JP4748975B2 - Electric work vehicle - Google Patents

Description

  The present invention relates to an electric work vehicle including an equipment storage chamber in which a motor for driving the front wheel is stored above the front wheel.

  2. Description of the Related Art Conventionally, as an electric work vehicle, for example, as described in Patent Document 1 to be described later, a front wheel is provided below a device storage chamber provided at a front portion of a vehicle body, and a lower portion of a loading platform provided at a rear portion of the vehicle body. There is an electric yard transport vehicle equipped with a rear wheel, and it is used for transporting luggage in markets and factories. In this type of vehicle, the front wheel serves as both a driving wheel and a steering wheel, and the vehicle is driven by being driven by a motor (electric mechanism) housed in the equipment storage chamber, and is provided in the equipment storage room. Steering is performed by turning the front wheels by the steering wheel. A battery is mounted on the vehicle body in order to supply power to the motor.

By the way, it is not restricted to the thing of the above forms, The charge of the battery in a battery mounting vehicle is performed by connecting the electric wire for charging (charge cord) to the external power supply of the charging equipment provided in the building etc., for example. However, the handling of the electric wire used in this case becomes a problem. In other words, it is not economical to prepare electric wires for each charging facility, and if they are simply placed on the vehicle, the electric wires may interfere with operation and work, or the wires may be lost or stolen. It is possible. Therefore, as described in Patent Document 2 and Patent Document 3, a technique for storing an electric wire in a vehicle has been developed.
Also, when charging a battery by connecting a charging wire to an external power source, the vehicle may be damaged if the vehicle travels as it is after charging is complete. It may be tangled with surrounding objects or wheels. Therefore, as described in Patent Document 4, when the electric wire is not completely wound on the drum, or when the opening of the box that stores the electric wire is not closed by the shutter, the vehicle travels. Prohibited technologies have been developed.

Japanese Utility Model Publication No. 53-39929 JP-A-11-199189 JP 2003-73099 A JP 2003-219511 A

Even in a vehicle as described in Patent Document 1, it is desirable to place a charging device including a charging wire on the vehicle itself in order to efficiently perform a battery charging operation. It is desirable to prevent the electric wires from interfering with other work.
Accordingly, an object of the present invention is to allow a charging device to be suitably mounted in an electric work vehicle including an equipment storage chamber above a front wheel.

  In order to achieve the above object, the present invention provides a device storage chamber in which a front wheel is provided at a front portion of a vehicle body so as to be able to turn around a vertical axis, and a motor for driving the front wheel is stored above the front wheel. An electric work vehicle in which a battery is mounted on the vehicle body at a position rearward of the device storage chamber, and a turntable provided so as to be capable of turning with respect to the vehicle body in the device storage chamber and turning integrally with the front wheel. The motor, a control device for controlling the motor, and a charging device for charging the battery are supported, and one end side is connected to the charging device and the other end side is connected to an external power source. An electric wire, a second electric wire for connecting the battery and the charging device, and a storage device for storing the first electric wire in the device storage chamber are provided, and the first electric wire is stored in the storage device. Above by device A drawer part that is stored in the container storage room and that can be pulled out of the equipment storage room, and an internal wiring part that is continuous with the part and cannot be pulled out and led to the charging device in the equipment storage room. It has a characteristic configuration.

  According to this, electric power is supplied from the external power source to the charging device via the first electric wire by pulling out the portion of the first electric wire included in the electric work vehicle to the outside of the equipment storage room and connecting it to the external power source. Since it adjusts to a battery in a charging device and is supplied to a battery via a 2nd electric wire, a battery can be charged. Therefore, the battery can be charged only by moving the electric work vehicle to a place where there is an external power supply, and it does not take time and labor for the worker to go to the charging wire or charging device each time the charging work is performed. There is no need to prepare a charging device for each charging facility. In addition, after the battery is charged, the lead-out portion of the first electric wire can be stored in the equipment storage chamber by the storage device, so that the lead-out portion does not interfere with other work or operation of the electric work vehicle. For example, if the drawer portion is stored at a position more outward than the swivel base or the device on the swivel base, the stored drawer portion does not prevent the swivel base or the device from turning.

  In the present invention, the motor is installed at substantially the center of the swivel base, and the charging device is disposed on the swivel base at a position outside the motor and the transformer. A charge controller that is supported via a shaft and disposed above the motor, and is electrically connected to the transformer, and the first electric wire has an end on the inner wiring portion side. The second electric wire is connected to the charging controller, and one end side of the second electric wire is connected to the transformer, and the other end side is connected to the battery.

  If it does in this way, the electric power from an external power supply will be supplied to a charge controller via a 1st electric wire, and will be supplied to a transformer via the electric wire which connects both from a charge controller. Further, after the voltage is adjusted in the transformer, the battery can be charged by being supplied from the transformer to the battery via the second electric wire. In addition, since the transformer is located outside the motor and the charge controller is located above the motor, the transformer and charge controller can be installed and inspected while the motor is installed. The battery and the charging controller can be connected by electric wires without being obstructed by the motor, and wiring work can be easily performed.

  In the present invention, the device storage chamber includes a column that is erected on the vehicle body, and a cover that is detachably attached to the column and forms a jacket of the device storage chamber. And an opening through which the first electric wire can be taken in and out is formed inside and outside the equipment storage chamber, and the storage device is provided so as to be slidable in a direction toward and away from the opening along the cover. And a rotating body that is rotatably provided on the sliding body and on which the first electric wire is wound. The first electric wire is led into the device housing chamber through the opening, and It can be configured to be wound around a rotating body, folded back to a position closer to the opening than the rotating body, and then guided to the charging device.

  In this way, the sliding body can be slid in the direction away from the opening, and the lead-out portion of the first electric wire can be guided and stored in the equipment storage chamber through the opening of the cover. Further, by pulling the drawing portion of the first electric wire and sliding the sliding body in the direction approaching the opening, the drawing portion stored in the device storage chamber can be pulled out of the device storage chamber. Here, since the first electric wire is wound around the rotating body, the first electric wire can be smoothly stored and pulled out. Moreover, since the cover can be removed from the support column, the cover can be removed as necessary, and the maintenance work and wiring work of the charging device and the storage device can be easily performed.

  Furthermore, in the present invention, a partition member that isolates the lead-out portion of the first electric wire stored by the storage device from the inside in the equipment storage chamber is provided over at least a slidable range of the sliding body. The internal wiring portion of the first electric wire is configured to be hung down to a position lower than the swivel at an outer position than the swivel and then led to the charging device. it can.

  In this way, the partition member can prevent the lead-out portion of the first wire stored in the equipment storage chamber from coming into contact with the swivel base, the charging device supported by the swivel base, the control device, or the like. In addition, it is possible to protect internal devices from dust and water droplets that have adhered to the surface of the drawer portion and have entered the device storage chamber. Furthermore, since the internal wiring portion of the first electric wire is suspended from the swivel base to a position lower than the swivel base, water droplets or the like adhering to the surface of the lead-out portion are internally routed. Even if it is transmitted to, it is dropped at the suspended position, so there is no risk of adhering to the swivel or the equipment on the swivel, and there is no risk of reaching the charging device.

  In the present invention, the storage device may include a holding device that holds the sliding body at a position farthest from the opening. If it does in this way, the state which stored all the drawer | drawing-out parts of the 1st electric wire can be reliably hold | maintained by hold | maintaining the sliding body in the position most distant from the opening part with the holding | maintenance apparatus. For this reason, it is possible to prevent the sliding body from moving unnecessarily due to vibrations during traveling and the like, and the drawer portion coming out of the device storage chamber from the opening.

  Further, in the present invention, a detection device that detects that the sliding body is at a position farthest from the opening is provided, and the control device does not detect that the sliding body is in the position by the detection device. In some cases, the driving of the motor is prohibited. In this way, the motor can be driven, that is, the electric work vehicle can be driven only in a state in which all of the lead-out portions of the first electric wires are stored. Can be prevented.

  According to the present invention, the battery mounted on the vehicle body can be charged by pulling out the lead-out portion of the first electric wire provided in the electric work vehicle to the outside of the equipment storage chamber and connecting it to the external power source. Therefore, the battery can be charged as long as the electric work vehicle is moved to a place where there is an external power source, and the operator does not have to go to the electric wire for charging and the charging device to prepare. Further, the retracting device can store the lead-out portion of the first electric wire in the equipment storage chamber so as not to interfere with other work and the operation of the electric work vehicle.

  Hereinafter, an embodiment in which the present invention is applied to an electric yard carrier vehicle which is a kind of electric work vehicle will be described with reference to the drawings.

  As shown in FIG. 1, the electric premises transport vehicle of this embodiment is provided with a front frame 2 at a front portion of a vehicle body 1 extending in the front-rear direction, and an equipment storage chamber 3 above the front frame 2. As shown in FIGS. 2 and 3, the front frame 2 includes a floor 2A laid at the front of the vehicle body 1 and a cylindrical housing 2B erected at the center in the left-right direction of the floor 2A. The chamber 3 includes a side cover 4 that covers various devices accommodated therein from the side, and a top cover 5 that covers the device from above. The side cover 4 has a front, left rear, and right rear three, and has a cylindrical shape. The left rear side cover 4 is provided with an opening 4a for taking in and out an electric wire 30 described later. The equipment storage chamber 3 is provided with a steering handle 6 for steering, an accelerator lever 7 for adjusting the traveling speed, and the like.

  As shown in FIG. 1 and FIG. 3, a front wheel 8 is provided below the device storage chamber 3 so that the upper portion is stored in the housing 2 </ b> B of the front frame 2. The front wheel 8 serves as both a steering wheel and a traveling drive wheel. Steering is performed by turning about the vertical axis according to the operation of the steering handle 6, and rotating about the horizontal axis according to the operation of the accelerator lever 7. It is run by this. Further, as shown in FIG. 1, a driver's cab 9 on which the driver gets on is provided on the vehicle body 1 at a position behind the front frame 2, and a luggage is placed at a position behind the driver's cab 9. A loading platform 10 is provided. The cab 9 and the loading platform 10 are partitioned by a backrest 11 in the front-rear direction. A battery 12 is provided at a position below the loading platform 10 of the vehicle body 1, and left and right rear wheels 13 are provided at the rear end portion of the vehicle body 1.

  As shown in FIG. 2, the device storage chamber 3 includes a column 14 to which the side cover 4 is attached. The support column 14 is provided with pillars 14A provided upright at the left front portion, right front portion, and rear portion of the housing 2B, a support 14B that connects the upper portions of the left front and right front pillars 14A, and a support that connects the lower portions. 14C, and upper portions of the left front and rear pillars 14A, and a support 14D for connecting the upper portions of the right front and rear pillars 14A to each other. The front side cover 4 is attached to the left front and right pillars 14A, the left rear side cover 4 is attached to the left front and rear pillars 14A, and the right rear side cover 4 is attached to the right front and rear pillars 14A. It is attached over. Each side cover 4 is fixed to each pillar 14A with a screw, and can be detached from the column 14 by removing the screw.

  As shown in FIG. 3, the steering handle 6 includes an annular wheel 6A that is disposed above the top cover 5 and gripped by the driver, and is connected to the wheel 6A via a spoke 6B. A base 6C provided to be covered with the cover 5 is provided. A shaft 6D extends downward from the base 6C, and a bracket 6E provided at the lower end of the shaft 6D is fixed to a swivel base 17 described later. In the state where the bracket 6E is fixed to the swivel base 17, the base 6C is positioned above a motor 18 which will be described later, and the base 6C and the motor 18 are vertically separated.

  As shown in FIG. 3, a drive support 15 is installed at the upper end of the housing 2B, and a drive device 16 is supported on the drive support 15 via a bearing so as to be rotatable about a vertical axis. A front wheel 8 is supported by the drive device 16 so as to be rotatable about a horizontal axis, and a swivel base 17 is installed at an upper end portion of the drive device 16. The above-described steering handle 6 is fixed to the swivel base 17, and the steering handle 6, the swivel base 17, the drive device 16, and the front wheel 8 are integrated when the driver operates the steering handle 6. To turn and steer.

  As shown in FIGS. 2 and 3, a motor 18 is installed vertically in the center of the swivel base 17, that is, the rotation shaft is oriented in the vertical direction, and the torque generated from the motor 18 causes the drive device 16 to move. To the front wheel 8 and the front wheel 8 is driven. The swivel base 17 supports a control unit 20 via a bracket 19 as a control device for controlling the motor 18, and a transformer 21 including a rectifier as a transformer of the charging device according to the present invention. Yes. Both the control unit 20 and the transformer 21 are supported on the swivel base 17 at a position outward from the motor 18, and as shown in FIG. 2, the control unit 20 turns with the front wheels 8 facing straight ahead. The transformer 21 is arranged at a position on the front left side of the platform 17, and the transformer 21 is arranged at a position on the right front side of the turntable 17.

  Further, as shown in FIGS. 3 and 4, with the front wheel 8 directed in the straight traveling direction, the base 6C is positioned at the right rearward position via a bracket 22 as a charge controller of the charging device according to the present invention. The charge controller 23, the contactor 24, and the fuse 25 are supported. The charge controller 23 and the contactor 24, and the contactor 24 and the fuse 25 are respectively connected by electric wires. When an operation button provided in the charge controller 23 is operated, the charge controller 23 connects the contactor 24 according to a preset program. Control.

  As shown in FIG. 5, a slide bar 26 is provided on the upper edge of the left rear side cover 4 so as to be slidable in the circumferential direction along the side cover 4. The slide bar 26 includes an operation unit 26a positioned outside the side cover 4 and a support unit 26b positioned inside, and a roller 27 is rotatably provided on the support unit 26b. Two rollers 27 are arranged apart from each other in the vertical direction. As shown in FIG. 2, both rollers 27 are provided with the axial direction toward the center of the device storage chamber 3.

Further, as shown in FIG. 5, the left rear side cover 4 is provided with a guard 28 and an inner cover 29. As shown in FIG. 2, the guard 28 is located outside the housing 2 with respect to the housing 2B and the swivel base 17, and is provided between the left front and rear pillars 14A. The guard 28 includes an inner wall portion 28a that is provided inwardly spaced from the inner surface of the side cover 4, a side wall portion 28b that extends from both circumferential ends of the inner wall portion 28a toward the side cover 4, an inner wall portion 28a, The bottom part 28c is connected to the lower end of the side wall part 28b, and the opening part 4a of the side cover 4 is located between the side wall parts 28b. A through hole 28d is formed at a position below the inner cover 29 on the bottom 28c. The inner cover 29 is provided so as to surround the opening 4 a of the side cover 4 from the inside of the device storage chamber 3, and a through hole 29 a is formed in the left side wall portion of the inner cover 29.
A slide bar 26 is provided between the left side wall 28 b of the guard 28 and the left side wall of the inner cover 29. That is, when the slide bar 26 is slid in the direction approaching the opening 4a (right direction), the slide bar 26 is stopped by coming into contact with the left side wall portion of the inner cover 29 and sliding away from the opening 4a (left direction). When it is moved, it abuts against the left side wall 28b of the guard 28 and stops. By sliding the slide bar 26 in the direction away from the opening 4a (left direction), the electric wire 30 connected to the external power source is drawn into the space between the side cover 4 and the guard 28 when the battery 12 is charged. As shown in FIG. 5, when the slide bar 26 is slid and brought into contact with the left side wall 28b of the guard 28 (when it is farthest from the opening 4a), the electric wire is placed in the inner cover 29. The outlet 30A provided at the end of 30 is stored.

As shown in FIG. 5, the electric wire 30 is led into the equipment storage chamber 3 through the through hole 29 a of the inner cover 29 from the opening 4 a provided on the left rear side cover 4 near the cab 9. Can be put. The electric wire 30 is guided toward the slide bar 26 along the side cover 4 and the guard 28, wound around both rollers 27 in the vertical direction, and folded back toward the opening 4 a and the inner cover 29. After being led to the lower position of the inner cover 29 along the side cover 4 and the guard 28, the electric wire 30 is suspended downward through the through hole 28 d of the guard 28. And as shown in FIG. 6, the electric wire 30 is guide | induced to the front along the outer periphery of the housing 2B from the downward position of the guard 28, is started up along the support | pillar 14 in the front part of the apparatus storage chamber 3, Guided toward the center of the storage chamber 3. Here, the electric wire 30 is passed between the motor 18 and the base 6 </ b> C, passes through the center of the device storage chamber 3, is led to the rear portion, and is then started up and connected to the contactor 24 and the fuse 25.
The electric wire 30 corresponds to the first electric wire according to the present invention, and when the slide bar 26 is slid toward the opening 4a of the electric wire 30 and is brought into contact with the left side wall portion of the inner cover 29 ( When it is closest to the opening 4a), the portion outside the device storage chamber 3 is the drawer portion in the present invention, and the portion in the device storage chamber 3 is the internal routing portion in the present invention. Further, the electric wire 30 is appropriately fixed to the housing 2 </ b> B and the support column 14 in a wiring portion from passing through the through hole 28 d of the guard 28 to being raised at the front portion of the device storage chamber 3.

As shown in FIG. 6, the electric wire 31 connecting the battery 12 and the control unit 20 is led from the battery 12 along the vehicle body 1 to the front portion of the vehicle body 1 and is raised upward through the floor 2A. And it guide | induces ahead along the outer periphery of the housing 2B, is started up along the support | pillar 14 in the front part of the apparatus storage chamber 3, and is guided toward the center of the apparatus storage chamber 3. Here, the electric wire 31 is passed between the motor 18 and the base 6 </ b> C similarly to the electric wire 30, passes through the center of the device storage chamber 3, is guided to the rear, and then is hung down and connected to the control unit 20. . The electric wire 31 is appropriately fixed to the housing 2 </ b> B and the support column 14 in a wiring portion from the battery 12 to being raised at the front portion of the device storage chamber 3.
Although not shown, the contactor 24 and the primary side of the transformer 21 are connected by an electric wire, and the secondary side of the transformer 21 and the control unit 20 are also connected by another electric wire. Thus, the electric wire 31 continuously provided via the control unit 20 and the electric wire connecting the control unit 20 and the transformer 21 correspond to the second electric wire in the present invention.

  When charging the battery 12 in the electric premises transport vehicle as described above, the worker first moves the electric premises transport vehicle to a place where the charging facility is located and stops the vehicle on the spot. Thereafter, the electric wire 30 is pulled out from the device storage chamber 3, the outlet 30A is connected to an external power source, and the operation button (charging start button) of the charge controller 23 is operated. Then, electric power is supplied from the external power source via the electric wire 30 and is transmitted to the transformer 21 via the contactor 24. Then, the voltage transformed and rectified by the transformer 21 is supplied to the battery 12 via the control unit 20 and the electric wire 31, and the battery 12 is charged. When charging is completed after the necessary charging time has elapsed, the operator removes the outlet 30A from the external power supply, holds the operation part 26a of the slide bar 26, and moves the slide bar 26 away from the opening 4a (left direction). ) To store the electric wire 30 in the device storage chamber 3.

  According to such an embodiment, the device storage chamber 3 is provided with the transformer 21 and the charge controller 23 as a charging device, and the battery 12 is charged by pulling the electric wire 30 from the device storage chamber 3 by a required length. Therefore, it is not necessary for the operator to go to the charging wire or the charging device every time the charging operation is performed, and it is not necessary to prepare the electric wire and the charging device for each charging facility. In addition, after the battery 12 is fully charged, the electric wire 30 can be stored in the device storage chamber 3 by simply sliding the slide bar 26 without disturbing the turning of the swivel base 17 or the like. Will not interfere with other work or driving. Moreover, since the electric wire 30 is wound around the roller 27, the electric wire 30 can be stored and pulled out smoothly.

  Further, according to such an embodiment, the transformer 21 is disposed at an outer position of the motor 18 and the charge controller 23 and the contactor 24 are disposed at an upper position of the motor 18, so that the motor 18 is not obstructed. These can be connected by electric wires, and each side cover 4 can be removed from the support column 14, so that the side cover 4 can be removed to easily perform wiring work or maintenance work. Further, the guard 28 can prevent the stored electric wire 30 from coming into contact with the swivel base 17, the control unit 20 supported by the swivel base 17, and the steering handle 6. It is possible to protect internal devices from dust and water droplets that have entered the storage chamber 3. Even if the adhering water droplets travel along the electric wire 30, the electric wire 30 is hung down because it is hung down below the swivel 17 at a position outside the swivel 17 and the housing 2B. Water drops are dropped onto the floor 2 </ b> A at the location and discharged out of the equipment storage chamber 3. Therefore, there is no possibility that water droplets adhere to the swivel base 17 or the equipment on the swivel base 17.

In the above embodiment, the roller 27 is provided only on the slide bar 26. However, as shown in FIG. 7, the roller 27 is also provided on the guard 28 or the side cover 4, and the electric wire 30 is stored in a zigzag manner. Then, the length of the electric wire 30 that can be stored can be made longer.
Further, for example, a magnet catch or the like for holding the slide bar 26 at a position farthest from the opening 4 a can be provided on the left side wall 28 b of the guard 28. In this way, the state in which all the electric wires 30 are stored can be reliably maintained, the slide bar 26 moves unnecessarily due to vibration during traveling, etc., and the electric wires 30 come out of the device storage chamber 3 from the opening 4a. Can be prevented.
Further, a switch is provided so as to be turned on when the slide bar 26 is at a position farthest from the opening 4a. If the switch is turned off regardless of the operation of the accelerator lever 7, the control unit 20 causes the motor 18 to move. Can be prohibited. In this way, since the motor 18 can be driven, that is, traveled only when all the electric wires 30 are stored, it is possible to prevent the unstored portion from being damaged or traveling from being hindered.

It is a side view of the embodiment of the present invention. It is a top view of the embodiment of the present invention. It is a rear view of the embodiment of the present invention. It is a perspective view of the embodiment of the present invention. It is a perspective view of the embodiment of the present invention. It is a perspective view of the embodiment of the present invention. It is a perspective view of the embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 3 Equipment storage chamber 4 Side cover 4a Opening part 5 Top cover 6 Steering handle 6C Base 6D Shaft 8 Front wheel 12 Battery 14 Support column 17 Swivel base 18 Motor 20 Control unit 21 Transformer 23 Charge controller 24 Contactor 25 Fuse 26 Slide bar 27 Roller 28 Guard 29 Inner cover 30 Electric wire 30A Outlet 31 Electric wire

Claims (2)

A front wheel is provided at the front of the vehicle body so as to be able to turn around a vertical axis, and includes a device storage chamber in which a motor for driving the front wheel is stored above the front wheel. In an electric work vehicle in which a battery is mounted on a vehicle body, the motor, a control device for controlling the motor, and a turntable that is provided so as to be capable of turning with respect to the vehicle body in the equipment storage chamber and that rotates together with the front wheel, And a charging device for charging the battery is supported, and a first electric wire having one end connected to the charging device and the other end connected to an external power source is connected to the battery and the charging device. And a storage device that stores the first wire in the device storage chamber, and the first wire is stored in the device storage chamber by the storage device. Equipment yield And drawable lead portion to the outside, continuously partial, the Ri Do from in the equipment storage chamber and the extraction non internal wiring portion is guided to the charging device, also the equipment storage chamber to the vehicle body standing And a cover that is detachably attached to the support and forms an outer cover of the device storage chamber. The cover has an opening through which the first electric wire can be taken in and out of the device storage chamber. The storage device is provided with a sliding body that is slidable in a direction toward and away from the opening along the cover, and a rotating body that is rotatably provided on the sliding body. A rotating body around which the electric wire is wound, and the first electric wire is introduced into the device housing chamber through the opening, wound around the rotating body, and closer to the opening than the rotating body. After being folded back to the position Electric working vehicle, characterized by comprising guided to serial charger. A partition member for isolating the lead-out portion of the first electric wire stored by the storage device from the inside in the equipment storage chamber is provided over at least a slidable range of the sliding body. 2. The electric vehicle according to claim 1 , wherein the internal wiring portion is hung down to a position lower than the swivel base at a position outward from the swivel base and then led to the charging device. Work vehicle.

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