JPH089233Y2 - Installation of multiple switching valves with changeable operation patterns - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a pilot pressure control valve for connecting a directional switching valve for supplying pressure oil to a working machine actuator of a hydraulic construction machine or the like, which is connected to a pilot pressure control valve. The present invention relates to the installation of a plurality of switching valves, which can be connected in a replaceable manner by using a pressure hose and whose operation pattern can be changed.

(Prior Art) Conventionally, when operating a work machine of a construction machine such as the one described above, for each work machine, for example, in a power shovel, a boom, an arm, a bucket, and one for operation of turning, respectively.
A total of four manual levers were provided near the driver's seat, but it is easy to make mistakes if the number of levers is large, and it is necessary to take up a large installation area. In recent years, at least two levers have been provided. The method of using a pair of one-lever systems, which can be operated by moving them in two directions of forward and backward and left and right, has been adopted.

(Problems to be solved by the invention) However, at present, the pattern of the arrangement of the operation lever is uniquely determined by each manufacturer due to the structural relationship.

For example, when the first lever is used to raise / lower the boom and the left / right operations are used to excavate and dump the bucket, it cannot be said that each manufacturer is the same. The left / right operation may be left / right turning, and the second left / right operation may be bucket excavation / dumping, which is not necessarily unified.

Therefore, the user has to use the machines of the makers having different operation patterns by the same operator, which causes an operation feeling to be deteriorated and workability to be deteriorated, resulting in an erroneous operation, which is extremely dangerous.

For this reason, it is necessary for the manufacturer side to manufacture the operation pattern according to the user's preference.

As a countermeasure against such changes in the operation pattern when using a pilot pressure control valve, a pilot switching valve is provided in the middle of the pilot circuit from the pilot pressure control valve to the left and right ends of the directional switching valve. Although it is appropriate to switch the pilot pressure, there is a drawback that the pilot switching valve must be newly installed and the cost becomes high.

It is also conceivable to provide a block for concentrating each hose for the pilot pressure control valve in one place in the pilot circuit and connect the hoses at the mouthpiece part to change the hose to suit the operation pattern. In this case also, there is a drawback that the cost becomes high because a new block is required.

In view of this, the present invention provides the installation of a plurality of changeover valves capable of changing the operation pattern, which is capable of easily responding to the change of the operation pattern and without requiring a new device or large-scale parts. The purpose was to eliminate the drawbacks of technology.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a plurality of pilot pressures for switching the discharge oil of a hydraulic pump in an engine room such as a hydraulic power shovel having an openable engine bonnet. In addition to installing an operation type directional valve,
Either one of the left and right pilot pressure hose connection ports of the pilot pressure operated directional control valve is extended to the other side connection port, and the left and right pilot pressure hose connection ports are aligned in the same direction plane. It is characterized in that a plurality of pilot pressure hoses can be connected in a replacement manner.

(Operation) According to the above configuration, each pilot pressure hose connection port connected to the left and right ends of each directional control valve is extended to the other connection port on either the left or right side and is in the same direction plane. Since the hose connected to the left and right ends of one directional control valve are removed and connected to the left and right ends of the other directional control valve, the operation pattern can be changed by a slight rotation of the hose because they are arranged all together. Easy to change.

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

According to the present invention, a plurality of changeover valves capable of changing the operation pattern are installed in the engine room 1 such as a hydraulic power shovel having the engine bonnets 2 and 3 which can be opened and closed. Directional switching valve 5,6,
7 and 8 are installed, and pilot pressure operation type directional control valves 5, 6, 7, 8 have left and right pilot pressure hoses 9 ₁ , 9 ₂ , 9
One of the connection ports of ₃ , 9 ₄ , ... 9 ₈ is extended to the connection port of the other side, and the connection ports of the left and right pilot pressure hoses are arranged in the same direction in the plane, and a plurality of pilot ports are arranged. The pressure hose can be connected in a replacement manner.

That is, for example, as shown in FIG.
Of the left and right ends 8 ₁ and 8 ₂ on which the pilot pressure of ₁ acts, the right end 8 ₁ is a connection port by screwing with the hose 9,
The left end _82, by attaching the auxiliary pipe 10 having an appropriate length which has a connection port by screwing the hose 9 is made to close both the connection port on the tip. And the other directional valves 5,
The same applies to 6,7.

Pilot pressure pipes 11 ₁ , 11 ₂ , 11 ₃ , 11 ₄ , ... 11 ₈ of a plurality of pilot pressure control valves (A and B in the embodiment) provided along the lower side of a driver's seat frame (not shown) are bundled. hand,
It is clamped by the clamp member 12, and from this clamp position, the left and right ends 5 of the plurality of directional control valves 5, 6, 7, 8 respectively.
Pilot hoses 9 ₁ , 9 ₂ , 9 ₃ , 9 ₄ , ..., 9 ₈ leading to ₁ , 5 ₂ , 6 ₁ , 6 ₂ , 7 ₁ , 7 ₂ , 8 ₁ , and 8 ₂ are provided.

Each of these hoses has such a length that it can be exchange-connected at the left and right ends of one directional control valve by rotating in the radial direction and can be connected to the other directional control valves that are close to each other.

The engine 13 has four body frames 14 in the front, rear, left and right.
It is attached to the flywheel housing 16 of the engine 13 by a rubber mount 15 at the top so as not to interfere with the hydraulic pump 4 provided at the center of the engine.
A bracket 18 using a plurality of 17 is provided.

Directional change valves 5, 6, 7, 8 for guiding the oil discharged from the hydraulic pump 4 to the actuators are attached to the bracket 18 either integrally or separately.

A cabin where the front side of the engine room 1 is a driver's cab
It is 19 and the engine Bonn 2 is installed at the boundary.

A bonnet 3 is provided on the rear surface of the engine room 1 so as to be openable and closable by a hinge 20 provided on the upper portion. As a result, the engine 13, the hydraulic pump 4, and the directional control valves 5, 6,
Directional changeover valve 5,6,
When installing and removing the pilot pressure hoses 9 ₁ , 9 ₂ , ..., 9 ₈ at the left and right ends of 7, 8, open the bonnet 3 in the direction of the arrow.

As shown in FIG. 3, the operation pattern in the present embodiment is such that the pilot pressure control valve A has a boom for forward / backward operation and a bucket for left / right operation. Therefore, when operated forward, the right end of the direction switching valve 5 (in the vehicle body direction). Then it becomes the rear end) 5 ₁
Since the pilot pressure of the pilot pressure hose 9 ₁ acts to switch the directional control valve 5, the boom is raised, and when operated backward, the left end of the directional control valve 5 (the front end in the vehicle body direction) 5 ₂ is used for pilot pressure. since the pilot pressure of the hose 9 ₂ switches the directional control valve 5 acts boom becomes lowered.

Similarly Since the pilot pressure in the pilot pressure hose 9 ₃ at the right end 6 ₁ is operated to the left direction switching valve 6 switches the directional control valve 6 acts bucket becomes drilling, directional control valve is operated to the right in the opposite since the pilot pressure in the pilot pressure hose 9 ₄ the left end 6 ₂ 6 switches the directional control valve 6 acts bucket becomes dump.

The pilot pressure control valve B is swung forward and backward, and the arm is used left and right. Therefore, when the pilot pressure control valve B is operated forward, the pilot pressure of the pilot pressure hose 9 ₇ acts on the right end 8 ₁ of the directional control valve 8, and the directional control valve Since 8 is switched, turning turns to the right. Conversely, if it is operated backward, the left end of the directional control valve 8
8 _second turning because switching the directional control valve 8 pilot pressure in the pilot pressure hose 9 ₈ acts on becomes left turn.

Likewise the arms because the pilot pressure in the pilot pressure hose 9 ₅ to the right end ₇₁ of the operating to the right direction switching valve 7 switches the directional control valve 7 acts becomes drilling, directional control valve is operated to the left in the opposite Pilot pressure hose at left end 7 ₂ of 7
9 because the pilot pressure of ₆ switches the directional control valve 7 acts arm becomes dump.

Each pilot pressure hose 9 ₁ In this example,
Each directional valve 5, 6, 7, to adjust the length of 9 ₂ , ..., 9 ₈
Auxiliary pipe 1 near the right end of the 8 left and right ends
A connection port of 0 is always provided at the left end.

In such an operation pattern, if the user desires to make the pilot pressure control valve A swing with the boom instead of the boom and bucket, the bucket of the control valve A is replaced with the swing of the control valve B for control. The valve B needs to be an arm and a bucket. In this case, the control valves A and B can be left as they are, and the connection can be exchanged by connecting only the pilot pressure hoses.

That is, the pilot pressure hoses Remove (bucket digging) 9 ₃ from the direction change-over 6, is rotated in a radial direction of the clamping position as a fulcrum connected to the right end 8 ₁ of the directional control valve 8, likewise hose (bucket dumping) 9 ₄ for direction switching valve 6
From is rotated radially removable connected via an auxiliary pipe 10 at the left end 8 _second directional control valve 8.

Hose (right turn) with completely similar removal and installation
9 ₇ at the right end 6 ₁ of the directional control valve 6, by connecting each hose (left turn) 9 ₈ through the auxiliary pipe 10 at the left end 6 _2, the turning and operating the pilot pressure control valve A to the right and left,
Further, when the pilot pressure control valve B is operated back and forth, the operation pattern can be changed so that the bucket operates.

Further, in this embodiment, the boom is raised when operated forward, and lowered when operated backward, but it is desired to change the operation pattern so that it is lowered when operated forward and raised when operated backward. In this case, remove the pilot pressure hoses 9 ₁ and 9 ₂ from the directional control valve 5 and rotate 9 ₁ through the auxiliary pipe 10 to the left end 5 ₂ and 9 ₂ to the right end 5 ₁ in the radial direction. Just connect.

In such an installation, the lengths of the pilot pressure hoses 9 ₁ , 9 ₂ , ..., 9 ₈ are shown as extremely long and short in order to avoid duplication in FIG. Therefore, it is possible to perform replacement mounting by rotating in the radial direction.

The above is an example of changing the operation pattern, and it goes without saying that various changes can be made not only by applying the boom, arm, bucket, and turning, but also by using other working machines.

Further, although the pilot pressure pipe and the hose clamp are shown at one place in the embodiment, a plurality of clamps may be used depending on the length of the pipe and the hose.

(Effect of the Invention) As described above, according to the present invention, the operation pattern can be changed simply by opening the hood of the engine room and connecting the pilot pressure hoses connected to the left and right ends of the directional control valve installed in the room. Since it can be performed very easily, it is not necessary to provide a block or a switching valve as in the conventional case, and an excellent effect can be achieved with a simple structure.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of an engine room equipped with a plurality of changeover valves capable of changing operation patterns according to the present invention, FIG. 2 is a rear view of FIG. 1, and FIG. It is a circuit explanatory view showing a pilot pressure hose which connects a pilot pressure control valve and a direction switching valve. 1 ... engine room, 2, 3 ... engine bonnet,
4 …… hydraulic pump, 5,6,7,8 …… direction switching valve, 9 ₁・ 9 ₂ , 9
₃ , ~ 9 ₈ ... Pilot pressure hose, 10 ... Auxiliary pipe, A, B ... Pilot pressure control valve.

Claims (1)

[Scope of utility model registration request] 1. A plurality of pilot pressure operated directional control valves for switching the discharge oil of a hydraulic pump are installed in an engine room such as a hydraulic power shovel having an openable / closable engine bonnet and a pilot pressure operated type. One of the left and right pilot pressure hose connection ports of the directional control valve is extended to the other side connection port, and the left and right pilot pressure hose connection ports are aligned in the same direction plane, and multiple pilot pressure hose connections are arranged. Installation of multiple switching valves with changeable operation patterns, characterized in that hoses can be connected in a replaceable manner.