JPH0715892Y2 - Pivoting work device for work vehicles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a swinging work apparatus for a work vehicle, in which a swinging joint is provided to enable a more detailed adjustment operation.

[Conventional technology]

Conventionally, for work, for example, in a hydraulic excavator, various work is performed by installing a working device at the tip of the arm, but the position of the working device itself is the traveling or turning of the work vehicle, the boom, the arm, the attachment. It could be changed only by the operation of the working cylinder.

[Problems to be solved by the device]

The above-described working device is useful and can perform appropriate work by traveling or turning of the work vehicle, operation of the boom, arm, and attachment operating cylinder, but it is not always sufficient depending on the type of work.

That is, depending on the type of work, there is a work in which the work device needs to be adjusted more finely, and there is work in which the position of the work device itself needs to be slightly adjusted without changing the position of the work device itself. When such an adjusting operation is performed, the operation is difficult with the conventional work device, and the driver is naturally required to have an extremely advanced driving technique.

However, in recent years, it has become difficult to secure a driver having a highly skilled driving skill, and there has been a problem that the above-mentioned work has to rely on human power in many cases.

Therefore, an object of the present invention is to propose a swinging working device for a work vehicle capable of operating and adjusting only a working portion of the working device.

[Means for Solving the Problems]

The present invention has been made in view of the above-mentioned problems, and therefore, the construction of the working device for a working vehicle according to the present invention is such that the boom swings left and right and up and down and the tip of the boom moves up and down. A swinging working device for a working vehicle, which is swingably mounted on a tip of the arm of a working vehicle having an arm swingably supported on a shaft, wherein a shaft portion is provided at the tip of the arm on the side opposite to the mounting side. The supporting body is swingably mounted by the expansion and contraction of the rod of the attachment actuating cylinder, and the working device body is supported by the spherical bush externally fitted to the shaft portion, and is equidistant from the radial center of the shaft portion. Further, at least two hydraulic cylinders are supported on the upper part of the support body so as to be swingable in the direction of the shaft portion, and the tips of the rods of the hydraulic cylinders are pivotally attached to the working apparatus main body. Characterize.

[Action]

According to the present invention, in the working device main body supported by the shaft portion of the support member via the spherical bush, the work device main body is provided on the upper portion of the support member equidistant from the radial center of the shaft member. Since the tips of at least two hydraulic cylinder rods that are swingably supported in the direction are pivotally attached, the work vehicle travels and turns, the boom, the arm, The working device main body can be swung around the support portion by the spherical bush without operating the attachment operating cylinder.

〔Example〕

An embodiment of the present invention is a perspective view showing an entire work vehicle equipped with this working device, a partially cutaway side sectional view of the working device, and a III-III line in FIG. The following description will be given with reference to FIG. 3 of the sectional view and FIG. 4 of the sectional view taken along the line IV-IV of FIG.

That is, reference numeral (1) shown in FIG. 1 indicates a lower structure (1a) having an endless track, an upper structure (1b) supported on the lower structure (1a), and an upper structure (1b). A boom (1c) mounted on one end side so as to be swingable vertically and horizontally,
A hydraulic excavator main body, which is a so-called mini excavator, has an arm (1d) supported at the tip of the boom (1c) so as to be vertically swingable.

And, at the tip of this arm (1d),
The swing cylinder (1e) as an attachment operating cylinder provided in d) was swingably mounted to a swinging work device (10) having the configuration described below for leveling a concrete pouring surface.

As shown in FIGS. 2 to 4, details of the swinging work device (10) are as follows: a free end side of a link (1f) pivotally attached to a tip of a rod of a bucket cylinder (1e) and an arm ( A support body (11) was swingably attached to the tip of 1d). And
The support body (11) has a shaft portion (12) that protrudes when it is not mounted, and a spherical bush (13) is fitted on the shaft portion (12). Further, the spherical bush (13) is provided inside a bush support (14) to which a protruding strut (15) is fixed to a working device body (20) described later, and one end side of the bush support (14). The roller bearing (b) is provided at the tip end side of the bush support column (16) which is erected on the working device body (20) at a position below the connecting side of the arm (1d).
Is swingably connected via.

Next, from the front side of the connecting portion of the support (11) with the link (1f), in the radial direction of the shaft portion (12) at a position distributed to the left and right with respect to the longitudinal axis of the arm (1d). Trunnion type hydraulic cylinder that can swing in the center direction (17)
And a rod that expands and contracts downward in the cylinder (17) is connected to the other end of the bush support (14) via a spherical bush (18).

On the other hand, for details of the working device body (20), the disc body (2) fixed to the protruding column (15) and the bush column (16) is described.
1) and an outer ring (22a) fixed to the lower surface near the outer edge of the disc body (21), and an internal ring gear (22) rotatably provided via a plurality of balls.
The slewing bearing (22) consisting of b) and is fixed.

Further, on the upper surface of the disc body (21) in the drawing, the teeth of the pinion gear (23a) penetrating the disc body (21) and projecting downward are meshed with the teeth of the internal ring gear (22b). And a rotary blade having a flat plate-shaped leveling section (24b) on the lower surface of the internal ring gear (22b) via a mounting disk section (24a). 24) is fixed.

Hereinafter, the operation mode of the swinging work device (10) having the above-described configuration will be described. First, the hydraulic excavator main body (1) is placed in a horizontal state, and then the boom (1c), the arm (1d), the bucket cylinder (1e), and Is operated to move the swinging working device (10) to a predetermined position.

Then, the hydraulic motor (23) is driven as necessary to rotate the rotary blade (24) via the pinion gear (23a) and the internal ring gear (22b), while the boom (1
If c) is rocked to the left and right, the surface of the cast unsolidified concrete will be leveled.

Then, in such leveling work, when leveling the inclined surface evenly or when it is necessary to adjust the levelness of the rotary blade (24), the rods of the two hydraulic cylinders (17) are synchronously expanded and contracted. By adjusting the levelness of the rotary blade (24) by using the rotary blade (24), the purpose can be easily achieved without operating the boom (1c), the arm (1d) and the bucket cylinder (1e).

Therefore, it becomes possible to perform a predetermined work with extremely high efficiency as compared with the related art.

Further, according to the swinging working device (10) for a work vehicle, it can be used for surface finishing work on slopes such as in dams and land reclamation works, and for example, the lower side of the rotary blade (24) is grooved. Inner surface finish that finishes the inside of the groove by moving the hydraulic excavator main body (1) forward and backward while forming it in the cross-sectional shape of, and maintaining it in a state orthogonal to the longitudinal centerline of the arm (1d). Work can also be done.

By the way, an example in which the swing working device (10) having the rotating blade (24) is attached to the tip of the arm (1d) of the hydraulic excavator body (1) called a mini excavator has been described above. ) And the internal ring gear (22b) by changing the gear ratio to increase the rotational speed of the internal ring gear (23b) and replace the rotary blade (24) with a rotary blade, the excavator body (1) By operating the rod of the hydraulic cylinder (17) to expand and contract according to the unevenness of the ground while traveling, weeds and shrubs can be mowed.

In addition, if a gripping device having a well-known configuration that is opened and closed by a hydraulic cylinder is attached to the lower surface side of the disk body (21) to which the projecting strut (15) and the bush strut (16) are fixed, Since this working device (10) has a swinging joint part, it can be finely operated, so that the work of laying concrete pipes and groove type molded products at the time of laying concrete blocks and grooving work can be done more efficiently. It can be carried out.

Further, as described above, the hydraulic excavator main body (1) called a mini excavator has been described as an example, but the technical idea can be applied to a so-called normal hydraulic excavator in which the superstructure (1b) rotates. Is to be easily understood.

It should be noted that the above-described embodiment is merely a specific example of the present invention, and therefore the scope of the technical idea of the present invention is not limited by this embodiment, and the design change is made within the scope not departing from the technical idea. And so on.

[Effect of device]

As described in detail above, according to the swing working device for a working vehicle according to the present invention, the working device main body is provided on the upper portion of the support body equidistant from the radial center of the shaft portion in the direction of the shaft portion. Since at least two rods of the hydraulic cylinders that are swingably supported are pivotally attached at their tips, the work vehicle travels and turns, the boom, the arm, and the attachment operating cylinder are operated by the extension and contraction work of these rods. Since the main body of the working device can be freely swung around the support portion of the spherical bush without any need, it is possible to easily perform the work of slightly adjusting the position of the working device without changing the position of the working device itself. Therefore, it is not necessary to rely on human power even for fine work, and it is extremely effective in improving work efficiency and labor saving of fine work.

[Brief description of drawings]

1 to 4 relate to an embodiment of the present invention, FIG. 1 is a perspective view showing an entire working vehicle equipped with a swinging working device, and FIG. 2 is a partially cutaway side cross section of the swinging working device. FIG. 3 is a sectional view taken along line III-III in FIG. 2, and FIG. 4 is a sectional view taken along line IV-IV in FIG. (B) …… Roller bearing, (1) …… Hydraulic excavator body, (1a) …… Lower structure, (1b) …… Upper structure, (1
c) ... boom, (1d) ... arm, (1e) ... bucket cylinder, (1f) ... link, (10) ... swinging work device, (11) ... support, (12) ... … Shaft, (13) (1
8) …… Spherical bush, (14) …… Bush support, (1
5) …… Projection support, (16) …… Bush support, (17)
...... Hydraulic cylinder, (20) …… Working device body, (21)…
… Disc body, (22) …… Slewing bearing, (23) …… Hydraulic motor, (24)… Rotary blade.

Claims (1)

[Scope of utility model registration request] 1. A neck for a working vehicle, which is swingably attached to a tip of the arm of a working vehicle having a boom swinging vertically and horizontally and an arm swingably supported by a tip of the boom. In the swinging work device, a support body having a shaft portion on the side opposite to the mounting side is swingably attached to the tip of the arm by expansion and contraction of a rod of an attachment actuation cylinder, and a spherical bush externally fitted to the shaft portion is attached. The work device main body via the above, and at least two hydraulic cylinders are swingably supported in the direction of the shaft portion above the support body that is equidistant from the radial center of the shaft portion. A swinging working device for a working vehicle, wherein the tip of each rod of a hydraulic cylinder is pivotally attached to the working device body.