WO2013008331A1

WO2013008331A1 - Refuse collection vehicle

Info

Publication number: WO2013008331A1
Application number: PCT/JP2011/066073
Authority: WO
Inventors: 雅明寿美田; 晃一巻幡; 嘉宏長尾
Original assignee: 新明和工業株式会社
Priority date: 2011-07-14
Filing date: 2011-07-14
Publication date: 2013-01-17

Abstract

The purpose of the present invention is to reduce noise of a refuse collection vehicle by a simple method, the noise occurring at the time of change to each operation of the refuse collection vehicle. A refuse collection vehicle has: a refuse loading device (20) which is provided to a refuse input box and which is driven by both a sliding cylinder (26) and a pivoting cylinder (28); a swash plate variable displacement hydraulic pump (61) which supplies working oil for operating the sliding cylinder (26) and pivoting cylinder (28) of the refuse loading device (20) and which is configured so that the discharge flow rate of the hydraulic pump (61) is changed by tilting the swash plate; a pump control cylinder (74) which is driven by the working oil and which is extended and retracted to adjust the tilt of the hydraulic pump (61); and a solenoid control valve (64) which controls the flow of the working oil for operating the pump control cylinder (74).

Description

Garbage truck

The present invention relates to a dust collection vehicle provided with a dust loading device operated using hydraulic oil supplied by a hydraulic pump.

Conventionally, there is known an electric dust collection vehicle that drives a dust loading device with electric power supplied from a storage battery in order to prevent generation of noise and exhaust gas (see, for example, Patent Document 1). In this electric dust collection vehicle, the dust loading device is driven by the electric power from the storage battery stored in the storage box, and the engine is stopped during work to prevent the generation of noise and exhaust gas.

JP 2005-170580 A

However, in the conventional electric dust collection vehicle, the electric motor is driven to discharge the hydraulic oil from the hydraulic pump and the dust loading device is driven, but only a constant flow of hydraulic oil is supplied from this hydraulic pump. Therefore, when the load on the dust loading device increases, the hydraulic pressure of the hydraulic oil supplied to the hydraulic actuator of the dust loading device suddenly rises, causing problems such as the electric motor stopping. In addition, it is conceivable to enlarge the electric motor in advance in anticipation of this hydraulic pressure rise, but this becomes a problem from the viewpoint of noise, space saving, and energy saving.

Therefore, in the present invention, it is an object of the present invention to provide a dust collection vehicle that reduces noise and enables downsizing of an electric motor or the like even if the hydraulic pressure changes during operation of the dust loading device.

The dust collection vehicle according to the present invention is mounted on a vehicle body and has a waste storage box having a rear opening, and a waste input box continuously connected to the rear opening of the waste storage box and having a rear insertion opening, A dust loading device provided in a box and driven by a hydraulic actuator, and a hydraulic pump supplying hydraulic fluid for operating the hydraulic actuator of the dust loading device, and a swash plate type in which a swash plate is tilted to change the discharge flow rate A hydraulic pump of variable displacement type and a pump control cylinder driven by hydraulic fluid, which controls the flow of hydraulic fluid that operates the pump control cylinder, which adjusts the inclination of the swash plate of the hydraulic pump by expansion and contraction An electromagnetic control valve and a control device for controlling the electromagnetic control valve.

According to the dust collection vehicle of the present invention, even if the hydraulic pressure changes during operation of the hydraulic actuator of the dust loading device operated by the hydraulic fluid supplied by the hydraulic pump, the flow of hydraulic fluid operating the pump control cylinder The expansion and contraction of the pump control cylinder is switched by controlling by the electromagnetic control valve controlled by the control device, and the inclination of the swash plate of the swash plate type variable displacement hydraulic pump is steplessly changed by the expansion and contraction. The discharge flow rate of the pump can be optimally controlled.

Here, the hydraulic actuator is a hydraulic cylinder, and the solenoid control valve steplessly increases the discharge flow rate of the hydraulic pump to a set amount at the start of the expansion operation of the hydraulic cylinder, and the hydraulic pump at the end of the expansion operation of the hydraulic cylinder It is desirable to control the flow of hydraulic fluid that operates the pump control cylinder so as to steplessly reduce the discharge flow rate from the set amount. As a result, it is possible to eliminate sudden changes in the flow rate at the start and end of the extension operation of the hydraulic cylinder of the dust loading device.

Preferably, the hydraulic actuator is a hydraulic cylinder, and the solenoid control valve regulates the extension / contraction speed of the hydraulic cylinder by controlling the flow of hydraulic fluid for operating the pump control cylinder. Thereby, the expansion-contraction speed of the hydraulic cylinder of a refuse loading apparatus can be easily adjusted to optimal speed.

Further, in the dust collection vehicle according to the present invention, the dust loading device comprises: a sliding plate movable in the vertical direction by the expansion and contraction operation of the sliding cylinder as the hydraulic actuator; It has a compression plate that can be rocked in the longitudinal direction of the vehicle body by the expansion and contraction operation of the dynamic cylinder, and the slide and compression plates operate as one cycle with inversion, descent, compression and elevation by the expansion and contraction operation of the sliding cylinder and rocking cylinder. By loading the waste into the waste storage box through the rear insertion port, the waste is loaded into the waste storage box.

Further, in the dust collection vehicle of the present invention, the dust loading device includes a pressing plate whose middle portion is pivotally supported by the side wall surface of the dust loading box and swings one end in the front and rear direction, and a rod at the other end of the pressing plate A pressing cylinder as a hydraulic actuator that is rotatably supported at its tip to operate the pressing plate, a rotary plate that can be rotated below the pressing plate with a base end as a fulcrum, and connected via a reduction gear to the base end of the rotary plate And a hydraulic motor as a hydraulic actuator for rotating the rotary plate, and by cooperative operation of the pushing plate and the rotary plate, the dust introduced into the dust input box through the rear insertion port is compressed and dust is collected from the rear opening It is to be loaded into the storage box.

(1) A hydraulic pump that supplies hydraulic fluid to operate the hydraulic actuator of the dust loading device, which is driven by the hydraulic fluid with a swash plate type variable displacement hydraulic pump that tilts the swash plate to change the discharge flow rate A pump control cylinder that adjusts the inclination of a swash plate of a hydraulic pump by expansion and contraction; an electromagnetic control valve that controls the flow of hydraulic fluid that operates the pump control cylinder; and a control device that controls the electromagnetic control valve Thus, the discharge flow rate of the hydraulic pump can be optimally controlled. As a result, even if the hydraulic pressure changes during operation of the hydraulic actuator of the dust loading device operated by the hydraulic fluid supplied by the hydraulic pump, the discharge flow rate of the hydraulic fluid of the hydraulic pump is optimally controlled. The electric motor connected to the hydraulic pump and the engine connected via the PTO will not be overloaded, nor will they stop.

(2) When the hydraulic actuator is a hydraulic cylinder and the solenoid control valve starts the expansion and contraction operation of the hydraulic cylinder, the discharge flow rate of the hydraulic pump is steplessly increased to a set amount, and when the expansion and contraction operation of the hydraulic cylinder is completed By controlling the flow of hydraulic fluid that operates the pump control cylinder so as to reduce the flow rate steplessly from the set amount, the start and end of the expansion and contraction operation of the hydraulic cylinder of the dust loading device can be abrupt Changes in the flow rate can be eliminated, and noises at the start and end of the extension operation of the hydraulic cylinder can be alleviated.

(3) Since the hydraulic actuator is a hydraulic cylinder, and the solenoid control valve controls the flow of hydraulic fluid that operates the pump control cylinder, the expansion and contraction speed of the hydraulic cylinder is adjusted, so that It is possible to easily adjust the expansion and contraction speed of the hydraulic cylinder to an optimum speed.

It is a side view of the electric garbage collection car in a 1st embodiment of the present invention. It is a rear enlarged view of the electrically-driven refuse collection vehicle of FIG. FIG. 3 is an enlarged view of a sliding cylinder and its periphery in the dust input box of FIG. 2; It is a schematic diagram explaining the rise end position of a dust loading device. It is a schematic diagram explaining the reversal end position of a dust loading device. It is the schematic explaining the fall end position of a dust loading device. It is the schematic explaining the state of the frontmost position of a dust loading apparatus. It is sectional drawing which shows an electrical component storage box and its periphery. It is a block diagram which shows the drive system of an electrically-driven refuse collection vehicle. FIG. 2 is a hydraulic circuit diagram of an electric dust collection vehicle. It is a block diagram which shows the relationship between each switch and each electromagnetic solenoid. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 1st Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 1st Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 1st Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 1st Embodiment of this invention. It is a figure which shows the relationship between the pressure of a hydraulic pump, and discharge flow volume. It is a figure which shows the change of the discharge flow volume of a hydraulic pump. It is a rear enlarged view of the electrically-driven refuse collection vehicle in 2nd Embodiment of this invention. It is a block diagram which shows the relationship between each switch and each electromagnetic solenoid. It is a hydraulic circuit diagram of the electrically-driven refuse collection vehicle in 2nd Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 2nd Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 2nd Embodiment of this invention. It is a flowchart which shows 1 process of operation | movement of the dust loading apparatus in 2nd Embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 electric dust collection vehicle 2a cab 3 dust storage box 4 back opening 5 dust insertion box 5a insertion box support pin 6 back insertion port 7 opening / closing door 8 turn table 9 rotation cylinder 20 dust loading device 22 sliding plate 26 slide Dynamic cylinder 27 Compression plate 28 Rocking cylinder 29 Discharge device 30 Discharge plate 34 Discharge cylinder 41 Up limit switch 42 Down limit switch 43 1st metal plate 45 Reverse limit switch 46 Compression limit switch 48 2nd metal plate 49 Operation switch 50 Electric components Containment box 51 Electric double layer capacitor 52 Inverter 53 Electric motor 59 Generator 60 Control device 61 Hydraulic pump 64 Solenoid control valve 70

Hydraulic equipment

72, 102 Control valve 74 Pump control cylinder 80 Electric dust collection car 81 Dust loading device 82 Push plate 83 Push cylinder 84 Rotary plate 85 Hydraulic motor 85a Reducer 86 Return limit switch 87 Push limit switch 88 1st metal plate 89 Rotation limit switch 91 2nd metal plate 100 Hydraulic equipment

Embodiment 1
FIG. 1 is a side view of the motorized refuse collection vehicle according to the first embodiment of the present invention, FIG. 2 is an enlarged rear view of the motorized refuse collection vehicle of FIG. FIG.

In FIG. 1, an electric dust collection vehicle 1 as a compression type dust collection vehicle according to a first embodiment of the present invention has a dust storage box 3 mounted on a vehicle body 2. A cab 2 a is provided in front of the vehicle body 2. At the rear opening 4 of the dust storage box 3, a dust input box 5 supported by the input box support pin 5a above is provided. The dust input box 5 is configured to be tiltable around the input box support pin 5a by a rotating cylinder 9, which is a hydraulic cylinder as a hydraulic actuator provided between the dust storage box 3 and the dust input box 5. ing.

As shown in FIG. 2, a substantially rectangular rear input port 6 is opened at the rear of the dust input box 5. Further, the dust input box 5 is provided with an open / close door 7 for opening and closing the dust input port 6. The open / close door 7 is slidable up and down, and by moving the dust inlet 6 upward, the dust inlet 6 can be opened. Further, at the lower part of the dust inlet 6, a turntable 8 as a dust guide plate for guiding the dust to the dust inlet 6 is rotatably provided.

Further, inside the dust input box 5, a compression type dust loading device 20 is equipped. The dust loading device 20 is for compressing the dust D introduced into the dust input box 5 through the rear insertion port 6 and loading the dust into the dust storage box 3.

Further, as shown in FIG. 2 and FIG. 3, guide groove members 21 are also laid on the both side walls of the dust input box 5 from the front upper portion toward the rear lower portion while also serving as a reinforcing frame. A slide plate 22 which spreads to the full width of the waste container 5 is accommodated in the dust input box 5. Guide rollers 23 are rotatably provided above and below the left and right side edges of the sliding plate 22. The guide rollers 23 are slidably fitted along the inner wall of the guide groove member 21.

A sliding plate support shaft 25 is inserted through the bosses 24 at the left and right end portions of the upper rear surface of the sliding plate 22. The sliding plate support shaft 25 projects outside the inside of the dust input box 5 beyond the sliding opening 5b formed in the side wall of the dust input box 5 in accordance with the sliding distance of the sliding plate 22. It is arranged as.

Further, between the lower portions of the sliding plate support shaft 25 and the lower portion of the dust input box 5 protruding outward from the left and right side walls of the dust input box 5 respectively, in the inclination direction of the guide groove member 21 outside the dust input box 5 Sliding cylinders 26 as hydraulic actuators provided along with each other are connected. The sliding cylinder 26 is a hydraulic cylinder operated hydraulically, and includes a rod-like cylinder rod 26 a and a cylindrical cylinder tube 26 b attached to the side wall of the dust input box 5. The sliding plate 22 reciprocates up and down along the guide groove member 21 by the expansion and contraction operation of the sliding cylinder 26. As shown in FIG. 1, side covers 5c are provided detachably on the left and right side walls of the dust input box 5, and the sliding cylinder 26 is provided between the side wall and the side covers 5c. ing.

Further, at the lower end of the sliding plate 22, a compression plate 27 which spreads to the full width of the dust input box 5 is supported swingably back and forth. The front end of the compression plate 27 is slightly bent forward. Further, on the left and right rear surfaces of the compression plate 27, connecting portions 27a are provided in a protruding manner. A swing cylinder 28 as a hydraulic actuator is connected between the left and right connection portions 27 a and the left and right end portions of the slide plate support shaft 25 provided on the upper surface of the back surface of the slide plate 22. The rocking cylinder 28 is a hydraulic cylinder operated by hydraulic pressure, and the compression plate 27 is rocked back and forth by the expansion and contraction operation of the rocking cylinder 28.

With this configuration, in the dust loading device 20, first, in the state shown in FIG. 4, the rocking cylinder 28 is degenerated and the compression plate 27 is reversed to reach the reverse end position (see FIG. 5) (reversed). Process). Thereafter, the sliding cylinder 26 is retracted to move the sliding plate 22 downward, and the compression plate 27 is lowered accordingly (lowering step). Then, when the compression plate 27 reaches the lowering end position (see FIG. 6), the rocking cylinder 28 is extended to rock the compression plate 27 forward to shift to the compression process. Then, when the compression plate 27 swings to the compression end position (see FIG. 7) (compression step), the sliding cylinder 26 is extended and the compression plate 27 is raised (raising step). When the compression plate 27 reaches the lift end position (see FIG. 4), a series of loading operations are finished. Thus, the dust loading operation is repeatedly performed with one cycle of reversing, lowering, compressing and rising, so that the dust D introduced into the dust input box 5 through the rear insertion port 6 is loaded into the dust storage box 3 ing.

Further, as shown in FIG. 2, the dust storage box 3 may be provided with a discharge device 29 for discharging the dust in the dust storage box 3. Specifically, the discharge plate 30 is disposed slidably in the front-rear direction in the dust storage box 3. The discharge plate 30 is a plate-like body formed in substantially the same size as the width and height of the dust storage box 3, and is supported by the support frame 31 sliding in the front-rear direction of the vehicle body 2 in the dust storage box 3. ing. At the left and right lower side edges of the support frame 31, a guide groove member 32 formed of a grooved steel for guiding the movement of the discharge plate 30 in the front-rear direction is provided. Guide convex members 33 constituting a guide portion together with the guide groove members 32 are extended in the front-rear direction of the vehicle body 2 on the left and right lower side surfaces of the dust storage box 3.

Further, a discharge cylinder 34 as a hydraulic actuator that moves the discharge plate 30 in the front-rear direction of the vehicle body 2 by the expansion and contraction operation is provided in the dust storage box 3. The discharge cylinder 34 is a hydraulic cylinder operated hydraulically and is a multistage telescopic cylinder. The rear end of the discharge cylinder 34 is rotatably supported by a shaft member 36 on a support member 35 provided below the discharge plate 30. On the other hand, although not shown, the front end of the discharge cylinder 34 is rotatably supported at the front in the dust container 3.

Further, as shown in FIG. 3, the dust collection vehicle 1 includes, for example, a rising limit switch 41 that detects the extension of the sliding cylinder 26 on the left side in the vehicle width direction before the maximum extension position. Further, below the rising limit switch 41, a lowering limit switch 42 is provided which detects the reduction of the sliding cylinder 26 in front of the minimum reduction position. Each

limit switch

41 and 42 is attached to the outer side wall of the periphery of the sliding opening 5b. The upper limit switch 41 and the lower limit switch 42 are, for example, proximity switches.

On the other hand, a mounting bracket 26c is formed to project rearward at the tip of the cylinder rod 26a, and a first metal plate 43 is bolted to the mounting bracket 26c. The first metal plate 43 is attached at a predetermined distance from the rising and falling

limit switches

41 and 42, and the rising and lowering

limit switches

41 and 42 detect the first metal plate 43 approaching and is detected. It is configured to send a signal to a control device 60 (see FIG. 8) as control means.

Further, as shown in FIG. 2, the dust collection vehicle 1 is provided with a reversing limit switch 45 that detects the extension of the rocking cylinder 28 before the minimum reduction position. Further, below the reverse limit switch 45, a compression limit switch 46 is provided which detects the extension of the rocking cylinder 28 before the maximum extension position. Each

limit switch

45, 46 is attached to a mounting bracket 47 connected to the slide plate 22, and moves up and down together with the slide plate 22. These inversion and

compression limit switches

45 and 46 are also configured by, for example, proximity switches.

On the other hand, the second metal plate 48 is also bolted to the cylinder tube 28 a of the swing cylinder 28. The second metal plate 48 is attached at a predetermined distance from the limit switches 45 and 46, and the limit switches 45 and 46 detect the approaching second metal plate 48, and the detection signal is sent to the control device 60. It is configured to send. Furthermore, an operation switch 49 (see FIG. 1) is provided at the rear end of the dust input box 5, and a signal from the operation switch 49 is also sent to the control device 60.

As shown in FIGS. 1 and 8, a rectangular parallelepiped electrical component storage box 50 is provided on the vehicle body frame 2 b between the driver's cab 2 a and the dust storage box 3. In the electrical component storage box 50, a control device 60, an electric double layer capacitor 51 as a storage device, an inverter 52, an electric motor 53 as a motor, and the like are stored. Specifically, the electric motor 53 is disposed on the lower left and right one side of the rectangular shaped electric component storage box 50. For example, four electric double layer capacitors 51 are arranged side by side. An inverter 52 is disposed on the left and right opposite sides of the electric motor 53, and the electric motor 53 and the inverter 52 are electrically connected to each other. An automatic voltage regulator 54 for adjusting a voltage of a generator 59 described later and a contactor box 55 for power on / off of the inverter 52 are provided above the electric motor 53 and at the left and right center side. Just above the electric motor 53, a control device 60 and a touch panel 56 for various operations are provided on the surface of the control device 60. In addition, the electric wire which connects between each electric equipment is abbreviate | omitted for simplification.

As shown in FIG. 9, the motorized dust collection vehicle 1 includes a transmission 58 driven by a vehicle engine 57. Further, the electric garbage collection vehicle 1 is provided with a generator 59 driven by a vehicle engine 57. The electric power obtained by the generator 59 is supplied to the inverter 52 through the electric double layer capacitor 51 or the direct control device 60 through the automatic voltage regulator 54 housed in the electric component housing box 50, and thereafter , And adjusted by the inverter 52 and supplied to the electric motor 53. Further, since the electrical wiring with the electric motor 53, the inverter 52, and the automatic voltage regulator 54 is accommodated in the electrical component storage box 50, the appearance is good and the maintenance is also excellent. Furthermore, since the electric motor 53 is accommodated in the electric component storage box 50, the sound of the electric motor 53 is less likely to leak.

FIG. 10 shows a hydraulic circuit of the hydraulic device 70 of the motor-driven dust collection vehicle 1 according to the first embodiment of the present invention. The hydraulic device 70 includes a hydraulic pump 61 driven by the electric motor 53. The hydraulic pump 61 supplies hydraulic fluid for operating the

cylinders

9, 26, 28, 34, which are hydraulic actuators for driving the dust loading device 20. The hydraulic pump 61 is a swash plate type variable displacement type in which a discharge flow rate is varied by tilting a swash plate, and it is made of, for example, a variable displacement piston pump, and as shown in FIG. It is directly connected to 53a. By arranging in this way, it is not necessary to accommodate the hydraulic pump 61 in the lower part of the electrical component storage box 50, and the space in the lower part of the electrical component storage box 50 is wide enough to arrange many electric double layer capacitors 51. It has become. Further, a hydraulic oil tank 62 in which hydraulic oil flowing through the hydraulic pump 61 is stored is provided below and behind the electrical component storage box 50. The hydraulic oil tank 62 and the hydraulic pump 61 are connected by a hydraulic pipe 63. The hydraulic piping 63 can be easily piped from the lower portion of the hydraulic pump 61 protruding from the lower side of the electrical component storage box 50 to the lower and rear hydraulic oil tank 62.

The hydraulic oil in the hydraulic oil tank 62 is sucked up by the hydraulic pump 61 through the hydraulic pipe 63 and circulated to the hydraulic pipe 73 a on the supply side so as to be supplied to the control valve 72. Each

cylinder

9, 26, 28, 34 is connected to the control valve 72 via a hydraulic pipe 73c. The hydraulic oil that has passed through the control valve 72 is made to flow through the hydraulic pipe 73b on the recovery side, filtered by the return filter 65, and then collected again in the hydraulic oil tank 62.

As schematically shown in FIG. 11, the control valve 72 includes a sliding solenoid 72a for controlling the contraction and extension of the sliding cylinder 26, a swing solenoid 72b for controlling the contraction and extension of the swing cylinder 28, and A rotation solenoid 72c that controls the contraction and extension of the moving cylinder 9 and an ejection solenoid 72d that controls the contraction and extension of the ejection cylinder 34 are provided. These four solenoids 72a to 72d are, for example, three-position switching solenoid valves.

Further, a control solenoid 72e for controlling the solenoid control valve 64 (see FIG. 10) is connected to the control device 60. The solenoid control valve 64 is, for example, a three-position switching solenoid valve. Moreover, this three-position switching solenoid valve can also be used combining two two-position switching solenoid valves. The control solenoid 72e operates the solenoid control valve 64 according to the control signal of the control device 60 to operate the pump control cylinder 74 in any of the directions in which the pump control cylinder 74 extends, shrinks, or stops (neutral). It is to control it. The pump control cylinder 74 adjusts the inclination of the swash plate of the hydraulic pump 61 by expansion and contraction thereof to adjust the discharge flow rate of the hydraulic pump 61.

Next, the operation of the dust loading device 20 will be described based on the flowcharts of FIGS. 12 to 15 and the diagram showing the change of the discharge flow rate of the hydraulic pump of FIG. As shown in FIG. 4, the dust loading device 20 configured as described above usually has a sliding cylinder 26 (not shown in FIGS. 4 to 7 for the sake of simplification. See FIG. 2). The rocking cylinder 28 is extended, and the sliding plate 22 is in the rising end position (standby state). In this standby state, the dust D is introduced into the dust input box 5 through the rear insertion port 6.

Next, as shown in FIG. 12, in step S01, the loading operation of the operation switch 49 is turned ON to start the loading operation. In step S02, a signal is sent from the control device 60, the electric motor 53 rotates, and the hydraulic pump 61 is driven. Further, a signal is sent from the control device 60 to the rocking solenoid 72b, and the rocking solenoid 72b is on the reduction side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 increases steplessly to the set amount A as shown in FIG. Do. As a result, the oscillating cylinder 28 starts the reduction operation from the maximum extension position shown in FIG. 4 and the compression plate 27 starts the reverse operation slowly and smoothly.

Next, in step S03, the swing cylinder 28 is contracted while the discharge flow rate of the hydraulic pump 61 remains the set amount A, and the compression plate 27 is reversely operated. Then, when the reverse limit switch 45 is detected in step S04, the process proceeds to step S05, and reverse reverse operation is started. That is, in step S05, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is in the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 decreases steplessly from the set amount A as shown in FIG. Do. As a result, the rocking cylinder 28 ends the reduction operation slowly and smoothly. Then, a signal is sent from the control device 60 to the rocking solenoid 72b, the rocking solenoid 72b is brought to the neutral position, and the compression plate 27 is reversely stopped (step S06). Thereafter, in step S07, the timer pauses for T ₁ (for example, about 0.1) seconds by the timer, and the process proceeds to step S11 shown in FIG.

Next, in step S11 of FIG. 13, a signal is sent from the control device 60 to the sliding solenoid 72a, and the sliding solenoid 72a is on the reduction side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, as the flow of hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 increases steplessly to the set amount B as shown in FIG. Do. Thereby, the slide cylinder 26 starts the reduction operation from the maximum extension position shown in FIG. 5 and the slide plate 22 and the compression plate 27 start the lowering operation slowly and smoothly.

Next, in step S12, the sliding cylinder 26 is contracted while the discharge flow rate of the hydraulic pump 61 remains the set amount B, and the sliding plate 22 and the compression plate 27 are lowered. Then, in step S13, when the descent limit switch 42 is detected, the process proceeds to step S14 and descent decelerating operation is started. That is, in step S14, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 decreases steplessly from the set amount B as shown in FIG. Do. Thereby, the sliding cylinder 26 ends the reduction operation slowly and smoothly. Then, a signal is sent from the control device 60 to the sliding solenoid 72a, and the sliding solenoid 72a is brought to the neutral position to stop the sliding plate 22 and the compression plate 27 from being lowered (step S15). Thereafter, in step S16, the timer pauses for T ₁ (for example, about 0.1) seconds, and the process proceeds to step S21 shown in FIG.

Next, in step S21 of FIG. 14, a signal is sent from the control device 60 to the rocking solenoid 72b, and the rocking solenoid 72b is on the extension side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 increases steplessly to the set amount C as shown in FIG. Do. As a result, the swing cylinder 28 operates to extend from the minimum reduction position shown in FIG. 6 so that the compression plate 27 starts compression operation slowly and smoothly.

Next, in step S22, the swing cylinder 28 extends and the compression plate 27 is compressed while the discharge flow rate of the hydraulic pump 61 remains the set amount C. When the compression limit switch 46 is detected in step S23, the process proceeds to step S24, and the compression / deceleration operation is started. That is, in step S24, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 decreases steplessly from the set amount C as shown in FIG. Do. Thereby, the swing cylinder 28 ends the extension operation slowly and smoothly. Then, a signal is sent from the control device 60 to the rocking solenoid 72a, and the rocking solenoid 72a becomes a neutral position, and the compression plate 27 is compressed and stopped (step S25). Thereafter, in step S26, the timer pauses for T ₁ (for example, about 0.1) seconds, and the process proceeds to step S31 shown in FIG.

Next, in step S31 of FIG. 15, a signal is sent from the control device 60 to the sliding solenoid 72a, and the sliding solenoid 72a becomes the extension side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, the discharge flow rate Q of the hydraulic pump 61 increases steplessly to the set amount D as shown in FIG. Do. Thereby, the slide cylinder 26 operates to extend from the minimum reduction position shown in FIG. 7 so that the slide plate 22 and the compression plate 27 start raising operation slowly and smoothly.

Next, in step S32, the sliding cylinder 26 extends with the discharge flow rate Q of the hydraulic pump 61 remaining the set amount D, and the sliding plate 22 and the compression plate 27 are raised. Then, in step S33, when the rising limit switch 41 is detected, the process proceeds to step S34, and the rising and decelerating operation is started. That is, in step S34, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is in the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, as the flow of hydraulic fluid supplied to the pump control cylinder 74 is controlled by the electromagnetic control valve 64, the discharge flow rate Q of the hydraulic pump 61 decreases steplessly from the set amount D as shown in FIG. Do. As a result, the slide cylinder 26 ends the extension operation slowly and smoothly. Then, a signal is sent from the control device 60 to the sliding solenoid 72a, and the sliding solenoid 72a becomes the neutral position, and the sliding plate 22 and the compression plate 27 are lifted and stopped (step S35). This completes a series of loading operations.

The dust loading device 20 can repeat the dust loading operation in which each step of the above-described inversion, lowering, compression, and raising is one cycle.

When loading the waste D into the waste storage box 3, the discharge plate 30 in the waste storage box 3 is disposed at the rearmost position, and the waste D loaded by the dust loading device 20 is the discharge plate 30. When the pressing force reaches a predetermined value or more, a signal is sent from the control device 60 to the discharge solenoid 72d, and the discharge cylinder 34 is gradually moved forward by contraction. Such movement of the discharge plate 30 can load the dust D while compressing it.

Then, when the dust D is loaded in this way and the dust storage box 3 is full, the discharge operation of the dust D is started. That is, after moving the dust collection vehicle 1 to the dust disposal site or the like, the control device 60 sends a signal to the rotation solenoid 72c to extend the rotation cylinder 9, and the dust insertion box 5 is centered on the insertion box support pin 5a. After turning the rear of the waste storage box 3 into an open state, the discharge cylinder 34 is extended, and the discharge plate 30 located at the front of the waste storage box 3 is moved backward, The dust D accommodated in the dust container 3 is discharged.

As described above, in the motor-driven dust collection vehicle 1 according to this embodiment, the electromagnetic control valve 64 is arbitrarily controlled by the control device 60 to control the flow of hydraulic fluid for operating the pump control cylinder 74. It is possible to control the discharge flow rate Q arbitrarily by adjusting the inclination of the swash plate. For example, when the load increases in the compression process, the pressure of the hydraulic pump P also increases, and when the hydraulic pump P becomes a predetermined value P ₁ or more, control such that the discharge flow rate Q is smoothly decreased as shown in FIG. It is possible to do However, while the pressure of a conventional hydraulic pump P as exceeds a predetermined value P _1, Continuing same delivery rate C from the hydraulic pump P is held, the electric motor 53 connected to the hydraulic pump P and the overload It is necessary to increase the size of the electric motor 53 assuming an overload. In the present embodiment, even if the load acting on the hydraulic pump P increases, it is possible to prevent the electric motor 53 from being overloaded and stopped by smoothly reducing the discharge flow rate Q. 53 can be miniaturized.

Further, in the motorized dust collection vehicle 1 according to the present embodiment, the discharge flow rate of the hydraulic pump 61 is reduced and increased steplessly before and after the switching between the reversing, lowering, compressing and raising operations, thereby changing the respective operations. Oil pressure fluctuation of sliding cylinder 26 and rocking cylinder 28 at the time of operation can be suppressed, and shock noise before and after operation switching can be greatly mitigated by a simple method, and noise at the transition to each operation can be effectively reduced. The noise reduction effect of the electric dust collection vehicle 1 can be further increased.

In the motor-driven dust collection vehicle 1 according to the present embodiment, the electromagnetic control valve 64 controls the flow of hydraulic fluid for operating the pump control cylinder 74 by controlling the signal sent from the control device 60 to the control solenoid 72e. It is possible to adjust the expansion and contraction speed of the sliding cylinder 26 and the oscillating cylinder 28 as different discharge flow rates in the reverse, downward, compression, and upward steps of the discharge flow rate Q of the pump 61.

For example, as shown in FIG. 17, by setting the discharge flow rate Q of the hydraulic pump 61 to D> B> C> A, the time of contraction is larger than the time of expansion of the sliding cylinder 26 and the rocking cylinder 28. By reducing the discharge flow rate Q of the hydraulic pump, the difference in operating speed between the extension time and the reduction time of the sliding cylinder 26 and the oscillating cylinder 28 is reduced. Further, since the stroke of the slide cylinder 26 is longer than that of the swing cylinder 28, if the discharge flow rate of the hydraulic pump 61 is the same, the slide cylinder 26 operates for a longer time. By increasing the discharge flow rate, the operating speed of the sliding cylinder 26 is increased to shorten the lowering and rising operation time.

Second Embodiment
FIGS. 18 to 23 show a second embodiment of the present invention, which differs from the first embodiment mainly in that the dust loading device 81 is a rotary type. The same parts as in FIG. 1 to FIG. 11 are assigned the same reference numerals and detailed explanations thereof will be omitted.

FIG. 18 shows the dust loading device 81 of the electric dust collecting vehicle 80 as a rotary dust collecting vehicle according to the second embodiment of the present invention, and the rotary dust loading device 81 is provided in the dust loading box 5. The dust D introduced through the rear insertion port 6 is compressed and loaded into the dust storage box 3 through the rear opening 4.

In the dust loading device 81, the middle portion is supported by the side wall surface of the dust input box 5, and the pressing plate 82 swings one end in the back and forth direction, and the other end of the pressing plate 82 has the tip of the cylinder rod 83a. A pressing cylinder 83 rotatably supported to operate the pressing plate 82, a rotating plate 84 rotatable below the pressing plate 82 with the base end 84a as a fulcrum, and a reduction gear 85a at the base end 84a of the rotating plate 84 And a hydraulic motor 85 (see FIG. 20) for rotating the rotary plate 84. By cooperative operation of the rotation operation of the rotary plate 84 and the swinging operation of the pushing plate 82 configured as described above, the dust D introduced into the dust insertion box 5 is compressed and loaded into the dust storage box 3.

Then, as shown in FIGS. 18 and 19, the motorized dust collection vehicle 80 is provided with, for example, a return limit switch 86 for detecting the reduction of the push cylinder 83 on the right side in the vehicle width direction before the minimum reduction position. A push limit switch 87 is provided at the rear of and below the return limit switch 86 for detecting the extension of the push cylinder 83 before the maximum extension position. For example, each

limit switch

86, 87 is attached to the inner side wall of the dust input box 5, and is, for example, a proximity switch.

On the other hand, the first metal plate 88 is bolted to the cylinder rod 83a. The first metal plate 88 is mounted at a predetermined distance from the return limit switch 86 and the push limit switch 87, and the return limit switch 86 and the push limit switch 87 detect the approaching first metal plate 88, The detection signal is sent to the control device 60 as a control means.

Similarly, in the motorized dust collection vehicle 80, the position where the tip of the rotary plate 84 faces the rear opening 4 when the rotary plate 84 rotates, that is, the surface of the rotary plate 84 and the bottom surface of the dust storage box 3 become substantially horizontal. A rotation limit switch 89 for detecting before the position and an avoidance limit switch 90 for avoiding contact with the pushing plate 82 are provided. For example, the rotation limit switch 89 is attached to the outer side wall of the dust input box 5 without the reduction gear 85a, and is configured by a proximity switch.

On the other hand, the second metal plate 91 is bolted to the base end 84 a of the rotary plate 84. The second metal plate 91 is attached at a predetermined distance from the rotation limit switch 89, and the rotation limit switch 89 detects the approaching second metal plate 91 and sends a detection signal to the control device 60. Is configured.

As schematically shown in FIG. 19, the control valve 102 includes a pressing solenoid 102 a that controls the reduction and extension of the pressing cylinder 83, a rotating solenoid 102 b that controls forward and reverse rotation of the hydraulic motor 85, and a rotating cylinder 9. A solenoid 72c for controlling the reduction and extension of the cylinder, and a tilt solenoid 102c for controlling the reduction and extension of the tilting cylinder 37 for making the waste storage box 3 tiltable (dumpable) about the tilt axis at the rear of the vehicle body 2; Have. These four

solenoids

102a, 102b, 72c and 102c are, for example, three-position switching solenoid valves.

Further, to the control device 60, a control solenoid 72e that controls the same electromagnetic control valve 64 as the above embodiment is connected.

The hydraulic circuit of the hydraulic equipment 100 of the refuse collection vehicle in 2nd Embodiment of this invention is shown in FIG. The

cylinders

9, 83, 37 and the hydraulic motor 85 are connected to the control valve 102 via a hydraulic pipe 73c. By switching the opening and closing ports of the

solenoids

102a, 102b, 72c, 102c, 72e provided in the control valve 102, the hydraulic oil discharged from the hydraulic pump 61, which is driven to rotate the electric motor 53, can be moved to the desired

cylinder

9, 83, 37 or hydraulic motor 85 is configured to be supplied. As a result, switching of the expansion and contraction operation of the

cylinders

9, 83, 37 and forward and reverse rotation of the hydraulic motor 85 are controlled by the signal sent from the control device 60, or the operation is stopped. It has become so.

Next, the operation of the dust loading device 81 will be described based on the flowcharts of FIGS. 21 to 23. In the dust loading device 81 configured as described above, normally, as shown by an imaginary line in FIG. 18, a state in which the pushing cylinder 83 extends and the tip of the rotary plate 84 faces the rear opening 4 is in the standby state. It has become. In this standby state, the dust D is introduced into the dust input box 5 through the rear insertion port 6.

Next, as shown in FIG. 21, in step S101, a loading operation is started by turning on the loading switch of the operation switch 49. In step S102, a signal is sent from the control device 60, the electric motor 53 rotates, and the hydraulic pump 61 is driven. Further, a signal is sent from the control device 60 to the rotation solenoid 102b, and the rotation solenoid 102b is in the forward rotation side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, whereby the discharge flow rate of the hydraulic pump 61 is steplessly increased to E. As a result, the hydraulic motor 85 starts forward rotation clockwise from a standby state shown by an imaginary line in FIG. 18 so that the rotating plate 84 slowly and smoothly starts normal rotation operation.

Next, in step S103, the hydraulic motor 85 rotates in the forward direction with the discharge flow rate of the hydraulic pump 61 remaining at E, and the rotating plate 84 operates normally. Then, in step S104, it is detected whether or not the avoidance limit switch 90 has been detected, that is, the rotation of the rotation plate 84 to a position where the rotation plate 84 and the pressing plate 82 do not contact. When the avoidance limit switch 90 is detected, the process proceeds to step S105, and the return deceleration operation is started.

In step S105, a signal is sent from the control device 60 to the pressing solenoid 102a, and the pressing solenoid 102a is on the reduction side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is further inclined. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, whereby the discharge flow rate of the hydraulic pump 61 increases from E to F steplessly. As a result, the pressing cylinder 83 starts the reduction operation, and the pressing plate 82 slowly and smoothly returns to start the deceleration operation. The amount of hydraulic fluid supplied to the hydraulic motor 85 remains at E, and the rotary plate 84 is maintained at a constant rotation.

Next, at step S106, the pushing cylinder 83 is reduced at normal speed with the discharge flow rate of the hydraulic pump 61 remaining at F, and the pushing plate 82 is returned to normal operation. Next, in step S107, it is determined whether the return limit switch 86 has been detected. Until the return limit switch 86 is detected, the discharge flow rate of the hydraulic pump 61 remains F, and the rotary plate 84 rotates and the push cylinder 83 continues to contract, and the push plate 82 returns normally.

When the return limit switch 86 is detected, the process proceeds to step S108, where the return deceleration operation is started. That is, a signal is sent from the control device 60 to the control solenoid 72e, the electronic control valve 64 is on the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is slightly raised. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, whereby the discharge flow rate of the hydraulic pump 61 decreases from F to steplessly to E. Thereby, the pushing cylinder 83 operates to reduce slowly and smoothly.

Then, a signal is sent from the control device 60 to the pressing solenoid 102a, and the pressing solenoid 102a becomes the neutral position, and the reduction operation of the pressing cylinder 83 stops and becomes the minimum reduction position, and the pressing plate 82 is shown by solid lines in FIG. The return end position is reached (step S109). Thereafter, the process proceeds to step S111 illustrated in FIG.

Next, in step S111 of FIG. 22, it is determined whether the rotation limit switch 89 has been detected. Until the rotation limit switch 89 is detected, the hydraulic motor 85 continues to operate in the forward direction with the discharge flow rate of the hydraulic pump 61 remaining at E. At this time, the rotary plate 84 presses the dust D from above, feeds it back, and further lifts it.

When the rotation limit switch 89 is detected, the process proceeds to step S112, and the rotation decelerating operation is started. That is, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is in the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, whereby the discharge flow rate of the hydraulic pump 61 decreases steplessly from E. As a result, the hydraulic motor 85 is decelerated, and the rotating plate 84 is decelerated slowly and smoothly.

Then, a signal is sent from the control device 60 to the rotation solenoid 102b, the rotation solenoid 102b becomes the neutral position, the forward rotation operation of the hydraulic motor 85 stops, and the position where the tip of the rotation plate 84 faces the rear opening 4 Then, the refuse D is lifted to the height of the bottom of the refuse storage box 3 (step S113). Thereafter, in step S114, the timer pauses for T ₁ (for example, about 0.1) seconds, and the process proceeds to the next step S115.

Next, in step S115, the pushing speed reduction operation is performed. That is, a signal is sent from the control device 60 to the pressing solenoid 102a, and the pressing solenoid 102a is on the extension side. Further, a signal is sent from the control device 60 to the control solenoid 72e, the solenoid control valve 64 is on the contraction side, the pump control cylinder 74 is contracted, and the swash plate of the hydraulic pump 61 is tilted. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, so that the discharge flow rate of the hydraulic pump 61 is steplessly increased to G. As a result, the pushing cylinder 83 starts the extension operation from the minimum reduction position, and the pushing plate 82 starts the pushing deceleration operation slowly and smoothly.

Next, the process proceeds to step S118 in FIG. 23 and the normal pressing operation is performed. That is, while the discharge flow rate of the hydraulic pump 61 is G, the pushing cylinder 83 extends and operates at a normal speed, and the pushing plate 82 normally operates to push the dust D on the rotating plate 84 backward.

Next, in step S119, it is determined whether the push limit switch 87 has been detected. The discharge flow rate of the hydraulic pump 61 remains at G, that is, the pressing cylinder 83 continues the extension operation at the normal speed until the pressing limit switch 87 is detected. Thereby, the dust D on the rotary plate 84 is pushed into the dust storage box 3 from the rear opening 4 by the pushing plate 82.

When the push limit switch 87 is detected, the process proceeds to step S120, and the push deceleration operation is started. That is, a signal is sent from the control device 60 to the control solenoid 72e, the electronic control valve 64 is on the extension side, the pump control cylinder 74 is extended, and the swash plate of the hydraulic pump 61 is raised. That is, the flow rate of the hydraulic oil supplied to the pump control cylinder 74 is controlled by the solenoid control valve 64, so that the discharge flow rate of the hydraulic pump 61 decreases steplessly from G. As a result, the pushing cylinder 83 operates to extend slowly and smoothly.

Then, a signal is sent from the control device 60 to the pressing solenoid 102a, and the pressing solenoid 102a becomes the neutral position, and the extension operation of the pressing cylinder 83 is stopped to be the maximum extension position, and the pressing plate 82 is an imaginary line in FIG. The loading end position shown is reached, and a series of loading operations are finished (step S121). And dust loading operation which made these processes one cycle can be performed repeatedly.

As described above, also in the motor-driven dust collection vehicle 80 according to the present embodiment, the discharge flow rate of the hydraulic pump 61 is decreased and increased before and after the switching of each operation, whereby the pressing cylinder 83 and the hydraulic motor at the transition of each operation The hydraulic pressure fluctuation of 85 can be suppressed, the impact noise before and after the operation switching can be greatly reduced by a simple method, the noise at the transition to each operation can be effectively reduced, and the electric dust collection vehicle The noise reduction effect of 80 can be further increased.

(Other embodiments)
The present invention may be configured as follows for each of the above embodiments.

In each of the above embodiments, the electric double layer capacitor 51 is arranged at the lower stage of the electrical component storage box 50 opened by vertically placing the hydraulic pump 61, but other electric devices and the like may be arranged. Furthermore, the electric double layer capacitor 51 may be provided other than in the lower part in the electrical component storage box 50, or may be arranged near the hydraulic oil tank 62.

In each of the above-described embodiments, the power storage device is an electric double layer capacitor. However, the present invention is not limited to this, and a lead storage battery, a lithium ion secondary battery, a nickel-hydrogen storage battery or the like may be used.

In the above embodiments, the power supply means is the generator 59, but may be a power supply such as external power. In each of the above embodiments, the electric

dust collection vehicle

1, 80 is capable of regenerative braking, but regenerative braking is not always necessary. In that case, the electric double layer capacitor 51 can be used as the generator 59 or external power It is sufficient to charge the battery.

In the above embodiments, the dust collection vehicle is the electric

dust collection vehicle

1, 80. However, the present invention is not limited to this, and the dust collection is driven by the power transmission device (PTO) driven by the vehicle engine 57. The present invention is also applicable to a car. The hydraulic pump is directly driven by the vehicle engine 57 through the PTO in a general dust collection vehicle that is not an electric dust collection vehicle, but with the conventional fixed displacement hydraulic pump, when the hydraulic pump is overloaded, the vehicle engine 57 Since there is a risk of stopping, it was necessary to accelerate the vehicle engine 57. However, by applying the present invention to this general waste collection vehicle, the discharge flow rate Q can be smoothly reduced when the hydraulic pump is overloaded, so extra operations such as accelerating the vehicle engine are It becomes unnecessary. Further, the noise before and after the end of each operation is also reduced as described above.

In each of the above embodiments, the hydraulic pump 61 is a piston pump, but it is not limited to this, and it may be a variable displacement hydraulic pump that can be placed vertically.

The above embodiments are essentially preferred examples, and are not intended to limit the scope of the present invention, its applications and uses.

The dust collection vehicle of the present invention is useful as a dust collection vehicle provided with a dust loading device for loading the dust introduced into the dust input box into the dust storage box.

Claims

A waste container box mounted on the vehicle body and having a rear opening;
A waste input box connected to the rear opening of the waste storage box and having a rear insertion opening;
A dust loading device provided in the dust input box and driven by a hydraulic actuator;
A hydraulic pump supplying hydraulic fluid for operating a hydraulic actuator of the dust loading device, and a swash plate type variable displacement hydraulic pump in which a discharge flow rate is varied by tilting a swash plate;
A pump control cylinder which is driven by hydraulic fluid and adjusts the inclination of the swash plate of the hydraulic pump by expansion and contraction;
An electromagnetic control valve that controls the flow of hydraulic fluid that operates the pump control cylinder;
And a control device for controlling the solenoid control valve.
The hydraulic actuator is a hydraulic cylinder,
The solenoid control valve gradually increases the discharge flow rate of the hydraulic pump to a set amount at the start of the expansion and contraction operation of the hydraulic cylinder, and does not increase the discharge flow rate of the hydraulic pump from the set amount at the end of the expansion and contraction operation of the hydraulic cylinder The waste collection vehicle according to claim 1, wherein the flow of hydraulic fluid that operates the pump control cylinder is controlled to decrease stepwise.
The hydraulic actuator is a hydraulic cylinder,
The dust collection vehicle according to claim 1 or 2, wherein the solenoid control valve adjusts the extension / contraction speed of the hydraulic cylinder by controlling the flow of hydraulic fluid that operates the pump control cylinder.
The dust loading device includes a sliding plate slidable in the vertical direction by the expansion and contraction operation of the sliding cylinder as the hydraulic actuator, and the expansion and contraction operation of a rocking cylinder as the hydraulic actuator at the lower end of the sliding plate. The compressor includes a compression plate swingable in the front-rear direction of the vehicle body, and the sliding plate and the compression plate operate as one cycle of inversion, lowering, compression and lifting by the expansion and contraction operation of the sliding cylinder and the oscillating cylinder. The refuse collection vehicle according to claim 1, wherein the refuse introduced into the refuse insertion box through the rear insertion port is loaded into the refuse storage box.
In the dust loading device, the middle portion is supported by the side wall surface of the dust input box, and the pressing plate swings one end in the back and forth direction, and the rod end is rotatably supported by the other end of the pressing plate A push cylinder as the hydraulic actuator for operating the push plate, a rotary plate rotatable below the push plate with a base end as a fulcrum, and a base end of the rotary plate connected via a reduction gear, And the hydraulic motor as the hydraulic actuator for rotating and operating, the cooperative operation of the pushing plate and the rotary plate compresses the dust introduced into the dust input box through the rear insertion port, from the rear opening The refuse collection vehicle according to claim 1, which is to be loaded into the refuse storage box.