JP2005041647A - Refuse collecting vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refuse collecting vehicle having simple construction for reducing noises and exhaust gas generated during loading refuse and saving fuel during driving a travel engine. <P>SOLUTION: The refuse collecting vehicle 1 comprises a refuse loading device for loading the refuse into a packing case mounted on a body, a hydraulic pump 40 for supplying pressure oil to hydraulic equipment which drives the refuse loading device, the travel engine 10, and a PTO device 30 for picking up part of the power of the travel engine 10 when driving the hydraulic pump 40. The refuse collecting vehicle has a pressure switch 54 for detecting a value for load on the refuse loading device, an electric motor 20 connected directly to the travel engine 10, and a motor control means for operating the electric motor 10 when the value for the load detected by the pressure switch 54 exceeds a preset value. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a garbage truck.

  A conventional garbage truck has a cargo box mounted on the vehicle body, and a tailgate having a built-in dust loading device is connected to the rear of the cargo box. Such a dust loading device includes a scraping plate that can be rotated by a hydraulic motor, and a pushing plate that can swing in the longitudinal direction of the vehicle body by expansion and contraction of a hydraulic cylinder. In addition, the dust collection vehicle is provided with a dust discharge plate that can move back and forth in the cargo box by expansion and contraction of the hydraulic cylinder.

  The hydraulic motor that drives the dust loading device and the dust discharge plate and the hydraulic pump 100 that supplies the hydraulic oil to the hydraulic cylinder are driven by a part of the power of the traveling engine 120 taken out by the PTO device 110. It is common (see FIG. 6).

  As described above, when a part of the power of the traveling engine 120 is used as the driving force of the dust loading device or the like, the dust is loaded or discharged while the traveling engine 120 is operated. A relatively large hydraulic pressure is required when dust is scraped into the packing box of the apparatus, or when dust is pushed into the packing box with the pushing plate. For this reason, conventionally, an engine speed increasing device 130 for controlling the rotation of the traveling engine 120 is provided, and the rotational speed of the traveling engine 120 in the idling state is increased at a predetermined timing, so that a relatively large hydraulic pressure is generated. It was generated.

  However, when the technique as described above is employed, it is necessary to increase the rotational speed of the traveling engine 120 at a predetermined timing when the dust is loaded. For this reason, there are problems that noise and exhaust gas increase and environmental problems occur, and that a large amount of fuel for driving the driving engine is consumed.

For this reason, in recent years, an electric motor driven by an in-vehicle battery and a second hydraulic pump driven by the electric motor are provided, and the electric motor is operated at a predetermined timing, whereby a relatively large hydraulic pressure is obtained. There has been proposed a technique for generating (see, for example, Patent Document 1). In addition, in the refuse collection vehicle described in Patent Document 1, when the dust is loaded into the dust loading device or the packing box is fully loaded and a larger hydraulic pressure is required, the engine speed increases. The required oil pressure is generated by increasing the number of revolutions of the traveling engine.
Japanese Patent Laid-Open No. 2000-44005 (page 3, FIG. 1)

  However, when the technique described in Patent Document 1 is adopted, the first hydraulic pump is driven by the PTO device and at the same time the second hydraulic pump is driven by the electric motor. Therefore, a large-capacity on-board battery for driving the electric motor, Additional parts such as a second hydraulic pump are required.

  In the technique described in Patent Document 1, the engine speed increasing device is operated when dust is stuck in the dust loading device or when the packing box is fully loaded. Problems still arise and the problem of wasting fuel has not been solved.

  SUMMARY OF THE INVENTION An object of the present invention is to reduce a noise and exhaust gas generated at the time of loading dust and the like, and to reduce fuel for driving an engine for traveling, and to provide a garbage collection vehicle having a relatively simple configuration. Is to provide.

  In order to solve the above problems, the invention described in claim 1 is directed to a dust loading device for loading dust in a cargo box mounted on a vehicle body, and a hydraulic oil for driving the dust loading device. And a PTO device that takes out a part of the power of the traveling engine and drives the hydraulic pump, and uses the part of the power of the traveling engine. In a garbage collection vehicle for driving a dust loading device, load detection means for detecting a load value acting on the dust loading device, an electric motor directly connected to the traveling engine, and the load detection means are detected. Motor control means for operating the electric motor when the load value exceeds a predetermined value.

  According to the first aspect of the present invention, when the dust is caught in the dust loading device and the load acting on the dust loading device exceeds a predetermined value, the motor control means The electric motor power can be added to the driving engine power by operating the motor.

  Therefore, it is possible to generate a large hydraulic pressure using the power of the electric motor as an auxiliary power while maintaining the traveling engine in an idling state (or a low rotation state close to the idling state), and loading dust against a large load. The device can be driven. As a result, it is possible to reduce noise and exhaust gas during loading of dust, and to save fuel for driving the driving engine.

  Further, since the electric motor is directly connected to the traveling engine, the power of the electric motor can be transmitted to the hydraulic pump via the PTO device, so that no additional parts such as a second hydraulic pump are required. As a result, a relatively simple configuration can be obtained.

  According to a second aspect of the present invention, in the refuse collection vehicle according to the first aspect, the motor control means generates a motor when a load value detected by the load detection means exceeds a predetermined value. The electric motor is operated by a drive signal.

  According to a third aspect of the present invention, there is provided a dust loading device for loading dust in a cargo box mounted on a vehicle body, a hydraulic pump for driving the dust loading device, a traveling engine, and the traveling engine. An electric motor connected via an intermittent connection means, and a PTO device for taking out part of the power of the traveling engine and / or the electric motor and driving the hydraulic pump, In a garbage collection vehicle that uses power to drive the dust loading device, a load detection means for detecting a load acting on the dust loading device, and a value of the load detected by the load detection means are predetermined. And a connection control means for connecting the traveling engine to the electric motor when the value exceeds.

  According to the third aspect of the present invention, when the dust is stuck in the dust loading device and the value of the load acting on the dust loading device exceeds a predetermined value, the connection control means travels. The driving engine can be connected to the electric motor to add the power of the traveling engine to the power of the electric motor.

  Therefore, a large hydraulic pressure can be generated by the power of the electric motor and the power of the traveling engine in the idling state (or the low rotation state close to the idling state). For this reason, it is possible to drive the dust loading device against a large load while maintaining the traveling engine in an idling state (or a low rotation state close to the idling state). As a result, it is possible to reduce noise and exhaust gas during loading of dust, and to save fuel for driving the driving engine.

  Further, since the electric motor is connected to the traveling engine via the connecting means, the power of the electric motor can be transmitted to the hydraulic pump via the PTO device, so that no additional parts such as a second hydraulic pump are required. Become. As a result, a relatively simple configuration can be obtained.

  According to a fourth aspect of the present invention, in the refuse collection vehicle according to the third aspect, the connection control means is a connection generated when a load value detected by the load detection means exceeds a predetermined value. The driving engine is connected to the electric motor by a driving signal.

  According to a fifth aspect of the present invention, in the refuse collection vehicle according to any one of the first to fourth aspects, the load detecting means has a pressure of pressure oil supplied to the hydraulic equipment exceeding a predetermined value. It is a pressure switch that operates in some cases.

  According to the present invention, there is provided control means for operating the electric motor (or connecting the traveling engine to the operating electric motor) when the value of the load acting on the dust loading device exceeds a predetermined value. Therefore, the dust loading device can be driven using the power of the traveling engine in the idling state and the power of the electric motor. As a result, it is possible to reduce noise and exhaust gas generated during loading of dust and the like, and to save fuel for driving the driving engine. Further, the configuration of the garbage truck can be made relatively simple.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, the refuse collection vehicle demonstrated by each following embodiment is a hybrid vehicle provided with the engine 10 for driving | running | working and the electric motor 20. FIG.

  For this reason, when starting and accelerating, the vehicle travels using the power of the traveling engine 10 and the electric motor 20, and the electric motor 20 assists the traveling engine 10 when a large driving force (torque) is required ( Parallel mode: see FIG. Further, during normal traveling, the vehicle travels only with the power of the traveling engine 10 or with the power of the traveling engine 10 and the electric motor 20 (engine traveling mode: see FIG. 1B). On the other hand, during deceleration and braking, the electric motor 20 automatically generates power and charges the storage battery 22 (regenerative mode: see FIG. 1C). An image of the energy balance in these parallel mode, engine running mode and regenerative mode is shown in FIG.

[First embodiment]
First, the structure of the refuse collection vehicle 1 which concerns on the 1st Embodiment of this invention is demonstrated using FIGS. A garbage collection vehicle 1 according to the present embodiment moves back and forth in a tailgate 3 provided at a rear portion of a cargo box 2 mounted on a vehicle body, a dust loading device 4 built in the tailgate 3, and the cargo box 2. A dust discharge plate (not shown) is provided (see FIG. 2).

  The dust loading device 4 includes a scraping plate 5 that is rotated by a hydraulic motor 51 (see FIG. 4), and a pushing plate 7 that swings in the longitudinal direction of the vehicle body as the hydraulic cylinder 6 expands and contracts. In addition, the dust discharge plate is configured to move back and forth within the cargo box 2 by expansion and contraction of the hydraulic cylinder 61 (see FIG. 4). These hydraulic devices such as a hydraulic motor and a hydraulic cylinder are driven by pressure oil supplied from a hydraulic pump 40 described later.

  The garbage collection vehicle 1 includes a traveling engine 10 that generates traveling power, an electric motor 20 that generates auxiliary traveling power, a traveling engine 10, and a PTO that extracts a part of the power of the electric motor 20. Device 30, hydraulic pump 40 driven by the power extracted by PTO device 30, loading hydraulic circuit 50 driven by pressure oil supplied from hydraulic pump 40 to drive the hydraulic equipment of dust loading device 4, hydraulic pressure Controlling the operation of the discharge hydraulic circuit 60, which controls the operation of the loading hydraulic circuit 50, and the operation of the discharge hydraulic circuit 60, which are driven by the pressure oil supplied from the pump 40 to drive the hydraulic equipment of the dust discharge plate. A discharge electric circuit 80, a loading electric circuit 70, a motor drive signal generator 90 connected to the discharge electric circuit 80, and the like (see FIG. 3).

  The traveling engine 10 is driven by a predetermined fuel (gasoline or via), and is connected to a transmission 12 via a clutch 11. The power generated by the traveling engine 10 is transmitted to the driving tire 14 via the clutch 11, the transmission 12, and the differential gear 13 (see FIG. 3).

  The traveling engine 10 is connected to a generator 15 that generates power using the power of the traveling engine 10. The electric power generated by the generator 15 is stored in the battery 16 and is supplied to the PTO switch 31 via the fuse 17. For this reason, when the PTO switch 31 is turned on, the first self-holding relay 18 is activated and the first normally open relay contact 18a is closed, so that power is supplied to the main switch 19. Then, by operating the main switch 19 to the loading side or the discharging side, the loading electric circuit 70 or the discharging electric circuit 80 can be energized (see FIG. 3).

  The electric motor 20 is connected to the storage battery 22 via the inverter 21 and is driven by the electric power of the storage battery 22. Further, the electric motor 20 is directly connected to the rear of the traveling engine 10 while sharing a rotating shaft, and is connected to the transmission 12 via the clutch 11. For this reason, the motive power generated by the electric motor 20 is transmitted to the driving tire 14 via the clutch 11, the transmission 12, and the differential gear 13 (see FIG. 3).

  Further, energy (regenerative energy) generated by rotation of the tire 14 during deceleration and braking is transmitted to the electric motor 20 via the transmission 12 and the clutch 11. The electric motor 20 generates power using this regenerative energy. The electric power generated by the electric motor 20 is stored in the storage battery 22 via the inverter 21 (see FIG. 3).

  The PTO device 30 is connected to the transmission 12, extracts a part of the power of the traveling engine 10 and the electric motor 20, and drives the hydraulic pump 40 with the extracted power (see FIG. 3). The hydraulic pump 40 is driven by the power from the PTO device 30 to supply pressure oil to the loading hydraulic circuit 50 to drive the dust loading device 4 and to supply pressure oil to the discharge hydraulic circuit 60. The dust discharge plate is driven (see FIG. 3).

  The loading hydraulic circuit 50 includes a hydraulic motor 51 that rotationally drives the scraping plate 5 of the dust loading device 4, a motor control valve 52 that controls the operation of the hydraulic motor 51, and a pushing plate 7 of the dust loading device 4. And a cylinder control valve 53 that controls the operation of the hydraulic cylinder 6 that swings (see FIG. 4). The discharge hydraulic circuit 60 includes a hydraulic cylinder 61 that moves the dust discharge plate back and forth in the cargo box 2, and a cylinder control valve 62 that controls the operation of the hydraulic cylinder 61 (see FIG. 4). .

  At the most upstream position of the loading hydraulic circuit 50 (that is, the upstream position of the cylinder control valve 53), a pressure switch 54 that operates when the pressure in the circuit exceeds a predetermined value is provided. Yes. Here, the “predetermined value” means a loading hydraulic circuit when the dust G is caught in the dust loading device 4 or when the reaction force of the dust G against the scratching plate 5 or the pushing plate 7 becomes large. The pressure generated in the hydraulic pump 50 is set lower than the maximum value of the pressure oil pressure that can be supplied by the hydraulic pump 40. The pressure switch 54 is load detecting means in the present invention.

  Further, the pressure oil supplied from the hydraulic pump 40 is supplied to the loading hydraulic circuit 50 via the discharge hydraulic circuit 60 and then returns to the oil tank 41 (see FIGS. 3 and 4). . Also, a relief valve 42 is interposed between the pressure oil supply side flow path and the return side flow path, and the pressure in the loading hydraulic circuit 50 and the discharge hydraulic circuit 60 is set to a predetermined upper limit value. Is prevented (see FIG. 4).

  The pressure switch 54 has a normally open contact 54a. The normally open contact 54 a is provided together with the second self-holding relay 55 on the ground side of the loading electric circuit 70. A second normally open relay contact 55 a of the second self-holding relay 55 is interposed between the loading electric circuit 70 and the motor drive signal generation device 90.

  The loading electric circuit 70 is driven by electric power supplied from the generator 15 (or the battery 16), and controls the operation of the loading hydraulic circuit 50. The discharge electric circuit 80 is driven by the electric power supplied from the generator 15 (or the battery 16), and controls the operation of the discharge hydraulic circuit 60. The motor drive signal generation device 90 generates a command signal (hereinafter referred to as “motor drive signal”) for operating the electric motor 20 to generate power for assisting the traveling engine 10. The motor drive signal generated by the motor drive signal generation device 90 is transmitted to the electric motor 20.

  Next, the control operation at the time of the dust collection of the garbage truck 1 according to the present embodiment will be described.

  First, the garbage truck 1 is stopped at a predetermined position, the traveling engine 10 is set in an idling state, and an operator who starts the dust loading operation turns on the PTO switch 31. Then, a part of the power of the traveling engine 10 controlled to the idling state (or the low rotation state close to the idling state) is taken out by the PTO device 30 and the hydraulic pump 40 is driven. When the hydraulic pump 40 is driven, pressure oil is supplied to the loading hydraulic circuit 50 via the discharge hydraulic circuit 60.

  Further, when the operator who starts the dust loading operation turns on the PTO switch 31, the first self-holding relay 18 is activated, the first normally open relay contact 18 a is closed, and the main switch 19 is energized. When the operator operates the main switch 19 to the loading side, the loading electric circuit 70 is energized. When the operator operates a start button (not shown) connected to the energized loading electrical circuit 70, the loading hydraulic circuit 50 starts to be controlled. As a result, the dust loading device 4 loads dust in the following cycle.

  First, the scraping plate 5 and the pushing plate 7 are positioned on the cargo box 2 side in order to put the dust G into the tailgate 3 (see FIG. 2A). Then, after throwing the dust G into the tailgate 3, the dust plate G is scraped into the cargo box 2 side by rotating the scraping plate 5 in the direction of arrow A (see FIGS. 2B and 2C). . At this time, since the pushing plate 7 is swung in the direction of the arrow B and gradually separated from the packing box 2, the dust G scraped into the pushing plate 5 can be put into the packing box 2. Then, when the scoring plate 5 that has scraped the dust G reaches a substantially horizontal state toward the packing box 2 side, the pressing plate 7 is swung in the direction of arrow C toward the packing box 2 side. Then, the dust G on the scratching plate 5 is pushed into the packing box 2 (see FIGS. 2D and 2E).

  At the time of such dust loading, dust G is bitten into the dust loading device 4, or the scraping plate 5 or the like due to the scraping or pushing of the dust G (see FIG. 2 (c) to (e)) When the reaction force of the dust G against the pushing plate 7 becomes large and the value of the load acting on the dust loading device 4 exceeds a predetermined value, the pressure switch 54 is activated. When the pressure switch 54 is activated, the normally open contact 54 a is closed and the second self-holding relay 55 is energized. When the second self-holding relay 55 is energized and activated, the second normally open relay contact 55a is closed and the motor drive signal generator 90 is energized.

  Then, the energized motor drive signal generation device 90 generates a motor drive signal. The motor drive signal generated by the motor drive signal generation device 90 is transmitted to the electric motor 20. The electric motor 20 that has received this motor drive signal is operated by the electric power of the storage battery 22 to generate auxiliary power for assisting the traveling engine 10. Thereby, since the power of the electric motor 20 is added to the power of the traveling engine 10, a driving force (oil pressure) that can resist the load acting on the dust loading device 4 via the PTO device 30 and the hydraulic pump 40. ) Can be generated. That is, the second self-holding relay 55, the second normally open relay contact 55a, and the motor drive signal generation device 90 constitute a motor control means in the present invention.

  In the refuse collection vehicle 1 according to the embodiment described above, when the dust G is caught in the dust loading device 4 and the value of the load acting on the dust loading device 4 exceeds a predetermined value. In addition, the electric motor 20 can be operated by the motor control means to add the power of the electric motor 20 to the power of the traveling engine 10.

  Accordingly, a large hydraulic pressure can be generated by using the power of the electric motor 20 as auxiliary power while maintaining the traveling engine 10 in the idling state (or in a low rotation state close to the idling state), and the dust is resisted against a large load. The loading device 4 can be driven. As a result, noise and exhaust gas at the time of loading dust can be reduced, and fuel for driving the traveling engine 10 can be saved.

  Further, since the electric motor 20 is directly connected to the traveling engine 10, the power of the electric motor 20 can be transmitted to the hydraulic pump 40 via the PTO device 30, so that additional components such as the second hydraulic pump 40 are provided. It becomes unnecessary. As a result, a relatively simple configuration can be obtained.

[Second Embodiment]
Then, the structure of the garbage truck 1A which concerns on the 2nd Embodiment of this invention is demonstrated using FIG. The garbage collection vehicle 1A according to the present embodiment has a configuration in which the traveling engine 10 and the motor 20 of the garbage collection vehicle 1 according to the first embodiment can be connected and separated, and a “motor drive signal generation device”. 90 ”is changed to“ linked drive signal generation device 90A ”, and the other configuration is substantially the same as the configuration of the garbage truck 1. Therefore, the description of the substantially same configuration as the garbage truck 1 will be omitted. In addition, when substantially the same configuration as the garbage truck 1 is used in the following description, the same reference numerals as those in the first embodiment are given.

  The garbage truck 1A according to the present embodiment includes a second clutch 11A as a connecting means between the traveling engine 10 and the electric motor 20 (see FIG. 5). The second clutch 11A is driven by a clutch driving device (not shown). During traveling, the second clutch 11A is in a connected state, the traveling engine 10 and the electric motor 20 are coupled, and the power of the traveling engine 10 is transmitted to the tire 14 via the transmission 12 or the like. On the other hand, when the vehicle is stopped (during idling), the second clutch 11A is disengaged so that the traveling engine 10 and the electric motor 20 are separated, and the hydraulic pump 40 is driven only by the power of the electric motor 20. It has become.

  Further, the garbage truck 1A according to the present embodiment includes a connected drive signal generator 90A connected to the loading electric circuit 70 and the discharging electric circuit 80 (see FIG. 5). The connection drive signal generation device 90A generates a signal (hereinafter referred to as “connection drive signal”) for connecting the traveling engine 10 to the electric motor 20 during idling. The connection drive signal generated by the connection drive signal generation device 90A is transmitted to the clutch drive device that drives the second clutch 11A. The clutch drive device that has received this connection drive signal drives the second clutch 11A to be in a connected state.

  Next, a description will be given of a control operation when the refuse collection vehicle 1A according to this embodiment is loaded with dust.

  First, the garbage truck 1A is stopped at a predetermined position, the traveling engine 10 is set in an idling state, and an operator who starts the dust loading operation turns on the PTO switch 31. Then, a part of the power of the electric motor 20 is taken out by the PTO device 30, and the hydraulic pump 40 is driven. When the hydraulic pump 40 is driven, pressure oil is supplied to the loading hydraulic circuit 50 via the discharge hydraulic circuit 60.

  Further, when the operator who starts the dust loading operation turns on the PTO switch 31, the first self-holding relay 18 is activated, the first normally open relay contact 18 a is closed, and the main switch 19 is energized. When the operator operates the main switch 19 to the loading side, the loading electric circuit 70 is energized. When the operator operates a start button (not shown) connected to the energized loading electrical circuit 70, the loading hydraulic circuit 60 starts to be controlled. As a result, the dust loading device 4 loads dust in a predetermined cycle (see FIG. 2).

  At the time of such dust loading, dust G is bitten into the dust loading device 4, or the scraping plate 5 or the like due to the scraping or pushing of the dust G (see FIG. 2 (c) to (e)) When the reaction force of the dust G against the pushing plate 7 becomes large and the value of the load acting on the dust loading device 4 exceeds a predetermined value, the pressure switch 54 is activated. When the pressure switch 54 is activated, the normally open contact 54 a is closed and the second self-holding relay 55 is energized. When the second self-holding relay 55 is energized and activated, the second normally open relay contact 55a is closed and the coupled drive signal generator 90A is energized.

  Then, the connected drive signal generator 90 that is energized generates a connected drive signal. The connection drive signal generated by the connection drive signal generation device 90A is transmitted to the clutch drive device. Upon receipt of this connection drive signal, the clutch drive device drives the second clutch 11A to be in the connected state, and connects the traveling engine 10 controlled to the idling state (or the low rotation state close to the idling state) to the electric motor 20. To do. As a result, the power of the traveling engine 10 is added to the power of the electric motor 20, so that the driving force (oil pressure) that can resist the load acting on the dust loading device 4 via the PTO device 30 and the hydraulic pump 40. ) Can be generated. That is, the second self-holding relay 55, the second normally open relay contact 55a, the connection drive signal generation device 90A, and the clutch drive device constitute connection control means in the present invention.

  In the garbage truck 1A according to the embodiment described above, when the dust G is bitten into the dust loading device 4 and the value of the load acting on the dust loading device 4 exceeds a predetermined value. In addition, the driving engine 10 can be connected to the electric motor 20 by the connection control means, and the power of the driving engine 10 can be added to the power of the electric motor 20.

  Therefore, a large hydraulic pressure can be generated by the power of the electric motor 20 and the power of the traveling engine 10 in the idling state (or in the low rotation state close to the idling state). For this reason, the dust loading device 4 can be driven against a large load while maintaining the traveling engine 10 in the idling state (or in a low rotation state close to the idling state). As a result, noise and exhaust gas at the time of loading dust can be reduced, and fuel for driving the traveling engine 10 can be saved.

  Further, since the electric motor 20 is connected to the traveling engine 10 via the second clutch 11A, the power of the electric motor 20 can be transmitted to the hydraulic pump 40 via the PTO device 30, so that the second hydraulic pump No additional parts such as are required. As a result, a relatively simple configuration can be obtained.

It is explanatory drawing for demonstrating the driving mode of the garbage truck which concerns on each embodiment of this invention. It is explanatory drawing for demonstrating the refuse loading apparatus of the garbage truck which concerns on the 1st Embodiment of this invention. It is explanatory drawing for demonstrating the structure of the drive system of the garbage truck which concerns on the 1st Embodiment of this invention. FIG. 4 is a circuit diagram of a loading hydraulic circuit and a discharging hydraulic circuit shown in FIG. 3. It is explanatory drawing for demonstrating the structure of the drive system of the garbage truck which concerns on the 2nd Embodiment of this invention. It is explanatory drawing for demonstrating the structure of the drive system of the conventional refuse collection vehicle.

Explanation of symbols

1, 1A Garbage truck 2 Cargo box 4 Garbage loading device 6 Hydraulic cylinder (hydraulic equipment)
10 traveling engine 11A second clutch (coupling means)
20 Electric motor 30 PTO device 40 Hydraulic pump 51 Hydraulic motor (hydraulic equipment)
54 Pressure switch (load detection means)
55 Second self-holding relay (motor control means, connection control means)
55a Second normally open relay contact (motor control means, connection control means)
61 Hydraulic cylinder (hydraulic equipment)
90 Motor drive signal generator (motor control means)
90A connection drive signal generation device (connection control means)
G garbage

Claims (5)

A dust loading device for loading dust into a cargo box mounted on a vehicle body, a hydraulic pump for supplying pressure oil to hydraulic equipment that drives the dust loading device, a traveling engine, and power of the traveling engine A waste collection vehicle that takes out a part of the PTO device that drives the hydraulic pump, and drives the dust loading device using a part of the power of the traveling engine,
Load detecting means for detecting a load value acting on the dust loading device;
An electric motor directly connected to the traveling engine;
Motor control means for operating the electric motor when a load value detected by the load detection means exceeds a predetermined value;
A garbage collection vehicle comprising: The motor control means includes
2. The garbage collection vehicle according to claim 1, wherein the electric motor is operated by a motor drive signal generated when a load value detected by the load detection unit exceeds a predetermined value. Connected via a dust loading device for loading dust in a cargo box mounted on the vehicle body, a hydraulic pump for driving the dust loading device, a traveling engine, and a connecting means that can be intermittently connected to the traveling engine. An electric motor, and a PTO device that takes out a part of the power of the traveling engine and / or the electric motor and drives the hydraulic pump, and uses the power of the electric motor to load the dust loading device. In the garbage truck that drives
Load detecting means for detecting the magnitude of the load acting on the dust loading device;
Connection control means for connecting the traveling engine to the electric motor when a load value detected by the load detection means exceeds a predetermined value;
A garbage collection vehicle comprising: The connection control means includes
4. The travel engine is connected to the electric motor by a connection drive signal generated when a load value detected by the load detection unit exceeds a predetermined value. Garbage truck. The load detecting means includes
The refuse collection vehicle according to any one of claims 1 to 4, wherein the refuse collection vehicle is a pressure switch that operates when a pressure of pressure oil supplied to the hydraulic equipment exceeds a predetermined value.

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