JPS5845334Y2 - Operation part structure of excavation work vehicle - Google Patents

Description

[Detailed description of the invention] The invention consists of operating valves for boom rotation, boom vertical swing, arm swing, and packet rotation, which are arranged side by side with their swing spools being approximately parallel to each other. ,
A state in which four push/pull rod interlocking systems, two systems each of which are interlocked and connected to two levers that can be freely operated in a cross-swing motion, are interlocked and connected to the four sliding spools, respectively. The present invention relates to a structure of an operating part of an excavating vehicle in which the sliding spools are arranged side by side in a parallel direction.

In the above operation structure, the operation style of the levers that make up the four operation valves differs depending on the manufacturer, and if the same operator operates models with different operation styles, the operation feeling will be distorted and work efficiency will be poor. Not only that, but there was also a great risk of erroneous operation.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a simple linkage structure so that even models with different operating modes can be effectively used with the same operating feeling.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

A swivel base 2 is attached to a vehicle body 1 equipped with a crawler traveling device so as to be able to rotate around the vertical axis, and a control section 3 and a driving section 4 are mounted on the swivel base 2. An excavation work device 5 is swingably attached to the excavation work device 5, and an earth removal device 6 is provided on the traveling vehicle body 1 to accommodate an excavation worker.

The excavation work device 5 is constructed by providing a bracket 8 swingable around a vertical axis by a cylinder 7, and connecting a boom 10 with an arm 9 connected to the tip thereof to the bracket 8. Packet 1 at the tip
1, and a cylinder 12 for vertically swinging the boom 10, a cylinder 13 for swinging the arm 9 relative to the boom 10, and a cylinder 14 for rotating the packet 11. be.

Operation valve for boom rotation motor M ■1, operation valve for boom cylinder, arm cylinder, and packet cylinder V2. V3. As shown in FIG. 2, the structure of the operating section for V4 is configured such that the operating section S1. S2. S3. Rod P1 to S4. P2. P3
．． P4 are arranged in parallel and connected to each other, and the rods P1
The valve V3 is connected to the valve V3, the swing valve ■1 is connected to the rod P2, the boom valve ■2 is connected to the rod P3, and the packet valve ■4 is connected to the rod P4 so that the respective spools are parallel to each other. The swivel base 2 is moved by swinging the lever 25 back and forth, and the arm 9 is moved by swinging the lever 25 left and right.
The boom 10 is moved by swinging the second lever 26 back and forth, and the packet 11 is moved by swinging the second lever 26 left and right.
They are designed to be driven individually.

A rotary interlocking shaft 16 for changing the interlocking relationship between the lever 25, 26 and the valve sliding spool can be interposed in the middle of the rod interlocking system.

As shown in FIG. 3, the rotation interlocking shaft 16 is composed of two shafts 17 whose axes are oriented in the direction in which the rod interlocking system is arranged side by side.
．． 18 (bracket)) 19. Equipped rotatably on 19,
The first cylindrical body 21 is placed in the middle part of the first shaft 17, and the second shaft 18
The second and third cylindrical bodies 22 and 23 are respectively fitted onto the outside of the first cylindrical body 21 so as to be relatively rotatable. and second
The cylinder body 22, and a second shaft which is fixedly fixed across the first shaft 17 and the third cylinder body 23, respectively, and has a rod pivotally connected to the arm.
The interlocking tool 24 is fixed to the first shaft 17 and each of the first, second, and third cylindrical bodies 21, 22, and 23.

To change the interlocking system using the rotation interlocking shaft 16 configured as described above, in the rod interlocking system shown in FIG. 4A, the rods P, .
P3 is removed, and as shown in FIG. 24 to the operating valve V2, and the interlocking tool 24 of the third cylinder 23 to the operating valve V2, rod interlocking changes the operation target of the arm 9 and boom 10 by the operating lever 25.26. A system is obtained, and in the interlocking system shown in Figure 4 A,
Rod P3. At the same time as removing P4, the interlocking shaft 16 is reversed, and the interlocking tool 24 of the first cylindrical body 21 is connected to the operation part S2, and the first
The interlocking tool 24 of the shaft 17 is connected to the operating part S4, the interlocking tool 24 of the third cylinder 23 is connected to the operation valve ■1, and the interlocking tool 2 of the second cylinder 22 is connected to the operating part S4.
By pivotally connecting 4 to the operating valve 4,
A rod interlocking system is obtained in which the operation targets of the swivel table 2 and the packet 11 are changed by the operation levers 25 and 26.

Although the boom 10 is caused to rotate by the rotation operation of the rotation base 2, an operation valve for the boom swinging cylinder 7 is provided in place of the rotation valve (1).

Alternatively, a flow path switching valve for the cylinder 7 and the motor M is provided, and the valve V1 is also used to connect the boom 10 to the cylinder 7.
It is also a good idea to oscillate it.

Furthermore, the structure of the rod interlock system using the rotation interlock shaft 16 can be modified in various ways.

In summary, the present invention, in the above-mentioned operation part structure of the excavation work vehicle, has a structure in which the rod interlocking system is arranged in parallel in the middle of the rod interlocking system in order to change the interlocking relationship between the lever and the sliding spool. It is characterized in that the rotation interlocking shaft is provided in a state where the connection relationship with the rod can be changed.

That is, the connected motion of the push-pull rods is converted into rotational motion once in the middle of the interlocking system, the rotational motion is taken out from a different position in the direction in which the rods are arranged side by side, and the rotational motion is converted into the original linear motion. By installing a rotation interlocking shaft in the interlocking system that can change the connection relationship with the rod, such as transmitting the information to the valve spool, when the operation mode is different from the previous operation, By making it possible to adapt it to the previous operating style, and by providing a preparation configuration that allows the operating style to be changed as necessary, the same operating feel can be achieved while ensuring good workability and safety. I am now able to use the model effectively.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the operation part structure of the excavation work vehicle according to the present invention, FIG. 1 is a side view of the excavation work vehicle, FIG. 2 is a schematic perspective view of the operation part structure, and FIG. 3 is a rotationally linked structure. A schematic perspective view of the tool, FIG. 4 A9 and C are explanatory views showing changed states of the interlocking system. 16...Rotation interlocking tool, 25.26...
Lever, P1 to P4...Rod, ■1 to ■4・
・・・・Operation valve.

Claims (1)

[Scope of utility model registration request] Operation valves for boom rotation, boom vertical swing, arm swing, and packet rotation ■1. ■2. V3. ■4,
These sliding spools are arranged side by side in a state that they are almost parallel to each other, and two levers 25.
Four push/pull rod interlocking systems, two systems each of which are interlocked and connected to each of the four sliding spools in a manner that can be operated separately, are separately connected to the four sliding spools, and the sliding spools are arranged in parallel. This is the structure of the operation part of an excavation work vehicle arranged in parallel in the direction, and the rod interlocking system is arranged in parallel in the middle of the rod interlocking system in order to change the interlocking relationship between the lever 25° 26 and the sliding spool. The rotation interlocking shaft 16 is oriented in the direction of the rod P1. P2. P3. An operation part structure for an excavation work vehicle, characterized in that it is provided in a state in which the connection relationship with P4 can be changed.