JP2005329871A - Driving device of working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving device of a working vehicle capable of reducing the noise, the amount of exhaust gas, and the fuel consumption by driving a hydraulic pump with one or both of engine drive and electric motor drive. <P>SOLUTION: In the working vehicle, the hydraulic pump 10 is driven by engine 14 drive via a power extracting device 12, and a working vehicle mounted on the vehicle is operated by driving the hydraulic pump 10. The hydraulic pump 10 can be driven by driving the electric motor 15 mounted to the vehicle separately from the engine 14 drive, or is driven by one or both of the engine 14 drive and the electric motor 15 drive. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a drive device for operating a work device in a work vehicle equipped with the work device.

  2. Description of the Related Art Conventionally, for example, a garbage collection vehicle as a work vehicle has a loading work device mounted on the vehicle, and this loading work device has a dust input box provided with a dust loading device at the rear opening of the dust storage box. Are arranged in a tiltable manner, and a discharge plate is slidable back and forth in the dust container.

  As the dust is loaded by the dust loading device, the discharge plate is sequentially moved forward so that the dust is compressed and loaded into the dust container, and the dust input box is tilted upward to rear the dust container. The dust is discharged to the outside by moving the discharge plate to the rear in a state of opening (see, for example, Patent Document 1).

By the way, the above-described operation of the dust loading device, the sliding of the discharge plate, and the tilting of the dust box are performed by the expansion and contraction operations of the hydraulic cylinders provided, and these hydraulic cylinders are driven by the vehicle engine drive. This is done by driving a hydraulic pump through a take-out device and supplying pressure oil from the hydraulic pump.
JP 2000-219303 A

  However, in the case of driving the hydraulic pump by driving the engine as in the conventional case, since the engine is driven at a high speed when driving the hydraulic pump, the engine noise increases and the amount of exhaust gas also increases. In addition, there is a problem in that the environment deteriorates and fuel consumption increases, resulting in poor fuel consumption.

  The present invention has been made in view of the above problems, and the object of the present invention is to reduce the noise and exhaust by driving the hydraulic pump using either engine driving or electric motor driving or a combination of both. An object of the present invention is to provide a drive device for a working vehicle capable of reducing gas amount and reducing fuel consumption.

  In order to achieve the above object, a working vehicle drive device according to the first aspect of the present invention drives an oil pump through a power take-off device by driving an engine, and the working device is mounted on the vehicle by driving the hydraulic pump. In the working vehicle configured to operate the hydraulic pump, the hydraulic pump can be driven by driving an electric motor mounted on the vehicle separately from the engine driving, and the engine driving and the electric motor driving are used in combination. Alternatively, the hydraulic pump is driven by driving either one of them.

  According to the present invention, low noise and exhaust gas volume can be reduced according to work conditions such as nighttime, and work can be performed after ensuring a good environment without deteriorating the environment to the surroundings. In addition, the amount of fuel consumption can be suppressed as much as possible, and the operation can be performed economically with low fuel consumption.

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

  FIG. 1 shows a garbage truck as an example of a working vehicle.

  In FIG. 1, reference numeral 1 denotes a vehicle frame. A driver's seat 2 is disposed at the front of the vehicle frame 1, and a loading work device A as a work device is mounted at the rear thereof.

  The loading work device A includes a dust storage box 3 mounted on the vehicle frame 1 and a dust input box 5 connected to the rear portion of the dust storage box 3.

  Specifically, the rear surface of the dust container 3 is formed as an open opening, and a dust input box 5 is connected to the opening so as to be tiltable by a telescopic operation of a hydraulic cylinder (not shown) via a pivot 4. Yes.

  The dust input box 5 is provided with a dust loading device which is operated by extending and retracting a plurality of well-known hydraulic cylinders (not shown), and an input port formed at the rear of the dust input box 5 by the dust loading device. The dust thrown in from 51 is loaded into the dust container 3.

  On the other hand, a discharge plate 6 is slidably disposed in the front-rear direction in the dust storage box 3, and a hydraulic cylinder (not shown) provided between the front portion of the dust storage box 3 and the discharge plate 6 is expanded and contracted. By operation, the discharge plate 6 is provided so as to be able to reciprocate back and forth in the dust container 3.

  Therefore, when a reaction force of a predetermined pressure or more acts on the discharge plate 6 due to the loading of the dust into the dust storage box 3 by the dust loading device, the dust is removed by moving the discharge plate 6 sequentially forward. The container 3 can be compressed and loaded with high density. In addition, the dust input box 5 is tilted upward, and the discharge plate 6 is moved from the front to the rear in a state where the rear surface of the dust storage box 3 is opened, so that the dust is discharged to the outside.

  Reference numeral 7 in FIG. 1 denotes an operating device provided on the side of the input port 51 of the dust input box 5, and the operation device 7 performs various operations such as starting and emergency stop of the dust loading device.

  By the way, a plurality of hydraulic cylinders that operate the dust loading device described above, reciprocate the discharge plate 6, and tilt the dust throwing box 3 are driven by a hydraulic pump by a hydraulic drive system, and pressure oil is supplied from the hydraulic pump. Is done by supplying.

  FIG. 2 shows the configuration of the hydraulic drive system.

  In FIG. 2, reference numeral 10 denotes a hydraulic pump, and the hydraulic pump 10 is configured to be driven by a combination of engine driving and electric motor driving or by either driving.

  Specifically, the hydraulic pump 10 has a drive shaft connected to a take-out shaft of a power take-out device (PTO) 12 via a drive shaft 11. The power take-out device 12 is connected to the output shaft of the engine 14 via the transmission 13.

  On the other hand, the output shaft of the electric motor 15 is connected to the drive shaft 11 via a transmission mechanism 16 such as a belt. The electric motor 15 is driven by a battery 17 dedicated to the electric motor 15 or mounted on the vehicle.

  In addition, a clutch 18 is interposed in the drive shaft 11, and the clutch 18 connects and disconnects the power take-out device 12 and the hydraulic pump 10.

  By configuring the hydraulic drive system for driving the hydraulic pump 10 in this way, for example, by driving the hydraulic pump 10 mainly by driving the electric motor 15 according to work conditions such as at night, engine noise and exhaust gas Generation of the amount can be suppressed as much as possible. That is, low noise and a reduction in the amount of exhaust gas can be achieved, and work can be carried out while ensuring a good environment without causing environmental degradation to the surroundings. Further, the amount of fuel consumption can be suppressed as much as possible, and the operation can be performed economically with low fuel consumption.

  Note that the above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.

  For example, in the present embodiment, a dust collection vehicle has been described as an example of the work vehicle. However, the work vehicle is not limited to this, and the work device is operated by a hydraulic pump such as a vehicle in which an aerial work device is mounted. It can be applied to all working vehicles.

It is a side view which shows a refuse collection vehicle. It is the schematic which shows the hydraulic drive system of a loading operation apparatus.

Explanation of symbols

1 Car frame 10 Hydraulic pump 12 Power take-off device 14 Engine 15 Electric motor A Loading work device (work device)

Claims (1)

In a working vehicle configured to drive a hydraulic pump via a power take-off device by driving an engine and operate a working device mounted on the vehicle by driving the hydraulic pump,
The hydraulic pump can be driven by driving an electric motor mounted on a vehicle separately from the engine driving, and the hydraulic pump is driven by using the engine driving and the electric motor driving together or by either driving. A drive device for a working vehicle, characterized by being configured to cause

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