JP3258225B2 - Aerial work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerial work vehicle in which a movable vehicle body is provided with a boom or the like capable of operating up and down by using a battery as a drive source.

[0002]

2. Description of the Related Art In order to move a worker to a desired high place, a driving cabin is provided in front of a vehicle body as a high-altitude working vehicle having a work table provided at the tip of a boom that can be raised and lowered and extended and retractable. In some cases, a carrier is arranged behind the vehicle body. A swivel is pivotally mounted on the platform of the aerial work vehicle, and an extendable boom is arranged on the swivel so as to be able to move up and down. Then, a worktable on which a worker can be mounted is provided at the tip of the telescopic boom, and the worker is moved to a desired height by performing up / down, telescopic, and turning operations of the boom.

In such an aerial work vehicle, usually,
The telescopic boom is arranged diagonally to the center axis of the vehicle so that the telescopic boom can be as long as possible, so that the telescopic boom and the work table are within the vehicle length and width. It is designed to fit in the road to ensure safety when driving on the road. Therefore, in the retracted state of the working device such as the boom, the vehicle center of gravity is shifted from the center of the vehicle body in the left or right direction, and the body is rotated in the left or right direction by extending or turning the boom. Becomes larger than the moment due to the fulcrum reaction force, thereby reducing the stability of the vehicle body. Therefore, not only may the stability during road running be impaired, but also the stability of the vehicle body during operation of the boom will be reduced, and the function as an aerial work vehicle will be reduced, such as narrowing the turning range of the boom. It could be. In order to solve this problem, counterweights are conventionally provided at various parts of the vehicle body to balance the weight of the entire vehicle when the working device is stored.

[0004]

By the way, in such an aerial work vehicle, a force required for driving the working device is obtained by supplying hydraulic oil to a cylinder or a hydraulic motor. For this purpose, it is necessary to drive a hydraulic pump or open and close a control valve by controlling a hydraulic circuit, and a power source is required as a drive source for this. However, since a battery for driving the vehicle alone is extremely insufficient as a power source for this purpose, a battery having a larger capacity is mounted on the vehicle body.

[0005] In the case of an aerial work vehicle equipped with such a battery drive, the battery body as a power source is heavy, and when the battery is configured as a single case and installed in the vehicle body, If not installed in the center of the vehicle body, the weight balance of the vehicle body will be worsened, and the capacity of the housing will be large, so that the distribution of the installation space on the vehicle body becomes a problem. For this reason, as shown at 20 in FIG. 3, a method has been adopted in which the housing is divided into two housings having the same shape and the same weight, and installed symmetrically on the body of the aerial work vehicle.

[0006] However, even when the battery housings having the same weight and the same shape are arranged symmetrically with respect to the center line of the vehicle body, the center of gravity of the vehicle body is biased in the first place due to the arrangement of the working device mounted on the vehicle body. Because it ’s happening,
Further, it is necessary to add a counter weight (CW in FIG. 3) in order to balance the weight, and eventually, the vehicle weight becomes unnecessarily heavy. For this reason, waste is greatly increased, the cost is increased, and the running fuel efficiency is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of such a situation. In an aerial work vehicle in which a battery drive is installed, batteries, which are heavy objects, have different weights.
Divided into the above chassis, each battery is installed at a different position on the vehicle body and used as a counterweight, efficiently ensuring the balance of the vehicle weight in the retracted state of the work equipment, and improving the stability when traveling on the road It is intended to increase the space and effectively use the space of the vehicle body.

[0008]

In order to achieve the above-mentioned object, according to the present invention, there is provided an aerial platform vehicle having a battery-operated operating device, comprising: In the retracted state of the working device, a battery having a large weight is arranged as a whole on the vehicle body on the side that opposes the rotational moment generated in the left or right direction with respect to the vehicle body central axis of the aerial work vehicle, A battery having a small weight as a whole is arranged on the vehicle body on the side that increases the moment. In the storage state of the working device, each battery is effectively used as a counterweight to balance the vehicle weight as a whole.

[0009]

Preferred embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 2, the aerial work vehicle 10 is configured such that an operation cabin C is provided at a front portion of a vehicle body 11 and a carrier 11a is provided. A swivel table 12 that can freely perform horizontal swivel operation with respect to the vehicle body 11 is mounted on the carrier 11a. Also,
A boom 13, which is configured to be telescopically expandable and contractible, is pivotally mounted on the upper portion of the swivel base 12 so that the boom 13 can be raised and lowered by the expansion and contraction operation of an up and down cylinder 15.

At the tip of the boom 13, a vertical post 16 is provided which is always maintained in a vertical state by a leveling mechanism irrespective of the elevation angle of the boom 13. An arm member 17 is attached to the vertical post 16 so as to be able to freely turn horizontally, and a work table 14 on which an operator can be mounted so as to be able to freely turn horizontally is attached to the arm member 17. Then, when working at a high place, the boom 13 is undulated, expanded and contracted as shown by a two-dot chain line in FIG.
By performing the turning operation, the worker who is on the work table 14 can be moved to a desired height. Further, by performing the turning operation of the arm member 17, it is possible to adjust the position of the work table 14 after moving to a high place.

When the aerial work vehicle 10 completes the work and stores the boom 13 on the vehicle body, as shown in FIG. Position. Then, the arm member 17 is turned to the left with respect to the boom center axis, and the side of the worktable 14 and the boom 1 are moved.
3 is made parallel and the neck is broken. After that, the boom 13 is lowered and the boom 13 and the worktable 14 are positioned on the vehicle body. As a result, the working device is stored within the vehicle length and width of the aerial work vehicle 10, thereby ensuring stability when traveling on a road.

As described above, when the boom operation device is retracted, the boom 13 of the aerial work vehicle 10 is mounted on the vehicle center axis a-.
Not on a. Therefore, the center of gravity of the entire vehicle is also the center axis a of the vehicle.
−a, but on the right side of the vehicle body 11. For this reason, a rotational moment in the right direction with respect to the vehicle central axis acts on the aerial work vehicle 10. Although this moment is balanced by the fulcrum reaction force with the tire on the right side of the vehicle as a fulcrum, the weights of the right and left tires are different, and there is a possibility that the stability during running of the vehicle may be reduced.

In the present invention, in order to balance the weight of the whole work vehicle 10 constructed as described above, as shown in FIG. 1, the boom 13 is stored in the retracted state of the working device (ie, when the vehicle is running). A heavy battery case 20a is installed on the side of the vehicle body (left side with respect to the center axis aa) opposite to the storage position of the boom 13 and the weight is mounted on the side of the vehicle body (the right side of the boom 13) on the storage position side of the boom 13. The battery case 20b having a smaller weight than the battery having a larger weight is disposed. That is, the weight of the entire vehicle is balanced by the weight of the battery. This eliminates the need for a counterweight (CW in FIG. 3) attached to the vehicle body as a side weight, and effectively uses the battery as the counterweight CW.

The position for mounting the battery is not particularly specified, and an empty space may be used. However, in consideration of the convenience of battery charging, replacement, and the effect as a counterweight, the battery may be mounted on the left and right vehicle body. It is desirable to install it facing. Similarly, the battery can be used as a counterweight in the weight balance before and after the vehicle body.

[0015]

As described above, in the aerial vehicle according to the present invention, the heavy battery is divided into two or more housings each having a different weight, and each battery is placed at a different position on the vehicle body. Installed as a counterweight, it is possible to efficiently balance the weight of the vehicle body in the retracted state of the work equipment, and to increase the stability of the aerial work vehicle when traveling on the road, Since the vehicle body weight is not made unnecessarily heavy, it is possible to improve fuel efficiency and the like. Further, the vehicle body space can be effectively used.

[Brief description of the drawings]

FIG. 1 is a top view of an aerial work vehicle according to the present invention.

FIG. 2 is a front view of the aerial work vehicle according to the present invention.

FIG. 3 is a top view of an aerial work vehicle showing a conventional battery arrangement.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Aerial work vehicle 11 Body 12 Turning table 13 Boom 14 Work table 15 Undulating cylinder 20 Battery CW Counterweight

Claims (1)

(57) [Claims] 1. An aerial work vehicle having a battery-driven device, wherein the battery is divided into two or more casings having different weights, and the aerial work vehicle is driven in a running state of the aerial work vehicle. The battery having a heavier weight as a whole is attached to the vehicle body on the side opposing the rotational moment generated in the left or right direction with respect to the vehicle body central axis, and the battery having a lighter weight as a whole is attached to the vehicle body on the side increasing the rotational moment. An aerial work vehicle that is arranged.