JP5271569B2 - Garbage truck - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable low noise and clean garbage collecting work by the use of independent electric energy without using external electric power, in a garbage collecting vehicle. <P>SOLUTION: This garbage collecting vehicle is provided with an engine 40, a packer system 60 collecting and discharging garbage, and a hydraulic pump 51 feeding energy for driving this packer system 60. Moreover, it is provided with a generator 41 driven by the engine 40, an electric double layer capacitor 43 (storage device) storing the electric power of the generator 41, and an electric motor 44 driving the hydraulic pump 51. The electric power of the capacitor 43 is fed to the electric motor 44 in the halt condition of the engine 40 by a control device 50, and the packer system 60 is activated by using the electric energy. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a garbage collection vehicle including an engine, a packer system that collects and discharges dust, and a hydraulic pump that supplies energy for driving the packer system, and more particularly, a dust collection in which the hydraulic motor is driven by a generator. It is about cars.

  Conventionally, a garbage collection vehicle is connected to a dust storage box mounted on the vehicle body, a rear opening of the dust storage box, a dust input box equipped with a dust loading device, a dust input box and a dust storage A hydraulic cylinder that tilts or rotates the box, a hydraulic cylinder that drives the dust loading device, a hydraulic motor, and the like are provided (hereinafter, a system that collects and discharges the dust is referred to as a packer system).

  In general, the driving force of a hydraulic pump that supplies energy for driving the packer system is supplied through a power take-off device (power take-off device: PTO), which is connected to the engine of the garbage truck.

  For this reason, the dust collection vehicle needs to rotate the engine at a high speed in order to efficiently drive the dust loading device when collecting dust.

  However, in recent years, collection work of dust is sometimes performed at night in order to prevent animals such as cats and crows from ruining the dust. In such a case, it is a nuisance to neighboring residents to perform collection work with the engine running at a high speed.

  A dust collecting device for collecting dust generated in a building is usually provided in the basement of the building. If the engine is driven at a high speed in the basement when collecting the dust in the dust collecting apparatus in a garbage truck, a large amount of exhaust gas is generated, and the working environment is deteriorated.

  Therefore, for example, in the refuse collection vehicle of Patent Document 1, generated by a hydraulic pump that operates a loader that loads dust, an electric motor that drives the hydraulic pump, and an induction machine that is connected to the engine when the dust is loaded. An inverter circuit that converts the converted AC power into DC power and supplies it to the motor, and a battery that stores excess electrical energy from the inverter circuit and supplies the electrical energy necessary for the motor when loading garbage ing.

By supplementarily supplying power from this battery, the engine speed is reduced to reduce noise and exhaust gas.
Japanese Patent Laid-Open No. 5-4702

  However, in the garbage collection vehicle of the above-mentioned patent document 1, the engine is not completely stopped, so that there is still sufficient room for noise and exhaust gas reduction.

  On the other hand, when the engine is completely stopped, special equipment such as an external outlet for powering the garbage collection vehicle is required. However, there is a problem that dust collection work cannot be performed in a place without such equipment.

  The present invention has been made in view of such points, and the object of the present invention is to enable low-noise and clean dust collection work using unique electric energy without using external power. is there.

  In order to achieve the above object, according to the present invention, the packer system is driven using the electric power stored in the power storage device without driving the engine when collecting dust.

  Specifically, the first invention presupposes a refuse collection vehicle including an engine, a packer system that collects and discharges dust, and a hydraulic pump that supplies energy for driving the packer system.

And the garbage truck is
A generator driven by the engine;
A power storage device for storing the power of the generator;
An electric motor for driving the hydraulic pump;
A control device that controls the packer system and supplies the electric motor with electric power from the power storage device when the engine is stopped;
A charging path for sending the power of the generator to the power storage device;
An emergency path for sending the power of the generator to the electric motor without going through the power storage device,
The charging path is provided with a first switch circuit, a charge regulator that adjusts power from the generator and sends the power to the power storage device, and the power storage device. A two-switch circuit is provided and connected to the control device;
A third switch circuit is connected to the emergency path, and is directly connected to the control device.
The control means is configured to be automatically switchable between the charging path and the emergency path by the first, second and third switch circuits, and when there is an abnormality in the power storage device, It is comprised so that the electric power of the said generator may be sent to the said electric motor .

According to the above configuration, when collecting dust, the packer system is driven using the power stored in the power storage device by driving the engine in advance, so that the collection operation is performed with the engine stopped. For this reason, noise is reduced and exhaust gas is not discharged without using external power. Further, at the time of charging, the electric power of the generator is sent to the power storage device through the charging path and charged. In addition, when there is an abnormality in the power storage device, such as when the electrical energy stored in the power storage device is insufficient in the dust collection operation, the control means automatically sets the emergency route through the first, second and third switch circuits. The recovery operation is not interrupted by switching to, driving the engine, and sending the power of the generator to the electric motor via the emergency path.

As described above, according to the present invention, the engine is stopped and the packer system is driven by using the electrical energy stored in the power storage device, so that it is possible to reduce noise without using external power. It is suitable for collection work at night or in the basement of the building because it can perform clean dust collection work. In addition, the control means is configured to be able to automatically switch between the charging path and the emergency path by the first, second and third switch circuits, and drives the engine to supply the electric power of the generator via the emergency path. It is possible to prevent the collection operation from being interrupted by sending to.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a refuse collection vehicle 1 according to an embodiment of the present invention, and a packer system 60 for collecting and discharging dust is provided on a vehicle body 2 of the dust collection vehicle 1. An engine 40 for driving the traveling and packer system 60 is mounted on the vehicle body 2. The configuration of the packer system 60 will be described in detail below.

  As shown in FIG. 2, a dust container 3 is mounted on the vehicle body 2 of the garbage truck 1. In the rear opening 4 of the dust container 3, there is provided a dust throwing box 6 pivotally supported by a throwing box support pin 5 above. This dust throwing box 6 is configured to be rotatable around a throwing box support pin 5 by a rotating cylinder 9 shown in FIG. 1 provided between the dust container 3 and the dust throwing box 6.

  A throwing port 7 is opened at the rear of the dust throwing box 6, and a dust loading device 30 is provided in the inside. The dust loading device 30 is for compressing and loading the dust 55 put into the dust throwing box 6 through the filling port 7 into the dust containing box 3.

  As shown also in FIG. 3, guide groove members 8 are laid on both side walls of the dust box 6 from the front upper part toward the rear lower part also serving as a reinforcing frame. A sliding plate 10 that extends to the full width is accommodated in the dust box 6. Guide rollers 11 are rotatably provided above and below both side edges of the sliding plate 10. These guide rollers 11 are slidably fitted along the inner wall of the guide groove member 8.

  A sliding plate support shaft 12 is inserted into the boss portion 20 provided at the left and right end portions of the upper portion of the back surface of the sliding plate 10. The sliding plate support shaft 12 matches the sliding distance of the sliding plate 10 so as to protrude beyond the inside of the dust throwing box 6 beyond the sliding opening 31 formed on the side wall of the dust throwing box 6. Has been placed.

  Sliding provided between the sliding plate support shaft 12 projecting outward from the side wall of the dust input box 6 and the lower part of the dust input box 6 along the inclination direction of the guide groove member 8 outside the dust input box 6. A cylinder 13 is connected. The sliding cylinder 13 includes a rod-shaped cylinder rod 13 a and a cylindrical cylinder tube 13 b attached to the side wall of the dust box 6. The sliding plate 10 is reciprocated up and down along the guide groove member 8 by the expansion and contraction operation of the sliding cylinder 13.

  As shown in FIG. 2, at the lower end of the sliding plate 10, a compression plate 15 that extends to the full width of the dust box 6 is supported so as to be swingable back and forth. The tip of the compression plate 15 is slightly bent toward the front. A swing cylinder 14 is connected between a connecting portion 15a projecting from the back surface of the compression plate 15 and a slide plate support shaft 12 provided at the upper back of the slide plate 10. The compression plate 15 is swung back and forth by an expansion / contraction operation 14.

  A discharge plate 17 is slidably disposed in the dust container box 3 in the front-rear direction. The discharge plate 17 is a plate-like body formed to have substantially the same width and height as the dust storage box 3 and slides back and forth in the dust storage box 3 by the expansion and contraction operation of the discharge cylinder 16. ing.

  As shown in FIG. 4, the garbage truck 1 includes a hydraulic pump 51 that supplies energy for driving the packer system 60. The hydraulic pump 51 is, for example, a variable discharge pump, and is configured to be electrically controlled by a control device 50 described later. The hydraulic pump 51 is normally driven at 1500 to 1800 rpm and can change the discharge amount.

  Hereinafter, the configuration of the power transmission device 52 that transmits power to the hydraulic pump 51 will be described.

  The garbage truck 1 includes a generator 41 driven by the engine 40. The generator 41 is installed separately from a small generator (dynamo) that is normally mounted on the vehicle body 2 and is always driven by a fan belt of the engine 40. The generator 41 may be driven only when necessary.

  The electric power of the generator 41 can be transmitted to the electric double layer capacitor 43 as a power storage device through the charging path 42. The generator 41 is configured to be connectable to an emergency path 45 that is sent to the electric motor 44 without passing through the electric double layer capacitor 43. Specifically, the charge path 42 is provided with a first switch circuit 46, a resistor 49 as a charge regulator, and the electric double layer capacitor 43. A second switch circuit 47 is provided on the downstream side of the electric double layer capacitor 43 and is connected to the control device 50. On the other hand, a third switch circuit 48 is connected to the emergency path 45 and is directly connected to the control device 50. The charging path 42 and the emergency path 45 can be switched by performing on / off control of the first to third switch circuits 46 to 48.

  The electric double layer capacitor 43 (so-called capacitor) plays a role of storing the electric power of the generator 41 and uses a physical phenomenon that does not use a chemical reaction like a battery and simply stores electric charge, and thus has a very long life. In addition, since charging is possible with a large current, the charging time is very short and it is relatively inexpensive. The electric double layer capacitor 43 of this embodiment includes a monitor device 53, which monitors the cell temperature and cell voltage inside the electric double layer capacitor 43 and transmits the signal to the control device 50. Playing a role. The monitoring device 53 may be provided separately from the electric double layer capacitor 43, and may monitor other elements such as current.

  The resistor 49 plays a role of adjusting the electric power from the generator 41 and sending it to the electric double layer capacitor 43. The control device 50 is configured to control the resistor 49 in response to a signal from the monitor device 53.

  Further, the control device 50 receives the signal from the monitor device 53 and controls on / off of the first to third switch circuits 46 to 48 and also serves as an inverter. The control device 50 also performs control such as starting and stopping of the packer system 60.

  An electric motor 44 that drives the hydraulic pump 51 is provided downstream of the control device 50. In the present embodiment, the electric motor 44 is a permanent magnet synchronous electric motor 44. Since this permanent magnet synchronous electric motor 44 is driven by vector control, the size is about half and the mass is about half that of the conventional induction motor, and the efficiency is extremely high. Therefore, the electric energy stored in the electric double layer capacitor 43 is reduced. Can be used efficiently.

  With this configuration, the control device 50 can supply the electric power of the electric double layer capacitor 43 to the electric motor 44 when the engine 40 is stopped.

  If the power transmission device 52 is replaced with a conventional power take-off device, most of the conventional parts can be used.

-Monitoring function of electric double layer capacitor-
Next, a monitoring function during charging of the electric double layer capacitor 43 will be described.

  First, as shown in FIG. 4, in order to charge the electric double layer capacitor 43, the engine 40 is driven and the generator 41 is rotated to generate electric power. Usually, charging is performed while the vehicle body 2 is moving.

  The control device 50 turns on the first switch circuit 46 and turns off the second switch circuit 47 and the third switch circuit 48. Thus, at the time of charging, electric power is supplied from the generator 41 to the electric double layer capacitor 43 via the charging path 42, and charging is started.

  Next, as shown in FIG. 5, when charging is started, the monitor device 53 starts monitoring, and if the cell voltage of the electric double layer capacitor 43 monitored by the monitor device 53 is equal to or higher than the maximum value in step S01. The process proceeds to step S02, and if smaller than the maximum value, the process proceeds to step S03.

  In step S02, the control device 50 performs a charge stop process, turns off the first switch circuit 46, and returns to step S01.

  In step S03, if the cell temperature of the electric double layer capacitor 43 monitored by the monitoring device 53 is equal to or higher than the maximum value, the process proceeds to step S04, and if it is lower than the maximum value, the process proceeds to step S05.

  In step S04, an output restriction process or a charge stop process is performed. Specifically, the control device 50 sends a signal to the resistor 49 to reduce the voltage or current supplied to the electric double layer capacitor 43. Alternatively, the charging is stopped by turning off the first switch circuit 46. Then, the process proceeds to step S06.

  In step S06, it is determined whether the cell temperature is equal to or higher than a dangerous value. If the cell temperature is equal to or higher than the dangerous value, the process proceeds to step S07. If the cell temperature is lower than the dangerous value, the process returns to step S01.

  In step S07, an output emergency stop process is performed to prevent failure of the electric double layer capacitor 43, and the process returns to step S01.

  In step S05, output restriction release processing is performed, and charging is resumed by charging processing in a state where there is no output restriction.

  Thus, the monitor device 53 monitors the electric power and temperature of the electric double layer capacitor 43 during charging, and when the voltage or temperature is equal to or higher than the maximum value, the control device 50 sends a signal to the resistor 49 to be supplied from the generator 41. The overvoltage of the electric double layer capacitor 43 is prevented by reducing the amount of electric power to be supplied or stopping the supply of electric power. For this reason, the life of the electric double layer capacitor 43 is extended.

-Operation of garbage loading device-
In order to perform the dust collection work, first, the control device 50 turns off the first switch circuit 46 and the third switch circuit 48 and turns on the second switch circuit 47. Then, electric power is supplied from the electric double layer capacitor 43, inverter control is performed by the control device 50, the electric motor 44 is rotated using the current, and the hydraulic pump 51 is rotated to operate the packer system 60.

  Hereinafter, the dust loading device 30 is controlled by the control device 50. As shown in FIG. 6, in a state where both the sliding cylinder 13 and the swing cylinder 14 are extended and the sliding plate 10 is in the rising end position (the uppermost position), the dust 55 is put into the dust charging box 6 through the charging port 7. When the start switch (not shown) is turned on, the hydraulic pump 51 is driven to supply hydraulic pressure, and the loading operation is started. 6 to 9, the sliding cylinder 13 is omitted for simplification.

  First, in the state shown in FIG. 6, the oscillating cylinder 14 is retracted and the compression plate 15 is reversely operated to reach the reverse end position (see FIG. 7) (reverse process). Thereafter, the sliding cylinder 13 is retracted and the sliding plate 10 is lowered, and the compression plate 15 is shifted to the lowering process.

  Next, when the compression plate 15 reaches the lowering end position (see FIG. 8), the swing cylinder 14 is extended to swing the compression plate 15 forward, and the process proceeds to the compression step.

  Then, when the compression plate 15 swings to the foremost position (see FIG. 9), the sliding cylinder 13 is extended to raise the compression plate 15 to shift to the ascending step, and the compression plate 15 is brought to the ascent end position. When it reaches (see FIG. 6), the series of loading operations is terminated.

  Thereby, the dust loading operation | movement which made each cycle of inversion, descent | fall, compression, and a raise 1 cycle can be performed repeatedly.

  Further, when loading the dust 55 into the dust container 3, the discharge plate 17 in the dust container 3 is disposed at the rearmost position, and the dust 55 loaded by the dust loading device 30 is the discharge plate. When the force that presses 17 reaches a predetermined value or more, the discharge cylinder 16 is gradually retracted as it is retracted. The dust 55 can be loaded while being compressed by the movement operation of the discharge plate 17.

  And when the dust 55 is loaded in this way and the dust container 3 becomes full, the operation of discharging the dust 55 is started. That is, after the garbage collection vehicle 1 is moved to a garbage disposal site or the like, electric power is supplied from the electric double layer capacitor 43 according to an instruction from the control device 50, and the electric motor 44 is rotated to rotate the hydraulic pump 51. With this hydraulic pressure, the rotating cylinder 9 is extended, the dust input box 6 is rotated upward about the input box support pin 5 to open the rear part of the dust container 3, and then the discharge cylinder 16 is extended. Then, by moving the discharge plate 17 located at the front part of the dust container 3 to the rear, the dust 55 accommodated in the dust container 3 is discharged.

  When collecting the dust 55, the packer system 60 is driven using the electric power stored in the electric double layer capacitor 43 by driving the engine 40 while the vehicle body 2 is traveling. Work is done. For this reason, noise is reduced and exhaust gas is not discharged without using external power.

  In addition, when the electric double layer capacitor 43 is abnormal, such as when the electric energy stored in the electric double layer capacitor 43 is insufficient in the collection operation of the dust 55, the control device 50 turns off the first switch circuit 46 as an emergency means. Then, the third switch circuit 48 is turned on, the engine 40 is driven again, and the electric power of the generator 41 is sent directly to the electric motor 44 via the emergency path 45. For this reason, the collection operation is not interrupted.

-Effect of the embodiment-
Therefore, according to the garbage truck 1 according to the present embodiment, the external power is used by stopping the engine 40 and driving the packer system 60 using the electric energy stored in the electric double layer capacitor 43. Therefore, it is suitable for collection work at night or in the basement of the building.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the said embodiment, although the electrical storage apparatus was the electric double layer capacitor 43, it is good also as a lithium ion battery. Lithium ion batteries are lightweight and compact, can charge and discharge large currents, and are efficient. Further, the power storage device may be a nickel metal hydride battery. Although the efficiency is lower than that of a nickel metal hydride battery or a lithium ion battery, it is relatively inexpensive and highly reliable. Furthermore, the power storage device may be a lead battery. Lead batteries are easy to maintain, easy to control overvoltage during charging, extremely reliable, inexpensive and easy to obtain.

  In the above embodiment, the charge regulator is the resistor 49, but the present invention is not limited to this, and the charge regulator may adjust the voltage or current in accordance with the characteristics of the power storage device.

  Although not shown, the dust container 3 may be configured to be tiltable (can be dumped) about the tilting shaft at the rear of the vehicle body 2 by expanding and contracting a tilting cylinder provided in the vehicle body 2.

  In the above embodiment, the compression-type dust loading device 30 is provided, but the present invention can also be applied to a rotary plate-type dust loading device.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

It is a side view of the garbage truck concerning the embodiment of the present invention. It is the sectional side view which expanded the rear part of the refuse collection vehicle and was seen from the side. It is a side view which expands and shows the sliding cylinder and its periphery in a dust input box. It is a block diagram which shows the power system of a garbage truck. It is a flowchart which shows the monitoring function by a monitor apparatus. It is the schematic explaining the raising end position of a refuse loading apparatus. It is the schematic explaining the inversion end position of a refuse loading apparatus. It is the schematic explaining the descent | fall end position of a refuse loading apparatus. It is the schematic explaining the state of the foremost position of a refuse loading apparatus.

1 Garbage Collection Vehicle 40 Engine 41 Generator 42 Charging Path 43 Electric Double Layer Capacitor (Power Storage Device)
44 Electric motor 45 Emergency path
49 resistors (charging regulator)
50 Control Device 51 Hydraulic Pump 53 Monitor Device 55 Dust 60 Packer System

Claims (1)

In a refuse collection vehicle comprising an engine, a packer system for collecting and discharging dust, and a hydraulic pump for supplying energy for driving the packer system,
A generator driven by the engine;
A power storage device for storing the power of the generator;
An electric motor for driving the hydraulic pump;
A control device that controls the packer system and supplies the electric motor with electric power from the power storage device when the engine is stopped;
A charging path for sending the power of the generator to the power storage device;
An emergency path for sending the power of the generator to the electric motor without going through the power storage device,
The charging path is provided with a first switch circuit, a charge regulator that adjusts power from the generator and sends the power to the power storage device, and the power storage device. A two-switch circuit is provided and connected to the control device;
A third switch circuit is connected to the emergency path, and is directly connected to the control device.
The control means is configured to be automatically switchable between the charging path and the emergency path by the first, second and third switch circuits, and when there is an abnormality in the power storage device, A garbage collection vehicle configured to send electric power of the generator to the electric motor .

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