JP2855501B2 - Work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a hydraulic shovel, and more particularly to a working machine having an improved mounting structure for mounting a pressure oil supply / discharge pipe to a working device.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show a hydraulic shovel as an example of a working machine according to the prior art.

[0003] In the drawings, reference numeral 1 denotes a lower traveling body, and 2 denotes an upper revolving body 2 rotatably provided on the lower traveling body 1. The upper revolving body 2 and the lower traveling body 1 constitute a working machine body. The upper swing body 2 is provided with a machine room 3 in which an engine, a radiator, a hydraulic pump and the like (all not shown) are housed, and a counter weight 4.

[0004] As shown in Fig. 4, reference numeral 5 denotes an operator's cab provided on the front left side of the upper revolving superstructure 2, and in the operator's cab 5, various operation levers, pedals, a driver's seat and the like (all shown in the figure). The operation lever and the like are operated to enable traveling, turning, drive control of the working device 6 described later, and the like.

[0005] Reference numeral 6 denotes a working device provided at the front center of the upper revolving unit 2 so as to be able to move up and down. The working device 6 is roughly constituted by a boom 7, an arm 8, and a bucket 9 as a working tool. The base end of the arm 7 is connected to the upper revolving unit 2, the base end of the arm 8 is connected to the distal end of the boom 7, and the bucket 9 is connected to the distal end of the arm 8.

On the other hand, a boom cylinder 10 is provided between the upper swing body 2 and the boom 7, an arm cylinder 11 is provided between the boom 7 and the arm 8, and a bucket cylinder 12 is provided between the arm 8 and the bucket 9. Pressure oil from the hydraulic pump is supplied / discharged to a rod-side oil chamber and a bottom-side oil chamber (both not shown) defined in each of the cylinders 10, 11, 12. The working device 6 is operated by extending and contracting the rods 10A, 11A, and 12A of the 10, 11, and 12 rods.

Reference numerals 13 denote first supply / discharge pipes for supplying / discharging pressure oil to / from the rod-side oil chamber and the bottom-side oil chamber of the arm cylinder 11; , And extends along the longitudinal direction, and a plurality of fixtures 14, 14,.
And mounted. The supply / discharge piping 13 has a base end connected to a hydraulic pump or a tank via a control valve (not shown) or the like, and a tip end connected to the arm cylinder 11.

Reference numerals 15 and 15 denote second supply / discharge pipes for supplying / discharging pressure oil to / from the rod-side oil chamber and the bottom-side oil chamber of the bucket cylinder 12, respectively. And is positioned and attached by each fixture 14.

Numerals 16 and 16 denote pipe sections which are disposed between the boom 7 and the arm 8 and constitute a part of each of the supply / discharge pipes 15, and each of the pipe sections 16 corresponds to each of the second supply / discharge pipes. The flexible hoses 17, 17 to be described later, and a plurality of connections for connecting the flexible hoses 17 to the distal end of each supply / discharge pipe 15 and the bucket cylinder 12. And a member (not shown).

Reference numerals 17 and 17 denote flexible hoses provided between the boom 7 and the arm 8 and provided in each of the piping sections 16. Each of the flexible hoses 17 rotates the arm 8 with respect to the boom 7. It is flexible so that it can bend freely with movement, and is formed with the required slack. One of the flexible hoses 17 is arranged on the left side of each side of the boom 7 and the arm 8, and the other is arranged on the right side of each side of the boom 7 and the arm 8. further,
The proximal end of each flexible hose 17 is connected to the distal end of each supply / discharge pipe 15, and the distal end is connected to the bucket cylinder 12 via a connection member.

In the hydraulic excavator thus configured,
When excavation work such as earth and sand is performed, the boom 7 and the arm 8 are raised and lowered by the boom cylinder 10 and the arm cylinder 11, and the bucket 9 is rotated by the bucket cylinder 12 to excavate the earth and sand. .

[0012]

By the way, in the above-mentioned prior art, the flexible hose 17 of each second supply / discharge pipe 15 is provided.
Of these, the other flexible hose 17 located on the right side is disposed on the side opposite to the boom 7 and the arm 8 with respect to the cab 5, so the other flexible hose 17 is The arm 8 does not enter the field of view from the cab 5 because it is in the way. That is, the operator sitting in the driver's seat in the driver's cab 5 cannot see the flexible hose 17 on the right side from the driver's cab 5, for example, during excavation work in a narrow place such as an urban area or a forest area. In addition, there is a problem that the other flexible hose 17 is damaged by hitting or catching the other flexible hose 17 against an obstacle such as a surrounding building or tree.

Further, even if the other flexible hose 17 is broken during the operation, the flexible hose 17 does not enter the field of view of the operator in the operator's cab 5, so the worker continues working without noticing the damage. Thus, there is a problem that the damage may cause a serious accident.

On the other hand, as another conventional technique, each supply / discharge pipe 1
There is also known a working machine in which the breakage of piping and the like is prevented by installing the flexible hose 5 and each flexible hose 17 inside the boom 7 and the arm 8. However, in this case, holes for inserting the flexible hoses 17 and the like must be formed in the boom 7 and the arm 8, which not only reduces the strength of the boom 7 and the arm 8, but also causes maintenance and inspection. However, there is a problem that it becomes complicated and extra work is required.

The present invention has been made in view of the above-described problems of the prior art, and allows a plurality of flexible hoses provided in a pipe portion of each supply / discharge pipe connected to a bucket cylinder to be confirmed from the operator cab. It is another object of the present invention to provide a working machine capable of preventing breakage of each flexible hose during work.

[0016]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a working machine body having an operator's cab, and a boom cylinder provided on the working machine body so as to be able to move up and down .
Boom you operate, Amushi provided at the distal end of the boom
The arm operated by the cylinder and the tip of the arm
A working apparatus provided with a bucket actuated by provided a bucket cylinder, in order to supply and discharge the pressure oil to each sheet Linda the working device, a plurality of supply and discharge disposed extends in the length direction of the working device In a working machine composed of pipes, a supply / discharge pipe connected to a bucket cylinder among the respective supply / discharge pipes has a pipe portion disposed between the boom and the arm ,
Piping section structure <br/> form by a plurality of flexible hose Tsu also the required slack to allow rotation of the arm relative to the boom, each of said all flexible hoses the cab So that the flexible hoses are located on the side of the boom and the side of the arm that is closer to the driver's cab so as to be within the field of view. It adopts a configuration that is characterized by having done.

[0017]

According to the above construction, it is connected to the bucket cylinder.
And a plurality of flexible hose which is provided in the piping of the supply and discharge pipes all
It is possible to confirm from the operator's cab and to perform the work while monitoring the flexible hoses so as not to contact surrounding obstacles during the work.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiments, the same components as those of the above-described conventional technology are denoted by the same reference numerals, and description thereof will be omitted.

In the drawing, reference numeral 21 denotes a bucket cylinder provided between the arm 8 and the bucket 9 according to the present embodiment,
The bucket cylinder 21 is formed in substantially the same manner as the bucket cylinder 12 of the prior art, and has a rod-side oil chamber and a bottom-side oil chamber (both not shown) defined therein. Although the rod 21A expands and contracts by rotating the bucket 9 with respect to the arm 8 by supplying and discharging the fluid, each of the flexible hoses 26 described later to which the pressure oil is supplied and discharged is connected to the bucket cylinder 21. Are connected to the left side through connection members.

Reference numerals 22 and 23 denote second supply / discharge pipes for supplying and discharging pressurized oil to and from the rod-side oil chamber and the bottom-side oil chamber of the bucket cylinder 21, respectively. Like the second supply / discharge pipe 15, it is provided on the upper surface side of the boom 7 along the longitudinal direction, and is positioned and attached by fixtures 24, 24,.

Here, as shown in FIG. 2, the one supply / discharge pipe 22 is located on the left side of the upper surface of the boom 7 and is provided along the extending direction from the base end side to the tip end side of the boom 7.
The other supply / discharge pipe 23 is located on the right side of the upper surface of the boom 7 on the base end side of the boom 7, and is gently bent toward the left side at a bent portion 23 </ b> A at the middle portion in the longitudinal direction of the boom 7, On the side, it is provided along the extension direction of the boom 7 so as to be located on the same left side as the one supply / discharge pipe 22.

Numerals 25, 25 are disposed between the boom 7 and the arm 8, and indicate piping sections which constitute a part of the supply / discharge pipes 22, 23, and each of the pipe sections 25 is the second supply / discharge pipe. Piping 22,
The flexible hoses 26, 26, which will be described later, are connected to the respective distal ends of the supply / discharge pipes 22, 23 and the bucket cylinder 21. And a connecting member (not shown) for connection.

Reference numerals 26, 26 denote flexible hoses which are located between the boom 7 and the arm 8 and are provided in each of the piping portions 25. All of the flexible hoses 26 are connected to the boom 7 and the arm. /> left arm 8, the left side of the cab 5 side of each side of the right
It is disposed on the surface and provided with a required slack so as to allow the rotation of the arm 8 with respect to the boom 7. The proximal end of each flexible hose 26 is connected to the supply / discharge pipes 22 and 2.
3, the front end side is connected to the bucket cylinder 21 via a connecting member (not shown).

The hydraulic shovel according to the present embodiment has the above-described configuration, and its operation is substantially the same as that of the prior art. When excavating work such as earth and sand, the boom cylinder 10 and the arm cylinder 11 control the boom 7. The arm 9 is rotated, and the bucket 9 is rotated by the bucket cylinder 21 to excavate earth and sand.

In this embodiment, however, the second supply / discharge pipe 2
Since each of the two flexible hoses 26 constituting each of the piping portions 25 is arranged at a position on the left side of the boom 7 and the arm 8 at a position that can be confirmed from the cab 5,
Both flexible hoses 26 can be confirmed from the operator's cab 5 and excavation work or the like can be performed while constantly monitoring.

Thus, according to the present embodiment, the operator sitting in the driver's seat of the driver's cab 5 can monitor both of the two flexible hoses 26 from the driver's seat, for example, in an urban area or a forest area. During excavation work in a narrow place, it is possible to prevent the flexible hoses 26 from hitting or being caught by obstacles such as surrounding buildings and trees. In addition, the work device 6 and the like can be operated while monitoring each flexible hose 26 so as not to come into contact with an obstacle or the like, so that excavation work or the like can be performed with ease.

Further, when each flexible hose 26 is damaged due to an unexpected accident or the like during the operation, the damaged portion can be immediately confirmed, so that a secondary major accident that may occur by continuing the operation without noticing the damage is possible. Can be prevented beforehand.

On the other hand, the arrangement of the flexible hoses 26 in the respective pipe sections 25 of the second supply / discharge pipes 22 and 23 can be easily changed from the conventional arrangement, and the change operation and the like can be easily performed.

Also, in comparison with other conventional techniques in which the flexible hoses 26 and the like are provided inside the boom 7 and the arm 8, in the present embodiment, the boom 7 and the arm 8 are provided with through holes and the like. Since there is no need to drill, the strength of the boom 7 and the arm 8 can be maintained as it is.

In the above-described embodiment, since the cab 5 is disposed on the left side of the working device 6, the cabs 5 are provided in the respective pipe portions 25 of the second supply / discharge pipes 22 and 23. The hose 26 is arranged on the left side of the side of the boom 7 and the arm 8. However, in the case of a hydraulic shovel in which the cab 5 is located on the right side with respect to the working device 6, the flexible hoses 26 are connected to the boom 7 and the arm 8. Arranged on the right side of the side of the arm 8, the cab 5
What is necessary is just to be in view of from.

In the above embodiment, two second supply / discharge pipes 22 and 23 having a flexible hose 26 are provided in the pipe section 25. However, in the present invention, the arm 8 and the bucket 9 are provided with a plurality of cylinders. It may be used for a large-sized hydraulic excavator attached, and even in this case, all the flexible hoses 26 provided in the pipe portion 25 of the second supply / discharge pipe are connected to the boom 7 and the arm 8 by the respective side surfaces. What is necessary is just to arrange on the side surface located in the driver's cab 5 side.

Further, in the above-described embodiment, the hydraulic excavator has been described as an example of the working machine, but the present invention can be applied to a backhoe having a working device such as a boom and an arm.

[0033]

As described above, according to the present invention,
Of the supply and discharge pipes connected to the bucket cylinder,
All plurality of flexible hose which is provided in a pipe portion which is disposed between the arm and the arm, to fall within the field of view from OPERATION chamber, of each side of the boom and the arm, the Since it is located on the side that is the driver's cab side, all of the flexible hoses can be confirmed from the driver's cab, and each flexible hose comes into contact with surrounding obstacles during work such as excavation work Can be prevented. Therefore, there is no slack between the boom and the arm.
Thus, the breakage of each flexible hose can be prevented, and the safety can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a working device of a hydraulic shovel according to an embodiment.

FIG. 2 is an overall view of the hydraulic excavator according to the embodiment when viewed from above.

FIG. 3 is an overall perspective view showing a conventional hydraulic excavator.

FIG. 4 is an overall view of a conventional hydraulic excavator as viewed from above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 5 Operator's cab 6 Working device 7 Boom 8 Arm 9 Bucket 22, 23 Supply / discharge piping 25 Piping part 26 Flexible hose

Continuation of the front page (56) References: JP-A-59-69257 (JP, U) Photograph of the specification and drawings attached to the application for Jpn. 2-46733 (Jpn. Microfilm (JP, U) Japanese Patent Application No. 2-10971 (Japanese Utility Model Application No. 3-103351) Microfilm (JP, U) (58) that photographed the contents of the specification and drawings attached to the application. Field (Int.Cl. ⁶ , DB name) E02F 9/00 E02F 3/36 F16L 11/00

Claims (1)

(57) [Claims] 1. A work machine main body having an operator's cab and a boom cylinder provided on the work machine main body so as to be able to move up and down.
Boom you dynamic, Amushiri provided at the distal end of the boom
Setting the tip of the arm and the arm is actuated by Sunda
A working apparatus provided with a bucket actuated by vignetting bucket cylinder, in order to supply and discharge the pressure oil to each sheet Linda the working device, a plurality of supply and discharge disposed extends in the length direction of the working device in working machine consisting of a pipe, before Symbol supply connected to the bucket cylinder of the supply and discharge pipes
Discharge pipe has a pipe portion which is disposed between the boom and the arm, a plurality of flexible hose is the piping section Tsu also the required slack to allow rotation of the arm relative to the boom Organization <br/> form, as the respective all flexible hose enters the field of view from the cab, the cab side of each side of the respective flexible hose the boom and arm A working machine characterized in that it is arranged to be located on a side surface to be used.