Portable type charging facility

Abstract

To provide a portable type charging facility having a relatively wide movable range.SOLUTION: A portable type charging facility includes: a frame which may be mechanically connected to a transport machine and may be moved by the transport machine when mechanically connected to the transport machine; and a charging device which is fixed to the frame and may charge a work machine. The charging device has: a charging circuit part; a first connection part which may be electrically connected to an external power source; and a second connection part which may be electrically connected to the work machine to be charged. The portable type charging facility is disclosed.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a portable charging station. [Background technology]

[0002] 2. Description of the Related Art A charging stand is known in which a charger main body is fixed and a movable connector storage section is provided that is movable relative to the charger main body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-166003 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the above-described conventional technology, the charger main body is fixed, and the movable range of the movable connector housing portion is limited.

[0005] Therefore, an object of the present disclosure is to provide a portable charging facility with a relatively wide range of movement. [Means for solving the problem]

[0006] In one aspect, a platform that is mechanically connectable to a transport machine and that is movable by the transport machine when mechanically connected to the transport machine; a charging device fixed to the frame and capable of charging the work machine, The charging device is provided as a portable charging facility having a charging circuit unit, a first connection unit electrically connectable to an external power source, and a second connection unit electrically connectable to the work machine to be charged. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide a portable charging facility with a relatively wide range of movement. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a perspective view schematically illustrating the entire portable charging equipment according to the present embodiment. [Figure 2] FIG. 2 is a schematic diagram illustrating the configuration of a charging circuit section of the charging device. [Figure 3] FIG. 2 is a perspective view schematically illustrating a fixed state of the portable charging equipment. [Figure 4] FIG. 2 is a schematic diagram of a control system of the portable charging equipment. [Figure 5] FIG. 1 is a diagram illustrating, from above, an example of a construction site where the portable charging equipment of the present embodiment is suitable for use. [Figure 6] FIG. 10 is an explanatory diagram of another example of a method for fixing the portable charging equipment to the ground. [Figure 7] Two-sided view of external anchor hardware. [Figure 8] FIG. 10 is an explanatory diagram of yet another example of a method for fixing the portable charging equipment to the ground. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment will be described in detail below with reference to the accompanying drawings. Note that the dimensional ratios in the drawings are merely examples and are not limiting. Furthermore, shapes and the like in the drawings may be partially exaggerated for the sake of explanation. Furthermore, in the drawings, for ease of viewing, reference symbols may be assigned only to some of the parts that exist with the same attribute.

[0010] Fig. 1 is a perspective view that schematically shows the entire portable charging equipment 1 according to this embodiment. Fig. 2 is a schematic diagram of the configuration of a charging circuit unit 22 of a charging device 20. Fig. 3 is a perspective view that schematically shows the fixed state of the portable charging equipment 1. In Fig. 3, the symbol G indicates the ground.

[0011] The portable charging equipment 1 is portable (movable) and can charge the work machine to be charged. The work machine to be charged can be any type, but is typically a work machine whose power source is an electric motor. The type of work machine may be a backhoe, breaker, crusher, grabber, dump truck, various cranes, etc.

[0012] The portable charging equipment 1 is typically installed in a manner that it is supported on the ground G (see FIG. 3), but may also be used inside a building or the like.

[0013] The portable charging equipment 1 includes a stand 10 and a charging device 20.

[0014] The base 10 securely supports the charging device 20. The charging device 20 may be secured by any method, such as bolting or welding. The base 10 has sufficient strength and rigidity to support the weight of the charging device 20. The base 10 may be in the form of a metal plate or may have a metal frame with a lattice structure.

[0015] In this embodiment, the gantry 10 has a substantially rectangular outer shape when viewed from above, but the outer shape is arbitrary.

[0016] The platform 10 can be mechanically connected to a transport machine, and when connected to the transport machine, can be moved by the transport machine.

[0017] In this embodiment, the gantry 10 is provided with a crane hoisting device 30. The crane hoisting device 30 may be an eyebolt or the like. The crane hoisting device 30 may be provided at each of the four corners of the gantry 10 (the four corners when viewed from above), for example.

[0018] In this case, the platform 10 can be mechanically connected to a crane as a transport machine, and can be moved by the crane when mechanically connected to the crane. Specifically, the hoisting device 30 can be hung on a crane hook, and the portable charging equipment 1 can be suspended and moved by the crane. In this case, in the case of a fixed crane, the range of movement of the portable charging equipment 1 is determined by the length of the crane's jib or boom, etc. Note that any type of crane can function as a transport machine, and may be mobile or fixed.

[0019] In this embodiment, the locations of the crane hoisting devices 30 are arbitrary, but preferably, they may be set so that the centroid of the shape connecting the respective locations in top view approximately coincides with the center of gravity of the portable charging equipment 1. In this case, the posture of the portable charging equipment 1 can be stabilized when transported by the crane.

[0020] In this embodiment, the pedestal 10 has grooves 32 into which the forks of a forklift can be inserted. Two grooves 32 are provided in a pair, in parallel. The grooves 32 are provided in the form of downward recesses on the underside of the pedestal 10. Instead of the grooves 32, holes (insertion holes) with closed bottoms may be used.

[0021] In this case, the platform 10 can be mechanically connected to a forklift as a transport machine, and can be moved by the forklift when mechanically connected to the forklift. Specifically, the two forks of the forklift can be passed through the grooves 32, and the portable charging equipment 1 can be lifted and moved by the forklift. In this case, the range of movement of the portable charging equipment 1 is determined according to the range of movement of the forklift.

[0022] In this embodiment, the two grooves 32 may be provided at any positions, but preferably, the centers thereof may be set so as to substantially coincide with the center of gravity of the portable charging equipment 1. In this case, the posture of the portable charging equipment 1 can be stabilized when it is transported by a forklift.

[0023] The pedestal 10 may have wheels 18 that can be supported on the ground. When the portable charging equipment 1 is placed on a horizontal surface, the wheels 18 can rotate around a horizontal axis. The wheels 18 may be supported on the pedestal 10 in a steerable manner. That is, the rotation axis of the wheels 18 may be supported so as to be rotatable around a vertical axis relative to the pedestal 10. Alternatively, the wheels 18 may be provided in a non-steerable manner, for example, for straight travel. Furthermore, the wheels 18 may be supported on the pedestal 10 via springs and / or dampers.

[0024] When the pedestal 10 has such wheels 18, it becomes possible for the pedestal 10 to move by itself. For example, after moving the pedestal 10 by a crane, the wheels 18 can be used to move the pedestal 10 to a desired position. In this case, the portable charging equipment 1 may be moved by a towing vehicle by attaching a hook from the towing vehicle to the hoisting device 30 for the crane. In a modified example, the wheels 18 may be electrically driven. That is, the wheels 18 may be drive wheels. In this case, automatic control of acceleration / deceleration, stopping, steering, etc. may be realized in response to instructions from a user.

[0025] The wheels 18 may be retractable (see arrow R10 in FIG. 1). That is, the wheels 18 may be changeable between a traveling (self-propelled) state in which they protrude downward from the bottom surface of the gantry 10 and a retracted state in which they are positioned above the bottom surface of the gantry 10. In the retracted state, the gantry 10 is directly supported on the ground using the entire bottom surface, thereby improving positional stability when installed.

[0026] The mount 10 has a through-hole 14 through which a fastener 90 passes, one end of which is fixed to the ground. The fastener 90 may be, for example, an anchor bolt or the like. In this case, when the mount 10 attempts to move relative to the ground, the fastener 90 hits the side wall of the through-hole 14, thereby restricting further movement of the mount 10. In this way, the mount 10 can easily prevent unintended movement at the installed position by utilizing the fastener 90.

[0027] The stand 10 may also be provided with various output ports 19 for charging tools, etc. In this case, it becomes possible to charge tools other than the work machine.

[0028] As described above, the charging device 20 is fixed to the top of the stand 10. The charging device 20 has a charging circuit section 22 (see FIG. 2), a first connection section 24 that can be electrically connected to an external power source, and a second connection section 26 that can be electrically connected to the work machine to be charged. Note that existing commercially available products may be used to form part or all of the charging device 20.

[0029] 2, the charging circuit unit 22 includes a converter 220, an inverter 222, a step-up transformer 224, and a rectifier 226.

[0030] Converter 220 receives a three-phase AC voltage (e.g., 200 V) from first connection 24 as an input and generates a DC voltage (e.g., 350 V). Inverter 222 receives the DC voltage from converter 220 as an input and generates a high-frequency AC voltage. Step-up transformer 224 steps up the high-frequency AC voltage. Note that step-up transformer 224 may be an insulating transformer. Rectifier 226 rectifies and smoothes the stepped-up AC waveform and outputs it to second connection 26. The first connection unit 24 may be provided on a main body (case) of the charging device 20. The first connection unit 24 may include a power supply cable (not shown). In this case, one end of the power supply cable is electrically connected to the charging circuit unit 22, and the other end is electrically connectable to an external power supply. For example, the other end of the power supply cable may be in the form of a socket. Alternatively, the power supply cable may be separate from the first connection unit 24. In this case, one end of the power supply cable is electrically connectable to the first connection unit 24, and the other end is electrically connectable to an external power supply.

[0031] Second connection unit 26 may be provided on the main body (case) of charging device 20. Second connection unit 26 may include a charging cable (not shown). In this case, one end of the charging cable is electrically connected to rectifier 226, and the other end is electrically connectable to the work machine to be charged. Alternatively, the charging cable may be separate from second connection unit 26. In this case, one end of the charging cable is electrically connectable to second connection unit 26, and the other end is electrically connectable to the work machine to be charged. In either case, the other end of the charging cable (the end connected to the work machine to be charged) may be in the form of a charging connector. The charging connector may conform to a corresponding standard (for example, CHAdeMO). Multiple types of charging cables and / or charging connectors may be provided depending on the type of standard.

[0032] 2 is merely an example and is not limited to this. For example, converter 220, inverter 222, and rectifier 226 may be omitted. In this case, a charging cable may be electrically connectable to the secondary side of step-up transformer 224.

[0033] FIG. 4 is a schematic diagram of the control system of the portable charging equipment 1. As shown in FIG.

[0034] As shown in Fig. 4, the portable charging equipment 1 includes a processing device 50. The processing device 50 includes a central processing unit (CPU) and a storage device, and performs various arithmetic processing. The storage device may include a main storage device such as a random access memory (RAM) or a read only memory (ROM), and an auxiliary storage device such as a hard disk drive (HDD) or a solid state drive (SSD).

[0035] The above-described charging circuit section 22 is connected to the processing device 50. The processing device 50 controls the charging circuit section 22, thereby controlling the charging operation for the work machine to be charged.

[0036] An input / output device 51 is connected to the processing device 50. The input / output device 51 may include, as input devices, a keyboard, various switches, buttons, a remote controller, a microphone, etc. The input / output device 51 may also include, as output devices, a speaker or a display. A user can input various instructions (such as an instruction to start or stop charging) to the processing device 50 via the input / output device 51. The user may also be able to grasp, via the output device, the status of the charging device 20 (for example, whether charging is in progress) and the status of the work machine to be charged (for example, the percentage of charge).

[0037] A position measuring device 52 is connected to the processing device 50. The position measuring device 52 includes, for example, an antenna for receiving satellite signals, and performs positioning of the antenna position (i.e., the position of the portable charging facility 1) based on satellite signals from a plurality of satellites. The plurality of satellites may be satellites related to the GNSS (Global Navigation Satellite System).

[0038] A communication device 54 is connected to the processing device 50. The communication device 54 transmits various information such as the positioning results of the position measuring device 52 and the state of the charging circuit unit 22 to an external device (for example, a user terminal or a server). The communication device 54 may also receive various instructions and data from an external device.

[0039] 4 is merely an example, and some components may be omitted or other components may be added. For example, the position measuring device 52 and the communication device 54 may be omitted. Also, some of the processing of the processing device 50 may be implemented by an external server.

[0040] Next, an example of a suitable usage environment for the portable charging equipment 1 of this embodiment will be described with reference to FIG.

[0041] FIG. 5 is a diagram showing a schematic top view of an example of a construction site where the portable charging equipment 1 of this embodiment is suitable for use.

[0042] 5, a crane 100 is placed and an electric work machine 150 is working. The work machine 150 is assumed to be working to load earth and sand (or waste materials) onto a dump truck 152 (excavation and loading work).

[0043] At the construction site, two distribution boards 160 are installed as external power sources. Preferably, there are two or more distribution boards 160 in different locations. The distribution boards 160 may be dedicated to the portable charging equipment 1 or may be shared with other power supply targets.

[0044] It should be noted that the crane 100 is a crane for construction work, and does not have to be used only (dedicated) for transporting the portable charging equipment 1. The number of cranes 100 may be two or more.

[0045] Here, it is assumed that the portable charging equipment 1 is moved from position P0 (shown by a dotted line) to position P1 (shown by a solid line) in accordance with the position of the work machine 150. In Fig. 5, the range inside the circular dotted line C500 roughly corresponds to the range over which the portable charging equipment 1 can be moved by the crane 100.

[0046] In this case, as described above, the user (on-site worker) can hang the hook of the crane 100 on the crane hoisting device 30, hoist the portable charging equipment 1 using the crane 100, and move the portable charging equipment 1 from position P0 to position P1. Note that, during movement, position information of the portable charging equipment 1 (measurement results by the position measuring device 52) may be notified to the operator of the crane 100. At this time, the position information may be superimposed on an image display that shows the site situation from the line of sight of the crane operator. In this case, the crane operator can easily lower the portable charging equipment 1 to position P1 while visually checking and monitoring the position information. Note that, in a modified example, some or all of the operations of the crane 100 may be achieved automatically.

[0047] When the portable charging equipment 1 moves to position P1, the user releases the hook of the crane 100 from the crane hoisting device 30. At this time, a fixing device 90 that passes through the through-hole 14 may be installed to substantially disable the movement of the portable charging equipment 1. Alternatively, when the portable charging equipment 1 is lowered from the crane 100, the portable charging equipment 1 may be lowered so that the existing fixing device 90 passes through the through-hole 14. Next, the user electrically connects the distribution board 160 near position P1 and the portable charging equipment 1 with the power supply cable 161, and then the preparations are complete.

[0048] When the state of charge of the work machine 150 decreases, the operator of the work machine 150 moves the work machine 150 close to the portable charging equipment 1 (within the reach of the charging cable) in order to charge it. Then, by electrically connecting the portable charging equipment 1 to the work machine 150, a state in which charging can begin can be created.

[0049] However, work machines are equipped with batteries with relatively large capacities, and tend to take a long time to charge from 0% to 100% (for example, to a fully charged state). Also, work machines tend to travel at relatively slow speeds or be fixed, and with fixed charging facilities, travel times also tend to be long.

[0050] In this regard, according to this embodiment, as shown in Fig. 5, the portable charging equipment 1 can be moved, so the travel distance (and accompanying travel time) of the work machine 150 until it moves close to the portable charging equipment 1 can be reduced. In other words, the travel distance L51 from the portable charging equipment 1 at position P1 can be made significantly shorter than the travel distance L52 from the portable charging equipment 1 at position P0. This difference becomes even more pronounced when the number of charging operations becomes relatively large.

[0051] In this way, according to this embodiment, the portable charging equipment 1 can be used while being moved according to the position (work position) of the work machine 150. As a result, it is possible to reduce the number of charging equipment required at one construction site. Such a portable charging equipment 1 is suitable for cases where there are many work machines such as the work machine 150. In other words, the availability of the portable charging equipment 1 makes it possible to increase the number of work machines such as the work machine 150 and their operating rate.

[0052] Furthermore, the ground at a construction site is generally not smooth, and it may be difficult or impossible to travel there using normal wheels (for example, the wheels 18 of the portable charging equipment 1).

[0053] In this regard, according to this embodiment, the portable charging equipment 1 can be lifted and transported by the crane 100, so it is easy to expand the range of movement of the portable charging equipment 1 even at construction sites with many uneven grounds.

[0054] Although each embodiment has been described in detail above, it is not limited to the specific embodiment, and various modifications and changes are possible within the scope of the claims. It is also possible to combine all or a plurality of components of the above-described embodiments.

[0055] For example, in the above-described embodiment, the method of fixing the portable charging equipment 1 to the ground can be any method that prevents the portable charging equipment 1 from tipping over, and is not limited to the above-described method of installing the fixing device 90 that passes through the through-hole 14. For example, as shown in FIG. 6 , external anchor metal fittings 17 as shown in the two-sided view in FIG. 7 may be fixed to appropriate positions, such as the four corners of the base 10. In this case, the holes 171 of the anchor metal fittings 17 can be used in the same way as the through-holes 14 to fix the portable charging equipment 1 to the ground with the fixing device 90. Alternatively, as shown in FIG. 8 , the portable charging equipment 1 may be fixed to the ground using a weight 17W. In this case, the weight 17W may be attached to the base 10 using a hanging device 30, as shown in FIG. 8 , or may be attached to the base 10 using the through-hole 14. [Explanation of symbols]

[0056] 10 Mounting stand 14 through holes 18 wheels 19 output ports 20 Charging device 22 Charging circuit section 24 First connection part 26 Second connection part 30 Lifting equipment 32 Groove 50 Processing equipment 51 Input / Output Devices 52 Position measuring device 54 Communication equipment 90 Fixtures 100 Crane 150 Work Machinery 152 Dump Truck 160 Distribution board 220 Converter 222 Inverter 224 Step-up transformer 226 Rectifier

Claims

1. a platform that is mechanically connectable to a transport machine and that is movable by the transport machine when mechanically connected to the transport machine; a charging device fixed to the frame and capable of charging the work machine, The charging device is a portable charging facility having a charging circuit unit, a first connection unit electrically connectable to an external power source, and a second connection unit electrically connectable to the work machine to be charged.

2. the transport machine includes a crane; The portable charging facility according to claim 1 , wherein the platform has a lifting tool to which a hook of the crane can be connected.

3. the transport machine includes a forklift; The portable charging facility according to claim 1 , wherein the platform has grooves or holes into which forks of the forklift can be inserted.

4. The portable charging facility according to claim 1 , wherein the base has a through-hole through which a fixture, one end of which is fixed to the ground, passes.

5. the platform has wheels that can be supported on the ground; 5. The portable charging equipment according to claim 1, wherein the wheels are changeable between a drivable state in which the wheels protrude downward from the underside of the base and a retracted state in which the wheels are positioned above the underside of the base.

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