JPH09227091A - Vehicle for high lift work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability at the time of running on a road by dividing one battery unit for a boom and others into two or more battery boxes of different weights from each other, and disposing a heavier-weight battery onto the vehicle body on the side which is against rotational moment generated during running, and a lighter-weight battery onto the vehicle body on the side which increases rotational moment respectively. SOLUTION: While a boom working device whose boom 13 is pivoted so as to be expandable and derrickable is being stored, the boom 13 is not on the center line a-a of a vehicle, therefore, rotational moment which is rightward to the center line of the works upon a vehicle 10 for high lift work. To take weight balancing for the whole vehicle, a heavier-weight battery box 20a is disposed onto the vehicle side surface (leftward side surface to center a-a) on the opposite side to the storage position of the boom 13, and a lighter-weight battery box 20b onto the vehicle body side surface (rightward side surface) on the opposite side to the above respectively. It is possible to eliminate a counter-weight mounted in a conventional way for weight reduction, and improve stability while the vehicle 10 for high lift work is running on a road.

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 which can be freely actuated by a battery as a drive source.

[0002]

2. Description of the Related Art As an aerial work vehicle in which a work platform is provided at the tip of a boom that can be raised and lowered and extended and retracted in order to move an operator to a desired height, a driving cabin is provided in front of a vehicle body. In addition, there is a structure in which a luggage carrier is arranged behind the vehicle body. A swivel base is pivotally mounted on the loading platform of the aerial work vehicle, and a telescopic boom is movably arranged on the swivel platform. A worktable on which an operator can ride is provided at the tip of the telescopic boom, and the operator is moved to a desired height by performing ups and downs, expansion and contraction of the boom, and a swing operation.

In such an aerial work vehicle, normally,
The telescopic boom is arranged diagonally to the center axis of the vehicle so that the telescopic boom can be secured as long as possible. It is configured so that it will fit within the range to ensure safety when driving on the road. Therefore, when the work device such as the boom is stored, the center of gravity of the vehicle shifts from the center of the vehicle body in either the left or right direction, and the moment that rotates the vehicle body in either the left or right direction by extending or turning the boom. Is greater than the moment due to the fulcrum reaction force, which reduces the stability of the vehicle body. Therefore, not only may the stability of the vehicle be deteriorated when driving on the road, but also the stability of the vehicle body when the boom is activated may be reduced, and the function of the aerial work vehicle may be reduced, such as narrowing the turning range of the boom. It can happen. In order to solve this point, counterweights have conventionally been provided at various places on the vehicle body to balance the weight of the vehicle as a whole when the working device is stored.

[0004]

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

Further, in the case of an aerial work vehicle equipped with such a battery drive, the battery main body as a power source is a heavy object, and when this battery is constructed as one casing and installed in the vehicle body. If it is not installed in the center of the vehicle body, the weight balance of the vehicle will become worse and the capacity of the housing will increase, so that the allocation of the installation space on the vehicle becomes a problem. Therefore, as shown by 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 the housings are installed symmetrically on the vehicle body of an aerial work vehicle.

However, even if the battery housings having the same weight and the same shape are arranged symmetrically with respect to the center line of the vehicle body, however, the center of gravity of the vehicle body is deviated due to the arrangement of the working devices mounted on the vehicle body. From what is happening,
Further, in order to balance the weight, it becomes necessary to add a counter weight (CW in FIG. 3), and eventually, the vehicle body weight becomes unnecessarily heavy. For this reason, the amount of waste is extremely large, the cost is increased, and the traveling fuel efficiency is deteriorated.

The present invention has been made in view of such a situation, and in an aerial work vehicle equipped with a battery drive, the weight of the batteries is different from each other.
It is divided into the above housings, each battery is installed at different positions on the vehicle body and used as a counter weight to efficiently secure the weight balance of the vehicle body when the working equipment is stored and to ensure stability when traveling on the road. The purpose is to increase the space and to effectively use the space of the vehicle body.

[0008]

In order to achieve the above-mentioned object, an aerial work vehicle having a battery-powered work device according to the present invention has a case in which two or more batteries, which are heavy objects, have different weights. In the retracted state of the work device, a battery having a large weight is placed on the vehicle body on the side that resists a rotational moment generated in either the left or right direction with respect to the vehicle body center axis of the aerial work vehicle. A battery having a small weight is arranged on the vehicle body on the side of increasing the moment. Then, when the working device is stored, the respective batteries are effectively used as counter weights to balance the vehicle body 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 includes a vehicle body 11 in which a driving cabin C is arranged and a loading platform 11a is arranged. On the loading platform 11a, a swivel platform 12 which is capable of horizontally swiveling with respect to the vehicle body 11 is attached. Also,
A boom 13 configured to be telescopically extendable and retractable is pivotally mounted on the upper part of the swivel base 12 so that the boom 13 can be extended and retracted by the extension and contraction of a hoisting cylinder 15.

A vertical post 16 is provided at the tip of the boom 13 for constantly maintaining a vertical state by a leveling mechanism regardless of the hoisting angle of the boom 13. An arm member 17 is attached to the vertical post 16 so as to be horizontally swiveled, and a work table 14 on which an operator can ride is attached to the arm member 17 so as to be horizontally swiveled. Then, when working at a high place, as shown by the chain double-dashed line in FIG.
By performing the turning operation, it is possible to move the worker who is on the workbench 14 to a desired height. In addition, by rotating the arm member 17, it is possible to adjust the position of the workbench 14 after moving to a high place.

When such an aerial work vehicle 10 finishes the work and stores the boom 13 on the vehicle body, the boom 13 is slanted to the right above the vehicle center axis aa as shown in FIG. Position in the direction of. Then, the arm member 17 is turned counterclockwise with respect to the boom center axis to move the side surface of the workbench 14 and the boom 1
Make the sides of 3 parallel and break the neck. Then, the boom 13 is laid down to position the boom 13 and the workbench 14 on the vehicle body. As a result, the working device is stored in the vehicle length and the vehicle width of the aerial work vehicle 10 to ensure stability during road traveling.

As described above, when the boom working device is retracted, the boom 13 of the aerial work vehicle 10 has the vehicle center axis a-.
Not on a. Therefore, the center of gravity of the entire vehicle is also the vehicle center axis a.
The position is not on -a but on the vehicle body on the right side of the vehicle body 11. Therefore, the aerial work vehicle 10 is subjected to a rotational moment to the right with respect to the vehicle center axis. This moment is balanced by the fulcrum reaction force with the tire on the right side of the vehicle as the fulcrum, but the weights of the left and right tires are different, which may reduce the stability when the vehicle is running.

In the present invention, in order to balance the weight of the whole vehicle of the aerial work vehicle 10 thus constructed, as shown in FIG. 1, when the working device is stored (that is, when the vehicle is running), the boom 13 is used. The heavy battery housing 20a is installed on the vehicle body side surface (the left side surface with respect to the central axis aa) on the side opposite to the storage position, and the weight is attached to the vehicle body side surface (the right side surface) on the storage position side of the boom 13. A battery housing 20b having a smaller weight than that of a large battery is arranged. That is, the weight of the battery balances the entire vehicle body. Thus, conventionally, the counterweight (CW in FIG. 3) attached to the vehicle body as the side weight is not required, and the battery is effectively used as the counterweight CW.

The battery mounting position is not particularly specified, and an empty space may be used. However, considering the convenience of battery charging and replacement and the effect as a counter weight, the left and right vehicle bodies can be installed. It is desirable to install it facing. Further, also in the weight balance between the front and rear of the vehicle body, the battery can be similarly used as the counter weight.

[0015]

As described above, in the aerial work vehicle according to the present invention, the heavy battery is divided into two or more housings having different weights, and the respective batteries are placed at different positions on the vehicle body. Since it is installed as a counterweight and used as a counterweight, it is possible to efficiently secure the balance of the vehicle body weight in the retracted state of the working device, and to improve the stability of the aerial work vehicle when traveling on the road. Since the vehicle body weight is not increased more than necessary, it is possible to improve fuel efficiency. In addition, the vehicle body space can be effectively used.

[Brief description of drawings]

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

FIG. 2 is a front view of an 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]

 10 work platform 11 vehicle body 12 swivel 13 boom 14 work platform 15 undulating cylinder 20 battery CW counterweight

Claims (1)

[Claims] 1. An aerial work vehicle having a device driven by a battery, wherein the battery is divided into two or more casings having different weights, and the aerial work vehicle is in a traveling state of the aerial work vehicle. Of the vehicle body on the side that resists a rotational moment that occurs in either the left or right direction with respect to the center axis of the vehicle body, and the vehicle body on the side of increasing the rotational moment has the battery of a light weight as a whole. An aerial work vehicle characterized by being placed.