JP2012153505A - System for using both of internal combustion engine on movable working vehicle and external power supply - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system for using both of an internal combustion engine on a movable working vehicle and an external power supply together, wherein a normal engine can be used as a drive unit for traveling, high lift working or lifting a heavy load for daytime, and as a power unit for road works or rock excavation, and a quiet drive source can be used at night.SOLUTION: The system for using both of the internal combustion engine on the movable working vehicle and the external power supply together includes: a traveling engine 2; a PTO unit 4; an electric motor 11 driven by taking electricity out of the external power supply 10; a hydraulic pump 12 driven by a switching clutch 13; an actuator 5 driven by this; and a control means for controlling the actuator and the pump 12.

Description

  The present invention relates to a moving work for generating hydraulic pressure of a working hydraulic pump by selectively using the power of an internal combustion engine mounted on a self-propelled work vehicle such as a crane truck or an aerial work vehicle and the power of an electric motor by an outside The present invention relates to an external power supply combined system equipped with both an internal combustion engine and an electric motor of a vehicle.

  Conventionally, work vehicles that take out the power of the engine and use it for the purpose of driving in addition to using the power of the engine of the self-propelled work vehicle for other purposes are used in various fields. It is widely known that it is used. For example, a crane truck that raises materials to a high place, an attachment to the rear of the vehicle body to cultivate soil with an agricultural tractor, and a mechanism for a farming device that extracts part of the power connected to the attachment, There is an example of a fire engine that is provided with a power take-off mechanism from the engine and uses it as the power of a water discharge pump. In addition, when the ship engine used for the original propulsion drive is taken out and used as the power source of the crane, or the power of the truck engine is used as a drive unit for raising and lowering the electric wire drum used in the overhead wiring work There are cars. In such a device, when power is used as another power source, a power switching mechanism is required.

  When using the power of a diesel engine or gasoline engine (hereinafter referred to as engine or power source) for other purposes, in order to use that power source for other purposes, PTO (POWER TAKE OFF) Such a power take-out device and a power switching device are required. Conventionally, as this power switching device, an engine for traveling such as a vehicle, for other purposes, for example, a drive device for lifting materials (heavy objects) at a high place, an excavation device for excavating a rock mass, road construction Therefore, a power take-out device, a drive device, or the like corresponding to the purpose is necessary. Specific examples of a power take-out device such as a PTO include a gear train speed change drive device, a belt drive device, a chain drive device, and the like that take out engine power with a drive shaft and rotate it.

  The power supply system for a crane vehicle includes an engine that serves as a prime mover for traveling, a battery that supplies power to a cell motor that starts the engine, a PTO that extracts the rotational power of the engine, a main hydraulic pump coupled to the PTO, and a main A hydraulic actuator as a working machine driven by a hydraulic pump, a sub hydraulic pump that drives the hydraulic actuator when the engine is stopped, an electric motor connected to the sub hydraulic pump, a work battery that supplies power to the electric motor, and the like One is known (Patent Document 1).

  As described above, in a vehicle that uses the power of the engine for work purposes other than traveling, only one engine is required and it can be used for various purposes. Types of vehicles (fire-fighting vehicles, crane vehicles, excavation vehicles used in mines, etc.) are manufactured for each purpose.

JP2009-209760

  In special vehicles that use a traveling engine for lifting an object or working at a high place, such as conventional work vehicles used for construction such as crane trucks, the power of the engine is supplied via a PTO switching operation mechanism. This is common to all work vehicles in that the same engine is used for this purpose. Therefore, for example, when working at night near a house, a problem arises in terms of the working environment inevitably at night because one installed engine is used. That is, noise, off-flavor, exhaust gas, etc. have an adverse effect on the environment, making it easy to make complaints from the neighborhood. In addition to the engine, driving an electric motor requires a battery with a large capacity, or the purpose of use does not require a large amount of power, and also requires charging, so the working efficiency is not good.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. During the daytime, a normal engine is used for driving, working at a high place, lifting a heavy object, power for road construction and rock excavation equipment. It is an object of the present invention to provide an internal combustion engine and an external power source combined system for a mobile work vehicle that can be used and can use a quiet drive source at night.

  That is, in order to cope with the above-described problems, the present invention is directed to a hydraulic pump in which an internal combustion engine and an external power source combined system of a mobile work vehicle are driven by taking out electricity from a traveling engine, a PTO device, and an external power source, and the hydraulic pressure An actuator driven by a pump, and a control means for controlling the actuator and the pump are provided.

  The internal combustion machine of the mobile work vehicle and the actuator of the external power supply combined system are hydraulic motors.

  The internal combustion engine of the mobile work vehicle and the actuator of the external power source combined system are hydraulic cylinders.

  If it is said means, since an engine is not used except at the time of driving | running | working, a noise, a strange odor, exhaust gas, etc. do not generate | occur | produce, but the bad influence to an environment can be prevented. In particular, no noise is generated and no complaints are generated even when the surroundings are operated on a quiet day such as at night or on holidays. In addition, since no fuel such as light oil or heavy oil is used, it is an energy saving measure and the burden of expenses is reduced accordingly.

FIG. 1 is a conceptual diagram when the present invention is applied to a crane vehicle. FIG. 2 is a block diagram showing the configuration of the present invention as a flowchart.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of a crane truck showing the present invention in a simple diagram, and FIG. 2 is a block diagram showing the configuration of the present invention as a flowchart.

  As shown in FIG. 1, the internal combustion engine and the external power source combined system for a mobile work vehicle according to the present invention are mounted on a crane vehicle 1 as an example. 2 is an engine for driving the crane vehicle 1, 4 is a PTO device for extracting the power of the engine 2 from the transmission 3 for traveling, and 12 in FIG. 2 is the engine 2 via the PTO device 4. This is a hydraulic pump that is driven to rotate. The hydraulic pump 12 drives the actuator 5 (5a, 5b) by a hydraulic valve 14. The actuator 5 is either the hydraulic motor 5a or the hydraulic cylinder 5b, and the hydraulic motor 5a or the hydraulic cylinder 5b of the actuator 5 performs work such as lifting materials or excavating.

  In the present invention, as shown in FIG. 1, an electric motor 11 is driven from an external power source (external power) 10. When this electric motor 11 is used, the engine 2 is stopped. The electric motor 11 turns on and off the switching clutch 13 to drive and stop the hydraulic pump 12. Of course, in this case, the PTO device 4 for power extraction is not used, the hydraulic pump 12 is driven by the electric motor 11, and the hydraulic valve 14 is operated to operate a hydraulic motor 5a or a hydraulic cylinder 5b which is a kind of the actuator 5. (Radial piston motor) is driven to lift the material with the crane 6 of the crane vehicle 1. In this case, since the electric motor 11 mounted on the crane vehicle 1 is used as a drive source for work, the surroundings are quiet, and the engine 2 is not driven, so that no exhaust gas or odor is generated.

  When the hydraulic motor 5a and the hydraulic cylinder 5b are used as the actuator 5, the power source 10 is the driving source of the electric motor 11 for assembling several gear trains to increase the driving torque and lifting the material, and the operation is also quiet. . In addition, the electric motor is not driven by a battery or the like, and the weight is not increased, and the fuel consumption is not increased, so that an energy saving measure can be taken.

  The hydraulic pump 12 can select an appropriate pump (for example, gear pump, vane pump, axial piston pump, radial piston pump, etc.) according to the purpose of use, and the actuator 5 can be selected accordingly. You can choose the best one.

  The present invention is configured as described above. Of course, depending on the location, the hydraulic pump 13 is driven from the engine 2 and the transmission 3 via the PTO device 4 and the hydraulic pump 12 via the hydraulic valve, as in the past. Then, actuators such as the hydraulic motor 5a and the hydraulic cylinder 5b may be driven. In other words, in the present invention, the hydraulic pump can be driven to work from either the engine 2 or the power source 10 depending on the operating location.

  Electric motors that use a power source that is less likely to generate noise during nighttime and holidays can be used on special work vehicles that used to work with a noise-prone engine. It can be widely used in the construction and civil engineering industries without any problems.

1 Crane truck 2 Engine (diesel, gasoline)
DESCRIPTION OF SYMBOLS 3 Transmission 4 PTO apparatus 5 Actuator 5a Hydraulic motor 5b Hydraulic cylinder 6 Crane 10 Power supply 11 Electric motor 12 Hydraulic pump 13 Switching clutch 14 Hydraulic valve

Claims (3)

  A movement characterized by comprising a traveling engine, a PTO device, a hydraulic pump driven by taking out electricity from an external power source, an actuator driven by the hydraulic pump, and a control means for controlling the actuator and the pump. System for internal combustion engine and external power supply   The combined system of an internal combustion machine and an external power supply for a mobile work vehicle according to claim 1, wherein the actuator is a hydraulic motor. The combined system of an internal combustion engine and an external power supply for a mobile work vehicle according to claim 1, wherein the actuator is a hydraulic cylinder.

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