switching unit 53 from the left side, as shown in FIG.

The right cover 130 forms the right portion of the exterior cover 100, as shown in FIGS. The right cover 130 covers the cooling unit 61 , auxiliary battery 64 and oil tank 65 . The right cover 130 has an intake hole (not shown) for introducing air into the cooling unit 61 and an exhaust hole (not shown) for discharging the air that has passed through the cooling unit 61 .

<Rear cover>
As shown in FIGS. 1 and 2 , the rear cover 110 forms the rear portion of the exterior cover 100 . The rear cover 110 covers the battery unit 40, the inverter 36, the power delivery unit 37, and the electric motor 39, as shown in FIG.

The rear cover 110 has an opening/closing portion 111 as shown in FIG. The opening/closing portion 111 is a portion corresponding to the rear end and upper end of the rear cover 110 and is provided in the center in the width direction. The opening/closing portion 111 is provided at the upper end of the rear cover 110 so as to be rotatable about a rotation axis O along the width direction.

<Charging port>
The charging port 140 is provided at the rear portion of the upper surface of the battery box 41 of the battery unit 40, as shown in FIGS. More specifically, charging port 140 is supported on the rear end of carrier 36a, as shown in FIG. Charging port 140 is arranged at a position accessible from the outside by opening opening/closing portion 111 of rear cover 110 .
As shown in FIGS. 4 and 5, charging port 140 has base 150, normal charging coupler 160A as a first coupler, and quick charging coupler 160B as a second coupler.

<Base>
A base 150 is secured on the rear end of carrier 36a. The base portion 150 has a first plane 151A and a second plane 151B facing outward, which are the rear side of the upper rotating body. The first plane 151A and the second plane 151B are arranged side by side in the width direction of the upper revolving body 220 .
The first plane 151A and the second plane 151B are connected to each other so as to be concave toward the front side of the upper revolving body 220 . As a result, the first plane 151A and the second plane 151B are opposed to each other in the side-by-side direction.
Here, "the first plane 151A and the second plane 151B face each other" includes a state in which the first plane 151A and the second plane 151A face each other while being inclined.

<First plane>
The first plane 151A is provided on one side in the side-by-side arrangement direction (upper side in FIG. 4, one side in the vehicle width direction).
The first plane 151A extends rearward from the connection point between the first plane 151A and the second plane 151B toward the right side.

<Second plane>
The second plane 151B is provided on the other side in the side-by-side arrangement direction (the lower side in FIG. 4, the other side in the vehicle width direction).
The second plane 151B extends rearward toward the left side from the connection point between the first plane 151A and the second plane 151B.

The angle θ formed by the first plane 151A and the second plane 151B is set, for example, in the range of 130° to 170°, preferably in the range of 140° to 160°, more preferably in the range of 145° to 155°. In this embodiment, the angle θ between the first plane 151A and the second plane 151B is set to 150°.

<Normal charging coupler>
The normal charging coupler 160A is provided so as to protrude from the first plane 151A in the direction in which the first plane 151A faces. The normal charging coupler 160A has a cylindrical shape with a central axis extending in the projecting direction of the normal charging coupler 160A. The central axis of normal charging coupler 160A coincides with first axis L1 extending in the direction in which normal charging connector 170A is connected to normal charging coupler 160A. An end portion 161A, which is the tip of the normal charging coupler 160A in the protruding direction, faces the direction of the first axis L1. That is, the end 161A of the normal charging coupler 160A faces rearward and leftward.

<Rapid charging coupler>
The quick charge coupler 160B is provided so as to protrude from the second plane 151B in the direction in which the second plane 151B faces. Rapid charge coupler 160B has a cylindrical shape with a central axis extending in the projecting direction of rapid charge coupler 160B. The central axis of quick charge coupler 160B coincides with second axis L2 extending in the direction in which quick charge connector 170B is connected to quick charge coupler 160B. An end portion 161B, which is the tip in the projecting direction of the quick charge coupler 160B, faces the direction of the second axis L2. That is, the end 161B of the quick charge coupler 160B faces rearward and rightward.

The normal charge coupler 160A and the quick charge coupler 160B are arranged side by side in the same manner as the first plane 151A and the second plane 151B. The protruding end of normal charge coupler 160A and the protruding end of quick charge coupler 160B face each other in the side-by-side arrangement direction.
Here, in "the end of normal charge coupler 160A and the end of quick charge coupler 160B face each other", the end of normal charge coupler 160A in the projecting direction and the end of quick charge coupler 160B in the projecting direction are aligned. , including the state in which they face each other while being slanted.
The first axis L1 and the second axis L2 intersect each other at the intersection point P3 on the rear side of the upper rotating body 220 . The first axis L1 and the second axis L2 are included on imaginary planes orthogonal to both the first plane 151A and the second plane 151B, respectively.
The intersection P1 between the first axis L1 and the first plane 151A and the intersection P2 between the second axis L2 and the second plane 151B are arranged at the same height position.

The distance D between the intersection P1 between the first axis L1 and the first plane 151A and the intersection P2 between the second axis L2 and the second plane 151B (the interval between these intersections in the direction of arrangement) is, for example, in the range of 120 to 160 mm. It is preferably set in the range of 130-150 mm, more preferably in the range of 135-145 mm. In this embodiment, the distance D is set to 137 mm.
The length of normal charge coupler 160A in the first axis L1 direction and the length of quick charge coupler 160B in the second axis L2 direction may be the same or different.

A normal charge connector 170A connected to the normal charge coupler 160A and a quick charge connector 170B connected to the quick charge coupler 160B are connected to an external power supply. A vehicle charging system is configured by the normal charging connector 170A, the quick charging connector 170B, and the electric hydraulic excavator 200 .

The normal charging connector 170A has a normal charging gun 171A. The normal charging gun 171A is electrically connected at its rear end to an external power supply via a cable 172A. The normal charging gun 171A can be fitted to a normal charging coupler 160A having a cylindrical tip. When the normal charging gun 171A is engaged with the normal charging coupler 160A, the normal charging terminal (not shown) arranged inside the normal charging coupler 160A in the base 150 and the terminal at the tip of the normal charging gun 171A are electrically connected. Connected. As a result, power from the external power supply is supplied to the normal charging terminal of the charging port 140 via the cable 172A and the normal charging gun 171A. The power supplied to the normal charging terminal is supplied to the battery unit 40 via the normal charger and contactor of the power delivery unit 37 .

The quick charge connector 170B has a quick charge gun 171B. The quick charge gun 171B is electrically connected at its rear end to an external power supply via a cable 172B. The quick charge gun 171B can be fitted to a quick charge coupler 160B having a cylindrical tip. When the quick charge gun 171B is inserted into the quick charge coupler 160B, the quick charge terminal (not shown) arranged inside the quick charge coupler 160B in the base 150 and the terminal at the tip of the quick charge gun 171B are electrically connected. Connected. As a result, power from the external power supply is supplied to the quick charge terminal of the charging port 140 via the cable 172B and the quick charge gun 171B. Electric power from quick charge connector 170B is supplied to battery unit 40 via a contactor of power delivery unit 37 .

<Effect>
When charging the battery unit 40 in the electric hydraulic excavator 200 , the charging port 140 is exposed to the outside of the rear cover 110 by opening the opening/closing portion 111 of the rear cover 110 . In this state, the normal charging coupler 160A of the charging port 140 is connected to the normal charging connector 170A, or the rapid charging coupler 160B is connected to the quick charging connector 170B. Here, if the connection of the normal charge connector 170A to the normal charge coupler 160A and the connection of the quick charge connector 170B to the quick charge coupler 160B are performed at the same time, charging unintended by the operator may occur. may be lost. That is, for example, even if the operator assumes that charging will be performed faster and connects both the charging coupler 160A and the quick charging coupler 160B to the respective connectors at the same time, only the one that is connected first is actually connected. will be charged with priority. In this case, charging that is not intended by the operator is performed.

On the other hand, in the present embodiment, the connection of normal charge connector 170A to normal charge coupler 160A and the connection of quick charge connector 170B to quick charge coupler 160B cannot be performed at the same time.
That is, the end portion 161A of the normal charge coupler 160A and the end portion 161B of the quick charge coupler 160B face each other in the side-by-side direction. Therefore, if the quick charge connector 170B is connected to the quick charge coupler 160B while the normal charge connector 170A is connected to the normal charge coupler 160A, the normal charge gun 171A of the normal charge connector 170A and the quick charge gun 171B of the quick charge connector 170B will be connected. physically interfere with each other.

That is, the normal charge coupler 160A and the quick charge coupler 160B are arranged such that when one of them is connected to a charging connector, the other is prevented from being connected to the charging connector. Therefore, simultaneous connection of the normal charging connector 170A and the quick charging connector 170B can be avoided, so that unintentional charging by the operator can be prevented.

In particular, the normal charging gun 171A, when attached to the normal charging coupler 160A, has a shape whose longitudinal direction is the direction of the first axis L1, which is the projecting direction of the normal charging coupler 160A. In addition, the quick charge gun 171B has a shape whose longitudinal direction is the direction of the second axis L2, which is the projecting direction of the quick charge coupler 160B, when attached to the quick charge coupler 160B. Therefore, the first axis line L1 coinciding with the central axis line of the normal charge coupler 160A and the second axis line L2 coinciding with the central axis line of the quick charge coupler 160B intersect on the outside, so that the normal charge gun 171A and the quick charge gun 171A The gun 171B can be caused to interfere with each other more reliably.

In addition, in the present embodiment, simultaneous connection of the charging connectors to the normal charging coupler 160A and the quick charging coupler 160B is avoided only by the arrangement relationship, so there is no need to provide a separate movable part or the like. Therefore, since there is no need to consider wear of the movable portion, etc., it is possible to improve maintainability.

Furthermore, the orientations of the normal charge coupler 160A and the quick charge coupler 160B are defined by a first plane 151A and a second plane 151B connected at an angle to each other. Since the first plane 151A and the second plane 151B respectively face the rear side, the normal charge connector 170A or the quick charge connector 170B can be easily attached to the normal charge coupler 160A and the quick charge coupler 160B that similarly face the rear side. be able to. Further, when attaching the normal charging connector 170A or the quick charging connector 170B, there is no need for separate operations such as movement of the movable part, so that the complexity of the work can be avoided.

<Other embodiments>
Although the embodiment of the present invention has been described above, the present invention is not limited to this and can be modified as appropriate without departing from the technical idea of the invention.

For example, normal charge coupler 160A and quick charge coupler 160B may be arranged side by side in a direction other than the vehicle width direction, such as the vertical direction or the front-rear direction. Accordingly, the first plane 151A and the second plane 151B may also be arranged side by side in another direction.

Ordinary charge coupler 160A and quick charge coupler 160B may protrude in the vehicle width direction so as to be close to each other. In this case, normal charge coupler 160A and quick charge coupler 160B protrude from a pair of surfaces facing each other in the vehicle width direction. Also, the distance between the pair of surfaces is set to be at least greater than the longitudinal lengths of the normal charging gun 171A and the quick charging gun 171B. Also in this case, simultaneous connection of the normal charging gun 171A and the rapid charging gun 171B can be avoided as in the embodiment.

The normal charging coupler 160A and the quick charging coupler 160B are a pair of couplers to which a power cable connector is connected not only for charging the battery unit 40 but also for supplying power directly from an external power source to the inverter, for example. There may be. Also in this case, simultaneous connection of a plurality of power cables to a pair of couplers can be avoided. It may also be a pair of couplers for other uses.

Further, for example, a charging coupler capable of charging the battery unit 40 by connecting a charging connector as a connector is provided as a first coupler, and a power supply connector as a connector is connected as a second coupler. A power supply connector for supplying electric power to equipment in the electric hydraulic excavator 200 may be provided. The charging connector and the power supply connector are each connected to an external power supply via a cable.
In this case, when the charging connector is connected to the charging coupler, the charging connector prevents connection of the power supply connector to the power supply coupler. Further, when the power supply connector is connected to the power supply coupler, the power supply connector prevents connection of the charging connector to the charging coupler.

Although the electric hydraulic excavator 200 has been described as an example of the electric construction machine in the embodiment, the construction machine is not limited to this. For example, the present invention may be applied to an electric excavator in which the work machine 221 and the like are all electrically driven, and further to an electric hydraulic excavator to which electric power is supplied from the outside via a cable. Also, the present invention may be applied to other electric construction machines. Furthermore, the present invention may be applied to electric forklifts and electric loaders.

10 Revolving frame 11 Base plate 12 Horizontal partition plate 13 Front vertical partition plate 14 Front reinforcement plate 15 Bracket 16 Rear vertical partition plate 20 Portal frame 21 Column 22 Beam 36 Inverter 36a Carrier 37 Power delivery unit 39 Electric motor 40 Battery Unit 41 Battery box 42 Battery case 44 Sensor box 44a Service plug 51 Hydraulic pump 52 Hydraulic valve 53 Operation pattern switching unit 61 Cooling unit 62 Cooling fan 63 Heat exchange unit 64 Auxiliary battery 65 Oil tank 70 Swing motor 80 Operating space 81 Floor panel 84 Driver's seat 90 Canopy 95 Protector 100 Exterior cover 110 Rear cover 111 Opening/closing part 120 Left cover 130 Right cover 140 Charging port 150 Base part 151A First plane 151B Second plane 160A Normal charging coupler (first coupler)
160B quick charge coupler (second coupler)
161A end 161B end 170A normal charging connector (connector)
170B quick charge connector (connector)
171A Normal charging gun 171B Quick charging gun 172A Cable 172B Cable 200 Electric hydraulic excavator 210 Undercarriage 211 Track 212 Blade 215 Swing circle 220 Upper revolving body (body)
221 working machine 222 boom 223 arm 224 bucket O rotation axis L1 first axis L2 second axis

Claims (6)

a vehicle body;
a charging port accessible from the outside with respect to the vehicle body,
The charging port is
a first coupler and a second coupler arranged side by side so as to have an end portion facing the outside, a connector connected to an external power supply being connectable from the end portion side, respectively;
the end of the first coupler and the end of the second coupler face each other in the direction in which the first coupler and the second coupler are arranged side by side;
The charging port is
further comprising a base portion having a first plane and a second plane connected in the side-by-side direction so as to be concave toward the inside of the vehicle body;
The first plane is provided at a portion of the base on one side in the side-by-side arrangement direction and extends toward the rear side along the one side in the side-by-side arrangement direction,
The second plane is provided at a portion on the other side of the side-by-side arrangement direction of the base and extends toward the rear side toward the other side of the side-by-side arrangement direction,
the first coupler protrudes from the first plane such that a first axis extending in a direction in which the connector is connected to the first coupler is orthogonal to the first plane;
The work vehicle , wherein the second coupler protrudes from the second plane such that a second axis extending in a direction in which the connector is connected to the second coupler is orthogonal to the second plane . The work vehicle according to claim 1 , wherein the first axis and the second axis intersect outside the vehicle body. further comprising a battery unit provided in the vehicle body;
The first coupler is a normal charging coupler capable of normal charging of the battery unit by connecting a normal charging connector as the connector,
The work vehicle according to claim 1 or 2 , wherein the second coupler is a quick charge coupler capable of rapidly charging the battery unit by connecting a quick charge connector as the connector. A work vehicle according to claim 3 ;
the normal charging connector and the quick charging connector connected to the external power supply;
with
When the normal charging connector is connected to the normal charging coupler, the normal charging connector prevents connection of the rapid charging connector to the rapid charging coupler,
A vehicle charging system in which, when the quick charge connector is connected to the quick charge coupler, the quick charge connector prevents connection of the quick charge connector to the normal charge coupler. a battery unit provided in the vehicle body;
a device provided in the vehicle body;
further comprising
The first coupler is a charging coupler capable of charging the battery unit by connecting a charging connector as the connector,
The work vehicle according to claim 1 or 2 , wherein the second coupler is a power supply coupler that supplies power to the device by connecting a power supply connector as the connector. A work vehicle according to claim 5 ;
the charging connector and the power supply connector connected to the external power supply;
with
when the charging connector is connected to the charging coupler, the charging connector prevents connection of the power supply connector to the power supply coupler;
A vehicle charging system in which, when the power supply connector is connected to the power supply coupler, the power supply connector prevents connection of the charging connector to the charging coupler.

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