JPS5838061Y2 - Center joint attachment structure to the swivel base of a work vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a structure in which a center joint for piping extending between the sides is attached to a swivel base provided on a traveling machine base.

In the above structure, the flange that is integrally connected to the center joint is generally attached to the swivel base by inserting the center joint into a hole drilled in the swivel base up to the cylindrical part, but conventionally, Before mounting the swivel base on the traveling machine base, the center joint should be placed near its mounting position, the piping work to the center joint must be done, and then the swivel base must be mounted on the traveling machine base. The first method of attaching the center joint to the swivel base is to place the swivel base on the traveling machine base, place the center joint near the mounting position and perform piping work, and then There is a second method of attaching the center joint to the swivel base, but since the flange has a larger diameter than the hole and cannot pass through, there are the following problems.

In other words, in the first method described above, the piping work between the center joint and the traveling machine base is carried out before the swivel base is placed on the traveling machine base, so the piping is done in a state where there is a large work space above. The center joint can be installed on the swivel base after the swivel base is placed on the traveling machine base. Inevitably, the flange of the center joint is located below the swivel base, and the flange must be attached to the swivel base by bolting from below the swivel base. The work had to be done in a cramped space.

Furthermore, in the second method described above, the flange of the center joint is positioned above the swivel base, and the work for attaching the center joint to the swivel base can be easily done from above the swivel base. Piping work to the center joint must be done with the swivel table mounted on the traveling machine stand, making the piping work in a very narrow space.

In short, in any conventional case, it was necessary to crawl under the swivel base and install from below, which made the assembly work extremely difficult.

In view of the above points, the present invention is designed so that all of the piping work between the center joint and the traveling machine base, and the installation work between the swivel base, the traveling machine base, and the center joint can be performed from the upper side of the swivel base. To easily and quickly assemble a center joint to a swivel base in a car.

That is, in the above-mentioned structure for mounting a center joint on a swivel base of a work vehicle, the present invention provides a structure in which holes of different diameters are bored in the swivel base, and the longitudinal direction of the center joint with respect to the different diameter holes is set as the axis. In order to enable the center joint to be switched between a passable state and a non-passable state with respect to the different diameter hole by relative rotation, the outer periphery of the center joint is provided with substantially the same shape as the different diameter hole. in a state in which the center joint cannot pass downwardly through the different diameter hole with the different diameter outer peripheral portion being passed upwardly through the different diameter hole, the center joint It is characterized in that the point is assembled to the swivel base.

In other words, in the wide working space before installing the swivel base,
Piping between the center joint and the traveling machine base can be easily done, and then the center joint can be passed through holes of different diameters on the swivel base, and the center joint and the swivel base can be rotated relative to each other, which is a very simple operation. As a result, the center joint can be made impossible to pass through the swivel base, and the center joint can be mounted from above with the center joint mounted on the swivel base, making it possible to perform piping work between the center joint and the traveling machine base. Now, all of the installation work between the swivel base, traveling machine base, and center joint can be done from above the swivel base without having to crawl under the swivel base, making it extremely easy to assemble the center joint onto the swivel base. I was able to do it easily and quickly.

Particularly, the unique effect of this invention is that when the center joint is installed on the swivel table after passing it above the swivel table, the easy installation due to the wide working space makes it possible to perform the work from above the swivel table. The installation work is made possible by a very simple operation of relative rotation between the center joint and the swivel base, and good installation of the center joint makes it easy to secure a large work space necessary for the work. That's what happened.

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

Traveling machine platform 2 equipped with crawler type traveling devices 1 on the left and right sides
The swivel base 3 is installed to allow full rotation, and the driver's seat 4 is installed on the swivel base 3.
At the same time, a base 5 is connected to the base 5 so as to be freely pivotable around the vertical axis 4, and a bendable and extensible working arm 6 is pivotally connected to the base 5 so as to be vertically swingable. A packet 7 is pivotally connected to the tip so that it can swing up and down, and the traveling device 1, the swivel table 3, the working arm 6, and the packet 7 are hydraulically driven, thereby making it possible to dig ditches. It consists of a fully rotating backhoe for ground excavation work.

The swivel base 3 is attached to the traveling machine base 2 via a swivel race 8, and is configured to supply pressure oil from the swivel base 3 to the traveling device 1 via a center joint 9.

To assemble the center joint 9 to the swivel base 3,
The center joint 9 and the traveling device 1 are connected to the flexible tube 10...
. . . After piping, the swivel base 3 can be attached to the traveling machine base 2, and the center joint 9 can be attached to the swivel base 3 from above.

That is, as shown in FIG. 3, a hole 11 for inserting the center joint 9 drilled in the swivel base 3 is formed in a cross shape, and a hole 11 is formed in the shape of a cross in the middle of the center joint 9. The flange 12, which is an example of the different diameter outer peripheral portion 12, is formed in a shape corresponding to the hole 11 in a plan view, so that
After piping the center joint 9 and the traveling device 1,
The flange 12 and the swivel base 3 are placed in a predetermined relative posture so that the center joint 9 can pass through the hole 11 and the flange 12 can be pulled out above the swivel base 3.

(See A in Figure 3) Then, attach the swivel base 3 to the traveling machine base 2, and rotate the center joint 9 so that the hole 11
By changing the relative posture of the flange 12 to
The flange 12 is mounted on the swivel base 3 and fixed with bolts 13, and the center joint 9 is attached to the swivel base 3.

(See Figure 3.) To change the relative posture of the center joint 9 with respect to the hole 11 of the swivel base 3, the center joint 9 is If you cannot rotate the center joint 9, you can just rotate the swivel base 3. Also, if you rotate the swivel base 3 to change the relative posture like this, the center joint 9 and the traveling The swivel base 3 is also used for assembly with the machine base 2.
This has the advantage that it can be done from above before assembling.

Incidentally, as in the above embodiment, the cross-shaped hole 11 and the flange 1
The shape is not limited to 2, but may be elliptical or polygonal.
In short, it is sufficient if the flange 12 is configured to have different diameters so that by changing the relative posture of the flange 12 with respect to the hole 11, the flange 12 can be switched between a state in which it can pass through the hole 11 and a state in which it cannot pass through it.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the structure for mounting a center joint on a swivel base of a working vehicle according to the present invention, and FIG. 1 is an overall side view of the working vehicle, FIG. 3A and 3B are plan views of essential parts for explaining the mode of operation. 2... Traveling machine base, 3... Swivel base, 9.
... Center joint, 11 ... Hole,
12...Different diameter outer circumference part.

Claims (1)

[Scope of utility model registration request] It has a structure in which a center joint 9 for piping extending between both tongues 2 and 3 is attached to a swivel base 3 provided on the traveling machine base 2, and the swivel base 3 is bored with a different diameter (Lll).
By relative rotation about the longitudinal direction of the center joint 9 with respect to the different diameter hole 11, the center joint 9 can be switched between a passable state and a nonpassable state with respect to the different diameter hole 11. A different diameter outer circumferential portion 12 having substantially the same shape as the different diameter hole 11 is formed on the outer periphery of the center joint 9, and the different diameter outer circumferential portion 12 is formed on the outer circumference of the center joint 9.
The center joint 9 is assembled to the swivel base in a state in which the center joint 9 cannot pass downwardly through the different diameter hole 11 in a state where the center joint 9 is passed upwardly relative to the hole 11. Center joint attachment structure to the swivel base of a work vehicle.