JP2528908Y2 - Oiling device for telescopic booms of aerial vehicles or mobile cranes - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for feeding oil to a telescopic boom of an aerial work vehicle or a mobile crane.

[0002]

2. Description of the Related Art As shown in FIGS. 4 and 5, an aerial work vehicle or a movable crane has a base end mounted between a left and right brackets 2 and 2 erected on a swivel base 1 so as to be able to move up and down. It has a boom 3. Reference numeral 10 denotes an up / down cylinder of the telescopic boom 3 interposed between the brackets 2 and 2 and the telescopic boom 3.

Each of the brackets 2 and 2 is provided with a base end portion of the telescopic boom 3 for supporting a force acting from the base end portion of the telescopic boom 3 through the fulcrum fulcrum pin 8 during a crane operation or a high place operation in a lightweight structure. An inner plate 2a disposed close to the side plate 3a, an outer plate 2b disposed at a predetermined distance from the inner plate 2a, and an edge connecting between the respective edges of the inner plate 2a and the outer plate 2b. It is composed of a hollow bracket having a connecting member 2c.

A hydraulic actuator 4 such as a telescopic cylinder is mounted on the telescopic boom 3 side, and the hydraulic pressure for driving the hydraulic enchator 4 is supplied from the swivel base 1 to the telescopic boom 3 via an oil feeder. It is being refueled. This oil feeder is composed of flexible hydraulic hoses 5 and 5 disposed between the bracket 2 of the swivel base 1 and the base end of the telescopic boom 3.

[0005] Hydraulic hoses 5, 5 in a conventional oil feeder
Is disposed between the connectors 6 and 6 on the side of the swivel platform 1 and the connectors 7 and 7 disposed at appropriate positions outside the base end of the telescopic boom 3 and passes outside the brackets 2 and 2. When it is driven, it follows the bending movement to ensure the supply and discharge of hydraulic pressure between the swivel 1 side and the telescopic boom 3 side.

[0006] In the oil feeding device for the telescopic boom of the conventional aerial work vehicle or the mobile crane thus configured, the hydraulic hoses 5 and 5 pass outside the brackets 2 and 2 and the hydraulic hoses 5 and 5 are used. Since the outward movement of the brackets 2 and 2 is not restricted, there is a problem that the hydraulic hoses 5 and 5 that swing in the left and right directions when the telescopic boom 3 is driven up and down are easily damaged.

[0007]

The present invention relates to a telescopic boom in which the hydraulic hoses 5, 5 do not pass outside the brackets 2, 2 and the swing of the hydraulic hoses 5, 5 in the left-right direction is restricted. 3 is provided to prevent the hydraulic hoses 5 and 5 from being damaged as much as possible.

[0008]

In order to achieve the above-mentioned object, an oil feeding device for a telescopic boom of an aerial work vehicle or a mobile crane according to the present invention is configured as follows. It has a telescopic boom that is mounted between a pair of left and right brackets with its base end erected on a swivel base, and is mounted on the telescopic boom side. An aerial work vehicle or a mobile crane configured to be supplied from the swivel table side via a flexible hydraulic hose disposed between base ends of a telescopic boom, wherein the left and right brackets are respectively provided. An inner plate, an outer plate arranged at a predetermined interval with respect to the inner plate, and a hollow bracket formed of an edge connecting member connecting between the inner plate and each edge of the outer plate. An opening is formed by cutting off a part of the upper edge connecting member of at least one of the left and right brackets, and the hydraulic hose is connected to the swivel base and the telescopic bracket via the hollow portion of the bracket and the opening. Oil feeding device to the telescopic boom Aerial or mobile crane, characterized in that it is arranged between the proximal end of the arm.

[0009]

In the oil feeder of the present invention having the above-described structure, at least one of the edge connecting members of the existing hollow brackets 2, 2 is cut out to provide an opening therein, and the opening and the bracket are provided. The hydraulic hoses 5, 5 are arranged after passing through the hollow portions of the hydraulic hoses 5, 5 so that the hydraulic hoses 5, 5 do not pass outside the brackets 2, 2, and the portion of the hydraulic hoses 5, 5 located in the bracket in the left-right direction. To the hydraulic hose 5 when the telescopic boom 3 is driven up and down.
5 is prevented.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an oil supply device for a telescopic boom of an aerial work vehicle and a mobile crane according to the present invention will be described below with reference to FIGS. 4 and 5 used in the description of the conventional oil feeder have the same meaning except for the passages of the hydraulic hoses 5 and 5 and the positions of the connectors 6 and 6 on the swivel 1 side in the following description. Invite.

In FIGS. 1 to 3, at least one of the left and right brackets 2 is partially cut out above an edge connecting member 2c, and a hollow in the bracket 2 is formed therein. An opening 11 leading to the portion is formed. In this embodiment, the opening 11 is arranged so as to be located in front of the fulcrum fulcrum pin 8.

The connectors 6 and 6 on the swivel base 1 are arranged below the inner plate 2a of the bracket 2. One end of each of the hydraulic hoses 5, 5 is connected to the connectors 6, 6, and a hose passage hole 1 provided in a lower portion of the inner plate 2 a of the bracket 2 is formed therefrom.
2. The other end of the bracket 2 is connected to the connectors 7 on the telescopic boom 3 through the opening 11 and the other end.

In this embodiment, the connectors 6, 6 are arranged below the inner plate 2a of the bracket 2, but the position of the connectors 6, 6 is not limited to this. A control port of a hydraulic control valve (not shown) disposed at an appropriate position of the swivel base 1 may be a connector for connecting one end of the hydraulic hoses 5, 5. In the case of supplying / discharging the control oil to / from the revolving base 1 via the joint, the port on the revolving base side of the rotary joint may be a connector for connecting one end of the hydraulic hoses 5, 5.

The oil supply device for the telescopic boom according to the present invention is essentially cut out at a part above the edge connecting member 2c of at least one of the left and right brackets 2 and 2, and has an opening 11 there. The hydraulic hoses 5, 5 need only be disposed between the swivel base 1 and the base end of the telescopic boom 3 via the hollow portion of the bracket 2 and the opening 11.

Next, the operation will be described. The swing of the portions of the hydraulic hoses 5 and 5 located in the bracket 2 in the left-right direction is as follows.
Since the inner and outer plates 2a and 2b of the bracket 2 prevent the hydraulic hoses 5, 5 from moving outward of the left and right brackets 2 when the telescopic boom 3 is driven up and down. Also, brackets 2 for hydraulic hoses 5 and 5
Is protected from outside by the bracket 2. Therefore, damage to the hydraulic hoses 5, 5 can be prevented as much as possible.

In the above description, the hydraulic hoses 5, 5
Has been described on one of the brackets 2, but it goes without saying that hydraulic hoses 5, 5 may be provided on each of the left and right brackets 2, 2.

[0017]

[Effect of the Invention] The oil supply device for the telescopic boom of the aerial work vehicle or the mobile crane according to the present invention configured as described above has an extremely simple structure, but the hydraulic pressure is applied to the outside of the bracket 2 like the conventional one. Since the hoses 5 and 5 do not pass and the portions of the hydraulic hoses 5 and 5 located in the bracket are prevented from swinging in the left-right direction, the hydraulic hoses 5 and 5 are damaged when the telescopic boom 3 is driven up and down. Is practically effective.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a device for feeding oil to a telescopic boom of an aerial work vehicle or a mobile crane according to the present invention.

FIG. 2 is a rear view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is an explanatory view of a conventional oil feeding device for a telescopic boom of an aerial work vehicle or a mobile crane.

FIG. 5 is a plan view of FIG. 4;

[Explanation of symbols]

 Reference Signs List 1 swivel base 2, 2 bracket 2a inner plate 2b outer plate 2c edge connecting member 3 telescopic boom 4 hydraulic actuator 5, 5 hydraulic hose 6, 6 connector 7, 7 connector 8 undulating fulcrum pin 10 undulating cylinder 11 opening 12 hose passage hole

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location B66F 11/04 B66F 11/04

Claims (1)

(57) [Scope of request for utility model registration] 1. A hydraulic fluid for driving a hydraulic actuator mounted on a telescopic boom side, the telescopic boom being mounted between a pair of left and right brackets having its base end erected on a swivel base and mounted on the telescopic boom side. An aerial work vehicle or a mobile crane configured to be supplied from a swivel side via a flexible hydraulic hose disposed between the bracket and a base end of a telescopic boom. A hollow bracket comprising an inner plate, an outer plate arranged at a predetermined distance from the inner plate, and an edge connecting member connecting the inner plate and each edge of the outer plate. In the above structure, at least one of the left and right brackets is cut off at an upper part of the edge connecting member and an opening is provided therein, and the hydraulic hose is swung through the hollow portion of the bracket and the opening. An oil feeder for a telescopic boom of an aerial work vehicle or a mobile crane, which is disposed between a turntable and a base end of the telescopic boom.