JP2006136119A - Charger of working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide the charger of a working vehicle in which an assembling section battery can be charged from both a commercial power supply and the traveling battery of a hybrid car by using a plurality of chargers. <P>SOLUTION: The charger 80 being mounted on a high-place working vehicle 1 comprising an engine 61, a traveling motor 62, a traveling battery 64, and a power drive unit 65 for controlling delivery of power between the traveling motor 62 and the traveling battery 64 and traveling by rotating a rear wheel 3b by the output from the engine 61, and further comprising a high-place working unit (boom 5, or the like) provided on the body 2, and an assembling section battery 31 for driving the working unit, is constituted of a first charger 81 for charging the assembling section battery 31 by obtaining power from the commercial power supply, a second charger 82 for charging the assembling section battery 31 by obtaining power from the traveling battery 64, and a charge controller 83 for connecting the first charger 81 and the second charger 82 with the assembling section battery 31. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a charging device that is used in a working vehicle having a work device and a body part battery that drives the work device on a vehicle body and charges the body part battery. The present invention relates to a work vehicle charging device mounted on a work vehicle using a hybrid vehicle.

  In a working vehicle such as an aerial work vehicle, as a method of driving a working device provided on the vehicle body, a driving engine of the aerial work vehicle is driven and a PTO (power take-off) attached to a transmission is used. It is known that an oil pump is driven using power extracted from a mechanism) so that a working device is driven by hydraulic oil discharged from the oil pump. However, when the engine is driven to extract power, noise is generated due to engine driving sound. For this reason, a bodywork battery is provided on the vehicle body separately from the PTO, and when working using the work device, the engine is stopped, the electric motor is driven by this bodywork battery, and the oil pump is driven by this electric motor. A method of driving the working device by operating is used.

  When driving the work equipment using such a body part battery, it is necessary to charge the body part battery in advance, and it is attached to the engine in the same manner as the PTO or the method of charging using a commercial power source. There is known a charging device using a method of obtaining power from a generator and charging it (see, for example, Patent Document 1).

Japanese Patent Publication No. 5-73614

  However, in the working vehicle configured as described above, it is important to efficiently charge the body part battery for driving the working device. However, in the conventional charging device for the working vehicle, There is a problem that charging can be performed only from one of the generators attached to the engine, and it takes time to charge the bodywork battery. In particular, in the case of a working vehicle using a hybrid vehicle that assists the output of the engine with a travel motor, the travel motor is driven to drive the travel motor during acceleration and to charge the electric energy generated from the travel motor during deceleration. A battery is mounted, and it is necessary to efficiently charge the body part battery using this hybrid system.

  The present invention has been made in view of the problems as described above, and is a work vehicle that can charge a body part battery from both a commercial power source and a traveling battery of a hybrid vehicle using a plurality of chargers. An object is to provide a charging device.

  In order to solve the above-described problems, a charging device according to the present invention controls an engine, a motor (for example, the traveling motor 62 in the embodiment), a traveling battery, and power exchange between the motor and the traveling battery. A working vehicle that has a power drive unit and travels by rotating wheels (for example, the rear wheel 3b in the embodiment) according to the output of the engine, and when the vehicle is accelerated by rotating the wheels by the engine, the power drive unit is for traveling A vehicle body having a hybrid system in which the power drive unit supplies the battery power to the motor and assists the engine output by the motor, and the power drive unit charges the running battery with the electric power generated from the motor when decelerating. Provided working device (for example, the boom 5 in the embodiment) and the vehicle body. The vehicle is mounted on a work vehicle (for example, an aerial work vehicle 1 in the embodiment) including a body part battery that drives the work device, and the body part battery is charged with power from a commercial power source. 1 charger, the 2nd charger which acquires electric power from a battery for driving, and charges a body part battery, and the charge control device which connects the 1st charger and the 2nd charger to the body part battery Is done.

  At this time, it is preferable that the charge control device is configured to select one of the first charger and the second charger to charge the bodywork part battery.

  In addition, when the first charger is connected to the commercial power source, the charging control device selects the first charger to charge the bodywork battery, and the first charger is not connected to the commercial power source. Is preferably configured to select the second charger to charge the bodywork battery.

  Or it is preferable that a charge control apparatus is comprised so that electric power may be simultaneously supplied to a body part part battery from a commercial power source and a battery for driving | running | working by a 1st charger and a 2nd charger.

  Furthermore, it has the 3rd charger which obtains electric power from a commercial power source, and charges the battery for driving | running | working, and after a charge control apparatus is charged by the 1st charger and a body part battery is fully charged, 3rd It is preferable that the battery for traveling is charged by the charger.

  When the charging device for a working vehicle according to the present invention is configured as described above, the hybrid system for running not only the commercial power supply but also the vehicle body for charging the bodywork battery that drives the working device provided on the vehicle body. Therefore, it is possible to select an appropriate charging method according to the working state of the working vehicle and the charging capacity of the bodywork battery, and the working device of this working vehicle. Can be prevented from being interrupted due to insufficient charging of the bodywork battery. At this time, the charge control device selects one of the first and second chargers to charge the bodywork battery, or when the first charger is connected to the commercial power source, By selecting and preferentially charging the body part battery, it becomes easy to select a charging method according to the situation.

  Moreover, the body part battery can be charged efficiently and in a short time by simultaneously obtaining power from the commercial power source and the traveling battery by the first and second chargers and charging the body part battery.

  Further, the third battery charger is configured to charge the running battery after the bodywork battery is fully charged, so that not only the bodywork battery but also the running battery is charged by the commercial power source. Therefore, since sufficient motor output can be assisted by the motor immediately after the work vehicle is started, comfortable acceleration performance can be obtained and fuel consumption can be improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, as an example of a working vehicle on which the charging control device according to the present invention is mounted, an overall configuration of an aerial work vehicle 1 in which an aerial work device is mounted on a vehicle body will be described with reference to FIG. The aerial work vehicle 1 has a driving cabin 2a in front of a vehicle body 2 and is configured based on a truck chassis that can travel on front and rear wheels 3a and 3b. On the vehicle body 2 behind the driving cabin 2a, a swivel base 4 is mounted so as to be able to swivel horizontally and is driven by a swivel motor 51 provided below the swivel base 4. A boom 5 is pivotally connected to the upper part of the swivel 4, and is configured to move up and down by a hoisting cylinder 52 stretched between the swivel 4 and the lower surface of the boom 5. The boom 5 is configured such that a proximal boom 5a, an intermediate boom 5b, and a distal boom 5c are combined in a telescopic manner, and can be expanded and contracted by a built-in telescopic cylinder 53.

  A support member 6 is attached to the front end portion of the front end boom 5c so as to be swingable up and down on the same plane as the undulating surface of the boom 5. The support member 6 has a vertical post portion (not shown), and swinging control of the support member 6 is performed by a leveling cylinder (not shown) disposed between the tip boom 5 c and the support member 6. The swing control (leveling control) is performed so that the vertical post portion always extends vertically regardless of whether the boom 5 is raised or lowered.

  The work table 8 is attached to the vertical post portion that is always held vertically in this manner so as to be able to turn horizontally (swing freely) via the arm 7. Regardless of the undulations, it is always kept horizontal. In addition, the winch 18 is provided in the upper end part of the supporting member 6, and it is comprised so that a heavy load can be lifted.

  A boom operating device 10 is provided on the work table 8. The boom operation device 10 is provided with an operation lever for operating the swivel base 4 and the boom 5, various operation switches, and the like. For this reason, in the aerial work vehicle 1, an operator who has boarded the work table 8 operates the boom operation device 10 to turn the swivel 4, raise and lower the boom 5, extend and retract, and swing the work table 8. Thus, it is possible to move to a desired high position.

  In the aerial work vehicle 1 configured as described above, the boom 5 is used as an arm when the work table 8 is moved by turning or extending the boom 5 or when a heavy object is lifted by the winch 18. A moment (generally referred to as “falling moment”) that causes the vehicle to fall is applied. Therefore, in order to stably support the vehicle body 2 against this overturning moment, outrigger jacks 9 are provided at four locations on the front, rear, left and right of the vehicle body 2.

  The illustrated outrigger jack 9 is of a so-called H type, and is configured such that the jack provided at the side end of the outrigger inner box can be expanded / contracted to the left / right by operating the slide cylinder built in the horizontal rectangular outrigger box. Has been. Each outrigger jack 9 includes a vertically long box-like outer post 9a extending vertically, an inner post 9b that is telescopically inserted into the outer post 9a and slidable up and down, and a jack cylinder 54 built in between these posts. The upper end portion (cylinder side end portion) of the jack cylinder 54 is connected to the outer post 9a, and the lower end rod side end portion is connected to the inner post 9b. For this reason, by extending the jack cylinder 54, the inner post 9b protrudes downward from the outer post 9a, and the grounding plate 9c provided at the lower end of the inner post 9b is grounded to the ground to lift and support the vehicle body 2. It is configured to be possible.

  A jack ground detector 11 that detects that the outrigger jack 9 is grounded is provided at the upper end of the jack cylinder 54 of the outrigger jack 9.

  A jack operating device 20 for operating the outrigger jack 9 is provided at the rear of the vehicle body 2, and a control unit 30 for controlling the operation of the outrigger jack 9 at the top of the vehicle body 2, a turning motor 51, a hoisting cylinder 52, and an expansion cylinder 53, a hydraulic unit 40 that supplies hydraulic oil to the jack cylinder 54 and the like (hereinafter collectively referred to as “actuator 50”) is provided.

  In this embodiment, the aerial work vehicle 1 is configured on the basis of a hybrid vehicle that travels by assisting the engine power with a motor, and the configuration of the hybrid vehicle will be described below with reference to FIG. . In FIG. 2, the flow of electric power is indicated by a thick solid line, the flow of electrical signals is indicated by a thin solid line, and the flow of hydraulic oil is indicated by a broken line.

  The aerial work vehicle 1 includes an engine 61 for traveling the vehicle, a traveling motor 62 connected to the engine 61, and a transmission 63 that shifts the outputs of the engine 61 and the traveling motor 62 and transmits them to the rear wheels 3b. And a hybrid system 60 including a traveling battery 64 and a power drive unit 65 that connects the traveling battery 64 and the traveling motor 62 to control power transfer between the traveling battery 64 and the traveling motor 62. is doing. The engine 61 and the traveling motor 62 constitute a parallel hybrid system in which output shafts are connected in series.

  Here, the traveling motor 62 is constituted by, for example, a three-phase squirrel-cage induction machine, and acts as a starter by the electric power of the traveling battery 64 when the engine 61 is started, and the engine 61 when the aerial work vehicle 1 is accelerated. In addition to the rotational output from the vehicle, the traveling motor 62 is driven to rotate to assist the output (torque) of the engine 61. On the other hand, when the work vehicle 1 is decelerated, the traveling motor 62 acts as a generator. The vehicle is configured to convert the deceleration energy of the vehicle into electric energy (electric power) and charge the traveling battery 64.

  The power drive unit 65 includes an inverter unit for transferring power between the traveling motor 62 and the traveling battery 64, a rotation sensor 66 that detects the rotational speed of the engine 61, and the vehicle speed of the aerial work vehicle 1. A vehicle speed sensor 67 for detecting the position of the accelerator, an accelerator sensor 68 for detecting the opening of the accelerator, a signal from the clutch switch 69 for detecting the clutch state, and the key switch 70 are interlocked. When the vehicle 1 is in a starting state, the engine 1 includes an engine 61, a traveling motor 62, and an engine control unit that controls the traveling battery 64 based on signals from the above sensors.

  In particular, by using such a hybrid system 60, even if the engine 61 is stopped while the aerial work vehicle 1 is stopped, it can be started quickly by the traveling motor 62. Thus, the fuel consumption can be improved by charging the electric energy obtained during deceleration and assisting the output of the engine 61 by the traveling motor 62.

  Next, the operation mechanism of the aerial work device (such as the above-described boom 5) provided on the vehicle body 2 is an operation signal from the boom operation device 10 or the jack operation device 20 or a detection signal from the jack grounding detector 11. In response, the controller 30 controls the actuator 50, the hydraulic unit 40 that supplies hydraulic oil to operate the actuator 50, and the body part battery 31 for driving the aerial work apparatus.

  The hydraulic unit 40 includes a first pump 42 and a second pump 44, and the first pump 42 is driven by power extracted by a power take-off mechanism (PTO) 71 attached to the transmission 63 described above. The second pump 44 is driven by the second motor 43 that is driven by receiving power supply from the body part battery 31. The first pump 42 and the second pump 44 are configured such that either one of the switches 32 and 33 is switched by the controller 30 to drive one, and the hydraulic oil is supplied from the hydraulic oil tank 45 to the first or second. It is sucked up by the pumps 42 and 44 and supplied to the control valve 46. The operation of the control valve 46 is controlled by the controller 30, and the operation of the actuator 50 is controlled by controlling the supply and discharge of hydraulic oil supplied from the first or second pumps 42 and 44.

  Now, a first embodiment of the charging device for charging the body part battery 31 in the aerial work vehicle 1 configured as described above will be described with reference to FIG. In FIG. 3, only the components necessary for the description are shown, and the others are omitted.

  The charging device 80 obtains electric power from a commercial power source through an outlet 81a and charges the body part battery 31 and second charging obtains electric power from the traveling battery 64 and charges the body part battery 31. Connected to the circuit of the charger 82, the first and second chargers 81, 82 and the body part battery 31 to control the connection between the first and second chargers 81, 82 and the body part battery 31. And a charging control device 83. Each of the first and second chargers 81 and 82 has a function of detecting the charging state of the body part battery 31, and the body part battery 31 has a predetermined charge amount (hereinafter referred to as “full charge”). It is configured to charge until

  The charging control device 83 includes a control unit 83 a that performs switching control of the first and second chargers 81 and 82, and an operation unit 83 b that operates the charging control device 83. The operation unit 83b includes a charge start switch for instructing the start of charging of the body part battery 31, and a mode selection switch for selecting a charge mode. Here, as shown in FIG. 4, the charging mode includes a mode 1 in which the body part battery 31 is charged from a commercial power source using the first charger 81, and a traveling battery 64 using the second charger 82. The mode 2 for charging the body part battery 31 and whether or not the commercial power is supplied to the first charger 81 are determined. If the commercial power is supplied, the first charger 81 is used to mount the body power. The third battery 31 is charged and when the commercial power is not supplied, the second charger 82 is used to charge the overhead battery 31 and the first and second chargers 81 and 82 are used for commercial use. Mode 4 in which the body part battery 31 is charged by using the power source and the running battery 64 at the same time, and the control unit 83a controls the first and second chargers 81, 81 according to the selection of the mode selection switch of the operation unit 83b. 83 for bodywork To connect to Teri 31.

  Thus, by providing the charging device 80 with the first and second chargers 81 and 82 and obtaining power from the commercial power source and the running battery 64 to charge the body battery 31, An appropriate charging method can be selected according to the working state of the aerial work vehicle 1 and the charging capacity of the bodywork battery 31, and the aerial work performed by the aerial work device of the aerial work vehicle 1 It is possible to prevent interruption due to insufficient charging of the battery 31.

  That is, when a commercial power source is available when not working on the aerial work vehicle 1, selecting the mode 1 does not affect the traveling battery 64 of the traveling hybrid system 60, so that the body part battery is not affected. 31 can be charged, and when it is desired to charge the body part battery 31 for working at a high place when commercial power is not available, the mode battery 2 can be selected by selecting mode 2. The charging unit battery 31 can be charged. Similarly, the control unit 83a determines whether or not commercial power is being supplied to the first charger 81, and enters the mode 3 for switching the first and second chargers 81 and 82, whereby the first charger The body part battery 31 can be charged by detecting the state 81 and automatically switching between the first and second chargers 81 and 82. In addition, by selecting the mode 4, the body part battery 31 can be charged using the power of the commercial power source and the traveling battery 64 at the same time. Therefore, the body part battery 31 is efficiently charged in a short time. be able to.

  Note that the above-described charging modes may be all provided, or any one or some combination may be implemented in the charging control device 83.

  The charging device 80 according to the first embodiment described above cannot charge the traveling battery 64 with a commercial power source, but the charging device 80 ′ according to the second embodiment shown in FIG. It is possible to charge the battery 64 for traveling. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The charging device 80 ′ according to the second embodiment is different from the charging device 80 according to the first embodiment in that a third charger 84 that obtains electric power from a commercial power source and charges the traveling battery 64 is a first charger 81. Connected in parallel. The third charger 84 is connected to the traveling battery 64 via a charging control device 83 ′. The charging control device 83 ′ is configured so that the mode 5 can be selected from the operation unit 83b in addition to the four modes in the first embodiment (see FIG. 6). The controller 83 a ′ charges the body part battery 31 with the first charger 81, stops charging the body part battery 31 when the body part battery 31 is fully charged, and uses the third charger 84. The battery 64 for running is charged. The charging device 80 ′ is connected to the power drive unit 65. When the engine 61 is started, the third mode is selected even when the mode 5 is selected and the body part battery 31 is fully charged. By configuring the battery charger 64 not to charge the battery for traveling 64, overcharging of the battery for traveling 64 can be prevented.

  By configuring the charging device 80 ′ in this way, not only the body part battery 31 but also the traveling battery 64 can be charged by the commercial power source, so that the traveling motor 62 is started immediately after the aerial work vehicle 1 is started. As a result, sufficient output assistance of the engine 61 can be obtained, so that comfortable acceleration performance can be obtained and fuel consumption can be improved. In addition, you may comprise the 1st charger 81 and the 3rd charger 84 integrally.

It is a perspective view which shows the aerial work vehicle where the charging device which concerns on this invention is mounted. It is a block diagram which shows the structure of the drive part which drive | works an aerial work vehicle, and the structure of the drive part which drives an aerial work apparatus. It is a block diagram which shows 1st Example of the charging device which concerns on this invention. It is a table | surface explaining the charging mode in 1st Example. It is a block diagram which shows 2nd Example of the charging device which concerns on this invention. It is a table | surface explaining the charging mode in 2nd Example.

Explanation of symbols

1 Aerial work vehicle (work vehicle)
2 Body 3b Rear wheel (wheel)
5 Boom (Working device)
31 Bodywork Battery 60 Hybrid System 61 Engine 62 Motor for Driving (Motor)
64 Battery for driving 65 Power drive unit 80 Charging device 81 First charger 82 Second charger 83 Charging control device 84 Third charger

Claims (5)

An engine, a motor, a battery for traveling, and a working vehicle that has a power drive unit that controls transmission and reception of electric power between the motor and the traveling battery, and travels by rotating wheels according to the output of the engine; When the engine is accelerated by rotating the wheel, the power drive unit supplies the electric power of the traveling battery to the motor to assist the output of the engine by the motor, and when it decelerates, it is generated from the motor. A work comprising a vehicle body having a hybrid system in which the power drive unit charges the traveling battery with electric power, a work device provided on the vehicle body, and a body part battery provided on the vehicle body for driving the work device. A charging device mounted on a vehicle for a vehicle,
A first charger for obtaining power from a commercial power source and charging the bodywork battery;
A second charger that obtains electric power from the traveling battery and charges the bodywork battery;
A charging device for a working vehicle, comprising: a charging control device that connects the first charger and the second charger to the body part battery. The charge control device is
2. The charging device for a working vehicle according to claim 1, wherein either one of the first charger and the second charger is selected to charge the bodywork battery. The charge control device is
When the first charger is connected to the commercial power source, the first charger is selected to charge the bodywork battery, and when the first charger is not connected to the commercial power source The charging device for a working vehicle according to claim 1 or 2, wherein the second battery charger is selected to charge the bodywork battery. The charge control device is
The first battery charger and the second battery charger are configured to simultaneously supply power to the bodywork battery from the commercial power source and the traveling battery to charge the bodywork battery. The charging device for the working vehicle according to 1. A third charger that obtains electric power from the commercial power source and charges the traveling battery;
The charge control device is
5. The battery pack for charging is configured to be charged by the third charger after the body charger battery is fully charged by the first charger. The working vehicle charging device according to claim 1.

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