JPH0752192Y2 - Front work equipment hydraulic hose piping - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a hydraulic hose used for a front working machine such as a power shovel, and particularly to a hydraulic hose piping for the front working machine in consideration of durability and maintainability. .

(Prior Art) In a conventional hydraulic power shovel or the like, for example, as shown in FIG. 3, a tube 13 is used in a part from the direction switching valve 11 to the front working machine 12 at a part of the direction switching valve 11 side. However, the one connected by one hydraulic hose 14 is used. It should be noted that FIG. 3 shows only one hydraulic hose and the other hoses are omitted for easy understanding of the structure.

(Problems to be solved by the invention) However, in such a hydraulic hose 14, there is no risk of damage to the engine room 15 or a part inside the floor frame 16 where the driver's cab or the like is installed, because it is not exposed to the outside. Since the part of the boom and the like that extends to the cylinder 17 of the front working machine 12 is exposed to the outside, there is spillage of earth and sand due to excavation work, etc. May be damaged by scandal.

Therefore, if it is damaged, it must be replaced, but if it is too long because it is one hose, the replacement work will be troublesome, and the part on the floor frame side that is not damaged will also have to be replaced. It is extremely uneconomical.

Even if such damage occurs, no measures other than replacement have been taken.

In view of this, the present invention provides a hydraulic hose pipe for a front working machine that prevents damage to a hydraulic hose used as a pipe for a throne work machine such as a power shovel and facilitates replacement in the case of damage. The purpose of the present invention is to eliminate the drawbacks of the prior art.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a directional control valve provided in an engine room at the rear of a vehicle body, a floor frame,
In the hydraulic hose leading to the front working machine, a maintenance hole is provided on the upper surface of the floor frame, a block for a hose joint is provided facing the maintenance hole, and a resin hose is provided between the directional control valve and the block. Each of the front working machines is attached by a wear resistant hose.

(Operation) According to the above configuration, the hydraulic hose on the exposed portion from the floor frame to the front working machine is a wear-resistant hose, so damage can be prevented, and even if it is damaged, the maintenance hose can be removed from the maintenance hole between the front working machine and the block. The damaged hose can be replaced easily.

(Embodiment) Hereinafter, the present invention will be described with reference to an embodiment shown in FIGS.

The hydraulic hose piping of the front working machine according to the present invention is a hydraulic hose from the direction switching valve 2 provided in the engine room 1 at the rear of the vehicle body to the front working machine 4 through the flow frame 3 to the front working machine 4. And a block 6 for a hose joint is provided facing the maintenance hole 5, and a resin hose 7 is provided between the directional switching valve 2 and the block 6 so that the area between the block 6 and the front working machine 4 is resistant. The hose 8 is attached by an abradable hose 8.

The present embodiment shows a case where it is applied to a power shovel, and therefore the engine room 1 is provided in the rear part of the upper swing body.

The engine room 1 is provided with an engine 9, and the engine 9 is provided with multiple directional switching valves 2 via brackets (not shown).

A maintenance hole 5 is formed in the upper surface of the floor frame 3, and a lid 10 that can be opened and closed by a hinge or the like is provided in the maintenance hole 5 so that the maintenance hole 5 is always closed.

A block 6 is provided directly below the maintenance hole 5 in the floor frame 3.

This block 6 is provided with a plurality of parallel holes penetrating forward and backward, and female threads for attaching a hydraulic hose are provided at the front and rear ends of the holes.

The front working machine 4 is supported rotatably in a horizontal direction by a pin portion 11 provided vertically to the floor frame 3.

The front working machine 4 is provided with a boom, an arm, a head such as each cylinder of a bucket, and a total of six hydraulic hoses extending to the bottom side, and the direction switching 2 to the block 6 are external. Six resin hoses 7, which are relatively low in strength because they have no possibility of coming into contact with, that is, inexpensive, are connected.

On the other hand, the block 6 and each cylinder are connected to each other by the wear resistant hose 8 having external force resistance so that the direction switching valve 2 and the front working machine 4 are communicated via the block 6. become.

Therefore, both hoses 7 and 8 are extremely easily attached and detached.

Furthermore, when replacing the wear resistant hose 8 due to wear, the lid 10 of the floor frame 3 may be opened and the mouthpiece attached to the block 6 may be detached from the maintenance hole 5.

Although the present invention has been described with reference to the case of the power shovel in the embodiment, it is needless to say that the present invention is not limited to the power shovel and can be applied to a similar front working machine.

(Effects of the Invention) As described above, the present invention provides a maintenance hose on the upper surface of the floor frame in the hydraulic hose from the direction switching valve provided in the engine room at the rear of the vehicle body to the front working machine via the floor frame. A hose joint block was provided facing the hole, and a resin hose was installed between the directional control valve and the block, and a wear-resistant hose was installed between the block and the front working machine. The reliability can be improved as compared with the conventional one.

Further, even if the hose is damaged by use, the hose exposed to the outside can be removed from the block portion and replaced with a new hose by using the maintenance hole, so that the replacement man-hour is shortened and the maintainability is also improved.

[Brief description of drawings]

1 and 2 show a hydraulic hose pipe for a front working machine according to the present invention. FIG. 1 is a plan view, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a conventional front working machine hose. It is a side view of piping. 1 ... Engine room, 2 ... Direction switching valve, 3 ... Flower frame, 4 ... Front working machine, 5 ... Maintenance hole, 6
…… Block, 7 …… Resin hose, 8 …… Abrasion resistant hose.

Claims (1)

[Scope of utility model registration request] 1. A hydraulic hose from a directional control valve provided in an engine room at the rear of a vehicle body to a front working machine via a floor frame. A maintenance hole is provided on an upper surface of the floor frame, and a block for a hose joint is provided facing the maintenance hole. A hydraulic hose pipe for a front working machine, wherein a resin hose is provided between the directional control valve and the block, and a wear resistant hose is installed between the block and the front working machine.