JPH02493B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backhoe that can be used in confined spaces.

Generally, when using a bucket hoe for pipe burying work on a narrow road, the soil at the rear of the vehicle is scooped up with a bucket at the tip of the boom device, the boom device is bent and raised, and then turned, and the dirt is placed in the dump truck in front of the vehicle. The soil in the bucket is loaded.

However, as shown in FIG. 1, the conventional boxhoe has a structure in which a driver's seat 02 is provided in the center of a swivel base 01, and a boom device 03 is provided in front of the driver's seat 02 so as to be slidable in the left and right direction. If you try to raise the boom device when the boom device is turned, the driver's seat is behind the boom device.
There was a problem that the boom device could not be erected sufficiently, and the distance H from the center of rotation to the tip of the boom device became very large, making it impossible to turn it in a narrow space.

In order to solve the above-mentioned problems, the present invention provides a driver's seat on the side of the boom device and allows it to slide integrally with the boom device.

The following embodiment will be explained with reference to the drawings. 1 is the vehicle body 2.
With the subframe fixed above, the corresponding subframe 1
At the rear of the swivel table 4 is rotated by a hydraulic motor 3.
is installed.

A pair of front and rear guide rails 5, 5 extending in the left-right direction are mounted on the swivel table 4, and a flat board 6 is supported by the guide rails 5, 5 so as to be slidable in the left-right direction.

A hydraulic cylinder 7 for sliding the base plate 6 is provided between the swivel base 4 and the base plate 6 in parallel with the guide rails 5, 5, and each end of the hydraulic cylinder 7 is attached to the swivel base 4 and the base plate 6 with an axis. It is supported.

A driver's seat 8 is provided on the left side of the board 6 (upper side in FIG. 4), and a boom device 9 is provided on the right side (lower side in FIG. 4).
is provided.

A plurality of operating levers 10 for controlling the boom device 9 are provided in front of the driver's seat 8. The boom device 9 has a base end of a first boom 11 formed in a V-shape pivotally supported through brackets 12, 12 provided in the vicinity of the center of rotation on the base plate 6 so as to be rotatable back and forth. The base of a second boom 13 is pivotably supported at the tip of the boom 11 so as to be bendable.

Further, between the base plate 6 and the first boom 11, there is a first hydraulic cylinder 14 for rotating the first boom 11, and between the first boom 11 and the second boom 13 there is a second hydraulic cylinder for bending the second boom 13. A hydraulic cylinder 15 is provided respectively.

A bucket 16 is rotatably supported at the tip of the second boom 13, and the bucket 16 is rotated by a third hydraulic cylinder 17 that is pivotally supported by the second boom 13.

18 are outriggers provided on the front, rear, left and right sides of the subframe 1.

19 is a cradle when the boom device 9 is stored.

20 is a dump truck.

In the embodiment, the driver's seat is provided on the left side of the boom device, but the same effect can be obtained even if the driver's seat is provided on the right side of the boom device.

The operation of the present invention will now be described with the above-described construction. When the vehicle is traveling, the boom device 9 is retracted and retracted onto the cradle 9 in front of the vehicle body 2, as shown in FIG. 2.

Next, when working in a narrow place with a road width L, first use the outrigger 1 as shown in Figures 3 and 4.
8 is extended to raise the vehicle body 2, and in this state, the first hydraulic cylinder 14, the second hydraulic cylinder 15, and the third hydraulic cylinder 17 are extended and contracted, and the boom device 9 is extended to the position shown by the solid line in FIG. 3 for excavation. The excavated soil is scooped up with a bucket 16, and the boom device 9 is bent and raised up to the dashed line in FIG.

At that time, since the driver's seat 8 is located on the left side of the boom device 9, the driver's seat 8 does not get in the way even when the first boom 11 is rotated backward, and the first boom 11 can be rotated sufficiently backward. As a result, the distance h from the center of rotation of the swivel base 4 to the tip of the boom device 9 can be shortened, and the boom device 9 can be rotated even in places where the road width L is narrow.

Next, with the boom device 9 bent and raised, it is rotated to a position in front of the vehicle body 2 by the operation of the hydraulic motor 3.

After that, the first hydraulic cylinder 14, the second hydraulic cylinder 15, and the third hydraulic cylinder 17 are expanded and contracted,
The boom device 9 is extended to the position indicated by the two-dot chain line in FIG. 3, and the soil in the bucket 16 is loaded into the dump truck 20. By repeating the above operations, a trench for burying the pipe can be dug.

In addition, when increasing the width of the groove, the swivel base 4
A hydraulic cylinder 7 provided between the base plate 6 and the base plate 6
Since the substrate 6 can be slid by expanding and contracting, it is possible to dig an arbitrary width.

At this time, the driver's seat 8 is also mounted on the board 6 and slides together with the boom device 9, so no matter where the boom device 9 is located, the boom device 9 can be moved a very short distance from the center of rotation. It is possible to make the refraction erect within the range of .

As described above, in the present invention, a base plate is slidably provided on a rotating base, a boom device and a driver's seat are provided in parallel on the base plate, and the base end of the boom device is provided near the center of rotation. The boom device can be bent and erected within a very short distance from the center of rotation, making it easy to perform excavation work in narrow spaces.

In addition, since the operator's seat is designed to slide together with the boom device, no matter what excavation position the boom device is in, the boom device can be rotated from the same position without having to slide. It is possible to bend and raise the groove within a very short distance from the groove, and when increasing the width of the groove, it is easy to do so by simply sliding the base. Furthermore, since the boom device is always located at a constant distance from the driver's seat, work efficiency is greatly improved and erroneous operations are eliminated.

[Brief explanation of drawings]

FIG. 1 is a conventional example, FIG. 2 is an overall view of the present invention, FIG. 3 is an operating state diagram, and FIG. 4 is a top view. 4 is a swivel base, 6 is a base plate, 8 is a driver's seat, and 9 is a boom device.

Claims (1)

[Claims] 1 A swivel base is provided at the rear of the vehicle body, a board is provided on the swivel base so as to be slidable in the left and right direction, and a base end of a bendable boom device having a bucket at the tip is mounted on the base board near the center of the swivel. A backhoe is provided with a driver's seat on the left or right side of the boom device, and the driver's seat is slidable and pivotable together with the boom device.