JP2013095547A - Drive device for hydraulic pump for high-place work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive device for hydraulic pump for high-place work vehicle that improves a work environment of a worker since combustion gas generated by an engine is not exhausted to a work place by operating a hydraulic pump having been provided by a motor by utilizing the electricity of a battery having a simple structure, mounted on a vehicle, and placed in the vehicle or at the bottom or utilizing external AC electricity, and also can transport moving-person's belongings quietly at night at an apartment house etc., where many residents live by reducing noise to a periphery of the work place by reducing sound generated by the vehicle during work.SOLUTION: There is provided the drive device for hydraulic pump for high-place work vehicle characterized in that a shaft extension part for extending one of a pump driving shaft and a pump driven shaft in a hydraulic pump in one direction is projected on a side face of the hydraulic pump, and the motor driven by external electricity or the electricity of the battery is coupled to the shaft extension part.

Description

  The present invention relates to a device for driving a working hydraulic pump provided in an aerial work vehicle such as a ladder car or a crane car, and more particularly, because combustion gas generated from an engine is not discharged to a work place. The work environment can be improved and the noise generated from the car during the work can be reduced to reduce the noise around the work place. Therefore, it is possible to move moving luggage quietly at night in apartments where many people live. The present invention relates to a drive device for a hydraulic pump for a work vehicle.

  In general, there are ladder trucks, crane trucks, etc., such as outside construction of buildings, installation work of electric wires on telegraph poles, installation work of signs and lighting, maintenance and installation work of structures such as bridges. In addition, it is used for work at a high place or used for moving a structure to a high place.

  The aerial work vehicle is provided with a device for driving a hydraulic pump by using the power of the power extraction device, and a ladder device for a ladder vehicle and a crane device for a crane vehicle are provided by hydraulic pressure output from the hydraulic pump. Such an altitude work implement operates.

  In the case of a ladder car, the hydraulic pump can be driven to extend and retract the ladder of the ladder car and raise and lower the loading platform, and in the case of a crane car, the structure can be raised and lowered. For example, conventionally, a power extraction device for controlling the power of an engine is connected to a hydraulic pump by a drive shaft, and a ladder device such as a ladder car is driven by the hydraulic pressure of the hydraulic pump, which includes a plurality of operation levers. Depending on this, the ladder device is driven and the loading platform is raised and lowered.

  That is, when the ladder device is driven by a plurality of operation levers, it is necessary to increase the output of the hydraulic pump. Therefore, when the wire operated by the operation lever rotates the engine output adjustment lever, the engine output increases. The output of the power extraction device and the drive shaft is increased to increase the output pressure of the hydraulic pump.

  Therefore, conventionally, when the ladder device is driven by a plurality of operation levers, the output pressure of the hydraulic pump is increased, and the ladder device can be operated smoothly.

  However, conventionally, when a device such as a ladder device of an aerial work vehicle is operated, the ladder device is operated in a state where the engine is driven, so that a large noise is generated in the work place due to a change in the engine RPM or the like. In a place where many people live, it was impossible to work with a ladder device of an aerial work platform at night.

  In particular, even when working on an aerial work vehicle in a factory, there is a disadvantage that the working environment of the worker is deteriorated by the soot that is combustion gas of the engine in the sealed factory.

  In order to overcome the disadvantages as described above, in Patent Document 1, conventionally, a hydraulic pump is connected to a drive shaft connected to a vehicle power extraction device, a clutch is provided on the drive shaft, A structure is disclosed in which a power transmission means is provided between a motor to be driven and a drive shaft, and the hydraulic pump is also driven by driving the motor. Thus, the hydraulic pump can be driven without generating noise by driving the motor.

  However, the conventional technology as described above includes an unnecessary component for providing the clutch on the drive shaft in spite of the fact that the power control means provided in the vehicle power extraction device is provided. Although the hydraulic pump can be driven only by the power of the motor by operating the clutch, there is a disadvantage in that the number of components is increased because a separate device for controlling the clutch must be provided.

  Therefore, conventionally, in order to reduce the number of components, as another example, a technique disclosed in Patent Document 2 has been developed by the present applicant. This is because a power extraction device for controlling the output of the engine is provided between the engine and the drive shaft, a hydraulic pump is provided at the end of the drive shaft, and the hydraulic pressure output from the hydraulic pump is operated by an operation lever. In a drive device for a hydraulic pump for an aerial work vehicle that drives an aerial work implement and a wire is connected between the operation lever and the engine output adjustment lever, it is directly or indirectly connected to the hydraulic pump. A motor that drives the variable resistor that is adjusted by an operation lever that operates an aerial work implement to adjust the electricity input to the motor, an auxiliary hydraulic pump that is coupled to the motor, and an auxiliary hydraulic pump A structure including an auxiliary high-pressure hose connected to the outlet and communicating with the high-pressure hose connected to the outlet of the hydraulic pump.

  The prior art as described above can be separately provided with a motor, an auxiliary hydraulic pump, and the like, so that the auxiliary hydraulic pump can be operated by external electricity when working at a high place, so that the operation can be performed quietly.

  However, such a conventional technique has a disadvantage that it is very difficult to connect the high pressure hose and the auxiliary hydraulic hose because the auxiliary hydraulic hose must be connected to the already provided high pressure hose.

JP 2005-329871 A Korean Patent Application Publication No. 10-2009-59193

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to have a simple structure and be mounted on a vehicle so as to be installed inside or at the bottom of the vehicle. By using the electricity of the placed battery or using external AC electricity to operate a hydraulic pump that has already been installed with a motor, the combustion gas generated from the engine is not discharged to the workplace. Because it can reduce the noise around the work place by reducing the sound generated from the car during work, the high place where you can quietly carry your moving luggage at night in an apartment where many people live The present invention provides a drive device for a hydraulic pump for a work vehicle.

  In order to achieve the above object, the present invention provides a hydraulic pump driving device for an aerial work vehicle for driving a hydraulic pump provided in an aerial work vehicle. A hydraulic extension for an aerial work vehicle, characterized in that a shaft extension for extending one of the shafts in one direction is formed, and a motor driven by external electricity or battery electricity is connected to the shaft extension. A pump drive device is provided.

  Also, between one or both of the drive shaft of the power extraction device and the pump drive shaft of the hydraulic pump provided in the aerial work vehicle, and between the motor shaft of the motor and the shaft extension of the hydraulic pump. Provided is a hydraulic pump drive device for an aerial work vehicle characterized by providing a one-way clutch.

  Furthermore, in the present invention, a motor driven by external electricity or battery electricity is provided around the hydraulic pump of the vehicle, and a power transmission means is provided between the motor shaft of the motor and the pump drive shaft of the hydraulic pump. A first one-way clutch that transmits power in one direction from the power transmission means to the pump drive shaft of the hydraulic pump is provided between the pump drive shaft of the hydraulic pump and the power transmission means.

  The drive device for a hydraulic pump for an aerial work vehicle according to the present invention has a simple structure and is installed in a vehicle, mounted in the vehicle, or placed on the bottom of the vehicle, or the electric or external alternating current of the battery. Since the hydraulic pump already installed is operated by the power of the motor driven by electricity, the combustion gas generated from the engine is not discharged to the workplace, which not only improves the work environment of the worker but also deteriorates the health of the worker. Because the cause is reduced and the noise of the motor is low, the noise generated from the surroundings of the workplace can be reduced, especially because moving luggage can be carried quietly at night in apartments where many people live, etc. The band can be easily expanded.

  Further, the present invention provides a first one-way clutch that transmits power in one direction from the drive shaft of the power extractor to the pump drive shaft of the hydraulic pump, so that the drive of the power extractor is driven when the hydraulic pump is driven by the motor. Since the shaft does not rotate, the power loss of the motor can be easily reduced, and the second one-way clutch for transmitting the power in one direction from the motor shaft of the motor to the shaft extension of the hydraulic pump is provided. When the hydraulic pump is driven by this drive shaft, the motor does not rotate and the degree of wear of the bearings in the motor can be reduced, so the life of the motor can be easily extended.

  Further, since the first one-way clutch for transmitting the power in one direction from the power transmission means for transmitting the power of the motor shaft of the motor to the pump drive shaft of the hydraulic pump is provided, the hydraulic pump is driven by the drive shaft of the power extraction device. When the motor does not rotate, the degree of wear of the bearings in the motor can be reduced, so the life of the motor can be extended easily, and the drive shaft of the power extractor is unidirectional from the drive shaft of the hydraulic pump. Since the second one-way clutch for transmitting the power is provided, the drive shaft of the power extraction device does not rotate when the hydraulic pump is driven by the motor, and the power loss of the motor can be easily reduced.

1 is a side view showing an example of an aerial work vehicle to which an embodiment of a hydraulic pump drive device according to the present invention is applied. It is a schematic block diagram which shows an example applied to the embodiment of FIG. 1 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the other example applied to embodiment of FIG. 1 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 1 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 1 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a side view showing an example of an aerial work vehicle to which another embodiment of a drive device for a hydraulic pump according to the present invention is applied. It is a schematic block diagram which shows an example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the other example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention. It is a schematic block diagram which shows the further another example applied to embodiment of FIG. 6 of the drive device of the hydraulic pump for aerial work vehicles by this invention.

  As will be described in detail below, a hydraulic pump driving device for an aerial work vehicle according to the present invention includes a hydraulic pump driving device for an aerial work vehicle that drives a hydraulic pump provided in the aerial work vehicle. A shaft extension that extends one of the pump drive shaft and pump driven shaft in the pump in one direction protrudes from the side of the hydraulic pump, and the motor driven by external electricity or battery electricity is the shaft extension. A motor driven by external electricity or battery electricity is provided around the hydraulic pump of the vehicle, and a power transmission means is provided between the motor shaft of the motor and the pump drive shaft of the hydraulic pump, A first one-way clutch for transmitting power in one direction from the power transmission means to the pump drive shaft of the hydraulic pump includes a pump drive shaft and power transmission means of the hydraulic pump; It is provided between.

  Therefore, the present invention is already provided with the power of a motor that has a simple structure and is installed in a car, mounted in the car, or driven by battery electricity placed on the bottom of the car or external AC electricity. Since the installed hydraulic pump is operated, combustion gas generated from the engine is not discharged to the workplace, which not only improves the work environment of the worker, but also reduces the cause of the deterioration of the worker's health and the sound of the motor Since it is small, noise generated from the vicinity of the work place can be reduced. In particular, since moving luggage can be carried quietly at night in an apartment where many people live, the moving time zone can be easily expanded.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  1 and 2 are drawings showing a ladder vehicle as an example of an aerial work vehicle to which a drive device for a hydraulic pump according to the present invention is applied. The drive device of the present invention is provided in an aerial work vehicle. The hydraulic pump 1 is driven.

  For example, the hydraulic pump 1 is operated by a drive shaft 4 of a power extraction device 3 provided in the engine 2 as in the prior art, and the direction and pressure of the hydraulic pressure flowing out from the hydraulic pump 1 are variable by the operation lever 5. Then, the work implement 6 at a height is operated.

  As one embodiment, in the present invention, a shaft extension portion 11 is provided on the side surface of the hydraulic pump 1 to extend one of the pump drive shaft 1a and the pump driven shaft 1b in the hydraulic pump 1 in one direction. The

  A motor 12 such as a DC motor or an AC motor driven by external electricity or battery electricity is connected to the shaft extension 11.

  The shaft extension portion 11 of the present embodiment is provided on the side surface of the hydraulic pump 1 by extending the pump driven shaft 1b in the hydraulic pump 1 in one direction. It is also possible to extend the pump drive shaft 1a in one direction and project on the side surface of the hydraulic pump 1.

  The drive device for the hydraulic pump for an aerial work vehicle according to the present invention needs to change the power of the motor 12, and thus is interlocked with an operation lever 5 for operating an aerial work implement 6 provided in a conventional vehicle. Alternatively, the variable resistor 7 interlocked with the output adjusting lever 4a of the engine 2 interlocked with the wire 5a connected to the operation lever 5 needs to adjust the electricity applied to the motor 12, and the motor 12 Needless to say, a switch (not shown) for controlling electricity applied to the switch is provided.

  Further, when the hydraulic pump 1 is driven by the motor 12, it is necessary to cut off the power transmission between the engine 2 and the power extractor 3, so that the power extractor 3 is provided with a clutch lever 3a as in the prior art. Needless to say, the power transmission between the engine 2 and the drive shaft 4 of the power extraction device 3 is controlled by the operation of the clutch lever 3a.

As described above, the drive device for the hydraulic pump for an aerial work vehicle according to the present invention can operate the motor 12 in a state where the operation of the engine 2 is stopped, thereby realizing a quiet operation at a high place.
That is, the motor 12 can be operated by a battery provided in the vehicle, a plurality of batteries arranged in the work place, AC electricity provided in the work place, and the like. The pump 1 is operated, and the work implement 6 is operated while the direction and pressure of the hydraulic pressure flowing out from the hydraulic pump 1 are varied by the operation lever 5.

  When using a battery, it is possible to operate the motor 12 while charging the battery by operating the engine 2 in a workplace that is not affected by noise.

  On the other hand, when the hydraulic pump 1 is driven by the driving force of the motor 12, if the drive shaft 4 of the power extraction device 3 rotates, a large load can be generated on the motor 12, and therefore, in this embodiment, as shown in FIG. In addition, a first one-way clutch 13 is provided between the pump drive shaft 1 a of the hydraulic pump 1 and the drive shaft 4 of the power extraction device 3.

  That is, the first one-way clutch 13 can transmit power from the drive shaft 4 of the power extractor 3 to the pump drive shaft 1a of the hydraulic pump 1, but from the pump drive shaft 1a of the hydraulic pump 1 to the power extractor. No power is transmitted to the drive shaft 4.

  For example, although the first one-way clutch 13 is not shown, a plurality of sprags are provided between the inner diameter part and the outer diameter part, and when rotating in one direction of the inner diameter part or the outer diameter part, When the outer diameter portion or the inner diameter portion rotates and rotates in the other direction of the inner diameter portion or the outer diameter portion, the outer diameter portion or the inner diameter portion does not rotate.

  Therefore, in the present invention, when the drive shaft 4 of the power extractor 3 is rotated in one direction, power can be transmitted to the pump drive shaft 1a of the hydraulic pump 1, but only the drive shaft 1a of the hydraulic pump 1 When rotating in the same direction as the drive shaft 4, no power is transmitted to the drive shaft 4 of the power extractor 3, so when the motor 12 drives the hydraulic pump 1, the drive shaft 4 of the power extractor 3 rotates. Without reducing the load on the motor 12.

  On the other hand, if the drive shaft 4 of the power extraction device 3 rotates, the motor 12 rotates, so that the bearings and brushes in the motor 12 wear and the life of the motor 12 can be shortened. As shown in FIG. 4, a second one-way clutch 14 is provided between the shaft extension 11 provided in the hydraulic pump 1 of the present invention and the motor shaft 12 a of the motor 12.

  That is, the second one-way clutch 14 can transmit power from the motor shaft 12 a of the motor 12 to the pump drive shaft 1 a of the hydraulic pump 1, but the motor shaft of the motor 12 from the pump drive shaft 1 a of the hydraulic pump 1. No power is transmitted to 12a.

  Therefore, in the present invention, the hydraulic pump 1 can be driven by driving the motor 12, but when the hydraulic pump 1 is operated by the drive shaft 4 of the power extractor 3, the second one-way clutch 14 is used as the hydraulic pump. It is possible to extend the life of the motor 12 by preventing the rotation of the motor shaft 12a of the motor 12 by preventing power from being transmitted from the one shaft extension 11 to the motor shaft 12a of the motor 12.

  On the other hand, in this embodiment, since it is necessary to prevent unnecessary operation of the motor 12 while reducing the load on the motor 12, the pump drive shaft 1a of the hydraulic pump 1 and the power extraction device 3 are connected as shown in FIG. A first one-way clutch 13 is provided between the drive shaft 4 and a second one-way clutch 14 is provided between the shaft extension 11 provided in the hydraulic pump 1 and the motor shaft 12 a of the motor 12.

  As described above, when the motor 12 is operated, the load on the motor 12 can be reduced by using the first one-way clutch 13 so that the drive shaft 4 of the power extraction device 3 is not driven. When the hydraulic pump 1 is driven by the drive shaft 4 of the apparatus 3, the degree of wear of the motor 12 can be reduced by preventing the motor shaft 12 a of the motor 12 from being driven by using the second one-way clutch 14.

  6 to 12 show another embodiment of the hydraulic pump driving device for an aerial work vehicle according to the present invention. In this embodiment, the pump drive shaft 1a in the hydraulic pump 1 is a motor. 21 to drive directly.

  Similar to the above-described embodiment, in this embodiment, a motor 21 such as a direct current motor or an alternating current motor driven by external electricity or battery electricity is provided around the hydraulic pump 1 of the vehicle. Power transmission means is provided between the shaft and the pump drive shaft 1 a of the hydraulic pump 1.

  In the power transmission means, a first one-way clutch 22 that transmits power in one direction to the pump drive shaft 1a of the hydraulic pump 1 is provided between the pump drive shaft 1a of the hydraulic pump 1 and the power transmission means.

  Here, the power transmission means can use a gear train as shown in FIG. 6 to FIG. 9, can use a chain and a sprocket as shown in FIG. 9 and FIG. As shown in FIG. 12, a pulley and a belt can be used. Although not shown, a pulley and a timing belt can also be used.

  That is, as an example, the power transmission means has a structure in which a driving gear 31 is connected to the motor 21 and the driving gear 31 is meshed with the driven gear 32, and the pump driving shaft 1 a and the driven gear 32 of the hydraulic pump 1 are engaged. The first one-way clutch 22 is provided between the central portion of the first one-way clutch 22 and the first one-way clutch 22.

  Accordingly, the pump drive shaft 1a is rotated by the rotation of the driven gear 32 and the hydraulic pump 1 is operated. Even if the pump drive shaft 1a of the hydraulic pump 1 is rotated by the drive shaft 4 of the power extraction device 3, The motor shaft of the motor 21 is not rotated by the first one-way clutch 22.

  For example, although the first one-way clutch 22 is not shown, the first one-way clutch 22 includes a plurality of sprags between the inner diameter portion and the outer diameter portion, and the outer diameter portion when rotating in one direction of the inner diameter portion or the outer diameter portion. Alternatively, the inner diameter portion rotates, and the outer diameter portion or the inner diameter portion does not rotate when rotating in the other direction of the inner diameter portion or the outer diameter portion.

  Such a drive device for a hydraulic pump for an aerial work vehicle according to the present invention realizes quiet aerial work by operating the motor 21 in a state where the operation of the engine 2 is stopped.

  That is, the motor 21 can be operated by a battery provided in the vehicle, a plurality of batteries arranged in the work place, AC electricity provided in the work place, and the rotational force of the motor 21 is transmitted by the power transmission means. The hydraulic pump 1 is operated, the direction and pressure of the hydraulic pressure flowing out from the hydraulic pump 1 are changed by the operation lever 5, and the aerial work implement 6 is operated.

  When using a battery, in a work place that is not affected by noise, the engine 2 can be operated to apply electricity to the motor 21 while charging the battery with electricity.

  The first one-way clutch 22 can transmit power from the motor shaft of the motor 21 to the pump drive shaft 1 a of the hydraulic pump 1, but power is transmitted from the pump drive shaft 1 a of the hydraulic pump 1 to the motor shaft of the motor 21. Is not transmitted.

  Therefore, in the present invention, the hydraulic pump 1 can be driven by driving the motor 21, but when the hydraulic pump 1 is operated by the drive shaft 4 of the power extractor 3, the first one-way clutch 22 is used as the hydraulic pump. By not transmitting power from one pump drive shaft 1a to the motor shaft of the motor 21, it is possible to extend the life of the motor 21 by preventing unnecessary rotation of the motor shaft of the motor 21.

  On the other hand, when the hydraulic pump 1 is driven by the driving force of the motor 21, if the drive shaft 4 of the power extraction device 3 rotates, a large load can be generated on the motor 21. In this embodiment, as shown in FIG. In addition, the second one-way clutch 23 is provided between the pump drive shaft 1 a of the hydraulic pump 1 and the drive shaft 4 of the power extraction device 3.

  That is, the second one-way clutch 23 can transmit power from the drive shaft 4 of the power extractor 3 to the pump drive shaft 1a of the hydraulic pump 1, but the power extractor from the pump drive shaft 1a of the hydraulic pump 1. No power is transmitted to the drive shaft 4.

  Therefore, in the present invention, power can be transmitted to the pump drive shaft 1a of the hydraulic pump 1 when the drive shaft 4 of the power extraction device 3 is rotated in one direction, but only the pump drive shaft 1a of the hydraulic pump 1 is transmitted. When the motor 21 rotates in the same direction as the drive shaft 4, no power is transmitted to the drive shaft 4 of the power extractor 3, so when the motor 21 drives the hydraulic pump 1, the drive shaft of the power extractor 3 4 does not rotate, and the load on the motor 21 can be reduced.

  On the other hand, in the above-described two embodiments, the power transmission means uses a gear train device, but as shown in FIGS. 9 and 10, it is also possible to use a chain and a sprocket device as the power transmission means.

  That is, the power transmission means has a structure in which the drive sprocket 33 is connected to the motor 21 and the driven sprocket 35 is interlocked with the drive sprocket 33 by the chain 34, and the pump drive shaft 1 a of the hydraulic pump 1 and the driven sprocket 35. The first one-way clutch 22 is provided between the central portion of the first one-way clutch 22 and the first one-way clutch 22.

  Thereby, the pump drive shaft 1a is rotated by the rotation of the driven sprocket 35 and the hydraulic pump 1 is operated. However, even if the pump drive shaft 1a of the hydraulic pump 1 is rotated by the drive shaft 4 of the power extraction device 3, Since the driven sprocket 35 is not rotated by the first one-way clutch 22, the motor 21 is not driven.

  Also in the present embodiment, when the hydraulic pump 1 is driven by the driving force of the motor 21, the drive shaft 4 of the hydraulic pump 1 is not rotated as shown in FIG. A second one-way clutch 23 is provided between the pull-out device 3 and the drive shaft 4.

  On the other hand, as shown in FIGS. 11 and 12, a belt and a pulley can be used as the power transmission means.

  That is, the power transmission means has a structure in which a driving pulley 36 is connected to the motor 21, and a driven pulley 38 is interlocked with the driving pulley 36 by a belt 37, and the pump driving shaft 1 a of the hydraulic pump 1 and the driven pulley 38. The first one-way clutch 22 is provided between the central portion of the first one-way clutch 22 and the first one-way clutch 22.

  Thereby, the pump drive shaft 1a is rotated by the rotation of the driven pulley 38 and the hydraulic pump 1 is operated. However, even if the pump drive shaft 1a of the hydraulic pump 1 is rotated by the drive shaft 4 of the power extraction device 3, Since the driven pulley 38 is not rotated by the first one-way clutch 22, the motor 21 is not driven.

  Also in this embodiment, when the hydraulic pump 1 is driven by the driving force of the motor 21, in order not to rotate the drive shaft 4 of the power extraction device 3, the drive shaft 1a of the hydraulic pump 1 and the power extraction as shown in FIG. A second one-way clutch 23 is provided between the drive shaft 4 of the device 3.

  As described above, the motors 12 and 21 applied to the drive device for the hydraulic pump for an aerial work vehicle according to the present invention are operated by the vehicle battery, the battery disposed in the work place, the external electricity, etc. Can be driven smoothly, and a working tool at a high place such as a ladder device of a ladder vehicle and a crane device of a crane vehicle can be operated smoothly.

  The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that these also belong to the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Hydraulic pump 1a Pump drive shaft 1b Pump driven shaft 2 Engine 3 Power extraction device 3a Clutch lever 4 Drive shaft 5 Operation lever 5a Wire 6 Work tool at high place 7 Variable resistor 11 Axis extension part 12, 21 Motor 12a Motor shaft 13 , 22 First one-way clutch 14, 23 Second one-way clutch 31 Drive gear 32 Driven gear 33 Drive sprocket 34 Chain 35 Driven sprocket 36 Drive pulley 37 Belt 38 Driven pulley

Claims (6)

In a drive device for a hydraulic pump for an aerial work vehicle that drives a hydraulic pump provided in the aerial work vehicle,
A shaft extension that extends one of the pump drive shaft and the pump driven shaft in the hydraulic pump in one direction protrudes from the side surface of the hydraulic pump,
A drive device for a hydraulic pump for an aerial work vehicle, wherein a motor driven by external electricity or battery electricity is connected to the shaft extension.   A first one-way clutch for transmitting power in one direction from a drive shaft of a power extraction device provided in an aerial work vehicle to a pump drive shaft of a hydraulic pump includes: a drive shaft of the power extraction device; a pump drive shaft of the hydraulic pump; The drive device for a hydraulic pump for an aerial work vehicle according to claim 1, wherein the drive device is provided between the two.   The second one-way clutch for transmitting power in one direction from the motor shaft of the motor to the shaft extension of the hydraulic pump is provided between the motor shaft of the motor and the shaft extension of the hydraulic pump. Item 2. A driving device for a hydraulic pump for an aerial work vehicle according to Item 1. A first one-way clutch for transmitting power in one direction from a drive shaft of a power extraction device provided in an aerial work vehicle to a pump drive shaft of a hydraulic pump includes: a drive shaft of the power extraction device; a pump drive shaft of the hydraulic pump; Between
The second one-way clutch for transmitting power in one direction from the motor shaft of the motor to the shaft extension of the hydraulic pump is provided between the motor shaft of the motor and the shaft extension of the hydraulic pump. Item 2. A driving device for a hydraulic pump for an aerial work vehicle according to Item 1. In a drive device for a hydraulic pump for an aerial work vehicle that drives a hydraulic pump provided in the aerial work vehicle,
A motor driven by external electricity or battery electricity is provided around the hydraulic pump of the vehicle, and a power transmission means is provided between the motor shaft of the motor and the pump drive shaft of the hydraulic pump. Driving a hydraulic pump for an aerial work vehicle, characterized in that a first one-way clutch for transmitting power in one direction to a pump drive shaft of a hydraulic pump is provided between the pump drive shaft of the hydraulic pump and power transmission means. apparatus. A second one-way clutch for transmitting power in one direction from a drive shaft of a power extraction device provided in an aerial work vehicle to a pump drive shaft of the hydraulic pump includes a pump drive shaft of the hydraulic pump and a drive shaft of the power extraction device. The hydraulic pump drive device for an aerial work vehicle according to claim 5, wherein the drive device is provided between the two.

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