JPH0762680A - Hydraulic pipe structure of extension for hydraulic drive work arm - Google Patents

Abstract

PURPOSE:To prevent a hydraulic pipe provided on an extension from contacting an obstruction and being damaged during work. CONSTITUTION:In a pipe structure for providing hydraulic pipe on an extension 8 between an arm 6 and an attachment 9, when the extension 8 which is driven to rotate by a hydraulic cylinder 7 is extended to the end of the arm 6 axially supported at the end of a boom and a variety of attachments 9 for working which is hydraulically driven are mounted to the end of the extension 8, hydraulic hose connection joints 15, 16 are provided on the outside wall surface on the proximal side of the extension 8 so as to protrude from the wall surface. Hydraulic pipes connected to the joints 15, 16 are stored in the interior of the extension 8 and extended to the front end side of the extension 8 and joints 17, 18 for hydraulic hoses connected to the attachment 9 are provided in the hydraulic pipes on the front end side of the extension 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piping structure for hydraulic piping provided in an extension for attaching various work attachments by extending the extension to the tip of a hydraulically driven work arm.

[0002]

2. Description of the Related Art In a power shovel, a hydraulically driven move is installed on a traveling body so as to be able to rotate in the front-rear direction, and an arm that is hydraulically rotated is attached to the tip of this move. A bucket that is hydraulically driven is attached to the tip of the.

In such a power shovel, the bucket is removed, the extension 8 which is an extension arm is connected to the tip of the arm 6 as shown in FIG. 5, and the tip of the extension 8 is, for example, a pile driver. By attaching an attachment 9 such as a hydraulic Bambro,
Can be used as a hydraulic working machine. In the example of FIG. 5, a hydraulic vibro is attached.

In this extension 8, when a hydraulic pipe is connected between the tip of the arm 6 and the work attachment 9, a pipe 20 is provided along both side walls of the extension 8.

[0005]

As described above, conventionally, since the hydraulic pipe 20 is provided along both side wall surfaces of the extension 8, the pipe 20 is exposed to the outside and is attached to the tip portion of the extension 8. If the attachment 9 to be attached is a hydraulic vibro, the pipe 20 comes into contact with a structure or the like close to the work site during the work of driving the sheet pile or the H-section steel, and the pipe 20 is damaged.

The present invention has been proposed in order to solve the problems of the conventional technique, and the hydraulic pipe provided in the extension will not come into contact with other objects during work and be damaged. The purpose is to provide a piping structure.

[0007]

In order to achieve this object, the present invention provides a move, which is driven by a hydraulic cylinder, on a turntable provided on a traveling machine body so as to be rotatable in the front-rear direction. An arm driven by a hydraulic cylinder is rotatably pivoted at the tip of the arm, and an extension rotatably driven by the hydraulic cylinder is extended to the tip of the arm for hydraulically driven work at the tip of the extension. When installing various attachments, in the piping structure for performing hydraulic piping for the extension between the arm and the attachment, a hydraulic hose connection joint is projected on the outer wall surface on the base side of the extension, and the hydraulic piping connected to this joint is connected. Store inside the extension and pipe up to the front of the extension. In the hydraulic piping as structure in which a joint for hydraulic hose connected to the attachment side.

[0008]

According to the above construction, since the hydraulic pipe is housed inside the extension for piping, the hydraulic pipe for the extension does not come into contact with the obstacle when the attachment is attached to the tip of the extension to perform work. .

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an overall configuration diagram in which an extension having a hydraulic piping structure according to the present invention is connected to a hydraulically driven work arm. In this figure, for example, a swivel base 2 is installed on a traveling machine body 1 that travels on an endless track, and a move 4 which is rotationally driven in the front-rear direction by a hydraulic cylinder 3 is provided on the swivel base 2. An arm 6 that is driven to rotate by a hydraulic cylinder 5 is provided at the tip of the move 4.
The arm 6 is pivotally mounted, and an extension extension 8 having a substantially L shape which is rotationally driven by a hydraulic cylinder 7 is attached to a tip end portion of the arm 6. A hydraulic vibro, which is a pile driver in this example, is attached to the tip of the extension 8 as a hydraulically driven work attachment 9.

The hydraulic pipe from the hydraulic source installed on the traveling machine body 1 to the work attachment 9 is a high pressure feed pipe 1.
0 and the return pipe 11 are piped along both side walls of the move 4 and the arm 6, and the attachment 9 is attached from the tip of the arm 6.
The extension 8 in between has a piping accommodated inside the extension 8 by the hydraulic piping structure according to the present invention.

Next, the piping structure of the extension 8 will be described in detail with reference to FIGS. 2 to 4. The substantially L-shaped extension 8 is formed in a box shape by the side plates 12, the bottom plate 13 and the reinforcing construction plate 14, and the reinforcing groove plate 14 is formed.
The both side plates 12, 12 project from this in the shape of a brim. Arm 6
A joint 15 to which a hydraulic hose 10a for the feed pipe extending from the arm 6 is connected and a joint to which a hydraulic hose 11a for the return pipe is connected to the outer surfaces of both side plates on the side of the base of the extension 8 about which the tip of the is pivoted. 16 are projected.

Each hydraulic pipe 1 arranged along the reinforcing groove plate 14 so as to be housed inside the extension 8
The base portions of 0b and 11b are connected to the joints 15 and 16, respectively, and the hydraulic pipes 10b and 11b extending to the front surface of the extension 8 on the distal end side are connected to the work attachment 9 side for feeding and returning. Joints 17 and 18 to which the respective hydraulic hoses 10c and 11c are connected are provided in a protruding manner. Since the hydraulic pipes 10b and 11b are provided inside the extension 8 as described above, an accident such that an obstacle accidentally comes into contact with the hydraulic pipes 10b and 11b during work is prevented.

[0013]

As described above, according to the present invention, since the hydraulic pipe is provided inside the extension, an obstacle is accidentally brought into contact with the hydraulic pipe of the extension during work as in the conventional work. Accidents that damage the hydraulic piping do not occur and safety during work can be secured.

[Brief description of drawings]

FIG. 1 is a side view showing the overall configuration of a move on a traveling machine body, an arm at its tip, an extension connected to the arm, and a work attachment.

FIG. 2 is a side view showing a hydraulic piping structure according to the present invention in an extension.

FIG. 3 is a front view showing a hydraulic piping structure of an extension.

4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a side view showing a conventional hydraulic piping structure in an extension.

[Explanation of symbols]

 1 traveling machine 2 swivel base 3, 5, 7 hydraulic cylinder 4 move 6 arm 8 extension 9 work attachment 10, 10b hydraulic pipe for feeding 11, 11b hydraulic pipe for returning 10a, 10c hydraulic hose for feeding 11a, 11c Return hydraulic hose 12 Side plate 13 Bottom plate 14 Reinforcement groove plate 15, 16, 17, 18 Joint

Claims (1)

[Claims] 1. A move, which is driven by a hydraulic cylinder, is rotatably mounted in the front-rear direction on a swivel base provided on the traveling machine body, and an arm, which is hydraulically driven by the cylinder, is rotatable at the tip of the move. The extension that is pivotally driven by the hydraulic cylinder is extended to the tip of this arm, and various attachments for hydraulically driven work are attached to the tip of this extension. In the piping structure for performing hydraulic piping, a hydraulic hose connection joint is projected on the outer wall surface on the base side of the extension, and the hydraulic piping connected to this joint is stored inside the extension, and the front end side of the extension The hydraulic pressure connected to the attachment side to the hydraulic piping on the front side. Hydraulic pipe structure of the extension hydraulically driven working arm, characterized in that a joint for over scan.