JPH0825412B2 - Electric vehicle hour meter - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an hour meter for an electric vehicle, and more specifically, a traveling device and a cargo handling device are mounted on a battery-powered battery vehicle, and the usage time of the battery vehicle is reduced. It relates to an hour meter that keeps time.

[Prior Art] Conventionally, an industrial vehicle, for example, a battery forklift truck, is equipped with an hour meter for measuring the usage time of the battery. This hour meter performs a timekeeping operation only while the key switch is turned on, and the time was used as a guideline for maintenance management of batteries, replacement parts and the like and management of working time.

[Problems to be Solved by the Invention] However, the conventional hour meter simply measures the time when the key switch is turned on, that is, measures the on time of the key switch. Therefore, when the forklift is left with the key switch turned on and when the forklift is used for traveling and loading and unloading work, there is a large difference in the amount of battery power consumption, the consumption of parts, and the amount of work. regardless of,
Since the ON time of the key switch is clocked, it is not appropriate to perform the maintenance management or the management of the working time based only on the usage time clocked by the hour meter.

An object of the present invention is to solve the above-mentioned problems and to be able to measure various usage times of the battery car when the power consumption and the like are different, and to display each usage time on one display unit for maintenance management. Another object is to provide an hour meter capable of more accurately managing the working time.

[Means for Solving the Problems] In order to achieve the above object, the first invention is an electric vehicle in which a cargo handling device is driven by a battery, and a display means for displaying a usage time of the electric vehicle and a key switch on. A switch detecting means for detecting an operation, a cargo handling presence / absence detecting means for detecting an operating state of the cargo handling device, an on-time measuring means for measuring an on time of a key switch based on the detection of the switch detecting means, and a cargo handling presence / absence detecting means. Working time clocking means for timing the cargo handling work time of the vehicle based on the detection, and storage means for storing the cumulative time of the on time clocked by the on time clocking means and the cumulative time of the cargo handling work time clocked by the working time clocking means Selection means for instructing the display means to display either the on-time or the accumulated time of the cargo handling work, and the selected accumulated time based on the selection of the selection means. The gist of the present invention is an electric meter for an electric vehicle, which is composed of a display control unit which is read from the display unit and displayed on the display unit.

In a second aspect of the present invention, in an electric vehicle in which a traveling device and a cargo handling device are driven by a battery, a display unit that displays a usage time of the electric vehicle, a traveling presence / absence detection unit that detects an operating state of the traveling device, and a cargo handling device Cargo handling presence / absence detection means for detecting the operating state, travel time timing means for timing the traveling time of the vehicle based on the detection of the traveling presence / absence detection means, and timing of the cargo handling work time for the vehicle based on the detection of the cargo handling presence / absence detection means Working time measuring means, storage means for storing the cumulative time of the traveling time measured by the traveling time measuring means and the cumulative time of the cargo handling work time measured by the working time measuring means, and the accumulated traveling time or the cargo handling work on the display means. Selection means for instructing to display any of the cumulative times of time, and display control means for reading out the selected cumulative time from the storage means on the display means based on the selection of the selection means It is referred to as the gist Hour Meters for Ranaru electric vehicle.

In a third aspect of the present invention, in an electric vehicle in which a traveling device and a cargo handling device are driven by a battery, a display unit that displays a usage time of the electric vehicle, a switch detection unit that detects an ON operation of a key switch, and an operation of the traveling device. A traveling presence / absence detecting means for detecting a state, a cargo handling presence / absence detecting means for detecting an operating state of the cargo handling apparatus, an on-time measuring means for measuring an on time of a key switch based on the detection of the switch detecting means, and a traveling presence / absence detecting means. On-time measured by the on-time measuring means, which measures the traveling time of the vehicle based on the detection of the running time, the working-time measuring means that measures the working time of the vehicle based on the detection of the cargo handling presence / absence detection means The storage means for storing the cumulative time of the traveling time, the cumulative time of the traveling time measured by the traveling time measuring means, and the cumulative time of the cargo handling work time measured by the working time measuring means, and the display means. Selection time, the cumulative time of the traveling time or the cumulative time of the cargo handling work, and the selected cumulative time based on the selection of the selecting means are read from the storage means and displayed on the display means. The gist is an electric vehicle hour meter including a display control means.

[Operation] In the first aspect of the present invention, the display control means selects the cumulative time of the on-time and the cumulative time of the cargo handling time stored in the storage means by the selection means, and the display control means selects the cumulative time. Is read from the storage means and displayed on the display means.

In the second aspect of the invention, the display control means stores the selected cumulative time by selecting either the cumulative time of the traveling time or the cumulative time of the cargo handling time stored in the storage means by the selection means. Read out and displayed on the display means.

In the third invention, the display control means is selected by selecting one of the cumulative time of the on-time, the cumulative time of the traveling time and the cumulative time of the cargo handling work stored in the storage means by the selection means. The accumulated time is read from the storage means and displayed on the display means.

[Embodiment] An embodiment in which the present invention is embodied in a battery forklift will be described below with reference to the drawings.

FIG. 1 shows a drive circuit of a battery-powered forklift and an electric block circuit of an hour meter. A key switch 2 is connected to a positive side bus bar P of a battery 1, and the bus bar P is connected to the key switch 2.
Between the negative side bus N and the negative side bus bar, the first load contactor drive for closing the lift limit switch 3 which is turned on and off in conjunction with the operation of the lift lever and the load contactor 7 which will be described later based on the switch 3 being turned on. A series circuit including a circuit 4 is connected, and a tilt limit switch 5 that is turned on / off in conjunction with the operation of a tilt lever and a cargo contactor 7 that will be described later are closed based on the switch 5 being turned on. A series circuit including the second cargo handling contactor drive circuit 6 is connected.

The cargo handling contactor 7 is connected in series with a cargo handling motor 8 as a cargo handling device composed of a DC motor, and its series circuit is connected between the busbars P and N. Then, the cargo handling motor 8 is driven by the voltage of the battery 1 being applied based on the closed circuit of the cargo handling contactor 7 to operate a lift cylinder for vertically moving a not-shown fork and a tilt cylinder for tilting the outer mast. Rotate the pressure pump.

Therefore, when the lift lever or tilt lever is operated for cargo handling work, the hydraulic pump is rotationally driven by the cargo handling motor 8 to supply hydraulic oil to the lift cylinder or tilt cylinder, and the fork is vertically moved or the mast is tilted. Will be.

Further, a series circuit including a traveling contactor 9, a traveling motor 10 as a traveling device composed of a DC motor, and a drive control circuit 11 is connected between the buses P and N. The traveling motor 10 is rotationally driven by closing the traveling contactor 9, and the rotational direction of the traveling motor 9 is controlled based on a forward / backward operating lever (not shown). The drive control circuit 11 chopper-controls the voltage applied to the traveling motor 10 according to the amount of depression of an accelerator pedal (not shown) to drive the traveling motor 10 to a rotation speed corresponding to the amount of depression of the pedal,
That is, the vehicle speed of the forklift is controlled.

A microcomputer 12 as a switch detection means, a traveling presence / absence detection means, a cargo handling presence / absence detection means, a timing means and a display control means is a central processing unit (hereinafter referred to as CPU) 13, a read-only memory (ROM) storing a control program.
As a storage means including a program memory 14 made up of, a working memory 15 made up of a readable and rewritable memory (RAM) for temporarily storing operation results and the like, and a non-volatile memory (EEPROM) for storing each cumulative time described later. It is composed of a time memory 16 and.

The three input terminals of the CPU 13 are bus bars P,
Between the lift limit switch 3 and the first cargo handling contactor drive circuit 4, and the tilt limit switch 5
And the second cargo-handling contactor driving circuit 6 are connected to detect the ON operation of the switches 2, 3 and 5.
Further, the vehicle speed sensor 17 is a sensor for detecting the rotation of the drive wheels driven by the traveling motor 10, and detects the passage of an object to be detected which is rotated with the rotation of the drive wheels, and a pulse signal based on the passage. Is output to the CPU 13. The CPU 13 detects that the forklift is traveling based on this pulse signal.

The CPU 13 has an on-time timer, a cargo handling timer, and a traveling timer built-in. When the CPU 13 detects an on-operation of the key switch 2, the on-time timer performs a timing operation only during the on-state, and the time is successively incremented. Is transferred to the time memory 16, and when an on operation of the lift or tilt switches 3 and 5 is detected, the cargo handling timer performs the time counting operation only during the on state, and the time is sequentially transferred to the time memory 16. Further, when the CPU 13 detects that the forklift is traveling based on the pulse signal, the CPU 13 causes the traveling timer during traveling to perform a time counting operation and sequentially transfers the time to the time memory 16.

Further, the CPU 13 has a counter, which counts the pulse signals from the vehicle speed sensor 17, calculates the traveling distance, and transfers the distance to the time memory 16.

The time memory 16 is divided into an on-time accumulated time storage area, a cargo handling accumulated time storage area, a traveling accumulated time storage area, and an accumulated distance storage area. Then, the CPU 13 sequentially adds the respective times and distances to be transferred to the times and distances previously stored in the corresponding storage areas of the time memory 16, and stores them in the same memory 16 as accumulated times and accumulated traveled distances.

The display changeover switch 18 as a selection means is provided in the driver's seat, and is operated when switching and selecting the display content of the display 19 as a display means also provided in the driver's seat, and the changeover signal is output to the CPU 13. It In response to this switching signal, the CPU 13 reads out the accumulated time or accumulated traveling distance of a predetermined storage area of the time memory 16 and displays it on the display 19.
The display content of the display 19 is switched every time the changeover switch 18 is operated, and in this embodiment, the CPU 13 displays the ON time accumulated time display → the traveling accumulated time display → the cargo handling accumulated time display → the traveling accumulated distance. The display is controlled so that the display order is switched.

As shown in FIG. 2, the display unit 20 of the display 19 is a numerical value display unit 21 for displaying a 5-digit number including a decimal point, and a time indication unit 2 for instructing that the numerical value display unit 21 indicates time.
2, a distance indicating section 23 for indicating that the display of the numerical value display section 21 indicates a distance, a cargo handling instructing section 24 for indicating that the display of the numerical value display section 21 indicates the cumulative time of the cargo handling work, and the numerical value display section 21.
And a traveling instruction section 25 for instructing that the display of the accumulated traveling time is indicated.
5 is display controlled.

Next, the operation of the hour meter configured as described above will be described.

When the key switch 2 is off, the CPU 13
Since the operating power is not applied from the battery 1 via the, the timers are not operated and the display 19 is not driven to display. At this time, since the time memory 16 is a non-volatile memory, the previously stored accumulated times and accumulated traveling distances are not erased but stored and retained.

Now, when the key switch 2 is turned on, the CPU 13 becomes operable in response to this on signal, and after initializing each timer and counter, the on time timer is timed based on the turning on of the key switch 2. It is made to operate and added to the cumulative time of the on time so far stored in the on time storage area of the time memory 16. Further, in this initial setting, the CPU 13 is set to the on-time accumulated time display mode, and the accumulated time in the on-time storage area is read out and the accumulated time is shown in the numerical display section 21 in FIG. To display. In this case, the CPU 13 controls the display of the time indicator 22 to indicate that the display of the display 21 is time, and the cargo handling and travel instruction units 24 and 25 to indicate that it is the cumulative time of the on-time. Is not displayed.

Next, when the forklift is run by rotating the running motor 10, the vehicle speed sensor 17 outputs a pulse signal of a cycle sequentially corresponding to the vehicle speed to the CPU 13, and the CPU 13 starts running, that is, the running motor 10 is supplied with battery power. Is applied, the running timer is timed and added to the cumulative running time stored in the cumulative running time storage area of the time memory 16. On the other hand, the CPU 13 calculates the traveling distance based on the counter and adds it to the accumulated traveling distance so far stored in the accumulated distance storage area of the time memory 16. Then, when the power of the traveling motor 10 is turned off and the forklift stops, the traveling timer and counter are reset, and the accumulated traveling time and traveling accumulated distance up to that time stored in the time memory 16 are stored and retained. It

When the lift lever or tilt lever is operated and the lift or tilt limit switches 3 and 5 are turned on, battery power is applied to the cargo handling motor 8 to start driving, and the cargo handling timer is timed. The cumulative time of the cargo handling work so far stored in the cargo handling time storage area of the time memory 16 is added. When the cargo handling motor 8 is powered off and the cargo handling work is stopped or finished, the cargo handling timer is reset and the accumulated time of the cargo handling work up to that time stored in the time memory 16 is stored and held.

Then, when the display changeover switch 18 is turned on, based on the ON signal, the CPU 13 switches from the on-time accumulated time display mode to the traveling accumulated time display mode, reads out the accumulated time in the traveling accumulated time storage area, and accumulates it. The time is displayed on the numerical display section 21 as shown in FIG. in this case,
The CPU 13 controls the display of the time instructing unit 22 to indicate that the display on the display unit 21 indicates time, and controls the traveling instructing unit 25 to indicate that it is the cumulative time of the traveling time.

Then, when the display changeover switch 18 is turned on, based on this ON signal, the CPU 13 switches from the traveling cumulative time display mode to the cargo handling cumulative time display mode and reads the cumulative time in the cargo handling cumulative time storage area to read the cumulative time. Is displayed on the numerical display section 21 as shown in FIG. In this case, CPU13
Controls the display of the time instruction unit 22 to show that the display of the display unit 21 is time, and controls the display of the cargo handling instruction unit 24 to show that it is the cumulative time of the cargo handling work.

Then, when the display changeover switch 18 is turned on, the CPU 13 switches from the cargo handling cumulative time display mode to the traveling cumulative distance display mode based on the ON signal, and reads the cumulative traveling distance in the cumulative distance storage area to read the cumulative traveling distance. Is displayed on the numerical display section 21 as shown in FIG. In this case, CPU1
3 controls the display of the distance instructing unit 23 to indicate that the display on the display unit 21 indicates the distance, and controls the display of the traveling instructing unit 25 to indicate the accumulated traveling distance.

As described above, in this embodiment, only by operating the change-over switch 18, the accumulated time of the cargo handling work, the accumulated time of the traveling time, and the on-time of the key switch 2 having different power consumptions of the battery 1 are displayed on one display 19. Since the accumulated time of each can be individually displayed, the working status of the battery vehicle can be accurately grasped, and maintenance management such as replacement of the battery 1 and other parts can be accurately performed, and The management can be accurately grasped.

Moreover, in the present embodiment, the traveling distance is also displayed, so that the maintenance management can be performed more accurately and the management of the working time can also be accurately grasped.

In this embodiment, a non-volatile memory is used as the time memory 16 as a storage means, but when the key switch 2 is turned off, each accumulated time and accumulated mileage are not erased.
For example, static RAM (SRAM) with backup power supply
May be implemented using.

Although the vehicle speed sensor 17 is used to detect whether or not the vehicle is running in the above-described embodiment, a sensor that detects the depression of the access pedal may be used. Further, the presence / absence of traveling or the presence / absence of cargo handling work may be determined by detecting armature currents of the traveling motor 10 and the cargo handling motor 8.

[Effects of the Invention] As described in detail above, according to the present invention, the usage time of the battery can be timed when the power consumption is different, and each usage time can be displayed by one display unit. Control or work time can be controlled more accurately, and it has an excellent effect as an hour meter for electric vehicles.

[Brief description of drawings]

FIG. 1 is an electric block circuit diagram of an hour meter embodying the present invention, FIG. 2 is a front view of a display, FIG. 3 is a diagram showing an accumulated on-time, and FIG. 4 is an accumulated run-time. FIG. 5, FIG. 5 is a diagram showing the cumulative time of the cargo handling work, and FIG. 6 is a diagram showing the cumulative traveling distance. In the figure, 1 is a battery, 2 is a key switch, 3 is a lift limit switch, 5 is a tilt limit switch,
8 is a cargo handling motor as a cargo handling device, 10 is a traveling motor as a traveling device, 12 is a microcomputer as each detecting means, each timing means and display control means, 13 is a CP
U and 16 are time memories as storage means, 17 is a vehicle speed sensor, 18 is a display changeover switch as selection means, 19 is a display as display means, 20 is a display section, and 21 is a numerical value display section.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshikazu Kurata 2-chome Toyota-cho, Kariya City, Aichi Prefecture Toyota Industries Corporation (56) Reference JP-A-56-66101 (JP, A) Special Kai 61-198287 (JP, A) JP 63-1522 (JP, B2)

Claims (3)

[Claims] 1. In an electric car in which a cargo handling device is driven by a battery, a display means for displaying a usage time of the electric car, a switch detection means for detecting an ON operation of a key switch, and an operating state of the cargo handling device. Cargo handling presence / absence detection means for detecting, on-time timing means for timing the on time of the key switch based on the detection by the switch detection means, and work for timing the cargo handling work time of the vehicle based on the detection by the cargo handling presence / absence detection means Time measuring means, storage means for storing the cumulative time of the on-time counted by the on-time measuring means and the cumulative time of the cargo-handling working time measured by the working-time measuring means, and the on-time or the cargo-handling working time on the display means Selecting means for instructing display of any one of the accumulated times, and reading out the selected accumulated time from the storage means based on the selection by the selecting means. Hour meter for electric vehicles comprising a display control means for displaying on the stage. 2. An electric vehicle in which a traveling device and a cargo handling device are driven by a battery, display means for displaying a usage time of the electric vehicle, traveling presence / absence detection means for detecting an operating state of the traveling device, and the cargo handling device. The cargo handling presence / absence detecting means for detecting the operating state of the vehicle, the traveling time measuring means for timing the traveling time of the vehicle based on the detection of the traveling presence / absence detecting means, and the cargo handling work time of the vehicle based on the detection of the cargo handling presence / absence detecting means. And a storage means for storing the cumulative time of the traveling time measured by the traveling time measuring means and the cumulative time of the cargo handling work time measured by the working time measuring means, and the traveling time on the display means. Selection means for instructing to display either the cumulative time of the above or the cumulative time of the cargo handling operation, and the selected cumulative time is read from the storage means based on the selection by the selecting means. Hour meter for electric vehicles comprising a display control means for displaying on the display means. 3. An electric vehicle in which a traveling device and a cargo handling device are driven by a battery, display means for displaying a usage time of the electric vehicle, switch detection means for detecting an ON operation of a key switch, and A traveling presence / absence detecting means for detecting an operating state, a cargo handling presence / absence detecting means for detecting an operating state of the cargo handling apparatus, an on-time measuring means for measuring an on-time of a key switch based on the detection by the switch detecting means, and the traveling A traveling time measuring means for measuring the traveling time of the vehicle based on the detection of the presence / absence detecting means, a working time measuring means for measuring the loading / unloading working time of the vehicle based on the detection of the cargo presence / absence detecting means, and the on-time measuring means Accumulated on-time time,
Storage means for storing the cumulative time of the traveling time measured by the traveling time counting means and the cumulative time of the cargo handling working time measured by the working time counting means, and an on-time, cumulative time of the traveling time or cargo handling work on the display means. For an electric vehicle comprising selection means for instructing to display any one of cumulative times of time, and display control means for reading out the selected cumulative time from the storage means and displaying it on the display means based on the selection of the selection means. Hour meter.